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-rw-r--r--drivers/gpu/drm/bridge/Kconfig393
-rw-r--r--drivers/gpu/drm/bridge/Makefile40
-rw-r--r--drivers/gpu/drm/bridge/adv7511/Kconfig25
-rw-r--r--drivers/gpu/drm/bridge/adv7511/Makefile5
-rw-r--r--drivers/gpu/drm/bridge/adv7511/adv7511.h425
-rw-r--r--drivers/gpu/drm/bridge/adv7511/adv7511_audio.c256
-rw-r--r--drivers/gpu/drm/bridge/adv7511/adv7511_cec.c392
-rw-r--r--drivers/gpu/drm/bridge/adv7511/adv7511_drv.c1437
-rw-r--r--drivers/gpu/drm/bridge/adv7511/adv7533.c201
-rw-r--r--drivers/gpu/drm/bridge/analogix/Kconfig45
-rw-r--r--drivers/gpu/drm/bridge/analogix/Makefile6
-rw-r--r--drivers/gpu/drm/bridge/analogix/analogix-anx6345.c828
-rw-r--r--drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c1401
-rw-r--r--drivers/gpu/drm/bridge/analogix/analogix-anx78xx.h249
-rw-r--r--drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c165
-rw-r--r--drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.h256
-rw-r--r--drivers/gpu/drm/bridge/analogix/analogix-i2c-txcommon.h234
-rw-r--r--drivers/gpu/drm/bridge/analogix/analogix_dp_core.c1910
-rw-r--r--drivers/gpu/drm/bridge/analogix/analogix_dp_core.h259
-rw-r--r--drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c1154
-rw-r--r--drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h417
-rw-r--r--drivers/gpu/drm/bridge/analogix/anx7625.c2822
-rw-r--r--drivers/gpu/drm/bridge/analogix/anx7625.h486
-rw-r--r--drivers/gpu/drm/bridge/cadence/Kconfig27
-rw-r--r--drivers/gpu/drm/bridge/cadence/Makefile4
-rw-r--r--drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c2649
-rw-r--r--drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h422
-rw-r--r--drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c571
-rw-r--r--drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.h92
-rw-r--r--drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c78
-rw-r--r--drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h19
-rw-r--r--drivers/gpu/drm/bridge/cdns-dsi.c1330
-rw-r--r--drivers/gpu/drm/bridge/chipone-icn6211.c827
-rw-r--r--drivers/gpu/drm/bridge/chrontel-ch7033.c620
-rw-r--r--drivers/gpu/drm/bridge/cros-ec-anx7688.c189
-rw-r--r--drivers/gpu/drm/bridge/display-connector.c439
-rw-r--r--drivers/gpu/drm/bridge/fsl-ldb.c326
-rw-r--r--drivers/gpu/drm/bridge/imx/Kconfig47
-rw-r--r--drivers/gpu/drm/bridge/imx/Makefile9
-rw-r--r--drivers/gpu/drm/bridge/imx/imx-ldb-helper.c221
-rw-r--r--drivers/gpu/drm/bridge/imx/imx-ldb-helper.h96
-rw-r--r--drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c588
-rw-r--r--drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c723
-rw-r--r--drivers/gpu/drm/bridge/imx/imx8qxp-pixel-combiner.c450
-rw-r--r--drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c430
-rw-r--r--drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c488
-rw-r--r--drivers/gpu/drm/bridge/ite-it6505.c3369
-rw-r--r--drivers/gpu/drm/bridge/ite-it66121.c1665
-rw-r--r--drivers/gpu/drm/bridge/lontium-lt8912b.c783
-rw-r--r--drivers/gpu/drm/bridge/lontium-lt9211.c801
-rw-r--r--drivers/gpu/drm/bridge/lontium-lt9611.c1267
-rw-r--r--drivers/gpu/drm/bridge/lontium-lt9611uxc.c1024
-rw-r--r--drivers/gpu/drm/bridge/lvds-codec.c256
-rw-r--r--drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c461
-rw-r--r--drivers/gpu/drm/bridge/nwl-dsi.c1227
-rw-r--r--drivers/gpu/drm/bridge/nwl-dsi.h144
-rw-r--r--drivers/gpu/drm/bridge/nxp-ptn3460.c350
-rw-r--r--drivers/gpu/drm/bridge/panel.c497
-rw-r--r--drivers/gpu/drm/bridge/parade-ps8622.c552
-rw-r--r--drivers/gpu/drm/bridge/parade-ps8640.c799
-rw-r--r--drivers/gpu/drm/bridge/sii902x.c1182
-rw-r--r--drivers/gpu/drm/bridge/sii9234.c970
-rw-r--r--drivers/gpu/drm/bridge/sil-sii8620.c2388
-rw-r--r--drivers/gpu/drm/bridge/sil-sii8620.h1532
-rw-r--r--drivers/gpu/drm/bridge/simple-bridge.c314
-rw-r--r--drivers/gpu/drm/bridge/synopsys/Kconfig53
-rw-r--r--drivers/gpu/drm/bridge/synopsys/Makefile8
-rw-r--r--drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c640
-rw-r--r--drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h23
-rw-r--r--drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c321
-rw-r--r--drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.h19
-rw-r--r--drivers/gpu/drm/bridge/synopsys/dw-hdmi-gp-audio.c197
-rw-r--r--drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c239
-rw-r--r--drivers/gpu/drm/bridge/synopsys/dw-hdmi.c3712
-rw-r--r--drivers/gpu/drm/bridge/synopsys/dw-hdmi.h1168
-rw-r--r--drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c1245
-rw-r--r--drivers/gpu/drm/bridge/tc358762.c270
-rw-r--r--drivers/gpu/drm/bridge/tc358764.c412
-rw-r--r--drivers/gpu/drm/bridge/tc358767.c2219
-rw-r--r--drivers/gpu/drm/bridge/tc358768.c1156
-rw-r--r--drivers/gpu/drm/bridge/tc358775.c739
-rw-r--r--drivers/gpu/drm/bridge/thc63lvd1024.c260
-rw-r--r--drivers/gpu/drm/bridge/ti-dlpc3433.c416
-rw-r--r--drivers/gpu/drm/bridge/ti-sn65dsi83.c761
-rw-r--r--drivers/gpu/drm/bridge/ti-sn65dsi86.c2025
-rw-r--r--drivers/gpu/drm/bridge/ti-tfp410.c465
-rw-r--r--drivers/gpu/drm/bridge/ti-tpd12s015.c211
87 files changed, 60191 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
new file mode 100644
index 000000000..12baf9ba0
--- /dev/null
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -0,0 +1,393 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config DRM_BRIDGE
+ def_bool y
+ depends on DRM
+ help
+ Bridge registration and lookup framework.
+
+config DRM_PANEL_BRIDGE
+ def_bool y
+ depends on DRM_BRIDGE
+ select DRM_PANEL
+ help
+ DRM bridge wrapper of DRM panels
+
+menu "Display Interface Bridges"
+ depends on DRM && DRM_BRIDGE
+
+config DRM_CDNS_DSI
+ tristate "Cadence DPI/DSI bridge"
+ select DRM_KMS_HELPER
+ select DRM_MIPI_DSI
+ select DRM_PANEL_BRIDGE
+ select GENERIC_PHY_MIPI_DPHY
+ depends on OF
+ help
+ Support Cadence DPI to DSI bridge. This is an internal
+ bridge and is meant to be directly embedded in a SoC.
+
+config DRM_CHIPONE_ICN6211
+ tristate "Chipone ICN6211 MIPI-DSI/RGB Converter bridge"
+ depends on OF
+ select DRM_KMS_HELPER
+ select DRM_MIPI_DSI
+ select DRM_PANEL_BRIDGE
+ select REGMAP_I2C
+ help
+ ICN6211 is MIPI-DSI/RGB Converter bridge from chipone.
+
+ It has a flexible configuration of MIPI DSI signal input
+ and produce RGB565, RGB666, RGB888 output format.
+
+ If in doubt, say "N".
+
+config DRM_CHRONTEL_CH7033
+ tristate "Chrontel CH7033 Video Encoder"
+ depends on OF
+ select DRM_KMS_HELPER
+ help
+ Enable support for the Chrontel CH7033 VGA/DVI/HDMI Encoder, as
+ found in the Dell Wyse 3020 thin client.
+
+ If in doubt, say "N".
+
+config DRM_CROS_EC_ANX7688
+ tristate "ChromeOS EC ANX7688 bridge"
+ depends on OF
+ depends on I2C_CROS_EC_TUNNEL || COMPILE_TEST
+ select DRM_KMS_HELPER
+ select REGMAP_I2C
+ help
+ ChromeOS EC ANX7688 is an ultra-low power
+ 4K Ultra-HD (4096x2160p60) mobile HD transmitter
+ designed for ChromeOS devices. It converts HDMI
+ 2.0 to DisplayPort 1.3 Ultra-HD. It is connected
+ to the ChromeOS Embedded Controller.
+
+config DRM_DISPLAY_CONNECTOR
+ tristate "Display connector support"
+ depends on OF
+ help
+ Driver for display connectors with support for DDC and hot-plug
+ detection. Most display controllers handle display connectors
+ internally and don't need this driver, but the DRM subsystem is
+ moving towards separating connector handling from display controllers
+ on ARM-based platforms. Saying Y here when this driver is not needed
+ will not cause any issue.
+
+config DRM_FSL_LDB
+ tristate "Freescale i.MX8MP LDB bridge"
+ depends on OF
+ depends on ARCH_MXC || COMPILE_TEST
+ select DRM_KMS_HELPER
+ select DRM_PANEL_BRIDGE
+ help
+ Support for i.MX8MP DPI-to-LVDS on-SoC encoder.
+
+config DRM_ITE_IT6505
+ tristate "ITE IT6505 DisplayPort bridge"
+ depends on OF
+ select DRM_DISPLAY_DP_HELPER
+ select DRM_DISPLAY_HDCP_HELPER
+ select DRM_DISPLAY_HELPER
+ select DRM_DP_AUX_BUS
+ select DRM_KMS_HELPER
+ select DRM_DP_HELPER
+ select EXTCON
+ select CRYPTO
+ select CRYPTO_HASH
+ help
+ ITE IT6505 DisplayPort bridge chip driver.
+
+config DRM_LONTIUM_LT8912B
+ tristate "Lontium LT8912B DSI/HDMI bridge"
+ depends on OF
+ select DRM_PANEL_BRIDGE
+ select DRM_KMS_HELPER
+ select DRM_MIPI_DSI
+ select REGMAP_I2C
+ select VIDEOMODE_HELPERS
+ help
+ Driver for Lontium LT8912B DSI to HDMI bridge
+ chip driver.
+ Please say Y if you have such hardware.
+
+ Say M here if you want to support this hardware as a module.
+ The module will be named "lontium-lt8912b".
+
+config DRM_LONTIUM_LT9211
+ tristate "Lontium LT9211 DSI/LVDS/DPI bridge"
+ depends on OF
+ select DRM_PANEL_BRIDGE
+ select DRM_KMS_HELPER
+ select DRM_MIPI_DSI
+ select REGMAP_I2C
+ help
+ Driver for Lontium LT9211 Single/Dual-Link DSI/LVDS or Single DPI
+ input to Single-link/Dual-Link DSI/LVDS or Single DPI output bridge
+ chip.
+ Please say Y if you have such hardware.
+
+config DRM_LONTIUM_LT9611
+ tristate "Lontium LT9611 DSI/HDMI bridge"
+ select SND_SOC_HDMI_CODEC if SND_SOC
+ depends on OF
+ select DRM_PANEL_BRIDGE
+ select DRM_KMS_HELPER
+ select DRM_MIPI_DSI
+ select REGMAP_I2C
+ help
+ Driver for Lontium LT9611 DSI to HDMI bridge
+ chip driver that converts dual DSI and I2S to
+ HDMI signals
+ Please say Y if you have such hardware.
+
+config DRM_LONTIUM_LT9611UXC
+ tristate "Lontium LT9611UXC DSI/HDMI bridge"
+ select SND_SOC_HDMI_CODEC if SND_SOC
+ depends on OF
+ select DRM_PANEL_BRIDGE
+ select DRM_KMS_HELPER
+ select DRM_MIPI_DSI
+ select REGMAP_I2C
+ help
+ Driver for Lontium LT9611UXC DSI to HDMI bridge
+ chip driver that converts dual DSI and I2S to
+ HDMI signals
+ Please say Y if you have such hardware.
+
+config DRM_ITE_IT66121
+ tristate "ITE IT66121 HDMI bridge"
+ depends on OF
+ select DRM_KMS_HELPER
+ select REGMAP_I2C
+ help
+ Support for ITE IT66121 HDMI bridge.
+
+config DRM_LVDS_CODEC
+ tristate "Transparent LVDS encoders and decoders support"
+ depends on OF
+ select DRM_KMS_HELPER
+ select DRM_PANEL_BRIDGE
+ help
+ Support for transparent LVDS encoders and decoders that don't
+ require any configuration.
+
+config DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW
+ tristate "MegaChips stdp4028-ge-b850v3-fw and stdp2690-ge-b850v3-fw"
+ depends on OF
+ select DRM_KMS_HELPER
+ select DRM_PANEL
+ help
+ This is a driver for the display bridges of
+ GE B850v3 that convert dual channel LVDS
+ to DP++. This is used with the i.MX6 imx-ldb
+ driver. You are likely to say N here.
+
+config DRM_NWL_MIPI_DSI
+ tristate "Northwest Logic MIPI DSI Host controller"
+ depends on DRM
+ depends on COMMON_CLK
+ depends on OF && HAS_IOMEM
+ select DRM_KMS_HELPER
+ select DRM_MIPI_DSI
+ select DRM_PANEL_BRIDGE
+ select GENERIC_PHY_MIPI_DPHY
+ select MFD_SYSCON
+ select MULTIPLEXER
+ select REGMAP_MMIO
+ help
+ This enables the Northwest Logic MIPI DSI Host controller as
+ for example found on NXP's i.MX8 Processors.
+
+config DRM_NXP_PTN3460
+ tristate "NXP PTN3460 DP/LVDS bridge"
+ depends on OF
+ select DRM_KMS_HELPER
+ select DRM_PANEL
+ help
+ NXP PTN3460 eDP-LVDS bridge chip driver.
+
+config DRM_PARADE_PS8622
+ tristate "Parade eDP/LVDS bridge"
+ depends on OF
+ select DRM_PANEL
+ select DRM_KMS_HELPER
+ select BACKLIGHT_CLASS_DEVICE
+ help
+ Parade eDP-LVDS bridge chip driver.
+
+config DRM_PARADE_PS8640
+ tristate "Parade PS8640 MIPI DSI to eDP Converter"
+ depends on OF
+ select DRM_DISPLAY_DP_HELPER
+ select DRM_DISPLAY_HELPER
+ select DRM_DP_AUX_BUS
+ select DRM_KMS_HELPER
+ select DRM_MIPI_DSI
+ select DRM_PANEL
+ help
+ Choose this option if you have PS8640 for display
+ The PS8640 is a high-performance and low-power
+ MIPI DSI to eDP converter
+
+config DRM_SIL_SII8620
+ tristate "Silicon Image SII8620 HDMI/MHL bridge"
+ depends on OF
+ select DRM_KMS_HELPER
+ select EXTCON
+ depends on RC_CORE || !RC_CORE
+ help
+ Silicon Image SII8620 HDMI/MHL bridge chip driver.
+
+config DRM_SII902X
+ tristate "Silicon Image sii902x RGB/HDMI bridge"
+ depends on OF
+ select DRM_KMS_HELPER
+ select REGMAP_I2C
+ select I2C_MUX
+ select SND_SOC_HDMI_CODEC if SND_SOC
+ help
+ Silicon Image sii902x bridge chip driver.
+
+config DRM_SII9234
+ tristate "Silicon Image SII9234 HDMI/MHL bridge"
+ depends on OF
+ help
+ Say Y here if you want support for the MHL interface.
+ It is an I2C driver, that detects connection of MHL bridge
+ and starts encapsulation of HDMI signal.
+
+config DRM_SIMPLE_BRIDGE
+ tristate "Simple DRM bridge support"
+ depends on OF
+ select DRM_KMS_HELPER
+ help
+ Support for non-programmable DRM bridges, such as ADI ADV7123, TI
+ THS8134 and THS8135 or passive resistor ladder DACs.
+
+config DRM_THINE_THC63LVD1024
+ tristate "Thine THC63LVD1024 LVDS decoder bridge"
+ depends on OF
+ help
+ Thine THC63LVD1024 LVDS/parallel converter driver.
+
+config DRM_TOSHIBA_TC358762
+ tristate "TC358762 DSI/DPI bridge"
+ depends on OF
+ select DRM_MIPI_DSI
+ select DRM_KMS_HELPER
+ select DRM_PANEL_BRIDGE
+ help
+ Toshiba TC358762 DSI/DPI bridge driver.
+
+config DRM_TOSHIBA_TC358764
+ tristate "TC358764 DSI/LVDS bridge"
+ depends on OF
+ select DRM_MIPI_DSI
+ select DRM_KMS_HELPER
+ select DRM_PANEL
+ help
+ Toshiba TC358764 DSI/LVDS bridge driver.
+
+config DRM_TOSHIBA_TC358767
+ tristate "Toshiba TC358767 eDP bridge"
+ depends on OF
+ select DRM_DISPLAY_DP_HELPER
+ select DRM_DISPLAY_HELPER
+ select DRM_KMS_HELPER
+ select REGMAP_I2C
+ select DRM_MIPI_DSI
+ select DRM_PANEL
+ help
+ Toshiba TC358767 eDP bridge chip driver.
+
+config DRM_TOSHIBA_TC358768
+ tristate "Toshiba TC358768 MIPI DSI bridge"
+ depends on OF
+ select DRM_KMS_HELPER
+ select REGMAP_I2C
+ select DRM_PANEL
+ select DRM_MIPI_DSI
+ select VIDEOMODE_HELPERS
+ help
+ Toshiba TC358768AXBG/TC358778XBG DSI bridge chip driver.
+
+config DRM_TOSHIBA_TC358775
+ tristate "Toshiba TC358775 DSI/LVDS bridge"
+ depends on OF
+ select DRM_DISPLAY_DP_HELPER
+ select DRM_DISPLAY_HELPER
+ select DRM_KMS_HELPER
+ select REGMAP_I2C
+ select DRM_PANEL
+ select DRM_MIPI_DSI
+ help
+ Toshiba TC358775 DSI/LVDS bridge chip driver.
+
+config DRM_TI_DLPC3433
+ tristate "TI DLPC3433 Display controller"
+ depends on DRM && DRM_PANEL
+ depends on OF
+ select DRM_MIPI_DSI
+ help
+ TI DLPC3433 is a MIPI DSI based display controller bridge
+ for processing high resolution DMD based projectors.
+
+ It has a flexible configuration of MIPI DSI and DPI signal
+ input that produces a DMD output in RGB565, RGB666, RGB888
+ formats.
+
+ It supports upto 720p resolution with 60 and 120 Hz refresh
+ rates.
+
+config DRM_TI_TFP410
+ tristate "TI TFP410 DVI/HDMI bridge"
+ depends on OF
+ select DRM_KMS_HELPER
+ help
+ Texas Instruments TFP410 DVI/HDMI Transmitter driver
+
+config DRM_TI_SN65DSI83
+ tristate "TI SN65DSI83 and SN65DSI84 DSI to LVDS bridge"
+ depends on OF
+ select DRM_KMS_HELPER
+ select REGMAP_I2C
+ select DRM_PANEL
+ select DRM_MIPI_DSI
+ help
+ Texas Instruments SN65DSI83 and SN65DSI84 DSI to LVDS Bridge driver
+
+config DRM_TI_SN65DSI86
+ tristate "TI SN65DSI86 DSI to eDP bridge"
+ depends on OF
+ select DRM_DISPLAY_DP_HELPER
+ select DRM_DISPLAY_HELPER
+ select DRM_KMS_HELPER
+ select REGMAP_I2C
+ select DRM_PANEL
+ select DRM_MIPI_DSI
+ select AUXILIARY_BUS
+ select DRM_DP_AUX_BUS
+ help
+ Texas Instruments SN65DSI86 DSI to eDP Bridge driver
+
+config DRM_TI_TPD12S015
+ tristate "TI TPD12S015 HDMI level shifter and ESD protection"
+ depends on OF
+ select DRM_KMS_HELPER
+ help
+ Texas Instruments TPD12S015 HDMI level shifter and ESD protection
+ driver.
+
+source "drivers/gpu/drm/bridge/analogix/Kconfig"
+
+source "drivers/gpu/drm/bridge/adv7511/Kconfig"
+
+source "drivers/gpu/drm/bridge/cadence/Kconfig"
+
+source "drivers/gpu/drm/bridge/imx/Kconfig"
+
+source "drivers/gpu/drm/bridge/synopsys/Kconfig"
+
+endmenu
diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
new file mode 100644
index 000000000..1884803c6
--- /dev/null
+++ b/drivers/gpu/drm/bridge/Makefile
@@ -0,0 +1,40 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_DRM_CDNS_DSI) += cdns-dsi.o
+obj-$(CONFIG_DRM_CHIPONE_ICN6211) += chipone-icn6211.o
+obj-$(CONFIG_DRM_CHRONTEL_CH7033) += chrontel-ch7033.o
+obj-$(CONFIG_DRM_CROS_EC_ANX7688) += cros-ec-anx7688.o
+obj-$(CONFIG_DRM_DISPLAY_CONNECTOR) += display-connector.o
+obj-$(CONFIG_DRM_FSL_LDB) += fsl-ldb.o
+obj-$(CONFIG_DRM_ITE_IT6505) += ite-it6505.o
+obj-$(CONFIG_DRM_LONTIUM_LT8912B) += lontium-lt8912b.o
+obj-$(CONFIG_DRM_LONTIUM_LT9211) += lontium-lt9211.o
+obj-$(CONFIG_DRM_LONTIUM_LT9611) += lontium-lt9611.o
+obj-$(CONFIG_DRM_LONTIUM_LT9611UXC) += lontium-lt9611uxc.o
+obj-$(CONFIG_DRM_LVDS_CODEC) += lvds-codec.o
+obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) += megachips-stdpxxxx-ge-b850v3-fw.o
+obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o
+obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
+obj-$(CONFIG_DRM_PARADE_PS8640) += parade-ps8640.o
+obj-$(CONFIG_DRM_SIL_SII8620) += sil-sii8620.o
+obj-$(CONFIG_DRM_SII902X) += sii902x.o
+obj-$(CONFIG_DRM_SII9234) += sii9234.o
+obj-$(CONFIG_DRM_SIMPLE_BRIDGE) += simple-bridge.o
+obj-$(CONFIG_DRM_THINE_THC63LVD1024) += thc63lvd1024.o
+obj-$(CONFIG_DRM_TOSHIBA_TC358762) += tc358762.o
+obj-$(CONFIG_DRM_TOSHIBA_TC358764) += tc358764.o
+obj-$(CONFIG_DRM_TOSHIBA_TC358767) += tc358767.o
+obj-$(CONFIG_DRM_TOSHIBA_TC358768) += tc358768.o
+obj-$(CONFIG_DRM_TOSHIBA_TC358775) += tc358775.o
+obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511/
+obj-$(CONFIG_DRM_TI_DLPC3433) += ti-dlpc3433.o
+obj-$(CONFIG_DRM_TI_SN65DSI83) += ti-sn65dsi83.o
+obj-$(CONFIG_DRM_TI_SN65DSI86) += ti-sn65dsi86.o
+obj-$(CONFIG_DRM_TI_TFP410) += ti-tfp410.o
+obj-$(CONFIG_DRM_TI_TPD12S015) += ti-tpd12s015.o
+obj-$(CONFIG_DRM_NWL_MIPI_DSI) += nwl-dsi.o
+obj-$(CONFIG_DRM_ITE_IT66121) += ite-it66121.o
+
+obj-y += analogix/
+obj-y += cadence/
+obj-y += imx/
+obj-y += synopsys/
diff --git a/drivers/gpu/drm/bridge/adv7511/Kconfig b/drivers/gpu/drm/bridge/adv7511/Kconfig
new file mode 100644
index 000000000..f46a5e26b
--- /dev/null
+++ b/drivers/gpu/drm/bridge/adv7511/Kconfig
@@ -0,0 +1,25 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config DRM_I2C_ADV7511
+ tristate "ADV7511 encoder"
+ depends on OF
+ select DRM_KMS_HELPER
+ select REGMAP_I2C
+ select DRM_MIPI_DSI
+ help
+ Support for the Analog Devices ADV7511(W)/13/33/35 HDMI encoders.
+
+config DRM_I2C_ADV7511_AUDIO
+ bool "ADV7511 HDMI Audio driver"
+ depends on DRM_I2C_ADV7511 && SND_SOC
+ select SND_SOC_HDMI_CODEC
+ help
+ Support the ADV7511 HDMI Audio interface. This is used in
+ conjunction with the AV7511 HDMI driver.
+
+config DRM_I2C_ADV7511_CEC
+ bool "ADV7511/33/35 HDMI CEC driver"
+ depends on DRM_I2C_ADV7511
+ select CEC_CORE
+ default y
+ help
+ When selected the HDMI transmitter will support the CEC feature.
diff --git a/drivers/gpu/drm/bridge/adv7511/Makefile b/drivers/gpu/drm/bridge/adv7511/Makefile
new file mode 100644
index 000000000..d8ceb534b
--- /dev/null
+++ b/drivers/gpu/drm/bridge/adv7511/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-only
+adv7511-y := adv7511_drv.o adv7533.o
+adv7511-$(CONFIG_DRM_I2C_ADV7511_AUDIO) += adv7511_audio.o
+adv7511-$(CONFIG_DRM_I2C_ADV7511_CEC) += adv7511_cec.o
+obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511.o
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h b/drivers/gpu/drm/bridge/adv7511/adv7511.h
new file mode 100644
index 000000000..174458002
--- /dev/null
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h
@@ -0,0 +1,425 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Analog Devices ADV7511 HDMI transmitter driver
+ *
+ * Copyright 2012 Analog Devices Inc.
+ */
+
+#ifndef __DRM_I2C_ADV7511_H__
+#define __DRM_I2C_ADV7511_H__
+
+#include <linux/hdmi.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drm_bridge.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+
+#define ADV7511_REG_CHIP_REVISION 0x00
+#define ADV7511_REG_N0 0x01
+#define ADV7511_REG_N1 0x02
+#define ADV7511_REG_N2 0x03
+#define ADV7511_REG_SPDIF_FREQ 0x04
+#define ADV7511_REG_CTS_AUTOMATIC1 0x05
+#define ADV7511_REG_CTS_AUTOMATIC2 0x06
+#define ADV7511_REG_CTS_MANUAL0 0x07
+#define ADV7511_REG_CTS_MANUAL1 0x08
+#define ADV7511_REG_CTS_MANUAL2 0x09
+#define ADV7511_REG_AUDIO_SOURCE 0x0a
+#define ADV7511_REG_AUDIO_CONFIG 0x0b
+#define ADV7511_REG_I2S_CONFIG 0x0c
+#define ADV7511_REG_I2S_WIDTH 0x0d
+#define ADV7511_REG_AUDIO_SUB_SRC0 0x0e
+#define ADV7511_REG_AUDIO_SUB_SRC1 0x0f
+#define ADV7511_REG_AUDIO_SUB_SRC2 0x10
+#define ADV7511_REG_AUDIO_SUB_SRC3 0x11
+#define ADV7511_REG_AUDIO_CFG1 0x12
+#define ADV7511_REG_AUDIO_CFG2 0x13
+#define ADV7511_REG_AUDIO_CFG3 0x14
+#define ADV7511_REG_I2C_FREQ_ID_CFG 0x15
+#define ADV7511_REG_VIDEO_INPUT_CFG1 0x16
+#define ADV7511_REG_CSC_UPPER(x) (0x18 + (x) * 2)
+#define ADV7511_REG_CSC_LOWER(x) (0x19 + (x) * 2)
+#define ADV7511_REG_SYNC_DECODER(x) (0x30 + (x))
+#define ADV7511_REG_DE_GENERATOR (0x35 + (x))
+#define ADV7511_REG_PIXEL_REPETITION 0x3b
+#define ADV7511_REG_VIC_MANUAL 0x3c
+#define ADV7511_REG_VIC_SEND 0x3d
+#define ADV7511_REG_VIC_DETECTED 0x3e
+#define ADV7511_REG_AUX_VIC_DETECTED 0x3f
+#define ADV7511_REG_PACKET_ENABLE0 0x40
+#define ADV7511_REG_POWER 0x41
+#define ADV7511_REG_STATUS 0x42
+#define ADV7511_REG_EDID_I2C_ADDR 0x43
+#define ADV7511_REG_PACKET_ENABLE1 0x44
+#define ADV7511_REG_PACKET_I2C_ADDR 0x45
+#define ADV7511_REG_DSD_ENABLE 0x46
+#define ADV7511_REG_VIDEO_INPUT_CFG2 0x48
+#define ADV7511_REG_INFOFRAME_UPDATE 0x4a
+#define ADV7511_REG_GC(x) (0x4b + (x)) /* 0x4b - 0x51 */
+#define ADV7511_REG_AVI_INFOFRAME_VERSION 0x52
+#define ADV7511_REG_AVI_INFOFRAME_LENGTH 0x53
+#define ADV7511_REG_AVI_INFOFRAME_CHECKSUM 0x54
+#define ADV7511_REG_AVI_INFOFRAME(x) (0x55 + (x)) /* 0x55 - 0x6f */
+#define ADV7511_REG_AUDIO_INFOFRAME_VERSION 0x70
+#define ADV7511_REG_AUDIO_INFOFRAME_LENGTH 0x71
+#define ADV7511_REG_AUDIO_INFOFRAME_CHECKSUM 0x72
+#define ADV7511_REG_AUDIO_INFOFRAME(x) (0x73 + (x)) /* 0x73 - 0x7c */
+#define ADV7511_REG_INT_ENABLE(x) (0x94 + (x))
+#define ADV7511_REG_INT(x) (0x96 + (x))
+#define ADV7511_REG_INPUT_CLK_DIV 0x9d
+#define ADV7511_REG_PLL_STATUS 0x9e
+#define ADV7511_REG_HDMI_POWER 0xa1
+#define ADV7511_REG_HDCP_HDMI_CFG 0xaf
+#define ADV7511_REG_AN(x) (0xb0 + (x)) /* 0xb0 - 0xb7 */
+#define ADV7511_REG_HDCP_STATUS 0xb8
+#define ADV7511_REG_BCAPS 0xbe
+#define ADV7511_REG_BKSV(x) (0xc0 + (x)) /* 0xc0 - 0xc3 */
+#define ADV7511_REG_EDID_SEGMENT 0xc4
+#define ADV7511_REG_DDC_STATUS 0xc8
+#define ADV7511_REG_EDID_READ_CTRL 0xc9
+#define ADV7511_REG_BSTATUS(x) (0xca + (x)) /* 0xca - 0xcb */
+#define ADV7511_REG_TIMING_GEN_SEQ 0xd0
+#define ADV7511_REG_POWER2 0xd6
+#define ADV7511_REG_HSYNC_PLACEMENT_MSB 0xfa
+
+#define ADV7511_REG_SYNC_ADJUSTMENT(x) (0xd7 + (x)) /* 0xd7 - 0xdc */
+#define ADV7511_REG_TMDS_CLOCK_INV 0xde
+#define ADV7511_REG_ARC_CTRL 0xdf
+#define ADV7511_REG_CEC_I2C_ADDR 0xe1
+#define ADV7511_REG_CEC_CTRL 0xe2
+#define ADV7511_REG_CHIP_ID_HIGH 0xf5
+#define ADV7511_REG_CHIP_ID_LOW 0xf6
+
+/* Hardware defined default addresses for I2C register maps */
+#define ADV7511_CEC_I2C_ADDR_DEFAULT 0x3c
+#define ADV7511_EDID_I2C_ADDR_DEFAULT 0x3f
+#define ADV7511_PACKET_I2C_ADDR_DEFAULT 0x38
+
+#define ADV7511_CSC_ENABLE BIT(7)
+#define ADV7511_CSC_UPDATE_MODE BIT(5)
+
+#define ADV7511_INT0_HPD BIT(7)
+#define ADV7511_INT0_VSYNC BIT(5)
+#define ADV7511_INT0_AUDIO_FIFO_FULL BIT(4)
+#define ADV7511_INT0_EDID_READY BIT(2)
+#define ADV7511_INT0_HDCP_AUTHENTICATED BIT(1)
+
+#define ADV7511_INT1_DDC_ERROR BIT(7)
+#define ADV7511_INT1_BKSV BIT(6)
+#define ADV7511_INT1_CEC_TX_READY BIT(5)
+#define ADV7511_INT1_CEC_TX_ARBIT_LOST BIT(4)
+#define ADV7511_INT1_CEC_TX_RETRY_TIMEOUT BIT(3)
+#define ADV7511_INT1_CEC_RX_READY3 BIT(2)
+#define ADV7511_INT1_CEC_RX_READY2 BIT(1)
+#define ADV7511_INT1_CEC_RX_READY1 BIT(0)
+
+#define ADV7511_ARC_CTRL_POWER_DOWN BIT(0)
+
+#define ADV7511_CEC_CTRL_POWER_DOWN BIT(0)
+
+#define ADV7511_POWER_POWER_DOWN BIT(6)
+
+#define ADV7511_HDMI_CFG_MODE_MASK 0x2
+#define ADV7511_HDMI_CFG_MODE_DVI 0x0
+#define ADV7511_HDMI_CFG_MODE_HDMI 0x2
+
+#define ADV7511_AUDIO_SELECT_I2C 0x0
+#define ADV7511_AUDIO_SELECT_SPDIF 0x1
+#define ADV7511_AUDIO_SELECT_DSD 0x2
+#define ADV7511_AUDIO_SELECT_HBR 0x3
+#define ADV7511_AUDIO_SELECT_DST 0x4
+
+#define ADV7511_I2S_SAMPLE_LEN_16 0x2
+#define ADV7511_I2S_SAMPLE_LEN_20 0x3
+#define ADV7511_I2S_SAMPLE_LEN_18 0x4
+#define ADV7511_I2S_SAMPLE_LEN_22 0x5
+#define ADV7511_I2S_SAMPLE_LEN_19 0x8
+#define ADV7511_I2S_SAMPLE_LEN_23 0x9
+#define ADV7511_I2S_SAMPLE_LEN_24 0xb
+#define ADV7511_I2S_SAMPLE_LEN_17 0xc
+#define ADV7511_I2S_SAMPLE_LEN_21 0xd
+
+#define ADV7511_SAMPLE_FREQ_44100 0x0
+#define ADV7511_SAMPLE_FREQ_48000 0x2
+#define ADV7511_SAMPLE_FREQ_32000 0x3
+#define ADV7511_SAMPLE_FREQ_88200 0x8
+#define ADV7511_SAMPLE_FREQ_96000 0xa
+#define ADV7511_SAMPLE_FREQ_176400 0xc
+#define ADV7511_SAMPLE_FREQ_192000 0xe
+
+#define ADV7511_STATUS_POWER_DOWN_POLARITY BIT(7)
+#define ADV7511_STATUS_HPD BIT(6)
+#define ADV7511_STATUS_MONITOR_SENSE BIT(5)
+#define ADV7511_STATUS_I2S_32BIT_MODE BIT(3)
+
+#define ADV7511_PACKET_ENABLE_N_CTS BIT(8+6)
+#define ADV7511_PACKET_ENABLE_AUDIO_SAMPLE BIT(8+5)
+#define ADV7511_PACKET_ENABLE_AVI_INFOFRAME BIT(8+4)
+#define ADV7511_PACKET_ENABLE_AUDIO_INFOFRAME BIT(8+3)
+#define ADV7511_PACKET_ENABLE_GC BIT(7)
+#define ADV7511_PACKET_ENABLE_SPD BIT(6)
+#define ADV7511_PACKET_ENABLE_MPEG BIT(5)
+#define ADV7511_PACKET_ENABLE_ACP BIT(4)
+#define ADV7511_PACKET_ENABLE_ISRC BIT(3)
+#define ADV7511_PACKET_ENABLE_GM BIT(2)
+#define ADV7511_PACKET_ENABLE_SPARE2 BIT(1)
+#define ADV7511_PACKET_ENABLE_SPARE1 BIT(0)
+
+#define ADV7535_REG_POWER2_HPD_OVERRIDE BIT(6)
+#define ADV7511_REG_POWER2_HPD_SRC_MASK 0xc0
+#define ADV7511_REG_POWER2_HPD_SRC_BOTH 0x00
+#define ADV7511_REG_POWER2_HPD_SRC_HPD 0x40
+#define ADV7511_REG_POWER2_HPD_SRC_CEC 0x80
+#define ADV7511_REG_POWER2_HPD_SRC_NONE 0xc0
+#define ADV7511_REG_POWER2_TDMS_ENABLE BIT(4)
+#define ADV7511_REG_POWER2_GATE_INPUT_CLK BIT(0)
+
+#define ADV7511_LOW_REFRESH_RATE_NONE 0x0
+#define ADV7511_LOW_REFRESH_RATE_24HZ 0x1
+#define ADV7511_LOW_REFRESH_RATE_25HZ 0x2
+#define ADV7511_LOW_REFRESH_RATE_30HZ 0x3
+
+#define ADV7511_AUDIO_CFG3_LEN_MASK 0x0f
+#define ADV7511_I2C_FREQ_ID_CFG_RATE_MASK 0xf0
+
+#define ADV7511_AUDIO_SOURCE_I2S 0
+#define ADV7511_AUDIO_SOURCE_SPDIF 1
+
+#define ADV7511_I2S_FORMAT_I2S 0
+#define ADV7511_I2S_FORMAT_RIGHT_J 1
+#define ADV7511_I2S_FORMAT_LEFT_J 2
+#define ADV7511_I2S_IEC958_DIRECT 3
+
+#define ADV7511_PACKET(p, x) ((p) * 0x20 + (x))
+#define ADV7511_PACKET_SDP(x) ADV7511_PACKET(0, x)
+#define ADV7511_PACKET_MPEG(x) ADV7511_PACKET(1, x)
+#define ADV7511_PACKET_ACP(x) ADV7511_PACKET(2, x)
+#define ADV7511_PACKET_ISRC1(x) ADV7511_PACKET(3, x)
+#define ADV7511_PACKET_ISRC2(x) ADV7511_PACKET(4, x)
+#define ADV7511_PACKET_GM(x) ADV7511_PACKET(5, x)
+#define ADV7511_PACKET_SPARE(x) ADV7511_PACKET(6, x)
+
+#define ADV7511_REG_CEC_TX_FRAME_HDR 0x00
+#define ADV7511_REG_CEC_TX_FRAME_DATA0 0x01
+#define ADV7511_REG_CEC_TX_FRAME_LEN 0x10
+#define ADV7511_REG_CEC_TX_ENABLE 0x11
+#define ADV7511_REG_CEC_TX_RETRY 0x12
+#define ADV7511_REG_CEC_TX_LOW_DRV_CNT 0x14
+#define ADV7511_REG_CEC_RX1_FRAME_HDR 0x15
+#define ADV7511_REG_CEC_RX1_FRAME_DATA0 0x16
+#define ADV7511_REG_CEC_RX1_FRAME_LEN 0x25
+#define ADV7511_REG_CEC_RX_STATUS 0x26
+#define ADV7511_REG_CEC_RX2_FRAME_HDR 0x27
+#define ADV7511_REG_CEC_RX2_FRAME_DATA0 0x28
+#define ADV7511_REG_CEC_RX2_FRAME_LEN 0x37
+#define ADV7511_REG_CEC_RX3_FRAME_HDR 0x38
+#define ADV7511_REG_CEC_RX3_FRAME_DATA0 0x39
+#define ADV7511_REG_CEC_RX3_FRAME_LEN 0x48
+#define ADV7511_REG_CEC_RX_BUFFERS 0x4a
+#define ADV7511_REG_CEC_LOG_ADDR_MASK 0x4b
+#define ADV7511_REG_CEC_LOG_ADDR_0_1 0x4c
+#define ADV7511_REG_CEC_LOG_ADDR_2 0x4d
+#define ADV7511_REG_CEC_CLK_DIV 0x4e
+#define ADV7511_REG_CEC_SOFT_RESET 0x50
+
+#define ADV7533_REG_CEC_OFFSET 0x70
+
+enum adv7511_input_clock {
+ ADV7511_INPUT_CLOCK_1X,
+ ADV7511_INPUT_CLOCK_2X,
+ ADV7511_INPUT_CLOCK_DDR,
+};
+
+enum adv7511_input_justification {
+ ADV7511_INPUT_JUSTIFICATION_EVENLY = 0,
+ ADV7511_INPUT_JUSTIFICATION_RIGHT = 1,
+ ADV7511_INPUT_JUSTIFICATION_LEFT = 2,
+};
+
+enum adv7511_input_sync_pulse {
+ ADV7511_INPUT_SYNC_PULSE_DE = 0,
+ ADV7511_INPUT_SYNC_PULSE_HSYNC = 1,
+ ADV7511_INPUT_SYNC_PULSE_VSYNC = 2,
+ ADV7511_INPUT_SYNC_PULSE_NONE = 3,
+};
+
+/**
+ * enum adv7511_sync_polarity - Polarity for the input sync signals
+ * @ADV7511_SYNC_POLARITY_PASSTHROUGH: Sync polarity matches that of
+ * the currently configured mode.
+ * @ADV7511_SYNC_POLARITY_LOW: Sync polarity is low
+ * @ADV7511_SYNC_POLARITY_HIGH: Sync polarity is high
+ *
+ * If the polarity is set to either LOW or HIGH the driver will configure the
+ * ADV7511 to internally invert the sync signal if required to match the sync
+ * polarity setting for the currently selected output mode.
+ *
+ * If the polarity is set to PASSTHROUGH, the ADV7511 will route the signal
+ * unchanged. This is used when the upstream graphics core already generates
+ * the sync signals with the correct polarity.
+ */
+enum adv7511_sync_polarity {
+ ADV7511_SYNC_POLARITY_PASSTHROUGH,
+ ADV7511_SYNC_POLARITY_LOW,
+ ADV7511_SYNC_POLARITY_HIGH,
+};
+
+/**
+ * struct adv7511_link_config - Describes adv7511 hardware configuration
+ * @input_color_depth: Number of bits per color component (8, 10 or 12)
+ * @input_colorspace: The input colorspace (RGB, YUV444, YUV422)
+ * @input_clock: The input video clock style (1x, 2x, DDR)
+ * @input_style: The input component arrangement variant
+ * @input_justification: Video input format bit justification
+ * @clock_delay: Clock delay for the input clock (in ps)
+ * @embedded_sync: Video input uses BT.656-style embedded sync
+ * @sync_pulse: Select the sync pulse
+ * @vsync_polarity: vsync input signal configuration
+ * @hsync_polarity: hsync input signal configuration
+ */
+struct adv7511_link_config {
+ unsigned int input_color_depth;
+ enum hdmi_colorspace input_colorspace;
+ enum adv7511_input_clock input_clock;
+ unsigned int input_style;
+ enum adv7511_input_justification input_justification;
+
+ int clock_delay;
+
+ bool embedded_sync;
+ enum adv7511_input_sync_pulse sync_pulse;
+ enum adv7511_sync_polarity vsync_polarity;
+ enum adv7511_sync_polarity hsync_polarity;
+};
+
+/**
+ * enum adv7511_csc_scaling - Scaling factor for the ADV7511 CSC
+ * @ADV7511_CSC_SCALING_1: CSC results are not scaled
+ * @ADV7511_CSC_SCALING_2: CSC results are scaled by a factor of two
+ * @ADV7511_CSC_SCALING_4: CSC results are scalled by a factor of four
+ */
+enum adv7511_csc_scaling {
+ ADV7511_CSC_SCALING_1 = 0,
+ ADV7511_CSC_SCALING_2 = 1,
+ ADV7511_CSC_SCALING_4 = 2,
+};
+
+/**
+ * struct adv7511_video_config - Describes adv7511 hardware configuration
+ * @csc_enable: Whether to enable color space conversion
+ * @csc_scaling_factor: Color space conversion scaling factor
+ * @csc_coefficents: Color space conversion coefficents
+ * @hdmi_mode: Whether to use HDMI or DVI output mode
+ * @avi_infoframe: HDMI infoframe
+ */
+struct adv7511_video_config {
+ bool csc_enable;
+ enum adv7511_csc_scaling csc_scaling_factor;
+ const uint16_t *csc_coefficents;
+
+ bool hdmi_mode;
+ struct hdmi_avi_infoframe avi_infoframe;
+};
+
+enum adv7511_type {
+ ADV7511,
+ ADV7533,
+ ADV7535,
+};
+
+#define ADV7511_MAX_ADDRS 3
+
+struct adv7511 {
+ struct i2c_client *i2c_main;
+ struct i2c_client *i2c_edid;
+ struct i2c_client *i2c_packet;
+ struct i2c_client *i2c_cec;
+
+ struct regmap *regmap;
+ struct regmap *regmap_cec;
+ unsigned int reg_cec_offset;
+ enum drm_connector_status status;
+ bool powered;
+
+ struct drm_display_mode curr_mode;
+
+ unsigned int f_tmds;
+ unsigned int f_audio;
+ unsigned int audio_source;
+
+ unsigned int current_edid_segment;
+ uint8_t edid_buf[256];
+ bool edid_read;
+
+ wait_queue_head_t wq;
+ struct work_struct hpd_work;
+
+ struct drm_bridge bridge;
+ struct drm_connector connector;
+
+ bool embedded_sync;
+ enum adv7511_sync_polarity vsync_polarity;
+ enum adv7511_sync_polarity hsync_polarity;
+ bool rgb;
+
+ struct gpio_desc *gpio_pd;
+
+ struct regulator_bulk_data *supplies;
+ unsigned int num_supplies;
+
+ /* ADV7533 DSI RX related params */
+ struct device_node *host_node;
+ struct mipi_dsi_device *dsi;
+ u8 num_dsi_lanes;
+ bool use_timing_gen;
+
+ enum adv7511_type type;
+ struct platform_device *audio_pdev;
+
+ struct cec_adapter *cec_adap;
+ u8 cec_addr[ADV7511_MAX_ADDRS];
+ u8 cec_valid_addrs;
+ bool cec_enabled_adap;
+ struct clk *cec_clk;
+ u32 cec_clk_freq;
+};
+
+#ifdef CONFIG_DRM_I2C_ADV7511_CEC
+int adv7511_cec_init(struct device *dev, struct adv7511 *adv7511);
+void adv7511_cec_irq_process(struct adv7511 *adv7511, unsigned int irq1);
+#else
+static inline int adv7511_cec_init(struct device *dev, struct adv7511 *adv7511)
+{
+ regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL,
+ ADV7511_CEC_CTRL_POWER_DOWN);
+ return 0;
+}
+#endif
+
+void adv7533_dsi_power_on(struct adv7511 *adv);
+void adv7533_dsi_power_off(struct adv7511 *adv);
+enum drm_mode_status adv7533_mode_valid(struct adv7511 *adv,
+ const struct drm_display_mode *mode);
+int adv7533_patch_registers(struct adv7511 *adv);
+int adv7533_patch_cec_registers(struct adv7511 *adv);
+int adv7533_attach_dsi(struct adv7511 *adv);
+int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv);
+
+#ifdef CONFIG_DRM_I2C_ADV7511_AUDIO
+int adv7511_audio_init(struct device *dev, struct adv7511 *adv7511);
+void adv7511_audio_exit(struct adv7511 *adv7511);
+#else /*CONFIG_DRM_I2C_ADV7511_AUDIO */
+static inline int adv7511_audio_init(struct device *dev, struct adv7511 *adv7511)
+{
+ return 0;
+}
+static inline void adv7511_audio_exit(struct adv7511 *adv7511)
+{
+}
+#endif /* CONFIG_DRM_I2C_ADV7511_AUDIO */
+
+#endif /* __DRM_I2C_ADV7511_H__ */
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c b/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c
new file mode 100644
index 000000000..61f4a38e7
--- /dev/null
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c
@@ -0,0 +1,256 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Analog Devices ADV7511 HDMI transmitter driver
+ *
+ * Copyright 2012 Analog Devices Inc.
+ * Copyright (c) 2016, Linaro Limited
+ */
+
+#include <sound/core.h>
+#include <sound/hdmi-codec.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <linux/of_graph.h>
+
+#include "adv7511.h"
+
+static void adv7511_calc_cts_n(unsigned int f_tmds, unsigned int fs,
+ unsigned int *cts, unsigned int *n)
+{
+ switch (fs) {
+ case 32000:
+ case 48000:
+ case 96000:
+ case 192000:
+ *n = fs * 128 / 1000;
+ break;
+ case 44100:
+ case 88200:
+ case 176400:
+ *n = fs * 128 / 900;
+ break;
+ }
+
+ *cts = ((f_tmds * *n) / (128 * fs)) * 1000;
+}
+
+static int adv7511_update_cts_n(struct adv7511 *adv7511)
+{
+ unsigned int cts = 0;
+ unsigned int n = 0;
+
+ adv7511_calc_cts_n(adv7511->f_tmds, adv7511->f_audio, &cts, &n);
+
+ regmap_write(adv7511->regmap, ADV7511_REG_N0, (n >> 16) & 0xf);
+ regmap_write(adv7511->regmap, ADV7511_REG_N1, (n >> 8) & 0xff);
+ regmap_write(adv7511->regmap, ADV7511_REG_N2, n & 0xff);
+
+ regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL0,
+ (cts >> 16) & 0xf);
+ regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL1,
+ (cts >> 8) & 0xff);
+ regmap_write(adv7511->regmap, ADV7511_REG_CTS_MANUAL2,
+ cts & 0xff);
+
+ return 0;
+}
+
+static int adv7511_hdmi_hw_params(struct device *dev, void *data,
+ struct hdmi_codec_daifmt *fmt,
+ struct hdmi_codec_params *hparms)
+{
+ struct adv7511 *adv7511 = dev_get_drvdata(dev);
+ unsigned int audio_source, i2s_format = 0;
+ unsigned int invert_clock;
+ unsigned int rate;
+ unsigned int len;
+
+ switch (hparms->sample_rate) {
+ case 32000:
+ rate = ADV7511_SAMPLE_FREQ_32000;
+ break;
+ case 44100:
+ rate = ADV7511_SAMPLE_FREQ_44100;
+ break;
+ case 48000:
+ rate = ADV7511_SAMPLE_FREQ_48000;
+ break;
+ case 88200:
+ rate = ADV7511_SAMPLE_FREQ_88200;
+ break;
+ case 96000:
+ rate = ADV7511_SAMPLE_FREQ_96000;
+ break;
+ case 176400:
+ rate = ADV7511_SAMPLE_FREQ_176400;
+ break;
+ case 192000:
+ rate = ADV7511_SAMPLE_FREQ_192000;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (hparms->sample_width) {
+ case 16:
+ len = ADV7511_I2S_SAMPLE_LEN_16;
+ break;
+ case 18:
+ len = ADV7511_I2S_SAMPLE_LEN_18;
+ break;
+ case 20:
+ len = ADV7511_I2S_SAMPLE_LEN_20;
+ break;
+ case 32:
+ if (fmt->bit_fmt != SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
+ return -EINVAL;
+ fallthrough;
+ case 24:
+ len = ADV7511_I2S_SAMPLE_LEN_24;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt->fmt) {
+ case HDMI_I2S:
+ audio_source = ADV7511_AUDIO_SOURCE_I2S;
+ i2s_format = ADV7511_I2S_FORMAT_I2S;
+ if (fmt->bit_fmt == SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
+ i2s_format = ADV7511_I2S_IEC958_DIRECT;
+ break;
+ case HDMI_RIGHT_J:
+ audio_source = ADV7511_AUDIO_SOURCE_I2S;
+ i2s_format = ADV7511_I2S_FORMAT_RIGHT_J;
+ break;
+ case HDMI_LEFT_J:
+ audio_source = ADV7511_AUDIO_SOURCE_I2S;
+ i2s_format = ADV7511_I2S_FORMAT_LEFT_J;
+ break;
+ case HDMI_SPDIF:
+ audio_source = ADV7511_AUDIO_SOURCE_SPDIF;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ invert_clock = fmt->bit_clk_inv;
+
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_SOURCE, 0x70,
+ audio_source << 4);
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG, BIT(6),
+ invert_clock << 6);
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_I2S_CONFIG, 0x03,
+ i2s_format);
+
+ adv7511->audio_source = audio_source;
+
+ adv7511->f_audio = hparms->sample_rate;
+
+ adv7511_update_cts_n(adv7511);
+
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG3,
+ ADV7511_AUDIO_CFG3_LEN_MASK, len);
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG,
+ ADV7511_I2C_FREQ_ID_CFG_RATE_MASK, rate << 4);
+ regmap_write(adv7511->regmap, 0x73, 0x1);
+
+ return 0;
+}
+
+static int audio_startup(struct device *dev, void *data)
+{
+ struct adv7511 *adv7511 = dev_get_drvdata(dev);
+
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG,
+ BIT(7), 0);
+
+ /* hide Audio infoframe updates */
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_INFOFRAME_UPDATE,
+ BIT(5), BIT(5));
+ /* enable N/CTS, enable Audio sample packets */
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
+ BIT(5), BIT(5));
+ /* enable N/CTS */
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
+ BIT(6), BIT(6));
+ /* not copyrighted */
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG1,
+ BIT(5), BIT(5));
+ /* enable audio infoframes */
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
+ BIT(3), BIT(3));
+ /* AV mute disable */
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(0),
+ BIT(7) | BIT(6), BIT(7));
+ /* use Audio infoframe updated info */
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_GC(1),
+ BIT(5), 0);
+ /* enable SPDIF receiver */
+ if (adv7511->audio_source == ADV7511_AUDIO_SOURCE_SPDIF)
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG,
+ BIT(7), BIT(7));
+
+ return 0;
+}
+
+static void audio_shutdown(struct device *dev, void *data)
+{
+ struct adv7511 *adv7511 = dev_get_drvdata(dev);
+
+ if (adv7511->audio_source == ADV7511_AUDIO_SOURCE_SPDIF)
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG,
+ BIT(7), 0);
+}
+
+static int adv7511_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
+ struct device_node *endpoint)
+{
+ struct of_endpoint of_ep;
+ int ret;
+
+ ret = of_graph_parse_endpoint(endpoint, &of_ep);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * HDMI sound should be located as reg = <2>
+ * Then, it is sound port 0
+ */
+ if (of_ep.port == 2)
+ return 0;
+
+ return -EINVAL;
+}
+
+static const struct hdmi_codec_ops adv7511_codec_ops = {
+ .hw_params = adv7511_hdmi_hw_params,
+ .audio_shutdown = audio_shutdown,
+ .audio_startup = audio_startup,
+ .get_dai_id = adv7511_hdmi_i2s_get_dai_id,
+};
+
+static const struct hdmi_codec_pdata codec_data = {
+ .ops = &adv7511_codec_ops,
+ .max_i2s_channels = 2,
+ .i2s = 1,
+ .spdif = 1,
+};
+
+int adv7511_audio_init(struct device *dev, struct adv7511 *adv7511)
+{
+ adv7511->audio_pdev = platform_device_register_data(dev,
+ HDMI_CODEC_DRV_NAME,
+ PLATFORM_DEVID_AUTO,
+ &codec_data,
+ sizeof(codec_data));
+ return PTR_ERR_OR_ZERO(adv7511->audio_pdev);
+}
+
+void adv7511_audio_exit(struct adv7511 *adv7511)
+{
+ if (adv7511->audio_pdev) {
+ platform_device_unregister(adv7511->audio_pdev);
+ adv7511->audio_pdev = NULL;
+ }
+}
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c b/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c
new file mode 100644
index 000000000..99964f5a5
--- /dev/null
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c
@@ -0,0 +1,392 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * adv7511_cec.c - Analog Devices ADV7511/33 cec driver
+ *
+ * Copyright 2017 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
+
+#include <media/cec.h>
+
+#include "adv7511.h"
+
+static const u8 ADV7511_REG_CEC_RX_FRAME_HDR[] = {
+ ADV7511_REG_CEC_RX1_FRAME_HDR,
+ ADV7511_REG_CEC_RX2_FRAME_HDR,
+ ADV7511_REG_CEC_RX3_FRAME_HDR,
+};
+
+static const u8 ADV7511_REG_CEC_RX_FRAME_LEN[] = {
+ ADV7511_REG_CEC_RX1_FRAME_LEN,
+ ADV7511_REG_CEC_RX2_FRAME_LEN,
+ ADV7511_REG_CEC_RX3_FRAME_LEN,
+};
+
+#define ADV7511_INT1_CEC_MASK \
+ (ADV7511_INT1_CEC_TX_READY | ADV7511_INT1_CEC_TX_ARBIT_LOST | \
+ ADV7511_INT1_CEC_TX_RETRY_TIMEOUT | ADV7511_INT1_CEC_RX_READY1 | \
+ ADV7511_INT1_CEC_RX_READY2 | ADV7511_INT1_CEC_RX_READY3)
+
+static void adv_cec_tx_raw_status(struct adv7511 *adv7511, u8 tx_raw_status)
+{
+ unsigned int offset = adv7511->reg_cec_offset;
+ unsigned int val;
+
+ if (regmap_read(adv7511->regmap_cec,
+ ADV7511_REG_CEC_TX_ENABLE + offset, &val))
+ return;
+
+ if ((val & 0x01) == 0)
+ return;
+
+ if (tx_raw_status & ADV7511_INT1_CEC_TX_ARBIT_LOST) {
+ cec_transmit_attempt_done(adv7511->cec_adap,
+ CEC_TX_STATUS_ARB_LOST);
+ return;
+ }
+ if (tx_raw_status & ADV7511_INT1_CEC_TX_RETRY_TIMEOUT) {
+ u8 status;
+ u8 err_cnt = 0;
+ u8 nack_cnt = 0;
+ u8 low_drive_cnt = 0;
+ unsigned int cnt;
+
+ /*
+ * We set this status bit since this hardware performs
+ * retransmissions.
+ */
+ status = CEC_TX_STATUS_MAX_RETRIES;
+ if (regmap_read(adv7511->regmap_cec,
+ ADV7511_REG_CEC_TX_LOW_DRV_CNT + offset, &cnt)) {
+ err_cnt = 1;
+ status |= CEC_TX_STATUS_ERROR;
+ } else {
+ nack_cnt = cnt & 0xf;
+ if (nack_cnt)
+ status |= CEC_TX_STATUS_NACK;
+ low_drive_cnt = cnt >> 4;
+ if (low_drive_cnt)
+ status |= CEC_TX_STATUS_LOW_DRIVE;
+ }
+ cec_transmit_done(adv7511->cec_adap, status,
+ 0, nack_cnt, low_drive_cnt, err_cnt);
+ return;
+ }
+ if (tx_raw_status & ADV7511_INT1_CEC_TX_READY) {
+ cec_transmit_attempt_done(adv7511->cec_adap, CEC_TX_STATUS_OK);
+ return;
+ }
+}
+
+static void adv7511_cec_rx(struct adv7511 *adv7511, int rx_buf)
+{
+ unsigned int offset = adv7511->reg_cec_offset;
+ struct cec_msg msg = {};
+ unsigned int len;
+ unsigned int val;
+ u8 i;
+
+ if (regmap_read(adv7511->regmap_cec,
+ ADV7511_REG_CEC_RX_FRAME_LEN[rx_buf] + offset, &len))
+ return;
+
+ msg.len = len & 0x1f;
+
+ if (msg.len > 16)
+ msg.len = 16;
+
+ if (!msg.len)
+ return;
+
+ for (i = 0; i < msg.len; i++) {
+ regmap_read(adv7511->regmap_cec,
+ i + ADV7511_REG_CEC_RX_FRAME_HDR[rx_buf] + offset,
+ &val);
+ msg.msg[i] = val;
+ }
+
+ /* Toggle RX Ready Clear bit to re-enable this RX buffer */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_RX_BUFFERS + offset, BIT(rx_buf),
+ BIT(rx_buf));
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_RX_BUFFERS + offset, BIT(rx_buf), 0);
+
+ cec_received_msg(adv7511->cec_adap, &msg);
+}
+
+void adv7511_cec_irq_process(struct adv7511 *adv7511, unsigned int irq1)
+{
+ unsigned int offset = adv7511->reg_cec_offset;
+ const u32 irq_tx_mask = ADV7511_INT1_CEC_TX_READY |
+ ADV7511_INT1_CEC_TX_ARBIT_LOST |
+ ADV7511_INT1_CEC_TX_RETRY_TIMEOUT;
+ const u32 irq_rx_mask = ADV7511_INT1_CEC_RX_READY1 |
+ ADV7511_INT1_CEC_RX_READY2 |
+ ADV7511_INT1_CEC_RX_READY3;
+ unsigned int rx_status;
+ int rx_order[3] = { -1, -1, -1 };
+ int i;
+
+ if (irq1 & irq_tx_mask)
+ adv_cec_tx_raw_status(adv7511, irq1);
+
+ if (!(irq1 & irq_rx_mask))
+ return;
+
+ if (regmap_read(adv7511->regmap_cec,
+ ADV7511_REG_CEC_RX_STATUS + offset, &rx_status))
+ return;
+
+ /*
+ * ADV7511_REG_CEC_RX_STATUS[5:0] contains the reception order of RX
+ * buffers 0, 1, and 2 in bits [1:0], [3:2], and [5:4] respectively.
+ * The values are to be interpreted as follows:
+ *
+ * 0 = buffer unused
+ * 1 = buffer contains oldest received frame (if applicable)
+ * 2 = buffer contains second oldest received frame (if applicable)
+ * 3 = buffer contains third oldest received frame (if applicable)
+ *
+ * Fill rx_order with the sequence of RX buffer indices to
+ * read from in order, where -1 indicates that there are no
+ * more buffers to process.
+ */
+ for (i = 0; i < 3; i++) {
+ unsigned int timestamp = (rx_status >> (2 * i)) & 0x3;
+
+ if (timestamp)
+ rx_order[timestamp - 1] = i;
+ }
+
+ /* Read CEC RX buffers in the appropriate order as prescribed above */
+ for (i = 0; i < 3; i++) {
+ int rx_buf = rx_order[i];
+
+ if (rx_buf < 0)
+ break;
+
+ adv7511_cec_rx(adv7511, rx_buf);
+ }
+}
+
+static int adv7511_cec_adap_enable(struct cec_adapter *adap, bool enable)
+{
+ struct adv7511 *adv7511 = cec_get_drvdata(adap);
+ unsigned int offset = adv7511->reg_cec_offset;
+
+ if (adv7511->i2c_cec == NULL)
+ return -EIO;
+
+ if (!adv7511->cec_enabled_adap && enable) {
+ /* power up cec section */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_CLK_DIV + offset,
+ 0x03, 0x01);
+ /* non-legacy mode and clear all rx buffers */
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_RX_BUFFERS + offset, 0x0f);
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_RX_BUFFERS + offset, 0x08);
+ /* initially disable tx */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_TX_ENABLE + offset, 1, 0);
+ /* enabled irqs: */
+ /* tx: ready */
+ /* tx: arbitration lost */
+ /* tx: retry timeout */
+ /* rx: ready 1-3 */
+ regmap_update_bits(adv7511->regmap,
+ ADV7511_REG_INT_ENABLE(1), 0x3f,
+ ADV7511_INT1_CEC_MASK);
+ } else if (adv7511->cec_enabled_adap && !enable) {
+ regmap_update_bits(adv7511->regmap,
+ ADV7511_REG_INT_ENABLE(1), 0x3f, 0);
+ /* disable address mask 1-3 */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_LOG_ADDR_MASK + offset,
+ 0x70, 0x00);
+ /* power down cec section */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_CLK_DIV + offset,
+ 0x03, 0x00);
+ adv7511->cec_valid_addrs = 0;
+ }
+ adv7511->cec_enabled_adap = enable;
+ return 0;
+}
+
+static int adv7511_cec_adap_log_addr(struct cec_adapter *adap, u8 addr)
+{
+ struct adv7511 *adv7511 = cec_get_drvdata(adap);
+ unsigned int offset = adv7511->reg_cec_offset;
+ unsigned int i, free_idx = ADV7511_MAX_ADDRS;
+
+ if (!adv7511->cec_enabled_adap)
+ return addr == CEC_LOG_ADDR_INVALID ? 0 : -EIO;
+
+ if (addr == CEC_LOG_ADDR_INVALID) {
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_LOG_ADDR_MASK + offset,
+ 0x70, 0);
+ adv7511->cec_valid_addrs = 0;
+ return 0;
+ }
+
+ for (i = 0; i < ADV7511_MAX_ADDRS; i++) {
+ bool is_valid = adv7511->cec_valid_addrs & (1 << i);
+
+ if (free_idx == ADV7511_MAX_ADDRS && !is_valid)
+ free_idx = i;
+ if (is_valid && adv7511->cec_addr[i] == addr)
+ return 0;
+ }
+ if (i == ADV7511_MAX_ADDRS) {
+ i = free_idx;
+ if (i == ADV7511_MAX_ADDRS)
+ return -ENXIO;
+ }
+ adv7511->cec_addr[i] = addr;
+ adv7511->cec_valid_addrs |= 1 << i;
+
+ switch (i) {
+ case 0:
+ /* enable address mask 0 */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_LOG_ADDR_MASK + offset,
+ 0x10, 0x10);
+ /* set address for mask 0 */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_LOG_ADDR_0_1 + offset,
+ 0x0f, addr);
+ break;
+ case 1:
+ /* enable address mask 1 */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_LOG_ADDR_MASK + offset,
+ 0x20, 0x20);
+ /* set address for mask 1 */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_LOG_ADDR_0_1 + offset,
+ 0xf0, addr << 4);
+ break;
+ case 2:
+ /* enable address mask 2 */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_LOG_ADDR_MASK + offset,
+ 0x40, 0x40);
+ /* set address for mask 1 */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_LOG_ADDR_2 + offset,
+ 0x0f, addr);
+ break;
+ }
+ return 0;
+}
+
+static int adv7511_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
+ u32 signal_free_time, struct cec_msg *msg)
+{
+ struct adv7511 *adv7511 = cec_get_drvdata(adap);
+ unsigned int offset = adv7511->reg_cec_offset;
+ u8 len = msg->len;
+ unsigned int i;
+
+ /*
+ * The number of retries is the number of attempts - 1, but retry
+ * at least once. It's not clear if a value of 0 is allowed, so
+ * let's do at least one retry.
+ */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_TX_RETRY + offset,
+ 0x70, max(1, attempts - 1) << 4);
+
+ /* blocking, clear cec tx irq status */
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_INT(1), 0x38, 0x38);
+
+ /* write data */
+ for (i = 0; i < len; i++)
+ regmap_write(adv7511->regmap_cec,
+ i + ADV7511_REG_CEC_TX_FRAME_HDR + offset,
+ msg->msg[i]);
+
+ /* set length (data + header) */
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_TX_FRAME_LEN + offset, len);
+ /* start transmit, enable tx */
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_TX_ENABLE + offset, 0x01);
+ return 0;
+}
+
+static const struct cec_adap_ops adv7511_cec_adap_ops = {
+ .adap_enable = adv7511_cec_adap_enable,
+ .adap_log_addr = adv7511_cec_adap_log_addr,
+ .adap_transmit = adv7511_cec_adap_transmit,
+};
+
+static int adv7511_cec_parse_dt(struct device *dev, struct adv7511 *adv7511)
+{
+ adv7511->cec_clk = devm_clk_get(dev, "cec");
+ if (IS_ERR(adv7511->cec_clk)) {
+ int ret = PTR_ERR(adv7511->cec_clk);
+
+ adv7511->cec_clk = NULL;
+ return ret;
+ }
+ clk_prepare_enable(adv7511->cec_clk);
+ adv7511->cec_clk_freq = clk_get_rate(adv7511->cec_clk);
+ return 0;
+}
+
+int adv7511_cec_init(struct device *dev, struct adv7511 *adv7511)
+{
+ unsigned int offset = adv7511->reg_cec_offset;
+ int ret = adv7511_cec_parse_dt(dev, adv7511);
+
+ if (ret)
+ goto err_cec_parse_dt;
+
+ adv7511->cec_adap = cec_allocate_adapter(&adv7511_cec_adap_ops,
+ adv7511, dev_name(dev), CEC_CAP_DEFAULTS, ADV7511_MAX_ADDRS);
+ if (IS_ERR(adv7511->cec_adap)) {
+ ret = PTR_ERR(adv7511->cec_adap);
+ goto err_cec_alloc;
+ }
+
+ regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL, 0);
+ /* cec soft reset */
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_SOFT_RESET + offset, 0x01);
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_SOFT_RESET + offset, 0x00);
+
+ /* non-legacy mode - use all three RX buffers */
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_RX_BUFFERS + offset, 0x08);
+
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_CLK_DIV + offset,
+ ((adv7511->cec_clk_freq / 750000) - 1) << 2);
+
+ ret = cec_register_adapter(adv7511->cec_adap, dev);
+ if (ret)
+ goto err_cec_register;
+ return 0;
+
+err_cec_register:
+ cec_delete_adapter(adv7511->cec_adap);
+ adv7511->cec_adap = NULL;
+err_cec_alloc:
+ dev_info(dev, "Initializing CEC failed with error %d, disabling CEC\n",
+ ret);
+err_cec_parse_dt:
+ regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL,
+ ADV7511_CEC_CTRL_POWER_DOWN);
+ return ret == -EPROBE_DEFER ? ret : 0;
+}
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
new file mode 100644
index 000000000..9f9874acf
--- /dev/null
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -0,0 +1,1437 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Analog Devices ADV7511 HDMI transmitter driver
+ *
+ * Copyright 2012 Analog Devices Inc.
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/slab.h>
+
+#include <media/cec.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include "adv7511.h"
+
+/* ADI recommended values for proper operation. */
+static const struct reg_sequence adv7511_fixed_registers[] = {
+ { 0x98, 0x03 },
+ { 0x9a, 0xe0 },
+ { 0x9c, 0x30 },
+ { 0x9d, 0x61 },
+ { 0xa2, 0xa4 },
+ { 0xa3, 0xa4 },
+ { 0xe0, 0xd0 },
+ { 0xf9, 0x00 },
+ { 0x55, 0x02 },
+};
+
+/* -----------------------------------------------------------------------------
+ * Register access
+ */
+
+static const uint8_t adv7511_register_defaults[] = {
+ 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00 */
+ 0x00, 0x00, 0x01, 0x0e, 0xbc, 0x18, 0x01, 0x13,
+ 0x25, 0x37, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10 */
+ 0x46, 0x62, 0x04, 0xa8, 0x00, 0x00, 0x1c, 0x84,
+ 0x1c, 0xbf, 0x04, 0xa8, 0x1e, 0x70, 0x02, 0x1e, /* 20 */
+ 0x00, 0x00, 0x04, 0xa8, 0x08, 0x12, 0x1b, 0xac,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 30 */
+ 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0xb0,
+ 0x00, 0x50, 0x90, 0x7e, 0x79, 0x70, 0x00, 0x00, /* 40 */
+ 0x00, 0xa8, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x02, 0x0d, 0x00, 0x00, 0x00, 0x00, /* 50 */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 60 */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x01, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 70 */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 80 */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, /* 90 */
+ 0x0b, 0x02, 0x00, 0x18, 0x5a, 0x60, 0x00, 0x00,
+ 0x00, 0x00, 0x80, 0x80, 0x08, 0x04, 0x00, 0x00, /* a0 */
+ 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x40, 0x14,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* b0 */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* c0 */
+ 0x00, 0x03, 0x00, 0x00, 0x02, 0x00, 0x01, 0x04,
+ 0x30, 0xff, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, /* d0 */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x01,
+ 0x80, 0x75, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, /* e0 */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x11, 0x00, /* f0 */
+ 0x00, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+};
+
+static bool adv7511_register_volatile(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case ADV7511_REG_CHIP_REVISION:
+ case ADV7511_REG_SPDIF_FREQ:
+ case ADV7511_REG_CTS_AUTOMATIC1:
+ case ADV7511_REG_CTS_AUTOMATIC2:
+ case ADV7511_REG_VIC_DETECTED:
+ case ADV7511_REG_VIC_SEND:
+ case ADV7511_REG_AUX_VIC_DETECTED:
+ case ADV7511_REG_STATUS:
+ case ADV7511_REG_GC(1):
+ case ADV7511_REG_INT(0):
+ case ADV7511_REG_INT(1):
+ case ADV7511_REG_PLL_STATUS:
+ case ADV7511_REG_AN(0):
+ case ADV7511_REG_AN(1):
+ case ADV7511_REG_AN(2):
+ case ADV7511_REG_AN(3):
+ case ADV7511_REG_AN(4):
+ case ADV7511_REG_AN(5):
+ case ADV7511_REG_AN(6):
+ case ADV7511_REG_AN(7):
+ case ADV7511_REG_HDCP_STATUS:
+ case ADV7511_REG_BCAPS:
+ case ADV7511_REG_BKSV(0):
+ case ADV7511_REG_BKSV(1):
+ case ADV7511_REG_BKSV(2):
+ case ADV7511_REG_BKSV(3):
+ case ADV7511_REG_BKSV(4):
+ case ADV7511_REG_DDC_STATUS:
+ case ADV7511_REG_EDID_READ_CTRL:
+ case ADV7511_REG_BSTATUS(0):
+ case ADV7511_REG_BSTATUS(1):
+ case ADV7511_REG_CHIP_ID_HIGH:
+ case ADV7511_REG_CHIP_ID_LOW:
+ return true;
+ }
+
+ return false;
+}
+
+static const struct regmap_config adv7511_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = 0xff,
+ .cache_type = REGCACHE_RBTREE,
+ .reg_defaults_raw = adv7511_register_defaults,
+ .num_reg_defaults_raw = ARRAY_SIZE(adv7511_register_defaults),
+
+ .volatile_reg = adv7511_register_volatile,
+};
+
+/* -----------------------------------------------------------------------------
+ * Hardware configuration
+ */
+
+static void adv7511_set_colormap(struct adv7511 *adv7511, bool enable,
+ const uint16_t *coeff,
+ unsigned int scaling_factor)
+{
+ unsigned int i;
+
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
+ ADV7511_CSC_UPDATE_MODE, ADV7511_CSC_UPDATE_MODE);
+
+ if (enable) {
+ for (i = 0; i < 12; ++i) {
+ regmap_update_bits(adv7511->regmap,
+ ADV7511_REG_CSC_UPPER(i),
+ 0x1f, coeff[i] >> 8);
+ regmap_write(adv7511->regmap,
+ ADV7511_REG_CSC_LOWER(i),
+ coeff[i] & 0xff);
+ }
+ }
+
+ if (enable)
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
+ 0xe0, 0x80 | (scaling_factor << 5));
+ else
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(0),
+ 0x80, 0x00);
+
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_CSC_UPPER(1),
+ ADV7511_CSC_UPDATE_MODE, 0);
+}
+
+static int adv7511_packet_enable(struct adv7511 *adv7511, unsigned int packet)
+{
+ if (packet & 0xff)
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
+ packet, 0xff);
+
+ if (packet & 0xff00) {
+ packet >>= 8;
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
+ packet, 0xff);
+ }
+
+ return 0;
+}
+
+static int adv7511_packet_disable(struct adv7511 *adv7511, unsigned int packet)
+{
+ if (packet & 0xff)
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE0,
+ packet, 0x00);
+
+ if (packet & 0xff00) {
+ packet >>= 8;
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_PACKET_ENABLE1,
+ packet, 0x00);
+ }
+
+ return 0;
+}
+
+/* Coefficients for adv7511 color space conversion */
+static const uint16_t adv7511_csc_ycbcr_to_rgb[] = {
+ 0x0734, 0x04ad, 0x0000, 0x1c1b,
+ 0x1ddc, 0x04ad, 0x1f24, 0x0135,
+ 0x0000, 0x04ad, 0x087c, 0x1b77,
+};
+
+static void adv7511_set_config_csc(struct adv7511 *adv7511,
+ struct drm_connector *connector,
+ bool rgb, bool hdmi_mode)
+{
+ struct adv7511_video_config config;
+ bool output_format_422, output_format_ycbcr;
+ unsigned int mode;
+ uint8_t infoframe[17];
+
+ config.hdmi_mode = hdmi_mode;
+
+ hdmi_avi_infoframe_init(&config.avi_infoframe);
+
+ config.avi_infoframe.scan_mode = HDMI_SCAN_MODE_UNDERSCAN;
+
+ if (rgb) {
+ config.csc_enable = false;
+ config.avi_infoframe.colorspace = HDMI_COLORSPACE_RGB;
+ } else {
+ config.csc_scaling_factor = ADV7511_CSC_SCALING_4;
+ config.csc_coefficents = adv7511_csc_ycbcr_to_rgb;
+
+ if ((connector->display_info.color_formats &
+ DRM_COLOR_FORMAT_YCBCR422) &&
+ config.hdmi_mode) {
+ config.csc_enable = false;
+ config.avi_infoframe.colorspace =
+ HDMI_COLORSPACE_YUV422;
+ } else {
+ config.csc_enable = true;
+ config.avi_infoframe.colorspace = HDMI_COLORSPACE_RGB;
+ }
+ }
+
+ if (config.hdmi_mode) {
+ mode = ADV7511_HDMI_CFG_MODE_HDMI;
+
+ switch (config.avi_infoframe.colorspace) {
+ case HDMI_COLORSPACE_YUV444:
+ output_format_422 = false;
+ output_format_ycbcr = true;
+ break;
+ case HDMI_COLORSPACE_YUV422:
+ output_format_422 = true;
+ output_format_ycbcr = true;
+ break;
+ default:
+ output_format_422 = false;
+ output_format_ycbcr = false;
+ break;
+ }
+ } else {
+ mode = ADV7511_HDMI_CFG_MODE_DVI;
+ output_format_422 = false;
+ output_format_ycbcr = false;
+ }
+
+ adv7511_packet_disable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME);
+
+ adv7511_set_colormap(adv7511, config.csc_enable,
+ config.csc_coefficents,
+ config.csc_scaling_factor);
+
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG1, 0x81,
+ (output_format_422 << 7) | output_format_ycbcr);
+
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_HDCP_HDMI_CFG,
+ ADV7511_HDMI_CFG_MODE_MASK, mode);
+
+ hdmi_avi_infoframe_pack(&config.avi_infoframe, infoframe,
+ sizeof(infoframe));
+
+ /* The AVI infoframe id is not configurable */
+ regmap_bulk_write(adv7511->regmap, ADV7511_REG_AVI_INFOFRAME_VERSION,
+ infoframe + 1, sizeof(infoframe) - 1);
+
+ adv7511_packet_enable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME);
+}
+
+static void adv7511_set_link_config(struct adv7511 *adv7511,
+ const struct adv7511_link_config *config)
+{
+ /*
+ * The input style values documented in the datasheet don't match the
+ * hardware register field values :-(
+ */
+ static const unsigned int input_styles[4] = { 0, 2, 1, 3 };
+
+ unsigned int clock_delay;
+ unsigned int color_depth;
+ unsigned int input_id;
+
+ clock_delay = (config->clock_delay + 1200) / 400;
+ color_depth = config->input_color_depth == 8 ? 3
+ : (config->input_color_depth == 10 ? 1 : 2);
+
+ /* TODO Support input ID 6 */
+ if (config->input_colorspace != HDMI_COLORSPACE_YUV422)
+ input_id = config->input_clock == ADV7511_INPUT_CLOCK_DDR
+ ? 5 : 0;
+ else if (config->input_clock == ADV7511_INPUT_CLOCK_DDR)
+ input_id = config->embedded_sync ? 8 : 7;
+ else if (config->input_clock == ADV7511_INPUT_CLOCK_2X)
+ input_id = config->embedded_sync ? 4 : 3;
+ else
+ input_id = config->embedded_sync ? 2 : 1;
+
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG, 0xf,
+ input_id);
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG1, 0x7e,
+ (color_depth << 4) |
+ (input_styles[config->input_style] << 2));
+ regmap_write(adv7511->regmap, ADV7511_REG_VIDEO_INPUT_CFG2,
+ config->input_justification << 3);
+ regmap_write(adv7511->regmap, ADV7511_REG_TIMING_GEN_SEQ,
+ config->sync_pulse << 2);
+
+ regmap_write(adv7511->regmap, 0xba, clock_delay << 5);
+
+ adv7511->embedded_sync = config->embedded_sync;
+ adv7511->hsync_polarity = config->hsync_polarity;
+ adv7511->vsync_polarity = config->vsync_polarity;
+ adv7511->rgb = config->input_colorspace == HDMI_COLORSPACE_RGB;
+}
+
+static void __adv7511_power_on(struct adv7511 *adv7511)
+{
+ adv7511->current_edid_segment = -1;
+
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
+ ADV7511_POWER_POWER_DOWN, 0);
+ if (adv7511->i2c_main->irq) {
+ /*
+ * Documentation says the INT_ENABLE registers are reset in
+ * POWER_DOWN mode. My 7511w preserved the bits, however.
+ * Still, let's be safe and stick to the documentation.
+ */
+ regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0),
+ ADV7511_INT0_EDID_READY | ADV7511_INT0_HPD);
+ regmap_update_bits(adv7511->regmap,
+ ADV7511_REG_INT_ENABLE(1),
+ ADV7511_INT1_DDC_ERROR,
+ ADV7511_INT1_DDC_ERROR);
+ }
+
+ /*
+ * Per spec it is allowed to pulse the HPD signal to indicate that the
+ * EDID information has changed. Some monitors do this when they wakeup
+ * from standby or are enabled. When the HPD goes low the adv7511 is
+ * reset and the outputs are disabled which might cause the monitor to
+ * go to standby again. To avoid this we ignore the HPD pin for the
+ * first few seconds after enabling the output. On the other hand
+ * adv7535 require to enable HPD Override bit for proper HPD.
+ */
+ if (adv7511->type == ADV7535)
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
+ ADV7535_REG_POWER2_HPD_OVERRIDE,
+ ADV7535_REG_POWER2_HPD_OVERRIDE);
+ else
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
+ ADV7511_REG_POWER2_HPD_SRC_MASK,
+ ADV7511_REG_POWER2_HPD_SRC_NONE);
+}
+
+static void adv7511_power_on(struct adv7511 *adv7511)
+{
+ __adv7511_power_on(adv7511);
+
+ /*
+ * Most of the registers are reset during power down or when HPD is low.
+ */
+ regcache_sync(adv7511->regmap);
+
+ if (adv7511->type == ADV7533 || adv7511->type == ADV7535)
+ adv7533_dsi_power_on(adv7511);
+ adv7511->powered = true;
+}
+
+static void __adv7511_power_off(struct adv7511 *adv7511)
+{
+ /* TODO: setup additional power down modes */
+ if (adv7511->type == ADV7535)
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
+ ADV7535_REG_POWER2_HPD_OVERRIDE, 0);
+
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
+ ADV7511_POWER_POWER_DOWN,
+ ADV7511_POWER_POWER_DOWN);
+ regmap_update_bits(adv7511->regmap,
+ ADV7511_REG_INT_ENABLE(1),
+ ADV7511_INT1_DDC_ERROR, 0);
+ regcache_mark_dirty(adv7511->regmap);
+}
+
+static void adv7511_power_off(struct adv7511 *adv7511)
+{
+ __adv7511_power_off(adv7511);
+ if (adv7511->type == ADV7533 || adv7511->type == ADV7535)
+ adv7533_dsi_power_off(adv7511);
+ adv7511->powered = false;
+}
+
+/* -----------------------------------------------------------------------------
+ * Interrupt and hotplug detection
+ */
+
+static bool adv7511_hpd(struct adv7511 *adv7511)
+{
+ unsigned int irq0;
+ int ret;
+
+ ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
+ if (ret < 0)
+ return false;
+
+ if (irq0 & ADV7511_INT0_HPD) {
+ regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
+ ADV7511_INT0_HPD);
+ return true;
+ }
+
+ return false;
+}
+
+static void adv7511_hpd_work(struct work_struct *work)
+{
+ struct adv7511 *adv7511 = container_of(work, struct adv7511, hpd_work);
+ enum drm_connector_status status;
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val);
+ if (ret < 0)
+ status = connector_status_disconnected;
+ else if (val & ADV7511_STATUS_HPD)
+ status = connector_status_connected;
+ else
+ status = connector_status_disconnected;
+
+ /*
+ * The bridge resets its registers on unplug. So when we get a plug
+ * event and we're already supposed to be powered, cycle the bridge to
+ * restore its state.
+ */
+ if (status == connector_status_connected &&
+ adv7511->connector.status == connector_status_disconnected &&
+ adv7511->powered) {
+ regcache_mark_dirty(adv7511->regmap);
+ adv7511_power_on(adv7511);
+ }
+
+ if (adv7511->connector.status != status) {
+ adv7511->connector.status = status;
+
+ if (adv7511->connector.dev) {
+ if (status == connector_status_disconnected)
+ cec_phys_addr_invalidate(adv7511->cec_adap);
+ drm_kms_helper_hotplug_event(adv7511->connector.dev);
+ } else {
+ drm_bridge_hpd_notify(&adv7511->bridge, status);
+ }
+ }
+}
+
+static int adv7511_irq_process(struct adv7511 *adv7511, bool process_hpd)
+{
+ unsigned int irq0, irq1;
+ int ret;
+
+ ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(0), &irq0);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_read(adv7511->regmap, ADV7511_REG_INT(1), &irq1);
+ if (ret < 0)
+ return ret;
+
+ regmap_write(adv7511->regmap, ADV7511_REG_INT(0), irq0);
+ regmap_write(adv7511->regmap, ADV7511_REG_INT(1), irq1);
+
+ if (process_hpd && irq0 & ADV7511_INT0_HPD && adv7511->bridge.encoder)
+ schedule_work(&adv7511->hpd_work);
+
+ if (irq0 & ADV7511_INT0_EDID_READY || irq1 & ADV7511_INT1_DDC_ERROR) {
+ adv7511->edid_read = true;
+
+ if (adv7511->i2c_main->irq)
+ wake_up_all(&adv7511->wq);
+ }
+
+#ifdef CONFIG_DRM_I2C_ADV7511_CEC
+ adv7511_cec_irq_process(adv7511, irq1);
+#endif
+
+ return 0;
+}
+
+static irqreturn_t adv7511_irq_handler(int irq, void *devid)
+{
+ struct adv7511 *adv7511 = devid;
+ int ret;
+
+ ret = adv7511_irq_process(adv7511, true);
+ return ret < 0 ? IRQ_NONE : IRQ_HANDLED;
+}
+
+/* -----------------------------------------------------------------------------
+ * EDID retrieval
+ */
+
+static int adv7511_wait_for_edid(struct adv7511 *adv7511, int timeout)
+{
+ int ret;
+
+ if (adv7511->i2c_main->irq) {
+ ret = wait_event_interruptible_timeout(adv7511->wq,
+ adv7511->edid_read, msecs_to_jiffies(timeout));
+ } else {
+ for (; timeout > 0; timeout -= 25) {
+ ret = adv7511_irq_process(adv7511, false);
+ if (ret < 0)
+ break;
+
+ if (adv7511->edid_read)
+ break;
+
+ msleep(25);
+ }
+ }
+
+ return adv7511->edid_read ? 0 : -EIO;
+}
+
+static int adv7511_get_edid_block(void *data, u8 *buf, unsigned int block,
+ size_t len)
+{
+ struct adv7511 *adv7511 = data;
+ struct i2c_msg xfer[2];
+ uint8_t offset;
+ unsigned int i;
+ int ret;
+
+ if (len > 128)
+ return -EINVAL;
+
+ if (adv7511->current_edid_segment != block / 2) {
+ unsigned int status;
+
+ ret = regmap_read(adv7511->regmap, ADV7511_REG_DDC_STATUS,
+ &status);
+ if (ret < 0)
+ return ret;
+
+ if (status != 2) {
+ adv7511->edid_read = false;
+ regmap_write(adv7511->regmap, ADV7511_REG_EDID_SEGMENT,
+ block);
+ ret = adv7511_wait_for_edid(adv7511, 200);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Break this apart, hopefully more I2C controllers will
+ * support 64 byte transfers than 256 byte transfers
+ */
+
+ xfer[0].addr = adv7511->i2c_edid->addr;
+ xfer[0].flags = 0;
+ xfer[0].len = 1;
+ xfer[0].buf = &offset;
+ xfer[1].addr = adv7511->i2c_edid->addr;
+ xfer[1].flags = I2C_M_RD;
+ xfer[1].len = 64;
+ xfer[1].buf = adv7511->edid_buf;
+
+ offset = 0;
+
+ for (i = 0; i < 4; ++i) {
+ ret = i2c_transfer(adv7511->i2c_edid->adapter, xfer,
+ ARRAY_SIZE(xfer));
+ if (ret < 0)
+ return ret;
+ else if (ret != 2)
+ return -EIO;
+
+ xfer[1].buf += 64;
+ offset += 64;
+ }
+
+ adv7511->current_edid_segment = block / 2;
+ }
+
+ if (block % 2 == 0)
+ memcpy(buf, adv7511->edid_buf, len);
+ else
+ memcpy(buf, adv7511->edid_buf + 128, len);
+
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * ADV75xx helpers
+ */
+
+static struct edid *adv7511_get_edid(struct adv7511 *adv7511,
+ struct drm_connector *connector)
+{
+ struct edid *edid;
+
+ /* Reading the EDID only works if the device is powered */
+ if (!adv7511->powered) {
+ unsigned int edid_i2c_addr =
+ (adv7511->i2c_edid->addr << 1);
+
+ __adv7511_power_on(adv7511);
+
+ /* Reset the EDID_I2C_ADDR register as it might be cleared */
+ regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR,
+ edid_i2c_addr);
+ }
+
+ edid = drm_do_get_edid(connector, adv7511_get_edid_block, adv7511);
+
+ if (!adv7511->powered)
+ __adv7511_power_off(adv7511);
+
+ adv7511_set_config_csc(adv7511, connector, adv7511->rgb,
+ drm_detect_hdmi_monitor(edid));
+
+ cec_s_phys_addr_from_edid(adv7511->cec_adap, edid);
+
+ return edid;
+}
+
+static int adv7511_get_modes(struct adv7511 *adv7511,
+ struct drm_connector *connector)
+{
+ struct edid *edid;
+ unsigned int count;
+
+ edid = adv7511_get_edid(adv7511, connector);
+
+ drm_connector_update_edid_property(connector, edid);
+ count = drm_add_edid_modes(connector, edid);
+
+ kfree(edid);
+
+ return count;
+}
+
+static enum drm_connector_status
+adv7511_detect(struct adv7511 *adv7511, struct drm_connector *connector)
+{
+ enum drm_connector_status status;
+ unsigned int val;
+ bool hpd;
+ int ret;
+
+ ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val);
+ if (ret < 0)
+ return connector_status_disconnected;
+
+ if (val & ADV7511_STATUS_HPD)
+ status = connector_status_connected;
+ else
+ status = connector_status_disconnected;
+
+ hpd = adv7511_hpd(adv7511);
+
+ /* The chip resets itself when the cable is disconnected, so in case
+ * there is a pending HPD interrupt and the cable is connected there was
+ * at least one transition from disconnected to connected and the chip
+ * has to be reinitialized. */
+ if (status == connector_status_connected && hpd && adv7511->powered) {
+ regcache_mark_dirty(adv7511->regmap);
+ adv7511_power_on(adv7511);
+ if (connector)
+ adv7511_get_modes(adv7511, connector);
+ if (adv7511->status == connector_status_connected)
+ status = connector_status_disconnected;
+ } else {
+ /* Renable HPD sensing */
+ if (adv7511->type == ADV7535)
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
+ ADV7535_REG_POWER2_HPD_OVERRIDE,
+ ADV7535_REG_POWER2_HPD_OVERRIDE);
+ else
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER2,
+ ADV7511_REG_POWER2_HPD_SRC_MASK,
+ ADV7511_REG_POWER2_HPD_SRC_BOTH);
+ }
+
+ adv7511->status = status;
+ return status;
+}
+
+static enum drm_mode_status adv7511_mode_valid(struct adv7511 *adv7511,
+ const struct drm_display_mode *mode)
+{
+ if (mode->clock > 165000)
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
+}
+
+static void adv7511_mode_set(struct adv7511 *adv7511,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adj_mode)
+{
+ unsigned int low_refresh_rate;
+ unsigned int hsync_polarity = 0;
+ unsigned int vsync_polarity = 0;
+
+ if (adv7511->embedded_sync) {
+ unsigned int hsync_offset, hsync_len;
+ unsigned int vsync_offset, vsync_len;
+
+ hsync_offset = adj_mode->crtc_hsync_start -
+ adj_mode->crtc_hdisplay;
+ vsync_offset = adj_mode->crtc_vsync_start -
+ adj_mode->crtc_vdisplay;
+ hsync_len = adj_mode->crtc_hsync_end -
+ adj_mode->crtc_hsync_start;
+ vsync_len = adj_mode->crtc_vsync_end -
+ adj_mode->crtc_vsync_start;
+
+ /* The hardware vsync generator has a off-by-one bug */
+ vsync_offset += 1;
+
+ regmap_write(adv7511->regmap, ADV7511_REG_HSYNC_PLACEMENT_MSB,
+ ((hsync_offset >> 10) & 0x7) << 5);
+ regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(0),
+ (hsync_offset >> 2) & 0xff);
+ regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(1),
+ ((hsync_offset & 0x3) << 6) |
+ ((hsync_len >> 4) & 0x3f));
+ regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(2),
+ ((hsync_len & 0xf) << 4) |
+ ((vsync_offset >> 6) & 0xf));
+ regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(3),
+ ((vsync_offset & 0x3f) << 2) |
+ ((vsync_len >> 8) & 0x3));
+ regmap_write(adv7511->regmap, ADV7511_REG_SYNC_DECODER(4),
+ vsync_len & 0xff);
+
+ hsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PHSYNC);
+ vsync_polarity = !(adj_mode->flags & DRM_MODE_FLAG_PVSYNC);
+ } else {
+ enum adv7511_sync_polarity mode_hsync_polarity;
+ enum adv7511_sync_polarity mode_vsync_polarity;
+
+ /**
+ * If the input signal is always low or always high we want to
+ * invert or let it passthrough depending on the polarity of the
+ * current mode.
+ **/
+ if (adj_mode->flags & DRM_MODE_FLAG_NHSYNC)
+ mode_hsync_polarity = ADV7511_SYNC_POLARITY_LOW;
+ else
+ mode_hsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
+
+ if (adj_mode->flags & DRM_MODE_FLAG_NVSYNC)
+ mode_vsync_polarity = ADV7511_SYNC_POLARITY_LOW;
+ else
+ mode_vsync_polarity = ADV7511_SYNC_POLARITY_HIGH;
+
+ if (adv7511->hsync_polarity != mode_hsync_polarity &&
+ adv7511->hsync_polarity !=
+ ADV7511_SYNC_POLARITY_PASSTHROUGH)
+ hsync_polarity = 1;
+
+ if (adv7511->vsync_polarity != mode_vsync_polarity &&
+ adv7511->vsync_polarity !=
+ ADV7511_SYNC_POLARITY_PASSTHROUGH)
+ vsync_polarity = 1;
+ }
+
+ if (drm_mode_vrefresh(mode) <= 24)
+ low_refresh_rate = ADV7511_LOW_REFRESH_RATE_24HZ;
+ else if (drm_mode_vrefresh(mode) <= 25)
+ low_refresh_rate = ADV7511_LOW_REFRESH_RATE_25HZ;
+ else if (drm_mode_vrefresh(mode) <= 30)
+ low_refresh_rate = ADV7511_LOW_REFRESH_RATE_30HZ;
+ else
+ low_refresh_rate = ADV7511_LOW_REFRESH_RATE_NONE;
+
+ if (adv7511->type == ADV7511)
+ regmap_update_bits(adv7511->regmap, 0xfb,
+ 0x6, low_refresh_rate << 1);
+ else
+ regmap_update_bits(adv7511->regmap, 0x4a,
+ 0xc, low_refresh_rate << 2);
+
+ regmap_update_bits(adv7511->regmap, 0x17,
+ 0x60, (vsync_polarity << 6) | (hsync_polarity << 5));
+
+ drm_mode_copy(&adv7511->curr_mode, adj_mode);
+
+ /*
+ * TODO Test first order 4:2:2 to 4:4:4 up conversion method, which is
+ * supposed to give better results.
+ */
+
+ adv7511->f_tmds = mode->clock;
+}
+
+/* -----------------------------------------------------------------------------
+ * DRM Connector Operations
+ */
+
+static struct adv7511 *connector_to_adv7511(struct drm_connector *connector)
+{
+ return container_of(connector, struct adv7511, connector);
+}
+
+static int adv7511_connector_get_modes(struct drm_connector *connector)
+{
+ struct adv7511 *adv = connector_to_adv7511(connector);
+
+ return adv7511_get_modes(adv, connector);
+}
+
+static enum drm_mode_status
+adv7511_connector_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ struct adv7511 *adv = connector_to_adv7511(connector);
+
+ return adv7511_mode_valid(adv, mode);
+}
+
+static struct drm_connector_helper_funcs adv7511_connector_helper_funcs = {
+ .get_modes = adv7511_connector_get_modes,
+ .mode_valid = adv7511_connector_mode_valid,
+};
+
+static enum drm_connector_status
+adv7511_connector_detect(struct drm_connector *connector, bool force)
+{
+ struct adv7511 *adv = connector_to_adv7511(connector);
+
+ return adv7511_detect(adv, connector);
+}
+
+static const struct drm_connector_funcs adv7511_connector_funcs = {
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .detect = adv7511_connector_detect,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int adv7511_connector_init(struct adv7511 *adv)
+{
+ struct drm_bridge *bridge = &adv->bridge;
+ int ret;
+
+ if (!bridge->encoder) {
+ DRM_ERROR("Parent encoder object not found");
+ return -ENODEV;
+ }
+
+ if (adv->i2c_main->irq)
+ adv->connector.polled = DRM_CONNECTOR_POLL_HPD;
+ else
+ adv->connector.polled = DRM_CONNECTOR_POLL_CONNECT |
+ DRM_CONNECTOR_POLL_DISCONNECT;
+
+ ret = drm_connector_init(bridge->dev, &adv->connector,
+ &adv7511_connector_funcs,
+ DRM_MODE_CONNECTOR_HDMIA);
+ if (ret < 0) {
+ DRM_ERROR("Failed to initialize connector with drm\n");
+ return ret;
+ }
+ drm_connector_helper_add(&adv->connector,
+ &adv7511_connector_helper_funcs);
+ drm_connector_attach_encoder(&adv->connector, bridge->encoder);
+
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * DRM Bridge Operations
+ */
+
+static struct adv7511 *bridge_to_adv7511(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct adv7511, bridge);
+}
+
+static void adv7511_bridge_enable(struct drm_bridge *bridge)
+{
+ struct adv7511 *adv = bridge_to_adv7511(bridge);
+
+ adv7511_power_on(adv);
+}
+
+static void adv7511_bridge_disable(struct drm_bridge *bridge)
+{
+ struct adv7511 *adv = bridge_to_adv7511(bridge);
+
+ adv7511_power_off(adv);
+}
+
+static void adv7511_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adj_mode)
+{
+ struct adv7511 *adv = bridge_to_adv7511(bridge);
+
+ adv7511_mode_set(adv, mode, adj_mode);
+}
+
+static enum drm_mode_status adv7511_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct adv7511 *adv = bridge_to_adv7511(bridge);
+
+ if (adv->type == ADV7533 || adv->type == ADV7535)
+ return adv7533_mode_valid(adv, mode);
+ else
+ return adv7511_mode_valid(adv, mode);
+}
+
+static int adv7511_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct adv7511 *adv = bridge_to_adv7511(bridge);
+ int ret = 0;
+
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+ ret = adv7511_connector_init(adv);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (adv->i2c_main->irq)
+ regmap_write(adv->regmap, ADV7511_REG_INT_ENABLE(0),
+ ADV7511_INT0_HPD);
+
+ return ret;
+}
+
+static enum drm_connector_status adv7511_bridge_detect(struct drm_bridge *bridge)
+{
+ struct adv7511 *adv = bridge_to_adv7511(bridge);
+
+ return adv7511_detect(adv, NULL);
+}
+
+static struct edid *adv7511_bridge_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct adv7511 *adv = bridge_to_adv7511(bridge);
+
+ return adv7511_get_edid(adv, connector);
+}
+
+static void adv7511_bridge_hpd_notify(struct drm_bridge *bridge,
+ enum drm_connector_status status)
+{
+ struct adv7511 *adv = bridge_to_adv7511(bridge);
+
+ if (status == connector_status_disconnected)
+ cec_phys_addr_invalidate(adv->cec_adap);
+}
+
+static const struct drm_bridge_funcs adv7511_bridge_funcs = {
+ .enable = adv7511_bridge_enable,
+ .disable = adv7511_bridge_disable,
+ .mode_set = adv7511_bridge_mode_set,
+ .mode_valid = adv7511_bridge_mode_valid,
+ .attach = adv7511_bridge_attach,
+ .detect = adv7511_bridge_detect,
+ .get_edid = adv7511_bridge_get_edid,
+ .hpd_notify = adv7511_bridge_hpd_notify,
+};
+
+/* -----------------------------------------------------------------------------
+ * Probe & remove
+ */
+
+static const char * const adv7511_supply_names[] = {
+ "avdd",
+ "dvdd",
+ "pvdd",
+ "bgvdd",
+ "dvdd-3v",
+};
+
+static const char * const adv7533_supply_names[] = {
+ "avdd",
+ "dvdd",
+ "pvdd",
+ "a2vdd",
+ "v3p3",
+ "v1p2",
+};
+
+static int adv7511_init_regulators(struct adv7511 *adv)
+{
+ struct device *dev = &adv->i2c_main->dev;
+ const char * const *supply_names;
+ unsigned int i;
+ int ret;
+
+ if (adv->type == ADV7511) {
+ supply_names = adv7511_supply_names;
+ adv->num_supplies = ARRAY_SIZE(adv7511_supply_names);
+ } else {
+ supply_names = adv7533_supply_names;
+ adv->num_supplies = ARRAY_SIZE(adv7533_supply_names);
+ }
+
+ adv->supplies = devm_kcalloc(dev, adv->num_supplies,
+ sizeof(*adv->supplies), GFP_KERNEL);
+ if (!adv->supplies)
+ return -ENOMEM;
+
+ for (i = 0; i < adv->num_supplies; i++)
+ adv->supplies[i].supply = supply_names[i];
+
+ ret = devm_regulator_bulk_get(dev, adv->num_supplies, adv->supplies);
+ if (ret)
+ return ret;
+
+ return regulator_bulk_enable(adv->num_supplies, adv->supplies);
+}
+
+static void adv7511_uninit_regulators(struct adv7511 *adv)
+{
+ regulator_bulk_disable(adv->num_supplies, adv->supplies);
+}
+
+static bool adv7511_cec_register_volatile(struct device *dev, unsigned int reg)
+{
+ struct i2c_client *i2c = to_i2c_client(dev);
+ struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
+
+ reg -= adv7511->reg_cec_offset;
+
+ switch (reg) {
+ case ADV7511_REG_CEC_RX1_FRAME_HDR:
+ case ADV7511_REG_CEC_RX1_FRAME_DATA0 ... ADV7511_REG_CEC_RX1_FRAME_DATA0 + 14:
+ case ADV7511_REG_CEC_RX1_FRAME_LEN:
+ case ADV7511_REG_CEC_RX2_FRAME_HDR:
+ case ADV7511_REG_CEC_RX2_FRAME_DATA0 ... ADV7511_REG_CEC_RX2_FRAME_DATA0 + 14:
+ case ADV7511_REG_CEC_RX2_FRAME_LEN:
+ case ADV7511_REG_CEC_RX3_FRAME_HDR:
+ case ADV7511_REG_CEC_RX3_FRAME_DATA0 ... ADV7511_REG_CEC_RX3_FRAME_DATA0 + 14:
+ case ADV7511_REG_CEC_RX3_FRAME_LEN:
+ case ADV7511_REG_CEC_RX_STATUS:
+ case ADV7511_REG_CEC_RX_BUFFERS:
+ case ADV7511_REG_CEC_TX_LOW_DRV_CNT:
+ return true;
+ }
+
+ return false;
+}
+
+static const struct regmap_config adv7511_cec_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = 0xff,
+ .cache_type = REGCACHE_RBTREE,
+ .volatile_reg = adv7511_cec_register_volatile,
+};
+
+static int adv7511_init_cec_regmap(struct adv7511 *adv)
+{
+ int ret;
+
+ adv->i2c_cec = i2c_new_ancillary_device(adv->i2c_main, "cec",
+ ADV7511_CEC_I2C_ADDR_DEFAULT);
+ if (IS_ERR(adv->i2c_cec))
+ return PTR_ERR(adv->i2c_cec);
+
+ regmap_write(adv->regmap, ADV7511_REG_CEC_I2C_ADDR,
+ adv->i2c_cec->addr << 1);
+
+ i2c_set_clientdata(adv->i2c_cec, adv);
+
+ adv->regmap_cec = devm_regmap_init_i2c(adv->i2c_cec,
+ &adv7511_cec_regmap_config);
+ if (IS_ERR(adv->regmap_cec)) {
+ ret = PTR_ERR(adv->regmap_cec);
+ goto err;
+ }
+
+ if (adv->type == ADV7533 || adv->type == ADV7535) {
+ ret = adv7533_patch_cec_registers(adv);
+ if (ret)
+ goto err;
+
+ adv->reg_cec_offset = ADV7533_REG_CEC_OFFSET;
+ }
+
+ return 0;
+err:
+ i2c_unregister_device(adv->i2c_cec);
+ return ret;
+}
+
+static int adv7511_parse_dt(struct device_node *np,
+ struct adv7511_link_config *config)
+{
+ const char *str;
+ int ret;
+
+ of_property_read_u32(np, "adi,input-depth", &config->input_color_depth);
+ if (config->input_color_depth != 8 && config->input_color_depth != 10 &&
+ config->input_color_depth != 12)
+ return -EINVAL;
+
+ ret = of_property_read_string(np, "adi,input-colorspace", &str);
+ if (ret < 0)
+ return ret;
+
+ if (!strcmp(str, "rgb"))
+ config->input_colorspace = HDMI_COLORSPACE_RGB;
+ else if (!strcmp(str, "yuv422"))
+ config->input_colorspace = HDMI_COLORSPACE_YUV422;
+ else if (!strcmp(str, "yuv444"))
+ config->input_colorspace = HDMI_COLORSPACE_YUV444;
+ else
+ return -EINVAL;
+
+ ret = of_property_read_string(np, "adi,input-clock", &str);
+ if (ret < 0)
+ return ret;
+
+ if (!strcmp(str, "1x"))
+ config->input_clock = ADV7511_INPUT_CLOCK_1X;
+ else if (!strcmp(str, "2x"))
+ config->input_clock = ADV7511_INPUT_CLOCK_2X;
+ else if (!strcmp(str, "ddr"))
+ config->input_clock = ADV7511_INPUT_CLOCK_DDR;
+ else
+ return -EINVAL;
+
+ if (config->input_colorspace == HDMI_COLORSPACE_YUV422 ||
+ config->input_clock != ADV7511_INPUT_CLOCK_1X) {
+ ret = of_property_read_u32(np, "adi,input-style",
+ &config->input_style);
+ if (ret)
+ return ret;
+
+ if (config->input_style < 1 || config->input_style > 3)
+ return -EINVAL;
+
+ ret = of_property_read_string(np, "adi,input-justification",
+ &str);
+ if (ret < 0)
+ return ret;
+
+ if (!strcmp(str, "left"))
+ config->input_justification =
+ ADV7511_INPUT_JUSTIFICATION_LEFT;
+ else if (!strcmp(str, "evenly"))
+ config->input_justification =
+ ADV7511_INPUT_JUSTIFICATION_EVENLY;
+ else if (!strcmp(str, "right"))
+ config->input_justification =
+ ADV7511_INPUT_JUSTIFICATION_RIGHT;
+ else
+ return -EINVAL;
+
+ } else {
+ config->input_style = 1;
+ config->input_justification = ADV7511_INPUT_JUSTIFICATION_LEFT;
+ }
+
+ of_property_read_u32(np, "adi,clock-delay", &config->clock_delay);
+ if (config->clock_delay < -1200 || config->clock_delay > 1600)
+ return -EINVAL;
+
+ config->embedded_sync = of_property_read_bool(np, "adi,embedded-sync");
+
+ /* Hardcode the sync pulse configurations for now. */
+ config->sync_pulse = ADV7511_INPUT_SYNC_PULSE_NONE;
+ config->vsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
+ config->hsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
+
+ return 0;
+}
+
+static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
+{
+ struct adv7511_link_config link_config;
+ struct adv7511 *adv7511;
+ struct device *dev = &i2c->dev;
+ unsigned int val;
+ int ret;
+
+ if (!dev->of_node)
+ return -EINVAL;
+
+ adv7511 = devm_kzalloc(dev, sizeof(*adv7511), GFP_KERNEL);
+ if (!adv7511)
+ return -ENOMEM;
+
+ adv7511->i2c_main = i2c;
+ adv7511->powered = false;
+ adv7511->status = connector_status_disconnected;
+
+ if (dev->of_node)
+ adv7511->type = (enum adv7511_type)of_device_get_match_data(dev);
+ else
+ adv7511->type = id->driver_data;
+
+ memset(&link_config, 0, sizeof(link_config));
+
+ if (adv7511->type == ADV7511)
+ ret = adv7511_parse_dt(dev->of_node, &link_config);
+ else
+ ret = adv7533_parse_dt(dev->of_node, adv7511);
+ if (ret)
+ return ret;
+
+ ret = adv7511_init_regulators(adv7511);
+ if (ret) {
+ dev_err(dev, "failed to init regulators\n");
+ return ret;
+ }
+
+ /*
+ * The power down GPIO is optional. If present, toggle it from active to
+ * inactive to wake up the encoder.
+ */
+ adv7511->gpio_pd = devm_gpiod_get_optional(dev, "pd", GPIOD_OUT_HIGH);
+ if (IS_ERR(adv7511->gpio_pd)) {
+ ret = PTR_ERR(adv7511->gpio_pd);
+ goto uninit_regulators;
+ }
+
+ if (adv7511->gpio_pd) {
+ usleep_range(5000, 6000);
+ gpiod_set_value_cansleep(adv7511->gpio_pd, 0);
+ }
+
+ adv7511->regmap = devm_regmap_init_i2c(i2c, &adv7511_regmap_config);
+ if (IS_ERR(adv7511->regmap)) {
+ ret = PTR_ERR(adv7511->regmap);
+ goto uninit_regulators;
+ }
+
+ ret = regmap_read(adv7511->regmap, ADV7511_REG_CHIP_REVISION, &val);
+ if (ret)
+ goto uninit_regulators;
+ dev_dbg(dev, "Rev. %d\n", val);
+
+ if (adv7511->type == ADV7511)
+ ret = regmap_register_patch(adv7511->regmap,
+ adv7511_fixed_registers,
+ ARRAY_SIZE(adv7511_fixed_registers));
+ else
+ ret = adv7533_patch_registers(adv7511);
+ if (ret)
+ goto uninit_regulators;
+
+ adv7511_packet_disable(adv7511, 0xffff);
+
+ adv7511->i2c_edid = i2c_new_ancillary_device(i2c, "edid",
+ ADV7511_EDID_I2C_ADDR_DEFAULT);
+ if (IS_ERR(adv7511->i2c_edid)) {
+ ret = PTR_ERR(adv7511->i2c_edid);
+ goto uninit_regulators;
+ }
+
+ regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR,
+ adv7511->i2c_edid->addr << 1);
+
+ adv7511->i2c_packet = i2c_new_ancillary_device(i2c, "packet",
+ ADV7511_PACKET_I2C_ADDR_DEFAULT);
+ if (IS_ERR(adv7511->i2c_packet)) {
+ ret = PTR_ERR(adv7511->i2c_packet);
+ goto err_i2c_unregister_edid;
+ }
+
+ regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR,
+ adv7511->i2c_packet->addr << 1);
+
+ ret = adv7511_init_cec_regmap(adv7511);
+ if (ret)
+ goto err_i2c_unregister_packet;
+
+ INIT_WORK(&adv7511->hpd_work, adv7511_hpd_work);
+
+ if (i2c->irq) {
+ init_waitqueue_head(&adv7511->wq);
+
+ ret = devm_request_threaded_irq(dev, i2c->irq, NULL,
+ adv7511_irq_handler,
+ IRQF_ONESHOT, dev_name(dev),
+ adv7511);
+ if (ret)
+ goto err_unregister_cec;
+ }
+
+ adv7511_power_off(adv7511);
+
+ i2c_set_clientdata(i2c, adv7511);
+
+ if (adv7511->type == ADV7511)
+ adv7511_set_link_config(adv7511, &link_config);
+
+ ret = adv7511_cec_init(dev, adv7511);
+ if (ret)
+ goto err_unregister_cec;
+
+ adv7511->bridge.funcs = &adv7511_bridge_funcs;
+ adv7511->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID;
+ if (adv7511->i2c_main->irq)
+ adv7511->bridge.ops |= DRM_BRIDGE_OP_HPD;
+
+ adv7511->bridge.of_node = dev->of_node;
+ adv7511->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
+
+ drm_bridge_add(&adv7511->bridge);
+
+ adv7511_audio_init(dev, adv7511);
+
+ if (adv7511->type == ADV7533 || adv7511->type == ADV7535) {
+ ret = adv7533_attach_dsi(adv7511);
+ if (ret)
+ goto err_unregister_audio;
+ }
+
+ return 0;
+
+err_unregister_audio:
+ adv7511_audio_exit(adv7511);
+ drm_bridge_remove(&adv7511->bridge);
+err_unregister_cec:
+ cec_unregister_adapter(adv7511->cec_adap);
+ i2c_unregister_device(adv7511->i2c_cec);
+ clk_disable_unprepare(adv7511->cec_clk);
+err_i2c_unregister_packet:
+ i2c_unregister_device(adv7511->i2c_packet);
+err_i2c_unregister_edid:
+ i2c_unregister_device(adv7511->i2c_edid);
+uninit_regulators:
+ adv7511_uninit_regulators(adv7511);
+
+ return ret;
+}
+
+static void adv7511_remove(struct i2c_client *i2c)
+{
+ struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
+
+ adv7511_uninit_regulators(adv7511);
+
+ drm_bridge_remove(&adv7511->bridge);
+
+ adv7511_audio_exit(adv7511);
+
+ cec_unregister_adapter(adv7511->cec_adap);
+ i2c_unregister_device(adv7511->i2c_cec);
+ clk_disable_unprepare(adv7511->cec_clk);
+
+ i2c_unregister_device(adv7511->i2c_packet);
+ i2c_unregister_device(adv7511->i2c_edid);
+}
+
+static const struct i2c_device_id adv7511_i2c_ids[] = {
+ { "adv7511", ADV7511 },
+ { "adv7511w", ADV7511 },
+ { "adv7513", ADV7511 },
+ { "adv7533", ADV7533 },
+ { "adv7535", ADV7535 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, adv7511_i2c_ids);
+
+static const struct of_device_id adv7511_of_ids[] = {
+ { .compatible = "adi,adv7511", .data = (void *)ADV7511 },
+ { .compatible = "adi,adv7511w", .data = (void *)ADV7511 },
+ { .compatible = "adi,adv7513", .data = (void *)ADV7511 },
+ { .compatible = "adi,adv7533", .data = (void *)ADV7533 },
+ { .compatible = "adi,adv7535", .data = (void *)ADV7535 },
+ { }
+};
+MODULE_DEVICE_TABLE(of, adv7511_of_ids);
+
+static struct mipi_dsi_driver adv7533_dsi_driver = {
+ .driver.name = "adv7533",
+};
+
+static struct i2c_driver adv7511_driver = {
+ .driver = {
+ .name = "adv7511",
+ .of_match_table = adv7511_of_ids,
+ },
+ .id_table = adv7511_i2c_ids,
+ .probe = adv7511_probe,
+ .remove = adv7511_remove,
+};
+
+static int __init adv7511_init(void)
+{
+ int ret;
+
+ if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) {
+ ret = mipi_dsi_driver_register(&adv7533_dsi_driver);
+ if (ret)
+ return ret;
+ }
+
+ ret = i2c_add_driver(&adv7511_driver);
+ if (ret) {
+ if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
+ mipi_dsi_driver_unregister(&adv7533_dsi_driver);
+ }
+
+ return ret;
+}
+module_init(adv7511_init);
+
+static void __exit adv7511_exit(void)
+{
+ i2c_del_driver(&adv7511_driver);
+
+ if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
+ mipi_dsi_driver_unregister(&adv7533_dsi_driver);
+}
+module_exit(adv7511_exit);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("ADV7511 HDMI transmitter driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7533.c b/drivers/gpu/drm/bridge/adv7511/adv7533.c
new file mode 100644
index 000000000..b8eeaf473
--- /dev/null
+++ b/drivers/gpu/drm/bridge/adv7511/adv7533.c
@@ -0,0 +1,201 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2016, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/of_graph.h>
+
+#include "adv7511.h"
+
+static const struct reg_sequence adv7533_fixed_registers[] = {
+ { 0x16, 0x20 },
+ { 0x9a, 0xe0 },
+ { 0xba, 0x70 },
+ { 0xde, 0x82 },
+ { 0xe4, 0x40 },
+ { 0xe5, 0x80 },
+};
+
+static const struct reg_sequence adv7533_cec_fixed_registers[] = {
+ { 0x15, 0xd0 },
+ { 0x17, 0xd0 },
+ { 0x24, 0x20 },
+ { 0x57, 0x11 },
+ { 0x05, 0xc8 },
+};
+
+static void adv7511_dsi_config_timing_gen(struct adv7511 *adv)
+{
+ struct mipi_dsi_device *dsi = adv->dsi;
+ struct drm_display_mode *mode = &adv->curr_mode;
+ unsigned int hsw, hfp, hbp, vsw, vfp, vbp;
+ static const u8 clock_div_by_lanes[] = { 6, 4, 3 }; /* 2, 3, 4 lanes */
+
+ hsw = mode->hsync_end - mode->hsync_start;
+ hfp = mode->hsync_start - mode->hdisplay;
+ hbp = mode->htotal - mode->hsync_end;
+ vsw = mode->vsync_end - mode->vsync_start;
+ vfp = mode->vsync_start - mode->vdisplay;
+ vbp = mode->vtotal - mode->vsync_end;
+
+ /* set pixel clock divider mode */
+ regmap_write(adv->regmap_cec, 0x16,
+ clock_div_by_lanes[dsi->lanes - 2] << 3);
+
+ /* horizontal porch params */
+ regmap_write(adv->regmap_cec, 0x28, mode->htotal >> 4);
+ regmap_write(adv->regmap_cec, 0x29, (mode->htotal << 4) & 0xff);
+ regmap_write(adv->regmap_cec, 0x2a, hsw >> 4);
+ regmap_write(adv->regmap_cec, 0x2b, (hsw << 4) & 0xff);
+ regmap_write(adv->regmap_cec, 0x2c, hfp >> 4);
+ regmap_write(adv->regmap_cec, 0x2d, (hfp << 4) & 0xff);
+ regmap_write(adv->regmap_cec, 0x2e, hbp >> 4);
+ regmap_write(adv->regmap_cec, 0x2f, (hbp << 4) & 0xff);
+
+ /* vertical porch params */
+ regmap_write(adv->regmap_cec, 0x30, mode->vtotal >> 4);
+ regmap_write(adv->regmap_cec, 0x31, (mode->vtotal << 4) & 0xff);
+ regmap_write(adv->regmap_cec, 0x32, vsw >> 4);
+ regmap_write(adv->regmap_cec, 0x33, (vsw << 4) & 0xff);
+ regmap_write(adv->regmap_cec, 0x34, vfp >> 4);
+ regmap_write(adv->regmap_cec, 0x35, (vfp << 4) & 0xff);
+ regmap_write(adv->regmap_cec, 0x36, vbp >> 4);
+ regmap_write(adv->regmap_cec, 0x37, (vbp << 4) & 0xff);
+}
+
+void adv7533_dsi_power_on(struct adv7511 *adv)
+{
+ struct mipi_dsi_device *dsi = adv->dsi;
+
+ if (adv->use_timing_gen)
+ adv7511_dsi_config_timing_gen(adv);
+
+ /* set number of dsi lanes */
+ regmap_write(adv->regmap_cec, 0x1c, dsi->lanes << 4);
+
+ if (adv->use_timing_gen) {
+ /* reset internal timing generator */
+ regmap_write(adv->regmap_cec, 0x27, 0xcb);
+ regmap_write(adv->regmap_cec, 0x27, 0x8b);
+ regmap_write(adv->regmap_cec, 0x27, 0xcb);
+ } else {
+ /* disable internal timing generator */
+ regmap_write(adv->regmap_cec, 0x27, 0x0b);
+ }
+
+ /* enable hdmi */
+ regmap_write(adv->regmap_cec, 0x03, 0x89);
+ /* disable test mode */
+ regmap_write(adv->regmap_cec, 0x55, 0x00);
+
+ regmap_register_patch(adv->regmap_cec, adv7533_cec_fixed_registers,
+ ARRAY_SIZE(adv7533_cec_fixed_registers));
+}
+
+void adv7533_dsi_power_off(struct adv7511 *adv)
+{
+ /* disable hdmi */
+ regmap_write(adv->regmap_cec, 0x03, 0x0b);
+ /* disable internal timing generator */
+ regmap_write(adv->regmap_cec, 0x27, 0x0b);
+}
+
+enum drm_mode_status adv7533_mode_valid(struct adv7511 *adv,
+ const struct drm_display_mode *mode)
+{
+ unsigned long max_lane_freq;
+ struct mipi_dsi_device *dsi = adv->dsi;
+ u8 bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
+
+ /* Check max clock for either 7533 or 7535 */
+ if (mode->clock > (adv->type == ADV7533 ? 80000 : 148500))
+ return MODE_CLOCK_HIGH;
+
+ /* Check max clock for each lane */
+ max_lane_freq = (adv->type == ADV7533 ? 800000 : 891000);
+
+ if (mode->clock * bpp > max_lane_freq * adv->num_dsi_lanes)
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
+}
+
+int adv7533_patch_registers(struct adv7511 *adv)
+{
+ return regmap_register_patch(adv->regmap,
+ adv7533_fixed_registers,
+ ARRAY_SIZE(adv7533_fixed_registers));
+}
+
+int adv7533_patch_cec_registers(struct adv7511 *adv)
+{
+ return regmap_register_patch(adv->regmap_cec,
+ adv7533_cec_fixed_registers,
+ ARRAY_SIZE(adv7533_cec_fixed_registers));
+}
+
+int adv7533_attach_dsi(struct adv7511 *adv)
+{
+ struct device *dev = &adv->i2c_main->dev;
+ struct mipi_dsi_host *host;
+ struct mipi_dsi_device *dsi;
+ int ret = 0;
+ const struct mipi_dsi_device_info info = { .type = "adv7533",
+ .channel = 0,
+ .node = NULL,
+ };
+
+ host = of_find_mipi_dsi_host_by_node(adv->host_node);
+ if (!host) {
+ dev_err(dev, "failed to find dsi host\n");
+ return -EPROBE_DEFER;
+ }
+
+ dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
+ if (IS_ERR(dsi)) {
+ dev_err(dev, "failed to create dsi device\n");
+ return PTR_ERR(dsi);
+ }
+
+ adv->dsi = dsi;
+
+ dsi->lanes = adv->num_dsi_lanes;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
+ MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_VIDEO_HSE;
+
+ ret = devm_mipi_dsi_attach(dev, dsi);
+ if (ret < 0) {
+ dev_err(dev, "failed to attach dsi to host\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv)
+{
+ u32 num_lanes;
+
+ of_property_read_u32(np, "adi,dsi-lanes", &num_lanes);
+
+ if (num_lanes < 1 || num_lanes > 4)
+ return -EINVAL;
+
+ adv->num_dsi_lanes = num_lanes;
+
+ adv->host_node = of_graph_get_remote_node(np, 0, 0);
+ if (!adv->host_node)
+ return -ENODEV;
+
+ of_node_put(adv->host_node);
+
+ adv->use_timing_gen = !of_property_read_bool(np,
+ "adi,disable-timing-generator");
+
+ /* TODO: Check if these need to be parsed by DT or not */
+ adv->rgb = true;
+ adv->embedded_sync = false;
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/bridge/analogix/Kconfig b/drivers/gpu/drm/bridge/analogix/Kconfig
new file mode 100644
index 000000000..173dada21
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/Kconfig
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config DRM_ANALOGIX_ANX6345
+ tristate "Analogix ANX6345 bridge"
+ depends on OF
+ select DRM_ANALOGIX_DP
+ select DRM_DISPLAY_DP_HELPER
+ select DRM_DISPLAY_HELPER
+ select DRM_KMS_HELPER
+ select REGMAP_I2C
+ help
+ ANX6345 is an ultra-low power Full-HD DisplayPort/eDP
+ transmitter designed for portable devices. The
+ ANX6345 transforms the LVTTL RGB output of an
+ application processor to eDP or DisplayPort.
+
+config DRM_ANALOGIX_ANX78XX
+ tristate "Analogix ANX78XX bridge"
+ select DRM_ANALOGIX_DP
+ select DRM_DISPLAY_DP_HELPER
+ select DRM_DISPLAY_HELPER
+ select DRM_KMS_HELPER
+ select REGMAP_I2C
+ help
+ ANX78XX is an ultra-low power Full-HD SlimPort transmitter
+ designed for portable devices. The ANX78XX transforms
+ the HDMI output of an application processor to MyDP
+ or DisplayPort.
+
+config DRM_ANALOGIX_DP
+ tristate
+ depends on DRM
+
+config DRM_ANALOGIX_ANX7625
+ tristate "Analogix Anx7625 MIPI to DP interface support"
+ depends on DRM
+ depends on OF
+ select DRM_DISPLAY_DP_HELPER
+ select DRM_DISPLAY_HDCP_HELPER
+ select DRM_DISPLAY_HELPER
+ select DRM_DP_AUX_BUS
+ select DRM_MIPI_DSI
+ help
+ ANX7625 is an ultra-low power 4K mobile HD transmitter
+ designed for portable devices. It converts MIPI/DPI to
+ DisplayPort1.3 4K.
diff --git a/drivers/gpu/drm/bridge/analogix/Makefile b/drivers/gpu/drm/bridge/analogix/Makefile
new file mode 100644
index 000000000..44da392bb
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
+analogix_dp-objs := analogix_dp_core.o analogix_dp_reg.o analogix-i2c-dptx.o
+obj-$(CONFIG_DRM_ANALOGIX_ANX6345) += analogix-anx6345.o
+obj-$(CONFIG_DRM_ANALOGIX_ANX7625) += anx7625.o
+obj-$(CONFIG_DRM_ANALOGIX_ANX78XX) += analogix-anx78xx.o
+obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix_dp.o
diff --git a/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c b/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c
new file mode 100644
index 000000000..660a54857
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c
@@ -0,0 +1,828 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright(c) 2016, Analogix Semiconductor.
+ * Copyright(c) 2017, Icenowy Zheng <icenowy@aosc.io>
+ *
+ * Based on anx7808 driver obtained from chromeos with copyright:
+ * Copyright(c) 2013, Google Inc.
+ */
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/types.h>
+
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include "analogix-i2c-dptx.h"
+#include "analogix-i2c-txcommon.h"
+
+#define POLL_DELAY 50000 /* us */
+#define POLL_TIMEOUT 5000000 /* us */
+
+#define I2C_IDX_DPTX 0
+#define I2C_IDX_TXCOM 1
+
+static const u8 anx6345_i2c_addresses[] = {
+ [I2C_IDX_DPTX] = 0x70,
+ [I2C_IDX_TXCOM] = 0x72,
+};
+#define I2C_NUM_ADDRESSES ARRAY_SIZE(anx6345_i2c_addresses)
+
+struct anx6345 {
+ struct drm_dp_aux aux;
+ struct drm_bridge bridge;
+ struct i2c_client *client;
+ struct edid *edid;
+ struct drm_connector connector;
+ struct drm_panel *panel;
+ struct regulator *dvdd12;
+ struct regulator *dvdd25;
+ struct gpio_desc *gpiod_reset;
+ struct mutex lock; /* protect EDID access */
+
+ /* I2C Slave addresses of ANX6345 are mapped as DPTX and SYS */
+ struct i2c_client *i2c_clients[I2C_NUM_ADDRESSES];
+ struct regmap *map[I2C_NUM_ADDRESSES];
+
+ u16 chipid;
+ u8 dpcd[DP_RECEIVER_CAP_SIZE];
+
+ bool powered;
+};
+
+static inline struct anx6345 *connector_to_anx6345(struct drm_connector *c)
+{
+ return container_of(c, struct anx6345, connector);
+}
+
+static inline struct anx6345 *bridge_to_anx6345(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct anx6345, bridge);
+}
+
+static int anx6345_set_bits(struct regmap *map, u8 reg, u8 mask)
+{
+ return regmap_update_bits(map, reg, mask, mask);
+}
+
+static int anx6345_clear_bits(struct regmap *map, u8 reg, u8 mask)
+{
+ return regmap_update_bits(map, reg, mask, 0);
+}
+
+static ssize_t anx6345_aux_transfer(struct drm_dp_aux *aux,
+ struct drm_dp_aux_msg *msg)
+{
+ struct anx6345 *anx6345 = container_of(aux, struct anx6345, aux);
+
+ return anx_dp_aux_transfer(anx6345->map[I2C_IDX_DPTX], msg);
+}
+
+static int anx6345_dp_link_training(struct anx6345 *anx6345)
+{
+ unsigned int value;
+ u8 dp_bw, dpcd[2];
+ int err;
+
+ err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM],
+ SP_POWERDOWN_CTRL_REG,
+ SP_TOTAL_PD);
+ if (err)
+ return err;
+
+ err = drm_dp_dpcd_readb(&anx6345->aux, DP_MAX_LINK_RATE, &dp_bw);
+ if (err < 0)
+ return err;
+
+ switch (dp_bw) {
+ case DP_LINK_BW_1_62:
+ case DP_LINK_BW_2_7:
+ break;
+
+ default:
+ DRM_DEBUG_KMS("DP bandwidth (%#02x) not supported\n", dp_bw);
+ return -EINVAL;
+ }
+
+ err = anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL1_REG,
+ SP_VIDEO_MUTE);
+ if (err)
+ return err;
+
+ err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM],
+ SP_VID_CTRL1_REG, SP_VIDEO_EN);
+ if (err)
+ return err;
+
+ /* Get DPCD info */
+ err = drm_dp_dpcd_read(&anx6345->aux, DP_DPCD_REV,
+ &anx6345->dpcd, DP_RECEIVER_CAP_SIZE);
+ if (err < 0) {
+ DRM_ERROR("Failed to read DPCD: %d\n", err);
+ return err;
+ }
+
+ /* Clear channel x SERDES power down */
+ err = anx6345_clear_bits(anx6345->map[I2C_IDX_DPTX],
+ SP_DP_ANALOG_POWER_DOWN_REG, SP_CH0_PD);
+ if (err)
+ return err;
+
+ /*
+ * Power up the sink (DP_SET_POWER register is only available on DPCD
+ * v1.1 and later).
+ */
+ if (anx6345->dpcd[DP_DPCD_REV] >= 0x11) {
+ err = drm_dp_dpcd_readb(&anx6345->aux, DP_SET_POWER, &dpcd[0]);
+ if (err < 0) {
+ DRM_ERROR("Failed to read DP_SET_POWER register: %d\n",
+ err);
+ return err;
+ }
+
+ dpcd[0] &= ~DP_SET_POWER_MASK;
+ dpcd[0] |= DP_SET_POWER_D0;
+
+ err = drm_dp_dpcd_writeb(&anx6345->aux, DP_SET_POWER, dpcd[0]);
+ if (err < 0) {
+ DRM_ERROR("Failed to power up DisplayPort link: %d\n",
+ err);
+ return err;
+ }
+
+ /*
+ * According to the DP 1.1 specification, a "Sink Device must
+ * exit the power saving state within 1 ms" (Section 2.5.3.1,
+ * Table 5-52, "Sink Control Field" (register 0x600).
+ */
+ usleep_range(1000, 2000);
+ }
+
+ /* Possibly enable downspread on the sink */
+ err = regmap_write(anx6345->map[I2C_IDX_DPTX],
+ SP_DP_DOWNSPREAD_CTRL1_REG, 0);
+ if (err)
+ return err;
+
+ if (anx6345->dpcd[DP_MAX_DOWNSPREAD] & DP_MAX_DOWNSPREAD_0_5) {
+ DRM_DEBUG("Enable downspread on the sink\n");
+ /* 4000PPM */
+ err = regmap_write(anx6345->map[I2C_IDX_DPTX],
+ SP_DP_DOWNSPREAD_CTRL1_REG, 8);
+ if (err)
+ return err;
+
+ err = drm_dp_dpcd_writeb(&anx6345->aux, DP_DOWNSPREAD_CTRL,
+ DP_SPREAD_AMP_0_5);
+ if (err < 0)
+ return err;
+ } else {
+ err = drm_dp_dpcd_writeb(&anx6345->aux, DP_DOWNSPREAD_CTRL, 0);
+ if (err < 0)
+ return err;
+ }
+
+ /* Set the lane count and the link rate on the sink */
+ if (drm_dp_enhanced_frame_cap(anx6345->dpcd))
+ err = anx6345_set_bits(anx6345->map[I2C_IDX_DPTX],
+ SP_DP_SYSTEM_CTRL_BASE + 4,
+ SP_ENHANCED_MODE);
+ else
+ err = anx6345_clear_bits(anx6345->map[I2C_IDX_DPTX],
+ SP_DP_SYSTEM_CTRL_BASE + 4,
+ SP_ENHANCED_MODE);
+ if (err)
+ return err;
+
+ dpcd[0] = dp_bw;
+ err = regmap_write(anx6345->map[I2C_IDX_DPTX],
+ SP_DP_MAIN_LINK_BW_SET_REG, dpcd[0]);
+ if (err)
+ return err;
+
+ dpcd[1] = drm_dp_max_lane_count(anx6345->dpcd);
+
+ err = regmap_write(anx6345->map[I2C_IDX_DPTX],
+ SP_DP_LANE_COUNT_SET_REG, dpcd[1]);
+ if (err)
+ return err;
+
+ if (drm_dp_enhanced_frame_cap(anx6345->dpcd))
+ dpcd[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
+
+ err = drm_dp_dpcd_write(&anx6345->aux, DP_LINK_BW_SET, dpcd,
+ sizeof(dpcd));
+
+ if (err < 0) {
+ DRM_ERROR("Failed to configure link: %d\n", err);
+ return err;
+ }
+
+ /* Start training on the source */
+ err = regmap_write(anx6345->map[I2C_IDX_DPTX], SP_DP_LT_CTRL_REG,
+ SP_LT_EN);
+ if (err)
+ return err;
+
+ return regmap_read_poll_timeout(anx6345->map[I2C_IDX_DPTX],
+ SP_DP_LT_CTRL_REG,
+ value, !(value & SP_DP_LT_INPROGRESS),
+ POLL_DELAY, POLL_TIMEOUT);
+}
+
+static int anx6345_tx_initialization(struct anx6345 *anx6345)
+{
+ int err, i;
+
+ /* FIXME: colordepth is hardcoded for now */
+ err = regmap_write(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL2_REG,
+ SP_IN_BPC_6BIT << SP_IN_BPC_SHIFT);
+ if (err)
+ return err;
+
+ err = regmap_write(anx6345->map[I2C_IDX_DPTX], SP_DP_PLL_CTRL_REG, 0);
+ if (err)
+ return err;
+
+ err = regmap_write(anx6345->map[I2C_IDX_TXCOM],
+ SP_ANALOG_DEBUG1_REG, 0);
+ if (err)
+ return err;
+
+ err = regmap_write(anx6345->map[I2C_IDX_DPTX],
+ SP_DP_LINK_DEBUG_CTRL_REG,
+ SP_NEW_PRBS7 | SP_M_VID_DEBUG);
+ if (err)
+ return err;
+
+ err = regmap_write(anx6345->map[I2C_IDX_DPTX],
+ SP_DP_ANALOG_POWER_DOWN_REG, 0);
+ if (err)
+ return err;
+
+ /* Force HPD */
+ err = anx6345_set_bits(anx6345->map[I2C_IDX_DPTX],
+ SP_DP_SYSTEM_CTRL_BASE + 3,
+ SP_HPD_FORCE | SP_HPD_CTRL);
+ if (err)
+ return err;
+
+ for (i = 0; i < 4; i++) {
+ /* 4 lanes */
+ err = regmap_write(anx6345->map[I2C_IDX_DPTX],
+ SP_DP_LANE0_LT_CTRL_REG + i, 0);
+ if (err)
+ return err;
+ }
+
+ /* Reset AUX */
+ err = anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM],
+ SP_RESET_CTRL2_REG, SP_AUX_RST);
+ if (err)
+ return err;
+
+ return anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM],
+ SP_RESET_CTRL2_REG, SP_AUX_RST);
+}
+
+static void anx6345_poweron(struct anx6345 *anx6345)
+{
+ int err;
+
+ /* Ensure reset is asserted before starting power on sequence */
+ gpiod_set_value_cansleep(anx6345->gpiod_reset, 1);
+ usleep_range(1000, 2000);
+
+ err = regulator_enable(anx6345->dvdd12);
+ if (err) {
+ DRM_ERROR("Failed to enable dvdd12 regulator: %d\n",
+ err);
+ return;
+ }
+
+ /* T1 - delay between VDD12 and VDD25 should be 0-2ms */
+ usleep_range(1000, 2000);
+
+ err = regulator_enable(anx6345->dvdd25);
+ if (err) {
+ DRM_ERROR("Failed to enable dvdd25 regulator: %d\n",
+ err);
+ return;
+ }
+
+ /* T2 - delay between RESETN and all power rail stable,
+ * should be 2-5ms
+ */
+ usleep_range(2000, 5000);
+
+ gpiod_set_value_cansleep(anx6345->gpiod_reset, 0);
+
+ /* Power on registers module */
+ anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_POWERDOWN_CTRL_REG,
+ SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD | SP_LINK_PD);
+ anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], SP_POWERDOWN_CTRL_REG,
+ SP_REGISTER_PD | SP_TOTAL_PD);
+
+ if (anx6345->panel)
+ drm_panel_prepare(anx6345->panel);
+
+ anx6345->powered = true;
+}
+
+static void anx6345_poweroff(struct anx6345 *anx6345)
+{
+ int err;
+
+ gpiod_set_value_cansleep(anx6345->gpiod_reset, 1);
+ usleep_range(1000, 2000);
+
+ if (anx6345->panel)
+ drm_panel_unprepare(anx6345->panel);
+
+ err = regulator_disable(anx6345->dvdd25);
+ if (err) {
+ DRM_ERROR("Failed to disable dvdd25 regulator: %d\n",
+ err);
+ return;
+ }
+
+ usleep_range(5000, 10000);
+
+ err = regulator_disable(anx6345->dvdd12);
+ if (err) {
+ DRM_ERROR("Failed to disable dvdd12 regulator: %d\n",
+ err);
+ return;
+ }
+
+ usleep_range(1000, 2000);
+
+ anx6345->powered = false;
+}
+
+static int anx6345_start(struct anx6345 *anx6345)
+{
+ int err;
+
+ if (!anx6345->powered)
+ anx6345_poweron(anx6345);
+
+ /* Power on needed modules */
+ err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM],
+ SP_POWERDOWN_CTRL_REG,
+ SP_VIDEO_PD | SP_LINK_PD);
+
+ err = anx6345_tx_initialization(anx6345);
+ if (err) {
+ DRM_ERROR("Failed eDP transmitter initialization: %d\n", err);
+ anx6345_poweroff(anx6345);
+ return err;
+ }
+
+ err = anx6345_dp_link_training(anx6345);
+ if (err) {
+ DRM_ERROR("Failed link training: %d\n", err);
+ anx6345_poweroff(anx6345);
+ return err;
+ }
+
+ /*
+ * This delay seems to help keep the hardware in a good state. Without
+ * it, there are times where it fails silently.
+ */
+ usleep_range(10000, 15000);
+
+ return 0;
+}
+
+static int anx6345_config_dp_output(struct anx6345 *anx6345)
+{
+ int err;
+
+ err = anx6345_clear_bits(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL1_REG,
+ SP_VIDEO_MUTE);
+ if (err)
+ return err;
+
+ /* Enable DP output */
+ err = anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_VID_CTRL1_REG,
+ SP_VIDEO_EN);
+ if (err)
+ return err;
+
+ /* Force stream valid */
+ return anx6345_set_bits(anx6345->map[I2C_IDX_DPTX],
+ SP_DP_SYSTEM_CTRL_BASE + 3,
+ SP_STRM_FORCE | SP_STRM_CTRL);
+}
+
+static int anx6345_get_downstream_info(struct anx6345 *anx6345)
+{
+ u8 value;
+ int err;
+
+ err = drm_dp_dpcd_readb(&anx6345->aux, DP_SINK_COUNT, &value);
+ if (err < 0) {
+ DRM_ERROR("Get sink count failed %d\n", err);
+ return err;
+ }
+
+ if (!DP_GET_SINK_COUNT(value)) {
+ DRM_ERROR("Downstream disconnected\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int anx6345_get_modes(struct drm_connector *connector)
+{
+ struct anx6345 *anx6345 = connector_to_anx6345(connector);
+ int err, num_modes = 0;
+ bool power_off = false;
+
+ mutex_lock(&anx6345->lock);
+
+ if (!anx6345->edid) {
+ if (!anx6345->powered) {
+ anx6345_poweron(anx6345);
+ power_off = true;
+ }
+
+ err = anx6345_get_downstream_info(anx6345);
+ if (err) {
+ DRM_ERROR("Failed to get downstream info: %d\n", err);
+ goto unlock;
+ }
+
+ anx6345->edid = drm_get_edid(connector, &anx6345->aux.ddc);
+ if (!anx6345->edid)
+ DRM_ERROR("Failed to read EDID from panel\n");
+
+ err = drm_connector_update_edid_property(connector,
+ anx6345->edid);
+ if (err) {
+ DRM_ERROR("Failed to update EDID property: %d\n", err);
+ goto unlock;
+ }
+ }
+
+ num_modes += drm_add_edid_modes(connector, anx6345->edid);
+
+ /* Driver currently supports only 6bpc */
+ connector->display_info.bpc = 6;
+
+unlock:
+ if (power_off)
+ anx6345_poweroff(anx6345);
+
+ mutex_unlock(&anx6345->lock);
+
+ if (!num_modes && anx6345->panel)
+ num_modes += drm_panel_get_modes(anx6345->panel, connector);
+
+ return num_modes;
+}
+
+static const struct drm_connector_helper_funcs anx6345_connector_helper_funcs = {
+ .get_modes = anx6345_get_modes,
+};
+
+static void
+anx6345_connector_destroy(struct drm_connector *connector)
+{
+ drm_connector_cleanup(connector);
+}
+
+static const struct drm_connector_funcs anx6345_connector_funcs = {
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = anx6345_connector_destroy,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int anx6345_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct anx6345 *anx6345 = bridge_to_anx6345(bridge);
+ int err;
+
+ if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) {
+ DRM_ERROR("Fix bridge driver to make connector optional!");
+ return -EINVAL;
+ }
+
+ if (!bridge->encoder) {
+ DRM_ERROR("Parent encoder object not found");
+ return -ENODEV;
+ }
+
+ /* Register aux channel */
+ anx6345->aux.name = "DP-AUX";
+ anx6345->aux.dev = &anx6345->client->dev;
+ anx6345->aux.drm_dev = bridge->dev;
+ anx6345->aux.transfer = anx6345_aux_transfer;
+
+ err = drm_dp_aux_register(&anx6345->aux);
+ if (err < 0) {
+ DRM_ERROR("Failed to register aux channel: %d\n", err);
+ return err;
+ }
+
+ err = drm_connector_init(bridge->dev, &anx6345->connector,
+ &anx6345_connector_funcs,
+ DRM_MODE_CONNECTOR_eDP);
+ if (err) {
+ DRM_ERROR("Failed to initialize connector: %d\n", err);
+ goto aux_unregister;
+ }
+
+ drm_connector_helper_add(&anx6345->connector,
+ &anx6345_connector_helper_funcs);
+
+ anx6345->connector.polled = DRM_CONNECTOR_POLL_HPD;
+
+ err = drm_connector_attach_encoder(&anx6345->connector,
+ bridge->encoder);
+ if (err) {
+ DRM_ERROR("Failed to link up connector to encoder: %d\n", err);
+ goto connector_cleanup;
+ }
+
+ err = drm_connector_register(&anx6345->connector);
+ if (err) {
+ DRM_ERROR("Failed to register connector: %d\n", err);
+ goto connector_cleanup;
+ }
+
+ return 0;
+connector_cleanup:
+ drm_connector_cleanup(&anx6345->connector);
+aux_unregister:
+ drm_dp_aux_unregister(&anx6345->aux);
+ return err;
+}
+
+static void anx6345_bridge_detach(struct drm_bridge *bridge)
+{
+ drm_dp_aux_unregister(&bridge_to_anx6345(bridge)->aux);
+}
+
+static enum drm_mode_status
+anx6345_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+ return MODE_NO_INTERLACE;
+
+ /* Max 1200p at 5.4 Ghz, one lane */
+ if (mode->clock > 154000)
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
+}
+
+static void anx6345_bridge_disable(struct drm_bridge *bridge)
+{
+ struct anx6345 *anx6345 = bridge_to_anx6345(bridge);
+
+ /* Power off all modules except configuration registers access */
+ anx6345_set_bits(anx6345->map[I2C_IDX_TXCOM], SP_POWERDOWN_CTRL_REG,
+ SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD | SP_LINK_PD);
+ if (anx6345->panel)
+ drm_panel_disable(anx6345->panel);
+
+ if (anx6345->powered)
+ anx6345_poweroff(anx6345);
+}
+
+static void anx6345_bridge_enable(struct drm_bridge *bridge)
+{
+ struct anx6345 *anx6345 = bridge_to_anx6345(bridge);
+ int err;
+
+ if (anx6345->panel)
+ drm_panel_enable(anx6345->panel);
+
+ err = anx6345_start(anx6345);
+ if (err) {
+ DRM_ERROR("Failed to initialize: %d\n", err);
+ return;
+ }
+
+ err = anx6345_config_dp_output(anx6345);
+ if (err)
+ DRM_ERROR("Failed to enable DP output: %d\n", err);
+}
+
+static const struct drm_bridge_funcs anx6345_bridge_funcs = {
+ .attach = anx6345_bridge_attach,
+ .detach = anx6345_bridge_detach,
+ .mode_valid = anx6345_bridge_mode_valid,
+ .disable = anx6345_bridge_disable,
+ .enable = anx6345_bridge_enable,
+};
+
+static void unregister_i2c_dummy_clients(struct anx6345 *anx6345)
+{
+ unsigned int i;
+
+ for (i = 1; i < ARRAY_SIZE(anx6345->i2c_clients); i++)
+ if (anx6345->i2c_clients[i] &&
+ anx6345->i2c_clients[i]->addr != anx6345->client->addr)
+ i2c_unregister_device(anx6345->i2c_clients[i]);
+}
+
+static const struct regmap_config anx6345_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0xff,
+ .cache_type = REGCACHE_NONE,
+};
+
+static const u16 anx6345_chipid_list[] = {
+ 0x6345,
+};
+
+static bool anx6345_get_chip_id(struct anx6345 *anx6345)
+{
+ unsigned int i, idl, idh, version;
+
+ if (regmap_read(anx6345->map[I2C_IDX_TXCOM], SP_DEVICE_IDL_REG, &idl))
+ return false;
+
+ if (regmap_read(anx6345->map[I2C_IDX_TXCOM], SP_DEVICE_IDH_REG, &idh))
+ return false;
+
+ anx6345->chipid = (u8)idl | ((u8)idh << 8);
+
+ if (regmap_read(anx6345->map[I2C_IDX_TXCOM], SP_DEVICE_VERSION_REG,
+ &version))
+ return false;
+
+ for (i = 0; i < ARRAY_SIZE(anx6345_chipid_list); i++) {
+ if (anx6345->chipid == anx6345_chipid_list[i]) {
+ DRM_INFO("Found ANX%x (ver. %d) eDP Transmitter\n",
+ anx6345->chipid, version);
+ return true;
+ }
+ }
+
+ DRM_ERROR("ANX%x (ver. %d) not supported by this driver\n",
+ anx6345->chipid, version);
+
+ return false;
+}
+
+static int anx6345_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct anx6345 *anx6345;
+ struct device *dev;
+ int i, err;
+
+ anx6345 = devm_kzalloc(&client->dev, sizeof(*anx6345), GFP_KERNEL);
+ if (!anx6345)
+ return -ENOMEM;
+
+ mutex_init(&anx6345->lock);
+
+ anx6345->bridge.of_node = client->dev.of_node;
+
+ anx6345->client = client;
+ i2c_set_clientdata(client, anx6345);
+
+ dev = &anx6345->client->dev;
+
+ err = drm_of_find_panel_or_bridge(client->dev.of_node, 1, 0,
+ &anx6345->panel, NULL);
+ if (err == -EPROBE_DEFER)
+ return err;
+
+ if (err)
+ DRM_DEBUG("No panel found\n");
+
+ /* 1.2V digital core power regulator */
+ anx6345->dvdd12 = devm_regulator_get(dev, "dvdd12");
+ if (IS_ERR(anx6345->dvdd12)) {
+ if (PTR_ERR(anx6345->dvdd12) != -EPROBE_DEFER)
+ DRM_ERROR("Failed to get dvdd12 supply (%ld)\n",
+ PTR_ERR(anx6345->dvdd12));
+ return PTR_ERR(anx6345->dvdd12);
+ }
+
+ /* 2.5V digital core power regulator */
+ anx6345->dvdd25 = devm_regulator_get(dev, "dvdd25");
+ if (IS_ERR(anx6345->dvdd25)) {
+ if (PTR_ERR(anx6345->dvdd25) != -EPROBE_DEFER)
+ DRM_ERROR("Failed to get dvdd25 supply (%ld)\n",
+ PTR_ERR(anx6345->dvdd25));
+ return PTR_ERR(anx6345->dvdd25);
+ }
+
+ /* GPIO for chip reset */
+ anx6345->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(anx6345->gpiod_reset)) {
+ DRM_ERROR("Reset gpio not found\n");
+ return PTR_ERR(anx6345->gpiod_reset);
+ }
+
+ /* Map slave addresses of ANX6345 */
+ for (i = 0; i < I2C_NUM_ADDRESSES; i++) {
+ if (anx6345_i2c_addresses[i] >> 1 != client->addr)
+ anx6345->i2c_clients[i] = i2c_new_dummy_device(client->adapter,
+ anx6345_i2c_addresses[i] >> 1);
+ else
+ anx6345->i2c_clients[i] = client;
+
+ if (IS_ERR(anx6345->i2c_clients[i])) {
+ err = PTR_ERR(anx6345->i2c_clients[i]);
+ DRM_ERROR("Failed to reserve I2C bus %02x\n",
+ anx6345_i2c_addresses[i]);
+ goto err_unregister_i2c;
+ }
+
+ anx6345->map[i] = devm_regmap_init_i2c(anx6345->i2c_clients[i],
+ &anx6345_regmap_config);
+ if (IS_ERR(anx6345->map[i])) {
+ err = PTR_ERR(anx6345->map[i]);
+ DRM_ERROR("Failed regmap initialization %02x\n",
+ anx6345_i2c_addresses[i]);
+ goto err_unregister_i2c;
+ }
+ }
+
+ /* Look for supported chip ID */
+ anx6345_poweron(anx6345);
+ if (anx6345_get_chip_id(anx6345)) {
+ anx6345->bridge.funcs = &anx6345_bridge_funcs;
+ drm_bridge_add(&anx6345->bridge);
+
+ return 0;
+ } else {
+ anx6345_poweroff(anx6345);
+ err = -ENODEV;
+ }
+
+err_unregister_i2c:
+ unregister_i2c_dummy_clients(anx6345);
+ return err;
+}
+
+static void anx6345_i2c_remove(struct i2c_client *client)
+{
+ struct anx6345 *anx6345 = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&anx6345->bridge);
+
+ unregister_i2c_dummy_clients(anx6345);
+
+ kfree(anx6345->edid);
+
+ mutex_destroy(&anx6345->lock);
+}
+
+static const struct i2c_device_id anx6345_id[] = {
+ { "anx6345", 0 },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, anx6345_id);
+
+static const struct of_device_id anx6345_match_table[] = {
+ { .compatible = "analogix,anx6345", },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, anx6345_match_table);
+
+static struct i2c_driver anx6345_driver = {
+ .driver = {
+ .name = "anx6345",
+ .of_match_table = of_match_ptr(anx6345_match_table),
+ },
+ .probe = anx6345_i2c_probe,
+ .remove = anx6345_i2c_remove,
+ .id_table = anx6345_id,
+};
+module_i2c_driver(anx6345_driver);
+
+MODULE_DESCRIPTION("ANX6345 eDP Transmitter driver");
+MODULE_AUTHOR("Icenowy Zheng <icenowy@aosc.io>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c b/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c
new file mode 100644
index 000000000..5997049fd
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c
@@ -0,0 +1,1401 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright(c) 2016, Analogix Semiconductor.
+ *
+ * Based on anx7808 driver obtained from chromeos with copyright:
+ * Copyright(c) 2013, Google Inc.
+ */
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/types.h>
+
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include "analogix-anx78xx.h"
+
+#define I2C_NUM_ADDRESSES 5
+#define I2C_IDX_TX_P0 0
+#define I2C_IDX_TX_P1 1
+#define I2C_IDX_TX_P2 2
+#define I2C_IDX_RX_P0 3
+#define I2C_IDX_RX_P1 4
+
+#define XTAL_CLK 270 /* 27M */
+
+static const u8 anx7808_i2c_addresses[] = {
+ [I2C_IDX_TX_P0] = 0x78,
+ [I2C_IDX_TX_P1] = 0x7a,
+ [I2C_IDX_TX_P2] = 0x72,
+ [I2C_IDX_RX_P0] = 0x7e,
+ [I2C_IDX_RX_P1] = 0x80,
+};
+
+static const u8 anx781x_i2c_addresses[] = {
+ [I2C_IDX_TX_P0] = 0x70,
+ [I2C_IDX_TX_P1] = 0x7a,
+ [I2C_IDX_TX_P2] = 0x72,
+ [I2C_IDX_RX_P0] = 0x7e,
+ [I2C_IDX_RX_P1] = 0x80,
+};
+
+struct anx78xx_platform_data {
+ struct regulator *dvdd10;
+ struct gpio_desc *gpiod_hpd;
+ struct gpio_desc *gpiod_pd;
+ struct gpio_desc *gpiod_reset;
+
+ int hpd_irq;
+ int intp_irq;
+};
+
+struct anx78xx {
+ struct drm_dp_aux aux;
+ struct drm_bridge bridge;
+ struct i2c_client *client;
+ struct edid *edid;
+ struct drm_connector connector;
+ struct anx78xx_platform_data pdata;
+ struct mutex lock;
+
+ /*
+ * I2C Slave addresses of ANX7814 are mapped as TX_P0, TX_P1, TX_P2,
+ * RX_P0 and RX_P1.
+ */
+ struct i2c_client *i2c_dummy[I2C_NUM_ADDRESSES];
+ struct regmap *map[I2C_NUM_ADDRESSES];
+
+ u16 chipid;
+ u8 dpcd[DP_RECEIVER_CAP_SIZE];
+
+ bool powered;
+};
+
+static inline struct anx78xx *connector_to_anx78xx(struct drm_connector *c)
+{
+ return container_of(c, struct anx78xx, connector);
+}
+
+static inline struct anx78xx *bridge_to_anx78xx(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct anx78xx, bridge);
+}
+
+static int anx78xx_set_bits(struct regmap *map, u8 reg, u8 mask)
+{
+ return regmap_update_bits(map, reg, mask, mask);
+}
+
+static int anx78xx_clear_bits(struct regmap *map, u8 reg, u8 mask)
+{
+ return regmap_update_bits(map, reg, mask, 0);
+}
+
+static ssize_t anx78xx_aux_transfer(struct drm_dp_aux *aux,
+ struct drm_dp_aux_msg *msg)
+{
+ struct anx78xx *anx78xx = container_of(aux, struct anx78xx, aux);
+ return anx_dp_aux_transfer(anx78xx->map[I2C_IDX_TX_P0], msg);
+}
+
+static int anx78xx_set_hpd(struct anx78xx *anx78xx)
+{
+ int err;
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_RX_P0],
+ SP_TMDS_CTRL_BASE + 7, SP_PD_RT);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL3_REG,
+ SP_HPD_OUT);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static int anx78xx_clear_hpd(struct anx78xx *anx78xx)
+{
+ int err;
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL3_REG,
+ SP_HPD_OUT);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
+ SP_TMDS_CTRL_BASE + 7, SP_PD_RT);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static const struct reg_sequence tmds_phy_initialization[] = {
+ { SP_TMDS_CTRL_BASE + 1, 0x90 },
+ { SP_TMDS_CTRL_BASE + 2, 0xa9 },
+ { SP_TMDS_CTRL_BASE + 6, 0x92 },
+ { SP_TMDS_CTRL_BASE + 7, 0x80 },
+ { SP_TMDS_CTRL_BASE + 20, 0xf2 },
+ { SP_TMDS_CTRL_BASE + 22, 0xc4 },
+ { SP_TMDS_CTRL_BASE + 23, 0x18 },
+};
+
+static int anx78xx_rx_initialization(struct anx78xx *anx78xx)
+{
+ int err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_RX_P0], SP_HDMI_MUTE_CTRL_REG,
+ SP_AUD_MUTE | SP_VID_MUTE);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0], SP_CHIP_CTRL_REG,
+ SP_MAN_HDMI5V_DET | SP_PLLLOCK_CKDT_EN |
+ SP_DIGITAL_CKDT_EN);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
+ SP_SOFTWARE_RESET1_REG, SP_HDCP_MAN_RST |
+ SP_SW_MAN_RST | SP_TMDS_RST | SP_VIDEO_RST);
+ if (err)
+ return err;
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_RX_P0],
+ SP_SOFTWARE_RESET1_REG, SP_HDCP_MAN_RST |
+ SP_SW_MAN_RST | SP_TMDS_RST | SP_VIDEO_RST);
+ if (err)
+ return err;
+
+ /* Sync detect change, GP set mute */
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
+ SP_AUD_EXCEPTION_ENABLE_BASE + 1, BIT(5) |
+ BIT(6));
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
+ SP_AUD_EXCEPTION_ENABLE_BASE + 3,
+ SP_AEC_EN21);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0], SP_AUDVID_CTRL_REG,
+ SP_AVC_EN | SP_AAC_OE | SP_AAC_EN);
+ if (err)
+ return err;
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_RX_P0],
+ SP_SYSTEM_POWER_DOWN1_REG, SP_PWDN_CTRL);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
+ SP_VID_DATA_RANGE_CTRL_REG, SP_R2Y_INPUT_LIMIT);
+ if (err)
+ return err;
+
+ /* Enable DDC stretch */
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_EXTRA_I2C_DEV_ADDR_REG, SP_I2C_EXTRA_ADDR);
+ if (err)
+ return err;
+
+ /* TMDS phy initialization */
+ err = regmap_multi_reg_write(anx78xx->map[I2C_IDX_RX_P0],
+ tmds_phy_initialization,
+ ARRAY_SIZE(tmds_phy_initialization));
+ if (err)
+ return err;
+
+ err = anx78xx_clear_hpd(anx78xx);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static const u8 dp_tx_output_precise_tune_bits[20] = {
+ 0x01, 0x03, 0x07, 0x7f, 0x71, 0x6b, 0x7f,
+ 0x73, 0x7f, 0x7f, 0x00, 0x00, 0x00, 0x00,
+ 0x0c, 0x42, 0x1e, 0x3e, 0x72, 0x7e,
+};
+
+static int anx78xx_link_phy_initialization(struct anx78xx *anx78xx)
+{
+ int err;
+
+ /*
+ * REVISIT : It is writing to a RESERVED bits in Analog Control 0
+ * register.
+ */
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_ANALOG_CTRL0_REG,
+ 0x02);
+ if (err)
+ return err;
+
+ /*
+ * Write DP TX output emphasis precise tune bits.
+ */
+ err = regmap_bulk_write(anx78xx->map[I2C_IDX_TX_P1],
+ SP_DP_TX_LT_CTRL0_REG,
+ dp_tx_output_precise_tune_bits,
+ ARRAY_SIZE(dp_tx_output_precise_tune_bits));
+
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static int anx78xx_xtal_clk_sel(struct anx78xx *anx78xx)
+{
+ unsigned int value;
+ int err;
+
+ err = regmap_update_bits(anx78xx->map[I2C_IDX_TX_P2],
+ SP_ANALOG_DEBUG2_REG,
+ SP_XTAL_FRQ | SP_FORCE_SW_OFF_BYPASS,
+ SP_XTAL_FRQ_27M);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_AUX_CH_CTRL3_REG,
+ XTAL_CLK & SP_WAIT_COUNTER_7_0_MASK);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_AUX_CH_CTRL4_REG,
+ ((XTAL_CLK & 0xff00) >> 2) | (XTAL_CLK / 10));
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+ SP_I2C_GEN_10US_TIMER0_REG, XTAL_CLK & 0xff);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+ SP_I2C_GEN_10US_TIMER1_REG,
+ (XTAL_CLK & 0xff00) >> 8);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_AUX_MISC_CTRL_REG,
+ XTAL_CLK / 10 - 1);
+ if (err)
+ return err;
+
+ err = regmap_read(anx78xx->map[I2C_IDX_RX_P0],
+ SP_HDMI_US_TIMER_CTRL_REG,
+ &value);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_RX_P0],
+ SP_HDMI_US_TIMER_CTRL_REG,
+ (value & SP_MS_TIMER_MARGIN_10_8_MASK) |
+ ((((XTAL_CLK / 10) >> 1) - 2) << 3));
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static const struct reg_sequence otp_key_protect[] = {
+ { SP_OTP_KEY_PROTECT1_REG, SP_OTP_PSW1 },
+ { SP_OTP_KEY_PROTECT2_REG, SP_OTP_PSW2 },
+ { SP_OTP_KEY_PROTECT3_REG, SP_OTP_PSW3 },
+};
+
+static int anx78xx_tx_initialization(struct anx78xx *anx78xx)
+{
+ int err;
+
+ /* Set terminal resistor to 50 ohm */
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_AUX_CH_CTRL2_REG,
+ 0x30);
+ if (err)
+ return err;
+
+ /* Enable aux double diff output */
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_AUX_CH_CTRL2_REG, 0x08);
+ if (err)
+ return err;
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_HDCP_CTRL_REG, SP_AUTO_EN |
+ SP_AUTO_START);
+ if (err)
+ return err;
+
+ err = regmap_multi_reg_write(anx78xx->map[I2C_IDX_TX_P0],
+ otp_key_protect,
+ ARRAY_SIZE(otp_key_protect));
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_HDCP_KEY_COMMAND_REG, SP_DISABLE_SYNC_HDCP);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL8_REG,
+ SP_VID_VRES_TH);
+ if (err)
+ return err;
+
+ /*
+ * DP HDCP auto authentication wait timer (when downstream starts to
+ * auth, DP side will wait for this period then do auth automatically)
+ */
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_HDCP_AUTO_TIMER_REG,
+ 0x00);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_HDCP_CTRL_REG, SP_LINK_POLLING);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_LINK_DEBUG_CTRL_REG, SP_M_VID_DEBUG);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2],
+ SP_ANALOG_DEBUG2_REG, SP_POWERON_TIME_1P5MS);
+ if (err)
+ return err;
+
+ err = anx78xx_xtal_clk_sel(anx78xx);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_AUX_DEFER_CTRL_REG,
+ SP_DEFER_CTRL_EN | 0x0c);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_POLLING_CTRL_REG,
+ SP_AUTO_POLLING_DISABLE);
+ if (err)
+ return err;
+
+ /*
+ * Short the link integrity check timer to speed up bstatus
+ * polling for HDCP CTS item 1A-07
+ */
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+ SP_HDCP_LINK_CHECK_TIMER_REG, 0x1d);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_MISC_CTRL_REG, SP_EQ_TRAINING_LOOP);
+ if (err)
+ return err;
+
+ /* Power down the main link by default */
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_ANALOG_POWER_DOWN_REG, SP_CH0_PD);
+ if (err)
+ return err;
+
+ err = anx78xx_link_phy_initialization(anx78xx);
+ if (err)
+ return err;
+
+ /* Gen m_clk with downspreading */
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_M_CALCULATION_CTRL_REG, SP_M_GEN_CLK_SEL);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static int anx78xx_enable_interrupts(struct anx78xx *anx78xx)
+{
+ int err;
+
+ /*
+ * BIT0: INT pin assertion polarity: 1 = assert high
+ * BIT1: INT pin output type: 0 = push/pull
+ */
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_INT_CTRL_REG, 0x01);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P2],
+ SP_COMMON_INT_MASK4_REG, SP_HPD_LOST | SP_HPD_PLUG);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_DP_INT_MASK1_REG,
+ SP_TRAINING_FINISH);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_RX_P0], SP_INT_MASK1_REG,
+ SP_CKDT_CHG | SP_SCDT_CHG);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static void anx78xx_poweron(struct anx78xx *anx78xx)
+{
+ struct anx78xx_platform_data *pdata = &anx78xx->pdata;
+ int err;
+
+ if (WARN_ON(anx78xx->powered))
+ return;
+
+ if (pdata->dvdd10) {
+ err = regulator_enable(pdata->dvdd10);
+ if (err) {
+ DRM_ERROR("Failed to enable DVDD10 regulator: %d\n",
+ err);
+ return;
+ }
+
+ usleep_range(1000, 2000);
+ }
+
+ gpiod_set_value_cansleep(pdata->gpiod_reset, 1);
+ usleep_range(1000, 2000);
+
+ gpiod_set_value_cansleep(pdata->gpiod_pd, 0);
+ usleep_range(1000, 2000);
+
+ gpiod_set_value_cansleep(pdata->gpiod_reset, 0);
+
+ /* Power on registers module */
+ anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_POWERDOWN_CTRL_REG,
+ SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD | SP_LINK_PD);
+ anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2], SP_POWERDOWN_CTRL_REG,
+ SP_REGISTER_PD | SP_TOTAL_PD);
+
+ anx78xx->powered = true;
+}
+
+static void anx78xx_poweroff(struct anx78xx *anx78xx)
+{
+ struct anx78xx_platform_data *pdata = &anx78xx->pdata;
+ int err;
+
+ if (WARN_ON(!anx78xx->powered))
+ return;
+
+ gpiod_set_value_cansleep(pdata->gpiod_reset, 1);
+ usleep_range(1000, 2000);
+
+ gpiod_set_value_cansleep(pdata->gpiod_pd, 1);
+ usleep_range(1000, 2000);
+
+ if (pdata->dvdd10) {
+ err = regulator_disable(pdata->dvdd10);
+ if (err) {
+ DRM_ERROR("Failed to disable DVDD10 regulator: %d\n",
+ err);
+ return;
+ }
+
+ usleep_range(1000, 2000);
+ }
+
+ anx78xx->powered = false;
+}
+
+static int anx78xx_start(struct anx78xx *anx78xx)
+{
+ int err;
+
+ /* Power on all modules */
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2],
+ SP_POWERDOWN_CTRL_REG,
+ SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD |
+ SP_LINK_PD);
+
+ err = anx78xx_enable_interrupts(anx78xx);
+ if (err) {
+ DRM_ERROR("Failed to enable interrupts: %d\n", err);
+ goto err_poweroff;
+ }
+
+ err = anx78xx_rx_initialization(anx78xx);
+ if (err) {
+ DRM_ERROR("Failed receiver initialization: %d\n", err);
+ goto err_poweroff;
+ }
+
+ err = anx78xx_tx_initialization(anx78xx);
+ if (err) {
+ DRM_ERROR("Failed transmitter initialization: %d\n", err);
+ goto err_poweroff;
+ }
+
+ /*
+ * This delay seems to help keep the hardware in a good state. Without
+ * it, there are times where it fails silently.
+ */
+ usleep_range(10000, 15000);
+
+ return 0;
+
+err_poweroff:
+ DRM_ERROR("Failed SlimPort transmitter initialization: %d\n", err);
+ anx78xx_poweroff(anx78xx);
+
+ return err;
+}
+
+static int anx78xx_init_pdata(struct anx78xx *anx78xx)
+{
+ struct anx78xx_platform_data *pdata = &anx78xx->pdata;
+ struct device *dev = &anx78xx->client->dev;
+
+ /* 1.0V digital core power regulator */
+ pdata->dvdd10 = devm_regulator_get(dev, "dvdd10");
+ if (IS_ERR(pdata->dvdd10)) {
+ if (PTR_ERR(pdata->dvdd10) != -EPROBE_DEFER)
+ DRM_ERROR("DVDD10 regulator not found\n");
+
+ return PTR_ERR(pdata->dvdd10);
+ }
+
+ /* GPIO for HPD */
+ pdata->gpiod_hpd = devm_gpiod_get(dev, "hpd", GPIOD_IN);
+ if (IS_ERR(pdata->gpiod_hpd))
+ return PTR_ERR(pdata->gpiod_hpd);
+
+ /* GPIO for chip power down */
+ pdata->gpiod_pd = devm_gpiod_get(dev, "pd", GPIOD_OUT_HIGH);
+ if (IS_ERR(pdata->gpiod_pd))
+ return PTR_ERR(pdata->gpiod_pd);
+
+ /* GPIO for chip reset */
+ pdata->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+
+ return PTR_ERR_OR_ZERO(pdata->gpiod_reset);
+}
+
+static int anx78xx_dp_link_training(struct anx78xx *anx78xx)
+{
+ u8 dp_bw, dpcd[2];
+ int err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_RX_P0], SP_HDMI_MUTE_CTRL_REG,
+ 0x0);
+ if (err)
+ return err;
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2],
+ SP_POWERDOWN_CTRL_REG,
+ SP_TOTAL_PD);
+ if (err)
+ return err;
+
+ err = drm_dp_dpcd_readb(&anx78xx->aux, DP_MAX_LINK_RATE, &dp_bw);
+ if (err < 0)
+ return err;
+
+ switch (dp_bw) {
+ case DP_LINK_BW_1_62:
+ case DP_LINK_BW_2_7:
+ case DP_LINK_BW_5_4:
+ break;
+
+ default:
+ DRM_DEBUG_KMS("DP bandwidth (%#02x) not supported\n", dp_bw);
+ return -EINVAL;
+ }
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL1_REG,
+ SP_VIDEO_MUTE);
+ if (err)
+ return err;
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2],
+ SP_VID_CTRL1_REG, SP_VIDEO_EN);
+ if (err)
+ return err;
+
+ /* Get DPCD info */
+ err = drm_dp_dpcd_read(&anx78xx->aux, DP_DPCD_REV,
+ &anx78xx->dpcd, DP_RECEIVER_CAP_SIZE);
+ if (err < 0) {
+ DRM_ERROR("Failed to read DPCD: %d\n", err);
+ return err;
+ }
+
+ /* Clear channel x SERDES power down */
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_ANALOG_POWER_DOWN_REG, SP_CH0_PD);
+ if (err)
+ return err;
+
+ /*
+ * Power up the sink (DP_SET_POWER register is only available on DPCD
+ * v1.1 and later).
+ */
+ if (anx78xx->dpcd[DP_DPCD_REV] >= 0x11) {
+ err = drm_dp_dpcd_readb(&anx78xx->aux, DP_SET_POWER, &dpcd[0]);
+ if (err < 0) {
+ DRM_ERROR("Failed to read DP_SET_POWER register: %d\n",
+ err);
+ return err;
+ }
+
+ dpcd[0] &= ~DP_SET_POWER_MASK;
+ dpcd[0] |= DP_SET_POWER_D0;
+
+ err = drm_dp_dpcd_writeb(&anx78xx->aux, DP_SET_POWER, dpcd[0]);
+ if (err < 0) {
+ DRM_ERROR("Failed to power up DisplayPort link: %d\n",
+ err);
+ return err;
+ }
+
+ /*
+ * According to the DP 1.1 specification, a "Sink Device must
+ * exit the power saving state within 1 ms" (Section 2.5.3.1,
+ * Table 5-52, "Sink Control Field" (register 0x600).
+ */
+ usleep_range(1000, 2000);
+ }
+
+ /* Possibly enable downspread on the sink */
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_DOWNSPREAD_CTRL1_REG, 0);
+ if (err)
+ return err;
+
+ if (anx78xx->dpcd[DP_MAX_DOWNSPREAD] & DP_MAX_DOWNSPREAD_0_5) {
+ DRM_DEBUG("Enable downspread on the sink\n");
+ /* 4000PPM */
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_DOWNSPREAD_CTRL1_REG, 8);
+ if (err)
+ return err;
+
+ err = drm_dp_dpcd_writeb(&anx78xx->aux, DP_DOWNSPREAD_CTRL,
+ DP_SPREAD_AMP_0_5);
+ if (err < 0)
+ return err;
+ } else {
+ err = drm_dp_dpcd_writeb(&anx78xx->aux, DP_DOWNSPREAD_CTRL, 0);
+ if (err < 0)
+ return err;
+ }
+
+ /* Set the lane count and the link rate on the sink */
+ if (drm_dp_enhanced_frame_cap(anx78xx->dpcd))
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_SYSTEM_CTRL_BASE + 4,
+ SP_ENHANCED_MODE);
+ else
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_SYSTEM_CTRL_BASE + 4,
+ SP_ENHANCED_MODE);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_MAIN_LINK_BW_SET_REG,
+ anx78xx->dpcd[DP_MAX_LINK_RATE]);
+ if (err)
+ return err;
+
+ dpcd[1] = drm_dp_max_lane_count(anx78xx->dpcd);
+
+ if (drm_dp_enhanced_frame_cap(anx78xx->dpcd))
+ dpcd[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
+
+ err = drm_dp_dpcd_write(&anx78xx->aux, DP_LINK_BW_SET, dpcd,
+ sizeof(dpcd));
+ if (err < 0) {
+ DRM_ERROR("Failed to configure link: %d\n", err);
+ return err;
+ }
+
+ /* Start training on the source */
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_LT_CTRL_REG,
+ SP_LT_EN);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static int anx78xx_config_dp_output(struct anx78xx *anx78xx)
+{
+ int err;
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL1_REG,
+ SP_VIDEO_MUTE);
+ if (err)
+ return err;
+
+ /* Enable DP output */
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL1_REG,
+ SP_VIDEO_EN);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static int anx78xx_send_video_infoframe(struct anx78xx *anx78xx,
+ struct hdmi_avi_infoframe *frame)
+{
+ u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];
+ int err;
+
+ err = hdmi_avi_infoframe_pack(frame, buffer, sizeof(buffer));
+ if (err < 0) {
+ DRM_ERROR("Failed to pack AVI infoframe: %d\n", err);
+ return err;
+ }
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_PACKET_SEND_CTRL_REG, SP_AVI_IF_EN);
+ if (err)
+ return err;
+
+ err = regmap_bulk_write(anx78xx->map[I2C_IDX_TX_P2],
+ SP_INFOFRAME_AVI_DB1_REG, buffer,
+ frame->length);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_PACKET_SEND_CTRL_REG, SP_AVI_IF_UD);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_PACKET_SEND_CTRL_REG, SP_AVI_IF_EN);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static int anx78xx_get_downstream_info(struct anx78xx *anx78xx)
+{
+ u8 value;
+ int err;
+
+ err = drm_dp_dpcd_readb(&anx78xx->aux, DP_SINK_COUNT, &value);
+ if (err < 0) {
+ DRM_ERROR("Get sink count failed %d\n", err);
+ return err;
+ }
+
+ if (!DP_GET_SINK_COUNT(value)) {
+ DRM_ERROR("Downstream disconnected\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int anx78xx_get_modes(struct drm_connector *connector)
+{
+ struct anx78xx *anx78xx = connector_to_anx78xx(connector);
+ int err, num_modes = 0;
+
+ if (WARN_ON(!anx78xx->powered))
+ return 0;
+
+ if (anx78xx->edid)
+ return drm_add_edid_modes(connector, anx78xx->edid);
+
+ mutex_lock(&anx78xx->lock);
+
+ err = anx78xx_get_downstream_info(anx78xx);
+ if (err) {
+ DRM_ERROR("Failed to get downstream info: %d\n", err);
+ goto unlock;
+ }
+
+ anx78xx->edid = drm_get_edid(connector, &anx78xx->aux.ddc);
+ if (!anx78xx->edid) {
+ DRM_ERROR("Failed to read EDID\n");
+ goto unlock;
+ }
+
+ err = drm_connector_update_edid_property(connector,
+ anx78xx->edid);
+ if (err) {
+ DRM_ERROR("Failed to update EDID property: %d\n", err);
+ goto unlock;
+ }
+
+ num_modes = drm_add_edid_modes(connector, anx78xx->edid);
+
+unlock:
+ mutex_unlock(&anx78xx->lock);
+
+ return num_modes;
+}
+
+static const struct drm_connector_helper_funcs anx78xx_connector_helper_funcs = {
+ .get_modes = anx78xx_get_modes,
+};
+
+static enum drm_connector_status anx78xx_detect(struct drm_connector *connector,
+ bool force)
+{
+ struct anx78xx *anx78xx = connector_to_anx78xx(connector);
+
+ if (!gpiod_get_value(anx78xx->pdata.gpiod_hpd))
+ return connector_status_disconnected;
+
+ return connector_status_connected;
+}
+
+static const struct drm_connector_funcs anx78xx_connector_funcs = {
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .detect = anx78xx_detect,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int anx78xx_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct anx78xx *anx78xx = bridge_to_anx78xx(bridge);
+ int err;
+
+ if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) {
+ DRM_ERROR("Fix bridge driver to make connector optional!");
+ return -EINVAL;
+ }
+
+ if (!bridge->encoder) {
+ DRM_ERROR("Parent encoder object not found");
+ return -ENODEV;
+ }
+
+ /* Register aux channel */
+ anx78xx->aux.name = "DP-AUX";
+ anx78xx->aux.dev = &anx78xx->client->dev;
+ anx78xx->aux.drm_dev = bridge->dev;
+ anx78xx->aux.transfer = anx78xx_aux_transfer;
+
+ err = drm_dp_aux_register(&anx78xx->aux);
+ if (err < 0) {
+ DRM_ERROR("Failed to register aux channel: %d\n", err);
+ return err;
+ }
+
+ err = drm_connector_init(bridge->dev, &anx78xx->connector,
+ &anx78xx_connector_funcs,
+ DRM_MODE_CONNECTOR_DisplayPort);
+ if (err) {
+ DRM_ERROR("Failed to initialize connector: %d\n", err);
+ goto aux_unregister;
+ }
+
+ drm_connector_helper_add(&anx78xx->connector,
+ &anx78xx_connector_helper_funcs);
+
+ anx78xx->connector.polled = DRM_CONNECTOR_POLL_HPD;
+
+ err = drm_connector_attach_encoder(&anx78xx->connector,
+ bridge->encoder);
+ if (err) {
+ DRM_ERROR("Failed to link up connector to encoder: %d\n", err);
+ goto connector_cleanup;
+ }
+
+ err = drm_connector_register(&anx78xx->connector);
+ if (err) {
+ DRM_ERROR("Failed to register connector: %d\n", err);
+ goto connector_cleanup;
+ }
+
+ return 0;
+connector_cleanup:
+ drm_connector_cleanup(&anx78xx->connector);
+aux_unregister:
+ drm_dp_aux_unregister(&anx78xx->aux);
+ return err;
+}
+
+static void anx78xx_bridge_detach(struct drm_bridge *bridge)
+{
+ drm_dp_aux_unregister(&bridge_to_anx78xx(bridge)->aux);
+}
+
+static enum drm_mode_status
+anx78xx_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+ return MODE_NO_INTERLACE;
+
+ /* Max 1200p at 5.4 Ghz, one lane */
+ if (mode->clock > 154000)
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
+}
+
+static void anx78xx_bridge_disable(struct drm_bridge *bridge)
+{
+ struct anx78xx *anx78xx = bridge_to_anx78xx(bridge);
+
+ /* Power off all modules except configuration registers access */
+ anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_POWERDOWN_CTRL_REG,
+ SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD | SP_LINK_PD);
+}
+
+static void anx78xx_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ struct anx78xx *anx78xx = bridge_to_anx78xx(bridge);
+ struct hdmi_avi_infoframe frame;
+ int err;
+
+ if (WARN_ON(!anx78xx->powered))
+ return;
+
+ mutex_lock(&anx78xx->lock);
+
+ err = drm_hdmi_avi_infoframe_from_display_mode(&frame,
+ &anx78xx->connector,
+ adjusted_mode);
+ if (err) {
+ DRM_ERROR("Failed to setup AVI infoframe: %d\n", err);
+ goto unlock;
+ }
+
+ err = anx78xx_send_video_infoframe(anx78xx, &frame);
+ if (err)
+ DRM_ERROR("Failed to send AVI infoframe: %d\n", err);
+
+unlock:
+ mutex_unlock(&anx78xx->lock);
+}
+
+static void anx78xx_bridge_enable(struct drm_bridge *bridge)
+{
+ struct anx78xx *anx78xx = bridge_to_anx78xx(bridge);
+ int err;
+
+ err = anx78xx_start(anx78xx);
+ if (err) {
+ DRM_ERROR("Failed to initialize: %d\n", err);
+ return;
+ }
+
+ err = anx78xx_set_hpd(anx78xx);
+ if (err)
+ DRM_ERROR("Failed to set HPD: %d\n", err);
+}
+
+static const struct drm_bridge_funcs anx78xx_bridge_funcs = {
+ .attach = anx78xx_bridge_attach,
+ .detach = anx78xx_bridge_detach,
+ .mode_valid = anx78xx_bridge_mode_valid,
+ .disable = anx78xx_bridge_disable,
+ .mode_set = anx78xx_bridge_mode_set,
+ .enable = anx78xx_bridge_enable,
+};
+
+static irqreturn_t anx78xx_hpd_threaded_handler(int irq, void *data)
+{
+ struct anx78xx *anx78xx = data;
+ int err;
+
+ if (anx78xx->powered)
+ return IRQ_HANDLED;
+
+ mutex_lock(&anx78xx->lock);
+
+ /* Cable is pulled, power on the chip */
+ anx78xx_poweron(anx78xx);
+
+ err = anx78xx_enable_interrupts(anx78xx);
+ if (err)
+ DRM_ERROR("Failed to enable interrupts: %d\n", err);
+
+ mutex_unlock(&anx78xx->lock);
+
+ return IRQ_HANDLED;
+}
+
+static int anx78xx_handle_dp_int_1(struct anx78xx *anx78xx, u8 irq)
+{
+ int err;
+
+ DRM_DEBUG_KMS("Handle DP interrupt 1: %02x\n", irq);
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_DP_INT_STATUS1_REG,
+ irq);
+ if (err)
+ return err;
+
+ if (irq & SP_TRAINING_FINISH) {
+ DRM_DEBUG_KMS("IRQ: hardware link training finished\n");
+ err = anx78xx_config_dp_output(anx78xx);
+ }
+
+ return err;
+}
+
+static bool anx78xx_handle_common_int_4(struct anx78xx *anx78xx, u8 irq)
+{
+ bool event = false;
+ int err;
+
+ DRM_DEBUG_KMS("Handle common interrupt 4: %02x\n", irq);
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P2],
+ SP_COMMON_INT_STATUS4_REG, irq);
+ if (err) {
+ DRM_ERROR("Failed to write SP_COMMON_INT_STATUS4 %d\n", err);
+ return event;
+ }
+
+ if (irq & SP_HPD_LOST) {
+ DRM_DEBUG_KMS("IRQ: Hot plug detect - cable is pulled out\n");
+ event = true;
+ anx78xx_poweroff(anx78xx);
+ /* Free cached EDID */
+ kfree(anx78xx->edid);
+ anx78xx->edid = NULL;
+ } else if (irq & SP_HPD_PLUG) {
+ DRM_DEBUG_KMS("IRQ: Hot plug detect - cable plug\n");
+ event = true;
+ }
+
+ return event;
+}
+
+static void anx78xx_handle_hdmi_int_1(struct anx78xx *anx78xx, u8 irq)
+{
+ unsigned int value;
+ int err;
+
+ DRM_DEBUG_KMS("Handle HDMI interrupt 1: %02x\n", irq);
+
+ err = regmap_write(anx78xx->map[I2C_IDX_RX_P0], SP_INT_STATUS1_REG,
+ irq);
+ if (err) {
+ DRM_ERROR("Write HDMI int 1 failed: %d\n", err);
+ return;
+ }
+
+ if ((irq & SP_CKDT_CHG) || (irq & SP_SCDT_CHG)) {
+ DRM_DEBUG_KMS("IRQ: HDMI input detected\n");
+
+ err = regmap_read(anx78xx->map[I2C_IDX_RX_P0],
+ SP_SYSTEM_STATUS_REG, &value);
+ if (err) {
+ DRM_ERROR("Read system status reg failed: %d\n", err);
+ return;
+ }
+
+ if (!(value & SP_TMDS_CLOCK_DET)) {
+ DRM_DEBUG_KMS("IRQ: *** Waiting for HDMI clock ***\n");
+ return;
+ }
+
+ if (!(value & SP_TMDS_DE_DET)) {
+ DRM_DEBUG_KMS("IRQ: *** Waiting for HDMI signal ***\n");
+ return;
+ }
+
+ err = anx78xx_dp_link_training(anx78xx);
+ if (err)
+ DRM_ERROR("Failed to start link training: %d\n", err);
+ }
+}
+
+static irqreturn_t anx78xx_intp_threaded_handler(int unused, void *data)
+{
+ struct anx78xx *anx78xx = data;
+ bool event = false;
+ unsigned int irq;
+ int err;
+
+ mutex_lock(&anx78xx->lock);
+
+ err = regmap_read(anx78xx->map[I2C_IDX_TX_P2], SP_DP_INT_STATUS1_REG,
+ &irq);
+ if (err) {
+ DRM_ERROR("Failed to read DP interrupt 1 status: %d\n", err);
+ goto unlock;
+ }
+
+ if (irq)
+ anx78xx_handle_dp_int_1(anx78xx, irq);
+
+ err = regmap_read(anx78xx->map[I2C_IDX_TX_P2],
+ SP_COMMON_INT_STATUS4_REG, &irq);
+ if (err) {
+ DRM_ERROR("Failed to read common interrupt 4 status: %d\n",
+ err);
+ goto unlock;
+ }
+
+ if (irq)
+ event = anx78xx_handle_common_int_4(anx78xx, irq);
+
+ /* Make sure we are still powered after handle HPD events */
+ if (!anx78xx->powered)
+ goto unlock;
+
+ err = regmap_read(anx78xx->map[I2C_IDX_RX_P0], SP_INT_STATUS1_REG,
+ &irq);
+ if (err) {
+ DRM_ERROR("Failed to read HDMI int 1 status: %d\n", err);
+ goto unlock;
+ }
+
+ if (irq)
+ anx78xx_handle_hdmi_int_1(anx78xx, irq);
+
+unlock:
+ mutex_unlock(&anx78xx->lock);
+
+ if (event)
+ drm_helper_hpd_irq_event(anx78xx->connector.dev);
+
+ return IRQ_HANDLED;
+}
+
+static void unregister_i2c_dummy_clients(struct anx78xx *anx78xx)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(anx78xx->i2c_dummy); i++)
+ i2c_unregister_device(anx78xx->i2c_dummy[i]);
+}
+
+static const struct regmap_config anx78xx_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static const u16 anx78xx_chipid_list[] = {
+ 0x7808,
+ 0x7812,
+ 0x7814,
+ 0x7818,
+};
+
+static int anx78xx_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct anx78xx *anx78xx;
+ struct anx78xx_platform_data *pdata;
+ unsigned int i, idl, idh, version;
+ const u8 *i2c_addresses;
+ bool found = false;
+ int err;
+
+ anx78xx = devm_kzalloc(&client->dev, sizeof(*anx78xx), GFP_KERNEL);
+ if (!anx78xx)
+ return -ENOMEM;
+
+ pdata = &anx78xx->pdata;
+
+ mutex_init(&anx78xx->lock);
+
+#if IS_ENABLED(CONFIG_OF)
+ anx78xx->bridge.of_node = client->dev.of_node;
+#endif
+
+ anx78xx->client = client;
+ i2c_set_clientdata(client, anx78xx);
+
+ err = anx78xx_init_pdata(anx78xx);
+ if (err) {
+ if (err != -EPROBE_DEFER)
+ DRM_ERROR("Failed to initialize pdata: %d\n", err);
+
+ return err;
+ }
+
+ pdata->hpd_irq = gpiod_to_irq(pdata->gpiod_hpd);
+ if (pdata->hpd_irq < 0) {
+ DRM_ERROR("Failed to get HPD IRQ: %d\n", pdata->hpd_irq);
+ return -ENODEV;
+ }
+
+ pdata->intp_irq = client->irq;
+ if (!pdata->intp_irq) {
+ DRM_ERROR("Failed to get CABLE_DET and INTP IRQ\n");
+ return -ENODEV;
+ }
+
+ /* Map slave addresses of ANX7814 */
+ i2c_addresses = device_get_match_data(&client->dev);
+ for (i = 0; i < I2C_NUM_ADDRESSES; i++) {
+ struct i2c_client *i2c_dummy;
+
+ i2c_dummy = i2c_new_dummy_device(client->adapter,
+ i2c_addresses[i] >> 1);
+ if (IS_ERR(i2c_dummy)) {
+ err = PTR_ERR(i2c_dummy);
+ DRM_ERROR("Failed to reserve I2C bus %02x: %d\n",
+ i2c_addresses[i], err);
+ goto err_unregister_i2c;
+ }
+
+ anx78xx->i2c_dummy[i] = i2c_dummy;
+ anx78xx->map[i] = devm_regmap_init_i2c(anx78xx->i2c_dummy[i],
+ &anx78xx_regmap_config);
+ if (IS_ERR(anx78xx->map[i])) {
+ err = PTR_ERR(anx78xx->map[i]);
+ DRM_ERROR("Failed regmap initialization %02x\n",
+ i2c_addresses[i]);
+ goto err_unregister_i2c;
+ }
+ }
+
+ /* Look for supported chip ID */
+ anx78xx_poweron(anx78xx);
+
+ err = regmap_read(anx78xx->map[I2C_IDX_TX_P2], SP_DEVICE_IDL_REG,
+ &idl);
+ if (err)
+ goto err_poweroff;
+
+ err = regmap_read(anx78xx->map[I2C_IDX_TX_P2], SP_DEVICE_IDH_REG,
+ &idh);
+ if (err)
+ goto err_poweroff;
+
+ anx78xx->chipid = (u8)idl | ((u8)idh << 8);
+
+ err = regmap_read(anx78xx->map[I2C_IDX_TX_P2], SP_DEVICE_VERSION_REG,
+ &version);
+ if (err)
+ goto err_poweroff;
+
+ for (i = 0; i < ARRAY_SIZE(anx78xx_chipid_list); i++) {
+ if (anx78xx->chipid == anx78xx_chipid_list[i]) {
+ DRM_INFO("Found ANX%x (ver. %d) SlimPort Transmitter\n",
+ anx78xx->chipid, version);
+ found = true;
+ break;
+ }
+ }
+
+ if (!found) {
+ DRM_ERROR("ANX%x (ver. %d) not supported by this driver\n",
+ anx78xx->chipid, version);
+ err = -ENODEV;
+ goto err_poweroff;
+ }
+
+ err = devm_request_threaded_irq(&client->dev, pdata->hpd_irq, NULL,
+ anx78xx_hpd_threaded_handler,
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ "anx78xx-hpd", anx78xx);
+ if (err) {
+ DRM_ERROR("Failed to request CABLE_DET threaded IRQ: %d\n",
+ err);
+ goto err_poweroff;
+ }
+
+ err = devm_request_threaded_irq(&client->dev, pdata->intp_irq, NULL,
+ anx78xx_intp_threaded_handler,
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ "anx78xx-intp", anx78xx);
+ if (err) {
+ DRM_ERROR("Failed to request INTP threaded IRQ: %d\n", err);
+ goto err_poweroff;
+ }
+
+ anx78xx->bridge.funcs = &anx78xx_bridge_funcs;
+
+ drm_bridge_add(&anx78xx->bridge);
+
+ /* If cable is pulled out, just poweroff and wait for HPD event */
+ if (!gpiod_get_value(anx78xx->pdata.gpiod_hpd))
+ anx78xx_poweroff(anx78xx);
+
+ return 0;
+
+err_poweroff:
+ anx78xx_poweroff(anx78xx);
+
+err_unregister_i2c:
+ unregister_i2c_dummy_clients(anx78xx);
+ return err;
+}
+
+static void anx78xx_i2c_remove(struct i2c_client *client)
+{
+ struct anx78xx *anx78xx = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&anx78xx->bridge);
+
+ unregister_i2c_dummy_clients(anx78xx);
+
+ kfree(anx78xx->edid);
+}
+
+static const struct i2c_device_id anx78xx_id[] = {
+ { "anx7814", 0 },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, anx78xx_id);
+
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id anx78xx_match_table[] = {
+ { .compatible = "analogix,anx7808", .data = anx7808_i2c_addresses },
+ { .compatible = "analogix,anx7812", .data = anx781x_i2c_addresses },
+ { .compatible = "analogix,anx7814", .data = anx781x_i2c_addresses },
+ { .compatible = "analogix,anx7818", .data = anx781x_i2c_addresses },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, anx78xx_match_table);
+#endif
+
+static struct i2c_driver anx78xx_driver = {
+ .driver = {
+ .name = "anx7814",
+ .of_match_table = of_match_ptr(anx78xx_match_table),
+ },
+ .probe = anx78xx_i2c_probe,
+ .remove = anx78xx_i2c_remove,
+ .id_table = anx78xx_id,
+};
+module_i2c_driver(anx78xx_driver);
+
+MODULE_DESCRIPTION("ANX78xx SlimPort Transmitter driver");
+MODULE_AUTHOR("Enric Balletbo i Serra <enric.balletbo@collabora.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.h b/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.h
new file mode 100644
index 000000000..db2a2725a
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix-anx78xx.h
@@ -0,0 +1,249 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright(c) 2016, Analogix Semiconductor. All rights reserved.
+ */
+
+#ifndef __ANX78xx_H
+#define __ANX78xx_H
+
+#include "analogix-i2c-dptx.h"
+#include "analogix-i2c-txcommon.h"
+
+/***************************************************************/
+/* Register definitions for RX_PO */
+/***************************************************************/
+
+/*
+ * System Control and Status
+ */
+
+/* Software Reset Register 1 */
+#define SP_SOFTWARE_RESET1_REG 0x11
+#define SP_VIDEO_RST BIT(4)
+#define SP_HDCP_MAN_RST BIT(2)
+#define SP_TMDS_RST BIT(1)
+#define SP_SW_MAN_RST BIT(0)
+
+/* System Status Register */
+#define SP_SYSTEM_STATUS_REG 0x14
+#define SP_TMDS_CLOCK_DET BIT(1)
+#define SP_TMDS_DE_DET BIT(0)
+
+/* HDMI Status Register */
+#define SP_HDMI_STATUS_REG 0x15
+#define SP_HDMI_AUD_LAYOUT BIT(3)
+#define SP_HDMI_DET BIT(0)
+# define SP_DVI_MODE 0
+# define SP_HDMI_MODE 1
+
+/* HDMI Mute Control Register */
+#define SP_HDMI_MUTE_CTRL_REG 0x16
+#define SP_AUD_MUTE BIT(1)
+#define SP_VID_MUTE BIT(0)
+
+/* System Power Down Register 1 */
+#define SP_SYSTEM_POWER_DOWN1_REG 0x18
+#define SP_PWDN_CTRL BIT(0)
+
+/*
+ * Audio and Video Auto Control
+ */
+
+/* Auto Audio and Video Control register */
+#define SP_AUDVID_CTRL_REG 0x20
+#define SP_AVC_OE BIT(7)
+#define SP_AAC_OE BIT(6)
+#define SP_AVC_EN BIT(1)
+#define SP_AAC_EN BIT(0)
+
+/* Audio Exception Enable Registers */
+#define SP_AUD_EXCEPTION_ENABLE_BASE (0x24 - 1)
+/* Bits for Audio Exception Enable Register 3 */
+#define SP_AEC_EN21 BIT(5)
+
+/*
+ * Interrupt
+ */
+
+/* Interrupt Status Register 1 */
+#define SP_INT_STATUS1_REG 0x31
+/* Bits for Interrupt Status Register 1 */
+#define SP_HDMI_DVI BIT(7)
+#define SP_CKDT_CHG BIT(6)
+#define SP_SCDT_CHG BIT(5)
+#define SP_PCLK_CHG BIT(4)
+#define SP_PLL_UNLOCK BIT(3)
+#define SP_CABLE_PLUG_CHG BIT(2)
+#define SP_SET_MUTE BIT(1)
+#define SP_SW_INTR BIT(0)
+/* Bits for Interrupt Status Register 2 */
+#define SP_HDCP_ERR BIT(5)
+#define SP_AUDIO_SAMPLE_CHG BIT(0) /* undocumented */
+/* Bits for Interrupt Status Register 3 */
+#define SP_AUD_MODE_CHG BIT(0)
+/* Bits for Interrupt Status Register 5 */
+#define SP_AUDIO_RCV BIT(0)
+/* Bits for Interrupt Status Register 6 */
+#define SP_INT_STATUS6_REG 0x36
+#define SP_CTS_RCV BIT(7)
+#define SP_NEW_AUD_PKT BIT(4)
+#define SP_NEW_AVI_PKT BIT(1)
+#define SP_NEW_CP_PKT BIT(0)
+/* Bits for Interrupt Status Register 7 */
+#define SP_NO_VSI BIT(7)
+#define SP_NEW_VS BIT(4)
+
+/* Interrupt Mask 1 Status Registers */
+#define SP_INT_MASK1_REG 0x41
+
+/* HDMI US TIMER Control Register */
+#define SP_HDMI_US_TIMER_CTRL_REG 0x49
+#define SP_MS_TIMER_MARGIN_10_8_MASK 0x07
+
+/*
+ * TMDS Control
+ */
+
+/* TMDS Control Registers */
+#define SP_TMDS_CTRL_BASE (0x50 - 1)
+/* Bits for TMDS Control Register 7 */
+#define SP_PD_RT BIT(0)
+
+/*
+ * Video Control
+ */
+
+/* Video Status Register */
+#define SP_VIDEO_STATUS_REG 0x70
+#define SP_COLOR_DEPTH_MASK 0xf0
+#define SP_COLOR_DEPTH_SHIFT 4
+# define SP_COLOR_DEPTH_MODE_LEGACY 0x00
+# define SP_COLOR_DEPTH_MODE_24BIT 0x04
+# define SP_COLOR_DEPTH_MODE_30BIT 0x05
+# define SP_COLOR_DEPTH_MODE_36BIT 0x06
+# define SP_COLOR_DEPTH_MODE_48BIT 0x07
+
+/* Video Data Range Control Register */
+#define SP_VID_DATA_RANGE_CTRL_REG 0x83
+#define SP_R2Y_INPUT_LIMIT BIT(1)
+
+/* Pixel Clock High Resolution Counter Registers */
+#define SP_PCLK_HIGHRES_CNT_BASE (0x8c - 1)
+
+/*
+ * Audio Control
+ */
+
+/* Number of Audio Channels Status Registers */
+#define SP_AUD_CH_STATUS_REG_NUM 6
+
+/* Audio IN S/PDIF Channel Status Registers */
+#define SP_AUD_SPDIF_CH_STATUS_BASE 0xc7
+
+/* Audio IN S/PDIF Channel Status Register 4 */
+#define SP_FS_FREQ_MASK 0x0f
+# define SP_FS_FREQ_44100HZ 0x00
+# define SP_FS_FREQ_48000HZ 0x02
+# define SP_FS_FREQ_32000HZ 0x03
+# define SP_FS_FREQ_88200HZ 0x08
+# define SP_FS_FREQ_96000HZ 0x0a
+# define SP_FS_FREQ_176400HZ 0x0c
+# define SP_FS_FREQ_192000HZ 0x0e
+
+/*
+ * Micellaneous Control Block
+ */
+
+/* CHIP Control Register */
+#define SP_CHIP_CTRL_REG 0xe3
+#define SP_MAN_HDMI5V_DET BIT(3)
+#define SP_PLLLOCK_CKDT_EN BIT(2)
+#define SP_ANALOG_CKDT_EN BIT(1)
+#define SP_DIGITAL_CKDT_EN BIT(0)
+
+/* Packet Receiving Status Register */
+#define SP_PACKET_RECEIVING_STATUS_REG 0xf3
+#define SP_AVI_RCVD BIT(5)
+#define SP_VSI_RCVD BIT(1)
+
+/***************************************************************/
+/* Register definitions for RX_P1 */
+/***************************************************************/
+
+/* HDCP BCAPS Shadow Register */
+#define SP_HDCP_BCAPS_SHADOW_REG 0x2a
+#define SP_BCAPS_REPEATER BIT(5)
+
+/* HDCP Status Register */
+#define SP_RX_HDCP_STATUS_REG 0x3f
+#define SP_AUTH_EN BIT(4)
+
+/*
+ * InfoFrame and Control Packet Registers
+ */
+
+/* AVI InfoFrame packet checksum */
+#define SP_AVI_INFOFRAME_CHECKSUM 0xa3
+
+/* AVI InfoFrame Registers */
+#define SP_AVI_INFOFRAME_DATA_BASE 0xa4
+
+#define SP_AVI_COLOR_F_MASK 0x60
+#define SP_AVI_COLOR_F_SHIFT 5
+
+/* Audio InfoFrame Registers */
+#define SP_AUD_INFOFRAME_DATA_BASE 0xc4
+#define SP_AUD_INFOFRAME_LAYOUT_MASK 0x0f
+
+/* MPEG/HDMI Vendor Specific InfoFrame Packet type code */
+#define SP_MPEG_VS_INFOFRAME_TYPE_REG 0xe0
+
+/* MPEG/HDMI Vendor Specific InfoFrame Packet length */
+#define SP_MPEG_VS_INFOFRAME_LEN_REG 0xe2
+
+/* MPEG/HDMI Vendor Specific InfoFrame Packet version number */
+#define SP_MPEG_VS_INFOFRAME_VER_REG 0xe1
+
+/* MPEG/HDMI Vendor Specific InfoFrame Packet content */
+#define SP_MPEG_VS_INFOFRAME_DATA_BASE 0xe4
+
+/* General Control Packet Register */
+#define SP_GENERAL_CTRL_PACKET_REG 0x9f
+#define SP_CLEAR_AVMUTE BIT(4)
+#define SP_SET_AVMUTE BIT(0)
+
+/***************************************************************/
+/* Register definitions for TX_P1 */
+/***************************************************************/
+
+/* DP TX Link Training Control Register */
+#define SP_DP_TX_LT_CTRL0_REG 0x30
+
+/* PD 1.2 Lint Training 80bit Pattern Register */
+#define SP_DP_LT_80BIT_PATTERN0_REG 0x80
+#define SP_DP_LT_80BIT_PATTERN_REG_NUM 10
+
+/* Audio Interface Control Register 0 */
+#define SP_AUD_INTERFACE_CTRL0_REG 0x5f
+#define SP_AUD_INTERFACE_DISABLE 0x80
+
+/* Audio Interface Control Register 2 */
+#define SP_AUD_INTERFACE_CTRL2_REG 0x60
+#define SP_M_AUD_ADJUST_ST 0x04
+
+/* Audio Interface Control Register 3 */
+#define SP_AUD_INTERFACE_CTRL3_REG 0x62
+
+/* Audio Interface Control Register 4 */
+#define SP_AUD_INTERFACE_CTRL4_REG 0x67
+
+/* Audio Interface Control Register 5 */
+#define SP_AUD_INTERFACE_CTRL5_REG 0x68
+
+/* Audio Interface Control Register 6 */
+#define SP_AUD_INTERFACE_CTRL6_REG 0x69
+
+/* Firmware Version Register */
+#define SP_FW_VER_REG 0xb7
+
+#endif
diff --git a/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c b/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c
new file mode 100644
index 000000000..b1e482994
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c
@@ -0,0 +1,165 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright(c) 2016, Analogix Semiconductor.
+ *
+ * Based on anx7808 driver obtained from chromeos with copyright:
+ * Copyright(c) 2013, Google Inc.
+ */
+#include <linux/regmap.h>
+
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm.h>
+#include <drm/drm_print.h>
+
+#include "analogix-i2c-dptx.h"
+
+#define AUX_WAIT_TIMEOUT_MS 15
+#define AUX_CH_BUFFER_SIZE 16
+
+static int anx_i2c_dp_clear_bits(struct regmap *map, u8 reg, u8 mask)
+{
+ return regmap_update_bits(map, reg, mask, 0);
+}
+
+static bool anx_dp_aux_op_finished(struct regmap *map_dptx)
+{
+ unsigned int value;
+ int err;
+
+ err = regmap_read(map_dptx, SP_DP_AUX_CH_CTRL2_REG, &value);
+ if (err < 0)
+ return false;
+
+ return (value & SP_AUX_EN) == 0;
+}
+
+static int anx_dp_aux_wait(struct regmap *map_dptx)
+{
+ unsigned long timeout;
+ unsigned int status;
+ int err;
+
+ timeout = jiffies + msecs_to_jiffies(AUX_WAIT_TIMEOUT_MS) + 1;
+
+ while (!anx_dp_aux_op_finished(map_dptx)) {
+ if (time_after(jiffies, timeout)) {
+ if (!anx_dp_aux_op_finished(map_dptx)) {
+ DRM_ERROR("Timed out waiting AUX to finish\n");
+ return -ETIMEDOUT;
+ }
+
+ break;
+ }
+
+ usleep_range(1000, 2000);
+ }
+
+ /* Read the AUX channel access status */
+ err = regmap_read(map_dptx, SP_AUX_CH_STATUS_REG, &status);
+ if (err < 0) {
+ DRM_ERROR("Failed to read from AUX channel: %d\n", err);
+ return err;
+ }
+
+ if (status & SP_AUX_STATUS) {
+ DRM_ERROR("Failed to wait for AUX channel (status: %02x)\n",
+ status);
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static int anx_dp_aux_address(struct regmap *map_dptx, unsigned int addr)
+{
+ int err;
+
+ err = regmap_write(map_dptx, SP_AUX_ADDR_7_0_REG, addr & 0xff);
+ if (err)
+ return err;
+
+ err = regmap_write(map_dptx, SP_AUX_ADDR_15_8_REG,
+ (addr & 0xff00) >> 8);
+ if (err)
+ return err;
+
+ /*
+ * DP AUX CH Address Register #2, only update bits[3:0]
+ * [7:4] RESERVED
+ * [3:0] AUX_ADDR[19:16], Register control AUX CH address.
+ */
+ err = regmap_update_bits(map_dptx, SP_AUX_ADDR_19_16_REG,
+ SP_AUX_ADDR_19_16_MASK,
+ (addr & 0xf0000) >> 16);
+
+ if (err)
+ return err;
+
+ return 0;
+}
+
+ssize_t anx_dp_aux_transfer(struct regmap *map_dptx,
+ struct drm_dp_aux_msg *msg)
+{
+ u8 ctrl1 = msg->request;
+ u8 ctrl2 = SP_AUX_EN;
+ u8 *buffer = msg->buffer;
+ int err;
+
+ /* The DP AUX transmit and receive buffer has 16 bytes. */
+ if (WARN_ON(msg->size > AUX_CH_BUFFER_SIZE))
+ return -E2BIG;
+
+ /* Zero-sized messages specify address-only transactions. */
+ if (msg->size < 1)
+ ctrl2 |= SP_ADDR_ONLY;
+ else /* For non-zero-sized set the length field. */
+ ctrl1 |= (msg->size - 1) << SP_AUX_LENGTH_SHIFT;
+
+ if ((msg->size > 0) && ((msg->request & DP_AUX_I2C_READ) == 0)) {
+ /* When WRITE | MOT write values to data buffer */
+ err = regmap_bulk_write(map_dptx,
+ SP_DP_BUF_DATA0_REG, buffer,
+ msg->size);
+ if (err)
+ return err;
+ }
+
+ /* Write address and request */
+ err = anx_dp_aux_address(map_dptx, msg->address);
+ if (err)
+ return err;
+
+ err = regmap_write(map_dptx, SP_DP_AUX_CH_CTRL1_REG, ctrl1);
+ if (err)
+ return err;
+
+ /* Start transaction */
+ err = regmap_update_bits(map_dptx, SP_DP_AUX_CH_CTRL2_REG,
+ SP_ADDR_ONLY | SP_AUX_EN, ctrl2);
+ if (err)
+ return err;
+
+ err = anx_dp_aux_wait(map_dptx);
+ if (err)
+ return err;
+
+ msg->reply = DP_AUX_I2C_REPLY_ACK;
+
+ if ((msg->size > 0) && (msg->request & DP_AUX_I2C_READ)) {
+ /* Read values from data buffer */
+ err = regmap_bulk_read(map_dptx,
+ SP_DP_BUF_DATA0_REG, buffer,
+ msg->size);
+ if (err)
+ return err;
+ }
+
+ err = anx_i2c_dp_clear_bits(map_dptx, SP_DP_AUX_CH_CTRL2_REG,
+ SP_ADDR_ONLY);
+ if (err)
+ return err;
+
+ return msg->size;
+}
+EXPORT_SYMBOL_GPL(anx_dp_aux_transfer);
diff --git a/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.h b/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.h
new file mode 100644
index 000000000..663c4bea6
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.h
@@ -0,0 +1,256 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright(c) 2016, Analogix Semiconductor.
+ *
+ * Based on anx7808 driver obtained from chromeos with copyright:
+ * Copyright(c) 2013, Google Inc.
+ */
+#ifndef _ANALOGIX_I2C_DPTX_H_
+#define _ANALOGIX_I2C_DPTX_H_
+
+/***************************************************************/
+/* Register definitions for TX_P0 */
+/***************************************************************/
+
+/* HDCP Status Register */
+#define SP_TX_HDCP_STATUS_REG 0x00
+#define SP_AUTH_FAIL BIT(5)
+#define SP_AUTHEN_PASS BIT(1)
+
+/* HDCP Control Register 0 */
+#define SP_HDCP_CTRL0_REG 0x01
+#define SP_RX_REPEATER BIT(6)
+#define SP_RE_AUTH BIT(5)
+#define SP_SW_AUTH_OK BIT(4)
+#define SP_HARD_AUTH_EN BIT(3)
+#define SP_HDCP_ENC_EN BIT(2)
+#define SP_BKSV_SRM_PASS BIT(1)
+#define SP_KSVLIST_VLD BIT(0)
+/* HDCP Function Enabled */
+#define SP_HDCP_FUNCTION_ENABLED (BIT(0) | BIT(1) | BIT(2) | BIT(3))
+
+/* HDCP Receiver BSTATUS Register 0 */
+#define SP_HDCP_RX_BSTATUS0_REG 0x1b
+/* HDCP Receiver BSTATUS Register 1 */
+#define SP_HDCP_RX_BSTATUS1_REG 0x1c
+
+/* HDCP Embedded "Blue Screen" Content Registers */
+#define SP_HDCP_VID0_BLUE_SCREEN_REG 0x2c
+#define SP_HDCP_VID1_BLUE_SCREEN_REG 0x2d
+#define SP_HDCP_VID2_BLUE_SCREEN_REG 0x2e
+
+/* HDCP Wait R0 Timing Register */
+#define SP_HDCP_WAIT_R0_TIME_REG 0x40
+
+/* HDCP Link Integrity Check Timer Register */
+#define SP_HDCP_LINK_CHECK_TIMER_REG 0x41
+
+/* HDCP Repeater Ready Wait Timer Register */
+#define SP_HDCP_RPTR_RDY_WAIT_TIME_REG 0x42
+
+/* HDCP Auto Timer Register */
+#define SP_HDCP_AUTO_TIMER_REG 0x51
+
+/* HDCP Key Status Register */
+#define SP_HDCP_KEY_STATUS_REG 0x5e
+
+/* HDCP Key Command Register */
+#define SP_HDCP_KEY_COMMAND_REG 0x5f
+#define SP_DISABLE_SYNC_HDCP BIT(2)
+
+/* OTP Memory Key Protection Registers */
+#define SP_OTP_KEY_PROTECT1_REG 0x60
+#define SP_OTP_KEY_PROTECT2_REG 0x61
+#define SP_OTP_KEY_PROTECT3_REG 0x62
+#define SP_OTP_PSW1 0xa2
+#define SP_OTP_PSW2 0x7e
+#define SP_OTP_PSW3 0xc6
+
+/* DP System Control Registers */
+#define SP_DP_SYSTEM_CTRL_BASE (0x80 - 1)
+/* Bits for DP System Control Register 2 */
+#define SP_CHA_STA BIT(2)
+/* Bits for DP System Control Register 3 */
+#define SP_HPD_STATUS BIT(6)
+#define SP_HPD_FORCE BIT(5)
+#define SP_HPD_CTRL BIT(4)
+#define SP_STRM_VALID BIT(2)
+#define SP_STRM_FORCE BIT(1)
+#define SP_STRM_CTRL BIT(0)
+/* Bits for DP System Control Register 4 */
+#define SP_ENHANCED_MODE BIT(3)
+
+/* DP Video Control Register */
+#define SP_DP_VIDEO_CTRL_REG 0x84
+#define SP_COLOR_F_MASK 0x06
+#define SP_COLOR_F_SHIFT 1
+#define SP_BPC_MASK 0xe0
+#define SP_BPC_SHIFT 5
+# define SP_BPC_6BITS 0x00
+# define SP_BPC_8BITS 0x01
+# define SP_BPC_10BITS 0x02
+# define SP_BPC_12BITS 0x03
+
+/* DP Audio Control Register */
+#define SP_DP_AUDIO_CTRL_REG 0x87
+#define SP_AUD_EN BIT(0)
+
+/* 10us Pulse Generate Timer Registers */
+#define SP_I2C_GEN_10US_TIMER0_REG 0x88
+#define SP_I2C_GEN_10US_TIMER1_REG 0x89
+
+/* Packet Send Control Register */
+#define SP_PACKET_SEND_CTRL_REG 0x90
+#define SP_AUD_IF_UP BIT(7)
+#define SP_AVI_IF_UD BIT(6)
+#define SP_MPEG_IF_UD BIT(5)
+#define SP_SPD_IF_UD BIT(4)
+#define SP_AUD_IF_EN BIT(3)
+#define SP_AVI_IF_EN BIT(2)
+#define SP_MPEG_IF_EN BIT(1)
+#define SP_SPD_IF_EN BIT(0)
+
+/* DP HDCP Control Register */
+#define SP_DP_HDCP_CTRL_REG 0x92
+#define SP_AUTO_EN BIT(7)
+#define SP_AUTO_START BIT(5)
+#define SP_LINK_POLLING BIT(1)
+
+/* DP Main Link Bandwidth Setting Register */
+#define SP_DP_MAIN_LINK_BW_SET_REG 0xa0
+#define SP_LINK_BW_SET_MASK 0x1f
+#define SP_INITIAL_SLIM_M_AUD_SEL BIT(5)
+
+/* DP Lane Count Setting Register */
+#define SP_DP_LANE_COUNT_SET_REG 0xa1
+
+/* DP Training Pattern Set Register */
+#define SP_DP_TRAINING_PATTERN_SET_REG 0xa2
+
+/* DP Lane 0 Link Training Control Register */
+#define SP_DP_LANE0_LT_CTRL_REG 0xa3
+#define SP_TX_SW_SET_MASK 0x1b
+#define SP_MAX_PRE_REACH BIT(5)
+#define SP_MAX_DRIVE_REACH BIT(4)
+#define SP_PRE_EMP_LEVEL1 BIT(3)
+#define SP_DRVIE_CURRENT_LEVEL1 BIT(0)
+
+/* DP Link Training Control Register */
+#define SP_DP_LT_CTRL_REG 0xa8
+#define SP_DP_LT_INPROGRESS 0x80
+#define SP_LT_ERROR_TYPE_MASK 0x70
+# define SP_LT_NO_ERROR 0x00
+# define SP_LT_AUX_WRITE_ERROR 0x01
+# define SP_LT_MAX_DRIVE_REACHED 0x02
+# define SP_LT_WRONG_LANE_COUNT_SET 0x03
+# define SP_LT_LOOP_SAME_5_TIME 0x04
+# define SP_LT_CR_FAIL_IN_EQ 0x05
+# define SP_LT_EQ_LOOP_5_TIME 0x06
+#define SP_LT_EN BIT(0)
+
+/* DP CEP Training Control Registers */
+#define SP_DP_CEP_TRAINING_CTRL0_REG 0xa9
+#define SP_DP_CEP_TRAINING_CTRL1_REG 0xaa
+
+/* DP Debug Register 1 */
+#define SP_DP_DEBUG1_REG 0xb0
+#define SP_DEBUG_PLL_LOCK BIT(4)
+#define SP_POLLING_EN BIT(1)
+
+/* DP Polling Control Register */
+#define SP_DP_POLLING_CTRL_REG 0xb4
+#define SP_AUTO_POLLING_DISABLE BIT(0)
+
+/* DP Link Debug Control Register */
+#define SP_DP_LINK_DEBUG_CTRL_REG 0xb8
+#define SP_M_VID_DEBUG BIT(5)
+#define SP_NEW_PRBS7 BIT(4)
+#define SP_INSERT_ER BIT(1)
+#define SP_PRBS31_EN BIT(0)
+
+/* AUX Misc control Register */
+#define SP_AUX_MISC_CTRL_REG 0xbf
+
+/* DP PLL control Register */
+#define SP_DP_PLL_CTRL_REG 0xc7
+#define SP_PLL_RST BIT(6)
+
+/* DP Analog Power Down Register */
+#define SP_DP_ANALOG_POWER_DOWN_REG 0xc8
+#define SP_CH0_PD BIT(0)
+
+/* DP Misc Control Register */
+#define SP_DP_MISC_CTRL_REG 0xcd
+#define SP_EQ_TRAINING_LOOP BIT(6)
+
+/* DP Extra I2C Device Address Register */
+#define SP_DP_EXTRA_I2C_DEV_ADDR_REG 0xce
+#define SP_I2C_STRETCH_DISABLE BIT(7)
+
+#define SP_I2C_EXTRA_ADDR 0x50
+
+/* DP Downspread Control Register 1 */
+#define SP_DP_DOWNSPREAD_CTRL1_REG 0xd0
+
+/* DP M Value Calculation Control Register */
+#define SP_DP_M_CALCULATION_CTRL_REG 0xd9
+#define SP_M_GEN_CLK_SEL BIT(0)
+
+/* AUX Channel Access Status Register */
+#define SP_AUX_CH_STATUS_REG 0xe0
+#define SP_AUX_STATUS 0x0f
+
+/* AUX Channel DEFER Control Register */
+#define SP_AUX_DEFER_CTRL_REG 0xe2
+#define SP_DEFER_CTRL_EN BIT(7)
+
+/* DP Buffer Data Count Register */
+#define SP_BUF_DATA_COUNT_REG 0xe4
+#define SP_BUF_DATA_COUNT_MASK 0x1f
+#define SP_BUF_CLR BIT(7)
+
+/* DP AUX Channel Control Register 1 */
+#define SP_DP_AUX_CH_CTRL1_REG 0xe5
+#define SP_AUX_TX_COMM_MASK 0x0f
+#define SP_AUX_LENGTH_MASK 0xf0
+#define SP_AUX_LENGTH_SHIFT 4
+
+/* DP AUX CH Address Register 0 */
+#define SP_AUX_ADDR_7_0_REG 0xe6
+
+/* DP AUX CH Address Register 1 */
+#define SP_AUX_ADDR_15_8_REG 0xe7
+
+/* DP AUX CH Address Register 2 */
+#define SP_AUX_ADDR_19_16_REG 0xe8
+#define SP_AUX_ADDR_19_16_MASK 0x0f
+
+/* DP AUX Channel Control Register 2 */
+#define SP_DP_AUX_CH_CTRL2_REG 0xe9
+#define SP_AUX_SEL_RXCM BIT(6)
+#define SP_AUX_CHSEL BIT(3)
+#define SP_AUX_PN_INV BIT(2)
+#define SP_ADDR_ONLY BIT(1)
+#define SP_AUX_EN BIT(0)
+
+/* DP Video Stream Control InfoFrame Register */
+#define SP_DP_3D_VSC_CTRL_REG 0xea
+#define SP_INFO_FRAME_VSC_EN BIT(0)
+
+/* DP Video Stream Data Byte 1 Register */
+#define SP_DP_VSC_DB1_REG 0xeb
+
+/* DP AUX Channel Control Register 3 */
+#define SP_DP_AUX_CH_CTRL3_REG 0xec
+#define SP_WAIT_COUNTER_7_0_MASK 0xff
+
+/* DP AUX Channel Control Register 4 */
+#define SP_DP_AUX_CH_CTRL4_REG 0xed
+
+/* DP AUX Buffer Data Registers */
+#define SP_DP_BUF_DATA0_REG 0xf0
+
+ssize_t anx_dp_aux_transfer(struct regmap *map_dptx,
+ struct drm_dp_aux_msg *msg);
+
+#endif
diff --git a/drivers/gpu/drm/bridge/analogix/analogix-i2c-txcommon.h b/drivers/gpu/drm/bridge/analogix/analogix-i2c-txcommon.h
new file mode 100644
index 000000000..3c843497d
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix-i2c-txcommon.h
@@ -0,0 +1,234 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright(c) 2016, Analogix Semiconductor. All rights reserved.
+ */
+#ifndef _ANALOGIX_I2C_TXCOMMON_H_
+#define _ANALOGIX_I2C_TXCOMMON_H_
+
+/***************************************************************/
+/* Register definitions for TX_P2 */
+/***************************************************************/
+
+/*
+ * Core Register Definitions
+ */
+
+/* Device ID Low Byte Register */
+#define SP_DEVICE_IDL_REG 0x02
+
+/* Device ID High Byte Register */
+#define SP_DEVICE_IDH_REG 0x03
+
+/* Device version register */
+#define SP_DEVICE_VERSION_REG 0x04
+
+/* Power Down Control Register */
+#define SP_POWERDOWN_CTRL_REG 0x05
+#define SP_REGISTER_PD BIT(7)
+#define SP_HDCP_PD BIT(5)
+#define SP_AUDIO_PD BIT(4)
+#define SP_VIDEO_PD BIT(3)
+#define SP_LINK_PD BIT(2)
+#define SP_TOTAL_PD BIT(1)
+
+/* Reset Control Register 1 */
+#define SP_RESET_CTRL1_REG 0x06
+#define SP_MISC_RST BIT(7)
+#define SP_VIDCAP_RST BIT(6)
+#define SP_VIDFIF_RST BIT(5)
+#define SP_AUDFIF_RST BIT(4)
+#define SP_AUDCAP_RST BIT(3)
+#define SP_HDCP_RST BIT(2)
+#define SP_SW_RST BIT(1)
+#define SP_HW_RST BIT(0)
+
+/* Reset Control Register 2 */
+#define SP_RESET_CTRL2_REG 0x07
+#define SP_AUX_RST BIT(2)
+#define SP_SERDES_FIFO_RST BIT(1)
+#define SP_I2C_REG_RST BIT(0)
+
+/* Video Control Register 1 */
+#define SP_VID_CTRL1_REG 0x08
+#define SP_VIDEO_EN BIT(7)
+#define SP_VIDEO_MUTE BIT(2)
+#define SP_DE_GEN BIT(1)
+#define SP_DEMUX BIT(0)
+
+/* Video Control Register 2 */
+#define SP_VID_CTRL2_REG 0x09
+#define SP_IN_COLOR_F_MASK 0x03
+#define SP_IN_YC_BIT_SEL BIT(2)
+#define SP_IN_BPC_MASK 0x70
+#define SP_IN_BPC_SHIFT 4
+# define SP_IN_BPC_12BIT 0x03
+# define SP_IN_BPC_10BIT 0x02
+# define SP_IN_BPC_8BIT 0x01
+# define SP_IN_BPC_6BIT 0x00
+#define SP_IN_D_RANGE BIT(7)
+
+/* Video Control Register 3 */
+#define SP_VID_CTRL3_REG 0x0a
+#define SP_HPD_OUT BIT(6)
+
+/* Video Control Register 5 */
+#define SP_VID_CTRL5_REG 0x0c
+#define SP_CSC_STD_SEL BIT(7)
+#define SP_XVYCC_RNG_LMT BIT(6)
+#define SP_RANGE_Y2R BIT(5)
+#define SP_CSPACE_Y2R BIT(4)
+#define SP_RGB_RNG_LMT BIT(3)
+#define SP_Y_RNG_LMT BIT(2)
+#define SP_RANGE_R2Y BIT(1)
+#define SP_CSPACE_R2Y BIT(0)
+
+/* Video Control Register 6 */
+#define SP_VID_CTRL6_REG 0x0d
+#define SP_TEST_PATTERN_EN BIT(7)
+#define SP_VIDEO_PROCESS_EN BIT(6)
+#define SP_VID_US_MODE BIT(3)
+#define SP_VID_DS_MODE BIT(2)
+#define SP_UP_SAMPLE BIT(1)
+#define SP_DOWN_SAMPLE BIT(0)
+
+/* Video Control Register 8 */
+#define SP_VID_CTRL8_REG 0x0f
+#define SP_VID_VRES_TH BIT(0)
+
+/* Total Line Status Low Byte Register */
+#define SP_TOTAL_LINE_STAL_REG 0x24
+
+/* Total Line Status High Byte Register */
+#define SP_TOTAL_LINE_STAH_REG 0x25
+
+/* Active Line Status Low Byte Register */
+#define SP_ACT_LINE_STAL_REG 0x26
+
+/* Active Line Status High Byte Register */
+#define SP_ACT_LINE_STAH_REG 0x27
+
+/* Vertical Front Porch Status Register */
+#define SP_V_F_PORCH_STA_REG 0x28
+
+/* Vertical SYNC Width Status Register */
+#define SP_V_SYNC_STA_REG 0x29
+
+/* Vertical Back Porch Status Register */
+#define SP_V_B_PORCH_STA_REG 0x2a
+
+/* Total Pixel Status Low Byte Register */
+#define SP_TOTAL_PIXEL_STAL_REG 0x2b
+
+/* Total Pixel Status High Byte Register */
+#define SP_TOTAL_PIXEL_STAH_REG 0x2c
+
+/* Active Pixel Status Low Byte Register */
+#define SP_ACT_PIXEL_STAL_REG 0x2d
+
+/* Active Pixel Status High Byte Register */
+#define SP_ACT_PIXEL_STAH_REG 0x2e
+
+/* Horizontal Front Porch Status Low Byte Register */
+#define SP_H_F_PORCH_STAL_REG 0x2f
+
+/* Horizontal Front Porch Statys High Byte Register */
+#define SP_H_F_PORCH_STAH_REG 0x30
+
+/* Horizontal SYNC Width Status Low Byte Register */
+#define SP_H_SYNC_STAL_REG 0x31
+
+/* Horizontal SYNC Width Status High Byte Register */
+#define SP_H_SYNC_STAH_REG 0x32
+
+/* Horizontal Back Porch Status Low Byte Register */
+#define SP_H_B_PORCH_STAL_REG 0x33
+
+/* Horizontal Back Porch Status High Byte Register */
+#define SP_H_B_PORCH_STAH_REG 0x34
+
+/* InfoFrame AVI Packet DB1 Register */
+#define SP_INFOFRAME_AVI_DB1_REG 0x70
+
+/* Bit Control Specific Register */
+#define SP_BIT_CTRL_SPECIFIC_REG 0x80
+#define SP_BIT_CTRL_SELECT_SHIFT 1
+#define SP_ENABLE_BIT_CTRL BIT(0)
+
+/* InfoFrame Audio Packet DB1 Register */
+#define SP_INFOFRAME_AUD_DB1_REG 0x83
+
+/* InfoFrame MPEG Packet DB1 Register */
+#define SP_INFOFRAME_MPEG_DB1_REG 0xb0
+
+/* Audio Channel Status Registers */
+#define SP_AUD_CH_STATUS_BASE 0xd0
+
+/* Audio Channel Num Register 5 */
+#define SP_I2S_CHANNEL_NUM_MASK 0xe0
+# define SP_I2S_CH_NUM_1 (0x00 << 5)
+# define SP_I2S_CH_NUM_2 (0x01 << 5)
+# define SP_I2S_CH_NUM_3 (0x02 << 5)
+# define SP_I2S_CH_NUM_4 (0x03 << 5)
+# define SP_I2S_CH_NUM_5 (0x04 << 5)
+# define SP_I2S_CH_NUM_6 (0x05 << 5)
+# define SP_I2S_CH_NUM_7 (0x06 << 5)
+# define SP_I2S_CH_NUM_8 (0x07 << 5)
+#define SP_EXT_VUCP BIT(2)
+#define SP_VBIT BIT(1)
+#define SP_AUDIO_LAYOUT BIT(0)
+
+/* Analog Debug Register 1 */
+#define SP_ANALOG_DEBUG1_REG 0xdc
+
+/* Analog Debug Register 2 */
+#define SP_ANALOG_DEBUG2_REG 0xdd
+#define SP_FORCE_SW_OFF_BYPASS 0x20
+#define SP_XTAL_FRQ 0x1c
+# define SP_XTAL_FRQ_19M2 (0x00 << 2)
+# define SP_XTAL_FRQ_24M (0x01 << 2)
+# define SP_XTAL_FRQ_25M (0x02 << 2)
+# define SP_XTAL_FRQ_26M (0x03 << 2)
+# define SP_XTAL_FRQ_27M (0x04 << 2)
+# define SP_XTAL_FRQ_38M4 (0x05 << 2)
+# define SP_XTAL_FRQ_52M (0x06 << 2)
+#define SP_POWERON_TIME_1P5MS 0x03
+
+/* Analog Control 0 Register */
+#define SP_ANALOG_CTRL0_REG 0xe1
+
+/* Common Interrupt Status Register 1 */
+#define SP_COMMON_INT_STATUS_BASE (0xf1 - 1)
+#define SP_PLL_LOCK_CHG 0x40
+
+/* Common Interrupt Status Register 2 */
+#define SP_COMMON_INT_STATUS2 0xf2
+#define SP_HDCP_AUTH_CHG BIT(1)
+#define SP_HDCP_AUTH_DONE BIT(0)
+
+#define SP_HDCP_LINK_CHECK_FAIL BIT(0)
+
+/* Common Interrupt Status Register 4 */
+#define SP_COMMON_INT_STATUS4_REG 0xf4
+#define SP_HPD_IRQ BIT(6)
+#define SP_HPD_ESYNC_ERR BIT(4)
+#define SP_HPD_CHG BIT(2)
+#define SP_HPD_LOST BIT(1)
+#define SP_HPD_PLUG BIT(0)
+
+/* DP Interrupt Status Register */
+#define SP_DP_INT_STATUS1_REG 0xf7
+#define SP_TRAINING_FINISH BIT(5)
+#define SP_POLLING_ERR BIT(4)
+
+/* Common Interrupt Mask Register */
+#define SP_COMMON_INT_MASK_BASE (0xf8 - 1)
+
+#define SP_COMMON_INT_MASK4_REG 0xfb
+
+/* DP Interrupts Mask Register */
+#define SP_DP_INT_MASK1_REG 0xfe
+
+/* Interrupt Control Register */
+#define SP_INT_CTRL_REG 0xff
+
+#endif /* _ANALOGIX_I2C_TXCOMMON_H_ */
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
new file mode 100644
index 000000000..df9370e0f
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -0,0 +1,1910 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+* Analogix DP (Display Port) core interface driver.
+*
+* Copyright (C) 2012 Samsung Electronics Co., Ltd.
+* Author: Jingoo Han <jg1.han@samsung.com>
+*/
+
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+
+#include <drm/bridge/analogix_dp.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_device.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include "analogix_dp_core.h"
+#include "analogix_dp_reg.h"
+
+#define to_dp(nm) container_of(nm, struct analogix_dp_device, nm)
+
+static const bool verify_fast_training;
+
+struct bridge_init {
+ struct i2c_client *client;
+ struct device_node *node;
+};
+
+static int analogix_dp_init_dp(struct analogix_dp_device *dp)
+{
+ int ret;
+
+ analogix_dp_reset(dp);
+
+ analogix_dp_swreset(dp);
+
+ analogix_dp_init_analog_param(dp);
+ analogix_dp_init_interrupt(dp);
+
+ /* SW defined function Normal operation */
+ analogix_dp_enable_sw_function(dp);
+
+ analogix_dp_config_interrupt(dp);
+ ret = analogix_dp_init_analog_func(dp);
+ if (ret)
+ return ret;
+
+ analogix_dp_init_hpd(dp);
+ analogix_dp_init_aux(dp);
+ return 0;
+}
+
+static int analogix_dp_detect_hpd(struct analogix_dp_device *dp)
+{
+ int timeout_loop = 0;
+
+ while (timeout_loop < DP_TIMEOUT_LOOP_COUNT) {
+ if (analogix_dp_get_plug_in_status(dp) == 0)
+ return 0;
+
+ timeout_loop++;
+ usleep_range(1000, 1100);
+ }
+
+ /*
+ * Some edp screen do not have hpd signal, so we can't just
+ * return failed when hpd plug in detect failed, DT property
+ * "force-hpd" would indicate whether driver need this.
+ */
+ if (!dp->force_hpd)
+ return -ETIMEDOUT;
+
+ /*
+ * The eDP TRM indicate that if HPD_STATUS(RO) is 0, AUX CH
+ * will not work, so we need to give a force hpd action to
+ * set HPD_STATUS manually.
+ */
+ dev_dbg(dp->dev, "failed to get hpd plug status, try to force hpd\n");
+
+ analogix_dp_force_hpd(dp);
+
+ if (analogix_dp_get_plug_in_status(dp) != 0) {
+ dev_err(dp->dev, "failed to get hpd plug in status\n");
+ return -EINVAL;
+ }
+
+ dev_dbg(dp->dev, "success to get plug in status after force hpd\n");
+
+ return 0;
+}
+
+static bool analogix_dp_detect_sink_psr(struct analogix_dp_device *dp)
+{
+ unsigned char psr_version;
+ int ret;
+
+ ret = drm_dp_dpcd_readb(&dp->aux, DP_PSR_SUPPORT, &psr_version);
+ if (ret != 1) {
+ dev_err(dp->dev, "failed to get PSR version, disable it\n");
+ return false;
+ }
+
+ dev_dbg(dp->dev, "Panel PSR version : %x\n", psr_version);
+ return psr_version & DP_PSR_IS_SUPPORTED;
+}
+
+static int analogix_dp_enable_sink_psr(struct analogix_dp_device *dp)
+{
+ unsigned char psr_en;
+ int ret;
+
+ /* Disable psr function */
+ ret = drm_dp_dpcd_readb(&dp->aux, DP_PSR_EN_CFG, &psr_en);
+ if (ret != 1) {
+ dev_err(dp->dev, "failed to get psr config\n");
+ goto end;
+ }
+
+ psr_en &= ~DP_PSR_ENABLE;
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en);
+ if (ret != 1) {
+ dev_err(dp->dev, "failed to disable panel psr\n");
+ goto end;
+ }
+
+ /* Main-Link transmitter remains active during PSR active states */
+ psr_en = DP_PSR_CRC_VERIFICATION;
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en);
+ if (ret != 1) {
+ dev_err(dp->dev, "failed to set panel psr\n");
+ goto end;
+ }
+
+ /* Enable psr function */
+ psr_en = DP_PSR_ENABLE | DP_PSR_CRC_VERIFICATION;
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en);
+ if (ret != 1) {
+ dev_err(dp->dev, "failed to set panel psr\n");
+ goto end;
+ }
+
+ analogix_dp_enable_psr_crc(dp);
+
+ dp->psr_supported = true;
+
+ return 0;
+end:
+ dev_err(dp->dev, "enable psr fail, force to disable psr\n");
+
+ return ret;
+}
+
+static int
+analogix_dp_enable_rx_to_enhanced_mode(struct analogix_dp_device *dp,
+ bool enable)
+{
+ u8 data;
+ int ret;
+
+ ret = drm_dp_dpcd_readb(&dp->aux, DP_LANE_COUNT_SET, &data);
+ if (ret != 1)
+ return ret;
+
+ if (enable)
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_LANE_COUNT_SET,
+ DP_LANE_COUNT_ENHANCED_FRAME_EN |
+ DPCD_LANE_COUNT_SET(data));
+ else
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_LANE_COUNT_SET,
+ DPCD_LANE_COUNT_SET(data));
+
+ return ret < 0 ? ret : 0;
+}
+
+static int analogix_dp_is_enhanced_mode_available(struct analogix_dp_device *dp,
+ u8 *enhanced_mode_support)
+{
+ u8 data;
+ int ret;
+
+ ret = drm_dp_dpcd_readb(&dp->aux, DP_MAX_LANE_COUNT, &data);
+ if (ret != 1) {
+ *enhanced_mode_support = 0;
+ return ret;
+ }
+
+ *enhanced_mode_support = DPCD_ENHANCED_FRAME_CAP(data);
+
+ return 0;
+}
+
+static int analogix_dp_set_enhanced_mode(struct analogix_dp_device *dp)
+{
+ u8 data;
+ int ret;
+
+ ret = analogix_dp_is_enhanced_mode_available(dp, &data);
+ if (ret < 0)
+ return ret;
+
+ ret = analogix_dp_enable_rx_to_enhanced_mode(dp, data);
+ if (ret < 0)
+ return ret;
+
+ analogix_dp_enable_enhanced_mode(dp, data);
+
+ return 0;
+}
+
+static int analogix_dp_training_pattern_dis(struct analogix_dp_device *dp)
+{
+ int ret;
+
+ analogix_dp_set_training_pattern(dp, DP_NONE);
+
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET,
+ DP_TRAINING_PATTERN_DISABLE);
+
+ return ret < 0 ? ret : 0;
+}
+
+static void
+analogix_dp_set_lane_lane_pre_emphasis(struct analogix_dp_device *dp,
+ int pre_emphasis, int lane)
+{
+ switch (lane) {
+ case 0:
+ analogix_dp_set_lane0_pre_emphasis(dp, pre_emphasis);
+ break;
+ case 1:
+ analogix_dp_set_lane1_pre_emphasis(dp, pre_emphasis);
+ break;
+
+ case 2:
+ analogix_dp_set_lane2_pre_emphasis(dp, pre_emphasis);
+ break;
+
+ case 3:
+ analogix_dp_set_lane3_pre_emphasis(dp, pre_emphasis);
+ break;
+ }
+}
+
+static int analogix_dp_link_start(struct analogix_dp_device *dp)
+{
+ u8 buf[4];
+ int lane, lane_count, pll_tries, retval;
+
+ lane_count = dp->link_train.lane_count;
+
+ dp->link_train.lt_state = CLOCK_RECOVERY;
+ dp->link_train.eq_loop = 0;
+
+ for (lane = 0; lane < lane_count; lane++)
+ dp->link_train.cr_loop[lane] = 0;
+
+ /* Set link rate and count as you want to establish*/
+ analogix_dp_set_link_bandwidth(dp, dp->link_train.link_rate);
+ analogix_dp_set_lane_count(dp, dp->link_train.lane_count);
+
+ /* Setup RX configuration */
+ buf[0] = dp->link_train.link_rate;
+ buf[1] = dp->link_train.lane_count;
+ retval = drm_dp_dpcd_write(&dp->aux, DP_LINK_BW_SET, buf, 2);
+ if (retval < 0)
+ return retval;
+ /* set enhanced mode if available */
+ retval = analogix_dp_set_enhanced_mode(dp);
+ if (retval < 0) {
+ dev_err(dp->dev, "failed to set enhance mode\n");
+ return retval;
+ }
+
+ /* Set TX pre-emphasis to minimum */
+ for (lane = 0; lane < lane_count; lane++)
+ analogix_dp_set_lane_lane_pre_emphasis(dp,
+ PRE_EMPHASIS_LEVEL_0, lane);
+
+ /* Wait for PLL lock */
+ pll_tries = 0;
+ while (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
+ if (pll_tries == DP_TIMEOUT_LOOP_COUNT) {
+ dev_err(dp->dev, "Wait for PLL lock timed out\n");
+ return -ETIMEDOUT;
+ }
+
+ pll_tries++;
+ usleep_range(90, 120);
+ }
+
+ /* Set training pattern 1 */
+ analogix_dp_set_training_pattern(dp, TRAINING_PTN1);
+
+ /* Set RX training pattern */
+ retval = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET,
+ DP_LINK_SCRAMBLING_DISABLE |
+ DP_TRAINING_PATTERN_1);
+ if (retval < 0)
+ return retval;
+
+ for (lane = 0; lane < lane_count; lane++)
+ buf[lane] = DP_TRAIN_PRE_EMPH_LEVEL_0 |
+ DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
+
+ retval = drm_dp_dpcd_write(&dp->aux, DP_TRAINING_LANE0_SET, buf,
+ lane_count);
+ if (retval < 0)
+ return retval;
+
+ return 0;
+}
+
+static unsigned char analogix_dp_get_lane_status(u8 link_status[2], int lane)
+{
+ int shift = (lane & 1) * 4;
+ u8 link_value = link_status[lane >> 1];
+
+ return (link_value >> shift) & 0xf;
+}
+
+static int analogix_dp_clock_recovery_ok(u8 link_status[2], int lane_count)
+{
+ int lane;
+ u8 lane_status;
+
+ for (lane = 0; lane < lane_count; lane++) {
+ lane_status = analogix_dp_get_lane_status(link_status, lane);
+ if ((lane_status & DP_LANE_CR_DONE) == 0)
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int analogix_dp_channel_eq_ok(u8 link_status[2], u8 link_align,
+ int lane_count)
+{
+ int lane;
+ u8 lane_status;
+
+ if ((link_align & DP_INTERLANE_ALIGN_DONE) == 0)
+ return -EINVAL;
+
+ for (lane = 0; lane < lane_count; lane++) {
+ lane_status = analogix_dp_get_lane_status(link_status, lane);
+ lane_status &= DP_CHANNEL_EQ_BITS;
+ if (lane_status != DP_CHANNEL_EQ_BITS)
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static unsigned char
+analogix_dp_get_adjust_request_voltage(u8 adjust_request[2], int lane)
+{
+ int shift = (lane & 1) * 4;
+ u8 link_value = adjust_request[lane >> 1];
+
+ return (link_value >> shift) & 0x3;
+}
+
+static unsigned char analogix_dp_get_adjust_request_pre_emphasis(
+ u8 adjust_request[2],
+ int lane)
+{
+ int shift = (lane & 1) * 4;
+ u8 link_value = adjust_request[lane >> 1];
+
+ return ((link_value >> shift) & 0xc) >> 2;
+}
+
+static void analogix_dp_set_lane_link_training(struct analogix_dp_device *dp,
+ u8 training_lane_set, int lane)
+{
+ switch (lane) {
+ case 0:
+ analogix_dp_set_lane0_link_training(dp, training_lane_set);
+ break;
+ case 1:
+ analogix_dp_set_lane1_link_training(dp, training_lane_set);
+ break;
+
+ case 2:
+ analogix_dp_set_lane2_link_training(dp, training_lane_set);
+ break;
+
+ case 3:
+ analogix_dp_set_lane3_link_training(dp, training_lane_set);
+ break;
+ }
+}
+
+static unsigned int
+analogix_dp_get_lane_link_training(struct analogix_dp_device *dp,
+ int lane)
+{
+ u32 reg;
+
+ switch (lane) {
+ case 0:
+ reg = analogix_dp_get_lane0_link_training(dp);
+ break;
+ case 1:
+ reg = analogix_dp_get_lane1_link_training(dp);
+ break;
+ case 2:
+ reg = analogix_dp_get_lane2_link_training(dp);
+ break;
+ case 3:
+ reg = analogix_dp_get_lane3_link_training(dp);
+ break;
+ default:
+ WARN_ON(1);
+ return 0;
+ }
+
+ return reg;
+}
+
+static void analogix_dp_reduce_link_rate(struct analogix_dp_device *dp)
+{
+ analogix_dp_training_pattern_dis(dp);
+ analogix_dp_set_enhanced_mode(dp);
+
+ dp->link_train.lt_state = FAILED;
+}
+
+static void analogix_dp_get_adjust_training_lane(struct analogix_dp_device *dp,
+ u8 adjust_request[2])
+{
+ int lane, lane_count;
+ u8 voltage_swing, pre_emphasis, training_lane;
+
+ lane_count = dp->link_train.lane_count;
+ for (lane = 0; lane < lane_count; lane++) {
+ voltage_swing = analogix_dp_get_adjust_request_voltage(
+ adjust_request, lane);
+ pre_emphasis = analogix_dp_get_adjust_request_pre_emphasis(
+ adjust_request, lane);
+ training_lane = DPCD_VOLTAGE_SWING_SET(voltage_swing) |
+ DPCD_PRE_EMPHASIS_SET(pre_emphasis);
+
+ if (voltage_swing == VOLTAGE_LEVEL_3)
+ training_lane |= DP_TRAIN_MAX_SWING_REACHED;
+ if (pre_emphasis == PRE_EMPHASIS_LEVEL_3)
+ training_lane |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
+
+ dp->link_train.training_lane[lane] = training_lane;
+ }
+}
+
+static int analogix_dp_process_clock_recovery(struct analogix_dp_device *dp)
+{
+ int lane, lane_count, retval;
+ u8 voltage_swing, pre_emphasis, training_lane;
+ u8 link_status[2], adjust_request[2];
+
+ usleep_range(100, 101);
+
+ lane_count = dp->link_train.lane_count;
+
+ retval = drm_dp_dpcd_read(&dp->aux, DP_LANE0_1_STATUS, link_status, 2);
+ if (retval < 0)
+ return retval;
+
+ retval = drm_dp_dpcd_read(&dp->aux, DP_ADJUST_REQUEST_LANE0_1,
+ adjust_request, 2);
+ if (retval < 0)
+ return retval;
+
+ if (analogix_dp_clock_recovery_ok(link_status, lane_count) == 0) {
+ /* set training pattern 2 for EQ */
+ analogix_dp_set_training_pattern(dp, TRAINING_PTN2);
+
+ retval = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET,
+ DP_LINK_SCRAMBLING_DISABLE |
+ DP_TRAINING_PATTERN_2);
+ if (retval < 0)
+ return retval;
+
+ dev_dbg(dp->dev, "Link Training Clock Recovery success\n");
+ dp->link_train.lt_state = EQUALIZER_TRAINING;
+ } else {
+ for (lane = 0; lane < lane_count; lane++) {
+ training_lane = analogix_dp_get_lane_link_training(
+ dp, lane);
+ voltage_swing = analogix_dp_get_adjust_request_voltage(
+ adjust_request, lane);
+ pre_emphasis = analogix_dp_get_adjust_request_pre_emphasis(
+ adjust_request, lane);
+
+ if (DPCD_VOLTAGE_SWING_GET(training_lane) ==
+ voltage_swing &&
+ DPCD_PRE_EMPHASIS_GET(training_lane) ==
+ pre_emphasis)
+ dp->link_train.cr_loop[lane]++;
+
+ if (dp->link_train.cr_loop[lane] == MAX_CR_LOOP ||
+ voltage_swing == VOLTAGE_LEVEL_3 ||
+ pre_emphasis == PRE_EMPHASIS_LEVEL_3) {
+ dev_err(dp->dev, "CR Max reached (%d,%d,%d)\n",
+ dp->link_train.cr_loop[lane],
+ voltage_swing, pre_emphasis);
+ analogix_dp_reduce_link_rate(dp);
+ return -EIO;
+ }
+ }
+ }
+
+ analogix_dp_get_adjust_training_lane(dp, adjust_request);
+
+ for (lane = 0; lane < lane_count; lane++)
+ analogix_dp_set_lane_link_training(dp,
+ dp->link_train.training_lane[lane], lane);
+
+ retval = drm_dp_dpcd_write(&dp->aux, DP_TRAINING_LANE0_SET,
+ dp->link_train.training_lane, lane_count);
+ if (retval < 0)
+ return retval;
+
+ return 0;
+}
+
+static int analogix_dp_process_equalizer_training(struct analogix_dp_device *dp)
+{
+ int lane, lane_count, retval;
+ u32 reg;
+ u8 link_align, link_status[2], adjust_request[2];
+
+ usleep_range(400, 401);
+
+ lane_count = dp->link_train.lane_count;
+
+ retval = drm_dp_dpcd_read(&dp->aux, DP_LANE0_1_STATUS, link_status, 2);
+ if (retval < 0)
+ return retval;
+
+ if (analogix_dp_clock_recovery_ok(link_status, lane_count)) {
+ analogix_dp_reduce_link_rate(dp);
+ return -EIO;
+ }
+
+ retval = drm_dp_dpcd_read(&dp->aux, DP_ADJUST_REQUEST_LANE0_1,
+ adjust_request, 2);
+ if (retval < 0)
+ return retval;
+
+ retval = drm_dp_dpcd_readb(&dp->aux, DP_LANE_ALIGN_STATUS_UPDATED,
+ &link_align);
+ if (retval < 0)
+ return retval;
+
+ analogix_dp_get_adjust_training_lane(dp, adjust_request);
+
+ if (!analogix_dp_channel_eq_ok(link_status, link_align, lane_count)) {
+ /* traing pattern Set to Normal */
+ retval = analogix_dp_training_pattern_dis(dp);
+ if (retval < 0)
+ return retval;
+
+ dev_dbg(dp->dev, "Link Training success!\n");
+ analogix_dp_get_link_bandwidth(dp, &reg);
+ dp->link_train.link_rate = reg;
+ dev_dbg(dp->dev, "final bandwidth = %.2x\n",
+ dp->link_train.link_rate);
+
+ analogix_dp_get_lane_count(dp, &reg);
+ dp->link_train.lane_count = reg;
+ dev_dbg(dp->dev, "final lane count = %.2x\n",
+ dp->link_train.lane_count);
+
+ dp->link_train.lt_state = FINISHED;
+
+ return 0;
+ }
+
+ /* not all locked */
+ dp->link_train.eq_loop++;
+
+ if (dp->link_train.eq_loop > MAX_EQ_LOOP) {
+ dev_err(dp->dev, "EQ Max loop\n");
+ analogix_dp_reduce_link_rate(dp);
+ return -EIO;
+ }
+
+ for (lane = 0; lane < lane_count; lane++)
+ analogix_dp_set_lane_link_training(dp,
+ dp->link_train.training_lane[lane], lane);
+
+ retval = drm_dp_dpcd_write(&dp->aux, DP_TRAINING_LANE0_SET,
+ dp->link_train.training_lane, lane_count);
+ if (retval < 0)
+ return retval;
+
+ return 0;
+}
+
+static void analogix_dp_get_max_rx_bandwidth(struct analogix_dp_device *dp,
+ u8 *bandwidth)
+{
+ u8 data;
+
+ /*
+ * For DP rev.1.1, Maximum link rate of Main Link lanes
+ * 0x06 = 1.62 Gbps, 0x0a = 2.7 Gbps
+ * For DP rev.1.2, Maximum link rate of Main Link lanes
+ * 0x06 = 1.62 Gbps, 0x0a = 2.7 Gbps, 0x14 = 5.4Gbps
+ */
+ drm_dp_dpcd_readb(&dp->aux, DP_MAX_LINK_RATE, &data);
+ *bandwidth = data;
+}
+
+static void analogix_dp_get_max_rx_lane_count(struct analogix_dp_device *dp,
+ u8 *lane_count)
+{
+ u8 data;
+
+ /*
+ * For DP rev.1.1, Maximum number of Main Link lanes
+ * 0x01 = 1 lane, 0x02 = 2 lanes, 0x04 = 4 lanes
+ */
+ drm_dp_dpcd_readb(&dp->aux, DP_MAX_LANE_COUNT, &data);
+ *lane_count = DPCD_MAX_LANE_COUNT(data);
+}
+
+static int analogix_dp_full_link_train(struct analogix_dp_device *dp,
+ u32 max_lanes, u32 max_rate)
+{
+ int retval = 0;
+ bool training_finished = false;
+
+ /*
+ * MACRO_RST must be applied after the PLL_LOCK to avoid
+ * the DP inter pair skew issue for at least 10 us
+ */
+ analogix_dp_reset_macro(dp);
+
+ /* Initialize by reading RX's DPCD */
+ analogix_dp_get_max_rx_bandwidth(dp, &dp->link_train.link_rate);
+ analogix_dp_get_max_rx_lane_count(dp, &dp->link_train.lane_count);
+
+ if ((dp->link_train.link_rate != DP_LINK_BW_1_62) &&
+ (dp->link_train.link_rate != DP_LINK_BW_2_7) &&
+ (dp->link_train.link_rate != DP_LINK_BW_5_4)) {
+ dev_err(dp->dev, "Rx Max Link Rate is abnormal :%x !\n",
+ dp->link_train.link_rate);
+ dp->link_train.link_rate = DP_LINK_BW_1_62;
+ }
+
+ if (dp->link_train.lane_count == 0) {
+ dev_err(dp->dev, "Rx Max Lane count is abnormal :%x !\n",
+ dp->link_train.lane_count);
+ dp->link_train.lane_count = (u8)LANE_COUNT1;
+ }
+
+ /* Setup TX lane count & rate */
+ if (dp->link_train.lane_count > max_lanes)
+ dp->link_train.lane_count = max_lanes;
+ if (dp->link_train.link_rate > max_rate)
+ dp->link_train.link_rate = max_rate;
+
+ /* All DP analog module power up */
+ analogix_dp_set_analog_power_down(dp, POWER_ALL, 0);
+
+ dp->link_train.lt_state = START;
+
+ /* Process here */
+ while (!retval && !training_finished) {
+ switch (dp->link_train.lt_state) {
+ case START:
+ retval = analogix_dp_link_start(dp);
+ if (retval)
+ dev_err(dp->dev, "LT link start failed!\n");
+ break;
+ case CLOCK_RECOVERY:
+ retval = analogix_dp_process_clock_recovery(dp);
+ if (retval)
+ dev_err(dp->dev, "LT CR failed!\n");
+ break;
+ case EQUALIZER_TRAINING:
+ retval = analogix_dp_process_equalizer_training(dp);
+ if (retval)
+ dev_err(dp->dev, "LT EQ failed!\n");
+ break;
+ case FINISHED:
+ training_finished = 1;
+ break;
+ case FAILED:
+ return -EREMOTEIO;
+ }
+ }
+ if (retval)
+ dev_err(dp->dev, "eDP link training failed (%d)\n", retval);
+
+ return retval;
+}
+
+static int analogix_dp_fast_link_train(struct analogix_dp_device *dp)
+{
+ int i, ret;
+ u8 link_align, link_status[2];
+ enum pll_status status;
+
+ analogix_dp_reset_macro(dp);
+
+ analogix_dp_set_link_bandwidth(dp, dp->link_train.link_rate);
+ analogix_dp_set_lane_count(dp, dp->link_train.lane_count);
+
+ for (i = 0; i < dp->link_train.lane_count; i++) {
+ analogix_dp_set_lane_link_training(dp,
+ dp->link_train.training_lane[i], i);
+ }
+
+ ret = readx_poll_timeout(analogix_dp_get_pll_lock_status, dp, status,
+ status != PLL_UNLOCKED, 120,
+ 120 * DP_TIMEOUT_LOOP_COUNT);
+ if (ret) {
+ DRM_DEV_ERROR(dp->dev, "Wait for pll lock failed %d\n", ret);
+ return ret;
+ }
+
+ /* source Set training pattern 1 */
+ analogix_dp_set_training_pattern(dp, TRAINING_PTN1);
+ /* From DP spec, pattern must be on-screen for a minimum 500us */
+ usleep_range(500, 600);
+
+ analogix_dp_set_training_pattern(dp, TRAINING_PTN2);
+ /* From DP spec, pattern must be on-screen for a minimum 500us */
+ usleep_range(500, 600);
+
+ /* TODO: enhanced_mode?*/
+ analogix_dp_set_training_pattern(dp, DP_NONE);
+
+ /*
+ * Useful for debugging issues with fast link training, disable for more
+ * speed
+ */
+ if (verify_fast_training) {
+ ret = drm_dp_dpcd_readb(&dp->aux, DP_LANE_ALIGN_STATUS_UPDATED,
+ &link_align);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dp->dev, "Read align status failed %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = drm_dp_dpcd_read(&dp->aux, DP_LANE0_1_STATUS, link_status,
+ 2);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dp->dev, "Read link status failed %d\n",
+ ret);
+ return ret;
+ }
+
+ if (analogix_dp_clock_recovery_ok(link_status,
+ dp->link_train.lane_count)) {
+ DRM_DEV_ERROR(dp->dev, "Clock recovery failed\n");
+ analogix_dp_reduce_link_rate(dp);
+ return -EIO;
+ }
+
+ if (analogix_dp_channel_eq_ok(link_status, link_align,
+ dp->link_train.lane_count)) {
+ DRM_DEV_ERROR(dp->dev, "Channel EQ failed\n");
+ analogix_dp_reduce_link_rate(dp);
+ return -EIO;
+ }
+ }
+
+ return 0;
+}
+
+static int analogix_dp_train_link(struct analogix_dp_device *dp)
+{
+ if (dp->fast_train_enable)
+ return analogix_dp_fast_link_train(dp);
+
+ return analogix_dp_full_link_train(dp, dp->video_info.max_lane_count,
+ dp->video_info.max_link_rate);
+}
+
+static int analogix_dp_config_video(struct analogix_dp_device *dp)
+{
+ int timeout_loop = 0;
+ int done_count = 0;
+
+ analogix_dp_config_video_slave_mode(dp);
+
+ analogix_dp_set_video_color_format(dp);
+
+ if (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
+ dev_err(dp->dev, "PLL is not locked yet.\n");
+ return -EINVAL;
+ }
+
+ for (;;) {
+ timeout_loop++;
+ if (analogix_dp_is_slave_video_stream_clock_on(dp) == 0)
+ break;
+ if (timeout_loop > DP_TIMEOUT_LOOP_COUNT) {
+ dev_err(dp->dev, "Timeout of slave video streamclk ok\n");
+ return -ETIMEDOUT;
+ }
+ usleep_range(1000, 1001);
+ }
+
+ /* Set to use the register calculated M/N video */
+ analogix_dp_set_video_cr_mn(dp, CALCULATED_M, 0, 0);
+
+ /* For video bist, Video timing must be generated by register */
+ analogix_dp_set_video_timing_mode(dp, VIDEO_TIMING_FROM_CAPTURE);
+
+ /* Disable video mute */
+ analogix_dp_enable_video_mute(dp, 0);
+
+ /* Configure video slave mode */
+ analogix_dp_enable_video_master(dp, 0);
+
+ /* Enable video */
+ analogix_dp_start_video(dp);
+
+ timeout_loop = 0;
+
+ for (;;) {
+ timeout_loop++;
+ if (analogix_dp_is_video_stream_on(dp) == 0) {
+ done_count++;
+ if (done_count > 10)
+ break;
+ } else if (done_count) {
+ done_count = 0;
+ }
+ if (timeout_loop > DP_TIMEOUT_LOOP_COUNT) {
+ dev_warn(dp->dev,
+ "Ignoring timeout of video streamclk ok\n");
+ break;
+ }
+
+ usleep_range(1000, 1001);
+ }
+
+ return 0;
+}
+
+static int analogix_dp_enable_scramble(struct analogix_dp_device *dp,
+ bool enable)
+{
+ u8 data;
+ int ret;
+
+ if (enable) {
+ analogix_dp_enable_scrambling(dp);
+
+ ret = drm_dp_dpcd_readb(&dp->aux, DP_TRAINING_PATTERN_SET,
+ &data);
+ if (ret != 1)
+ return ret;
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET,
+ (u8)(data & ~DP_LINK_SCRAMBLING_DISABLE));
+ } else {
+ analogix_dp_disable_scrambling(dp);
+
+ ret = drm_dp_dpcd_readb(&dp->aux, DP_TRAINING_PATTERN_SET,
+ &data);
+ if (ret != 1)
+ return ret;
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET,
+ (u8)(data | DP_LINK_SCRAMBLING_DISABLE));
+ }
+ return ret < 0 ? ret : 0;
+}
+
+static irqreturn_t analogix_dp_hardirq(int irq, void *arg)
+{
+ struct analogix_dp_device *dp = arg;
+ irqreturn_t ret = IRQ_NONE;
+ enum dp_irq_type irq_type;
+
+ irq_type = analogix_dp_get_irq_type(dp);
+ if (irq_type != DP_IRQ_TYPE_UNKNOWN) {
+ analogix_dp_mute_hpd_interrupt(dp);
+ ret = IRQ_WAKE_THREAD;
+ }
+
+ return ret;
+}
+
+static irqreturn_t analogix_dp_irq_thread(int irq, void *arg)
+{
+ struct analogix_dp_device *dp = arg;
+ enum dp_irq_type irq_type;
+
+ irq_type = analogix_dp_get_irq_type(dp);
+ if (irq_type & DP_IRQ_TYPE_HP_CABLE_IN ||
+ irq_type & DP_IRQ_TYPE_HP_CABLE_OUT) {
+ dev_dbg(dp->dev, "Detected cable status changed!\n");
+ if (dp->drm_dev)
+ drm_helper_hpd_irq_event(dp->drm_dev);
+ }
+
+ if (irq_type != DP_IRQ_TYPE_UNKNOWN) {
+ analogix_dp_clear_hotplug_interrupts(dp);
+ analogix_dp_unmute_hpd_interrupt(dp);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int analogix_dp_fast_link_train_detection(struct analogix_dp_device *dp)
+{
+ int ret;
+ u8 spread;
+
+ ret = drm_dp_dpcd_readb(&dp->aux, DP_MAX_DOWNSPREAD, &spread);
+ if (ret != 1) {
+ dev_err(dp->dev, "failed to read downspread %d\n", ret);
+ return ret;
+ }
+ dp->fast_train_enable = !!(spread & DP_NO_AUX_HANDSHAKE_LINK_TRAINING);
+ dev_dbg(dp->dev, "fast link training %s\n",
+ dp->fast_train_enable ? "supported" : "unsupported");
+ return 0;
+}
+
+static int analogix_dp_commit(struct analogix_dp_device *dp)
+{
+ int ret;
+
+ /* Keep the panel disabled while we configure video */
+ if (dp->plat_data->panel) {
+ if (drm_panel_disable(dp->plat_data->panel))
+ DRM_ERROR("failed to disable the panel\n");
+ }
+
+ ret = analogix_dp_train_link(dp);
+ if (ret) {
+ dev_err(dp->dev, "unable to do link train, ret=%d\n", ret);
+ return ret;
+ }
+
+ ret = analogix_dp_enable_scramble(dp, 1);
+ if (ret < 0) {
+ dev_err(dp->dev, "can not enable scramble\n");
+ return ret;
+ }
+
+ analogix_dp_init_video(dp);
+ ret = analogix_dp_config_video(dp);
+ if (ret) {
+ dev_err(dp->dev, "unable to config video\n");
+ return ret;
+ }
+
+ /* Safe to enable the panel now */
+ if (dp->plat_data->panel) {
+ ret = drm_panel_enable(dp->plat_data->panel);
+ if (ret) {
+ DRM_ERROR("failed to enable the panel\n");
+ return ret;
+ }
+ }
+
+ /* Check whether panel supports fast training */
+ ret = analogix_dp_fast_link_train_detection(dp);
+ if (ret)
+ return ret;
+
+ if (analogix_dp_detect_sink_psr(dp)) {
+ ret = analogix_dp_enable_sink_psr(dp);
+ if (ret)
+ return ret;
+ }
+
+ return ret;
+}
+
+static int analogix_dp_enable_psr(struct analogix_dp_device *dp)
+{
+ struct dp_sdp psr_vsc;
+ int ret;
+ u8 sink;
+
+ ret = drm_dp_dpcd_readb(&dp->aux, DP_PSR_STATUS, &sink);
+ if (ret != 1)
+ DRM_DEV_ERROR(dp->dev, "Failed to read psr status %d\n", ret);
+ else if (sink == DP_PSR_SINK_ACTIVE_RFB)
+ return 0;
+
+ /* Prepare VSC packet as per EDP 1.4 spec, Table 6.9 */
+ memset(&psr_vsc, 0, sizeof(psr_vsc));
+ psr_vsc.sdp_header.HB0 = 0;
+ psr_vsc.sdp_header.HB1 = 0x7;
+ psr_vsc.sdp_header.HB2 = 0x2;
+ psr_vsc.sdp_header.HB3 = 0x8;
+ psr_vsc.db[0] = 0;
+ psr_vsc.db[1] = EDP_VSC_PSR_STATE_ACTIVE | EDP_VSC_PSR_CRC_VALUES_VALID;
+
+ ret = analogix_dp_send_psr_spd(dp, &psr_vsc, true);
+ if (!ret)
+ analogix_dp_set_analog_power_down(dp, POWER_ALL, true);
+
+ return ret;
+}
+
+static int analogix_dp_disable_psr(struct analogix_dp_device *dp)
+{
+ struct dp_sdp psr_vsc;
+ int ret;
+ u8 sink;
+
+ analogix_dp_set_analog_power_down(dp, POWER_ALL, false);
+
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
+ if (ret != 1) {
+ DRM_DEV_ERROR(dp->dev, "Failed to set DP Power0 %d\n", ret);
+ return ret;
+ }
+
+ ret = drm_dp_dpcd_readb(&dp->aux, DP_PSR_STATUS, &sink);
+ if (ret != 1) {
+ DRM_DEV_ERROR(dp->dev, "Failed to read psr status %d\n", ret);
+ return ret;
+ } else if (sink == DP_PSR_SINK_INACTIVE) {
+ DRM_DEV_ERROR(dp->dev, "sink inactive, skip disable psr");
+ return 0;
+ }
+
+ ret = analogix_dp_train_link(dp);
+ if (ret) {
+ DRM_DEV_ERROR(dp->dev, "Failed to train the link %d\n", ret);
+ return ret;
+ }
+
+ /* Prepare VSC packet as per EDP 1.4 spec, Table 6.9 */
+ memset(&psr_vsc, 0, sizeof(psr_vsc));
+ psr_vsc.sdp_header.HB0 = 0;
+ psr_vsc.sdp_header.HB1 = 0x7;
+ psr_vsc.sdp_header.HB2 = 0x2;
+ psr_vsc.sdp_header.HB3 = 0x8;
+
+ psr_vsc.db[0] = 0;
+ psr_vsc.db[1] = 0;
+
+ return analogix_dp_send_psr_spd(dp, &psr_vsc, true);
+}
+
+/*
+ * This function is a bit of a catch-all for panel preparation, hopefully
+ * simplifying the logic of functions that need to prepare/unprepare the panel
+ * below.
+ *
+ * If @prepare is true, this function will prepare the panel. Conversely, if it
+ * is false, the panel will be unprepared.
+ *
+ * If @is_modeset_prepare is true, the function will disregard the current state
+ * of the panel and either prepare/unprepare the panel based on @prepare. Once
+ * it finishes, it will update dp->panel_is_modeset to reflect the current state
+ * of the panel.
+ */
+static int analogix_dp_prepare_panel(struct analogix_dp_device *dp,
+ bool prepare, bool is_modeset_prepare)
+{
+ int ret = 0;
+
+ if (!dp->plat_data->panel)
+ return 0;
+
+ mutex_lock(&dp->panel_lock);
+
+ /*
+ * Exit early if this is a temporary prepare/unprepare and we're already
+ * modeset (since we neither want to prepare twice or unprepare early).
+ */
+ if (dp->panel_is_modeset && !is_modeset_prepare)
+ goto out;
+
+ if (prepare)
+ ret = drm_panel_prepare(dp->plat_data->panel);
+ else
+ ret = drm_panel_unprepare(dp->plat_data->panel);
+
+ if (ret)
+ goto out;
+
+ if (is_modeset_prepare)
+ dp->panel_is_modeset = prepare;
+
+out:
+ mutex_unlock(&dp->panel_lock);
+ return ret;
+}
+
+static int analogix_dp_get_modes(struct drm_connector *connector)
+{
+ struct analogix_dp_device *dp = to_dp(connector);
+ struct edid *edid;
+ int ret, num_modes = 0;
+
+ if (dp->plat_data->panel) {
+ num_modes += drm_panel_get_modes(dp->plat_data->panel, connector);
+ } else {
+ ret = analogix_dp_prepare_panel(dp, true, false);
+ if (ret) {
+ DRM_ERROR("Failed to prepare panel (%d)\n", ret);
+ return 0;
+ }
+
+ edid = drm_get_edid(connector, &dp->aux.ddc);
+ if (edid) {
+ drm_connector_update_edid_property(&dp->connector,
+ edid);
+ num_modes += drm_add_edid_modes(&dp->connector, edid);
+ kfree(edid);
+ }
+
+ ret = analogix_dp_prepare_panel(dp, false, false);
+ if (ret)
+ DRM_ERROR("Failed to unprepare panel (%d)\n", ret);
+ }
+
+ if (dp->plat_data->get_modes)
+ num_modes += dp->plat_data->get_modes(dp->plat_data, connector);
+
+ return num_modes;
+}
+
+static struct drm_encoder *
+analogix_dp_best_encoder(struct drm_connector *connector)
+{
+ struct analogix_dp_device *dp = to_dp(connector);
+
+ return dp->encoder;
+}
+
+
+static int analogix_dp_atomic_check(struct drm_connector *connector,
+ struct drm_atomic_state *state)
+{
+ struct analogix_dp_device *dp = to_dp(connector);
+ struct drm_connector_state *conn_state;
+ struct drm_crtc_state *crtc_state;
+
+ conn_state = drm_atomic_get_new_connector_state(state, connector);
+ if (WARN_ON(!conn_state))
+ return -ENODEV;
+
+ conn_state->self_refresh_aware = true;
+
+ if (!conn_state->crtc)
+ return 0;
+
+ crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
+ if (!crtc_state)
+ return 0;
+
+ if (crtc_state->self_refresh_active && !dp->psr_supported)
+ return -EINVAL;
+
+ return 0;
+}
+
+static const struct drm_connector_helper_funcs analogix_dp_connector_helper_funcs = {
+ .get_modes = analogix_dp_get_modes,
+ .best_encoder = analogix_dp_best_encoder,
+ .atomic_check = analogix_dp_atomic_check,
+};
+
+static enum drm_connector_status
+analogix_dp_detect(struct drm_connector *connector, bool force)
+{
+ struct analogix_dp_device *dp = to_dp(connector);
+ enum drm_connector_status status = connector_status_disconnected;
+ int ret;
+
+ if (dp->plat_data->panel)
+ return connector_status_connected;
+
+ ret = analogix_dp_prepare_panel(dp, true, false);
+ if (ret) {
+ DRM_ERROR("Failed to prepare panel (%d)\n", ret);
+ return connector_status_disconnected;
+ }
+
+ if (!analogix_dp_detect_hpd(dp))
+ status = connector_status_connected;
+
+ ret = analogix_dp_prepare_panel(dp, false, false);
+ if (ret)
+ DRM_ERROR("Failed to unprepare panel (%d)\n", ret);
+
+ return status;
+}
+
+static const struct drm_connector_funcs analogix_dp_connector_funcs = {
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .detect = analogix_dp_detect,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int analogix_dp_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct analogix_dp_device *dp = bridge->driver_private;
+ struct drm_encoder *encoder = dp->encoder;
+ struct drm_connector *connector = NULL;
+ int ret = 0;
+
+ if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) {
+ DRM_ERROR("Fix bridge driver to make connector optional!");
+ return -EINVAL;
+ }
+
+ if (!bridge->encoder) {
+ DRM_ERROR("Parent encoder object not found");
+ return -ENODEV;
+ }
+
+ if (!dp->plat_data->skip_connector) {
+ connector = &dp->connector;
+ connector->polled = DRM_CONNECTOR_POLL_HPD;
+
+ ret = drm_connector_init(dp->drm_dev, connector,
+ &analogix_dp_connector_funcs,
+ DRM_MODE_CONNECTOR_eDP);
+ if (ret) {
+ DRM_ERROR("Failed to initialize connector with drm\n");
+ return ret;
+ }
+
+ drm_connector_helper_add(connector,
+ &analogix_dp_connector_helper_funcs);
+ drm_connector_attach_encoder(connector, encoder);
+ }
+
+ /*
+ * NOTE: the connector registration is implemented in analogix
+ * platform driver, that to say connector would be exist after
+ * plat_data->attch return, that's why we record the connector
+ * point after plat attached.
+ */
+ if (dp->plat_data->attach) {
+ ret = dp->plat_data->attach(dp->plat_data, bridge, connector);
+ if (ret) {
+ DRM_ERROR("Failed at platform attach func\n");
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static
+struct drm_crtc *analogix_dp_get_old_crtc(struct analogix_dp_device *dp,
+ struct drm_atomic_state *state)
+{
+ struct drm_encoder *encoder = dp->encoder;
+ struct drm_connector *connector;
+ struct drm_connector_state *conn_state;
+
+ connector = drm_atomic_get_old_connector_for_encoder(state, encoder);
+ if (!connector)
+ return NULL;
+
+ conn_state = drm_atomic_get_old_connector_state(state, connector);
+ if (!conn_state)
+ return NULL;
+
+ return conn_state->crtc;
+}
+
+static
+struct drm_crtc *analogix_dp_get_new_crtc(struct analogix_dp_device *dp,
+ struct drm_atomic_state *state)
+{
+ struct drm_encoder *encoder = dp->encoder;
+ struct drm_connector *connector;
+ struct drm_connector_state *conn_state;
+
+ connector = drm_atomic_get_new_connector_for_encoder(state, encoder);
+ if (!connector)
+ return NULL;
+
+ conn_state = drm_atomic_get_new_connector_state(state, connector);
+ if (!conn_state)
+ return NULL;
+
+ return conn_state->crtc;
+}
+
+static void
+analogix_dp_bridge_atomic_pre_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct drm_atomic_state *old_state = old_bridge_state->base.state;
+ struct analogix_dp_device *dp = bridge->driver_private;
+ struct drm_crtc *crtc;
+ struct drm_crtc_state *old_crtc_state;
+ int ret;
+
+ crtc = analogix_dp_get_new_crtc(dp, old_state);
+ if (!crtc)
+ return;
+
+ old_crtc_state = drm_atomic_get_old_crtc_state(old_state, crtc);
+ /* Don't touch the panel if we're coming back from PSR */
+ if (old_crtc_state && old_crtc_state->self_refresh_active)
+ return;
+
+ ret = analogix_dp_prepare_panel(dp, true, true);
+ if (ret)
+ DRM_ERROR("failed to setup the panel ret = %d\n", ret);
+}
+
+static int analogix_dp_set_bridge(struct analogix_dp_device *dp)
+{
+ int ret;
+
+ pm_runtime_get_sync(dp->dev);
+
+ ret = clk_prepare_enable(dp->clock);
+ if (ret < 0) {
+ DRM_ERROR("Failed to prepare_enable the clock clk [%d]\n", ret);
+ goto out_dp_clk_pre;
+ }
+
+ if (dp->plat_data->power_on_start)
+ dp->plat_data->power_on_start(dp->plat_data);
+
+ phy_power_on(dp->phy);
+
+ ret = analogix_dp_init_dp(dp);
+ if (ret)
+ goto out_dp_init;
+
+ /*
+ * According to DP spec v1.3 chap 3.5.1.2 Link Training,
+ * We should first make sure the HPD signal is asserted high by device
+ * when we want to establish a link with it.
+ */
+ ret = analogix_dp_detect_hpd(dp);
+ if (ret) {
+ DRM_ERROR("failed to get hpd single ret = %d\n", ret);
+ goto out_dp_init;
+ }
+
+ ret = analogix_dp_commit(dp);
+ if (ret) {
+ DRM_ERROR("dp commit error, ret = %d\n", ret);
+ goto out_dp_init;
+ }
+
+ if (dp->plat_data->power_on_end)
+ dp->plat_data->power_on_end(dp->plat_data);
+
+ enable_irq(dp->irq);
+ return 0;
+
+out_dp_init:
+ phy_power_off(dp->phy);
+ if (dp->plat_data->power_off)
+ dp->plat_data->power_off(dp->plat_data);
+ clk_disable_unprepare(dp->clock);
+out_dp_clk_pre:
+ pm_runtime_put_sync(dp->dev);
+
+ return ret;
+}
+
+static void
+analogix_dp_bridge_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct drm_atomic_state *old_state = old_bridge_state->base.state;
+ struct analogix_dp_device *dp = bridge->driver_private;
+ struct drm_crtc *crtc;
+ struct drm_crtc_state *old_crtc_state;
+ int timeout_loop = 0;
+ int ret;
+
+ crtc = analogix_dp_get_new_crtc(dp, old_state);
+ if (!crtc)
+ return;
+
+ old_crtc_state = drm_atomic_get_old_crtc_state(old_state, crtc);
+ /* Not a full enable, just disable PSR and continue */
+ if (old_crtc_state && old_crtc_state->self_refresh_active) {
+ ret = analogix_dp_disable_psr(dp);
+ if (ret)
+ DRM_ERROR("Failed to disable psr %d\n", ret);
+ return;
+ }
+
+ if (dp->dpms_mode == DRM_MODE_DPMS_ON)
+ return;
+
+ while (timeout_loop < MAX_PLL_LOCK_LOOP) {
+ if (analogix_dp_set_bridge(dp) == 0) {
+ dp->dpms_mode = DRM_MODE_DPMS_ON;
+ return;
+ }
+ dev_err(dp->dev, "failed to set bridge, retry: %d\n",
+ timeout_loop);
+ timeout_loop++;
+ usleep_range(10, 11);
+ }
+ dev_err(dp->dev, "too many times retry set bridge, give it up\n");
+}
+
+static void analogix_dp_bridge_disable(struct drm_bridge *bridge)
+{
+ struct analogix_dp_device *dp = bridge->driver_private;
+ int ret;
+
+ if (dp->dpms_mode != DRM_MODE_DPMS_ON)
+ return;
+
+ if (dp->plat_data->panel) {
+ if (drm_panel_disable(dp->plat_data->panel)) {
+ DRM_ERROR("failed to disable the panel\n");
+ return;
+ }
+ }
+
+ disable_irq(dp->irq);
+
+ if (dp->plat_data->power_off)
+ dp->plat_data->power_off(dp->plat_data);
+
+ analogix_dp_set_analog_power_down(dp, POWER_ALL, 1);
+ phy_power_off(dp->phy);
+
+ clk_disable_unprepare(dp->clock);
+
+ pm_runtime_put_sync(dp->dev);
+
+ ret = analogix_dp_prepare_panel(dp, false, true);
+ if (ret)
+ DRM_ERROR("failed to setup the panel ret = %d\n", ret);
+
+ dp->fast_train_enable = false;
+ dp->psr_supported = false;
+ dp->dpms_mode = DRM_MODE_DPMS_OFF;
+}
+
+static void
+analogix_dp_bridge_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct drm_atomic_state *old_state = old_bridge_state->base.state;
+ struct analogix_dp_device *dp = bridge->driver_private;
+ struct drm_crtc *old_crtc, *new_crtc;
+ struct drm_crtc_state *old_crtc_state = NULL;
+ struct drm_crtc_state *new_crtc_state = NULL;
+ int ret;
+
+ new_crtc = analogix_dp_get_new_crtc(dp, old_state);
+ if (!new_crtc)
+ goto out;
+
+ new_crtc_state = drm_atomic_get_new_crtc_state(old_state, new_crtc);
+ if (!new_crtc_state)
+ goto out;
+
+ /* Don't do a full disable on PSR transitions */
+ if (new_crtc_state->self_refresh_active)
+ return;
+
+out:
+ old_crtc = analogix_dp_get_old_crtc(dp, old_state);
+ if (old_crtc) {
+ old_crtc_state = drm_atomic_get_old_crtc_state(old_state,
+ old_crtc);
+
+ /* When moving from PSR to fully disabled, exit PSR first. */
+ if (old_crtc_state && old_crtc_state->self_refresh_active) {
+ ret = analogix_dp_disable_psr(dp);
+ if (ret)
+ DRM_ERROR("Failed to disable psr (%d)\n", ret);
+ }
+ }
+
+ analogix_dp_bridge_disable(bridge);
+}
+
+static void
+analogix_dp_bridge_atomic_post_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct drm_atomic_state *old_state = old_bridge_state->base.state;
+ struct analogix_dp_device *dp = bridge->driver_private;
+ struct drm_crtc *crtc;
+ struct drm_crtc_state *new_crtc_state;
+ int ret;
+
+ crtc = analogix_dp_get_new_crtc(dp, old_state);
+ if (!crtc)
+ return;
+
+ new_crtc_state = drm_atomic_get_new_crtc_state(old_state, crtc);
+ if (!new_crtc_state || !new_crtc_state->self_refresh_active)
+ return;
+
+ ret = analogix_dp_enable_psr(dp);
+ if (ret)
+ DRM_ERROR("Failed to enable psr (%d)\n", ret);
+}
+
+static void analogix_dp_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *orig_mode,
+ const struct drm_display_mode *mode)
+{
+ struct analogix_dp_device *dp = bridge->driver_private;
+ struct drm_display_info *display_info = &dp->connector.display_info;
+ struct video_info *video = &dp->video_info;
+ struct device_node *dp_node = dp->dev->of_node;
+ int vic;
+
+ /* Input video interlaces & hsync pol & vsync pol */
+ video->interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
+ video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
+ video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
+
+ /* Input video dynamic_range & colorimetry */
+ vic = drm_match_cea_mode(mode);
+ if ((vic == 6) || (vic == 7) || (vic == 21) || (vic == 22) ||
+ (vic == 2) || (vic == 3) || (vic == 17) || (vic == 18)) {
+ video->dynamic_range = CEA;
+ video->ycbcr_coeff = COLOR_YCBCR601;
+ } else if (vic) {
+ video->dynamic_range = CEA;
+ video->ycbcr_coeff = COLOR_YCBCR709;
+ } else {
+ video->dynamic_range = VESA;
+ video->ycbcr_coeff = COLOR_YCBCR709;
+ }
+
+ /* Input vide bpc and color_formats */
+ switch (display_info->bpc) {
+ case 12:
+ video->color_depth = COLOR_12;
+ break;
+ case 10:
+ video->color_depth = COLOR_10;
+ break;
+ case 8:
+ video->color_depth = COLOR_8;
+ break;
+ case 6:
+ video->color_depth = COLOR_6;
+ break;
+ default:
+ video->color_depth = COLOR_8;
+ break;
+ }
+ if (display_info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
+ video->color_space = COLOR_YCBCR444;
+ else if (display_info->color_formats & DRM_COLOR_FORMAT_YCBCR422)
+ video->color_space = COLOR_YCBCR422;
+ else
+ video->color_space = COLOR_RGB;
+
+ /*
+ * NOTE: those property parsing code is used for providing backward
+ * compatibility for samsung platform.
+ * Due to we used the "of_property_read_u32" interfaces, when this
+ * property isn't present, the "video_info" can keep the original
+ * values and wouldn't be modified.
+ */
+ of_property_read_u32(dp_node, "samsung,color-space",
+ &video->color_space);
+ of_property_read_u32(dp_node, "samsung,dynamic-range",
+ &video->dynamic_range);
+ of_property_read_u32(dp_node, "samsung,ycbcr-coeff",
+ &video->ycbcr_coeff);
+ of_property_read_u32(dp_node, "samsung,color-depth",
+ &video->color_depth);
+ if (of_property_read_bool(dp_node, "hsync-active-high"))
+ video->h_sync_polarity = true;
+ if (of_property_read_bool(dp_node, "vsync-active-high"))
+ video->v_sync_polarity = true;
+ if (of_property_read_bool(dp_node, "interlaced"))
+ video->interlaced = true;
+}
+
+static const struct drm_bridge_funcs analogix_dp_bridge_funcs = {
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .atomic_pre_enable = analogix_dp_bridge_atomic_pre_enable,
+ .atomic_enable = analogix_dp_bridge_atomic_enable,
+ .atomic_disable = analogix_dp_bridge_atomic_disable,
+ .atomic_post_disable = analogix_dp_bridge_atomic_post_disable,
+ .mode_set = analogix_dp_bridge_mode_set,
+ .attach = analogix_dp_bridge_attach,
+};
+
+static int analogix_dp_create_bridge(struct drm_device *drm_dev,
+ struct analogix_dp_device *dp)
+{
+ struct drm_bridge *bridge;
+
+ bridge = devm_kzalloc(drm_dev->dev, sizeof(*bridge), GFP_KERNEL);
+ if (!bridge) {
+ DRM_ERROR("failed to allocate for drm bridge\n");
+ return -ENOMEM;
+ }
+
+ dp->bridge = bridge;
+
+ bridge->driver_private = dp;
+ bridge->funcs = &analogix_dp_bridge_funcs;
+
+ return drm_bridge_attach(dp->encoder, bridge, NULL, 0);
+}
+
+static int analogix_dp_dt_parse_pdata(struct analogix_dp_device *dp)
+{
+ struct device_node *dp_node = dp->dev->of_node;
+ struct video_info *video_info = &dp->video_info;
+
+ switch (dp->plat_data->dev_type) {
+ case RK3288_DP:
+ case RK3399_EDP:
+ /*
+ * Like Rk3288 DisplayPort TRM indicate that "Main link
+ * containing 4 physical lanes of 2.7/1.62 Gbps/lane".
+ */
+ video_info->max_link_rate = 0x0A;
+ video_info->max_lane_count = 0x04;
+ break;
+ case EXYNOS_DP:
+ /*
+ * NOTE: those property parseing code is used for
+ * providing backward compatibility for samsung platform.
+ */
+ of_property_read_u32(dp_node, "samsung,link-rate",
+ &video_info->max_link_rate);
+ of_property_read_u32(dp_node, "samsung,lane-count",
+ &video_info->max_lane_count);
+ break;
+ }
+
+ return 0;
+}
+
+static ssize_t analogix_dpaux_transfer(struct drm_dp_aux *aux,
+ struct drm_dp_aux_msg *msg)
+{
+ struct analogix_dp_device *dp = to_dp(aux);
+ int ret;
+
+ pm_runtime_get_sync(dp->dev);
+
+ ret = analogix_dp_detect_hpd(dp);
+ if (ret)
+ goto out;
+
+ ret = analogix_dp_transfer(dp, msg);
+out:
+ pm_runtime_mark_last_busy(dp->dev);
+ pm_runtime_put_autosuspend(dp->dev);
+
+ return ret;
+}
+
+struct analogix_dp_device *
+analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct analogix_dp_device *dp;
+ struct resource *res;
+ unsigned int irq_flags;
+ int ret;
+
+ if (!plat_data) {
+ dev_err(dev, "Invalided input plat_data\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ dp = devm_kzalloc(dev, sizeof(struct analogix_dp_device), GFP_KERNEL);
+ if (!dp)
+ return ERR_PTR(-ENOMEM);
+
+ dp->dev = &pdev->dev;
+ dp->dpms_mode = DRM_MODE_DPMS_OFF;
+
+ mutex_init(&dp->panel_lock);
+ dp->panel_is_modeset = false;
+
+ /*
+ * platform dp driver need containor_of the plat_data to get
+ * the driver private data, so we need to store the point of
+ * plat_data, not the context of plat_data.
+ */
+ dp->plat_data = plat_data;
+
+ ret = analogix_dp_dt_parse_pdata(dp);
+ if (ret)
+ return ERR_PTR(ret);
+
+ dp->phy = devm_phy_get(dp->dev, "dp");
+ if (IS_ERR(dp->phy)) {
+ dev_err(dp->dev, "no DP phy configured\n");
+ ret = PTR_ERR(dp->phy);
+ if (ret) {
+ /*
+ * phy itself is not enabled, so we can move forward
+ * assigning NULL to phy pointer.
+ */
+ if (ret == -ENOSYS || ret == -ENODEV)
+ dp->phy = NULL;
+ else
+ return ERR_PTR(ret);
+ }
+ }
+
+ dp->clock = devm_clk_get(&pdev->dev, "dp");
+ if (IS_ERR(dp->clock)) {
+ dev_err(&pdev->dev, "failed to get clock\n");
+ return ERR_CAST(dp->clock);
+ }
+
+ clk_prepare_enable(dp->clock);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ dp->reg_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(dp->reg_base)) {
+ ret = PTR_ERR(dp->reg_base);
+ goto err_disable_clk;
+ }
+
+ dp->force_hpd = of_property_read_bool(dev->of_node, "force-hpd");
+
+ /* Try two different names */
+ dp->hpd_gpiod = devm_gpiod_get_optional(dev, "hpd", GPIOD_IN);
+ if (!dp->hpd_gpiod)
+ dp->hpd_gpiod = devm_gpiod_get_optional(dev, "samsung,hpd",
+ GPIOD_IN);
+ if (IS_ERR(dp->hpd_gpiod)) {
+ dev_err(dev, "error getting HDP GPIO: %ld\n",
+ PTR_ERR(dp->hpd_gpiod));
+ ret = PTR_ERR(dp->hpd_gpiod);
+ goto err_disable_clk;
+ }
+
+ if (dp->hpd_gpiod) {
+ /*
+ * Set up the hotplug GPIO from the device tree as an interrupt.
+ * Simply specifying a different interrupt in the device tree
+ * doesn't work since we handle hotplug rather differently when
+ * using a GPIO. We also need the actual GPIO specifier so
+ * that we can get the current state of the GPIO.
+ */
+ dp->irq = gpiod_to_irq(dp->hpd_gpiod);
+ irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING;
+ } else {
+ dp->irq = platform_get_irq(pdev, 0);
+ irq_flags = 0;
+ }
+
+ if (dp->irq == -ENXIO) {
+ dev_err(&pdev->dev, "failed to get irq\n");
+ ret = -ENODEV;
+ goto err_disable_clk;
+ }
+
+ ret = devm_request_threaded_irq(&pdev->dev, dp->irq,
+ analogix_dp_hardirq,
+ analogix_dp_irq_thread,
+ irq_flags, "analogix-dp", dp);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request irq\n");
+ goto err_disable_clk;
+ }
+ disable_irq(dp->irq);
+
+ return dp;
+
+err_disable_clk:
+ clk_disable_unprepare(dp->clock);
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(analogix_dp_probe);
+
+int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev)
+{
+ int ret;
+
+ dp->drm_dev = drm_dev;
+ dp->encoder = dp->plat_data->encoder;
+
+ dp->aux.name = "DP-AUX";
+ dp->aux.transfer = analogix_dpaux_transfer;
+ dp->aux.dev = dp->dev;
+ dp->aux.drm_dev = drm_dev;
+
+ ret = drm_dp_aux_register(&dp->aux);
+ if (ret)
+ return ret;
+
+ pm_runtime_use_autosuspend(dp->dev);
+ pm_runtime_set_autosuspend_delay(dp->dev, 100);
+ pm_runtime_enable(dp->dev);
+
+ ret = analogix_dp_create_bridge(drm_dev, dp);
+ if (ret) {
+ DRM_ERROR("failed to create bridge (%d)\n", ret);
+ goto err_disable_pm_runtime;
+ }
+
+ return 0;
+
+err_disable_pm_runtime:
+ pm_runtime_dont_use_autosuspend(dp->dev);
+ pm_runtime_disable(dp->dev);
+ drm_dp_aux_unregister(&dp->aux);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(analogix_dp_bind);
+
+void analogix_dp_unbind(struct analogix_dp_device *dp)
+{
+ analogix_dp_bridge_disable(dp->bridge);
+ dp->connector.funcs->destroy(&dp->connector);
+
+ if (dp->plat_data->panel) {
+ if (drm_panel_unprepare(dp->plat_data->panel))
+ DRM_ERROR("failed to turnoff the panel\n");
+ }
+
+ drm_dp_aux_unregister(&dp->aux);
+ pm_runtime_dont_use_autosuspend(dp->dev);
+ pm_runtime_disable(dp->dev);
+}
+EXPORT_SYMBOL_GPL(analogix_dp_unbind);
+
+void analogix_dp_remove(struct analogix_dp_device *dp)
+{
+ clk_disable_unprepare(dp->clock);
+}
+EXPORT_SYMBOL_GPL(analogix_dp_remove);
+
+#ifdef CONFIG_PM
+int analogix_dp_suspend(struct analogix_dp_device *dp)
+{
+ clk_disable_unprepare(dp->clock);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(analogix_dp_suspend);
+
+int analogix_dp_resume(struct analogix_dp_device *dp)
+{
+ int ret;
+
+ ret = clk_prepare_enable(dp->clock);
+ if (ret < 0) {
+ DRM_ERROR("Failed to prepare_enable the clock clk [%d]\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(analogix_dp_resume);
+#endif
+
+int analogix_dp_start_crc(struct drm_connector *connector)
+{
+ struct analogix_dp_device *dp = to_dp(connector);
+
+ if (!connector->state->crtc) {
+ DRM_ERROR("Connector %s doesn't currently have a CRTC.\n",
+ connector->name);
+ return -EINVAL;
+ }
+
+ return drm_dp_start_crc(&dp->aux, connector->state->crtc);
+}
+EXPORT_SYMBOL_GPL(analogix_dp_start_crc);
+
+int analogix_dp_stop_crc(struct drm_connector *connector)
+{
+ struct analogix_dp_device *dp = to_dp(connector);
+
+ return drm_dp_stop_crc(&dp->aux);
+}
+EXPORT_SYMBOL_GPL(analogix_dp_stop_crc);
+
+MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
+MODULE_DESCRIPTION("Analogix DP Core Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
new file mode 100644
index 000000000..433f2d7ef
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
@@ -0,0 +1,259 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Header file for Analogix DP (Display Port) core interface driver.
+ *
+ * Copyright (C) 2012 Samsung Electronics Co., Ltd.
+ * Author: Jingoo Han <jg1.han@samsung.com>
+ */
+
+#ifndef _ANALOGIX_DP_CORE_H
+#define _ANALOGIX_DP_CORE_H
+
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm_crtc.h>
+
+#define DP_TIMEOUT_LOOP_COUNT 100
+#define MAX_CR_LOOP 5
+#define MAX_EQ_LOOP 5
+#define MAX_PLL_LOCK_LOOP 5
+
+/* Training takes 22ms if AUX channel comm fails. Use this as retry interval */
+#define DP_TIMEOUT_TRAINING_US 22000
+#define DP_TIMEOUT_PSR_LOOP_MS 300
+
+/* DP_MAX_LANE_COUNT */
+#define DPCD_ENHANCED_FRAME_CAP(x) (((x) >> 7) & 0x1)
+#define DPCD_MAX_LANE_COUNT(x) ((x) & 0x1f)
+
+/* DP_LANE_COUNT_SET */
+#define DPCD_LANE_COUNT_SET(x) ((x) & 0x1f)
+
+/* DP_TRAINING_LANE0_SET */
+#define DPCD_PRE_EMPHASIS_SET(x) (((x) & 0x3) << 3)
+#define DPCD_PRE_EMPHASIS_GET(x) (((x) >> 3) & 0x3)
+#define DPCD_VOLTAGE_SWING_SET(x) (((x) & 0x3) << 0)
+#define DPCD_VOLTAGE_SWING_GET(x) (((x) >> 0) & 0x3)
+
+struct gpio_desc;
+
+enum link_lane_count_type {
+ LANE_COUNT1 = 1,
+ LANE_COUNT2 = 2,
+ LANE_COUNT4 = 4
+};
+
+enum link_training_state {
+ START,
+ CLOCK_RECOVERY,
+ EQUALIZER_TRAINING,
+ FINISHED,
+ FAILED
+};
+
+enum voltage_swing_level {
+ VOLTAGE_LEVEL_0,
+ VOLTAGE_LEVEL_1,
+ VOLTAGE_LEVEL_2,
+ VOLTAGE_LEVEL_3,
+};
+
+enum pre_emphasis_level {
+ PRE_EMPHASIS_LEVEL_0,
+ PRE_EMPHASIS_LEVEL_1,
+ PRE_EMPHASIS_LEVEL_2,
+ PRE_EMPHASIS_LEVEL_3,
+};
+
+enum pattern_set {
+ PRBS7,
+ D10_2,
+ TRAINING_PTN1,
+ TRAINING_PTN2,
+ DP_NONE
+};
+
+enum color_space {
+ COLOR_RGB,
+ COLOR_YCBCR422,
+ COLOR_YCBCR444
+};
+
+enum color_depth {
+ COLOR_6,
+ COLOR_8,
+ COLOR_10,
+ COLOR_12
+};
+
+enum color_coefficient {
+ COLOR_YCBCR601,
+ COLOR_YCBCR709
+};
+
+enum dynamic_range {
+ VESA,
+ CEA
+};
+
+enum pll_status {
+ PLL_UNLOCKED,
+ PLL_LOCKED
+};
+
+enum clock_recovery_m_value_type {
+ CALCULATED_M,
+ REGISTER_M
+};
+
+enum video_timing_recognition_type {
+ VIDEO_TIMING_FROM_CAPTURE,
+ VIDEO_TIMING_FROM_REGISTER
+};
+
+enum analog_power_block {
+ AUX_BLOCK,
+ CH0_BLOCK,
+ CH1_BLOCK,
+ CH2_BLOCK,
+ CH3_BLOCK,
+ ANALOG_TOTAL,
+ POWER_ALL
+};
+
+enum dp_irq_type {
+ DP_IRQ_TYPE_HP_CABLE_IN = BIT(0),
+ DP_IRQ_TYPE_HP_CABLE_OUT = BIT(1),
+ DP_IRQ_TYPE_HP_CHANGE = BIT(2),
+ DP_IRQ_TYPE_UNKNOWN = BIT(3),
+};
+
+struct video_info {
+ char *name;
+
+ bool h_sync_polarity;
+ bool v_sync_polarity;
+ bool interlaced;
+
+ enum color_space color_space;
+ enum dynamic_range dynamic_range;
+ enum color_coefficient ycbcr_coeff;
+ enum color_depth color_depth;
+
+ int max_link_rate;
+ enum link_lane_count_type max_lane_count;
+};
+
+struct link_train {
+ int eq_loop;
+ int cr_loop[4];
+
+ u8 link_rate;
+ u8 lane_count;
+ u8 training_lane[4];
+
+ enum link_training_state lt_state;
+};
+
+struct analogix_dp_device {
+ struct drm_encoder *encoder;
+ struct device *dev;
+ struct drm_device *drm_dev;
+ struct drm_connector connector;
+ struct drm_bridge *bridge;
+ struct drm_dp_aux aux;
+ struct clk *clock;
+ unsigned int irq;
+ void __iomem *reg_base;
+
+ struct video_info video_info;
+ struct link_train link_train;
+ struct phy *phy;
+ int dpms_mode;
+ struct gpio_desc *hpd_gpiod;
+ bool force_hpd;
+ bool fast_train_enable;
+ bool psr_supported;
+
+ struct mutex panel_lock;
+ bool panel_is_modeset;
+
+ struct analogix_dp_plat_data *plat_data;
+};
+
+/* analogix_dp_reg.c */
+void analogix_dp_enable_video_mute(struct analogix_dp_device *dp, bool enable);
+void analogix_dp_stop_video(struct analogix_dp_device *dp);
+void analogix_dp_lane_swap(struct analogix_dp_device *dp, bool enable);
+void analogix_dp_init_analog_param(struct analogix_dp_device *dp);
+void analogix_dp_init_interrupt(struct analogix_dp_device *dp);
+void analogix_dp_reset(struct analogix_dp_device *dp);
+void analogix_dp_swreset(struct analogix_dp_device *dp);
+void analogix_dp_config_interrupt(struct analogix_dp_device *dp);
+void analogix_dp_mute_hpd_interrupt(struct analogix_dp_device *dp);
+void analogix_dp_unmute_hpd_interrupt(struct analogix_dp_device *dp);
+enum pll_status analogix_dp_get_pll_lock_status(struct analogix_dp_device *dp);
+void analogix_dp_set_pll_power_down(struct analogix_dp_device *dp, bool enable);
+void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp,
+ enum analog_power_block block,
+ bool enable);
+int analogix_dp_init_analog_func(struct analogix_dp_device *dp);
+void analogix_dp_init_hpd(struct analogix_dp_device *dp);
+void analogix_dp_force_hpd(struct analogix_dp_device *dp);
+enum dp_irq_type analogix_dp_get_irq_type(struct analogix_dp_device *dp);
+void analogix_dp_clear_hotplug_interrupts(struct analogix_dp_device *dp);
+void analogix_dp_reset_aux(struct analogix_dp_device *dp);
+void analogix_dp_init_aux(struct analogix_dp_device *dp);
+int analogix_dp_get_plug_in_status(struct analogix_dp_device *dp);
+void analogix_dp_enable_sw_function(struct analogix_dp_device *dp);
+void analogix_dp_set_link_bandwidth(struct analogix_dp_device *dp, u32 bwtype);
+void analogix_dp_get_link_bandwidth(struct analogix_dp_device *dp, u32 *bwtype);
+void analogix_dp_set_lane_count(struct analogix_dp_device *dp, u32 count);
+void analogix_dp_get_lane_count(struct analogix_dp_device *dp, u32 *count);
+void analogix_dp_enable_enhanced_mode(struct analogix_dp_device *dp,
+ bool enable);
+void analogix_dp_set_training_pattern(struct analogix_dp_device *dp,
+ enum pattern_set pattern);
+void analogix_dp_set_lane0_pre_emphasis(struct analogix_dp_device *dp,
+ u32 level);
+void analogix_dp_set_lane1_pre_emphasis(struct analogix_dp_device *dp,
+ u32 level);
+void analogix_dp_set_lane2_pre_emphasis(struct analogix_dp_device *dp,
+ u32 level);
+void analogix_dp_set_lane3_pre_emphasis(struct analogix_dp_device *dp,
+ u32 level);
+void analogix_dp_set_lane0_link_training(struct analogix_dp_device *dp,
+ u32 training_lane);
+void analogix_dp_set_lane1_link_training(struct analogix_dp_device *dp,
+ u32 training_lane);
+void analogix_dp_set_lane2_link_training(struct analogix_dp_device *dp,
+ u32 training_lane);
+void analogix_dp_set_lane3_link_training(struct analogix_dp_device *dp,
+ u32 training_lane);
+u32 analogix_dp_get_lane0_link_training(struct analogix_dp_device *dp);
+u32 analogix_dp_get_lane1_link_training(struct analogix_dp_device *dp);
+u32 analogix_dp_get_lane2_link_training(struct analogix_dp_device *dp);
+u32 analogix_dp_get_lane3_link_training(struct analogix_dp_device *dp);
+void analogix_dp_reset_macro(struct analogix_dp_device *dp);
+void analogix_dp_init_video(struct analogix_dp_device *dp);
+
+void analogix_dp_set_video_color_format(struct analogix_dp_device *dp);
+int analogix_dp_is_slave_video_stream_clock_on(struct analogix_dp_device *dp);
+void analogix_dp_set_video_cr_mn(struct analogix_dp_device *dp,
+ enum clock_recovery_m_value_type type,
+ u32 m_value,
+ u32 n_value);
+void analogix_dp_set_video_timing_mode(struct analogix_dp_device *dp, u32 type);
+void analogix_dp_enable_video_master(struct analogix_dp_device *dp,
+ bool enable);
+void analogix_dp_start_video(struct analogix_dp_device *dp);
+int analogix_dp_is_video_stream_on(struct analogix_dp_device *dp);
+void analogix_dp_config_video_slave_mode(struct analogix_dp_device *dp);
+void analogix_dp_enable_scrambling(struct analogix_dp_device *dp);
+void analogix_dp_disable_scrambling(struct analogix_dp_device *dp);
+void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp);
+int analogix_dp_send_psr_spd(struct analogix_dp_device *dp,
+ struct dp_sdp *vsc, bool blocking);
+ssize_t analogix_dp_transfer(struct analogix_dp_device *dp,
+ struct drm_dp_aux_msg *msg);
+
+#endif /* _ANALOGIX_DP_CORE_H */
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
new file mode 100644
index 000000000..6a4f20fcc
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
@@ -0,0 +1,1154 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Analogix DP (Display port) core register interface driver.
+ *
+ * Copyright (C) 2012 Samsung Electronics Co., Ltd.
+ * Author: Jingoo Han <jg1.han@samsung.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+
+#include <drm/bridge/analogix_dp.h>
+
+#include "analogix_dp_core.h"
+#include "analogix_dp_reg.h"
+
+#define COMMON_INT_MASK_1 0
+#define COMMON_INT_MASK_2 0
+#define COMMON_INT_MASK_3 0
+#define COMMON_INT_MASK_4 (HOTPLUG_CHG | HPD_LOST | PLUG)
+#define INT_STA_MASK INT_HPD
+
+void analogix_dp_enable_video_mute(struct analogix_dp_device *dp, bool enable)
+{
+ u32 reg;
+
+ if (enable) {
+ reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
+ reg |= HDCP_VIDEO_MUTE;
+ writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
+ } else {
+ reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
+ reg &= ~HDCP_VIDEO_MUTE;
+ writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
+ }
+}
+
+void analogix_dp_stop_video(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
+ reg &= ~VIDEO_EN;
+ writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
+}
+
+void analogix_dp_lane_swap(struct analogix_dp_device *dp, bool enable)
+{
+ u32 reg;
+
+ if (enable)
+ reg = LANE3_MAP_LOGIC_LANE_0 | LANE2_MAP_LOGIC_LANE_1 |
+ LANE1_MAP_LOGIC_LANE_2 | LANE0_MAP_LOGIC_LANE_3;
+ else
+ reg = LANE3_MAP_LOGIC_LANE_3 | LANE2_MAP_LOGIC_LANE_2 |
+ LANE1_MAP_LOGIC_LANE_1 | LANE0_MAP_LOGIC_LANE_0;
+
+ writel(reg, dp->reg_base + ANALOGIX_DP_LANE_MAP);
+}
+
+void analogix_dp_init_analog_param(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ reg = TX_TERMINAL_CTRL_50_OHM;
+ writel(reg, dp->reg_base + ANALOGIX_DP_ANALOG_CTL_1);
+
+ reg = SEL_24M | TX_DVDD_BIT_1_0625V;
+ writel(reg, dp->reg_base + ANALOGIX_DP_ANALOG_CTL_2);
+
+ if (dp->plat_data && is_rockchip(dp->plat_data->dev_type)) {
+ reg = REF_CLK_24M;
+ if (dp->plat_data->dev_type == RK3288_DP)
+ reg ^= REF_CLK_MASK;
+
+ writel(reg, dp->reg_base + ANALOGIX_DP_PLL_REG_1);
+ writel(0x95, dp->reg_base + ANALOGIX_DP_PLL_REG_2);
+ writel(0x40, dp->reg_base + ANALOGIX_DP_PLL_REG_3);
+ writel(0x58, dp->reg_base + ANALOGIX_DP_PLL_REG_4);
+ writel(0x22, dp->reg_base + ANALOGIX_DP_PLL_REG_5);
+ }
+
+ reg = DRIVE_DVDD_BIT_1_0625V | VCO_BIT_600_MICRO;
+ writel(reg, dp->reg_base + ANALOGIX_DP_ANALOG_CTL_3);
+
+ reg = PD_RING_OSC | AUX_TERMINAL_CTRL_50_OHM |
+ TX_CUR1_2X | TX_CUR_16_MA;
+ writel(reg, dp->reg_base + ANALOGIX_DP_PLL_FILTER_CTL_1);
+
+ reg = CH3_AMP_400_MV | CH2_AMP_400_MV |
+ CH1_AMP_400_MV | CH0_AMP_400_MV;
+ writel(reg, dp->reg_base + ANALOGIX_DP_TX_AMP_TUNING_CTL);
+}
+
+void analogix_dp_init_interrupt(struct analogix_dp_device *dp)
+{
+ /* Set interrupt pin assertion polarity as high */
+ writel(INT_POL1 | INT_POL0, dp->reg_base + ANALOGIX_DP_INT_CTL);
+
+ /* Clear pending regisers */
+ writel(0xff, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_1);
+ writel(0x4f, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_2);
+ writel(0xe0, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_3);
+ writel(0xe7, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_4);
+ writel(0x63, dp->reg_base + ANALOGIX_DP_INT_STA);
+
+ /* 0:mask,1: unmask */
+ writel(0x00, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_1);
+ writel(0x00, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_2);
+ writel(0x00, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_3);
+ writel(0x00, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_4);
+ writel(0x00, dp->reg_base + ANALOGIX_DP_INT_STA_MASK);
+}
+
+void analogix_dp_reset(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ analogix_dp_stop_video(dp);
+ analogix_dp_enable_video_mute(dp, 0);
+
+ if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
+ reg = RK_VID_CAP_FUNC_EN_N | RK_VID_FIFO_FUNC_EN_N |
+ SW_FUNC_EN_N;
+ else
+ reg = MASTER_VID_FUNC_EN_N | SLAVE_VID_FUNC_EN_N |
+ AUD_FIFO_FUNC_EN_N | AUD_FUNC_EN_N |
+ HDCP_FUNC_EN_N | SW_FUNC_EN_N;
+
+ writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
+
+ reg = SSC_FUNC_EN_N | AUX_FUNC_EN_N |
+ SERDES_FIFO_FUNC_EN_N |
+ LS_CLK_DOMAIN_FUNC_EN_N;
+ writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+
+ usleep_range(20, 30);
+
+ analogix_dp_lane_swap(dp, 0);
+
+ writel(0x0, dp->reg_base + ANALOGIX_DP_SYS_CTL_1);
+ writel(0x40, dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
+ writel(0x0, dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+ writel(0x0, dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+
+ writel(0x0, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
+ writel(0x0, dp->reg_base + ANALOGIX_DP_HDCP_CTL);
+
+ writel(0x5e, dp->reg_base + ANALOGIX_DP_HPD_DEGLITCH_L);
+ writel(0x1a, dp->reg_base + ANALOGIX_DP_HPD_DEGLITCH_H);
+
+ writel(0x10, dp->reg_base + ANALOGIX_DP_LINK_DEBUG_CTL);
+
+ writel(0x0, dp->reg_base + ANALOGIX_DP_PHY_TEST);
+
+ writel(0x0, dp->reg_base + ANALOGIX_DP_VIDEO_FIFO_THRD);
+ writel(0x20, dp->reg_base + ANALOGIX_DP_AUDIO_MARGIN);
+
+ writel(0x4, dp->reg_base + ANALOGIX_DP_M_VID_GEN_FILTER_TH);
+ writel(0x2, dp->reg_base + ANALOGIX_DP_M_AUD_GEN_FILTER_TH);
+
+ writel(0x00000101, dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
+}
+
+void analogix_dp_swreset(struct analogix_dp_device *dp)
+{
+ writel(RESET_DP_TX, dp->reg_base + ANALOGIX_DP_TX_SW_RESET);
+}
+
+void analogix_dp_config_interrupt(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ /* 0: mask, 1: unmask */
+ reg = COMMON_INT_MASK_1;
+ writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_1);
+
+ reg = COMMON_INT_MASK_2;
+ writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_2);
+
+ reg = COMMON_INT_MASK_3;
+ writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_3);
+
+ reg = COMMON_INT_MASK_4;
+ writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_4);
+
+ reg = INT_STA_MASK;
+ writel(reg, dp->reg_base + ANALOGIX_DP_INT_STA_MASK);
+}
+
+void analogix_dp_mute_hpd_interrupt(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ /* 0: mask, 1: unmask */
+ reg = readl(dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_4);
+ reg &= ~COMMON_INT_MASK_4;
+ writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_4);
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_INT_STA_MASK);
+ reg &= ~INT_STA_MASK;
+ writel(reg, dp->reg_base + ANALOGIX_DP_INT_STA_MASK);
+}
+
+void analogix_dp_unmute_hpd_interrupt(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ /* 0: mask, 1: unmask */
+ reg = COMMON_INT_MASK_4;
+ writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_4);
+
+ reg = INT_STA_MASK;
+ writel(reg, dp->reg_base + ANALOGIX_DP_INT_STA_MASK);
+}
+
+enum pll_status analogix_dp_get_pll_lock_status(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_DEBUG_CTL);
+ if (reg & PLL_LOCK)
+ return PLL_LOCKED;
+ else
+ return PLL_UNLOCKED;
+}
+
+void analogix_dp_set_pll_power_down(struct analogix_dp_device *dp, bool enable)
+{
+ u32 reg;
+ u32 mask = DP_PLL_PD;
+ u32 pd_addr = ANALOGIX_DP_PLL_CTL;
+
+ if (dp->plat_data && is_rockchip(dp->plat_data->dev_type)) {
+ pd_addr = ANALOGIX_DP_PD;
+ mask = RK_PLL_PD;
+ }
+
+ reg = readl(dp->reg_base + pd_addr);
+ if (enable)
+ reg |= mask;
+ else
+ reg &= ~mask;
+ writel(reg, dp->reg_base + pd_addr);
+}
+
+void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp,
+ enum analog_power_block block,
+ bool enable)
+{
+ u32 reg;
+ u32 phy_pd_addr = ANALOGIX_DP_PHY_PD;
+ u32 mask;
+
+ if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
+ phy_pd_addr = ANALOGIX_DP_PD;
+
+ switch (block) {
+ case AUX_BLOCK:
+ if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
+ mask = RK_AUX_PD;
+ else
+ mask = AUX_PD;
+
+ reg = readl(dp->reg_base + phy_pd_addr);
+ if (enable)
+ reg |= mask;
+ else
+ reg &= ~mask;
+ writel(reg, dp->reg_base + phy_pd_addr);
+ break;
+ case CH0_BLOCK:
+ mask = CH0_PD;
+ reg = readl(dp->reg_base + phy_pd_addr);
+
+ if (enable)
+ reg |= mask;
+ else
+ reg &= ~mask;
+ writel(reg, dp->reg_base + phy_pd_addr);
+ break;
+ case CH1_BLOCK:
+ mask = CH1_PD;
+ reg = readl(dp->reg_base + phy_pd_addr);
+
+ if (enable)
+ reg |= mask;
+ else
+ reg &= ~mask;
+ writel(reg, dp->reg_base + phy_pd_addr);
+ break;
+ case CH2_BLOCK:
+ mask = CH2_PD;
+ reg = readl(dp->reg_base + phy_pd_addr);
+
+ if (enable)
+ reg |= mask;
+ else
+ reg &= ~mask;
+ writel(reg, dp->reg_base + phy_pd_addr);
+ break;
+ case CH3_BLOCK:
+ mask = CH3_PD;
+ reg = readl(dp->reg_base + phy_pd_addr);
+
+ if (enable)
+ reg |= mask;
+ else
+ reg &= ~mask;
+ writel(reg, dp->reg_base + phy_pd_addr);
+ break;
+ case ANALOG_TOTAL:
+ /*
+ * There is no bit named DP_PHY_PD, so We used DP_INC_BG
+ * to power off everything instead of DP_PHY_PD in
+ * Rockchip
+ */
+ if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
+ mask = DP_INC_BG;
+ else
+ mask = DP_PHY_PD;
+
+ reg = readl(dp->reg_base + phy_pd_addr);
+ if (enable)
+ reg |= mask;
+ else
+ reg &= ~mask;
+
+ writel(reg, dp->reg_base + phy_pd_addr);
+ if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
+ usleep_range(10, 15);
+ break;
+ case POWER_ALL:
+ if (enable) {
+ reg = DP_ALL_PD;
+ writel(reg, dp->reg_base + phy_pd_addr);
+ } else {
+ reg = DP_ALL_PD;
+ writel(reg, dp->reg_base + phy_pd_addr);
+ usleep_range(10, 15);
+ reg &= ~DP_INC_BG;
+ writel(reg, dp->reg_base + phy_pd_addr);
+ usleep_range(10, 15);
+
+ writel(0x00, dp->reg_base + phy_pd_addr);
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+int analogix_dp_init_analog_func(struct analogix_dp_device *dp)
+{
+ u32 reg;
+ int timeout_loop = 0;
+
+ analogix_dp_set_analog_power_down(dp, POWER_ALL, 0);
+
+ reg = PLL_LOCK_CHG;
+ writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_1);
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_DEBUG_CTL);
+ reg &= ~(F_PLL_LOCK | PLL_LOCK_CTRL);
+ writel(reg, dp->reg_base + ANALOGIX_DP_DEBUG_CTL);
+
+ /* Power up PLL */
+ if (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
+ analogix_dp_set_pll_power_down(dp, 0);
+
+ while (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
+ timeout_loop++;
+ if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) {
+ dev_err(dp->dev, "failed to get pll lock status\n");
+ return -ETIMEDOUT;
+ }
+ usleep_range(10, 20);
+ }
+ }
+
+ /* Enable Serdes FIFO function and Link symbol clock domain module */
+ reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+ reg &= ~(SERDES_FIFO_FUNC_EN_N | LS_CLK_DOMAIN_FUNC_EN_N
+ | AUX_FUNC_EN_N);
+ writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+ return 0;
+}
+
+void analogix_dp_clear_hotplug_interrupts(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ if (dp->hpd_gpiod)
+ return;
+
+ reg = HOTPLUG_CHG | HPD_LOST | PLUG;
+ writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_4);
+
+ reg = INT_HPD;
+ writel(reg, dp->reg_base + ANALOGIX_DP_INT_STA);
+}
+
+void analogix_dp_init_hpd(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ if (dp->hpd_gpiod)
+ return;
+
+ analogix_dp_clear_hotplug_interrupts(dp);
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+ reg &= ~(F_HPD | HPD_CTRL);
+ writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+}
+
+void analogix_dp_force_hpd(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+ reg = (F_HPD | HPD_CTRL);
+ writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+}
+
+enum dp_irq_type analogix_dp_get_irq_type(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ if (dp->hpd_gpiod) {
+ reg = gpiod_get_value(dp->hpd_gpiod);
+ if (reg)
+ return DP_IRQ_TYPE_HP_CABLE_IN;
+ else
+ return DP_IRQ_TYPE_HP_CABLE_OUT;
+ } else {
+ /* Parse hotplug interrupt status register */
+ reg = readl(dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_4);
+
+ if (reg & PLUG)
+ return DP_IRQ_TYPE_HP_CABLE_IN;
+
+ if (reg & HPD_LOST)
+ return DP_IRQ_TYPE_HP_CABLE_OUT;
+
+ if (reg & HOTPLUG_CHG)
+ return DP_IRQ_TYPE_HP_CHANGE;
+
+ return DP_IRQ_TYPE_UNKNOWN;
+ }
+}
+
+void analogix_dp_reset_aux(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ /* Disable AUX channel module */
+ reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+ reg |= AUX_FUNC_EN_N;
+ writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+}
+
+void analogix_dp_init_aux(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ /* Clear inerrupts related to AUX channel */
+ reg = RPLY_RECEIV | AUX_ERR;
+ writel(reg, dp->reg_base + ANALOGIX_DP_INT_STA);
+
+ analogix_dp_set_analog_power_down(dp, AUX_BLOCK, true);
+ usleep_range(10, 11);
+ analogix_dp_set_analog_power_down(dp, AUX_BLOCK, false);
+
+ analogix_dp_reset_aux(dp);
+
+ /* AUX_BIT_PERIOD_EXPECTED_DELAY doesn't apply to Rockchip IP */
+ if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
+ reg = 0;
+ else
+ reg = AUX_BIT_PERIOD_EXPECTED_DELAY(3);
+
+ /* Disable AUX transaction H/W retry */
+ reg |= AUX_HW_RETRY_COUNT_SEL(0) |
+ AUX_HW_RETRY_INTERVAL_600_MICROSECONDS;
+
+ writel(reg, dp->reg_base + ANALOGIX_DP_AUX_HW_RETRY_CTL);
+
+ /* Receive AUX Channel DEFER commands equal to DEFFER_COUNT*64 */
+ reg = DEFER_CTRL_EN | DEFER_COUNT(1);
+ writel(reg, dp->reg_base + ANALOGIX_DP_AUX_CH_DEFER_CTL);
+
+ /* Enable AUX channel module */
+ reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+ reg &= ~AUX_FUNC_EN_N;
+ writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
+}
+
+int analogix_dp_get_plug_in_status(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ if (dp->hpd_gpiod) {
+ if (gpiod_get_value(dp->hpd_gpiod))
+ return 0;
+ } else {
+ reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+ if (reg & HPD_STATUS)
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+void analogix_dp_enable_sw_function(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
+ reg &= ~SW_FUNC_EN_N;
+ writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
+}
+
+void analogix_dp_set_link_bandwidth(struct analogix_dp_device *dp, u32 bwtype)
+{
+ u32 reg;
+
+ reg = bwtype;
+ if ((bwtype == DP_LINK_BW_2_7) || (bwtype == DP_LINK_BW_1_62))
+ writel(reg, dp->reg_base + ANALOGIX_DP_LINK_BW_SET);
+}
+
+void analogix_dp_get_link_bandwidth(struct analogix_dp_device *dp, u32 *bwtype)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_LINK_BW_SET);
+ *bwtype = reg;
+}
+
+void analogix_dp_set_lane_count(struct analogix_dp_device *dp, u32 count)
+{
+ u32 reg;
+
+ reg = count;
+ writel(reg, dp->reg_base + ANALOGIX_DP_LANE_COUNT_SET);
+}
+
+void analogix_dp_get_lane_count(struct analogix_dp_device *dp, u32 *count)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_LANE_COUNT_SET);
+ *count = reg;
+}
+
+void analogix_dp_enable_enhanced_mode(struct analogix_dp_device *dp,
+ bool enable)
+{
+ u32 reg;
+
+ if (enable) {
+ reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+ reg |= ENHANCED;
+ writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+ } else {
+ reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+ reg &= ~ENHANCED;
+ writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+ }
+}
+
+void analogix_dp_set_training_pattern(struct analogix_dp_device *dp,
+ enum pattern_set pattern)
+{
+ u32 reg;
+
+ switch (pattern) {
+ case PRBS7:
+ reg = SCRAMBLING_ENABLE | LINK_QUAL_PATTERN_SET_PRBS7;
+ writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+ break;
+ case D10_2:
+ reg = SCRAMBLING_ENABLE | LINK_QUAL_PATTERN_SET_D10_2;
+ writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+ break;
+ case TRAINING_PTN1:
+ reg = SCRAMBLING_DISABLE | SW_TRAINING_PATTERN_SET_PTN1;
+ writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+ break;
+ case TRAINING_PTN2:
+ reg = SCRAMBLING_DISABLE | SW_TRAINING_PATTERN_SET_PTN2;
+ writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+ break;
+ case DP_NONE:
+ reg = SCRAMBLING_ENABLE |
+ LINK_QUAL_PATTERN_SET_DISABLE |
+ SW_TRAINING_PATTERN_SET_NORMAL;
+ writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+ break;
+ default:
+ break;
+ }
+}
+
+void analogix_dp_set_lane0_pre_emphasis(struct analogix_dp_device *dp,
+ u32 level)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_LN0_LINK_TRAINING_CTL);
+ reg &= ~PRE_EMPHASIS_SET_MASK;
+ reg |= level << PRE_EMPHASIS_SET_SHIFT;
+ writel(reg, dp->reg_base + ANALOGIX_DP_LN0_LINK_TRAINING_CTL);
+}
+
+void analogix_dp_set_lane1_pre_emphasis(struct analogix_dp_device *dp,
+ u32 level)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_LN1_LINK_TRAINING_CTL);
+ reg &= ~PRE_EMPHASIS_SET_MASK;
+ reg |= level << PRE_EMPHASIS_SET_SHIFT;
+ writel(reg, dp->reg_base + ANALOGIX_DP_LN1_LINK_TRAINING_CTL);
+}
+
+void analogix_dp_set_lane2_pre_emphasis(struct analogix_dp_device *dp,
+ u32 level)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_LN2_LINK_TRAINING_CTL);
+ reg &= ~PRE_EMPHASIS_SET_MASK;
+ reg |= level << PRE_EMPHASIS_SET_SHIFT;
+ writel(reg, dp->reg_base + ANALOGIX_DP_LN2_LINK_TRAINING_CTL);
+}
+
+void analogix_dp_set_lane3_pre_emphasis(struct analogix_dp_device *dp,
+ u32 level)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_LN3_LINK_TRAINING_CTL);
+ reg &= ~PRE_EMPHASIS_SET_MASK;
+ reg |= level << PRE_EMPHASIS_SET_SHIFT;
+ writel(reg, dp->reg_base + ANALOGIX_DP_LN3_LINK_TRAINING_CTL);
+}
+
+void analogix_dp_set_lane0_link_training(struct analogix_dp_device *dp,
+ u32 training_lane)
+{
+ u32 reg;
+
+ reg = training_lane;
+ writel(reg, dp->reg_base + ANALOGIX_DP_LN0_LINK_TRAINING_CTL);
+}
+
+void analogix_dp_set_lane1_link_training(struct analogix_dp_device *dp,
+ u32 training_lane)
+{
+ u32 reg;
+
+ reg = training_lane;
+ writel(reg, dp->reg_base + ANALOGIX_DP_LN1_LINK_TRAINING_CTL);
+}
+
+void analogix_dp_set_lane2_link_training(struct analogix_dp_device *dp,
+ u32 training_lane)
+{
+ u32 reg;
+
+ reg = training_lane;
+ writel(reg, dp->reg_base + ANALOGIX_DP_LN2_LINK_TRAINING_CTL);
+}
+
+void analogix_dp_set_lane3_link_training(struct analogix_dp_device *dp,
+ u32 training_lane)
+{
+ u32 reg;
+
+ reg = training_lane;
+ writel(reg, dp->reg_base + ANALOGIX_DP_LN3_LINK_TRAINING_CTL);
+}
+
+u32 analogix_dp_get_lane0_link_training(struct analogix_dp_device *dp)
+{
+ return readl(dp->reg_base + ANALOGIX_DP_LN0_LINK_TRAINING_CTL);
+}
+
+u32 analogix_dp_get_lane1_link_training(struct analogix_dp_device *dp)
+{
+ return readl(dp->reg_base + ANALOGIX_DP_LN1_LINK_TRAINING_CTL);
+}
+
+u32 analogix_dp_get_lane2_link_training(struct analogix_dp_device *dp)
+{
+ return readl(dp->reg_base + ANALOGIX_DP_LN2_LINK_TRAINING_CTL);
+}
+
+u32 analogix_dp_get_lane3_link_training(struct analogix_dp_device *dp)
+{
+ return readl(dp->reg_base + ANALOGIX_DP_LN3_LINK_TRAINING_CTL);
+}
+
+void analogix_dp_reset_macro(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_PHY_TEST);
+ reg |= MACRO_RST;
+ writel(reg, dp->reg_base + ANALOGIX_DP_PHY_TEST);
+
+ /* 10 us is the minimum reset time. */
+ usleep_range(10, 20);
+
+ reg &= ~MACRO_RST;
+ writel(reg, dp->reg_base + ANALOGIX_DP_PHY_TEST);
+}
+
+void analogix_dp_init_video(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ reg = VSYNC_DET | VID_FORMAT_CHG | VID_CLK_CHG;
+ writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_1);
+
+ reg = 0x0;
+ writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_1);
+
+ reg = CHA_CRI(4) | CHA_CTRL;
+ writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
+
+ reg = 0x0;
+ writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+
+ reg = VID_HRES_TH(2) | VID_VRES_TH(0);
+ writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_8);
+}
+
+void analogix_dp_set_video_color_format(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ /* Configure the input color depth, color space, dynamic range */
+ reg = (dp->video_info.dynamic_range << IN_D_RANGE_SHIFT) |
+ (dp->video_info.color_depth << IN_BPC_SHIFT) |
+ (dp->video_info.color_space << IN_COLOR_F_SHIFT);
+ writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_2);
+
+ /* Set Input Color YCbCr Coefficients to ITU601 or ITU709 */
+ reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_3);
+ reg &= ~IN_YC_COEFFI_MASK;
+ if (dp->video_info.ycbcr_coeff)
+ reg |= IN_YC_COEFFI_ITU709;
+ else
+ reg |= IN_YC_COEFFI_ITU601;
+ writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_3);
+}
+
+int analogix_dp_is_slave_video_stream_clock_on(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_1);
+ writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_1);
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_1);
+
+ if (!(reg & DET_STA)) {
+ dev_dbg(dp->dev, "Input stream clock not detected.\n");
+ return -EINVAL;
+ }
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
+ writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
+ dev_dbg(dp->dev, "wait SYS_CTL_2.\n");
+
+ if (reg & CHA_STA) {
+ dev_dbg(dp->dev, "Input stream clk is changing\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+void analogix_dp_set_video_cr_mn(struct analogix_dp_device *dp,
+ enum clock_recovery_m_value_type type,
+ u32 m_value, u32 n_value)
+{
+ u32 reg;
+
+ if (type == REGISTER_M) {
+ reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+ reg |= FIX_M_VID;
+ writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+ reg = m_value & 0xff;
+ writel(reg, dp->reg_base + ANALOGIX_DP_M_VID_0);
+ reg = (m_value >> 8) & 0xff;
+ writel(reg, dp->reg_base + ANALOGIX_DP_M_VID_1);
+ reg = (m_value >> 16) & 0xff;
+ writel(reg, dp->reg_base + ANALOGIX_DP_M_VID_2);
+
+ reg = n_value & 0xff;
+ writel(reg, dp->reg_base + ANALOGIX_DP_N_VID_0);
+ reg = (n_value >> 8) & 0xff;
+ writel(reg, dp->reg_base + ANALOGIX_DP_N_VID_1);
+ reg = (n_value >> 16) & 0xff;
+ writel(reg, dp->reg_base + ANALOGIX_DP_N_VID_2);
+ } else {
+ reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+ reg &= ~FIX_M_VID;
+ writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
+
+ writel(0x00, dp->reg_base + ANALOGIX_DP_N_VID_0);
+ writel(0x80, dp->reg_base + ANALOGIX_DP_N_VID_1);
+ writel(0x00, dp->reg_base + ANALOGIX_DP_N_VID_2);
+ }
+}
+
+void analogix_dp_set_video_timing_mode(struct analogix_dp_device *dp, u32 type)
+{
+ u32 reg;
+
+ if (type == VIDEO_TIMING_FROM_CAPTURE) {
+ reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+ reg &= ~FORMAT_SEL;
+ writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+ } else {
+ reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+ reg |= FORMAT_SEL;
+ writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+ }
+}
+
+void analogix_dp_enable_video_master(struct analogix_dp_device *dp, bool enable)
+{
+ u32 reg;
+
+ if (enable) {
+ reg = readl(dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
+ reg &= ~VIDEO_MODE_MASK;
+ reg |= VIDEO_MASTER_MODE_EN | VIDEO_MODE_MASTER_MODE;
+ writel(reg, dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
+ } else {
+ reg = readl(dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
+ reg &= ~VIDEO_MODE_MASK;
+ reg |= VIDEO_MODE_SLAVE_MODE;
+ writel(reg, dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
+ }
+}
+
+void analogix_dp_start_video(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
+ reg |= VIDEO_EN;
+ writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
+}
+
+int analogix_dp_is_video_stream_on(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+ writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
+ if (!(reg & STRM_VALID)) {
+ dev_dbg(dp->dev, "Input video stream is not detected.\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+void analogix_dp_config_video_slave_mode(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
+ if (dp->plat_data && is_rockchip(dp->plat_data->dev_type)) {
+ reg &= ~(RK_VID_CAP_FUNC_EN_N | RK_VID_FIFO_FUNC_EN_N);
+ } else {
+ reg &= ~(MASTER_VID_FUNC_EN_N | SLAVE_VID_FUNC_EN_N);
+ reg |= MASTER_VID_FUNC_EN_N;
+ }
+ writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+ reg &= ~INTERACE_SCAN_CFG;
+ reg |= (dp->video_info.interlaced << 2);
+ writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+ reg &= ~VSYNC_POLARITY_CFG;
+ reg |= (dp->video_info.v_sync_polarity << 1);
+ writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+ reg &= ~HSYNC_POLARITY_CFG;
+ reg |= (dp->video_info.h_sync_polarity << 0);
+ writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
+
+ reg = AUDIO_MODE_SPDIF_MODE | VIDEO_MODE_SLAVE_MODE;
+ writel(reg, dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
+}
+
+void analogix_dp_enable_scrambling(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+ reg &= ~SCRAMBLING_DISABLE;
+ writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+}
+
+void analogix_dp_disable_scrambling(struct analogix_dp_device *dp)
+{
+ u32 reg;
+
+ reg = readl(dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+ reg |= SCRAMBLING_DISABLE;
+ writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
+}
+
+void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp)
+{
+ writel(PSR_VID_CRC_ENABLE, dp->reg_base + ANALOGIX_DP_CRC_CON);
+}
+
+static ssize_t analogix_dp_get_psr_status(struct analogix_dp_device *dp)
+{
+ ssize_t val;
+ u8 status;
+
+ val = drm_dp_dpcd_readb(&dp->aux, DP_PSR_STATUS, &status);
+ if (val < 0) {
+ dev_err(dp->dev, "PSR_STATUS read failed ret=%zd", val);
+ return val;
+ }
+ return status;
+}
+
+int analogix_dp_send_psr_spd(struct analogix_dp_device *dp,
+ struct dp_sdp *vsc, bool blocking)
+{
+ unsigned int val;
+ int ret;
+ ssize_t psr_status;
+
+ /* don't send info frame */
+ val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
+ val &= ~IF_EN;
+ writel(val, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
+
+ /* configure single frame update mode */
+ writel(PSR_FRAME_UP_TYPE_BURST | PSR_CRC_SEL_HARDWARE,
+ dp->reg_base + ANALOGIX_DP_PSR_FRAME_UPDATE_CTRL);
+
+ /* configure VSC HB0~HB3 */
+ writel(vsc->sdp_header.HB0, dp->reg_base + ANALOGIX_DP_SPD_HB0);
+ writel(vsc->sdp_header.HB1, dp->reg_base + ANALOGIX_DP_SPD_HB1);
+ writel(vsc->sdp_header.HB2, dp->reg_base + ANALOGIX_DP_SPD_HB2);
+ writel(vsc->sdp_header.HB3, dp->reg_base + ANALOGIX_DP_SPD_HB3);
+
+ /* configure reused VSC PB0~PB3, magic number from vendor */
+ writel(0x00, dp->reg_base + ANALOGIX_DP_SPD_PB0);
+ writel(0x16, dp->reg_base + ANALOGIX_DP_SPD_PB1);
+ writel(0xCE, dp->reg_base + ANALOGIX_DP_SPD_PB2);
+ writel(0x5D, dp->reg_base + ANALOGIX_DP_SPD_PB3);
+
+ /* configure DB0 / DB1 values */
+ writel(vsc->db[0], dp->reg_base + ANALOGIX_DP_VSC_SHADOW_DB0);
+ writel(vsc->db[1], dp->reg_base + ANALOGIX_DP_VSC_SHADOW_DB1);
+
+ /* set reuse spd inforframe */
+ val = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_3);
+ val |= REUSE_SPD_EN;
+ writel(val, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_3);
+
+ /* mark info frame update */
+ val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
+ val = (val | IF_UP) & ~IF_EN;
+ writel(val, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
+
+ /* send info frame */
+ val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
+ val |= IF_EN;
+ writel(val, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
+
+ if (!blocking)
+ return 0;
+
+ /*
+ * db[1]!=0: entering PSR, wait for fully active remote frame buffer.
+ * db[1]==0: exiting PSR, wait for either
+ * (a) ACTIVE_RESYNC - the sink "must display the
+ * incoming active frames from the Source device with no visible
+ * glitches and/or artifacts", even though timings may still be
+ * re-synchronizing; or
+ * (b) INACTIVE - the transition is fully complete.
+ */
+ ret = readx_poll_timeout(analogix_dp_get_psr_status, dp, psr_status,
+ psr_status >= 0 &&
+ ((vsc->db[1] && psr_status == DP_PSR_SINK_ACTIVE_RFB) ||
+ (!vsc->db[1] && (psr_status == DP_PSR_SINK_ACTIVE_RESYNC ||
+ psr_status == DP_PSR_SINK_INACTIVE))),
+ 1500, DP_TIMEOUT_PSR_LOOP_MS * 1000);
+ if (ret) {
+ dev_warn(dp->dev, "Failed to apply PSR %d\n", ret);
+ return ret;
+ }
+ return 0;
+}
+
+ssize_t analogix_dp_transfer(struct analogix_dp_device *dp,
+ struct drm_dp_aux_msg *msg)
+{
+ u32 reg;
+ u32 status_reg;
+ u8 *buffer = msg->buffer;
+ unsigned int i;
+ int num_transferred = 0;
+ int ret;
+
+ /* Buffer size of AUX CH is 16 bytes */
+ if (WARN_ON(msg->size > 16))
+ return -E2BIG;
+
+ /* Clear AUX CH data buffer */
+ reg = BUF_CLR;
+ writel(reg, dp->reg_base + ANALOGIX_DP_BUFFER_DATA_CTL);
+
+ switch (msg->request & ~DP_AUX_I2C_MOT) {
+ case DP_AUX_I2C_WRITE:
+ reg = AUX_TX_COMM_WRITE | AUX_TX_COMM_I2C_TRANSACTION;
+ if (msg->request & DP_AUX_I2C_MOT)
+ reg |= AUX_TX_COMM_MOT;
+ break;
+
+ case DP_AUX_I2C_READ:
+ reg = AUX_TX_COMM_READ | AUX_TX_COMM_I2C_TRANSACTION;
+ if (msg->request & DP_AUX_I2C_MOT)
+ reg |= AUX_TX_COMM_MOT;
+ break;
+
+ case DP_AUX_NATIVE_WRITE:
+ reg = AUX_TX_COMM_WRITE | AUX_TX_COMM_DP_TRANSACTION;
+ break;
+
+ case DP_AUX_NATIVE_READ:
+ reg = AUX_TX_COMM_READ | AUX_TX_COMM_DP_TRANSACTION;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ reg |= AUX_LENGTH(msg->size);
+ writel(reg, dp->reg_base + ANALOGIX_DP_AUX_CH_CTL_1);
+
+ /* Select DPCD device address */
+ reg = AUX_ADDR_7_0(msg->address);
+ writel(reg, dp->reg_base + ANALOGIX_DP_AUX_ADDR_7_0);
+ reg = AUX_ADDR_15_8(msg->address);
+ writel(reg, dp->reg_base + ANALOGIX_DP_AUX_ADDR_15_8);
+ reg = AUX_ADDR_19_16(msg->address);
+ writel(reg, dp->reg_base + ANALOGIX_DP_AUX_ADDR_19_16);
+
+ if (!(msg->request & DP_AUX_I2C_READ)) {
+ for (i = 0; i < msg->size; i++) {
+ reg = buffer[i];
+ writel(reg, dp->reg_base + ANALOGIX_DP_BUF_DATA_0 +
+ 4 * i);
+ num_transferred++;
+ }
+ }
+
+ /* Enable AUX CH operation */
+ reg = AUX_EN;
+
+ /* Zero-sized messages specify address-only transactions. */
+ if (msg->size < 1)
+ reg |= ADDR_ONLY;
+
+ writel(reg, dp->reg_base + ANALOGIX_DP_AUX_CH_CTL_2);
+
+ ret = readx_poll_timeout(readl, dp->reg_base + ANALOGIX_DP_AUX_CH_CTL_2,
+ reg, !(reg & AUX_EN), 25, 500 * 1000);
+ if (ret) {
+ dev_err(dp->dev, "AUX CH enable timeout!\n");
+ goto aux_error;
+ }
+
+ /* TODO: Wait for an interrupt instead of looping? */
+ /* Is AUX CH command reply received? */
+ ret = readx_poll_timeout(readl, dp->reg_base + ANALOGIX_DP_INT_STA,
+ reg, reg & RPLY_RECEIV, 10, 20 * 1000);
+ if (ret) {
+ dev_err(dp->dev, "AUX CH cmd reply timeout!\n");
+ goto aux_error;
+ }
+
+ /* Clear interrupt source for AUX CH command reply */
+ writel(RPLY_RECEIV, dp->reg_base + ANALOGIX_DP_INT_STA);
+
+ /* Clear interrupt source for AUX CH access error */
+ reg = readl(dp->reg_base + ANALOGIX_DP_INT_STA);
+ status_reg = readl(dp->reg_base + ANALOGIX_DP_AUX_CH_STA);
+ if ((reg & AUX_ERR) || (status_reg & AUX_STATUS_MASK)) {
+ writel(AUX_ERR, dp->reg_base + ANALOGIX_DP_INT_STA);
+
+ dev_warn(dp->dev, "AUX CH error happened: %#x (%d)\n",
+ status_reg & AUX_STATUS_MASK, !!(reg & AUX_ERR));
+ goto aux_error;
+ }
+
+ if (msg->request & DP_AUX_I2C_READ) {
+ for (i = 0; i < msg->size; i++) {
+ reg = readl(dp->reg_base + ANALOGIX_DP_BUF_DATA_0 +
+ 4 * i);
+ buffer[i] = (unsigned char)reg;
+ num_transferred++;
+ }
+ }
+
+ /* Check if Rx sends defer */
+ reg = readl(dp->reg_base + ANALOGIX_DP_AUX_RX_COMM);
+ if (reg == AUX_RX_COMM_AUX_DEFER)
+ msg->reply = DP_AUX_NATIVE_REPLY_DEFER;
+ else if (reg == AUX_RX_COMM_I2C_DEFER)
+ msg->reply = DP_AUX_I2C_REPLY_DEFER;
+ else if ((msg->request & ~DP_AUX_I2C_MOT) == DP_AUX_I2C_WRITE ||
+ (msg->request & ~DP_AUX_I2C_MOT) == DP_AUX_I2C_READ)
+ msg->reply = DP_AUX_I2C_REPLY_ACK;
+ else if ((msg->request & ~DP_AUX_I2C_MOT) == DP_AUX_NATIVE_WRITE ||
+ (msg->request & ~DP_AUX_I2C_MOT) == DP_AUX_NATIVE_READ)
+ msg->reply = DP_AUX_NATIVE_REPLY_ACK;
+
+ return num_transferred > 0 ? num_transferred : -EBUSY;
+
+aux_error:
+ /* if aux err happen, reset aux */
+ analogix_dp_init_aux(dp);
+
+ return -EREMOTEIO;
+}
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h
new file mode 100644
index 000000000..e284ee8da
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h
@@ -0,0 +1,417 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Register definition file for Analogix DP core driver
+ *
+ * Copyright (C) 2012 Samsung Electronics Co., Ltd.
+ * Author: Jingoo Han <jg1.han@samsung.com>
+ */
+
+#ifndef _ANALOGIX_DP_REG_H
+#define _ANALOGIX_DP_REG_H
+
+#define ANALOGIX_DP_TX_SW_RESET 0x14
+#define ANALOGIX_DP_FUNC_EN_1 0x18
+#define ANALOGIX_DP_FUNC_EN_2 0x1C
+#define ANALOGIX_DP_VIDEO_CTL_1 0x20
+#define ANALOGIX_DP_VIDEO_CTL_2 0x24
+#define ANALOGIX_DP_VIDEO_CTL_3 0x28
+
+#define ANALOGIX_DP_VIDEO_CTL_8 0x3C
+#define ANALOGIX_DP_VIDEO_CTL_10 0x44
+
+#define ANALOGIX_DP_SPDIF_AUDIO_CTL_0 0xD8
+
+#define ANALOGIX_DP_PLL_REG_1 0xfc
+#define ANALOGIX_DP_PLL_REG_2 0x9e4
+#define ANALOGIX_DP_PLL_REG_3 0x9e8
+#define ANALOGIX_DP_PLL_REG_4 0x9ec
+#define ANALOGIX_DP_PLL_REG_5 0xa00
+
+#define ANALOGIX_DP_PD 0x12c
+
+#define ANALOGIX_DP_IF_TYPE 0x244
+#define ANALOGIX_DP_IF_PKT_DB1 0x254
+#define ANALOGIX_DP_IF_PKT_DB2 0x258
+#define ANALOGIX_DP_SPD_HB0 0x2F8
+#define ANALOGIX_DP_SPD_HB1 0x2FC
+#define ANALOGIX_DP_SPD_HB2 0x300
+#define ANALOGIX_DP_SPD_HB3 0x304
+#define ANALOGIX_DP_SPD_PB0 0x308
+#define ANALOGIX_DP_SPD_PB1 0x30C
+#define ANALOGIX_DP_SPD_PB2 0x310
+#define ANALOGIX_DP_SPD_PB3 0x314
+#define ANALOGIX_DP_PSR_FRAME_UPDATE_CTRL 0x318
+#define ANALOGIX_DP_VSC_SHADOW_DB0 0x31C
+#define ANALOGIX_DP_VSC_SHADOW_DB1 0x320
+
+#define ANALOGIX_DP_LANE_MAP 0x35C
+
+#define ANALOGIX_DP_ANALOG_CTL_1 0x370
+#define ANALOGIX_DP_ANALOG_CTL_2 0x374
+#define ANALOGIX_DP_ANALOG_CTL_3 0x378
+#define ANALOGIX_DP_PLL_FILTER_CTL_1 0x37C
+#define ANALOGIX_DP_TX_AMP_TUNING_CTL 0x380
+
+#define ANALOGIX_DP_AUX_HW_RETRY_CTL 0x390
+
+#define ANALOGIX_DP_COMMON_INT_STA_1 0x3C4
+#define ANALOGIX_DP_COMMON_INT_STA_2 0x3C8
+#define ANALOGIX_DP_COMMON_INT_STA_3 0x3CC
+#define ANALOGIX_DP_COMMON_INT_STA_4 0x3D0
+#define ANALOGIX_DP_INT_STA 0x3DC
+#define ANALOGIX_DP_COMMON_INT_MASK_1 0x3E0
+#define ANALOGIX_DP_COMMON_INT_MASK_2 0x3E4
+#define ANALOGIX_DP_COMMON_INT_MASK_3 0x3E8
+#define ANALOGIX_DP_COMMON_INT_MASK_4 0x3EC
+#define ANALOGIX_DP_INT_STA_MASK 0x3F8
+#define ANALOGIX_DP_INT_CTL 0x3FC
+
+#define ANALOGIX_DP_SYS_CTL_1 0x600
+#define ANALOGIX_DP_SYS_CTL_2 0x604
+#define ANALOGIX_DP_SYS_CTL_3 0x608
+#define ANALOGIX_DP_SYS_CTL_4 0x60C
+
+#define ANALOGIX_DP_PKT_SEND_CTL 0x640
+#define ANALOGIX_DP_HDCP_CTL 0x648
+
+#define ANALOGIX_DP_LINK_BW_SET 0x680
+#define ANALOGIX_DP_LANE_COUNT_SET 0x684
+#define ANALOGIX_DP_TRAINING_PTN_SET 0x688
+#define ANALOGIX_DP_LN0_LINK_TRAINING_CTL 0x68C
+#define ANALOGIX_DP_LN1_LINK_TRAINING_CTL 0x690
+#define ANALOGIX_DP_LN2_LINK_TRAINING_CTL 0x694
+#define ANALOGIX_DP_LN3_LINK_TRAINING_CTL 0x698
+
+#define ANALOGIX_DP_DEBUG_CTL 0x6C0
+#define ANALOGIX_DP_HPD_DEGLITCH_L 0x6C4
+#define ANALOGIX_DP_HPD_DEGLITCH_H 0x6C8
+#define ANALOGIX_DP_LINK_DEBUG_CTL 0x6E0
+
+#define ANALOGIX_DP_M_VID_0 0x700
+#define ANALOGIX_DP_M_VID_1 0x704
+#define ANALOGIX_DP_M_VID_2 0x708
+#define ANALOGIX_DP_N_VID_0 0x70C
+#define ANALOGIX_DP_N_VID_1 0x710
+#define ANALOGIX_DP_N_VID_2 0x714
+
+#define ANALOGIX_DP_PLL_CTL 0x71C
+#define ANALOGIX_DP_PHY_PD 0x720
+#define ANALOGIX_DP_PHY_TEST 0x724
+
+#define ANALOGIX_DP_VIDEO_FIFO_THRD 0x730
+#define ANALOGIX_DP_AUDIO_MARGIN 0x73C
+
+#define ANALOGIX_DP_M_VID_GEN_FILTER_TH 0x764
+#define ANALOGIX_DP_M_AUD_GEN_FILTER_TH 0x778
+#define ANALOGIX_DP_AUX_CH_STA 0x780
+#define ANALOGIX_DP_AUX_CH_DEFER_CTL 0x788
+#define ANALOGIX_DP_AUX_RX_COMM 0x78C
+#define ANALOGIX_DP_BUFFER_DATA_CTL 0x790
+#define ANALOGIX_DP_AUX_CH_CTL_1 0x794
+#define ANALOGIX_DP_AUX_ADDR_7_0 0x798
+#define ANALOGIX_DP_AUX_ADDR_15_8 0x79C
+#define ANALOGIX_DP_AUX_ADDR_19_16 0x7A0
+#define ANALOGIX_DP_AUX_CH_CTL_2 0x7A4
+
+#define ANALOGIX_DP_BUF_DATA_0 0x7C0
+
+#define ANALOGIX_DP_SOC_GENERAL_CTL 0x800
+
+#define ANALOGIX_DP_CRC_CON 0x890
+
+/* ANALOGIX_DP_TX_SW_RESET */
+#define RESET_DP_TX (0x1 << 0)
+
+/* ANALOGIX_DP_FUNC_EN_1 */
+#define MASTER_VID_FUNC_EN_N (0x1 << 7)
+#define RK_VID_CAP_FUNC_EN_N (0x1 << 6)
+#define SLAVE_VID_FUNC_EN_N (0x1 << 5)
+#define RK_VID_FIFO_FUNC_EN_N (0x1 << 5)
+#define AUD_FIFO_FUNC_EN_N (0x1 << 4)
+#define AUD_FUNC_EN_N (0x1 << 3)
+#define HDCP_FUNC_EN_N (0x1 << 2)
+#define CRC_FUNC_EN_N (0x1 << 1)
+#define SW_FUNC_EN_N (0x1 << 0)
+
+/* ANALOGIX_DP_FUNC_EN_2 */
+#define SSC_FUNC_EN_N (0x1 << 7)
+#define AUX_FUNC_EN_N (0x1 << 2)
+#define SERDES_FIFO_FUNC_EN_N (0x1 << 1)
+#define LS_CLK_DOMAIN_FUNC_EN_N (0x1 << 0)
+
+/* ANALOGIX_DP_VIDEO_CTL_1 */
+#define VIDEO_EN (0x1 << 7)
+#define HDCP_VIDEO_MUTE (0x1 << 6)
+
+/* ANALOGIX_DP_VIDEO_CTL_1 */
+#define IN_D_RANGE_MASK (0x1 << 7)
+#define IN_D_RANGE_SHIFT (7)
+#define IN_D_RANGE_CEA (0x1 << 7)
+#define IN_D_RANGE_VESA (0x0 << 7)
+#define IN_BPC_MASK (0x7 << 4)
+#define IN_BPC_SHIFT (4)
+#define IN_BPC_12_BITS (0x3 << 4)
+#define IN_BPC_10_BITS (0x2 << 4)
+#define IN_BPC_8_BITS (0x1 << 4)
+#define IN_BPC_6_BITS (0x0 << 4)
+#define IN_COLOR_F_MASK (0x3 << 0)
+#define IN_COLOR_F_SHIFT (0)
+#define IN_COLOR_F_YCBCR444 (0x2 << 0)
+#define IN_COLOR_F_YCBCR422 (0x1 << 0)
+#define IN_COLOR_F_RGB (0x0 << 0)
+
+/* ANALOGIX_DP_VIDEO_CTL_3 */
+#define IN_YC_COEFFI_MASK (0x1 << 7)
+#define IN_YC_COEFFI_SHIFT (7)
+#define IN_YC_COEFFI_ITU709 (0x1 << 7)
+#define IN_YC_COEFFI_ITU601 (0x0 << 7)
+#define VID_CHK_UPDATE_TYPE_MASK (0x1 << 4)
+#define VID_CHK_UPDATE_TYPE_SHIFT (4)
+#define VID_CHK_UPDATE_TYPE_1 (0x1 << 4)
+#define VID_CHK_UPDATE_TYPE_0 (0x0 << 4)
+#define REUSE_SPD_EN (0x1 << 3)
+
+/* ANALOGIX_DP_VIDEO_CTL_8 */
+#define VID_HRES_TH(x) (((x) & 0xf) << 4)
+#define VID_VRES_TH(x) (((x) & 0xf) << 0)
+
+/* ANALOGIX_DP_VIDEO_CTL_10 */
+#define FORMAT_SEL (0x1 << 4)
+#define INTERACE_SCAN_CFG (0x1 << 2)
+#define VSYNC_POLARITY_CFG (0x1 << 1)
+#define HSYNC_POLARITY_CFG (0x1 << 0)
+
+/* ANALOGIX_DP_PLL_REG_1 */
+#define REF_CLK_24M (0x1 << 0)
+#define REF_CLK_27M (0x0 << 0)
+#define REF_CLK_MASK (0x1 << 0)
+
+/* ANALOGIX_DP_PSR_FRAME_UPDATE_CTRL */
+#define PSR_FRAME_UP_TYPE_BURST (0x1 << 0)
+#define PSR_FRAME_UP_TYPE_SINGLE (0x0 << 0)
+#define PSR_CRC_SEL_HARDWARE (0x1 << 1)
+#define PSR_CRC_SEL_MANUALLY (0x0 << 1)
+
+/* ANALOGIX_DP_LANE_MAP */
+#define LANE3_MAP_LOGIC_LANE_0 (0x0 << 6)
+#define LANE3_MAP_LOGIC_LANE_1 (0x1 << 6)
+#define LANE3_MAP_LOGIC_LANE_2 (0x2 << 6)
+#define LANE3_MAP_LOGIC_LANE_3 (0x3 << 6)
+#define LANE2_MAP_LOGIC_LANE_0 (0x0 << 4)
+#define LANE2_MAP_LOGIC_LANE_1 (0x1 << 4)
+#define LANE2_MAP_LOGIC_LANE_2 (0x2 << 4)
+#define LANE2_MAP_LOGIC_LANE_3 (0x3 << 4)
+#define LANE1_MAP_LOGIC_LANE_0 (0x0 << 2)
+#define LANE1_MAP_LOGIC_LANE_1 (0x1 << 2)
+#define LANE1_MAP_LOGIC_LANE_2 (0x2 << 2)
+#define LANE1_MAP_LOGIC_LANE_3 (0x3 << 2)
+#define LANE0_MAP_LOGIC_LANE_0 (0x0 << 0)
+#define LANE0_MAP_LOGIC_LANE_1 (0x1 << 0)
+#define LANE0_MAP_LOGIC_LANE_2 (0x2 << 0)
+#define LANE0_MAP_LOGIC_LANE_3 (0x3 << 0)
+
+/* ANALOGIX_DP_ANALOG_CTL_1 */
+#define TX_TERMINAL_CTRL_50_OHM (0x1 << 4)
+
+/* ANALOGIX_DP_ANALOG_CTL_2 */
+#define SEL_24M (0x1 << 3)
+#define TX_DVDD_BIT_1_0625V (0x4 << 0)
+
+/* ANALOGIX_DP_ANALOG_CTL_3 */
+#define DRIVE_DVDD_BIT_1_0625V (0x4 << 5)
+#define VCO_BIT_600_MICRO (0x5 << 0)
+
+/* ANALOGIX_DP_PLL_FILTER_CTL_1 */
+#define PD_RING_OSC (0x1 << 6)
+#define AUX_TERMINAL_CTRL_50_OHM (0x2 << 4)
+#define TX_CUR1_2X (0x1 << 2)
+#define TX_CUR_16_MA (0x3 << 0)
+
+/* ANALOGIX_DP_TX_AMP_TUNING_CTL */
+#define CH3_AMP_400_MV (0x0 << 24)
+#define CH2_AMP_400_MV (0x0 << 16)
+#define CH1_AMP_400_MV (0x0 << 8)
+#define CH0_AMP_400_MV (0x0 << 0)
+
+/* ANALOGIX_DP_AUX_HW_RETRY_CTL */
+#define AUX_BIT_PERIOD_EXPECTED_DELAY(x) (((x) & 0x7) << 8)
+#define AUX_HW_RETRY_INTERVAL_MASK (0x3 << 3)
+#define AUX_HW_RETRY_INTERVAL_600_MICROSECONDS (0x0 << 3)
+#define AUX_HW_RETRY_INTERVAL_800_MICROSECONDS (0x1 << 3)
+#define AUX_HW_RETRY_INTERVAL_1000_MICROSECONDS (0x2 << 3)
+#define AUX_HW_RETRY_INTERVAL_1800_MICROSECONDS (0x3 << 3)
+#define AUX_HW_RETRY_COUNT_SEL(x) (((x) & 0x7) << 0)
+
+/* ANALOGIX_DP_COMMON_INT_STA_1 */
+#define VSYNC_DET (0x1 << 7)
+#define PLL_LOCK_CHG (0x1 << 6)
+#define SPDIF_ERR (0x1 << 5)
+#define SPDIF_UNSTBL (0x1 << 4)
+#define VID_FORMAT_CHG (0x1 << 3)
+#define AUD_CLK_CHG (0x1 << 2)
+#define VID_CLK_CHG (0x1 << 1)
+#define SW_INT (0x1 << 0)
+
+/* ANALOGIX_DP_COMMON_INT_STA_2 */
+#define ENC_EN_CHG (0x1 << 6)
+#define HW_BKSV_RDY (0x1 << 3)
+#define HW_SHA_DONE (0x1 << 2)
+#define HW_AUTH_STATE_CHG (0x1 << 1)
+#define HW_AUTH_DONE (0x1 << 0)
+
+/* ANALOGIX_DP_COMMON_INT_STA_3 */
+#define AFIFO_UNDER (0x1 << 7)
+#define AFIFO_OVER (0x1 << 6)
+#define R0_CHK_FLAG (0x1 << 5)
+
+/* ANALOGIX_DP_COMMON_INT_STA_4 */
+#define PSR_ACTIVE (0x1 << 7)
+#define PSR_INACTIVE (0x1 << 6)
+#define SPDIF_BI_PHASE_ERR (0x1 << 5)
+#define HOTPLUG_CHG (0x1 << 2)
+#define HPD_LOST (0x1 << 1)
+#define PLUG (0x1 << 0)
+
+/* ANALOGIX_DP_INT_STA */
+#define INT_HPD (0x1 << 6)
+#define HW_TRAINING_FINISH (0x1 << 5)
+#define RPLY_RECEIV (0x1 << 1)
+#define AUX_ERR (0x1 << 0)
+
+/* ANALOGIX_DP_INT_CTL */
+#define SOFT_INT_CTRL (0x1 << 2)
+#define INT_POL1 (0x1 << 1)
+#define INT_POL0 (0x1 << 0)
+
+/* ANALOGIX_DP_SYS_CTL_1 */
+#define DET_STA (0x1 << 2)
+#define FORCE_DET (0x1 << 1)
+#define DET_CTRL (0x1 << 0)
+
+/* ANALOGIX_DP_SYS_CTL_2 */
+#define CHA_CRI(x) (((x) & 0xf) << 4)
+#define CHA_STA (0x1 << 2)
+#define FORCE_CHA (0x1 << 1)
+#define CHA_CTRL (0x1 << 0)
+
+/* ANALOGIX_DP_SYS_CTL_3 */
+#define HPD_STATUS (0x1 << 6)
+#define F_HPD (0x1 << 5)
+#define HPD_CTRL (0x1 << 4)
+#define HDCP_RDY (0x1 << 3)
+#define STRM_VALID (0x1 << 2)
+#define F_VALID (0x1 << 1)
+#define VALID_CTRL (0x1 << 0)
+
+/* ANALOGIX_DP_SYS_CTL_4 */
+#define FIX_M_AUD (0x1 << 4)
+#define ENHANCED (0x1 << 3)
+#define FIX_M_VID (0x1 << 2)
+#define M_VID_UPDATE_CTRL (0x3 << 0)
+
+/* ANALOGIX_DP_TRAINING_PTN_SET */
+#define SCRAMBLER_TYPE (0x1 << 9)
+#define HW_LINK_TRAINING_PATTERN (0x1 << 8)
+#define SCRAMBLING_DISABLE (0x1 << 5)
+#define SCRAMBLING_ENABLE (0x0 << 5)
+#define LINK_QUAL_PATTERN_SET_MASK (0x3 << 2)
+#define LINK_QUAL_PATTERN_SET_PRBS7 (0x3 << 2)
+#define LINK_QUAL_PATTERN_SET_D10_2 (0x1 << 2)
+#define LINK_QUAL_PATTERN_SET_DISABLE (0x0 << 2)
+#define SW_TRAINING_PATTERN_SET_MASK (0x3 << 0)
+#define SW_TRAINING_PATTERN_SET_PTN2 (0x2 << 0)
+#define SW_TRAINING_PATTERN_SET_PTN1 (0x1 << 0)
+#define SW_TRAINING_PATTERN_SET_NORMAL (0x0 << 0)
+
+/* ANALOGIX_DP_LN0_LINK_TRAINING_CTL */
+#define PRE_EMPHASIS_SET_MASK (0x3 << 3)
+#define PRE_EMPHASIS_SET_SHIFT (3)
+
+/* ANALOGIX_DP_DEBUG_CTL */
+#define PLL_LOCK (0x1 << 4)
+#define F_PLL_LOCK (0x1 << 3)
+#define PLL_LOCK_CTRL (0x1 << 2)
+#define PN_INV (0x1 << 0)
+
+/* ANALOGIX_DP_PLL_CTL */
+#define DP_PLL_PD (0x1 << 7)
+#define DP_PLL_RESET (0x1 << 6)
+#define DP_PLL_LOOP_BIT_DEFAULT (0x1 << 4)
+#define DP_PLL_REF_BIT_1_1250V (0x5 << 0)
+#define DP_PLL_REF_BIT_1_2500V (0x7 << 0)
+
+/* ANALOGIX_DP_PHY_PD */
+#define DP_INC_BG (0x1 << 7)
+#define DP_EXP_BG (0x1 << 6)
+#define DP_PHY_PD (0x1 << 5)
+#define RK_AUX_PD (0x1 << 5)
+#define AUX_PD (0x1 << 4)
+#define RK_PLL_PD (0x1 << 4)
+#define CH3_PD (0x1 << 3)
+#define CH2_PD (0x1 << 2)
+#define CH1_PD (0x1 << 1)
+#define CH0_PD (0x1 << 0)
+#define DP_ALL_PD (0xff)
+
+/* ANALOGIX_DP_PHY_TEST */
+#define MACRO_RST (0x1 << 5)
+#define CH1_TEST (0x1 << 1)
+#define CH0_TEST (0x1 << 0)
+
+/* ANALOGIX_DP_AUX_CH_STA */
+#define AUX_BUSY (0x1 << 4)
+#define AUX_STATUS_MASK (0xf << 0)
+
+/* ANALOGIX_DP_AUX_CH_DEFER_CTL */
+#define DEFER_CTRL_EN (0x1 << 7)
+#define DEFER_COUNT(x) (((x) & 0x7f) << 0)
+
+/* ANALOGIX_DP_AUX_RX_COMM */
+#define AUX_RX_COMM_I2C_DEFER (0x2 << 2)
+#define AUX_RX_COMM_AUX_DEFER (0x2 << 0)
+
+/* ANALOGIX_DP_BUFFER_DATA_CTL */
+#define BUF_CLR (0x1 << 7)
+#define BUF_DATA_COUNT(x) (((x) & 0x1f) << 0)
+
+/* ANALOGIX_DP_AUX_CH_CTL_1 */
+#define AUX_LENGTH(x) (((x - 1) & 0xf) << 4)
+#define AUX_TX_COMM_MASK (0xf << 0)
+#define AUX_TX_COMM_DP_TRANSACTION (0x1 << 3)
+#define AUX_TX_COMM_I2C_TRANSACTION (0x0 << 3)
+#define AUX_TX_COMM_MOT (0x1 << 2)
+#define AUX_TX_COMM_WRITE (0x0 << 0)
+#define AUX_TX_COMM_READ (0x1 << 0)
+
+/* ANALOGIX_DP_AUX_ADDR_7_0 */
+#define AUX_ADDR_7_0(x) (((x) >> 0) & 0xff)
+
+/* ANALOGIX_DP_AUX_ADDR_15_8 */
+#define AUX_ADDR_15_8(x) (((x) >> 8) & 0xff)
+
+/* ANALOGIX_DP_AUX_ADDR_19_16 */
+#define AUX_ADDR_19_16(x) (((x) >> 16) & 0x0f)
+
+/* ANALOGIX_DP_AUX_CH_CTL_2 */
+#define ADDR_ONLY (0x1 << 1)
+#define AUX_EN (0x1 << 0)
+
+/* ANALOGIX_DP_SOC_GENERAL_CTL */
+#define AUDIO_MODE_SPDIF_MODE (0x1 << 8)
+#define AUDIO_MODE_MASTER_MODE (0x0 << 8)
+#define MASTER_VIDEO_INTERLACE_EN (0x1 << 4)
+#define VIDEO_MASTER_CLK_SEL (0x1 << 2)
+#define VIDEO_MASTER_MODE_EN (0x1 << 1)
+#define VIDEO_MODE_MASK (0x1 << 0)
+#define VIDEO_MODE_SLAVE_MODE (0x1 << 0)
+#define VIDEO_MODE_MASTER_MODE (0x0 << 0)
+
+/* ANALOGIX_DP_PKT_SEND_CTL */
+#define IF_UP (0x1 << 4)
+#define IF_EN (0x1 << 0)
+
+/* ANALOGIX_DP_CRC_CON */
+#define PSR_VID_CRC_FLUSH (0x1 << 2)
+#define PSR_VID_CRC_ENABLE (0x1 << 0)
+
+#endif /* _ANALOGIX_DP_REG_H */
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
new file mode 100644
index 000000000..5f8137e9c
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -0,0 +1,2822 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright(c) 2020, Analogix Semiconductor. All rights reserved.
+ *
+ */
+#include <linux/gcd.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/workqueue.h>
+
+#include <linux/of_gpio.h>
+#include <linux/of_graph.h>
+#include <linux/of_platform.h>
+
+#include <drm/display/drm_dp_aux_bus.h>
+#include <drm/display/drm_dp_helper.h>
+#include <drm/display/drm_hdcp_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include <media/v4l2-fwnode.h>
+#include <sound/hdmi-codec.h>
+#include <video/display_timing.h>
+
+#include "anx7625.h"
+
+/*
+ * There is a sync issue while access I2C register between AP(CPU) and
+ * internal firmware(OCM), to avoid the race condition, AP should access
+ * the reserved slave address before slave address occurs changes.
+ */
+static int i2c_access_workaround(struct anx7625_data *ctx,
+ struct i2c_client *client)
+{
+ u8 offset;
+ struct device *dev = &client->dev;
+ int ret;
+
+ if (client == ctx->last_client)
+ return 0;
+
+ ctx->last_client = client;
+
+ if (client == ctx->i2c.tcpc_client)
+ offset = RSVD_00_ADDR;
+ else if (client == ctx->i2c.tx_p0_client)
+ offset = RSVD_D1_ADDR;
+ else if (client == ctx->i2c.tx_p1_client)
+ offset = RSVD_60_ADDR;
+ else if (client == ctx->i2c.rx_p0_client)
+ offset = RSVD_39_ADDR;
+ else if (client == ctx->i2c.rx_p1_client)
+ offset = RSVD_7F_ADDR;
+ else
+ offset = RSVD_00_ADDR;
+
+ ret = i2c_smbus_write_byte_data(client, offset, 0x00);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev,
+ "fail to access i2c id=%x\n:%x",
+ client->addr, offset);
+
+ return ret;
+}
+
+static int anx7625_reg_read(struct anx7625_data *ctx,
+ struct i2c_client *client, u8 reg_addr)
+{
+ int ret;
+ struct device *dev = &client->dev;
+
+ i2c_access_workaround(ctx, client);
+
+ ret = i2c_smbus_read_byte_data(client, reg_addr);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "read i2c fail id=%x:%x\n",
+ client->addr, reg_addr);
+
+ return ret;
+}
+
+static int anx7625_reg_block_read(struct anx7625_data *ctx,
+ struct i2c_client *client,
+ u8 reg_addr, u8 len, u8 *buf)
+{
+ int ret;
+ struct device *dev = &client->dev;
+
+ i2c_access_workaround(ctx, client);
+
+ ret = i2c_smbus_read_i2c_block_data(client, reg_addr, len, buf);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "read i2c block fail id=%x:%x\n",
+ client->addr, reg_addr);
+
+ return ret;
+}
+
+static int anx7625_reg_write(struct anx7625_data *ctx,
+ struct i2c_client *client,
+ u8 reg_addr, u8 reg_val)
+{
+ int ret;
+ struct device *dev = &client->dev;
+
+ i2c_access_workaround(ctx, client);
+
+ ret = i2c_smbus_write_byte_data(client, reg_addr, reg_val);
+
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "fail to write i2c id=%x\n:%x",
+ client->addr, reg_addr);
+
+ return ret;
+}
+
+static int anx7625_reg_block_write(struct anx7625_data *ctx,
+ struct i2c_client *client,
+ u8 reg_addr, u8 len, u8 *buf)
+{
+ int ret;
+ struct device *dev = &client->dev;
+
+ i2c_access_workaround(ctx, client);
+
+ ret = i2c_smbus_write_i2c_block_data(client, reg_addr, len, buf);
+ if (ret < 0)
+ dev_err(dev, "write i2c block failed id=%x\n:%x",
+ client->addr, reg_addr);
+
+ return ret;
+}
+
+static int anx7625_write_or(struct anx7625_data *ctx,
+ struct i2c_client *client,
+ u8 offset, u8 mask)
+{
+ int val;
+
+ val = anx7625_reg_read(ctx, client, offset);
+ if (val < 0)
+ return val;
+
+ return anx7625_reg_write(ctx, client, offset, (val | (mask)));
+}
+
+static int anx7625_write_and(struct anx7625_data *ctx,
+ struct i2c_client *client,
+ u8 offset, u8 mask)
+{
+ int val;
+
+ val = anx7625_reg_read(ctx, client, offset);
+ if (val < 0)
+ return val;
+
+ return anx7625_reg_write(ctx, client, offset, (val & (mask)));
+}
+
+static int anx7625_write_and_or(struct anx7625_data *ctx,
+ struct i2c_client *client,
+ u8 offset, u8 and_mask, u8 or_mask)
+{
+ int val;
+
+ val = anx7625_reg_read(ctx, client, offset);
+ if (val < 0)
+ return val;
+
+ return anx7625_reg_write(ctx, client,
+ offset, (val & and_mask) | (or_mask));
+}
+
+static int anx7625_config_bit_matrix(struct anx7625_data *ctx)
+{
+ int i, ret;
+
+ ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
+ AUDIO_CONTROL_REGISTER, 0x80);
+ for (i = 0; i < 13; i++)
+ ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
+ VIDEO_BIT_MATRIX_12 + i,
+ 0x18 + i);
+
+ return ret;
+}
+
+static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
+{
+ return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_CTRL_STATUS);
+}
+
+static int wait_aux_op_finish(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ int val;
+ int ret;
+
+ ret = readx_poll_timeout(anx7625_read_ctrl_status_p0,
+ ctx, val,
+ (!(val & AP_AUX_CTRL_OP_EN) || (val < 0)),
+ 2000,
+ 2000 * 150);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "aux operation fail!\n");
+ return -EIO;
+ }
+
+ val = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_CTRL_STATUS);
+ if (val < 0 || (val & 0x0F)) {
+ DRM_DEV_ERROR(dev, "aux status %02x\n", val);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int anx7625_aux_trans(struct anx7625_data *ctx, u8 op, u32 address,
+ u8 len, u8 *buf)
+{
+ struct device *dev = &ctx->client->dev;
+ int ret;
+ u8 addrh, addrm, addrl;
+ u8 cmd;
+ bool is_write = !(op & DP_AUX_I2C_READ);
+
+ if (len > DP_AUX_MAX_PAYLOAD_BYTES) {
+ dev_err(dev, "exceed aux buffer len.\n");
+ return -EINVAL;
+ }
+
+ if (!len)
+ return len;
+
+ addrl = address & 0xFF;
+ addrm = (address >> 8) & 0xFF;
+ addrh = (address >> 16) & 0xFF;
+
+ if (!is_write)
+ op &= ~DP_AUX_I2C_MOT;
+ cmd = DPCD_CMD(len, op);
+
+ /* Set command and length */
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_COMMAND, cmd);
+
+ /* Set aux access address */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_ADDR_7_0, addrl);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_ADDR_15_8, addrm);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_ADDR_19_16, addrh);
+
+ if (is_write)
+ ret |= anx7625_reg_block_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_BUFF_START, len, buf);
+ /* Enable aux access */
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN);
+
+ if (ret < 0) {
+ dev_err(dev, "cannot access aux related register.\n");
+ return -EIO;
+ }
+
+ ret = wait_aux_op_finish(ctx);
+ if (ret < 0) {
+ dev_err(dev, "aux IO error: wait aux op finish.\n");
+ return ret;
+ }
+
+ /* Write done */
+ if (is_write)
+ return len;
+
+ /* Read done, read out dpcd data */
+ ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_BUFF_START, len, buf);
+ if (ret < 0) {
+ dev_err(dev, "read dpcd register failed\n");
+ return -EIO;
+ }
+
+ return len;
+}
+
+static int anx7625_video_mute_control(struct anx7625_data *ctx,
+ u8 status)
+{
+ int ret;
+
+ if (status) {
+ /* Set mute on flag */
+ ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, AP_MIPI_MUTE);
+ /* Clear mipi RX en */
+ ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, (u8)~AP_MIPI_RX_EN);
+ } else {
+ /* Mute off flag */
+ ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
+ /* Set MIPI RX EN */
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, AP_MIPI_RX_EN);
+ }
+
+ return ret;
+}
+
+/* Reduction of fraction a/b */
+static void anx7625_reduction_of_a_fraction(unsigned long *a, unsigned long *b)
+{
+ unsigned long gcd_num;
+ unsigned long tmp_a, tmp_b;
+ u32 i = 1;
+
+ gcd_num = gcd(*a, *b);
+ *a /= gcd_num;
+ *b /= gcd_num;
+
+ tmp_a = *a;
+ tmp_b = *b;
+
+ while ((*a > MAX_UNSIGNED_24BIT) || (*b > MAX_UNSIGNED_24BIT)) {
+ i++;
+ *a = tmp_a / i;
+ *b = tmp_b / i;
+ }
+
+ /*
+ * In the end, make a, b larger to have higher ODFC PLL
+ * output frequency accuracy
+ */
+ while ((*a < MAX_UNSIGNED_24BIT) && (*b < MAX_UNSIGNED_24BIT)) {
+ *a <<= 1;
+ *b <<= 1;
+ }
+
+ *a >>= 1;
+ *b >>= 1;
+}
+
+static int anx7625_calculate_m_n(u32 pixelclock,
+ unsigned long *m,
+ unsigned long *n,
+ u8 *post_divider)
+{
+ if (pixelclock > PLL_OUT_FREQ_ABS_MAX / POST_DIVIDER_MIN) {
+ /* Pixel clock frequency is too high */
+ DRM_ERROR("pixelclock too high, act(%d), maximum(%lu)\n",
+ pixelclock,
+ PLL_OUT_FREQ_ABS_MAX / POST_DIVIDER_MIN);
+ return -EINVAL;
+ }
+
+ if (pixelclock < PLL_OUT_FREQ_ABS_MIN / POST_DIVIDER_MAX) {
+ /* Pixel clock frequency is too low */
+ DRM_ERROR("pixelclock too low, act(%d), maximum(%lu)\n",
+ pixelclock,
+ PLL_OUT_FREQ_ABS_MIN / POST_DIVIDER_MAX);
+ return -EINVAL;
+ }
+
+ for (*post_divider = 1;
+ pixelclock < (PLL_OUT_FREQ_MIN / (*post_divider));)
+ *post_divider += 1;
+
+ if (*post_divider > POST_DIVIDER_MAX) {
+ for (*post_divider = 1;
+ (pixelclock <
+ (PLL_OUT_FREQ_ABS_MIN / (*post_divider)));)
+ *post_divider += 1;
+
+ if (*post_divider > POST_DIVIDER_MAX) {
+ DRM_ERROR("cannot find property post_divider(%d)\n",
+ *post_divider);
+ return -EDOM;
+ }
+ }
+
+ /* Patch to improve the accuracy */
+ if (*post_divider == 7) {
+ /* 27,000,000 is not divisible by 7 */
+ *post_divider = 8;
+ } else if (*post_divider == 11) {
+ /* 27,000,000 is not divisible by 11 */
+ *post_divider = 12;
+ } else if ((*post_divider == 13) || (*post_divider == 14)) {
+ /* 27,000,000 is not divisible by 13 or 14 */
+ *post_divider = 15;
+ }
+
+ if (pixelclock * (*post_divider) > PLL_OUT_FREQ_ABS_MAX) {
+ DRM_ERROR("act clock(%u) large than maximum(%lu)\n",
+ pixelclock * (*post_divider),
+ PLL_OUT_FREQ_ABS_MAX);
+ return -EDOM;
+ }
+
+ *m = pixelclock;
+ *n = XTAL_FRQ / (*post_divider);
+
+ anx7625_reduction_of_a_fraction(m, n);
+
+ return 0;
+}
+
+static int anx7625_odfc_config(struct anx7625_data *ctx,
+ u8 post_divider)
+{
+ int ret;
+ struct device *dev = &ctx->client->dev;
+
+ /* Config input reference clock frequency 27MHz/19.2MHz */
+ ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_16,
+ ~(REF_CLK_27000KHZ << MIPI_FREF_D_IND));
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_16,
+ (REF_CLK_27000KHZ << MIPI_FREF_D_IND));
+ /* Post divider */
+ ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
+ MIPI_DIGITAL_PLL_8, 0x0f);
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_8,
+ post_divider << 4);
+
+ /* Add patch for MIS2-125 (5pcs ANX7625 fail ATE MBIST test) */
+ ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
+ ~MIPI_PLL_VCO_TUNE_REG_VAL);
+
+ /* Reset ODFC PLL */
+ ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
+ ~MIPI_PLL_RESET_N);
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
+ MIPI_PLL_RESET_N);
+
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "IO error.\n");
+
+ return ret;
+}
+
+/*
+ * The MIPI source video data exist large variation (e.g. 59Hz ~ 61Hz),
+ * anx7625 defined K ratio for matching MIPI input video clock and
+ * DP output video clock. Increase K value can match bigger video data
+ * variation. IVO panel has small variation than DP CTS spec, need
+ * decrease the K value.
+ */
+static int anx7625_set_k_value(struct anx7625_data *ctx)
+{
+ struct edid *edid = (struct edid *)ctx->slimport_edid_p.edid_raw_data;
+
+ if (edid->mfg_id[0] == IVO_MID0 && edid->mfg_id[1] == IVO_MID1)
+ return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_DIGITAL_ADJ_1, 0x3B);
+
+ return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_DIGITAL_ADJ_1, 0x3D);
+}
+
+static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ unsigned long m, n;
+ u16 htotal;
+ int ret;
+ u8 post_divider = 0;
+
+ ret = anx7625_calculate_m_n(ctx->dt.pixelclock.min * 1000,
+ &m, &n, &post_divider);
+
+ if (ret) {
+ DRM_DEV_ERROR(dev, "cannot get property m n value.\n");
+ return ret;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "compute M(%lu), N(%lu), divider(%d).\n",
+ m, n, post_divider);
+
+ /* Configure pixel clock */
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, PIXEL_CLOCK_L,
+ (ctx->dt.pixelclock.min / 1000) & 0xFF);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, PIXEL_CLOCK_H,
+ (ctx->dt.pixelclock.min / 1000) >> 8);
+ /* Lane count */
+ ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
+ MIPI_LANE_CTRL_0, 0xfc);
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client,
+ MIPI_LANE_CTRL_0, ctx->pdata.mipi_lanes - 1);
+
+ /* Htotal */
+ htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
+ ctx->dt.hback_porch.min + ctx->dt.hsync_len.min;
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_TOTAL_PIXELS_L, htotal & 0xFF);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_TOTAL_PIXELS_H, htotal >> 8);
+ /* Hactive */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_ACTIVE_PIXELS_L, ctx->dt.hactive.min & 0xFF);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_ACTIVE_PIXELS_H, ctx->dt.hactive.min >> 8);
+ /* HFP */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_FRONT_PORCH_L, ctx->dt.hfront_porch.min);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_FRONT_PORCH_H,
+ ctx->dt.hfront_porch.min >> 8);
+ /* HWS */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_SYNC_WIDTH_L, ctx->dt.hsync_len.min);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_SYNC_WIDTH_H, ctx->dt.hsync_len.min >> 8);
+ /* HBP */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_BACK_PORCH_L, ctx->dt.hback_porch.min);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ HORIZONTAL_BACK_PORCH_H, ctx->dt.hback_porch.min >> 8);
+ /* Vactive */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, ACTIVE_LINES_L,
+ ctx->dt.vactive.min);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, ACTIVE_LINES_H,
+ ctx->dt.vactive.min >> 8);
+ /* VFP */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ VERTICAL_FRONT_PORCH, ctx->dt.vfront_porch.min);
+ /* VWS */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ VERTICAL_SYNC_WIDTH, ctx->dt.vsync_len.min);
+ /* VBP */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
+ VERTICAL_BACK_PORCH, ctx->dt.vback_porch.min);
+ /* M value */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_PLL_M_NUM_23_16, (m >> 16) & 0xff);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_PLL_M_NUM_15_8, (m >> 8) & 0xff);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_PLL_M_NUM_7_0, (m & 0xff));
+ /* N value */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_PLL_N_NUM_23_16, (n >> 16) & 0xff);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_PLL_N_NUM_15_8, (n >> 8) & 0xff);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_PLL_N_NUM_7_0,
+ (n & 0xff));
+
+ anx7625_set_k_value(ctx);
+
+ ret |= anx7625_odfc_config(ctx, post_divider - 1);
+
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "mipi dsi setup IO error.\n");
+
+ return ret;
+}
+
+static int anx7625_swap_dsi_lane3(struct anx7625_data *ctx)
+{
+ int val;
+ struct device *dev = &ctx->client->dev;
+
+ /* Swap MIPI-DSI data lane 3 P and N */
+ val = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, MIPI_SWAP);
+ if (val < 0) {
+ DRM_DEV_ERROR(dev, "IO error : access MIPI_SWAP.\n");
+ return -EIO;
+ }
+
+ val |= (1 << MIPI_SWAP_CH3);
+ return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_SWAP, val);
+}
+
+static int anx7625_api_dsi_config(struct anx7625_data *ctx)
+
+{
+ int val, ret;
+ struct device *dev = &ctx->client->dev;
+
+ /* Swap MIPI-DSI data lane 3 P and N */
+ ret = anx7625_swap_dsi_lane3(ctx);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "IO error : swap dsi lane 3 fail.\n");
+ return ret;
+ }
+
+ /* DSI clock settings */
+ val = (0 << MIPI_HS_PWD_CLK) |
+ (0 << MIPI_HS_RT_CLK) |
+ (0 << MIPI_PD_CLK) |
+ (1 << MIPI_CLK_RT_MANUAL_PD_EN) |
+ (1 << MIPI_CLK_HS_MANUAL_PD_EN) |
+ (0 << MIPI_CLK_DET_DET_BYPASS) |
+ (0 << MIPI_CLK_MISS_CTRL) |
+ (0 << MIPI_PD_LPTX_CH_MANUAL_PD_EN);
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_PHY_CONTROL_3, val);
+
+ /*
+ * Decreased HS prepare timing delay from 160ns to 80ns work with
+ * a) Dragon board 810 series (Qualcomm AP)
+ * b) Moving Pixel DSI source (PG3A pattern generator +
+ * P332 D-PHY Probe) default D-PHY timing
+ * 5ns/step
+ */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_TIME_HS_PRPR, 0x10);
+
+ /* Enable DSI mode*/
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_18,
+ SELECT_DSI << MIPI_DPI_SELECT);
+
+ ret |= anx7625_dsi_video_timing_config(ctx);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "dsi video timing config fail\n");
+ return ret;
+ }
+
+ /* Toggle m, n ready */
+ ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_6,
+ ~(MIPI_M_NUM_READY | MIPI_N_NUM_READY));
+ usleep_range(1000, 1100);
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_6,
+ MIPI_M_NUM_READY | MIPI_N_NUM_READY);
+
+ /* Configure integer stable register */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_VIDEO_STABLE_CNT, 0x02);
+ /* Power on MIPI RX */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_LANE_CTRL_10, 0x00);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_LANE_CTRL_10, 0x80);
+
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "IO error : mipi dsi enable init fail.\n");
+
+ return ret;
+}
+
+static int anx7625_dsi_config(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ int ret;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "config dsi.\n");
+
+ /* DSC disable */
+ ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+ R_DSC_CTRL_0, ~DSC_EN);
+
+ ret |= anx7625_api_dsi_config(ctx);
+
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "IO error : api dsi config error.\n");
+ return ret;
+ }
+
+ /* Set MIPI RX EN */
+ ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, AP_MIPI_RX_EN);
+ /* Clear mute flag */
+ ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "IO error : enable mipi rx fail.\n");
+ else
+ DRM_DEV_DEBUG_DRIVER(dev, "success to config DSI\n");
+
+ return ret;
+}
+
+static int anx7625_api_dpi_config(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ u16 freq = ctx->dt.pixelclock.min / 1000;
+ int ret;
+
+ /* configure pixel clock */
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ PIXEL_CLOCK_L, freq & 0xFF);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ PIXEL_CLOCK_H, (freq >> 8));
+
+ /* set DPI mode */
+ /* set to DPI PLL module sel */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_DIGITAL_PLL_9, 0x20);
+ /* power down MIPI */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_LANE_CTRL_10, 0x08);
+ /* enable DPI mode */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
+ MIPI_DIGITAL_PLL_18, 0x1C);
+ /* set first edge */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
+ VIDEO_CONTROL_0, 0x06);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "IO error : dpi phy set failed.\n");
+
+ return ret;
+}
+
+static int anx7625_dpi_config(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ int ret;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "config dpi\n");
+
+ /* DSC disable */
+ ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+ R_DSC_CTRL_0, ~DSC_EN);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "IO error : disable dsc failed.\n");
+ return ret;
+ }
+
+ ret = anx7625_config_bit_matrix(ctx);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "config bit matrix failed.\n");
+ return ret;
+ }
+
+ ret = anx7625_api_dpi_config(ctx);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "mipi phy(dpi) setup failed.\n");
+ return ret;
+ }
+
+ /* set MIPI RX EN */
+ ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, AP_MIPI_RX_EN);
+ /* clear mute flag */
+ ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "IO error : enable mipi rx failed.\n");
+
+ return ret;
+}
+
+static int anx7625_read_flash_status(struct anx7625_data *ctx)
+{
+ return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, R_RAM_CTRL);
+}
+
+static int anx7625_hdcp_key_probe(struct anx7625_data *ctx)
+{
+ int ret, val;
+ struct device *dev = &ctx->client->dev;
+ u8 ident[FLASH_BUF_LEN];
+
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ FLASH_ADDR_HIGH, 0x91);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ FLASH_ADDR_LOW, 0xA0);
+ if (ret < 0) {
+ dev_err(dev, "IO error : set key flash address.\n");
+ return ret;
+ }
+
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ FLASH_LEN_HIGH, (FLASH_BUF_LEN - 1) >> 8);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ FLASH_LEN_LOW, (FLASH_BUF_LEN - 1) & 0xFF);
+ if (ret < 0) {
+ dev_err(dev, "IO error : set key flash len.\n");
+ return ret;
+ }
+
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ R_FLASH_RW_CTRL, FLASH_READ);
+ ret |= readx_poll_timeout(anx7625_read_flash_status,
+ ctx, val,
+ ((val & FLASH_DONE) || (val < 0)),
+ 2000,
+ 2000 * 150);
+ if (ret) {
+ dev_err(dev, "flash read access fail!\n");
+ return -EIO;
+ }
+
+ ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
+ FLASH_BUF_BASE_ADDR,
+ FLASH_BUF_LEN, ident);
+ if (ret < 0) {
+ dev_err(dev, "read flash data fail!\n");
+ return -EIO;
+ }
+
+ if (ident[29] == 0xFF && ident[30] == 0xFF && ident[31] == 0xFF)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int anx7625_hdcp_key_load(struct anx7625_data *ctx)
+{
+ int ret;
+ struct device *dev = &ctx->client->dev;
+
+ /* Select HDCP 1.4 KEY */
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ R_BOOT_RETRY, 0x12);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ FLASH_ADDR_HIGH, HDCP14KEY_START_ADDR >> 8);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ FLASH_ADDR_LOW, HDCP14KEY_START_ADDR & 0xFF);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ R_RAM_LEN_H, HDCP14KEY_SIZE >> 12);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ R_RAM_LEN_L, HDCP14KEY_SIZE >> 4);
+
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ R_RAM_ADDR_H, 0);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ R_RAM_ADDR_L, 0);
+ /* Enable HDCP 1.4 KEY load */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ R_RAM_CTRL, DECRYPT_EN | LOAD_START);
+ dev_dbg(dev, "load HDCP 1.4 key done\n");
+ return ret;
+}
+
+static int anx7625_hdcp_disable(struct anx7625_data *ctx)
+{
+ int ret;
+ struct device *dev = &ctx->client->dev;
+
+ dev_dbg(dev, "disable HDCP 1.4\n");
+
+ /* Disable HDCP */
+ ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f);
+ /* Try auth flag */
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
+ /* Interrupt for DRM */
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
+ if (ret < 0)
+ dev_err(dev, "fail to disable HDCP\n");
+
+ return anx7625_write_and(ctx, ctx->i2c.tx_p0_client,
+ TX_HDCP_CTRL0, ~HARD_AUTH_EN & 0xFF);
+}
+
+static int anx7625_hdcp_enable(struct anx7625_data *ctx)
+{
+ u8 bcap;
+ int ret;
+ struct device *dev = &ctx->client->dev;
+
+ ret = anx7625_hdcp_key_probe(ctx);
+ if (ret) {
+ dev_dbg(dev, "no key found, not to do hdcp\n");
+ return ret;
+ }
+
+ /* Read downstream capability */
+ ret = anx7625_aux_trans(ctx, DP_AUX_NATIVE_READ, DP_AUX_HDCP_BCAPS, 1, &bcap);
+ if (ret < 0)
+ return ret;
+
+ if (!(bcap & DP_BCAPS_HDCP_CAPABLE)) {
+ pr_warn("downstream not support HDCP 1.4, cap(%x).\n", bcap);
+ return 0;
+ }
+
+ dev_dbg(dev, "enable HDCP 1.4\n");
+
+ /* First clear HDCP state */
+ ret = anx7625_reg_write(ctx, ctx->i2c.tx_p0_client,
+ TX_HDCP_CTRL0,
+ KSVLIST_VLD | BKSV_SRM_PASS | RE_AUTHEN);
+ usleep_range(1000, 1100);
+ /* Second clear HDCP state */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p0_client,
+ TX_HDCP_CTRL0,
+ KSVLIST_VLD | BKSV_SRM_PASS | RE_AUTHEN);
+
+ /* Set time for waiting KSVR */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p0_client,
+ SP_TX_WAIT_KSVR_TIME, 0xc8);
+ /* Set time for waiting R0 */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p0_client,
+ SP_TX_WAIT_R0_TIME, 0xb0);
+ ret |= anx7625_hdcp_key_load(ctx);
+ if (ret) {
+ pr_warn("prepare HDCP key failed.\n");
+ return ret;
+ }
+
+ ret = anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xee, 0x20);
+
+ /* Try auth flag */
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
+ /* Interrupt for DRM */
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
+ if (ret < 0)
+ dev_err(dev, "fail to enable HDCP\n");
+
+ return anx7625_write_or(ctx, ctx->i2c.tx_p0_client,
+ TX_HDCP_CTRL0, HARD_AUTH_EN);
+}
+
+static void anx7625_dp_start(struct anx7625_data *ctx)
+{
+ int ret;
+ struct device *dev = &ctx->client->dev;
+ u8 data;
+
+ if (!ctx->display_timing_valid) {
+ DRM_DEV_ERROR(dev, "mipi not set display timing yet.\n");
+ return;
+ }
+
+ dev_dbg(dev, "set downstream sink into normal\n");
+ /* Downstream sink enter into normal mode */
+ data = DP_SET_POWER_D0;
+ ret = anx7625_aux_trans(ctx, DP_AUX_NATIVE_WRITE, DP_SET_POWER, 1, &data);
+ if (ret < 0)
+ dev_err(dev, "IO error : set sink into normal mode fail\n");
+
+ /* Disable HDCP */
+ anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f);
+
+ if (ctx->pdata.is_dpi)
+ ret = anx7625_dpi_config(ctx);
+ else
+ ret = anx7625_dsi_config(ctx);
+
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "MIPI phy setup error.\n");
+
+ ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_UNDESIRED;
+
+ ctx->dp_en = 1;
+}
+
+static void anx7625_dp_stop(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ int ret;
+ u8 data;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "stop dp output\n");
+
+ /*
+ * Video disable: 0x72:08 bit 7 = 0;
+ * Audio disable: 0x70:87 bit 0 = 0;
+ */
+ ret = anx7625_write_and(ctx, ctx->i2c.tx_p0_client, 0x87, 0xfe);
+ ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, 0x08, 0x7f);
+
+ ret |= anx7625_video_mute_control(ctx, 1);
+
+ dev_dbg(dev, "notify downstream enter into standby\n");
+ /* Downstream monitor enter into standby mode */
+ data = DP_SET_POWER_D3;
+ ret |= anx7625_aux_trans(ctx, DP_AUX_NATIVE_WRITE, DP_SET_POWER, 1, &data);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "IO error : mute video fail\n");
+
+ ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_UNDESIRED;
+
+ ctx->dp_en = 0;
+}
+
+static int sp_tx_rst_aux(struct anx7625_data *ctx)
+{
+ int ret;
+
+ ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client, RST_CTRL2,
+ AUX_RST);
+ ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, RST_CTRL2,
+ ~AUX_RST);
+ return ret;
+}
+
+static int sp_tx_aux_wr(struct anx7625_data *ctx, u8 offset)
+{
+ int ret;
+
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_BUFF_START, offset);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_COMMAND, 0x04);
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN);
+ return (ret | wait_aux_op_finish(ctx));
+}
+
+static int sp_tx_aux_rd(struct anx7625_data *ctx, u8 len_cmd)
+{
+ int ret;
+
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_COMMAND, len_cmd);
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN);
+ return (ret | wait_aux_op_finish(ctx));
+}
+
+static int sp_tx_get_edid_block(struct anx7625_data *ctx)
+{
+ int c = 0;
+ struct device *dev = &ctx->client->dev;
+
+ sp_tx_aux_wr(ctx, 0x7e);
+ sp_tx_aux_rd(ctx, 0x01);
+ c = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_BUFF_START);
+ if (c < 0) {
+ DRM_DEV_ERROR(dev, "IO error : access AUX BUFF.\n");
+ return -EIO;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, " EDID Block = %d\n", c + 1);
+
+ if (c > MAX_EDID_BLOCK)
+ c = 1;
+
+ return c;
+}
+
+static int edid_read(struct anx7625_data *ctx,
+ u8 offset, u8 *pblock_buf)
+{
+ int ret, cnt;
+ struct device *dev = &ctx->client->dev;
+
+ for (cnt = 0; cnt <= EDID_TRY_CNT; cnt++) {
+ sp_tx_aux_wr(ctx, offset);
+ /* Set I2C read com 0x01 mot = 0 and read 16 bytes */
+ ret = sp_tx_aux_rd(ctx, 0xf1);
+
+ if (ret) {
+ ret = sp_tx_rst_aux(ctx);
+ DRM_DEV_DEBUG_DRIVER(dev, "edid read fail, reset!\n");
+ } else {
+ ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_BUFF_START,
+ MAX_DPCD_BUFFER_SIZE,
+ pblock_buf);
+ if (ret > 0)
+ break;
+ }
+ }
+
+ if (cnt > EDID_TRY_CNT)
+ return -EIO;
+
+ return ret;
+}
+
+static int segments_edid_read(struct anx7625_data *ctx,
+ u8 segment, u8 *buf, u8 offset)
+{
+ u8 cnt;
+ int ret;
+ struct device *dev = &ctx->client->dev;
+
+ /* Write address only */
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_ADDR_7_0, 0x30);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_COMMAND, 0x04);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_CTRL_STATUS,
+ AP_AUX_CTRL_ADDRONLY | AP_AUX_CTRL_OP_EN);
+
+ ret |= wait_aux_op_finish(ctx);
+ /* Write segment address */
+ ret |= sp_tx_aux_wr(ctx, segment);
+ /* Data read */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_ADDR_7_0, 0x50);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "IO error : aux initial fail.\n");
+ return ret;
+ }
+
+ for (cnt = 0; cnt <= EDID_TRY_CNT; cnt++) {
+ sp_tx_aux_wr(ctx, offset);
+ /* Set I2C read com 0x01 mot = 0 and read 16 bytes */
+ ret = sp_tx_aux_rd(ctx, 0xf1);
+
+ if (ret) {
+ ret = sp_tx_rst_aux(ctx);
+ DRM_DEV_ERROR(dev, "segment read fail, reset!\n");
+ } else {
+ ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_BUFF_START,
+ MAX_DPCD_BUFFER_SIZE, buf);
+ if (ret > 0)
+ break;
+ }
+ }
+
+ if (cnt > EDID_TRY_CNT)
+ return -EIO;
+
+ return ret;
+}
+
+static int sp_tx_edid_read(struct anx7625_data *ctx,
+ u8 *pedid_blocks_buf)
+{
+ u8 offset;
+ int edid_pos;
+ int count, blocks_num;
+ u8 pblock_buf[MAX_DPCD_BUFFER_SIZE];
+ u8 i, j;
+ int g_edid_break = 0;
+ int ret;
+ struct device *dev = &ctx->client->dev;
+
+ /* Address initial */
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_ADDR_7_0, 0x50);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_ADDR_15_8, 0);
+ ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
+ AP_AUX_ADDR_19_16, 0xf0);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "access aux channel IO error.\n");
+ return -EIO;
+ }
+
+ blocks_num = sp_tx_get_edid_block(ctx);
+ if (blocks_num < 0)
+ return blocks_num;
+
+ count = 0;
+
+ do {
+ switch (count) {
+ case 0:
+ case 1:
+ for (i = 0; i < 8; i++) {
+ offset = (i + count * 8) * MAX_DPCD_BUFFER_SIZE;
+ g_edid_break = edid_read(ctx, offset,
+ pblock_buf);
+
+ if (g_edid_break < 0)
+ break;
+
+ memcpy(&pedid_blocks_buf[offset],
+ pblock_buf,
+ MAX_DPCD_BUFFER_SIZE);
+ }
+
+ break;
+ case 2:
+ offset = 0x00;
+
+ for (j = 0; j < 8; j++) {
+ edid_pos = (j + count * 8) *
+ MAX_DPCD_BUFFER_SIZE;
+
+ if (g_edid_break == 1)
+ break;
+
+ ret = segments_edid_read(ctx, count / 2,
+ pblock_buf, offset);
+ if (ret < 0)
+ return ret;
+
+ memcpy(&pedid_blocks_buf[edid_pos],
+ pblock_buf,
+ MAX_DPCD_BUFFER_SIZE);
+ offset = offset + 0x10;
+ }
+
+ break;
+ case 3:
+ offset = 0x80;
+
+ for (j = 0; j < 8; j++) {
+ edid_pos = (j + count * 8) *
+ MAX_DPCD_BUFFER_SIZE;
+ if (g_edid_break == 1)
+ break;
+
+ ret = segments_edid_read(ctx, count / 2,
+ pblock_buf, offset);
+ if (ret < 0)
+ return ret;
+
+ memcpy(&pedid_blocks_buf[edid_pos],
+ pblock_buf,
+ MAX_DPCD_BUFFER_SIZE);
+ offset = offset + 0x10;
+ }
+
+ break;
+ default:
+ break;
+ }
+
+ count++;
+
+ } while (blocks_num >= count);
+
+ /* Check edid data */
+ if (!drm_edid_is_valid((struct edid *)pedid_blocks_buf)) {
+ DRM_DEV_ERROR(dev, "WARNING! edid check fail!\n");
+ return -EINVAL;
+ }
+
+ /* Reset aux channel */
+ ret = sp_tx_rst_aux(ctx);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to reset aux channel!\n");
+ return ret;
+ }
+
+ return (blocks_num + 1);
+}
+
+static void anx7625_power_on(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ int ret, i;
+
+ if (!ctx->pdata.low_power_mode) {
+ DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n");
+ return;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(ctx->pdata.supplies); i++) {
+ ret = regulator_enable(ctx->pdata.supplies[i].consumer);
+ if (ret < 0) {
+ DRM_DEV_DEBUG_DRIVER(dev, "cannot enable supply %d: %d\n",
+ i, ret);
+ goto reg_err;
+ }
+ usleep_range(2000, 2100);
+ }
+
+ usleep_range(11000, 12000);
+
+ /* Power on pin enable */
+ gpiod_set_value(ctx->pdata.gpio_p_on, 1);
+ usleep_range(10000, 11000);
+ /* Power reset pin enable */
+ gpiod_set_value(ctx->pdata.gpio_reset, 1);
+ usleep_range(10000, 11000);
+
+ DRM_DEV_DEBUG_DRIVER(dev, "power on !\n");
+ return;
+reg_err:
+ for (--i; i >= 0; i--)
+ regulator_disable(ctx->pdata.supplies[i].consumer);
+}
+
+static void anx7625_power_standby(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ int ret;
+
+ if (!ctx->pdata.low_power_mode) {
+ DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n");
+ return;
+ }
+
+ gpiod_set_value(ctx->pdata.gpio_reset, 0);
+ usleep_range(1000, 1100);
+ gpiod_set_value(ctx->pdata.gpio_p_on, 0);
+ usleep_range(1000, 1100);
+
+ ret = regulator_bulk_disable(ARRAY_SIZE(ctx->pdata.supplies),
+ ctx->pdata.supplies);
+ if (ret < 0)
+ DRM_DEV_DEBUG_DRIVER(dev, "cannot disable supplies %d\n", ret);
+
+ DRM_DEV_DEBUG_DRIVER(dev, "power down\n");
+}
+
+/* Basic configurations of ANX7625 */
+static void anx7625_config(struct anx7625_data *ctx)
+{
+ anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ XTAL_FRQ_SEL, XTAL_FRQ_27M);
+}
+
+static void anx7625_disable_pd_protocol(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ int ret;
+
+ /* Reset main ocm */
+ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x40);
+ /* Disable PD */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, AP_DISABLE_PD);
+ /* Release main ocm */
+ ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x00);
+
+ if (ret < 0)
+ DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature fail.\n");
+ else
+ DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature succeeded.\n");
+}
+
+static int anx7625_ocm_loading_check(struct anx7625_data *ctx)
+{
+ int ret;
+ struct device *dev = &ctx->client->dev;
+
+ /* Check interface workable */
+ ret = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
+ FLASH_LOAD_STA);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "IO error : access flash load.\n");
+ return ret;
+ }
+ if ((ret & FLASH_LOAD_STA_CHK) != FLASH_LOAD_STA_CHK)
+ return -ENODEV;
+
+ anx7625_disable_pd_protocol(ctx);
+
+ DRM_DEV_DEBUG_DRIVER(dev, "Firmware ver %02x%02x,",
+ anx7625_reg_read(ctx,
+ ctx->i2c.rx_p0_client,
+ OCM_FW_VERSION),
+ anx7625_reg_read(ctx,
+ ctx->i2c.rx_p0_client,
+ OCM_FW_REVERSION));
+ DRM_DEV_DEBUG_DRIVER(dev, "Driver version %s\n",
+ ANX7625_DRV_VERSION);
+
+ return 0;
+}
+
+static void anx7625_power_on_init(struct anx7625_data *ctx)
+{
+ int retry_count, i;
+
+ for (retry_count = 0; retry_count < 3; retry_count++) {
+ anx7625_power_on(ctx);
+ anx7625_config(ctx);
+
+ for (i = 0; i < OCM_LOADING_TIME; i++) {
+ if (!anx7625_ocm_loading_check(ctx))
+ return;
+ usleep_range(1000, 1100);
+ }
+ anx7625_power_standby(ctx);
+ }
+}
+
+static void anx7625_init_gpio(struct anx7625_data *platform)
+{
+ struct device *dev = &platform->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "init gpio\n");
+
+ /* Gpio for chip power enable */
+ platform->pdata.gpio_p_on =
+ devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
+ if (IS_ERR_OR_NULL(platform->pdata.gpio_p_on)) {
+ DRM_DEV_DEBUG_DRIVER(dev, "no enable gpio found\n");
+ platform->pdata.gpio_p_on = NULL;
+ }
+
+ /* Gpio for chip reset */
+ platform->pdata.gpio_reset =
+ devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR_OR_NULL(platform->pdata.gpio_reset)) {
+ DRM_DEV_DEBUG_DRIVER(dev, "no reset gpio found\n");
+ platform->pdata.gpio_reset = NULL;
+ }
+
+ if (platform->pdata.gpio_p_on && platform->pdata.gpio_reset) {
+ platform->pdata.low_power_mode = 1;
+ DRM_DEV_DEBUG_DRIVER(dev, "low power mode, pon %d, reset %d.\n",
+ desc_to_gpio(platform->pdata.gpio_p_on),
+ desc_to_gpio(platform->pdata.gpio_reset));
+ } else {
+ platform->pdata.low_power_mode = 0;
+ DRM_DEV_DEBUG_DRIVER(dev, "not low power mode.\n");
+ }
+}
+
+static void anx7625_stop_dp_work(struct anx7625_data *ctx)
+{
+ ctx->hpd_status = 0;
+ ctx->hpd_high_cnt = 0;
+ ctx->display_timing_valid = 0;
+}
+
+static void anx7625_start_dp_work(struct anx7625_data *ctx)
+{
+ int ret;
+ struct device *dev = &ctx->client->dev;
+
+ if (ctx->hpd_high_cnt >= 2) {
+ DRM_DEV_DEBUG_DRIVER(dev, "filter useless HPD\n");
+ return;
+ }
+
+ ctx->hpd_status = 1;
+ ctx->hpd_high_cnt++;
+
+ /* Not support HDCP */
+ ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f);
+
+ /* Try auth flag */
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
+ /* Interrupt for DRM */
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "fail to setting HDCP/auth\n");
+ return;
+ }
+
+ ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
+ if (ret < 0)
+ return;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "Secure OCM version=%02x\n", ret);
+}
+
+static int anx7625_read_hpd_status_p0(struct anx7625_data *ctx)
+{
+ int ret;
+
+ /* Set irq detect window to 2ms */
+ ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
+ HPD_DET_TIMER_BIT0_7, HPD_TIME & 0xFF);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
+ HPD_DET_TIMER_BIT8_15,
+ (HPD_TIME >> 8) & 0xFF);
+ ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
+ HPD_DET_TIMER_BIT16_23,
+ (HPD_TIME >> 16) & 0xFF);
+ if (ret < 0)
+ return ret;
+
+ return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, SYSTEM_STSTUS);
+}
+
+static int _anx7625_hpd_polling(struct anx7625_data *ctx,
+ unsigned long wait_us)
+{
+ int ret, val;
+ struct device *dev = &ctx->client->dev;
+
+ /* Interrupt mode, no need poll HPD status, just return */
+ if (ctx->pdata.intp_irq)
+ return 0;
+
+ ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
+ ctx, val,
+ ((val & HPD_STATUS) || (val < 0)),
+ wait_us / 100,
+ wait_us);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "no hpd.\n");
+ return ret;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "system status: 0x%x. HPD raise up.\n", val);
+ anx7625_reg_write(ctx, ctx->i2c.tcpc_client,
+ INTR_ALERT_1, 0xFF);
+ anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ INTERFACE_CHANGE_INT, 0);
+
+ anx7625_start_dp_work(ctx);
+
+ if (!ctx->pdata.panel_bridge && ctx->bridge_attached)
+ drm_helper_hpd_irq_event(ctx->bridge.dev);
+
+ return 0;
+}
+
+static int anx7625_wait_hpd_asserted(struct drm_dp_aux *aux,
+ unsigned long wait_us)
+{
+ struct anx7625_data *ctx = container_of(aux, struct anx7625_data, aux);
+ struct device *dev = &ctx->client->dev;
+ int ret;
+
+ pm_runtime_get_sync(dev);
+ ret = _anx7625_hpd_polling(ctx, wait_us);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+
+ return ret;
+}
+
+static void anx7625_remove_edid(struct anx7625_data *ctx)
+{
+ ctx->slimport_edid_p.edid_block_num = -1;
+}
+
+static void anx7625_dp_adjust_swing(struct anx7625_data *ctx)
+{
+ int i;
+
+ for (i = 0; i < ctx->pdata.dp_lane0_swing_reg_cnt; i++)
+ anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
+ DP_TX_LANE0_SWING_REG0 + i,
+ ctx->pdata.lane0_reg_data[i]);
+
+ for (i = 0; i < ctx->pdata.dp_lane1_swing_reg_cnt; i++)
+ anx7625_reg_write(ctx, ctx->i2c.tx_p1_client,
+ DP_TX_LANE1_SWING_REG0 + i,
+ ctx->pdata.lane1_reg_data[i]);
+}
+
+static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
+{
+ struct device *dev = &ctx->client->dev;
+
+ /* HPD changed */
+ DRM_DEV_DEBUG_DRIVER(dev, "dp_hpd_change_default_func: %d\n",
+ (u32)on);
+
+ if (on == 0) {
+ DRM_DEV_DEBUG_DRIVER(dev, " HPD low\n");
+ anx7625_remove_edid(ctx);
+ anx7625_stop_dp_work(ctx);
+ } else {
+ DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
+ anx7625_start_dp_work(ctx);
+ anx7625_dp_adjust_swing(ctx);
+ }
+}
+
+static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
+{
+ int intr_vector, status;
+ struct device *dev = &ctx->client->dev;
+
+ status = anx7625_reg_write(ctx, ctx->i2c.tcpc_client,
+ INTR_ALERT_1, 0xFF);
+ if (status < 0) {
+ DRM_DEV_ERROR(dev, "cannot clear alert reg.\n");
+ return status;
+ }
+
+ intr_vector = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
+ INTERFACE_CHANGE_INT);
+ if (intr_vector < 0) {
+ DRM_DEV_ERROR(dev, "cannot access interrupt change reg.\n");
+ return intr_vector;
+ }
+ DRM_DEV_DEBUG_DRIVER(dev, "0x7e:0x44=%x\n", intr_vector);
+ status = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
+ INTERFACE_CHANGE_INT,
+ intr_vector & (~intr_vector));
+ if (status < 0) {
+ DRM_DEV_ERROR(dev, "cannot clear interrupt change reg.\n");
+ return status;
+ }
+
+ if (!(intr_vector & HPD_STATUS_CHANGE))
+ return -ENOENT;
+
+ status = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
+ SYSTEM_STSTUS);
+ if (status < 0) {
+ DRM_DEV_ERROR(dev, "cannot clear interrupt status.\n");
+ return status;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "0x7e:0x45=%x\n", status);
+ dp_hpd_change_handler(ctx, status & HPD_STATUS);
+
+ return 0;
+}
+
+static void anx7625_work_func(struct work_struct *work)
+{
+ int event;
+ struct anx7625_data *ctx = container_of(work,
+ struct anx7625_data, work);
+
+ mutex_lock(&ctx->lock);
+
+ if (pm_runtime_suspended(&ctx->client->dev))
+ goto unlock;
+
+ event = anx7625_hpd_change_detect(ctx);
+ if (event < 0)
+ goto unlock;
+
+ if (ctx->bridge_attached)
+ drm_helper_hpd_irq_event(ctx->bridge.dev);
+
+unlock:
+ mutex_unlock(&ctx->lock);
+}
+
+static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
+{
+ struct anx7625_data *ctx = (struct anx7625_data *)data;
+
+ queue_work(ctx->workqueue, &ctx->work);
+
+ return IRQ_HANDLED;
+}
+
+static int anx7625_get_swing_setting(struct device *dev,
+ struct anx7625_platform_data *pdata)
+{
+ int num_regs;
+
+ if (of_get_property(dev->of_node,
+ "analogix,lane0-swing", &num_regs)) {
+ if (num_regs > DP_TX_SWING_REG_CNT)
+ num_regs = DP_TX_SWING_REG_CNT;
+
+ pdata->dp_lane0_swing_reg_cnt = num_regs;
+ of_property_read_u8_array(dev->of_node, "analogix,lane0-swing",
+ pdata->lane0_reg_data, num_regs);
+ }
+
+ if (of_get_property(dev->of_node,
+ "analogix,lane1-swing", &num_regs)) {
+ if (num_regs > DP_TX_SWING_REG_CNT)
+ num_regs = DP_TX_SWING_REG_CNT;
+
+ pdata->dp_lane1_swing_reg_cnt = num_regs;
+ of_property_read_u8_array(dev->of_node, "analogix,lane1-swing",
+ pdata->lane1_reg_data, num_regs);
+ }
+
+ return 0;
+}
+
+static int anx7625_parse_dt(struct device *dev,
+ struct anx7625_platform_data *pdata)
+{
+ struct device_node *np = dev->of_node, *ep0;
+ int bus_type, mipi_lanes;
+
+ anx7625_get_swing_setting(dev, pdata);
+
+ pdata->is_dpi = 0; /* default dsi mode */
+ of_node_put(pdata->mipi_host_node);
+ pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
+ if (!pdata->mipi_host_node) {
+ DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
+ return -ENODEV;
+ }
+
+ bus_type = 0;
+ mipi_lanes = MAX_LANES_SUPPORT;
+ ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
+ if (ep0) {
+ if (of_property_read_u32(ep0, "bus-type", &bus_type))
+ bus_type = 0;
+
+ mipi_lanes = drm_of_get_data_lanes_count(ep0, 1, MAX_LANES_SUPPORT);
+ of_node_put(ep0);
+ }
+
+ if (bus_type == V4L2_FWNODE_BUS_TYPE_DPI) /* bus type is DPI */
+ pdata->is_dpi = 1;
+
+ pdata->mipi_lanes = MAX_LANES_SUPPORT;
+ if (mipi_lanes > 0)
+ pdata->mipi_lanes = mipi_lanes;
+
+ if (pdata->is_dpi)
+ DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DPI host node.\n");
+ else
+ DRM_DEV_DEBUG_DRIVER(dev, "found MIPI DSI host node.\n");
+
+ if (of_property_read_bool(np, "analogix,audio-enable"))
+ pdata->audio_en = 1;
+
+ return 0;
+}
+
+static int anx7625_parse_dt_panel(struct device *dev,
+ struct anx7625_platform_data *pdata)
+{
+ struct device_node *np = dev->of_node;
+
+ pdata->panel_bridge = devm_drm_of_get_bridge(dev, np, 1, 0);
+ if (IS_ERR(pdata->panel_bridge)) {
+ if (PTR_ERR(pdata->panel_bridge) == -ENODEV) {
+ pdata->panel_bridge = NULL;
+ return 0;
+ }
+
+ return PTR_ERR(pdata->panel_bridge);
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "get panel node.\n");
+
+ return 0;
+}
+
+static bool anx7625_of_panel_on_aux_bus(struct device *dev)
+{
+ struct device_node *bus, *panel;
+
+ bus = of_get_child_by_name(dev->of_node, "aux-bus");
+ if (!bus)
+ return false;
+
+ panel = of_get_child_by_name(bus, "panel");
+ of_node_put(bus);
+ if (!panel)
+ return false;
+ of_node_put(panel);
+
+ return true;
+}
+
+static inline struct anx7625_data *bridge_to_anx7625(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct anx7625_data, bridge);
+}
+
+static ssize_t anx7625_aux_transfer(struct drm_dp_aux *aux,
+ struct drm_dp_aux_msg *msg)
+{
+ struct anx7625_data *ctx = container_of(aux, struct anx7625_data, aux);
+ struct device *dev = &ctx->client->dev;
+ u8 request = msg->request & ~DP_AUX_I2C_MOT;
+ int ret = 0;
+
+ mutex_lock(&ctx->aux_lock);
+ pm_runtime_get_sync(dev);
+ msg->reply = 0;
+ switch (request) {
+ case DP_AUX_NATIVE_WRITE:
+ case DP_AUX_I2C_WRITE:
+ case DP_AUX_NATIVE_READ:
+ case DP_AUX_I2C_READ:
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ if (!ret)
+ ret = anx7625_aux_trans(ctx, msg->request, msg->address,
+ msg->size, msg->buffer);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+ mutex_unlock(&ctx->aux_lock);
+
+ return ret;
+}
+
+static struct edid *anx7625_get_edid(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ struct s_edid_data *p_edid = &ctx->slimport_edid_p;
+ int edid_num;
+ u8 *edid;
+
+ edid = kmalloc(FOUR_BLOCK_SIZE, GFP_KERNEL);
+ if (!edid) {
+ DRM_DEV_ERROR(dev, "Fail to allocate buffer\n");
+ return NULL;
+ }
+
+ if (ctx->slimport_edid_p.edid_block_num > 0) {
+ memcpy(edid, ctx->slimport_edid_p.edid_raw_data,
+ FOUR_BLOCK_SIZE);
+ return (struct edid *)edid;
+ }
+
+ pm_runtime_get_sync(dev);
+ _anx7625_hpd_polling(ctx, 5000 * 100);
+ edid_num = sp_tx_edid_read(ctx, p_edid->edid_raw_data);
+ pm_runtime_put_sync(dev);
+
+ if (edid_num < 1) {
+ DRM_DEV_ERROR(dev, "Fail to read EDID: %d\n", edid_num);
+ kfree(edid);
+ return NULL;
+ }
+
+ p_edid->edid_block_num = edid_num;
+
+ memcpy(edid, ctx->slimport_edid_p.edid_raw_data, FOUR_BLOCK_SIZE);
+ return (struct edid *)edid;
+}
+
+static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "sink detect\n");
+
+ if (ctx->pdata.panel_bridge)
+ return connector_status_connected;
+
+ return ctx->hpd_status ? connector_status_connected :
+ connector_status_disconnected;
+}
+
+static int anx7625_audio_hw_params(struct device *dev, void *data,
+ struct hdmi_codec_daifmt *fmt,
+ struct hdmi_codec_params *params)
+{
+ struct anx7625_data *ctx = dev_get_drvdata(dev);
+ int wl, ch, rate;
+ int ret = 0;
+
+ if (anx7625_sink_detect(ctx) == connector_status_disconnected) {
+ DRM_DEV_DEBUG_DRIVER(dev, "DP not connected\n");
+ return 0;
+ }
+
+ if (fmt->fmt != HDMI_DSP_A && fmt->fmt != HDMI_I2S) {
+ DRM_DEV_ERROR(dev, "only supports DSP_A & I2S\n");
+ return -EINVAL;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "setting %d Hz, %d bit, %d channels\n",
+ params->sample_rate, params->sample_width,
+ params->cea.channels);
+
+ if (fmt->fmt == HDMI_DSP_A)
+ ret = anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
+ AUDIO_CHANNEL_STATUS_6,
+ ~I2S_SLAVE_MODE,
+ TDM_SLAVE_MODE);
+ else
+ ret = anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
+ AUDIO_CHANNEL_STATUS_6,
+ ~TDM_SLAVE_MODE,
+ I2S_SLAVE_MODE);
+
+ /* Word length */
+ switch (params->sample_width) {
+ case 16:
+ wl = AUDIO_W_LEN_16_20MAX;
+ break;
+ case 18:
+ wl = AUDIO_W_LEN_18_20MAX;
+ break;
+ case 20:
+ wl = AUDIO_W_LEN_20_20MAX;
+ break;
+ case 24:
+ wl = AUDIO_W_LEN_24_24MAX;
+ break;
+ default:
+ DRM_DEV_DEBUG_DRIVER(dev, "wordlength: %d bit not support",
+ params->sample_width);
+ return -EINVAL;
+ }
+ ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
+ AUDIO_CHANNEL_STATUS_5,
+ 0xf0, wl);
+
+ /* Channel num */
+ switch (params->cea.channels) {
+ case 2:
+ ch = I2S_CH_2;
+ break;
+ case 4:
+ ch = TDM_CH_4;
+ break;
+ case 6:
+ ch = TDM_CH_6;
+ break;
+ case 8:
+ ch = TDM_CH_8;
+ break;
+ default:
+ DRM_DEV_DEBUG_DRIVER(dev, "channel number: %d not support",
+ params->cea.channels);
+ return -EINVAL;
+ }
+ ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
+ AUDIO_CHANNEL_STATUS_6, 0x1f, ch << 5);
+ if (ch > I2S_CH_2)
+ ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
+ AUDIO_CHANNEL_STATUS_6, AUDIO_LAYOUT);
+ else
+ ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client,
+ AUDIO_CHANNEL_STATUS_6, ~AUDIO_LAYOUT);
+
+ /* FS */
+ switch (params->sample_rate) {
+ case 32000:
+ rate = AUDIO_FS_32K;
+ break;
+ case 44100:
+ rate = AUDIO_FS_441K;
+ break;
+ case 48000:
+ rate = AUDIO_FS_48K;
+ break;
+ case 88200:
+ rate = AUDIO_FS_882K;
+ break;
+ case 96000:
+ rate = AUDIO_FS_96K;
+ break;
+ case 176400:
+ rate = AUDIO_FS_1764K;
+ break;
+ case 192000:
+ rate = AUDIO_FS_192K;
+ break;
+ default:
+ DRM_DEV_DEBUG_DRIVER(dev, "sample rate: %d not support",
+ params->sample_rate);
+ return -EINVAL;
+ }
+ ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
+ AUDIO_CHANNEL_STATUS_4,
+ 0xf0, rate);
+ ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
+ AP_AV_STATUS, AP_AUDIO_CHG);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "IO error : config audio.\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static void anx7625_audio_shutdown(struct device *dev, void *data)
+{
+ DRM_DEV_DEBUG_DRIVER(dev, "stop audio\n");
+}
+
+static int anx7625_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
+ struct device_node *endpoint)
+{
+ struct of_endpoint of_ep;
+ int ret;
+
+ ret = of_graph_parse_endpoint(endpoint, &of_ep);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * HDMI sound should be located at external DPI port
+ * Didn't have good way to check where is internal(DSI)
+ * or external(DPI) bridge
+ */
+ return 0;
+}
+
+static void
+anx7625_audio_update_connector_status(struct anx7625_data *ctx,
+ enum drm_connector_status status)
+{
+ if (ctx->plugged_cb && ctx->codec_dev) {
+ ctx->plugged_cb(ctx->codec_dev,
+ status == connector_status_connected);
+ }
+}
+
+static int anx7625_audio_hook_plugged_cb(struct device *dev, void *data,
+ hdmi_codec_plugged_cb fn,
+ struct device *codec_dev)
+{
+ struct anx7625_data *ctx = data;
+
+ ctx->plugged_cb = fn;
+ ctx->codec_dev = codec_dev;
+ anx7625_audio_update_connector_status(ctx, anx7625_sink_detect(ctx));
+
+ return 0;
+}
+
+static int anx7625_audio_get_eld(struct device *dev, void *data,
+ u8 *buf, size_t len)
+{
+ struct anx7625_data *ctx = dev_get_drvdata(dev);
+
+ if (!ctx->connector) {
+ /* Pass en empty ELD if connector not available */
+ memset(buf, 0, len);
+ } else {
+ dev_dbg(dev, "audio copy eld\n");
+ memcpy(buf, ctx->connector->eld,
+ min(sizeof(ctx->connector->eld), len));
+ }
+
+ return 0;
+}
+
+static const struct hdmi_codec_ops anx7625_codec_ops = {
+ .hw_params = anx7625_audio_hw_params,
+ .audio_shutdown = anx7625_audio_shutdown,
+ .get_eld = anx7625_audio_get_eld,
+ .get_dai_id = anx7625_hdmi_i2s_get_dai_id,
+ .hook_plugged_cb = anx7625_audio_hook_plugged_cb,
+};
+
+static void anx7625_unregister_audio(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+
+ if (ctx->audio_pdev) {
+ platform_device_unregister(ctx->audio_pdev);
+ ctx->audio_pdev = NULL;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "unbound to %s", HDMI_CODEC_DRV_NAME);
+}
+
+static int anx7625_register_audio(struct device *dev, struct anx7625_data *ctx)
+{
+ struct hdmi_codec_pdata codec_data = {
+ .ops = &anx7625_codec_ops,
+ .max_i2s_channels = 8,
+ .i2s = 1,
+ .data = ctx,
+ };
+
+ ctx->audio_pdev = platform_device_register_data(dev,
+ HDMI_CODEC_DRV_NAME,
+ PLATFORM_DEVID_AUTO,
+ &codec_data,
+ sizeof(codec_data));
+
+ if (IS_ERR(ctx->audio_pdev))
+ return PTR_ERR(ctx->audio_pdev);
+
+ DRM_DEV_DEBUG_DRIVER(dev, "bound to %s", HDMI_CODEC_DRV_NAME);
+
+ return 0;
+}
+
+static int anx7625_setup_dsi_device(struct anx7625_data *ctx)
+{
+ struct mipi_dsi_device *dsi;
+ struct device *dev = &ctx->client->dev;
+ struct mipi_dsi_host *host;
+ const struct mipi_dsi_device_info info = {
+ .type = "anx7625",
+ .channel = 0,
+ .node = NULL,
+ };
+
+ host = of_find_mipi_dsi_host_by_node(ctx->pdata.mipi_host_node);
+ if (!host) {
+ DRM_DEV_ERROR(dev, "fail to find dsi host.\n");
+ return -EPROBE_DEFER;
+ }
+
+ dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
+ if (IS_ERR(dsi)) {
+ DRM_DEV_ERROR(dev, "fail to create dsi device.\n");
+ return -EINVAL;
+ }
+
+ dsi->lanes = ctx->pdata.mipi_lanes;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
+ MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
+ MIPI_DSI_MODE_VIDEO_HSE |
+ MIPI_DSI_HS_PKT_END_ALIGNED;
+
+ ctx->dsi = dsi;
+
+ return 0;
+}
+
+static int anx7625_attach_dsi(struct anx7625_data *ctx)
+{
+ struct device *dev = &ctx->client->dev;
+ int ret;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "attach dsi\n");
+
+ ret = devm_mipi_dsi_attach(dev, ctx->dsi);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "fail to attach dsi to host.\n");
+ return ret;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "attach dsi succeeded.\n");
+
+ return 0;
+}
+
+static void hdcp_check_work_func(struct work_struct *work)
+{
+ u8 status;
+ struct delayed_work *dwork;
+ struct anx7625_data *ctx;
+ struct device *dev;
+ struct drm_device *drm_dev;
+
+ dwork = to_delayed_work(work);
+ ctx = container_of(dwork, struct anx7625_data, hdcp_work);
+ dev = &ctx->client->dev;
+
+ if (!ctx->connector) {
+ dev_err(dev, "HDCP connector is null!");
+ return;
+ }
+
+ drm_dev = ctx->connector->dev;
+ drm_modeset_lock(&drm_dev->mode_config.connection_mutex, NULL);
+ mutex_lock(&ctx->hdcp_wq_lock);
+
+ status = anx7625_reg_read(ctx, ctx->i2c.tx_p0_client, 0);
+ dev_dbg(dev, "sink HDCP status check: %.02x\n", status);
+ if (status & BIT(1)) {
+ ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_ENABLED;
+ drm_hdcp_update_content_protection(ctx->connector,
+ ctx->hdcp_cp);
+ dev_dbg(dev, "update CP to ENABLE\n");
+ }
+
+ mutex_unlock(&ctx->hdcp_wq_lock);
+ drm_modeset_unlock(&drm_dev->mode_config.connection_mutex);
+}
+
+static int anx7625_connector_atomic_check(struct anx7625_data *ctx,
+ struct drm_connector_state *state)
+{
+ struct device *dev = &ctx->client->dev;
+ int cp;
+
+ dev_dbg(dev, "hdcp state check\n");
+ cp = state->content_protection;
+
+ if (cp == ctx->hdcp_cp)
+ return 0;
+
+ if (cp == DRM_MODE_CONTENT_PROTECTION_DESIRED) {
+ if (ctx->dp_en) {
+ dev_dbg(dev, "enable HDCP\n");
+ anx7625_hdcp_enable(ctx);
+
+ queue_delayed_work(ctx->hdcp_workqueue,
+ &ctx->hdcp_work,
+ msecs_to_jiffies(2000));
+ }
+ }
+
+ if (cp == DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
+ if (ctx->hdcp_cp != DRM_MODE_CONTENT_PROTECTION_ENABLED) {
+ dev_err(dev, "current CP is not ENABLED\n");
+ return -EINVAL;
+ }
+ anx7625_hdcp_disable(ctx);
+ ctx->hdcp_cp = DRM_MODE_CONTENT_PROTECTION_UNDESIRED;
+ drm_hdcp_update_content_protection(ctx->connector,
+ ctx->hdcp_cp);
+ dev_dbg(dev, "update CP to UNDESIRE\n");
+ }
+
+ if (cp == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
+ dev_err(dev, "Userspace illegal set to PROTECTION ENABLE\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int anx7625_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ int err;
+ struct device *dev = &ctx->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm attach\n");
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
+ return -EINVAL;
+
+ if (!bridge->encoder) {
+ DRM_DEV_ERROR(dev, "Parent encoder object not found");
+ return -ENODEV;
+ }
+
+ ctx->aux.drm_dev = bridge->dev;
+ err = drm_dp_aux_register(&ctx->aux);
+ if (err) {
+ dev_err(dev, "failed to register aux channel: %d\n", err);
+ return err;
+ }
+
+ if (ctx->pdata.panel_bridge) {
+ err = drm_bridge_attach(bridge->encoder,
+ ctx->pdata.panel_bridge,
+ &ctx->bridge, flags);
+ if (err)
+ return err;
+ }
+
+ ctx->bridge_attached = 1;
+
+ return 0;
+}
+
+static void anx7625_bridge_detach(struct drm_bridge *bridge)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+
+ drm_dp_aux_unregister(&ctx->aux);
+}
+
+static enum drm_mode_status
+anx7625_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ struct device *dev = &ctx->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm mode checking\n");
+
+ /* Max 1200p at 5.4 Ghz, one lane, pixel clock 300M */
+ if (mode->clock > SUPPORT_PIXEL_CLOCK) {
+ DRM_DEV_DEBUG_DRIVER(dev,
+ "drm mode invalid, pixelclock too high.\n");
+ return MODE_CLOCK_HIGH;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm mode valid.\n");
+
+ return MODE_OK;
+}
+
+static void anx7625_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *old_mode,
+ const struct drm_display_mode *mode)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ struct device *dev = &ctx->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm mode set\n");
+
+ ctx->dt.pixelclock.min = mode->clock;
+ ctx->dt.hactive.min = mode->hdisplay;
+ ctx->dt.hsync_len.min = mode->hsync_end - mode->hsync_start;
+ ctx->dt.hfront_porch.min = mode->hsync_start - mode->hdisplay;
+ ctx->dt.hback_porch.min = mode->htotal - mode->hsync_end;
+ ctx->dt.vactive.min = mode->vdisplay;
+ ctx->dt.vsync_len.min = mode->vsync_end - mode->vsync_start;
+ ctx->dt.vfront_porch.min = mode->vsync_start - mode->vdisplay;
+ ctx->dt.vback_porch.min = mode->vtotal - mode->vsync_end;
+
+ ctx->display_timing_valid = 1;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "pixelclock(%d).\n", ctx->dt.pixelclock.min);
+ DRM_DEV_DEBUG_DRIVER(dev, "hactive(%d), hsync(%d), hfp(%d), hbp(%d)\n",
+ ctx->dt.hactive.min,
+ ctx->dt.hsync_len.min,
+ ctx->dt.hfront_porch.min,
+ ctx->dt.hback_porch.min);
+ DRM_DEV_DEBUG_DRIVER(dev, "vactive(%d), vsync(%d), vfp(%d), vbp(%d)\n",
+ ctx->dt.vactive.min,
+ ctx->dt.vsync_len.min,
+ ctx->dt.vfront_porch.min,
+ ctx->dt.vback_porch.min);
+ DRM_DEV_DEBUG_DRIVER(dev, "hdisplay(%d),hsync_start(%d).\n",
+ mode->hdisplay,
+ mode->hsync_start);
+ DRM_DEV_DEBUG_DRIVER(dev, "hsync_end(%d),htotal(%d).\n",
+ mode->hsync_end,
+ mode->htotal);
+ DRM_DEV_DEBUG_DRIVER(dev, "vdisplay(%d),vsync_start(%d).\n",
+ mode->vdisplay,
+ mode->vsync_start);
+ DRM_DEV_DEBUG_DRIVER(dev, "vsync_end(%d),vtotal(%d).\n",
+ mode->vsync_end,
+ mode->vtotal);
+}
+
+static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adj)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ struct device *dev = &ctx->client->dev;
+ u32 hsync, hfp, hbp, hblanking;
+ u32 adj_hsync, adj_hfp, adj_hbp, adj_hblanking, delta_adj;
+ u32 vref, adj_clock;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n");
+
+ /* No need fixup for external monitor */
+ if (!ctx->pdata.panel_bridge)
+ return true;
+
+ hsync = mode->hsync_end - mode->hsync_start;
+ hfp = mode->hsync_start - mode->hdisplay;
+ hbp = mode->htotal - mode->hsync_end;
+ hblanking = mode->htotal - mode->hdisplay;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "before mode fixup\n");
+ DRM_DEV_DEBUG_DRIVER(dev, "hsync(%d), hfp(%d), hbp(%d), clock(%d)\n",
+ hsync, hfp, hbp, adj->clock);
+ DRM_DEV_DEBUG_DRIVER(dev, "hsync_start(%d), hsync_end(%d), htot(%d)\n",
+ adj->hsync_start, adj->hsync_end, adj->htotal);
+
+ adj_hfp = hfp;
+ adj_hsync = hsync;
+ adj_hbp = hbp;
+ adj_hblanking = hblanking;
+
+ /* HFP needs to be even */
+ if (hfp & 0x1) {
+ adj_hfp += 1;
+ adj_hblanking += 1;
+ }
+
+ /* HBP needs to be even */
+ if (hbp & 0x1) {
+ adj_hbp -= 1;
+ adj_hblanking -= 1;
+ }
+
+ /* HSYNC needs to be even */
+ if (hsync & 0x1) {
+ if (adj_hblanking < hblanking)
+ adj_hsync += 1;
+ else
+ adj_hsync -= 1;
+ }
+
+ /*
+ * Once illegal timing detected, use default HFP, HSYNC, HBP
+ * This adjusting made for built-in eDP panel, for the externel
+ * DP monitor, may need return false.
+ */
+ if (hblanking < HBLANKING_MIN || (hfp < HP_MIN && hbp < HP_MIN)) {
+ adj_hsync = SYNC_LEN_DEF;
+ adj_hfp = HFP_HBP_DEF;
+ adj_hbp = HFP_HBP_DEF;
+ vref = adj->clock * 1000 / (adj->htotal * adj->vtotal);
+ if (hblanking < HBLANKING_MIN) {
+ delta_adj = HBLANKING_MIN - hblanking;
+ adj_clock = vref * delta_adj * adj->vtotal;
+ adj->clock += DIV_ROUND_UP(adj_clock, 1000);
+ } else {
+ delta_adj = hblanking - HBLANKING_MIN;
+ adj_clock = vref * delta_adj * adj->vtotal;
+ adj->clock -= DIV_ROUND_UP(adj_clock, 1000);
+ }
+
+ DRM_WARN("illegal hblanking timing, use default.\n");
+ DRM_WARN("hfp(%d), hbp(%d), hsync(%d).\n", hfp, hbp, hsync);
+ } else if (adj_hfp < HP_MIN) {
+ /* Adjust hfp if hfp less than HP_MIN */
+ delta_adj = HP_MIN - adj_hfp;
+ adj_hfp = HP_MIN;
+
+ /*
+ * Balance total HBlanking pixel, if HBP does not have enough
+ * space, adjust HSYNC length, otherwise adjust HBP
+ */
+ if ((adj_hbp - delta_adj) < HP_MIN)
+ /* HBP not enough space */
+ adj_hsync -= delta_adj;
+ else
+ adj_hbp -= delta_adj;
+ } else if (adj_hbp < HP_MIN) {
+ delta_adj = HP_MIN - adj_hbp;
+ adj_hbp = HP_MIN;
+
+ /*
+ * Balance total HBlanking pixel, if HBP hasn't enough space,
+ * adjust HSYNC length, otherwize adjust HBP
+ */
+ if ((adj_hfp - delta_adj) < HP_MIN)
+ /* HFP not enough space */
+ adj_hsync -= delta_adj;
+ else
+ adj_hfp -= delta_adj;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "after mode fixup\n");
+ DRM_DEV_DEBUG_DRIVER(dev, "hsync(%d), hfp(%d), hbp(%d), clock(%d)\n",
+ adj_hsync, adj_hfp, adj_hbp, adj->clock);
+
+ /* Reconstruct timing */
+ adj->hsync_start = adj->hdisplay + adj_hfp;
+ adj->hsync_end = adj->hsync_start + adj_hsync;
+ adj->htotal = adj->hsync_end + adj_hbp;
+ DRM_DEV_DEBUG_DRIVER(dev, "hsync_start(%d), hsync_end(%d), htot(%d)\n",
+ adj->hsync_start, adj->hsync_end, adj->htotal);
+
+ return true;
+}
+
+static int anx7625_bridge_atomic_check(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ struct device *dev = &ctx->client->dev;
+
+ dev_dbg(dev, "drm bridge atomic check\n");
+
+ anx7625_bridge_mode_fixup(bridge, &crtc_state->mode,
+ &crtc_state->adjusted_mode);
+
+ return anx7625_connector_atomic_check(ctx, conn_state);
+}
+
+static void anx7625_bridge_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *state)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ struct device *dev = &ctx->client->dev;
+ struct drm_connector *connector;
+
+ dev_dbg(dev, "drm atomic enable\n");
+
+ if (!bridge->encoder) {
+ dev_err(dev, "Parent encoder object not found");
+ return;
+ }
+
+ connector = drm_atomic_get_new_connector_for_encoder(state->base.state,
+ bridge->encoder);
+ if (!connector)
+ return;
+
+ ctx->connector = connector;
+
+ pm_runtime_get_sync(dev);
+ _anx7625_hpd_polling(ctx, 5000 * 100);
+
+ anx7625_dp_start(ctx);
+}
+
+static void anx7625_bridge_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ struct device *dev = &ctx->client->dev;
+
+ dev_dbg(dev, "drm atomic disable\n");
+
+ ctx->connector = NULL;
+ anx7625_dp_stop(ctx);
+
+ mutex_lock(&ctx->aux_lock);
+ pm_runtime_put_sync_suspend(dev);
+ mutex_unlock(&ctx->aux_lock);
+}
+
+static enum drm_connector_status
+anx7625_bridge_detect(struct drm_bridge *bridge)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ struct device *dev = &ctx->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm bridge detect\n");
+
+ return anx7625_sink_detect(ctx);
+}
+
+static struct edid *anx7625_bridge_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct anx7625_data *ctx = bridge_to_anx7625(bridge);
+ struct device *dev = &ctx->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "drm bridge get edid\n");
+
+ return anx7625_get_edid(ctx);
+}
+
+static const struct drm_bridge_funcs anx7625_bridge_funcs = {
+ .attach = anx7625_bridge_attach,
+ .detach = anx7625_bridge_detach,
+ .mode_valid = anx7625_bridge_mode_valid,
+ .mode_set = anx7625_bridge_mode_set,
+ .atomic_check = anx7625_bridge_atomic_check,
+ .atomic_enable = anx7625_bridge_atomic_enable,
+ .atomic_disable = anx7625_bridge_atomic_disable,
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .detect = anx7625_bridge_detect,
+ .get_edid = anx7625_bridge_get_edid,
+};
+
+static int anx7625_register_i2c_dummy_clients(struct anx7625_data *ctx,
+ struct i2c_client *client)
+{
+ struct device *dev = &ctx->client->dev;
+
+ ctx->i2c.tx_p0_client = devm_i2c_new_dummy_device(dev, client->adapter,
+ TX_P0_ADDR >> 1);
+ if (IS_ERR(ctx->i2c.tx_p0_client))
+ return PTR_ERR(ctx->i2c.tx_p0_client);
+
+ ctx->i2c.tx_p1_client = devm_i2c_new_dummy_device(dev, client->adapter,
+ TX_P1_ADDR >> 1);
+ if (IS_ERR(ctx->i2c.tx_p1_client))
+ return PTR_ERR(ctx->i2c.tx_p1_client);
+
+ ctx->i2c.tx_p2_client = devm_i2c_new_dummy_device(dev, client->adapter,
+ TX_P2_ADDR >> 1);
+ if (IS_ERR(ctx->i2c.tx_p2_client))
+ return PTR_ERR(ctx->i2c.tx_p2_client);
+
+ ctx->i2c.rx_p0_client = devm_i2c_new_dummy_device(dev, client->adapter,
+ RX_P0_ADDR >> 1);
+ if (IS_ERR(ctx->i2c.rx_p0_client))
+ return PTR_ERR(ctx->i2c.rx_p0_client);
+
+ ctx->i2c.rx_p1_client = devm_i2c_new_dummy_device(dev, client->adapter,
+ RX_P1_ADDR >> 1);
+ if (IS_ERR(ctx->i2c.rx_p1_client))
+ return PTR_ERR(ctx->i2c.rx_p1_client);
+
+ ctx->i2c.rx_p2_client = devm_i2c_new_dummy_device(dev, client->adapter,
+ RX_P2_ADDR >> 1);
+ if (IS_ERR(ctx->i2c.rx_p2_client))
+ return PTR_ERR(ctx->i2c.rx_p2_client);
+
+ ctx->i2c.tcpc_client = devm_i2c_new_dummy_device(dev, client->adapter,
+ TCPC_INTERFACE_ADDR >> 1);
+ if (IS_ERR(ctx->i2c.tcpc_client))
+ return PTR_ERR(ctx->i2c.tcpc_client);
+
+ return 0;
+}
+
+static int __maybe_unused anx7625_runtime_pm_suspend(struct device *dev)
+{
+ struct anx7625_data *ctx = dev_get_drvdata(dev);
+
+ mutex_lock(&ctx->lock);
+
+ anx7625_stop_dp_work(ctx);
+ anx7625_power_standby(ctx);
+
+ mutex_unlock(&ctx->lock);
+
+ return 0;
+}
+
+static int __maybe_unused anx7625_runtime_pm_resume(struct device *dev)
+{
+ struct anx7625_data *ctx = dev_get_drvdata(dev);
+
+ mutex_lock(&ctx->lock);
+
+ anx7625_power_on_init(ctx);
+
+ mutex_unlock(&ctx->lock);
+
+ return 0;
+}
+
+static const struct dev_pm_ops anx7625_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(anx7625_runtime_pm_suspend,
+ anx7625_runtime_pm_resume, NULL)
+};
+
+static void anx7625_runtime_disable(void *data)
+{
+ pm_runtime_dont_use_autosuspend(data);
+ pm_runtime_disable(data);
+}
+
+static int anx7625_link_bridge(struct drm_dp_aux *aux)
+{
+ struct anx7625_data *platform = container_of(aux, struct anx7625_data, aux);
+ struct device *dev = aux->dev;
+ int ret;
+
+ ret = anx7625_parse_dt_panel(dev, &platform->pdata);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "fail to parse DT for panel : %d\n", ret);
+ return ret;
+ }
+
+ platform->bridge.funcs = &anx7625_bridge_funcs;
+ platform->bridge.of_node = dev->of_node;
+ if (!anx7625_of_panel_on_aux_bus(dev))
+ platform->bridge.ops |= DRM_BRIDGE_OP_EDID;
+ if (!platform->pdata.panel_bridge)
+ platform->bridge.ops |= DRM_BRIDGE_OP_HPD |
+ DRM_BRIDGE_OP_DETECT;
+ platform->bridge.type = platform->pdata.panel_bridge ?
+ DRM_MODE_CONNECTOR_eDP :
+ DRM_MODE_CONNECTOR_DisplayPort;
+
+ drm_bridge_add(&platform->bridge);
+
+ if (!platform->pdata.is_dpi) {
+ ret = anx7625_attach_dsi(platform);
+ if (ret)
+ drm_bridge_remove(&platform->bridge);
+ }
+
+ return ret;
+}
+
+static int anx7625_i2c_probe(struct i2c_client *client)
+{
+ struct anx7625_data *platform;
+ struct anx7625_platform_data *pdata;
+ int ret = 0;
+ struct device *dev = &client->dev;
+
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_I2C_BLOCK)) {
+ DRM_DEV_ERROR(dev, "anx7625's i2c bus doesn't support\n");
+ return -ENODEV;
+ }
+
+ platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL);
+ if (!platform) {
+ DRM_DEV_ERROR(dev, "fail to allocate driver data\n");
+ return -ENOMEM;
+ }
+
+ pdata = &platform->pdata;
+
+ platform->client = client;
+ i2c_set_clientdata(client, platform);
+
+ pdata->supplies[0].supply = "vdd10";
+ pdata->supplies[1].supply = "vdd18";
+ pdata->supplies[2].supply = "vdd33";
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pdata->supplies),
+ pdata->supplies);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "fail to get power supplies: %d\n", ret);
+ return ret;
+ }
+ anx7625_init_gpio(platform);
+
+ mutex_init(&platform->lock);
+ mutex_init(&platform->hdcp_wq_lock);
+ mutex_init(&platform->aux_lock);
+
+ INIT_DELAYED_WORK(&platform->hdcp_work, hdcp_check_work_func);
+ platform->hdcp_workqueue = create_workqueue("hdcp workqueue");
+ if (!platform->hdcp_workqueue) {
+ dev_err(dev, "fail to create work queue\n");
+ ret = -ENOMEM;
+ return ret;
+ }
+
+ platform->pdata.intp_irq = client->irq;
+ if (platform->pdata.intp_irq) {
+ INIT_WORK(&platform->work, anx7625_work_func);
+ platform->workqueue = alloc_workqueue("anx7625_work",
+ WQ_FREEZABLE | WQ_MEM_RECLAIM, 1);
+ if (!platform->workqueue) {
+ DRM_DEV_ERROR(dev, "fail to create work queue\n");
+ ret = -ENOMEM;
+ goto free_hdcp_wq;
+ }
+
+ ret = devm_request_threaded_irq(dev, platform->pdata.intp_irq,
+ NULL, anx7625_intr_hpd_isr,
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "anx7625-intp", platform);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "fail to request irq\n");
+ goto free_wq;
+ }
+ }
+
+ platform->aux.name = "anx7625-aux";
+ platform->aux.dev = dev;
+ platform->aux.transfer = anx7625_aux_transfer;
+ platform->aux.wait_hpd_asserted = anx7625_wait_hpd_asserted;
+ drm_dp_aux_init(&platform->aux);
+
+ ret = anx7625_parse_dt(dev, pdata);
+ if (ret) {
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev, "fail to parse DT : %d\n", ret);
+ goto free_wq;
+ }
+
+ if (!platform->pdata.is_dpi) {
+ ret = anx7625_setup_dsi_device(platform);
+ if (ret < 0)
+ goto free_wq;
+ }
+
+ /*
+ * Registering the i2c devices will retrigger deferred probe, so it
+ * needs to be done after calls that might return EPROBE_DEFER,
+ * otherwise we can get an infinite loop.
+ */
+ if (anx7625_register_i2c_dummy_clients(platform, client) != 0) {
+ ret = -ENOMEM;
+ DRM_DEV_ERROR(dev, "fail to reserve I2C bus.\n");
+ goto free_wq;
+ }
+
+ pm_runtime_enable(dev);
+ pm_runtime_set_autosuspend_delay(dev, 1000);
+ pm_runtime_use_autosuspend(dev);
+ pm_suspend_ignore_children(dev, true);
+ ret = devm_add_action_or_reset(dev, anx7625_runtime_disable, dev);
+ if (ret)
+ goto free_wq;
+
+ /*
+ * Populating the aux bus will retrigger deferred probe, so it needs to
+ * be done after calls that might return EPROBE_DEFER, otherwise we can
+ * get an infinite loop.
+ */
+ ret = devm_of_dp_aux_populate_bus(&platform->aux, anx7625_link_bridge);
+ if (ret) {
+ if (ret != -ENODEV) {
+ DRM_DEV_ERROR(dev, "failed to populate aux bus : %d\n", ret);
+ goto free_wq;
+ }
+
+ ret = anx7625_link_bridge(&platform->aux);
+ if (ret)
+ goto free_wq;
+ }
+
+ if (!platform->pdata.low_power_mode) {
+ anx7625_disable_pd_protocol(platform);
+ pm_runtime_get_sync(dev);
+ _anx7625_hpd_polling(platform, 5000 * 100);
+ }
+
+ /* Add work function */
+ if (platform->pdata.intp_irq)
+ queue_work(platform->workqueue, &platform->work);
+
+ if (platform->pdata.audio_en)
+ anx7625_register_audio(dev, platform);
+
+ DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
+
+ return 0;
+
+free_wq:
+ if (platform->workqueue)
+ destroy_workqueue(platform->workqueue);
+
+free_hdcp_wq:
+ if (platform->hdcp_workqueue)
+ destroy_workqueue(platform->hdcp_workqueue);
+
+ return ret;
+}
+
+static void anx7625_i2c_remove(struct i2c_client *client)
+{
+ struct anx7625_data *platform = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&platform->bridge);
+
+ if (platform->pdata.intp_irq)
+ destroy_workqueue(platform->workqueue);
+
+ if (platform->hdcp_workqueue) {
+ cancel_delayed_work(&platform->hdcp_work);
+ flush_workqueue(platform->hdcp_workqueue);
+ destroy_workqueue(platform->hdcp_workqueue);
+ }
+
+ if (!platform->pdata.low_power_mode)
+ pm_runtime_put_sync_suspend(&client->dev);
+
+ if (platform->pdata.audio_en)
+ anx7625_unregister_audio(platform);
+}
+
+static const struct i2c_device_id anx7625_id[] = {
+ {"anx7625", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, anx7625_id);
+
+static const struct of_device_id anx_match_table[] = {
+ {.compatible = "analogix,anx7625",},
+ {},
+};
+MODULE_DEVICE_TABLE(of, anx_match_table);
+
+static struct i2c_driver anx7625_driver = {
+ .driver = {
+ .name = "anx7625",
+ .of_match_table = anx_match_table,
+ .pm = &anx7625_pm_ops,
+ },
+ .probe_new = anx7625_i2c_probe,
+ .remove = anx7625_i2c_remove,
+
+ .id_table = anx7625_id,
+};
+
+module_i2c_driver(anx7625_driver);
+
+MODULE_DESCRIPTION("MIPI2DP anx7625 driver");
+MODULE_AUTHOR("Xin Ji <xji@analogixsemi.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION(ANX7625_DRV_VERSION);
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
new file mode 100644
index 000000000..239956199
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
@@ -0,0 +1,486 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright(c) 2020, Analogix Semiconductor. All rights reserved.
+ *
+ */
+
+#ifndef __ANX7625_H__
+#define __ANX7625_H__
+
+#define ANX7625_DRV_VERSION "0.1.04"
+
+/* Loading OCM re-trying times */
+#define OCM_LOADING_TIME 10
+
+/********* ANX7625 Register **********/
+#define TX_P0_ADDR 0x70
+#define TX_P1_ADDR 0x7A
+#define TX_P2_ADDR 0x72
+
+#define RX_P0_ADDR 0x7e
+#define RX_P1_ADDR 0x84
+#define RX_P2_ADDR 0x54
+
+#define RSVD_00_ADDR 0x00
+#define RSVD_D1_ADDR 0xD1
+#define RSVD_60_ADDR 0x60
+#define RSVD_39_ADDR 0x39
+#define RSVD_7F_ADDR 0x7F
+
+#define TCPC_INTERFACE_ADDR 0x58
+
+/* Clock frequency in Hz */
+#define XTAL_FRQ (27 * 1000000)
+
+#define POST_DIVIDER_MIN 1
+#define POST_DIVIDER_MAX 16
+#define PLL_OUT_FREQ_MIN 520000000UL
+#define PLL_OUT_FREQ_MAX 730000000UL
+#define PLL_OUT_FREQ_ABS_MIN 300000000UL
+#define PLL_OUT_FREQ_ABS_MAX 800000000UL
+#define MAX_UNSIGNED_24BIT 16777215UL
+
+/***************************************************************/
+/* Register definition of device address 0x58 */
+
+#define PRODUCT_ID_L 0x02
+#define PRODUCT_ID_H 0x03
+
+#define INTR_ALERT_1 0xCC
+#define INTR_SOFTWARE_INT BIT(3)
+#define INTR_RECEIVED_MSG BIT(5)
+
+#define SYSTEM_STSTUS 0x45
+#define INTERFACE_CHANGE_INT 0x44
+#define HPD_STATUS_CHANGE 0x80
+#define HPD_STATUS 0x80
+
+/******** END of I2C Address 0x58 ********/
+
+/***************************************************************/
+/* Register definition of device address 0x70 */
+#define TX_HDCP_CTRL0 0x01
+#define STORE_AN BIT(7)
+#define RX_REPEATER BIT(6)
+#define RE_AUTHEN BIT(5)
+#define SW_AUTH_OK BIT(4)
+#define HARD_AUTH_EN BIT(3)
+#define ENC_EN BIT(2)
+#define BKSV_SRM_PASS BIT(1)
+#define KSVLIST_VLD BIT(0)
+
+#define SP_TX_WAIT_R0_TIME 0x40
+#define SP_TX_WAIT_KSVR_TIME 0x42
+#define SP_TX_SYS_CTRL1_REG 0x80
+#define HDCP2TX_FW_EN BIT(4)
+
+#define SP_TX_LINK_BW_SET_REG 0xA0
+#define SP_TX_LANE_COUNT_SET_REG 0xA1
+
+#define M_VID_0 0xC0
+#define M_VID_1 0xC1
+#define M_VID_2 0xC2
+#define N_VID_0 0xC3
+#define N_VID_1 0xC4
+#define N_VID_2 0xC5
+
+#define KEY_START_ADDR 0x9000
+#define KEY_RESERVED 416
+
+#define HDCP14KEY_START_ADDR (KEY_START_ADDR + KEY_RESERVED)
+#define HDCP14KEY_SIZE 624
+
+/***************************************************************/
+/* Register definition of device address 0x72 */
+#define AUX_RST 0x04
+#define RST_CTRL2 0x07
+
+#define SP_TX_TOTAL_LINE_STA_L 0x24
+#define SP_TX_TOTAL_LINE_STA_H 0x25
+#define SP_TX_ACT_LINE_STA_L 0x26
+#define SP_TX_ACT_LINE_STA_H 0x27
+#define SP_TX_V_F_PORCH_STA 0x28
+#define SP_TX_V_SYNC_STA 0x29
+#define SP_TX_V_B_PORCH_STA 0x2A
+#define SP_TX_TOTAL_PIXEL_STA_L 0x2B
+#define SP_TX_TOTAL_PIXEL_STA_H 0x2C
+#define SP_TX_ACT_PIXEL_STA_L 0x2D
+#define SP_TX_ACT_PIXEL_STA_H 0x2E
+#define SP_TX_H_F_PORCH_STA_L 0x2F
+#define SP_TX_H_F_PORCH_STA_H 0x30
+#define SP_TX_H_SYNC_STA_L 0x31
+#define SP_TX_H_SYNC_STA_H 0x32
+#define SP_TX_H_B_PORCH_STA_L 0x33
+#define SP_TX_H_B_PORCH_STA_H 0x34
+
+#define SP_TX_VID_CTRL 0x84
+#define SP_TX_BPC_MASK 0xE0
+#define SP_TX_BPC_6 0x00
+#define SP_TX_BPC_8 0x20
+#define SP_TX_BPC_10 0x40
+#define SP_TX_BPC_12 0x60
+
+#define VIDEO_BIT_MATRIX_12 0x4c
+
+#define AUDIO_CHANNEL_STATUS_1 0xd0
+#define AUDIO_CHANNEL_STATUS_2 0xd1
+#define AUDIO_CHANNEL_STATUS_3 0xd2
+#define AUDIO_CHANNEL_STATUS_4 0xd3
+#define AUDIO_CHANNEL_STATUS_5 0xd4
+#define AUDIO_CHANNEL_STATUS_6 0xd5
+#define TDM_SLAVE_MODE 0x10
+#define I2S_SLAVE_MODE 0x08
+#define AUDIO_LAYOUT 0x01
+
+#define HPD_DET_TIMER_BIT0_7 0xea
+#define HPD_DET_TIMER_BIT8_15 0xeb
+#define HPD_DET_TIMER_BIT16_23 0xec
+/* HPD debounce time 2ms for 27M clock */
+#define HPD_TIME 54000
+
+#define AUDIO_CONTROL_REGISTER 0xe6
+#define TDM_TIMING_MODE 0x08
+
+#define I2C_ADDR_72_DPTX 0x72
+
+#define HP_MIN 8
+#define HBLANKING_MIN 80
+#define SYNC_LEN_DEF 32
+#define HFP_HBP_DEF ((HBLANKING_MIN - SYNC_LEN_DEF) / 2)
+#define VIDEO_CONTROL_0 0x08
+
+#define ACTIVE_LINES_L 0x14
+#define ACTIVE_LINES_H 0x15 /* Bit[7:6] are reserved */
+#define VERTICAL_FRONT_PORCH 0x16
+#define VERTICAL_SYNC_WIDTH 0x17
+#define VERTICAL_BACK_PORCH 0x18
+
+#define HORIZONTAL_TOTAL_PIXELS_L 0x19
+#define HORIZONTAL_TOTAL_PIXELS_H 0x1A /* Bit[7:6] are reserved */
+#define HORIZONTAL_ACTIVE_PIXELS_L 0x1B
+#define HORIZONTAL_ACTIVE_PIXELS_H 0x1C /* Bit[7:6] are reserved */
+#define HORIZONTAL_FRONT_PORCH_L 0x1D
+#define HORIZONTAL_FRONT_PORCH_H 0x1E /* Bit[7:4] are reserved */
+#define HORIZONTAL_SYNC_WIDTH_L 0x1F
+#define HORIZONTAL_SYNC_WIDTH_H 0x20 /* Bit[7:4] are reserved */
+#define HORIZONTAL_BACK_PORCH_L 0x21
+#define HORIZONTAL_BACK_PORCH_H 0x22 /* Bit[7:4] are reserved */
+
+/******** END of I2C Address 0x72 *********/
+
+/***************************************************************/
+/* Register definition of device address 0x7a */
+#define DP_TX_SWING_REG_CNT 0x14
+#define DP_TX_LANE0_SWING_REG0 0x00
+#define DP_TX_LANE1_SWING_REG0 0x14
+/******** END of I2C Address 0x7a *********/
+
+/***************************************************************/
+/* Register definition of device address 0x7e */
+
+#define I2C_ADDR_7E_FLASH_CONTROLLER 0x7E
+
+#define R_BOOT_RETRY 0x00
+#define R_RAM_ADDR_H 0x01
+#define R_RAM_ADDR_L 0x02
+#define R_RAM_LEN_H 0x03
+#define R_RAM_LEN_L 0x04
+#define FLASH_LOAD_STA 0x05
+#define FLASH_LOAD_STA_CHK BIT(7)
+
+#define R_RAM_CTRL 0x05
+/* bit positions */
+#define FLASH_DONE BIT(7)
+#define BOOT_LOAD_DONE BIT(6)
+#define CRC_OK BIT(5)
+#define LOAD_DONE BIT(4)
+#define O_RW_DONE BIT(3)
+#define FUSE_BUSY BIT(2)
+#define DECRYPT_EN BIT(1)
+#define LOAD_START BIT(0)
+
+#define FLASH_ADDR_HIGH 0x0F
+#define FLASH_ADDR_LOW 0x10
+#define FLASH_LEN_HIGH 0x31
+#define FLASH_LEN_LOW 0x32
+#define R_FLASH_RW_CTRL 0x33
+/* bit positions */
+#define READ_DELAY_SELECT BIT(7)
+#define GENERAL_INSTRUCTION_EN BIT(6)
+#define FLASH_ERASE_EN BIT(5)
+#define RDID_READ_EN BIT(4)
+#define REMS_READ_EN BIT(3)
+#define WRITE_STATUS_EN BIT(2)
+#define FLASH_READ BIT(1)
+#define FLASH_WRITE BIT(0)
+
+#define FLASH_BUF_BASE_ADDR 0x60
+#define FLASH_BUF_LEN 0x20
+
+#define XTAL_FRQ_SEL 0x3F
+/* bit field positions */
+#define XTAL_FRQ_SEL_POS 5
+/* bit field values */
+#define XTAL_FRQ_19M2 (0 << XTAL_FRQ_SEL_POS)
+#define XTAL_FRQ_27M (4 << XTAL_FRQ_SEL_POS)
+
+#define R_DSC_CTRL_0 0x40
+#define READ_STATUS_EN 7
+#define CLK_1MEG_RB 6 /* 1MHz clock reset; 0=reset, 0=reset release */
+#define DSC_BIST_DONE 1 /* Bit[5:1]: 1=DSC MBIST pass */
+#define DSC_EN 0x01 /* 1=DSC enabled, 0=DSC disabled */
+
+#define OCM_FW_VERSION 0x31
+#define OCM_FW_REVERSION 0x32
+
+#define AP_AUX_ADDR_7_0 0x11
+#define AP_AUX_ADDR_15_8 0x12
+#define AP_AUX_ADDR_19_16 0x13
+
+/* Bit[0:3] AUX status, bit 4 op_en, bit 5 address only */
+#define AP_AUX_CTRL_STATUS 0x14
+#define AP_AUX_CTRL_OP_EN 0x10
+#define AP_AUX_CTRL_ADDRONLY 0x20
+
+#define AP_AUX_BUFF_START 0x15
+#define PIXEL_CLOCK_L 0x25
+#define PIXEL_CLOCK_H 0x26
+
+#define AP_AUX_COMMAND 0x27 /* com+len */
+#define LENGTH_SHIFT 4
+#define DPCD_CMD(len, cmd) ((((len) - 1) << LENGTH_SHIFT) | (cmd))
+
+/* Bit 0&1: 3D video structure */
+/* 0x01: frame packing, 0x02:Line alternative, 0x03:Side-by-side(full) */
+#define AP_AV_STATUS 0x28
+#define AP_VIDEO_CHG BIT(2)
+#define AP_AUDIO_CHG BIT(3)
+#define AP_MIPI_MUTE BIT(4) /* 1:MIPI input mute, 0: ummute */
+#define AP_MIPI_RX_EN BIT(5) /* 1: MIPI RX input in 0: no RX in */
+#define AP_DISABLE_PD BIT(6)
+#define AP_DISABLE_DISPLAY BIT(7)
+/***************************************************************/
+/* Register definition of device address 0x84 */
+#define MIPI_PHY_CONTROL_3 0x03
+#define MIPI_HS_PWD_CLK 7
+#define MIPI_HS_RT_CLK 6
+#define MIPI_PD_CLK 5
+#define MIPI_CLK_RT_MANUAL_PD_EN 4
+#define MIPI_CLK_HS_MANUAL_PD_EN 3
+#define MIPI_CLK_DET_DET_BYPASS 2
+#define MIPI_CLK_MISS_CTRL 1
+#define MIPI_PD_LPTX_CH_MANUAL_PD_EN 0
+
+#define MIPI_LANE_CTRL_0 0x05
+#define MIPI_TIME_HS_PRPR 0x08
+
+/*
+ * After MIPI RX protocol layer received video frames,
+ * Protocol layer starts to reconstruct video stream from PHY
+ */
+#define MIPI_VIDEO_STABLE_CNT 0x0A
+
+#define MIPI_LANE_CTRL_10 0x0F
+#define MIPI_DIGITAL_ADJ_1 0x1B
+#define IVO_MID0 0x26
+#define IVO_MID1 0xCF
+
+#define MIPI_PLL_M_NUM_23_16 0x1E
+#define MIPI_PLL_M_NUM_15_8 0x1F
+#define MIPI_PLL_M_NUM_7_0 0x20
+#define MIPI_PLL_N_NUM_23_16 0x21
+#define MIPI_PLL_N_NUM_15_8 0x22
+#define MIPI_PLL_N_NUM_7_0 0x23
+
+#define MIPI_DIGITAL_PLL_6 0x2A
+/* Bit[7:6]: VCO band control, only effective */
+#define MIPI_M_NUM_READY 0x10
+#define MIPI_N_NUM_READY 0x08
+#define STABLE_INTEGER_CNT_EN 0x04
+#define MIPI_PLL_TEST_BIT 0
+/* Bit[1:0]: test point output select - */
+/* 00: VCO power, 01: dvdd_pdt, 10: dvdd, 11: vcox */
+
+#define MIPI_DIGITAL_PLL_7 0x2B
+#define MIPI_PLL_FORCE_N_EN 7
+#define MIPI_PLL_FORCE_BAND_EN 6
+
+#define MIPI_PLL_VCO_TUNE_REG 4
+/* Bit[5:4]: VCO metal capacitance - */
+/* 00: +20% fast, 01: +10% fast (default), 10: typical, 11: -10% slow */
+#define MIPI_PLL_VCO_TUNE_REG_VAL 0x30
+
+#define MIPI_PLL_PLL_LDO_BIT 2
+/* Bit[3:2]: vco_v2i power - */
+/* 00: 1.40V, 01: 1.45V (default), 10: 1.50V, 11: 1.55V */
+#define MIPI_PLL_RESET_N 0x02
+#define MIPI_FRQ_FORCE_NDET 0
+
+#define MIPI_ALERT_CLR_0 0x2D
+#define HS_link_error_clear 7
+/* This bit itself is S/C, and it clears 0x84:0x31[7] */
+
+#define MIPI_ALERT_OUT_0 0x31
+#define check_sum_err_hs_sync 7
+/* This bit is cleared by 0x84:0x2D[7] */
+
+#define MIPI_DIGITAL_PLL_8 0x33
+#define MIPI_POST_DIV_VAL 4
+/* N means divided by (n+1), n = 0~15 */
+#define MIPI_EN_LOCK_FRZ 3
+#define MIPI_FRQ_COUNTER_RST 2
+#define MIPI_FRQ_SET_REG_8 1
+/* Bit 0 is reserved */
+
+#define MIPI_DIGITAL_PLL_9 0x34
+
+#define MIPI_DIGITAL_PLL_16 0x3B
+#define MIPI_FRQ_FREEZE_NDET 7
+#define MIPI_FRQ_REG_SET_ENABLE 6
+#define MIPI_REG_FORCE_SEL_EN 5
+#define MIPI_REG_SEL_DIV_REG 4
+#define MIPI_REG_FORCE_PRE_DIV_EN 3
+/* Bit 2 is reserved */
+#define MIPI_FREF_D_IND 1
+#define REF_CLK_27000KHZ 1
+#define REF_CLK_19200KHZ 0
+#define MIPI_REG_PLL_PLL_TEST_ENABLE 0
+
+#define MIPI_DIGITAL_PLL_18 0x3D
+#define FRQ_COUNT_RB_SEL 7
+#define REG_FORCE_POST_DIV_EN 6
+#define MIPI_DPI_SELECT 5
+#define SELECT_DSI 1
+#define SELECT_DPI 0
+#define REG_BAUD_DIV_RATIO 0
+
+#define H_BLANK_L 0x3E
+/* For DSC only */
+#define H_BLANK_H 0x3F
+/* For DSC only; note: bit[7:6] are reserved */
+#define MIPI_SWAP 0x4A
+#define MIPI_SWAP_CH0 7
+#define MIPI_SWAP_CH1 6
+#define MIPI_SWAP_CH2 5
+#define MIPI_SWAP_CH3 4
+#define MIPI_SWAP_CLK 3
+/* Bit[2:0] are reserved */
+
+/******** END of I2C Address 0x84 *********/
+
+/* DPCD regs */
+#define DPCD_DPCD_REV 0x00
+#define DPCD_MAX_LINK_RATE 0x01
+#define DPCD_MAX_LANE_COUNT 0x02
+
+/********* ANX7625 Register End **********/
+
+/***************** Display *****************/
+enum audio_fs {
+ AUDIO_FS_441K = 0x00,
+ AUDIO_FS_48K = 0x02,
+ AUDIO_FS_32K = 0x03,
+ AUDIO_FS_882K = 0x08,
+ AUDIO_FS_96K = 0x0a,
+ AUDIO_FS_1764K = 0x0c,
+ AUDIO_FS_192K = 0x0e
+};
+
+enum audio_wd_len {
+ AUDIO_W_LEN_16_20MAX = 0x02,
+ AUDIO_W_LEN_18_20MAX = 0x04,
+ AUDIO_W_LEN_17_20MAX = 0x0c,
+ AUDIO_W_LEN_19_20MAX = 0x08,
+ AUDIO_W_LEN_20_20MAX = 0x0a,
+ AUDIO_W_LEN_20_24MAX = 0x03,
+ AUDIO_W_LEN_22_24MAX = 0x05,
+ AUDIO_W_LEN_21_24MAX = 0x0d,
+ AUDIO_W_LEN_23_24MAX = 0x09,
+ AUDIO_W_LEN_24_24MAX = 0x0b
+};
+
+#define I2S_CH_2 0x01
+#define TDM_CH_4 0x03
+#define TDM_CH_6 0x05
+#define TDM_CH_8 0x07
+
+#define MAX_DPCD_BUFFER_SIZE 16
+
+#define ONE_BLOCK_SIZE 128
+#define FOUR_BLOCK_SIZE (128 * 4)
+
+#define MAX_EDID_BLOCK 3
+#define EDID_TRY_CNT 3
+#define SUPPORT_PIXEL_CLOCK 300000
+
+struct s_edid_data {
+ int edid_block_num;
+ u8 edid_raw_data[FOUR_BLOCK_SIZE];
+};
+
+/***************** Display End *****************/
+
+#define MAX_LANES_SUPPORT 4
+
+struct anx7625_platform_data {
+ struct gpio_desc *gpio_p_on;
+ struct gpio_desc *gpio_reset;
+ struct regulator_bulk_data supplies[3];
+ struct drm_bridge *panel_bridge;
+ int intp_irq;
+ int is_dpi;
+ int mipi_lanes;
+ int audio_en;
+ int dp_lane0_swing_reg_cnt;
+ u8 lane0_reg_data[DP_TX_SWING_REG_CNT];
+ int dp_lane1_swing_reg_cnt;
+ u8 lane1_reg_data[DP_TX_SWING_REG_CNT];
+ u32 low_power_mode;
+ struct device_node *mipi_host_node;
+};
+
+struct anx7625_i2c_client {
+ struct i2c_client *tx_p0_client;
+ struct i2c_client *tx_p1_client;
+ struct i2c_client *tx_p2_client;
+ struct i2c_client *rx_p0_client;
+ struct i2c_client *rx_p1_client;
+ struct i2c_client *rx_p2_client;
+ struct i2c_client *tcpc_client;
+};
+
+struct anx7625_data {
+ struct anx7625_platform_data pdata;
+ struct platform_device *audio_pdev;
+ int hpd_status;
+ int hpd_high_cnt;
+ int dp_en;
+ int hdcp_cp;
+ /* Lock for work queue */
+ struct mutex lock;
+ struct i2c_client *client;
+ struct anx7625_i2c_client i2c;
+ struct i2c_client *last_client;
+ struct timer_list hdcp_timer;
+ struct s_edid_data slimport_edid_p;
+ struct device *codec_dev;
+ hdmi_codec_plugged_cb plugged_cb;
+ struct work_struct work;
+ struct workqueue_struct *workqueue;
+ struct delayed_work hdcp_work;
+ struct workqueue_struct *hdcp_workqueue;
+ /* Lock for hdcp work queue */
+ struct mutex hdcp_wq_lock;
+ /* Lock for aux transfer and disable */
+ struct mutex aux_lock;
+ char edid_block;
+ struct display_timing dt;
+ u8 display_timing_valid;
+ struct drm_bridge bridge;
+ u8 bridge_attached;
+ struct drm_connector *connector;
+ struct mipi_dsi_device *dsi;
+ struct drm_dp_aux aux;
+};
+
+#endif /* __ANX7625_H__ */
diff --git a/drivers/gpu/drm/bridge/cadence/Kconfig b/drivers/gpu/drm/bridge/cadence/Kconfig
new file mode 100644
index 000000000..1d06182be
--- /dev/null
+++ b/drivers/gpu/drm/bridge/cadence/Kconfig
@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config DRM_CDNS_MHDP8546
+ tristate "Cadence DPI/DP bridge"
+ select DRM_DISPLAY_DP_HELPER
+ select DRM_DISPLAY_HDCP_HELPER
+ select DRM_DISPLAY_HELPER
+ select DRM_KMS_HELPER
+ select DRM_PANEL_BRIDGE
+ depends on OF
+ help
+ Support Cadence DPI to DP bridge. This is an internal
+ bridge and is meant to be directly embedded in a SoC.
+ It takes a DPI stream as input and outputs it encoded
+ in DP format.
+
+if DRM_CDNS_MHDP8546
+
+config DRM_CDNS_MHDP8546_J721E
+ depends on ARCH_K3 || COMPILE_TEST
+ bool "J721E Cadence DPI/DP wrapper support"
+ default y
+ help
+ Support J721E Cadence DPI/DP wrapper. This is a wrapper
+ which adds support for J721E related platform ops. It
+ initializes the J721E Display Port and sets up the
+ clock and data muxes.
+endif
diff --git a/drivers/gpu/drm/bridge/cadence/Makefile b/drivers/gpu/drm/bridge/cadence/Makefile
new file mode 100644
index 000000000..4d2db8df1
--- /dev/null
+++ b/drivers/gpu/drm/bridge/cadence/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_DRM_CDNS_MHDP8546) += cdns-mhdp8546.o
+cdns-mhdp8546-y := cdns-mhdp8546-core.o cdns-mhdp8546-hdcp.o
+cdns-mhdp8546-$(CONFIG_DRM_CDNS_MHDP8546_J721E) += cdns-mhdp8546-j721e.o
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
new file mode 100644
index 000000000..31442a922
--- /dev/null
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
@@ -0,0 +1,2649 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Cadence MHDP8546 DP bridge driver.
+ *
+ * Copyright (C) 2020 Cadence Design Systems, Inc.
+ *
+ * Authors: Quentin Schulz <quentin.schulz@free-electrons.com>
+ * Swapnil Jakhade <sjakhade@cadence.com>
+ * Yuti Amonkar <yamonkar@cadence.com>
+ * Tomi Valkeinen <tomi.valkeinen@ti.com>
+ * Jyri Sarha <jsarha@ti.com>
+ *
+ * TODO:
+ * - Implement optimized mailbox communication using mailbox interrupts
+ * - Add support for power management
+ * - Add support for features like audio, MST and fast link training
+ * - Implement request_fw_cancel to handle HW_STATE
+ * - Fix asynchronous loading of firmware implementation
+ * - Add DRM helper function for cdns_mhdp_lower_link_rate
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/firmware.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/irq.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/phy/phy-dp.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/wait.h>
+
+#include <drm/display/drm_dp_helper.h>
+#include <drm/display/drm_hdcp_helper.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_atomic_state_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_modeset_helper_vtables.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include <asm/unaligned.h>
+
+#include "cdns-mhdp8546-core.h"
+#include "cdns-mhdp8546-hdcp.h"
+#include "cdns-mhdp8546-j721e.h"
+
+static int cdns_mhdp_mailbox_read(struct cdns_mhdp_device *mhdp)
+{
+ int ret, empty;
+
+ WARN_ON(!mutex_is_locked(&mhdp->mbox_mutex));
+
+ ret = readx_poll_timeout(readl, mhdp->regs + CDNS_MAILBOX_EMPTY,
+ empty, !empty, MAILBOX_RETRY_US,
+ MAILBOX_TIMEOUT_US);
+ if (ret < 0)
+ return ret;
+
+ return readl(mhdp->regs + CDNS_MAILBOX_RX_DATA) & 0xff;
+}
+
+static int cdns_mhdp_mailbox_write(struct cdns_mhdp_device *mhdp, u8 val)
+{
+ int ret, full;
+
+ WARN_ON(!mutex_is_locked(&mhdp->mbox_mutex));
+
+ ret = readx_poll_timeout(readl, mhdp->regs + CDNS_MAILBOX_FULL,
+ full, !full, MAILBOX_RETRY_US,
+ MAILBOX_TIMEOUT_US);
+ if (ret < 0)
+ return ret;
+
+ writel(val, mhdp->regs + CDNS_MAILBOX_TX_DATA);
+
+ return 0;
+}
+
+static int cdns_mhdp_mailbox_recv_header(struct cdns_mhdp_device *mhdp,
+ u8 module_id, u8 opcode,
+ u16 req_size)
+{
+ u32 mbox_size, i;
+ u8 header[4];
+ int ret;
+
+ /* read the header of the message */
+ for (i = 0; i < sizeof(header); i++) {
+ ret = cdns_mhdp_mailbox_read(mhdp);
+ if (ret < 0)
+ return ret;
+
+ header[i] = ret;
+ }
+
+ mbox_size = get_unaligned_be16(header + 2);
+
+ if (opcode != header[0] || module_id != header[1] ||
+ req_size != mbox_size) {
+ /*
+ * If the message in mailbox is not what we want, we need to
+ * clear the mailbox by reading its contents.
+ */
+ for (i = 0; i < mbox_size; i++)
+ if (cdns_mhdp_mailbox_read(mhdp) < 0)
+ break;
+
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int cdns_mhdp_mailbox_recv_data(struct cdns_mhdp_device *mhdp,
+ u8 *buff, u16 buff_size)
+{
+ u32 i;
+ int ret;
+
+ for (i = 0; i < buff_size; i++) {
+ ret = cdns_mhdp_mailbox_read(mhdp);
+ if (ret < 0)
+ return ret;
+
+ buff[i] = ret;
+ }
+
+ return 0;
+}
+
+static int cdns_mhdp_mailbox_send(struct cdns_mhdp_device *mhdp, u8 module_id,
+ u8 opcode, u16 size, u8 *message)
+{
+ u8 header[4];
+ int ret, i;
+
+ header[0] = opcode;
+ header[1] = module_id;
+ put_unaligned_be16(size, header + 2);
+
+ for (i = 0; i < sizeof(header); i++) {
+ ret = cdns_mhdp_mailbox_write(mhdp, header[i]);
+ if (ret)
+ return ret;
+ }
+
+ for (i = 0; i < size; i++) {
+ ret = cdns_mhdp_mailbox_write(mhdp, message[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static
+int cdns_mhdp_reg_read(struct cdns_mhdp_device *mhdp, u32 addr, u32 *value)
+{
+ u8 msg[4], resp[8];
+ int ret;
+
+ put_unaligned_be32(addr, msg);
+
+ mutex_lock(&mhdp->mbox_mutex);
+
+ ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_GENERAL,
+ GENERAL_REGISTER_READ,
+ sizeof(msg), msg);
+ if (ret)
+ goto out;
+
+ ret = cdns_mhdp_mailbox_recv_header(mhdp, MB_MODULE_ID_GENERAL,
+ GENERAL_REGISTER_READ,
+ sizeof(resp));
+ if (ret)
+ goto out;
+
+ ret = cdns_mhdp_mailbox_recv_data(mhdp, resp, sizeof(resp));
+ if (ret)
+ goto out;
+
+ /* Returned address value should be the same as requested */
+ if (memcmp(msg, resp, sizeof(msg))) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ *value = get_unaligned_be32(resp + 4);
+
+out:
+ mutex_unlock(&mhdp->mbox_mutex);
+ if (ret) {
+ dev_err(mhdp->dev, "Failed to read register\n");
+ *value = 0;
+ }
+
+ return ret;
+}
+
+static
+int cdns_mhdp_reg_write(struct cdns_mhdp_device *mhdp, u16 addr, u32 val)
+{
+ u8 msg[6];
+ int ret;
+
+ put_unaligned_be16(addr, msg);
+ put_unaligned_be32(val, msg + 2);
+
+ mutex_lock(&mhdp->mbox_mutex);
+
+ ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX,
+ DPTX_WRITE_REGISTER, sizeof(msg), msg);
+
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ return ret;
+}
+
+static
+int cdns_mhdp_reg_write_bit(struct cdns_mhdp_device *mhdp, u16 addr,
+ u8 start_bit, u8 bits_no, u32 val)
+{
+ u8 field[8];
+ int ret;
+
+ put_unaligned_be16(addr, field);
+ field[2] = start_bit;
+ field[3] = bits_no;
+ put_unaligned_be32(val, field + 4);
+
+ mutex_lock(&mhdp->mbox_mutex);
+
+ ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX,
+ DPTX_WRITE_FIELD, sizeof(field), field);
+
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ return ret;
+}
+
+static
+int cdns_mhdp_dpcd_read(struct cdns_mhdp_device *mhdp,
+ u32 addr, u8 *data, u16 len)
+{
+ u8 msg[5], reg[5];
+ int ret;
+
+ put_unaligned_be16(len, msg);
+ put_unaligned_be24(addr, msg + 2);
+
+ mutex_lock(&mhdp->mbox_mutex);
+
+ ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX,
+ DPTX_READ_DPCD, sizeof(msg), msg);
+ if (ret)
+ goto out;
+
+ ret = cdns_mhdp_mailbox_recv_header(mhdp, MB_MODULE_ID_DP_TX,
+ DPTX_READ_DPCD,
+ sizeof(reg) + len);
+ if (ret)
+ goto out;
+
+ ret = cdns_mhdp_mailbox_recv_data(mhdp, reg, sizeof(reg));
+ if (ret)
+ goto out;
+
+ ret = cdns_mhdp_mailbox_recv_data(mhdp, data, len);
+
+out:
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ return ret;
+}
+
+static
+int cdns_mhdp_dpcd_write(struct cdns_mhdp_device *mhdp, u32 addr, u8 value)
+{
+ u8 msg[6], reg[5];
+ int ret;
+
+ put_unaligned_be16(1, msg);
+ put_unaligned_be24(addr, msg + 2);
+ msg[5] = value;
+
+ mutex_lock(&mhdp->mbox_mutex);
+
+ ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX,
+ DPTX_WRITE_DPCD, sizeof(msg), msg);
+ if (ret)
+ goto out;
+
+ ret = cdns_mhdp_mailbox_recv_header(mhdp, MB_MODULE_ID_DP_TX,
+ DPTX_WRITE_DPCD, sizeof(reg));
+ if (ret)
+ goto out;
+
+ ret = cdns_mhdp_mailbox_recv_data(mhdp, reg, sizeof(reg));
+ if (ret)
+ goto out;
+
+ if (addr != get_unaligned_be24(reg + 2))
+ ret = -EINVAL;
+
+out:
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ if (ret)
+ dev_err(mhdp->dev, "dpcd write failed: %d\n", ret);
+ return ret;
+}
+
+static
+int cdns_mhdp_set_firmware_active(struct cdns_mhdp_device *mhdp, bool enable)
+{
+ u8 msg[5];
+ int ret, i;
+
+ msg[0] = GENERAL_MAIN_CONTROL;
+ msg[1] = MB_MODULE_ID_GENERAL;
+ msg[2] = 0;
+ msg[3] = 1;
+ msg[4] = enable ? FW_ACTIVE : FW_STANDBY;
+
+ mutex_lock(&mhdp->mbox_mutex);
+
+ for (i = 0; i < sizeof(msg); i++) {
+ ret = cdns_mhdp_mailbox_write(mhdp, msg[i]);
+ if (ret)
+ goto out;
+ }
+
+ /* read the firmware state */
+ ret = cdns_mhdp_mailbox_recv_data(mhdp, msg, sizeof(msg));
+ if (ret)
+ goto out;
+
+ ret = 0;
+
+out:
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ if (ret < 0)
+ dev_err(mhdp->dev, "set firmware active failed\n");
+ return ret;
+}
+
+static
+int cdns_mhdp_get_hpd_status(struct cdns_mhdp_device *mhdp)
+{
+ u8 status;
+ int ret;
+
+ mutex_lock(&mhdp->mbox_mutex);
+
+ ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX,
+ DPTX_HPD_STATE, 0, NULL);
+ if (ret)
+ goto err_get_hpd;
+
+ ret = cdns_mhdp_mailbox_recv_header(mhdp, MB_MODULE_ID_DP_TX,
+ DPTX_HPD_STATE,
+ sizeof(status));
+ if (ret)
+ goto err_get_hpd;
+
+ ret = cdns_mhdp_mailbox_recv_data(mhdp, &status, sizeof(status));
+ if (ret)
+ goto err_get_hpd;
+
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ dev_dbg(mhdp->dev, "%s: HPD %splugged\n", __func__,
+ status ? "" : "un");
+
+ return status;
+
+err_get_hpd:
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ return ret;
+}
+
+static
+int cdns_mhdp_get_edid_block(void *data, u8 *edid,
+ unsigned int block, size_t length)
+{
+ struct cdns_mhdp_device *mhdp = data;
+ u8 msg[2], reg[2], i;
+ int ret;
+
+ mutex_lock(&mhdp->mbox_mutex);
+
+ for (i = 0; i < 4; i++) {
+ msg[0] = block / 2;
+ msg[1] = block % 2;
+
+ ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX,
+ DPTX_GET_EDID, sizeof(msg), msg);
+ if (ret)
+ continue;
+
+ ret = cdns_mhdp_mailbox_recv_header(mhdp, MB_MODULE_ID_DP_TX,
+ DPTX_GET_EDID,
+ sizeof(reg) + length);
+ if (ret)
+ continue;
+
+ ret = cdns_mhdp_mailbox_recv_data(mhdp, reg, sizeof(reg));
+ if (ret)
+ continue;
+
+ ret = cdns_mhdp_mailbox_recv_data(mhdp, edid, length);
+ if (ret)
+ continue;
+
+ if (reg[0] == length && reg[1] == block / 2)
+ break;
+ }
+
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ if (ret)
+ dev_err(mhdp->dev, "get block[%d] edid failed: %d\n",
+ block, ret);
+
+ return ret;
+}
+
+static
+int cdns_mhdp_read_hpd_event(struct cdns_mhdp_device *mhdp)
+{
+ u8 event = 0;
+ int ret;
+
+ mutex_lock(&mhdp->mbox_mutex);
+
+ ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX,
+ DPTX_READ_EVENT, 0, NULL);
+ if (ret)
+ goto out;
+
+ ret = cdns_mhdp_mailbox_recv_header(mhdp, MB_MODULE_ID_DP_TX,
+ DPTX_READ_EVENT, sizeof(event));
+ if (ret < 0)
+ goto out;
+
+ ret = cdns_mhdp_mailbox_recv_data(mhdp, &event, sizeof(event));
+out:
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ if (ret < 0)
+ return ret;
+
+ dev_dbg(mhdp->dev, "%s: %s%s%s%s\n", __func__,
+ (event & DPTX_READ_EVENT_HPD_TO_HIGH) ? "TO_HIGH " : "",
+ (event & DPTX_READ_EVENT_HPD_TO_LOW) ? "TO_LOW " : "",
+ (event & DPTX_READ_EVENT_HPD_PULSE) ? "PULSE " : "",
+ (event & DPTX_READ_EVENT_HPD_STATE) ? "HPD_STATE " : "");
+
+ return event;
+}
+
+static
+int cdns_mhdp_adjust_lt(struct cdns_mhdp_device *mhdp, unsigned int nlanes,
+ unsigned int udelay, const u8 *lanes_data,
+ u8 link_status[DP_LINK_STATUS_SIZE])
+{
+ u8 payload[7];
+ u8 hdr[5]; /* For DPCD read response header */
+ u32 addr;
+ int ret;
+
+ if (nlanes != 4 && nlanes != 2 && nlanes != 1) {
+ dev_err(mhdp->dev, "invalid number of lanes: %u\n", nlanes);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ payload[0] = nlanes;
+ put_unaligned_be16(udelay, payload + 1);
+ memcpy(payload + 3, lanes_data, nlanes);
+
+ mutex_lock(&mhdp->mbox_mutex);
+
+ ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_DP_TX,
+ DPTX_ADJUST_LT,
+ sizeof(payload), payload);
+ if (ret)
+ goto out;
+
+ /* Yes, read the DPCD read command response */
+ ret = cdns_mhdp_mailbox_recv_header(mhdp, MB_MODULE_ID_DP_TX,
+ DPTX_READ_DPCD,
+ sizeof(hdr) + DP_LINK_STATUS_SIZE);
+ if (ret)
+ goto out;
+
+ ret = cdns_mhdp_mailbox_recv_data(mhdp, hdr, sizeof(hdr));
+ if (ret)
+ goto out;
+
+ addr = get_unaligned_be24(hdr + 2);
+ if (addr != DP_LANE0_1_STATUS)
+ goto out;
+
+ ret = cdns_mhdp_mailbox_recv_data(mhdp, link_status,
+ DP_LINK_STATUS_SIZE);
+
+out:
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ if (ret)
+ dev_err(mhdp->dev, "Failed to adjust Link Training.\n");
+
+ return ret;
+}
+
+/**
+ * cdns_mhdp_link_power_up() - power up a DisplayPort link
+ * @aux: DisplayPort AUX channel
+ * @link: pointer to a structure containing the link configuration
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+static
+int cdns_mhdp_link_power_up(struct drm_dp_aux *aux, struct cdns_mhdp_link *link)
+{
+ u8 value;
+ int err;
+
+ /* DP_SET_POWER register is only available on DPCD v1.1 and later */
+ if (link->revision < 0x11)
+ return 0;
+
+ err = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value);
+ if (err < 0)
+ return err;
+
+ value &= ~DP_SET_POWER_MASK;
+ value |= DP_SET_POWER_D0;
+
+ err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value);
+ if (err < 0)
+ return err;
+
+ /*
+ * According to the DP 1.1 specification, a "Sink Device must exit the
+ * power saving state within 1 ms" (Section 2.5.3.1, Table 5-52, "Sink
+ * Control Field" (register 0x600).
+ */
+ usleep_range(1000, 2000);
+
+ return 0;
+}
+
+/**
+ * cdns_mhdp_link_power_down() - power down a DisplayPort link
+ * @aux: DisplayPort AUX channel
+ * @link: pointer to a structure containing the link configuration
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+static
+int cdns_mhdp_link_power_down(struct drm_dp_aux *aux,
+ struct cdns_mhdp_link *link)
+{
+ u8 value;
+ int err;
+
+ /* DP_SET_POWER register is only available on DPCD v1.1 and later */
+ if (link->revision < 0x11)
+ return 0;
+
+ err = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value);
+ if (err < 0)
+ return err;
+
+ value &= ~DP_SET_POWER_MASK;
+ value |= DP_SET_POWER_D3;
+
+ err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+/**
+ * cdns_mhdp_link_configure() - configure a DisplayPort link
+ * @aux: DisplayPort AUX channel
+ * @link: pointer to a structure containing the link configuration
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+static
+int cdns_mhdp_link_configure(struct drm_dp_aux *aux,
+ struct cdns_mhdp_link *link)
+{
+ u8 values[2];
+ int err;
+
+ values[0] = drm_dp_link_rate_to_bw_code(link->rate);
+ values[1] = link->num_lanes;
+
+ if (link->capabilities & DP_LINK_CAP_ENHANCED_FRAMING)
+ values[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
+
+ err = drm_dp_dpcd_write(aux, DP_LINK_BW_SET, values, sizeof(values));
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+static unsigned int cdns_mhdp_max_link_rate(struct cdns_mhdp_device *mhdp)
+{
+ return min(mhdp->host.link_rate, mhdp->sink.link_rate);
+}
+
+static u8 cdns_mhdp_max_num_lanes(struct cdns_mhdp_device *mhdp)
+{
+ return min(mhdp->sink.lanes_cnt, mhdp->host.lanes_cnt);
+}
+
+static u8 cdns_mhdp_eq_training_pattern_supported(struct cdns_mhdp_device *mhdp)
+{
+ return fls(mhdp->host.pattern_supp & mhdp->sink.pattern_supp);
+}
+
+static bool cdns_mhdp_get_ssc_supported(struct cdns_mhdp_device *mhdp)
+{
+ /* Check if SSC is supported by both sides */
+ return mhdp->host.ssc && mhdp->sink.ssc;
+}
+
+static enum drm_connector_status cdns_mhdp_detect(struct cdns_mhdp_device *mhdp)
+{
+ dev_dbg(mhdp->dev, "%s: %d\n", __func__, mhdp->plugged);
+
+ if (mhdp->plugged)
+ return connector_status_connected;
+ else
+ return connector_status_disconnected;
+}
+
+static int cdns_mhdp_check_fw_version(struct cdns_mhdp_device *mhdp)
+{
+ u32 major_num, minor_num, revision;
+ u32 fw_ver, lib_ver;
+
+ fw_ver = (readl(mhdp->regs + CDNS_VER_H) << 8)
+ | readl(mhdp->regs + CDNS_VER_L);
+
+ lib_ver = (readl(mhdp->regs + CDNS_LIB_H_ADDR) << 8)
+ | readl(mhdp->regs + CDNS_LIB_L_ADDR);
+
+ if (lib_ver < 33984) {
+ /*
+ * Older FW versions with major number 1, used to store FW
+ * version information by storing repository revision number
+ * in registers. This is for identifying these FW versions.
+ */
+ major_num = 1;
+ minor_num = 2;
+ if (fw_ver == 26098) {
+ revision = 15;
+ } else if (lib_ver == 0 && fw_ver == 0) {
+ revision = 17;
+ } else {
+ dev_err(mhdp->dev, "Unsupported FW version: fw_ver = %u, lib_ver = %u\n",
+ fw_ver, lib_ver);
+ return -ENODEV;
+ }
+ } else {
+ /* To identify newer FW versions with major number 2 onwards. */
+ major_num = fw_ver / 10000;
+ minor_num = (fw_ver / 100) % 100;
+ revision = (fw_ver % 10000) % 100;
+ }
+
+ dev_dbg(mhdp->dev, "FW version: v%u.%u.%u\n", major_num, minor_num,
+ revision);
+ return 0;
+}
+
+static int cdns_mhdp_fw_activate(const struct firmware *fw,
+ struct cdns_mhdp_device *mhdp)
+{
+ unsigned int reg;
+ int ret;
+
+ /* Release uCPU reset and stall it. */
+ writel(CDNS_CPU_STALL, mhdp->regs + CDNS_APB_CTRL);
+
+ memcpy_toio(mhdp->regs + CDNS_MHDP_IMEM, fw->data, fw->size);
+
+ /* Leave debug mode, release stall */
+ writel(0, mhdp->regs + CDNS_APB_CTRL);
+
+ /*
+ * Wait for the KEEP_ALIVE "message" on the first 8 bits.
+ * Updated each sched "tick" (~2ms)
+ */
+ ret = readl_poll_timeout(mhdp->regs + CDNS_KEEP_ALIVE, reg,
+ reg & CDNS_KEEP_ALIVE_MASK, 500,
+ CDNS_KEEP_ALIVE_TIMEOUT);
+ if (ret) {
+ dev_err(mhdp->dev,
+ "device didn't give any life sign: reg %d\n", reg);
+ return ret;
+ }
+
+ ret = cdns_mhdp_check_fw_version(mhdp);
+ if (ret)
+ return ret;
+
+ /* Init events to 0 as it's not cleared by FW at boot but on read */
+ readl(mhdp->regs + CDNS_SW_EVENT0);
+ readl(mhdp->regs + CDNS_SW_EVENT1);
+ readl(mhdp->regs + CDNS_SW_EVENT2);
+ readl(mhdp->regs + CDNS_SW_EVENT3);
+
+ /* Activate uCPU */
+ ret = cdns_mhdp_set_firmware_active(mhdp, true);
+ if (ret)
+ return ret;
+
+ spin_lock(&mhdp->start_lock);
+
+ mhdp->hw_state = MHDP_HW_READY;
+
+ /*
+ * Here we must keep the lock while enabling the interrupts
+ * since it would otherwise be possible that interrupt enable
+ * code is executed after the bridge is detached. The similar
+ * situation is not possible in attach()/detach() callbacks
+ * since the hw_state changes from MHDP_HW_READY to
+ * MHDP_HW_STOPPED happens only due to driver removal when
+ * bridge should already be detached.
+ */
+ if (mhdp->bridge_attached)
+ writel(~(u32)CDNS_APB_INT_MASK_SW_EVENT_INT,
+ mhdp->regs + CDNS_APB_INT_MASK);
+
+ spin_unlock(&mhdp->start_lock);
+
+ wake_up(&mhdp->fw_load_wq);
+ dev_dbg(mhdp->dev, "DP FW activated\n");
+
+ return 0;
+}
+
+static void cdns_mhdp_fw_cb(const struct firmware *fw, void *context)
+{
+ struct cdns_mhdp_device *mhdp = context;
+ bool bridge_attached;
+ int ret;
+
+ dev_dbg(mhdp->dev, "firmware callback\n");
+
+ if (!fw || !fw->data) {
+ dev_err(mhdp->dev, "%s: No firmware.\n", __func__);
+ return;
+ }
+
+ ret = cdns_mhdp_fw_activate(fw, mhdp);
+
+ release_firmware(fw);
+
+ if (ret)
+ return;
+
+ /*
+ * XXX how to make sure the bridge is still attached when
+ * calling drm_kms_helper_hotplug_event() after releasing
+ * the lock? We should not hold the spin lock when
+ * calling drm_kms_helper_hotplug_event() since it may
+ * cause a dead lock. FB-dev console calls detect from the
+ * same thread just down the call stack started here.
+ */
+ spin_lock(&mhdp->start_lock);
+ bridge_attached = mhdp->bridge_attached;
+ spin_unlock(&mhdp->start_lock);
+ if (bridge_attached) {
+ if (mhdp->connector.dev)
+ drm_kms_helper_hotplug_event(mhdp->bridge.dev);
+ else
+ drm_bridge_hpd_notify(&mhdp->bridge, cdns_mhdp_detect(mhdp));
+ }
+}
+
+static int cdns_mhdp_load_firmware(struct cdns_mhdp_device *mhdp)
+{
+ int ret;
+
+ ret = request_firmware_nowait(THIS_MODULE, true, FW_NAME, mhdp->dev,
+ GFP_KERNEL, mhdp, cdns_mhdp_fw_cb);
+ if (ret) {
+ dev_err(mhdp->dev, "failed to load firmware (%s), ret: %d\n",
+ FW_NAME, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static ssize_t cdns_mhdp_transfer(struct drm_dp_aux *aux,
+ struct drm_dp_aux_msg *msg)
+{
+ struct cdns_mhdp_device *mhdp = dev_get_drvdata(aux->dev);
+ int ret;
+
+ if (msg->request != DP_AUX_NATIVE_WRITE &&
+ msg->request != DP_AUX_NATIVE_READ)
+ return -EOPNOTSUPP;
+
+ if (msg->request == DP_AUX_NATIVE_WRITE) {
+ const u8 *buf = msg->buffer;
+ unsigned int i;
+
+ for (i = 0; i < msg->size; ++i) {
+ ret = cdns_mhdp_dpcd_write(mhdp,
+ msg->address + i, buf[i]);
+ if (!ret)
+ continue;
+
+ dev_err(mhdp->dev,
+ "Failed to write DPCD addr %u\n",
+ msg->address + i);
+
+ return ret;
+ }
+ } else {
+ ret = cdns_mhdp_dpcd_read(mhdp, msg->address,
+ msg->buffer, msg->size);
+ if (ret) {
+ dev_err(mhdp->dev,
+ "Failed to read DPCD addr %u\n",
+ msg->address);
+
+ return ret;
+ }
+ }
+
+ return msg->size;
+}
+
+static int cdns_mhdp_link_training_init(struct cdns_mhdp_device *mhdp)
+{
+ union phy_configure_opts phy_cfg;
+ u32 reg32;
+ int ret;
+
+ drm_dp_dpcd_writeb(&mhdp->aux, DP_TRAINING_PATTERN_SET,
+ DP_TRAINING_PATTERN_DISABLE);
+
+ /* Reset PHY configuration */
+ reg32 = CDNS_PHY_COMMON_CONFIG | CDNS_PHY_TRAINING_TYPE(1);
+ if (!mhdp->host.scrambler)
+ reg32 |= CDNS_PHY_SCRAMBLER_BYPASS;
+
+ cdns_mhdp_reg_write(mhdp, CDNS_DPTX_PHY_CONFIG, reg32);
+
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_ENHNCD,
+ mhdp->sink.enhanced & mhdp->host.enhanced);
+
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_LANE_EN,
+ CDNS_DP_LANE_EN_LANES(mhdp->link.num_lanes));
+
+ cdns_mhdp_link_configure(&mhdp->aux, &mhdp->link);
+ phy_cfg.dp.link_rate = mhdp->link.rate / 100;
+ phy_cfg.dp.lanes = mhdp->link.num_lanes;
+
+ memset(phy_cfg.dp.voltage, 0, sizeof(phy_cfg.dp.voltage));
+ memset(phy_cfg.dp.pre, 0, sizeof(phy_cfg.dp.pre));
+
+ phy_cfg.dp.ssc = cdns_mhdp_get_ssc_supported(mhdp);
+ phy_cfg.dp.set_lanes = true;
+ phy_cfg.dp.set_rate = true;
+ phy_cfg.dp.set_voltages = true;
+ ret = phy_configure(mhdp->phy, &phy_cfg);
+ if (ret) {
+ dev_err(mhdp->dev, "%s: phy_configure() failed: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ cdns_mhdp_reg_write(mhdp, CDNS_DPTX_PHY_CONFIG,
+ CDNS_PHY_COMMON_CONFIG |
+ CDNS_PHY_TRAINING_EN |
+ CDNS_PHY_TRAINING_TYPE(1) |
+ CDNS_PHY_SCRAMBLER_BYPASS);
+
+ drm_dp_dpcd_writeb(&mhdp->aux, DP_TRAINING_PATTERN_SET,
+ DP_TRAINING_PATTERN_1 | DP_LINK_SCRAMBLING_DISABLE);
+
+ return 0;
+}
+
+static void cdns_mhdp_get_adjust_train(struct cdns_mhdp_device *mhdp,
+ u8 link_status[DP_LINK_STATUS_SIZE],
+ u8 lanes_data[CDNS_DP_MAX_NUM_LANES],
+ union phy_configure_opts *phy_cfg)
+{
+ u8 adjust, max_pre_emph, max_volt_swing;
+ u8 set_volt, set_pre;
+ unsigned int i;
+
+ max_pre_emph = CDNS_PRE_EMPHASIS(mhdp->host.pre_emphasis)
+ << DP_TRAIN_PRE_EMPHASIS_SHIFT;
+ max_volt_swing = CDNS_VOLT_SWING(mhdp->host.volt_swing);
+
+ for (i = 0; i < mhdp->link.num_lanes; i++) {
+ /* Check if Voltage swing and pre-emphasis are within limits */
+ adjust = drm_dp_get_adjust_request_voltage(link_status, i);
+ set_volt = min(adjust, max_volt_swing);
+
+ adjust = drm_dp_get_adjust_request_pre_emphasis(link_status, i);
+ set_pre = min(adjust, max_pre_emph)
+ >> DP_TRAIN_PRE_EMPHASIS_SHIFT;
+
+ /*
+ * Voltage swing level and pre-emphasis level combination is
+ * not allowed: leaving pre-emphasis as-is, and adjusting
+ * voltage swing.
+ */
+ if (set_volt + set_pre > 3)
+ set_volt = 3 - set_pre;
+
+ phy_cfg->dp.voltage[i] = set_volt;
+ lanes_data[i] = set_volt;
+
+ if (set_volt == max_volt_swing)
+ lanes_data[i] |= DP_TRAIN_MAX_SWING_REACHED;
+
+ phy_cfg->dp.pre[i] = set_pre;
+ lanes_data[i] |= (set_pre << DP_TRAIN_PRE_EMPHASIS_SHIFT);
+
+ if (set_pre == (max_pre_emph >> DP_TRAIN_PRE_EMPHASIS_SHIFT))
+ lanes_data[i] |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
+ }
+}
+
+static
+void cdns_mhdp_set_adjust_request_voltage(u8 link_status[DP_LINK_STATUS_SIZE],
+ unsigned int lane, u8 volt)
+{
+ unsigned int s = ((lane & 1) ?
+ DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT :
+ DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT);
+ unsigned int idx = DP_ADJUST_REQUEST_LANE0_1 - DP_LANE0_1_STATUS + (lane >> 1);
+
+ link_status[idx] &= ~(DP_ADJUST_VOLTAGE_SWING_LANE0_MASK << s);
+ link_status[idx] |= volt << s;
+}
+
+static
+void cdns_mhdp_set_adjust_request_pre_emphasis(u8 link_status[DP_LINK_STATUS_SIZE],
+ unsigned int lane, u8 pre_emphasis)
+{
+ unsigned int s = ((lane & 1) ?
+ DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT :
+ DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT);
+ unsigned int idx = DP_ADJUST_REQUEST_LANE0_1 - DP_LANE0_1_STATUS + (lane >> 1);
+
+ link_status[idx] &= ~(DP_ADJUST_PRE_EMPHASIS_LANE0_MASK << s);
+ link_status[idx] |= pre_emphasis << s;
+}
+
+static void cdns_mhdp_adjust_requested_eq(struct cdns_mhdp_device *mhdp,
+ u8 link_status[DP_LINK_STATUS_SIZE])
+{
+ u8 max_pre = CDNS_PRE_EMPHASIS(mhdp->host.pre_emphasis);
+ u8 max_volt = CDNS_VOLT_SWING(mhdp->host.volt_swing);
+ unsigned int i;
+ u8 volt, pre;
+
+ for (i = 0; i < mhdp->link.num_lanes; i++) {
+ volt = drm_dp_get_adjust_request_voltage(link_status, i);
+ pre = drm_dp_get_adjust_request_pre_emphasis(link_status, i);
+ if (volt + pre > 3)
+ cdns_mhdp_set_adjust_request_voltage(link_status, i,
+ 3 - pre);
+ if (mhdp->host.volt_swing & CDNS_FORCE_VOLT_SWING)
+ cdns_mhdp_set_adjust_request_voltage(link_status, i,
+ max_volt);
+ if (mhdp->host.pre_emphasis & CDNS_FORCE_PRE_EMPHASIS)
+ cdns_mhdp_set_adjust_request_pre_emphasis(link_status,
+ i, max_pre);
+ }
+}
+
+static void cdns_mhdp_print_lt_status(const char *prefix,
+ struct cdns_mhdp_device *mhdp,
+ union phy_configure_opts *phy_cfg)
+{
+ char vs[8] = "0/0/0/0";
+ char pe[8] = "0/0/0/0";
+ unsigned int i;
+
+ for (i = 0; i < mhdp->link.num_lanes; i++) {
+ vs[i * 2] = '0' + phy_cfg->dp.voltage[i];
+ pe[i * 2] = '0' + phy_cfg->dp.pre[i];
+ }
+
+ vs[i * 2 - 1] = '\0';
+ pe[i * 2 - 1] = '\0';
+
+ dev_dbg(mhdp->dev, "%s, %u lanes, %u Mbps, vs %s, pe %s\n",
+ prefix,
+ mhdp->link.num_lanes, mhdp->link.rate / 100,
+ vs, pe);
+}
+
+static bool cdns_mhdp_link_training_channel_eq(struct cdns_mhdp_device *mhdp,
+ u8 eq_tps,
+ unsigned int training_interval)
+{
+ u8 lanes_data[CDNS_DP_MAX_NUM_LANES], fail_counter_short = 0;
+ u8 link_status[DP_LINK_STATUS_SIZE];
+ union phy_configure_opts phy_cfg;
+ u32 reg32;
+ int ret;
+ bool r;
+
+ dev_dbg(mhdp->dev, "Starting EQ phase\n");
+
+ /* Enable link training TPS[eq_tps] in PHY */
+ reg32 = CDNS_PHY_COMMON_CONFIG | CDNS_PHY_TRAINING_EN |
+ CDNS_PHY_TRAINING_TYPE(eq_tps);
+ if (eq_tps != 4)
+ reg32 |= CDNS_PHY_SCRAMBLER_BYPASS;
+ cdns_mhdp_reg_write(mhdp, CDNS_DPTX_PHY_CONFIG, reg32);
+
+ drm_dp_dpcd_writeb(&mhdp->aux, DP_TRAINING_PATTERN_SET,
+ (eq_tps != 4) ? eq_tps | DP_LINK_SCRAMBLING_DISABLE :
+ CDNS_DP_TRAINING_PATTERN_4);
+
+ drm_dp_dpcd_read_link_status(&mhdp->aux, link_status);
+
+ do {
+ cdns_mhdp_get_adjust_train(mhdp, link_status, lanes_data,
+ &phy_cfg);
+ phy_cfg.dp.lanes = mhdp->link.num_lanes;
+ phy_cfg.dp.ssc = cdns_mhdp_get_ssc_supported(mhdp);
+ phy_cfg.dp.set_lanes = false;
+ phy_cfg.dp.set_rate = false;
+ phy_cfg.dp.set_voltages = true;
+ ret = phy_configure(mhdp->phy, &phy_cfg);
+ if (ret) {
+ dev_err(mhdp->dev, "%s: phy_configure() failed: %d\n",
+ __func__, ret);
+ goto err;
+ }
+
+ cdns_mhdp_adjust_lt(mhdp, mhdp->link.num_lanes,
+ training_interval, lanes_data, link_status);
+
+ r = drm_dp_clock_recovery_ok(link_status, mhdp->link.num_lanes);
+ if (!r)
+ goto err;
+
+ if (drm_dp_channel_eq_ok(link_status, mhdp->link.num_lanes)) {
+ cdns_mhdp_print_lt_status("EQ phase ok", mhdp,
+ &phy_cfg);
+ return true;
+ }
+
+ fail_counter_short++;
+
+ cdns_mhdp_adjust_requested_eq(mhdp, link_status);
+ } while (fail_counter_short < 5);
+
+err:
+ cdns_mhdp_print_lt_status("EQ phase failed", mhdp, &phy_cfg);
+
+ return false;
+}
+
+static void cdns_mhdp_adjust_requested_cr(struct cdns_mhdp_device *mhdp,
+ u8 link_status[DP_LINK_STATUS_SIZE],
+ u8 *req_volt, u8 *req_pre)
+{
+ const u8 max_volt = CDNS_VOLT_SWING(mhdp->host.volt_swing);
+ const u8 max_pre = CDNS_PRE_EMPHASIS(mhdp->host.pre_emphasis);
+ unsigned int i;
+
+ for (i = 0; i < mhdp->link.num_lanes; i++) {
+ u8 val;
+
+ val = mhdp->host.volt_swing & CDNS_FORCE_VOLT_SWING ?
+ max_volt : req_volt[i];
+ cdns_mhdp_set_adjust_request_voltage(link_status, i, val);
+
+ val = mhdp->host.pre_emphasis & CDNS_FORCE_PRE_EMPHASIS ?
+ max_pre : req_pre[i];
+ cdns_mhdp_set_adjust_request_pre_emphasis(link_status, i, val);
+ }
+}
+
+static
+void cdns_mhdp_validate_cr(struct cdns_mhdp_device *mhdp, bool *cr_done,
+ bool *same_before_adjust, bool *max_swing_reached,
+ u8 before_cr[CDNS_DP_MAX_NUM_LANES],
+ u8 after_cr[DP_LINK_STATUS_SIZE], u8 *req_volt,
+ u8 *req_pre)
+{
+ const u8 max_volt = CDNS_VOLT_SWING(mhdp->host.volt_swing);
+ const u8 max_pre = CDNS_PRE_EMPHASIS(mhdp->host.pre_emphasis);
+ bool same_pre, same_volt;
+ unsigned int i;
+ u8 adjust;
+
+ *same_before_adjust = false;
+ *max_swing_reached = false;
+ *cr_done = drm_dp_clock_recovery_ok(after_cr, mhdp->link.num_lanes);
+
+ for (i = 0; i < mhdp->link.num_lanes; i++) {
+ adjust = drm_dp_get_adjust_request_voltage(after_cr, i);
+ req_volt[i] = min(adjust, max_volt);
+
+ adjust = drm_dp_get_adjust_request_pre_emphasis(after_cr, i) >>
+ DP_TRAIN_PRE_EMPHASIS_SHIFT;
+ req_pre[i] = min(adjust, max_pre);
+
+ same_pre = (before_cr[i] & DP_TRAIN_PRE_EMPHASIS_MASK) ==
+ req_pre[i] << DP_TRAIN_PRE_EMPHASIS_SHIFT;
+ same_volt = (before_cr[i] & DP_TRAIN_VOLTAGE_SWING_MASK) ==
+ req_volt[i];
+ if (same_pre && same_volt)
+ *same_before_adjust = true;
+
+ /* 3.1.5.2 in DP Standard v1.4. Table 3-1 */
+ if (!*cr_done && req_volt[i] + req_pre[i] >= 3) {
+ *max_swing_reached = true;
+ return;
+ }
+ }
+}
+
+static bool cdns_mhdp_link_training_cr(struct cdns_mhdp_device *mhdp)
+{
+ u8 lanes_data[CDNS_DP_MAX_NUM_LANES],
+ fail_counter_short = 0, fail_counter_cr_long = 0;
+ u8 link_status[DP_LINK_STATUS_SIZE];
+ bool cr_done;
+ union phy_configure_opts phy_cfg;
+ int ret;
+
+ dev_dbg(mhdp->dev, "Starting CR phase\n");
+
+ ret = cdns_mhdp_link_training_init(mhdp);
+ if (ret)
+ goto err;
+
+ drm_dp_dpcd_read_link_status(&mhdp->aux, link_status);
+
+ do {
+ u8 requested_adjust_volt_swing[CDNS_DP_MAX_NUM_LANES] = {};
+ u8 requested_adjust_pre_emphasis[CDNS_DP_MAX_NUM_LANES] = {};
+ bool same_before_adjust, max_swing_reached;
+
+ cdns_mhdp_get_adjust_train(mhdp, link_status, lanes_data,
+ &phy_cfg);
+ phy_cfg.dp.lanes = mhdp->link.num_lanes;
+ phy_cfg.dp.ssc = cdns_mhdp_get_ssc_supported(mhdp);
+ phy_cfg.dp.set_lanes = false;
+ phy_cfg.dp.set_rate = false;
+ phy_cfg.dp.set_voltages = true;
+ ret = phy_configure(mhdp->phy, &phy_cfg);
+ if (ret) {
+ dev_err(mhdp->dev, "%s: phy_configure() failed: %d\n",
+ __func__, ret);
+ goto err;
+ }
+
+ cdns_mhdp_adjust_lt(mhdp, mhdp->link.num_lanes, 100,
+ lanes_data, link_status);
+
+ cdns_mhdp_validate_cr(mhdp, &cr_done, &same_before_adjust,
+ &max_swing_reached, lanes_data,
+ link_status,
+ requested_adjust_volt_swing,
+ requested_adjust_pre_emphasis);
+
+ if (max_swing_reached) {
+ dev_err(mhdp->dev, "CR: max swing reached\n");
+ goto err;
+ }
+
+ if (cr_done) {
+ cdns_mhdp_print_lt_status("CR phase ok", mhdp,
+ &phy_cfg);
+ return true;
+ }
+
+ /* Not all CR_DONE bits set */
+ fail_counter_cr_long++;
+
+ if (same_before_adjust) {
+ fail_counter_short++;
+ continue;
+ }
+
+ fail_counter_short = 0;
+ /*
+ * Voltage swing/pre-emphasis adjust requested
+ * during CR phase
+ */
+ cdns_mhdp_adjust_requested_cr(mhdp, link_status,
+ requested_adjust_volt_swing,
+ requested_adjust_pre_emphasis);
+ } while (fail_counter_short < 5 && fail_counter_cr_long < 10);
+
+err:
+ cdns_mhdp_print_lt_status("CR phase failed", mhdp, &phy_cfg);
+
+ return false;
+}
+
+static void cdns_mhdp_lower_link_rate(struct cdns_mhdp_link *link)
+{
+ switch (drm_dp_link_rate_to_bw_code(link->rate)) {
+ case DP_LINK_BW_2_7:
+ link->rate = drm_dp_bw_code_to_link_rate(DP_LINK_BW_1_62);
+ break;
+ case DP_LINK_BW_5_4:
+ link->rate = drm_dp_bw_code_to_link_rate(DP_LINK_BW_2_7);
+ break;
+ case DP_LINK_BW_8_1:
+ link->rate = drm_dp_bw_code_to_link_rate(DP_LINK_BW_5_4);
+ break;
+ }
+}
+
+static int cdns_mhdp_link_training(struct cdns_mhdp_device *mhdp,
+ unsigned int training_interval)
+{
+ u32 reg32;
+ const u8 eq_tps = cdns_mhdp_eq_training_pattern_supported(mhdp);
+ int ret;
+
+ while (1) {
+ if (!cdns_mhdp_link_training_cr(mhdp)) {
+ if (drm_dp_link_rate_to_bw_code(mhdp->link.rate) !=
+ DP_LINK_BW_1_62) {
+ dev_dbg(mhdp->dev,
+ "Reducing link rate during CR phase\n");
+ cdns_mhdp_lower_link_rate(&mhdp->link);
+
+ continue;
+ } else if (mhdp->link.num_lanes > 1) {
+ dev_dbg(mhdp->dev,
+ "Reducing lanes number during CR phase\n");
+ mhdp->link.num_lanes >>= 1;
+ mhdp->link.rate = cdns_mhdp_max_link_rate(mhdp);
+
+ continue;
+ }
+
+ dev_err(mhdp->dev,
+ "Link training failed during CR phase\n");
+ goto err;
+ }
+
+ if (cdns_mhdp_link_training_channel_eq(mhdp, eq_tps,
+ training_interval))
+ break;
+
+ if (mhdp->link.num_lanes > 1) {
+ dev_dbg(mhdp->dev,
+ "Reducing lanes number during EQ phase\n");
+ mhdp->link.num_lanes >>= 1;
+
+ continue;
+ } else if (drm_dp_link_rate_to_bw_code(mhdp->link.rate) !=
+ DP_LINK_BW_1_62) {
+ dev_dbg(mhdp->dev,
+ "Reducing link rate during EQ phase\n");
+ cdns_mhdp_lower_link_rate(&mhdp->link);
+ mhdp->link.num_lanes = cdns_mhdp_max_num_lanes(mhdp);
+
+ continue;
+ }
+
+ dev_err(mhdp->dev, "Link training failed during EQ phase\n");
+ goto err;
+ }
+
+ dev_dbg(mhdp->dev, "Link training ok. Lanes: %u, Rate %u Mbps\n",
+ mhdp->link.num_lanes, mhdp->link.rate / 100);
+
+ drm_dp_dpcd_writeb(&mhdp->aux, DP_TRAINING_PATTERN_SET,
+ mhdp->host.scrambler ? 0 :
+ DP_LINK_SCRAMBLING_DISABLE);
+
+ ret = cdns_mhdp_reg_read(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, &reg32);
+ if (ret < 0) {
+ dev_err(mhdp->dev,
+ "Failed to read CDNS_DP_FRAMER_GLOBAL_CONFIG %d\n",
+ ret);
+ return ret;
+ }
+ reg32 &= ~GENMASK(1, 0);
+ reg32 |= CDNS_DP_NUM_LANES(mhdp->link.num_lanes);
+ reg32 |= CDNS_DP_WR_FAILING_EDGE_VSYNC;
+ reg32 |= CDNS_DP_FRAMER_EN;
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, reg32);
+
+ /* Reset PHY config */
+ reg32 = CDNS_PHY_COMMON_CONFIG | CDNS_PHY_TRAINING_TYPE(1);
+ if (!mhdp->host.scrambler)
+ reg32 |= CDNS_PHY_SCRAMBLER_BYPASS;
+ cdns_mhdp_reg_write(mhdp, CDNS_DPTX_PHY_CONFIG, reg32);
+
+ return 0;
+err:
+ /* Reset PHY config */
+ reg32 = CDNS_PHY_COMMON_CONFIG | CDNS_PHY_TRAINING_TYPE(1);
+ if (!mhdp->host.scrambler)
+ reg32 |= CDNS_PHY_SCRAMBLER_BYPASS;
+ cdns_mhdp_reg_write(mhdp, CDNS_DPTX_PHY_CONFIG, reg32);
+
+ drm_dp_dpcd_writeb(&mhdp->aux, DP_TRAINING_PATTERN_SET,
+ DP_TRAINING_PATTERN_DISABLE);
+
+ return -EIO;
+}
+
+static u32 cdns_mhdp_get_training_interval_us(struct cdns_mhdp_device *mhdp,
+ u32 interval)
+{
+ if (interval == 0)
+ return 400;
+ if (interval < 5)
+ return 4000 << (interval - 1);
+ dev_err(mhdp->dev,
+ "wrong training interval returned by DPCD: %d\n", interval);
+ return 0;
+}
+
+static void cdns_mhdp_fill_host_caps(struct cdns_mhdp_device *mhdp)
+{
+ unsigned int link_rate;
+
+ /* Get source capabilities based on PHY attributes */
+
+ mhdp->host.lanes_cnt = mhdp->phy->attrs.bus_width;
+ if (!mhdp->host.lanes_cnt)
+ mhdp->host.lanes_cnt = 4;
+
+ link_rate = mhdp->phy->attrs.max_link_rate;
+ if (!link_rate)
+ link_rate = drm_dp_bw_code_to_link_rate(DP_LINK_BW_8_1);
+ else
+ /* PHY uses Mb/s, DRM uses tens of kb/s. */
+ link_rate *= 100;
+
+ mhdp->host.link_rate = link_rate;
+ mhdp->host.volt_swing = CDNS_VOLT_SWING(3);
+ mhdp->host.pre_emphasis = CDNS_PRE_EMPHASIS(3);
+ mhdp->host.pattern_supp = CDNS_SUPPORT_TPS(1) |
+ CDNS_SUPPORT_TPS(2) | CDNS_SUPPORT_TPS(3) |
+ CDNS_SUPPORT_TPS(4);
+ mhdp->host.lane_mapping = CDNS_LANE_MAPPING_NORMAL;
+ mhdp->host.fast_link = false;
+ mhdp->host.enhanced = true;
+ mhdp->host.scrambler = true;
+ mhdp->host.ssc = false;
+}
+
+static void cdns_mhdp_fill_sink_caps(struct cdns_mhdp_device *mhdp,
+ u8 dpcd[DP_RECEIVER_CAP_SIZE])
+{
+ mhdp->sink.link_rate = mhdp->link.rate;
+ mhdp->sink.lanes_cnt = mhdp->link.num_lanes;
+ mhdp->sink.enhanced = !!(mhdp->link.capabilities &
+ DP_LINK_CAP_ENHANCED_FRAMING);
+
+ /* Set SSC support */
+ mhdp->sink.ssc = !!(dpcd[DP_MAX_DOWNSPREAD] &
+ DP_MAX_DOWNSPREAD_0_5);
+
+ /* Set TPS support */
+ mhdp->sink.pattern_supp = CDNS_SUPPORT_TPS(1) | CDNS_SUPPORT_TPS(2);
+ if (drm_dp_tps3_supported(dpcd))
+ mhdp->sink.pattern_supp |= CDNS_SUPPORT_TPS(3);
+ if (drm_dp_tps4_supported(dpcd))
+ mhdp->sink.pattern_supp |= CDNS_SUPPORT_TPS(4);
+
+ /* Set fast link support */
+ mhdp->sink.fast_link = !!(dpcd[DP_MAX_DOWNSPREAD] &
+ DP_NO_AUX_HANDSHAKE_LINK_TRAINING);
+}
+
+static int cdns_mhdp_link_up(struct cdns_mhdp_device *mhdp)
+{
+ u8 dpcd[DP_RECEIVER_CAP_SIZE], amp[2];
+ u32 resp, interval, interval_us;
+ u8 ext_cap_chk = 0;
+ unsigned int addr;
+ int err;
+
+ WARN_ON(!mutex_is_locked(&mhdp->link_mutex));
+
+ drm_dp_dpcd_readb(&mhdp->aux, DP_TRAINING_AUX_RD_INTERVAL,
+ &ext_cap_chk);
+
+ if (ext_cap_chk & DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT)
+ addr = DP_DP13_DPCD_REV;
+ else
+ addr = DP_DPCD_REV;
+
+ err = drm_dp_dpcd_read(&mhdp->aux, addr, dpcd, DP_RECEIVER_CAP_SIZE);
+ if (err < 0) {
+ dev_err(mhdp->dev, "Failed to read receiver capabilities\n");
+ return err;
+ }
+
+ mhdp->link.revision = dpcd[0];
+ mhdp->link.rate = drm_dp_bw_code_to_link_rate(dpcd[1]);
+ mhdp->link.num_lanes = dpcd[2] & DP_MAX_LANE_COUNT_MASK;
+
+ if (dpcd[2] & DP_ENHANCED_FRAME_CAP)
+ mhdp->link.capabilities |= DP_LINK_CAP_ENHANCED_FRAMING;
+
+ dev_dbg(mhdp->dev, "Set sink device power state via DPCD\n");
+ cdns_mhdp_link_power_up(&mhdp->aux, &mhdp->link);
+
+ cdns_mhdp_fill_sink_caps(mhdp, dpcd);
+
+ mhdp->link.rate = cdns_mhdp_max_link_rate(mhdp);
+ mhdp->link.num_lanes = cdns_mhdp_max_num_lanes(mhdp);
+
+ /* Disable framer for link training */
+ err = cdns_mhdp_reg_read(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, &resp);
+ if (err < 0) {
+ dev_err(mhdp->dev,
+ "Failed to read CDNS_DP_FRAMER_GLOBAL_CONFIG %d\n",
+ err);
+ return err;
+ }
+
+ resp &= ~CDNS_DP_FRAMER_EN;
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, resp);
+
+ /* Spread AMP if required, enable 8b/10b coding */
+ amp[0] = cdns_mhdp_get_ssc_supported(mhdp) ? DP_SPREAD_AMP_0_5 : 0;
+ amp[1] = DP_SET_ANSI_8B10B;
+ drm_dp_dpcd_write(&mhdp->aux, DP_DOWNSPREAD_CTRL, amp, 2);
+
+ if (mhdp->host.fast_link & mhdp->sink.fast_link) {
+ dev_err(mhdp->dev, "fastlink not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ interval = dpcd[DP_TRAINING_AUX_RD_INTERVAL] & DP_TRAINING_AUX_RD_MASK;
+ interval_us = cdns_mhdp_get_training_interval_us(mhdp, interval);
+ if (!interval_us ||
+ cdns_mhdp_link_training(mhdp, interval_us)) {
+ dev_err(mhdp->dev, "Link training failed. Exiting.\n");
+ return -EIO;
+ }
+
+ mhdp->link_up = true;
+
+ return 0;
+}
+
+static void cdns_mhdp_link_down(struct cdns_mhdp_device *mhdp)
+{
+ WARN_ON(!mutex_is_locked(&mhdp->link_mutex));
+
+ if (mhdp->plugged)
+ cdns_mhdp_link_power_down(&mhdp->aux, &mhdp->link);
+
+ mhdp->link_up = false;
+}
+
+static struct edid *cdns_mhdp_get_edid(struct cdns_mhdp_device *mhdp,
+ struct drm_connector *connector)
+{
+ if (!mhdp->plugged)
+ return NULL;
+
+ return drm_do_get_edid(connector, cdns_mhdp_get_edid_block, mhdp);
+}
+
+static int cdns_mhdp_get_modes(struct drm_connector *connector)
+{
+ struct cdns_mhdp_device *mhdp = connector_to_mhdp(connector);
+ struct edid *edid;
+ int num_modes;
+
+ if (!mhdp->plugged)
+ return 0;
+
+ edid = cdns_mhdp_get_edid(mhdp, connector);
+ if (!edid) {
+ dev_err(mhdp->dev, "Failed to read EDID\n");
+ return 0;
+ }
+
+ drm_connector_update_edid_property(connector, edid);
+ num_modes = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+
+ /*
+ * HACK: Warn about unsupported display formats until we deal
+ * with them correctly.
+ */
+ if (connector->display_info.color_formats &&
+ !(connector->display_info.color_formats &
+ mhdp->display_fmt.color_format))
+ dev_warn(mhdp->dev,
+ "%s: No supported color_format found (0x%08x)\n",
+ __func__, connector->display_info.color_formats);
+
+ if (connector->display_info.bpc &&
+ connector->display_info.bpc < mhdp->display_fmt.bpc)
+ dev_warn(mhdp->dev, "%s: Display bpc only %d < %d\n",
+ __func__, connector->display_info.bpc,
+ mhdp->display_fmt.bpc);
+
+ return num_modes;
+}
+
+static int cdns_mhdp_connector_detect(struct drm_connector *conn,
+ struct drm_modeset_acquire_ctx *ctx,
+ bool force)
+{
+ struct cdns_mhdp_device *mhdp = connector_to_mhdp(conn);
+
+ return cdns_mhdp_detect(mhdp);
+}
+
+static u32 cdns_mhdp_get_bpp(struct cdns_mhdp_display_fmt *fmt)
+{
+ u32 bpp;
+
+ if (fmt->y_only)
+ return fmt->bpc;
+
+ switch (fmt->color_format) {
+ case DRM_COLOR_FORMAT_RGB444:
+ case DRM_COLOR_FORMAT_YCBCR444:
+ bpp = fmt->bpc * 3;
+ break;
+ case DRM_COLOR_FORMAT_YCBCR422:
+ bpp = fmt->bpc * 2;
+ break;
+ case DRM_COLOR_FORMAT_YCBCR420:
+ bpp = fmt->bpc * 3 / 2;
+ break;
+ default:
+ bpp = fmt->bpc * 3;
+ WARN_ON(1);
+ }
+ return bpp;
+}
+
+static
+bool cdns_mhdp_bandwidth_ok(struct cdns_mhdp_device *mhdp,
+ const struct drm_display_mode *mode,
+ unsigned int lanes, unsigned int rate)
+{
+ u32 max_bw, req_bw, bpp;
+
+ /*
+ * mode->clock is expressed in kHz. Multiplying by bpp and dividing by 8
+ * we get the number of kB/s. DisplayPort applies a 8b-10b encoding, the
+ * value thus equals the bandwidth in 10kb/s units, which matches the
+ * units of the rate parameter.
+ */
+
+ bpp = cdns_mhdp_get_bpp(&mhdp->display_fmt);
+ req_bw = mode->clock * bpp / 8;
+ max_bw = lanes * rate;
+ if (req_bw > max_bw) {
+ dev_dbg(mhdp->dev,
+ "Unsupported Mode: %s, Req BW: %u, Available Max BW:%u\n",
+ mode->name, req_bw, max_bw);
+
+ return false;
+ }
+
+ return true;
+}
+
+static
+enum drm_mode_status cdns_mhdp_mode_valid(struct drm_connector *conn,
+ struct drm_display_mode *mode)
+{
+ struct cdns_mhdp_device *mhdp = connector_to_mhdp(conn);
+
+ mutex_lock(&mhdp->link_mutex);
+
+ if (!cdns_mhdp_bandwidth_ok(mhdp, mode, mhdp->link.num_lanes,
+ mhdp->link.rate)) {
+ mutex_unlock(&mhdp->link_mutex);
+ return MODE_CLOCK_HIGH;
+ }
+
+ mutex_unlock(&mhdp->link_mutex);
+ return MODE_OK;
+}
+
+static int cdns_mhdp_connector_atomic_check(struct drm_connector *conn,
+ struct drm_atomic_state *state)
+{
+ struct cdns_mhdp_device *mhdp = connector_to_mhdp(conn);
+ struct drm_connector_state *old_state, *new_state;
+ struct drm_crtc_state *crtc_state;
+ u64 old_cp, new_cp;
+
+ if (!mhdp->hdcp_supported)
+ return 0;
+
+ old_state = drm_atomic_get_old_connector_state(state, conn);
+ new_state = drm_atomic_get_new_connector_state(state, conn);
+ old_cp = old_state->content_protection;
+ new_cp = new_state->content_protection;
+
+ if (old_state->hdcp_content_type != new_state->hdcp_content_type &&
+ new_cp != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
+ new_state->content_protection = DRM_MODE_CONTENT_PROTECTION_DESIRED;
+ goto mode_changed;
+ }
+
+ if (!new_state->crtc) {
+ if (old_cp == DRM_MODE_CONTENT_PROTECTION_ENABLED)
+ new_state->content_protection = DRM_MODE_CONTENT_PROTECTION_DESIRED;
+ return 0;
+ }
+
+ if (old_cp == new_cp ||
+ (old_cp == DRM_MODE_CONTENT_PROTECTION_DESIRED &&
+ new_cp == DRM_MODE_CONTENT_PROTECTION_ENABLED))
+ return 0;
+
+mode_changed:
+ crtc_state = drm_atomic_get_new_crtc_state(state, new_state->crtc);
+ crtc_state->mode_changed = true;
+
+ return 0;
+}
+
+static const struct drm_connector_helper_funcs cdns_mhdp_conn_helper_funcs = {
+ .detect_ctx = cdns_mhdp_connector_detect,
+ .get_modes = cdns_mhdp_get_modes,
+ .mode_valid = cdns_mhdp_mode_valid,
+ .atomic_check = cdns_mhdp_connector_atomic_check,
+};
+
+static const struct drm_connector_funcs cdns_mhdp_conn_funcs = {
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+ .reset = drm_atomic_helper_connector_reset,
+ .destroy = drm_connector_cleanup,
+};
+
+static int cdns_mhdp_connector_init(struct cdns_mhdp_device *mhdp)
+{
+ u32 bus_format = MEDIA_BUS_FMT_RGB121212_1X36;
+ struct drm_connector *conn = &mhdp->connector;
+ struct drm_bridge *bridge = &mhdp->bridge;
+ int ret;
+
+ if (!bridge->encoder) {
+ dev_err(mhdp->dev, "Parent encoder object not found");
+ return -ENODEV;
+ }
+
+ conn->polled = DRM_CONNECTOR_POLL_HPD;
+
+ ret = drm_connector_init(bridge->dev, conn, &cdns_mhdp_conn_funcs,
+ DRM_MODE_CONNECTOR_DisplayPort);
+ if (ret) {
+ dev_err(mhdp->dev, "Failed to initialize connector with drm\n");
+ return ret;
+ }
+
+ drm_connector_helper_add(conn, &cdns_mhdp_conn_helper_funcs);
+
+ ret = drm_display_info_set_bus_formats(&conn->display_info,
+ &bus_format, 1);
+ if (ret)
+ return ret;
+
+ ret = drm_connector_attach_encoder(conn, bridge->encoder);
+ if (ret) {
+ dev_err(mhdp->dev, "Failed to attach connector to encoder\n");
+ return ret;
+ }
+
+ if (mhdp->hdcp_supported)
+ ret = drm_connector_attach_content_protection_property(conn, true);
+
+ return ret;
+}
+
+static int cdns_mhdp_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct cdns_mhdp_device *mhdp = bridge_to_mhdp(bridge);
+ bool hw_ready;
+ int ret;
+
+ dev_dbg(mhdp->dev, "%s\n", __func__);
+
+ mhdp->aux.drm_dev = bridge->dev;
+ ret = drm_dp_aux_register(&mhdp->aux);
+ if (ret < 0)
+ return ret;
+
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+ ret = cdns_mhdp_connector_init(mhdp);
+ if (ret)
+ goto aux_unregister;
+ }
+
+ spin_lock(&mhdp->start_lock);
+
+ mhdp->bridge_attached = true;
+ hw_ready = mhdp->hw_state == MHDP_HW_READY;
+
+ spin_unlock(&mhdp->start_lock);
+
+ /* Enable SW event interrupts */
+ if (hw_ready)
+ writel(~(u32)CDNS_APB_INT_MASK_SW_EVENT_INT,
+ mhdp->regs + CDNS_APB_INT_MASK);
+
+ return 0;
+aux_unregister:
+ drm_dp_aux_unregister(&mhdp->aux);
+ return ret;
+}
+
+static void cdns_mhdp_configure_video(struct cdns_mhdp_device *mhdp,
+ const struct drm_display_mode *mode)
+{
+ unsigned int dp_framer_sp = 0, msa_horizontal_1,
+ msa_vertical_1, bnd_hsync2vsync, hsync2vsync_pol_ctrl,
+ misc0 = 0, misc1 = 0, pxl_repr,
+ front_porch, back_porch, msa_h0, msa_v0, hsync, vsync,
+ dp_vertical_1;
+ u8 stream_id = mhdp->stream_id;
+ u32 bpp, bpc, pxlfmt, framer;
+ int ret;
+
+ pxlfmt = mhdp->display_fmt.color_format;
+ bpc = mhdp->display_fmt.bpc;
+
+ /*
+ * If YCBCR supported and stream not SD, use ITU709
+ * Need to handle ITU version with YCBCR420 when supported
+ */
+ if ((pxlfmt == DRM_COLOR_FORMAT_YCBCR444 ||
+ pxlfmt == DRM_COLOR_FORMAT_YCBCR422) && mode->crtc_vdisplay >= 720)
+ misc0 = DP_YCBCR_COEFFICIENTS_ITU709;
+
+ bpp = cdns_mhdp_get_bpp(&mhdp->display_fmt);
+
+ switch (pxlfmt) {
+ case DRM_COLOR_FORMAT_RGB444:
+ pxl_repr = CDNS_DP_FRAMER_RGB << CDNS_DP_FRAMER_PXL_FORMAT;
+ misc0 |= DP_COLOR_FORMAT_RGB;
+ break;
+ case DRM_COLOR_FORMAT_YCBCR444:
+ pxl_repr = CDNS_DP_FRAMER_YCBCR444 << CDNS_DP_FRAMER_PXL_FORMAT;
+ misc0 |= DP_COLOR_FORMAT_YCbCr444 | DP_TEST_DYNAMIC_RANGE_CEA;
+ break;
+ case DRM_COLOR_FORMAT_YCBCR422:
+ pxl_repr = CDNS_DP_FRAMER_YCBCR422 << CDNS_DP_FRAMER_PXL_FORMAT;
+ misc0 |= DP_COLOR_FORMAT_YCbCr422 | DP_TEST_DYNAMIC_RANGE_CEA;
+ break;
+ case DRM_COLOR_FORMAT_YCBCR420:
+ pxl_repr = CDNS_DP_FRAMER_YCBCR420 << CDNS_DP_FRAMER_PXL_FORMAT;
+ break;
+ default:
+ pxl_repr = CDNS_DP_FRAMER_Y_ONLY << CDNS_DP_FRAMER_PXL_FORMAT;
+ }
+
+ switch (bpc) {
+ case 6:
+ misc0 |= DP_TEST_BIT_DEPTH_6;
+ pxl_repr |= CDNS_DP_FRAMER_6_BPC;
+ break;
+ case 8:
+ misc0 |= DP_TEST_BIT_DEPTH_8;
+ pxl_repr |= CDNS_DP_FRAMER_8_BPC;
+ break;
+ case 10:
+ misc0 |= DP_TEST_BIT_DEPTH_10;
+ pxl_repr |= CDNS_DP_FRAMER_10_BPC;
+ break;
+ case 12:
+ misc0 |= DP_TEST_BIT_DEPTH_12;
+ pxl_repr |= CDNS_DP_FRAMER_12_BPC;
+ break;
+ case 16:
+ misc0 |= DP_TEST_BIT_DEPTH_16;
+ pxl_repr |= CDNS_DP_FRAMER_16_BPC;
+ break;
+ }
+
+ bnd_hsync2vsync = CDNS_IP_BYPASS_V_INTERFACE;
+ if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+ bnd_hsync2vsync |= CDNS_IP_DET_INTERLACE_FORMAT;
+
+ cdns_mhdp_reg_write(mhdp, CDNS_BND_HSYNC2VSYNC(stream_id),
+ bnd_hsync2vsync);
+
+ hsync2vsync_pol_ctrl = 0;
+ if (mode->flags & DRM_MODE_FLAG_NHSYNC)
+ hsync2vsync_pol_ctrl |= CDNS_H2V_HSYNC_POL_ACTIVE_LOW;
+ if (mode->flags & DRM_MODE_FLAG_NVSYNC)
+ hsync2vsync_pol_ctrl |= CDNS_H2V_VSYNC_POL_ACTIVE_LOW;
+ cdns_mhdp_reg_write(mhdp, CDNS_HSYNC2VSYNC_POL_CTRL(stream_id),
+ hsync2vsync_pol_ctrl);
+
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_PXL_REPR(stream_id), pxl_repr);
+
+ if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+ dp_framer_sp |= CDNS_DP_FRAMER_INTERLACE;
+ if (mode->flags & DRM_MODE_FLAG_NHSYNC)
+ dp_framer_sp |= CDNS_DP_FRAMER_HSYNC_POL_LOW;
+ if (mode->flags & DRM_MODE_FLAG_NVSYNC)
+ dp_framer_sp |= CDNS_DP_FRAMER_VSYNC_POL_LOW;
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_SP(stream_id), dp_framer_sp);
+
+ front_porch = mode->crtc_hsync_start - mode->crtc_hdisplay;
+ back_porch = mode->crtc_htotal - mode->crtc_hsync_end;
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_FRONT_BACK_PORCH(stream_id),
+ CDNS_DP_FRONT_PORCH(front_porch) |
+ CDNS_DP_BACK_PORCH(back_porch));
+
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_BYTE_COUNT(stream_id),
+ mode->crtc_hdisplay * bpp / 8);
+
+ msa_h0 = mode->crtc_htotal - mode->crtc_hsync_start;
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_MSA_HORIZONTAL_0(stream_id),
+ CDNS_DP_MSAH0_H_TOTAL(mode->crtc_htotal) |
+ CDNS_DP_MSAH0_HSYNC_START(msa_h0));
+
+ hsync = mode->crtc_hsync_end - mode->crtc_hsync_start;
+ msa_horizontal_1 = CDNS_DP_MSAH1_HSYNC_WIDTH(hsync) |
+ CDNS_DP_MSAH1_HDISP_WIDTH(mode->crtc_hdisplay);
+ if (mode->flags & DRM_MODE_FLAG_NHSYNC)
+ msa_horizontal_1 |= CDNS_DP_MSAH1_HSYNC_POL_LOW;
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_MSA_HORIZONTAL_1(stream_id),
+ msa_horizontal_1);
+
+ msa_v0 = mode->crtc_vtotal - mode->crtc_vsync_start;
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_MSA_VERTICAL_0(stream_id),
+ CDNS_DP_MSAV0_V_TOTAL(mode->crtc_vtotal) |
+ CDNS_DP_MSAV0_VSYNC_START(msa_v0));
+
+ vsync = mode->crtc_vsync_end - mode->crtc_vsync_start;
+ msa_vertical_1 = CDNS_DP_MSAV1_VSYNC_WIDTH(vsync) |
+ CDNS_DP_MSAV1_VDISP_WIDTH(mode->crtc_vdisplay);
+ if (mode->flags & DRM_MODE_FLAG_NVSYNC)
+ msa_vertical_1 |= CDNS_DP_MSAV1_VSYNC_POL_LOW;
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_MSA_VERTICAL_1(stream_id),
+ msa_vertical_1);
+
+ if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
+ mode->crtc_vtotal % 2 == 0)
+ misc1 = DP_TEST_INTERLACED;
+ if (mhdp->display_fmt.y_only)
+ misc1 |= CDNS_DP_TEST_COLOR_FORMAT_RAW_Y_ONLY;
+ /* Use VSC SDP for Y420 */
+ if (pxlfmt == DRM_COLOR_FORMAT_YCBCR420)
+ misc1 = CDNS_DP_TEST_VSC_SDP;
+
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_MSA_MISC(stream_id),
+ misc0 | (misc1 << 8));
+
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_HORIZONTAL(stream_id),
+ CDNS_DP_H_HSYNC_WIDTH(hsync) |
+ CDNS_DP_H_H_TOTAL(mode->crtc_hdisplay));
+
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_VERTICAL_0(stream_id),
+ CDNS_DP_V0_VHEIGHT(mode->crtc_vdisplay) |
+ CDNS_DP_V0_VSTART(msa_v0));
+
+ dp_vertical_1 = CDNS_DP_V1_VTOTAL(mode->crtc_vtotal);
+ if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
+ mode->crtc_vtotal % 2 == 0)
+ dp_vertical_1 |= CDNS_DP_V1_VTOTAL_EVEN;
+
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_VERTICAL_1(stream_id), dp_vertical_1);
+
+ cdns_mhdp_reg_write_bit(mhdp, CDNS_DP_VB_ID(stream_id), 2, 1,
+ (mode->flags & DRM_MODE_FLAG_INTERLACE) ?
+ CDNS_DP_VB_ID_INTERLACED : 0);
+
+ ret = cdns_mhdp_reg_read(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, &framer);
+ if (ret < 0) {
+ dev_err(mhdp->dev,
+ "Failed to read CDNS_DP_FRAMER_GLOBAL_CONFIG %d\n",
+ ret);
+ return;
+ }
+ framer |= CDNS_DP_FRAMER_EN;
+ framer &= ~CDNS_DP_NO_VIDEO_MODE;
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, framer);
+}
+
+static void cdns_mhdp_sst_enable(struct cdns_mhdp_device *mhdp,
+ const struct drm_display_mode *mode)
+{
+ u32 rate, vs, required_bandwidth, available_bandwidth;
+ s32 line_thresh1, line_thresh2, line_thresh = 0;
+ int pxlclock = mode->crtc_clock;
+ u32 tu_size = 64;
+ u32 bpp;
+
+ /* Get rate in MSymbols per second per lane */
+ rate = mhdp->link.rate / 1000;
+
+ bpp = cdns_mhdp_get_bpp(&mhdp->display_fmt);
+
+ required_bandwidth = pxlclock * bpp / 8;
+ available_bandwidth = mhdp->link.num_lanes * rate;
+
+ vs = tu_size * required_bandwidth / available_bandwidth;
+ vs /= 1000;
+
+ if (vs == tu_size)
+ vs = tu_size - 1;
+
+ line_thresh1 = ((vs + 1) << 5) * 8 / bpp;
+ line_thresh2 = (pxlclock << 5) / 1000 / rate * (vs + 1) - (1 << 5);
+ line_thresh = line_thresh1 - line_thresh2 / (s32)mhdp->link.num_lanes;
+ line_thresh = (line_thresh >> 5) + 2;
+
+ mhdp->stream_id = 0;
+
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_TU,
+ CDNS_DP_FRAMER_TU_VS(vs) |
+ CDNS_DP_FRAMER_TU_SIZE(tu_size) |
+ CDNS_DP_FRAMER_TU_CNT_RST_EN);
+
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_LINE_THRESH(0),
+ line_thresh & GENMASK(5, 0));
+
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_STREAM_CONFIG_2(0),
+ CDNS_DP_SC2_TU_VS_DIFF((tu_size - vs > 3) ?
+ 0 : tu_size - vs));
+
+ cdns_mhdp_configure_video(mhdp, mode);
+}
+
+static void cdns_mhdp_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state)
+{
+ struct cdns_mhdp_device *mhdp = bridge_to_mhdp(bridge);
+ struct drm_atomic_state *state = bridge_state->base.state;
+ struct cdns_mhdp_bridge_state *mhdp_state;
+ struct drm_crtc_state *crtc_state;
+ struct drm_connector *connector;
+ struct drm_connector_state *conn_state;
+ struct drm_bridge_state *new_state;
+ const struct drm_display_mode *mode;
+ u32 resp;
+ int ret;
+
+ dev_dbg(mhdp->dev, "bridge enable\n");
+
+ mutex_lock(&mhdp->link_mutex);
+
+ if (mhdp->plugged && !mhdp->link_up) {
+ ret = cdns_mhdp_link_up(mhdp);
+ if (ret < 0)
+ goto out;
+ }
+
+ if (mhdp->info && mhdp->info->ops && mhdp->info->ops->enable)
+ mhdp->info->ops->enable(mhdp);
+
+ /* Enable VIF clock for stream 0 */
+ ret = cdns_mhdp_reg_read(mhdp, CDNS_DPTX_CAR, &resp);
+ if (ret < 0) {
+ dev_err(mhdp->dev, "Failed to read CDNS_DPTX_CAR %d\n", ret);
+ goto out;
+ }
+
+ cdns_mhdp_reg_write(mhdp, CDNS_DPTX_CAR,
+ resp | CDNS_VIF_CLK_EN | CDNS_VIF_CLK_RSTN);
+
+ connector = drm_atomic_get_new_connector_for_encoder(state,
+ bridge->encoder);
+ if (WARN_ON(!connector))
+ goto out;
+
+ conn_state = drm_atomic_get_new_connector_state(state, connector);
+ if (WARN_ON(!conn_state))
+ goto out;
+
+ if (mhdp->hdcp_supported &&
+ mhdp->hw_state == MHDP_HW_READY &&
+ conn_state->content_protection ==
+ DRM_MODE_CONTENT_PROTECTION_DESIRED) {
+ mutex_unlock(&mhdp->link_mutex);
+ cdns_mhdp_hdcp_enable(mhdp, conn_state->hdcp_content_type);
+ mutex_lock(&mhdp->link_mutex);
+ }
+
+ crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
+ if (WARN_ON(!crtc_state))
+ goto out;
+
+ mode = &crtc_state->adjusted_mode;
+
+ new_state = drm_atomic_get_new_bridge_state(state, bridge);
+ if (WARN_ON(!new_state))
+ goto out;
+
+ if (!cdns_mhdp_bandwidth_ok(mhdp, mode, mhdp->link.num_lanes,
+ mhdp->link.rate)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ cdns_mhdp_sst_enable(mhdp, mode);
+
+ mhdp_state = to_cdns_mhdp_bridge_state(new_state);
+
+ mhdp_state->current_mode = drm_mode_duplicate(bridge->dev, mode);
+ drm_mode_set_name(mhdp_state->current_mode);
+
+ dev_dbg(mhdp->dev, "%s: Enabling mode %s\n", __func__, mode->name);
+
+ mhdp->bridge_enabled = true;
+
+out:
+ mutex_unlock(&mhdp->link_mutex);
+ if (ret < 0)
+ schedule_work(&mhdp->modeset_retry_work);
+}
+
+static void cdns_mhdp_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state)
+{
+ struct cdns_mhdp_device *mhdp = bridge_to_mhdp(bridge);
+ u32 resp;
+
+ dev_dbg(mhdp->dev, "%s\n", __func__);
+
+ mutex_lock(&mhdp->link_mutex);
+
+ if (mhdp->hdcp_supported)
+ cdns_mhdp_hdcp_disable(mhdp);
+
+ mhdp->bridge_enabled = false;
+ cdns_mhdp_reg_read(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, &resp);
+ resp &= ~CDNS_DP_FRAMER_EN;
+ resp |= CDNS_DP_NO_VIDEO_MODE;
+ cdns_mhdp_reg_write(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, resp);
+
+ cdns_mhdp_link_down(mhdp);
+
+ /* Disable VIF clock for stream 0 */
+ cdns_mhdp_reg_read(mhdp, CDNS_DPTX_CAR, &resp);
+ cdns_mhdp_reg_write(mhdp, CDNS_DPTX_CAR,
+ resp & ~(CDNS_VIF_CLK_EN | CDNS_VIF_CLK_RSTN));
+
+ if (mhdp->info && mhdp->info->ops && mhdp->info->ops->disable)
+ mhdp->info->ops->disable(mhdp);
+
+ mutex_unlock(&mhdp->link_mutex);
+}
+
+static void cdns_mhdp_detach(struct drm_bridge *bridge)
+{
+ struct cdns_mhdp_device *mhdp = bridge_to_mhdp(bridge);
+
+ dev_dbg(mhdp->dev, "%s\n", __func__);
+
+ drm_dp_aux_unregister(&mhdp->aux);
+
+ spin_lock(&mhdp->start_lock);
+
+ mhdp->bridge_attached = false;
+
+ spin_unlock(&mhdp->start_lock);
+
+ writel(~0, mhdp->regs + CDNS_APB_INT_MASK);
+}
+
+static struct drm_bridge_state *
+cdns_mhdp_bridge_atomic_duplicate_state(struct drm_bridge *bridge)
+{
+ struct cdns_mhdp_bridge_state *state;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return NULL;
+
+ __drm_atomic_helper_bridge_duplicate_state(bridge, &state->base);
+
+ return &state->base;
+}
+
+static void
+cdns_mhdp_bridge_atomic_destroy_state(struct drm_bridge *bridge,
+ struct drm_bridge_state *state)
+{
+ struct cdns_mhdp_bridge_state *cdns_mhdp_state;
+
+ cdns_mhdp_state = to_cdns_mhdp_bridge_state(state);
+
+ if (cdns_mhdp_state->current_mode) {
+ drm_mode_destroy(bridge->dev, cdns_mhdp_state->current_mode);
+ cdns_mhdp_state->current_mode = NULL;
+ }
+
+ kfree(cdns_mhdp_state);
+}
+
+static struct drm_bridge_state *
+cdns_mhdp_bridge_atomic_reset(struct drm_bridge *bridge)
+{
+ struct cdns_mhdp_bridge_state *cdns_mhdp_state;
+
+ cdns_mhdp_state = kzalloc(sizeof(*cdns_mhdp_state), GFP_KERNEL);
+ if (!cdns_mhdp_state)
+ return NULL;
+
+ __drm_atomic_helper_bridge_reset(bridge, &cdns_mhdp_state->base);
+
+ return &cdns_mhdp_state->base;
+}
+
+static int cdns_mhdp_atomic_check(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct cdns_mhdp_device *mhdp = bridge_to_mhdp(bridge);
+ const struct drm_display_mode *mode = &crtc_state->adjusted_mode;
+
+ mutex_lock(&mhdp->link_mutex);
+
+ if (!cdns_mhdp_bandwidth_ok(mhdp, mode, mhdp->link.num_lanes,
+ mhdp->link.rate)) {
+ dev_err(mhdp->dev, "%s: Not enough BW for %s (%u lanes at %u Mbps)\n",
+ __func__, mode->name, mhdp->link.num_lanes,
+ mhdp->link.rate / 100);
+ mutex_unlock(&mhdp->link_mutex);
+ return -EINVAL;
+ }
+
+ mutex_unlock(&mhdp->link_mutex);
+ return 0;
+}
+
+static enum drm_connector_status cdns_mhdp_bridge_detect(struct drm_bridge *bridge)
+{
+ struct cdns_mhdp_device *mhdp = bridge_to_mhdp(bridge);
+
+ return cdns_mhdp_detect(mhdp);
+}
+
+static struct edid *cdns_mhdp_bridge_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct cdns_mhdp_device *mhdp = bridge_to_mhdp(bridge);
+
+ return cdns_mhdp_get_edid(mhdp, connector);
+}
+
+static void cdns_mhdp_bridge_hpd_enable(struct drm_bridge *bridge)
+{
+ struct cdns_mhdp_device *mhdp = bridge_to_mhdp(bridge);
+
+ /* Enable SW event interrupts */
+ if (mhdp->bridge_attached)
+ writel(~(u32)CDNS_APB_INT_MASK_SW_EVENT_INT,
+ mhdp->regs + CDNS_APB_INT_MASK);
+}
+
+static void cdns_mhdp_bridge_hpd_disable(struct drm_bridge *bridge)
+{
+ struct cdns_mhdp_device *mhdp = bridge_to_mhdp(bridge);
+
+ writel(CDNS_APB_INT_MASK_SW_EVENT_INT, mhdp->regs + CDNS_APB_INT_MASK);
+}
+
+static const struct drm_bridge_funcs cdns_mhdp_bridge_funcs = {
+ .atomic_enable = cdns_mhdp_atomic_enable,
+ .atomic_disable = cdns_mhdp_atomic_disable,
+ .atomic_check = cdns_mhdp_atomic_check,
+ .attach = cdns_mhdp_attach,
+ .detach = cdns_mhdp_detach,
+ .atomic_duplicate_state = cdns_mhdp_bridge_atomic_duplicate_state,
+ .atomic_destroy_state = cdns_mhdp_bridge_atomic_destroy_state,
+ .atomic_reset = cdns_mhdp_bridge_atomic_reset,
+ .detect = cdns_mhdp_bridge_detect,
+ .get_edid = cdns_mhdp_bridge_get_edid,
+ .hpd_enable = cdns_mhdp_bridge_hpd_enable,
+ .hpd_disable = cdns_mhdp_bridge_hpd_disable,
+};
+
+static bool cdns_mhdp_detect_hpd(struct cdns_mhdp_device *mhdp, bool *hpd_pulse)
+{
+ int hpd_event, hpd_status;
+
+ *hpd_pulse = false;
+
+ hpd_event = cdns_mhdp_read_hpd_event(mhdp);
+
+ /* Getting event bits failed, bail out */
+ if (hpd_event < 0) {
+ dev_warn(mhdp->dev, "%s: read event failed: %d\n",
+ __func__, hpd_event);
+ return false;
+ }
+
+ hpd_status = cdns_mhdp_get_hpd_status(mhdp);
+ if (hpd_status < 0) {
+ dev_warn(mhdp->dev, "%s: get hpd status failed: %d\n",
+ __func__, hpd_status);
+ return false;
+ }
+
+ if (hpd_event & DPTX_READ_EVENT_HPD_PULSE)
+ *hpd_pulse = true;
+
+ return !!hpd_status;
+}
+
+static int cdns_mhdp_update_link_status(struct cdns_mhdp_device *mhdp)
+{
+ struct cdns_mhdp_bridge_state *cdns_bridge_state;
+ struct drm_display_mode *current_mode;
+ bool old_plugged = mhdp->plugged;
+ struct drm_bridge_state *state;
+ u8 status[DP_LINK_STATUS_SIZE];
+ bool hpd_pulse;
+ int ret = 0;
+
+ mutex_lock(&mhdp->link_mutex);
+
+ mhdp->plugged = cdns_mhdp_detect_hpd(mhdp, &hpd_pulse);
+
+ if (!mhdp->plugged) {
+ cdns_mhdp_link_down(mhdp);
+ mhdp->link.rate = mhdp->host.link_rate;
+ mhdp->link.num_lanes = mhdp->host.lanes_cnt;
+ goto out;
+ }
+
+ /*
+ * If we get a HPD pulse event and we were and still are connected,
+ * check the link status. If link status is ok, there's nothing to do
+ * as we don't handle DP interrupts. If link status is bad, continue
+ * with full link setup.
+ */
+ if (hpd_pulse && old_plugged == mhdp->plugged) {
+ ret = drm_dp_dpcd_read_link_status(&mhdp->aux, status);
+
+ /*
+ * If everything looks fine, just return, as we don't handle
+ * DP IRQs.
+ */
+ if (ret > 0 &&
+ drm_dp_channel_eq_ok(status, mhdp->link.num_lanes) &&
+ drm_dp_clock_recovery_ok(status, mhdp->link.num_lanes))
+ goto out;
+
+ /* If link is bad, mark link as down so that we do a new LT */
+ mhdp->link_up = false;
+ }
+
+ if (!mhdp->link_up) {
+ ret = cdns_mhdp_link_up(mhdp);
+ if (ret < 0)
+ goto out;
+ }
+
+ if (mhdp->bridge_enabled) {
+ state = drm_priv_to_bridge_state(mhdp->bridge.base.state);
+ if (!state) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ cdns_bridge_state = to_cdns_mhdp_bridge_state(state);
+ if (!cdns_bridge_state) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ current_mode = cdns_bridge_state->current_mode;
+ if (!current_mode) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (!cdns_mhdp_bandwidth_ok(mhdp, current_mode, mhdp->link.num_lanes,
+ mhdp->link.rate)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ dev_dbg(mhdp->dev, "%s: Enabling mode %s\n", __func__,
+ current_mode->name);
+
+ cdns_mhdp_sst_enable(mhdp, current_mode);
+ }
+out:
+ mutex_unlock(&mhdp->link_mutex);
+ return ret;
+}
+
+static void cdns_mhdp_modeset_retry_fn(struct work_struct *work)
+{
+ struct cdns_mhdp_device *mhdp;
+ struct drm_connector *conn;
+
+ mhdp = container_of(work, typeof(*mhdp), modeset_retry_work);
+
+ conn = &mhdp->connector;
+
+ /* Grab the locks before changing connector property */
+ mutex_lock(&conn->dev->mode_config.mutex);
+
+ /*
+ * Set connector link status to BAD and send a Uevent to notify
+ * userspace to do a modeset.
+ */
+ drm_connector_set_link_status_property(conn, DRM_MODE_LINK_STATUS_BAD);
+ mutex_unlock(&conn->dev->mode_config.mutex);
+
+ /* Send Hotplug uevent so userspace can reprobe */
+ drm_kms_helper_hotplug_event(mhdp->bridge.dev);
+}
+
+static irqreturn_t cdns_mhdp_irq_handler(int irq, void *data)
+{
+ struct cdns_mhdp_device *mhdp = data;
+ u32 apb_stat, sw_ev0;
+ bool bridge_attached;
+
+ apb_stat = readl(mhdp->regs + CDNS_APB_INT_STATUS);
+ if (!(apb_stat & CDNS_APB_INT_MASK_SW_EVENT_INT))
+ return IRQ_NONE;
+
+ sw_ev0 = readl(mhdp->regs + CDNS_SW_EVENT0);
+
+ /*
+ * Calling drm_kms_helper_hotplug_event() when not attached
+ * to drm device causes an oops because the drm_bridge->dev
+ * is NULL. See cdns_mhdp_fw_cb() comments for details about the
+ * problems related drm_kms_helper_hotplug_event() call.
+ */
+ spin_lock(&mhdp->start_lock);
+ bridge_attached = mhdp->bridge_attached;
+ spin_unlock(&mhdp->start_lock);
+
+ if (bridge_attached && (sw_ev0 & CDNS_DPTX_HPD)) {
+ schedule_work(&mhdp->hpd_work);
+ }
+
+ if (sw_ev0 & ~CDNS_DPTX_HPD) {
+ mhdp->sw_events |= (sw_ev0 & ~CDNS_DPTX_HPD);
+ wake_up(&mhdp->sw_events_wq);
+ }
+
+ return IRQ_HANDLED;
+}
+
+u32 cdns_mhdp_wait_for_sw_event(struct cdns_mhdp_device *mhdp, u32 event)
+{
+ u32 ret;
+
+ ret = wait_event_timeout(mhdp->sw_events_wq,
+ mhdp->sw_events & event,
+ msecs_to_jiffies(500));
+ if (!ret) {
+ dev_dbg(mhdp->dev, "SW event 0x%x timeout\n", event);
+ goto sw_event_out;
+ }
+
+ ret = mhdp->sw_events;
+ mhdp->sw_events &= ~event;
+
+sw_event_out:
+ return ret;
+}
+
+static void cdns_mhdp_hpd_work(struct work_struct *work)
+{
+ struct cdns_mhdp_device *mhdp = container_of(work,
+ struct cdns_mhdp_device,
+ hpd_work);
+ int ret;
+
+ ret = cdns_mhdp_update_link_status(mhdp);
+ if (mhdp->connector.dev) {
+ if (ret < 0)
+ schedule_work(&mhdp->modeset_retry_work);
+ else
+ drm_kms_helper_hotplug_event(mhdp->bridge.dev);
+ } else {
+ drm_bridge_hpd_notify(&mhdp->bridge, cdns_mhdp_detect(mhdp));
+ }
+}
+
+static int cdns_mhdp_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct cdns_mhdp_device *mhdp;
+ unsigned long rate;
+ struct clk *clk;
+ int ret;
+ int irq;
+
+ mhdp = devm_kzalloc(dev, sizeof(*mhdp), GFP_KERNEL);
+ if (!mhdp)
+ return -ENOMEM;
+
+ clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(clk)) {
+ dev_err(dev, "couldn't get clk: %ld\n", PTR_ERR(clk));
+ return PTR_ERR(clk);
+ }
+
+ mhdp->clk = clk;
+ mhdp->dev = dev;
+ mutex_init(&mhdp->mbox_mutex);
+ mutex_init(&mhdp->link_mutex);
+ spin_lock_init(&mhdp->start_lock);
+
+ drm_dp_aux_init(&mhdp->aux);
+ mhdp->aux.dev = dev;
+ mhdp->aux.transfer = cdns_mhdp_transfer;
+
+ mhdp->regs = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(mhdp->regs)) {
+ dev_err(dev, "Failed to get memory resource\n");
+ return PTR_ERR(mhdp->regs);
+ }
+
+ mhdp->sapb_regs = devm_platform_ioremap_resource_byname(pdev, "mhdptx-sapb");
+ if (IS_ERR(mhdp->sapb_regs)) {
+ mhdp->hdcp_supported = false;
+ dev_warn(dev,
+ "Failed to get SAPB memory resource, HDCP not supported\n");
+ } else {
+ mhdp->hdcp_supported = true;
+ }
+
+ mhdp->phy = devm_of_phy_get_by_index(dev, pdev->dev.of_node, 0);
+ if (IS_ERR(mhdp->phy)) {
+ dev_err(dev, "no PHY configured\n");
+ return PTR_ERR(mhdp->phy);
+ }
+
+ platform_set_drvdata(pdev, mhdp);
+
+ mhdp->info = of_device_get_match_data(dev);
+
+ clk_prepare_enable(clk);
+
+ pm_runtime_enable(dev);
+ ret = pm_runtime_resume_and_get(dev);
+ if (ret < 0) {
+ dev_err(dev, "pm_runtime_resume_and_get failed\n");
+ pm_runtime_disable(dev);
+ goto clk_disable;
+ }
+
+ if (mhdp->info && mhdp->info->ops && mhdp->info->ops->init) {
+ ret = mhdp->info->ops->init(mhdp);
+ if (ret != 0) {
+ dev_err(dev, "MHDP platform initialization failed: %d\n",
+ ret);
+ goto runtime_put;
+ }
+ }
+
+ rate = clk_get_rate(clk);
+ writel(rate % 1000000, mhdp->regs + CDNS_SW_CLK_L);
+ writel(rate / 1000000, mhdp->regs + CDNS_SW_CLK_H);
+
+ dev_dbg(dev, "func clk rate %lu Hz\n", rate);
+
+ writel(~0, mhdp->regs + CDNS_APB_INT_MASK);
+
+ irq = platform_get_irq(pdev, 0);
+ ret = devm_request_threaded_irq(mhdp->dev, irq, NULL,
+ cdns_mhdp_irq_handler, IRQF_ONESHOT,
+ "mhdp8546", mhdp);
+ if (ret) {
+ dev_err(dev, "cannot install IRQ %d\n", irq);
+ ret = -EIO;
+ goto plat_fini;
+ }
+
+ cdns_mhdp_fill_host_caps(mhdp);
+
+ /* Initialize link rate and num of lanes to host values */
+ mhdp->link.rate = mhdp->host.link_rate;
+ mhdp->link.num_lanes = mhdp->host.lanes_cnt;
+
+ /* The only currently supported format */
+ mhdp->display_fmt.y_only = false;
+ mhdp->display_fmt.color_format = DRM_COLOR_FORMAT_RGB444;
+ mhdp->display_fmt.bpc = 8;
+
+ mhdp->bridge.of_node = pdev->dev.of_node;
+ mhdp->bridge.funcs = &cdns_mhdp_bridge_funcs;
+ mhdp->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
+ DRM_BRIDGE_OP_HPD;
+ mhdp->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
+ if (mhdp->info)
+ mhdp->bridge.timings = mhdp->info->timings;
+
+ ret = phy_init(mhdp->phy);
+ if (ret) {
+ dev_err(mhdp->dev, "Failed to initialize PHY: %d\n", ret);
+ goto plat_fini;
+ }
+
+ /* Initialize the work for modeset in case of link train failure */
+ INIT_WORK(&mhdp->modeset_retry_work, cdns_mhdp_modeset_retry_fn);
+ INIT_WORK(&mhdp->hpd_work, cdns_mhdp_hpd_work);
+
+ init_waitqueue_head(&mhdp->fw_load_wq);
+ init_waitqueue_head(&mhdp->sw_events_wq);
+
+ ret = cdns_mhdp_load_firmware(mhdp);
+ if (ret)
+ goto phy_exit;
+
+ if (mhdp->hdcp_supported)
+ cdns_mhdp_hdcp_init(mhdp);
+
+ drm_bridge_add(&mhdp->bridge);
+
+ return 0;
+
+phy_exit:
+ phy_exit(mhdp->phy);
+plat_fini:
+ if (mhdp->info && mhdp->info->ops && mhdp->info->ops->exit)
+ mhdp->info->ops->exit(mhdp);
+runtime_put:
+ pm_runtime_put_sync(dev);
+ pm_runtime_disable(dev);
+clk_disable:
+ clk_disable_unprepare(mhdp->clk);
+
+ return ret;
+}
+
+static int cdns_mhdp_remove(struct platform_device *pdev)
+{
+ struct cdns_mhdp_device *mhdp = platform_get_drvdata(pdev);
+ unsigned long timeout = msecs_to_jiffies(100);
+ bool stop_fw = false;
+ int ret;
+
+ drm_bridge_remove(&mhdp->bridge);
+
+ ret = wait_event_timeout(mhdp->fw_load_wq,
+ mhdp->hw_state == MHDP_HW_READY,
+ timeout);
+ if (ret == 0)
+ dev_err(mhdp->dev, "%s: Timeout waiting for fw loading\n",
+ __func__);
+ else
+ stop_fw = true;
+
+ spin_lock(&mhdp->start_lock);
+ mhdp->hw_state = MHDP_HW_STOPPED;
+ spin_unlock(&mhdp->start_lock);
+
+ if (stop_fw)
+ ret = cdns_mhdp_set_firmware_active(mhdp, false);
+
+ phy_exit(mhdp->phy);
+
+ if (mhdp->info && mhdp->info->ops && mhdp->info->ops->exit)
+ mhdp->info->ops->exit(mhdp);
+
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
+ cancel_work_sync(&mhdp->modeset_retry_work);
+ flush_work(&mhdp->hpd_work);
+ /* Ignoring mhdp->hdcp.check_work and mhdp->hdcp.prop_work here. */
+
+ clk_disable_unprepare(mhdp->clk);
+
+ return ret;
+}
+
+static const struct of_device_id mhdp_ids[] = {
+ { .compatible = "cdns,mhdp8546", },
+#ifdef CONFIG_DRM_CDNS_MHDP8546_J721E
+ { .compatible = "ti,j721e-mhdp8546",
+ .data = &(const struct cdns_mhdp_platform_info) {
+ .timings = &mhdp_ti_j721e_bridge_timings,
+ .ops = &mhdp_ti_j721e_ops,
+ },
+ },
+#endif
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mhdp_ids);
+
+static struct platform_driver mhdp_driver = {
+ .driver = {
+ .name = "cdns-mhdp8546",
+ .of_match_table = of_match_ptr(mhdp_ids),
+ },
+ .probe = cdns_mhdp_probe,
+ .remove = cdns_mhdp_remove,
+};
+module_platform_driver(mhdp_driver);
+
+MODULE_FIRMWARE(FW_NAME);
+
+MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>");
+MODULE_AUTHOR("Swapnil Jakhade <sjakhade@cadence.com>");
+MODULE_AUTHOR("Yuti Amonkar <yamonkar@cadence.com>");
+MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
+MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
+MODULE_DESCRIPTION("Cadence MHDP8546 DP bridge driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:cdns-mhdp8546");
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
new file mode 100644
index 000000000..bedddd510
--- /dev/null
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
@@ -0,0 +1,422 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Cadence MHDP8546 DP bridge driver.
+ *
+ * Copyright (C) 2020 Cadence Design Systems, Inc.
+ *
+ * Author: Quentin Schulz <quentin.schulz@free-electrons.com>
+ * Swapnil Jakhade <sjakhade@cadence.com>
+ */
+
+#ifndef CDNS_MHDP8546_CORE_H
+#define CDNS_MHDP8546_CORE_H
+
+#include <linux/bits.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_connector.h>
+
+struct clk;
+struct device;
+struct phy;
+
+/* Register offsets */
+#define CDNS_APB_CTRL 0x00000
+#define CDNS_CPU_STALL BIT(3)
+
+#define CDNS_MAILBOX_FULL 0x00008
+#define CDNS_MAILBOX_EMPTY 0x0000c
+#define CDNS_MAILBOX_TX_DATA 0x00010
+#define CDNS_MAILBOX_RX_DATA 0x00014
+#define CDNS_KEEP_ALIVE 0x00018
+#define CDNS_KEEP_ALIVE_MASK GENMASK(7, 0)
+
+#define CDNS_VER_L 0x0001C
+#define CDNS_VER_H 0x00020
+#define CDNS_LIB_L_ADDR 0x00024
+#define CDNS_LIB_H_ADDR 0x00028
+
+#define CDNS_MB_INT_MASK 0x00034
+#define CDNS_MB_INT_STATUS 0x00038
+
+#define CDNS_SW_CLK_L 0x0003c
+#define CDNS_SW_CLK_H 0x00040
+
+#define CDNS_SW_EVENT0 0x00044
+#define CDNS_DPTX_HPD BIT(0)
+#define CDNS_HDCP_TX_STATUS BIT(4)
+#define CDNS_HDCP2_TX_IS_KM_STORED BIT(5)
+#define CDNS_HDCP2_TX_STORE_KM BIT(6)
+#define CDNS_HDCP_TX_IS_RCVR_ID_VALID BIT(7)
+
+#define CDNS_SW_EVENT1 0x00048
+#define CDNS_SW_EVENT2 0x0004c
+#define CDNS_SW_EVENT3 0x00050
+
+#define CDNS_APB_INT_MASK 0x0006C
+#define CDNS_APB_INT_MASK_MAILBOX_INT BIT(0)
+#define CDNS_APB_INT_MASK_SW_EVENT_INT BIT(1)
+
+#define CDNS_APB_INT_STATUS 0x00070
+
+#define CDNS_DPTX_CAR 0x00904
+#define CDNS_VIF_CLK_EN BIT(0)
+#define CDNS_VIF_CLK_RSTN BIT(1)
+
+#define CDNS_SOURCE_VIDEO_IF(s) (0x00b00 + ((s) * 0x20))
+#define CDNS_BND_HSYNC2VSYNC(s) (CDNS_SOURCE_VIDEO_IF(s) + \
+ 0x00)
+#define CDNS_IP_DTCT_WIN GENMASK(11, 0)
+#define CDNS_IP_DET_INTERLACE_FORMAT BIT(12)
+#define CDNS_IP_BYPASS_V_INTERFACE BIT(13)
+
+#define CDNS_HSYNC2VSYNC_POL_CTRL(s) (CDNS_SOURCE_VIDEO_IF(s) + \
+ 0x10)
+#define CDNS_H2V_HSYNC_POL_ACTIVE_LOW BIT(1)
+#define CDNS_H2V_VSYNC_POL_ACTIVE_LOW BIT(2)
+
+#define CDNS_DPTX_PHY_CONFIG 0x02000
+#define CDNS_PHY_TRAINING_EN BIT(0)
+#define CDNS_PHY_TRAINING_TYPE(x) (((x) & GENMASK(3, 0)) << 1)
+#define CDNS_PHY_SCRAMBLER_BYPASS BIT(5)
+#define CDNS_PHY_ENCODER_BYPASS BIT(6)
+#define CDNS_PHY_SKEW_BYPASS BIT(7)
+#define CDNS_PHY_TRAINING_AUTO BIT(8)
+#define CDNS_PHY_LANE0_SKEW(x) (((x) & GENMASK(2, 0)) << 9)
+#define CDNS_PHY_LANE1_SKEW(x) (((x) & GENMASK(2, 0)) << 12)
+#define CDNS_PHY_LANE2_SKEW(x) (((x) & GENMASK(2, 0)) << 15)
+#define CDNS_PHY_LANE3_SKEW(x) (((x) & GENMASK(2, 0)) << 18)
+#define CDNS_PHY_COMMON_CONFIG (CDNS_PHY_LANE1_SKEW(1) | \
+ CDNS_PHY_LANE2_SKEW(2) | \
+ CDNS_PHY_LANE3_SKEW(3))
+#define CDNS_PHY_10BIT_EN BIT(21)
+
+#define CDNS_DP_FRAMER_GLOBAL_CONFIG 0x02200
+#define CDNS_DP_NUM_LANES(x) ((x) - 1)
+#define CDNS_DP_MST_EN BIT(2)
+#define CDNS_DP_FRAMER_EN BIT(3)
+#define CDNS_DP_RATE_GOVERNOR_EN BIT(4)
+#define CDNS_DP_NO_VIDEO_MODE BIT(5)
+#define CDNS_DP_DISABLE_PHY_RST BIT(6)
+#define CDNS_DP_WR_FAILING_EDGE_VSYNC BIT(7)
+
+#define CDNS_DP_FRAMER_TU 0x02208
+#define CDNS_DP_FRAMER_TU_SIZE(x) (((x) & GENMASK(6, 0)) << 8)
+#define CDNS_DP_FRAMER_TU_VS(x) ((x) & GENMASK(5, 0))
+#define CDNS_DP_FRAMER_TU_CNT_RST_EN BIT(15)
+
+#define CDNS_DP_MTPH_CONTROL 0x02264
+#define CDNS_DP_MTPH_ECF_EN BIT(0)
+#define CDNS_DP_MTPH_ACT_EN BIT(1)
+#define CDNS_DP_MTPH_LVP_EN BIT(2)
+
+#define CDNS_DP_MTPH_STATUS 0x0226C
+#define CDNS_DP_MTPH_ACT_STATUS BIT(0)
+
+#define CDNS_DP_LANE_EN 0x02300
+#define CDNS_DP_LANE_EN_LANES(x) GENMASK((x) - 1, 0)
+
+#define CDNS_DP_ENHNCD 0x02304
+
+#define CDNS_DPTX_STREAM(s) (0x03000 + (s) * 0x80)
+#define CDNS_DP_MSA_HORIZONTAL_0(s) (CDNS_DPTX_STREAM(s) + 0x00)
+#define CDNS_DP_MSAH0_H_TOTAL(x) (x)
+#define CDNS_DP_MSAH0_HSYNC_START(x) ((x) << 16)
+
+#define CDNS_DP_MSA_HORIZONTAL_1(s) (CDNS_DPTX_STREAM(s) + 0x04)
+#define CDNS_DP_MSAH1_HSYNC_WIDTH(x) (x)
+#define CDNS_DP_MSAH1_HSYNC_POL_LOW BIT(15)
+#define CDNS_DP_MSAH1_HDISP_WIDTH(x) ((x) << 16)
+
+#define CDNS_DP_MSA_VERTICAL_0(s) (CDNS_DPTX_STREAM(s) + 0x08)
+#define CDNS_DP_MSAV0_V_TOTAL(x) (x)
+#define CDNS_DP_MSAV0_VSYNC_START(x) ((x) << 16)
+
+#define CDNS_DP_MSA_VERTICAL_1(s) (CDNS_DPTX_STREAM(s) + 0x0c)
+#define CDNS_DP_MSAV1_VSYNC_WIDTH(x) (x)
+#define CDNS_DP_MSAV1_VSYNC_POL_LOW BIT(15)
+#define CDNS_DP_MSAV1_VDISP_WIDTH(x) ((x) << 16)
+
+#define CDNS_DP_MSA_MISC(s) (CDNS_DPTX_STREAM(s) + 0x10)
+#define CDNS_DP_STREAM_CONFIG(s) (CDNS_DPTX_STREAM(s) + 0x14)
+#define CDNS_DP_STREAM_CONFIG_2(s) (CDNS_DPTX_STREAM(s) + 0x2c)
+#define CDNS_DP_SC2_TU_VS_DIFF(x) ((x) << 8)
+
+#define CDNS_DP_HORIZONTAL(s) (CDNS_DPTX_STREAM(s) + 0x30)
+#define CDNS_DP_H_HSYNC_WIDTH(x) (x)
+#define CDNS_DP_H_H_TOTAL(x) ((x) << 16)
+
+#define CDNS_DP_VERTICAL_0(s) (CDNS_DPTX_STREAM(s) + 0x34)
+#define CDNS_DP_V0_VHEIGHT(x) (x)
+#define CDNS_DP_V0_VSTART(x) ((x) << 16)
+
+#define CDNS_DP_VERTICAL_1(s) (CDNS_DPTX_STREAM(s) + 0x38)
+#define CDNS_DP_V1_VTOTAL(x) (x)
+#define CDNS_DP_V1_VTOTAL_EVEN BIT(16)
+
+#define CDNS_DP_MST_SLOT_ALLOCATE(s) (CDNS_DPTX_STREAM(s) + 0x44)
+#define CDNS_DP_S_ALLOC_START_SLOT(x) (x)
+#define CDNS_DP_S_ALLOC_END_SLOT(x) ((x) << 8)
+
+#define CDNS_DP_RATE_GOVERNING(s) (CDNS_DPTX_STREAM(s) + 0x48)
+#define CDNS_DP_RG_TARG_AV_SLOTS_Y(x) (x)
+#define CDNS_DP_RG_TARG_AV_SLOTS_X(x) ((x) << 4)
+#define CDNS_DP_RG_ENABLE BIT(10)
+
+#define CDNS_DP_FRAMER_PXL_REPR(s) (CDNS_DPTX_STREAM(s) + 0x4c)
+#define CDNS_DP_FRAMER_6_BPC BIT(0)
+#define CDNS_DP_FRAMER_8_BPC BIT(1)
+#define CDNS_DP_FRAMER_10_BPC BIT(2)
+#define CDNS_DP_FRAMER_12_BPC BIT(3)
+#define CDNS_DP_FRAMER_16_BPC BIT(4)
+#define CDNS_DP_FRAMER_PXL_FORMAT 0x8
+#define CDNS_DP_FRAMER_RGB BIT(0)
+#define CDNS_DP_FRAMER_YCBCR444 BIT(1)
+#define CDNS_DP_FRAMER_YCBCR422 BIT(2)
+#define CDNS_DP_FRAMER_YCBCR420 BIT(3)
+#define CDNS_DP_FRAMER_Y_ONLY BIT(4)
+
+#define CDNS_DP_FRAMER_SP(s) (CDNS_DPTX_STREAM(s) + 0x50)
+#define CDNS_DP_FRAMER_VSYNC_POL_LOW BIT(0)
+#define CDNS_DP_FRAMER_HSYNC_POL_LOW BIT(1)
+#define CDNS_DP_FRAMER_INTERLACE BIT(2)
+
+#define CDNS_DP_LINE_THRESH(s) (CDNS_DPTX_STREAM(s) + 0x64)
+#define CDNS_DP_ACTIVE_LINE_THRESH(x) (x)
+
+#define CDNS_DP_VB_ID(s) (CDNS_DPTX_STREAM(s) + 0x68)
+#define CDNS_DP_VB_ID_INTERLACED BIT(2)
+#define CDNS_DP_VB_ID_COMPRESSED BIT(6)
+
+#define CDNS_DP_FRONT_BACK_PORCH(s) (CDNS_DPTX_STREAM(s) + 0x78)
+#define CDNS_DP_BACK_PORCH(x) (x)
+#define CDNS_DP_FRONT_PORCH(x) ((x) << 16)
+
+#define CDNS_DP_BYTE_COUNT(s) (CDNS_DPTX_STREAM(s) + 0x7c)
+#define CDNS_DP_BYTE_COUNT_BYTES_IN_CHUNK_SHIFT 16
+
+/* mailbox */
+#define MAILBOX_RETRY_US 1000
+#define MAILBOX_TIMEOUT_US 2000000
+
+#define MB_OPCODE_ID 0
+#define MB_MODULE_ID 1
+#define MB_SIZE_MSB_ID 2
+#define MB_SIZE_LSB_ID 3
+#define MB_DATA_ID 4
+
+#define MB_MODULE_ID_DP_TX 0x01
+#define MB_MODULE_ID_HDCP_TX 0x07
+#define MB_MODULE_ID_HDCP_RX 0x08
+#define MB_MODULE_ID_HDCP_GENERAL 0x09
+#define MB_MODULE_ID_GENERAL 0x0a
+
+/* firmware and opcodes */
+#define FW_NAME "cadence/mhdp8546.bin"
+#define CDNS_MHDP_IMEM 0x10000
+
+#define GENERAL_MAIN_CONTROL 0x01
+#define GENERAL_TEST_ECHO 0x02
+#define GENERAL_BUS_SETTINGS 0x03
+#define GENERAL_TEST_ACCESS 0x04
+#define GENERAL_REGISTER_READ 0x07
+
+#define DPTX_SET_POWER_MNG 0x00
+#define DPTX_GET_EDID 0x02
+#define DPTX_READ_DPCD 0x03
+#define DPTX_WRITE_DPCD 0x04
+#define DPTX_ENABLE_EVENT 0x05
+#define DPTX_WRITE_REGISTER 0x06
+#define DPTX_READ_REGISTER 0x07
+#define DPTX_WRITE_FIELD 0x08
+#define DPTX_READ_EVENT 0x0a
+#define DPTX_GET_LAST_AUX_STAUS 0x0e
+#define DPTX_HPD_STATE 0x11
+#define DPTX_ADJUST_LT 0x12
+
+#define FW_STANDBY 0
+#define FW_ACTIVE 1
+
+/* HPD */
+#define DPTX_READ_EVENT_HPD_TO_HIGH BIT(0)
+#define DPTX_READ_EVENT_HPD_TO_LOW BIT(1)
+#define DPTX_READ_EVENT_HPD_PULSE BIT(2)
+#define DPTX_READ_EVENT_HPD_STATE BIT(3)
+
+/* general */
+#define CDNS_DP_TRAINING_PATTERN_4 0x7
+
+#define CDNS_KEEP_ALIVE_TIMEOUT 2000
+
+#define CDNS_VOLT_SWING(x) ((x) & GENMASK(1, 0))
+#define CDNS_FORCE_VOLT_SWING BIT(2)
+
+#define CDNS_PRE_EMPHASIS(x) ((x) & GENMASK(1, 0))
+#define CDNS_FORCE_PRE_EMPHASIS BIT(2)
+
+#define CDNS_SUPPORT_TPS(x) BIT((x) - 1)
+
+#define CDNS_FAST_LINK_TRAINING BIT(0)
+
+#define CDNS_LANE_MAPPING_TYPE_C_LANE_0(x) ((x) & GENMASK(1, 0))
+#define CDNS_LANE_MAPPING_TYPE_C_LANE_1(x) ((x) & GENMASK(3, 2))
+#define CDNS_LANE_MAPPING_TYPE_C_LANE_2(x) ((x) & GENMASK(5, 4))
+#define CDNS_LANE_MAPPING_TYPE_C_LANE_3(x) ((x) & GENMASK(7, 6))
+#define CDNS_LANE_MAPPING_NORMAL 0xe4
+#define CDNS_LANE_MAPPING_FLIPPED 0x1b
+
+#define CDNS_DP_MAX_NUM_LANES 4
+#define CDNS_DP_TEST_VSC_SDP BIT(6) /* 1.3+ */
+#define CDNS_DP_TEST_COLOR_FORMAT_RAW_Y_ONLY BIT(7)
+
+#define CDNS_MHDP_MAX_STREAMS 4
+
+#define DP_LINK_CAP_ENHANCED_FRAMING BIT(0)
+
+struct cdns_mhdp_link {
+ unsigned char revision;
+ unsigned int rate;
+ unsigned int num_lanes;
+ unsigned long capabilities;
+};
+
+struct cdns_mhdp_host {
+ unsigned int link_rate;
+ u8 lanes_cnt;
+ u8 volt_swing;
+ u8 pre_emphasis;
+ u8 pattern_supp;
+ u8 lane_mapping;
+ bool fast_link;
+ bool enhanced;
+ bool scrambler;
+ bool ssc;
+};
+
+struct cdns_mhdp_sink {
+ unsigned int link_rate;
+ u8 lanes_cnt;
+ u8 pattern_supp;
+ bool fast_link;
+ bool enhanced;
+ bool ssc;
+};
+
+struct cdns_mhdp_display_fmt {
+ u32 color_format;
+ u32 bpc;
+ bool y_only;
+};
+
+/*
+ * These enums present MHDP hw initialization state
+ * Legal state transitions are:
+ * MHDP_HW_READY <-> MHDP_HW_STOPPED
+ */
+enum mhdp_hw_state {
+ MHDP_HW_READY = 1, /* HW ready, FW active */
+ MHDP_HW_STOPPED /* Driver removal FW to be stopped */
+};
+
+struct cdns_mhdp_device;
+
+struct mhdp_platform_ops {
+ int (*init)(struct cdns_mhdp_device *mhdp);
+ void (*exit)(struct cdns_mhdp_device *mhdp);
+ void (*enable)(struct cdns_mhdp_device *mhdp);
+ void (*disable)(struct cdns_mhdp_device *mhdp);
+};
+
+struct cdns_mhdp_bridge_state {
+ struct drm_bridge_state base;
+ struct drm_display_mode *current_mode;
+};
+
+struct cdns_mhdp_platform_info {
+ const struct drm_bridge_timings *timings;
+ const struct mhdp_platform_ops *ops;
+};
+
+#define to_cdns_mhdp_bridge_state(s) \
+ container_of(s, struct cdns_mhdp_bridge_state, base)
+
+struct cdns_mhdp_hdcp {
+ struct delayed_work check_work;
+ struct work_struct prop_work;
+ struct mutex mutex; /* mutex to protect hdcp.value */
+ u32 value;
+ u8 hdcp_content_type;
+};
+
+struct cdns_mhdp_device {
+ void __iomem *regs;
+ void __iomem *sapb_regs;
+ void __iomem *j721e_regs;
+
+ struct device *dev;
+ struct clk *clk;
+ struct phy *phy;
+
+ const struct cdns_mhdp_platform_info *info;
+
+ /* This is to protect mailbox communications with the firmware */
+ struct mutex mbox_mutex;
+
+ /*
+ * "link_mutex" protects the access to all the link parameters
+ * including the link training process. Link training will be
+ * invoked both from threaded interrupt handler and from atomic
+ * callbacks when link_up is not set. So this mutex protects
+ * flags such as link_up, bridge_enabled, link.num_lanes,
+ * link.rate etc.
+ */
+ struct mutex link_mutex;
+
+ struct drm_connector connector;
+ struct drm_bridge bridge;
+
+ struct cdns_mhdp_link link;
+ struct drm_dp_aux aux;
+
+ struct cdns_mhdp_host host;
+ struct cdns_mhdp_sink sink;
+ struct cdns_mhdp_display_fmt display_fmt;
+ u8 stream_id;
+
+ bool link_up;
+ bool plugged;
+
+ /*
+ * "start_lock" protects the access to bridge_attached and
+ * hw_state data members that control the delayed firmware
+ * loading and attaching the bridge. They are accessed from
+ * both the DRM core and cdns_mhdp_fw_cb(). In most cases just
+ * protecting the data members is enough, but the irq mask
+ * setting needs to be protected when enabling the FW.
+ */
+ spinlock_t start_lock;
+ bool bridge_attached;
+ bool bridge_enabled;
+ enum mhdp_hw_state hw_state;
+ wait_queue_head_t fw_load_wq;
+
+ /* Work struct to schedule a uevent on link train failure */
+ struct work_struct modeset_retry_work;
+ struct work_struct hpd_work;
+
+ wait_queue_head_t sw_events_wq;
+ u32 sw_events;
+
+ struct cdns_mhdp_hdcp hdcp;
+ bool hdcp_supported;
+};
+
+#define connector_to_mhdp(x) container_of(x, struct cdns_mhdp_device, connector)
+#define bridge_to_mhdp(x) container_of(x, struct cdns_mhdp_device, bridge)
+
+u32 cdns_mhdp_wait_for_sw_event(struct cdns_mhdp_device *mhdp, uint32_t event);
+
+#endif
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c
new file mode 100644
index 000000000..5e3b8edcf
--- /dev/null
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c
@@ -0,0 +1,571 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Cadence MHDP8546 DP bridge driver.
+ *
+ * Copyright (C) 2020 Cadence Design Systems, Inc.
+ *
+ */
+
+#include <linux/io.h>
+#include <linux/iopoll.h>
+
+#include <asm/unaligned.h>
+
+#include <drm/display/drm_hdcp_helper.h>
+
+#include "cdns-mhdp8546-hdcp.h"
+
+static int cdns_mhdp_secure_mailbox_read(struct cdns_mhdp_device *mhdp)
+{
+ int ret, empty;
+
+ WARN_ON(!mutex_is_locked(&mhdp->mbox_mutex));
+
+ ret = readx_poll_timeout(readl, mhdp->sapb_regs + CDNS_MAILBOX_EMPTY,
+ empty, !empty, MAILBOX_RETRY_US,
+ MAILBOX_TIMEOUT_US);
+ if (ret < 0)
+ return ret;
+
+ return readl(mhdp->sapb_regs + CDNS_MAILBOX_RX_DATA) & 0xff;
+}
+
+static int cdns_mhdp_secure_mailbox_write(struct cdns_mhdp_device *mhdp,
+ u8 val)
+{
+ int ret, full;
+
+ WARN_ON(!mutex_is_locked(&mhdp->mbox_mutex));
+
+ ret = readx_poll_timeout(readl, mhdp->sapb_regs + CDNS_MAILBOX_FULL,
+ full, !full, MAILBOX_RETRY_US,
+ MAILBOX_TIMEOUT_US);
+ if (ret < 0)
+ return ret;
+
+ writel(val, mhdp->sapb_regs + CDNS_MAILBOX_TX_DATA);
+
+ return 0;
+}
+
+static int cdns_mhdp_secure_mailbox_recv_header(struct cdns_mhdp_device *mhdp,
+ u8 module_id,
+ u8 opcode,
+ u16 req_size)
+{
+ u32 mbox_size, i;
+ u8 header[4];
+ int ret;
+
+ /* read the header of the message */
+ for (i = 0; i < sizeof(header); i++) {
+ ret = cdns_mhdp_secure_mailbox_read(mhdp);
+ if (ret < 0)
+ return ret;
+
+ header[i] = ret;
+ }
+
+ mbox_size = get_unaligned_be16(header + 2);
+
+ if (opcode != header[0] || module_id != header[1] ||
+ (opcode != HDCP_TRAN_IS_REC_ID_VALID && req_size != mbox_size)) {
+ for (i = 0; i < mbox_size; i++)
+ if (cdns_mhdp_secure_mailbox_read(mhdp) < 0)
+ break;
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int cdns_mhdp_secure_mailbox_recv_data(struct cdns_mhdp_device *mhdp,
+ u8 *buff, u16 buff_size)
+{
+ int ret;
+ u32 i;
+
+ for (i = 0; i < buff_size; i++) {
+ ret = cdns_mhdp_secure_mailbox_read(mhdp);
+ if (ret < 0)
+ return ret;
+
+ buff[i] = ret;
+ }
+
+ return 0;
+}
+
+static int cdns_mhdp_secure_mailbox_send(struct cdns_mhdp_device *mhdp,
+ u8 module_id,
+ u8 opcode,
+ u16 size,
+ u8 *message)
+{
+ u8 header[4];
+ int ret;
+ u32 i;
+
+ header[0] = opcode;
+ header[1] = module_id;
+ put_unaligned_be16(size, header + 2);
+
+ for (i = 0; i < sizeof(header); i++) {
+ ret = cdns_mhdp_secure_mailbox_write(mhdp, header[i]);
+ if (ret)
+ return ret;
+ }
+
+ for (i = 0; i < size; i++) {
+ ret = cdns_mhdp_secure_mailbox_write(mhdp, message[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int cdns_mhdp_hdcp_get_status(struct cdns_mhdp_device *mhdp,
+ u16 *hdcp_port_status)
+{
+ u8 hdcp_status[HDCP_STATUS_SIZE];
+ int ret;
+
+ mutex_lock(&mhdp->mbox_mutex);
+ ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_TX,
+ HDCP_TRAN_STATUS_CHANGE, 0, NULL);
+ if (ret)
+ goto err_get_hdcp_status;
+
+ ret = cdns_mhdp_secure_mailbox_recv_header(mhdp, MB_MODULE_ID_HDCP_TX,
+ HDCP_TRAN_STATUS_CHANGE,
+ sizeof(hdcp_status));
+ if (ret)
+ goto err_get_hdcp_status;
+
+ ret = cdns_mhdp_secure_mailbox_recv_data(mhdp, hdcp_status,
+ sizeof(hdcp_status));
+ if (ret)
+ goto err_get_hdcp_status;
+
+ *hdcp_port_status = ((u16)(hdcp_status[0] << 8) | hdcp_status[1]);
+
+err_get_hdcp_status:
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ return ret;
+}
+
+static u8 cdns_mhdp_hdcp_handle_status(struct cdns_mhdp_device *mhdp,
+ u16 status)
+{
+ u8 err = GET_HDCP_PORT_STS_LAST_ERR(status);
+
+ if (err)
+ dev_dbg(mhdp->dev, "HDCP Error = %d", err);
+
+ return err;
+}
+
+static int cdns_mhdp_hdcp_rx_id_valid_response(struct cdns_mhdp_device *mhdp,
+ u8 valid)
+{
+ int ret;
+
+ mutex_lock(&mhdp->mbox_mutex);
+ ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_TX,
+ HDCP_TRAN_RESPOND_RECEIVER_ID_VALID,
+ 1, &valid);
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ return ret;
+}
+
+static int cdns_mhdp_hdcp_rx_id_valid(struct cdns_mhdp_device *mhdp,
+ u8 *recv_num, u8 *hdcp_rx_id)
+{
+ u8 rec_id_hdr[2];
+ u8 status;
+ int ret;
+
+ mutex_lock(&mhdp->mbox_mutex);
+ ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_TX,
+ HDCP_TRAN_IS_REC_ID_VALID, 0, NULL);
+ if (ret)
+ goto err_rx_id_valid;
+
+ ret = cdns_mhdp_secure_mailbox_recv_header(mhdp, MB_MODULE_ID_HDCP_TX,
+ HDCP_TRAN_IS_REC_ID_VALID,
+ sizeof(status));
+ if (ret)
+ goto err_rx_id_valid;
+
+ ret = cdns_mhdp_secure_mailbox_recv_data(mhdp, rec_id_hdr, 2);
+ if (ret)
+ goto err_rx_id_valid;
+
+ *recv_num = rec_id_hdr[0];
+
+ ret = cdns_mhdp_secure_mailbox_recv_data(mhdp, hdcp_rx_id, 5 * *recv_num);
+
+err_rx_id_valid:
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ return ret;
+}
+
+static int cdns_mhdp_hdcp_km_stored_resp(struct cdns_mhdp_device *mhdp,
+ u32 size, u8 *km)
+{
+ int ret;
+
+ mutex_lock(&mhdp->mbox_mutex);
+ ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_TX,
+ HDCP2X_TX_RESPOND_KM, size, km);
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ return ret;
+}
+
+static int cdns_mhdp_hdcp_tx_is_km_stored(struct cdns_mhdp_device *mhdp,
+ u8 *resp, u32 size)
+{
+ int ret;
+
+ mutex_lock(&mhdp->mbox_mutex);
+ ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_TX,
+ HDCP2X_TX_IS_KM_STORED, 0, NULL);
+ if (ret)
+ goto err_is_km_stored;
+
+ ret = cdns_mhdp_secure_mailbox_recv_header(mhdp, MB_MODULE_ID_HDCP_TX,
+ HDCP2X_TX_IS_KM_STORED,
+ size);
+ if (ret)
+ goto err_is_km_stored;
+
+ ret = cdns_mhdp_secure_mailbox_recv_data(mhdp, resp, size);
+err_is_km_stored:
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ return ret;
+}
+
+static int cdns_mhdp_hdcp_tx_config(struct cdns_mhdp_device *mhdp,
+ u8 hdcp_cfg)
+{
+ int ret;
+
+ mutex_lock(&mhdp->mbox_mutex);
+ ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_TX,
+ HDCP_TRAN_CONFIGURATION, 1, &hdcp_cfg);
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ return ret;
+}
+
+static int cdns_mhdp_hdcp_set_config(struct cdns_mhdp_device *mhdp,
+ u8 hdcp_config, bool enable)
+{
+ u16 hdcp_port_status;
+ u32 ret_event;
+ u8 hdcp_cfg;
+ int ret;
+
+ hdcp_cfg = hdcp_config | (enable ? 0x04 : 0) |
+ (HDCP_CONTENT_TYPE_0 << 3);
+ cdns_mhdp_hdcp_tx_config(mhdp, hdcp_cfg);
+ ret_event = cdns_mhdp_wait_for_sw_event(mhdp, CDNS_HDCP_TX_STATUS);
+ if (!ret_event)
+ return -1;
+
+ ret = cdns_mhdp_hdcp_get_status(mhdp, &hdcp_port_status);
+ if (ret || cdns_mhdp_hdcp_handle_status(mhdp, hdcp_port_status))
+ return -1;
+
+ return 0;
+}
+
+static int cdns_mhdp_hdcp_auth_check(struct cdns_mhdp_device *mhdp)
+{
+ u16 hdcp_port_status;
+ u32 ret_event;
+ int ret;
+
+ ret_event = cdns_mhdp_wait_for_sw_event(mhdp, CDNS_HDCP_TX_STATUS);
+ if (!ret_event)
+ return -1;
+
+ ret = cdns_mhdp_hdcp_get_status(mhdp, &hdcp_port_status);
+ if (ret || cdns_mhdp_hdcp_handle_status(mhdp, hdcp_port_status))
+ return -1;
+
+ if (hdcp_port_status & 1) {
+ dev_dbg(mhdp->dev, "Authentication completed successfully!\n");
+ return 0;
+ }
+
+ dev_dbg(mhdp->dev, "Authentication failed\n");
+
+ return -1;
+}
+
+static int cdns_mhdp_hdcp_check_receviers(struct cdns_mhdp_device *mhdp)
+{
+ u8 hdcp_rec_id[HDCP_MAX_RECEIVERS][HDCP_RECEIVER_ID_SIZE_BYTES];
+ u8 hdcp_num_rec;
+ u32 ret_event;
+
+ ret_event = cdns_mhdp_wait_for_sw_event(mhdp,
+ CDNS_HDCP_TX_IS_RCVR_ID_VALID);
+ if (!ret_event)
+ return -1;
+
+ hdcp_num_rec = 0;
+ memset(&hdcp_rec_id, 0, sizeof(hdcp_rec_id));
+ cdns_mhdp_hdcp_rx_id_valid(mhdp, &hdcp_num_rec, (u8 *)hdcp_rec_id);
+ cdns_mhdp_hdcp_rx_id_valid_response(mhdp, 1);
+
+ return 0;
+}
+
+static int cdns_mhdp_hdcp_auth_22(struct cdns_mhdp_device *mhdp)
+{
+ u8 resp[HDCP_STATUS_SIZE];
+ u16 hdcp_port_status;
+ u32 ret_event;
+ int ret;
+
+ dev_dbg(mhdp->dev, "HDCP: Start 2.2 Authentication\n");
+ ret_event = cdns_mhdp_wait_for_sw_event(mhdp,
+ CDNS_HDCP2_TX_IS_KM_STORED);
+ if (!ret_event)
+ return -1;
+
+ if (ret_event & CDNS_HDCP_TX_STATUS) {
+ mhdp->sw_events &= ~CDNS_HDCP_TX_STATUS;
+ ret = cdns_mhdp_hdcp_get_status(mhdp, &hdcp_port_status);
+ if (ret || cdns_mhdp_hdcp_handle_status(mhdp, hdcp_port_status))
+ return -1;
+ }
+
+ cdns_mhdp_hdcp_tx_is_km_stored(mhdp, resp, sizeof(resp));
+ cdns_mhdp_hdcp_km_stored_resp(mhdp, 0, NULL);
+
+ if (cdns_mhdp_hdcp_check_receviers(mhdp))
+ return -1;
+
+ return 0;
+}
+
+static inline int cdns_mhdp_hdcp_auth_14(struct cdns_mhdp_device *mhdp)
+{
+ dev_dbg(mhdp->dev, "HDCP: Starting 1.4 Authentication\n");
+ return cdns_mhdp_hdcp_check_receviers(mhdp);
+}
+
+static int cdns_mhdp_hdcp_auth(struct cdns_mhdp_device *mhdp,
+ u8 hdcp_config)
+{
+ int ret;
+
+ ret = cdns_mhdp_hdcp_set_config(mhdp, hdcp_config, true);
+ if (ret)
+ goto auth_failed;
+
+ if (hdcp_config == HDCP_TX_1)
+ ret = cdns_mhdp_hdcp_auth_14(mhdp);
+ else
+ ret = cdns_mhdp_hdcp_auth_22(mhdp);
+
+ if (ret)
+ goto auth_failed;
+
+ ret = cdns_mhdp_hdcp_auth_check(mhdp);
+ if (ret)
+ ret = cdns_mhdp_hdcp_auth_check(mhdp);
+
+auth_failed:
+ return ret;
+}
+
+static int _cdns_mhdp_hdcp_disable(struct cdns_mhdp_device *mhdp)
+{
+ int ret;
+
+ dev_dbg(mhdp->dev, "[%s:%d] HDCP is being disabled...\n",
+ mhdp->connector.name, mhdp->connector.base.id);
+
+ ret = cdns_mhdp_hdcp_set_config(mhdp, 0, false);
+
+ return ret;
+}
+
+static int _cdns_mhdp_hdcp_enable(struct cdns_mhdp_device *mhdp, u8 content_type)
+{
+ int ret = -EINVAL;
+ int tries = 3;
+ u32 i;
+
+ for (i = 0; i < tries; i++) {
+ if (content_type == DRM_MODE_HDCP_CONTENT_TYPE0 ||
+ content_type == DRM_MODE_HDCP_CONTENT_TYPE1) {
+ ret = cdns_mhdp_hdcp_auth(mhdp, HDCP_TX_2);
+ if (!ret)
+ return 0;
+ _cdns_mhdp_hdcp_disable(mhdp);
+ }
+
+ if (content_type == DRM_MODE_HDCP_CONTENT_TYPE0) {
+ ret = cdns_mhdp_hdcp_auth(mhdp, HDCP_TX_1);
+ if (!ret)
+ return 0;
+ _cdns_mhdp_hdcp_disable(mhdp);
+ }
+ }
+
+ dev_err(mhdp->dev, "HDCP authentication failed (%d tries/%d)\n",
+ tries, ret);
+
+ return ret;
+}
+
+static int cdns_mhdp_hdcp_check_link(struct cdns_mhdp_device *mhdp)
+{
+ u16 hdcp_port_status;
+ int ret = 0;
+
+ mutex_lock(&mhdp->hdcp.mutex);
+ if (mhdp->hdcp.value == DRM_MODE_CONTENT_PROTECTION_UNDESIRED)
+ goto out;
+
+ ret = cdns_mhdp_hdcp_get_status(mhdp, &hdcp_port_status);
+ if (!ret && hdcp_port_status & HDCP_PORT_STS_AUTH)
+ goto out;
+
+ dev_err(mhdp->dev,
+ "[%s:%d] HDCP link failed, retrying authentication\n",
+ mhdp->connector.name, mhdp->connector.base.id);
+
+ ret = _cdns_mhdp_hdcp_disable(mhdp);
+ if (ret) {
+ mhdp->hdcp.value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
+ schedule_work(&mhdp->hdcp.prop_work);
+ goto out;
+ }
+
+ ret = _cdns_mhdp_hdcp_enable(mhdp, mhdp->hdcp.hdcp_content_type);
+ if (ret) {
+ mhdp->hdcp.value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
+ schedule_work(&mhdp->hdcp.prop_work);
+ }
+out:
+ mutex_unlock(&mhdp->hdcp.mutex);
+ return ret;
+}
+
+static void cdns_mhdp_hdcp_check_work(struct work_struct *work)
+{
+ struct delayed_work *d_work = to_delayed_work(work);
+ struct cdns_mhdp_hdcp *hdcp = container_of(d_work,
+ struct cdns_mhdp_hdcp,
+ check_work);
+ struct cdns_mhdp_device *mhdp = container_of(hdcp,
+ struct cdns_mhdp_device,
+ hdcp);
+
+ if (!cdns_mhdp_hdcp_check_link(mhdp))
+ schedule_delayed_work(&hdcp->check_work,
+ DRM_HDCP_CHECK_PERIOD_MS);
+}
+
+static void cdns_mhdp_hdcp_prop_work(struct work_struct *work)
+{
+ struct cdns_mhdp_hdcp *hdcp = container_of(work,
+ struct cdns_mhdp_hdcp,
+ prop_work);
+ struct cdns_mhdp_device *mhdp = container_of(hdcp,
+ struct cdns_mhdp_device,
+ hdcp);
+ struct drm_device *dev = mhdp->connector.dev;
+ struct drm_connector_state *state;
+
+ drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
+ mutex_lock(&mhdp->hdcp.mutex);
+ if (mhdp->hdcp.value != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
+ state = mhdp->connector.state;
+ state->content_protection = mhdp->hdcp.value;
+ }
+ mutex_unlock(&mhdp->hdcp.mutex);
+ drm_modeset_unlock(&dev->mode_config.connection_mutex);
+}
+
+int cdns_mhdp_hdcp_set_lc(struct cdns_mhdp_device *mhdp, u8 *val)
+{
+ int ret;
+
+ mutex_lock(&mhdp->mbox_mutex);
+ ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_GENERAL,
+ HDCP_GENERAL_SET_LC_128,
+ 16, val);
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ return ret;
+}
+
+int
+cdns_mhdp_hdcp_set_public_key_param(struct cdns_mhdp_device *mhdp,
+ struct cdns_hdcp_tx_public_key_param *val)
+{
+ int ret;
+
+ mutex_lock(&mhdp->mbox_mutex);
+ ret = cdns_mhdp_secure_mailbox_send(mhdp, MB_MODULE_ID_HDCP_TX,
+ HDCP2X_TX_SET_PUBLIC_KEY_PARAMS,
+ sizeof(*val), (u8 *)val);
+ mutex_unlock(&mhdp->mbox_mutex);
+
+ return ret;
+}
+
+int cdns_mhdp_hdcp_enable(struct cdns_mhdp_device *mhdp, u8 content_type)
+{
+ int ret;
+
+ mutex_lock(&mhdp->hdcp.mutex);
+ ret = _cdns_mhdp_hdcp_enable(mhdp, content_type);
+ if (ret)
+ goto out;
+
+ mhdp->hdcp.hdcp_content_type = content_type;
+ mhdp->hdcp.value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
+ schedule_work(&mhdp->hdcp.prop_work);
+ schedule_delayed_work(&mhdp->hdcp.check_work,
+ DRM_HDCP_CHECK_PERIOD_MS);
+out:
+ mutex_unlock(&mhdp->hdcp.mutex);
+ return ret;
+}
+
+int cdns_mhdp_hdcp_disable(struct cdns_mhdp_device *mhdp)
+{
+ int ret = 0;
+
+ mutex_lock(&mhdp->hdcp.mutex);
+ if (mhdp->hdcp.value != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
+ mhdp->hdcp.value = DRM_MODE_CONTENT_PROTECTION_UNDESIRED;
+ schedule_work(&mhdp->hdcp.prop_work);
+ ret = _cdns_mhdp_hdcp_disable(mhdp);
+ }
+ mutex_unlock(&mhdp->hdcp.mutex);
+ cancel_delayed_work_sync(&mhdp->hdcp.check_work);
+
+ return ret;
+}
+
+void cdns_mhdp_hdcp_init(struct cdns_mhdp_device *mhdp)
+{
+ INIT_DELAYED_WORK(&mhdp->hdcp.check_work, cdns_mhdp_hdcp_check_work);
+ INIT_WORK(&mhdp->hdcp.prop_work, cdns_mhdp_hdcp_prop_work);
+ mutex_init(&mhdp->hdcp.mutex);
+}
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.h b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.h
new file mode 100644
index 000000000..334c0b8b0
--- /dev/null
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.h
@@ -0,0 +1,92 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Cadence MHDP8546 DP bridge driver.
+ *
+ * Copyright (C) 2020 Cadence Design Systems, Inc.
+ *
+ */
+
+#ifndef CDNS_MHDP8546_HDCP_H
+#define CDNS_MHDP8546_HDCP_H
+
+#include "cdns-mhdp8546-core.h"
+
+#define HDCP_MAX_RECEIVERS 32
+#define HDCP_RECEIVER_ID_SIZE_BYTES 5
+#define HDCP_STATUS_SIZE 0x5
+#define HDCP_PORT_STS_AUTH 0x1
+#define HDCP_PORT_STS_LAST_ERR_SHIFT 0x5
+#define HDCP_PORT_STS_LAST_ERR_MASK (0x0F << 5)
+#define GET_HDCP_PORT_STS_LAST_ERR(__sts__) \
+ (((__sts__) & HDCP_PORT_STS_LAST_ERR_MASK) >> \
+ HDCP_PORT_STS_LAST_ERR_SHIFT)
+
+#define HDCP_CONFIG_1_4 BIT(0) /* use HDCP 1.4 only */
+#define HDCP_CONFIG_2_2 BIT(1) /* use HDCP 2.2 only */
+/* use All HDCP versions */
+#define HDCP_CONFIG_ALL (BIT(0) | BIT(1))
+#define HDCP_CONFIG_NONE 0
+
+enum {
+ HDCP_GENERAL_SET_LC_128,
+ HDCP_SET_SEED,
+};
+
+enum {
+ HDCP_TRAN_CONFIGURATION,
+ HDCP2X_TX_SET_PUBLIC_KEY_PARAMS,
+ HDCP2X_TX_SET_DEBUG_RANDOM_NUMBERS,
+ HDCP2X_TX_RESPOND_KM,
+ HDCP1_TX_SEND_KEYS,
+ HDCP1_TX_SEND_RANDOM_AN,
+ HDCP_TRAN_STATUS_CHANGE,
+ HDCP2X_TX_IS_KM_STORED,
+ HDCP2X_TX_STORE_KM,
+ HDCP_TRAN_IS_REC_ID_VALID,
+ HDCP_TRAN_RESPOND_RECEIVER_ID_VALID,
+ HDCP_TRAN_TEST_KEYS,
+ HDCP2X_TX_SET_KM_KEY_PARAMS,
+ HDCP_NUM_OF_SUPPORTED_MESSAGES
+};
+
+enum {
+ HDCP_CONTENT_TYPE_0,
+ HDCP_CONTENT_TYPE_1,
+};
+
+#define DRM_HDCP_CHECK_PERIOD_MS (128 * 16)
+
+#define HDCP_PAIRING_R_ID 5
+#define HDCP_PAIRING_M_LEN 16
+#define HDCP_KM_LEN 16
+#define HDCP_PAIRING_M_EKH 16
+
+struct cdns_hdcp_pairing_data {
+ u8 receiver_id[HDCP_PAIRING_R_ID];
+ u8 m[HDCP_PAIRING_M_LEN];
+ u8 km[HDCP_KM_LEN];
+ u8 ekh[HDCP_PAIRING_M_EKH];
+};
+
+enum {
+ HDCP_TX_2,
+ HDCP_TX_1,
+ HDCP_TX_BOTH,
+};
+
+#define DLP_MODULUS_N 384
+#define DLP_E 3
+
+struct cdns_hdcp_tx_public_key_param {
+ u8 N[DLP_MODULUS_N];
+ u8 E[DLP_E];
+};
+
+int cdns_mhdp_hdcp_set_public_key_param(struct cdns_mhdp_device *mhdp,
+ struct cdns_hdcp_tx_public_key_param *val);
+int cdns_mhdp_hdcp_set_lc(struct cdns_mhdp_device *mhdp, u8 *val);
+int cdns_mhdp_hdcp_enable(struct cdns_mhdp_device *mhdp, u8 content_type);
+int cdns_mhdp_hdcp_disable(struct cdns_mhdp_device *mhdp);
+void cdns_mhdp_hdcp_init(struct cdns_mhdp_device *mhdp);
+
+#endif
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
new file mode 100644
index 000000000..dfe1b5951
--- /dev/null
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * TI j721e Cadence MHDP8546 DP wrapper
+ *
+ * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
+ * Author: Jyri Sarha <jsarha@ti.com>
+ */
+
+#include <linux/io.h>
+#include <linux/platform_device.h>
+
+#include "cdns-mhdp8546-j721e.h"
+
+#define REVISION 0x00
+#define DPTX_IPCFG 0x04
+#define ECC_MEM_CFG 0x08
+#define DPTX_DSC_CFG 0x0c
+#define DPTX_SRC_CFG 0x10
+#define DPTX_VIF_SECURE_MODE_CFG 0x14
+#define DPTX_VIF_CONN_STATUS 0x18
+#define PHY_CLK_STATUS 0x1c
+
+#define DPTX_SRC_AIF_EN BIT(16)
+#define DPTX_SRC_VIF_3_IN30B BIT(11)
+#define DPTX_SRC_VIF_2_IN30B BIT(10)
+#define DPTX_SRC_VIF_1_IN30B BIT(9)
+#define DPTX_SRC_VIF_0_IN30B BIT(8)
+#define DPTX_SRC_VIF_3_SEL_DPI5 BIT(7)
+#define DPTX_SRC_VIF_3_SEL_DPI3 0
+#define DPTX_SRC_VIF_2_SEL_DPI4 BIT(6)
+#define DPTX_SRC_VIF_2_SEL_DPI2 0
+#define DPTX_SRC_VIF_1_SEL_DPI3 BIT(5)
+#define DPTX_SRC_VIF_1_SEL_DPI1 0
+#define DPTX_SRC_VIF_0_SEL_DPI2 BIT(4)
+#define DPTX_SRC_VIF_0_SEL_DPI0 0
+#define DPTX_SRC_VIF_3_EN BIT(3)
+#define DPTX_SRC_VIF_2_EN BIT(2)
+#define DPTX_SRC_VIF_1_EN BIT(1)
+#define DPTX_SRC_VIF_0_EN BIT(0)
+
+/* TODO turn DPTX_IPCFG fw_mem_clk_en at pm_runtime_suspend. */
+
+static int cdns_mhdp_j721e_init(struct cdns_mhdp_device *mhdp)
+{
+ struct platform_device *pdev = to_platform_device(mhdp->dev);
+
+ mhdp->j721e_regs = devm_platform_ioremap_resource(pdev, 1);
+ return PTR_ERR_OR_ZERO(mhdp->j721e_regs);
+}
+
+static void cdns_mhdp_j721e_enable(struct cdns_mhdp_device *mhdp)
+{
+ /*
+ * Enable VIF_0 and select DPI2 as its input. DSS0 DPI0 is connected
+ * to eDP DPI2. This is the only supported SST configuration on
+ * J721E.
+ */
+ writel(DPTX_SRC_VIF_0_EN | DPTX_SRC_VIF_0_SEL_DPI2,
+ mhdp->j721e_regs + DPTX_SRC_CFG);
+}
+
+static void cdns_mhdp_j721e_disable(struct cdns_mhdp_device *mhdp)
+{
+ /* Put everything to defaults */
+ writel(0, mhdp->j721e_regs + DPTX_DSC_CFG);
+}
+
+const struct mhdp_platform_ops mhdp_ti_j721e_ops = {
+ .init = cdns_mhdp_j721e_init,
+ .enable = cdns_mhdp_j721e_enable,
+ .disable = cdns_mhdp_j721e_disable,
+};
+
+const struct drm_bridge_timings mhdp_ti_j721e_bridge_timings = {
+ .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE |
+ DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE |
+ DRM_BUS_FLAG_DE_HIGH,
+};
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
new file mode 100644
index 000000000..97d20d115
--- /dev/null
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * TI j721e Cadence MHDP8546 DP wrapper
+ *
+ * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
+ * Author: Jyri Sarha <jsarha@ti.com>
+ */
+
+#ifndef CDNS_MHDP8546_J721E_H
+#define CDNS_MHDP8546_J721E_H
+
+#include "cdns-mhdp8546-core.h"
+
+struct mhdp_platform_ops;
+
+extern const struct mhdp_platform_ops mhdp_ti_j721e_ops;
+extern const struct drm_bridge_timings mhdp_ti_j721e_bridge_timings;
+
+#endif /* !CDNS_MHDP8546_J721E_H */
diff --git a/drivers/gpu/drm/bridge/cdns-dsi.c b/drivers/gpu/drm/bridge/cdns-dsi.c
new file mode 100644
index 000000000..20bece84f
--- /dev/null
+++ b/drivers/gpu/drm/bridge/cdns-dsi.c
@@ -0,0 +1,1330 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright: 2017 Cadence Design Systems, Inc.
+ *
+ * Author: Boris Brezillon <boris.brezillon@bootlin.com>
+ */
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_probe_helper.h>
+#include <video/mipi_display.h>
+
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#include <linux/phy/phy.h>
+#include <linux/phy/phy-mipi-dphy.h>
+
+#define IP_CONF 0x0
+#define SP_HS_FIFO_DEPTH(x) (((x) & GENMASK(30, 26)) >> 26)
+#define SP_LP_FIFO_DEPTH(x) (((x) & GENMASK(25, 21)) >> 21)
+#define VRS_FIFO_DEPTH(x) (((x) & GENMASK(20, 16)) >> 16)
+#define DIRCMD_FIFO_DEPTH(x) (((x) & GENMASK(15, 13)) >> 13)
+#define SDI_IFACE_32 BIT(12)
+#define INTERNAL_DATAPATH_32 (0 << 10)
+#define INTERNAL_DATAPATH_16 (1 << 10)
+#define INTERNAL_DATAPATH_8 (3 << 10)
+#define INTERNAL_DATAPATH_SIZE ((x) & GENMASK(11, 10))
+#define NUM_IFACE(x) ((((x) & GENMASK(9, 8)) >> 8) + 1)
+#define MAX_LANE_NB(x) (((x) & GENMASK(7, 6)) >> 6)
+#define RX_FIFO_DEPTH(x) ((x) & GENMASK(5, 0))
+
+#define MCTL_MAIN_DATA_CTL 0x4
+#define TE_MIPI_POLLING_EN BIT(25)
+#define TE_HW_POLLING_EN BIT(24)
+#define DISP_EOT_GEN BIT(18)
+#define HOST_EOT_GEN BIT(17)
+#define DISP_GEN_CHECKSUM BIT(16)
+#define DISP_GEN_ECC BIT(15)
+#define BTA_EN BIT(14)
+#define READ_EN BIT(13)
+#define REG_TE_EN BIT(12)
+#define IF_TE_EN(x) BIT(8 + (x))
+#define TVG_SEL BIT(6)
+#define VID_EN BIT(5)
+#define IF_VID_SELECT(x) ((x) << 2)
+#define IF_VID_SELECT_MASK GENMASK(3, 2)
+#define IF_VID_MODE BIT(1)
+#define LINK_EN BIT(0)
+
+#define MCTL_MAIN_PHY_CTL 0x8
+#define HS_INVERT_DAT(x) BIT(19 + ((x) * 2))
+#define SWAP_PINS_DAT(x) BIT(18 + ((x) * 2))
+#define HS_INVERT_CLK BIT(17)
+#define SWAP_PINS_CLK BIT(16)
+#define HS_SKEWCAL_EN BIT(15)
+#define WAIT_BURST_TIME(x) ((x) << 10)
+#define DATA_ULPM_EN(x) BIT(6 + (x))
+#define CLK_ULPM_EN BIT(5)
+#define CLK_CONTINUOUS BIT(4)
+#define DATA_LANE_EN(x) BIT((x) - 1)
+
+#define MCTL_MAIN_EN 0xc
+#define DATA_FORCE_STOP BIT(17)
+#define CLK_FORCE_STOP BIT(16)
+#define IF_EN(x) BIT(13 + (x))
+#define DATA_LANE_ULPM_REQ(l) BIT(9 + (l))
+#define CLK_LANE_ULPM_REQ BIT(8)
+#define DATA_LANE_START(x) BIT(4 + (x))
+#define CLK_LANE_EN BIT(3)
+#define PLL_START BIT(0)
+
+#define MCTL_DPHY_CFG0 0x10
+#define DPHY_C_RSTB BIT(20)
+#define DPHY_D_RSTB(x) GENMASK(15 + (x), 16)
+#define DPHY_PLL_PDN BIT(10)
+#define DPHY_CMN_PDN BIT(9)
+#define DPHY_C_PDN BIT(8)
+#define DPHY_D_PDN(x) GENMASK(3 + (x), 4)
+#define DPHY_ALL_D_PDN GENMASK(7, 4)
+#define DPHY_PLL_PSO BIT(1)
+#define DPHY_CMN_PSO BIT(0)
+
+#define MCTL_DPHY_TIMEOUT1 0x14
+#define HSTX_TIMEOUT(x) ((x) << 4)
+#define HSTX_TIMEOUT_MAX GENMASK(17, 0)
+#define CLK_DIV(x) (x)
+#define CLK_DIV_MAX GENMASK(3, 0)
+
+#define MCTL_DPHY_TIMEOUT2 0x18
+#define LPRX_TIMEOUT(x) (x)
+
+#define MCTL_ULPOUT_TIME 0x1c
+#define DATA_LANE_ULPOUT_TIME(x) ((x) << 9)
+#define CLK_LANE_ULPOUT_TIME(x) (x)
+
+#define MCTL_3DVIDEO_CTL 0x20
+#define VID_VSYNC_3D_EN BIT(7)
+#define VID_VSYNC_3D_LR BIT(5)
+#define VID_VSYNC_3D_SECOND_EN BIT(4)
+#define VID_VSYNC_3DFORMAT_LINE (0 << 2)
+#define VID_VSYNC_3DFORMAT_FRAME (1 << 2)
+#define VID_VSYNC_3DFORMAT_PIXEL (2 << 2)
+#define VID_VSYNC_3DMODE_OFF 0
+#define VID_VSYNC_3DMODE_PORTRAIT 1
+#define VID_VSYNC_3DMODE_LANDSCAPE 2
+
+#define MCTL_MAIN_STS 0x24
+#define MCTL_MAIN_STS_CTL 0x130
+#define MCTL_MAIN_STS_CLR 0x150
+#define MCTL_MAIN_STS_FLAG 0x170
+#define HS_SKEWCAL_DONE BIT(11)
+#define IF_UNTERM_PKT_ERR(x) BIT(8 + (x))
+#define LPRX_TIMEOUT_ERR BIT(7)
+#define HSTX_TIMEOUT_ERR BIT(6)
+#define DATA_LANE_RDY(l) BIT(2 + (l))
+#define CLK_LANE_RDY BIT(1)
+#define PLL_LOCKED BIT(0)
+
+#define MCTL_DPHY_ERR 0x28
+#define MCTL_DPHY_ERR_CTL1 0x148
+#define MCTL_DPHY_ERR_CLR 0x168
+#define MCTL_DPHY_ERR_FLAG 0x188
+#define ERR_CONT_LP(x, l) BIT(18 + ((x) * 4) + (l))
+#define ERR_CONTROL(l) BIT(14 + (l))
+#define ERR_SYNESC(l) BIT(10 + (l))
+#define ERR_ESC(l) BIT(6 + (l))
+
+#define MCTL_DPHY_ERR_CTL2 0x14c
+#define ERR_CONT_LP_EDGE(x, l) BIT(12 + ((x) * 4) + (l))
+#define ERR_CONTROL_EDGE(l) BIT(8 + (l))
+#define ERR_SYN_ESC_EDGE(l) BIT(4 + (l))
+#define ERR_ESC_EDGE(l) BIT(0 + (l))
+
+#define MCTL_LANE_STS 0x2c
+#define PPI_C_TX_READY_HS BIT(18)
+#define DPHY_PLL_LOCK BIT(17)
+#define PPI_D_RX_ULPS_ESC(x) (((x) & GENMASK(15, 12)) >> 12)
+#define LANE_STATE_START 0
+#define LANE_STATE_IDLE 1
+#define LANE_STATE_WRITE 2
+#define LANE_STATE_ULPM 3
+#define LANE_STATE_READ 4
+#define DATA_LANE_STATE(l, val) \
+ (((val) >> (2 + 2 * (l) + ((l) ? 1 : 0))) & GENMASK((l) ? 1 : 2, 0))
+#define CLK_LANE_STATE_HS 2
+#define CLK_LANE_STATE(val) ((val) & GENMASK(1, 0))
+
+#define DSC_MODE_CTL 0x30
+#define DSC_MODE_EN BIT(0)
+
+#define DSC_CMD_SEND 0x34
+#define DSC_SEND_PPS BIT(0)
+#define DSC_EXECUTE_QUEUE BIT(1)
+
+#define DSC_PPS_WRDAT 0x38
+
+#define DSC_MODE_STS 0x3c
+#define DSC_PPS_DONE BIT(1)
+#define DSC_EXEC_DONE BIT(2)
+
+#define CMD_MODE_CTL 0x70
+#define IF_LP_EN(x) BIT(9 + (x))
+#define IF_VCHAN_ID(x, c) ((c) << ((x) * 2))
+
+#define CMD_MODE_CTL2 0x74
+#define TE_TIMEOUT(x) ((x) << 11)
+#define FILL_VALUE(x) ((x) << 3)
+#define ARB_IF_WITH_HIGHEST_PRIORITY(x) ((x) << 1)
+#define ARB_ROUND_ROBIN_MODE BIT(0)
+
+#define CMD_MODE_STS 0x78
+#define CMD_MODE_STS_CTL 0x134
+#define CMD_MODE_STS_CLR 0x154
+#define CMD_MODE_STS_FLAG 0x174
+#define ERR_IF_UNDERRUN(x) BIT(4 + (x))
+#define ERR_UNWANTED_READ BIT(3)
+#define ERR_TE_MISS BIT(2)
+#define ERR_NO_TE BIT(1)
+#define CSM_RUNNING BIT(0)
+
+#define DIRECT_CMD_SEND 0x80
+
+#define DIRECT_CMD_MAIN_SETTINGS 0x84
+#define TRIGGER_VAL(x) ((x) << 25)
+#define CMD_LP_EN BIT(24)
+#define CMD_SIZE(x) ((x) << 16)
+#define CMD_VCHAN_ID(x) ((x) << 14)
+#define CMD_DATATYPE(x) ((x) << 8)
+#define CMD_LONG BIT(3)
+#define WRITE_CMD 0
+#define READ_CMD 1
+#define TE_REQ 4
+#define TRIGGER_REQ 5
+#define BTA_REQ 6
+
+#define DIRECT_CMD_STS 0x88
+#define DIRECT_CMD_STS_CTL 0x138
+#define DIRECT_CMD_STS_CLR 0x158
+#define DIRECT_CMD_STS_FLAG 0x178
+#define RCVD_ACK_VAL(val) ((val) >> 16)
+#define RCVD_TRIGGER_VAL(val) (((val) & GENMASK(14, 11)) >> 11)
+#define READ_COMPLETED_WITH_ERR BIT(10)
+#define BTA_FINISHED BIT(9)
+#define BTA_COMPLETED BIT(8)
+#define TE_RCVD BIT(7)
+#define TRIGGER_RCVD BIT(6)
+#define ACK_WITH_ERR_RCVD BIT(5)
+#define ACK_RCVD BIT(4)
+#define READ_COMPLETED BIT(3)
+#define TRIGGER_COMPLETED BIT(2)
+#define WRITE_COMPLETED BIT(1)
+#define SENDING_CMD BIT(0)
+
+#define DIRECT_CMD_STOP_READ 0x8c
+
+#define DIRECT_CMD_WRDATA 0x90
+
+#define DIRECT_CMD_FIFO_RST 0x94
+
+#define DIRECT_CMD_RDDATA 0xa0
+
+#define DIRECT_CMD_RD_PROPS 0xa4
+#define RD_DCS BIT(18)
+#define RD_VCHAN_ID(val) (((val) >> 16) & GENMASK(1, 0))
+#define RD_SIZE(val) ((val) & GENMASK(15, 0))
+
+#define DIRECT_CMD_RD_STS 0xa8
+#define DIRECT_CMD_RD_STS_CTL 0x13c
+#define DIRECT_CMD_RD_STS_CLR 0x15c
+#define DIRECT_CMD_RD_STS_FLAG 0x17c
+#define ERR_EOT_WITH_ERR BIT(8)
+#define ERR_MISSING_EOT BIT(7)
+#define ERR_WRONG_LENGTH BIT(6)
+#define ERR_OVERSIZE BIT(5)
+#define ERR_RECEIVE BIT(4)
+#define ERR_UNDECODABLE BIT(3)
+#define ERR_CHECKSUM BIT(2)
+#define ERR_UNCORRECTABLE BIT(1)
+#define ERR_FIXED BIT(0)
+
+#define VID_MAIN_CTL 0xb0
+#define VID_IGNORE_MISS_VSYNC BIT(31)
+#define VID_FIELD_SW BIT(28)
+#define VID_INTERLACED_EN BIT(27)
+#define RECOVERY_MODE(x) ((x) << 25)
+#define RECOVERY_MODE_NEXT_HSYNC 0
+#define RECOVERY_MODE_NEXT_STOP_POINT 2
+#define RECOVERY_MODE_NEXT_VSYNC 3
+#define REG_BLKEOL_MODE(x) ((x) << 23)
+#define REG_BLKLINE_MODE(x) ((x) << 21)
+#define REG_BLK_MODE_NULL_PKT 0
+#define REG_BLK_MODE_BLANKING_PKT 1
+#define REG_BLK_MODE_LP 2
+#define SYNC_PULSE_HORIZONTAL BIT(20)
+#define SYNC_PULSE_ACTIVE BIT(19)
+#define BURST_MODE BIT(18)
+#define VID_PIXEL_MODE_MASK GENMASK(17, 14)
+#define VID_PIXEL_MODE_RGB565 (0 << 14)
+#define VID_PIXEL_MODE_RGB666_PACKED (1 << 14)
+#define VID_PIXEL_MODE_RGB666 (2 << 14)
+#define VID_PIXEL_MODE_RGB888 (3 << 14)
+#define VID_PIXEL_MODE_RGB101010 (4 << 14)
+#define VID_PIXEL_MODE_RGB121212 (5 << 14)
+#define VID_PIXEL_MODE_YUV420 (8 << 14)
+#define VID_PIXEL_MODE_YUV422_PACKED (9 << 14)
+#define VID_PIXEL_MODE_YUV422 (10 << 14)
+#define VID_PIXEL_MODE_YUV422_24B (11 << 14)
+#define VID_PIXEL_MODE_DSC_COMP (12 << 14)
+#define VID_DATATYPE(x) ((x) << 8)
+#define VID_VIRTCHAN_ID(iface, x) ((x) << (4 + (iface) * 2))
+#define STOP_MODE(x) ((x) << 2)
+#define START_MODE(x) (x)
+
+#define VID_VSIZE1 0xb4
+#define VFP_LEN(x) ((x) << 12)
+#define VBP_LEN(x) ((x) << 6)
+#define VSA_LEN(x) (x)
+
+#define VID_VSIZE2 0xb8
+#define VACT_LEN(x) (x)
+
+#define VID_HSIZE1 0xc0
+#define HBP_LEN(x) ((x) << 16)
+#define HSA_LEN(x) (x)
+
+#define VID_HSIZE2 0xc4
+#define HFP_LEN(x) ((x) << 16)
+#define HACT_LEN(x) (x)
+
+#define VID_BLKSIZE1 0xcc
+#define BLK_EOL_PKT_LEN(x) ((x) << 15)
+#define BLK_LINE_EVENT_PKT_LEN(x) (x)
+
+#define VID_BLKSIZE2 0xd0
+#define BLK_LINE_PULSE_PKT_LEN(x) (x)
+
+#define VID_PKT_TIME 0xd8
+#define BLK_EOL_DURATION(x) (x)
+
+#define VID_DPHY_TIME 0xdc
+#define REG_WAKEUP_TIME(x) ((x) << 17)
+#define REG_LINE_DURATION(x) (x)
+
+#define VID_ERR_COLOR1 0xe0
+#define COL_GREEN(x) ((x) << 12)
+#define COL_RED(x) (x)
+
+#define VID_ERR_COLOR2 0xe4
+#define PAD_VAL(x) ((x) << 12)
+#define COL_BLUE(x) (x)
+
+#define VID_VPOS 0xe8
+#define LINE_VAL(val) (((val) & GENMASK(14, 2)) >> 2)
+#define LINE_POS(val) ((val) & GENMASK(1, 0))
+
+#define VID_HPOS 0xec
+#define HORIZ_VAL(val) (((val) & GENMASK(17, 3)) >> 3)
+#define HORIZ_POS(val) ((val) & GENMASK(2, 0))
+
+#define VID_MODE_STS 0xf0
+#define VID_MODE_STS_CTL 0x140
+#define VID_MODE_STS_CLR 0x160
+#define VID_MODE_STS_FLAG 0x180
+#define VSG_RECOVERY BIT(10)
+#define ERR_VRS_WRONG_LEN BIT(9)
+#define ERR_LONG_READ BIT(8)
+#define ERR_LINE_WRITE BIT(7)
+#define ERR_BURST_WRITE BIT(6)
+#define ERR_SMALL_HEIGHT BIT(5)
+#define ERR_SMALL_LEN BIT(4)
+#define ERR_MISSING_VSYNC BIT(3)
+#define ERR_MISSING_HSYNC BIT(2)
+#define ERR_MISSING_DATA BIT(1)
+#define VSG_RUNNING BIT(0)
+
+#define VID_VCA_SETTING1 0xf4
+#define BURST_LP BIT(16)
+#define MAX_BURST_LIMIT(x) (x)
+
+#define VID_VCA_SETTING2 0xf8
+#define MAX_LINE_LIMIT(x) ((x) << 16)
+#define EXACT_BURST_LIMIT(x) (x)
+
+#define TVG_CTL 0xfc
+#define TVG_STRIPE_SIZE(x) ((x) << 5)
+#define TVG_MODE_MASK GENMASK(4, 3)
+#define TVG_MODE_SINGLE_COLOR (0 << 3)
+#define TVG_MODE_VSTRIPES (2 << 3)
+#define TVG_MODE_HSTRIPES (3 << 3)
+#define TVG_STOPMODE_MASK GENMASK(2, 1)
+#define TVG_STOPMODE_EOF (0 << 1)
+#define TVG_STOPMODE_EOL (1 << 1)
+#define TVG_STOPMODE_NOW (2 << 1)
+#define TVG_RUN BIT(0)
+
+#define TVG_IMG_SIZE 0x100
+#define TVG_NBLINES(x) ((x) << 16)
+#define TVG_LINE_SIZE(x) (x)
+
+#define TVG_COLOR1 0x104
+#define TVG_COL1_GREEN(x) ((x) << 12)
+#define TVG_COL1_RED(x) (x)
+
+#define TVG_COLOR1_BIS 0x108
+#define TVG_COL1_BLUE(x) (x)
+
+#define TVG_COLOR2 0x10c
+#define TVG_COL2_GREEN(x) ((x) << 12)
+#define TVG_COL2_RED(x) (x)
+
+#define TVG_COLOR2_BIS 0x110
+#define TVG_COL2_BLUE(x) (x)
+
+#define TVG_STS 0x114
+#define TVG_STS_CTL 0x144
+#define TVG_STS_CLR 0x164
+#define TVG_STS_FLAG 0x184
+#define TVG_STS_RUNNING BIT(0)
+
+#define STS_CTL_EDGE(e) ((e) << 16)
+
+#define DPHY_LANES_MAP 0x198
+#define DAT_REMAP_CFG(b, l) ((l) << ((b) * 8))
+
+#define DPI_IRQ_EN 0x1a0
+#define DPI_IRQ_CLR 0x1a4
+#define DPI_IRQ_STS 0x1a8
+#define PIXEL_BUF_OVERFLOW BIT(0)
+
+#define DPI_CFG 0x1ac
+#define DPI_CFG_FIFO_DEPTH(x) ((x) >> 16)
+#define DPI_CFG_FIFO_LEVEL(x) ((x) & GENMASK(15, 0))
+
+#define TEST_GENERIC 0x1f0
+#define TEST_STATUS(x) ((x) >> 16)
+#define TEST_CTRL(x) (x)
+
+#define ID_REG 0x1fc
+#define REV_VENDOR_ID(x) (((x) & GENMASK(31, 20)) >> 20)
+#define REV_PRODUCT_ID(x) (((x) & GENMASK(19, 12)) >> 12)
+#define REV_HW(x) (((x) & GENMASK(11, 8)) >> 8)
+#define REV_MAJOR(x) (((x) & GENMASK(7, 4)) >> 4)
+#define REV_MINOR(x) ((x) & GENMASK(3, 0))
+
+#define DSI_OUTPUT_PORT 0
+#define DSI_INPUT_PORT(inputid) (1 + (inputid))
+
+#define DSI_HBP_FRAME_OVERHEAD 12
+#define DSI_HSA_FRAME_OVERHEAD 14
+#define DSI_HFP_FRAME_OVERHEAD 6
+#define DSI_HSS_VSS_VSE_FRAME_OVERHEAD 4
+#define DSI_BLANKING_FRAME_OVERHEAD 6
+#define DSI_NULL_FRAME_OVERHEAD 6
+#define DSI_EOT_PKT_SIZE 4
+
+struct cdns_dsi_output {
+ struct mipi_dsi_device *dev;
+ struct drm_panel *panel;
+ struct drm_bridge *bridge;
+ union phy_configure_opts phy_opts;
+};
+
+enum cdns_dsi_input_id {
+ CDNS_SDI_INPUT,
+ CDNS_DPI_INPUT,
+ CDNS_DSC_INPUT,
+};
+
+struct cdns_dsi_cfg {
+ unsigned int hfp;
+ unsigned int hsa;
+ unsigned int hbp;
+ unsigned int hact;
+ unsigned int htotal;
+};
+
+struct cdns_dsi_input {
+ enum cdns_dsi_input_id id;
+ struct drm_bridge bridge;
+};
+
+struct cdns_dsi {
+ struct mipi_dsi_host base;
+ void __iomem *regs;
+ struct cdns_dsi_input input;
+ struct cdns_dsi_output output;
+ unsigned int direct_cmd_fifo_depth;
+ unsigned int rx_fifo_depth;
+ struct completion direct_cmd_comp;
+ struct clk *dsi_p_clk;
+ struct reset_control *dsi_p_rst;
+ struct clk *dsi_sys_clk;
+ bool link_initialized;
+ bool phy_initialized;
+ struct phy *dphy;
+};
+
+static inline struct cdns_dsi *input_to_dsi(struct cdns_dsi_input *input)
+{
+ return container_of(input, struct cdns_dsi, input);
+}
+
+static inline struct cdns_dsi *to_cdns_dsi(struct mipi_dsi_host *host)
+{
+ return container_of(host, struct cdns_dsi, base);
+}
+
+static inline struct cdns_dsi_input *
+bridge_to_cdns_dsi_input(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct cdns_dsi_input, bridge);
+}
+
+static unsigned int mode_to_dpi_hfp(const struct drm_display_mode *mode,
+ bool mode_valid_check)
+{
+ if (mode_valid_check)
+ return mode->hsync_start - mode->hdisplay;
+
+ return mode->crtc_hsync_start - mode->crtc_hdisplay;
+}
+
+static unsigned int dpi_to_dsi_timing(unsigned int dpi_timing,
+ unsigned int dpi_bpp,
+ unsigned int dsi_pkt_overhead)
+{
+ unsigned int dsi_timing = DIV_ROUND_UP(dpi_timing * dpi_bpp, 8);
+
+ if (dsi_timing < dsi_pkt_overhead)
+ dsi_timing = 0;
+ else
+ dsi_timing -= dsi_pkt_overhead;
+
+ return dsi_timing;
+}
+
+static int cdns_dsi_mode2cfg(struct cdns_dsi *dsi,
+ const struct drm_display_mode *mode,
+ struct cdns_dsi_cfg *dsi_cfg,
+ bool mode_valid_check)
+{
+ struct cdns_dsi_output *output = &dsi->output;
+ unsigned int tmp;
+ bool sync_pulse = false;
+ int bpp;
+
+ memset(dsi_cfg, 0, sizeof(*dsi_cfg));
+
+ if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+ sync_pulse = true;
+
+ bpp = mipi_dsi_pixel_format_to_bpp(output->dev->format);
+
+ if (mode_valid_check)
+ tmp = mode->htotal -
+ (sync_pulse ? mode->hsync_end : mode->hsync_start);
+ else
+ tmp = mode->crtc_htotal -
+ (sync_pulse ?
+ mode->crtc_hsync_end : mode->crtc_hsync_start);
+
+ dsi_cfg->hbp = dpi_to_dsi_timing(tmp, bpp, DSI_HBP_FRAME_OVERHEAD);
+
+ if (sync_pulse) {
+ if (mode_valid_check)
+ tmp = mode->hsync_end - mode->hsync_start;
+ else
+ tmp = mode->crtc_hsync_end - mode->crtc_hsync_start;
+
+ dsi_cfg->hsa = dpi_to_dsi_timing(tmp, bpp,
+ DSI_HSA_FRAME_OVERHEAD);
+ }
+
+ dsi_cfg->hact = dpi_to_dsi_timing(mode_valid_check ?
+ mode->hdisplay : mode->crtc_hdisplay,
+ bpp, 0);
+ dsi_cfg->hfp = dpi_to_dsi_timing(mode_to_dpi_hfp(mode, mode_valid_check),
+ bpp, DSI_HFP_FRAME_OVERHEAD);
+
+ return 0;
+}
+
+static int cdns_dsi_adjust_phy_config(struct cdns_dsi *dsi,
+ struct cdns_dsi_cfg *dsi_cfg,
+ struct phy_configure_opts_mipi_dphy *phy_cfg,
+ const struct drm_display_mode *mode,
+ bool mode_valid_check)
+{
+ struct cdns_dsi_output *output = &dsi->output;
+ unsigned long long dlane_bps;
+ unsigned long adj_dsi_htotal;
+ unsigned long dsi_htotal;
+ unsigned long dpi_htotal;
+ unsigned long dpi_hz;
+ unsigned int dsi_hfp_ext;
+ unsigned int lanes = output->dev->lanes;
+
+ dsi_htotal = dsi_cfg->hbp + DSI_HBP_FRAME_OVERHEAD;
+ if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+ dsi_htotal += dsi_cfg->hsa + DSI_HSA_FRAME_OVERHEAD;
+
+ dsi_htotal += dsi_cfg->hact;
+ dsi_htotal += dsi_cfg->hfp + DSI_HFP_FRAME_OVERHEAD;
+
+ /*
+ * Make sure DSI htotal is aligned on a lane boundary when calculating
+ * the expected data rate. This is done by extending HFP in case of
+ * misalignment.
+ */
+ adj_dsi_htotal = dsi_htotal;
+ if (dsi_htotal % lanes)
+ adj_dsi_htotal += lanes - (dsi_htotal % lanes);
+
+ dpi_hz = (mode_valid_check ? mode->clock : mode->crtc_clock) * 1000;
+ dlane_bps = (unsigned long long)dpi_hz * adj_dsi_htotal;
+
+ /* data rate in bytes/sec is not an integer, refuse the mode. */
+ dpi_htotal = mode_valid_check ? mode->htotal : mode->crtc_htotal;
+ if (do_div(dlane_bps, lanes * dpi_htotal))
+ return -EINVAL;
+
+ /* data rate was in bytes/sec, convert to bits/sec. */
+ phy_cfg->hs_clk_rate = dlane_bps * 8;
+
+ dsi_hfp_ext = adj_dsi_htotal - dsi_htotal;
+ dsi_cfg->hfp += dsi_hfp_ext;
+ dsi_cfg->htotal = dsi_htotal + dsi_hfp_ext;
+
+ return 0;
+}
+
+static int cdns_dsi_check_conf(struct cdns_dsi *dsi,
+ const struct drm_display_mode *mode,
+ struct cdns_dsi_cfg *dsi_cfg,
+ bool mode_valid_check)
+{
+ struct cdns_dsi_output *output = &dsi->output;
+ struct phy_configure_opts_mipi_dphy *phy_cfg = &output->phy_opts.mipi_dphy;
+ unsigned long dsi_hss_hsa_hse_hbp;
+ unsigned int nlanes = output->dev->lanes;
+ int ret;
+
+ ret = cdns_dsi_mode2cfg(dsi, mode, dsi_cfg, mode_valid_check);
+ if (ret)
+ return ret;
+
+ phy_mipi_dphy_get_default_config(mode->crtc_clock * 1000,
+ mipi_dsi_pixel_format_to_bpp(output->dev->format),
+ nlanes, phy_cfg);
+
+ ret = cdns_dsi_adjust_phy_config(dsi, dsi_cfg, phy_cfg, mode, mode_valid_check);
+ if (ret)
+ return ret;
+
+ ret = phy_validate(dsi->dphy, PHY_MODE_MIPI_DPHY, 0, &output->phy_opts);
+ if (ret)
+ return ret;
+
+ dsi_hss_hsa_hse_hbp = dsi_cfg->hbp + DSI_HBP_FRAME_OVERHEAD;
+ if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+ dsi_hss_hsa_hse_hbp += dsi_cfg->hsa + DSI_HSA_FRAME_OVERHEAD;
+
+ /*
+ * Make sure DPI(HFP) > DSI(HSS+HSA+HSE+HBP) to guarantee that the FIFO
+ * is empty before we start a receiving a new line on the DPI
+ * interface.
+ */
+ if ((u64)phy_cfg->hs_clk_rate *
+ mode_to_dpi_hfp(mode, mode_valid_check) * nlanes <
+ (u64)dsi_hss_hsa_hse_hbp *
+ (mode_valid_check ? mode->clock : mode->crtc_clock) * 1000)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int cdns_dsi_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
+ struct cdns_dsi *dsi = input_to_dsi(input);
+ struct cdns_dsi_output *output = &dsi->output;
+
+ if (!drm_core_check_feature(bridge->dev, DRIVER_ATOMIC)) {
+ dev_err(dsi->base.dev,
+ "cdns-dsi driver is only compatible with DRM devices supporting atomic updates");
+ return -ENOTSUPP;
+ }
+
+ return drm_bridge_attach(bridge->encoder, output->bridge, bridge,
+ flags);
+}
+
+static enum drm_mode_status
+cdns_dsi_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
+ struct cdns_dsi *dsi = input_to_dsi(input);
+ struct cdns_dsi_output *output = &dsi->output;
+ struct cdns_dsi_cfg dsi_cfg;
+ int bpp, ret;
+
+ /*
+ * VFP_DSI should be less than VFP_DPI and VFP_DSI should be at
+ * least 1.
+ */
+ if (mode->vtotal - mode->vsync_end < 2)
+ return MODE_V_ILLEGAL;
+
+ /* VSA_DSI = VSA_DPI and must be at least 2. */
+ if (mode->vsync_end - mode->vsync_start < 2)
+ return MODE_V_ILLEGAL;
+
+ /* HACT must be 32-bits aligned. */
+ bpp = mipi_dsi_pixel_format_to_bpp(output->dev->format);
+ if ((mode->hdisplay * bpp) % 32)
+ return MODE_H_ILLEGAL;
+
+ ret = cdns_dsi_check_conf(dsi, mode, &dsi_cfg, true);
+ if (ret)
+ return MODE_BAD;
+
+ return MODE_OK;
+}
+
+static void cdns_dsi_bridge_disable(struct drm_bridge *bridge)
+{
+ struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
+ struct cdns_dsi *dsi = input_to_dsi(input);
+ u32 val;
+
+ val = readl(dsi->regs + MCTL_MAIN_DATA_CTL);
+ val &= ~(IF_VID_SELECT_MASK | IF_VID_MODE | VID_EN | HOST_EOT_GEN |
+ DISP_EOT_GEN);
+ writel(val, dsi->regs + MCTL_MAIN_DATA_CTL);
+
+ val = readl(dsi->regs + MCTL_MAIN_EN) & ~IF_EN(input->id);
+ writel(val, dsi->regs + MCTL_MAIN_EN);
+ pm_runtime_put(dsi->base.dev);
+}
+
+static void cdns_dsi_bridge_post_disable(struct drm_bridge *bridge)
+{
+ struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
+ struct cdns_dsi *dsi = input_to_dsi(input);
+
+ pm_runtime_put(dsi->base.dev);
+}
+
+static void cdns_dsi_hs_init(struct cdns_dsi *dsi)
+{
+ struct cdns_dsi_output *output = &dsi->output;
+ u32 status;
+
+ if (dsi->phy_initialized)
+ return;
+ /*
+ * Power all internal DPHY blocks down and maintain their reset line
+ * asserted before changing the DPHY config.
+ */
+ writel(DPHY_CMN_PSO | DPHY_PLL_PSO | DPHY_ALL_D_PDN | DPHY_C_PDN |
+ DPHY_CMN_PDN | DPHY_PLL_PDN,
+ dsi->regs + MCTL_DPHY_CFG0);
+
+ phy_init(dsi->dphy);
+ phy_set_mode(dsi->dphy, PHY_MODE_MIPI_DPHY);
+ phy_configure(dsi->dphy, &output->phy_opts);
+ phy_power_on(dsi->dphy);
+
+ /* Activate the PLL and wait until it's locked. */
+ writel(PLL_LOCKED, dsi->regs + MCTL_MAIN_STS_CLR);
+ writel(DPHY_CMN_PSO | DPHY_ALL_D_PDN | DPHY_C_PDN | DPHY_CMN_PDN,
+ dsi->regs + MCTL_DPHY_CFG0);
+ WARN_ON_ONCE(readl_poll_timeout(dsi->regs + MCTL_MAIN_STS, status,
+ status & PLL_LOCKED, 100, 100));
+ /* De-assert data and clock reset lines. */
+ writel(DPHY_CMN_PSO | DPHY_ALL_D_PDN | DPHY_C_PDN | DPHY_CMN_PDN |
+ DPHY_D_RSTB(output->dev->lanes) | DPHY_C_RSTB,
+ dsi->regs + MCTL_DPHY_CFG0);
+ dsi->phy_initialized = true;
+}
+
+static void cdns_dsi_init_link(struct cdns_dsi *dsi)
+{
+ struct cdns_dsi_output *output = &dsi->output;
+ unsigned long sysclk_period, ulpout;
+ u32 val;
+ int i;
+
+ if (dsi->link_initialized)
+ return;
+
+ val = 0;
+ for (i = 1; i < output->dev->lanes; i++)
+ val |= DATA_LANE_EN(i);
+
+ if (!(output->dev->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS))
+ val |= CLK_CONTINUOUS;
+
+ writel(val, dsi->regs + MCTL_MAIN_PHY_CTL);
+
+ /* ULPOUT should be set to 1ms and is expressed in sysclk cycles. */
+ sysclk_period = NSEC_PER_SEC / clk_get_rate(dsi->dsi_sys_clk);
+ ulpout = DIV_ROUND_UP(NSEC_PER_MSEC, sysclk_period);
+ writel(CLK_LANE_ULPOUT_TIME(ulpout) | DATA_LANE_ULPOUT_TIME(ulpout),
+ dsi->regs + MCTL_ULPOUT_TIME);
+
+ writel(LINK_EN, dsi->regs + MCTL_MAIN_DATA_CTL);
+
+ val = CLK_LANE_EN | PLL_START;
+ for (i = 0; i < output->dev->lanes; i++)
+ val |= DATA_LANE_START(i);
+
+ writel(val, dsi->regs + MCTL_MAIN_EN);
+
+ dsi->link_initialized = true;
+}
+
+static void cdns_dsi_bridge_enable(struct drm_bridge *bridge)
+{
+ struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
+ struct cdns_dsi *dsi = input_to_dsi(input);
+ struct cdns_dsi_output *output = &dsi->output;
+ struct drm_display_mode *mode;
+ struct phy_configure_opts_mipi_dphy *phy_cfg = &output->phy_opts.mipi_dphy;
+ unsigned long tx_byte_period;
+ struct cdns_dsi_cfg dsi_cfg;
+ u32 tmp, reg_wakeup, div;
+ int nlanes;
+
+ if (WARN_ON(pm_runtime_get_sync(dsi->base.dev) < 0))
+ return;
+
+ mode = &bridge->encoder->crtc->state->adjusted_mode;
+ nlanes = output->dev->lanes;
+
+ WARN_ON_ONCE(cdns_dsi_check_conf(dsi, mode, &dsi_cfg, false));
+
+ cdns_dsi_hs_init(dsi);
+ cdns_dsi_init_link(dsi);
+
+ writel(HBP_LEN(dsi_cfg.hbp) | HSA_LEN(dsi_cfg.hsa),
+ dsi->regs + VID_HSIZE1);
+ writel(HFP_LEN(dsi_cfg.hfp) | HACT_LEN(dsi_cfg.hact),
+ dsi->regs + VID_HSIZE2);
+
+ writel(VBP_LEN(mode->crtc_vtotal - mode->crtc_vsync_end - 1) |
+ VFP_LEN(mode->crtc_vsync_start - mode->crtc_vdisplay) |
+ VSA_LEN(mode->crtc_vsync_end - mode->crtc_vsync_start + 1),
+ dsi->regs + VID_VSIZE1);
+ writel(mode->crtc_vdisplay, dsi->regs + VID_VSIZE2);
+
+ tmp = dsi_cfg.htotal -
+ (dsi_cfg.hsa + DSI_BLANKING_FRAME_OVERHEAD +
+ DSI_HSA_FRAME_OVERHEAD);
+ writel(BLK_LINE_PULSE_PKT_LEN(tmp), dsi->regs + VID_BLKSIZE2);
+ if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+ writel(MAX_LINE_LIMIT(tmp - DSI_NULL_FRAME_OVERHEAD),
+ dsi->regs + VID_VCA_SETTING2);
+
+ tmp = dsi_cfg.htotal -
+ (DSI_HSS_VSS_VSE_FRAME_OVERHEAD + DSI_BLANKING_FRAME_OVERHEAD);
+ writel(BLK_LINE_EVENT_PKT_LEN(tmp), dsi->regs + VID_BLKSIZE1);
+ if (!(output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE))
+ writel(MAX_LINE_LIMIT(tmp - DSI_NULL_FRAME_OVERHEAD),
+ dsi->regs + VID_VCA_SETTING2);
+
+ tmp = DIV_ROUND_UP(dsi_cfg.htotal, nlanes) -
+ DIV_ROUND_UP(dsi_cfg.hsa, nlanes);
+
+ if (!(output->dev->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET))
+ tmp -= DIV_ROUND_UP(DSI_EOT_PKT_SIZE, nlanes);
+
+ tx_byte_period = DIV_ROUND_DOWN_ULL((u64)NSEC_PER_SEC * 8,
+ phy_cfg->hs_clk_rate);
+ reg_wakeup = (phy_cfg->hs_prepare + phy_cfg->hs_zero) / tx_byte_period;
+ writel(REG_WAKEUP_TIME(reg_wakeup) | REG_LINE_DURATION(tmp),
+ dsi->regs + VID_DPHY_TIME);
+
+ /*
+ * HSTX and LPRX timeouts are both expressed in TX byte clk cycles and
+ * both should be set to at least the time it takes to transmit a
+ * frame.
+ */
+ tmp = NSEC_PER_SEC / drm_mode_vrefresh(mode);
+ tmp /= tx_byte_period;
+
+ for (div = 0; div <= CLK_DIV_MAX; div++) {
+ if (tmp <= HSTX_TIMEOUT_MAX)
+ break;
+
+ tmp >>= 1;
+ }
+
+ if (tmp > HSTX_TIMEOUT_MAX)
+ tmp = HSTX_TIMEOUT_MAX;
+
+ writel(CLK_DIV(div) | HSTX_TIMEOUT(tmp),
+ dsi->regs + MCTL_DPHY_TIMEOUT1);
+
+ writel(LPRX_TIMEOUT(tmp), dsi->regs + MCTL_DPHY_TIMEOUT2);
+
+ if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO) {
+ switch (output->dev->format) {
+ case MIPI_DSI_FMT_RGB888:
+ tmp = VID_PIXEL_MODE_RGB888 |
+ VID_DATATYPE(MIPI_DSI_PACKED_PIXEL_STREAM_24);
+ break;
+
+ case MIPI_DSI_FMT_RGB666:
+ tmp = VID_PIXEL_MODE_RGB666 |
+ VID_DATATYPE(MIPI_DSI_PIXEL_STREAM_3BYTE_18);
+ break;
+
+ case MIPI_DSI_FMT_RGB666_PACKED:
+ tmp = VID_PIXEL_MODE_RGB666_PACKED |
+ VID_DATATYPE(MIPI_DSI_PACKED_PIXEL_STREAM_18);
+ break;
+
+ case MIPI_DSI_FMT_RGB565:
+ tmp = VID_PIXEL_MODE_RGB565 |
+ VID_DATATYPE(MIPI_DSI_PACKED_PIXEL_STREAM_16);
+ break;
+
+ default:
+ dev_err(dsi->base.dev, "Unsupported DSI format\n");
+ return;
+ }
+
+ if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+ tmp |= SYNC_PULSE_ACTIVE | SYNC_PULSE_HORIZONTAL;
+
+ tmp |= REG_BLKLINE_MODE(REG_BLK_MODE_BLANKING_PKT) |
+ REG_BLKEOL_MODE(REG_BLK_MODE_BLANKING_PKT) |
+ RECOVERY_MODE(RECOVERY_MODE_NEXT_HSYNC) |
+ VID_IGNORE_MISS_VSYNC;
+
+ writel(tmp, dsi->regs + VID_MAIN_CTL);
+ }
+
+ tmp = readl(dsi->regs + MCTL_MAIN_DATA_CTL);
+ tmp &= ~(IF_VID_SELECT_MASK | HOST_EOT_GEN | IF_VID_MODE);
+
+ if (!(output->dev->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET))
+ tmp |= HOST_EOT_GEN;
+
+ if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO)
+ tmp |= IF_VID_MODE | IF_VID_SELECT(input->id) | VID_EN;
+
+ writel(tmp, dsi->regs + MCTL_MAIN_DATA_CTL);
+
+ tmp = readl(dsi->regs + MCTL_MAIN_EN) | IF_EN(input->id);
+ writel(tmp, dsi->regs + MCTL_MAIN_EN);
+}
+
+static void cdns_dsi_bridge_pre_enable(struct drm_bridge *bridge)
+{
+ struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
+ struct cdns_dsi *dsi = input_to_dsi(input);
+
+ if (WARN_ON(pm_runtime_get_sync(dsi->base.dev) < 0))
+ return;
+
+ cdns_dsi_init_link(dsi);
+ cdns_dsi_hs_init(dsi);
+}
+
+static const struct drm_bridge_funcs cdns_dsi_bridge_funcs = {
+ .attach = cdns_dsi_bridge_attach,
+ .mode_valid = cdns_dsi_bridge_mode_valid,
+ .disable = cdns_dsi_bridge_disable,
+ .pre_enable = cdns_dsi_bridge_pre_enable,
+ .enable = cdns_dsi_bridge_enable,
+ .post_disable = cdns_dsi_bridge_post_disable,
+};
+
+static int cdns_dsi_attach(struct mipi_dsi_host *host,
+ struct mipi_dsi_device *dev)
+{
+ struct cdns_dsi *dsi = to_cdns_dsi(host);
+ struct cdns_dsi_output *output = &dsi->output;
+ struct cdns_dsi_input *input = &dsi->input;
+ struct drm_bridge *bridge;
+ struct drm_panel *panel;
+ struct device_node *np;
+ int ret;
+
+ /*
+ * We currently do not support connecting several DSI devices to the
+ * same host. In order to support that we'd need the DRM bridge
+ * framework to allow dynamic reconfiguration of the bridge chain.
+ */
+ if (output->dev)
+ return -EBUSY;
+
+ /* We do not support burst mode yet. */
+ if (dev->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
+ return -ENOTSUPP;
+
+ /*
+ * The host <-> device link might be described using an OF-graph
+ * representation, in this case we extract the device of_node from
+ * this representation, otherwise we use dsidev->dev.of_node which
+ * should have been filled by the core.
+ */
+ np = of_graph_get_remote_node(dsi->base.dev->of_node, DSI_OUTPUT_PORT,
+ dev->channel);
+ if (!np)
+ np = of_node_get(dev->dev.of_node);
+
+ panel = of_drm_find_panel(np);
+ if (!IS_ERR(panel)) {
+ bridge = drm_panel_bridge_add_typed(panel,
+ DRM_MODE_CONNECTOR_DSI);
+ } else {
+ bridge = of_drm_find_bridge(dev->dev.of_node);
+ if (!bridge)
+ bridge = ERR_PTR(-EINVAL);
+ }
+
+ of_node_put(np);
+
+ if (IS_ERR(bridge)) {
+ ret = PTR_ERR(bridge);
+ dev_err(host->dev, "failed to add DSI device %s (err = %d)",
+ dev->name, ret);
+ return ret;
+ }
+
+ output->dev = dev;
+ output->bridge = bridge;
+ output->panel = panel;
+
+ /*
+ * The DSI output has been properly configured, we can now safely
+ * register the input to the bridge framework so that it can take place
+ * in a display pipeline.
+ */
+ drm_bridge_add(&input->bridge);
+
+ return 0;
+}
+
+static int cdns_dsi_detach(struct mipi_dsi_host *host,
+ struct mipi_dsi_device *dev)
+{
+ struct cdns_dsi *dsi = to_cdns_dsi(host);
+ struct cdns_dsi_output *output = &dsi->output;
+ struct cdns_dsi_input *input = &dsi->input;
+
+ drm_bridge_remove(&input->bridge);
+ if (output->panel)
+ drm_panel_bridge_remove(output->bridge);
+
+ return 0;
+}
+
+static irqreturn_t cdns_dsi_interrupt(int irq, void *data)
+{
+ struct cdns_dsi *dsi = data;
+ irqreturn_t ret = IRQ_NONE;
+ u32 flag, ctl;
+
+ flag = readl(dsi->regs + DIRECT_CMD_STS_FLAG);
+ if (flag) {
+ ctl = readl(dsi->regs + DIRECT_CMD_STS_CTL);
+ ctl &= ~flag;
+ writel(ctl, dsi->regs + DIRECT_CMD_STS_CTL);
+ complete(&dsi->direct_cmd_comp);
+ ret = IRQ_HANDLED;
+ }
+
+ return ret;
+}
+
+static ssize_t cdns_dsi_transfer(struct mipi_dsi_host *host,
+ const struct mipi_dsi_msg *msg)
+{
+ struct cdns_dsi *dsi = to_cdns_dsi(host);
+ u32 cmd, sts, val, wait = WRITE_COMPLETED, ctl = 0;
+ struct mipi_dsi_packet packet;
+ int ret, i, tx_len, rx_len;
+
+ ret = pm_runtime_resume_and_get(host->dev);
+ if (ret < 0)
+ return ret;
+
+ cdns_dsi_init_link(dsi);
+
+ ret = mipi_dsi_create_packet(&packet, msg);
+ if (ret)
+ goto out;
+
+ tx_len = msg->tx_buf ? msg->tx_len : 0;
+ rx_len = msg->rx_buf ? msg->rx_len : 0;
+
+ /* For read operations, the maximum TX len is 2. */
+ if (rx_len && tx_len > 2) {
+ ret = -ENOTSUPP;
+ goto out;
+ }
+
+ /* TX len is limited by the CMD FIFO depth. */
+ if (tx_len > dsi->direct_cmd_fifo_depth) {
+ ret = -ENOTSUPP;
+ goto out;
+ }
+
+ /* RX len is limited by the RX FIFO depth. */
+ if (rx_len > dsi->rx_fifo_depth) {
+ ret = -ENOTSUPP;
+ goto out;
+ }
+
+ cmd = CMD_SIZE(tx_len) | CMD_VCHAN_ID(msg->channel) |
+ CMD_DATATYPE(msg->type);
+
+ if (msg->flags & MIPI_DSI_MSG_USE_LPM)
+ cmd |= CMD_LP_EN;
+
+ if (mipi_dsi_packet_format_is_long(msg->type))
+ cmd |= CMD_LONG;
+
+ if (rx_len) {
+ cmd |= READ_CMD;
+ wait = READ_COMPLETED_WITH_ERR | READ_COMPLETED;
+ ctl = READ_EN | BTA_EN;
+ } else if (msg->flags & MIPI_DSI_MSG_REQ_ACK) {
+ cmd |= BTA_REQ;
+ wait = ACK_WITH_ERR_RCVD | ACK_RCVD;
+ ctl = BTA_EN;
+ }
+
+ writel(readl(dsi->regs + MCTL_MAIN_DATA_CTL) | ctl,
+ dsi->regs + MCTL_MAIN_DATA_CTL);
+
+ writel(cmd, dsi->regs + DIRECT_CMD_MAIN_SETTINGS);
+
+ for (i = 0; i < tx_len; i += 4) {
+ const u8 *buf = msg->tx_buf;
+ int j;
+
+ val = 0;
+ for (j = 0; j < 4 && j + i < tx_len; j++)
+ val |= (u32)buf[i + j] << (8 * j);
+
+ writel(val, dsi->regs + DIRECT_CMD_WRDATA);
+ }
+
+ /* Clear status flags before sending the command. */
+ writel(wait, dsi->regs + DIRECT_CMD_STS_CLR);
+ writel(wait, dsi->regs + DIRECT_CMD_STS_CTL);
+ reinit_completion(&dsi->direct_cmd_comp);
+ writel(0, dsi->regs + DIRECT_CMD_SEND);
+
+ wait_for_completion_timeout(&dsi->direct_cmd_comp,
+ msecs_to_jiffies(1000));
+
+ sts = readl(dsi->regs + DIRECT_CMD_STS);
+ writel(wait, dsi->regs + DIRECT_CMD_STS_CLR);
+ writel(0, dsi->regs + DIRECT_CMD_STS_CTL);
+
+ writel(readl(dsi->regs + MCTL_MAIN_DATA_CTL) & ~ctl,
+ dsi->regs + MCTL_MAIN_DATA_CTL);
+
+ /* We did not receive the events we were waiting for. */
+ if (!(sts & wait)) {
+ ret = -ETIMEDOUT;
+ goto out;
+ }
+
+ /* 'READ' or 'WRITE with ACK' failed. */
+ if (sts & (READ_COMPLETED_WITH_ERR | ACK_WITH_ERR_RCVD)) {
+ ret = -EIO;
+ goto out;
+ }
+
+ for (i = 0; i < rx_len; i += 4) {
+ u8 *buf = msg->rx_buf;
+ int j;
+
+ val = readl(dsi->regs + DIRECT_CMD_RDDATA);
+ for (j = 0; j < 4 && j + i < rx_len; j++)
+ buf[i + j] = val >> (8 * j);
+ }
+
+out:
+ pm_runtime_put(host->dev);
+ return ret;
+}
+
+static const struct mipi_dsi_host_ops cdns_dsi_ops = {
+ .attach = cdns_dsi_attach,
+ .detach = cdns_dsi_detach,
+ .transfer = cdns_dsi_transfer,
+};
+
+static int __maybe_unused cdns_dsi_resume(struct device *dev)
+{
+ struct cdns_dsi *dsi = dev_get_drvdata(dev);
+
+ reset_control_deassert(dsi->dsi_p_rst);
+ clk_prepare_enable(dsi->dsi_p_clk);
+ clk_prepare_enable(dsi->dsi_sys_clk);
+
+ return 0;
+}
+
+static int __maybe_unused cdns_dsi_suspend(struct device *dev)
+{
+ struct cdns_dsi *dsi = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(dsi->dsi_sys_clk);
+ clk_disable_unprepare(dsi->dsi_p_clk);
+ reset_control_assert(dsi->dsi_p_rst);
+ dsi->link_initialized = false;
+ return 0;
+}
+
+static UNIVERSAL_DEV_PM_OPS(cdns_dsi_pm_ops, cdns_dsi_suspend, cdns_dsi_resume,
+ NULL);
+
+static int cdns_dsi_drm_probe(struct platform_device *pdev)
+{
+ struct cdns_dsi *dsi;
+ struct cdns_dsi_input *input;
+ int ret, irq;
+ u32 val;
+
+ dsi = devm_kzalloc(&pdev->dev, sizeof(*dsi), GFP_KERNEL);
+ if (!dsi)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, dsi);
+
+ input = &dsi->input;
+
+ dsi->regs = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(dsi->regs))
+ return PTR_ERR(dsi->regs);
+
+ dsi->dsi_p_clk = devm_clk_get(&pdev->dev, "dsi_p_clk");
+ if (IS_ERR(dsi->dsi_p_clk))
+ return PTR_ERR(dsi->dsi_p_clk);
+
+ dsi->dsi_p_rst = devm_reset_control_get_optional_exclusive(&pdev->dev,
+ "dsi_p_rst");
+ if (IS_ERR(dsi->dsi_p_rst))
+ return PTR_ERR(dsi->dsi_p_rst);
+
+ dsi->dsi_sys_clk = devm_clk_get(&pdev->dev, "dsi_sys_clk");
+ if (IS_ERR(dsi->dsi_sys_clk))
+ return PTR_ERR(dsi->dsi_sys_clk);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ dsi->dphy = devm_phy_get(&pdev->dev, "dphy");
+ if (IS_ERR(dsi->dphy))
+ return PTR_ERR(dsi->dphy);
+
+ ret = clk_prepare_enable(dsi->dsi_p_clk);
+ if (ret)
+ return ret;
+
+ val = readl(dsi->regs + ID_REG);
+ if (REV_VENDOR_ID(val) != 0xcad) {
+ dev_err(&pdev->dev, "invalid vendor id\n");
+ ret = -EINVAL;
+ goto err_disable_pclk;
+ }
+
+ val = readl(dsi->regs + IP_CONF);
+ dsi->direct_cmd_fifo_depth = 1 << (DIRCMD_FIFO_DEPTH(val) + 2);
+ dsi->rx_fifo_depth = RX_FIFO_DEPTH(val);
+ init_completion(&dsi->direct_cmd_comp);
+
+ writel(0, dsi->regs + MCTL_MAIN_DATA_CTL);
+ writel(0, dsi->regs + MCTL_MAIN_EN);
+ writel(0, dsi->regs + MCTL_MAIN_PHY_CTL);
+
+ /*
+ * We only support the DPI input, so force input->id to
+ * CDNS_DPI_INPUT.
+ */
+ input->id = CDNS_DPI_INPUT;
+ input->bridge.funcs = &cdns_dsi_bridge_funcs;
+ input->bridge.of_node = pdev->dev.of_node;
+
+ /* Mask all interrupts before registering the IRQ handler. */
+ writel(0, dsi->regs + MCTL_MAIN_STS_CTL);
+ writel(0, dsi->regs + MCTL_DPHY_ERR_CTL1);
+ writel(0, dsi->regs + CMD_MODE_STS_CTL);
+ writel(0, dsi->regs + DIRECT_CMD_STS_CTL);
+ writel(0, dsi->regs + DIRECT_CMD_RD_STS_CTL);
+ writel(0, dsi->regs + VID_MODE_STS_CTL);
+ writel(0, dsi->regs + TVG_STS_CTL);
+ writel(0, dsi->regs + DPI_IRQ_EN);
+ ret = devm_request_irq(&pdev->dev, irq, cdns_dsi_interrupt, 0,
+ dev_name(&pdev->dev), dsi);
+ if (ret)
+ goto err_disable_pclk;
+
+ pm_runtime_enable(&pdev->dev);
+ dsi->base.dev = &pdev->dev;
+ dsi->base.ops = &cdns_dsi_ops;
+
+ ret = mipi_dsi_host_register(&dsi->base);
+ if (ret)
+ goto err_disable_runtime_pm;
+
+ clk_disable_unprepare(dsi->dsi_p_clk);
+
+ return 0;
+
+err_disable_runtime_pm:
+ pm_runtime_disable(&pdev->dev);
+
+err_disable_pclk:
+ clk_disable_unprepare(dsi->dsi_p_clk);
+
+ return ret;
+}
+
+static int cdns_dsi_drm_remove(struct platform_device *pdev)
+{
+ struct cdns_dsi *dsi = platform_get_drvdata(pdev);
+
+ mipi_dsi_host_unregister(&dsi->base);
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static const struct of_device_id cdns_dsi_of_match[] = {
+ { .compatible = "cdns,dsi" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, cdns_dsi_of_match);
+
+static struct platform_driver cdns_dsi_platform_driver = {
+ .probe = cdns_dsi_drm_probe,
+ .remove = cdns_dsi_drm_remove,
+ .driver = {
+ .name = "cdns-dsi",
+ .of_match_table = cdns_dsi_of_match,
+ .pm = &cdns_dsi_pm_ops,
+ },
+};
+module_platform_driver(cdns_dsi_platform_driver);
+
+MODULE_AUTHOR("Boris Brezillon <boris.brezillon@bootlin.com>");
+MODULE_DESCRIPTION("Cadence DSI driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:cdns-dsi");
+
diff --git a/drivers/gpu/drm/bridge/chipone-icn6211.c b/drivers/gpu/drm/bridge/chipone-icn6211.c
new file mode 100644
index 000000000..bf920c350
--- /dev/null
+++ b/drivers/gpu/drm/bridge/chipone-icn6211.c
@@ -0,0 +1,827 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020 Amarula Solutions(India)
+ * Author: Jagan Teki <jagan@amarulasolutions.com>
+ */
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_of.h>
+#include <drm/drm_print.h>
+#include <drm/drm_mipi_dsi.h>
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+#define VENDOR_ID 0x00
+#define DEVICE_ID_H 0x01
+#define DEVICE_ID_L 0x02
+#define VERSION_ID 0x03
+#define FIRMWARE_VERSION 0x08
+#define CONFIG_FINISH 0x09
+#define PD_CTRL(n) (0x0a + ((n) & 0x3)) /* 0..3 */
+#define RST_CTRL(n) (0x0e + ((n) & 0x1)) /* 0..1 */
+#define SYS_CTRL(n) (0x10 + ((n) & 0x7)) /* 0..4 */
+#define SYS_CTRL_1_CLK_PHASE_MSK GENMASK(5, 4)
+#define CLK_PHASE_0 0
+#define CLK_PHASE_1_4 1
+#define CLK_PHASE_1_2 2
+#define CLK_PHASE_3_4 3
+#define RGB_DRV(n) (0x18 + ((n) & 0x3)) /* 0..3 */
+#define RGB_DLY(n) (0x1c + ((n) & 0x1)) /* 0..1 */
+#define RGB_TEST_CTRL 0x1e
+#define ATE_PLL_EN 0x1f
+#define HACTIVE_LI 0x20
+#define VACTIVE_LI 0x21
+#define VACTIVE_HACTIVE_HI 0x22
+#define HFP_LI 0x23
+#define HSYNC_LI 0x24
+#define HBP_LI 0x25
+#define HFP_HSW_HBP_HI 0x26
+#define HFP_HSW_HBP_HI_HFP(n) (((n) & 0x300) >> 4)
+#define HFP_HSW_HBP_HI_HS(n) (((n) & 0x300) >> 6)
+#define HFP_HSW_HBP_HI_HBP(n) (((n) & 0x300) >> 8)
+#define VFP 0x27
+#define VSYNC 0x28
+#define VBP 0x29
+#define BIST_POL 0x2a
+#define BIST_POL_BIST_MODE(n) (((n) & 0xf) << 4)
+#define BIST_POL_BIST_GEN BIT(3)
+#define BIST_POL_HSYNC_POL BIT(2)
+#define BIST_POL_VSYNC_POL BIT(1)
+#define BIST_POL_DE_POL BIT(0)
+#define BIST_RED 0x2b
+#define BIST_GREEN 0x2c
+#define BIST_BLUE 0x2d
+#define BIST_CHESS_X 0x2e
+#define BIST_CHESS_Y 0x2f
+#define BIST_CHESS_XY_H 0x30
+#define BIST_FRAME_TIME_L 0x31
+#define BIST_FRAME_TIME_H 0x32
+#define FIFO_MAX_ADDR_LOW 0x33
+#define SYNC_EVENT_DLY 0x34
+#define HSW_MIN 0x35
+#define HFP_MIN 0x36
+#define LOGIC_RST_NUM 0x37
+#define OSC_CTRL(n) (0x48 + ((n) & 0x7)) /* 0..5 */
+#define BG_CTRL 0x4e
+#define LDO_PLL 0x4f
+#define PLL_CTRL(n) (0x50 + ((n) & 0xf)) /* 0..15 */
+#define PLL_CTRL_6_EXTERNAL 0x90
+#define PLL_CTRL_6_MIPI_CLK 0x92
+#define PLL_CTRL_6_INTERNAL 0x93
+#define PLL_REM(n) (0x60 + ((n) & 0x3)) /* 0..2 */
+#define PLL_DIV(n) (0x63 + ((n) & 0x3)) /* 0..2 */
+#define PLL_FRAC(n) (0x66 + ((n) & 0x3)) /* 0..2 */
+#define PLL_INT(n) (0x69 + ((n) & 0x1)) /* 0..1 */
+#define PLL_REF_DIV 0x6b
+#define PLL_REF_DIV_P(n) ((n) & 0xf)
+#define PLL_REF_DIV_Pe BIT(4)
+#define PLL_REF_DIV_S(n) (((n) & 0x7) << 5)
+#define PLL_SSC_P(n) (0x6c + ((n) & 0x3)) /* 0..2 */
+#define PLL_SSC_STEP(n) (0x6f + ((n) & 0x3)) /* 0..2 */
+#define PLL_SSC_OFFSET(n) (0x72 + ((n) & 0x3)) /* 0..3 */
+#define GPIO_OEN 0x79
+#define MIPI_CFG_PW 0x7a
+#define MIPI_CFG_PW_CONFIG_DSI 0xc1
+#define MIPI_CFG_PW_CONFIG_I2C 0x3e
+#define GPIO_SEL(n) (0x7b + ((n) & 0x1)) /* 0..1 */
+#define IRQ_SEL 0x7d
+#define DBG_SEL 0x7e
+#define DBG_SIGNAL 0x7f
+#define MIPI_ERR_VECTOR_L 0x80
+#define MIPI_ERR_VECTOR_H 0x81
+#define MIPI_ERR_VECTOR_EN_L 0x82
+#define MIPI_ERR_VECTOR_EN_H 0x83
+#define MIPI_MAX_SIZE_L 0x84
+#define MIPI_MAX_SIZE_H 0x85
+#define DSI_CTRL 0x86
+#define DSI_CTRL_UNKNOWN 0x28
+#define DSI_CTRL_DSI_LANES(n) ((n) & 0x3)
+#define MIPI_PN_SWAP 0x87
+#define MIPI_PN_SWAP_CLK BIT(4)
+#define MIPI_PN_SWAP_D(n) BIT((n) & 0x3)
+#define MIPI_SOT_SYNC_BIT(n) (0x88 + ((n) & 0x1)) /* 0..1 */
+#define MIPI_ULPS_CTRL 0x8a
+#define MIPI_CLK_CHK_VAR 0x8e
+#define MIPI_CLK_CHK_INI 0x8f
+#define MIPI_T_TERM_EN 0x90
+#define MIPI_T_HS_SETTLE 0x91
+#define MIPI_T_TA_SURE_PRE 0x92
+#define MIPI_T_LPX_SET 0x94
+#define MIPI_T_CLK_MISS 0x95
+#define MIPI_INIT_TIME_L 0x96
+#define MIPI_INIT_TIME_H 0x97
+#define MIPI_T_CLK_TERM_EN 0x99
+#define MIPI_T_CLK_SETTLE 0x9a
+#define MIPI_TO_HS_RX_L 0x9e
+#define MIPI_TO_HS_RX_H 0x9f
+#define MIPI_PHY(n) (0xa0 + ((n) & 0x7)) /* 0..5 */
+#define MIPI_PD_RX 0xb0
+#define MIPI_PD_TERM 0xb1
+#define MIPI_PD_HSRX 0xb2
+#define MIPI_PD_LPTX 0xb3
+#define MIPI_PD_LPRX 0xb4
+#define MIPI_PD_CK_LANE 0xb5
+#define MIPI_FORCE_0 0xb6
+#define MIPI_RST_CTRL 0xb7
+#define MIPI_RST_NUM 0xb8
+#define MIPI_DBG_SET(n) (0xc0 + ((n) & 0xf)) /* 0..9 */
+#define MIPI_DBG_SEL 0xe0
+#define MIPI_DBG_DATA 0xe1
+#define MIPI_ATE_TEST_SEL 0xe2
+#define MIPI_ATE_STATUS(n) (0xe3 + ((n) & 0x1)) /* 0..1 */
+
+struct chipone {
+ struct device *dev;
+ struct regmap *regmap;
+ struct i2c_client *client;
+ struct drm_bridge bridge;
+ struct drm_display_mode mode;
+ struct drm_bridge *panel_bridge;
+ struct mipi_dsi_device *dsi;
+ struct gpio_desc *enable_gpio;
+ struct regulator *vdd1;
+ struct regulator *vdd2;
+ struct regulator *vdd3;
+ struct clk *refclk;
+ unsigned long refclk_rate;
+ bool interface_i2c;
+};
+
+static const struct regmap_range chipone_dsi_readable_ranges[] = {
+ regmap_reg_range(VENDOR_ID, VERSION_ID),
+ regmap_reg_range(FIRMWARE_VERSION, PLL_SSC_OFFSET(3)),
+ regmap_reg_range(GPIO_OEN, MIPI_ULPS_CTRL),
+ regmap_reg_range(MIPI_CLK_CHK_VAR, MIPI_T_TA_SURE_PRE),
+ regmap_reg_range(MIPI_T_LPX_SET, MIPI_INIT_TIME_H),
+ regmap_reg_range(MIPI_T_CLK_TERM_EN, MIPI_T_CLK_SETTLE),
+ regmap_reg_range(MIPI_TO_HS_RX_L, MIPI_PHY(5)),
+ regmap_reg_range(MIPI_PD_RX, MIPI_RST_NUM),
+ regmap_reg_range(MIPI_DBG_SET(0), MIPI_DBG_SET(9)),
+ regmap_reg_range(MIPI_DBG_SEL, MIPI_ATE_STATUS(1)),
+};
+
+static const struct regmap_access_table chipone_dsi_readable_table = {
+ .yes_ranges = chipone_dsi_readable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(chipone_dsi_readable_ranges),
+};
+
+static const struct regmap_range chipone_dsi_writeable_ranges[] = {
+ regmap_reg_range(CONFIG_FINISH, PLL_SSC_OFFSET(3)),
+ regmap_reg_range(GPIO_OEN, MIPI_ULPS_CTRL),
+ regmap_reg_range(MIPI_CLK_CHK_VAR, MIPI_T_TA_SURE_PRE),
+ regmap_reg_range(MIPI_T_LPX_SET, MIPI_INIT_TIME_H),
+ regmap_reg_range(MIPI_T_CLK_TERM_EN, MIPI_T_CLK_SETTLE),
+ regmap_reg_range(MIPI_TO_HS_RX_L, MIPI_PHY(5)),
+ regmap_reg_range(MIPI_PD_RX, MIPI_RST_NUM),
+ regmap_reg_range(MIPI_DBG_SET(0), MIPI_DBG_SET(9)),
+ regmap_reg_range(MIPI_DBG_SEL, MIPI_ATE_STATUS(1)),
+};
+
+static const struct regmap_access_table chipone_dsi_writeable_table = {
+ .yes_ranges = chipone_dsi_writeable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(chipone_dsi_writeable_ranges),
+};
+
+static const struct regmap_config chipone_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .rd_table = &chipone_dsi_readable_table,
+ .wr_table = &chipone_dsi_writeable_table,
+ .cache_type = REGCACHE_RBTREE,
+ .max_register = MIPI_ATE_STATUS(1),
+};
+
+static int chipone_dsi_read(void *context,
+ const void *reg, size_t reg_size,
+ void *val, size_t val_size)
+{
+ struct mipi_dsi_device *dsi = context;
+ const u16 reg16 = (val_size << 8) | *(u8 *)reg;
+ int ret;
+
+ ret = mipi_dsi_generic_read(dsi, &reg16, 2, val, val_size);
+
+ return ret == val_size ? 0 : -EINVAL;
+}
+
+static int chipone_dsi_write(void *context, const void *data, size_t count)
+{
+ struct mipi_dsi_device *dsi = context;
+
+ return mipi_dsi_generic_write(dsi, data, 2);
+}
+
+static const struct regmap_bus chipone_dsi_regmap_bus = {
+ .read = chipone_dsi_read,
+ .write = chipone_dsi_write,
+ .reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
+ .val_format_endian_default = REGMAP_ENDIAN_NATIVE,
+};
+
+static inline struct chipone *bridge_to_chipone(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct chipone, bridge);
+}
+
+static void chipone_readb(struct chipone *icn, u8 reg, u8 *val)
+{
+ int ret, pval;
+
+ ret = regmap_read(icn->regmap, reg, &pval);
+
+ *val = ret ? 0 : pval & 0xff;
+}
+
+static int chipone_writeb(struct chipone *icn, u8 reg, u8 val)
+{
+ return regmap_write(icn->regmap, reg, val);
+}
+
+static void chipone_configure_pll(struct chipone *icn,
+ const struct drm_display_mode *mode)
+{
+ unsigned int best_p = 0, best_m = 0, best_s = 0;
+ unsigned int mode_clock = mode->clock * 1000;
+ unsigned int delta, min_delta = 0xffffffff;
+ unsigned int freq_p, freq_s, freq_out;
+ unsigned int p_min, p_max;
+ unsigned int p, m, s;
+ unsigned int fin;
+ bool best_p_pot;
+ u8 ref_div;
+
+ /*
+ * DSI byte clock frequency (input into PLL) is calculated as:
+ * DSI_CLK = HS clock / 4
+ *
+ * DPI pixel clock frequency (output from PLL) is mode clock.
+ *
+ * The chip contains fractional PLL which works as follows:
+ * DPI_CLK = ((DSI_CLK / P) * M) / S
+ * P is pre-divider, register PLL_REF_DIV[3:0] is 1:n divider
+ * register PLL_REF_DIV[4] is extra 1:2 divider
+ * M is integer multiplier, register PLL_INT(0) is multiplier
+ * S is post-divider, register PLL_REF_DIV[7:5] is 2^(n+1) divider
+ *
+ * It seems the PLL input clock after applying P pre-divider have
+ * to be lower than 20 MHz.
+ */
+ if (icn->refclk)
+ fin = icn->refclk_rate;
+ else
+ fin = icn->dsi->hs_rate / 4; /* in Hz */
+
+ /* Minimum value of P predivider for PLL input in 5..20 MHz */
+ p_min = clamp(DIV_ROUND_UP(fin, 20000000), 1U, 31U);
+ p_max = clamp(fin / 5000000, 1U, 31U);
+
+ for (p = p_min; p < p_max; p++) { /* PLL_REF_DIV[4,3:0] */
+ if (p > 16 && p & 1) /* P > 16 uses extra /2 */
+ continue;
+ freq_p = fin / p;
+ if (freq_p == 0) /* Divider too high */
+ break;
+
+ for (s = 0; s < 0x7; s++) { /* PLL_REF_DIV[7:5] */
+ freq_s = freq_p / BIT(s + 1);
+ if (freq_s == 0) /* Divider too high */
+ break;
+
+ m = mode_clock / freq_s;
+
+ /* Multiplier is 8 bit */
+ if (m > 0xff)
+ continue;
+
+ /* Limit PLL VCO frequency to 1 GHz */
+ freq_out = (fin * m) / p;
+ if (freq_out > 1000000000)
+ continue;
+
+ /* Apply post-divider */
+ freq_out /= BIT(s + 1);
+
+ delta = abs(mode_clock - freq_out);
+ if (delta < min_delta) {
+ best_p = p;
+ best_m = m;
+ best_s = s;
+ min_delta = delta;
+ }
+ }
+ }
+
+ best_p_pot = !(best_p & 1);
+
+ dev_dbg(icn->dev,
+ "PLL: P[3:0]=%d P[4]=2*%d M=%d S[7:5]=2^%d delta=%d => DSI f_in(%s)=%d Hz ; DPI f_out=%d Hz\n",
+ best_p >> best_p_pot, best_p_pot, best_m, best_s + 1,
+ min_delta, icn->refclk ? "EXT" : "DSI", fin,
+ (fin * best_m) / (best_p << (best_s + 1)));
+
+ ref_div = PLL_REF_DIV_P(best_p >> best_p_pot) | PLL_REF_DIV_S(best_s);
+ if (best_p_pot) /* Prefer /2 pre-divider */
+ ref_div |= PLL_REF_DIV_Pe;
+
+ /* Clock source selection either external clock or MIPI DSI clock lane */
+ chipone_writeb(icn, PLL_CTRL(6),
+ icn->refclk ? PLL_CTRL_6_EXTERNAL : PLL_CTRL_6_MIPI_CLK);
+ chipone_writeb(icn, PLL_REF_DIV, ref_div);
+ chipone_writeb(icn, PLL_INT(0), best_m);
+}
+
+static void chipone_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct chipone *icn = bridge_to_chipone(bridge);
+ struct drm_atomic_state *state = old_bridge_state->base.state;
+ struct drm_display_mode *mode = &icn->mode;
+ const struct drm_bridge_state *bridge_state;
+ u16 hfp, hbp, hsync;
+ u32 bus_flags;
+ u8 pol, sys_ctrl_1, id[4];
+
+ chipone_readb(icn, VENDOR_ID, id);
+ chipone_readb(icn, DEVICE_ID_H, id + 1);
+ chipone_readb(icn, DEVICE_ID_L, id + 2);
+ chipone_readb(icn, VERSION_ID, id + 3);
+
+ dev_dbg(icn->dev,
+ "Chip IDs: Vendor=0x%02x Device=0x%02x:0x%02x Version=0x%02x\n",
+ id[0], id[1], id[2], id[3]);
+
+ if (id[0] != 0xc1 || id[1] != 0x62 || id[2] != 0x11) {
+ dev_dbg(icn->dev, "Invalid Chip IDs, aborting configuration\n");
+ return;
+ }
+
+ /* Get the DPI flags from the bridge state. */
+ bridge_state = drm_atomic_get_new_bridge_state(state, bridge);
+ bus_flags = bridge_state->output_bus_cfg.flags;
+
+ if (icn->interface_i2c)
+ chipone_writeb(icn, MIPI_CFG_PW, MIPI_CFG_PW_CONFIG_I2C);
+ else
+ chipone_writeb(icn, MIPI_CFG_PW, MIPI_CFG_PW_CONFIG_DSI);
+
+ chipone_writeb(icn, HACTIVE_LI, mode->hdisplay & 0xff);
+
+ chipone_writeb(icn, VACTIVE_LI, mode->vdisplay & 0xff);
+
+ /*
+ * lsb nibble: 2nd nibble of hdisplay
+ * msb nibble: 2nd nibble of vdisplay
+ */
+ chipone_writeb(icn, VACTIVE_HACTIVE_HI,
+ ((mode->hdisplay >> 8) & 0xf) |
+ (((mode->vdisplay >> 8) & 0xf) << 4));
+
+ hfp = mode->hsync_start - mode->hdisplay;
+ hsync = mode->hsync_end - mode->hsync_start;
+ hbp = mode->htotal - mode->hsync_end;
+
+ chipone_writeb(icn, HFP_LI, hfp & 0xff);
+ chipone_writeb(icn, HSYNC_LI, hsync & 0xff);
+ chipone_writeb(icn, HBP_LI, hbp & 0xff);
+ /* Top two bits of Horizontal Front porch/Sync/Back porch */
+ chipone_writeb(icn, HFP_HSW_HBP_HI,
+ HFP_HSW_HBP_HI_HFP(hfp) |
+ HFP_HSW_HBP_HI_HS(hsync) |
+ HFP_HSW_HBP_HI_HBP(hbp));
+
+ chipone_writeb(icn, VFP, mode->vsync_start - mode->vdisplay);
+
+ chipone_writeb(icn, VSYNC, mode->vsync_end - mode->vsync_start);
+
+ chipone_writeb(icn, VBP, mode->vtotal - mode->vsync_end);
+
+ /* dsi specific sequence */
+ chipone_writeb(icn, SYNC_EVENT_DLY, 0x80);
+ chipone_writeb(icn, HFP_MIN, hfp & 0xff);
+
+ /* DSI data lane count */
+ chipone_writeb(icn, DSI_CTRL,
+ DSI_CTRL_UNKNOWN | DSI_CTRL_DSI_LANES(icn->dsi->lanes - 1));
+
+ chipone_writeb(icn, MIPI_PD_CK_LANE, 0xa0);
+ chipone_writeb(icn, PLL_CTRL(12), 0xff);
+ chipone_writeb(icn, MIPI_PN_SWAP, 0x00);
+
+ /* DPI HS/VS/DE polarity */
+ pol = ((mode->flags & DRM_MODE_FLAG_PHSYNC) ? BIST_POL_HSYNC_POL : 0) |
+ ((mode->flags & DRM_MODE_FLAG_PVSYNC) ? BIST_POL_VSYNC_POL : 0) |
+ ((bus_flags & DRM_BUS_FLAG_DE_HIGH) ? BIST_POL_DE_POL : 0);
+ chipone_writeb(icn, BIST_POL, pol);
+
+ /* Configure PLL settings */
+ chipone_configure_pll(icn, mode);
+
+ chipone_writeb(icn, SYS_CTRL(0), 0x40);
+ sys_ctrl_1 = 0x88;
+
+ if (bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE)
+ sys_ctrl_1 |= FIELD_PREP(SYS_CTRL_1_CLK_PHASE_MSK, CLK_PHASE_0);
+ else
+ sys_ctrl_1 |= FIELD_PREP(SYS_CTRL_1_CLK_PHASE_MSK, CLK_PHASE_1_2);
+
+ chipone_writeb(icn, SYS_CTRL(1), sys_ctrl_1);
+
+ /* icn6211 specific sequence */
+ chipone_writeb(icn, MIPI_FORCE_0, 0x20);
+ chipone_writeb(icn, PLL_CTRL(1), 0x20);
+ chipone_writeb(icn, CONFIG_FINISH, 0x10);
+
+ usleep_range(10000, 11000);
+}
+
+static void chipone_atomic_pre_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct chipone *icn = bridge_to_chipone(bridge);
+ int ret;
+
+ if (icn->vdd1) {
+ ret = regulator_enable(icn->vdd1);
+ if (ret)
+ DRM_DEV_ERROR(icn->dev,
+ "failed to enable VDD1 regulator: %d\n", ret);
+ }
+
+ if (icn->vdd2) {
+ ret = regulator_enable(icn->vdd2);
+ if (ret)
+ DRM_DEV_ERROR(icn->dev,
+ "failed to enable VDD2 regulator: %d\n", ret);
+ }
+
+ if (icn->vdd3) {
+ ret = regulator_enable(icn->vdd3);
+ if (ret)
+ DRM_DEV_ERROR(icn->dev,
+ "failed to enable VDD3 regulator: %d\n", ret);
+ }
+
+ ret = clk_prepare_enable(icn->refclk);
+ if (ret)
+ DRM_DEV_ERROR(icn->dev,
+ "failed to enable RECLK clock: %d\n", ret);
+
+ gpiod_set_value(icn->enable_gpio, 1);
+
+ usleep_range(10000, 11000);
+}
+
+static void chipone_atomic_post_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct chipone *icn = bridge_to_chipone(bridge);
+
+ clk_disable_unprepare(icn->refclk);
+
+ if (icn->vdd1)
+ regulator_disable(icn->vdd1);
+
+ if (icn->vdd2)
+ regulator_disable(icn->vdd2);
+
+ if (icn->vdd3)
+ regulator_disable(icn->vdd3);
+
+ gpiod_set_value(icn->enable_gpio, 0);
+}
+
+static void chipone_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ struct chipone *icn = bridge_to_chipone(bridge);
+
+ drm_mode_copy(&icn->mode, adjusted_mode);
+};
+
+static int chipone_dsi_attach(struct chipone *icn)
+{
+ struct mipi_dsi_device *dsi = icn->dsi;
+ struct device *dev = icn->dev;
+ int dsi_lanes, ret;
+
+ dsi_lanes = drm_of_get_data_lanes_count_ep(dev->of_node, 0, 0, 1, 4);
+
+ /*
+ * If the 'data-lanes' property does not exist in DT or is invalid,
+ * default to previously hard-coded behavior, which was 4 data lanes.
+ */
+ if (dsi_lanes < 0)
+ icn->dsi->lanes = 4;
+ else
+ icn->dsi->lanes = dsi_lanes;
+
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
+ MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET;
+ dsi->hs_rate = 500000000;
+ dsi->lp_rate = 16000000;
+
+ ret = mipi_dsi_attach(dsi);
+ if (ret < 0)
+ dev_err(icn->dev, "failed to attach dsi\n");
+
+ return ret;
+}
+
+static int chipone_dsi_host_attach(struct chipone *icn)
+{
+ struct device *dev = icn->dev;
+ struct device_node *host_node;
+ struct device_node *endpoint;
+ struct mipi_dsi_device *dsi;
+ struct mipi_dsi_host *host;
+ int ret = 0;
+
+ const struct mipi_dsi_device_info info = {
+ .type = "chipone",
+ .channel = 0,
+ .node = NULL,
+ };
+
+ endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
+ host_node = of_graph_get_remote_port_parent(endpoint);
+ of_node_put(endpoint);
+
+ if (!host_node)
+ return -EINVAL;
+
+ host = of_find_mipi_dsi_host_by_node(host_node);
+ of_node_put(host_node);
+ if (!host) {
+ dev_err(dev, "failed to find dsi host\n");
+ return -EPROBE_DEFER;
+ }
+
+ dsi = mipi_dsi_device_register_full(host, &info);
+ if (IS_ERR(dsi)) {
+ return dev_err_probe(dev, PTR_ERR(dsi),
+ "failed to create dsi device\n");
+ }
+
+ icn->dsi = dsi;
+
+ ret = chipone_dsi_attach(icn);
+ if (ret < 0)
+ mipi_dsi_device_unregister(dsi);
+
+ return ret;
+}
+
+static int chipone_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flags flags)
+{
+ struct chipone *icn = bridge_to_chipone(bridge);
+
+ return drm_bridge_attach(bridge->encoder, icn->panel_bridge, bridge, flags);
+}
+
+#define MAX_INPUT_SEL_FORMATS 1
+
+static u32 *
+chipone_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ u32 *input_fmts;
+
+ *num_input_fmts = 0;
+
+ input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
+ GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ /* This is the DSI-end bus format */
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
+ *num_input_fmts = 1;
+
+ return input_fmts;
+}
+
+static const struct drm_bridge_funcs chipone_bridge_funcs = {
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .atomic_pre_enable = chipone_atomic_pre_enable,
+ .atomic_enable = chipone_atomic_enable,
+ .atomic_post_disable = chipone_atomic_post_disable,
+ .mode_set = chipone_mode_set,
+ .attach = chipone_attach,
+ .atomic_get_input_bus_fmts = chipone_atomic_get_input_bus_fmts,
+};
+
+static int chipone_parse_dt(struct chipone *icn)
+{
+ struct device *dev = icn->dev;
+ int ret;
+
+ icn->refclk = devm_clk_get_optional(dev, "refclk");
+ if (IS_ERR(icn->refclk)) {
+ ret = PTR_ERR(icn->refclk);
+ DRM_DEV_ERROR(dev, "failed to get REFCLK clock: %d\n", ret);
+ return ret;
+ } else if (icn->refclk) {
+ icn->refclk_rate = clk_get_rate(icn->refclk);
+ if (icn->refclk_rate < 10000000 || icn->refclk_rate > 154000000) {
+ DRM_DEV_ERROR(dev, "REFCLK out of range: %ld Hz\n",
+ icn->refclk_rate);
+ return -EINVAL;
+ }
+ }
+
+ icn->vdd1 = devm_regulator_get_optional(dev, "vdd1");
+ if (IS_ERR(icn->vdd1)) {
+ ret = PTR_ERR(icn->vdd1);
+ if (ret == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ icn->vdd1 = NULL;
+ DRM_DEV_DEBUG(dev, "failed to get VDD1 regulator: %d\n", ret);
+ }
+
+ icn->vdd2 = devm_regulator_get_optional(dev, "vdd2");
+ if (IS_ERR(icn->vdd2)) {
+ ret = PTR_ERR(icn->vdd2);
+ if (ret == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ icn->vdd2 = NULL;
+ DRM_DEV_DEBUG(dev, "failed to get VDD2 regulator: %d\n", ret);
+ }
+
+ icn->vdd3 = devm_regulator_get_optional(dev, "vdd3");
+ if (IS_ERR(icn->vdd3)) {
+ ret = PTR_ERR(icn->vdd3);
+ if (ret == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ icn->vdd3 = NULL;
+ DRM_DEV_DEBUG(dev, "failed to get VDD3 regulator: %d\n", ret);
+ }
+
+ icn->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(icn->enable_gpio)) {
+ DRM_DEV_ERROR(dev, "failed to get enable GPIO\n");
+ return PTR_ERR(icn->enable_gpio);
+ }
+
+ icn->panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);
+ if (IS_ERR(icn->panel_bridge))
+ return PTR_ERR(icn->panel_bridge);
+
+ return 0;
+}
+
+static int chipone_common_probe(struct device *dev, struct chipone **icnr)
+{
+ struct chipone *icn;
+ int ret;
+
+ icn = devm_kzalloc(dev, sizeof(struct chipone), GFP_KERNEL);
+ if (!icn)
+ return -ENOMEM;
+
+ icn->dev = dev;
+
+ ret = chipone_parse_dt(icn);
+ if (ret)
+ return ret;
+
+ icn->bridge.funcs = &chipone_bridge_funcs;
+ icn->bridge.type = DRM_MODE_CONNECTOR_DPI;
+ icn->bridge.of_node = dev->of_node;
+
+ *icnr = icn;
+
+ return ret;
+}
+
+static int chipone_dsi_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct chipone *icn;
+ int ret;
+
+ ret = chipone_common_probe(dev, &icn);
+ if (ret)
+ return ret;
+
+ icn->regmap = devm_regmap_init(dev, &chipone_dsi_regmap_bus,
+ dsi, &chipone_regmap_config);
+ if (IS_ERR(icn->regmap))
+ return PTR_ERR(icn->regmap);
+
+ icn->interface_i2c = false;
+ icn->dsi = dsi;
+
+ mipi_dsi_set_drvdata(dsi, icn);
+
+ drm_bridge_add(&icn->bridge);
+
+ ret = chipone_dsi_attach(icn);
+ if (ret)
+ drm_bridge_remove(&icn->bridge);
+
+ return ret;
+}
+
+static int chipone_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct chipone *icn;
+ int ret;
+
+ ret = chipone_common_probe(dev, &icn);
+ if (ret)
+ return ret;
+
+ icn->regmap = devm_regmap_init_i2c(client, &chipone_regmap_config);
+ if (IS_ERR(icn->regmap))
+ return PTR_ERR(icn->regmap);
+
+ icn->interface_i2c = true;
+ icn->client = client;
+ dev_set_drvdata(dev, icn);
+ i2c_set_clientdata(client, icn);
+
+ drm_bridge_add(&icn->bridge);
+
+ return chipone_dsi_host_attach(icn);
+}
+
+static void chipone_dsi_remove(struct mipi_dsi_device *dsi)
+{
+ struct chipone *icn = mipi_dsi_get_drvdata(dsi);
+
+ mipi_dsi_detach(dsi);
+ drm_bridge_remove(&icn->bridge);
+}
+
+static const struct of_device_id chipone_of_match[] = {
+ { .compatible = "chipone,icn6211", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, chipone_of_match);
+
+static struct mipi_dsi_driver chipone_dsi_driver = {
+ .probe = chipone_dsi_probe,
+ .remove = chipone_dsi_remove,
+ .driver = {
+ .name = "chipone-icn6211",
+ .owner = THIS_MODULE,
+ .of_match_table = chipone_of_match,
+ },
+};
+
+static struct i2c_device_id chipone_i2c_id[] = {
+ { "chipone,icn6211" },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, chipone_i2c_id);
+
+static struct i2c_driver chipone_i2c_driver = {
+ .probe = chipone_i2c_probe,
+ .id_table = chipone_i2c_id,
+ .driver = {
+ .name = "chipone-icn6211-i2c",
+ .of_match_table = chipone_of_match,
+ },
+};
+
+static int __init chipone_init(void)
+{
+ if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
+ mipi_dsi_driver_register(&chipone_dsi_driver);
+
+ return i2c_add_driver(&chipone_i2c_driver);
+}
+module_init(chipone_init);
+
+static void __exit chipone_exit(void)
+{
+ i2c_del_driver(&chipone_i2c_driver);
+
+ if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
+ mipi_dsi_driver_unregister(&chipone_dsi_driver);
+}
+module_exit(chipone_exit);
+
+MODULE_AUTHOR("Jagan Teki <jagan@amarulasolutions.com>");
+MODULE_DESCRIPTION("Chipone ICN6211 MIPI-DSI to RGB Converter Bridge");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/bridge/chrontel-ch7033.c b/drivers/gpu/drm/bridge/chrontel-ch7033.c
new file mode 100644
index 000000000..b94f39a86
--- /dev/null
+++ b/drivers/gpu/drm/bridge/chrontel-ch7033.c
@@ -0,0 +1,620 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Chrontel CH7033 Video Encoder Driver
+ *
+ * Copyright (C) 2019,2020 Lubomir Rintel
+ */
+
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_of.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+/* Page 0, Register 0x07 */
+enum {
+ DRI_PD = BIT(3),
+ IO_PD = BIT(5),
+};
+
+/* Page 0, Register 0x08 */
+enum {
+ DRI_PDDRI = GENMASK(7, 4),
+ PDDAC = GENMASK(3, 1),
+ PANEN = BIT(0),
+};
+
+/* Page 0, Register 0x09 */
+enum {
+ DPD = BIT(7),
+ GCKOFF = BIT(6),
+ TV_BP = BIT(5),
+ SCLPD = BIT(4),
+ SDPD = BIT(3),
+ VGA_PD = BIT(2),
+ HDBKPD = BIT(1),
+ HDMI_PD = BIT(0),
+};
+
+/* Page 0, Register 0x0a */
+enum {
+ MEMINIT = BIT(7),
+ MEMIDLE = BIT(6),
+ MEMPD = BIT(5),
+ STOP = BIT(4),
+ LVDS_PD = BIT(3),
+ HD_DVIB = BIT(2),
+ HDCP_PD = BIT(1),
+ MCU_PD = BIT(0),
+};
+
+/* Page 0, Register 0x18 */
+enum {
+ IDF = GENMASK(7, 4),
+ INTEN = BIT(3),
+ SWAP = GENMASK(2, 0),
+};
+
+enum {
+ BYTE_SWAP_RGB = 0,
+ BYTE_SWAP_RBG = 1,
+ BYTE_SWAP_GRB = 2,
+ BYTE_SWAP_GBR = 3,
+ BYTE_SWAP_BRG = 4,
+ BYTE_SWAP_BGR = 5,
+};
+
+/* Page 0, Register 0x19 */
+enum {
+ HPO_I = BIT(5),
+ VPO_I = BIT(4),
+ DEPO_I = BIT(3),
+ CRYS_EN = BIT(2),
+ GCLKFREQ = GENMASK(2, 0),
+};
+
+/* Page 0, Register 0x2e */
+enum {
+ HFLIP = BIT(7),
+ VFLIP = BIT(6),
+ DEPO_O = BIT(5),
+ HPO_O = BIT(4),
+ VPO_O = BIT(3),
+ TE = GENMASK(2, 0),
+};
+
+/* Page 0, Register 0x2b */
+enum {
+ SWAPS = GENMASK(7, 4),
+ VFMT = GENMASK(3, 0),
+};
+
+/* Page 0, Register 0x54 */
+enum {
+ COMP_BP = BIT(7),
+ DAC_EN_T = BIT(6),
+ HWO_HDMI_HI = GENMASK(5, 3),
+ HOO_HDMI_HI = GENMASK(2, 0),
+};
+
+/* Page 0, Register 0x57 */
+enum {
+ FLDSEN = BIT(7),
+ VWO_HDMI_HI = GENMASK(5, 3),
+ VOO_HDMI_HI = GENMASK(2, 0),
+};
+
+/* Page 0, Register 0x7e */
+enum {
+ HDMI_LVDS_SEL = BIT(7),
+ DE_GEN = BIT(6),
+ PWM_INDEX_HI = BIT(5),
+ USE_DE = BIT(4),
+ R_INT = GENMASK(3, 0),
+};
+
+/* Page 1, Register 0x07 */
+enum {
+ BPCKSEL = BIT(7),
+ DRI_CMFB_EN = BIT(6),
+ CEC_PUEN = BIT(5),
+ CEC_T = BIT(3),
+ CKINV = BIT(2),
+ CK_TVINV = BIT(1),
+ DRI_CKS2 = BIT(0),
+};
+
+/* Page 1, Register 0x08 */
+enum {
+ DACG = BIT(6),
+ DACKTST = BIT(5),
+ DEDGEB = BIT(4),
+ SYO = BIT(3),
+ DRI_IT_LVDS = GENMASK(2, 1),
+ DISPON = BIT(0),
+};
+
+/* Page 1, Register 0x0c */
+enum {
+ DRI_PLL_CP = GENMASK(7, 6),
+ DRI_PLL_DIVSEL = BIT(5),
+ DRI_PLL_N1_1 = BIT(4),
+ DRI_PLL_N1_0 = BIT(3),
+ DRI_PLL_N3_1 = BIT(2),
+ DRI_PLL_N3_0 = BIT(1),
+ DRI_PLL_CKTSTEN = BIT(0),
+};
+
+/* Page 1, Register 0x6b */
+enum {
+ VCO3CS = GENMASK(7, 6),
+ ICPGBK2_0 = GENMASK(5, 3),
+ DRI_VCO357SC = BIT(2),
+ PDPLL2 = BIT(1),
+ DRI_PD_SER = BIT(0),
+};
+
+/* Page 1, Register 0x6c */
+enum {
+ PLL2N11 = GENMASK(7, 4),
+ PLL2N5_4 = BIT(3),
+ PLL2N5_TOP = BIT(2),
+ DRI_PLL_PD = BIT(1),
+ PD_I2CM = BIT(0),
+};
+
+/* Page 3, Register 0x28 */
+enum {
+ DIFF_EN = GENMASK(7, 6),
+ CORREC_EN = GENMASK(5, 4),
+ VGACLK_BP = BIT(3),
+ HM_LV_SEL = BIT(2),
+ HD_VGA_SEL = BIT(1),
+};
+
+/* Page 3, Register 0x2a */
+enum {
+ LVDSCLK_BP = BIT(7),
+ HDTVCLK_BP = BIT(6),
+ HDMICLK_BP = BIT(5),
+ HDTV_BP = BIT(4),
+ HDMI_BP = BIT(3),
+ THRWL = GENMASK(2, 0),
+};
+
+/* Page 4, Register 0x52 */
+enum {
+ PGM_ARSTB = BIT(7),
+ MCU_ARSTB = BIT(6),
+ MCU_RETB = BIT(2),
+ RESETIB = BIT(1),
+ RESETDB = BIT(0),
+};
+
+struct ch7033_priv {
+ struct regmap *regmap;
+ struct drm_bridge *next_bridge;
+ struct drm_bridge bridge;
+ struct drm_connector connector;
+};
+
+#define conn_to_ch7033_priv(x) \
+ container_of(x, struct ch7033_priv, connector)
+#define bridge_to_ch7033_priv(x) \
+ container_of(x, struct ch7033_priv, bridge)
+
+
+static enum drm_connector_status ch7033_connector_detect(
+ struct drm_connector *connector, bool force)
+{
+ struct ch7033_priv *priv = conn_to_ch7033_priv(connector);
+
+ return drm_bridge_detect(priv->next_bridge);
+}
+
+static const struct drm_connector_funcs ch7033_connector_funcs = {
+ .reset = drm_atomic_helper_connector_reset,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .detect = ch7033_connector_detect,
+ .destroy = drm_connector_cleanup,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int ch7033_connector_get_modes(struct drm_connector *connector)
+{
+ struct ch7033_priv *priv = conn_to_ch7033_priv(connector);
+ struct edid *edid;
+ int ret;
+
+ edid = drm_bridge_get_edid(priv->next_bridge, connector);
+ drm_connector_update_edid_property(connector, edid);
+ if (edid) {
+ ret = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+ } else {
+ ret = drm_add_modes_noedid(connector, 1920, 1080);
+ drm_set_preferred_mode(connector, 1024, 768);
+ }
+
+ return ret;
+}
+
+static struct drm_encoder *ch7033_connector_best_encoder(
+ struct drm_connector *connector)
+{
+ struct ch7033_priv *priv = conn_to_ch7033_priv(connector);
+
+ return priv->bridge.encoder;
+}
+
+static const struct drm_connector_helper_funcs ch7033_connector_helper_funcs = {
+ .get_modes = ch7033_connector_get_modes,
+ .best_encoder = ch7033_connector_best_encoder,
+};
+
+static void ch7033_hpd_event(void *arg, enum drm_connector_status status)
+{
+ struct ch7033_priv *priv = arg;
+
+ if (priv->bridge.dev)
+ drm_helper_hpd_irq_event(priv->connector.dev);
+}
+
+static int ch7033_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct ch7033_priv *priv = bridge_to_ch7033_priv(bridge);
+ struct drm_connector *connector = &priv->connector;
+ int ret;
+
+ ret = drm_bridge_attach(bridge->encoder, priv->next_bridge, bridge,
+ DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+ if (ret)
+ return ret;
+
+ if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
+ return 0;
+
+ if (priv->next_bridge->ops & DRM_BRIDGE_OP_DETECT) {
+ connector->polled = DRM_CONNECTOR_POLL_HPD;
+ } else {
+ connector->polled = DRM_CONNECTOR_POLL_CONNECT |
+ DRM_CONNECTOR_POLL_DISCONNECT;
+ }
+
+ if (priv->next_bridge->ops & DRM_BRIDGE_OP_HPD) {
+ drm_bridge_hpd_enable(priv->next_bridge, ch7033_hpd_event,
+ priv);
+ }
+
+ drm_connector_helper_add(connector,
+ &ch7033_connector_helper_funcs);
+ ret = drm_connector_init_with_ddc(bridge->dev, &priv->connector,
+ &ch7033_connector_funcs,
+ priv->next_bridge->type,
+ priv->next_bridge->ddc);
+ if (ret) {
+ DRM_ERROR("Failed to initialize connector\n");
+ return ret;
+ }
+
+ return drm_connector_attach_encoder(&priv->connector, bridge->encoder);
+}
+
+static void ch7033_bridge_detach(struct drm_bridge *bridge)
+{
+ struct ch7033_priv *priv = bridge_to_ch7033_priv(bridge);
+
+ if (priv->next_bridge->ops & DRM_BRIDGE_OP_HPD)
+ drm_bridge_hpd_disable(priv->next_bridge);
+ drm_connector_cleanup(&priv->connector);
+}
+
+static enum drm_mode_status ch7033_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ if (mode->clock > 165000)
+ return MODE_CLOCK_HIGH;
+ if (mode->hdisplay >= 1920)
+ return MODE_BAD_HVALUE;
+ if (mode->vdisplay >= 1080)
+ return MODE_BAD_VVALUE;
+ return MODE_OK;
+}
+
+static void ch7033_bridge_disable(struct drm_bridge *bridge)
+{
+ struct ch7033_priv *priv = bridge_to_ch7033_priv(bridge);
+
+ regmap_write(priv->regmap, 0x03, 0x04);
+ regmap_update_bits(priv->regmap, 0x52, RESETDB, 0x00);
+}
+
+static void ch7033_bridge_enable(struct drm_bridge *bridge)
+{
+ struct ch7033_priv *priv = bridge_to_ch7033_priv(bridge);
+
+ regmap_write(priv->regmap, 0x03, 0x04);
+ regmap_update_bits(priv->regmap, 0x52, RESETDB, RESETDB);
+}
+
+static void ch7033_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ struct ch7033_priv *priv = bridge_to_ch7033_priv(bridge);
+ int hbporch = mode->hsync_start - mode->hdisplay;
+ int hsynclen = mode->hsync_end - mode->hsync_start;
+ int vbporch = mode->vsync_start - mode->vdisplay;
+ int vsynclen = mode->vsync_end - mode->vsync_start;
+
+ /*
+ * Page 4
+ */
+ regmap_write(priv->regmap, 0x03, 0x04);
+
+ /* Turn everything off to set all the registers to their defaults. */
+ regmap_write(priv->regmap, 0x52, 0x00);
+ /* Bring I/O block up. */
+ regmap_write(priv->regmap, 0x52, RESETIB);
+
+ /*
+ * Page 0
+ */
+ regmap_write(priv->regmap, 0x03, 0x00);
+
+ /* Bring up parts we need from the power down. */
+ regmap_update_bits(priv->regmap, 0x07, DRI_PD | IO_PD, 0);
+ regmap_update_bits(priv->regmap, 0x08, DRI_PDDRI | PDDAC | PANEN, 0);
+ regmap_update_bits(priv->regmap, 0x09, DPD | GCKOFF |
+ HDMI_PD | VGA_PD, 0);
+ regmap_update_bits(priv->regmap, 0x0a, HD_DVIB, 0);
+
+ /* Horizontal input timing. */
+ regmap_write(priv->regmap, 0x0b, (mode->htotal >> 8) << 3 |
+ (mode->hdisplay >> 8));
+ regmap_write(priv->regmap, 0x0c, mode->hdisplay);
+ regmap_write(priv->regmap, 0x0d, mode->htotal);
+ regmap_write(priv->regmap, 0x0e, (hsynclen >> 8) << 3 |
+ (hbporch >> 8));
+ regmap_write(priv->regmap, 0x0f, hbporch);
+ regmap_write(priv->regmap, 0x10, hsynclen);
+
+ /* Vertical input timing. */
+ regmap_write(priv->regmap, 0x11, (mode->vtotal >> 8) << 3 |
+ (mode->vdisplay >> 8));
+ regmap_write(priv->regmap, 0x12, mode->vdisplay);
+ regmap_write(priv->regmap, 0x13, mode->vtotal);
+ regmap_write(priv->regmap, 0x14, ((vsynclen >> 8) << 3) |
+ (vbporch >> 8));
+ regmap_write(priv->regmap, 0x15, vbporch);
+ regmap_write(priv->regmap, 0x16, vsynclen);
+
+ /* Input color swap. */
+ regmap_update_bits(priv->regmap, 0x18, SWAP, BYTE_SWAP_BGR);
+
+ /* Input clock and sync polarity. */
+ regmap_update_bits(priv->regmap, 0x19, 0x1, mode->clock >> 16);
+ regmap_update_bits(priv->regmap, 0x19, HPO_I | VPO_I | GCLKFREQ,
+ (mode->flags & DRM_MODE_FLAG_PHSYNC) ? HPO_I : 0 |
+ (mode->flags & DRM_MODE_FLAG_PVSYNC) ? VPO_I : 0 |
+ mode->clock >> 16);
+ regmap_write(priv->regmap, 0x1a, mode->clock >> 8);
+ regmap_write(priv->regmap, 0x1b, mode->clock);
+
+ /* Horizontal output timing. */
+ regmap_write(priv->regmap, 0x1f, (mode->htotal >> 8) << 3 |
+ (mode->hdisplay >> 8));
+ regmap_write(priv->regmap, 0x20, mode->hdisplay);
+ regmap_write(priv->regmap, 0x21, mode->htotal);
+
+ /* Vertical output timing. */
+ regmap_write(priv->regmap, 0x25, (mode->vtotal >> 8) << 3 |
+ (mode->vdisplay >> 8));
+ regmap_write(priv->regmap, 0x26, mode->vdisplay);
+ regmap_write(priv->regmap, 0x27, mode->vtotal);
+
+ /* VGA channel bypass */
+ regmap_update_bits(priv->regmap, 0x2b, VFMT, 9);
+
+ /* Output sync polarity. */
+ regmap_update_bits(priv->regmap, 0x2e, HPO_O | VPO_O,
+ (mode->flags & DRM_MODE_FLAG_PHSYNC) ? HPO_O : 0 |
+ (mode->flags & DRM_MODE_FLAG_PVSYNC) ? VPO_O : 0);
+
+ /* HDMI horizontal output timing. */
+ regmap_update_bits(priv->regmap, 0x54, HWO_HDMI_HI | HOO_HDMI_HI,
+ (hsynclen >> 8) << 3 |
+ (hbporch >> 8));
+ regmap_write(priv->regmap, 0x55, hbporch);
+ regmap_write(priv->regmap, 0x56, hsynclen);
+
+ /* HDMI vertical output timing. */
+ regmap_update_bits(priv->regmap, 0x57, VWO_HDMI_HI | VOO_HDMI_HI,
+ (vsynclen >> 8) << 3 |
+ (vbporch >> 8));
+ regmap_write(priv->regmap, 0x58, vbporch);
+ regmap_write(priv->regmap, 0x59, vsynclen);
+
+ /* Pick HDMI, not LVDS. */
+ regmap_update_bits(priv->regmap, 0x7e, HDMI_LVDS_SEL, HDMI_LVDS_SEL);
+
+ /*
+ * Page 1
+ */
+ regmap_write(priv->regmap, 0x03, 0x01);
+
+ /* No idea what these do, but VGA is wobbly and blinky without them. */
+ regmap_update_bits(priv->regmap, 0x07, CKINV, CKINV);
+ regmap_update_bits(priv->regmap, 0x08, DISPON, DISPON);
+
+ /* DRI PLL */
+ regmap_update_bits(priv->regmap, 0x0c, DRI_PLL_DIVSEL, DRI_PLL_DIVSEL);
+ if (mode->clock <= 40000) {
+ regmap_update_bits(priv->regmap, 0x0c, DRI_PLL_N1_1 |
+ DRI_PLL_N1_0 |
+ DRI_PLL_N3_1 |
+ DRI_PLL_N3_0,
+ 0);
+ } else if (mode->clock < 80000) {
+ regmap_update_bits(priv->regmap, 0x0c, DRI_PLL_N1_1 |
+ DRI_PLL_N1_0 |
+ DRI_PLL_N3_1 |
+ DRI_PLL_N3_0,
+ DRI_PLL_N3_0 |
+ DRI_PLL_N1_0);
+ } else {
+ regmap_update_bits(priv->regmap, 0x0c, DRI_PLL_N1_1 |
+ DRI_PLL_N1_0 |
+ DRI_PLL_N3_1 |
+ DRI_PLL_N3_0,
+ DRI_PLL_N3_1 |
+ DRI_PLL_N1_1);
+ }
+
+ /* This seems to be color calibration for VGA. */
+ regmap_write(priv->regmap, 0x64, 0x29); /* LSB Blue */
+ regmap_write(priv->regmap, 0x65, 0x29); /* LSB Green */
+ regmap_write(priv->regmap, 0x66, 0x29); /* LSB Red */
+ regmap_write(priv->regmap, 0x67, 0x00); /* MSB Blue */
+ regmap_write(priv->regmap, 0x68, 0x00); /* MSB Green */
+ regmap_write(priv->regmap, 0x69, 0x00); /* MSB Red */
+
+ regmap_update_bits(priv->regmap, 0x6b, DRI_PD_SER, 0x00);
+ regmap_update_bits(priv->regmap, 0x6c, DRI_PLL_PD, 0x00);
+
+ /*
+ * Page 3
+ */
+ regmap_write(priv->regmap, 0x03, 0x03);
+
+ /* More bypasses and apparently another HDMI/LVDS selector. */
+ regmap_update_bits(priv->regmap, 0x28, VGACLK_BP | HM_LV_SEL,
+ VGACLK_BP | HM_LV_SEL);
+ regmap_update_bits(priv->regmap, 0x2a, HDMICLK_BP | HDMI_BP,
+ HDMICLK_BP | HDMI_BP);
+
+ /*
+ * Page 4
+ */
+ regmap_write(priv->regmap, 0x03, 0x04);
+
+ /* Output clock. */
+ regmap_write(priv->regmap, 0x10, mode->clock >> 16);
+ regmap_write(priv->regmap, 0x11, mode->clock >> 8);
+ regmap_write(priv->regmap, 0x12, mode->clock);
+}
+
+static const struct drm_bridge_funcs ch7033_bridge_funcs = {
+ .attach = ch7033_bridge_attach,
+ .detach = ch7033_bridge_detach,
+ .mode_valid = ch7033_bridge_mode_valid,
+ .disable = ch7033_bridge_disable,
+ .enable = ch7033_bridge_enable,
+ .mode_set = ch7033_bridge_mode_set,
+};
+
+static const struct regmap_config ch7033_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0x7f,
+};
+
+static int ch7033_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct ch7033_priv *priv;
+ unsigned int val;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, priv);
+
+ ret = drm_of_find_panel_or_bridge(dev->of_node, 1, -1, NULL,
+ &priv->next_bridge);
+ if (ret)
+ return ret;
+
+ priv->regmap = devm_regmap_init_i2c(client, &ch7033_regmap_config);
+ if (IS_ERR(priv->regmap)) {
+ dev_err(&client->dev, "regmap init failed\n");
+ return PTR_ERR(priv->regmap);
+ }
+
+ ret = regmap_read(priv->regmap, 0x00, &val);
+ if (ret < 0) {
+ dev_err(&client->dev, "error reading the model id: %d\n", ret);
+ return ret;
+ }
+ if ((val & 0xf7) != 0x56) {
+ dev_err(&client->dev, "the device is not a ch7033\n");
+ return -ENODEV;
+ }
+
+ regmap_write(priv->regmap, 0x03, 0x04);
+ ret = regmap_read(priv->regmap, 0x51, &val);
+ if (ret < 0) {
+ dev_err(&client->dev, "error reading the model id: %d\n", ret);
+ return ret;
+ }
+ if ((val & 0x0f) != 3) {
+ dev_err(&client->dev, "unknown revision %u\n", val);
+ return -ENODEV;
+ }
+
+ INIT_LIST_HEAD(&priv->bridge.list);
+ priv->bridge.funcs = &ch7033_bridge_funcs;
+ priv->bridge.of_node = dev->of_node;
+ drm_bridge_add(&priv->bridge);
+
+ dev_info(dev, "Chrontel CH7033 Video Encoder\n");
+ return 0;
+}
+
+static void ch7033_remove(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct ch7033_priv *priv = dev_get_drvdata(dev);
+
+ drm_bridge_remove(&priv->bridge);
+}
+
+static const struct of_device_id ch7033_dt_ids[] = {
+ { .compatible = "chrontel,ch7033", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ch7033_dt_ids);
+
+static const struct i2c_device_id ch7033_ids[] = {
+ { "ch7033", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ch7033_ids);
+
+static struct i2c_driver ch7033_driver = {
+ .probe = ch7033_probe,
+ .remove = ch7033_remove,
+ .driver = {
+ .name = "ch7033",
+ .of_match_table = of_match_ptr(ch7033_dt_ids),
+ },
+ .id_table = ch7033_ids,
+};
+
+module_i2c_driver(ch7033_driver);
+
+MODULE_AUTHOR("Lubomir Rintel <lkundrak@v3.sk>");
+MODULE_DESCRIPTION("Chrontel CH7033 Video Encoder Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/cros-ec-anx7688.c b/drivers/gpu/drm/bridge/cros-ec-anx7688.c
new file mode 100644
index 000000000..fa91bdedd
--- /dev/null
+++ b/drivers/gpu/drm/bridge/cros-ec-anx7688.c
@@ -0,0 +1,189 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * CrOS EC ANX7688 HDMI->DP bridge driver
+ *
+ * Copyright 2020 Google LLC
+ */
+
+#include <drm/drm_bridge.h>
+#include <drm/drm_print.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+
+/* Register addresses */
+#define ANX7688_VENDOR_ID_REG 0x00
+#define ANX7688_DEVICE_ID_REG 0x02
+
+#define ANX7688_FW_VERSION_REG 0x80
+
+#define ANX7688_DP_BANDWIDTH_REG 0x85
+#define ANX7688_DP_LANE_COUNT_REG 0x86
+
+#define ANX7688_VENDOR_ID 0x1f29
+#define ANX7688_DEVICE_ID 0x7688
+
+/* First supported firmware version (0.85) */
+#define ANX7688_MINIMUM_FW_VERSION 0x0085
+
+static const struct regmap_config cros_ec_anx7688_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+struct cros_ec_anx7688 {
+ struct i2c_client *client;
+ struct regmap *regmap;
+ struct drm_bridge bridge;
+ bool filter;
+};
+
+static inline struct cros_ec_anx7688 *
+bridge_to_cros_ec_anx7688(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct cros_ec_anx7688, bridge);
+}
+
+static bool cros_ec_anx7688_bridge_mode_fixup(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ struct cros_ec_anx7688 *anx = bridge_to_cros_ec_anx7688(bridge);
+ int totalbw, requiredbw;
+ u8 dpbw, lanecount;
+ u8 regs[2];
+ int ret;
+
+ if (!anx->filter)
+ return true;
+
+ /* Read both regs 0x85 (bandwidth) and 0x86 (lane count). */
+ ret = regmap_bulk_read(anx->regmap, ANX7688_DP_BANDWIDTH_REG, regs, 2);
+ if (ret < 0) {
+ DRM_ERROR("Failed to read bandwidth/lane count\n");
+ return false;
+ }
+ dpbw = regs[0];
+ lanecount = regs[1];
+
+ /* Maximum 0x19 bandwidth (6.75 Gbps Turbo mode), 2 lanes */
+ if (dpbw > 0x19 || lanecount > 2) {
+ DRM_ERROR("Invalid bandwidth/lane count (%02x/%d)\n", dpbw,
+ lanecount);
+ return false;
+ }
+
+ /* Compute available bandwidth (kHz) */
+ totalbw = dpbw * lanecount * 270000 * 8 / 10;
+
+ /* Required bandwidth (8 bpc, kHz) */
+ requiredbw = mode->clock * 8 * 3;
+
+ DRM_DEBUG_KMS("DP bandwidth: %d kHz (%02x/%d); mode requires %d Khz\n",
+ totalbw, dpbw, lanecount, requiredbw);
+
+ if (totalbw == 0) {
+ DRM_ERROR("Bandwidth/lane count are 0, not rejecting modes\n");
+ return true;
+ }
+
+ return totalbw >= requiredbw;
+}
+
+static const struct drm_bridge_funcs cros_ec_anx7688_bridge_funcs = {
+ .mode_fixup = cros_ec_anx7688_bridge_mode_fixup,
+};
+
+static int cros_ec_anx7688_bridge_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct cros_ec_anx7688 *anx7688;
+ u16 vendor, device, fw_version;
+ u8 buffer[4];
+ int ret;
+
+ anx7688 = devm_kzalloc(dev, sizeof(*anx7688), GFP_KERNEL);
+ if (!anx7688)
+ return -ENOMEM;
+
+ anx7688->client = client;
+ i2c_set_clientdata(client, anx7688);
+
+ anx7688->regmap = devm_regmap_init_i2c(client, &cros_ec_anx7688_regmap_config);
+ if (IS_ERR(anx7688->regmap)) {
+ ret = PTR_ERR(anx7688->regmap);
+ dev_err(dev, "regmap i2c init failed: %d\n", ret);
+ return ret;
+ }
+
+ /* Read both vendor and device id (4 bytes). */
+ ret = regmap_bulk_read(anx7688->regmap, ANX7688_VENDOR_ID_REG,
+ buffer, 4);
+ if (ret) {
+ dev_err(dev, "Failed to read chip vendor/device id\n");
+ return ret;
+ }
+
+ vendor = (u16)buffer[1] << 8 | buffer[0];
+ device = (u16)buffer[3] << 8 | buffer[2];
+ if (vendor != ANX7688_VENDOR_ID || device != ANX7688_DEVICE_ID) {
+ dev_err(dev, "Invalid vendor/device id %04x/%04x\n",
+ vendor, device);
+ return -ENODEV;
+ }
+
+ ret = regmap_bulk_read(anx7688->regmap, ANX7688_FW_VERSION_REG,
+ buffer, 2);
+ if (ret) {
+ dev_err(dev, "Failed to read firmware version\n");
+ return ret;
+ }
+
+ fw_version = (u16)buffer[0] << 8 | buffer[1];
+ dev_info(dev, "ANX7688 firmware version 0x%04x\n", fw_version);
+
+ anx7688->bridge.of_node = dev->of_node;
+
+ /* FW version >= 0.85 supports bandwidth/lane count registers */
+ if (fw_version >= ANX7688_MINIMUM_FW_VERSION)
+ anx7688->filter = true;
+ else
+ /* Warn, but not fail, for backwards compatibility */
+ DRM_WARN("Old ANX7688 FW version (0x%04x), not filtering\n",
+ fw_version);
+
+ anx7688->bridge.funcs = &cros_ec_anx7688_bridge_funcs;
+ drm_bridge_add(&anx7688->bridge);
+
+ return 0;
+}
+
+static void cros_ec_anx7688_bridge_remove(struct i2c_client *client)
+{
+ struct cros_ec_anx7688 *anx7688 = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&anx7688->bridge);
+}
+
+static const struct of_device_id cros_ec_anx7688_bridge_match_table[] = {
+ { .compatible = "google,cros-ec-anx7688" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, cros_ec_anx7688_bridge_match_table);
+
+static struct i2c_driver cros_ec_anx7688_bridge_driver = {
+ .probe_new = cros_ec_anx7688_bridge_probe,
+ .remove = cros_ec_anx7688_bridge_remove,
+ .driver = {
+ .name = "cros-ec-anx7688-bridge",
+ .of_match_table = cros_ec_anx7688_bridge_match_table,
+ },
+};
+
+module_i2c_driver(cros_ec_anx7688_bridge_driver);
+
+MODULE_DESCRIPTION("ChromeOS EC ANX7688 HDMI->DP bridge driver");
+MODULE_AUTHOR("Nicolas Boichat <drinkcat@chromium.org>");
+MODULE_AUTHOR("Enric Balletbo i Serra <enric.balletbo@collabora.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/bridge/display-connector.c b/drivers/gpu/drm/bridge/display-connector.c
new file mode 100644
index 000000000..9a12449ad
--- /dev/null
+++ b/drivers/gpu/drm/bridge/display-connector.c
@@ -0,0 +1,439 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_edid.h>
+
+struct display_connector {
+ struct drm_bridge bridge;
+
+ struct gpio_desc *hpd_gpio;
+ int hpd_irq;
+
+ struct regulator *dp_pwr;
+ struct gpio_desc *ddc_en;
+};
+
+static inline struct display_connector *
+to_display_connector(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct display_connector, bridge);
+}
+
+static int display_connector_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ return flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR ? 0 : -EINVAL;
+}
+
+static enum drm_connector_status
+display_connector_detect(struct drm_bridge *bridge)
+{
+ struct display_connector *conn = to_display_connector(bridge);
+
+ if (conn->hpd_gpio) {
+ if (gpiod_get_value_cansleep(conn->hpd_gpio))
+ return connector_status_connected;
+ else
+ return connector_status_disconnected;
+ }
+
+ if (conn->bridge.ddc && drm_probe_ddc(conn->bridge.ddc))
+ return connector_status_connected;
+
+ switch (conn->bridge.type) {
+ case DRM_MODE_CONNECTOR_DVIA:
+ case DRM_MODE_CONNECTOR_DVID:
+ case DRM_MODE_CONNECTOR_DVII:
+ case DRM_MODE_CONNECTOR_HDMIA:
+ case DRM_MODE_CONNECTOR_HDMIB:
+ /*
+ * For DVI and HDMI connectors a DDC probe failure indicates
+ * that no cable is connected.
+ */
+ return connector_status_disconnected;
+
+ case DRM_MODE_CONNECTOR_Composite:
+ case DRM_MODE_CONNECTOR_SVIDEO:
+ case DRM_MODE_CONNECTOR_VGA:
+ default:
+ /*
+ * Composite and S-Video connectors have no other detection
+ * mean than the HPD GPIO. For VGA connectors, even if we have
+ * an I2C bus, we can't assume that the cable is disconnected
+ * if drm_probe_ddc fails, as some cables don't wire the DDC
+ * pins.
+ */
+ return connector_status_unknown;
+ }
+}
+
+static struct edid *display_connector_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct display_connector *conn = to_display_connector(bridge);
+
+ return drm_get_edid(connector, conn->bridge.ddc);
+}
+
+/*
+ * Since this bridge is tied to the connector, it acts like a passthrough,
+ * so concerning the output bus formats, either pass the bus formats from the
+ * previous bridge or return fallback data like done in the bridge function:
+ * drm_atomic_bridge_chain_select_bus_fmts().
+ * This supports negotiation if the bridge chain has all bits in place.
+ */
+static u32 *display_connector_get_output_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ unsigned int *num_output_fmts)
+{
+ struct drm_bridge *prev_bridge = drm_bridge_get_prev_bridge(bridge);
+ struct drm_bridge_state *prev_bridge_state;
+
+ if (!prev_bridge || !prev_bridge->funcs->atomic_get_output_bus_fmts) {
+ struct drm_connector *conn = conn_state->connector;
+ u32 *out_bus_fmts;
+
+ *num_output_fmts = 1;
+ out_bus_fmts = kmalloc(sizeof(*out_bus_fmts), GFP_KERNEL);
+ if (!out_bus_fmts)
+ return NULL;
+
+ if (conn->display_info.num_bus_formats &&
+ conn->display_info.bus_formats)
+ out_bus_fmts[0] = conn->display_info.bus_formats[0];
+ else
+ out_bus_fmts[0] = MEDIA_BUS_FMT_FIXED;
+
+ return out_bus_fmts;
+ }
+
+ prev_bridge_state = drm_atomic_get_new_bridge_state(crtc_state->state,
+ prev_bridge);
+
+ return prev_bridge->funcs->atomic_get_output_bus_fmts(prev_bridge, prev_bridge_state,
+ crtc_state, conn_state,
+ num_output_fmts);
+}
+
+/*
+ * Since this bridge is tied to the connector, it acts like a passthrough,
+ * so concerning the input bus formats, either pass the bus formats from the
+ * previous bridge or MEDIA_BUS_FMT_FIXED (like select_bus_fmt_recursive())
+ * when atomic_get_input_bus_fmts is not supported.
+ * This supports negotiation if the bridge chain has all bits in place.
+ */
+static u32 *display_connector_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ struct drm_bridge *prev_bridge = drm_bridge_get_prev_bridge(bridge);
+ struct drm_bridge_state *prev_bridge_state;
+
+ if (!prev_bridge || !prev_bridge->funcs->atomic_get_input_bus_fmts) {
+ u32 *in_bus_fmts;
+
+ *num_input_fmts = 1;
+ in_bus_fmts = kmalloc(sizeof(*in_bus_fmts), GFP_KERNEL);
+ if (!in_bus_fmts)
+ return NULL;
+
+ in_bus_fmts[0] = MEDIA_BUS_FMT_FIXED;
+
+ return in_bus_fmts;
+ }
+
+ prev_bridge_state = drm_atomic_get_new_bridge_state(crtc_state->state,
+ prev_bridge);
+
+ return prev_bridge->funcs->atomic_get_input_bus_fmts(prev_bridge, prev_bridge_state,
+ crtc_state, conn_state, output_fmt,
+ num_input_fmts);
+}
+
+static const struct drm_bridge_funcs display_connector_bridge_funcs = {
+ .attach = display_connector_attach,
+ .detect = display_connector_detect,
+ .get_edid = display_connector_get_edid,
+ .atomic_get_output_bus_fmts = display_connector_get_output_bus_fmts,
+ .atomic_get_input_bus_fmts = display_connector_get_input_bus_fmts,
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+};
+
+static irqreturn_t display_connector_hpd_irq(int irq, void *arg)
+{
+ struct display_connector *conn = arg;
+ struct drm_bridge *bridge = &conn->bridge;
+
+ drm_bridge_hpd_notify(bridge, display_connector_detect(bridge));
+
+ return IRQ_HANDLED;
+}
+
+static int display_connector_probe(struct platform_device *pdev)
+{
+ struct display_connector *conn;
+ unsigned int type;
+ const char *label = NULL;
+ int ret;
+
+ conn = devm_kzalloc(&pdev->dev, sizeof(*conn), GFP_KERNEL);
+ if (!conn)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, conn);
+
+ type = (uintptr_t)of_device_get_match_data(&pdev->dev);
+
+ /* Get the exact connector type. */
+ switch (type) {
+ case DRM_MODE_CONNECTOR_DVII: {
+ bool analog, digital;
+
+ analog = of_property_read_bool(pdev->dev.of_node, "analog");
+ digital = of_property_read_bool(pdev->dev.of_node, "digital");
+ if (analog && !digital) {
+ conn->bridge.type = DRM_MODE_CONNECTOR_DVIA;
+ } else if (!analog && digital) {
+ conn->bridge.type = DRM_MODE_CONNECTOR_DVID;
+ } else if (analog && digital) {
+ conn->bridge.type = DRM_MODE_CONNECTOR_DVII;
+ } else {
+ dev_err(&pdev->dev, "DVI connector with no type\n");
+ return -EINVAL;
+ }
+ break;
+ }
+
+ case DRM_MODE_CONNECTOR_HDMIA: {
+ const char *hdmi_type;
+
+ ret = of_property_read_string(pdev->dev.of_node, "type",
+ &hdmi_type);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "HDMI connector with no type\n");
+ return -EINVAL;
+ }
+
+ if (!strcmp(hdmi_type, "a") || !strcmp(hdmi_type, "c") ||
+ !strcmp(hdmi_type, "d") || !strcmp(hdmi_type, "e")) {
+ conn->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
+ } else if (!strcmp(hdmi_type, "b")) {
+ conn->bridge.type = DRM_MODE_CONNECTOR_HDMIB;
+ } else {
+ dev_err(&pdev->dev,
+ "Unsupported HDMI connector type '%s'\n",
+ hdmi_type);
+ return -EINVAL;
+ }
+
+ break;
+ }
+
+ default:
+ conn->bridge.type = type;
+ break;
+ }
+
+ /* All the supported connector types support interlaced modes. */
+ conn->bridge.interlace_allowed = true;
+
+ /* Get the optional connector label. */
+ of_property_read_string(pdev->dev.of_node, "label", &label);
+
+ /*
+ * Get the HPD GPIO for DVI, HDMI and DP connectors. If the GPIO can provide
+ * edge interrupts, register an interrupt handler.
+ */
+ if (type == DRM_MODE_CONNECTOR_DVII ||
+ type == DRM_MODE_CONNECTOR_HDMIA ||
+ type == DRM_MODE_CONNECTOR_DisplayPort) {
+ conn->hpd_gpio = devm_gpiod_get_optional(&pdev->dev, "hpd",
+ GPIOD_IN);
+ if (IS_ERR(conn->hpd_gpio)) {
+ if (PTR_ERR(conn->hpd_gpio) != -EPROBE_DEFER)
+ dev_err(&pdev->dev,
+ "Unable to retrieve HPD GPIO\n");
+ return PTR_ERR(conn->hpd_gpio);
+ }
+
+ conn->hpd_irq = gpiod_to_irq(conn->hpd_gpio);
+ } else {
+ conn->hpd_irq = -EINVAL;
+ }
+
+ if (conn->hpd_irq >= 0) {
+ ret = devm_request_threaded_irq(&pdev->dev, conn->hpd_irq,
+ NULL, display_connector_hpd_irq,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "HPD", conn);
+ if (ret) {
+ dev_info(&pdev->dev,
+ "Failed to request HPD edge interrupt, falling back to polling\n");
+ conn->hpd_irq = -EINVAL;
+ }
+ }
+
+ /* Retrieve the DDC I2C adapter for DVI, HDMI and VGA connectors. */
+ if (type == DRM_MODE_CONNECTOR_DVII ||
+ type == DRM_MODE_CONNECTOR_HDMIA ||
+ type == DRM_MODE_CONNECTOR_VGA) {
+ struct device_node *phandle;
+
+ phandle = of_parse_phandle(pdev->dev.of_node, "ddc-i2c-bus", 0);
+ if (phandle) {
+ conn->bridge.ddc = of_get_i2c_adapter_by_node(phandle);
+ of_node_put(phandle);
+ if (!conn->bridge.ddc)
+ return -EPROBE_DEFER;
+ } else {
+ dev_dbg(&pdev->dev,
+ "No I2C bus specified, disabling EDID readout\n");
+ }
+ }
+
+ /* Get the DP PWR for DP connector. */
+ if (type == DRM_MODE_CONNECTOR_DisplayPort) {
+ int ret;
+
+ conn->dp_pwr = devm_regulator_get_optional(&pdev->dev, "dp-pwr");
+
+ if (IS_ERR(conn->dp_pwr)) {
+ ret = PTR_ERR(conn->dp_pwr);
+
+ switch (ret) {
+ case -ENODEV:
+ conn->dp_pwr = NULL;
+ break;
+
+ case -EPROBE_DEFER:
+ return -EPROBE_DEFER;
+
+ default:
+ dev_err(&pdev->dev, "failed to get DP PWR regulator: %d\n", ret);
+ return ret;
+ }
+ }
+
+ if (conn->dp_pwr) {
+ ret = regulator_enable(conn->dp_pwr);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to enable DP PWR regulator: %d\n", ret);
+ return ret;
+ }
+ }
+ }
+
+ /* enable DDC */
+ if (type == DRM_MODE_CONNECTOR_HDMIA) {
+ conn->ddc_en = devm_gpiod_get_optional(&pdev->dev, "ddc-en",
+ GPIOD_OUT_HIGH);
+
+ if (IS_ERR(conn->ddc_en)) {
+ dev_err(&pdev->dev, "Couldn't get ddc-en gpio\n");
+ return PTR_ERR(conn->ddc_en);
+ }
+ }
+
+ conn->bridge.funcs = &display_connector_bridge_funcs;
+ conn->bridge.of_node = pdev->dev.of_node;
+
+ if (conn->bridge.ddc)
+ conn->bridge.ops |= DRM_BRIDGE_OP_EDID
+ | DRM_BRIDGE_OP_DETECT;
+ if (conn->hpd_gpio)
+ conn->bridge.ops |= DRM_BRIDGE_OP_DETECT;
+ if (conn->hpd_irq >= 0)
+ conn->bridge.ops |= DRM_BRIDGE_OP_HPD;
+
+ dev_dbg(&pdev->dev,
+ "Found %s display connector '%s' %s DDC bus and %s HPD GPIO (ops 0x%x)\n",
+ drm_get_connector_type_name(conn->bridge.type),
+ label ? label : "<unlabelled>",
+ conn->bridge.ddc ? "with" : "without",
+ conn->hpd_gpio ? "with" : "without",
+ conn->bridge.ops);
+
+ drm_bridge_add(&conn->bridge);
+
+ return 0;
+}
+
+static int display_connector_remove(struct platform_device *pdev)
+{
+ struct display_connector *conn = platform_get_drvdata(pdev);
+
+ if (conn->ddc_en)
+ gpiod_set_value(conn->ddc_en, 0);
+
+ if (conn->dp_pwr)
+ regulator_disable(conn->dp_pwr);
+
+ drm_bridge_remove(&conn->bridge);
+
+ if (!IS_ERR(conn->bridge.ddc))
+ i2c_put_adapter(conn->bridge.ddc);
+
+ return 0;
+}
+
+static const struct of_device_id display_connector_match[] = {
+ {
+ .compatible = "composite-video-connector",
+ .data = (void *)DRM_MODE_CONNECTOR_Composite,
+ }, {
+ .compatible = "dvi-connector",
+ .data = (void *)DRM_MODE_CONNECTOR_DVII,
+ }, {
+ .compatible = "hdmi-connector",
+ .data = (void *)DRM_MODE_CONNECTOR_HDMIA,
+ }, {
+ .compatible = "svideo-connector",
+ .data = (void *)DRM_MODE_CONNECTOR_SVIDEO,
+ }, {
+ .compatible = "vga-connector",
+ .data = (void *)DRM_MODE_CONNECTOR_VGA,
+ }, {
+ .compatible = "dp-connector",
+ .data = (void *)DRM_MODE_CONNECTOR_DisplayPort,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, display_connector_match);
+
+static struct platform_driver display_connector_driver = {
+ .probe = display_connector_probe,
+ .remove = display_connector_remove,
+ .driver = {
+ .name = "display-connector",
+ .of_match_table = display_connector_match,
+ },
+};
+module_platform_driver(display_connector_driver);
+
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
+MODULE_DESCRIPTION("Display connector driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/bridge/fsl-ldb.c b/drivers/gpu/drm/bridge/fsl-ldb.c
new file mode 100644
index 000000000..f9e0f8d99
--- /dev/null
+++ b/drivers/gpu/drm/bridge/fsl-ldb.c
@@ -0,0 +1,326 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2022 Marek Vasut <marex@denx.de>
+ */
+
+#include <linux/clk.h>
+#include <linux/media-bus-format.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+
+#define LDB_CTRL 0x5c
+#define LDB_CTRL_CH0_ENABLE BIT(0)
+#define LDB_CTRL_CH0_DI_SELECT BIT(1)
+#define LDB_CTRL_CH1_ENABLE BIT(2)
+#define LDB_CTRL_CH1_DI_SELECT BIT(3)
+#define LDB_CTRL_SPLIT_MODE BIT(4)
+#define LDB_CTRL_CH0_DATA_WIDTH BIT(5)
+#define LDB_CTRL_CH0_BIT_MAPPING BIT(6)
+#define LDB_CTRL_CH1_DATA_WIDTH BIT(7)
+#define LDB_CTRL_CH1_BIT_MAPPING BIT(8)
+#define LDB_CTRL_DI0_VSYNC_POLARITY BIT(9)
+#define LDB_CTRL_DI1_VSYNC_POLARITY BIT(10)
+#define LDB_CTRL_REG_CH0_FIFO_RESET BIT(11)
+#define LDB_CTRL_REG_CH1_FIFO_RESET BIT(12)
+#define LDB_CTRL_ASYNC_FIFO_ENABLE BIT(24)
+#define LDB_CTRL_ASYNC_FIFO_THRESHOLD_MASK GENMASK(27, 25)
+
+#define LVDS_CTRL 0x128
+#define LVDS_CTRL_CH0_EN BIT(0)
+#define LVDS_CTRL_CH1_EN BIT(1)
+#define LVDS_CTRL_VBG_EN BIT(2)
+#define LVDS_CTRL_HS_EN BIT(3)
+#define LVDS_CTRL_PRE_EMPH_EN BIT(4)
+#define LVDS_CTRL_PRE_EMPH_ADJ(n) (((n) & 0x7) << 5)
+#define LVDS_CTRL_PRE_EMPH_ADJ_MASK GENMASK(7, 5)
+#define LVDS_CTRL_CM_ADJ(n) (((n) & 0x7) << 8)
+#define LVDS_CTRL_CM_ADJ_MASK GENMASK(10, 8)
+#define LVDS_CTRL_CC_ADJ(n) (((n) & 0x7) << 11)
+#define LVDS_CTRL_CC_ADJ_MASK GENMASK(13, 11)
+#define LVDS_CTRL_SLEW_ADJ(n) (((n) & 0x7) << 14)
+#define LVDS_CTRL_SLEW_ADJ_MASK GENMASK(16, 14)
+#define LVDS_CTRL_VBG_ADJ(n) (((n) & 0x7) << 17)
+#define LVDS_CTRL_VBG_ADJ_MASK GENMASK(19, 17)
+
+struct fsl_ldb {
+ struct device *dev;
+ struct drm_bridge bridge;
+ struct drm_bridge *panel_bridge;
+ struct clk *clk;
+ struct regmap *regmap;
+ bool lvds_dual_link;
+};
+
+static inline struct fsl_ldb *to_fsl_ldb(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct fsl_ldb, bridge);
+}
+
+static int fsl_ldb_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct fsl_ldb *fsl_ldb = to_fsl_ldb(bridge);
+
+ return drm_bridge_attach(bridge->encoder, fsl_ldb->panel_bridge,
+ bridge, flags);
+}
+
+static void fsl_ldb_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct fsl_ldb *fsl_ldb = to_fsl_ldb(bridge);
+ struct drm_atomic_state *state = old_bridge_state->base.state;
+ const struct drm_bridge_state *bridge_state;
+ const struct drm_crtc_state *crtc_state;
+ const struct drm_display_mode *mode;
+ struct drm_connector *connector;
+ struct drm_crtc *crtc;
+ bool lvds_format_24bpp;
+ bool lvds_format_jeida;
+ u32 reg;
+
+ /* Get the LVDS format from the bridge state. */
+ bridge_state = drm_atomic_get_new_bridge_state(state, bridge);
+
+ switch (bridge_state->output_bus_cfg.format) {
+ case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
+ lvds_format_24bpp = false;
+ lvds_format_jeida = true;
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
+ lvds_format_24bpp = true;
+ lvds_format_jeida = true;
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
+ lvds_format_24bpp = true;
+ lvds_format_jeida = false;
+ break;
+ default:
+ /*
+ * Some bridges still don't set the correct LVDS bus pixel
+ * format, use SPWG24 default format until those are fixed.
+ */
+ lvds_format_24bpp = true;
+ lvds_format_jeida = false;
+ dev_warn(fsl_ldb->dev,
+ "Unsupported LVDS bus format 0x%04x, please check output bridge driver. Falling back to SPWG24.\n",
+ bridge_state->output_bus_cfg.format);
+ break;
+ }
+
+ /*
+ * Retrieve the CRTC adjusted mode. This requires a little dance to go
+ * from the bridge to the encoder, to the connector and to the CRTC.
+ */
+ connector = drm_atomic_get_new_connector_for_encoder(state,
+ bridge->encoder);
+ crtc = drm_atomic_get_new_connector_state(state, connector)->crtc;
+ crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+ mode = &crtc_state->adjusted_mode;
+
+ if (fsl_ldb->lvds_dual_link)
+ clk_set_rate(fsl_ldb->clk, mode->clock * 3500);
+ else
+ clk_set_rate(fsl_ldb->clk, mode->clock * 7000);
+ clk_prepare_enable(fsl_ldb->clk);
+
+ /* Program LDB_CTRL */
+ reg = LDB_CTRL_CH0_ENABLE;
+
+ if (fsl_ldb->lvds_dual_link)
+ reg |= LDB_CTRL_CH1_ENABLE | LDB_CTRL_SPLIT_MODE;
+
+ if (lvds_format_24bpp) {
+ reg |= LDB_CTRL_CH0_DATA_WIDTH;
+ if (fsl_ldb->lvds_dual_link)
+ reg |= LDB_CTRL_CH1_DATA_WIDTH;
+ }
+
+ if (lvds_format_jeida) {
+ reg |= LDB_CTRL_CH0_BIT_MAPPING;
+ if (fsl_ldb->lvds_dual_link)
+ reg |= LDB_CTRL_CH1_BIT_MAPPING;
+ }
+
+ if (mode->flags & DRM_MODE_FLAG_PVSYNC) {
+ reg |= LDB_CTRL_DI0_VSYNC_POLARITY;
+ if (fsl_ldb->lvds_dual_link)
+ reg |= LDB_CTRL_DI1_VSYNC_POLARITY;
+ }
+
+ regmap_write(fsl_ldb->regmap, LDB_CTRL, reg);
+
+ /* Program LVDS_CTRL */
+ reg = LVDS_CTRL_CC_ADJ(2) | LVDS_CTRL_PRE_EMPH_EN |
+ LVDS_CTRL_PRE_EMPH_ADJ(3) | LVDS_CTRL_VBG_EN;
+ regmap_write(fsl_ldb->regmap, LVDS_CTRL, reg);
+
+ /* Wait for VBG to stabilize. */
+ usleep_range(15, 20);
+
+ reg |= LVDS_CTRL_CH0_EN;
+ if (fsl_ldb->lvds_dual_link)
+ reg |= LVDS_CTRL_CH1_EN;
+
+ regmap_write(fsl_ldb->regmap, LVDS_CTRL, reg);
+}
+
+static void fsl_ldb_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct fsl_ldb *fsl_ldb = to_fsl_ldb(bridge);
+
+ /* Stop both channels. */
+ regmap_write(fsl_ldb->regmap, LVDS_CTRL, 0);
+ regmap_write(fsl_ldb->regmap, LDB_CTRL, 0);
+
+ clk_disable_unprepare(fsl_ldb->clk);
+}
+
+#define MAX_INPUT_SEL_FORMATS 1
+static u32 *
+fsl_ldb_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ u32 *input_fmts;
+
+ *num_input_fmts = 0;
+
+ input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
+ GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
+ *num_input_fmts = MAX_INPUT_SEL_FORMATS;
+
+ return input_fmts;
+}
+
+static enum drm_mode_status
+fsl_ldb_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct fsl_ldb *fsl_ldb = to_fsl_ldb(bridge);
+
+ if (mode->clock > (fsl_ldb->lvds_dual_link ? 160000 : 80000))
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
+}
+
+static const struct drm_bridge_funcs funcs = {
+ .attach = fsl_ldb_attach,
+ .atomic_enable = fsl_ldb_atomic_enable,
+ .atomic_disable = fsl_ldb_atomic_disable,
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_get_input_bus_fmts = fsl_ldb_atomic_get_input_bus_fmts,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .mode_valid = fsl_ldb_mode_valid,
+};
+
+static int fsl_ldb_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *panel_node;
+ struct device_node *port1, *port2;
+ struct drm_panel *panel;
+ struct fsl_ldb *fsl_ldb;
+ int dual_link;
+
+ fsl_ldb = devm_kzalloc(dev, sizeof(*fsl_ldb), GFP_KERNEL);
+ if (!fsl_ldb)
+ return -ENOMEM;
+
+ fsl_ldb->dev = &pdev->dev;
+ fsl_ldb->bridge.funcs = &funcs;
+ fsl_ldb->bridge.of_node = dev->of_node;
+
+ fsl_ldb->clk = devm_clk_get(dev, "ldb");
+ if (IS_ERR(fsl_ldb->clk))
+ return PTR_ERR(fsl_ldb->clk);
+
+ fsl_ldb->regmap = syscon_node_to_regmap(dev->of_node->parent);
+ if (IS_ERR(fsl_ldb->regmap))
+ return PTR_ERR(fsl_ldb->regmap);
+
+ /* Locate the panel DT node. */
+ panel_node = of_graph_get_remote_node(dev->of_node, 1, 0);
+ if (!panel_node)
+ return -ENXIO;
+
+ panel = of_drm_find_panel(panel_node);
+ of_node_put(panel_node);
+ if (IS_ERR(panel))
+ return PTR_ERR(panel);
+
+ fsl_ldb->panel_bridge = devm_drm_panel_bridge_add(dev, panel);
+ if (IS_ERR(fsl_ldb->panel_bridge))
+ return PTR_ERR(fsl_ldb->panel_bridge);
+
+ /* Determine whether this is dual-link configuration */
+ port1 = of_graph_get_port_by_id(dev->of_node, 1);
+ port2 = of_graph_get_port_by_id(dev->of_node, 2);
+ dual_link = drm_of_lvds_get_dual_link_pixel_order(port1, port2);
+ of_node_put(port1);
+ of_node_put(port2);
+
+ if (dual_link == DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS) {
+ dev_err(dev, "LVDS channel pixel swap not supported.\n");
+ return -EINVAL;
+ }
+
+ if (dual_link == DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS)
+ fsl_ldb->lvds_dual_link = true;
+
+ platform_set_drvdata(pdev, fsl_ldb);
+
+ drm_bridge_add(&fsl_ldb->bridge);
+
+ return 0;
+}
+
+static int fsl_ldb_remove(struct platform_device *pdev)
+{
+ struct fsl_ldb *fsl_ldb = platform_get_drvdata(pdev);
+
+ drm_bridge_remove(&fsl_ldb->bridge);
+
+ return 0;
+}
+
+static const struct of_device_id fsl_ldb_match[] = {
+ { .compatible = "fsl,imx8mp-ldb", },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, fsl_ldb_match);
+
+static struct platform_driver fsl_ldb_driver = {
+ .probe = fsl_ldb_probe,
+ .remove = fsl_ldb_remove,
+ .driver = {
+ .name = "fsl-ldb",
+ .of_match_table = fsl_ldb_match,
+ },
+};
+module_platform_driver(fsl_ldb_driver);
+
+MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
+MODULE_DESCRIPTION("Freescale i.MX8MP LDB");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/bridge/imx/Kconfig b/drivers/gpu/drm/bridge/imx/Kconfig
new file mode 100644
index 000000000..608f47f41
--- /dev/null
+++ b/drivers/gpu/drm/bridge/imx/Kconfig
@@ -0,0 +1,47 @@
+if ARCH_MXC || COMPILE_TEST
+
+config DRM_IMX8QM_LDB
+ tristate "Freescale i.MX8QM LVDS display bridge"
+ depends on OF
+ depends on COMMON_CLK
+ select DRM_KMS_HELPER
+ help
+ Choose this to enable the internal LVDS Display Bridge(LDB) found in
+ Freescale i.MX8qm processor. Official name of LDB is pixel mapper.
+
+config DRM_IMX8QXP_LDB
+ tristate "Freescale i.MX8QXP LVDS display bridge"
+ depends on OF
+ depends on COMMON_CLK
+ select DRM_KMS_HELPER
+ help
+ Choose this to enable the internal LVDS Display Bridge(LDB) found in
+ Freescale i.MX8qxp processor. Official name of LDB is pixel mapper.
+
+config DRM_IMX8QXP_PIXEL_COMBINER
+ tristate "Freescale i.MX8QM/QXP pixel combiner"
+ depends on OF
+ depends on COMMON_CLK
+ select DRM_KMS_HELPER
+ help
+ Choose this to enable pixel combiner found in
+ Freescale i.MX8qm/qxp processors.
+
+config DRM_IMX8QXP_PIXEL_LINK
+ tristate "Freescale i.MX8QM/QXP display pixel link"
+ depends on OF
+ depends on IMX_SCU
+ select DRM_KMS_HELPER
+ help
+ Choose this to enable display pixel link found in
+ Freescale i.MX8qm/qxp processors.
+
+config DRM_IMX8QXP_PIXEL_LINK_TO_DPI
+ tristate "Freescale i.MX8QXP pixel link to display pixel interface"
+ depends on OF
+ select DRM_KMS_HELPER
+ help
+ Choose this to enable pixel link to display pixel interface(PXL2DPI)
+ found in Freescale i.MX8qxp processor.
+
+endif # ARCH_MXC || COMPILE_TEST
diff --git a/drivers/gpu/drm/bridge/imx/Makefile b/drivers/gpu/drm/bridge/imx/Makefile
new file mode 100644
index 000000000..aa90ec8d5
--- /dev/null
+++ b/drivers/gpu/drm/bridge/imx/Makefile
@@ -0,0 +1,9 @@
+imx8qm-ldb-objs := imx-ldb-helper.o imx8qm-ldb-drv.o
+obj-$(CONFIG_DRM_IMX8QM_LDB) += imx8qm-ldb.o
+
+imx8qxp-ldb-objs := imx-ldb-helper.o imx8qxp-ldb-drv.o
+obj-$(CONFIG_DRM_IMX8QXP_LDB) += imx8qxp-ldb.o
+
+obj-$(CONFIG_DRM_IMX8QXP_PIXEL_COMBINER) += imx8qxp-pixel-combiner.o
+obj-$(CONFIG_DRM_IMX8QXP_PIXEL_LINK) += imx8qxp-pixel-link.o
+obj-$(CONFIG_DRM_IMX8QXP_PIXEL_LINK_TO_DPI) += imx8qxp-pxl2dpi.o
diff --git a/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c
new file mode 100644
index 000000000..7338b84bc
--- /dev/null
+++ b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c
@@ -0,0 +1,221 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2012 Sascha Hauer, Pengutronix
+ * Copyright 2019,2020,2022 NXP
+ */
+
+#include <linux/media-bus-format.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#include <drm/drm_bridge.h>
+#include <drm/drm_of.h>
+#include <drm/drm_print.h>
+
+#include "imx-ldb-helper.h"
+
+bool ldb_channel_is_single_link(struct ldb_channel *ldb_ch)
+{
+ return ldb_ch->link_type == LDB_CH_SINGLE_LINK;
+}
+
+bool ldb_channel_is_split_link(struct ldb_channel *ldb_ch)
+{
+ return ldb_ch->link_type == LDB_CH_DUAL_LINK_EVEN_ODD_PIXELS ||
+ ldb_ch->link_type == LDB_CH_DUAL_LINK_ODD_EVEN_PIXELS;
+}
+
+int ldb_bridge_atomic_check_helper(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct ldb_channel *ldb_ch = bridge->driver_private;
+
+ ldb_ch->in_bus_format = bridge_state->input_bus_cfg.format;
+ ldb_ch->out_bus_format = bridge_state->output_bus_cfg.format;
+
+ return 0;
+}
+
+void ldb_bridge_mode_set_helper(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ struct ldb_channel *ldb_ch = bridge->driver_private;
+ struct ldb *ldb = ldb_ch->ldb;
+ bool is_split = ldb_channel_is_split_link(ldb_ch);
+
+ if (is_split)
+ ldb->ldb_ctrl |= LDB_SPLIT_MODE_EN;
+
+ switch (ldb_ch->out_bus_format) {
+ case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
+ if (ldb_ch->chno == 0 || is_split)
+ ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24;
+ if (ldb_ch->chno == 1 || is_split)
+ ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24;
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
+ if (ldb_ch->chno == 0 || is_split)
+ ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24 |
+ LDB_BIT_MAP_CH0_JEIDA;
+ if (ldb_ch->chno == 1 || is_split)
+ ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24 |
+ LDB_BIT_MAP_CH1_JEIDA;
+ break;
+ }
+}
+
+void ldb_bridge_enable_helper(struct drm_bridge *bridge)
+{
+ struct ldb_channel *ldb_ch = bridge->driver_private;
+ struct ldb *ldb = ldb_ch->ldb;
+
+ /*
+ * Platform specific bridge drivers should set ldb_ctrl properly
+ * for the enablement, so just write the ctrl_reg here.
+ */
+ regmap_write(ldb->regmap, ldb->ctrl_reg, ldb->ldb_ctrl);
+}
+
+void ldb_bridge_disable_helper(struct drm_bridge *bridge)
+{
+ struct ldb_channel *ldb_ch = bridge->driver_private;
+ struct ldb *ldb = ldb_ch->ldb;
+ bool is_split = ldb_channel_is_split_link(ldb_ch);
+
+ if (ldb_ch->chno == 0 || is_split)
+ ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK;
+ if (ldb_ch->chno == 1 || is_split)
+ ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK;
+
+ regmap_write(ldb->regmap, ldb->ctrl_reg, ldb->ldb_ctrl);
+}
+
+int ldb_bridge_attach_helper(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct ldb_channel *ldb_ch = bridge->driver_private;
+ struct ldb *ldb = ldb_ch->ldb;
+
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+ DRM_DEV_ERROR(ldb->dev,
+ "do not support creating a drm_connector\n");
+ return -EINVAL;
+ }
+
+ if (!bridge->encoder) {
+ DRM_DEV_ERROR(ldb->dev, "missing encoder\n");
+ return -ENODEV;
+ }
+
+ return drm_bridge_attach(bridge->encoder,
+ ldb_ch->next_bridge, bridge,
+ DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+}
+
+int ldb_init_helper(struct ldb *ldb)
+{
+ struct device *dev = ldb->dev;
+ struct device_node *np = dev->of_node;
+ struct device_node *child;
+ int ret;
+ u32 i;
+
+ ldb->regmap = syscon_node_to_regmap(np->parent);
+ if (IS_ERR(ldb->regmap)) {
+ ret = PTR_ERR(ldb->regmap);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev, "failed to get regmap: %d\n", ret);
+ return ret;
+ }
+
+ for_each_available_child_of_node(np, child) {
+ struct ldb_channel *ldb_ch;
+
+ ret = of_property_read_u32(child, "reg", &i);
+ if (ret || i > MAX_LDB_CHAN_NUM - 1) {
+ ret = -EINVAL;
+ DRM_DEV_ERROR(dev,
+ "invalid channel node address: %u\n", i);
+ of_node_put(child);
+ return ret;
+ }
+
+ ldb_ch = ldb->channel[i];
+ ldb_ch->ldb = ldb;
+ ldb_ch->chno = i;
+ ldb_ch->is_available = true;
+ ldb_ch->np = child;
+
+ ldb->available_ch_cnt++;
+ }
+
+ return 0;
+}
+
+int ldb_find_next_bridge_helper(struct ldb *ldb)
+{
+ struct device *dev = ldb->dev;
+ struct ldb_channel *ldb_ch;
+ int ret, i;
+
+ for (i = 0; i < MAX_LDB_CHAN_NUM; i++) {
+ ldb_ch = ldb->channel[i];
+
+ if (!ldb_ch->is_available)
+ continue;
+
+ ldb_ch->next_bridge = devm_drm_of_get_bridge(dev, ldb_ch->np,
+ 1, 0);
+ if (IS_ERR(ldb_ch->next_bridge)) {
+ ret = PTR_ERR(ldb_ch->next_bridge);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev,
+ "failed to get next bridge: %d\n",
+ ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+void ldb_add_bridge_helper(struct ldb *ldb,
+ const struct drm_bridge_funcs *bridge_funcs)
+{
+ struct ldb_channel *ldb_ch;
+ int i;
+
+ for (i = 0; i < MAX_LDB_CHAN_NUM; i++) {
+ ldb_ch = ldb->channel[i];
+
+ if (!ldb_ch->is_available)
+ continue;
+
+ ldb_ch->bridge.driver_private = ldb_ch;
+ ldb_ch->bridge.funcs = bridge_funcs;
+ ldb_ch->bridge.of_node = ldb_ch->np;
+
+ drm_bridge_add(&ldb_ch->bridge);
+ }
+}
+
+void ldb_remove_bridge_helper(struct ldb *ldb)
+{
+ struct ldb_channel *ldb_ch;
+ int i;
+
+ for (i = 0; i < MAX_LDB_CHAN_NUM; i++) {
+ ldb_ch = ldb->channel[i];
+
+ if (!ldb_ch->is_available)
+ continue;
+
+ drm_bridge_remove(&ldb_ch->bridge);
+ }
+}
diff --git a/drivers/gpu/drm/bridge/imx/imx-ldb-helper.h b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.h
new file mode 100644
index 000000000..a0a5cde27
--- /dev/null
+++ b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.h
@@ -0,0 +1,96 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+/*
+ * Copyright 2019,2020,2022 NXP
+ */
+
+#ifndef __IMX_LDB_HELPER__
+#define __IMX_LDB_HELPER__
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_device.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_modeset_helper_vtables.h>
+
+#define LDB_CH0_MODE_EN_TO_DI0 BIT(0)
+#define LDB_CH0_MODE_EN_TO_DI1 (3 << 0)
+#define LDB_CH0_MODE_EN_MASK (3 << 0)
+#define LDB_CH1_MODE_EN_TO_DI0 BIT(2)
+#define LDB_CH1_MODE_EN_TO_DI1 (3 << 2)
+#define LDB_CH1_MODE_EN_MASK (3 << 2)
+#define LDB_SPLIT_MODE_EN BIT(4)
+#define LDB_DATA_WIDTH_CH0_24 BIT(5)
+#define LDB_BIT_MAP_CH0_JEIDA BIT(6)
+#define LDB_DATA_WIDTH_CH1_24 BIT(7)
+#define LDB_BIT_MAP_CH1_JEIDA BIT(8)
+#define LDB_DI0_VS_POL_ACT_LOW BIT(9)
+#define LDB_DI1_VS_POL_ACT_LOW BIT(10)
+
+#define MAX_LDB_CHAN_NUM 2
+
+enum ldb_channel_link_type {
+ LDB_CH_SINGLE_LINK,
+ LDB_CH_DUAL_LINK_EVEN_ODD_PIXELS,
+ LDB_CH_DUAL_LINK_ODD_EVEN_PIXELS,
+};
+
+struct ldb;
+
+struct ldb_channel {
+ struct ldb *ldb;
+ struct drm_bridge bridge;
+ struct drm_bridge *next_bridge;
+ struct device_node *np;
+ u32 chno;
+ bool is_available;
+ u32 in_bus_format;
+ u32 out_bus_format;
+ enum ldb_channel_link_type link_type;
+};
+
+struct ldb {
+ struct regmap *regmap;
+ struct device *dev;
+ struct ldb_channel *channel[MAX_LDB_CHAN_NUM];
+ unsigned int ctrl_reg;
+ u32 ldb_ctrl;
+ unsigned int available_ch_cnt;
+};
+
+#define bridge_to_ldb_ch(b) container_of(b, struct ldb_channel, bridge)
+
+bool ldb_channel_is_single_link(struct ldb_channel *ldb_ch);
+bool ldb_channel_is_split_link(struct ldb_channel *ldb_ch);
+
+int ldb_bridge_atomic_check_helper(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state);
+
+void ldb_bridge_mode_set_helper(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode);
+
+void ldb_bridge_enable_helper(struct drm_bridge *bridge);
+
+void ldb_bridge_disable_helper(struct drm_bridge *bridge);
+
+int ldb_bridge_attach_helper(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags);
+
+int ldb_init_helper(struct ldb *ldb);
+
+int ldb_find_next_bridge_helper(struct ldb *ldb);
+
+void ldb_add_bridge_helper(struct ldb *ldb,
+ const struct drm_bridge_funcs *bridge_funcs);
+
+void ldb_remove_bridge_helper(struct ldb *ldb);
+
+#endif /* __IMX_LDB_HELPER__ */
diff --git a/drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c b/drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c
new file mode 100644
index 000000000..178af8d2d
--- /dev/null
+++ b/drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c
@@ -0,0 +1,588 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/*
+ * Copyright 2020 NXP
+ */
+
+#include <linux/clk.h>
+#include <linux/media-bus-format.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/phy/phy.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+
+#include <drm/drm_atomic_state_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_of.h>
+#include <drm/drm_print.h>
+
+#include "imx-ldb-helper.h"
+
+#define LDB_CH0_10BIT_EN BIT(22)
+#define LDB_CH1_10BIT_EN BIT(23)
+#define LDB_CH0_DATA_WIDTH_24BIT BIT(24)
+#define LDB_CH1_DATA_WIDTH_24BIT BIT(26)
+#define LDB_CH0_DATA_WIDTH_30BIT (2 << 24)
+#define LDB_CH1_DATA_WIDTH_30BIT (2 << 26)
+
+#define SS_CTRL 0x20
+#define CH_HSYNC_M(id) BIT(0 + ((id) * 2))
+#define CH_VSYNC_M(id) BIT(1 + ((id) * 2))
+#define CH_PHSYNC(id) BIT(0 + ((id) * 2))
+#define CH_PVSYNC(id) BIT(1 + ((id) * 2))
+
+#define DRIVER_NAME "imx8qm-ldb"
+
+struct imx8qm_ldb_channel {
+ struct ldb_channel base;
+ struct phy *phy;
+};
+
+struct imx8qm_ldb {
+ struct ldb base;
+ struct device *dev;
+ struct imx8qm_ldb_channel channel[MAX_LDB_CHAN_NUM];
+ struct clk *clk_pixel;
+ struct clk *clk_bypass;
+ int active_chno;
+};
+
+static inline struct imx8qm_ldb_channel *
+base_to_imx8qm_ldb_channel(struct ldb_channel *base)
+{
+ return container_of(base, struct imx8qm_ldb_channel, base);
+}
+
+static inline struct imx8qm_ldb *base_to_imx8qm_ldb(struct ldb *base)
+{
+ return container_of(base, struct imx8qm_ldb, base);
+}
+
+static void imx8qm_ldb_set_phy_cfg(struct imx8qm_ldb *imx8qm_ldb,
+ unsigned long di_clk,
+ bool is_split, bool is_slave,
+ struct phy_configure_opts_lvds *phy_cfg)
+{
+ phy_cfg->bits_per_lane_and_dclk_cycle = 7;
+ phy_cfg->lanes = 4;
+ phy_cfg->differential_clk_rate = is_split ? di_clk / 2 : di_clk;
+ phy_cfg->is_slave = is_slave;
+}
+
+static int imx8qm_ldb_bridge_atomic_check(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct ldb_channel *ldb_ch = bridge->driver_private;
+ struct ldb *ldb = ldb_ch->ldb;
+ struct imx8qm_ldb_channel *imx8qm_ldb_ch =
+ base_to_imx8qm_ldb_channel(ldb_ch);
+ struct imx8qm_ldb *imx8qm_ldb = base_to_imx8qm_ldb(ldb);
+ struct drm_display_mode *adj = &crtc_state->adjusted_mode;
+ unsigned long di_clk = adj->clock * 1000;
+ bool is_split = ldb_channel_is_split_link(ldb_ch);
+ union phy_configure_opts opts = { };
+ struct phy_configure_opts_lvds *phy_cfg = &opts.lvds;
+ int ret;
+
+ ret = ldb_bridge_atomic_check_helper(bridge, bridge_state,
+ crtc_state, conn_state);
+ if (ret)
+ return ret;
+
+ imx8qm_ldb_set_phy_cfg(imx8qm_ldb, di_clk, is_split, false, phy_cfg);
+ ret = phy_validate(imx8qm_ldb_ch->phy, PHY_MODE_LVDS, 0, &opts);
+ if (ret < 0) {
+ DRM_DEV_DEBUG_DRIVER(imx8qm_ldb->dev,
+ "failed to validate PHY: %d\n", ret);
+ return ret;
+ }
+
+ if (is_split) {
+ imx8qm_ldb_ch =
+ &imx8qm_ldb->channel[imx8qm_ldb->active_chno ^ 1];
+ imx8qm_ldb_set_phy_cfg(imx8qm_ldb, di_clk, is_split, true,
+ phy_cfg);
+ ret = phy_validate(imx8qm_ldb_ch->phy, PHY_MODE_LVDS, 0, &opts);
+ if (ret < 0) {
+ DRM_DEV_DEBUG_DRIVER(imx8qm_ldb->dev,
+ "failed to validate slave PHY: %d\n",
+ ret);
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+static void
+imx8qm_ldb_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ struct ldb_channel *ldb_ch = bridge->driver_private;
+ struct ldb *ldb = ldb_ch->ldb;
+ struct imx8qm_ldb_channel *imx8qm_ldb_ch =
+ base_to_imx8qm_ldb_channel(ldb_ch);
+ struct imx8qm_ldb *imx8qm_ldb = base_to_imx8qm_ldb(ldb);
+ struct device *dev = imx8qm_ldb->dev;
+ unsigned long di_clk = adjusted_mode->clock * 1000;
+ bool is_split = ldb_channel_is_split_link(ldb_ch);
+ union phy_configure_opts opts = { };
+ struct phy_configure_opts_lvds *phy_cfg = &opts.lvds;
+ u32 chno = ldb_ch->chno;
+ int ret;
+
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "failed to get runtime PM sync: %d\n", ret);
+
+ ret = phy_init(imx8qm_ldb_ch->phy);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "failed to initialize PHY: %d\n", ret);
+
+ clk_set_rate(imx8qm_ldb->clk_bypass, di_clk);
+ clk_set_rate(imx8qm_ldb->clk_pixel, di_clk);
+
+ imx8qm_ldb_set_phy_cfg(imx8qm_ldb, di_clk, is_split, false, phy_cfg);
+ ret = phy_configure(imx8qm_ldb_ch->phy, &opts);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "failed to configure PHY: %d\n", ret);
+
+ if (is_split) {
+ imx8qm_ldb_ch =
+ &imx8qm_ldb->channel[imx8qm_ldb->active_chno ^ 1];
+ imx8qm_ldb_set_phy_cfg(imx8qm_ldb, di_clk, is_split, true,
+ phy_cfg);
+ ret = phy_configure(imx8qm_ldb_ch->phy, &opts);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "failed to configure slave PHY: %d\n",
+ ret);
+ }
+
+ /* input VSYNC signal from pixel link is active low */
+ if (ldb_ch->chno == 0 || is_split)
+ ldb->ldb_ctrl |= LDB_DI0_VS_POL_ACT_LOW;
+ if (ldb_ch->chno == 1 || is_split)
+ ldb->ldb_ctrl |= LDB_DI1_VS_POL_ACT_LOW;
+
+ switch (ldb_ch->out_bus_format) {
+ case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
+ case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
+ if (ldb_ch->chno == 0 || is_split)
+ ldb->ldb_ctrl |= LDB_CH0_DATA_WIDTH_24BIT;
+ if (ldb_ch->chno == 1 || is_split)
+ ldb->ldb_ctrl |= LDB_CH1_DATA_WIDTH_24BIT;
+ break;
+ }
+
+ ldb_bridge_mode_set_helper(bridge, mode, adjusted_mode);
+
+ if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
+ regmap_update_bits(ldb->regmap, SS_CTRL, CH_VSYNC_M(chno), 0);
+ else if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
+ regmap_update_bits(ldb->regmap, SS_CTRL,
+ CH_VSYNC_M(chno), CH_PVSYNC(chno));
+
+ if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
+ regmap_update_bits(ldb->regmap, SS_CTRL, CH_HSYNC_M(chno), 0);
+ else if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
+ regmap_update_bits(ldb->regmap, SS_CTRL,
+ CH_HSYNC_M(chno), CH_PHSYNC(chno));
+}
+
+static void
+imx8qm_ldb_bridge_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct ldb_channel *ldb_ch = bridge->driver_private;
+ struct ldb *ldb = ldb_ch->ldb;
+ struct imx8qm_ldb_channel *imx8qm_ldb_ch =
+ base_to_imx8qm_ldb_channel(ldb_ch);
+ struct imx8qm_ldb *imx8qm_ldb = base_to_imx8qm_ldb(ldb);
+ struct device *dev = imx8qm_ldb->dev;
+ bool is_split = ldb_channel_is_split_link(ldb_ch);
+ int ret;
+
+ clk_prepare_enable(imx8qm_ldb->clk_pixel);
+ clk_prepare_enable(imx8qm_ldb->clk_bypass);
+
+ /* both DI0 and DI1 connect with pixel link, so ok to use DI0 only */
+ if (ldb_ch->chno == 0 || is_split) {
+ ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK;
+ ldb->ldb_ctrl |= LDB_CH0_MODE_EN_TO_DI0;
+ }
+ if (ldb_ch->chno == 1 || is_split) {
+ ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK;
+ ldb->ldb_ctrl |= LDB_CH1_MODE_EN_TO_DI0;
+ }
+
+ if (is_split) {
+ ret = phy_power_on(imx8qm_ldb->channel[0].phy);
+ if (ret)
+ DRM_DEV_ERROR(dev,
+ "failed to power on channel0 PHY: %d\n",
+ ret);
+
+ ret = phy_power_on(imx8qm_ldb->channel[1].phy);
+ if (ret)
+ DRM_DEV_ERROR(dev,
+ "failed to power on channel1 PHY: %d\n",
+ ret);
+ } else {
+ ret = phy_power_on(imx8qm_ldb_ch->phy);
+ if (ret)
+ DRM_DEV_ERROR(dev, "failed to power on PHY: %d\n", ret);
+ }
+
+ ldb_bridge_enable_helper(bridge);
+}
+
+static void
+imx8qm_ldb_bridge_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct ldb_channel *ldb_ch = bridge->driver_private;
+ struct ldb *ldb = ldb_ch->ldb;
+ struct imx8qm_ldb_channel *imx8qm_ldb_ch =
+ base_to_imx8qm_ldb_channel(ldb_ch);
+ struct imx8qm_ldb *imx8qm_ldb = base_to_imx8qm_ldb(ldb);
+ struct device *dev = imx8qm_ldb->dev;
+ bool is_split = ldb_channel_is_split_link(ldb_ch);
+ int ret;
+
+ ldb_bridge_disable_helper(bridge);
+
+ if (is_split) {
+ ret = phy_power_off(imx8qm_ldb->channel[0].phy);
+ if (ret)
+ DRM_DEV_ERROR(dev,
+ "failed to power off channel0 PHY: %d\n",
+ ret);
+ ret = phy_power_off(imx8qm_ldb->channel[1].phy);
+ if (ret)
+ DRM_DEV_ERROR(dev,
+ "failed to power off channel1 PHY: %d\n",
+ ret);
+ } else {
+ ret = phy_power_off(imx8qm_ldb_ch->phy);
+ if (ret)
+ DRM_DEV_ERROR(dev, "failed to power off PHY: %d\n", ret);
+ }
+
+ clk_disable_unprepare(imx8qm_ldb->clk_bypass);
+ clk_disable_unprepare(imx8qm_ldb->clk_pixel);
+
+ ret = pm_runtime_put(dev);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "failed to put runtime PM: %d\n", ret);
+}
+
+static const u32 imx8qm_ldb_bus_output_fmts[] = {
+ MEDIA_BUS_FMT_RGB666_1X7X3_SPWG,
+ MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
+ MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA,
+ MEDIA_BUS_FMT_FIXED,
+};
+
+static bool imx8qm_ldb_bus_output_fmt_supported(u32 fmt)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(imx8qm_ldb_bus_output_fmts); i++) {
+ if (imx8qm_ldb_bus_output_fmts[i] == fmt)
+ return true;
+ }
+
+ return false;
+}
+
+static u32 *
+imx8qm_ldb_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ struct drm_display_info *di;
+ const struct drm_format_info *finfo;
+ u32 *input_fmts;
+
+ if (!imx8qm_ldb_bus_output_fmt_supported(output_fmt))
+ return NULL;
+
+ *num_input_fmts = 1;
+
+ input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ switch (output_fmt) {
+ case MEDIA_BUS_FMT_FIXED:
+ di = &conn_state->connector->display_info;
+
+ /*
+ * Look at the first bus format to determine input format.
+ * Default to MEDIA_BUS_FMT_RGB888_1X36_CPADLO, if no match.
+ */
+ if (di->num_bus_formats) {
+ finfo = drm_format_info(di->bus_formats[0]);
+
+ input_fmts[0] = finfo->depth == 18 ?
+ MEDIA_BUS_FMT_RGB666_1X36_CPADLO :
+ MEDIA_BUS_FMT_RGB888_1X36_CPADLO;
+ } else {
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X36_CPADLO;
+ }
+ break;
+ case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
+ input_fmts[0] = MEDIA_BUS_FMT_RGB666_1X36_CPADLO;
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
+ case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X36_CPADLO;
+ break;
+ default:
+ kfree(input_fmts);
+ input_fmts = NULL;
+ break;
+ }
+
+ return input_fmts;
+}
+
+static u32 *
+imx8qm_ldb_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ unsigned int *num_output_fmts)
+{
+ *num_output_fmts = ARRAY_SIZE(imx8qm_ldb_bus_output_fmts);
+ return kmemdup(imx8qm_ldb_bus_output_fmts,
+ sizeof(imx8qm_ldb_bus_output_fmts), GFP_KERNEL);
+}
+
+static enum drm_mode_status
+imx8qm_ldb_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct ldb_channel *ldb_ch = bridge->driver_private;
+ bool is_single = ldb_channel_is_single_link(ldb_ch);
+
+ if (mode->clock > 300000)
+ return MODE_CLOCK_HIGH;
+
+ if (mode->clock > 150000 && is_single)
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
+}
+
+static const struct drm_bridge_funcs imx8qm_ldb_bridge_funcs = {
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .mode_valid = imx8qm_ldb_bridge_mode_valid,
+ .attach = ldb_bridge_attach_helper,
+ .atomic_check = imx8qm_ldb_bridge_atomic_check,
+ .mode_set = imx8qm_ldb_bridge_mode_set,
+ .atomic_enable = imx8qm_ldb_bridge_atomic_enable,
+ .atomic_disable = imx8qm_ldb_bridge_atomic_disable,
+ .atomic_get_input_bus_fmts =
+ imx8qm_ldb_bridge_atomic_get_input_bus_fmts,
+ .atomic_get_output_bus_fmts =
+ imx8qm_ldb_bridge_atomic_get_output_bus_fmts,
+};
+
+static int imx8qm_ldb_get_phy(struct imx8qm_ldb *imx8qm_ldb)
+{
+ struct imx8qm_ldb_channel *imx8qm_ldb_ch;
+ struct ldb_channel *ldb_ch;
+ struct device *dev = imx8qm_ldb->dev;
+ int i, ret;
+
+ for (i = 0; i < MAX_LDB_CHAN_NUM; i++) {
+ imx8qm_ldb_ch = &imx8qm_ldb->channel[i];
+ ldb_ch = &imx8qm_ldb_ch->base;
+
+ if (!ldb_ch->is_available)
+ continue;
+
+ imx8qm_ldb_ch->phy = devm_of_phy_get(dev, ldb_ch->np,
+ "lvds_phy");
+ if (IS_ERR(imx8qm_ldb_ch->phy)) {
+ ret = PTR_ERR(imx8qm_ldb_ch->phy);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev,
+ "failed to get channel%d PHY: %d\n",
+ i, ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int imx8qm_ldb_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct imx8qm_ldb *imx8qm_ldb;
+ struct imx8qm_ldb_channel *imx8qm_ldb_ch;
+ struct ldb *ldb;
+ struct ldb_channel *ldb_ch;
+ struct device_node *port1, *port2;
+ int pixel_order;
+ int ret, i;
+
+ imx8qm_ldb = devm_kzalloc(dev, sizeof(*imx8qm_ldb), GFP_KERNEL);
+ if (!imx8qm_ldb)
+ return -ENOMEM;
+
+ imx8qm_ldb->clk_pixel = devm_clk_get(dev, "pixel");
+ if (IS_ERR(imx8qm_ldb->clk_pixel)) {
+ ret = PTR_ERR(imx8qm_ldb->clk_pixel);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev,
+ "failed to get pixel clock: %d\n", ret);
+ return ret;
+ }
+
+ imx8qm_ldb->clk_bypass = devm_clk_get(dev, "bypass");
+ if (IS_ERR(imx8qm_ldb->clk_bypass)) {
+ ret = PTR_ERR(imx8qm_ldb->clk_bypass);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev,
+ "failed to get bypass clock: %d\n", ret);
+ return ret;
+ }
+
+ imx8qm_ldb->dev = dev;
+
+ ldb = &imx8qm_ldb->base;
+ ldb->dev = dev;
+ ldb->ctrl_reg = 0xe0;
+
+ for (i = 0; i < MAX_LDB_CHAN_NUM; i++)
+ ldb->channel[i] = &imx8qm_ldb->channel[i].base;
+
+ ret = ldb_init_helper(ldb);
+ if (ret)
+ return ret;
+
+ if (ldb->available_ch_cnt == 0) {
+ DRM_DEV_DEBUG_DRIVER(dev, "no available channel\n");
+ return 0;
+ }
+
+ if (ldb->available_ch_cnt == 2) {
+ port1 = of_graph_get_port_by_id(ldb->channel[0]->np, 1);
+ port2 = of_graph_get_port_by_id(ldb->channel[1]->np, 1);
+ pixel_order =
+ drm_of_lvds_get_dual_link_pixel_order(port1, port2);
+ of_node_put(port1);
+ of_node_put(port2);
+
+ if (pixel_order != DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS) {
+ DRM_DEV_ERROR(dev, "invalid dual link pixel order: %d\n",
+ pixel_order);
+ return -EINVAL;
+ }
+
+ imx8qm_ldb->active_chno = 0;
+ imx8qm_ldb_ch = &imx8qm_ldb->channel[0];
+ ldb_ch = &imx8qm_ldb_ch->base;
+ ldb_ch->link_type = pixel_order;
+ } else {
+ for (i = 0; i < MAX_LDB_CHAN_NUM; i++) {
+ imx8qm_ldb_ch = &imx8qm_ldb->channel[i];
+ ldb_ch = &imx8qm_ldb_ch->base;
+
+ if (ldb_ch->is_available) {
+ imx8qm_ldb->active_chno = ldb_ch->chno;
+ break;
+ }
+ }
+ }
+
+ ret = imx8qm_ldb_get_phy(imx8qm_ldb);
+ if (ret)
+ return ret;
+
+ ret = ldb_find_next_bridge_helper(ldb);
+ if (ret)
+ return ret;
+
+ platform_set_drvdata(pdev, imx8qm_ldb);
+ pm_runtime_enable(dev);
+
+ ldb_add_bridge_helper(ldb, &imx8qm_ldb_bridge_funcs);
+
+ return ret;
+}
+
+static int imx8qm_ldb_remove(struct platform_device *pdev)
+{
+ struct imx8qm_ldb *imx8qm_ldb = platform_get_drvdata(pdev);
+ struct ldb *ldb = &imx8qm_ldb->base;
+
+ ldb_remove_bridge_helper(ldb);
+
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static int __maybe_unused imx8qm_ldb_runtime_suspend(struct device *dev)
+{
+ return 0;
+}
+
+static int __maybe_unused imx8qm_ldb_runtime_resume(struct device *dev)
+{
+ struct imx8qm_ldb *imx8qm_ldb = dev_get_drvdata(dev);
+ struct ldb *ldb = &imx8qm_ldb->base;
+
+ /* disable LDB by resetting the control register to POR default */
+ regmap_write(ldb->regmap, ldb->ctrl_reg, 0);
+
+ return 0;
+}
+
+static const struct dev_pm_ops imx8qm_ldb_pm_ops = {
+ SET_RUNTIME_PM_OPS(imx8qm_ldb_runtime_suspend,
+ imx8qm_ldb_runtime_resume, NULL)
+};
+
+static const struct of_device_id imx8qm_ldb_dt_ids[] = {
+ { .compatible = "fsl,imx8qm-ldb" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx8qm_ldb_dt_ids);
+
+static struct platform_driver imx8qm_ldb_driver = {
+ .probe = imx8qm_ldb_probe,
+ .remove = imx8qm_ldb_remove,
+ .driver = {
+ .pm = &imx8qm_ldb_pm_ops,
+ .name = DRIVER_NAME,
+ .of_match_table = imx8qm_ldb_dt_ids,
+ },
+};
+module_platform_driver(imx8qm_ldb_driver);
+
+MODULE_DESCRIPTION("i.MX8QM LVDS Display Bridge(LDB)/Pixel Mapper bridge driver");
+MODULE_AUTHOR("Liu Ying <victor.liu@nxp.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c b/drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c
new file mode 100644
index 000000000..63948d5d2
--- /dev/null
+++ b/drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c
@@ -0,0 +1,723 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/*
+ * Copyright 2020 NXP
+ */
+
+#include <linux/clk.h>
+#include <linux/media-bus-format.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/phy/phy.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+
+#include <drm/drm_atomic_state_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_of.h>
+#include <drm/drm_print.h>
+
+#include "imx-ldb-helper.h"
+
+#define LDB_CH_SEL BIT(28)
+
+#define SS_CTRL 0x20
+#define CH_HSYNC_M(id) BIT(0 + ((id) * 2))
+#define CH_VSYNC_M(id) BIT(1 + ((id) * 2))
+#define CH_PHSYNC(id) BIT(0 + ((id) * 2))
+#define CH_PVSYNC(id) BIT(1 + ((id) * 2))
+
+#define DRIVER_NAME "imx8qxp-ldb"
+
+struct imx8qxp_ldb_channel {
+ struct ldb_channel base;
+ struct phy *phy;
+ unsigned int di_id;
+};
+
+struct imx8qxp_ldb {
+ struct ldb base;
+ struct device *dev;
+ struct imx8qxp_ldb_channel channel[MAX_LDB_CHAN_NUM];
+ struct clk *clk_pixel;
+ struct clk *clk_bypass;
+ struct drm_bridge *companion;
+ int active_chno;
+};
+
+static inline struct imx8qxp_ldb_channel *
+base_to_imx8qxp_ldb_channel(struct ldb_channel *base)
+{
+ return container_of(base, struct imx8qxp_ldb_channel, base);
+}
+
+static inline struct imx8qxp_ldb *base_to_imx8qxp_ldb(struct ldb *base)
+{
+ return container_of(base, struct imx8qxp_ldb, base);
+}
+
+static void imx8qxp_ldb_set_phy_cfg(struct imx8qxp_ldb *imx8qxp_ldb,
+ unsigned long di_clk, bool is_split,
+ struct phy_configure_opts_lvds *phy_cfg)
+{
+ phy_cfg->bits_per_lane_and_dclk_cycle = 7;
+ phy_cfg->lanes = 4;
+
+ if (is_split) {
+ phy_cfg->differential_clk_rate = di_clk / 2;
+ phy_cfg->is_slave = !imx8qxp_ldb->companion;
+ } else {
+ phy_cfg->differential_clk_rate = di_clk;
+ phy_cfg->is_slave = false;
+ }
+}
+
+static int
+imx8qxp_ldb_bridge_atomic_check(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct ldb_channel *ldb_ch = bridge->driver_private;
+ struct ldb *ldb = ldb_ch->ldb;
+ struct imx8qxp_ldb_channel *imx8qxp_ldb_ch =
+ base_to_imx8qxp_ldb_channel(ldb_ch);
+ struct imx8qxp_ldb *imx8qxp_ldb = base_to_imx8qxp_ldb(ldb);
+ struct drm_bridge *companion = imx8qxp_ldb->companion;
+ struct drm_display_mode *adj = &crtc_state->adjusted_mode;
+ unsigned long di_clk = adj->clock * 1000;
+ bool is_split = ldb_channel_is_split_link(ldb_ch);
+ union phy_configure_opts opts = { };
+ struct phy_configure_opts_lvds *phy_cfg = &opts.lvds;
+ int ret;
+
+ ret = ldb_bridge_atomic_check_helper(bridge, bridge_state,
+ crtc_state, conn_state);
+ if (ret)
+ return ret;
+
+ imx8qxp_ldb_set_phy_cfg(imx8qxp_ldb, di_clk, is_split, phy_cfg);
+ ret = phy_validate(imx8qxp_ldb_ch->phy, PHY_MODE_LVDS, 0, &opts);
+ if (ret < 0) {
+ DRM_DEV_DEBUG_DRIVER(imx8qxp_ldb->dev,
+ "failed to validate PHY: %d\n", ret);
+ return ret;
+ }
+
+ if (is_split && companion) {
+ ret = companion->funcs->atomic_check(companion,
+ bridge_state, crtc_state, conn_state);
+ if (ret)
+ return ret;
+ }
+
+ return ret;
+}
+
+static void
+imx8qxp_ldb_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ struct ldb_channel *ldb_ch = bridge->driver_private;
+ struct ldb_channel *companion_ldb_ch;
+ struct ldb *ldb = ldb_ch->ldb;
+ struct imx8qxp_ldb_channel *imx8qxp_ldb_ch =
+ base_to_imx8qxp_ldb_channel(ldb_ch);
+ struct imx8qxp_ldb *imx8qxp_ldb = base_to_imx8qxp_ldb(ldb);
+ struct drm_bridge *companion = imx8qxp_ldb->companion;
+ struct device *dev = imx8qxp_ldb->dev;
+ unsigned long di_clk = adjusted_mode->clock * 1000;
+ bool is_split = ldb_channel_is_split_link(ldb_ch);
+ union phy_configure_opts opts = { };
+ struct phy_configure_opts_lvds *phy_cfg = &opts.lvds;
+ u32 chno = ldb_ch->chno;
+ int ret;
+
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "failed to get runtime PM sync: %d\n", ret);
+
+ ret = phy_init(imx8qxp_ldb_ch->phy);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "failed to initialize PHY: %d\n", ret);
+
+ ret = phy_set_mode(imx8qxp_ldb_ch->phy, PHY_MODE_LVDS);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "failed to set PHY mode: %d\n", ret);
+
+ if (is_split && companion) {
+ companion_ldb_ch = bridge_to_ldb_ch(companion);
+
+ companion_ldb_ch->in_bus_format = ldb_ch->in_bus_format;
+ companion_ldb_ch->out_bus_format = ldb_ch->out_bus_format;
+ }
+
+ clk_set_rate(imx8qxp_ldb->clk_bypass, di_clk);
+ clk_set_rate(imx8qxp_ldb->clk_pixel, di_clk);
+
+ imx8qxp_ldb_set_phy_cfg(imx8qxp_ldb, di_clk, is_split, phy_cfg);
+ ret = phy_configure(imx8qxp_ldb_ch->phy, &opts);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "failed to configure PHY: %d\n", ret);
+
+ if (chno == 0)
+ ldb->ldb_ctrl &= ~LDB_CH_SEL;
+ else
+ ldb->ldb_ctrl |= LDB_CH_SEL;
+
+ /* input VSYNC signal from pixel link is active low */
+ if (imx8qxp_ldb_ch->di_id == 0)
+ ldb->ldb_ctrl |= LDB_DI0_VS_POL_ACT_LOW;
+ else
+ ldb->ldb_ctrl |= LDB_DI1_VS_POL_ACT_LOW;
+
+ /*
+ * For split mode, settle input VSYNC signal polarity and
+ * channel selection down early.
+ */
+ if (is_split)
+ regmap_write(ldb->regmap, ldb->ctrl_reg, ldb->ldb_ctrl);
+
+ ldb_bridge_mode_set_helper(bridge, mode, adjusted_mode);
+
+ if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
+ regmap_update_bits(ldb->regmap, SS_CTRL, CH_VSYNC_M(chno), 0);
+ else if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
+ regmap_update_bits(ldb->regmap, SS_CTRL,
+ CH_VSYNC_M(chno), CH_PVSYNC(chno));
+
+ if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
+ regmap_update_bits(ldb->regmap, SS_CTRL, CH_HSYNC_M(chno), 0);
+ else if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
+ regmap_update_bits(ldb->regmap, SS_CTRL,
+ CH_HSYNC_M(chno), CH_PHSYNC(chno));
+
+ if (is_split && companion)
+ companion->funcs->mode_set(companion, mode, adjusted_mode);
+}
+
+static void
+imx8qxp_ldb_bridge_atomic_pre_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct ldb_channel *ldb_ch = bridge->driver_private;
+ struct ldb *ldb = ldb_ch->ldb;
+ struct imx8qxp_ldb *imx8qxp_ldb = base_to_imx8qxp_ldb(ldb);
+ struct drm_bridge *companion = imx8qxp_ldb->companion;
+ bool is_split = ldb_channel_is_split_link(ldb_ch);
+
+ clk_prepare_enable(imx8qxp_ldb->clk_pixel);
+ clk_prepare_enable(imx8qxp_ldb->clk_bypass);
+
+ if (is_split && companion)
+ companion->funcs->atomic_pre_enable(companion, old_bridge_state);
+}
+
+static void
+imx8qxp_ldb_bridge_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct ldb_channel *ldb_ch = bridge->driver_private;
+ struct ldb *ldb = ldb_ch->ldb;
+ struct imx8qxp_ldb_channel *imx8qxp_ldb_ch =
+ base_to_imx8qxp_ldb_channel(ldb_ch);
+ struct imx8qxp_ldb *imx8qxp_ldb = base_to_imx8qxp_ldb(ldb);
+ struct drm_bridge *companion = imx8qxp_ldb->companion;
+ struct device *dev = imx8qxp_ldb->dev;
+ bool is_split = ldb_channel_is_split_link(ldb_ch);
+ int ret;
+
+ if (ldb_ch->chno == 0 || is_split) {
+ ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK;
+ ldb->ldb_ctrl |= imx8qxp_ldb_ch->di_id == 0 ?
+ LDB_CH0_MODE_EN_TO_DI0 : LDB_CH0_MODE_EN_TO_DI1;
+ }
+ if (ldb_ch->chno == 1 || is_split) {
+ ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK;
+ ldb->ldb_ctrl |= imx8qxp_ldb_ch->di_id == 0 ?
+ LDB_CH1_MODE_EN_TO_DI0 : LDB_CH1_MODE_EN_TO_DI1;
+ }
+
+ ldb_bridge_enable_helper(bridge);
+
+ ret = phy_power_on(imx8qxp_ldb_ch->phy);
+ if (ret)
+ DRM_DEV_ERROR(dev, "failed to power on PHY: %d\n", ret);
+
+ if (is_split && companion)
+ companion->funcs->atomic_enable(companion, old_bridge_state);
+}
+
+static void
+imx8qxp_ldb_bridge_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct ldb_channel *ldb_ch = bridge->driver_private;
+ struct ldb *ldb = ldb_ch->ldb;
+ struct imx8qxp_ldb_channel *imx8qxp_ldb_ch =
+ base_to_imx8qxp_ldb_channel(ldb_ch);
+ struct imx8qxp_ldb *imx8qxp_ldb = base_to_imx8qxp_ldb(ldb);
+ struct drm_bridge *companion = imx8qxp_ldb->companion;
+ struct device *dev = imx8qxp_ldb->dev;
+ bool is_split = ldb_channel_is_split_link(ldb_ch);
+ int ret;
+
+ ret = phy_power_off(imx8qxp_ldb_ch->phy);
+ if (ret)
+ DRM_DEV_ERROR(dev, "failed to power off PHY: %d\n", ret);
+
+ ret = phy_exit(imx8qxp_ldb_ch->phy);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "failed to teardown PHY: %d\n", ret);
+
+ ldb_bridge_disable_helper(bridge);
+
+ clk_disable_unprepare(imx8qxp_ldb->clk_bypass);
+ clk_disable_unprepare(imx8qxp_ldb->clk_pixel);
+
+ if (is_split && companion)
+ companion->funcs->atomic_disable(companion, old_bridge_state);
+
+ ret = pm_runtime_put(dev);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "failed to put runtime PM: %d\n", ret);
+}
+
+static const u32 imx8qxp_ldb_bus_output_fmts[] = {
+ MEDIA_BUS_FMT_RGB666_1X7X3_SPWG,
+ MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
+ MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA,
+ MEDIA_BUS_FMT_FIXED,
+};
+
+static bool imx8qxp_ldb_bus_output_fmt_supported(u32 fmt)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(imx8qxp_ldb_bus_output_fmts); i++) {
+ if (imx8qxp_ldb_bus_output_fmts[i] == fmt)
+ return true;
+ }
+
+ return false;
+}
+
+static u32 *
+imx8qxp_ldb_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ struct drm_display_info *di;
+ const struct drm_format_info *finfo;
+ u32 *input_fmts;
+
+ if (!imx8qxp_ldb_bus_output_fmt_supported(output_fmt))
+ return NULL;
+
+ *num_input_fmts = 1;
+
+ input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ switch (output_fmt) {
+ case MEDIA_BUS_FMT_FIXED:
+ di = &conn_state->connector->display_info;
+
+ /*
+ * Look at the first bus format to determine input format.
+ * Default to MEDIA_BUS_FMT_RGB888_1X24, if no match.
+ */
+ if (di->num_bus_formats) {
+ finfo = drm_format_info(di->bus_formats[0]);
+
+ input_fmts[0] = finfo->depth == 18 ?
+ MEDIA_BUS_FMT_RGB666_1X24_CPADHI :
+ MEDIA_BUS_FMT_RGB888_1X24;
+ } else {
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
+ }
+ break;
+ case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
+ input_fmts[0] = MEDIA_BUS_FMT_RGB666_1X24_CPADHI;
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
+ case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
+ break;
+ default:
+ kfree(input_fmts);
+ input_fmts = NULL;
+ break;
+ }
+
+ return input_fmts;
+}
+
+static u32 *
+imx8qxp_ldb_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ unsigned int *num_output_fmts)
+{
+ *num_output_fmts = ARRAY_SIZE(imx8qxp_ldb_bus_output_fmts);
+ return kmemdup(imx8qxp_ldb_bus_output_fmts,
+ sizeof(imx8qxp_ldb_bus_output_fmts), GFP_KERNEL);
+}
+
+static enum drm_mode_status
+imx8qxp_ldb_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct ldb_channel *ldb_ch = bridge->driver_private;
+ bool is_single = ldb_channel_is_single_link(ldb_ch);
+
+ if (mode->clock > 170000)
+ return MODE_CLOCK_HIGH;
+
+ if (mode->clock > 150000 && is_single)
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
+}
+
+static const struct drm_bridge_funcs imx8qxp_ldb_bridge_funcs = {
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .mode_valid = imx8qxp_ldb_bridge_mode_valid,
+ .attach = ldb_bridge_attach_helper,
+ .atomic_check = imx8qxp_ldb_bridge_atomic_check,
+ .mode_set = imx8qxp_ldb_bridge_mode_set,
+ .atomic_pre_enable = imx8qxp_ldb_bridge_atomic_pre_enable,
+ .atomic_enable = imx8qxp_ldb_bridge_atomic_enable,
+ .atomic_disable = imx8qxp_ldb_bridge_atomic_disable,
+ .atomic_get_input_bus_fmts =
+ imx8qxp_ldb_bridge_atomic_get_input_bus_fmts,
+ .atomic_get_output_bus_fmts =
+ imx8qxp_ldb_bridge_atomic_get_output_bus_fmts,
+};
+
+static int imx8qxp_ldb_set_di_id(struct imx8qxp_ldb *imx8qxp_ldb)
+{
+ struct imx8qxp_ldb_channel *imx8qxp_ldb_ch =
+ &imx8qxp_ldb->channel[imx8qxp_ldb->active_chno];
+ struct ldb_channel *ldb_ch = &imx8qxp_ldb_ch->base;
+ struct device_node *ep, *remote;
+ struct device *dev = imx8qxp_ldb->dev;
+ struct of_endpoint endpoint;
+ int ret;
+
+ ep = of_graph_get_endpoint_by_regs(ldb_ch->np, 0, -1);
+ if (!ep) {
+ DRM_DEV_ERROR(dev, "failed to get port0 endpoint\n");
+ return -EINVAL;
+ }
+
+ remote = of_graph_get_remote_endpoint(ep);
+ of_node_put(ep);
+ if (!remote) {
+ DRM_DEV_ERROR(dev, "failed to get port0 remote endpoint\n");
+ return -EINVAL;
+ }
+
+ ret = of_graph_parse_endpoint(remote, &endpoint);
+ of_node_put(remote);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "failed to parse port0 remote endpoint: %d\n",
+ ret);
+ return ret;
+ }
+
+ imx8qxp_ldb_ch->di_id = endpoint.id;
+
+ return 0;
+}
+
+static int
+imx8qxp_ldb_check_chno_and_dual_link(struct ldb_channel *ldb_ch, int link)
+{
+ if ((link == DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS && ldb_ch->chno != 0) ||
+ (link == DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS && ldb_ch->chno != 1))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int imx8qxp_ldb_parse_dt_companion(struct imx8qxp_ldb *imx8qxp_ldb)
+{
+ struct imx8qxp_ldb_channel *imx8qxp_ldb_ch =
+ &imx8qxp_ldb->channel[imx8qxp_ldb->active_chno];
+ struct ldb_channel *ldb_ch = &imx8qxp_ldb_ch->base;
+ struct ldb_channel *companion_ldb_ch;
+ struct device_node *companion;
+ struct device_node *child;
+ struct device_node *companion_port = NULL;
+ struct device_node *port1, *port2;
+ struct device *dev = imx8qxp_ldb->dev;
+ const struct of_device_id *match;
+ u32 i;
+ int dual_link;
+ int ret;
+
+ /* Locate the companion LDB for dual-link operation, if any. */
+ companion = of_parse_phandle(dev->of_node, "fsl,companion-ldb", 0);
+ if (!companion)
+ return 0;
+
+ if (!of_device_is_available(companion)) {
+ DRM_DEV_ERROR(dev, "companion LDB is not available\n");
+ ret = -ENODEV;
+ goto out;
+ }
+
+ /*
+ * Sanity check: the companion bridge must have the same compatible
+ * string.
+ */
+ match = of_match_device(dev->driver->of_match_table, dev);
+ if (!of_device_is_compatible(companion, match->compatible)) {
+ DRM_DEV_ERROR(dev, "companion LDB is incompatible\n");
+ ret = -ENXIO;
+ goto out;
+ }
+
+ for_each_available_child_of_node(companion, child) {
+ ret = of_property_read_u32(child, "reg", &i);
+ if (ret || i > MAX_LDB_CHAN_NUM - 1) {
+ DRM_DEV_ERROR(dev,
+ "invalid channel node address: %u\n", i);
+ ret = -EINVAL;
+ of_node_put(child);
+ goto out;
+ }
+
+ /*
+ * Channel numbers have to be different, because channel0
+ * transmits odd pixels and channel1 transmits even pixels.
+ */
+ if (i == (ldb_ch->chno ^ 0x1)) {
+ companion_port = child;
+ break;
+ }
+ }
+
+ if (!companion_port) {
+ DRM_DEV_ERROR(dev,
+ "failed to find companion LDB channel port\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /*
+ * We need to work out if the sink is expecting us to function in
+ * dual-link mode. We do this by looking at the DT port nodes we are
+ * connected to. If they are marked as expecting odd pixels and
+ * even pixels than we need to enable LDB split mode.
+ */
+ port1 = of_graph_get_port_by_id(ldb_ch->np, 1);
+ port2 = of_graph_get_port_by_id(companion_port, 1);
+ dual_link = drm_of_lvds_get_dual_link_pixel_order(port1, port2);
+ of_node_put(port1);
+ of_node_put(port2);
+
+ switch (dual_link) {
+ case DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS:
+ ldb_ch->link_type = LDB_CH_DUAL_LINK_ODD_EVEN_PIXELS;
+ break;
+ case DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS:
+ ldb_ch->link_type = LDB_CH_DUAL_LINK_EVEN_ODD_PIXELS;
+ break;
+ default:
+ ret = dual_link;
+ DRM_DEV_ERROR(dev,
+ "failed to get dual link pixel order: %d\n", ret);
+ goto out;
+ }
+
+ ret = imx8qxp_ldb_check_chno_and_dual_link(ldb_ch, dual_link);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev,
+ "unmatched channel number(%u) vs dual link(%d)\n",
+ ldb_ch->chno, dual_link);
+ goto out;
+ }
+
+ imx8qxp_ldb->companion = of_drm_find_bridge(companion_port);
+ if (!imx8qxp_ldb->companion) {
+ ret = -EPROBE_DEFER;
+ DRM_DEV_DEBUG_DRIVER(dev,
+ "failed to find bridge for companion bridge: %d\n",
+ ret);
+ goto out;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev,
+ "dual-link configuration detected (companion bridge %pOF)\n",
+ companion);
+
+ companion_ldb_ch = bridge_to_ldb_ch(imx8qxp_ldb->companion);
+ companion_ldb_ch->link_type = ldb_ch->link_type;
+out:
+ of_node_put(companion_port);
+ of_node_put(companion);
+ return ret;
+}
+
+static int imx8qxp_ldb_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct imx8qxp_ldb *imx8qxp_ldb;
+ struct imx8qxp_ldb_channel *imx8qxp_ldb_ch;
+ struct ldb *ldb;
+ struct ldb_channel *ldb_ch;
+ int ret, i;
+
+ imx8qxp_ldb = devm_kzalloc(dev, sizeof(*imx8qxp_ldb), GFP_KERNEL);
+ if (!imx8qxp_ldb)
+ return -ENOMEM;
+
+ imx8qxp_ldb->clk_pixel = devm_clk_get(dev, "pixel");
+ if (IS_ERR(imx8qxp_ldb->clk_pixel)) {
+ ret = PTR_ERR(imx8qxp_ldb->clk_pixel);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev,
+ "failed to get pixel clock: %d\n", ret);
+ return ret;
+ }
+
+ imx8qxp_ldb->clk_bypass = devm_clk_get(dev, "bypass");
+ if (IS_ERR(imx8qxp_ldb->clk_bypass)) {
+ ret = PTR_ERR(imx8qxp_ldb->clk_bypass);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev,
+ "failed to get bypass clock: %d\n", ret);
+ return ret;
+ }
+
+ imx8qxp_ldb->dev = dev;
+
+ ldb = &imx8qxp_ldb->base;
+ ldb->dev = dev;
+ ldb->ctrl_reg = 0xe0;
+
+ for (i = 0; i < MAX_LDB_CHAN_NUM; i++)
+ ldb->channel[i] = &imx8qxp_ldb->channel[i].base;
+
+ ret = ldb_init_helper(ldb);
+ if (ret)
+ return ret;
+
+ if (ldb->available_ch_cnt == 0) {
+ DRM_DEV_DEBUG_DRIVER(dev, "no available channel\n");
+ return 0;
+ } else if (ldb->available_ch_cnt > 1) {
+ DRM_DEV_ERROR(dev, "invalid available channel number(%u)\n",
+ ldb->available_ch_cnt);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < MAX_LDB_CHAN_NUM; i++) {
+ imx8qxp_ldb_ch = &imx8qxp_ldb->channel[i];
+ ldb_ch = &imx8qxp_ldb_ch->base;
+
+ if (ldb_ch->is_available) {
+ imx8qxp_ldb->active_chno = ldb_ch->chno;
+ break;
+ }
+ }
+
+ imx8qxp_ldb_ch->phy = devm_of_phy_get(dev, ldb_ch->np, "lvds_phy");
+ if (IS_ERR(imx8qxp_ldb_ch->phy)) {
+ ret = PTR_ERR(imx8qxp_ldb_ch->phy);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev, "failed to get channel%d PHY: %d\n",
+ imx8qxp_ldb->active_chno, ret);
+ return ret;
+ }
+
+ ret = ldb_find_next_bridge_helper(ldb);
+ if (ret)
+ return ret;
+
+ ret = imx8qxp_ldb_set_di_id(imx8qxp_ldb);
+ if (ret)
+ return ret;
+
+ ret = imx8qxp_ldb_parse_dt_companion(imx8qxp_ldb);
+ if (ret)
+ return ret;
+
+ platform_set_drvdata(pdev, imx8qxp_ldb);
+ pm_runtime_enable(dev);
+
+ ldb_add_bridge_helper(ldb, &imx8qxp_ldb_bridge_funcs);
+
+ return ret;
+}
+
+static int imx8qxp_ldb_remove(struct platform_device *pdev)
+{
+ struct imx8qxp_ldb *imx8qxp_ldb = platform_get_drvdata(pdev);
+ struct ldb *ldb = &imx8qxp_ldb->base;
+
+ ldb_remove_bridge_helper(ldb);
+
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static int __maybe_unused imx8qxp_ldb_runtime_suspend(struct device *dev)
+{
+ return 0;
+}
+
+static int __maybe_unused imx8qxp_ldb_runtime_resume(struct device *dev)
+{
+ struct imx8qxp_ldb *imx8qxp_ldb = dev_get_drvdata(dev);
+ struct ldb *ldb = &imx8qxp_ldb->base;
+
+ /* disable LDB by resetting the control register to POR default */
+ regmap_write(ldb->regmap, ldb->ctrl_reg, 0);
+
+ return 0;
+}
+
+static const struct dev_pm_ops imx8qxp_ldb_pm_ops = {
+ SET_RUNTIME_PM_OPS(imx8qxp_ldb_runtime_suspend,
+ imx8qxp_ldb_runtime_resume, NULL)
+};
+
+static const struct of_device_id imx8qxp_ldb_dt_ids[] = {
+ { .compatible = "fsl,imx8qxp-ldb" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx8qxp_ldb_dt_ids);
+
+static struct platform_driver imx8qxp_ldb_driver = {
+ .probe = imx8qxp_ldb_probe,
+ .remove = imx8qxp_ldb_remove,
+ .driver = {
+ .pm = &imx8qxp_ldb_pm_ops,
+ .name = DRIVER_NAME,
+ .of_match_table = imx8qxp_ldb_dt_ids,
+ },
+};
+module_platform_driver(imx8qxp_ldb_driver);
+
+MODULE_DESCRIPTION("i.MX8QXP LVDS Display Bridge(LDB)/Pixel Mapper bridge driver");
+MODULE_AUTHOR("Liu Ying <victor.liu@nxp.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-combiner.c b/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-combiner.c
new file mode 100644
index 000000000..503bd8db8
--- /dev/null
+++ b/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-combiner.c
@@ -0,0 +1,450 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/*
+ * Copyright 2020 NXP
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include <drm/drm_atomic_state_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_print.h>
+
+#define PC_CTRL_REG 0x0
+#define PC_COMBINE_ENABLE BIT(0)
+#define PC_DISP_BYPASS(n) BIT(1 + 21 * (n))
+#define PC_DISP_HSYNC_POLARITY(n) BIT(2 + 11 * (n))
+#define PC_DISP_HSYNC_POLARITY_POS(n) DISP_HSYNC_POLARITY(n)
+#define PC_DISP_VSYNC_POLARITY(n) BIT(3 + 11 * (n))
+#define PC_DISP_VSYNC_POLARITY_POS(n) DISP_VSYNC_POLARITY(n)
+#define PC_DISP_DVALID_POLARITY(n) BIT(4 + 11 * (n))
+#define PC_DISP_DVALID_POLARITY_POS(n) DISP_DVALID_POLARITY(n)
+#define PC_VSYNC_MASK_ENABLE BIT(5)
+#define PC_SKIP_MODE BIT(6)
+#define PC_SKIP_NUMBER_MASK GENMASK(12, 7)
+#define PC_SKIP_NUMBER(n) FIELD_PREP(PC_SKIP_NUMBER_MASK, (n))
+#define PC_DISP0_PIX_DATA_FORMAT_MASK GENMASK(18, 16)
+#define PC_DISP0_PIX_DATA_FORMAT(fmt) \
+ FIELD_PREP(PC_DISP0_PIX_DATA_FORMAT_MASK, (fmt))
+#define PC_DISP1_PIX_DATA_FORMAT_MASK GENMASK(21, 19)
+#define PC_DISP1_PIX_DATA_FORMAT(fmt) \
+ FIELD_PREP(PC_DISP1_PIX_DATA_FORMAT_MASK, (fmt))
+
+#define PC_SW_RESET_REG 0x20
+#define PC_SW_RESET_N BIT(0)
+#define PC_DISP_SW_RESET_N(n) BIT(1 + (n))
+#define PC_FULL_RESET_N (PC_SW_RESET_N | \
+ PC_DISP_SW_RESET_N(0) | \
+ PC_DISP_SW_RESET_N(1))
+
+#define PC_REG_SET 0x4
+#define PC_REG_CLR 0x8
+
+#define DRIVER_NAME "imx8qxp-pixel-combiner"
+
+enum imx8qxp_pc_pix_data_format {
+ RGB,
+ YUV444,
+ YUV422,
+ SPLIT_RGB,
+};
+
+struct imx8qxp_pc_channel {
+ struct drm_bridge bridge;
+ struct drm_bridge *next_bridge;
+ struct imx8qxp_pc *pc;
+ unsigned int stream_id;
+ bool is_available;
+};
+
+struct imx8qxp_pc {
+ struct device *dev;
+ struct imx8qxp_pc_channel ch[2];
+ struct clk *clk_apb;
+ void __iomem *base;
+};
+
+static inline u32 imx8qxp_pc_read(struct imx8qxp_pc *pc, unsigned int offset)
+{
+ return readl(pc->base + offset);
+}
+
+static inline void
+imx8qxp_pc_write(struct imx8qxp_pc *pc, unsigned int offset, u32 value)
+{
+ writel(value, pc->base + offset);
+}
+
+static inline void
+imx8qxp_pc_write_set(struct imx8qxp_pc *pc, unsigned int offset, u32 value)
+{
+ imx8qxp_pc_write(pc, offset + PC_REG_SET, value);
+}
+
+static inline void
+imx8qxp_pc_write_clr(struct imx8qxp_pc *pc, unsigned int offset, u32 value)
+{
+ imx8qxp_pc_write(pc, offset + PC_REG_CLR, value);
+}
+
+static enum drm_mode_status
+imx8qxp_pc_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ if (mode->hdisplay > 2560)
+ return MODE_BAD_HVALUE;
+
+ return MODE_OK;
+}
+
+static int imx8qxp_pc_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct imx8qxp_pc_channel *ch = bridge->driver_private;
+ struct imx8qxp_pc *pc = ch->pc;
+
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+ DRM_DEV_ERROR(pc->dev,
+ "do not support creating a drm_connector\n");
+ return -EINVAL;
+ }
+
+ if (!bridge->encoder) {
+ DRM_DEV_ERROR(pc->dev, "missing encoder\n");
+ return -ENODEV;
+ }
+
+ return drm_bridge_attach(bridge->encoder,
+ ch->next_bridge, bridge,
+ DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+}
+
+static void
+imx8qxp_pc_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ struct imx8qxp_pc_channel *ch = bridge->driver_private;
+ struct imx8qxp_pc *pc = ch->pc;
+ u32 val;
+ int ret;
+
+ ret = pm_runtime_get_sync(pc->dev);
+ if (ret < 0)
+ DRM_DEV_ERROR(pc->dev,
+ "failed to get runtime PM sync: %d\n", ret);
+
+ ret = clk_prepare_enable(pc->clk_apb);
+ if (ret)
+ DRM_DEV_ERROR(pc->dev, "%s: failed to enable apb clock: %d\n",
+ __func__, ret);
+
+ /* HSYNC to pixel link is active low. */
+ imx8qxp_pc_write_clr(pc, PC_CTRL_REG,
+ PC_DISP_HSYNC_POLARITY(ch->stream_id));
+
+ /* VSYNC to pixel link is active low. */
+ imx8qxp_pc_write_clr(pc, PC_CTRL_REG,
+ PC_DISP_VSYNC_POLARITY(ch->stream_id));
+
+ /* Data enable to pixel link is active high. */
+ imx8qxp_pc_write_set(pc, PC_CTRL_REG,
+ PC_DISP_DVALID_POLARITY(ch->stream_id));
+
+ /* Mask the first frame output which may be incomplete. */
+ imx8qxp_pc_write_set(pc, PC_CTRL_REG, PC_VSYNC_MASK_ENABLE);
+
+ /* Only support RGB currently. */
+ val = imx8qxp_pc_read(pc, PC_CTRL_REG);
+ if (ch->stream_id == 0) {
+ val &= ~PC_DISP0_PIX_DATA_FORMAT_MASK;
+ val |= PC_DISP0_PIX_DATA_FORMAT(RGB);
+ } else {
+ val &= ~PC_DISP1_PIX_DATA_FORMAT_MASK;
+ val |= PC_DISP1_PIX_DATA_FORMAT(RGB);
+ }
+ imx8qxp_pc_write(pc, PC_CTRL_REG, val);
+
+ /* Only support bypass mode currently. */
+ imx8qxp_pc_write_set(pc, PC_CTRL_REG, PC_DISP_BYPASS(ch->stream_id));
+
+ clk_disable_unprepare(pc->clk_apb);
+}
+
+static void
+imx8qxp_pc_bridge_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct imx8qxp_pc_channel *ch = bridge->driver_private;
+ struct imx8qxp_pc *pc = ch->pc;
+ int ret;
+
+ ret = pm_runtime_put(pc->dev);
+ if (ret < 0)
+ DRM_DEV_ERROR(pc->dev, "failed to put runtime PM: %d\n", ret);
+}
+
+static const u32 imx8qxp_pc_bus_output_fmts[] = {
+ MEDIA_BUS_FMT_RGB888_1X36_CPADLO,
+ MEDIA_BUS_FMT_RGB666_1X36_CPADLO,
+};
+
+static bool imx8qxp_pc_bus_output_fmt_supported(u32 fmt)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(imx8qxp_pc_bus_output_fmts); i++) {
+ if (imx8qxp_pc_bus_output_fmts[i] == fmt)
+ return true;
+ }
+
+ return false;
+}
+
+static u32 *
+imx8qxp_pc_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ u32 *input_fmts;
+
+ if (!imx8qxp_pc_bus_output_fmt_supported(output_fmt))
+ return NULL;
+
+ *num_input_fmts = 1;
+
+ input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ switch (output_fmt) {
+ case MEDIA_BUS_FMT_RGB888_1X36_CPADLO:
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X30_CPADLO;
+ break;
+ case MEDIA_BUS_FMT_RGB666_1X36_CPADLO:
+ input_fmts[0] = MEDIA_BUS_FMT_RGB666_1X30_CPADLO;
+ break;
+ default:
+ kfree(input_fmts);
+ input_fmts = NULL;
+ break;
+ }
+
+ return input_fmts;
+}
+
+static u32 *
+imx8qxp_pc_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ unsigned int *num_output_fmts)
+{
+ *num_output_fmts = ARRAY_SIZE(imx8qxp_pc_bus_output_fmts);
+ return kmemdup(imx8qxp_pc_bus_output_fmts,
+ sizeof(imx8qxp_pc_bus_output_fmts), GFP_KERNEL);
+}
+
+static const struct drm_bridge_funcs imx8qxp_pc_bridge_funcs = {
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .mode_valid = imx8qxp_pc_bridge_mode_valid,
+ .attach = imx8qxp_pc_bridge_attach,
+ .mode_set = imx8qxp_pc_bridge_mode_set,
+ .atomic_disable = imx8qxp_pc_bridge_atomic_disable,
+ .atomic_get_input_bus_fmts =
+ imx8qxp_pc_bridge_atomic_get_input_bus_fmts,
+ .atomic_get_output_bus_fmts =
+ imx8qxp_pc_bridge_atomic_get_output_bus_fmts,
+};
+
+static int imx8qxp_pc_bridge_probe(struct platform_device *pdev)
+{
+ struct imx8qxp_pc *pc;
+ struct imx8qxp_pc_channel *ch;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct device_node *child, *remote;
+ u32 i;
+ int ret;
+
+ pc = devm_kzalloc(dev, sizeof(*pc), GFP_KERNEL);
+ if (!pc)
+ return -ENOMEM;
+
+ pc->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(pc->base))
+ return PTR_ERR(pc->base);
+
+ pc->dev = dev;
+
+ pc->clk_apb = devm_clk_get(dev, "apb");
+ if (IS_ERR(pc->clk_apb)) {
+ ret = PTR_ERR(pc->clk_apb);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev, "failed to get apb clock: %d\n", ret);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, pc);
+ pm_runtime_enable(dev);
+
+ for_each_available_child_of_node(np, child) {
+ ret = of_property_read_u32(child, "reg", &i);
+ if (ret || i > 1) {
+ ret = -EINVAL;
+ DRM_DEV_ERROR(dev,
+ "invalid channel(%u) node address\n", i);
+ goto free_child;
+ }
+
+ ch = &pc->ch[i];
+ ch->pc = pc;
+ ch->stream_id = i;
+
+ remote = of_graph_get_remote_node(child, 1, 0);
+ if (!remote) {
+ ret = -ENODEV;
+ DRM_DEV_ERROR(dev,
+ "channel%u failed to get port1's remote node: %d\n",
+ i, ret);
+ goto free_child;
+ }
+
+ ch->next_bridge = of_drm_find_bridge(remote);
+ if (!ch->next_bridge) {
+ of_node_put(remote);
+ ret = -EPROBE_DEFER;
+ DRM_DEV_DEBUG_DRIVER(dev,
+ "channel%u failed to find next bridge: %d\n",
+ i, ret);
+ goto free_child;
+ }
+
+ of_node_put(remote);
+
+ ch->bridge.driver_private = ch;
+ ch->bridge.funcs = &imx8qxp_pc_bridge_funcs;
+ ch->bridge.of_node = child;
+ ch->is_available = true;
+
+ drm_bridge_add(&ch->bridge);
+ }
+
+ return 0;
+
+free_child:
+ of_node_put(child);
+
+ if (i == 1 && pc->ch[0].next_bridge)
+ drm_bridge_remove(&pc->ch[0].bridge);
+
+ pm_runtime_disable(dev);
+ return ret;
+}
+
+static int imx8qxp_pc_bridge_remove(struct platform_device *pdev)
+{
+ struct imx8qxp_pc *pc = platform_get_drvdata(pdev);
+ struct imx8qxp_pc_channel *ch;
+ int i;
+
+ for (i = 0; i < 2; i++) {
+ ch = &pc->ch[i];
+
+ if (!ch->is_available)
+ continue;
+
+ drm_bridge_remove(&ch->bridge);
+ ch->is_available = false;
+ }
+
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static int __maybe_unused imx8qxp_pc_runtime_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct imx8qxp_pc *pc = platform_get_drvdata(pdev);
+ int ret;
+
+ ret = clk_prepare_enable(pc->clk_apb);
+ if (ret)
+ DRM_DEV_ERROR(pc->dev, "%s: failed to enable apb clock: %d\n",
+ __func__, ret);
+
+ /* Disable pixel combiner by full reset. */
+ imx8qxp_pc_write_clr(pc, PC_SW_RESET_REG, PC_FULL_RESET_N);
+
+ clk_disable_unprepare(pc->clk_apb);
+
+ /* Ensure the reset takes effect. */
+ usleep_range(10, 20);
+
+ return ret;
+}
+
+static int __maybe_unused imx8qxp_pc_runtime_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct imx8qxp_pc *pc = platform_get_drvdata(pdev);
+ int ret;
+
+ ret = clk_prepare_enable(pc->clk_apb);
+ if (ret) {
+ DRM_DEV_ERROR(pc->dev, "%s: failed to enable apb clock: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ /* out of reset */
+ imx8qxp_pc_write_set(pc, PC_SW_RESET_REG, PC_FULL_RESET_N);
+
+ clk_disable_unprepare(pc->clk_apb);
+
+ return ret;
+}
+
+static const struct dev_pm_ops imx8qxp_pc_pm_ops = {
+ SET_RUNTIME_PM_OPS(imx8qxp_pc_runtime_suspend,
+ imx8qxp_pc_runtime_resume, NULL)
+};
+
+static const struct of_device_id imx8qxp_pc_dt_ids[] = {
+ { .compatible = "fsl,imx8qm-pixel-combiner", },
+ { .compatible = "fsl,imx8qxp-pixel-combiner", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx8qxp_pc_dt_ids);
+
+static struct platform_driver imx8qxp_pc_bridge_driver = {
+ .probe = imx8qxp_pc_bridge_probe,
+ .remove = imx8qxp_pc_bridge_remove,
+ .driver = {
+ .pm = &imx8qxp_pc_pm_ops,
+ .name = DRIVER_NAME,
+ .of_match_table = imx8qxp_pc_dt_ids,
+ },
+};
+module_platform_driver(imx8qxp_pc_bridge_driver);
+
+MODULE_DESCRIPTION("i.MX8QM/QXP pixel combiner bridge driver");
+MODULE_AUTHOR("Liu Ying <victor.liu@nxp.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c b/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
new file mode 100644
index 000000000..9e5f2b4dc
--- /dev/null
+++ b/drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
@@ -0,0 +1,430 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/*
+ * Copyright 2020,2022 NXP
+ */
+
+#include <linux/firmware/imx/svc/misc.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+
+#include <drm/drm_atomic_state_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_print.h>
+
+#include <dt-bindings/firmware/imx/rsrc.h>
+
+#define DRIVER_NAME "imx8qxp-display-pixel-link"
+#define PL_MAX_MST_ADDR 3
+#define PL_MAX_NEXT_BRIDGES 2
+
+struct imx8qxp_pixel_link {
+ struct drm_bridge bridge;
+ struct drm_bridge *next_bridge;
+ struct device *dev;
+ struct imx_sc_ipc *ipc_handle;
+ u8 stream_id;
+ u8 dc_id;
+ u32 sink_rsc;
+ u32 mst_addr;
+ u8 mst_addr_ctrl;
+ u8 mst_en_ctrl;
+ u8 mst_vld_ctrl;
+ u8 sync_ctrl;
+};
+
+static void imx8qxp_pixel_link_enable_mst_en(struct imx8qxp_pixel_link *pl)
+{
+ int ret;
+
+ ret = imx_sc_misc_set_control(pl->ipc_handle, pl->sink_rsc,
+ pl->mst_en_ctrl, true);
+ if (ret)
+ DRM_DEV_ERROR(pl->dev,
+ "failed to enable DC%u stream%u pixel link mst_en: %d\n",
+ pl->dc_id, pl->stream_id, ret);
+}
+
+static void imx8qxp_pixel_link_enable_mst_vld(struct imx8qxp_pixel_link *pl)
+{
+ int ret;
+
+ ret = imx_sc_misc_set_control(pl->ipc_handle, pl->sink_rsc,
+ pl->mst_vld_ctrl, true);
+ if (ret)
+ DRM_DEV_ERROR(pl->dev,
+ "failed to enable DC%u stream%u pixel link mst_vld: %d\n",
+ pl->dc_id, pl->stream_id, ret);
+}
+
+static void imx8qxp_pixel_link_enable_sync(struct imx8qxp_pixel_link *pl)
+{
+ int ret;
+
+ ret = imx_sc_misc_set_control(pl->ipc_handle, pl->sink_rsc,
+ pl->sync_ctrl, true);
+ if (ret)
+ DRM_DEV_ERROR(pl->dev,
+ "failed to enable DC%u stream%u pixel link sync: %d\n",
+ pl->dc_id, pl->stream_id, ret);
+}
+
+static int imx8qxp_pixel_link_disable_mst_en(struct imx8qxp_pixel_link *pl)
+{
+ int ret;
+
+ ret = imx_sc_misc_set_control(pl->ipc_handle, pl->sink_rsc,
+ pl->mst_en_ctrl, false);
+ if (ret)
+ DRM_DEV_ERROR(pl->dev,
+ "failed to disable DC%u stream%u pixel link mst_en: %d\n",
+ pl->dc_id, pl->stream_id, ret);
+
+ return ret;
+}
+
+static int imx8qxp_pixel_link_disable_mst_vld(struct imx8qxp_pixel_link *pl)
+{
+ int ret;
+
+ ret = imx_sc_misc_set_control(pl->ipc_handle, pl->sink_rsc,
+ pl->mst_vld_ctrl, false);
+ if (ret)
+ DRM_DEV_ERROR(pl->dev,
+ "failed to disable DC%u stream%u pixel link mst_vld: %d\n",
+ pl->dc_id, pl->stream_id, ret);
+
+ return ret;
+}
+
+static int imx8qxp_pixel_link_disable_sync(struct imx8qxp_pixel_link *pl)
+{
+ int ret;
+
+ ret = imx_sc_misc_set_control(pl->ipc_handle, pl->sink_rsc,
+ pl->sync_ctrl, false);
+ if (ret)
+ DRM_DEV_ERROR(pl->dev,
+ "failed to disable DC%u stream%u pixel link sync: %d\n",
+ pl->dc_id, pl->stream_id, ret);
+
+ return ret;
+}
+
+static void imx8qxp_pixel_link_set_mst_addr(struct imx8qxp_pixel_link *pl)
+{
+ int ret;
+
+ ret = imx_sc_misc_set_control(pl->ipc_handle,
+ pl->sink_rsc, pl->mst_addr_ctrl,
+ pl->mst_addr);
+ if (ret)
+ DRM_DEV_ERROR(pl->dev,
+ "failed to set DC%u stream%u pixel link mst addr(%u): %d\n",
+ pl->dc_id, pl->stream_id, pl->mst_addr, ret);
+}
+
+static int imx8qxp_pixel_link_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct imx8qxp_pixel_link *pl = bridge->driver_private;
+
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+ DRM_DEV_ERROR(pl->dev,
+ "do not support creating a drm_connector\n");
+ return -EINVAL;
+ }
+
+ if (!bridge->encoder) {
+ DRM_DEV_ERROR(pl->dev, "missing encoder\n");
+ return -ENODEV;
+ }
+
+ return drm_bridge_attach(bridge->encoder,
+ pl->next_bridge, bridge,
+ DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+}
+
+static void
+imx8qxp_pixel_link_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ struct imx8qxp_pixel_link *pl = bridge->driver_private;
+
+ imx8qxp_pixel_link_set_mst_addr(pl);
+}
+
+static void
+imx8qxp_pixel_link_bridge_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct imx8qxp_pixel_link *pl = bridge->driver_private;
+
+ imx8qxp_pixel_link_enable_mst_en(pl);
+ imx8qxp_pixel_link_enable_mst_vld(pl);
+ imx8qxp_pixel_link_enable_sync(pl);
+}
+
+static void
+imx8qxp_pixel_link_bridge_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct imx8qxp_pixel_link *pl = bridge->driver_private;
+
+ imx8qxp_pixel_link_disable_mst_en(pl);
+ imx8qxp_pixel_link_disable_mst_vld(pl);
+ imx8qxp_pixel_link_disable_sync(pl);
+}
+
+static const u32 imx8qxp_pixel_link_bus_output_fmts[] = {
+ MEDIA_BUS_FMT_RGB888_1X36_CPADLO,
+ MEDIA_BUS_FMT_RGB666_1X36_CPADLO,
+};
+
+static bool imx8qxp_pixel_link_bus_output_fmt_supported(u32 fmt)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(imx8qxp_pixel_link_bus_output_fmts); i++) {
+ if (imx8qxp_pixel_link_bus_output_fmts[i] == fmt)
+ return true;
+ }
+
+ return false;
+}
+
+static u32 *
+imx8qxp_pixel_link_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ u32 *input_fmts;
+
+ if (!imx8qxp_pixel_link_bus_output_fmt_supported(output_fmt))
+ return NULL;
+
+ *num_input_fmts = 1;
+
+ input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ input_fmts[0] = output_fmt;
+
+ return input_fmts;
+}
+
+static u32 *
+imx8qxp_pixel_link_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ unsigned int *num_output_fmts)
+{
+ *num_output_fmts = ARRAY_SIZE(imx8qxp_pixel_link_bus_output_fmts);
+ return kmemdup(imx8qxp_pixel_link_bus_output_fmts,
+ sizeof(imx8qxp_pixel_link_bus_output_fmts), GFP_KERNEL);
+}
+
+static const struct drm_bridge_funcs imx8qxp_pixel_link_bridge_funcs = {
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .attach = imx8qxp_pixel_link_bridge_attach,
+ .mode_set = imx8qxp_pixel_link_bridge_mode_set,
+ .atomic_enable = imx8qxp_pixel_link_bridge_atomic_enable,
+ .atomic_disable = imx8qxp_pixel_link_bridge_atomic_disable,
+ .atomic_get_input_bus_fmts =
+ imx8qxp_pixel_link_bridge_atomic_get_input_bus_fmts,
+ .atomic_get_output_bus_fmts =
+ imx8qxp_pixel_link_bridge_atomic_get_output_bus_fmts,
+};
+
+static int imx8qxp_pixel_link_disable_all_controls(struct imx8qxp_pixel_link *pl)
+{
+ int ret;
+
+ ret = imx8qxp_pixel_link_disable_mst_en(pl);
+ if (ret)
+ return ret;
+
+ ret = imx8qxp_pixel_link_disable_mst_vld(pl);
+ if (ret)
+ return ret;
+
+ return imx8qxp_pixel_link_disable_sync(pl);
+}
+
+static struct drm_bridge *
+imx8qxp_pixel_link_find_next_bridge(struct imx8qxp_pixel_link *pl)
+{
+ struct device_node *np = pl->dev->of_node;
+ struct device_node *port, *remote;
+ struct drm_bridge *next_bridge[PL_MAX_NEXT_BRIDGES];
+ u32 port_id;
+ bool found_port = false;
+ int reg, ep_cnt = 0;
+ /* select the first next bridge by default */
+ int bridge_sel = 0;
+
+ for (port_id = 1; port_id <= PL_MAX_MST_ADDR + 1; port_id++) {
+ port = of_graph_get_port_by_id(np, port_id);
+ if (!port)
+ continue;
+
+ if (of_device_is_available(port)) {
+ found_port = true;
+ of_node_put(port);
+ break;
+ }
+
+ of_node_put(port);
+ }
+
+ if (!found_port) {
+ DRM_DEV_ERROR(pl->dev, "no available output port\n");
+ return ERR_PTR(-ENODEV);
+ }
+
+ for (reg = 0; reg < PL_MAX_NEXT_BRIDGES; reg++) {
+ remote = of_graph_get_remote_node(np, port_id, reg);
+ if (!remote)
+ continue;
+
+ if (!of_device_is_available(remote->parent)) {
+ DRM_DEV_DEBUG(pl->dev,
+ "port%u endpoint%u remote parent is not available\n",
+ port_id, reg);
+ of_node_put(remote);
+ continue;
+ }
+
+ next_bridge[ep_cnt] = of_drm_find_bridge(remote);
+ if (!next_bridge[ep_cnt]) {
+ of_node_put(remote);
+ return ERR_PTR(-EPROBE_DEFER);
+ }
+
+ /* specially select the next bridge with companion PXL2DPI */
+ if (of_find_property(remote, "fsl,companion-pxl2dpi", NULL))
+ bridge_sel = ep_cnt;
+
+ ep_cnt++;
+
+ of_node_put(remote);
+ }
+
+ pl->mst_addr = port_id - 1;
+
+ return next_bridge[bridge_sel];
+}
+
+static int imx8qxp_pixel_link_bridge_probe(struct platform_device *pdev)
+{
+ struct imx8qxp_pixel_link *pl;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ int ret;
+
+ pl = devm_kzalloc(dev, sizeof(*pl), GFP_KERNEL);
+ if (!pl)
+ return -ENOMEM;
+
+ ret = imx_scu_get_handle(&pl->ipc_handle);
+ if (ret) {
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev, "failed to get SCU ipc handle: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = of_property_read_u8(np, "fsl,dc-id", &pl->dc_id);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "failed to get DC index: %d\n", ret);
+ return ret;
+ }
+
+ ret = of_property_read_u8(np, "fsl,dc-stream-id", &pl->stream_id);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "failed to get DC stream index: %d\n", ret);
+ return ret;
+ }
+
+ pl->dev = dev;
+
+ pl->sink_rsc = pl->dc_id ? IMX_SC_R_DC_1 : IMX_SC_R_DC_0;
+
+ if (pl->stream_id == 0) {
+ pl->mst_addr_ctrl = IMX_SC_C_PXL_LINK_MST1_ADDR;
+ pl->mst_en_ctrl = IMX_SC_C_PXL_LINK_MST1_ENB;
+ pl->mst_vld_ctrl = IMX_SC_C_PXL_LINK_MST1_VLD;
+ pl->sync_ctrl = IMX_SC_C_SYNC_CTRL0;
+ } else {
+ pl->mst_addr_ctrl = IMX_SC_C_PXL_LINK_MST2_ADDR;
+ pl->mst_en_ctrl = IMX_SC_C_PXL_LINK_MST2_ENB;
+ pl->mst_vld_ctrl = IMX_SC_C_PXL_LINK_MST2_VLD;
+ pl->sync_ctrl = IMX_SC_C_SYNC_CTRL1;
+ }
+
+ /* disable all controls to POR default */
+ ret = imx8qxp_pixel_link_disable_all_controls(pl);
+ if (ret)
+ return ret;
+
+ pl->next_bridge = imx8qxp_pixel_link_find_next_bridge(pl);
+ if (IS_ERR(pl->next_bridge)) {
+ ret = PTR_ERR(pl->next_bridge);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev, "failed to find next bridge: %d\n",
+ ret);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, pl);
+
+ pl->bridge.driver_private = pl;
+ pl->bridge.funcs = &imx8qxp_pixel_link_bridge_funcs;
+ pl->bridge.of_node = np;
+
+ drm_bridge_add(&pl->bridge);
+
+ return ret;
+}
+
+static int imx8qxp_pixel_link_bridge_remove(struct platform_device *pdev)
+{
+ struct imx8qxp_pixel_link *pl = platform_get_drvdata(pdev);
+
+ drm_bridge_remove(&pl->bridge);
+
+ return 0;
+}
+
+static const struct of_device_id imx8qxp_pixel_link_dt_ids[] = {
+ { .compatible = "fsl,imx8qm-dc-pixel-link", },
+ { .compatible = "fsl,imx8qxp-dc-pixel-link", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx8qxp_pixel_link_dt_ids);
+
+static struct platform_driver imx8qxp_pixel_link_bridge_driver = {
+ .probe = imx8qxp_pixel_link_bridge_probe,
+ .remove = imx8qxp_pixel_link_bridge_remove,
+ .driver = {
+ .of_match_table = imx8qxp_pixel_link_dt_ids,
+ .name = DRIVER_NAME,
+ },
+};
+module_platform_driver(imx8qxp_pixel_link_bridge_driver);
+
+MODULE_DESCRIPTION("i.MX8QXP/QM display pixel link bridge driver");
+MODULE_AUTHOR("Liu Ying <victor.liu@nxp.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c b/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c
new file mode 100644
index 000000000..d0fec82f0
--- /dev/null
+++ b/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c
@@ -0,0 +1,488 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/*
+ * Copyright 2020 NXP
+ */
+
+#include <linux/firmware/imx/svc/misc.h>
+#include <linux/media-bus-format.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+
+#include <drm/drm_atomic_state_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_of.h>
+#include <drm/drm_print.h>
+
+#include <dt-bindings/firmware/imx/rsrc.h>
+
+#define PXL2DPI_CTRL 0x40
+#define CFG1_16BIT 0x0
+#define CFG2_16BIT 0x1
+#define CFG3_16BIT 0x2
+#define CFG1_18BIT 0x3
+#define CFG2_18BIT 0x4
+#define CFG_24BIT 0x5
+
+#define DRIVER_NAME "imx8qxp-pxl2dpi"
+
+struct imx8qxp_pxl2dpi {
+ struct regmap *regmap;
+ struct drm_bridge bridge;
+ struct drm_bridge *next_bridge;
+ struct drm_bridge *companion;
+ struct device *dev;
+ struct imx_sc_ipc *ipc_handle;
+ u32 sc_resource;
+ u32 in_bus_format;
+ u32 out_bus_format;
+ u32 pl_sel;
+};
+
+#define bridge_to_p2d(b) container_of(b, struct imx8qxp_pxl2dpi, bridge)
+
+static int imx8qxp_pxl2dpi_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct imx8qxp_pxl2dpi *p2d = bridge->driver_private;
+
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+ DRM_DEV_ERROR(p2d->dev,
+ "do not support creating a drm_connector\n");
+ return -EINVAL;
+ }
+
+ if (!bridge->encoder) {
+ DRM_DEV_ERROR(p2d->dev, "missing encoder\n");
+ return -ENODEV;
+ }
+
+ return drm_bridge_attach(bridge->encoder,
+ p2d->next_bridge, bridge,
+ DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+}
+
+static int
+imx8qxp_pxl2dpi_bridge_atomic_check(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct imx8qxp_pxl2dpi *p2d = bridge->driver_private;
+
+ p2d->in_bus_format = bridge_state->input_bus_cfg.format;
+ p2d->out_bus_format = bridge_state->output_bus_cfg.format;
+
+ return 0;
+}
+
+static void
+imx8qxp_pxl2dpi_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ struct imx8qxp_pxl2dpi *p2d = bridge->driver_private;
+ struct imx8qxp_pxl2dpi *companion_p2d;
+ int ret;
+
+ ret = pm_runtime_get_sync(p2d->dev);
+ if (ret < 0)
+ DRM_DEV_ERROR(p2d->dev,
+ "failed to get runtime PM sync: %d\n", ret);
+
+ ret = imx_sc_misc_set_control(p2d->ipc_handle, p2d->sc_resource,
+ IMX_SC_C_PXL_LINK_SEL, p2d->pl_sel);
+ if (ret)
+ DRM_DEV_ERROR(p2d->dev,
+ "failed to set pixel link selection(%u): %d\n",
+ p2d->pl_sel, ret);
+
+ switch (p2d->out_bus_format) {
+ case MEDIA_BUS_FMT_RGB888_1X24:
+ regmap_write(p2d->regmap, PXL2DPI_CTRL, CFG_24BIT);
+ break;
+ case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
+ regmap_write(p2d->regmap, PXL2DPI_CTRL, CFG2_18BIT);
+ break;
+ default:
+ DRM_DEV_ERROR(p2d->dev,
+ "unsupported output bus format 0x%08x\n",
+ p2d->out_bus_format);
+ }
+
+ if (p2d->companion) {
+ companion_p2d = bridge_to_p2d(p2d->companion);
+
+ companion_p2d->in_bus_format = p2d->in_bus_format;
+ companion_p2d->out_bus_format = p2d->out_bus_format;
+
+ p2d->companion->funcs->mode_set(p2d->companion, mode,
+ adjusted_mode);
+ }
+}
+
+static void
+imx8qxp_pxl2dpi_bridge_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct imx8qxp_pxl2dpi *p2d = bridge->driver_private;
+ int ret;
+
+ ret = pm_runtime_put(p2d->dev);
+ if (ret < 0)
+ DRM_DEV_ERROR(p2d->dev, "failed to put runtime PM: %d\n", ret);
+
+ if (p2d->companion)
+ p2d->companion->funcs->atomic_disable(p2d->companion,
+ old_bridge_state);
+}
+
+static const u32 imx8qxp_pxl2dpi_bus_output_fmts[] = {
+ MEDIA_BUS_FMT_RGB888_1X24,
+ MEDIA_BUS_FMT_RGB666_1X24_CPADHI,
+};
+
+static bool imx8qxp_pxl2dpi_bus_output_fmt_supported(u32 fmt)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(imx8qxp_pxl2dpi_bus_output_fmts); i++) {
+ if (imx8qxp_pxl2dpi_bus_output_fmts[i] == fmt)
+ return true;
+ }
+
+ return false;
+}
+
+static u32 *
+imx8qxp_pxl2dpi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ u32 *input_fmts;
+
+ if (!imx8qxp_pxl2dpi_bus_output_fmt_supported(output_fmt))
+ return NULL;
+
+ *num_input_fmts = 1;
+
+ input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ switch (output_fmt) {
+ case MEDIA_BUS_FMT_RGB888_1X24:
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X36_CPADLO;
+ break;
+ case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
+ input_fmts[0] = MEDIA_BUS_FMT_RGB666_1X36_CPADLO;
+ break;
+ default:
+ kfree(input_fmts);
+ input_fmts = NULL;
+ break;
+ }
+
+ return input_fmts;
+}
+
+static u32 *
+imx8qxp_pxl2dpi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ unsigned int *num_output_fmts)
+{
+ *num_output_fmts = ARRAY_SIZE(imx8qxp_pxl2dpi_bus_output_fmts);
+ return kmemdup(imx8qxp_pxl2dpi_bus_output_fmts,
+ sizeof(imx8qxp_pxl2dpi_bus_output_fmts), GFP_KERNEL);
+}
+
+static const struct drm_bridge_funcs imx8qxp_pxl2dpi_bridge_funcs = {
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .attach = imx8qxp_pxl2dpi_bridge_attach,
+ .atomic_check = imx8qxp_pxl2dpi_bridge_atomic_check,
+ .mode_set = imx8qxp_pxl2dpi_bridge_mode_set,
+ .atomic_disable = imx8qxp_pxl2dpi_bridge_atomic_disable,
+ .atomic_get_input_bus_fmts =
+ imx8qxp_pxl2dpi_bridge_atomic_get_input_bus_fmts,
+ .atomic_get_output_bus_fmts =
+ imx8qxp_pxl2dpi_bridge_atomic_get_output_bus_fmts,
+};
+
+static struct device_node *
+imx8qxp_pxl2dpi_get_available_ep_from_port(struct imx8qxp_pxl2dpi *p2d,
+ u32 port_id)
+{
+ struct device_node *port, *ep;
+ int ep_cnt;
+
+ port = of_graph_get_port_by_id(p2d->dev->of_node, port_id);
+ if (!port) {
+ DRM_DEV_ERROR(p2d->dev, "failed to get port@%u\n", port_id);
+ return ERR_PTR(-ENODEV);
+ }
+
+ ep_cnt = of_get_available_child_count(port);
+ if (ep_cnt == 0) {
+ DRM_DEV_ERROR(p2d->dev, "no available endpoints of port@%u\n",
+ port_id);
+ ep = ERR_PTR(-ENODEV);
+ goto out;
+ } else if (ep_cnt > 1) {
+ DRM_DEV_ERROR(p2d->dev,
+ "invalid available endpoints of port@%u\n",
+ port_id);
+ ep = ERR_PTR(-EINVAL);
+ goto out;
+ }
+
+ ep = of_get_next_available_child(port, NULL);
+ if (!ep) {
+ DRM_DEV_ERROR(p2d->dev,
+ "failed to get available endpoint of port@%u\n",
+ port_id);
+ ep = ERR_PTR(-ENODEV);
+ goto out;
+ }
+out:
+ of_node_put(port);
+ return ep;
+}
+
+static struct drm_bridge *
+imx8qxp_pxl2dpi_find_next_bridge(struct imx8qxp_pxl2dpi *p2d)
+{
+ struct device_node *ep, *remote;
+ struct drm_bridge *next_bridge;
+ int ret;
+
+ ep = imx8qxp_pxl2dpi_get_available_ep_from_port(p2d, 1);
+ if (IS_ERR(ep)) {
+ ret = PTR_ERR(ep);
+ return ERR_PTR(ret);
+ }
+
+ remote = of_graph_get_remote_port_parent(ep);
+ if (!remote || !of_device_is_available(remote)) {
+ DRM_DEV_ERROR(p2d->dev, "no available remote\n");
+ next_bridge = ERR_PTR(-ENODEV);
+ goto out;
+ } else if (!of_device_is_available(remote->parent)) {
+ DRM_DEV_ERROR(p2d->dev, "remote parent is not available\n");
+ next_bridge = ERR_PTR(-ENODEV);
+ goto out;
+ }
+
+ next_bridge = of_drm_find_bridge(remote);
+ if (!next_bridge) {
+ next_bridge = ERR_PTR(-EPROBE_DEFER);
+ goto out;
+ }
+out:
+ of_node_put(remote);
+ of_node_put(ep);
+
+ return next_bridge;
+}
+
+static int imx8qxp_pxl2dpi_set_pixel_link_sel(struct imx8qxp_pxl2dpi *p2d)
+{
+ struct device_node *ep;
+ struct of_endpoint endpoint;
+ int ret;
+
+ ep = imx8qxp_pxl2dpi_get_available_ep_from_port(p2d, 0);
+ if (IS_ERR(ep))
+ return PTR_ERR(ep);
+
+ ret = of_graph_parse_endpoint(ep, &endpoint);
+ if (ret) {
+ DRM_DEV_ERROR(p2d->dev,
+ "failed to parse endpoint of port@0: %d\n", ret);
+ goto out;
+ }
+
+ p2d->pl_sel = endpoint.id;
+out:
+ of_node_put(ep);
+
+ return ret;
+}
+
+static int imx8qxp_pxl2dpi_parse_dt_companion(struct imx8qxp_pxl2dpi *p2d)
+{
+ struct imx8qxp_pxl2dpi *companion_p2d;
+ struct device *dev = p2d->dev;
+ struct device_node *companion;
+ struct device_node *port1, *port2;
+ const struct of_device_id *match;
+ int dual_link;
+ int ret = 0;
+
+ /* Locate the companion PXL2DPI for dual-link operation, if any. */
+ companion = of_parse_phandle(dev->of_node, "fsl,companion-pxl2dpi", 0);
+ if (!companion)
+ return 0;
+
+ if (!of_device_is_available(companion)) {
+ DRM_DEV_ERROR(dev, "companion PXL2DPI is not available\n");
+ ret = -ENODEV;
+ goto out;
+ }
+
+ /*
+ * Sanity check: the companion bridge must have the same compatible
+ * string.
+ */
+ match = of_match_device(dev->driver->of_match_table, dev);
+ if (!of_device_is_compatible(companion, match->compatible)) {
+ DRM_DEV_ERROR(dev, "companion PXL2DPI is incompatible\n");
+ ret = -ENXIO;
+ goto out;
+ }
+
+ p2d->companion = of_drm_find_bridge(companion);
+ if (!p2d->companion) {
+ ret = -EPROBE_DEFER;
+ DRM_DEV_DEBUG_DRIVER(p2d->dev,
+ "failed to find companion bridge: %d\n",
+ ret);
+ goto out;
+ }
+
+ companion_p2d = bridge_to_p2d(p2d->companion);
+
+ /*
+ * We need to work out if the sink is expecting us to function in
+ * dual-link mode. We do this by looking at the DT port nodes that
+ * the next bridges are connected to. If they are marked as expecting
+ * even pixels and odd pixels than we need to use the companion PXL2DPI.
+ */
+ port1 = of_graph_get_port_by_id(p2d->next_bridge->of_node, 1);
+ port2 = of_graph_get_port_by_id(companion_p2d->next_bridge->of_node, 1);
+ dual_link = drm_of_lvds_get_dual_link_pixel_order(port1, port2);
+ of_node_put(port1);
+ of_node_put(port2);
+
+ if (dual_link < 0) {
+ ret = dual_link;
+ DRM_DEV_ERROR(dev, "failed to get dual link pixel order: %d\n",
+ ret);
+ goto out;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev,
+ "dual-link configuration detected (companion bridge %pOF)\n",
+ companion);
+out:
+ of_node_put(companion);
+ return ret;
+}
+
+static int imx8qxp_pxl2dpi_bridge_probe(struct platform_device *pdev)
+{
+ struct imx8qxp_pxl2dpi *p2d;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ int ret;
+
+ p2d = devm_kzalloc(dev, sizeof(*p2d), GFP_KERNEL);
+ if (!p2d)
+ return -ENOMEM;
+
+ p2d->regmap = syscon_node_to_regmap(np->parent);
+ if (IS_ERR(p2d->regmap)) {
+ ret = PTR_ERR(p2d->regmap);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev, "failed to get regmap: %d\n", ret);
+ return ret;
+ }
+
+ ret = imx_scu_get_handle(&p2d->ipc_handle);
+ if (ret) {
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev, "failed to get SCU ipc handle: %d\n",
+ ret);
+ return ret;
+ }
+
+ p2d->dev = dev;
+
+ ret = of_property_read_u32(np, "fsl,sc-resource", &p2d->sc_resource);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "failed to get SC resource %d\n", ret);
+ return ret;
+ }
+
+ p2d->next_bridge = imx8qxp_pxl2dpi_find_next_bridge(p2d);
+ if (IS_ERR(p2d->next_bridge)) {
+ ret = PTR_ERR(p2d->next_bridge);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dev, "failed to find next bridge: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = imx8qxp_pxl2dpi_set_pixel_link_sel(p2d);
+ if (ret)
+ return ret;
+
+ ret = imx8qxp_pxl2dpi_parse_dt_companion(p2d);
+ if (ret)
+ return ret;
+
+ platform_set_drvdata(pdev, p2d);
+ pm_runtime_enable(dev);
+
+ p2d->bridge.driver_private = p2d;
+ p2d->bridge.funcs = &imx8qxp_pxl2dpi_bridge_funcs;
+ p2d->bridge.of_node = np;
+
+ drm_bridge_add(&p2d->bridge);
+
+ return ret;
+}
+
+static int imx8qxp_pxl2dpi_bridge_remove(struct platform_device *pdev)
+{
+ struct imx8qxp_pxl2dpi *p2d = platform_get_drvdata(pdev);
+
+ drm_bridge_remove(&p2d->bridge);
+
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static const struct of_device_id imx8qxp_pxl2dpi_dt_ids[] = {
+ { .compatible = "fsl,imx8qxp-pxl2dpi", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx8qxp_pxl2dpi_dt_ids);
+
+static struct platform_driver imx8qxp_pxl2dpi_bridge_driver = {
+ .probe = imx8qxp_pxl2dpi_bridge_probe,
+ .remove = imx8qxp_pxl2dpi_bridge_remove,
+ .driver = {
+ .of_match_table = imx8qxp_pxl2dpi_dt_ids,
+ .name = DRIVER_NAME,
+ },
+};
+module_platform_driver(imx8qxp_pxl2dpi_bridge_driver);
+
+MODULE_DESCRIPTION("i.MX8QXP pixel link to DPI bridge driver");
+MODULE_AUTHOR("Liu Ying <victor.liu@nxp.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
new file mode 100644
index 000000000..292c4f6da
--- /dev/null
+++ b/drivers/gpu/drm/bridge/ite-it6505.c
@@ -0,0 +1,3369 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/*
+ * Copyright (c) 2020, The Linux Foundation. All rights reserved.
+ */
+#include <linux/bits.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/extcon.h>
+#include <linux/fs.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/types.h>
+#include <linux/wait.h>
+
+#include <crypto/hash.h>
+
+#include <drm/display/drm_dp_helper.h>
+#include <drm/display/drm_hdcp_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include <sound/hdmi-codec.h>
+
+#define REG_IC_VER 0x04
+
+#define REG_RESET_CTRL 0x05
+#define VIDEO_RESET BIT(0)
+#define AUDIO_RESET BIT(1)
+#define ALL_LOGIC_RESET BIT(2)
+#define AUX_RESET BIT(3)
+#define HDCP_RESET BIT(4)
+
+#define INT_STATUS_01 0x06
+#define INT_MASK_01 0x09
+#define INT_HPD_CHANGE 0
+#define INT_RECEIVE_HPD_IRQ 1
+#define INT_SCDT_CHANGE 2
+#define INT_HDCP_FAIL 3
+#define INT_HDCP_DONE 4
+#define BIT_OFFSET(x) (((x) - INT_STATUS_01) * BITS_PER_BYTE)
+#define BIT_INT_HPD INT_HPD_CHANGE
+#define BIT_INT_HPD_IRQ INT_RECEIVE_HPD_IRQ
+#define BIT_INT_SCDT INT_SCDT_CHANGE
+#define BIT_INT_HDCP_FAIL INT_HDCP_FAIL
+#define BIT_INT_HDCP_DONE INT_HDCP_DONE
+
+#define INT_STATUS_02 0x07
+#define INT_MASK_02 0x0A
+#define INT_AUX_CMD_FAIL 0
+#define INT_HDCP_KSV_CHECK 1
+#define INT_AUDIO_FIFO_ERROR 2
+#define BIT_INT_AUX_CMD_FAIL (BIT_OFFSET(0x07) + INT_AUX_CMD_FAIL)
+#define BIT_INT_HDCP_KSV_CHECK (BIT_OFFSET(0x07) + INT_HDCP_KSV_CHECK)
+#define BIT_INT_AUDIO_FIFO_ERROR (BIT_OFFSET(0x07) + INT_AUDIO_FIFO_ERROR)
+
+#define INT_STATUS_03 0x08
+#define INT_MASK_03 0x0B
+#define INT_LINK_TRAIN_FAIL 4
+#define INT_VID_FIFO_ERROR 5
+#define INT_IO_LATCH_FIFO_OVERFLOW 7
+#define BIT_INT_LINK_TRAIN_FAIL (BIT_OFFSET(0x08) + INT_LINK_TRAIN_FAIL)
+#define BIT_INT_VID_FIFO_ERROR (BIT_OFFSET(0x08) + INT_VID_FIFO_ERROR)
+#define BIT_INT_IO_FIFO_OVERFLOW (BIT_OFFSET(0x08) + INT_IO_LATCH_FIFO_OVERFLOW)
+
+#define REG_SYSTEM_STS 0x0D
+#define INT_STS BIT(0)
+#define HPD_STS BIT(1)
+#define VIDEO_STB BIT(2)
+
+#define REG_LINK_TRAIN_STS 0x0E
+#define LINK_STATE_CR BIT(2)
+#define LINK_STATE_EQ BIT(3)
+#define LINK_STATE_NORP BIT(4)
+
+#define REG_BANK_SEL 0x0F
+#define REG_CLK_CTRL0 0x10
+#define M_PCLK_DELAY 0x03
+
+#define REG_AUX_OPT 0x11
+#define AUX_AUTO_RST BIT(0)
+#define AUX_FIX_FREQ BIT(3)
+
+#define REG_DATA_CTRL0 0x12
+#define VIDEO_LATCH_EDGE BIT(4)
+#define ENABLE_PCLK_COUNTER BIT(7)
+
+#define REG_PCLK_COUNTER_VALUE 0x13
+
+#define REG_501_FIFO_CTRL 0x15
+#define RST_501_FIFO BIT(1)
+
+#define REG_TRAIN_CTRL0 0x16
+#define FORCE_LBR BIT(0)
+#define LANE_COUNT_MASK 0x06
+#define LANE_SWAP BIT(3)
+#define SPREAD_AMP_5 BIT(4)
+#define FORCE_CR_DONE BIT(5)
+#define FORCE_EQ_DONE BIT(6)
+
+#define REG_TRAIN_CTRL1 0x17
+#define AUTO_TRAIN BIT(0)
+#define MANUAL_TRAIN BIT(1)
+#define FORCE_RETRAIN BIT(2)
+
+#define REG_AUX_CTRL 0x23
+#define CLR_EDID_FIFO BIT(0)
+#define AUX_USER_MODE BIT(1)
+#define AUX_NO_SEGMENT_WR BIT(6)
+#define AUX_EN_FIFO_READ BIT(7)
+
+#define REG_AUX_ADR_0_7 0x24
+#define REG_AUX_ADR_8_15 0x25
+#define REG_AUX_ADR_16_19 0x26
+#define REG_AUX_OUT_DATA0 0x27
+
+#define REG_AUX_CMD_REQ 0x2B
+#define AUX_BUSY BIT(5)
+
+#define REG_AUX_DATA_0_7 0x2C
+#define REG_AUX_DATA_8_15 0x2D
+#define REG_AUX_DATA_16_23 0x2E
+#define REG_AUX_DATA_24_31 0x2F
+
+#define REG_AUX_DATA_FIFO 0x2F
+
+#define REG_AUX_ERROR_STS 0x9F
+#define M_AUX_REQ_FAIL 0x03
+
+#define REG_HDCP_CTRL1 0x38
+#define HDCP_CP_ENABLE BIT(0)
+
+#define REG_HDCP_TRIGGER 0x39
+#define HDCP_TRIGGER_START BIT(0)
+#define HDCP_TRIGGER_CPIRQ BIT(1)
+#define HDCP_TRIGGER_KSV_DONE BIT(4)
+#define HDCP_TRIGGER_KSV_FAIL BIT(5)
+
+#define REG_HDCP_CTRL2 0x3A
+#define HDCP_AN_SEL BIT(0)
+#define HDCP_AN_GEN BIT(1)
+#define HDCP_HW_HPDIRQ_ACT BIT(2)
+#define HDCP_EN_M0_READ BIT(5)
+
+#define REG_M0_0_7 0x4C
+#define REG_AN_0_7 0x4C
+#define REG_SP_CTRL0 0x58
+#define REG_IP_CTRL1 0x59
+#define REG_IP_CTRL2 0x5A
+
+#define REG_LINK_DRV 0x5C
+#define DRV_HS BIT(1)
+
+#define REG_DRV_LN_DATA_SEL 0x5D
+
+#define REG_AUX 0x5E
+
+#define REG_VID_BUS_CTRL0 0x60
+#define IN_DDR BIT(2)
+#define DDR_CD (0x01 << 6)
+
+#define REG_VID_BUS_CTRL1 0x61
+#define TX_FIFO_RESET BIT(1)
+
+#define REG_INPUT_CTRL 0xA0
+#define INPUT_HSYNC_POL BIT(0)
+#define INPUT_VSYNC_POL BIT(2)
+#define INPUT_INTERLACED BIT(4)
+
+#define REG_INPUT_HTOTAL 0xA1
+#define REG_INPUT_HACTIVE_START 0xA3
+#define REG_INPUT_HACTIVE_WIDTH 0xA5
+#define REG_INPUT_HFRONT_PORCH 0xA7
+#define REG_INPUT_HSYNC_WIDTH 0xA9
+#define REG_INPUT_VTOTAL 0xAB
+#define REG_INPUT_VACTIVE_START 0xAD
+#define REG_INPUT_VACTIVE_WIDTH 0xAF
+#define REG_INPUT_VFRONT_PORCH 0xB1
+#define REG_INPUT_VSYNC_WIDTH 0xB3
+
+#define REG_AUDIO_SRC_CTRL 0xB8
+#define M_AUDIO_I2S_EN 0x0F
+#define EN_I2S0 BIT(0)
+#define EN_I2S1 BIT(1)
+#define EN_I2S2 BIT(2)
+#define EN_I2S3 BIT(3)
+#define AUDIO_FIFO_RESET BIT(7)
+
+#define REG_AUDIO_FMT 0xB9
+#define REG_AUDIO_FIFO_SEL 0xBA
+
+#define REG_AUDIO_CTRL0 0xBB
+#define AUDIO_FULL_PKT BIT(4)
+#define AUDIO_16B_BOUND BIT(5)
+
+#define REG_AUDIO_CTRL1 0xBC
+#define REG_AUDIO_INPUT_FREQ 0xBE
+
+#define REG_IEC958_STS0 0xBF
+#define REG_IEC958_STS1 0xC0
+#define REG_IEC958_STS2 0xC1
+#define REG_IEC958_STS3 0xC2
+#define REG_IEC958_STS4 0xC3
+
+#define REG_HPD_IRQ_TIME 0xC9
+#define REG_AUX_DEBUG_MODE 0xCA
+#define REG_AUX_OPT2 0xCB
+#define REG_HDCP_OPT 0xCE
+#define REG_USER_DRV_PRE 0xCF
+
+#define REG_DATA_MUTE_CTRL 0xD3
+#define ENABLE_ENHANCED_FRAME BIT(0)
+#define ENABLE_AUTO_VIDEO_FIFO_RESET BIT(1)
+#define EN_VID_MUTE BIT(4)
+#define EN_AUD_MUTE BIT(5)
+
+#define REG_TIME_STMP_CTRL 0xD4
+#define EN_ENHANCE_VID_STMP BIT(0)
+#define EN_ENHANCE_AUD_STMP BIT(2)
+#define M_STAMP_STEP 0x30
+#define EN_SSC_GAT BIT(6)
+
+#define REG_INFOFRAME_CTRL 0xE8
+#define EN_AVI_PKT BIT(0)
+#define EN_AUD_PKT BIT(1)
+#define EN_MPG_PKT BIT(2)
+#define EN_GEN_PKT BIT(3)
+#define EN_VID_TIME_STMP BIT(4)
+#define EN_AUD_TIME_STMP BIT(5)
+#define EN_VID_CTRL_PKT (EN_AVI_PKT | EN_VID_TIME_STMP)
+#define EN_AUD_CTRL_PKT (EN_AUD_PKT | EN_AUD_TIME_STMP)
+
+#define REG_AUDIO_N_0_7 0xDE
+#define REG_AUDIO_N_8_15 0xDF
+#define REG_AUDIO_N_16_23 0xE0
+
+#define REG_AVI_INFO_DB1 0xE9
+#define REG_AVI_INFO_DB2 0xEA
+#define REG_AVI_INFO_DB3 0xEB
+#define REG_AVI_INFO_DB4 0xEC
+#define REG_AVI_INFO_DB5 0xED
+#define REG_AVI_INFO_SUM 0xF6
+
+#define REG_AUD_INFOFRAM_DB1 0xF7
+#define REG_AUD_INFOFRAM_DB2 0xF8
+#define REG_AUD_INFOFRAM_DB3 0xF9
+#define REG_AUD_INFOFRAM_DB4 0xFA
+#define REG_AUD_INFOFRAM_SUM 0xFB
+
+/* the following six registers are in bank1 */
+#define REG_DRV_0_DB_800_MV 0x7E
+#define REG_PRE_0_DB_800_MV 0x7F
+#define REG_PRE_3P5_DB_800_MV 0x81
+#define REG_SSC_CTRL0 0x88
+#define REG_SSC_CTRL1 0x89
+#define REG_SSC_CTRL2 0x8A
+
+#define RBR DP_LINK_BW_1_62
+#define HBR DP_LINK_BW_2_7
+#define HBR2 DP_LINK_BW_5_4
+#define HBR3 DP_LINK_BW_8_1
+
+#define DPCD_V_1_1 0x11
+#define MISC_VERB 0xF0
+#define MISC_VERC 0x70
+#define I2S_INPUT_FORMAT_STANDARD 0
+#define I2S_INPUT_FORMAT_32BIT 1
+#define I2S_INPUT_LEFT_JUSTIFIED 0
+#define I2S_INPUT_RIGHT_JUSTIFIED 1
+#define I2S_DATA_1T_DELAY 0
+#define I2S_DATA_NO_DELAY 1
+#define I2S_WS_LEFT_CHANNEL 0
+#define I2S_WS_RIGHT_CHANNEL 1
+#define I2S_DATA_MSB_FIRST 0
+#define I2S_DATA_LSB_FIRST 1
+#define WORD_LENGTH_16BIT 0
+#define WORD_LENGTH_18BIT 1
+#define WORD_LENGTH_20BIT 2
+#define WORD_LENGTH_24BIT 3
+#define DEBUGFS_DIR_NAME "it6505-debugfs"
+#define READ_BUFFER_SIZE 400
+
+/* Vendor option */
+#define HDCP_DESIRED 1
+#define MAX_LANE_COUNT 4
+#define MAX_LINK_RATE HBR
+#define AUTO_TRAIN_RETRY 3
+#define MAX_HDCP_DOWN_STREAM_COUNT 10
+#define MAX_CR_LEVEL 0x03
+#define MAX_EQ_LEVEL 0x03
+#define AUX_WAIT_TIMEOUT_MS 15
+#define AUX_FIFO_MAX_SIZE 32
+#define PIXEL_CLK_DELAY 1
+#define PIXEL_CLK_INVERSE 0
+#define ADJUST_PHASE_THRESHOLD 80000
+#define DPI_PIXEL_CLK_MAX 95000
+#define HDCP_SHA1_FIFO_LEN (MAX_HDCP_DOWN_STREAM_COUNT * 5 + 10)
+#define DEFAULT_PWR_ON 0
+#define DEFAULT_DRV_HOLD 0
+
+#define AUDIO_SELECT I2S
+#define AUDIO_TYPE LPCM
+#define AUDIO_SAMPLE_RATE SAMPLE_RATE_48K
+#define AUDIO_CHANNEL_COUNT 2
+#define I2S_INPUT_FORMAT I2S_INPUT_FORMAT_32BIT
+#define I2S_JUSTIFIED I2S_INPUT_LEFT_JUSTIFIED
+#define I2S_DATA_DELAY I2S_DATA_1T_DELAY
+#define I2S_WS_CHANNEL I2S_WS_LEFT_CHANNEL
+#define I2S_DATA_SEQUENCE I2S_DATA_MSB_FIRST
+#define AUDIO_WORD_LENGTH WORD_LENGTH_24BIT
+
+enum aux_cmd_type {
+ CMD_AUX_NATIVE_READ = 0x0,
+ CMD_AUX_NATIVE_WRITE = 0x5,
+ CMD_AUX_I2C_EDID_READ = 0xB,
+};
+
+enum aux_cmd_reply {
+ REPLY_ACK,
+ REPLY_NACK,
+ REPLY_DEFER,
+};
+
+enum link_train_status {
+ LINK_IDLE,
+ LINK_BUSY,
+ LINK_OK,
+};
+
+enum hdcp_state {
+ HDCP_AUTH_IDLE,
+ HDCP_AUTH_GOING,
+ HDCP_AUTH_DONE,
+};
+
+struct it6505_platform_data {
+ struct regulator *pwr18;
+ struct regulator *ovdd;
+ struct gpio_desc *gpiod_reset;
+};
+
+enum it6505_audio_select {
+ I2S = 0,
+ SPDIF,
+};
+
+enum it6505_audio_sample_rate {
+ SAMPLE_RATE_24K = 0x6,
+ SAMPLE_RATE_32K = 0x3,
+ SAMPLE_RATE_48K = 0x2,
+ SAMPLE_RATE_96K = 0xA,
+ SAMPLE_RATE_192K = 0xE,
+ SAMPLE_RATE_44_1K = 0x0,
+ SAMPLE_RATE_88_2K = 0x8,
+ SAMPLE_RATE_176_4K = 0xC,
+};
+
+enum it6505_audio_type {
+ LPCM = 0,
+ NLPCM,
+ DSS,
+};
+
+struct it6505_audio_data {
+ enum it6505_audio_select select;
+ enum it6505_audio_sample_rate sample_rate;
+ enum it6505_audio_type type;
+ u8 word_length;
+ u8 channel_count;
+ u8 i2s_input_format;
+ u8 i2s_justified;
+ u8 i2s_data_delay;
+ u8 i2s_ws_channel;
+ u8 i2s_data_sequence;
+};
+
+struct it6505_audio_sample_rate_map {
+ enum it6505_audio_sample_rate rate;
+ int sample_rate_value;
+};
+
+struct it6505_drm_dp_link {
+ unsigned char revision;
+ unsigned int rate;
+ unsigned int num_lanes;
+ unsigned long capabilities;
+};
+
+struct debugfs_entries {
+ char *name;
+ const struct file_operations *fops;
+};
+
+struct it6505 {
+ struct drm_dp_aux aux;
+ struct drm_bridge bridge;
+ struct i2c_client *client;
+ struct it6505_drm_dp_link link;
+ struct it6505_platform_data pdata;
+ /*
+ * Mutex protects extcon and interrupt functions from interfering
+ * each other.
+ */
+ struct mutex extcon_lock;
+ struct mutex mode_lock; /* used to bridge_detect */
+ struct mutex aux_lock; /* used to aux data transfers */
+ struct regmap *regmap;
+ struct drm_display_mode source_output_mode;
+ struct drm_display_mode video_info;
+ struct notifier_block event_nb;
+ struct extcon_dev *extcon;
+ struct work_struct extcon_wq;
+ enum drm_connector_status connector_status;
+ enum link_train_status link_state;
+ struct work_struct link_works;
+ u8 dpcd[DP_RECEIVER_CAP_SIZE];
+ u8 lane_count;
+ u8 link_rate_bw_code;
+ u8 sink_count;
+ bool step_train;
+ bool branch_device;
+ bool enable_ssc;
+ bool lane_swap_disabled;
+ bool lane_swap;
+ bool powered;
+ bool hpd_state;
+ u32 afe_setting;
+ enum hdcp_state hdcp_status;
+ struct delayed_work hdcp_work;
+ struct work_struct hdcp_wait_ksv_list;
+ struct completion wait_edid_complete;
+ u8 auto_train_retry;
+ bool hdcp_desired;
+ bool is_repeater;
+ u8 hdcp_down_stream_count;
+ u8 bksvs[DRM_HDCP_KSV_LEN];
+ u8 sha1_input[HDCP_SHA1_FIFO_LEN];
+ bool enable_enhanced_frame;
+ hdmi_codec_plugged_cb plugged_cb;
+ struct device *codec_dev;
+ struct delayed_work delayed_audio;
+ struct it6505_audio_data audio;
+ struct dentry *debugfs;
+
+ /* it6505 driver hold option */
+ bool enable_drv_hold;
+};
+
+struct it6505_step_train_para {
+ u8 voltage_swing[MAX_LANE_COUNT];
+ u8 pre_emphasis[MAX_LANE_COUNT];
+};
+
+/*
+ * Vendor option afe settings for different platforms
+ * 0: without FPC cable
+ * 1: with FPC cable
+ */
+
+static const u8 afe_setting_table[][3] = {
+ {0x82, 0x00, 0x45},
+ {0x93, 0x2A, 0x85}
+};
+
+static const struct it6505_audio_sample_rate_map audio_sample_rate_map[] = {
+ {SAMPLE_RATE_24K, 24000},
+ {SAMPLE_RATE_32K, 32000},
+ {SAMPLE_RATE_48K, 48000},
+ {SAMPLE_RATE_96K, 96000},
+ {SAMPLE_RATE_192K, 192000},
+ {SAMPLE_RATE_44_1K, 44100},
+ {SAMPLE_RATE_88_2K, 88200},
+ {SAMPLE_RATE_176_4K, 176400},
+};
+
+static const struct regmap_range it6505_bridge_volatile_ranges[] = {
+ { .range_min = 0, .range_max = 0xFF },
+};
+
+static const struct regmap_access_table it6505_bridge_volatile_table = {
+ .yes_ranges = it6505_bridge_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(it6505_bridge_volatile_ranges),
+};
+
+static const struct regmap_config it6505_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .volatile_table = &it6505_bridge_volatile_table,
+ .cache_type = REGCACHE_NONE,
+};
+
+static int it6505_read(struct it6505 *it6505, unsigned int reg_addr)
+{
+ unsigned int value;
+ int err;
+ struct device *dev = &it6505->client->dev;
+
+ if (!it6505->powered)
+ return -ENODEV;
+
+ err = regmap_read(it6505->regmap, reg_addr, &value);
+ if (err < 0) {
+ dev_err(dev, "read failed reg[0x%x] err: %d", reg_addr, err);
+ return err;
+ }
+
+ return value;
+}
+
+static int it6505_write(struct it6505 *it6505, unsigned int reg_addr,
+ unsigned int reg_val)
+{
+ int err;
+ struct device *dev = &it6505->client->dev;
+
+ if (!it6505->powered)
+ return -ENODEV;
+
+ err = regmap_write(it6505->regmap, reg_addr, reg_val);
+
+ if (err < 0) {
+ dev_err(dev, "write failed reg[0x%x] = 0x%x err = %d",
+ reg_addr, reg_val, err);
+ return err;
+ }
+
+ return 0;
+}
+
+static int it6505_set_bits(struct it6505 *it6505, unsigned int reg,
+ unsigned int mask, unsigned int value)
+{
+ int err;
+ struct device *dev = &it6505->client->dev;
+
+ if (!it6505->powered)
+ return -ENODEV;
+
+ err = regmap_update_bits(it6505->regmap, reg, mask, value);
+ if (err < 0) {
+ dev_err(dev, "write reg[0x%x] = 0x%x mask = 0x%x failed err %d",
+ reg, value, mask, err);
+ return err;
+ }
+
+ return 0;
+}
+
+static void it6505_debug_print(struct it6505 *it6505, unsigned int reg,
+ const char *prefix)
+{
+ struct device *dev = &it6505->client->dev;
+ int val;
+
+ if (!drm_debug_enabled(DRM_UT_DRIVER))
+ return;
+
+ val = it6505_read(it6505, reg);
+ if (val < 0)
+ DRM_DEV_DEBUG_DRIVER(dev, "%s reg[%02x] read error (%d)",
+ prefix, reg, val);
+ else
+ DRM_DEV_DEBUG_DRIVER(dev, "%s reg[%02x] = 0x%02x", prefix, reg,
+ val);
+}
+
+static int it6505_dpcd_read(struct it6505 *it6505, unsigned long offset)
+{
+ u8 value;
+ int ret;
+ struct device *dev = &it6505->client->dev;
+
+ ret = drm_dp_dpcd_readb(&it6505->aux, offset, &value);
+ if (ret < 0) {
+ dev_err(dev, "DPCD read failed [0x%lx] ret: %d", offset, ret);
+ return ret;
+ }
+ return value;
+}
+
+static int it6505_dpcd_write(struct it6505 *it6505, unsigned long offset,
+ u8 datain)
+{
+ int ret;
+ struct device *dev = &it6505->client->dev;
+
+ ret = drm_dp_dpcd_writeb(&it6505->aux, offset, datain);
+ if (ret < 0) {
+ dev_err(dev, "DPCD write failed [0x%lx] ret: %d", offset, ret);
+ return ret;
+ }
+ return 0;
+}
+
+static int it6505_get_dpcd(struct it6505 *it6505, int offset, u8 *dpcd, int num)
+{
+ int ret;
+ struct device *dev = &it6505->client->dev;
+
+ ret = drm_dp_dpcd_read(&it6505->aux, offset, dpcd, num);
+
+ if (ret < 0)
+ return ret;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "ret = %d DPCD[0x%x] = 0x%*ph", ret, offset,
+ num, dpcd);
+
+ return 0;
+}
+
+static void it6505_dump(struct it6505 *it6505)
+{
+ unsigned int i, j;
+ u8 regs[16];
+ struct device *dev = &it6505->client->dev;
+
+ for (i = 0; i <= 0xff; i += 16) {
+ for (j = 0; j < 16; j++)
+ regs[j] = it6505_read(it6505, i + j);
+
+ DRM_DEV_DEBUG_DRIVER(dev, "[0x%02x] = %16ph", i, regs);
+ }
+}
+
+static bool it6505_get_sink_hpd_status(struct it6505 *it6505)
+{
+ int reg_0d;
+
+ reg_0d = it6505_read(it6505, REG_SYSTEM_STS);
+
+ if (reg_0d < 0)
+ return false;
+
+ return reg_0d & HPD_STS;
+}
+
+static int it6505_read_word(struct it6505 *it6505, unsigned int reg)
+{
+ int val0, val1;
+
+ val0 = it6505_read(it6505, reg);
+ if (val0 < 0)
+ return val0;
+
+ val1 = it6505_read(it6505, reg + 1);
+ if (val1 < 0)
+ return val1;
+
+ return (val1 << 8) | val0;
+}
+
+static void it6505_calc_video_info(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+ int hsync_pol, vsync_pol, interlaced;
+ int htotal, hdes, hdew, hfph, hsyncw;
+ int vtotal, vdes, vdew, vfph, vsyncw;
+ int rddata, i, pclk, sum = 0;
+
+ usleep_range(10000, 15000);
+ rddata = it6505_read(it6505, REG_INPUT_CTRL);
+ hsync_pol = rddata & INPUT_HSYNC_POL;
+ vsync_pol = (rddata & INPUT_VSYNC_POL) >> 2;
+ interlaced = (rddata & INPUT_INTERLACED) >> 4;
+
+ htotal = it6505_read_word(it6505, REG_INPUT_HTOTAL) & 0x1FFF;
+ hdes = it6505_read_word(it6505, REG_INPUT_HACTIVE_START) & 0x1FFF;
+ hdew = it6505_read_word(it6505, REG_INPUT_HACTIVE_WIDTH) & 0x1FFF;
+ hfph = it6505_read_word(it6505, REG_INPUT_HFRONT_PORCH) & 0x1FFF;
+ hsyncw = it6505_read_word(it6505, REG_INPUT_HSYNC_WIDTH) & 0x1FFF;
+
+ vtotal = it6505_read_word(it6505, REG_INPUT_VTOTAL) & 0xFFF;
+ vdes = it6505_read_word(it6505, REG_INPUT_VACTIVE_START) & 0xFFF;
+ vdew = it6505_read_word(it6505, REG_INPUT_VACTIVE_WIDTH) & 0xFFF;
+ vfph = it6505_read_word(it6505, REG_INPUT_VFRONT_PORCH) & 0xFFF;
+ vsyncw = it6505_read_word(it6505, REG_INPUT_VSYNC_WIDTH) & 0xFFF;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "hsync_pol:%d, vsync_pol:%d, interlaced:%d",
+ hsync_pol, vsync_pol, interlaced);
+ DRM_DEV_DEBUG_DRIVER(dev, "hactive_start:%d, vactive_start:%d",
+ hdes, vdes);
+
+ for (i = 0; i < 3; i++) {
+ it6505_set_bits(it6505, REG_DATA_CTRL0, ENABLE_PCLK_COUNTER,
+ ENABLE_PCLK_COUNTER);
+ usleep_range(10000, 15000);
+ it6505_set_bits(it6505, REG_DATA_CTRL0, ENABLE_PCLK_COUNTER,
+ 0x00);
+ rddata = it6505_read_word(it6505, REG_PCLK_COUNTER_VALUE) &
+ 0xFFF;
+
+ sum += rddata;
+ }
+
+ if (sum == 0) {
+ DRM_DEV_DEBUG_DRIVER(dev, "calc video timing error");
+ return;
+ }
+
+ sum /= 3;
+ pclk = 13500 * 2048 / sum;
+ it6505->video_info.clock = pclk;
+ it6505->video_info.hdisplay = hdew;
+ it6505->video_info.hsync_start = hdew + hfph;
+ it6505->video_info.hsync_end = hdew + hfph + hsyncw;
+ it6505->video_info.htotal = htotal;
+ it6505->video_info.vdisplay = vdew;
+ it6505->video_info.vsync_start = vdew + vfph;
+ it6505->video_info.vsync_end = vdew + vfph + vsyncw;
+ it6505->video_info.vtotal = vtotal;
+
+ DRM_DEV_DEBUG_DRIVER(dev, DRM_MODE_FMT,
+ DRM_MODE_ARG(&it6505->video_info));
+}
+
+static int it6505_drm_dp_link_probe(struct drm_dp_aux *aux,
+ struct it6505_drm_dp_link *link)
+{
+ u8 values[3];
+ int err;
+
+ memset(link, 0, sizeof(*link));
+
+ err = drm_dp_dpcd_read(aux, DP_DPCD_REV, values, sizeof(values));
+ if (err < 0)
+ return err;
+
+ link->revision = values[0];
+ link->rate = drm_dp_bw_code_to_link_rate(values[1]);
+ link->num_lanes = values[2] & DP_MAX_LANE_COUNT_MASK;
+
+ if (values[2] & DP_ENHANCED_FRAME_CAP)
+ link->capabilities = DP_ENHANCED_FRAME_CAP;
+
+ return 0;
+}
+
+static int it6505_drm_dp_link_set_power(struct drm_dp_aux *aux,
+ struct it6505_drm_dp_link *link,
+ u8 mode)
+{
+ u8 value;
+ int err;
+
+ /* DP_SET_POWER register is only available on DPCD v1.1 and later */
+ if (link->revision < DPCD_V_1_1)
+ return 0;
+
+ err = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value);
+ if (err < 0)
+ return err;
+
+ value &= ~DP_SET_POWER_MASK;
+ value |= mode;
+
+ err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value);
+ if (err < 0)
+ return err;
+
+ if (mode == DP_SET_POWER_D0) {
+ /*
+ * According to the DP 1.1 specification, a "Sink Device must
+ * exit the power saving state within 1 ms" (Section 2.5.3.1,
+ * Table 5-52, "Sink Control Field" (register 0x600).
+ */
+ usleep_range(1000, 2000);
+ }
+
+ return 0;
+}
+
+static void it6505_clear_int(struct it6505 *it6505)
+{
+ it6505_write(it6505, INT_STATUS_01, 0xFF);
+ it6505_write(it6505, INT_STATUS_02, 0xFF);
+ it6505_write(it6505, INT_STATUS_03, 0xFF);
+}
+
+static void it6505_int_mask_enable(struct it6505 *it6505)
+{
+ it6505_write(it6505, INT_MASK_01, BIT(INT_HPD_CHANGE) |
+ BIT(INT_RECEIVE_HPD_IRQ) | BIT(INT_SCDT_CHANGE) |
+ BIT(INT_HDCP_FAIL) | BIT(INT_HDCP_DONE));
+
+ it6505_write(it6505, INT_MASK_02, BIT(INT_AUX_CMD_FAIL) |
+ BIT(INT_HDCP_KSV_CHECK) | BIT(INT_AUDIO_FIFO_ERROR));
+
+ it6505_write(it6505, INT_MASK_03, BIT(INT_LINK_TRAIN_FAIL) |
+ BIT(INT_VID_FIFO_ERROR) | BIT(INT_IO_LATCH_FIFO_OVERFLOW));
+}
+
+static void it6505_int_mask_disable(struct it6505 *it6505)
+{
+ it6505_write(it6505, INT_MASK_01, 0x00);
+ it6505_write(it6505, INT_MASK_02, 0x00);
+ it6505_write(it6505, INT_MASK_03, 0x00);
+}
+
+static void it6505_lane_termination_on(struct it6505 *it6505)
+{
+ int regcf;
+
+ regcf = it6505_read(it6505, REG_USER_DRV_PRE);
+
+ if (regcf == MISC_VERB)
+ it6505_set_bits(it6505, REG_DRV_LN_DATA_SEL, 0x80, 0x00);
+
+ if (regcf == MISC_VERC) {
+ if (it6505->lane_swap) {
+ switch (it6505->lane_count) {
+ case 1:
+ case 2:
+ it6505_set_bits(it6505, REG_DRV_LN_DATA_SEL,
+ 0x0C, 0x08);
+ break;
+ default:
+ it6505_set_bits(it6505, REG_DRV_LN_DATA_SEL,
+ 0x0C, 0x0C);
+ break;
+ }
+ } else {
+ switch (it6505->lane_count) {
+ case 1:
+ case 2:
+ it6505_set_bits(it6505, REG_DRV_LN_DATA_SEL,
+ 0x0C, 0x04);
+ break;
+ default:
+ it6505_set_bits(it6505, REG_DRV_LN_DATA_SEL,
+ 0x0C, 0x0C);
+ break;
+ }
+ }
+ }
+}
+
+static void it6505_lane_termination_off(struct it6505 *it6505)
+{
+ int regcf;
+
+ regcf = it6505_read(it6505, REG_USER_DRV_PRE);
+
+ if (regcf == MISC_VERB)
+ it6505_set_bits(it6505, REG_DRV_LN_DATA_SEL, 0x80, 0x80);
+
+ if (regcf == MISC_VERC)
+ it6505_set_bits(it6505, REG_DRV_LN_DATA_SEL, 0x0C, 0x00);
+}
+
+static void it6505_lane_power_on(struct it6505 *it6505)
+{
+ it6505_set_bits(it6505, REG_LINK_DRV, 0xF1,
+ (it6505->lane_swap ?
+ GENMASK(7, 8 - it6505->lane_count) :
+ GENMASK(3 + it6505->lane_count, 4)) |
+ 0x01);
+}
+
+static void it6505_lane_power_off(struct it6505 *it6505)
+{
+ it6505_set_bits(it6505, REG_LINK_DRV, 0xF0, 0x00);
+}
+
+static void it6505_lane_off(struct it6505 *it6505)
+{
+ it6505_lane_power_off(it6505);
+ it6505_lane_termination_off(it6505);
+}
+
+static void it6505_aux_termination_on(struct it6505 *it6505)
+{
+ int regcf;
+
+ regcf = it6505_read(it6505, REG_USER_DRV_PRE);
+
+ if (regcf == MISC_VERB)
+ it6505_lane_termination_on(it6505);
+
+ if (regcf == MISC_VERC)
+ it6505_set_bits(it6505, REG_DRV_LN_DATA_SEL, 0x80, 0x80);
+}
+
+static void it6505_aux_power_on(struct it6505 *it6505)
+{
+ it6505_set_bits(it6505, REG_AUX, 0x02, 0x02);
+}
+
+static void it6505_aux_on(struct it6505 *it6505)
+{
+ it6505_aux_power_on(it6505);
+ it6505_aux_termination_on(it6505);
+}
+
+static void it6505_aux_reset(struct it6505 *it6505)
+{
+ it6505_set_bits(it6505, REG_RESET_CTRL, AUX_RESET, AUX_RESET);
+ it6505_set_bits(it6505, REG_RESET_CTRL, AUX_RESET, 0x00);
+}
+
+static void it6505_reset_logic(struct it6505 *it6505)
+{
+ regmap_write(it6505->regmap, REG_RESET_CTRL, ALL_LOGIC_RESET);
+ usleep_range(1000, 1500);
+}
+
+static bool it6505_aux_op_finished(struct it6505 *it6505)
+{
+ int reg2b = it6505_read(it6505, REG_AUX_CMD_REQ);
+
+ if (reg2b < 0)
+ return false;
+
+ return (reg2b & AUX_BUSY) == 0;
+}
+
+static int it6505_aux_wait(struct it6505 *it6505)
+{
+ int status;
+ unsigned long timeout;
+ struct device *dev = &it6505->client->dev;
+
+ timeout = jiffies + msecs_to_jiffies(AUX_WAIT_TIMEOUT_MS) + 1;
+
+ while (!it6505_aux_op_finished(it6505)) {
+ if (time_after(jiffies, timeout)) {
+ dev_err(dev, "Timed out waiting AUX to finish");
+ return -ETIMEDOUT;
+ }
+ usleep_range(1000, 2000);
+ }
+
+ status = it6505_read(it6505, REG_AUX_ERROR_STS);
+ if (status < 0) {
+ dev_err(dev, "Failed to read AUX channel: %d", status);
+ return status;
+ }
+
+ return 0;
+}
+
+static ssize_t it6505_aux_operation(struct it6505 *it6505,
+ enum aux_cmd_type cmd,
+ unsigned int address, u8 *buffer,
+ size_t size, enum aux_cmd_reply *reply)
+{
+ int i, ret;
+ bool aux_write_check = false;
+
+ if (!it6505_get_sink_hpd_status(it6505))
+ return -EIO;
+
+ /* set AUX user mode */
+ it6505_set_bits(it6505, REG_AUX_CTRL, AUX_USER_MODE, AUX_USER_MODE);
+
+aux_op_start:
+ if (cmd == CMD_AUX_I2C_EDID_READ) {
+ /* AUX EDID FIFO has max length of AUX_FIFO_MAX_SIZE bytes. */
+ size = min_t(size_t, size, AUX_FIFO_MAX_SIZE);
+ /* Enable AUX FIFO read back and clear FIFO */
+ it6505_set_bits(it6505, REG_AUX_CTRL,
+ AUX_EN_FIFO_READ | CLR_EDID_FIFO,
+ AUX_EN_FIFO_READ | CLR_EDID_FIFO);
+
+ it6505_set_bits(it6505, REG_AUX_CTRL,
+ AUX_EN_FIFO_READ | CLR_EDID_FIFO,
+ AUX_EN_FIFO_READ);
+ } else {
+ /* The DP AUX transmit buffer has 4 bytes. */
+ size = min_t(size_t, size, 4);
+ it6505_set_bits(it6505, REG_AUX_CTRL, AUX_NO_SEGMENT_WR,
+ AUX_NO_SEGMENT_WR);
+ }
+
+ /* Start Address[7:0] */
+ it6505_write(it6505, REG_AUX_ADR_0_7, (address >> 0) & 0xFF);
+ /* Start Address[15:8] */
+ it6505_write(it6505, REG_AUX_ADR_8_15, (address >> 8) & 0xFF);
+ /* WriteNum[3:0]+StartAdr[19:16] */
+ it6505_write(it6505, REG_AUX_ADR_16_19,
+ ((address >> 16) & 0x0F) | ((size - 1) << 4));
+
+ if (cmd == CMD_AUX_NATIVE_WRITE)
+ regmap_bulk_write(it6505->regmap, REG_AUX_OUT_DATA0, buffer,
+ size);
+
+ /* Aux Fire */
+ it6505_write(it6505, REG_AUX_CMD_REQ, cmd);
+
+ ret = it6505_aux_wait(it6505);
+ if (ret < 0)
+ goto aux_op_err;
+
+ ret = it6505_read(it6505, REG_AUX_ERROR_STS);
+ if (ret < 0)
+ goto aux_op_err;
+
+ switch ((ret >> 6) & 0x3) {
+ case 0:
+ *reply = REPLY_ACK;
+ break;
+ case 1:
+ *reply = REPLY_DEFER;
+ ret = -EAGAIN;
+ goto aux_op_err;
+ case 2:
+ *reply = REPLY_NACK;
+ ret = -EIO;
+ goto aux_op_err;
+ case 3:
+ ret = -ETIMEDOUT;
+ goto aux_op_err;
+ }
+
+ /* Read back Native Write data */
+ if (cmd == CMD_AUX_NATIVE_WRITE) {
+ aux_write_check = true;
+ cmd = CMD_AUX_NATIVE_READ;
+ goto aux_op_start;
+ }
+
+ if (cmd == CMD_AUX_I2C_EDID_READ) {
+ for (i = 0; i < size; i++) {
+ ret = it6505_read(it6505, REG_AUX_DATA_FIFO);
+ if (ret < 0)
+ goto aux_op_err;
+ buffer[i] = ret;
+ }
+ } else {
+ for (i = 0; i < size; i++) {
+ ret = it6505_read(it6505, REG_AUX_DATA_0_7 + i);
+ if (ret < 0)
+ goto aux_op_err;
+
+ if (aux_write_check && buffer[size - 1 - i] != ret) {
+ ret = -EINVAL;
+ goto aux_op_err;
+ }
+
+ buffer[size - 1 - i] = ret;
+ }
+ }
+
+ ret = i;
+
+aux_op_err:
+ if (cmd == CMD_AUX_I2C_EDID_READ) {
+ /* clear AUX FIFO */
+ it6505_set_bits(it6505, REG_AUX_CTRL,
+ AUX_EN_FIFO_READ | CLR_EDID_FIFO,
+ AUX_EN_FIFO_READ | CLR_EDID_FIFO);
+ it6505_set_bits(it6505, REG_AUX_CTRL,
+ AUX_EN_FIFO_READ | CLR_EDID_FIFO, 0x00);
+ }
+
+ /* Leave AUX user mode */
+ it6505_set_bits(it6505, REG_AUX_CTRL, AUX_USER_MODE, 0);
+
+ return ret;
+}
+
+static ssize_t it6505_aux_do_transfer(struct it6505 *it6505,
+ enum aux_cmd_type cmd,
+ unsigned int address, u8 *buffer,
+ size_t size, enum aux_cmd_reply *reply)
+{
+ int i, ret_size, ret = 0, request_size;
+
+ mutex_lock(&it6505->aux_lock);
+ for (i = 0; i < size; i += 4) {
+ request_size = min((int)size - i, 4);
+ ret_size = it6505_aux_operation(it6505, cmd, address + i,
+ buffer + i, request_size,
+ reply);
+ if (ret_size < 0) {
+ ret = ret_size;
+ goto aux_op_err;
+ }
+
+ ret += ret_size;
+ }
+
+aux_op_err:
+ mutex_unlock(&it6505->aux_lock);
+ return ret;
+}
+
+static ssize_t it6505_aux_transfer(struct drm_dp_aux *aux,
+ struct drm_dp_aux_msg *msg)
+{
+ struct it6505 *it6505 = container_of(aux, struct it6505, aux);
+ u8 cmd;
+ bool is_i2c = !(msg->request & DP_AUX_NATIVE_WRITE);
+ int ret;
+ enum aux_cmd_reply reply;
+
+ /* IT6505 doesn't support arbitrary I2C read / write. */
+ if (is_i2c)
+ return -EINVAL;
+
+ switch (msg->request) {
+ case DP_AUX_NATIVE_READ:
+ cmd = CMD_AUX_NATIVE_READ;
+ break;
+ case DP_AUX_NATIVE_WRITE:
+ cmd = CMD_AUX_NATIVE_WRITE;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = it6505_aux_do_transfer(it6505, cmd, msg->address, msg->buffer,
+ msg->size, &reply);
+ if (ret < 0)
+ return ret;
+
+ switch (reply) {
+ case REPLY_ACK:
+ msg->reply = DP_AUX_NATIVE_REPLY_ACK;
+ break;
+ case REPLY_NACK:
+ msg->reply = DP_AUX_NATIVE_REPLY_NACK;
+ break;
+ case REPLY_DEFER:
+ msg->reply = DP_AUX_NATIVE_REPLY_DEFER;
+ break;
+ }
+
+ return ret;
+}
+
+static int it6505_get_edid_block(void *data, u8 *buf, unsigned int block,
+ size_t len)
+{
+ struct it6505 *it6505 = data;
+ struct device *dev = &it6505->client->dev;
+ enum aux_cmd_reply reply;
+ int offset, ret, aux_retry = 100;
+
+ it6505_aux_reset(it6505);
+ DRM_DEV_DEBUG_DRIVER(dev, "block number = %d", block);
+
+ for (offset = 0; offset < EDID_LENGTH;) {
+ ret = it6505_aux_do_transfer(it6505, CMD_AUX_I2C_EDID_READ,
+ block * EDID_LENGTH + offset,
+ buf + offset, 8, &reply);
+
+ if (ret < 0 && ret != -EAGAIN)
+ return ret;
+
+ switch (reply) {
+ case REPLY_ACK:
+ DRM_DEV_DEBUG_DRIVER(dev, "[0x%02x]: %8ph", offset,
+ buf + offset);
+ offset += 8;
+ aux_retry = 100;
+ break;
+ case REPLY_NACK:
+ return -EIO;
+ case REPLY_DEFER:
+ msleep(20);
+ if (!(--aux_retry))
+ return -EIO;
+ }
+ }
+
+ return 0;
+}
+
+static void it6505_variable_config(struct it6505 *it6505)
+{
+ it6505->link_rate_bw_code = HBR;
+ it6505->lane_count = MAX_LANE_COUNT;
+ it6505->link_state = LINK_IDLE;
+ it6505->hdcp_desired = HDCP_DESIRED;
+ it6505->auto_train_retry = AUTO_TRAIN_RETRY;
+ it6505->audio.select = AUDIO_SELECT;
+ it6505->audio.sample_rate = AUDIO_SAMPLE_RATE;
+ it6505->audio.channel_count = AUDIO_CHANNEL_COUNT;
+ it6505->audio.type = AUDIO_TYPE;
+ it6505->audio.i2s_input_format = I2S_INPUT_FORMAT;
+ it6505->audio.i2s_justified = I2S_JUSTIFIED;
+ it6505->audio.i2s_data_delay = I2S_DATA_DELAY;
+ it6505->audio.i2s_ws_channel = I2S_WS_CHANNEL;
+ it6505->audio.i2s_data_sequence = I2S_DATA_SEQUENCE;
+ it6505->audio.word_length = AUDIO_WORD_LENGTH;
+ memset(it6505->sha1_input, 0, sizeof(it6505->sha1_input));
+ memset(it6505->bksvs, 0, sizeof(it6505->bksvs));
+}
+
+static int it6505_send_video_infoframe(struct it6505 *it6505,
+ struct hdmi_avi_infoframe *frame)
+{
+ u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];
+ int err;
+ struct device *dev = &it6505->client->dev;
+
+ err = hdmi_avi_infoframe_pack(frame, buffer, sizeof(buffer));
+ if (err < 0) {
+ dev_err(dev, "Failed to pack AVI infoframe: %d", err);
+ return err;
+ }
+
+ err = it6505_set_bits(it6505, REG_INFOFRAME_CTRL, EN_AVI_PKT, 0x00);
+ if (err)
+ return err;
+
+ err = regmap_bulk_write(it6505->regmap, REG_AVI_INFO_DB1,
+ buffer + HDMI_INFOFRAME_HEADER_SIZE,
+ frame->length);
+ if (err)
+ return err;
+
+ err = it6505_set_bits(it6505, REG_INFOFRAME_CTRL, EN_AVI_PKT,
+ EN_AVI_PKT);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static void it6505_get_extcon_property(struct it6505 *it6505)
+{
+ int err;
+ union extcon_property_value property;
+ struct device *dev = &it6505->client->dev;
+
+ if (it6505->extcon && !it6505->lane_swap_disabled) {
+ err = extcon_get_property(it6505->extcon, EXTCON_DISP_DP,
+ EXTCON_PROP_USB_TYPEC_POLARITY,
+ &property);
+ if (err) {
+ dev_err(dev, "get property fail!");
+ return;
+ }
+ it6505->lane_swap = property.intval;
+ }
+}
+
+static void it6505_clk_phase_adjustment(struct it6505 *it6505,
+ const struct drm_display_mode *mode)
+{
+ int clock = mode->clock;
+
+ it6505_set_bits(it6505, REG_CLK_CTRL0, M_PCLK_DELAY,
+ clock < ADJUST_PHASE_THRESHOLD ? PIXEL_CLK_DELAY : 0);
+ it6505_set_bits(it6505, REG_DATA_CTRL0, VIDEO_LATCH_EDGE,
+ PIXEL_CLK_INVERSE << 4);
+}
+
+static void it6505_link_reset_step_train(struct it6505 *it6505)
+{
+ it6505_set_bits(it6505, REG_TRAIN_CTRL0,
+ FORCE_CR_DONE | FORCE_EQ_DONE, 0x00);
+ it6505_dpcd_write(it6505, DP_TRAINING_PATTERN_SET,
+ DP_TRAINING_PATTERN_DISABLE);
+}
+
+static void it6505_init(struct it6505 *it6505)
+{
+ it6505_write(it6505, REG_AUX_OPT, AUX_AUTO_RST | AUX_FIX_FREQ);
+ it6505_write(it6505, REG_AUX_CTRL, AUX_NO_SEGMENT_WR);
+ it6505_write(it6505, REG_HDCP_CTRL2, HDCP_AN_SEL | HDCP_HW_HPDIRQ_ACT);
+ it6505_write(it6505, REG_VID_BUS_CTRL0, IN_DDR | DDR_CD);
+ it6505_write(it6505, REG_VID_BUS_CTRL1, 0x01);
+ it6505_write(it6505, REG_AUDIO_CTRL0, AUDIO_16B_BOUND);
+
+ /* chip internal setting, don't modify */
+ it6505_write(it6505, REG_HPD_IRQ_TIME, 0xF5);
+ it6505_write(it6505, REG_AUX_DEBUG_MODE, 0x4D);
+ it6505_write(it6505, REG_AUX_OPT2, 0x17);
+ it6505_write(it6505, REG_HDCP_OPT, 0x60);
+ it6505_write(it6505, REG_DATA_MUTE_CTRL,
+ EN_VID_MUTE | EN_AUD_MUTE | ENABLE_AUTO_VIDEO_FIFO_RESET);
+ it6505_write(it6505, REG_TIME_STMP_CTRL,
+ EN_SSC_GAT | EN_ENHANCE_VID_STMP | EN_ENHANCE_AUD_STMP);
+ it6505_write(it6505, REG_INFOFRAME_CTRL, 0x00);
+ it6505_write(it6505, REG_BANK_SEL, 0x01);
+ it6505_write(it6505, REG_DRV_0_DB_800_MV,
+ afe_setting_table[it6505->afe_setting][0]);
+ it6505_write(it6505, REG_PRE_0_DB_800_MV,
+ afe_setting_table[it6505->afe_setting][1]);
+ it6505_write(it6505, REG_PRE_3P5_DB_800_MV,
+ afe_setting_table[it6505->afe_setting][2]);
+ it6505_write(it6505, REG_SSC_CTRL0, 0x9E);
+ it6505_write(it6505, REG_SSC_CTRL1, 0x1C);
+ it6505_write(it6505, REG_SSC_CTRL2, 0x42);
+ it6505_write(it6505, REG_BANK_SEL, 0x00);
+}
+
+static void it6505_video_disable(struct it6505 *it6505)
+{
+ it6505_set_bits(it6505, REG_DATA_MUTE_CTRL, EN_VID_MUTE, EN_VID_MUTE);
+ it6505_set_bits(it6505, REG_INFOFRAME_CTRL, EN_VID_CTRL_PKT, 0x00);
+ it6505_set_bits(it6505, REG_RESET_CTRL, VIDEO_RESET, VIDEO_RESET);
+}
+
+static void it6505_video_reset(struct it6505 *it6505)
+{
+ it6505_link_reset_step_train(it6505);
+ it6505_set_bits(it6505, REG_DATA_MUTE_CTRL, EN_VID_MUTE, EN_VID_MUTE);
+ it6505_set_bits(it6505, REG_INFOFRAME_CTRL, EN_VID_CTRL_PKT, 0x00);
+ it6505_set_bits(it6505, REG_RESET_CTRL, VIDEO_RESET, VIDEO_RESET);
+ it6505_set_bits(it6505, REG_501_FIFO_CTRL, RST_501_FIFO, RST_501_FIFO);
+ it6505_set_bits(it6505, REG_501_FIFO_CTRL, RST_501_FIFO, 0x00);
+ it6505_set_bits(it6505, REG_RESET_CTRL, VIDEO_RESET, 0x00);
+}
+
+static void it6505_update_video_parameter(struct it6505 *it6505,
+ const struct drm_display_mode *mode)
+{
+ it6505_clk_phase_adjustment(it6505, mode);
+ it6505_video_disable(it6505);
+}
+
+static bool it6505_audio_input(struct it6505 *it6505)
+{
+ int reg05, regbe;
+
+ reg05 = it6505_read(it6505, REG_RESET_CTRL);
+ it6505_set_bits(it6505, REG_RESET_CTRL, AUDIO_RESET, 0x00);
+ usleep_range(3000, 4000);
+ regbe = it6505_read(it6505, REG_AUDIO_INPUT_FREQ);
+ it6505_write(it6505, REG_RESET_CTRL, reg05);
+
+ return regbe != 0xFF;
+}
+
+static void it6505_setup_audio_channel_status(struct it6505 *it6505)
+{
+ enum it6505_audio_sample_rate sample_rate = it6505->audio.sample_rate;
+ u8 audio_word_length_map[] = { 0x02, 0x04, 0x03, 0x0B };
+
+ /* Channel Status */
+ it6505_write(it6505, REG_IEC958_STS0, it6505->audio.type << 1);
+ it6505_write(it6505, REG_IEC958_STS1, 0x00);
+ it6505_write(it6505, REG_IEC958_STS2, 0x00);
+ it6505_write(it6505, REG_IEC958_STS3, sample_rate);
+ it6505_write(it6505, REG_IEC958_STS4, (~sample_rate << 4) |
+ audio_word_length_map[it6505->audio.word_length]);
+}
+
+static void it6505_setup_audio_format(struct it6505 *it6505)
+{
+ /* I2S MODE */
+ it6505_write(it6505, REG_AUDIO_FMT,
+ (it6505->audio.word_length << 5) |
+ (it6505->audio.i2s_data_sequence << 4) |
+ (it6505->audio.i2s_ws_channel << 3) |
+ (it6505->audio.i2s_data_delay << 2) |
+ (it6505->audio.i2s_justified << 1) |
+ it6505->audio.i2s_input_format);
+ if (it6505->audio.select == SPDIF) {
+ it6505_write(it6505, REG_AUDIO_FIFO_SEL, 0x00);
+ /* 0x30 = 128*FS */
+ it6505_set_bits(it6505, REG_AUX_OPT, 0xF0, 0x30);
+ } else {
+ it6505_write(it6505, REG_AUDIO_FIFO_SEL, 0xE4);
+ }
+
+ it6505_write(it6505, REG_AUDIO_CTRL0, 0x20);
+ it6505_write(it6505, REG_AUDIO_CTRL1, 0x00);
+}
+
+static void it6505_enable_audio_source(struct it6505 *it6505)
+{
+ unsigned int audio_source_count;
+
+ audio_source_count = BIT(DIV_ROUND_UP(it6505->audio.channel_count, 2))
+ - 1;
+
+ audio_source_count |= it6505->audio.select << 4;
+
+ it6505_write(it6505, REG_AUDIO_SRC_CTRL, audio_source_count);
+}
+
+static void it6505_enable_audio_infoframe(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+ u8 audio_info_ca[] = { 0x00, 0x00, 0x01, 0x03, 0x07, 0x0B, 0x0F, 0x1F };
+
+ DRM_DEV_DEBUG_DRIVER(dev, "infoframe channel_allocation:0x%02x",
+ audio_info_ca[it6505->audio.channel_count - 1]);
+
+ it6505_write(it6505, REG_AUD_INFOFRAM_DB1, it6505->audio.channel_count
+ - 1);
+ it6505_write(it6505, REG_AUD_INFOFRAM_DB2, 0x00);
+ it6505_write(it6505, REG_AUD_INFOFRAM_DB3,
+ audio_info_ca[it6505->audio.channel_count - 1]);
+ it6505_write(it6505, REG_AUD_INFOFRAM_DB4, 0x00);
+ it6505_write(it6505, REG_AUD_INFOFRAM_SUM, 0x00);
+
+ /* Enable Audio InfoFrame */
+ it6505_set_bits(it6505, REG_INFOFRAME_CTRL, EN_AUD_CTRL_PKT,
+ EN_AUD_CTRL_PKT);
+}
+
+static void it6505_disable_audio(struct it6505 *it6505)
+{
+ it6505_set_bits(it6505, REG_DATA_MUTE_CTRL, EN_AUD_MUTE, EN_AUD_MUTE);
+ it6505_set_bits(it6505, REG_AUDIO_SRC_CTRL, M_AUDIO_I2S_EN, 0x00);
+ it6505_set_bits(it6505, REG_INFOFRAME_CTRL, EN_AUD_CTRL_PKT, 0x00);
+ it6505_set_bits(it6505, REG_RESET_CTRL, AUDIO_RESET, AUDIO_RESET);
+}
+
+static void it6505_enable_audio(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+ int regbe;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "start");
+ it6505_disable_audio(it6505);
+
+ it6505_setup_audio_channel_status(it6505);
+ it6505_setup_audio_format(it6505);
+ it6505_enable_audio_source(it6505);
+ it6505_enable_audio_infoframe(it6505);
+
+ it6505_write(it6505, REG_AUDIO_N_0_7, 0x00);
+ it6505_write(it6505, REG_AUDIO_N_8_15, 0x80);
+ it6505_write(it6505, REG_AUDIO_N_16_23, 0x00);
+
+ it6505_set_bits(it6505, REG_AUDIO_SRC_CTRL, AUDIO_FIFO_RESET,
+ AUDIO_FIFO_RESET);
+ it6505_set_bits(it6505, REG_AUDIO_SRC_CTRL, AUDIO_FIFO_RESET, 0x00);
+ it6505_set_bits(it6505, REG_RESET_CTRL, AUDIO_RESET, 0x00);
+ regbe = it6505_read(it6505, REG_AUDIO_INPUT_FREQ);
+ DRM_DEV_DEBUG_DRIVER(dev, "regbe:0x%02x audio input fs: %d.%d kHz",
+ regbe, 6750 / regbe, (6750 % regbe) * 10 / regbe);
+ it6505_set_bits(it6505, REG_DATA_MUTE_CTRL, EN_AUD_MUTE, 0x00);
+}
+
+static bool it6505_use_step_train_check(struct it6505 *it6505)
+{
+ if (it6505->link.revision >= 0x12)
+ return it6505->dpcd[DP_TRAINING_AUX_RD_INTERVAL] >= 0x01;
+
+ return true;
+}
+
+static void it6505_parse_link_capabilities(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+ struct it6505_drm_dp_link *link = &it6505->link;
+ int bcaps;
+
+ if (it6505->dpcd[0] == 0) {
+ it6505_aux_on(it6505);
+ it6505_get_dpcd(it6505, DP_DPCD_REV, it6505->dpcd,
+ ARRAY_SIZE(it6505->dpcd));
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "DPCD Rev.: %d.%d",
+ link->revision >> 4, link->revision & 0x0F);
+
+ DRM_DEV_DEBUG_DRIVER(dev, "Sink max link rate: %d.%02d Gbps per lane",
+ link->rate / 100000, link->rate / 1000 % 100);
+
+ it6505->link_rate_bw_code = drm_dp_link_rate_to_bw_code(link->rate);
+ DRM_DEV_DEBUG_DRIVER(dev, "link rate bw code:0x%02x",
+ it6505->link_rate_bw_code);
+ it6505->link_rate_bw_code = min_t(int, it6505->link_rate_bw_code,
+ MAX_LINK_RATE);
+
+ it6505->lane_count = link->num_lanes;
+ DRM_DEV_DEBUG_DRIVER(dev, "Sink support %d lanes training",
+ it6505->lane_count);
+ it6505->lane_count = min_t(int, it6505->lane_count, MAX_LANE_COUNT);
+
+ it6505->branch_device = drm_dp_is_branch(it6505->dpcd);
+ DRM_DEV_DEBUG_DRIVER(dev, "Sink %sbranch device",
+ it6505->branch_device ? "" : "Not ");
+
+ it6505->enable_enhanced_frame = link->capabilities;
+ DRM_DEV_DEBUG_DRIVER(dev, "Sink %sSupport Enhanced Framing",
+ it6505->enable_enhanced_frame ? "" : "Not ");
+
+ it6505->enable_ssc = (it6505->dpcd[DP_MAX_DOWNSPREAD] &
+ DP_MAX_DOWNSPREAD_0_5);
+ DRM_DEV_DEBUG_DRIVER(dev, "Maximum Down-Spread: %s, %ssupport SSC!",
+ it6505->enable_ssc ? "0.5" : "0",
+ it6505->enable_ssc ? "" : "Not ");
+
+ it6505->step_train = it6505_use_step_train_check(it6505);
+ if (it6505->step_train)
+ DRM_DEV_DEBUG_DRIVER(dev, "auto train fail, will step train");
+
+ bcaps = it6505_dpcd_read(it6505, DP_AUX_HDCP_BCAPS);
+ DRM_DEV_DEBUG_DRIVER(dev, "bcaps:0x%02x", bcaps);
+ if (bcaps & DP_BCAPS_HDCP_CAPABLE) {
+ it6505->is_repeater = (bcaps & DP_BCAPS_REPEATER_PRESENT);
+ DRM_DEV_DEBUG_DRIVER(dev, "Support HDCP! Downstream is %s!",
+ it6505->is_repeater ? "repeater" :
+ "receiver");
+ } else {
+ DRM_DEV_DEBUG_DRIVER(dev, "Sink not support HDCP!");
+ it6505->hdcp_desired = false;
+ }
+ DRM_DEV_DEBUG_DRIVER(dev, "HDCP %s",
+ it6505->hdcp_desired ? "desired" : "undesired");
+}
+
+static void it6505_setup_ssc(struct it6505 *it6505)
+{
+ it6505_set_bits(it6505, REG_TRAIN_CTRL0, SPREAD_AMP_5,
+ it6505->enable_ssc ? SPREAD_AMP_5 : 0x00);
+ if (it6505->enable_ssc) {
+ it6505_write(it6505, REG_BANK_SEL, 0x01);
+ it6505_write(it6505, REG_SSC_CTRL0, 0x9E);
+ it6505_write(it6505, REG_SSC_CTRL1, 0x1C);
+ it6505_write(it6505, REG_SSC_CTRL2, 0x42);
+ it6505_write(it6505, REG_BANK_SEL, 0x00);
+ it6505_write(it6505, REG_SP_CTRL0, 0x07);
+ it6505_write(it6505, REG_IP_CTRL1, 0x29);
+ it6505_write(it6505, REG_IP_CTRL2, 0x03);
+ /* Stamp Interrupt Step */
+ it6505_set_bits(it6505, REG_TIME_STMP_CTRL, M_STAMP_STEP,
+ 0x10);
+ it6505_dpcd_write(it6505, DP_DOWNSPREAD_CTRL,
+ DP_SPREAD_AMP_0_5);
+ } else {
+ it6505_dpcd_write(it6505, DP_DOWNSPREAD_CTRL, 0x00);
+ it6505_set_bits(it6505, REG_TIME_STMP_CTRL, M_STAMP_STEP,
+ 0x00);
+ }
+}
+
+static inline void it6505_link_rate_setup(struct it6505 *it6505)
+{
+ it6505_set_bits(it6505, REG_TRAIN_CTRL0, FORCE_LBR,
+ (it6505->link_rate_bw_code == RBR) ? FORCE_LBR : 0x00);
+ it6505_set_bits(it6505, REG_LINK_DRV, DRV_HS,
+ (it6505->link_rate_bw_code == RBR) ? 0x00 : DRV_HS);
+}
+
+static void it6505_lane_count_setup(struct it6505 *it6505)
+{
+ it6505_get_extcon_property(it6505);
+ it6505_set_bits(it6505, REG_TRAIN_CTRL0, LANE_SWAP,
+ it6505->lane_swap ? LANE_SWAP : 0x00);
+ it6505_set_bits(it6505, REG_TRAIN_CTRL0, LANE_COUNT_MASK,
+ (it6505->lane_count - 1) << 1);
+}
+
+static void it6505_link_training_setup(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+
+ if (it6505->enable_enhanced_frame)
+ it6505_set_bits(it6505, REG_DATA_MUTE_CTRL,
+ ENABLE_ENHANCED_FRAME, ENABLE_ENHANCED_FRAME);
+
+ it6505_link_rate_setup(it6505);
+ it6505_lane_count_setup(it6505);
+ it6505_setup_ssc(it6505);
+ DRM_DEV_DEBUG_DRIVER(dev,
+ "%s, %d lanes, %sable ssc, %sable enhanced frame",
+ it6505->link_rate_bw_code != RBR ? "HBR" : "RBR",
+ it6505->lane_count,
+ it6505->enable_ssc ? "en" : "dis",
+ it6505->enable_enhanced_frame ? "en" : "dis");
+}
+
+static bool it6505_link_start_auto_train(struct it6505 *it6505)
+{
+ int timeout = 500, link_training_state;
+ bool state = false;
+
+ mutex_lock(&it6505->aux_lock);
+ it6505_set_bits(it6505, REG_TRAIN_CTRL0,
+ FORCE_CR_DONE | FORCE_EQ_DONE, 0x00);
+ it6505_write(it6505, REG_TRAIN_CTRL1, FORCE_RETRAIN);
+ it6505_write(it6505, REG_TRAIN_CTRL1, AUTO_TRAIN);
+
+ while (timeout > 0) {
+ usleep_range(1000, 2000);
+ link_training_state = it6505_read(it6505, REG_LINK_TRAIN_STS);
+
+ if (link_training_state > 0 &&
+ (link_training_state & LINK_STATE_NORP)) {
+ state = true;
+ goto unlock;
+ }
+
+ timeout--;
+ }
+unlock:
+ mutex_unlock(&it6505->aux_lock);
+
+ return state;
+}
+
+static int it6505_drm_dp_link_configure(struct it6505 *it6505)
+{
+ u8 values[2];
+ int err;
+ struct drm_dp_aux *aux = &it6505->aux;
+
+ values[0] = it6505->link_rate_bw_code;
+ values[1] = it6505->lane_count;
+
+ if (it6505->enable_enhanced_frame)
+ values[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
+
+ err = drm_dp_dpcd_write(aux, DP_LINK_BW_SET, values, sizeof(values));
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+static bool it6505_check_voltage_swing_max(u8 lane_voltage_swing_pre_emphasis)
+{
+ return ((lane_voltage_swing_pre_emphasis & 0x03) == MAX_CR_LEVEL);
+}
+
+static bool it6505_check_pre_emphasis_max(u8 lane_voltage_swing_pre_emphasis)
+{
+ return ((lane_voltage_swing_pre_emphasis & 0x03) == MAX_EQ_LEVEL);
+}
+
+static bool it6505_check_max_voltage_swing_reached(u8 *lane_voltage_swing,
+ u8 lane_count)
+{
+ u8 i;
+
+ for (i = 0; i < lane_count; i++) {
+ if (lane_voltage_swing[i] & DP_TRAIN_MAX_SWING_REACHED)
+ return true;
+ }
+
+ return false;
+}
+
+static bool
+step_train_lane_voltage_para_set(struct it6505 *it6505,
+ struct it6505_step_train_para
+ *lane_voltage_pre_emphasis,
+ u8 *lane_voltage_pre_emphasis_set)
+{
+ u8 *voltage_swing = lane_voltage_pre_emphasis->voltage_swing;
+ u8 *pre_emphasis = lane_voltage_pre_emphasis->pre_emphasis;
+ u8 i;
+
+ for (i = 0; i < it6505->lane_count; i++) {
+ voltage_swing[i] &= 0x03;
+ lane_voltage_pre_emphasis_set[i] = voltage_swing[i];
+ if (it6505_check_voltage_swing_max(voltage_swing[i]))
+ lane_voltage_pre_emphasis_set[i] |=
+ DP_TRAIN_MAX_SWING_REACHED;
+
+ pre_emphasis[i] &= 0x03;
+ lane_voltage_pre_emphasis_set[i] |= pre_emphasis[i]
+ << DP_TRAIN_PRE_EMPHASIS_SHIFT;
+ if (it6505_check_pre_emphasis_max(pre_emphasis[i]))
+ lane_voltage_pre_emphasis_set[i] |=
+ DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
+ it6505_dpcd_write(it6505, DP_TRAINING_LANE0_SET + i,
+ lane_voltage_pre_emphasis_set[i]);
+
+ if (lane_voltage_pre_emphasis_set[i] !=
+ it6505_dpcd_read(it6505, DP_TRAINING_LANE0_SET + i))
+ return false;
+ }
+
+ return true;
+}
+
+static bool
+it6505_step_cr_train(struct it6505 *it6505,
+ struct it6505_step_train_para *lane_voltage_pre_emphasis)
+{
+ u8 loop_count = 0, i = 0, j;
+ u8 link_status[DP_LINK_STATUS_SIZE] = { 0 };
+ u8 lane_level_config[MAX_LANE_COUNT] = { 0 };
+ int pre_emphasis_adjust = -1, voltage_swing_adjust = -1;
+ const struct drm_dp_aux *aux = &it6505->aux;
+
+ it6505_dpcd_write(it6505, DP_DOWNSPREAD_CTRL,
+ it6505->enable_ssc ? DP_SPREAD_AMP_0_5 : 0x00);
+ it6505_dpcd_write(it6505, DP_TRAINING_PATTERN_SET,
+ DP_TRAINING_PATTERN_1);
+
+ while (loop_count < 5 && i < 10) {
+ i++;
+ if (!step_train_lane_voltage_para_set(it6505,
+ lane_voltage_pre_emphasis,
+ lane_level_config))
+ continue;
+ drm_dp_link_train_clock_recovery_delay(aux, it6505->dpcd);
+ drm_dp_dpcd_read_link_status(&it6505->aux, link_status);
+
+ if (drm_dp_clock_recovery_ok(link_status, it6505->lane_count)) {
+ it6505_set_bits(it6505, REG_TRAIN_CTRL0, FORCE_CR_DONE,
+ FORCE_CR_DONE);
+ return true;
+ }
+ DRM_DEV_DEBUG_DRIVER(&it6505->client->dev, "cr not done");
+
+ if (it6505_check_max_voltage_swing_reached(lane_level_config,
+ it6505->lane_count))
+ goto cr_train_fail;
+
+ for (j = 0; j < it6505->lane_count; j++) {
+ lane_voltage_pre_emphasis->voltage_swing[j] =
+ drm_dp_get_adjust_request_voltage(link_status,
+ j) >>
+ DP_TRAIN_VOLTAGE_SWING_SHIFT;
+ lane_voltage_pre_emphasis->pre_emphasis[j] =
+ drm_dp_get_adjust_request_pre_emphasis(link_status,
+ j) >>
+ DP_TRAIN_PRE_EMPHASIS_SHIFT;
+ if (voltage_swing_adjust ==
+ lane_voltage_pre_emphasis->voltage_swing[j] &&
+ pre_emphasis_adjust ==
+ lane_voltage_pre_emphasis->pre_emphasis[j]) {
+ loop_count++;
+ continue;
+ }
+
+ voltage_swing_adjust =
+ lane_voltage_pre_emphasis->voltage_swing[j];
+ pre_emphasis_adjust =
+ lane_voltage_pre_emphasis->pre_emphasis[j];
+ loop_count = 0;
+
+ if (voltage_swing_adjust + pre_emphasis_adjust >
+ MAX_EQ_LEVEL)
+ lane_voltage_pre_emphasis->voltage_swing[j] =
+ MAX_EQ_LEVEL -
+ lane_voltage_pre_emphasis
+ ->pre_emphasis[j];
+ }
+ }
+
+cr_train_fail:
+ it6505_dpcd_write(it6505, DP_TRAINING_PATTERN_SET,
+ DP_TRAINING_PATTERN_DISABLE);
+
+ return false;
+}
+
+static bool
+it6505_step_eq_train(struct it6505 *it6505,
+ struct it6505_step_train_para *lane_voltage_pre_emphasis)
+{
+ u8 loop_count = 0, i, link_status[DP_LINK_STATUS_SIZE] = { 0 };
+ u8 lane_level_config[MAX_LANE_COUNT] = { 0 };
+ const struct drm_dp_aux *aux = &it6505->aux;
+
+ it6505_dpcd_write(it6505, DP_TRAINING_PATTERN_SET,
+ DP_TRAINING_PATTERN_2);
+
+ while (loop_count < 6) {
+ loop_count++;
+
+ if (!step_train_lane_voltage_para_set(it6505,
+ lane_voltage_pre_emphasis,
+ lane_level_config))
+ continue;
+
+ drm_dp_link_train_channel_eq_delay(aux, it6505->dpcd);
+ drm_dp_dpcd_read_link_status(&it6505->aux, link_status);
+
+ if (!drm_dp_clock_recovery_ok(link_status, it6505->lane_count))
+ goto eq_train_fail;
+
+ if (drm_dp_channel_eq_ok(link_status, it6505->lane_count)) {
+ it6505_dpcd_write(it6505, DP_TRAINING_PATTERN_SET,
+ DP_TRAINING_PATTERN_DISABLE);
+ it6505_set_bits(it6505, REG_TRAIN_CTRL0, FORCE_EQ_DONE,
+ FORCE_EQ_DONE);
+ return true;
+ }
+ DRM_DEV_DEBUG_DRIVER(&it6505->client->dev, "eq not done");
+
+ for (i = 0; i < it6505->lane_count; i++) {
+ lane_voltage_pre_emphasis->voltage_swing[i] =
+ drm_dp_get_adjust_request_voltage(link_status,
+ i) >>
+ DP_TRAIN_VOLTAGE_SWING_SHIFT;
+ lane_voltage_pre_emphasis->pre_emphasis[i] =
+ drm_dp_get_adjust_request_pre_emphasis(link_status,
+ i) >>
+ DP_TRAIN_PRE_EMPHASIS_SHIFT;
+
+ if (lane_voltage_pre_emphasis->voltage_swing[i] +
+ lane_voltage_pre_emphasis->pre_emphasis[i] >
+ MAX_EQ_LEVEL)
+ lane_voltage_pre_emphasis->voltage_swing[i] =
+ 0x03 - lane_voltage_pre_emphasis
+ ->pre_emphasis[i];
+ }
+ }
+
+eq_train_fail:
+ it6505_dpcd_write(it6505, DP_TRAINING_PATTERN_SET,
+ DP_TRAINING_PATTERN_DISABLE);
+ return false;
+}
+
+static bool it6505_link_start_step_train(struct it6505 *it6505)
+{
+ int err;
+ struct it6505_step_train_para lane_voltage_pre_emphasis = {
+ .voltage_swing = { 0 },
+ .pre_emphasis = { 0 },
+ };
+
+ DRM_DEV_DEBUG_DRIVER(&it6505->client->dev, "start");
+ err = it6505_drm_dp_link_configure(it6505);
+
+ if (err < 0)
+ return false;
+ if (!it6505_step_cr_train(it6505, &lane_voltage_pre_emphasis))
+ return false;
+ if (!it6505_step_eq_train(it6505, &lane_voltage_pre_emphasis))
+ return false;
+ return true;
+}
+
+static bool it6505_get_video_status(struct it6505 *it6505)
+{
+ int reg_0d;
+
+ reg_0d = it6505_read(it6505, REG_SYSTEM_STS);
+
+ if (reg_0d < 0)
+ return false;
+
+ return reg_0d & VIDEO_STB;
+}
+
+static void it6505_reset_hdcp(struct it6505 *it6505)
+{
+ it6505->hdcp_status = HDCP_AUTH_IDLE;
+ /* Disable CP_Desired */
+ it6505_set_bits(it6505, REG_HDCP_CTRL1, HDCP_CP_ENABLE, 0x00);
+ it6505_set_bits(it6505, REG_RESET_CTRL, HDCP_RESET, HDCP_RESET);
+}
+
+static void it6505_start_hdcp(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "start");
+ it6505_reset_hdcp(it6505);
+ queue_delayed_work(system_wq, &it6505->hdcp_work,
+ msecs_to_jiffies(2400));
+}
+
+static void it6505_stop_hdcp(struct it6505 *it6505)
+{
+ it6505_reset_hdcp(it6505);
+ cancel_delayed_work(&it6505->hdcp_work);
+}
+
+static bool it6505_hdcp_is_ksv_valid(u8 *ksv)
+{
+ int i, ones = 0;
+
+ /* KSV has 20 1's and 20 0's */
+ for (i = 0; i < DRM_HDCP_KSV_LEN; i++)
+ ones += hweight8(ksv[i]);
+ if (ones != 20)
+ return false;
+ return true;
+}
+
+static void it6505_hdcp_part1_auth(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+ u8 hdcp_bcaps;
+
+ it6505_set_bits(it6505, REG_RESET_CTRL, HDCP_RESET, 0x00);
+ /* Disable CP_Desired */
+ it6505_set_bits(it6505, REG_HDCP_CTRL1, HDCP_CP_ENABLE, 0x00);
+
+ usleep_range(1000, 1500);
+ hdcp_bcaps = it6505_dpcd_read(it6505, DP_AUX_HDCP_BCAPS);
+ DRM_DEV_DEBUG_DRIVER(dev, "DPCD[0x68028]: 0x%02x",
+ hdcp_bcaps);
+
+ if (!hdcp_bcaps)
+ return;
+
+ /* clear the repeater List Chk Done and fail bit */
+ it6505_set_bits(it6505, REG_HDCP_TRIGGER,
+ HDCP_TRIGGER_KSV_DONE | HDCP_TRIGGER_KSV_FAIL,
+ 0x00);
+
+ /* Enable An Generator */
+ it6505_set_bits(it6505, REG_HDCP_CTRL2, HDCP_AN_GEN, HDCP_AN_GEN);
+ /* delay1ms(10);*/
+ usleep_range(10000, 15000);
+ /* Stop An Generator */
+ it6505_set_bits(it6505, REG_HDCP_CTRL2, HDCP_AN_GEN, 0x00);
+
+ it6505_set_bits(it6505, REG_HDCP_CTRL1, HDCP_CP_ENABLE, HDCP_CP_ENABLE);
+
+ it6505_set_bits(it6505, REG_HDCP_TRIGGER, HDCP_TRIGGER_START,
+ HDCP_TRIGGER_START);
+
+ it6505->hdcp_status = HDCP_AUTH_GOING;
+}
+
+static int it6505_sha1_digest(struct it6505 *it6505, u8 *sha1_input,
+ unsigned int size, u8 *output_av)
+{
+ struct shash_desc *desc;
+ struct crypto_shash *tfm;
+ int err;
+ struct device *dev = &it6505->client->dev;
+
+ tfm = crypto_alloc_shash("sha1", 0, 0);
+ if (IS_ERR(tfm)) {
+ dev_err(dev, "crypto_alloc_shash sha1 failed");
+ return PTR_ERR(tfm);
+ }
+ desc = kzalloc(sizeof(*desc) + crypto_shash_descsize(tfm), GFP_KERNEL);
+ if (!desc) {
+ crypto_free_shash(tfm);
+ return -ENOMEM;
+ }
+
+ desc->tfm = tfm;
+ err = crypto_shash_digest(desc, sha1_input, size, output_av);
+ if (err)
+ dev_err(dev, "crypto_shash_digest sha1 failed");
+
+ crypto_free_shash(tfm);
+ kfree(desc);
+ return err;
+}
+
+static int it6505_setup_sha1_input(struct it6505 *it6505, u8 *sha1_input)
+{
+ struct device *dev = &it6505->client->dev;
+ u8 binfo[2];
+ int down_stream_count, i, err, msg_count = 0;
+
+ err = it6505_get_dpcd(it6505, DP_AUX_HDCP_BINFO, binfo,
+ ARRAY_SIZE(binfo));
+
+ if (err < 0) {
+ dev_err(dev, "Read binfo value Fail");
+ return err;
+ }
+
+ down_stream_count = binfo[0] & 0x7F;
+ DRM_DEV_DEBUG_DRIVER(dev, "binfo:0x%*ph", (int)ARRAY_SIZE(binfo),
+ binfo);
+
+ if ((binfo[0] & BIT(7)) || (binfo[1] & BIT(3))) {
+ dev_err(dev, "HDCP max cascade device exceed");
+ return 0;
+ }
+
+ if (!down_stream_count ||
+ down_stream_count > MAX_HDCP_DOWN_STREAM_COUNT) {
+ dev_err(dev, "HDCP down stream count Error %d",
+ down_stream_count);
+ return 0;
+ }
+
+ for (i = 0; i < down_stream_count; i++) {
+ err = it6505_get_dpcd(it6505, DP_AUX_HDCP_KSV_FIFO +
+ (i % 3) * DRM_HDCP_KSV_LEN,
+ sha1_input + msg_count,
+ DRM_HDCP_KSV_LEN);
+
+ if (err < 0)
+ return err;
+
+ msg_count += 5;
+ }
+
+ it6505->hdcp_down_stream_count = down_stream_count;
+ sha1_input[msg_count++] = binfo[0];
+ sha1_input[msg_count++] = binfo[1];
+
+ it6505_set_bits(it6505, REG_HDCP_CTRL2, HDCP_EN_M0_READ,
+ HDCP_EN_M0_READ);
+
+ err = regmap_bulk_read(it6505->regmap, REG_M0_0_7,
+ sha1_input + msg_count, 8);
+
+ it6505_set_bits(it6505, REG_HDCP_CTRL2, HDCP_EN_M0_READ, 0x00);
+
+ if (err < 0) {
+ dev_err(dev, " Warning, Read M value Fail");
+ return err;
+ }
+
+ msg_count += 8;
+
+ return msg_count;
+}
+
+static bool it6505_hdcp_part2_ksvlist_check(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+ u8 av[5][4], bv[5][4];
+ int i, err;
+
+ i = it6505_setup_sha1_input(it6505, it6505->sha1_input);
+ if (i <= 0) {
+ dev_err(dev, "SHA-1 Input length error %d", i);
+ return false;
+ }
+
+ it6505_sha1_digest(it6505, it6505->sha1_input, i, (u8 *)av);
+
+ err = it6505_get_dpcd(it6505, DP_AUX_HDCP_V_PRIME(0), (u8 *)bv,
+ sizeof(bv));
+
+ if (err < 0) {
+ dev_err(dev, "Read V' value Fail");
+ return false;
+ }
+
+ for (i = 0; i < 5; i++)
+ if (bv[i][3] != av[i][0] || bv[i][2] != av[i][1] ||
+ bv[i][1] != av[i][2] || bv[i][0] != av[i][3])
+ return false;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "V' all match!!");
+ return true;
+}
+
+static void it6505_hdcp_wait_ksv_list(struct work_struct *work)
+{
+ struct it6505 *it6505 = container_of(work, struct it6505,
+ hdcp_wait_ksv_list);
+ struct device *dev = &it6505->client->dev;
+ unsigned int timeout = 5000;
+ u8 bstatus = 0;
+ bool ksv_list_check;
+
+ timeout /= 20;
+ while (timeout > 0) {
+ if (!it6505_get_sink_hpd_status(it6505))
+ return;
+
+ bstatus = it6505_dpcd_read(it6505, DP_AUX_HDCP_BSTATUS);
+
+ if (bstatus & DP_BSTATUS_READY)
+ break;
+
+ msleep(20);
+ timeout--;
+ }
+
+ if (timeout == 0) {
+ DRM_DEV_DEBUG_DRIVER(dev, "timeout and ksv list wait failed");
+ goto timeout;
+ }
+
+ ksv_list_check = it6505_hdcp_part2_ksvlist_check(it6505);
+ DRM_DEV_DEBUG_DRIVER(dev, "ksv list ready, ksv list check %s",
+ ksv_list_check ? "pass" : "fail");
+ if (ksv_list_check) {
+ it6505_set_bits(it6505, REG_HDCP_TRIGGER,
+ HDCP_TRIGGER_KSV_DONE, HDCP_TRIGGER_KSV_DONE);
+ return;
+ }
+timeout:
+ it6505_set_bits(it6505, REG_HDCP_TRIGGER,
+ HDCP_TRIGGER_KSV_DONE | HDCP_TRIGGER_KSV_FAIL,
+ HDCP_TRIGGER_KSV_DONE | HDCP_TRIGGER_KSV_FAIL);
+}
+
+static void it6505_hdcp_work(struct work_struct *work)
+{
+ struct it6505 *it6505 = container_of(work, struct it6505,
+ hdcp_work.work);
+ struct device *dev = &it6505->client->dev;
+ int ret;
+ u8 link_status[DP_LINK_STATUS_SIZE] = { 0 };
+
+ DRM_DEV_DEBUG_DRIVER(dev, "start");
+
+ if (!it6505_get_sink_hpd_status(it6505))
+ return;
+
+ ret = drm_dp_dpcd_read_link_status(&it6505->aux, link_status);
+ DRM_DEV_DEBUG_DRIVER(dev, "ret: %d link_status: %*ph", ret,
+ (int)sizeof(link_status), link_status);
+
+ if (ret < 0 || !drm_dp_channel_eq_ok(link_status, it6505->lane_count) ||
+ !it6505_get_video_status(it6505)) {
+ DRM_DEV_DEBUG_DRIVER(dev, "link train not done or no video");
+ return;
+ }
+
+ ret = it6505_get_dpcd(it6505, DP_AUX_HDCP_BKSV, it6505->bksvs,
+ ARRAY_SIZE(it6505->bksvs));
+ if (ret < 0) {
+ dev_err(dev, "fail to get bksv ret: %d", ret);
+ it6505_set_bits(it6505, REG_HDCP_TRIGGER,
+ HDCP_TRIGGER_KSV_FAIL, HDCP_TRIGGER_KSV_FAIL);
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "bksv = 0x%*ph",
+ (int)ARRAY_SIZE(it6505->bksvs), it6505->bksvs);
+
+ if (!it6505_hdcp_is_ksv_valid(it6505->bksvs)) {
+ dev_err(dev, "Display Port bksv not valid");
+ it6505_set_bits(it6505, REG_HDCP_TRIGGER,
+ HDCP_TRIGGER_KSV_FAIL, HDCP_TRIGGER_KSV_FAIL);
+ }
+
+ it6505_hdcp_part1_auth(it6505);
+}
+
+static void it6505_show_hdcp_info(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+ int i;
+ u8 *sha1 = it6505->sha1_input;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "hdcp_status: %d is_repeater: %d",
+ it6505->hdcp_status, it6505->is_repeater);
+ DRM_DEV_DEBUG_DRIVER(dev, "bksv = 0x%*ph",
+ (int)ARRAY_SIZE(it6505->bksvs), it6505->bksvs);
+
+ if (it6505->is_repeater) {
+ DRM_DEV_DEBUG_DRIVER(dev, "hdcp_down_stream_count: %d",
+ it6505->hdcp_down_stream_count);
+ DRM_DEV_DEBUG_DRIVER(dev, "sha1_input: 0x%*ph",
+ (int)ARRAY_SIZE(it6505->sha1_input),
+ it6505->sha1_input);
+ for (i = 0; i < it6505->hdcp_down_stream_count; i++) {
+ DRM_DEV_DEBUG_DRIVER(dev, "KSV_%d = 0x%*ph", i,
+ DRM_HDCP_KSV_LEN, sha1);
+ sha1 += DRM_HDCP_KSV_LEN;
+ }
+ DRM_DEV_DEBUG_DRIVER(dev, "binfo: 0x%2ph M0: 0x%8ph",
+ sha1, sha1 + 2);
+ }
+}
+
+static void it6505_stop_link_train(struct it6505 *it6505)
+{
+ it6505->link_state = LINK_IDLE;
+ cancel_work_sync(&it6505->link_works);
+ it6505_write(it6505, REG_TRAIN_CTRL1, FORCE_RETRAIN);
+}
+
+static void it6505_link_train_ok(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+
+ it6505->link_state = LINK_OK;
+ /* disalbe mute enable avi info frame */
+ it6505_set_bits(it6505, REG_DATA_MUTE_CTRL, EN_VID_MUTE, 0x00);
+ it6505_set_bits(it6505, REG_INFOFRAME_CTRL,
+ EN_VID_CTRL_PKT, EN_VID_CTRL_PKT);
+
+ if (it6505_audio_input(it6505)) {
+ DRM_DEV_DEBUG_DRIVER(dev, "Enable audio!");
+ it6505_enable_audio(it6505);
+ }
+
+ if (it6505->hdcp_desired)
+ it6505_start_hdcp(it6505);
+}
+
+static void it6505_link_step_train_process(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+ int ret, i, step_retry = 3;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "Start step train");
+
+ if (it6505->sink_count == 0) {
+ DRM_DEV_DEBUG_DRIVER(dev, "it6505->sink_count:%d, force eq",
+ it6505->sink_count);
+ it6505_set_bits(it6505, REG_TRAIN_CTRL0, FORCE_EQ_DONE,
+ FORCE_EQ_DONE);
+ return;
+ }
+
+ if (!it6505->step_train) {
+ DRM_DEV_DEBUG_DRIVER(dev, "not support step train");
+ return;
+ }
+
+ /* step training start here */
+ for (i = 0; i < step_retry; i++) {
+ it6505_link_reset_step_train(it6505);
+ ret = it6505_link_start_step_train(it6505);
+ DRM_DEV_DEBUG_DRIVER(dev, "step train %s, retry:%d times",
+ ret ? "pass" : "failed", i + 1);
+ if (ret) {
+ it6505_link_train_ok(it6505);
+ return;
+ }
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "training fail");
+ it6505->link_state = LINK_IDLE;
+ it6505_video_reset(it6505);
+}
+
+static void it6505_link_training_work(struct work_struct *work)
+{
+ struct it6505 *it6505 = container_of(work, struct it6505, link_works);
+ struct device *dev = &it6505->client->dev;
+ int ret;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "it6505->sink_count: %d",
+ it6505->sink_count);
+
+ if (!it6505_get_sink_hpd_status(it6505))
+ return;
+
+ it6505_link_training_setup(it6505);
+ it6505_reset_hdcp(it6505);
+ it6505_aux_reset(it6505);
+
+ if (it6505->auto_train_retry < 1) {
+ it6505_link_step_train_process(it6505);
+ return;
+ }
+
+ ret = it6505_link_start_auto_train(it6505);
+ DRM_DEV_DEBUG_DRIVER(dev, "auto train %s, auto_train_retry: %d",
+ ret ? "pass" : "failed", it6505->auto_train_retry);
+ it6505->auto_train_retry--;
+
+ if (ret) {
+ it6505_link_train_ok(it6505);
+ return;
+ }
+
+ it6505_dump(it6505);
+}
+
+static void it6505_plugged_status_to_codec(struct it6505 *it6505)
+{
+ enum drm_connector_status status = it6505->connector_status;
+
+ if (it6505->plugged_cb && it6505->codec_dev)
+ it6505->plugged_cb(it6505->codec_dev,
+ status == connector_status_connected);
+}
+
+static int it6505_process_hpd_irq(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+ int ret, dpcd_sink_count, dp_irq_vector, bstatus;
+ u8 link_status[DP_LINK_STATUS_SIZE];
+
+ if (!it6505_get_sink_hpd_status(it6505)) {
+ DRM_DEV_DEBUG_DRIVER(dev, "HPD_IRQ HPD low");
+ it6505->sink_count = 0;
+ return 0;
+ }
+
+ ret = it6505_dpcd_read(it6505, DP_SINK_COUNT);
+ if (ret < 0)
+ return ret;
+
+ dpcd_sink_count = DP_GET_SINK_COUNT(ret);
+ DRM_DEV_DEBUG_DRIVER(dev, "dpcd_sink_count: %d it6505->sink_count:%d",
+ dpcd_sink_count, it6505->sink_count);
+
+ if (it6505->branch_device && dpcd_sink_count != it6505->sink_count) {
+ memset(it6505->dpcd, 0, sizeof(it6505->dpcd));
+ it6505->sink_count = dpcd_sink_count;
+ it6505_reset_logic(it6505);
+ it6505_int_mask_enable(it6505);
+ it6505_init(it6505);
+ return 0;
+ }
+
+ dp_irq_vector = it6505_dpcd_read(it6505, DP_DEVICE_SERVICE_IRQ_VECTOR);
+ if (dp_irq_vector < 0)
+ return dp_irq_vector;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "dp_irq_vector = 0x%02x", dp_irq_vector);
+
+ if (dp_irq_vector & DP_CP_IRQ) {
+ it6505_set_bits(it6505, REG_HDCP_TRIGGER, HDCP_TRIGGER_CPIRQ,
+ HDCP_TRIGGER_CPIRQ);
+
+ bstatus = it6505_dpcd_read(it6505, DP_AUX_HDCP_BSTATUS);
+ if (bstatus < 0)
+ return bstatus;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "Bstatus = 0x%02x", bstatus);
+ }
+
+ ret = drm_dp_dpcd_read_link_status(&it6505->aux, link_status);
+ if (ret < 0) {
+ dev_err(dev, "Fail to read link status ret: %d", ret);
+ return ret;
+ }
+
+ DRM_DEV_DEBUG_DRIVER(dev, "link status = 0x%*ph",
+ (int)ARRAY_SIZE(link_status), link_status);
+
+ if (!drm_dp_channel_eq_ok(link_status, it6505->lane_count)) {
+ it6505->auto_train_retry = AUTO_TRAIN_RETRY;
+ it6505_video_reset(it6505);
+ }
+
+ return 0;
+}
+
+static void it6505_irq_hpd(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+
+ it6505->hpd_state = it6505_get_sink_hpd_status(it6505);
+ DRM_DEV_DEBUG_DRIVER(dev, "hpd change interrupt, change to %s",
+ it6505->hpd_state ? "high" : "low");
+
+ if (it6505->bridge.dev)
+ drm_helper_hpd_irq_event(it6505->bridge.dev);
+ DRM_DEV_DEBUG_DRIVER(dev, "it6505->sink_count: %d",
+ it6505->sink_count);
+
+ if (it6505->hpd_state) {
+ wait_for_completion_timeout(&it6505->wait_edid_complete,
+ msecs_to_jiffies(6000));
+ it6505_lane_termination_on(it6505);
+ it6505_lane_power_on(it6505);
+
+ /*
+ * for some dongle which issue HPD_irq
+ * when sink count change from 0->1
+ * it6505 not able to receive HPD_IRQ
+ * if HW never go into trainig done
+ */
+
+ if (it6505->branch_device && it6505->sink_count == 0)
+ schedule_work(&it6505->link_works);
+
+ if (!it6505_get_video_status(it6505))
+ it6505_video_reset(it6505);
+ } else {
+ memset(it6505->dpcd, 0, sizeof(it6505->dpcd));
+
+ if (it6505->hdcp_desired)
+ it6505_stop_hdcp(it6505);
+
+ it6505_video_disable(it6505);
+ it6505_disable_audio(it6505);
+ it6505_stop_link_train(it6505);
+ it6505_lane_off(it6505);
+ it6505_link_reset_step_train(it6505);
+ }
+}
+
+static void it6505_irq_hpd_irq(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "hpd_irq interrupt");
+
+ if (it6505_process_hpd_irq(it6505) < 0)
+ DRM_DEV_DEBUG_DRIVER(dev, "process hpd_irq fail!");
+}
+
+static void it6505_irq_scdt(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+ bool data;
+
+ data = it6505_get_video_status(it6505);
+ DRM_DEV_DEBUG_DRIVER(dev, "video stable change interrupt, %s",
+ data ? "stable" : "unstable");
+ it6505_calc_video_info(it6505);
+ it6505_link_reset_step_train(it6505);
+
+ if (data)
+ schedule_work(&it6505->link_works);
+}
+
+static void it6505_irq_hdcp_done(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "hdcp done interrupt");
+ it6505->hdcp_status = HDCP_AUTH_DONE;
+ it6505_show_hdcp_info(it6505);
+}
+
+static void it6505_irq_hdcp_fail(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "hdcp fail interrupt");
+ it6505->hdcp_status = HDCP_AUTH_IDLE;
+ it6505_show_hdcp_info(it6505);
+ it6505_start_hdcp(it6505);
+}
+
+static void it6505_irq_aux_cmd_fail(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "AUX PC Request Fail Interrupt");
+}
+
+static void it6505_irq_hdcp_ksv_check(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "HDCP event Interrupt");
+ schedule_work(&it6505->hdcp_wait_ksv_list);
+}
+
+static void it6505_irq_audio_fifo_error(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "audio fifo error Interrupt");
+
+ if (it6505_audio_input(it6505))
+ it6505_enable_audio(it6505);
+}
+
+static void it6505_irq_link_train_fail(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "link training fail interrupt");
+ schedule_work(&it6505->link_works);
+}
+
+static void it6505_irq_video_fifo_error(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "video fifo overflow interrupt");
+ it6505->auto_train_retry = AUTO_TRAIN_RETRY;
+ flush_work(&it6505->link_works);
+ it6505_stop_hdcp(it6505);
+ it6505_video_reset(it6505);
+}
+
+static void it6505_irq_io_latch_fifo_overflow(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "IO latch fifo overflow interrupt");
+ it6505->auto_train_retry = AUTO_TRAIN_RETRY;
+ flush_work(&it6505->link_works);
+ it6505_stop_hdcp(it6505);
+ it6505_video_reset(it6505);
+}
+
+static bool it6505_test_bit(unsigned int bit, const unsigned int *addr)
+{
+ return 1 & (addr[bit / BITS_PER_BYTE] >> (bit % BITS_PER_BYTE));
+}
+
+static irqreturn_t it6505_int_threaded_handler(int unused, void *data)
+{
+ struct it6505 *it6505 = data;
+ struct device *dev = &it6505->client->dev;
+ static const struct {
+ int bit;
+ void (*handler)(struct it6505 *it6505);
+ } irq_vec[] = {
+ { BIT_INT_HPD, it6505_irq_hpd },
+ { BIT_INT_HPD_IRQ, it6505_irq_hpd_irq },
+ { BIT_INT_SCDT, it6505_irq_scdt },
+ { BIT_INT_HDCP_FAIL, it6505_irq_hdcp_fail },
+ { BIT_INT_HDCP_DONE, it6505_irq_hdcp_done },
+ { BIT_INT_AUX_CMD_FAIL, it6505_irq_aux_cmd_fail },
+ { BIT_INT_HDCP_KSV_CHECK, it6505_irq_hdcp_ksv_check },
+ { BIT_INT_AUDIO_FIFO_ERROR, it6505_irq_audio_fifo_error },
+ { BIT_INT_LINK_TRAIN_FAIL, it6505_irq_link_train_fail },
+ { BIT_INT_VID_FIFO_ERROR, it6505_irq_video_fifo_error },
+ { BIT_INT_IO_FIFO_OVERFLOW, it6505_irq_io_latch_fifo_overflow },
+ };
+ int int_status[3], i;
+
+ msleep(100);
+ mutex_lock(&it6505->extcon_lock);
+
+ if (it6505->enable_drv_hold || !it6505->powered)
+ goto unlock;
+
+ int_status[0] = it6505_read(it6505, INT_STATUS_01);
+ int_status[1] = it6505_read(it6505, INT_STATUS_02);
+ int_status[2] = it6505_read(it6505, INT_STATUS_03);
+
+ it6505_write(it6505, INT_STATUS_01, int_status[0]);
+ it6505_write(it6505, INT_STATUS_02, int_status[1]);
+ it6505_write(it6505, INT_STATUS_03, int_status[2]);
+
+ DRM_DEV_DEBUG_DRIVER(dev, "reg06 = 0x%02x", int_status[0]);
+ DRM_DEV_DEBUG_DRIVER(dev, "reg07 = 0x%02x", int_status[1]);
+ DRM_DEV_DEBUG_DRIVER(dev, "reg08 = 0x%02x", int_status[2]);
+ it6505_debug_print(it6505, REG_SYSTEM_STS, "");
+
+ if (it6505_test_bit(irq_vec[0].bit, (unsigned int *)int_status))
+ irq_vec[0].handler(it6505);
+
+ if (!it6505->hpd_state)
+ goto unlock;
+
+ for (i = 1; i < ARRAY_SIZE(irq_vec); i++) {
+ if (it6505_test_bit(irq_vec[i].bit, (unsigned int *)int_status))
+ irq_vec[i].handler(it6505);
+ }
+
+unlock:
+ mutex_unlock(&it6505->extcon_lock);
+
+ return IRQ_HANDLED;
+}
+
+static int it6505_poweron(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+ struct it6505_platform_data *pdata = &it6505->pdata;
+ int err;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "it6505 start powered on");
+
+ if (it6505->powered) {
+ DRM_DEV_DEBUG_DRIVER(dev, "it6505 already powered on");
+ return 0;
+ }
+
+ if (pdata->pwr18) {
+ err = regulator_enable(pdata->pwr18);
+ if (err) {
+ DRM_DEV_DEBUG_DRIVER(dev, "Failed to enable VDD18: %d",
+ err);
+ return err;
+ }
+ }
+
+ if (pdata->ovdd) {
+ /* time interval between IVDD and OVDD at least be 1ms */
+ usleep_range(1000, 2000);
+ err = regulator_enable(pdata->ovdd);
+ if (err) {
+ regulator_disable(pdata->pwr18);
+ return err;
+ }
+ }
+ /* time interval between OVDD and SYSRSTN at least be 10ms */
+ if (pdata->gpiod_reset) {
+ usleep_range(10000, 20000);
+ gpiod_set_value_cansleep(pdata->gpiod_reset, 0);
+ usleep_range(1000, 2000);
+ gpiod_set_value_cansleep(pdata->gpiod_reset, 1);
+ usleep_range(10000, 20000);
+ }
+
+ it6505->powered = true;
+ it6505_reset_logic(it6505);
+ it6505_int_mask_enable(it6505);
+ it6505_init(it6505);
+ it6505_lane_off(it6505);
+
+ return 0;
+}
+
+static int it6505_poweroff(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+ struct it6505_platform_data *pdata = &it6505->pdata;
+ int err;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "it6505 start power off");
+
+ if (!it6505->powered) {
+ DRM_DEV_DEBUG_DRIVER(dev, "power had been already off");
+ return 0;
+ }
+
+ if (pdata->gpiod_reset)
+ gpiod_set_value_cansleep(pdata->gpiod_reset, 0);
+
+ if (pdata->pwr18) {
+ err = regulator_disable(pdata->pwr18);
+ if (err)
+ return err;
+ }
+
+ if (pdata->ovdd) {
+ err = regulator_disable(pdata->ovdd);
+ if (err)
+ return err;
+ }
+
+ it6505->powered = false;
+ it6505->sink_count = 0;
+
+ return 0;
+}
+
+static enum drm_connector_status it6505_detect(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+ enum drm_connector_status status = connector_status_disconnected;
+ int dp_sink_count;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "it6505->sink_count:%d powered:%d",
+ it6505->sink_count, it6505->powered);
+
+ mutex_lock(&it6505->mode_lock);
+
+ if (!it6505->powered)
+ goto unlock;
+
+ if (it6505->enable_drv_hold) {
+ status = it6505_get_sink_hpd_status(it6505) ?
+ connector_status_connected :
+ connector_status_disconnected;
+ goto unlock;
+ }
+
+ if (it6505_get_sink_hpd_status(it6505)) {
+ it6505_aux_on(it6505);
+ it6505_drm_dp_link_probe(&it6505->aux, &it6505->link);
+ it6505_drm_dp_link_set_power(&it6505->aux, &it6505->link,
+ DP_SET_POWER_D0);
+ it6505->auto_train_retry = AUTO_TRAIN_RETRY;
+
+ if (it6505->dpcd[0] == 0) {
+ it6505_get_dpcd(it6505, DP_DPCD_REV, it6505->dpcd,
+ ARRAY_SIZE(it6505->dpcd));
+ it6505_variable_config(it6505);
+ it6505_parse_link_capabilities(it6505);
+ }
+
+ dp_sink_count = it6505_dpcd_read(it6505, DP_SINK_COUNT);
+ it6505->sink_count = DP_GET_SINK_COUNT(dp_sink_count);
+ DRM_DEV_DEBUG_DRIVER(dev, "it6505->sink_count:%d branch:%d",
+ it6505->sink_count, it6505->branch_device);
+
+ if (it6505->branch_device) {
+ status = (it6505->sink_count != 0) ?
+ connector_status_connected :
+ connector_status_disconnected;
+ } else {
+ status = connector_status_connected;
+ }
+ } else {
+ it6505->sink_count = 0;
+ memset(it6505->dpcd, 0, sizeof(it6505->dpcd));
+ }
+
+unlock:
+ if (it6505->connector_status != status) {
+ it6505->connector_status = status;
+ it6505_plugged_status_to_codec(it6505);
+ }
+
+ mutex_unlock(&it6505->mode_lock);
+
+ return status;
+}
+
+static int it6505_extcon_notifier(struct notifier_block *self,
+ unsigned long event, void *ptr)
+{
+ struct it6505 *it6505 = container_of(self, struct it6505, event_nb);
+
+ schedule_work(&it6505->extcon_wq);
+ return NOTIFY_DONE;
+}
+
+static void it6505_extcon_work(struct work_struct *work)
+{
+ struct it6505 *it6505 = container_of(work, struct it6505, extcon_wq);
+ struct device *dev = &it6505->client->dev;
+ int state = extcon_get_state(it6505->extcon, EXTCON_DISP_DP);
+ unsigned int pwroffretry = 0;
+
+ if (it6505->enable_drv_hold)
+ return;
+
+ mutex_lock(&it6505->extcon_lock);
+
+ DRM_DEV_DEBUG_DRIVER(dev, "EXTCON_DISP_DP = 0x%02x", state);
+ if (state > 0) {
+ DRM_DEV_DEBUG_DRIVER(dev, "start to power on");
+ msleep(100);
+ it6505_poweron(it6505);
+ } else {
+ DRM_DEV_DEBUG_DRIVER(dev, "start to power off");
+ while (it6505_poweroff(it6505) && pwroffretry++ < 5) {
+ DRM_DEV_DEBUG_DRIVER(dev, "power off fail %d times",
+ pwroffretry);
+ }
+
+ drm_helper_hpd_irq_event(it6505->bridge.dev);
+ memset(it6505->dpcd, 0, sizeof(it6505->dpcd));
+ DRM_DEV_DEBUG_DRIVER(dev, "power off it6505 success!");
+ }
+
+ mutex_unlock(&it6505->extcon_lock);
+}
+
+static int it6505_use_notifier_module(struct it6505 *it6505)
+{
+ int ret;
+ struct device *dev = &it6505->client->dev;
+
+ it6505->event_nb.notifier_call = it6505_extcon_notifier;
+ INIT_WORK(&it6505->extcon_wq, it6505_extcon_work);
+ ret = devm_extcon_register_notifier(&it6505->client->dev,
+ it6505->extcon, EXTCON_DISP_DP,
+ &it6505->event_nb);
+ if (ret) {
+ dev_err(dev, "failed to register notifier for DP");
+ return ret;
+ }
+
+ schedule_work(&it6505->extcon_wq);
+
+ return 0;
+}
+
+static void it6505_remove_notifier_module(struct it6505 *it6505)
+{
+ if (it6505->extcon) {
+ devm_extcon_unregister_notifier(&it6505->client->dev,
+ it6505->extcon, EXTCON_DISP_DP,
+ &it6505->event_nb);
+
+ flush_work(&it6505->extcon_wq);
+ }
+}
+
+static void __maybe_unused it6505_delayed_audio(struct work_struct *work)
+{
+ struct it6505 *it6505 = container_of(work, struct it6505,
+ delayed_audio.work);
+
+ DRM_DEV_DEBUG_DRIVER(&it6505->client->dev, "start");
+
+ if (!it6505->powered)
+ return;
+
+ if (!it6505->enable_drv_hold)
+ it6505_enable_audio(it6505);
+}
+
+static int __maybe_unused it6505_audio_setup_hw_params(struct it6505 *it6505,
+ struct hdmi_codec_params
+ *params)
+{
+ struct device *dev = &it6505->client->dev;
+ int i = 0;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "%s %d Hz, %d bit, %d channels\n", __func__,
+ params->sample_rate, params->sample_width,
+ params->cea.channels);
+
+ if (!it6505->bridge.encoder)
+ return -ENODEV;
+
+ if (params->cea.channels <= 1 || params->cea.channels > 8) {
+ DRM_DEV_DEBUG_DRIVER(dev, "channel number: %d not support",
+ it6505->audio.channel_count);
+ return -EINVAL;
+ }
+
+ it6505->audio.channel_count = params->cea.channels;
+
+ while (i < ARRAY_SIZE(audio_sample_rate_map) &&
+ params->sample_rate !=
+ audio_sample_rate_map[i].sample_rate_value) {
+ i++;
+ }
+ if (i == ARRAY_SIZE(audio_sample_rate_map)) {
+ DRM_DEV_DEBUG_DRIVER(dev, "sample rate: %d Hz not support",
+ params->sample_rate);
+ return -EINVAL;
+ }
+ it6505->audio.sample_rate = audio_sample_rate_map[i].rate;
+
+ switch (params->sample_width) {
+ case 16:
+ it6505->audio.word_length = WORD_LENGTH_16BIT;
+ break;
+ case 18:
+ it6505->audio.word_length = WORD_LENGTH_18BIT;
+ break;
+ case 20:
+ it6505->audio.word_length = WORD_LENGTH_20BIT;
+ break;
+ case 24:
+ case 32:
+ it6505->audio.word_length = WORD_LENGTH_24BIT;
+ break;
+ default:
+ DRM_DEV_DEBUG_DRIVER(dev, "wordlength: %d bit not support",
+ params->sample_width);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void __maybe_unused it6505_audio_shutdown(struct device *dev, void *data)
+{
+ struct it6505 *it6505 = dev_get_drvdata(dev);
+
+ if (it6505->powered)
+ it6505_disable_audio(it6505);
+}
+
+static int __maybe_unused it6505_audio_hook_plugged_cb(struct device *dev,
+ void *data,
+ hdmi_codec_plugged_cb fn,
+ struct device *codec_dev)
+{
+ struct it6505 *it6505 = data;
+
+ it6505->plugged_cb = fn;
+ it6505->codec_dev = codec_dev;
+ it6505_plugged_status_to_codec(it6505);
+
+ return 0;
+}
+
+static inline struct it6505 *bridge_to_it6505(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct it6505, bridge);
+}
+
+static int it6505_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct it6505 *it6505 = bridge_to_it6505(bridge);
+ struct device *dev = &it6505->client->dev;
+ int ret;
+
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+ DRM_ERROR("DRM_BRIDGE_ATTACH_NO_CONNECTOR must be supplied");
+ return -EINVAL;
+ }
+
+ if (!bridge->encoder) {
+ dev_err(dev, "Parent encoder object not found");
+ return -ENODEV;
+ }
+
+ /* Register aux channel */
+ it6505->aux.drm_dev = bridge->dev;
+
+ ret = drm_dp_aux_register(&it6505->aux);
+
+ if (ret < 0) {
+ dev_err(dev, "Failed to register aux: %d", ret);
+ return ret;
+ }
+
+ if (it6505->extcon) {
+ ret = it6505_use_notifier_module(it6505);
+ if (ret < 0) {
+ dev_err(dev, "use notifier module failed");
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static void it6505_bridge_detach(struct drm_bridge *bridge)
+{
+ struct it6505 *it6505 = bridge_to_it6505(bridge);
+
+ flush_work(&it6505->link_works);
+ it6505_remove_notifier_module(it6505);
+}
+
+static enum drm_mode_status
+it6505_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct it6505 *it6505 = bridge_to_it6505(bridge);
+
+ if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+ return MODE_NO_INTERLACE;
+
+ if (mode->clock > DPI_PIXEL_CLK_MAX)
+ return MODE_CLOCK_HIGH;
+
+ it6505->video_info.clock = mode->clock;
+
+ return MODE_OK;
+}
+
+static void it6505_bridge_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_state)
+{
+ struct it6505 *it6505 = bridge_to_it6505(bridge);
+ struct device *dev = &it6505->client->dev;
+ struct drm_atomic_state *state = old_state->base.state;
+ struct hdmi_avi_infoframe frame;
+ struct drm_crtc_state *crtc_state;
+ struct drm_connector_state *conn_state;
+ struct drm_display_mode *mode;
+ struct drm_connector *connector;
+ int ret;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "start");
+
+ connector = drm_atomic_get_new_connector_for_encoder(state,
+ bridge->encoder);
+
+ if (WARN_ON(!connector))
+ return;
+
+ conn_state = drm_atomic_get_new_connector_state(state, connector);
+
+ if (WARN_ON(!conn_state))
+ return;
+
+ crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
+
+ if (WARN_ON(!crtc_state))
+ return;
+
+ mode = &crtc_state->adjusted_mode;
+
+ if (WARN_ON(!mode))
+ return;
+
+ ret = drm_hdmi_avi_infoframe_from_display_mode(&frame,
+ connector,
+ mode);
+ if (ret)
+ dev_err(dev, "Failed to setup AVI infoframe: %d", ret);
+
+ it6505_update_video_parameter(it6505, mode);
+
+ ret = it6505_send_video_infoframe(it6505, &frame);
+
+ if (ret)
+ dev_err(dev, "Failed to send AVI infoframe: %d", ret);
+
+ it6505_int_mask_enable(it6505);
+ it6505_video_reset(it6505);
+
+ it6505_drm_dp_link_set_power(&it6505->aux, &it6505->link,
+ DP_SET_POWER_D0);
+}
+
+static void it6505_bridge_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_state)
+{
+ struct it6505 *it6505 = bridge_to_it6505(bridge);
+ struct device *dev = &it6505->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "start");
+
+ if (it6505->powered) {
+ it6505_drm_dp_link_set_power(&it6505->aux, &it6505->link,
+ DP_SET_POWER_D3);
+ it6505_video_disable(it6505);
+ }
+}
+
+static enum drm_connector_status
+it6505_bridge_detect(struct drm_bridge *bridge)
+{
+ struct it6505 *it6505 = bridge_to_it6505(bridge);
+
+ return it6505_detect(it6505);
+}
+
+static struct edid *it6505_bridge_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct it6505 *it6505 = bridge_to_it6505(bridge);
+ struct device *dev = &it6505->client->dev;
+ struct edid *edid;
+
+ edid = drm_do_get_edid(connector, it6505_get_edid_block, it6505);
+
+ if (!edid) {
+ DRM_DEV_DEBUG_DRIVER(dev, "failed to get edid!");
+ return NULL;
+ }
+
+ return edid;
+}
+
+static const struct drm_bridge_funcs it6505_bridge_funcs = {
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .attach = it6505_bridge_attach,
+ .detach = it6505_bridge_detach,
+ .mode_valid = it6505_bridge_mode_valid,
+ .atomic_enable = it6505_bridge_atomic_enable,
+ .atomic_disable = it6505_bridge_atomic_disable,
+ .detect = it6505_bridge_detect,
+ .get_edid = it6505_bridge_get_edid,
+};
+
+static __maybe_unused int it6505_bridge_resume(struct device *dev)
+{
+ struct it6505 *it6505 = dev_get_drvdata(dev);
+
+ return it6505_poweron(it6505);
+}
+
+static __maybe_unused int it6505_bridge_suspend(struct device *dev)
+{
+ struct it6505 *it6505 = dev_get_drvdata(dev);
+
+ return it6505_poweroff(it6505);
+}
+
+static SIMPLE_DEV_PM_OPS(it6505_bridge_pm_ops, it6505_bridge_suspend,
+ it6505_bridge_resume);
+
+static int it6505_init_pdata(struct it6505 *it6505)
+{
+ struct it6505_platform_data *pdata = &it6505->pdata;
+ struct device *dev = &it6505->client->dev;
+
+ /* 1.0V digital core power regulator */
+ pdata->pwr18 = devm_regulator_get(dev, "pwr18");
+ if (IS_ERR(pdata->pwr18)) {
+ dev_err(dev, "pwr18 regulator not found");
+ return PTR_ERR(pdata->pwr18);
+ }
+
+ pdata->ovdd = devm_regulator_get(dev, "ovdd");
+ if (IS_ERR(pdata->ovdd)) {
+ dev_err(dev, "ovdd regulator not found");
+ return PTR_ERR(pdata->ovdd);
+ }
+
+ pdata->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(pdata->gpiod_reset)) {
+ dev_err(dev, "gpiod_reset gpio not found");
+ return PTR_ERR(pdata->gpiod_reset);
+ }
+
+ return 0;
+}
+
+static void it6505_parse_dt(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+ u32 *afe_setting = &it6505->afe_setting;
+
+ it6505->lane_swap_disabled =
+ device_property_read_bool(dev, "no-laneswap");
+
+ if (it6505->lane_swap_disabled)
+ it6505->lane_swap = false;
+
+ if (device_property_read_u32(dev, "afe-setting", afe_setting) == 0) {
+ if (*afe_setting >= ARRAY_SIZE(afe_setting_table)) {
+ dev_err(dev, "afe setting error, use default");
+ *afe_setting = 0;
+ }
+ } else {
+ *afe_setting = 0;
+ }
+ DRM_DEV_DEBUG_DRIVER(dev, "using afe_setting: %d", *afe_setting);
+}
+
+static ssize_t receive_timing_debugfs_show(struct file *file, char __user *buf,
+ size_t len, loff_t *ppos)
+{
+ struct it6505 *it6505 = file->private_data;
+ struct drm_display_mode *vid;
+ u8 read_buf[READ_BUFFER_SIZE];
+ u8 *str = read_buf, *end = read_buf + READ_BUFFER_SIZE;
+ ssize_t ret, count;
+
+ if (!it6505)
+ return -ENODEV;
+
+ it6505_calc_video_info(it6505);
+ vid = &it6505->video_info;
+ str += scnprintf(str, end - str, "---video timing---\n");
+ str += scnprintf(str, end - str, "PCLK:%d.%03dMHz\n",
+ vid->clock / 1000, vid->clock % 1000);
+ str += scnprintf(str, end - str, "HTotal:%d\n", vid->htotal);
+ str += scnprintf(str, end - str, "HActive:%d\n", vid->hdisplay);
+ str += scnprintf(str, end - str, "HFrontPorch:%d\n",
+ vid->hsync_start - vid->hdisplay);
+ str += scnprintf(str, end - str, "HSyncWidth:%d\n",
+ vid->hsync_end - vid->hsync_start);
+ str += scnprintf(str, end - str, "HBackPorch:%d\n",
+ vid->htotal - vid->hsync_end);
+ str += scnprintf(str, end - str, "VTotal:%d\n", vid->vtotal);
+ str += scnprintf(str, end - str, "VActive:%d\n", vid->vdisplay);
+ str += scnprintf(str, end - str, "VFrontPorch:%d\n",
+ vid->vsync_start - vid->vdisplay);
+ str += scnprintf(str, end - str, "VSyncWidth:%d\n",
+ vid->vsync_end - vid->vsync_start);
+ str += scnprintf(str, end - str, "VBackPorch:%d\n",
+ vid->vtotal - vid->vsync_end);
+
+ count = str - read_buf;
+ ret = simple_read_from_buffer(buf, len, ppos, read_buf, count);
+
+ return ret;
+}
+
+static int force_power_on_off_debugfs_write(void *data, u64 value)
+{
+ struct it6505 *it6505 = data;
+
+ if (!it6505)
+ return -ENODEV;
+
+ if (value)
+ it6505_poweron(it6505);
+ else
+ it6505_poweroff(it6505);
+
+ return 0;
+}
+
+static int enable_drv_hold_debugfs_show(void *data, u64 *buf)
+{
+ struct it6505 *it6505 = data;
+
+ if (!it6505)
+ return -ENODEV;
+
+ *buf = it6505->enable_drv_hold;
+
+ return 0;
+}
+
+static int enable_drv_hold_debugfs_write(void *data, u64 drv_hold)
+{
+ struct it6505 *it6505 = data;
+
+ if (!it6505)
+ return -ENODEV;
+
+ it6505->enable_drv_hold = drv_hold;
+
+ if (it6505->enable_drv_hold) {
+ it6505_int_mask_disable(it6505);
+ } else {
+ it6505_clear_int(it6505);
+ it6505_int_mask_enable(it6505);
+
+ if (it6505->powered) {
+ it6505->connector_status =
+ it6505_get_sink_hpd_status(it6505) ?
+ connector_status_connected :
+ connector_status_disconnected;
+ } else {
+ it6505->connector_status =
+ connector_status_disconnected;
+ }
+ }
+
+ return 0;
+}
+
+static const struct file_operations receive_timing_fops = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .read = receive_timing_debugfs_show,
+ .llseek = default_llseek,
+};
+
+DEFINE_DEBUGFS_ATTRIBUTE(fops_force_power, NULL,
+ force_power_on_off_debugfs_write, "%llu\n");
+
+DEFINE_DEBUGFS_ATTRIBUTE(fops_enable_drv_hold, enable_drv_hold_debugfs_show,
+ enable_drv_hold_debugfs_write, "%llu\n");
+
+static const struct debugfs_entries debugfs_entry[] = {
+ { "receive_timing", &receive_timing_fops },
+ { "force_power_on_off", &fops_force_power },
+ { "enable_drv_hold", &fops_enable_drv_hold },
+ { NULL, NULL },
+};
+
+static void debugfs_create_files(struct it6505 *it6505)
+{
+ int i = 0;
+
+ while (debugfs_entry[i].name && debugfs_entry[i].fops) {
+ debugfs_create_file(debugfs_entry[i].name, 0644,
+ it6505->debugfs, it6505,
+ debugfs_entry[i].fops);
+ i++;
+ }
+}
+
+static void debugfs_init(struct it6505 *it6505)
+{
+ struct device *dev = &it6505->client->dev;
+
+ it6505->debugfs = debugfs_create_dir(DEBUGFS_DIR_NAME, NULL);
+
+ if (IS_ERR(it6505->debugfs)) {
+ dev_err(dev, "failed to create debugfs root");
+ return;
+ }
+
+ debugfs_create_files(it6505);
+}
+
+static void it6505_debugfs_remove(struct it6505 *it6505)
+{
+ debugfs_remove_recursive(it6505->debugfs);
+}
+
+static void it6505_shutdown(struct i2c_client *client)
+{
+ struct it6505 *it6505 = dev_get_drvdata(&client->dev);
+
+ if (it6505->powered)
+ it6505_lane_off(it6505);
+}
+
+static int it6505_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct it6505 *it6505;
+ struct device *dev = &client->dev;
+ struct extcon_dev *extcon;
+ int err, intp_irq;
+
+ it6505 = devm_kzalloc(&client->dev, sizeof(*it6505), GFP_KERNEL);
+ if (!it6505)
+ return -ENOMEM;
+
+ mutex_init(&it6505->extcon_lock);
+ mutex_init(&it6505->mode_lock);
+ mutex_init(&it6505->aux_lock);
+
+ it6505->bridge.of_node = client->dev.of_node;
+ it6505->connector_status = connector_status_disconnected;
+ it6505->client = client;
+ i2c_set_clientdata(client, it6505);
+
+ /* get extcon device from DTS */
+ extcon = extcon_get_edev_by_phandle(dev, 0);
+ if (PTR_ERR(extcon) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (IS_ERR(extcon)) {
+ dev_err(dev, "can not get extcon device!");
+ return PTR_ERR(extcon);
+ }
+
+ it6505->extcon = extcon;
+
+ it6505->regmap = devm_regmap_init_i2c(client, &it6505_regmap_config);
+ if (IS_ERR(it6505->regmap)) {
+ dev_err(dev, "regmap i2c init failed");
+ err = PTR_ERR(it6505->regmap);
+ return err;
+ }
+
+ err = it6505_init_pdata(it6505);
+ if (err) {
+ dev_err(dev, "Failed to initialize pdata: %d", err);
+ return err;
+ }
+
+ it6505_parse_dt(it6505);
+
+ intp_irq = client->irq;
+
+ if (!intp_irq) {
+ dev_err(dev, "Failed to get INTP IRQ");
+ err = -ENODEV;
+ return err;
+ }
+
+ err = devm_request_threaded_irq(&client->dev, intp_irq, NULL,
+ it6505_int_threaded_handler,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ "it6505-intp", it6505);
+ if (err) {
+ dev_err(dev, "Failed to request INTP threaded IRQ: %d", err);
+ return err;
+ }
+
+ INIT_WORK(&it6505->link_works, it6505_link_training_work);
+ INIT_WORK(&it6505->hdcp_wait_ksv_list, it6505_hdcp_wait_ksv_list);
+ INIT_DELAYED_WORK(&it6505->hdcp_work, it6505_hdcp_work);
+ init_completion(&it6505->wait_edid_complete);
+ memset(it6505->dpcd, 0, sizeof(it6505->dpcd));
+ it6505->powered = false;
+ it6505->enable_drv_hold = DEFAULT_DRV_HOLD;
+
+ if (DEFAULT_PWR_ON)
+ it6505_poweron(it6505);
+
+ DRM_DEV_DEBUG_DRIVER(dev, "it6505 device name: %s", dev_name(dev));
+ debugfs_init(it6505);
+
+ it6505->aux.name = "DP-AUX";
+ it6505->aux.dev = dev;
+ it6505->aux.transfer = it6505_aux_transfer;
+ drm_dp_aux_init(&it6505->aux);
+
+ it6505->bridge.funcs = &it6505_bridge_funcs;
+ it6505->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
+ it6505->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
+ DRM_BRIDGE_OP_HPD;
+ drm_bridge_add(&it6505->bridge);
+
+ return 0;
+}
+
+static void it6505_i2c_remove(struct i2c_client *client)
+{
+ struct it6505 *it6505 = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&it6505->bridge);
+ drm_dp_aux_unregister(&it6505->aux);
+ it6505_debugfs_remove(it6505);
+ it6505_poweroff(it6505);
+}
+
+static const struct i2c_device_id it6505_id[] = {
+ { "it6505", 0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, it6505_id);
+
+static const struct of_device_id it6505_of_match[] = {
+ { .compatible = "ite,it6505" },
+ { }
+};
+
+static struct i2c_driver it6505_i2c_driver = {
+ .driver = {
+ .name = "it6505",
+ .of_match_table = it6505_of_match,
+ .pm = &it6505_bridge_pm_ops,
+ },
+ .probe = it6505_i2c_probe,
+ .remove = it6505_i2c_remove,
+ .shutdown = it6505_shutdown,
+ .id_table = it6505_id,
+};
+
+module_i2c_driver(it6505_i2c_driver);
+
+MODULE_AUTHOR("Allen Chen <allen.chen@ite.com.tw>");
+MODULE_DESCRIPTION("IT6505 DisplayPort Transmitter driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/ite-it66121.c b/drivers/gpu/drm/bridge/ite-it66121.c
new file mode 100644
index 000000000..9d7f3c997
--- /dev/null
+++ b/drivers/gpu/drm/bridge/ite-it66121.c
@@ -0,0 +1,1665 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 BayLibre, SAS
+ * Author: Phong LE <ple@baylibre.com>
+ * Copyright (C) 2018-2019, Artem Mygaiev
+ * Copyright (C) 2017, Fresco Logic, Incorporated.
+ *
+ */
+
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/bitfield.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/of_graph.h>
+#include <linux/gpio/consumer.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include <sound/hdmi-codec.h>
+
+#define IT66121_VENDOR_ID0_REG 0x00
+#define IT66121_VENDOR_ID1_REG 0x01
+#define IT66121_DEVICE_ID0_REG 0x02
+#define IT66121_DEVICE_ID1_REG 0x03
+
+#define IT66121_VENDOR_ID0 0x54
+#define IT66121_VENDOR_ID1 0x49
+#define IT66121_DEVICE_ID0 0x12
+#define IT66121_DEVICE_ID1 0x06
+#define IT66121_REVISION_MASK GENMASK(7, 4)
+#define IT66121_DEVICE_ID1_MASK GENMASK(3, 0)
+
+#define IT66121_MASTER_SEL_REG 0x10
+#define IT66121_MASTER_SEL_HOST BIT(0)
+
+#define IT66121_AFE_DRV_REG 0x61
+#define IT66121_AFE_DRV_RST BIT(4)
+#define IT66121_AFE_DRV_PWD BIT(5)
+
+#define IT66121_INPUT_MODE_REG 0x70
+#define IT66121_INPUT_MODE_RGB (0 << 6)
+#define IT66121_INPUT_MODE_YUV422 BIT(6)
+#define IT66121_INPUT_MODE_YUV444 (2 << 6)
+#define IT66121_INPUT_MODE_CCIR656 BIT(4)
+#define IT66121_INPUT_MODE_SYNCEMB BIT(3)
+#define IT66121_INPUT_MODE_DDR BIT(2)
+
+#define IT66121_INPUT_CSC_REG 0x72
+#define IT66121_INPUT_CSC_ENDITHER BIT(7)
+#define IT66121_INPUT_CSC_ENUDFILTER BIT(6)
+#define IT66121_INPUT_CSC_DNFREE_GO BIT(5)
+#define IT66121_INPUT_CSC_RGB_TO_YUV 0x02
+#define IT66121_INPUT_CSC_YUV_TO_RGB 0x03
+#define IT66121_INPUT_CSC_NO_CONV 0x00
+
+#define IT66121_AFE_XP_REG 0x62
+#define IT66121_AFE_XP_GAINBIT BIT(7)
+#define IT66121_AFE_XP_PWDPLL BIT(6)
+#define IT66121_AFE_XP_ENI BIT(5)
+#define IT66121_AFE_XP_ENO BIT(4)
+#define IT66121_AFE_XP_RESETB BIT(3)
+#define IT66121_AFE_XP_PWDI BIT(2)
+
+#define IT66121_AFE_IP_REG 0x64
+#define IT66121_AFE_IP_GAINBIT BIT(7)
+#define IT66121_AFE_IP_PWDPLL BIT(6)
+#define IT66121_AFE_IP_CKSEL_05 (0 << 4)
+#define IT66121_AFE_IP_CKSEL_1 BIT(4)
+#define IT66121_AFE_IP_CKSEL_2 (2 << 4)
+#define IT66121_AFE_IP_CKSEL_2OR4 (3 << 4)
+#define IT66121_AFE_IP_ER0 BIT(3)
+#define IT66121_AFE_IP_RESETB BIT(2)
+#define IT66121_AFE_IP_ENC BIT(1)
+#define IT66121_AFE_IP_EC1 BIT(0)
+
+#define IT66121_AFE_XP_EC1_REG 0x68
+#define IT66121_AFE_XP_EC1_LOWCLK BIT(4)
+
+#define IT66121_SW_RST_REG 0x04
+#define IT66121_SW_RST_REF BIT(5)
+#define IT66121_SW_RST_AREF BIT(4)
+#define IT66121_SW_RST_VID BIT(3)
+#define IT66121_SW_RST_AUD BIT(2)
+#define IT66121_SW_RST_HDCP BIT(0)
+
+#define IT66121_DDC_COMMAND_REG 0x15
+#define IT66121_DDC_COMMAND_BURST_READ 0x0
+#define IT66121_DDC_COMMAND_EDID_READ 0x3
+#define IT66121_DDC_COMMAND_FIFO_CLR 0x9
+#define IT66121_DDC_COMMAND_SCL_PULSE 0xA
+#define IT66121_DDC_COMMAND_ABORT 0xF
+
+#define IT66121_HDCP_REG 0x20
+#define IT66121_HDCP_CPDESIRED BIT(0)
+#define IT66121_HDCP_EN1P1FEAT BIT(1)
+
+#define IT66121_INT_STATUS1_REG 0x06
+#define IT66121_INT_STATUS1_AUD_OVF BIT(7)
+#define IT66121_INT_STATUS1_DDC_NOACK BIT(5)
+#define IT66121_INT_STATUS1_DDC_FIFOERR BIT(4)
+#define IT66121_INT_STATUS1_DDC_BUSHANG BIT(2)
+#define IT66121_INT_STATUS1_RX_SENS_STATUS BIT(1)
+#define IT66121_INT_STATUS1_HPD_STATUS BIT(0)
+
+#define IT66121_DDC_HEADER_REG 0x11
+#define IT66121_DDC_HEADER_HDCP 0x74
+#define IT66121_DDC_HEADER_EDID 0xA0
+
+#define IT66121_DDC_OFFSET_REG 0x12
+#define IT66121_DDC_BYTE_REG 0x13
+#define IT66121_DDC_SEGMENT_REG 0x14
+#define IT66121_DDC_RD_FIFO_REG 0x17
+
+#define IT66121_CLK_BANK_REG 0x0F
+#define IT66121_CLK_BANK_PWROFF_RCLK BIT(6)
+#define IT66121_CLK_BANK_PWROFF_ACLK BIT(5)
+#define IT66121_CLK_BANK_PWROFF_TXCLK BIT(4)
+#define IT66121_CLK_BANK_PWROFF_CRCLK BIT(3)
+#define IT66121_CLK_BANK_0 0
+#define IT66121_CLK_BANK_1 1
+
+#define IT66121_INT_REG 0x05
+#define IT66121_INT_ACTIVE_HIGH BIT(7)
+#define IT66121_INT_OPEN_DRAIN BIT(6)
+#define IT66121_INT_TX_CLK_OFF BIT(0)
+
+#define IT66121_INT_MASK1_REG 0x09
+#define IT66121_INT_MASK1_AUD_OVF BIT(7)
+#define IT66121_INT_MASK1_DDC_NOACK BIT(5)
+#define IT66121_INT_MASK1_DDC_FIFOERR BIT(4)
+#define IT66121_INT_MASK1_DDC_BUSHANG BIT(2)
+#define IT66121_INT_MASK1_RX_SENS BIT(1)
+#define IT66121_INT_MASK1_HPD BIT(0)
+
+#define IT66121_INT_CLR1_REG 0x0C
+#define IT66121_INT_CLR1_PKTACP BIT(7)
+#define IT66121_INT_CLR1_PKTNULL BIT(6)
+#define IT66121_INT_CLR1_PKTGEN BIT(5)
+#define IT66121_INT_CLR1_KSVLISTCHK BIT(4)
+#define IT66121_INT_CLR1_AUTHDONE BIT(3)
+#define IT66121_INT_CLR1_AUTHFAIL BIT(2)
+#define IT66121_INT_CLR1_RX_SENS BIT(1)
+#define IT66121_INT_CLR1_HPD BIT(0)
+
+#define IT66121_AV_MUTE_REG 0xC1
+#define IT66121_AV_MUTE_ON BIT(0)
+#define IT66121_AV_MUTE_BLUESCR BIT(1)
+
+#define IT66121_PKT_CTS_CTRL_REG 0xC5
+#define IT66121_PKT_CTS_CTRL_SEL BIT(1)
+
+#define IT66121_PKT_GEN_CTRL_REG 0xC6
+#define IT66121_PKT_GEN_CTRL_ON BIT(0)
+#define IT66121_PKT_GEN_CTRL_RPT BIT(1)
+
+#define IT66121_AVIINFO_DB1_REG 0x158
+#define IT66121_AVIINFO_DB2_REG 0x159
+#define IT66121_AVIINFO_DB3_REG 0x15A
+#define IT66121_AVIINFO_DB4_REG 0x15B
+#define IT66121_AVIINFO_DB5_REG 0x15C
+#define IT66121_AVIINFO_CSUM_REG 0x15D
+#define IT66121_AVIINFO_DB6_REG 0x15E
+#define IT66121_AVIINFO_DB7_REG 0x15F
+#define IT66121_AVIINFO_DB8_REG 0x160
+#define IT66121_AVIINFO_DB9_REG 0x161
+#define IT66121_AVIINFO_DB10_REG 0x162
+#define IT66121_AVIINFO_DB11_REG 0x163
+#define IT66121_AVIINFO_DB12_REG 0x164
+#define IT66121_AVIINFO_DB13_REG 0x165
+
+#define IT66121_AVI_INFO_PKT_REG 0xCD
+#define IT66121_AVI_INFO_PKT_ON BIT(0)
+#define IT66121_AVI_INFO_PKT_RPT BIT(1)
+
+#define IT66121_HDMI_MODE_REG 0xC0
+#define IT66121_HDMI_MODE_HDMI BIT(0)
+
+#define IT66121_SYS_STATUS_REG 0x0E
+#define IT66121_SYS_STATUS_ACTIVE_IRQ BIT(7)
+#define IT66121_SYS_STATUS_HPDETECT BIT(6)
+#define IT66121_SYS_STATUS_SENDECTECT BIT(5)
+#define IT66121_SYS_STATUS_VID_STABLE BIT(4)
+#define IT66121_SYS_STATUS_AUD_CTS_CLR BIT(1)
+#define IT66121_SYS_STATUS_CLEAR_IRQ BIT(0)
+
+#define IT66121_DDC_STATUS_REG 0x16
+#define IT66121_DDC_STATUS_TX_DONE BIT(7)
+#define IT66121_DDC_STATUS_ACTIVE BIT(6)
+#define IT66121_DDC_STATUS_NOACK BIT(5)
+#define IT66121_DDC_STATUS_WAIT_BUS BIT(4)
+#define IT66121_DDC_STATUS_ARBI_LOSE BIT(3)
+#define IT66121_DDC_STATUS_FIFO_FULL BIT(2)
+#define IT66121_DDC_STATUS_FIFO_EMPTY BIT(1)
+#define IT66121_DDC_STATUS_FIFO_VALID BIT(0)
+
+#define IT66121_EDID_SLEEP_US 20000
+#define IT66121_EDID_TIMEOUT_US 200000
+#define IT66121_EDID_FIFO_SIZE 32
+
+#define IT66121_CLK_CTRL0_REG 0x58
+#define IT66121_CLK_CTRL0_AUTO_OVER_SAMPLING BIT(4)
+#define IT66121_CLK_CTRL0_EXT_MCLK_MASK GENMASK(3, 2)
+#define IT66121_CLK_CTRL0_EXT_MCLK_128FS (0 << 2)
+#define IT66121_CLK_CTRL0_EXT_MCLK_256FS BIT(2)
+#define IT66121_CLK_CTRL0_EXT_MCLK_512FS (2 << 2)
+#define IT66121_CLK_CTRL0_EXT_MCLK_1024FS (3 << 2)
+#define IT66121_CLK_CTRL0_AUTO_IPCLK BIT(0)
+#define IT66121_CLK_STATUS1_REG 0x5E
+#define IT66121_CLK_STATUS2_REG 0x5F
+
+#define IT66121_AUD_CTRL0_REG 0xE0
+#define IT66121_AUD_SWL (3 << 6)
+#define IT66121_AUD_16BIT (0 << 6)
+#define IT66121_AUD_18BIT BIT(6)
+#define IT66121_AUD_20BIT (2 << 6)
+#define IT66121_AUD_24BIT (3 << 6)
+#define IT66121_AUD_SPDIFTC BIT(5)
+#define IT66121_AUD_SPDIF BIT(4)
+#define IT66121_AUD_I2S (0 << 4)
+#define IT66121_AUD_EN_I2S3 BIT(3)
+#define IT66121_AUD_EN_I2S2 BIT(2)
+#define IT66121_AUD_EN_I2S1 BIT(1)
+#define IT66121_AUD_EN_I2S0 BIT(0)
+#define IT66121_AUD_CTRL0_AUD_SEL BIT(4)
+
+#define IT66121_AUD_CTRL1_REG 0xE1
+#define IT66121_AUD_FIFOMAP_REG 0xE2
+#define IT66121_AUD_CTRL3_REG 0xE3
+#define IT66121_AUD_SRCVALID_FLAT_REG 0xE4
+#define IT66121_AUD_FLAT_SRC0 BIT(4)
+#define IT66121_AUD_FLAT_SRC1 BIT(5)
+#define IT66121_AUD_FLAT_SRC2 BIT(6)
+#define IT66121_AUD_FLAT_SRC3 BIT(7)
+#define IT66121_AUD_HDAUDIO_REG 0xE5
+
+#define IT66121_AUD_PKT_CTS0_REG 0x130
+#define IT66121_AUD_PKT_CTS1_REG 0x131
+#define IT66121_AUD_PKT_CTS2_REG 0x132
+#define IT66121_AUD_PKT_N0_REG 0x133
+#define IT66121_AUD_PKT_N1_REG 0x134
+#define IT66121_AUD_PKT_N2_REG 0x135
+
+#define IT66121_AUD_CHST_MODE_REG 0x191
+#define IT66121_AUD_CHST_CAT_REG 0x192
+#define IT66121_AUD_CHST_SRCNUM_REG 0x193
+#define IT66121_AUD_CHST_CHTNUM_REG 0x194
+#define IT66121_AUD_CHST_CA_FS_REG 0x198
+#define IT66121_AUD_CHST_OFS_WL_REG 0x199
+
+#define IT66121_AUD_PKT_CTS_CNT0_REG 0x1A0
+#define IT66121_AUD_PKT_CTS_CNT1_REG 0x1A1
+#define IT66121_AUD_PKT_CTS_CNT2_REG 0x1A2
+
+#define IT66121_AUD_FS_22P05K 0x4
+#define IT66121_AUD_FS_44P1K 0x0
+#define IT66121_AUD_FS_88P2K 0x8
+#define IT66121_AUD_FS_176P4K 0xC
+#define IT66121_AUD_FS_24K 0x6
+#define IT66121_AUD_FS_48K 0x2
+#define IT66121_AUD_FS_96K 0xA
+#define IT66121_AUD_FS_192K 0xE
+#define IT66121_AUD_FS_768K 0x9
+#define IT66121_AUD_FS_32K 0x3
+#define IT66121_AUD_FS_OTHER 0x1
+
+#define IT66121_AUD_SWL_21BIT 0xD
+#define IT66121_AUD_SWL_24BIT 0xB
+#define IT66121_AUD_SWL_23BIT 0x9
+#define IT66121_AUD_SWL_22BIT 0x5
+#define IT66121_AUD_SWL_20BIT 0x3
+#define IT66121_AUD_SWL_17BIT 0xC
+#define IT66121_AUD_SWL_19BIT 0x8
+#define IT66121_AUD_SWL_18BIT 0x4
+#define IT66121_AUD_SWL_16BIT 0x2
+#define IT66121_AUD_SWL_NOT_INDICATED 0x0
+
+#define IT66121_VENDOR_ID0 0x54
+#define IT66121_VENDOR_ID1 0x49
+#define IT66121_DEVICE_ID0 0x12
+#define IT66121_DEVICE_ID1 0x06
+#define IT66121_DEVICE_MASK 0x0F
+#define IT66121_AFE_CLK_HIGH 80000 /* Khz */
+
+struct it66121_ctx {
+ struct regmap *regmap;
+ struct drm_bridge bridge;
+ struct drm_bridge *next_bridge;
+ struct drm_connector *connector;
+ struct device *dev;
+ struct gpio_desc *gpio_reset;
+ struct i2c_client *client;
+ struct regulator_bulk_data supplies[3];
+ u32 bus_width;
+ struct mutex lock; /* Protects fields below and device registers */
+ struct hdmi_avi_infoframe hdmi_avi_infoframe;
+ struct {
+ struct platform_device *pdev;
+ u8 ch_enable;
+ u8 fs;
+ u8 swl;
+ bool auto_cts;
+ } audio;
+};
+
+static const struct regmap_range_cfg it66121_regmap_banks[] = {
+ {
+ .name = "it66121",
+ .range_min = 0x00,
+ .range_max = 0x1FF,
+ .selector_reg = IT66121_CLK_BANK_REG,
+ .selector_mask = 0x1,
+ .selector_shift = 0,
+ .window_start = 0x00,
+ .window_len = 0x100,
+ },
+};
+
+static const struct regmap_config it66121_regmap_config = {
+ .val_bits = 8,
+ .reg_bits = 8,
+ .max_register = 0x1FF,
+ .ranges = it66121_regmap_banks,
+ .num_ranges = ARRAY_SIZE(it66121_regmap_banks),
+};
+
+static void it66121_hw_reset(struct it66121_ctx *ctx)
+{
+ gpiod_set_value(ctx->gpio_reset, 1);
+ msleep(20);
+ gpiod_set_value(ctx->gpio_reset, 0);
+}
+
+static inline int ite66121_power_on(struct it66121_ctx *ctx)
+{
+ return regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+}
+
+static inline int ite66121_power_off(struct it66121_ctx *ctx)
+{
+ return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+}
+
+static inline int it66121_preamble_ddc(struct it66121_ctx *ctx)
+{
+ return regmap_write(ctx->regmap, IT66121_MASTER_SEL_REG, IT66121_MASTER_SEL_HOST);
+}
+
+static inline int it66121_fire_afe(struct it66121_ctx *ctx)
+{
+ return regmap_write(ctx->regmap, IT66121_AFE_DRV_REG, 0);
+}
+
+/* TOFIX: Handle YCbCr Input & Output */
+static int it66121_configure_input(struct it66121_ctx *ctx)
+{
+ int ret;
+ u8 mode = IT66121_INPUT_MODE_RGB;
+
+ if (ctx->bus_width == 12)
+ mode |= IT66121_INPUT_MODE_DDR;
+
+ ret = regmap_write(ctx->regmap, IT66121_INPUT_MODE_REG, mode);
+ if (ret)
+ return ret;
+
+ return regmap_write(ctx->regmap, IT66121_INPUT_CSC_REG, IT66121_INPUT_CSC_NO_CONV);
+}
+
+/**
+ * it66121_configure_afe() - Configure the analog front end
+ * @ctx: it66121_ctx object
+ * @mode: mode to configure
+ *
+ * RETURNS:
+ * zero if success, a negative error code otherwise.
+ */
+static int it66121_configure_afe(struct it66121_ctx *ctx,
+ const struct drm_display_mode *mode)
+{
+ int ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_AFE_DRV_REG,
+ IT66121_AFE_DRV_RST);
+ if (ret)
+ return ret;
+
+ if (mode->clock > IT66121_AFE_CLK_HIGH) {
+ ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG,
+ IT66121_AFE_XP_GAINBIT |
+ IT66121_AFE_XP_ENO,
+ IT66121_AFE_XP_GAINBIT);
+ if (ret)
+ return ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG,
+ IT66121_AFE_IP_GAINBIT |
+ IT66121_AFE_IP_ER0 |
+ IT66121_AFE_IP_EC1,
+ IT66121_AFE_IP_GAINBIT);
+ if (ret)
+ return ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_EC1_REG,
+ IT66121_AFE_XP_EC1_LOWCLK, 0x80);
+ if (ret)
+ return ret;
+ } else {
+ ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG,
+ IT66121_AFE_XP_GAINBIT |
+ IT66121_AFE_XP_ENO,
+ IT66121_AFE_XP_ENO);
+ if (ret)
+ return ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG,
+ IT66121_AFE_IP_GAINBIT |
+ IT66121_AFE_IP_ER0 |
+ IT66121_AFE_IP_EC1, IT66121_AFE_IP_ER0 |
+ IT66121_AFE_IP_EC1);
+ if (ret)
+ return ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_EC1_REG,
+ IT66121_AFE_XP_EC1_LOWCLK,
+ IT66121_AFE_XP_EC1_LOWCLK);
+ if (ret)
+ return ret;
+ }
+
+ /* Clear reset flags */
+ ret = regmap_write_bits(ctx->regmap, IT66121_SW_RST_REG,
+ IT66121_SW_RST_REF | IT66121_SW_RST_VID, 0);
+ if (ret)
+ return ret;
+
+ return it66121_fire_afe(ctx);
+}
+
+static inline int it66121_wait_ddc_ready(struct it66121_ctx *ctx)
+{
+ int ret, val;
+ u32 busy = IT66121_DDC_STATUS_NOACK | IT66121_DDC_STATUS_WAIT_BUS |
+ IT66121_DDC_STATUS_ARBI_LOSE;
+
+ ret = regmap_read_poll_timeout(ctx->regmap, IT66121_DDC_STATUS_REG, val, true,
+ IT66121_EDID_SLEEP_US, IT66121_EDID_TIMEOUT_US);
+ if (ret)
+ return ret;
+
+ if (val & busy)
+ return -EAGAIN;
+
+ return 0;
+}
+
+static int it66121_clear_ddc_fifo(struct it66121_ctx *ctx)
+{
+ int ret;
+
+ ret = it66121_preamble_ddc(ctx);
+ if (ret)
+ return ret;
+
+ return regmap_write(ctx->regmap, IT66121_DDC_COMMAND_REG,
+ IT66121_DDC_COMMAND_FIFO_CLR);
+}
+
+static int it66121_abort_ddc_ops(struct it66121_ctx *ctx)
+{
+ int ret;
+ unsigned int swreset, cpdesire;
+
+ ret = regmap_read(ctx->regmap, IT66121_SW_RST_REG, &swreset);
+ if (ret)
+ return ret;
+
+ ret = regmap_read(ctx->regmap, IT66121_HDCP_REG, &cpdesire);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_HDCP_REG,
+ cpdesire & (~IT66121_HDCP_CPDESIRED & 0xFF));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_SW_RST_REG,
+ (swreset | IT66121_SW_RST_HDCP));
+ if (ret)
+ return ret;
+
+ ret = it66121_preamble_ddc(ctx);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_DDC_COMMAND_REG,
+ IT66121_DDC_COMMAND_ABORT);
+ if (ret)
+ return ret;
+
+ return it66121_wait_ddc_ready(ctx);
+}
+
+static int it66121_get_edid_block(void *context, u8 *buf,
+ unsigned int block, size_t len)
+{
+ struct it66121_ctx *ctx = context;
+ unsigned int val;
+ int remain = len;
+ int offset = 0;
+ int ret, cnt;
+
+ offset = (block % 2) * len;
+ block = block / 2;
+
+ ret = regmap_read(ctx->regmap, IT66121_INT_STATUS1_REG, &val);
+ if (ret)
+ return ret;
+
+ if (val & IT66121_INT_STATUS1_DDC_BUSHANG) {
+ ret = it66121_abort_ddc_ops(ctx);
+ if (ret)
+ return ret;
+ }
+
+ ret = it66121_clear_ddc_fifo(ctx);
+ if (ret)
+ return ret;
+
+ while (remain > 0) {
+ cnt = (remain > IT66121_EDID_FIFO_SIZE) ?
+ IT66121_EDID_FIFO_SIZE : remain;
+ ret = it66121_preamble_ddc(ctx);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_DDC_COMMAND_REG,
+ IT66121_DDC_COMMAND_FIFO_CLR);
+ if (ret)
+ return ret;
+
+ ret = it66121_wait_ddc_ready(ctx);
+ if (ret)
+ return ret;
+
+ ret = regmap_read(ctx->regmap, IT66121_INT_STATUS1_REG, &val);
+ if (ret)
+ return ret;
+
+ if (val & IT66121_INT_STATUS1_DDC_BUSHANG) {
+ ret = it66121_abort_ddc_ops(ctx);
+ if (ret)
+ return ret;
+ }
+
+ ret = it66121_preamble_ddc(ctx);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_DDC_HEADER_REG,
+ IT66121_DDC_HEADER_EDID);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_DDC_OFFSET_REG, offset);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_DDC_BYTE_REG, cnt);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_DDC_SEGMENT_REG, block);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_DDC_COMMAND_REG,
+ IT66121_DDC_COMMAND_EDID_READ);
+ if (ret)
+ return ret;
+
+ offset += cnt;
+ remain -= cnt;
+
+ /* Per programming manual, sleep here before emptying the FIFO */
+ msleep(20);
+
+ ret = it66121_wait_ddc_ready(ctx);
+ if (ret)
+ return ret;
+
+ do {
+ ret = regmap_read(ctx->regmap, IT66121_DDC_RD_FIFO_REG, &val);
+ if (ret)
+ return ret;
+ *(buf++) = val;
+ cnt--;
+ } while (cnt > 0);
+ }
+
+ return 0;
+}
+
+static bool it66121_is_hpd_detect(struct it66121_ctx *ctx)
+{
+ int val;
+
+ if (regmap_read(ctx->regmap, IT66121_SYS_STATUS_REG, &val))
+ return false;
+
+ return val & IT66121_SYS_STATUS_HPDETECT;
+}
+
+static int it66121_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
+ int ret;
+
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
+ return -EINVAL;
+
+ ret = drm_bridge_attach(bridge->encoder, ctx->next_bridge, bridge, flags);
+ if (ret)
+ return ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_CLK_BANK_REG,
+ IT66121_CLK_BANK_PWROFF_RCLK, 0);
+ if (ret)
+ return ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_INT_REG,
+ IT66121_INT_TX_CLK_OFF, 0);
+ if (ret)
+ return ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_AFE_DRV_REG,
+ IT66121_AFE_DRV_PWD, 0);
+ if (ret)
+ return ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG,
+ IT66121_AFE_XP_PWDI | IT66121_AFE_XP_PWDPLL, 0);
+ if (ret)
+ return ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG,
+ IT66121_AFE_IP_PWDPLL, 0);
+ if (ret)
+ return ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_AFE_DRV_REG,
+ IT66121_AFE_DRV_RST, 0);
+ if (ret)
+ return ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_AFE_XP_REG,
+ IT66121_AFE_XP_RESETB, IT66121_AFE_XP_RESETB);
+ if (ret)
+ return ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_AFE_IP_REG,
+ IT66121_AFE_IP_RESETB, IT66121_AFE_IP_RESETB);
+ if (ret)
+ return ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_SW_RST_REG,
+ IT66121_SW_RST_REF,
+ IT66121_SW_RST_REF);
+ if (ret)
+ return ret;
+
+ /* Per programming manual, sleep here for bridge to settle */
+ msleep(50);
+
+ /* Start interrupts */
+ return regmap_write_bits(ctx->regmap, IT66121_INT_MASK1_REG,
+ IT66121_INT_MASK1_DDC_NOACK |
+ IT66121_INT_MASK1_DDC_FIFOERR |
+ IT66121_INT_MASK1_DDC_BUSHANG, 0);
+}
+
+static int it66121_set_mute(struct it66121_ctx *ctx, bool mute)
+{
+ int ret;
+ unsigned int val = 0;
+
+ if (mute)
+ val = IT66121_AV_MUTE_ON;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_AV_MUTE_REG, IT66121_AV_MUTE_ON, val);
+ if (ret)
+ return ret;
+
+ return regmap_write(ctx->regmap, IT66121_PKT_GEN_CTRL_REG,
+ IT66121_PKT_GEN_CTRL_ON | IT66121_PKT_GEN_CTRL_RPT);
+}
+
+#define MAX_OUTPUT_SEL_FORMATS 1
+
+static u32 *it66121_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ unsigned int *num_output_fmts)
+{
+ u32 *output_fmts;
+
+ output_fmts = kcalloc(MAX_OUTPUT_SEL_FORMATS, sizeof(*output_fmts),
+ GFP_KERNEL);
+ if (!output_fmts)
+ return NULL;
+
+ /* TOFIX handle more than MEDIA_BUS_FMT_RGB888_1X24 as output format */
+ output_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
+ *num_output_fmts = 1;
+
+ return output_fmts;
+}
+
+#define MAX_INPUT_SEL_FORMATS 1
+
+static u32 *it66121_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
+ u32 *input_fmts;
+
+ *num_input_fmts = 0;
+
+ input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
+ GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ if (ctx->bus_width == 12)
+ /* IT66121FN Datasheet specifies Little-Endian ordering */
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_2X12_LE;
+ else
+ /* TOFIX support more input bus formats in 24bit width */
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
+ *num_input_fmts = 1;
+
+ return input_fmts;
+}
+
+static void it66121_bridge_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state)
+{
+ struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
+ struct drm_atomic_state *state = bridge_state->base.state;
+
+ ctx->connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
+
+ it66121_set_mute(ctx, false);
+}
+
+static void it66121_bridge_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state)
+{
+ struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
+
+ it66121_set_mute(ctx, true);
+
+ ctx->connector = NULL;
+}
+
+static
+void it66121_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ int ret, i;
+ u8 buf[HDMI_INFOFRAME_SIZE(AVI)];
+ struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
+ const u16 aviinfo_reg[HDMI_AVI_INFOFRAME_SIZE] = {
+ IT66121_AVIINFO_DB1_REG,
+ IT66121_AVIINFO_DB2_REG,
+ IT66121_AVIINFO_DB3_REG,
+ IT66121_AVIINFO_DB4_REG,
+ IT66121_AVIINFO_DB5_REG,
+ IT66121_AVIINFO_DB6_REG,
+ IT66121_AVIINFO_DB7_REG,
+ IT66121_AVIINFO_DB8_REG,
+ IT66121_AVIINFO_DB9_REG,
+ IT66121_AVIINFO_DB10_REG,
+ IT66121_AVIINFO_DB11_REG,
+ IT66121_AVIINFO_DB12_REG,
+ IT66121_AVIINFO_DB13_REG
+ };
+
+ mutex_lock(&ctx->lock);
+
+ hdmi_avi_infoframe_init(&ctx->hdmi_avi_infoframe);
+
+ ret = drm_hdmi_avi_infoframe_from_display_mode(&ctx->hdmi_avi_infoframe, ctx->connector,
+ adjusted_mode);
+ if (ret) {
+ DRM_ERROR("Failed to setup AVI infoframe: %d\n", ret);
+ goto unlock;
+ }
+
+ ret = hdmi_avi_infoframe_pack(&ctx->hdmi_avi_infoframe, buf, sizeof(buf));
+ if (ret < 0) {
+ DRM_ERROR("Failed to pack infoframe: %d\n", ret);
+ goto unlock;
+ }
+
+ /* Write new AVI infoframe packet */
+ for (i = 0; i < HDMI_AVI_INFOFRAME_SIZE; i++) {
+ if (regmap_write(ctx->regmap, aviinfo_reg[i], buf[i + HDMI_INFOFRAME_HEADER_SIZE]))
+ goto unlock;
+ }
+ if (regmap_write(ctx->regmap, IT66121_AVIINFO_CSUM_REG, buf[3]))
+ goto unlock;
+
+ /* Enable AVI infoframe */
+ if (regmap_write(ctx->regmap, IT66121_AVI_INFO_PKT_REG,
+ IT66121_AVI_INFO_PKT_ON | IT66121_AVI_INFO_PKT_RPT))
+ goto unlock;
+
+ /* Set TX mode to HDMI */
+ if (regmap_write(ctx->regmap, IT66121_HDMI_MODE_REG, IT66121_HDMI_MODE_HDMI))
+ goto unlock;
+
+ if (regmap_write_bits(ctx->regmap, IT66121_CLK_BANK_REG,
+ IT66121_CLK_BANK_PWROFF_TXCLK, IT66121_CLK_BANK_PWROFF_TXCLK))
+ goto unlock;
+
+ if (it66121_configure_input(ctx))
+ goto unlock;
+
+ if (it66121_configure_afe(ctx, adjusted_mode))
+ goto unlock;
+
+ regmap_write_bits(ctx->regmap, IT66121_CLK_BANK_REG, IT66121_CLK_BANK_PWROFF_TXCLK, 0);
+
+unlock:
+ mutex_unlock(&ctx->lock);
+}
+
+static enum drm_mode_status it66121_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
+ unsigned long max_clock;
+
+ max_clock = (ctx->bus_width == 12) ? 74250 : 148500;
+
+ if (mode->clock > max_clock)
+ return MODE_CLOCK_HIGH;
+
+ if (mode->clock < 25000)
+ return MODE_CLOCK_LOW;
+
+ return MODE_OK;
+}
+
+static enum drm_connector_status it66121_bridge_detect(struct drm_bridge *bridge)
+{
+ struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
+
+ return it66121_is_hpd_detect(ctx) ? connector_status_connected
+ : connector_status_disconnected;
+}
+
+static void it66121_bridge_hpd_enable(struct drm_bridge *bridge)
+{
+ struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
+ int ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_INT_MASK1_REG, IT66121_INT_MASK1_HPD, 0);
+ if (ret)
+ dev_err(ctx->dev, "failed to enable HPD IRQ\n");
+}
+
+static void it66121_bridge_hpd_disable(struct drm_bridge *bridge)
+{
+ struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
+ int ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_INT_MASK1_REG,
+ IT66121_INT_MASK1_HPD, IT66121_INT_MASK1_HPD);
+ if (ret)
+ dev_err(ctx->dev, "failed to disable HPD IRQ\n");
+}
+
+static struct edid *it66121_bridge_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
+ struct edid *edid;
+
+ mutex_lock(&ctx->lock);
+ edid = drm_do_get_edid(connector, it66121_get_edid_block, ctx);
+ mutex_unlock(&ctx->lock);
+
+ return edid;
+}
+
+static const struct drm_bridge_funcs it66121_bridge_funcs = {
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .attach = it66121_bridge_attach,
+ .atomic_get_output_bus_fmts = it66121_bridge_atomic_get_output_bus_fmts,
+ .atomic_get_input_bus_fmts = it66121_bridge_atomic_get_input_bus_fmts,
+ .atomic_enable = it66121_bridge_enable,
+ .atomic_disable = it66121_bridge_disable,
+ .mode_set = it66121_bridge_mode_set,
+ .mode_valid = it66121_bridge_mode_valid,
+ .detect = it66121_bridge_detect,
+ .get_edid = it66121_bridge_get_edid,
+ .hpd_enable = it66121_bridge_hpd_enable,
+ .hpd_disable = it66121_bridge_hpd_disable,
+};
+
+static irqreturn_t it66121_irq_threaded_handler(int irq, void *dev_id)
+{
+ int ret;
+ unsigned int val;
+ struct it66121_ctx *ctx = dev_id;
+ struct device *dev = ctx->dev;
+ enum drm_connector_status status;
+ bool event = false;
+
+ mutex_lock(&ctx->lock);
+
+ ret = regmap_read(ctx->regmap, IT66121_SYS_STATUS_REG, &val);
+ if (ret)
+ goto unlock;
+
+ if (!(val & IT66121_SYS_STATUS_ACTIVE_IRQ))
+ goto unlock;
+
+ ret = regmap_read(ctx->regmap, IT66121_INT_STATUS1_REG, &val);
+ if (ret) {
+ dev_err(dev, "Cannot read STATUS1_REG %d\n", ret);
+ } else {
+ if (val & IT66121_INT_STATUS1_DDC_FIFOERR)
+ it66121_clear_ddc_fifo(ctx);
+ if (val & (IT66121_INT_STATUS1_DDC_BUSHANG |
+ IT66121_INT_STATUS1_DDC_NOACK))
+ it66121_abort_ddc_ops(ctx);
+ if (val & IT66121_INT_STATUS1_HPD_STATUS) {
+ regmap_write_bits(ctx->regmap, IT66121_INT_CLR1_REG,
+ IT66121_INT_CLR1_HPD, IT66121_INT_CLR1_HPD);
+
+ status = it66121_is_hpd_detect(ctx) ? connector_status_connected
+ : connector_status_disconnected;
+
+ event = true;
+ }
+ }
+
+ regmap_write_bits(ctx->regmap, IT66121_SYS_STATUS_REG,
+ IT66121_SYS_STATUS_CLEAR_IRQ,
+ IT66121_SYS_STATUS_CLEAR_IRQ);
+
+unlock:
+ mutex_unlock(&ctx->lock);
+
+ if (event)
+ drm_bridge_hpd_notify(&ctx->bridge, status);
+
+ return IRQ_HANDLED;
+}
+
+static int it661221_set_chstat(struct it66121_ctx *ctx, u8 iec60958_chstat[])
+{
+ int ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_AUD_CHST_MODE_REG, iec60958_chstat[0] & 0x7C);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_AUD_CHST_CAT_REG, iec60958_chstat[1]);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_AUD_CHST_SRCNUM_REG, iec60958_chstat[2] & 0x0F);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_AUD_CHST_CHTNUM_REG,
+ (iec60958_chstat[2] >> 4) & 0x0F);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_AUD_CHST_CA_FS_REG, iec60958_chstat[3]);
+ if (ret)
+ return ret;
+
+ return regmap_write(ctx->regmap, IT66121_AUD_CHST_OFS_WL_REG, iec60958_chstat[4]);
+}
+
+static int it661221_set_lpcm_audio(struct it66121_ctx *ctx, u8 audio_src_num, u8 audio_swl)
+{
+ int ret;
+ unsigned int audio_enable = 0;
+ unsigned int audio_format = 0;
+
+ switch (audio_swl) {
+ case 16:
+ audio_enable |= IT66121_AUD_16BIT;
+ break;
+ case 18:
+ audio_enable |= IT66121_AUD_18BIT;
+ break;
+ case 20:
+ audio_enable |= IT66121_AUD_20BIT;
+ break;
+ case 24:
+ default:
+ audio_enable |= IT66121_AUD_24BIT;
+ break;
+ }
+
+ audio_format |= 0x40;
+ switch (audio_src_num) {
+ case 4:
+ audio_enable |= IT66121_AUD_EN_I2S3 | IT66121_AUD_EN_I2S2 |
+ IT66121_AUD_EN_I2S1 | IT66121_AUD_EN_I2S0;
+ break;
+ case 3:
+ audio_enable |= IT66121_AUD_EN_I2S2 | IT66121_AUD_EN_I2S1 |
+ IT66121_AUD_EN_I2S0;
+ break;
+ case 2:
+ audio_enable |= IT66121_AUD_EN_I2S1 | IT66121_AUD_EN_I2S0;
+ break;
+ case 1:
+ default:
+ audio_format &= ~0x40;
+ audio_enable |= IT66121_AUD_EN_I2S0;
+ break;
+ }
+
+ audio_format |= 0x01;
+ ctx->audio.ch_enable = audio_enable;
+
+ ret = regmap_write(ctx->regmap, IT66121_AUD_CTRL0_REG, audio_enable & 0xF0);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_AUD_CTRL1_REG, audio_format);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_AUD_FIFOMAP_REG, 0xE4);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_AUD_CTRL3_REG, 0x00);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_AUD_SRCVALID_FLAT_REG, 0x00);
+ if (ret)
+ return ret;
+
+ return regmap_write(ctx->regmap, IT66121_AUD_HDAUDIO_REG, 0x00);
+}
+
+static int it661221_set_ncts(struct it66121_ctx *ctx, u8 fs)
+{
+ int ret;
+ unsigned int n;
+
+ switch (fs) {
+ case IT66121_AUD_FS_32K:
+ n = 4096;
+ break;
+ case IT66121_AUD_FS_44P1K:
+ n = 6272;
+ break;
+ case IT66121_AUD_FS_48K:
+ n = 6144;
+ break;
+ case IT66121_AUD_FS_88P2K:
+ n = 12544;
+ break;
+ case IT66121_AUD_FS_96K:
+ n = 12288;
+ break;
+ case IT66121_AUD_FS_176P4K:
+ n = 25088;
+ break;
+ case IT66121_AUD_FS_192K:
+ n = 24576;
+ break;
+ case IT66121_AUD_FS_768K:
+ n = 24576;
+ break;
+ default:
+ n = 6144;
+ break;
+ }
+
+ ret = regmap_write(ctx->regmap, IT66121_AUD_PKT_N0_REG, (u8)((n) & 0xFF));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_AUD_PKT_N1_REG, (u8)((n >> 8) & 0xFF));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_AUD_PKT_N2_REG, (u8)((n >> 16) & 0xF));
+ if (ret)
+ return ret;
+
+ if (ctx->audio.auto_cts) {
+ u8 loop_cnt = 255;
+ u8 cts_stable_cnt = 0;
+ unsigned int sum_cts = 0;
+ unsigned int cts = 0;
+ unsigned int last_cts = 0;
+ unsigned int diff;
+ unsigned int val;
+
+ while (loop_cnt--) {
+ msleep(30);
+ regmap_read(ctx->regmap, IT66121_AUD_PKT_CTS_CNT2_REG, &val);
+ cts = val << 12;
+ regmap_read(ctx->regmap, IT66121_AUD_PKT_CTS_CNT1_REG, &val);
+ cts |= val << 4;
+ regmap_read(ctx->regmap, IT66121_AUD_PKT_CTS_CNT0_REG, &val);
+ cts |= val >> 4;
+ if (cts == 0) {
+ continue;
+ } else {
+ if (last_cts > cts)
+ diff = last_cts - cts;
+ else
+ diff = cts - last_cts;
+ last_cts = cts;
+ if (diff < 5) {
+ cts_stable_cnt++;
+ sum_cts += cts;
+ } else {
+ cts_stable_cnt = 0;
+ sum_cts = 0;
+ continue;
+ }
+
+ if (cts_stable_cnt >= 32) {
+ last_cts = (sum_cts >> 5);
+ break;
+ }
+ }
+ }
+
+ regmap_write(ctx->regmap, IT66121_AUD_PKT_CTS0_REG, (u8)((last_cts) & 0xFF));
+ regmap_write(ctx->regmap, IT66121_AUD_PKT_CTS1_REG, (u8)((last_cts >> 8) & 0xFF));
+ regmap_write(ctx->regmap, IT66121_AUD_PKT_CTS2_REG, (u8)((last_cts >> 16) & 0x0F));
+ }
+
+ ret = regmap_write(ctx->regmap, 0xF8, 0xC3);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, 0xF8, 0xA5);
+ if (ret)
+ return ret;
+
+ if (ctx->audio.auto_cts) {
+ ret = regmap_write_bits(ctx->regmap, IT66121_PKT_CTS_CTRL_REG,
+ IT66121_PKT_CTS_CTRL_SEL,
+ 1);
+ } else {
+ ret = regmap_write_bits(ctx->regmap, IT66121_PKT_CTS_CTRL_REG,
+ IT66121_PKT_CTS_CTRL_SEL,
+ 0);
+ }
+
+ if (ret)
+ return ret;
+
+ return regmap_write(ctx->regmap, 0xF8, 0xFF);
+}
+
+static int it661221_audio_output_enable(struct it66121_ctx *ctx, bool enable)
+{
+ int ret;
+
+ if (enable) {
+ ret = regmap_write_bits(ctx->regmap, IT66121_SW_RST_REG,
+ IT66121_SW_RST_AUD | IT66121_SW_RST_AREF,
+ 0);
+ if (ret)
+ return ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_AUD_CTRL0_REG,
+ IT66121_AUD_EN_I2S3 | IT66121_AUD_EN_I2S2 |
+ IT66121_AUD_EN_I2S1 | IT66121_AUD_EN_I2S0,
+ ctx->audio.ch_enable);
+ } else {
+ ret = regmap_write_bits(ctx->regmap, IT66121_AUD_CTRL0_REG,
+ IT66121_AUD_EN_I2S3 | IT66121_AUD_EN_I2S2 |
+ IT66121_AUD_EN_I2S1 | IT66121_AUD_EN_I2S0,
+ ctx->audio.ch_enable & 0xF0);
+ if (ret)
+ return ret;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_SW_RST_REG,
+ IT66121_SW_RST_AUD | IT66121_SW_RST_AREF,
+ IT66121_SW_RST_AUD | IT66121_SW_RST_AREF);
+ }
+
+ return ret;
+}
+
+static int it661221_audio_ch_enable(struct it66121_ctx *ctx, bool enable)
+{
+ int ret;
+
+ if (enable) {
+ ret = regmap_write(ctx->regmap, IT66121_AUD_SRCVALID_FLAT_REG, 0);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(ctx->regmap, IT66121_AUD_CTRL0_REG, ctx->audio.ch_enable);
+ } else {
+ ret = regmap_write(ctx->regmap, IT66121_AUD_CTRL0_REG, ctx->audio.ch_enable & 0xF0);
+ }
+
+ return ret;
+}
+
+static int it66121_audio_hw_params(struct device *dev, void *data,
+ struct hdmi_codec_daifmt *daifmt,
+ struct hdmi_codec_params *params)
+{
+ u8 fs;
+ u8 swl;
+ int ret;
+ struct it66121_ctx *ctx = dev_get_drvdata(dev);
+ static u8 iec60958_chstat[5];
+ unsigned int channels = params->channels;
+ unsigned int sample_rate = params->sample_rate;
+ unsigned int sample_width = params->sample_width;
+
+ mutex_lock(&ctx->lock);
+ dev_dbg(dev, "%s: %u, %u, %u, %u\n", __func__,
+ daifmt->fmt, sample_rate, sample_width, channels);
+
+ switch (daifmt->fmt) {
+ case HDMI_I2S:
+ dev_dbg(dev, "Using HDMI I2S\n");
+ break;
+ default:
+ dev_err(dev, "Invalid or unsupported DAI format %d\n", daifmt->fmt);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ // Set audio clock recovery (N/CTS)
+ ret = regmap_write(ctx->regmap, IT66121_CLK_CTRL0_REG,
+ IT66121_CLK_CTRL0_AUTO_OVER_SAMPLING |
+ IT66121_CLK_CTRL0_EXT_MCLK_256FS |
+ IT66121_CLK_CTRL0_AUTO_IPCLK);
+ if (ret)
+ goto out;
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_AUD_CTRL0_REG,
+ IT66121_AUD_CTRL0_AUD_SEL, 0); // remove spdif selection
+ if (ret)
+ goto out;
+
+ switch (sample_rate) {
+ case 44100L:
+ fs = IT66121_AUD_FS_44P1K;
+ break;
+ case 88200L:
+ fs = IT66121_AUD_FS_88P2K;
+ break;
+ case 176400L:
+ fs = IT66121_AUD_FS_176P4K;
+ break;
+ case 32000L:
+ fs = IT66121_AUD_FS_32K;
+ break;
+ case 48000L:
+ fs = IT66121_AUD_FS_48K;
+ break;
+ case 96000L:
+ fs = IT66121_AUD_FS_96K;
+ break;
+ case 192000L:
+ fs = IT66121_AUD_FS_192K;
+ break;
+ case 768000L:
+ fs = IT66121_AUD_FS_768K;
+ break;
+ default:
+ fs = IT66121_AUD_FS_48K;
+ break;
+ }
+
+ ctx->audio.fs = fs;
+ ret = it661221_set_ncts(ctx, fs);
+ if (ret) {
+ dev_err(dev, "Failed to set N/CTS: %d\n", ret);
+ goto out;
+ }
+
+ // Set audio format register (except audio channel enable)
+ ret = it661221_set_lpcm_audio(ctx, (channels + 1) / 2, sample_width);
+ if (ret) {
+ dev_err(dev, "Failed to set LPCM audio: %d\n", ret);
+ goto out;
+ }
+
+ // Set audio channel status
+ iec60958_chstat[0] = 0;
+ if ((channels + 1) / 2 == 1)
+ iec60958_chstat[0] |= 0x1;
+ iec60958_chstat[0] &= ~(1 << 1);
+ iec60958_chstat[1] = 0;
+ iec60958_chstat[2] = (channels + 1) / 2;
+ iec60958_chstat[2] |= (channels << 4) & 0xF0;
+ iec60958_chstat[3] = fs;
+
+ switch (sample_width) {
+ case 21L:
+ swl = IT66121_AUD_SWL_21BIT;
+ break;
+ case 24L:
+ swl = IT66121_AUD_SWL_24BIT;
+ break;
+ case 23L:
+ swl = IT66121_AUD_SWL_23BIT;
+ break;
+ case 22L:
+ swl = IT66121_AUD_SWL_22BIT;
+ break;
+ case 20L:
+ swl = IT66121_AUD_SWL_20BIT;
+ break;
+ case 17L:
+ swl = IT66121_AUD_SWL_17BIT;
+ break;
+ case 19L:
+ swl = IT66121_AUD_SWL_19BIT;
+ break;
+ case 18L:
+ swl = IT66121_AUD_SWL_18BIT;
+ break;
+ case 16L:
+ swl = IT66121_AUD_SWL_16BIT;
+ break;
+ default:
+ swl = IT66121_AUD_SWL_NOT_INDICATED;
+ break;
+ }
+
+ iec60958_chstat[4] = (((~fs) << 4) & 0xF0) | swl;
+ ret = it661221_set_chstat(ctx, iec60958_chstat);
+ if (ret) {
+ dev_err(dev, "Failed to set channel status: %d\n", ret);
+ goto out;
+ }
+
+ // Enable audio channel enable while input clock stable (if SPDIF).
+ ret = it661221_audio_ch_enable(ctx, true);
+ if (ret) {
+ dev_err(dev, "Failed to enable audio channel: %d\n", ret);
+ goto out;
+ }
+
+ ret = regmap_write_bits(ctx->regmap, IT66121_INT_MASK1_REG,
+ IT66121_INT_MASK1_AUD_OVF,
+ 0);
+ if (ret)
+ goto out;
+
+ dev_dbg(dev, "HDMI audio enabled.\n");
+out:
+ mutex_unlock(&ctx->lock);
+
+ return ret;
+}
+
+static int it66121_audio_startup(struct device *dev, void *data)
+{
+ int ret;
+ struct it66121_ctx *ctx = dev_get_drvdata(dev);
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ mutex_lock(&ctx->lock);
+ ret = it661221_audio_output_enable(ctx, true);
+ if (ret)
+ dev_err(dev, "Failed to enable audio output: %d\n", ret);
+
+ mutex_unlock(&ctx->lock);
+
+ return ret;
+}
+
+static void it66121_audio_shutdown(struct device *dev, void *data)
+{
+ int ret;
+ struct it66121_ctx *ctx = dev_get_drvdata(dev);
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ mutex_lock(&ctx->lock);
+ ret = it661221_audio_output_enable(ctx, false);
+ if (ret)
+ dev_err(dev, "Failed to disable audio output: %d\n", ret);
+
+ mutex_unlock(&ctx->lock);
+}
+
+static int it66121_audio_mute(struct device *dev, void *data,
+ bool enable, int direction)
+{
+ int ret;
+ struct it66121_ctx *ctx = dev_get_drvdata(dev);
+
+ dev_dbg(dev, "%s: enable=%s, direction=%d\n",
+ __func__, enable ? "true" : "false", direction);
+
+ mutex_lock(&ctx->lock);
+
+ if (enable) {
+ ret = regmap_write_bits(ctx->regmap, IT66121_AUD_SRCVALID_FLAT_REG,
+ IT66121_AUD_FLAT_SRC0 | IT66121_AUD_FLAT_SRC1 |
+ IT66121_AUD_FLAT_SRC2 | IT66121_AUD_FLAT_SRC3,
+ IT66121_AUD_FLAT_SRC0 | IT66121_AUD_FLAT_SRC1 |
+ IT66121_AUD_FLAT_SRC2 | IT66121_AUD_FLAT_SRC3);
+ } else {
+ ret = regmap_write_bits(ctx->regmap, IT66121_AUD_SRCVALID_FLAT_REG,
+ IT66121_AUD_FLAT_SRC0 | IT66121_AUD_FLAT_SRC1 |
+ IT66121_AUD_FLAT_SRC2 | IT66121_AUD_FLAT_SRC3,
+ 0);
+ }
+
+ mutex_unlock(&ctx->lock);
+
+ return ret;
+}
+
+static int it66121_audio_get_eld(struct device *dev, void *data,
+ u8 *buf, size_t len)
+{
+ struct it66121_ctx *ctx = dev_get_drvdata(dev);
+
+ mutex_lock(&ctx->lock);
+ if (!ctx->connector) {
+ /* Pass en empty ELD if connector not available */
+ dev_dbg(dev, "No connector present, passing empty EDID data");
+ memset(buf, 0, len);
+ } else {
+ memcpy(buf, ctx->connector->eld,
+ min(sizeof(ctx->connector->eld), len));
+ }
+ mutex_unlock(&ctx->lock);
+
+ return 0;
+}
+
+static const struct hdmi_codec_ops it66121_audio_codec_ops = {
+ .hw_params = it66121_audio_hw_params,
+ .audio_startup = it66121_audio_startup,
+ .audio_shutdown = it66121_audio_shutdown,
+ .mute_stream = it66121_audio_mute,
+ .get_eld = it66121_audio_get_eld,
+ .no_capture_mute = 1,
+};
+
+static int it66121_audio_codec_init(struct it66121_ctx *ctx, struct device *dev)
+{
+ struct hdmi_codec_pdata codec_data = {
+ .ops = &it66121_audio_codec_ops,
+ .i2s = 1, /* Only i2s support for now */
+ .spdif = 0,
+ .max_i2s_channels = 8,
+ };
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) {
+ dev_info(dev, "No \"#sound-dai-cells\", no audio\n");
+ return 0;
+ }
+
+ ctx->audio.pdev = platform_device_register_data(dev,
+ HDMI_CODEC_DRV_NAME,
+ PLATFORM_DEVID_AUTO,
+ &codec_data,
+ sizeof(codec_data));
+
+ if (IS_ERR(ctx->audio.pdev)) {
+ dev_err(dev, "Failed to initialize HDMI audio codec: %d\n",
+ PTR_ERR_OR_ZERO(ctx->audio.pdev));
+ }
+
+ return PTR_ERR_OR_ZERO(ctx->audio.pdev);
+}
+
+static int it66121_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ u32 revision_id, vendor_ids[2] = { 0 }, device_ids[2] = { 0 };
+ struct device_node *ep;
+ int ret;
+ struct it66121_ctx *ctx;
+ struct device *dev = &client->dev;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(dev, "I2C check functionality failed.\n");
+ return -ENXIO;
+ }
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
+ if (!ep)
+ return -EINVAL;
+
+ ctx->dev = dev;
+ ctx->client = client;
+
+ of_property_read_u32(ep, "bus-width", &ctx->bus_width);
+ of_node_put(ep);
+
+ if (ctx->bus_width != 12 && ctx->bus_width != 24)
+ return -EINVAL;
+
+ ep = of_graph_get_remote_node(dev->of_node, 1, -1);
+ if (!ep) {
+ dev_err(ctx->dev, "The endpoint is unconnected\n");
+ return -EINVAL;
+ }
+
+ if (!of_device_is_available(ep)) {
+ of_node_put(ep);
+ dev_err(ctx->dev, "The remote device is disabled\n");
+ return -ENODEV;
+ }
+
+ ctx->next_bridge = of_drm_find_bridge(ep);
+ of_node_put(ep);
+ if (!ctx->next_bridge) {
+ dev_dbg(ctx->dev, "Next bridge not found, deferring probe\n");
+ return -EPROBE_DEFER;
+ }
+
+ i2c_set_clientdata(client, ctx);
+ mutex_init(&ctx->lock);
+
+ ctx->supplies[0].supply = "vcn33";
+ ctx->supplies[1].supply = "vcn18";
+ ctx->supplies[2].supply = "vrf12";
+ ret = devm_regulator_bulk_get(ctx->dev, 3, ctx->supplies);
+ if (ret) {
+ dev_err(ctx->dev, "regulator_bulk failed\n");
+ return ret;
+ }
+
+ ret = ite66121_power_on(ctx);
+ if (ret)
+ return ret;
+
+ it66121_hw_reset(ctx);
+
+ ctx->regmap = devm_regmap_init_i2c(client, &it66121_regmap_config);
+ if (IS_ERR(ctx->regmap)) {
+ ite66121_power_off(ctx);
+ return PTR_ERR(ctx->regmap);
+ }
+
+ regmap_read(ctx->regmap, IT66121_VENDOR_ID0_REG, &vendor_ids[0]);
+ regmap_read(ctx->regmap, IT66121_VENDOR_ID1_REG, &vendor_ids[1]);
+ regmap_read(ctx->regmap, IT66121_DEVICE_ID0_REG, &device_ids[0]);
+ regmap_read(ctx->regmap, IT66121_DEVICE_ID1_REG, &device_ids[1]);
+
+ /* Revision is shared with DEVICE_ID1 */
+ revision_id = FIELD_GET(IT66121_REVISION_MASK, device_ids[1]);
+ device_ids[1] &= IT66121_DEVICE_ID1_MASK;
+
+ if (vendor_ids[0] != IT66121_VENDOR_ID0 || vendor_ids[1] != IT66121_VENDOR_ID1 ||
+ device_ids[0] != IT66121_DEVICE_ID0 || device_ids[1] != IT66121_DEVICE_ID1) {
+ ite66121_power_off(ctx);
+ return -ENODEV;
+ }
+
+ ctx->bridge.funcs = &it66121_bridge_funcs;
+ ctx->bridge.of_node = dev->of_node;
+ ctx->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
+ ctx->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
+
+ ret = devm_request_threaded_irq(dev, client->irq, NULL, it66121_irq_threaded_handler,
+ IRQF_ONESHOT, dev_name(dev), ctx);
+ if (ret < 0) {
+ dev_err(dev, "Failed to request irq %d:%d\n", client->irq, ret);
+ ite66121_power_off(ctx);
+ return ret;
+ }
+
+ it66121_audio_codec_init(ctx, dev);
+
+ drm_bridge_add(&ctx->bridge);
+
+ dev_info(ctx->dev, "IT66121 revision %d probed\n", revision_id);
+
+ return 0;
+}
+
+static void it66121_remove(struct i2c_client *client)
+{
+ struct it66121_ctx *ctx = i2c_get_clientdata(client);
+
+ ite66121_power_off(ctx);
+ drm_bridge_remove(&ctx->bridge);
+ mutex_destroy(&ctx->lock);
+}
+
+static const struct of_device_id it66121_dt_match[] = {
+ { .compatible = "ite,it66121" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, it66121_dt_match);
+
+static const struct i2c_device_id it66121_id[] = {
+ { "it66121", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, it66121_id);
+
+static struct i2c_driver it66121_driver = {
+ .driver = {
+ .name = "it66121",
+ .of_match_table = it66121_dt_match,
+ },
+ .probe = it66121_probe,
+ .remove = it66121_remove,
+ .id_table = it66121_id,
+};
+
+module_i2c_driver(it66121_driver);
+
+MODULE_AUTHOR("Phong LE");
+MODULE_DESCRIPTION("IT66121 HDMI transmitter driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c
new file mode 100644
index 000000000..ac76c2363
--- /dev/null
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -0,0 +1,783 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/media-bus-format.h>
+#include <linux/regmap.h>
+
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+
+#include <video/videomode.h>
+
+#define I2C_MAIN 0
+#define I2C_ADDR_MAIN 0x48
+
+#define I2C_CEC_DSI 1
+#define I2C_ADDR_CEC_DSI 0x49
+
+#define I2C_MAX_IDX 2
+
+struct lt8912 {
+ struct device *dev;
+ struct drm_bridge bridge;
+ struct drm_connector connector;
+
+ struct i2c_client *i2c_client[I2C_MAX_IDX];
+ struct regmap *regmap[I2C_MAX_IDX];
+
+ struct device_node *host_node;
+ struct drm_bridge *hdmi_port;
+
+ struct mipi_dsi_device *dsi;
+
+ struct gpio_desc *gp_reset;
+
+ struct videomode mode;
+
+ u8 data_lanes;
+ bool is_power_on;
+};
+
+static int lt8912_write_init_config(struct lt8912 *lt)
+{
+ const struct reg_sequence seq[] = {
+ /* Digital clock en*/
+ {0x08, 0xff},
+ {0x09, 0xff},
+ {0x0a, 0xff},
+ {0x0b, 0x7c},
+ {0x0c, 0xff},
+ {0x42, 0x04},
+
+ /*Tx Analog*/
+ {0x31, 0xb1},
+ {0x32, 0xb1},
+ {0x33, 0x0e},
+ {0x37, 0x00},
+ {0x38, 0x22},
+ {0x60, 0x82},
+
+ /*Cbus Analog*/
+ {0x39, 0x45},
+ {0x3a, 0x00},
+ {0x3b, 0x00},
+
+ /*HDMI Pll Analog*/
+ {0x44, 0x31},
+ {0x55, 0x44},
+ {0x57, 0x01},
+ {0x5a, 0x02},
+
+ /*MIPI Analog*/
+ {0x3e, 0xd6},
+ {0x3f, 0xd4},
+ {0x41, 0x3c},
+ {0xB2, 0x00},
+ };
+
+ return regmap_multi_reg_write(lt->regmap[I2C_MAIN], seq, ARRAY_SIZE(seq));
+}
+
+static int lt8912_write_mipi_basic_config(struct lt8912 *lt)
+{
+ const struct reg_sequence seq[] = {
+ {0x12, 0x04},
+ {0x14, 0x00},
+ {0x15, 0x00},
+ {0x1a, 0x03},
+ {0x1b, 0x03},
+ };
+
+ return regmap_multi_reg_write(lt->regmap[I2C_CEC_DSI], seq, ARRAY_SIZE(seq));
+};
+
+static int lt8912_write_dds_config(struct lt8912 *lt)
+{
+ const struct reg_sequence seq[] = {
+ {0x4e, 0xff},
+ {0x4f, 0x56},
+ {0x50, 0x69},
+ {0x51, 0x80},
+ {0x1f, 0x5e},
+ {0x20, 0x01},
+ {0x21, 0x2c},
+ {0x22, 0x01},
+ {0x23, 0xfa},
+ {0x24, 0x00},
+ {0x25, 0xc8},
+ {0x26, 0x00},
+ {0x27, 0x5e},
+ {0x28, 0x01},
+ {0x29, 0x2c},
+ {0x2a, 0x01},
+ {0x2b, 0xfa},
+ {0x2c, 0x00},
+ {0x2d, 0xc8},
+ {0x2e, 0x00},
+ {0x42, 0x64},
+ {0x43, 0x00},
+ {0x44, 0x04},
+ {0x45, 0x00},
+ {0x46, 0x59},
+ {0x47, 0x00},
+ {0x48, 0xf2},
+ {0x49, 0x06},
+ {0x4a, 0x00},
+ {0x4b, 0x72},
+ {0x4c, 0x45},
+ {0x4d, 0x00},
+ {0x52, 0x08},
+ {0x53, 0x00},
+ {0x54, 0xb2},
+ {0x55, 0x00},
+ {0x56, 0xe4},
+ {0x57, 0x0d},
+ {0x58, 0x00},
+ {0x59, 0xe4},
+ {0x5a, 0x8a},
+ {0x5b, 0x00},
+ {0x5c, 0x34},
+ {0x1e, 0x4f},
+ {0x51, 0x00},
+ };
+
+ return regmap_multi_reg_write(lt->regmap[I2C_CEC_DSI], seq, ARRAY_SIZE(seq));
+}
+
+static int lt8912_write_rxlogicres_config(struct lt8912 *lt)
+{
+ int ret;
+
+ ret = regmap_write(lt->regmap[I2C_MAIN], 0x03, 0x7f);
+ usleep_range(10000, 20000);
+ ret |= regmap_write(lt->regmap[I2C_MAIN], 0x03, 0xff);
+
+ return ret;
+};
+
+/* enable LVDS output with some hardcoded configuration, not required for the HDMI output */
+static int lt8912_write_lvds_config(struct lt8912 *lt)
+{
+ const struct reg_sequence seq[] = {
+ // lvds power up
+ {0x44, 0x30},
+ {0x51, 0x05},
+
+ // core pll bypass
+ {0x50, 0x24}, // cp=50uA
+ {0x51, 0x2d}, // Pix_clk as reference, second order passive LPF PLL
+ {0x52, 0x04}, // loopdiv=0, use second-order PLL
+ {0x69, 0x0e}, // CP_PRESET_DIV_RATIO
+ {0x69, 0x8e},
+ {0x6a, 0x00},
+ {0x6c, 0xb8}, // RGD_CP_SOFT_K_EN,RGD_CP_SOFT_K[13:8]
+ {0x6b, 0x51},
+
+ {0x04, 0xfb}, // core pll reset
+ {0x04, 0xff},
+
+ // scaler bypass
+ {0x7f, 0x00}, // disable scaler
+ {0xa8, 0x13}, // 0x13: JEIDA, 0x33: VESA
+
+ {0x02, 0xf7}, // lvds pll reset
+ {0x02, 0xff},
+ {0x03, 0xcf},
+ {0x03, 0xff},
+ };
+
+ return regmap_multi_reg_write(lt->regmap[I2C_MAIN], seq, ARRAY_SIZE(seq));
+};
+
+static inline struct lt8912 *bridge_to_lt8912(struct drm_bridge *b)
+{
+ return container_of(b, struct lt8912, bridge);
+}
+
+static inline struct lt8912 *connector_to_lt8912(struct drm_connector *c)
+{
+ return container_of(c, struct lt8912, connector);
+}
+
+static const struct regmap_config lt8912_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0xff,
+};
+
+static int lt8912_init_i2c(struct lt8912 *lt, struct i2c_client *client)
+{
+ unsigned int i;
+ /*
+ * At this time we only initialize 2 chips, but the lt8912 provides
+ * a third interface for the audio over HDMI configuration.
+ */
+ struct i2c_board_info info[] = {
+ { I2C_BOARD_INFO("lt8912p0", I2C_ADDR_MAIN), },
+ { I2C_BOARD_INFO("lt8912p1", I2C_ADDR_CEC_DSI), },
+ };
+
+ if (!lt)
+ return -ENODEV;
+
+ for (i = 0; i < ARRAY_SIZE(info); i++) {
+ if (i > 0) {
+ lt->i2c_client[i] = i2c_new_dummy_device(client->adapter,
+ info[i].addr);
+ if (IS_ERR(lt->i2c_client[i]))
+ return PTR_ERR(lt->i2c_client[i]);
+ }
+
+ lt->regmap[i] = devm_regmap_init_i2c(lt->i2c_client[i],
+ &lt8912_regmap_config);
+ if (IS_ERR(lt->regmap[i]))
+ return PTR_ERR(lt->regmap[i]);
+ }
+ return 0;
+}
+
+static int lt8912_free_i2c(struct lt8912 *lt)
+{
+ unsigned int i;
+
+ for (i = 1; i < I2C_MAX_IDX; i++)
+ i2c_unregister_device(lt->i2c_client[i]);
+
+ return 0;
+}
+
+static int lt8912_hard_power_on(struct lt8912 *lt)
+{
+ gpiod_set_value_cansleep(lt->gp_reset, 0);
+ msleep(20);
+
+ return 0;
+}
+
+static void lt8912_hard_power_off(struct lt8912 *lt)
+{
+ gpiod_set_value_cansleep(lt->gp_reset, 1);
+ msleep(20);
+ lt->is_power_on = false;
+}
+
+static int lt8912_video_setup(struct lt8912 *lt)
+{
+ u32 hactive, h_total, hpw, hfp, hbp;
+ u32 vactive, v_total, vpw, vfp, vbp;
+ u8 settle = 0x08;
+ int ret, hsync_activehigh, vsync_activehigh;
+
+ if (!lt)
+ return -EINVAL;
+
+ hactive = lt->mode.hactive;
+ hfp = lt->mode.hfront_porch;
+ hpw = lt->mode.hsync_len;
+ hbp = lt->mode.hback_porch;
+ h_total = hactive + hfp + hpw + hbp;
+ hsync_activehigh = lt->mode.flags & DISPLAY_FLAGS_HSYNC_HIGH;
+
+ vactive = lt->mode.vactive;
+ vfp = lt->mode.vfront_porch;
+ vpw = lt->mode.vsync_len;
+ vbp = lt->mode.vback_porch;
+ v_total = vactive + vfp + vpw + vbp;
+ vsync_activehigh = lt->mode.flags & DISPLAY_FLAGS_VSYNC_HIGH;
+
+ if (vactive <= 600)
+ settle = 0x04;
+ else if (vactive == 1080)
+ settle = 0x0a;
+
+ ret = regmap_write(lt->regmap[I2C_CEC_DSI], 0x10, 0x01);
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x11, settle);
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x18, hpw);
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x19, vpw);
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x1c, hactive & 0xff);
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x1d, hactive >> 8);
+
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x2f, 0x0c);
+
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x34, h_total & 0xff);
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x35, h_total >> 8);
+
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x36, v_total & 0xff);
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x37, v_total >> 8);
+
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x38, vbp & 0xff);
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x39, vbp >> 8);
+
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3a, vfp & 0xff);
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3b, vfp >> 8);
+
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3c, hbp & 0xff);
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3d, hbp >> 8);
+
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3e, hfp & 0xff);
+ ret |= regmap_write(lt->regmap[I2C_CEC_DSI], 0x3f, hfp >> 8);
+
+ ret |= regmap_update_bits(lt->regmap[I2C_MAIN], 0xab, BIT(0),
+ vsync_activehigh ? BIT(0) : 0);
+ ret |= regmap_update_bits(lt->regmap[I2C_MAIN], 0xab, BIT(1),
+ hsync_activehigh ? BIT(1) : 0);
+ ret |= regmap_update_bits(lt->regmap[I2C_MAIN], 0xb2, BIT(0),
+ lt->connector.display_info.is_hdmi ? BIT(0) : 0);
+
+ return ret;
+}
+
+static int lt8912_soft_power_on(struct lt8912 *lt)
+{
+ if (!lt->is_power_on) {
+ u32 lanes = lt->data_lanes;
+
+ lt8912_write_init_config(lt);
+ regmap_write(lt->regmap[I2C_CEC_DSI], 0x13, lanes & 3);
+
+ lt8912_write_mipi_basic_config(lt);
+
+ lt->is_power_on = true;
+ }
+
+ return 0;
+}
+
+static int lt8912_video_on(struct lt8912 *lt)
+{
+ int ret;
+
+ ret = lt8912_video_setup(lt);
+ if (ret < 0)
+ goto end;
+
+ ret = lt8912_write_dds_config(lt);
+ if (ret < 0)
+ goto end;
+
+ ret = lt8912_write_rxlogicres_config(lt);
+ if (ret < 0)
+ goto end;
+
+ ret = lt8912_write_lvds_config(lt);
+ if (ret < 0)
+ goto end;
+
+end:
+ return ret;
+}
+
+static enum drm_connector_status lt8912_check_cable_status(struct lt8912 *lt)
+{
+ int ret;
+ unsigned int reg_val;
+
+ ret = regmap_read(lt->regmap[I2C_MAIN], 0xC1, &reg_val);
+ if (ret)
+ return connector_status_unknown;
+
+ if (reg_val & BIT(7))
+ return connector_status_connected;
+
+ return connector_status_disconnected;
+}
+
+static enum drm_connector_status
+lt8912_connector_detect(struct drm_connector *connector, bool force)
+{
+ struct lt8912 *lt = connector_to_lt8912(connector);
+
+ if (lt->hdmi_port->ops & DRM_BRIDGE_OP_DETECT)
+ return drm_bridge_detect(lt->hdmi_port);
+
+ return lt8912_check_cable_status(lt);
+}
+
+static const struct drm_connector_funcs lt8912_connector_funcs = {
+ .detect = lt8912_connector_detect,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static enum drm_mode_status
+lt8912_connector_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ if (mode->clock > 150000)
+ return MODE_CLOCK_HIGH;
+
+ if (mode->hdisplay > 1920)
+ return MODE_BAD_HVALUE;
+
+ if (mode->vdisplay > 1080)
+ return MODE_BAD_VVALUE;
+
+ return MODE_OK;
+}
+
+static int lt8912_connector_get_modes(struct drm_connector *connector)
+{
+ struct edid *edid;
+ int ret = -1;
+ int num = 0;
+ struct lt8912 *lt = connector_to_lt8912(connector);
+ u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+
+ edid = drm_bridge_get_edid(lt->hdmi_port, connector);
+ if (edid) {
+ drm_connector_update_edid_property(connector, edid);
+ num = drm_add_edid_modes(connector, edid);
+ } else {
+ return ret;
+ }
+
+ ret = drm_display_info_set_bus_formats(&connector->display_info,
+ &bus_format, 1);
+ if (ret)
+ num = ret;
+
+ kfree(edid);
+ return num;
+}
+
+static const struct drm_connector_helper_funcs lt8912_connector_helper_funcs = {
+ .get_modes = lt8912_connector_get_modes,
+ .mode_valid = lt8912_connector_mode_valid,
+};
+
+static void lt8912_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adj)
+{
+ struct lt8912 *lt = bridge_to_lt8912(bridge);
+
+ drm_display_mode_to_videomode(adj, &lt->mode);
+}
+
+static void lt8912_bridge_enable(struct drm_bridge *bridge)
+{
+ struct lt8912 *lt = bridge_to_lt8912(bridge);
+
+ lt8912_video_on(lt);
+}
+
+static int lt8912_attach_dsi(struct lt8912 *lt)
+{
+ struct device *dev = lt->dev;
+ struct mipi_dsi_host *host;
+ struct mipi_dsi_device *dsi;
+ int ret = -1;
+ const struct mipi_dsi_device_info info = { .type = "lt8912",
+ .channel = 0,
+ .node = NULL,
+ };
+
+ host = of_find_mipi_dsi_host_by_node(lt->host_node);
+ if (!host) {
+ dev_err(dev, "failed to find dsi host\n");
+ return -EPROBE_DEFER;
+ }
+
+ dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
+ if (IS_ERR(dsi)) {
+ ret = PTR_ERR(dsi);
+ dev_err(dev, "failed to create dsi device (%d)\n", ret);
+ return ret;
+ }
+
+ lt->dsi = dsi;
+
+ dsi->lanes = lt->data_lanes;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
+ MIPI_DSI_MODE_LPM |
+ MIPI_DSI_MODE_NO_EOT_PACKET;
+
+ ret = devm_mipi_dsi_attach(dev, dsi);
+ if (ret < 0) {
+ dev_err(dev, "failed to attach dsi to host\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static void lt8912_bridge_hpd_cb(void *data, enum drm_connector_status status)
+{
+ struct lt8912 *lt = data;
+
+ if (lt->bridge.dev)
+ drm_helper_hpd_irq_event(lt->bridge.dev);
+}
+
+static int lt8912_bridge_connector_init(struct drm_bridge *bridge)
+{
+ int ret;
+ struct lt8912 *lt = bridge_to_lt8912(bridge);
+ struct drm_connector *connector = &lt->connector;
+
+ if (lt->hdmi_port->ops & DRM_BRIDGE_OP_HPD) {
+ drm_bridge_hpd_enable(lt->hdmi_port, lt8912_bridge_hpd_cb, lt);
+ connector->polled = DRM_CONNECTOR_POLL_HPD;
+ } else {
+ connector->polled = DRM_CONNECTOR_POLL_CONNECT |
+ DRM_CONNECTOR_POLL_DISCONNECT;
+ }
+
+ ret = drm_connector_init(bridge->dev, connector,
+ &lt8912_connector_funcs,
+ lt->hdmi_port->type);
+ if (ret)
+ goto exit;
+
+ drm_connector_helper_add(connector, &lt8912_connector_helper_funcs);
+
+ connector->dpms = DRM_MODE_DPMS_OFF;
+ drm_connector_attach_encoder(connector, bridge->encoder);
+
+exit:
+ return ret;
+}
+
+static int lt8912_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct lt8912 *lt = bridge_to_lt8912(bridge);
+ int ret;
+
+ ret = drm_bridge_attach(bridge->encoder, lt->hdmi_port, bridge,
+ DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+ if (ret < 0) {
+ dev_err(lt->dev, "Failed to attach next bridge (%d)\n", ret);
+ return ret;
+ }
+
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+ ret = lt8912_bridge_connector_init(bridge);
+ if (ret) {
+ dev_err(lt->dev, "Failed to init bridge ! (%d)\n", ret);
+ return ret;
+ }
+ }
+
+ ret = lt8912_hard_power_on(lt);
+ if (ret)
+ return ret;
+
+ ret = lt8912_soft_power_on(lt);
+ if (ret)
+ goto error;
+
+ return 0;
+
+error:
+ lt8912_hard_power_off(lt);
+ return ret;
+}
+
+static void lt8912_bridge_detach(struct drm_bridge *bridge)
+{
+ struct lt8912 *lt = bridge_to_lt8912(bridge);
+
+ lt8912_hard_power_off(lt);
+
+ if (lt->connector.dev && lt->hdmi_port->ops & DRM_BRIDGE_OP_HPD)
+ drm_bridge_hpd_disable(lt->hdmi_port);
+}
+
+static enum drm_connector_status
+lt8912_bridge_detect(struct drm_bridge *bridge)
+{
+ struct lt8912 *lt = bridge_to_lt8912(bridge);
+
+ if (lt->hdmi_port->ops & DRM_BRIDGE_OP_DETECT)
+ return drm_bridge_detect(lt->hdmi_port);
+
+ return lt8912_check_cable_status(lt);
+}
+
+static struct edid *lt8912_bridge_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct lt8912 *lt = bridge_to_lt8912(bridge);
+
+ /*
+ * edid must be read through the ddc bus but it must be
+ * given to the hdmi connector node.
+ */
+ if (lt->hdmi_port->ops & DRM_BRIDGE_OP_EDID)
+ return drm_bridge_get_edid(lt->hdmi_port, connector);
+
+ dev_warn(lt->dev, "The connected bridge does not supports DRM_BRIDGE_OP_EDID\n");
+ return NULL;
+}
+
+static const struct drm_bridge_funcs lt8912_bridge_funcs = {
+ .attach = lt8912_bridge_attach,
+ .detach = lt8912_bridge_detach,
+ .mode_set = lt8912_bridge_mode_set,
+ .enable = lt8912_bridge_enable,
+ .detect = lt8912_bridge_detect,
+ .get_edid = lt8912_bridge_get_edid,
+};
+
+static int lt8912_parse_dt(struct lt8912 *lt)
+{
+ struct gpio_desc *gp_reset;
+ struct device *dev = lt->dev;
+ int ret;
+ int data_lanes;
+ struct device_node *port_node;
+
+ gp_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(gp_reset)) {
+ ret = PTR_ERR(gp_reset);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "Failed to get reset gpio: %d\n", ret);
+ return ret;
+ }
+ lt->gp_reset = gp_reset;
+
+ data_lanes = drm_of_get_data_lanes_count_ep(dev->of_node, 0, -1, 1, 4);
+ if (data_lanes < 0) {
+ dev_err(lt->dev, "%s: Bad data-lanes property\n", __func__);
+ return data_lanes;
+ }
+
+ lt->data_lanes = data_lanes;
+
+ lt->host_node = of_graph_get_remote_node(dev->of_node, 0, -1);
+ if (!lt->host_node) {
+ dev_err(lt->dev, "%s: Failed to get remote port\n", __func__);
+ return -ENODEV;
+ }
+
+ port_node = of_graph_get_remote_node(dev->of_node, 1, -1);
+ if (!port_node) {
+ dev_err(lt->dev, "%s: Failed to get connector port\n", __func__);
+ ret = -ENODEV;
+ goto err_free_host_node;
+ }
+
+ lt->hdmi_port = of_drm_find_bridge(port_node);
+ if (!lt->hdmi_port) {
+ ret = -EPROBE_DEFER;
+ dev_err_probe(lt->dev, ret, "%s: Failed to get hdmi port\n", __func__);
+ goto err_free_host_node;
+ }
+
+ if (!of_device_is_compatible(port_node, "hdmi-connector")) {
+ dev_err(lt->dev, "%s: Failed to get hdmi port\n", __func__);
+ ret = -EINVAL;
+ goto err_free_host_node;
+ }
+
+ of_node_put(port_node);
+ return 0;
+
+err_free_host_node:
+ of_node_put(port_node);
+ of_node_put(lt->host_node);
+ return ret;
+}
+
+static int lt8912_put_dt(struct lt8912 *lt)
+{
+ of_node_put(lt->host_node);
+ return 0;
+}
+
+static int lt8912_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ static struct lt8912 *lt;
+ int ret = 0;
+ struct device *dev = &client->dev;
+
+ lt = devm_kzalloc(dev, sizeof(struct lt8912), GFP_KERNEL);
+ if (!lt)
+ return -ENOMEM;
+
+ lt->dev = dev;
+ lt->i2c_client[0] = client;
+
+ ret = lt8912_parse_dt(lt);
+ if (ret)
+ goto err_dt_parse;
+
+ ret = lt8912_init_i2c(lt, client);
+ if (ret)
+ goto err_i2c;
+
+ i2c_set_clientdata(client, lt);
+
+ lt->bridge.funcs = &lt8912_bridge_funcs;
+ lt->bridge.of_node = dev->of_node;
+ lt->bridge.ops = (DRM_BRIDGE_OP_EDID |
+ DRM_BRIDGE_OP_DETECT);
+
+ drm_bridge_add(&lt->bridge);
+
+ ret = lt8912_attach_dsi(lt);
+ if (ret)
+ goto err_attach;
+
+ return 0;
+
+err_attach:
+ drm_bridge_remove(&lt->bridge);
+ lt8912_free_i2c(lt);
+err_i2c:
+ lt8912_put_dt(lt);
+err_dt_parse:
+ return ret;
+}
+
+static void lt8912_remove(struct i2c_client *client)
+{
+ struct lt8912 *lt = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&lt->bridge);
+ lt8912_free_i2c(lt);
+ lt8912_put_dt(lt);
+}
+
+static const struct of_device_id lt8912_dt_match[] = {
+ {.compatible = "lontium,lt8912b"},
+ {}
+};
+MODULE_DEVICE_TABLE(of, lt8912_dt_match);
+
+static const struct i2c_device_id lt8912_id[] = {
+ {"lt8912", 0},
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, lt8912_id);
+
+static struct i2c_driver lt8912_i2c_driver = {
+ .driver = {
+ .name = "lt8912",
+ .of_match_table = lt8912_dt_match,
+ },
+ .probe = lt8912_probe,
+ .remove = lt8912_remove,
+ .id_table = lt8912_id,
+};
+module_i2c_driver(lt8912_i2c_driver);
+
+MODULE_AUTHOR("Adrien Grassein <adrien.grassein@gmail.com>");
+MODULE_DESCRIPTION("lt8912 drm driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/lontium-lt9211.c b/drivers/gpu/drm/bridge/lontium-lt9211.c
new file mode 100644
index 000000000..933ca028d
--- /dev/null
+++ b/drivers/gpu/drm/bridge/lontium-lt9211.c
@@ -0,0 +1,801 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Lontium LT9211 bridge driver
+ *
+ * LT9211 is capable of converting:
+ * 2xDSI/2xLVDS/1xDPI -> 2xDSI/2xLVDS/1xDPI
+ * Currently supported is:
+ * 1xDSI -> 1xLVDS
+ *
+ * Copyright (C) 2022 Marek Vasut <marex@denx.de>
+ */
+
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#define REG_PAGE_CONTROL 0xff
+#define REG_CHIPID0 0x8100
+#define REG_CHIPID0_VALUE 0x18
+#define REG_CHIPID1 0x8101
+#define REG_CHIPID1_VALUE 0x01
+#define REG_CHIPID2 0x8102
+#define REG_CHIPID2_VALUE 0xe3
+
+#define REG_DSI_LANE 0xd000
+/* DSI lane count - 0 means 4 lanes ; 1, 2, 3 means 1, 2, 3 lanes. */
+#define REG_DSI_LANE_COUNT(n) ((n) & 3)
+
+struct lt9211 {
+ struct drm_bridge bridge;
+ struct device *dev;
+ struct regmap *regmap;
+ struct mipi_dsi_device *dsi;
+ struct drm_bridge *panel_bridge;
+ struct gpio_desc *reset_gpio;
+ struct regulator *vccio;
+ bool lvds_dual_link;
+ bool lvds_dual_link_even_odd_swap;
+};
+
+static const struct regmap_range lt9211_rw_ranges[] = {
+ regmap_reg_range(0xff, 0xff),
+ regmap_reg_range(0x8100, 0x816b),
+ regmap_reg_range(0x8200, 0x82aa),
+ regmap_reg_range(0x8500, 0x85ff),
+ regmap_reg_range(0x8600, 0x86a0),
+ regmap_reg_range(0x8700, 0x8746),
+ regmap_reg_range(0xd000, 0xd0a7),
+ regmap_reg_range(0xd400, 0xd42c),
+ regmap_reg_range(0xd800, 0xd838),
+ regmap_reg_range(0xd9c0, 0xd9d5),
+};
+
+static const struct regmap_access_table lt9211_rw_table = {
+ .yes_ranges = lt9211_rw_ranges,
+ .n_yes_ranges = ARRAY_SIZE(lt9211_rw_ranges),
+};
+
+static const struct regmap_range_cfg lt9211_range = {
+ .name = "lt9211",
+ .range_min = 0x0000,
+ .range_max = 0xda00,
+ .selector_reg = REG_PAGE_CONTROL,
+ .selector_mask = 0xff,
+ .selector_shift = 0,
+ .window_start = 0,
+ .window_len = 0x100,
+};
+
+static const struct regmap_config lt9211_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .rd_table = &lt9211_rw_table,
+ .wr_table = &lt9211_rw_table,
+ .volatile_table = &lt9211_rw_table,
+ .ranges = &lt9211_range,
+ .num_ranges = 1,
+ .cache_type = REGCACHE_RBTREE,
+ .max_register = 0xda00,
+};
+
+static struct lt9211 *bridge_to_lt9211(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct lt9211, bridge);
+}
+
+static int lt9211_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct lt9211 *ctx = bridge_to_lt9211(bridge);
+
+ return drm_bridge_attach(bridge->encoder, ctx->panel_bridge,
+ &ctx->bridge, flags);
+}
+
+static int lt9211_read_chipid(struct lt9211 *ctx)
+{
+ u8 chipid[3];
+ int ret;
+
+ /* Read Chip ID registers and verify the chip can communicate. */
+ ret = regmap_bulk_read(ctx->regmap, REG_CHIPID0, chipid, 3);
+ if (ret < 0) {
+ dev_err(ctx->dev, "Failed to read Chip ID: %d\n", ret);
+ return ret;
+ }
+
+ /* Test for known Chip ID. */
+ if (chipid[0] != REG_CHIPID0_VALUE || chipid[1] != REG_CHIPID1_VALUE ||
+ chipid[2] != REG_CHIPID2_VALUE) {
+ dev_err(ctx->dev, "Unknown Chip ID: 0x%02x 0x%02x 0x%02x\n",
+ chipid[0], chipid[1], chipid[2]);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int lt9211_system_init(struct lt9211 *ctx)
+{
+ const struct reg_sequence lt9211_system_init_seq[] = {
+ { 0x8201, 0x18 },
+ { 0x8606, 0x61 },
+ { 0x8607, 0xa8 },
+ { 0x8714, 0x08 },
+ { 0x8715, 0x00 },
+ { 0x8718, 0x0f },
+ { 0x8722, 0x08 },
+ { 0x8723, 0x00 },
+ { 0x8726, 0x0f },
+ { 0x810b, 0xfe },
+ };
+
+ return regmap_multi_reg_write(ctx->regmap, lt9211_system_init_seq,
+ ARRAY_SIZE(lt9211_system_init_seq));
+}
+
+static int lt9211_configure_rx(struct lt9211 *ctx)
+{
+ const struct reg_sequence lt9211_rx_phy_seq[] = {
+ { 0x8202, 0x44 },
+ { 0x8204, 0xa0 },
+ { 0x8205, 0x22 },
+ { 0x8207, 0x9f },
+ { 0x8208, 0xfc },
+ /* ORR with 0xf8 here to enable DSI DN/DP swap. */
+ { 0x8209, 0x01 },
+ { 0x8217, 0x0c },
+ { 0x8633, 0x1b },
+ };
+
+ const struct reg_sequence lt9211_rx_cal_reset_seq[] = {
+ { 0x8120, 0x7f },
+ { 0x8120, 0xff },
+ };
+
+ const struct reg_sequence lt9211_rx_dig_seq[] = {
+ { 0x8630, 0x85 },
+ /* 0x8588: BIT 6 set = MIPI-RX, BIT 4 unset = LVDS-TX */
+ { 0x8588, 0x40 },
+ { 0x85ff, 0xd0 },
+ { REG_DSI_LANE, REG_DSI_LANE_COUNT(ctx->dsi->lanes) },
+ { 0xd002, 0x05 },
+ };
+
+ const struct reg_sequence lt9211_rx_div_reset_seq[] = {
+ { 0x810a, 0xc0 },
+ { 0x8120, 0xbf },
+ };
+
+ const struct reg_sequence lt9211_rx_div_clear_seq[] = {
+ { 0x810a, 0xc1 },
+ { 0x8120, 0xff },
+ };
+
+ int ret;
+
+ ret = regmap_multi_reg_write(ctx->regmap, lt9211_rx_phy_seq,
+ ARRAY_SIZE(lt9211_rx_phy_seq));
+ if (ret)
+ return ret;
+
+ ret = regmap_multi_reg_write(ctx->regmap, lt9211_rx_cal_reset_seq,
+ ARRAY_SIZE(lt9211_rx_cal_reset_seq));
+ if (ret)
+ return ret;
+
+ ret = regmap_multi_reg_write(ctx->regmap, lt9211_rx_dig_seq,
+ ARRAY_SIZE(lt9211_rx_dig_seq));
+ if (ret)
+ return ret;
+
+ ret = regmap_multi_reg_write(ctx->regmap, lt9211_rx_div_reset_seq,
+ ARRAY_SIZE(lt9211_rx_div_reset_seq));
+ if (ret)
+ return ret;
+
+ usleep_range(10000, 15000);
+
+ return regmap_multi_reg_write(ctx->regmap, lt9211_rx_div_clear_seq,
+ ARRAY_SIZE(lt9211_rx_div_clear_seq));
+}
+
+static int lt9211_autodetect_rx(struct lt9211 *ctx,
+ const struct drm_display_mode *mode)
+{
+ u16 width, height;
+ u32 byteclk;
+ u8 buf[5];
+ u8 format;
+ u8 bc[3];
+ int ret;
+
+ /* Measure ByteClock frequency. */
+ ret = regmap_write(ctx->regmap, 0x8600, 0x01);
+ if (ret)
+ return ret;
+
+ /* Give the chip time to lock onto RX stream. */
+ msleep(100);
+
+ /* Read the ByteClock frequency from the chip. */
+ ret = regmap_bulk_read(ctx->regmap, 0x8608, bc, sizeof(bc));
+ if (ret)
+ return ret;
+
+ /* RX ByteClock in kHz */
+ byteclk = ((bc[0] & 0xf) << 16) | (bc[1] << 8) | bc[2];
+
+ /* Width/Height/Format Auto-detection */
+ ret = regmap_bulk_read(ctx->regmap, 0xd082, buf, sizeof(buf));
+ if (ret)
+ return ret;
+
+ width = (buf[0] << 8) | buf[1];
+ height = (buf[3] << 8) | buf[4];
+ format = buf[2] & 0xf;
+
+ if (format == 0x3) { /* YUV422 16bit */
+ width /= 2;
+ } else if (format == 0xa) { /* RGB888 24bit */
+ width /= 3;
+ } else {
+ dev_err(ctx->dev, "Unsupported DSI pixel format 0x%01x\n",
+ format);
+ return -EINVAL;
+ }
+
+ if (width != mode->hdisplay) {
+ dev_err(ctx->dev,
+ "RX: Detected DSI width (%d) does not match mode hdisplay (%d)\n",
+ width, mode->hdisplay);
+ return -EINVAL;
+ }
+
+ if (height != mode->vdisplay) {
+ dev_err(ctx->dev,
+ "RX: Detected DSI height (%d) does not match mode vdisplay (%d)\n",
+ height, mode->vdisplay);
+ return -EINVAL;
+ }
+
+ dev_dbg(ctx->dev, "RX: %dx%d format=0x%01x byteclock=%d kHz\n",
+ width, height, format, byteclk);
+
+ return 0;
+}
+
+static int lt9211_configure_timing(struct lt9211 *ctx,
+ const struct drm_display_mode *mode)
+{
+ const struct reg_sequence lt9211_timing[] = {
+ { 0xd00d, (mode->vtotal >> 8) & 0xff },
+ { 0xd00e, mode->vtotal & 0xff },
+ { 0xd00f, (mode->vdisplay >> 8) & 0xff },
+ { 0xd010, mode->vdisplay & 0xff },
+ { 0xd011, (mode->htotal >> 8) & 0xff },
+ { 0xd012, mode->htotal & 0xff },
+ { 0xd013, (mode->hdisplay >> 8) & 0xff },
+ { 0xd014, mode->hdisplay & 0xff },
+ { 0xd015, (mode->vsync_end - mode->vsync_start) & 0xff },
+ { 0xd016, (mode->hsync_end - mode->hsync_start) & 0xff },
+ { 0xd017, ((mode->vsync_start - mode->vdisplay) >> 8) & 0xff },
+ { 0xd018, (mode->vsync_start - mode->vdisplay) & 0xff },
+ { 0xd019, ((mode->hsync_start - mode->hdisplay) >> 8) & 0xff },
+ { 0xd01a, (mode->hsync_start - mode->hdisplay) & 0xff },
+ };
+
+ return regmap_multi_reg_write(ctx->regmap, lt9211_timing,
+ ARRAY_SIZE(lt9211_timing));
+}
+
+static int lt9211_configure_plls(struct lt9211 *ctx,
+ const struct drm_display_mode *mode)
+{
+ const struct reg_sequence lt9211_pcr_seq[] = {
+ { 0xd026, 0x17 },
+ { 0xd027, 0xc3 },
+ { 0xd02d, 0x30 },
+ { 0xd031, 0x10 },
+ { 0xd023, 0x20 },
+ { 0xd038, 0x02 },
+ { 0xd039, 0x10 },
+ { 0xd03a, 0x20 },
+ { 0xd03b, 0x60 },
+ { 0xd03f, 0x04 },
+ { 0xd040, 0x08 },
+ { 0xd041, 0x10 },
+ { 0x810b, 0xee },
+ { 0x810b, 0xfe },
+ };
+
+ unsigned int pval;
+ int ret;
+
+ /* DeSSC PLL reference clock is 25 MHz XTal. */
+ ret = regmap_write(ctx->regmap, 0x822d, 0x48);
+ if (ret)
+ return ret;
+
+ if (mode->clock < 44000) {
+ ret = regmap_write(ctx->regmap, 0x8235, 0x83);
+ } else if (mode->clock < 88000) {
+ ret = regmap_write(ctx->regmap, 0x8235, 0x82);
+ } else if (mode->clock < 176000) {
+ ret = regmap_write(ctx->regmap, 0x8235, 0x81);
+ } else {
+ dev_err(ctx->dev,
+ "Unsupported mode clock (%d kHz) above 176 MHz.\n",
+ mode->clock);
+ return -EINVAL;
+ }
+
+ if (ret)
+ return ret;
+
+ /* Wait for the DeSSC PLL to stabilize. */
+ msleep(100);
+
+ ret = regmap_multi_reg_write(ctx->regmap, lt9211_pcr_seq,
+ ARRAY_SIZE(lt9211_pcr_seq));
+ if (ret)
+ return ret;
+
+ /* PCR stability test takes seconds. */
+ ret = regmap_read_poll_timeout(ctx->regmap, 0xd087, pval, pval & 0x8,
+ 20000, 10000000);
+ if (ret)
+ dev_err(ctx->dev, "PCR unstable, ret=%i\n", ret);
+
+ return ret;
+}
+
+static int lt9211_configure_tx(struct lt9211 *ctx, bool jeida,
+ bool bpp24, bool de)
+{
+ const struct reg_sequence system_lt9211_tx_phy_seq[] = {
+ /* DPI output disable */
+ { 0x8262, 0x00 },
+ /* BIT(7) is LVDS dual-port */
+ { 0x823b, 0x38 | (ctx->lvds_dual_link ? BIT(7) : 0) },
+ { 0x823e, 0x92 },
+ { 0x823f, 0x48 },
+ { 0x8240, 0x31 },
+ { 0x8243, 0x80 },
+ { 0x8244, 0x00 },
+ { 0x8245, 0x00 },
+ { 0x8249, 0x00 },
+ { 0x824a, 0x01 },
+ { 0x824e, 0x00 },
+ { 0x824f, 0x00 },
+ { 0x8250, 0x00 },
+ { 0x8253, 0x00 },
+ { 0x8254, 0x01 },
+ /* LVDS channel order, Odd:Even 0x10..A:B, 0x40..B:A */
+ { 0x8646, ctx->lvds_dual_link_even_odd_swap ? 0x40 : 0x10 },
+ { 0x8120, 0x7b },
+ { 0x816b, 0xff },
+ };
+
+ const struct reg_sequence system_lt9211_tx_dig_seq[] = {
+ { 0x8559, 0x40 | (jeida ? BIT(7) : 0) |
+ (de ? BIT(5) : 0) | (bpp24 ? BIT(4) : 0) },
+ { 0x855a, 0xaa },
+ { 0x855b, 0xaa },
+ { 0x855c, ctx->lvds_dual_link ? BIT(0) : 0 },
+ { 0x85a1, 0x77 },
+ { 0x8640, 0x40 },
+ { 0x8641, 0x34 },
+ { 0x8642, 0x10 },
+ { 0x8643, 0x23 },
+ { 0x8644, 0x41 },
+ { 0x8645, 0x02 },
+ };
+
+ const struct reg_sequence system_lt9211_tx_pll_seq[] = {
+ /* TX PLL power down */
+ { 0x8236, 0x01 },
+ { 0x8237, ctx->lvds_dual_link ? 0x2a : 0x29 },
+ { 0x8238, 0x06 },
+ { 0x8239, 0x30 },
+ { 0x823a, 0x8e },
+ { 0x8737, 0x14 },
+ { 0x8713, 0x00 },
+ { 0x8713, 0x80 },
+ };
+
+ unsigned int pval;
+ int ret;
+
+ ret = regmap_multi_reg_write(ctx->regmap, system_lt9211_tx_phy_seq,
+ ARRAY_SIZE(system_lt9211_tx_phy_seq));
+ if (ret)
+ return ret;
+
+ ret = regmap_multi_reg_write(ctx->regmap, system_lt9211_tx_dig_seq,
+ ARRAY_SIZE(system_lt9211_tx_dig_seq));
+ if (ret)
+ return ret;
+
+ ret = regmap_multi_reg_write(ctx->regmap, system_lt9211_tx_pll_seq,
+ ARRAY_SIZE(system_lt9211_tx_pll_seq));
+ if (ret)
+ return ret;
+
+ ret = regmap_read_poll_timeout(ctx->regmap, 0x871f, pval, pval & 0x80,
+ 10000, 1000000);
+ if (ret) {
+ dev_err(ctx->dev, "TX PLL unstable, ret=%i\n", ret);
+ return ret;
+ }
+
+ ret = regmap_read_poll_timeout(ctx->regmap, 0x8720, pval, pval & 0x80,
+ 10000, 1000000);
+ if (ret) {
+ dev_err(ctx->dev, "TX PLL unstable, ret=%i\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void lt9211_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct lt9211 *ctx = bridge_to_lt9211(bridge);
+ struct drm_atomic_state *state = old_bridge_state->base.state;
+ const struct drm_bridge_state *bridge_state;
+ const struct drm_crtc_state *crtc_state;
+ const struct drm_display_mode *mode;
+ struct drm_connector *connector;
+ struct drm_crtc *crtc;
+ bool lvds_format_24bpp;
+ bool lvds_format_jeida;
+ u32 bus_flags;
+ int ret;
+
+ ret = regulator_enable(ctx->vccio);
+ if (ret) {
+ dev_err(ctx->dev, "Failed to enable vccio: %d\n", ret);
+ return;
+ }
+
+ /* Deassert reset */
+ gpiod_set_value(ctx->reset_gpio, 1);
+ usleep_range(20000, 21000); /* Very long post-reset delay. */
+
+ /* Get the LVDS format from the bridge state. */
+ bridge_state = drm_atomic_get_new_bridge_state(state, bridge);
+ bus_flags = bridge_state->output_bus_cfg.flags;
+
+ switch (bridge_state->output_bus_cfg.format) {
+ case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
+ lvds_format_24bpp = false;
+ lvds_format_jeida = true;
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
+ lvds_format_24bpp = true;
+ lvds_format_jeida = true;
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
+ lvds_format_24bpp = true;
+ lvds_format_jeida = false;
+ break;
+ default:
+ /*
+ * Some bridges still don't set the correct
+ * LVDS bus pixel format, use SPWG24 default
+ * format until those are fixed.
+ */
+ lvds_format_24bpp = true;
+ lvds_format_jeida = false;
+ dev_warn(ctx->dev,
+ "Unsupported LVDS bus format 0x%04x, please check output bridge driver. Falling back to SPWG24.\n",
+ bridge_state->output_bus_cfg.format);
+ break;
+ }
+
+ /*
+ * Retrieve the CRTC adjusted mode. This requires a little dance to go
+ * from the bridge to the encoder, to the connector and to the CRTC.
+ */
+ connector = drm_atomic_get_new_connector_for_encoder(state,
+ bridge->encoder);
+ crtc = drm_atomic_get_new_connector_state(state, connector)->crtc;
+ crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+ mode = &crtc_state->adjusted_mode;
+
+ ret = lt9211_read_chipid(ctx);
+ if (ret)
+ return;
+
+ ret = lt9211_system_init(ctx);
+ if (ret)
+ return;
+
+ ret = lt9211_configure_rx(ctx);
+ if (ret)
+ return;
+
+ ret = lt9211_autodetect_rx(ctx, mode);
+ if (ret)
+ return;
+
+ ret = lt9211_configure_timing(ctx, mode);
+ if (ret)
+ return;
+
+ ret = lt9211_configure_plls(ctx, mode);
+ if (ret)
+ return;
+
+ ret = lt9211_configure_tx(ctx, lvds_format_jeida, lvds_format_24bpp,
+ bus_flags & DRM_BUS_FLAG_DE_HIGH);
+ if (ret)
+ return;
+
+ dev_dbg(ctx->dev, "LT9211 enabled.\n");
+}
+
+static void lt9211_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct lt9211 *ctx = bridge_to_lt9211(bridge);
+ int ret;
+
+ /*
+ * Put the chip in reset, pull nRST line low,
+ * and assure lengthy 10ms reset low timing.
+ */
+ gpiod_set_value(ctx->reset_gpio, 0);
+ usleep_range(10000, 11000); /* Very long reset duration. */
+
+ ret = regulator_disable(ctx->vccio);
+ if (ret)
+ dev_err(ctx->dev, "Failed to disable vccio: %d\n", ret);
+
+ regcache_mark_dirty(ctx->regmap);
+}
+
+static enum drm_mode_status
+lt9211_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ /* LVDS output clock range 25..176 MHz */
+ if (mode->clock < 25000)
+ return MODE_CLOCK_LOW;
+ if (mode->clock > 176000)
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
+}
+
+#define MAX_INPUT_SEL_FORMATS 1
+
+static u32 *
+lt9211_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ u32 *input_fmts;
+
+ *num_input_fmts = 0;
+
+ input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
+ GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ /* This is the DSI-end bus format */
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
+ *num_input_fmts = 1;
+
+ return input_fmts;
+}
+
+static const struct drm_bridge_funcs lt9211_funcs = {
+ .attach = lt9211_attach,
+ .mode_valid = lt9211_mode_valid,
+ .atomic_enable = lt9211_atomic_enable,
+ .atomic_disable = lt9211_atomic_disable,
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_get_input_bus_fmts = lt9211_atomic_get_input_bus_fmts,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+};
+
+static int lt9211_parse_dt(struct lt9211 *ctx)
+{
+ struct device_node *port2, *port3;
+ struct drm_bridge *panel_bridge;
+ struct device *dev = ctx->dev;
+ struct drm_panel *panel;
+ int dual_link;
+ int ret;
+
+ ctx->vccio = devm_regulator_get(dev, "vccio");
+ if (IS_ERR(ctx->vccio))
+ return dev_err_probe(dev, PTR_ERR(ctx->vccio),
+ "Failed to get supply 'vccio'\n");
+
+ ctx->lvds_dual_link = false;
+ ctx->lvds_dual_link_even_odd_swap = false;
+
+ port2 = of_graph_get_port_by_id(dev->of_node, 2);
+ port3 = of_graph_get_port_by_id(dev->of_node, 3);
+ dual_link = drm_of_lvds_get_dual_link_pixel_order(port2, port3);
+ of_node_put(port2);
+ of_node_put(port3);
+
+ if (dual_link == DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS) {
+ ctx->lvds_dual_link = true;
+ /* Odd pixels to LVDS Channel A, even pixels to B */
+ ctx->lvds_dual_link_even_odd_swap = false;
+ } else if (dual_link == DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS) {
+ ctx->lvds_dual_link = true;
+ /* Even pixels to LVDS Channel A, odd pixels to B */
+ ctx->lvds_dual_link_even_odd_swap = true;
+ }
+
+ ret = drm_of_find_panel_or_bridge(dev->of_node, 2, 0, &panel, &panel_bridge);
+ if (ret < 0)
+ return ret;
+ if (panel) {
+ panel_bridge = devm_drm_panel_bridge_add(dev, panel);
+ if (IS_ERR(panel_bridge))
+ return PTR_ERR(panel_bridge);
+ }
+
+ ctx->panel_bridge = panel_bridge;
+
+ return 0;
+}
+
+static int lt9211_host_attach(struct lt9211 *ctx)
+{
+ const struct mipi_dsi_device_info info = {
+ .type = "lt9211",
+ .channel = 0,
+ .node = NULL,
+ };
+ struct device *dev = ctx->dev;
+ struct device_node *host_node;
+ struct device_node *endpoint;
+ struct mipi_dsi_device *dsi;
+ struct mipi_dsi_host *host;
+ int dsi_lanes;
+ int ret;
+
+ endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
+ dsi_lanes = drm_of_get_data_lanes_count(endpoint, 1, 4);
+ host_node = of_graph_get_remote_port_parent(endpoint);
+ host = of_find_mipi_dsi_host_by_node(host_node);
+ of_node_put(host_node);
+ of_node_put(endpoint);
+
+ if (!host)
+ return -EPROBE_DEFER;
+
+ if (dsi_lanes < 0)
+ return dsi_lanes;
+
+ dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
+ if (IS_ERR(dsi))
+ return dev_err_probe(dev, PTR_ERR(dsi),
+ "failed to create dsi device\n");
+
+ ctx->dsi = dsi;
+
+ dsi->lanes = dsi_lanes;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
+ MIPI_DSI_MODE_VIDEO_HSE;
+
+ ret = devm_mipi_dsi_attach(dev, dsi);
+ if (ret < 0) {
+ dev_err(dev, "failed to attach dsi to host: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int lt9211_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct lt9211 *ctx;
+ int ret;
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->dev = dev;
+
+ /*
+ * Put the chip in reset, pull nRST line low,
+ * and assure lengthy 10ms reset low timing.
+ */
+ ctx->reset_gpio = devm_gpiod_get_optional(ctx->dev, "reset",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(ctx->reset_gpio))
+ return PTR_ERR(ctx->reset_gpio);
+
+ usleep_range(10000, 11000); /* Very long reset duration. */
+
+ ret = lt9211_parse_dt(ctx);
+ if (ret)
+ return ret;
+
+ ctx->regmap = devm_regmap_init_i2c(client, &lt9211_regmap_config);
+ if (IS_ERR(ctx->regmap))
+ return PTR_ERR(ctx->regmap);
+
+ dev_set_drvdata(dev, ctx);
+ i2c_set_clientdata(client, ctx);
+
+ ctx->bridge.funcs = &lt9211_funcs;
+ ctx->bridge.of_node = dev->of_node;
+ drm_bridge_add(&ctx->bridge);
+
+ ret = lt9211_host_attach(ctx);
+ if (ret)
+ drm_bridge_remove(&ctx->bridge);
+
+ return ret;
+}
+
+static void lt9211_remove(struct i2c_client *client)
+{
+ struct lt9211 *ctx = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&ctx->bridge);
+}
+
+static struct i2c_device_id lt9211_id[] = {
+ { "lontium,lt9211" },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, lt9211_id);
+
+static const struct of_device_id lt9211_match_table[] = {
+ { .compatible = "lontium,lt9211" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, lt9211_match_table);
+
+static struct i2c_driver lt9211_driver = {
+ .probe = lt9211_probe,
+ .remove = lt9211_remove,
+ .id_table = lt9211_id,
+ .driver = {
+ .name = "lt9211",
+ .of_match_table = lt9211_match_table,
+ },
+};
+module_i2c_driver(lt9211_driver);
+
+MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
+MODULE_DESCRIPTION("Lontium LT9211 DSI/LVDS/DPI bridge driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c
new file mode 100644
index 000000000..ae8c6d9d4
--- /dev/null
+++ b/drivers/gpu/drm/bridge/lontium-lt9611.c
@@ -0,0 +1,1267 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2019-2020. Linaro Limited.
+ */
+
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+#include <sound/hdmi-codec.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#define EDID_SEG_SIZE 256
+#define EDID_LEN 32
+#define EDID_LOOP 8
+#define KEY_DDC_ACCS_DONE 0x02
+#define DDC_NO_ACK 0x50
+
+#define LT9611_4LANES 0
+
+struct lt9611 {
+ struct device *dev;
+ struct drm_bridge bridge;
+ struct drm_connector connector;
+
+ struct regmap *regmap;
+
+ struct device_node *dsi0_node;
+ struct device_node *dsi1_node;
+ struct mipi_dsi_device *dsi0;
+ struct mipi_dsi_device *dsi1;
+ struct platform_device *audio_pdev;
+
+ bool ac_mode;
+
+ struct gpio_desc *reset_gpio;
+ struct gpio_desc *enable_gpio;
+
+ bool power_on;
+ bool sleep;
+
+ struct regulator_bulk_data supplies[2];
+
+ struct i2c_client *client;
+
+ enum drm_connector_status status;
+
+ u8 edid_buf[EDID_SEG_SIZE];
+ u32 vic;
+};
+
+#define LT9611_PAGE_CONTROL 0xff
+
+static const struct regmap_range_cfg lt9611_ranges[] = {
+ {
+ .name = "register_range",
+ .range_min = 0,
+ .range_max = 0x85ff,
+ .selector_reg = LT9611_PAGE_CONTROL,
+ .selector_mask = 0xff,
+ .selector_shift = 0,
+ .window_start = 0,
+ .window_len = 0x100,
+ },
+};
+
+static const struct regmap_config lt9611_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0xffff,
+ .ranges = lt9611_ranges,
+ .num_ranges = ARRAY_SIZE(lt9611_ranges),
+};
+
+struct lt9611_mode {
+ u16 hdisplay;
+ u16 vdisplay;
+ u8 vrefresh;
+ u8 lanes;
+ u8 intfs;
+};
+
+static struct lt9611_mode lt9611_modes[] = {
+ { 3840, 2160, 30, 4, 2 }, /* 3840x2160 24bit 30Hz 4Lane 2ports */
+ { 1920, 1080, 60, 4, 1 }, /* 1080P 24bit 60Hz 4lane 1port */
+ { 1920, 1080, 30, 3, 1 }, /* 1080P 24bit 30Hz 3lane 1port */
+ { 1920, 1080, 24, 3, 1 },
+ { 720, 480, 60, 4, 1 },
+ { 720, 576, 50, 2, 1 },
+ { 640, 480, 60, 2, 1 },
+};
+
+static struct lt9611 *bridge_to_lt9611(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct lt9611, bridge);
+}
+
+static struct lt9611 *connector_to_lt9611(struct drm_connector *connector)
+{
+ return container_of(connector, struct lt9611, connector);
+}
+
+static int lt9611_mipi_input_analog(struct lt9611 *lt9611)
+{
+ const struct reg_sequence reg_cfg[] = {
+ { 0x8106, 0x40 }, /* port A rx current */
+ { 0x810a, 0xfe }, /* port A ldo voltage set */
+ { 0x810b, 0xbf }, /* enable port A lprx */
+ { 0x8111, 0x40 }, /* port B rx current */
+ { 0x8115, 0xfe }, /* port B ldo voltage set */
+ { 0x8116, 0xbf }, /* enable port B lprx */
+
+ { 0x811c, 0x03 }, /* PortA clk lane no-LP mode */
+ { 0x8120, 0x03 }, /* PortB clk lane with-LP mode */
+ };
+
+ return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
+}
+
+static int lt9611_mipi_input_digital(struct lt9611 *lt9611,
+ const struct drm_display_mode *mode)
+{
+ struct reg_sequence reg_cfg[] = {
+ { 0x8300, LT9611_4LANES },
+ { 0x830a, 0x00 },
+ { 0x824f, 0x80 },
+ { 0x8250, 0x10 },
+ { 0x8302, 0x0a },
+ { 0x8306, 0x0a },
+ };
+
+ if (mode->hdisplay == 3840)
+ reg_cfg[1].def = 0x03;
+
+ return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
+}
+
+static void lt9611_mipi_video_setup(struct lt9611 *lt9611,
+ const struct drm_display_mode *mode)
+{
+ u32 h_total, hactive, hsync_len, hfront_porch, hsync_porch;
+ u32 v_total, vactive, vsync_len, vfront_porch, vsync_porch;
+
+ h_total = mode->htotal;
+ v_total = mode->vtotal;
+
+ hactive = mode->hdisplay;
+ hsync_len = mode->hsync_end - mode->hsync_start;
+ hfront_porch = mode->hsync_start - mode->hdisplay;
+ hsync_porch = hsync_len + mode->htotal - mode->hsync_end;
+
+ vactive = mode->vdisplay;
+ vsync_len = mode->vsync_end - mode->vsync_start;
+ vfront_porch = mode->vsync_start - mode->vdisplay;
+ vsync_porch = vsync_len + mode->vtotal - mode->vsync_end;
+
+ regmap_write(lt9611->regmap, 0x830d, (u8)(v_total / 256));
+ regmap_write(lt9611->regmap, 0x830e, (u8)(v_total % 256));
+
+ regmap_write(lt9611->regmap, 0x830f, (u8)(vactive / 256));
+ regmap_write(lt9611->regmap, 0x8310, (u8)(vactive % 256));
+
+ regmap_write(lt9611->regmap, 0x8311, (u8)(h_total / 256));
+ regmap_write(lt9611->regmap, 0x8312, (u8)(h_total % 256));
+
+ regmap_write(lt9611->regmap, 0x8313, (u8)(hactive / 256));
+ regmap_write(lt9611->regmap, 0x8314, (u8)(hactive % 256));
+
+ regmap_write(lt9611->regmap, 0x8315, (u8)(vsync_len % 256));
+ regmap_write(lt9611->regmap, 0x8316, (u8)(hsync_len % 256));
+
+ regmap_write(lt9611->regmap, 0x8317, (u8)(vfront_porch % 256));
+
+ regmap_write(lt9611->regmap, 0x8318, (u8)(vsync_porch % 256));
+
+ regmap_write(lt9611->regmap, 0x8319, (u8)(hfront_porch % 256));
+
+ regmap_write(lt9611->regmap, 0x831a, (u8)(hsync_porch / 256) |
+ ((hfront_porch / 256) << 4));
+ regmap_write(lt9611->regmap, 0x831b, (u8)(hsync_porch % 256));
+}
+
+static void lt9611_pcr_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode, unsigned int postdiv)
+{
+ unsigned int pcr_m = mode->clock * 5 * postdiv / 27000;
+ const struct reg_sequence reg_cfg[] = {
+ { 0x830b, 0x01 },
+ { 0x830c, 0x10 },
+ { 0x8348, 0x00 },
+ { 0x8349, 0x81 },
+
+ /* stage 1 */
+ { 0x8321, 0x4a },
+ { 0x8324, 0x71 },
+ { 0x8325, 0x30 },
+ { 0x832a, 0x01 },
+
+ /* stage 2 */
+ { 0x834a, 0x40 },
+
+ /* MK limit */
+ { 0x832d, 0x38 },
+ { 0x8331, 0x08 },
+ };
+ const struct reg_sequence reg_cfg2[] = {
+ { 0x830b, 0x03 },
+ { 0x830c, 0xd0 },
+ { 0x8348, 0x03 },
+ { 0x8349, 0xe0 },
+ { 0x8324, 0x72 },
+ { 0x8325, 0x00 },
+ { 0x832a, 0x01 },
+ { 0x834a, 0x10 },
+ };
+ u8 pol = 0x10;
+
+ if (mode->flags & DRM_MODE_FLAG_NHSYNC)
+ pol |= 0x2;
+ if (mode->flags & DRM_MODE_FLAG_NVSYNC)
+ pol |= 0x1;
+ regmap_write(lt9611->regmap, 0x831d, pol);
+
+ if (mode->hdisplay == 3840)
+ regmap_multi_reg_write(lt9611->regmap, reg_cfg2, ARRAY_SIZE(reg_cfg2));
+ else
+ regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
+
+ regmap_write(lt9611->regmap, 0x8326, pcr_m);
+
+ /* pcr rst */
+ regmap_write(lt9611->regmap, 0x8011, 0x5a);
+ regmap_write(lt9611->regmap, 0x8011, 0xfa);
+}
+
+static int lt9611_pll_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode, unsigned int *postdiv)
+{
+ unsigned int pclk = mode->clock;
+ const struct reg_sequence reg_cfg[] = {
+ /* txpll init */
+ { 0x8123, 0x40 },
+ { 0x8124, 0x64 },
+ { 0x8125, 0x80 },
+ { 0x8126, 0x55 },
+ { 0x812c, 0x37 },
+ { 0x812f, 0x01 },
+ { 0x8126, 0x55 },
+ { 0x8127, 0x66 },
+ { 0x8128, 0x88 },
+ { 0x812a, 0x20 },
+ };
+
+ regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
+
+ if (pclk > 150000) {
+ regmap_write(lt9611->regmap, 0x812d, 0x88);
+ *postdiv = 1;
+ } else if (pclk > 70000) {
+ regmap_write(lt9611->regmap, 0x812d, 0x99);
+ *postdiv = 2;
+ } else {
+ regmap_write(lt9611->regmap, 0x812d, 0xaa);
+ *postdiv = 4;
+ }
+
+ /*
+ * first divide pclk by 2 first
+ * - write divide by 64k to 19:16 bits which means shift by 17
+ * - write divide by 256 to 15:8 bits which means shift by 9
+ * - write remainder to 7:0 bits, which means shift by 1
+ */
+ regmap_write(lt9611->regmap, 0x82e3, pclk >> 17); /* pclk[19:16] */
+ regmap_write(lt9611->regmap, 0x82e4, pclk >> 9); /* pclk[15:8] */
+ regmap_write(lt9611->regmap, 0x82e5, pclk >> 1); /* pclk[7:0] */
+
+ regmap_write(lt9611->regmap, 0x82de, 0x20);
+ regmap_write(lt9611->regmap, 0x82de, 0xe0);
+
+ regmap_write(lt9611->regmap, 0x8016, 0xf1);
+ regmap_write(lt9611->regmap, 0x8016, 0xf3);
+
+ return 0;
+}
+
+static int lt9611_read_video_check(struct lt9611 *lt9611, unsigned int reg)
+{
+ unsigned int temp, temp2;
+ int ret;
+
+ ret = regmap_read(lt9611->regmap, reg, &temp);
+ if (ret)
+ return ret;
+ temp <<= 8;
+ ret = regmap_read(lt9611->regmap, reg + 1, &temp2);
+ if (ret)
+ return ret;
+
+ return (temp + temp2);
+}
+
+static int lt9611_video_check(struct lt9611 *lt9611)
+{
+ u32 v_total, vactive, hactive_a, hactive_b, h_total_sysclk;
+ int temp;
+
+ /* top module video check */
+
+ /* vactive */
+ temp = lt9611_read_video_check(lt9611, 0x8282);
+ if (temp < 0)
+ goto end;
+ vactive = temp;
+
+ /* v_total */
+ temp = lt9611_read_video_check(lt9611, 0x826c);
+ if (temp < 0)
+ goto end;
+ v_total = temp;
+
+ /* h_total_sysclk */
+ temp = lt9611_read_video_check(lt9611, 0x8286);
+ if (temp < 0)
+ goto end;
+ h_total_sysclk = temp;
+
+ /* hactive_a */
+ temp = lt9611_read_video_check(lt9611, 0x8382);
+ if (temp < 0)
+ goto end;
+ hactive_a = temp / 3;
+
+ /* hactive_b */
+ temp = lt9611_read_video_check(lt9611, 0x8386);
+ if (temp < 0)
+ goto end;
+ hactive_b = temp / 3;
+
+ dev_info(lt9611->dev,
+ "video check: hactive_a=%d, hactive_b=%d, vactive=%d, v_total=%d, h_total_sysclk=%d\n",
+ hactive_a, hactive_b, vactive, v_total, h_total_sysclk);
+
+ return 0;
+
+end:
+ dev_err(lt9611->dev, "read video check error\n");
+ return temp;
+}
+
+static void lt9611_hdmi_tx_digital(struct lt9611 *lt9611)
+{
+ regmap_write(lt9611->regmap, 0x8443, 0x46 - lt9611->vic);
+ regmap_write(lt9611->regmap, 0x8447, lt9611->vic);
+ regmap_write(lt9611->regmap, 0x843d, 0x0a); /* UD1 infoframe */
+
+ regmap_write(lt9611->regmap, 0x82d6, 0x8c);
+ regmap_write(lt9611->regmap, 0x82d7, 0x04);
+}
+
+static void lt9611_hdmi_tx_phy(struct lt9611 *lt9611)
+{
+ struct reg_sequence reg_cfg[] = {
+ { 0x8130, 0x6a },
+ { 0x8131, 0x44 }, /* HDMI DC mode */
+ { 0x8132, 0x4a },
+ { 0x8133, 0x0b },
+ { 0x8134, 0x00 },
+ { 0x8135, 0x00 },
+ { 0x8136, 0x00 },
+ { 0x8137, 0x44 },
+ { 0x813f, 0x0f },
+ { 0x8140, 0xa0 },
+ { 0x8141, 0xa0 },
+ { 0x8142, 0xa0 },
+ { 0x8143, 0xa0 },
+ { 0x8144, 0x0a },
+ };
+
+ /* HDMI AC mode */
+ if (lt9611->ac_mode)
+ reg_cfg[2].def = 0x73;
+
+ regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
+}
+
+static irqreturn_t lt9611_irq_thread_handler(int irq, void *dev_id)
+{
+ struct lt9611 *lt9611 = dev_id;
+ unsigned int irq_flag0 = 0;
+ unsigned int irq_flag3 = 0;
+
+ regmap_read(lt9611->regmap, 0x820f, &irq_flag3);
+ regmap_read(lt9611->regmap, 0x820c, &irq_flag0);
+
+ /* hpd changed low */
+ if (irq_flag3 & 0x80) {
+ dev_info(lt9611->dev, "hdmi cable disconnected\n");
+
+ regmap_write(lt9611->regmap, 0x8207, 0xbf);
+ regmap_write(lt9611->regmap, 0x8207, 0x3f);
+ }
+
+ /* hpd changed high */
+ if (irq_flag3 & 0x40) {
+ dev_info(lt9611->dev, "hdmi cable connected\n");
+
+ regmap_write(lt9611->regmap, 0x8207, 0x7f);
+ regmap_write(lt9611->regmap, 0x8207, 0x3f);
+ }
+
+ if (irq_flag3 & 0xc0 && lt9611->bridge.dev)
+ drm_kms_helper_hotplug_event(lt9611->bridge.dev);
+
+ /* video input changed */
+ if (irq_flag0 & 0x01) {
+ dev_info(lt9611->dev, "video input changed\n");
+ regmap_write(lt9611->regmap, 0x829e, 0xff);
+ regmap_write(lt9611->regmap, 0x829e, 0xf7);
+ regmap_write(lt9611->regmap, 0x8204, 0xff);
+ regmap_write(lt9611->regmap, 0x8204, 0xfe);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static void lt9611_enable_hpd_interrupts(struct lt9611 *lt9611)
+{
+ unsigned int val;
+
+ regmap_read(lt9611->regmap, 0x8203, &val);
+
+ val &= ~0xc0;
+ regmap_write(lt9611->regmap, 0x8203, val);
+ regmap_write(lt9611->regmap, 0x8207, 0xff); /* clear */
+ regmap_write(lt9611->regmap, 0x8207, 0x3f);
+}
+
+static void lt9611_sleep_setup(struct lt9611 *lt9611)
+{
+ const struct reg_sequence sleep_setup[] = {
+ { 0x8024, 0x76 },
+ { 0x8023, 0x01 },
+ { 0x8157, 0x03 }, /* set addr pin as output */
+ { 0x8149, 0x0b },
+
+ { 0x8102, 0x48 }, /* MIPI Rx power down */
+ { 0x8123, 0x80 },
+ { 0x8130, 0x00 },
+ { 0x8011, 0x0a },
+ };
+
+ regmap_multi_reg_write(lt9611->regmap,
+ sleep_setup, ARRAY_SIZE(sleep_setup));
+ lt9611->sleep = true;
+}
+
+static int lt9611_power_on(struct lt9611 *lt9611)
+{
+ int ret;
+ const struct reg_sequence seq[] = {
+ /* LT9611_System_Init */
+ { 0x8101, 0x18 }, /* sel xtal clock */
+
+ /* timer for frequency meter */
+ { 0x821b, 0x69 }, /* timer 2 */
+ { 0x821c, 0x78 },
+ { 0x82cb, 0x69 }, /* timer 1 */
+ { 0x82cc, 0x78 },
+
+ /* irq init */
+ { 0x8251, 0x01 },
+ { 0x8258, 0x0a }, /* hpd irq */
+ { 0x8259, 0x80 }, /* hpd debounce width */
+ { 0x829e, 0xf7 }, /* video check irq */
+
+ /* power consumption for work */
+ { 0x8004, 0xf0 },
+ { 0x8006, 0xf0 },
+ { 0x800a, 0x80 },
+ { 0x800b, 0x40 },
+ { 0x800d, 0xef },
+ { 0x8011, 0xfa },
+ };
+
+ if (lt9611->power_on)
+ return 0;
+
+ ret = regmap_multi_reg_write(lt9611->regmap, seq, ARRAY_SIZE(seq));
+ if (!ret)
+ lt9611->power_on = true;
+
+ return ret;
+}
+
+static int lt9611_power_off(struct lt9611 *lt9611)
+{
+ int ret;
+
+ ret = regmap_write(lt9611->regmap, 0x8130, 0x6a);
+ if (!ret)
+ lt9611->power_on = false;
+
+ return ret;
+}
+
+static void lt9611_reset(struct lt9611 *lt9611)
+{
+ gpiod_set_value_cansleep(lt9611->reset_gpio, 1);
+ msleep(20);
+
+ gpiod_set_value_cansleep(lt9611->reset_gpio, 0);
+ msleep(20);
+
+ gpiod_set_value_cansleep(lt9611->reset_gpio, 1);
+ msleep(100);
+}
+
+static void lt9611_assert_5v(struct lt9611 *lt9611)
+{
+ if (!lt9611->enable_gpio)
+ return;
+
+ gpiod_set_value_cansleep(lt9611->enable_gpio, 1);
+ msleep(20);
+}
+
+static int lt9611_regulator_init(struct lt9611 *lt9611)
+{
+ int ret;
+
+ lt9611->supplies[0].supply = "vdd";
+ lt9611->supplies[1].supply = "vcc";
+
+ ret = devm_regulator_bulk_get(lt9611->dev, 2, lt9611->supplies);
+ if (ret < 0)
+ return ret;
+
+ return regulator_set_load(lt9611->supplies[0].consumer, 300000);
+}
+
+static int lt9611_regulator_enable(struct lt9611 *lt9611)
+{
+ int ret;
+
+ ret = regulator_enable(lt9611->supplies[0].consumer);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(1000, 10000);
+
+ ret = regulator_enable(lt9611->supplies[1].consumer);
+ if (ret < 0) {
+ regulator_disable(lt9611->supplies[0].consumer);
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct lt9611_mode *lt9611_find_mode(const struct drm_display_mode *mode)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(lt9611_modes); i++) {
+ if (lt9611_modes[i].hdisplay == mode->hdisplay &&
+ lt9611_modes[i].vdisplay == mode->vdisplay &&
+ lt9611_modes[i].vrefresh == drm_mode_vrefresh(mode)) {
+ return &lt9611_modes[i];
+ }
+ }
+
+ return NULL;
+}
+
+/* connector funcs */
+static enum drm_connector_status __lt9611_detect(struct lt9611 *lt9611)
+{
+ unsigned int reg_val = 0;
+ int connected = 0;
+
+ regmap_read(lt9611->regmap, 0x825e, &reg_val);
+ connected = (reg_val & (BIT(2) | BIT(0)));
+
+ lt9611->status = connected ? connector_status_connected :
+ connector_status_disconnected;
+
+ return lt9611->status;
+}
+
+static enum drm_connector_status
+lt9611_connector_detect(struct drm_connector *connector, bool force)
+{
+ return __lt9611_detect(connector_to_lt9611(connector));
+}
+
+static int lt9611_read_edid(struct lt9611 *lt9611)
+{
+ unsigned int temp;
+ int ret = 0;
+ int i, j;
+
+ /* memset to clear old buffer, if any */
+ memset(lt9611->edid_buf, 0, sizeof(lt9611->edid_buf));
+
+ regmap_write(lt9611->regmap, 0x8503, 0xc9);
+
+ /* 0xA0 is EDID device address */
+ regmap_write(lt9611->regmap, 0x8504, 0xa0);
+ /* 0x00 is EDID offset address */
+ regmap_write(lt9611->regmap, 0x8505, 0x00);
+
+ /* length for read */
+ regmap_write(lt9611->regmap, 0x8506, EDID_LEN);
+ regmap_write(lt9611->regmap, 0x8514, 0x7f);
+
+ for (i = 0; i < EDID_LOOP; i++) {
+ /* offset address */
+ regmap_write(lt9611->regmap, 0x8505, i * EDID_LEN);
+ regmap_write(lt9611->regmap, 0x8507, 0x36);
+ regmap_write(lt9611->regmap, 0x8507, 0x31);
+ regmap_write(lt9611->regmap, 0x8507, 0x37);
+ usleep_range(5000, 10000);
+
+ regmap_read(lt9611->regmap, 0x8540, &temp);
+
+ if (temp & KEY_DDC_ACCS_DONE) {
+ for (j = 0; j < EDID_LEN; j++) {
+ regmap_read(lt9611->regmap, 0x8583, &temp);
+ lt9611->edid_buf[i * EDID_LEN + j] = temp;
+ }
+
+ } else if (temp & DDC_NO_ACK) { /* DDC No Ack or Abitration lost */
+ dev_err(lt9611->dev, "read edid failed: no ack\n");
+ ret = -EIO;
+ goto end;
+
+ } else {
+ dev_err(lt9611->dev, "read edid failed: access not done\n");
+ ret = -EIO;
+ goto end;
+ }
+ }
+
+end:
+ regmap_write(lt9611->regmap, 0x8507, 0x1f);
+ return ret;
+}
+
+static int
+lt9611_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len)
+{
+ struct lt9611 *lt9611 = data;
+ int ret;
+
+ if (len > 128)
+ return -EINVAL;
+
+ /* supports up to 1 extension block */
+ /* TODO: add support for more extension blocks */
+ if (block > 1)
+ return -EINVAL;
+
+ if (block == 0) {
+ ret = lt9611_read_edid(lt9611);
+ if (ret) {
+ dev_err(lt9611->dev, "edid read failed\n");
+ return ret;
+ }
+ }
+
+ block %= 2;
+ memcpy(buf, lt9611->edid_buf + (block * 128), len);
+
+ return 0;
+}
+
+static int lt9611_connector_get_modes(struct drm_connector *connector)
+{
+ struct lt9611 *lt9611 = connector_to_lt9611(connector);
+ unsigned int count;
+ struct edid *edid;
+
+ lt9611_power_on(lt9611);
+ edid = drm_do_get_edid(connector, lt9611_get_edid_block, lt9611);
+ drm_connector_update_edid_property(connector, edid);
+ count = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+
+ return count;
+}
+
+static enum drm_mode_status
+lt9611_connector_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode);
+
+ return lt9611_mode ? MODE_OK : MODE_BAD;
+}
+
+/* bridge funcs */
+static void
+lt9611_bridge_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
+
+ if (lt9611_power_on(lt9611)) {
+ dev_err(lt9611->dev, "power on failed\n");
+ return;
+ }
+
+ lt9611_mipi_input_analog(lt9611);
+ lt9611_hdmi_tx_digital(lt9611);
+ lt9611_hdmi_tx_phy(lt9611);
+
+ msleep(500);
+
+ lt9611_video_check(lt9611);
+
+ /* Enable HDMI output */
+ regmap_write(lt9611->regmap, 0x8130, 0xea);
+}
+
+static void
+lt9611_bridge_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
+ int ret;
+
+ /* Disable HDMI output */
+ ret = regmap_write(lt9611->regmap, 0x8130, 0x6a);
+ if (ret) {
+ dev_err(lt9611->dev, "video on failed\n");
+ return;
+ }
+
+ if (lt9611_power_off(lt9611)) {
+ dev_err(lt9611->dev, "power on failed\n");
+ return;
+ }
+}
+
+static struct
+drm_connector_helper_funcs lt9611_bridge_connector_helper_funcs = {
+ .get_modes = lt9611_connector_get_modes,
+ .mode_valid = lt9611_connector_mode_valid,
+};
+
+static const struct drm_connector_funcs lt9611_bridge_connector_funcs = {
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .detect = lt9611_connector_detect,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611,
+ struct device_node *dsi_node)
+{
+ const struct mipi_dsi_device_info info = { "lt9611", 0, lt9611->dev->of_node};
+ struct mipi_dsi_device *dsi;
+ struct mipi_dsi_host *host;
+ struct device *dev = lt9611->dev;
+ int ret;
+
+ host = of_find_mipi_dsi_host_by_node(dsi_node);
+ if (!host) {
+ dev_err(lt9611->dev, "failed to find dsi host\n");
+ return ERR_PTR(-EPROBE_DEFER);
+ }
+
+ dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
+ if (IS_ERR(dsi)) {
+ dev_err(lt9611->dev, "failed to create dsi device\n");
+ return dsi;
+ }
+
+ dsi->lanes = 4;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
+ MIPI_DSI_MODE_VIDEO_HSE;
+
+ ret = devm_mipi_dsi_attach(dev, dsi);
+ if (ret < 0) {
+ dev_err(dev, "failed to attach dsi to host\n");
+ return ERR_PTR(ret);
+ }
+
+ return dsi;
+}
+
+static int lt9611_connector_init(struct drm_bridge *bridge, struct lt9611 *lt9611)
+{
+ int ret;
+
+ ret = drm_connector_init(bridge->dev, &lt9611->connector,
+ &lt9611_bridge_connector_funcs,
+ DRM_MODE_CONNECTOR_HDMIA);
+ if (ret) {
+ DRM_ERROR("Failed to initialize connector with drm\n");
+ return ret;
+ }
+
+ drm_connector_helper_add(&lt9611->connector,
+ &lt9611_bridge_connector_helper_funcs);
+
+ if (!bridge->encoder) {
+ DRM_ERROR("Parent encoder object not found");
+ return -ENODEV;
+ }
+
+ drm_connector_attach_encoder(&lt9611->connector, bridge->encoder);
+
+ return 0;
+}
+
+static int lt9611_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
+ int ret;
+
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+ ret = lt9611_connector_init(bridge, lt9611);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode);
+ struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
+
+ if (!lt9611_mode)
+ return MODE_BAD;
+ else if (lt9611_mode->intfs > 1 && !lt9611->dsi1)
+ return MODE_PANEL;
+ else
+ return MODE_OK;
+}
+
+static void lt9611_bridge_pre_enable(struct drm_bridge *bridge)
+{
+ struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
+ static const struct reg_sequence reg_cfg[] = {
+ { 0x8102, 0x12 },
+ { 0x8123, 0x40 },
+ { 0x8130, 0xea },
+ { 0x8011, 0xfa },
+ };
+
+ if (!lt9611->sleep)
+ return;
+
+ regmap_multi_reg_write(lt9611->regmap,
+ reg_cfg, ARRAY_SIZE(reg_cfg));
+
+ lt9611->sleep = false;
+}
+
+static void
+lt9611_bridge_atomic_post_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
+
+ lt9611_sleep_setup(lt9611);
+}
+
+static void lt9611_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adj_mode)
+{
+ struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
+ struct hdmi_avi_infoframe avi_frame;
+ unsigned int postdiv;
+ int ret;
+
+ lt9611_bridge_pre_enable(bridge);
+
+ lt9611_mipi_input_digital(lt9611, mode);
+ lt9611_pll_setup(lt9611, mode, &postdiv);
+ lt9611_mipi_video_setup(lt9611, mode);
+ lt9611_pcr_setup(lt9611, mode, postdiv);
+
+ ret = drm_hdmi_avi_infoframe_from_display_mode(&avi_frame,
+ &lt9611->connector,
+ mode);
+ if (!ret)
+ lt9611->vic = avi_frame.video_code;
+}
+
+static enum drm_connector_status lt9611_bridge_detect(struct drm_bridge *bridge)
+{
+ return __lt9611_detect(bridge_to_lt9611(bridge));
+}
+
+static struct edid *lt9611_bridge_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
+
+ lt9611_power_on(lt9611);
+ return drm_do_get_edid(connector, lt9611_get_edid_block, lt9611);
+}
+
+static void lt9611_bridge_hpd_enable(struct drm_bridge *bridge)
+{
+ struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
+
+ lt9611_enable_hpd_interrupts(lt9611);
+}
+
+#define MAX_INPUT_SEL_FORMATS 1
+
+static u32 *
+lt9611_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ u32 *input_fmts;
+
+ *num_input_fmts = 0;
+
+ input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
+ GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ /* This is the DSI-end bus format */
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
+ *num_input_fmts = 1;
+
+ return input_fmts;
+}
+
+static const struct drm_bridge_funcs lt9611_bridge_funcs = {
+ .attach = lt9611_bridge_attach,
+ .mode_valid = lt9611_bridge_mode_valid,
+ .mode_set = lt9611_bridge_mode_set,
+ .detect = lt9611_bridge_detect,
+ .get_edid = lt9611_bridge_get_edid,
+ .hpd_enable = lt9611_bridge_hpd_enable,
+
+ .atomic_enable = lt9611_bridge_atomic_enable,
+ .atomic_disable = lt9611_bridge_atomic_disable,
+ .atomic_post_disable = lt9611_bridge_atomic_post_disable,
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .atomic_get_input_bus_fmts = lt9611_atomic_get_input_bus_fmts,
+};
+
+static int lt9611_parse_dt(struct device *dev,
+ struct lt9611 *lt9611)
+{
+ lt9611->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1);
+ if (!lt9611->dsi0_node) {
+ dev_err(lt9611->dev, "failed to get remote node for primary dsi\n");
+ return -ENODEV;
+ }
+
+ lt9611->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1);
+
+ lt9611->ac_mode = of_property_read_bool(dev->of_node, "lt,ac-mode");
+
+ return 0;
+}
+
+static int lt9611_gpio_init(struct lt9611 *lt9611)
+{
+ struct device *dev = lt9611->dev;
+
+ lt9611->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(lt9611->reset_gpio)) {
+ dev_err(dev, "failed to acquire reset gpio\n");
+ return PTR_ERR(lt9611->reset_gpio);
+ }
+
+ lt9611->enable_gpio = devm_gpiod_get_optional(dev, "enable",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(lt9611->enable_gpio)) {
+ dev_err(dev, "failed to acquire enable gpio\n");
+ return PTR_ERR(lt9611->enable_gpio);
+ }
+
+ return 0;
+}
+
+static int lt9611_read_device_rev(struct lt9611 *lt9611)
+{
+ unsigned int rev;
+ int ret;
+
+ regmap_write(lt9611->regmap, 0x80ee, 0x01);
+ ret = regmap_read(lt9611->regmap, 0x8002, &rev);
+ if (ret)
+ dev_err(lt9611->dev, "failed to read revision: %d\n", ret);
+ else
+ dev_info(lt9611->dev, "LT9611 revision: 0x%x\n", rev);
+
+ return ret;
+}
+
+static int lt9611_hdmi_hw_params(struct device *dev, void *data,
+ struct hdmi_codec_daifmt *fmt,
+ struct hdmi_codec_params *hparms)
+{
+ struct lt9611 *lt9611 = data;
+
+ if (hparms->sample_rate == 48000)
+ regmap_write(lt9611->regmap, 0x840f, 0x2b);
+ else if (hparms->sample_rate == 96000)
+ regmap_write(lt9611->regmap, 0x840f, 0xab);
+ else
+ return -EINVAL;
+
+ regmap_write(lt9611->regmap, 0x8435, 0x00);
+ regmap_write(lt9611->regmap, 0x8436, 0x18);
+ regmap_write(lt9611->regmap, 0x8437, 0x00);
+
+ return 0;
+}
+
+static int lt9611_audio_startup(struct device *dev, void *data)
+{
+ struct lt9611 *lt9611 = data;
+
+ regmap_write(lt9611->regmap, 0x82d6, 0x8c);
+ regmap_write(lt9611->regmap, 0x82d7, 0x04);
+
+ regmap_write(lt9611->regmap, 0x8406, 0x08);
+ regmap_write(lt9611->regmap, 0x8407, 0x10);
+
+ regmap_write(lt9611->regmap, 0x8434, 0xd5);
+
+ return 0;
+}
+
+static void lt9611_audio_shutdown(struct device *dev, void *data)
+{
+ struct lt9611 *lt9611 = data;
+
+ regmap_write(lt9611->regmap, 0x8406, 0x00);
+ regmap_write(lt9611->regmap, 0x8407, 0x00);
+}
+
+static int lt9611_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
+ struct device_node *endpoint)
+{
+ struct of_endpoint of_ep;
+ int ret;
+
+ ret = of_graph_parse_endpoint(endpoint, &of_ep);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * HDMI sound should be located as reg = <2>
+ * Then, it is sound port 0
+ */
+ if (of_ep.port == 2)
+ return 0;
+
+ return -EINVAL;
+}
+
+static const struct hdmi_codec_ops lt9611_codec_ops = {
+ .hw_params = lt9611_hdmi_hw_params,
+ .audio_shutdown = lt9611_audio_shutdown,
+ .audio_startup = lt9611_audio_startup,
+ .get_dai_id = lt9611_hdmi_i2s_get_dai_id,
+};
+
+static struct hdmi_codec_pdata codec_data = {
+ .ops = &lt9611_codec_ops,
+ .max_i2s_channels = 8,
+ .i2s = 1,
+};
+
+static int lt9611_audio_init(struct device *dev, struct lt9611 *lt9611)
+{
+ codec_data.data = lt9611;
+ lt9611->audio_pdev =
+ platform_device_register_data(dev, HDMI_CODEC_DRV_NAME,
+ PLATFORM_DEVID_AUTO,
+ &codec_data, sizeof(codec_data));
+
+ return PTR_ERR_OR_ZERO(lt9611->audio_pdev);
+}
+
+static void lt9611_audio_exit(struct lt9611 *lt9611)
+{
+ if (lt9611->audio_pdev) {
+ platform_device_unregister(lt9611->audio_pdev);
+ lt9611->audio_pdev = NULL;
+ }
+}
+
+static int lt9611_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct lt9611 *lt9611;
+ struct device *dev = &client->dev;
+ int ret;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(dev, "device doesn't support I2C\n");
+ return -ENODEV;
+ }
+
+ lt9611 = devm_kzalloc(dev, sizeof(*lt9611), GFP_KERNEL);
+ if (!lt9611)
+ return -ENOMEM;
+
+ lt9611->dev = dev;
+ lt9611->client = client;
+ lt9611->sleep = false;
+
+ lt9611->regmap = devm_regmap_init_i2c(client, &lt9611_regmap_config);
+ if (IS_ERR(lt9611->regmap)) {
+ dev_err(lt9611->dev, "regmap i2c init failed\n");
+ return PTR_ERR(lt9611->regmap);
+ }
+
+ ret = lt9611_parse_dt(dev, lt9611);
+ if (ret) {
+ dev_err(dev, "failed to parse device tree\n");
+ return ret;
+ }
+
+ ret = lt9611_gpio_init(lt9611);
+ if (ret < 0)
+ goto err_of_put;
+
+ ret = lt9611_regulator_init(lt9611);
+ if (ret < 0)
+ goto err_of_put;
+
+ lt9611_assert_5v(lt9611);
+
+ ret = lt9611_regulator_enable(lt9611);
+ if (ret)
+ goto err_of_put;
+
+ lt9611_reset(lt9611);
+
+ ret = lt9611_read_device_rev(lt9611);
+ if (ret) {
+ dev_err(dev, "failed to read chip rev\n");
+ goto err_disable_regulators;
+ }
+
+ ret = devm_request_threaded_irq(dev, client->irq, NULL,
+ lt9611_irq_thread_handler,
+ IRQF_ONESHOT, "lt9611", lt9611);
+ if (ret) {
+ dev_err(dev, "failed to request irq\n");
+ goto err_disable_regulators;
+ }
+
+ i2c_set_clientdata(client, lt9611);
+
+ lt9611->bridge.funcs = &lt9611_bridge_funcs;
+ lt9611->bridge.of_node = client->dev.of_node;
+ lt9611->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
+ DRM_BRIDGE_OP_HPD | DRM_BRIDGE_OP_MODES;
+ lt9611->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
+
+ drm_bridge_add(&lt9611->bridge);
+
+ /* Attach primary DSI */
+ lt9611->dsi0 = lt9611_attach_dsi(lt9611, lt9611->dsi0_node);
+ if (IS_ERR(lt9611->dsi0)) {
+ ret = PTR_ERR(lt9611->dsi0);
+ goto err_remove_bridge;
+ }
+
+ /* Attach secondary DSI, if specified */
+ if (lt9611->dsi1_node) {
+ lt9611->dsi1 = lt9611_attach_dsi(lt9611, lt9611->dsi1_node);
+ if (IS_ERR(lt9611->dsi1)) {
+ ret = PTR_ERR(lt9611->dsi1);
+ goto err_remove_bridge;
+ }
+ }
+
+ lt9611_enable_hpd_interrupts(lt9611);
+
+ ret = lt9611_audio_init(dev, lt9611);
+ if (ret)
+ goto err_remove_bridge;
+
+ return 0;
+
+err_remove_bridge:
+ drm_bridge_remove(&lt9611->bridge);
+
+err_disable_regulators:
+ regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies);
+
+err_of_put:
+ of_node_put(lt9611->dsi1_node);
+ of_node_put(lt9611->dsi0_node);
+
+ return ret;
+}
+
+static void lt9611_remove(struct i2c_client *client)
+{
+ struct lt9611 *lt9611 = i2c_get_clientdata(client);
+
+ disable_irq(client->irq);
+ lt9611_audio_exit(lt9611);
+ drm_bridge_remove(&lt9611->bridge);
+
+ regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies);
+
+ of_node_put(lt9611->dsi1_node);
+ of_node_put(lt9611->dsi0_node);
+}
+
+static struct i2c_device_id lt9611_id[] = {
+ { "lontium,lt9611", 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, lt9611_id);
+
+static const struct of_device_id lt9611_match_table[] = {
+ { .compatible = "lontium,lt9611" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, lt9611_match_table);
+
+static struct i2c_driver lt9611_driver = {
+ .driver = {
+ .name = "lt9611",
+ .of_match_table = lt9611_match_table,
+ },
+ .probe = lt9611_probe,
+ .remove = lt9611_remove,
+ .id_table = lt9611_id,
+};
+module_i2c_driver(lt9611_driver);
+
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
new file mode 100644
index 000000000..818848b2c
--- /dev/null
+++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
@@ -0,0 +1,1024 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2019-2020. Linaro Limited.
+ */
+
+#include <linux/firmware.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/wait.h>
+#include <linux/workqueue.h>
+
+#include <sound/hdmi-codec.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#define EDID_BLOCK_SIZE 128
+#define EDID_NUM_BLOCKS 2
+
+struct lt9611uxc {
+ struct device *dev;
+ struct drm_bridge bridge;
+ struct drm_connector connector;
+
+ struct regmap *regmap;
+ /* Protects all accesses to registers by stopping the on-chip MCU */
+ struct mutex ocm_lock;
+
+ struct wait_queue_head wq;
+ struct work_struct work;
+
+ struct device_node *dsi0_node;
+ struct device_node *dsi1_node;
+ struct mipi_dsi_device *dsi0;
+ struct mipi_dsi_device *dsi1;
+ struct platform_device *audio_pdev;
+
+ struct gpio_desc *reset_gpio;
+ struct gpio_desc *enable_gpio;
+
+ struct regulator_bulk_data supplies[2];
+
+ struct i2c_client *client;
+
+ bool hpd_supported;
+ bool edid_read;
+ /* can be accessed from different threads, so protect this with ocm_lock */
+ bool hdmi_connected;
+ uint8_t fw_version;
+};
+
+#define LT9611_PAGE_CONTROL 0xff
+
+static const struct regmap_range_cfg lt9611uxc_ranges[] = {
+ {
+ .name = "register_range",
+ .range_min = 0,
+ .range_max = 0xd0ff,
+ .selector_reg = LT9611_PAGE_CONTROL,
+ .selector_mask = 0xff,
+ .selector_shift = 0,
+ .window_start = 0,
+ .window_len = 0x100,
+ },
+};
+
+static const struct regmap_config lt9611uxc_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0xffff,
+ .ranges = lt9611uxc_ranges,
+ .num_ranges = ARRAY_SIZE(lt9611uxc_ranges),
+};
+
+struct lt9611uxc_mode {
+ u16 hdisplay;
+ u16 vdisplay;
+ u8 vrefresh;
+};
+
+/*
+ * This chip supports only a fixed set of modes.
+ * Enumerate them here to check whether the mode is supported.
+ */
+static struct lt9611uxc_mode lt9611uxc_modes[] = {
+ { 1920, 1080, 60 },
+ { 1920, 1080, 30 },
+ { 1920, 1080, 25 },
+ { 1366, 768, 60 },
+ { 1360, 768, 60 },
+ { 1280, 1024, 60 },
+ { 1280, 800, 60 },
+ { 1280, 720, 60 },
+ { 1280, 720, 50 },
+ { 1280, 720, 30 },
+ { 1152, 864, 60 },
+ { 1024, 768, 60 },
+ { 800, 600, 60 },
+ { 720, 576, 50 },
+ { 720, 480, 60 },
+ { 640, 480, 60 },
+};
+
+static struct lt9611uxc *bridge_to_lt9611uxc(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct lt9611uxc, bridge);
+}
+
+static struct lt9611uxc *connector_to_lt9611uxc(struct drm_connector *connector)
+{
+ return container_of(connector, struct lt9611uxc, connector);
+}
+
+static void lt9611uxc_lock(struct lt9611uxc *lt9611uxc)
+{
+ mutex_lock(&lt9611uxc->ocm_lock);
+ regmap_write(lt9611uxc->regmap, 0x80ee, 0x01);
+}
+
+static void lt9611uxc_unlock(struct lt9611uxc *lt9611uxc)
+{
+ regmap_write(lt9611uxc->regmap, 0x80ee, 0x00);
+ msleep(50);
+ mutex_unlock(&lt9611uxc->ocm_lock);
+}
+
+static irqreturn_t lt9611uxc_irq_thread_handler(int irq, void *dev_id)
+{
+ struct lt9611uxc *lt9611uxc = dev_id;
+ unsigned int irq_status = 0;
+ unsigned int hpd_status = 0;
+
+ lt9611uxc_lock(lt9611uxc);
+
+ regmap_read(lt9611uxc->regmap, 0xb022, &irq_status);
+ regmap_read(lt9611uxc->regmap, 0xb023, &hpd_status);
+ if (irq_status)
+ regmap_write(lt9611uxc->regmap, 0xb022, 0);
+
+ if (irq_status & BIT(0)) {
+ lt9611uxc->edid_read = !!(hpd_status & BIT(0));
+ wake_up_all(&lt9611uxc->wq);
+ }
+
+ if (irq_status & BIT(1)) {
+ lt9611uxc->hdmi_connected = hpd_status & BIT(1);
+ schedule_work(&lt9611uxc->work);
+ }
+
+ lt9611uxc_unlock(lt9611uxc);
+
+ return IRQ_HANDLED;
+}
+
+static void lt9611uxc_hpd_work(struct work_struct *work)
+{
+ struct lt9611uxc *lt9611uxc = container_of(work, struct lt9611uxc, work);
+ bool connected;
+
+ if (lt9611uxc->connector.dev) {
+ if (lt9611uxc->connector.dev->mode_config.funcs)
+ drm_kms_helper_hotplug_event(lt9611uxc->connector.dev);
+ } else {
+
+ mutex_lock(&lt9611uxc->ocm_lock);
+ connected = lt9611uxc->hdmi_connected;
+ mutex_unlock(&lt9611uxc->ocm_lock);
+
+ drm_bridge_hpd_notify(&lt9611uxc->bridge,
+ connected ?
+ connector_status_connected :
+ connector_status_disconnected);
+ }
+}
+
+static void lt9611uxc_reset(struct lt9611uxc *lt9611uxc)
+{
+ gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1);
+ msleep(20);
+
+ gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 0);
+ msleep(20);
+
+ gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1);
+ msleep(300);
+}
+
+static void lt9611uxc_assert_5v(struct lt9611uxc *lt9611uxc)
+{
+ if (!lt9611uxc->enable_gpio)
+ return;
+
+ gpiod_set_value_cansleep(lt9611uxc->enable_gpio, 1);
+ msleep(20);
+}
+
+static int lt9611uxc_regulator_init(struct lt9611uxc *lt9611uxc)
+{
+ int ret;
+
+ lt9611uxc->supplies[0].supply = "vdd";
+ lt9611uxc->supplies[1].supply = "vcc";
+
+ ret = devm_regulator_bulk_get(lt9611uxc->dev, 2, lt9611uxc->supplies);
+ if (ret < 0)
+ return ret;
+
+ return regulator_set_load(lt9611uxc->supplies[0].consumer, 200000);
+}
+
+static int lt9611uxc_regulator_enable(struct lt9611uxc *lt9611uxc)
+{
+ int ret;
+
+ ret = regulator_enable(lt9611uxc->supplies[0].consumer);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(1000, 10000); /* 50000 according to dtsi */
+
+ ret = regulator_enable(lt9611uxc->supplies[1].consumer);
+ if (ret < 0) {
+ regulator_disable(lt9611uxc->supplies[0].consumer);
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct lt9611uxc_mode *lt9611uxc_find_mode(const struct drm_display_mode *mode)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(lt9611uxc_modes); i++) {
+ if (lt9611uxc_modes[i].hdisplay == mode->hdisplay &&
+ lt9611uxc_modes[i].vdisplay == mode->vdisplay &&
+ lt9611uxc_modes[i].vrefresh == drm_mode_vrefresh(mode)) {
+ return &lt9611uxc_modes[i];
+ }
+ }
+
+ return NULL;
+}
+
+static struct mipi_dsi_device *lt9611uxc_attach_dsi(struct lt9611uxc *lt9611uxc,
+ struct device_node *dsi_node)
+{
+ const struct mipi_dsi_device_info info = { "lt9611uxc", 0, NULL };
+ struct mipi_dsi_device *dsi;
+ struct mipi_dsi_host *host;
+ struct device *dev = lt9611uxc->dev;
+ int ret;
+
+ host = of_find_mipi_dsi_host_by_node(dsi_node);
+ if (!host) {
+ dev_err(dev, "failed to find dsi host\n");
+ return ERR_PTR(-EPROBE_DEFER);
+ }
+
+ dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
+ if (IS_ERR(dsi)) {
+ dev_err(dev, "failed to create dsi device\n");
+ return dsi;
+ }
+
+ dsi->lanes = 4;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
+ MIPI_DSI_MODE_VIDEO_HSE;
+
+ ret = devm_mipi_dsi_attach(dev, dsi);
+ if (ret < 0) {
+ dev_err(dev, "failed to attach dsi to host\n");
+ return ERR_PTR(ret);
+ }
+
+ return dsi;
+}
+
+static int lt9611uxc_connector_get_modes(struct drm_connector *connector)
+{
+ struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector);
+ unsigned int count;
+ struct edid *edid;
+
+ edid = lt9611uxc->bridge.funcs->get_edid(&lt9611uxc->bridge, connector);
+ drm_connector_update_edid_property(connector, edid);
+ count = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+
+ return count;
+}
+
+static enum drm_connector_status lt9611uxc_connector_detect(struct drm_connector *connector,
+ bool force)
+{
+ struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector);
+
+ return lt9611uxc->bridge.funcs->detect(&lt9611uxc->bridge);
+}
+
+static enum drm_mode_status lt9611uxc_connector_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ struct lt9611uxc_mode *lt9611uxc_mode = lt9611uxc_find_mode(mode);
+
+ return lt9611uxc_mode ? MODE_OK : MODE_BAD;
+}
+
+static const struct drm_connector_helper_funcs lt9611uxc_bridge_connector_helper_funcs = {
+ .get_modes = lt9611uxc_connector_get_modes,
+ .mode_valid = lt9611uxc_connector_mode_valid,
+};
+
+static const struct drm_connector_funcs lt9611uxc_bridge_connector_funcs = {
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .detect = lt9611uxc_connector_detect,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int lt9611uxc_connector_init(struct drm_bridge *bridge, struct lt9611uxc *lt9611uxc)
+{
+ int ret;
+
+ if (!bridge->encoder) {
+ DRM_ERROR("Parent encoder object not found");
+ return -ENODEV;
+ }
+
+ lt9611uxc->connector.polled = DRM_CONNECTOR_POLL_HPD;
+
+ drm_connector_helper_add(&lt9611uxc->connector,
+ &lt9611uxc_bridge_connector_helper_funcs);
+ ret = drm_connector_init(bridge->dev, &lt9611uxc->connector,
+ &lt9611uxc_bridge_connector_funcs,
+ DRM_MODE_CONNECTOR_HDMIA);
+ if (ret) {
+ DRM_ERROR("Failed to initialize connector with drm\n");
+ return ret;
+ }
+
+ return drm_connector_attach_encoder(&lt9611uxc->connector, bridge->encoder);
+}
+
+static int lt9611uxc_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
+ int ret;
+
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+ ret = lt9611uxc_connector_init(bridge, lt9611uxc);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static enum drm_mode_status
+lt9611uxc_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct lt9611uxc_mode *lt9611uxc_mode;
+
+ lt9611uxc_mode = lt9611uxc_find_mode(mode);
+
+ return lt9611uxc_mode ? MODE_OK : MODE_BAD;
+}
+
+static void lt9611uxc_video_setup(struct lt9611uxc *lt9611uxc,
+ const struct drm_display_mode *mode)
+{
+ u32 h_total, hactive, hsync_len, hfront_porch;
+ u32 v_total, vactive, vsync_len, vfront_porch;
+
+ h_total = mode->htotal;
+ v_total = mode->vtotal;
+
+ hactive = mode->hdisplay;
+ hsync_len = mode->hsync_end - mode->hsync_start;
+ hfront_porch = mode->hsync_start - mode->hdisplay;
+
+ vactive = mode->vdisplay;
+ vsync_len = mode->vsync_end - mode->vsync_start;
+ vfront_porch = mode->vsync_start - mode->vdisplay;
+
+ regmap_write(lt9611uxc->regmap, 0xd00d, (u8)(v_total / 256));
+ regmap_write(lt9611uxc->regmap, 0xd00e, (u8)(v_total % 256));
+
+ regmap_write(lt9611uxc->regmap, 0xd00f, (u8)(vactive / 256));
+ regmap_write(lt9611uxc->regmap, 0xd010, (u8)(vactive % 256));
+
+ regmap_write(lt9611uxc->regmap, 0xd011, (u8)(h_total / 256));
+ regmap_write(lt9611uxc->regmap, 0xd012, (u8)(h_total % 256));
+
+ regmap_write(lt9611uxc->regmap, 0xd013, (u8)(hactive / 256));
+ regmap_write(lt9611uxc->regmap, 0xd014, (u8)(hactive % 256));
+
+ regmap_write(lt9611uxc->regmap, 0xd015, (u8)(vsync_len % 256));
+
+ regmap_update_bits(lt9611uxc->regmap, 0xd016, 0xf, (u8)(hsync_len / 256));
+ regmap_write(lt9611uxc->regmap, 0xd017, (u8)(hsync_len % 256));
+
+ regmap_update_bits(lt9611uxc->regmap, 0xd018, 0xf, (u8)(vfront_porch / 256));
+ regmap_write(lt9611uxc->regmap, 0xd019, (u8)(vfront_porch % 256));
+
+ regmap_update_bits(lt9611uxc->regmap, 0xd01a, 0xf, (u8)(hfront_porch / 256));
+ regmap_write(lt9611uxc->regmap, 0xd01b, (u8)(hfront_porch % 256));
+}
+
+static void lt9611uxc_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adj_mode)
+{
+ struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
+
+ lt9611uxc_lock(lt9611uxc);
+ lt9611uxc_video_setup(lt9611uxc, mode);
+ lt9611uxc_unlock(lt9611uxc);
+}
+
+static enum drm_connector_status lt9611uxc_bridge_detect(struct drm_bridge *bridge)
+{
+ struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
+ unsigned int reg_val = 0;
+ int ret;
+ bool connected = true;
+
+ lt9611uxc_lock(lt9611uxc);
+
+ if (lt9611uxc->hpd_supported) {
+ ret = regmap_read(lt9611uxc->regmap, 0xb023, &reg_val);
+
+ if (ret)
+ dev_err(lt9611uxc->dev, "failed to read hpd status: %d\n", ret);
+ else
+ connected = reg_val & BIT(1);
+ }
+ lt9611uxc->hdmi_connected = connected;
+
+ lt9611uxc_unlock(lt9611uxc);
+
+ return connected ? connector_status_connected :
+ connector_status_disconnected;
+}
+
+static int lt9611uxc_wait_for_edid(struct lt9611uxc *lt9611uxc)
+{
+ return wait_event_interruptible_timeout(lt9611uxc->wq, lt9611uxc->edid_read,
+ msecs_to_jiffies(500));
+}
+
+static int lt9611uxc_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len)
+{
+ struct lt9611uxc *lt9611uxc = data;
+ int ret;
+
+ if (len > EDID_BLOCK_SIZE)
+ return -EINVAL;
+
+ if (block >= EDID_NUM_BLOCKS)
+ return -EINVAL;
+
+ lt9611uxc_lock(lt9611uxc);
+
+ regmap_write(lt9611uxc->regmap, 0xb00b, 0x10);
+
+ regmap_write(lt9611uxc->regmap, 0xb00a, block * EDID_BLOCK_SIZE);
+
+ ret = regmap_noinc_read(lt9611uxc->regmap, 0xb0b0, buf, len);
+ if (ret)
+ dev_err(lt9611uxc->dev, "edid read failed: %d\n", ret);
+
+ lt9611uxc_unlock(lt9611uxc);
+
+ return 0;
+};
+
+static struct edid *lt9611uxc_bridge_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
+ int ret;
+
+ ret = lt9611uxc_wait_for_edid(lt9611uxc);
+ if (ret < 0) {
+ dev_err(lt9611uxc->dev, "wait for EDID failed: %d\n", ret);
+ return NULL;
+ } else if (ret == 0) {
+ dev_err(lt9611uxc->dev, "wait for EDID timeout\n");
+ return NULL;
+ }
+
+ return drm_do_get_edid(connector, lt9611uxc_get_edid_block, lt9611uxc);
+}
+
+static const struct drm_bridge_funcs lt9611uxc_bridge_funcs = {
+ .attach = lt9611uxc_bridge_attach,
+ .mode_valid = lt9611uxc_bridge_mode_valid,
+ .mode_set = lt9611uxc_bridge_mode_set,
+ .detect = lt9611uxc_bridge_detect,
+ .get_edid = lt9611uxc_bridge_get_edid,
+};
+
+static int lt9611uxc_parse_dt(struct device *dev,
+ struct lt9611uxc *lt9611uxc)
+{
+ lt9611uxc->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1);
+ if (!lt9611uxc->dsi0_node) {
+ dev_err(lt9611uxc->dev, "failed to get remote node for primary dsi\n");
+ return -ENODEV;
+ }
+
+ lt9611uxc->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1);
+
+ return 0;
+}
+
+static int lt9611uxc_gpio_init(struct lt9611uxc *lt9611uxc)
+{
+ struct device *dev = lt9611uxc->dev;
+
+ lt9611uxc->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(lt9611uxc->reset_gpio)) {
+ dev_err(dev, "failed to acquire reset gpio\n");
+ return PTR_ERR(lt9611uxc->reset_gpio);
+ }
+
+ lt9611uxc->enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(lt9611uxc->enable_gpio)) {
+ dev_err(dev, "failed to acquire enable gpio\n");
+ return PTR_ERR(lt9611uxc->enable_gpio);
+ }
+
+ return 0;
+}
+
+static int lt9611uxc_read_device_rev(struct lt9611uxc *lt9611uxc)
+{
+ unsigned int rev0, rev1, rev2;
+ int ret;
+
+ lt9611uxc_lock(lt9611uxc);
+
+ ret = regmap_read(lt9611uxc->regmap, 0x8100, &rev0);
+ ret |= regmap_read(lt9611uxc->regmap, 0x8101, &rev1);
+ ret |= regmap_read(lt9611uxc->regmap, 0x8102, &rev2);
+ if (ret)
+ dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret);
+ else
+ dev_info(lt9611uxc->dev, "LT9611 revision: 0x%02x.%02x.%02x\n", rev0, rev1, rev2);
+
+ lt9611uxc_unlock(lt9611uxc);
+
+ return ret;
+}
+
+static int lt9611uxc_read_version(struct lt9611uxc *lt9611uxc)
+{
+ unsigned int rev;
+ int ret;
+
+ lt9611uxc_lock(lt9611uxc);
+
+ ret = regmap_read(lt9611uxc->regmap, 0xb021, &rev);
+ if (ret)
+ dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret);
+ else
+ dev_info(lt9611uxc->dev, "LT9611 version: 0x%02x\n", rev);
+
+ lt9611uxc_unlock(lt9611uxc);
+
+ return ret < 0 ? ret : rev;
+}
+
+static int lt9611uxc_hdmi_hw_params(struct device *dev, void *data,
+ struct hdmi_codec_daifmt *fmt,
+ struct hdmi_codec_params *hparms)
+{
+ /*
+ * LT9611UXC will automatically detect rate and sample size, so no need
+ * to setup anything here.
+ */
+ return 0;
+}
+
+static void lt9611uxc_audio_shutdown(struct device *dev, void *data)
+{
+}
+
+static int lt9611uxc_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
+ struct device_node *endpoint)
+{
+ struct of_endpoint of_ep;
+ int ret;
+
+ ret = of_graph_parse_endpoint(endpoint, &of_ep);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * HDMI sound should be located as reg = <2>
+ * Then, it is sound port 0
+ */
+ if (of_ep.port == 2)
+ return 0;
+
+ return -EINVAL;
+}
+
+static const struct hdmi_codec_ops lt9611uxc_codec_ops = {
+ .hw_params = lt9611uxc_hdmi_hw_params,
+ .audio_shutdown = lt9611uxc_audio_shutdown,
+ .get_dai_id = lt9611uxc_hdmi_i2s_get_dai_id,
+};
+
+static int lt9611uxc_audio_init(struct device *dev, struct lt9611uxc *lt9611uxc)
+{
+ struct hdmi_codec_pdata codec_data = {
+ .ops = &lt9611uxc_codec_ops,
+ .max_i2s_channels = 2,
+ .i2s = 1,
+ .data = lt9611uxc,
+ };
+
+ lt9611uxc->audio_pdev =
+ platform_device_register_data(dev, HDMI_CODEC_DRV_NAME,
+ PLATFORM_DEVID_AUTO,
+ &codec_data, sizeof(codec_data));
+
+ return PTR_ERR_OR_ZERO(lt9611uxc->audio_pdev);
+}
+
+static void lt9611uxc_audio_exit(struct lt9611uxc *lt9611uxc)
+{
+ if (lt9611uxc->audio_pdev) {
+ platform_device_unregister(lt9611uxc->audio_pdev);
+ lt9611uxc->audio_pdev = NULL;
+ }
+}
+
+#define LT9611UXC_FW_PAGE_SIZE 32
+static void lt9611uxc_firmware_write_page(struct lt9611uxc *lt9611uxc, u16 addr, const u8 *buf)
+{
+ struct reg_sequence seq_write_prepare[] = {
+ REG_SEQ0(0x805a, 0x04),
+ REG_SEQ0(0x805a, 0x00),
+
+ REG_SEQ0(0x805e, 0xdf),
+ REG_SEQ0(0x805a, 0x20),
+ REG_SEQ0(0x805a, 0x00),
+ REG_SEQ0(0x8058, 0x21),
+ };
+
+ struct reg_sequence seq_write_addr[] = {
+ REG_SEQ0(0x805b, (addr >> 16) & 0xff),
+ REG_SEQ0(0x805c, (addr >> 8) & 0xff),
+ REG_SEQ0(0x805d, addr & 0xff),
+ REG_SEQ0(0x805a, 0x10),
+ REG_SEQ0(0x805a, 0x00),
+ };
+
+ regmap_write(lt9611uxc->regmap, 0x8108, 0xbf);
+ msleep(20);
+ regmap_write(lt9611uxc->regmap, 0x8108, 0xff);
+ msleep(20);
+ regmap_multi_reg_write(lt9611uxc->regmap, seq_write_prepare, ARRAY_SIZE(seq_write_prepare));
+ regmap_noinc_write(lt9611uxc->regmap, 0x8059, buf, LT9611UXC_FW_PAGE_SIZE);
+ regmap_multi_reg_write(lt9611uxc->regmap, seq_write_addr, ARRAY_SIZE(seq_write_addr));
+ msleep(20);
+}
+
+static void lt9611uxc_firmware_read_page(struct lt9611uxc *lt9611uxc, u16 addr, char *buf)
+{
+ struct reg_sequence seq_read_page[] = {
+ REG_SEQ0(0x805a, 0xa0),
+ REG_SEQ0(0x805a, 0x80),
+ REG_SEQ0(0x805b, (addr >> 16) & 0xff),
+ REG_SEQ0(0x805c, (addr >> 8) & 0xff),
+ REG_SEQ0(0x805d, addr & 0xff),
+ REG_SEQ0(0x805a, 0x90),
+ REG_SEQ0(0x805a, 0x80),
+ REG_SEQ0(0x8058, 0x21),
+ };
+
+ regmap_multi_reg_write(lt9611uxc->regmap, seq_read_page, ARRAY_SIZE(seq_read_page));
+ regmap_noinc_read(lt9611uxc->regmap, 0x805f, buf, LT9611UXC_FW_PAGE_SIZE);
+}
+
+static char *lt9611uxc_firmware_read(struct lt9611uxc *lt9611uxc, size_t size)
+{
+ struct reg_sequence seq_read_setup[] = {
+ REG_SEQ0(0x805a, 0x84),
+ REG_SEQ0(0x805a, 0x80),
+ };
+
+ char *readbuf;
+ u16 offset;
+
+ readbuf = kzalloc(ALIGN(size, 32), GFP_KERNEL);
+ if (!readbuf)
+ return NULL;
+
+ regmap_multi_reg_write(lt9611uxc->regmap, seq_read_setup, ARRAY_SIZE(seq_read_setup));
+
+ for (offset = 0;
+ offset < size;
+ offset += LT9611UXC_FW_PAGE_SIZE)
+ lt9611uxc_firmware_read_page(lt9611uxc, offset, &readbuf[offset]);
+
+ return readbuf;
+}
+
+static int lt9611uxc_firmware_update(struct lt9611uxc *lt9611uxc)
+{
+ int ret;
+ u16 offset;
+ size_t remain;
+ char *readbuf;
+ const struct firmware *fw;
+
+ struct reg_sequence seq_setup[] = {
+ REG_SEQ0(0x805e, 0xdf),
+ REG_SEQ0(0x8058, 0x00),
+ REG_SEQ0(0x8059, 0x50),
+ REG_SEQ0(0x805a, 0x10),
+ REG_SEQ0(0x805a, 0x00),
+ };
+
+
+ struct reg_sequence seq_block_erase[] = {
+ REG_SEQ0(0x805a, 0x04),
+ REG_SEQ0(0x805a, 0x00),
+ REG_SEQ0(0x805b, 0x00),
+ REG_SEQ0(0x805c, 0x00),
+ REG_SEQ0(0x805d, 0x00),
+ REG_SEQ0(0x805a, 0x01),
+ REG_SEQ0(0x805a, 0x00),
+ };
+
+ ret = request_firmware(&fw, "lt9611uxc_fw.bin", lt9611uxc->dev);
+ if (ret < 0)
+ return ret;
+
+ dev_info(lt9611uxc->dev, "Updating firmware\n");
+ lt9611uxc_lock(lt9611uxc);
+
+ regmap_multi_reg_write(lt9611uxc->regmap, seq_setup, ARRAY_SIZE(seq_setup));
+
+ /*
+ * Need erase block 2 timess here. Sometimes, block erase can fail.
+ * This is a workaroud.
+ */
+ regmap_multi_reg_write(lt9611uxc->regmap, seq_block_erase, ARRAY_SIZE(seq_block_erase));
+ msleep(3000);
+ regmap_multi_reg_write(lt9611uxc->regmap, seq_block_erase, ARRAY_SIZE(seq_block_erase));
+ msleep(3000);
+
+ for (offset = 0, remain = fw->size;
+ remain >= LT9611UXC_FW_PAGE_SIZE;
+ offset += LT9611UXC_FW_PAGE_SIZE, remain -= LT9611UXC_FW_PAGE_SIZE)
+ lt9611uxc_firmware_write_page(lt9611uxc, offset, fw->data + offset);
+
+ if (remain > 0) {
+ char buf[LT9611UXC_FW_PAGE_SIZE];
+
+ memset(buf, 0xff, LT9611UXC_FW_PAGE_SIZE);
+ memcpy(buf, fw->data + offset, remain);
+ lt9611uxc_firmware_write_page(lt9611uxc, offset, buf);
+ }
+ msleep(20);
+
+ readbuf = lt9611uxc_firmware_read(lt9611uxc, fw->size);
+ if (!readbuf) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ if (!memcmp(readbuf, fw->data, fw->size)) {
+ dev_err(lt9611uxc->dev, "Firmware update failed\n");
+ print_hex_dump(KERN_ERR, "fw: ", DUMP_PREFIX_OFFSET, 16, 1, readbuf, fw->size, false);
+ ret = -EINVAL;
+ } else {
+ dev_info(lt9611uxc->dev, "Firmware updates successfully\n");
+ ret = 0;
+ }
+ kfree(readbuf);
+
+out:
+ lt9611uxc_unlock(lt9611uxc);
+ lt9611uxc_reset(lt9611uxc);
+ release_firmware(fw);
+
+ return ret;
+}
+
+static ssize_t lt9611uxc_firmware_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len)
+{
+ struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev);
+ int ret;
+
+ ret = lt9611uxc_firmware_update(lt9611uxc);
+ if (ret < 0)
+ return ret;
+ return len;
+}
+
+static ssize_t lt9611uxc_firmware_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%02x\n", lt9611uxc->fw_version);
+}
+
+static DEVICE_ATTR_RW(lt9611uxc_firmware);
+
+static struct attribute *lt9611uxc_attrs[] = {
+ &dev_attr_lt9611uxc_firmware.attr,
+ NULL,
+};
+
+static const struct attribute_group lt9611uxc_attr_group = {
+ .attrs = lt9611uxc_attrs,
+};
+
+static const struct attribute_group *lt9611uxc_attr_groups[] = {
+ &lt9611uxc_attr_group,
+ NULL,
+};
+
+static int lt9611uxc_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct lt9611uxc *lt9611uxc;
+ struct device *dev = &client->dev;
+ int ret;
+ bool fw_updated = false;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(dev, "device doesn't support I2C\n");
+ return -ENODEV;
+ }
+
+ lt9611uxc = devm_kzalloc(dev, sizeof(*lt9611uxc), GFP_KERNEL);
+ if (!lt9611uxc)
+ return -ENOMEM;
+
+ lt9611uxc->dev = dev;
+ lt9611uxc->client = client;
+ mutex_init(&lt9611uxc->ocm_lock);
+
+ lt9611uxc->regmap = devm_regmap_init_i2c(client, &lt9611uxc_regmap_config);
+ if (IS_ERR(lt9611uxc->regmap)) {
+ dev_err(lt9611uxc->dev, "regmap i2c init failed\n");
+ return PTR_ERR(lt9611uxc->regmap);
+ }
+
+ ret = lt9611uxc_parse_dt(dev, lt9611uxc);
+ if (ret) {
+ dev_err(dev, "failed to parse device tree\n");
+ return ret;
+ }
+
+ ret = lt9611uxc_gpio_init(lt9611uxc);
+ if (ret < 0)
+ goto err_of_put;
+
+ ret = lt9611uxc_regulator_init(lt9611uxc);
+ if (ret < 0)
+ goto err_of_put;
+
+ lt9611uxc_assert_5v(lt9611uxc);
+
+ ret = lt9611uxc_regulator_enable(lt9611uxc);
+ if (ret)
+ goto err_of_put;
+
+ lt9611uxc_reset(lt9611uxc);
+
+ ret = lt9611uxc_read_device_rev(lt9611uxc);
+ if (ret) {
+ dev_err(dev, "failed to read chip rev\n");
+ goto err_disable_regulators;
+ }
+
+retry:
+ ret = lt9611uxc_read_version(lt9611uxc);
+ if (ret < 0) {
+ dev_err(dev, "failed to read FW version\n");
+ goto err_disable_regulators;
+ } else if (ret == 0) {
+ if (!fw_updated) {
+ fw_updated = true;
+ dev_err(dev, "FW version 0, enforcing firmware update\n");
+ ret = lt9611uxc_firmware_update(lt9611uxc);
+ if (ret < 0)
+ goto err_disable_regulators;
+ else
+ goto retry;
+ } else {
+ dev_err(dev, "FW version 0, update failed\n");
+ ret = -EOPNOTSUPP;
+ goto err_disable_regulators;
+ }
+ } else if (ret < 0x40) {
+ dev_info(dev, "FW version 0x%x, HPD not supported\n", ret);
+ } else {
+ lt9611uxc->hpd_supported = true;
+ }
+ lt9611uxc->fw_version = ret;
+
+ init_waitqueue_head(&lt9611uxc->wq);
+ INIT_WORK(&lt9611uxc->work, lt9611uxc_hpd_work);
+
+ ret = request_threaded_irq(client->irq, NULL,
+ lt9611uxc_irq_thread_handler,
+ IRQF_ONESHOT, "lt9611uxc", lt9611uxc);
+ if (ret) {
+ dev_err(dev, "failed to request irq\n");
+ goto err_disable_regulators;
+ }
+
+ i2c_set_clientdata(client, lt9611uxc);
+
+ lt9611uxc->bridge.funcs = &lt9611uxc_bridge_funcs;
+ lt9611uxc->bridge.of_node = client->dev.of_node;
+ lt9611uxc->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID;
+ if (lt9611uxc->hpd_supported)
+ lt9611uxc->bridge.ops |= DRM_BRIDGE_OP_HPD;
+ lt9611uxc->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
+
+ drm_bridge_add(&lt9611uxc->bridge);
+
+ /* Attach primary DSI */
+ lt9611uxc->dsi0 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi0_node);
+ if (IS_ERR(lt9611uxc->dsi0)) {
+ ret = PTR_ERR(lt9611uxc->dsi0);
+ goto err_remove_bridge;
+ }
+
+ /* Attach secondary DSI, if specified */
+ if (lt9611uxc->dsi1_node) {
+ lt9611uxc->dsi1 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi1_node);
+ if (IS_ERR(lt9611uxc->dsi1)) {
+ ret = PTR_ERR(lt9611uxc->dsi1);
+ goto err_remove_bridge;
+ }
+ }
+
+ return lt9611uxc_audio_init(dev, lt9611uxc);
+
+err_remove_bridge:
+ free_irq(client->irq, lt9611uxc);
+ cancel_work_sync(&lt9611uxc->work);
+ drm_bridge_remove(&lt9611uxc->bridge);
+
+err_disable_regulators:
+ regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies);
+
+err_of_put:
+ of_node_put(lt9611uxc->dsi1_node);
+ of_node_put(lt9611uxc->dsi0_node);
+
+ return ret;
+}
+
+static void lt9611uxc_remove(struct i2c_client *client)
+{
+ struct lt9611uxc *lt9611uxc = i2c_get_clientdata(client);
+
+ free_irq(client->irq, lt9611uxc);
+ cancel_work_sync(&lt9611uxc->work);
+ lt9611uxc_audio_exit(lt9611uxc);
+ drm_bridge_remove(&lt9611uxc->bridge);
+
+ mutex_destroy(&lt9611uxc->ocm_lock);
+
+ regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies);
+
+ of_node_put(lt9611uxc->dsi1_node);
+ of_node_put(lt9611uxc->dsi0_node);
+}
+
+static struct i2c_device_id lt9611uxc_id[] = {
+ { "lontium,lt9611uxc", 0 },
+ { /* sentinel */ }
+};
+
+static const struct of_device_id lt9611uxc_match_table[] = {
+ { .compatible = "lontium,lt9611uxc" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, lt9611uxc_match_table);
+
+static struct i2c_driver lt9611uxc_driver = {
+ .driver = {
+ .name = "lt9611uxc",
+ .of_match_table = lt9611uxc_match_table,
+ .dev_groups = lt9611uxc_attr_groups,
+ },
+ .probe = lt9611uxc_probe,
+ .remove = lt9611uxc_remove,
+ .id_table = lt9611uxc_id,
+};
+module_i2c_driver(lt9611uxc_driver);
+
+MODULE_AUTHOR("Dmitry Baryshkov <dmitry.baryshkov@linaro.org>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/lvds-codec.c b/drivers/gpu/drm/bridge/lvds-codec.c
new file mode 100644
index 000000000..39e7004de
--- /dev/null
+++ b/drivers/gpu/drm/bridge/lvds-codec.c
@@ -0,0 +1,256 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2019 Renesas Electronics Corporation
+ * Copyright (C) 2016 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+
+struct lvds_codec {
+ struct device *dev;
+ struct drm_bridge bridge;
+ struct drm_bridge *panel_bridge;
+ struct drm_bridge_timings timings;
+ struct regulator *vcc;
+ struct gpio_desc *powerdown_gpio;
+ u32 connector_type;
+ unsigned int bus_format;
+};
+
+static inline struct lvds_codec *to_lvds_codec(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct lvds_codec, bridge);
+}
+
+static int lvds_codec_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct lvds_codec *lvds_codec = to_lvds_codec(bridge);
+
+ return drm_bridge_attach(bridge->encoder, lvds_codec->panel_bridge,
+ bridge, flags);
+}
+
+static void lvds_codec_enable(struct drm_bridge *bridge)
+{
+ struct lvds_codec *lvds_codec = to_lvds_codec(bridge);
+ int ret;
+
+ ret = regulator_enable(lvds_codec->vcc);
+ if (ret) {
+ dev_err(lvds_codec->dev,
+ "Failed to enable regulator \"vcc\": %d\n", ret);
+ return;
+ }
+
+ if (lvds_codec->powerdown_gpio)
+ gpiod_set_value_cansleep(lvds_codec->powerdown_gpio, 0);
+}
+
+static void lvds_codec_disable(struct drm_bridge *bridge)
+{
+ struct lvds_codec *lvds_codec = to_lvds_codec(bridge);
+ int ret;
+
+ if (lvds_codec->powerdown_gpio)
+ gpiod_set_value_cansleep(lvds_codec->powerdown_gpio, 1);
+
+ ret = regulator_disable(lvds_codec->vcc);
+ if (ret)
+ dev_err(lvds_codec->dev,
+ "Failed to disable regulator \"vcc\": %d\n", ret);
+}
+
+static const struct drm_bridge_funcs funcs = {
+ .attach = lvds_codec_attach,
+ .enable = lvds_codec_enable,
+ .disable = lvds_codec_disable,
+};
+
+#define MAX_INPUT_SEL_FORMATS 1
+static u32 *
+lvds_codec_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ struct lvds_codec *lvds_codec = to_lvds_codec(bridge);
+ u32 *input_fmts;
+
+ *num_input_fmts = 0;
+
+ input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
+ GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ input_fmts[0] = lvds_codec->bus_format;
+ *num_input_fmts = MAX_INPUT_SEL_FORMATS;
+
+ return input_fmts;
+}
+
+static const struct drm_bridge_funcs funcs_decoder = {
+ .attach = lvds_codec_attach,
+ .enable = lvds_codec_enable,
+ .disable = lvds_codec_disable,
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .atomic_get_input_bus_fmts = lvds_codec_atomic_get_input_bus_fmts,
+};
+
+static int lvds_codec_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *panel_node;
+ struct device_node *bus_node;
+ struct drm_panel *panel;
+ struct lvds_codec *lvds_codec;
+ u32 val;
+ int ret;
+
+ lvds_codec = devm_kzalloc(dev, sizeof(*lvds_codec), GFP_KERNEL);
+ if (!lvds_codec)
+ return -ENOMEM;
+
+ lvds_codec->dev = &pdev->dev;
+ lvds_codec->connector_type = (uintptr_t)of_device_get_match_data(dev);
+
+ lvds_codec->vcc = devm_regulator_get(lvds_codec->dev, "power");
+ if (IS_ERR(lvds_codec->vcc))
+ return dev_err_probe(dev, PTR_ERR(lvds_codec->vcc),
+ "Unable to get \"vcc\" supply\n");
+
+ lvds_codec->powerdown_gpio = devm_gpiod_get_optional(dev, "powerdown",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(lvds_codec->powerdown_gpio))
+ return dev_err_probe(dev, PTR_ERR(lvds_codec->powerdown_gpio),
+ "powerdown GPIO failure\n");
+
+ /* Locate the panel DT node. */
+ panel_node = of_graph_get_remote_node(dev->of_node, 1, 0);
+ if (!panel_node) {
+ dev_dbg(dev, "panel DT node not found\n");
+ return -ENXIO;
+ }
+
+ panel = of_drm_find_panel(panel_node);
+ of_node_put(panel_node);
+ if (IS_ERR(panel)) {
+ dev_dbg(dev, "panel not found, deferring probe\n");
+ return PTR_ERR(panel);
+ }
+
+ lvds_codec->panel_bridge =
+ devm_drm_panel_bridge_add_typed(dev, panel,
+ lvds_codec->connector_type);
+ if (IS_ERR(lvds_codec->panel_bridge))
+ return PTR_ERR(lvds_codec->panel_bridge);
+
+ lvds_codec->bridge.funcs = &funcs;
+
+ /*
+ * Decoder input LVDS format is a property of the decoder chip or even
+ * its strapping. Handle data-mapping the same way lvds-panel does. In
+ * case data-mapping is not present, do nothing, since there are still
+ * legacy bindings which do not specify this property.
+ */
+ if (lvds_codec->connector_type != DRM_MODE_CONNECTOR_LVDS) {
+ bus_node = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
+ if (!bus_node) {
+ dev_dbg(dev, "bus DT node not found\n");
+ return -ENXIO;
+ }
+
+ ret = drm_of_lvds_get_data_mapping(bus_node);
+ of_node_put(bus_node);
+ if (ret == -ENODEV) {
+ dev_warn(dev, "missing 'data-mapping' DT property\n");
+ } else if (ret < 0) {
+ dev_err(dev, "invalid 'data-mapping' DT property\n");
+ return ret;
+ } else {
+ lvds_codec->bus_format = ret;
+ lvds_codec->bridge.funcs = &funcs_decoder;
+ }
+ }
+
+ /*
+ * Encoder might sample data on different clock edge than the display,
+ * for example OnSemi FIN3385 has a dedicated strapping pin to select
+ * the sampling edge.
+ */
+ if (lvds_codec->connector_type == DRM_MODE_CONNECTOR_LVDS &&
+ !of_property_read_u32(dev->of_node, "pclk-sample", &val)) {
+ lvds_codec->timings.input_bus_flags = val ?
+ DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE :
+ DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE;
+ }
+
+ /*
+ * The panel_bridge bridge is attached to the panel's of_node,
+ * but we need a bridge attached to our of_node for our user
+ * to look up.
+ */
+ lvds_codec->bridge.of_node = dev->of_node;
+ lvds_codec->bridge.timings = &lvds_codec->timings;
+ drm_bridge_add(&lvds_codec->bridge);
+
+ platform_set_drvdata(pdev, lvds_codec);
+
+ return 0;
+}
+
+static int lvds_codec_remove(struct platform_device *pdev)
+{
+ struct lvds_codec *lvds_codec = platform_get_drvdata(pdev);
+
+ drm_bridge_remove(&lvds_codec->bridge);
+
+ return 0;
+}
+
+static const struct of_device_id lvds_codec_match[] = {
+ {
+ .compatible = "lvds-decoder",
+ .data = (void *)DRM_MODE_CONNECTOR_DPI,
+ },
+ {
+ .compatible = "lvds-encoder",
+ .data = (void *)DRM_MODE_CONNECTOR_LVDS,
+ },
+ {
+ .compatible = "thine,thc63lvdm83d",
+ .data = (void *)DRM_MODE_CONNECTOR_LVDS,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, lvds_codec_match);
+
+static struct platform_driver lvds_codec_driver = {
+ .probe = lvds_codec_probe,
+ .remove = lvds_codec_remove,
+ .driver = {
+ .name = "lvds-codec",
+ .of_match_table = lvds_codec_match,
+ },
+};
+module_platform_driver(lvds_codec_driver);
+
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
+MODULE_DESCRIPTION("LVDS encoders and decoders");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c b/drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c
new file mode 100644
index 000000000..cbfa05a67
--- /dev/null
+++ b/drivers/gpu/drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c
@@ -0,0 +1,461 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Driver for MegaChips STDP4028 with GE B850v3 firmware (LVDS-DP)
+ * Driver for MegaChips STDP2690 with GE B850v3 firmware (DP-DP++)
+
+ * Copyright (c) 2017, Collabora Ltd.
+ * Copyright (c) 2017, General Electric Company
+
+
+ * This driver creates a drm_bridge and a drm_connector for the LVDS to DP++
+ * display bridge of the GE B850v3. There are two physical bridges on the video
+ * signal pipeline: a STDP4028(LVDS to DP) and a STDP2690(DP to DP++). The
+ * physical bridges are automatically configured by the input video signal, and
+ * the driver has no access to the video processing pipeline. The driver is
+ * only needed to read EDID from the STDP2690 and to handle HPD events from the
+ * STDP4028. The driver communicates with both bridges over i2c. The video
+ * signal pipeline is as follows:
+ *
+ * Host -> LVDS|--(STDP4028)--|DP -> DP|--(STDP2690)--|DP++ -> Video output
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#define EDID_EXT_BLOCK_CNT 0x7E
+
+#define STDP4028_IRQ_OUT_CONF_REG 0x02
+#define STDP4028_DPTX_IRQ_EN_REG 0x3C
+#define STDP4028_DPTX_IRQ_STS_REG 0x3D
+#define STDP4028_DPTX_STS_REG 0x3E
+
+#define STDP4028_DPTX_DP_IRQ_EN 0x1000
+
+#define STDP4028_DPTX_HOTPLUG_IRQ_EN 0x0400
+#define STDP4028_DPTX_LINK_CH_IRQ_EN 0x2000
+#define STDP4028_DPTX_IRQ_CONFIG \
+ (STDP4028_DPTX_LINK_CH_IRQ_EN | STDP4028_DPTX_HOTPLUG_IRQ_EN)
+
+#define STDP4028_DPTX_HOTPLUG_STS 0x0200
+#define STDP4028_DPTX_LINK_STS 0x1000
+#define STDP4028_CON_STATE_CONNECTED \
+ (STDP4028_DPTX_HOTPLUG_STS | STDP4028_DPTX_LINK_STS)
+
+#define STDP4028_DPTX_HOTPLUG_CH_STS 0x0400
+#define STDP4028_DPTX_LINK_CH_STS 0x2000
+#define STDP4028_DPTX_IRQ_CLEAR \
+ (STDP4028_DPTX_LINK_CH_STS | STDP4028_DPTX_HOTPLUG_CH_STS)
+
+static DEFINE_MUTEX(ge_b850v3_lvds_dev_mutex);
+
+struct ge_b850v3_lvds {
+ struct drm_connector connector;
+ struct drm_bridge bridge;
+ struct i2c_client *stdp4028_i2c;
+ struct i2c_client *stdp2690_i2c;
+};
+
+static struct ge_b850v3_lvds *ge_b850v3_lvds_ptr;
+
+static u8 *stdp2690_get_edid(struct i2c_client *client)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ unsigned char start = 0x00;
+ unsigned int total_size;
+ u8 *block = kmalloc(EDID_LENGTH, GFP_KERNEL);
+
+ struct i2c_msg msgs[] = {
+ {
+ .addr = client->addr,
+ .flags = 0,
+ .len = 1,
+ .buf = &start,
+ }, {
+ .addr = client->addr,
+ .flags = I2C_M_RD,
+ .len = EDID_LENGTH,
+ .buf = block,
+ }
+ };
+
+ if (!block)
+ return NULL;
+
+ if (i2c_transfer(adapter, msgs, 2) != 2) {
+ DRM_ERROR("Unable to read EDID.\n");
+ goto err;
+ }
+
+ if (!drm_edid_block_valid(block, 0, false, NULL)) {
+ DRM_ERROR("Invalid EDID data\n");
+ goto err;
+ }
+
+ total_size = (block[EDID_EXT_BLOCK_CNT] + 1) * EDID_LENGTH;
+ if (total_size > EDID_LENGTH) {
+ kfree(block);
+ block = kmalloc(total_size, GFP_KERNEL);
+ if (!block)
+ return NULL;
+
+ /* Yes, read the entire buffer, and do not skip the first
+ * EDID_LENGTH bytes.
+ */
+ start = 0x00;
+ msgs[1].len = total_size;
+ msgs[1].buf = block;
+
+ if (i2c_transfer(adapter, msgs, 2) != 2) {
+ DRM_ERROR("Unable to read EDID extension blocks.\n");
+ goto err;
+ }
+ if (!drm_edid_block_valid(block, 1, false, NULL)) {
+ DRM_ERROR("Invalid EDID data\n");
+ goto err;
+ }
+ }
+
+ return block;
+
+err:
+ kfree(block);
+ return NULL;
+}
+
+static struct edid *ge_b850v3_lvds_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct i2c_client *client;
+
+ client = ge_b850v3_lvds_ptr->stdp2690_i2c;
+
+ return (struct edid *)stdp2690_get_edid(client);
+}
+
+static int ge_b850v3_lvds_get_modes(struct drm_connector *connector)
+{
+ struct edid *edid;
+ int num_modes;
+
+ edid = ge_b850v3_lvds_get_edid(&ge_b850v3_lvds_ptr->bridge, connector);
+
+ drm_connector_update_edid_property(connector, edid);
+ num_modes = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+
+ return num_modes;
+}
+
+static enum drm_mode_status ge_b850v3_lvds_mode_valid(
+ struct drm_connector *connector, struct drm_display_mode *mode)
+{
+ return MODE_OK;
+}
+
+static const struct
+drm_connector_helper_funcs ge_b850v3_lvds_connector_helper_funcs = {
+ .get_modes = ge_b850v3_lvds_get_modes,
+ .mode_valid = ge_b850v3_lvds_mode_valid,
+};
+
+static enum drm_connector_status ge_b850v3_lvds_bridge_detect(struct drm_bridge *bridge)
+{
+ struct i2c_client *stdp4028_i2c =
+ ge_b850v3_lvds_ptr->stdp4028_i2c;
+ s32 link_state;
+
+ link_state = i2c_smbus_read_word_data(stdp4028_i2c,
+ STDP4028_DPTX_STS_REG);
+
+ if (link_state == STDP4028_CON_STATE_CONNECTED)
+ return connector_status_connected;
+
+ if (link_state == 0)
+ return connector_status_disconnected;
+
+ return connector_status_unknown;
+}
+
+static enum drm_connector_status ge_b850v3_lvds_detect(struct drm_connector *connector,
+ bool force)
+{
+ return ge_b850v3_lvds_bridge_detect(&ge_b850v3_lvds_ptr->bridge);
+}
+
+static const struct drm_connector_funcs ge_b850v3_lvds_connector_funcs = {
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .detect = ge_b850v3_lvds_detect,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int ge_b850v3_lvds_create_connector(struct drm_bridge *bridge)
+{
+ struct drm_connector *connector = &ge_b850v3_lvds_ptr->connector;
+ int ret;
+
+ if (!bridge->encoder) {
+ DRM_ERROR("Parent encoder object not found");
+ return -ENODEV;
+ }
+
+ connector->polled = DRM_CONNECTOR_POLL_HPD;
+
+ drm_connector_helper_add(connector,
+ &ge_b850v3_lvds_connector_helper_funcs);
+
+ ret = drm_connector_init(bridge->dev, connector,
+ &ge_b850v3_lvds_connector_funcs,
+ DRM_MODE_CONNECTOR_DisplayPort);
+ if (ret) {
+ DRM_ERROR("Failed to initialize connector with drm\n");
+ return ret;
+ }
+
+ return drm_connector_attach_encoder(connector, bridge->encoder);
+}
+
+static irqreturn_t ge_b850v3_lvds_irq_handler(int irq, void *dev_id)
+{
+ struct i2c_client *stdp4028_i2c
+ = ge_b850v3_lvds_ptr->stdp4028_i2c;
+
+ i2c_smbus_write_word_data(stdp4028_i2c,
+ STDP4028_DPTX_IRQ_STS_REG,
+ STDP4028_DPTX_IRQ_CLEAR);
+
+ if (ge_b850v3_lvds_ptr->bridge.dev)
+ drm_kms_helper_hotplug_event(ge_b850v3_lvds_ptr->bridge.dev);
+
+ return IRQ_HANDLED;
+}
+
+static int ge_b850v3_lvds_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct i2c_client *stdp4028_i2c
+ = ge_b850v3_lvds_ptr->stdp4028_i2c;
+
+ /* Configures the bridge to re-enable interrupts after each ack. */
+ i2c_smbus_write_word_data(stdp4028_i2c,
+ STDP4028_IRQ_OUT_CONF_REG,
+ STDP4028_DPTX_DP_IRQ_EN);
+
+ /* Enable interrupts */
+ i2c_smbus_write_word_data(stdp4028_i2c,
+ STDP4028_DPTX_IRQ_EN_REG,
+ STDP4028_DPTX_IRQ_CONFIG);
+
+ if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
+ return 0;
+
+ return ge_b850v3_lvds_create_connector(bridge);
+}
+
+static const struct drm_bridge_funcs ge_b850v3_lvds_funcs = {
+ .attach = ge_b850v3_lvds_attach,
+ .detect = ge_b850v3_lvds_bridge_detect,
+ .get_edid = ge_b850v3_lvds_get_edid,
+};
+
+static int ge_b850v3_lvds_init(struct device *dev)
+{
+ mutex_lock(&ge_b850v3_lvds_dev_mutex);
+
+ if (ge_b850v3_lvds_ptr)
+ goto success;
+
+ ge_b850v3_lvds_ptr = devm_kzalloc(dev,
+ sizeof(*ge_b850v3_lvds_ptr),
+ GFP_KERNEL);
+
+ if (!ge_b850v3_lvds_ptr) {
+ mutex_unlock(&ge_b850v3_lvds_dev_mutex);
+ return -ENOMEM;
+ }
+
+success:
+ mutex_unlock(&ge_b850v3_lvds_dev_mutex);
+ return 0;
+}
+
+static void ge_b850v3_lvds_remove(void)
+{
+ mutex_lock(&ge_b850v3_lvds_dev_mutex);
+ /*
+ * This check is to avoid both the drivers
+ * removing the bridge in their remove() function
+ */
+ if (!ge_b850v3_lvds_ptr ||
+ !ge_b850v3_lvds_ptr->stdp2690_i2c ||
+ !ge_b850v3_lvds_ptr->stdp4028_i2c)
+ goto out;
+
+ drm_bridge_remove(&ge_b850v3_lvds_ptr->bridge);
+
+ ge_b850v3_lvds_ptr = NULL;
+out:
+ mutex_unlock(&ge_b850v3_lvds_dev_mutex);
+}
+
+static int ge_b850v3_register(void)
+{
+ struct i2c_client *stdp4028_i2c = ge_b850v3_lvds_ptr->stdp4028_i2c;
+ struct device *dev = &stdp4028_i2c->dev;
+
+ /* drm bridge initialization */
+ ge_b850v3_lvds_ptr->bridge.funcs = &ge_b850v3_lvds_funcs;
+ ge_b850v3_lvds_ptr->bridge.ops = DRM_BRIDGE_OP_DETECT |
+ DRM_BRIDGE_OP_EDID;
+ ge_b850v3_lvds_ptr->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
+ ge_b850v3_lvds_ptr->bridge.of_node = dev->of_node;
+ drm_bridge_add(&ge_b850v3_lvds_ptr->bridge);
+
+ /* Clear pending interrupts since power up. */
+ i2c_smbus_write_word_data(stdp4028_i2c,
+ STDP4028_DPTX_IRQ_STS_REG,
+ STDP4028_DPTX_IRQ_CLEAR);
+
+ if (!stdp4028_i2c->irq)
+ return 0;
+
+ return devm_request_threaded_irq(&stdp4028_i2c->dev,
+ stdp4028_i2c->irq, NULL,
+ ge_b850v3_lvds_irq_handler,
+ IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+ "ge-b850v3-lvds-dp", ge_b850v3_lvds_ptr);
+}
+
+static int stdp4028_ge_b850v3_fw_probe(struct i2c_client *stdp4028_i2c,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &stdp4028_i2c->dev;
+ int ret;
+
+ ret = ge_b850v3_lvds_init(dev);
+
+ if (ret)
+ return ret;
+
+ ge_b850v3_lvds_ptr->stdp4028_i2c = stdp4028_i2c;
+ i2c_set_clientdata(stdp4028_i2c, ge_b850v3_lvds_ptr);
+
+ /* Only register after both bridges are probed */
+ if (!ge_b850v3_lvds_ptr->stdp2690_i2c)
+ return 0;
+
+ return ge_b850v3_register();
+}
+
+static void stdp4028_ge_b850v3_fw_remove(struct i2c_client *stdp4028_i2c)
+{
+ ge_b850v3_lvds_remove();
+}
+
+static const struct i2c_device_id stdp4028_ge_b850v3_fw_i2c_table[] = {
+ {"stdp4028_ge_fw", 0},
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, stdp4028_ge_b850v3_fw_i2c_table);
+
+static const struct of_device_id stdp4028_ge_b850v3_fw_match[] = {
+ { .compatible = "megachips,stdp4028-ge-b850v3-fw" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, stdp4028_ge_b850v3_fw_match);
+
+static struct i2c_driver stdp4028_ge_b850v3_fw_driver = {
+ .id_table = stdp4028_ge_b850v3_fw_i2c_table,
+ .probe = stdp4028_ge_b850v3_fw_probe,
+ .remove = stdp4028_ge_b850v3_fw_remove,
+ .driver = {
+ .name = "stdp4028-ge-b850v3-fw",
+ .of_match_table = stdp4028_ge_b850v3_fw_match,
+ },
+};
+
+static int stdp2690_ge_b850v3_fw_probe(struct i2c_client *stdp2690_i2c,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &stdp2690_i2c->dev;
+ int ret;
+
+ ret = ge_b850v3_lvds_init(dev);
+
+ if (ret)
+ return ret;
+
+ ge_b850v3_lvds_ptr->stdp2690_i2c = stdp2690_i2c;
+ i2c_set_clientdata(stdp2690_i2c, ge_b850v3_lvds_ptr);
+
+ /* Only register after both bridges are probed */
+ if (!ge_b850v3_lvds_ptr->stdp4028_i2c)
+ return 0;
+
+ return ge_b850v3_register();
+}
+
+static void stdp2690_ge_b850v3_fw_remove(struct i2c_client *stdp2690_i2c)
+{
+ ge_b850v3_lvds_remove();
+}
+
+static const struct i2c_device_id stdp2690_ge_b850v3_fw_i2c_table[] = {
+ {"stdp2690_ge_fw", 0},
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, stdp2690_ge_b850v3_fw_i2c_table);
+
+static const struct of_device_id stdp2690_ge_b850v3_fw_match[] = {
+ { .compatible = "megachips,stdp2690-ge-b850v3-fw" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, stdp2690_ge_b850v3_fw_match);
+
+static struct i2c_driver stdp2690_ge_b850v3_fw_driver = {
+ .id_table = stdp2690_ge_b850v3_fw_i2c_table,
+ .probe = stdp2690_ge_b850v3_fw_probe,
+ .remove = stdp2690_ge_b850v3_fw_remove,
+ .driver = {
+ .name = "stdp2690-ge-b850v3-fw",
+ .of_match_table = stdp2690_ge_b850v3_fw_match,
+ },
+};
+
+static int __init stdpxxxx_ge_b850v3_init(void)
+{
+ int ret;
+
+ ret = i2c_add_driver(&stdp4028_ge_b850v3_fw_driver);
+ if (ret)
+ return ret;
+
+ ret = i2c_add_driver(&stdp2690_ge_b850v3_fw_driver);
+ if (ret)
+ i2c_del_driver(&stdp4028_ge_b850v3_fw_driver);
+
+ return ret;
+}
+module_init(stdpxxxx_ge_b850v3_init);
+
+static void __exit stdpxxxx_ge_b850v3_exit(void)
+{
+ i2c_del_driver(&stdp2690_ge_b850v3_fw_driver);
+ i2c_del_driver(&stdp4028_ge_b850v3_fw_driver);
+}
+module_exit(stdpxxxx_ge_b850v3_exit);
+
+MODULE_AUTHOR("Peter Senna Tschudin <peter.senna@collabora.com>");
+MODULE_AUTHOR("Martyn Welch <martyn.welch@collabora.co.uk>");
+MODULE_DESCRIPTION("GE LVDS to DP++ display bridge)");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/nwl-dsi.c b/drivers/gpu/drm/bridge/nwl-dsi.c
new file mode 100644
index 000000000..6dc2a4e19
--- /dev/null
+++ b/drivers/gpu/drm/bridge/nwl-dsi.c
@@ -0,0 +1,1227 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * i.MX8 NWL MIPI DSI host driver
+ *
+ * Copyright (C) 2017 NXP
+ * Copyright (C) 2020 Purism SPC
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/irq.h>
+#include <linux/math64.h>
+#include <linux/mfd/syscon.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/mux/consumer.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include <linux/sys_soc.h>
+#include <linux/time64.h>
+
+#include <drm/drm_atomic_state_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <drm/drm_print.h>
+
+#include <video/mipi_display.h>
+
+#include "nwl-dsi.h"
+
+#define DRV_NAME "nwl-dsi"
+
+/* i.MX8 NWL quirks */
+/* i.MX8MQ errata E11418 */
+#define E11418_HS_MODE_QUIRK BIT(0)
+
+#define NWL_DSI_MIPI_FIFO_TIMEOUT msecs_to_jiffies(500)
+
+enum transfer_direction {
+ DSI_PACKET_SEND,
+ DSI_PACKET_RECEIVE,
+};
+
+#define NWL_DSI_ENDPOINT_LCDIF 0
+#define NWL_DSI_ENDPOINT_DCSS 1
+
+struct nwl_dsi_transfer {
+ const struct mipi_dsi_msg *msg;
+ struct mipi_dsi_packet packet;
+ struct completion completed;
+
+ int status; /* status of transmission */
+ enum transfer_direction direction;
+ bool need_bta;
+ u8 cmd;
+ u16 rx_word_count;
+ size_t tx_len; /* in bytes */
+ size_t rx_len; /* in bytes */
+};
+
+struct nwl_dsi {
+ struct drm_bridge bridge;
+ struct mipi_dsi_host dsi_host;
+ struct device *dev;
+ struct phy *phy;
+ union phy_configure_opts phy_cfg;
+ unsigned int quirks;
+
+ struct regmap *regmap;
+ int irq;
+ /*
+ * The DSI host controller needs this reset sequence according to NWL:
+ * 1. Deassert pclk reset to get access to DSI regs
+ * 2. Configure DSI Host and DPHY and enable DPHY
+ * 3. Deassert ESC and BYTE resets to allow host TX operations)
+ * 4. Send DSI cmds to configure peripheral (handled by panel drv)
+ * 5. Deassert DPI reset so DPI receives pixels and starts sending
+ * DSI data
+ *
+ * TODO: Since panel_bridges do their DSI setup in enable we
+ * currently have 4. and 5. swapped.
+ */
+ struct reset_control *rst_byte;
+ struct reset_control *rst_esc;
+ struct reset_control *rst_dpi;
+ struct reset_control *rst_pclk;
+ struct mux_control *mux;
+
+ /* DSI clocks */
+ struct clk *phy_ref_clk;
+ struct clk *rx_esc_clk;
+ struct clk *tx_esc_clk;
+ struct clk *core_clk;
+ /*
+ * hardware bug: the i.MX8MQ needs this clock on during reset
+ * even when not using LCDIF.
+ */
+ struct clk *lcdif_clk;
+
+ /* dsi lanes */
+ u32 lanes;
+ enum mipi_dsi_pixel_format format;
+ struct drm_display_mode mode;
+ unsigned long dsi_mode_flags;
+ int error;
+
+ struct nwl_dsi_transfer *xfer;
+};
+
+static const struct regmap_config nwl_dsi_regmap_config = {
+ .reg_bits = 16,
+ .val_bits = 32,
+ .reg_stride = 4,
+ .max_register = NWL_DSI_IRQ_MASK2,
+ .name = DRV_NAME,
+};
+
+static inline struct nwl_dsi *bridge_to_dsi(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct nwl_dsi, bridge);
+}
+
+static int nwl_dsi_clear_error(struct nwl_dsi *dsi)
+{
+ int ret = dsi->error;
+
+ dsi->error = 0;
+ return ret;
+}
+
+static void nwl_dsi_write(struct nwl_dsi *dsi, unsigned int reg, u32 val)
+{
+ int ret;
+
+ if (dsi->error)
+ return;
+
+ ret = regmap_write(dsi->regmap, reg, val);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dsi->dev,
+ "Failed to write NWL DSI reg 0x%x: %d\n", reg,
+ ret);
+ dsi->error = ret;
+ }
+}
+
+static u32 nwl_dsi_read(struct nwl_dsi *dsi, u32 reg)
+{
+ unsigned int val;
+ int ret;
+
+ if (dsi->error)
+ return 0;
+
+ ret = regmap_read(dsi->regmap, reg, &val);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dsi->dev, "Failed to read NWL DSI reg 0x%x: %d\n",
+ reg, ret);
+ dsi->error = ret;
+ }
+ return val;
+}
+
+static int nwl_dsi_get_dpi_pixel_format(enum mipi_dsi_pixel_format format)
+{
+ switch (format) {
+ case MIPI_DSI_FMT_RGB565:
+ return NWL_DSI_PIXEL_FORMAT_16;
+ case MIPI_DSI_FMT_RGB666:
+ return NWL_DSI_PIXEL_FORMAT_18L;
+ case MIPI_DSI_FMT_RGB666_PACKED:
+ return NWL_DSI_PIXEL_FORMAT_18;
+ case MIPI_DSI_FMT_RGB888:
+ return NWL_DSI_PIXEL_FORMAT_24;
+ default:
+ return -EINVAL;
+ }
+}
+
+/*
+ * ps2bc - Picoseconds to byte clock cycles
+ */
+static u32 ps2bc(struct nwl_dsi *dsi, unsigned long long ps)
+{
+ u32 bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
+
+ return DIV64_U64_ROUND_UP(ps * dsi->mode.clock * bpp,
+ dsi->lanes * 8ULL * NSEC_PER_SEC);
+}
+
+/*
+ * ui2bc - UI time periods to byte clock cycles
+ */
+static u32 ui2bc(unsigned int ui)
+{
+ return DIV_ROUND_UP(ui, BITS_PER_BYTE);
+}
+
+/*
+ * us2bc - micro seconds to lp clock cycles
+ */
+static u32 us2lp(u32 lp_clk_rate, unsigned long us)
+{
+ return DIV_ROUND_UP(us * lp_clk_rate, USEC_PER_SEC);
+}
+
+static int nwl_dsi_config_host(struct nwl_dsi *dsi)
+{
+ u32 cycles;
+ struct phy_configure_opts_mipi_dphy *cfg = &dsi->phy_cfg.mipi_dphy;
+
+ if (dsi->lanes < 1 || dsi->lanes > 4)
+ return -EINVAL;
+
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "DSI Lanes %d\n", dsi->lanes);
+ nwl_dsi_write(dsi, NWL_DSI_CFG_NUM_LANES, dsi->lanes - 1);
+
+ if (dsi->dsi_mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) {
+ nwl_dsi_write(dsi, NWL_DSI_CFG_NONCONTINUOUS_CLK, 0x01);
+ nwl_dsi_write(dsi, NWL_DSI_CFG_AUTOINSERT_EOTP, 0x01);
+ } else {
+ nwl_dsi_write(dsi, NWL_DSI_CFG_NONCONTINUOUS_CLK, 0x00);
+ nwl_dsi_write(dsi, NWL_DSI_CFG_AUTOINSERT_EOTP, 0x00);
+ }
+
+ /* values in byte clock cycles */
+ cycles = ui2bc(cfg->clk_pre);
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "cfg_t_pre: 0x%x\n", cycles);
+ nwl_dsi_write(dsi, NWL_DSI_CFG_T_PRE, cycles);
+ cycles = ps2bc(dsi, cfg->lpx + cfg->clk_prepare + cfg->clk_zero);
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "cfg_tx_gap (pre): 0x%x\n", cycles);
+ cycles += ui2bc(cfg->clk_pre);
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "cfg_t_post: 0x%x\n", cycles);
+ nwl_dsi_write(dsi, NWL_DSI_CFG_T_POST, cycles);
+ cycles = ps2bc(dsi, cfg->hs_exit);
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "cfg_tx_gap: 0x%x\n", cycles);
+ nwl_dsi_write(dsi, NWL_DSI_CFG_TX_GAP, cycles);
+
+ nwl_dsi_write(dsi, NWL_DSI_CFG_EXTRA_CMDS_AFTER_EOTP, 0x01);
+ nwl_dsi_write(dsi, NWL_DSI_CFG_HTX_TO_COUNT, 0x00);
+ nwl_dsi_write(dsi, NWL_DSI_CFG_LRX_H_TO_COUNT, 0x00);
+ nwl_dsi_write(dsi, NWL_DSI_CFG_BTA_H_TO_COUNT, 0x00);
+ /* In LP clock cycles */
+ cycles = us2lp(cfg->lp_clk_rate, cfg->wakeup);
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "cfg_twakeup: 0x%x\n", cycles);
+ nwl_dsi_write(dsi, NWL_DSI_CFG_TWAKEUP, cycles);
+
+ return nwl_dsi_clear_error(dsi);
+}
+
+static int nwl_dsi_config_dpi(struct nwl_dsi *dsi)
+{
+ u32 mode;
+ int color_format;
+ bool burst_mode;
+ int hfront_porch, hback_porch, vfront_porch, vback_porch;
+ int hsync_len, vsync_len;
+
+ hfront_porch = dsi->mode.hsync_start - dsi->mode.hdisplay;
+ hsync_len = dsi->mode.hsync_end - dsi->mode.hsync_start;
+ hback_porch = dsi->mode.htotal - dsi->mode.hsync_end;
+
+ vfront_porch = dsi->mode.vsync_start - dsi->mode.vdisplay;
+ vsync_len = dsi->mode.vsync_end - dsi->mode.vsync_start;
+ vback_porch = dsi->mode.vtotal - dsi->mode.vsync_end;
+
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "hfront_porch = %d\n", hfront_porch);
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "hback_porch = %d\n", hback_porch);
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "hsync_len = %d\n", hsync_len);
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "hdisplay = %d\n", dsi->mode.hdisplay);
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "vfront_porch = %d\n", vfront_porch);
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "vback_porch = %d\n", vback_porch);
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "vsync_len = %d\n", vsync_len);
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "vactive = %d\n", dsi->mode.vdisplay);
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "clock = %d kHz\n", dsi->mode.clock);
+
+ color_format = nwl_dsi_get_dpi_pixel_format(dsi->format);
+ if (color_format < 0) {
+ DRM_DEV_ERROR(dsi->dev, "Invalid color format 0x%x\n",
+ dsi->format);
+ return color_format;
+ }
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "pixel fmt = %d\n", dsi->format);
+
+ nwl_dsi_write(dsi, NWL_DSI_INTERFACE_COLOR_CODING, NWL_DSI_DPI_24_BIT);
+ nwl_dsi_write(dsi, NWL_DSI_PIXEL_FORMAT, color_format);
+ /*
+ * Adjusting input polarity based on the video mode results in
+ * a black screen so always pick active low:
+ */
+ nwl_dsi_write(dsi, NWL_DSI_VSYNC_POLARITY,
+ NWL_DSI_VSYNC_POLARITY_ACTIVE_LOW);
+ nwl_dsi_write(dsi, NWL_DSI_HSYNC_POLARITY,
+ NWL_DSI_HSYNC_POLARITY_ACTIVE_LOW);
+
+ burst_mode = (dsi->dsi_mode_flags & MIPI_DSI_MODE_VIDEO_BURST) &&
+ !(dsi->dsi_mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE);
+
+ if (burst_mode) {
+ nwl_dsi_write(dsi, NWL_DSI_VIDEO_MODE, NWL_DSI_VM_BURST_MODE);
+ nwl_dsi_write(dsi, NWL_DSI_PIXEL_FIFO_SEND_LEVEL, 256);
+ } else {
+ mode = ((dsi->dsi_mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) ?
+ NWL_DSI_VM_BURST_MODE_WITH_SYNC_PULSES :
+ NWL_DSI_VM_NON_BURST_MODE_WITH_SYNC_EVENTS);
+ nwl_dsi_write(dsi, NWL_DSI_VIDEO_MODE, mode);
+ nwl_dsi_write(dsi, NWL_DSI_PIXEL_FIFO_SEND_LEVEL,
+ dsi->mode.hdisplay);
+ }
+
+ nwl_dsi_write(dsi, NWL_DSI_HFP, hfront_porch);
+ nwl_dsi_write(dsi, NWL_DSI_HBP, hback_porch);
+ nwl_dsi_write(dsi, NWL_DSI_HSA, hsync_len);
+
+ nwl_dsi_write(dsi, NWL_DSI_ENABLE_MULT_PKTS, 0x0);
+ nwl_dsi_write(dsi, NWL_DSI_BLLP_MODE, 0x1);
+ nwl_dsi_write(dsi, NWL_DSI_USE_NULL_PKT_BLLP, 0x0);
+ nwl_dsi_write(dsi, NWL_DSI_VC, 0x0);
+
+ nwl_dsi_write(dsi, NWL_DSI_PIXEL_PAYLOAD_SIZE, dsi->mode.hdisplay);
+ nwl_dsi_write(dsi, NWL_DSI_VACTIVE, dsi->mode.vdisplay - 1);
+ nwl_dsi_write(dsi, NWL_DSI_VBP, vback_porch);
+ nwl_dsi_write(dsi, NWL_DSI_VFP, vfront_porch);
+
+ return nwl_dsi_clear_error(dsi);
+}
+
+static int nwl_dsi_init_interrupts(struct nwl_dsi *dsi)
+{
+ u32 irq_enable = ~(u32)(NWL_DSI_TX_PKT_DONE_MASK |
+ NWL_DSI_RX_PKT_HDR_RCVD_MASK |
+ NWL_DSI_TX_FIFO_OVFLW_MASK |
+ NWL_DSI_HS_TX_TIMEOUT_MASK);
+
+ nwl_dsi_write(dsi, NWL_DSI_IRQ_MASK, irq_enable);
+ nwl_dsi_write(dsi, NWL_DSI_IRQ_MASK2, 0x7);
+
+ return nwl_dsi_clear_error(dsi);
+}
+
+static int nwl_dsi_host_attach(struct mipi_dsi_host *dsi_host,
+ struct mipi_dsi_device *device)
+{
+ struct nwl_dsi *dsi = container_of(dsi_host, struct nwl_dsi, dsi_host);
+ struct device *dev = dsi->dev;
+
+ DRM_DEV_INFO(dev, "lanes=%u, format=0x%x flags=0x%lx\n", device->lanes,
+ device->format, device->mode_flags);
+
+ if (device->lanes < 1 || device->lanes > 4)
+ return -EINVAL;
+
+ dsi->lanes = device->lanes;
+ dsi->format = device->format;
+ dsi->dsi_mode_flags = device->mode_flags;
+
+ return 0;
+}
+
+static bool nwl_dsi_read_packet(struct nwl_dsi *dsi, u32 status)
+{
+ struct device *dev = dsi->dev;
+ struct nwl_dsi_transfer *xfer = dsi->xfer;
+ int err;
+ u8 *payload = xfer->msg->rx_buf;
+ u32 val;
+ u16 word_count;
+ u8 channel;
+ u8 data_type;
+
+ xfer->status = 0;
+
+ if (xfer->rx_word_count == 0) {
+ if (!(status & NWL_DSI_RX_PKT_HDR_RCVD))
+ return false;
+ /* Get the RX header and parse it */
+ val = nwl_dsi_read(dsi, NWL_DSI_RX_PKT_HEADER);
+ err = nwl_dsi_clear_error(dsi);
+ if (err)
+ xfer->status = err;
+ word_count = NWL_DSI_WC(val);
+ channel = NWL_DSI_RX_VC(val);
+ data_type = NWL_DSI_RX_DT(val);
+
+ if (channel != xfer->msg->channel) {
+ DRM_DEV_ERROR(dev,
+ "[%02X] Channel mismatch (%u != %u)\n",
+ xfer->cmd, channel, xfer->msg->channel);
+ xfer->status = -EINVAL;
+ return true;
+ }
+
+ switch (data_type) {
+ case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
+ case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
+ if (xfer->msg->rx_len > 1) {
+ /* read second byte */
+ payload[1] = word_count >> 8;
+ ++xfer->rx_len;
+ }
+ fallthrough;
+ case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
+ case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
+ if (xfer->msg->rx_len > 0) {
+ /* read first byte */
+ payload[0] = word_count & 0xff;
+ ++xfer->rx_len;
+ }
+ xfer->status = xfer->rx_len;
+ return true;
+ case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
+ word_count &= 0xff;
+ DRM_DEV_ERROR(dev, "[%02X] DSI error report: 0x%02x\n",
+ xfer->cmd, word_count);
+ xfer->status = -EPROTO;
+ return true;
+ }
+
+ if (word_count > xfer->msg->rx_len) {
+ DRM_DEV_ERROR(dev,
+ "[%02X] Receive buffer too small: %zu (< %u)\n",
+ xfer->cmd, xfer->msg->rx_len, word_count);
+ xfer->status = -EINVAL;
+ return true;
+ }
+
+ xfer->rx_word_count = word_count;
+ } else {
+ /* Set word_count from previous header read */
+ word_count = xfer->rx_word_count;
+ }
+
+ /* If RX payload is not yet received, wait for it */
+ if (!(status & NWL_DSI_RX_PKT_PAYLOAD_DATA_RCVD))
+ return false;
+
+ /* Read the RX payload */
+ while (word_count >= 4) {
+ val = nwl_dsi_read(dsi, NWL_DSI_RX_PAYLOAD);
+ payload[0] = (val >> 0) & 0xff;
+ payload[1] = (val >> 8) & 0xff;
+ payload[2] = (val >> 16) & 0xff;
+ payload[3] = (val >> 24) & 0xff;
+ payload += 4;
+ xfer->rx_len += 4;
+ word_count -= 4;
+ }
+
+ if (word_count > 0) {
+ val = nwl_dsi_read(dsi, NWL_DSI_RX_PAYLOAD);
+ switch (word_count) {
+ case 3:
+ payload[2] = (val >> 16) & 0xff;
+ ++xfer->rx_len;
+ fallthrough;
+ case 2:
+ payload[1] = (val >> 8) & 0xff;
+ ++xfer->rx_len;
+ fallthrough;
+ case 1:
+ payload[0] = (val >> 0) & 0xff;
+ ++xfer->rx_len;
+ break;
+ }
+ }
+
+ xfer->status = xfer->rx_len;
+ err = nwl_dsi_clear_error(dsi);
+ if (err)
+ xfer->status = err;
+
+ return true;
+}
+
+static void nwl_dsi_finish_transmission(struct nwl_dsi *dsi, u32 status)
+{
+ struct nwl_dsi_transfer *xfer = dsi->xfer;
+ bool end_packet = false;
+
+ if (!xfer)
+ return;
+
+ if (xfer->direction == DSI_PACKET_SEND &&
+ status & NWL_DSI_TX_PKT_DONE) {
+ xfer->status = xfer->tx_len;
+ end_packet = true;
+ } else if (status & NWL_DSI_DPHY_DIRECTION &&
+ ((status & (NWL_DSI_RX_PKT_HDR_RCVD |
+ NWL_DSI_RX_PKT_PAYLOAD_DATA_RCVD)))) {
+ end_packet = nwl_dsi_read_packet(dsi, status);
+ }
+
+ if (end_packet)
+ complete(&xfer->completed);
+}
+
+static void nwl_dsi_begin_transmission(struct nwl_dsi *dsi)
+{
+ struct nwl_dsi_transfer *xfer = dsi->xfer;
+ struct mipi_dsi_packet *pkt = &xfer->packet;
+ const u8 *payload;
+ size_t length;
+ u16 word_count;
+ u8 hs_mode;
+ u32 val;
+ u32 hs_workaround = 0;
+
+ /* Send the payload, if any */
+ length = pkt->payload_length;
+ payload = pkt->payload;
+
+ while (length >= 4) {
+ val = *(u32 *)payload;
+ hs_workaround |= !(val & 0xFFFF00);
+ nwl_dsi_write(dsi, NWL_DSI_TX_PAYLOAD, val);
+ payload += 4;
+ length -= 4;
+ }
+ /* Send the rest of the payload */
+ val = 0;
+ switch (length) {
+ case 3:
+ val |= payload[2] << 16;
+ fallthrough;
+ case 2:
+ val |= payload[1] << 8;
+ hs_workaround |= !(val & 0xFFFF00);
+ fallthrough;
+ case 1:
+ val |= payload[0];
+ nwl_dsi_write(dsi, NWL_DSI_TX_PAYLOAD, val);
+ break;
+ }
+ xfer->tx_len = pkt->payload_length;
+
+ /*
+ * Send the header
+ * header[0] = Virtual Channel + Data Type
+ * header[1] = Word Count LSB (LP) or first param (SP)
+ * header[2] = Word Count MSB (LP) or second param (SP)
+ */
+ word_count = pkt->header[1] | (pkt->header[2] << 8);
+ if (hs_workaround && (dsi->quirks & E11418_HS_MODE_QUIRK)) {
+ DRM_DEV_DEBUG_DRIVER(dsi->dev,
+ "Using hs mode workaround for cmd 0x%x\n",
+ xfer->cmd);
+ hs_mode = 1;
+ } else {
+ hs_mode = (xfer->msg->flags & MIPI_DSI_MSG_USE_LPM) ? 0 : 1;
+ }
+ val = NWL_DSI_WC(word_count) | NWL_DSI_TX_VC(xfer->msg->channel) |
+ NWL_DSI_TX_DT(xfer->msg->type) | NWL_DSI_HS_SEL(hs_mode) |
+ NWL_DSI_BTA_TX(xfer->need_bta);
+ nwl_dsi_write(dsi, NWL_DSI_PKT_CONTROL, val);
+
+ /* Send packet command */
+ nwl_dsi_write(dsi, NWL_DSI_SEND_PACKET, 0x1);
+}
+
+static ssize_t nwl_dsi_host_transfer(struct mipi_dsi_host *dsi_host,
+ const struct mipi_dsi_msg *msg)
+{
+ struct nwl_dsi *dsi = container_of(dsi_host, struct nwl_dsi, dsi_host);
+ struct nwl_dsi_transfer xfer;
+ ssize_t ret = 0;
+
+ /* Create packet to be sent */
+ dsi->xfer = &xfer;
+ ret = mipi_dsi_create_packet(&xfer.packet, msg);
+ if (ret < 0) {
+ dsi->xfer = NULL;
+ return ret;
+ }
+
+ if ((msg->type & MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM ||
+ msg->type & MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM ||
+ msg->type & MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM ||
+ msg->type & MIPI_DSI_DCS_READ) &&
+ msg->rx_len > 0 && msg->rx_buf)
+ xfer.direction = DSI_PACKET_RECEIVE;
+ else
+ xfer.direction = DSI_PACKET_SEND;
+
+ xfer.need_bta = (xfer.direction == DSI_PACKET_RECEIVE);
+ xfer.need_bta |= (msg->flags & MIPI_DSI_MSG_REQ_ACK) ? 1 : 0;
+ xfer.msg = msg;
+ xfer.status = -ETIMEDOUT;
+ xfer.rx_word_count = 0;
+ xfer.rx_len = 0;
+ xfer.cmd = 0x00;
+ if (msg->tx_len > 0)
+ xfer.cmd = ((u8 *)(msg->tx_buf))[0];
+ init_completion(&xfer.completed);
+
+ ret = clk_prepare_enable(dsi->rx_esc_clk);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dsi->dev, "Failed to enable rx_esc clk: %zd\n",
+ ret);
+ return ret;
+ }
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "Enabled rx_esc clk @%lu Hz\n",
+ clk_get_rate(dsi->rx_esc_clk));
+
+ /* Initiate the DSI packet transmision */
+ nwl_dsi_begin_transmission(dsi);
+
+ if (!wait_for_completion_timeout(&xfer.completed,
+ NWL_DSI_MIPI_FIFO_TIMEOUT)) {
+ DRM_DEV_ERROR(dsi_host->dev, "[%02X] DSI transfer timed out\n",
+ xfer.cmd);
+ ret = -ETIMEDOUT;
+ } else {
+ ret = xfer.status;
+ }
+
+ clk_disable_unprepare(dsi->rx_esc_clk);
+
+ return ret;
+}
+
+static const struct mipi_dsi_host_ops nwl_dsi_host_ops = {
+ .attach = nwl_dsi_host_attach,
+ .transfer = nwl_dsi_host_transfer,
+};
+
+static irqreturn_t nwl_dsi_irq_handler(int irq, void *data)
+{
+ u32 irq_status;
+ struct nwl_dsi *dsi = data;
+
+ irq_status = nwl_dsi_read(dsi, NWL_DSI_IRQ_STATUS);
+
+ if (irq_status & NWL_DSI_TX_FIFO_OVFLW)
+ DRM_DEV_ERROR_RATELIMITED(dsi->dev, "tx fifo overflow\n");
+
+ if (irq_status & NWL_DSI_HS_TX_TIMEOUT)
+ DRM_DEV_ERROR_RATELIMITED(dsi->dev, "HS tx timeout\n");
+
+ if (irq_status & NWL_DSI_TX_PKT_DONE ||
+ irq_status & NWL_DSI_RX_PKT_HDR_RCVD ||
+ irq_status & NWL_DSI_RX_PKT_PAYLOAD_DATA_RCVD)
+ nwl_dsi_finish_transmission(dsi, irq_status);
+
+ return IRQ_HANDLED;
+}
+
+static int nwl_dsi_mode_set(struct nwl_dsi *dsi)
+{
+ struct device *dev = dsi->dev;
+ union phy_configure_opts *phy_cfg = &dsi->phy_cfg;
+ int ret;
+
+ if (!dsi->lanes) {
+ DRM_DEV_ERROR(dev, "Need DSI lanes: %d\n", dsi->lanes);
+ return -EINVAL;
+ }
+
+ ret = phy_init(dsi->phy);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to init DSI phy: %d\n", ret);
+ return ret;
+ }
+
+ ret = phy_set_mode(dsi->phy, PHY_MODE_MIPI_DPHY);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to set DSI phy mode: %d\n", ret);
+ goto uninit_phy;
+ }
+
+ ret = phy_configure(dsi->phy, phy_cfg);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to configure DSI phy: %d\n", ret);
+ goto uninit_phy;
+ }
+
+ ret = clk_prepare_enable(dsi->tx_esc_clk);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dsi->dev, "Failed to enable tx_esc clk: %d\n",
+ ret);
+ goto uninit_phy;
+ }
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "Enabled tx_esc clk @%lu Hz\n",
+ clk_get_rate(dsi->tx_esc_clk));
+
+ ret = nwl_dsi_config_host(dsi);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to set up DSI: %d", ret);
+ goto disable_clock;
+ }
+
+ ret = nwl_dsi_config_dpi(dsi);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to set up DPI: %d", ret);
+ goto disable_clock;
+ }
+
+ ret = phy_power_on(dsi->phy);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to power on DPHY (%d)\n", ret);
+ goto disable_clock;
+ }
+
+ ret = nwl_dsi_init_interrupts(dsi);
+ if (ret < 0)
+ goto power_off_phy;
+
+ return ret;
+
+power_off_phy:
+ phy_power_off(dsi->phy);
+disable_clock:
+ clk_disable_unprepare(dsi->tx_esc_clk);
+uninit_phy:
+ phy_exit(dsi->phy);
+
+ return ret;
+}
+
+static int nwl_dsi_disable(struct nwl_dsi *dsi)
+{
+ struct device *dev = dsi->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "Disabling clocks and phy\n");
+
+ phy_power_off(dsi->phy);
+ phy_exit(dsi->phy);
+
+ /* Disabling the clock before the phy breaks enabling dsi again */
+ clk_disable_unprepare(dsi->tx_esc_clk);
+
+ return 0;
+}
+
+static void
+nwl_dsi_bridge_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct nwl_dsi *dsi = bridge_to_dsi(bridge);
+ int ret;
+
+ nwl_dsi_disable(dsi);
+
+ ret = reset_control_assert(dsi->rst_dpi);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dsi->dev, "Failed to assert DPI: %d\n", ret);
+ return;
+ }
+ ret = reset_control_assert(dsi->rst_byte);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dsi->dev, "Failed to assert ESC: %d\n", ret);
+ return;
+ }
+ ret = reset_control_assert(dsi->rst_esc);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dsi->dev, "Failed to assert BYTE: %d\n", ret);
+ return;
+ }
+ ret = reset_control_assert(dsi->rst_pclk);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dsi->dev, "Failed to assert PCLK: %d\n", ret);
+ return;
+ }
+
+ clk_disable_unprepare(dsi->core_clk);
+ clk_disable_unprepare(dsi->lcdif_clk);
+
+ pm_runtime_put(dsi->dev);
+}
+
+static int nwl_dsi_get_dphy_params(struct nwl_dsi *dsi,
+ const struct drm_display_mode *mode,
+ union phy_configure_opts *phy_opts)
+{
+ unsigned long rate;
+ int ret;
+
+ if (dsi->lanes < 1 || dsi->lanes > 4)
+ return -EINVAL;
+
+ /*
+ * So far the DPHY spec minimal timings work for both mixel
+ * dphy and nwl dsi host
+ */
+ ret = phy_mipi_dphy_get_default_config(mode->clock * 1000,
+ mipi_dsi_pixel_format_to_bpp(dsi->format), dsi->lanes,
+ &phy_opts->mipi_dphy);
+ if (ret < 0)
+ return ret;
+
+ rate = clk_get_rate(dsi->tx_esc_clk);
+ DRM_DEV_DEBUG_DRIVER(dsi->dev, "LP clk is @%lu Hz\n", rate);
+ phy_opts->mipi_dphy.lp_clk_rate = rate;
+
+ return 0;
+}
+
+static enum drm_mode_status
+nwl_dsi_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct nwl_dsi *dsi = bridge_to_dsi(bridge);
+ int bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
+
+ if (mode->clock * bpp > 15000000 * dsi->lanes)
+ return MODE_CLOCK_HIGH;
+
+ if (mode->clock * bpp < 80000 * dsi->lanes)
+ return MODE_CLOCK_LOW;
+
+ return MODE_OK;
+}
+
+static int nwl_dsi_bridge_atomic_check(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
+
+ /* At least LCDIF + NWL needs active high sync */
+ adjusted_mode->flags |= (DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC);
+ adjusted_mode->flags &= ~(DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC);
+
+ /*
+ * Do a full modeset if crtc_state->active is changed to be true.
+ * This ensures our ->mode_set() is called to get the DSI controller
+ * and the PHY ready to send DCS commands, when only the connector's
+ * DPMS is brought out of "Off" status.
+ */
+ if (crtc_state->active_changed && crtc_state->active)
+ crtc_state->mode_changed = true;
+
+ return 0;
+}
+
+static void
+nwl_dsi_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ struct nwl_dsi *dsi = bridge_to_dsi(bridge);
+ struct device *dev = dsi->dev;
+ union phy_configure_opts new_cfg;
+ unsigned long phy_ref_rate;
+ int ret;
+
+ ret = nwl_dsi_get_dphy_params(dsi, adjusted_mode, &new_cfg);
+ if (ret < 0)
+ return;
+
+ phy_ref_rate = clk_get_rate(dsi->phy_ref_clk);
+ DRM_DEV_DEBUG_DRIVER(dev, "PHY at ref rate: %lu\n", phy_ref_rate);
+ /* Save the new desired phy config */
+ memcpy(&dsi->phy_cfg, &new_cfg, sizeof(new_cfg));
+
+ drm_mode_copy(&dsi->mode, adjusted_mode);
+ drm_mode_debug_printmodeline(adjusted_mode);
+
+ if (pm_runtime_resume_and_get(dev) < 0)
+ return;
+
+ if (clk_prepare_enable(dsi->lcdif_clk) < 0)
+ goto runtime_put;
+ if (clk_prepare_enable(dsi->core_clk) < 0)
+ goto runtime_put;
+
+ /* Step 1 from DSI reset-out instructions */
+ ret = reset_control_deassert(dsi->rst_pclk);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to deassert PCLK: %d\n", ret);
+ goto runtime_put;
+ }
+
+ /* Step 2 from DSI reset-out instructions */
+ nwl_dsi_mode_set(dsi);
+
+ /* Step 3 from DSI reset-out instructions */
+ ret = reset_control_deassert(dsi->rst_esc);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to deassert ESC: %d\n", ret);
+ goto runtime_put;
+ }
+ ret = reset_control_deassert(dsi->rst_byte);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to deassert BYTE: %d\n", ret);
+ goto runtime_put;
+ }
+
+ return;
+
+runtime_put:
+ pm_runtime_put_sync(dev);
+}
+
+static void
+nwl_dsi_bridge_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct nwl_dsi *dsi = bridge_to_dsi(bridge);
+ int ret;
+
+ /* Step 5 from DSI reset-out instructions */
+ ret = reset_control_deassert(dsi->rst_dpi);
+ if (ret < 0)
+ DRM_DEV_ERROR(dsi->dev, "Failed to deassert DPI: %d\n", ret);
+}
+
+static int nwl_dsi_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct nwl_dsi *dsi = bridge_to_dsi(bridge);
+ struct drm_bridge *panel_bridge;
+
+ panel_bridge = devm_drm_of_get_bridge(dsi->dev, dsi->dev->of_node, 1, 0);
+ if (IS_ERR(panel_bridge))
+ return PTR_ERR(panel_bridge);
+
+ return drm_bridge_attach(bridge->encoder, panel_bridge, bridge, flags);
+}
+
+static u32 *nwl_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ u32 *input_fmts, input_fmt;
+
+ *num_input_fmts = 0;
+
+ switch (output_fmt) {
+ /* If MEDIA_BUS_FMT_FIXED is tested, return default bus format */
+ case MEDIA_BUS_FMT_FIXED:
+ input_fmt = MEDIA_BUS_FMT_RGB888_1X24;
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X24:
+ case MEDIA_BUS_FMT_RGB666_1X18:
+ case MEDIA_BUS_FMT_RGB565_1X16:
+ input_fmt = output_fmt;
+ break;
+ default:
+ return NULL;
+ }
+
+ input_fmts = kcalloc(1, sizeof(*input_fmts), GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+ input_fmts[0] = input_fmt;
+ *num_input_fmts = 1;
+
+ return input_fmts;
+}
+
+static const struct drm_bridge_funcs nwl_dsi_bridge_funcs = {
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .atomic_check = nwl_dsi_bridge_atomic_check,
+ .atomic_enable = nwl_dsi_bridge_atomic_enable,
+ .atomic_disable = nwl_dsi_bridge_atomic_disable,
+ .atomic_get_input_bus_fmts = nwl_bridge_atomic_get_input_bus_fmts,
+ .mode_set = nwl_dsi_bridge_mode_set,
+ .mode_valid = nwl_dsi_bridge_mode_valid,
+ .attach = nwl_dsi_bridge_attach,
+};
+
+static int nwl_dsi_parse_dt(struct nwl_dsi *dsi)
+{
+ struct platform_device *pdev = to_platform_device(dsi->dev);
+ struct clk *clk;
+ void __iomem *base;
+ int ret;
+
+ dsi->phy = devm_phy_get(dsi->dev, "dphy");
+ if (IS_ERR(dsi->phy)) {
+ ret = PTR_ERR(dsi->phy);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dsi->dev, "Could not get PHY: %d\n", ret);
+ return ret;
+ }
+
+ clk = devm_clk_get(dsi->dev, "lcdif");
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ DRM_DEV_ERROR(dsi->dev, "Failed to get lcdif clock: %d\n",
+ ret);
+ return ret;
+ }
+ dsi->lcdif_clk = clk;
+
+ clk = devm_clk_get(dsi->dev, "core");
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ DRM_DEV_ERROR(dsi->dev, "Failed to get core clock: %d\n",
+ ret);
+ return ret;
+ }
+ dsi->core_clk = clk;
+
+ clk = devm_clk_get(dsi->dev, "phy_ref");
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ DRM_DEV_ERROR(dsi->dev, "Failed to get phy_ref clock: %d\n",
+ ret);
+ return ret;
+ }
+ dsi->phy_ref_clk = clk;
+
+ clk = devm_clk_get(dsi->dev, "rx_esc");
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ DRM_DEV_ERROR(dsi->dev, "Failed to get rx_esc clock: %d\n",
+ ret);
+ return ret;
+ }
+ dsi->rx_esc_clk = clk;
+
+ clk = devm_clk_get(dsi->dev, "tx_esc");
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ DRM_DEV_ERROR(dsi->dev, "Failed to get tx_esc clock: %d\n",
+ ret);
+ return ret;
+ }
+ dsi->tx_esc_clk = clk;
+
+ dsi->mux = devm_mux_control_get(dsi->dev, NULL);
+ if (IS_ERR(dsi->mux)) {
+ ret = PTR_ERR(dsi->mux);
+ if (ret != -EPROBE_DEFER)
+ DRM_DEV_ERROR(dsi->dev, "Failed to get mux: %d\n", ret);
+ return ret;
+ }
+
+ base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ dsi->regmap =
+ devm_regmap_init_mmio(dsi->dev, base, &nwl_dsi_regmap_config);
+ if (IS_ERR(dsi->regmap)) {
+ ret = PTR_ERR(dsi->regmap);
+ DRM_DEV_ERROR(dsi->dev, "Failed to create NWL DSI regmap: %d\n",
+ ret);
+ return ret;
+ }
+
+ dsi->irq = platform_get_irq(pdev, 0);
+ if (dsi->irq < 0) {
+ DRM_DEV_ERROR(dsi->dev, "Failed to get device IRQ: %d\n",
+ dsi->irq);
+ return dsi->irq;
+ }
+
+ dsi->rst_pclk = devm_reset_control_get_exclusive(dsi->dev, "pclk");
+ if (IS_ERR(dsi->rst_pclk)) {
+ DRM_DEV_ERROR(dsi->dev, "Failed to get pclk reset: %ld\n",
+ PTR_ERR(dsi->rst_pclk));
+ return PTR_ERR(dsi->rst_pclk);
+ }
+ dsi->rst_byte = devm_reset_control_get_exclusive(dsi->dev, "byte");
+ if (IS_ERR(dsi->rst_byte)) {
+ DRM_DEV_ERROR(dsi->dev, "Failed to get byte reset: %ld\n",
+ PTR_ERR(dsi->rst_byte));
+ return PTR_ERR(dsi->rst_byte);
+ }
+ dsi->rst_esc = devm_reset_control_get_exclusive(dsi->dev, "esc");
+ if (IS_ERR(dsi->rst_esc)) {
+ DRM_DEV_ERROR(dsi->dev, "Failed to get esc reset: %ld\n",
+ PTR_ERR(dsi->rst_esc));
+ return PTR_ERR(dsi->rst_esc);
+ }
+ dsi->rst_dpi = devm_reset_control_get_exclusive(dsi->dev, "dpi");
+ if (IS_ERR(dsi->rst_dpi)) {
+ DRM_DEV_ERROR(dsi->dev, "Failed to get dpi reset: %ld\n",
+ PTR_ERR(dsi->rst_dpi));
+ return PTR_ERR(dsi->rst_dpi);
+ }
+ return 0;
+}
+
+static int nwl_dsi_select_input(struct nwl_dsi *dsi)
+{
+ struct device_node *remote;
+ u32 use_dcss = 1;
+ int ret;
+
+ remote = of_graph_get_remote_node(dsi->dev->of_node, 0,
+ NWL_DSI_ENDPOINT_LCDIF);
+ if (remote) {
+ use_dcss = 0;
+ } else {
+ remote = of_graph_get_remote_node(dsi->dev->of_node, 0,
+ NWL_DSI_ENDPOINT_DCSS);
+ if (!remote) {
+ DRM_DEV_ERROR(dsi->dev,
+ "No valid input endpoint found\n");
+ return -EINVAL;
+ }
+ }
+
+ DRM_DEV_INFO(dsi->dev, "Using %s as input source\n",
+ (use_dcss) ? "DCSS" : "LCDIF");
+ ret = mux_control_try_select(dsi->mux, use_dcss);
+ if (ret < 0)
+ DRM_DEV_ERROR(dsi->dev, "Failed to select input: %d\n", ret);
+
+ of_node_put(remote);
+ return ret;
+}
+
+static int nwl_dsi_deselect_input(struct nwl_dsi *dsi)
+{
+ int ret;
+
+ ret = mux_control_deselect(dsi->mux);
+ if (ret < 0)
+ DRM_DEV_ERROR(dsi->dev, "Failed to deselect input: %d\n", ret);
+
+ return ret;
+}
+
+static const struct drm_bridge_timings nwl_dsi_timings = {
+ .input_bus_flags = DRM_BUS_FLAG_DE_LOW,
+};
+
+static const struct of_device_id nwl_dsi_dt_ids[] = {
+ { .compatible = "fsl,imx8mq-nwl-dsi", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, nwl_dsi_dt_ids);
+
+static const struct soc_device_attribute nwl_dsi_quirks_match[] = {
+ { .soc_id = "i.MX8MQ", .revision = "2.0",
+ .data = (void *)E11418_HS_MODE_QUIRK },
+ { /* sentinel. */ }
+};
+
+static int nwl_dsi_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ const struct soc_device_attribute *attr;
+ struct nwl_dsi *dsi;
+ int ret;
+
+ dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
+ if (!dsi)
+ return -ENOMEM;
+
+ dsi->dev = dev;
+
+ ret = nwl_dsi_parse_dt(dsi);
+ if (ret)
+ return ret;
+
+ ret = devm_request_irq(dev, dsi->irq, nwl_dsi_irq_handler, 0,
+ dev_name(dev), dsi);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to request IRQ %d: %d\n", dsi->irq,
+ ret);
+ return ret;
+ }
+
+ dsi->dsi_host.ops = &nwl_dsi_host_ops;
+ dsi->dsi_host.dev = dev;
+ ret = mipi_dsi_host_register(&dsi->dsi_host);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "Failed to register MIPI host: %d\n", ret);
+ return ret;
+ }
+
+ attr = soc_device_match(nwl_dsi_quirks_match);
+ if (attr)
+ dsi->quirks = (uintptr_t)attr->data;
+
+ dsi->bridge.driver_private = dsi;
+ dsi->bridge.funcs = &nwl_dsi_bridge_funcs;
+ dsi->bridge.of_node = dev->of_node;
+ dsi->bridge.timings = &nwl_dsi_timings;
+
+ dev_set_drvdata(dev, dsi);
+ pm_runtime_enable(dev);
+
+ ret = nwl_dsi_select_input(dsi);
+ if (ret < 0) {
+ pm_runtime_disable(dev);
+ mipi_dsi_host_unregister(&dsi->dsi_host);
+ return ret;
+ }
+
+ drm_bridge_add(&dsi->bridge);
+ return 0;
+}
+
+static int nwl_dsi_remove(struct platform_device *pdev)
+{
+ struct nwl_dsi *dsi = platform_get_drvdata(pdev);
+
+ nwl_dsi_deselect_input(dsi);
+ mipi_dsi_host_unregister(&dsi->dsi_host);
+ drm_bridge_remove(&dsi->bridge);
+ pm_runtime_disable(&pdev->dev);
+ return 0;
+}
+
+static struct platform_driver nwl_dsi_driver = {
+ .probe = nwl_dsi_probe,
+ .remove = nwl_dsi_remove,
+ .driver = {
+ .of_match_table = nwl_dsi_dt_ids,
+ .name = DRV_NAME,
+ },
+};
+
+module_platform_driver(nwl_dsi_driver);
+
+MODULE_AUTHOR("NXP Semiconductor");
+MODULE_AUTHOR("Purism SPC");
+MODULE_DESCRIPTION("Northwest Logic MIPI-DSI driver");
+MODULE_LICENSE("GPL"); /* GPLv2 or later */
diff --git a/drivers/gpu/drm/bridge/nwl-dsi.h b/drivers/gpu/drm/bridge/nwl-dsi.h
new file mode 100644
index 000000000..a247a8a11
--- /dev/null
+++ b/drivers/gpu/drm/bridge/nwl-dsi.h
@@ -0,0 +1,144 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * NWL MIPI DSI host driver
+ *
+ * Copyright (C) 2017 NXP
+ * Copyright (C) 2019 Purism SPC
+ */
+#ifndef __NWL_DSI_H__
+#define __NWL_DSI_H__
+
+/* DSI HOST registers */
+#define NWL_DSI_CFG_NUM_LANES 0x0
+#define NWL_DSI_CFG_NONCONTINUOUS_CLK 0x4
+#define NWL_DSI_CFG_T_PRE 0x8
+#define NWL_DSI_CFG_T_POST 0xc
+#define NWL_DSI_CFG_TX_GAP 0x10
+#define NWL_DSI_CFG_AUTOINSERT_EOTP 0x14
+#define NWL_DSI_CFG_EXTRA_CMDS_AFTER_EOTP 0x18
+#define NWL_DSI_CFG_HTX_TO_COUNT 0x1c
+#define NWL_DSI_CFG_LRX_H_TO_COUNT 0x20
+#define NWL_DSI_CFG_BTA_H_TO_COUNT 0x24
+#define NWL_DSI_CFG_TWAKEUP 0x28
+#define NWL_DSI_CFG_STATUS_OUT 0x2c
+#define NWL_DSI_RX_ERROR_STATUS 0x30
+
+/* DSI DPI registers */
+#define NWL_DSI_PIXEL_PAYLOAD_SIZE 0x200
+#define NWL_DSI_PIXEL_FIFO_SEND_LEVEL 0x204
+#define NWL_DSI_INTERFACE_COLOR_CODING 0x208
+#define NWL_DSI_PIXEL_FORMAT 0x20c
+#define NWL_DSI_VSYNC_POLARITY 0x210
+#define NWL_DSI_VSYNC_POLARITY_ACTIVE_LOW 0
+#define NWL_DSI_VSYNC_POLARITY_ACTIVE_HIGH BIT(1)
+
+#define NWL_DSI_HSYNC_POLARITY 0x214
+#define NWL_DSI_HSYNC_POLARITY_ACTIVE_LOW 0
+#define NWL_DSI_HSYNC_POLARITY_ACTIVE_HIGH BIT(1)
+
+#define NWL_DSI_VIDEO_MODE 0x218
+#define NWL_DSI_HFP 0x21c
+#define NWL_DSI_HBP 0x220
+#define NWL_DSI_HSA 0x224
+#define NWL_DSI_ENABLE_MULT_PKTS 0x228
+#define NWL_DSI_VBP 0x22c
+#define NWL_DSI_VFP 0x230
+#define NWL_DSI_BLLP_MODE 0x234
+#define NWL_DSI_USE_NULL_PKT_BLLP 0x238
+#define NWL_DSI_VACTIVE 0x23c
+#define NWL_DSI_VC 0x240
+
+/* DSI APB PKT control */
+#define NWL_DSI_TX_PAYLOAD 0x280
+#define NWL_DSI_PKT_CONTROL 0x284
+#define NWL_DSI_SEND_PACKET 0x288
+#define NWL_DSI_PKT_STATUS 0x28c
+#define NWL_DSI_PKT_FIFO_WR_LEVEL 0x290
+#define NWL_DSI_PKT_FIFO_RD_LEVEL 0x294
+#define NWL_DSI_RX_PAYLOAD 0x298
+#define NWL_DSI_RX_PKT_HEADER 0x29c
+
+/* DSI IRQ handling */
+#define NWL_DSI_IRQ_STATUS 0x2a0
+#define NWL_DSI_SM_NOT_IDLE BIT(0)
+#define NWL_DSI_TX_PKT_DONE BIT(1)
+#define NWL_DSI_DPHY_DIRECTION BIT(2)
+#define NWL_DSI_TX_FIFO_OVFLW BIT(3)
+#define NWL_DSI_TX_FIFO_UDFLW BIT(4)
+#define NWL_DSI_RX_FIFO_OVFLW BIT(5)
+#define NWL_DSI_RX_FIFO_UDFLW BIT(6)
+#define NWL_DSI_RX_PKT_HDR_RCVD BIT(7)
+#define NWL_DSI_RX_PKT_PAYLOAD_DATA_RCVD BIT(8)
+#define NWL_DSI_BTA_TIMEOUT BIT(29)
+#define NWL_DSI_LP_RX_TIMEOUT BIT(30)
+#define NWL_DSI_HS_TX_TIMEOUT BIT(31)
+
+#define NWL_DSI_IRQ_STATUS2 0x2a4
+#define NWL_DSI_SINGLE_BIT_ECC_ERR BIT(0)
+#define NWL_DSI_MULTI_BIT_ECC_ERR BIT(1)
+#define NWL_DSI_CRC_ERR BIT(2)
+
+#define NWL_DSI_IRQ_MASK 0x2a8
+#define NWL_DSI_SM_NOT_IDLE_MASK BIT(0)
+#define NWL_DSI_TX_PKT_DONE_MASK BIT(1)
+#define NWL_DSI_DPHY_DIRECTION_MASK BIT(2)
+#define NWL_DSI_TX_FIFO_OVFLW_MASK BIT(3)
+#define NWL_DSI_TX_FIFO_UDFLW_MASK BIT(4)
+#define NWL_DSI_RX_FIFO_OVFLW_MASK BIT(5)
+#define NWL_DSI_RX_FIFO_UDFLW_MASK BIT(6)
+#define NWL_DSI_RX_PKT_HDR_RCVD_MASK BIT(7)
+#define NWL_DSI_RX_PKT_PAYLOAD_DATA_RCVD_MASK BIT(8)
+#define NWL_DSI_BTA_TIMEOUT_MASK BIT(29)
+#define NWL_DSI_LP_RX_TIMEOUT_MASK BIT(30)
+#define NWL_DSI_HS_TX_TIMEOUT_MASK BIT(31)
+
+#define NWL_DSI_IRQ_MASK2 0x2ac
+#define NWL_DSI_SINGLE_BIT_ECC_ERR_MASK BIT(0)
+#define NWL_DSI_MULTI_BIT_ECC_ERR_MASK BIT(1)
+#define NWL_DSI_CRC_ERR_MASK BIT(2)
+
+/*
+ * PKT_CONTROL format:
+ * [15: 0] - word count
+ * [17:16] - virtual channel
+ * [23:18] - data type
+ * [24] - LP or HS select (0 - LP, 1 - HS)
+ * [25] - perform BTA after packet is sent
+ * [26] - perform BTA only, no packet tx
+ */
+#define NWL_DSI_WC(x) FIELD_PREP(GENMASK(15, 0), (x))
+#define NWL_DSI_TX_VC(x) FIELD_PREP(GENMASK(17, 16), (x))
+#define NWL_DSI_TX_DT(x) FIELD_PREP(GENMASK(23, 18), (x))
+#define NWL_DSI_HS_SEL(x) FIELD_PREP(GENMASK(24, 24), (x))
+#define NWL_DSI_BTA_TX(x) FIELD_PREP(GENMASK(25, 25), (x))
+#define NWL_DSI_BTA_NO_TX(x) FIELD_PREP(GENMASK(26, 26), (x))
+
+/*
+ * RX_PKT_HEADER format:
+ * [15: 0] - word count
+ * [21:16] - data type
+ * [23:22] - virtual channel
+ */
+#define NWL_DSI_RX_DT(x) FIELD_GET(GENMASK(21, 16), (x))
+#define NWL_DSI_RX_VC(x) FIELD_GET(GENMASK(23, 22), (x))
+
+/* DSI Video mode */
+#define NWL_DSI_VM_BURST_MODE_WITH_SYNC_PULSES 0
+#define NWL_DSI_VM_NON_BURST_MODE_WITH_SYNC_EVENTS BIT(0)
+#define NWL_DSI_VM_BURST_MODE BIT(1)
+
+/* * DPI color coding */
+#define NWL_DSI_DPI_16_BIT_565_PACKED 0
+#define NWL_DSI_DPI_16_BIT_565_ALIGNED 1
+#define NWL_DSI_DPI_16_BIT_565_SHIFTED 2
+#define NWL_DSI_DPI_18_BIT_PACKED 3
+#define NWL_DSI_DPI_18_BIT_ALIGNED 4
+#define NWL_DSI_DPI_24_BIT 5
+
+/* * DPI Pixel format */
+#define NWL_DSI_PIXEL_FORMAT_16 0
+#define NWL_DSI_PIXEL_FORMAT_18 BIT(0)
+#define NWL_DSI_PIXEL_FORMAT_18L BIT(1)
+#define NWL_DSI_PIXEL_FORMAT_24 (BIT(0) | BIT(1))
+
+#endif /* __NWL_DSI_H__ */
diff --git a/drivers/gpu/drm/bridge/nxp-ptn3460.c b/drivers/gpu/drm/bridge/nxp-ptn3460.c
new file mode 100644
index 000000000..8686b20ac
--- /dev/null
+++ b/drivers/gpu/drm/bridge/nxp-ptn3460.c
@@ -0,0 +1,350 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * NXP PTN3460 DP/LVDS bridge driver
+ *
+ * Copyright (C) 2013 Google, Inc.
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#define PTN3460_EDID_ADDR 0x0
+#define PTN3460_EDID_EMULATION_ADDR 0x84
+#define PTN3460_EDID_ENABLE_EMULATION 0
+#define PTN3460_EDID_EMULATION_SELECTION 1
+#define PTN3460_EDID_SRAM_LOAD_ADDR 0x85
+
+struct ptn3460_bridge {
+ struct drm_connector connector;
+ struct i2c_client *client;
+ struct drm_bridge bridge;
+ struct drm_bridge *panel_bridge;
+ struct gpio_desc *gpio_pd_n;
+ struct gpio_desc *gpio_rst_n;
+ u32 edid_emulation;
+ bool enabled;
+};
+
+static inline struct ptn3460_bridge *
+ bridge_to_ptn3460(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct ptn3460_bridge, bridge);
+}
+
+static inline struct ptn3460_bridge *
+ connector_to_ptn3460(struct drm_connector *connector)
+{
+ return container_of(connector, struct ptn3460_bridge, connector);
+}
+
+static int ptn3460_read_bytes(struct ptn3460_bridge *ptn_bridge, char addr,
+ u8 *buf, int len)
+{
+ int ret;
+
+ ret = i2c_master_send(ptn_bridge->client, &addr, 1);
+ if (ret < 0) {
+ DRM_ERROR("Failed to send i2c command, ret=%d\n", ret);
+ return ret;
+ }
+
+ ret = i2c_master_recv(ptn_bridge->client, buf, len);
+ if (ret < 0) {
+ DRM_ERROR("Failed to recv i2c data, ret=%d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ptn3460_write_byte(struct ptn3460_bridge *ptn_bridge, char addr,
+ char val)
+{
+ int ret;
+ char buf[2];
+
+ buf[0] = addr;
+ buf[1] = val;
+
+ ret = i2c_master_send(ptn_bridge->client, buf, ARRAY_SIZE(buf));
+ if (ret < 0) {
+ DRM_ERROR("Failed to send i2c command, ret=%d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ptn3460_select_edid(struct ptn3460_bridge *ptn_bridge)
+{
+ int ret;
+ char val;
+
+ /* Load the selected edid into SRAM (accessed at PTN3460_EDID_ADDR) */
+ ret = ptn3460_write_byte(ptn_bridge, PTN3460_EDID_SRAM_LOAD_ADDR,
+ ptn_bridge->edid_emulation);
+ if (ret) {
+ DRM_ERROR("Failed to transfer EDID to sram, ret=%d\n", ret);
+ return ret;
+ }
+
+ /* Enable EDID emulation and select the desired EDID */
+ val = 1 << PTN3460_EDID_ENABLE_EMULATION |
+ ptn_bridge->edid_emulation << PTN3460_EDID_EMULATION_SELECTION;
+
+ ret = ptn3460_write_byte(ptn_bridge, PTN3460_EDID_EMULATION_ADDR, val);
+ if (ret) {
+ DRM_ERROR("Failed to write EDID value, ret=%d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void ptn3460_pre_enable(struct drm_bridge *bridge)
+{
+ struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
+ int ret;
+
+ if (ptn_bridge->enabled)
+ return;
+
+ gpiod_set_value(ptn_bridge->gpio_pd_n, 1);
+
+ gpiod_set_value(ptn_bridge->gpio_rst_n, 0);
+ usleep_range(10, 20);
+ gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
+
+ /*
+ * There's a bug in the PTN chip where it falsely asserts hotplug before
+ * it is fully functional. We're forced to wait for the maximum start up
+ * time specified in the chip's datasheet to make sure we're really up.
+ */
+ msleep(90);
+
+ ret = ptn3460_select_edid(ptn_bridge);
+ if (ret)
+ DRM_ERROR("Select EDID failed ret=%d\n", ret);
+
+ ptn_bridge->enabled = true;
+}
+
+static void ptn3460_disable(struct drm_bridge *bridge)
+{
+ struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
+
+ if (!ptn_bridge->enabled)
+ return;
+
+ ptn_bridge->enabled = false;
+
+ gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
+ gpiod_set_value(ptn_bridge->gpio_pd_n, 0);
+}
+
+
+static struct edid *ptn3460_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
+ bool power_off;
+ u8 *edid;
+ int ret;
+
+ power_off = !ptn_bridge->enabled;
+ ptn3460_pre_enable(&ptn_bridge->bridge);
+
+ edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
+ if (!edid) {
+ DRM_ERROR("Failed to allocate EDID\n");
+ goto out;
+ }
+
+ ret = ptn3460_read_bytes(ptn_bridge, PTN3460_EDID_ADDR, edid,
+ EDID_LENGTH);
+ if (ret) {
+ kfree(edid);
+ edid = NULL;
+ goto out;
+ }
+
+out:
+ if (power_off)
+ ptn3460_disable(&ptn_bridge->bridge);
+
+ return (struct edid *)edid;
+}
+
+static int ptn3460_connector_get_modes(struct drm_connector *connector)
+{
+ struct ptn3460_bridge *ptn_bridge = connector_to_ptn3460(connector);
+ struct edid *edid;
+ int num_modes;
+
+ edid = ptn3460_get_edid(&ptn_bridge->bridge, connector);
+ drm_connector_update_edid_property(connector, edid);
+ num_modes = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+
+ return num_modes;
+}
+
+static const struct drm_connector_helper_funcs ptn3460_connector_helper_funcs = {
+ .get_modes = ptn3460_connector_get_modes,
+};
+
+static const struct drm_connector_funcs ptn3460_connector_funcs = {
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int ptn3460_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
+ int ret;
+
+ /* Let this driver create connector if requested */
+ ret = drm_bridge_attach(bridge->encoder, ptn_bridge->panel_bridge,
+ bridge, flags | DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+ if (ret < 0)
+ return ret;
+
+ if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
+ return 0;
+
+ if (!bridge->encoder) {
+ DRM_ERROR("Parent encoder object not found");
+ return -ENODEV;
+ }
+
+ ptn_bridge->connector.polled = DRM_CONNECTOR_POLL_HPD;
+ ret = drm_connector_init(bridge->dev, &ptn_bridge->connector,
+ &ptn3460_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
+ if (ret) {
+ DRM_ERROR("Failed to initialize connector with drm\n");
+ return ret;
+ }
+ drm_connector_helper_add(&ptn_bridge->connector,
+ &ptn3460_connector_helper_funcs);
+ drm_connector_register(&ptn_bridge->connector);
+ drm_connector_attach_encoder(&ptn_bridge->connector,
+ bridge->encoder);
+
+ drm_helper_hpd_irq_event(ptn_bridge->connector.dev);
+
+ return ret;
+}
+
+static const struct drm_bridge_funcs ptn3460_bridge_funcs = {
+ .pre_enable = ptn3460_pre_enable,
+ .disable = ptn3460_disable,
+ .attach = ptn3460_bridge_attach,
+ .get_edid = ptn3460_get_edid,
+};
+
+static int ptn3460_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct ptn3460_bridge *ptn_bridge;
+ struct drm_bridge *panel_bridge;
+ int ret;
+
+ ptn_bridge = devm_kzalloc(dev, sizeof(*ptn_bridge), GFP_KERNEL);
+ if (!ptn_bridge) {
+ return -ENOMEM;
+ }
+
+ panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 0, 0);
+ if (IS_ERR(panel_bridge))
+ return PTR_ERR(panel_bridge);
+
+ ptn_bridge->panel_bridge = panel_bridge;
+ ptn_bridge->client = client;
+
+ ptn_bridge->gpio_pd_n = devm_gpiod_get(&client->dev, "powerdown",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(ptn_bridge->gpio_pd_n)) {
+ ret = PTR_ERR(ptn_bridge->gpio_pd_n);
+ dev_err(dev, "cannot get gpio_pd_n %d\n", ret);
+ return ret;
+ }
+
+ /*
+ * Request the reset pin low to avoid the bridge being
+ * initialized prematurely
+ */
+ ptn_bridge->gpio_rst_n = devm_gpiod_get(&client->dev, "reset",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(ptn_bridge->gpio_rst_n)) {
+ ret = PTR_ERR(ptn_bridge->gpio_rst_n);
+ DRM_ERROR("cannot get gpio_rst_n %d\n", ret);
+ return ret;
+ }
+
+ ret = of_property_read_u32(dev->of_node, "edid-emulation",
+ &ptn_bridge->edid_emulation);
+ if (ret) {
+ dev_err(dev, "Can't read EDID emulation value\n");
+ return ret;
+ }
+
+ ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs;
+ ptn_bridge->bridge.ops = DRM_BRIDGE_OP_EDID;
+ ptn_bridge->bridge.type = DRM_MODE_CONNECTOR_LVDS;
+ ptn_bridge->bridge.of_node = dev->of_node;
+ drm_bridge_add(&ptn_bridge->bridge);
+
+ i2c_set_clientdata(client, ptn_bridge);
+
+ return 0;
+}
+
+static void ptn3460_remove(struct i2c_client *client)
+{
+ struct ptn3460_bridge *ptn_bridge = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&ptn_bridge->bridge);
+}
+
+static const struct i2c_device_id ptn3460_i2c_table[] = {
+ {"ptn3460", 0},
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, ptn3460_i2c_table);
+
+static const struct of_device_id ptn3460_match[] = {
+ { .compatible = "nxp,ptn3460" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ptn3460_match);
+
+static struct i2c_driver ptn3460_driver = {
+ .id_table = ptn3460_i2c_table,
+ .probe = ptn3460_probe,
+ .remove = ptn3460_remove,
+ .driver = {
+ .name = "nxp,ptn3460",
+ .of_match_table = ptn3460_match,
+ },
+};
+module_i2c_driver(ptn3460_driver);
+
+MODULE_AUTHOR("Sean Paul <seanpaul@chromium.org>");
+MODULE_DESCRIPTION("NXP ptn3460 eDP-LVDS converter driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c
new file mode 100644
index 000000000..216af76d0
--- /dev/null
+++ b/drivers/gpu/drm/bridge/panel.c
@@ -0,0 +1,497 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2016 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ * Copyright (C) 2017 Broadcom
+ */
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_managed.h>
+#include <drm/drm_modeset_helper_vtables.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+struct panel_bridge {
+ struct drm_bridge bridge;
+ struct drm_connector connector;
+ struct drm_panel *panel;
+ u32 connector_type;
+};
+
+static inline struct panel_bridge *
+drm_bridge_to_panel_bridge(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct panel_bridge, bridge);
+}
+
+static inline struct panel_bridge *
+drm_connector_to_panel_bridge(struct drm_connector *connector)
+{
+ return container_of(connector, struct panel_bridge, connector);
+}
+
+static int panel_bridge_connector_get_modes(struct drm_connector *connector)
+{
+ struct panel_bridge *panel_bridge =
+ drm_connector_to_panel_bridge(connector);
+
+ return drm_panel_get_modes(panel_bridge->panel, connector);
+}
+
+static const struct drm_connector_helper_funcs
+panel_bridge_connector_helper_funcs = {
+ .get_modes = panel_bridge_connector_get_modes,
+};
+
+static const struct drm_connector_funcs panel_bridge_connector_funcs = {
+ .reset = drm_atomic_helper_connector_reset,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = drm_connector_cleanup,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int panel_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
+ struct drm_connector *connector = &panel_bridge->connector;
+ int ret;
+
+ if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
+ return 0;
+
+ if (!bridge->encoder) {
+ DRM_ERROR("Missing encoder\n");
+ return -ENODEV;
+ }
+
+ drm_connector_helper_add(connector,
+ &panel_bridge_connector_helper_funcs);
+
+ ret = drm_connector_init(bridge->dev, connector,
+ &panel_bridge_connector_funcs,
+ panel_bridge->connector_type);
+ if (ret) {
+ DRM_ERROR("Failed to initialize connector\n");
+ return ret;
+ }
+
+ drm_connector_attach_encoder(&panel_bridge->connector,
+ bridge->encoder);
+
+ if (bridge->dev->registered) {
+ if (connector->funcs->reset)
+ connector->funcs->reset(connector);
+ drm_connector_register(connector);
+ }
+
+ return 0;
+}
+
+static void panel_bridge_detach(struct drm_bridge *bridge)
+{
+ struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
+ struct drm_connector *connector = &panel_bridge->connector;
+
+ /*
+ * Cleanup the connector if we know it was initialized.
+ *
+ * FIXME: This wouldn't be needed if the panel_bridge structure was
+ * allocated with drmm_kzalloc(). This might be tricky since the
+ * drm_device pointer can only be retrieved when the bridge is attached.
+ */
+ if (connector->dev)
+ drm_connector_cleanup(connector);
+}
+
+static void panel_bridge_pre_enable(struct drm_bridge *bridge)
+{
+ struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
+
+ drm_panel_prepare(panel_bridge->panel);
+}
+
+static void panel_bridge_enable(struct drm_bridge *bridge)
+{
+ struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
+
+ drm_panel_enable(panel_bridge->panel);
+}
+
+static void panel_bridge_disable(struct drm_bridge *bridge)
+{
+ struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
+
+ drm_panel_disable(panel_bridge->panel);
+}
+
+static void panel_bridge_post_disable(struct drm_bridge *bridge)
+{
+ struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
+
+ drm_panel_unprepare(panel_bridge->panel);
+}
+
+static int panel_bridge_get_modes(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
+
+ return drm_panel_get_modes(panel_bridge->panel, connector);
+}
+
+static void panel_bridge_debugfs_init(struct drm_bridge *bridge,
+ struct dentry *root)
+{
+ struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge);
+ struct drm_panel *panel = panel_bridge->panel;
+
+ root = debugfs_create_dir("panel", root);
+ if (panel->funcs->debugfs_init)
+ panel->funcs->debugfs_init(panel, root);
+}
+
+static const struct drm_bridge_funcs panel_bridge_bridge_funcs = {
+ .attach = panel_bridge_attach,
+ .detach = panel_bridge_detach,
+ .pre_enable = panel_bridge_pre_enable,
+ .enable = panel_bridge_enable,
+ .disable = panel_bridge_disable,
+ .post_disable = panel_bridge_post_disable,
+ .get_modes = panel_bridge_get_modes,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_get_input_bus_fmts = drm_atomic_helper_bridge_propagate_bus_fmt,
+ .debugfs_init = panel_bridge_debugfs_init,
+};
+
+/**
+ * drm_bridge_is_panel - Checks if a drm_bridge is a panel_bridge.
+ *
+ * @bridge: The drm_bridge to be checked.
+ *
+ * Returns true if the bridge is a panel bridge, or false otherwise.
+ */
+bool drm_bridge_is_panel(const struct drm_bridge *bridge)
+{
+ return bridge->funcs == &panel_bridge_bridge_funcs;
+}
+EXPORT_SYMBOL(drm_bridge_is_panel);
+
+/**
+ * drm_panel_bridge_add - Creates a &drm_bridge and &drm_connector that
+ * just calls the appropriate functions from &drm_panel.
+ *
+ * @panel: The drm_panel being wrapped. Must be non-NULL.
+ *
+ * For drivers converting from directly using drm_panel: The expected
+ * usage pattern is that during either encoder module probe or DSI
+ * host attach, a drm_panel will be looked up through
+ * drm_of_find_panel_or_bridge(). drm_panel_bridge_add() is used to
+ * wrap that panel in the new bridge, and the result can then be
+ * passed to drm_bridge_attach(). The drm_panel_prepare() and related
+ * functions can be dropped from the encoder driver (they're now
+ * called by the KMS helpers before calling into the encoder), along
+ * with connector creation. When done with the bridge (after
+ * drm_mode_config_cleanup() if the bridge has already been attached), then
+ * drm_panel_bridge_remove() to free it.
+ *
+ * The connector type is set to @panel->connector_type, which must be set to a
+ * known type. Calling this function with a panel whose connector type is
+ * DRM_MODE_CONNECTOR_Unknown will return ERR_PTR(-EINVAL).
+ *
+ * See devm_drm_panel_bridge_add() for an automatically managed version of this
+ * function.
+ */
+struct drm_bridge *drm_panel_bridge_add(struct drm_panel *panel)
+{
+ if (WARN_ON(panel->connector_type == DRM_MODE_CONNECTOR_Unknown))
+ return ERR_PTR(-EINVAL);
+
+ return drm_panel_bridge_add_typed(panel, panel->connector_type);
+}
+EXPORT_SYMBOL(drm_panel_bridge_add);
+
+/**
+ * drm_panel_bridge_add_typed - Creates a &drm_bridge and &drm_connector with
+ * an explicit connector type.
+ * @panel: The drm_panel being wrapped. Must be non-NULL.
+ * @connector_type: The connector type (DRM_MODE_CONNECTOR_*)
+ *
+ * This is just like drm_panel_bridge_add(), but forces the connector type to
+ * @connector_type instead of infering it from the panel.
+ *
+ * This function is deprecated and should not be used in new drivers. Use
+ * drm_panel_bridge_add() instead, and fix panel drivers as necessary if they
+ * don't report a connector type.
+ */
+struct drm_bridge *drm_panel_bridge_add_typed(struct drm_panel *panel,
+ u32 connector_type)
+{
+ struct panel_bridge *panel_bridge;
+
+ if (!panel)
+ return ERR_PTR(-EINVAL);
+
+ panel_bridge = devm_kzalloc(panel->dev, sizeof(*panel_bridge),
+ GFP_KERNEL);
+ if (!panel_bridge)
+ return ERR_PTR(-ENOMEM);
+
+ panel_bridge->connector_type = connector_type;
+ panel_bridge->panel = panel;
+
+ panel_bridge->bridge.funcs = &panel_bridge_bridge_funcs;
+#ifdef CONFIG_OF
+ panel_bridge->bridge.of_node = panel->dev->of_node;
+#endif
+ panel_bridge->bridge.ops = DRM_BRIDGE_OP_MODES;
+ panel_bridge->bridge.type = connector_type;
+
+ drm_bridge_add(&panel_bridge->bridge);
+
+ return &panel_bridge->bridge;
+}
+EXPORT_SYMBOL(drm_panel_bridge_add_typed);
+
+/**
+ * drm_panel_bridge_remove - Unregisters and frees a drm_bridge
+ * created by drm_panel_bridge_add().
+ *
+ * @bridge: The drm_bridge being freed.
+ */
+void drm_panel_bridge_remove(struct drm_bridge *bridge)
+{
+ struct panel_bridge *panel_bridge;
+
+ if (!bridge)
+ return;
+
+ if (bridge->funcs != &panel_bridge_bridge_funcs)
+ return;
+
+ panel_bridge = drm_bridge_to_panel_bridge(bridge);
+
+ drm_bridge_remove(bridge);
+ devm_kfree(panel_bridge->panel->dev, bridge);
+}
+EXPORT_SYMBOL(drm_panel_bridge_remove);
+
+/**
+ * drm_panel_bridge_set_orientation - Set the connector's panel orientation
+ * from the bridge that can be transformed to panel bridge.
+ *
+ * @connector: The connector to be set panel orientation.
+ * @bridge: The drm_bridge to be transformed to panel bridge.
+ *
+ * Returns 0 on success, negative errno on failure.
+ */
+int drm_panel_bridge_set_orientation(struct drm_connector *connector,
+ struct drm_bridge *bridge)
+{
+ struct panel_bridge *panel_bridge;
+
+ panel_bridge = drm_bridge_to_panel_bridge(bridge);
+
+ return drm_connector_set_orientation_from_panel(connector,
+ panel_bridge->panel);
+}
+EXPORT_SYMBOL(drm_panel_bridge_set_orientation);
+
+static void devm_drm_panel_bridge_release(struct device *dev, void *res)
+{
+ struct drm_bridge **bridge = res;
+
+ drm_panel_bridge_remove(*bridge);
+}
+
+/**
+ * devm_drm_panel_bridge_add - Creates a managed &drm_bridge and &drm_connector
+ * that just calls the appropriate functions from &drm_panel.
+ * @dev: device to tie the bridge lifetime to
+ * @panel: The drm_panel being wrapped. Must be non-NULL.
+ *
+ * This is the managed version of drm_panel_bridge_add() which automatically
+ * calls drm_panel_bridge_remove() when @dev is unbound.
+ */
+struct drm_bridge *devm_drm_panel_bridge_add(struct device *dev,
+ struct drm_panel *panel)
+{
+ if (WARN_ON(panel->connector_type == DRM_MODE_CONNECTOR_Unknown))
+ return ERR_PTR(-EINVAL);
+
+ return devm_drm_panel_bridge_add_typed(dev, panel,
+ panel->connector_type);
+}
+EXPORT_SYMBOL(devm_drm_panel_bridge_add);
+
+/**
+ * devm_drm_panel_bridge_add_typed - Creates a managed &drm_bridge and
+ * &drm_connector with an explicit connector type.
+ * @dev: device to tie the bridge lifetime to
+ * @panel: The drm_panel being wrapped. Must be non-NULL.
+ * @connector_type: The connector type (DRM_MODE_CONNECTOR_*)
+ *
+ * This is just like devm_drm_panel_bridge_add(), but forces the connector type
+ * to @connector_type instead of infering it from the panel.
+ *
+ * This function is deprecated and should not be used in new drivers. Use
+ * devm_drm_panel_bridge_add() instead, and fix panel drivers as necessary if
+ * they don't report a connector type.
+ */
+struct drm_bridge *devm_drm_panel_bridge_add_typed(struct device *dev,
+ struct drm_panel *panel,
+ u32 connector_type)
+{
+ struct drm_bridge **ptr, *bridge;
+
+ ptr = devres_alloc(devm_drm_panel_bridge_release, sizeof(*ptr),
+ GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ bridge = drm_panel_bridge_add_typed(panel, connector_type);
+ if (!IS_ERR(bridge)) {
+ *ptr = bridge;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return bridge;
+}
+EXPORT_SYMBOL(devm_drm_panel_bridge_add_typed);
+
+static void drmm_drm_panel_bridge_release(struct drm_device *drm, void *ptr)
+{
+ struct drm_bridge *bridge = ptr;
+
+ drm_panel_bridge_remove(bridge);
+}
+
+/**
+ * drmm_panel_bridge_add - Creates a DRM-managed &drm_bridge and
+ * &drm_connector that just calls the
+ * appropriate functions from &drm_panel.
+ *
+ * @drm: DRM device to tie the bridge lifetime to
+ * @panel: The drm_panel being wrapped. Must be non-NULL.
+ *
+ * This is the DRM-managed version of drm_panel_bridge_add() which
+ * automatically calls drm_panel_bridge_remove() when @dev is cleaned
+ * up.
+ */
+struct drm_bridge *drmm_panel_bridge_add(struct drm_device *drm,
+ struct drm_panel *panel)
+{
+ struct drm_bridge *bridge;
+ int ret;
+
+ bridge = drm_panel_bridge_add_typed(panel, panel->connector_type);
+ if (IS_ERR(bridge))
+ return bridge;
+
+ ret = drmm_add_action_or_reset(drm, drmm_drm_panel_bridge_release,
+ bridge);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return bridge;
+}
+EXPORT_SYMBOL(drmm_panel_bridge_add);
+
+/**
+ * drm_panel_bridge_connector - return the connector for the panel bridge
+ * @bridge: The drm_bridge.
+ *
+ * drm_panel_bridge creates the connector.
+ * This function gives external access to the connector.
+ *
+ * Returns: Pointer to drm_connector
+ */
+struct drm_connector *drm_panel_bridge_connector(struct drm_bridge *bridge)
+{
+ struct panel_bridge *panel_bridge;
+
+ panel_bridge = drm_bridge_to_panel_bridge(bridge);
+
+ return &panel_bridge->connector;
+}
+EXPORT_SYMBOL(drm_panel_bridge_connector);
+
+#ifdef CONFIG_OF
+/**
+ * devm_drm_of_get_bridge - Return next bridge in the chain
+ * @dev: device to tie the bridge lifetime to
+ * @np: device tree node containing encoder output ports
+ * @port: port in the device tree node
+ * @endpoint: endpoint in the device tree node
+ *
+ * Given a DT node's port and endpoint number, finds the connected node
+ * and returns the associated bridge if any, or creates and returns a
+ * drm panel bridge instance if a panel is connected.
+ *
+ * Returns a pointer to the bridge if successful, or an error pointer
+ * otherwise.
+ */
+struct drm_bridge *devm_drm_of_get_bridge(struct device *dev,
+ struct device_node *np,
+ u32 port, u32 endpoint)
+{
+ struct drm_bridge *bridge;
+ struct drm_panel *panel;
+ int ret;
+
+ ret = drm_of_find_panel_or_bridge(np, port, endpoint,
+ &panel, &bridge);
+ if (ret)
+ return ERR_PTR(ret);
+
+ if (panel)
+ bridge = devm_drm_panel_bridge_add(dev, panel);
+
+ return bridge;
+}
+EXPORT_SYMBOL(devm_drm_of_get_bridge);
+
+/**
+ * drmm_of_get_bridge - Return next bridge in the chain
+ * @drm: device to tie the bridge lifetime to
+ * @np: device tree node containing encoder output ports
+ * @port: port in the device tree node
+ * @endpoint: endpoint in the device tree node
+ *
+ * Given a DT node's port and endpoint number, finds the connected node
+ * and returns the associated bridge if any, or creates and returns a
+ * drm panel bridge instance if a panel is connected.
+ *
+ * Returns a drmm managed pointer to the bridge if successful, or an error
+ * pointer otherwise.
+ */
+struct drm_bridge *drmm_of_get_bridge(struct drm_device *drm,
+ struct device_node *np,
+ u32 port, u32 endpoint)
+{
+ struct drm_bridge *bridge;
+ struct drm_panel *panel;
+ int ret;
+
+ ret = drm_of_find_panel_or_bridge(np, port, endpoint,
+ &panel, &bridge);
+ if (ret)
+ return ERR_PTR(ret);
+
+ if (panel)
+ bridge = drmm_panel_bridge_add(drm, panel);
+
+ return bridge;
+}
+EXPORT_SYMBOL(drmm_of_get_bridge);
+
+#endif
diff --git a/drivers/gpu/drm/bridge/parade-ps8622.c b/drivers/gpu/drm/bridge/parade-ps8622.c
new file mode 100644
index 000000000..309de8028
--- /dev/null
+++ b/drivers/gpu/drm/bridge/parade-ps8622.c
@@ -0,0 +1,552 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Parade PS8622 eDP/LVDS bridge driver
+ *
+ * Copyright (C) 2014 Google, Inc.
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/pm.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+/* Brightness scale on the Parade chip */
+#define PS8622_MAX_BRIGHTNESS 0xff
+
+/* Timings taken from the version 1.7 datasheet for the PS8622/PS8625 */
+#define PS8622_POWER_RISE_T1_MIN_US 10
+#define PS8622_POWER_RISE_T1_MAX_US 10000
+#define PS8622_RST_HIGH_T2_MIN_US 3000
+#define PS8622_RST_HIGH_T2_MAX_US 30000
+#define PS8622_PWMO_END_T12_MS 200
+#define PS8622_POWER_FALL_T16_MAX_US 10000
+#define PS8622_POWER_OFF_T17_MS 500
+
+#if ((PS8622_RST_HIGH_T2_MIN_US + PS8622_POWER_RISE_T1_MAX_US) > \
+ (PS8622_RST_HIGH_T2_MAX_US + PS8622_POWER_RISE_T1_MIN_US))
+#error "T2.min + T1.max must be less than T2.max + T1.min"
+#endif
+
+struct ps8622_bridge {
+ struct i2c_client *client;
+ struct drm_bridge bridge;
+ struct drm_bridge *panel_bridge;
+ struct regulator *v12;
+ struct backlight_device *bl;
+
+ struct gpio_desc *gpio_slp;
+ struct gpio_desc *gpio_rst;
+
+ u32 max_lane_count;
+ u32 lane_count;
+
+ bool enabled;
+};
+
+static inline struct ps8622_bridge *
+ bridge_to_ps8622(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct ps8622_bridge, bridge);
+}
+
+static int ps8622_set(struct i2c_client *client, u8 page, u8 reg, u8 val)
+{
+ int ret;
+ struct i2c_adapter *adap = client->adapter;
+ struct i2c_msg msg;
+ u8 data[] = {reg, val};
+
+ msg.addr = client->addr + page;
+ msg.flags = 0;
+ msg.len = sizeof(data);
+ msg.buf = data;
+
+ ret = i2c_transfer(adap, &msg, 1);
+ if (ret != 1)
+ pr_warn("PS8622 I2C write (0x%02x,0x%02x,0x%02x) failed: %d\n",
+ client->addr + page, reg, val, ret);
+ return !(ret == 1);
+}
+
+static int ps8622_send_config(struct ps8622_bridge *ps8622)
+{
+ struct i2c_client *cl = ps8622->client;
+ int err = 0;
+
+ /* HPD low */
+ err = ps8622_set(cl, 0x02, 0xa1, 0x01);
+ if (err)
+ goto error;
+
+ /* SW setting: [1:0] SW output 1.2V voltage is lower to 96% */
+ err = ps8622_set(cl, 0x04, 0x14, 0x01);
+ if (err)
+ goto error;
+
+ /* RCO SS setting: [5:4] = b01 0.5%, b10 1%, b11 1.5% */
+ err = ps8622_set(cl, 0x04, 0xe3, 0x20);
+ if (err)
+ goto error;
+
+ /* [7] RCO SS enable */
+ err = ps8622_set(cl, 0x04, 0xe2, 0x80);
+ if (err)
+ goto error;
+
+ /* RPHY Setting
+ * [3:2] CDR tune wait cycle before measure for fine tune
+ * b00: 1us b01: 0.5us b10:2us, b11: 4us
+ */
+ err = ps8622_set(cl, 0x04, 0x8a, 0x0c);
+ if (err)
+ goto error;
+
+ /* [3] RFD always on */
+ err = ps8622_set(cl, 0x04, 0x89, 0x08);
+ if (err)
+ goto error;
+
+ /* CTN lock in/out: 20000ppm/80000ppm. Lock out 2 times. */
+ err = ps8622_set(cl, 0x04, 0x71, 0x2d);
+ if (err)
+ goto error;
+
+ /* 2.7G CDR settings: NOF=40LSB for HBR CDR setting */
+ err = ps8622_set(cl, 0x04, 0x7d, 0x07);
+ if (err)
+ goto error;
+
+ /* [1:0] Fmin=+4bands */
+ err = ps8622_set(cl, 0x04, 0x7b, 0x00);
+ if (err)
+ goto error;
+
+ /* [7:5] DCO_FTRNG=+-40% */
+ err = ps8622_set(cl, 0x04, 0x7a, 0xfd);
+ if (err)
+ goto error;
+
+ /* 1.62G CDR settings: [5:2]NOF=64LSB [1:0]DCO scale is 2/5 */
+ err = ps8622_set(cl, 0x04, 0xc0, 0x12);
+ if (err)
+ goto error;
+
+ /* Gitune=-37% */
+ err = ps8622_set(cl, 0x04, 0xc1, 0x92);
+ if (err)
+ goto error;
+
+ /* Fbstep=100% */
+ err = ps8622_set(cl, 0x04, 0xc2, 0x1c);
+ if (err)
+ goto error;
+
+ /* [7] LOS signal disable */
+ err = ps8622_set(cl, 0x04, 0x32, 0x80);
+ if (err)
+ goto error;
+
+ /* RPIO Setting: [7:4] LVDS driver bias current : 75% (250mV swing) */
+ err = ps8622_set(cl, 0x04, 0x00, 0xb0);
+ if (err)
+ goto error;
+
+ /* [7:6] Right-bar GPIO output strength is 8mA */
+ err = ps8622_set(cl, 0x04, 0x15, 0x40);
+ if (err)
+ goto error;
+
+ /* EQ Training State Machine Setting, RCO calibration start */
+ err = ps8622_set(cl, 0x04, 0x54, 0x10);
+ if (err)
+ goto error;
+
+ /* Logic, needs more than 10 I2C command */
+ /* [4:0] MAX_LANE_COUNT set to max supported lanes */
+ err = ps8622_set(cl, 0x01, 0x02, 0x80 | ps8622->max_lane_count);
+ if (err)
+ goto error;
+
+ /* [4:0] LANE_COUNT_SET set to chosen lane count */
+ err = ps8622_set(cl, 0x01, 0x21, 0x80 | ps8622->lane_count);
+ if (err)
+ goto error;
+
+ err = ps8622_set(cl, 0x00, 0x52, 0x20);
+ if (err)
+ goto error;
+
+ /* HPD CP toggle enable */
+ err = ps8622_set(cl, 0x00, 0xf1, 0x03);
+ if (err)
+ goto error;
+
+ err = ps8622_set(cl, 0x00, 0x62, 0x41);
+ if (err)
+ goto error;
+
+ /* Counter number, add 1ms counter delay */
+ err = ps8622_set(cl, 0x00, 0xf6, 0x01);
+ if (err)
+ goto error;
+
+ /* [6]PWM function control by DPCD0040f[7], default is PWM block */
+ err = ps8622_set(cl, 0x00, 0x77, 0x06);
+ if (err)
+ goto error;
+
+ /* 04h Adjust VTotal toleranceto fix the 30Hz no display issue */
+ err = ps8622_set(cl, 0x00, 0x4c, 0x04);
+ if (err)
+ goto error;
+
+ /* DPCD00400='h00, Parade OUI ='h001cf8 */
+ err = ps8622_set(cl, 0x01, 0xc0, 0x00);
+ if (err)
+ goto error;
+
+ /* DPCD00401='h1c */
+ err = ps8622_set(cl, 0x01, 0xc1, 0x1c);
+ if (err)
+ goto error;
+
+ /* DPCD00402='hf8 */
+ err = ps8622_set(cl, 0x01, 0xc2, 0xf8);
+ if (err)
+ goto error;
+
+ /* DPCD403~408 = ASCII code, D2SLV5='h4432534c5635 */
+ err = ps8622_set(cl, 0x01, 0xc3, 0x44);
+ if (err)
+ goto error;
+
+ /* DPCD404 */
+ err = ps8622_set(cl, 0x01, 0xc4, 0x32);
+ if (err)
+ goto error;
+
+ /* DPCD405 */
+ err = ps8622_set(cl, 0x01, 0xc5, 0x53);
+ if (err)
+ goto error;
+
+ /* DPCD406 */
+ err = ps8622_set(cl, 0x01, 0xc6, 0x4c);
+ if (err)
+ goto error;
+
+ /* DPCD407 */
+ err = ps8622_set(cl, 0x01, 0xc7, 0x56);
+ if (err)
+ goto error;
+
+ /* DPCD408 */
+ err = ps8622_set(cl, 0x01, 0xc8, 0x35);
+ if (err)
+ goto error;
+
+ /* DPCD40A, Initial Code major revision '01' */
+ err = ps8622_set(cl, 0x01, 0xca, 0x01);
+ if (err)
+ goto error;
+
+ /* DPCD40B, Initial Code minor revision '05' */
+ err = ps8622_set(cl, 0x01, 0xcb, 0x05);
+ if (err)
+ goto error;
+
+
+ if (ps8622->bl) {
+ /* DPCD720, internal PWM */
+ err = ps8622_set(cl, 0x01, 0xa5, 0xa0);
+ if (err)
+ goto error;
+
+ /* FFh for 100% brightness, 0h for 0% brightness */
+ err = ps8622_set(cl, 0x01, 0xa7,
+ ps8622->bl->props.brightness);
+ if (err)
+ goto error;
+ } else {
+ /* DPCD720, external PWM */
+ err = ps8622_set(cl, 0x01, 0xa5, 0x80);
+ if (err)
+ goto error;
+ }
+
+ /* Set LVDS output as 6bit-VESA mapping, single LVDS channel */
+ err = ps8622_set(cl, 0x01, 0xcc, 0x13);
+ if (err)
+ goto error;
+
+ /* Enable SSC set by register */
+ err = ps8622_set(cl, 0x02, 0xb1, 0x20);
+ if (err)
+ goto error;
+
+ /* Set SSC enabled and +/-1% central spreading */
+ err = ps8622_set(cl, 0x04, 0x10, 0x16);
+ if (err)
+ goto error;
+
+ /* Logic end */
+ /* MPU Clock source: LC => RCO */
+ err = ps8622_set(cl, 0x04, 0x59, 0x60);
+ if (err)
+ goto error;
+
+ /* LC -> RCO */
+ err = ps8622_set(cl, 0x04, 0x54, 0x14);
+ if (err)
+ goto error;
+
+ /* HPD high */
+ err = ps8622_set(cl, 0x02, 0xa1, 0x91);
+
+error:
+ return err ? -EIO : 0;
+}
+
+static int ps8622_backlight_update(struct backlight_device *bl)
+{
+ struct ps8622_bridge *ps8622 = dev_get_drvdata(&bl->dev);
+ int ret, brightness = backlight_get_brightness(bl);
+
+ if (!ps8622->enabled)
+ return -EINVAL;
+
+ ret = ps8622_set(ps8622->client, 0x01, 0xa7, brightness);
+
+ return ret;
+}
+
+static const struct backlight_ops ps8622_backlight_ops = {
+ .update_status = ps8622_backlight_update,
+};
+
+static void ps8622_pre_enable(struct drm_bridge *bridge)
+{
+ struct ps8622_bridge *ps8622 = bridge_to_ps8622(bridge);
+ int ret;
+
+ if (ps8622->enabled)
+ return;
+
+ gpiod_set_value(ps8622->gpio_rst, 0);
+
+ if (ps8622->v12) {
+ ret = regulator_enable(ps8622->v12);
+ if (ret)
+ DRM_ERROR("fails to enable ps8622->v12");
+ }
+
+ gpiod_set_value(ps8622->gpio_slp, 1);
+
+ /*
+ * T1 is the range of time that it takes for the power to rise after we
+ * enable the lcd/ps8622 fet. T2 is the range of time in which the
+ * data sheet specifies we should deassert the reset pin.
+ *
+ * If it takes T1.max for the power to rise, we need to wait atleast
+ * T2.min before deasserting the reset pin. If it takes T1.min for the
+ * power to rise, we need to wait at most T2.max before deasserting the
+ * reset pin.
+ */
+ usleep_range(PS8622_RST_HIGH_T2_MIN_US + PS8622_POWER_RISE_T1_MAX_US,
+ PS8622_RST_HIGH_T2_MAX_US + PS8622_POWER_RISE_T1_MIN_US);
+
+ gpiod_set_value(ps8622->gpio_rst, 1);
+
+ /* wait 20ms after RST high */
+ usleep_range(20000, 30000);
+
+ ret = ps8622_send_config(ps8622);
+ if (ret) {
+ DRM_ERROR("Failed to send config to bridge (%d)\n", ret);
+ return;
+ }
+
+ ps8622->enabled = true;
+}
+
+static void ps8622_disable(struct drm_bridge *bridge)
+{
+ /* Delay after panel is disabled */
+ msleep(PS8622_PWMO_END_T12_MS);
+}
+
+static void ps8622_post_disable(struct drm_bridge *bridge)
+{
+ struct ps8622_bridge *ps8622 = bridge_to_ps8622(bridge);
+
+ if (!ps8622->enabled)
+ return;
+
+ ps8622->enabled = false;
+
+ /*
+ * This doesn't matter if the regulators are turned off, but something
+ * else might keep them on. In that case, we want to assert the slp gpio
+ * to lower power.
+ */
+ gpiod_set_value(ps8622->gpio_slp, 0);
+
+ if (ps8622->v12)
+ regulator_disable(ps8622->v12);
+
+ /*
+ * Sleep for at least the amount of time that it takes the power rail to
+ * fall to prevent asserting the rst gpio from doing anything.
+ */
+ usleep_range(PS8622_POWER_FALL_T16_MAX_US,
+ 2 * PS8622_POWER_FALL_T16_MAX_US);
+ gpiod_set_value(ps8622->gpio_rst, 0);
+
+ msleep(PS8622_POWER_OFF_T17_MS);
+}
+
+static int ps8622_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct ps8622_bridge *ps8622 = bridge_to_ps8622(bridge);
+
+ return drm_bridge_attach(ps8622->bridge.encoder, ps8622->panel_bridge,
+ &ps8622->bridge, flags);
+}
+
+static const struct drm_bridge_funcs ps8622_bridge_funcs = {
+ .pre_enable = ps8622_pre_enable,
+ .disable = ps8622_disable,
+ .post_disable = ps8622_post_disable,
+ .attach = ps8622_attach,
+};
+
+static const struct of_device_id ps8622_devices[] = {
+ {.compatible = "parade,ps8622",},
+ {.compatible = "parade,ps8625",},
+ {}
+};
+MODULE_DEVICE_TABLE(of, ps8622_devices);
+
+static int ps8622_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct ps8622_bridge *ps8622;
+ struct drm_bridge *panel_bridge;
+ int ret;
+
+ ps8622 = devm_kzalloc(dev, sizeof(*ps8622), GFP_KERNEL);
+ if (!ps8622)
+ return -ENOMEM;
+
+ panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 0, 0);
+ if (IS_ERR(panel_bridge))
+ return PTR_ERR(panel_bridge);
+
+ ps8622->panel_bridge = panel_bridge;
+ ps8622->client = client;
+
+ ps8622->v12 = devm_regulator_get(dev, "vdd12");
+ if (IS_ERR(ps8622->v12)) {
+ dev_info(dev, "no 1.2v regulator found for PS8622\n");
+ ps8622->v12 = NULL;
+ }
+
+ ps8622->gpio_slp = devm_gpiod_get(dev, "sleep", GPIOD_OUT_HIGH);
+ if (IS_ERR(ps8622->gpio_slp)) {
+ ret = PTR_ERR(ps8622->gpio_slp);
+ dev_err(dev, "cannot get gpio_slp %d\n", ret);
+ return ret;
+ }
+
+ /*
+ * Assert the reset pin high to avoid the bridge being
+ * initialized prematurely
+ */
+ ps8622->gpio_rst = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(ps8622->gpio_rst)) {
+ ret = PTR_ERR(ps8622->gpio_rst);
+ dev_err(dev, "cannot get gpio_rst %d\n", ret);
+ return ret;
+ }
+
+ ps8622->max_lane_count = id->driver_data;
+
+ if (of_property_read_u32(dev->of_node, "lane-count",
+ &ps8622->lane_count)) {
+ ps8622->lane_count = ps8622->max_lane_count;
+ } else if (ps8622->lane_count > ps8622->max_lane_count) {
+ dev_info(dev, "lane-count property is too high,"
+ "using max_lane_count\n");
+ ps8622->lane_count = ps8622->max_lane_count;
+ }
+
+ if (!of_find_property(dev->of_node, "use-external-pwm", NULL)) {
+ ps8622->bl = backlight_device_register("ps8622-backlight",
+ dev, ps8622, &ps8622_backlight_ops,
+ NULL);
+ if (IS_ERR(ps8622->bl)) {
+ DRM_ERROR("failed to register backlight\n");
+ ret = PTR_ERR(ps8622->bl);
+ ps8622->bl = NULL;
+ return ret;
+ }
+ ps8622->bl->props.max_brightness = PS8622_MAX_BRIGHTNESS;
+ ps8622->bl->props.brightness = PS8622_MAX_BRIGHTNESS;
+ }
+
+ ps8622->bridge.funcs = &ps8622_bridge_funcs;
+ ps8622->bridge.type = DRM_MODE_CONNECTOR_LVDS;
+ ps8622->bridge.of_node = dev->of_node;
+ drm_bridge_add(&ps8622->bridge);
+
+ i2c_set_clientdata(client, ps8622);
+
+ return 0;
+}
+
+static void ps8622_remove(struct i2c_client *client)
+{
+ struct ps8622_bridge *ps8622 = i2c_get_clientdata(client);
+
+ backlight_device_unregister(ps8622->bl);
+ drm_bridge_remove(&ps8622->bridge);
+}
+
+static const struct i2c_device_id ps8622_i2c_table[] = {
+ /* Device type, max_lane_count */
+ {"ps8622", 1},
+ {"ps8625", 2},
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, ps8622_i2c_table);
+
+static struct i2c_driver ps8622_driver = {
+ .id_table = ps8622_i2c_table,
+ .probe = ps8622_probe,
+ .remove = ps8622_remove,
+ .driver = {
+ .name = "ps8622",
+ .of_match_table = ps8622_devices,
+ },
+};
+module_i2c_driver(ps8622_driver);
+
+MODULE_AUTHOR("Vincent Palatin <vpalatin@chromium.org>");
+MODULE_DESCRIPTION("Parade ps8622/ps8625 eDP-LVDS converter driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
new file mode 100644
index 000000000..09737acc2
--- /dev/null
+++ b/drivers/gpu/drm/bridge/parade-ps8640.c
@@ -0,0 +1,799 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2016 MediaTek Inc.
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of_graph.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/display/drm_dp_aux_bus.h>
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+
+#define PAGE0_AUXCH_CFG3 0x76
+#define AUXCH_CFG3_RESET 0xff
+#define PAGE0_SWAUX_ADDR_7_0 0x7d
+#define PAGE0_SWAUX_ADDR_15_8 0x7e
+#define PAGE0_SWAUX_ADDR_23_16 0x7f
+#define SWAUX_ADDR_MASK GENMASK(19, 0)
+#define PAGE0_SWAUX_LENGTH 0x80
+#define SWAUX_LENGTH_MASK GENMASK(3, 0)
+#define SWAUX_NO_PAYLOAD BIT(7)
+#define PAGE0_SWAUX_WDATA 0x81
+#define PAGE0_SWAUX_RDATA 0x82
+#define PAGE0_SWAUX_CTRL 0x83
+#define SWAUX_SEND BIT(0)
+#define PAGE0_SWAUX_STATUS 0x84
+#define SWAUX_M_MASK GENMASK(4, 0)
+#define SWAUX_STATUS_MASK GENMASK(7, 5)
+#define SWAUX_STATUS_NACK (0x1 << 5)
+#define SWAUX_STATUS_DEFER (0x2 << 5)
+#define SWAUX_STATUS_ACKM (0x3 << 5)
+#define SWAUX_STATUS_INVALID (0x4 << 5)
+#define SWAUX_STATUS_I2C_NACK (0x5 << 5)
+#define SWAUX_STATUS_I2C_DEFER (0x6 << 5)
+#define SWAUX_STATUS_TIMEOUT (0x7 << 5)
+
+#define PAGE2_GPIO_H 0xa7
+#define PS_GPIO9 BIT(1)
+#define PAGE2_I2C_BYPASS 0xea
+#define I2C_BYPASS_EN 0xd0
+#define PAGE2_MCS_EN 0xf3
+#define MCS_EN BIT(0)
+
+#define PAGE3_SET_ADD 0xfe
+#define VDO_CTL_ADD 0x13
+#define VDO_DIS 0x18
+#define VDO_EN 0x1c
+
+#define NUM_MIPI_LANES 4
+
+#define COMMON_PS8640_REGMAP_CONFIG \
+ .reg_bits = 8, \
+ .val_bits = 8, \
+ .cache_type = REGCACHE_NONE
+
+/*
+ * PS8640 uses multiple addresses:
+ * page[0]: for DP control
+ * page[1]: for VIDEO Bridge
+ * page[2]: for control top
+ * page[3]: for DSI Link Control1
+ * page[4]: for MIPI Phy
+ * page[5]: for VPLL
+ * page[6]: for DSI Link Control2
+ * page[7]: for SPI ROM mapping
+ */
+enum page_addr_offset {
+ PAGE0_DP_CNTL = 0,
+ PAGE1_VDO_BDG,
+ PAGE2_TOP_CNTL,
+ PAGE3_DSI_CNTL1,
+ PAGE4_MIPI_PHY,
+ PAGE5_VPLL,
+ PAGE6_DSI_CNTL2,
+ PAGE7_SPI_CNTL,
+ MAX_DEVS
+};
+
+enum ps8640_vdo_control {
+ DISABLE = VDO_DIS,
+ ENABLE = VDO_EN,
+};
+
+struct ps8640 {
+ struct drm_bridge bridge;
+ struct drm_bridge *panel_bridge;
+ struct drm_dp_aux aux;
+ struct mipi_dsi_device *dsi;
+ struct i2c_client *page[MAX_DEVS];
+ struct regmap *regmap[MAX_DEVS];
+ struct regulator_bulk_data supplies[2];
+ struct gpio_desc *gpio_reset;
+ struct gpio_desc *gpio_powerdown;
+ struct device_link *link;
+ bool pre_enabled;
+ bool need_post_hpd_delay;
+ struct mutex aux_lock;
+};
+
+static const struct regmap_config ps8640_regmap_config[] = {
+ [PAGE0_DP_CNTL] = {
+ COMMON_PS8640_REGMAP_CONFIG,
+ .max_register = 0xbf,
+ },
+ [PAGE1_VDO_BDG] = {
+ COMMON_PS8640_REGMAP_CONFIG,
+ .max_register = 0xff,
+ },
+ [PAGE2_TOP_CNTL] = {
+ COMMON_PS8640_REGMAP_CONFIG,
+ .max_register = 0xff,
+ },
+ [PAGE3_DSI_CNTL1] = {
+ COMMON_PS8640_REGMAP_CONFIG,
+ .max_register = 0xff,
+ },
+ [PAGE4_MIPI_PHY] = {
+ COMMON_PS8640_REGMAP_CONFIG,
+ .max_register = 0xff,
+ },
+ [PAGE5_VPLL] = {
+ COMMON_PS8640_REGMAP_CONFIG,
+ .max_register = 0x7f,
+ },
+ [PAGE6_DSI_CNTL2] = {
+ COMMON_PS8640_REGMAP_CONFIG,
+ .max_register = 0xff,
+ },
+ [PAGE7_SPI_CNTL] = {
+ COMMON_PS8640_REGMAP_CONFIG,
+ .max_register = 0xff,
+ },
+};
+
+static inline struct ps8640 *bridge_to_ps8640(struct drm_bridge *e)
+{
+ return container_of(e, struct ps8640, bridge);
+}
+
+static inline struct ps8640 *aux_to_ps8640(struct drm_dp_aux *aux)
+{
+ return container_of(aux, struct ps8640, aux);
+}
+
+static bool ps8640_of_panel_on_aux_bus(struct device *dev)
+{
+ struct device_node *bus, *panel;
+
+ bus = of_get_child_by_name(dev->of_node, "aux-bus");
+ if (!bus)
+ return false;
+
+ panel = of_get_child_by_name(bus, "panel");
+ of_node_put(bus);
+ if (!panel)
+ return false;
+ of_node_put(panel);
+
+ return true;
+}
+
+static int _ps8640_wait_hpd_asserted(struct ps8640 *ps_bridge, unsigned long wait_us)
+{
+ struct regmap *map = ps_bridge->regmap[PAGE2_TOP_CNTL];
+ int status;
+ int ret;
+
+ /*
+ * Apparently something about the firmware in the chip signals that
+ * HPD goes high by reporting GPIO9 as high (even though HPD isn't
+ * actually connected to GPIO9).
+ */
+ ret = regmap_read_poll_timeout(map, PAGE2_GPIO_H, status,
+ status & PS_GPIO9, wait_us / 10, wait_us);
+
+ /*
+ * The first time we see HPD go high after a reset we delay an extra
+ * 50 ms. The best guess is that the MCU is doing "stuff" during this
+ * time (maybe talking to the panel) and we don't want to interrupt it.
+ *
+ * No locking is done around "need_post_hpd_delay". If we're here we
+ * know we're holding a PM Runtime reference and the only other place
+ * that touches this is PM Runtime resume.
+ */
+ if (!ret && ps_bridge->need_post_hpd_delay) {
+ ps_bridge->need_post_hpd_delay = false;
+ msleep(50);
+ }
+
+ return ret;
+}
+
+static int ps8640_wait_hpd_asserted(struct drm_dp_aux *aux, unsigned long wait_us)
+{
+ struct ps8640 *ps_bridge = aux_to_ps8640(aux);
+ struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;
+ int ret;
+
+ /*
+ * Note that this function is called by code that has already powered
+ * the panel. We have to power ourselves up but we don't need to worry
+ * about powering the panel.
+ */
+ pm_runtime_get_sync(dev);
+ ret = _ps8640_wait_hpd_asserted(ps_bridge, wait_us);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+
+ return ret;
+}
+
+static ssize_t ps8640_aux_transfer_msg(struct drm_dp_aux *aux,
+ struct drm_dp_aux_msg *msg)
+{
+ struct ps8640 *ps_bridge = aux_to_ps8640(aux);
+ struct regmap *map = ps_bridge->regmap[PAGE0_DP_CNTL];
+ struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;
+ unsigned int len = msg->size;
+ unsigned int data;
+ unsigned int base;
+ int ret;
+ u8 request = msg->request &
+ ~(DP_AUX_I2C_MOT | DP_AUX_I2C_WRITE_STATUS_UPDATE);
+ u8 *buf = msg->buffer;
+ u8 addr_len[PAGE0_SWAUX_LENGTH + 1 - PAGE0_SWAUX_ADDR_7_0];
+ u8 i;
+ bool is_native_aux = false;
+
+ if (len > DP_AUX_MAX_PAYLOAD_BYTES)
+ return -EINVAL;
+
+ if (msg->address & ~SWAUX_ADDR_MASK)
+ return -EINVAL;
+
+ switch (request) {
+ case DP_AUX_NATIVE_WRITE:
+ case DP_AUX_NATIVE_READ:
+ is_native_aux = true;
+ fallthrough;
+ case DP_AUX_I2C_WRITE:
+ case DP_AUX_I2C_READ:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = regmap_write(map, PAGE0_AUXCH_CFG3, AUXCH_CFG3_RESET);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "failed to write PAGE0_AUXCH_CFG3: %d\n",
+ ret);
+ return ret;
+ }
+
+ /* Assume it's good */
+ msg->reply = 0;
+
+ base = PAGE0_SWAUX_ADDR_7_0;
+ addr_len[PAGE0_SWAUX_ADDR_7_0 - base] = msg->address;
+ addr_len[PAGE0_SWAUX_ADDR_15_8 - base] = msg->address >> 8;
+ addr_len[PAGE0_SWAUX_ADDR_23_16 - base] = (msg->address >> 16) |
+ (msg->request << 4);
+ addr_len[PAGE0_SWAUX_LENGTH - base] = (len == 0) ? SWAUX_NO_PAYLOAD :
+ ((len - 1) & SWAUX_LENGTH_MASK);
+
+ regmap_bulk_write(map, PAGE0_SWAUX_ADDR_7_0, addr_len,
+ ARRAY_SIZE(addr_len));
+
+ if (len && (request == DP_AUX_NATIVE_WRITE ||
+ request == DP_AUX_I2C_WRITE)) {
+ /* Write to the internal FIFO buffer */
+ for (i = 0; i < len; i++) {
+ ret = regmap_write(map, PAGE0_SWAUX_WDATA, buf[i]);
+ if (ret) {
+ DRM_DEV_ERROR(dev,
+ "failed to write WDATA: %d\n",
+ ret);
+ return ret;
+ }
+ }
+ }
+
+ regmap_write(map, PAGE0_SWAUX_CTRL, SWAUX_SEND);
+
+ /* Zero delay loop because i2c transactions are slow already */
+ regmap_read_poll_timeout(map, PAGE0_SWAUX_CTRL, data,
+ !(data & SWAUX_SEND), 0, 50 * 1000);
+
+ regmap_read(map, PAGE0_SWAUX_STATUS, &data);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "failed to read PAGE0_SWAUX_STATUS: %d\n",
+ ret);
+ return ret;
+ }
+
+ switch (data & SWAUX_STATUS_MASK) {
+ /* Ignore the DEFER cases as they are already handled in hardware */
+ case SWAUX_STATUS_NACK:
+ case SWAUX_STATUS_I2C_NACK:
+ /*
+ * The programming guide is not clear about whether a I2C NACK
+ * would trigger SWAUX_STATUS_NACK or SWAUX_STATUS_I2C_NACK. So
+ * we handle both cases together.
+ */
+ if (is_native_aux)
+ msg->reply |= DP_AUX_NATIVE_REPLY_NACK;
+ else
+ msg->reply |= DP_AUX_I2C_REPLY_NACK;
+
+ fallthrough;
+ case SWAUX_STATUS_ACKM:
+ len = data & SWAUX_M_MASK;
+ break;
+ case SWAUX_STATUS_INVALID:
+ return -EOPNOTSUPP;
+ case SWAUX_STATUS_TIMEOUT:
+ return -ETIMEDOUT;
+ }
+
+ if (len && (request == DP_AUX_NATIVE_READ ||
+ request == DP_AUX_I2C_READ)) {
+ /* Read from the internal FIFO buffer */
+ for (i = 0; i < len; i++) {
+ ret = regmap_read(map, PAGE0_SWAUX_RDATA, &data);
+ if (ret) {
+ DRM_DEV_ERROR(dev,
+ "failed to read RDATA: %d\n",
+ ret);
+ return ret;
+ }
+
+ buf[i] = data;
+ }
+ }
+
+ return len;
+}
+
+static ssize_t ps8640_aux_transfer(struct drm_dp_aux *aux,
+ struct drm_dp_aux_msg *msg)
+{
+ struct ps8640 *ps_bridge = aux_to_ps8640(aux);
+ struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;
+ int ret;
+
+ mutex_lock(&ps_bridge->aux_lock);
+ pm_runtime_get_sync(dev);
+ ret = _ps8640_wait_hpd_asserted(ps_bridge, 200 * 1000);
+ if (ret) {
+ pm_runtime_put_sync_suspend(dev);
+ goto exit;
+ }
+ ret = ps8640_aux_transfer_msg(aux, msg);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+
+exit:
+ mutex_unlock(&ps_bridge->aux_lock);
+
+ return ret;
+}
+
+static void ps8640_bridge_vdo_control(struct ps8640 *ps_bridge,
+ const enum ps8640_vdo_control ctrl)
+{
+ struct regmap *map = ps_bridge->regmap[PAGE3_DSI_CNTL1];
+ struct device *dev = &ps_bridge->page[PAGE3_DSI_CNTL1]->dev;
+ u8 vdo_ctrl_buf[] = { VDO_CTL_ADD, ctrl };
+ int ret;
+
+ ret = regmap_bulk_write(map, PAGE3_SET_ADD,
+ vdo_ctrl_buf, sizeof(vdo_ctrl_buf));
+
+ if (ret < 0)
+ dev_err(dev, "failed to %sable VDO: %d\n",
+ ctrl == ENABLE ? "en" : "dis", ret);
+}
+
+static int __maybe_unused ps8640_resume(struct device *dev)
+{
+ struct ps8640 *ps_bridge = dev_get_drvdata(dev);
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(ps_bridge->supplies),
+ ps_bridge->supplies);
+ if (ret < 0) {
+ dev_err(dev, "cannot enable regulators %d\n", ret);
+ return ret;
+ }
+
+ gpiod_set_value(ps_bridge->gpio_powerdown, 0);
+ gpiod_set_value(ps_bridge->gpio_reset, 1);
+ usleep_range(2000, 2500);
+ gpiod_set_value(ps_bridge->gpio_reset, 0);
+ /* Double reset for T4 and T5 */
+ msleep(50);
+ gpiod_set_value(ps_bridge->gpio_reset, 1);
+ msleep(50);
+ gpiod_set_value(ps_bridge->gpio_reset, 0);
+
+ /* We just reset things, so we need a delay after the first HPD */
+ ps_bridge->need_post_hpd_delay = true;
+
+ /*
+ * Mystery 200 ms delay for the "MCU to be ready". It's unclear if
+ * this is truly necessary since the MCU will already signal that
+ * things are "good to go" by signaling HPD on "gpio 9". See
+ * _ps8640_wait_hpd_asserted(). For now we'll keep this mystery delay
+ * just in case.
+ */
+ msleep(200);
+
+ return 0;
+}
+
+static int __maybe_unused ps8640_suspend(struct device *dev)
+{
+ struct ps8640 *ps_bridge = dev_get_drvdata(dev);
+ int ret;
+
+ gpiod_set_value(ps_bridge->gpio_reset, 1);
+ gpiod_set_value(ps_bridge->gpio_powerdown, 1);
+ ret = regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies),
+ ps_bridge->supplies);
+ if (ret < 0)
+ dev_err(dev, "cannot disable regulators %d\n", ret);
+
+ return ret;
+}
+
+static const struct dev_pm_ops ps8640_pm_ops = {
+ SET_RUNTIME_PM_OPS(ps8640_suspend, ps8640_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+};
+
+static void ps8640_pre_enable(struct drm_bridge *bridge)
+{
+ struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
+ struct regmap *map = ps_bridge->regmap[PAGE2_TOP_CNTL];
+ struct device *dev = &ps_bridge->page[PAGE0_DP_CNTL]->dev;
+ int ret;
+
+ pm_runtime_get_sync(dev);
+ ret = _ps8640_wait_hpd_asserted(ps_bridge, 200 * 1000);
+ if (ret < 0)
+ dev_warn(dev, "HPD didn't go high: %d\n", ret);
+
+ /*
+ * The Manufacturer Command Set (MCS) is a device dependent interface
+ * intended for factory programming of the display module default
+ * parameters. Once the display module is configured, the MCS shall be
+ * disabled by the manufacturer. Once disabled, all MCS commands are
+ * ignored by the display interface.
+ */
+
+ ret = regmap_update_bits(map, PAGE2_MCS_EN, MCS_EN, 0);
+ if (ret < 0)
+ dev_warn(dev, "failed write PAGE2_MCS_EN: %d\n", ret);
+
+ /* Switch access edp panel's edid through i2c */
+ ret = regmap_write(map, PAGE2_I2C_BYPASS, I2C_BYPASS_EN);
+ if (ret < 0)
+ dev_warn(dev, "failed write PAGE2_MCS_EN: %d\n", ret);
+
+ ps8640_bridge_vdo_control(ps_bridge, ENABLE);
+
+ ps_bridge->pre_enabled = true;
+}
+
+static void ps8640_post_disable(struct drm_bridge *bridge)
+{
+ struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
+
+ ps_bridge->pre_enabled = false;
+
+ ps8640_bridge_vdo_control(ps_bridge, DISABLE);
+
+ /*
+ * The bridge seems to expect everything to be power cycled at the
+ * disable process, so grab a lock here to make sure
+ * ps8640_aux_transfer() is not holding a runtime PM reference and
+ * preventing the bridge from suspend.
+ */
+ mutex_lock(&ps_bridge->aux_lock);
+
+ pm_runtime_put_sync_suspend(&ps_bridge->page[PAGE0_DP_CNTL]->dev);
+
+ mutex_unlock(&ps_bridge->aux_lock);
+}
+
+static int ps8640_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
+ struct device *dev = &ps_bridge->page[0]->dev;
+ int ret;
+
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
+ return -EINVAL;
+
+ ps_bridge->aux.drm_dev = bridge->dev;
+ ret = drm_dp_aux_register(&ps_bridge->aux);
+ if (ret) {
+ dev_err(dev, "failed to register DP AUX channel: %d\n", ret);
+ return ret;
+ }
+
+ ps_bridge->link = device_link_add(bridge->dev->dev, dev, DL_FLAG_STATELESS);
+ if (!ps_bridge->link) {
+ dev_err(dev, "failed to create device link");
+ ret = -EINVAL;
+ goto err_devlink;
+ }
+
+ /* Attach the panel-bridge to the dsi bridge */
+ ret = drm_bridge_attach(bridge->encoder, ps_bridge->panel_bridge,
+ &ps_bridge->bridge, flags);
+ if (ret)
+ goto err_bridge_attach;
+
+ return 0;
+
+err_bridge_attach:
+ device_link_del(ps_bridge->link);
+err_devlink:
+ drm_dp_aux_unregister(&ps_bridge->aux);
+
+ return ret;
+}
+
+static void ps8640_bridge_detach(struct drm_bridge *bridge)
+{
+ struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
+
+ drm_dp_aux_unregister(&ps_bridge->aux);
+ if (ps_bridge->link)
+ device_link_del(ps_bridge->link);
+}
+
+static struct edid *ps8640_bridge_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
+ bool poweroff = !ps_bridge->pre_enabled;
+ struct edid *edid;
+
+ /*
+ * When we end calling get_edid() triggered by an ioctl, i.e
+ *
+ * drm_mode_getconnector (ioctl)
+ * -> drm_helper_probe_single_connector_modes
+ * -> drm_bridge_connector_get_modes
+ * -> ps8640_bridge_get_edid
+ *
+ * We need to make sure that what we need is enabled before reading
+ * EDID, for this chip, we need to do a full poweron, otherwise it will
+ * fail.
+ */
+ drm_bridge_chain_pre_enable(bridge);
+
+ edid = drm_get_edid(connector,
+ ps_bridge->page[PAGE0_DP_CNTL]->adapter);
+
+ /*
+ * If we call the get_edid() function without having enabled the chip
+ * before, return the chip to its original power state.
+ */
+ if (poweroff)
+ drm_bridge_chain_post_disable(bridge);
+
+ return edid;
+}
+
+static void ps8640_runtime_disable(void *data)
+{
+ pm_runtime_dont_use_autosuspend(data);
+ pm_runtime_disable(data);
+}
+
+static const struct drm_bridge_funcs ps8640_bridge_funcs = {
+ .attach = ps8640_bridge_attach,
+ .detach = ps8640_bridge_detach,
+ .get_edid = ps8640_bridge_get_edid,
+ .post_disable = ps8640_post_disable,
+ .pre_enable = ps8640_pre_enable,
+};
+
+static int ps8640_bridge_get_dsi_resources(struct device *dev, struct ps8640 *ps_bridge)
+{
+ struct device_node *in_ep, *dsi_node;
+ struct mipi_dsi_device *dsi;
+ struct mipi_dsi_host *host;
+ const struct mipi_dsi_device_info info = { .type = "ps8640",
+ .channel = 0,
+ .node = NULL,
+ };
+
+ /* port@0 is ps8640 dsi input port */
+ in_ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
+ if (!in_ep)
+ return -ENODEV;
+
+ dsi_node = of_graph_get_remote_port_parent(in_ep);
+ of_node_put(in_ep);
+ if (!dsi_node)
+ return -ENODEV;
+
+ host = of_find_mipi_dsi_host_by_node(dsi_node);
+ of_node_put(dsi_node);
+ if (!host)
+ return -EPROBE_DEFER;
+
+ dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
+ if (IS_ERR(dsi)) {
+ dev_err(dev, "failed to create dsi device\n");
+ return PTR_ERR(dsi);
+ }
+
+ ps_bridge->dsi = dsi;
+
+ dsi->host = host;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
+ MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->lanes = NUM_MIPI_LANES;
+
+ return 0;
+}
+
+static int ps8640_bridge_link_panel(struct drm_dp_aux *aux)
+{
+ struct ps8640 *ps_bridge = aux_to_ps8640(aux);
+ struct device *dev = aux->dev;
+ struct device_node *np = dev->of_node;
+ int ret;
+
+ /*
+ * NOTE about returning -EPROBE_DEFER from this function: if we
+ * return an error (most relevant to -EPROBE_DEFER) it will only
+ * be passed out to ps8640_probe() if it called this directly (AKA the
+ * panel isn't under the "aux-bus" node). That should be fine because
+ * if the panel is under "aux-bus" it's guaranteed to have probed by
+ * the time this function has been called.
+ */
+
+ /* port@1 is ps8640 output port */
+ ps_bridge->panel_bridge = devm_drm_of_get_bridge(dev, np, 1, 0);
+ if (IS_ERR(ps_bridge->panel_bridge))
+ return PTR_ERR(ps_bridge->panel_bridge);
+
+ ret = devm_drm_bridge_add(dev, &ps_bridge->bridge);
+ if (ret)
+ return ret;
+
+ return devm_mipi_dsi_attach(dev, ps_bridge->dsi);
+}
+
+static int ps8640_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct ps8640 *ps_bridge;
+ int ret;
+ u32 i;
+
+ ps_bridge = devm_kzalloc(dev, sizeof(*ps_bridge), GFP_KERNEL);
+ if (!ps_bridge)
+ return -ENOMEM;
+
+ mutex_init(&ps_bridge->aux_lock);
+
+ ps_bridge->supplies[0].supply = "vdd12";
+ ps_bridge->supplies[1].supply = "vdd33";
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ps_bridge->supplies),
+ ps_bridge->supplies);
+ if (ret)
+ return ret;
+
+ ps_bridge->gpio_powerdown = devm_gpiod_get(&client->dev, "powerdown",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(ps_bridge->gpio_powerdown))
+ return PTR_ERR(ps_bridge->gpio_powerdown);
+
+ /*
+ * Assert the reset to avoid the bridge being initialized prematurely
+ */
+ ps_bridge->gpio_reset = devm_gpiod_get(&client->dev, "reset",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(ps_bridge->gpio_reset))
+ return PTR_ERR(ps_bridge->gpio_reset);
+
+ ps_bridge->bridge.funcs = &ps8640_bridge_funcs;
+ ps_bridge->bridge.of_node = dev->of_node;
+ ps_bridge->bridge.type = DRM_MODE_CONNECTOR_eDP;
+
+ /*
+ * In the device tree, if panel is listed under aux-bus of the bridge
+ * node, panel driver should be able to retrieve EDID by itself using
+ * aux-bus. So let's not set DRM_BRIDGE_OP_EDID here.
+ */
+ if (!ps8640_of_panel_on_aux_bus(&client->dev))
+ ps_bridge->bridge.ops = DRM_BRIDGE_OP_EDID;
+
+ /*
+ * Get MIPI DSI resources early. These can return -EPROBE_DEFER so
+ * we want to get them out of the way sooner.
+ */
+ ret = ps8640_bridge_get_dsi_resources(&client->dev, ps_bridge);
+ if (ret)
+ return ret;
+
+ ps_bridge->page[PAGE0_DP_CNTL] = client;
+
+ ps_bridge->regmap[PAGE0_DP_CNTL] = devm_regmap_init_i2c(client, ps8640_regmap_config);
+ if (IS_ERR(ps_bridge->regmap[PAGE0_DP_CNTL]))
+ return PTR_ERR(ps_bridge->regmap[PAGE0_DP_CNTL]);
+
+ for (i = 1; i < ARRAY_SIZE(ps_bridge->page); i++) {
+ ps_bridge->page[i] = devm_i2c_new_dummy_device(&client->dev,
+ client->adapter,
+ client->addr + i);
+ if (IS_ERR(ps_bridge->page[i]))
+ return PTR_ERR(ps_bridge->page[i]);
+
+ ps_bridge->regmap[i] = devm_regmap_init_i2c(ps_bridge->page[i],
+ ps8640_regmap_config + i);
+ if (IS_ERR(ps_bridge->regmap[i]))
+ return PTR_ERR(ps_bridge->regmap[i]);
+ }
+
+ i2c_set_clientdata(client, ps_bridge);
+
+ ps_bridge->aux.name = "parade-ps8640-aux";
+ ps_bridge->aux.dev = dev;
+ ps_bridge->aux.transfer = ps8640_aux_transfer;
+ ps_bridge->aux.wait_hpd_asserted = ps8640_wait_hpd_asserted;
+ drm_dp_aux_init(&ps_bridge->aux);
+
+ pm_runtime_enable(dev);
+ /*
+ * Powering on ps8640 takes ~300ms. To avoid wasting time on power
+ * cycling ps8640 too often, set autosuspend_delay to 1000ms to ensure
+ * the bridge wouldn't suspend in between each _aux_transfer_msg() call
+ * during EDID read (~20ms in my experiment) and in between the last
+ * _aux_transfer_msg() call during EDID read and the _pre_enable() call
+ * (~100ms in my experiment).
+ */
+ pm_runtime_set_autosuspend_delay(dev, 1000);
+ pm_runtime_use_autosuspend(dev);
+ pm_suspend_ignore_children(dev, true);
+ ret = devm_add_action_or_reset(dev, ps8640_runtime_disable, dev);
+ if (ret)
+ return ret;
+
+ ret = devm_of_dp_aux_populate_bus(&ps_bridge->aux, ps8640_bridge_link_panel);
+
+ /*
+ * If devm_of_dp_aux_populate_bus() returns -ENODEV then it's up to
+ * usa to call ps8640_bridge_link_panel() directly. NOTE: in this case
+ * the function is allowed to -EPROBE_DEFER.
+ */
+ if (ret == -ENODEV)
+ return ps8640_bridge_link_panel(&ps_bridge->aux);
+
+ return ret;
+}
+
+static const struct of_device_id ps8640_match[] = {
+ { .compatible = "parade,ps8640" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ps8640_match);
+
+static struct i2c_driver ps8640_driver = {
+ .probe_new = ps8640_probe,
+ .driver = {
+ .name = "ps8640",
+ .of_match_table = ps8640_match,
+ .pm = &ps8640_pm_ops,
+ },
+};
+module_i2c_driver(ps8640_driver);
+
+MODULE_AUTHOR("Jitao Shi <jitao.shi@mediatek.com>");
+MODULE_AUTHOR("CK Hu <ck.hu@mediatek.com>");
+MODULE_AUTHOR("Enric Balletbo i Serra <enric.balletbo@collabora.com>");
+MODULE_DESCRIPTION("PARADE ps8640 DSI-eDP converter driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
new file mode 100644
index 000000000..6359d6f53
--- /dev/null
+++ b/drivers/gpu/drm/bridge/sii902x.c
@@ -0,0 +1,1182 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2018 Renesas Electronics
+ *
+ * Copyright (C) 2016 Atmel
+ * Bo Shen <voice.shen@atmel.com>
+ *
+ * Authors: Bo Shen <voice.shen@atmel.com>
+ * Boris Brezillon <boris.brezillon@free-electrons.com>
+ * Wu, Songjun <Songjun.Wu@atmel.com>
+ *
+ * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+#include <linux/gpio/consumer.h>
+#include <linux/i2c-mux.h>
+#include <linux/i2c.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/clk.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include <sound/hdmi-codec.h>
+
+#define SII902X_TPI_VIDEO_DATA 0x0
+
+#define SII902X_TPI_PIXEL_REPETITION 0x8
+#define SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT BIT(5)
+#define SII902X_TPI_AVI_PIXEL_REP_RISING_EDGE BIT(4)
+#define SII902X_TPI_AVI_PIXEL_REP_4X 3
+#define SII902X_TPI_AVI_PIXEL_REP_2X 1
+#define SII902X_TPI_AVI_PIXEL_REP_NONE 0
+#define SII902X_TPI_CLK_RATIO_HALF (0 << 6)
+#define SII902X_TPI_CLK_RATIO_1X (1 << 6)
+#define SII902X_TPI_CLK_RATIO_2X (2 << 6)
+#define SII902X_TPI_CLK_RATIO_4X (3 << 6)
+
+#define SII902X_TPI_AVI_IN_FORMAT 0x9
+#define SII902X_TPI_AVI_INPUT_BITMODE_12BIT BIT(7)
+#define SII902X_TPI_AVI_INPUT_DITHER BIT(6)
+#define SII902X_TPI_AVI_INPUT_RANGE_LIMITED (2 << 2)
+#define SII902X_TPI_AVI_INPUT_RANGE_FULL (1 << 2)
+#define SII902X_TPI_AVI_INPUT_RANGE_AUTO (0 << 2)
+#define SII902X_TPI_AVI_INPUT_COLORSPACE_BLACK (3 << 0)
+#define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV422 (2 << 0)
+#define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV444 (1 << 0)
+#define SII902X_TPI_AVI_INPUT_COLORSPACE_RGB (0 << 0)
+
+#define SII902X_TPI_AVI_INFOFRAME 0x0c
+
+#define SII902X_SYS_CTRL_DATA 0x1a
+#define SII902X_SYS_CTRL_PWR_DWN BIT(4)
+#define SII902X_SYS_CTRL_AV_MUTE BIT(3)
+#define SII902X_SYS_CTRL_DDC_BUS_REQ BIT(2)
+#define SII902X_SYS_CTRL_DDC_BUS_GRTD BIT(1)
+#define SII902X_SYS_CTRL_OUTPUT_MODE BIT(0)
+#define SII902X_SYS_CTRL_OUTPUT_HDMI 1
+#define SII902X_SYS_CTRL_OUTPUT_DVI 0
+
+#define SII902X_REG_CHIPID(n) (0x1b + (n))
+
+#define SII902X_PWR_STATE_CTRL 0x1e
+#define SII902X_AVI_POWER_STATE_MSK GENMASK(1, 0)
+#define SII902X_AVI_POWER_STATE_D(l) ((l) & SII902X_AVI_POWER_STATE_MSK)
+
+/* Audio */
+#define SII902X_TPI_I2S_ENABLE_MAPPING_REG 0x1f
+#define SII902X_TPI_I2S_CONFIG_FIFO0 (0 << 0)
+#define SII902X_TPI_I2S_CONFIG_FIFO1 (1 << 0)
+#define SII902X_TPI_I2S_CONFIG_FIFO2 (2 << 0)
+#define SII902X_TPI_I2S_CONFIG_FIFO3 (3 << 0)
+#define SII902X_TPI_I2S_LEFT_RIGHT_SWAP (1 << 2)
+#define SII902X_TPI_I2S_AUTO_DOWNSAMPLE (1 << 3)
+#define SII902X_TPI_I2S_SELECT_SD0 (0 << 4)
+#define SII902X_TPI_I2S_SELECT_SD1 (1 << 4)
+#define SII902X_TPI_I2S_SELECT_SD2 (2 << 4)
+#define SII902X_TPI_I2S_SELECT_SD3 (3 << 4)
+#define SII902X_TPI_I2S_FIFO_ENABLE (1 << 7)
+
+#define SII902X_TPI_I2S_INPUT_CONFIG_REG 0x20
+#define SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES (0 << 0)
+#define SII902X_TPI_I2S_FIRST_BIT_SHIFT_NO (1 << 0)
+#define SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST (0 << 1)
+#define SII902X_TPI_I2S_SD_DIRECTION_LSB_FIRST (1 << 1)
+#define SII902X_TPI_I2S_SD_JUSTIFY_LEFT (0 << 2)
+#define SII902X_TPI_I2S_SD_JUSTIFY_RIGHT (1 << 2)
+#define SII902X_TPI_I2S_WS_POLARITY_LOW (0 << 3)
+#define SII902X_TPI_I2S_WS_POLARITY_HIGH (1 << 3)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_128 (0 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_256 (1 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_384 (2 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_512 (3 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_768 (4 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_1024 (5 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_1152 (6 << 4)
+#define SII902X_TPI_I2S_MCLK_MULTIPLIER_192 (7 << 4)
+#define SII902X_TPI_I2S_SCK_EDGE_FALLING (0 << 7)
+#define SII902X_TPI_I2S_SCK_EDGE_RISING (1 << 7)
+
+#define SII902X_TPI_I2S_STRM_HDR_BASE 0x21
+#define SII902X_TPI_I2S_STRM_HDR_SIZE 5
+
+#define SII902X_TPI_AUDIO_CONFIG_BYTE2_REG 0x26
+#define SII902X_TPI_AUDIO_CODING_STREAM_HEADER (0 << 0)
+#define SII902X_TPI_AUDIO_CODING_PCM (1 << 0)
+#define SII902X_TPI_AUDIO_CODING_AC3 (2 << 0)
+#define SII902X_TPI_AUDIO_CODING_MPEG1 (3 << 0)
+#define SII902X_TPI_AUDIO_CODING_MP3 (4 << 0)
+#define SII902X_TPI_AUDIO_CODING_MPEG2 (5 << 0)
+#define SII902X_TPI_AUDIO_CODING_AAC (6 << 0)
+#define SII902X_TPI_AUDIO_CODING_DTS (7 << 0)
+#define SII902X_TPI_AUDIO_CODING_ATRAC (8 << 0)
+#define SII902X_TPI_AUDIO_MUTE_DISABLE (0 << 4)
+#define SII902X_TPI_AUDIO_MUTE_ENABLE (1 << 4)
+#define SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS (0 << 5)
+#define SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS (1 << 5)
+#define SII902X_TPI_AUDIO_INTERFACE_DISABLE (0 << 6)
+#define SII902X_TPI_AUDIO_INTERFACE_SPDIF (1 << 6)
+#define SII902X_TPI_AUDIO_INTERFACE_I2S (2 << 6)
+
+#define SII902X_TPI_AUDIO_CONFIG_BYTE3_REG 0x27
+#define SII902X_TPI_AUDIO_FREQ_STREAM (0 << 3)
+#define SII902X_TPI_AUDIO_FREQ_32KHZ (1 << 3)
+#define SII902X_TPI_AUDIO_FREQ_44KHZ (2 << 3)
+#define SII902X_TPI_AUDIO_FREQ_48KHZ (3 << 3)
+#define SII902X_TPI_AUDIO_FREQ_88KHZ (4 << 3)
+#define SII902X_TPI_AUDIO_FREQ_96KHZ (5 << 3)
+#define SII902X_TPI_AUDIO_FREQ_176KHZ (6 << 3)
+#define SII902X_TPI_AUDIO_FREQ_192KHZ (7 << 3)
+#define SII902X_TPI_AUDIO_SAMPLE_SIZE_STREAM (0 << 6)
+#define SII902X_TPI_AUDIO_SAMPLE_SIZE_16 (1 << 6)
+#define SII902X_TPI_AUDIO_SAMPLE_SIZE_20 (2 << 6)
+#define SII902X_TPI_AUDIO_SAMPLE_SIZE_24 (3 << 6)
+
+#define SII902X_TPI_AUDIO_CONFIG_BYTE4_REG 0x28
+
+#define SII902X_INT_ENABLE 0x3c
+#define SII902X_INT_STATUS 0x3d
+#define SII902X_HOTPLUG_EVENT BIT(0)
+#define SII902X_PLUGGED_STATUS BIT(2)
+
+#define SII902X_REG_TPI_RQB 0xc7
+
+/* Indirect internal register access */
+#define SII902X_IND_SET_PAGE 0xbc
+#define SII902X_IND_OFFSET 0xbd
+#define SII902X_IND_VALUE 0xbe
+
+#define SII902X_TPI_MISC_INFOFRAME_BASE 0xbf
+#define SII902X_TPI_MISC_INFOFRAME_END 0xde
+#define SII902X_TPI_MISC_INFOFRAME_SIZE \
+ (SII902X_TPI_MISC_INFOFRAME_END - SII902X_TPI_MISC_INFOFRAME_BASE)
+
+#define SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS 500
+
+#define SII902X_AUDIO_PORT_INDEX 3
+
+struct sii902x {
+ struct i2c_client *i2c;
+ struct regmap *regmap;
+ struct drm_bridge bridge;
+ struct drm_bridge *next_bridge;
+ struct drm_connector connector;
+ struct gpio_desc *reset_gpio;
+ struct i2c_mux_core *i2cmux;
+ bool sink_is_hdmi;
+ /*
+ * Mutex protects audio and video functions from interfering
+ * each other, by keeping their i2c command sequences atomic.
+ */
+ struct mutex mutex;
+ struct sii902x_audio {
+ struct platform_device *pdev;
+ struct clk *mclk;
+ u32 i2s_fifo_sequence[4];
+ } audio;
+};
+
+static int sii902x_read_unlocked(struct i2c_client *i2c, u8 reg, u8 *val)
+{
+ union i2c_smbus_data data;
+ int ret;
+
+ ret = __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
+ I2C_SMBUS_READ, reg, I2C_SMBUS_BYTE_DATA, &data);
+
+ if (ret < 0)
+ return ret;
+
+ *val = data.byte;
+ return 0;
+}
+
+static int sii902x_write_unlocked(struct i2c_client *i2c, u8 reg, u8 val)
+{
+ union i2c_smbus_data data;
+
+ data.byte = val;
+
+ return __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
+ I2C_SMBUS_WRITE, reg, I2C_SMBUS_BYTE_DATA,
+ &data);
+}
+
+static int sii902x_update_bits_unlocked(struct i2c_client *i2c, u8 reg, u8 mask,
+ u8 val)
+{
+ int ret;
+ u8 status;
+
+ ret = sii902x_read_unlocked(i2c, reg, &status);
+ if (ret)
+ return ret;
+ status &= ~mask;
+ status |= val & mask;
+ return sii902x_write_unlocked(i2c, reg, status);
+}
+
+static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct sii902x, bridge);
+}
+
+static inline struct sii902x *connector_to_sii902x(struct drm_connector *con)
+{
+ return container_of(con, struct sii902x, connector);
+}
+
+static void sii902x_reset(struct sii902x *sii902x)
+{
+ if (!sii902x->reset_gpio)
+ return;
+
+ gpiod_set_value(sii902x->reset_gpio, 1);
+
+ /* The datasheet says treset-min = 100us. Make it 150us to be sure. */
+ usleep_range(150, 200);
+
+ gpiod_set_value(sii902x->reset_gpio, 0);
+}
+
+static enum drm_connector_status sii902x_detect(struct sii902x *sii902x)
+{
+ unsigned int status;
+
+ mutex_lock(&sii902x->mutex);
+
+ regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
+
+ mutex_unlock(&sii902x->mutex);
+
+ return (status & SII902X_PLUGGED_STATUS) ?
+ connector_status_connected : connector_status_disconnected;
+}
+
+static enum drm_connector_status
+sii902x_connector_detect(struct drm_connector *connector, bool force)
+{
+ struct sii902x *sii902x = connector_to_sii902x(connector);
+
+ return sii902x_detect(sii902x);
+}
+
+static const struct drm_connector_funcs sii902x_connector_funcs = {
+ .detect = sii902x_connector_detect,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static struct edid *sii902x_get_edid(struct sii902x *sii902x,
+ struct drm_connector *connector)
+{
+ struct edid *edid;
+
+ mutex_lock(&sii902x->mutex);
+
+ edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
+ if (edid) {
+ if (drm_detect_hdmi_monitor(edid))
+ sii902x->sink_is_hdmi = true;
+ else
+ sii902x->sink_is_hdmi = false;
+ }
+
+ mutex_unlock(&sii902x->mutex);
+
+ return edid;
+}
+
+static int sii902x_get_modes(struct drm_connector *connector)
+{
+ struct sii902x *sii902x = connector_to_sii902x(connector);
+ struct edid *edid;
+ int num = 0;
+
+ edid = sii902x_get_edid(sii902x, connector);
+ drm_connector_update_edid_property(connector, edid);
+ if (edid) {
+ num = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+ }
+
+ return num;
+}
+
+static enum drm_mode_status sii902x_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ /* TODO: check mode */
+
+ return MODE_OK;
+}
+
+static const struct drm_connector_helper_funcs sii902x_connector_helper_funcs = {
+ .get_modes = sii902x_get_modes,
+ .mode_valid = sii902x_mode_valid,
+};
+
+static void sii902x_bridge_disable(struct drm_bridge *bridge)
+{
+ struct sii902x *sii902x = bridge_to_sii902x(bridge);
+
+ mutex_lock(&sii902x->mutex);
+
+ regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
+ SII902X_SYS_CTRL_PWR_DWN,
+ SII902X_SYS_CTRL_PWR_DWN);
+
+ mutex_unlock(&sii902x->mutex);
+}
+
+static void sii902x_bridge_enable(struct drm_bridge *bridge)
+{
+ struct sii902x *sii902x = bridge_to_sii902x(bridge);
+
+ mutex_lock(&sii902x->mutex);
+
+ regmap_update_bits(sii902x->regmap, SII902X_PWR_STATE_CTRL,
+ SII902X_AVI_POWER_STATE_MSK,
+ SII902X_AVI_POWER_STATE_D(0));
+ regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
+ SII902X_SYS_CTRL_PWR_DWN, 0);
+
+ mutex_unlock(&sii902x->mutex);
+}
+
+static void sii902x_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adj)
+{
+ struct sii902x *sii902x = bridge_to_sii902x(bridge);
+ u8 output_mode = SII902X_SYS_CTRL_OUTPUT_DVI;
+ struct regmap *regmap = sii902x->regmap;
+ u8 buf[HDMI_INFOFRAME_SIZE(AVI)];
+ struct hdmi_avi_infoframe frame;
+ u16 pixel_clock_10kHz = adj->clock / 10;
+ int ret;
+
+ if (sii902x->sink_is_hdmi)
+ output_mode = SII902X_SYS_CTRL_OUTPUT_HDMI;
+
+ buf[0] = pixel_clock_10kHz & 0xff;
+ buf[1] = pixel_clock_10kHz >> 8;
+ buf[2] = drm_mode_vrefresh(adj);
+ buf[3] = 0x00;
+ buf[4] = adj->hdisplay;
+ buf[5] = adj->hdisplay >> 8;
+ buf[6] = adj->vdisplay;
+ buf[7] = adj->vdisplay >> 8;
+ buf[8] = SII902X_TPI_CLK_RATIO_1X | SII902X_TPI_AVI_PIXEL_REP_NONE |
+ SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT;
+ buf[9] = SII902X_TPI_AVI_INPUT_RANGE_AUTO |
+ SII902X_TPI_AVI_INPUT_COLORSPACE_RGB;
+
+ mutex_lock(&sii902x->mutex);
+
+ ret = regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
+ SII902X_SYS_CTRL_OUTPUT_MODE, output_mode);
+ if (ret)
+ goto out;
+
+ ret = regmap_bulk_write(regmap, SII902X_TPI_VIDEO_DATA, buf, 10);
+ if (ret)
+ goto out;
+
+ ret = drm_hdmi_avi_infoframe_from_display_mode(&frame,
+ &sii902x->connector, adj);
+ if (ret < 0) {
+ DRM_ERROR("couldn't fill AVI infoframe\n");
+ goto out;
+ }
+
+ ret = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf));
+ if (ret < 0) {
+ DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
+ goto out;
+ }
+
+ /* Do not send the infoframe header, but keep the CRC field. */
+ regmap_bulk_write(regmap, SII902X_TPI_AVI_INFOFRAME,
+ buf + HDMI_INFOFRAME_HEADER_SIZE - 1,
+ HDMI_AVI_INFOFRAME_SIZE + 1);
+
+out:
+ mutex_unlock(&sii902x->mutex);
+}
+
+static int sii902x_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct sii902x *sii902x = bridge_to_sii902x(bridge);
+ u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+ struct drm_device *drm = bridge->dev;
+ int ret;
+
+ if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
+ return drm_bridge_attach(bridge->encoder, sii902x->next_bridge,
+ bridge, flags);
+
+ drm_connector_helper_add(&sii902x->connector,
+ &sii902x_connector_helper_funcs);
+
+ if (!drm_core_check_feature(drm, DRIVER_ATOMIC)) {
+ dev_err(&sii902x->i2c->dev,
+ "sii902x driver is only compatible with DRM devices supporting atomic updates\n");
+ return -ENOTSUPP;
+ }
+
+ ret = drm_connector_init(drm, &sii902x->connector,
+ &sii902x_connector_funcs,
+ DRM_MODE_CONNECTOR_HDMIA);
+ if (ret)
+ return ret;
+
+ if (sii902x->i2c->irq > 0)
+ sii902x->connector.polled = DRM_CONNECTOR_POLL_HPD;
+ else
+ sii902x->connector.polled = DRM_CONNECTOR_POLL_CONNECT;
+
+ ret = drm_display_info_set_bus_formats(&sii902x->connector.display_info,
+ &bus_format, 1);
+ if (ret)
+ return ret;
+
+ drm_connector_attach_encoder(&sii902x->connector, bridge->encoder);
+
+ return 0;
+}
+
+static enum drm_connector_status sii902x_bridge_detect(struct drm_bridge *bridge)
+{
+ struct sii902x *sii902x = bridge_to_sii902x(bridge);
+
+ return sii902x_detect(sii902x);
+}
+
+static struct edid *sii902x_bridge_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct sii902x *sii902x = bridge_to_sii902x(bridge);
+
+ return sii902x_get_edid(sii902x, connector);
+}
+
+static const struct drm_bridge_funcs sii902x_bridge_funcs = {
+ .attach = sii902x_bridge_attach,
+ .mode_set = sii902x_bridge_mode_set,
+ .disable = sii902x_bridge_disable,
+ .enable = sii902x_bridge_enable,
+ .detect = sii902x_bridge_detect,
+ .get_edid = sii902x_bridge_get_edid,
+};
+
+static int sii902x_mute(struct sii902x *sii902x, bool mute)
+{
+ struct device *dev = &sii902x->i2c->dev;
+ unsigned int val = mute ? SII902X_TPI_AUDIO_MUTE_ENABLE :
+ SII902X_TPI_AUDIO_MUTE_DISABLE;
+
+ dev_dbg(dev, "%s: %s\n", __func__, mute ? "Muted" : "Unmuted");
+
+ return regmap_update_bits(sii902x->regmap,
+ SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
+ SII902X_TPI_AUDIO_MUTE_ENABLE, val);
+}
+
+static const int sii902x_mclk_div_table[] = {
+ 128, 256, 384, 512, 768, 1024, 1152, 192 };
+
+static int sii902x_select_mclk_div(u8 *i2s_config_reg, unsigned int rate,
+ unsigned int mclk)
+{
+ int div = mclk / rate;
+ int distance = 100000;
+ u8 i, nearest = 0;
+
+ for (i = 0; i < ARRAY_SIZE(sii902x_mclk_div_table); i++) {
+ unsigned int d = abs(div - sii902x_mclk_div_table[i]);
+
+ if (d >= distance)
+ continue;
+
+ nearest = i;
+ distance = d;
+ if (d == 0)
+ break;
+ }
+
+ *i2s_config_reg |= nearest << 4;
+
+ return sii902x_mclk_div_table[nearest];
+}
+
+static const struct sii902x_sample_freq {
+ u32 freq;
+ u8 val;
+} sii902x_sample_freq[] = {
+ { .freq = 32000, .val = SII902X_TPI_AUDIO_FREQ_32KHZ },
+ { .freq = 44000, .val = SII902X_TPI_AUDIO_FREQ_44KHZ },
+ { .freq = 48000, .val = SII902X_TPI_AUDIO_FREQ_48KHZ },
+ { .freq = 88000, .val = SII902X_TPI_AUDIO_FREQ_88KHZ },
+ { .freq = 96000, .val = SII902X_TPI_AUDIO_FREQ_96KHZ },
+ { .freq = 176000, .val = SII902X_TPI_AUDIO_FREQ_176KHZ },
+ { .freq = 192000, .val = SII902X_TPI_AUDIO_FREQ_192KHZ },
+};
+
+static int sii902x_audio_hw_params(struct device *dev, void *data,
+ struct hdmi_codec_daifmt *daifmt,
+ struct hdmi_codec_params *params)
+{
+ struct sii902x *sii902x = dev_get_drvdata(dev);
+ u8 i2s_config_reg = SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST;
+ u8 config_byte2_reg = (SII902X_TPI_AUDIO_INTERFACE_I2S |
+ SII902X_TPI_AUDIO_MUTE_ENABLE |
+ SII902X_TPI_AUDIO_CODING_PCM);
+ u8 config_byte3_reg = 0;
+ u8 infoframe_buf[HDMI_INFOFRAME_SIZE(AUDIO)];
+ unsigned long mclk_rate;
+ int i, ret;
+
+ if (daifmt->bit_clk_provider || daifmt->frame_clk_provider) {
+ dev_dbg(dev, "%s: I2S clock provider mode not supported\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ switch (daifmt->fmt) {
+ case HDMI_I2S:
+ i2s_config_reg |= SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES |
+ SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
+ break;
+ case HDMI_RIGHT_J:
+ i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_RIGHT;
+ break;
+ case HDMI_LEFT_J:
+ i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
+ break;
+ default:
+ dev_dbg(dev, "%s: Unsupported i2s format %u\n", __func__,
+ daifmt->fmt);
+ return -EINVAL;
+ }
+
+ if (daifmt->bit_clk_inv)
+ i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_FALLING;
+ else
+ i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_RISING;
+
+ if (daifmt->frame_clk_inv)
+ i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_LOW;
+ else
+ i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_HIGH;
+
+ if (params->channels > 2)
+ config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS;
+ else
+ config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS;
+
+ switch (params->sample_width) {
+ case 16:
+ config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_16;
+ break;
+ case 20:
+ config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_20;
+ break;
+ case 24:
+ case 32:
+ config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_24;
+ break;
+ default:
+ dev_err(dev, "%s: Unsupported sample width %u\n", __func__,
+ params->sample_width);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(sii902x_sample_freq); i++) {
+ if (params->sample_rate == sii902x_sample_freq[i].freq) {
+ config_byte3_reg |= sii902x_sample_freq[i].val;
+ break;
+ }
+ }
+
+ ret = clk_prepare_enable(sii902x->audio.mclk);
+ if (ret) {
+ dev_err(dev, "Enabling mclk failed: %d\n", ret);
+ return ret;
+ }
+
+ if (sii902x->audio.mclk) {
+ mclk_rate = clk_get_rate(sii902x->audio.mclk);
+ ret = sii902x_select_mclk_div(&i2s_config_reg,
+ params->sample_rate, mclk_rate);
+ if (mclk_rate != ret * params->sample_rate)
+ dev_dbg(dev, "Inaccurate reference clock (%ld/%d != %u)\n",
+ mclk_rate, ret, params->sample_rate);
+ }
+
+ mutex_lock(&sii902x->mutex);
+
+ ret = regmap_write(sii902x->regmap,
+ SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
+ config_byte2_reg);
+ if (ret < 0)
+ goto out;
+
+ ret = regmap_write(sii902x->regmap, SII902X_TPI_I2S_INPUT_CONFIG_REG,
+ i2s_config_reg);
+ if (ret)
+ goto out;
+
+ for (i = 0; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_sequence) &&
+ sii902x->audio.i2s_fifo_sequence[i]; i++)
+ regmap_write(sii902x->regmap,
+ SII902X_TPI_I2S_ENABLE_MAPPING_REG,
+ sii902x->audio.i2s_fifo_sequence[i]);
+
+ ret = regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE3_REG,
+ config_byte3_reg);
+ if (ret)
+ goto out;
+
+ ret = regmap_bulk_write(sii902x->regmap, SII902X_TPI_I2S_STRM_HDR_BASE,
+ params->iec.status,
+ min((size_t) SII902X_TPI_I2S_STRM_HDR_SIZE,
+ sizeof(params->iec.status)));
+ if (ret)
+ goto out;
+
+ ret = hdmi_audio_infoframe_pack(&params->cea, infoframe_buf,
+ sizeof(infoframe_buf));
+ if (ret < 0) {
+ dev_err(dev, "%s: Failed to pack audio infoframe: %d\n",
+ __func__, ret);
+ goto out;
+ }
+
+ ret = regmap_bulk_write(sii902x->regmap,
+ SII902X_TPI_MISC_INFOFRAME_BASE,
+ infoframe_buf,
+ min(ret, SII902X_TPI_MISC_INFOFRAME_SIZE));
+ if (ret)
+ goto out;
+
+ /* Decode Level 0 Packets */
+ ret = regmap_write(sii902x->regmap, SII902X_IND_SET_PAGE, 0x02);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(sii902x->regmap, SII902X_IND_OFFSET, 0x24);
+ if (ret)
+ goto out;
+
+ ret = regmap_write(sii902x->regmap, SII902X_IND_VALUE, 0x02);
+ if (ret)
+ goto out;
+
+ dev_dbg(dev, "%s: hdmi audio enabled\n", __func__);
+out:
+ mutex_unlock(&sii902x->mutex);
+
+ if (ret) {
+ clk_disable_unprepare(sii902x->audio.mclk);
+ dev_err(dev, "%s: hdmi audio enable failed: %d\n", __func__,
+ ret);
+ }
+
+ return ret;
+}
+
+static void sii902x_audio_shutdown(struct device *dev, void *data)
+{
+ struct sii902x *sii902x = dev_get_drvdata(dev);
+
+ mutex_lock(&sii902x->mutex);
+
+ regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
+ SII902X_TPI_AUDIO_INTERFACE_DISABLE);
+
+ mutex_unlock(&sii902x->mutex);
+
+ clk_disable_unprepare(sii902x->audio.mclk);
+}
+
+static int sii902x_audio_mute(struct device *dev, void *data,
+ bool enable, int direction)
+{
+ struct sii902x *sii902x = dev_get_drvdata(dev);
+
+ mutex_lock(&sii902x->mutex);
+
+ sii902x_mute(sii902x, enable);
+
+ mutex_unlock(&sii902x->mutex);
+
+ return 0;
+}
+
+static int sii902x_audio_get_eld(struct device *dev, void *data,
+ uint8_t *buf, size_t len)
+{
+ struct sii902x *sii902x = dev_get_drvdata(dev);
+
+ mutex_lock(&sii902x->mutex);
+
+ memcpy(buf, sii902x->connector.eld,
+ min(sizeof(sii902x->connector.eld), len));
+
+ mutex_unlock(&sii902x->mutex);
+
+ return 0;
+}
+
+static int sii902x_audio_get_dai_id(struct snd_soc_component *component,
+ struct device_node *endpoint)
+{
+ struct of_endpoint of_ep;
+ int ret;
+
+ ret = of_graph_parse_endpoint(endpoint, &of_ep);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * HDMI sound should be located at reg = <3>
+ * Return expected DAI index 0.
+ */
+ if (of_ep.port == SII902X_AUDIO_PORT_INDEX)
+ return 0;
+
+ return -EINVAL;
+}
+
+static const struct hdmi_codec_ops sii902x_audio_codec_ops = {
+ .hw_params = sii902x_audio_hw_params,
+ .audio_shutdown = sii902x_audio_shutdown,
+ .mute_stream = sii902x_audio_mute,
+ .get_eld = sii902x_audio_get_eld,
+ .get_dai_id = sii902x_audio_get_dai_id,
+ .no_capture_mute = 1,
+};
+
+static int sii902x_audio_codec_init(struct sii902x *sii902x,
+ struct device *dev)
+{
+ static const u8 audio_fifo_id[] = {
+ SII902X_TPI_I2S_CONFIG_FIFO0,
+ SII902X_TPI_I2S_CONFIG_FIFO1,
+ SII902X_TPI_I2S_CONFIG_FIFO2,
+ SII902X_TPI_I2S_CONFIG_FIFO3,
+ };
+ static const u8 i2s_lane_id[] = {
+ SII902X_TPI_I2S_SELECT_SD0,
+ SII902X_TPI_I2S_SELECT_SD1,
+ SII902X_TPI_I2S_SELECT_SD2,
+ SII902X_TPI_I2S_SELECT_SD3,
+ };
+ struct hdmi_codec_pdata codec_data = {
+ .ops = &sii902x_audio_codec_ops,
+ .i2s = 1, /* Only i2s support for now. */
+ .spdif = 0,
+ .max_i2s_channels = 0,
+ };
+ u8 lanes[4];
+ int num_lanes, i;
+
+ if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) {
+ dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n",
+ __func__);
+ return 0;
+ }
+
+ num_lanes = of_property_read_variable_u8_array(dev->of_node,
+ "sil,i2s-data-lanes",
+ lanes, 1,
+ ARRAY_SIZE(lanes));
+
+ if (num_lanes == -EINVAL) {
+ dev_dbg(dev,
+ "%s: No \"sil,i2s-data-lanes\", use default <0>\n",
+ __func__);
+ num_lanes = 1;
+ lanes[0] = 0;
+ } else if (num_lanes < 0) {
+ dev_err(dev,
+ "%s: Error gettin \"sil,i2s-data-lanes\": %d\n",
+ __func__, num_lanes);
+ return num_lanes;
+ }
+ codec_data.max_i2s_channels = 2 * num_lanes;
+
+ for (i = 0; i < num_lanes; i++)
+ sii902x->audio.i2s_fifo_sequence[i] |= audio_fifo_id[i] |
+ i2s_lane_id[lanes[i]] | SII902X_TPI_I2S_FIFO_ENABLE;
+
+ sii902x->audio.mclk = devm_clk_get_optional(dev, "mclk");
+ if (IS_ERR(sii902x->audio.mclk)) {
+ dev_err(dev, "%s: No clock (audio mclk) found: %ld\n",
+ __func__, PTR_ERR(sii902x->audio.mclk));
+ return PTR_ERR(sii902x->audio.mclk);
+ }
+
+ sii902x->audio.pdev = platform_device_register_data(
+ dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
+ &codec_data, sizeof(codec_data));
+
+ return PTR_ERR_OR_ZERO(sii902x->audio.pdev);
+}
+
+static const struct regmap_range sii902x_volatile_ranges[] = {
+ { .range_min = 0, .range_max = 0xff },
+};
+
+static const struct regmap_access_table sii902x_volatile_table = {
+ .yes_ranges = sii902x_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(sii902x_volatile_ranges),
+};
+
+static const struct regmap_config sii902x_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .disable_locking = true, /* struct sii902x mutex should be enough */
+ .max_register = SII902X_TPI_MISC_INFOFRAME_END,
+ .volatile_table = &sii902x_volatile_table,
+ .cache_type = REGCACHE_NONE,
+};
+
+static irqreturn_t sii902x_interrupt(int irq, void *data)
+{
+ struct sii902x *sii902x = data;
+ unsigned int status = 0;
+
+ mutex_lock(&sii902x->mutex);
+
+ regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
+ regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
+
+ mutex_unlock(&sii902x->mutex);
+
+ if ((status & SII902X_HOTPLUG_EVENT) && sii902x->bridge.dev) {
+ drm_helper_hpd_irq_event(sii902x->bridge.dev);
+ drm_bridge_hpd_notify(&sii902x->bridge, (status & SII902X_PLUGGED_STATUS)
+ ? connector_status_connected
+ : connector_status_disconnected);
+ }
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * The purpose of sii902x_i2c_bypass_select is to enable the pass through
+ * mode of the HDMI transmitter. Do not use regmap from within this function,
+ * only use sii902x_*_unlocked functions to read/modify/write registers.
+ * We are holding the parent adapter lock here, keep this in mind before
+ * adding more i2c transactions.
+ *
+ * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
+ * in this driver, we need to make sure that we only touch 0x1A[2:1] from
+ * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
+ * we leave the remaining bits as we have found them.
+ */
+static int sii902x_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id)
+{
+ struct sii902x *sii902x = i2c_mux_priv(mux);
+ struct device *dev = &sii902x->i2c->dev;
+ unsigned long timeout;
+ u8 status;
+ int ret;
+
+ ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
+ SII902X_SYS_CTRL_DDC_BUS_REQ,
+ SII902X_SYS_CTRL_DDC_BUS_REQ);
+ if (ret)
+ return ret;
+
+ timeout = jiffies +
+ msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
+ do {
+ ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
+ &status);
+ if (ret)
+ return ret;
+ } while (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
+ time_before(jiffies, timeout));
+
+ if (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
+ dev_err(dev, "Failed to acquire the i2c bus\n");
+ return -ETIMEDOUT;
+ }
+
+ return sii902x_write_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
+ status);
+}
+
+/*
+ * The purpose of sii902x_i2c_bypass_deselect is to disable the pass through
+ * mode of the HDMI transmitter. Do not use regmap from within this function,
+ * only use sii902x_*_unlocked functions to read/modify/write registers.
+ * We are holding the parent adapter lock here, keep this in mind before
+ * adding more i2c transactions.
+ *
+ * Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
+ * in this driver, we need to make sure that we only touch 0x1A[2:1] from
+ * within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
+ * we leave the remaining bits as we have found them.
+ */
+static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id)
+{
+ struct sii902x *sii902x = i2c_mux_priv(mux);
+ struct device *dev = &sii902x->i2c->dev;
+ unsigned long timeout;
+ unsigned int retries;
+ u8 status;
+ int ret;
+
+ /*
+ * When the HDMI transmitter is in pass through mode, we need an
+ * (undocumented) additional delay between STOP and START conditions
+ * to guarantee the bus won't get stuck.
+ */
+ udelay(30);
+
+ /*
+ * Sometimes the I2C bus can stall after failure to use the
+ * EDID channel. Retry a few times to see if things clear
+ * up, else continue anyway.
+ */
+ retries = 5;
+ do {
+ ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
+ &status);
+ retries--;
+ } while (ret && retries);
+ if (ret) {
+ dev_err(dev, "failed to read status (%d)\n", ret);
+ return ret;
+ }
+
+ ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
+ SII902X_SYS_CTRL_DDC_BUS_REQ |
+ SII902X_SYS_CTRL_DDC_BUS_GRTD, 0);
+ if (ret)
+ return ret;
+
+ timeout = jiffies +
+ msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
+ do {
+ ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
+ &status);
+ if (ret)
+ return ret;
+ } while (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
+ SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
+ time_before(jiffies, timeout));
+
+ if (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
+ SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
+ dev_err(dev, "failed to release the i2c bus\n");
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static const struct drm_bridge_timings default_sii902x_timings = {
+ .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE
+ | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE
+ | DRM_BUS_FLAG_DE_HIGH,
+};
+
+static int sii902x_init(struct sii902x *sii902x)
+{
+ struct device *dev = &sii902x->i2c->dev;
+ unsigned int status = 0;
+ u8 chipid[4];
+ int ret;
+
+ sii902x_reset(sii902x);
+
+ ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0);
+ if (ret)
+ return ret;
+
+ ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0),
+ &chipid, 4);
+ if (ret) {
+ dev_err(dev, "regmap_read failed %d\n", ret);
+ return ret;
+ }
+
+ if (chipid[0] != 0xb0) {
+ dev_err(dev, "Invalid chipid: %02x (expecting 0xb0)\n",
+ chipid[0]);
+ return -EINVAL;
+ }
+
+ /* Clear all pending interrupts */
+ regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
+ regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
+
+ if (sii902x->i2c->irq > 0) {
+ regmap_write(sii902x->regmap, SII902X_INT_ENABLE,
+ SII902X_HOTPLUG_EVENT);
+
+ ret = devm_request_threaded_irq(dev, sii902x->i2c->irq, NULL,
+ sii902x_interrupt,
+ IRQF_ONESHOT, dev_name(dev),
+ sii902x);
+ if (ret)
+ return ret;
+ }
+
+ ret = sii902x_audio_codec_init(sii902x, dev);
+ if (ret)
+ return ret;
+
+ i2c_set_clientdata(sii902x->i2c, sii902x);
+
+ sii902x->i2cmux = i2c_mux_alloc(sii902x->i2c->adapter, dev,
+ 1, 0, I2C_MUX_GATE,
+ sii902x_i2c_bypass_select,
+ sii902x_i2c_bypass_deselect);
+ if (!sii902x->i2cmux) {
+ ret = -ENOMEM;
+ goto err_unreg_audio;
+ }
+
+ sii902x->i2cmux->priv = sii902x;
+ ret = i2c_mux_add_adapter(sii902x->i2cmux, 0, 0, 0);
+ if (ret)
+ goto err_unreg_audio;
+
+ sii902x->bridge.funcs = &sii902x_bridge_funcs;
+ sii902x->bridge.of_node = dev->of_node;
+ sii902x->bridge.timings = &default_sii902x_timings;
+ sii902x->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID;
+
+ if (sii902x->i2c->irq > 0)
+ sii902x->bridge.ops |= DRM_BRIDGE_OP_HPD;
+
+ drm_bridge_add(&sii902x->bridge);
+
+ return 0;
+
+err_unreg_audio:
+ if (!PTR_ERR_OR_ZERO(sii902x->audio.pdev))
+ platform_device_unregister(sii902x->audio.pdev);
+
+ return ret;
+}
+
+static int sii902x_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct device_node *endpoint;
+ struct sii902x *sii902x;
+ static const char * const supplies[] = {"iovcc", "cvcc12"};
+ int ret;
+
+ ret = i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_BYTE_DATA);
+ if (!ret) {
+ dev_err(dev, "I2C adapter not suitable\n");
+ return -EIO;
+ }
+
+ sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL);
+ if (!sii902x)
+ return -ENOMEM;
+
+ sii902x->i2c = client;
+ sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config);
+ if (IS_ERR(sii902x->regmap))
+ return PTR_ERR(sii902x->regmap);
+
+ sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(sii902x->reset_gpio)) {
+ dev_err(dev, "Failed to retrieve/request reset gpio: %ld\n",
+ PTR_ERR(sii902x->reset_gpio));
+ return PTR_ERR(sii902x->reset_gpio);
+ }
+
+ endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 1, -1);
+ if (endpoint) {
+ struct device_node *remote = of_graph_get_remote_port_parent(endpoint);
+
+ of_node_put(endpoint);
+ if (!remote) {
+ dev_err(dev, "Endpoint in port@1 unconnected\n");
+ return -ENODEV;
+ }
+
+ if (!of_device_is_available(remote)) {
+ dev_err(dev, "port@1 remote device is disabled\n");
+ of_node_put(remote);
+ return -ENODEV;
+ }
+
+ sii902x->next_bridge = of_drm_find_bridge(remote);
+ of_node_put(remote);
+ if (!sii902x->next_bridge)
+ return -EPROBE_DEFER;
+ }
+
+ mutex_init(&sii902x->mutex);
+
+ ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(supplies), supplies);
+ if (ret < 0)
+ return dev_err_probe(dev, ret, "Failed to enable supplies");
+
+ return sii902x_init(sii902x);
+}
+
+static void sii902x_remove(struct i2c_client *client)
+{
+ struct sii902x *sii902x = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&sii902x->bridge);
+ i2c_mux_del_adapters(sii902x->i2cmux);
+
+ if (!PTR_ERR_OR_ZERO(sii902x->audio.pdev))
+ platform_device_unregister(sii902x->audio.pdev);
+}
+
+static const struct of_device_id sii902x_dt_ids[] = {
+ { .compatible = "sil,sii9022", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, sii902x_dt_ids);
+
+static const struct i2c_device_id sii902x_i2c_ids[] = {
+ { "sii9022", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, sii902x_i2c_ids);
+
+static struct i2c_driver sii902x_driver = {
+ .probe = sii902x_probe,
+ .remove = sii902x_remove,
+ .driver = {
+ .name = "sii902x",
+ .of_match_table = sii902x_dt_ids,
+ },
+ .id_table = sii902x_i2c_ids,
+};
+module_i2c_driver(sii902x_driver);
+
+MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
+MODULE_DESCRIPTION("SII902x RGB -> HDMI bridges");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/bridge/sii9234.c b/drivers/gpu/drm/bridge/sii9234.c
new file mode 100644
index 000000000..5b3061d4b
--- /dev/null
+++ b/drivers/gpu/drm/bridge/sii9234.c
@@ -0,0 +1,970 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2017 Samsung Electronics
+ *
+ * Authors:
+ * Tomasz Stanislawski <t.stanislaws@samsung.com>
+ * Maciej Purski <m.purski@samsung.com>
+ *
+ * Based on sii9234 driver created by:
+ * Adam Hampson <ahampson@sta.samsung.com>
+ * Erik Gilling <konkers@android.com>
+ * Shankar Bandal <shankar.b@samsung.com>
+ * Dharam Kumar <dharam.kr@samsung.com>
+ */
+#include <drm/bridge/mhl.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#define CBUS_DEVCAP_OFFSET 0x80
+
+#define SII9234_MHL_VERSION 0x11
+#define SII9234_SCRATCHPAD_SIZE 0x10
+#define SII9234_INT_STAT_SIZE 0x33
+
+#define BIT_TMDS_CCTRL_TMDS_OE BIT(4)
+#define MHL_HPD_OUT_OVR_EN BIT(4)
+#define MHL_HPD_OUT_OVR_VAL BIT(5)
+#define MHL_INIT_TIMEOUT 0x0C
+
+/* MHL Tx registers and bits */
+#define MHL_TX_SRST 0x05
+#define MHL_TX_SYSSTAT_REG 0x09
+#define MHL_TX_INTR1_REG 0x71
+#define MHL_TX_INTR4_REG 0x74
+#define MHL_TX_INTR1_ENABLE_REG 0x75
+#define MHL_TX_INTR4_ENABLE_REG 0x78
+#define MHL_TX_INT_CTRL_REG 0x79
+#define MHL_TX_TMDS_CCTRL 0x80
+#define MHL_TX_DISC_CTRL1_REG 0x90
+#define MHL_TX_DISC_CTRL2_REG 0x91
+#define MHL_TX_DISC_CTRL3_REG 0x92
+#define MHL_TX_DISC_CTRL4_REG 0x93
+#define MHL_TX_DISC_CTRL5_REG 0x94
+#define MHL_TX_DISC_CTRL6_REG 0x95
+#define MHL_TX_DISC_CTRL7_REG 0x96
+#define MHL_TX_DISC_CTRL8_REG 0x97
+#define MHL_TX_STAT2_REG 0x99
+#define MHL_TX_MHLTX_CTL1_REG 0xA0
+#define MHL_TX_MHLTX_CTL2_REG 0xA1
+#define MHL_TX_MHLTX_CTL4_REG 0xA3
+#define MHL_TX_MHLTX_CTL6_REG 0xA5
+#define MHL_TX_MHLTX_CTL7_REG 0xA6
+
+#define RSEN_STATUS BIT(2)
+#define HPD_CHANGE_INT BIT(6)
+#define RSEN_CHANGE_INT BIT(5)
+#define RGND_READY_INT BIT(6)
+#define VBUS_LOW_INT BIT(5)
+#define CBUS_LKOUT_INT BIT(4)
+#define MHL_DISC_FAIL_INT BIT(3)
+#define MHL_EST_INT BIT(2)
+#define HPD_CHANGE_INT_MASK BIT(6)
+#define RSEN_CHANGE_INT_MASK BIT(5)
+
+#define RGND_READY_MASK BIT(6)
+#define CBUS_LKOUT_MASK BIT(4)
+#define MHL_DISC_FAIL_MASK BIT(3)
+#define MHL_EST_MASK BIT(2)
+
+#define SKIP_GND BIT(6)
+
+#define ATT_THRESH_SHIFT 0x04
+#define ATT_THRESH_MASK (0x03 << ATT_THRESH_SHIFT)
+#define USB_D_OEN BIT(3)
+#define DEGLITCH_TIME_MASK 0x07
+#define DEGLITCH_TIME_2MS 0
+#define DEGLITCH_TIME_4MS 1
+#define DEGLITCH_TIME_8MS 2
+#define DEGLITCH_TIME_16MS 3
+#define DEGLITCH_TIME_40MS 4
+#define DEGLITCH_TIME_50MS 5
+#define DEGLITCH_TIME_60MS 6
+#define DEGLITCH_TIME_128MS 7
+
+#define USB_D_OVR BIT(7)
+#define USB_ID_OVR BIT(6)
+#define DVRFLT_SEL BIT(5)
+#define BLOCK_RGND_INT BIT(4)
+#define SKIP_DEG BIT(3)
+#define CI2CA_POL BIT(2)
+#define CI2CA_WKUP BIT(1)
+#define SINGLE_ATT BIT(0)
+
+#define USB_D_ODN BIT(5)
+#define VBUS_CHECK BIT(2)
+#define RGND_INTP_MASK 0x03
+#define RGND_INTP_OPEN 0
+#define RGND_INTP_2K 1
+#define RGND_INTP_1K 2
+#define RGND_INTP_SHORT 3
+
+/* HDMI registers */
+#define HDMI_RX_TMDS0_CCTRL1_REG 0x10
+#define HDMI_RX_TMDS_CLK_EN_REG 0x11
+#define HDMI_RX_TMDS_CH_EN_REG 0x12
+#define HDMI_RX_PLL_CALREFSEL_REG 0x17
+#define HDMI_RX_PLL_VCOCAL_REG 0x1A
+#define HDMI_RX_EQ_DATA0_REG 0x22
+#define HDMI_RX_EQ_DATA1_REG 0x23
+#define HDMI_RX_EQ_DATA2_REG 0x24
+#define HDMI_RX_EQ_DATA3_REG 0x25
+#define HDMI_RX_EQ_DATA4_REG 0x26
+#define HDMI_RX_TMDS_ZONE_CTRL_REG 0x4C
+#define HDMI_RX_TMDS_MODE_CTRL_REG 0x4D
+
+/* CBUS registers */
+#define CBUS_INT_STATUS_1_REG 0x08
+#define CBUS_INTR1_ENABLE_REG 0x09
+#define CBUS_MSC_REQ_ABORT_REASON_REG 0x0D
+#define CBUS_INT_STATUS_2_REG 0x1E
+#define CBUS_INTR2_ENABLE_REG 0x1F
+#define CBUS_LINK_CONTROL_2_REG 0x31
+#define CBUS_MHL_STATUS_REG_0 0xB0
+#define CBUS_MHL_STATUS_REG_1 0xB1
+
+#define BIT_CBUS_RESET BIT(3)
+#define SET_HPD_DOWNSTREAM BIT(6)
+
+/* TPI registers */
+#define TPI_DPD_REG 0x3D
+
+/* Timeouts in msec */
+#define T_SRC_VBUS_CBUS_TO_STABLE 200
+#define T_SRC_CBUS_FLOAT 100
+#define T_SRC_CBUS_DEGLITCH 2
+#define T_SRC_RXSENSE_DEGLITCH 110
+
+#define MHL1_MAX_CLK 75000 /* in kHz */
+
+#define I2C_TPI_ADDR 0x3D
+#define I2C_HDMI_ADDR 0x49
+#define I2C_CBUS_ADDR 0x64
+
+enum sii9234_state {
+ ST_OFF,
+ ST_D3,
+ ST_RGND_INIT,
+ ST_RGND_1K,
+ ST_RSEN_HIGH,
+ ST_MHL_ESTABLISHED,
+ ST_FAILURE_DISCOVERY,
+ ST_FAILURE,
+};
+
+struct sii9234 {
+ struct i2c_client *client[4];
+ struct drm_bridge bridge;
+ struct device *dev;
+ struct gpio_desc *gpio_reset;
+ int i2c_error;
+ struct regulator_bulk_data supplies[4];
+
+ struct mutex lock; /* Protects fields below and device registers */
+ enum sii9234_state state;
+};
+
+enum sii9234_client_id {
+ I2C_MHL,
+ I2C_TPI,
+ I2C_HDMI,
+ I2C_CBUS,
+};
+
+static const char * const sii9234_client_name[] = {
+ [I2C_MHL] = "MHL",
+ [I2C_TPI] = "TPI",
+ [I2C_HDMI] = "HDMI",
+ [I2C_CBUS] = "CBUS",
+};
+
+static int sii9234_writeb(struct sii9234 *ctx, int id, int offset,
+ int value)
+{
+ int ret;
+ struct i2c_client *client = ctx->client[id];
+
+ if (ctx->i2c_error)
+ return ctx->i2c_error;
+
+ ret = i2c_smbus_write_byte_data(client, offset, value);
+ if (ret < 0)
+ dev_err(ctx->dev, "writeb: %4s[0x%02x] <- 0x%02x\n",
+ sii9234_client_name[id], offset, value);
+ ctx->i2c_error = ret;
+
+ return ret;
+}
+
+static int sii9234_writebm(struct sii9234 *ctx, int id, int offset,
+ int value, int mask)
+{
+ int ret;
+ struct i2c_client *client = ctx->client[id];
+
+ if (ctx->i2c_error)
+ return ctx->i2c_error;
+
+ ret = i2c_smbus_write_byte(client, offset);
+ if (ret < 0) {
+ dev_err(ctx->dev, "writebm: %4s[0x%02x] <- 0x%02x\n",
+ sii9234_client_name[id], offset, value);
+ ctx->i2c_error = ret;
+ return ret;
+ }
+
+ ret = i2c_smbus_read_byte(client);
+ if (ret < 0) {
+ dev_err(ctx->dev, "writebm: %4s[0x%02x] <- 0x%02x\n",
+ sii9234_client_name[id], offset, value);
+ ctx->i2c_error = ret;
+ return ret;
+ }
+
+ value = (value & mask) | (ret & ~mask);
+
+ ret = i2c_smbus_write_byte_data(client, offset, value);
+ if (ret < 0) {
+ dev_err(ctx->dev, "writebm: %4s[0x%02x] <- 0x%02x\n",
+ sii9234_client_name[id], offset, value);
+ ctx->i2c_error = ret;
+ }
+
+ return ret;
+}
+
+static int sii9234_readb(struct sii9234 *ctx, int id, int offset)
+{
+ int ret;
+ struct i2c_client *client = ctx->client[id];
+
+ if (ctx->i2c_error)
+ return ctx->i2c_error;
+
+ ret = i2c_smbus_write_byte(client, offset);
+ if (ret < 0) {
+ dev_err(ctx->dev, "readb: %4s[0x%02x]\n",
+ sii9234_client_name[id], offset);
+ ctx->i2c_error = ret;
+ return ret;
+ }
+
+ ret = i2c_smbus_read_byte(client);
+ if (ret < 0) {
+ dev_err(ctx->dev, "readb: %4s[0x%02x]\n",
+ sii9234_client_name[id], offset);
+ ctx->i2c_error = ret;
+ }
+
+ return ret;
+}
+
+static int sii9234_clear_error(struct sii9234 *ctx)
+{
+ int ret = ctx->i2c_error;
+
+ ctx->i2c_error = 0;
+
+ return ret;
+}
+
+#define mhl_tx_writeb(sii9234, offset, value) \
+ sii9234_writeb(sii9234, I2C_MHL, offset, value)
+#define mhl_tx_writebm(sii9234, offset, value, mask) \
+ sii9234_writebm(sii9234, I2C_MHL, offset, value, mask)
+#define mhl_tx_readb(sii9234, offset) \
+ sii9234_readb(sii9234, I2C_MHL, offset)
+#define cbus_writeb(sii9234, offset, value) \
+ sii9234_writeb(sii9234, I2C_CBUS, offset, value)
+#define cbus_writebm(sii9234, offset, value, mask) \
+ sii9234_writebm(sii9234, I2C_CBUS, offset, value, mask)
+#define cbus_readb(sii9234, offset) \
+ sii9234_readb(sii9234, I2C_CBUS, offset)
+#define hdmi_writeb(sii9234, offset, value) \
+ sii9234_writeb(sii9234, I2C_HDMI, offset, value)
+#define hdmi_writebm(sii9234, offset, value, mask) \
+ sii9234_writebm(sii9234, I2C_HDMI, offset, value, mask)
+#define hdmi_readb(sii9234, offset) \
+ sii9234_readb(sii9234, I2C_HDMI, offset)
+#define tpi_writeb(sii9234, offset, value) \
+ sii9234_writeb(sii9234, I2C_TPI, offset, value)
+#define tpi_writebm(sii9234, offset, value, mask) \
+ sii9234_writebm(sii9234, I2C_TPI, offset, value, mask)
+#define tpi_readb(sii9234, offset) \
+ sii9234_readb(sii9234, I2C_TPI, offset)
+
+static u8 sii9234_tmds_control(struct sii9234 *ctx, bool enable)
+{
+ mhl_tx_writebm(ctx, MHL_TX_TMDS_CCTRL, enable ? ~0 : 0,
+ BIT_TMDS_CCTRL_TMDS_OE);
+ mhl_tx_writebm(ctx, MHL_TX_INT_CTRL_REG, enable ? ~0 : 0,
+ MHL_HPD_OUT_OVR_EN | MHL_HPD_OUT_OVR_VAL);
+ return sii9234_clear_error(ctx);
+}
+
+static int sii9234_cbus_reset(struct sii9234 *ctx)
+{
+ int i;
+
+ mhl_tx_writebm(ctx, MHL_TX_SRST, ~0, BIT_CBUS_RESET);
+ msleep(T_SRC_CBUS_DEGLITCH);
+ mhl_tx_writebm(ctx, MHL_TX_SRST, 0, BIT_CBUS_RESET);
+
+ for (i = 0; i < 4; i++) {
+ /*
+ * Enable WRITE_STAT interrupt for writes to all
+ * 4 MSC Status registers.
+ */
+ cbus_writeb(ctx, 0xE0 + i, 0xF2);
+ /*
+ * Enable SET_INT interrupt for writes to all
+ * 4 MSC Interrupt registers.
+ */
+ cbus_writeb(ctx, 0xF0 + i, 0xF2);
+ }
+
+ return sii9234_clear_error(ctx);
+}
+
+/* Require to chek mhl imformation of samsung in cbus_init_register */
+static int sii9234_cbus_init(struct sii9234 *ctx)
+{
+ cbus_writeb(ctx, 0x07, 0xF2);
+ cbus_writeb(ctx, 0x40, 0x03);
+ cbus_writeb(ctx, 0x42, 0x06);
+ cbus_writeb(ctx, 0x36, 0x0C);
+ cbus_writeb(ctx, 0x3D, 0xFD);
+ cbus_writeb(ctx, 0x1C, 0x01);
+ cbus_writeb(ctx, 0x1D, 0x0F);
+ cbus_writeb(ctx, 0x44, 0x02);
+ /* Setup our devcap */
+ cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_DEV_STATE, 0x00);
+ cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_MHL_VERSION,
+ SII9234_MHL_VERSION);
+ cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_CAT,
+ MHL_DCAP_CAT_SOURCE);
+ cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_ADOPTER_ID_H, 0x01);
+ cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_ADOPTER_ID_L, 0x41);
+ cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_VID_LINK_MODE,
+ MHL_DCAP_VID_LINK_RGB444 | MHL_DCAP_VID_LINK_YCBCR444);
+ cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_VIDEO_TYPE,
+ MHL_DCAP_VT_GRAPHICS);
+ cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_LOG_DEV_MAP,
+ MHL_DCAP_LD_GUI);
+ cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_BANDWIDTH, 0x0F);
+ cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_FEATURE_FLAG,
+ MHL_DCAP_FEATURE_RCP_SUPPORT | MHL_DCAP_FEATURE_RAP_SUPPORT
+ | MHL_DCAP_FEATURE_SP_SUPPORT);
+ cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_DEVICE_ID_H, 0x0);
+ cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_DEVICE_ID_L, 0x0);
+ cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_SCRATCHPAD_SIZE,
+ SII9234_SCRATCHPAD_SIZE);
+ cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_INT_STAT_SIZE,
+ SII9234_INT_STAT_SIZE);
+ cbus_writeb(ctx, CBUS_DEVCAP_OFFSET + MHL_DCAP_RESERVED, 0);
+ cbus_writebm(ctx, 0x31, 0x0C, 0x0C);
+ cbus_writeb(ctx, 0x30, 0x01);
+ cbus_writebm(ctx, 0x3C, 0x30, 0x38);
+ cbus_writebm(ctx, 0x22, 0x0D, 0x0F);
+ cbus_writebm(ctx, 0x2E, 0x15, 0x15);
+ cbus_writeb(ctx, CBUS_INTR1_ENABLE_REG, 0);
+ cbus_writeb(ctx, CBUS_INTR2_ENABLE_REG, 0);
+
+ return sii9234_clear_error(ctx);
+}
+
+static void force_usb_id_switch_open(struct sii9234 *ctx)
+{
+ /* Disable CBUS discovery */
+ mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL1_REG, 0, 0x01);
+ /* Force USB ID switch to open */
+ mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL6_REG, ~0, USB_ID_OVR);
+ mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL3_REG, ~0, 0x86);
+ /* Force upstream HPD to 0 when not in MHL mode. */
+ mhl_tx_writebm(ctx, MHL_TX_INT_CTRL_REG, 0, 0x30);
+}
+
+static void release_usb_id_switch_open(struct sii9234 *ctx)
+{
+ msleep(T_SRC_CBUS_FLOAT);
+ /* Clear USB ID switch to open */
+ mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL6_REG, 0, USB_ID_OVR);
+ /* Enable CBUS discovery */
+ mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL1_REG, ~0, 0x01);
+}
+
+static int sii9234_power_init(struct sii9234 *ctx)
+{
+ /* Force the SiI9234 into the D0 state. */
+ tpi_writeb(ctx, TPI_DPD_REG, 0x3F);
+ /* Enable TxPLL Clock */
+ hdmi_writeb(ctx, HDMI_RX_TMDS_CLK_EN_REG, 0x01);
+ /* Enable Tx Clock Path & Equalizer */
+ hdmi_writeb(ctx, HDMI_RX_TMDS_CH_EN_REG, 0x15);
+ /* Power Up TMDS */
+ mhl_tx_writeb(ctx, 0x08, 0x35);
+ return sii9234_clear_error(ctx);
+}
+
+static int sii9234_hdmi_init(struct sii9234 *ctx)
+{
+ hdmi_writeb(ctx, HDMI_RX_TMDS0_CCTRL1_REG, 0xC1);
+ hdmi_writeb(ctx, HDMI_RX_PLL_CALREFSEL_REG, 0x03);
+ hdmi_writeb(ctx, HDMI_RX_PLL_VCOCAL_REG, 0x20);
+ hdmi_writeb(ctx, HDMI_RX_EQ_DATA0_REG, 0x8A);
+ hdmi_writeb(ctx, HDMI_RX_EQ_DATA1_REG, 0x6A);
+ hdmi_writeb(ctx, HDMI_RX_EQ_DATA2_REG, 0xAA);
+ hdmi_writeb(ctx, HDMI_RX_EQ_DATA3_REG, 0xCA);
+ hdmi_writeb(ctx, HDMI_RX_EQ_DATA4_REG, 0xEA);
+ hdmi_writeb(ctx, HDMI_RX_TMDS_ZONE_CTRL_REG, 0xA0);
+ hdmi_writeb(ctx, HDMI_RX_TMDS_MODE_CTRL_REG, 0x00);
+ mhl_tx_writeb(ctx, MHL_TX_TMDS_CCTRL, 0x34);
+ hdmi_writeb(ctx, 0x45, 0x44);
+ hdmi_writeb(ctx, 0x31, 0x0A);
+ hdmi_writeb(ctx, HDMI_RX_TMDS0_CCTRL1_REG, 0xC1);
+
+ return sii9234_clear_error(ctx);
+}
+
+static int sii9234_mhl_tx_ctl_int(struct sii9234 *ctx)
+{
+ mhl_tx_writeb(ctx, MHL_TX_MHLTX_CTL1_REG, 0xD0);
+ mhl_tx_writeb(ctx, MHL_TX_MHLTX_CTL2_REG, 0xFC);
+ mhl_tx_writeb(ctx, MHL_TX_MHLTX_CTL4_REG, 0xEB);
+ mhl_tx_writeb(ctx, MHL_TX_MHLTX_CTL7_REG, 0x0C);
+
+ return sii9234_clear_error(ctx);
+}
+
+static int sii9234_reset(struct sii9234 *ctx)
+{
+ int ret;
+
+ sii9234_clear_error(ctx);
+
+ ret = sii9234_power_init(ctx);
+ if (ret < 0)
+ return ret;
+ ret = sii9234_cbus_reset(ctx);
+ if (ret < 0)
+ return ret;
+ ret = sii9234_hdmi_init(ctx);
+ if (ret < 0)
+ return ret;
+ ret = sii9234_mhl_tx_ctl_int(ctx);
+ if (ret < 0)
+ return ret;
+
+ /* Enable HDCP Compliance safety */
+ mhl_tx_writeb(ctx, 0x2B, 0x01);
+ /* CBUS discovery cycle time for each drive and float = 150us */
+ mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL1_REG, 0x04, 0x06);
+ /* Clear bit 6 (reg_skip_rgnd) */
+ mhl_tx_writeb(ctx, MHL_TX_DISC_CTRL2_REG, (1 << 7) /* Reserved */
+ | 2 << ATT_THRESH_SHIFT | DEGLITCH_TIME_50MS);
+ /*
+ * Changed from 66 to 65 for 94[1:0] = 01 = 5k reg_cbusmhl_pup_sel
+ * 1.8V CBUS VTH & GND threshold
+ * to meet CTS 3.3.7.2 spec
+ */
+ mhl_tx_writeb(ctx, MHL_TX_DISC_CTRL5_REG, 0x77);
+ cbus_writebm(ctx, CBUS_LINK_CONTROL_2_REG, ~0, MHL_INIT_TIMEOUT);
+ mhl_tx_writeb(ctx, MHL_TX_MHLTX_CTL6_REG, 0xA0);
+ /* RGND & single discovery attempt (RGND blocking) */
+ mhl_tx_writeb(ctx, MHL_TX_DISC_CTRL6_REG, BLOCK_RGND_INT |
+ DVRFLT_SEL | SINGLE_ATT);
+ /* Use VBUS path of discovery state machine */
+ mhl_tx_writeb(ctx, MHL_TX_DISC_CTRL8_REG, 0);
+ /* 0x92[3] sets the CBUS / ID switch */
+ mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL6_REG, ~0, USB_ID_OVR);
+ /*
+ * To allow RGND engine to operate correctly.
+ * When moving the chip from D2 to D0 (power up, init regs)
+ * the values should be
+ * 94[1:0] = 01 reg_cbusmhl_pup_sel[1:0] should be set for 5k
+ * 93[7:6] = 10 reg_cbusdisc_pup_sel[1:0] should be
+ * set for 10k (default)
+ * 93[5:4] = 00 reg_cbusidle_pup_sel[1:0] = open (default)
+ */
+ mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL3_REG, ~0, 0x86);
+ /*
+ * Change from CC to 8C to match 5K
+ * to meet CTS 3.3.72 spec
+ */
+ mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL4_REG, ~0, 0x8C);
+ /* Configure the interrupt as active high */
+ mhl_tx_writebm(ctx, MHL_TX_INT_CTRL_REG, 0, 0x06);
+
+ msleep(25);
+
+ /* Release usb_id switch */
+ mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL6_REG, 0, USB_ID_OVR);
+ mhl_tx_writeb(ctx, MHL_TX_DISC_CTRL1_REG, 0x27);
+
+ ret = sii9234_clear_error(ctx);
+ if (ret < 0)
+ return ret;
+ ret = sii9234_cbus_init(ctx);
+ if (ret < 0)
+ return ret;
+
+ /* Enable Auto soft reset on SCDT = 0 */
+ mhl_tx_writeb(ctx, 0x05, 0x04);
+ /* HDMI Transcode mode enable */
+ mhl_tx_writeb(ctx, 0x0D, 0x1C);
+ mhl_tx_writeb(ctx, MHL_TX_INTR4_ENABLE_REG,
+ RGND_READY_MASK | CBUS_LKOUT_MASK
+ | MHL_DISC_FAIL_MASK | MHL_EST_MASK);
+ mhl_tx_writeb(ctx, MHL_TX_INTR1_ENABLE_REG, 0x60);
+
+ /* This point is very important before measure RGND impedance */
+ force_usb_id_switch_open(ctx);
+ mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL4_REG, 0, 0xF0);
+ mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL5_REG, 0, 0x03);
+ release_usb_id_switch_open(ctx);
+
+ /* Force upstream HPD to 0 when not in MHL mode */
+ mhl_tx_writebm(ctx, MHL_TX_INT_CTRL_REG, 0, 1 << 5);
+ mhl_tx_writebm(ctx, MHL_TX_INT_CTRL_REG, ~0, 1 << 4);
+
+ return sii9234_clear_error(ctx);
+}
+
+static int sii9234_goto_d3(struct sii9234 *ctx)
+{
+ int ret;
+
+ dev_dbg(ctx->dev, "sii9234: detection started d3\n");
+
+ ret = sii9234_reset(ctx);
+ if (ret < 0)
+ goto exit;
+
+ hdmi_writeb(ctx, 0x01, 0x03);
+ tpi_writebm(ctx, TPI_DPD_REG, 0, 1);
+ /* I2C above is expected to fail because power goes down */
+ sii9234_clear_error(ctx);
+
+ ctx->state = ST_D3;
+
+ return 0;
+ exit:
+ dev_err(ctx->dev, "%s failed\n", __func__);
+ return -1;
+}
+
+static int sii9234_hw_on(struct sii9234 *ctx)
+{
+ return regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+}
+
+static void sii9234_hw_off(struct sii9234 *ctx)
+{
+ gpiod_set_value(ctx->gpio_reset, 1);
+ msleep(20);
+ regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+}
+
+static void sii9234_hw_reset(struct sii9234 *ctx)
+{
+ gpiod_set_value(ctx->gpio_reset, 1);
+ msleep(20);
+ gpiod_set_value(ctx->gpio_reset, 0);
+}
+
+static void sii9234_cable_in(struct sii9234 *ctx)
+{
+ int ret;
+
+ mutex_lock(&ctx->lock);
+ if (ctx->state != ST_OFF)
+ goto unlock;
+ ret = sii9234_hw_on(ctx);
+ if (ret < 0)
+ goto unlock;
+
+ sii9234_hw_reset(ctx);
+ sii9234_goto_d3(ctx);
+ /* To avoid irq storm, when hw is in meta state */
+ enable_irq(to_i2c_client(ctx->dev)->irq);
+
+unlock:
+ mutex_unlock(&ctx->lock);
+}
+
+static void sii9234_cable_out(struct sii9234 *ctx)
+{
+ mutex_lock(&ctx->lock);
+
+ if (ctx->state == ST_OFF)
+ goto unlock;
+
+ disable_irq(to_i2c_client(ctx->dev)->irq);
+ tpi_writeb(ctx, TPI_DPD_REG, 0);
+ /* Turn on&off hpd festure for only QCT HDMI */
+ sii9234_hw_off(ctx);
+
+ ctx->state = ST_OFF;
+
+unlock:
+ mutex_unlock(&ctx->lock);
+}
+
+static enum sii9234_state sii9234_rgnd_ready_irq(struct sii9234 *ctx)
+{
+ int value;
+
+ if (ctx->state == ST_D3) {
+ int ret;
+
+ dev_dbg(ctx->dev, "RGND_READY_INT\n");
+ sii9234_hw_reset(ctx);
+
+ ret = sii9234_reset(ctx);
+ if (ret < 0) {
+ dev_err(ctx->dev, "sii9234_reset() failed\n");
+ return ST_FAILURE;
+ }
+
+ return ST_RGND_INIT;
+ }
+
+ /* Got interrupt in inappropriate state */
+ if (ctx->state != ST_RGND_INIT)
+ return ST_FAILURE;
+
+ value = mhl_tx_readb(ctx, MHL_TX_STAT2_REG);
+ if (sii9234_clear_error(ctx))
+ return ST_FAILURE;
+
+ if ((value & RGND_INTP_MASK) != RGND_INTP_1K) {
+ dev_warn(ctx->dev, "RGND is not 1k\n");
+ return ST_RGND_INIT;
+ }
+ dev_dbg(ctx->dev, "RGND 1K!!\n");
+ mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL4_REG, ~0, 0x8C);
+ mhl_tx_writeb(ctx, MHL_TX_DISC_CTRL5_REG, 0x77);
+ mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL6_REG, ~0, 0x05);
+ if (sii9234_clear_error(ctx))
+ return ST_FAILURE;
+
+ msleep(T_SRC_VBUS_CBUS_TO_STABLE);
+ return ST_RGND_1K;
+}
+
+static enum sii9234_state sii9234_mhl_established(struct sii9234 *ctx)
+{
+ dev_dbg(ctx->dev, "mhl est interrupt\n");
+
+ /* Discovery override */
+ mhl_tx_writeb(ctx, MHL_TX_MHLTX_CTL1_REG, 0x10);
+ /* Increase DDC translation layer timer (byte mode) */
+ cbus_writeb(ctx, 0x07, 0x32);
+ cbus_writebm(ctx, 0x44, ~0, 1 << 1);
+ /* Keep the discovery enabled. Need RGND interrupt */
+ mhl_tx_writebm(ctx, MHL_TX_DISC_CTRL1_REG, ~0, 1);
+ mhl_tx_writeb(ctx, MHL_TX_INTR1_ENABLE_REG,
+ RSEN_CHANGE_INT_MASK | HPD_CHANGE_INT_MASK);
+
+ if (sii9234_clear_error(ctx))
+ return ST_FAILURE;
+
+ return ST_MHL_ESTABLISHED;
+}
+
+static enum sii9234_state sii9234_hpd_change(struct sii9234 *ctx)
+{
+ int value;
+
+ value = cbus_readb(ctx, CBUS_MSC_REQ_ABORT_REASON_REG);
+ if (sii9234_clear_error(ctx))
+ return ST_FAILURE;
+
+ if (value & SET_HPD_DOWNSTREAM) {
+ /* Downstream HPD High, Enable TMDS */
+ sii9234_tmds_control(ctx, true);
+ } else {
+ /* Downstream HPD Low, Disable TMDS */
+ sii9234_tmds_control(ctx, false);
+ }
+
+ return ctx->state;
+}
+
+static enum sii9234_state sii9234_rsen_change(struct sii9234 *ctx)
+{
+ int value;
+
+ /* Work_around code to handle wrong interrupt */
+ if (ctx->state != ST_RGND_1K) {
+ dev_err(ctx->dev, "RSEN_HIGH without RGND_1K\n");
+ return ST_FAILURE;
+ }
+ value = mhl_tx_readb(ctx, MHL_TX_SYSSTAT_REG);
+ if (value < 0)
+ return ST_FAILURE;
+
+ if (value & RSEN_STATUS) {
+ dev_dbg(ctx->dev, "MHL cable connected.. RSEN High\n");
+ return ST_RSEN_HIGH;
+ }
+ dev_dbg(ctx->dev, "RSEN lost\n");
+ /*
+ * Once RSEN loss is confirmed,we need to check
+ * based on cable status and chip power status,whether
+ * it is SINK Loss(HDMI cable not connected, TV Off)
+ * or MHL cable disconnection
+ * TODO: Define the below mhl_disconnection()
+ */
+ msleep(T_SRC_RXSENSE_DEGLITCH);
+ value = mhl_tx_readb(ctx, MHL_TX_SYSSTAT_REG);
+ if (value < 0)
+ return ST_FAILURE;
+ dev_dbg(ctx->dev, "sys_stat: %x\n", value);
+
+ if (value & RSEN_STATUS) {
+ dev_dbg(ctx->dev, "RSEN recovery\n");
+ return ST_RSEN_HIGH;
+ }
+ dev_dbg(ctx->dev, "RSEN Really LOW\n");
+ /* To meet CTS 3.3.22.2 spec */
+ sii9234_tmds_control(ctx, false);
+ force_usb_id_switch_open(ctx);
+ release_usb_id_switch_open(ctx);
+
+ return ST_FAILURE;
+}
+
+static irqreturn_t sii9234_irq_thread(int irq, void *data)
+{
+ struct sii9234 *ctx = data;
+ int intr1, intr4;
+ int intr1_en, intr4_en;
+ int cbus_intr1, cbus_intr2;
+
+ dev_dbg(ctx->dev, "%s\n", __func__);
+
+ mutex_lock(&ctx->lock);
+
+ intr1 = mhl_tx_readb(ctx, MHL_TX_INTR1_REG);
+ intr4 = mhl_tx_readb(ctx, MHL_TX_INTR4_REG);
+ intr1_en = mhl_tx_readb(ctx, MHL_TX_INTR1_ENABLE_REG);
+ intr4_en = mhl_tx_readb(ctx, MHL_TX_INTR4_ENABLE_REG);
+ cbus_intr1 = cbus_readb(ctx, CBUS_INT_STATUS_1_REG);
+ cbus_intr2 = cbus_readb(ctx, CBUS_INT_STATUS_2_REG);
+
+ if (sii9234_clear_error(ctx))
+ goto done;
+
+ dev_dbg(ctx->dev, "irq %02x/%02x %02x/%02x %02x/%02x\n",
+ intr1, intr1_en, intr4, intr4_en, cbus_intr1, cbus_intr2);
+
+ if (intr4 & RGND_READY_INT)
+ ctx->state = sii9234_rgnd_ready_irq(ctx);
+ if (intr1 & RSEN_CHANGE_INT)
+ ctx->state = sii9234_rsen_change(ctx);
+ if (intr4 & MHL_EST_INT)
+ ctx->state = sii9234_mhl_established(ctx);
+ if (intr1 & HPD_CHANGE_INT)
+ ctx->state = sii9234_hpd_change(ctx);
+ if (intr4 & CBUS_LKOUT_INT)
+ ctx->state = ST_FAILURE;
+ if (intr4 & MHL_DISC_FAIL_INT)
+ ctx->state = ST_FAILURE_DISCOVERY;
+
+ done:
+ /* Clean interrupt status and pending flags */
+ mhl_tx_writeb(ctx, MHL_TX_INTR1_REG, intr1);
+ mhl_tx_writeb(ctx, MHL_TX_INTR4_REG, intr4);
+ cbus_writeb(ctx, CBUS_MHL_STATUS_REG_0, 0xFF);
+ cbus_writeb(ctx, CBUS_MHL_STATUS_REG_1, 0xFF);
+ cbus_writeb(ctx, CBUS_INT_STATUS_1_REG, cbus_intr1);
+ cbus_writeb(ctx, CBUS_INT_STATUS_2_REG, cbus_intr2);
+
+ sii9234_clear_error(ctx);
+
+ if (ctx->state == ST_FAILURE) {
+ dev_dbg(ctx->dev, "try to reset after failure\n");
+ sii9234_hw_reset(ctx);
+ sii9234_goto_d3(ctx);
+ }
+
+ if (ctx->state == ST_FAILURE_DISCOVERY) {
+ dev_err(ctx->dev, "discovery failed, no power for MHL?\n");
+ tpi_writebm(ctx, TPI_DPD_REG, 0, 1);
+ ctx->state = ST_D3;
+ }
+
+ mutex_unlock(&ctx->lock);
+
+ return IRQ_HANDLED;
+}
+
+static int sii9234_init_resources(struct sii9234 *ctx,
+ struct i2c_client *client)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ int ret;
+
+ if (!ctx->dev->of_node) {
+ dev_err(ctx->dev, "not DT device\n");
+ return -ENODEV;
+ }
+
+ ctx->gpio_reset = devm_gpiod_get(ctx->dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(ctx->gpio_reset)) {
+ dev_err(ctx->dev, "failed to get reset gpio from DT\n");
+ return PTR_ERR(ctx->gpio_reset);
+ }
+
+ ctx->supplies[0].supply = "avcc12";
+ ctx->supplies[1].supply = "avcc33";
+ ctx->supplies[2].supply = "iovcc18";
+ ctx->supplies[3].supply = "cvcc12";
+ ret = devm_regulator_bulk_get(ctx->dev, 4, ctx->supplies);
+ if (ret) {
+ if (ret != -EPROBE_DEFER)
+ dev_err(ctx->dev, "regulator_bulk failed\n");
+ return ret;
+ }
+
+ ctx->client[I2C_MHL] = client;
+
+ ctx->client[I2C_TPI] = devm_i2c_new_dummy_device(&client->dev, adapter,
+ I2C_TPI_ADDR);
+ if (IS_ERR(ctx->client[I2C_TPI])) {
+ dev_err(ctx->dev, "failed to create TPI client\n");
+ return PTR_ERR(ctx->client[I2C_TPI]);
+ }
+
+ ctx->client[I2C_HDMI] = devm_i2c_new_dummy_device(&client->dev, adapter,
+ I2C_HDMI_ADDR);
+ if (IS_ERR(ctx->client[I2C_HDMI])) {
+ dev_err(ctx->dev, "failed to create HDMI RX client\n");
+ return PTR_ERR(ctx->client[I2C_HDMI]);
+ }
+
+ ctx->client[I2C_CBUS] = devm_i2c_new_dummy_device(&client->dev, adapter,
+ I2C_CBUS_ADDR);
+ if (IS_ERR(ctx->client[I2C_CBUS])) {
+ dev_err(ctx->dev, "failed to create CBUS client\n");
+ return PTR_ERR(ctx->client[I2C_CBUS]);
+ }
+
+ return 0;
+}
+
+static inline struct sii9234 *bridge_to_sii9234(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct sii9234, bridge);
+}
+
+static enum drm_mode_status sii9234_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ if (mode->clock > MHL1_MAX_CLK)
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
+}
+
+static const struct drm_bridge_funcs sii9234_bridge_funcs = {
+ .mode_valid = sii9234_mode_valid,
+};
+
+static int sii9234_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ struct sii9234 *ctx;
+ struct device *dev = &client->dev;
+ int ret;
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->dev = dev;
+ mutex_init(&ctx->lock);
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
+ dev_err(dev, "I2C adapter lacks SMBUS feature\n");
+ return -EIO;
+ }
+
+ if (!client->irq) {
+ dev_err(dev, "no irq provided\n");
+ return -EINVAL;
+ }
+
+ irq_set_status_flags(client->irq, IRQ_NOAUTOEN);
+ ret = devm_request_threaded_irq(dev, client->irq, NULL,
+ sii9234_irq_thread,
+ IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+ "sii9234", ctx);
+ if (ret < 0) {
+ dev_err(dev, "failed to install IRQ handler\n");
+ return ret;
+ }
+
+ ret = sii9234_init_resources(ctx, client);
+ if (ret < 0)
+ return ret;
+
+ i2c_set_clientdata(client, ctx);
+
+ ctx->bridge.funcs = &sii9234_bridge_funcs;
+ ctx->bridge.of_node = dev->of_node;
+ drm_bridge_add(&ctx->bridge);
+
+ sii9234_cable_in(ctx);
+
+ return 0;
+}
+
+static void sii9234_remove(struct i2c_client *client)
+{
+ struct sii9234 *ctx = i2c_get_clientdata(client);
+
+ sii9234_cable_out(ctx);
+ drm_bridge_remove(&ctx->bridge);
+}
+
+static const struct of_device_id sii9234_dt_match[] = {
+ { .compatible = "sil,sii9234" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, sii9234_dt_match);
+
+static const struct i2c_device_id sii9234_id[] = {
+ { "SII9234", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, sii9234_id);
+
+static struct i2c_driver sii9234_driver = {
+ .driver = {
+ .name = "sii9234",
+ .of_match_table = sii9234_dt_match,
+ },
+ .probe = sii9234_probe,
+ .remove = sii9234_remove,
+ .id_table = sii9234_id,
+};
+
+module_i2c_driver(sii9234_driver);
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/bridge/sil-sii8620.c b/drivers/gpu/drm/bridge/sil-sii8620.c
new file mode 100644
index 000000000..511982a1c
--- /dev/null
+++ b/drivers/gpu/drm/bridge/sil-sii8620.c
@@ -0,0 +1,2388 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Silicon Image SiI8620 HDMI/MHL bridge driver
+ *
+ * Copyright (C) 2015, Samsung Electronics Co., Ltd.
+ * Andrzej Hajda <a.hajda@samsung.com>
+ */
+
+#include <asm/unaligned.h>
+
+#include <drm/bridge/mhl.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_encoder.h>
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/extcon.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_graph.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#include <media/rc-core.h>
+
+#include "sil-sii8620.h"
+
+#define SII8620_BURST_BUF_LEN 288
+#define VAL_RX_HDMI_CTRL2_DEFVAL VAL_RX_HDMI_CTRL2_IDLE_CNT(3)
+
+#define MHL1_MAX_PCLK 75000
+#define MHL1_MAX_PCLK_PP_MODE 150000
+#define MHL3_MAX_PCLK 200000
+#define MHL3_MAX_PCLK_PP_MODE 300000
+
+enum sii8620_mode {
+ CM_DISCONNECTED,
+ CM_DISCOVERY,
+ CM_MHL1,
+ CM_MHL3,
+ CM_ECBUS_S
+};
+
+enum sii8620_sink_type {
+ SINK_NONE,
+ SINK_HDMI,
+ SINK_DVI
+};
+
+enum sii8620_mt_state {
+ MT_STATE_READY,
+ MT_STATE_BUSY,
+ MT_STATE_DONE
+};
+
+struct sii8620 {
+ struct drm_bridge bridge;
+ struct device *dev;
+ struct rc_dev *rc_dev;
+ struct clk *clk_xtal;
+ struct gpio_desc *gpio_reset;
+ struct gpio_desc *gpio_int;
+ struct regulator_bulk_data supplies[2];
+ struct mutex lock; /* context lock, protects fields below */
+ int error;
+ unsigned int use_packed_pixel:1;
+ enum sii8620_mode mode;
+ enum sii8620_sink_type sink_type;
+ u8 cbus_status;
+ u8 stat[MHL_DST_SIZE];
+ u8 xstat[MHL_XDS_SIZE];
+ u8 devcap[MHL_DCAP_SIZE];
+ u8 xdevcap[MHL_XDC_SIZE];
+ bool feature_complete;
+ bool devcap_read;
+ bool sink_detected;
+ struct edid *edid;
+ unsigned int gen2_write_burst:1;
+ enum sii8620_mt_state mt_state;
+ struct extcon_dev *extcon;
+ struct notifier_block extcon_nb;
+ struct work_struct extcon_wq;
+ int cable_state;
+ struct list_head mt_queue;
+ struct {
+ int r_size;
+ int r_count;
+ int rx_ack;
+ int rx_count;
+ u8 rx_buf[32];
+ int tx_count;
+ u8 tx_buf[32];
+ } burst;
+};
+
+struct sii8620_mt_msg;
+
+typedef void (*sii8620_mt_msg_cb)(struct sii8620 *ctx,
+ struct sii8620_mt_msg *msg);
+
+typedef void (*sii8620_cb)(struct sii8620 *ctx, int ret);
+
+struct sii8620_mt_msg {
+ struct list_head node;
+ u8 reg[4];
+ u8 ret;
+ sii8620_mt_msg_cb send;
+ sii8620_mt_msg_cb recv;
+ sii8620_cb continuation;
+};
+
+static const u8 sii8620_i2c_page[] = {
+ 0x39, /* Main System */
+ 0x3d, /* TDM and HSIC */
+ 0x49, /* TMDS Receiver, MHL EDID */
+ 0x4d, /* eMSC, HDCP, HSIC */
+ 0x5d, /* MHL Spec */
+ 0x64, /* MHL CBUS */
+ 0x59, /* Hardware TPI (Transmitter Programming Interface) */
+ 0x61, /* eCBUS-S, eCBUS-D */
+};
+
+static void sii8620_fetch_edid(struct sii8620 *ctx);
+static void sii8620_set_upstream_edid(struct sii8620 *ctx);
+static void sii8620_enable_hpd(struct sii8620 *ctx);
+static void sii8620_mhl_disconnected(struct sii8620 *ctx);
+static void sii8620_disconnect(struct sii8620 *ctx);
+
+static int sii8620_clear_error(struct sii8620 *ctx)
+{
+ int ret = ctx->error;
+
+ ctx->error = 0;
+ return ret;
+}
+
+static void sii8620_read_buf(struct sii8620 *ctx, u16 addr, u8 *buf, int len)
+{
+ struct device *dev = ctx->dev;
+ struct i2c_client *client = to_i2c_client(dev);
+ u8 data = addr;
+ struct i2c_msg msg[] = {
+ {
+ .addr = sii8620_i2c_page[addr >> 8],
+ .flags = client->flags,
+ .len = 1,
+ .buf = &data
+ },
+ {
+ .addr = sii8620_i2c_page[addr >> 8],
+ .flags = client->flags | I2C_M_RD,
+ .len = len,
+ .buf = buf
+ },
+ };
+ int ret;
+
+ if (ctx->error)
+ return;
+
+ ret = i2c_transfer(client->adapter, msg, 2);
+ dev_dbg(dev, "read at %04x: %*ph, %d\n", addr, len, buf, ret);
+
+ if (ret != 2) {
+ dev_err(dev, "Read at %#06x of %d bytes failed with code %d.\n",
+ addr, len, ret);
+ ctx->error = ret < 0 ? ret : -EIO;
+ }
+}
+
+static u8 sii8620_readb(struct sii8620 *ctx, u16 addr)
+{
+ u8 ret = 0;
+
+ sii8620_read_buf(ctx, addr, &ret, 1);
+ return ret;
+}
+
+static void sii8620_write_buf(struct sii8620 *ctx, u16 addr, const u8 *buf,
+ int len)
+{
+ struct device *dev = ctx->dev;
+ struct i2c_client *client = to_i2c_client(dev);
+ u8 data[2];
+ struct i2c_msg msg = {
+ .addr = sii8620_i2c_page[addr >> 8],
+ .flags = client->flags,
+ .len = len + 1,
+ };
+ int ret;
+
+ if (ctx->error)
+ return;
+
+ if (len > 1) {
+ msg.buf = kmalloc(len + 1, GFP_KERNEL);
+ if (!msg.buf) {
+ ctx->error = -ENOMEM;
+ return;
+ }
+ memcpy(msg.buf + 1, buf, len);
+ } else {
+ msg.buf = data;
+ msg.buf[1] = *buf;
+ }
+
+ msg.buf[0] = addr;
+
+ ret = i2c_transfer(client->adapter, &msg, 1);
+ dev_dbg(dev, "write at %04x: %*ph, %d\n", addr, len, buf, ret);
+
+ if (ret != 1) {
+ dev_err(dev, "Write at %#06x of %*ph failed with code %d.\n",
+ addr, len, buf, ret);
+ ctx->error = ret ?: -EIO;
+ }
+
+ if (len > 1)
+ kfree(msg.buf);
+}
+
+#define sii8620_write(ctx, addr, arr...) \
+({\
+ u8 d[] = { arr }; \
+ sii8620_write_buf(ctx, addr, d, ARRAY_SIZE(d)); \
+})
+
+static void __sii8620_write_seq(struct sii8620 *ctx, const u16 *seq, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i += 2)
+ sii8620_write(ctx, seq[i], seq[i + 1]);
+}
+
+#define sii8620_write_seq(ctx, seq...) \
+({\
+ const u16 d[] = { seq }; \
+ __sii8620_write_seq(ctx, d, ARRAY_SIZE(d)); \
+})
+
+#define sii8620_write_seq_static(ctx, seq...) \
+({\
+ static const u16 d[] = { seq }; \
+ __sii8620_write_seq(ctx, d, ARRAY_SIZE(d)); \
+})
+
+static void sii8620_setbits(struct sii8620 *ctx, u16 addr, u8 mask, u8 val)
+{
+ val = (val & mask) | (sii8620_readb(ctx, addr) & ~mask);
+ sii8620_write(ctx, addr, val);
+}
+
+static inline bool sii8620_is_mhl3(struct sii8620 *ctx)
+{
+ return ctx->mode >= CM_MHL3;
+}
+
+static void sii8620_mt_cleanup(struct sii8620 *ctx)
+{
+ struct sii8620_mt_msg *msg, *n;
+
+ list_for_each_entry_safe(msg, n, &ctx->mt_queue, node) {
+ list_del(&msg->node);
+ kfree(msg);
+ }
+ ctx->mt_state = MT_STATE_READY;
+}
+
+static void sii8620_mt_work(struct sii8620 *ctx)
+{
+ struct sii8620_mt_msg *msg;
+
+ if (ctx->error)
+ return;
+ if (ctx->mt_state == MT_STATE_BUSY || list_empty(&ctx->mt_queue))
+ return;
+
+ if (ctx->mt_state == MT_STATE_DONE) {
+ ctx->mt_state = MT_STATE_READY;
+ msg = list_first_entry(&ctx->mt_queue, struct sii8620_mt_msg,
+ node);
+ list_del(&msg->node);
+ if (msg->recv)
+ msg->recv(ctx, msg);
+ if (msg->continuation)
+ msg->continuation(ctx, msg->ret);
+ kfree(msg);
+ }
+
+ if (ctx->mt_state != MT_STATE_READY || list_empty(&ctx->mt_queue))
+ return;
+
+ ctx->mt_state = MT_STATE_BUSY;
+ msg = list_first_entry(&ctx->mt_queue, struct sii8620_mt_msg, node);
+ if (msg->send)
+ msg->send(ctx, msg);
+}
+
+static void sii8620_enable_gen2_write_burst(struct sii8620 *ctx)
+{
+ u8 ctrl = BIT_MDT_RCV_CTRL_MDT_RCV_EN;
+
+ if (ctx->gen2_write_burst)
+ return;
+
+ if (ctx->mode >= CM_MHL1)
+ ctrl |= BIT_MDT_RCV_CTRL_MDT_DELAY_RCV_EN;
+
+ sii8620_write_seq(ctx,
+ REG_MDT_RCV_TIMEOUT, 100,
+ REG_MDT_RCV_CTRL, ctrl
+ );
+ ctx->gen2_write_burst = 1;
+}
+
+static void sii8620_disable_gen2_write_burst(struct sii8620 *ctx)
+{
+ if (!ctx->gen2_write_burst)
+ return;
+
+ sii8620_write_seq_static(ctx,
+ REG_MDT_XMIT_CTRL, 0,
+ REG_MDT_RCV_CTRL, 0
+ );
+ ctx->gen2_write_burst = 0;
+}
+
+static void sii8620_start_gen2_write_burst(struct sii8620 *ctx)
+{
+ sii8620_write_seq_static(ctx,
+ REG_MDT_INT_1_MASK, BIT_MDT_RCV_TIMEOUT
+ | BIT_MDT_RCV_SM_ABORT_PKT_RCVD | BIT_MDT_RCV_SM_ERROR
+ | BIT_MDT_XMIT_TIMEOUT | BIT_MDT_XMIT_SM_ABORT_PKT_RCVD
+ | BIT_MDT_XMIT_SM_ERROR,
+ REG_MDT_INT_0_MASK, BIT_MDT_XFIFO_EMPTY
+ | BIT_MDT_IDLE_AFTER_HAWB_DISABLE
+ | BIT_MDT_RFIFO_DATA_RDY
+ );
+ sii8620_enable_gen2_write_burst(ctx);
+}
+
+static void sii8620_mt_msc_cmd_send(struct sii8620 *ctx,
+ struct sii8620_mt_msg *msg)
+{
+ if (msg->reg[0] == MHL_SET_INT &&
+ msg->reg[1] == MHL_INT_REG(RCHANGE) &&
+ msg->reg[2] == MHL_INT_RC_FEAT_REQ)
+ sii8620_enable_gen2_write_burst(ctx);
+ else
+ sii8620_disable_gen2_write_burst(ctx);
+
+ switch (msg->reg[0]) {
+ case MHL_WRITE_STAT:
+ case MHL_SET_INT:
+ sii8620_write_buf(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg + 1, 2);
+ sii8620_write(ctx, REG_MSC_COMMAND_START,
+ BIT_MSC_COMMAND_START_WRITE_STAT);
+ break;
+ case MHL_MSC_MSG:
+ sii8620_write_buf(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg, 3);
+ sii8620_write(ctx, REG_MSC_COMMAND_START,
+ BIT_MSC_COMMAND_START_MSC_MSG);
+ break;
+ case MHL_READ_DEVCAP_REG:
+ case MHL_READ_XDEVCAP_REG:
+ sii8620_write(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg[1]);
+ sii8620_write(ctx, REG_MSC_COMMAND_START,
+ BIT_MSC_COMMAND_START_READ_DEVCAP);
+ break;
+ default:
+ dev_err(ctx->dev, "%s: command %#x not supported\n", __func__,
+ msg->reg[0]);
+ }
+}
+
+static struct sii8620_mt_msg *sii8620_mt_msg_new(struct sii8620 *ctx)
+{
+ struct sii8620_mt_msg *msg = kzalloc(sizeof(*msg), GFP_KERNEL);
+
+ if (!msg)
+ ctx->error = -ENOMEM;
+ else
+ list_add_tail(&msg->node, &ctx->mt_queue);
+
+ return msg;
+}
+
+static void sii8620_mt_set_cont(struct sii8620 *ctx, sii8620_cb cont)
+{
+ struct sii8620_mt_msg *msg;
+
+ if (ctx->error)
+ return;
+
+ if (list_empty(&ctx->mt_queue)) {
+ ctx->error = -EINVAL;
+ return;
+ }
+ msg = list_last_entry(&ctx->mt_queue, struct sii8620_mt_msg, node);
+ msg->continuation = cont;
+}
+
+static void sii8620_mt_msc_cmd(struct sii8620 *ctx, u8 cmd, u8 arg1, u8 arg2)
+{
+ struct sii8620_mt_msg *msg = sii8620_mt_msg_new(ctx);
+
+ if (!msg)
+ return;
+
+ msg->reg[0] = cmd;
+ msg->reg[1] = arg1;
+ msg->reg[2] = arg2;
+ msg->send = sii8620_mt_msc_cmd_send;
+}
+
+static void sii8620_mt_write_stat(struct sii8620 *ctx, u8 reg, u8 val)
+{
+ sii8620_mt_msc_cmd(ctx, MHL_WRITE_STAT, reg, val);
+}
+
+static inline void sii8620_mt_set_int(struct sii8620 *ctx, u8 irq, u8 mask)
+{
+ sii8620_mt_msc_cmd(ctx, MHL_SET_INT, irq, mask);
+}
+
+static void sii8620_mt_msc_msg(struct sii8620 *ctx, u8 cmd, u8 data)
+{
+ sii8620_mt_msc_cmd(ctx, MHL_MSC_MSG, cmd, data);
+}
+
+static void sii8620_mt_rap(struct sii8620 *ctx, u8 code)
+{
+ sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RAP, code);
+}
+
+static void sii8620_mt_rcpk(struct sii8620 *ctx, u8 code)
+{
+ sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RCPK, code);
+}
+
+static void sii8620_mt_rcpe(struct sii8620 *ctx, u8 code)
+{
+ sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RCPE, code);
+}
+
+static void sii8620_mt_read_devcap_send(struct sii8620 *ctx,
+ struct sii8620_mt_msg *msg)
+{
+ u8 ctrl = BIT_EDID_CTRL_DEVCAP_SELECT_DEVCAP
+ | BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO
+ | BIT_EDID_CTRL_EDID_MODE_EN;
+
+ if (msg->reg[0] == MHL_READ_XDEVCAP)
+ ctrl |= BIT_EDID_CTRL_XDEVCAP_EN;
+
+ sii8620_write_seq(ctx,
+ REG_INTR9_MASK, BIT_INTR9_DEVCAP_DONE,
+ REG_EDID_CTRL, ctrl,
+ REG_TPI_CBUS_START, BIT_TPI_CBUS_START_GET_DEVCAP_START
+ );
+}
+
+/* copy src to dst and set changed bits in src */
+static void sii8620_update_array(u8 *dst, u8 *src, int count)
+{
+ while (--count >= 0) {
+ *src ^= *dst;
+ *dst++ ^= *src++;
+ }
+}
+
+static void sii8620_identify_sink(struct sii8620 *ctx)
+{
+ static const char * const sink_str[] = {
+ [SINK_NONE] = "NONE",
+ [SINK_HDMI] = "HDMI",
+ [SINK_DVI] = "DVI"
+ };
+
+ char sink_name[20];
+ struct device *dev = ctx->dev;
+
+ if (!ctx->sink_detected || !ctx->devcap_read)
+ return;
+
+ sii8620_fetch_edid(ctx);
+ if (!ctx->edid) {
+ dev_err(ctx->dev, "Cannot fetch EDID\n");
+ sii8620_mhl_disconnected(ctx);
+ return;
+ }
+ sii8620_set_upstream_edid(ctx);
+
+ if (drm_detect_hdmi_monitor(ctx->edid))
+ ctx->sink_type = SINK_HDMI;
+ else
+ ctx->sink_type = SINK_DVI;
+
+ drm_edid_get_monitor_name(ctx->edid, sink_name, ARRAY_SIZE(sink_name));
+
+ dev_info(dev, "detected sink(type: %s): %s\n",
+ sink_str[ctx->sink_type], sink_name);
+}
+
+static void sii8620_mr_devcap(struct sii8620 *ctx)
+{
+ u8 dcap[MHL_DCAP_SIZE];
+ struct device *dev = ctx->dev;
+
+ sii8620_read_buf(ctx, REG_EDID_FIFO_RD_DATA, dcap, MHL_DCAP_SIZE);
+ if (ctx->error < 0)
+ return;
+
+ dev_info(dev, "detected dongle MHL %d.%d, ChipID %02x%02x:%02x%02x\n",
+ dcap[MHL_DCAP_MHL_VERSION] / 16,
+ dcap[MHL_DCAP_MHL_VERSION] % 16,
+ dcap[MHL_DCAP_ADOPTER_ID_H], dcap[MHL_DCAP_ADOPTER_ID_L],
+ dcap[MHL_DCAP_DEVICE_ID_H], dcap[MHL_DCAP_DEVICE_ID_L]);
+ sii8620_update_array(ctx->devcap, dcap, MHL_DCAP_SIZE);
+ ctx->devcap_read = true;
+ sii8620_identify_sink(ctx);
+}
+
+static void sii8620_mr_xdevcap(struct sii8620 *ctx)
+{
+ sii8620_read_buf(ctx, REG_EDID_FIFO_RD_DATA, ctx->xdevcap,
+ MHL_XDC_SIZE);
+}
+
+static void sii8620_mt_read_devcap_recv(struct sii8620 *ctx,
+ struct sii8620_mt_msg *msg)
+{
+ u8 ctrl = BIT_EDID_CTRL_DEVCAP_SELECT_DEVCAP
+ | BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO
+ | BIT_EDID_CTRL_EDID_MODE_EN;
+
+ if (msg->reg[0] == MHL_READ_XDEVCAP)
+ ctrl |= BIT_EDID_CTRL_XDEVCAP_EN;
+
+ sii8620_write_seq(ctx,
+ REG_INTR9_MASK, BIT_INTR9_DEVCAP_DONE | BIT_INTR9_EDID_DONE
+ | BIT_INTR9_EDID_ERROR,
+ REG_EDID_CTRL, ctrl,
+ REG_EDID_FIFO_ADDR, 0
+ );
+
+ if (msg->reg[0] == MHL_READ_XDEVCAP)
+ sii8620_mr_xdevcap(ctx);
+ else
+ sii8620_mr_devcap(ctx);
+}
+
+static void sii8620_mt_read_devcap(struct sii8620 *ctx, bool xdevcap)
+{
+ struct sii8620_mt_msg *msg = sii8620_mt_msg_new(ctx);
+
+ if (!msg)
+ return;
+
+ msg->reg[0] = xdevcap ? MHL_READ_XDEVCAP : MHL_READ_DEVCAP;
+ msg->send = sii8620_mt_read_devcap_send;
+ msg->recv = sii8620_mt_read_devcap_recv;
+}
+
+static void sii8620_mt_read_devcap_reg_recv(struct sii8620 *ctx,
+ struct sii8620_mt_msg *msg)
+{
+ u8 reg = msg->reg[1] & 0x7f;
+
+ if (msg->reg[1] & 0x80)
+ ctx->xdevcap[reg] = msg->ret;
+ else
+ ctx->devcap[reg] = msg->ret;
+}
+
+static void sii8620_mt_read_devcap_reg(struct sii8620 *ctx, u8 reg)
+{
+ struct sii8620_mt_msg *msg = sii8620_mt_msg_new(ctx);
+
+ if (!msg)
+ return;
+
+ msg->reg[0] = (reg & 0x80) ? MHL_READ_XDEVCAP_REG : MHL_READ_DEVCAP_REG;
+ msg->reg[1] = reg;
+ msg->send = sii8620_mt_msc_cmd_send;
+ msg->recv = sii8620_mt_read_devcap_reg_recv;
+}
+
+static inline void sii8620_mt_read_xdevcap_reg(struct sii8620 *ctx, u8 reg)
+{
+ sii8620_mt_read_devcap_reg(ctx, reg | 0x80);
+}
+
+static void *sii8620_burst_get_tx_buf(struct sii8620 *ctx, int len)
+{
+ u8 *buf = &ctx->burst.tx_buf[ctx->burst.tx_count];
+ int size = len + 2;
+
+ if (ctx->burst.tx_count + size >= ARRAY_SIZE(ctx->burst.tx_buf)) {
+ dev_err(ctx->dev, "TX-BLK buffer exhausted\n");
+ ctx->error = -EINVAL;
+ return NULL;
+ }
+
+ ctx->burst.tx_count += size;
+ buf[1] = len;
+
+ return buf + 2;
+}
+
+static u8 *sii8620_burst_get_rx_buf(struct sii8620 *ctx, int len)
+{
+ u8 *buf = &ctx->burst.rx_buf[ctx->burst.rx_count];
+ int size = len + 1;
+
+ if (ctx->burst.rx_count + size >= ARRAY_SIZE(ctx->burst.rx_buf)) {
+ dev_err(ctx->dev, "RX-BLK buffer exhausted\n");
+ ctx->error = -EINVAL;
+ return NULL;
+ }
+
+ ctx->burst.rx_count += size;
+ buf[0] = len;
+
+ return buf + 1;
+}
+
+static void sii8620_burst_send(struct sii8620 *ctx)
+{
+ int tx_left = ctx->burst.tx_count;
+ u8 *d = ctx->burst.tx_buf;
+
+ while (tx_left > 0) {
+ int len = d[1] + 2;
+
+ if (ctx->burst.r_count + len > ctx->burst.r_size)
+ break;
+ d[0] = min(ctx->burst.rx_ack, 255);
+ ctx->burst.rx_ack -= d[0];
+ sii8620_write_buf(ctx, REG_EMSC_XMIT_WRITE_PORT, d, len);
+ ctx->burst.r_count += len;
+ tx_left -= len;
+ d += len;
+ }
+
+ ctx->burst.tx_count = tx_left;
+
+ while (ctx->burst.rx_ack > 0) {
+ u8 b[2] = { min(ctx->burst.rx_ack, 255), 0 };
+
+ if (ctx->burst.r_count + 2 > ctx->burst.r_size)
+ break;
+ ctx->burst.rx_ack -= b[0];
+ sii8620_write_buf(ctx, REG_EMSC_XMIT_WRITE_PORT, b, 2);
+ ctx->burst.r_count += 2;
+ }
+}
+
+static void sii8620_burst_receive(struct sii8620 *ctx)
+{
+ u8 buf[3], *d;
+ int count;
+
+ sii8620_read_buf(ctx, REG_EMSCRFIFOBCNTL, buf, 2);
+ count = get_unaligned_le16(buf);
+ while (count > 0) {
+ int len = min(count, 3);
+
+ sii8620_read_buf(ctx, REG_EMSC_RCV_READ_PORT, buf, len);
+ count -= len;
+ ctx->burst.rx_ack += len - 1;
+ ctx->burst.r_count -= buf[1];
+ if (ctx->burst.r_count < 0)
+ ctx->burst.r_count = 0;
+
+ if (len < 3 || !buf[2])
+ continue;
+
+ len = buf[2];
+ d = sii8620_burst_get_rx_buf(ctx, len);
+ if (!d)
+ continue;
+ sii8620_read_buf(ctx, REG_EMSC_RCV_READ_PORT, d, len);
+ count -= len;
+ ctx->burst.rx_ack += len;
+ }
+}
+
+static void sii8620_burst_tx_rbuf_info(struct sii8620 *ctx, int size)
+{
+ struct mhl_burst_blk_rcv_buffer_info *d =
+ sii8620_burst_get_tx_buf(ctx, sizeof(*d));
+ if (!d)
+ return;
+
+ d->id = cpu_to_be16(MHL_BURST_ID_BLK_RCV_BUFFER_INFO);
+ d->size = cpu_to_le16(size);
+}
+
+static u8 sii8620_checksum(void *ptr, int size)
+{
+ u8 *d = ptr, sum = 0;
+
+ while (size--)
+ sum += *d++;
+
+ return sum;
+}
+
+static void sii8620_mhl_burst_hdr_set(struct mhl3_burst_header *h,
+ enum mhl_burst_id id)
+{
+ h->id = cpu_to_be16(id);
+ h->total_entries = 1;
+ h->sequence_index = 1;
+}
+
+static void sii8620_burst_tx_bits_per_pixel_fmt(struct sii8620 *ctx, u8 fmt)
+{
+ struct mhl_burst_bits_per_pixel_fmt *d;
+ const int size = sizeof(*d) + sizeof(d->desc[0]);
+
+ d = sii8620_burst_get_tx_buf(ctx, size);
+ if (!d)
+ return;
+
+ sii8620_mhl_burst_hdr_set(&d->hdr, MHL_BURST_ID_BITS_PER_PIXEL_FMT);
+ d->num_entries = 1;
+ d->desc[0].stream_id = 0;
+ d->desc[0].pixel_format = fmt;
+ d->hdr.checksum -= sii8620_checksum(d, size);
+}
+
+static void sii8620_burst_rx_all(struct sii8620 *ctx)
+{
+ u8 *d = ctx->burst.rx_buf;
+ int count = ctx->burst.rx_count;
+
+ while (count-- > 0) {
+ int len = *d++;
+ int id = get_unaligned_be16(&d[0]);
+
+ switch (id) {
+ case MHL_BURST_ID_BLK_RCV_BUFFER_INFO:
+ ctx->burst.r_size = get_unaligned_le16(&d[2]);
+ break;
+ default:
+ break;
+ }
+ count -= len;
+ d += len;
+ }
+ ctx->burst.rx_count = 0;
+}
+
+static void sii8620_fetch_edid(struct sii8620 *ctx)
+{
+ u8 lm_ddc, ddc_cmd, int3, cbus;
+ unsigned long timeout;
+ int fetched, i;
+ int edid_len = EDID_LENGTH;
+ u8 *edid;
+
+ sii8620_readb(ctx, REG_CBUS_STATUS);
+ lm_ddc = sii8620_readb(ctx, REG_LM_DDC);
+ ddc_cmd = sii8620_readb(ctx, REG_DDC_CMD);
+
+ sii8620_write_seq(ctx,
+ REG_INTR9_MASK, 0,
+ REG_EDID_CTRL, BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO,
+ REG_HDCP2X_POLL_CS, 0x71,
+ REG_HDCP2X_CTRL_0, BIT_HDCP2X_CTRL_0_HDCP2X_HDCPTX,
+ REG_LM_DDC, lm_ddc | BIT_LM_DDC_SW_TPI_EN_DISABLED,
+ );
+
+ for (i = 0; i < 256; ++i) {
+ u8 ddc_stat = sii8620_readb(ctx, REG_DDC_STATUS);
+
+ if (!(ddc_stat & BIT_DDC_STATUS_DDC_I2C_IN_PROG))
+ break;
+ sii8620_write(ctx, REG_DDC_STATUS,
+ BIT_DDC_STATUS_DDC_FIFO_EMPTY);
+ }
+
+ sii8620_write(ctx, REG_DDC_ADDR, 0x50 << 1);
+
+ edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
+ if (!edid) {
+ ctx->error = -ENOMEM;
+ return;
+ }
+
+#define FETCH_SIZE 16
+ for (fetched = 0; fetched < edid_len; fetched += FETCH_SIZE) {
+ sii8620_readb(ctx, REG_DDC_STATUS);
+ sii8620_write_seq(ctx,
+ REG_DDC_CMD, ddc_cmd | VAL_DDC_CMD_DDC_CMD_ABORT,
+ REG_DDC_CMD, ddc_cmd | VAL_DDC_CMD_DDC_CMD_CLEAR_FIFO,
+ REG_DDC_STATUS, BIT_DDC_STATUS_DDC_FIFO_EMPTY
+ );
+ sii8620_write_seq(ctx,
+ REG_DDC_SEGM, fetched >> 8,
+ REG_DDC_OFFSET, fetched & 0xff,
+ REG_DDC_DIN_CNT1, FETCH_SIZE,
+ REG_DDC_DIN_CNT2, 0,
+ REG_DDC_CMD, ddc_cmd | VAL_DDC_CMD_ENH_DDC_READ_NO_ACK
+ );
+
+ int3 = 0;
+ timeout = jiffies + msecs_to_jiffies(200);
+ for (;;) {
+ cbus = sii8620_readb(ctx, REG_CBUS_STATUS);
+ if (~cbus & BIT_CBUS_STATUS_CBUS_CONNECTED) {
+ kfree(edid);
+ edid = NULL;
+ goto end;
+ }
+ if (int3 & BIT_DDC_CMD_DONE) {
+ if (sii8620_readb(ctx, REG_DDC_DOUT_CNT)
+ >= FETCH_SIZE)
+ break;
+ } else {
+ int3 = sii8620_readb(ctx, REG_INTR3);
+ }
+ if (time_is_before_jiffies(timeout)) {
+ ctx->error = -ETIMEDOUT;
+ dev_err(ctx->dev, "timeout during EDID read\n");
+ kfree(edid);
+ edid = NULL;
+ goto end;
+ }
+ usleep_range(10, 20);
+ }
+
+ sii8620_read_buf(ctx, REG_DDC_DATA, edid + fetched, FETCH_SIZE);
+ if (fetched + FETCH_SIZE == EDID_LENGTH) {
+ u8 ext = ((struct edid *)edid)->extensions;
+
+ if (ext) {
+ u8 *new_edid;
+
+ edid_len += ext * EDID_LENGTH;
+ new_edid = krealloc(edid, edid_len, GFP_KERNEL);
+ if (!new_edid) {
+ kfree(edid);
+ ctx->error = -ENOMEM;
+ return;
+ }
+ edid = new_edid;
+ }
+ }
+ }
+
+ sii8620_write_seq(ctx,
+ REG_INTR3_MASK, BIT_DDC_CMD_DONE,
+ REG_LM_DDC, lm_ddc
+ );
+
+end:
+ kfree(ctx->edid);
+ ctx->edid = (struct edid *)edid;
+}
+
+static void sii8620_set_upstream_edid(struct sii8620 *ctx)
+{
+ sii8620_setbits(ctx, REG_DPD, BIT_DPD_PDNRX12 | BIT_DPD_PDIDCK_N
+ | BIT_DPD_PD_MHL_CLK_N, 0xff);
+
+ sii8620_write_seq_static(ctx,
+ REG_RX_HDMI_CTRL3, 0x00,
+ REG_PKT_FILTER_0, 0xFF,
+ REG_PKT_FILTER_1, 0xFF,
+ REG_ALICE0_BW_I2C, 0x06
+ );
+
+ sii8620_setbits(ctx, REG_RX_HDMI_CLR_BUFFER,
+ BIT_RX_HDMI_CLR_BUFFER_VSI_CLR_EN, 0xff);
+
+ sii8620_write_seq_static(ctx,
+ REG_EDID_CTRL, BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO
+ | BIT_EDID_CTRL_EDID_MODE_EN,
+ REG_EDID_FIFO_ADDR, 0,
+ );
+
+ sii8620_write_buf(ctx, REG_EDID_FIFO_WR_DATA, (u8 *)ctx->edid,
+ (ctx->edid->extensions + 1) * EDID_LENGTH);
+
+ sii8620_write_seq_static(ctx,
+ REG_EDID_CTRL, BIT_EDID_CTRL_EDID_PRIME_VALID
+ | BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO
+ | BIT_EDID_CTRL_EDID_MODE_EN,
+ REG_INTR5_MASK, BIT_INTR_SCDT_CHANGE,
+ REG_INTR9_MASK, 0
+ );
+}
+
+static void sii8620_xtal_set_rate(struct sii8620 *ctx)
+{
+ static const struct {
+ unsigned int rate;
+ u8 div;
+ u8 tp1;
+ } rates[] = {
+ { 19200, 0x04, 0x53 },
+ { 20000, 0x04, 0x62 },
+ { 24000, 0x05, 0x75 },
+ { 30000, 0x06, 0x92 },
+ { 38400, 0x0c, 0xbc },
+ };
+ unsigned long rate = clk_get_rate(ctx->clk_xtal) / 1000;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(rates) - 1; ++i)
+ if (rate <= rates[i].rate)
+ break;
+
+ if (rate != rates[i].rate)
+ dev_err(ctx->dev, "xtal clock rate(%lukHz) not supported, setting MHL for %ukHz.\n",
+ rate, rates[i].rate);
+
+ sii8620_write(ctx, REG_DIV_CTL_MAIN, rates[i].div);
+ sii8620_write(ctx, REG_HDCP2X_TP1, rates[i].tp1);
+}
+
+static int sii8620_hw_on(struct sii8620 *ctx)
+{
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+ if (ret)
+ return ret;
+
+ usleep_range(10000, 20000);
+ ret = clk_prepare_enable(ctx->clk_xtal);
+ if (ret)
+ return ret;
+
+ msleep(100);
+ gpiod_set_value(ctx->gpio_reset, 0);
+ msleep(100);
+
+ return 0;
+}
+
+static int sii8620_hw_off(struct sii8620 *ctx)
+{
+ clk_disable_unprepare(ctx->clk_xtal);
+ gpiod_set_value(ctx->gpio_reset, 1);
+ return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+}
+
+static void sii8620_cbus_reset(struct sii8620 *ctx)
+{
+ sii8620_write(ctx, REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST
+ | BIT_PWD_SRST_CBUS_RST_SW_EN);
+ usleep_range(10000, 20000);
+ sii8620_write(ctx, REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST_SW_EN);
+}
+
+static void sii8620_set_auto_zone(struct sii8620 *ctx)
+{
+ if (ctx->mode != CM_MHL1) {
+ sii8620_write_seq_static(ctx,
+ REG_TX_ZONE_CTL1, 0x0,
+ REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X
+ | BIT_MHL_PLL_CTL0_CRYSTAL_CLK_SEL
+ | BIT_MHL_PLL_CTL0_ZONE_MASK_OE
+ );
+ } else {
+ sii8620_write_seq_static(ctx,
+ REG_TX_ZONE_CTL1, VAL_TX_ZONE_CTL1_TX_ZONE_CTRL_MODE,
+ REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X
+ | BIT_MHL_PLL_CTL0_ZONE_MASK_OE
+ );
+ }
+}
+
+static void sii8620_stop_video(struct sii8620 *ctx)
+{
+ u8 val;
+
+ sii8620_write_seq_static(ctx,
+ REG_TPI_INTR_EN, 0,
+ REG_HDCP2X_INTR0_MASK, 0,
+ REG_TPI_COPP_DATA2, 0,
+ REG_TPI_INTR_ST0, ~0,
+ );
+
+ switch (ctx->sink_type) {
+ case SINK_DVI:
+ val = BIT_TPI_SC_REG_TMDS_OE_POWER_DOWN
+ | BIT_TPI_SC_TPI_AV_MUTE;
+ break;
+ case SINK_HDMI:
+ default:
+ val = BIT_TPI_SC_REG_TMDS_OE_POWER_DOWN
+ | BIT_TPI_SC_TPI_AV_MUTE
+ | BIT_TPI_SC_TPI_OUTPUT_MODE_0_HDMI;
+ break;
+ }
+
+ sii8620_write(ctx, REG_TPI_SC, val);
+}
+
+static void sii8620_set_format(struct sii8620 *ctx)
+{
+ u8 out_fmt;
+
+ if (sii8620_is_mhl3(ctx)) {
+ sii8620_setbits(ctx, REG_M3_P0CTRL,
+ BIT_M3_P0CTRL_MHL3_P0_PIXEL_MODE_PACKED,
+ ctx->use_packed_pixel ? ~0 : 0);
+ } else {
+ if (ctx->use_packed_pixel) {
+ sii8620_write_seq_static(ctx,
+ REG_VID_MODE, BIT_VID_MODE_M1080P,
+ REG_MHL_TOP_CTL, BIT_MHL_TOP_CTL_MHL_PP_SEL | 1,
+ REG_MHLTX_CTL6, 0x60
+ );
+ } else {
+ sii8620_write_seq_static(ctx,
+ REG_VID_MODE, 0,
+ REG_MHL_TOP_CTL, 1,
+ REG_MHLTX_CTL6, 0xa0
+ );
+ }
+ }
+
+ if (ctx->use_packed_pixel)
+ out_fmt = VAL_TPI_FORMAT(YCBCR422, FULL);
+ else
+ out_fmt = VAL_TPI_FORMAT(RGB, FULL);
+
+ sii8620_write_seq(ctx,
+ REG_TPI_INPUT, VAL_TPI_FORMAT(RGB, FULL),
+ REG_TPI_OUTPUT, out_fmt,
+ );
+}
+
+static int mhl3_infoframe_init(struct mhl3_infoframe *frame)
+{
+ memset(frame, 0, sizeof(*frame));
+
+ frame->version = 3;
+ frame->hev_format = -1;
+ return 0;
+}
+
+static ssize_t mhl3_infoframe_pack(struct mhl3_infoframe *frame,
+ void *buffer, size_t size)
+{
+ const int frm_len = HDMI_INFOFRAME_HEADER_SIZE + MHL3_INFOFRAME_SIZE;
+ u8 *ptr = buffer;
+
+ if (size < frm_len)
+ return -ENOSPC;
+
+ memset(buffer, 0, size);
+ ptr[0] = HDMI_INFOFRAME_TYPE_VENDOR;
+ ptr[1] = frame->version;
+ ptr[2] = MHL3_INFOFRAME_SIZE;
+ ptr[4] = MHL3_IEEE_OUI & 0xff;
+ ptr[5] = (MHL3_IEEE_OUI >> 8) & 0xff;
+ ptr[6] = (MHL3_IEEE_OUI >> 16) & 0xff;
+ ptr[7] = frame->video_format & 0x3;
+ ptr[7] |= (frame->format_type & 0x7) << 2;
+ ptr[7] |= frame->sep_audio ? BIT(5) : 0;
+ if (frame->hev_format >= 0) {
+ ptr[9] = 1;
+ ptr[10] = (frame->hev_format >> 8) & 0xff;
+ ptr[11] = frame->hev_format & 0xff;
+ }
+ if (frame->av_delay) {
+ bool sign = frame->av_delay < 0;
+ int delay = sign ? -frame->av_delay : frame->av_delay;
+
+ ptr[12] = (delay >> 16) & 0xf;
+ if (sign)
+ ptr[12] |= BIT(4);
+ ptr[13] = (delay >> 8) & 0xff;
+ ptr[14] = delay & 0xff;
+ }
+ ptr[3] -= sii8620_checksum(buffer, frm_len);
+ return frm_len;
+}
+
+static void sii8620_set_infoframes(struct sii8620 *ctx,
+ struct drm_display_mode *mode)
+{
+ struct mhl3_infoframe mhl_frm;
+ union hdmi_infoframe frm;
+ u8 buf[31];
+ int ret;
+
+ ret = drm_hdmi_avi_infoframe_from_display_mode(&frm.avi,
+ NULL, mode);
+ if (ctx->use_packed_pixel)
+ frm.avi.colorspace = HDMI_COLORSPACE_YUV422;
+
+ if (!ret)
+ ret = hdmi_avi_infoframe_pack(&frm.avi, buf, ARRAY_SIZE(buf));
+ if (ret > 0)
+ sii8620_write_buf(ctx, REG_TPI_AVI_CHSUM, buf + 3, ret - 3);
+
+ if (!sii8620_is_mhl3(ctx) || !ctx->use_packed_pixel) {
+ sii8620_write(ctx, REG_TPI_SC,
+ BIT_TPI_SC_TPI_OUTPUT_MODE_0_HDMI);
+ sii8620_write(ctx, REG_PKT_FILTER_0,
+ BIT_PKT_FILTER_0_DROP_CEA_GAMUT_PKT |
+ BIT_PKT_FILTER_0_DROP_MPEG_PKT |
+ BIT_PKT_FILTER_0_DROP_GCP_PKT,
+ BIT_PKT_FILTER_1_DROP_GEN_PKT);
+ return;
+ }
+
+ sii8620_write(ctx, REG_PKT_FILTER_0,
+ BIT_PKT_FILTER_0_DROP_CEA_GAMUT_PKT |
+ BIT_PKT_FILTER_0_DROP_MPEG_PKT |
+ BIT_PKT_FILTER_0_DROP_AVI_PKT |
+ BIT_PKT_FILTER_0_DROP_GCP_PKT,
+ BIT_PKT_FILTER_1_VSI_OVERRIDE_DIS |
+ BIT_PKT_FILTER_1_DROP_GEN_PKT |
+ BIT_PKT_FILTER_1_DROP_VSIF_PKT);
+
+ sii8620_write(ctx, REG_TPI_INFO_FSEL, BIT_TPI_INFO_FSEL_EN
+ | BIT_TPI_INFO_FSEL_RPT | VAL_TPI_INFO_FSEL_VSI);
+ ret = mhl3_infoframe_init(&mhl_frm);
+ if (!ret)
+ ret = mhl3_infoframe_pack(&mhl_frm, buf, ARRAY_SIZE(buf));
+ sii8620_write_buf(ctx, REG_TPI_INFO_B0, buf, ret);
+}
+
+static void sii8620_start_video(struct sii8620 *ctx)
+{
+ struct drm_display_mode *mode =
+ &ctx->bridge.encoder->crtc->state->adjusted_mode;
+
+ if (!sii8620_is_mhl3(ctx))
+ sii8620_stop_video(ctx);
+
+ if (ctx->sink_type == SINK_DVI && !sii8620_is_mhl3(ctx)) {
+ sii8620_write(ctx, REG_RX_HDMI_CTRL2,
+ VAL_RX_HDMI_CTRL2_DEFVAL);
+ sii8620_write(ctx, REG_TPI_SC, 0);
+ return;
+ }
+
+ sii8620_write_seq_static(ctx,
+ REG_RX_HDMI_CTRL2, VAL_RX_HDMI_CTRL2_DEFVAL
+ | BIT_RX_HDMI_CTRL2_USE_AV_MUTE,
+ REG_VID_OVRRD, BIT_VID_OVRRD_PP_AUTO_DISABLE
+ | BIT_VID_OVRRD_M1080P_OVRRD);
+ sii8620_set_format(ctx);
+
+ if (!sii8620_is_mhl3(ctx)) {
+ u8 link_mode = MHL_DST_LM_PATH_ENABLED;
+
+ if (ctx->use_packed_pixel)
+ link_mode |= MHL_DST_LM_CLK_MODE_PACKED_PIXEL;
+ else
+ link_mode |= MHL_DST_LM_CLK_MODE_NORMAL;
+
+ sii8620_mt_write_stat(ctx, MHL_DST_REG(LINK_MODE), link_mode);
+ sii8620_set_auto_zone(ctx);
+ } else {
+ static const struct {
+ int max_clk;
+ u8 zone;
+ u8 link_rate;
+ u8 rrp_decode;
+ } clk_spec[] = {
+ { 150000, VAL_TX_ZONE_CTL3_TX_ZONE_1_5GBPS,
+ MHL_XDS_LINK_RATE_1_5_GBPS, 0x38 },
+ { 300000, VAL_TX_ZONE_CTL3_TX_ZONE_3GBPS,
+ MHL_XDS_LINK_RATE_3_0_GBPS, 0x40 },
+ { 600000, VAL_TX_ZONE_CTL3_TX_ZONE_6GBPS,
+ MHL_XDS_LINK_RATE_6_0_GBPS, 0x40 },
+ };
+ u8 p0_ctrl = BIT_M3_P0CTRL_MHL3_P0_PORT_EN;
+ int clk = mode->clock * (ctx->use_packed_pixel ? 2 : 3);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(clk_spec) - 1; ++i)
+ if (clk < clk_spec[i].max_clk)
+ break;
+
+ if (100 * clk >= 98 * clk_spec[i].max_clk)
+ p0_ctrl |= BIT_M3_P0CTRL_MHL3_P0_UNLIMIT_EN;
+
+ sii8620_burst_tx_bits_per_pixel_fmt(ctx, ctx->use_packed_pixel);
+ sii8620_burst_send(ctx);
+ sii8620_write_seq(ctx,
+ REG_MHL_DP_CTL0, 0xf0,
+ REG_MHL3_TX_ZONE_CTL, clk_spec[i].zone);
+ sii8620_setbits(ctx, REG_M3_P0CTRL,
+ BIT_M3_P0CTRL_MHL3_P0_PORT_EN
+ | BIT_M3_P0CTRL_MHL3_P0_UNLIMIT_EN, p0_ctrl);
+ sii8620_setbits(ctx, REG_M3_POSTM, MSK_M3_POSTM_RRP_DECODE,
+ clk_spec[i].rrp_decode);
+ sii8620_write_seq_static(ctx,
+ REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE
+ | BIT_M3_CTRL_H2M_SWRST,
+ REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE
+ );
+ sii8620_mt_write_stat(ctx, MHL_XDS_REG(AVLINK_MODE_CONTROL),
+ clk_spec[i].link_rate);
+ }
+
+ sii8620_set_infoframes(ctx, mode);
+}
+
+static void sii8620_disable_hpd(struct sii8620 *ctx)
+{
+ sii8620_setbits(ctx, REG_EDID_CTRL, BIT_EDID_CTRL_EDID_PRIME_VALID, 0);
+ sii8620_write_seq_static(ctx,
+ REG_HPD_CTRL, BIT_HPD_CTRL_HPD_OUT_OVR_EN,
+ REG_INTR8_MASK, 0
+ );
+}
+
+static void sii8620_enable_hpd(struct sii8620 *ctx)
+{
+ sii8620_setbits(ctx, REG_TMDS_CSTAT_P3,
+ BIT_TMDS_CSTAT_P3_SCDT_CLR_AVI_DIS
+ | BIT_TMDS_CSTAT_P3_CLR_AVI, ~0);
+ sii8620_write_seq_static(ctx,
+ REG_HPD_CTRL, BIT_HPD_CTRL_HPD_OUT_OVR_EN
+ | BIT_HPD_CTRL_HPD_HIGH,
+ );
+}
+
+static void sii8620_mhl_discover(struct sii8620 *ctx)
+{
+ sii8620_write_seq_static(ctx,
+ REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT
+ | BIT_DISC_CTRL9_DISC_PULSE_PROCEED,
+ REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_5K, VAL_PUP_20K),
+ REG_CBUS_DISC_INTR0_MASK, BIT_MHL3_EST_INT
+ | BIT_MHL_EST_INT
+ | BIT_NOT_MHL_EST_INT
+ | BIT_CBUS_MHL3_DISCON_INT
+ | BIT_CBUS_MHL12_DISCON_INT
+ | BIT_RGND_READY_INT,
+ REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X
+ | BIT_MHL_PLL_CTL0_CRYSTAL_CLK_SEL
+ | BIT_MHL_PLL_CTL0_ZONE_MASK_OE,
+ REG_MHL_DP_CTL0, BIT_MHL_DP_CTL0_DP_OE
+ | BIT_MHL_DP_CTL0_TX_OE_OVR,
+ REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE,
+ REG_MHL_DP_CTL1, 0xA2,
+ REG_MHL_DP_CTL2, 0x03,
+ REG_MHL_DP_CTL3, 0x35,
+ REG_MHL_DP_CTL5, 0x02,
+ REG_MHL_DP_CTL6, 0x02,
+ REG_MHL_DP_CTL7, 0x03,
+ REG_COC_CTLC, 0xFF,
+ REG_DPD, BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12
+ | BIT_DPD_OSC_EN | BIT_DPD_PWRON_HSIC,
+ REG_COC_INTR_MASK, BIT_COC_PLL_LOCK_STATUS_CHANGE
+ | BIT_COC_CALIBRATION_DONE,
+ REG_CBUS_INT_1_MASK, BIT_CBUS_MSC_ABORT_RCVD
+ | BIT_CBUS_CMD_ABORT,
+ REG_CBUS_INT_0_MASK, BIT_CBUS_MSC_MT_DONE
+ | BIT_CBUS_HPD_CHG
+ | BIT_CBUS_MSC_MR_WRITE_STAT
+ | BIT_CBUS_MSC_MR_MSC_MSG
+ | BIT_CBUS_MSC_MR_WRITE_BURST
+ | BIT_CBUS_MSC_MR_SET_INT
+ | BIT_CBUS_MSC_MT_DONE_NACK
+ );
+}
+
+static void sii8620_peer_specific_init(struct sii8620 *ctx)
+{
+ if (sii8620_is_mhl3(ctx))
+ sii8620_write_seq_static(ctx,
+ REG_SYS_CTRL1, BIT_SYS_CTRL1_BLOCK_DDC_BY_HPD,
+ REG_EMSCINTRMASK1,
+ BIT_EMSCINTR1_EMSC_TRAINING_COMMA_ERR
+ );
+ else
+ sii8620_write_seq_static(ctx,
+ REG_HDCP2X_INTR0_MASK, 0x00,
+ REG_EMSCINTRMASK1, 0x00,
+ REG_HDCP2X_INTR0, 0xFF,
+ REG_INTR1, 0xFF,
+ REG_SYS_CTRL1, BIT_SYS_CTRL1_BLOCK_DDC_BY_HPD
+ | BIT_SYS_CTRL1_TX_CTRL_HDMI
+ );
+}
+
+#define SII8620_MHL_VERSION 0x32
+#define SII8620_SCRATCHPAD_SIZE 16
+#define SII8620_INT_STAT_SIZE 0x33
+
+static void sii8620_set_dev_cap(struct sii8620 *ctx)
+{
+ static const u8 devcap[MHL_DCAP_SIZE] = {
+ [MHL_DCAP_MHL_VERSION] = SII8620_MHL_VERSION,
+ [MHL_DCAP_CAT] = MHL_DCAP_CAT_SOURCE | MHL_DCAP_CAT_POWER,
+ [MHL_DCAP_ADOPTER_ID_H] = 0x01,
+ [MHL_DCAP_ADOPTER_ID_L] = 0x41,
+ [MHL_DCAP_VID_LINK_MODE] = MHL_DCAP_VID_LINK_RGB444
+ | MHL_DCAP_VID_LINK_PPIXEL
+ | MHL_DCAP_VID_LINK_16BPP,
+ [MHL_DCAP_AUD_LINK_MODE] = MHL_DCAP_AUD_LINK_2CH,
+ [MHL_DCAP_VIDEO_TYPE] = MHL_DCAP_VT_GRAPHICS,
+ [MHL_DCAP_LOG_DEV_MAP] = MHL_DCAP_LD_GUI,
+ [MHL_DCAP_BANDWIDTH] = 0x0f,
+ [MHL_DCAP_FEATURE_FLAG] = MHL_DCAP_FEATURE_RCP_SUPPORT
+ | MHL_DCAP_FEATURE_RAP_SUPPORT
+ | MHL_DCAP_FEATURE_SP_SUPPORT,
+ [MHL_DCAP_SCRATCHPAD_SIZE] = SII8620_SCRATCHPAD_SIZE,
+ [MHL_DCAP_INT_STAT_SIZE] = SII8620_INT_STAT_SIZE,
+ };
+ static const u8 xdcap[MHL_XDC_SIZE] = {
+ [MHL_XDC_ECBUS_SPEEDS] = MHL_XDC_ECBUS_S_075
+ | MHL_XDC_ECBUS_S_8BIT,
+ [MHL_XDC_TMDS_SPEEDS] = MHL_XDC_TMDS_150
+ | MHL_XDC_TMDS_300 | MHL_XDC_TMDS_600,
+ [MHL_XDC_ECBUS_ROLES] = MHL_XDC_DEV_HOST,
+ [MHL_XDC_LOG_DEV_MAPX] = MHL_XDC_LD_PHONE,
+ };
+
+ sii8620_write_buf(ctx, REG_MHL_DEVCAP_0, devcap, ARRAY_SIZE(devcap));
+ sii8620_write_buf(ctx, REG_MHL_EXTDEVCAP_0, xdcap, ARRAY_SIZE(xdcap));
+}
+
+static void sii8620_mhl_init(struct sii8620 *ctx)
+{
+ sii8620_write_seq_static(ctx,
+ REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_OFF, VAL_PUP_20K),
+ REG_CBUS_MSC_COMPAT_CTRL,
+ BIT_CBUS_MSC_COMPAT_CTRL_XDEVCAP_EN,
+ );
+
+ sii8620_peer_specific_init(ctx);
+
+ sii8620_disable_hpd(ctx);
+
+ sii8620_write_seq_static(ctx,
+ REG_EDID_CTRL, BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO,
+ REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT
+ | BIT_DISC_CTRL9_WAKE_PULSE_BYPASS,
+ REG_TMDS0_CCTRL1, 0x90,
+ REG_TMDS_CLK_EN, 0x01,
+ REG_TMDS_CH_EN, 0x11,
+ REG_BGR_BIAS, 0x87,
+ REG_ALICE0_ZONE_CTRL, 0xE8,
+ REG_ALICE0_MODE_CTRL, 0x04,
+ );
+ sii8620_setbits(ctx, REG_LM_DDC, BIT_LM_DDC_SW_TPI_EN_DISABLED, 0);
+ sii8620_write_seq_static(ctx,
+ REG_TPI_HW_OPT3, 0x76,
+ REG_TMDS_CCTRL, BIT_TMDS_CCTRL_TMDS_OE,
+ REG_TPI_DTD_B2, 79,
+ );
+ sii8620_set_dev_cap(ctx);
+ sii8620_write_seq_static(ctx,
+ REG_MDT_XMIT_TIMEOUT, 100,
+ REG_MDT_XMIT_CTRL, 0x03,
+ REG_MDT_XFIFO_STAT, 0x00,
+ REG_MDT_RCV_TIMEOUT, 100,
+ REG_CBUS_LINK_CTRL_8, 0x1D,
+ );
+
+ sii8620_start_gen2_write_burst(ctx);
+ sii8620_write_seq_static(ctx,
+ REG_BIST_CTRL, 0x00,
+ REG_COC_CTL1, 0x10,
+ REG_COC_CTL2, 0x18,
+ REG_COC_CTLF, 0x07,
+ REG_COC_CTL11, 0xF8,
+ REG_COC_CTL17, 0x61,
+ REG_COC_CTL18, 0x46,
+ REG_COC_CTL19, 0x15,
+ REG_COC_CTL1A, 0x01,
+ REG_MHL_COC_CTL3, BIT_MHL_COC_CTL3_COC_AECHO_EN,
+ REG_MHL_COC_CTL4, 0x2D,
+ REG_MHL_COC_CTL5, 0xF9,
+ REG_MSC_HEARTBEAT_CTRL, 0x27,
+ );
+ sii8620_disable_gen2_write_burst(ctx);
+
+ sii8620_mt_write_stat(ctx, MHL_DST_REG(VERSION), SII8620_MHL_VERSION);
+ sii8620_mt_write_stat(ctx, MHL_DST_REG(CONNECTED_RDY),
+ MHL_DST_CONN_DCAP_RDY | MHL_DST_CONN_XDEVCAPP_SUPP
+ | MHL_DST_CONN_POW_STAT);
+ sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE), MHL_INT_RC_DCAP_CHG);
+}
+
+static void sii8620_emsc_enable(struct sii8620 *ctx)
+{
+ u8 reg;
+
+ sii8620_setbits(ctx, REG_GENCTL, BIT_GENCTL_EMSC_EN
+ | BIT_GENCTL_CLR_EMSC_RFIFO
+ | BIT_GENCTL_CLR_EMSC_XFIFO, ~0);
+ sii8620_setbits(ctx, REG_GENCTL, BIT_GENCTL_CLR_EMSC_RFIFO
+ | BIT_GENCTL_CLR_EMSC_XFIFO, 0);
+ sii8620_setbits(ctx, REG_COMMECNT, BIT_COMMECNT_I2C_TO_EMSC_EN, ~0);
+ reg = sii8620_readb(ctx, REG_EMSCINTR);
+ sii8620_write(ctx, REG_EMSCINTR, reg);
+ sii8620_write(ctx, REG_EMSCINTRMASK, BIT_EMSCINTR_SPI_DVLD);
+}
+
+static int sii8620_wait_for_fsm_state(struct sii8620 *ctx, u8 state)
+{
+ int i;
+
+ for (i = 0; i < 10; ++i) {
+ u8 s = sii8620_readb(ctx, REG_COC_STAT_0);
+
+ if ((s & MSK_COC_STAT_0_FSM_STATE) == state)
+ return 0;
+ if (!(s & BIT_COC_STAT_0_PLL_LOCKED))
+ return -EBUSY;
+ usleep_range(4000, 6000);
+ }
+ return -ETIMEDOUT;
+}
+
+static void sii8620_set_mode(struct sii8620 *ctx, enum sii8620_mode mode)
+{
+ int ret;
+
+ if (ctx->mode == mode)
+ return;
+
+ switch (mode) {
+ case CM_MHL1:
+ sii8620_write_seq_static(ctx,
+ REG_CBUS_MSC_COMPAT_CTRL, 0x02,
+ REG_M3_CTRL, VAL_M3_CTRL_MHL1_2_VALUE,
+ REG_DPD, BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12
+ | BIT_DPD_OSC_EN,
+ REG_COC_INTR_MASK, 0
+ );
+ ctx->mode = mode;
+ break;
+ case CM_MHL3:
+ sii8620_write(ctx, REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE);
+ ctx->mode = mode;
+ return;
+ case CM_ECBUS_S:
+ sii8620_emsc_enable(ctx);
+ sii8620_write_seq_static(ctx,
+ REG_TTXSPINUMS, 4,
+ REG_TRXSPINUMS, 4,
+ REG_TTXHSICNUMS, 0x14,
+ REG_TRXHSICNUMS, 0x14,
+ REG_TTXTOTNUMS, 0x18,
+ REG_TRXTOTNUMS, 0x18,
+ REG_PWD_SRST, BIT_PWD_SRST_COC_DOC_RST
+ | BIT_PWD_SRST_CBUS_RST_SW_EN,
+ REG_MHL_COC_CTL1, 0xbd,
+ REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST_SW_EN,
+ REG_COC_CTLB, 0x01,
+ REG_COC_CTL0, 0x5c,
+ REG_COC_CTL14, 0x03,
+ REG_COC_CTL15, 0x80,
+ REG_MHL_DP_CTL6, BIT_MHL_DP_CTL6_DP_TAP1_SGN
+ | BIT_MHL_DP_CTL6_DP_TAP1_EN
+ | BIT_MHL_DP_CTL6_DT_PREDRV_FEEDCAP_EN,
+ REG_MHL_DP_CTL8, 0x03
+ );
+ ret = sii8620_wait_for_fsm_state(ctx, 0x03);
+ sii8620_write_seq_static(ctx,
+ REG_COC_CTL14, 0x00,
+ REG_COC_CTL15, 0x80
+ );
+ if (!ret)
+ sii8620_write(ctx, REG_CBUS3_CNVT, 0x85);
+ else
+ sii8620_disconnect(ctx);
+ return;
+ case CM_DISCONNECTED:
+ ctx->mode = mode;
+ break;
+ default:
+ dev_err(ctx->dev, "%s mode %d not supported\n", __func__, mode);
+ break;
+ }
+
+ sii8620_set_auto_zone(ctx);
+
+ if (mode != CM_MHL1)
+ return;
+
+ sii8620_write_seq_static(ctx,
+ REG_MHL_DP_CTL0, 0xBC,
+ REG_MHL_DP_CTL1, 0xBB,
+ REG_MHL_DP_CTL3, 0x48,
+ REG_MHL_DP_CTL5, 0x39,
+ REG_MHL_DP_CTL2, 0x2A,
+ REG_MHL_DP_CTL6, 0x2A,
+ REG_MHL_DP_CTL7, 0x08
+ );
+}
+
+static void sii8620_hpd_unplugged(struct sii8620 *ctx)
+{
+ sii8620_disable_hpd(ctx);
+ ctx->sink_type = SINK_NONE;
+ ctx->sink_detected = false;
+ ctx->feature_complete = false;
+ kfree(ctx->edid);
+ ctx->edid = NULL;
+}
+
+static void sii8620_disconnect(struct sii8620 *ctx)
+{
+ sii8620_disable_gen2_write_burst(ctx);
+ sii8620_stop_video(ctx);
+ msleep(100);
+ sii8620_cbus_reset(ctx);
+ sii8620_set_mode(ctx, CM_DISCONNECTED);
+ sii8620_write_seq_static(ctx,
+ REG_TX_ZONE_CTL1, 0,
+ REG_MHL_PLL_CTL0, 0x07,
+ REG_COC_CTL0, 0x40,
+ REG_CBUS3_CNVT, 0x84,
+ REG_COC_CTL14, 0x00,
+ REG_COC_CTL0, 0x40,
+ REG_HRXCTRL3, 0x07,
+ REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X
+ | BIT_MHL_PLL_CTL0_CRYSTAL_CLK_SEL
+ | BIT_MHL_PLL_CTL0_ZONE_MASK_OE,
+ REG_MHL_DP_CTL0, BIT_MHL_DP_CTL0_DP_OE
+ | BIT_MHL_DP_CTL0_TX_OE_OVR,
+ REG_MHL_DP_CTL1, 0xBB,
+ REG_MHL_DP_CTL3, 0x48,
+ REG_MHL_DP_CTL5, 0x3F,
+ REG_MHL_DP_CTL2, 0x2F,
+ REG_MHL_DP_CTL6, 0x2A,
+ REG_MHL_DP_CTL7, 0x03
+ );
+ sii8620_hpd_unplugged(ctx);
+ sii8620_write_seq_static(ctx,
+ REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE,
+ REG_MHL_COC_CTL1, 0x07,
+ REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_OFF, VAL_PUP_20K),
+ REG_DISC_CTRL8, 0x00,
+ REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT
+ | BIT_DISC_CTRL9_WAKE_PULSE_BYPASS,
+ REG_INT_CTRL, 0x00,
+ REG_MSC_HEARTBEAT_CTRL, 0x27,
+ REG_DISC_CTRL1, 0x25,
+ REG_CBUS_DISC_INTR0, (u8)~BIT_RGND_READY_INT,
+ REG_CBUS_DISC_INTR0_MASK, BIT_RGND_READY_INT,
+ REG_MDT_INT_1, 0xff,
+ REG_MDT_INT_1_MASK, 0x00,
+ REG_MDT_INT_0, 0xff,
+ REG_MDT_INT_0_MASK, 0x00,
+ REG_COC_INTR, 0xff,
+ REG_COC_INTR_MASK, 0x00,
+ REG_TRXINTH, 0xff,
+ REG_TRXINTMH, 0x00,
+ REG_CBUS_INT_0, 0xff,
+ REG_CBUS_INT_0_MASK, 0x00,
+ REG_CBUS_INT_1, 0xff,
+ REG_CBUS_INT_1_MASK, 0x00,
+ REG_EMSCINTR, 0xff,
+ REG_EMSCINTRMASK, 0x00,
+ REG_EMSCINTR1, 0xff,
+ REG_EMSCINTRMASK1, 0x00,
+ REG_INTR8, 0xff,
+ REG_INTR8_MASK, 0x00,
+ REG_TPI_INTR_ST0, 0xff,
+ REG_TPI_INTR_EN, 0x00,
+ REG_HDCP2X_INTR0, 0xff,
+ REG_HDCP2X_INTR0_MASK, 0x00,
+ REG_INTR9, 0xff,
+ REG_INTR9_MASK, 0x00,
+ REG_INTR3, 0xff,
+ REG_INTR3_MASK, 0x00,
+ REG_INTR5, 0xff,
+ REG_INTR5_MASK, 0x00,
+ REG_INTR2, 0xff,
+ REG_INTR2_MASK, 0x00,
+ );
+ memset(ctx->stat, 0, sizeof(ctx->stat));
+ memset(ctx->xstat, 0, sizeof(ctx->xstat));
+ memset(ctx->devcap, 0, sizeof(ctx->devcap));
+ memset(ctx->xdevcap, 0, sizeof(ctx->xdevcap));
+ ctx->devcap_read = false;
+ ctx->cbus_status = 0;
+ sii8620_mt_cleanup(ctx);
+}
+
+static void sii8620_mhl_disconnected(struct sii8620 *ctx)
+{
+ sii8620_write_seq_static(ctx,
+ REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_OFF, VAL_PUP_20K),
+ REG_CBUS_MSC_COMPAT_CTRL,
+ BIT_CBUS_MSC_COMPAT_CTRL_XDEVCAP_EN
+ );
+ sii8620_disconnect(ctx);
+}
+
+static void sii8620_irq_disc(struct sii8620 *ctx)
+{
+ u8 stat = sii8620_readb(ctx, REG_CBUS_DISC_INTR0);
+
+ if (stat & VAL_CBUS_MHL_DISCON)
+ sii8620_mhl_disconnected(ctx);
+
+ if (stat & BIT_RGND_READY_INT) {
+ u8 stat2 = sii8620_readb(ctx, REG_DISC_STAT2);
+
+ if ((stat2 & MSK_DISC_STAT2_RGND) == VAL_RGND_1K) {
+ sii8620_mhl_discover(ctx);
+ } else {
+ sii8620_write_seq_static(ctx,
+ REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT
+ | BIT_DISC_CTRL9_NOMHL_EST
+ | BIT_DISC_CTRL9_WAKE_PULSE_BYPASS,
+ REG_CBUS_DISC_INTR0_MASK, BIT_RGND_READY_INT
+ | BIT_CBUS_MHL3_DISCON_INT
+ | BIT_CBUS_MHL12_DISCON_INT
+ | BIT_NOT_MHL_EST_INT
+ );
+ }
+ }
+ if (stat & BIT_MHL_EST_INT)
+ sii8620_mhl_init(ctx);
+
+ sii8620_write(ctx, REG_CBUS_DISC_INTR0, stat);
+}
+
+static void sii8620_read_burst(struct sii8620 *ctx)
+{
+ u8 buf[17];
+
+ sii8620_read_buf(ctx, REG_MDT_RCV_READ_PORT, buf, ARRAY_SIZE(buf));
+ sii8620_write(ctx, REG_MDT_RCV_CTRL, BIT_MDT_RCV_CTRL_MDT_RCV_EN |
+ BIT_MDT_RCV_CTRL_MDT_DELAY_RCV_EN |
+ BIT_MDT_RCV_CTRL_MDT_RFIFO_CLR_CUR);
+ sii8620_readb(ctx, REG_MDT_RFIFO_STAT);
+}
+
+static void sii8620_irq_g2wb(struct sii8620 *ctx)
+{
+ u8 stat = sii8620_readb(ctx, REG_MDT_INT_0);
+
+ if (stat & BIT_MDT_IDLE_AFTER_HAWB_DISABLE)
+ if (sii8620_is_mhl3(ctx))
+ sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE),
+ MHL_INT_RC_FEAT_COMPLETE);
+
+ if (stat & BIT_MDT_RFIFO_DATA_RDY)
+ sii8620_read_burst(ctx);
+
+ if (stat & BIT_MDT_XFIFO_EMPTY)
+ sii8620_write(ctx, REG_MDT_XMIT_CTRL, 0);
+
+ sii8620_write(ctx, REG_MDT_INT_0, stat);
+}
+
+static void sii8620_status_dcap_ready(struct sii8620 *ctx)
+{
+ enum sii8620_mode mode;
+
+ mode = ctx->stat[MHL_DST_VERSION] >= 0x30 ? CM_MHL3 : CM_MHL1;
+ if (mode > ctx->mode)
+ sii8620_set_mode(ctx, mode);
+ sii8620_peer_specific_init(ctx);
+ sii8620_write(ctx, REG_INTR9_MASK, BIT_INTR9_DEVCAP_DONE
+ | BIT_INTR9_EDID_DONE | BIT_INTR9_EDID_ERROR);
+}
+
+static void sii8620_status_changed_path(struct sii8620 *ctx)
+{
+ u8 link_mode;
+
+ if (ctx->use_packed_pixel)
+ link_mode = MHL_DST_LM_CLK_MODE_PACKED_PIXEL;
+ else
+ link_mode = MHL_DST_LM_CLK_MODE_NORMAL;
+
+ if (ctx->stat[MHL_DST_LINK_MODE] & MHL_DST_LM_PATH_ENABLED)
+ link_mode |= MHL_DST_LM_PATH_ENABLED;
+
+ sii8620_mt_write_stat(ctx, MHL_DST_REG(LINK_MODE),
+ link_mode);
+}
+
+static void sii8620_msc_mr_write_stat(struct sii8620 *ctx)
+{
+ u8 st[MHL_DST_SIZE], xst[MHL_XDS_SIZE];
+
+ sii8620_read_buf(ctx, REG_MHL_STAT_0, st, MHL_DST_SIZE);
+ sii8620_read_buf(ctx, REG_MHL_EXTSTAT_0, xst, MHL_XDS_SIZE);
+
+ sii8620_update_array(ctx->stat, st, MHL_DST_SIZE);
+ sii8620_update_array(ctx->xstat, xst, MHL_XDS_SIZE);
+
+ if (ctx->stat[MHL_DST_CONNECTED_RDY] & st[MHL_DST_CONNECTED_RDY] &
+ MHL_DST_CONN_DCAP_RDY) {
+ sii8620_status_dcap_ready(ctx);
+
+ if (!sii8620_is_mhl3(ctx))
+ sii8620_mt_read_devcap(ctx, false);
+ }
+
+ if (st[MHL_DST_LINK_MODE] & MHL_DST_LM_PATH_ENABLED)
+ sii8620_status_changed_path(ctx);
+}
+
+static void sii8620_ecbus_up(struct sii8620 *ctx, int ret)
+{
+ if (ret < 0)
+ return;
+
+ sii8620_set_mode(ctx, CM_ECBUS_S);
+}
+
+static void sii8620_got_ecbus_speed(struct sii8620 *ctx, int ret)
+{
+ if (ret < 0)
+ return;
+
+ sii8620_mt_write_stat(ctx, MHL_XDS_REG(CURR_ECBUS_MODE),
+ MHL_XDS_ECBUS_S | MHL_XDS_SLOT_MODE_8BIT);
+ sii8620_mt_rap(ctx, MHL_RAP_CBUS_MODE_UP);
+ sii8620_mt_set_cont(ctx, sii8620_ecbus_up);
+}
+
+static void sii8620_mhl_burst_emsc_support_set(struct mhl_burst_emsc_support *d,
+ enum mhl_burst_id id)
+{
+ sii8620_mhl_burst_hdr_set(&d->hdr, MHL_BURST_ID_EMSC_SUPPORT);
+ d->num_entries = 1;
+ d->burst_id[0] = cpu_to_be16(id);
+}
+
+static void sii8620_send_features(struct sii8620 *ctx)
+{
+ u8 buf[16];
+
+ sii8620_write(ctx, REG_MDT_XMIT_CTRL, BIT_MDT_XMIT_CTRL_EN
+ | BIT_MDT_XMIT_CTRL_FIXED_BURST_LEN);
+ sii8620_mhl_burst_emsc_support_set((void *)buf,
+ MHL_BURST_ID_HID_PAYLOAD);
+ sii8620_write_buf(ctx, REG_MDT_XMIT_WRITE_PORT, buf, ARRAY_SIZE(buf));
+}
+
+static bool sii8620_rcp_consume(struct sii8620 *ctx, u8 scancode)
+{
+ bool pressed = !(scancode & MHL_RCP_KEY_RELEASED_MASK);
+
+ scancode &= MHL_RCP_KEY_ID_MASK;
+
+ if (!IS_ENABLED(CONFIG_RC_CORE) || !ctx->rc_dev)
+ return false;
+
+ if (pressed)
+ rc_keydown(ctx->rc_dev, RC_PROTO_CEC, scancode, 0);
+ else
+ rc_keyup(ctx->rc_dev);
+
+ return true;
+}
+
+static void sii8620_msc_mr_set_int(struct sii8620 *ctx)
+{
+ u8 ints[MHL_INT_SIZE];
+
+ sii8620_read_buf(ctx, REG_MHL_INT_0, ints, MHL_INT_SIZE);
+ sii8620_write_buf(ctx, REG_MHL_INT_0, ints, MHL_INT_SIZE);
+
+ if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_DCAP_CHG) {
+ switch (ctx->mode) {
+ case CM_MHL3:
+ sii8620_mt_read_xdevcap_reg(ctx, MHL_XDC_ECBUS_SPEEDS);
+ sii8620_mt_set_cont(ctx, sii8620_got_ecbus_speed);
+ break;
+ case CM_ECBUS_S:
+ sii8620_mt_read_devcap(ctx, true);
+ break;
+ default:
+ break;
+ }
+ }
+ if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_FEAT_REQ)
+ sii8620_send_features(ctx);
+ if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_FEAT_COMPLETE) {
+ ctx->feature_complete = true;
+ if (ctx->edid)
+ sii8620_enable_hpd(ctx);
+ }
+}
+
+static struct sii8620_mt_msg *sii8620_msc_msg_first(struct sii8620 *ctx)
+{
+ struct device *dev = ctx->dev;
+
+ if (list_empty(&ctx->mt_queue)) {
+ dev_err(dev, "unexpected MSC MT response\n");
+ return NULL;
+ }
+
+ return list_first_entry(&ctx->mt_queue, struct sii8620_mt_msg, node);
+}
+
+static void sii8620_msc_mt_done(struct sii8620 *ctx)
+{
+ struct sii8620_mt_msg *msg = sii8620_msc_msg_first(ctx);
+
+ if (!msg)
+ return;
+
+ msg->ret = sii8620_readb(ctx, REG_MSC_MT_RCVD_DATA0);
+ ctx->mt_state = MT_STATE_DONE;
+}
+
+static void sii8620_msc_mr_msc_msg(struct sii8620 *ctx)
+{
+ struct sii8620_mt_msg *msg;
+ u8 buf[2];
+
+ sii8620_read_buf(ctx, REG_MSC_MR_MSC_MSG_RCVD_1ST_DATA, buf, 2);
+
+ switch (buf[0]) {
+ case MHL_MSC_MSG_RAPK:
+ msg = sii8620_msc_msg_first(ctx);
+ if (!msg)
+ return;
+ msg->ret = buf[1];
+ ctx->mt_state = MT_STATE_DONE;
+ break;
+ case MHL_MSC_MSG_RCP:
+ if (!sii8620_rcp_consume(ctx, buf[1]))
+ sii8620_mt_rcpe(ctx,
+ MHL_RCPE_STATUS_INEFFECTIVE_KEY_CODE);
+ sii8620_mt_rcpk(ctx, buf[1]);
+ break;
+ default:
+ dev_err(ctx->dev, "%s message type %d,%d not supported",
+ __func__, buf[0], buf[1]);
+ }
+}
+
+static void sii8620_irq_msc(struct sii8620 *ctx)
+{
+ u8 stat = sii8620_readb(ctx, REG_CBUS_INT_0);
+
+ if (stat & ~BIT_CBUS_HPD_CHG)
+ sii8620_write(ctx, REG_CBUS_INT_0, stat & ~BIT_CBUS_HPD_CHG);
+
+ if (stat & BIT_CBUS_HPD_CHG) {
+ u8 cbus_stat = sii8620_readb(ctx, REG_CBUS_STATUS);
+
+ if ((cbus_stat ^ ctx->cbus_status) & BIT_CBUS_STATUS_CBUS_HPD) {
+ sii8620_write(ctx, REG_CBUS_INT_0, BIT_CBUS_HPD_CHG);
+ } else {
+ stat ^= BIT_CBUS_STATUS_CBUS_HPD;
+ cbus_stat ^= BIT_CBUS_STATUS_CBUS_HPD;
+ }
+ ctx->cbus_status = cbus_stat;
+ }
+
+ if (stat & BIT_CBUS_MSC_MR_WRITE_STAT)
+ sii8620_msc_mr_write_stat(ctx);
+
+ if (stat & BIT_CBUS_HPD_CHG) {
+ if (ctx->cbus_status & BIT_CBUS_STATUS_CBUS_HPD) {
+ ctx->sink_detected = true;
+ sii8620_identify_sink(ctx);
+ } else {
+ sii8620_hpd_unplugged(ctx);
+ }
+ }
+
+ if (stat & BIT_CBUS_MSC_MR_SET_INT)
+ sii8620_msc_mr_set_int(ctx);
+
+ if (stat & BIT_CBUS_MSC_MT_DONE)
+ sii8620_msc_mt_done(ctx);
+
+ if (stat & BIT_CBUS_MSC_MR_MSC_MSG)
+ sii8620_msc_mr_msc_msg(ctx);
+}
+
+static void sii8620_irq_coc(struct sii8620 *ctx)
+{
+ u8 stat = sii8620_readb(ctx, REG_COC_INTR);
+
+ if (stat & BIT_COC_CALIBRATION_DONE) {
+ u8 cstat = sii8620_readb(ctx, REG_COC_STAT_0);
+
+ cstat &= BIT_COC_STAT_0_PLL_LOCKED | MSK_COC_STAT_0_FSM_STATE;
+ if (cstat == (BIT_COC_STAT_0_PLL_LOCKED | 0x02)) {
+ sii8620_write_seq_static(ctx,
+ REG_COC_CTLB, 0,
+ REG_TRXINTMH, BIT_TDM_INTR_SYNC_DATA
+ | BIT_TDM_INTR_SYNC_WAIT
+ );
+ }
+ }
+
+ sii8620_write(ctx, REG_COC_INTR, stat);
+}
+
+static void sii8620_irq_merr(struct sii8620 *ctx)
+{
+ u8 stat = sii8620_readb(ctx, REG_CBUS_INT_1);
+
+ sii8620_write(ctx, REG_CBUS_INT_1, stat);
+}
+
+static void sii8620_irq_edid(struct sii8620 *ctx)
+{
+ u8 stat = sii8620_readb(ctx, REG_INTR9);
+
+ sii8620_write(ctx, REG_INTR9, stat);
+
+ if (stat & BIT_INTR9_DEVCAP_DONE)
+ ctx->mt_state = MT_STATE_DONE;
+}
+
+static void sii8620_irq_scdt(struct sii8620 *ctx)
+{
+ u8 stat = sii8620_readb(ctx, REG_INTR5);
+
+ if (stat & BIT_INTR_SCDT_CHANGE) {
+ u8 cstat = sii8620_readb(ctx, REG_TMDS_CSTAT_P3);
+
+ if (cstat & BIT_TMDS_CSTAT_P3_SCDT)
+ sii8620_start_video(ctx);
+ }
+
+ sii8620_write(ctx, REG_INTR5, stat);
+}
+
+static void sii8620_got_xdevcap(struct sii8620 *ctx, int ret)
+{
+ if (ret < 0)
+ return;
+
+ sii8620_mt_read_devcap(ctx, false);
+}
+
+static void sii8620_irq_tdm(struct sii8620 *ctx)
+{
+ u8 stat = sii8620_readb(ctx, REG_TRXINTH);
+ u8 tdm = sii8620_readb(ctx, REG_TRXSTA2);
+
+ if ((tdm & MSK_TDM_SYNCHRONIZED) == VAL_TDM_SYNCHRONIZED) {
+ ctx->mode = CM_ECBUS_S;
+ ctx->burst.rx_ack = 0;
+ ctx->burst.r_size = SII8620_BURST_BUF_LEN;
+ sii8620_burst_tx_rbuf_info(ctx, SII8620_BURST_BUF_LEN);
+ sii8620_mt_read_devcap(ctx, true);
+ sii8620_mt_set_cont(ctx, sii8620_got_xdevcap);
+ } else {
+ sii8620_write_seq_static(ctx,
+ REG_MHL_PLL_CTL2, 0,
+ REG_MHL_PLL_CTL2, BIT_MHL_PLL_CTL2_CLKDETECT_EN
+ );
+ }
+
+ sii8620_write(ctx, REG_TRXINTH, stat);
+}
+
+static void sii8620_irq_block(struct sii8620 *ctx)
+{
+ u8 stat = sii8620_readb(ctx, REG_EMSCINTR);
+
+ if (stat & BIT_EMSCINTR_SPI_DVLD) {
+ u8 bstat = sii8620_readb(ctx, REG_SPIBURSTSTAT);
+
+ if (bstat & BIT_SPIBURSTSTAT_EMSC_NORMAL_MODE)
+ sii8620_burst_receive(ctx);
+ }
+
+ sii8620_write(ctx, REG_EMSCINTR, stat);
+}
+
+static void sii8620_irq_ddc(struct sii8620 *ctx)
+{
+ u8 stat = sii8620_readb(ctx, REG_INTR3);
+
+ if (stat & BIT_DDC_CMD_DONE) {
+ sii8620_write(ctx, REG_INTR3_MASK, 0);
+ if (sii8620_is_mhl3(ctx) && !ctx->feature_complete)
+ sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE),
+ MHL_INT_RC_FEAT_REQ);
+ else
+ sii8620_enable_hpd(ctx);
+ }
+ sii8620_write(ctx, REG_INTR3, stat);
+}
+
+/* endian agnostic, non-volatile version of test_bit */
+static bool sii8620_test_bit(unsigned int nr, const u8 *addr)
+{
+ return 1 & (addr[nr / BITS_PER_BYTE] >> (nr % BITS_PER_BYTE));
+}
+
+static irqreturn_t sii8620_irq_thread(int irq, void *data)
+{
+ static const struct {
+ int bit;
+ void (*handler)(struct sii8620 *ctx);
+ } irq_vec[] = {
+ { BIT_FAST_INTR_STAT_DISC, sii8620_irq_disc },
+ { BIT_FAST_INTR_STAT_G2WB, sii8620_irq_g2wb },
+ { BIT_FAST_INTR_STAT_COC, sii8620_irq_coc },
+ { BIT_FAST_INTR_STAT_TDM, sii8620_irq_tdm },
+ { BIT_FAST_INTR_STAT_MSC, sii8620_irq_msc },
+ { BIT_FAST_INTR_STAT_MERR, sii8620_irq_merr },
+ { BIT_FAST_INTR_STAT_BLOCK, sii8620_irq_block },
+ { BIT_FAST_INTR_STAT_EDID, sii8620_irq_edid },
+ { BIT_FAST_INTR_STAT_DDC, sii8620_irq_ddc },
+ { BIT_FAST_INTR_STAT_SCDT, sii8620_irq_scdt },
+ };
+ struct sii8620 *ctx = data;
+ u8 stats[LEN_FAST_INTR_STAT];
+ int i, ret;
+
+ mutex_lock(&ctx->lock);
+
+ sii8620_read_buf(ctx, REG_FAST_INTR_STAT, stats, ARRAY_SIZE(stats));
+ for (i = 0; i < ARRAY_SIZE(irq_vec); ++i)
+ if (sii8620_test_bit(irq_vec[i].bit, stats))
+ irq_vec[i].handler(ctx);
+
+ sii8620_burst_rx_all(ctx);
+ sii8620_mt_work(ctx);
+ sii8620_burst_send(ctx);
+
+ ret = sii8620_clear_error(ctx);
+ if (ret) {
+ dev_err(ctx->dev, "Error during IRQ handling, %d.\n", ret);
+ sii8620_mhl_disconnected(ctx);
+ }
+ mutex_unlock(&ctx->lock);
+
+ return IRQ_HANDLED;
+}
+
+static void sii8620_cable_in(struct sii8620 *ctx)
+{
+ struct device *dev = ctx->dev;
+ u8 ver[5];
+ int ret;
+
+ ret = sii8620_hw_on(ctx);
+ if (ret) {
+ dev_err(dev, "Error powering on, %d.\n", ret);
+ return;
+ }
+
+ sii8620_read_buf(ctx, REG_VND_IDL, ver, ARRAY_SIZE(ver));
+ ret = sii8620_clear_error(ctx);
+ if (ret) {
+ dev_err(dev, "Error accessing I2C bus, %d.\n", ret);
+ return;
+ }
+
+ dev_info(dev, "ChipID %02x%02x:%02x%02x rev %02x.\n", ver[1], ver[0],
+ ver[3], ver[2], ver[4]);
+
+ sii8620_write(ctx, REG_DPD,
+ BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12 | BIT_DPD_OSC_EN);
+
+ sii8620_xtal_set_rate(ctx);
+ sii8620_disconnect(ctx);
+
+ sii8620_write_seq_static(ctx,
+ REG_MHL_CBUS_CTL0, VAL_MHL_CBUS_CTL0_CBUS_DRV_SEL_STRONG
+ | VAL_MHL_CBUS_CTL0_CBUS_RGND_VBIAS_734,
+ REG_MHL_CBUS_CTL1, VAL_MHL_CBUS_CTL1_1115_OHM,
+ REG_DPD, BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12 | BIT_DPD_OSC_EN,
+ );
+
+ ret = sii8620_clear_error(ctx);
+ if (ret) {
+ dev_err(dev, "Error accessing I2C bus, %d.\n", ret);
+ return;
+ }
+
+ enable_irq(to_i2c_client(ctx->dev)->irq);
+}
+
+static void sii8620_init_rcp_input_dev(struct sii8620 *ctx)
+{
+ struct rc_dev *rc_dev;
+ int ret;
+
+ if (!IS_ENABLED(CONFIG_RC_CORE))
+ return;
+
+ rc_dev = rc_allocate_device(RC_DRIVER_SCANCODE);
+ if (!rc_dev) {
+ dev_err(ctx->dev, "Failed to allocate RC device\n");
+ ctx->error = -ENOMEM;
+ return;
+ }
+
+ rc_dev->input_phys = "sii8620/input0";
+ rc_dev->input_id.bustype = BUS_VIRTUAL;
+ rc_dev->map_name = RC_MAP_CEC;
+ rc_dev->allowed_protocols = RC_PROTO_BIT_CEC;
+ rc_dev->driver_name = "sii8620";
+ rc_dev->device_name = "sii8620";
+
+ ret = rc_register_device(rc_dev);
+
+ if (ret) {
+ dev_err(ctx->dev, "Failed to register RC device\n");
+ ctx->error = ret;
+ rc_free_device(rc_dev);
+ return;
+ }
+ ctx->rc_dev = rc_dev;
+}
+
+static void sii8620_cable_out(struct sii8620 *ctx)
+{
+ disable_irq(to_i2c_client(ctx->dev)->irq);
+ sii8620_hw_off(ctx);
+}
+
+static void sii8620_extcon_work(struct work_struct *work)
+{
+ struct sii8620 *ctx =
+ container_of(work, struct sii8620, extcon_wq);
+ int state = extcon_get_state(ctx->extcon, EXTCON_DISP_MHL);
+
+ if (state == ctx->cable_state)
+ return;
+
+ ctx->cable_state = state;
+
+ if (state > 0)
+ sii8620_cable_in(ctx);
+ else
+ sii8620_cable_out(ctx);
+}
+
+static int sii8620_extcon_notifier(struct notifier_block *self,
+ unsigned long event, void *ptr)
+{
+ struct sii8620 *ctx =
+ container_of(self, struct sii8620, extcon_nb);
+
+ schedule_work(&ctx->extcon_wq);
+
+ return NOTIFY_DONE;
+}
+
+static int sii8620_extcon_init(struct sii8620 *ctx)
+{
+ struct extcon_dev *edev;
+ struct device_node *musb, *muic;
+ int ret;
+
+ /* get micro-USB connector node */
+ musb = of_graph_get_remote_node(ctx->dev->of_node, 1, -1);
+ /* next get micro-USB Interface Controller node */
+ muic = of_get_next_parent(musb);
+
+ if (!muic) {
+ dev_info(ctx->dev, "no extcon found, switching to 'always on' mode\n");
+ return 0;
+ }
+
+ edev = extcon_find_edev_by_node(muic);
+ of_node_put(muic);
+ if (IS_ERR(edev)) {
+ if (PTR_ERR(edev) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_err(ctx->dev, "Invalid or missing extcon\n");
+ return PTR_ERR(edev);
+ }
+
+ ctx->extcon = edev;
+ ctx->extcon_nb.notifier_call = sii8620_extcon_notifier;
+ INIT_WORK(&ctx->extcon_wq, sii8620_extcon_work);
+ ret = extcon_register_notifier(edev, EXTCON_DISP_MHL, &ctx->extcon_nb);
+ if (ret) {
+ dev_err(ctx->dev, "failed to register notifier for MHL\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static inline struct sii8620 *bridge_to_sii8620(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct sii8620, bridge);
+}
+
+static int sii8620_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct sii8620 *ctx = bridge_to_sii8620(bridge);
+
+ sii8620_init_rcp_input_dev(ctx);
+
+ return sii8620_clear_error(ctx);
+}
+
+static void sii8620_detach(struct drm_bridge *bridge)
+{
+ struct sii8620 *ctx = bridge_to_sii8620(bridge);
+
+ if (!IS_ENABLED(CONFIG_RC_CORE))
+ return;
+
+ rc_unregister_device(ctx->rc_dev);
+}
+
+static int sii8620_is_packing_required(struct sii8620 *ctx,
+ const struct drm_display_mode *mode)
+{
+ int max_pclk, max_pclk_pp_mode;
+
+ if (sii8620_is_mhl3(ctx)) {
+ max_pclk = MHL3_MAX_PCLK;
+ max_pclk_pp_mode = MHL3_MAX_PCLK_PP_MODE;
+ } else {
+ max_pclk = MHL1_MAX_PCLK;
+ max_pclk_pp_mode = MHL1_MAX_PCLK_PP_MODE;
+ }
+
+ if (mode->clock < max_pclk)
+ return 0;
+ else if (mode->clock < max_pclk_pp_mode)
+ return 1;
+ else
+ return -1;
+}
+
+static enum drm_mode_status sii8620_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct sii8620 *ctx = bridge_to_sii8620(bridge);
+ int pack_required = sii8620_is_packing_required(ctx, mode);
+ bool can_pack = ctx->devcap[MHL_DCAP_VID_LINK_MODE] &
+ MHL_DCAP_VID_LINK_PPIXEL;
+
+ switch (pack_required) {
+ case 0:
+ return MODE_OK;
+ case 1:
+ return (can_pack) ? MODE_OK : MODE_CLOCK_HIGH;
+ default:
+ return MODE_CLOCK_HIGH;
+ }
+}
+
+static bool sii8620_mode_fixup(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ struct sii8620 *ctx = bridge_to_sii8620(bridge);
+
+ mutex_lock(&ctx->lock);
+
+ ctx->use_packed_pixel = sii8620_is_packing_required(ctx, adjusted_mode);
+
+ mutex_unlock(&ctx->lock);
+
+ return true;
+}
+
+static const struct drm_bridge_funcs sii8620_bridge_funcs = {
+ .attach = sii8620_attach,
+ .detach = sii8620_detach,
+ .mode_fixup = sii8620_mode_fixup,
+ .mode_valid = sii8620_mode_valid,
+};
+
+static int sii8620_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct sii8620 *ctx;
+ int ret;
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->dev = dev;
+ mutex_init(&ctx->lock);
+ INIT_LIST_HEAD(&ctx->mt_queue);
+
+ ctx->clk_xtal = devm_clk_get(dev, "xtal");
+ if (IS_ERR(ctx->clk_xtal))
+ return dev_err_probe(dev, PTR_ERR(ctx->clk_xtal),
+ "failed to get xtal clock from DT\n");
+
+ if (!client->irq) {
+ dev_err(dev, "no irq provided\n");
+ return -EINVAL;
+ }
+ irq_set_status_flags(client->irq, IRQ_NOAUTOEN);
+ ret = devm_request_threaded_irq(dev, client->irq, NULL,
+ sii8620_irq_thread,
+ IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+ "sii8620", ctx);
+ if (ret < 0)
+ return dev_err_probe(dev, ret,
+ "failed to install IRQ handler\n");
+
+ ctx->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(ctx->gpio_reset))
+ return dev_err_probe(dev, PTR_ERR(ctx->gpio_reset),
+ "failed to get reset gpio from DT\n");
+
+ ctx->supplies[0].supply = "cvcc10";
+ ctx->supplies[1].supply = "iovcc18";
+ ret = devm_regulator_bulk_get(dev, 2, ctx->supplies);
+ if (ret)
+ return ret;
+
+ ret = sii8620_extcon_init(ctx);
+ if (ret < 0) {
+ dev_err(ctx->dev, "failed to initialize EXTCON\n");
+ return ret;
+ }
+
+ i2c_set_clientdata(client, ctx);
+
+ ctx->bridge.funcs = &sii8620_bridge_funcs;
+ ctx->bridge.of_node = dev->of_node;
+ drm_bridge_add(&ctx->bridge);
+
+ if (!ctx->extcon)
+ sii8620_cable_in(ctx);
+
+ return 0;
+}
+
+static void sii8620_remove(struct i2c_client *client)
+{
+ struct sii8620 *ctx = i2c_get_clientdata(client);
+
+ if (ctx->extcon) {
+ extcon_unregister_notifier(ctx->extcon, EXTCON_DISP_MHL,
+ &ctx->extcon_nb);
+ flush_work(&ctx->extcon_wq);
+ if (ctx->cable_state > 0)
+ sii8620_cable_out(ctx);
+ } else {
+ sii8620_cable_out(ctx);
+ }
+ drm_bridge_remove(&ctx->bridge);
+}
+
+static const struct of_device_id sii8620_dt_match[] = {
+ { .compatible = "sil,sii8620" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, sii8620_dt_match);
+
+static const struct i2c_device_id sii8620_id[] = {
+ { "sii8620", 0 },
+ { },
+};
+
+MODULE_DEVICE_TABLE(i2c, sii8620_id);
+static struct i2c_driver sii8620_driver = {
+ .driver = {
+ .name = "sii8620",
+ .of_match_table = of_match_ptr(sii8620_dt_match),
+ },
+ .probe = sii8620_probe,
+ .remove = sii8620_remove,
+ .id_table = sii8620_id,
+};
+
+module_i2c_driver(sii8620_driver);
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/sil-sii8620.h b/drivers/gpu/drm/bridge/sil-sii8620.h
new file mode 100644
index 000000000..79d61caf3
--- /dev/null
+++ b/drivers/gpu/drm/bridge/sil-sii8620.h
@@ -0,0 +1,1532 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Registers of Silicon Image SiI8620 Mobile HD Transmitter
+ *
+ * Copyright (C) 2015, Samsung Electronics Co., Ltd.
+ * Andrzej Hajda <a.hajda@samsung.com>
+ *
+ * Based on MHL driver for Android devices.
+ * Copyright (C) 2013-2014 Silicon Image, Inc.
+ */
+
+#ifndef __SIL_SII8620_H__
+#define __SIL_SII8620_H__
+
+/* Vendor ID Low byte, default value: 0x01 */
+#define REG_VND_IDL 0x0000
+
+/* Vendor ID High byte, default value: 0x00 */
+#define REG_VND_IDH 0x0001
+
+/* Device ID Low byte, default value: 0x60 */
+#define REG_DEV_IDL 0x0002
+
+/* Device ID High byte, default value: 0x86 */
+#define REG_DEV_IDH 0x0003
+
+/* Device Revision, default value: 0x10 */
+#define REG_DEV_REV 0x0004
+
+/* OTP DBYTE510, default value: 0x00 */
+#define REG_OTP_DBYTE510 0x0006
+
+/* System Control #1, default value: 0x00 */
+#define REG_SYS_CTRL1 0x0008
+#define BIT_SYS_CTRL1_OTPVMUTEOVR_SET BIT(7)
+#define BIT_SYS_CTRL1_VSYNCPIN BIT(6)
+#define BIT_SYS_CTRL1_OTPADROPOVR_SET BIT(5)
+#define BIT_SYS_CTRL1_BLOCK_DDC_BY_HPD BIT(4)
+#define BIT_SYS_CTRL1_OTP2XVOVR_EN BIT(3)
+#define BIT_SYS_CTRL1_OTP2XAOVR_EN BIT(2)
+#define BIT_SYS_CTRL1_TX_CTRL_HDMI BIT(1)
+#define BIT_SYS_CTRL1_OTPAMUTEOVR_SET BIT(0)
+
+/* System Control DPD, default value: 0x90 */
+#define REG_DPD 0x000b
+#define BIT_DPD_PWRON_PLL BIT(7)
+#define BIT_DPD_PDNTX12 BIT(6)
+#define BIT_DPD_PDNRX12 BIT(5)
+#define BIT_DPD_OSC_EN BIT(4)
+#define BIT_DPD_PWRON_HSIC BIT(3)
+#define BIT_DPD_PDIDCK_N BIT(2)
+#define BIT_DPD_PD_MHL_CLK_N BIT(1)
+
+/* Dual link Control, default value: 0x00 */
+#define REG_DCTL 0x000d
+#define BIT_DCTL_TDM_LCLK_PHASE BIT(7)
+#define BIT_DCTL_HSIC_CLK_PHASE BIT(6)
+#define BIT_DCTL_CTS_TCK_PHASE BIT(5)
+#define BIT_DCTL_EXT_DDC_SEL BIT(4)
+#define BIT_DCTL_TRANSCODE BIT(3)
+#define BIT_DCTL_HSIC_RX_STROBE_PHASE BIT(2)
+#define BIT_DCTL_HSIC_TX_BIST_START_SEL BIT(1)
+#define BIT_DCTL_TCLKNX_PHASE BIT(0)
+
+/* PWD Software Reset, default value: 0x20 */
+#define REG_PWD_SRST 0x000e
+#define BIT_PWD_SRST_COC_DOC_RST BIT(7)
+#define BIT_PWD_SRST_CBUS_RST_SW BIT(6)
+#define BIT_PWD_SRST_CBUS_RST_SW_EN BIT(5)
+#define BIT_PWD_SRST_MHLFIFO_RST BIT(4)
+#define BIT_PWD_SRST_CBUS_RST BIT(3)
+#define BIT_PWD_SRST_SW_RST_AUTO BIT(2)
+#define BIT_PWD_SRST_HDCP2X_SW_RST BIT(1)
+#define BIT_PWD_SRST_SW_RST BIT(0)
+
+/* AKSV_1, default value: 0x00 */
+#define REG_AKSV_1 0x001d
+
+/* Video H Resolution #1, default value: 0x00 */
+#define REG_H_RESL 0x003a
+
+/* Video Mode, default value: 0x00 */
+#define REG_VID_MODE 0x004a
+#define BIT_VID_MODE_M1080P BIT(6)
+
+/* Video Input Mode, default value: 0xc0 */
+#define REG_VID_OVRRD 0x0051
+#define BIT_VID_OVRRD_PP_AUTO_DISABLE BIT(7)
+#define BIT_VID_OVRRD_M1080P_OVRRD BIT(6)
+#define BIT_VID_OVRRD_MINIVSYNC_ON BIT(5)
+#define BIT_VID_OVRRD_3DCONV_EN_FRAME_PACK BIT(4)
+#define BIT_VID_OVRRD_ENABLE_AUTO_PATH_EN BIT(3)
+#define BIT_VID_OVRRD_ENRGB2YCBCR_OVRRD BIT(2)
+#define BIT_VID_OVRRD_ENDOWNSAMPLE_OVRRD BIT(0)
+
+/* I2C Address reassignment, default value: 0x00 */
+#define REG_PAGE_MHLSPEC_ADDR 0x0057
+#define REG_PAGE7_ADDR 0x0058
+#define REG_PAGE8_ADDR 0x005c
+
+/* Fast Interrupt Status, default value: 0x00 */
+#define REG_FAST_INTR_STAT 0x005f
+#define LEN_FAST_INTR_STAT 7
+#define BIT_FAST_INTR_STAT_TIMR 8
+#define BIT_FAST_INTR_STAT_INT2 9
+#define BIT_FAST_INTR_STAT_DDC 10
+#define BIT_FAST_INTR_STAT_SCDT 11
+#define BIT_FAST_INTR_STAT_INFR 13
+#define BIT_FAST_INTR_STAT_EDID 14
+#define BIT_FAST_INTR_STAT_HDCP 15
+#define BIT_FAST_INTR_STAT_MSC 16
+#define BIT_FAST_INTR_STAT_MERR 17
+#define BIT_FAST_INTR_STAT_G2WB 18
+#define BIT_FAST_INTR_STAT_G2WB_ERR 19
+#define BIT_FAST_INTR_STAT_DISC 28
+#define BIT_FAST_INTR_STAT_BLOCK 30
+#define BIT_FAST_INTR_STAT_LTRN 31
+#define BIT_FAST_INTR_STAT_HDCP2 32
+#define BIT_FAST_INTR_STAT_TDM 42
+#define BIT_FAST_INTR_STAT_COC 51
+
+/* GPIO Control, default value: 0x15 */
+#define REG_GPIO_CTRL1 0x006e
+#define BIT_CTRL1_GPIO_I_8 BIT(5)
+#define BIT_CTRL1_GPIO_OEN_8 BIT(4)
+#define BIT_CTRL1_GPIO_I_7 BIT(3)
+#define BIT_CTRL1_GPIO_OEN_7 BIT(2)
+#define BIT_CTRL1_GPIO_I_6 BIT(1)
+#define BIT_CTRL1_GPIO_OEN_6 BIT(0)
+
+/* Interrupt Control, default value: 0x06 */
+#define REG_INT_CTRL 0x006f
+#define BIT_INT_CTRL_SOFTWARE_WP BIT(7)
+#define BIT_INT_CTRL_INTR_OD BIT(2)
+#define BIT_INT_CTRL_INTR_POLARITY BIT(1)
+
+/* Interrupt State, default value: 0x00 */
+#define REG_INTR_STATE 0x0070
+#define BIT_INTR_STATE_INTR_STATE BIT(0)
+
+/* Interrupt Source #1, default value: 0x00 */
+#define REG_INTR1 0x0071
+
+/* Interrupt Source #2, default value: 0x00 */
+#define REG_INTR2 0x0072
+
+/* Interrupt Source #3, default value: 0x01 */
+#define REG_INTR3 0x0073
+#define BIT_DDC_CMD_DONE BIT(3)
+
+/* Interrupt Source #5, default value: 0x00 */
+#define REG_INTR5 0x0074
+
+/* Interrupt #1 Mask, default value: 0x00 */
+#define REG_INTR1_MASK 0x0075
+
+/* Interrupt #2 Mask, default value: 0x00 */
+#define REG_INTR2_MASK 0x0076
+
+/* Interrupt #3 Mask, default value: 0x00 */
+#define REG_INTR3_MASK 0x0077
+
+/* Interrupt #5 Mask, default value: 0x00 */
+#define REG_INTR5_MASK 0x0078
+#define BIT_INTR_SCDT_CHANGE BIT(0)
+
+/* Hot Plug Connection Control, default value: 0x45 */
+#define REG_HPD_CTRL 0x0079
+#define BIT_HPD_CTRL_HPD_DS_SIGNAL BIT(7)
+#define BIT_HPD_CTRL_HPD_OUT_OD_EN BIT(6)
+#define BIT_HPD_CTRL_HPD_HIGH BIT(5)
+#define BIT_HPD_CTRL_HPD_OUT_OVR_EN BIT(4)
+#define BIT_HPD_CTRL_GPIO_I_1 BIT(3)
+#define BIT_HPD_CTRL_GPIO_OEN_1 BIT(2)
+#define BIT_HPD_CTRL_GPIO_I_0 BIT(1)
+#define BIT_HPD_CTRL_GPIO_OEN_0 BIT(0)
+
+/* GPIO Control, default value: 0x55 */
+#define REG_GPIO_CTRL 0x007a
+#define BIT_CTRL_GPIO_I_5 BIT(7)
+#define BIT_CTRL_GPIO_OEN_5 BIT(6)
+#define BIT_CTRL_GPIO_I_4 BIT(5)
+#define BIT_CTRL_GPIO_OEN_4 BIT(4)
+#define BIT_CTRL_GPIO_I_3 BIT(3)
+#define BIT_CTRL_GPIO_OEN_3 BIT(2)
+#define BIT_CTRL_GPIO_I_2 BIT(1)
+#define BIT_CTRL_GPIO_OEN_2 BIT(0)
+
+/* Interrupt Source 7, default value: 0x00 */
+#define REG_INTR7 0x007b
+
+/* Interrupt Source 8, default value: 0x00 */
+#define REG_INTR8 0x007c
+
+/* Interrupt #7 Mask, default value: 0x00 */
+#define REG_INTR7_MASK 0x007d
+
+/* Interrupt #8 Mask, default value: 0x00 */
+#define REG_INTR8_MASK 0x007e
+#define BIT_CEA_NEW_VSI BIT(2)
+#define BIT_CEA_NEW_AVI BIT(1)
+
+/* IEEE, default value: 0x10 */
+#define REG_TMDS_CCTRL 0x0080
+#define BIT_TMDS_CCTRL_TMDS_OE BIT(4)
+
+/* TMDS Control #4, default value: 0x02 */
+#define REG_TMDS_CTRL4 0x0085
+#define BIT_TMDS_CTRL4_SCDT_CKDT_SEL BIT(1)
+#define BIT_TMDS_CTRL4_TX_EN_BY_SCDT BIT(0)
+
+/* BIST CNTL, default value: 0x00 */
+#define REG_BIST_CTRL 0x00bb
+#define BIT_RXBIST_VGB_EN BIT(7)
+#define BIT_TXBIST_VGB_EN BIT(6)
+#define BIT_BIST_START_SEL BIT(5)
+#define BIT_BIST_START_BIT BIT(4)
+#define BIT_BIST_ALWAYS_ON BIT(3)
+#define BIT_BIST_TRANS BIT(2)
+#define BIT_BIST_RESET BIT(1)
+#define BIT_BIST_EN BIT(0)
+
+/* BIST DURATION0, default value: 0x00 */
+#define REG_BIST_TEST_SEL 0x00bd
+#define MSK_BIST_TEST_SEL_BIST_PATT_SEL 0x0f
+
+/* BIST VIDEO_MODE, default value: 0x00 */
+#define REG_BIST_VIDEO_MODE 0x00be
+#define MSK_BIST_VIDEO_MODE_BIST_VIDEO_MODE_3_0 0x0f
+
+/* BIST DURATION0, default value: 0x00 */
+#define REG_BIST_DURATION_0 0x00bf
+
+/* BIST DURATION1, default value: 0x00 */
+#define REG_BIST_DURATION_1 0x00c0
+
+/* BIST DURATION2, default value: 0x00 */
+#define REG_BIST_DURATION_2 0x00c1
+
+/* BIST 8BIT_PATTERN, default value: 0x00 */
+#define REG_BIST_8BIT_PATTERN 0x00c2
+
+/* LM DDC, default value: 0x80 */
+#define REG_LM_DDC 0x00c7
+#define BIT_LM_DDC_SW_TPI_EN_DISABLED BIT(7)
+
+#define BIT_LM_DDC_VIDEO_MUTE_EN BIT(5)
+#define BIT_LM_DDC_DDC_TPI_SW BIT(2)
+#define BIT_LM_DDC_DDC_GRANT BIT(1)
+#define BIT_LM_DDC_DDC_GPU_REQUEST BIT(0)
+
+/* DDC I2C Manual, default value: 0x03 */
+#define REG_DDC_MANUAL 0x00ec
+#define BIT_DDC_MANUAL_MAN_DDC BIT(7)
+#define BIT_DDC_MANUAL_VP_SEL BIT(6)
+#define BIT_DDC_MANUAL_DSDA BIT(5)
+#define BIT_DDC_MANUAL_DSCL BIT(4)
+#define BIT_DDC_MANUAL_GCP_HW_CTL_EN BIT(3)
+#define BIT_DDC_MANUAL_DDCM_ABORT_WP BIT(2)
+#define BIT_DDC_MANUAL_IO_DSDA BIT(1)
+#define BIT_DDC_MANUAL_IO_DSCL BIT(0)
+
+/* DDC I2C Target Slave Address, default value: 0x00 */
+#define REG_DDC_ADDR 0x00ed
+#define MSK_DDC_ADDR_DDC_ADDR 0xfe
+
+/* DDC I2C Target Segment Address, default value: 0x00 */
+#define REG_DDC_SEGM 0x00ee
+
+/* DDC I2C Target Offset Address, default value: 0x00 */
+#define REG_DDC_OFFSET 0x00ef
+
+/* DDC I2C Data In count #1, default value: 0x00 */
+#define REG_DDC_DIN_CNT1 0x00f0
+
+/* DDC I2C Data In count #2, default value: 0x00 */
+#define REG_DDC_DIN_CNT2 0x00f1
+#define MSK_DDC_DIN_CNT2_DDC_DIN_CNT_9_8 0x03
+
+/* DDC I2C Status, default value: 0x04 */
+#define REG_DDC_STATUS 0x00f2
+#define BIT_DDC_STATUS_DDC_BUS_LOW BIT(6)
+#define BIT_DDC_STATUS_DDC_NO_ACK BIT(5)
+#define BIT_DDC_STATUS_DDC_I2C_IN_PROG BIT(4)
+#define BIT_DDC_STATUS_DDC_FIFO_FULL BIT(3)
+#define BIT_DDC_STATUS_DDC_FIFO_EMPTY BIT(2)
+#define BIT_DDC_STATUS_DDC_FIFO_READ_IN_SUE BIT(1)
+#define BIT_DDC_STATUS_DDC_FIFO_WRITE_IN_USE BIT(0)
+
+/* DDC I2C Command, default value: 0x70 */
+#define REG_DDC_CMD 0x00f3
+#define BIT_DDC_CMD_HDCP_DDC_EN BIT(6)
+#define BIT_DDC_CMD_SDA_DEL_EN BIT(5)
+#define BIT_DDC_CMD_DDC_FLT_EN BIT(4)
+
+#define MSK_DDC_CMD_DDC_CMD 0x0f
+#define VAL_DDC_CMD_ENH_DDC_READ_NO_ACK 0x04
+#define VAL_DDC_CMD_DDC_CMD_CLEAR_FIFO 0x09
+#define VAL_DDC_CMD_DDC_CMD_ABORT 0x0f
+
+/* DDC I2C FIFO Data In/Out, default value: 0x00 */
+#define REG_DDC_DATA 0x00f4
+
+/* DDC I2C Data Out Counter, default value: 0x00 */
+#define REG_DDC_DOUT_CNT 0x00f5
+#define BIT_DDC_DOUT_CNT_DDC_DELAY_CNT_8 BIT(7)
+#define MSK_DDC_DOUT_CNT_DDC_DATA_OUT_CNT 0x1f
+
+/* DDC I2C Delay Count, default value: 0x14 */
+#define REG_DDC_DELAY_CNT 0x00f6
+
+/* Test Control, default value: 0x80 */
+#define REG_TEST_TXCTRL 0x00f7
+#define BIT_TEST_TXCTRL_RCLK_REF_SEL BIT(7)
+#define BIT_TEST_TXCTRL_PCLK_REF_SEL BIT(6)
+#define MSK_TEST_TXCTRL_BYPASS_PLL_CLK 0x3c
+#define BIT_TEST_TXCTRL_HDMI_MODE BIT(1)
+#define BIT_TEST_TXCTRL_TST_PLLCK BIT(0)
+
+/* CBUS Address, default value: 0x00 */
+#define REG_PAGE_CBUS_ADDR 0x00f8
+
+/* I2C Device Address re-assignment */
+#define REG_PAGE1_ADDR 0x00fc
+#define REG_PAGE2_ADDR 0x00fd
+#define REG_PAGE3_ADDR 0x00fe
+#define REG_HW_TPI_ADDR 0x00ff
+
+/* USBT CTRL0, default value: 0x00 */
+#define REG_UTSRST 0x0100
+#define BIT_UTSRST_FC_SRST BIT(5)
+#define BIT_UTSRST_KEEPER_SRST BIT(4)
+#define BIT_UTSRST_HTX_SRST BIT(3)
+#define BIT_UTSRST_TRX_SRST BIT(2)
+#define BIT_UTSRST_TTX_SRST BIT(1)
+#define BIT_UTSRST_HRX_SRST BIT(0)
+
+/* HSIC RX Control3, default value: 0x07 */
+#define REG_HRXCTRL3 0x0104
+#define MSK_HRXCTRL3_HRX_AFFCTRL 0xf0
+#define BIT_HRXCTRL3_HRX_OUT_EN BIT(2)
+#define BIT_HRXCTRL3_STATUS_EN BIT(1)
+#define BIT_HRXCTRL3_HRX_STAY_RESET BIT(0)
+
+/* HSIC RX INT Registers */
+#define REG_HRXINTL 0x0111
+#define REG_HRXINTH 0x0112
+
+/* TDM TX NUMBITS, default value: 0x0c */
+#define REG_TTXNUMB 0x0116
+#define MSK_TTXNUMB_TTX_AFFCTRL_3_0 0xf0
+#define BIT_TTXNUMB_TTX_COM1_AT_SYNC_WAIT BIT(3)
+#define MSK_TTXNUMB_TTX_NUMBPS 0x07
+
+/* TDM TX NUMSPISYM, default value: 0x04 */
+#define REG_TTXSPINUMS 0x0117
+
+/* TDM TX NUMHSICSYM, default value: 0x14 */
+#define REG_TTXHSICNUMS 0x0118
+
+/* TDM TX NUMTOTSYM, default value: 0x18 */
+#define REG_TTXTOTNUMS 0x0119
+
+/* TDM TX INT Low, default value: 0x00 */
+#define REG_TTXINTL 0x0136
+#define BIT_TTXINTL_TTX_INTR7 BIT(7)
+#define BIT_TTXINTL_TTX_INTR6 BIT(6)
+#define BIT_TTXINTL_TTX_INTR5 BIT(5)
+#define BIT_TTXINTL_TTX_INTR4 BIT(4)
+#define BIT_TTXINTL_TTX_INTR3 BIT(3)
+#define BIT_TTXINTL_TTX_INTR2 BIT(2)
+#define BIT_TTXINTL_TTX_INTR1 BIT(1)
+#define BIT_TTXINTL_TTX_INTR0 BIT(0)
+
+/* TDM TX INT High, default value: 0x00 */
+#define REG_TTXINTH 0x0137
+#define BIT_TTXINTH_TTX_INTR15 BIT(7)
+#define BIT_TTXINTH_TTX_INTR14 BIT(6)
+#define BIT_TTXINTH_TTX_INTR13 BIT(5)
+#define BIT_TTXINTH_TTX_INTR12 BIT(4)
+#define BIT_TTXINTH_TTX_INTR11 BIT(3)
+#define BIT_TTXINTH_TTX_INTR10 BIT(2)
+#define BIT_TTXINTH_TTX_INTR9 BIT(1)
+#define BIT_TTXINTH_TTX_INTR8 BIT(0)
+
+/* TDM RX Control, default value: 0x1c */
+#define REG_TRXCTRL 0x013b
+#define BIT_TRXCTRL_TRX_CLR_WVALLOW BIT(4)
+#define BIT_TRXCTRL_TRX_FROM_SE_COC BIT(3)
+#define MSK_TRXCTRL_TRX_NUMBPS_2_0 0x07
+
+/* TDM RX NUMSPISYM, default value: 0x04 */
+#define REG_TRXSPINUMS 0x013c
+
+/* TDM RX NUMHSICSYM, default value: 0x14 */
+#define REG_TRXHSICNUMS 0x013d
+
+/* TDM RX NUMTOTSYM, default value: 0x18 */
+#define REG_TRXTOTNUMS 0x013e
+
+/* TDM RX Status 2nd, default value: 0x00 */
+#define REG_TRXSTA2 0x015c
+#define MSK_TDM_SYNCHRONIZED 0xc0
+#define VAL_TDM_SYNCHRONIZED 0x80
+
+/* TDM RX INT Low, default value: 0x00 */
+#define REG_TRXINTL 0x0163
+
+/* TDM RX INT High, default value: 0x00 */
+#define REG_TRXINTH 0x0164
+#define BIT_TDM_INTR_SYNC_DATA BIT(0)
+#define BIT_TDM_INTR_SYNC_WAIT BIT(1)
+
+/* TDM RX INTMASK High, default value: 0x00 */
+#define REG_TRXINTMH 0x0166
+
+/* HSIC TX CRTL, default value: 0x00 */
+#define REG_HTXCTRL 0x0169
+#define BIT_HTXCTRL_HTX_ALLSBE_SOP BIT(4)
+#define BIT_HTXCTRL_HTX_RGDINV_USB BIT(3)
+#define BIT_HTXCTRL_HTX_RSPTDM_BUSY BIT(2)
+#define BIT_HTXCTRL_HTX_DRVCONN1 BIT(1)
+#define BIT_HTXCTRL_HTX_DRVRST1 BIT(0)
+
+/* HSIC TX INT Low, default value: 0x00 */
+#define REG_HTXINTL 0x017d
+
+/* HSIC TX INT High, default value: 0x00 */
+#define REG_HTXINTH 0x017e
+
+/* HSIC Keeper, default value: 0x00 */
+#define REG_KEEPER 0x0181
+#define MSK_KEEPER_MODE 0x03
+#define VAL_KEEPER_MODE_HOST 0
+#define VAL_KEEPER_MODE_DEVICE 2
+
+/* HSIC Flow Control General, default value: 0x02 */
+#define REG_FCGC 0x0183
+#define BIT_FCGC_HSIC_HOSTMODE BIT(1)
+#define BIT_FCGC_HSIC_ENABLE BIT(0)
+
+/* HSIC Flow Control CTR13, default value: 0xfc */
+#define REG_FCCTR13 0x0191
+
+/* HSIC Flow Control CTR14, default value: 0xff */
+#define REG_FCCTR14 0x0192
+
+/* HSIC Flow Control CTR15, default value: 0xff */
+#define REG_FCCTR15 0x0193
+
+/* HSIC Flow Control CTR50, default value: 0x03 */
+#define REG_FCCTR50 0x01b6
+
+/* HSIC Flow Control INTR0, default value: 0x00 */
+#define REG_FCINTR0 0x01ec
+#define REG_FCINTR1 0x01ed
+#define REG_FCINTR2 0x01ee
+#define REG_FCINTR3 0x01ef
+#define REG_FCINTR4 0x01f0
+#define REG_FCINTR5 0x01f1
+#define REG_FCINTR6 0x01f2
+#define REG_FCINTR7 0x01f3
+
+/* TDM Low Latency, default value: 0x20 */
+#define REG_TDMLLCTL 0x01fc
+#define MSK_TDMLLCTL_TRX_LL_SEL_MANUAL 0xc0
+#define MSK_TDMLLCTL_TRX_LL_SEL_MODE 0x30
+#define MSK_TDMLLCTL_TTX_LL_SEL_MANUAL 0x0c
+#define BIT_TDMLLCTL_TTX_LL_TIE_LOW BIT(1)
+#define BIT_TDMLLCTL_TTX_LL_SEL_MODE BIT(0)
+
+/* TMDS 0 Clock Control, default value: 0x10 */
+#define REG_TMDS0_CCTRL1 0x0210
+#define MSK_TMDS0_CCTRL1_TEST_SEL 0xc0
+#define MSK_TMDS0_CCTRL1_CLK1X_CTL 0x30
+
+/* TMDS Clock Enable, default value: 0x00 */
+#define REG_TMDS_CLK_EN 0x0211
+#define BIT_TMDS_CLK_EN_CLK_EN BIT(0)
+
+/* TMDS Channel Enable, default value: 0x00 */
+#define REG_TMDS_CH_EN 0x0212
+#define BIT_TMDS_CH_EN_CH0_EN BIT(4)
+#define BIT_TMDS_CH_EN_CH12_EN BIT(0)
+
+/* BGR_BIAS, default value: 0x07 */
+#define REG_BGR_BIAS 0x0215
+#define BIT_BGR_BIAS_BGR_EN BIT(7)
+#define MSK_BGR_BIAS_BIAS_BGR_D 0x0f
+
+/* TMDS 0 Digital I2C BW, default value: 0x0a */
+#define REG_ALICE0_BW_I2C 0x0231
+
+/* TMDS 0 Digital Zone Control, default value: 0xe0 */
+#define REG_ALICE0_ZONE_CTRL 0x024c
+#define BIT_ALICE0_ZONE_CTRL_ICRST_N BIT(7)
+#define BIT_ALICE0_ZONE_CTRL_USE_INT_DIV20 BIT(6)
+#define MSK_ALICE0_ZONE_CTRL_SZONE_I2C 0x30
+#define MSK_ALICE0_ZONE_CTRL_ZONE_CTRL 0x0f
+
+/* TMDS 0 Digital PLL Mode Control, default value: 0x00 */
+#define REG_ALICE0_MODE_CTRL 0x024d
+#define MSK_ALICE0_MODE_CTRL_PLL_MODE_I2C 0x0c
+#define MSK_ALICE0_MODE_CTRL_DIV20_CTRL 0x03
+
+/* MHL Tx Control 6th, default value: 0xa0 */
+#define REG_MHLTX_CTL6 0x0285
+#define MSK_MHLTX_CTL6_EMI_SEL 0xe0
+#define MSK_MHLTX_CTL6_TX_CLK_SHAPE_9_8 0x03
+
+/* Packet Filter0, default value: 0x00 */
+#define REG_PKT_FILTER_0 0x0290
+#define BIT_PKT_FILTER_0_DROP_CEA_GAMUT_PKT BIT(7)
+#define BIT_PKT_FILTER_0_DROP_CEA_CP_PKT BIT(6)
+#define BIT_PKT_FILTER_0_DROP_MPEG_PKT BIT(5)
+#define BIT_PKT_FILTER_0_DROP_SPIF_PKT BIT(4)
+#define BIT_PKT_FILTER_0_DROP_AIF_PKT BIT(3)
+#define BIT_PKT_FILTER_0_DROP_AVI_PKT BIT(2)
+#define BIT_PKT_FILTER_0_DROP_CTS_PKT BIT(1)
+#define BIT_PKT_FILTER_0_DROP_GCP_PKT BIT(0)
+
+/* Packet Filter1, default value: 0x00 */
+#define REG_PKT_FILTER_1 0x0291
+#define BIT_PKT_FILTER_1_VSI_OVERRIDE_DIS BIT(7)
+#define BIT_PKT_FILTER_1_AVI_OVERRIDE_DIS BIT(6)
+#define BIT_PKT_FILTER_1_DROP_AUDIO_PKT BIT(3)
+#define BIT_PKT_FILTER_1_DROP_GEN2_PKT BIT(2)
+#define BIT_PKT_FILTER_1_DROP_GEN_PKT BIT(1)
+#define BIT_PKT_FILTER_1_DROP_VSIF_PKT BIT(0)
+
+/* TMDS Clock Status, default value: 0x10 */
+#define REG_TMDS_CSTAT_P3 0x02a0
+#define BIT_TMDS_CSTAT_P3_RX_HDMI_CP_CLR_MUTE BIT(7)
+#define BIT_TMDS_CSTAT_P3_RX_HDMI_CP_SET_MUTE BIT(6)
+#define BIT_TMDS_CSTAT_P3_RX_HDMI_CP_NEW_CP BIT(5)
+#define BIT_TMDS_CSTAT_P3_CLR_AVI BIT(3)
+#define BIT_TMDS_CSTAT_P3_SCDT_CLR_AVI_DIS BIT(2)
+#define BIT_TMDS_CSTAT_P3_SCDT BIT(1)
+#define BIT_TMDS_CSTAT_P3_CKDT BIT(0)
+
+/* RX_HDMI Control, default value: 0x10 */
+#define REG_RX_HDMI_CTRL0 0x02a1
+#define BIT_RX_HDMI_CTRL0_BYP_DVIFILT_SYNC BIT(5)
+#define BIT_RX_HDMI_CTRL0_HDMI_MODE_EN_ITSELF_CLR BIT(4)
+#define BIT_RX_HDMI_CTRL0_HDMI_MODE_SW_VALUE BIT(3)
+#define BIT_RX_HDMI_CTRL0_HDMI_MODE_OVERWRITE BIT(2)
+#define BIT_RX_HDMI_CTRL0_RX_HDMI_HDMI_MODE_EN BIT(1)
+#define BIT_RX_HDMI_CTRL0_RX_HDMI_HDMI_MODE BIT(0)
+
+/* RX_HDMI Control, default value: 0x38 */
+#define REG_RX_HDMI_CTRL2 0x02a3
+#define MSK_RX_HDMI_CTRL2_IDLE_CNT 0xf0
+#define VAL_RX_HDMI_CTRL2_IDLE_CNT(n) ((n) << 4)
+#define BIT_RX_HDMI_CTRL2_USE_AV_MUTE BIT(3)
+#define BIT_RX_HDMI_CTRL2_VSI_MON_SEL_VSI BIT(0)
+
+/* RX_HDMI Control, default value: 0x0f */
+#define REG_RX_HDMI_CTRL3 0x02a4
+#define MSK_RX_HDMI_CTRL3_PP_MODE_CLK_EN 0x0f
+
+/* rx_hdmi Clear Buffer, default value: 0x00 */
+#define REG_RX_HDMI_CLR_BUFFER 0x02ac
+#define MSK_RX_HDMI_CLR_BUFFER_AIF4VSI_CMP 0xc0
+#define BIT_RX_HDMI_CLR_BUFFER_USE_AIF4VSI BIT(5)
+#define BIT_RX_HDMI_CLR_BUFFER_VSI_CLR_W_AVI BIT(4)
+#define BIT_RX_HDMI_CLR_BUFFER_VSI_IEEE_ID_CHK_EN BIT(3)
+#define BIT_RX_HDMI_CLR_BUFFER_SWAP_VSI_IEEE_ID BIT(2)
+#define BIT_RX_HDMI_CLR_BUFFER_AIF_CLR_EN BIT(1)
+#define BIT_RX_HDMI_CLR_BUFFER_VSI_CLR_EN BIT(0)
+
+/* RX_HDMI VSI Header1, default value: 0x00 */
+#define REG_RX_HDMI_MON_PKT_HEADER1 0x02b8
+
+/* RX_HDMI VSI MHL Monitor, default value: 0x3c */
+#define REG_RX_HDMI_VSIF_MHL_MON 0x02d7
+
+#define MSK_RX_HDMI_VSIF_MHL_MON_RX_HDMI_MHL_3D_FORMAT 0x3c
+#define MSK_RX_HDMI_VSIF_MHL_MON_RX_HDMI_MHL_VID_FORMAT 0x03
+
+/* Interrupt Source 9, default value: 0x00 */
+#define REG_INTR9 0x02e0
+#define BIT_INTR9_EDID_ERROR BIT(6)
+#define BIT_INTR9_EDID_DONE BIT(5)
+#define BIT_INTR9_DEVCAP_DONE BIT(4)
+
+/* Interrupt 9 Mask, default value: 0x00 */
+#define REG_INTR9_MASK 0x02e1
+
+/* TPI CBUS Start, default value: 0x00 */
+#define REG_TPI_CBUS_START 0x02e2
+#define BIT_TPI_CBUS_START_RCP_REQ_START BIT(7)
+#define BIT_TPI_CBUS_START_RCPK_REPLY_START BIT(6)
+#define BIT_TPI_CBUS_START_RCPE_REPLY_START BIT(5)
+#define BIT_TPI_CBUS_START_PUT_LINK_MODE_START BIT(4)
+#define BIT_TPI_CBUS_START_PUT_DCAPCHG_START BIT(3)
+#define BIT_TPI_CBUS_START_PUT_DCAPRDY_START BIT(2)
+#define BIT_TPI_CBUS_START_GET_EDID_START_0 BIT(1)
+#define BIT_TPI_CBUS_START_GET_DEVCAP_START BIT(0)
+
+/* EDID Control, default value: 0x10 */
+#define REG_EDID_CTRL 0x02e3
+#define BIT_EDID_CTRL_EDID_PRIME_VALID BIT(7)
+#define BIT_EDID_CTRL_XDEVCAP_EN BIT(6)
+#define BIT_EDID_CTRL_DEVCAP_SELECT_DEVCAP BIT(5)
+#define BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO BIT(4)
+#define BIT_EDID_CTRL_EDID_FIFO_ACCESS_ALWAYS_EN BIT(3)
+#define BIT_EDID_CTRL_EDID_FIFO_BLOCK_SEL BIT(2)
+#define BIT_EDID_CTRL_INVALID_BKSV BIT(1)
+#define BIT_EDID_CTRL_EDID_MODE_EN BIT(0)
+
+/* EDID FIFO Addr, default value: 0x00 */
+#define REG_EDID_FIFO_ADDR 0x02e9
+
+/* EDID FIFO Write Data, default value: 0x00 */
+#define REG_EDID_FIFO_WR_DATA 0x02ea
+
+/* EDID/DEVCAP FIFO Internal Addr, default value: 0x00 */
+#define REG_EDID_FIFO_ADDR_MON 0x02eb
+
+/* EDID FIFO Read Data, default value: 0x00 */
+#define REG_EDID_FIFO_RD_DATA 0x02ec
+
+/* EDID DDC Segment Pointer, default value: 0x00 */
+#define REG_EDID_START_EXT 0x02ed
+
+/* TX IP BIST CNTL and Status, default value: 0x00 */
+#define REG_TX_IP_BIST_CNTLSTA 0x02f2
+#define BIT_TX_IP_BIST_CNTLSTA_TXBIST_QUARTER_CLK_SEL BIT(6)
+#define BIT_TX_IP_BIST_CNTLSTA_TXBIST_DONE BIT(5)
+#define BIT_TX_IP_BIST_CNTLSTA_TXBIST_ON BIT(4)
+#define BIT_TX_IP_BIST_CNTLSTA_TXBIST_RUN BIT(3)
+#define BIT_TX_IP_BIST_CNTLSTA_TXCLK_HALF_SEL BIT(2)
+#define BIT_TX_IP_BIST_CNTLSTA_TXBIST_EN BIT(1)
+#define BIT_TX_IP_BIST_CNTLSTA_TXBIST_SEL BIT(0)
+
+/* TX IP BIST INST LOW, default value: 0x00 */
+#define REG_TX_IP_BIST_INST_LOW 0x02f3
+#define REG_TX_IP_BIST_INST_HIGH 0x02f4
+
+/* TX IP BIST PATTERN LOW, default value: 0x00 */
+#define REG_TX_IP_BIST_PAT_LOW 0x02f5
+#define REG_TX_IP_BIST_PAT_HIGH 0x02f6
+
+/* TX IP BIST CONFIGURE LOW, default value: 0x00 */
+#define REG_TX_IP_BIST_CONF_LOW 0x02f7
+#define REG_TX_IP_BIST_CONF_HIGH 0x02f8
+
+/* E-MSC General Control, default value: 0x80 */
+#define REG_GENCTL 0x0300
+#define BIT_GENCTL_SPEC_TRANS_DIS BIT(7)
+#define BIT_GENCTL_DIS_XMIT_ERR_STATE BIT(6)
+#define BIT_GENCTL_SPI_MISO_EDGE BIT(5)
+#define BIT_GENCTL_SPI_MOSI_EDGE BIT(4)
+#define BIT_GENCTL_CLR_EMSC_RFIFO BIT(3)
+#define BIT_GENCTL_CLR_EMSC_XFIFO BIT(2)
+#define BIT_GENCTL_START_TRAIN_SEQ BIT(1)
+#define BIT_GENCTL_EMSC_EN BIT(0)
+
+/* E-MSC Comma ErrorCNT, default value: 0x03 */
+#define REG_COMMECNT 0x0305
+#define BIT_COMMECNT_I2C_TO_EMSC_EN BIT(7)
+#define MSK_COMMECNT_COMMA_CHAR_ERR_CNT 0x0f
+
+/* E-MSC RFIFO ByteCnt, default value: 0x00 */
+#define REG_EMSCRFIFOBCNTL 0x031a
+#define REG_EMSCRFIFOBCNTH 0x031b
+
+/* SPI Burst Cnt Status, default value: 0x00 */
+#define REG_SPIBURSTCNT 0x031e
+
+/* SPI Burst Status and SWRST, default value: 0x00 */
+#define REG_SPIBURSTSTAT 0x0322
+#define BIT_SPIBURSTSTAT_SPI_HDCPRST BIT(7)
+#define BIT_SPIBURSTSTAT_SPI_CBUSRST BIT(6)
+#define BIT_SPIBURSTSTAT_SPI_SRST BIT(5)
+#define BIT_SPIBURSTSTAT_EMSC_NORMAL_MODE BIT(0)
+
+/* E-MSC 1st Interrupt, default value: 0x00 */
+#define REG_EMSCINTR 0x0323
+#define BIT_EMSCINTR_EMSC_XFIFO_EMPTY BIT(7)
+#define BIT_EMSCINTR_EMSC_XMIT_ACK_TOUT BIT(6)
+#define BIT_EMSCINTR_EMSC_RFIFO_READ_ERR BIT(5)
+#define BIT_EMSCINTR_EMSC_XFIFO_WRITE_ERR BIT(4)
+#define BIT_EMSCINTR_EMSC_COMMA_CHAR_ERR BIT(3)
+#define BIT_EMSCINTR_EMSC_XMIT_DONE BIT(2)
+#define BIT_EMSCINTR_EMSC_XMIT_GNT_TOUT BIT(1)
+#define BIT_EMSCINTR_SPI_DVLD BIT(0)
+
+/* E-MSC Interrupt Mask, default value: 0x00 */
+#define REG_EMSCINTRMASK 0x0324
+
+/* I2C E-MSC XMIT FIFO Write Port, default value: 0x00 */
+#define REG_EMSC_XMIT_WRITE_PORT 0x032a
+
+/* I2C E-MSC RCV FIFO Write Port, default value: 0x00 */
+#define REG_EMSC_RCV_READ_PORT 0x032b
+
+/* E-MSC 2nd Interrupt, default value: 0x00 */
+#define REG_EMSCINTR1 0x032c
+#define BIT_EMSCINTR1_EMSC_TRAINING_COMMA_ERR BIT(0)
+
+/* E-MSC Interrupt Mask, default value: 0x00 */
+#define REG_EMSCINTRMASK1 0x032d
+#define BIT_EMSCINTRMASK1_EMSC_INTRMASK1_0 BIT(0)
+
+/* MHL Top Ctl, default value: 0x00 */
+#define REG_MHL_TOP_CTL 0x0330
+#define BIT_MHL_TOP_CTL_MHL3_DOC_SEL BIT(7)
+#define BIT_MHL_TOP_CTL_MHL_PP_SEL BIT(6)
+#define MSK_MHL_TOP_CTL_IF_TIMING_CTL 0x03
+
+/* MHL DataPath 1st Ctl, default value: 0xbc */
+#define REG_MHL_DP_CTL0 0x0331
+#define BIT_MHL_DP_CTL0_DP_OE BIT(7)
+#define BIT_MHL_DP_CTL0_TX_OE_OVR BIT(6)
+#define MSK_MHL_DP_CTL0_TX_OE 0x3f
+
+/* MHL DataPath 2nd Ctl, default value: 0xbb */
+#define REG_MHL_DP_CTL1 0x0332
+#define MSK_MHL_DP_CTL1_CK_SWING_CTL 0xf0
+#define MSK_MHL_DP_CTL1_DT_SWING_CTL 0x0f
+
+/* MHL DataPath 3rd Ctl, default value: 0x2f */
+#define REG_MHL_DP_CTL2 0x0333
+#define BIT_MHL_DP_CTL2_CLK_BYPASS_EN BIT(7)
+#define MSK_MHL_DP_CTL2_DAMP_TERM_SEL 0x30
+#define MSK_MHL_DP_CTL2_CK_TERM_SEL 0x0c
+#define MSK_MHL_DP_CTL2_DT_TERM_SEL 0x03
+
+/* MHL DataPath 4th Ctl, default value: 0x48 */
+#define REG_MHL_DP_CTL3 0x0334
+#define MSK_MHL_DP_CTL3_DT_DRV_VNBC_CTL 0xf0
+#define MSK_MHL_DP_CTL3_DT_DRV_VNB_CTL 0x0f
+
+/* MHL DataPath 5th Ctl, default value: 0x48 */
+#define REG_MHL_DP_CTL4 0x0335
+#define MSK_MHL_DP_CTL4_CK_DRV_VNBC_CTL 0xf0
+#define MSK_MHL_DP_CTL4_CK_DRV_VNB_CTL 0x0f
+
+/* MHL DataPath 6th Ctl, default value: 0x3f */
+#define REG_MHL_DP_CTL5 0x0336
+#define BIT_MHL_DP_CTL5_RSEN_EN_OVR BIT(7)
+#define BIT_MHL_DP_CTL5_RSEN_EN BIT(6)
+#define MSK_MHL_DP_CTL5_DAMP_TERM_VGS_CTL 0x30
+#define MSK_MHL_DP_CTL5_CK_TERM_VGS_CTL 0x0c
+#define MSK_MHL_DP_CTL5_DT_TERM_VGS_CTL 0x03
+
+/* MHL PLL 1st Ctl, default value: 0x05 */
+#define REG_MHL_PLL_CTL0 0x0337
+#define BIT_MHL_PLL_CTL0_AUD_CLK_EN BIT(7)
+
+#define MSK_MHL_PLL_CTL0_AUD_CLK_RATIO 0x70
+#define VAL_MHL_PLL_CTL0_AUD_CLK_RATIO_5_10 0x70
+#define VAL_MHL_PLL_CTL0_AUD_CLK_RATIO_5_6 0x60
+#define VAL_MHL_PLL_CTL0_AUD_CLK_RATIO_5_4 0x50
+#define VAL_MHL_PLL_CTL0_AUD_CLK_RATIO_5_2 0x40
+#define VAL_MHL_PLL_CTL0_AUD_CLK_RATIO_5_5 0x30
+#define VAL_MHL_PLL_CTL0_AUD_CLK_RATIO_5_3 0x20
+#define VAL_MHL_PLL_CTL0_AUD_CLK_RATIO_5_2_PRIME 0x10
+#define VAL_MHL_PLL_CTL0_AUD_CLK_RATIO_5_1 0x00
+
+#define MSK_MHL_PLL_CTL0_HDMI_CLK_RATIO 0x0c
+#define VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_4X 0x0c
+#define VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_2X 0x08
+#define VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X 0x04
+#define VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_HALF_X 0x00
+
+#define BIT_MHL_PLL_CTL0_CRYSTAL_CLK_SEL BIT(1)
+#define BIT_MHL_PLL_CTL0_ZONE_MASK_OE BIT(0)
+
+/* MHL PLL 3rd Ctl, default value: 0x80 */
+#define REG_MHL_PLL_CTL2 0x0339
+#define BIT_MHL_PLL_CTL2_CLKDETECT_EN BIT(7)
+#define BIT_MHL_PLL_CTL2_MEAS_FVCO BIT(3)
+#define BIT_MHL_PLL_CTL2_PLL_FAST_LOCK BIT(2)
+#define MSK_MHL_PLL_CTL2_PLL_LF_SEL 0x03
+
+/* MHL CBUS 1st Ctl, default value: 0x12 */
+#define REG_MHL_CBUS_CTL0 0x0340
+#define BIT_MHL_CBUS_CTL0_CBUS_RGND_TEST_MODE BIT(7)
+
+#define MSK_MHL_CBUS_CTL0_CBUS_RGND_VTH_CTL 0x30
+#define VAL_MHL_CBUS_CTL0_CBUS_RGND_VBIAS_734 0x00
+#define VAL_MHL_CBUS_CTL0_CBUS_RGND_VBIAS_747 0x10
+#define VAL_MHL_CBUS_CTL0_CBUS_RGND_VBIAS_740 0x20
+#define VAL_MHL_CBUS_CTL0_CBUS_RGND_VBIAS_754 0x30
+
+#define MSK_MHL_CBUS_CTL0_CBUS_RES_TEST_SEL 0x0c
+
+#define MSK_MHL_CBUS_CTL0_CBUS_DRV_SEL 0x03
+#define VAL_MHL_CBUS_CTL0_CBUS_DRV_SEL_WEAKEST 0x00
+#define VAL_MHL_CBUS_CTL0_CBUS_DRV_SEL_WEAK 0x01
+#define VAL_MHL_CBUS_CTL0_CBUS_DRV_SEL_STRONG 0x02
+#define VAL_MHL_CBUS_CTL0_CBUS_DRV_SEL_STRONGEST 0x03
+
+/* MHL CBUS 2nd Ctl, default value: 0x03 */
+#define REG_MHL_CBUS_CTL1 0x0341
+#define MSK_MHL_CBUS_CTL1_CBUS_RGND_RES_CTL 0x07
+#define VAL_MHL_CBUS_CTL1_0888_OHM 0x00
+#define VAL_MHL_CBUS_CTL1_1115_OHM 0x04
+#define VAL_MHL_CBUS_CTL1_1378_OHM 0x07
+
+/* MHL CoC 1st Ctl, default value: 0xc3 */
+#define REG_MHL_COC_CTL0 0x0342
+#define BIT_MHL_COC_CTL0_COC_BIAS_EN BIT(7)
+#define MSK_MHL_COC_CTL0_COC_BIAS_CTL 0x70
+#define MSK_MHL_COC_CTL0_COC_TERM_CTL 0x07
+
+/* MHL CoC 2nd Ctl, default value: 0x87 */
+#define REG_MHL_COC_CTL1 0x0343
+#define BIT_MHL_COC_CTL1_COC_EN BIT(7)
+#define MSK_MHL_COC_CTL1_COC_DRV_CTL 0x3f
+
+/* MHL CoC 4th Ctl, default value: 0x00 */
+#define REG_MHL_COC_CTL3 0x0345
+#define BIT_MHL_COC_CTL3_COC_AECHO_EN BIT(0)
+
+/* MHL CoC 5th Ctl, default value: 0x28 */
+#define REG_MHL_COC_CTL4 0x0346
+#define MSK_MHL_COC_CTL4_COC_IF_CTL 0xf0
+#define MSK_MHL_COC_CTL4_COC_SLEW_CTL 0x0f
+
+/* MHL CoC 6th Ctl, default value: 0x0d */
+#define REG_MHL_COC_CTL5 0x0347
+
+/* MHL DoC 1st Ctl, default value: 0x18 */
+#define REG_MHL_DOC_CTL0 0x0349
+#define BIT_MHL_DOC_CTL0_DOC_RXDATA_EN BIT(7)
+#define MSK_MHL_DOC_CTL0_DOC_DM_TERM 0x38
+#define MSK_MHL_DOC_CTL0_DOC_OPMODE 0x06
+#define BIT_MHL_DOC_CTL0_DOC_RXBIAS_EN BIT(0)
+
+/* MHL DataPath 7th Ctl, default value: 0x2a */
+#define REG_MHL_DP_CTL6 0x0350
+#define BIT_MHL_DP_CTL6_DP_TAP2_SGN BIT(5)
+#define BIT_MHL_DP_CTL6_DP_TAP2_EN BIT(4)
+#define BIT_MHL_DP_CTL6_DP_TAP1_SGN BIT(3)
+#define BIT_MHL_DP_CTL6_DP_TAP1_EN BIT(2)
+#define BIT_MHL_DP_CTL6_DT_PREDRV_FEEDCAP_EN BIT(1)
+#define BIT_MHL_DP_CTL6_DP_PRE_POST_SEL BIT(0)
+
+/* MHL DataPath 8th Ctl, default value: 0x06 */
+#define REG_MHL_DP_CTL7 0x0351
+#define MSK_MHL_DP_CTL7_DT_DRV_VBIAS_CASCTL 0xf0
+#define MSK_MHL_DP_CTL7_DT_DRV_IREF_CTL 0x0f
+
+#define REG_MHL_DP_CTL8 0x0352
+
+/* Tx Zone Ctl1, default value: 0x00 */
+#define REG_TX_ZONE_CTL1 0x0361
+#define VAL_TX_ZONE_CTL1_TX_ZONE_CTRL_MODE 0x08
+
+/* MHL3 Tx Zone Ctl, default value: 0x00 */
+#define REG_MHL3_TX_ZONE_CTL 0x0364
+#define BIT_MHL3_TX_ZONE_CTL_MHL2_INTPLT_ZONE_MANU_EN BIT(7)
+#define MSK_MHL3_TX_ZONE_CTL_MHL3_TX_ZONE 0x03
+
+#define MSK_TX_ZONE_CTL3_TX_ZONE 0x03
+#define VAL_TX_ZONE_CTL3_TX_ZONE_6GBPS 0x00
+#define VAL_TX_ZONE_CTL3_TX_ZONE_3GBPS 0x01
+#define VAL_TX_ZONE_CTL3_TX_ZONE_1_5GBPS 0x02
+
+/* HDCP Polling Control and Status, default value: 0x70 */
+#define REG_HDCP2X_POLL_CS 0x0391
+
+#define BIT_HDCP2X_POLL_CS_HDCP2X_MSG_SZ_CLR_OPTION BIT(6)
+#define BIT_HDCP2X_POLL_CS_HDCP2X_RPT_READY_CLR_OPTION BIT(5)
+#define BIT_HDCP2X_POLL_CS_HDCP2X_REAUTH_REQ_CLR_OPTION BIT(4)
+#define MSK_HDCP2X_POLL_CS_ 0x0c
+#define BIT_HDCP2X_POLL_CS_HDCP2X_DIS_POLL_GNT BIT(1)
+#define BIT_HDCP2X_POLL_CS_HDCP2X_DIS_POLL_EN BIT(0)
+
+/* HDCP Interrupt 0, default value: 0x00 */
+#define REG_HDCP2X_INTR0 0x0398
+
+/* HDCP Interrupt 0 Mask, default value: 0x00 */
+#define REG_HDCP2X_INTR0_MASK 0x0399
+
+/* HDCP General Control 0, default value: 0x02 */
+#define REG_HDCP2X_CTRL_0 0x03a0
+#define BIT_HDCP2X_CTRL_0_HDCP2X_ENCRYPT_EN BIT(7)
+#define BIT_HDCP2X_CTRL_0_HDCP2X_POLINT_SEL BIT(6)
+#define BIT_HDCP2X_CTRL_0_HDCP2X_POLINT_OVR BIT(5)
+#define BIT_HDCP2X_CTRL_0_HDCP2X_PRECOMPUTE BIT(4)
+#define BIT_HDCP2X_CTRL_0_HDCP2X_HDMIMODE BIT(3)
+#define BIT_HDCP2X_CTRL_0_HDCP2X_REPEATER BIT(2)
+#define BIT_HDCP2X_CTRL_0_HDCP2X_HDCPTX BIT(1)
+#define BIT_HDCP2X_CTRL_0_HDCP2X_EN BIT(0)
+
+/* HDCP General Control 1, default value: 0x08 */
+#define REG_HDCP2X_CTRL_1 0x03a1
+#define MSK_HDCP2X_CTRL_1_HDCP2X_REAUTH_MSK_3_0 0xf0
+#define BIT_HDCP2X_CTRL_1_HDCP2X_HPD_SW BIT(3)
+#define BIT_HDCP2X_CTRL_1_HDCP2X_HPD_OVR BIT(2)
+#define BIT_HDCP2X_CTRL_1_HDCP2X_CTL3MSK BIT(1)
+#define BIT_HDCP2X_CTRL_1_HDCP2X_REAUTH_SW BIT(0)
+
+/* HDCP Misc Control, default value: 0x00 */
+#define REG_HDCP2X_MISC_CTRL 0x03a5
+#define BIT_HDCP2X_MISC_CTRL_HDCP2X_RPT_SMNG_XFER_START BIT(4)
+#define BIT_HDCP2X_MISC_CTRL_HDCP2X_RPT_SMNG_WR_START BIT(3)
+#define BIT_HDCP2X_MISC_CTRL_HDCP2X_RPT_SMNG_WR BIT(2)
+#define BIT_HDCP2X_MISC_CTRL_HDCP2X_RPT_RCVID_RD_START BIT(1)
+#define BIT_HDCP2X_MISC_CTRL_HDCP2X_RPT_RCVID_RD BIT(0)
+
+/* HDCP RPT SMNG K, default value: 0x00 */
+#define REG_HDCP2X_RPT_SMNG_K 0x03a6
+
+/* HDCP RPT SMNG In, default value: 0x00 */
+#define REG_HDCP2X_RPT_SMNG_IN 0x03a7
+
+/* HDCP Auth Status, default value: 0x00 */
+#define REG_HDCP2X_AUTH_STAT 0x03aa
+
+/* HDCP RPT RCVID Out, default value: 0x00 */
+#define REG_HDCP2X_RPT_RCVID_OUT 0x03ac
+
+/* HDCP TP1, default value: 0x62 */
+#define REG_HDCP2X_TP1 0x03b4
+
+/* HDCP GP Out 0, default value: 0x00 */
+#define REG_HDCP2X_GP_OUT0 0x03c7
+
+/* HDCP Repeater RCVR ID 0, default value: 0x00 */
+#define REG_HDCP2X_RPT_RCVR_ID0 0x03d1
+
+/* HDCP DDCM Status, default value: 0x00 */
+#define REG_HDCP2X_DDCM_STS 0x03d8
+#define MSK_HDCP2X_DDCM_STS_HDCP2X_DDCM_ERR_STS_3_0 0xf0
+#define MSK_HDCP2X_DDCM_STS_HDCP2X_DDCM_CTL_CS_3_0 0x0f
+
+/* HDMI2MHL3 Control, default value: 0x0a */
+#define REG_M3_CTRL 0x03e0
+#define BIT_M3_CTRL_H2M_SWRST BIT(4)
+#define BIT_M3_CTRL_SW_MHL3_SEL BIT(3)
+#define BIT_M3_CTRL_M3AV_EN BIT(2)
+#define BIT_M3_CTRL_ENC_TMDS BIT(1)
+#define BIT_M3_CTRL_MHL3_MASTER_EN BIT(0)
+
+#define VAL_M3_CTRL_MHL1_2_VALUE (BIT_M3_CTRL_SW_MHL3_SEL \
+ | BIT_M3_CTRL_ENC_TMDS)
+#define VAL_M3_CTRL_MHL3_VALUE (BIT_M3_CTRL_SW_MHL3_SEL \
+ | BIT_M3_CTRL_M3AV_EN \
+ | BIT_M3_CTRL_ENC_TMDS \
+ | BIT_M3_CTRL_MHL3_MASTER_EN)
+
+/* HDMI2MHL3 Port0 Control, default value: 0x04 */
+#define REG_M3_P0CTRL 0x03e1
+#define BIT_M3_P0CTRL_MHL3_P0_HDCP_ENC_EN BIT(4)
+#define BIT_M3_P0CTRL_MHL3_P0_UNLIMIT_EN BIT(3)
+#define BIT_M3_P0CTRL_MHL3_P0_HDCP_EN BIT(2)
+#define BIT_M3_P0CTRL_MHL3_P0_PIXEL_MODE_PACKED BIT(1)
+#define BIT_M3_P0CTRL_MHL3_P0_PORT_EN BIT(0)
+
+#define REG_M3_POSTM 0x03e2
+#define MSK_M3_POSTM_RRP_DECODE 0xf8
+#define MSK_M3_POSTM_MHL3_P0_STM_ID 0x07
+
+/* HDMI2MHL3 Scramble Control, default value: 0x41 */
+#define REG_M3_SCTRL 0x03e6
+#define MSK_M3_SCTRL_MHL3_SR_LENGTH 0xf0
+#define BIT_M3_SCTRL_MHL3_SCRAMBLER_EN BIT(0)
+
+/* HSIC Div Ctl, default value: 0x05 */
+#define REG_DIV_CTL_MAIN 0x03f2
+#define MSK_DIV_CTL_MAIN_PRE_DIV_CTL_MAIN 0x1c
+#define MSK_DIV_CTL_MAIN_FB_DIV_CTL_MAIN 0x03
+
+/* MHL Capability 1st Byte, default value: 0x00 */
+#define REG_MHL_DEVCAP_0 0x0400
+
+/* MHL Interrupt 1st Byte, default value: 0x00 */
+#define REG_MHL_INT_0 0x0420
+
+/* Device Status 1st byte, default value: 0x00 */
+#define REG_MHL_STAT_0 0x0430
+
+/* CBUS Scratch Pad 1st Byte, default value: 0x00 */
+#define REG_MHL_SCRPAD_0 0x0440
+
+/* MHL Extended Capability 1st Byte, default value: 0x00 */
+#define REG_MHL_EXTDEVCAP_0 0x0480
+
+/* Device Extended Status 1st byte, default value: 0x00 */
+#define REG_MHL_EXTSTAT_0 0x0490
+
+/* TPI DTD Byte2, default value: 0x00 */
+#define REG_TPI_DTD_B2 0x0602
+
+#define VAL_TPI_QUAN_RANGE_LIMITED 0x01
+#define VAL_TPI_QUAN_RANGE_FULL 0x02
+#define VAL_TPI_FORMAT_RGB 0x00
+#define VAL_TPI_FORMAT_YCBCR444 0x01
+#define VAL_TPI_FORMAT_YCBCR422 0x02
+#define VAL_TPI_FORMAT_INTERNAL_RGB 0x03
+#define VAL_TPI_FORMAT(_fmt, _qr) \
+ (VAL_TPI_FORMAT_##_fmt | (VAL_TPI_QUAN_RANGE_##_qr << 2))
+
+/* Input Format, default value: 0x00 */
+#define REG_TPI_INPUT 0x0609
+#define BIT_TPI_INPUT_EXTENDEDBITMODE BIT(7)
+#define BIT_TPI_INPUT_ENDITHER BIT(6)
+#define MSK_TPI_INPUT_INPUT_QUAN_RANGE 0x0c
+#define MSK_TPI_INPUT_INPUT_FORMAT 0x03
+
+/* Output Format, default value: 0x00 */
+#define REG_TPI_OUTPUT 0x060a
+#define BIT_TPI_OUTPUT_CSCMODE709 BIT(4)
+#define MSK_TPI_OUTPUT_OUTPUT_QUAN_RANGE 0x0c
+#define MSK_TPI_OUTPUT_OUTPUT_FORMAT 0x03
+
+/* TPI AVI Check Sum, default value: 0x00 */
+#define REG_TPI_AVI_CHSUM 0x060c
+
+/* TPI System Control, default value: 0x00 */
+#define REG_TPI_SC 0x061a
+#define BIT_TPI_SC_TPI_UPDATE_FLG BIT(7)
+#define BIT_TPI_SC_TPI_REAUTH_CTL BIT(6)
+#define BIT_TPI_SC_TPI_OUTPUT_MODE_1 BIT(5)
+#define BIT_TPI_SC_REG_TMDS_OE_POWER_DOWN BIT(4)
+#define BIT_TPI_SC_TPI_AV_MUTE BIT(3)
+#define BIT_TPI_SC_DDC_GPU_REQUEST BIT(2)
+#define BIT_TPI_SC_DDC_TPI_SW BIT(1)
+#define BIT_TPI_SC_TPI_OUTPUT_MODE_0_HDMI BIT(0)
+
+/* TPI COPP Query Data, default value: 0x00 */
+#define REG_TPI_COPP_DATA1 0x0629
+#define BIT_TPI_COPP_DATA1_COPP_GPROT BIT(7)
+#define BIT_TPI_COPP_DATA1_COPP_LPROT BIT(6)
+#define MSK_TPI_COPP_DATA1_COPP_LINK_STATUS 0x30
+#define VAL_TPI_COPP_LINK_STATUS_NORMAL 0x00
+#define VAL_TPI_COPP_LINK_STATUS_LINK_LOST 0x10
+#define VAL_TPI_COPP_LINK_STATUS_RENEGOTIATION_REQ 0x20
+#define VAL_TPI_COPP_LINK_STATUS_LINK_SUSPENDED 0x30
+#define BIT_TPI_COPP_DATA1_COPP_HDCP_REP BIT(3)
+#define BIT_TPI_COPP_DATA1_COPP_CONNTYPE_0 BIT(2)
+#define BIT_TPI_COPP_DATA1_COPP_PROTYPE BIT(1)
+#define BIT_TPI_COPP_DATA1_COPP_CONNTYPE_1 BIT(0)
+
+/* TPI COPP Control Data, default value: 0x00 */
+#define REG_TPI_COPP_DATA2 0x062a
+#define BIT_TPI_COPP_DATA2_INTR_ENCRYPTION BIT(5)
+#define BIT_TPI_COPP_DATA2_KSV_FORWARD BIT(4)
+#define BIT_TPI_COPP_DATA2_INTERM_RI_CHECK_EN BIT(3)
+#define BIT_TPI_COPP_DATA2_DOUBLE_RI_CHECK BIT(2)
+#define BIT_TPI_COPP_DATA2_DDC_SHORT_RI_RD BIT(1)
+#define BIT_TPI_COPP_DATA2_COPP_PROTLEVEL BIT(0)
+
+/* TPI Interrupt Enable, default value: 0x00 */
+#define REG_TPI_INTR_EN 0x063c
+
+/* TPI Interrupt Status Low Byte, default value: 0x00 */
+#define REG_TPI_INTR_ST0 0x063d
+#define BIT_TPI_INTR_ST0_TPI_AUTH_CHNGE_STAT BIT(7)
+#define BIT_TPI_INTR_ST0_TPI_V_RDY_STAT BIT(6)
+#define BIT_TPI_INTR_ST0_TPI_COPP_CHNGE_STAT BIT(5)
+#define BIT_TPI_INTR_ST0_KSV_FIFO_FIRST_STAT BIT(3)
+#define BIT_TPI_INTR_ST0_READ_BKSV_BCAPS_DONE_STAT BIT(2)
+#define BIT_TPI_INTR_ST0_READ_BKSV_BCAPS_ERR_STAT BIT(1)
+#define BIT_TPI_INTR_ST0_READ_BKSV_ERR_STAT BIT(0)
+
+/* TPI DS BCAPS Status, default value: 0x00 */
+#define REG_TPI_DS_BCAPS 0x0644
+
+/* TPI BStatus1, default value: 0x00 */
+#define REG_TPI_BSTATUS1 0x0645
+#define BIT_TPI_BSTATUS1_DS_DEV_EXCEED BIT(7)
+#define MSK_TPI_BSTATUS1_DS_DEV_CNT 0x7f
+
+/* TPI BStatus2, default value: 0x10 */
+#define REG_TPI_BSTATUS2 0x0646
+#define MSK_TPI_BSTATUS2_DS_BSTATUS 0xe0
+#define BIT_TPI_BSTATUS2_DS_HDMI_MODE BIT(4)
+#define BIT_TPI_BSTATUS2_DS_CASC_EXCEED BIT(3)
+#define MSK_TPI_BSTATUS2_DS_DEPTH 0x07
+
+/* TPI HW Optimization Control #3, default value: 0x00 */
+#define REG_TPI_HW_OPT3 0x06bb
+#define BIT_TPI_HW_OPT3_DDC_DEBUG BIT(7)
+#define BIT_TPI_HW_OPT3_RI_CHECK_SKIP BIT(3)
+#define BIT_TPI_HW_OPT3_TPI_DDC_BURST_MODE BIT(2)
+#define MSK_TPI_HW_OPT3_TPI_DDC_REQ_LEVEL 0x03
+
+/* TPI Info Frame Select, default value: 0x00 */
+#define REG_TPI_INFO_FSEL 0x06bf
+#define BIT_TPI_INFO_FSEL_EN BIT(7)
+#define BIT_TPI_INFO_FSEL_RPT BIT(6)
+#define BIT_TPI_INFO_FSEL_READ_FLAG BIT(5)
+#define MSK_TPI_INFO_FSEL_PKT 0x07
+#define VAL_TPI_INFO_FSEL_AVI 0x00
+#define VAL_TPI_INFO_FSEL_SPD 0x01
+#define VAL_TPI_INFO_FSEL_AUD 0x02
+#define VAL_TPI_INFO_FSEL_MPG 0x03
+#define VAL_TPI_INFO_FSEL_GEN 0x04
+#define VAL_TPI_INFO_FSEL_GEN2 0x05
+#define VAL_TPI_INFO_FSEL_VSI 0x06
+
+/* TPI Info Byte #0, default value: 0x00 */
+#define REG_TPI_INFO_B0 0x06c0
+
+/* CoC Status, default value: 0x00 */
+#define REG_COC_STAT_0 0x0700
+#define BIT_COC_STAT_0_PLL_LOCKED BIT(7)
+#define MSK_COC_STAT_0_FSM_STATE 0x0f
+
+#define REG_COC_STAT_1 0x0701
+#define REG_COC_STAT_2 0x0702
+#define REG_COC_STAT_3 0x0703
+#define REG_COC_STAT_4 0x0704
+#define REG_COC_STAT_5 0x0705
+
+/* CoC 1st Ctl, default value: 0x40 */
+#define REG_COC_CTL0 0x0710
+
+/* CoC 2nd Ctl, default value: 0x0a */
+#define REG_COC_CTL1 0x0711
+#define MSK_COC_CTL1_COC_CTRL1_7_6 0xc0
+#define MSK_COC_CTL1_COC_CTRL1_5_0 0x3f
+
+/* CoC 3rd Ctl, default value: 0x14 */
+#define REG_COC_CTL2 0x0712
+#define MSK_COC_CTL2_COC_CTRL2_7_6 0xc0
+#define MSK_COC_CTL2_COC_CTRL2_5_0 0x3f
+
+/* CoC 4th Ctl, default value: 0x40 */
+#define REG_COC_CTL3 0x0713
+#define BIT_COC_CTL3_COC_CTRL3_7 BIT(7)
+#define MSK_COC_CTL3_COC_CTRL3_6_0 0x7f
+
+/* CoC 7th Ctl, default value: 0x00 */
+#define REG_COC_CTL6 0x0716
+#define BIT_COC_CTL6_COC_CTRL6_7 BIT(7)
+#define BIT_COC_CTL6_COC_CTRL6_6 BIT(6)
+#define MSK_COC_CTL6_COC_CTRL6_5_0 0x3f
+
+/* CoC 8th Ctl, default value: 0x06 */
+#define REG_COC_CTL7 0x0717
+#define BIT_COC_CTL7_COC_CTRL7_7 BIT(7)
+#define BIT_COC_CTL7_COC_CTRL7_6 BIT(6)
+#define BIT_COC_CTL7_COC_CTRL7_5 BIT(5)
+#define MSK_COC_CTL7_COC_CTRL7_4_3 0x18
+#define MSK_COC_CTL7_COC_CTRL7_2_0 0x07
+
+/* CoC 10th Ctl, default value: 0x00 */
+#define REG_COC_CTL9 0x0719
+
+/* CoC 11th Ctl, default value: 0x00 */
+#define REG_COC_CTLA 0x071a
+
+/* CoC 12th Ctl, default value: 0x00 */
+#define REG_COC_CTLB 0x071b
+
+/* CoC 13th Ctl, default value: 0x0f */
+#define REG_COC_CTLC 0x071c
+
+/* CoC 14th Ctl, default value: 0x0a */
+#define REG_COC_CTLD 0x071d
+#define BIT_COC_CTLD_COC_CTRLD_7 BIT(7)
+#define MSK_COC_CTLD_COC_CTRLD_6_0 0x7f
+
+/* CoC 15th Ctl, default value: 0x0a */
+#define REG_COC_CTLE 0x071e
+#define BIT_COC_CTLE_COC_CTRLE_7 BIT(7)
+#define MSK_COC_CTLE_COC_CTRLE_6_0 0x7f
+
+/* CoC 16th Ctl, default value: 0x00 */
+#define REG_COC_CTLF 0x071f
+#define MSK_COC_CTLF_COC_CTRLF_7_3 0xf8
+#define MSK_COC_CTLF_COC_CTRLF_2_0 0x07
+
+/* CoC 18th Ctl, default value: 0x32 */
+#define REG_COC_CTL11 0x0721
+#define MSK_COC_CTL11_COC_CTRL11_7_4 0xf0
+#define MSK_COC_CTL11_COC_CTRL11_3_0 0x0f
+
+/* CoC 21st Ctl, default value: 0x00 */
+#define REG_COC_CTL14 0x0724
+#define MSK_COC_CTL14_COC_CTRL14_7_4 0xf0
+#define MSK_COC_CTL14_COC_CTRL14_3_0 0x0f
+
+/* CoC 22nd Ctl, default value: 0x00 */
+#define REG_COC_CTL15 0x0725
+#define BIT_COC_CTL15_COC_CTRL15_7 BIT(7)
+#define MSK_COC_CTL15_COC_CTRL15_6_4 0x70
+#define MSK_COC_CTL15_COC_CTRL15_3_0 0x0f
+
+/* CoC Interrupt, default value: 0x00 */
+#define REG_COC_INTR 0x0726
+
+/* CoC Interrupt Mask, default value: 0x00 */
+#define REG_COC_INTR_MASK 0x0727
+#define BIT_COC_PLL_LOCK_STATUS_CHANGE BIT(0)
+#define BIT_COC_CALIBRATION_DONE BIT(1)
+
+/* CoC Misc Ctl, default value: 0x00 */
+#define REG_COC_MISC_CTL0 0x0728
+#define BIT_COC_MISC_CTL0_FSM_MON BIT(7)
+
+/* CoC 24th Ctl, default value: 0x00 */
+#define REG_COC_CTL17 0x072a
+#define MSK_COC_CTL17_COC_CTRL17_7_4 0xf0
+#define MSK_COC_CTL17_COC_CTRL17_3_0 0x0f
+
+/* CoC 25th Ctl, default value: 0x00 */
+#define REG_COC_CTL18 0x072b
+#define MSK_COC_CTL18_COC_CTRL18_7_4 0xf0
+#define MSK_COC_CTL18_COC_CTRL18_3_0 0x0f
+
+/* CoC 26th Ctl, default value: 0x00 */
+#define REG_COC_CTL19 0x072c
+#define MSK_COC_CTL19_COC_CTRL19_7_4 0xf0
+#define MSK_COC_CTL19_COC_CTRL19_3_0 0x0f
+
+/* CoC 27th Ctl, default value: 0x00 */
+#define REG_COC_CTL1A 0x072d
+#define MSK_COC_CTL1A_COC_CTRL1A_7_2 0xfc
+#define MSK_COC_CTL1A_COC_CTRL1A_1_0 0x03
+
+/* DoC 9th Status, default value: 0x00 */
+#define REG_DOC_STAT_8 0x0740
+
+/* DoC 10th Status, default value: 0x00 */
+#define REG_DOC_STAT_9 0x0741
+
+/* DoC 5th CFG, default value: 0x00 */
+#define REG_DOC_CFG4 0x074e
+#define MSK_DOC_CFG4_DBG_STATE_DOC_FSM 0x0f
+
+/* DoC 1st Ctl, default value: 0x40 */
+#define REG_DOC_CTL0 0x0751
+
+/* DoC 7th Ctl, default value: 0x00 */
+#define REG_DOC_CTL6 0x0757
+#define BIT_DOC_CTL6_DOC_CTRL6_7 BIT(7)
+#define BIT_DOC_CTL6_DOC_CTRL6_6 BIT(6)
+#define MSK_DOC_CTL6_DOC_CTRL6_5_4 0x30
+#define MSK_DOC_CTL6_DOC_CTRL6_3_0 0x0f
+
+/* DoC 8th Ctl, default value: 0x00 */
+#define REG_DOC_CTL7 0x0758
+#define BIT_DOC_CTL7_DOC_CTRL7_7 BIT(7)
+#define BIT_DOC_CTL7_DOC_CTRL7_6 BIT(6)
+#define BIT_DOC_CTL7_DOC_CTRL7_5 BIT(5)
+#define MSK_DOC_CTL7_DOC_CTRL7_4_3 0x18
+#define MSK_DOC_CTL7_DOC_CTRL7_2_0 0x07
+
+/* DoC 9th Ctl, default value: 0x00 */
+#define REG_DOC_CTL8 0x076c
+#define BIT_DOC_CTL8_DOC_CTRL8_7 BIT(7)
+#define MSK_DOC_CTL8_DOC_CTRL8_6_4 0x70
+#define MSK_DOC_CTL8_DOC_CTRL8_3_2 0x0c
+#define MSK_DOC_CTL8_DOC_CTRL8_1_0 0x03
+
+/* DoC 10th Ctl, default value: 0x00 */
+#define REG_DOC_CTL9 0x076d
+
+/* DoC 11th Ctl, default value: 0x00 */
+#define REG_DOC_CTLA 0x076e
+
+/* DoC 15th Ctl, default value: 0x00 */
+#define REG_DOC_CTLE 0x0772
+#define BIT_DOC_CTLE_DOC_CTRLE_7 BIT(7)
+#define BIT_DOC_CTLE_DOC_CTRLE_6 BIT(6)
+#define MSK_DOC_CTLE_DOC_CTRLE_5_4 0x30
+#define MSK_DOC_CTLE_DOC_CTRLE_3_0 0x0f
+
+/* Interrupt Mask 1st, default value: 0x00 */
+#define REG_MHL_INT_0_MASK 0x0580
+
+/* Interrupt Mask 2nd, default value: 0x00 */
+#define REG_MHL_INT_1_MASK 0x0581
+
+/* Interrupt Mask 3rd, default value: 0x00 */
+#define REG_MHL_INT_2_MASK 0x0582
+
+/* Interrupt Mask 4th, default value: 0x00 */
+#define REG_MHL_INT_3_MASK 0x0583
+
+/* MDT Receive Time Out, default value: 0x00 */
+#define REG_MDT_RCV_TIMEOUT 0x0584
+
+/* MDT Transmit Time Out, default value: 0x00 */
+#define REG_MDT_XMIT_TIMEOUT 0x0585
+
+/* MDT Receive Control, default value: 0x00 */
+#define REG_MDT_RCV_CTRL 0x0586
+#define BIT_MDT_RCV_CTRL_MDT_RCV_EN BIT(7)
+#define BIT_MDT_RCV_CTRL_MDT_DELAY_RCV_EN BIT(6)
+#define BIT_MDT_RCV_CTRL_MDT_RFIFO_OVER_WR_EN BIT(4)
+#define BIT_MDT_RCV_CTRL_MDT_XFIFO_OVER_WR_EN BIT(3)
+#define BIT_MDT_RCV_CTRL_MDT_DISABLE BIT(2)
+#define BIT_MDT_RCV_CTRL_MDT_RFIFO_CLR_ALL BIT(1)
+#define BIT_MDT_RCV_CTRL_MDT_RFIFO_CLR_CUR BIT(0)
+
+/* MDT Receive Read Port, default value: 0x00 */
+#define REG_MDT_RCV_READ_PORT 0x0587
+
+/* MDT Transmit Control, default value: 0x70 */
+#define REG_MDT_XMIT_CTRL 0x0588
+#define BIT_MDT_XMIT_CTRL_EN BIT(7)
+#define BIT_MDT_XMIT_CTRL_CMD_MERGE_EN BIT(6)
+#define BIT_MDT_XMIT_CTRL_FIXED_BURST_LEN BIT(5)
+#define BIT_MDT_XMIT_CTRL_FIXED_AID BIT(4)
+#define BIT_MDT_XMIT_CTRL_SINGLE_RUN_EN BIT(3)
+#define BIT_MDT_XMIT_CTRL_CLR_ABORT_WAIT BIT(2)
+#define BIT_MDT_XMIT_CTRL_XFIFO_CLR_ALL BIT(1)
+#define BIT_MDT_XMIT_CTRL_XFIFO_CLR_CUR BIT(0)
+
+/* MDT Receive WRITE Port, default value: 0x00 */
+#define REG_MDT_XMIT_WRITE_PORT 0x0589
+
+/* MDT RFIFO Status, default value: 0x00 */
+#define REG_MDT_RFIFO_STAT 0x058a
+#define MSK_MDT_RFIFO_STAT_MDT_RFIFO_CNT 0xe0
+#define MSK_MDT_RFIFO_STAT_MDT_RFIFO_CUR_BYTE_CNT 0x1f
+
+/* MDT XFIFO Status, default value: 0x80 */
+#define REG_MDT_XFIFO_STAT 0x058b
+#define MSK_MDT_XFIFO_STAT_MDT_XFIFO_LEVEL_AVAIL 0xe0
+#define BIT_MDT_XFIFO_STAT_MDT_XMIT_PRE_HS_EN BIT(4)
+#define MSK_MDT_XFIFO_STAT_MDT_WRITE_BURST_LEN 0x0f
+
+/* MDT Interrupt 0, default value: 0x0c */
+#define REG_MDT_INT_0 0x058c
+#define BIT_MDT_RFIFO_DATA_RDY BIT(0)
+#define BIT_MDT_IDLE_AFTER_HAWB_DISABLE BIT(2)
+#define BIT_MDT_XFIFO_EMPTY BIT(3)
+
+/* MDT Interrupt 0 Mask, default value: 0x00 */
+#define REG_MDT_INT_0_MASK 0x058d
+
+/* MDT Interrupt 1, default value: 0x00 */
+#define REG_MDT_INT_1 0x058e
+#define BIT_MDT_RCV_TIMEOUT BIT(0)
+#define BIT_MDT_RCV_SM_ABORT_PKT_RCVD BIT(1)
+#define BIT_MDT_RCV_SM_ERROR BIT(2)
+#define BIT_MDT_XMIT_TIMEOUT BIT(5)
+#define BIT_MDT_XMIT_SM_ABORT_PKT_RCVD BIT(6)
+#define BIT_MDT_XMIT_SM_ERROR BIT(7)
+
+/* MDT Interrupt 1 Mask, default value: 0x00 */
+#define REG_MDT_INT_1_MASK 0x058f
+
+/* CBUS Vendor ID, default value: 0x01 */
+#define REG_CBUS_VENDOR_ID 0x0590
+
+/* CBUS Connection Status, default value: 0x00 */
+#define REG_CBUS_STATUS 0x0591
+#define BIT_CBUS_STATUS_MHL_CABLE_PRESENT BIT(4)
+#define BIT_CBUS_STATUS_MSC_HB_SUCCESS BIT(3)
+#define BIT_CBUS_STATUS_CBUS_HPD BIT(2)
+#define BIT_CBUS_STATUS_MHL_MODE BIT(1)
+#define BIT_CBUS_STATUS_CBUS_CONNECTED BIT(0)
+
+/* CBUS Interrupt 1st, default value: 0x00 */
+#define REG_CBUS_INT_0 0x0592
+#define BIT_CBUS_MSC_MT_DONE_NACK BIT(7)
+#define BIT_CBUS_MSC_MR_SET_INT BIT(6)
+#define BIT_CBUS_MSC_MR_WRITE_BURST BIT(5)
+#define BIT_CBUS_MSC_MR_MSC_MSG BIT(4)
+#define BIT_CBUS_MSC_MR_WRITE_STAT BIT(3)
+#define BIT_CBUS_HPD_CHG BIT(2)
+#define BIT_CBUS_MSC_MT_DONE BIT(1)
+#define BIT_CBUS_CNX_CHG BIT(0)
+
+/* CBUS Interrupt Mask 1st, default value: 0x00 */
+#define REG_CBUS_INT_0_MASK 0x0593
+
+/* CBUS Interrupt 2nd, default value: 0x00 */
+#define REG_CBUS_INT_1 0x0594
+#define BIT_CBUS_CMD_ABORT BIT(6)
+#define BIT_CBUS_MSC_ABORT_RCVD BIT(3)
+#define BIT_CBUS_DDC_ABORT BIT(2)
+#define BIT_CBUS_CEC_ABORT BIT(1)
+
+/* CBUS Interrupt Mask 2nd, default value: 0x00 */
+#define REG_CBUS_INT_1_MASK 0x0595
+
+/* CBUS DDC Abort Interrupt, default value: 0x00 */
+#define REG_DDC_ABORT_INT 0x0598
+
+/* CBUS DDC Abort Interrupt Mask, default value: 0x00 */
+#define REG_DDC_ABORT_INT_MASK 0x0599
+
+/* CBUS MSC Requester Abort Interrupt, default value: 0x00 */
+#define REG_MSC_MT_ABORT_INT 0x059a
+
+/* CBUS MSC Requester Abort Interrupt Mask, default value: 0x00 */
+#define REG_MSC_MT_ABORT_INT_MASK 0x059b
+
+/* CBUS MSC Responder Abort Interrupt, default value: 0x00 */
+#define REG_MSC_MR_ABORT_INT 0x059c
+
+/* CBUS MSC Responder Abort Interrupt Mask, default value: 0x00 */
+#define REG_MSC_MR_ABORT_INT_MASK 0x059d
+
+/* CBUS RX DISCOVERY interrupt, default value: 0x00 */
+#define REG_CBUS_RX_DISC_INT0 0x059e
+
+/* CBUS RX DISCOVERY Interrupt Mask, default value: 0x00 */
+#define REG_CBUS_RX_DISC_INT0_MASK 0x059f
+
+/* CBUS_Link_Layer Control #8, default value: 0x00 */
+#define REG_CBUS_LINK_CTRL_8 0x05a7
+
+/* MDT State Machine Status, default value: 0x00 */
+#define REG_MDT_SM_STAT 0x05b5
+#define MSK_MDT_SM_STAT_MDT_RCV_STATE 0xf0
+#define MSK_MDT_SM_STAT_MDT_XMIT_STATE 0x0f
+
+/* CBUS MSC command trigger, default value: 0x00 */
+#define REG_MSC_COMMAND_START 0x05b8
+#define BIT_MSC_COMMAND_START_DEBUG BIT(5)
+#define BIT_MSC_COMMAND_START_WRITE_BURST BIT(4)
+#define BIT_MSC_COMMAND_START_WRITE_STAT BIT(3)
+#define BIT_MSC_COMMAND_START_READ_DEVCAP BIT(2)
+#define BIT_MSC_COMMAND_START_MSC_MSG BIT(1)
+#define BIT_MSC_COMMAND_START_PEER BIT(0)
+
+/* CBUS MSC Command/Offset, default value: 0x00 */
+#define REG_MSC_CMD_OR_OFFSET 0x05b9
+
+/* CBUS MSC Transmit Data */
+#define REG_MSC_1ST_TRANSMIT_DATA 0x05ba
+#define REG_MSC_2ND_TRANSMIT_DATA 0x05bb
+
+/* CBUS MSC Requester Received Data */
+#define REG_MSC_MT_RCVD_DATA0 0x05bc
+#define REG_MSC_MT_RCVD_DATA1 0x05bd
+
+/* CBUS MSC Responder MSC_MSG Received Data */
+#define REG_MSC_MR_MSC_MSG_RCVD_1ST_DATA 0x05bf
+#define REG_MSC_MR_MSC_MSG_RCVD_2ND_DATA 0x05c0
+
+/* CBUS MSC Heartbeat Control, default value: 0x27 */
+#define REG_MSC_HEARTBEAT_CTRL 0x05c4
+#define BIT_MSC_HEARTBEAT_CTRL_MSC_HB_EN BIT(7)
+#define MSK_MSC_HEARTBEAT_CTRL_MSC_HB_FAIL_LIMIT 0x70
+#define MSK_MSC_HEARTBEAT_CTRL_MSC_HB_PERIOD_MSB 0x0f
+
+/* CBUS MSC Compatibility Control, default value: 0x02 */
+#define REG_CBUS_MSC_COMPAT_CTRL 0x05c7
+#define BIT_CBUS_MSC_COMPAT_CTRL_XDEVCAP_EN BIT(7)
+#define BIT_CBUS_MSC_COMPAT_CTRL_DISABLE_MSC_ON_CBUS BIT(6)
+#define BIT_CBUS_MSC_COMPAT_CTRL_DISABLE_DDC_ON_CBUS BIT(5)
+#define BIT_CBUS_MSC_COMPAT_CTRL_DISABLE_GET_DDC_ERRORCODE BIT(3)
+#define BIT_CBUS_MSC_COMPAT_CTRL_DISABLE_GET_VS1_ERRORCODE BIT(2)
+
+/* CBUS3 Converter Control, default value: 0x24 */
+#define REG_CBUS3_CNVT 0x05dc
+#define MSK_CBUS3_CNVT_CBUS3_RETRYLMT 0xf0
+#define MSK_CBUS3_CNVT_CBUS3_PEERTOUT_SEL 0x0c
+#define BIT_CBUS3_CNVT_TEARCBUS_EN BIT(1)
+#define BIT_CBUS3_CNVT_CBUS3CNVT_EN BIT(0)
+
+/* Discovery Control1, default value: 0x24 */
+#define REG_DISC_CTRL1 0x05e0
+#define BIT_DISC_CTRL1_CBUS_INTR_EN BIT(7)
+#define BIT_DISC_CTRL1_HB_ONLY BIT(6)
+#define MSK_DISC_CTRL1_DISC_ATT 0x30
+#define MSK_DISC_CTRL1_DISC_CYC 0x0c
+#define BIT_DISC_CTRL1_DISC_EN BIT(0)
+
+#define VAL_PUP_OFF 0
+#define VAL_PUP_20K 1
+#define VAL_PUP_5K 2
+
+/* Discovery Control4, default value: 0x80 */
+#define REG_DISC_CTRL4 0x05e3
+#define MSK_DISC_CTRL4_CBUSDISC_PUP_SEL 0xc0
+#define MSK_DISC_CTRL4_CBUSIDLE_PUP_SEL 0x30
+#define VAL_DISC_CTRL4(pup_disc, pup_idle) (((pup_disc) << 6) | (pup_idle << 4))
+
+/* Discovery Control5, default value: 0x03 */
+#define REG_DISC_CTRL5 0x05e4
+#define BIT_DISC_CTRL5_DSM_OVRIDE BIT(3)
+#define MSK_DISC_CTRL5_CBUSMHL_PUP_SEL 0x03
+
+/* Discovery Control8, default value: 0x81 */
+#define REG_DISC_CTRL8 0x05e7
+#define BIT_DISC_CTRL8_NOMHLINT_CLR_BYPASS BIT(7)
+#define BIT_DISC_CTRL8_DELAY_CBUS_INTR_EN BIT(0)
+
+/* Discovery Control9, default value: 0x54 */
+#define REG_DISC_CTRL9 0x05e8
+#define BIT_DISC_CTRL9_MHL3_RSEN_BYP BIT(7)
+#define BIT_DISC_CTRL9_MHL3DISC_EN BIT(6)
+#define BIT_DISC_CTRL9_WAKE_DRVFLT BIT(4)
+#define BIT_DISC_CTRL9_NOMHL_EST BIT(3)
+#define BIT_DISC_CTRL9_DISC_PULSE_PROCEED BIT(2)
+#define BIT_DISC_CTRL9_WAKE_PULSE_BYPASS BIT(1)
+#define BIT_DISC_CTRL9_VBUS_OUTPUT_CAPABILITY_SRC BIT(0)
+
+/* Discovery Status1, default value: 0x00 */
+#define REG_DISC_STAT1 0x05eb
+#define BIT_DISC_STAT1_PSM_OVRIDE BIT(5)
+#define MSK_DISC_STAT1_DISC_SM 0x0f
+
+/* Discovery Status2, default value: 0x00 */
+#define REG_DISC_STAT2 0x05ec
+#define BIT_DISC_STAT2_CBUS_OE_POL BIT(6)
+#define BIT_DISC_STAT2_CBUS_SATUS BIT(5)
+#define BIT_DISC_STAT2_RSEN BIT(4)
+
+#define MSK_DISC_STAT2_MHL_VRSN 0x0c
+#define VAL_DISC_STAT2_DEFAULT 0x00
+#define VAL_DISC_STAT2_MHL1_2 0x04
+#define VAL_DISC_STAT2_MHL3 0x08
+#define VAL_DISC_STAT2_RESERVED 0x0c
+
+#define MSK_DISC_STAT2_RGND 0x03
+#define VAL_RGND_OPEN 0x00
+#define VAL_RGND_2K 0x01
+#define VAL_RGND_1K 0x02
+#define VAL_RGND_SHORT 0x03
+
+/* Interrupt CBUS_reg1 INTR0, default value: 0x00 */
+#define REG_CBUS_DISC_INTR0 0x05ed
+#define BIT_RGND_READY_INT BIT(6)
+#define BIT_CBUS_MHL12_DISCON_INT BIT(5)
+#define BIT_CBUS_MHL3_DISCON_INT BIT(4)
+#define BIT_NOT_MHL_EST_INT BIT(3)
+#define BIT_MHL_EST_INT BIT(2)
+#define BIT_MHL3_EST_INT BIT(1)
+#define VAL_CBUS_MHL_DISCON (BIT_CBUS_MHL12_DISCON_INT \
+ | BIT_CBUS_MHL3_DISCON_INT \
+ | BIT_NOT_MHL_EST_INT)
+
+/* Interrupt CBUS_reg1 INTR0 Mask, default value: 0x00 */
+#define REG_CBUS_DISC_INTR0_MASK 0x05ee
+
+#endif /* __SIL_SII8620_H__ */
diff --git a/drivers/gpu/drm/bridge/simple-bridge.c b/drivers/gpu/drm/bridge/simple-bridge.c
new file mode 100644
index 000000000..2c5c5211b
--- /dev/null
+++ b/drivers/gpu/drm/bridge/simple-bridge.c
@@ -0,0 +1,314 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2015-2016 Free Electrons
+ * Copyright (C) 2015-2016 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ */
+
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+struct simple_bridge_info {
+ const struct drm_bridge_timings *timings;
+ unsigned int connector_type;
+};
+
+struct simple_bridge {
+ struct drm_bridge bridge;
+ struct drm_connector connector;
+
+ const struct simple_bridge_info *info;
+
+ struct drm_bridge *next_bridge;
+ struct regulator *vdd;
+ struct gpio_desc *enable;
+};
+
+static inline struct simple_bridge *
+drm_bridge_to_simple_bridge(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct simple_bridge, bridge);
+}
+
+static inline struct simple_bridge *
+drm_connector_to_simple_bridge(struct drm_connector *connector)
+{
+ return container_of(connector, struct simple_bridge, connector);
+}
+
+static int simple_bridge_get_modes(struct drm_connector *connector)
+{
+ struct simple_bridge *sbridge = drm_connector_to_simple_bridge(connector);
+ struct edid *edid;
+ int ret;
+
+ if (sbridge->next_bridge->ops & DRM_BRIDGE_OP_EDID) {
+ edid = drm_bridge_get_edid(sbridge->next_bridge, connector);
+ if (!edid)
+ DRM_INFO("EDID read failed. Fallback to standard modes\n");
+ } else {
+ edid = NULL;
+ }
+
+ if (!edid) {
+ /*
+ * In case we cannot retrieve the EDIDs (missing or broken DDC
+ * bus from the next bridge), fallback on the XGA standards and
+ * prefer a mode pretty much anyone can handle.
+ */
+ ret = drm_add_modes_noedid(connector, 1920, 1200);
+ drm_set_preferred_mode(connector, 1024, 768);
+ return ret;
+ }
+
+ drm_connector_update_edid_property(connector, edid);
+ ret = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+
+ return ret;
+}
+
+static const struct drm_connector_helper_funcs simple_bridge_con_helper_funcs = {
+ .get_modes = simple_bridge_get_modes,
+};
+
+static enum drm_connector_status
+simple_bridge_connector_detect(struct drm_connector *connector, bool force)
+{
+ struct simple_bridge *sbridge = drm_connector_to_simple_bridge(connector);
+
+ return drm_bridge_detect(sbridge->next_bridge);
+}
+
+static const struct drm_connector_funcs simple_bridge_con_funcs = {
+ .detect = simple_bridge_connector_detect,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int simple_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct simple_bridge *sbridge = drm_bridge_to_simple_bridge(bridge);
+ int ret;
+
+ ret = drm_bridge_attach(bridge->encoder, sbridge->next_bridge, bridge,
+ DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+ if (ret < 0)
+ return ret;
+
+ if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
+ return 0;
+
+ if (!bridge->encoder) {
+ DRM_ERROR("Missing encoder\n");
+ return -ENODEV;
+ }
+
+ drm_connector_helper_add(&sbridge->connector,
+ &simple_bridge_con_helper_funcs);
+ ret = drm_connector_init_with_ddc(bridge->dev, &sbridge->connector,
+ &simple_bridge_con_funcs,
+ sbridge->info->connector_type,
+ sbridge->next_bridge->ddc);
+ if (ret) {
+ DRM_ERROR("Failed to initialize connector\n");
+ return ret;
+ }
+
+ drm_connector_attach_encoder(&sbridge->connector, bridge->encoder);
+
+ return 0;
+}
+
+static void simple_bridge_enable(struct drm_bridge *bridge)
+{
+ struct simple_bridge *sbridge = drm_bridge_to_simple_bridge(bridge);
+ int ret;
+
+ if (sbridge->vdd) {
+ ret = regulator_enable(sbridge->vdd);
+ if (ret)
+ DRM_ERROR("Failed to enable vdd regulator: %d\n", ret);
+ }
+
+ gpiod_set_value_cansleep(sbridge->enable, 1);
+}
+
+static void simple_bridge_disable(struct drm_bridge *bridge)
+{
+ struct simple_bridge *sbridge = drm_bridge_to_simple_bridge(bridge);
+
+ gpiod_set_value_cansleep(sbridge->enable, 0);
+
+ if (sbridge->vdd)
+ regulator_disable(sbridge->vdd);
+}
+
+static const struct drm_bridge_funcs simple_bridge_bridge_funcs = {
+ .attach = simple_bridge_attach,
+ .enable = simple_bridge_enable,
+ .disable = simple_bridge_disable,
+};
+
+static int simple_bridge_probe(struct platform_device *pdev)
+{
+ struct simple_bridge *sbridge;
+ struct device_node *remote;
+
+ sbridge = devm_kzalloc(&pdev->dev, sizeof(*sbridge), GFP_KERNEL);
+ if (!sbridge)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, sbridge);
+
+ sbridge->info = of_device_get_match_data(&pdev->dev);
+
+ /* Get the next bridge in the pipeline. */
+ remote = of_graph_get_remote_node(pdev->dev.of_node, 1, -1);
+ if (!remote)
+ return -EINVAL;
+
+ sbridge->next_bridge = of_drm_find_bridge(remote);
+ of_node_put(remote);
+
+ if (!sbridge->next_bridge) {
+ dev_dbg(&pdev->dev, "Next bridge not found, deferring probe\n");
+ return -EPROBE_DEFER;
+ }
+
+ /* Get the regulator and GPIO resources. */
+ sbridge->vdd = devm_regulator_get_optional(&pdev->dev, "vdd");
+ if (IS_ERR(sbridge->vdd)) {
+ int ret = PTR_ERR(sbridge->vdd);
+ if (ret == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ sbridge->vdd = NULL;
+ dev_dbg(&pdev->dev, "No vdd regulator found: %d\n", ret);
+ }
+
+ sbridge->enable = devm_gpiod_get_optional(&pdev->dev, "enable",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(sbridge->enable)) {
+ if (PTR_ERR(sbridge->enable) != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "Unable to retrieve enable GPIO\n");
+ return PTR_ERR(sbridge->enable);
+ }
+
+ /* Register the bridge. */
+ sbridge->bridge.funcs = &simple_bridge_bridge_funcs;
+ sbridge->bridge.of_node = pdev->dev.of_node;
+ sbridge->bridge.timings = sbridge->info->timings;
+
+ drm_bridge_add(&sbridge->bridge);
+
+ return 0;
+}
+
+static int simple_bridge_remove(struct platform_device *pdev)
+{
+ struct simple_bridge *sbridge = platform_get_drvdata(pdev);
+
+ drm_bridge_remove(&sbridge->bridge);
+
+ return 0;
+}
+
+/*
+ * We assume the ADV7123 DAC is the "default" for historical reasons
+ * Information taken from the ADV7123 datasheet, revision D.
+ * NOTE: the ADV7123EP seems to have other timings and need a new timings
+ * set if used.
+ */
+static const struct drm_bridge_timings default_bridge_timings = {
+ /* Timing specifications, datasheet page 7 */
+ .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE,
+ .setup_time_ps = 500,
+ .hold_time_ps = 1500,
+};
+
+/*
+ * Information taken from the THS8134, THS8134A, THS8134B datasheet named
+ * "SLVS205D", dated May 1990, revised March 2000.
+ */
+static const struct drm_bridge_timings ti_ths8134_bridge_timings = {
+ /* From timing diagram, datasheet page 9 */
+ .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE,
+ /* From datasheet, page 12 */
+ .setup_time_ps = 3000,
+ /* I guess this means latched input */
+ .hold_time_ps = 0,
+};
+
+/*
+ * Information taken from the THS8135 datasheet named "SLAS343B", dated
+ * May 2001, revised April 2013.
+ */
+static const struct drm_bridge_timings ti_ths8135_bridge_timings = {
+ /* From timing diagram, datasheet page 14 */
+ .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE,
+ /* From datasheet, page 16 */
+ .setup_time_ps = 2000,
+ .hold_time_ps = 500,
+};
+
+static const struct of_device_id simple_bridge_match[] = {
+ {
+ .compatible = "dumb-vga-dac",
+ .data = &(const struct simple_bridge_info) {
+ .connector_type = DRM_MODE_CONNECTOR_VGA,
+ },
+ }, {
+ .compatible = "adi,adv7123",
+ .data = &(const struct simple_bridge_info) {
+ .timings = &default_bridge_timings,
+ .connector_type = DRM_MODE_CONNECTOR_VGA,
+ },
+ }, {
+ .compatible = "ti,opa362",
+ .data = &(const struct simple_bridge_info) {
+ .connector_type = DRM_MODE_CONNECTOR_Composite,
+ },
+ }, {
+ .compatible = "ti,ths8135",
+ .data = &(const struct simple_bridge_info) {
+ .timings = &ti_ths8135_bridge_timings,
+ .connector_type = DRM_MODE_CONNECTOR_VGA,
+ },
+ }, {
+ .compatible = "ti,ths8134",
+ .data = &(const struct simple_bridge_info) {
+ .timings = &ti_ths8134_bridge_timings,
+ .connector_type = DRM_MODE_CONNECTOR_VGA,
+ },
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, simple_bridge_match);
+
+static struct platform_driver simple_bridge_driver = {
+ .probe = simple_bridge_probe,
+ .remove = simple_bridge_remove,
+ .driver = {
+ .name = "simple-bridge",
+ .of_match_table = simple_bridge_match,
+ },
+};
+module_platform_driver(simple_bridge_driver);
+
+MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
+MODULE_DESCRIPTION("Simple DRM bridge driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/bridge/synopsys/Kconfig b/drivers/gpu/drm/bridge/synopsys/Kconfig
new file mode 100644
index 000000000..15fc182d0
--- /dev/null
+++ b/drivers/gpu/drm/bridge/synopsys/Kconfig
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config DRM_DW_HDMI
+ tristate
+ select DRM_DISPLAY_HDMI_HELPER
+ select DRM_DISPLAY_HELPER
+ select DRM_KMS_HELPER
+ select REGMAP_MMIO
+ select CEC_CORE if CEC_NOTIFIER
+
+config DRM_DW_HDMI_AHB_AUDIO
+ tristate "Synopsys Designware AHB Audio interface"
+ depends on DRM_DW_HDMI && SND
+ select SND_PCM
+ select SND_PCM_ELD
+ select SND_PCM_IEC958
+ help
+ Support the AHB Audio interface which is part of the Synopsys
+ Designware HDMI block. This is used in conjunction with
+ the i.MX6 HDMI driver.
+
+config DRM_DW_HDMI_I2S_AUDIO
+ tristate "Synopsys Designware I2S Audio interface"
+ depends on SND_SOC
+ depends on DRM_DW_HDMI
+ select SND_SOC_HDMI_CODEC
+ help
+ Support the I2S Audio interface which is part of the Synopsys
+ Designware HDMI block.
+
+config DRM_DW_HDMI_GP_AUDIO
+ tristate "Synopsys Designware GP Audio interface"
+ depends on DRM_DW_HDMI && SND
+ select SND_PCM
+ select SND_PCM_ELD
+ select SND_PCM_IEC958
+ help
+ Support the GP Audio interface which is part of the Synopsys
+ Designware HDMI block.
+
+config DRM_DW_HDMI_CEC
+ tristate "Synopsis Designware CEC interface"
+ depends on DRM_DW_HDMI
+ select CEC_CORE
+ select CEC_NOTIFIER
+ help
+ Support the CE interface which is part of the Synopsys
+ Designware HDMI block.
+
+config DRM_DW_MIPI_DSI
+ tristate
+ select DRM_KMS_HELPER
+ select DRM_MIPI_DSI
+ select DRM_PANEL_BRIDGE
diff --git a/drivers/gpu/drm/bridge/synopsys/Makefile b/drivers/gpu/drm/bridge/synopsys/Makefile
new file mode 100644
index 000000000..ce715562e
--- /dev/null
+++ b/drivers/gpu/drm/bridge/synopsys/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_DRM_DW_HDMI) += dw-hdmi.o
+obj-$(CONFIG_DRM_DW_HDMI_AHB_AUDIO) += dw-hdmi-ahb-audio.o
+obj-$(CONFIG_DRM_DW_HDMI_GP_AUDIO) += dw-hdmi-gp-audio.o
+obj-$(CONFIG_DRM_DW_HDMI_I2S_AUDIO) += dw-hdmi-i2s-audio.o
+obj-$(CONFIG_DRM_DW_HDMI_CEC) += dw-hdmi-cec.o
+
+obj-$(CONFIG_DRM_DW_MIPI_DSI) += dw-mipi-dsi.o
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c
new file mode 100644
index 000000000..4efb62bcd
--- /dev/null
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c
@@ -0,0 +1,640 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * DesignWare HDMI audio driver
+ *
+ * Written and tested against the Designware HDMI Tx found in iMX6.
+ */
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <drm/bridge/dw_hdmi.h>
+#include <drm/drm_edid.h>
+
+#include <sound/asoundef.h>
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_drm_eld.h>
+#include <sound/pcm_iec958.h>
+
+#include "dw-hdmi-audio.h"
+
+#define DRIVER_NAME "dw-hdmi-ahb-audio"
+
+/* Provide some bits rather than bit offsets */
+enum {
+ HDMI_AHB_DMA_CONF0_SW_FIFO_RST = BIT(7),
+ HDMI_AHB_DMA_CONF0_EN_HLOCK = BIT(3),
+ HDMI_AHB_DMA_START_START = BIT(0),
+ HDMI_AHB_DMA_STOP_STOP = BIT(0),
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_ERROR = BIT(5),
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_LOST = BIT(4),
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_RETRY = BIT(3),
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_DONE = BIT(2),
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_BUFFFULL = BIT(1),
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_BUFFEMPTY = BIT(0),
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_ALL =
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_ERROR |
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_LOST |
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_RETRY |
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_DONE |
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_BUFFFULL |
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_BUFFEMPTY,
+ HDMI_IH_AHBDMAAUD_STAT0_ERROR = BIT(5),
+ HDMI_IH_AHBDMAAUD_STAT0_LOST = BIT(4),
+ HDMI_IH_AHBDMAAUD_STAT0_RETRY = BIT(3),
+ HDMI_IH_AHBDMAAUD_STAT0_DONE = BIT(2),
+ HDMI_IH_AHBDMAAUD_STAT0_BUFFFULL = BIT(1),
+ HDMI_IH_AHBDMAAUD_STAT0_BUFFEMPTY = BIT(0),
+ HDMI_IH_AHBDMAAUD_STAT0_ALL =
+ HDMI_IH_AHBDMAAUD_STAT0_ERROR |
+ HDMI_IH_AHBDMAAUD_STAT0_LOST |
+ HDMI_IH_AHBDMAAUD_STAT0_RETRY |
+ HDMI_IH_AHBDMAAUD_STAT0_DONE |
+ HDMI_IH_AHBDMAAUD_STAT0_BUFFFULL |
+ HDMI_IH_AHBDMAAUD_STAT0_BUFFEMPTY,
+ HDMI_AHB_DMA_CONF0_INCR16 = 2 << 1,
+ HDMI_AHB_DMA_CONF0_INCR8 = 1 << 1,
+ HDMI_AHB_DMA_CONF0_INCR4 = 0,
+ HDMI_AHB_DMA_CONF0_BURST_MODE = BIT(0),
+ HDMI_AHB_DMA_MASK_DONE = BIT(7),
+
+ HDMI_REVISION_ID = 0x0001,
+ HDMI_IH_AHBDMAAUD_STAT0 = 0x0109,
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0 = 0x0189,
+ HDMI_AHB_DMA_CONF0 = 0x3600,
+ HDMI_AHB_DMA_START = 0x3601,
+ HDMI_AHB_DMA_STOP = 0x3602,
+ HDMI_AHB_DMA_THRSLD = 0x3603,
+ HDMI_AHB_DMA_STRADDR0 = 0x3604,
+ HDMI_AHB_DMA_STPADDR0 = 0x3608,
+ HDMI_AHB_DMA_MASK = 0x3614,
+ HDMI_AHB_DMA_POL = 0x3615,
+ HDMI_AHB_DMA_CONF1 = 0x3616,
+ HDMI_AHB_DMA_BUFFPOL = 0x361a,
+};
+
+struct dw_hdmi_channel_conf {
+ u8 conf1;
+ u8 ca;
+};
+
+/*
+ * The default mapping of ALSA channels to HDMI channels and speaker
+ * allocation bits. Note that we can't do channel remapping here -
+ * channels must be in the same order.
+ *
+ * Mappings for alsa-lib pcm/surround*.conf files:
+ *
+ * Front Sur4.0 Sur4.1 Sur5.0 Sur5.1 Sur7.1
+ * Channels 2 4 6 6 6 8
+ *
+ * Our mapping from ALSA channel to CEA686D speaker name and HDMI channel:
+ *
+ * Number of ALSA channels
+ * ALSA Channel 2 3 4 5 6 7 8
+ * 0 FL:0 = = = = = =
+ * 1 FR:1 = = = = = =
+ * 2 FC:3 RL:4 LFE:2 = = =
+ * 3 RR:5 RL:4 FC:3 = =
+ * 4 RR:5 RL:4 = =
+ * 5 RR:5 = =
+ * 6 RC:6 =
+ * 7 RLC/FRC RLC/FRC
+ */
+static struct dw_hdmi_channel_conf default_hdmi_channel_config[7] = {
+ { 0x03, 0x00 }, /* FL,FR */
+ { 0x0b, 0x02 }, /* FL,FR,FC */
+ { 0x33, 0x08 }, /* FL,FR,RL,RR */
+ { 0x37, 0x09 }, /* FL,FR,LFE,RL,RR */
+ { 0x3f, 0x0b }, /* FL,FR,LFE,FC,RL,RR */
+ { 0x7f, 0x0f }, /* FL,FR,LFE,FC,RL,RR,RC */
+ { 0xff, 0x13 }, /* FL,FR,LFE,FC,RL,RR,[FR]RC,[FR]LC */
+};
+
+struct snd_dw_hdmi {
+ struct snd_card *card;
+ struct snd_pcm *pcm;
+ spinlock_t lock;
+ struct dw_hdmi_audio_data data;
+ struct snd_pcm_substream *substream;
+ void (*reformat)(struct snd_dw_hdmi *, size_t, size_t);
+ void *buf_src;
+ void *buf_dst;
+ dma_addr_t buf_addr;
+ unsigned buf_offset;
+ unsigned buf_period;
+ unsigned buf_size;
+ unsigned channels;
+ u8 revision;
+ u8 iec_offset;
+ u8 cs[192][8];
+};
+
+static void dw_hdmi_writel(u32 val, void __iomem *ptr)
+{
+ writeb_relaxed(val, ptr);
+ writeb_relaxed(val >> 8, ptr + 1);
+ writeb_relaxed(val >> 16, ptr + 2);
+ writeb_relaxed(val >> 24, ptr + 3);
+}
+
+/*
+ * Convert to hardware format: The userspace buffer contains IEC958 samples,
+ * with the PCUV bits in bits 31..28 and audio samples in bits 27..4. We
+ * need these to be in bits 27..24, with the IEC B bit in bit 28, and audio
+ * samples in 23..0.
+ *
+ * Default preamble in bits 3..0: 8 = block start, 4 = even 2 = odd
+ *
+ * Ideally, we could do with having the data properly formatted in userspace.
+ */
+static void dw_hdmi_reformat_iec958(struct snd_dw_hdmi *dw,
+ size_t offset, size_t bytes)
+{
+ u32 *src = dw->buf_src + offset;
+ u32 *dst = dw->buf_dst + offset;
+ u32 *end = dw->buf_src + offset + bytes;
+
+ do {
+ u32 b, sample = *src++;
+
+ b = (sample & 8) << (28 - 3);
+
+ sample >>= 4;
+
+ *dst++ = sample | b;
+ } while (src < end);
+}
+
+static u32 parity(u32 sample)
+{
+ sample ^= sample >> 16;
+ sample ^= sample >> 8;
+ sample ^= sample >> 4;
+ sample ^= sample >> 2;
+ sample ^= sample >> 1;
+ return (sample & 1) << 27;
+}
+
+static void dw_hdmi_reformat_s24(struct snd_dw_hdmi *dw,
+ size_t offset, size_t bytes)
+{
+ u32 *src = dw->buf_src + offset;
+ u32 *dst = dw->buf_dst + offset;
+ u32 *end = dw->buf_src + offset + bytes;
+
+ do {
+ unsigned i;
+ u8 *cs;
+
+ cs = dw->cs[dw->iec_offset++];
+ if (dw->iec_offset >= 192)
+ dw->iec_offset = 0;
+
+ i = dw->channels;
+ do {
+ u32 sample = *src++;
+
+ sample &= ~0xff000000;
+ sample |= *cs++ << 24;
+ sample |= parity(sample & ~0xf8000000);
+
+ *dst++ = sample;
+ } while (--i);
+ } while (src < end);
+}
+
+static void dw_hdmi_create_cs(struct snd_dw_hdmi *dw,
+ struct snd_pcm_runtime *runtime)
+{
+ u8 cs[4];
+ unsigned ch, i, j;
+
+ snd_pcm_create_iec958_consumer(runtime, cs, sizeof(cs));
+
+ memset(dw->cs, 0, sizeof(dw->cs));
+
+ for (ch = 0; ch < 8; ch++) {
+ cs[2] &= ~IEC958_AES2_CON_CHANNEL;
+ cs[2] |= (ch + 1) << 4;
+
+ for (i = 0; i < ARRAY_SIZE(cs); i++) {
+ unsigned c = cs[i];
+
+ for (j = 0; j < 8; j++, c >>= 1)
+ dw->cs[i * 8 + j][ch] = (c & 1) << 2;
+ }
+ }
+ dw->cs[0][0] |= BIT(4);
+}
+
+static void dw_hdmi_start_dma(struct snd_dw_hdmi *dw)
+{
+ void __iomem *base = dw->data.base;
+ unsigned offset = dw->buf_offset;
+ unsigned period = dw->buf_period;
+ u32 start, stop;
+
+ dw->reformat(dw, offset, period);
+
+ /* Clear all irqs before enabling irqs and starting DMA */
+ writeb_relaxed(HDMI_IH_AHBDMAAUD_STAT0_ALL,
+ base + HDMI_IH_AHBDMAAUD_STAT0);
+
+ start = dw->buf_addr + offset;
+ stop = start + period - 1;
+
+ /* Setup the hardware start/stop addresses */
+ dw_hdmi_writel(start, base + HDMI_AHB_DMA_STRADDR0);
+ dw_hdmi_writel(stop, base + HDMI_AHB_DMA_STPADDR0);
+
+ writeb_relaxed((u8)~HDMI_AHB_DMA_MASK_DONE, base + HDMI_AHB_DMA_MASK);
+ writeb(HDMI_AHB_DMA_START_START, base + HDMI_AHB_DMA_START);
+
+ offset += period;
+ if (offset >= dw->buf_size)
+ offset = 0;
+ dw->buf_offset = offset;
+}
+
+static void dw_hdmi_stop_dma(struct snd_dw_hdmi *dw)
+{
+ /* Disable interrupts before disabling DMA */
+ writeb_relaxed(~0, dw->data.base + HDMI_AHB_DMA_MASK);
+ writeb_relaxed(HDMI_AHB_DMA_STOP_STOP, dw->data.base + HDMI_AHB_DMA_STOP);
+}
+
+static irqreturn_t snd_dw_hdmi_irq(int irq, void *data)
+{
+ struct snd_dw_hdmi *dw = data;
+ struct snd_pcm_substream *substream;
+ unsigned stat;
+
+ stat = readb_relaxed(dw->data.base + HDMI_IH_AHBDMAAUD_STAT0);
+ if (!stat)
+ return IRQ_NONE;
+
+ writeb_relaxed(stat, dw->data.base + HDMI_IH_AHBDMAAUD_STAT0);
+
+ substream = dw->substream;
+ if (stat & HDMI_IH_AHBDMAAUD_STAT0_DONE && substream) {
+ snd_pcm_period_elapsed(substream);
+
+ spin_lock(&dw->lock);
+ if (dw->substream)
+ dw_hdmi_start_dma(dw);
+ spin_unlock(&dw->lock);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static const struct snd_pcm_hardware dw_hdmi_hw = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID,
+ .formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE |
+ SNDRV_PCM_FMTBIT_S24_LE,
+ .rates = SNDRV_PCM_RATE_32000 |
+ SNDRV_PCM_RATE_44100 |
+ SNDRV_PCM_RATE_48000 |
+ SNDRV_PCM_RATE_88200 |
+ SNDRV_PCM_RATE_96000 |
+ SNDRV_PCM_RATE_176400 |
+ SNDRV_PCM_RATE_192000,
+ .channels_min = 2,
+ .channels_max = 8,
+ .buffer_bytes_max = 1024 * 1024,
+ .period_bytes_min = 256,
+ .period_bytes_max = 8192, /* ERR004323: must limit to 8k */
+ .periods_min = 2,
+ .periods_max = 16,
+ .fifo_size = 0,
+};
+
+static int dw_hdmi_open(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_dw_hdmi *dw = substream->private_data;
+ void __iomem *base = dw->data.base;
+ u8 *eld;
+ int ret;
+
+ runtime->hw = dw_hdmi_hw;
+
+ eld = dw->data.get_eld(dw->data.hdmi);
+ if (eld) {
+ ret = snd_pcm_hw_constraint_eld(runtime, eld);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = snd_pcm_limit_hw_rates(runtime);
+ if (ret < 0)
+ return ret;
+
+ ret = snd_pcm_hw_constraint_integer(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+ if (ret < 0)
+ return ret;
+
+ /* Limit the buffer size to the size of the preallocated buffer */
+ ret = snd_pcm_hw_constraint_minmax(runtime,
+ SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
+ 0, substream->dma_buffer.bytes);
+ if (ret < 0)
+ return ret;
+
+ /* Clear FIFO */
+ writeb_relaxed(HDMI_AHB_DMA_CONF0_SW_FIFO_RST,
+ base + HDMI_AHB_DMA_CONF0);
+
+ /* Configure interrupt polarities */
+ writeb_relaxed(~0, base + HDMI_AHB_DMA_POL);
+ writeb_relaxed(~0, base + HDMI_AHB_DMA_BUFFPOL);
+
+ /* Keep interrupts masked, and clear any pending */
+ writeb_relaxed(~0, base + HDMI_AHB_DMA_MASK);
+ writeb_relaxed(~0, base + HDMI_IH_AHBDMAAUD_STAT0);
+
+ ret = request_irq(dw->data.irq, snd_dw_hdmi_irq, IRQF_SHARED,
+ "dw-hdmi-audio", dw);
+ if (ret)
+ return ret;
+
+ /* Un-mute done interrupt */
+ writeb_relaxed(HDMI_IH_MUTE_AHBDMAAUD_STAT0_ALL &
+ ~HDMI_IH_MUTE_AHBDMAAUD_STAT0_DONE,
+ base + HDMI_IH_MUTE_AHBDMAAUD_STAT0);
+
+ return 0;
+}
+
+static int dw_hdmi_close(struct snd_pcm_substream *substream)
+{
+ struct snd_dw_hdmi *dw = substream->private_data;
+
+ /* Mute all interrupts */
+ writeb_relaxed(HDMI_IH_MUTE_AHBDMAAUD_STAT0_ALL,
+ dw->data.base + HDMI_IH_MUTE_AHBDMAAUD_STAT0);
+
+ free_irq(dw->data.irq, dw);
+
+ return 0;
+}
+
+static int dw_hdmi_hw_free(struct snd_pcm_substream *substream)
+{
+ return snd_pcm_lib_free_vmalloc_buffer(substream);
+}
+
+static int dw_hdmi_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ /* Allocate the PCM runtime buffer, which is exposed to userspace. */
+ return snd_pcm_lib_alloc_vmalloc_buffer(substream,
+ params_buffer_bytes(params));
+}
+
+static int dw_hdmi_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_dw_hdmi *dw = substream->private_data;
+ u8 threshold, conf0, conf1, ca;
+
+ /* Setup as per 3.0.5 FSL 4.1.0 BSP */
+ switch (dw->revision) {
+ case 0x0a:
+ conf0 = HDMI_AHB_DMA_CONF0_BURST_MODE |
+ HDMI_AHB_DMA_CONF0_INCR4;
+ if (runtime->channels == 2)
+ threshold = 126;
+ else
+ threshold = 124;
+ break;
+ case 0x1a:
+ conf0 = HDMI_AHB_DMA_CONF0_BURST_MODE |
+ HDMI_AHB_DMA_CONF0_INCR8;
+ threshold = 128;
+ break;
+ default:
+ /* NOTREACHED */
+ return -EINVAL;
+ }
+
+ dw_hdmi_set_sample_rate(dw->data.hdmi, runtime->rate);
+
+ /* Minimum number of bytes in the fifo. */
+ runtime->hw.fifo_size = threshold * 32;
+
+ conf0 |= HDMI_AHB_DMA_CONF0_EN_HLOCK;
+ conf1 = default_hdmi_channel_config[runtime->channels - 2].conf1;
+ ca = default_hdmi_channel_config[runtime->channels - 2].ca;
+
+ writeb_relaxed(threshold, dw->data.base + HDMI_AHB_DMA_THRSLD);
+ writeb_relaxed(conf0, dw->data.base + HDMI_AHB_DMA_CONF0);
+ writeb_relaxed(conf1, dw->data.base + HDMI_AHB_DMA_CONF1);
+
+ dw_hdmi_set_channel_count(dw->data.hdmi, runtime->channels);
+ dw_hdmi_set_channel_allocation(dw->data.hdmi, ca);
+
+ switch (runtime->format) {
+ case SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE:
+ dw->reformat = dw_hdmi_reformat_iec958;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ dw_hdmi_create_cs(dw, runtime);
+ dw->reformat = dw_hdmi_reformat_s24;
+ break;
+ }
+ dw->iec_offset = 0;
+ dw->channels = runtime->channels;
+ dw->buf_src = runtime->dma_area;
+ dw->buf_dst = substream->dma_buffer.area;
+ dw->buf_addr = substream->dma_buffer.addr;
+ dw->buf_period = snd_pcm_lib_period_bytes(substream);
+ dw->buf_size = snd_pcm_lib_buffer_bytes(substream);
+
+ return 0;
+}
+
+static int dw_hdmi_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct snd_dw_hdmi *dw = substream->private_data;
+ unsigned long flags;
+ int ret = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ spin_lock_irqsave(&dw->lock, flags);
+ dw->buf_offset = 0;
+ dw->substream = substream;
+ dw_hdmi_start_dma(dw);
+ dw_hdmi_audio_enable(dw->data.hdmi);
+ spin_unlock_irqrestore(&dw->lock, flags);
+ substream->runtime->delay = substream->runtime->period_size;
+ break;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ spin_lock_irqsave(&dw->lock, flags);
+ dw->substream = NULL;
+ dw_hdmi_stop_dma(dw);
+ dw_hdmi_audio_disable(dw->data.hdmi);
+ spin_unlock_irqrestore(&dw->lock, flags);
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static snd_pcm_uframes_t dw_hdmi_pointer(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_dw_hdmi *dw = substream->private_data;
+
+ /*
+ * We are unable to report the exact hardware position as
+ * reading the 32-bit DMA position using 8-bit reads is racy.
+ */
+ return bytes_to_frames(runtime, dw->buf_offset);
+}
+
+static const struct snd_pcm_ops snd_dw_hdmi_ops = {
+ .open = dw_hdmi_open,
+ .close = dw_hdmi_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = dw_hdmi_hw_params,
+ .hw_free = dw_hdmi_hw_free,
+ .prepare = dw_hdmi_prepare,
+ .trigger = dw_hdmi_trigger,
+ .pointer = dw_hdmi_pointer,
+ .page = snd_pcm_lib_get_vmalloc_page,
+};
+
+static int snd_dw_hdmi_probe(struct platform_device *pdev)
+{
+ const struct dw_hdmi_audio_data *data = pdev->dev.platform_data;
+ struct device *dev = pdev->dev.parent;
+ struct snd_dw_hdmi *dw;
+ struct snd_card *card;
+ struct snd_pcm *pcm;
+ unsigned revision;
+ int ret;
+
+ writeb_relaxed(HDMI_IH_MUTE_AHBDMAAUD_STAT0_ALL,
+ data->base + HDMI_IH_MUTE_AHBDMAAUD_STAT0);
+ revision = readb_relaxed(data->base + HDMI_REVISION_ID);
+ if (revision != 0x0a && revision != 0x1a) {
+ dev_err(dev, "dw-hdmi-audio: unknown revision 0x%02x\n",
+ revision);
+ return -ENXIO;
+ }
+
+ ret = snd_card_new(dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
+ THIS_MODULE, sizeof(struct snd_dw_hdmi), &card);
+ if (ret < 0)
+ return ret;
+
+ strscpy(card->driver, DRIVER_NAME, sizeof(card->driver));
+ strscpy(card->shortname, "DW-HDMI", sizeof(card->shortname));
+ snprintf(card->longname, sizeof(card->longname),
+ "%s rev 0x%02x, irq %d", card->shortname, revision,
+ data->irq);
+
+ dw = card->private_data;
+ dw->card = card;
+ dw->data = *data;
+ dw->revision = revision;
+
+ spin_lock_init(&dw->lock);
+
+ ret = snd_pcm_new(card, "DW HDMI", 0, 1, 0, &pcm);
+ if (ret < 0)
+ goto err;
+
+ dw->pcm = pcm;
+ pcm->private_data = dw;
+ strscpy(pcm->name, DRIVER_NAME, sizeof(pcm->name));
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_dw_hdmi_ops);
+
+ /*
+ * To support 8-channel 96kHz audio reliably, we need 512k
+ * to satisfy alsa with our restricted period (ERR004323).
+ */
+ snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+ dev, 128 * 1024, 1024 * 1024);
+
+ ret = snd_card_register(card);
+ if (ret < 0)
+ goto err;
+
+ platform_set_drvdata(pdev, dw);
+
+ return 0;
+
+err:
+ snd_card_free(card);
+ return ret;
+}
+
+static int snd_dw_hdmi_remove(struct platform_device *pdev)
+{
+ struct snd_dw_hdmi *dw = platform_get_drvdata(pdev);
+
+ snd_card_free(dw->card);
+
+ return 0;
+}
+
+#if defined(CONFIG_PM_SLEEP) && defined(IS_NOT_BROKEN)
+/*
+ * This code is fine, but requires implementation in the dw_hdmi_trigger()
+ * method which is currently missing as I have no way to test this.
+ */
+static int snd_dw_hdmi_suspend(struct device *dev)
+{
+ struct snd_dw_hdmi *dw = dev_get_drvdata(dev);
+
+ snd_power_change_state(dw->card, SNDRV_CTL_POWER_D3cold);
+
+ return 0;
+}
+
+static int snd_dw_hdmi_resume(struct device *dev)
+{
+ struct snd_dw_hdmi *dw = dev_get_drvdata(dev);
+
+ snd_power_change_state(dw->card, SNDRV_CTL_POWER_D0);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(snd_dw_hdmi_pm, snd_dw_hdmi_suspend,
+ snd_dw_hdmi_resume);
+#define PM_OPS &snd_dw_hdmi_pm
+#else
+#define PM_OPS NULL
+#endif
+
+static struct platform_driver snd_dw_hdmi_driver = {
+ .probe = snd_dw_hdmi_probe,
+ .remove = snd_dw_hdmi_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ .pm = PM_OPS,
+ },
+};
+
+module_platform_driver(snd_dw_hdmi_driver);
+
+MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");
+MODULE_DESCRIPTION("Synopsis Designware HDMI AHB ALSA interface");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
new file mode 100644
index 000000000..f72d27208
--- /dev/null
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-audio.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef DW_HDMI_AUDIO_H
+#define DW_HDMI_AUDIO_H
+
+struct dw_hdmi;
+
+struct dw_hdmi_audio_data {
+ phys_addr_t phys;
+ void __iomem *base;
+ int irq;
+ struct dw_hdmi *hdmi;
+ u8 *(*get_eld)(struct dw_hdmi *hdmi);
+};
+
+struct dw_hdmi_i2s_audio_data {
+ struct dw_hdmi *hdmi;
+
+ void (*write)(struct dw_hdmi *hdmi, u8 val, int offset);
+ u8 (*read)(struct dw_hdmi *hdmi, int offset);
+ u8 *(*get_eld)(struct dw_hdmi *hdmi);
+};
+
+#endif
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c
new file mode 100644
index 000000000..c8f44bcb2
--- /dev/null
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c
@@ -0,0 +1,321 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Designware HDMI CEC driver
+ *
+ * Copyright (C) 2015-2017 Russell King.
+ */
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+#include <drm/drm_edid.h>
+
+#include <media/cec.h>
+#include <media/cec-notifier.h>
+
+#include "dw-hdmi-cec.h"
+
+enum {
+ HDMI_IH_CEC_STAT0 = 0x0106,
+ HDMI_IH_MUTE_CEC_STAT0 = 0x0186,
+
+ HDMI_CEC_CTRL = 0x7d00,
+ CEC_CTRL_START = BIT(0),
+ CEC_CTRL_FRAME_TYP = 3 << 1,
+ CEC_CTRL_RETRY = 0 << 1,
+ CEC_CTRL_NORMAL = 1 << 1,
+ CEC_CTRL_IMMED = 2 << 1,
+
+ HDMI_CEC_STAT = 0x7d01,
+ CEC_STAT_DONE = BIT(0),
+ CEC_STAT_EOM = BIT(1),
+ CEC_STAT_NACK = BIT(2),
+ CEC_STAT_ARBLOST = BIT(3),
+ CEC_STAT_ERROR_INIT = BIT(4),
+ CEC_STAT_ERROR_FOLL = BIT(5),
+ CEC_STAT_WAKEUP = BIT(6),
+
+ HDMI_CEC_MASK = 0x7d02,
+ HDMI_CEC_POLARITY = 0x7d03,
+ HDMI_CEC_INT = 0x7d04,
+ HDMI_CEC_ADDR_L = 0x7d05,
+ HDMI_CEC_ADDR_H = 0x7d06,
+ HDMI_CEC_TX_CNT = 0x7d07,
+ HDMI_CEC_RX_CNT = 0x7d08,
+ HDMI_CEC_TX_DATA0 = 0x7d10,
+ HDMI_CEC_RX_DATA0 = 0x7d20,
+ HDMI_CEC_LOCK = 0x7d30,
+ HDMI_CEC_WKUPCTRL = 0x7d31,
+};
+
+struct dw_hdmi_cec {
+ struct dw_hdmi *hdmi;
+ const struct dw_hdmi_cec_ops *ops;
+ u32 addresses;
+ struct cec_adapter *adap;
+ struct cec_msg rx_msg;
+ unsigned int tx_status;
+ bool tx_done;
+ bool rx_done;
+ struct cec_notifier *notify;
+ int irq;
+};
+
+static void dw_hdmi_write(struct dw_hdmi_cec *cec, u8 val, int offset)
+{
+ cec->ops->write(cec->hdmi, val, offset);
+}
+
+static u8 dw_hdmi_read(struct dw_hdmi_cec *cec, int offset)
+{
+ return cec->ops->read(cec->hdmi, offset);
+}
+
+static int dw_hdmi_cec_log_addr(struct cec_adapter *adap, u8 logical_addr)
+{
+ struct dw_hdmi_cec *cec = cec_get_drvdata(adap);
+
+ if (logical_addr == CEC_LOG_ADDR_INVALID)
+ cec->addresses = 0;
+ else
+ cec->addresses |= BIT(logical_addr) | BIT(15);
+
+ dw_hdmi_write(cec, cec->addresses & 255, HDMI_CEC_ADDR_L);
+ dw_hdmi_write(cec, cec->addresses >> 8, HDMI_CEC_ADDR_H);
+
+ return 0;
+}
+
+static int dw_hdmi_cec_transmit(struct cec_adapter *adap, u8 attempts,
+ u32 signal_free_time, struct cec_msg *msg)
+{
+ struct dw_hdmi_cec *cec = cec_get_drvdata(adap);
+ unsigned int i, ctrl;
+
+ switch (signal_free_time) {
+ case CEC_SIGNAL_FREE_TIME_RETRY:
+ ctrl = CEC_CTRL_RETRY;
+ break;
+ case CEC_SIGNAL_FREE_TIME_NEW_INITIATOR:
+ default:
+ ctrl = CEC_CTRL_NORMAL;
+ break;
+ case CEC_SIGNAL_FREE_TIME_NEXT_XFER:
+ ctrl = CEC_CTRL_IMMED;
+ break;
+ }
+
+ for (i = 0; i < msg->len; i++)
+ dw_hdmi_write(cec, msg->msg[i], HDMI_CEC_TX_DATA0 + i);
+
+ dw_hdmi_write(cec, msg->len, HDMI_CEC_TX_CNT);
+ dw_hdmi_write(cec, ctrl | CEC_CTRL_START, HDMI_CEC_CTRL);
+
+ return 0;
+}
+
+static irqreturn_t dw_hdmi_cec_hardirq(int irq, void *data)
+{
+ struct cec_adapter *adap = data;
+ struct dw_hdmi_cec *cec = cec_get_drvdata(adap);
+ unsigned int stat = dw_hdmi_read(cec, HDMI_IH_CEC_STAT0);
+ irqreturn_t ret = IRQ_HANDLED;
+
+ if (stat == 0)
+ return IRQ_NONE;
+
+ dw_hdmi_write(cec, stat, HDMI_IH_CEC_STAT0);
+
+ if (stat & CEC_STAT_ERROR_INIT) {
+ cec->tx_status = CEC_TX_STATUS_ERROR;
+ cec->tx_done = true;
+ ret = IRQ_WAKE_THREAD;
+ } else if (stat & CEC_STAT_DONE) {
+ cec->tx_status = CEC_TX_STATUS_OK;
+ cec->tx_done = true;
+ ret = IRQ_WAKE_THREAD;
+ } else if (stat & CEC_STAT_NACK) {
+ cec->tx_status = CEC_TX_STATUS_NACK;
+ cec->tx_done = true;
+ ret = IRQ_WAKE_THREAD;
+ }
+
+ if (stat & CEC_STAT_EOM) {
+ unsigned int len, i;
+
+ len = dw_hdmi_read(cec, HDMI_CEC_RX_CNT);
+ if (len > sizeof(cec->rx_msg.msg))
+ len = sizeof(cec->rx_msg.msg);
+
+ for (i = 0; i < len; i++)
+ cec->rx_msg.msg[i] =
+ dw_hdmi_read(cec, HDMI_CEC_RX_DATA0 + i);
+
+ dw_hdmi_write(cec, 0, HDMI_CEC_LOCK);
+
+ cec->rx_msg.len = len;
+ smp_wmb();
+ cec->rx_done = true;
+
+ ret = IRQ_WAKE_THREAD;
+ }
+
+ return ret;
+}
+
+static irqreturn_t dw_hdmi_cec_thread(int irq, void *data)
+{
+ struct cec_adapter *adap = data;
+ struct dw_hdmi_cec *cec = cec_get_drvdata(adap);
+
+ if (cec->tx_done) {
+ cec->tx_done = false;
+ cec_transmit_attempt_done(adap, cec->tx_status);
+ }
+ if (cec->rx_done) {
+ cec->rx_done = false;
+ smp_rmb();
+ cec_received_msg(adap, &cec->rx_msg);
+ }
+ return IRQ_HANDLED;
+}
+
+static int dw_hdmi_cec_enable(struct cec_adapter *adap, bool enable)
+{
+ struct dw_hdmi_cec *cec = cec_get_drvdata(adap);
+
+ if (!enable) {
+ dw_hdmi_write(cec, ~0, HDMI_CEC_MASK);
+ dw_hdmi_write(cec, ~0, HDMI_IH_MUTE_CEC_STAT0);
+ dw_hdmi_write(cec, 0, HDMI_CEC_POLARITY);
+
+ cec->ops->disable(cec->hdmi);
+ } else {
+ unsigned int irqs;
+
+ dw_hdmi_write(cec, 0, HDMI_CEC_CTRL);
+ dw_hdmi_write(cec, ~0, HDMI_IH_CEC_STAT0);
+ dw_hdmi_write(cec, 0, HDMI_CEC_LOCK);
+
+ dw_hdmi_cec_log_addr(cec->adap, CEC_LOG_ADDR_INVALID);
+
+ cec->ops->enable(cec->hdmi);
+
+ irqs = CEC_STAT_ERROR_INIT | CEC_STAT_NACK | CEC_STAT_EOM |
+ CEC_STAT_DONE;
+ dw_hdmi_write(cec, irqs, HDMI_CEC_POLARITY);
+ dw_hdmi_write(cec, ~irqs, HDMI_CEC_MASK);
+ dw_hdmi_write(cec, ~irqs, HDMI_IH_MUTE_CEC_STAT0);
+ }
+ return 0;
+}
+
+static const struct cec_adap_ops dw_hdmi_cec_ops = {
+ .adap_enable = dw_hdmi_cec_enable,
+ .adap_log_addr = dw_hdmi_cec_log_addr,
+ .adap_transmit = dw_hdmi_cec_transmit,
+};
+
+static void dw_hdmi_cec_del(void *data)
+{
+ struct dw_hdmi_cec *cec = data;
+
+ cec_delete_adapter(cec->adap);
+}
+
+static int dw_hdmi_cec_probe(struct platform_device *pdev)
+{
+ struct dw_hdmi_cec_data *data = dev_get_platdata(&pdev->dev);
+ struct dw_hdmi_cec *cec;
+ int ret;
+
+ if (!data)
+ return -ENXIO;
+
+ /*
+ * Our device is just a convenience - we want to link to the real
+ * hardware device here, so that userspace can see the association
+ * between the HDMI hardware and its associated CEC chardev.
+ */
+ cec = devm_kzalloc(&pdev->dev, sizeof(*cec), GFP_KERNEL);
+ if (!cec)
+ return -ENOMEM;
+
+ cec->irq = data->irq;
+ cec->ops = data->ops;
+ cec->hdmi = data->hdmi;
+
+ platform_set_drvdata(pdev, cec);
+
+ dw_hdmi_write(cec, 0, HDMI_CEC_TX_CNT);
+ dw_hdmi_write(cec, ~0, HDMI_CEC_MASK);
+ dw_hdmi_write(cec, ~0, HDMI_IH_MUTE_CEC_STAT0);
+ dw_hdmi_write(cec, 0, HDMI_CEC_POLARITY);
+
+ cec->adap = cec_allocate_adapter(&dw_hdmi_cec_ops, cec, "dw_hdmi",
+ CEC_CAP_DEFAULTS |
+ CEC_CAP_CONNECTOR_INFO,
+ CEC_MAX_LOG_ADDRS);
+ if (IS_ERR(cec->adap))
+ return PTR_ERR(cec->adap);
+
+ /* override the module pointer */
+ cec->adap->owner = THIS_MODULE;
+
+ ret = devm_add_action_or_reset(&pdev->dev, dw_hdmi_cec_del, cec);
+ if (ret)
+ return ret;
+
+ ret = devm_request_threaded_irq(&pdev->dev, cec->irq,
+ dw_hdmi_cec_hardirq,
+ dw_hdmi_cec_thread, IRQF_SHARED,
+ "dw-hdmi-cec", cec->adap);
+ if (ret < 0)
+ return ret;
+
+ cec->notify = cec_notifier_cec_adap_register(pdev->dev.parent,
+ NULL, cec->adap);
+ if (!cec->notify)
+ return -ENOMEM;
+
+ ret = cec_register_adapter(cec->adap, pdev->dev.parent);
+ if (ret < 0) {
+ cec_notifier_cec_adap_unregister(cec->notify, cec->adap);
+ return ret;
+ }
+
+ /*
+ * CEC documentation says we must not call cec_delete_adapter
+ * after a successful call to cec_register_adapter().
+ */
+ devm_remove_action(&pdev->dev, dw_hdmi_cec_del, cec);
+
+ return 0;
+}
+
+static int dw_hdmi_cec_remove(struct platform_device *pdev)
+{
+ struct dw_hdmi_cec *cec = platform_get_drvdata(pdev);
+
+ cec_notifier_cec_adap_unregister(cec->notify, cec->adap);
+ cec_unregister_adapter(cec->adap);
+
+ return 0;
+}
+
+static struct platform_driver dw_hdmi_cec_driver = {
+ .probe = dw_hdmi_cec_probe,
+ .remove = dw_hdmi_cec_remove,
+ .driver = {
+ .name = "dw-hdmi-cec",
+ },
+};
+module_platform_driver(dw_hdmi_cec_driver);
+
+MODULE_AUTHOR("Russell King <rmk+kernel@armlinux.org.uk>");
+MODULE_DESCRIPTION("Synopsys Designware HDMI CEC driver for i.MX");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS(PLATFORM_MODULE_PREFIX "dw-hdmi-cec");
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.h b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.h
new file mode 100644
index 000000000..cf4dc121a
--- /dev/null
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.h
@@ -0,0 +1,19 @@
+#ifndef DW_HDMI_CEC_H
+#define DW_HDMI_CEC_H
+
+struct dw_hdmi;
+
+struct dw_hdmi_cec_ops {
+ void (*write)(struct dw_hdmi *hdmi, u8 val, int offset);
+ u8 (*read)(struct dw_hdmi *hdmi, int offset);
+ void (*enable)(struct dw_hdmi *hdmi);
+ void (*disable)(struct dw_hdmi *hdmi);
+};
+
+struct dw_hdmi_cec_data {
+ struct dw_hdmi *hdmi;
+ const struct dw_hdmi_cec_ops *ops;
+ int irq;
+};
+
+#endif
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-gp-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-gp-audio.c
new file mode 100644
index 000000000..557966239
--- /dev/null
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-gp-audio.c
@@ -0,0 +1,197 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * dw-hdmi-gp-audio.c
+ *
+ * Copyright 2020-2022 NXP
+ */
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
+#include <drm/bridge/dw_hdmi.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_connector.h>
+
+#include <sound/hdmi-codec.h>
+#include <sound/asoundef.h>
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_drm_eld.h>
+#include <sound/pcm_iec958.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "dw-hdmi-audio.h"
+
+#define DRIVER_NAME "dw-hdmi-gp-audio"
+#define DRV_NAME "hdmi-gp-audio"
+
+struct snd_dw_hdmi {
+ struct dw_hdmi_audio_data data;
+ struct platform_device *audio_pdev;
+ unsigned int pos;
+};
+
+struct dw_hdmi_channel_conf {
+ u8 conf1;
+ u8 ca;
+};
+
+/*
+ * The default mapping of ALSA channels to HDMI channels and speaker
+ * allocation bits. Note that we can't do channel remapping here -
+ * channels must be in the same order.
+ *
+ * Mappings for alsa-lib pcm/surround*.conf files:
+ *
+ * Front Sur4.0 Sur4.1 Sur5.0 Sur5.1 Sur7.1
+ * Channels 2 4 6 6 6 8
+ *
+ * Our mapping from ALSA channel to CEA686D speaker name and HDMI channel:
+ *
+ * Number of ALSA channels
+ * ALSA Channel 2 3 4 5 6 7 8
+ * 0 FL:0 = = = = = =
+ * 1 FR:1 = = = = = =
+ * 2 FC:3 RL:4 LFE:2 = = =
+ * 3 RR:5 RL:4 FC:3 = =
+ * 4 RR:5 RL:4 = =
+ * 5 RR:5 = =
+ * 6 RC:6 =
+ * 7 RLC/FRC RLC/FRC
+ */
+static struct dw_hdmi_channel_conf default_hdmi_channel_config[7] = {
+ { 0x03, 0x00 }, /* FL,FR */
+ { 0x0b, 0x02 }, /* FL,FR,FC */
+ { 0x33, 0x08 }, /* FL,FR,RL,RR */
+ { 0x37, 0x09 }, /* FL,FR,LFE,RL,RR */
+ { 0x3f, 0x0b }, /* FL,FR,LFE,FC,RL,RR */
+ { 0x7f, 0x0f }, /* FL,FR,LFE,FC,RL,RR,RC */
+ { 0xff, 0x13 }, /* FL,FR,LFE,FC,RL,RR,[FR]RC,[FR]LC */
+};
+
+static int audio_hw_params(struct device *dev, void *data,
+ struct hdmi_codec_daifmt *daifmt,
+ struct hdmi_codec_params *params)
+{
+ struct snd_dw_hdmi *dw = dev_get_drvdata(dev);
+ u8 ca;
+
+ dw_hdmi_set_sample_rate(dw->data.hdmi, params->sample_rate);
+
+ ca = default_hdmi_channel_config[params->channels - 2].ca;
+
+ dw_hdmi_set_channel_count(dw->data.hdmi, params->channels);
+ dw_hdmi_set_channel_allocation(dw->data.hdmi, ca);
+
+ dw_hdmi_set_sample_non_pcm(dw->data.hdmi,
+ params->iec.status[0] & IEC958_AES0_NONAUDIO);
+ dw_hdmi_set_sample_width(dw->data.hdmi, params->sample_width);
+
+ return 0;
+}
+
+static void audio_shutdown(struct device *dev, void *data)
+{
+}
+
+static int audio_mute_stream(struct device *dev, void *data,
+ bool enable, int direction)
+{
+ struct snd_dw_hdmi *dw = dev_get_drvdata(dev);
+
+ if (!enable)
+ dw_hdmi_audio_enable(dw->data.hdmi);
+ else
+ dw_hdmi_audio_disable(dw->data.hdmi);
+
+ return 0;
+}
+
+static int audio_get_eld(struct device *dev, void *data,
+ u8 *buf, size_t len)
+{
+ struct dw_hdmi_audio_data *audio = data;
+ u8 *eld;
+
+ eld = audio->get_eld(audio->hdmi);
+ if (eld)
+ memcpy(buf, eld, min_t(size_t, MAX_ELD_BYTES, len));
+ else
+ /* Pass en empty ELD if connector not available */
+ memset(buf, 0, len);
+
+ return 0;
+}
+
+static int audio_hook_plugged_cb(struct device *dev, void *data,
+ hdmi_codec_plugged_cb fn,
+ struct device *codec_dev)
+{
+ struct snd_dw_hdmi *dw = dev_get_drvdata(dev);
+
+ return dw_hdmi_set_plugged_cb(dw->data.hdmi, fn, codec_dev);
+}
+
+static const struct hdmi_codec_ops audio_codec_ops = {
+ .hw_params = audio_hw_params,
+ .audio_shutdown = audio_shutdown,
+ .mute_stream = audio_mute_stream,
+ .get_eld = audio_get_eld,
+ .hook_plugged_cb = audio_hook_plugged_cb,
+};
+
+static int snd_dw_hdmi_probe(struct platform_device *pdev)
+{
+ struct dw_hdmi_audio_data *data = pdev->dev.platform_data;
+ struct snd_dw_hdmi *dw;
+
+ const struct hdmi_codec_pdata codec_data = {
+ .i2s = 1,
+ .spdif = 0,
+ .ops = &audio_codec_ops,
+ .max_i2s_channels = 8,
+ .data = data,
+ };
+
+ dw = devm_kzalloc(&pdev->dev, sizeof(*dw), GFP_KERNEL);
+ if (!dw)
+ return -ENOMEM;
+
+ dw->data = *data;
+
+ platform_set_drvdata(pdev, dw);
+
+ dw->audio_pdev = platform_device_register_data(&pdev->dev,
+ HDMI_CODEC_DRV_NAME, 1,
+ &codec_data,
+ sizeof(codec_data));
+
+ return PTR_ERR_OR_ZERO(dw->audio_pdev);
+}
+
+static int snd_dw_hdmi_remove(struct platform_device *pdev)
+{
+ struct snd_dw_hdmi *dw = platform_get_drvdata(pdev);
+
+ platform_device_unregister(dw->audio_pdev);
+
+ return 0;
+}
+
+static struct platform_driver snd_dw_hdmi_driver = {
+ .probe = snd_dw_hdmi_probe,
+ .remove = snd_dw_hdmi_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+};
+
+module_platform_driver(snd_dw_hdmi_driver);
+
+MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
+MODULE_DESCRIPTION("Synopsys Designware HDMI GPA ALSA interface");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
new file mode 100644
index 000000000..a2f0860b2
--- /dev/null
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
@@ -0,0 +1,239 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * dw-hdmi-i2s-audio.c
+ *
+ * Copyright (c) 2017 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+
+#include <drm/bridge/dw_hdmi.h>
+#include <drm/drm_crtc.h>
+
+#include <sound/hdmi-codec.h>
+
+#include "dw-hdmi.h"
+#include "dw-hdmi-audio.h"
+
+#define DRIVER_NAME "dw-hdmi-i2s-audio"
+
+static inline void hdmi_write(struct dw_hdmi_i2s_audio_data *audio,
+ u8 val, int offset)
+{
+ struct dw_hdmi *hdmi = audio->hdmi;
+
+ audio->write(hdmi, val, offset);
+}
+
+static inline u8 hdmi_read(struct dw_hdmi_i2s_audio_data *audio, int offset)
+{
+ struct dw_hdmi *hdmi = audio->hdmi;
+
+ return audio->read(hdmi, offset);
+}
+
+static int dw_hdmi_i2s_hw_params(struct device *dev, void *data,
+ struct hdmi_codec_daifmt *fmt,
+ struct hdmi_codec_params *hparms)
+{
+ struct dw_hdmi_i2s_audio_data *audio = data;
+ struct dw_hdmi *hdmi = audio->hdmi;
+ u8 conf0 = 0;
+ u8 conf1 = 0;
+ u8 inputclkfs = 0;
+
+ /* it cares I2S only */
+ if (fmt->bit_clk_provider | fmt->frame_clk_provider) {
+ dev_err(dev, "unsupported clock settings\n");
+ return -EINVAL;
+ }
+
+ /* Reset the FIFOs before applying new params */
+ hdmi_write(audio, HDMI_AUD_CONF0_SW_RESET, HDMI_AUD_CONF0);
+ hdmi_write(audio, (u8)~HDMI_MC_SWRSTZ_I2SSWRST_REQ, HDMI_MC_SWRSTZ);
+
+ inputclkfs = HDMI_AUD_INPUTCLKFS_64FS;
+ conf0 = (HDMI_AUD_CONF0_I2S_SELECT | HDMI_AUD_CONF0_I2S_EN0);
+
+ /* Enable the required i2s lanes */
+ switch (hparms->channels) {
+ case 7 ... 8:
+ conf0 |= HDMI_AUD_CONF0_I2S_EN3;
+ fallthrough;
+ case 5 ... 6:
+ conf0 |= HDMI_AUD_CONF0_I2S_EN2;
+ fallthrough;
+ case 3 ... 4:
+ conf0 |= HDMI_AUD_CONF0_I2S_EN1;
+ /* Fall-thru */
+ }
+
+ switch (hparms->sample_width) {
+ case 16:
+ conf1 = HDMI_AUD_CONF1_WIDTH_16;
+ break;
+ case 24:
+ case 32:
+ conf1 = HDMI_AUD_CONF1_WIDTH_24;
+ break;
+ }
+
+ switch (fmt->fmt) {
+ case HDMI_I2S:
+ conf1 |= HDMI_AUD_CONF1_MODE_I2S;
+ break;
+ case HDMI_RIGHT_J:
+ conf1 |= HDMI_AUD_CONF1_MODE_RIGHT_J;
+ break;
+ case HDMI_LEFT_J:
+ conf1 |= HDMI_AUD_CONF1_MODE_LEFT_J;
+ break;
+ case HDMI_DSP_A:
+ conf1 |= HDMI_AUD_CONF1_MODE_BURST_1;
+ break;
+ case HDMI_DSP_B:
+ conf1 |= HDMI_AUD_CONF1_MODE_BURST_2;
+ break;
+ default:
+ dev_err(dev, "unsupported format\n");
+ return -EINVAL;
+ }
+
+ dw_hdmi_set_sample_rate(hdmi, hparms->sample_rate);
+ dw_hdmi_set_channel_status(hdmi, hparms->iec.status);
+ dw_hdmi_set_channel_count(hdmi, hparms->channels);
+ dw_hdmi_set_channel_allocation(hdmi, hparms->cea.channel_allocation);
+
+ hdmi_write(audio, inputclkfs, HDMI_AUD_INPUTCLKFS);
+ hdmi_write(audio, conf0, HDMI_AUD_CONF0);
+ hdmi_write(audio, conf1, HDMI_AUD_CONF1);
+
+ return 0;
+}
+
+static int dw_hdmi_i2s_audio_startup(struct device *dev, void *data)
+{
+ struct dw_hdmi_i2s_audio_data *audio = data;
+ struct dw_hdmi *hdmi = audio->hdmi;
+
+ dw_hdmi_audio_enable(hdmi);
+
+ return 0;
+}
+
+static void dw_hdmi_i2s_audio_shutdown(struct device *dev, void *data)
+{
+ struct dw_hdmi_i2s_audio_data *audio = data;
+ struct dw_hdmi *hdmi = audio->hdmi;
+
+ dw_hdmi_audio_disable(hdmi);
+}
+
+static int dw_hdmi_i2s_get_eld(struct device *dev, void *data, uint8_t *buf,
+ size_t len)
+{
+ struct dw_hdmi_i2s_audio_data *audio = data;
+ u8 *eld;
+
+ eld = audio->get_eld(audio->hdmi);
+ if (eld)
+ memcpy(buf, eld, min_t(size_t, MAX_ELD_BYTES, len));
+ else
+ /* Pass en empty ELD if connector not available */
+ memset(buf, 0, len);
+
+ return 0;
+}
+
+static int dw_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
+ struct device_node *endpoint)
+{
+ struct of_endpoint of_ep;
+ int ret;
+
+ ret = of_graph_parse_endpoint(endpoint, &of_ep);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * HDMI sound should be located as reg = <2>
+ * Then, it is sound port 0
+ */
+ if (of_ep.port == 2)
+ return 0;
+
+ return -EINVAL;
+}
+
+static int dw_hdmi_i2s_hook_plugged_cb(struct device *dev, void *data,
+ hdmi_codec_plugged_cb fn,
+ struct device *codec_dev)
+{
+ struct dw_hdmi_i2s_audio_data *audio = data;
+ struct dw_hdmi *hdmi = audio->hdmi;
+
+ return dw_hdmi_set_plugged_cb(hdmi, fn, codec_dev);
+}
+
+static const struct hdmi_codec_ops dw_hdmi_i2s_ops = {
+ .hw_params = dw_hdmi_i2s_hw_params,
+ .audio_startup = dw_hdmi_i2s_audio_startup,
+ .audio_shutdown = dw_hdmi_i2s_audio_shutdown,
+ .get_eld = dw_hdmi_i2s_get_eld,
+ .get_dai_id = dw_hdmi_i2s_get_dai_id,
+ .hook_plugged_cb = dw_hdmi_i2s_hook_plugged_cb,
+};
+
+static int snd_dw_hdmi_probe(struct platform_device *pdev)
+{
+ struct dw_hdmi_i2s_audio_data *audio = pdev->dev.platform_data;
+ struct platform_device_info pdevinfo;
+ struct hdmi_codec_pdata pdata;
+ struct platform_device *platform;
+
+ pdata.ops = &dw_hdmi_i2s_ops;
+ pdata.i2s = 1;
+ pdata.max_i2s_channels = 8;
+ pdata.data = audio;
+
+ memset(&pdevinfo, 0, sizeof(pdevinfo));
+ pdevinfo.parent = pdev->dev.parent;
+ pdevinfo.id = PLATFORM_DEVID_AUTO;
+ pdevinfo.name = HDMI_CODEC_DRV_NAME;
+ pdevinfo.data = &pdata;
+ pdevinfo.size_data = sizeof(pdata);
+ pdevinfo.dma_mask = DMA_BIT_MASK(32);
+
+ platform = platform_device_register_full(&pdevinfo);
+ if (IS_ERR(platform))
+ return PTR_ERR(platform);
+
+ dev_set_drvdata(&pdev->dev, platform);
+
+ return 0;
+}
+
+static int snd_dw_hdmi_remove(struct platform_device *pdev)
+{
+ struct platform_device *platform = dev_get_drvdata(&pdev->dev);
+
+ platform_device_unregister(platform);
+
+ return 0;
+}
+
+static struct platform_driver snd_dw_hdmi_driver = {
+ .probe = snd_dw_hdmi_probe,
+ .remove = snd_dw_hdmi_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+};
+module_platform_driver(snd_dw_hdmi_driver);
+
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
+MODULE_DESCRIPTION("Synopsis Designware HDMI I2S ALSA SoC interface");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
new file mode 100644
index 000000000..aa51c61a7
--- /dev/null
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -0,0 +1,3712 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DesignWare High-Definition Multimedia Interface (HDMI) driver
+ *
+ * Copyright (C) 2013-2015 Mentor Graphics Inc.
+ * Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
+ * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ */
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/hdmi.h>
+#include <linux/i2c.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_device.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/regmap.h>
+#include <linux/dma-mapping.h>
+#include <linux/spinlock.h>
+
+#include <media/cec-notifier.h>
+
+#include <uapi/linux/media-bus-format.h>
+#include <uapi/linux/videodev2.h>
+
+#include <drm/bridge/dw_hdmi.h>
+#include <drm/display/drm_hdmi_helper.h>
+#include <drm/display/drm_scdc_helper.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_of.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#include "dw-hdmi-audio.h"
+#include "dw-hdmi-cec.h"
+#include "dw-hdmi.h"
+
+#define DDC_CI_ADDR 0x37
+#define DDC_SEGMENT_ADDR 0x30
+
+#define HDMI_EDID_LEN 512
+
+/* DW-HDMI Controller >= 0x200a are at least compliant with SCDC version 1 */
+#define SCDC_MIN_SOURCE_VERSION 0x1
+
+#define HDMI14_MAX_TMDSCLK 340000000
+
+enum hdmi_datamap {
+ RGB444_8B = 0x01,
+ RGB444_10B = 0x03,
+ RGB444_12B = 0x05,
+ RGB444_16B = 0x07,
+ YCbCr444_8B = 0x09,
+ YCbCr444_10B = 0x0B,
+ YCbCr444_12B = 0x0D,
+ YCbCr444_16B = 0x0F,
+ YCbCr422_8B = 0x16,
+ YCbCr422_10B = 0x14,
+ YCbCr422_12B = 0x12,
+};
+
+static const u16 csc_coeff_default[3][4] = {
+ { 0x2000, 0x0000, 0x0000, 0x0000 },
+ { 0x0000, 0x2000, 0x0000, 0x0000 },
+ { 0x0000, 0x0000, 0x2000, 0x0000 }
+};
+
+static const u16 csc_coeff_rgb_out_eitu601[3][4] = {
+ { 0x2000, 0x6926, 0x74fd, 0x010e },
+ { 0x2000, 0x2cdd, 0x0000, 0x7e9a },
+ { 0x2000, 0x0000, 0x38b4, 0x7e3b }
+};
+
+static const u16 csc_coeff_rgb_out_eitu709[3][4] = {
+ { 0x2000, 0x7106, 0x7a02, 0x00a7 },
+ { 0x2000, 0x3264, 0x0000, 0x7e6d },
+ { 0x2000, 0x0000, 0x3b61, 0x7e25 }
+};
+
+static const u16 csc_coeff_rgb_in_eitu601[3][4] = {
+ { 0x2591, 0x1322, 0x074b, 0x0000 },
+ { 0x6535, 0x2000, 0x7acc, 0x0200 },
+ { 0x6acd, 0x7534, 0x2000, 0x0200 }
+};
+
+static const u16 csc_coeff_rgb_in_eitu709[3][4] = {
+ { 0x2dc5, 0x0d9b, 0x049e, 0x0000 },
+ { 0x62f0, 0x2000, 0x7d11, 0x0200 },
+ { 0x6756, 0x78ab, 0x2000, 0x0200 }
+};
+
+static const u16 csc_coeff_rgb_full_to_rgb_limited[3][4] = {
+ { 0x1b7c, 0x0000, 0x0000, 0x0020 },
+ { 0x0000, 0x1b7c, 0x0000, 0x0020 },
+ { 0x0000, 0x0000, 0x1b7c, 0x0020 }
+};
+
+struct hdmi_vmode {
+ bool mdataenablepolarity;
+
+ unsigned int mpixelclock;
+ unsigned int mpixelrepetitioninput;
+ unsigned int mpixelrepetitionoutput;
+ unsigned int mtmdsclock;
+};
+
+struct hdmi_data_info {
+ unsigned int enc_in_bus_format;
+ unsigned int enc_out_bus_format;
+ unsigned int enc_in_encoding;
+ unsigned int enc_out_encoding;
+ unsigned int pix_repet_factor;
+ unsigned int hdcp_enable;
+ struct hdmi_vmode video_mode;
+ bool rgb_limited_range;
+};
+
+struct dw_hdmi_i2c {
+ struct i2c_adapter adap;
+
+ struct mutex lock; /* used to serialize data transfers */
+ struct completion cmp;
+ u8 stat;
+
+ u8 slave_reg;
+ bool is_regaddr;
+ bool is_segment;
+};
+
+struct dw_hdmi_phy_data {
+ enum dw_hdmi_phy_type type;
+ const char *name;
+ unsigned int gen;
+ bool has_svsret;
+ int (*configure)(struct dw_hdmi *hdmi,
+ const struct dw_hdmi_plat_data *pdata,
+ unsigned long mpixelclock);
+};
+
+struct dw_hdmi {
+ struct drm_connector connector;
+ struct drm_bridge bridge;
+ struct drm_bridge *next_bridge;
+
+ unsigned int version;
+
+ struct platform_device *audio;
+ struct platform_device *cec;
+ struct device *dev;
+ struct clk *isfr_clk;
+ struct clk *iahb_clk;
+ struct clk *cec_clk;
+ struct dw_hdmi_i2c *i2c;
+
+ struct hdmi_data_info hdmi_data;
+ const struct dw_hdmi_plat_data *plat_data;
+
+ int vic;
+
+ u8 edid[HDMI_EDID_LEN];
+
+ struct {
+ const struct dw_hdmi_phy_ops *ops;
+ const char *name;
+ void *data;
+ bool enabled;
+ } phy;
+
+ struct drm_display_mode previous_mode;
+
+ struct i2c_adapter *ddc;
+ void __iomem *regs;
+ bool sink_is_hdmi;
+ bool sink_has_audio;
+
+ struct pinctrl *pinctrl;
+ struct pinctrl_state *default_state;
+ struct pinctrl_state *unwedge_state;
+
+ struct mutex mutex; /* for state below and previous_mode */
+ enum drm_connector_force force; /* mutex-protected force state */
+ struct drm_connector *curr_conn;/* current connector (only valid when !disabled) */
+ bool disabled; /* DRM has disabled our bridge */
+ bool bridge_is_on; /* indicates the bridge is on */
+ bool rxsense; /* rxsense state */
+ u8 phy_mask; /* desired phy int mask settings */
+ u8 mc_clkdis; /* clock disable register */
+
+ spinlock_t audio_lock;
+ struct mutex audio_mutex;
+ unsigned int sample_non_pcm;
+ unsigned int sample_width;
+ unsigned int sample_rate;
+ unsigned int channels;
+ unsigned int audio_cts;
+ unsigned int audio_n;
+ bool audio_enable;
+
+ unsigned int reg_shift;
+ struct regmap *regm;
+ void (*enable_audio)(struct dw_hdmi *hdmi);
+ void (*disable_audio)(struct dw_hdmi *hdmi);
+
+ struct mutex cec_notifier_mutex;
+ struct cec_notifier *cec_notifier;
+
+ hdmi_codec_plugged_cb plugged_cb;
+ struct device *codec_dev;
+ enum drm_connector_status last_connector_result;
+};
+
+#define HDMI_IH_PHY_STAT0_RX_SENSE \
+ (HDMI_IH_PHY_STAT0_RX_SENSE0 | HDMI_IH_PHY_STAT0_RX_SENSE1 | \
+ HDMI_IH_PHY_STAT0_RX_SENSE2 | HDMI_IH_PHY_STAT0_RX_SENSE3)
+
+#define HDMI_PHY_RX_SENSE \
+ (HDMI_PHY_RX_SENSE0 | HDMI_PHY_RX_SENSE1 | \
+ HDMI_PHY_RX_SENSE2 | HDMI_PHY_RX_SENSE3)
+
+static inline void hdmi_writeb(struct dw_hdmi *hdmi, u8 val, int offset)
+{
+ regmap_write(hdmi->regm, offset << hdmi->reg_shift, val);
+}
+
+static inline u8 hdmi_readb(struct dw_hdmi *hdmi, int offset)
+{
+ unsigned int val = 0;
+
+ regmap_read(hdmi->regm, offset << hdmi->reg_shift, &val);
+
+ return val;
+}
+
+static void handle_plugged_change(struct dw_hdmi *hdmi, bool plugged)
+{
+ if (hdmi->plugged_cb && hdmi->codec_dev)
+ hdmi->plugged_cb(hdmi->codec_dev, plugged);
+}
+
+int dw_hdmi_set_plugged_cb(struct dw_hdmi *hdmi, hdmi_codec_plugged_cb fn,
+ struct device *codec_dev)
+{
+ bool plugged;
+
+ mutex_lock(&hdmi->mutex);
+ hdmi->plugged_cb = fn;
+ hdmi->codec_dev = codec_dev;
+ plugged = hdmi->last_connector_result == connector_status_connected;
+ handle_plugged_change(hdmi, plugged);
+ mutex_unlock(&hdmi->mutex);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_set_plugged_cb);
+
+static void hdmi_modb(struct dw_hdmi *hdmi, u8 data, u8 mask, unsigned reg)
+{
+ regmap_update_bits(hdmi->regm, reg << hdmi->reg_shift, mask, data);
+}
+
+static void hdmi_mask_writeb(struct dw_hdmi *hdmi, u8 data, unsigned int reg,
+ u8 shift, u8 mask)
+{
+ hdmi_modb(hdmi, data << shift, mask, reg);
+}
+
+static void dw_hdmi_i2c_init(struct dw_hdmi *hdmi)
+{
+ hdmi_writeb(hdmi, HDMI_PHY_I2CM_INT_ADDR_DONE_POL,
+ HDMI_PHY_I2CM_INT_ADDR);
+
+ hdmi_writeb(hdmi, HDMI_PHY_I2CM_CTLINT_ADDR_NAC_POL |
+ HDMI_PHY_I2CM_CTLINT_ADDR_ARBITRATION_POL,
+ HDMI_PHY_I2CM_CTLINT_ADDR);
+
+ /* Software reset */
+ hdmi_writeb(hdmi, 0x00, HDMI_I2CM_SOFTRSTZ);
+
+ /* Set Standard Mode speed (determined to be 100KHz on iMX6) */
+ hdmi_writeb(hdmi, 0x00, HDMI_I2CM_DIV);
+
+ /* Set done, not acknowledged and arbitration interrupt polarities */
+ hdmi_writeb(hdmi, HDMI_I2CM_INT_DONE_POL, HDMI_I2CM_INT);
+ hdmi_writeb(hdmi, HDMI_I2CM_CTLINT_NAC_POL | HDMI_I2CM_CTLINT_ARB_POL,
+ HDMI_I2CM_CTLINT);
+
+ /* Clear DONE and ERROR interrupts */
+ hdmi_writeb(hdmi, HDMI_IH_I2CM_STAT0_ERROR | HDMI_IH_I2CM_STAT0_DONE,
+ HDMI_IH_I2CM_STAT0);
+
+ /* Mute DONE and ERROR interrupts */
+ hdmi_writeb(hdmi, HDMI_IH_I2CM_STAT0_ERROR | HDMI_IH_I2CM_STAT0_DONE,
+ HDMI_IH_MUTE_I2CM_STAT0);
+}
+
+static bool dw_hdmi_i2c_unwedge(struct dw_hdmi *hdmi)
+{
+ /* If no unwedge state then give up */
+ if (!hdmi->unwedge_state)
+ return false;
+
+ dev_info(hdmi->dev, "Attempting to unwedge stuck i2c bus\n");
+
+ /*
+ * This is a huge hack to workaround a problem where the dw_hdmi i2c
+ * bus could sometimes get wedged. Once wedged there doesn't appear
+ * to be any way to unwedge it (including the HDMI_I2CM_SOFTRSTZ)
+ * other than pulsing the SDA line.
+ *
+ * We appear to be able to pulse the SDA line (in the eyes of dw_hdmi)
+ * by:
+ * 1. Remux the pin as a GPIO output, driven low.
+ * 2. Wait a little while. 1 ms seems to work, but we'll do 10.
+ * 3. Immediately jump to remux the pin as dw_hdmi i2c again.
+ *
+ * At the moment of remuxing, the line will still be low due to its
+ * recent stint as an output, but then it will be pulled high by the
+ * (presumed) external pullup. dw_hdmi seems to see this as a rising
+ * edge and that seems to get it out of its jam.
+ *
+ * This wedging was only ever seen on one TV, and only on one of
+ * its HDMI ports. It happened when the TV was powered on while the
+ * device was plugged in. A scope trace shows the TV bringing both SDA
+ * and SCL low, then bringing them both back up at roughly the same
+ * time. Presumably this confuses dw_hdmi because it saw activity but
+ * no real STOP (maybe it thinks there's another master on the bus?).
+ * Giving it a clean rising edge of SDA while SCL is already high
+ * presumably makes dw_hdmi see a STOP which seems to bring dw_hdmi out
+ * of its stupor.
+ *
+ * Note that after coming back alive, transfers seem to immediately
+ * resume, so if we unwedge due to a timeout we should wait a little
+ * longer for our transfer to finish, since it might have just started
+ * now.
+ */
+ pinctrl_select_state(hdmi->pinctrl, hdmi->unwedge_state);
+ msleep(10);
+ pinctrl_select_state(hdmi->pinctrl, hdmi->default_state);
+
+ return true;
+}
+
+static int dw_hdmi_i2c_wait(struct dw_hdmi *hdmi)
+{
+ struct dw_hdmi_i2c *i2c = hdmi->i2c;
+ int stat;
+
+ stat = wait_for_completion_timeout(&i2c->cmp, HZ / 10);
+ if (!stat) {
+ /* If we can't unwedge, return timeout */
+ if (!dw_hdmi_i2c_unwedge(hdmi))
+ return -EAGAIN;
+
+ /* We tried to unwedge; give it another chance */
+ stat = wait_for_completion_timeout(&i2c->cmp, HZ / 10);
+ if (!stat)
+ return -EAGAIN;
+ }
+
+ /* Check for error condition on the bus */
+ if (i2c->stat & HDMI_IH_I2CM_STAT0_ERROR)
+ return -EIO;
+
+ return 0;
+}
+
+static int dw_hdmi_i2c_read(struct dw_hdmi *hdmi,
+ unsigned char *buf, unsigned int length)
+{
+ struct dw_hdmi_i2c *i2c = hdmi->i2c;
+ int ret;
+
+ if (!i2c->is_regaddr) {
+ dev_dbg(hdmi->dev, "set read register address to 0\n");
+ i2c->slave_reg = 0x00;
+ i2c->is_regaddr = true;
+ }
+
+ while (length--) {
+ reinit_completion(&i2c->cmp);
+
+ hdmi_writeb(hdmi, i2c->slave_reg++, HDMI_I2CM_ADDRESS);
+ if (i2c->is_segment)
+ hdmi_writeb(hdmi, HDMI_I2CM_OPERATION_READ_EXT,
+ HDMI_I2CM_OPERATION);
+ else
+ hdmi_writeb(hdmi, HDMI_I2CM_OPERATION_READ,
+ HDMI_I2CM_OPERATION);
+
+ ret = dw_hdmi_i2c_wait(hdmi);
+ if (ret)
+ return ret;
+
+ *buf++ = hdmi_readb(hdmi, HDMI_I2CM_DATAI);
+ }
+ i2c->is_segment = false;
+
+ return 0;
+}
+
+static int dw_hdmi_i2c_write(struct dw_hdmi *hdmi,
+ unsigned char *buf, unsigned int length)
+{
+ struct dw_hdmi_i2c *i2c = hdmi->i2c;
+ int ret;
+
+ if (!i2c->is_regaddr) {
+ /* Use the first write byte as register address */
+ i2c->slave_reg = buf[0];
+ length--;
+ buf++;
+ i2c->is_regaddr = true;
+ }
+
+ while (length--) {
+ reinit_completion(&i2c->cmp);
+
+ hdmi_writeb(hdmi, *buf++, HDMI_I2CM_DATAO);
+ hdmi_writeb(hdmi, i2c->slave_reg++, HDMI_I2CM_ADDRESS);
+ hdmi_writeb(hdmi, HDMI_I2CM_OPERATION_WRITE,
+ HDMI_I2CM_OPERATION);
+
+ ret = dw_hdmi_i2c_wait(hdmi);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int dw_hdmi_i2c_xfer(struct i2c_adapter *adap,
+ struct i2c_msg *msgs, int num)
+{
+ struct dw_hdmi *hdmi = i2c_get_adapdata(adap);
+ struct dw_hdmi_i2c *i2c = hdmi->i2c;
+ u8 addr = msgs[0].addr;
+ int i, ret = 0;
+
+ if (addr == DDC_CI_ADDR)
+ /*
+ * The internal I2C controller does not support the multi-byte
+ * read and write operations needed for DDC/CI.
+ * TOFIX: Blacklist the DDC/CI address until we filter out
+ * unsupported I2C operations.
+ */
+ return -EOPNOTSUPP;
+
+ dev_dbg(hdmi->dev, "xfer: num: %d, addr: %#x\n", num, addr);
+
+ for (i = 0; i < num; i++) {
+ if (msgs[i].len == 0) {
+ dev_dbg(hdmi->dev,
+ "unsupported transfer %d/%d, no data\n",
+ i + 1, num);
+ return -EOPNOTSUPP;
+ }
+ }
+
+ mutex_lock(&i2c->lock);
+
+ /* Unmute DONE and ERROR interrupts */
+ hdmi_writeb(hdmi, 0x00, HDMI_IH_MUTE_I2CM_STAT0);
+
+ /* Set slave device address taken from the first I2C message */
+ hdmi_writeb(hdmi, addr, HDMI_I2CM_SLAVE);
+
+ /* Set slave device register address on transfer */
+ i2c->is_regaddr = false;
+
+ /* Set segment pointer for I2C extended read mode operation */
+ i2c->is_segment = false;
+
+ for (i = 0; i < num; i++) {
+ dev_dbg(hdmi->dev, "xfer: num: %d/%d, len: %d, flags: %#x\n",
+ i + 1, num, msgs[i].len, msgs[i].flags);
+ if (msgs[i].addr == DDC_SEGMENT_ADDR && msgs[i].len == 1) {
+ i2c->is_segment = true;
+ hdmi_writeb(hdmi, DDC_SEGMENT_ADDR, HDMI_I2CM_SEGADDR);
+ hdmi_writeb(hdmi, *msgs[i].buf, HDMI_I2CM_SEGPTR);
+ } else {
+ if (msgs[i].flags & I2C_M_RD)
+ ret = dw_hdmi_i2c_read(hdmi, msgs[i].buf,
+ msgs[i].len);
+ else
+ ret = dw_hdmi_i2c_write(hdmi, msgs[i].buf,
+ msgs[i].len);
+ }
+ if (ret < 0)
+ break;
+ }
+
+ if (!ret)
+ ret = num;
+
+ /* Mute DONE and ERROR interrupts */
+ hdmi_writeb(hdmi, HDMI_IH_I2CM_STAT0_ERROR | HDMI_IH_I2CM_STAT0_DONE,
+ HDMI_IH_MUTE_I2CM_STAT0);
+
+ mutex_unlock(&i2c->lock);
+
+ return ret;
+}
+
+static u32 dw_hdmi_i2c_func(struct i2c_adapter *adapter)
+{
+ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+static const struct i2c_algorithm dw_hdmi_algorithm = {
+ .master_xfer = dw_hdmi_i2c_xfer,
+ .functionality = dw_hdmi_i2c_func,
+};
+
+static struct i2c_adapter *dw_hdmi_i2c_adapter(struct dw_hdmi *hdmi)
+{
+ struct i2c_adapter *adap;
+ struct dw_hdmi_i2c *i2c;
+ int ret;
+
+ i2c = devm_kzalloc(hdmi->dev, sizeof(*i2c), GFP_KERNEL);
+ if (!i2c)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_init(&i2c->lock);
+ init_completion(&i2c->cmp);
+
+ adap = &i2c->adap;
+ adap->class = I2C_CLASS_DDC;
+ adap->owner = THIS_MODULE;
+ adap->dev.parent = hdmi->dev;
+ adap->algo = &dw_hdmi_algorithm;
+ strlcpy(adap->name, "DesignWare HDMI", sizeof(adap->name));
+ i2c_set_adapdata(adap, hdmi);
+
+ ret = i2c_add_adapter(adap);
+ if (ret) {
+ dev_warn(hdmi->dev, "cannot add %s I2C adapter\n", adap->name);
+ devm_kfree(hdmi->dev, i2c);
+ return ERR_PTR(ret);
+ }
+
+ hdmi->i2c = i2c;
+
+ dev_info(hdmi->dev, "registered %s I2C bus driver\n", adap->name);
+
+ return adap;
+}
+
+static void hdmi_set_cts_n(struct dw_hdmi *hdmi, unsigned int cts,
+ unsigned int n)
+{
+ /* Must be set/cleared first */
+ hdmi_modb(hdmi, 0, HDMI_AUD_CTS3_CTS_MANUAL, HDMI_AUD_CTS3);
+
+ /* nshift factor = 0 */
+ hdmi_modb(hdmi, 0, HDMI_AUD_CTS3_N_SHIFT_MASK, HDMI_AUD_CTS3);
+
+ /* Use automatic CTS generation mode when CTS is not set */
+ if (cts)
+ hdmi_writeb(hdmi, ((cts >> 16) &
+ HDMI_AUD_CTS3_AUDCTS19_16_MASK) |
+ HDMI_AUD_CTS3_CTS_MANUAL,
+ HDMI_AUD_CTS3);
+ else
+ hdmi_writeb(hdmi, 0, HDMI_AUD_CTS3);
+ hdmi_writeb(hdmi, (cts >> 8) & 0xff, HDMI_AUD_CTS2);
+ hdmi_writeb(hdmi, cts & 0xff, HDMI_AUD_CTS1);
+
+ hdmi_writeb(hdmi, (n >> 16) & 0x0f, HDMI_AUD_N3);
+ hdmi_writeb(hdmi, (n >> 8) & 0xff, HDMI_AUD_N2);
+ hdmi_writeb(hdmi, n & 0xff, HDMI_AUD_N1);
+}
+
+static unsigned int hdmi_compute_n(unsigned int freq, unsigned long pixel_clk)
+{
+ unsigned int n = (128 * freq) / 1000;
+ unsigned int mult = 1;
+
+ while (freq > 48000) {
+ mult *= 2;
+ freq /= 2;
+ }
+
+ switch (freq) {
+ case 32000:
+ if (pixel_clk == 25175000)
+ n = 4576;
+ else if (pixel_clk == 27027000)
+ n = 4096;
+ else if (pixel_clk == 74176000 || pixel_clk == 148352000)
+ n = 11648;
+ else if (pixel_clk == 297000000)
+ n = 3072;
+ else
+ n = 4096;
+ n *= mult;
+ break;
+
+ case 44100:
+ if (pixel_clk == 25175000)
+ n = 7007;
+ else if (pixel_clk == 74176000)
+ n = 17836;
+ else if (pixel_clk == 148352000)
+ n = 8918;
+ else if (pixel_clk == 297000000)
+ n = 4704;
+ else
+ n = 6272;
+ n *= mult;
+ break;
+
+ case 48000:
+ if (pixel_clk == 25175000)
+ n = 6864;
+ else if (pixel_clk == 27027000)
+ n = 6144;
+ else if (pixel_clk == 74176000)
+ n = 11648;
+ else if (pixel_clk == 148352000)
+ n = 5824;
+ else if (pixel_clk == 297000000)
+ n = 5120;
+ else
+ n = 6144;
+ n *= mult;
+ break;
+
+ default:
+ break;
+ }
+
+ return n;
+}
+
+/*
+ * When transmitting IEC60958 linear PCM audio, these registers allow to
+ * configure the channel status information of all the channel status
+ * bits in the IEC60958 frame. For the moment this configuration is only
+ * used when the I2S audio interface, General Purpose Audio (GPA),
+ * or AHB audio DMA (AHBAUDDMA) interface is active
+ * (for S/PDIF interface this information comes from the stream).
+ */
+void dw_hdmi_set_channel_status(struct dw_hdmi *hdmi,
+ u8 *channel_status)
+{
+ /*
+ * Set channel status register for frequency and word length.
+ * Use default values for other registers.
+ */
+ hdmi_writeb(hdmi, channel_status[3], HDMI_FC_AUDSCHNLS7);
+ hdmi_writeb(hdmi, channel_status[4], HDMI_FC_AUDSCHNLS8);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_set_channel_status);
+
+static void hdmi_set_clk_regenerator(struct dw_hdmi *hdmi,
+ unsigned long pixel_clk, unsigned int sample_rate)
+{
+ unsigned long ftdms = pixel_clk;
+ unsigned int n, cts;
+ u8 config3;
+ u64 tmp;
+
+ n = hdmi_compute_n(sample_rate, pixel_clk);
+
+ config3 = hdmi_readb(hdmi, HDMI_CONFIG3_ID);
+
+ /* Compute CTS when using internal AHB audio or General Parallel audio*/
+ if ((config3 & HDMI_CONFIG3_AHBAUDDMA) || (config3 & HDMI_CONFIG3_GPAUD)) {
+ /*
+ * Compute the CTS value from the N value. Note that CTS and N
+ * can be up to 20 bits in total, so we need 64-bit math. Also
+ * note that our TDMS clock is not fully accurate; it is
+ * accurate to kHz. This can introduce an unnecessary remainder
+ * in the calculation below, so we don't try to warn about that.
+ */
+ tmp = (u64)ftdms * n;
+ do_div(tmp, 128 * sample_rate);
+ cts = tmp;
+
+ dev_dbg(hdmi->dev, "%s: fs=%uHz ftdms=%lu.%03luMHz N=%d cts=%d\n",
+ __func__, sample_rate,
+ ftdms / 1000000, (ftdms / 1000) % 1000,
+ n, cts);
+ } else {
+ cts = 0;
+ }
+
+ spin_lock_irq(&hdmi->audio_lock);
+ hdmi->audio_n = n;
+ hdmi->audio_cts = cts;
+ hdmi_set_cts_n(hdmi, cts, hdmi->audio_enable ? n : 0);
+ spin_unlock_irq(&hdmi->audio_lock);
+}
+
+static void hdmi_init_clk_regenerator(struct dw_hdmi *hdmi)
+{
+ mutex_lock(&hdmi->audio_mutex);
+ hdmi_set_clk_regenerator(hdmi, 74250000, hdmi->sample_rate);
+ mutex_unlock(&hdmi->audio_mutex);
+}
+
+static void hdmi_clk_regenerator_update_pixel_clock(struct dw_hdmi *hdmi)
+{
+ mutex_lock(&hdmi->audio_mutex);
+ hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mtmdsclock,
+ hdmi->sample_rate);
+ mutex_unlock(&hdmi->audio_mutex);
+}
+
+void dw_hdmi_set_sample_width(struct dw_hdmi *hdmi, unsigned int width)
+{
+ mutex_lock(&hdmi->audio_mutex);
+ hdmi->sample_width = width;
+ mutex_unlock(&hdmi->audio_mutex);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_set_sample_width);
+
+void dw_hdmi_set_sample_non_pcm(struct dw_hdmi *hdmi, unsigned int non_pcm)
+{
+ mutex_lock(&hdmi->audio_mutex);
+ hdmi->sample_non_pcm = non_pcm;
+ mutex_unlock(&hdmi->audio_mutex);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_set_sample_non_pcm);
+
+void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate)
+{
+ mutex_lock(&hdmi->audio_mutex);
+ hdmi->sample_rate = rate;
+ hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mtmdsclock,
+ hdmi->sample_rate);
+ mutex_unlock(&hdmi->audio_mutex);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_set_sample_rate);
+
+void dw_hdmi_set_channel_count(struct dw_hdmi *hdmi, unsigned int cnt)
+{
+ u8 layout;
+
+ mutex_lock(&hdmi->audio_mutex);
+ hdmi->channels = cnt;
+
+ /*
+ * For >2 channel PCM audio, we need to select layout 1
+ * and set an appropriate channel map.
+ */
+ if (cnt > 2)
+ layout = HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_LAYOUT1;
+ else
+ layout = HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_LAYOUT0;
+
+ hdmi_modb(hdmi, layout, HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_MASK,
+ HDMI_FC_AUDSCONF);
+
+ /* Set the audio infoframes channel count */
+ hdmi_modb(hdmi, (cnt - 1) << HDMI_FC_AUDICONF0_CC_OFFSET,
+ HDMI_FC_AUDICONF0_CC_MASK, HDMI_FC_AUDICONF0);
+
+ mutex_unlock(&hdmi->audio_mutex);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_set_channel_count);
+
+void dw_hdmi_set_channel_allocation(struct dw_hdmi *hdmi, unsigned int ca)
+{
+ mutex_lock(&hdmi->audio_mutex);
+
+ hdmi_writeb(hdmi, ca, HDMI_FC_AUDICONF2);
+
+ mutex_unlock(&hdmi->audio_mutex);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_set_channel_allocation);
+
+static void hdmi_enable_audio_clk(struct dw_hdmi *hdmi, bool enable)
+{
+ if (enable)
+ hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_AUDCLK_DISABLE;
+ else
+ hdmi->mc_clkdis |= HDMI_MC_CLKDIS_AUDCLK_DISABLE;
+ hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
+}
+
+static u8 *hdmi_audio_get_eld(struct dw_hdmi *hdmi)
+{
+ if (!hdmi->curr_conn)
+ return NULL;
+
+ return hdmi->curr_conn->eld;
+}
+
+static void dw_hdmi_gp_audio_enable(struct dw_hdmi *hdmi)
+{
+ const struct dw_hdmi_plat_data *pdata = hdmi->plat_data;
+ int sample_freq = 0x2, org_sample_freq = 0xD;
+ int ch_mask = BIT(hdmi->channels) - 1;
+
+ switch (hdmi->sample_rate) {
+ case 32000:
+ sample_freq = 0x03;
+ org_sample_freq = 0x0C;
+ break;
+ case 44100:
+ sample_freq = 0x00;
+ org_sample_freq = 0x0F;
+ break;
+ case 48000:
+ sample_freq = 0x02;
+ org_sample_freq = 0x0D;
+ break;
+ case 88200:
+ sample_freq = 0x08;
+ org_sample_freq = 0x07;
+ break;
+ case 96000:
+ sample_freq = 0x0A;
+ org_sample_freq = 0x05;
+ break;
+ case 176400:
+ sample_freq = 0x0C;
+ org_sample_freq = 0x03;
+ break;
+ case 192000:
+ sample_freq = 0x0E;
+ org_sample_freq = 0x01;
+ break;
+ default:
+ break;
+ }
+
+ hdmi_set_cts_n(hdmi, hdmi->audio_cts, hdmi->audio_n);
+ hdmi_enable_audio_clk(hdmi, true);
+
+ hdmi_writeb(hdmi, 0x1, HDMI_FC_AUDSCHNLS0);
+ hdmi_writeb(hdmi, hdmi->channels, HDMI_FC_AUDSCHNLS2);
+ hdmi_writeb(hdmi, 0x22, HDMI_FC_AUDSCHNLS3);
+ hdmi_writeb(hdmi, 0x22, HDMI_FC_AUDSCHNLS4);
+ hdmi_writeb(hdmi, 0x11, HDMI_FC_AUDSCHNLS5);
+ hdmi_writeb(hdmi, 0x11, HDMI_FC_AUDSCHNLS6);
+ hdmi_writeb(hdmi, (0x3 << 4) | sample_freq, HDMI_FC_AUDSCHNLS7);
+ hdmi_writeb(hdmi, (org_sample_freq << 4) | 0xb, HDMI_FC_AUDSCHNLS8);
+
+ hdmi_writeb(hdmi, ch_mask, HDMI_GP_CONF1);
+ hdmi_writeb(hdmi, 0x02, HDMI_GP_CONF2);
+ hdmi_writeb(hdmi, 0x01, HDMI_GP_CONF0);
+
+ hdmi_modb(hdmi, 0x3, 0x3, HDMI_FC_DATAUTO3);
+
+ /* hbr */
+ if (hdmi->sample_rate == 192000 && hdmi->channels == 8 &&
+ hdmi->sample_width == 32 && hdmi->sample_non_pcm)
+ hdmi_modb(hdmi, 0x01, 0x01, HDMI_GP_CONF2);
+
+ if (pdata->enable_audio)
+ pdata->enable_audio(hdmi,
+ hdmi->channels,
+ hdmi->sample_width,
+ hdmi->sample_rate,
+ hdmi->sample_non_pcm);
+}
+
+static void dw_hdmi_gp_audio_disable(struct dw_hdmi *hdmi)
+{
+ const struct dw_hdmi_plat_data *pdata = hdmi->plat_data;
+
+ hdmi_set_cts_n(hdmi, hdmi->audio_cts, 0);
+
+ hdmi_modb(hdmi, 0, 0x3, HDMI_FC_DATAUTO3);
+ if (pdata->disable_audio)
+ pdata->disable_audio(hdmi);
+
+ hdmi_enable_audio_clk(hdmi, false);
+}
+
+static void dw_hdmi_ahb_audio_enable(struct dw_hdmi *hdmi)
+{
+ hdmi_set_cts_n(hdmi, hdmi->audio_cts, hdmi->audio_n);
+}
+
+static void dw_hdmi_ahb_audio_disable(struct dw_hdmi *hdmi)
+{
+ hdmi_set_cts_n(hdmi, hdmi->audio_cts, 0);
+}
+
+static void dw_hdmi_i2s_audio_enable(struct dw_hdmi *hdmi)
+{
+ hdmi_set_cts_n(hdmi, hdmi->audio_cts, hdmi->audio_n);
+ hdmi_enable_audio_clk(hdmi, true);
+}
+
+static void dw_hdmi_i2s_audio_disable(struct dw_hdmi *hdmi)
+{
+ hdmi_enable_audio_clk(hdmi, false);
+}
+
+void dw_hdmi_audio_enable(struct dw_hdmi *hdmi)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&hdmi->audio_lock, flags);
+ hdmi->audio_enable = true;
+ if (hdmi->enable_audio)
+ hdmi->enable_audio(hdmi);
+ spin_unlock_irqrestore(&hdmi->audio_lock, flags);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_audio_enable);
+
+void dw_hdmi_audio_disable(struct dw_hdmi *hdmi)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&hdmi->audio_lock, flags);
+ hdmi->audio_enable = false;
+ if (hdmi->disable_audio)
+ hdmi->disable_audio(hdmi);
+ spin_unlock_irqrestore(&hdmi->audio_lock, flags);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_audio_disable);
+
+static bool hdmi_bus_fmt_is_rgb(unsigned int bus_format)
+{
+ switch (bus_format) {
+ case MEDIA_BUS_FMT_RGB888_1X24:
+ case MEDIA_BUS_FMT_RGB101010_1X30:
+ case MEDIA_BUS_FMT_RGB121212_1X36:
+ case MEDIA_BUS_FMT_RGB161616_1X48:
+ return true;
+
+ default:
+ return false;
+ }
+}
+
+static bool hdmi_bus_fmt_is_yuv444(unsigned int bus_format)
+{
+ switch (bus_format) {
+ case MEDIA_BUS_FMT_YUV8_1X24:
+ case MEDIA_BUS_FMT_YUV10_1X30:
+ case MEDIA_BUS_FMT_YUV12_1X36:
+ case MEDIA_BUS_FMT_YUV16_1X48:
+ return true;
+
+ default:
+ return false;
+ }
+}
+
+static bool hdmi_bus_fmt_is_yuv422(unsigned int bus_format)
+{
+ switch (bus_format) {
+ case MEDIA_BUS_FMT_UYVY8_1X16:
+ case MEDIA_BUS_FMT_UYVY10_1X20:
+ case MEDIA_BUS_FMT_UYVY12_1X24:
+ return true;
+
+ default:
+ return false;
+ }
+}
+
+static bool hdmi_bus_fmt_is_yuv420(unsigned int bus_format)
+{
+ switch (bus_format) {
+ case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
+ case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
+ case MEDIA_BUS_FMT_UYYVYY12_0_5X36:
+ case MEDIA_BUS_FMT_UYYVYY16_0_5X48:
+ return true;
+
+ default:
+ return false;
+ }
+}
+
+static int hdmi_bus_fmt_color_depth(unsigned int bus_format)
+{
+ switch (bus_format) {
+ case MEDIA_BUS_FMT_RGB888_1X24:
+ case MEDIA_BUS_FMT_YUV8_1X24:
+ case MEDIA_BUS_FMT_UYVY8_1X16:
+ case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
+ return 8;
+
+ case MEDIA_BUS_FMT_RGB101010_1X30:
+ case MEDIA_BUS_FMT_YUV10_1X30:
+ case MEDIA_BUS_FMT_UYVY10_1X20:
+ case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
+ return 10;
+
+ case MEDIA_BUS_FMT_RGB121212_1X36:
+ case MEDIA_BUS_FMT_YUV12_1X36:
+ case MEDIA_BUS_FMT_UYVY12_1X24:
+ case MEDIA_BUS_FMT_UYYVYY12_0_5X36:
+ return 12;
+
+ case MEDIA_BUS_FMT_RGB161616_1X48:
+ case MEDIA_BUS_FMT_YUV16_1X48:
+ case MEDIA_BUS_FMT_UYYVYY16_0_5X48:
+ return 16;
+
+ default:
+ return 0;
+ }
+}
+
+/*
+ * this submodule is responsible for the video data synchronization.
+ * for example, for RGB 4:4:4 input, the data map is defined as
+ * pin{47~40} <==> R[7:0]
+ * pin{31~24} <==> G[7:0]
+ * pin{15~8} <==> B[7:0]
+ */
+static void hdmi_video_sample(struct dw_hdmi *hdmi)
+{
+ int color_format = 0;
+ u8 val;
+
+ switch (hdmi->hdmi_data.enc_in_bus_format) {
+ case MEDIA_BUS_FMT_RGB888_1X24:
+ color_format = 0x01;
+ break;
+ case MEDIA_BUS_FMT_RGB101010_1X30:
+ color_format = 0x03;
+ break;
+ case MEDIA_BUS_FMT_RGB121212_1X36:
+ color_format = 0x05;
+ break;
+ case MEDIA_BUS_FMT_RGB161616_1X48:
+ color_format = 0x07;
+ break;
+
+ case MEDIA_BUS_FMT_YUV8_1X24:
+ case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
+ color_format = 0x09;
+ break;
+ case MEDIA_BUS_FMT_YUV10_1X30:
+ case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
+ color_format = 0x0B;
+ break;
+ case MEDIA_BUS_FMT_YUV12_1X36:
+ case MEDIA_BUS_FMT_UYYVYY12_0_5X36:
+ color_format = 0x0D;
+ break;
+ case MEDIA_BUS_FMT_YUV16_1X48:
+ case MEDIA_BUS_FMT_UYYVYY16_0_5X48:
+ color_format = 0x0F;
+ break;
+
+ case MEDIA_BUS_FMT_UYVY8_1X16:
+ color_format = 0x16;
+ break;
+ case MEDIA_BUS_FMT_UYVY10_1X20:
+ color_format = 0x14;
+ break;
+ case MEDIA_BUS_FMT_UYVY12_1X24:
+ color_format = 0x12;
+ break;
+
+ default:
+ return;
+ }
+
+ val = HDMI_TX_INVID0_INTERNAL_DE_GENERATOR_DISABLE |
+ ((color_format << HDMI_TX_INVID0_VIDEO_MAPPING_OFFSET) &
+ HDMI_TX_INVID0_VIDEO_MAPPING_MASK);
+ hdmi_writeb(hdmi, val, HDMI_TX_INVID0);
+
+ /* Enable TX stuffing: When DE is inactive, fix the output data to 0 */
+ val = HDMI_TX_INSTUFFING_BDBDATA_STUFFING_ENABLE |
+ HDMI_TX_INSTUFFING_RCRDATA_STUFFING_ENABLE |
+ HDMI_TX_INSTUFFING_GYDATA_STUFFING_ENABLE;
+ hdmi_writeb(hdmi, val, HDMI_TX_INSTUFFING);
+ hdmi_writeb(hdmi, 0x0, HDMI_TX_GYDATA0);
+ hdmi_writeb(hdmi, 0x0, HDMI_TX_GYDATA1);
+ hdmi_writeb(hdmi, 0x0, HDMI_TX_RCRDATA0);
+ hdmi_writeb(hdmi, 0x0, HDMI_TX_RCRDATA1);
+ hdmi_writeb(hdmi, 0x0, HDMI_TX_BCBDATA0);
+ hdmi_writeb(hdmi, 0x0, HDMI_TX_BCBDATA1);
+}
+
+static int is_color_space_conversion(struct dw_hdmi *hdmi)
+{
+ struct hdmi_data_info *hdmi_data = &hdmi->hdmi_data;
+ bool is_input_rgb, is_output_rgb;
+
+ is_input_rgb = hdmi_bus_fmt_is_rgb(hdmi_data->enc_in_bus_format);
+ is_output_rgb = hdmi_bus_fmt_is_rgb(hdmi_data->enc_out_bus_format);
+
+ return (is_input_rgb != is_output_rgb) ||
+ (is_input_rgb && is_output_rgb && hdmi_data->rgb_limited_range);
+}
+
+static int is_color_space_decimation(struct dw_hdmi *hdmi)
+{
+ if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format))
+ return 0;
+
+ if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_in_bus_format) ||
+ hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_in_bus_format))
+ return 1;
+
+ return 0;
+}
+
+static int is_color_space_interpolation(struct dw_hdmi *hdmi)
+{
+ if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_in_bus_format))
+ return 0;
+
+ if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format) ||
+ hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format))
+ return 1;
+
+ return 0;
+}
+
+static bool is_csc_needed(struct dw_hdmi *hdmi)
+{
+ return is_color_space_conversion(hdmi) ||
+ is_color_space_decimation(hdmi) ||
+ is_color_space_interpolation(hdmi);
+}
+
+static void dw_hdmi_update_csc_coeffs(struct dw_hdmi *hdmi)
+{
+ const u16 (*csc_coeff)[3][4] = &csc_coeff_default;
+ bool is_input_rgb, is_output_rgb;
+ unsigned i;
+ u32 csc_scale = 1;
+
+ is_input_rgb = hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_in_bus_format);
+ is_output_rgb = hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format);
+
+ if (!is_input_rgb && is_output_rgb) {
+ if (hdmi->hdmi_data.enc_out_encoding == V4L2_YCBCR_ENC_601)
+ csc_coeff = &csc_coeff_rgb_out_eitu601;
+ else
+ csc_coeff = &csc_coeff_rgb_out_eitu709;
+ } else if (is_input_rgb && !is_output_rgb) {
+ if (hdmi->hdmi_data.enc_out_encoding == V4L2_YCBCR_ENC_601)
+ csc_coeff = &csc_coeff_rgb_in_eitu601;
+ else
+ csc_coeff = &csc_coeff_rgb_in_eitu709;
+ csc_scale = 0;
+ } else if (is_input_rgb && is_output_rgb &&
+ hdmi->hdmi_data.rgb_limited_range) {
+ csc_coeff = &csc_coeff_rgb_full_to_rgb_limited;
+ }
+
+ /* The CSC registers are sequential, alternating MSB then LSB */
+ for (i = 0; i < ARRAY_SIZE(csc_coeff_default[0]); i++) {
+ u16 coeff_a = (*csc_coeff)[0][i];
+ u16 coeff_b = (*csc_coeff)[1][i];
+ u16 coeff_c = (*csc_coeff)[2][i];
+
+ hdmi_writeb(hdmi, coeff_a & 0xff, HDMI_CSC_COEF_A1_LSB + i * 2);
+ hdmi_writeb(hdmi, coeff_a >> 8, HDMI_CSC_COEF_A1_MSB + i * 2);
+ hdmi_writeb(hdmi, coeff_b & 0xff, HDMI_CSC_COEF_B1_LSB + i * 2);
+ hdmi_writeb(hdmi, coeff_b >> 8, HDMI_CSC_COEF_B1_MSB + i * 2);
+ hdmi_writeb(hdmi, coeff_c & 0xff, HDMI_CSC_COEF_C1_LSB + i * 2);
+ hdmi_writeb(hdmi, coeff_c >> 8, HDMI_CSC_COEF_C1_MSB + i * 2);
+ }
+
+ hdmi_modb(hdmi, csc_scale, HDMI_CSC_SCALE_CSCSCALE_MASK,
+ HDMI_CSC_SCALE);
+}
+
+static void hdmi_video_csc(struct dw_hdmi *hdmi)
+{
+ int color_depth = 0;
+ int interpolation = HDMI_CSC_CFG_INTMODE_DISABLE;
+ int decimation = 0;
+
+ /* YCC422 interpolation to 444 mode */
+ if (is_color_space_interpolation(hdmi))
+ interpolation = HDMI_CSC_CFG_INTMODE_CHROMA_INT_FORMULA1;
+ else if (is_color_space_decimation(hdmi))
+ decimation = HDMI_CSC_CFG_DECMODE_CHROMA_INT_FORMULA3;
+
+ switch (hdmi_bus_fmt_color_depth(hdmi->hdmi_data.enc_out_bus_format)) {
+ case 8:
+ color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_24BPP;
+ break;
+ case 10:
+ color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_30BPP;
+ break;
+ case 12:
+ color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_36BPP;
+ break;
+ case 16:
+ color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_48BPP;
+ break;
+
+ default:
+ return;
+ }
+
+ /* Configure the CSC registers */
+ hdmi_writeb(hdmi, interpolation | decimation, HDMI_CSC_CFG);
+ hdmi_modb(hdmi, color_depth, HDMI_CSC_SCALE_CSC_COLORDE_PTH_MASK,
+ HDMI_CSC_SCALE);
+
+ dw_hdmi_update_csc_coeffs(hdmi);
+}
+
+/*
+ * HDMI video packetizer is used to packetize the data.
+ * for example, if input is YCC422 mode or repeater is used,
+ * data should be repacked this module can be bypassed.
+ */
+static void hdmi_video_packetize(struct dw_hdmi *hdmi)
+{
+ unsigned int color_depth = 0;
+ unsigned int remap_size = HDMI_VP_REMAP_YCC422_16bit;
+ unsigned int output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_PP;
+ struct hdmi_data_info *hdmi_data = &hdmi->hdmi_data;
+ u8 val, vp_conf;
+ u8 clear_gcp_auto = 0;
+
+
+ if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format) ||
+ hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format) ||
+ hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format)) {
+ switch (hdmi_bus_fmt_color_depth(
+ hdmi->hdmi_data.enc_out_bus_format)) {
+ case 8:
+ color_depth = 4;
+ output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS;
+ clear_gcp_auto = 1;
+ break;
+ case 10:
+ color_depth = 5;
+ break;
+ case 12:
+ color_depth = 6;
+ break;
+ case 16:
+ color_depth = 7;
+ break;
+ default:
+ output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS;
+ }
+ } else if (hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format)) {
+ switch (hdmi_bus_fmt_color_depth(
+ hdmi->hdmi_data.enc_out_bus_format)) {
+ case 0:
+ case 8:
+ remap_size = HDMI_VP_REMAP_YCC422_16bit;
+ clear_gcp_auto = 1;
+ break;
+ case 10:
+ remap_size = HDMI_VP_REMAP_YCC422_20bit;
+ break;
+ case 12:
+ remap_size = HDMI_VP_REMAP_YCC422_24bit;
+ break;
+
+ default:
+ return;
+ }
+ output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_YCC422;
+ } else {
+ return;
+ }
+
+ /* set the packetizer registers */
+ val = ((color_depth << HDMI_VP_PR_CD_COLOR_DEPTH_OFFSET) &
+ HDMI_VP_PR_CD_COLOR_DEPTH_MASK) |
+ ((hdmi_data->pix_repet_factor <<
+ HDMI_VP_PR_CD_DESIRED_PR_FACTOR_OFFSET) &
+ HDMI_VP_PR_CD_DESIRED_PR_FACTOR_MASK);
+ hdmi_writeb(hdmi, val, HDMI_VP_PR_CD);
+
+ /* HDMI1.4b specification section 6.5.3:
+ * Source shall only send GCPs with non-zero CD to sinks
+ * that indicate support for Deep Color.
+ * GCP only transmit CD and do not handle AVMUTE, PP norDefault_Phase (yet).
+ * Disable Auto GCP when 24-bit color for sinks that not support Deep Color.
+ */
+ val = hdmi_readb(hdmi, HDMI_FC_DATAUTO3);
+ if (clear_gcp_auto == 1)
+ val &= ~HDMI_FC_DATAUTO3_GCP_AUTO;
+ else
+ val |= HDMI_FC_DATAUTO3_GCP_AUTO;
+ hdmi_writeb(hdmi, val, HDMI_FC_DATAUTO3);
+
+ hdmi_modb(hdmi, HDMI_VP_STUFF_PR_STUFFING_STUFFING_MODE,
+ HDMI_VP_STUFF_PR_STUFFING_MASK, HDMI_VP_STUFF);
+
+ /* Data from pixel repeater block */
+ if (hdmi_data->pix_repet_factor > 1) {
+ vp_conf = HDMI_VP_CONF_PR_EN_ENABLE |
+ HDMI_VP_CONF_BYPASS_SELECT_PIX_REPEATER;
+ } else { /* data from packetizer block */
+ vp_conf = HDMI_VP_CONF_PR_EN_DISABLE |
+ HDMI_VP_CONF_BYPASS_SELECT_VID_PACKETIZER;
+ }
+
+ hdmi_modb(hdmi, vp_conf,
+ HDMI_VP_CONF_PR_EN_MASK |
+ HDMI_VP_CONF_BYPASS_SELECT_MASK, HDMI_VP_CONF);
+
+ hdmi_modb(hdmi, 1 << HDMI_VP_STUFF_IDEFAULT_PHASE_OFFSET,
+ HDMI_VP_STUFF_IDEFAULT_PHASE_MASK, HDMI_VP_STUFF);
+
+ hdmi_writeb(hdmi, remap_size, HDMI_VP_REMAP);
+
+ if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_PP) {
+ vp_conf = HDMI_VP_CONF_BYPASS_EN_DISABLE |
+ HDMI_VP_CONF_PP_EN_ENABLE |
+ HDMI_VP_CONF_YCC422_EN_DISABLE;
+ } else if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_YCC422) {
+ vp_conf = HDMI_VP_CONF_BYPASS_EN_DISABLE |
+ HDMI_VP_CONF_PP_EN_DISABLE |
+ HDMI_VP_CONF_YCC422_EN_ENABLE;
+ } else if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS) {
+ vp_conf = HDMI_VP_CONF_BYPASS_EN_ENABLE |
+ HDMI_VP_CONF_PP_EN_DISABLE |
+ HDMI_VP_CONF_YCC422_EN_DISABLE;
+ } else {
+ return;
+ }
+
+ hdmi_modb(hdmi, vp_conf,
+ HDMI_VP_CONF_BYPASS_EN_MASK | HDMI_VP_CONF_PP_EN_ENMASK |
+ HDMI_VP_CONF_YCC422_EN_MASK, HDMI_VP_CONF);
+
+ hdmi_modb(hdmi, HDMI_VP_STUFF_PP_STUFFING_STUFFING_MODE |
+ HDMI_VP_STUFF_YCC422_STUFFING_STUFFING_MODE,
+ HDMI_VP_STUFF_PP_STUFFING_MASK |
+ HDMI_VP_STUFF_YCC422_STUFFING_MASK, HDMI_VP_STUFF);
+
+ hdmi_modb(hdmi, output_select, HDMI_VP_CONF_OUTPUT_SELECTOR_MASK,
+ HDMI_VP_CONF);
+}
+
+/* -----------------------------------------------------------------------------
+ * Synopsys PHY Handling
+ */
+
+static inline void hdmi_phy_test_clear(struct dw_hdmi *hdmi,
+ unsigned char bit)
+{
+ hdmi_modb(hdmi, bit << HDMI_PHY_TST0_TSTCLR_OFFSET,
+ HDMI_PHY_TST0_TSTCLR_MASK, HDMI_PHY_TST0);
+}
+
+static bool hdmi_phy_wait_i2c_done(struct dw_hdmi *hdmi, int msec)
+{
+ u32 val;
+
+ while ((val = hdmi_readb(hdmi, HDMI_IH_I2CMPHY_STAT0) & 0x3) == 0) {
+ if (msec-- == 0)
+ return false;
+ udelay(1000);
+ }
+ hdmi_writeb(hdmi, val, HDMI_IH_I2CMPHY_STAT0);
+
+ return true;
+}
+
+void dw_hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
+ unsigned char addr)
+{
+ hdmi_writeb(hdmi, 0xFF, HDMI_IH_I2CMPHY_STAT0);
+ hdmi_writeb(hdmi, addr, HDMI_PHY_I2CM_ADDRESS_ADDR);
+ hdmi_writeb(hdmi, (unsigned char)(data >> 8),
+ HDMI_PHY_I2CM_DATAO_1_ADDR);
+ hdmi_writeb(hdmi, (unsigned char)(data >> 0),
+ HDMI_PHY_I2CM_DATAO_0_ADDR);
+ hdmi_writeb(hdmi, HDMI_PHY_I2CM_OPERATION_ADDR_WRITE,
+ HDMI_PHY_I2CM_OPERATION_ADDR);
+ hdmi_phy_wait_i2c_done(hdmi, 1000);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_write);
+
+/* Filter out invalid setups to avoid configuring SCDC and scrambling */
+static bool dw_hdmi_support_scdc(struct dw_hdmi *hdmi,
+ const struct drm_display_info *display)
+{
+ /* Completely disable SCDC support for older controllers */
+ if (hdmi->version < 0x200a)
+ return false;
+
+ /* Disable if no DDC bus */
+ if (!hdmi->ddc)
+ return false;
+
+ /* Disable if SCDC is not supported, or if an HF-VSDB block is absent */
+ if (!display->hdmi.scdc.supported ||
+ !display->hdmi.scdc.scrambling.supported)
+ return false;
+
+ /*
+ * Disable if display only support low TMDS rates and scrambling
+ * for low rates is not supported either
+ */
+ if (!display->hdmi.scdc.scrambling.low_rates &&
+ display->max_tmds_clock <= 340000)
+ return false;
+
+ return true;
+}
+
+/*
+ * HDMI2.0 Specifies the following procedure for High TMDS Bit Rates:
+ * - The Source shall suspend transmission of the TMDS clock and data
+ * - The Source shall write to the TMDS_Bit_Clock_Ratio bit to change it
+ * from a 0 to a 1 or from a 1 to a 0
+ * - The Source shall allow a minimum of 1 ms and a maximum of 100 ms from
+ * the time the TMDS_Bit_Clock_Ratio bit is written until resuming
+ * transmission of TMDS clock and data
+ *
+ * To respect the 100ms maximum delay, the dw_hdmi_set_high_tmds_clock_ratio()
+ * helper should called right before enabling the TMDS Clock and Data in
+ * the PHY configuration callback.
+ */
+void dw_hdmi_set_high_tmds_clock_ratio(struct dw_hdmi *hdmi,
+ const struct drm_display_info *display)
+{
+ unsigned long mtmdsclock = hdmi->hdmi_data.video_mode.mtmdsclock;
+
+ /* Control for TMDS Bit Period/TMDS Clock-Period Ratio */
+ if (dw_hdmi_support_scdc(hdmi, display)) {
+ if (mtmdsclock > HDMI14_MAX_TMDSCLK)
+ drm_scdc_set_high_tmds_clock_ratio(hdmi->ddc, 1);
+ else
+ drm_scdc_set_high_tmds_clock_ratio(hdmi->ddc, 0);
+ }
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_set_high_tmds_clock_ratio);
+
+static void dw_hdmi_phy_enable_powerdown(struct dw_hdmi *hdmi, bool enable)
+{
+ hdmi_mask_writeb(hdmi, !enable, HDMI_PHY_CONF0,
+ HDMI_PHY_CONF0_PDZ_OFFSET,
+ HDMI_PHY_CONF0_PDZ_MASK);
+}
+
+static void dw_hdmi_phy_enable_tmds(struct dw_hdmi *hdmi, u8 enable)
+{
+ hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
+ HDMI_PHY_CONF0_ENTMDS_OFFSET,
+ HDMI_PHY_CONF0_ENTMDS_MASK);
+}
+
+static void dw_hdmi_phy_enable_svsret(struct dw_hdmi *hdmi, u8 enable)
+{
+ hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
+ HDMI_PHY_CONF0_SVSRET_OFFSET,
+ HDMI_PHY_CONF0_SVSRET_MASK);
+}
+
+void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
+{
+ hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
+ HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET,
+ HDMI_PHY_CONF0_GEN2_PDDQ_MASK);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_pddq);
+
+void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
+{
+ hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
+ HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET,
+ HDMI_PHY_CONF0_GEN2_TXPWRON_MASK);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_txpwron);
+
+static void dw_hdmi_phy_sel_data_en_pol(struct dw_hdmi *hdmi, u8 enable)
+{
+ hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
+ HDMI_PHY_CONF0_SELDATAENPOL_OFFSET,
+ HDMI_PHY_CONF0_SELDATAENPOL_MASK);
+}
+
+static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable)
+{
+ hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
+ HDMI_PHY_CONF0_SELDIPIF_OFFSET,
+ HDMI_PHY_CONF0_SELDIPIF_MASK);
+}
+
+void dw_hdmi_phy_gen1_reset(struct dw_hdmi *hdmi)
+{
+ /* PHY reset. The reset signal is active low on Gen1 PHYs. */
+ hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
+ hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen1_reset);
+
+void dw_hdmi_phy_gen2_reset(struct dw_hdmi *hdmi)
+{
+ /* PHY reset. The reset signal is active high on Gen2 PHYs. */
+ hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
+ hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_reset);
+
+void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address)
+{
+ hdmi_phy_test_clear(hdmi, 1);
+ hdmi_writeb(hdmi, address, HDMI_PHY_I2CM_SLAVE_ADDR);
+ hdmi_phy_test_clear(hdmi, 0);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_set_addr);
+
+static void dw_hdmi_phy_power_off(struct dw_hdmi *hdmi)
+{
+ const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
+ unsigned int i;
+ u16 val;
+
+ if (phy->gen == 1) {
+ dw_hdmi_phy_enable_tmds(hdmi, 0);
+ dw_hdmi_phy_enable_powerdown(hdmi, true);
+ return;
+ }
+
+ dw_hdmi_phy_gen2_txpwron(hdmi, 0);
+
+ /*
+ * Wait for TX_PHY_LOCK to be deasserted to indicate that the PHY went
+ * to low power mode.
+ */
+ for (i = 0; i < 5; ++i) {
+ val = hdmi_readb(hdmi, HDMI_PHY_STAT0);
+ if (!(val & HDMI_PHY_TX_PHY_LOCK))
+ break;
+
+ usleep_range(1000, 2000);
+ }
+
+ if (val & HDMI_PHY_TX_PHY_LOCK)
+ dev_warn(hdmi->dev, "PHY failed to power down\n");
+ else
+ dev_dbg(hdmi->dev, "PHY powered down in %u iterations\n", i);
+
+ dw_hdmi_phy_gen2_pddq(hdmi, 1);
+}
+
+static int dw_hdmi_phy_power_on(struct dw_hdmi *hdmi)
+{
+ const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
+ unsigned int i;
+ u8 val;
+
+ if (phy->gen == 1) {
+ dw_hdmi_phy_enable_powerdown(hdmi, false);
+
+ /* Toggle TMDS enable. */
+ dw_hdmi_phy_enable_tmds(hdmi, 0);
+ dw_hdmi_phy_enable_tmds(hdmi, 1);
+ return 0;
+ }
+
+ dw_hdmi_phy_gen2_txpwron(hdmi, 1);
+ dw_hdmi_phy_gen2_pddq(hdmi, 0);
+
+ /* Wait for PHY PLL lock */
+ for (i = 0; i < 5; ++i) {
+ val = hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_TX_PHY_LOCK;
+ if (val)
+ break;
+
+ usleep_range(1000, 2000);
+ }
+
+ if (!val) {
+ dev_err(hdmi->dev, "PHY PLL failed to lock\n");
+ return -ETIMEDOUT;
+ }
+
+ dev_dbg(hdmi->dev, "PHY PLL locked %u iterations\n", i);
+ return 0;
+}
+
+/*
+ * PHY configuration function for the DWC HDMI 3D TX PHY. Based on the available
+ * information the DWC MHL PHY has the same register layout and is thus also
+ * supported by this function.
+ */
+static int hdmi_phy_configure_dwc_hdmi_3d_tx(struct dw_hdmi *hdmi,
+ const struct dw_hdmi_plat_data *pdata,
+ unsigned long mpixelclock)
+{
+ const struct dw_hdmi_mpll_config *mpll_config = pdata->mpll_cfg;
+ const struct dw_hdmi_curr_ctrl *curr_ctrl = pdata->cur_ctr;
+ const struct dw_hdmi_phy_config *phy_config = pdata->phy_config;
+
+ /* TOFIX Will need 420 specific PHY configuration tables */
+
+ /* PLL/MPLL Cfg - always match on final entry */
+ for (; mpll_config->mpixelclock != ~0UL; mpll_config++)
+ if (mpixelclock <= mpll_config->mpixelclock)
+ break;
+
+ for (; curr_ctrl->mpixelclock != ~0UL; curr_ctrl++)
+ if (mpixelclock <= curr_ctrl->mpixelclock)
+ break;
+
+ for (; phy_config->mpixelclock != ~0UL; phy_config++)
+ if (mpixelclock <= phy_config->mpixelclock)
+ break;
+
+ if (mpll_config->mpixelclock == ~0UL ||
+ curr_ctrl->mpixelclock == ~0UL ||
+ phy_config->mpixelclock == ~0UL)
+ return -EINVAL;
+
+ dw_hdmi_phy_i2c_write(hdmi, mpll_config->res[0].cpce,
+ HDMI_3D_TX_PHY_CPCE_CTRL);
+ dw_hdmi_phy_i2c_write(hdmi, mpll_config->res[0].gmp,
+ HDMI_3D_TX_PHY_GMPCTRL);
+ dw_hdmi_phy_i2c_write(hdmi, curr_ctrl->curr[0],
+ HDMI_3D_TX_PHY_CURRCTRL);
+
+ dw_hdmi_phy_i2c_write(hdmi, 0, HDMI_3D_TX_PHY_PLLPHBYCTRL);
+ dw_hdmi_phy_i2c_write(hdmi, HDMI_3D_TX_PHY_MSM_CTRL_CKO_SEL_FB_CLK,
+ HDMI_3D_TX_PHY_MSM_CTRL);
+
+ dw_hdmi_phy_i2c_write(hdmi, phy_config->term, HDMI_3D_TX_PHY_TXTERM);
+ dw_hdmi_phy_i2c_write(hdmi, phy_config->sym_ctr,
+ HDMI_3D_TX_PHY_CKSYMTXCTRL);
+ dw_hdmi_phy_i2c_write(hdmi, phy_config->vlev_ctr,
+ HDMI_3D_TX_PHY_VLEVCTRL);
+
+ /* Override and disable clock termination. */
+ dw_hdmi_phy_i2c_write(hdmi, HDMI_3D_TX_PHY_CKCALCTRL_OVERRIDE,
+ HDMI_3D_TX_PHY_CKCALCTRL);
+
+ return 0;
+}
+
+static int hdmi_phy_configure(struct dw_hdmi *hdmi,
+ const struct drm_display_info *display)
+{
+ const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
+ const struct dw_hdmi_plat_data *pdata = hdmi->plat_data;
+ unsigned long mpixelclock = hdmi->hdmi_data.video_mode.mpixelclock;
+ unsigned long mtmdsclock = hdmi->hdmi_data.video_mode.mtmdsclock;
+ int ret;
+
+ dw_hdmi_phy_power_off(hdmi);
+
+ dw_hdmi_set_high_tmds_clock_ratio(hdmi, display);
+
+ /* Leave low power consumption mode by asserting SVSRET. */
+ if (phy->has_svsret)
+ dw_hdmi_phy_enable_svsret(hdmi, 1);
+
+ dw_hdmi_phy_gen2_reset(hdmi);
+
+ hdmi_writeb(hdmi, HDMI_MC_HEACPHY_RST_ASSERT, HDMI_MC_HEACPHY_RST);
+
+ dw_hdmi_phy_i2c_set_addr(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2);
+
+ /* Write to the PHY as configured by the platform */
+ if (pdata->configure_phy)
+ ret = pdata->configure_phy(hdmi, pdata->priv_data, mpixelclock);
+ else
+ ret = phy->configure(hdmi, pdata, mpixelclock);
+ if (ret) {
+ dev_err(hdmi->dev, "PHY configuration failed (clock %lu)\n",
+ mpixelclock);
+ return ret;
+ }
+
+ /* Wait for resuming transmission of TMDS clock and data */
+ if (mtmdsclock > HDMI14_MAX_TMDSCLK)
+ msleep(100);
+
+ return dw_hdmi_phy_power_on(hdmi);
+}
+
+static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data,
+ const struct drm_display_info *display,
+ const struct drm_display_mode *mode)
+{
+ int i, ret;
+
+ /* HDMI Phy spec says to do the phy initialization sequence twice */
+ for (i = 0; i < 2; i++) {
+ dw_hdmi_phy_sel_data_en_pol(hdmi, 1);
+ dw_hdmi_phy_sel_interface_control(hdmi, 0);
+
+ ret = hdmi_phy_configure(hdmi, display);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi, void *data)
+{
+ dw_hdmi_phy_power_off(hdmi);
+}
+
+enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
+ void *data)
+{
+ return hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD ?
+ connector_status_connected : connector_status_disconnected;
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_read_hpd);
+
+void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
+ bool force, bool disabled, bool rxsense)
+{
+ u8 old_mask = hdmi->phy_mask;
+
+ if (force || disabled || !rxsense)
+ hdmi->phy_mask |= HDMI_PHY_RX_SENSE;
+ else
+ hdmi->phy_mask &= ~HDMI_PHY_RX_SENSE;
+
+ if (old_mask != hdmi->phy_mask)
+ hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_update_hpd);
+
+void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
+{
+ /*
+ * Configure the PHY RX SENSE and HPD interrupts polarities and clear
+ * any pending interrupt.
+ */
+ hdmi_writeb(hdmi, HDMI_PHY_HPD | HDMI_PHY_RX_SENSE, HDMI_PHY_POL0);
+ hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE,
+ HDMI_IH_PHY_STAT0);
+
+ /* Enable cable hot plug irq. */
+ hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
+
+ /* Clear and unmute interrupts. */
+ hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE,
+ HDMI_IH_PHY_STAT0);
+ hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
+ HDMI_IH_MUTE_PHY_STAT0);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_setup_hpd);
+
+static const struct dw_hdmi_phy_ops dw_hdmi_synopsys_phy_ops = {
+ .init = dw_hdmi_phy_init,
+ .disable = dw_hdmi_phy_disable,
+ .read_hpd = dw_hdmi_phy_read_hpd,
+ .update_hpd = dw_hdmi_phy_update_hpd,
+ .setup_hpd = dw_hdmi_phy_setup_hpd,
+};
+
+/* -----------------------------------------------------------------------------
+ * HDMI TX Setup
+ */
+
+static void hdmi_tx_hdcp_config(struct dw_hdmi *hdmi)
+{
+ u8 de;
+
+ if (hdmi->hdmi_data.video_mode.mdataenablepolarity)
+ de = HDMI_A_VIDPOLCFG_DATAENPOL_ACTIVE_HIGH;
+ else
+ de = HDMI_A_VIDPOLCFG_DATAENPOL_ACTIVE_LOW;
+
+ /* disable rx detect */
+ hdmi_modb(hdmi, HDMI_A_HDCPCFG0_RXDETECT_DISABLE,
+ HDMI_A_HDCPCFG0_RXDETECT_MASK, HDMI_A_HDCPCFG0);
+
+ hdmi_modb(hdmi, de, HDMI_A_VIDPOLCFG_DATAENPOL_MASK, HDMI_A_VIDPOLCFG);
+
+ hdmi_modb(hdmi, HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_DISABLE,
+ HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_MASK, HDMI_A_HDCPCFG1);
+}
+
+static void hdmi_config_AVI(struct dw_hdmi *hdmi,
+ const struct drm_connector *connector,
+ const struct drm_display_mode *mode)
+{
+ struct hdmi_avi_infoframe frame;
+ u8 val;
+
+ /* Initialise info frame from DRM mode */
+ drm_hdmi_avi_infoframe_from_display_mode(&frame, connector, mode);
+
+ if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format)) {
+ drm_hdmi_avi_infoframe_quant_range(&frame, connector, mode,
+ hdmi->hdmi_data.rgb_limited_range ?
+ HDMI_QUANTIZATION_RANGE_LIMITED :
+ HDMI_QUANTIZATION_RANGE_FULL);
+ } else {
+ frame.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
+ frame.ycc_quantization_range =
+ HDMI_YCC_QUANTIZATION_RANGE_LIMITED;
+ }
+
+ if (hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format))
+ frame.colorspace = HDMI_COLORSPACE_YUV444;
+ else if (hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format))
+ frame.colorspace = HDMI_COLORSPACE_YUV422;
+ else if (hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format))
+ frame.colorspace = HDMI_COLORSPACE_YUV420;
+ else
+ frame.colorspace = HDMI_COLORSPACE_RGB;
+
+ /* Set up colorimetry */
+ if (!hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format)) {
+ switch (hdmi->hdmi_data.enc_out_encoding) {
+ case V4L2_YCBCR_ENC_601:
+ if (hdmi->hdmi_data.enc_in_encoding == V4L2_YCBCR_ENC_XV601)
+ frame.colorimetry = HDMI_COLORIMETRY_EXTENDED;
+ else
+ frame.colorimetry = HDMI_COLORIMETRY_ITU_601;
+ frame.extended_colorimetry =
+ HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
+ break;
+ case V4L2_YCBCR_ENC_709:
+ if (hdmi->hdmi_data.enc_in_encoding == V4L2_YCBCR_ENC_XV709)
+ frame.colorimetry = HDMI_COLORIMETRY_EXTENDED;
+ else
+ frame.colorimetry = HDMI_COLORIMETRY_ITU_709;
+ frame.extended_colorimetry =
+ HDMI_EXTENDED_COLORIMETRY_XV_YCC_709;
+ break;
+ default: /* Carries no data */
+ frame.colorimetry = HDMI_COLORIMETRY_ITU_601;
+ frame.extended_colorimetry =
+ HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
+ break;
+ }
+ } else {
+ frame.colorimetry = HDMI_COLORIMETRY_NONE;
+ frame.extended_colorimetry =
+ HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
+ }
+
+ /*
+ * The Designware IP uses a different byte format from standard
+ * AVI info frames, though generally the bits are in the correct
+ * bytes.
+ */
+
+ /*
+ * AVI data byte 1 differences: Colorspace in bits 0,1 rather than 5,6,
+ * scan info in bits 4,5 rather than 0,1 and active aspect present in
+ * bit 6 rather than 4.
+ */
+ val = (frame.scan_mode & 3) << 4 | (frame.colorspace & 3);
+ if (frame.active_aspect & 15)
+ val |= HDMI_FC_AVICONF0_ACTIVE_FMT_INFO_PRESENT;
+ if (frame.top_bar || frame.bottom_bar)
+ val |= HDMI_FC_AVICONF0_BAR_DATA_HORIZ_BAR;
+ if (frame.left_bar || frame.right_bar)
+ val |= HDMI_FC_AVICONF0_BAR_DATA_VERT_BAR;
+ hdmi_writeb(hdmi, val, HDMI_FC_AVICONF0);
+
+ /* AVI data byte 2 differences: none */
+ val = ((frame.colorimetry & 0x3) << 6) |
+ ((frame.picture_aspect & 0x3) << 4) |
+ (frame.active_aspect & 0xf);
+ hdmi_writeb(hdmi, val, HDMI_FC_AVICONF1);
+
+ /* AVI data byte 3 differences: none */
+ val = ((frame.extended_colorimetry & 0x7) << 4) |
+ ((frame.quantization_range & 0x3) << 2) |
+ (frame.nups & 0x3);
+ if (frame.itc)
+ val |= HDMI_FC_AVICONF2_IT_CONTENT_VALID;
+ hdmi_writeb(hdmi, val, HDMI_FC_AVICONF2);
+
+ /* AVI data byte 4 differences: none */
+ val = frame.video_code & 0x7f;
+ hdmi_writeb(hdmi, val, HDMI_FC_AVIVID);
+
+ /* AVI Data Byte 5- set up input and output pixel repetition */
+ val = (((hdmi->hdmi_data.video_mode.mpixelrepetitioninput + 1) <<
+ HDMI_FC_PRCONF_INCOMING_PR_FACTOR_OFFSET) &
+ HDMI_FC_PRCONF_INCOMING_PR_FACTOR_MASK) |
+ ((hdmi->hdmi_data.video_mode.mpixelrepetitionoutput <<
+ HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_OFFSET) &
+ HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_MASK);
+ hdmi_writeb(hdmi, val, HDMI_FC_PRCONF);
+
+ /*
+ * AVI data byte 5 differences: content type in 0,1 rather than 4,5,
+ * ycc range in bits 2,3 rather than 6,7
+ */
+ val = ((frame.ycc_quantization_range & 0x3) << 2) |
+ (frame.content_type & 0x3);
+ hdmi_writeb(hdmi, val, HDMI_FC_AVICONF3);
+
+ /* AVI Data Bytes 6-13 */
+ hdmi_writeb(hdmi, frame.top_bar & 0xff, HDMI_FC_AVIETB0);
+ hdmi_writeb(hdmi, (frame.top_bar >> 8) & 0xff, HDMI_FC_AVIETB1);
+ hdmi_writeb(hdmi, frame.bottom_bar & 0xff, HDMI_FC_AVISBB0);
+ hdmi_writeb(hdmi, (frame.bottom_bar >> 8) & 0xff, HDMI_FC_AVISBB1);
+ hdmi_writeb(hdmi, frame.left_bar & 0xff, HDMI_FC_AVIELB0);
+ hdmi_writeb(hdmi, (frame.left_bar >> 8) & 0xff, HDMI_FC_AVIELB1);
+ hdmi_writeb(hdmi, frame.right_bar & 0xff, HDMI_FC_AVISRB0);
+ hdmi_writeb(hdmi, (frame.right_bar >> 8) & 0xff, HDMI_FC_AVISRB1);
+}
+
+static void hdmi_config_vendor_specific_infoframe(struct dw_hdmi *hdmi,
+ const struct drm_connector *connector,
+ const struct drm_display_mode *mode)
+{
+ struct hdmi_vendor_infoframe frame;
+ u8 buffer[10];
+ ssize_t err;
+
+ err = drm_hdmi_vendor_infoframe_from_display_mode(&frame, connector,
+ mode);
+ if (err < 0)
+ /*
+ * Going into that statement does not means vendor infoframe
+ * fails. It just informed us that vendor infoframe is not
+ * needed for the selected mode. Only 4k or stereoscopic 3D
+ * mode requires vendor infoframe. So just simply return.
+ */
+ return;
+
+ err = hdmi_vendor_infoframe_pack(&frame, buffer, sizeof(buffer));
+ if (err < 0) {
+ dev_err(hdmi->dev, "Failed to pack vendor infoframe: %zd\n",
+ err);
+ return;
+ }
+ hdmi_mask_writeb(hdmi, 0, HDMI_FC_DATAUTO0, HDMI_FC_DATAUTO0_VSD_OFFSET,
+ HDMI_FC_DATAUTO0_VSD_MASK);
+
+ /* Set the length of HDMI vendor specific InfoFrame payload */
+ hdmi_writeb(hdmi, buffer[2], HDMI_FC_VSDSIZE);
+
+ /* Set 24bit IEEE Registration Identifier */
+ hdmi_writeb(hdmi, buffer[4], HDMI_FC_VSDIEEEID0);
+ hdmi_writeb(hdmi, buffer[5], HDMI_FC_VSDIEEEID1);
+ hdmi_writeb(hdmi, buffer[6], HDMI_FC_VSDIEEEID2);
+
+ /* Set HDMI_Video_Format and HDMI_VIC/3D_Structure */
+ hdmi_writeb(hdmi, buffer[7], HDMI_FC_VSDPAYLOAD0);
+ hdmi_writeb(hdmi, buffer[8], HDMI_FC_VSDPAYLOAD1);
+
+ if (frame.s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
+ hdmi_writeb(hdmi, buffer[9], HDMI_FC_VSDPAYLOAD2);
+
+ /* Packet frame interpolation */
+ hdmi_writeb(hdmi, 1, HDMI_FC_DATAUTO1);
+
+ /* Auto packets per frame and line spacing */
+ hdmi_writeb(hdmi, 0x11, HDMI_FC_DATAUTO2);
+
+ /* Configures the Frame Composer On RDRB mode */
+ hdmi_mask_writeb(hdmi, 1, HDMI_FC_DATAUTO0, HDMI_FC_DATAUTO0_VSD_OFFSET,
+ HDMI_FC_DATAUTO0_VSD_MASK);
+}
+
+static void hdmi_config_drm_infoframe(struct dw_hdmi *hdmi,
+ const struct drm_connector *connector)
+{
+ const struct drm_connector_state *conn_state = connector->state;
+ struct hdmi_drm_infoframe frame;
+ u8 buffer[30];
+ ssize_t err;
+ int i;
+
+ if (!hdmi->plat_data->use_drm_infoframe)
+ return;
+
+ hdmi_modb(hdmi, HDMI_FC_PACKET_TX_EN_DRM_DISABLE,
+ HDMI_FC_PACKET_TX_EN_DRM_MASK, HDMI_FC_PACKET_TX_EN);
+
+ err = drm_hdmi_infoframe_set_hdr_metadata(&frame, conn_state);
+ if (err < 0)
+ return;
+
+ err = hdmi_drm_infoframe_pack(&frame, buffer, sizeof(buffer));
+ if (err < 0) {
+ dev_err(hdmi->dev, "Failed to pack drm infoframe: %zd\n", err);
+ return;
+ }
+
+ hdmi_writeb(hdmi, frame.version, HDMI_FC_DRM_HB0);
+ hdmi_writeb(hdmi, frame.length, HDMI_FC_DRM_HB1);
+
+ for (i = 0; i < frame.length; i++)
+ hdmi_writeb(hdmi, buffer[4 + i], HDMI_FC_DRM_PB0 + i);
+
+ hdmi_writeb(hdmi, 1, HDMI_FC_DRM_UP);
+ hdmi_modb(hdmi, HDMI_FC_PACKET_TX_EN_DRM_ENABLE,
+ HDMI_FC_PACKET_TX_EN_DRM_MASK, HDMI_FC_PACKET_TX_EN);
+}
+
+static void hdmi_av_composer(struct dw_hdmi *hdmi,
+ const struct drm_display_info *display,
+ const struct drm_display_mode *mode)
+{
+ u8 inv_val, bytes;
+ const struct drm_hdmi_info *hdmi_info = &display->hdmi;
+ struct hdmi_vmode *vmode = &hdmi->hdmi_data.video_mode;
+ int hblank, vblank, h_de_hs, v_de_vs, hsync_len, vsync_len;
+ unsigned int vdisplay, hdisplay;
+
+ vmode->mpixelclock = mode->clock * 1000;
+
+ dev_dbg(hdmi->dev, "final pixclk = %d\n", vmode->mpixelclock);
+
+ vmode->mtmdsclock = vmode->mpixelclock;
+
+ if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format)) {
+ switch (hdmi_bus_fmt_color_depth(
+ hdmi->hdmi_data.enc_out_bus_format)) {
+ case 16:
+ vmode->mtmdsclock = vmode->mpixelclock * 2;
+ break;
+ case 12:
+ vmode->mtmdsclock = vmode->mpixelclock * 3 / 2;
+ break;
+ case 10:
+ vmode->mtmdsclock = vmode->mpixelclock * 5 / 4;
+ break;
+ }
+ }
+
+ if (hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format))
+ vmode->mtmdsclock /= 2;
+
+ dev_dbg(hdmi->dev, "final tmdsclock = %d\n", vmode->mtmdsclock);
+
+ /* Set up HDMI_FC_INVIDCONF */
+ inv_val = (hdmi->hdmi_data.hdcp_enable ||
+ (dw_hdmi_support_scdc(hdmi, display) &&
+ (vmode->mtmdsclock > HDMI14_MAX_TMDSCLK ||
+ hdmi_info->scdc.scrambling.low_rates)) ?
+ HDMI_FC_INVIDCONF_HDCP_KEEPOUT_ACTIVE :
+ HDMI_FC_INVIDCONF_HDCP_KEEPOUT_INACTIVE);
+
+ inv_val |= mode->flags & DRM_MODE_FLAG_PVSYNC ?
+ HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_HIGH :
+ HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_LOW;
+
+ inv_val |= mode->flags & DRM_MODE_FLAG_PHSYNC ?
+ HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_HIGH :
+ HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_LOW;
+
+ inv_val |= (vmode->mdataenablepolarity ?
+ HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_HIGH :
+ HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_LOW);
+
+ if (hdmi->vic == 39)
+ inv_val |= HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH;
+ else
+ inv_val |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
+ HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH :
+ HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_LOW;
+
+ inv_val |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
+ HDMI_FC_INVIDCONF_IN_I_P_INTERLACED :
+ HDMI_FC_INVIDCONF_IN_I_P_PROGRESSIVE;
+
+ inv_val |= hdmi->sink_is_hdmi ?
+ HDMI_FC_INVIDCONF_DVI_MODEZ_HDMI_MODE :
+ HDMI_FC_INVIDCONF_DVI_MODEZ_DVI_MODE;
+
+ hdmi_writeb(hdmi, inv_val, HDMI_FC_INVIDCONF);
+
+ hdisplay = mode->hdisplay;
+ hblank = mode->htotal - mode->hdisplay;
+ h_de_hs = mode->hsync_start - mode->hdisplay;
+ hsync_len = mode->hsync_end - mode->hsync_start;
+
+ /*
+ * When we're setting a YCbCr420 mode, we need
+ * to adjust the horizontal timing to suit.
+ */
+ if (hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format)) {
+ hdisplay /= 2;
+ hblank /= 2;
+ h_de_hs /= 2;
+ hsync_len /= 2;
+ }
+
+ vdisplay = mode->vdisplay;
+ vblank = mode->vtotal - mode->vdisplay;
+ v_de_vs = mode->vsync_start - mode->vdisplay;
+ vsync_len = mode->vsync_end - mode->vsync_start;
+
+ /*
+ * When we're setting an interlaced mode, we need
+ * to adjust the vertical timing to suit.
+ */
+ if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
+ vdisplay /= 2;
+ vblank /= 2;
+ v_de_vs /= 2;
+ vsync_len /= 2;
+ }
+
+ /* Scrambling Control */
+ if (dw_hdmi_support_scdc(hdmi, display)) {
+ if (vmode->mtmdsclock > HDMI14_MAX_TMDSCLK ||
+ hdmi_info->scdc.scrambling.low_rates) {
+ /*
+ * HDMI2.0 Specifies the following procedure:
+ * After the Source Device has determined that
+ * SCDC_Present is set (=1), the Source Device should
+ * write the accurate Version of the Source Device
+ * to the Source Version field in the SCDCS.
+ * Source Devices compliant shall set the
+ * Source Version = 1.
+ */
+ drm_scdc_readb(hdmi->ddc, SCDC_SINK_VERSION,
+ &bytes);
+ drm_scdc_writeb(hdmi->ddc, SCDC_SOURCE_VERSION,
+ min_t(u8, bytes, SCDC_MIN_SOURCE_VERSION));
+
+ /* Enabled Scrambling in the Sink */
+ drm_scdc_set_scrambling(hdmi->ddc, 1);
+
+ /*
+ * To activate the scrambler feature, you must ensure
+ * that the quasi-static configuration bit
+ * fc_invidconf.HDCP_keepout is set at configuration
+ * time, before the required mc_swrstzreq.tmdsswrst_req
+ * reset request is issued.
+ */
+ hdmi_writeb(hdmi, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ,
+ HDMI_MC_SWRSTZ);
+ hdmi_writeb(hdmi, 1, HDMI_FC_SCRAMBLER_CTRL);
+ } else {
+ hdmi_writeb(hdmi, 0, HDMI_FC_SCRAMBLER_CTRL);
+ hdmi_writeb(hdmi, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ,
+ HDMI_MC_SWRSTZ);
+ drm_scdc_set_scrambling(hdmi->ddc, 0);
+ }
+ }
+
+ /* Set up horizontal active pixel width */
+ hdmi_writeb(hdmi, hdisplay >> 8, HDMI_FC_INHACTV1);
+ hdmi_writeb(hdmi, hdisplay, HDMI_FC_INHACTV0);
+
+ /* Set up vertical active lines */
+ hdmi_writeb(hdmi, vdisplay >> 8, HDMI_FC_INVACTV1);
+ hdmi_writeb(hdmi, vdisplay, HDMI_FC_INVACTV0);
+
+ /* Set up horizontal blanking pixel region width */
+ hdmi_writeb(hdmi, hblank >> 8, HDMI_FC_INHBLANK1);
+ hdmi_writeb(hdmi, hblank, HDMI_FC_INHBLANK0);
+
+ /* Set up vertical blanking pixel region width */
+ hdmi_writeb(hdmi, vblank, HDMI_FC_INVBLANK);
+
+ /* Set up HSYNC active edge delay width (in pixel clks) */
+ hdmi_writeb(hdmi, h_de_hs >> 8, HDMI_FC_HSYNCINDELAY1);
+ hdmi_writeb(hdmi, h_de_hs, HDMI_FC_HSYNCINDELAY0);
+
+ /* Set up VSYNC active edge delay (in lines) */
+ hdmi_writeb(hdmi, v_de_vs, HDMI_FC_VSYNCINDELAY);
+
+ /* Set up HSYNC active pulse width (in pixel clks) */
+ hdmi_writeb(hdmi, hsync_len >> 8, HDMI_FC_HSYNCINWIDTH1);
+ hdmi_writeb(hdmi, hsync_len, HDMI_FC_HSYNCINWIDTH0);
+
+ /* Set up VSYNC active edge delay (in lines) */
+ hdmi_writeb(hdmi, vsync_len, HDMI_FC_VSYNCINWIDTH);
+}
+
+/* HDMI Initialization Step B.4 */
+static void dw_hdmi_enable_video_path(struct dw_hdmi *hdmi)
+{
+ /* control period minimum duration */
+ hdmi_writeb(hdmi, 12, HDMI_FC_CTRLDUR);
+ hdmi_writeb(hdmi, 32, HDMI_FC_EXCTRLDUR);
+ hdmi_writeb(hdmi, 1, HDMI_FC_EXCTRLSPAC);
+
+ /* Set to fill TMDS data channels */
+ hdmi_writeb(hdmi, 0x0B, HDMI_FC_CH0PREAM);
+ hdmi_writeb(hdmi, 0x16, HDMI_FC_CH1PREAM);
+ hdmi_writeb(hdmi, 0x21, HDMI_FC_CH2PREAM);
+
+ /* Enable pixel clock and tmds data path */
+ hdmi->mc_clkdis |= HDMI_MC_CLKDIS_HDCPCLK_DISABLE |
+ HDMI_MC_CLKDIS_CSCCLK_DISABLE |
+ HDMI_MC_CLKDIS_AUDCLK_DISABLE |
+ HDMI_MC_CLKDIS_PREPCLK_DISABLE |
+ HDMI_MC_CLKDIS_TMDSCLK_DISABLE;
+ hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_PIXELCLK_DISABLE;
+ hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
+
+ hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_TMDSCLK_DISABLE;
+ hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
+
+ /* Enable csc path */
+ if (is_csc_needed(hdmi)) {
+ hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_CSCCLK_DISABLE;
+ hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
+
+ hdmi_writeb(hdmi, HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_IN_PATH,
+ HDMI_MC_FLOWCTRL);
+ } else {
+ hdmi->mc_clkdis |= HDMI_MC_CLKDIS_CSCCLK_DISABLE;
+ hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
+
+ hdmi_writeb(hdmi, HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_BYPASS,
+ HDMI_MC_FLOWCTRL);
+ }
+}
+
+/* Workaround to clear the overflow condition */
+static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
+{
+ unsigned int count;
+ unsigned int i;
+ u8 val;
+
+ /*
+ * Under some circumstances the Frame Composer arithmetic unit can miss
+ * an FC register write due to being busy processing the previous one.
+ * The issue can be worked around by issuing a TMDS software reset and
+ * then write one of the FC registers several times.
+ *
+ * The number of iterations matters and depends on the HDMI TX revision
+ * (and possibly on the platform).
+ * 4 iterations for i.MX6Q(v1.30a) and 1 iteration for others.
+ * i.MX6DL (v1.31a), Allwinner SoCs (v1.32a), Rockchip RK3288 SoC (v2.00a),
+ * Amlogic Meson GX SoCs (v2.01a), RK3328/RK3399 SoCs (v2.11a)
+ * and i.MX8MPlus (v2.13a) have been identified as needing the workaround
+ * with a single iteration.
+ */
+
+ switch (hdmi->version) {
+ case 0x130a:
+ count = 4;
+ break;
+ default:
+ count = 1;
+ break;
+ }
+
+ /* TMDS software reset */
+ hdmi_writeb(hdmi, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ, HDMI_MC_SWRSTZ);
+
+ val = hdmi_readb(hdmi, HDMI_FC_INVIDCONF);
+ for (i = 0; i < count; i++)
+ hdmi_writeb(hdmi, val, HDMI_FC_INVIDCONF);
+}
+
+static void hdmi_disable_overflow_interrupts(struct dw_hdmi *hdmi)
+{
+ hdmi_writeb(hdmi, HDMI_IH_MUTE_FC_STAT2_OVERFLOW_MASK,
+ HDMI_IH_MUTE_FC_STAT2);
+}
+
+static int dw_hdmi_setup(struct dw_hdmi *hdmi,
+ const struct drm_connector *connector,
+ const struct drm_display_mode *mode)
+{
+ int ret;
+
+ hdmi_disable_overflow_interrupts(hdmi);
+
+ hdmi->vic = drm_match_cea_mode(mode);
+
+ if (!hdmi->vic) {
+ dev_dbg(hdmi->dev, "Non-CEA mode used in HDMI\n");
+ } else {
+ dev_dbg(hdmi->dev, "CEA mode used vic=%d\n", hdmi->vic);
+ }
+
+ if ((hdmi->vic == 6) || (hdmi->vic == 7) ||
+ (hdmi->vic == 21) || (hdmi->vic == 22) ||
+ (hdmi->vic == 2) || (hdmi->vic == 3) ||
+ (hdmi->vic == 17) || (hdmi->vic == 18))
+ hdmi->hdmi_data.enc_out_encoding = V4L2_YCBCR_ENC_601;
+ else
+ hdmi->hdmi_data.enc_out_encoding = V4L2_YCBCR_ENC_709;
+
+ hdmi->hdmi_data.video_mode.mpixelrepetitionoutput = 0;
+ hdmi->hdmi_data.video_mode.mpixelrepetitioninput = 0;
+
+ if (hdmi->hdmi_data.enc_in_bus_format == MEDIA_BUS_FMT_FIXED)
+ hdmi->hdmi_data.enc_in_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+
+ /* TOFIX: Get input encoding from plat data or fallback to none */
+ if (hdmi->plat_data->input_bus_encoding)
+ hdmi->hdmi_data.enc_in_encoding =
+ hdmi->plat_data->input_bus_encoding;
+ else
+ hdmi->hdmi_data.enc_in_encoding = V4L2_YCBCR_ENC_DEFAULT;
+
+ if (hdmi->hdmi_data.enc_out_bus_format == MEDIA_BUS_FMT_FIXED)
+ hdmi->hdmi_data.enc_out_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+
+ hdmi->hdmi_data.rgb_limited_range = hdmi->sink_is_hdmi &&
+ drm_default_rgb_quant_range(mode) ==
+ HDMI_QUANTIZATION_RANGE_LIMITED;
+
+ hdmi->hdmi_data.pix_repet_factor = 0;
+ hdmi->hdmi_data.hdcp_enable = 0;
+ hdmi->hdmi_data.video_mode.mdataenablepolarity = true;
+
+ /* HDMI Initialization Step B.1 */
+ hdmi_av_composer(hdmi, &connector->display_info, mode);
+
+ /* HDMI Initializateion Step B.2 */
+ ret = hdmi->phy.ops->init(hdmi, hdmi->phy.data,
+ &connector->display_info,
+ &hdmi->previous_mode);
+ if (ret)
+ return ret;
+ hdmi->phy.enabled = true;
+
+ /* HDMI Initialization Step B.3 */
+ dw_hdmi_enable_video_path(hdmi);
+
+ if (hdmi->sink_has_audio) {
+ dev_dbg(hdmi->dev, "sink has audio support\n");
+
+ /* HDMI Initialization Step E - Configure audio */
+ hdmi_clk_regenerator_update_pixel_clock(hdmi);
+ hdmi_enable_audio_clk(hdmi, hdmi->audio_enable);
+ }
+
+ /* not for DVI mode */
+ if (hdmi->sink_is_hdmi) {
+ dev_dbg(hdmi->dev, "%s HDMI mode\n", __func__);
+
+ /* HDMI Initialization Step F - Configure AVI InfoFrame */
+ hdmi_config_AVI(hdmi, connector, mode);
+ hdmi_config_vendor_specific_infoframe(hdmi, connector, mode);
+ hdmi_config_drm_infoframe(hdmi, connector);
+ } else {
+ dev_dbg(hdmi->dev, "%s DVI mode\n", __func__);
+ }
+
+ hdmi_video_packetize(hdmi);
+ hdmi_video_csc(hdmi);
+ hdmi_video_sample(hdmi);
+ hdmi_tx_hdcp_config(hdmi);
+
+ dw_hdmi_clear_overflow(hdmi);
+
+ return 0;
+}
+
+static void initialize_hdmi_ih_mutes(struct dw_hdmi *hdmi)
+{
+ u8 ih_mute;
+
+ /*
+ * Boot up defaults are:
+ * HDMI_IH_MUTE = 0x03 (disabled)
+ * HDMI_IH_MUTE_* = 0x00 (enabled)
+ *
+ * Disable top level interrupt bits in HDMI block
+ */
+ ih_mute = hdmi_readb(hdmi, HDMI_IH_MUTE) |
+ HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT |
+ HDMI_IH_MUTE_MUTE_ALL_INTERRUPT;
+
+ hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE);
+
+ /* by default mask all interrupts */
+ hdmi_writeb(hdmi, 0xff, HDMI_VP_MASK);
+ hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK0);
+ hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK1);
+ hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK2);
+ hdmi_writeb(hdmi, 0xff, HDMI_PHY_MASK0);
+ hdmi_writeb(hdmi, 0xff, HDMI_PHY_I2CM_INT_ADDR);
+ hdmi_writeb(hdmi, 0xff, HDMI_PHY_I2CM_CTLINT_ADDR);
+ hdmi_writeb(hdmi, 0xff, HDMI_AUD_INT);
+ hdmi_writeb(hdmi, 0xff, HDMI_AUD_SPDIFINT);
+ hdmi_writeb(hdmi, 0xff, HDMI_AUD_HBR_MASK);
+ hdmi_writeb(hdmi, 0xff, HDMI_GP_MASK);
+ hdmi_writeb(hdmi, 0xff, HDMI_A_APIINTMSK);
+ hdmi_writeb(hdmi, 0xff, HDMI_I2CM_INT);
+ hdmi_writeb(hdmi, 0xff, HDMI_I2CM_CTLINT);
+
+ /* Disable interrupts in the IH_MUTE_* registers */
+ hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT0);
+ hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT1);
+ hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT2);
+ hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_AS_STAT0);
+ hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_PHY_STAT0);
+ hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_I2CM_STAT0);
+ hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_CEC_STAT0);
+ hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_VP_STAT0);
+ hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_I2CMPHY_STAT0);
+ hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_AHBDMAAUD_STAT0);
+
+ /* Enable top level interrupt bits in HDMI block */
+ ih_mute &= ~(HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT |
+ HDMI_IH_MUTE_MUTE_ALL_INTERRUPT);
+ hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE);
+}
+
+static void dw_hdmi_poweron(struct dw_hdmi *hdmi)
+{
+ hdmi->bridge_is_on = true;
+
+ /*
+ * The curr_conn field is guaranteed to be valid here, as this function
+ * is only be called when !hdmi->disabled.
+ */
+ dw_hdmi_setup(hdmi, hdmi->curr_conn, &hdmi->previous_mode);
+}
+
+static void dw_hdmi_poweroff(struct dw_hdmi *hdmi)
+{
+ if (hdmi->phy.enabled) {
+ hdmi->phy.ops->disable(hdmi, hdmi->phy.data);
+ hdmi->phy.enabled = false;
+ }
+
+ hdmi->bridge_is_on = false;
+}
+
+static void dw_hdmi_update_power(struct dw_hdmi *hdmi)
+{
+ int force = hdmi->force;
+
+ if (hdmi->disabled) {
+ force = DRM_FORCE_OFF;
+ } else if (force == DRM_FORCE_UNSPECIFIED) {
+ if (hdmi->rxsense)
+ force = DRM_FORCE_ON;
+ else
+ force = DRM_FORCE_OFF;
+ }
+
+ if (force == DRM_FORCE_OFF) {
+ if (hdmi->bridge_is_on)
+ dw_hdmi_poweroff(hdmi);
+ } else {
+ if (!hdmi->bridge_is_on)
+ dw_hdmi_poweron(hdmi);
+ }
+}
+
+/*
+ * Adjust the detection of RXSENSE according to whether we have a forced
+ * connection mode enabled, or whether we have been disabled. There is
+ * no point processing RXSENSE interrupts if we have a forced connection
+ * state, or DRM has us disabled.
+ *
+ * We also disable rxsense interrupts when we think we're disconnected
+ * to avoid floating TDMS signals giving false rxsense interrupts.
+ *
+ * Note: we still need to listen for HPD interrupts even when DRM has us
+ * disabled so that we can detect a connect event.
+ */
+static void dw_hdmi_update_phy_mask(struct dw_hdmi *hdmi)
+{
+ if (hdmi->phy.ops->update_hpd)
+ hdmi->phy.ops->update_hpd(hdmi, hdmi->phy.data,
+ hdmi->force, hdmi->disabled,
+ hdmi->rxsense);
+}
+
+static enum drm_connector_status dw_hdmi_detect(struct dw_hdmi *hdmi)
+{
+ enum drm_connector_status result;
+
+ result = hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
+
+ mutex_lock(&hdmi->mutex);
+ if (result != hdmi->last_connector_result) {
+ dev_dbg(hdmi->dev, "read_hpd result: %d", result);
+ handle_plugged_change(hdmi,
+ result == connector_status_connected);
+ hdmi->last_connector_result = result;
+ }
+ mutex_unlock(&hdmi->mutex);
+
+ return result;
+}
+
+static struct edid *dw_hdmi_get_edid(struct dw_hdmi *hdmi,
+ struct drm_connector *connector)
+{
+ struct edid *edid;
+
+ if (!hdmi->ddc)
+ return NULL;
+
+ edid = drm_get_edid(connector, hdmi->ddc);
+ if (!edid) {
+ dev_dbg(hdmi->dev, "failed to get edid\n");
+ return NULL;
+ }
+
+ dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
+ edid->width_cm, edid->height_cm);
+
+ hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
+ hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
+
+ return edid;
+}
+
+/* -----------------------------------------------------------------------------
+ * DRM Connector Operations
+ */
+
+static enum drm_connector_status
+dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
+{
+ struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
+ connector);
+ return dw_hdmi_detect(hdmi);
+}
+
+static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
+{
+ struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
+ connector);
+ struct edid *edid;
+ int ret;
+
+ edid = dw_hdmi_get_edid(hdmi, connector);
+ if (!edid)
+ return 0;
+
+ drm_connector_update_edid_property(connector, edid);
+ cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
+ ret = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+
+ return ret;
+}
+
+static int dw_hdmi_connector_atomic_check(struct drm_connector *connector,
+ struct drm_atomic_state *state)
+{
+ struct drm_connector_state *old_state =
+ drm_atomic_get_old_connector_state(state, connector);
+ struct drm_connector_state *new_state =
+ drm_atomic_get_new_connector_state(state, connector);
+ struct drm_crtc *crtc = new_state->crtc;
+ struct drm_crtc_state *crtc_state;
+
+ if (!crtc)
+ return 0;
+
+ if (!drm_connector_atomic_hdr_metadata_equal(old_state, new_state)) {
+ crtc_state = drm_atomic_get_crtc_state(state, crtc);
+ if (IS_ERR(crtc_state))
+ return PTR_ERR(crtc_state);
+
+ crtc_state->mode_changed = true;
+ }
+
+ return 0;
+}
+
+static void dw_hdmi_connector_force(struct drm_connector *connector)
+{
+ struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
+ connector);
+
+ mutex_lock(&hdmi->mutex);
+ hdmi->force = connector->force;
+ dw_hdmi_update_power(hdmi);
+ dw_hdmi_update_phy_mask(hdmi);
+ mutex_unlock(&hdmi->mutex);
+}
+
+static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .detect = dw_hdmi_connector_detect,
+ .destroy = drm_connector_cleanup,
+ .force = dw_hdmi_connector_force,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static const struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = {
+ .get_modes = dw_hdmi_connector_get_modes,
+ .atomic_check = dw_hdmi_connector_atomic_check,
+};
+
+static int dw_hdmi_connector_create(struct dw_hdmi *hdmi)
+{
+ struct drm_connector *connector = &hdmi->connector;
+ struct cec_connector_info conn_info;
+ struct cec_notifier *notifier;
+
+ if (hdmi->version >= 0x200a)
+ connector->ycbcr_420_allowed =
+ hdmi->plat_data->ycbcr_420_allowed;
+ else
+ connector->ycbcr_420_allowed = false;
+
+ connector->interlace_allowed = 1;
+ connector->polled = DRM_CONNECTOR_POLL_HPD;
+
+ drm_connector_helper_add(connector, &dw_hdmi_connector_helper_funcs);
+
+ drm_connector_init_with_ddc(hdmi->bridge.dev, connector,
+ &dw_hdmi_connector_funcs,
+ DRM_MODE_CONNECTOR_HDMIA,
+ hdmi->ddc);
+
+ /*
+ * drm_connector_attach_max_bpc_property() requires the
+ * connector to have a state.
+ */
+ drm_atomic_helper_connector_reset(connector);
+
+ drm_connector_attach_max_bpc_property(connector, 8, 16);
+
+ if (hdmi->version >= 0x200a && hdmi->plat_data->use_drm_infoframe)
+ drm_connector_attach_hdr_output_metadata_property(connector);
+
+ drm_connector_attach_encoder(connector, hdmi->bridge.encoder);
+
+ cec_fill_conn_info_from_drm(&conn_info, connector);
+
+ notifier = cec_notifier_conn_register(hdmi->dev, NULL, &conn_info);
+ if (!notifier)
+ return -ENOMEM;
+
+ mutex_lock(&hdmi->cec_notifier_mutex);
+ hdmi->cec_notifier = notifier;
+ mutex_unlock(&hdmi->cec_notifier_mutex);
+
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * DRM Bridge Operations
+ */
+
+/*
+ * Possible output formats :
+ * - MEDIA_BUS_FMT_UYYVYY16_0_5X48,
+ * - MEDIA_BUS_FMT_UYYVYY12_0_5X36,
+ * - MEDIA_BUS_FMT_UYYVYY10_0_5X30,
+ * - MEDIA_BUS_FMT_UYYVYY8_0_5X24,
+ * - MEDIA_BUS_FMT_YUV16_1X48,
+ * - MEDIA_BUS_FMT_RGB161616_1X48,
+ * - MEDIA_BUS_FMT_UYVY12_1X24,
+ * - MEDIA_BUS_FMT_YUV12_1X36,
+ * - MEDIA_BUS_FMT_RGB121212_1X36,
+ * - MEDIA_BUS_FMT_UYVY10_1X20,
+ * - MEDIA_BUS_FMT_YUV10_1X30,
+ * - MEDIA_BUS_FMT_RGB101010_1X30,
+ * - MEDIA_BUS_FMT_UYVY8_1X16,
+ * - MEDIA_BUS_FMT_YUV8_1X24,
+ * - MEDIA_BUS_FMT_RGB888_1X24,
+ */
+
+/* Can return a maximum of 11 possible output formats for a mode/connector */
+#define MAX_OUTPUT_SEL_FORMATS 11
+
+static u32 *dw_hdmi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ unsigned int *num_output_fmts)
+{
+ struct drm_connector *conn = conn_state->connector;
+ struct drm_display_info *info = &conn->display_info;
+ struct drm_display_mode *mode = &crtc_state->mode;
+ u8 max_bpc = conn_state->max_requested_bpc;
+ bool is_hdmi2_sink = info->hdmi.scdc.supported ||
+ (info->color_formats & DRM_COLOR_FORMAT_YCBCR420);
+ u32 *output_fmts;
+ unsigned int i = 0;
+
+ *num_output_fmts = 0;
+
+ output_fmts = kcalloc(MAX_OUTPUT_SEL_FORMATS, sizeof(*output_fmts),
+ GFP_KERNEL);
+ if (!output_fmts)
+ return NULL;
+
+ /* If dw-hdmi is the first or only bridge, avoid negociating with ourselves */
+ if (list_is_singular(&bridge->encoder->bridge_chain) ||
+ list_is_first(&bridge->chain_node, &bridge->encoder->bridge_chain)) {
+ *num_output_fmts = 1;
+ output_fmts[0] = MEDIA_BUS_FMT_FIXED;
+
+ return output_fmts;
+ }
+
+ /*
+ * If the current mode enforces 4:2:0, force the output but format
+ * to 4:2:0 and do not add the YUV422/444/RGB formats
+ */
+ if (conn->ycbcr_420_allowed &&
+ (drm_mode_is_420_only(info, mode) ||
+ (is_hdmi2_sink && drm_mode_is_420_also(info, mode)))) {
+
+ /* Order bus formats from 16bit to 8bit if supported */
+ if (max_bpc >= 16 && info->bpc == 16 &&
+ (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_48))
+ output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY16_0_5X48;
+
+ if (max_bpc >= 12 && info->bpc >= 12 &&
+ (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_36))
+ output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY12_0_5X36;
+
+ if (max_bpc >= 10 && info->bpc >= 10 &&
+ (info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_30))
+ output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY10_0_5X30;
+
+ /* Default 8bit fallback */
+ output_fmts[i++] = MEDIA_BUS_FMT_UYYVYY8_0_5X24;
+
+ *num_output_fmts = i;
+
+ return output_fmts;
+ }
+
+ /*
+ * Order bus formats from 16bit to 8bit and from YUV422 to RGB
+ * if supported. In any case the default RGB888 format is added
+ */
+
+ /* Default 8bit RGB fallback */
+ output_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24;
+
+ if (max_bpc >= 16 && info->bpc == 16) {
+ if (info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
+ output_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48;
+
+ output_fmts[i++] = MEDIA_BUS_FMT_RGB161616_1X48;
+ }
+
+ if (max_bpc >= 12 && info->bpc >= 12) {
+ if (info->color_formats & DRM_COLOR_FORMAT_YCBCR422)
+ output_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24;
+
+ if (info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
+ output_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36;
+
+ output_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36;
+ }
+
+ if (max_bpc >= 10 && info->bpc >= 10) {
+ if (info->color_formats & DRM_COLOR_FORMAT_YCBCR422)
+ output_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20;
+
+ if (info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
+ output_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30;
+
+ output_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30;
+ }
+
+ if (info->color_formats & DRM_COLOR_FORMAT_YCBCR422)
+ output_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16;
+
+ if (info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
+ output_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24;
+
+ *num_output_fmts = i;
+
+ return output_fmts;
+}
+
+/*
+ * Possible input formats :
+ * - MEDIA_BUS_FMT_RGB888_1X24
+ * - MEDIA_BUS_FMT_YUV8_1X24
+ * - MEDIA_BUS_FMT_UYVY8_1X16
+ * - MEDIA_BUS_FMT_UYYVYY8_0_5X24
+ * - MEDIA_BUS_FMT_RGB101010_1X30
+ * - MEDIA_BUS_FMT_YUV10_1X30
+ * - MEDIA_BUS_FMT_UYVY10_1X20
+ * - MEDIA_BUS_FMT_UYYVYY10_0_5X30
+ * - MEDIA_BUS_FMT_RGB121212_1X36
+ * - MEDIA_BUS_FMT_YUV12_1X36
+ * - MEDIA_BUS_FMT_UYVY12_1X24
+ * - MEDIA_BUS_FMT_UYYVYY12_0_5X36
+ * - MEDIA_BUS_FMT_RGB161616_1X48
+ * - MEDIA_BUS_FMT_YUV16_1X48
+ * - MEDIA_BUS_FMT_UYYVYY16_0_5X48
+ */
+
+/* Can return a maximum of 3 possible input formats for an output format */
+#define MAX_INPUT_SEL_FORMATS 3
+
+static u32 *dw_hdmi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ u32 *input_fmts;
+ unsigned int i = 0;
+
+ *num_input_fmts = 0;
+
+ input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
+ GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ switch (output_fmt) {
+ /* If MEDIA_BUS_FMT_FIXED is tested, return default bus format */
+ case MEDIA_BUS_FMT_FIXED:
+ input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24;
+ break;
+ /* 8bit */
+ case MEDIA_BUS_FMT_RGB888_1X24:
+ input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24;
+ input_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24;
+ input_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16;
+ break;
+ case MEDIA_BUS_FMT_YUV8_1X24:
+ input_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24;
+ input_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16;
+ input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24;
+ break;
+ case MEDIA_BUS_FMT_UYVY8_1X16:
+ input_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16;
+ input_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24;
+ input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24;
+ break;
+
+ /* 10bit */
+ case MEDIA_BUS_FMT_RGB101010_1X30:
+ input_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30;
+ input_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30;
+ input_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20;
+ break;
+ case MEDIA_BUS_FMT_YUV10_1X30:
+ input_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30;
+ input_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20;
+ input_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30;
+ break;
+ case MEDIA_BUS_FMT_UYVY10_1X20:
+ input_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20;
+ input_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30;
+ input_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30;
+ break;
+
+ /* 12bit */
+ case MEDIA_BUS_FMT_RGB121212_1X36:
+ input_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36;
+ input_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36;
+ input_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24;
+ break;
+ case MEDIA_BUS_FMT_YUV12_1X36:
+ input_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36;
+ input_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24;
+ input_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36;
+ break;
+ case MEDIA_BUS_FMT_UYVY12_1X24:
+ input_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24;
+ input_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36;
+ input_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36;
+ break;
+
+ /* 16bit */
+ case MEDIA_BUS_FMT_RGB161616_1X48:
+ input_fmts[i++] = MEDIA_BUS_FMT_RGB161616_1X48;
+ input_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48;
+ break;
+ case MEDIA_BUS_FMT_YUV16_1X48:
+ input_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48;
+ input_fmts[i++] = MEDIA_BUS_FMT_RGB161616_1X48;
+ break;
+
+ /*YUV 4:2:0 */
+ case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
+ case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
+ case MEDIA_BUS_FMT_UYYVYY12_0_5X36:
+ case MEDIA_BUS_FMT_UYYVYY16_0_5X48:
+ input_fmts[i++] = output_fmt;
+ break;
+ }
+
+ *num_input_fmts = i;
+
+ if (*num_input_fmts == 0) {
+ kfree(input_fmts);
+ input_fmts = NULL;
+ }
+
+ return input_fmts;
+}
+
+static int dw_hdmi_bridge_atomic_check(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct dw_hdmi *hdmi = bridge->driver_private;
+
+ hdmi->hdmi_data.enc_out_bus_format =
+ bridge_state->output_bus_cfg.format;
+
+ hdmi->hdmi_data.enc_in_bus_format =
+ bridge_state->input_bus_cfg.format;
+
+ dev_dbg(hdmi->dev, "input format 0x%04x, output format 0x%04x\n",
+ bridge_state->input_bus_cfg.format,
+ bridge_state->output_bus_cfg.format);
+
+ return 0;
+}
+
+static int dw_hdmi_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct dw_hdmi *hdmi = bridge->driver_private;
+
+ if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
+ return drm_bridge_attach(bridge->encoder, hdmi->next_bridge,
+ bridge, flags);
+
+ return dw_hdmi_connector_create(hdmi);
+}
+
+static void dw_hdmi_bridge_detach(struct drm_bridge *bridge)
+{
+ struct dw_hdmi *hdmi = bridge->driver_private;
+
+ mutex_lock(&hdmi->cec_notifier_mutex);
+ cec_notifier_conn_unregister(hdmi->cec_notifier);
+ hdmi->cec_notifier = NULL;
+ mutex_unlock(&hdmi->cec_notifier_mutex);
+}
+
+static enum drm_mode_status
+dw_hdmi_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct dw_hdmi *hdmi = bridge->driver_private;
+ const struct dw_hdmi_plat_data *pdata = hdmi->plat_data;
+ enum drm_mode_status mode_status = MODE_OK;
+
+ /* We don't support double-clocked modes */
+ if (mode->flags & DRM_MODE_FLAG_DBLCLK)
+ return MODE_BAD;
+
+ if (pdata->mode_valid)
+ mode_status = pdata->mode_valid(hdmi, pdata->priv_data, info,
+ mode);
+
+ return mode_status;
+}
+
+static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *orig_mode,
+ const struct drm_display_mode *mode)
+{
+ struct dw_hdmi *hdmi = bridge->driver_private;
+
+ mutex_lock(&hdmi->mutex);
+
+ /* Store the display mode for plugin/DKMS poweron events */
+ drm_mode_copy(&hdmi->previous_mode, mode);
+
+ mutex_unlock(&hdmi->mutex);
+}
+
+static void dw_hdmi_bridge_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_state)
+{
+ struct dw_hdmi *hdmi = bridge->driver_private;
+
+ mutex_lock(&hdmi->mutex);
+ hdmi->disabled = true;
+ hdmi->curr_conn = NULL;
+ dw_hdmi_update_power(hdmi);
+ dw_hdmi_update_phy_mask(hdmi);
+ mutex_unlock(&hdmi->mutex);
+}
+
+static void dw_hdmi_bridge_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_state)
+{
+ struct dw_hdmi *hdmi = bridge->driver_private;
+ struct drm_atomic_state *state = old_state->base.state;
+ struct drm_connector *connector;
+
+ connector = drm_atomic_get_new_connector_for_encoder(state,
+ bridge->encoder);
+
+ mutex_lock(&hdmi->mutex);
+ hdmi->disabled = false;
+ hdmi->curr_conn = connector;
+ dw_hdmi_update_power(hdmi);
+ dw_hdmi_update_phy_mask(hdmi);
+ mutex_unlock(&hdmi->mutex);
+}
+
+static enum drm_connector_status dw_hdmi_bridge_detect(struct drm_bridge *bridge)
+{
+ struct dw_hdmi *hdmi = bridge->driver_private;
+
+ return dw_hdmi_detect(hdmi);
+}
+
+static struct edid *dw_hdmi_bridge_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct dw_hdmi *hdmi = bridge->driver_private;
+
+ return dw_hdmi_get_edid(hdmi, connector);
+}
+
+static const struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .attach = dw_hdmi_bridge_attach,
+ .detach = dw_hdmi_bridge_detach,
+ .atomic_check = dw_hdmi_bridge_atomic_check,
+ .atomic_get_output_bus_fmts = dw_hdmi_bridge_atomic_get_output_bus_fmts,
+ .atomic_get_input_bus_fmts = dw_hdmi_bridge_atomic_get_input_bus_fmts,
+ .atomic_enable = dw_hdmi_bridge_atomic_enable,
+ .atomic_disable = dw_hdmi_bridge_atomic_disable,
+ .mode_set = dw_hdmi_bridge_mode_set,
+ .mode_valid = dw_hdmi_bridge_mode_valid,
+ .detect = dw_hdmi_bridge_detect,
+ .get_edid = dw_hdmi_bridge_get_edid,
+};
+
+/* -----------------------------------------------------------------------------
+ * IRQ Handling
+ */
+
+static irqreturn_t dw_hdmi_i2c_irq(struct dw_hdmi *hdmi)
+{
+ struct dw_hdmi_i2c *i2c = hdmi->i2c;
+ unsigned int stat;
+
+ stat = hdmi_readb(hdmi, HDMI_IH_I2CM_STAT0);
+ if (!stat)
+ return IRQ_NONE;
+
+ hdmi_writeb(hdmi, stat, HDMI_IH_I2CM_STAT0);
+
+ i2c->stat = stat;
+
+ complete(&i2c->cmp);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t dw_hdmi_hardirq(int irq, void *dev_id)
+{
+ struct dw_hdmi *hdmi = dev_id;
+ u8 intr_stat;
+ irqreturn_t ret = IRQ_NONE;
+
+ if (hdmi->i2c)
+ ret = dw_hdmi_i2c_irq(hdmi);
+
+ intr_stat = hdmi_readb(hdmi, HDMI_IH_PHY_STAT0);
+ if (intr_stat) {
+ hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
+ return IRQ_WAKE_THREAD;
+ }
+
+ return ret;
+}
+
+void dw_hdmi_setup_rx_sense(struct dw_hdmi *hdmi, bool hpd, bool rx_sense)
+{
+ mutex_lock(&hdmi->mutex);
+
+ if (!hdmi->force) {
+ /*
+ * If the RX sense status indicates we're disconnected,
+ * clear the software rxsense status.
+ */
+ if (!rx_sense)
+ hdmi->rxsense = false;
+
+ /*
+ * Only set the software rxsense status when both
+ * rxsense and hpd indicates we're connected.
+ * This avoids what seems to be bad behaviour in
+ * at least iMX6S versions of the phy.
+ */
+ if (hpd)
+ hdmi->rxsense = true;
+
+ dw_hdmi_update_power(hdmi);
+ dw_hdmi_update_phy_mask(hdmi);
+ }
+ mutex_unlock(&hdmi->mutex);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_setup_rx_sense);
+
+static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
+{
+ struct dw_hdmi *hdmi = dev_id;
+ u8 intr_stat, phy_int_pol, phy_pol_mask, phy_stat;
+ enum drm_connector_status status = connector_status_unknown;
+
+ intr_stat = hdmi_readb(hdmi, HDMI_IH_PHY_STAT0);
+ phy_int_pol = hdmi_readb(hdmi, HDMI_PHY_POL0);
+ phy_stat = hdmi_readb(hdmi, HDMI_PHY_STAT0);
+
+ phy_pol_mask = 0;
+ if (intr_stat & HDMI_IH_PHY_STAT0_HPD)
+ phy_pol_mask |= HDMI_PHY_HPD;
+ if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE0)
+ phy_pol_mask |= HDMI_PHY_RX_SENSE0;
+ if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE1)
+ phy_pol_mask |= HDMI_PHY_RX_SENSE1;
+ if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE2)
+ phy_pol_mask |= HDMI_PHY_RX_SENSE2;
+ if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE3)
+ phy_pol_mask |= HDMI_PHY_RX_SENSE3;
+
+ if (phy_pol_mask)
+ hdmi_modb(hdmi, ~phy_int_pol, phy_pol_mask, HDMI_PHY_POL0);
+
+ /*
+ * RX sense tells us whether the TDMS transmitters are detecting
+ * load - in other words, there's something listening on the
+ * other end of the link. Use this to decide whether we should
+ * power on the phy as HPD may be toggled by the sink to merely
+ * ask the source to re-read the EDID.
+ */
+ if (intr_stat &
+ (HDMI_IH_PHY_STAT0_RX_SENSE | HDMI_IH_PHY_STAT0_HPD)) {
+ dw_hdmi_setup_rx_sense(hdmi,
+ phy_stat & HDMI_PHY_HPD,
+ phy_stat & HDMI_PHY_RX_SENSE);
+
+ if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) == 0) {
+ mutex_lock(&hdmi->cec_notifier_mutex);
+ cec_notifier_phys_addr_invalidate(hdmi->cec_notifier);
+ mutex_unlock(&hdmi->cec_notifier_mutex);
+ }
+
+ if (phy_stat & HDMI_PHY_HPD)
+ status = connector_status_connected;
+
+ if (!(phy_stat & (HDMI_PHY_HPD | HDMI_PHY_RX_SENSE)))
+ status = connector_status_disconnected;
+ }
+
+ if (status != connector_status_unknown) {
+ dev_dbg(hdmi->dev, "EVENT=%s\n",
+ status == connector_status_connected ?
+ "plugin" : "plugout");
+
+ if (hdmi->bridge.dev) {
+ drm_helper_hpd_irq_event(hdmi->bridge.dev);
+ drm_bridge_hpd_notify(&hdmi->bridge, status);
+ }
+ }
+
+ hdmi_writeb(hdmi, intr_stat, HDMI_IH_PHY_STAT0);
+ hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
+ HDMI_IH_MUTE_PHY_STAT0);
+
+ return IRQ_HANDLED;
+}
+
+static const struct dw_hdmi_phy_data dw_hdmi_phys[] = {
+ {
+ .type = DW_HDMI_PHY_DWC_HDMI_TX_PHY,
+ .name = "DWC HDMI TX PHY",
+ .gen = 1,
+ }, {
+ .type = DW_HDMI_PHY_DWC_MHL_PHY_HEAC,
+ .name = "DWC MHL PHY + HEAC PHY",
+ .gen = 2,
+ .has_svsret = true,
+ .configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
+ }, {
+ .type = DW_HDMI_PHY_DWC_MHL_PHY,
+ .name = "DWC MHL PHY",
+ .gen = 2,
+ .has_svsret = true,
+ .configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
+ }, {
+ .type = DW_HDMI_PHY_DWC_HDMI_3D_TX_PHY_HEAC,
+ .name = "DWC HDMI 3D TX PHY + HEAC PHY",
+ .gen = 2,
+ .configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
+ }, {
+ .type = DW_HDMI_PHY_DWC_HDMI_3D_TX_PHY,
+ .name = "DWC HDMI 3D TX PHY",
+ .gen = 2,
+ .configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
+ }, {
+ .type = DW_HDMI_PHY_DWC_HDMI20_TX_PHY,
+ .name = "DWC HDMI 2.0 TX PHY",
+ .gen = 2,
+ .has_svsret = true,
+ .configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
+ }, {
+ .type = DW_HDMI_PHY_VENDOR_PHY,
+ .name = "Vendor PHY",
+ }
+};
+
+static int dw_hdmi_detect_phy(struct dw_hdmi *hdmi)
+{
+ unsigned int i;
+ u8 phy_type;
+
+ phy_type = hdmi->plat_data->phy_force_vendor ?
+ DW_HDMI_PHY_VENDOR_PHY :
+ hdmi_readb(hdmi, HDMI_CONFIG2_ID);
+
+ if (phy_type == DW_HDMI_PHY_VENDOR_PHY) {
+ /* Vendor PHYs require support from the glue layer. */
+ if (!hdmi->plat_data->phy_ops || !hdmi->plat_data->phy_name) {
+ dev_err(hdmi->dev,
+ "Vendor HDMI PHY not supported by glue layer\n");
+ return -ENODEV;
+ }
+
+ hdmi->phy.ops = hdmi->plat_data->phy_ops;
+ hdmi->phy.data = hdmi->plat_data->phy_data;
+ hdmi->phy.name = hdmi->plat_data->phy_name;
+ return 0;
+ }
+
+ /* Synopsys PHYs are handled internally. */
+ for (i = 0; i < ARRAY_SIZE(dw_hdmi_phys); ++i) {
+ if (dw_hdmi_phys[i].type == phy_type) {
+ hdmi->phy.ops = &dw_hdmi_synopsys_phy_ops;
+ hdmi->phy.name = dw_hdmi_phys[i].name;
+ hdmi->phy.data = (void *)&dw_hdmi_phys[i];
+
+ if (!dw_hdmi_phys[i].configure &&
+ !hdmi->plat_data->configure_phy) {
+ dev_err(hdmi->dev, "%s requires platform support\n",
+ hdmi->phy.name);
+ return -ENODEV;
+ }
+
+ return 0;
+ }
+ }
+
+ dev_err(hdmi->dev, "Unsupported HDMI PHY type (%02x)\n", phy_type);
+ return -ENODEV;
+}
+
+static void dw_hdmi_cec_enable(struct dw_hdmi *hdmi)
+{
+ mutex_lock(&hdmi->mutex);
+ hdmi->mc_clkdis &= ~HDMI_MC_CLKDIS_CECCLK_DISABLE;
+ hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
+ mutex_unlock(&hdmi->mutex);
+}
+
+static void dw_hdmi_cec_disable(struct dw_hdmi *hdmi)
+{
+ mutex_lock(&hdmi->mutex);
+ hdmi->mc_clkdis |= HDMI_MC_CLKDIS_CECCLK_DISABLE;
+ hdmi_writeb(hdmi, hdmi->mc_clkdis, HDMI_MC_CLKDIS);
+ mutex_unlock(&hdmi->mutex);
+}
+
+static const struct dw_hdmi_cec_ops dw_hdmi_cec_ops = {
+ .write = hdmi_writeb,
+ .read = hdmi_readb,
+ .enable = dw_hdmi_cec_enable,
+ .disable = dw_hdmi_cec_disable,
+};
+
+static const struct regmap_config hdmi_regmap_8bit_config = {
+ .reg_bits = 32,
+ .val_bits = 8,
+ .reg_stride = 1,
+ .max_register = HDMI_I2CM_FS_SCL_LCNT_0_ADDR,
+};
+
+static const struct regmap_config hdmi_regmap_32bit_config = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+ .max_register = HDMI_I2CM_FS_SCL_LCNT_0_ADDR << 2,
+};
+
+static void dw_hdmi_init_hw(struct dw_hdmi *hdmi)
+{
+ initialize_hdmi_ih_mutes(hdmi);
+
+ /*
+ * Reset HDMI DDC I2C master controller and mute I2CM interrupts.
+ * Even if we are using a separate i2c adapter doing this doesn't
+ * hurt.
+ */
+ dw_hdmi_i2c_init(hdmi);
+
+ if (hdmi->phy.ops->setup_hpd)
+ hdmi->phy.ops->setup_hpd(hdmi, hdmi->phy.data);
+}
+
+/* -----------------------------------------------------------------------------
+ * Probe/remove API, used from platforms based on the DRM bridge API.
+ */
+
+static int dw_hdmi_parse_dt(struct dw_hdmi *hdmi)
+{
+ struct device_node *endpoint;
+ struct device_node *remote;
+
+ if (!hdmi->plat_data->output_port)
+ return 0;
+
+ endpoint = of_graph_get_endpoint_by_regs(hdmi->dev->of_node,
+ hdmi->plat_data->output_port,
+ -1);
+ if (!endpoint) {
+ /*
+ * On platforms whose bindings don't make the output port
+ * mandatory (such as Rockchip) the plat_data->output_port
+ * field isn't set, so it's safe to make this a fatal error.
+ */
+ dev_err(hdmi->dev, "Missing endpoint in port@%u\n",
+ hdmi->plat_data->output_port);
+ return -ENODEV;
+ }
+
+ remote = of_graph_get_remote_port_parent(endpoint);
+ of_node_put(endpoint);
+ if (!remote) {
+ dev_err(hdmi->dev, "Endpoint in port@%u unconnected\n",
+ hdmi->plat_data->output_port);
+ return -ENODEV;
+ }
+
+ if (!of_device_is_available(remote)) {
+ dev_err(hdmi->dev, "port@%u remote device is disabled\n",
+ hdmi->plat_data->output_port);
+ of_node_put(remote);
+ return -ENODEV;
+ }
+
+ hdmi->next_bridge = of_drm_find_bridge(remote);
+ of_node_put(remote);
+ if (!hdmi->next_bridge)
+ return -EPROBE_DEFER;
+
+ return 0;
+}
+
+struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
+ const struct dw_hdmi_plat_data *plat_data)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct platform_device_info pdevinfo;
+ struct device_node *ddc_node;
+ struct dw_hdmi_cec_data cec;
+ struct dw_hdmi *hdmi;
+ struct resource *iores = NULL;
+ int irq;
+ int ret;
+ u32 val = 1;
+ u8 prod_id0;
+ u8 prod_id1;
+ u8 config0;
+ u8 config3;
+
+ hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
+ if (!hdmi)
+ return ERR_PTR(-ENOMEM);
+
+ hdmi->plat_data = plat_data;
+ hdmi->dev = dev;
+ hdmi->sample_rate = 48000;
+ hdmi->channels = 2;
+ hdmi->disabled = true;
+ hdmi->rxsense = true;
+ hdmi->phy_mask = (u8)~(HDMI_PHY_HPD | HDMI_PHY_RX_SENSE);
+ hdmi->mc_clkdis = 0x7f;
+ hdmi->last_connector_result = connector_status_disconnected;
+
+ mutex_init(&hdmi->mutex);
+ mutex_init(&hdmi->audio_mutex);
+ mutex_init(&hdmi->cec_notifier_mutex);
+ spin_lock_init(&hdmi->audio_lock);
+
+ ret = dw_hdmi_parse_dt(hdmi);
+ if (ret < 0)
+ return ERR_PTR(ret);
+
+ ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
+ if (ddc_node) {
+ hdmi->ddc = of_get_i2c_adapter_by_node(ddc_node);
+ of_node_put(ddc_node);
+ if (!hdmi->ddc) {
+ dev_dbg(hdmi->dev, "failed to read ddc node\n");
+ return ERR_PTR(-EPROBE_DEFER);
+ }
+
+ } else {
+ dev_dbg(hdmi->dev, "no ddc property found\n");
+ }
+
+ if (!plat_data->regm) {
+ const struct regmap_config *reg_config;
+
+ of_property_read_u32(np, "reg-io-width", &val);
+ switch (val) {
+ case 4:
+ reg_config = &hdmi_regmap_32bit_config;
+ hdmi->reg_shift = 2;
+ break;
+ case 1:
+ reg_config = &hdmi_regmap_8bit_config;
+ break;
+ default:
+ dev_err(dev, "reg-io-width must be 1 or 4\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hdmi->regs = devm_ioremap_resource(dev, iores);
+ if (IS_ERR(hdmi->regs)) {
+ ret = PTR_ERR(hdmi->regs);
+ goto err_res;
+ }
+
+ hdmi->regm = devm_regmap_init_mmio(dev, hdmi->regs, reg_config);
+ if (IS_ERR(hdmi->regm)) {
+ dev_err(dev, "Failed to configure regmap\n");
+ ret = PTR_ERR(hdmi->regm);
+ goto err_res;
+ }
+ } else {
+ hdmi->regm = plat_data->regm;
+ }
+
+ hdmi->isfr_clk = devm_clk_get(hdmi->dev, "isfr");
+ if (IS_ERR(hdmi->isfr_clk)) {
+ ret = PTR_ERR(hdmi->isfr_clk);
+ dev_err(hdmi->dev, "Unable to get HDMI isfr clk: %d\n", ret);
+ goto err_res;
+ }
+
+ ret = clk_prepare_enable(hdmi->isfr_clk);
+ if (ret) {
+ dev_err(hdmi->dev, "Cannot enable HDMI isfr clock: %d\n", ret);
+ goto err_res;
+ }
+
+ hdmi->iahb_clk = devm_clk_get(hdmi->dev, "iahb");
+ if (IS_ERR(hdmi->iahb_clk)) {
+ ret = PTR_ERR(hdmi->iahb_clk);
+ dev_err(hdmi->dev, "Unable to get HDMI iahb clk: %d\n", ret);
+ goto err_isfr;
+ }
+
+ ret = clk_prepare_enable(hdmi->iahb_clk);
+ if (ret) {
+ dev_err(hdmi->dev, "Cannot enable HDMI iahb clock: %d\n", ret);
+ goto err_isfr;
+ }
+
+ hdmi->cec_clk = devm_clk_get(hdmi->dev, "cec");
+ if (PTR_ERR(hdmi->cec_clk) == -ENOENT) {
+ hdmi->cec_clk = NULL;
+ } else if (IS_ERR(hdmi->cec_clk)) {
+ ret = PTR_ERR(hdmi->cec_clk);
+ if (ret != -EPROBE_DEFER)
+ dev_err(hdmi->dev, "Cannot get HDMI cec clock: %d\n",
+ ret);
+
+ hdmi->cec_clk = NULL;
+ goto err_iahb;
+ } else {
+ ret = clk_prepare_enable(hdmi->cec_clk);
+ if (ret) {
+ dev_err(hdmi->dev, "Cannot enable HDMI cec clock: %d\n",
+ ret);
+ goto err_iahb;
+ }
+ }
+
+ /* Product and revision IDs */
+ hdmi->version = (hdmi_readb(hdmi, HDMI_DESIGN_ID) << 8)
+ | (hdmi_readb(hdmi, HDMI_REVISION_ID) << 0);
+ prod_id0 = hdmi_readb(hdmi, HDMI_PRODUCT_ID0);
+ prod_id1 = hdmi_readb(hdmi, HDMI_PRODUCT_ID1);
+
+ if (prod_id0 != HDMI_PRODUCT_ID0_HDMI_TX ||
+ (prod_id1 & ~HDMI_PRODUCT_ID1_HDCP) != HDMI_PRODUCT_ID1_HDMI_TX) {
+ dev_err(dev, "Unsupported HDMI controller (%04x:%02x:%02x)\n",
+ hdmi->version, prod_id0, prod_id1);
+ ret = -ENODEV;
+ goto err_iahb;
+ }
+
+ ret = dw_hdmi_detect_phy(hdmi);
+ if (ret < 0)
+ goto err_iahb;
+
+ dev_info(dev, "Detected HDMI TX controller v%x.%03x %s HDCP (%s)\n",
+ hdmi->version >> 12, hdmi->version & 0xfff,
+ prod_id1 & HDMI_PRODUCT_ID1_HDCP ? "with" : "without",
+ hdmi->phy.name);
+
+ dw_hdmi_init_hw(hdmi);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ ret = irq;
+ goto err_iahb;
+ }
+
+ ret = devm_request_threaded_irq(dev, irq, dw_hdmi_hardirq,
+ dw_hdmi_irq, IRQF_SHARED,
+ dev_name(dev), hdmi);
+ if (ret)
+ goto err_iahb;
+
+ /*
+ * To prevent overflows in HDMI_IH_FC_STAT2, set the clk regenerator
+ * N and cts values before enabling phy
+ */
+ hdmi_init_clk_regenerator(hdmi);
+
+ /* If DDC bus is not specified, try to register HDMI I2C bus */
+ if (!hdmi->ddc) {
+ /* Look for (optional) stuff related to unwedging */
+ hdmi->pinctrl = devm_pinctrl_get(dev);
+ if (!IS_ERR(hdmi->pinctrl)) {
+ hdmi->unwedge_state =
+ pinctrl_lookup_state(hdmi->pinctrl, "unwedge");
+ hdmi->default_state =
+ pinctrl_lookup_state(hdmi->pinctrl, "default");
+
+ if (IS_ERR(hdmi->default_state) ||
+ IS_ERR(hdmi->unwedge_state)) {
+ if (!IS_ERR(hdmi->unwedge_state))
+ dev_warn(dev,
+ "Unwedge requires default pinctrl\n");
+ hdmi->default_state = NULL;
+ hdmi->unwedge_state = NULL;
+ }
+ }
+
+ hdmi->ddc = dw_hdmi_i2c_adapter(hdmi);
+ if (IS_ERR(hdmi->ddc))
+ hdmi->ddc = NULL;
+ }
+
+ hdmi->bridge.driver_private = hdmi;
+ hdmi->bridge.funcs = &dw_hdmi_bridge_funcs;
+ hdmi->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID
+ | DRM_BRIDGE_OP_HPD;
+ hdmi->bridge.interlace_allowed = true;
+#ifdef CONFIG_OF
+ hdmi->bridge.of_node = pdev->dev.of_node;
+#endif
+
+ memset(&pdevinfo, 0, sizeof(pdevinfo));
+ pdevinfo.parent = dev;
+ pdevinfo.id = PLATFORM_DEVID_AUTO;
+
+ config0 = hdmi_readb(hdmi, HDMI_CONFIG0_ID);
+ config3 = hdmi_readb(hdmi, HDMI_CONFIG3_ID);
+
+ if (iores && config3 & HDMI_CONFIG3_AHBAUDDMA) {
+ struct dw_hdmi_audio_data audio;
+
+ audio.phys = iores->start;
+ audio.base = hdmi->regs;
+ audio.irq = irq;
+ audio.hdmi = hdmi;
+ audio.get_eld = hdmi_audio_get_eld;
+ hdmi->enable_audio = dw_hdmi_ahb_audio_enable;
+ hdmi->disable_audio = dw_hdmi_ahb_audio_disable;
+
+ pdevinfo.name = "dw-hdmi-ahb-audio";
+ pdevinfo.data = &audio;
+ pdevinfo.size_data = sizeof(audio);
+ pdevinfo.dma_mask = DMA_BIT_MASK(32);
+ hdmi->audio = platform_device_register_full(&pdevinfo);
+ } else if (config0 & HDMI_CONFIG0_I2S) {
+ struct dw_hdmi_i2s_audio_data audio;
+
+ audio.hdmi = hdmi;
+ audio.get_eld = hdmi_audio_get_eld;
+ audio.write = hdmi_writeb;
+ audio.read = hdmi_readb;
+ hdmi->enable_audio = dw_hdmi_i2s_audio_enable;
+ hdmi->disable_audio = dw_hdmi_i2s_audio_disable;
+
+ pdevinfo.name = "dw-hdmi-i2s-audio";
+ pdevinfo.data = &audio;
+ pdevinfo.size_data = sizeof(audio);
+ pdevinfo.dma_mask = DMA_BIT_MASK(32);
+ hdmi->audio = platform_device_register_full(&pdevinfo);
+ } else if (iores && config3 & HDMI_CONFIG3_GPAUD) {
+ struct dw_hdmi_audio_data audio;
+
+ audio.phys = iores->start;
+ audio.base = hdmi->regs;
+ audio.irq = irq;
+ audio.hdmi = hdmi;
+ audio.get_eld = hdmi_audio_get_eld;
+
+ hdmi->enable_audio = dw_hdmi_gp_audio_enable;
+ hdmi->disable_audio = dw_hdmi_gp_audio_disable;
+
+ pdevinfo.name = "dw-hdmi-gp-audio";
+ pdevinfo.id = PLATFORM_DEVID_NONE;
+ pdevinfo.data = &audio;
+ pdevinfo.size_data = sizeof(audio);
+ pdevinfo.dma_mask = DMA_BIT_MASK(32);
+ hdmi->audio = platform_device_register_full(&pdevinfo);
+ }
+
+ if (!plat_data->disable_cec && (config0 & HDMI_CONFIG0_CEC)) {
+ cec.hdmi = hdmi;
+ cec.ops = &dw_hdmi_cec_ops;
+ cec.irq = irq;
+
+ pdevinfo.name = "dw-hdmi-cec";
+ pdevinfo.data = &cec;
+ pdevinfo.size_data = sizeof(cec);
+ pdevinfo.dma_mask = 0;
+
+ hdmi->cec = platform_device_register_full(&pdevinfo);
+ }
+
+ drm_bridge_add(&hdmi->bridge);
+
+ return hdmi;
+
+err_iahb:
+ clk_disable_unprepare(hdmi->iahb_clk);
+ clk_disable_unprepare(hdmi->cec_clk);
+err_isfr:
+ clk_disable_unprepare(hdmi->isfr_clk);
+err_res:
+ i2c_put_adapter(hdmi->ddc);
+
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_probe);
+
+void dw_hdmi_remove(struct dw_hdmi *hdmi)
+{
+ drm_bridge_remove(&hdmi->bridge);
+
+ if (hdmi->audio && !IS_ERR(hdmi->audio))
+ platform_device_unregister(hdmi->audio);
+ if (!IS_ERR(hdmi->cec))
+ platform_device_unregister(hdmi->cec);
+
+ /* Disable all interrupts */
+ hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
+
+ clk_disable_unprepare(hdmi->iahb_clk);
+ clk_disable_unprepare(hdmi->isfr_clk);
+ clk_disable_unprepare(hdmi->cec_clk);
+
+ if (hdmi->i2c)
+ i2c_del_adapter(&hdmi->i2c->adap);
+ else
+ i2c_put_adapter(hdmi->ddc);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_remove);
+
+/* -----------------------------------------------------------------------------
+ * Bind/unbind API, used from platforms based on the component framework.
+ */
+struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
+ struct drm_encoder *encoder,
+ const struct dw_hdmi_plat_data *plat_data)
+{
+ struct dw_hdmi *hdmi;
+ int ret;
+
+ hdmi = dw_hdmi_probe(pdev, plat_data);
+ if (IS_ERR(hdmi))
+ return hdmi;
+
+ ret = drm_bridge_attach(encoder, &hdmi->bridge, NULL, 0);
+ if (ret) {
+ dw_hdmi_remove(hdmi);
+ return ERR_PTR(ret);
+ }
+
+ return hdmi;
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_bind);
+
+void dw_hdmi_unbind(struct dw_hdmi *hdmi)
+{
+ dw_hdmi_remove(hdmi);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_unbind);
+
+void dw_hdmi_resume(struct dw_hdmi *hdmi)
+{
+ dw_hdmi_init_hw(hdmi);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_resume);
+
+MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
+MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>");
+MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
+MODULE_AUTHOR("Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>");
+MODULE_DESCRIPTION("DW HDMI transmitter driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:dw-hdmi");
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h
new file mode 100644
index 000000000..af43a0414
--- /dev/null
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h
@@ -0,0 +1,1168 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2011 Freescale Semiconductor, Inc.
+ */
+
+#ifndef __DW_HDMI_H__
+#define __DW_HDMI_H__
+
+/* Identification Registers */
+#define HDMI_DESIGN_ID 0x0000
+#define HDMI_REVISION_ID 0x0001
+#define HDMI_PRODUCT_ID0 0x0002
+#define HDMI_PRODUCT_ID1 0x0003
+#define HDMI_CONFIG0_ID 0x0004
+#define HDMI_CONFIG1_ID 0x0005
+#define HDMI_CONFIG2_ID 0x0006
+#define HDMI_CONFIG3_ID 0x0007
+
+/* Interrupt Registers */
+#define HDMI_IH_FC_STAT0 0x0100
+#define HDMI_IH_FC_STAT1 0x0101
+#define HDMI_IH_FC_STAT2 0x0102
+#define HDMI_IH_AS_STAT0 0x0103
+#define HDMI_IH_PHY_STAT0 0x0104
+#define HDMI_IH_I2CM_STAT0 0x0105
+#define HDMI_IH_CEC_STAT0 0x0106
+#define HDMI_IH_VP_STAT0 0x0107
+#define HDMI_IH_I2CMPHY_STAT0 0x0108
+#define HDMI_IH_AHBDMAAUD_STAT0 0x0109
+
+#define HDMI_IH_MUTE_FC_STAT0 0x0180
+#define HDMI_IH_MUTE_FC_STAT1 0x0181
+#define HDMI_IH_MUTE_FC_STAT2 0x0182
+#define HDMI_IH_MUTE_AS_STAT0 0x0183
+#define HDMI_IH_MUTE_PHY_STAT0 0x0184
+#define HDMI_IH_MUTE_I2CM_STAT0 0x0185
+#define HDMI_IH_MUTE_CEC_STAT0 0x0186
+#define HDMI_IH_MUTE_VP_STAT0 0x0187
+#define HDMI_IH_MUTE_I2CMPHY_STAT0 0x0188
+#define HDMI_IH_MUTE_AHBDMAAUD_STAT0 0x0189
+#define HDMI_IH_MUTE 0x01FF
+
+/* Video Sample Registers */
+#define HDMI_TX_INVID0 0x0200
+#define HDMI_TX_INSTUFFING 0x0201
+#define HDMI_TX_GYDATA0 0x0202
+#define HDMI_TX_GYDATA1 0x0203
+#define HDMI_TX_RCRDATA0 0x0204
+#define HDMI_TX_RCRDATA1 0x0205
+#define HDMI_TX_BCBDATA0 0x0206
+#define HDMI_TX_BCBDATA1 0x0207
+
+/* Video Packetizer Registers */
+#define HDMI_VP_STATUS 0x0800
+#define HDMI_VP_PR_CD 0x0801
+#define HDMI_VP_STUFF 0x0802
+#define HDMI_VP_REMAP 0x0803
+#define HDMI_VP_CONF 0x0804
+#define HDMI_VP_STAT 0x0805
+#define HDMI_VP_INT 0x0806
+#define HDMI_VP_MASK 0x0807
+#define HDMI_VP_POL 0x0808
+
+/* Frame Composer Registers */
+#define HDMI_FC_INVIDCONF 0x1000
+#define HDMI_FC_INHACTV0 0x1001
+#define HDMI_FC_INHACTV1 0x1002
+#define HDMI_FC_INHBLANK0 0x1003
+#define HDMI_FC_INHBLANK1 0x1004
+#define HDMI_FC_INVACTV0 0x1005
+#define HDMI_FC_INVACTV1 0x1006
+#define HDMI_FC_INVBLANK 0x1007
+#define HDMI_FC_HSYNCINDELAY0 0x1008
+#define HDMI_FC_HSYNCINDELAY1 0x1009
+#define HDMI_FC_HSYNCINWIDTH0 0x100A
+#define HDMI_FC_HSYNCINWIDTH1 0x100B
+#define HDMI_FC_VSYNCINDELAY 0x100C
+#define HDMI_FC_VSYNCINWIDTH 0x100D
+#define HDMI_FC_INFREQ0 0x100E
+#define HDMI_FC_INFREQ1 0x100F
+#define HDMI_FC_INFREQ2 0x1010
+#define HDMI_FC_CTRLDUR 0x1011
+#define HDMI_FC_EXCTRLDUR 0x1012
+#define HDMI_FC_EXCTRLSPAC 0x1013
+#define HDMI_FC_CH0PREAM 0x1014
+#define HDMI_FC_CH1PREAM 0x1015
+#define HDMI_FC_CH2PREAM 0x1016
+#define HDMI_FC_AVICONF3 0x1017
+#define HDMI_FC_GCP 0x1018
+#define HDMI_FC_AVICONF0 0x1019
+#define HDMI_FC_AVICONF1 0x101A
+#define HDMI_FC_AVICONF2 0x101B
+#define HDMI_FC_AVIVID 0x101C
+#define HDMI_FC_AVIETB0 0x101D
+#define HDMI_FC_AVIETB1 0x101E
+#define HDMI_FC_AVISBB0 0x101F
+#define HDMI_FC_AVISBB1 0x1020
+#define HDMI_FC_AVIELB0 0x1021
+#define HDMI_FC_AVIELB1 0x1022
+#define HDMI_FC_AVISRB0 0x1023
+#define HDMI_FC_AVISRB1 0x1024
+#define HDMI_FC_AUDICONF0 0x1025
+#define HDMI_FC_AUDICONF1 0x1026
+#define HDMI_FC_AUDICONF2 0x1027
+#define HDMI_FC_AUDICONF3 0x1028
+#define HDMI_FC_VSDIEEEID0 0x1029
+#define HDMI_FC_VSDSIZE 0x102A
+#define HDMI_FC_VSDIEEEID1 0x1030
+#define HDMI_FC_VSDIEEEID2 0x1031
+#define HDMI_FC_VSDPAYLOAD0 0x1032
+#define HDMI_FC_VSDPAYLOAD1 0x1033
+#define HDMI_FC_VSDPAYLOAD2 0x1034
+#define HDMI_FC_VSDPAYLOAD3 0x1035
+#define HDMI_FC_VSDPAYLOAD4 0x1036
+#define HDMI_FC_VSDPAYLOAD5 0x1037
+#define HDMI_FC_VSDPAYLOAD6 0x1038
+#define HDMI_FC_VSDPAYLOAD7 0x1039
+#define HDMI_FC_VSDPAYLOAD8 0x103A
+#define HDMI_FC_VSDPAYLOAD9 0x103B
+#define HDMI_FC_VSDPAYLOAD10 0x103C
+#define HDMI_FC_VSDPAYLOAD11 0x103D
+#define HDMI_FC_VSDPAYLOAD12 0x103E
+#define HDMI_FC_VSDPAYLOAD13 0x103F
+#define HDMI_FC_VSDPAYLOAD14 0x1040
+#define HDMI_FC_VSDPAYLOAD15 0x1041
+#define HDMI_FC_VSDPAYLOAD16 0x1042
+#define HDMI_FC_VSDPAYLOAD17 0x1043
+#define HDMI_FC_VSDPAYLOAD18 0x1044
+#define HDMI_FC_VSDPAYLOAD19 0x1045
+#define HDMI_FC_VSDPAYLOAD20 0x1046
+#define HDMI_FC_VSDPAYLOAD21 0x1047
+#define HDMI_FC_VSDPAYLOAD22 0x1048
+#define HDMI_FC_VSDPAYLOAD23 0x1049
+#define HDMI_FC_SPDVENDORNAME0 0x104A
+#define HDMI_FC_SPDVENDORNAME1 0x104B
+#define HDMI_FC_SPDVENDORNAME2 0x104C
+#define HDMI_FC_SPDVENDORNAME3 0x104D
+#define HDMI_FC_SPDVENDORNAME4 0x104E
+#define HDMI_FC_SPDVENDORNAME5 0x104F
+#define HDMI_FC_SPDVENDORNAME6 0x1050
+#define HDMI_FC_SPDVENDORNAME7 0x1051
+#define HDMI_FC_SDPPRODUCTNAME0 0x1052
+#define HDMI_FC_SDPPRODUCTNAME1 0x1053
+#define HDMI_FC_SDPPRODUCTNAME2 0x1054
+#define HDMI_FC_SDPPRODUCTNAME3 0x1055
+#define HDMI_FC_SDPPRODUCTNAME4 0x1056
+#define HDMI_FC_SDPPRODUCTNAME5 0x1057
+#define HDMI_FC_SDPPRODUCTNAME6 0x1058
+#define HDMI_FC_SDPPRODUCTNAME7 0x1059
+#define HDMI_FC_SDPPRODUCTNAME8 0x105A
+#define HDMI_FC_SDPPRODUCTNAME9 0x105B
+#define HDMI_FC_SDPPRODUCTNAME10 0x105C
+#define HDMI_FC_SDPPRODUCTNAME11 0x105D
+#define HDMI_FC_SDPPRODUCTNAME12 0x105E
+#define HDMI_FC_SDPPRODUCTNAME13 0x105F
+#define HDMI_FC_SDPPRODUCTNAME14 0x1060
+#define HDMI_FC_SPDPRODUCTNAME15 0x1061
+#define HDMI_FC_SPDDEVICEINF 0x1062
+#define HDMI_FC_AUDSCONF 0x1063
+#define HDMI_FC_AUDSSTAT 0x1064
+#define HDMI_FC_AUDSV 0x1065
+#define HDMI_FC_AUDSU 0x1066
+#define HDMI_FC_AUDSCHNLS0 0x1067
+#define HDMI_FC_AUDSCHNLS1 0x1068
+#define HDMI_FC_AUDSCHNLS2 0x1069
+#define HDMI_FC_AUDSCHNLS3 0x106A
+#define HDMI_FC_AUDSCHNLS4 0x106B
+#define HDMI_FC_AUDSCHNLS5 0x106C
+#define HDMI_FC_AUDSCHNLS6 0x106D
+#define HDMI_FC_AUDSCHNLS7 0x106E
+#define HDMI_FC_AUDSCHNLS8 0x106F
+#define HDMI_FC_DATACH0FILL 0x1070
+#define HDMI_FC_DATACH1FILL 0x1071
+#define HDMI_FC_DATACH2FILL 0x1072
+#define HDMI_FC_CTRLQHIGH 0x1073
+#define HDMI_FC_CTRLQLOW 0x1074
+#define HDMI_FC_ACP0 0x1075
+#define HDMI_FC_ACP28 0x1076
+#define HDMI_FC_ACP27 0x1077
+#define HDMI_FC_ACP26 0x1078
+#define HDMI_FC_ACP25 0x1079
+#define HDMI_FC_ACP24 0x107A
+#define HDMI_FC_ACP23 0x107B
+#define HDMI_FC_ACP22 0x107C
+#define HDMI_FC_ACP21 0x107D
+#define HDMI_FC_ACP20 0x107E
+#define HDMI_FC_ACP19 0x107F
+#define HDMI_FC_ACP18 0x1080
+#define HDMI_FC_ACP17 0x1081
+#define HDMI_FC_ACP16 0x1082
+#define HDMI_FC_ACP15 0x1083
+#define HDMI_FC_ACP14 0x1084
+#define HDMI_FC_ACP13 0x1085
+#define HDMI_FC_ACP12 0x1086
+#define HDMI_FC_ACP11 0x1087
+#define HDMI_FC_ACP10 0x1088
+#define HDMI_FC_ACP9 0x1089
+#define HDMI_FC_ACP8 0x108A
+#define HDMI_FC_ACP7 0x108B
+#define HDMI_FC_ACP6 0x108C
+#define HDMI_FC_ACP5 0x108D
+#define HDMI_FC_ACP4 0x108E
+#define HDMI_FC_ACP3 0x108F
+#define HDMI_FC_ACP2 0x1090
+#define HDMI_FC_ACP1 0x1091
+#define HDMI_FC_ISCR1_0 0x1092
+#define HDMI_FC_ISCR1_16 0x1093
+#define HDMI_FC_ISCR1_15 0x1094
+#define HDMI_FC_ISCR1_14 0x1095
+#define HDMI_FC_ISCR1_13 0x1096
+#define HDMI_FC_ISCR1_12 0x1097
+#define HDMI_FC_ISCR1_11 0x1098
+#define HDMI_FC_ISCR1_10 0x1099
+#define HDMI_FC_ISCR1_9 0x109A
+#define HDMI_FC_ISCR1_8 0x109B
+#define HDMI_FC_ISCR1_7 0x109C
+#define HDMI_FC_ISCR1_6 0x109D
+#define HDMI_FC_ISCR1_5 0x109E
+#define HDMI_FC_ISCR1_4 0x109F
+#define HDMI_FC_ISCR1_3 0x10A0
+#define HDMI_FC_ISCR1_2 0x10A1
+#define HDMI_FC_ISCR1_1 0x10A2
+#define HDMI_FC_ISCR2_15 0x10A3
+#define HDMI_FC_ISCR2_14 0x10A4
+#define HDMI_FC_ISCR2_13 0x10A5
+#define HDMI_FC_ISCR2_12 0x10A6
+#define HDMI_FC_ISCR2_11 0x10A7
+#define HDMI_FC_ISCR2_10 0x10A8
+#define HDMI_FC_ISCR2_9 0x10A9
+#define HDMI_FC_ISCR2_8 0x10AA
+#define HDMI_FC_ISCR2_7 0x10AB
+#define HDMI_FC_ISCR2_6 0x10AC
+#define HDMI_FC_ISCR2_5 0x10AD
+#define HDMI_FC_ISCR2_4 0x10AE
+#define HDMI_FC_ISCR2_3 0x10AF
+#define HDMI_FC_ISCR2_2 0x10B0
+#define HDMI_FC_ISCR2_1 0x10B1
+#define HDMI_FC_ISCR2_0 0x10B2
+#define HDMI_FC_DATAUTO0 0x10B3
+#define HDMI_FC_DATAUTO1 0x10B4
+#define HDMI_FC_DATAUTO2 0x10B5
+#define HDMI_FC_DATMAN 0x10B6
+#define HDMI_FC_DATAUTO3 0x10B7
+#define HDMI_FC_RDRB0 0x10B8
+#define HDMI_FC_RDRB1 0x10B9
+#define HDMI_FC_RDRB2 0x10BA
+#define HDMI_FC_RDRB3 0x10BB
+#define HDMI_FC_RDRB4 0x10BC
+#define HDMI_FC_RDRB5 0x10BD
+#define HDMI_FC_RDRB6 0x10BE
+#define HDMI_FC_RDRB7 0x10BF
+#define HDMI_FC_STAT0 0x10D0
+#define HDMI_FC_INT0 0x10D1
+#define HDMI_FC_MASK0 0x10D2
+#define HDMI_FC_POL0 0x10D3
+#define HDMI_FC_STAT1 0x10D4
+#define HDMI_FC_INT1 0x10D5
+#define HDMI_FC_MASK1 0x10D6
+#define HDMI_FC_POL1 0x10D7
+#define HDMI_FC_STAT2 0x10D8
+#define HDMI_FC_INT2 0x10D9
+#define HDMI_FC_MASK2 0x10DA
+#define HDMI_FC_POL2 0x10DB
+#define HDMI_FC_PRCONF 0x10E0
+#define HDMI_FC_SCRAMBLER_CTRL 0x10E1
+#define HDMI_FC_PACKET_TX_EN 0x10E3
+
+#define HDMI_FC_GMD_STAT 0x1100
+#define HDMI_FC_GMD_EN 0x1101
+#define HDMI_FC_GMD_UP 0x1102
+#define HDMI_FC_GMD_CONF 0x1103
+#define HDMI_FC_GMD_HB 0x1104
+#define HDMI_FC_GMD_PB0 0x1105
+#define HDMI_FC_GMD_PB1 0x1106
+#define HDMI_FC_GMD_PB2 0x1107
+#define HDMI_FC_GMD_PB3 0x1108
+#define HDMI_FC_GMD_PB4 0x1109
+#define HDMI_FC_GMD_PB5 0x110A
+#define HDMI_FC_GMD_PB6 0x110B
+#define HDMI_FC_GMD_PB7 0x110C
+#define HDMI_FC_GMD_PB8 0x110D
+#define HDMI_FC_GMD_PB9 0x110E
+#define HDMI_FC_GMD_PB10 0x110F
+#define HDMI_FC_GMD_PB11 0x1110
+#define HDMI_FC_GMD_PB12 0x1111
+#define HDMI_FC_GMD_PB13 0x1112
+#define HDMI_FC_GMD_PB14 0x1113
+#define HDMI_FC_GMD_PB15 0x1114
+#define HDMI_FC_GMD_PB16 0x1115
+#define HDMI_FC_GMD_PB17 0x1116
+#define HDMI_FC_GMD_PB18 0x1117
+#define HDMI_FC_GMD_PB19 0x1118
+#define HDMI_FC_GMD_PB20 0x1119
+#define HDMI_FC_GMD_PB21 0x111A
+#define HDMI_FC_GMD_PB22 0x111B
+#define HDMI_FC_GMD_PB23 0x111C
+#define HDMI_FC_GMD_PB24 0x111D
+#define HDMI_FC_GMD_PB25 0x111E
+#define HDMI_FC_GMD_PB26 0x111F
+#define HDMI_FC_GMD_PB27 0x1120
+
+#define HDMI_FC_DRM_UP 0x1167
+#define HDMI_FC_DRM_HB0 0x1168
+#define HDMI_FC_DRM_HB1 0x1169
+#define HDMI_FC_DRM_PB0 0x116A
+#define HDMI_FC_DRM_PB1 0x116B
+#define HDMI_FC_DRM_PB2 0x116C
+#define HDMI_FC_DRM_PB3 0x116D
+#define HDMI_FC_DRM_PB4 0x116E
+#define HDMI_FC_DRM_PB5 0x116F
+#define HDMI_FC_DRM_PB6 0x1170
+#define HDMI_FC_DRM_PB7 0x1171
+#define HDMI_FC_DRM_PB8 0x1172
+#define HDMI_FC_DRM_PB9 0x1173
+#define HDMI_FC_DRM_PB10 0x1174
+#define HDMI_FC_DRM_PB11 0x1175
+#define HDMI_FC_DRM_PB12 0x1176
+#define HDMI_FC_DRM_PB13 0x1177
+#define HDMI_FC_DRM_PB14 0x1178
+#define HDMI_FC_DRM_PB15 0x1179
+#define HDMI_FC_DRM_PB16 0x117A
+#define HDMI_FC_DRM_PB17 0x117B
+#define HDMI_FC_DRM_PB18 0x117C
+#define HDMI_FC_DRM_PB19 0x117D
+#define HDMI_FC_DRM_PB20 0x117E
+#define HDMI_FC_DRM_PB21 0x117F
+#define HDMI_FC_DRM_PB22 0x1180
+#define HDMI_FC_DRM_PB23 0x1181
+#define HDMI_FC_DRM_PB24 0x1182
+#define HDMI_FC_DRM_PB25 0x1183
+#define HDMI_FC_DRM_PB26 0x1184
+
+#define HDMI_FC_DBGFORCE 0x1200
+#define HDMI_FC_DBGAUD0CH0 0x1201
+#define HDMI_FC_DBGAUD1CH0 0x1202
+#define HDMI_FC_DBGAUD2CH0 0x1203
+#define HDMI_FC_DBGAUD0CH1 0x1204
+#define HDMI_FC_DBGAUD1CH1 0x1205
+#define HDMI_FC_DBGAUD2CH1 0x1206
+#define HDMI_FC_DBGAUD0CH2 0x1207
+#define HDMI_FC_DBGAUD1CH2 0x1208
+#define HDMI_FC_DBGAUD2CH2 0x1209
+#define HDMI_FC_DBGAUD0CH3 0x120A
+#define HDMI_FC_DBGAUD1CH3 0x120B
+#define HDMI_FC_DBGAUD2CH3 0x120C
+#define HDMI_FC_DBGAUD0CH4 0x120D
+#define HDMI_FC_DBGAUD1CH4 0x120E
+#define HDMI_FC_DBGAUD2CH4 0x120F
+#define HDMI_FC_DBGAUD0CH5 0x1210
+#define HDMI_FC_DBGAUD1CH5 0x1211
+#define HDMI_FC_DBGAUD2CH5 0x1212
+#define HDMI_FC_DBGAUD0CH6 0x1213
+#define HDMI_FC_DBGAUD1CH6 0x1214
+#define HDMI_FC_DBGAUD2CH6 0x1215
+#define HDMI_FC_DBGAUD0CH7 0x1216
+#define HDMI_FC_DBGAUD1CH7 0x1217
+#define HDMI_FC_DBGAUD2CH7 0x1218
+#define HDMI_FC_DBGTMDS0 0x1219
+#define HDMI_FC_DBGTMDS1 0x121A
+#define HDMI_FC_DBGTMDS2 0x121B
+
+/* HDMI Source PHY Registers */
+#define HDMI_PHY_CONF0 0x3000
+#define HDMI_PHY_TST0 0x3001
+#define HDMI_PHY_TST1 0x3002
+#define HDMI_PHY_TST2 0x3003
+#define HDMI_PHY_STAT0 0x3004
+#define HDMI_PHY_INT0 0x3005
+#define HDMI_PHY_MASK0 0x3006
+#define HDMI_PHY_POL0 0x3007
+
+/* HDMI Master PHY Registers */
+#define HDMI_PHY_I2CM_SLAVE_ADDR 0x3020
+#define HDMI_PHY_I2CM_ADDRESS_ADDR 0x3021
+#define HDMI_PHY_I2CM_DATAO_1_ADDR 0x3022
+#define HDMI_PHY_I2CM_DATAO_0_ADDR 0x3023
+#define HDMI_PHY_I2CM_DATAI_1_ADDR 0x3024
+#define HDMI_PHY_I2CM_DATAI_0_ADDR 0x3025
+#define HDMI_PHY_I2CM_OPERATION_ADDR 0x3026
+#define HDMI_PHY_I2CM_INT_ADDR 0x3027
+#define HDMI_PHY_I2CM_CTLINT_ADDR 0x3028
+#define HDMI_PHY_I2CM_DIV_ADDR 0x3029
+#define HDMI_PHY_I2CM_SOFTRSTZ_ADDR 0x302a
+#define HDMI_PHY_I2CM_SS_SCL_HCNT_1_ADDR 0x302b
+#define HDMI_PHY_I2CM_SS_SCL_HCNT_0_ADDR 0x302c
+#define HDMI_PHY_I2CM_SS_SCL_LCNT_1_ADDR 0x302d
+#define HDMI_PHY_I2CM_SS_SCL_LCNT_0_ADDR 0x302e
+#define HDMI_PHY_I2CM_FS_SCL_HCNT_1_ADDR 0x302f
+#define HDMI_PHY_I2CM_FS_SCL_HCNT_0_ADDR 0x3030
+#define HDMI_PHY_I2CM_FS_SCL_LCNT_1_ADDR 0x3031
+#define HDMI_PHY_I2CM_FS_SCL_LCNT_0_ADDR 0x3032
+
+/* Audio Sampler Registers */
+#define HDMI_AUD_CONF0 0x3100
+#define HDMI_AUD_CONF1 0x3101
+#define HDMI_AUD_INT 0x3102
+#define HDMI_AUD_CONF2 0x3103
+#define HDMI_AUD_N1 0x3200
+#define HDMI_AUD_N2 0x3201
+#define HDMI_AUD_N3 0x3202
+#define HDMI_AUD_CTS1 0x3203
+#define HDMI_AUD_CTS2 0x3204
+#define HDMI_AUD_CTS3 0x3205
+#define HDMI_AUD_INPUTCLKFS 0x3206
+#define HDMI_AUD_SPDIFINT 0x3302
+#define HDMI_AUD_CONF0_HBR 0x3400
+#define HDMI_AUD_HBR_STATUS 0x3401
+#define HDMI_AUD_HBR_INT 0x3402
+#define HDMI_AUD_HBR_POL 0x3403
+#define HDMI_AUD_HBR_MASK 0x3404
+
+/*
+ * Generic Parallel Audio Interface Registers
+ * Not used as GPAUD interface is not enabled in hw
+ */
+#define HDMI_GP_CONF0 0x3500
+#define HDMI_GP_CONF1 0x3501
+#define HDMI_GP_CONF2 0x3502
+#define HDMI_GP_STAT 0x3503
+#define HDMI_GP_INT 0x3504
+#define HDMI_GP_MASK 0x3505
+#define HDMI_GP_POL 0x3506
+
+/* Audio DMA Registers */
+#define HDMI_AHB_DMA_CONF0 0x3600
+#define HDMI_AHB_DMA_START 0x3601
+#define HDMI_AHB_DMA_STOP 0x3602
+#define HDMI_AHB_DMA_THRSLD 0x3603
+#define HDMI_AHB_DMA_STRADDR0 0x3604
+#define HDMI_AHB_DMA_STRADDR1 0x3605
+#define HDMI_AHB_DMA_STRADDR2 0x3606
+#define HDMI_AHB_DMA_STRADDR3 0x3607
+#define HDMI_AHB_DMA_STPADDR0 0x3608
+#define HDMI_AHB_DMA_STPADDR1 0x3609
+#define HDMI_AHB_DMA_STPADDR2 0x360a
+#define HDMI_AHB_DMA_STPADDR3 0x360b
+#define HDMI_AHB_DMA_BSTADDR0 0x360c
+#define HDMI_AHB_DMA_BSTADDR1 0x360d
+#define HDMI_AHB_DMA_BSTADDR2 0x360e
+#define HDMI_AHB_DMA_BSTADDR3 0x360f
+#define HDMI_AHB_DMA_MBLENGTH0 0x3610
+#define HDMI_AHB_DMA_MBLENGTH1 0x3611
+#define HDMI_AHB_DMA_STAT 0x3612
+#define HDMI_AHB_DMA_INT 0x3613
+#define HDMI_AHB_DMA_MASK 0x3614
+#define HDMI_AHB_DMA_POL 0x3615
+#define HDMI_AHB_DMA_CONF1 0x3616
+#define HDMI_AHB_DMA_BUFFSTAT 0x3617
+#define HDMI_AHB_DMA_BUFFINT 0x3618
+#define HDMI_AHB_DMA_BUFFMASK 0x3619
+#define HDMI_AHB_DMA_BUFFPOL 0x361a
+
+/* Main Controller Registers */
+#define HDMI_MC_SFRDIV 0x4000
+#define HDMI_MC_CLKDIS 0x4001
+#define HDMI_MC_SWRSTZ 0x4002
+#define HDMI_MC_OPCTRL 0x4003
+#define HDMI_MC_FLOWCTRL 0x4004
+#define HDMI_MC_PHYRSTZ 0x4005
+#define HDMI_MC_LOCKONCLOCK 0x4006
+#define HDMI_MC_HEACPHY_RST 0x4007
+
+/* Color Space Converter Registers */
+#define HDMI_CSC_CFG 0x4100
+#define HDMI_CSC_SCALE 0x4101
+#define HDMI_CSC_COEF_A1_MSB 0x4102
+#define HDMI_CSC_COEF_A1_LSB 0x4103
+#define HDMI_CSC_COEF_A2_MSB 0x4104
+#define HDMI_CSC_COEF_A2_LSB 0x4105
+#define HDMI_CSC_COEF_A3_MSB 0x4106
+#define HDMI_CSC_COEF_A3_LSB 0x4107
+#define HDMI_CSC_COEF_A4_MSB 0x4108
+#define HDMI_CSC_COEF_A4_LSB 0x4109
+#define HDMI_CSC_COEF_B1_MSB 0x410A
+#define HDMI_CSC_COEF_B1_LSB 0x410B
+#define HDMI_CSC_COEF_B2_MSB 0x410C
+#define HDMI_CSC_COEF_B2_LSB 0x410D
+#define HDMI_CSC_COEF_B3_MSB 0x410E
+#define HDMI_CSC_COEF_B3_LSB 0x410F
+#define HDMI_CSC_COEF_B4_MSB 0x4110
+#define HDMI_CSC_COEF_B4_LSB 0x4111
+#define HDMI_CSC_COEF_C1_MSB 0x4112
+#define HDMI_CSC_COEF_C1_LSB 0x4113
+#define HDMI_CSC_COEF_C2_MSB 0x4114
+#define HDMI_CSC_COEF_C2_LSB 0x4115
+#define HDMI_CSC_COEF_C3_MSB 0x4116
+#define HDMI_CSC_COEF_C3_LSB 0x4117
+#define HDMI_CSC_COEF_C4_MSB 0x4118
+#define HDMI_CSC_COEF_C4_LSB 0x4119
+
+/* HDCP Encryption Engine Registers */
+#define HDMI_A_HDCPCFG0 0x5000
+#define HDMI_A_HDCPCFG1 0x5001
+#define HDMI_A_HDCPOBS0 0x5002
+#define HDMI_A_HDCPOBS1 0x5003
+#define HDMI_A_HDCPOBS2 0x5004
+#define HDMI_A_HDCPOBS3 0x5005
+#define HDMI_A_APIINTCLR 0x5006
+#define HDMI_A_APIINTSTAT 0x5007
+#define HDMI_A_APIINTMSK 0x5008
+#define HDMI_A_VIDPOLCFG 0x5009
+#define HDMI_A_OESSWCFG 0x500A
+#define HDMI_A_TIMER1SETUP0 0x500B
+#define HDMI_A_TIMER1SETUP1 0x500C
+#define HDMI_A_TIMER2SETUP0 0x500D
+#define HDMI_A_TIMER2SETUP1 0x500E
+#define HDMI_A_100MSCFG 0x500F
+#define HDMI_A_2SCFG0 0x5010
+#define HDMI_A_2SCFG1 0x5011
+#define HDMI_A_5SCFG0 0x5012
+#define HDMI_A_5SCFG1 0x5013
+#define HDMI_A_SRMVERLSB 0x5014
+#define HDMI_A_SRMVERMSB 0x5015
+#define HDMI_A_SRMCTRL 0x5016
+#define HDMI_A_SFRSETUP 0x5017
+#define HDMI_A_I2CHSETUP 0x5018
+#define HDMI_A_INTSETUP 0x5019
+#define HDMI_A_PRESETUP 0x501A
+#define HDMI_A_SRM_BASE 0x5020
+
+/* I2C Master Registers (E-DDC) */
+#define HDMI_I2CM_SLAVE 0x7E00
+#define HDMI_I2CM_ADDRESS 0x7E01
+#define HDMI_I2CM_DATAO 0x7E02
+#define HDMI_I2CM_DATAI 0x7E03
+#define HDMI_I2CM_OPERATION 0x7E04
+#define HDMI_I2CM_INT 0x7E05
+#define HDMI_I2CM_CTLINT 0x7E06
+#define HDMI_I2CM_DIV 0x7E07
+#define HDMI_I2CM_SEGADDR 0x7E08
+#define HDMI_I2CM_SOFTRSTZ 0x7E09
+#define HDMI_I2CM_SEGPTR 0x7E0A
+#define HDMI_I2CM_SS_SCL_HCNT_1_ADDR 0x7E0B
+#define HDMI_I2CM_SS_SCL_HCNT_0_ADDR 0x7E0C
+#define HDMI_I2CM_SS_SCL_LCNT_1_ADDR 0x7E0D
+#define HDMI_I2CM_SS_SCL_LCNT_0_ADDR 0x7E0E
+#define HDMI_I2CM_FS_SCL_HCNT_1_ADDR 0x7E0F
+#define HDMI_I2CM_FS_SCL_HCNT_0_ADDR 0x7E10
+#define HDMI_I2CM_FS_SCL_LCNT_1_ADDR 0x7E11
+#define HDMI_I2CM_FS_SCL_LCNT_0_ADDR 0x7E12
+
+enum {
+/* PRODUCT_ID0 field values */
+ HDMI_PRODUCT_ID0_HDMI_TX = 0xa0,
+
+/* PRODUCT_ID1 field values */
+ HDMI_PRODUCT_ID1_HDCP = 0xc0,
+ HDMI_PRODUCT_ID1_HDMI_RX = 0x02,
+ HDMI_PRODUCT_ID1_HDMI_TX = 0x01,
+
+/* CONFIG0_ID field values */
+ HDMI_CONFIG0_I2S = 0x10,
+ HDMI_CONFIG0_CEC = 0x02,
+
+/* CONFIG1_ID field values */
+ HDMI_CONFIG1_AHB = 0x01,
+
+/* CONFIG3_ID field values */
+ HDMI_CONFIG3_AHBAUDDMA = 0x02,
+ HDMI_CONFIG3_GPAUD = 0x01,
+
+/* IH_FC_INT2 field values */
+ HDMI_IH_FC_INT2_OVERFLOW_MASK = 0x03,
+ HDMI_IH_FC_INT2_LOW_PRIORITY_OVERFLOW = 0x02,
+ HDMI_IH_FC_INT2_HIGH_PRIORITY_OVERFLOW = 0x01,
+
+/* IH_FC_STAT2 field values */
+ HDMI_IH_FC_STAT2_OVERFLOW_MASK = 0x03,
+ HDMI_IH_FC_STAT2_LOW_PRIORITY_OVERFLOW = 0x02,
+ HDMI_IH_FC_STAT2_HIGH_PRIORITY_OVERFLOW = 0x01,
+
+/* IH_PHY_STAT0 field values */
+ HDMI_IH_PHY_STAT0_RX_SENSE3 = 0x20,
+ HDMI_IH_PHY_STAT0_RX_SENSE2 = 0x10,
+ HDMI_IH_PHY_STAT0_RX_SENSE1 = 0x8,
+ HDMI_IH_PHY_STAT0_RX_SENSE0 = 0x4,
+ HDMI_IH_PHY_STAT0_TX_PHY_LOCK = 0x2,
+ HDMI_IH_PHY_STAT0_HPD = 0x1,
+
+/* IH_I2CM_STAT0 and IH_MUTE_I2CM_STAT0 field values */
+ HDMI_IH_I2CM_STAT0_DONE = 0x2,
+ HDMI_IH_I2CM_STAT0_ERROR = 0x1,
+
+/* IH_MUTE_I2CMPHY_STAT0 field values */
+ HDMI_IH_MUTE_I2CMPHY_STAT0_I2CMPHYDONE = 0x2,
+ HDMI_IH_MUTE_I2CMPHY_STAT0_I2CMPHYERROR = 0x1,
+
+/* IH_AHBDMAAUD_STAT0 field values */
+ HDMI_IH_AHBDMAAUD_STAT0_ERROR = 0x20,
+ HDMI_IH_AHBDMAAUD_STAT0_LOST = 0x10,
+ HDMI_IH_AHBDMAAUD_STAT0_RETRY = 0x08,
+ HDMI_IH_AHBDMAAUD_STAT0_DONE = 0x04,
+ HDMI_IH_AHBDMAAUD_STAT0_BUFFFULL = 0x02,
+ HDMI_IH_AHBDMAAUD_STAT0_BUFFEMPTY = 0x01,
+
+/* IH_MUTE_FC_STAT2 field values */
+ HDMI_IH_MUTE_FC_STAT2_OVERFLOW_MASK = 0x03,
+ HDMI_IH_MUTE_FC_STAT2_LOW_PRIORITY_OVERFLOW = 0x02,
+ HDMI_IH_MUTE_FC_STAT2_HIGH_PRIORITY_OVERFLOW = 0x01,
+
+/* IH_MUTE_AHBDMAAUD_STAT0 field values */
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_ERROR = 0x20,
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_LOST = 0x10,
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_RETRY = 0x08,
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_DONE = 0x04,
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_BUFFFULL = 0x02,
+ HDMI_IH_MUTE_AHBDMAAUD_STAT0_BUFFEMPTY = 0x01,
+
+/* IH_MUTE field values */
+ HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT = 0x2,
+ HDMI_IH_MUTE_MUTE_ALL_INTERRUPT = 0x1,
+
+/* TX_INVID0 field values */
+ HDMI_TX_INVID0_INTERNAL_DE_GENERATOR_MASK = 0x80,
+ HDMI_TX_INVID0_INTERNAL_DE_GENERATOR_ENABLE = 0x80,
+ HDMI_TX_INVID0_INTERNAL_DE_GENERATOR_DISABLE = 0x00,
+ HDMI_TX_INVID0_VIDEO_MAPPING_MASK = 0x1F,
+ HDMI_TX_INVID0_VIDEO_MAPPING_OFFSET = 0,
+
+/* TX_INSTUFFING field values */
+ HDMI_TX_INSTUFFING_BDBDATA_STUFFING_MASK = 0x4,
+ HDMI_TX_INSTUFFING_BDBDATA_STUFFING_ENABLE = 0x4,
+ HDMI_TX_INSTUFFING_BDBDATA_STUFFING_DISABLE = 0x0,
+ HDMI_TX_INSTUFFING_RCRDATA_STUFFING_MASK = 0x2,
+ HDMI_TX_INSTUFFING_RCRDATA_STUFFING_ENABLE = 0x2,
+ HDMI_TX_INSTUFFING_RCRDATA_STUFFING_DISABLE = 0x0,
+ HDMI_TX_INSTUFFING_GYDATA_STUFFING_MASK = 0x1,
+ HDMI_TX_INSTUFFING_GYDATA_STUFFING_ENABLE = 0x1,
+ HDMI_TX_INSTUFFING_GYDATA_STUFFING_DISABLE = 0x0,
+
+/* VP_PR_CD field values */
+ HDMI_VP_PR_CD_COLOR_DEPTH_MASK = 0xF0,
+ HDMI_VP_PR_CD_COLOR_DEPTH_OFFSET = 4,
+ HDMI_VP_PR_CD_DESIRED_PR_FACTOR_MASK = 0x0F,
+ HDMI_VP_PR_CD_DESIRED_PR_FACTOR_OFFSET = 0,
+
+/* VP_STUFF field values */
+ HDMI_VP_STUFF_IDEFAULT_PHASE_MASK = 0x20,
+ HDMI_VP_STUFF_IDEFAULT_PHASE_OFFSET = 5,
+ HDMI_VP_STUFF_IFIX_PP_TO_LAST_MASK = 0x10,
+ HDMI_VP_STUFF_IFIX_PP_TO_LAST_OFFSET = 4,
+ HDMI_VP_STUFF_ICX_GOTO_P0_ST_MASK = 0x8,
+ HDMI_VP_STUFF_ICX_GOTO_P0_ST_OFFSET = 3,
+ HDMI_VP_STUFF_YCC422_STUFFING_MASK = 0x4,
+ HDMI_VP_STUFF_YCC422_STUFFING_STUFFING_MODE = 0x4,
+ HDMI_VP_STUFF_YCC422_STUFFING_DIRECT_MODE = 0x0,
+ HDMI_VP_STUFF_PP_STUFFING_MASK = 0x2,
+ HDMI_VP_STUFF_PP_STUFFING_STUFFING_MODE = 0x2,
+ HDMI_VP_STUFF_PP_STUFFING_DIRECT_MODE = 0x0,
+ HDMI_VP_STUFF_PR_STUFFING_MASK = 0x1,
+ HDMI_VP_STUFF_PR_STUFFING_STUFFING_MODE = 0x1,
+ HDMI_VP_STUFF_PR_STUFFING_DIRECT_MODE = 0x0,
+
+/* VP_CONF field values */
+ HDMI_VP_CONF_BYPASS_EN_MASK = 0x40,
+ HDMI_VP_CONF_BYPASS_EN_ENABLE = 0x40,
+ HDMI_VP_CONF_BYPASS_EN_DISABLE = 0x00,
+ HDMI_VP_CONF_PP_EN_ENMASK = 0x20,
+ HDMI_VP_CONF_PP_EN_ENABLE = 0x20,
+ HDMI_VP_CONF_PP_EN_DISABLE = 0x00,
+ HDMI_VP_CONF_PR_EN_MASK = 0x10,
+ HDMI_VP_CONF_PR_EN_ENABLE = 0x10,
+ HDMI_VP_CONF_PR_EN_DISABLE = 0x00,
+ HDMI_VP_CONF_YCC422_EN_MASK = 0x8,
+ HDMI_VP_CONF_YCC422_EN_ENABLE = 0x8,
+ HDMI_VP_CONF_YCC422_EN_DISABLE = 0x0,
+ HDMI_VP_CONF_BYPASS_SELECT_MASK = 0x4,
+ HDMI_VP_CONF_BYPASS_SELECT_VID_PACKETIZER = 0x4,
+ HDMI_VP_CONF_BYPASS_SELECT_PIX_REPEATER = 0x0,
+ HDMI_VP_CONF_OUTPUT_SELECTOR_MASK = 0x3,
+ HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS = 0x3,
+ HDMI_VP_CONF_OUTPUT_SELECTOR_YCC422 = 0x1,
+ HDMI_VP_CONF_OUTPUT_SELECTOR_PP = 0x0,
+
+/* VP_REMAP field values */
+ HDMI_VP_REMAP_MASK = 0x3,
+ HDMI_VP_REMAP_YCC422_24bit = 0x2,
+ HDMI_VP_REMAP_YCC422_20bit = 0x1,
+ HDMI_VP_REMAP_YCC422_16bit = 0x0,
+
+/* FC_INVIDCONF field values */
+ HDMI_FC_INVIDCONF_HDCP_KEEPOUT_MASK = 0x80,
+ HDMI_FC_INVIDCONF_HDCP_KEEPOUT_ACTIVE = 0x80,
+ HDMI_FC_INVIDCONF_HDCP_KEEPOUT_INACTIVE = 0x00,
+ HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_MASK = 0x40,
+ HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_HIGH = 0x40,
+ HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_LOW = 0x00,
+ HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_MASK = 0x20,
+ HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_HIGH = 0x20,
+ HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_LOW = 0x00,
+ HDMI_FC_INVIDCONF_DE_IN_POLARITY_MASK = 0x10,
+ HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_HIGH = 0x10,
+ HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_LOW = 0x00,
+ HDMI_FC_INVIDCONF_DVI_MODEZ_MASK = 0x8,
+ HDMI_FC_INVIDCONF_DVI_MODEZ_HDMI_MODE = 0x8,
+ HDMI_FC_INVIDCONF_DVI_MODEZ_DVI_MODE = 0x0,
+ HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_MASK = 0x2,
+ HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH = 0x2,
+ HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_LOW = 0x0,
+ HDMI_FC_INVIDCONF_IN_I_P_MASK = 0x1,
+ HDMI_FC_INVIDCONF_IN_I_P_INTERLACED = 0x1,
+ HDMI_FC_INVIDCONF_IN_I_P_PROGRESSIVE = 0x0,
+
+/* FC_AUDICONF0 field values */
+ HDMI_FC_AUDICONF0_CC_OFFSET = 4,
+ HDMI_FC_AUDICONF0_CC_MASK = 0x70,
+ HDMI_FC_AUDICONF0_CT_OFFSET = 0,
+ HDMI_FC_AUDICONF0_CT_MASK = 0xF,
+
+/* FC_AUDICONF1 field values */
+ HDMI_FC_AUDICONF1_SS_OFFSET = 3,
+ HDMI_FC_AUDICONF1_SS_MASK = 0x18,
+ HDMI_FC_AUDICONF1_SF_OFFSET = 0,
+ HDMI_FC_AUDICONF1_SF_MASK = 0x7,
+
+/* FC_AUDICONF3 field values */
+ HDMI_FC_AUDICONF3_LFEPBL_OFFSET = 5,
+ HDMI_FC_AUDICONF3_LFEPBL_MASK = 0x60,
+ HDMI_FC_AUDICONF3_DM_INH_OFFSET = 4,
+ HDMI_FC_AUDICONF3_DM_INH_MASK = 0x10,
+ HDMI_FC_AUDICONF3_LSV_OFFSET = 0,
+ HDMI_FC_AUDICONF3_LSV_MASK = 0xF,
+
+/* FC_AUDSCHNLS0 field values */
+ HDMI_FC_AUDSCHNLS0_CGMSA_OFFSET = 4,
+ HDMI_FC_AUDSCHNLS0_CGMSA_MASK = 0x30,
+ HDMI_FC_AUDSCHNLS0_COPYRIGHT_OFFSET = 0,
+ HDMI_FC_AUDSCHNLS0_COPYRIGHT_MASK = 0x01,
+
+/* FC_AUDSCHNLS3-6 field values */
+ HDMI_FC_AUDSCHNLS3_OIEC_CH0_OFFSET = 0,
+ HDMI_FC_AUDSCHNLS3_OIEC_CH0_MASK = 0x0f,
+ HDMI_FC_AUDSCHNLS3_OIEC_CH1_OFFSET = 4,
+ HDMI_FC_AUDSCHNLS3_OIEC_CH1_MASK = 0xf0,
+ HDMI_FC_AUDSCHNLS4_OIEC_CH2_OFFSET = 0,
+ HDMI_FC_AUDSCHNLS4_OIEC_CH2_MASK = 0x0f,
+ HDMI_FC_AUDSCHNLS4_OIEC_CH3_OFFSET = 4,
+ HDMI_FC_AUDSCHNLS4_OIEC_CH3_MASK = 0xf0,
+
+ HDMI_FC_AUDSCHNLS5_OIEC_CH0_OFFSET = 0,
+ HDMI_FC_AUDSCHNLS5_OIEC_CH0_MASK = 0x0f,
+ HDMI_FC_AUDSCHNLS5_OIEC_CH1_OFFSET = 4,
+ HDMI_FC_AUDSCHNLS5_OIEC_CH1_MASK = 0xf0,
+ HDMI_FC_AUDSCHNLS6_OIEC_CH2_OFFSET = 0,
+ HDMI_FC_AUDSCHNLS6_OIEC_CH2_MASK = 0x0f,
+ HDMI_FC_AUDSCHNLS6_OIEC_CH3_OFFSET = 4,
+ HDMI_FC_AUDSCHNLS6_OIEC_CH3_MASK = 0xf0,
+
+/* HDMI_FC_AUDSCHNLS7 field values */
+ HDMI_FC_AUDSCHNLS7_ACCURACY_OFFSET = 4,
+ HDMI_FC_AUDSCHNLS7_ACCURACY_MASK = 0x30,
+
+/* HDMI_FC_AUDSCHNLS8 field values */
+ HDMI_FC_AUDSCHNLS8_ORIGSAMPFREQ_MASK = 0xf0,
+ HDMI_FC_AUDSCHNLS8_ORIGSAMPFREQ_OFFSET = 4,
+ HDMI_FC_AUDSCHNLS8_WORDLEGNTH_MASK = 0x0f,
+ HDMI_FC_AUDSCHNLS8_WORDLEGNTH_OFFSET = 0,
+
+/* FC_AUDSCONF field values */
+ HDMI_FC_AUDSCONF_AUD_PACKET_SAMPFIT_MASK = 0xF0,
+ HDMI_FC_AUDSCONF_AUD_PACKET_SAMPFIT_OFFSET = 4,
+ HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_MASK = 0x1,
+ HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_OFFSET = 0,
+ HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_LAYOUT1 = 0x1,
+ HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_LAYOUT0 = 0x0,
+
+/* FC_STAT2 field values */
+ HDMI_FC_STAT2_OVERFLOW_MASK = 0x03,
+ HDMI_FC_STAT2_LOW_PRIORITY_OVERFLOW = 0x02,
+ HDMI_FC_STAT2_HIGH_PRIORITY_OVERFLOW = 0x01,
+
+/* FC_INT2 field values */
+ HDMI_FC_INT2_OVERFLOW_MASK = 0x03,
+ HDMI_FC_INT2_LOW_PRIORITY_OVERFLOW = 0x02,
+ HDMI_FC_INT2_HIGH_PRIORITY_OVERFLOW = 0x01,
+
+/* FC_MASK2 field values */
+ HDMI_FC_MASK2_OVERFLOW_MASK = 0x03,
+ HDMI_FC_MASK2_LOW_PRIORITY_OVERFLOW = 0x02,
+ HDMI_FC_MASK2_HIGH_PRIORITY_OVERFLOW = 0x01,
+
+/* FC_PRCONF field values */
+ HDMI_FC_PRCONF_INCOMING_PR_FACTOR_MASK = 0xF0,
+ HDMI_FC_PRCONF_INCOMING_PR_FACTOR_OFFSET = 4,
+ HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_MASK = 0x0F,
+ HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_OFFSET = 0,
+
+/* FC_PACKET_TX_EN field values */
+ HDMI_FC_PACKET_TX_EN_DRM_MASK = 0x80,
+ HDMI_FC_PACKET_TX_EN_DRM_ENABLE = 0x80,
+ HDMI_FC_PACKET_TX_EN_DRM_DISABLE = 0x00,
+
+/* FC_AVICONF0-FC_AVICONF3 field values */
+ HDMI_FC_AVICONF0_PIX_FMT_MASK = 0x03,
+ HDMI_FC_AVICONF0_PIX_FMT_RGB = 0x00,
+ HDMI_FC_AVICONF0_PIX_FMT_YCBCR422 = 0x01,
+ HDMI_FC_AVICONF0_PIX_FMT_YCBCR444 = 0x02,
+ HDMI_FC_AVICONF0_ACTIVE_FMT_MASK = 0x40,
+ HDMI_FC_AVICONF0_ACTIVE_FMT_INFO_PRESENT = 0x40,
+ HDMI_FC_AVICONF0_ACTIVE_FMT_NO_INFO = 0x00,
+ HDMI_FC_AVICONF0_BAR_DATA_MASK = 0x0C,
+ HDMI_FC_AVICONF0_BAR_DATA_NO_DATA = 0x00,
+ HDMI_FC_AVICONF0_BAR_DATA_VERT_BAR = 0x04,
+ HDMI_FC_AVICONF0_BAR_DATA_HORIZ_BAR = 0x08,
+ HDMI_FC_AVICONF0_BAR_DATA_VERT_HORIZ_BAR = 0x0C,
+ HDMI_FC_AVICONF0_SCAN_INFO_MASK = 0x30,
+ HDMI_FC_AVICONF0_SCAN_INFO_OVERSCAN = 0x10,
+ HDMI_FC_AVICONF0_SCAN_INFO_UNDERSCAN = 0x20,
+ HDMI_FC_AVICONF0_SCAN_INFO_NODATA = 0x00,
+
+ HDMI_FC_AVICONF1_ACTIVE_ASPECT_RATIO_MASK = 0x0F,
+ HDMI_FC_AVICONF1_ACTIVE_ASPECT_RATIO_USE_CODED = 0x08,
+ HDMI_FC_AVICONF1_ACTIVE_ASPECT_RATIO_4_3 = 0x09,
+ HDMI_FC_AVICONF1_ACTIVE_ASPECT_RATIO_16_9 = 0x0A,
+ HDMI_FC_AVICONF1_ACTIVE_ASPECT_RATIO_14_9 = 0x0B,
+ HDMI_FC_AVICONF1_CODED_ASPECT_RATIO_MASK = 0x30,
+ HDMI_FC_AVICONF1_CODED_ASPECT_RATIO_NO_DATA = 0x00,
+ HDMI_FC_AVICONF1_CODED_ASPECT_RATIO_4_3 = 0x10,
+ HDMI_FC_AVICONF1_CODED_ASPECT_RATIO_16_9 = 0x20,
+ HDMI_FC_AVICONF1_COLORIMETRY_MASK = 0xC0,
+ HDMI_FC_AVICONF1_COLORIMETRY_NO_DATA = 0x00,
+ HDMI_FC_AVICONF1_COLORIMETRY_SMPTE = 0x40,
+ HDMI_FC_AVICONF1_COLORIMETRY_ITUR = 0x80,
+ HDMI_FC_AVICONF1_COLORIMETRY_EXTENDED_INFO = 0xC0,
+
+ HDMI_FC_AVICONF2_SCALING_MASK = 0x03,
+ HDMI_FC_AVICONF2_SCALING_NONE = 0x00,
+ HDMI_FC_AVICONF2_SCALING_HORIZ = 0x01,
+ HDMI_FC_AVICONF2_SCALING_VERT = 0x02,
+ HDMI_FC_AVICONF2_SCALING_HORIZ_VERT = 0x03,
+ HDMI_FC_AVICONF2_RGB_QUANT_MASK = 0x0C,
+ HDMI_FC_AVICONF2_RGB_QUANT_DEFAULT = 0x00,
+ HDMI_FC_AVICONF2_RGB_QUANT_LIMITED_RANGE = 0x04,
+ HDMI_FC_AVICONF2_RGB_QUANT_FULL_RANGE = 0x08,
+ HDMI_FC_AVICONF2_EXT_COLORIMETRY_MASK = 0x70,
+ HDMI_FC_AVICONF2_EXT_COLORIMETRY_XVYCC601 = 0x00,
+ HDMI_FC_AVICONF2_EXT_COLORIMETRY_XVYCC709 = 0x10,
+ HDMI_FC_AVICONF2_EXT_COLORIMETRY_SYCC601 = 0x20,
+ HDMI_FC_AVICONF2_EXT_COLORIMETRY_ADOBE_YCC601 = 0x30,
+ HDMI_FC_AVICONF2_EXT_COLORIMETRY_ADOBE_RGB = 0x40,
+ HDMI_FC_AVICONF2_IT_CONTENT_MASK = 0x80,
+ HDMI_FC_AVICONF2_IT_CONTENT_NO_DATA = 0x00,
+ HDMI_FC_AVICONF2_IT_CONTENT_VALID = 0x80,
+
+ HDMI_FC_AVICONF3_IT_CONTENT_TYPE_MASK = 0x03,
+ HDMI_FC_AVICONF3_IT_CONTENT_TYPE_GRAPHICS = 0x00,
+ HDMI_FC_AVICONF3_IT_CONTENT_TYPE_PHOTO = 0x01,
+ HDMI_FC_AVICONF3_IT_CONTENT_TYPE_CINEMA = 0x02,
+ HDMI_FC_AVICONF3_IT_CONTENT_TYPE_GAME = 0x03,
+ HDMI_FC_AVICONF3_QUANT_RANGE_MASK = 0x0C,
+ HDMI_FC_AVICONF3_QUANT_RANGE_LIMITED = 0x00,
+ HDMI_FC_AVICONF3_QUANT_RANGE_FULL = 0x04,
+
+/* FC_DBGFORCE field values */
+ HDMI_FC_DBGFORCE_FORCEAUDIO = 0x10,
+ HDMI_FC_DBGFORCE_FORCEVIDEO = 0x1,
+
+/* FC_DATAUTO0 field values */
+ HDMI_FC_DATAUTO0_VSD_MASK = 0x08,
+ HDMI_FC_DATAUTO0_VSD_OFFSET = 3,
+
+/* FC_DATAUTO3 field values */
+ HDMI_FC_DATAUTO3_GCP_AUTO = 0x04,
+
+/* PHY_CONF0 field values */
+ HDMI_PHY_CONF0_PDZ_MASK = 0x80,
+ HDMI_PHY_CONF0_PDZ_OFFSET = 7,
+ HDMI_PHY_CONF0_ENTMDS_MASK = 0x40,
+ HDMI_PHY_CONF0_ENTMDS_OFFSET = 6,
+ HDMI_PHY_CONF0_SVSRET_MASK = 0x20,
+ HDMI_PHY_CONF0_SVSRET_OFFSET = 5,
+ HDMI_PHY_CONF0_GEN2_PDDQ_MASK = 0x10,
+ HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET = 4,
+ HDMI_PHY_CONF0_GEN2_TXPWRON_MASK = 0x8,
+ HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET = 3,
+ HDMI_PHY_CONF0_GEN2_ENHPDRXSENSE_MASK = 0x4,
+ HDMI_PHY_CONF0_GEN2_ENHPDRXSENSE_OFFSET = 2,
+ HDMI_PHY_CONF0_SELDATAENPOL_MASK = 0x2,
+ HDMI_PHY_CONF0_SELDATAENPOL_OFFSET = 1,
+ HDMI_PHY_CONF0_SELDIPIF_MASK = 0x1,
+ HDMI_PHY_CONF0_SELDIPIF_OFFSET = 0,
+
+/* PHY_TST0 field values */
+ HDMI_PHY_TST0_TSTCLR_MASK = 0x20,
+ HDMI_PHY_TST0_TSTCLR_OFFSET = 5,
+ HDMI_PHY_TST0_TSTEN_MASK = 0x10,
+ HDMI_PHY_TST0_TSTEN_OFFSET = 4,
+ HDMI_PHY_TST0_TSTCLK_MASK = 0x1,
+ HDMI_PHY_TST0_TSTCLK_OFFSET = 0,
+
+/* PHY_STAT0 field values */
+ HDMI_PHY_RX_SENSE3 = 0x80,
+ HDMI_PHY_RX_SENSE2 = 0x40,
+ HDMI_PHY_RX_SENSE1 = 0x20,
+ HDMI_PHY_RX_SENSE0 = 0x10,
+ HDMI_PHY_HPD = 0x02,
+ HDMI_PHY_TX_PHY_LOCK = 0x01,
+
+/* PHY_I2CM_SLAVE_ADDR field values */
+ HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2 = 0x69,
+ HDMI_PHY_I2CM_SLAVE_ADDR_HEAC_PHY = 0x49,
+
+/* PHY_I2CM_OPERATION_ADDR field values */
+ HDMI_PHY_I2CM_OPERATION_ADDR_WRITE = 0x10,
+ HDMI_PHY_I2CM_OPERATION_ADDR_READ = 0x1,
+
+/* HDMI_PHY_I2CM_INT_ADDR */
+ HDMI_PHY_I2CM_INT_ADDR_DONE_POL = 0x08,
+ HDMI_PHY_I2CM_INT_ADDR_DONE_MASK = 0x04,
+
+/* HDMI_PHY_I2CM_CTLINT_ADDR */
+ HDMI_PHY_I2CM_CTLINT_ADDR_NAC_POL = 0x80,
+ HDMI_PHY_I2CM_CTLINT_ADDR_NAC_MASK = 0x40,
+ HDMI_PHY_I2CM_CTLINT_ADDR_ARBITRATION_POL = 0x08,
+ HDMI_PHY_I2CM_CTLINT_ADDR_ARBITRATION_MASK = 0x04,
+
+/* AUD_CONF0 field values */
+ HDMI_AUD_CONF0_SW_RESET = 0x80,
+ HDMI_AUD_CONF0_I2S_SELECT = 0x20,
+ HDMI_AUD_CONF0_I2S_EN3 = 0x08,
+ HDMI_AUD_CONF0_I2S_EN2 = 0x04,
+ HDMI_AUD_CONF0_I2S_EN1 = 0x02,
+ HDMI_AUD_CONF0_I2S_EN0 = 0x01,
+
+/* AUD_CONF1 field values */
+ HDMI_AUD_CONF1_MODE_I2S = 0x00,
+ HDMI_AUD_CONF1_MODE_RIGHT_J = 0x20,
+ HDMI_AUD_CONF1_MODE_LEFT_J = 0x40,
+ HDMI_AUD_CONF1_MODE_BURST_1 = 0x60,
+ HDMI_AUD_CONF1_MODE_BURST_2 = 0x80,
+ HDMI_AUD_CONF1_WIDTH_16 = 0x10,
+ HDMI_AUD_CONF1_WIDTH_24 = 0x18,
+
+/* AUD_CTS3 field values */
+ HDMI_AUD_CTS3_N_SHIFT_OFFSET = 5,
+ HDMI_AUD_CTS3_N_SHIFT_MASK = 0xe0,
+ HDMI_AUD_CTS3_N_SHIFT_1 = 0,
+ HDMI_AUD_CTS3_N_SHIFT_16 = 0x20,
+ HDMI_AUD_CTS3_N_SHIFT_32 = 0x40,
+ HDMI_AUD_CTS3_N_SHIFT_64 = 0x60,
+ HDMI_AUD_CTS3_N_SHIFT_128 = 0x80,
+ HDMI_AUD_CTS3_N_SHIFT_256 = 0xa0,
+ /* note that the CTS3 MANUAL bit has been removed
+ from our part. Can't set it, will read as 0. */
+ HDMI_AUD_CTS3_CTS_MANUAL = 0x10,
+ HDMI_AUD_CTS3_AUDCTS19_16_MASK = 0x0f,
+
+/* HDMI_AUD_INPUTCLKFS field values */
+ HDMI_AUD_INPUTCLKFS_128FS = 0,
+ HDMI_AUD_INPUTCLKFS_256FS = 1,
+ HDMI_AUD_INPUTCLKFS_512FS = 2,
+ HDMI_AUD_INPUTCLKFS_64FS = 4,
+
+/* AHB_DMA_CONF0 field values */
+ HDMI_AHB_DMA_CONF0_SW_FIFO_RST_OFFSET = 7,
+ HDMI_AHB_DMA_CONF0_SW_FIFO_RST_MASK = 0x80,
+ HDMI_AHB_DMA_CONF0_HBR = 0x10,
+ HDMI_AHB_DMA_CONF0_EN_HLOCK_OFFSET = 3,
+ HDMI_AHB_DMA_CONF0_EN_HLOCK_MASK = 0x08,
+ HDMI_AHB_DMA_CONF0_INCR_TYPE_OFFSET = 1,
+ HDMI_AHB_DMA_CONF0_INCR_TYPE_MASK = 0x06,
+ HDMI_AHB_DMA_CONF0_INCR4 = 0x0,
+ HDMI_AHB_DMA_CONF0_INCR8 = 0x2,
+ HDMI_AHB_DMA_CONF0_INCR16 = 0x4,
+ HDMI_AHB_DMA_CONF0_BURST_MODE = 0x1,
+
+/* HDMI_AHB_DMA_START field values */
+ HDMI_AHB_DMA_START_START_OFFSET = 0,
+ HDMI_AHB_DMA_START_START_MASK = 0x01,
+
+/* HDMI_AHB_DMA_STOP field values */
+ HDMI_AHB_DMA_STOP_STOP_OFFSET = 0,
+ HDMI_AHB_DMA_STOP_STOP_MASK = 0x01,
+
+/* AHB_DMA_STAT, AHB_DMA_INT, AHB_DMA_MASK, AHB_DMA_POL field values */
+ HDMI_AHB_DMA_DONE = 0x80,
+ HDMI_AHB_DMA_RETRY_SPLIT = 0x40,
+ HDMI_AHB_DMA_LOSTOWNERSHIP = 0x20,
+ HDMI_AHB_DMA_ERROR = 0x10,
+ HDMI_AHB_DMA_FIFO_THREMPTY = 0x04,
+ HDMI_AHB_DMA_FIFO_FULL = 0x02,
+ HDMI_AHB_DMA_FIFO_EMPTY = 0x01,
+
+/* AHB_DMA_BUFFSTAT, AHB_DMA_BUFFINT,AHB_DMA_BUFFMASK,AHB_DMA_BUFFPOL values */
+ HDMI_AHB_DMA_BUFFSTAT_FULL = 0x02,
+ HDMI_AHB_DMA_BUFFSTAT_EMPTY = 0x01,
+
+/* MC_CLKDIS field values */
+ HDMI_MC_CLKDIS_HDCPCLK_DISABLE = 0x40,
+ HDMI_MC_CLKDIS_CECCLK_DISABLE = 0x20,
+ HDMI_MC_CLKDIS_CSCCLK_DISABLE = 0x10,
+ HDMI_MC_CLKDIS_AUDCLK_DISABLE = 0x8,
+ HDMI_MC_CLKDIS_PREPCLK_DISABLE = 0x4,
+ HDMI_MC_CLKDIS_TMDSCLK_DISABLE = 0x2,
+ HDMI_MC_CLKDIS_PIXELCLK_DISABLE = 0x1,
+
+/* MC_SWRSTZ field values */
+ HDMI_MC_SWRSTZ_I2SSWRST_REQ = 0x08,
+ HDMI_MC_SWRSTZ_TMDSSWRST_REQ = 0x02,
+
+/* MC_FLOWCTRL field values */
+ HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_MASK = 0x1,
+ HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_IN_PATH = 0x1,
+ HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_BYPASS = 0x0,
+
+/* MC_PHYRSTZ field values */
+ HDMI_MC_PHYRSTZ_PHYRSTZ = 0x01,
+
+/* MC_HEACPHY_RST field values */
+ HDMI_MC_HEACPHY_RST_ASSERT = 0x1,
+ HDMI_MC_HEACPHY_RST_DEASSERT = 0x0,
+
+/* CSC_CFG field values */
+ HDMI_CSC_CFG_INTMODE_MASK = 0x30,
+ HDMI_CSC_CFG_INTMODE_OFFSET = 4,
+ HDMI_CSC_CFG_INTMODE_DISABLE = 0x00,
+ HDMI_CSC_CFG_INTMODE_CHROMA_INT_FORMULA1 = 0x10,
+ HDMI_CSC_CFG_INTMODE_CHROMA_INT_FORMULA2 = 0x20,
+ HDMI_CSC_CFG_DECMODE_MASK = 0x3,
+ HDMI_CSC_CFG_DECMODE_OFFSET = 0,
+ HDMI_CSC_CFG_DECMODE_DISABLE = 0x0,
+ HDMI_CSC_CFG_DECMODE_CHROMA_INT_FORMULA1 = 0x1,
+ HDMI_CSC_CFG_DECMODE_CHROMA_INT_FORMULA2 = 0x2,
+ HDMI_CSC_CFG_DECMODE_CHROMA_INT_FORMULA3 = 0x3,
+
+/* CSC_SCALE field values */
+ HDMI_CSC_SCALE_CSC_COLORDE_PTH_MASK = 0xF0,
+ HDMI_CSC_SCALE_CSC_COLORDE_PTH_24BPP = 0x00,
+ HDMI_CSC_SCALE_CSC_COLORDE_PTH_30BPP = 0x50,
+ HDMI_CSC_SCALE_CSC_COLORDE_PTH_36BPP = 0x60,
+ HDMI_CSC_SCALE_CSC_COLORDE_PTH_48BPP = 0x70,
+ HDMI_CSC_SCALE_CSCSCALE_MASK = 0x03,
+
+/* A_HDCPCFG0 field values */
+ HDMI_A_HDCPCFG0_ELVENA_MASK = 0x80,
+ HDMI_A_HDCPCFG0_ELVENA_ENABLE = 0x80,
+ HDMI_A_HDCPCFG0_ELVENA_DISABLE = 0x00,
+ HDMI_A_HDCPCFG0_I2CFASTMODE_MASK = 0x40,
+ HDMI_A_HDCPCFG0_I2CFASTMODE_ENABLE = 0x40,
+ HDMI_A_HDCPCFG0_I2CFASTMODE_DISABLE = 0x00,
+ HDMI_A_HDCPCFG0_BYPENCRYPTION_MASK = 0x20,
+ HDMI_A_HDCPCFG0_BYPENCRYPTION_ENABLE = 0x20,
+ HDMI_A_HDCPCFG0_BYPENCRYPTION_DISABLE = 0x00,
+ HDMI_A_HDCPCFG0_SYNCRICHECK_MASK = 0x10,
+ HDMI_A_HDCPCFG0_SYNCRICHECK_ENABLE = 0x10,
+ HDMI_A_HDCPCFG0_SYNCRICHECK_DISABLE = 0x00,
+ HDMI_A_HDCPCFG0_AVMUTE_MASK = 0x8,
+ HDMI_A_HDCPCFG0_AVMUTE_ENABLE = 0x8,
+ HDMI_A_HDCPCFG0_AVMUTE_DISABLE = 0x0,
+ HDMI_A_HDCPCFG0_RXDETECT_MASK = 0x4,
+ HDMI_A_HDCPCFG0_RXDETECT_ENABLE = 0x4,
+ HDMI_A_HDCPCFG0_RXDETECT_DISABLE = 0x0,
+ HDMI_A_HDCPCFG0_EN11FEATURE_MASK = 0x2,
+ HDMI_A_HDCPCFG0_EN11FEATURE_ENABLE = 0x2,
+ HDMI_A_HDCPCFG0_EN11FEATURE_DISABLE = 0x0,
+ HDMI_A_HDCPCFG0_HDMIDVI_MASK = 0x1,
+ HDMI_A_HDCPCFG0_HDMIDVI_HDMI = 0x1,
+ HDMI_A_HDCPCFG0_HDMIDVI_DVI = 0x0,
+
+/* A_HDCPCFG1 field values */
+ HDMI_A_HDCPCFG1_DISSHA1CHECK_MASK = 0x8,
+ HDMI_A_HDCPCFG1_DISSHA1CHECK_DISABLE = 0x8,
+ HDMI_A_HDCPCFG1_DISSHA1CHECK_ENABLE = 0x0,
+ HDMI_A_HDCPCFG1_PH2UPSHFTENC_MASK = 0x4,
+ HDMI_A_HDCPCFG1_PH2UPSHFTENC_ENABLE = 0x4,
+ HDMI_A_HDCPCFG1_PH2UPSHFTENC_DISABLE = 0x0,
+ HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_MASK = 0x2,
+ HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_DISABLE = 0x2,
+ HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_ENABLE = 0x0,
+ HDMI_A_HDCPCFG1_SWRESET_MASK = 0x1,
+ HDMI_A_HDCPCFG1_SWRESET_ASSERT = 0x0,
+
+/* A_VIDPOLCFG field values */
+ HDMI_A_VIDPOLCFG_UNENCRYPTCONF_MASK = 0x60,
+ HDMI_A_VIDPOLCFG_UNENCRYPTCONF_OFFSET = 5,
+ HDMI_A_VIDPOLCFG_DATAENPOL_MASK = 0x10,
+ HDMI_A_VIDPOLCFG_DATAENPOL_ACTIVE_HIGH = 0x10,
+ HDMI_A_VIDPOLCFG_DATAENPOL_ACTIVE_LOW = 0x0,
+ HDMI_A_VIDPOLCFG_VSYNCPOL_MASK = 0x8,
+ HDMI_A_VIDPOLCFG_VSYNCPOL_ACTIVE_HIGH = 0x8,
+ HDMI_A_VIDPOLCFG_VSYNCPOL_ACTIVE_LOW = 0x0,
+ HDMI_A_VIDPOLCFG_HSYNCPOL_MASK = 0x2,
+ HDMI_A_VIDPOLCFG_HSYNCPOL_ACTIVE_HIGH = 0x2,
+ HDMI_A_VIDPOLCFG_HSYNCPOL_ACTIVE_LOW = 0x0,
+
+/* I2CM_OPERATION field values */
+ HDMI_I2CM_OPERATION_WRITE = 0x10,
+ HDMI_I2CM_OPERATION_READ_EXT = 0x2,
+ HDMI_I2CM_OPERATION_READ = 0x1,
+
+/* I2CM_INT field values */
+ HDMI_I2CM_INT_DONE_POL = 0x8,
+ HDMI_I2CM_INT_DONE_MASK = 0x4,
+
+/* I2CM_CTLINT field values */
+ HDMI_I2CM_CTLINT_NAC_POL = 0x80,
+ HDMI_I2CM_CTLINT_NAC_MASK = 0x40,
+ HDMI_I2CM_CTLINT_ARB_POL = 0x8,
+ HDMI_I2CM_CTLINT_ARB_MASK = 0x4,
+};
+
+/*
+ * HDMI 3D TX PHY registers
+ */
+#define HDMI_3D_TX_PHY_PWRCTRL 0x00
+#define HDMI_3D_TX_PHY_SERDIVCTRL 0x01
+#define HDMI_3D_TX_PHY_SERCKCTRL 0x02
+#define HDMI_3D_TX_PHY_SERCKKILLCTRL 0x03
+#define HDMI_3D_TX_PHY_TXRESCTRL 0x04
+#define HDMI_3D_TX_PHY_CKCALCTRL 0x05
+#define HDMI_3D_TX_PHY_CPCE_CTRL 0x06
+#define HDMI_3D_TX_PHY_TXCLKMEASCTRL 0x07
+#define HDMI_3D_TX_PHY_TXMEASCTRL 0x08
+#define HDMI_3D_TX_PHY_CKSYMTXCTRL 0x09
+#define HDMI_3D_TX_PHY_CMPSEQCTRL 0x0a
+#define HDMI_3D_TX_PHY_CMPPWRCTRL 0x0b
+#define HDMI_3D_TX_PHY_CMPMODECTRL 0x0c
+#define HDMI_3D_TX_PHY_MEASCTRL 0x0d
+#define HDMI_3D_TX_PHY_VLEVCTRL 0x0e
+#define HDMI_3D_TX_PHY_D2ACTRL 0x0f
+#define HDMI_3D_TX_PHY_CURRCTRL 0x10
+#define HDMI_3D_TX_PHY_DRVANACTRL 0x11
+#define HDMI_3D_TX_PHY_PLLMEASCTRL 0x12
+#define HDMI_3D_TX_PHY_PLLPHBYCTRL 0x13
+#define HDMI_3D_TX_PHY_GRP_CTRL 0x14
+#define HDMI_3D_TX_PHY_GMPCTRL 0x15
+#define HDMI_3D_TX_PHY_MPLLMEASCTRL 0x16
+#define HDMI_3D_TX_PHY_MSM_CTRL 0x17
+#define HDMI_3D_TX_PHY_SCRPB_STATUS 0x18
+#define HDMI_3D_TX_PHY_TXTERM 0x19
+#define HDMI_3D_TX_PHY_PTRPT_ENBL 0x1a
+#define HDMI_3D_TX_PHY_PATTERNGEN 0x1b
+#define HDMI_3D_TX_PHY_SDCAP_MODE 0x1c
+#define HDMI_3D_TX_PHY_SCOPEMODE 0x1d
+#define HDMI_3D_TX_PHY_DIGTXMODE 0x1e
+#define HDMI_3D_TX_PHY_STR_STATUS 0x1f
+#define HDMI_3D_TX_PHY_SCOPECNT0 0x20
+#define HDMI_3D_TX_PHY_SCOPECNT1 0x21
+#define HDMI_3D_TX_PHY_SCOPECNT2 0x22
+#define HDMI_3D_TX_PHY_SCOPECNTCLK 0x23
+#define HDMI_3D_TX_PHY_SCOPESAMPLE 0x24
+#define HDMI_3D_TX_PHY_SCOPECNTMSB01 0x25
+#define HDMI_3D_TX_PHY_SCOPECNTMSB2CK 0x26
+
+/* HDMI_3D_TX_PHY_CKCALCTRL values */
+#define HDMI_3D_TX_PHY_CKCALCTRL_OVERRIDE BIT(15)
+
+/* HDMI_3D_TX_PHY_MSM_CTRL values */
+#define HDMI_3D_TX_PHY_MSM_CTRL_MPLL_PH_SEL_CK BIT(13)
+#define HDMI_3D_TX_PHY_MSM_CTRL_CKO_SEL_CLK_REF_MPLL (0 << 1)
+#define HDMI_3D_TX_PHY_MSM_CTRL_CKO_SEL_OFF (1 << 1)
+#define HDMI_3D_TX_PHY_MSM_CTRL_CKO_SEL_PCLK (2 << 1)
+#define HDMI_3D_TX_PHY_MSM_CTRL_CKO_SEL_FB_CLK (3 << 1)
+#define HDMI_3D_TX_PHY_MSM_CTRL_SCOPE_CK_SEL BIT(0)
+
+/* HDMI_3D_TX_PHY_PTRPT_ENBL values */
+#define HDMI_3D_TX_PHY_PTRPT_ENBL_OVERRIDE BIT(15)
+#define HDMI_3D_TX_PHY_PTRPT_ENBL_PG_SKIP_BIT2 BIT(8)
+#define HDMI_3D_TX_PHY_PTRPT_ENBL_PG_SKIP_BIT1 BIT(7)
+#define HDMI_3D_TX_PHY_PTRPT_ENBL_PG_SKIP_BIT0 BIT(6)
+#define HDMI_3D_TX_PHY_PTRPT_ENBL_CK_REF_ENB BIT(5)
+#define HDMI_3D_TX_PHY_PTRPT_ENBL_RCAL_ENB BIT(4)
+#define HDMI_3D_TX_PHY_PTRPT_ENBL_TX_CLK_ALIGN_ENB BIT(3)
+#define HDMI_3D_TX_PHY_PTRPT_ENBL_TX_READY BIT(2)
+#define HDMI_3D_TX_PHY_PTRPT_ENBL_CKO_WORD_ENB BIT(1)
+#define HDMI_3D_TX_PHY_PTRPT_ENBL_REFCLK_ENB BIT(0)
+
+#endif /* __DW_HDMI_H__ */
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
new file mode 100644
index 000000000..b2efecf7d
--- /dev/null
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -0,0 +1,1245 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd
+ * Copyright (C) STMicroelectronics SA 2017
+ *
+ * Modified by Philippe Cornu <philippe.cornu@st.com>
+ * This generic Synopsys DesignWare MIPI DSI host driver is based on the
+ * Rockchip version from rockchip/dw-mipi-dsi.c with phy & bridge APIs.
+ */
+
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/debugfs.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/bridge/dw_mipi_dsi.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_of.h>
+#include <drm/drm_print.h>
+
+#define HWVER_131 0x31333100 /* IP version 1.31 */
+
+#define DSI_VERSION 0x00
+#define VERSION GENMASK(31, 8)
+
+#define DSI_PWR_UP 0x04
+#define RESET 0
+#define POWERUP BIT(0)
+
+#define DSI_CLKMGR_CFG 0x08
+#define TO_CLK_DIVISION(div) (((div) & 0xff) << 8)
+#define TX_ESC_CLK_DIVISION(div) ((div) & 0xff)
+
+#define DSI_DPI_VCID 0x0c
+#define DPI_VCID(vcid) ((vcid) & 0x3)
+
+#define DSI_DPI_COLOR_CODING 0x10
+#define LOOSELY18_EN BIT(8)
+#define DPI_COLOR_CODING_16BIT_1 0x0
+#define DPI_COLOR_CODING_16BIT_2 0x1
+#define DPI_COLOR_CODING_16BIT_3 0x2
+#define DPI_COLOR_CODING_18BIT_1 0x3
+#define DPI_COLOR_CODING_18BIT_2 0x4
+#define DPI_COLOR_CODING_24BIT 0x5
+
+#define DSI_DPI_CFG_POL 0x14
+#define COLORM_ACTIVE_LOW BIT(4)
+#define SHUTD_ACTIVE_LOW BIT(3)
+#define HSYNC_ACTIVE_LOW BIT(2)
+#define VSYNC_ACTIVE_LOW BIT(1)
+#define DATAEN_ACTIVE_LOW BIT(0)
+
+#define DSI_DPI_LP_CMD_TIM 0x18
+#define OUTVACT_LPCMD_TIME(p) (((p) & 0xff) << 16)
+#define INVACT_LPCMD_TIME(p) ((p) & 0xff)
+
+#define DSI_DBI_VCID 0x1c
+#define DSI_DBI_CFG 0x20
+#define DSI_DBI_PARTITIONING_EN 0x24
+#define DSI_DBI_CMDSIZE 0x28
+
+#define DSI_PCKHDL_CFG 0x2c
+#define CRC_RX_EN BIT(4)
+#define ECC_RX_EN BIT(3)
+#define BTA_EN BIT(2)
+#define EOTP_RX_EN BIT(1)
+#define EOTP_TX_EN BIT(0)
+
+#define DSI_GEN_VCID 0x30
+
+#define DSI_MODE_CFG 0x34
+#define ENABLE_VIDEO_MODE 0
+#define ENABLE_CMD_MODE BIT(0)
+
+#define DSI_VID_MODE_CFG 0x38
+#define ENABLE_LOW_POWER (0x3f << 8)
+#define ENABLE_LOW_POWER_MASK (0x3f << 8)
+#define VID_MODE_TYPE_NON_BURST_SYNC_PULSES 0x0
+#define VID_MODE_TYPE_NON_BURST_SYNC_EVENTS 0x1
+#define VID_MODE_TYPE_BURST 0x2
+#define VID_MODE_TYPE_MASK 0x3
+#define ENABLE_LOW_POWER_CMD BIT(15)
+#define VID_MODE_VPG_ENABLE BIT(16)
+#define VID_MODE_VPG_MODE BIT(20)
+#define VID_MODE_VPG_HORIZONTAL BIT(24)
+
+#define DSI_VID_PKT_SIZE 0x3c
+#define VID_PKT_SIZE(p) ((p) & 0x3fff)
+
+#define DSI_VID_NUM_CHUNKS 0x40
+#define VID_NUM_CHUNKS(c) ((c) & 0x1fff)
+
+#define DSI_VID_NULL_SIZE 0x44
+#define VID_NULL_SIZE(b) ((b) & 0x1fff)
+
+#define DSI_VID_HSA_TIME 0x48
+#define DSI_VID_HBP_TIME 0x4c
+#define DSI_VID_HLINE_TIME 0x50
+#define DSI_VID_VSA_LINES 0x54
+#define DSI_VID_VBP_LINES 0x58
+#define DSI_VID_VFP_LINES 0x5c
+#define DSI_VID_VACTIVE_LINES 0x60
+#define DSI_EDPI_CMD_SIZE 0x64
+
+#define DSI_CMD_MODE_CFG 0x68
+#define MAX_RD_PKT_SIZE_LP BIT(24)
+#define DCS_LW_TX_LP BIT(19)
+#define DCS_SR_0P_TX_LP BIT(18)
+#define DCS_SW_1P_TX_LP BIT(17)
+#define DCS_SW_0P_TX_LP BIT(16)
+#define GEN_LW_TX_LP BIT(14)
+#define GEN_SR_2P_TX_LP BIT(13)
+#define GEN_SR_1P_TX_LP BIT(12)
+#define GEN_SR_0P_TX_LP BIT(11)
+#define GEN_SW_2P_TX_LP BIT(10)
+#define GEN_SW_1P_TX_LP BIT(9)
+#define GEN_SW_0P_TX_LP BIT(8)
+#define ACK_RQST_EN BIT(1)
+#define TEAR_FX_EN BIT(0)
+
+#define CMD_MODE_ALL_LP (MAX_RD_PKT_SIZE_LP | \
+ DCS_LW_TX_LP | \
+ DCS_SR_0P_TX_LP | \
+ DCS_SW_1P_TX_LP | \
+ DCS_SW_0P_TX_LP | \
+ GEN_LW_TX_LP | \
+ GEN_SR_2P_TX_LP | \
+ GEN_SR_1P_TX_LP | \
+ GEN_SR_0P_TX_LP | \
+ GEN_SW_2P_TX_LP | \
+ GEN_SW_1P_TX_LP | \
+ GEN_SW_0P_TX_LP)
+
+#define DSI_GEN_HDR 0x6c
+#define DSI_GEN_PLD_DATA 0x70
+
+#define DSI_CMD_PKT_STATUS 0x74
+#define GEN_RD_CMD_BUSY BIT(6)
+#define GEN_PLD_R_FULL BIT(5)
+#define GEN_PLD_R_EMPTY BIT(4)
+#define GEN_PLD_W_FULL BIT(3)
+#define GEN_PLD_W_EMPTY BIT(2)
+#define GEN_CMD_FULL BIT(1)
+#define GEN_CMD_EMPTY BIT(0)
+
+#define DSI_TO_CNT_CFG 0x78
+#define HSTX_TO_CNT(p) (((p) & 0xffff) << 16)
+#define LPRX_TO_CNT(p) ((p) & 0xffff)
+
+#define DSI_HS_RD_TO_CNT 0x7c
+#define DSI_LP_RD_TO_CNT 0x80
+#define DSI_HS_WR_TO_CNT 0x84
+#define DSI_LP_WR_TO_CNT 0x88
+#define DSI_BTA_TO_CNT 0x8c
+
+#define DSI_LPCLK_CTRL 0x94
+#define AUTO_CLKLANE_CTRL BIT(1)
+#define PHY_TXREQUESTCLKHS BIT(0)
+
+#define DSI_PHY_TMR_LPCLK_CFG 0x98
+#define PHY_CLKHS2LP_TIME(lbcc) (((lbcc) & 0x3ff) << 16)
+#define PHY_CLKLP2HS_TIME(lbcc) ((lbcc) & 0x3ff)
+
+#define DSI_PHY_TMR_CFG 0x9c
+#define PHY_HS2LP_TIME(lbcc) (((lbcc) & 0xff) << 24)
+#define PHY_LP2HS_TIME(lbcc) (((lbcc) & 0xff) << 16)
+#define MAX_RD_TIME(lbcc) ((lbcc) & 0x7fff)
+#define PHY_HS2LP_TIME_V131(lbcc) (((lbcc) & 0x3ff) << 16)
+#define PHY_LP2HS_TIME_V131(lbcc) ((lbcc) & 0x3ff)
+
+#define DSI_PHY_RSTZ 0xa0
+#define PHY_DISFORCEPLL 0
+#define PHY_ENFORCEPLL BIT(3)
+#define PHY_DISABLECLK 0
+#define PHY_ENABLECLK BIT(2)
+#define PHY_RSTZ 0
+#define PHY_UNRSTZ BIT(1)
+#define PHY_SHUTDOWNZ 0
+#define PHY_UNSHUTDOWNZ BIT(0)
+
+#define DSI_PHY_IF_CFG 0xa4
+#define PHY_STOP_WAIT_TIME(cycle) (((cycle) & 0xff) << 8)
+#define N_LANES(n) (((n) - 1) & 0x3)
+
+#define DSI_PHY_ULPS_CTRL 0xa8
+#define DSI_PHY_TX_TRIGGERS 0xac
+
+#define DSI_PHY_STATUS 0xb0
+#define PHY_STOP_STATE_CLK_LANE BIT(2)
+#define PHY_LOCK BIT(0)
+
+#define DSI_PHY_TST_CTRL0 0xb4
+#define PHY_TESTCLK BIT(1)
+#define PHY_UNTESTCLK 0
+#define PHY_TESTCLR BIT(0)
+#define PHY_UNTESTCLR 0
+
+#define DSI_PHY_TST_CTRL1 0xb8
+#define PHY_TESTEN BIT(16)
+#define PHY_UNTESTEN 0
+#define PHY_TESTDOUT(n) (((n) & 0xff) << 8)
+#define PHY_TESTDIN(n) ((n) & 0xff)
+
+#define DSI_INT_ST0 0xbc
+#define DSI_INT_ST1 0xc0
+#define DSI_INT_MSK0 0xc4
+#define DSI_INT_MSK1 0xc8
+
+#define DSI_PHY_TMR_RD_CFG 0xf4
+#define MAX_RD_TIME_V131(lbcc) ((lbcc) & 0x7fff)
+
+#define PHY_STATUS_TIMEOUT_US 10000
+#define CMD_PKT_STATUS_TIMEOUT_US 20000
+
+#ifdef CONFIG_DEBUG_FS
+#define VPG_DEFS(name, dsi) \
+ ((void __force *)&((*dsi).vpg_defs.name))
+
+#define REGISTER(name, mask, dsi) \
+ { #name, VPG_DEFS(name, dsi), mask, dsi }
+
+struct debugfs_entries {
+ const char *name;
+ bool *reg;
+ u32 mask;
+ struct dw_mipi_dsi *dsi;
+};
+#endif /* CONFIG_DEBUG_FS */
+
+struct dw_mipi_dsi {
+ struct drm_bridge bridge;
+ struct mipi_dsi_host dsi_host;
+ struct drm_bridge *panel_bridge;
+ struct device *dev;
+ void __iomem *base;
+
+ struct clk *pclk;
+
+ unsigned int lane_mbps; /* per lane */
+ u32 channel;
+ u32 lanes;
+ u32 format;
+ unsigned long mode_flags;
+
+#ifdef CONFIG_DEBUG_FS
+ struct dentry *debugfs;
+ struct debugfs_entries *debugfs_vpg;
+ struct {
+ bool vpg;
+ bool vpg_horizontal;
+ bool vpg_ber_pattern;
+ } vpg_defs;
+#endif /* CONFIG_DEBUG_FS */
+
+ struct dw_mipi_dsi *master; /* dual-dsi master ptr */
+ struct dw_mipi_dsi *slave; /* dual-dsi slave ptr */
+
+ const struct dw_mipi_dsi_plat_data *plat_data;
+};
+
+/*
+ * Check if either a link to a master or slave is present
+ */
+static inline bool dw_mipi_is_dual_mode(struct dw_mipi_dsi *dsi)
+{
+ return dsi->slave || dsi->master;
+}
+
+/*
+ * The controller should generate 2 frames before
+ * preparing the peripheral.
+ */
+static void dw_mipi_dsi_wait_for_two_frames(const struct drm_display_mode *mode)
+{
+ int refresh, two_frames;
+
+ refresh = drm_mode_vrefresh(mode);
+ two_frames = DIV_ROUND_UP(MSEC_PER_SEC, refresh) * 2;
+ msleep(two_frames);
+}
+
+static inline struct dw_mipi_dsi *host_to_dsi(struct mipi_dsi_host *host)
+{
+ return container_of(host, struct dw_mipi_dsi, dsi_host);
+}
+
+static inline struct dw_mipi_dsi *bridge_to_dsi(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct dw_mipi_dsi, bridge);
+}
+
+static inline void dsi_write(struct dw_mipi_dsi *dsi, u32 reg, u32 val)
+{
+ writel(val, dsi->base + reg);
+}
+
+static inline u32 dsi_read(struct dw_mipi_dsi *dsi, u32 reg)
+{
+ return readl(dsi->base + reg);
+}
+
+static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
+ struct mipi_dsi_device *device)
+{
+ struct dw_mipi_dsi *dsi = host_to_dsi(host);
+ const struct dw_mipi_dsi_plat_data *pdata = dsi->plat_data;
+ struct drm_bridge *bridge;
+ int ret;
+
+ if (device->lanes > dsi->plat_data->max_data_lanes) {
+ dev_err(dsi->dev, "the number of data lanes(%u) is too many\n",
+ device->lanes);
+ return -EINVAL;
+ }
+
+ dsi->lanes = device->lanes;
+ dsi->channel = device->channel;
+ dsi->format = device->format;
+ dsi->mode_flags = device->mode_flags;
+
+ bridge = devm_drm_of_get_bridge(dsi->dev, dsi->dev->of_node, 1, 0);
+ if (IS_ERR(bridge))
+ return PTR_ERR(bridge);
+
+ dsi->panel_bridge = bridge;
+
+ drm_bridge_add(&dsi->bridge);
+
+ if (pdata->host_ops && pdata->host_ops->attach) {
+ ret = pdata->host_ops->attach(pdata->priv_data, device);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int dw_mipi_dsi_host_detach(struct mipi_dsi_host *host,
+ struct mipi_dsi_device *device)
+{
+ struct dw_mipi_dsi *dsi = host_to_dsi(host);
+ const struct dw_mipi_dsi_plat_data *pdata = dsi->plat_data;
+ int ret;
+
+ if (pdata->host_ops && pdata->host_ops->detach) {
+ ret = pdata->host_ops->detach(pdata->priv_data, device);
+ if (ret < 0)
+ return ret;
+ }
+
+ drm_of_panel_bridge_remove(host->dev->of_node, 1, 0);
+
+ drm_bridge_remove(&dsi->bridge);
+
+ return 0;
+}
+
+static void dw_mipi_message_config(struct dw_mipi_dsi *dsi,
+ const struct mipi_dsi_msg *msg)
+{
+ bool lpm = msg->flags & MIPI_DSI_MSG_USE_LPM;
+ u32 val = 0;
+
+ /*
+ * TODO dw drv improvements
+ * largest packet sizes during hfp or during vsa/vpb/vfp
+ * should be computed according to byte lane, lane number and only
+ * if sending lp cmds in high speed is enable (PHY_TXREQUESTCLKHS)
+ */
+ dsi_write(dsi, DSI_DPI_LP_CMD_TIM, OUTVACT_LPCMD_TIME(16)
+ | INVACT_LPCMD_TIME(4));
+
+ if (msg->flags & MIPI_DSI_MSG_REQ_ACK)
+ val |= ACK_RQST_EN;
+ if (lpm)
+ val |= CMD_MODE_ALL_LP;
+
+ dsi_write(dsi, DSI_CMD_MODE_CFG, val);
+
+ val = dsi_read(dsi, DSI_VID_MODE_CFG);
+ if (lpm)
+ val |= ENABLE_LOW_POWER_CMD;
+ else
+ val &= ~ENABLE_LOW_POWER_CMD;
+ dsi_write(dsi, DSI_VID_MODE_CFG, val);
+}
+
+static int dw_mipi_dsi_gen_pkt_hdr_write(struct dw_mipi_dsi *dsi, u32 hdr_val)
+{
+ int ret;
+ u32 val, mask;
+
+ ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
+ val, !(val & GEN_CMD_FULL), 1000,
+ CMD_PKT_STATUS_TIMEOUT_US);
+ if (ret) {
+ dev_err(dsi->dev, "failed to get available command FIFO\n");
+ return ret;
+ }
+
+ dsi_write(dsi, DSI_GEN_HDR, hdr_val);
+
+ mask = GEN_CMD_EMPTY | GEN_PLD_W_EMPTY;
+ ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
+ val, (val & mask) == mask,
+ 1000, CMD_PKT_STATUS_TIMEOUT_US);
+ if (ret) {
+ dev_err(dsi->dev, "failed to write command FIFO\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int dw_mipi_dsi_write(struct dw_mipi_dsi *dsi,
+ const struct mipi_dsi_packet *packet)
+{
+ const u8 *tx_buf = packet->payload;
+ int len = packet->payload_length, pld_data_bytes = sizeof(u32), ret;
+ __le32 word;
+ u32 val;
+
+ while (len) {
+ if (len < pld_data_bytes) {
+ word = 0;
+ memcpy(&word, tx_buf, len);
+ dsi_write(dsi, DSI_GEN_PLD_DATA, le32_to_cpu(word));
+ len = 0;
+ } else {
+ memcpy(&word, tx_buf, pld_data_bytes);
+ dsi_write(dsi, DSI_GEN_PLD_DATA, le32_to_cpu(word));
+ tx_buf += pld_data_bytes;
+ len -= pld_data_bytes;
+ }
+
+ ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
+ val, !(val & GEN_PLD_W_FULL), 1000,
+ CMD_PKT_STATUS_TIMEOUT_US);
+ if (ret) {
+ dev_err(dsi->dev,
+ "failed to get available write payload FIFO\n");
+ return ret;
+ }
+ }
+
+ word = 0;
+ memcpy(&word, packet->header, sizeof(packet->header));
+ return dw_mipi_dsi_gen_pkt_hdr_write(dsi, le32_to_cpu(word));
+}
+
+static int dw_mipi_dsi_read(struct dw_mipi_dsi *dsi,
+ const struct mipi_dsi_msg *msg)
+{
+ int i, j, ret, len = msg->rx_len;
+ u8 *buf = msg->rx_buf;
+ u32 val;
+
+ /* Wait end of the read operation */
+ ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
+ val, !(val & GEN_RD_CMD_BUSY),
+ 1000, CMD_PKT_STATUS_TIMEOUT_US);
+ if (ret) {
+ dev_err(dsi->dev, "Timeout during read operation\n");
+ return ret;
+ }
+
+ for (i = 0; i < len; i += 4) {
+ /* Read fifo must not be empty before all bytes are read */
+ ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
+ val, !(val & GEN_PLD_R_EMPTY),
+ 1000, CMD_PKT_STATUS_TIMEOUT_US);
+ if (ret) {
+ dev_err(dsi->dev, "Read payload FIFO is empty\n");
+ return ret;
+ }
+
+ val = dsi_read(dsi, DSI_GEN_PLD_DATA);
+ for (j = 0; j < 4 && j + i < len; j++)
+ buf[i + j] = val >> (8 * j);
+ }
+
+ return ret;
+}
+
+static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host,
+ const struct mipi_dsi_msg *msg)
+{
+ struct dw_mipi_dsi *dsi = host_to_dsi(host);
+ struct mipi_dsi_packet packet;
+ int ret, nb_bytes;
+
+ ret = mipi_dsi_create_packet(&packet, msg);
+ if (ret) {
+ dev_err(dsi->dev, "failed to create packet: %d\n", ret);
+ return ret;
+ }
+
+ dw_mipi_message_config(dsi, msg);
+ if (dsi->slave)
+ dw_mipi_message_config(dsi->slave, msg);
+
+ ret = dw_mipi_dsi_write(dsi, &packet);
+ if (ret)
+ return ret;
+ if (dsi->slave) {
+ ret = dw_mipi_dsi_write(dsi->slave, &packet);
+ if (ret)
+ return ret;
+ }
+
+ if (msg->rx_buf && msg->rx_len) {
+ ret = dw_mipi_dsi_read(dsi, msg);
+ if (ret)
+ return ret;
+ nb_bytes = msg->rx_len;
+ } else {
+ nb_bytes = packet.size;
+ }
+
+ return nb_bytes;
+}
+
+static const struct mipi_dsi_host_ops dw_mipi_dsi_host_ops = {
+ .attach = dw_mipi_dsi_host_attach,
+ .detach = dw_mipi_dsi_host_detach,
+ .transfer = dw_mipi_dsi_host_transfer,
+};
+
+static void dw_mipi_dsi_video_mode_config(struct dw_mipi_dsi *dsi)
+{
+ u32 val;
+
+ /*
+ * TODO dw drv improvements
+ * enabling low power is panel-dependent, we should use the
+ * panel configuration here...
+ */
+ val = ENABLE_LOW_POWER;
+
+ if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
+ val |= VID_MODE_TYPE_BURST;
+ else if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+ val |= VID_MODE_TYPE_NON_BURST_SYNC_PULSES;
+ else
+ val |= VID_MODE_TYPE_NON_BURST_SYNC_EVENTS;
+
+#ifdef CONFIG_DEBUG_FS
+ if (dsi->vpg_defs.vpg) {
+ val |= VID_MODE_VPG_ENABLE;
+ val |= dsi->vpg_defs.vpg_horizontal ?
+ VID_MODE_VPG_HORIZONTAL : 0;
+ val |= dsi->vpg_defs.vpg_ber_pattern ? VID_MODE_VPG_MODE : 0;
+ }
+#endif /* CONFIG_DEBUG_FS */
+
+ dsi_write(dsi, DSI_VID_MODE_CFG, val);
+}
+
+static void dw_mipi_dsi_set_mode(struct dw_mipi_dsi *dsi,
+ unsigned long mode_flags)
+{
+ u32 val;
+
+ dsi_write(dsi, DSI_PWR_UP, RESET);
+
+ if (mode_flags & MIPI_DSI_MODE_VIDEO) {
+ dsi_write(dsi, DSI_MODE_CFG, ENABLE_VIDEO_MODE);
+ dw_mipi_dsi_video_mode_config(dsi);
+ } else {
+ dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE);
+ }
+
+ val = PHY_TXREQUESTCLKHS;
+ if (dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)
+ val |= AUTO_CLKLANE_CTRL;
+ dsi_write(dsi, DSI_LPCLK_CTRL, val);
+
+ dsi_write(dsi, DSI_PWR_UP, POWERUP);
+}
+
+static void dw_mipi_dsi_disable(struct dw_mipi_dsi *dsi)
+{
+ dsi_write(dsi, DSI_PWR_UP, RESET);
+ dsi_write(dsi, DSI_PHY_RSTZ, PHY_RSTZ);
+}
+
+static void dw_mipi_dsi_init(struct dw_mipi_dsi *dsi)
+{
+ const struct dw_mipi_dsi_phy_ops *phy_ops = dsi->plat_data->phy_ops;
+ unsigned int esc_rate; /* in MHz */
+ u32 esc_clk_division;
+ int ret;
+
+ /*
+ * The maximum permitted escape clock is 20MHz and it is derived from
+ * lanebyteclk, which is running at "lane_mbps / 8".
+ */
+ if (phy_ops->get_esc_clk_rate) {
+ ret = phy_ops->get_esc_clk_rate(dsi->plat_data->priv_data,
+ &esc_rate);
+ if (ret)
+ DRM_DEBUG_DRIVER("Phy get_esc_clk_rate() failed\n");
+ } else
+ esc_rate = 20; /* Default to 20MHz */
+
+ /*
+ * We want :
+ * (lane_mbps >> 3) / esc_clk_division < X
+ * which is:
+ * (lane_mbps >> 3) / X > esc_clk_division
+ */
+ esc_clk_division = (dsi->lane_mbps >> 3) / esc_rate + 1;
+
+ dsi_write(dsi, DSI_PWR_UP, RESET);
+
+ /*
+ * TODO dw drv improvements
+ * timeout clock division should be computed with the
+ * high speed transmission counter timeout and byte lane...
+ */
+ dsi_write(dsi, DSI_CLKMGR_CFG, TO_CLK_DIVISION(10) |
+ TX_ESC_CLK_DIVISION(esc_clk_division));
+}
+
+static void dw_mipi_dsi_dpi_config(struct dw_mipi_dsi *dsi,
+ const struct drm_display_mode *mode)
+{
+ u32 val = 0, color = 0;
+
+ switch (dsi->format) {
+ case MIPI_DSI_FMT_RGB888:
+ color = DPI_COLOR_CODING_24BIT;
+ break;
+ case MIPI_DSI_FMT_RGB666:
+ color = DPI_COLOR_CODING_18BIT_2 | LOOSELY18_EN;
+ break;
+ case MIPI_DSI_FMT_RGB666_PACKED:
+ color = DPI_COLOR_CODING_18BIT_1;
+ break;
+ case MIPI_DSI_FMT_RGB565:
+ color = DPI_COLOR_CODING_16BIT_1;
+ break;
+ }
+
+ if (mode->flags & DRM_MODE_FLAG_NVSYNC)
+ val |= VSYNC_ACTIVE_LOW;
+ if (mode->flags & DRM_MODE_FLAG_NHSYNC)
+ val |= HSYNC_ACTIVE_LOW;
+
+ dsi_write(dsi, DSI_DPI_VCID, DPI_VCID(dsi->channel));
+ dsi_write(dsi, DSI_DPI_COLOR_CODING, color);
+ dsi_write(dsi, DSI_DPI_CFG_POL, val);
+}
+
+static void dw_mipi_dsi_packet_handler_config(struct dw_mipi_dsi *dsi)
+{
+ dsi_write(dsi, DSI_PCKHDL_CFG, CRC_RX_EN | ECC_RX_EN | BTA_EN);
+}
+
+static void dw_mipi_dsi_video_packet_config(struct dw_mipi_dsi *dsi,
+ const struct drm_display_mode *mode)
+{
+ /*
+ * TODO dw drv improvements
+ * only burst mode is supported here. For non-burst video modes,
+ * we should compute DSI_VID_PKT_SIZE, DSI_VCCR.NUMC &
+ * DSI_VNPCR.NPSIZE... especially because this driver supports
+ * non-burst video modes, see dw_mipi_dsi_video_mode_config()...
+ */
+
+ dsi_write(dsi, DSI_VID_PKT_SIZE,
+ dw_mipi_is_dual_mode(dsi) ?
+ VID_PKT_SIZE(mode->hdisplay / 2) :
+ VID_PKT_SIZE(mode->hdisplay));
+}
+
+static void dw_mipi_dsi_command_mode_config(struct dw_mipi_dsi *dsi)
+{
+ /*
+ * TODO dw drv improvements
+ * compute high speed transmission counter timeout according
+ * to the timeout clock division (TO_CLK_DIVISION) and byte lane...
+ */
+ dsi_write(dsi, DSI_TO_CNT_CFG, HSTX_TO_CNT(1000) | LPRX_TO_CNT(1000));
+ /*
+ * TODO dw drv improvements
+ * the Bus-Turn-Around Timeout Counter should be computed
+ * according to byte lane...
+ */
+ dsi_write(dsi, DSI_BTA_TO_CNT, 0xd00);
+ dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE);
+}
+
+/* Get lane byte clock cycles. */
+static u32 dw_mipi_dsi_get_hcomponent_lbcc(struct dw_mipi_dsi *dsi,
+ const struct drm_display_mode *mode,
+ u32 hcomponent)
+{
+ u32 frac, lbcc;
+
+ lbcc = hcomponent * dsi->lane_mbps * MSEC_PER_SEC / 8;
+
+ frac = lbcc % mode->clock;
+ lbcc = lbcc / mode->clock;
+ if (frac)
+ lbcc++;
+
+ return lbcc;
+}
+
+static void dw_mipi_dsi_line_timer_config(struct dw_mipi_dsi *dsi,
+ const struct drm_display_mode *mode)
+{
+ u32 htotal, hsa, hbp, lbcc;
+
+ htotal = mode->htotal;
+ hsa = mode->hsync_end - mode->hsync_start;
+ hbp = mode->htotal - mode->hsync_end;
+
+ /*
+ * TODO dw drv improvements
+ * computations below may be improved...
+ */
+ lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, htotal);
+ dsi_write(dsi, DSI_VID_HLINE_TIME, lbcc);
+
+ lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, hsa);
+ dsi_write(dsi, DSI_VID_HSA_TIME, lbcc);
+
+ lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, hbp);
+ dsi_write(dsi, DSI_VID_HBP_TIME, lbcc);
+}
+
+static void dw_mipi_dsi_vertical_timing_config(struct dw_mipi_dsi *dsi,
+ const struct drm_display_mode *mode)
+{
+ u32 vactive, vsa, vfp, vbp;
+
+ vactive = mode->vdisplay;
+ vsa = mode->vsync_end - mode->vsync_start;
+ vfp = mode->vsync_start - mode->vdisplay;
+ vbp = mode->vtotal - mode->vsync_end;
+
+ dsi_write(dsi, DSI_VID_VACTIVE_LINES, vactive);
+ dsi_write(dsi, DSI_VID_VSA_LINES, vsa);
+ dsi_write(dsi, DSI_VID_VFP_LINES, vfp);
+ dsi_write(dsi, DSI_VID_VBP_LINES, vbp);
+}
+
+static void dw_mipi_dsi_dphy_timing_config(struct dw_mipi_dsi *dsi)
+{
+ const struct dw_mipi_dsi_phy_ops *phy_ops = dsi->plat_data->phy_ops;
+ struct dw_mipi_dsi_dphy_timing timing;
+ u32 hw_version;
+ int ret;
+
+ ret = phy_ops->get_timing(dsi->plat_data->priv_data,
+ dsi->lane_mbps, &timing);
+ if (ret)
+ DRM_DEV_ERROR(dsi->dev, "Retrieving phy timings failed\n");
+
+ /*
+ * TODO dw drv improvements
+ * data & clock lane timers should be computed according to panel
+ * blankings and to the automatic clock lane control mode...
+ * note: DSI_PHY_TMR_CFG.MAX_RD_TIME should be in line with
+ * DSI_CMD_MODE_CFG.MAX_RD_PKT_SIZE_LP (see CMD_MODE_ALL_LP)
+ */
+
+ hw_version = dsi_read(dsi, DSI_VERSION) & VERSION;
+
+ if (hw_version >= HWVER_131) {
+ dsi_write(dsi, DSI_PHY_TMR_CFG,
+ PHY_HS2LP_TIME_V131(timing.data_hs2lp) |
+ PHY_LP2HS_TIME_V131(timing.data_lp2hs));
+ dsi_write(dsi, DSI_PHY_TMR_RD_CFG, MAX_RD_TIME_V131(10000));
+ } else {
+ dsi_write(dsi, DSI_PHY_TMR_CFG,
+ PHY_HS2LP_TIME(timing.data_hs2lp) |
+ PHY_LP2HS_TIME(timing.data_lp2hs) |
+ MAX_RD_TIME(10000));
+ }
+
+ dsi_write(dsi, DSI_PHY_TMR_LPCLK_CFG,
+ PHY_CLKHS2LP_TIME(timing.clk_hs2lp) |
+ PHY_CLKLP2HS_TIME(timing.clk_lp2hs));
+}
+
+static void dw_mipi_dsi_dphy_interface_config(struct dw_mipi_dsi *dsi)
+{
+ /*
+ * TODO dw drv improvements
+ * stop wait time should be the maximum between host dsi
+ * and panel stop wait times
+ */
+ dsi_write(dsi, DSI_PHY_IF_CFG, PHY_STOP_WAIT_TIME(0x20) |
+ N_LANES(dsi->lanes));
+}
+
+static void dw_mipi_dsi_dphy_init(struct dw_mipi_dsi *dsi)
+{
+ /* Clear PHY state */
+ dsi_write(dsi, DSI_PHY_RSTZ, PHY_DISFORCEPLL | PHY_DISABLECLK
+ | PHY_RSTZ | PHY_SHUTDOWNZ);
+ dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
+ dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLR);
+ dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
+}
+
+static void dw_mipi_dsi_dphy_enable(struct dw_mipi_dsi *dsi)
+{
+ u32 val;
+ int ret;
+
+ dsi_write(dsi, DSI_PHY_RSTZ, PHY_ENFORCEPLL | PHY_ENABLECLK |
+ PHY_UNRSTZ | PHY_UNSHUTDOWNZ);
+
+ ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS, val,
+ val & PHY_LOCK, 1000, PHY_STATUS_TIMEOUT_US);
+ if (ret)
+ DRM_DEBUG_DRIVER("failed to wait phy lock state\n");
+
+ ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS,
+ val, val & PHY_STOP_STATE_CLK_LANE, 1000,
+ PHY_STATUS_TIMEOUT_US);
+ if (ret)
+ DRM_DEBUG_DRIVER("failed to wait phy clk lane stop state\n");
+}
+
+static void dw_mipi_dsi_clear_err(struct dw_mipi_dsi *dsi)
+{
+ dsi_read(dsi, DSI_INT_ST0);
+ dsi_read(dsi, DSI_INT_ST1);
+ dsi_write(dsi, DSI_INT_MSK0, 0);
+ dsi_write(dsi, DSI_INT_MSK1, 0);
+}
+
+static void dw_mipi_dsi_bridge_post_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge);
+ const struct dw_mipi_dsi_phy_ops *phy_ops = dsi->plat_data->phy_ops;
+
+ /*
+ * Switch to command mode before panel-bridge post_disable &
+ * panel unprepare.
+ * Note: panel-bridge disable & panel disable has been called
+ * before by the drm framework.
+ */
+ dw_mipi_dsi_set_mode(dsi, 0);
+
+ /*
+ * TODO Only way found to call panel-bridge post_disable &
+ * panel unprepare before the dsi "final" disable...
+ * This needs to be fixed in the drm_bridge framework and the API
+ * needs to be updated to manage our own call chains...
+ */
+ if (dsi->panel_bridge->funcs->post_disable)
+ dsi->panel_bridge->funcs->post_disable(dsi->panel_bridge);
+
+ if (phy_ops->power_off)
+ phy_ops->power_off(dsi->plat_data->priv_data);
+
+ if (dsi->slave) {
+ dw_mipi_dsi_disable(dsi->slave);
+ clk_disable_unprepare(dsi->slave->pclk);
+ pm_runtime_put(dsi->slave->dev);
+ }
+ dw_mipi_dsi_disable(dsi);
+
+ clk_disable_unprepare(dsi->pclk);
+ pm_runtime_put(dsi->dev);
+}
+
+static unsigned int dw_mipi_dsi_get_lanes(struct dw_mipi_dsi *dsi)
+{
+ /* this instance is the slave, so add the master's lanes */
+ if (dsi->master)
+ return dsi->master->lanes + dsi->lanes;
+
+ /* this instance is the master, so add the slave's lanes */
+ if (dsi->slave)
+ return dsi->lanes + dsi->slave->lanes;
+
+ /* single-dsi, so no other instance to consider */
+ return dsi->lanes;
+}
+
+static void dw_mipi_dsi_mode_set(struct dw_mipi_dsi *dsi,
+ const struct drm_display_mode *adjusted_mode)
+{
+ const struct dw_mipi_dsi_phy_ops *phy_ops = dsi->plat_data->phy_ops;
+ void *priv_data = dsi->plat_data->priv_data;
+ int ret;
+ u32 lanes = dw_mipi_dsi_get_lanes(dsi);
+
+ clk_prepare_enable(dsi->pclk);
+
+ ret = phy_ops->get_lane_mbps(priv_data, adjusted_mode, dsi->mode_flags,
+ lanes, dsi->format, &dsi->lane_mbps);
+ if (ret)
+ DRM_DEBUG_DRIVER("Phy get_lane_mbps() failed\n");
+
+ pm_runtime_get_sync(dsi->dev);
+ dw_mipi_dsi_init(dsi);
+ dw_mipi_dsi_dpi_config(dsi, adjusted_mode);
+ dw_mipi_dsi_packet_handler_config(dsi);
+ dw_mipi_dsi_video_mode_config(dsi);
+ dw_mipi_dsi_video_packet_config(dsi, adjusted_mode);
+ dw_mipi_dsi_command_mode_config(dsi);
+ dw_mipi_dsi_line_timer_config(dsi, adjusted_mode);
+ dw_mipi_dsi_vertical_timing_config(dsi, adjusted_mode);
+
+ dw_mipi_dsi_dphy_init(dsi);
+ dw_mipi_dsi_dphy_timing_config(dsi);
+ dw_mipi_dsi_dphy_interface_config(dsi);
+
+ dw_mipi_dsi_clear_err(dsi);
+
+ ret = phy_ops->init(priv_data);
+ if (ret)
+ DRM_DEBUG_DRIVER("Phy init() failed\n");
+
+ dw_mipi_dsi_dphy_enable(dsi);
+
+ dw_mipi_dsi_wait_for_two_frames(adjusted_mode);
+
+ /* Switch to cmd mode for panel-bridge pre_enable & panel prepare */
+ dw_mipi_dsi_set_mode(dsi, 0);
+
+ if (phy_ops->power_on)
+ phy_ops->power_on(dsi->plat_data->priv_data);
+}
+
+static void dw_mipi_dsi_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge);
+
+ dw_mipi_dsi_mode_set(dsi, adjusted_mode);
+ if (dsi->slave)
+ dw_mipi_dsi_mode_set(dsi->slave, adjusted_mode);
+}
+
+static void dw_mipi_dsi_bridge_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge);
+
+ /* Switch to video mode for panel-bridge enable & panel enable */
+ dw_mipi_dsi_set_mode(dsi, MIPI_DSI_MODE_VIDEO);
+ if (dsi->slave)
+ dw_mipi_dsi_set_mode(dsi->slave, MIPI_DSI_MODE_VIDEO);
+}
+
+static enum drm_mode_status
+dw_mipi_dsi_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge);
+ const struct dw_mipi_dsi_plat_data *pdata = dsi->plat_data;
+ enum drm_mode_status mode_status = MODE_OK;
+
+ if (pdata->mode_valid)
+ mode_status = pdata->mode_valid(pdata->priv_data, mode,
+ dsi->mode_flags,
+ dw_mipi_dsi_get_lanes(dsi),
+ dsi->format);
+
+ return mode_status;
+}
+
+static int dw_mipi_dsi_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge);
+
+ if (!bridge->encoder) {
+ DRM_ERROR("Parent encoder object not found\n");
+ return -ENODEV;
+ }
+
+ /* Set the encoder type as caller does not know it */
+ bridge->encoder->encoder_type = DRM_MODE_ENCODER_DSI;
+
+ /* Attach the panel-bridge to the dsi bridge */
+ return drm_bridge_attach(bridge->encoder, dsi->panel_bridge, bridge,
+ flags);
+}
+
+static const struct drm_bridge_funcs dw_mipi_dsi_bridge_funcs = {
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .atomic_enable = dw_mipi_dsi_bridge_atomic_enable,
+ .atomic_post_disable = dw_mipi_dsi_bridge_post_atomic_disable,
+ .mode_set = dw_mipi_dsi_bridge_mode_set,
+ .mode_valid = dw_mipi_dsi_bridge_mode_valid,
+ .attach = dw_mipi_dsi_bridge_attach,
+};
+
+#ifdef CONFIG_DEBUG_FS
+
+static int dw_mipi_dsi_debugfs_write(void *data, u64 val)
+{
+ struct debugfs_entries *vpg = data;
+ struct dw_mipi_dsi *dsi;
+ u32 mode_cfg;
+
+ if (!vpg)
+ return -ENODEV;
+
+ dsi = vpg->dsi;
+
+ *vpg->reg = (bool)val;
+
+ mode_cfg = dsi_read(dsi, DSI_VID_MODE_CFG);
+
+ if (*vpg->reg)
+ mode_cfg |= vpg->mask;
+ else
+ mode_cfg &= ~vpg->mask;
+
+ dsi_write(dsi, DSI_VID_MODE_CFG, mode_cfg);
+
+ return 0;
+}
+
+static int dw_mipi_dsi_debugfs_show(void *data, u64 *val)
+{
+ struct debugfs_entries *vpg = data;
+
+ if (!vpg)
+ return -ENODEV;
+
+ *val = *vpg->reg;
+
+ return 0;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(fops_x32, dw_mipi_dsi_debugfs_show,
+ dw_mipi_dsi_debugfs_write, "%llu\n");
+
+static void debugfs_create_files(void *data)
+{
+ struct dw_mipi_dsi *dsi = data;
+ struct debugfs_entries debugfs[] = {
+ REGISTER(vpg, VID_MODE_VPG_ENABLE, dsi),
+ REGISTER(vpg_horizontal, VID_MODE_VPG_HORIZONTAL, dsi),
+ REGISTER(vpg_ber_pattern, VID_MODE_VPG_MODE, dsi),
+ };
+ int i;
+
+ dsi->debugfs_vpg = kmemdup(debugfs, sizeof(debugfs), GFP_KERNEL);
+ if (!dsi->debugfs_vpg)
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(debugfs); i++)
+ debugfs_create_file(dsi->debugfs_vpg[i].name, 0644,
+ dsi->debugfs, &dsi->debugfs_vpg[i],
+ &fops_x32);
+}
+
+static void dw_mipi_dsi_debugfs_init(struct dw_mipi_dsi *dsi)
+{
+ dsi->debugfs = debugfs_create_dir(dev_name(dsi->dev), NULL);
+ if (IS_ERR(dsi->debugfs)) {
+ dev_err(dsi->dev, "failed to create debugfs root\n");
+ return;
+ }
+
+ debugfs_create_files(dsi);
+}
+
+static void dw_mipi_dsi_debugfs_remove(struct dw_mipi_dsi *dsi)
+{
+ debugfs_remove_recursive(dsi->debugfs);
+ kfree(dsi->debugfs_vpg);
+}
+
+#else
+
+static void dw_mipi_dsi_debugfs_init(struct dw_mipi_dsi *dsi) { }
+static void dw_mipi_dsi_debugfs_remove(struct dw_mipi_dsi *dsi) { }
+
+#endif /* CONFIG_DEBUG_FS */
+
+static struct dw_mipi_dsi *
+__dw_mipi_dsi_probe(struct platform_device *pdev,
+ const struct dw_mipi_dsi_plat_data *plat_data)
+{
+ struct device *dev = &pdev->dev;
+ struct reset_control *apb_rst;
+ struct dw_mipi_dsi *dsi;
+ int ret;
+
+ dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
+ if (!dsi)
+ return ERR_PTR(-ENOMEM);
+
+ dsi->dev = dev;
+ dsi->plat_data = plat_data;
+
+ if (!plat_data->phy_ops->init || !plat_data->phy_ops->get_lane_mbps ||
+ !plat_data->phy_ops->get_timing) {
+ DRM_ERROR("Phy not properly configured\n");
+ return ERR_PTR(-ENODEV);
+ }
+
+ if (!plat_data->base) {
+ dsi->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(dsi->base))
+ return ERR_PTR(-ENODEV);
+
+ } else {
+ dsi->base = plat_data->base;
+ }
+
+ dsi->pclk = devm_clk_get(dev, "pclk");
+ if (IS_ERR(dsi->pclk)) {
+ ret = PTR_ERR(dsi->pclk);
+ dev_err(dev, "Unable to get pclk: %d\n", ret);
+ return ERR_PTR(ret);
+ }
+
+ /*
+ * Note that the reset was not defined in the initial device tree, so
+ * we have to be prepared for it not being found.
+ */
+ apb_rst = devm_reset_control_get_optional_exclusive(dev, "apb");
+ if (IS_ERR(apb_rst)) {
+ ret = PTR_ERR(apb_rst);
+
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "Unable to get reset control: %d\n", ret);
+
+ return ERR_PTR(ret);
+ }
+
+ if (apb_rst) {
+ ret = clk_prepare_enable(dsi->pclk);
+ if (ret) {
+ dev_err(dev, "%s: Failed to enable pclk\n", __func__);
+ return ERR_PTR(ret);
+ }
+
+ reset_control_assert(apb_rst);
+ usleep_range(10, 20);
+ reset_control_deassert(apb_rst);
+
+ clk_disable_unprepare(dsi->pclk);
+ }
+
+ dw_mipi_dsi_debugfs_init(dsi);
+ pm_runtime_enable(dev);
+
+ dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
+ dsi->dsi_host.dev = dev;
+ ret = mipi_dsi_host_register(&dsi->dsi_host);
+ if (ret) {
+ dev_err(dev, "Failed to register MIPI host: %d\n", ret);
+ pm_runtime_disable(dev);
+ dw_mipi_dsi_debugfs_remove(dsi);
+ return ERR_PTR(ret);
+ }
+
+ dsi->bridge.driver_private = dsi;
+ dsi->bridge.funcs = &dw_mipi_dsi_bridge_funcs;
+#ifdef CONFIG_OF
+ dsi->bridge.of_node = pdev->dev.of_node;
+#endif
+
+ return dsi;
+}
+
+static void __dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi)
+{
+ mipi_dsi_host_unregister(&dsi->dsi_host);
+
+ pm_runtime_disable(dsi->dev);
+ dw_mipi_dsi_debugfs_remove(dsi);
+}
+
+void dw_mipi_dsi_set_slave(struct dw_mipi_dsi *dsi, struct dw_mipi_dsi *slave)
+{
+ /* introduce controllers to each other */
+ dsi->slave = slave;
+ dsi->slave->master = dsi;
+
+ /* migrate settings for already attached displays */
+ dsi->slave->lanes = dsi->lanes;
+ dsi->slave->channel = dsi->channel;
+ dsi->slave->format = dsi->format;
+ dsi->slave->mode_flags = dsi->mode_flags;
+}
+EXPORT_SYMBOL_GPL(dw_mipi_dsi_set_slave);
+
+/*
+ * Probe/remove API, used from platforms based on the DRM bridge API.
+ */
+struct dw_mipi_dsi *
+dw_mipi_dsi_probe(struct platform_device *pdev,
+ const struct dw_mipi_dsi_plat_data *plat_data)
+{
+ return __dw_mipi_dsi_probe(pdev, plat_data);
+}
+EXPORT_SYMBOL_GPL(dw_mipi_dsi_probe);
+
+void dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi)
+{
+ __dw_mipi_dsi_remove(dsi);
+}
+EXPORT_SYMBOL_GPL(dw_mipi_dsi_remove);
+
+/*
+ * Bind/unbind API, used from platforms based on the component framework.
+ */
+int dw_mipi_dsi_bind(struct dw_mipi_dsi *dsi, struct drm_encoder *encoder)
+{
+ return drm_bridge_attach(encoder, &dsi->bridge, NULL, 0);
+}
+EXPORT_SYMBOL_GPL(dw_mipi_dsi_bind);
+
+void dw_mipi_dsi_unbind(struct dw_mipi_dsi *dsi)
+{
+}
+EXPORT_SYMBOL_GPL(dw_mipi_dsi_unbind);
+
+MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
+MODULE_AUTHOR("Philippe Cornu <philippe.cornu@st.com>");
+MODULE_DESCRIPTION("DW MIPI DSI host controller driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:dw-mipi-dsi");
diff --git a/drivers/gpu/drm/bridge/tc358762.c b/drivers/gpu/drm/bridge/tc358762.c
new file mode 100644
index 000000000..8db981e77
--- /dev/null
+++ b/drivers/gpu/drm/bridge/tc358762.c
@@ -0,0 +1,270 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Marek Vasut <marex@denx.de>
+ *
+ * Based on tc358764.c by
+ * Andrzej Hajda <a.hajda@samsung.com>
+ * Maciej Purski <m.purski@samsung.com>
+ *
+ * Based on rpi_touchscreen.c by
+ * Eric Anholt <eric@anholt.net>
+ */
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/of_graph.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+/* PPI layer registers */
+#define PPI_STARTPPI 0x0104 /* START control bit */
+#define PPI_LPTXTIMECNT 0x0114 /* LPTX timing signal */
+#define PPI_D0S_ATMR 0x0144
+#define PPI_D1S_ATMR 0x0148
+#define PPI_D0S_CLRSIPOCOUNT 0x0164 /* Assertion timer for Lane 0 */
+#define PPI_D1S_CLRSIPOCOUNT 0x0168 /* Assertion timer for Lane 1 */
+#define PPI_START_FUNCTION 1
+
+/* DSI layer registers */
+#define DSI_STARTDSI 0x0204 /* START control bit of DSI-TX */
+#define DSI_LANEENABLE 0x0210 /* Enables each lane */
+#define DSI_RX_START 1
+
+/* LCDC/DPI Host Registers */
+#define LCDCTRL 0x0420
+
+/* SPI Master Registers */
+#define SPICMR 0x0450
+#define SPITCR 0x0454
+
+/* System Controller Registers */
+#define SYSCTRL 0x0464
+
+/* System registers */
+#define LPX_PERIOD 3
+
+/* Lane enable PPI and DSI register bits */
+#define LANEENABLE_CLEN BIT(0)
+#define LANEENABLE_L0EN BIT(1)
+#define LANEENABLE_L1EN BIT(2)
+
+struct tc358762 {
+ struct device *dev;
+ struct drm_bridge bridge;
+ struct regulator *regulator;
+ struct drm_bridge *panel_bridge;
+ bool pre_enabled;
+ int error;
+};
+
+static int tc358762_clear_error(struct tc358762 *ctx)
+{
+ int ret = ctx->error;
+
+ ctx->error = 0;
+ return ret;
+}
+
+static void tc358762_write(struct tc358762 *ctx, u16 addr, u32 val)
+{
+ struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+ ssize_t ret;
+ u8 data[6];
+
+ if (ctx->error)
+ return;
+
+ data[0] = addr;
+ data[1] = addr >> 8;
+ data[2] = val;
+ data[3] = val >> 8;
+ data[4] = val >> 16;
+ data[5] = val >> 24;
+
+ ret = mipi_dsi_generic_write(dsi, data, sizeof(data));
+ if (ret < 0)
+ ctx->error = ret;
+}
+
+static inline struct tc358762 *bridge_to_tc358762(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct tc358762, bridge);
+}
+
+static int tc358762_init(struct tc358762 *ctx)
+{
+ tc358762_write(ctx, DSI_LANEENABLE,
+ LANEENABLE_L0EN | LANEENABLE_CLEN);
+ tc358762_write(ctx, PPI_D0S_CLRSIPOCOUNT, 5);
+ tc358762_write(ctx, PPI_D1S_CLRSIPOCOUNT, 5);
+ tc358762_write(ctx, PPI_D0S_ATMR, 0);
+ tc358762_write(ctx, PPI_D1S_ATMR, 0);
+ tc358762_write(ctx, PPI_LPTXTIMECNT, LPX_PERIOD);
+
+ tc358762_write(ctx, SPICMR, 0x00);
+ tc358762_write(ctx, LCDCTRL, 0x00100150);
+ tc358762_write(ctx, SYSCTRL, 0x040f);
+ msleep(100);
+
+ tc358762_write(ctx, PPI_STARTPPI, PPI_START_FUNCTION);
+ tc358762_write(ctx, DSI_STARTDSI, DSI_RX_START);
+
+ msleep(100);
+
+ return tc358762_clear_error(ctx);
+}
+
+static void tc358762_post_disable(struct drm_bridge *bridge)
+{
+ struct tc358762 *ctx = bridge_to_tc358762(bridge);
+ int ret;
+
+ /*
+ * The post_disable hook might be called multiple times.
+ * We want to avoid regulator imbalance below.
+ */
+ if (!ctx->pre_enabled)
+ return;
+
+ ctx->pre_enabled = false;
+
+ ret = regulator_disable(ctx->regulator);
+ if (ret < 0)
+ dev_err(ctx->dev, "error disabling regulators (%d)\n", ret);
+}
+
+static void tc358762_pre_enable(struct drm_bridge *bridge)
+{
+ struct tc358762 *ctx = bridge_to_tc358762(bridge);
+ int ret;
+
+ ret = regulator_enable(ctx->regulator);
+ if (ret < 0)
+ dev_err(ctx->dev, "error enabling regulators (%d)\n", ret);
+
+ ret = tc358762_init(ctx);
+ if (ret < 0)
+ dev_err(ctx->dev, "error initializing bridge (%d)\n", ret);
+
+ ctx->pre_enabled = true;
+}
+
+static int tc358762_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct tc358762 *ctx = bridge_to_tc358762(bridge);
+
+ return drm_bridge_attach(bridge->encoder, ctx->panel_bridge,
+ bridge, flags);
+}
+
+static const struct drm_bridge_funcs tc358762_bridge_funcs = {
+ .post_disable = tc358762_post_disable,
+ .pre_enable = tc358762_pre_enable,
+ .attach = tc358762_attach,
+};
+
+static int tc358762_parse_dt(struct tc358762 *ctx)
+{
+ struct drm_bridge *panel_bridge;
+ struct device *dev = ctx->dev;
+
+ panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);
+ if (IS_ERR(panel_bridge))
+ return PTR_ERR(panel_bridge);
+
+ ctx->panel_bridge = panel_bridge;
+
+ return 0;
+}
+
+static int tc358762_configure_regulators(struct tc358762 *ctx)
+{
+ ctx->regulator = devm_regulator_get(ctx->dev, "vddc");
+ if (IS_ERR(ctx->regulator))
+ return PTR_ERR(ctx->regulator);
+
+ return 0;
+}
+
+static int tc358762_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct tc358762 *ctx;
+ int ret;
+
+ ctx = devm_kzalloc(dev, sizeof(struct tc358762), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ mipi_dsi_set_drvdata(dsi, ctx);
+
+ ctx->dev = dev;
+ ctx->pre_enabled = false;
+
+ /* TODO: Find out how to get dual-lane mode working */
+ dsi->lanes = 1;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
+ MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_VIDEO_HSE;
+
+ ret = tc358762_parse_dt(ctx);
+ if (ret < 0)
+ return ret;
+
+ ret = tc358762_configure_regulators(ctx);
+ if (ret < 0)
+ return ret;
+
+ ctx->bridge.funcs = &tc358762_bridge_funcs;
+ ctx->bridge.type = DRM_MODE_CONNECTOR_DPI;
+ ctx->bridge.of_node = dev->of_node;
+
+ drm_bridge_add(&ctx->bridge);
+
+ ret = mipi_dsi_attach(dsi);
+ if (ret < 0) {
+ drm_bridge_remove(&ctx->bridge);
+ dev_err(dev, "failed to attach dsi\n");
+ }
+
+ return ret;
+}
+
+static void tc358762_remove(struct mipi_dsi_device *dsi)
+{
+ struct tc358762 *ctx = mipi_dsi_get_drvdata(dsi);
+
+ mipi_dsi_detach(dsi);
+ drm_bridge_remove(&ctx->bridge);
+}
+
+static const struct of_device_id tc358762_of_match[] = {
+ { .compatible = "toshiba,tc358762" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, tc358762_of_match);
+
+static struct mipi_dsi_driver tc358762_driver = {
+ .probe = tc358762_probe,
+ .remove = tc358762_remove,
+ .driver = {
+ .name = "tc358762",
+ .of_match_table = tc358762_of_match,
+ },
+};
+module_mipi_dsi_driver(tc358762_driver);
+
+MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
+MODULE_DESCRIPTION("MIPI-DSI based Driver for TC358762 DSI/DPI Bridge");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/tc358764.c b/drivers/gpu/drm/bridge/tc358764.c
new file mode 100644
index 000000000..e0f583a88
--- /dev/null
+++ b/drivers/gpu/drm/bridge/tc358764.c
@@ -0,0 +1,412 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 Samsung Electronics Co., Ltd
+ *
+ * Authors:
+ * Andrzej Hajda <a.hajda@samsung.com>
+ * Maciej Purski <m.purski@samsung.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of_graph.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <drm/drm_print.h>
+
+#define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end))
+#define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))
+
+/* PPI layer registers */
+#define PPI_STARTPPI 0x0104 /* START control bit */
+#define PPI_LPTXTIMECNT 0x0114 /* LPTX timing signal */
+#define PPI_LANEENABLE 0x0134 /* Enables each lane */
+#define PPI_TX_RX_TA 0x013C /* BTA timing parameters */
+#define PPI_D0S_CLRSIPOCOUNT 0x0164 /* Assertion timer for Lane 0 */
+#define PPI_D1S_CLRSIPOCOUNT 0x0168 /* Assertion timer for Lane 1 */
+#define PPI_D2S_CLRSIPOCOUNT 0x016C /* Assertion timer for Lane 2 */
+#define PPI_D3S_CLRSIPOCOUNT 0x0170 /* Assertion timer for Lane 3 */
+#define PPI_START_FUNCTION 1
+
+/* DSI layer registers */
+#define DSI_STARTDSI 0x0204 /* START control bit of DSI-TX */
+#define DSI_LANEENABLE 0x0210 /* Enables each lane */
+#define DSI_RX_START 1
+
+/* Video path registers */
+#define VP_CTRL 0x0450 /* Video Path Control */
+#define VP_CTRL_MSF(v) FLD_VAL(v, 0, 0) /* Magic square in RGB666 */
+#define VP_CTRL_VTGEN(v) FLD_VAL(v, 4, 4) /* Use chip clock for timing */
+#define VP_CTRL_EVTMODE(v) FLD_VAL(v, 5, 5) /* Event mode */
+#define VP_CTRL_RGB888(v) FLD_VAL(v, 8, 8) /* RGB888 mode */
+#define VP_CTRL_VSDELAY(v) FLD_VAL(v, 31, 20) /* VSYNC delay */
+#define VP_CTRL_HSPOL BIT(17) /* Polarity of HSYNC signal */
+#define VP_CTRL_DEPOL BIT(18) /* Polarity of DE signal */
+#define VP_CTRL_VSPOL BIT(19) /* Polarity of VSYNC signal */
+#define VP_HTIM1 0x0454 /* Horizontal Timing Control 1 */
+#define VP_HTIM1_HBP(v) FLD_VAL(v, 24, 16)
+#define VP_HTIM1_HSYNC(v) FLD_VAL(v, 8, 0)
+#define VP_HTIM2 0x0458 /* Horizontal Timing Control 2 */
+#define VP_HTIM2_HFP(v) FLD_VAL(v, 24, 16)
+#define VP_HTIM2_HACT(v) FLD_VAL(v, 10, 0)
+#define VP_VTIM1 0x045C /* Vertical Timing Control 1 */
+#define VP_VTIM1_VBP(v) FLD_VAL(v, 23, 16)
+#define VP_VTIM1_VSYNC(v) FLD_VAL(v, 7, 0)
+#define VP_VTIM2 0x0460 /* Vertical Timing Control 2 */
+#define VP_VTIM2_VFP(v) FLD_VAL(v, 23, 16)
+#define VP_VTIM2_VACT(v) FLD_VAL(v, 10, 0)
+#define VP_VFUEN 0x0464 /* Video Frame Timing Update Enable */
+
+/* LVDS registers */
+#define LV_MX0003 0x0480 /* Mux input bit 0 to 3 */
+#define LV_MX0407 0x0484 /* Mux input bit 4 to 7 */
+#define LV_MX0811 0x0488 /* Mux input bit 8 to 11 */
+#define LV_MX1215 0x048C /* Mux input bit 12 to 15 */
+#define LV_MX1619 0x0490 /* Mux input bit 16 to 19 */
+#define LV_MX2023 0x0494 /* Mux input bit 20 to 23 */
+#define LV_MX2427 0x0498 /* Mux input bit 24 to 27 */
+#define LV_MX(b0, b1, b2, b3) (FLD_VAL(b0, 4, 0) | FLD_VAL(b1, 12, 8) | \
+ FLD_VAL(b2, 20, 16) | FLD_VAL(b3, 28, 24))
+
+/* Input bit numbers used in mux registers */
+enum {
+ LVI_R0,
+ LVI_R1,
+ LVI_R2,
+ LVI_R3,
+ LVI_R4,
+ LVI_R5,
+ LVI_R6,
+ LVI_R7,
+ LVI_G0,
+ LVI_G1,
+ LVI_G2,
+ LVI_G3,
+ LVI_G4,
+ LVI_G5,
+ LVI_G6,
+ LVI_G7,
+ LVI_B0,
+ LVI_B1,
+ LVI_B2,
+ LVI_B3,
+ LVI_B4,
+ LVI_B5,
+ LVI_B6,
+ LVI_B7,
+ LVI_HS,
+ LVI_VS,
+ LVI_DE,
+ LVI_L0
+};
+
+#define LV_CFG 0x049C /* LVDS Configuration */
+#define LV_PHY0 0x04A0 /* LVDS PHY 0 */
+#define LV_PHY0_RST(v) FLD_VAL(v, 22, 22) /* PHY reset */
+#define LV_PHY0_IS(v) FLD_VAL(v, 15, 14)
+#define LV_PHY0_ND(v) FLD_VAL(v, 4, 0) /* Frequency range select */
+#define LV_PHY0_PRBS_ON(v) FLD_VAL(v, 20, 16) /* Clock/Data Flag pins */
+
+/* System registers */
+#define SYS_RST 0x0504 /* System Reset */
+#define SYS_ID 0x0580 /* System ID */
+
+#define SYS_RST_I2CS BIT(0) /* Reset I2C-Slave controller */
+#define SYS_RST_I2CM BIT(1) /* Reset I2C-Master controller */
+#define SYS_RST_LCD BIT(2) /* Reset LCD controller */
+#define SYS_RST_BM BIT(3) /* Reset Bus Management controller */
+#define SYS_RST_DSIRX BIT(4) /* Reset DSI-RX and App controller */
+#define SYS_RST_REG BIT(5) /* Reset Register module */
+
+#define LPX_PERIOD 2
+#define TTA_SURE 3
+#define TTA_GET 0x20000
+
+/* Lane enable PPI and DSI register bits */
+#define LANEENABLE_CLEN BIT(0)
+#define LANEENABLE_L0EN BIT(1)
+#define LANEENABLE_L1EN BIT(2)
+#define LANEENABLE_L2EN BIT(3)
+#define LANEENABLE_L3EN BIT(4)
+
+/* LVCFG fields */
+#define LV_CFG_LVEN BIT(0)
+#define LV_CFG_LVDLINK BIT(1)
+#define LV_CFG_CLKPOL1 BIT(2)
+#define LV_CFG_CLKPOL2 BIT(3)
+
+static const char * const tc358764_supplies[] = {
+ "vddc", "vddio", "vddlvds"
+};
+
+struct tc358764 {
+ struct device *dev;
+ struct drm_bridge bridge;
+ struct drm_bridge *next_bridge;
+ struct regulator_bulk_data supplies[ARRAY_SIZE(tc358764_supplies)];
+ struct gpio_desc *gpio_reset;
+ int error;
+};
+
+static int tc358764_clear_error(struct tc358764 *ctx)
+{
+ int ret = ctx->error;
+
+ ctx->error = 0;
+ return ret;
+}
+
+static void tc358764_read(struct tc358764 *ctx, u16 addr, u32 *val)
+{
+ struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+ ssize_t ret;
+
+ if (ctx->error)
+ return;
+
+ cpu_to_le16s(&addr);
+ ret = mipi_dsi_generic_read(dsi, &addr, sizeof(addr), val, sizeof(*val));
+ if (ret >= 0)
+ le32_to_cpus(val);
+
+ dev_dbg(ctx->dev, "read: addr=0x%04x data=0x%08x\n", addr, *val);
+}
+
+static void tc358764_write(struct tc358764 *ctx, u16 addr, u32 val)
+{
+ struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+ ssize_t ret;
+ u8 data[6];
+
+ if (ctx->error)
+ return;
+
+ data[0] = addr;
+ data[1] = addr >> 8;
+ data[2] = val;
+ data[3] = val >> 8;
+ data[4] = val >> 16;
+ data[5] = val >> 24;
+
+ ret = mipi_dsi_generic_write(dsi, data, sizeof(data));
+ if (ret < 0)
+ ctx->error = ret;
+}
+
+static inline struct tc358764 *bridge_to_tc358764(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct tc358764, bridge);
+}
+
+static int tc358764_init(struct tc358764 *ctx)
+{
+ u32 v = 0;
+
+ tc358764_read(ctx, SYS_ID, &v);
+ if (ctx->error)
+ return tc358764_clear_error(ctx);
+ dev_info(ctx->dev, "ID: %#x\n", v);
+
+ /* configure PPI counters */
+ tc358764_write(ctx, PPI_TX_RX_TA, TTA_GET | TTA_SURE);
+ tc358764_write(ctx, PPI_LPTXTIMECNT, LPX_PERIOD);
+ tc358764_write(ctx, PPI_D0S_CLRSIPOCOUNT, 5);
+ tc358764_write(ctx, PPI_D1S_CLRSIPOCOUNT, 5);
+ tc358764_write(ctx, PPI_D2S_CLRSIPOCOUNT, 5);
+ tc358764_write(ctx, PPI_D3S_CLRSIPOCOUNT, 5);
+
+ /* enable four data lanes and clock lane */
+ tc358764_write(ctx, PPI_LANEENABLE, LANEENABLE_L3EN | LANEENABLE_L2EN |
+ LANEENABLE_L1EN | LANEENABLE_L0EN | LANEENABLE_CLEN);
+ tc358764_write(ctx, DSI_LANEENABLE, LANEENABLE_L3EN | LANEENABLE_L2EN |
+ LANEENABLE_L1EN | LANEENABLE_L0EN | LANEENABLE_CLEN);
+
+ /* start */
+ tc358764_write(ctx, PPI_STARTPPI, PPI_START_FUNCTION);
+ tc358764_write(ctx, DSI_STARTDSI, DSI_RX_START);
+
+ /* configure video path */
+ tc358764_write(ctx, VP_CTRL, VP_CTRL_VSDELAY(15) | VP_CTRL_RGB888(1) |
+ VP_CTRL_EVTMODE(1) | VP_CTRL_HSPOL | VP_CTRL_VSPOL);
+
+ /* reset PHY */
+ tc358764_write(ctx, LV_PHY0, LV_PHY0_RST(1) |
+ LV_PHY0_PRBS_ON(4) | LV_PHY0_IS(2) | LV_PHY0_ND(6));
+ tc358764_write(ctx, LV_PHY0, LV_PHY0_PRBS_ON(4) | LV_PHY0_IS(2) |
+ LV_PHY0_ND(6));
+
+ /* reset bridge */
+ tc358764_write(ctx, SYS_RST, SYS_RST_LCD);
+
+ /* set bit order */
+ tc358764_write(ctx, LV_MX0003, LV_MX(LVI_R0, LVI_R1, LVI_R2, LVI_R3));
+ tc358764_write(ctx, LV_MX0407, LV_MX(LVI_R4, LVI_R7, LVI_R5, LVI_G0));
+ tc358764_write(ctx, LV_MX0811, LV_MX(LVI_G1, LVI_G2, LVI_G6, LVI_G7));
+ tc358764_write(ctx, LV_MX1215, LV_MX(LVI_G3, LVI_G4, LVI_G5, LVI_B0));
+ tc358764_write(ctx, LV_MX1619, LV_MX(LVI_B6, LVI_B7, LVI_B1, LVI_B2));
+ tc358764_write(ctx, LV_MX2023, LV_MX(LVI_B3, LVI_B4, LVI_B5, LVI_L0));
+ tc358764_write(ctx, LV_MX2427, LV_MX(LVI_HS, LVI_VS, LVI_DE, LVI_R6));
+ tc358764_write(ctx, LV_CFG, LV_CFG_CLKPOL2 | LV_CFG_CLKPOL1 |
+ LV_CFG_LVEN);
+
+ return tc358764_clear_error(ctx);
+}
+
+static void tc358764_reset(struct tc358764 *ctx)
+{
+ gpiod_set_value(ctx->gpio_reset, 1);
+ usleep_range(1000, 2000);
+ gpiod_set_value(ctx->gpio_reset, 0);
+ usleep_range(1000, 2000);
+}
+
+static void tc358764_post_disable(struct drm_bridge *bridge)
+{
+ struct tc358764 *ctx = bridge_to_tc358764(bridge);
+ int ret;
+
+ tc358764_reset(ctx);
+ usleep_range(10000, 15000);
+ ret = regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+ if (ret < 0)
+ dev_err(ctx->dev, "error disabling regulators (%d)\n", ret);
+}
+
+static void tc358764_pre_enable(struct drm_bridge *bridge)
+{
+ struct tc358764 *ctx = bridge_to_tc358764(bridge);
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+ if (ret < 0)
+ dev_err(ctx->dev, "error enabling regulators (%d)\n", ret);
+ usleep_range(10000, 15000);
+ tc358764_reset(ctx);
+ ret = tc358764_init(ctx);
+ if (ret < 0)
+ dev_err(ctx->dev, "error initializing bridge (%d)\n", ret);
+}
+
+static int tc358764_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct tc358764 *ctx = bridge_to_tc358764(bridge);
+
+ return drm_bridge_attach(bridge->encoder, ctx->next_bridge, bridge, flags);
+}
+
+static const struct drm_bridge_funcs tc358764_bridge_funcs = {
+ .post_disable = tc358764_post_disable,
+ .pre_enable = tc358764_pre_enable,
+ .attach = tc358764_attach,
+};
+
+static int tc358764_parse_dt(struct tc358764 *ctx)
+{
+ struct device *dev = ctx->dev;
+
+ ctx->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(ctx->gpio_reset)) {
+ dev_err(dev, "no reset GPIO pin provided\n");
+ return PTR_ERR(ctx->gpio_reset);
+ }
+
+ ctx->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);
+ if (IS_ERR(ctx->next_bridge))
+ return PTR_ERR(ctx->next_bridge);
+
+ return 0;
+}
+
+static int tc358764_configure_regulators(struct tc358764 *ctx)
+{
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(ctx->supplies); ++i)
+ ctx->supplies[i].supply = tc358764_supplies[i];
+
+ ret = devm_regulator_bulk_get(ctx->dev, ARRAY_SIZE(ctx->supplies),
+ ctx->supplies);
+ if (ret < 0)
+ dev_err(ctx->dev, "failed to get regulators: %d\n", ret);
+
+ return ret;
+}
+
+static int tc358764_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct tc358764 *ctx;
+ int ret;
+
+ ctx = devm_kzalloc(dev, sizeof(struct tc358764), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ mipi_dsi_set_drvdata(dsi, ctx);
+
+ ctx->dev = dev;
+
+ dsi->lanes = 4;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST
+ | MIPI_DSI_MODE_VIDEO_AUTO_VERT | MIPI_DSI_MODE_LPM;
+
+ ret = tc358764_parse_dt(ctx);
+ if (ret < 0)
+ return ret;
+
+ ret = tc358764_configure_regulators(ctx);
+ if (ret < 0)
+ return ret;
+
+ ctx->bridge.funcs = &tc358764_bridge_funcs;
+ ctx->bridge.of_node = dev->of_node;
+
+ drm_bridge_add(&ctx->bridge);
+
+ ret = mipi_dsi_attach(dsi);
+ if (ret < 0) {
+ drm_bridge_remove(&ctx->bridge);
+ dev_err(dev, "failed to attach dsi\n");
+ }
+
+ return ret;
+}
+
+static void tc358764_remove(struct mipi_dsi_device *dsi)
+{
+ struct tc358764 *ctx = mipi_dsi_get_drvdata(dsi);
+
+ mipi_dsi_detach(dsi);
+ drm_bridge_remove(&ctx->bridge);
+}
+
+static const struct of_device_id tc358764_of_match[] = {
+ { .compatible = "toshiba,tc358764" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, tc358764_of_match);
+
+static struct mipi_dsi_driver tc358764_driver = {
+ .probe = tc358764_probe,
+ .remove = tc358764_remove,
+ .driver = {
+ .name = "tc358764",
+ .owner = THIS_MODULE,
+ .of_match_table = tc358764_of_match,
+ },
+};
+module_mipi_dsi_driver(tc358764_driver);
+
+MODULE_AUTHOR("Andrzej Hajda <a.hajda@samsung.com>");
+MODULE_AUTHOR("Maciej Purski <m.purski@samsung.com>");
+MODULE_DESCRIPTION("MIPI-DSI based Driver for TC358764 DSI/LVDS Bridge");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
new file mode 100644
index 000000000..926ab5c3c
--- /dev/null
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -0,0 +1,2219 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * TC358767/TC358867/TC9595 DSI/DPI-to-DPI/(e)DP bridge driver
+ *
+ * The TC358767/TC358867/TC9595 can operate in multiple modes.
+ * All modes are supported -- DPI->(e)DP / DSI->DPI / DSI->(e)DP .
+ *
+ * Copyright (C) 2016 CogentEmbedded Inc
+ * Author: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
+ *
+ * Copyright (C) 2016 Pengutronix, Philipp Zabel <p.zabel@pengutronix.de>
+ *
+ * Copyright (C) 2016 Zodiac Inflight Innovations
+ *
+ * Initially based on: drivers/gpu/drm/i2c/tda998x_drv.c
+ *
+ * Copyright (C) 2012 Texas Instruments
+ * Author: Rob Clark <robdclark@gmail.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+/* Registers */
+
+/* PPI layer registers */
+#define PPI_STARTPPI 0x0104 /* START control bit */
+#define PPI_LPTXTIMECNT 0x0114 /* LPTX timing signal */
+#define LPX_PERIOD 3
+#define PPI_LANEENABLE 0x0134
+#define PPI_TX_RX_TA 0x013c
+#define TTA_GET 0x40000
+#define TTA_SURE 6
+#define PPI_D0S_ATMR 0x0144
+#define PPI_D1S_ATMR 0x0148
+#define PPI_D0S_CLRSIPOCOUNT 0x0164 /* Assertion timer for Lane 0 */
+#define PPI_D1S_CLRSIPOCOUNT 0x0168 /* Assertion timer for Lane 1 */
+#define PPI_D2S_CLRSIPOCOUNT 0x016c /* Assertion timer for Lane 2 */
+#define PPI_D3S_CLRSIPOCOUNT 0x0170 /* Assertion timer for Lane 3 */
+#define PPI_START_FUNCTION BIT(0)
+
+/* DSI layer registers */
+#define DSI_STARTDSI 0x0204 /* START control bit of DSI-TX */
+#define DSI_LANEENABLE 0x0210 /* Enables each lane */
+#define DSI_RX_START BIT(0)
+
+/* Lane enable PPI and DSI register bits */
+#define LANEENABLE_CLEN BIT(0)
+#define LANEENABLE_L0EN BIT(1)
+#define LANEENABLE_L1EN BIT(2)
+#define LANEENABLE_L2EN BIT(1)
+#define LANEENABLE_L3EN BIT(2)
+
+/* Display Parallel Input Interface */
+#define DPIPXLFMT 0x0440
+#define VS_POL_ACTIVE_LOW (1 << 10)
+#define HS_POL_ACTIVE_LOW (1 << 9)
+#define DE_POL_ACTIVE_HIGH (0 << 8)
+#define SUB_CFG_TYPE_CONFIG1 (0 << 2) /* LSB aligned */
+#define SUB_CFG_TYPE_CONFIG2 (1 << 2) /* Loosely Packed */
+#define SUB_CFG_TYPE_CONFIG3 (2 << 2) /* LSB aligned 8-bit */
+#define DPI_BPP_RGB888 (0 << 0)
+#define DPI_BPP_RGB666 (1 << 0)
+#define DPI_BPP_RGB565 (2 << 0)
+
+/* Display Parallel Output Interface */
+#define POCTRL 0x0448
+#define POCTRL_S2P BIT(7)
+#define POCTRL_PCLK_POL BIT(3)
+#define POCTRL_VS_POL BIT(2)
+#define POCTRL_HS_POL BIT(1)
+#define POCTRL_DE_POL BIT(0)
+
+/* Video Path */
+#define VPCTRL0 0x0450
+#define VSDELAY GENMASK(31, 20)
+#define OPXLFMT_RGB666 (0 << 8)
+#define OPXLFMT_RGB888 (1 << 8)
+#define FRMSYNC_DISABLED (0 << 4) /* Video Timing Gen Disabled */
+#define FRMSYNC_ENABLED (1 << 4) /* Video Timing Gen Enabled */
+#define MSF_DISABLED (0 << 0) /* Magic Square FRC disabled */
+#define MSF_ENABLED (1 << 0) /* Magic Square FRC enabled */
+#define HTIM01 0x0454
+#define HPW GENMASK(8, 0)
+#define HBPR GENMASK(24, 16)
+#define HTIM02 0x0458
+#define HDISPR GENMASK(10, 0)
+#define HFPR GENMASK(24, 16)
+#define VTIM01 0x045c
+#define VSPR GENMASK(7, 0)
+#define VBPR GENMASK(23, 16)
+#define VTIM02 0x0460
+#define VFPR GENMASK(23, 16)
+#define VDISPR GENMASK(10, 0)
+#define VFUEN0 0x0464
+#define VFUEN BIT(0) /* Video Frame Timing Upload */
+
+/* System */
+#define TC_IDREG 0x0500
+#define SYSSTAT 0x0508
+#define SYSCTRL 0x0510
+#define DP0_AUDSRC_NO_INPUT (0 << 3)
+#define DP0_AUDSRC_I2S_RX (1 << 3)
+#define DP0_VIDSRC_NO_INPUT (0 << 0)
+#define DP0_VIDSRC_DSI_RX (1 << 0)
+#define DP0_VIDSRC_DPI_RX (2 << 0)
+#define DP0_VIDSRC_COLOR_BAR (3 << 0)
+#define SYSRSTENB 0x050c
+#define ENBI2C (1 << 0)
+#define ENBLCD0 (1 << 2)
+#define ENBBM (1 << 3)
+#define ENBDSIRX (1 << 4)
+#define ENBREG (1 << 5)
+#define ENBHDCP (1 << 8)
+#define GPIOM 0x0540
+#define GPIOC 0x0544
+#define GPIOO 0x0548
+#define GPIOI 0x054c
+#define INTCTL_G 0x0560
+#define INTSTS_G 0x0564
+
+#define INT_SYSERR BIT(16)
+#define INT_GPIO_H(x) (1 << (x == 0 ? 2 : 10))
+#define INT_GPIO_LC(x) (1 << (x == 0 ? 3 : 11))
+
+#define INT_GP0_LCNT 0x0584
+#define INT_GP1_LCNT 0x0588
+
+/* Control */
+#define DP0CTL 0x0600
+#define VID_MN_GEN BIT(6) /* Auto-generate M/N values */
+#define EF_EN BIT(5) /* Enable Enhanced Framing */
+#define VID_EN BIT(1) /* Video transmission enable */
+#define DP_EN BIT(0) /* Enable DPTX function */
+
+/* Clocks */
+#define DP0_VIDMNGEN0 0x0610
+#define DP0_VIDMNGEN1 0x0614
+#define DP0_VMNGENSTATUS 0x0618
+
+/* Main Channel */
+#define DP0_SECSAMPLE 0x0640
+#define DP0_VIDSYNCDELAY 0x0644
+#define VID_SYNC_DLY GENMASK(15, 0)
+#define THRESH_DLY GENMASK(31, 16)
+
+#define DP0_TOTALVAL 0x0648
+#define H_TOTAL GENMASK(15, 0)
+#define V_TOTAL GENMASK(31, 16)
+#define DP0_STARTVAL 0x064c
+#define H_START GENMASK(15, 0)
+#define V_START GENMASK(31, 16)
+#define DP0_ACTIVEVAL 0x0650
+#define H_ACT GENMASK(15, 0)
+#define V_ACT GENMASK(31, 16)
+
+#define DP0_SYNCVAL 0x0654
+#define VS_WIDTH GENMASK(30, 16)
+#define HS_WIDTH GENMASK(14, 0)
+#define SYNCVAL_HS_POL_ACTIVE_LOW (1 << 15)
+#define SYNCVAL_VS_POL_ACTIVE_LOW (1 << 31)
+#define DP0_MISC 0x0658
+#define TU_SIZE_RECOMMENDED (63) /* LSCLK cycles per TU */
+#define MAX_TU_SYMBOL GENMASK(28, 23)
+#define TU_SIZE GENMASK(21, 16)
+#define BPC_6 (0 << 5)
+#define BPC_8 (1 << 5)
+
+/* AUX channel */
+#define DP0_AUXCFG0 0x0660
+#define DP0_AUXCFG0_BSIZE GENMASK(11, 8)
+#define DP0_AUXCFG0_ADDR_ONLY BIT(4)
+#define DP0_AUXCFG1 0x0664
+#define AUX_RX_FILTER_EN BIT(16)
+
+#define DP0_AUXADDR 0x0668
+#define DP0_AUXWDATA(i) (0x066c + (i) * 4)
+#define DP0_AUXRDATA(i) (0x067c + (i) * 4)
+#define DP0_AUXSTATUS 0x068c
+#define AUX_BYTES GENMASK(15, 8)
+#define AUX_STATUS GENMASK(7, 4)
+#define AUX_TIMEOUT BIT(1)
+#define AUX_BUSY BIT(0)
+#define DP0_AUXI2CADR 0x0698
+
+/* Link Training */
+#define DP0_SRCCTRL 0x06a0
+#define DP0_SRCCTRL_SCRMBLDIS BIT(13)
+#define DP0_SRCCTRL_EN810B BIT(12)
+#define DP0_SRCCTRL_NOTP (0 << 8)
+#define DP0_SRCCTRL_TP1 (1 << 8)
+#define DP0_SRCCTRL_TP2 (2 << 8)
+#define DP0_SRCCTRL_LANESKEW BIT(7)
+#define DP0_SRCCTRL_SSCG BIT(3)
+#define DP0_SRCCTRL_LANES_1 (0 << 2)
+#define DP0_SRCCTRL_LANES_2 (1 << 2)
+#define DP0_SRCCTRL_BW27 (1 << 1)
+#define DP0_SRCCTRL_BW162 (0 << 1)
+#define DP0_SRCCTRL_AUTOCORRECT BIT(0)
+#define DP0_LTSTAT 0x06d0
+#define LT_LOOPDONE BIT(13)
+#define LT_STATUS_MASK (0x1f << 8)
+#define LT_CHANNEL1_EQ_BITS (DP_CHANNEL_EQ_BITS << 4)
+#define LT_INTERLANE_ALIGN_DONE BIT(3)
+#define LT_CHANNEL0_EQ_BITS (DP_CHANNEL_EQ_BITS)
+#define DP0_SNKLTCHGREQ 0x06d4
+#define DP0_LTLOOPCTRL 0x06d8
+#define DP0_SNKLTCTRL 0x06e4
+
+#define DP1_SRCCTRL 0x07a0
+
+/* PHY */
+#define DP_PHY_CTRL 0x0800
+#define DP_PHY_RST BIT(28) /* DP PHY Global Soft Reset */
+#define BGREN BIT(25) /* AUX PHY BGR Enable */
+#define PWR_SW_EN BIT(24) /* PHY Power Switch Enable */
+#define PHY_M1_RST BIT(12) /* Reset PHY1 Main Channel */
+#define PHY_RDY BIT(16) /* PHY Main Channels Ready */
+#define PHY_M0_RST BIT(8) /* Reset PHY0 Main Channel */
+#define PHY_2LANE BIT(2) /* PHY Enable 2 lanes */
+#define PHY_A0_EN BIT(1) /* PHY Aux Channel0 Enable */
+#define PHY_M0_EN BIT(0) /* PHY Main Channel0 Enable */
+
+/* PLL */
+#define DP0_PLLCTRL 0x0900
+#define DP1_PLLCTRL 0x0904 /* not defined in DS */
+#define PXL_PLLCTRL 0x0908
+#define PLLUPDATE BIT(2)
+#define PLLBYP BIT(1)
+#define PLLEN BIT(0)
+#define PXL_PLLPARAM 0x0914
+#define IN_SEL_REFCLK (0 << 14)
+#define SYS_PLLPARAM 0x0918
+#define REF_FREQ_38M4 (0 << 8) /* 38.4 MHz */
+#define REF_FREQ_19M2 (1 << 8) /* 19.2 MHz */
+#define REF_FREQ_26M (2 << 8) /* 26 MHz */
+#define REF_FREQ_13M (3 << 8) /* 13 MHz */
+#define SYSCLK_SEL_LSCLK (0 << 4)
+#define LSCLK_DIV_1 (0 << 0)
+#define LSCLK_DIV_2 (1 << 0)
+
+/* Test & Debug */
+#define TSTCTL 0x0a00
+#define COLOR_R GENMASK(31, 24)
+#define COLOR_G GENMASK(23, 16)
+#define COLOR_B GENMASK(15, 8)
+#define ENI2CFILTER BIT(4)
+#define COLOR_BAR_MODE GENMASK(1, 0)
+#define COLOR_BAR_MODE_BARS 2
+#define PLL_DBG 0x0a04
+
+static bool tc_test_pattern;
+module_param_named(test, tc_test_pattern, bool, 0644);
+
+struct tc_edp_link {
+ u8 dpcd[DP_RECEIVER_CAP_SIZE];
+ unsigned int rate;
+ u8 num_lanes;
+ u8 assr;
+ bool scrambler_dis;
+ bool spread;
+};
+
+struct tc_data {
+ struct device *dev;
+ struct regmap *regmap;
+ struct drm_dp_aux aux;
+
+ struct drm_bridge bridge;
+ struct drm_bridge *panel_bridge;
+ struct drm_connector connector;
+
+ struct mipi_dsi_device *dsi;
+
+ /* link settings */
+ struct tc_edp_link link;
+
+ /* current mode */
+ struct drm_display_mode mode;
+
+ u32 rev;
+ u8 assr;
+
+ struct gpio_desc *sd_gpio;
+ struct gpio_desc *reset_gpio;
+ struct clk *refclk;
+
+ /* do we have IRQ */
+ bool have_irq;
+
+ /* Input connector type, DSI and not DPI. */
+ bool input_connector_dsi;
+
+ /* HPD pin number (0 or 1) or -ENODEV */
+ int hpd_pin;
+};
+
+static inline struct tc_data *aux_to_tc(struct drm_dp_aux *a)
+{
+ return container_of(a, struct tc_data, aux);
+}
+
+static inline struct tc_data *bridge_to_tc(struct drm_bridge *b)
+{
+ return container_of(b, struct tc_data, bridge);
+}
+
+static inline struct tc_data *connector_to_tc(struct drm_connector *c)
+{
+ return container_of(c, struct tc_data, connector);
+}
+
+static inline int tc_poll_timeout(struct tc_data *tc, unsigned int addr,
+ unsigned int cond_mask,
+ unsigned int cond_value,
+ unsigned long sleep_us, u64 timeout_us)
+{
+ unsigned int val;
+
+ return regmap_read_poll_timeout(tc->regmap, addr, val,
+ (val & cond_mask) == cond_value,
+ sleep_us, timeout_us);
+}
+
+static int tc_aux_wait_busy(struct tc_data *tc)
+{
+ return tc_poll_timeout(tc, DP0_AUXSTATUS, AUX_BUSY, 0, 100, 100000);
+}
+
+static int tc_aux_write_data(struct tc_data *tc, const void *data,
+ size_t size)
+{
+ u32 auxwdata[DP_AUX_MAX_PAYLOAD_BYTES / sizeof(u32)] = { 0 };
+ int ret, count = ALIGN(size, sizeof(u32));
+
+ memcpy(auxwdata, data, size);
+
+ ret = regmap_raw_write(tc->regmap, DP0_AUXWDATA(0), auxwdata, count);
+ if (ret)
+ return ret;
+
+ return size;
+}
+
+static int tc_aux_read_data(struct tc_data *tc, void *data, size_t size)
+{
+ u32 auxrdata[DP_AUX_MAX_PAYLOAD_BYTES / sizeof(u32)];
+ int ret, count = ALIGN(size, sizeof(u32));
+
+ ret = regmap_raw_read(tc->regmap, DP0_AUXRDATA(0), auxrdata, count);
+ if (ret)
+ return ret;
+
+ memcpy(data, auxrdata, size);
+
+ return size;
+}
+
+static u32 tc_auxcfg0(struct drm_dp_aux_msg *msg, size_t size)
+{
+ u32 auxcfg0 = msg->request;
+
+ if (size)
+ auxcfg0 |= FIELD_PREP(DP0_AUXCFG0_BSIZE, size - 1);
+ else
+ auxcfg0 |= DP0_AUXCFG0_ADDR_ONLY;
+
+ return auxcfg0;
+}
+
+static ssize_t tc_aux_transfer(struct drm_dp_aux *aux,
+ struct drm_dp_aux_msg *msg)
+{
+ struct tc_data *tc = aux_to_tc(aux);
+ size_t size = min_t(size_t, DP_AUX_MAX_PAYLOAD_BYTES - 1, msg->size);
+ u8 request = msg->request & ~DP_AUX_I2C_MOT;
+ u32 auxstatus;
+ int ret;
+
+ ret = tc_aux_wait_busy(tc);
+ if (ret)
+ return ret;
+
+ switch (request) {
+ case DP_AUX_NATIVE_READ:
+ case DP_AUX_I2C_READ:
+ break;
+ case DP_AUX_NATIVE_WRITE:
+ case DP_AUX_I2C_WRITE:
+ if (size) {
+ ret = tc_aux_write_data(tc, msg->buffer, size);
+ if (ret < 0)
+ return ret;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Store address */
+ ret = regmap_write(tc->regmap, DP0_AUXADDR, msg->address);
+ if (ret)
+ return ret;
+ /* Start transfer */
+ ret = regmap_write(tc->regmap, DP0_AUXCFG0, tc_auxcfg0(msg, size));
+ if (ret)
+ return ret;
+
+ ret = tc_aux_wait_busy(tc);
+ if (ret)
+ return ret;
+
+ ret = regmap_read(tc->regmap, DP0_AUXSTATUS, &auxstatus);
+ if (ret)
+ return ret;
+
+ if (auxstatus & AUX_TIMEOUT)
+ return -ETIMEDOUT;
+ /*
+ * For some reason address-only DP_AUX_I2C_WRITE (MOT), still
+ * reports 1 byte transferred in its status. To deal we that
+ * we ignore aux_bytes field if we know that this was an
+ * address-only transfer
+ */
+ if (size)
+ size = FIELD_GET(AUX_BYTES, auxstatus);
+ msg->reply = FIELD_GET(AUX_STATUS, auxstatus);
+
+ switch (request) {
+ case DP_AUX_NATIVE_READ:
+ case DP_AUX_I2C_READ:
+ if (size)
+ return tc_aux_read_data(tc, msg->buffer, size);
+ break;
+ }
+
+ return size;
+}
+
+static const char * const training_pattern1_errors[] = {
+ "No errors",
+ "Aux write error",
+ "Aux read error",
+ "Max voltage reached error",
+ "Loop counter expired error",
+ "res", "res", "res"
+};
+
+static const char * const training_pattern2_errors[] = {
+ "No errors",
+ "Aux write error",
+ "Aux read error",
+ "Clock recovery failed error",
+ "Loop counter expired error",
+ "res", "res", "res"
+};
+
+static u32 tc_srcctrl(struct tc_data *tc)
+{
+ /*
+ * No training pattern, skew lane 1 data by two LSCLK cycles with
+ * respect to lane 0 data, AutoCorrect Mode = 0
+ */
+ u32 reg = DP0_SRCCTRL_NOTP | DP0_SRCCTRL_LANESKEW | DP0_SRCCTRL_EN810B;
+
+ if (tc->link.scrambler_dis)
+ reg |= DP0_SRCCTRL_SCRMBLDIS; /* Scrambler Disabled */
+ if (tc->link.spread)
+ reg |= DP0_SRCCTRL_SSCG; /* Spread Spectrum Enable */
+ if (tc->link.num_lanes == 2)
+ reg |= DP0_SRCCTRL_LANES_2; /* Two Main Channel Lanes */
+ if (tc->link.rate != 162000)
+ reg |= DP0_SRCCTRL_BW27; /* 2.7 Gbps link */
+ return reg;
+}
+
+static int tc_pllupdate(struct tc_data *tc, unsigned int pllctrl)
+{
+ int ret;
+
+ ret = regmap_write(tc->regmap, pllctrl, PLLUPDATE | PLLEN);
+ if (ret)
+ return ret;
+
+ /* Wait for PLL to lock: up to 2.09 ms, depending on refclk */
+ usleep_range(3000, 6000);
+
+ return 0;
+}
+
+static int tc_pxl_pll_en(struct tc_data *tc, u32 refclk, u32 pixelclock)
+{
+ int ret;
+ int i_pre, best_pre = 1;
+ int i_post, best_post = 1;
+ int div, best_div = 1;
+ int mul, best_mul = 1;
+ int delta, best_delta;
+ int ext_div[] = {1, 2, 3, 5, 7};
+ int clk_min, clk_max;
+ int best_pixelclock = 0;
+ int vco_hi = 0;
+ u32 pxl_pllparam;
+
+ /*
+ * refclk * mul / (ext_pre_div * pre_div) should be in range:
+ * - DPI ..... 0 to 100 MHz
+ * - (e)DP ... 150 to 650 MHz
+ */
+ if (tc->bridge.type == DRM_MODE_CONNECTOR_DPI) {
+ clk_min = 0;
+ clk_max = 100000000;
+ } else {
+ clk_min = 150000000;
+ clk_max = 650000000;
+ }
+
+ dev_dbg(tc->dev, "PLL: requested %d pixelclock, ref %d\n", pixelclock,
+ refclk);
+ best_delta = pixelclock;
+ /* Loop over all possible ext_divs, skipping invalid configurations */
+ for (i_pre = 0; i_pre < ARRAY_SIZE(ext_div); i_pre++) {
+ /*
+ * refclk / ext_pre_div should be in the 1 to 200 MHz range.
+ * We don't allow any refclk > 200 MHz, only check lower bounds.
+ */
+ if (refclk / ext_div[i_pre] < 1000000)
+ continue;
+ for (i_post = 0; i_post < ARRAY_SIZE(ext_div); i_post++) {
+ for (div = 1; div <= 16; div++) {
+ u32 clk;
+ u64 tmp;
+
+ tmp = pixelclock * ext_div[i_pre] *
+ ext_div[i_post] * div;
+ do_div(tmp, refclk);
+ mul = tmp;
+
+ /* Check limits */
+ if ((mul < 1) || (mul > 128))
+ continue;
+
+ clk = (refclk / ext_div[i_pre] / div) * mul;
+ if ((clk > clk_max) || (clk < clk_min))
+ continue;
+
+ clk = clk / ext_div[i_post];
+ delta = clk - pixelclock;
+
+ if (abs(delta) < abs(best_delta)) {
+ best_pre = i_pre;
+ best_post = i_post;
+ best_div = div;
+ best_mul = mul;
+ best_delta = delta;
+ best_pixelclock = clk;
+ }
+ }
+ }
+ }
+ if (best_pixelclock == 0) {
+ dev_err(tc->dev, "Failed to calc clock for %d pixelclock\n",
+ pixelclock);
+ return -EINVAL;
+ }
+
+ dev_dbg(tc->dev, "PLL: got %d, delta %d\n", best_pixelclock,
+ best_delta);
+ dev_dbg(tc->dev, "PLL: %d / %d / %d * %d / %d\n", refclk,
+ ext_div[best_pre], best_div, best_mul, ext_div[best_post]);
+
+ /* if VCO >= 300 MHz */
+ if (refclk / ext_div[best_pre] / best_div * best_mul >= 300000000)
+ vco_hi = 1;
+ /* see DS */
+ if (best_div == 16)
+ best_div = 0;
+ if (best_mul == 128)
+ best_mul = 0;
+
+ /* Power up PLL and switch to bypass */
+ ret = regmap_write(tc->regmap, PXL_PLLCTRL, PLLBYP | PLLEN);
+ if (ret)
+ return ret;
+
+ pxl_pllparam = vco_hi << 24; /* For PLL VCO >= 300 MHz = 1 */
+ pxl_pllparam |= ext_div[best_pre] << 20; /* External Pre-divider */
+ pxl_pllparam |= ext_div[best_post] << 16; /* External Post-divider */
+ pxl_pllparam |= IN_SEL_REFCLK; /* Use RefClk as PLL input */
+ pxl_pllparam |= best_div << 8; /* Divider for PLL RefClk */
+ pxl_pllparam |= best_mul; /* Multiplier for PLL */
+
+ ret = regmap_write(tc->regmap, PXL_PLLPARAM, pxl_pllparam);
+ if (ret)
+ return ret;
+
+ /* Force PLL parameter update and disable bypass */
+ return tc_pllupdate(tc, PXL_PLLCTRL);
+}
+
+static int tc_pxl_pll_dis(struct tc_data *tc)
+{
+ /* Enable PLL bypass, power down PLL */
+ return regmap_write(tc->regmap, PXL_PLLCTRL, PLLBYP);
+}
+
+static int tc_stream_clock_calc(struct tc_data *tc)
+{
+ /*
+ * If the Stream clock and Link Symbol clock are
+ * asynchronous with each other, the value of M changes over
+ * time. This way of generating link clock and stream
+ * clock is called Asynchronous Clock mode. The value M
+ * must change while the value N stays constant. The
+ * value of N in this Asynchronous Clock mode must be set
+ * to 2^15 or 32,768.
+ *
+ * LSCLK = 1/10 of high speed link clock
+ *
+ * f_STRMCLK = M/N * f_LSCLK
+ * M/N = f_STRMCLK / f_LSCLK
+ *
+ */
+ return regmap_write(tc->regmap, DP0_VIDMNGEN1, 32768);
+}
+
+static int tc_set_syspllparam(struct tc_data *tc)
+{
+ unsigned long rate;
+ u32 pllparam = SYSCLK_SEL_LSCLK | LSCLK_DIV_2;
+
+ rate = clk_get_rate(tc->refclk);
+ switch (rate) {
+ case 38400000:
+ pllparam |= REF_FREQ_38M4;
+ break;
+ case 26000000:
+ pllparam |= REF_FREQ_26M;
+ break;
+ case 19200000:
+ pllparam |= REF_FREQ_19M2;
+ break;
+ case 13000000:
+ pllparam |= REF_FREQ_13M;
+ break;
+ default:
+ dev_err(tc->dev, "Invalid refclk rate: %lu Hz\n", rate);
+ return -EINVAL;
+ }
+
+ return regmap_write(tc->regmap, SYS_PLLPARAM, pllparam);
+}
+
+static int tc_aux_link_setup(struct tc_data *tc)
+{
+ int ret;
+ u32 dp0_auxcfg1;
+
+ /* Setup DP-PHY / PLL */
+ ret = tc_set_syspllparam(tc);
+ if (ret)
+ goto err;
+
+ ret = regmap_write(tc->regmap, DP_PHY_CTRL,
+ BGREN | PWR_SW_EN | PHY_A0_EN);
+ if (ret)
+ goto err;
+ /*
+ * Initially PLLs are in bypass. Force PLL parameter update,
+ * disable PLL bypass, enable PLL
+ */
+ ret = tc_pllupdate(tc, DP0_PLLCTRL);
+ if (ret)
+ goto err;
+
+ ret = tc_pllupdate(tc, DP1_PLLCTRL);
+ if (ret)
+ goto err;
+
+ ret = tc_poll_timeout(tc, DP_PHY_CTRL, PHY_RDY, PHY_RDY, 100, 100000);
+ if (ret == -ETIMEDOUT) {
+ dev_err(tc->dev, "Timeout waiting for PHY to become ready");
+ return ret;
+ } else if (ret) {
+ goto err;
+ }
+
+ /* Setup AUX link */
+ dp0_auxcfg1 = AUX_RX_FILTER_EN;
+ dp0_auxcfg1 |= 0x06 << 8; /* Aux Bit Period Calculator Threshold */
+ dp0_auxcfg1 |= 0x3f << 0; /* Aux Response Timeout Timer */
+
+ ret = regmap_write(tc->regmap, DP0_AUXCFG1, dp0_auxcfg1);
+ if (ret)
+ goto err;
+
+ /* Register DP AUX channel */
+ tc->aux.name = "TC358767 AUX i2c adapter";
+ tc->aux.dev = tc->dev;
+ tc->aux.transfer = tc_aux_transfer;
+ drm_dp_aux_init(&tc->aux);
+
+ return 0;
+err:
+ dev_err(tc->dev, "tc_aux_link_setup failed: %d\n", ret);
+ return ret;
+}
+
+static int tc_get_display_props(struct tc_data *tc)
+{
+ u8 revision, num_lanes;
+ unsigned int rate;
+ int ret;
+ u8 reg;
+
+ /* Read DP Rx Link Capability */
+ ret = drm_dp_dpcd_read(&tc->aux, DP_DPCD_REV, tc->link.dpcd,
+ DP_RECEIVER_CAP_SIZE);
+ if (ret < 0)
+ goto err_dpcd_read;
+
+ revision = tc->link.dpcd[DP_DPCD_REV];
+ rate = drm_dp_max_link_rate(tc->link.dpcd);
+ num_lanes = drm_dp_max_lane_count(tc->link.dpcd);
+
+ if (rate != 162000 && rate != 270000) {
+ dev_dbg(tc->dev, "Falling to 2.7 Gbps rate\n");
+ rate = 270000;
+ }
+
+ tc->link.rate = rate;
+
+ if (num_lanes > 2) {
+ dev_dbg(tc->dev, "Falling to 2 lanes\n");
+ num_lanes = 2;
+ }
+
+ tc->link.num_lanes = num_lanes;
+
+ ret = drm_dp_dpcd_readb(&tc->aux, DP_MAX_DOWNSPREAD, &reg);
+ if (ret < 0)
+ goto err_dpcd_read;
+ tc->link.spread = reg & DP_MAX_DOWNSPREAD_0_5;
+
+ ret = drm_dp_dpcd_readb(&tc->aux, DP_MAIN_LINK_CHANNEL_CODING, &reg);
+ if (ret < 0)
+ goto err_dpcd_read;
+
+ tc->link.scrambler_dis = false;
+ /* read assr */
+ ret = drm_dp_dpcd_readb(&tc->aux, DP_EDP_CONFIGURATION_SET, &reg);
+ if (ret < 0)
+ goto err_dpcd_read;
+ tc->link.assr = reg & DP_ALTERNATE_SCRAMBLER_RESET_ENABLE;
+
+ dev_dbg(tc->dev, "DPCD rev: %d.%d, rate: %s, lanes: %d, framing: %s\n",
+ revision >> 4, revision & 0x0f,
+ (tc->link.rate == 162000) ? "1.62Gbps" : "2.7Gbps",
+ tc->link.num_lanes,
+ drm_dp_enhanced_frame_cap(tc->link.dpcd) ?
+ "enhanced" : "default");
+ dev_dbg(tc->dev, "Downspread: %s, scrambler: %s\n",
+ tc->link.spread ? "0.5%" : "0.0%",
+ tc->link.scrambler_dis ? "disabled" : "enabled");
+ dev_dbg(tc->dev, "Display ASSR: %d, TC358767 ASSR: %d\n",
+ tc->link.assr, tc->assr);
+
+ return 0;
+
+err_dpcd_read:
+ dev_err(tc->dev, "failed to read DPCD: %d\n", ret);
+ return ret;
+}
+
+static int tc_set_common_video_mode(struct tc_data *tc,
+ const struct drm_display_mode *mode)
+{
+ int left_margin = mode->htotal - mode->hsync_end;
+ int right_margin = mode->hsync_start - mode->hdisplay;
+ int hsync_len = mode->hsync_end - mode->hsync_start;
+ int upper_margin = mode->vtotal - mode->vsync_end;
+ int lower_margin = mode->vsync_start - mode->vdisplay;
+ int vsync_len = mode->vsync_end - mode->vsync_start;
+ int ret;
+
+ dev_dbg(tc->dev, "set mode %dx%d\n",
+ mode->hdisplay, mode->vdisplay);
+ dev_dbg(tc->dev, "H margin %d,%d sync %d\n",
+ left_margin, right_margin, hsync_len);
+ dev_dbg(tc->dev, "V margin %d,%d sync %d\n",
+ upper_margin, lower_margin, vsync_len);
+ dev_dbg(tc->dev, "total: %dx%d\n", mode->htotal, mode->vtotal);
+
+
+ /*
+ * LCD Ctl Frame Size
+ * datasheet is not clear of vsdelay in case of DPI
+ * assume we do not need any delay when DPI is a source of
+ * sync signals
+ */
+ ret = regmap_write(tc->regmap, VPCTRL0,
+ FIELD_PREP(VSDELAY, 0) |
+ OPXLFMT_RGB888 | FRMSYNC_DISABLED | MSF_DISABLED);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(tc->regmap, HTIM01,
+ FIELD_PREP(HBPR, ALIGN(left_margin, 2)) |
+ FIELD_PREP(HPW, ALIGN(hsync_len, 2)));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(tc->regmap, HTIM02,
+ FIELD_PREP(HDISPR, ALIGN(mode->hdisplay, 2)) |
+ FIELD_PREP(HFPR, ALIGN(right_margin, 2)));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(tc->regmap, VTIM01,
+ FIELD_PREP(VBPR, upper_margin) |
+ FIELD_PREP(VSPR, vsync_len));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(tc->regmap, VTIM02,
+ FIELD_PREP(VFPR, lower_margin) |
+ FIELD_PREP(VDISPR, mode->vdisplay));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(tc->regmap, VFUEN0, VFUEN); /* update settings */
+ if (ret)
+ return ret;
+
+ /* Test pattern settings */
+ ret = regmap_write(tc->regmap, TSTCTL,
+ FIELD_PREP(COLOR_R, 120) |
+ FIELD_PREP(COLOR_G, 20) |
+ FIELD_PREP(COLOR_B, 99) |
+ ENI2CFILTER |
+ FIELD_PREP(COLOR_BAR_MODE, COLOR_BAR_MODE_BARS));
+
+ return ret;
+}
+
+static int tc_set_dpi_video_mode(struct tc_data *tc,
+ const struct drm_display_mode *mode)
+{
+ u32 value = POCTRL_S2P;
+
+ if (tc->mode.flags & DRM_MODE_FLAG_NHSYNC)
+ value |= POCTRL_HS_POL;
+
+ if (tc->mode.flags & DRM_MODE_FLAG_NVSYNC)
+ value |= POCTRL_VS_POL;
+
+ return regmap_write(tc->regmap, POCTRL, value);
+}
+
+static int tc_set_edp_video_mode(struct tc_data *tc,
+ const struct drm_display_mode *mode)
+{
+ int ret;
+ int vid_sync_dly;
+ int max_tu_symbol;
+
+ int left_margin = mode->htotal - mode->hsync_end;
+ int hsync_len = mode->hsync_end - mode->hsync_start;
+ int upper_margin = mode->vtotal - mode->vsync_end;
+ int vsync_len = mode->vsync_end - mode->vsync_start;
+ u32 dp0_syncval;
+ u32 bits_per_pixel = 24;
+ u32 in_bw, out_bw;
+ u32 dpipxlfmt;
+
+ /*
+ * Recommended maximum number of symbols transferred in a transfer unit:
+ * DIV_ROUND_UP((input active video bandwidth in bytes) * tu_size,
+ * (output active video bandwidth in bytes))
+ * Must be less than tu_size.
+ */
+
+ in_bw = mode->clock * bits_per_pixel / 8;
+ out_bw = tc->link.num_lanes * tc->link.rate;
+ max_tu_symbol = DIV_ROUND_UP(in_bw * TU_SIZE_RECOMMENDED, out_bw);
+
+ /* DP Main Stream Attributes */
+ vid_sync_dly = hsync_len + left_margin + mode->hdisplay;
+ ret = regmap_write(tc->regmap, DP0_VIDSYNCDELAY,
+ FIELD_PREP(THRESH_DLY, max_tu_symbol) |
+ FIELD_PREP(VID_SYNC_DLY, vid_sync_dly));
+
+ ret = regmap_write(tc->regmap, DP0_TOTALVAL,
+ FIELD_PREP(H_TOTAL, mode->htotal) |
+ FIELD_PREP(V_TOTAL, mode->vtotal));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(tc->regmap, DP0_STARTVAL,
+ FIELD_PREP(H_START, left_margin + hsync_len) |
+ FIELD_PREP(V_START, upper_margin + vsync_len));
+ if (ret)
+ return ret;
+
+ ret = regmap_write(tc->regmap, DP0_ACTIVEVAL,
+ FIELD_PREP(V_ACT, mode->vdisplay) |
+ FIELD_PREP(H_ACT, mode->hdisplay));
+ if (ret)
+ return ret;
+
+ dp0_syncval = FIELD_PREP(VS_WIDTH, vsync_len) |
+ FIELD_PREP(HS_WIDTH, hsync_len);
+
+ if (mode->flags & DRM_MODE_FLAG_NVSYNC)
+ dp0_syncval |= SYNCVAL_VS_POL_ACTIVE_LOW;
+
+ if (mode->flags & DRM_MODE_FLAG_NHSYNC)
+ dp0_syncval |= SYNCVAL_HS_POL_ACTIVE_LOW;
+
+ ret = regmap_write(tc->regmap, DP0_SYNCVAL, dp0_syncval);
+ if (ret)
+ return ret;
+
+ dpipxlfmt = DE_POL_ACTIVE_HIGH | SUB_CFG_TYPE_CONFIG1 | DPI_BPP_RGB888;
+
+ if (mode->flags & DRM_MODE_FLAG_NVSYNC)
+ dpipxlfmt |= VS_POL_ACTIVE_LOW;
+
+ if (mode->flags & DRM_MODE_FLAG_NHSYNC)
+ dpipxlfmt |= HS_POL_ACTIVE_LOW;
+
+ ret = regmap_write(tc->regmap, DPIPXLFMT, dpipxlfmt);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(tc->regmap, DP0_MISC,
+ FIELD_PREP(MAX_TU_SYMBOL, max_tu_symbol) |
+ FIELD_PREP(TU_SIZE, TU_SIZE_RECOMMENDED) |
+ BPC_8);
+ return ret;
+}
+
+static int tc_wait_link_training(struct tc_data *tc)
+{
+ u32 value;
+ int ret;
+
+ ret = tc_poll_timeout(tc, DP0_LTSTAT, LT_LOOPDONE,
+ LT_LOOPDONE, 500, 100000);
+ if (ret) {
+ dev_err(tc->dev, "Link training timeout waiting for LT_LOOPDONE!\n");
+ return ret;
+ }
+
+ ret = regmap_read(tc->regmap, DP0_LTSTAT, &value);
+ if (ret)
+ return ret;
+
+ return (value >> 8) & 0x7;
+}
+
+static int tc_main_link_enable(struct tc_data *tc)
+{
+ struct drm_dp_aux *aux = &tc->aux;
+ struct device *dev = tc->dev;
+ u32 dp_phy_ctrl;
+ u32 value;
+ int ret;
+ u8 tmp[DP_LINK_STATUS_SIZE];
+
+ dev_dbg(tc->dev, "link enable\n");
+
+ ret = regmap_read(tc->regmap, DP0CTL, &value);
+ if (ret)
+ return ret;
+
+ if (WARN_ON(value & DP_EN)) {
+ ret = regmap_write(tc->regmap, DP0CTL, 0);
+ if (ret)
+ return ret;
+ }
+
+ ret = regmap_write(tc->regmap, DP0_SRCCTRL, tc_srcctrl(tc));
+ if (ret)
+ return ret;
+ /* SSCG and BW27 on DP1 must be set to the same as on DP0 */
+ ret = regmap_write(tc->regmap, DP1_SRCCTRL,
+ (tc->link.spread ? DP0_SRCCTRL_SSCG : 0) |
+ ((tc->link.rate != 162000) ? DP0_SRCCTRL_BW27 : 0));
+ if (ret)
+ return ret;
+
+ ret = tc_set_syspllparam(tc);
+ if (ret)
+ return ret;
+
+ /* Setup Main Link */
+ dp_phy_ctrl = BGREN | PWR_SW_EN | PHY_A0_EN | PHY_M0_EN;
+ if (tc->link.num_lanes == 2)
+ dp_phy_ctrl |= PHY_2LANE;
+
+ ret = regmap_write(tc->regmap, DP_PHY_CTRL, dp_phy_ctrl);
+ if (ret)
+ return ret;
+
+ /* PLL setup */
+ ret = tc_pllupdate(tc, DP0_PLLCTRL);
+ if (ret)
+ return ret;
+
+ ret = tc_pllupdate(tc, DP1_PLLCTRL);
+ if (ret)
+ return ret;
+
+ /* Reset/Enable Main Links */
+ dp_phy_ctrl |= DP_PHY_RST | PHY_M1_RST | PHY_M0_RST;
+ ret = regmap_write(tc->regmap, DP_PHY_CTRL, dp_phy_ctrl);
+ usleep_range(100, 200);
+ dp_phy_ctrl &= ~(DP_PHY_RST | PHY_M1_RST | PHY_M0_RST);
+ ret = regmap_write(tc->regmap, DP_PHY_CTRL, dp_phy_ctrl);
+
+ ret = tc_poll_timeout(tc, DP_PHY_CTRL, PHY_RDY, PHY_RDY, 500, 100000);
+ if (ret) {
+ dev_err(dev, "timeout waiting for phy become ready");
+ return ret;
+ }
+
+ /* Set misc: 8 bits per color */
+ ret = regmap_update_bits(tc->regmap, DP0_MISC, BPC_8, BPC_8);
+ if (ret)
+ return ret;
+
+ /*
+ * ASSR mode
+ * on TC358767 side ASSR configured through strap pin
+ * seems there is no way to change this setting from SW
+ *
+ * check is tc configured for same mode
+ */
+ if (tc->assr != tc->link.assr) {
+ dev_dbg(dev, "Trying to set display to ASSR: %d\n",
+ tc->assr);
+ /* try to set ASSR on display side */
+ tmp[0] = tc->assr;
+ ret = drm_dp_dpcd_writeb(aux, DP_EDP_CONFIGURATION_SET, tmp[0]);
+ if (ret < 0)
+ goto err_dpcd_read;
+ /* read back */
+ ret = drm_dp_dpcd_readb(aux, DP_EDP_CONFIGURATION_SET, tmp);
+ if (ret < 0)
+ goto err_dpcd_read;
+
+ if (tmp[0] != tc->assr) {
+ dev_dbg(dev, "Failed to switch display ASSR to %d, falling back to unscrambled mode\n",
+ tc->assr);
+ /* trying with disabled scrambler */
+ tc->link.scrambler_dis = true;
+ }
+ }
+
+ /* Setup Link & DPRx Config for Training */
+ tmp[0] = drm_dp_link_rate_to_bw_code(tc->link.rate);
+ tmp[1] = tc->link.num_lanes;
+
+ if (drm_dp_enhanced_frame_cap(tc->link.dpcd))
+ tmp[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
+
+ ret = drm_dp_dpcd_write(aux, DP_LINK_BW_SET, tmp, 2);
+ if (ret < 0)
+ goto err_dpcd_write;
+
+ /* DOWNSPREAD_CTRL */
+ tmp[0] = tc->link.spread ? DP_SPREAD_AMP_0_5 : 0x00;
+ /* MAIN_LINK_CHANNEL_CODING_SET */
+ tmp[1] = DP_SET_ANSI_8B10B;
+ ret = drm_dp_dpcd_write(aux, DP_DOWNSPREAD_CTRL, tmp, 2);
+ if (ret < 0)
+ goto err_dpcd_write;
+
+ /* Reset voltage-swing & pre-emphasis */
+ tmp[0] = tmp[1] = DP_TRAIN_VOLTAGE_SWING_LEVEL_0 |
+ DP_TRAIN_PRE_EMPH_LEVEL_0;
+ ret = drm_dp_dpcd_write(aux, DP_TRAINING_LANE0_SET, tmp, 2);
+ if (ret < 0)
+ goto err_dpcd_write;
+
+ /* Clock-Recovery */
+
+ /* Set DPCD 0x102 for Training Pattern 1 */
+ ret = regmap_write(tc->regmap, DP0_SNKLTCTRL,
+ DP_LINK_SCRAMBLING_DISABLE |
+ DP_TRAINING_PATTERN_1);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(tc->regmap, DP0_LTLOOPCTRL,
+ (15 << 28) | /* Defer Iteration Count */
+ (15 << 24) | /* Loop Iteration Count */
+ (0xd << 0)); /* Loop Timer Delay */
+ if (ret)
+ return ret;
+
+ ret = regmap_write(tc->regmap, DP0_SRCCTRL,
+ tc_srcctrl(tc) | DP0_SRCCTRL_SCRMBLDIS |
+ DP0_SRCCTRL_AUTOCORRECT |
+ DP0_SRCCTRL_TP1);
+ if (ret)
+ return ret;
+
+ /* Enable DP0 to start Link Training */
+ ret = regmap_write(tc->regmap, DP0CTL,
+ (drm_dp_enhanced_frame_cap(tc->link.dpcd) ?
+ EF_EN : 0) | DP_EN);
+ if (ret)
+ return ret;
+
+ /* wait */
+
+ ret = tc_wait_link_training(tc);
+ if (ret < 0)
+ return ret;
+
+ if (ret) {
+ dev_err(tc->dev, "Link training phase 1 failed: %s\n",
+ training_pattern1_errors[ret]);
+ return -ENODEV;
+ }
+
+ /* Channel Equalization */
+
+ /* Set DPCD 0x102 for Training Pattern 2 */
+ ret = regmap_write(tc->regmap, DP0_SNKLTCTRL,
+ DP_LINK_SCRAMBLING_DISABLE |
+ DP_TRAINING_PATTERN_2);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(tc->regmap, DP0_SRCCTRL,
+ tc_srcctrl(tc) | DP0_SRCCTRL_SCRMBLDIS |
+ DP0_SRCCTRL_AUTOCORRECT |
+ DP0_SRCCTRL_TP2);
+ if (ret)
+ return ret;
+
+ /* wait */
+ ret = tc_wait_link_training(tc);
+ if (ret < 0)
+ return ret;
+
+ if (ret) {
+ dev_err(tc->dev, "Link training phase 2 failed: %s\n",
+ training_pattern2_errors[ret]);
+ return -ENODEV;
+ }
+
+ /*
+ * Toshiba's documentation suggests to first clear DPCD 0x102, then
+ * clear the training pattern bit in DP0_SRCCTRL. Testing shows
+ * that the link sometimes drops if those steps are done in that order,
+ * but if the steps are done in reverse order, the link stays up.
+ *
+ * So we do the steps differently than documented here.
+ */
+
+ /* Clear Training Pattern, set AutoCorrect Mode = 1 */
+ ret = regmap_write(tc->regmap, DP0_SRCCTRL, tc_srcctrl(tc) |
+ DP0_SRCCTRL_AUTOCORRECT);
+ if (ret)
+ return ret;
+
+ /* Clear DPCD 0x102 */
+ /* Note: Can Not use DP0_SNKLTCTRL (0x06E4) short cut */
+ tmp[0] = tc->link.scrambler_dis ? DP_LINK_SCRAMBLING_DISABLE : 0x00;
+ ret = drm_dp_dpcd_writeb(aux, DP_TRAINING_PATTERN_SET, tmp[0]);
+ if (ret < 0)
+ goto err_dpcd_write;
+
+ /* Check link status */
+ ret = drm_dp_dpcd_read_link_status(aux, tmp);
+ if (ret < 0)
+ goto err_dpcd_read;
+
+ ret = 0;
+
+ value = tmp[0] & DP_CHANNEL_EQ_BITS;
+
+ if (value != DP_CHANNEL_EQ_BITS) {
+ dev_err(tc->dev, "Lane 0 failed: %x\n", value);
+ ret = -ENODEV;
+ }
+
+ if (tc->link.num_lanes == 2) {
+ value = (tmp[0] >> 4) & DP_CHANNEL_EQ_BITS;
+
+ if (value != DP_CHANNEL_EQ_BITS) {
+ dev_err(tc->dev, "Lane 1 failed: %x\n", value);
+ ret = -ENODEV;
+ }
+
+ if (!(tmp[2] & DP_INTERLANE_ALIGN_DONE)) {
+ dev_err(tc->dev, "Interlane align failed\n");
+ ret = -ENODEV;
+ }
+ }
+
+ if (ret) {
+ dev_err(dev, "0x0202 LANE0_1_STATUS: 0x%02x\n", tmp[0]);
+ dev_err(dev, "0x0203 LANE2_3_STATUS 0x%02x\n", tmp[1]);
+ dev_err(dev, "0x0204 LANE_ALIGN_STATUS_UPDATED: 0x%02x\n", tmp[2]);
+ dev_err(dev, "0x0205 SINK_STATUS: 0x%02x\n", tmp[3]);
+ dev_err(dev, "0x0206 ADJUST_REQUEST_LANE0_1: 0x%02x\n", tmp[4]);
+ dev_err(dev, "0x0207 ADJUST_REQUEST_LANE2_3: 0x%02x\n", tmp[5]);
+ return ret;
+ }
+
+ return 0;
+err_dpcd_read:
+ dev_err(tc->dev, "Failed to read DPCD: %d\n", ret);
+ return ret;
+err_dpcd_write:
+ dev_err(tc->dev, "Failed to write DPCD: %d\n", ret);
+ return ret;
+}
+
+static int tc_main_link_disable(struct tc_data *tc)
+{
+ int ret;
+
+ dev_dbg(tc->dev, "link disable\n");
+
+ ret = regmap_write(tc->regmap, DP0_SRCCTRL, 0);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(tc->regmap, DP0CTL, 0);
+ if (ret)
+ return ret;
+
+ return regmap_update_bits(tc->regmap, DP_PHY_CTRL,
+ PHY_M0_RST | PHY_M1_RST | PHY_M0_EN,
+ PHY_M0_RST | PHY_M1_RST);
+}
+
+static int tc_dsi_rx_enable(struct tc_data *tc)
+{
+ u32 value;
+ int ret;
+
+ regmap_write(tc->regmap, PPI_D0S_CLRSIPOCOUNT, 25);
+ regmap_write(tc->regmap, PPI_D1S_CLRSIPOCOUNT, 25);
+ regmap_write(tc->regmap, PPI_D2S_CLRSIPOCOUNT, 25);
+ regmap_write(tc->regmap, PPI_D3S_CLRSIPOCOUNT, 25);
+ regmap_write(tc->regmap, PPI_D0S_ATMR, 0);
+ regmap_write(tc->regmap, PPI_D1S_ATMR, 0);
+ regmap_write(tc->regmap, PPI_TX_RX_TA, TTA_GET | TTA_SURE);
+ regmap_write(tc->regmap, PPI_LPTXTIMECNT, LPX_PERIOD);
+
+ value = ((LANEENABLE_L0EN << tc->dsi->lanes) - LANEENABLE_L0EN) |
+ LANEENABLE_CLEN;
+ regmap_write(tc->regmap, PPI_LANEENABLE, value);
+ regmap_write(tc->regmap, DSI_LANEENABLE, value);
+
+ /* Set input interface */
+ value = DP0_AUDSRC_NO_INPUT;
+ if (tc_test_pattern)
+ value |= DP0_VIDSRC_COLOR_BAR;
+ else
+ value |= DP0_VIDSRC_DSI_RX;
+ ret = regmap_write(tc->regmap, SYSCTRL, value);
+ if (ret)
+ return ret;
+
+ usleep_range(120, 150);
+
+ regmap_write(tc->regmap, PPI_STARTPPI, PPI_START_FUNCTION);
+ regmap_write(tc->regmap, DSI_STARTDSI, DSI_RX_START);
+
+ return 0;
+}
+
+static int tc_dpi_rx_enable(struct tc_data *tc)
+{
+ u32 value;
+
+ /* Set input interface */
+ value = DP0_AUDSRC_NO_INPUT;
+ if (tc_test_pattern)
+ value |= DP0_VIDSRC_COLOR_BAR;
+ else
+ value |= DP0_VIDSRC_DPI_RX;
+ return regmap_write(tc->regmap, SYSCTRL, value);
+}
+
+static int tc_dpi_stream_enable(struct tc_data *tc)
+{
+ int ret;
+
+ dev_dbg(tc->dev, "enable video stream\n");
+
+ /* Setup PLL */
+ ret = tc_set_syspllparam(tc);
+ if (ret)
+ return ret;
+
+ /*
+ * Initially PLLs are in bypass. Force PLL parameter update,
+ * disable PLL bypass, enable PLL
+ */
+ ret = tc_pllupdate(tc, DP0_PLLCTRL);
+ if (ret)
+ return ret;
+
+ ret = tc_pllupdate(tc, DP1_PLLCTRL);
+ if (ret)
+ return ret;
+
+ /* Pixel PLL must always be enabled for DPI mode */
+ ret = tc_pxl_pll_en(tc, clk_get_rate(tc->refclk),
+ 1000 * tc->mode.clock);
+ if (ret)
+ return ret;
+
+ ret = tc_set_common_video_mode(tc, &tc->mode);
+ if (ret)
+ return ret;
+
+ ret = tc_set_dpi_video_mode(tc, &tc->mode);
+ if (ret)
+ return ret;
+
+ return tc_dsi_rx_enable(tc);
+}
+
+static int tc_dpi_stream_disable(struct tc_data *tc)
+{
+ dev_dbg(tc->dev, "disable video stream\n");
+
+ tc_pxl_pll_dis(tc);
+
+ return 0;
+}
+
+static int tc_edp_stream_enable(struct tc_data *tc)
+{
+ int ret;
+ u32 value;
+
+ dev_dbg(tc->dev, "enable video stream\n");
+
+ /*
+ * Pixel PLL must be enabled for DSI input mode and test pattern.
+ *
+ * Per TC9595XBG datasheet Revision 0.1 2018-12-27 Figure 4.18
+ * "Clock Mode Selection and Clock Sources", either Pixel PLL
+ * or DPI_PCLK supplies StrmClk. DPI_PCLK is only available in
+ * case valid Pixel Clock are supplied to the chip DPI input.
+ * In case built-in test pattern is desired OR DSI input mode
+ * is used, DPI_PCLK is not available and thus Pixel PLL must
+ * be used instead.
+ */
+ if (tc->input_connector_dsi || tc_test_pattern) {
+ ret = tc_pxl_pll_en(tc, clk_get_rate(tc->refclk),
+ 1000 * tc->mode.clock);
+ if (ret)
+ return ret;
+ }
+
+ ret = tc_set_common_video_mode(tc, &tc->mode);
+ if (ret)
+ return ret;
+
+ ret = tc_set_edp_video_mode(tc, &tc->mode);
+ if (ret)
+ return ret;
+
+ /* Set M/N */
+ ret = tc_stream_clock_calc(tc);
+ if (ret)
+ return ret;
+
+ value = VID_MN_GEN | DP_EN;
+ if (drm_dp_enhanced_frame_cap(tc->link.dpcd))
+ value |= EF_EN;
+ ret = regmap_write(tc->regmap, DP0CTL, value);
+ if (ret)
+ return ret;
+ /*
+ * VID_EN assertion should be delayed by at least N * LSCLK
+ * cycles from the time VID_MN_GEN is enabled in order to
+ * generate stable values for VID_M. LSCLK is 270 MHz or
+ * 162 MHz, VID_N is set to 32768 in tc_stream_clock_calc(),
+ * so a delay of at least 203 us should suffice.
+ */
+ usleep_range(500, 1000);
+ value |= VID_EN;
+ ret = regmap_write(tc->regmap, DP0CTL, value);
+ if (ret)
+ return ret;
+
+ /* Set input interface */
+ if (tc->input_connector_dsi)
+ return tc_dsi_rx_enable(tc);
+ else
+ return tc_dpi_rx_enable(tc);
+}
+
+static int tc_edp_stream_disable(struct tc_data *tc)
+{
+ int ret;
+
+ dev_dbg(tc->dev, "disable video stream\n");
+
+ ret = regmap_update_bits(tc->regmap, DP0CTL, VID_EN, 0);
+ if (ret)
+ return ret;
+
+ tc_pxl_pll_dis(tc);
+
+ return 0;
+}
+
+static void
+tc_dpi_bridge_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+ int ret;
+
+ ret = tc_dpi_stream_enable(tc);
+ if (ret < 0) {
+ dev_err(tc->dev, "main link stream start error: %d\n", ret);
+ tc_main_link_disable(tc);
+ return;
+ }
+}
+
+static void
+tc_dpi_bridge_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+ int ret;
+
+ ret = tc_dpi_stream_disable(tc);
+ if (ret < 0)
+ dev_err(tc->dev, "main link stream stop error: %d\n", ret);
+}
+
+static void
+tc_edp_bridge_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+ int ret;
+
+ ret = tc_get_display_props(tc);
+ if (ret < 0) {
+ dev_err(tc->dev, "failed to read display props: %d\n", ret);
+ return;
+ }
+
+ ret = tc_main_link_enable(tc);
+ if (ret < 0) {
+ dev_err(tc->dev, "main link enable error: %d\n", ret);
+ return;
+ }
+
+ ret = tc_edp_stream_enable(tc);
+ if (ret < 0) {
+ dev_err(tc->dev, "main link stream start error: %d\n", ret);
+ tc_main_link_disable(tc);
+ return;
+ }
+}
+
+static void
+tc_edp_bridge_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+ int ret;
+
+ ret = tc_edp_stream_disable(tc);
+ if (ret < 0)
+ dev_err(tc->dev, "main link stream stop error: %d\n", ret);
+
+ ret = tc_main_link_disable(tc);
+ if (ret < 0)
+ dev_err(tc->dev, "main link disable error: %d\n", ret);
+}
+
+static int tc_dpi_atomic_check(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ /* DSI->DPI interface clock limitation: upto 100 MHz */
+ if (crtc_state->adjusted_mode.clock > 100000)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int tc_edp_atomic_check(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ /* DPI->(e)DP interface clock limitation: upto 154 MHz */
+ if (crtc_state->adjusted_mode.clock > 154000)
+ return -EINVAL;
+
+ return 0;
+}
+
+static enum drm_mode_status
+tc_dpi_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ /* DPI interface clock limitation: upto 100 MHz */
+ if (mode->clock > 100000)
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
+}
+
+static enum drm_mode_status
+tc_edp_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+ u32 req, avail;
+ u32 bits_per_pixel = 24;
+
+ /* DPI interface clock limitation: upto 154 MHz */
+ if (mode->clock > 154000)
+ return MODE_CLOCK_HIGH;
+
+ req = mode->clock * bits_per_pixel / 8;
+ avail = tc->link.num_lanes * tc->link.rate;
+
+ if (req > avail)
+ return MODE_BAD;
+
+ return MODE_OK;
+}
+
+static void tc_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adj)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+
+ drm_mode_copy(&tc->mode, mode);
+}
+
+static struct edid *tc_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+
+ return drm_get_edid(connector, &tc->aux.ddc);
+}
+
+static int tc_connector_get_modes(struct drm_connector *connector)
+{
+ struct tc_data *tc = connector_to_tc(connector);
+ int num_modes;
+ struct edid *edid;
+ int ret;
+
+ ret = tc_get_display_props(tc);
+ if (ret < 0) {
+ dev_err(tc->dev, "failed to read display props: %d\n", ret);
+ return 0;
+ }
+
+ if (tc->panel_bridge) {
+ num_modes = drm_bridge_get_modes(tc->panel_bridge, connector);
+ if (num_modes > 0)
+ return num_modes;
+ }
+
+ edid = tc_get_edid(&tc->bridge, connector);
+ num_modes = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+
+ return num_modes;
+}
+
+static const struct drm_connector_helper_funcs tc_connector_helper_funcs = {
+ .get_modes = tc_connector_get_modes,
+};
+
+static enum drm_connector_status tc_bridge_detect(struct drm_bridge *bridge)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+ bool conn;
+ u32 val;
+ int ret;
+
+ ret = regmap_read(tc->regmap, GPIOI, &val);
+ if (ret)
+ return connector_status_unknown;
+
+ conn = val & BIT(tc->hpd_pin);
+
+ if (conn)
+ return connector_status_connected;
+ else
+ return connector_status_disconnected;
+}
+
+static enum drm_connector_status
+tc_connector_detect(struct drm_connector *connector, bool force)
+{
+ struct tc_data *tc = connector_to_tc(connector);
+
+ if (tc->hpd_pin >= 0)
+ return tc_bridge_detect(&tc->bridge);
+
+ if (tc->panel_bridge)
+ return connector_status_connected;
+ else
+ return connector_status_unknown;
+}
+
+static const struct drm_connector_funcs tc_connector_funcs = {
+ .detect = tc_connector_detect,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int tc_dpi_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+
+ if (!tc->panel_bridge)
+ return 0;
+
+ return drm_bridge_attach(tc->bridge.encoder, tc->panel_bridge,
+ &tc->bridge, flags);
+}
+
+static int tc_edp_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+ struct tc_data *tc = bridge_to_tc(bridge);
+ struct drm_device *drm = bridge->dev;
+ int ret;
+
+ if (tc->panel_bridge) {
+ /* If a connector is required then this driver shall create it */
+ ret = drm_bridge_attach(tc->bridge.encoder, tc->panel_bridge,
+ &tc->bridge, flags | DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+ if (ret)
+ return ret;
+ }
+
+ if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
+ return 0;
+
+ tc->aux.drm_dev = drm;
+ ret = drm_dp_aux_register(&tc->aux);
+ if (ret < 0)
+ return ret;
+
+ /* Create DP/eDP connector */
+ drm_connector_helper_add(&tc->connector, &tc_connector_helper_funcs);
+ ret = drm_connector_init(drm, &tc->connector, &tc_connector_funcs, tc->bridge.type);
+ if (ret)
+ goto aux_unregister;
+
+ /* Don't poll if don't have HPD connected */
+ if (tc->hpd_pin >= 0) {
+ if (tc->have_irq)
+ tc->connector.polled = DRM_CONNECTOR_POLL_HPD;
+ else
+ tc->connector.polled = DRM_CONNECTOR_POLL_CONNECT |
+ DRM_CONNECTOR_POLL_DISCONNECT;
+ }
+
+ drm_display_info_set_bus_formats(&tc->connector.display_info,
+ &bus_format, 1);
+ tc->connector.display_info.bus_flags =
+ DRM_BUS_FLAG_DE_HIGH |
+ DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE |
+ DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE;
+ drm_connector_attach_encoder(&tc->connector, tc->bridge.encoder);
+
+ return 0;
+aux_unregister:
+ drm_dp_aux_unregister(&tc->aux);
+ return ret;
+}
+
+static void tc_edp_bridge_detach(struct drm_bridge *bridge)
+{
+ drm_dp_aux_unregister(&bridge_to_tc(bridge)->aux);
+}
+
+#define MAX_INPUT_SEL_FORMATS 1
+
+static u32 *
+tc_dpi_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ u32 *input_fmts;
+
+ *num_input_fmts = 0;
+
+ input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
+ GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ /* This is the DSI-end bus format */
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
+ *num_input_fmts = 1;
+
+ return input_fmts;
+}
+
+static const struct drm_bridge_funcs tc_dpi_bridge_funcs = {
+ .attach = tc_dpi_bridge_attach,
+ .mode_valid = tc_dpi_mode_valid,
+ .mode_set = tc_bridge_mode_set,
+ .atomic_check = tc_dpi_atomic_check,
+ .atomic_enable = tc_dpi_bridge_atomic_enable,
+ .atomic_disable = tc_dpi_bridge_atomic_disable,
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .atomic_get_input_bus_fmts = tc_dpi_atomic_get_input_bus_fmts,
+};
+
+static const struct drm_bridge_funcs tc_edp_bridge_funcs = {
+ .attach = tc_edp_bridge_attach,
+ .detach = tc_edp_bridge_detach,
+ .mode_valid = tc_edp_mode_valid,
+ .mode_set = tc_bridge_mode_set,
+ .atomic_check = tc_edp_atomic_check,
+ .atomic_enable = tc_edp_bridge_atomic_enable,
+ .atomic_disable = tc_edp_bridge_atomic_disable,
+ .detect = tc_bridge_detect,
+ .get_edid = tc_get_edid,
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+};
+
+static bool tc_readable_reg(struct device *dev, unsigned int reg)
+{
+ return reg != SYSCTRL;
+}
+
+static const struct regmap_range tc_volatile_ranges[] = {
+ regmap_reg_range(DP0_AUXWDATA(0), DP0_AUXSTATUS),
+ regmap_reg_range(DP0_LTSTAT, DP0_SNKLTCHGREQ),
+ regmap_reg_range(DP_PHY_CTRL, DP_PHY_CTRL),
+ regmap_reg_range(DP0_PLLCTRL, PXL_PLLCTRL),
+ regmap_reg_range(VFUEN0, VFUEN0),
+ regmap_reg_range(INTSTS_G, INTSTS_G),
+ regmap_reg_range(GPIOI, GPIOI),
+};
+
+static const struct regmap_access_table tc_volatile_table = {
+ .yes_ranges = tc_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(tc_volatile_ranges),
+};
+
+static bool tc_writeable_reg(struct device *dev, unsigned int reg)
+{
+ return (reg != TC_IDREG) &&
+ (reg != DP0_LTSTAT) &&
+ (reg != DP0_SNKLTCHGREQ);
+}
+
+static const struct regmap_config tc_regmap_config = {
+ .name = "tc358767",
+ .reg_bits = 16,
+ .val_bits = 32,
+ .reg_stride = 4,
+ .max_register = PLL_DBG,
+ .cache_type = REGCACHE_RBTREE,
+ .readable_reg = tc_readable_reg,
+ .volatile_table = &tc_volatile_table,
+ .writeable_reg = tc_writeable_reg,
+ .reg_format_endian = REGMAP_ENDIAN_BIG,
+ .val_format_endian = REGMAP_ENDIAN_LITTLE,
+};
+
+static irqreturn_t tc_irq_handler(int irq, void *arg)
+{
+ struct tc_data *tc = arg;
+ u32 val;
+ int r;
+
+ r = regmap_read(tc->regmap, INTSTS_G, &val);
+ if (r)
+ return IRQ_NONE;
+
+ if (!val)
+ return IRQ_NONE;
+
+ if (val & INT_SYSERR) {
+ u32 stat = 0;
+
+ regmap_read(tc->regmap, SYSSTAT, &stat);
+
+ dev_err(tc->dev, "syserr %x\n", stat);
+ }
+
+ if (tc->hpd_pin >= 0 && tc->bridge.dev) {
+ /*
+ * H is triggered when the GPIO goes high.
+ *
+ * LC is triggered when the GPIO goes low and stays low for
+ * the duration of LCNT
+ */
+ bool h = val & INT_GPIO_H(tc->hpd_pin);
+ bool lc = val & INT_GPIO_LC(tc->hpd_pin);
+
+ dev_dbg(tc->dev, "GPIO%d: %s %s\n", tc->hpd_pin,
+ h ? "H" : "", lc ? "LC" : "");
+
+ if (h || lc)
+ drm_kms_helper_hotplug_event(tc->bridge.dev);
+ }
+
+ regmap_write(tc->regmap, INTSTS_G, val);
+
+ return IRQ_HANDLED;
+}
+
+static int tc_mipi_dsi_host_attach(struct tc_data *tc)
+{
+ struct device *dev = tc->dev;
+ struct device_node *host_node;
+ struct device_node *endpoint;
+ struct mipi_dsi_device *dsi;
+ struct mipi_dsi_host *host;
+ const struct mipi_dsi_device_info info = {
+ .type = "tc358767",
+ .channel = 0,
+ .node = NULL,
+ };
+ int dsi_lanes, ret;
+
+ endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
+ dsi_lanes = drm_of_get_data_lanes_count(endpoint, 1, 4);
+ host_node = of_graph_get_remote_port_parent(endpoint);
+ host = of_find_mipi_dsi_host_by_node(host_node);
+ of_node_put(host_node);
+ of_node_put(endpoint);
+
+ if (!host)
+ return -EPROBE_DEFER;
+
+ if (dsi_lanes < 0)
+ return dsi_lanes;
+
+ dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
+ if (IS_ERR(dsi))
+ return dev_err_probe(dev, PTR_ERR(dsi),
+ "failed to create dsi device\n");
+
+ tc->dsi = dsi;
+
+ dsi->lanes = dsi_lanes;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
+
+ ret = devm_mipi_dsi_attach(dev, dsi);
+ if (ret < 0) {
+ dev_err(dev, "failed to attach dsi to host: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int tc_probe_dpi_bridge_endpoint(struct tc_data *tc)
+{
+ struct device *dev = tc->dev;
+ struct drm_bridge *bridge;
+ struct drm_panel *panel;
+ int ret;
+
+ /* port@1 is the DPI input/output port */
+ ret = drm_of_find_panel_or_bridge(dev->of_node, 1, 0, &panel, &bridge);
+ if (ret && ret != -ENODEV)
+ return ret;
+
+ if (panel) {
+ bridge = devm_drm_panel_bridge_add(dev, panel);
+ if (IS_ERR(bridge))
+ return PTR_ERR(bridge);
+ }
+
+ if (bridge) {
+ tc->panel_bridge = bridge;
+ tc->bridge.type = DRM_MODE_CONNECTOR_DPI;
+ tc->bridge.funcs = &tc_dpi_bridge_funcs;
+
+ return 0;
+ }
+
+ return ret;
+}
+
+static int tc_probe_edp_bridge_endpoint(struct tc_data *tc)
+{
+ struct device *dev = tc->dev;
+ struct drm_panel *panel;
+ int ret;
+
+ /* port@2 is the output port */
+ ret = drm_of_find_panel_or_bridge(dev->of_node, 2, 0, &panel, NULL);
+ if (ret && ret != -ENODEV)
+ return ret;
+
+ if (panel) {
+ struct drm_bridge *panel_bridge;
+
+ panel_bridge = devm_drm_panel_bridge_add(dev, panel);
+ if (IS_ERR(panel_bridge))
+ return PTR_ERR(panel_bridge);
+
+ tc->panel_bridge = panel_bridge;
+ tc->bridge.type = DRM_MODE_CONNECTOR_eDP;
+ } else {
+ tc->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
+ }
+
+ tc->bridge.funcs = &tc_edp_bridge_funcs;
+ if (tc->hpd_pin >= 0)
+ tc->bridge.ops |= DRM_BRIDGE_OP_DETECT;
+ tc->bridge.ops |= DRM_BRIDGE_OP_EDID;
+
+ return 0;
+}
+
+static int tc_probe_bridge_endpoint(struct tc_data *tc)
+{
+ struct device *dev = tc->dev;
+ struct of_endpoint endpoint;
+ struct device_node *node = NULL;
+ const u8 mode_dpi_to_edp = BIT(1) | BIT(2);
+ const u8 mode_dpi_to_dp = BIT(1);
+ const u8 mode_dsi_to_edp = BIT(0) | BIT(2);
+ const u8 mode_dsi_to_dp = BIT(0);
+ const u8 mode_dsi_to_dpi = BIT(0) | BIT(1);
+ u8 mode = 0;
+
+ /*
+ * Determine bridge configuration.
+ *
+ * Port allocation:
+ * port@0 - DSI input
+ * port@1 - DPI input/output
+ * port@2 - eDP output
+ *
+ * Possible connections:
+ * DPI -> port@1 -> port@2 -> eDP :: [port@0 is not connected]
+ * DSI -> port@0 -> port@2 -> eDP :: [port@1 is not connected]
+ * DSI -> port@0 -> port@1 -> DPI :: [port@2 is not connected]
+ */
+
+ for_each_endpoint_of_node(dev->of_node, node) {
+ of_graph_parse_endpoint(node, &endpoint);
+ if (endpoint.port > 2) {
+ of_node_put(node);
+ return -EINVAL;
+ }
+ mode |= BIT(endpoint.port);
+ }
+
+ if (mode == mode_dpi_to_edp || mode == mode_dpi_to_dp) {
+ tc->input_connector_dsi = false;
+ return tc_probe_edp_bridge_endpoint(tc);
+ } else if (mode == mode_dsi_to_dpi) {
+ tc->input_connector_dsi = true;
+ return tc_probe_dpi_bridge_endpoint(tc);
+ } else if (mode == mode_dsi_to_edp || mode == mode_dsi_to_dp) {
+ tc->input_connector_dsi = true;
+ return tc_probe_edp_bridge_endpoint(tc);
+ }
+
+ dev_warn(dev, "Invalid mode (0x%x) is not supported!\n", mode);
+
+ return -EINVAL;
+}
+
+static void tc_clk_disable(void *data)
+{
+ struct clk *refclk = data;
+
+ clk_disable_unprepare(refclk);
+}
+
+static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct tc_data *tc;
+ int ret;
+
+ tc = devm_kzalloc(dev, sizeof(*tc), GFP_KERNEL);
+ if (!tc)
+ return -ENOMEM;
+
+ tc->dev = dev;
+
+ ret = tc_probe_bridge_endpoint(tc);
+ if (ret)
+ return ret;
+
+ tc->refclk = devm_clk_get(dev, "ref");
+ if (IS_ERR(tc->refclk)) {
+ ret = PTR_ERR(tc->refclk);
+ dev_err(dev, "Failed to get refclk: %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_prepare_enable(tc->refclk);
+ if (ret)
+ return ret;
+
+ ret = devm_add_action_or_reset(dev, tc_clk_disable, tc->refclk);
+ if (ret)
+ return ret;
+
+ /* tRSTW = 100 cycles , at 13 MHz that is ~7.69 us */
+ usleep_range(10, 15);
+
+ /* Shut down GPIO is optional */
+ tc->sd_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
+ if (IS_ERR(tc->sd_gpio))
+ return PTR_ERR(tc->sd_gpio);
+
+ if (tc->sd_gpio) {
+ gpiod_set_value_cansleep(tc->sd_gpio, 0);
+ usleep_range(5000, 10000);
+ }
+
+ /* Reset GPIO is optional */
+ tc->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(tc->reset_gpio))
+ return PTR_ERR(tc->reset_gpio);
+
+ if (tc->reset_gpio) {
+ gpiod_set_value_cansleep(tc->reset_gpio, 1);
+ usleep_range(5000, 10000);
+ }
+
+ tc->regmap = devm_regmap_init_i2c(client, &tc_regmap_config);
+ if (IS_ERR(tc->regmap)) {
+ ret = PTR_ERR(tc->regmap);
+ dev_err(dev, "Failed to initialize regmap: %d\n", ret);
+ return ret;
+ }
+
+ ret = of_property_read_u32(dev->of_node, "toshiba,hpd-pin",
+ &tc->hpd_pin);
+ if (ret) {
+ tc->hpd_pin = -ENODEV;
+ } else {
+ if (tc->hpd_pin < 0 || tc->hpd_pin > 1) {
+ dev_err(dev, "failed to parse HPD number\n");
+ return -EINVAL;
+ }
+ }
+
+ if (client->irq > 0) {
+ /* enable SysErr */
+ regmap_write(tc->regmap, INTCTL_G, INT_SYSERR);
+
+ ret = devm_request_threaded_irq(dev, client->irq,
+ NULL, tc_irq_handler,
+ IRQF_ONESHOT,
+ "tc358767-irq", tc);
+ if (ret) {
+ dev_err(dev, "failed to register dp interrupt\n");
+ return ret;
+ }
+
+ tc->have_irq = true;
+ }
+
+ ret = regmap_read(tc->regmap, TC_IDREG, &tc->rev);
+ if (ret) {
+ dev_err(tc->dev, "can not read device ID: %d\n", ret);
+ return ret;
+ }
+
+ if ((tc->rev != 0x6601) && (tc->rev != 0x6603)) {
+ dev_err(tc->dev, "invalid device ID: 0x%08x\n", tc->rev);
+ return -EINVAL;
+ }
+
+ tc->assr = (tc->rev == 0x6601); /* Enable ASSR for eDP panels */
+
+ if (!tc->reset_gpio) {
+ /*
+ * If the reset pin isn't present, do a software reset. It isn't
+ * as thorough as the hardware reset, as we can't reset the I2C
+ * communication block for obvious reasons, but it's getting the
+ * chip into a defined state.
+ */
+ regmap_update_bits(tc->regmap, SYSRSTENB,
+ ENBLCD0 | ENBBM | ENBDSIRX | ENBREG | ENBHDCP,
+ 0);
+ regmap_update_bits(tc->regmap, SYSRSTENB,
+ ENBLCD0 | ENBBM | ENBDSIRX | ENBREG | ENBHDCP,
+ ENBLCD0 | ENBBM | ENBDSIRX | ENBREG | ENBHDCP);
+ usleep_range(5000, 10000);
+ }
+
+ if (tc->hpd_pin >= 0) {
+ u32 lcnt_reg = tc->hpd_pin == 0 ? INT_GP0_LCNT : INT_GP1_LCNT;
+ u32 h_lc = INT_GPIO_H(tc->hpd_pin) | INT_GPIO_LC(tc->hpd_pin);
+
+ /* Set LCNT to 2ms */
+ regmap_write(tc->regmap, lcnt_reg,
+ clk_get_rate(tc->refclk) * 2 / 1000);
+ /* We need the "alternate" mode for HPD */
+ regmap_write(tc->regmap, GPIOM, BIT(tc->hpd_pin));
+
+ if (tc->have_irq) {
+ /* enable H & LC */
+ regmap_update_bits(tc->regmap, INTCTL_G, h_lc, h_lc);
+ }
+ }
+
+ if (tc->bridge.type != DRM_MODE_CONNECTOR_DPI) { /* (e)DP output */
+ ret = tc_aux_link_setup(tc);
+ if (ret)
+ return ret;
+ }
+
+ tc->bridge.of_node = dev->of_node;
+ drm_bridge_add(&tc->bridge);
+
+ i2c_set_clientdata(client, tc);
+
+ if (tc->input_connector_dsi) { /* DSI input */
+ ret = tc_mipi_dsi_host_attach(tc);
+ if (ret) {
+ drm_bridge_remove(&tc->bridge);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static void tc_remove(struct i2c_client *client)
+{
+ struct tc_data *tc = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&tc->bridge);
+}
+
+static const struct i2c_device_id tc358767_i2c_ids[] = {
+ { "tc358767", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tc358767_i2c_ids);
+
+static const struct of_device_id tc358767_of_ids[] = {
+ { .compatible = "toshiba,tc358767", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, tc358767_of_ids);
+
+static struct i2c_driver tc358767_driver = {
+ .driver = {
+ .name = "tc358767",
+ .of_match_table = tc358767_of_ids,
+ },
+ .id_table = tc358767_i2c_ids,
+ .probe = tc_probe,
+ .remove = tc_remove,
+};
+module_i2c_driver(tc358767_driver);
+
+MODULE_AUTHOR("Andrey Gusakov <andrey.gusakov@cogentembedded.com>");
+MODULE_DESCRIPTION("tc358767 eDP encoder driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/bridge/tc358768.c b/drivers/gpu/drm/bridge/tc358768.c
new file mode 100644
index 000000000..8429b6518
--- /dev/null
+++ b/drivers/gpu/drm/bridge/tc358768.c
@@ -0,0 +1,1156 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Texas Instruments Incorporated - https://www.ti.com
+ * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/media-bus-format.h>
+#include <linux/minmax.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/units.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <video/mipi_display.h>
+#include <video/videomode.h>
+
+/* Global (16-bit addressable) */
+#define TC358768_CHIPID 0x0000
+#define TC358768_SYSCTL 0x0002
+#define TC358768_CONFCTL 0x0004
+#define TC358768_VSDLY 0x0006
+#define TC358768_DATAFMT 0x0008
+#define TC358768_GPIOEN 0x000E
+#define TC358768_GPIODIR 0x0010
+#define TC358768_GPIOIN 0x0012
+#define TC358768_GPIOOUT 0x0014
+#define TC358768_PLLCTL0 0x0016
+#define TC358768_PLLCTL1 0x0018
+#define TC358768_CMDBYTE 0x0022
+#define TC358768_PP_MISC 0x0032
+#define TC358768_DSITX_DT 0x0050
+#define TC358768_FIFOSTATUS 0x00F8
+
+/* Debug (16-bit addressable) */
+#define TC358768_VBUFCTRL 0x00E0
+#define TC358768_DBG_WIDTH 0x00E2
+#define TC358768_DBG_VBLANK 0x00E4
+#define TC358768_DBG_DATA 0x00E8
+
+/* TX PHY (32-bit addressable) */
+#define TC358768_CLW_DPHYCONTTX 0x0100
+#define TC358768_D0W_DPHYCONTTX 0x0104
+#define TC358768_D1W_DPHYCONTTX 0x0108
+#define TC358768_D2W_DPHYCONTTX 0x010C
+#define TC358768_D3W_DPHYCONTTX 0x0110
+#define TC358768_CLW_CNTRL 0x0140
+#define TC358768_D0W_CNTRL 0x0144
+#define TC358768_D1W_CNTRL 0x0148
+#define TC358768_D2W_CNTRL 0x014C
+#define TC358768_D3W_CNTRL 0x0150
+
+/* TX PPI (32-bit addressable) */
+#define TC358768_STARTCNTRL 0x0204
+#define TC358768_DSITXSTATUS 0x0208
+#define TC358768_LINEINITCNT 0x0210
+#define TC358768_LPTXTIMECNT 0x0214
+#define TC358768_TCLK_HEADERCNT 0x0218
+#define TC358768_TCLK_TRAILCNT 0x021C
+#define TC358768_THS_HEADERCNT 0x0220
+#define TC358768_TWAKEUP 0x0224
+#define TC358768_TCLK_POSTCNT 0x0228
+#define TC358768_THS_TRAILCNT 0x022C
+#define TC358768_HSTXVREGCNT 0x0230
+#define TC358768_HSTXVREGEN 0x0234
+#define TC358768_TXOPTIONCNTRL 0x0238
+#define TC358768_BTACNTRL1 0x023C
+
+/* TX CTRL (32-bit addressable) */
+#define TC358768_DSI_CONTROL 0x040C
+#define TC358768_DSI_STATUS 0x0410
+#define TC358768_DSI_INT 0x0414
+#define TC358768_DSI_INT_ENA 0x0418
+#define TC358768_DSICMD_RDFIFO 0x0430
+#define TC358768_DSI_ACKERR 0x0434
+#define TC358768_DSI_ACKERR_INTENA 0x0438
+#define TC358768_DSI_ACKERR_HALT 0x043c
+#define TC358768_DSI_RXERR 0x0440
+#define TC358768_DSI_RXERR_INTENA 0x0444
+#define TC358768_DSI_RXERR_HALT 0x0448
+#define TC358768_DSI_ERR 0x044C
+#define TC358768_DSI_ERR_INTENA 0x0450
+#define TC358768_DSI_ERR_HALT 0x0454
+#define TC358768_DSI_CONFW 0x0500
+#define TC358768_DSI_LPCMD 0x0500
+#define TC358768_DSI_RESET 0x0504
+#define TC358768_DSI_INT_CLR 0x050C
+#define TC358768_DSI_START 0x0518
+
+/* DSITX CTRL (16-bit addressable) */
+#define TC358768_DSICMD_TX 0x0600
+#define TC358768_DSICMD_TYPE 0x0602
+#define TC358768_DSICMD_WC 0x0604
+#define TC358768_DSICMD_WD0 0x0610
+#define TC358768_DSICMD_WD1 0x0612
+#define TC358768_DSICMD_WD2 0x0614
+#define TC358768_DSICMD_WD3 0x0616
+#define TC358768_DSI_EVENT 0x0620
+#define TC358768_DSI_VSW 0x0622
+#define TC358768_DSI_VBPR 0x0624
+#define TC358768_DSI_VACT 0x0626
+#define TC358768_DSI_HSW 0x0628
+#define TC358768_DSI_HBPR 0x062A
+#define TC358768_DSI_HACT 0x062C
+
+/* TC358768_DSI_CONTROL (0x040C) register */
+#define TC358768_DSI_CONTROL_DIS_MODE BIT(15)
+#define TC358768_DSI_CONTROL_TXMD BIT(7)
+#define TC358768_DSI_CONTROL_HSCKMD BIT(5)
+#define TC358768_DSI_CONTROL_EOTDIS BIT(0)
+
+/* TC358768_DSI_CONFW (0x0500) register */
+#define TC358768_DSI_CONFW_MODE_SET (5 << 29)
+#define TC358768_DSI_CONFW_MODE_CLR (6 << 29)
+#define TC358768_DSI_CONFW_ADDR_DSI_CONTROL (0x3 << 24)
+
+static const char * const tc358768_supplies[] = {
+ "vddc", "vddmipi", "vddio"
+};
+
+struct tc358768_dsi_output {
+ struct mipi_dsi_device *dev;
+ struct drm_panel *panel;
+ struct drm_bridge *bridge;
+};
+
+struct tc358768_priv {
+ struct device *dev;
+ struct regmap *regmap;
+ struct gpio_desc *reset_gpio;
+ struct regulator_bulk_data supplies[ARRAY_SIZE(tc358768_supplies)];
+ struct clk *refclk;
+ int enabled;
+ int error;
+
+ struct mipi_dsi_host dsi_host;
+ struct drm_bridge bridge;
+ struct tc358768_dsi_output output;
+
+ u32 pd_lines; /* number of Parallel Port Input Data Lines */
+ u32 dsi_lanes; /* number of DSI Lanes */
+ u32 dsi_bpp; /* number of Bits Per Pixel over DSI */
+
+ /* Parameters for PLL programming */
+ u32 fbd; /* PLL feedback divider */
+ u32 prd; /* PLL input divider */
+ u32 frs; /* PLL Freqency range for HSCK (post divider) */
+
+ u32 dsiclk; /* pll_clk / 2 */
+};
+
+static inline struct tc358768_priv *dsi_host_to_tc358768(struct mipi_dsi_host
+ *host)
+{
+ return container_of(host, struct tc358768_priv, dsi_host);
+}
+
+static inline struct tc358768_priv *bridge_to_tc358768(struct drm_bridge
+ *bridge)
+{
+ return container_of(bridge, struct tc358768_priv, bridge);
+}
+
+static int tc358768_clear_error(struct tc358768_priv *priv)
+{
+ int ret = priv->error;
+
+ priv->error = 0;
+ return ret;
+}
+
+static void tc358768_write(struct tc358768_priv *priv, u32 reg, u32 val)
+{
+ /* work around https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 */
+ int tmpval = val;
+ size_t count = 2;
+
+ if (priv->error)
+ return;
+
+ /* 16-bit register? */
+ if (reg < 0x100 || reg >= 0x600)
+ count = 1;
+
+ priv->error = regmap_bulk_write(priv->regmap, reg, &tmpval, count);
+}
+
+static void tc358768_read(struct tc358768_priv *priv, u32 reg, u32 *val)
+{
+ size_t count = 2;
+
+ if (priv->error)
+ return;
+
+ /* 16-bit register? */
+ if (reg < 0x100 || reg >= 0x600) {
+ *val = 0;
+ count = 1;
+ }
+
+ priv->error = regmap_bulk_read(priv->regmap, reg, val, count);
+}
+
+static void tc358768_update_bits(struct tc358768_priv *priv, u32 reg, u32 mask,
+ u32 val)
+{
+ u32 tmp, orig;
+
+ tc358768_read(priv, reg, &orig);
+
+ if (priv->error)
+ return;
+
+ tmp = orig & ~mask;
+ tmp |= val & mask;
+ if (tmp != orig)
+ tc358768_write(priv, reg, tmp);
+}
+
+static int tc358768_sw_reset(struct tc358768_priv *priv)
+{
+ /* Assert Reset */
+ tc358768_write(priv, TC358768_SYSCTL, 1);
+ /* Release Reset, Exit Sleep */
+ tc358768_write(priv, TC358768_SYSCTL, 0);
+
+ return tc358768_clear_error(priv);
+}
+
+static void tc358768_hw_enable(struct tc358768_priv *priv)
+{
+ int ret;
+
+ if (priv->enabled)
+ return;
+
+ ret = clk_prepare_enable(priv->refclk);
+ if (ret < 0)
+ dev_err(priv->dev, "error enabling refclk (%d)\n", ret);
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
+ if (ret < 0)
+ dev_err(priv->dev, "error enabling regulators (%d)\n", ret);
+
+ if (priv->reset_gpio)
+ usleep_range(200, 300);
+
+ /*
+ * The RESX is active low (GPIO_ACTIVE_LOW).
+ * DEASSERT (value = 0) the reset_gpio to enable the chip
+ */
+ gpiod_set_value_cansleep(priv->reset_gpio, 0);
+
+ /* wait for encoder clocks to stabilize */
+ usleep_range(1000, 2000);
+
+ priv->enabled = true;
+}
+
+static void tc358768_hw_disable(struct tc358768_priv *priv)
+{
+ int ret;
+
+ if (!priv->enabled)
+ return;
+
+ /*
+ * The RESX is active low (GPIO_ACTIVE_LOW).
+ * ASSERT (value = 1) the reset_gpio to disable the chip
+ */
+ gpiod_set_value_cansleep(priv->reset_gpio, 1);
+
+ ret = regulator_bulk_disable(ARRAY_SIZE(priv->supplies),
+ priv->supplies);
+ if (ret < 0)
+ dev_err(priv->dev, "error disabling regulators (%d)\n", ret);
+
+ clk_disable_unprepare(priv->refclk);
+
+ priv->enabled = false;
+}
+
+static u32 tc358768_pll_to_pclk(struct tc358768_priv *priv, u32 pll_clk)
+{
+ return (u32)div_u64((u64)pll_clk * priv->dsi_lanes, priv->dsi_bpp);
+}
+
+static u32 tc358768_pclk_to_pll(struct tc358768_priv *priv, u32 pclk)
+{
+ return (u32)div_u64((u64)pclk * priv->dsi_bpp, priv->dsi_lanes);
+}
+
+static int tc358768_calc_pll(struct tc358768_priv *priv,
+ const struct drm_display_mode *mode,
+ bool verify_only)
+{
+ static const u32 frs_limits[] = {
+ 1000000000,
+ 500000000,
+ 250000000,
+ 125000000,
+ 62500000
+ };
+ unsigned long refclk;
+ u32 prd, target_pll, i, max_pll, min_pll;
+ u32 frs, best_diff, best_pll, best_prd, best_fbd;
+
+ target_pll = tc358768_pclk_to_pll(priv, mode->clock * 1000);
+
+ /* pll_clk = RefClk * [(FBD + 1)/ (PRD + 1)] * [1 / (2^FRS)] */
+
+ for (i = 0; i < ARRAY_SIZE(frs_limits); i++)
+ if (target_pll >= frs_limits[i])
+ break;
+
+ if (i == ARRAY_SIZE(frs_limits) || i == 0)
+ return -EINVAL;
+
+ frs = i - 1;
+ max_pll = frs_limits[i - 1];
+ min_pll = frs_limits[i];
+
+ refclk = clk_get_rate(priv->refclk);
+
+ best_diff = UINT_MAX;
+ best_pll = 0;
+ best_prd = 0;
+ best_fbd = 0;
+
+ for (prd = 0; prd < 16; ++prd) {
+ u32 divisor = (prd + 1) * (1 << frs);
+ u32 fbd;
+
+ for (fbd = 0; fbd < 512; ++fbd) {
+ u32 pll, diff, pll_in;
+
+ pll = (u32)div_u64((u64)refclk * (fbd + 1), divisor);
+
+ if (pll >= max_pll || pll < min_pll)
+ continue;
+
+ pll_in = (u32)div_u64((u64)refclk, prd + 1);
+ if (pll_in < 4000000)
+ continue;
+
+ diff = max(pll, target_pll) - min(pll, target_pll);
+
+ if (diff < best_diff) {
+ best_diff = diff;
+ best_pll = pll;
+ best_prd = prd;
+ best_fbd = fbd;
+
+ if (best_diff == 0)
+ goto found;
+ }
+ }
+ }
+
+ if (best_diff == UINT_MAX) {
+ dev_err(priv->dev, "could not find suitable PLL setup\n");
+ return -EINVAL;
+ }
+
+found:
+ if (verify_only)
+ return 0;
+
+ priv->fbd = best_fbd;
+ priv->prd = best_prd;
+ priv->frs = frs;
+ priv->dsiclk = best_pll / 2;
+
+ return 0;
+}
+
+static int tc358768_dsi_host_attach(struct mipi_dsi_host *host,
+ struct mipi_dsi_device *dev)
+{
+ struct tc358768_priv *priv = dsi_host_to_tc358768(host);
+ struct drm_bridge *bridge;
+ struct drm_panel *panel;
+ struct device_node *ep;
+ int ret;
+
+ if (dev->lanes > 4) {
+ dev_err(priv->dev, "unsupported number of data lanes(%u)\n",
+ dev->lanes);
+ return -EINVAL;
+ }
+
+ /*
+ * tc358768 supports both Video and Pulse mode, but the driver only
+ * implements Video (event) mode currently
+ */
+ if (!(dev->mode_flags & MIPI_DSI_MODE_VIDEO)) {
+ dev_err(priv->dev, "Only MIPI_DSI_MODE_VIDEO is supported\n");
+ return -ENOTSUPP;
+ }
+
+ /*
+ * tc358768 supports RGB888, RGB666, RGB666_PACKED and RGB565, but only
+ * RGB888 is verified.
+ */
+ if (dev->format != MIPI_DSI_FMT_RGB888) {
+ dev_warn(priv->dev, "Only MIPI_DSI_FMT_RGB888 tested!\n");
+ return -ENOTSUPP;
+ }
+
+ ret = drm_of_find_panel_or_bridge(host->dev->of_node, 1, 0, &panel,
+ &bridge);
+ if (ret)
+ return ret;
+
+ if (panel) {
+ bridge = drm_panel_bridge_add_typed(panel,
+ DRM_MODE_CONNECTOR_DSI);
+ if (IS_ERR(bridge))
+ return PTR_ERR(bridge);
+ }
+
+ priv->output.dev = dev;
+ priv->output.bridge = bridge;
+ priv->output.panel = panel;
+
+ priv->dsi_lanes = dev->lanes;
+ priv->dsi_bpp = mipi_dsi_pixel_format_to_bpp(dev->format);
+
+ /* get input ep (port0/endpoint0) */
+ ret = -EINVAL;
+ ep = of_graph_get_endpoint_by_regs(host->dev->of_node, 0, 0);
+ if (ep) {
+ ret = of_property_read_u32(ep, "data-lines", &priv->pd_lines);
+
+ of_node_put(ep);
+ }
+
+ if (ret)
+ priv->pd_lines = priv->dsi_bpp;
+
+ drm_bridge_add(&priv->bridge);
+
+ return 0;
+}
+
+static int tc358768_dsi_host_detach(struct mipi_dsi_host *host,
+ struct mipi_dsi_device *dev)
+{
+ struct tc358768_priv *priv = dsi_host_to_tc358768(host);
+
+ drm_bridge_remove(&priv->bridge);
+ if (priv->output.panel)
+ drm_panel_bridge_remove(priv->output.bridge);
+
+ return 0;
+}
+
+static ssize_t tc358768_dsi_host_transfer(struct mipi_dsi_host *host,
+ const struct mipi_dsi_msg *msg)
+{
+ struct tc358768_priv *priv = dsi_host_to_tc358768(host);
+ struct mipi_dsi_packet packet;
+ int ret;
+
+ if (!priv->enabled) {
+ dev_err(priv->dev, "Bridge is not enabled\n");
+ return -ENODEV;
+ }
+
+ if (msg->rx_len) {
+ dev_warn(priv->dev, "MIPI rx is not supported\n");
+ return -ENOTSUPP;
+ }
+
+ if (msg->tx_len > 8) {
+ dev_warn(priv->dev, "Maximum 8 byte MIPI tx is supported\n");
+ return -ENOTSUPP;
+ }
+
+ ret = mipi_dsi_create_packet(&packet, msg);
+ if (ret)
+ return ret;
+
+ if (mipi_dsi_packet_format_is_short(msg->type)) {
+ tc358768_write(priv, TC358768_DSICMD_TYPE,
+ (0x10 << 8) | (packet.header[0] & 0x3f));
+ tc358768_write(priv, TC358768_DSICMD_WC, 0);
+ tc358768_write(priv, TC358768_DSICMD_WD0,
+ (packet.header[2] << 8) | packet.header[1]);
+ } else {
+ int i;
+
+ tc358768_write(priv, TC358768_DSICMD_TYPE,
+ (0x40 << 8) | (packet.header[0] & 0x3f));
+ tc358768_write(priv, TC358768_DSICMD_WC, packet.payload_length);
+ for (i = 0; i < packet.payload_length; i += 2) {
+ u16 val = packet.payload[i];
+
+ if (i + 1 < packet.payload_length)
+ val |= packet.payload[i + 1] << 8;
+
+ tc358768_write(priv, TC358768_DSICMD_WD0 + i, val);
+ }
+ }
+
+ /* start transfer */
+ tc358768_write(priv, TC358768_DSICMD_TX, 1);
+
+ ret = tc358768_clear_error(priv);
+ if (ret)
+ dev_warn(priv->dev, "Software disable failed: %d\n", ret);
+ else
+ ret = packet.size;
+
+ return ret;
+}
+
+static const struct mipi_dsi_host_ops tc358768_dsi_host_ops = {
+ .attach = tc358768_dsi_host_attach,
+ .detach = tc358768_dsi_host_detach,
+ .transfer = tc358768_dsi_host_transfer,
+};
+
+static int tc358768_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct tc358768_priv *priv = bridge_to_tc358768(bridge);
+
+ if (!drm_core_check_feature(bridge->dev, DRIVER_ATOMIC)) {
+ dev_err(priv->dev, "needs atomic updates support\n");
+ return -ENOTSUPP;
+ }
+
+ return drm_bridge_attach(bridge->encoder, priv->output.bridge, bridge,
+ flags);
+}
+
+static enum drm_mode_status
+tc358768_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct tc358768_priv *priv = bridge_to_tc358768(bridge);
+
+ if (tc358768_calc_pll(priv, mode, true))
+ return MODE_CLOCK_RANGE;
+
+ return MODE_OK;
+}
+
+static void tc358768_bridge_disable(struct drm_bridge *bridge)
+{
+ struct tc358768_priv *priv = bridge_to_tc358768(bridge);
+ int ret;
+
+ /* set FrmStop */
+ tc358768_update_bits(priv, TC358768_PP_MISC, BIT(15), BIT(15));
+
+ /* wait at least for one frame */
+ msleep(50);
+
+ /* clear PP_en */
+ tc358768_update_bits(priv, TC358768_CONFCTL, BIT(6), 0);
+
+ /* set RstPtr */
+ tc358768_update_bits(priv, TC358768_PP_MISC, BIT(14), BIT(14));
+
+ ret = tc358768_clear_error(priv);
+ if (ret)
+ dev_warn(priv->dev, "Software disable failed: %d\n", ret);
+}
+
+static void tc358768_bridge_post_disable(struct drm_bridge *bridge)
+{
+ struct tc358768_priv *priv = bridge_to_tc358768(bridge);
+
+ tc358768_hw_disable(priv);
+}
+
+static int tc358768_setup_pll(struct tc358768_priv *priv,
+ const struct drm_display_mode *mode)
+{
+ u32 fbd, prd, frs;
+ int ret;
+
+ ret = tc358768_calc_pll(priv, mode, false);
+ if (ret) {
+ dev_err(priv->dev, "PLL calculation failed: %d\n", ret);
+ return ret;
+ }
+
+ fbd = priv->fbd;
+ prd = priv->prd;
+ frs = priv->frs;
+
+ dev_dbg(priv->dev, "PLL: refclk %lu, fbd %u, prd %u, frs %u\n",
+ clk_get_rate(priv->refclk), fbd, prd, frs);
+ dev_dbg(priv->dev, "PLL: pll_clk: %u, DSIClk %u, HSByteClk %u\n",
+ priv->dsiclk * 2, priv->dsiclk, priv->dsiclk / 4);
+ dev_dbg(priv->dev, "PLL: pclk %u (panel: %u)\n",
+ tc358768_pll_to_pclk(priv, priv->dsiclk * 2),
+ mode->clock * 1000);
+
+ /* PRD[15:12] FBD[8:0] */
+ tc358768_write(priv, TC358768_PLLCTL0, (prd << 12) | fbd);
+
+ /* FRS[11:10] LBWS[9:8] CKEN[4] RESETB[1] EN[0] */
+ tc358768_write(priv, TC358768_PLLCTL1,
+ (frs << 10) | (0x2 << 8) | BIT(1) | BIT(0));
+
+ /* wait for lock */
+ usleep_range(1000, 2000);
+
+ /* FRS[11:10] LBWS[9:8] CKEN[4] PLL_CKEN[4] RESETB[1] EN[0] */
+ tc358768_write(priv, TC358768_PLLCTL1,
+ (frs << 10) | (0x2 << 8) | BIT(4) | BIT(1) | BIT(0));
+
+ return tc358768_clear_error(priv);
+}
+
+static u32 tc358768_ns_to_cnt(u32 ns, u32 period_ps)
+{
+ return DIV_ROUND_UP(ns * 1000, period_ps);
+}
+
+static u32 tc358768_ps_to_ns(u32 ps)
+{
+ return ps / 1000;
+}
+
+static void tc358768_bridge_pre_enable(struct drm_bridge *bridge)
+{
+ struct tc358768_priv *priv = bridge_to_tc358768(bridge);
+ struct mipi_dsi_device *dsi_dev = priv->output.dev;
+ unsigned long mode_flags = dsi_dev->mode_flags;
+ u32 val, val2, lptxcnt, hact, data_type;
+ s32 raw_val;
+ const struct drm_display_mode *mode;
+ u32 hsbyteclk_ps, dsiclk_ps, ui_ps;
+ u32 dsiclk, hsbyteclk, video_start;
+ const u32 internal_delay = 40;
+ int ret, i;
+ struct videomode vm;
+ struct device *dev = priv->dev;
+
+ if (mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) {
+ dev_warn_once(dev, "Non-continuous mode unimplemented, falling back to continuous\n");
+ mode_flags &= ~MIPI_DSI_CLOCK_NON_CONTINUOUS;
+ }
+
+ tc358768_hw_enable(priv);
+
+ ret = tc358768_sw_reset(priv);
+ if (ret) {
+ dev_err(dev, "Software reset failed: %d\n", ret);
+ tc358768_hw_disable(priv);
+ return;
+ }
+
+ mode = &bridge->encoder->crtc->state->adjusted_mode;
+ ret = tc358768_setup_pll(priv, mode);
+ if (ret) {
+ dev_err(dev, "PLL setup failed: %d\n", ret);
+ tc358768_hw_disable(priv);
+ return;
+ }
+
+ drm_display_mode_to_videomode(mode, &vm);
+
+ dsiclk = priv->dsiclk;
+ hsbyteclk = dsiclk / 4;
+
+ /* Data Format Control Register */
+ val = BIT(2) | BIT(1) | BIT(0); /* rdswap_en | dsitx_en | txdt_en */
+ switch (dsi_dev->format) {
+ case MIPI_DSI_FMT_RGB888:
+ val |= (0x3 << 4);
+ hact = vm.hactive * 3;
+ video_start = (vm.hsync_len + vm.hback_porch) * 3;
+ data_type = MIPI_DSI_PACKED_PIXEL_STREAM_24;
+ break;
+ case MIPI_DSI_FMT_RGB666:
+ val |= (0x4 << 4);
+ hact = vm.hactive * 3;
+ video_start = (vm.hsync_len + vm.hback_porch) * 3;
+ data_type = MIPI_DSI_PACKED_PIXEL_STREAM_18;
+ break;
+
+ case MIPI_DSI_FMT_RGB666_PACKED:
+ val |= (0x4 << 4) | BIT(3);
+ hact = vm.hactive * 18 / 8;
+ video_start = (vm.hsync_len + vm.hback_porch) * 18 / 8;
+ data_type = MIPI_DSI_PIXEL_STREAM_3BYTE_18;
+ break;
+
+ case MIPI_DSI_FMT_RGB565:
+ val |= (0x5 << 4);
+ hact = vm.hactive * 2;
+ video_start = (vm.hsync_len + vm.hback_porch) * 2;
+ data_type = MIPI_DSI_PACKED_PIXEL_STREAM_16;
+ break;
+ default:
+ dev_err(dev, "Invalid data format (%u)\n",
+ dsi_dev->format);
+ tc358768_hw_disable(priv);
+ return;
+ }
+
+ /* VSDly[9:0] */
+ video_start = max(video_start, internal_delay + 1) - internal_delay;
+ tc358768_write(priv, TC358768_VSDLY, video_start);
+
+ tc358768_write(priv, TC358768_DATAFMT, val);
+ tc358768_write(priv, TC358768_DSITX_DT, data_type);
+
+ /* Enable D-PHY (HiZ->LP11) */
+ tc358768_write(priv, TC358768_CLW_CNTRL, 0x0000);
+ /* Enable lanes */
+ for (i = 0; i < dsi_dev->lanes; i++)
+ tc358768_write(priv, TC358768_D0W_CNTRL + i * 4, 0x0000);
+
+ /* DSI Timings */
+ hsbyteclk_ps = (u32)div_u64(PICO, hsbyteclk);
+ dsiclk_ps = (u32)div_u64(PICO, dsiclk);
+ ui_ps = dsiclk_ps / 2;
+ dev_dbg(dev, "dsiclk: %u ps, ui %u ps, hsbyteclk %u ps\n", dsiclk_ps,
+ ui_ps, hsbyteclk_ps);
+
+ /* LP11 > 100us for D-PHY Rx Init */
+ val = tc358768_ns_to_cnt(100 * 1000, hsbyteclk_ps) - 1;
+ dev_dbg(dev, "LINEINITCNT: %u\n", val);
+ tc358768_write(priv, TC358768_LINEINITCNT, val);
+
+ /* LPTimeCnt > 50ns */
+ val = tc358768_ns_to_cnt(50, hsbyteclk_ps) - 1;
+ lptxcnt = val;
+ dev_dbg(dev, "LPTXTIMECNT: %u\n", val);
+ tc358768_write(priv, TC358768_LPTXTIMECNT, val);
+
+ /* 38ns < TCLK_PREPARE < 95ns */
+ val = tc358768_ns_to_cnt(65, hsbyteclk_ps) - 1;
+ dev_dbg(dev, "TCLK_PREPARECNT %u\n", val);
+ /* TCLK_PREPARE + TCLK_ZERO > 300ns */
+ val2 = tc358768_ns_to_cnt(300 - tc358768_ps_to_ns(2 * ui_ps),
+ hsbyteclk_ps) - 2;
+ dev_dbg(dev, "TCLK_ZEROCNT %u\n", val2);
+ val |= val2 << 8;
+ tc358768_write(priv, TC358768_TCLK_HEADERCNT, val);
+
+ /* TCLK_TRAIL > 60ns AND TEOT <= 105 ns + 12*UI */
+ raw_val = tc358768_ns_to_cnt(60 + tc358768_ps_to_ns(2 * ui_ps), hsbyteclk_ps) - 5;
+ val = clamp(raw_val, 0, 127);
+ dev_dbg(dev, "TCLK_TRAILCNT: %u\n", val);
+ tc358768_write(priv, TC358768_TCLK_TRAILCNT, val);
+
+ /* 40ns + 4*UI < THS_PREPARE < 85ns + 6*UI */
+ val = 50 + tc358768_ps_to_ns(4 * ui_ps);
+ val = tc358768_ns_to_cnt(val, hsbyteclk_ps) - 1;
+ dev_dbg(dev, "THS_PREPARECNT %u\n", val);
+ /* THS_PREPARE + THS_ZERO > 145ns + 10*UI */
+ raw_val = tc358768_ns_to_cnt(145 - tc358768_ps_to_ns(3 * ui_ps), hsbyteclk_ps) - 10;
+ val2 = clamp(raw_val, 0, 127);
+ dev_dbg(dev, "THS_ZEROCNT %u\n", val2);
+ val |= val2 << 8;
+ tc358768_write(priv, TC358768_THS_HEADERCNT, val);
+
+ /* TWAKEUP > 1ms in lptxcnt steps */
+ val = tc358768_ns_to_cnt(1020000, hsbyteclk_ps);
+ val = val / (lptxcnt + 1) - 1;
+ dev_dbg(dev, "TWAKEUP: %u\n", val);
+ tc358768_write(priv, TC358768_TWAKEUP, val);
+
+ /* TCLK_POSTCNT > 60ns + 52*UI */
+ val = tc358768_ns_to_cnt(60 + tc358768_ps_to_ns(52 * ui_ps),
+ hsbyteclk_ps) - 3;
+ dev_dbg(dev, "TCLK_POSTCNT: %u\n", val);
+ tc358768_write(priv, TC358768_TCLK_POSTCNT, val);
+
+ /* max(60ns + 4*UI, 8*UI) < THS_TRAILCNT < 105ns + 12*UI */
+ raw_val = tc358768_ns_to_cnt(60 + tc358768_ps_to_ns(18 * ui_ps),
+ hsbyteclk_ps) - 4;
+ val = clamp(raw_val, 0, 15);
+ dev_dbg(dev, "THS_TRAILCNT: %u\n", val);
+ tc358768_write(priv, TC358768_THS_TRAILCNT, val);
+
+ val = BIT(0);
+ for (i = 0; i < dsi_dev->lanes; i++)
+ val |= BIT(i + 1);
+ tc358768_write(priv, TC358768_HSTXVREGEN, val);
+
+ tc358768_write(priv, TC358768_TXOPTIONCNTRL,
+ (mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) ? 0 : BIT(0));
+
+ /* TXTAGOCNT[26:16] RXTASURECNT[10:0] */
+ val = tc358768_ps_to_ns((lptxcnt + 1) * hsbyteclk_ps * 4);
+ val = tc358768_ns_to_cnt(val, hsbyteclk_ps) / 4 - 1;
+ dev_dbg(dev, "TXTAGOCNT: %u\n", val);
+ val2 = tc358768_ns_to_cnt(tc358768_ps_to_ns((lptxcnt + 1) * hsbyteclk_ps),
+ hsbyteclk_ps) - 2;
+ dev_dbg(dev, "RXTASURECNT: %u\n", val2);
+ val = val << 16 | val2;
+ tc358768_write(priv, TC358768_BTACNTRL1, val);
+
+ /* START[0] */
+ tc358768_write(priv, TC358768_STARTCNTRL, 1);
+
+ if (dsi_dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) {
+ /* Set pulse mode */
+ tc358768_write(priv, TC358768_DSI_EVENT, 0);
+
+ /* vact */
+ tc358768_write(priv, TC358768_DSI_VACT, vm.vactive);
+
+ /* vsw */
+ tc358768_write(priv, TC358768_DSI_VSW, vm.vsync_len);
+
+ /* vbp */
+ tc358768_write(priv, TC358768_DSI_VBPR, vm.vback_porch);
+
+ /* hsw * byteclk * ndl / pclk */
+ val = (u32)div_u64(vm.hsync_len *
+ (u64)hsbyteclk * priv->dsi_lanes,
+ vm.pixelclock);
+ tc358768_write(priv, TC358768_DSI_HSW, val);
+
+ /* hbp * byteclk * ndl / pclk */
+ val = (u32)div_u64(vm.hback_porch *
+ (u64)hsbyteclk * priv->dsi_lanes,
+ vm.pixelclock);
+ tc358768_write(priv, TC358768_DSI_HBPR, val);
+ } else {
+ /* Set event mode */
+ tc358768_write(priv, TC358768_DSI_EVENT, 1);
+
+ /* vact */
+ tc358768_write(priv, TC358768_DSI_VACT, vm.vactive);
+
+ /* vsw (+ vbp) */
+ tc358768_write(priv, TC358768_DSI_VSW,
+ vm.vsync_len + vm.vback_porch);
+
+ /* vbp (not used in event mode) */
+ tc358768_write(priv, TC358768_DSI_VBPR, 0);
+
+ /* (hsw + hbp) * byteclk * ndl / pclk */
+ val = (u32)div_u64((vm.hsync_len + vm.hback_porch) *
+ (u64)hsbyteclk * priv->dsi_lanes,
+ vm.pixelclock);
+ tc358768_write(priv, TC358768_DSI_HSW, val);
+
+ /* hbp (not used in event mode) */
+ tc358768_write(priv, TC358768_DSI_HBPR, 0);
+ }
+
+ /* hact (bytes) */
+ tc358768_write(priv, TC358768_DSI_HACT, hact);
+
+ /* VSYNC polarity */
+ tc358768_update_bits(priv, TC358768_CONFCTL, BIT(5),
+ (mode->flags & DRM_MODE_FLAG_PVSYNC) ? BIT(5) : 0);
+
+ /* HSYNC polarity */
+ tc358768_update_bits(priv, TC358768_PP_MISC, BIT(0),
+ (mode->flags & DRM_MODE_FLAG_PHSYNC) ? BIT(0) : 0);
+
+ /* Start DSI Tx */
+ tc358768_write(priv, TC358768_DSI_START, 0x1);
+
+ /* Configure DSI_Control register */
+ val = TC358768_DSI_CONFW_MODE_CLR | TC358768_DSI_CONFW_ADDR_DSI_CONTROL;
+ val |= TC358768_DSI_CONTROL_TXMD | TC358768_DSI_CONTROL_HSCKMD |
+ 0x3 << 1 | TC358768_DSI_CONTROL_EOTDIS;
+ tc358768_write(priv, TC358768_DSI_CONFW, val);
+
+ val = TC358768_DSI_CONFW_MODE_SET | TC358768_DSI_CONFW_ADDR_DSI_CONTROL;
+ val |= (dsi_dev->lanes - 1) << 1;
+
+ val |= TC358768_DSI_CONTROL_TXMD;
+
+ if (!(mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS))
+ val |= TC358768_DSI_CONTROL_HSCKMD;
+
+ if (dsi_dev->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET)
+ val |= TC358768_DSI_CONTROL_EOTDIS;
+
+ tc358768_write(priv, TC358768_DSI_CONFW, val);
+
+ val = TC358768_DSI_CONFW_MODE_CLR | TC358768_DSI_CONFW_ADDR_DSI_CONTROL;
+ val |= TC358768_DSI_CONTROL_DIS_MODE; /* DSI mode */
+ tc358768_write(priv, TC358768_DSI_CONFW, val);
+
+ ret = tc358768_clear_error(priv);
+ if (ret) {
+ dev_err(dev, "Bridge pre_enable failed: %d\n", ret);
+ tc358768_bridge_disable(bridge);
+ tc358768_bridge_post_disable(bridge);
+ }
+}
+
+static void tc358768_bridge_enable(struct drm_bridge *bridge)
+{
+ struct tc358768_priv *priv = bridge_to_tc358768(bridge);
+ int ret;
+
+ if (!priv->enabled) {
+ dev_err(priv->dev, "Bridge is not enabled\n");
+ return;
+ }
+
+ /* clear FrmStop and RstPtr */
+ tc358768_update_bits(priv, TC358768_PP_MISC, 0x3 << 14, 0);
+
+ /* set PP_en */
+ tc358768_update_bits(priv, TC358768_CONFCTL, BIT(6), BIT(6));
+
+ ret = tc358768_clear_error(priv);
+ if (ret) {
+ dev_err(priv->dev, "Bridge enable failed: %d\n", ret);
+ tc358768_bridge_disable(bridge);
+ tc358768_bridge_post_disable(bridge);
+ }
+}
+
+#define MAX_INPUT_SEL_FORMATS 1
+
+static u32 *
+tc358768_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ struct tc358768_priv *priv = bridge_to_tc358768(bridge);
+ u32 *input_fmts;
+
+ *num_input_fmts = 0;
+
+ input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
+ GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ switch (priv->pd_lines) {
+ case 16:
+ input_fmts[0] = MEDIA_BUS_FMT_RGB565_1X16;
+ break;
+ case 18:
+ input_fmts[0] = MEDIA_BUS_FMT_RGB666_1X18;
+ break;
+ default:
+ case 24:
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
+ break;
+ };
+
+ *num_input_fmts = MAX_INPUT_SEL_FORMATS;
+
+ return input_fmts;
+}
+
+static const struct drm_bridge_funcs tc358768_bridge_funcs = {
+ .attach = tc358768_bridge_attach,
+ .mode_valid = tc358768_bridge_mode_valid,
+ .pre_enable = tc358768_bridge_pre_enable,
+ .enable = tc358768_bridge_enable,
+ .disable = tc358768_bridge_disable,
+ .post_disable = tc358768_bridge_post_disable,
+
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .atomic_get_input_bus_fmts = tc358768_atomic_get_input_bus_fmts,
+};
+
+static const struct drm_bridge_timings default_tc358768_timings = {
+ .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE
+ | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE
+ | DRM_BUS_FLAG_DE_HIGH,
+};
+
+static bool tc358768_is_reserved_reg(unsigned int reg)
+{
+ switch (reg) {
+ case 0x114 ... 0x13f:
+ case 0x200:
+ case 0x20c:
+ case 0x400 ... 0x408:
+ case 0x41c ... 0x42f:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool tc358768_writeable_reg(struct device *dev, unsigned int reg)
+{
+ if (tc358768_is_reserved_reg(reg))
+ return false;
+
+ switch (reg) {
+ case TC358768_CHIPID:
+ case TC358768_FIFOSTATUS:
+ case TC358768_DSITXSTATUS ... (TC358768_DSITXSTATUS + 2):
+ case TC358768_DSI_CONTROL ... (TC358768_DSI_INT_ENA + 2):
+ case TC358768_DSICMD_RDFIFO ... (TC358768_DSI_ERR_HALT + 2):
+ return false;
+ default:
+ return true;
+ }
+}
+
+static bool tc358768_readable_reg(struct device *dev, unsigned int reg)
+{
+ if (tc358768_is_reserved_reg(reg))
+ return false;
+
+ switch (reg) {
+ case TC358768_STARTCNTRL:
+ case TC358768_DSI_CONFW ... (TC358768_DSI_CONFW + 2):
+ case TC358768_DSI_INT_CLR ... (TC358768_DSI_INT_CLR + 2):
+ case TC358768_DSI_START ... (TC358768_DSI_START + 2):
+ case TC358768_DBG_DATA:
+ return false;
+ default:
+ return true;
+ }
+}
+
+static const struct regmap_config tc358768_regmap_config = {
+ .name = "tc358768",
+ .reg_bits = 16,
+ .val_bits = 16,
+ .max_register = TC358768_DSI_HACT,
+ .cache_type = REGCACHE_NONE,
+ .writeable_reg = tc358768_writeable_reg,
+ .readable_reg = tc358768_readable_reg,
+ .reg_format_endian = REGMAP_ENDIAN_BIG,
+ .val_format_endian = REGMAP_ENDIAN_BIG,
+};
+
+static const struct i2c_device_id tc358768_i2c_ids[] = {
+ { "tc358768", 0 },
+ { "tc358778", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tc358768_i2c_ids);
+
+static const struct of_device_id tc358768_of_ids[] = {
+ { .compatible = "toshiba,tc358768", },
+ { .compatible = "toshiba,tc358778", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, tc358768_of_ids);
+
+static int tc358768_get_regulators(struct tc358768_priv *priv)
+{
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(priv->supplies); ++i)
+ priv->supplies[i].supply = tc358768_supplies[i];
+
+ ret = devm_regulator_bulk_get(priv->dev, ARRAY_SIZE(priv->supplies),
+ priv->supplies);
+ if (ret < 0)
+ dev_err(priv->dev, "failed to get regulators: %d\n", ret);
+
+ return ret;
+}
+
+static int tc358768_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct tc358768_priv *priv;
+ struct device *dev = &client->dev;
+ struct device_node *np = dev->of_node;
+ int ret;
+
+ if (!np)
+ return -ENODEV;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, priv);
+ priv->dev = dev;
+
+ ret = tc358768_get_regulators(priv);
+ if (ret)
+ return ret;
+
+ priv->refclk = devm_clk_get(dev, "refclk");
+ if (IS_ERR(priv->refclk))
+ return PTR_ERR(priv->refclk);
+
+ /*
+ * RESX is low active, to disable tc358768 initially (keep in reset)
+ * the gpio line must be LOW. This is the ASSERTED state of
+ * GPIO_ACTIVE_LOW (GPIOD_OUT_HIGH == ASSERTED).
+ */
+ priv->reset_gpio = devm_gpiod_get_optional(dev, "reset",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(priv->reset_gpio))
+ return PTR_ERR(priv->reset_gpio);
+
+ priv->regmap = devm_regmap_init_i2c(client, &tc358768_regmap_config);
+ if (IS_ERR(priv->regmap)) {
+ dev_err(dev, "Failed to init regmap\n");
+ return PTR_ERR(priv->regmap);
+ }
+
+ priv->dsi_host.dev = dev;
+ priv->dsi_host.ops = &tc358768_dsi_host_ops;
+
+ priv->bridge.funcs = &tc358768_bridge_funcs;
+ priv->bridge.timings = &default_tc358768_timings;
+ priv->bridge.of_node = np;
+
+ i2c_set_clientdata(client, priv);
+
+ return mipi_dsi_host_register(&priv->dsi_host);
+}
+
+static void tc358768_i2c_remove(struct i2c_client *client)
+{
+ struct tc358768_priv *priv = i2c_get_clientdata(client);
+
+ mipi_dsi_host_unregister(&priv->dsi_host);
+}
+
+static struct i2c_driver tc358768_driver = {
+ .driver = {
+ .name = "tc358768",
+ .of_match_table = tc358768_of_ids,
+ },
+ .id_table = tc358768_i2c_ids,
+ .probe = tc358768_i2c_probe,
+ .remove = tc358768_i2c_remove,
+};
+module_i2c_driver(tc358768_driver);
+
+MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
+MODULE_DESCRIPTION("TC358768AXBG/TC358778XBG DSI bridge");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/tc358775.c b/drivers/gpu/drm/bridge/tc358775.c
new file mode 100644
index 000000000..02dc12b81
--- /dev/null
+++ b/drivers/gpu/drm/bridge/tc358775.c
@@ -0,0 +1,739 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * TC358775 DSI to LVDS bridge driver
+ *
+ * Copyright (C) 2020 SMART Wireless Computing
+ * Author: Vinay Simha BN <simhavcs@gmail.com>
+ *
+ */
+/* #define DEBUG */
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#include <asm/unaligned.h>
+
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_probe_helper.h>
+
+#define FLD_VAL(val, start, end) FIELD_PREP(GENMASK(start, end), val)
+
+/* Registers */
+
+/* DSI D-PHY Layer Registers */
+#define D0W_DPHYCONTTX 0x0004 /* Data Lane 0 DPHY Tx Control */
+#define CLW_DPHYCONTRX 0x0020 /* Clock Lane DPHY Rx Control */
+#define D0W_DPHYCONTRX 0x0024 /* Data Lane 0 DPHY Rx Control */
+#define D1W_DPHYCONTRX 0x0028 /* Data Lane 1 DPHY Rx Control */
+#define D2W_DPHYCONTRX 0x002C /* Data Lane 2 DPHY Rx Control */
+#define D3W_DPHYCONTRX 0x0030 /* Data Lane 3 DPHY Rx Control */
+#define COM_DPHYCONTRX 0x0038 /* DPHY Rx Common Control */
+#define CLW_CNTRL 0x0040 /* Clock Lane Control */
+#define D0W_CNTRL 0x0044 /* Data Lane 0 Control */
+#define D1W_CNTRL 0x0048 /* Data Lane 1 Control */
+#define D2W_CNTRL 0x004C /* Data Lane 2 Control */
+#define D3W_CNTRL 0x0050 /* Data Lane 3 Control */
+#define DFTMODE_CNTRL 0x0054 /* DFT Mode Control */
+
+/* DSI PPI Layer Registers */
+#define PPI_STARTPPI 0x0104 /* START control bit of PPI-TX function. */
+#define PPI_START_FUNCTION 1
+
+#define PPI_BUSYPPI 0x0108
+#define PPI_LINEINITCNT 0x0110 /* Line Initialization Wait Counter */
+#define PPI_LPTXTIMECNT 0x0114
+#define PPI_LANEENABLE 0x0134 /* Enables each lane at the PPI layer. */
+#define PPI_TX_RX_TA 0x013C /* DSI Bus Turn Around timing parameters */
+
+/* Analog timer function enable */
+#define PPI_CLS_ATMR 0x0140 /* Delay for Clock Lane in LPRX */
+#define PPI_D0S_ATMR 0x0144 /* Delay for Data Lane 0 in LPRX */
+#define PPI_D1S_ATMR 0x0148 /* Delay for Data Lane 1 in LPRX */
+#define PPI_D2S_ATMR 0x014C /* Delay for Data Lane 2 in LPRX */
+#define PPI_D3S_ATMR 0x0150 /* Delay for Data Lane 3 in LPRX */
+
+#define PPI_D0S_CLRSIPOCOUNT 0x0164 /* For lane 0 */
+#define PPI_D1S_CLRSIPOCOUNT 0x0168 /* For lane 1 */
+#define PPI_D2S_CLRSIPOCOUNT 0x016C /* For lane 2 */
+#define PPI_D3S_CLRSIPOCOUNT 0x0170 /* For lane 3 */
+
+#define CLS_PRE 0x0180 /* Digital Counter inside of PHY IO */
+#define D0S_PRE 0x0184 /* Digital Counter inside of PHY IO */
+#define D1S_PRE 0x0188 /* Digital Counter inside of PHY IO */
+#define D2S_PRE 0x018C /* Digital Counter inside of PHY IO */
+#define D3S_PRE 0x0190 /* Digital Counter inside of PHY IO */
+#define CLS_PREP 0x01A0 /* Digital Counter inside of PHY IO */
+#define D0S_PREP 0x01A4 /* Digital Counter inside of PHY IO */
+#define D1S_PREP 0x01A8 /* Digital Counter inside of PHY IO */
+#define D2S_PREP 0x01AC /* Digital Counter inside of PHY IO */
+#define D3S_PREP 0x01B0 /* Digital Counter inside of PHY IO */
+#define CLS_ZERO 0x01C0 /* Digital Counter inside of PHY IO */
+#define D0S_ZERO 0x01C4 /* Digital Counter inside of PHY IO */
+#define D1S_ZERO 0x01C8 /* Digital Counter inside of PHY IO */
+#define D2S_ZERO 0x01CC /* Digital Counter inside of PHY IO */
+#define D3S_ZERO 0x01D0 /* Digital Counter inside of PHY IO */
+
+#define PPI_CLRFLG 0x01E0 /* PRE Counters has reached set values */
+#define PPI_CLRSIPO 0x01E4 /* Clear SIPO values, Slave mode use only. */
+#define HSTIMEOUT 0x01F0 /* HS Rx Time Out Counter */
+#define HSTIMEOUTENABLE 0x01F4 /* Enable HS Rx Time Out Counter */
+#define DSI_STARTDSI 0x0204 /* START control bit of DSI-TX function */
+#define DSI_RX_START 1
+
+#define DSI_BUSYDSI 0x0208
+#define DSI_LANEENABLE 0x0210 /* Enables each lane at the Protocol layer. */
+#define DSI_LANESTATUS0 0x0214 /* Displays lane is in HS RX mode. */
+#define DSI_LANESTATUS1 0x0218 /* Displays lane is in ULPS or STOP state */
+
+#define DSI_INTSTATUS 0x0220 /* Interrupt Status */
+#define DSI_INTMASK 0x0224 /* Interrupt Mask */
+#define DSI_INTCLR 0x0228 /* Interrupt Clear */
+#define DSI_LPTXTO 0x0230 /* Low Power Tx Time Out Counter */
+
+#define DSIERRCNT 0x0300 /* DSI Error Count */
+#define APLCTRL 0x0400 /* Application Layer Control */
+#define RDPKTLN 0x0404 /* Command Read Packet Length */
+
+#define VPCTRL 0x0450 /* Video Path Control */
+#define HTIM1 0x0454 /* Horizontal Timing Control 1 */
+#define HTIM2 0x0458 /* Horizontal Timing Control 2 */
+#define VTIM1 0x045C /* Vertical Timing Control 1 */
+#define VTIM2 0x0460 /* Vertical Timing Control 2 */
+#define VFUEN 0x0464 /* Video Frame Timing Update Enable */
+#define VFUEN_EN BIT(0) /* Upload Enable */
+
+/* Mux Input Select for LVDS LINK Input */
+#define LV_MX0003 0x0480 /* Bit 0 to 3 */
+#define LV_MX0407 0x0484 /* Bit 4 to 7 */
+#define LV_MX0811 0x0488 /* Bit 8 to 11 */
+#define LV_MX1215 0x048C /* Bit 12 to 15 */
+#define LV_MX1619 0x0490 /* Bit 16 to 19 */
+#define LV_MX2023 0x0494 /* Bit 20 to 23 */
+#define LV_MX2427 0x0498 /* Bit 24 to 27 */
+#define LV_MX(b0, b1, b2, b3) (FLD_VAL(b0, 4, 0) | FLD_VAL(b1, 12, 8) | \
+ FLD_VAL(b2, 20, 16) | FLD_VAL(b3, 28, 24))
+
+/* Input bit numbers used in mux registers */
+enum {
+ LVI_R0,
+ LVI_R1,
+ LVI_R2,
+ LVI_R3,
+ LVI_R4,
+ LVI_R5,
+ LVI_R6,
+ LVI_R7,
+ LVI_G0,
+ LVI_G1,
+ LVI_G2,
+ LVI_G3,
+ LVI_G4,
+ LVI_G5,
+ LVI_G6,
+ LVI_G7,
+ LVI_B0,
+ LVI_B1,
+ LVI_B2,
+ LVI_B3,
+ LVI_B4,
+ LVI_B5,
+ LVI_B6,
+ LVI_B7,
+ LVI_HS,
+ LVI_VS,
+ LVI_DE,
+ LVI_L0
+};
+
+#define LVCFG 0x049C /* LVDS Configuration */
+#define LVPHY0 0x04A0 /* LVDS PHY 0 */
+#define LV_PHY0_RST(v) FLD_VAL(v, 22, 22) /* PHY reset */
+#define LV_PHY0_IS(v) FLD_VAL(v, 15, 14)
+#define LV_PHY0_ND(v) FLD_VAL(v, 4, 0) /* Frequency range select */
+#define LV_PHY0_PRBS_ON(v) FLD_VAL(v, 20, 16) /* Clock/Data Flag pins */
+
+#define LVPHY1 0x04A4 /* LVDS PHY 1 */
+#define SYSSTAT 0x0500 /* System Status */
+#define SYSRST 0x0504 /* System Reset */
+
+#define SYS_RST_I2CS BIT(0) /* Reset I2C-Slave controller */
+#define SYS_RST_I2CM BIT(1) /* Reset I2C-Master controller */
+#define SYS_RST_LCD BIT(2) /* Reset LCD controller */
+#define SYS_RST_BM BIT(3) /* Reset Bus Management controller */
+#define SYS_RST_DSIRX BIT(4) /* Reset DSI-RX and App controller */
+#define SYS_RST_REG BIT(5) /* Reset Register module */
+
+/* GPIO Registers */
+#define GPIOC 0x0520 /* GPIO Control */
+#define GPIOO 0x0524 /* GPIO Output */
+#define GPIOI 0x0528 /* GPIO Input */
+
+/* I2C Registers */
+#define I2CTIMCTRL 0x0540 /* I2C IF Timing and Enable Control */
+#define I2CMADDR 0x0544 /* I2C Master Addressing */
+#define WDATAQ 0x0548 /* Write Data Queue */
+#define RDATAQ 0x054C /* Read Data Queue */
+
+/* Chip ID and Revision ID Register */
+#define IDREG 0x0580
+
+#define LPX_PERIOD 4
+#define TTA_GET 0x40000
+#define TTA_SURE 6
+#define SINGLE_LINK 1
+#define DUAL_LINK 2
+
+#define TC358775XBG_ID 0x00007500
+
+/* Debug Registers */
+#define DEBUG00 0x05A0 /* Debug */
+#define DEBUG01 0x05A4 /* LVDS Data */
+
+#define DSI_CLEN_BIT BIT(0)
+#define DIVIDE_BY_3 3 /* PCLK=DCLK/3 */
+#define DIVIDE_BY_6 6 /* PCLK=DCLK/6 */
+#define LVCFG_LVEN_BIT BIT(0)
+
+#define L0EN BIT(1)
+
+#define TC358775_VPCTRL_VSDELAY__MASK 0x3FF00000
+#define TC358775_VPCTRL_VSDELAY__SHIFT 20
+static inline u32 TC358775_VPCTRL_VSDELAY(uint32_t val)
+{
+ return ((val) << TC358775_VPCTRL_VSDELAY__SHIFT) &
+ TC358775_VPCTRL_VSDELAY__MASK;
+}
+
+#define TC358775_VPCTRL_OPXLFMT__MASK 0x00000100
+#define TC358775_VPCTRL_OPXLFMT__SHIFT 8
+static inline u32 TC358775_VPCTRL_OPXLFMT(uint32_t val)
+{
+ return ((val) << TC358775_VPCTRL_OPXLFMT__SHIFT) &
+ TC358775_VPCTRL_OPXLFMT__MASK;
+}
+
+#define TC358775_VPCTRL_MSF__MASK 0x00000001
+#define TC358775_VPCTRL_MSF__SHIFT 0
+static inline u32 TC358775_VPCTRL_MSF(uint32_t val)
+{
+ return ((val) << TC358775_VPCTRL_MSF__SHIFT) &
+ TC358775_VPCTRL_MSF__MASK;
+}
+
+#define TC358775_LVCFG_PCLKDIV__MASK 0x000000f0
+#define TC358775_LVCFG_PCLKDIV__SHIFT 4
+static inline u32 TC358775_LVCFG_PCLKDIV(uint32_t val)
+{
+ return ((val) << TC358775_LVCFG_PCLKDIV__SHIFT) &
+ TC358775_LVCFG_PCLKDIV__MASK;
+}
+
+#define TC358775_LVCFG_LVDLINK__MASK 0x00000002
+#define TC358775_LVCFG_LVDLINK__SHIFT 1
+static inline u32 TC358775_LVCFG_LVDLINK(uint32_t val)
+{
+ return ((val) << TC358775_LVCFG_LVDLINK__SHIFT) &
+ TC358775_LVCFG_LVDLINK__MASK;
+}
+
+enum tc358775_ports {
+ TC358775_DSI_IN,
+ TC358775_LVDS_OUT0,
+ TC358775_LVDS_OUT1,
+};
+
+struct tc_data {
+ struct i2c_client *i2c;
+ struct device *dev;
+
+ struct drm_bridge bridge;
+ struct drm_bridge *panel_bridge;
+
+ struct device_node *host_node;
+ struct mipi_dsi_device *dsi;
+ u8 num_dsi_lanes;
+
+ struct regulator *vdd;
+ struct regulator *vddio;
+ struct gpio_desc *reset_gpio;
+ struct gpio_desc *stby_gpio;
+ u8 lvds_link; /* single-link or dual-link */
+ u8 bpc;
+};
+
+static inline struct tc_data *bridge_to_tc(struct drm_bridge *b)
+{
+ return container_of(b, struct tc_data, bridge);
+}
+
+static void tc_bridge_pre_enable(struct drm_bridge *bridge)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+ struct device *dev = &tc->dsi->dev;
+ int ret;
+
+ ret = regulator_enable(tc->vddio);
+ if (ret < 0)
+ dev_err(dev, "regulator vddio enable failed, %d\n", ret);
+ usleep_range(10000, 11000);
+
+ ret = regulator_enable(tc->vdd);
+ if (ret < 0)
+ dev_err(dev, "regulator vdd enable failed, %d\n", ret);
+ usleep_range(10000, 11000);
+
+ gpiod_set_value(tc->stby_gpio, 0);
+ usleep_range(10000, 11000);
+
+ gpiod_set_value(tc->reset_gpio, 0);
+ usleep_range(10, 20);
+}
+
+static void tc_bridge_post_disable(struct drm_bridge *bridge)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+ struct device *dev = &tc->dsi->dev;
+ int ret;
+
+ gpiod_set_value(tc->reset_gpio, 1);
+ usleep_range(10, 20);
+
+ gpiod_set_value(tc->stby_gpio, 1);
+ usleep_range(10000, 11000);
+
+ ret = regulator_disable(tc->vdd);
+ if (ret < 0)
+ dev_err(dev, "regulator vdd disable failed, %d\n", ret);
+ usleep_range(10000, 11000);
+
+ ret = regulator_disable(tc->vddio);
+ if (ret < 0)
+ dev_err(dev, "regulator vddio disable failed, %d\n", ret);
+ usleep_range(10000, 11000);
+}
+
+static void d2l_read(struct i2c_client *i2c, u16 addr, u32 *val)
+{
+ int ret;
+ u8 buf_addr[2];
+
+ put_unaligned_be16(addr, buf_addr);
+ ret = i2c_master_send(i2c, buf_addr, sizeof(buf_addr));
+ if (ret < 0)
+ goto fail;
+
+ ret = i2c_master_recv(i2c, (u8 *)val, sizeof(*val));
+ if (ret < 0)
+ goto fail;
+
+ pr_debug("d2l: I2C : addr:%04x value:%08x\n", addr, *val);
+ return;
+
+fail:
+ dev_err(&i2c->dev, "Error %d reading from subaddress 0x%x\n",
+ ret, addr);
+}
+
+static void d2l_write(struct i2c_client *i2c, u16 addr, u32 val)
+{
+ u8 data[6];
+ int ret;
+
+ put_unaligned_be16(addr, data);
+ put_unaligned_le32(val, data + 2);
+
+ ret = i2c_master_send(i2c, data, ARRAY_SIZE(data));
+ if (ret < 0)
+ dev_err(&i2c->dev, "Error %d writing to subaddress 0x%x\n",
+ ret, addr);
+}
+
+/* helper function to access bus_formats */
+static struct drm_connector *get_connector(struct drm_encoder *encoder)
+{
+ struct drm_device *dev = encoder->dev;
+ struct drm_connector *connector;
+
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head)
+ if (connector->encoder == encoder)
+ return connector;
+
+ return NULL;
+}
+
+static void tc_bridge_enable(struct drm_bridge *bridge)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+ u32 hback_porch, hsync_len, hfront_porch, hactive, htime1, htime2;
+ u32 vback_porch, vsync_len, vfront_porch, vactive, vtime1, vtime2;
+ u32 val = 0;
+ u16 dsiclk, clkdiv, byteclk, t1, t2, t3, vsdelay;
+ struct drm_display_mode *mode;
+ struct drm_connector *connector = get_connector(bridge->encoder);
+
+ mode = &bridge->encoder->crtc->state->adjusted_mode;
+
+ hback_porch = mode->htotal - mode->hsync_end;
+ hsync_len = mode->hsync_end - mode->hsync_start;
+ vback_porch = mode->vtotal - mode->vsync_end;
+ vsync_len = mode->vsync_end - mode->vsync_start;
+
+ htime1 = (hback_porch << 16) + hsync_len;
+ vtime1 = (vback_porch << 16) + vsync_len;
+
+ hfront_porch = mode->hsync_start - mode->hdisplay;
+ hactive = mode->hdisplay;
+ vfront_porch = mode->vsync_start - mode->vdisplay;
+ vactive = mode->vdisplay;
+
+ htime2 = (hfront_porch << 16) + hactive;
+ vtime2 = (vfront_porch << 16) + vactive;
+
+ d2l_read(tc->i2c, IDREG, &val);
+
+ dev_info(tc->dev, "DSI2LVDS Chip ID.%02x Revision ID. %02x **\n",
+ (val >> 8) & 0xFF, val & 0xFF);
+
+ d2l_write(tc->i2c, SYSRST, SYS_RST_REG | SYS_RST_DSIRX | SYS_RST_BM |
+ SYS_RST_LCD | SYS_RST_I2CM | SYS_RST_I2CS);
+ usleep_range(30000, 40000);
+
+ d2l_write(tc->i2c, PPI_TX_RX_TA, TTA_GET | TTA_SURE);
+ d2l_write(tc->i2c, PPI_LPTXTIMECNT, LPX_PERIOD);
+ d2l_write(tc->i2c, PPI_D0S_CLRSIPOCOUNT, 3);
+ d2l_write(tc->i2c, PPI_D1S_CLRSIPOCOUNT, 3);
+ d2l_write(tc->i2c, PPI_D2S_CLRSIPOCOUNT, 3);
+ d2l_write(tc->i2c, PPI_D3S_CLRSIPOCOUNT, 3);
+
+ val = ((L0EN << tc->num_dsi_lanes) - L0EN) | DSI_CLEN_BIT;
+ d2l_write(tc->i2c, PPI_LANEENABLE, val);
+ d2l_write(tc->i2c, DSI_LANEENABLE, val);
+
+ d2l_write(tc->i2c, PPI_STARTPPI, PPI_START_FUNCTION);
+ d2l_write(tc->i2c, DSI_STARTDSI, DSI_RX_START);
+
+ if (tc->bpc == 8)
+ val = TC358775_VPCTRL_OPXLFMT(1);
+ else /* bpc = 6; */
+ val = TC358775_VPCTRL_MSF(1);
+
+ dsiclk = mode->crtc_clock * 3 * tc->bpc / tc->num_dsi_lanes / 1000;
+ clkdiv = dsiclk / (tc->lvds_link == DUAL_LINK ? DIVIDE_BY_6 : DIVIDE_BY_3);
+ byteclk = dsiclk / 4;
+ t1 = hactive * (tc->bpc * 3 / 8) / tc->num_dsi_lanes;
+ t2 = ((100000 / clkdiv)) * (hactive + hback_porch + hsync_len + hfront_porch) / 1000;
+ t3 = ((t2 * byteclk) / 100) - (hactive * (tc->bpc * 3 / 8) /
+ tc->num_dsi_lanes);
+
+ vsdelay = (clkdiv * (t1 + t3) / byteclk) - hback_porch - hsync_len - hactive;
+
+ val |= TC358775_VPCTRL_VSDELAY(vsdelay);
+ d2l_write(tc->i2c, VPCTRL, val);
+
+ d2l_write(tc->i2c, HTIM1, htime1);
+ d2l_write(tc->i2c, VTIM1, vtime1);
+ d2l_write(tc->i2c, HTIM2, htime2);
+ d2l_write(tc->i2c, VTIM2, vtime2);
+
+ d2l_write(tc->i2c, VFUEN, VFUEN_EN);
+ d2l_write(tc->i2c, SYSRST, SYS_RST_LCD);
+ d2l_write(tc->i2c, LVPHY0, LV_PHY0_PRBS_ON(4) | LV_PHY0_ND(6));
+
+ dev_dbg(tc->dev, "bus_formats %04x bpc %d\n",
+ connector->display_info.bus_formats[0],
+ tc->bpc);
+ /*
+ * Default hardware register settings of tc358775 configured
+ * with MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA jeida-24 format
+ */
+ if (connector->display_info.bus_formats[0] ==
+ MEDIA_BUS_FMT_RGB888_1X7X4_SPWG) {
+ /* VESA-24 */
+ d2l_write(tc->i2c, LV_MX0003, LV_MX(LVI_R0, LVI_R1, LVI_R2, LVI_R3));
+ d2l_write(tc->i2c, LV_MX0407, LV_MX(LVI_R4, LVI_R7, LVI_R5, LVI_G0));
+ d2l_write(tc->i2c, LV_MX0811, LV_MX(LVI_G1, LVI_G2, LVI_G6, LVI_G7));
+ d2l_write(tc->i2c, LV_MX1215, LV_MX(LVI_G3, LVI_G4, LVI_G5, LVI_B0));
+ d2l_write(tc->i2c, LV_MX1619, LV_MX(LVI_B6, LVI_B7, LVI_B1, LVI_B2));
+ d2l_write(tc->i2c, LV_MX2023, LV_MX(LVI_B3, LVI_B4, LVI_B5, LVI_L0));
+ d2l_write(tc->i2c, LV_MX2427, LV_MX(LVI_HS, LVI_VS, LVI_DE, LVI_R6));
+ } else { /* MEDIA_BUS_FMT_RGB666_1X7X3_SPWG - JEIDA-18 */
+ d2l_write(tc->i2c, LV_MX0003, LV_MX(LVI_R0, LVI_R1, LVI_R2, LVI_R3));
+ d2l_write(tc->i2c, LV_MX0407, LV_MX(LVI_R4, LVI_L0, LVI_R5, LVI_G0));
+ d2l_write(tc->i2c, LV_MX0811, LV_MX(LVI_G1, LVI_G2, LVI_L0, LVI_L0));
+ d2l_write(tc->i2c, LV_MX1215, LV_MX(LVI_G3, LVI_G4, LVI_G5, LVI_B0));
+ d2l_write(tc->i2c, LV_MX1619, LV_MX(LVI_L0, LVI_L0, LVI_B1, LVI_B2));
+ d2l_write(tc->i2c, LV_MX2023, LV_MX(LVI_B3, LVI_B4, LVI_B5, LVI_L0));
+ d2l_write(tc->i2c, LV_MX2427, LV_MX(LVI_HS, LVI_VS, LVI_DE, LVI_L0));
+ }
+
+ d2l_write(tc->i2c, VFUEN, VFUEN_EN);
+
+ val = LVCFG_LVEN_BIT;
+ if (tc->lvds_link == DUAL_LINK) {
+ val |= TC358775_LVCFG_LVDLINK(1);
+ val |= TC358775_LVCFG_PCLKDIV(DIVIDE_BY_6);
+ } else {
+ val |= TC358775_LVCFG_PCLKDIV(DIVIDE_BY_3);
+ }
+ d2l_write(tc->i2c, LVCFG, val);
+}
+
+static enum drm_mode_status
+tc_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+
+ /*
+ * Maximum pixel clock speed 135MHz for single-link
+ * 270MHz for dual-link
+ */
+ if ((mode->clock > 135000 && tc->lvds_link == SINGLE_LINK) ||
+ (mode->clock > 270000 && tc->lvds_link == DUAL_LINK))
+ return MODE_CLOCK_HIGH;
+
+ switch (info->bus_formats[0]) {
+ case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
+ case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
+ /* RGB888 */
+ tc->bpc = 8;
+ break;
+ case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
+ /* RGB666 */
+ tc->bpc = 6;
+ break;
+ default:
+ dev_warn(tc->dev,
+ "unsupported LVDS bus format 0x%04x\n",
+ info->bus_formats[0]);
+ return MODE_NOMODE;
+ }
+
+ return MODE_OK;
+}
+
+static int tc358775_parse_dt(struct device_node *np, struct tc_data *tc)
+{
+ struct device_node *endpoint;
+ struct device_node *parent;
+ struct device_node *remote;
+ int dsi_lanes = -1;
+
+ /*
+ * To get the data-lanes of dsi, we need to access the dsi0_out of port1
+ * of dsi0 endpoint from bridge port0 of d2l_in
+ */
+ endpoint = of_graph_get_endpoint_by_regs(tc->dev->of_node,
+ TC358775_DSI_IN, -1);
+ if (endpoint) {
+ /* dsi0_out node */
+ parent = of_graph_get_remote_port_parent(endpoint);
+ of_node_put(endpoint);
+ if (parent) {
+ /* dsi0 port 1 */
+ dsi_lanes = drm_of_get_data_lanes_count_ep(parent, 1, -1, 1, 4);
+ of_node_put(parent);
+ }
+ }
+
+ if (dsi_lanes < 0)
+ return dsi_lanes;
+
+ tc->num_dsi_lanes = dsi_lanes;
+
+ tc->host_node = of_graph_get_remote_node(np, 0, 0);
+ if (!tc->host_node)
+ return -ENODEV;
+
+ of_node_put(tc->host_node);
+
+ tc->lvds_link = SINGLE_LINK;
+ endpoint = of_graph_get_endpoint_by_regs(tc->dev->of_node,
+ TC358775_LVDS_OUT1, -1);
+ if (endpoint) {
+ remote = of_graph_get_remote_port_parent(endpoint);
+ of_node_put(endpoint);
+
+ if (remote) {
+ if (of_device_is_available(remote))
+ tc->lvds_link = DUAL_LINK;
+ of_node_put(remote);
+ }
+ }
+
+ dev_dbg(tc->dev, "no.of dsi lanes: %d\n", tc->num_dsi_lanes);
+ dev_dbg(tc->dev, "operating in %d-link mode\n", tc->lvds_link);
+
+ return 0;
+}
+
+static int tc_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct tc_data *tc = bridge_to_tc(bridge);
+
+ /* Attach the panel-bridge to the dsi bridge */
+ return drm_bridge_attach(bridge->encoder, tc->panel_bridge,
+ &tc->bridge, flags);
+}
+
+static const struct drm_bridge_funcs tc_bridge_funcs = {
+ .attach = tc_bridge_attach,
+ .pre_enable = tc_bridge_pre_enable,
+ .enable = tc_bridge_enable,
+ .mode_valid = tc_mode_valid,
+ .post_disable = tc_bridge_post_disable,
+};
+
+static int tc_attach_host(struct tc_data *tc)
+{
+ struct device *dev = &tc->i2c->dev;
+ struct mipi_dsi_host *host;
+ struct mipi_dsi_device *dsi;
+ int ret;
+ const struct mipi_dsi_device_info info = { .type = "tc358775",
+ .channel = 0,
+ .node = NULL,
+ };
+
+ host = of_find_mipi_dsi_host_by_node(tc->host_node);
+ if (!host) {
+ dev_err(dev, "failed to find dsi host\n");
+ return -EPROBE_DEFER;
+ }
+
+ dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
+ if (IS_ERR(dsi)) {
+ dev_err(dev, "failed to create dsi device\n");
+ return PTR_ERR(dsi);
+ }
+
+ tc->dsi = dsi;
+
+ dsi->lanes = tc->num_dsi_lanes;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO;
+
+ ret = devm_mipi_dsi_attach(dev, dsi);
+ if (ret < 0) {
+ dev_err(dev, "failed to attach dsi to host\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct tc_data *tc;
+ int ret;
+
+ tc = devm_kzalloc(dev, sizeof(*tc), GFP_KERNEL);
+ if (!tc)
+ return -ENOMEM;
+
+ tc->dev = dev;
+ tc->i2c = client;
+
+ tc->panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node,
+ TC358775_LVDS_OUT0, 0);
+ if (IS_ERR(tc->panel_bridge))
+ return PTR_ERR(tc->panel_bridge);
+
+ ret = tc358775_parse_dt(dev->of_node, tc);
+ if (ret)
+ return ret;
+
+ tc->vddio = devm_regulator_get(dev, "vddio-supply");
+ if (IS_ERR(tc->vddio)) {
+ ret = PTR_ERR(tc->vddio);
+ dev_err(dev, "vddio-supply not found\n");
+ return ret;
+ }
+
+ tc->vdd = devm_regulator_get(dev, "vdd-supply");
+ if (IS_ERR(tc->vdd)) {
+ ret = PTR_ERR(tc->vdd);
+ dev_err(dev, "vdd-supply not found\n");
+ return ret;
+ }
+
+ tc->stby_gpio = devm_gpiod_get(dev, "stby", GPIOD_OUT_HIGH);
+ if (IS_ERR(tc->stby_gpio)) {
+ ret = PTR_ERR(tc->stby_gpio);
+ dev_err(dev, "cannot get stby-gpio %d\n", ret);
+ return ret;
+ }
+
+ tc->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(tc->reset_gpio)) {
+ ret = PTR_ERR(tc->reset_gpio);
+ dev_err(dev, "cannot get reset-gpios %d\n", ret);
+ return ret;
+ }
+
+ tc->bridge.funcs = &tc_bridge_funcs;
+ tc->bridge.of_node = dev->of_node;
+ drm_bridge_add(&tc->bridge);
+
+ i2c_set_clientdata(client, tc);
+
+ ret = tc_attach_host(tc);
+ if (ret)
+ goto err_bridge_remove;
+
+ return 0;
+
+err_bridge_remove:
+ drm_bridge_remove(&tc->bridge);
+ return ret;
+}
+
+static void tc_remove(struct i2c_client *client)
+{
+ struct tc_data *tc = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&tc->bridge);
+}
+
+static const struct i2c_device_id tc358775_i2c_ids[] = {
+ { "tc358775", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tc358775_i2c_ids);
+
+static const struct of_device_id tc358775_of_ids[] = {
+ { .compatible = "toshiba,tc358775", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, tc358775_of_ids);
+
+static struct i2c_driver tc358775_driver = {
+ .driver = {
+ .name = "tc358775",
+ .of_match_table = tc358775_of_ids,
+ },
+ .id_table = tc358775_i2c_ids,
+ .probe = tc_probe,
+ .remove = tc_remove,
+};
+module_i2c_driver(tc358775_driver);
+
+MODULE_AUTHOR("Vinay Simha BN <simhavcs@gmail.com>");
+MODULE_DESCRIPTION("TC358775 DSI/LVDS bridge driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/thc63lvd1024.c b/drivers/gpu/drm/bridge/thc63lvd1024.c
new file mode 100644
index 000000000..e21078b2f
--- /dev/null
+++ b/drivers/gpu/drm/bridge/thc63lvd1024.c
@@ -0,0 +1,260 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * THC63LVD1024 LVDS to parallel data DRM bridge driver.
+ *
+ * Copyright (C) 2018 Jacopo Mondi <jacopo+renesas@jmondi.org>
+ */
+
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#include <drm/drm_bridge.h>
+#include <drm/drm_panel.h>
+
+enum thc63_ports {
+ THC63_LVDS_IN0,
+ THC63_LVDS_IN1,
+ THC63_RGB_OUT0,
+ THC63_RGB_OUT1,
+};
+
+struct thc63_dev {
+ struct device *dev;
+
+ struct regulator *vcc;
+
+ struct gpio_desc *pdwn;
+ struct gpio_desc *oe;
+
+ struct drm_bridge bridge;
+ struct drm_bridge *next;
+
+ struct drm_bridge_timings timings;
+};
+
+static inline struct thc63_dev *to_thc63(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct thc63_dev, bridge);
+}
+
+static int thc63_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct thc63_dev *thc63 = to_thc63(bridge);
+
+ return drm_bridge_attach(bridge->encoder, thc63->next, bridge, flags);
+}
+
+static enum drm_mode_status thc63_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct thc63_dev *thc63 = to_thc63(bridge);
+ unsigned int min_freq;
+ unsigned int max_freq;
+
+ /*
+ * The THC63LVD1024 pixel rate range is 8 to 135 MHz in all modes but
+ * dual-in, single-out where it is 40 to 150 MHz. As dual-in, dual-out
+ * isn't supported by the driver yet, simply derive the limits from the
+ * input mode.
+ */
+ if (thc63->timings.dual_link) {
+ min_freq = 40000;
+ max_freq = 150000;
+ } else {
+ min_freq = 8000;
+ max_freq = 135000;
+ }
+
+ if (mode->clock < min_freq)
+ return MODE_CLOCK_LOW;
+
+ if (mode->clock > max_freq)
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
+}
+
+static void thc63_enable(struct drm_bridge *bridge)
+{
+ struct thc63_dev *thc63 = to_thc63(bridge);
+ int ret;
+
+ ret = regulator_enable(thc63->vcc);
+ if (ret) {
+ dev_err(thc63->dev,
+ "Failed to enable regulator \"vcc\": %d\n", ret);
+ return;
+ }
+
+ gpiod_set_value(thc63->pdwn, 0);
+ gpiod_set_value(thc63->oe, 1);
+}
+
+static void thc63_disable(struct drm_bridge *bridge)
+{
+ struct thc63_dev *thc63 = to_thc63(bridge);
+ int ret;
+
+ gpiod_set_value(thc63->oe, 0);
+ gpiod_set_value(thc63->pdwn, 1);
+
+ ret = regulator_disable(thc63->vcc);
+ if (ret)
+ dev_err(thc63->dev,
+ "Failed to disable regulator \"vcc\": %d\n", ret);
+}
+
+static const struct drm_bridge_funcs thc63_bridge_func = {
+ .attach = thc63_attach,
+ .mode_valid = thc63_mode_valid,
+ .enable = thc63_enable,
+ .disable = thc63_disable,
+};
+
+static int thc63_parse_dt(struct thc63_dev *thc63)
+{
+ struct device_node *endpoint;
+ struct device_node *remote;
+
+ endpoint = of_graph_get_endpoint_by_regs(thc63->dev->of_node,
+ THC63_RGB_OUT0, -1);
+ if (!endpoint) {
+ dev_err(thc63->dev, "Missing endpoint in port@%u\n",
+ THC63_RGB_OUT0);
+ return -ENODEV;
+ }
+
+ remote = of_graph_get_remote_port_parent(endpoint);
+ of_node_put(endpoint);
+ if (!remote) {
+ dev_err(thc63->dev, "Endpoint in port@%u unconnected\n",
+ THC63_RGB_OUT0);
+ return -ENODEV;
+ }
+
+ if (!of_device_is_available(remote)) {
+ dev_err(thc63->dev, "port@%u remote endpoint is disabled\n",
+ THC63_RGB_OUT0);
+ of_node_put(remote);
+ return -ENODEV;
+ }
+
+ thc63->next = of_drm_find_bridge(remote);
+ of_node_put(remote);
+ if (!thc63->next)
+ return -EPROBE_DEFER;
+
+ endpoint = of_graph_get_endpoint_by_regs(thc63->dev->of_node,
+ THC63_LVDS_IN1, -1);
+ if (endpoint) {
+ remote = of_graph_get_remote_port_parent(endpoint);
+ of_node_put(endpoint);
+
+ if (remote) {
+ if (of_device_is_available(remote))
+ thc63->timings.dual_link = true;
+ of_node_put(remote);
+ }
+ }
+
+ dev_dbg(thc63->dev, "operating in %s-link mode\n",
+ thc63->timings.dual_link ? "dual" : "single");
+
+ return 0;
+}
+
+static int thc63_gpio_init(struct thc63_dev *thc63)
+{
+ thc63->oe = devm_gpiod_get_optional(thc63->dev, "oe", GPIOD_OUT_LOW);
+ if (IS_ERR(thc63->oe)) {
+ dev_err(thc63->dev, "Unable to get \"oe-gpios\": %ld\n",
+ PTR_ERR(thc63->oe));
+ return PTR_ERR(thc63->oe);
+ }
+
+ thc63->pdwn = devm_gpiod_get_optional(thc63->dev, "powerdown",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(thc63->pdwn)) {
+ dev_err(thc63->dev, "Unable to get \"powerdown-gpios\": %ld\n",
+ PTR_ERR(thc63->pdwn));
+ return PTR_ERR(thc63->pdwn);
+ }
+
+ return 0;
+}
+
+static int thc63_probe(struct platform_device *pdev)
+{
+ struct thc63_dev *thc63;
+ int ret;
+
+ thc63 = devm_kzalloc(&pdev->dev, sizeof(*thc63), GFP_KERNEL);
+ if (!thc63)
+ return -ENOMEM;
+
+ thc63->dev = &pdev->dev;
+ platform_set_drvdata(pdev, thc63);
+
+ thc63->vcc = devm_regulator_get(thc63->dev, "vcc");
+ if (IS_ERR(thc63->vcc)) {
+ if (PTR_ERR(thc63->vcc) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+
+ dev_err(thc63->dev, "Unable to get \"vcc\" supply: %ld\n",
+ PTR_ERR(thc63->vcc));
+ return PTR_ERR(thc63->vcc);
+ }
+
+ ret = thc63_gpio_init(thc63);
+ if (ret)
+ return ret;
+
+ ret = thc63_parse_dt(thc63);
+ if (ret)
+ return ret;
+
+ thc63->bridge.driver_private = thc63;
+ thc63->bridge.of_node = pdev->dev.of_node;
+ thc63->bridge.funcs = &thc63_bridge_func;
+ thc63->bridge.timings = &thc63->timings;
+
+ drm_bridge_add(&thc63->bridge);
+
+ return 0;
+}
+
+static int thc63_remove(struct platform_device *pdev)
+{
+ struct thc63_dev *thc63 = platform_get_drvdata(pdev);
+
+ drm_bridge_remove(&thc63->bridge);
+
+ return 0;
+}
+
+static const struct of_device_id thc63_match[] = {
+ { .compatible = "thine,thc63lvd1024", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, thc63_match);
+
+static struct platform_driver thc63_driver = {
+ .probe = thc63_probe,
+ .remove = thc63_remove,
+ .driver = {
+ .name = "thc63lvd1024",
+ .of_match_table = thc63_match,
+ },
+};
+module_platform_driver(thc63_driver);
+
+MODULE_AUTHOR("Jacopo Mondi <jacopo@jmondi.org>");
+MODULE_DESCRIPTION("Thine THC63LVD1024 LVDS decoder DRM bridge driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/ti-dlpc3433.c b/drivers/gpu/drm/bridge/ti-dlpc3433.c
new file mode 100644
index 000000000..186a9e2ff
--- /dev/null
+++ b/drivers/gpu/drm/bridge/ti-dlpc3433.c
@@ -0,0 +1,416 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2021 RenewOutReach
+ * Copyright (C) 2021 Amarula Solutions(India)
+ *
+ * Author:
+ * Jagan Teki <jagan@amarulasolutions.com>
+ * Christopher Vollo <chris@renewoutreach.org>
+ */
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_of.h>
+#include <drm/drm_print.h>
+#include <drm/drm_mipi_dsi.h>
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+enum cmd_registers {
+ WR_INPUT_SOURCE = 0x05, /* Write Input Source Select */
+ WR_EXT_SOURCE_FMT = 0x07, /* Write External Video Source Format */
+ WR_IMAGE_CROP = 0x10, /* Write Image Crop */
+ WR_DISPLAY_SIZE = 0x12, /* Write Display Size */
+ WR_IMAGE_FREEZE = 0x1A, /* Write Image Freeze */
+ WR_INPUT_IMAGE_SIZE = 0x2E, /* Write External Input Image Size */
+ WR_RGB_LED_EN = 0x52, /* Write RGB LED Enable */
+ WR_RGB_LED_CURRENT = 0x54, /* Write RGB LED Current */
+ WR_RGB_LED_MAX_CURRENT = 0x5C, /* Write RGB LED Max Current */
+ WR_DSI_HS_CLK = 0xBD, /* Write DSI HS Clock */
+ RD_DEVICE_ID = 0xD4, /* Read Controller Device ID */
+ WR_DSI_PORT_EN = 0xD7, /* Write DSI Port Enable */
+};
+
+enum input_source {
+ INPUT_EXTERNAL_VIDEO = 0,
+ INPUT_TEST_PATTERN,
+ INPUT_SPLASH_SCREEN,
+};
+
+#define DEV_ID_MASK GENMASK(3, 0)
+#define IMAGE_FREESE_EN BIT(0)
+#define DSI_PORT_EN 0
+#define EXT_SOURCE_FMT_DSI 0
+#define RED_LED_EN BIT(0)
+#define GREEN_LED_EN BIT(1)
+#define BLUE_LED_EN BIT(2)
+#define LED_MASK GENMASK(2, 0)
+#define MAX_BYTE_SIZE 8
+
+struct dlpc {
+ struct device *dev;
+ struct drm_bridge bridge;
+ struct drm_bridge *next_bridge;
+ struct device_node *host_node;
+ struct mipi_dsi_device *dsi;
+ struct drm_display_mode mode;
+
+ struct gpio_desc *enable_gpio;
+ struct regulator *vcc_intf;
+ struct regulator *vcc_flsh;
+ struct regmap *regmap;
+ unsigned int dsi_lanes;
+};
+
+static inline struct dlpc *bridge_to_dlpc(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct dlpc, bridge);
+}
+
+static bool dlpc_writeable_noinc_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case WR_IMAGE_CROP:
+ case WR_DISPLAY_SIZE:
+ case WR_INPUT_IMAGE_SIZE:
+ case WR_DSI_HS_CLK:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_range dlpc_volatile_ranges[] = {
+ { .range_min = 0x10, .range_max = 0xBF },
+};
+
+static const struct regmap_access_table dlpc_volatile_table = {
+ .yes_ranges = dlpc_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(dlpc_volatile_ranges),
+};
+
+static struct regmap_config dlpc_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = WR_DSI_PORT_EN,
+ .writeable_noinc_reg = dlpc_writeable_noinc_reg,
+ .volatile_table = &dlpc_volatile_table,
+ .cache_type = REGCACHE_RBTREE,
+ .name = "dlpc3433",
+};
+
+static void dlpc_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct dlpc *dlpc = bridge_to_dlpc(bridge);
+ struct device *dev = dlpc->dev;
+ struct drm_display_mode *mode = &dlpc->mode;
+ struct regmap *regmap = dlpc->regmap;
+ char buf[MAX_BYTE_SIZE];
+ unsigned int devid;
+
+ regmap_read(regmap, RD_DEVICE_ID, &devid);
+ devid &= DEV_ID_MASK;
+
+ DRM_DEV_DEBUG(dev, "DLPC3433 device id: 0x%02x\n", devid);
+
+ if (devid != 0x01) {
+ DRM_DEV_ERROR(dev, "Unsupported DLPC device id: 0x%02x\n", devid);
+ return;
+ }
+
+ /* disable image freeze */
+ regmap_write(regmap, WR_IMAGE_FREEZE, IMAGE_FREESE_EN);
+
+ /* enable DSI port */
+ regmap_write(regmap, WR_DSI_PORT_EN, DSI_PORT_EN);
+
+ memset(buf, 0, MAX_BYTE_SIZE);
+
+ /* set image crop */
+ buf[4] = mode->hdisplay & 0xff;
+ buf[5] = (mode->hdisplay & 0xff00) >> 8;
+ buf[6] = mode->vdisplay & 0xff;
+ buf[7] = (mode->vdisplay & 0xff00) >> 8;
+ regmap_noinc_write(regmap, WR_IMAGE_CROP, buf, MAX_BYTE_SIZE);
+
+ /* set display size */
+ buf[4] = mode->hdisplay & 0xff;
+ buf[5] = (mode->hdisplay & 0xff00) >> 8;
+ buf[6] = mode->vdisplay & 0xff;
+ buf[7] = (mode->vdisplay & 0xff00) >> 8;
+ regmap_noinc_write(regmap, WR_DISPLAY_SIZE, buf, MAX_BYTE_SIZE);
+
+ /* set input image size */
+ buf[0] = mode->hdisplay & 0xff;
+ buf[1] = (mode->hdisplay & 0xff00) >> 8;
+ buf[2] = mode->vdisplay & 0xff;
+ buf[3] = (mode->vdisplay & 0xff00) >> 8;
+ regmap_noinc_write(regmap, WR_INPUT_IMAGE_SIZE, buf, 4);
+
+ /* set external video port */
+ regmap_write(regmap, WR_INPUT_SOURCE, INPUT_EXTERNAL_VIDEO);
+
+ /* set external video format select as DSI */
+ regmap_write(regmap, WR_EXT_SOURCE_FMT, EXT_SOURCE_FMT_DSI);
+
+ /* disable image freeze */
+ regmap_write(regmap, WR_IMAGE_FREEZE, 0x00);
+
+ /* enable RGB led */
+ regmap_update_bits(regmap, WR_RGB_LED_EN, LED_MASK,
+ RED_LED_EN | GREEN_LED_EN | BLUE_LED_EN);
+
+ msleep(10);
+}
+
+static void dlpc_atomic_pre_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct dlpc *dlpc = bridge_to_dlpc(bridge);
+ int ret;
+
+ gpiod_set_value(dlpc->enable_gpio, 1);
+
+ msleep(500);
+
+ ret = regulator_enable(dlpc->vcc_intf);
+ if (ret)
+ DRM_DEV_ERROR(dlpc->dev,
+ "failed to enable VCC_INTF regulator: %d\n", ret);
+
+ ret = regulator_enable(dlpc->vcc_flsh);
+ if (ret)
+ DRM_DEV_ERROR(dlpc->dev,
+ "failed to enable VCC_FLSH regulator: %d\n", ret);
+
+ msleep(10);
+}
+
+static void dlpc_atomic_post_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct dlpc *dlpc = bridge_to_dlpc(bridge);
+
+ regulator_disable(dlpc->vcc_flsh);
+ regulator_disable(dlpc->vcc_intf);
+
+ msleep(10);
+
+ gpiod_set_value(dlpc->enable_gpio, 0);
+
+ msleep(500);
+}
+
+#define MAX_INPUT_SEL_FORMATS 1
+
+static u32 *
+dlpc_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ u32 *input_fmts;
+
+ *num_input_fmts = 0;
+
+ input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
+ GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ /* This is the DSI-end bus format */
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
+ *num_input_fmts = 1;
+
+ return input_fmts;
+}
+
+static void dlpc_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ struct dlpc *dlpc = bridge_to_dlpc(bridge);
+
+ drm_mode_copy(&dlpc->mode, adjusted_mode);
+}
+
+static int dlpc_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct dlpc *dlpc = bridge_to_dlpc(bridge);
+
+ return drm_bridge_attach(bridge->encoder, dlpc->next_bridge, bridge, flags);
+}
+
+static const struct drm_bridge_funcs dlpc_bridge_funcs = {
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_get_input_bus_fmts = dlpc_atomic_get_input_bus_fmts,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .atomic_pre_enable = dlpc_atomic_pre_enable,
+ .atomic_enable = dlpc_atomic_enable,
+ .atomic_post_disable = dlpc_atomic_post_disable,
+ .mode_set = dlpc_mode_set,
+ .attach = dlpc_attach,
+};
+
+static int dlpc3433_parse_dt(struct dlpc *dlpc)
+{
+ struct device *dev = dlpc->dev;
+ struct device_node *endpoint;
+ int ret;
+
+ dlpc->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(dlpc->enable_gpio))
+ return PTR_ERR(dlpc->enable_gpio);
+
+ dlpc->vcc_intf = devm_regulator_get(dlpc->dev, "vcc_intf");
+ if (IS_ERR(dlpc->vcc_intf))
+ return dev_err_probe(dev, PTR_ERR(dlpc->vcc_intf),
+ "failed to get VCC_INTF supply\n");
+
+ dlpc->vcc_flsh = devm_regulator_get(dlpc->dev, "vcc_flsh");
+ if (IS_ERR(dlpc->vcc_flsh))
+ return dev_err_probe(dev, PTR_ERR(dlpc->vcc_flsh),
+ "failed to get VCC_FLSH supply\n");
+
+ dlpc->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);
+ if (IS_ERR(dlpc->next_bridge))
+ return PTR_ERR(dlpc->next_bridge);
+
+ endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0);
+ dlpc->dsi_lanes = of_property_count_u32_elems(endpoint, "data-lanes");
+ if (dlpc->dsi_lanes < 0 || dlpc->dsi_lanes > 4) {
+ ret = -EINVAL;
+ goto err_put_endpoint;
+ }
+
+ dlpc->host_node = of_graph_get_remote_port_parent(endpoint);
+ if (!dlpc->host_node) {
+ ret = -ENODEV;
+ goto err_put_host;
+ }
+
+ of_node_put(endpoint);
+
+ return 0;
+
+err_put_host:
+ of_node_put(dlpc->host_node);
+err_put_endpoint:
+ of_node_put(endpoint);
+ return ret;
+}
+
+static int dlpc_host_attach(struct dlpc *dlpc)
+{
+ struct device *dev = dlpc->dev;
+ struct mipi_dsi_host *host;
+ struct mipi_dsi_device_info info = {
+ .type = "dlpc3433",
+ .channel = 0,
+ .node = NULL,
+ };
+
+ host = of_find_mipi_dsi_host_by_node(dlpc->host_node);
+ if (!host) {
+ DRM_DEV_ERROR(dev, "failed to find dsi host\n");
+ return -EPROBE_DEFER;
+ }
+
+ dlpc->dsi = mipi_dsi_device_register_full(host, &info);
+ if (IS_ERR(dlpc->dsi)) {
+ DRM_DEV_ERROR(dev, "failed to create dsi device\n");
+ return PTR_ERR(dlpc->dsi);
+ }
+
+ dlpc->dsi->mode_flags = MIPI_DSI_MODE_VIDEO_BURST;
+ dlpc->dsi->format = MIPI_DSI_FMT_RGB565;
+ dlpc->dsi->lanes = dlpc->dsi_lanes;
+
+ return devm_mipi_dsi_attach(dev, dlpc->dsi);
+}
+
+static int dlpc3433_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct dlpc *dlpc;
+ int ret;
+
+ dlpc = devm_kzalloc(dev, sizeof(*dlpc), GFP_KERNEL);
+ if (!dlpc)
+ return -ENOMEM;
+
+ dlpc->dev = dev;
+
+ dlpc->regmap = devm_regmap_init_i2c(client, &dlpc_regmap_config);
+ if (IS_ERR(dlpc->regmap))
+ return PTR_ERR(dlpc->regmap);
+
+ ret = dlpc3433_parse_dt(dlpc);
+ if (ret)
+ return ret;
+
+ dev_set_drvdata(dev, dlpc);
+ i2c_set_clientdata(client, dlpc);
+
+ dlpc->bridge.funcs = &dlpc_bridge_funcs;
+ dlpc->bridge.of_node = dev->of_node;
+ drm_bridge_add(&dlpc->bridge);
+
+ ret = dlpc_host_attach(dlpc);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "failed to attach dsi host\n");
+ goto err_remove_bridge;
+ }
+
+ return 0;
+
+err_remove_bridge:
+ drm_bridge_remove(&dlpc->bridge);
+ return ret;
+}
+
+static void dlpc3433_remove(struct i2c_client *client)
+{
+ struct dlpc *dlpc = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&dlpc->bridge);
+ of_node_put(dlpc->host_node);
+}
+
+static const struct i2c_device_id dlpc3433_id[] = {
+ { "ti,dlpc3433", 0 },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, dlpc3433_id);
+
+static const struct of_device_id dlpc3433_match_table[] = {
+ { .compatible = "ti,dlpc3433" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dlpc3433_match_table);
+
+static struct i2c_driver dlpc3433_driver = {
+ .probe_new = dlpc3433_probe,
+ .remove = dlpc3433_remove,
+ .id_table = dlpc3433_id,
+ .driver = {
+ .name = "ti-dlpc3433",
+ .of_match_table = dlpc3433_match_table,
+ },
+};
+module_i2c_driver(dlpc3433_driver);
+
+MODULE_AUTHOR("Jagan Teki <jagan@amarulasolutions.com>");
+MODULE_AUTHOR("Christopher Vollo <chris@renewoutreach.org>");
+MODULE_DESCRIPTION("TI DLPC3433 MIPI DSI Display Controller Bridge");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
new file mode 100644
index 000000000..3f43b4414
--- /dev/null
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
@@ -0,0 +1,761 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * TI SN65DSI83,84,85 driver
+ *
+ * Currently supported:
+ * - SN65DSI83
+ * = 1x Single-link DSI ~ 1x Single-link LVDS
+ * - Supported
+ * - Single-link LVDS mode tested
+ * - SN65DSI84
+ * = 1x Single-link DSI ~ 2x Single-link or 1x Dual-link LVDS
+ * - Supported
+ * - Dual-link LVDS mode tested
+ * - 2x Single-link LVDS mode unsupported
+ * (should be easy to add by someone who has the HW)
+ * - SN65DSI85
+ * = 2x Single-link or 1x Dual-link DSI ~ 2x Single-link or 1x Dual-link LVDS
+ * - Unsupported
+ * (should be easy to add by someone who has the HW)
+ *
+ * Copyright (C) 2021 Marek Vasut <marex@denx.de>
+ *
+ * Based on previous work of:
+ * Valentin Raevsky <valentin@compulab.co.il>
+ * Philippe Schenker <philippe.schenker@toradex.com>
+ */
+
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+/* ID registers */
+#define REG_ID(n) (0x00 + (n))
+/* Reset and clock registers */
+#define REG_RC_RESET 0x09
+#define REG_RC_RESET_SOFT_RESET BIT(0)
+#define REG_RC_LVDS_PLL 0x0a
+#define REG_RC_LVDS_PLL_PLL_EN_STAT BIT(7)
+#define REG_RC_LVDS_PLL_LVDS_CLK_RANGE(n) (((n) & 0x7) << 1)
+#define REG_RC_LVDS_PLL_HS_CLK_SRC_DPHY BIT(0)
+#define REG_RC_DSI_CLK 0x0b
+#define REG_RC_DSI_CLK_DSI_CLK_DIVIDER(n) (((n) & 0x1f) << 3)
+#define REG_RC_DSI_CLK_REFCLK_MULTIPLIER(n) ((n) & 0x3)
+#define REG_RC_PLL_EN 0x0d
+#define REG_RC_PLL_EN_PLL_EN BIT(0)
+/* DSI registers */
+#define REG_DSI_LANE 0x10
+#define REG_DSI_LANE_LEFT_RIGHT_PIXELS BIT(7) /* DSI85-only */
+#define REG_DSI_LANE_DSI_CHANNEL_MODE_DUAL 0 /* DSI85-only */
+#define REG_DSI_LANE_DSI_CHANNEL_MODE_2SINGLE BIT(6) /* DSI85-only */
+#define REG_DSI_LANE_DSI_CHANNEL_MODE_SINGLE BIT(5)
+#define REG_DSI_LANE_CHA_DSI_LANES(n) (((n) & 0x3) << 3)
+#define REG_DSI_LANE_CHB_DSI_LANES(n) (((n) & 0x3) << 1)
+#define REG_DSI_LANE_SOT_ERR_TOL_DIS BIT(0)
+#define REG_DSI_EQ 0x11
+#define REG_DSI_EQ_CHA_DSI_DATA_EQ(n) (((n) & 0x3) << 6)
+#define REG_DSI_EQ_CHA_DSI_CLK_EQ(n) (((n) & 0x3) << 2)
+#define REG_DSI_CLK 0x12
+#define REG_DSI_CLK_CHA_DSI_CLK_RANGE(n) ((n) & 0xff)
+/* LVDS registers */
+#define REG_LVDS_FMT 0x18
+#define REG_LVDS_FMT_DE_NEG_POLARITY BIT(7)
+#define REG_LVDS_FMT_HS_NEG_POLARITY BIT(6)
+#define REG_LVDS_FMT_VS_NEG_POLARITY BIT(5)
+#define REG_LVDS_FMT_LVDS_LINK_CFG BIT(4) /* 0:AB 1:A-only */
+#define REG_LVDS_FMT_CHA_24BPP_MODE BIT(3)
+#define REG_LVDS_FMT_CHB_24BPP_MODE BIT(2)
+#define REG_LVDS_FMT_CHA_24BPP_FORMAT1 BIT(1)
+#define REG_LVDS_FMT_CHB_24BPP_FORMAT1 BIT(0)
+#define REG_LVDS_VCOM 0x19
+#define REG_LVDS_VCOM_CHA_LVDS_VOCM BIT(6)
+#define REG_LVDS_VCOM_CHB_LVDS_VOCM BIT(4)
+#define REG_LVDS_VCOM_CHA_LVDS_VOD_SWING(n) (((n) & 0x3) << 2)
+#define REG_LVDS_VCOM_CHB_LVDS_VOD_SWING(n) ((n) & 0x3)
+#define REG_LVDS_LANE 0x1a
+#define REG_LVDS_LANE_EVEN_ODD_SWAP BIT(6)
+#define REG_LVDS_LANE_CHA_REVERSE_LVDS BIT(5)
+#define REG_LVDS_LANE_CHB_REVERSE_LVDS BIT(4)
+#define REG_LVDS_LANE_CHA_LVDS_TERM BIT(1)
+#define REG_LVDS_LANE_CHB_LVDS_TERM BIT(0)
+#define REG_LVDS_CM 0x1b
+#define REG_LVDS_CM_CHA_LVDS_CM_ADJUST(n) (((n) & 0x3) << 4)
+#define REG_LVDS_CM_CHB_LVDS_CM_ADJUST(n) ((n) & 0x3)
+/* Video registers */
+#define REG_VID_CHA_ACTIVE_LINE_LENGTH_LOW 0x20
+#define REG_VID_CHA_ACTIVE_LINE_LENGTH_HIGH 0x21
+#define REG_VID_CHA_VERTICAL_DISPLAY_SIZE_LOW 0x24
+#define REG_VID_CHA_VERTICAL_DISPLAY_SIZE_HIGH 0x25
+#define REG_VID_CHA_SYNC_DELAY_LOW 0x28
+#define REG_VID_CHA_SYNC_DELAY_HIGH 0x29
+#define REG_VID_CHA_HSYNC_PULSE_WIDTH_LOW 0x2c
+#define REG_VID_CHA_HSYNC_PULSE_WIDTH_HIGH 0x2d
+#define REG_VID_CHA_VSYNC_PULSE_WIDTH_LOW 0x30
+#define REG_VID_CHA_VSYNC_PULSE_WIDTH_HIGH 0x31
+#define REG_VID_CHA_HORIZONTAL_BACK_PORCH 0x34
+#define REG_VID_CHA_VERTICAL_BACK_PORCH 0x36
+#define REG_VID_CHA_HORIZONTAL_FRONT_PORCH 0x38
+#define REG_VID_CHA_VERTICAL_FRONT_PORCH 0x3a
+#define REG_VID_CHA_TEST_PATTERN 0x3c
+/* IRQ registers */
+#define REG_IRQ_GLOBAL 0xe0
+#define REG_IRQ_GLOBAL_IRQ_EN BIT(0)
+#define REG_IRQ_EN 0xe1
+#define REG_IRQ_EN_CHA_SYNCH_ERR_EN BIT(7)
+#define REG_IRQ_EN_CHA_CRC_ERR_EN BIT(6)
+#define REG_IRQ_EN_CHA_UNC_ECC_ERR_EN BIT(5)
+#define REG_IRQ_EN_CHA_COR_ECC_ERR_EN BIT(4)
+#define REG_IRQ_EN_CHA_LLP_ERR_EN BIT(3)
+#define REG_IRQ_EN_CHA_SOT_BIT_ERR_EN BIT(2)
+#define REG_IRQ_EN_CHA_PLL_UNLOCK_EN BIT(0)
+#define REG_IRQ_STAT 0xe5
+#define REG_IRQ_STAT_CHA_SYNCH_ERR BIT(7)
+#define REG_IRQ_STAT_CHA_CRC_ERR BIT(6)
+#define REG_IRQ_STAT_CHA_UNC_ECC_ERR BIT(5)
+#define REG_IRQ_STAT_CHA_COR_ECC_ERR BIT(4)
+#define REG_IRQ_STAT_CHA_LLP_ERR BIT(3)
+#define REG_IRQ_STAT_CHA_SOT_BIT_ERR BIT(2)
+#define REG_IRQ_STAT_CHA_PLL_UNLOCK BIT(0)
+
+enum sn65dsi83_model {
+ MODEL_SN65DSI83,
+ MODEL_SN65DSI84,
+};
+
+struct sn65dsi83 {
+ struct drm_bridge bridge;
+ struct device *dev;
+ struct regmap *regmap;
+ struct mipi_dsi_device *dsi;
+ struct drm_bridge *panel_bridge;
+ struct gpio_desc *enable_gpio;
+ struct regulator *vcc;
+ bool lvds_dual_link;
+ bool lvds_dual_link_even_odd_swap;
+};
+
+static const struct regmap_range sn65dsi83_readable_ranges[] = {
+ regmap_reg_range(REG_ID(0), REG_ID(8)),
+ regmap_reg_range(REG_RC_LVDS_PLL, REG_RC_DSI_CLK),
+ regmap_reg_range(REG_RC_PLL_EN, REG_RC_PLL_EN),
+ regmap_reg_range(REG_DSI_LANE, REG_DSI_CLK),
+ regmap_reg_range(REG_LVDS_FMT, REG_LVDS_CM),
+ regmap_reg_range(REG_VID_CHA_ACTIVE_LINE_LENGTH_LOW,
+ REG_VID_CHA_ACTIVE_LINE_LENGTH_HIGH),
+ regmap_reg_range(REG_VID_CHA_VERTICAL_DISPLAY_SIZE_LOW,
+ REG_VID_CHA_VERTICAL_DISPLAY_SIZE_HIGH),
+ regmap_reg_range(REG_VID_CHA_SYNC_DELAY_LOW,
+ REG_VID_CHA_SYNC_DELAY_HIGH),
+ regmap_reg_range(REG_VID_CHA_HSYNC_PULSE_WIDTH_LOW,
+ REG_VID_CHA_HSYNC_PULSE_WIDTH_HIGH),
+ regmap_reg_range(REG_VID_CHA_VSYNC_PULSE_WIDTH_LOW,
+ REG_VID_CHA_VSYNC_PULSE_WIDTH_HIGH),
+ regmap_reg_range(REG_VID_CHA_HORIZONTAL_BACK_PORCH,
+ REG_VID_CHA_HORIZONTAL_BACK_PORCH),
+ regmap_reg_range(REG_VID_CHA_VERTICAL_BACK_PORCH,
+ REG_VID_CHA_VERTICAL_BACK_PORCH),
+ regmap_reg_range(REG_VID_CHA_HORIZONTAL_FRONT_PORCH,
+ REG_VID_CHA_HORIZONTAL_FRONT_PORCH),
+ regmap_reg_range(REG_VID_CHA_VERTICAL_FRONT_PORCH,
+ REG_VID_CHA_VERTICAL_FRONT_PORCH),
+ regmap_reg_range(REG_VID_CHA_TEST_PATTERN, REG_VID_CHA_TEST_PATTERN),
+ regmap_reg_range(REG_IRQ_GLOBAL, REG_IRQ_EN),
+ regmap_reg_range(REG_IRQ_STAT, REG_IRQ_STAT),
+};
+
+static const struct regmap_access_table sn65dsi83_readable_table = {
+ .yes_ranges = sn65dsi83_readable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(sn65dsi83_readable_ranges),
+};
+
+static const struct regmap_range sn65dsi83_writeable_ranges[] = {
+ regmap_reg_range(REG_RC_RESET, REG_RC_DSI_CLK),
+ regmap_reg_range(REG_RC_PLL_EN, REG_RC_PLL_EN),
+ regmap_reg_range(REG_DSI_LANE, REG_DSI_CLK),
+ regmap_reg_range(REG_LVDS_FMT, REG_LVDS_CM),
+ regmap_reg_range(REG_VID_CHA_ACTIVE_LINE_LENGTH_LOW,
+ REG_VID_CHA_ACTIVE_LINE_LENGTH_HIGH),
+ regmap_reg_range(REG_VID_CHA_VERTICAL_DISPLAY_SIZE_LOW,
+ REG_VID_CHA_VERTICAL_DISPLAY_SIZE_HIGH),
+ regmap_reg_range(REG_VID_CHA_SYNC_DELAY_LOW,
+ REG_VID_CHA_SYNC_DELAY_HIGH),
+ regmap_reg_range(REG_VID_CHA_HSYNC_PULSE_WIDTH_LOW,
+ REG_VID_CHA_HSYNC_PULSE_WIDTH_HIGH),
+ regmap_reg_range(REG_VID_CHA_VSYNC_PULSE_WIDTH_LOW,
+ REG_VID_CHA_VSYNC_PULSE_WIDTH_HIGH),
+ regmap_reg_range(REG_VID_CHA_HORIZONTAL_BACK_PORCH,
+ REG_VID_CHA_HORIZONTAL_BACK_PORCH),
+ regmap_reg_range(REG_VID_CHA_VERTICAL_BACK_PORCH,
+ REG_VID_CHA_VERTICAL_BACK_PORCH),
+ regmap_reg_range(REG_VID_CHA_HORIZONTAL_FRONT_PORCH,
+ REG_VID_CHA_HORIZONTAL_FRONT_PORCH),
+ regmap_reg_range(REG_VID_CHA_VERTICAL_FRONT_PORCH,
+ REG_VID_CHA_VERTICAL_FRONT_PORCH),
+ regmap_reg_range(REG_VID_CHA_TEST_PATTERN, REG_VID_CHA_TEST_PATTERN),
+ regmap_reg_range(REG_IRQ_GLOBAL, REG_IRQ_EN),
+ regmap_reg_range(REG_IRQ_STAT, REG_IRQ_STAT),
+};
+
+static const struct regmap_access_table sn65dsi83_writeable_table = {
+ .yes_ranges = sn65dsi83_writeable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(sn65dsi83_writeable_ranges),
+};
+
+static const struct regmap_range sn65dsi83_volatile_ranges[] = {
+ regmap_reg_range(REG_RC_RESET, REG_RC_RESET),
+ regmap_reg_range(REG_RC_LVDS_PLL, REG_RC_LVDS_PLL),
+ regmap_reg_range(REG_IRQ_STAT, REG_IRQ_STAT),
+};
+
+static const struct regmap_access_table sn65dsi83_volatile_table = {
+ .yes_ranges = sn65dsi83_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(sn65dsi83_volatile_ranges),
+};
+
+static const struct regmap_config sn65dsi83_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .rd_table = &sn65dsi83_readable_table,
+ .wr_table = &sn65dsi83_writeable_table,
+ .volatile_table = &sn65dsi83_volatile_table,
+ .cache_type = REGCACHE_RBTREE,
+ .max_register = REG_IRQ_STAT,
+};
+
+static struct sn65dsi83 *bridge_to_sn65dsi83(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct sn65dsi83, bridge);
+}
+
+static int sn65dsi83_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct sn65dsi83 *ctx = bridge_to_sn65dsi83(bridge);
+
+ return drm_bridge_attach(bridge->encoder, ctx->panel_bridge,
+ &ctx->bridge, flags);
+}
+
+static void sn65dsi83_detach(struct drm_bridge *bridge)
+{
+ struct sn65dsi83 *ctx = bridge_to_sn65dsi83(bridge);
+
+ if (!ctx->dsi)
+ return;
+
+ ctx->dsi = NULL;
+}
+
+static u8 sn65dsi83_get_lvds_range(struct sn65dsi83 *ctx,
+ const struct drm_display_mode *mode)
+{
+ /*
+ * The encoding of the LVDS_CLK_RANGE is as follows:
+ * 000 - 25 MHz <= LVDS_CLK < 37.5 MHz
+ * 001 - 37.5 MHz <= LVDS_CLK < 62.5 MHz
+ * 010 - 62.5 MHz <= LVDS_CLK < 87.5 MHz
+ * 011 - 87.5 MHz <= LVDS_CLK < 112.5 MHz
+ * 100 - 112.5 MHz <= LVDS_CLK < 137.5 MHz
+ * 101 - 137.5 MHz <= LVDS_CLK <= 154 MHz
+ * which is a range of 12.5MHz..162.5MHz in 50MHz steps, except that
+ * the ends of the ranges are clamped to the supported range. Since
+ * sn65dsi83_mode_valid() already filters the valid modes and limits
+ * the clock to 25..154 MHz, the range calculation can be simplified
+ * as follows:
+ */
+ int mode_clock = mode->clock;
+
+ if (ctx->lvds_dual_link)
+ mode_clock /= 2;
+
+ return (mode_clock - 12500) / 25000;
+}
+
+static u8 sn65dsi83_get_dsi_range(struct sn65dsi83 *ctx,
+ const struct drm_display_mode *mode)
+{
+ /*
+ * The encoding of the CHA_DSI_CLK_RANGE is as follows:
+ * 0x00 through 0x07 - Reserved
+ * 0x08 - 40 <= DSI_CLK < 45 MHz
+ * 0x09 - 45 <= DSI_CLK < 50 MHz
+ * ...
+ * 0x63 - 495 <= DSI_CLK < 500 MHz
+ * 0x64 - 500 MHz
+ * 0x65 through 0xFF - Reserved
+ * which is DSI clock in 5 MHz steps, clamped to 40..500 MHz.
+ * The DSI clock are calculated as:
+ * DSI_CLK = mode clock * bpp / dsi_data_lanes / 2
+ * the 2 is there because the bus is DDR.
+ */
+ return DIV_ROUND_UP(clamp((unsigned int)mode->clock *
+ mipi_dsi_pixel_format_to_bpp(ctx->dsi->format) /
+ ctx->dsi->lanes / 2, 40000U, 500000U), 5000U);
+}
+
+static u8 sn65dsi83_get_dsi_div(struct sn65dsi83 *ctx)
+{
+ /* The divider is (DSI_CLK / LVDS_CLK) - 1, which really is: */
+ unsigned int dsi_div = mipi_dsi_pixel_format_to_bpp(ctx->dsi->format);
+
+ dsi_div /= ctx->dsi->lanes;
+
+ if (!ctx->lvds_dual_link)
+ dsi_div /= 2;
+
+ return dsi_div - 1;
+}
+
+static void sn65dsi83_atomic_pre_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct sn65dsi83 *ctx = bridge_to_sn65dsi83(bridge);
+ struct drm_atomic_state *state = old_bridge_state->base.state;
+ const struct drm_bridge_state *bridge_state;
+ const struct drm_crtc_state *crtc_state;
+ const struct drm_display_mode *mode;
+ struct drm_connector *connector;
+ struct drm_crtc *crtc;
+ bool lvds_format_24bpp;
+ bool lvds_format_jeida;
+ unsigned int pval;
+ __le16 le16val;
+ u16 val;
+ int ret;
+
+ ret = regulator_enable(ctx->vcc);
+ if (ret) {
+ dev_err(ctx->dev, "Failed to enable vcc: %d\n", ret);
+ return;
+ }
+
+ /* Deassert reset */
+ gpiod_set_value_cansleep(ctx->enable_gpio, 1);
+ usleep_range(10000, 11000);
+
+ /* Get the LVDS format from the bridge state. */
+ bridge_state = drm_atomic_get_new_bridge_state(state, bridge);
+
+ switch (bridge_state->output_bus_cfg.format) {
+ case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
+ lvds_format_24bpp = false;
+ lvds_format_jeida = true;
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
+ lvds_format_24bpp = true;
+ lvds_format_jeida = true;
+ break;
+ case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
+ lvds_format_24bpp = true;
+ lvds_format_jeida = false;
+ break;
+ default:
+ /*
+ * Some bridges still don't set the correct
+ * LVDS bus pixel format, use SPWG24 default
+ * format until those are fixed.
+ */
+ lvds_format_24bpp = true;
+ lvds_format_jeida = false;
+ dev_warn(ctx->dev,
+ "Unsupported LVDS bus format 0x%04x, please check output bridge driver. Falling back to SPWG24.\n",
+ bridge_state->output_bus_cfg.format);
+ break;
+ }
+
+ /*
+ * Retrieve the CRTC adjusted mode. This requires a little dance to go
+ * from the bridge to the encoder, to the connector and to the CRTC.
+ */
+ connector = drm_atomic_get_new_connector_for_encoder(state,
+ bridge->encoder);
+ crtc = drm_atomic_get_new_connector_state(state, connector)->crtc;
+ crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+ mode = &crtc_state->adjusted_mode;
+
+ /* Clear reset, disable PLL */
+ regmap_write(ctx->regmap, REG_RC_RESET, 0x00);
+ regmap_write(ctx->regmap, REG_RC_PLL_EN, 0x00);
+
+ /* Reference clock derived from DSI link clock. */
+ regmap_write(ctx->regmap, REG_RC_LVDS_PLL,
+ REG_RC_LVDS_PLL_LVDS_CLK_RANGE(sn65dsi83_get_lvds_range(ctx, mode)) |
+ REG_RC_LVDS_PLL_HS_CLK_SRC_DPHY);
+ regmap_write(ctx->regmap, REG_DSI_CLK,
+ REG_DSI_CLK_CHA_DSI_CLK_RANGE(sn65dsi83_get_dsi_range(ctx, mode)));
+ regmap_write(ctx->regmap, REG_RC_DSI_CLK,
+ REG_RC_DSI_CLK_DSI_CLK_DIVIDER(sn65dsi83_get_dsi_div(ctx)));
+
+ /* Set number of DSI lanes and LVDS link config. */
+ regmap_write(ctx->regmap, REG_DSI_LANE,
+ REG_DSI_LANE_DSI_CHANNEL_MODE_SINGLE |
+ REG_DSI_LANE_CHA_DSI_LANES(~(ctx->dsi->lanes - 1)) |
+ /* CHB is DSI85-only, set to default on DSI83/DSI84 */
+ REG_DSI_LANE_CHB_DSI_LANES(3));
+ /* No equalization. */
+ regmap_write(ctx->regmap, REG_DSI_EQ, 0x00);
+
+ /* Set up sync signal polarity. */
+ val = (mode->flags & DRM_MODE_FLAG_NHSYNC ?
+ REG_LVDS_FMT_HS_NEG_POLARITY : 0) |
+ (mode->flags & DRM_MODE_FLAG_NVSYNC ?
+ REG_LVDS_FMT_VS_NEG_POLARITY : 0);
+
+ /* Set up bits-per-pixel, 18bpp or 24bpp. */
+ if (lvds_format_24bpp) {
+ val |= REG_LVDS_FMT_CHA_24BPP_MODE;
+ if (ctx->lvds_dual_link)
+ val |= REG_LVDS_FMT_CHB_24BPP_MODE;
+ }
+
+ /* Set up LVDS format, JEIDA/Format 1 or SPWG/Format 2 */
+ if (lvds_format_jeida) {
+ val |= REG_LVDS_FMT_CHA_24BPP_FORMAT1;
+ if (ctx->lvds_dual_link)
+ val |= REG_LVDS_FMT_CHB_24BPP_FORMAT1;
+ }
+
+ /* Set up LVDS output config (DSI84,DSI85) */
+ if (!ctx->lvds_dual_link)
+ val |= REG_LVDS_FMT_LVDS_LINK_CFG;
+
+ regmap_write(ctx->regmap, REG_LVDS_FMT, val);
+ regmap_write(ctx->regmap, REG_LVDS_VCOM, 0x05);
+ regmap_write(ctx->regmap, REG_LVDS_LANE,
+ (ctx->lvds_dual_link_even_odd_swap ?
+ REG_LVDS_LANE_EVEN_ODD_SWAP : 0) |
+ REG_LVDS_LANE_CHA_LVDS_TERM |
+ REG_LVDS_LANE_CHB_LVDS_TERM);
+ regmap_write(ctx->regmap, REG_LVDS_CM, 0x00);
+
+ le16val = cpu_to_le16(mode->hdisplay);
+ regmap_bulk_write(ctx->regmap, REG_VID_CHA_ACTIVE_LINE_LENGTH_LOW,
+ &le16val, 2);
+ le16val = cpu_to_le16(mode->vdisplay);
+ regmap_bulk_write(ctx->regmap, REG_VID_CHA_VERTICAL_DISPLAY_SIZE_LOW,
+ &le16val, 2);
+ /* 32 + 1 pixel clock to ensure proper operation */
+ le16val = cpu_to_le16(32 + 1);
+ regmap_bulk_write(ctx->regmap, REG_VID_CHA_SYNC_DELAY_LOW, &le16val, 2);
+ le16val = cpu_to_le16(mode->hsync_end - mode->hsync_start);
+ regmap_bulk_write(ctx->regmap, REG_VID_CHA_HSYNC_PULSE_WIDTH_LOW,
+ &le16val, 2);
+ le16val = cpu_to_le16(mode->vsync_end - mode->vsync_start);
+ regmap_bulk_write(ctx->regmap, REG_VID_CHA_VSYNC_PULSE_WIDTH_LOW,
+ &le16val, 2);
+ regmap_write(ctx->regmap, REG_VID_CHA_HORIZONTAL_BACK_PORCH,
+ mode->htotal - mode->hsync_end);
+ regmap_write(ctx->regmap, REG_VID_CHA_VERTICAL_BACK_PORCH,
+ mode->vtotal - mode->vsync_end);
+ regmap_write(ctx->regmap, REG_VID_CHA_HORIZONTAL_FRONT_PORCH,
+ mode->hsync_start - mode->hdisplay);
+ regmap_write(ctx->regmap, REG_VID_CHA_VERTICAL_FRONT_PORCH,
+ mode->vsync_start - mode->vdisplay);
+ regmap_write(ctx->regmap, REG_VID_CHA_TEST_PATTERN, 0x00);
+
+ /* Enable PLL */
+ regmap_write(ctx->regmap, REG_RC_PLL_EN, REG_RC_PLL_EN_PLL_EN);
+ usleep_range(3000, 4000);
+ ret = regmap_read_poll_timeout(ctx->regmap, REG_RC_LVDS_PLL, pval,
+ pval & REG_RC_LVDS_PLL_PLL_EN_STAT,
+ 1000, 100000);
+ if (ret) {
+ dev_err(ctx->dev, "failed to lock PLL, ret=%i\n", ret);
+ /* On failure, disable PLL again and exit. */
+ regmap_write(ctx->regmap, REG_RC_PLL_EN, 0x00);
+ regulator_disable(ctx->vcc);
+ return;
+ }
+
+ /* Trigger reset after CSR register update. */
+ regmap_write(ctx->regmap, REG_RC_RESET, REG_RC_RESET_SOFT_RESET);
+
+ /* Wait for 10ms after soft reset as specified in datasheet */
+ usleep_range(10000, 12000);
+}
+
+static void sn65dsi83_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct sn65dsi83 *ctx = bridge_to_sn65dsi83(bridge);
+ unsigned int pval;
+
+ /* Clear all errors that got asserted during initialization. */
+ regmap_read(ctx->regmap, REG_IRQ_STAT, &pval);
+ regmap_write(ctx->regmap, REG_IRQ_STAT, pval);
+
+ /* Wait for 1ms and check for errors in status register */
+ usleep_range(1000, 1100);
+ regmap_read(ctx->regmap, REG_IRQ_STAT, &pval);
+ if (pval)
+ dev_err(ctx->dev, "Unexpected link status 0x%02x\n", pval);
+}
+
+static void sn65dsi83_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct sn65dsi83 *ctx = bridge_to_sn65dsi83(bridge);
+ int ret;
+
+ /* Put the chip in reset, pull EN line low, and assure 10ms reset low timing. */
+ gpiod_set_value_cansleep(ctx->enable_gpio, 0);
+ usleep_range(10000, 11000);
+
+ ret = regulator_disable(ctx->vcc);
+ if (ret)
+ dev_err(ctx->dev, "Failed to disable vcc: %d\n", ret);
+
+ regcache_mark_dirty(ctx->regmap);
+}
+
+static enum drm_mode_status
+sn65dsi83_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ /* LVDS output clock range 25..154 MHz */
+ if (mode->clock < 25000)
+ return MODE_CLOCK_LOW;
+ if (mode->clock > 154000)
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
+}
+
+#define MAX_INPUT_SEL_FORMATS 1
+
+static u32 *
+sn65dsi83_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ u32 *input_fmts;
+
+ *num_input_fmts = 0;
+
+ input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
+ GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ /* This is the DSI-end bus format */
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
+ *num_input_fmts = 1;
+
+ return input_fmts;
+}
+
+static const struct drm_bridge_funcs sn65dsi83_funcs = {
+ .attach = sn65dsi83_attach,
+ .detach = sn65dsi83_detach,
+ .atomic_enable = sn65dsi83_atomic_enable,
+ .atomic_pre_enable = sn65dsi83_atomic_pre_enable,
+ .atomic_disable = sn65dsi83_atomic_disable,
+ .mode_valid = sn65dsi83_mode_valid,
+
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .atomic_get_input_bus_fmts = sn65dsi83_atomic_get_input_bus_fmts,
+};
+
+static int sn65dsi83_parse_dt(struct sn65dsi83 *ctx, enum sn65dsi83_model model)
+{
+ struct drm_bridge *panel_bridge;
+ struct device *dev = ctx->dev;
+
+ ctx->lvds_dual_link = false;
+ ctx->lvds_dual_link_even_odd_swap = false;
+ if (model != MODEL_SN65DSI83) {
+ struct device_node *port2, *port3;
+ int dual_link;
+
+ port2 = of_graph_get_port_by_id(dev->of_node, 2);
+ port3 = of_graph_get_port_by_id(dev->of_node, 3);
+ dual_link = drm_of_lvds_get_dual_link_pixel_order(port2, port3);
+ of_node_put(port2);
+ of_node_put(port3);
+
+ if (dual_link == DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS) {
+ ctx->lvds_dual_link = true;
+ /* Odd pixels to LVDS Channel A, even pixels to B */
+ ctx->lvds_dual_link_even_odd_swap = false;
+ } else if (dual_link == DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS) {
+ ctx->lvds_dual_link = true;
+ /* Even pixels to LVDS Channel A, odd pixels to B */
+ ctx->lvds_dual_link_even_odd_swap = true;
+ }
+ }
+
+ panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 2, 0);
+ if (IS_ERR(panel_bridge))
+ return PTR_ERR(panel_bridge);
+
+ ctx->panel_bridge = panel_bridge;
+
+ ctx->vcc = devm_regulator_get(dev, "vcc");
+ if (IS_ERR(ctx->vcc))
+ return dev_err_probe(dev, PTR_ERR(ctx->vcc),
+ "Failed to get supply 'vcc'\n");
+
+ return 0;
+}
+
+static int sn65dsi83_host_attach(struct sn65dsi83 *ctx)
+{
+ struct device *dev = ctx->dev;
+ struct device_node *host_node;
+ struct device_node *endpoint;
+ struct mipi_dsi_device *dsi;
+ struct mipi_dsi_host *host;
+ const struct mipi_dsi_device_info info = {
+ .type = "sn65dsi83",
+ .channel = 0,
+ .node = NULL,
+ };
+ int dsi_lanes, ret;
+
+ endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
+ dsi_lanes = drm_of_get_data_lanes_count(endpoint, 1, 4);
+ host_node = of_graph_get_remote_port_parent(endpoint);
+ host = of_find_mipi_dsi_host_by_node(host_node);
+ of_node_put(host_node);
+ of_node_put(endpoint);
+
+ if (!host)
+ return -EPROBE_DEFER;
+
+ if (dsi_lanes < 0)
+ return dsi_lanes;
+
+ dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
+ if (IS_ERR(dsi))
+ return dev_err_probe(dev, PTR_ERR(dsi),
+ "failed to create dsi device\n");
+
+ ctx->dsi = dsi;
+
+ dsi->lanes = dsi_lanes;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
+ MIPI_DSI_MODE_VIDEO_NO_HFP | MIPI_DSI_MODE_VIDEO_NO_HBP |
+ MIPI_DSI_MODE_VIDEO_NO_HSA | MIPI_DSI_MODE_NO_EOT_PACKET;
+
+ ret = devm_mipi_dsi_attach(dev, dsi);
+ if (ret < 0) {
+ dev_err(dev, "failed to attach dsi to host: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int sn65dsi83_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ enum sn65dsi83_model model;
+ struct sn65dsi83 *ctx;
+ int ret;
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->dev = dev;
+
+ if (dev->of_node) {
+ model = (enum sn65dsi83_model)(uintptr_t)
+ of_device_get_match_data(dev);
+ } else {
+ model = id->driver_data;
+ }
+
+ /* Put the chip in reset, pull EN line low, and assure 10ms reset low timing. */
+ ctx->enable_gpio = devm_gpiod_get_optional(ctx->dev, "enable",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(ctx->enable_gpio))
+ return dev_err_probe(dev, PTR_ERR(ctx->enable_gpio), "failed to get enable GPIO\n");
+
+ usleep_range(10000, 11000);
+
+ ret = sn65dsi83_parse_dt(ctx, model);
+ if (ret)
+ return ret;
+
+ ctx->regmap = devm_regmap_init_i2c(client, &sn65dsi83_regmap_config);
+ if (IS_ERR(ctx->regmap))
+ return dev_err_probe(dev, PTR_ERR(ctx->regmap), "failed to get regmap\n");
+
+ dev_set_drvdata(dev, ctx);
+ i2c_set_clientdata(client, ctx);
+
+ ctx->bridge.funcs = &sn65dsi83_funcs;
+ ctx->bridge.of_node = dev->of_node;
+ ctx->bridge.pre_enable_prev_first = true;
+ drm_bridge_add(&ctx->bridge);
+
+ ret = sn65dsi83_host_attach(ctx);
+ if (ret)
+ goto err_remove_bridge;
+
+ return 0;
+
+err_remove_bridge:
+ drm_bridge_remove(&ctx->bridge);
+ return ret;
+}
+
+static void sn65dsi83_remove(struct i2c_client *client)
+{
+ struct sn65dsi83 *ctx = i2c_get_clientdata(client);
+
+ drm_bridge_remove(&ctx->bridge);
+}
+
+static struct i2c_device_id sn65dsi83_id[] = {
+ { "ti,sn65dsi83", MODEL_SN65DSI83 },
+ { "ti,sn65dsi84", MODEL_SN65DSI84 },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, sn65dsi83_id);
+
+static const struct of_device_id sn65dsi83_match_table[] = {
+ { .compatible = "ti,sn65dsi83", .data = (void *)MODEL_SN65DSI83 },
+ { .compatible = "ti,sn65dsi84", .data = (void *)MODEL_SN65DSI84 },
+ {},
+};
+MODULE_DEVICE_TABLE(of, sn65dsi83_match_table);
+
+static struct i2c_driver sn65dsi83_driver = {
+ .probe = sn65dsi83_probe,
+ .remove = sn65dsi83_remove,
+ .id_table = sn65dsi83_id,
+ .driver = {
+ .name = "sn65dsi83",
+ .of_match_table = sn65dsi83_match_table,
+ },
+};
+module_i2c_driver(sn65dsi83_driver);
+
+MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
+MODULE_DESCRIPTION("TI SN65DSI83 DSI to LVDS bridge driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
new file mode 100644
index 000000000..ff4d05641
--- /dev/null
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -0,0 +1,2025 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ * datasheet: https://www.ti.com/lit/ds/symlink/sn65dsi86.pdf
+ */
+
+#include <linux/atomic.h>
+#include <linux/auxiliary_bus.h>
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/debugfs.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/driver.h>
+#include <linux/i2c.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of_graph.h>
+#include <linux/pm_runtime.h>
+#include <linux/pwm.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+#include <asm/unaligned.h>
+
+#include <drm/display/drm_dp_aux_bus.h>
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_bridge_connector.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#define SN_DEVICE_REV_REG 0x08
+#define SN_DPPLL_SRC_REG 0x0A
+#define DPPLL_CLK_SRC_DSICLK BIT(0)
+#define REFCLK_FREQ_MASK GENMASK(3, 1)
+#define REFCLK_FREQ(x) ((x) << 1)
+#define DPPLL_SRC_DP_PLL_LOCK BIT(7)
+#define SN_PLL_ENABLE_REG 0x0D
+#define SN_DSI_LANES_REG 0x10
+#define CHA_DSI_LANES_MASK GENMASK(4, 3)
+#define CHA_DSI_LANES(x) ((x) << 3)
+#define SN_DSIA_CLK_FREQ_REG 0x12
+#define SN_CHA_ACTIVE_LINE_LENGTH_LOW_REG 0x20
+#define SN_CHA_VERTICAL_DISPLAY_SIZE_LOW_REG 0x24
+#define SN_CHA_HSYNC_PULSE_WIDTH_LOW_REG 0x2C
+#define SN_CHA_HSYNC_PULSE_WIDTH_HIGH_REG 0x2D
+#define CHA_HSYNC_POLARITY BIT(7)
+#define SN_CHA_VSYNC_PULSE_WIDTH_LOW_REG 0x30
+#define SN_CHA_VSYNC_PULSE_WIDTH_HIGH_REG 0x31
+#define CHA_VSYNC_POLARITY BIT(7)
+#define SN_CHA_HORIZONTAL_BACK_PORCH_REG 0x34
+#define SN_CHA_VERTICAL_BACK_PORCH_REG 0x36
+#define SN_CHA_HORIZONTAL_FRONT_PORCH_REG 0x38
+#define SN_CHA_VERTICAL_FRONT_PORCH_REG 0x3A
+#define SN_LN_ASSIGN_REG 0x59
+#define LN_ASSIGN_WIDTH 2
+#define SN_ENH_FRAME_REG 0x5A
+#define VSTREAM_ENABLE BIT(3)
+#define LN_POLRS_OFFSET 4
+#define LN_POLRS_MASK 0xf0
+#define SN_DATA_FORMAT_REG 0x5B
+#define BPP_18_RGB BIT(0)
+#define SN_HPD_DISABLE_REG 0x5C
+#define HPD_DISABLE BIT(0)
+#define HPD_DEBOUNCED_STATE BIT(4)
+#define SN_GPIO_IO_REG 0x5E
+#define SN_GPIO_INPUT_SHIFT 4
+#define SN_GPIO_OUTPUT_SHIFT 0
+#define SN_GPIO_CTRL_REG 0x5F
+#define SN_GPIO_MUX_INPUT 0
+#define SN_GPIO_MUX_OUTPUT 1
+#define SN_GPIO_MUX_SPECIAL 2
+#define SN_GPIO_MUX_MASK 0x3
+#define SN_AUX_WDATA_REG(x) (0x64 + (x))
+#define SN_AUX_ADDR_19_16_REG 0x74
+#define SN_AUX_ADDR_15_8_REG 0x75
+#define SN_AUX_ADDR_7_0_REG 0x76
+#define SN_AUX_ADDR_MASK GENMASK(19, 0)
+#define SN_AUX_LENGTH_REG 0x77
+#define SN_AUX_CMD_REG 0x78
+#define AUX_CMD_SEND BIT(0)
+#define AUX_CMD_REQ(x) ((x) << 4)
+#define SN_AUX_RDATA_REG(x) (0x79 + (x))
+#define SN_SSC_CONFIG_REG 0x93
+#define DP_NUM_LANES_MASK GENMASK(5, 4)
+#define DP_NUM_LANES(x) ((x) << 4)
+#define SN_DATARATE_CONFIG_REG 0x94
+#define DP_DATARATE_MASK GENMASK(7, 5)
+#define DP_DATARATE(x) ((x) << 5)
+#define SN_TRAINING_SETTING_REG 0x95
+#define SCRAMBLE_DISABLE BIT(4)
+#define SN_ML_TX_MODE_REG 0x96
+#define ML_TX_MAIN_LINK_OFF 0
+#define ML_TX_NORMAL_MODE BIT(0)
+#define SN_PWM_PRE_DIV_REG 0xA0
+#define SN_BACKLIGHT_SCALE_REG 0xA1
+#define BACKLIGHT_SCALE_MAX 0xFFFF
+#define SN_BACKLIGHT_REG 0xA3
+#define SN_PWM_EN_INV_REG 0xA5
+#define SN_PWM_INV_MASK BIT(0)
+#define SN_PWM_EN_MASK BIT(1)
+#define SN_AUX_CMD_STATUS_REG 0xF4
+#define AUX_IRQ_STATUS_AUX_RPLY_TOUT BIT(3)
+#define AUX_IRQ_STATUS_AUX_SHORT BIT(5)
+#define AUX_IRQ_STATUS_NAT_I2C_FAIL BIT(6)
+
+#define MIN_DSI_CLK_FREQ_MHZ 40
+
+/* fudge factor required to account for 8b/10b encoding */
+#define DP_CLK_FUDGE_NUM 10
+#define DP_CLK_FUDGE_DEN 8
+
+/* Matches DP_AUX_MAX_PAYLOAD_BYTES (for now) */
+#define SN_AUX_MAX_PAYLOAD_BYTES 16
+
+#define SN_REGULATOR_SUPPLY_NUM 4
+
+#define SN_MAX_DP_LANES 4
+#define SN_NUM_GPIOS 4
+#define SN_GPIO_PHYSICAL_OFFSET 1
+
+#define SN_LINK_TRAINING_TRIES 10
+
+#define SN_PWM_GPIO_IDX 3 /* 4th GPIO */
+
+/**
+ * struct ti_sn65dsi86 - Platform data for ti-sn65dsi86 driver.
+ * @bridge_aux: AUX-bus sub device for MIPI-to-eDP bridge functionality.
+ * @gpio_aux: AUX-bus sub device for GPIO controller functionality.
+ * @aux_aux: AUX-bus sub device for eDP AUX channel functionality.
+ * @pwm_aux: AUX-bus sub device for PWM controller functionality.
+ *
+ * @dev: Pointer to the top level (i2c) device.
+ * @regmap: Regmap for accessing i2c.
+ * @aux: Our aux channel.
+ * @bridge: Our bridge.
+ * @connector: Our connector.
+ * @host_node: Remote DSI node.
+ * @dsi: Our MIPI DSI source.
+ * @refclk: Our reference clock.
+ * @next_bridge: The bridge on the eDP side.
+ * @enable_gpio: The GPIO we toggle to enable the bridge.
+ * @supplies: Data for bulk enabling/disabling our regulators.
+ * @dp_lanes: Count of dp_lanes we're using.
+ * @ln_assign: Value to program to the LN_ASSIGN register.
+ * @ln_polrs: Value for the 4-bit LN_POLRS field of SN_ENH_FRAME_REG.
+ * @comms_enabled: If true then communication over the aux channel is enabled.
+ * @comms_mutex: Protects modification of comms_enabled.
+ *
+ * @gchip: If we expose our GPIOs, this is used.
+ * @gchip_output: A cache of whether we've set GPIOs to output. This
+ * serves double-duty of keeping track of the direction and
+ * also keeping track of whether we've incremented the
+ * pm_runtime reference count for this pin, which we do
+ * whenever a pin is configured as an output. This is a
+ * bitmap so we can do atomic ops on it without an extra
+ * lock so concurrent users of our 4 GPIOs don't stomp on
+ * each other's read-modify-write.
+ *
+ * @pchip: pwm_chip if the PWM is exposed.
+ * @pwm_enabled: Used to track if the PWM signal is currently enabled.
+ * @pwm_pin_busy: Track if GPIO4 is currently requested for GPIO or PWM.
+ * @pwm_refclk_freq: Cache for the reference clock input to the PWM.
+ */
+struct ti_sn65dsi86 {
+ struct auxiliary_device *bridge_aux;
+ struct auxiliary_device *gpio_aux;
+ struct auxiliary_device *aux_aux;
+ struct auxiliary_device *pwm_aux;
+
+ struct device *dev;
+ struct regmap *regmap;
+ struct drm_dp_aux aux;
+ struct drm_bridge bridge;
+ struct drm_connector *connector;
+ struct device_node *host_node;
+ struct mipi_dsi_device *dsi;
+ struct clk *refclk;
+ struct drm_bridge *next_bridge;
+ struct gpio_desc *enable_gpio;
+ struct regulator_bulk_data supplies[SN_REGULATOR_SUPPLY_NUM];
+ int dp_lanes;
+ u8 ln_assign;
+ u8 ln_polrs;
+ bool comms_enabled;
+ struct mutex comms_mutex;
+
+#if defined(CONFIG_OF_GPIO)
+ struct gpio_chip gchip;
+ DECLARE_BITMAP(gchip_output, SN_NUM_GPIOS);
+#endif
+#if defined(CONFIG_PWM)
+ struct pwm_chip pchip;
+ bool pwm_enabled;
+ atomic_t pwm_pin_busy;
+#endif
+ unsigned int pwm_refclk_freq;
+};
+
+static const struct regmap_range ti_sn65dsi86_volatile_ranges[] = {
+ { .range_min = 0, .range_max = 0xFF },
+};
+
+static const struct regmap_access_table ti_sn_bridge_volatile_table = {
+ .yes_ranges = ti_sn65dsi86_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(ti_sn65dsi86_volatile_ranges),
+};
+
+static const struct regmap_config ti_sn65dsi86_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .volatile_table = &ti_sn_bridge_volatile_table,
+ .cache_type = REGCACHE_NONE,
+ .max_register = 0xFF,
+};
+
+static int __maybe_unused ti_sn65dsi86_read_u16(struct ti_sn65dsi86 *pdata,
+ unsigned int reg, u16 *val)
+{
+ u8 buf[2];
+ int ret;
+
+ ret = regmap_bulk_read(pdata->regmap, reg, buf, ARRAY_SIZE(buf));
+ if (ret)
+ return ret;
+
+ *val = buf[0] | (buf[1] << 8);
+
+ return 0;
+}
+
+static void ti_sn65dsi86_write_u16(struct ti_sn65dsi86 *pdata,
+ unsigned int reg, u16 val)
+{
+ u8 buf[2] = { val & 0xff, val >> 8 };
+
+ regmap_bulk_write(pdata->regmap, reg, buf, ARRAY_SIZE(buf));
+}
+
+static u32 ti_sn_bridge_get_dsi_freq(struct ti_sn65dsi86 *pdata)
+{
+ u32 bit_rate_khz, clk_freq_khz;
+ struct drm_display_mode *mode =
+ &pdata->bridge.encoder->crtc->state->adjusted_mode;
+
+ bit_rate_khz = mode->clock *
+ mipi_dsi_pixel_format_to_bpp(pdata->dsi->format);
+ clk_freq_khz = bit_rate_khz / (pdata->dsi->lanes * 2);
+
+ return clk_freq_khz;
+}
+
+/* clk frequencies supported by bridge in Hz in case derived from REFCLK pin */
+static const u32 ti_sn_bridge_refclk_lut[] = {
+ 12000000,
+ 19200000,
+ 26000000,
+ 27000000,
+ 38400000,
+};
+
+/* clk frequencies supported by bridge in Hz in case derived from DACP/N pin */
+static const u32 ti_sn_bridge_dsiclk_lut[] = {
+ 468000000,
+ 384000000,
+ 416000000,
+ 486000000,
+ 460800000,
+};
+
+static void ti_sn_bridge_set_refclk_freq(struct ti_sn65dsi86 *pdata)
+{
+ int i;
+ u32 refclk_rate;
+ const u32 *refclk_lut;
+ size_t refclk_lut_size;
+
+ if (pdata->refclk) {
+ refclk_rate = clk_get_rate(pdata->refclk);
+ refclk_lut = ti_sn_bridge_refclk_lut;
+ refclk_lut_size = ARRAY_SIZE(ti_sn_bridge_refclk_lut);
+ clk_prepare_enable(pdata->refclk);
+ } else {
+ refclk_rate = ti_sn_bridge_get_dsi_freq(pdata) * 1000;
+ refclk_lut = ti_sn_bridge_dsiclk_lut;
+ refclk_lut_size = ARRAY_SIZE(ti_sn_bridge_dsiclk_lut);
+ }
+
+ /* for i equals to refclk_lut_size means default frequency */
+ for (i = 0; i < refclk_lut_size; i++)
+ if (refclk_lut[i] == refclk_rate)
+ break;
+
+ /* avoid buffer overflow and "1" is the default rate in the datasheet. */
+ if (i >= refclk_lut_size)
+ i = 1;
+
+ regmap_update_bits(pdata->regmap, SN_DPPLL_SRC_REG, REFCLK_FREQ_MASK,
+ REFCLK_FREQ(i));
+
+ /*
+ * The PWM refclk is based on the value written to SN_DPPLL_SRC_REG,
+ * regardless of its actual sourcing.
+ */
+ pdata->pwm_refclk_freq = ti_sn_bridge_refclk_lut[i];
+}
+
+static void ti_sn65dsi86_enable_comms(struct ti_sn65dsi86 *pdata)
+{
+ mutex_lock(&pdata->comms_mutex);
+
+ /* configure bridge ref_clk */
+ ti_sn_bridge_set_refclk_freq(pdata);
+
+ /*
+ * HPD on this bridge chip is a bit useless. This is an eDP bridge
+ * so the HPD is an internal signal that's only there to signal that
+ * the panel is done powering up. ...but the bridge chip debounces
+ * this signal by between 100 ms and 400 ms (depending on process,
+ * voltage, and temperate--I measured it at about 200 ms). One
+ * particular panel asserted HPD 84 ms after it was powered on meaning
+ * that we saw HPD 284 ms after power on. ...but the same panel said
+ * that instead of looking at HPD you could just hardcode a delay of
+ * 200 ms. We'll assume that the panel driver will have the hardcoded
+ * delay in its prepare and always disable HPD.
+ *
+ * If HPD somehow makes sense on some future panel we'll have to
+ * change this to be conditional on someone specifying that HPD should
+ * be used.
+ */
+ regmap_update_bits(pdata->regmap, SN_HPD_DISABLE_REG, HPD_DISABLE,
+ HPD_DISABLE);
+
+ pdata->comms_enabled = true;
+
+ mutex_unlock(&pdata->comms_mutex);
+}
+
+static void ti_sn65dsi86_disable_comms(struct ti_sn65dsi86 *pdata)
+{
+ mutex_lock(&pdata->comms_mutex);
+
+ pdata->comms_enabled = false;
+ clk_disable_unprepare(pdata->refclk);
+
+ mutex_unlock(&pdata->comms_mutex);
+}
+
+static int __maybe_unused ti_sn65dsi86_resume(struct device *dev)
+{
+ struct ti_sn65dsi86 *pdata = dev_get_drvdata(dev);
+ int ret;
+
+ ret = regulator_bulk_enable(SN_REGULATOR_SUPPLY_NUM, pdata->supplies);
+ if (ret) {
+ DRM_ERROR("failed to enable supplies %d\n", ret);
+ return ret;
+ }
+
+ /* td2: min 100 us after regulators before enabling the GPIO */
+ usleep_range(100, 110);
+
+ gpiod_set_value(pdata->enable_gpio, 1);
+
+ /*
+ * If we have a reference clock we can enable communication w/ the
+ * panel (including the aux channel) w/out any need for an input clock
+ * so we can do it in resume which lets us read the EDID before
+ * pre_enable(). Without a reference clock we need the MIPI reference
+ * clock so reading early doesn't work.
+ */
+ if (pdata->refclk)
+ ti_sn65dsi86_enable_comms(pdata);
+
+ return ret;
+}
+
+static int __maybe_unused ti_sn65dsi86_suspend(struct device *dev)
+{
+ struct ti_sn65dsi86 *pdata = dev_get_drvdata(dev);
+ int ret;
+
+ if (pdata->refclk)
+ ti_sn65dsi86_disable_comms(pdata);
+
+ gpiod_set_value(pdata->enable_gpio, 0);
+
+ ret = regulator_bulk_disable(SN_REGULATOR_SUPPLY_NUM, pdata->supplies);
+ if (ret)
+ DRM_ERROR("failed to disable supplies %d\n", ret);
+
+ return ret;
+}
+
+static const struct dev_pm_ops ti_sn65dsi86_pm_ops = {
+ SET_RUNTIME_PM_OPS(ti_sn65dsi86_suspend, ti_sn65dsi86_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+};
+
+static int status_show(struct seq_file *s, void *data)
+{
+ struct ti_sn65dsi86 *pdata = s->private;
+ unsigned int reg, val;
+
+ seq_puts(s, "STATUS REGISTERS:\n");
+
+ pm_runtime_get_sync(pdata->dev);
+
+ /* IRQ Status Registers, see Table 31 in datasheet */
+ for (reg = 0xf0; reg <= 0xf8; reg++) {
+ regmap_read(pdata->regmap, reg, &val);
+ seq_printf(s, "[0x%02x] = 0x%08x\n", reg, val);
+ }
+
+ pm_runtime_put_autosuspend(pdata->dev);
+
+ return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(status);
+
+static void ti_sn65dsi86_debugfs_remove(void *data)
+{
+ debugfs_remove_recursive(data);
+}
+
+static void ti_sn65dsi86_debugfs_init(struct ti_sn65dsi86 *pdata)
+{
+ struct device *dev = pdata->dev;
+ struct dentry *debugfs;
+ int ret;
+
+ debugfs = debugfs_create_dir(dev_name(dev), NULL);
+
+ /*
+ * We might get an error back if debugfs wasn't enabled in the kernel
+ * so let's just silently return upon failure.
+ */
+ if (IS_ERR_OR_NULL(debugfs))
+ return;
+
+ ret = devm_add_action_or_reset(dev, ti_sn65dsi86_debugfs_remove, debugfs);
+ if (ret)
+ return;
+
+ debugfs_create_file("status", 0600, debugfs, pdata, &status_fops);
+}
+
+/* -----------------------------------------------------------------------------
+ * Auxiliary Devices (*not* AUX)
+ */
+
+static void ti_sn65dsi86_uninit_aux(void *data)
+{
+ auxiliary_device_uninit(data);
+}
+
+static void ti_sn65dsi86_delete_aux(void *data)
+{
+ auxiliary_device_delete(data);
+}
+
+static void ti_sn65dsi86_aux_device_release(struct device *dev)
+{
+ struct auxiliary_device *aux = container_of(dev, struct auxiliary_device, dev);
+
+ kfree(aux);
+}
+
+static int ti_sn65dsi86_add_aux_device(struct ti_sn65dsi86 *pdata,
+ struct auxiliary_device **aux_out,
+ const char *name)
+{
+ struct device *dev = pdata->dev;
+ struct auxiliary_device *aux;
+ int ret;
+
+ aux = kzalloc(sizeof(*aux), GFP_KERNEL);
+ if (!aux)
+ return -ENOMEM;
+
+ aux->name = name;
+ aux->dev.parent = dev;
+ aux->dev.release = ti_sn65dsi86_aux_device_release;
+ device_set_of_node_from_dev(&aux->dev, dev);
+ ret = auxiliary_device_init(aux);
+ if (ret) {
+ kfree(aux);
+ return ret;
+ }
+ ret = devm_add_action_or_reset(dev, ti_sn65dsi86_uninit_aux, aux);
+ if (ret)
+ return ret;
+
+ ret = auxiliary_device_add(aux);
+ if (ret)
+ return ret;
+ ret = devm_add_action_or_reset(dev, ti_sn65dsi86_delete_aux, aux);
+ if (!ret)
+ *aux_out = aux;
+
+ return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * AUX Adapter
+ */
+
+static struct ti_sn65dsi86 *aux_to_ti_sn65dsi86(struct drm_dp_aux *aux)
+{
+ return container_of(aux, struct ti_sn65dsi86, aux);
+}
+
+static ssize_t ti_sn_aux_transfer(struct drm_dp_aux *aux,
+ struct drm_dp_aux_msg *msg)
+{
+ struct ti_sn65dsi86 *pdata = aux_to_ti_sn65dsi86(aux);
+ u32 request = msg->request & ~(DP_AUX_I2C_MOT | DP_AUX_I2C_WRITE_STATUS_UPDATE);
+ u32 request_val = AUX_CMD_REQ(msg->request);
+ u8 *buf = msg->buffer;
+ unsigned int len = msg->size;
+ unsigned int short_len;
+ unsigned int val;
+ int ret;
+ u8 addr_len[SN_AUX_LENGTH_REG + 1 - SN_AUX_ADDR_19_16_REG];
+
+ if (len > SN_AUX_MAX_PAYLOAD_BYTES)
+ return -EINVAL;
+
+ pm_runtime_get_sync(pdata->dev);
+ mutex_lock(&pdata->comms_mutex);
+
+ /*
+ * If someone tries to do a DDC over AUX transaction before pre_enable()
+ * on a device without a dedicated reference clock then we just can't
+ * do it. Fail right away. This prevents non-refclk users from reading
+ * the EDID before enabling the panel but such is life.
+ */
+ if (!pdata->comms_enabled) {
+ ret = -EIO;
+ goto exit;
+ }
+
+ switch (request) {
+ case DP_AUX_NATIVE_WRITE:
+ case DP_AUX_I2C_WRITE:
+ case DP_AUX_NATIVE_READ:
+ case DP_AUX_I2C_READ:
+ regmap_write(pdata->regmap, SN_AUX_CMD_REG, request_val);
+ /* Assume it's good */
+ msg->reply = 0;
+ break;
+ default:
+ ret = -EINVAL;
+ goto exit;
+ }
+
+ BUILD_BUG_ON(sizeof(addr_len) != sizeof(__be32));
+ put_unaligned_be32((msg->address & SN_AUX_ADDR_MASK) << 8 | len,
+ addr_len);
+ regmap_bulk_write(pdata->regmap, SN_AUX_ADDR_19_16_REG, addr_len,
+ ARRAY_SIZE(addr_len));
+
+ if (request == DP_AUX_NATIVE_WRITE || request == DP_AUX_I2C_WRITE)
+ regmap_bulk_write(pdata->regmap, SN_AUX_WDATA_REG(0), buf, len);
+
+ /* Clear old status bits before start so we don't get confused */
+ regmap_write(pdata->regmap, SN_AUX_CMD_STATUS_REG,
+ AUX_IRQ_STATUS_NAT_I2C_FAIL |
+ AUX_IRQ_STATUS_AUX_RPLY_TOUT |
+ AUX_IRQ_STATUS_AUX_SHORT);
+
+ regmap_write(pdata->regmap, SN_AUX_CMD_REG, request_val | AUX_CMD_SEND);
+
+ /* Zero delay loop because i2c transactions are slow already */
+ ret = regmap_read_poll_timeout(pdata->regmap, SN_AUX_CMD_REG, val,
+ !(val & AUX_CMD_SEND), 0, 50 * 1000);
+ if (ret)
+ goto exit;
+
+ ret = regmap_read(pdata->regmap, SN_AUX_CMD_STATUS_REG, &val);
+ if (ret)
+ goto exit;
+
+ if (val & AUX_IRQ_STATUS_AUX_RPLY_TOUT) {
+ /*
+ * The hardware tried the message seven times per the DP spec
+ * but it hit a timeout. We ignore defers here because they're
+ * handled in hardware.
+ */
+ ret = -ETIMEDOUT;
+ goto exit;
+ }
+
+ if (val & AUX_IRQ_STATUS_AUX_SHORT) {
+ ret = regmap_read(pdata->regmap, SN_AUX_LENGTH_REG, &short_len);
+ len = min(len, short_len);
+ if (ret)
+ goto exit;
+ } else if (val & AUX_IRQ_STATUS_NAT_I2C_FAIL) {
+ switch (request) {
+ case DP_AUX_I2C_WRITE:
+ case DP_AUX_I2C_READ:
+ msg->reply |= DP_AUX_I2C_REPLY_NACK;
+ break;
+ case DP_AUX_NATIVE_READ:
+ case DP_AUX_NATIVE_WRITE:
+ msg->reply |= DP_AUX_NATIVE_REPLY_NACK;
+ break;
+ }
+ len = 0;
+ goto exit;
+ }
+
+ if (request != DP_AUX_NATIVE_WRITE && request != DP_AUX_I2C_WRITE && len != 0)
+ ret = regmap_bulk_read(pdata->regmap, SN_AUX_RDATA_REG(0), buf, len);
+
+exit:
+ mutex_unlock(&pdata->comms_mutex);
+ pm_runtime_mark_last_busy(pdata->dev);
+ pm_runtime_put_autosuspend(pdata->dev);
+
+ if (ret)
+ return ret;
+ return len;
+}
+
+static int ti_sn_aux_probe(struct auxiliary_device *adev,
+ const struct auxiliary_device_id *id)
+{
+ struct ti_sn65dsi86 *pdata = dev_get_drvdata(adev->dev.parent);
+ int ret;
+
+ pdata->aux.name = "ti-sn65dsi86-aux";
+ pdata->aux.dev = &adev->dev;
+ pdata->aux.transfer = ti_sn_aux_transfer;
+ drm_dp_aux_init(&pdata->aux);
+
+ ret = devm_of_dp_aux_populate_ep_devices(&pdata->aux);
+ if (ret)
+ return ret;
+
+ /*
+ * The eDP to MIPI bridge parts don't work until the AUX channel is
+ * setup so we don't add it in the main driver probe, we add it now.
+ */
+ return ti_sn65dsi86_add_aux_device(pdata, &pdata->bridge_aux, "bridge");
+}
+
+static const struct auxiliary_device_id ti_sn_aux_id_table[] = {
+ { .name = "ti_sn65dsi86.aux", },
+ {},
+};
+
+static struct auxiliary_driver ti_sn_aux_driver = {
+ .name = "aux",
+ .probe = ti_sn_aux_probe,
+ .id_table = ti_sn_aux_id_table,
+};
+
+/*------------------------------------------------------------------------------
+ * DRM Bridge
+ */
+
+static struct ti_sn65dsi86 *bridge_to_ti_sn65dsi86(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct ti_sn65dsi86, bridge);
+}
+
+static int ti_sn_attach_host(struct auxiliary_device *adev, struct ti_sn65dsi86 *pdata)
+{
+ int val;
+ struct mipi_dsi_host *host;
+ struct mipi_dsi_device *dsi;
+ struct device *dev = pdata->dev;
+ const struct mipi_dsi_device_info info = { .type = "ti_sn_bridge",
+ .channel = 0,
+ .node = NULL,
+ };
+
+ host = of_find_mipi_dsi_host_by_node(pdata->host_node);
+ if (!host)
+ return -EPROBE_DEFER;
+
+ dsi = devm_mipi_dsi_device_register_full(&adev->dev, host, &info);
+ if (IS_ERR(dsi))
+ return PTR_ERR(dsi);
+
+ /* TODO: setting to 4 MIPI lanes always for now */
+ dsi->lanes = 4;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO;
+
+ /* check if continuous dsi clock is required or not */
+ pm_runtime_get_sync(dev);
+ regmap_read(pdata->regmap, SN_DPPLL_SRC_REG, &val);
+ pm_runtime_put_autosuspend(dev);
+ if (!(val & DPPLL_CLK_SRC_DSICLK))
+ dsi->mode_flags |= MIPI_DSI_CLOCK_NON_CONTINUOUS;
+
+ pdata->dsi = dsi;
+
+ return devm_mipi_dsi_attach(&adev->dev, dsi);
+}
+
+static int ti_sn_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
+ int ret;
+
+ pdata->aux.drm_dev = bridge->dev;
+ ret = drm_dp_aux_register(&pdata->aux);
+ if (ret < 0) {
+ drm_err(bridge->dev, "Failed to register DP AUX channel: %d\n", ret);
+ return ret;
+ }
+
+ /*
+ * Attach the next bridge.
+ * We never want the next bridge to *also* create a connector.
+ */
+ ret = drm_bridge_attach(bridge->encoder, pdata->next_bridge,
+ &pdata->bridge, flags | DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+ if (ret < 0)
+ goto err_initted_aux;
+
+ if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
+ return 0;
+
+ pdata->connector = drm_bridge_connector_init(pdata->bridge.dev,
+ pdata->bridge.encoder);
+ if (IS_ERR(pdata->connector)) {
+ ret = PTR_ERR(pdata->connector);
+ goto err_initted_aux;
+ }
+
+ drm_connector_attach_encoder(pdata->connector, pdata->bridge.encoder);
+
+ return 0;
+
+err_initted_aux:
+ drm_dp_aux_unregister(&pdata->aux);
+ return ret;
+}
+
+static void ti_sn_bridge_detach(struct drm_bridge *bridge)
+{
+ drm_dp_aux_unregister(&bridge_to_ti_sn65dsi86(bridge)->aux);
+}
+
+static enum drm_mode_status
+ti_sn_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ /* maximum supported resolution is 4K at 60 fps */
+ if (mode->clock > 594000)
+ return MODE_CLOCK_HIGH;
+
+ /*
+ * The front and back porch registers are 8 bits, and pulse width
+ * registers are 15 bits, so reject any modes with larger periods.
+ */
+
+ if ((mode->hsync_start - mode->hdisplay) > 0xff)
+ return MODE_HBLANK_WIDE;
+
+ if ((mode->vsync_start - mode->vdisplay) > 0xff)
+ return MODE_VBLANK_WIDE;
+
+ if ((mode->hsync_end - mode->hsync_start) > 0x7fff)
+ return MODE_HSYNC_WIDE;
+
+ if ((mode->vsync_end - mode->vsync_start) > 0x7fff)
+ return MODE_VSYNC_WIDE;
+
+ if ((mode->htotal - mode->hsync_end) > 0xff)
+ return MODE_HBLANK_WIDE;
+
+ if ((mode->vtotal - mode->vsync_end) > 0xff)
+ return MODE_VBLANK_WIDE;
+
+ return MODE_OK;
+}
+
+static void ti_sn_bridge_atomic_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
+
+ /* disable video stream */
+ regmap_update_bits(pdata->regmap, SN_ENH_FRAME_REG, VSTREAM_ENABLE, 0);
+}
+
+static void ti_sn_bridge_set_dsi_rate(struct ti_sn65dsi86 *pdata)
+{
+ unsigned int bit_rate_mhz, clk_freq_mhz;
+ unsigned int val;
+ struct drm_display_mode *mode =
+ &pdata->bridge.encoder->crtc->state->adjusted_mode;
+
+ /* set DSIA clk frequency */
+ bit_rate_mhz = (mode->clock / 1000) *
+ mipi_dsi_pixel_format_to_bpp(pdata->dsi->format);
+ clk_freq_mhz = bit_rate_mhz / (pdata->dsi->lanes * 2);
+
+ /* for each increment in val, frequency increases by 5MHz */
+ val = (MIN_DSI_CLK_FREQ_MHZ / 5) +
+ (((clk_freq_mhz - MIN_DSI_CLK_FREQ_MHZ) / 5) & 0xFF);
+ regmap_write(pdata->regmap, SN_DSIA_CLK_FREQ_REG, val);
+}
+
+static unsigned int ti_sn_bridge_get_bpp(struct drm_connector *connector)
+{
+ if (connector->display_info.bpc <= 6)
+ return 18;
+ else
+ return 24;
+}
+
+/*
+ * LUT index corresponds to register value and
+ * LUT values corresponds to dp data rate supported
+ * by the bridge in Mbps unit.
+ */
+static const unsigned int ti_sn_bridge_dp_rate_lut[] = {
+ 0, 1620, 2160, 2430, 2700, 3240, 4320, 5400
+};
+
+static int ti_sn_bridge_calc_min_dp_rate_idx(struct ti_sn65dsi86 *pdata, unsigned int bpp)
+{
+ unsigned int bit_rate_khz, dp_rate_mhz;
+ unsigned int i;
+ struct drm_display_mode *mode =
+ &pdata->bridge.encoder->crtc->state->adjusted_mode;
+
+ /* Calculate minimum bit rate based on our pixel clock. */
+ bit_rate_khz = mode->clock * bpp;
+
+ /* Calculate minimum DP data rate, taking 80% as per DP spec */
+ dp_rate_mhz = DIV_ROUND_UP(bit_rate_khz * DP_CLK_FUDGE_NUM,
+ 1000 * pdata->dp_lanes * DP_CLK_FUDGE_DEN);
+
+ for (i = 1; i < ARRAY_SIZE(ti_sn_bridge_dp_rate_lut) - 1; i++)
+ if (ti_sn_bridge_dp_rate_lut[i] >= dp_rate_mhz)
+ break;
+
+ return i;
+}
+
+static unsigned int ti_sn_bridge_read_valid_rates(struct ti_sn65dsi86 *pdata)
+{
+ unsigned int valid_rates = 0;
+ unsigned int rate_per_200khz;
+ unsigned int rate_mhz;
+ u8 dpcd_val;
+ int ret;
+ int i, j;
+
+ ret = drm_dp_dpcd_readb(&pdata->aux, DP_EDP_DPCD_REV, &dpcd_val);
+ if (ret != 1) {
+ DRM_DEV_ERROR(pdata->dev,
+ "Can't read eDP rev (%d), assuming 1.1\n", ret);
+ dpcd_val = DP_EDP_11;
+ }
+
+ if (dpcd_val >= DP_EDP_14) {
+ /* eDP 1.4 devices must provide a custom table */
+ __le16 sink_rates[DP_MAX_SUPPORTED_RATES];
+
+ ret = drm_dp_dpcd_read(&pdata->aux, DP_SUPPORTED_LINK_RATES,
+ sink_rates, sizeof(sink_rates));
+
+ if (ret != sizeof(sink_rates)) {
+ DRM_DEV_ERROR(pdata->dev,
+ "Can't read supported rate table (%d)\n", ret);
+
+ /* By zeroing we'll fall back to DP_MAX_LINK_RATE. */
+ memset(sink_rates, 0, sizeof(sink_rates));
+ }
+
+ for (i = 0; i < ARRAY_SIZE(sink_rates); i++) {
+ rate_per_200khz = le16_to_cpu(sink_rates[i]);
+
+ if (!rate_per_200khz)
+ break;
+
+ rate_mhz = rate_per_200khz * 200 / 1000;
+ for (j = 0;
+ j < ARRAY_SIZE(ti_sn_bridge_dp_rate_lut);
+ j++) {
+ if (ti_sn_bridge_dp_rate_lut[j] == rate_mhz)
+ valid_rates |= BIT(j);
+ }
+ }
+
+ for (i = 0; i < ARRAY_SIZE(ti_sn_bridge_dp_rate_lut); i++) {
+ if (valid_rates & BIT(i))
+ return valid_rates;
+ }
+ DRM_DEV_ERROR(pdata->dev,
+ "No matching eDP rates in table; falling back\n");
+ }
+
+ /* On older versions best we can do is use DP_MAX_LINK_RATE */
+ ret = drm_dp_dpcd_readb(&pdata->aux, DP_MAX_LINK_RATE, &dpcd_val);
+ if (ret != 1) {
+ DRM_DEV_ERROR(pdata->dev,
+ "Can't read max rate (%d); assuming 5.4 GHz\n",
+ ret);
+ dpcd_val = DP_LINK_BW_5_4;
+ }
+
+ switch (dpcd_val) {
+ default:
+ DRM_DEV_ERROR(pdata->dev,
+ "Unexpected max rate (%#x); assuming 5.4 GHz\n",
+ (int)dpcd_val);
+ fallthrough;
+ case DP_LINK_BW_5_4:
+ valid_rates |= BIT(7);
+ fallthrough;
+ case DP_LINK_BW_2_7:
+ valid_rates |= BIT(4);
+ fallthrough;
+ case DP_LINK_BW_1_62:
+ valid_rates |= BIT(1);
+ break;
+ }
+
+ return valid_rates;
+}
+
+static void ti_sn_bridge_set_video_timings(struct ti_sn65dsi86 *pdata)
+{
+ struct drm_display_mode *mode =
+ &pdata->bridge.encoder->crtc->state->adjusted_mode;
+ u8 hsync_polarity = 0, vsync_polarity = 0;
+
+ if (mode->flags & DRM_MODE_FLAG_NHSYNC)
+ hsync_polarity = CHA_HSYNC_POLARITY;
+ if (mode->flags & DRM_MODE_FLAG_NVSYNC)
+ vsync_polarity = CHA_VSYNC_POLARITY;
+
+ ti_sn65dsi86_write_u16(pdata, SN_CHA_ACTIVE_LINE_LENGTH_LOW_REG,
+ mode->hdisplay);
+ ti_sn65dsi86_write_u16(pdata, SN_CHA_VERTICAL_DISPLAY_SIZE_LOW_REG,
+ mode->vdisplay);
+ regmap_write(pdata->regmap, SN_CHA_HSYNC_PULSE_WIDTH_LOW_REG,
+ (mode->hsync_end - mode->hsync_start) & 0xFF);
+ regmap_write(pdata->regmap, SN_CHA_HSYNC_PULSE_WIDTH_HIGH_REG,
+ (((mode->hsync_end - mode->hsync_start) >> 8) & 0x7F) |
+ hsync_polarity);
+ regmap_write(pdata->regmap, SN_CHA_VSYNC_PULSE_WIDTH_LOW_REG,
+ (mode->vsync_end - mode->vsync_start) & 0xFF);
+ regmap_write(pdata->regmap, SN_CHA_VSYNC_PULSE_WIDTH_HIGH_REG,
+ (((mode->vsync_end - mode->vsync_start) >> 8) & 0x7F) |
+ vsync_polarity);
+
+ regmap_write(pdata->regmap, SN_CHA_HORIZONTAL_BACK_PORCH_REG,
+ (mode->htotal - mode->hsync_end) & 0xFF);
+ regmap_write(pdata->regmap, SN_CHA_VERTICAL_BACK_PORCH_REG,
+ (mode->vtotal - mode->vsync_end) & 0xFF);
+
+ regmap_write(pdata->regmap, SN_CHA_HORIZONTAL_FRONT_PORCH_REG,
+ (mode->hsync_start - mode->hdisplay) & 0xFF);
+ regmap_write(pdata->regmap, SN_CHA_VERTICAL_FRONT_PORCH_REG,
+ (mode->vsync_start - mode->vdisplay) & 0xFF);
+
+ usleep_range(10000, 10500); /* 10ms delay recommended by spec */
+}
+
+static unsigned int ti_sn_get_max_lanes(struct ti_sn65dsi86 *pdata)
+{
+ u8 data;
+ int ret;
+
+ ret = drm_dp_dpcd_readb(&pdata->aux, DP_MAX_LANE_COUNT, &data);
+ if (ret != 1) {
+ DRM_DEV_ERROR(pdata->dev,
+ "Can't read lane count (%d); assuming 4\n", ret);
+ return 4;
+ }
+
+ return data & DP_LANE_COUNT_MASK;
+}
+
+static int ti_sn_link_training(struct ti_sn65dsi86 *pdata, int dp_rate_idx,
+ const char **last_err_str)
+{
+ unsigned int val;
+ int ret;
+ int i;
+
+ /* set dp clk frequency value */
+ regmap_update_bits(pdata->regmap, SN_DATARATE_CONFIG_REG,
+ DP_DATARATE_MASK, DP_DATARATE(dp_rate_idx));
+
+ /* enable DP PLL */
+ regmap_write(pdata->regmap, SN_PLL_ENABLE_REG, 1);
+
+ ret = regmap_read_poll_timeout(pdata->regmap, SN_DPPLL_SRC_REG, val,
+ val & DPPLL_SRC_DP_PLL_LOCK, 1000,
+ 50 * 1000);
+ if (ret) {
+ *last_err_str = "DP_PLL_LOCK polling failed";
+ goto exit;
+ }
+
+ /*
+ * We'll try to link train several times. As part of link training
+ * the bridge chip will write DP_SET_POWER_D0 to DP_SET_POWER. If
+ * the panel isn't ready quite it might respond NAK here which means
+ * we need to try again.
+ */
+ for (i = 0; i < SN_LINK_TRAINING_TRIES; i++) {
+ /* Semi auto link training mode */
+ regmap_write(pdata->regmap, SN_ML_TX_MODE_REG, 0x0A);
+ ret = regmap_read_poll_timeout(pdata->regmap, SN_ML_TX_MODE_REG, val,
+ val == ML_TX_MAIN_LINK_OFF ||
+ val == ML_TX_NORMAL_MODE, 1000,
+ 500 * 1000);
+ if (ret) {
+ *last_err_str = "Training complete polling failed";
+ } else if (val == ML_TX_MAIN_LINK_OFF) {
+ *last_err_str = "Link training failed, link is off";
+ ret = -EIO;
+ continue;
+ }
+
+ break;
+ }
+
+ /* If we saw quite a few retries, add a note about it */
+ if (!ret && i > SN_LINK_TRAINING_TRIES / 2)
+ DRM_DEV_INFO(pdata->dev, "Link training needed %d retries\n", i);
+
+exit:
+ /* Disable the PLL if we failed */
+ if (ret)
+ regmap_write(pdata->regmap, SN_PLL_ENABLE_REG, 0);
+
+ return ret;
+}
+
+static void ti_sn_bridge_atomic_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
+ struct drm_connector *connector;
+ const char *last_err_str = "No supported DP rate";
+ unsigned int valid_rates;
+ int dp_rate_idx;
+ unsigned int val;
+ int ret = -EINVAL;
+ int max_dp_lanes;
+ unsigned int bpp;
+
+ connector = drm_atomic_get_new_connector_for_encoder(old_bridge_state->base.state,
+ bridge->encoder);
+ if (!connector) {
+ dev_err_ratelimited(pdata->dev, "Could not get the connector\n");
+ return;
+ }
+
+ max_dp_lanes = ti_sn_get_max_lanes(pdata);
+ pdata->dp_lanes = min(pdata->dp_lanes, max_dp_lanes);
+
+ /* DSI_A lane config */
+ val = CHA_DSI_LANES(SN_MAX_DP_LANES - pdata->dsi->lanes);
+ regmap_update_bits(pdata->regmap, SN_DSI_LANES_REG,
+ CHA_DSI_LANES_MASK, val);
+
+ regmap_write(pdata->regmap, SN_LN_ASSIGN_REG, pdata->ln_assign);
+ regmap_update_bits(pdata->regmap, SN_ENH_FRAME_REG, LN_POLRS_MASK,
+ pdata->ln_polrs << LN_POLRS_OFFSET);
+
+ /* set dsi clk frequency value */
+ ti_sn_bridge_set_dsi_rate(pdata);
+
+ /*
+ * The SN65DSI86 only supports ASSR Display Authentication method and
+ * this method is enabled for eDP panels. An eDP panel must support this
+ * authentication method. We need to enable this method in the eDP panel
+ * at DisplayPort address 0x0010A prior to link training.
+ *
+ * As only ASSR is supported by SN65DSI86, for full DisplayPort displays
+ * we need to disable the scrambler.
+ */
+ if (pdata->bridge.type == DRM_MODE_CONNECTOR_eDP) {
+ drm_dp_dpcd_writeb(&pdata->aux, DP_EDP_CONFIGURATION_SET,
+ DP_ALTERNATE_SCRAMBLER_RESET_ENABLE);
+
+ regmap_update_bits(pdata->regmap, SN_TRAINING_SETTING_REG,
+ SCRAMBLE_DISABLE, 0);
+ } else {
+ regmap_update_bits(pdata->regmap, SN_TRAINING_SETTING_REG,
+ SCRAMBLE_DISABLE, SCRAMBLE_DISABLE);
+ }
+
+ bpp = ti_sn_bridge_get_bpp(connector);
+ /* Set the DP output format (18 bpp or 24 bpp) */
+ val = bpp == 18 ? BPP_18_RGB : 0;
+ regmap_update_bits(pdata->regmap, SN_DATA_FORMAT_REG, BPP_18_RGB, val);
+
+ /* DP lane config */
+ val = DP_NUM_LANES(min(pdata->dp_lanes, 3));
+ regmap_update_bits(pdata->regmap, SN_SSC_CONFIG_REG, DP_NUM_LANES_MASK,
+ val);
+
+ valid_rates = ti_sn_bridge_read_valid_rates(pdata);
+
+ /* Train until we run out of rates */
+ for (dp_rate_idx = ti_sn_bridge_calc_min_dp_rate_idx(pdata, bpp);
+ dp_rate_idx < ARRAY_SIZE(ti_sn_bridge_dp_rate_lut);
+ dp_rate_idx++) {
+ if (!(valid_rates & BIT(dp_rate_idx)))
+ continue;
+
+ ret = ti_sn_link_training(pdata, dp_rate_idx, &last_err_str);
+ if (!ret)
+ break;
+ }
+ if (ret) {
+ DRM_DEV_ERROR(pdata->dev, "%s (%d)\n", last_err_str, ret);
+ return;
+ }
+
+ /* config video parameters */
+ ti_sn_bridge_set_video_timings(pdata);
+
+ /* enable video stream */
+ regmap_update_bits(pdata->regmap, SN_ENH_FRAME_REG, VSTREAM_ENABLE,
+ VSTREAM_ENABLE);
+}
+
+static void ti_sn_bridge_atomic_pre_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
+
+ pm_runtime_get_sync(pdata->dev);
+
+ if (!pdata->refclk)
+ ti_sn65dsi86_enable_comms(pdata);
+
+ /* td7: min 100 us after enable before DSI data */
+ usleep_range(100, 110);
+}
+
+static void ti_sn_bridge_atomic_post_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_bridge_state)
+{
+ struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
+
+ /* semi auto link training mode OFF */
+ regmap_write(pdata->regmap, SN_ML_TX_MODE_REG, 0);
+ /* Num lanes to 0 as per power sequencing in data sheet */
+ regmap_update_bits(pdata->regmap, SN_SSC_CONFIG_REG, DP_NUM_LANES_MASK, 0);
+ /* disable DP PLL */
+ regmap_write(pdata->regmap, SN_PLL_ENABLE_REG, 0);
+
+ if (!pdata->refclk)
+ ti_sn65dsi86_disable_comms(pdata);
+
+ pm_runtime_put_sync(pdata->dev);
+}
+
+static enum drm_connector_status ti_sn_bridge_detect(struct drm_bridge *bridge)
+{
+ struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
+ int val = 0;
+
+ pm_runtime_get_sync(pdata->dev);
+ regmap_read(pdata->regmap, SN_HPD_DISABLE_REG, &val);
+ pm_runtime_put_autosuspend(pdata->dev);
+
+ return val & HPD_DEBOUNCED_STATE ? connector_status_connected
+ : connector_status_disconnected;
+}
+
+static struct edid *ti_sn_bridge_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
+
+ return drm_get_edid(connector, &pdata->aux.ddc);
+}
+
+static const struct drm_bridge_funcs ti_sn_bridge_funcs = {
+ .attach = ti_sn_bridge_attach,
+ .detach = ti_sn_bridge_detach,
+ .mode_valid = ti_sn_bridge_mode_valid,
+ .get_edid = ti_sn_bridge_get_edid,
+ .detect = ti_sn_bridge_detect,
+ .atomic_pre_enable = ti_sn_bridge_atomic_pre_enable,
+ .atomic_enable = ti_sn_bridge_atomic_enable,
+ .atomic_disable = ti_sn_bridge_atomic_disable,
+ .atomic_post_disable = ti_sn_bridge_atomic_post_disable,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+};
+
+static void ti_sn_bridge_parse_lanes(struct ti_sn65dsi86 *pdata,
+ struct device_node *np)
+{
+ u32 lane_assignments[SN_MAX_DP_LANES] = { 0, 1, 2, 3 };
+ u32 lane_polarities[SN_MAX_DP_LANES] = { };
+ struct device_node *endpoint;
+ u8 ln_assign = 0;
+ u8 ln_polrs = 0;
+ int dp_lanes;
+ int i;
+
+ /*
+ * Read config from the device tree about lane remapping and lane
+ * polarities. These are optional and we assume identity map and
+ * normal polarity if nothing is specified. It's OK to specify just
+ * data-lanes but not lane-polarities but not vice versa.
+ *
+ * Error checking is light (we just make sure we don't crash or
+ * buffer overrun) and we assume dts is well formed and specifying
+ * mappings that the hardware supports.
+ */
+ endpoint = of_graph_get_endpoint_by_regs(np, 1, -1);
+ dp_lanes = drm_of_get_data_lanes_count(endpoint, 1, SN_MAX_DP_LANES);
+ if (dp_lanes > 0) {
+ of_property_read_u32_array(endpoint, "data-lanes",
+ lane_assignments, dp_lanes);
+ of_property_read_u32_array(endpoint, "lane-polarities",
+ lane_polarities, dp_lanes);
+ } else {
+ dp_lanes = SN_MAX_DP_LANES;
+ }
+ of_node_put(endpoint);
+
+ /*
+ * Convert into register format. Loop over all lanes even if
+ * data-lanes had fewer elements so that we nicely initialize
+ * the LN_ASSIGN register.
+ */
+ for (i = SN_MAX_DP_LANES - 1; i >= 0; i--) {
+ ln_assign = ln_assign << LN_ASSIGN_WIDTH | lane_assignments[i];
+ ln_polrs = ln_polrs << 1 | lane_polarities[i];
+ }
+
+ /* Stash in our struct for when we power on */
+ pdata->dp_lanes = dp_lanes;
+ pdata->ln_assign = ln_assign;
+ pdata->ln_polrs = ln_polrs;
+}
+
+static int ti_sn_bridge_parse_dsi_host(struct ti_sn65dsi86 *pdata)
+{
+ struct device_node *np = pdata->dev->of_node;
+
+ pdata->host_node = of_graph_get_remote_node(np, 0, 0);
+
+ if (!pdata->host_node) {
+ DRM_ERROR("remote dsi host node not found\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int ti_sn_bridge_probe(struct auxiliary_device *adev,
+ const struct auxiliary_device_id *id)
+{
+ struct ti_sn65dsi86 *pdata = dev_get_drvdata(adev->dev.parent);
+ struct device_node *np = pdata->dev->of_node;
+ int ret;
+
+ pdata->next_bridge = devm_drm_of_get_bridge(&adev->dev, np, 1, 0);
+ if (IS_ERR(pdata->next_bridge))
+ return dev_err_probe(&adev->dev, PTR_ERR(pdata->next_bridge),
+ "failed to create panel bridge\n");
+
+ ti_sn_bridge_parse_lanes(pdata, np);
+
+ ret = ti_sn_bridge_parse_dsi_host(pdata);
+ if (ret)
+ return ret;
+
+ pdata->bridge.funcs = &ti_sn_bridge_funcs;
+ pdata->bridge.of_node = np;
+ pdata->bridge.type = pdata->next_bridge->type == DRM_MODE_CONNECTOR_DisplayPort
+ ? DRM_MODE_CONNECTOR_DisplayPort : DRM_MODE_CONNECTOR_eDP;
+
+ if (pdata->bridge.type == DRM_MODE_CONNECTOR_DisplayPort)
+ pdata->bridge.ops = DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_DETECT;
+
+ drm_bridge_add(&pdata->bridge);
+
+ ret = ti_sn_attach_host(adev, pdata);
+ if (ret) {
+ dev_err_probe(&adev->dev, ret, "failed to attach dsi host\n");
+ goto err_remove_bridge;
+ }
+
+ return 0;
+
+err_remove_bridge:
+ drm_bridge_remove(&pdata->bridge);
+ return ret;
+}
+
+static void ti_sn_bridge_remove(struct auxiliary_device *adev)
+{
+ struct ti_sn65dsi86 *pdata = dev_get_drvdata(adev->dev.parent);
+
+ if (!pdata)
+ return;
+
+ drm_bridge_remove(&pdata->bridge);
+
+ of_node_put(pdata->host_node);
+}
+
+static const struct auxiliary_device_id ti_sn_bridge_id_table[] = {
+ { .name = "ti_sn65dsi86.bridge", },
+ {},
+};
+
+static struct auxiliary_driver ti_sn_bridge_driver = {
+ .name = "bridge",
+ .probe = ti_sn_bridge_probe,
+ .remove = ti_sn_bridge_remove,
+ .id_table = ti_sn_bridge_id_table,
+};
+
+/* -----------------------------------------------------------------------------
+ * PWM Controller
+ */
+#if defined(CONFIG_PWM)
+static int ti_sn_pwm_pin_request(struct ti_sn65dsi86 *pdata)
+{
+ return atomic_xchg(&pdata->pwm_pin_busy, 1) ? -EBUSY : 0;
+}
+
+static void ti_sn_pwm_pin_release(struct ti_sn65dsi86 *pdata)
+{
+ atomic_set(&pdata->pwm_pin_busy, 0);
+}
+
+static struct ti_sn65dsi86 *pwm_chip_to_ti_sn_bridge(struct pwm_chip *chip)
+{
+ return container_of(chip, struct ti_sn65dsi86, pchip);
+}
+
+static int ti_sn_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
+{
+ struct ti_sn65dsi86 *pdata = pwm_chip_to_ti_sn_bridge(chip);
+
+ return ti_sn_pwm_pin_request(pdata);
+}
+
+static void ti_sn_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)
+{
+ struct ti_sn65dsi86 *pdata = pwm_chip_to_ti_sn_bridge(chip);
+
+ ti_sn_pwm_pin_release(pdata);
+}
+
+/*
+ * Limitations:
+ * - The PWM signal is not driven when the chip is powered down, or in its
+ * reset state and the driver does not implement the "suspend state"
+ * described in the documentation. In order to save power, state->enabled is
+ * interpreted as denoting if the signal is expected to be valid, and is used
+ * to determine if the chip needs to be kept powered.
+ * - Changing both period and duty_cycle is not done atomically, neither is the
+ * multi-byte register updates, so the output might briefly be undefined
+ * during update.
+ */
+static int ti_sn_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+ const struct pwm_state *state)
+{
+ struct ti_sn65dsi86 *pdata = pwm_chip_to_ti_sn_bridge(chip);
+ unsigned int pwm_en_inv;
+ unsigned int backlight;
+ unsigned int pre_div;
+ unsigned int scale;
+ u64 period_max;
+ u64 period;
+ int ret;
+
+ if (!pdata->pwm_enabled) {
+ ret = pm_runtime_get_sync(pdata->dev);
+ if (ret < 0) {
+ pm_runtime_put_sync(pdata->dev);
+ return ret;
+ }
+ }
+
+ if (state->enabled) {
+ if (!pdata->pwm_enabled) {
+ /*
+ * The chip might have been powered down while we
+ * didn't hold a PM runtime reference, so mux in the
+ * PWM function on the GPIO pin again.
+ */
+ ret = regmap_update_bits(pdata->regmap, SN_GPIO_CTRL_REG,
+ SN_GPIO_MUX_MASK << (2 * SN_PWM_GPIO_IDX),
+ SN_GPIO_MUX_SPECIAL << (2 * SN_PWM_GPIO_IDX));
+ if (ret) {
+ dev_err(pdata->dev, "failed to mux in PWM function\n");
+ goto out;
+ }
+ }
+
+ /*
+ * Per the datasheet the PWM frequency is given by:
+ *
+ * REFCLK_FREQ
+ * PWM_FREQ = -----------------------------------
+ * PWM_PRE_DIV * BACKLIGHT_SCALE + 1
+ *
+ * However, after careful review the author is convinced that
+ * the documentation has lost some parenthesis around
+ * "BACKLIGHT_SCALE + 1".
+ *
+ * With the period T_pwm = 1/PWM_FREQ this can be written:
+ *
+ * T_pwm * REFCLK_FREQ = PWM_PRE_DIV * (BACKLIGHT_SCALE + 1)
+ *
+ * In order to keep BACKLIGHT_SCALE within its 16 bits,
+ * PWM_PRE_DIV must be:
+ *
+ * T_pwm * REFCLK_FREQ
+ * PWM_PRE_DIV >= -------------------------
+ * BACKLIGHT_SCALE_MAX + 1
+ *
+ * To simplify the search and to favour higher resolution of
+ * the duty cycle over accuracy of the period, the lowest
+ * possible PWM_PRE_DIV is used. Finally the scale is
+ * calculated as:
+ *
+ * T_pwm * REFCLK_FREQ
+ * BACKLIGHT_SCALE = ---------------------- - 1
+ * PWM_PRE_DIV
+ *
+ * Here T_pwm is represented in seconds, so appropriate scaling
+ * to nanoseconds is necessary.
+ */
+
+ /* Minimum T_pwm is 1 / REFCLK_FREQ */
+ if (state->period <= NSEC_PER_SEC / pdata->pwm_refclk_freq) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /*
+ * Maximum T_pwm is 255 * (65535 + 1) / REFCLK_FREQ
+ * Limit period to this to avoid overflows
+ */
+ period_max = div_u64((u64)NSEC_PER_SEC * 255 * (65535 + 1),
+ pdata->pwm_refclk_freq);
+ period = min(state->period, period_max);
+
+ pre_div = DIV64_U64_ROUND_UP(period * pdata->pwm_refclk_freq,
+ (u64)NSEC_PER_SEC * (BACKLIGHT_SCALE_MAX + 1));
+ scale = div64_u64(period * pdata->pwm_refclk_freq, (u64)NSEC_PER_SEC * pre_div) - 1;
+
+ /*
+ * The documentation has the duty ratio given as:
+ *
+ * duty BACKLIGHT
+ * ------- = ---------------------
+ * period BACKLIGHT_SCALE + 1
+ *
+ * Solve for BACKLIGHT, substituting BACKLIGHT_SCALE according
+ * to definition above and adjusting for nanosecond
+ * representation of duty cycle gives us:
+ */
+ backlight = div64_u64(state->duty_cycle * pdata->pwm_refclk_freq,
+ (u64)NSEC_PER_SEC * pre_div);
+ if (backlight > scale)
+ backlight = scale;
+
+ ret = regmap_write(pdata->regmap, SN_PWM_PRE_DIV_REG, pre_div);
+ if (ret) {
+ dev_err(pdata->dev, "failed to update PWM_PRE_DIV\n");
+ goto out;
+ }
+
+ ti_sn65dsi86_write_u16(pdata, SN_BACKLIGHT_SCALE_REG, scale);
+ ti_sn65dsi86_write_u16(pdata, SN_BACKLIGHT_REG, backlight);
+ }
+
+ pwm_en_inv = FIELD_PREP(SN_PWM_EN_MASK, state->enabled) |
+ FIELD_PREP(SN_PWM_INV_MASK, state->polarity == PWM_POLARITY_INVERSED);
+ ret = regmap_write(pdata->regmap, SN_PWM_EN_INV_REG, pwm_en_inv);
+ if (ret) {
+ dev_err(pdata->dev, "failed to update PWM_EN/PWM_INV\n");
+ goto out;
+ }
+
+ pdata->pwm_enabled = state->enabled;
+out:
+
+ if (!pdata->pwm_enabled)
+ pm_runtime_put_sync(pdata->dev);
+
+ return ret;
+}
+
+static int ti_sn_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
+ struct pwm_state *state)
+{
+ struct ti_sn65dsi86 *pdata = pwm_chip_to_ti_sn_bridge(chip);
+ unsigned int pwm_en_inv;
+ unsigned int pre_div;
+ u16 backlight;
+ u16 scale;
+ int ret;
+
+ ret = regmap_read(pdata->regmap, SN_PWM_EN_INV_REG, &pwm_en_inv);
+ if (ret)
+ return 0;
+
+ ret = ti_sn65dsi86_read_u16(pdata, SN_BACKLIGHT_SCALE_REG, &scale);
+ if (ret)
+ return 0;
+
+ ret = ti_sn65dsi86_read_u16(pdata, SN_BACKLIGHT_REG, &backlight);
+ if (ret)
+ return 0;
+
+ ret = regmap_read(pdata->regmap, SN_PWM_PRE_DIV_REG, &pre_div);
+ if (ret)
+ return 0;
+
+ state->enabled = FIELD_GET(SN_PWM_EN_MASK, pwm_en_inv);
+ if (FIELD_GET(SN_PWM_INV_MASK, pwm_en_inv))
+ state->polarity = PWM_POLARITY_INVERSED;
+ else
+ state->polarity = PWM_POLARITY_NORMAL;
+
+ state->period = DIV_ROUND_UP_ULL((u64)NSEC_PER_SEC * pre_div * (scale + 1),
+ pdata->pwm_refclk_freq);
+ state->duty_cycle = DIV_ROUND_UP_ULL((u64)NSEC_PER_SEC * pre_div * backlight,
+ pdata->pwm_refclk_freq);
+
+ if (state->duty_cycle > state->period)
+ state->duty_cycle = state->period;
+
+ return 0;
+}
+
+static const struct pwm_ops ti_sn_pwm_ops = {
+ .request = ti_sn_pwm_request,
+ .free = ti_sn_pwm_free,
+ .apply = ti_sn_pwm_apply,
+ .get_state = ti_sn_pwm_get_state,
+ .owner = THIS_MODULE,
+};
+
+static int ti_sn_pwm_probe(struct auxiliary_device *adev,
+ const struct auxiliary_device_id *id)
+{
+ struct ti_sn65dsi86 *pdata = dev_get_drvdata(adev->dev.parent);
+
+ pdata->pchip.dev = pdata->dev;
+ pdata->pchip.ops = &ti_sn_pwm_ops;
+ pdata->pchip.npwm = 1;
+ pdata->pchip.of_xlate = of_pwm_single_xlate;
+ pdata->pchip.of_pwm_n_cells = 1;
+
+ return pwmchip_add(&pdata->pchip);
+}
+
+static void ti_sn_pwm_remove(struct auxiliary_device *adev)
+{
+ struct ti_sn65dsi86 *pdata = dev_get_drvdata(adev->dev.parent);
+
+ pwmchip_remove(&pdata->pchip);
+
+ if (pdata->pwm_enabled)
+ pm_runtime_put_sync(pdata->dev);
+}
+
+static const struct auxiliary_device_id ti_sn_pwm_id_table[] = {
+ { .name = "ti_sn65dsi86.pwm", },
+ {},
+};
+
+static struct auxiliary_driver ti_sn_pwm_driver = {
+ .name = "pwm",
+ .probe = ti_sn_pwm_probe,
+ .remove = ti_sn_pwm_remove,
+ .id_table = ti_sn_pwm_id_table,
+};
+
+static int __init ti_sn_pwm_register(void)
+{
+ return auxiliary_driver_register(&ti_sn_pwm_driver);
+}
+
+static void ti_sn_pwm_unregister(void)
+{
+ auxiliary_driver_unregister(&ti_sn_pwm_driver);
+}
+
+#else
+static inline int ti_sn_pwm_pin_request(struct ti_sn65dsi86 *pdata) { return 0; }
+static inline void ti_sn_pwm_pin_release(struct ti_sn65dsi86 *pdata) {}
+
+static inline int ti_sn_pwm_register(void) { return 0; }
+static inline void ti_sn_pwm_unregister(void) {}
+#endif
+
+/* -----------------------------------------------------------------------------
+ * GPIO Controller
+ */
+#if defined(CONFIG_OF_GPIO)
+
+static int tn_sn_bridge_of_xlate(struct gpio_chip *chip,
+ const struct of_phandle_args *gpiospec,
+ u32 *flags)
+{
+ if (WARN_ON(gpiospec->args_count < chip->of_gpio_n_cells))
+ return -EINVAL;
+
+ if (gpiospec->args[0] > chip->ngpio || gpiospec->args[0] < 1)
+ return -EINVAL;
+
+ if (flags)
+ *flags = gpiospec->args[1];
+
+ return gpiospec->args[0] - SN_GPIO_PHYSICAL_OFFSET;
+}
+
+static int ti_sn_bridge_gpio_get_direction(struct gpio_chip *chip,
+ unsigned int offset)
+{
+ struct ti_sn65dsi86 *pdata = gpiochip_get_data(chip);
+
+ /*
+ * We already have to keep track of the direction because we use
+ * that to figure out whether we've powered the device. We can
+ * just return that rather than (maybe) powering up the device
+ * to ask its direction.
+ */
+ return test_bit(offset, pdata->gchip_output) ?
+ GPIO_LINE_DIRECTION_OUT : GPIO_LINE_DIRECTION_IN;
+}
+
+static int ti_sn_bridge_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+ struct ti_sn65dsi86 *pdata = gpiochip_get_data(chip);
+ unsigned int val;
+ int ret;
+
+ /*
+ * When the pin is an input we don't forcibly keep the bridge
+ * powered--we just power it on to read the pin. NOTE: part of
+ * the reason this works is that the bridge defaults (when
+ * powered back on) to all 4 GPIOs being configured as GPIO input.
+ * Also note that if something else is keeping the chip powered the
+ * pm_runtime functions are lightweight increments of a refcount.
+ */
+ pm_runtime_get_sync(pdata->dev);
+ ret = regmap_read(pdata->regmap, SN_GPIO_IO_REG, &val);
+ pm_runtime_put_autosuspend(pdata->dev);
+
+ if (ret)
+ return ret;
+
+ return !!(val & BIT(SN_GPIO_INPUT_SHIFT + offset));
+}
+
+static void ti_sn_bridge_gpio_set(struct gpio_chip *chip, unsigned int offset,
+ int val)
+{
+ struct ti_sn65dsi86 *pdata = gpiochip_get_data(chip);
+ int ret;
+
+ if (!test_bit(offset, pdata->gchip_output)) {
+ dev_err(pdata->dev, "Ignoring GPIO set while input\n");
+ return;
+ }
+
+ val &= 1;
+ ret = regmap_update_bits(pdata->regmap, SN_GPIO_IO_REG,
+ BIT(SN_GPIO_OUTPUT_SHIFT + offset),
+ val << (SN_GPIO_OUTPUT_SHIFT + offset));
+ if (ret)
+ dev_warn(pdata->dev,
+ "Failed to set bridge GPIO %u: %d\n", offset, ret);
+}
+
+static int ti_sn_bridge_gpio_direction_input(struct gpio_chip *chip,
+ unsigned int offset)
+{
+ struct ti_sn65dsi86 *pdata = gpiochip_get_data(chip);
+ int shift = offset * 2;
+ int ret;
+
+ if (!test_and_clear_bit(offset, pdata->gchip_output))
+ return 0;
+
+ ret = regmap_update_bits(pdata->regmap, SN_GPIO_CTRL_REG,
+ SN_GPIO_MUX_MASK << shift,
+ SN_GPIO_MUX_INPUT << shift);
+ if (ret) {
+ set_bit(offset, pdata->gchip_output);
+ return ret;
+ }
+
+ /*
+ * NOTE: if nobody else is powering the device this may fully power
+ * it off and when it comes back it will have lost all state, but
+ * that's OK because the default is input and we're now an input.
+ */
+ pm_runtime_put_autosuspend(pdata->dev);
+
+ return 0;
+}
+
+static int ti_sn_bridge_gpio_direction_output(struct gpio_chip *chip,
+ unsigned int offset, int val)
+{
+ struct ti_sn65dsi86 *pdata = gpiochip_get_data(chip);
+ int shift = offset * 2;
+ int ret;
+
+ if (test_and_set_bit(offset, pdata->gchip_output))
+ return 0;
+
+ pm_runtime_get_sync(pdata->dev);
+
+ /* Set value first to avoid glitching */
+ ti_sn_bridge_gpio_set(chip, offset, val);
+
+ /* Set direction */
+ ret = regmap_update_bits(pdata->regmap, SN_GPIO_CTRL_REG,
+ SN_GPIO_MUX_MASK << shift,
+ SN_GPIO_MUX_OUTPUT << shift);
+ if (ret) {
+ clear_bit(offset, pdata->gchip_output);
+ pm_runtime_put_autosuspend(pdata->dev);
+ }
+
+ return ret;
+}
+
+static int ti_sn_bridge_gpio_request(struct gpio_chip *chip, unsigned int offset)
+{
+ struct ti_sn65dsi86 *pdata = gpiochip_get_data(chip);
+
+ if (offset == SN_PWM_GPIO_IDX)
+ return ti_sn_pwm_pin_request(pdata);
+
+ return 0;
+}
+
+static void ti_sn_bridge_gpio_free(struct gpio_chip *chip, unsigned int offset)
+{
+ struct ti_sn65dsi86 *pdata = gpiochip_get_data(chip);
+
+ /* We won't keep pm_runtime if we're input, so switch there on free */
+ ti_sn_bridge_gpio_direction_input(chip, offset);
+
+ if (offset == SN_PWM_GPIO_IDX)
+ ti_sn_pwm_pin_release(pdata);
+}
+
+static const char * const ti_sn_bridge_gpio_names[SN_NUM_GPIOS] = {
+ "GPIO1", "GPIO2", "GPIO3", "GPIO4"
+};
+
+static int ti_sn_gpio_probe(struct auxiliary_device *adev,
+ const struct auxiliary_device_id *id)
+{
+ struct ti_sn65dsi86 *pdata = dev_get_drvdata(adev->dev.parent);
+ int ret;
+
+ /* Only init if someone is going to use us as a GPIO controller */
+ if (!of_property_read_bool(pdata->dev->of_node, "gpio-controller"))
+ return 0;
+
+ pdata->gchip.label = dev_name(pdata->dev);
+ pdata->gchip.parent = pdata->dev;
+ pdata->gchip.owner = THIS_MODULE;
+ pdata->gchip.of_xlate = tn_sn_bridge_of_xlate;
+ pdata->gchip.of_gpio_n_cells = 2;
+ pdata->gchip.request = ti_sn_bridge_gpio_request;
+ pdata->gchip.free = ti_sn_bridge_gpio_free;
+ pdata->gchip.get_direction = ti_sn_bridge_gpio_get_direction;
+ pdata->gchip.direction_input = ti_sn_bridge_gpio_direction_input;
+ pdata->gchip.direction_output = ti_sn_bridge_gpio_direction_output;
+ pdata->gchip.get = ti_sn_bridge_gpio_get;
+ pdata->gchip.set = ti_sn_bridge_gpio_set;
+ pdata->gchip.can_sleep = true;
+ pdata->gchip.names = ti_sn_bridge_gpio_names;
+ pdata->gchip.ngpio = SN_NUM_GPIOS;
+ pdata->gchip.base = -1;
+ ret = devm_gpiochip_add_data(&adev->dev, &pdata->gchip, pdata);
+ if (ret)
+ dev_err(pdata->dev, "can't add gpio chip\n");
+
+ return ret;
+}
+
+static const struct auxiliary_device_id ti_sn_gpio_id_table[] = {
+ { .name = "ti_sn65dsi86.gpio", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(auxiliary, ti_sn_gpio_id_table);
+
+static struct auxiliary_driver ti_sn_gpio_driver = {
+ .name = "gpio",
+ .probe = ti_sn_gpio_probe,
+ .id_table = ti_sn_gpio_id_table,
+};
+
+static int __init ti_sn_gpio_register(void)
+{
+ return auxiliary_driver_register(&ti_sn_gpio_driver);
+}
+
+static void ti_sn_gpio_unregister(void)
+{
+ auxiliary_driver_unregister(&ti_sn_gpio_driver);
+}
+
+#else
+
+static inline int ti_sn_gpio_register(void) { return 0; }
+static inline void ti_sn_gpio_unregister(void) {}
+
+#endif
+
+/* -----------------------------------------------------------------------------
+ * Probe & Remove
+ */
+
+static void ti_sn65dsi86_runtime_disable(void *data)
+{
+ pm_runtime_dont_use_autosuspend(data);
+ pm_runtime_disable(data);
+}
+
+static int ti_sn65dsi86_parse_regulators(struct ti_sn65dsi86 *pdata)
+{
+ unsigned int i;
+ const char * const ti_sn_bridge_supply_names[] = {
+ "vcca", "vcc", "vccio", "vpll",
+ };
+
+ for (i = 0; i < SN_REGULATOR_SUPPLY_NUM; i++)
+ pdata->supplies[i].supply = ti_sn_bridge_supply_names[i];
+
+ return devm_regulator_bulk_get(pdata->dev, SN_REGULATOR_SUPPLY_NUM,
+ pdata->supplies);
+}
+
+static int ti_sn65dsi86_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct ti_sn65dsi86 *pdata;
+ int ret;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ DRM_ERROR("device doesn't support I2C\n");
+ return -ENODEV;
+ }
+
+ pdata = devm_kzalloc(dev, sizeof(struct ti_sn65dsi86), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+ dev_set_drvdata(dev, pdata);
+ pdata->dev = dev;
+
+ mutex_init(&pdata->comms_mutex);
+
+ pdata->regmap = devm_regmap_init_i2c(client,
+ &ti_sn65dsi86_regmap_config);
+ if (IS_ERR(pdata->regmap))
+ return dev_err_probe(dev, PTR_ERR(pdata->regmap),
+ "regmap i2c init failed\n");
+
+ pdata->enable_gpio = devm_gpiod_get_optional(dev, "enable",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(pdata->enable_gpio))
+ return dev_err_probe(dev, PTR_ERR(pdata->enable_gpio),
+ "failed to get enable gpio from DT\n");
+
+ ret = ti_sn65dsi86_parse_regulators(pdata);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to parse regulators\n");
+
+ pdata->refclk = devm_clk_get_optional(dev, "refclk");
+ if (IS_ERR(pdata->refclk))
+ return dev_err_probe(dev, PTR_ERR(pdata->refclk),
+ "failed to get reference clock\n");
+
+ pm_runtime_enable(dev);
+ pm_runtime_set_autosuspend_delay(pdata->dev, 500);
+ pm_runtime_use_autosuspend(pdata->dev);
+ ret = devm_add_action_or_reset(dev, ti_sn65dsi86_runtime_disable, dev);
+ if (ret)
+ return ret;
+
+ ti_sn65dsi86_debugfs_init(pdata);
+
+ /*
+ * Break ourselves up into a collection of aux devices. The only real
+ * motiviation here is to solve the chicken-and-egg problem of probe
+ * ordering. The bridge wants the panel to be there when it probes.
+ * The panel wants its HPD GPIO (provided by sn65dsi86 on some boards)
+ * when it probes. The panel and maybe backlight might want the DDC
+ * bus or the pwm_chip. Having sub-devices allows the some sub devices
+ * to finish probing even if others return -EPROBE_DEFER and gets us
+ * around the problems.
+ */
+
+ if (IS_ENABLED(CONFIG_OF_GPIO)) {
+ ret = ti_sn65dsi86_add_aux_device(pdata, &pdata->gpio_aux, "gpio");
+ if (ret)
+ return ret;
+ }
+
+ if (IS_ENABLED(CONFIG_PWM)) {
+ ret = ti_sn65dsi86_add_aux_device(pdata, &pdata->pwm_aux, "pwm");
+ if (ret)
+ return ret;
+ }
+
+ /*
+ * NOTE: At the end of the AUX channel probe we'll add the aux device
+ * for the bridge. This is because the bridge can't be used until the
+ * AUX channel is there and this is a very simple solution to the
+ * dependency problem.
+ */
+ return ti_sn65dsi86_add_aux_device(pdata, &pdata->aux_aux, "aux");
+}
+
+static struct i2c_device_id ti_sn65dsi86_id[] = {
+ { "ti,sn65dsi86", 0},
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, ti_sn65dsi86_id);
+
+static const struct of_device_id ti_sn65dsi86_match_table[] = {
+ {.compatible = "ti,sn65dsi86"},
+ {},
+};
+MODULE_DEVICE_TABLE(of, ti_sn65dsi86_match_table);
+
+static struct i2c_driver ti_sn65dsi86_driver = {
+ .driver = {
+ .name = "ti_sn65dsi86",
+ .of_match_table = ti_sn65dsi86_match_table,
+ .pm = &ti_sn65dsi86_pm_ops,
+ },
+ .probe = ti_sn65dsi86_probe,
+ .id_table = ti_sn65dsi86_id,
+};
+
+static int __init ti_sn65dsi86_init(void)
+{
+ int ret;
+
+ ret = i2c_add_driver(&ti_sn65dsi86_driver);
+ if (ret)
+ return ret;
+
+ ret = ti_sn_gpio_register();
+ if (ret)
+ goto err_main_was_registered;
+
+ ret = ti_sn_pwm_register();
+ if (ret)
+ goto err_gpio_was_registered;
+
+ ret = auxiliary_driver_register(&ti_sn_aux_driver);
+ if (ret)
+ goto err_pwm_was_registered;
+
+ ret = auxiliary_driver_register(&ti_sn_bridge_driver);
+ if (ret)
+ goto err_aux_was_registered;
+
+ return 0;
+
+err_aux_was_registered:
+ auxiliary_driver_unregister(&ti_sn_aux_driver);
+err_pwm_was_registered:
+ ti_sn_pwm_unregister();
+err_gpio_was_registered:
+ ti_sn_gpio_unregister();
+err_main_was_registered:
+ i2c_del_driver(&ti_sn65dsi86_driver);
+
+ return ret;
+}
+module_init(ti_sn65dsi86_init);
+
+static void __exit ti_sn65dsi86_exit(void)
+{
+ auxiliary_driver_unregister(&ti_sn_bridge_driver);
+ auxiliary_driver_unregister(&ti_sn_aux_driver);
+ ti_sn_pwm_unregister();
+ ti_sn_gpio_unregister();
+ i2c_del_driver(&ti_sn65dsi86_driver);
+}
+module_exit(ti_sn65dsi86_exit);
+
+MODULE_AUTHOR("Sandeep Panda <spanda@codeaurora.org>");
+MODULE_DESCRIPTION("sn65dsi86 DSI to eDP bridge driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c
new file mode 100644
index 000000000..b9635abba
--- /dev/null
+++ b/drivers/gpu/drm/bridge/ti-tfp410.c
@@ -0,0 +1,465 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2016 Texas Instruments
+ * Author: Jyri Sarha <jsarha@ti.com>
+ */
+
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/media-bus-format.h>
+#include <linux/module.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/workqueue.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#define HOTPLUG_DEBOUNCE_MS 1100
+
+struct tfp410 {
+ struct drm_bridge bridge;
+ struct drm_connector connector;
+
+ u32 bus_format;
+ struct delayed_work hpd_work;
+ struct gpio_desc *powerdown;
+
+ struct drm_bridge_timings timings;
+ struct drm_bridge *next_bridge;
+
+ struct device *dev;
+};
+
+static inline struct tfp410 *
+drm_bridge_to_tfp410(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct tfp410, bridge);
+}
+
+static inline struct tfp410 *
+drm_connector_to_tfp410(struct drm_connector *connector)
+{
+ return container_of(connector, struct tfp410, connector);
+}
+
+static int tfp410_get_modes(struct drm_connector *connector)
+{
+ struct tfp410 *dvi = drm_connector_to_tfp410(connector);
+ struct edid *edid;
+ int ret;
+
+ if (dvi->next_bridge->ops & DRM_BRIDGE_OP_EDID) {
+ edid = drm_bridge_get_edid(dvi->next_bridge, connector);
+ if (!edid)
+ DRM_INFO("EDID read failed. Fallback to standard modes\n");
+ } else {
+ edid = NULL;
+ }
+
+ if (!edid) {
+ /*
+ * No EDID, fallback on the XGA standard modes and prefer a mode
+ * pretty much anything can handle.
+ */
+ ret = drm_add_modes_noedid(connector, 1920, 1200);
+ drm_set_preferred_mode(connector, 1024, 768);
+ return ret;
+ }
+
+ drm_connector_update_edid_property(connector, edid);
+
+ ret = drm_add_edid_modes(connector, edid);
+
+ kfree(edid);
+
+ return ret;
+}
+
+static const struct drm_connector_helper_funcs tfp410_con_helper_funcs = {
+ .get_modes = tfp410_get_modes,
+};
+
+static enum drm_connector_status
+tfp410_connector_detect(struct drm_connector *connector, bool force)
+{
+ struct tfp410 *dvi = drm_connector_to_tfp410(connector);
+
+ return drm_bridge_detect(dvi->next_bridge);
+}
+
+static const struct drm_connector_funcs tfp410_con_funcs = {
+ .detect = tfp410_connector_detect,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static void tfp410_hpd_work_func(struct work_struct *work)
+{
+ struct tfp410 *dvi;
+
+ dvi = container_of(work, struct tfp410, hpd_work.work);
+
+ if (dvi->bridge.dev)
+ drm_helper_hpd_irq_event(dvi->bridge.dev);
+}
+
+static void tfp410_hpd_callback(void *arg, enum drm_connector_status status)
+{
+ struct tfp410 *dvi = arg;
+
+ mod_delayed_work(system_wq, &dvi->hpd_work,
+ msecs_to_jiffies(HOTPLUG_DEBOUNCE_MS));
+}
+
+static int tfp410_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct tfp410 *dvi = drm_bridge_to_tfp410(bridge);
+ int ret;
+
+ ret = drm_bridge_attach(bridge->encoder, dvi->next_bridge, bridge,
+ DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+ if (ret < 0)
+ return ret;
+
+ if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
+ return 0;
+
+ if (!bridge->encoder) {
+ dev_err(dvi->dev, "Missing encoder\n");
+ return -ENODEV;
+ }
+
+ if (dvi->next_bridge->ops & DRM_BRIDGE_OP_DETECT)
+ dvi->connector.polled = DRM_CONNECTOR_POLL_HPD;
+ else
+ dvi->connector.polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT;
+
+ if (dvi->next_bridge->ops & DRM_BRIDGE_OP_HPD) {
+ INIT_DELAYED_WORK(&dvi->hpd_work, tfp410_hpd_work_func);
+ drm_bridge_hpd_enable(dvi->next_bridge, tfp410_hpd_callback,
+ dvi);
+ }
+
+ drm_connector_helper_add(&dvi->connector,
+ &tfp410_con_helper_funcs);
+ ret = drm_connector_init_with_ddc(bridge->dev, &dvi->connector,
+ &tfp410_con_funcs,
+ dvi->next_bridge->type,
+ dvi->next_bridge->ddc);
+ if (ret) {
+ dev_err(dvi->dev, "drm_connector_init_with_ddc() failed: %d\n",
+ ret);
+ return ret;
+ }
+
+ drm_display_info_set_bus_formats(&dvi->connector.display_info,
+ &dvi->bus_format, 1);
+
+ drm_connector_attach_encoder(&dvi->connector, bridge->encoder);
+
+ return 0;
+}
+
+static void tfp410_detach(struct drm_bridge *bridge)
+{
+ struct tfp410 *dvi = drm_bridge_to_tfp410(bridge);
+
+ if (dvi->connector.dev && dvi->next_bridge->ops & DRM_BRIDGE_OP_HPD) {
+ drm_bridge_hpd_disable(dvi->next_bridge);
+ cancel_delayed_work_sync(&dvi->hpd_work);
+ }
+}
+
+static void tfp410_enable(struct drm_bridge *bridge)
+{
+ struct tfp410 *dvi = drm_bridge_to_tfp410(bridge);
+
+ gpiod_set_value_cansleep(dvi->powerdown, 0);
+}
+
+static void tfp410_disable(struct drm_bridge *bridge)
+{
+ struct tfp410 *dvi = drm_bridge_to_tfp410(bridge);
+
+ gpiod_set_value_cansleep(dvi->powerdown, 1);
+}
+
+static enum drm_mode_status tfp410_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ if (mode->clock < 25000)
+ return MODE_CLOCK_LOW;
+
+ if (mode->clock > 165000)
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
+}
+
+static const struct drm_bridge_funcs tfp410_bridge_funcs = {
+ .attach = tfp410_attach,
+ .detach = tfp410_detach,
+ .enable = tfp410_enable,
+ .disable = tfp410_disable,
+ .mode_valid = tfp410_mode_valid,
+};
+
+static const struct drm_bridge_timings tfp410_default_timings = {
+ .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE
+ | DRM_BUS_FLAG_DE_HIGH,
+ .setup_time_ps = 1200,
+ .hold_time_ps = 1300,
+};
+
+static int tfp410_parse_timings(struct tfp410 *dvi, bool i2c)
+{
+ struct drm_bridge_timings *timings = &dvi->timings;
+ struct device_node *ep;
+ u32 pclk_sample = 0;
+ u32 bus_width = 24;
+ u32 deskew = 0;
+
+ /* Start with defaults. */
+ *timings = tfp410_default_timings;
+
+ if (i2c)
+ /*
+ * In I2C mode timings are configured through the I2C interface.
+ * As the driver doesn't support I2C configuration yet, we just
+ * go with the defaults (BSEL=1, DSEL=1, DKEN=0, EDGE=1).
+ */
+ return 0;
+
+ /*
+ * In non-I2C mode, timings are configured through the BSEL, DSEL, DKEN
+ * and EDGE pins. They are specified in DT through endpoint properties
+ * and vendor-specific properties.
+ */
+ ep = of_graph_get_endpoint_by_regs(dvi->dev->of_node, 0, 0);
+ if (!ep)
+ return -EINVAL;
+
+ /* Get the sampling edge from the endpoint. */
+ of_property_read_u32(ep, "pclk-sample", &pclk_sample);
+ of_property_read_u32(ep, "bus-width", &bus_width);
+ of_node_put(ep);
+
+ timings->input_bus_flags = DRM_BUS_FLAG_DE_HIGH;
+
+ switch (pclk_sample) {
+ case 0:
+ timings->input_bus_flags |= DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE
+ | DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE;
+ break;
+ case 1:
+ timings->input_bus_flags |= DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE
+ | DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (bus_width) {
+ case 12:
+ dvi->bus_format = MEDIA_BUS_FMT_RGB888_2X12_LE;
+ break;
+ case 24:
+ dvi->bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Get the setup and hold time from vendor-specific properties. */
+ of_property_read_u32(dvi->dev->of_node, "ti,deskew", &deskew);
+ if (deskew > 7)
+ return -EINVAL;
+
+ timings->setup_time_ps = 1200 - 350 * ((s32)deskew - 4);
+ timings->hold_time_ps = max(0, 1300 + 350 * ((s32)deskew - 4));
+
+ return 0;
+}
+
+static int tfp410_init(struct device *dev, bool i2c)
+{
+ struct device_node *node;
+ struct tfp410 *dvi;
+ int ret;
+
+ if (!dev->of_node) {
+ dev_err(dev, "device-tree data is missing\n");
+ return -ENXIO;
+ }
+
+ dvi = devm_kzalloc(dev, sizeof(*dvi), GFP_KERNEL);
+ if (!dvi)
+ return -ENOMEM;
+
+ dvi->dev = dev;
+ dev_set_drvdata(dev, dvi);
+
+ dvi->bridge.funcs = &tfp410_bridge_funcs;
+ dvi->bridge.of_node = dev->of_node;
+ dvi->bridge.timings = &dvi->timings;
+ dvi->bridge.type = DRM_MODE_CONNECTOR_DVID;
+
+ ret = tfp410_parse_timings(dvi, i2c);
+ if (ret)
+ return ret;
+
+ /* Get the next bridge, connected to port@1. */
+ node = of_graph_get_remote_node(dev->of_node, 1, -1);
+ if (!node)
+ return -ENODEV;
+
+ dvi->next_bridge = of_drm_find_bridge(node);
+ of_node_put(node);
+
+ if (!dvi->next_bridge)
+ return -EPROBE_DEFER;
+
+ /* Get the powerdown GPIO. */
+ dvi->powerdown = devm_gpiod_get_optional(dev, "powerdown",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(dvi->powerdown)) {
+ dev_err(dev, "failed to parse powerdown gpio\n");
+ return PTR_ERR(dvi->powerdown);
+ }
+
+ /* Register the DRM bridge. */
+ drm_bridge_add(&dvi->bridge);
+
+ return 0;
+}
+
+static void tfp410_fini(struct device *dev)
+{
+ struct tfp410 *dvi = dev_get_drvdata(dev);
+
+ drm_bridge_remove(&dvi->bridge);
+}
+
+static int tfp410_probe(struct platform_device *pdev)
+{
+ return tfp410_init(&pdev->dev, false);
+}
+
+static int tfp410_remove(struct platform_device *pdev)
+{
+ tfp410_fini(&pdev->dev);
+
+ return 0;
+}
+
+static const struct of_device_id tfp410_match[] = {
+ { .compatible = "ti,tfp410" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, tfp410_match);
+
+static struct platform_driver tfp410_platform_driver = {
+ .probe = tfp410_probe,
+ .remove = tfp410_remove,
+ .driver = {
+ .name = "tfp410-bridge",
+ .of_match_table = tfp410_match,
+ },
+};
+
+#if IS_ENABLED(CONFIG_I2C)
+/* There is currently no i2c functionality. */
+static int tfp410_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int reg;
+
+ if (!client->dev.of_node ||
+ of_property_read_u32(client->dev.of_node, "reg", &reg)) {
+ dev_err(&client->dev,
+ "Can't get i2c reg property from device-tree\n");
+ return -ENXIO;
+ }
+
+ return tfp410_init(&client->dev, true);
+}
+
+static void tfp410_i2c_remove(struct i2c_client *client)
+{
+ tfp410_fini(&client->dev);
+}
+
+static const struct i2c_device_id tfp410_i2c_ids[] = {
+ { "tfp410", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tfp410_i2c_ids);
+
+static struct i2c_driver tfp410_i2c_driver = {
+ .driver = {
+ .name = "tfp410",
+ .of_match_table = of_match_ptr(tfp410_match),
+ },
+ .id_table = tfp410_i2c_ids,
+ .probe = tfp410_i2c_probe,
+ .remove = tfp410_i2c_remove,
+};
+#endif /* IS_ENABLED(CONFIG_I2C) */
+
+static struct {
+ uint i2c:1;
+ uint platform:1;
+} tfp410_registered_driver;
+
+static int __init tfp410_module_init(void)
+{
+ int ret;
+
+#if IS_ENABLED(CONFIG_I2C)
+ ret = i2c_add_driver(&tfp410_i2c_driver);
+ if (ret)
+ pr_err("%s: registering i2c driver failed: %d",
+ __func__, ret);
+ else
+ tfp410_registered_driver.i2c = 1;
+#endif
+
+ ret = platform_driver_register(&tfp410_platform_driver);
+ if (ret)
+ pr_err("%s: registering platform driver failed: %d",
+ __func__, ret);
+ else
+ tfp410_registered_driver.platform = 1;
+
+ if (tfp410_registered_driver.i2c ||
+ tfp410_registered_driver.platform)
+ return 0;
+
+ return ret;
+}
+module_init(tfp410_module_init);
+
+static void __exit tfp410_module_exit(void)
+{
+#if IS_ENABLED(CONFIG_I2C)
+ if (tfp410_registered_driver.i2c)
+ i2c_del_driver(&tfp410_i2c_driver);
+#endif
+ if (tfp410_registered_driver.platform)
+ platform_driver_unregister(&tfp410_platform_driver);
+}
+module_exit(tfp410_module_exit);
+
+MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
+MODULE_DESCRIPTION("TI TFP410 DVI bridge driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/bridge/ti-tpd12s015.c b/drivers/gpu/drm/bridge/ti-tpd12s015.c
new file mode 100644
index 000000000..b588fea12
--- /dev/null
+++ b/drivers/gpu/drm/bridge/ti-tpd12s015.c
@@ -0,0 +1,211 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * TPD12S015 HDMI ESD protection & level shifter chip driver
+ *
+ * Copyright (C) 2019 Texas Instruments Incorporated
+ *
+ * Based on the omapdrm-specific encoder-opa362 driver
+ *
+ * Copyright (C) 2013 Texas Instruments Incorporated
+ * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+
+#include <drm/drm_bridge.h>
+
+struct tpd12s015_device {
+ struct drm_bridge bridge;
+
+ struct gpio_desc *ct_cp_hpd_gpio;
+ struct gpio_desc *ls_oe_gpio;
+ struct gpio_desc *hpd_gpio;
+ int hpd_irq;
+
+ struct drm_bridge *next_bridge;
+};
+
+static inline struct tpd12s015_device *to_tpd12s015(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct tpd12s015_device, bridge);
+}
+
+static int tpd12s015_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct tpd12s015_device *tpd = to_tpd12s015(bridge);
+ int ret;
+
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
+ return -EINVAL;
+
+ ret = drm_bridge_attach(bridge->encoder, tpd->next_bridge,
+ bridge, flags);
+ if (ret < 0)
+ return ret;
+
+ gpiod_set_value_cansleep(tpd->ls_oe_gpio, 1);
+
+ /* DC-DC converter needs at max 300us to get to 90% of 5V. */
+ usleep_range(300, 1000);
+
+ return 0;
+}
+
+static void tpd12s015_detach(struct drm_bridge *bridge)
+{
+ struct tpd12s015_device *tpd = to_tpd12s015(bridge);
+
+ gpiod_set_value_cansleep(tpd->ls_oe_gpio, 0);
+}
+
+static enum drm_connector_status tpd12s015_detect(struct drm_bridge *bridge)
+{
+ struct tpd12s015_device *tpd = to_tpd12s015(bridge);
+
+ if (gpiod_get_value_cansleep(tpd->hpd_gpio))
+ return connector_status_connected;
+ else
+ return connector_status_disconnected;
+}
+
+static void tpd12s015_hpd_enable(struct drm_bridge *bridge)
+{
+ struct tpd12s015_device *tpd = to_tpd12s015(bridge);
+
+ gpiod_set_value_cansleep(tpd->ct_cp_hpd_gpio, 1);
+}
+
+static void tpd12s015_hpd_disable(struct drm_bridge *bridge)
+{
+ struct tpd12s015_device *tpd = to_tpd12s015(bridge);
+
+ gpiod_set_value_cansleep(tpd->ct_cp_hpd_gpio, 0);
+}
+
+static const struct drm_bridge_funcs tpd12s015_bridge_funcs = {
+ .attach = tpd12s015_attach,
+ .detach = tpd12s015_detach,
+ .detect = tpd12s015_detect,
+ .hpd_enable = tpd12s015_hpd_enable,
+ .hpd_disable = tpd12s015_hpd_disable,
+};
+
+static irqreturn_t tpd12s015_hpd_isr(int irq, void *data)
+{
+ struct tpd12s015_device *tpd = data;
+ struct drm_bridge *bridge = &tpd->bridge;
+
+ drm_bridge_hpd_notify(bridge, tpd12s015_detect(bridge));
+
+ return IRQ_HANDLED;
+}
+
+static int tpd12s015_probe(struct platform_device *pdev)
+{
+ struct tpd12s015_device *tpd;
+ struct device_node *node;
+ struct gpio_desc *gpio;
+ int ret;
+
+ tpd = devm_kzalloc(&pdev->dev, sizeof(*tpd), GFP_KERNEL);
+ if (!tpd)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, tpd);
+
+ tpd->bridge.funcs = &tpd12s015_bridge_funcs;
+ tpd->bridge.of_node = pdev->dev.of_node;
+ tpd->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
+ tpd->bridge.ops = DRM_BRIDGE_OP_DETECT;
+
+ /* Get the next bridge, connected to port@1. */
+ node = of_graph_get_remote_node(pdev->dev.of_node, 1, -1);
+ if (!node)
+ return -ENODEV;
+
+ tpd->next_bridge = of_drm_find_bridge(node);
+ of_node_put(node);
+
+ if (!tpd->next_bridge)
+ return -EPROBE_DEFER;
+
+ /* Get the control and HPD GPIOs. */
+ gpio = devm_gpiod_get_index_optional(&pdev->dev, NULL, 0,
+ GPIOD_OUT_LOW);
+ if (IS_ERR(gpio))
+ return PTR_ERR(gpio);
+
+ tpd->ct_cp_hpd_gpio = gpio;
+
+ gpio = devm_gpiod_get_index_optional(&pdev->dev, NULL, 1,
+ GPIOD_OUT_LOW);
+ if (IS_ERR(gpio))
+ return PTR_ERR(gpio);
+
+ tpd->ls_oe_gpio = gpio;
+
+ gpio = devm_gpiod_get_index(&pdev->dev, NULL, 2, GPIOD_IN);
+ if (IS_ERR(gpio))
+ return PTR_ERR(gpio);
+
+ tpd->hpd_gpio = gpio;
+
+ /* Register the IRQ if the HPD GPIO is IRQ-capable. */
+ tpd->hpd_irq = gpiod_to_irq(tpd->hpd_gpio);
+ if (tpd->hpd_irq >= 0) {
+ ret = devm_request_threaded_irq(&pdev->dev, tpd->hpd_irq, NULL,
+ tpd12s015_hpd_isr,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "tpd12s015 hpd", tpd);
+ if (ret)
+ return ret;
+
+ tpd->bridge.ops |= DRM_BRIDGE_OP_HPD;
+ }
+
+ /* Register the DRM bridge. */
+ drm_bridge_add(&tpd->bridge);
+
+ return 0;
+}
+
+static int tpd12s015_remove(struct platform_device *pdev)
+{
+ struct tpd12s015_device *tpd = platform_get_drvdata(pdev);
+
+ drm_bridge_remove(&tpd->bridge);
+
+ return 0;
+}
+
+static const struct of_device_id tpd12s015_of_match[] = {
+ { .compatible = "ti,tpd12s015", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, tpd12s015_of_match);
+
+static struct platform_driver tpd12s015_driver = {
+ .probe = tpd12s015_probe,
+ .remove = tpd12s015_remove,
+ .driver = {
+ .name = "tpd12s015",
+ .of_match_table = tpd12s015_of_match,
+ },
+};
+
+module_platform_driver(tpd12s015_driver);
+
+MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
+MODULE_DESCRIPTION("TPD12S015 HDMI level shifter and ESD protection driver");
+MODULE_LICENSE("GPL");