summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/bridge/analogix
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/bridge/analogix')
-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
14 files changed, 10232 insertions, 0 deletions
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__ */