diff options
Diffstat (limited to 'drivers/gpu/drm/tiny')
| -rw-r--r-- | drivers/gpu/drm/tiny/Kconfig | 201 | ||||
| -rw-r--r-- | drivers/gpu/drm/tiny/Makefile | 17 | ||||
| -rw-r--r-- | drivers/gpu/drm/tiny/arcpgu.c | 437 | ||||
| -rw-r--r-- | drivers/gpu/drm/tiny/bochs.c | 735 | ||||
| -rw-r--r-- | drivers/gpu/drm/tiny/cirrus.c | 645 | ||||
| -rw-r--r-- | drivers/gpu/drm/tiny/gm12u320.c | 759 | ||||
| -rw-r--r-- | drivers/gpu/drm/tiny/hx8357d.c | 294 | ||||
| -rw-r--r-- | drivers/gpu/drm/tiny/ili9163.c | 224 | ||||
| -rw-r--r-- | drivers/gpu/drm/tiny/ili9225.c | 443 | ||||
| -rw-r--r-- | drivers/gpu/drm/tiny/ili9341.c | 256 | ||||
| -rw-r--r-- | drivers/gpu/drm/tiny/ili9486.c | 279 | ||||
| -rw-r--r-- | drivers/gpu/drm/tiny/mi0283qt.c | 282 | ||||
| -rw-r--r-- | drivers/gpu/drm/tiny/panel-mipi-dbi.c | 397 | ||||
| -rw-r--r-- | drivers/gpu/drm/tiny/repaper.c | 1149 | ||||
| -rw-r--r-- | drivers/gpu/drm/tiny/simpledrm.c | 882 | ||||
| -rw-r--r-- | drivers/gpu/drm/tiny/st7586.c | 395 | ||||
| -rw-r--r-- | drivers/gpu/drm/tiny/st7735r.c | 279 |
17 files changed, 7674 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tiny/Kconfig b/drivers/gpu/drm/tiny/Kconfig new file mode 100644 index 000000000..565957264 --- /dev/null +++ b/drivers/gpu/drm/tiny/Kconfig @@ -0,0 +1,201 @@ +# SPDX-License-Identifier: GPL-2.0-only + +config DRM_ARCPGU + tristate "ARC PGU" + depends on DRM && OF + select DRM_GEM_DMA_HELPER + select DRM_KMS_HELPER + help + Choose this option if you have an ARC PGU controller. + + If M is selected the module will be called arcpgu. + +config DRM_BOCHS + tristate "DRM Support for bochs dispi vga interface (qemu stdvga)" + depends on DRM && PCI && MMU + select DRM_KMS_HELPER + select DRM_VRAM_HELPER + select DRM_TTM + select DRM_TTM_HELPER + help + This is a KMS driver for qemu's stdvga output. Choose this option + for qemu. + + If M is selected the module will be called bochs. + +config DRM_CIRRUS_QEMU + tristate "Cirrus driver for QEMU emulated device" + depends on DRM && PCI && MMU + select DRM_KMS_HELPER + select DRM_GEM_SHMEM_HELPER + help + This is a KMS driver for emulated cirrus device in qemu. + It is *NOT* intended for real cirrus devices. This requires + the modesetting userspace X.org driver. + + Cirrus is obsolete, the hardware was designed in the 90ies + and can't keep up with todays needs. More background: + https://www.kraxel.org/blog/2014/10/qemu-using-cirrus-considered-harmful/ + + Better alternatives are: + - stdvga (DRM_BOCHS, qemu -vga std, default in qemu 2.2+) + - qxl (DRM_QXL, qemu -vga qxl, works best with spice) + - virtio (DRM_VIRTIO_GPU), qemu -vga virtio) + +config DRM_GM12U320 + tristate "GM12U320 driver for USB projectors" + depends on DRM && USB && MMU + select DRM_KMS_HELPER + select DRM_GEM_SHMEM_HELPER + help + This is a KMS driver for projectors which use the GM12U320 chipset + for video transfer over USB2/3, such as the Acer C120 mini projector. + +config DRM_PANEL_MIPI_DBI + tristate "DRM support for MIPI DBI compatible panels" + depends on DRM && SPI + select DRM_KMS_HELPER + select DRM_GEM_DMA_HELPER + select DRM_MIPI_DBI + select BACKLIGHT_CLASS_DEVICE + select VIDEOMODE_HELPERS + help + Say Y here if you want to enable support for MIPI DBI compatible + panels. The controller command setup can be provided using a + firmware file. For more information see + https://github.com/notro/panel-mipi-dbi/wiki. + To compile this driver as a module, choose M here. + +config DRM_SIMPLEDRM + tristate "Simple framebuffer driver" + depends on DRM && MMU + select APERTURE_HELPERS + select DRM_GEM_SHMEM_HELPER + select DRM_KMS_HELPER + help + DRM driver for simple platform-provided framebuffers. + + This driver assumes that the display hardware has been initialized + by the firmware or bootloader before the kernel boots. Scanout + buffer, size, and display format must be provided via device tree, + UEFI, VESA, etc. + + On x86 BIOS or UEFI systems, you should also select SYSFB_SIMPLEFB + to use UEFI and VESA framebuffers. + +config TINYDRM_HX8357D + tristate "DRM support for HX8357D display panels" + depends on DRM && SPI + select DRM_KMS_HELPER + select DRM_GEM_DMA_HELPER + select DRM_MIPI_DBI + select BACKLIGHT_CLASS_DEVICE + help + DRM driver for the following HX8357D panels: + * YX350HV15-T 3.5" 340x350 TFT (Adafruit 3.5") + + If M is selected the module will be called hx8357d. + +config TINYDRM_ILI9163 + tristate "DRM support for ILI9163 display panels" + depends on DRM && SPI + select BACKLIGHT_CLASS_DEVICE + select DRM_GEM_DMA_HELPER + select DRM_KMS_HELPER + select DRM_MIPI_DBI + help + DRM driver for the following Ilitek ILI9163 panels: + * NHD-1.8-128160EF 128x160 TFT + + If M is selected the module will be called ili9163. + +config TINYDRM_ILI9225 + tristate "DRM support for ILI9225 display panels" + depends on DRM && SPI + select DRM_KMS_HELPER + select DRM_GEM_DMA_HELPER + select DRM_MIPI_DBI + help + DRM driver for the following Ilitek ILI9225 panels: + * No-name 2.2" color screen module + + If M is selected the module will be called ili9225. + +config TINYDRM_ILI9341 + tristate "DRM support for ILI9341 display panels" + depends on DRM && SPI + select DRM_KMS_HELPER + select DRM_GEM_DMA_HELPER + select DRM_MIPI_DBI + select BACKLIGHT_CLASS_DEVICE + help + DRM driver for the following Ilitek ILI9341 panels: + * YX240QV29-T 2.4" 240x320 TFT (Adafruit 2.4") + + If M is selected the module will be called ili9341. + +config TINYDRM_ILI9486 + tristate "DRM support for ILI9486 display panels" + depends on DRM && SPI + select DRM_KMS_HELPER + select DRM_GEM_DMA_HELPER + select DRM_MIPI_DBI + select BACKLIGHT_CLASS_DEVICE + help + DRM driver for the following Ilitek ILI9486 panels: + * PISCREEN 3.5" 320x480 TFT (Ozzmaker 3.5") + * RPILCD 3.5" 320x480 TFT (Waveshare 3.5") + + If M is selected the module will be called ili9486. + +config TINYDRM_MI0283QT + tristate "DRM support for MI0283QT" + depends on DRM && SPI + select DRM_KMS_HELPER + select DRM_GEM_DMA_HELPER + select DRM_MIPI_DBI + select BACKLIGHT_CLASS_DEVICE + help + DRM driver for the Multi-Inno MI0283QT display panel + If M is selected the module will be called mi0283qt. + +config TINYDRM_REPAPER + tristate "DRM support for Pervasive Displays RePaper panels (V231)" + depends on DRM && SPI + select DRM_KMS_HELPER + select DRM_GEM_DMA_HELPER + help + DRM driver for the following Pervasive Displays panels: + 1.44" TFT EPD Panel (E1144CS021) + 1.90" TFT EPD Panel (E1190CS021) + 2.00" TFT EPD Panel (E2200CS021) + 2.71" TFT EPD Panel (E2271CS021) + + If M is selected the module will be called repaper. + +config TINYDRM_ST7586 + tristate "DRM support for Sitronix ST7586 display panels" + depends on DRM && SPI + select DRM_KMS_HELPER + select DRM_GEM_DMA_HELPER + select DRM_MIPI_DBI + help + DRM driver for the following Sitronix ST7586 panels: + * LEGO MINDSTORMS EV3 + + If M is selected the module will be called st7586. + +config TINYDRM_ST7735R + tristate "DRM support for Sitronix ST7715R/ST7735R display panels" + depends on DRM && SPI + select DRM_KMS_HELPER + select DRM_GEM_DMA_HELPER + select DRM_MIPI_DBI + select BACKLIGHT_CLASS_DEVICE + help + DRM driver for Sitronix ST7715R/ST7735R with one of the following + LCDs: + * Jianda JD-T18003-T01 1.8" 128x160 TFT + * Okaya RH128128T 1.44" 128x128 TFT + + If M is selected the module will be called st7735r. diff --git a/drivers/gpu/drm/tiny/Makefile b/drivers/gpu/drm/tiny/Makefile new file mode 100644 index 000000000..1d9d6227e --- /dev/null +++ b/drivers/gpu/drm/tiny/Makefile @@ -0,0 +1,17 @@ +# SPDX-License-Identifier: GPL-2.0-only + +obj-$(CONFIG_DRM_ARCPGU) += arcpgu.o +obj-$(CONFIG_DRM_BOCHS) += bochs.o +obj-$(CONFIG_DRM_CIRRUS_QEMU) += cirrus.o +obj-$(CONFIG_DRM_GM12U320) += gm12u320.o +obj-$(CONFIG_DRM_PANEL_MIPI_DBI) += panel-mipi-dbi.o +obj-$(CONFIG_DRM_SIMPLEDRM) += simpledrm.o +obj-$(CONFIG_TINYDRM_HX8357D) += hx8357d.o +obj-$(CONFIG_TINYDRM_ILI9163) += ili9163.o +obj-$(CONFIG_TINYDRM_ILI9225) += ili9225.o +obj-$(CONFIG_TINYDRM_ILI9341) += ili9341.o +obj-$(CONFIG_TINYDRM_ILI9486) += ili9486.o +obj-$(CONFIG_TINYDRM_MI0283QT) += mi0283qt.o +obj-$(CONFIG_TINYDRM_REPAPER) += repaper.o +obj-$(CONFIG_TINYDRM_ST7586) += st7586.o +obj-$(CONFIG_TINYDRM_ST7735R) += st7735r.o diff --git a/drivers/gpu/drm/tiny/arcpgu.c b/drivers/gpu/drm/tiny/arcpgu.c new file mode 100644 index 000000000..bb302a3fd --- /dev/null +++ b/drivers/gpu/drm/tiny/arcpgu.c @@ -0,0 +1,437 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * ARC PGU DRM driver. + * + * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com) + */ + +#include <linux/clk.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_debugfs.h> +#include <drm/drm_device.h> +#include <drm/drm_drv.h> +#include <drm/drm_edid.h> +#include <drm/drm_fb_dma_helper.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_fourcc.h> +#include <drm/drm_framebuffer.h> +#include <drm/drm_gem_dma_helper.h> +#include <drm/drm_gem_framebuffer_helper.h> +#include <drm/drm_module.h> +#include <drm/drm_of.h> +#include <drm/drm_probe_helper.h> +#include <drm/drm_simple_kms_helper.h> +#include <linux/dma-mapping.h> +#include <linux/module.h> +#include <linux/of_reserved_mem.h> +#include <linux/platform_device.h> + +#define ARCPGU_REG_CTRL 0x00 +#define ARCPGU_REG_STAT 0x04 +#define ARCPGU_REG_FMT 0x10 +#define ARCPGU_REG_HSYNC 0x14 +#define ARCPGU_REG_VSYNC 0x18 +#define ARCPGU_REG_ACTIVE 0x1c +#define ARCPGU_REG_BUF0_ADDR 0x40 +#define ARCPGU_REG_STRIDE 0x50 +#define ARCPGU_REG_START_SET 0x84 + +#define ARCPGU_REG_ID 0x3FC + +#define ARCPGU_CTRL_ENABLE_MASK 0x02 +#define ARCPGU_CTRL_VS_POL_MASK 0x1 +#define ARCPGU_CTRL_VS_POL_OFST 0x3 +#define ARCPGU_CTRL_HS_POL_MASK 0x1 +#define ARCPGU_CTRL_HS_POL_OFST 0x4 +#define ARCPGU_MODE_XRGB8888 BIT(2) +#define ARCPGU_STAT_BUSY_MASK 0x02 + +struct arcpgu_drm_private { + struct drm_device drm; + void __iomem *regs; + struct clk *clk; + struct drm_simple_display_pipe pipe; + struct drm_connector sim_conn; +}; + +#define dev_to_arcpgu(x) container_of(x, struct arcpgu_drm_private, drm) + +#define pipe_to_arcpgu_priv(x) container_of(x, struct arcpgu_drm_private, pipe) + +static inline void arc_pgu_write(struct arcpgu_drm_private *arcpgu, + unsigned int reg, u32 value) +{ + iowrite32(value, arcpgu->regs + reg); +} + +static inline u32 arc_pgu_read(struct arcpgu_drm_private *arcpgu, + unsigned int reg) +{ + return ioread32(arcpgu->regs + reg); +} + +#define XRES_DEF 640 +#define YRES_DEF 480 + +#define XRES_MAX 8192 +#define YRES_MAX 8192 + +static int arcpgu_drm_connector_get_modes(struct drm_connector *connector) +{ + int count; + + count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX); + drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF); + return count; +} + +static const struct drm_connector_helper_funcs +arcpgu_drm_connector_helper_funcs = { + .get_modes = arcpgu_drm_connector_get_modes, +}; + +static const struct drm_connector_funcs arcpgu_drm_connector_funcs = { + .reset = drm_atomic_helper_connector_reset, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = drm_connector_cleanup, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static int arcpgu_drm_sim_init(struct drm_device *drm, struct drm_connector *connector) +{ + drm_connector_helper_add(connector, &arcpgu_drm_connector_helper_funcs); + return drm_connector_init(drm, connector, &arcpgu_drm_connector_funcs, + DRM_MODE_CONNECTOR_VIRTUAL); +} + +#define ENCODE_PGU_XY(x, y) ((((x) - 1) << 16) | ((y) - 1)) + +static const u32 arc_pgu_supported_formats[] = { + DRM_FORMAT_RGB565, + DRM_FORMAT_XRGB8888, + DRM_FORMAT_ARGB8888, +}; + +static void arc_pgu_set_pxl_fmt(struct arcpgu_drm_private *arcpgu) +{ + const struct drm_framebuffer *fb = arcpgu->pipe.plane.state->fb; + uint32_t pixel_format = fb->format->format; + u32 format = DRM_FORMAT_INVALID; + int i; + u32 reg_ctrl; + + for (i = 0; i < ARRAY_SIZE(arc_pgu_supported_formats); i++) { + if (arc_pgu_supported_formats[i] == pixel_format) + format = arc_pgu_supported_formats[i]; + } + + if (WARN_ON(format == DRM_FORMAT_INVALID)) + return; + + reg_ctrl = arc_pgu_read(arcpgu, ARCPGU_REG_CTRL); + if (format == DRM_FORMAT_RGB565) + reg_ctrl &= ~ARCPGU_MODE_XRGB8888; + else + reg_ctrl |= ARCPGU_MODE_XRGB8888; + arc_pgu_write(arcpgu, ARCPGU_REG_CTRL, reg_ctrl); +} + +static enum drm_mode_status arc_pgu_mode_valid(struct drm_simple_display_pipe *pipe, + const struct drm_display_mode *mode) +{ + struct arcpgu_drm_private *arcpgu = pipe_to_arcpgu_priv(pipe); + long rate, clk_rate = mode->clock * 1000; + long diff = clk_rate / 200; /* +-0.5% allowed by HDMI spec */ + + rate = clk_round_rate(arcpgu->clk, clk_rate); + if ((max(rate, clk_rate) - min(rate, clk_rate) < diff) && (rate > 0)) + return MODE_OK; + + return MODE_NOCLOCK; +} + +static void arc_pgu_mode_set(struct arcpgu_drm_private *arcpgu) +{ + struct drm_display_mode *m = &arcpgu->pipe.crtc.state->adjusted_mode; + u32 val; + + arc_pgu_write(arcpgu, ARCPGU_REG_FMT, + ENCODE_PGU_XY(m->crtc_htotal, m->crtc_vtotal)); + + arc_pgu_write(arcpgu, ARCPGU_REG_HSYNC, + ENCODE_PGU_XY(m->crtc_hsync_start - m->crtc_hdisplay, + m->crtc_hsync_end - m->crtc_hdisplay)); + + arc_pgu_write(arcpgu, ARCPGU_REG_VSYNC, + ENCODE_PGU_XY(m->crtc_vsync_start - m->crtc_vdisplay, + m->crtc_vsync_end - m->crtc_vdisplay)); + + arc_pgu_write(arcpgu, ARCPGU_REG_ACTIVE, + ENCODE_PGU_XY(m->crtc_hblank_end - m->crtc_hblank_start, + m->crtc_vblank_end - m->crtc_vblank_start)); + + val = arc_pgu_read(arcpgu, ARCPGU_REG_CTRL); + + if (m->flags & DRM_MODE_FLAG_PVSYNC) + val |= ARCPGU_CTRL_VS_POL_MASK << ARCPGU_CTRL_VS_POL_OFST; + else + val &= ~(ARCPGU_CTRL_VS_POL_MASK << ARCPGU_CTRL_VS_POL_OFST); + + if (m->flags & DRM_MODE_FLAG_PHSYNC) + val |= ARCPGU_CTRL_HS_POL_MASK << ARCPGU_CTRL_HS_POL_OFST; + else + val &= ~(ARCPGU_CTRL_HS_POL_MASK << ARCPGU_CTRL_HS_POL_OFST); + + arc_pgu_write(arcpgu, ARCPGU_REG_CTRL, val); + arc_pgu_write(arcpgu, ARCPGU_REG_STRIDE, 0); + arc_pgu_write(arcpgu, ARCPGU_REG_START_SET, 1); + + arc_pgu_set_pxl_fmt(arcpgu); + + clk_set_rate(arcpgu->clk, m->crtc_clock * 1000); +} + +static void arc_pgu_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state, + struct drm_plane_state *plane_state) +{ + struct arcpgu_drm_private *arcpgu = pipe_to_arcpgu_priv(pipe); + + arc_pgu_mode_set(arcpgu); + + clk_prepare_enable(arcpgu->clk); + arc_pgu_write(arcpgu, ARCPGU_REG_CTRL, + arc_pgu_read(arcpgu, ARCPGU_REG_CTRL) | + ARCPGU_CTRL_ENABLE_MASK); +} + +static void arc_pgu_disable(struct drm_simple_display_pipe *pipe) +{ + struct arcpgu_drm_private *arcpgu = pipe_to_arcpgu_priv(pipe); + + clk_disable_unprepare(arcpgu->clk); + arc_pgu_write(arcpgu, ARCPGU_REG_CTRL, + arc_pgu_read(arcpgu, ARCPGU_REG_CTRL) & + ~ARCPGU_CTRL_ENABLE_MASK); +} + +static void arc_pgu_update(struct drm_simple_display_pipe *pipe, + struct drm_plane_state *state) +{ + struct arcpgu_drm_private *arcpgu; + struct drm_gem_dma_object *gem; + + if (!pipe->plane.state->fb) + return; + + arcpgu = pipe_to_arcpgu_priv(pipe); + gem = drm_fb_dma_get_gem_obj(pipe->plane.state->fb, 0); + arc_pgu_write(arcpgu, ARCPGU_REG_BUF0_ADDR, gem->dma_addr); +} + +static const struct drm_simple_display_pipe_funcs arc_pgu_pipe_funcs = { + .update = arc_pgu_update, + .mode_valid = arc_pgu_mode_valid, + .enable = arc_pgu_enable, + .disable = arc_pgu_disable, +}; + +static const struct drm_mode_config_funcs arcpgu_drm_modecfg_funcs = { + .fb_create = drm_gem_fb_create, + .atomic_check = drm_atomic_helper_check, + .atomic_commit = drm_atomic_helper_commit, +}; + +DEFINE_DRM_GEM_DMA_FOPS(arcpgu_drm_ops); + +static int arcpgu_load(struct arcpgu_drm_private *arcpgu) +{ + struct platform_device *pdev = to_platform_device(arcpgu->drm.dev); + struct device_node *encoder_node = NULL, *endpoint_node = NULL; + struct drm_connector *connector = NULL; + struct drm_device *drm = &arcpgu->drm; + struct resource *res; + int ret; + + arcpgu->clk = devm_clk_get(drm->dev, "pxlclk"); + if (IS_ERR(arcpgu->clk)) + return PTR_ERR(arcpgu->clk); + + ret = drmm_mode_config_init(drm); + if (ret) + return ret; + + drm->mode_config.min_width = 0; + drm->mode_config.min_height = 0; + drm->mode_config.max_width = 1920; + drm->mode_config.max_height = 1080; + drm->mode_config.funcs = &arcpgu_drm_modecfg_funcs; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + arcpgu->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(arcpgu->regs)) + return PTR_ERR(arcpgu->regs); + + dev_info(drm->dev, "arc_pgu ID: 0x%x\n", + arc_pgu_read(arcpgu, ARCPGU_REG_ID)); + + /* Get the optional framebuffer memory resource */ + ret = of_reserved_mem_device_init(drm->dev); + if (ret && ret != -ENODEV) + return ret; + + if (dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32))) + return -ENODEV; + + /* + * There is only one output port inside each device. It is linked with + * encoder endpoint. + */ + endpoint_node = of_graph_get_next_endpoint(pdev->dev.of_node, NULL); + if (endpoint_node) { + encoder_node = of_graph_get_remote_port_parent(endpoint_node); + of_node_put(endpoint_node); + } else { + connector = &arcpgu->sim_conn; + dev_info(drm->dev, "no encoder found. Assumed virtual LCD on simulation platform\n"); + ret = arcpgu_drm_sim_init(drm, connector); + if (ret < 0) + return ret; + } + + ret = drm_simple_display_pipe_init(drm, &arcpgu->pipe, &arc_pgu_pipe_funcs, + arc_pgu_supported_formats, + ARRAY_SIZE(arc_pgu_supported_formats), + NULL, connector); + if (ret) + return ret; + + if (encoder_node) { + struct drm_bridge *bridge; + + /* Locate drm bridge from the hdmi encoder DT node */ + bridge = of_drm_find_bridge(encoder_node); + if (!bridge) + return -EPROBE_DEFER; + + ret = drm_simple_display_pipe_attach_bridge(&arcpgu->pipe, bridge); + if (ret) + return ret; + } + + drm_mode_config_reset(drm); + drm_kms_helper_poll_init(drm); + + platform_set_drvdata(pdev, drm); + return 0; +} + +static int arcpgu_unload(struct drm_device *drm) +{ + drm_kms_helper_poll_fini(drm); + drm_atomic_helper_shutdown(drm); + + return 0; +} + +#ifdef CONFIG_DEBUG_FS +static int arcpgu_show_pxlclock(struct seq_file *m, void *arg) +{ + struct drm_info_node *node = (struct drm_info_node *)m->private; + struct drm_device *drm = node->minor->dev; + struct arcpgu_drm_private *arcpgu = dev_to_arcpgu(drm); + unsigned long clkrate = clk_get_rate(arcpgu->clk); + unsigned long mode_clock = arcpgu->pipe.crtc.mode.crtc_clock * 1000; + + seq_printf(m, "hw : %lu\n", clkrate); + seq_printf(m, "mode: %lu\n", mode_clock); + return 0; +} + +static struct drm_info_list arcpgu_debugfs_list[] = { + { "clocks", arcpgu_show_pxlclock, 0 }, +}; + +static void arcpgu_debugfs_init(struct drm_minor *minor) +{ + drm_debugfs_create_files(arcpgu_debugfs_list, + ARRAY_SIZE(arcpgu_debugfs_list), + minor->debugfs_root, minor); +} +#endif + +static const struct drm_driver arcpgu_drm_driver = { + .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC, + .name = "arcpgu", + .desc = "ARC PGU Controller", + .date = "20160219", + .major = 1, + .minor = 0, + .patchlevel = 0, + .fops = &arcpgu_drm_ops, + DRM_GEM_DMA_DRIVER_OPS, +#ifdef CONFIG_DEBUG_FS + .debugfs_init = arcpgu_debugfs_init, +#endif +}; + +static int arcpgu_probe(struct platform_device *pdev) +{ + struct arcpgu_drm_private *arcpgu; + int ret; + + arcpgu = devm_drm_dev_alloc(&pdev->dev, &arcpgu_drm_driver, + struct arcpgu_drm_private, drm); + if (IS_ERR(arcpgu)) + return PTR_ERR(arcpgu); + + ret = arcpgu_load(arcpgu); + if (ret) + return ret; + + ret = drm_dev_register(&arcpgu->drm, 0); + if (ret) + goto err_unload; + + drm_fbdev_generic_setup(&arcpgu->drm, 16); + + return 0; + +err_unload: + arcpgu_unload(&arcpgu->drm); + + return ret; +} + +static int arcpgu_remove(struct platform_device *pdev) +{ + struct drm_device *drm = platform_get_drvdata(pdev); + + drm_dev_unregister(drm); + arcpgu_unload(drm); + + return 0; +} + +static const struct of_device_id arcpgu_of_table[] = { + {.compatible = "snps,arcpgu"}, + {} +}; + +MODULE_DEVICE_TABLE(of, arcpgu_of_table); + +static struct platform_driver arcpgu_platform_driver = { + .probe = arcpgu_probe, + .remove = arcpgu_remove, + .driver = { + .name = "arcpgu", + .of_match_table = arcpgu_of_table, + }, +}; + +drm_module_platform_driver(arcpgu_platform_driver); + +MODULE_AUTHOR("Carlos Palminha <palminha@synopsys.com>"); +MODULE_DESCRIPTION("ARC PGU DRM driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/tiny/bochs.c b/drivers/gpu/drm/tiny/bochs.c new file mode 100644 index 000000000..a51262289 --- /dev/null +++ b/drivers/gpu/drm/tiny/bochs.c @@ -0,0 +1,735 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#include <linux/module.h> +#include <linux/pci.h> + +#include <drm/drm_aperture.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_edid.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_fourcc.h> +#include <drm/drm_framebuffer.h> +#include <drm/drm_gem_framebuffer_helper.h> +#include <drm/drm_gem_vram_helper.h> +#include <drm/drm_managed.h> +#include <drm/drm_module.h> +#include <drm/drm_probe_helper.h> +#include <drm/drm_simple_kms_helper.h> + +#include <video/vga.h> + +/* ---------------------------------------------------------------------- */ + +#define VBE_DISPI_IOPORT_INDEX 0x01CE +#define VBE_DISPI_IOPORT_DATA 0x01CF + +#define VBE_DISPI_INDEX_ID 0x0 +#define VBE_DISPI_INDEX_XRES 0x1 +#define VBE_DISPI_INDEX_YRES 0x2 +#define VBE_DISPI_INDEX_BPP 0x3 +#define VBE_DISPI_INDEX_ENABLE 0x4 +#define VBE_DISPI_INDEX_BANK 0x5 +#define VBE_DISPI_INDEX_VIRT_WIDTH 0x6 +#define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7 +#define VBE_DISPI_INDEX_X_OFFSET 0x8 +#define VBE_DISPI_INDEX_Y_OFFSET 0x9 +#define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa + +#define VBE_DISPI_ID0 0xB0C0 +#define VBE_DISPI_ID1 0xB0C1 +#define VBE_DISPI_ID2 0xB0C2 +#define VBE_DISPI_ID3 0xB0C3 +#define VBE_DISPI_ID4 0xB0C4 +#define VBE_DISPI_ID5 0xB0C5 + +#define VBE_DISPI_DISABLED 0x00 +#define VBE_DISPI_ENABLED 0x01 +#define VBE_DISPI_GETCAPS 0x02 +#define VBE_DISPI_8BIT_DAC 0x20 +#define VBE_DISPI_LFB_ENABLED 0x40 +#define VBE_DISPI_NOCLEARMEM 0x80 + +static int bochs_modeset = -1; +static int defx = 1024; +static int defy = 768; + +module_param_named(modeset, bochs_modeset, int, 0444); +MODULE_PARM_DESC(modeset, "enable/disable kernel modesetting"); + +module_param(defx, int, 0444); +module_param(defy, int, 0444); +MODULE_PARM_DESC(defx, "default x resolution"); +MODULE_PARM_DESC(defy, "default y resolution"); + +/* ---------------------------------------------------------------------- */ + +enum bochs_types { + BOCHS_QEMU_STDVGA, + BOCHS_SIMICS, + BOCHS_UNKNOWN, +}; + +struct bochs_device { + /* hw */ + void __iomem *mmio; + int ioports; + void __iomem *fb_map; + unsigned long fb_base; + unsigned long fb_size; + unsigned long qext_size; + + /* mode */ + u16 xres; + u16 yres; + u16 yres_virtual; + u32 stride; + u32 bpp; + struct edid *edid; + + /* drm */ + struct drm_device *dev; + struct drm_simple_display_pipe pipe; + struct drm_connector connector; +}; + +/* ---------------------------------------------------------------------- */ + +static void bochs_vga_writeb(struct bochs_device *bochs, u16 ioport, u8 val) +{ + if (WARN_ON(ioport < 0x3c0 || ioport > 0x3df)) + return; + + if (bochs->mmio) { + int offset = ioport - 0x3c0 + 0x400; + + writeb(val, bochs->mmio + offset); + } else { + outb(val, ioport); + } +} + +static u8 bochs_vga_readb(struct bochs_device *bochs, u16 ioport) +{ + if (WARN_ON(ioport < 0x3c0 || ioport > 0x3df)) + return 0xff; + + if (bochs->mmio) { + int offset = ioport - 0x3c0 + 0x400; + + return readb(bochs->mmio + offset); + } else { + return inb(ioport); + } +} + +static u16 bochs_dispi_read(struct bochs_device *bochs, u16 reg) +{ + u16 ret = 0; + + if (bochs->mmio) { + int offset = 0x500 + (reg << 1); + + ret = readw(bochs->mmio + offset); + } else { + outw(reg, VBE_DISPI_IOPORT_INDEX); + ret = inw(VBE_DISPI_IOPORT_DATA); + } + return ret; +} + +static void bochs_dispi_write(struct bochs_device *bochs, u16 reg, u16 val) +{ + if (bochs->mmio) { + int offset = 0x500 + (reg << 1); + + writew(val, bochs->mmio + offset); + } else { + outw(reg, VBE_DISPI_IOPORT_INDEX); + outw(val, VBE_DISPI_IOPORT_DATA); + } +} + +static void bochs_hw_set_big_endian(struct bochs_device *bochs) +{ + if (bochs->qext_size < 8) + return; + + writel(0xbebebebe, bochs->mmio + 0x604); +} + +static void bochs_hw_set_little_endian(struct bochs_device *bochs) +{ + if (bochs->qext_size < 8) + return; + + writel(0x1e1e1e1e, bochs->mmio + 0x604); +} + +#ifdef __BIG_ENDIAN +#define bochs_hw_set_native_endian(_b) bochs_hw_set_big_endian(_b) +#else +#define bochs_hw_set_native_endian(_b) bochs_hw_set_little_endian(_b) +#endif + +static int bochs_get_edid_block(void *data, u8 *buf, + unsigned int block, size_t len) +{ + struct bochs_device *bochs = data; + size_t i, start = block * EDID_LENGTH; + + if (start + len > 0x400 /* vga register offset */) + return -1; + + for (i = 0; i < len; i++) + buf[i] = readb(bochs->mmio + start + i); + + return 0; +} + +static int bochs_hw_load_edid(struct bochs_device *bochs) +{ + u8 header[8]; + + if (!bochs->mmio) + return -1; + + /* check header to detect whenever edid support is enabled in qemu */ + bochs_get_edid_block(bochs, header, 0, ARRAY_SIZE(header)); + if (drm_edid_header_is_valid(header) != 8) + return -1; + + kfree(bochs->edid); + bochs->edid = drm_do_get_edid(&bochs->connector, + bochs_get_edid_block, bochs); + if (bochs->edid == NULL) + return -1; + + return 0; +} + +static int bochs_hw_init(struct drm_device *dev) +{ + struct bochs_device *bochs = dev->dev_private; + struct pci_dev *pdev = to_pci_dev(dev->dev); + unsigned long addr, size, mem, ioaddr, iosize; + u16 id; + + if (pdev->resource[2].flags & IORESOURCE_MEM) { + /* mmio bar with vga and bochs registers present */ + if (pci_request_region(pdev, 2, "bochs-drm") != 0) { + DRM_ERROR("Cannot request mmio region\n"); + return -EBUSY; + } + ioaddr = pci_resource_start(pdev, 2); + iosize = pci_resource_len(pdev, 2); + bochs->mmio = ioremap(ioaddr, iosize); + if (bochs->mmio == NULL) { + DRM_ERROR("Cannot map mmio region\n"); + return -ENOMEM; + } + } else { + ioaddr = VBE_DISPI_IOPORT_INDEX; + iosize = 2; + if (!request_region(ioaddr, iosize, "bochs-drm")) { + DRM_ERROR("Cannot request ioports\n"); + return -EBUSY; + } + bochs->ioports = 1; + } + + id = bochs_dispi_read(bochs, VBE_DISPI_INDEX_ID); + mem = bochs_dispi_read(bochs, VBE_DISPI_INDEX_VIDEO_MEMORY_64K) + * 64 * 1024; + if ((id & 0xfff0) != VBE_DISPI_ID0) { + DRM_ERROR("ID mismatch\n"); + return -ENODEV; + } + + if ((pdev->resource[0].flags & IORESOURCE_MEM) == 0) + return -ENODEV; + addr = pci_resource_start(pdev, 0); + size = pci_resource_len(pdev, 0); + if (addr == 0) + return -ENODEV; + if (size != mem) { + DRM_ERROR("Size mismatch: pci=%ld, bochs=%ld\n", + size, mem); + size = min(size, mem); + } + + if (pci_request_region(pdev, 0, "bochs-drm") != 0) + DRM_WARN("Cannot request framebuffer, boot fb still active?\n"); + + bochs->fb_map = ioremap(addr, size); + if (bochs->fb_map == NULL) { + DRM_ERROR("Cannot map framebuffer\n"); + return -ENOMEM; + } + bochs->fb_base = addr; + bochs->fb_size = size; + + DRM_INFO("Found bochs VGA, ID 0x%x.\n", id); + DRM_INFO("Framebuffer size %ld kB @ 0x%lx, %s @ 0x%lx.\n", + size / 1024, addr, + bochs->ioports ? "ioports" : "mmio", + ioaddr); + + if (bochs->mmio && pdev->revision >= 2) { + bochs->qext_size = readl(bochs->mmio + 0x600); + if (bochs->qext_size < 4 || bochs->qext_size > iosize) { + bochs->qext_size = 0; + goto noext; + } + DRM_DEBUG("Found qemu ext regs, size %ld\n", + bochs->qext_size); + bochs_hw_set_native_endian(bochs); + } + +noext: + return 0; +} + +static void bochs_hw_fini(struct drm_device *dev) +{ + struct bochs_device *bochs = dev->dev_private; + + /* TODO: shot down existing vram mappings */ + + if (bochs->mmio) + iounmap(bochs->mmio); + if (bochs->ioports) + release_region(VBE_DISPI_IOPORT_INDEX, 2); + if (bochs->fb_map) + iounmap(bochs->fb_map); + pci_release_regions(to_pci_dev(dev->dev)); + kfree(bochs->edid); +} + +static void bochs_hw_blank(struct bochs_device *bochs, bool blank) +{ + DRM_DEBUG_DRIVER("hw_blank %d\n", blank); + /* enable color bit (so VGA_IS1_RC access works) */ + bochs_vga_writeb(bochs, VGA_MIS_W, VGA_MIS_COLOR); + /* discard ar_flip_flop */ + (void)bochs_vga_readb(bochs, VGA_IS1_RC); + /* blank or unblank; we need only update index and set 0x20 */ + bochs_vga_writeb(bochs, VGA_ATT_W, blank ? 0 : 0x20); +} + +static void bochs_hw_setmode(struct bochs_device *bochs, struct drm_display_mode *mode) +{ + int idx; + + if (!drm_dev_enter(bochs->dev, &idx)) + return; + + bochs->xres = mode->hdisplay; + bochs->yres = mode->vdisplay; + bochs->bpp = 32; + bochs->stride = mode->hdisplay * (bochs->bpp / 8); + bochs->yres_virtual = bochs->fb_size / bochs->stride; + + DRM_DEBUG_DRIVER("%dx%d @ %d bpp, vy %d\n", + bochs->xres, bochs->yres, bochs->bpp, + bochs->yres_virtual); + + bochs_hw_blank(bochs, false); + + bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE, 0); + bochs_dispi_write(bochs, VBE_DISPI_INDEX_BPP, bochs->bpp); + bochs_dispi_write(bochs, VBE_DISPI_INDEX_XRES, bochs->xres); + bochs_dispi_write(bochs, VBE_DISPI_INDEX_YRES, bochs->yres); + bochs_dispi_write(bochs, VBE_DISPI_INDEX_BANK, 0); + bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH, bochs->xres); + bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_HEIGHT, + bochs->yres_virtual); + bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, 0); + bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET, 0); + + bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE, + VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED); + + drm_dev_exit(idx); +} + +static void bochs_hw_setformat(struct bochs_device *bochs, const struct drm_format_info *format) +{ + int idx; + + if (!drm_dev_enter(bochs->dev, &idx)) + return; + + DRM_DEBUG_DRIVER("format %c%c%c%c\n", + (format->format >> 0) & 0xff, + (format->format >> 8) & 0xff, + (format->format >> 16) & 0xff, + (format->format >> 24) & 0xff); + + switch (format->format) { + case DRM_FORMAT_XRGB8888: + bochs_hw_set_little_endian(bochs); + break; + case DRM_FORMAT_BGRX8888: + bochs_hw_set_big_endian(bochs); + break; + default: + /* should not happen */ + DRM_ERROR("%s: Huh? Got framebuffer format 0x%x", + __func__, format->format); + break; + } + + drm_dev_exit(idx); +} + +static void bochs_hw_setbase(struct bochs_device *bochs, int x, int y, int stride, u64 addr) +{ + unsigned long offset; + unsigned int vx, vy, vwidth, idx; + + if (!drm_dev_enter(bochs->dev, &idx)) + return; + + bochs->stride = stride; + offset = (unsigned long)addr + + y * bochs->stride + + x * (bochs->bpp / 8); + vy = offset / bochs->stride; + vx = (offset % bochs->stride) * 8 / bochs->bpp; + vwidth = stride * 8 / bochs->bpp; + + DRM_DEBUG_DRIVER("x %d, y %d, addr %llx -> offset %lx, vx %d, vy %d\n", + x, y, addr, offset, vx, vy); + bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH, vwidth); + bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, vx); + bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET, vy); + + drm_dev_exit(idx); +} + +/* ---------------------------------------------------------------------- */ + +static const uint32_t bochs_formats[] = { + DRM_FORMAT_XRGB8888, + DRM_FORMAT_BGRX8888, +}; + +static void bochs_plane_update(struct bochs_device *bochs, struct drm_plane_state *state) +{ + struct drm_gem_vram_object *gbo; + s64 gpu_addr; + + if (!state->fb || !bochs->stride) + return; + + gbo = drm_gem_vram_of_gem(state->fb->obj[0]); + gpu_addr = drm_gem_vram_offset(gbo); + if (WARN_ON_ONCE(gpu_addr < 0)) + return; /* Bug: we didn't pin the BO to VRAM in prepare_fb. */ + + bochs_hw_setbase(bochs, + state->crtc_x, + state->crtc_y, + state->fb->pitches[0], + state->fb->offsets[0] + gpu_addr); + bochs_hw_setformat(bochs, state->fb->format); +} + +static void bochs_pipe_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state, + struct drm_plane_state *plane_state) +{ + struct bochs_device *bochs = pipe->crtc.dev->dev_private; + + bochs_hw_setmode(bochs, &crtc_state->mode); + bochs_plane_update(bochs, plane_state); +} + +static void bochs_pipe_disable(struct drm_simple_display_pipe *pipe) +{ + struct bochs_device *bochs = pipe->crtc.dev->dev_private; + + bochs_hw_blank(bochs, true); +} + +static void bochs_pipe_update(struct drm_simple_display_pipe *pipe, + struct drm_plane_state *old_state) +{ + struct bochs_device *bochs = pipe->crtc.dev->dev_private; + + bochs_plane_update(bochs, pipe->plane.state); +} + +static const struct drm_simple_display_pipe_funcs bochs_pipe_funcs = { + .enable = bochs_pipe_enable, + .disable = bochs_pipe_disable, + .update = bochs_pipe_update, + .prepare_fb = drm_gem_vram_simple_display_pipe_prepare_fb, + .cleanup_fb = drm_gem_vram_simple_display_pipe_cleanup_fb, +}; + +static int bochs_connector_get_modes(struct drm_connector *connector) +{ + struct bochs_device *bochs = + container_of(connector, struct bochs_device, connector); + int count = 0; + + if (bochs->edid) + count = drm_add_edid_modes(connector, bochs->edid); + + if (!count) { + count = drm_add_modes_noedid(connector, 8192, 8192); + drm_set_preferred_mode(connector, defx, defy); + } + return count; +} + +static const struct drm_connector_helper_funcs bochs_connector_connector_helper_funcs = { + .get_modes = bochs_connector_get_modes, +}; + +static const struct drm_connector_funcs bochs_connector_connector_funcs = { + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = drm_connector_cleanup, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static void bochs_connector_init(struct drm_device *dev) +{ + struct bochs_device *bochs = dev->dev_private; + struct drm_connector *connector = &bochs->connector; + + drm_connector_init(dev, connector, &bochs_connector_connector_funcs, + DRM_MODE_CONNECTOR_VIRTUAL); + drm_connector_helper_add(connector, &bochs_connector_connector_helper_funcs); + + bochs_hw_load_edid(bochs); + if (bochs->edid) { + DRM_INFO("Found EDID data blob.\n"); + drm_connector_attach_edid_property(connector); + drm_connector_update_edid_property(connector, bochs->edid); + } +} + +static struct drm_framebuffer * +bochs_gem_fb_create(struct drm_device *dev, struct drm_file *file, + const struct drm_mode_fb_cmd2 *mode_cmd) +{ + if (mode_cmd->pixel_format != DRM_FORMAT_XRGB8888 && + mode_cmd->pixel_format != DRM_FORMAT_BGRX8888) + return ERR_PTR(-EINVAL); + + return drm_gem_fb_create(dev, file, mode_cmd); +} + +static const struct drm_mode_config_funcs bochs_mode_funcs = { + .fb_create = bochs_gem_fb_create, + .mode_valid = drm_vram_helper_mode_valid, + .atomic_check = drm_atomic_helper_check, + .atomic_commit = drm_atomic_helper_commit, +}; + +static int bochs_kms_init(struct bochs_device *bochs) +{ + int ret; + + ret = drmm_mode_config_init(bochs->dev); + if (ret) + return ret; + + bochs->dev->mode_config.max_width = 8192; + bochs->dev->mode_config.max_height = 8192; + + bochs->dev->mode_config.fb_base = bochs->fb_base; + bochs->dev->mode_config.preferred_depth = 24; + bochs->dev->mode_config.prefer_shadow = 0; + bochs->dev->mode_config.prefer_shadow_fbdev = 1; + bochs->dev->mode_config.quirk_addfb_prefer_host_byte_order = true; + + bochs->dev->mode_config.funcs = &bochs_mode_funcs; + + bochs_connector_init(bochs->dev); + drm_simple_display_pipe_init(bochs->dev, + &bochs->pipe, + &bochs_pipe_funcs, + bochs_formats, + ARRAY_SIZE(bochs_formats), + NULL, + &bochs->connector); + + drm_mode_config_reset(bochs->dev); + + return 0; +} + +/* ---------------------------------------------------------------------- */ +/* drm interface */ + +static int bochs_load(struct drm_device *dev) +{ + struct bochs_device *bochs; + int ret; + + bochs = drmm_kzalloc(dev, sizeof(*bochs), GFP_KERNEL); + if (bochs == NULL) + return -ENOMEM; + dev->dev_private = bochs; + bochs->dev = dev; + + ret = bochs_hw_init(dev); + if (ret) + return ret; + + ret = drmm_vram_helper_init(dev, bochs->fb_base, bochs->fb_size); + if (ret) + goto err_hw_fini; + + ret = bochs_kms_init(bochs); + if (ret) + goto err_hw_fini; + + return 0; + +err_hw_fini: + bochs_hw_fini(dev); + return ret; +} + +DEFINE_DRM_GEM_FOPS(bochs_fops); + +static const struct drm_driver bochs_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, + .fops = &bochs_fops, + .name = "bochs-drm", + .desc = "bochs dispi vga interface (qemu stdvga)", + .date = "20130925", + .major = 1, + .minor = 0, + DRM_GEM_VRAM_DRIVER, +}; + +/* ---------------------------------------------------------------------- */ +/* pm interface */ + +#ifdef CONFIG_PM_SLEEP +static int bochs_pm_suspend(struct device *dev) +{ + struct drm_device *drm_dev = dev_get_drvdata(dev); + + return drm_mode_config_helper_suspend(drm_dev); +} + +static int bochs_pm_resume(struct device *dev) +{ + struct drm_device *drm_dev = dev_get_drvdata(dev); + + return drm_mode_config_helper_resume(drm_dev); +} +#endif + +static const struct dev_pm_ops bochs_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend, + bochs_pm_resume) +}; + +/* ---------------------------------------------------------------------- */ +/* pci interface */ + +static int bochs_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + struct drm_device *dev; + unsigned long fbsize; + int ret; + + fbsize = pci_resource_len(pdev, 0); + if (fbsize < 4 * 1024 * 1024) { + DRM_ERROR("less than 4 MB video memory, ignoring device\n"); + return -ENOMEM; + } + + ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &bochs_driver); + if (ret) + return ret; + + dev = drm_dev_alloc(&bochs_driver, &pdev->dev); + if (IS_ERR(dev)) + return PTR_ERR(dev); + + ret = pcim_enable_device(pdev); + if (ret) + goto err_free_dev; + + pci_set_drvdata(pdev, dev); + + ret = bochs_load(dev); + if (ret) + goto err_free_dev; + + ret = drm_dev_register(dev, 0); + if (ret) + goto err_hw_fini; + + drm_fbdev_generic_setup(dev, 32); + return ret; + +err_hw_fini: + bochs_hw_fini(dev); +err_free_dev: + drm_dev_put(dev); + return ret; +} + +static void bochs_pci_remove(struct pci_dev *pdev) +{ + struct drm_device *dev = pci_get_drvdata(pdev); + + drm_dev_unplug(dev); + drm_atomic_helper_shutdown(dev); + bochs_hw_fini(dev); + drm_dev_put(dev); +} + +static const struct pci_device_id bochs_pci_tbl[] = { + { + .vendor = 0x1234, + .device = 0x1111, + .subvendor = PCI_SUBVENDOR_ID_REDHAT_QUMRANET, + .subdevice = PCI_SUBDEVICE_ID_QEMU, + .driver_data = BOCHS_QEMU_STDVGA, + }, + { + .vendor = 0x1234, + .device = 0x1111, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .driver_data = BOCHS_UNKNOWN, + }, + { + .vendor = 0x4321, + .device = 0x1111, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .driver_data = BOCHS_SIMICS, + }, + { /* end of list */ } +}; + +static struct pci_driver bochs_pci_driver = { + .name = "bochs-drm", + .id_table = bochs_pci_tbl, + .probe = bochs_pci_probe, + .remove = bochs_pci_remove, + .driver.pm = &bochs_pm_ops, +}; + +/* ---------------------------------------------------------------------- */ +/* module init/exit */ + +drm_module_pci_driver_if_modeset(bochs_pci_driver, bochs_modeset); + +MODULE_DEVICE_TABLE(pci, bochs_pci_tbl); +MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/tiny/cirrus.c b/drivers/gpu/drm/tiny/cirrus.c new file mode 100644 index 000000000..b27e469e9 --- /dev/null +++ b/drivers/gpu/drm/tiny/cirrus.c @@ -0,0 +1,645 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright 2012-2019 Red Hat + * + * This file is subject to the terms and conditions of the GNU General + * Public License version 2. See the file COPYING in the main + * directory of this archive for more details. + * + * Authors: Matthew Garrett + * Dave Airlie + * Gerd Hoffmann + * + * Portions of this code derived from cirrusfb.c: + * drivers/video/cirrusfb.c - driver for Cirrus Logic chipsets + * + * Copyright 1999-2001 Jeff Garzik <jgarzik@pobox.com> + */ + +#include <linux/iosys-map.h> +#include <linux/module.h> +#include <linux/pci.h> + +#include <video/cirrus.h> +#include <video/vga.h> + +#include <drm/drm_aperture.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_atomic_state_helper.h> +#include <drm/drm_connector.h> +#include <drm/drm_damage_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_edid.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_file.h> +#include <drm/drm_format_helper.h> +#include <drm/drm_fourcc.h> +#include <drm/drm_framebuffer.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_gem_framebuffer_helper.h> +#include <drm/drm_gem_shmem_helper.h> +#include <drm/drm_ioctl.h> +#include <drm/drm_managed.h> +#include <drm/drm_modeset_helper_vtables.h> +#include <drm/drm_module.h> +#include <drm/drm_probe_helper.h> +#include <drm/drm_simple_kms_helper.h> + +#define DRIVER_NAME "cirrus" +#define DRIVER_DESC "qemu cirrus vga" +#define DRIVER_DATE "2019" +#define DRIVER_MAJOR 2 +#define DRIVER_MINOR 0 + +#define CIRRUS_MAX_PITCH (0x1FF << 3) /* (4096 - 1) & ~111b bytes */ +#define CIRRUS_VRAM_SIZE (4 * 1024 * 1024) /* 4 MB */ + +struct cirrus_device { + struct drm_device dev; + struct drm_simple_display_pipe pipe; + struct drm_connector conn; + unsigned int cpp; + unsigned int pitch; + void __iomem *vram; + void __iomem *mmio; +}; + +#define to_cirrus(_dev) container_of(_dev, struct cirrus_device, dev) + +/* ------------------------------------------------------------------ */ +/* + * The meat of this driver. The core passes us a mode and we have to program + * it. The modesetting here is the bare minimum required to satisfy the qemu + * emulation of this hardware, and running this against a real device is + * likely to result in an inadequately programmed mode. We've already had + * the opportunity to modify the mode, so whatever we receive here should + * be something that can be correctly programmed and displayed + */ + +#define SEQ_INDEX 4 +#define SEQ_DATA 5 + +static u8 rreg_seq(struct cirrus_device *cirrus, u8 reg) +{ + iowrite8(reg, cirrus->mmio + SEQ_INDEX); + return ioread8(cirrus->mmio + SEQ_DATA); +} + +static void wreg_seq(struct cirrus_device *cirrus, u8 reg, u8 val) +{ + iowrite8(reg, cirrus->mmio + SEQ_INDEX); + iowrite8(val, cirrus->mmio + SEQ_DATA); +} + +#define CRT_INDEX 0x14 +#define CRT_DATA 0x15 + +static u8 rreg_crt(struct cirrus_device *cirrus, u8 reg) +{ + iowrite8(reg, cirrus->mmio + CRT_INDEX); + return ioread8(cirrus->mmio + CRT_DATA); +} + +static void wreg_crt(struct cirrus_device *cirrus, u8 reg, u8 val) +{ + iowrite8(reg, cirrus->mmio + CRT_INDEX); + iowrite8(val, cirrus->mmio + CRT_DATA); +} + +#define GFX_INDEX 0xe +#define GFX_DATA 0xf + +static void wreg_gfx(struct cirrus_device *cirrus, u8 reg, u8 val) +{ + iowrite8(reg, cirrus->mmio + GFX_INDEX); + iowrite8(val, cirrus->mmio + GFX_DATA); +} + +#define VGA_DAC_MASK 0x06 + +static void wreg_hdr(struct cirrus_device *cirrus, u8 val) +{ + ioread8(cirrus->mmio + VGA_DAC_MASK); + ioread8(cirrus->mmio + VGA_DAC_MASK); + ioread8(cirrus->mmio + VGA_DAC_MASK); + ioread8(cirrus->mmio + VGA_DAC_MASK); + iowrite8(val, cirrus->mmio + VGA_DAC_MASK); +} + +static int cirrus_convert_to(struct drm_framebuffer *fb) +{ + if (fb->format->cpp[0] == 4 && fb->pitches[0] > CIRRUS_MAX_PITCH) { + if (fb->width * 3 <= CIRRUS_MAX_PITCH) + /* convert from XR24 to RG24 */ + return 3; + else + /* convert from XR24 to RG16 */ + return 2; + } + return 0; +} + +static int cirrus_cpp(struct drm_framebuffer *fb) +{ + int convert_cpp = cirrus_convert_to(fb); + + if (convert_cpp) + return convert_cpp; + return fb->format->cpp[0]; +} + +static int cirrus_pitch(struct drm_framebuffer *fb) +{ + int convert_cpp = cirrus_convert_to(fb); + + if (convert_cpp) + return convert_cpp * fb->width; + return fb->pitches[0]; +} + +static void cirrus_set_start_address(struct cirrus_device *cirrus, u32 offset) +{ + int idx; + u32 addr; + u8 tmp; + + if (!drm_dev_enter(&cirrus->dev, &idx)) + return; + + addr = offset >> 2; + wreg_crt(cirrus, 0x0c, (u8)((addr >> 8) & 0xff)); + wreg_crt(cirrus, 0x0d, (u8)(addr & 0xff)); + + tmp = rreg_crt(cirrus, 0x1b); + tmp &= 0xf2; + tmp |= (addr >> 16) & 0x01; + tmp |= (addr >> 15) & 0x0c; + wreg_crt(cirrus, 0x1b, tmp); + + tmp = rreg_crt(cirrus, 0x1d); + tmp &= 0x7f; + tmp |= (addr >> 12) & 0x80; + wreg_crt(cirrus, 0x1d, tmp); + + drm_dev_exit(idx); +} + +static int cirrus_mode_set(struct cirrus_device *cirrus, + struct drm_display_mode *mode, + struct drm_framebuffer *fb) +{ + int hsyncstart, hsyncend, htotal, hdispend; + int vtotal, vdispend; + int tmp, idx; + int sr07 = 0, hdr = 0; + + if (!drm_dev_enter(&cirrus->dev, &idx)) + return -1; + + htotal = mode->htotal / 8; + hsyncend = mode->hsync_end / 8; + hsyncstart = mode->hsync_start / 8; + hdispend = mode->hdisplay / 8; + + vtotal = mode->vtotal; + vdispend = mode->vdisplay; + + vdispend -= 1; + vtotal -= 2; + + htotal -= 5; + hdispend -= 1; + hsyncstart += 1; + hsyncend += 1; + + wreg_crt(cirrus, VGA_CRTC_V_SYNC_END, 0x20); + wreg_crt(cirrus, VGA_CRTC_H_TOTAL, htotal); + wreg_crt(cirrus, VGA_CRTC_H_DISP, hdispend); + wreg_crt(cirrus, VGA_CRTC_H_SYNC_START, hsyncstart); + wreg_crt(cirrus, VGA_CRTC_H_SYNC_END, hsyncend); + wreg_crt(cirrus, VGA_CRTC_V_TOTAL, vtotal & 0xff); + wreg_crt(cirrus, VGA_CRTC_V_DISP_END, vdispend & 0xff); + + tmp = 0x40; + if ((vdispend + 1) & 512) + tmp |= 0x20; + wreg_crt(cirrus, VGA_CRTC_MAX_SCAN, tmp); + + /* + * Overflow bits for values that don't fit in the standard registers + */ + tmp = 0x10; + if (vtotal & 0x100) + tmp |= 0x01; + if (vdispend & 0x100) + tmp |= 0x02; + if ((vdispend + 1) & 0x100) + tmp |= 0x08; + if (vtotal & 0x200) + tmp |= 0x20; + if (vdispend & 0x200) + tmp |= 0x40; + wreg_crt(cirrus, VGA_CRTC_OVERFLOW, tmp); + + tmp = 0; + + /* More overflow bits */ + + if ((htotal + 5) & 0x40) + tmp |= 0x10; + if ((htotal + 5) & 0x80) + tmp |= 0x20; + if (vtotal & 0x100) + tmp |= 0x40; + if (vtotal & 0x200) + tmp |= 0x80; + + wreg_crt(cirrus, CL_CRT1A, tmp); + + /* Disable Hercules/CGA compatibility */ + wreg_crt(cirrus, VGA_CRTC_MODE, 0x03); + + sr07 = rreg_seq(cirrus, 0x07); + sr07 &= 0xe0; + hdr = 0; + + cirrus->cpp = cirrus_cpp(fb); + switch (cirrus->cpp * 8) { + case 8: + sr07 |= 0x11; + break; + case 16: + sr07 |= 0x17; + hdr = 0xc1; + break; + case 24: + sr07 |= 0x15; + hdr = 0xc5; + break; + case 32: + sr07 |= 0x19; + hdr = 0xc5; + break; + default: + drm_dev_exit(idx); + return -1; + } + + wreg_seq(cirrus, 0x7, sr07); + + /* Program the pitch */ + cirrus->pitch = cirrus_pitch(fb); + tmp = cirrus->pitch / 8; + wreg_crt(cirrus, VGA_CRTC_OFFSET, tmp); + + /* Enable extended blanking and pitch bits, and enable full memory */ + tmp = 0x22; + tmp |= (cirrus->pitch >> 7) & 0x10; + tmp |= (cirrus->pitch >> 6) & 0x40; + wreg_crt(cirrus, 0x1b, tmp); + + /* Enable high-colour modes */ + wreg_gfx(cirrus, VGA_GFX_MODE, 0x40); + + /* And set graphics mode */ + wreg_gfx(cirrus, VGA_GFX_MISC, 0x01); + + wreg_hdr(cirrus, hdr); + + cirrus_set_start_address(cirrus, 0); + + /* Unblank (needed on S3 resume, vgabios doesn't do it then) */ + outb(0x20, 0x3c0); + + drm_dev_exit(idx); + return 0; +} + +static int cirrus_fb_blit_rect(struct drm_framebuffer *fb, + const struct iosys_map *vmap, + struct drm_rect *rect) +{ + struct cirrus_device *cirrus = to_cirrus(fb->dev); + struct iosys_map dst; + int idx; + + if (!drm_dev_enter(&cirrus->dev, &idx)) + return -ENODEV; + + iosys_map_set_vaddr_iomem(&dst, cirrus->vram); + + if (cirrus->cpp == fb->format->cpp[0]) { + iosys_map_incr(&dst, drm_fb_clip_offset(fb->pitches[0], fb->format, rect)); + drm_fb_memcpy(&dst, fb->pitches, vmap, fb, rect); + + } else if (fb->format->cpp[0] == 4 && cirrus->cpp == 2) { + iosys_map_incr(&dst, drm_fb_clip_offset(cirrus->pitch, fb->format, rect)); + drm_fb_xrgb8888_to_rgb565(&dst, &cirrus->pitch, vmap, fb, rect, false); + + } else if (fb->format->cpp[0] == 4 && cirrus->cpp == 3) { + iosys_map_incr(&dst, drm_fb_clip_offset(cirrus->pitch, fb->format, rect)); + drm_fb_xrgb8888_to_rgb888(&dst, &cirrus->pitch, vmap, fb, rect); + + } else { + WARN_ON_ONCE("cpp mismatch"); + } + + drm_dev_exit(idx); + + return 0; +} + +static int cirrus_fb_blit_fullscreen(struct drm_framebuffer *fb, + const struct iosys_map *map) +{ + struct drm_rect fullscreen = { + .x1 = 0, + .x2 = fb->width, + .y1 = 0, + .y2 = fb->height, + }; + return cirrus_fb_blit_rect(fb, map, &fullscreen); +} + +static int cirrus_check_size(int width, int height, + struct drm_framebuffer *fb) +{ + int pitch = width * 2; + + if (fb) + pitch = cirrus_pitch(fb); + + if (pitch > CIRRUS_MAX_PITCH) + return -EINVAL; + if (pitch * height > CIRRUS_VRAM_SIZE) + return -EINVAL; + return 0; +} + +/* ------------------------------------------------------------------ */ +/* cirrus connector */ + +static int cirrus_conn_get_modes(struct drm_connector *conn) +{ + int count; + + count = drm_add_modes_noedid(conn, + conn->dev->mode_config.max_width, + conn->dev->mode_config.max_height); + drm_set_preferred_mode(conn, 1024, 768); + return count; +} + +static const struct drm_connector_helper_funcs cirrus_conn_helper_funcs = { + .get_modes = cirrus_conn_get_modes, +}; + +static const struct drm_connector_funcs cirrus_conn_funcs = { + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = drm_connector_cleanup, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static int cirrus_conn_init(struct cirrus_device *cirrus) +{ + drm_connector_helper_add(&cirrus->conn, &cirrus_conn_helper_funcs); + return drm_connector_init(&cirrus->dev, &cirrus->conn, + &cirrus_conn_funcs, DRM_MODE_CONNECTOR_VGA); + +} + +/* ------------------------------------------------------------------ */ +/* cirrus (simple) display pipe */ + +static enum drm_mode_status cirrus_pipe_mode_valid(struct drm_simple_display_pipe *pipe, + const struct drm_display_mode *mode) +{ + if (cirrus_check_size(mode->hdisplay, mode->vdisplay, NULL) < 0) + return MODE_BAD; + return MODE_OK; +} + +static int cirrus_pipe_check(struct drm_simple_display_pipe *pipe, + struct drm_plane_state *plane_state, + struct drm_crtc_state *crtc_state) +{ + struct drm_framebuffer *fb = plane_state->fb; + + if (!fb) + return 0; + return cirrus_check_size(fb->width, fb->height, fb); +} + +static void cirrus_pipe_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state, + struct drm_plane_state *plane_state) +{ + struct cirrus_device *cirrus = to_cirrus(pipe->crtc.dev); + struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state); + + cirrus_mode_set(cirrus, &crtc_state->mode, plane_state->fb); + cirrus_fb_blit_fullscreen(plane_state->fb, &shadow_plane_state->data[0]); +} + +static void cirrus_pipe_update(struct drm_simple_display_pipe *pipe, + struct drm_plane_state *old_state) +{ + struct cirrus_device *cirrus = to_cirrus(pipe->crtc.dev); + struct drm_plane_state *state = pipe->plane.state; + struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(state); + struct drm_crtc *crtc = &pipe->crtc; + struct drm_rect rect; + + if (state->fb && cirrus->cpp != cirrus_cpp(state->fb)) + cirrus_mode_set(cirrus, &crtc->mode, state->fb); + + if (state->fb && drm_atomic_helper_damage_merged(old_state, state, &rect)) + cirrus_fb_blit_rect(state->fb, &shadow_plane_state->data[0], &rect); +} + +static const struct drm_simple_display_pipe_funcs cirrus_pipe_funcs = { + .mode_valid = cirrus_pipe_mode_valid, + .check = cirrus_pipe_check, + .enable = cirrus_pipe_enable, + .update = cirrus_pipe_update, + DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS, +}; + +static const uint32_t cirrus_formats[] = { + DRM_FORMAT_RGB565, + DRM_FORMAT_RGB888, + DRM_FORMAT_XRGB8888, +}; + +static const uint64_t cirrus_modifiers[] = { + DRM_FORMAT_MOD_LINEAR, + DRM_FORMAT_MOD_INVALID +}; + +static int cirrus_pipe_init(struct cirrus_device *cirrus) +{ + return drm_simple_display_pipe_init(&cirrus->dev, + &cirrus->pipe, + &cirrus_pipe_funcs, + cirrus_formats, + ARRAY_SIZE(cirrus_formats), + cirrus_modifiers, + &cirrus->conn); +} + +/* ------------------------------------------------------------------ */ +/* cirrus framebuffers & mode config */ + +static struct drm_framebuffer* +cirrus_fb_create(struct drm_device *dev, struct drm_file *file_priv, + const struct drm_mode_fb_cmd2 *mode_cmd) +{ + if (mode_cmd->pixel_format != DRM_FORMAT_RGB565 && + mode_cmd->pixel_format != DRM_FORMAT_RGB888 && + mode_cmd->pixel_format != DRM_FORMAT_XRGB8888) + return ERR_PTR(-EINVAL); + if (cirrus_check_size(mode_cmd->width, mode_cmd->height, NULL) < 0) + return ERR_PTR(-EINVAL); + return drm_gem_fb_create_with_dirty(dev, file_priv, mode_cmd); +} + +static const struct drm_mode_config_funcs cirrus_mode_config_funcs = { + .fb_create = cirrus_fb_create, + .atomic_check = drm_atomic_helper_check, + .atomic_commit = drm_atomic_helper_commit, +}; + +static int cirrus_mode_config_init(struct cirrus_device *cirrus) +{ + struct drm_device *dev = &cirrus->dev; + int ret; + + ret = drmm_mode_config_init(dev); + if (ret) + return ret; + + dev->mode_config.min_width = 0; + dev->mode_config.min_height = 0; + dev->mode_config.max_width = CIRRUS_MAX_PITCH / 2; + dev->mode_config.max_height = 1024; + dev->mode_config.preferred_depth = 16; + dev->mode_config.prefer_shadow = 0; + dev->mode_config.funcs = &cirrus_mode_config_funcs; + + return 0; +} + +/* ------------------------------------------------------------------ */ + +DEFINE_DRM_GEM_FOPS(cirrus_fops); + +static const struct drm_driver cirrus_driver = { + .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC, + + .name = DRIVER_NAME, + .desc = DRIVER_DESC, + .date = DRIVER_DATE, + .major = DRIVER_MAJOR, + .minor = DRIVER_MINOR, + + .fops = &cirrus_fops, + DRM_GEM_SHMEM_DRIVER_OPS, +}; + +static int cirrus_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct drm_device *dev; + struct cirrus_device *cirrus; + int ret; + + ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &cirrus_driver); + if (ret) + return ret; + + ret = pcim_enable_device(pdev); + if (ret) + return ret; + + ret = pci_request_regions(pdev, DRIVER_NAME); + if (ret) + return ret; + + ret = -ENOMEM; + cirrus = devm_drm_dev_alloc(&pdev->dev, &cirrus_driver, + struct cirrus_device, dev); + if (IS_ERR(cirrus)) + return PTR_ERR(cirrus); + + dev = &cirrus->dev; + + cirrus->vram = devm_ioremap(&pdev->dev, pci_resource_start(pdev, 0), + pci_resource_len(pdev, 0)); + if (cirrus->vram == NULL) + return -ENOMEM; + + cirrus->mmio = devm_ioremap(&pdev->dev, pci_resource_start(pdev, 1), + pci_resource_len(pdev, 1)); + if (cirrus->mmio == NULL) + return -ENOMEM; + + ret = cirrus_mode_config_init(cirrus); + if (ret) + return ret; + + ret = cirrus_conn_init(cirrus); + if (ret < 0) + return ret; + + ret = cirrus_pipe_init(cirrus); + if (ret < 0) + return ret; + + drm_mode_config_reset(dev); + + pci_set_drvdata(pdev, dev); + ret = drm_dev_register(dev, 0); + if (ret) + return ret; + + drm_fbdev_generic_setup(dev, dev->mode_config.preferred_depth); + return 0; +} + +static void cirrus_pci_remove(struct pci_dev *pdev) +{ + struct drm_device *dev = pci_get_drvdata(pdev); + + drm_dev_unplug(dev); + drm_atomic_helper_shutdown(dev); +} + +static const struct pci_device_id pciidlist[] = { + { + .vendor = PCI_VENDOR_ID_CIRRUS, + .device = PCI_DEVICE_ID_CIRRUS_5446, + /* only bind to the cirrus chip in qemu */ + .subvendor = PCI_SUBVENDOR_ID_REDHAT_QUMRANET, + .subdevice = PCI_SUBDEVICE_ID_QEMU, + }, { + .vendor = PCI_VENDOR_ID_CIRRUS, + .device = PCI_DEVICE_ID_CIRRUS_5446, + .subvendor = PCI_VENDOR_ID_XEN, + .subdevice = 0x0001, + }, + { /* end if list */ } +}; + +static struct pci_driver cirrus_pci_driver = { + .name = DRIVER_NAME, + .id_table = pciidlist, + .probe = cirrus_pci_probe, + .remove = cirrus_pci_remove, +}; + +drm_module_pci_driver(cirrus_pci_driver) + +MODULE_DEVICE_TABLE(pci, pciidlist); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/tiny/gm12u320.c b/drivers/gpu/drm/tiny/gm12u320.c new file mode 100644 index 000000000..8b0a9059d --- /dev/null +++ b/drivers/gpu/drm/tiny/gm12u320.c @@ -0,0 +1,759 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2019 Hans de Goede <hdegoede@redhat.com> + */ + +#include <linux/module.h> +#include <linux/usb.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_atomic_state_helper.h> +#include <drm/drm_connector.h> +#include <drm/drm_damage_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_edid.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_file.h> +#include <drm/drm_format_helper.h> +#include <drm/drm_fourcc.h> +#include <drm/drm_framebuffer.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_gem_framebuffer_helper.h> +#include <drm/drm_gem_shmem_helper.h> +#include <drm/drm_ioctl.h> +#include <drm/drm_managed.h> +#include <drm/drm_modeset_helper_vtables.h> +#include <drm/drm_probe_helper.h> +#include <drm/drm_simple_kms_helper.h> + +static bool eco_mode; +module_param(eco_mode, bool, 0644); +MODULE_PARM_DESC(eco_mode, "Turn on Eco mode (less bright, more silent)"); + +#define DRIVER_NAME "gm12u320" +#define DRIVER_DESC "Grain Media GM12U320 USB projector display" +#define DRIVER_DATE "2019" +#define DRIVER_MAJOR 1 +#define DRIVER_MINOR 0 + +/* + * The DLP has an actual width of 854 pixels, but that is not a multiple + * of 8, breaking things left and right, so we export a width of 848. + */ +#define GM12U320_USER_WIDTH 848 +#define GM12U320_REAL_WIDTH 854 +#define GM12U320_HEIGHT 480 + +#define GM12U320_BLOCK_COUNT 20 + +#define GM12U320_ERR(fmt, ...) \ + DRM_DEV_ERROR(gm12u320->dev.dev, fmt, ##__VA_ARGS__) + +#define MISC_RCV_EPT 1 +#define DATA_RCV_EPT 2 +#define DATA_SND_EPT 3 +#define MISC_SND_EPT 4 + +#define DATA_BLOCK_HEADER_SIZE 84 +#define DATA_BLOCK_CONTENT_SIZE 64512 +#define DATA_BLOCK_FOOTER_SIZE 20 +#define DATA_BLOCK_SIZE (DATA_BLOCK_HEADER_SIZE + \ + DATA_BLOCK_CONTENT_SIZE + \ + DATA_BLOCK_FOOTER_SIZE) +#define DATA_LAST_BLOCK_CONTENT_SIZE 4032 +#define DATA_LAST_BLOCK_SIZE (DATA_BLOCK_HEADER_SIZE + \ + DATA_LAST_BLOCK_CONTENT_SIZE + \ + DATA_BLOCK_FOOTER_SIZE) + +#define CMD_SIZE 31 +#define READ_STATUS_SIZE 13 +#define MISC_VALUE_SIZE 4 + +#define CMD_TIMEOUT 200 +#define DATA_TIMEOUT 1000 +#define IDLE_TIMEOUT 2000 +#define FIRST_FRAME_TIMEOUT 2000 + +#define MISC_REQ_GET_SET_ECO_A 0xff +#define MISC_REQ_GET_SET_ECO_B 0x35 +/* Windows driver does once every second, with arg d = 1, other args 0 */ +#define MISC_REQ_UNKNOWN1_A 0xff +#define MISC_REQ_UNKNOWN1_B 0x38 +/* Windows driver does this on init, with arg a, b = 0, c = 0xa0, d = 4 */ +#define MISC_REQ_UNKNOWN2_A 0xa5 +#define MISC_REQ_UNKNOWN2_B 0x00 + +struct gm12u320_device { + struct drm_device dev; + struct device *dmadev; + struct drm_simple_display_pipe pipe; + struct drm_connector conn; + unsigned char *cmd_buf; + unsigned char *data_buf[GM12U320_BLOCK_COUNT]; + struct { + struct delayed_work work; + struct mutex lock; + struct drm_framebuffer *fb; + struct drm_rect rect; + int frame; + int draw_status_timeout; + struct iosys_map src_map; + } fb_update; +}; + +#define to_gm12u320(__dev) container_of(__dev, struct gm12u320_device, dev) + +static const char cmd_data[CMD_SIZE] = { + 0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00, + 0x68, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x10, 0xff, + 0x00, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x80, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 +}; + +static const char cmd_draw[CMD_SIZE] = { + 0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0xfe, + 0x00, 0x00, 0x00, 0xc0, 0xd1, 0x05, 0x00, 0x40, + 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 +}; + +static const char cmd_misc[CMD_SIZE] = { + 0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00, + 0x04, 0x00, 0x00, 0x00, 0x80, 0x01, 0x10, 0xfd, + 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 +}; + +static const char data_block_header[DATA_BLOCK_HEADER_SIZE] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x04, 0x15, 0x00, 0x00, 0xfc, 0x00, 0x00, + 0x01, 0x00, 0x00, 0xdb +}; + +static const char data_last_block_header[DATA_BLOCK_HEADER_SIZE] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x2a, 0x00, 0x20, 0x00, 0xc0, 0x0f, 0x00, 0x00, + 0x01, 0x00, 0x00, 0xd7 +}; + +static const char data_block_footer[DATA_BLOCK_FOOTER_SIZE] = { + 0xfb, 0x14, 0x02, 0x20, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x80, 0x00, 0x00, 0x4f +}; + +static inline struct usb_device *gm12u320_to_usb_device(struct gm12u320_device *gm12u320) +{ + return interface_to_usbdev(to_usb_interface(gm12u320->dev.dev)); +} + +static int gm12u320_usb_alloc(struct gm12u320_device *gm12u320) +{ + int i, block_size; + const char *hdr; + + gm12u320->cmd_buf = drmm_kmalloc(&gm12u320->dev, CMD_SIZE, GFP_KERNEL); + if (!gm12u320->cmd_buf) + return -ENOMEM; + + for (i = 0; i < GM12U320_BLOCK_COUNT; i++) { + if (i == GM12U320_BLOCK_COUNT - 1) { + block_size = DATA_LAST_BLOCK_SIZE; + hdr = data_last_block_header; + } else { + block_size = DATA_BLOCK_SIZE; + hdr = data_block_header; + } + + gm12u320->data_buf[i] = drmm_kzalloc(&gm12u320->dev, + block_size, GFP_KERNEL); + if (!gm12u320->data_buf[i]) + return -ENOMEM; + + memcpy(gm12u320->data_buf[i], hdr, DATA_BLOCK_HEADER_SIZE); + memcpy(gm12u320->data_buf[i] + + (block_size - DATA_BLOCK_FOOTER_SIZE), + data_block_footer, DATA_BLOCK_FOOTER_SIZE); + } + + return 0; +} + +static int gm12u320_misc_request(struct gm12u320_device *gm12u320, + u8 req_a, u8 req_b, + u8 arg_a, u8 arg_b, u8 arg_c, u8 arg_d) +{ + struct usb_device *udev = gm12u320_to_usb_device(gm12u320); + int ret, len; + + memcpy(gm12u320->cmd_buf, &cmd_misc, CMD_SIZE); + gm12u320->cmd_buf[20] = req_a; + gm12u320->cmd_buf[21] = req_b; + gm12u320->cmd_buf[22] = arg_a; + gm12u320->cmd_buf[23] = arg_b; + gm12u320->cmd_buf[24] = arg_c; + gm12u320->cmd_buf[25] = arg_d; + + /* Send request */ + ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, MISC_SND_EPT), + gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT); + if (ret || len != CMD_SIZE) { + GM12U320_ERR("Misc. req. error %d\n", ret); + return -EIO; + } + + /* Read value */ + ret = usb_bulk_msg(udev, usb_rcvbulkpipe(udev, MISC_RCV_EPT), + gm12u320->cmd_buf, MISC_VALUE_SIZE, &len, + DATA_TIMEOUT); + if (ret || len != MISC_VALUE_SIZE) { + GM12U320_ERR("Misc. value error %d\n", ret); + return -EIO; + } + /* cmd_buf[0] now contains the read value, which we don't use */ + + /* Read status */ + ret = usb_bulk_msg(udev, usb_rcvbulkpipe(udev, MISC_RCV_EPT), + gm12u320->cmd_buf, READ_STATUS_SIZE, &len, + CMD_TIMEOUT); + if (ret || len != READ_STATUS_SIZE) { + GM12U320_ERR("Misc. status error %d\n", ret); + return -EIO; + } + + return 0; +} + +static void gm12u320_32bpp_to_24bpp_packed(u8 *dst, u8 *src, int len) +{ + while (len--) { + *dst++ = *src++; + *dst++ = *src++; + *dst++ = *src++; + src++; + } +} + +static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320) +{ + int block, dst_offset, len, remain, ret, x1, x2, y1, y2; + struct drm_framebuffer *fb; + void *vaddr; + u8 *src; + + mutex_lock(&gm12u320->fb_update.lock); + + if (!gm12u320->fb_update.fb) + goto unlock; + + fb = gm12u320->fb_update.fb; + x1 = gm12u320->fb_update.rect.x1; + x2 = gm12u320->fb_update.rect.x2; + y1 = gm12u320->fb_update.rect.y1; + y2 = gm12u320->fb_update.rect.y2; + vaddr = gm12u320->fb_update.src_map.vaddr; /* TODO: Use mapping abstraction properly */ + + ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE); + if (ret) { + GM12U320_ERR("drm_gem_fb_begin_cpu_access err: %d\n", ret); + goto put_fb; + } + + src = vaddr + y1 * fb->pitches[0] + x1 * 4; + + x1 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2; + x2 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2; + + for (; y1 < y2; y1++) { + remain = 0; + len = (x2 - x1) * 3; + dst_offset = (y1 * GM12U320_REAL_WIDTH + x1) * 3; + block = dst_offset / DATA_BLOCK_CONTENT_SIZE; + dst_offset %= DATA_BLOCK_CONTENT_SIZE; + + if ((dst_offset + len) > DATA_BLOCK_CONTENT_SIZE) { + remain = dst_offset + len - DATA_BLOCK_CONTENT_SIZE; + len = DATA_BLOCK_CONTENT_SIZE - dst_offset; + } + + dst_offset += DATA_BLOCK_HEADER_SIZE; + len /= 3; + + gm12u320_32bpp_to_24bpp_packed( + gm12u320->data_buf[block] + dst_offset, + src, len); + + if (remain) { + block++; + dst_offset = DATA_BLOCK_HEADER_SIZE; + gm12u320_32bpp_to_24bpp_packed( + gm12u320->data_buf[block] + dst_offset, + src + len * 4, remain / 3); + } + src += fb->pitches[0]; + } + + drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE); +put_fb: + drm_framebuffer_put(fb); + gm12u320->fb_update.fb = NULL; +unlock: + mutex_unlock(&gm12u320->fb_update.lock); +} + +static void gm12u320_fb_update_work(struct work_struct *work) +{ + struct gm12u320_device *gm12u320 = + container_of(to_delayed_work(work), struct gm12u320_device, + fb_update.work); + struct usb_device *udev = gm12u320_to_usb_device(gm12u320); + int block, block_size, len; + int ret = 0; + + gm12u320_copy_fb_to_blocks(gm12u320); + + for (block = 0; block < GM12U320_BLOCK_COUNT; block++) { + if (block == GM12U320_BLOCK_COUNT - 1) + block_size = DATA_LAST_BLOCK_SIZE; + else + block_size = DATA_BLOCK_SIZE; + + /* Send data command to device */ + memcpy(gm12u320->cmd_buf, cmd_data, CMD_SIZE); + gm12u320->cmd_buf[8] = block_size & 0xff; + gm12u320->cmd_buf[9] = block_size >> 8; + gm12u320->cmd_buf[20] = 0xfc - block * 4; + gm12u320->cmd_buf[21] = + block | (gm12u320->fb_update.frame << 7); + + ret = usb_bulk_msg(udev, + usb_sndbulkpipe(udev, DATA_SND_EPT), + gm12u320->cmd_buf, CMD_SIZE, &len, + CMD_TIMEOUT); + if (ret || len != CMD_SIZE) + goto err; + + /* Send data block to device */ + ret = usb_bulk_msg(udev, + usb_sndbulkpipe(udev, DATA_SND_EPT), + gm12u320->data_buf[block], block_size, + &len, DATA_TIMEOUT); + if (ret || len != block_size) + goto err; + + /* Read status */ + ret = usb_bulk_msg(udev, + usb_rcvbulkpipe(udev, DATA_RCV_EPT), + gm12u320->cmd_buf, READ_STATUS_SIZE, &len, + CMD_TIMEOUT); + if (ret || len != READ_STATUS_SIZE) + goto err; + } + + /* Send draw command to device */ + memcpy(gm12u320->cmd_buf, cmd_draw, CMD_SIZE); + ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, DATA_SND_EPT), + gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT); + if (ret || len != CMD_SIZE) + goto err; + + /* Read status */ + ret = usb_bulk_msg(udev, usb_rcvbulkpipe(udev, DATA_RCV_EPT), + gm12u320->cmd_buf, READ_STATUS_SIZE, &len, + gm12u320->fb_update.draw_status_timeout); + if (ret || len != READ_STATUS_SIZE) + goto err; + + gm12u320->fb_update.draw_status_timeout = CMD_TIMEOUT; + gm12u320->fb_update.frame = !gm12u320->fb_update.frame; + + /* + * We must draw a frame every 2s otherwise the projector + * switches back to showing its logo. + */ + queue_delayed_work(system_long_wq, &gm12u320->fb_update.work, + msecs_to_jiffies(IDLE_TIMEOUT)); + + return; +err: + /* Do not log errors caused by module unload or device unplug */ + if (ret != -ENODEV && ret != -ECONNRESET && ret != -ESHUTDOWN) + GM12U320_ERR("Frame update error: %d\n", ret); +} + +static void gm12u320_fb_mark_dirty(struct drm_framebuffer *fb, + const struct iosys_map *map, + struct drm_rect *dirty) +{ + struct gm12u320_device *gm12u320 = to_gm12u320(fb->dev); + struct drm_framebuffer *old_fb = NULL; + bool wakeup = false; + + mutex_lock(&gm12u320->fb_update.lock); + + if (gm12u320->fb_update.fb != fb) { + old_fb = gm12u320->fb_update.fb; + drm_framebuffer_get(fb); + gm12u320->fb_update.fb = fb; + gm12u320->fb_update.rect = *dirty; + gm12u320->fb_update.src_map = *map; + wakeup = true; + } else { + struct drm_rect *rect = &gm12u320->fb_update.rect; + + rect->x1 = min(rect->x1, dirty->x1); + rect->y1 = min(rect->y1, dirty->y1); + rect->x2 = max(rect->x2, dirty->x2); + rect->y2 = max(rect->y2, dirty->y2); + } + + mutex_unlock(&gm12u320->fb_update.lock); + + if (wakeup) + mod_delayed_work(system_long_wq, &gm12u320->fb_update.work, 0); + + if (old_fb) + drm_framebuffer_put(old_fb); +} + +static void gm12u320_stop_fb_update(struct gm12u320_device *gm12u320) +{ + struct drm_framebuffer *old_fb; + + cancel_delayed_work_sync(&gm12u320->fb_update.work); + + mutex_lock(&gm12u320->fb_update.lock); + old_fb = gm12u320->fb_update.fb; + gm12u320->fb_update.fb = NULL; + iosys_map_clear(&gm12u320->fb_update.src_map); + mutex_unlock(&gm12u320->fb_update.lock); + + drm_framebuffer_put(old_fb); +} + +static int gm12u320_set_ecomode(struct gm12u320_device *gm12u320) +{ + return gm12u320_misc_request(gm12u320, MISC_REQ_GET_SET_ECO_A, + MISC_REQ_GET_SET_ECO_B, 0x01 /* set */, + eco_mode ? 0x01 : 0x00, 0x00, 0x01); +} + +/* ------------------------------------------------------------------ */ +/* gm12u320 connector */ + +/* + * We use fake EDID info so that userspace know that it is dealing with + * an Acer projector, rather then listing this as an "unknown" monitor. + * Note this assumes this driver is only ever used with the Acer C120, if we + * add support for other devices the vendor and model should be parameterized. + */ +static struct edid gm12u320_edid = { + .header = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }, + .mfg_id = { 0x04, 0x72 }, /* "ACR" */ + .prod_code = { 0x20, 0xc1 }, /* C120h */ + .serial = 0xaa55aa55, + .mfg_week = 1, + .mfg_year = 16, + .version = 1, /* EDID 1.3 */ + .revision = 3, /* EDID 1.3 */ + .input = 0x08, /* Analog input */ + .features = 0x0a, /* Pref timing in DTD 1 */ + .standard_timings = { { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 }, + { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 } }, + .detailed_timings = { { + .pixel_clock = 3383, + /* hactive = 848, hblank = 256 */ + .data.pixel_data.hactive_lo = 0x50, + .data.pixel_data.hblank_lo = 0x00, + .data.pixel_data.hactive_hblank_hi = 0x31, + /* vactive = 480, vblank = 28 */ + .data.pixel_data.vactive_lo = 0xe0, + .data.pixel_data.vblank_lo = 0x1c, + .data.pixel_data.vactive_vblank_hi = 0x10, + /* hsync offset 40 pw 128, vsync offset 1 pw 4 */ + .data.pixel_data.hsync_offset_lo = 0x28, + .data.pixel_data.hsync_pulse_width_lo = 0x80, + .data.pixel_data.vsync_offset_pulse_width_lo = 0x14, + .data.pixel_data.hsync_vsync_offset_pulse_width_hi = 0x00, + /* Digital separate syncs, hsync+, vsync+ */ + .data.pixel_data.misc = 0x1e, + }, { + .pixel_clock = 0, + .data.other_data.type = 0xfd, /* Monitor ranges */ + .data.other_data.data.range.min_vfreq = 59, + .data.other_data.data.range.max_vfreq = 61, + .data.other_data.data.range.min_hfreq_khz = 29, + .data.other_data.data.range.max_hfreq_khz = 32, + .data.other_data.data.range.pixel_clock_mhz = 4, /* 40 MHz */ + .data.other_data.data.range.flags = 0, + .data.other_data.data.range.formula.cvt = { + 0xa0, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 }, + }, { + .pixel_clock = 0, + .data.other_data.type = 0xfc, /* Model string */ + .data.other_data.data.str.str = { + 'P', 'r', 'o', 'j', 'e', 'c', 't', 'o', 'r', '\n', + ' ', ' ', ' ' }, + }, { + .pixel_clock = 0, + .data.other_data.type = 0xfe, /* Unspecified text / padding */ + .data.other_data.data.str.str = { + '\n', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', + ' ', ' ', ' ' }, + } }, + .checksum = 0x13, +}; + +static int gm12u320_conn_get_modes(struct drm_connector *connector) +{ + drm_connector_update_edid_property(connector, &gm12u320_edid); + return drm_add_edid_modes(connector, &gm12u320_edid); +} + +static const struct drm_connector_helper_funcs gm12u320_conn_helper_funcs = { + .get_modes = gm12u320_conn_get_modes, +}; + +static const struct drm_connector_funcs gm12u320_conn_funcs = { + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = drm_connector_cleanup, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static int gm12u320_conn_init(struct gm12u320_device *gm12u320) +{ + drm_connector_helper_add(&gm12u320->conn, &gm12u320_conn_helper_funcs); + return drm_connector_init(&gm12u320->dev, &gm12u320->conn, + &gm12u320_conn_funcs, DRM_MODE_CONNECTOR_VGA); +} + +/* ------------------------------------------------------------------ */ +/* gm12u320 (simple) display pipe */ + +static void gm12u320_pipe_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state, + struct drm_plane_state *plane_state) +{ + struct drm_rect rect = { 0, 0, GM12U320_USER_WIDTH, GM12U320_HEIGHT }; + struct gm12u320_device *gm12u320 = to_gm12u320(pipe->crtc.dev); + struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state); + + gm12u320->fb_update.draw_status_timeout = FIRST_FRAME_TIMEOUT; + gm12u320_fb_mark_dirty(plane_state->fb, &shadow_plane_state->data[0], &rect); +} + +static void gm12u320_pipe_disable(struct drm_simple_display_pipe *pipe) +{ + struct gm12u320_device *gm12u320 = to_gm12u320(pipe->crtc.dev); + + gm12u320_stop_fb_update(gm12u320); +} + +static void gm12u320_pipe_update(struct drm_simple_display_pipe *pipe, + struct drm_plane_state *old_state) +{ + struct drm_plane_state *state = pipe->plane.state; + struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(state); + struct drm_rect rect; + + if (drm_atomic_helper_damage_merged(old_state, state, &rect)) + gm12u320_fb_mark_dirty(state->fb, &shadow_plane_state->data[0], &rect); +} + +static const struct drm_simple_display_pipe_funcs gm12u320_pipe_funcs = { + .enable = gm12u320_pipe_enable, + .disable = gm12u320_pipe_disable, + .update = gm12u320_pipe_update, + DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS, +}; + +static const uint32_t gm12u320_pipe_formats[] = { + DRM_FORMAT_XRGB8888, +}; + +static const uint64_t gm12u320_pipe_modifiers[] = { + DRM_FORMAT_MOD_LINEAR, + DRM_FORMAT_MOD_INVALID +}; + +/* + * FIXME: Dma-buf sharing requires DMA support by the importing device. + * This function is a workaround to make USB devices work as well. + * See todo.rst for how to fix the issue in the dma-buf framework. + */ +static struct drm_gem_object *gm12u320_gem_prime_import(struct drm_device *dev, + struct dma_buf *dma_buf) +{ + struct gm12u320_device *gm12u320 = to_gm12u320(dev); + + if (!gm12u320->dmadev) + return ERR_PTR(-ENODEV); + + return drm_gem_prime_import_dev(dev, dma_buf, gm12u320->dmadev); +} + +DEFINE_DRM_GEM_FOPS(gm12u320_fops); + +static const struct drm_driver gm12u320_drm_driver = { + .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC, + + .name = DRIVER_NAME, + .desc = DRIVER_DESC, + .date = DRIVER_DATE, + .major = DRIVER_MAJOR, + .minor = DRIVER_MINOR, + + .fops = &gm12u320_fops, + DRM_GEM_SHMEM_DRIVER_OPS, + .gem_prime_import = gm12u320_gem_prime_import, +}; + +static const struct drm_mode_config_funcs gm12u320_mode_config_funcs = { + .fb_create = drm_gem_fb_create_with_dirty, + .atomic_check = drm_atomic_helper_check, + .atomic_commit = drm_atomic_helper_commit, +}; + +static int gm12u320_usb_probe(struct usb_interface *interface, + const struct usb_device_id *id) +{ + struct gm12u320_device *gm12u320; + struct drm_device *dev; + int ret; + + /* + * The gm12u320 presents itself to the system as 2 usb mass-storage + * interfaces, we only care about / need the first one. + */ + if (interface->cur_altsetting->desc.bInterfaceNumber != 0) + return -ENODEV; + + gm12u320 = devm_drm_dev_alloc(&interface->dev, &gm12u320_drm_driver, + struct gm12u320_device, dev); + if (IS_ERR(gm12u320)) + return PTR_ERR(gm12u320); + dev = &gm12u320->dev; + + gm12u320->dmadev = usb_intf_get_dma_device(to_usb_interface(dev->dev)); + if (!gm12u320->dmadev) + drm_warn(dev, "buffer sharing not supported"); /* not an error */ + + INIT_DELAYED_WORK(&gm12u320->fb_update.work, gm12u320_fb_update_work); + mutex_init(&gm12u320->fb_update.lock); + + ret = drmm_mode_config_init(dev); + if (ret) + goto err_put_device; + + dev->mode_config.min_width = GM12U320_USER_WIDTH; + dev->mode_config.max_width = GM12U320_USER_WIDTH; + dev->mode_config.min_height = GM12U320_HEIGHT; + dev->mode_config.max_height = GM12U320_HEIGHT; + dev->mode_config.funcs = &gm12u320_mode_config_funcs; + + ret = gm12u320_usb_alloc(gm12u320); + if (ret) + goto err_put_device; + + ret = gm12u320_set_ecomode(gm12u320); + if (ret) + goto err_put_device; + + ret = gm12u320_conn_init(gm12u320); + if (ret) + goto err_put_device; + + ret = drm_simple_display_pipe_init(&gm12u320->dev, + &gm12u320->pipe, + &gm12u320_pipe_funcs, + gm12u320_pipe_formats, + ARRAY_SIZE(gm12u320_pipe_formats), + gm12u320_pipe_modifiers, + &gm12u320->conn); + if (ret) + goto err_put_device; + + drm_mode_config_reset(dev); + + usb_set_intfdata(interface, dev); + ret = drm_dev_register(dev, 0); + if (ret) + goto err_put_device; + + drm_fbdev_generic_setup(dev, 0); + + return 0; + +err_put_device: + put_device(gm12u320->dmadev); + return ret; +} + +static void gm12u320_usb_disconnect(struct usb_interface *interface) +{ + struct drm_device *dev = usb_get_intfdata(interface); + struct gm12u320_device *gm12u320 = to_gm12u320(dev); + + put_device(gm12u320->dmadev); + gm12u320->dmadev = NULL; + drm_dev_unplug(dev); + drm_atomic_helper_shutdown(dev); +} + +static __maybe_unused int gm12u320_suspend(struct usb_interface *interface, + pm_message_t message) +{ + struct drm_device *dev = usb_get_intfdata(interface); + + return drm_mode_config_helper_suspend(dev); +} + +static __maybe_unused int gm12u320_resume(struct usb_interface *interface) +{ + struct drm_device *dev = usb_get_intfdata(interface); + struct gm12u320_device *gm12u320 = to_gm12u320(dev); + + gm12u320_set_ecomode(gm12u320); + + return drm_mode_config_helper_resume(dev); +} + +static const struct usb_device_id id_table[] = { + { USB_DEVICE(0x1de1, 0xc102) }, + {}, +}; +MODULE_DEVICE_TABLE(usb, id_table); + +static struct usb_driver gm12u320_usb_driver = { + .name = "gm12u320", + .probe = gm12u320_usb_probe, + .disconnect = gm12u320_usb_disconnect, + .id_table = id_table, +#ifdef CONFIG_PM + .suspend = gm12u320_suspend, + .resume = gm12u320_resume, + .reset_resume = gm12u320_resume, +#endif +}; + +module_usb_driver(gm12u320_usb_driver); +MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/tiny/hx8357d.c b/drivers/gpu/drm/tiny/hx8357d.c new file mode 100644 index 000000000..48c24aa8c --- /dev/null +++ b/drivers/gpu/drm/tiny/hx8357d.c @@ -0,0 +1,294 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * DRM driver for the HX8357D LCD controller + * + * Copyright 2018 Broadcom + * Copyright 2018 David Lechner <david@lechnology.com> + * Copyright 2016 Noralf Trønnes + * Copyright (C) 2015 Adafruit Industries + * Copyright (C) 2013 Christian Vogelgsang + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/property.h> +#include <linux/spi/spi.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_gem_dma_helper.h> +#include <drm/drm_managed.h> +#include <drm/drm_mipi_dbi.h> +#include <drm/drm_modeset_helper.h> +#include <video/mipi_display.h> + +#define HX8357D_SETOSC 0xb0 +#define HX8357D_SETPOWER 0xb1 +#define HX8357D_SETRGB 0xb3 +#define HX8357D_SETCYC 0xb3 +#define HX8357D_SETCOM 0xb6 +#define HX8357D_SETEXTC 0xb9 +#define HX8357D_SETSTBA 0xc0 +#define HX8357D_SETPANEL 0xcc +#define HX8357D_SETGAMMA 0xe0 + +#define HX8357D_MADCTL_MY 0x80 +#define HX8357D_MADCTL_MX 0x40 +#define HX8357D_MADCTL_MV 0x20 +#define HX8357D_MADCTL_ML 0x10 +#define HX8357D_MADCTL_RGB 0x00 +#define HX8357D_MADCTL_BGR 0x08 +#define HX8357D_MADCTL_MH 0x04 + +static void yx240qv29_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state, + struct drm_plane_state *plane_state) +{ + struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev); + struct mipi_dbi *dbi = &dbidev->dbi; + u8 addr_mode; + int ret, idx; + + if (!drm_dev_enter(pipe->crtc.dev, &idx)) + return; + + DRM_DEBUG_KMS("\n"); + + ret = mipi_dbi_poweron_conditional_reset(dbidev); + if (ret < 0) + goto out_exit; + if (ret == 1) + goto out_enable; + + /* setextc */ + mipi_dbi_command(dbi, HX8357D_SETEXTC, 0xFF, 0x83, 0x57); + msleep(150); + + /* setRGB which also enables SDO */ + mipi_dbi_command(dbi, HX8357D_SETRGB, 0x00, 0x00, 0x06, 0x06); + + /* -1.52V */ + mipi_dbi_command(dbi, HX8357D_SETCOM, 0x25); + + /* Normal mode 70Hz, Idle mode 55 Hz */ + mipi_dbi_command(dbi, HX8357D_SETOSC, 0x68); + + /* Set Panel - BGR, Gate direction swapped */ + mipi_dbi_command(dbi, HX8357D_SETPANEL, 0x05); + + mipi_dbi_command(dbi, HX8357D_SETPOWER, + 0x00, /* Not deep standby */ + 0x15, /* BT */ + 0x1C, /* VSPR */ + 0x1C, /* VSNR */ + 0x83, /* AP */ + 0xAA); /* FS */ + + mipi_dbi_command(dbi, HX8357D_SETSTBA, + 0x50, /* OPON normal */ + 0x50, /* OPON idle */ + 0x01, /* STBA */ + 0x3C, /* STBA */ + 0x1E, /* STBA */ + 0x08); /* GEN */ + + mipi_dbi_command(dbi, HX8357D_SETCYC, + 0x02, /* NW 0x02 */ + 0x40, /* RTN */ + 0x00, /* DIV */ + 0x2A, /* DUM */ + 0x2A, /* DUM */ + 0x0D, /* GDON */ + 0x78); /* GDOFF */ + + mipi_dbi_command(dbi, HX8357D_SETGAMMA, + 0x02, + 0x0A, + 0x11, + 0x1d, + 0x23, + 0x35, + 0x41, + 0x4b, + 0x4b, + 0x42, + 0x3A, + 0x27, + 0x1B, + 0x08, + 0x09, + 0x03, + 0x02, + 0x0A, + 0x11, + 0x1d, + 0x23, + 0x35, + 0x41, + 0x4b, + 0x4b, + 0x42, + 0x3A, + 0x27, + 0x1B, + 0x08, + 0x09, + 0x03, + 0x00, + 0x01); + + /* 16 bit */ + mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, + MIPI_DCS_PIXEL_FMT_16BIT); + + /* TE off */ + mipi_dbi_command(dbi, MIPI_DCS_SET_TEAR_ON, 0x00); + + /* tear line */ + mipi_dbi_command(dbi, MIPI_DCS_SET_TEAR_SCANLINE, 0x00, 0x02); + + /* Exit Sleep */ + mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); + msleep(150); + + /* display on */ + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); + usleep_range(5000, 7000); + +out_enable: + switch (dbidev->rotation) { + default: + addr_mode = HX8357D_MADCTL_MX | HX8357D_MADCTL_MY; + break; + case 90: + addr_mode = HX8357D_MADCTL_MV | HX8357D_MADCTL_MY; + break; + case 180: + addr_mode = 0; + break; + case 270: + addr_mode = HX8357D_MADCTL_MV | HX8357D_MADCTL_MX; + break; + } + mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode); + mipi_dbi_enable_flush(dbidev, crtc_state, plane_state); +out_exit: + drm_dev_exit(idx); +} + +static const struct drm_simple_display_pipe_funcs hx8357d_pipe_funcs = { + .mode_valid = mipi_dbi_pipe_mode_valid, + .enable = yx240qv29_enable, + .disable = mipi_dbi_pipe_disable, + .update = mipi_dbi_pipe_update, +}; + +static const struct drm_display_mode yx350hv15_mode = { + DRM_SIMPLE_MODE(320, 480, 60, 75), +}; + +DEFINE_DRM_GEM_DMA_FOPS(hx8357d_fops); + +static const struct drm_driver hx8357d_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, + .fops = &hx8357d_fops, + DRM_GEM_DMA_DRIVER_OPS_VMAP, + .debugfs_init = mipi_dbi_debugfs_init, + .name = "hx8357d", + .desc = "HX8357D", + .date = "20181023", + .major = 1, + .minor = 0, +}; + +static const struct of_device_id hx8357d_of_match[] = { + { .compatible = "adafruit,yx350hv15" }, + { } +}; +MODULE_DEVICE_TABLE(of, hx8357d_of_match); + +static const struct spi_device_id hx8357d_id[] = { + { "yx350hv15", 0 }, + { } +}; +MODULE_DEVICE_TABLE(spi, hx8357d_id); + +static int hx8357d_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct mipi_dbi_dev *dbidev; + struct drm_device *drm; + struct gpio_desc *dc; + u32 rotation = 0; + int ret; + + dbidev = devm_drm_dev_alloc(dev, &hx8357d_driver, + struct mipi_dbi_dev, drm); + if (IS_ERR(dbidev)) + return PTR_ERR(dbidev); + + drm = &dbidev->drm; + + dc = devm_gpiod_get(dev, "dc", GPIOD_OUT_LOW); + if (IS_ERR(dc)) + return dev_err_probe(dev, PTR_ERR(dc), "Failed to get GPIO 'dc'\n"); + + dbidev->backlight = devm_of_find_backlight(dev); + if (IS_ERR(dbidev->backlight)) + return PTR_ERR(dbidev->backlight); + + device_property_read_u32(dev, "rotation", &rotation); + + ret = mipi_dbi_spi_init(spi, &dbidev->dbi, dc); + if (ret) + return ret; + + ret = mipi_dbi_dev_init(dbidev, &hx8357d_pipe_funcs, &yx350hv15_mode, rotation); + if (ret) + return ret; + + drm_mode_config_reset(drm); + + ret = drm_dev_register(drm, 0); + if (ret) + return ret; + + spi_set_drvdata(spi, drm); + + drm_fbdev_generic_setup(drm, 0); + + return 0; +} + +static void hx8357d_remove(struct spi_device *spi) +{ + struct drm_device *drm = spi_get_drvdata(spi); + + drm_dev_unplug(drm); + drm_atomic_helper_shutdown(drm); +} + +static void hx8357d_shutdown(struct spi_device *spi) +{ + drm_atomic_helper_shutdown(spi_get_drvdata(spi)); +} + +static struct spi_driver hx8357d_spi_driver = { + .driver = { + .name = "hx8357d", + .of_match_table = hx8357d_of_match, + }, + .id_table = hx8357d_id, + .probe = hx8357d_probe, + .remove = hx8357d_remove, + .shutdown = hx8357d_shutdown, +}; +module_spi_driver(hx8357d_spi_driver); + +MODULE_DESCRIPTION("HX8357D DRM driver"); +MODULE_AUTHOR("Eric Anholt <eric@anholt.net>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/tiny/ili9163.c b/drivers/gpu/drm/tiny/ili9163.c new file mode 100644 index 000000000..9a1a5943b --- /dev/null +++ b/drivers/gpu/drm/tiny/ili9163.c @@ -0,0 +1,224 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/property.h> +#include <linux/spi/spi.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_gem_dma_helper.h> +#include <drm/drm_mipi_dbi.h> +#include <drm/drm_modeset_helper.h> + +#include <video/mipi_display.h> + +#define ILI9163_FRMCTR1 0xb1 + +#define ILI9163_PWCTRL1 0xc0 +#define ILI9163_PWCTRL2 0xc1 +#define ILI9163_VMCTRL1 0xc5 +#define ILI9163_VMCTRL2 0xc7 +#define ILI9163_PWCTRLA 0xcb +#define ILI9163_PWCTRLB 0xcf + +#define ILI9163_EN3GAM 0xf2 + +#define ILI9163_MADCTL_BGR BIT(3) +#define ILI9163_MADCTL_MV BIT(5) +#define ILI9163_MADCTL_MX BIT(6) +#define ILI9163_MADCTL_MY BIT(7) + +static void yx240qv29_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state, + struct drm_plane_state *plane_state) +{ + struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev); + struct mipi_dbi *dbi = &dbidev->dbi; + u8 addr_mode; + int ret, idx; + + if (!drm_dev_enter(pipe->crtc.dev, &idx)) + return; + + DRM_DEBUG_KMS("\n"); + + ret = mipi_dbi_poweron_conditional_reset(dbidev); + if (ret < 0) + goto out_exit; + if (ret == 1) + goto out_enable; + + /* Gamma */ + mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x04); + mipi_dbi_command(dbi, ILI9163_EN3GAM, 0x00); + + /* Frame Rate */ + mipi_dbi_command(dbi, ILI9163_FRMCTR1, 0x0a, 0x14); + + /* Power Control */ + mipi_dbi_command(dbi, ILI9163_PWCTRL1, 0x0a, 0x00); + mipi_dbi_command(dbi, ILI9163_PWCTRL2, 0x02); + + /* VCOM */ + mipi_dbi_command(dbi, ILI9163_VMCTRL1, 0x2f, 0x3e); + mipi_dbi_command(dbi, ILI9163_VMCTRL2, 0x40); + + /* Memory Access Control */ + mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT); + + mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); + msleep(100); + + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); + msleep(100); + +out_enable: + switch (dbidev->rotation) { + default: + addr_mode = ILI9163_MADCTL_MX | ILI9163_MADCTL_MY; + break; + case 90: + addr_mode = ILI9163_MADCTL_MX | ILI9163_MADCTL_MV; + break; + case 180: + addr_mode = 0; + break; + case 270: + addr_mode = ILI9163_MADCTL_MY | ILI9163_MADCTL_MV; + break; + } + addr_mode |= ILI9163_MADCTL_BGR; + mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode); + mipi_dbi_enable_flush(dbidev, crtc_state, plane_state); +out_exit: + drm_dev_exit(idx); +} + +static const struct drm_simple_display_pipe_funcs ili9163_pipe_funcs = { + .mode_valid = mipi_dbi_pipe_mode_valid, + .enable = yx240qv29_enable, + .disable = mipi_dbi_pipe_disable, + .update = mipi_dbi_pipe_update, + .prepare_fb = drm_gem_simple_display_pipe_prepare_fb, +}; + +static const struct drm_display_mode yx240qv29_mode = { + DRM_SIMPLE_MODE(128, 160, 28, 35), +}; + +DEFINE_DRM_GEM_DMA_FOPS(ili9163_fops); + +static struct drm_driver ili9163_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, + .fops = &ili9163_fops, + DRM_GEM_DMA_DRIVER_OPS_VMAP, + .debugfs_init = mipi_dbi_debugfs_init, + .name = "ili9163", + .desc = "Ilitek ILI9163", + .date = "20210208", + .major = 1, + .minor = 0, +}; + +static const struct of_device_id ili9163_of_match[] = { + { .compatible = "newhaven,1.8-128160EF" }, + { } +}; +MODULE_DEVICE_TABLE(of, ili9163_of_match); + +static const struct spi_device_id ili9163_id[] = { + { "nhd-1.8-128160EF", 0 }, + { } +}; +MODULE_DEVICE_TABLE(spi, ili9163_id); + +static int ili9163_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct mipi_dbi_dev *dbidev; + struct drm_device *drm; + struct mipi_dbi *dbi; + struct gpio_desc *dc; + u32 rotation = 0; + int ret; + + dbidev = devm_drm_dev_alloc(dev, &ili9163_driver, + struct mipi_dbi_dev, drm); + if (IS_ERR(dbidev)) + return PTR_ERR(dbidev); + + dbi = &dbidev->dbi; + drm = &dbidev->drm; + + spi_set_drvdata(spi, drm); + + dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(dbi->reset)) { + DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n"); + return PTR_ERR(dbi->reset); + } + + dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW); + if (IS_ERR(dc)) { + DRM_DEV_ERROR(dev, "Failed to get gpio 'dc'\n"); + return PTR_ERR(dc); + } + + dbidev->backlight = devm_of_find_backlight(dev); + if (IS_ERR(dbidev->backlight)) + return PTR_ERR(dbidev->backlight); + + device_property_read_u32(dev, "rotation", &rotation); + + ret = mipi_dbi_spi_init(spi, dbi, dc); + if (ret) + return ret; + + ret = mipi_dbi_dev_init(dbidev, &ili9163_pipe_funcs, &yx240qv29_mode, rotation); + if (ret) + return ret; + + drm_mode_config_reset(drm); + + ret = drm_dev_register(drm, 0); + if (ret) + return ret; + + drm_fbdev_generic_setup(drm, 0); + + return 0; +} + +static void ili9163_remove(struct spi_device *spi) +{ + struct drm_device *drm = spi_get_drvdata(spi); + + drm_dev_unplug(drm); + drm_atomic_helper_shutdown(drm); +} + +static void ili9163_shutdown(struct spi_device *spi) +{ + drm_atomic_helper_shutdown(spi_get_drvdata(spi)); +} + +static struct spi_driver ili9163_spi_driver = { + .driver = { + .name = "ili9163", + .of_match_table = ili9163_of_match, + }, + .id_table = ili9163_id, + .probe = ili9163_probe, + .remove = ili9163_remove, + .shutdown = ili9163_shutdown, +}; +module_spi_driver(ili9163_spi_driver); + +MODULE_DESCRIPTION("Ilitek ILI9163 DRM driver"); +MODULE_AUTHOR("Daniel Mack <daniel@zonque.org>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/tiny/ili9225.c b/drivers/gpu/drm/tiny/ili9225.c new file mode 100644 index 000000000..a79da2b4a --- /dev/null +++ b/drivers/gpu/drm/tiny/ili9225.c @@ -0,0 +1,443 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * DRM driver for Ilitek ILI9225 panels + * + * Copyright 2017 David Lechner <david@lechnology.com> + * + * Some code copied from mipi-dbi.c + * Copyright 2016 Noralf Trønnes + */ + +#include <linux/delay.h> +#include <linux/dma-buf.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/property.h> +#include <linux/spi/spi.h> +#include <video/mipi_display.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_damage_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_fb_dma_helper.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_fourcc.h> +#include <drm/drm_framebuffer.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_gem_dma_helper.h> +#include <drm/drm_managed.h> +#include <drm/drm_mipi_dbi.h> +#include <drm/drm_rect.h> + +#define ILI9225_DRIVER_READ_CODE 0x00 +#define ILI9225_DRIVER_OUTPUT_CONTROL 0x01 +#define ILI9225_LCD_AC_DRIVING_CONTROL 0x02 +#define ILI9225_ENTRY_MODE 0x03 +#define ILI9225_DISPLAY_CONTROL_1 0x07 +#define ILI9225_BLANK_PERIOD_CONTROL_1 0x08 +#define ILI9225_FRAME_CYCLE_CONTROL 0x0b +#define ILI9225_INTERFACE_CONTROL 0x0c +#define ILI9225_OSCILLATION_CONTROL 0x0f +#define ILI9225_POWER_CONTROL_1 0x10 +#define ILI9225_POWER_CONTROL_2 0x11 +#define ILI9225_POWER_CONTROL_3 0x12 +#define ILI9225_POWER_CONTROL_4 0x13 +#define ILI9225_POWER_CONTROL_5 0x14 +#define ILI9225_VCI_RECYCLING 0x15 +#define ILI9225_RAM_ADDRESS_SET_1 0x20 +#define ILI9225_RAM_ADDRESS_SET_2 0x21 +#define ILI9225_WRITE_DATA_TO_GRAM 0x22 +#define ILI9225_SOFTWARE_RESET 0x28 +#define ILI9225_GATE_SCAN_CONTROL 0x30 +#define ILI9225_VERTICAL_SCROLL_1 0x31 +#define ILI9225_VERTICAL_SCROLL_2 0x32 +#define ILI9225_VERTICAL_SCROLL_3 0x33 +#define ILI9225_PARTIAL_DRIVING_POS_1 0x34 +#define ILI9225_PARTIAL_DRIVING_POS_2 0x35 +#define ILI9225_HORIZ_WINDOW_ADDR_1 0x36 +#define ILI9225_HORIZ_WINDOW_ADDR_2 0x37 +#define ILI9225_VERT_WINDOW_ADDR_1 0x38 +#define ILI9225_VERT_WINDOW_ADDR_2 0x39 +#define ILI9225_GAMMA_CONTROL_1 0x50 +#define ILI9225_GAMMA_CONTROL_2 0x51 +#define ILI9225_GAMMA_CONTROL_3 0x52 +#define ILI9225_GAMMA_CONTROL_4 0x53 +#define ILI9225_GAMMA_CONTROL_5 0x54 +#define ILI9225_GAMMA_CONTROL_6 0x55 +#define ILI9225_GAMMA_CONTROL_7 0x56 +#define ILI9225_GAMMA_CONTROL_8 0x57 +#define ILI9225_GAMMA_CONTROL_9 0x58 +#define ILI9225_GAMMA_CONTROL_10 0x59 + +static inline int ili9225_command(struct mipi_dbi *dbi, u8 cmd, u16 data) +{ + u8 par[2] = { data >> 8, data & 0xff }; + + return mipi_dbi_command_buf(dbi, cmd, par, 2); +} + +static void ili9225_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect) +{ + struct drm_gem_dma_object *dma_obj = drm_fb_dma_get_gem_obj(fb, 0); + struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(fb->dev); + unsigned int height = rect->y2 - rect->y1; + unsigned int width = rect->x2 - rect->x1; + struct mipi_dbi *dbi = &dbidev->dbi; + bool swap = dbi->swap_bytes; + u16 x_start, y_start; + u16 x1, x2, y1, y2; + int idx, ret = 0; + bool full; + void *tr; + + if (!drm_dev_enter(fb->dev, &idx)) + return; + + full = width == fb->width && height == fb->height; + + DRM_DEBUG_KMS("Flushing [FB:%d] " DRM_RECT_FMT "\n", fb->base.id, DRM_RECT_ARG(rect)); + + if (!dbi->dc || !full || swap || + fb->format->format == DRM_FORMAT_XRGB8888) { + tr = dbidev->tx_buf; + ret = mipi_dbi_buf_copy(dbidev->tx_buf, fb, rect, swap); + if (ret) + goto err_msg; + } else { + tr = dma_obj->vaddr; + } + + switch (dbidev->rotation) { + default: + x1 = rect->x1; + x2 = rect->x2 - 1; + y1 = rect->y1; + y2 = rect->y2 - 1; + x_start = x1; + y_start = y1; + break; + case 90: + x1 = rect->y1; + x2 = rect->y2 - 1; + y1 = fb->width - rect->x2; + y2 = fb->width - rect->x1 - 1; + x_start = x1; + y_start = y2; + break; + case 180: + x1 = fb->width - rect->x2; + x2 = fb->width - rect->x1 - 1; + y1 = fb->height - rect->y2; + y2 = fb->height - rect->y1 - 1; + x_start = x2; + y_start = y2; + break; + case 270: + x1 = fb->height - rect->y2; + x2 = fb->height - rect->y1 - 1; + y1 = rect->x1; + y2 = rect->x2 - 1; + x_start = x2; + y_start = y1; + break; + } + + ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_1, x2); + ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_2, x1); + ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_1, y2); + ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_2, y1); + + ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, x_start); + ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, y_start); + + ret = mipi_dbi_command_buf(dbi, ILI9225_WRITE_DATA_TO_GRAM, tr, + width * height * 2); +err_msg: + if (ret) + dev_err_once(fb->dev->dev, "Failed to update display %d\n", ret); + + drm_dev_exit(idx); +} + +static void ili9225_pipe_update(struct drm_simple_display_pipe *pipe, + struct drm_plane_state *old_state) +{ + struct drm_plane_state *state = pipe->plane.state; + struct drm_rect rect; + + if (!pipe->crtc.state->active) + return; + + if (drm_atomic_helper_damage_merged(old_state, state, &rect)) + ili9225_fb_dirty(state->fb, &rect); +} + +static void ili9225_pipe_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state, + struct drm_plane_state *plane_state) +{ + struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev); + struct drm_framebuffer *fb = plane_state->fb; + struct device *dev = pipe->crtc.dev->dev; + struct mipi_dbi *dbi = &dbidev->dbi; + struct drm_rect rect = { + .x1 = 0, + .x2 = fb->width, + .y1 = 0, + .y2 = fb->height, + }; + int ret, idx; + u8 am_id; + + if (!drm_dev_enter(pipe->crtc.dev, &idx)) + return; + + DRM_DEBUG_KMS("\n"); + + mipi_dbi_hw_reset(dbi); + + /* + * There don't seem to be two example init sequences that match, so + * using the one from the popular Arduino library for this display. + * https://github.com/Nkawu/TFT_22_ILI9225/blob/master/src/TFT_22_ILI9225.cpp + */ + + ret = ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0000); + if (ret) { + DRM_DEV_ERROR(dev, "Error sending command %d\n", ret); + goto out_exit; + } + ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0000); + ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x0000); + ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x0000); + ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x0000); + + msleep(40); + + ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0018); + ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x6121); + ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x006f); + ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x495f); + ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0800); + + msleep(10); + + ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x103b); + + msleep(50); + + switch (dbidev->rotation) { + default: + am_id = 0x30; + break; + case 90: + am_id = 0x18; + break; + case 180: + am_id = 0x00; + break; + case 270: + am_id = 0x28; + break; + } + ili9225_command(dbi, ILI9225_DRIVER_OUTPUT_CONTROL, 0x011c); + ili9225_command(dbi, ILI9225_LCD_AC_DRIVING_CONTROL, 0x0100); + ili9225_command(dbi, ILI9225_ENTRY_MODE, 0x1000 | am_id); + ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000); + ili9225_command(dbi, ILI9225_BLANK_PERIOD_CONTROL_1, 0x0808); + ili9225_command(dbi, ILI9225_FRAME_CYCLE_CONTROL, 0x1100); + ili9225_command(dbi, ILI9225_INTERFACE_CONTROL, 0x0000); + ili9225_command(dbi, ILI9225_OSCILLATION_CONTROL, 0x0d01); + ili9225_command(dbi, ILI9225_VCI_RECYCLING, 0x0020); + ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, 0x0000); + ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, 0x0000); + + ili9225_command(dbi, ILI9225_GATE_SCAN_CONTROL, 0x0000); + ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_1, 0x00db); + ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_2, 0x0000); + ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_3, 0x0000); + ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_1, 0x00db); + ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_2, 0x0000); + + ili9225_command(dbi, ILI9225_GAMMA_CONTROL_1, 0x0000); + ili9225_command(dbi, ILI9225_GAMMA_CONTROL_2, 0x0808); + ili9225_command(dbi, ILI9225_GAMMA_CONTROL_3, 0x080a); + ili9225_command(dbi, ILI9225_GAMMA_CONTROL_4, 0x000a); + ili9225_command(dbi, ILI9225_GAMMA_CONTROL_5, 0x0a08); + ili9225_command(dbi, ILI9225_GAMMA_CONTROL_6, 0x0808); + ili9225_command(dbi, ILI9225_GAMMA_CONTROL_7, 0x0000); + ili9225_command(dbi, ILI9225_GAMMA_CONTROL_8, 0x0a00); + ili9225_command(dbi, ILI9225_GAMMA_CONTROL_9, 0x0710); + ili9225_command(dbi, ILI9225_GAMMA_CONTROL_10, 0x0710); + + ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0012); + + msleep(50); + + ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x1017); + + ili9225_fb_dirty(fb, &rect); +out_exit: + drm_dev_exit(idx); +} + +static void ili9225_pipe_disable(struct drm_simple_display_pipe *pipe) +{ + struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev); + struct mipi_dbi *dbi = &dbidev->dbi; + + DRM_DEBUG_KMS("\n"); + + /* + * This callback is not protected by drm_dev_enter/exit since we want to + * turn off the display on regular driver unload. It's highly unlikely + * that the underlying SPI controller is gone should this be called after + * unplug. + */ + + ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000); + msleep(50); + ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0007); + msleep(50); + ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0a02); +} + +static int ili9225_dbi_command(struct mipi_dbi *dbi, u8 *cmd, u8 *par, + size_t num) +{ + struct spi_device *spi = dbi->spi; + unsigned int bpw = 8; + u32 speed_hz; + int ret; + + gpiod_set_value_cansleep(dbi->dc, 0); + speed_hz = mipi_dbi_spi_cmd_max_speed(spi, 1); + ret = mipi_dbi_spi_transfer(spi, speed_hz, 8, cmd, 1); + if (ret || !num) + return ret; + + if (*cmd == ILI9225_WRITE_DATA_TO_GRAM && !dbi->swap_bytes) + bpw = 16; + + gpiod_set_value_cansleep(dbi->dc, 1); + speed_hz = mipi_dbi_spi_cmd_max_speed(spi, num); + + return mipi_dbi_spi_transfer(spi, speed_hz, bpw, par, num); +} + +static const struct drm_simple_display_pipe_funcs ili9225_pipe_funcs = { + .enable = ili9225_pipe_enable, + .disable = ili9225_pipe_disable, + .update = ili9225_pipe_update, +}; + +static const struct drm_display_mode ili9225_mode = { + DRM_SIMPLE_MODE(176, 220, 35, 44), +}; + +DEFINE_DRM_GEM_DMA_FOPS(ili9225_fops); + +static const struct drm_driver ili9225_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, + .fops = &ili9225_fops, + DRM_GEM_DMA_DRIVER_OPS_VMAP, + .name = "ili9225", + .desc = "Ilitek ILI9225", + .date = "20171106", + .major = 1, + .minor = 0, +}; + +static const struct of_device_id ili9225_of_match[] = { + { .compatible = "vot,v220hf01a-t" }, + {}, +}; +MODULE_DEVICE_TABLE(of, ili9225_of_match); + +static const struct spi_device_id ili9225_id[] = { + { "v220hf01a-t", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(spi, ili9225_id); + +static int ili9225_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct mipi_dbi_dev *dbidev; + struct drm_device *drm; + struct mipi_dbi *dbi; + struct gpio_desc *rs; + u32 rotation = 0; + int ret; + + dbidev = devm_drm_dev_alloc(dev, &ili9225_driver, + struct mipi_dbi_dev, drm); + if (IS_ERR(dbidev)) + return PTR_ERR(dbidev); + + dbi = &dbidev->dbi; + drm = &dbidev->drm; + + dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(dbi->reset)) + return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n"); + + rs = devm_gpiod_get(dev, "rs", GPIOD_OUT_LOW); + if (IS_ERR(rs)) + return dev_err_probe(dev, PTR_ERR(rs), "Failed to get GPIO 'rs'\n"); + + device_property_read_u32(dev, "rotation", &rotation); + + ret = mipi_dbi_spi_init(spi, dbi, rs); + if (ret) + return ret; + + /* override the command function set in mipi_dbi_spi_init() */ + dbi->command = ili9225_dbi_command; + + ret = mipi_dbi_dev_init(dbidev, &ili9225_pipe_funcs, &ili9225_mode, rotation); + if (ret) + return ret; + + drm_mode_config_reset(drm); + + ret = drm_dev_register(drm, 0); + if (ret) + return ret; + + spi_set_drvdata(spi, drm); + + drm_fbdev_generic_setup(drm, 0); + + return 0; +} + +static void ili9225_remove(struct spi_device *spi) +{ + struct drm_device *drm = spi_get_drvdata(spi); + + drm_dev_unplug(drm); + drm_atomic_helper_shutdown(drm); +} + +static void ili9225_shutdown(struct spi_device *spi) +{ + drm_atomic_helper_shutdown(spi_get_drvdata(spi)); +} + +static struct spi_driver ili9225_spi_driver = { + .driver = { + .name = "ili9225", + .owner = THIS_MODULE, + .of_match_table = ili9225_of_match, + }, + .id_table = ili9225_id, + .probe = ili9225_probe, + .remove = ili9225_remove, + .shutdown = ili9225_shutdown, +}; +module_spi_driver(ili9225_spi_driver); + +MODULE_DESCRIPTION("Ilitek ILI9225 DRM driver"); +MODULE_AUTHOR("David Lechner <david@lechnology.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/tiny/ili9341.c b/drivers/gpu/drm/tiny/ili9341.c new file mode 100644 index 000000000..69b265e78 --- /dev/null +++ b/drivers/gpu/drm/tiny/ili9341.c @@ -0,0 +1,256 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * DRM driver for Ilitek ILI9341 panels + * + * Copyright 2018 David Lechner <david@lechnology.com> + * + * Based on mi0283qt.c: + * Copyright 2016 Noralf Trønnes + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/property.h> +#include <linux/spi/spi.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_gem_dma_helper.h> +#include <drm/drm_managed.h> +#include <drm/drm_mipi_dbi.h> +#include <drm/drm_modeset_helper.h> +#include <video/mipi_display.h> + +#define ILI9341_FRMCTR1 0xb1 +#define ILI9341_DISCTRL 0xb6 +#define ILI9341_ETMOD 0xb7 + +#define ILI9341_PWCTRL1 0xc0 +#define ILI9341_PWCTRL2 0xc1 +#define ILI9341_VMCTRL1 0xc5 +#define ILI9341_VMCTRL2 0xc7 +#define ILI9341_PWCTRLA 0xcb +#define ILI9341_PWCTRLB 0xcf + +#define ILI9341_PGAMCTRL 0xe0 +#define ILI9341_NGAMCTRL 0xe1 +#define ILI9341_DTCTRLA 0xe8 +#define ILI9341_DTCTRLB 0xea +#define ILI9341_PWRSEQ 0xed + +#define ILI9341_EN3GAM 0xf2 +#define ILI9341_PUMPCTRL 0xf7 + +#define ILI9341_MADCTL_BGR BIT(3) +#define ILI9341_MADCTL_MV BIT(5) +#define ILI9341_MADCTL_MX BIT(6) +#define ILI9341_MADCTL_MY BIT(7) + +static void yx240qv29_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state, + struct drm_plane_state *plane_state) +{ + struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev); + struct mipi_dbi *dbi = &dbidev->dbi; + u8 addr_mode; + int ret, idx; + + if (!drm_dev_enter(pipe->crtc.dev, &idx)) + return; + + DRM_DEBUG_KMS("\n"); + + ret = mipi_dbi_poweron_conditional_reset(dbidev); + if (ret < 0) + goto out_exit; + if (ret == 1) + goto out_enable; + + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF); + + mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0xc1, 0x30); + mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81); + mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x00, 0x78); + mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02); + mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20); + mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00); + + /* Power Control */ + mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x23); + mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x10); + /* VCOM */ + mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x3e, 0x28); + mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0x86); + + /* Memory Access Control */ + mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT); + + /* Frame Rate */ + mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b); + + /* Gamma */ + mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x00); + mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01); + mipi_dbi_command(dbi, ILI9341_PGAMCTRL, + 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1, + 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00); + mipi_dbi_command(dbi, ILI9341_NGAMCTRL, + 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1, + 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f); + + /* DDRAM */ + mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07); + + /* Display */ + mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x08, 0x82, 0x27, 0x00); + mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); + msleep(100); + + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); + msleep(100); + +out_enable: + switch (dbidev->rotation) { + default: + addr_mode = ILI9341_MADCTL_MX; + break; + case 90: + addr_mode = ILI9341_MADCTL_MV; + break; + case 180: + addr_mode = ILI9341_MADCTL_MY; + break; + case 270: + addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY | + ILI9341_MADCTL_MX; + break; + } + addr_mode |= ILI9341_MADCTL_BGR; + mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode); + mipi_dbi_enable_flush(dbidev, crtc_state, plane_state); +out_exit: + drm_dev_exit(idx); +} + +static const struct drm_simple_display_pipe_funcs ili9341_pipe_funcs = { + .mode_valid = mipi_dbi_pipe_mode_valid, + .enable = yx240qv29_enable, + .disable = mipi_dbi_pipe_disable, + .update = mipi_dbi_pipe_update, +}; + +static const struct drm_display_mode yx240qv29_mode = { + DRM_SIMPLE_MODE(240, 320, 37, 49), +}; + +DEFINE_DRM_GEM_DMA_FOPS(ili9341_fops); + +static const struct drm_driver ili9341_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, + .fops = &ili9341_fops, + DRM_GEM_DMA_DRIVER_OPS_VMAP, + .debugfs_init = mipi_dbi_debugfs_init, + .name = "ili9341", + .desc = "Ilitek ILI9341", + .date = "20180514", + .major = 1, + .minor = 0, +}; + +static const struct of_device_id ili9341_of_match[] = { + { .compatible = "adafruit,yx240qv29" }, + { } +}; +MODULE_DEVICE_TABLE(of, ili9341_of_match); + +static const struct spi_device_id ili9341_id[] = { + { "yx240qv29", 0 }, + { } +}; +MODULE_DEVICE_TABLE(spi, ili9341_id); + +static int ili9341_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct mipi_dbi_dev *dbidev; + struct drm_device *drm; + struct mipi_dbi *dbi; + struct gpio_desc *dc; + u32 rotation = 0; + int ret; + + dbidev = devm_drm_dev_alloc(dev, &ili9341_driver, + struct mipi_dbi_dev, drm); + if (IS_ERR(dbidev)) + return PTR_ERR(dbidev); + + dbi = &dbidev->dbi; + drm = &dbidev->drm; + + dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(dbi->reset)) + return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n"); + + dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW); + if (IS_ERR(dc)) + return dev_err_probe(dev, PTR_ERR(dc), "Failed to get GPIO 'dc'\n"); + + dbidev->backlight = devm_of_find_backlight(dev); + if (IS_ERR(dbidev->backlight)) + return PTR_ERR(dbidev->backlight); + + device_property_read_u32(dev, "rotation", &rotation); + + ret = mipi_dbi_spi_init(spi, dbi, dc); + if (ret) + return ret; + + ret = mipi_dbi_dev_init(dbidev, &ili9341_pipe_funcs, &yx240qv29_mode, rotation); + if (ret) + return ret; + + drm_mode_config_reset(drm); + + ret = drm_dev_register(drm, 0); + if (ret) + return ret; + + spi_set_drvdata(spi, drm); + + drm_fbdev_generic_setup(drm, 0); + + return 0; +} + +static void ili9341_remove(struct spi_device *spi) +{ + struct drm_device *drm = spi_get_drvdata(spi); + + drm_dev_unplug(drm); + drm_atomic_helper_shutdown(drm); +} + +static void ili9341_shutdown(struct spi_device *spi) +{ + drm_atomic_helper_shutdown(spi_get_drvdata(spi)); +} + +static struct spi_driver ili9341_spi_driver = { + .driver = { + .name = "ili9341", + .of_match_table = ili9341_of_match, + }, + .id_table = ili9341_id, + .probe = ili9341_probe, + .remove = ili9341_remove, + .shutdown = ili9341_shutdown, +}; +module_spi_driver(ili9341_spi_driver); + +MODULE_DESCRIPTION("Ilitek ILI9341 DRM driver"); +MODULE_AUTHOR("David Lechner <david@lechnology.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/tiny/ili9486.c b/drivers/gpu/drm/tiny/ili9486.c new file mode 100644 index 000000000..7b3048a3d --- /dev/null +++ b/drivers/gpu/drm/tiny/ili9486.c @@ -0,0 +1,279 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * DRM driver for Ilitek ILI9486 panels + * + * Copyright 2020 Kamlesh Gurudasani <kamlesh.gurudasani@gmail.com> + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/property.h> +#include <linux/spi/spi.h> + +#include <video/mipi_display.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_gem_dma_helper.h> +#include <drm/drm_managed.h> +#include <drm/drm_mipi_dbi.h> +#include <drm/drm_modeset_helper.h> + +#define ILI9486_ITFCTR1 0xb0 +#define ILI9486_PWCTRL1 0xc2 +#define ILI9486_VMCTRL1 0xc5 +#define ILI9486_PGAMCTRL 0xe0 +#define ILI9486_NGAMCTRL 0xe1 +#define ILI9486_DGAMCTRL 0xe2 +#define ILI9486_MADCTL_BGR BIT(3) +#define ILI9486_MADCTL_MV BIT(5) +#define ILI9486_MADCTL_MX BIT(6) +#define ILI9486_MADCTL_MY BIT(7) + +/* + * The PiScreen/waveshare rpi-lcd-35 has a SPI to 16-bit parallel bus converter + * in front of the display controller. This means that 8-bit values have to be + * transferred as 16-bit. + */ +static int waveshare_command(struct mipi_dbi *mipi, u8 *cmd, u8 *par, + size_t num) +{ + struct spi_device *spi = mipi->spi; + unsigned int bpw = 8; + void *data = par; + u32 speed_hz; + int i, ret; + __be16 *buf; + + buf = kmalloc(32 * sizeof(u16), GFP_KERNEL); + if (!buf) + return -ENOMEM; + + /* + * The displays are Raspberry Pi HATs and connected to the 8-bit only + * SPI controller, so 16-bit command and parameters need byte swapping + * before being transferred as 8-bit on the big endian SPI bus. + */ + buf[0] = cpu_to_be16(*cmd); + gpiod_set_value_cansleep(mipi->dc, 0); + speed_hz = mipi_dbi_spi_cmd_max_speed(spi, 2); + ret = mipi_dbi_spi_transfer(spi, speed_hz, 8, buf, 2); + if (ret || !num) + goto free; + + /* 8-bit configuration data, not 16-bit pixel data */ + if (num <= 32) { + for (i = 0; i < num; i++) + buf[i] = cpu_to_be16(par[i]); + num *= 2; + data = buf; + } + + /* + * Check whether pixel data bytes needs to be swapped or not + */ + if (*cmd == MIPI_DCS_WRITE_MEMORY_START && !mipi->swap_bytes) + bpw = 16; + + gpiod_set_value_cansleep(mipi->dc, 1); + speed_hz = mipi_dbi_spi_cmd_max_speed(spi, num); + ret = mipi_dbi_spi_transfer(spi, speed_hz, bpw, data, num); + free: + kfree(buf); + + return ret; +} + +static void waveshare_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state, + struct drm_plane_state *plane_state) +{ + struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev); + struct mipi_dbi *dbi = &dbidev->dbi; + u8 addr_mode; + int ret, idx; + + if (!drm_dev_enter(pipe->crtc.dev, &idx)) + return; + + DRM_DEBUG_KMS("\n"); + + ret = mipi_dbi_poweron_conditional_reset(dbidev); + if (ret < 0) + goto out_exit; + if (ret == 1) + goto out_enable; + + mipi_dbi_command(dbi, ILI9486_ITFCTR1); + mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); + msleep(250); + + mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, 0x55); + + mipi_dbi_command(dbi, ILI9486_PWCTRL1, 0x44); + + mipi_dbi_command(dbi, ILI9486_VMCTRL1, 0x00, 0x00, 0x00, 0x00); + + mipi_dbi_command(dbi, ILI9486_PGAMCTRL, + 0x0F, 0x1F, 0x1C, 0x0C, 0x0F, 0x08, 0x48, 0x98, + 0x37, 0x0A, 0x13, 0x04, 0x11, 0x0D, 0x0); + mipi_dbi_command(dbi, ILI9486_NGAMCTRL, + 0x0F, 0x32, 0x2E, 0x0B, 0x0D, 0x05, 0x47, 0x75, + 0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00); + mipi_dbi_command(dbi, ILI9486_DGAMCTRL, + 0x0F, 0x32, 0x2E, 0x0B, 0x0D, 0x05, 0x47, 0x75, + 0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00); + + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); + msleep(100); + + out_enable: + switch (dbidev->rotation) { + case 90: + addr_mode = ILI9486_MADCTL_MY; + break; + case 180: + addr_mode = ILI9486_MADCTL_MV; + break; + case 270: + addr_mode = ILI9486_MADCTL_MX; + break; + default: + addr_mode = ILI9486_MADCTL_MV | ILI9486_MADCTL_MY | + ILI9486_MADCTL_MX; + break; + } + addr_mode |= ILI9486_MADCTL_BGR; + mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode); + mipi_dbi_enable_flush(dbidev, crtc_state, plane_state); + out_exit: + drm_dev_exit(idx); +} + +static const struct drm_simple_display_pipe_funcs waveshare_pipe_funcs = { + .mode_valid = mipi_dbi_pipe_mode_valid, + .enable = waveshare_enable, + .disable = mipi_dbi_pipe_disable, + .update = mipi_dbi_pipe_update, +}; + +static const struct drm_display_mode waveshare_mode = { + DRM_SIMPLE_MODE(480, 320, 73, 49), +}; + +DEFINE_DRM_GEM_DMA_FOPS(ili9486_fops); + +static const struct drm_driver ili9486_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, + .fops = &ili9486_fops, + DRM_GEM_DMA_DRIVER_OPS_VMAP, + .debugfs_init = mipi_dbi_debugfs_init, + .name = "ili9486", + .desc = "Ilitek ILI9486", + .date = "20200118", + .major = 1, + .minor = 0, +}; + +static const struct of_device_id ili9486_of_match[] = { + { .compatible = "waveshare,rpi-lcd-35" }, + { .compatible = "ozzmaker,piscreen" }, + {}, +}; +MODULE_DEVICE_TABLE(of, ili9486_of_match); + +static const struct spi_device_id ili9486_id[] = { + { "ili9486", 0 }, + { } +}; +MODULE_DEVICE_TABLE(spi, ili9486_id); + +static int ili9486_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct mipi_dbi_dev *dbidev; + struct drm_device *drm; + struct mipi_dbi *dbi; + struct gpio_desc *dc; + u32 rotation = 0; + int ret; + + dbidev = devm_drm_dev_alloc(dev, &ili9486_driver, + struct mipi_dbi_dev, drm); + if (IS_ERR(dbidev)) + return PTR_ERR(dbidev); + + dbi = &dbidev->dbi; + drm = &dbidev->drm; + + dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(dbi->reset)) + return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n"); + + dc = devm_gpiod_get(dev, "dc", GPIOD_OUT_LOW); + if (IS_ERR(dc)) + return dev_err_probe(dev, PTR_ERR(dc), "Failed to get GPIO 'dc'\n"); + + dbidev->backlight = devm_of_find_backlight(dev); + if (IS_ERR(dbidev->backlight)) + return PTR_ERR(dbidev->backlight); + + device_property_read_u32(dev, "rotation", &rotation); + + ret = mipi_dbi_spi_init(spi, dbi, dc); + if (ret) + return ret; + + dbi->command = waveshare_command; + dbi->read_commands = NULL; + + ret = mipi_dbi_dev_init(dbidev, &waveshare_pipe_funcs, + &waveshare_mode, rotation); + if (ret) + return ret; + + drm_mode_config_reset(drm); + + ret = drm_dev_register(drm, 0); + if (ret) + return ret; + + spi_set_drvdata(spi, drm); + + drm_fbdev_generic_setup(drm, 0); + + return 0; +} + +static void ili9486_remove(struct spi_device *spi) +{ + struct drm_device *drm = spi_get_drvdata(spi); + + drm_dev_unplug(drm); + drm_atomic_helper_shutdown(drm); +} + +static void ili9486_shutdown(struct spi_device *spi) +{ + drm_atomic_helper_shutdown(spi_get_drvdata(spi)); +} + +static struct spi_driver ili9486_spi_driver = { + .driver = { + .name = "ili9486", + .of_match_table = ili9486_of_match, + }, + .id_table = ili9486_id, + .probe = ili9486_probe, + .remove = ili9486_remove, + .shutdown = ili9486_shutdown, +}; +module_spi_driver(ili9486_spi_driver); + +MODULE_DESCRIPTION("Ilitek ILI9486 DRM driver"); +MODULE_AUTHOR("Kamlesh Gurudasani <kamlesh.gurudasani@gmail.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/tiny/mi0283qt.c b/drivers/gpu/drm/tiny/mi0283qt.c new file mode 100644 index 000000000..bc522fb3d --- /dev/null +++ b/drivers/gpu/drm/tiny/mi0283qt.c @@ -0,0 +1,282 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * DRM driver for Multi-Inno MI0283QT panels + * + * Copyright 2016 Noralf Trønnes + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/property.h> +#include <linux/regulator/consumer.h> +#include <linux/spi/spi.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_gem_dma_helper.h> +#include <drm/drm_managed.h> +#include <drm/drm_mipi_dbi.h> +#include <drm/drm_modeset_helper.h> +#include <video/mipi_display.h> + +#define ILI9341_FRMCTR1 0xb1 +#define ILI9341_DISCTRL 0xb6 +#define ILI9341_ETMOD 0xb7 + +#define ILI9341_PWCTRL1 0xc0 +#define ILI9341_PWCTRL2 0xc1 +#define ILI9341_VMCTRL1 0xc5 +#define ILI9341_VMCTRL2 0xc7 +#define ILI9341_PWCTRLA 0xcb +#define ILI9341_PWCTRLB 0xcf + +#define ILI9341_PGAMCTRL 0xe0 +#define ILI9341_NGAMCTRL 0xe1 +#define ILI9341_DTCTRLA 0xe8 +#define ILI9341_DTCTRLB 0xea +#define ILI9341_PWRSEQ 0xed + +#define ILI9341_EN3GAM 0xf2 +#define ILI9341_PUMPCTRL 0xf7 + +#define ILI9341_MADCTL_BGR BIT(3) +#define ILI9341_MADCTL_MV BIT(5) +#define ILI9341_MADCTL_MX BIT(6) +#define ILI9341_MADCTL_MY BIT(7) + +static void mi0283qt_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state, + struct drm_plane_state *plane_state) +{ + struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev); + struct mipi_dbi *dbi = &dbidev->dbi; + u8 addr_mode; + int ret, idx; + + if (!drm_dev_enter(pipe->crtc.dev, &idx)) + return; + + DRM_DEBUG_KMS("\n"); + + ret = mipi_dbi_poweron_conditional_reset(dbidev); + if (ret < 0) + goto out_exit; + if (ret == 1) + goto out_enable; + + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF); + + mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0x83, 0x30); + mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81); + mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x01, 0x79); + mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02); + mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20); + mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00); + + /* Power Control */ + mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x26); + mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x11); + /* VCOM */ + mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x35, 0x3e); + mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0xbe); + + /* Memory Access Control */ + mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT); + + /* Frame Rate */ + mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b); + + /* Gamma */ + mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x08); + mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01); + mipi_dbi_command(dbi, ILI9341_PGAMCTRL, + 0x1f, 0x1a, 0x18, 0x0a, 0x0f, 0x06, 0x45, 0x87, + 0x32, 0x0a, 0x07, 0x02, 0x07, 0x05, 0x00); + mipi_dbi_command(dbi, ILI9341_NGAMCTRL, + 0x00, 0x25, 0x27, 0x05, 0x10, 0x09, 0x3a, 0x78, + 0x4d, 0x05, 0x18, 0x0d, 0x38, 0x3a, 0x1f); + + /* DDRAM */ + mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07); + + /* Display */ + mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x0a, 0x82, 0x27, 0x00); + mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); + msleep(100); + + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); + msleep(100); + +out_enable: + /* The PiTFT (ili9340) has a hardware reset circuit that + * resets only on power-on and not on each reboot through + * a gpio like the rpi-display does. + * As a result, we need to always apply the rotation value + * regardless of the display "on/off" state. + */ + switch (dbidev->rotation) { + default: + addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY | + ILI9341_MADCTL_MX; + break; + case 90: + addr_mode = ILI9341_MADCTL_MY; + break; + case 180: + addr_mode = ILI9341_MADCTL_MV; + break; + case 270: + addr_mode = ILI9341_MADCTL_MX; + break; + } + addr_mode |= ILI9341_MADCTL_BGR; + mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode); + mipi_dbi_enable_flush(dbidev, crtc_state, plane_state); +out_exit: + drm_dev_exit(idx); +} + +static const struct drm_simple_display_pipe_funcs mi0283qt_pipe_funcs = { + .mode_valid = mipi_dbi_pipe_mode_valid, + .enable = mi0283qt_enable, + .disable = mipi_dbi_pipe_disable, + .update = mipi_dbi_pipe_update, +}; + +static const struct drm_display_mode mi0283qt_mode = { + DRM_SIMPLE_MODE(320, 240, 58, 43), +}; + +DEFINE_DRM_GEM_DMA_FOPS(mi0283qt_fops); + +static const struct drm_driver mi0283qt_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, + .fops = &mi0283qt_fops, + DRM_GEM_DMA_DRIVER_OPS_VMAP, + .debugfs_init = mipi_dbi_debugfs_init, + .name = "mi0283qt", + .desc = "Multi-Inno MI0283QT", + .date = "20160614", + .major = 1, + .minor = 0, +}; + +static const struct of_device_id mi0283qt_of_match[] = { + { .compatible = "multi-inno,mi0283qt" }, + {}, +}; +MODULE_DEVICE_TABLE(of, mi0283qt_of_match); + +static const struct spi_device_id mi0283qt_id[] = { + { "mi0283qt", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(spi, mi0283qt_id); + +static int mi0283qt_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct mipi_dbi_dev *dbidev; + struct drm_device *drm; + struct mipi_dbi *dbi; + struct gpio_desc *dc; + u32 rotation = 0; + int ret; + + dbidev = devm_drm_dev_alloc(dev, &mi0283qt_driver, + struct mipi_dbi_dev, drm); + if (IS_ERR(dbidev)) + return PTR_ERR(dbidev); + + dbi = &dbidev->dbi; + drm = &dbidev->drm; + + dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(dbi->reset)) + return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n"); + + dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW); + if (IS_ERR(dc)) + return dev_err_probe(dev, PTR_ERR(dc), "Failed to get GPIO 'dc'\n"); + + dbidev->regulator = devm_regulator_get(dev, "power"); + if (IS_ERR(dbidev->regulator)) + return PTR_ERR(dbidev->regulator); + + dbidev->backlight = devm_of_find_backlight(dev); + if (IS_ERR(dbidev->backlight)) + return PTR_ERR(dbidev->backlight); + + device_property_read_u32(dev, "rotation", &rotation); + + ret = mipi_dbi_spi_init(spi, dbi, dc); + if (ret) + return ret; + + ret = mipi_dbi_dev_init(dbidev, &mi0283qt_pipe_funcs, &mi0283qt_mode, rotation); + if (ret) + return ret; + + drm_mode_config_reset(drm); + + ret = drm_dev_register(drm, 0); + if (ret) + return ret; + + spi_set_drvdata(spi, drm); + + drm_fbdev_generic_setup(drm, 0); + + return 0; +} + +static void mi0283qt_remove(struct spi_device *spi) +{ + struct drm_device *drm = spi_get_drvdata(spi); + + drm_dev_unplug(drm); + drm_atomic_helper_shutdown(drm); +} + +static void mi0283qt_shutdown(struct spi_device *spi) +{ + drm_atomic_helper_shutdown(spi_get_drvdata(spi)); +} + +static int __maybe_unused mi0283qt_pm_suspend(struct device *dev) +{ + return drm_mode_config_helper_suspend(dev_get_drvdata(dev)); +} + +static int __maybe_unused mi0283qt_pm_resume(struct device *dev) +{ + drm_mode_config_helper_resume(dev_get_drvdata(dev)); + + return 0; +} + +static const struct dev_pm_ops mi0283qt_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(mi0283qt_pm_suspend, mi0283qt_pm_resume) +}; + +static struct spi_driver mi0283qt_spi_driver = { + .driver = { + .name = "mi0283qt", + .owner = THIS_MODULE, + .of_match_table = mi0283qt_of_match, + .pm = &mi0283qt_pm_ops, + }, + .id_table = mi0283qt_id, + .probe = mi0283qt_probe, + .remove = mi0283qt_remove, + .shutdown = mi0283qt_shutdown, +}; +module_spi_driver(mi0283qt_spi_driver); + +MODULE_DESCRIPTION("Multi-Inno MI0283QT DRM driver"); +MODULE_AUTHOR("Noralf Trønnes"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/tiny/panel-mipi-dbi.c b/drivers/gpu/drm/tiny/panel-mipi-dbi.c new file mode 100644 index 000000000..955a61d62 --- /dev/null +++ b/drivers/gpu/drm/tiny/panel-mipi-dbi.c @@ -0,0 +1,397 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * DRM driver for MIPI DBI compatible display panels + * + * Copyright 2022 Noralf Trønnes + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/firmware.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/property.h> +#include <linux/regulator/consumer.h> +#include <linux/spi/spi.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_gem_dma_helper.h> +#include <drm/drm_managed.h> +#include <drm/drm_mipi_dbi.h> +#include <drm/drm_modes.h> +#include <drm/drm_modeset_helper.h> + +#include <video/mipi_display.h> + +static const u8 panel_mipi_dbi_magic[15] = { 'M', 'I', 'P', 'I', ' ', 'D', 'B', 'I', + 0, 0, 0, 0, 0, 0, 0 }; + +/* + * The display controller configuration is stored in a firmware file. + * The Device Tree 'compatible' property value with a '.bin' suffix is passed + * to request_firmware() to fetch this file. + */ +struct panel_mipi_dbi_config { + /* Magic string: panel_mipi_dbi_magic */ + u8 magic[15]; + + /* Config file format version */ + u8 file_format_version; + + /* + * MIPI commands to execute when the display pipeline is enabled. + * This is used to configure the display controller. + * + * The commands are stored in a byte array with the format: + * command, num_parameters, [ parameter, ...], command, ... + * + * Some commands require a pause before the next command can be received. + * Inserting a delay in the command sequence is done by using the NOP command with one + * parameter: delay in miliseconds (the No Operation command is part of the MIPI Display + * Command Set where it has no parameters). + * + * Example: + * command 0x11 + * sleep 120ms + * command 0xb1 parameters 0x01, 0x2c, 0x2d + * command 0x29 + * + * Byte sequence: + * 0x11 0x00 + * 0x00 0x01 0x78 + * 0xb1 0x03 0x01 0x2c 0x2d + * 0x29 0x00 + */ + u8 commands[]; +}; + +struct panel_mipi_dbi_commands { + const u8 *buf; + size_t len; +}; + +static struct panel_mipi_dbi_commands * +panel_mipi_dbi_check_commands(struct device *dev, const struct firmware *fw) +{ + const struct panel_mipi_dbi_config *config = (struct panel_mipi_dbi_config *)fw->data; + struct panel_mipi_dbi_commands *commands; + size_t size = fw->size, commands_len; + unsigned int i = 0; + + if (size < sizeof(*config) + 2) { /* At least 1 command */ + dev_err(dev, "config: file size=%zu is too small\n", size); + return ERR_PTR(-EINVAL); + } + + if (memcmp(config->magic, panel_mipi_dbi_magic, sizeof(config->magic))) { + dev_err(dev, "config: Bad magic: %15ph\n", config->magic); + return ERR_PTR(-EINVAL); + } + + if (config->file_format_version != 1) { + dev_err(dev, "config: version=%u is not supported\n", config->file_format_version); + return ERR_PTR(-EINVAL); + } + + drm_dev_dbg(dev, DRM_UT_DRIVER, "size=%zu version=%u\n", size, config->file_format_version); + + commands_len = size - sizeof(*config); + + while ((i + 1) < commands_len) { + u8 command = config->commands[i++]; + u8 num_parameters = config->commands[i++]; + const u8 *parameters = &config->commands[i]; + + i += num_parameters; + if (i > commands_len) { + dev_err(dev, "config: command=0x%02x num_parameters=%u overflows\n", + command, num_parameters); + return ERR_PTR(-EINVAL); + } + + if (command == 0x00 && num_parameters == 1) + drm_dev_dbg(dev, DRM_UT_DRIVER, "sleep %ums\n", parameters[0]); + else + drm_dev_dbg(dev, DRM_UT_DRIVER, "command %02x %*ph\n", + command, num_parameters, parameters); + } + + if (i != commands_len) { + dev_err(dev, "config: malformed command array\n"); + return ERR_PTR(-EINVAL); + } + + commands = devm_kzalloc(dev, sizeof(*commands), GFP_KERNEL); + if (!commands) + return ERR_PTR(-ENOMEM); + + commands->len = commands_len; + commands->buf = devm_kmemdup(dev, config->commands, commands->len, GFP_KERNEL); + if (!commands->buf) + return ERR_PTR(-ENOMEM); + + return commands; +} + +static struct panel_mipi_dbi_commands *panel_mipi_dbi_commands_from_fw(struct device *dev) +{ + struct panel_mipi_dbi_commands *commands; + const struct firmware *fw; + const char *compatible; + char fw_name[40]; + int ret; + + ret = of_property_read_string_index(dev->of_node, "compatible", 0, &compatible); + if (ret) + return ERR_PTR(ret); + + snprintf(fw_name, sizeof(fw_name), "%s.bin", compatible); + ret = request_firmware(&fw, fw_name, dev); + if (ret) { + dev_err(dev, "No config file found for compatible '%s' (error=%d)\n", + compatible, ret); + + return ERR_PTR(ret); + } + + commands = panel_mipi_dbi_check_commands(dev, fw); + release_firmware(fw); + + return commands; +} + +static void panel_mipi_dbi_commands_execute(struct mipi_dbi *dbi, + struct panel_mipi_dbi_commands *commands) +{ + unsigned int i = 0; + + if (!commands) + return; + + while (i < commands->len) { + u8 command = commands->buf[i++]; + u8 num_parameters = commands->buf[i++]; + const u8 *parameters = &commands->buf[i]; + + if (command == 0x00 && num_parameters == 1) + msleep(parameters[0]); + else if (num_parameters) + mipi_dbi_command_stackbuf(dbi, command, parameters, num_parameters); + else + mipi_dbi_command(dbi, command); + + i += num_parameters; + } +} + +static void panel_mipi_dbi_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state, + struct drm_plane_state *plane_state) +{ + struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev); + struct mipi_dbi *dbi = &dbidev->dbi; + int ret, idx; + + if (!drm_dev_enter(pipe->crtc.dev, &idx)) + return; + + drm_dbg(pipe->crtc.dev, "\n"); + + ret = mipi_dbi_poweron_conditional_reset(dbidev); + if (ret < 0) + goto out_exit; + if (!ret) + panel_mipi_dbi_commands_execute(dbi, dbidev->driver_private); + + mipi_dbi_enable_flush(dbidev, crtc_state, plane_state); +out_exit: + drm_dev_exit(idx); +} + +static const struct drm_simple_display_pipe_funcs panel_mipi_dbi_pipe_funcs = { + .mode_valid = mipi_dbi_pipe_mode_valid, + .enable = panel_mipi_dbi_enable, + .disable = mipi_dbi_pipe_disable, + .update = mipi_dbi_pipe_update, +}; + +DEFINE_DRM_GEM_DMA_FOPS(panel_mipi_dbi_fops); + +static const struct drm_driver panel_mipi_dbi_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, + .fops = &panel_mipi_dbi_fops, + DRM_GEM_DMA_DRIVER_OPS_VMAP, + .debugfs_init = mipi_dbi_debugfs_init, + .name = "panel-mipi-dbi", + .desc = "MIPI DBI compatible display panel", + .date = "20220103", + .major = 1, + .minor = 0, +}; + +static int panel_mipi_dbi_get_mode(struct mipi_dbi_dev *dbidev, struct drm_display_mode *mode) +{ + struct device *dev = dbidev->drm.dev; + u16 hback_porch, vback_porch; + int ret; + + ret = of_get_drm_panel_display_mode(dev->of_node, mode, NULL); + if (ret) { + dev_err(dev, "%pOF: failed to get panel-timing (error=%d)\n", dev->of_node, ret); + return ret; + } + + mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; + + hback_porch = mode->htotal - mode->hsync_end; + vback_porch = mode->vtotal - mode->vsync_end; + + /* + * Make sure width and height are set and that only back porch and + * pixelclock are set in the other timing values. Also check that + * width and height don't exceed the 16-bit value specified by MIPI DCS. + */ + if (!mode->hdisplay || !mode->vdisplay || mode->flags || + mode->hsync_end > mode->hdisplay || (hback_porch + mode->hdisplay) > 0xffff || + mode->vsync_end > mode->vdisplay || (vback_porch + mode->vdisplay) > 0xffff) { + dev_err(dev, "%pOF: panel-timing out of bounds\n", dev->of_node); + return -EINVAL; + } + + /* The driver doesn't use the pixel clock but it is mandatory so fake one if not set */ + if (!mode->clock) + mode->clock = mode->htotal * mode->vtotal * 60 / 1000; + + dbidev->top_offset = vback_porch; + dbidev->left_offset = hback_porch; + + return 0; +} + +static int panel_mipi_dbi_spi_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct drm_display_mode mode; + struct mipi_dbi_dev *dbidev; + struct drm_device *drm; + struct mipi_dbi *dbi; + struct gpio_desc *dc; + int ret; + + dbidev = devm_drm_dev_alloc(dev, &panel_mipi_dbi_driver, struct mipi_dbi_dev, drm); + if (IS_ERR(dbidev)) + return PTR_ERR(dbidev); + + dbi = &dbidev->dbi; + drm = &dbidev->drm; + + ret = panel_mipi_dbi_get_mode(dbidev, &mode); + if (ret) + return ret; + + dbidev->regulator = devm_regulator_get(dev, "power"); + if (IS_ERR(dbidev->regulator)) + return dev_err_probe(dev, PTR_ERR(dbidev->regulator), + "Failed to get regulator 'power'\n"); + + dbidev->backlight = devm_of_find_backlight(dev); + if (IS_ERR(dbidev->backlight)) + return dev_err_probe(dev, PTR_ERR(dbidev->backlight), "Failed to get backlight\n"); + + dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(dbi->reset)) + return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n"); + + dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW); + if (IS_ERR(dc)) + return dev_err_probe(dev, PTR_ERR(dc), "Failed to get GPIO 'dc'\n"); + + ret = mipi_dbi_spi_init(spi, dbi, dc); + if (ret) + return ret; + + if (device_property_present(dev, "write-only")) + dbi->read_commands = NULL; + + dbidev->driver_private = panel_mipi_dbi_commands_from_fw(dev); + if (IS_ERR(dbidev->driver_private)) + return PTR_ERR(dbidev->driver_private); + + ret = mipi_dbi_dev_init(dbidev, &panel_mipi_dbi_pipe_funcs, &mode, 0); + if (ret) + return ret; + + drm_mode_config_reset(drm); + + ret = drm_dev_register(drm, 0); + if (ret) + return ret; + + spi_set_drvdata(spi, drm); + + drm_fbdev_generic_setup(drm, 0); + + return 0; +} + +static void panel_mipi_dbi_spi_remove(struct spi_device *spi) +{ + struct drm_device *drm = spi_get_drvdata(spi); + + drm_dev_unplug(drm); + drm_atomic_helper_shutdown(drm); +} + +static void panel_mipi_dbi_spi_shutdown(struct spi_device *spi) +{ + drm_atomic_helper_shutdown(spi_get_drvdata(spi)); +} + +static int __maybe_unused panel_mipi_dbi_pm_suspend(struct device *dev) +{ + return drm_mode_config_helper_suspend(dev_get_drvdata(dev)); +} + +static int __maybe_unused panel_mipi_dbi_pm_resume(struct device *dev) +{ + drm_mode_config_helper_resume(dev_get_drvdata(dev)); + + return 0; +} + +static const struct dev_pm_ops panel_mipi_dbi_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(panel_mipi_dbi_pm_suspend, panel_mipi_dbi_pm_resume) +}; + +static const struct of_device_id panel_mipi_dbi_spi_of_match[] = { + { .compatible = "panel-mipi-dbi-spi" }, + {}, +}; +MODULE_DEVICE_TABLE(of, panel_mipi_dbi_spi_of_match); + +static const struct spi_device_id panel_mipi_dbi_spi_id[] = { + { "panel-mipi-dbi-spi", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(spi, panel_mipi_dbi_spi_id); + +static struct spi_driver panel_mipi_dbi_spi_driver = { + .driver = { + .name = "panel-mipi-dbi-spi", + .owner = THIS_MODULE, + .of_match_table = panel_mipi_dbi_spi_of_match, + .pm = &panel_mipi_dbi_pm_ops, + }, + .id_table = panel_mipi_dbi_spi_id, + .probe = panel_mipi_dbi_spi_probe, + .remove = panel_mipi_dbi_spi_remove, + .shutdown = panel_mipi_dbi_spi_shutdown, +}; +module_spi_driver(panel_mipi_dbi_spi_driver); + +MODULE_DESCRIPTION("MIPI DBI compatible display panel driver"); +MODULE_AUTHOR("Noralf Trønnes"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/tiny/repaper.c b/drivers/gpu/drm/tiny/repaper.c new file mode 100644 index 000000000..7e2b0e224 --- /dev/null +++ b/drivers/gpu/drm/tiny/repaper.c @@ -0,0 +1,1149 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * DRM driver for Pervasive Displays RePaper branded e-ink panels + * + * Copyright 2013-2017 Pervasive Displays, Inc. + * Copyright 2017 Noralf Trønnes + * + * The driver supports: + * Material Film: Aurora Mb (V231) + * Driver IC: G2 (eTC) + * + * The controller code was taken from the userspace driver: + * https://github.com/repaper/gratis + */ + +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/property.h> +#include <linux/sched/clock.h> +#include <linux/spi/spi.h> +#include <linux/thermal.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_connector.h> +#include <drm/drm_damage_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_fb_dma_helper.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_format_helper.h> +#include <drm/drm_framebuffer.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_gem_dma_helper.h> +#include <drm/drm_gem_framebuffer_helper.h> +#include <drm/drm_managed.h> +#include <drm/drm_modes.h> +#include <drm/drm_rect.h> +#include <drm/drm_probe_helper.h> +#include <drm/drm_simple_kms_helper.h> + +#define REPAPER_RID_G2_COG_ID 0x12 + +enum repaper_model { + /* 0 is reserved to avoid clashing with NULL */ + E1144CS021 = 1, + E1190CS021, + E2200CS021, + E2271CS021, +}; + +enum repaper_stage { /* Image pixel -> Display pixel */ + REPAPER_COMPENSATE, /* B -> W, W -> B (Current Image) */ + REPAPER_WHITE, /* B -> N, W -> W (Current Image) */ + REPAPER_INVERSE, /* B -> N, W -> B (New Image) */ + REPAPER_NORMAL /* B -> B, W -> W (New Image) */ +}; + +enum repaper_epd_border_byte { + REPAPER_BORDER_BYTE_NONE, + REPAPER_BORDER_BYTE_ZERO, + REPAPER_BORDER_BYTE_SET, +}; + +struct repaper_epd { + struct drm_device drm; + struct drm_simple_display_pipe pipe; + const struct drm_display_mode *mode; + struct drm_connector connector; + struct spi_device *spi; + + struct gpio_desc *panel_on; + struct gpio_desc *border; + struct gpio_desc *discharge; + struct gpio_desc *reset; + struct gpio_desc *busy; + + struct thermal_zone_device *thermal; + + unsigned int height; + unsigned int width; + unsigned int bytes_per_scan; + const u8 *channel_select; + unsigned int stage_time; + unsigned int factored_stage_time; + bool middle_scan; + bool pre_border_byte; + enum repaper_epd_border_byte border_byte; + + u8 *line_buffer; + void *current_frame; + + bool cleared; + bool partial; +}; + +static inline struct repaper_epd *drm_to_epd(struct drm_device *drm) +{ + return container_of(drm, struct repaper_epd, drm); +} + +static int repaper_spi_transfer(struct spi_device *spi, u8 header, + const void *tx, void *rx, size_t len) +{ + void *txbuf = NULL, *rxbuf = NULL; + struct spi_transfer tr[2] = {}; + u8 *headerbuf; + int ret; + + headerbuf = kmalloc(1, GFP_KERNEL); + if (!headerbuf) + return -ENOMEM; + + headerbuf[0] = header; + tr[0].tx_buf = headerbuf; + tr[0].len = 1; + + /* Stack allocated tx? */ + if (tx && len <= 32) { + txbuf = kmemdup(tx, len, GFP_KERNEL); + if (!txbuf) { + ret = -ENOMEM; + goto out_free; + } + } + + if (rx) { + rxbuf = kmalloc(len, GFP_KERNEL); + if (!rxbuf) { + ret = -ENOMEM; + goto out_free; + } + } + + tr[1].tx_buf = txbuf ? txbuf : tx; + tr[1].rx_buf = rxbuf; + tr[1].len = len; + + ndelay(80); + ret = spi_sync_transfer(spi, tr, 2); + if (rx && !ret) + memcpy(rx, rxbuf, len); + +out_free: + kfree(headerbuf); + kfree(txbuf); + kfree(rxbuf); + + return ret; +} + +static int repaper_write_buf(struct spi_device *spi, u8 reg, + const u8 *buf, size_t len) +{ + int ret; + + ret = repaper_spi_transfer(spi, 0x70, ®, NULL, 1); + if (ret) + return ret; + + return repaper_spi_transfer(spi, 0x72, buf, NULL, len); +} + +static int repaper_write_val(struct spi_device *spi, u8 reg, u8 val) +{ + return repaper_write_buf(spi, reg, &val, 1); +} + +static int repaper_read_val(struct spi_device *spi, u8 reg) +{ + int ret; + u8 val; + + ret = repaper_spi_transfer(spi, 0x70, ®, NULL, 1); + if (ret) + return ret; + + ret = repaper_spi_transfer(spi, 0x73, NULL, &val, 1); + + return ret ? ret : val; +} + +static int repaper_read_id(struct spi_device *spi) +{ + int ret; + u8 id; + + ret = repaper_spi_transfer(spi, 0x71, NULL, &id, 1); + + return ret ? ret : id; +} + +static void repaper_spi_mosi_low(struct spi_device *spi) +{ + const u8 buf[1] = { 0 }; + + spi_write(spi, buf, 1); +} + +/* pixels on display are numbered from 1 so even is actually bits 1,3,5,... */ +static void repaper_even_pixels(struct repaper_epd *epd, u8 **pp, + const u8 *data, u8 fixed_value, const u8 *mask, + enum repaper_stage stage) +{ + unsigned int b; + + for (b = 0; b < (epd->width / 8); b++) { + if (data) { + u8 pixels = data[b] & 0xaa; + u8 pixel_mask = 0xff; + u8 p1, p2, p3, p4; + + if (mask) { + pixel_mask = (mask[b] ^ pixels) & 0xaa; + pixel_mask |= pixel_mask >> 1; + } + + switch (stage) { + case REPAPER_COMPENSATE: /* B -> W, W -> B (Current) */ + pixels = 0xaa | ((pixels ^ 0xaa) >> 1); + break; + case REPAPER_WHITE: /* B -> N, W -> W (Current) */ + pixels = 0x55 + ((pixels ^ 0xaa) >> 1); + break; + case REPAPER_INVERSE: /* B -> N, W -> B (New) */ + pixels = 0x55 | (pixels ^ 0xaa); + break; + case REPAPER_NORMAL: /* B -> B, W -> W (New) */ + pixels = 0xaa | (pixels >> 1); + break; + } + + pixels = (pixels & pixel_mask) | (~pixel_mask & 0x55); + p1 = (pixels >> 6) & 0x03; + p2 = (pixels >> 4) & 0x03; + p3 = (pixels >> 2) & 0x03; + p4 = (pixels >> 0) & 0x03; + pixels = (p1 << 0) | (p2 << 2) | (p3 << 4) | (p4 << 6); + *(*pp)++ = pixels; + } else { + *(*pp)++ = fixed_value; + } + } +} + +/* pixels on display are numbered from 1 so odd is actually bits 0,2,4,... */ +static void repaper_odd_pixels(struct repaper_epd *epd, u8 **pp, + const u8 *data, u8 fixed_value, const u8 *mask, + enum repaper_stage stage) +{ + unsigned int b; + + for (b = epd->width / 8; b > 0; b--) { + if (data) { + u8 pixels = data[b - 1] & 0x55; + u8 pixel_mask = 0xff; + + if (mask) { + pixel_mask = (mask[b - 1] ^ pixels) & 0x55; + pixel_mask |= pixel_mask << 1; + } + + switch (stage) { + case REPAPER_COMPENSATE: /* B -> W, W -> B (Current) */ + pixels = 0xaa | (pixels ^ 0x55); + break; + case REPAPER_WHITE: /* B -> N, W -> W (Current) */ + pixels = 0x55 + (pixels ^ 0x55); + break; + case REPAPER_INVERSE: /* B -> N, W -> B (New) */ + pixels = 0x55 | ((pixels ^ 0x55) << 1); + break; + case REPAPER_NORMAL: /* B -> B, W -> W (New) */ + pixels = 0xaa | pixels; + break; + } + + pixels = (pixels & pixel_mask) | (~pixel_mask & 0x55); + *(*pp)++ = pixels; + } else { + *(*pp)++ = fixed_value; + } + } +} + +/* interleave bits: (byte)76543210 -> (16 bit).7.6.5.4.3.2.1 */ +static inline u16 repaper_interleave_bits(u16 value) +{ + value = (value | (value << 4)) & 0x0f0f; + value = (value | (value << 2)) & 0x3333; + value = (value | (value << 1)) & 0x5555; + + return value; +} + +/* pixels on display are numbered from 1 */ +static void repaper_all_pixels(struct repaper_epd *epd, u8 **pp, + const u8 *data, u8 fixed_value, const u8 *mask, + enum repaper_stage stage) +{ + unsigned int b; + + for (b = epd->width / 8; b > 0; b--) { + if (data) { + u16 pixels = repaper_interleave_bits(data[b - 1]); + u16 pixel_mask = 0xffff; + + if (mask) { + pixel_mask = repaper_interleave_bits(mask[b - 1]); + + pixel_mask = (pixel_mask ^ pixels) & 0x5555; + pixel_mask |= pixel_mask << 1; + } + + switch (stage) { + case REPAPER_COMPENSATE: /* B -> W, W -> B (Current) */ + pixels = 0xaaaa | (pixels ^ 0x5555); + break; + case REPAPER_WHITE: /* B -> N, W -> W (Current) */ + pixels = 0x5555 + (pixels ^ 0x5555); + break; + case REPAPER_INVERSE: /* B -> N, W -> B (New) */ + pixels = 0x5555 | ((pixels ^ 0x5555) << 1); + break; + case REPAPER_NORMAL: /* B -> B, W -> W (New) */ + pixels = 0xaaaa | pixels; + break; + } + + pixels = (pixels & pixel_mask) | (~pixel_mask & 0x5555); + *(*pp)++ = pixels >> 8; + *(*pp)++ = pixels; + } else { + *(*pp)++ = fixed_value; + *(*pp)++ = fixed_value; + } + } +} + +/* output one line of scan and data bytes to the display */ +static void repaper_one_line(struct repaper_epd *epd, unsigned int line, + const u8 *data, u8 fixed_value, const u8 *mask, + enum repaper_stage stage) +{ + u8 *p = epd->line_buffer; + unsigned int b; + + repaper_spi_mosi_low(epd->spi); + + if (epd->pre_border_byte) + *p++ = 0x00; + + if (epd->middle_scan) { + /* data bytes */ + repaper_odd_pixels(epd, &p, data, fixed_value, mask, stage); + + /* scan line */ + for (b = epd->bytes_per_scan; b > 0; b--) { + if (line / 4 == b - 1) + *p++ = 0x03 << (2 * (line & 0x03)); + else + *p++ = 0x00; + } + + /* data bytes */ + repaper_even_pixels(epd, &p, data, fixed_value, mask, stage); + } else { + /* + * even scan line, but as lines on display are numbered from 1, + * line: 1,3,5,... + */ + for (b = 0; b < epd->bytes_per_scan; b++) { + if (0 != (line & 0x01) && line / 8 == b) + *p++ = 0xc0 >> (line & 0x06); + else + *p++ = 0x00; + } + + /* data bytes */ + repaper_all_pixels(epd, &p, data, fixed_value, mask, stage); + + /* + * odd scan line, but as lines on display are numbered from 1, + * line: 0,2,4,6,... + */ + for (b = epd->bytes_per_scan; b > 0; b--) { + if (0 == (line & 0x01) && line / 8 == b - 1) + *p++ = 0x03 << (line & 0x06); + else + *p++ = 0x00; + } + } + + switch (epd->border_byte) { + case REPAPER_BORDER_BYTE_NONE: + break; + + case REPAPER_BORDER_BYTE_ZERO: + *p++ = 0x00; + break; + + case REPAPER_BORDER_BYTE_SET: + switch (stage) { + case REPAPER_COMPENSATE: + case REPAPER_WHITE: + case REPAPER_INVERSE: + *p++ = 0x00; + break; + case REPAPER_NORMAL: + *p++ = 0xaa; + break; + } + break; + } + + repaper_write_buf(epd->spi, 0x0a, epd->line_buffer, + p - epd->line_buffer); + + /* Output data to panel */ + repaper_write_val(epd->spi, 0x02, 0x07); + + repaper_spi_mosi_low(epd->spi); +} + +static void repaper_frame_fixed(struct repaper_epd *epd, u8 fixed_value, + enum repaper_stage stage) +{ + unsigned int line; + + for (line = 0; line < epd->height; line++) + repaper_one_line(epd, line, NULL, fixed_value, NULL, stage); +} + +static void repaper_frame_data(struct repaper_epd *epd, const u8 *image, + const u8 *mask, enum repaper_stage stage) +{ + unsigned int line; + + if (!mask) { + for (line = 0; line < epd->height; line++) { + repaper_one_line(epd, line, + &image[line * (epd->width / 8)], + 0, NULL, stage); + } + } else { + for (line = 0; line < epd->height; line++) { + size_t n = line * epd->width / 8; + + repaper_one_line(epd, line, &image[n], 0, &mask[n], + stage); + } + } +} + +static void repaper_frame_fixed_repeat(struct repaper_epd *epd, u8 fixed_value, + enum repaper_stage stage) +{ + u64 start = local_clock(); + u64 end = start + (epd->factored_stage_time * 1000 * 1000); + + do { + repaper_frame_fixed(epd, fixed_value, stage); + } while (local_clock() < end); +} + +static void repaper_frame_data_repeat(struct repaper_epd *epd, const u8 *image, + const u8 *mask, enum repaper_stage stage) +{ + u64 start = local_clock(); + u64 end = start + (epd->factored_stage_time * 1000 * 1000); + + do { + repaper_frame_data(epd, image, mask, stage); + } while (local_clock() < end); +} + +static void repaper_get_temperature(struct repaper_epd *epd) +{ + int ret, temperature = 0; + unsigned int factor10x; + + if (!epd->thermal) + return; + + ret = thermal_zone_get_temp(epd->thermal, &temperature); + if (ret) { + DRM_DEV_ERROR(&epd->spi->dev, "Failed to get temperature (%d)\n", ret); + return; + } + + temperature /= 1000; + + if (temperature <= -10) + factor10x = 170; + else if (temperature <= -5) + factor10x = 120; + else if (temperature <= 5) + factor10x = 80; + else if (temperature <= 10) + factor10x = 40; + else if (temperature <= 15) + factor10x = 30; + else if (temperature <= 20) + factor10x = 20; + else if (temperature <= 40) + factor10x = 10; + else + factor10x = 7; + + epd->factored_stage_time = epd->stage_time * factor10x / 10; +} + +static int repaper_fb_dirty(struct drm_framebuffer *fb) +{ + struct drm_gem_dma_object *dma_obj = drm_fb_dma_get_gem_obj(fb, 0); + struct repaper_epd *epd = drm_to_epd(fb->dev); + unsigned int dst_pitch = 0; + struct iosys_map dst, vmap; + struct drm_rect clip; + int idx, ret = 0; + u8 *buf = NULL; + + if (!drm_dev_enter(fb->dev, &idx)) + return -ENODEV; + + /* repaper can't do partial updates */ + clip.x1 = 0; + clip.x2 = fb->width; + clip.y1 = 0; + clip.y2 = fb->height; + + repaper_get_temperature(epd); + + DRM_DEBUG("Flushing [FB:%d] st=%ums\n", fb->base.id, + epd->factored_stage_time); + + buf = kmalloc(fb->width * fb->height / 8, GFP_KERNEL); + if (!buf) { + ret = -ENOMEM; + goto out_exit; + } + + ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE); + if (ret) + goto out_free; + + iosys_map_set_vaddr(&dst, buf); + iosys_map_set_vaddr(&vmap, dma_obj->vaddr); + drm_fb_xrgb8888_to_mono(&dst, &dst_pitch, &vmap, fb, &clip); + + drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE); + + if (epd->partial) { + repaper_frame_data_repeat(epd, buf, epd->current_frame, + REPAPER_NORMAL); + } else if (epd->cleared) { + repaper_frame_data_repeat(epd, epd->current_frame, NULL, + REPAPER_COMPENSATE); + repaper_frame_data_repeat(epd, epd->current_frame, NULL, + REPAPER_WHITE); + repaper_frame_data_repeat(epd, buf, NULL, REPAPER_INVERSE); + repaper_frame_data_repeat(epd, buf, NULL, REPAPER_NORMAL); + + epd->partial = true; + } else { + /* Clear display (anything -> white) */ + repaper_frame_fixed_repeat(epd, 0xff, REPAPER_COMPENSATE); + repaper_frame_fixed_repeat(epd, 0xff, REPAPER_WHITE); + repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_INVERSE); + repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_NORMAL); + + /* Assuming a clear (white) screen output an image */ + repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_COMPENSATE); + repaper_frame_fixed_repeat(epd, 0xaa, REPAPER_WHITE); + repaper_frame_data_repeat(epd, buf, NULL, REPAPER_INVERSE); + repaper_frame_data_repeat(epd, buf, NULL, REPAPER_NORMAL); + + epd->cleared = true; + epd->partial = true; + } + + memcpy(epd->current_frame, buf, fb->width * fb->height / 8); + + /* + * An extra frame write is needed if pixels are set in the bottom line, + * or else grey lines rises up from the pixels + */ + if (epd->pre_border_byte) { + unsigned int x; + + for (x = 0; x < (fb->width / 8); x++) + if (buf[x + (fb->width * (fb->height - 1) / 8)]) { + repaper_frame_data_repeat(epd, buf, + epd->current_frame, + REPAPER_NORMAL); + break; + } + } + +out_free: + kfree(buf); +out_exit: + drm_dev_exit(idx); + + return ret; +} + +static void power_off(struct repaper_epd *epd) +{ + /* Turn off power and all signals */ + gpiod_set_value_cansleep(epd->reset, 0); + gpiod_set_value_cansleep(epd->panel_on, 0); + if (epd->border) + gpiod_set_value_cansleep(epd->border, 0); + + /* Ensure SPI MOSI and CLOCK are Low before CS Low */ + repaper_spi_mosi_low(epd->spi); + + /* Discharge pulse */ + gpiod_set_value_cansleep(epd->discharge, 1); + msleep(150); + gpiod_set_value_cansleep(epd->discharge, 0); +} + +static enum drm_mode_status repaper_pipe_mode_valid(struct drm_simple_display_pipe *pipe, + const struct drm_display_mode *mode) +{ + struct drm_crtc *crtc = &pipe->crtc; + struct repaper_epd *epd = drm_to_epd(crtc->dev); + + return drm_crtc_helper_mode_valid_fixed(crtc, mode, epd->mode); +} + +static void repaper_pipe_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state, + struct drm_plane_state *plane_state) +{ + struct repaper_epd *epd = drm_to_epd(pipe->crtc.dev); + struct spi_device *spi = epd->spi; + struct device *dev = &spi->dev; + bool dc_ok = false; + int i, ret, idx; + + if (!drm_dev_enter(pipe->crtc.dev, &idx)) + return; + + DRM_DEBUG_DRIVER("\n"); + + /* Power up sequence */ + gpiod_set_value_cansleep(epd->reset, 0); + gpiod_set_value_cansleep(epd->panel_on, 0); + gpiod_set_value_cansleep(epd->discharge, 0); + if (epd->border) + gpiod_set_value_cansleep(epd->border, 0); + repaper_spi_mosi_low(spi); + usleep_range(5000, 10000); + + gpiod_set_value_cansleep(epd->panel_on, 1); + /* + * This delay comes from the repaper.org userspace driver, it's not + * mentioned in the datasheet. + */ + usleep_range(10000, 15000); + gpiod_set_value_cansleep(epd->reset, 1); + if (epd->border) + gpiod_set_value_cansleep(epd->border, 1); + usleep_range(5000, 10000); + gpiod_set_value_cansleep(epd->reset, 0); + usleep_range(5000, 10000); + gpiod_set_value_cansleep(epd->reset, 1); + usleep_range(5000, 10000); + + /* Wait for COG to become ready */ + for (i = 100; i > 0; i--) { + if (!gpiod_get_value_cansleep(epd->busy)) + break; + + usleep_range(10, 100); + } + + if (!i) { + DRM_DEV_ERROR(dev, "timeout waiting for panel to become ready.\n"); + power_off(epd); + goto out_exit; + } + + repaper_read_id(spi); + ret = repaper_read_id(spi); + if (ret != REPAPER_RID_G2_COG_ID) { + if (ret < 0) + dev_err(dev, "failed to read chip (%d)\n", ret); + else + dev_err(dev, "wrong COG ID 0x%02x\n", ret); + power_off(epd); + goto out_exit; + } + + /* Disable OE */ + repaper_write_val(spi, 0x02, 0x40); + + ret = repaper_read_val(spi, 0x0f); + if (ret < 0 || !(ret & 0x80)) { + if (ret < 0) + DRM_DEV_ERROR(dev, "failed to read chip (%d)\n", ret); + else + DRM_DEV_ERROR(dev, "panel is reported broken\n"); + power_off(epd); + goto out_exit; + } + + /* Power saving mode */ + repaper_write_val(spi, 0x0b, 0x02); + /* Channel select */ + repaper_write_buf(spi, 0x01, epd->channel_select, 8); + /* High power mode osc */ + repaper_write_val(spi, 0x07, 0xd1); + /* Power setting */ + repaper_write_val(spi, 0x08, 0x02); + /* Vcom level */ + repaper_write_val(spi, 0x09, 0xc2); + /* Power setting */ + repaper_write_val(spi, 0x04, 0x03); + /* Driver latch on */ + repaper_write_val(spi, 0x03, 0x01); + /* Driver latch off */ + repaper_write_val(spi, 0x03, 0x00); + usleep_range(5000, 10000); + + /* Start chargepump */ + for (i = 0; i < 4; ++i) { + /* Charge pump positive voltage on - VGH/VDL on */ + repaper_write_val(spi, 0x05, 0x01); + msleep(240); + + /* Charge pump negative voltage on - VGL/VDL on */ + repaper_write_val(spi, 0x05, 0x03); + msleep(40); + + /* Charge pump Vcom on - Vcom driver on */ + repaper_write_val(spi, 0x05, 0x0f); + msleep(40); + + /* check DC/DC */ + ret = repaper_read_val(spi, 0x0f); + if (ret < 0) { + DRM_DEV_ERROR(dev, "failed to read chip (%d)\n", ret); + power_off(epd); + goto out_exit; + } + + if (ret & 0x40) { + dc_ok = true; + break; + } + } + + if (!dc_ok) { + DRM_DEV_ERROR(dev, "dc/dc failed\n"); + power_off(epd); + goto out_exit; + } + + /* + * Output enable to disable + * The userspace driver sets this to 0x04, but the datasheet says 0x06 + */ + repaper_write_val(spi, 0x02, 0x04); + + epd->partial = false; +out_exit: + drm_dev_exit(idx); +} + +static void repaper_pipe_disable(struct drm_simple_display_pipe *pipe) +{ + struct repaper_epd *epd = drm_to_epd(pipe->crtc.dev); + struct spi_device *spi = epd->spi; + unsigned int line; + + /* + * This callback is not protected by drm_dev_enter/exit since we want to + * turn off the display on regular driver unload. It's highly unlikely + * that the underlying SPI controller is gone should this be called after + * unplug. + */ + + DRM_DEBUG_DRIVER("\n"); + + /* Nothing frame */ + for (line = 0; line < epd->height; line++) + repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL, + REPAPER_COMPENSATE); + + /* 2.7" */ + if (epd->border) { + /* Dummy line */ + repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL, + REPAPER_COMPENSATE); + msleep(25); + gpiod_set_value_cansleep(epd->border, 0); + msleep(200); + gpiod_set_value_cansleep(epd->border, 1); + } else { + /* Border dummy line */ + repaper_one_line(epd, 0x7fffu, NULL, 0x00, NULL, + REPAPER_NORMAL); + msleep(200); + } + + /* not described in datasheet */ + repaper_write_val(spi, 0x0b, 0x00); + /* Latch reset turn on */ + repaper_write_val(spi, 0x03, 0x01); + /* Power off charge pump Vcom */ + repaper_write_val(spi, 0x05, 0x03); + /* Power off charge pump neg voltage */ + repaper_write_val(spi, 0x05, 0x01); + msleep(120); + /* Discharge internal */ + repaper_write_val(spi, 0x04, 0x80); + /* turn off all charge pumps */ + repaper_write_val(spi, 0x05, 0x00); + /* Turn off osc */ + repaper_write_val(spi, 0x07, 0x01); + msleep(50); + + power_off(epd); +} + +static void repaper_pipe_update(struct drm_simple_display_pipe *pipe, + struct drm_plane_state *old_state) +{ + struct drm_plane_state *state = pipe->plane.state; + struct drm_rect rect; + + if (!pipe->crtc.state->active) + return; + + if (drm_atomic_helper_damage_merged(old_state, state, &rect)) + repaper_fb_dirty(state->fb); +} + +static const struct drm_simple_display_pipe_funcs repaper_pipe_funcs = { + .mode_valid = repaper_pipe_mode_valid, + .enable = repaper_pipe_enable, + .disable = repaper_pipe_disable, + .update = repaper_pipe_update, +}; + +static int repaper_connector_get_modes(struct drm_connector *connector) +{ + struct repaper_epd *epd = drm_to_epd(connector->dev); + + return drm_connector_helper_get_modes_fixed(connector, epd->mode); +} + +static const struct drm_connector_helper_funcs repaper_connector_hfuncs = { + .get_modes = repaper_connector_get_modes, +}; + +static const struct drm_connector_funcs repaper_connector_funcs = { + .reset = drm_atomic_helper_connector_reset, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = drm_connector_cleanup, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static const struct drm_mode_config_funcs repaper_mode_config_funcs = { + .fb_create = drm_gem_fb_create_with_dirty, + .atomic_check = drm_atomic_helper_check, + .atomic_commit = drm_atomic_helper_commit, +}; + +static const uint32_t repaper_formats[] = { + DRM_FORMAT_XRGB8888, +}; + +static const struct drm_display_mode repaper_e1144cs021_mode = { + DRM_SIMPLE_MODE(128, 96, 29, 22), +}; + +static const u8 repaper_e1144cs021_cs[] = { 0x00, 0x00, 0x00, 0x00, + 0x00, 0x0f, 0xff, 0x00 }; + +static const struct drm_display_mode repaper_e1190cs021_mode = { + DRM_SIMPLE_MODE(144, 128, 36, 32), +}; + +static const u8 repaper_e1190cs021_cs[] = { 0x00, 0x00, 0x00, 0x03, + 0xfc, 0x00, 0x00, 0xff }; + +static const struct drm_display_mode repaper_e2200cs021_mode = { + DRM_SIMPLE_MODE(200, 96, 46, 22), +}; + +static const u8 repaper_e2200cs021_cs[] = { 0x00, 0x00, 0x00, 0x00, + 0x01, 0xff, 0xe0, 0x00 }; + +static const struct drm_display_mode repaper_e2271cs021_mode = { + DRM_SIMPLE_MODE(264, 176, 57, 38), +}; + +static const u8 repaper_e2271cs021_cs[] = { 0x00, 0x00, 0x00, 0x7f, + 0xff, 0xfe, 0x00, 0x00 }; + +DEFINE_DRM_GEM_DMA_FOPS(repaper_fops); + +static const struct drm_driver repaper_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, + .fops = &repaper_fops, + DRM_GEM_DMA_DRIVER_OPS_VMAP, + .name = "repaper", + .desc = "Pervasive Displays RePaper e-ink panels", + .date = "20170405", + .major = 1, + .minor = 0, +}; + +static const struct of_device_id repaper_of_match[] = { + { .compatible = "pervasive,e1144cs021", .data = (void *)E1144CS021 }, + { .compatible = "pervasive,e1190cs021", .data = (void *)E1190CS021 }, + { .compatible = "pervasive,e2200cs021", .data = (void *)E2200CS021 }, + { .compatible = "pervasive,e2271cs021", .data = (void *)E2271CS021 }, + {}, +}; +MODULE_DEVICE_TABLE(of, repaper_of_match); + +static const struct spi_device_id repaper_id[] = { + { "e1144cs021", E1144CS021 }, + { "e1190cs021", E1190CS021 }, + { "e2200cs021", E2200CS021 }, + { "e2271cs021", E2271CS021 }, + { }, +}; +MODULE_DEVICE_TABLE(spi, repaper_id); + +static int repaper_probe(struct spi_device *spi) +{ + const struct drm_display_mode *mode; + const struct spi_device_id *spi_id; + struct device *dev = &spi->dev; + enum repaper_model model; + const char *thermal_zone; + struct repaper_epd *epd; + size_t line_buffer_size; + struct drm_device *drm; + const void *match; + int ret; + + match = device_get_match_data(dev); + if (match) { + model = (enum repaper_model)match; + } else { + spi_id = spi_get_device_id(spi); + model = (enum repaper_model)spi_id->driver_data; + } + + /* The SPI device is used to allocate dma memory */ + if (!dev->coherent_dma_mask) { + ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32)); + if (ret) { + dev_warn(dev, "Failed to set dma mask %d\n", ret); + return ret; + } + } + + epd = devm_drm_dev_alloc(dev, &repaper_driver, + struct repaper_epd, drm); + if (IS_ERR(epd)) + return PTR_ERR(epd); + + drm = &epd->drm; + + ret = drmm_mode_config_init(drm); + if (ret) + return ret; + drm->mode_config.funcs = &repaper_mode_config_funcs; + + epd->spi = spi; + + epd->panel_on = devm_gpiod_get(dev, "panel-on", GPIOD_OUT_LOW); + if (IS_ERR(epd->panel_on)) { + ret = PTR_ERR(epd->panel_on); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, "Failed to get gpio 'panel-on'\n"); + return ret; + } + + epd->discharge = devm_gpiod_get(dev, "discharge", GPIOD_OUT_LOW); + if (IS_ERR(epd->discharge)) { + ret = PTR_ERR(epd->discharge); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, "Failed to get gpio 'discharge'\n"); + return ret; + } + + epd->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(epd->reset)) { + ret = PTR_ERR(epd->reset); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n"); + return ret; + } + + epd->busy = devm_gpiod_get(dev, "busy", GPIOD_IN); + if (IS_ERR(epd->busy)) { + ret = PTR_ERR(epd->busy); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, "Failed to get gpio 'busy'\n"); + return ret; + } + + if (!device_property_read_string(dev, "pervasive,thermal-zone", + &thermal_zone)) { + epd->thermal = thermal_zone_get_zone_by_name(thermal_zone); + if (IS_ERR(epd->thermal)) { + DRM_DEV_ERROR(dev, "Failed to get thermal zone: %s\n", thermal_zone); + return PTR_ERR(epd->thermal); + } + } + + switch (model) { + case E1144CS021: + mode = &repaper_e1144cs021_mode; + epd->channel_select = repaper_e1144cs021_cs; + epd->stage_time = 480; + epd->bytes_per_scan = 96 / 4; + epd->middle_scan = true; /* data-scan-data */ + epd->pre_border_byte = false; + epd->border_byte = REPAPER_BORDER_BYTE_ZERO; + break; + + case E1190CS021: + mode = &repaper_e1190cs021_mode; + epd->channel_select = repaper_e1190cs021_cs; + epd->stage_time = 480; + epd->bytes_per_scan = 128 / 4 / 2; + epd->middle_scan = false; /* scan-data-scan */ + epd->pre_border_byte = false; + epd->border_byte = REPAPER_BORDER_BYTE_SET; + break; + + case E2200CS021: + mode = &repaper_e2200cs021_mode; + epd->channel_select = repaper_e2200cs021_cs; + epd->stage_time = 480; + epd->bytes_per_scan = 96 / 4; + epd->middle_scan = true; /* data-scan-data */ + epd->pre_border_byte = true; + epd->border_byte = REPAPER_BORDER_BYTE_NONE; + break; + + case E2271CS021: + epd->border = devm_gpiod_get(dev, "border", GPIOD_OUT_LOW); + if (IS_ERR(epd->border)) { + ret = PTR_ERR(epd->border); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, "Failed to get gpio 'border'\n"); + return ret; + } + + mode = &repaper_e2271cs021_mode; + epd->channel_select = repaper_e2271cs021_cs; + epd->stage_time = 630; + epd->bytes_per_scan = 176 / 4; + epd->middle_scan = true; /* data-scan-data */ + epd->pre_border_byte = true; + epd->border_byte = REPAPER_BORDER_BYTE_NONE; + break; + + default: + return -ENODEV; + } + + epd->mode = mode; + epd->width = mode->hdisplay; + epd->height = mode->vdisplay; + epd->factored_stage_time = epd->stage_time; + + line_buffer_size = 2 * epd->width / 8 + epd->bytes_per_scan + 2; + epd->line_buffer = devm_kzalloc(dev, line_buffer_size, GFP_KERNEL); + if (!epd->line_buffer) + return -ENOMEM; + + epd->current_frame = devm_kzalloc(dev, epd->width * epd->height / 8, + GFP_KERNEL); + if (!epd->current_frame) + return -ENOMEM; + + drm->mode_config.min_width = mode->hdisplay; + drm->mode_config.max_width = mode->hdisplay; + drm->mode_config.min_height = mode->vdisplay; + drm->mode_config.max_height = mode->vdisplay; + + drm_connector_helper_add(&epd->connector, &repaper_connector_hfuncs); + ret = drm_connector_init(drm, &epd->connector, &repaper_connector_funcs, + DRM_MODE_CONNECTOR_SPI); + if (ret) + return ret; + + ret = drm_simple_display_pipe_init(drm, &epd->pipe, &repaper_pipe_funcs, + repaper_formats, ARRAY_SIZE(repaper_formats), + NULL, &epd->connector); + if (ret) + return ret; + + drm_mode_config_reset(drm); + + ret = drm_dev_register(drm, 0); + if (ret) + return ret; + + spi_set_drvdata(spi, drm); + + DRM_DEBUG_DRIVER("SPI speed: %uMHz\n", spi->max_speed_hz / 1000000); + + drm_fbdev_generic_setup(drm, 0); + + return 0; +} + +static void repaper_remove(struct spi_device *spi) +{ + struct drm_device *drm = spi_get_drvdata(spi); + + drm_dev_unplug(drm); + drm_atomic_helper_shutdown(drm); +} + +static void repaper_shutdown(struct spi_device *spi) +{ + drm_atomic_helper_shutdown(spi_get_drvdata(spi)); +} + +static struct spi_driver repaper_spi_driver = { + .driver = { + .name = "repaper", + .of_match_table = repaper_of_match, + }, + .id_table = repaper_id, + .probe = repaper_probe, + .remove = repaper_remove, + .shutdown = repaper_shutdown, +}; +module_spi_driver(repaper_spi_driver); + +MODULE_DESCRIPTION("Pervasive Displays RePaper DRM driver"); +MODULE_AUTHOR("Noralf Trønnes"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c new file mode 100644 index 000000000..18489779f --- /dev/null +++ b/drivers/gpu/drm/tiny/simpledrm.c @@ -0,0 +1,882 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include <linux/clk.h> +#include <linux/of_clk.h> +#include <linux/minmax.h> +#include <linux/platform_data/simplefb.h> +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> + +#include <drm/drm_aperture.h> +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_state_helper.h> +#include <drm/drm_connector.h> +#include <drm/drm_damage_helper.h> +#include <drm/drm_device.h> +#include <drm/drm_drv.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_format_helper.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_gem_framebuffer_helper.h> +#include <drm/drm_gem_shmem_helper.h> +#include <drm/drm_managed.h> +#include <drm/drm_modeset_helper_vtables.h> +#include <drm/drm_plane_helper.h> +#include <drm/drm_probe_helper.h> + +#define DRIVER_NAME "simpledrm" +#define DRIVER_DESC "DRM driver for simple-framebuffer platform devices" +#define DRIVER_DATE "20200625" +#define DRIVER_MAJOR 1 +#define DRIVER_MINOR 0 + +/* + * Helpers for simplefb + */ + +static int +simplefb_get_validated_int(struct drm_device *dev, const char *name, + uint32_t value) +{ + if (value > INT_MAX) { + drm_err(dev, "simplefb: invalid framebuffer %s of %u\n", + name, value); + return -EINVAL; + } + return (int)value; +} + +static int +simplefb_get_validated_int0(struct drm_device *dev, const char *name, + uint32_t value) +{ + if (!value) { + drm_err(dev, "simplefb: invalid framebuffer %s of %u\n", + name, value); + return -EINVAL; + } + return simplefb_get_validated_int(dev, name, value); +} + +static const struct drm_format_info * +simplefb_get_validated_format(struct drm_device *dev, const char *format_name) +{ + static const struct simplefb_format formats[] = SIMPLEFB_FORMATS; + const struct simplefb_format *fmt = formats; + const struct simplefb_format *end = fmt + ARRAY_SIZE(formats); + const struct drm_format_info *info; + + if (!format_name) { + drm_err(dev, "simplefb: missing framebuffer format\n"); + return ERR_PTR(-EINVAL); + } + + while (fmt < end) { + if (!strcmp(format_name, fmt->name)) { + info = drm_format_info(fmt->fourcc); + if (!info) + return ERR_PTR(-EINVAL); + return info; + } + ++fmt; + } + + drm_err(dev, "simplefb: unknown framebuffer format %s\n", + format_name); + + return ERR_PTR(-EINVAL); +} + +static int +simplefb_get_width_pd(struct drm_device *dev, + const struct simplefb_platform_data *pd) +{ + return simplefb_get_validated_int0(dev, "width", pd->width); +} + +static int +simplefb_get_height_pd(struct drm_device *dev, + const struct simplefb_platform_data *pd) +{ + return simplefb_get_validated_int0(dev, "height", pd->height); +} + +static int +simplefb_get_stride_pd(struct drm_device *dev, + const struct simplefb_platform_data *pd) +{ + return simplefb_get_validated_int(dev, "stride", pd->stride); +} + +static const struct drm_format_info * +simplefb_get_format_pd(struct drm_device *dev, + const struct simplefb_platform_data *pd) +{ + return simplefb_get_validated_format(dev, pd->format); +} + +static int +simplefb_read_u32_of(struct drm_device *dev, struct device_node *of_node, + const char *name, u32 *value) +{ + int ret = of_property_read_u32(of_node, name, value); + + if (ret) + drm_err(dev, "simplefb: cannot parse framebuffer %s: error %d\n", + name, ret); + return ret; +} + +static int +simplefb_read_string_of(struct drm_device *dev, struct device_node *of_node, + const char *name, const char **value) +{ + int ret = of_property_read_string(of_node, name, value); + + if (ret) + drm_err(dev, "simplefb: cannot parse framebuffer %s: error %d\n", + name, ret); + return ret; +} + +static int +simplefb_get_width_of(struct drm_device *dev, struct device_node *of_node) +{ + u32 width; + int ret = simplefb_read_u32_of(dev, of_node, "width", &width); + + if (ret) + return ret; + return simplefb_get_validated_int0(dev, "width", width); +} + +static int +simplefb_get_height_of(struct drm_device *dev, struct device_node *of_node) +{ + u32 height; + int ret = simplefb_read_u32_of(dev, of_node, "height", &height); + + if (ret) + return ret; + return simplefb_get_validated_int0(dev, "height", height); +} + +static int +simplefb_get_stride_of(struct drm_device *dev, struct device_node *of_node) +{ + u32 stride; + int ret = simplefb_read_u32_of(dev, of_node, "stride", &stride); + + if (ret) + return ret; + return simplefb_get_validated_int(dev, "stride", stride); +} + +static const struct drm_format_info * +simplefb_get_format_of(struct drm_device *dev, struct device_node *of_node) +{ + const char *format; + int ret = simplefb_read_string_of(dev, of_node, "format", &format); + + if (ret) + return ERR_PTR(ret); + return simplefb_get_validated_format(dev, format); +} + +/* + * Simple Framebuffer device + */ + +struct simpledrm_device { + struct drm_device dev; + + /* clocks */ +#if defined CONFIG_OF && defined CONFIG_COMMON_CLK + unsigned int clk_count; + struct clk **clks; +#endif + /* regulators */ +#if defined CONFIG_OF && defined CONFIG_REGULATOR + unsigned int regulator_count; + struct regulator **regulators; +#endif + + /* simplefb settings */ + struct drm_display_mode mode; + const struct drm_format_info *format; + unsigned int pitch; + + /* memory management */ + void __iomem *screen_base; + + /* modesetting */ + uint32_t formats[8]; + size_t nformats; + struct drm_plane primary_plane; + struct drm_crtc crtc; + struct drm_encoder encoder; + struct drm_connector connector; +}; + +static struct simpledrm_device *simpledrm_device_of_dev(struct drm_device *dev) +{ + return container_of(dev, struct simpledrm_device, dev); +} + +/* + * Hardware + */ + +#if defined CONFIG_OF && defined CONFIG_COMMON_CLK +/* + * Clock handling code. + * + * Here we handle the clocks property of our "simple-framebuffer" dt node. + * This is necessary so that we can make sure that any clocks needed by + * the display engine that the bootloader set up for us (and for which it + * provided a simplefb dt node), stay up, for the life of the simplefb + * driver. + * + * When the driver unloads, we cleanly disable, and then release the clocks. + * + * We only complain about errors here, no action is taken as the most likely + * error can only happen due to a mismatch between the bootloader which set + * up simplefb, and the clock definitions in the device tree. Chances are + * that there are no adverse effects, and if there are, a clean teardown of + * the fb probe will not help us much either. So just complain and carry on, + * and hope that the user actually gets a working fb at the end of things. + */ + +static void simpledrm_device_release_clocks(void *res) +{ + struct simpledrm_device *sdev = simpledrm_device_of_dev(res); + unsigned int i; + + for (i = 0; i < sdev->clk_count; ++i) { + if (sdev->clks[i]) { + clk_disable_unprepare(sdev->clks[i]); + clk_put(sdev->clks[i]); + } + } +} + +static int simpledrm_device_init_clocks(struct simpledrm_device *sdev) +{ + struct drm_device *dev = &sdev->dev; + struct platform_device *pdev = to_platform_device(dev->dev); + struct device_node *of_node = pdev->dev.of_node; + struct clk *clock; + unsigned int i; + int ret; + + if (dev_get_platdata(&pdev->dev) || !of_node) + return 0; + + sdev->clk_count = of_clk_get_parent_count(of_node); + if (!sdev->clk_count) + return 0; + + sdev->clks = drmm_kzalloc(dev, sdev->clk_count * sizeof(sdev->clks[0]), + GFP_KERNEL); + if (!sdev->clks) + return -ENOMEM; + + for (i = 0; i < sdev->clk_count; ++i) { + clock = of_clk_get(of_node, i); + if (IS_ERR(clock)) { + ret = PTR_ERR(clock); + if (ret == -EPROBE_DEFER) + goto err; + drm_err(dev, "clock %u not found: %d\n", i, ret); + continue; + } + ret = clk_prepare_enable(clock); + if (ret) { + drm_err(dev, "failed to enable clock %u: %d\n", + i, ret); + clk_put(clock); + continue; + } + sdev->clks[i] = clock; + } + + return devm_add_action_or_reset(&pdev->dev, + simpledrm_device_release_clocks, + sdev); + +err: + while (i) { + --i; + if (sdev->clks[i]) { + clk_disable_unprepare(sdev->clks[i]); + clk_put(sdev->clks[i]); + } + } + return ret; +} +#else +static int simpledrm_device_init_clocks(struct simpledrm_device *sdev) +{ + return 0; +} +#endif + +#if defined CONFIG_OF && defined CONFIG_REGULATOR + +#define SUPPLY_SUFFIX "-supply" + +/* + * Regulator handling code. + * + * Here we handle the num-supplies and vin*-supply properties of our + * "simple-framebuffer" dt node. This is necessary so that we can make sure + * that any regulators needed by the display hardware that the bootloader + * set up for us (and for which it provided a simplefb dt node), stay up, + * for the life of the simplefb driver. + * + * When the driver unloads, we cleanly disable, and then release the + * regulators. + * + * We only complain about errors here, no action is taken as the most likely + * error can only happen due to a mismatch between the bootloader which set + * up simplefb, and the regulator definitions in the device tree. Chances are + * that there are no adverse effects, and if there are, a clean teardown of + * the fb probe will not help us much either. So just complain and carry on, + * and hope that the user actually gets a working fb at the end of things. + */ + +static void simpledrm_device_release_regulators(void *res) +{ + struct simpledrm_device *sdev = simpledrm_device_of_dev(res); + unsigned int i; + + for (i = 0; i < sdev->regulator_count; ++i) { + if (sdev->regulators[i]) { + regulator_disable(sdev->regulators[i]); + regulator_put(sdev->regulators[i]); + } + } +} + +static int simpledrm_device_init_regulators(struct simpledrm_device *sdev) +{ + struct drm_device *dev = &sdev->dev; + struct platform_device *pdev = to_platform_device(dev->dev); + struct device_node *of_node = pdev->dev.of_node; + struct property *prop; + struct regulator *regulator; + const char *p; + unsigned int count = 0, i = 0; + int ret; + + if (dev_get_platdata(&pdev->dev) || !of_node) + return 0; + + /* Count the number of regulator supplies */ + for_each_property_of_node(of_node, prop) { + p = strstr(prop->name, SUPPLY_SUFFIX); + if (p && p != prop->name) + ++count; + } + + if (!count) + return 0; + + sdev->regulators = drmm_kzalloc(dev, + count * sizeof(sdev->regulators[0]), + GFP_KERNEL); + if (!sdev->regulators) + return -ENOMEM; + + for_each_property_of_node(of_node, prop) { + char name[32]; /* 32 is max size of property name */ + size_t len; + + p = strstr(prop->name, SUPPLY_SUFFIX); + if (!p || p == prop->name) + continue; + len = strlen(prop->name) - strlen(SUPPLY_SUFFIX) + 1; + strscpy(name, prop->name, min(sizeof(name), len)); + + regulator = regulator_get_optional(&pdev->dev, name); + if (IS_ERR(regulator)) { + ret = PTR_ERR(regulator); + if (ret == -EPROBE_DEFER) + goto err; + drm_err(dev, "regulator %s not found: %d\n", + name, ret); + continue; + } + + ret = regulator_enable(regulator); + if (ret) { + drm_err(dev, "failed to enable regulator %u: %d\n", + i, ret); + regulator_put(regulator); + continue; + } + + sdev->regulators[i++] = regulator; + } + sdev->regulator_count = i; + + return devm_add_action_or_reset(&pdev->dev, + simpledrm_device_release_regulators, + sdev); + +err: + while (i) { + --i; + if (sdev->regulators[i]) { + regulator_disable(sdev->regulators[i]); + regulator_put(sdev->regulators[i]); + } + } + return ret; +} +#else +static int simpledrm_device_init_regulators(struct simpledrm_device *sdev) +{ + return 0; +} +#endif + +/* + * Modesetting + */ + +/* + * Support all formats of simplefb and maybe more; in order + * of preference. The display's update function will do any + * conversion necessary. + * + * TODO: Add blit helpers for remaining formats and uncomment + * constants. + */ +static const uint32_t simpledrm_primary_plane_formats[] = { + DRM_FORMAT_XRGB8888, + DRM_FORMAT_ARGB8888, + DRM_FORMAT_RGB565, + //DRM_FORMAT_XRGB1555, + //DRM_FORMAT_ARGB1555, + DRM_FORMAT_RGB888, + DRM_FORMAT_XRGB2101010, + DRM_FORMAT_ARGB2101010, +}; + +static const uint64_t simpledrm_primary_plane_format_modifiers[] = { + DRM_FORMAT_MOD_LINEAR, + DRM_FORMAT_MOD_INVALID +}; + +static void simpledrm_primary_plane_helper_atomic_update(struct drm_plane *plane, + struct drm_atomic_state *state) +{ + struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane); + struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, plane); + struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state); + struct drm_framebuffer *fb = plane_state->fb; + struct drm_device *dev = plane->dev; + struct simpledrm_device *sdev = simpledrm_device_of_dev(dev); + struct drm_atomic_helper_damage_iter iter; + struct drm_rect damage; + int ret, idx; + + ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE); + if (ret) + return; + + if (!drm_dev_enter(dev, &idx)) + goto out_drm_gem_fb_end_cpu_access; + + drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state); + drm_atomic_for_each_plane_damage(&iter, &damage) { + struct iosys_map dst = IOSYS_MAP_INIT_VADDR(sdev->screen_base); + struct drm_rect dst_clip = plane_state->dst; + + if (!drm_rect_intersect(&dst_clip, &damage)) + continue; + + iosys_map_incr(&dst, drm_fb_clip_offset(sdev->pitch, sdev->format, &dst_clip)); + drm_fb_blit(&dst, &sdev->pitch, sdev->format->format, shadow_plane_state->data, fb, + &damage); + } + + drm_dev_exit(idx); +out_drm_gem_fb_end_cpu_access: + drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE); +} + +static void simpledrm_primary_plane_helper_atomic_disable(struct drm_plane *plane, + struct drm_atomic_state *state) +{ + struct drm_device *dev = plane->dev; + struct simpledrm_device *sdev = simpledrm_device_of_dev(dev); + int idx; + + if (!drm_dev_enter(dev, &idx)) + return; + + /* Clear screen to black if disabled */ + memset_io(sdev->screen_base, 0, sdev->pitch * sdev->mode.vdisplay); + + drm_dev_exit(idx); +} + +static const struct drm_plane_helper_funcs simpledrm_primary_plane_helper_funcs = { + DRM_GEM_SHADOW_PLANE_HELPER_FUNCS, + .atomic_check = drm_plane_helper_atomic_check, + .atomic_update = simpledrm_primary_plane_helper_atomic_update, + .atomic_disable = simpledrm_primary_plane_helper_atomic_disable, +}; + +static const struct drm_plane_funcs simpledrm_primary_plane_funcs = { + .update_plane = drm_atomic_helper_update_plane, + .disable_plane = drm_atomic_helper_disable_plane, + .destroy = drm_plane_cleanup, + DRM_GEM_SHADOW_PLANE_FUNCS, +}; + +static enum drm_mode_status simpledrm_crtc_helper_mode_valid(struct drm_crtc *crtc, + const struct drm_display_mode *mode) +{ + struct simpledrm_device *sdev = simpledrm_device_of_dev(crtc->dev); + + return drm_crtc_helper_mode_valid_fixed(crtc, mode, &sdev->mode); +} + +static int simpledrm_crtc_helper_atomic_check(struct drm_crtc *crtc, + struct drm_atomic_state *new_state) +{ + struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc); + int ret; + + ret = drm_atomic_helper_check_crtc_state(new_crtc_state, false); + if (ret) + return ret; + + return drm_atomic_add_affected_planes(new_state, crtc); +} + +/* + * The CRTC is always enabled. Screen updates are performed by + * the primary plane's atomic_update function. Disabling clears + * the screen in the primary plane's atomic_disable function. + */ +static const struct drm_crtc_helper_funcs simpledrm_crtc_helper_funcs = { + .mode_valid = simpledrm_crtc_helper_mode_valid, + .atomic_check = simpledrm_crtc_helper_atomic_check, +}; + +static const struct drm_crtc_funcs simpledrm_crtc_funcs = { + .reset = drm_atomic_helper_crtc_reset, + .destroy = drm_crtc_cleanup, + .set_config = drm_atomic_helper_set_config, + .page_flip = drm_atomic_helper_page_flip, + .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, +}; + +static const struct drm_encoder_funcs simpledrm_encoder_funcs = { + .destroy = drm_encoder_cleanup, +}; + +static int simpledrm_connector_helper_get_modes(struct drm_connector *connector) +{ + struct simpledrm_device *sdev = simpledrm_device_of_dev(connector->dev); + + return drm_connector_helper_get_modes_fixed(connector, &sdev->mode); +} + +static const struct drm_connector_helper_funcs simpledrm_connector_helper_funcs = { + .get_modes = simpledrm_connector_helper_get_modes, +}; + +static const struct drm_connector_funcs simpledrm_connector_funcs = { + .reset = drm_atomic_helper_connector_reset, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = drm_connector_cleanup, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static const struct drm_mode_config_funcs simpledrm_mode_config_funcs = { + .fb_create = drm_gem_fb_create_with_dirty, + .atomic_check = drm_atomic_helper_check, + .atomic_commit = drm_atomic_helper_commit, +}; + +/* + * Init / Cleanup + */ + +static struct drm_display_mode simpledrm_mode(unsigned int width, + unsigned int height) +{ + /* + * Assume a monitor resolution of 96 dpi to + * get a somewhat reasonable screen size. + */ + const struct drm_display_mode mode = { + DRM_MODE_INIT(60, width, height, + DRM_MODE_RES_MM(width, 96ul), + DRM_MODE_RES_MM(height, 96ul)) + }; + + return mode; +} + +static struct simpledrm_device *simpledrm_device_create(struct drm_driver *drv, + struct platform_device *pdev) +{ + const struct simplefb_platform_data *pd = dev_get_platdata(&pdev->dev); + struct device_node *of_node = pdev->dev.of_node; + struct simpledrm_device *sdev; + struct drm_device *dev; + int width, height, stride; + const struct drm_format_info *format; + struct resource *res, *mem; + void __iomem *screen_base; + struct drm_plane *primary_plane; + struct drm_crtc *crtc; + struct drm_encoder *encoder; + struct drm_connector *connector; + unsigned long max_width, max_height; + size_t nformats; + int ret; + + sdev = devm_drm_dev_alloc(&pdev->dev, drv, struct simpledrm_device, dev); + if (IS_ERR(sdev)) + return ERR_CAST(sdev); + dev = &sdev->dev; + platform_set_drvdata(pdev, sdev); + + /* + * Hardware settings + */ + + ret = simpledrm_device_init_clocks(sdev); + if (ret) + return ERR_PTR(ret); + ret = simpledrm_device_init_regulators(sdev); + if (ret) + return ERR_PTR(ret); + + if (pd) { + width = simplefb_get_width_pd(dev, pd); + if (width < 0) + return ERR_PTR(width); + height = simplefb_get_height_pd(dev, pd); + if (height < 0) + return ERR_PTR(height); + stride = simplefb_get_stride_pd(dev, pd); + if (stride < 0) + return ERR_PTR(stride); + format = simplefb_get_format_pd(dev, pd); + if (IS_ERR(format)) + return ERR_CAST(format); + } else if (of_node) { + width = simplefb_get_width_of(dev, of_node); + if (width < 0) + return ERR_PTR(width); + height = simplefb_get_height_of(dev, of_node); + if (height < 0) + return ERR_PTR(height); + stride = simplefb_get_stride_of(dev, of_node); + if (stride < 0) + return ERR_PTR(stride); + format = simplefb_get_format_of(dev, of_node); + if (IS_ERR(format)) + return ERR_CAST(format); + } else { + drm_err(dev, "no simplefb configuration found\n"); + return ERR_PTR(-ENODEV); + } + if (!stride) { + stride = drm_format_info_min_pitch(format, 0, width); + if (drm_WARN_ON(dev, !stride)) + return ERR_PTR(-EINVAL); + } + + sdev->mode = simpledrm_mode(width, height); + sdev->format = format; + sdev->pitch = stride; + + drm_dbg(dev, "display mode={" DRM_MODE_FMT "}\n", DRM_MODE_ARG(&sdev->mode)); + drm_dbg(dev, "framebuffer format=%p4cc, size=%dx%d, stride=%d byte\n", + &format->format, width, height, stride); + + /* + * Memory management + */ + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return ERR_PTR(-EINVAL); + + ret = devm_aperture_acquire_from_firmware(dev, res->start, resource_size(res)); + if (ret) { + drm_err(dev, "could not acquire memory range %pr: error %d\n", res, ret); + return ERR_PTR(ret); + } + + mem = devm_request_mem_region(&pdev->dev, res->start, resource_size(res), drv->name); + if (!mem) { + /* + * We cannot make this fatal. Sometimes this comes from magic + * spaces our resource handlers simply don't know about. Use + * the I/O-memory resource as-is and try to map that instead. + */ + drm_warn(dev, "could not acquire memory region %pr\n", res); + mem = res; + } + + screen_base = devm_ioremap_wc(&pdev->dev, mem->start, resource_size(mem)); + if (!screen_base) + return ERR_PTR(-ENOMEM); + sdev->screen_base = screen_base; + + /* + * Modesetting + */ + + ret = drmm_mode_config_init(dev); + if (ret) + return ERR_PTR(ret); + + max_width = max_t(unsigned long, width, DRM_SHADOW_PLANE_MAX_WIDTH); + max_height = max_t(unsigned long, height, DRM_SHADOW_PLANE_MAX_HEIGHT); + + dev->mode_config.min_width = width; + dev->mode_config.max_width = max_width; + dev->mode_config.min_height = height; + dev->mode_config.max_height = max_height; + dev->mode_config.preferred_depth = format->cpp[0] * 8; + dev->mode_config.funcs = &simpledrm_mode_config_funcs; + + /* Primary plane */ + + nformats = drm_fb_build_fourcc_list(dev, &format->format, 1, + simpledrm_primary_plane_formats, + ARRAY_SIZE(simpledrm_primary_plane_formats), + sdev->formats, ARRAY_SIZE(sdev->formats)); + + primary_plane = &sdev->primary_plane; + ret = drm_universal_plane_init(dev, primary_plane, 0, &simpledrm_primary_plane_funcs, + sdev->formats, nformats, + simpledrm_primary_plane_format_modifiers, + DRM_PLANE_TYPE_PRIMARY, NULL); + if (ret) + return ERR_PTR(ret); + drm_plane_helper_add(primary_plane, &simpledrm_primary_plane_helper_funcs); + drm_plane_enable_fb_damage_clips(primary_plane); + + /* CRTC */ + + crtc = &sdev->crtc; + ret = drm_crtc_init_with_planes(dev, crtc, primary_plane, NULL, + &simpledrm_crtc_funcs, NULL); + if (ret) + return ERR_PTR(ret); + drm_crtc_helper_add(crtc, &simpledrm_crtc_helper_funcs); + + /* Encoder */ + + encoder = &sdev->encoder; + ret = drm_encoder_init(dev, encoder, &simpledrm_encoder_funcs, + DRM_MODE_ENCODER_NONE, NULL); + if (ret) + return ERR_PTR(ret); + encoder->possible_crtcs = drm_crtc_mask(crtc); + + /* Connector */ + + connector = &sdev->connector; + ret = drm_connector_init(dev, connector, &simpledrm_connector_funcs, + DRM_MODE_CONNECTOR_Unknown); + if (ret) + return ERR_PTR(ret); + drm_connector_helper_add(connector, &simpledrm_connector_helper_funcs); + drm_connector_set_panel_orientation_with_quirk(connector, + DRM_MODE_PANEL_ORIENTATION_UNKNOWN, + width, height); + + ret = drm_connector_attach_encoder(connector, encoder); + if (ret) + return ERR_PTR(ret); + + drm_mode_config_reset(dev); + + return sdev; +} + +/* + * DRM driver + */ + +DEFINE_DRM_GEM_FOPS(simpledrm_fops); + +static struct drm_driver simpledrm_driver = { + DRM_GEM_SHMEM_DRIVER_OPS, + .name = DRIVER_NAME, + .desc = DRIVER_DESC, + .date = DRIVER_DATE, + .major = DRIVER_MAJOR, + .minor = DRIVER_MINOR, + .driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET, + .fops = &simpledrm_fops, +}; + +/* + * Platform driver + */ + +static int simpledrm_probe(struct platform_device *pdev) +{ + struct simpledrm_device *sdev; + struct drm_device *dev; + int ret; + + sdev = simpledrm_device_create(&simpledrm_driver, pdev); + if (IS_ERR(sdev)) + return PTR_ERR(sdev); + dev = &sdev->dev; + + ret = drm_dev_register(dev, 0); + if (ret) + return ret; + + drm_fbdev_generic_setup(dev, 0); + + return 0; +} + +static int simpledrm_remove(struct platform_device *pdev) +{ + struct simpledrm_device *sdev = platform_get_drvdata(pdev); + struct drm_device *dev = &sdev->dev; + + drm_dev_unplug(dev); + + return 0; +} + +static const struct of_device_id simpledrm_of_match_table[] = { + { .compatible = "simple-framebuffer", }, + { }, +}; +MODULE_DEVICE_TABLE(of, simpledrm_of_match_table); + +static struct platform_driver simpledrm_platform_driver = { + .driver = { + .name = "simple-framebuffer", /* connect to sysfb */ + .of_match_table = simpledrm_of_match_table, + }, + .probe = simpledrm_probe, + .remove = simpledrm_remove, +}; + +module_platform_driver(simpledrm_platform_driver); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/gpu/drm/tiny/st7586.c b/drivers/gpu/drm/tiny/st7586.c new file mode 100644 index 000000000..b6f620b90 --- /dev/null +++ b/drivers/gpu/drm/tiny/st7586.c @@ -0,0 +1,395 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * DRM driver for Sitronix ST7586 panels + * + * Copyright 2017 David Lechner <david@lechnology.com> + */ + +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/property.h> +#include <linux/spi/spi.h> +#include <video/mipi_display.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_damage_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_fb_dma_helper.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_format_helper.h> +#include <drm/drm_framebuffer.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_gem_dma_helper.h> +#include <drm/drm_gem_framebuffer_helper.h> +#include <drm/drm_managed.h> +#include <drm/drm_mipi_dbi.h> +#include <drm/drm_rect.h> + +/* controller-specific commands */ +#define ST7586_DISP_MODE_GRAY 0x38 +#define ST7586_DISP_MODE_MONO 0x39 +#define ST7586_ENABLE_DDRAM 0x3a +#define ST7586_SET_DISP_DUTY 0xb0 +#define ST7586_SET_PART_DISP 0xb4 +#define ST7586_SET_NLINE_INV 0xb5 +#define ST7586_SET_VOP 0xc0 +#define ST7586_SET_BIAS_SYSTEM 0xc3 +#define ST7586_SET_BOOST_LEVEL 0xc4 +#define ST7586_SET_VOP_OFFSET 0xc7 +#define ST7586_ENABLE_ANALOG 0xd0 +#define ST7586_AUTO_READ_CTRL 0xd7 +#define ST7586_OTP_RW_CTRL 0xe0 +#define ST7586_OTP_CTRL_OUT 0xe1 +#define ST7586_OTP_READ 0xe3 + +#define ST7586_DISP_CTRL_MX BIT(6) +#define ST7586_DISP_CTRL_MY BIT(7) + +/* + * The ST7586 controller has an unusual pixel format where 2bpp grayscale is + * packed 3 pixels per byte with the first two pixels using 3 bits and the 3rd + * pixel using only 2 bits. + * + * | D7 | D6 | D5 || | || 2bpp | + * | (D4) | (D3) | (D2) || D1 | D0 || GRAY | + * +------+------+------++------+------++------+ + * | 1 | 1 | 1 || 1 | 1 || 0 0 | black + * | 1 | 0 | 0 || 1 | 0 || 0 1 | dark gray + * | 0 | 1 | 0 || 0 | 1 || 1 0 | light gray + * | 0 | 0 | 0 || 0 | 0 || 1 1 | white + */ + +static const u8 st7586_lookup[] = { 0x7, 0x4, 0x2, 0x0 }; + +static void st7586_xrgb8888_to_gray332(u8 *dst, void *vaddr, + struct drm_framebuffer *fb, + struct drm_rect *clip) +{ + size_t len = (clip->x2 - clip->x1) * (clip->y2 - clip->y1); + unsigned int x, y; + u8 *src, *buf, val; + struct iosys_map dst_map, vmap; + + buf = kmalloc(len, GFP_KERNEL); + if (!buf) + return; + + iosys_map_set_vaddr(&dst_map, buf); + iosys_map_set_vaddr(&vmap, vaddr); + drm_fb_xrgb8888_to_gray8(&dst_map, NULL, &vmap, fb, clip); + src = buf; + + for (y = clip->y1; y < clip->y2; y++) { + for (x = clip->x1; x < clip->x2; x += 3) { + val = st7586_lookup[*src++ >> 6] << 5; + val |= st7586_lookup[*src++ >> 6] << 2; + val |= st7586_lookup[*src++ >> 6] >> 1; + *dst++ = val; + } + } + + kfree(buf); +} + +static int st7586_buf_copy(void *dst, struct drm_framebuffer *fb, + struct drm_rect *clip) +{ + struct drm_gem_dma_object *dma_obj = drm_fb_dma_get_gem_obj(fb, 0); + void *src = dma_obj->vaddr; + int ret = 0; + + ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE); + if (ret) + return ret; + + st7586_xrgb8888_to_gray332(dst, src, fb, clip); + + drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE); + + return 0; +} + +static void st7586_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect) +{ + struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(fb->dev); + struct mipi_dbi *dbi = &dbidev->dbi; + int start, end, idx, ret = 0; + + if (!drm_dev_enter(fb->dev, &idx)) + return; + + /* 3 pixels per byte, so grow clip to nearest multiple of 3 */ + rect->x1 = rounddown(rect->x1, 3); + rect->x2 = roundup(rect->x2, 3); + + DRM_DEBUG_KMS("Flushing [FB:%d] " DRM_RECT_FMT "\n", fb->base.id, DRM_RECT_ARG(rect)); + + ret = st7586_buf_copy(dbidev->tx_buf, fb, rect); + if (ret) + goto err_msg; + + /* Pixels are packed 3 per byte */ + start = rect->x1 / 3; + end = rect->x2 / 3; + + mipi_dbi_command(dbi, MIPI_DCS_SET_COLUMN_ADDRESS, + (start >> 8) & 0xFF, start & 0xFF, + (end >> 8) & 0xFF, (end - 1) & 0xFF); + mipi_dbi_command(dbi, MIPI_DCS_SET_PAGE_ADDRESS, + (rect->y1 >> 8) & 0xFF, rect->y1 & 0xFF, + (rect->y2 >> 8) & 0xFF, (rect->y2 - 1) & 0xFF); + + ret = mipi_dbi_command_buf(dbi, MIPI_DCS_WRITE_MEMORY_START, + (u8 *)dbidev->tx_buf, + (end - start) * (rect->y2 - rect->y1)); +err_msg: + if (ret) + dev_err_once(fb->dev->dev, "Failed to update display %d\n", ret); + + drm_dev_exit(idx); +} + +static void st7586_pipe_update(struct drm_simple_display_pipe *pipe, + struct drm_plane_state *old_state) +{ + struct drm_plane_state *state = pipe->plane.state; + struct drm_rect rect; + + if (!pipe->crtc.state->active) + return; + + if (drm_atomic_helper_damage_merged(old_state, state, &rect)) + st7586_fb_dirty(state->fb, &rect); +} + +static void st7586_pipe_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state, + struct drm_plane_state *plane_state) +{ + struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev); + struct drm_framebuffer *fb = plane_state->fb; + struct mipi_dbi *dbi = &dbidev->dbi; + struct drm_rect rect = { + .x1 = 0, + .x2 = fb->width, + .y1 = 0, + .y2 = fb->height, + }; + int idx, ret; + u8 addr_mode; + + if (!drm_dev_enter(pipe->crtc.dev, &idx)) + return; + + DRM_DEBUG_KMS("\n"); + + ret = mipi_dbi_poweron_reset(dbidev); + if (ret) + goto out_exit; + + mipi_dbi_command(dbi, ST7586_AUTO_READ_CTRL, 0x9f); + mipi_dbi_command(dbi, ST7586_OTP_RW_CTRL, 0x00); + + msleep(10); + + mipi_dbi_command(dbi, ST7586_OTP_READ); + + msleep(20); + + mipi_dbi_command(dbi, ST7586_OTP_CTRL_OUT); + mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF); + + msleep(50); + + mipi_dbi_command(dbi, ST7586_SET_VOP_OFFSET, 0x00); + mipi_dbi_command(dbi, ST7586_SET_VOP, 0xe3, 0x00); + mipi_dbi_command(dbi, ST7586_SET_BIAS_SYSTEM, 0x02); + mipi_dbi_command(dbi, ST7586_SET_BOOST_LEVEL, 0x04); + mipi_dbi_command(dbi, ST7586_ENABLE_ANALOG, 0x1d); + mipi_dbi_command(dbi, ST7586_SET_NLINE_INV, 0x00); + mipi_dbi_command(dbi, ST7586_DISP_MODE_GRAY); + mipi_dbi_command(dbi, ST7586_ENABLE_DDRAM, 0x02); + + switch (dbidev->rotation) { + default: + addr_mode = 0x00; + break; + case 90: + addr_mode = ST7586_DISP_CTRL_MY; + break; + case 180: + addr_mode = ST7586_DISP_CTRL_MX | ST7586_DISP_CTRL_MY; + break; + case 270: + addr_mode = ST7586_DISP_CTRL_MX; + break; + } + mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode); + + mipi_dbi_command(dbi, ST7586_SET_DISP_DUTY, 0x7f); + mipi_dbi_command(dbi, ST7586_SET_PART_DISP, 0xa0); + mipi_dbi_command(dbi, MIPI_DCS_SET_PARTIAL_ROWS, 0x00, 0x00, 0x00, 0x77); + mipi_dbi_command(dbi, MIPI_DCS_EXIT_INVERT_MODE); + + msleep(100); + + st7586_fb_dirty(fb, &rect); + + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); +out_exit: + drm_dev_exit(idx); +} + +static void st7586_pipe_disable(struct drm_simple_display_pipe *pipe) +{ + struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev); + + /* + * This callback is not protected by drm_dev_enter/exit since we want to + * turn off the display on regular driver unload. It's highly unlikely + * that the underlying SPI controller is gone should this be called after + * unplug. + */ + + DRM_DEBUG_KMS("\n"); + + mipi_dbi_command(&dbidev->dbi, MIPI_DCS_SET_DISPLAY_OFF); +} + +static const u32 st7586_formats[] = { + DRM_FORMAT_XRGB8888, +}; + +static const struct drm_simple_display_pipe_funcs st7586_pipe_funcs = { + .enable = st7586_pipe_enable, + .disable = st7586_pipe_disable, + .update = st7586_pipe_update, +}; + +static const struct drm_display_mode st7586_mode = { + DRM_SIMPLE_MODE(178, 128, 37, 27), +}; + +DEFINE_DRM_GEM_DMA_FOPS(st7586_fops); + +static const struct drm_driver st7586_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, + .fops = &st7586_fops, + DRM_GEM_DMA_DRIVER_OPS_VMAP, + .debugfs_init = mipi_dbi_debugfs_init, + .name = "st7586", + .desc = "Sitronix ST7586", + .date = "20170801", + .major = 1, + .minor = 0, +}; + +static const struct of_device_id st7586_of_match[] = { + { .compatible = "lego,ev3-lcd" }, + {}, +}; +MODULE_DEVICE_TABLE(of, st7586_of_match); + +static const struct spi_device_id st7586_id[] = { + { "ev3-lcd", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(spi, st7586_id); + +static int st7586_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct mipi_dbi_dev *dbidev; + struct drm_device *drm; + struct mipi_dbi *dbi; + struct gpio_desc *a0; + u32 rotation = 0; + size_t bufsize; + int ret; + + dbidev = devm_drm_dev_alloc(dev, &st7586_driver, + struct mipi_dbi_dev, drm); + if (IS_ERR(dbidev)) + return PTR_ERR(dbidev); + + dbi = &dbidev->dbi; + drm = &dbidev->drm; + + bufsize = (st7586_mode.vdisplay + 2) / 3 * st7586_mode.hdisplay; + + dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(dbi->reset)) + return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n"); + + a0 = devm_gpiod_get(dev, "a0", GPIOD_OUT_LOW); + if (IS_ERR(a0)) + return dev_err_probe(dev, PTR_ERR(a0), "Failed to get GPIO 'a0'\n"); + + device_property_read_u32(dev, "rotation", &rotation); + + ret = mipi_dbi_spi_init(spi, dbi, a0); + if (ret) + return ret; + + /* Cannot read from this controller via SPI */ + dbi->read_commands = NULL; + + ret = mipi_dbi_dev_init_with_formats(dbidev, &st7586_pipe_funcs, + st7586_formats, ARRAY_SIZE(st7586_formats), + &st7586_mode, rotation, bufsize); + if (ret) + return ret; + + /* + * we are using 8-bit data, so we are not actually swapping anything, + * but setting mipi->swap_bytes makes mipi_dbi_typec3_command() do the + * right thing and not use 16-bit transfers (which results in swapped + * bytes on little-endian systems and causes out of order data to be + * sent to the display). + */ + dbi->swap_bytes = true; + + drm_mode_config_reset(drm); + + ret = drm_dev_register(drm, 0); + if (ret) + return ret; + + spi_set_drvdata(spi, drm); + + drm_fbdev_generic_setup(drm, 0); + + return 0; +} + +static void st7586_remove(struct spi_device *spi) +{ + struct drm_device *drm = spi_get_drvdata(spi); + + drm_dev_unplug(drm); + drm_atomic_helper_shutdown(drm); +} + +static void st7586_shutdown(struct spi_device *spi) +{ + drm_atomic_helper_shutdown(spi_get_drvdata(spi)); +} + +static struct spi_driver st7586_spi_driver = { + .driver = { + .name = "st7586", + .owner = THIS_MODULE, + .of_match_table = st7586_of_match, + }, + .id_table = st7586_id, + .probe = st7586_probe, + .remove = st7586_remove, + .shutdown = st7586_shutdown, +}; +module_spi_driver(st7586_spi_driver); + +MODULE_DESCRIPTION("Sitronix ST7586 DRM driver"); +MODULE_AUTHOR("David Lechner <david@lechnology.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/tiny/st7735r.c b/drivers/gpu/drm/tiny/st7735r.c new file mode 100644 index 000000000..c36ba08ac --- /dev/null +++ b/drivers/gpu/drm/tiny/st7735r.c @@ -0,0 +1,279 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * DRM driver for display panels connected to a Sitronix ST7715R or ST7735R + * display controller in SPI mode. + * + * Copyright 2017 David Lechner <david@lechnology.com> + * Copyright (C) 2019 Glider bvba + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/dma-buf.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/property.h> +#include <linux/spi/spi.h> +#include <video/mipi_display.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_drv.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_gem_dma_helper.h> +#include <drm/drm_managed.h> +#include <drm/drm_mipi_dbi.h> + +#define ST7735R_FRMCTR1 0xb1 +#define ST7735R_FRMCTR2 0xb2 +#define ST7735R_FRMCTR3 0xb3 +#define ST7735R_INVCTR 0xb4 +#define ST7735R_PWCTR1 0xc0 +#define ST7735R_PWCTR2 0xc1 +#define ST7735R_PWCTR3 0xc2 +#define ST7735R_PWCTR4 0xc3 +#define ST7735R_PWCTR5 0xc4 +#define ST7735R_VMCTR1 0xc5 +#define ST7735R_GAMCTRP1 0xe0 +#define ST7735R_GAMCTRN1 0xe1 + +#define ST7735R_MY BIT(7) +#define ST7735R_MX BIT(6) +#define ST7735R_MV BIT(5) +#define ST7735R_RGB BIT(3) + +struct st7735r_cfg { + const struct drm_display_mode mode; + unsigned int left_offset; + unsigned int top_offset; + unsigned int write_only:1; + unsigned int rgb:1; /* RGB (vs. BGR) */ +}; + +struct st7735r_priv { + struct mipi_dbi_dev dbidev; /* Must be first for .release() */ + const struct st7735r_cfg *cfg; +}; + +static void st7735r_pipe_enable(struct drm_simple_display_pipe *pipe, + struct drm_crtc_state *crtc_state, + struct drm_plane_state *plane_state) +{ + struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev); + struct st7735r_priv *priv = container_of(dbidev, struct st7735r_priv, + dbidev); + struct mipi_dbi *dbi = &dbidev->dbi; + int ret, idx; + u8 addr_mode; + + if (!drm_dev_enter(pipe->crtc.dev, &idx)) + return; + + DRM_DEBUG_KMS("\n"); + + ret = mipi_dbi_poweron_reset(dbidev); + if (ret) + goto out_exit; + + msleep(150); + + mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE); + msleep(500); + + mipi_dbi_command(dbi, ST7735R_FRMCTR1, 0x01, 0x2c, 0x2d); + mipi_dbi_command(dbi, ST7735R_FRMCTR2, 0x01, 0x2c, 0x2d); + mipi_dbi_command(dbi, ST7735R_FRMCTR3, 0x01, 0x2c, 0x2d, 0x01, 0x2c, + 0x2d); + mipi_dbi_command(dbi, ST7735R_INVCTR, 0x07); + mipi_dbi_command(dbi, ST7735R_PWCTR1, 0xa2, 0x02, 0x84); + mipi_dbi_command(dbi, ST7735R_PWCTR2, 0xc5); + mipi_dbi_command(dbi, ST7735R_PWCTR3, 0x0a, 0x00); + mipi_dbi_command(dbi, ST7735R_PWCTR4, 0x8a, 0x2a); + mipi_dbi_command(dbi, ST7735R_PWCTR5, 0x8a, 0xee); + mipi_dbi_command(dbi, ST7735R_VMCTR1, 0x0e); + mipi_dbi_command(dbi, MIPI_DCS_EXIT_INVERT_MODE); + switch (dbidev->rotation) { + default: + addr_mode = ST7735R_MX | ST7735R_MY; + break; + case 90: + addr_mode = ST7735R_MX | ST7735R_MV; + break; + case 180: + addr_mode = 0; + break; + case 270: + addr_mode = ST7735R_MY | ST7735R_MV; + break; + } + + if (priv->cfg->rgb) + addr_mode |= ST7735R_RGB; + + mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode); + mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, + MIPI_DCS_PIXEL_FMT_16BIT); + mipi_dbi_command(dbi, ST7735R_GAMCTRP1, 0x02, 0x1c, 0x07, 0x12, 0x37, + 0x32, 0x29, 0x2d, 0x29, 0x25, 0x2b, 0x39, 0x00, 0x01, + 0x03, 0x10); + mipi_dbi_command(dbi, ST7735R_GAMCTRN1, 0x03, 0x1d, 0x07, 0x06, 0x2e, + 0x2c, 0x29, 0x2d, 0x2e, 0x2e, 0x37, 0x3f, 0x00, 0x00, + 0x02, 0x10); + mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON); + + msleep(100); + + mipi_dbi_command(dbi, MIPI_DCS_ENTER_NORMAL_MODE); + + msleep(20); + + mipi_dbi_enable_flush(dbidev, crtc_state, plane_state); +out_exit: + drm_dev_exit(idx); +} + +static const struct drm_simple_display_pipe_funcs st7735r_pipe_funcs = { + .mode_valid = mipi_dbi_pipe_mode_valid, + .enable = st7735r_pipe_enable, + .disable = mipi_dbi_pipe_disable, + .update = mipi_dbi_pipe_update, +}; + +static const struct st7735r_cfg jd_t18003_t01_cfg = { + .mode = { DRM_SIMPLE_MODE(128, 160, 28, 35) }, + /* Cannot read from Adafruit 1.8" display via SPI */ + .write_only = true, +}; + +static const struct st7735r_cfg rh128128t_cfg = { + .mode = { DRM_SIMPLE_MODE(128, 128, 25, 26) }, + .left_offset = 2, + .top_offset = 3, + .rgb = true, +}; + +DEFINE_DRM_GEM_DMA_FOPS(st7735r_fops); + +static const struct drm_driver st7735r_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC, + .fops = &st7735r_fops, + DRM_GEM_DMA_DRIVER_OPS_VMAP, + .debugfs_init = mipi_dbi_debugfs_init, + .name = "st7735r", + .desc = "Sitronix ST7735R", + .date = "20171128", + .major = 1, + .minor = 0, +}; + +static const struct of_device_id st7735r_of_match[] = { + { .compatible = "jianda,jd-t18003-t01", .data = &jd_t18003_t01_cfg }, + { .compatible = "okaya,rh128128t", .data = &rh128128t_cfg }, + { }, +}; +MODULE_DEVICE_TABLE(of, st7735r_of_match); + +static const struct spi_device_id st7735r_id[] = { + { "jd-t18003-t01", (uintptr_t)&jd_t18003_t01_cfg }, + { "rh128128t", (uintptr_t)&rh128128t_cfg }, + { }, +}; +MODULE_DEVICE_TABLE(spi, st7735r_id); + +static int st7735r_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + const struct st7735r_cfg *cfg; + struct mipi_dbi_dev *dbidev; + struct st7735r_priv *priv; + struct drm_device *drm; + struct mipi_dbi *dbi; + struct gpio_desc *dc; + u32 rotation = 0; + int ret; + + cfg = device_get_match_data(&spi->dev); + if (!cfg) + cfg = (void *)spi_get_device_id(spi)->driver_data; + + priv = devm_drm_dev_alloc(dev, &st7735r_driver, + struct st7735r_priv, dbidev.drm); + if (IS_ERR(priv)) + return PTR_ERR(priv); + + dbidev = &priv->dbidev; + priv->cfg = cfg; + + dbi = &dbidev->dbi; + drm = &dbidev->drm; + + dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(dbi->reset)) + return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n"); + + dc = devm_gpiod_get(dev, "dc", GPIOD_OUT_LOW); + if (IS_ERR(dc)) + return dev_err_probe(dev, PTR_ERR(dc), "Failed to get GPIO 'dc'\n"); + + dbidev->backlight = devm_of_find_backlight(dev); + if (IS_ERR(dbidev->backlight)) + return PTR_ERR(dbidev->backlight); + + device_property_read_u32(dev, "rotation", &rotation); + + ret = mipi_dbi_spi_init(spi, dbi, dc); + if (ret) + return ret; + + if (cfg->write_only) + dbi->read_commands = NULL; + + dbidev->left_offset = cfg->left_offset; + dbidev->top_offset = cfg->top_offset; + + ret = mipi_dbi_dev_init(dbidev, &st7735r_pipe_funcs, &cfg->mode, + rotation); + if (ret) + return ret; + + drm_mode_config_reset(drm); + + ret = drm_dev_register(drm, 0); + if (ret) + return ret; + + spi_set_drvdata(spi, drm); + + drm_fbdev_generic_setup(drm, 0); + + return 0; +} + +static void st7735r_remove(struct spi_device *spi) +{ + struct drm_device *drm = spi_get_drvdata(spi); + + drm_dev_unplug(drm); + drm_atomic_helper_shutdown(drm); +} + +static void st7735r_shutdown(struct spi_device *spi) +{ + drm_atomic_helper_shutdown(spi_get_drvdata(spi)); +} + +static struct spi_driver st7735r_spi_driver = { + .driver = { + .name = "st7735r", + .of_match_table = st7735r_of_match, + }, + .id_table = st7735r_id, + .probe = st7735r_probe, + .remove = st7735r_remove, + .shutdown = st7735r_shutdown, +}; +module_spi_driver(st7735r_spi_driver); + +MODULE_DESCRIPTION("Sitronix ST7735R DRM driver"); +MODULE_AUTHOR("David Lechner <david@lechnology.com>"); +MODULE_LICENSE("GPL"); |