From: Heiko Stuebner heiko.stuebner@theobroma-systems.com

The LTK500HD1829 is 5.5" DSI display.

changes in v4: - drop error message if backlight not found, no other panel does that and if needed it should live in drm_panel_of_backlight changes in v3: - drop one more overlooked panel->drm access

Signed-off-by: Heiko Stuebner heiko.stuebner@theobroma-systems.com --- drivers/gpu/drm/panel/Kconfig | 11 + drivers/gpu/drm/panel/Makefile | 1 + .../drm/panel/panel-leadtek-ltk500hd1829.c | 532 ++++++++++++++++++ 3 files changed, 544 insertions(+) create mode 100644 drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index d86d875de783..41f796b28dd5 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -109,6 +109,17 @@ config DRM_PANEL_KINGDISPLAY_KD097D04 24 bit RGB per pixel. It provides a MIPI DSI interface to the host and has a built-in LED backlight.

+config DRM_PANEL_LEADTEK_LTK500HD1829 + tristate "Leadtek LTK500HD1829 panel" + depends on OF + depends on DRM_MIPI_DSI + depends on BACKLIGHT_CLASS_DEVICE + help + Say Y here if you want to enable support for Kingdisplay kd097d04 + TFT-LCD modules. The panel has a 1536x2048 resolution and uses + 24 bit RGB per pixel. It provides a MIPI DSI interface to + the host and has a built-in LED backlight. + config DRM_PANEL_SAMSUNG_LD9040 tristate "Samsung LD9040 RGB/SPI panel" depends on OF && SPI diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index f7cf83672fb8..4dc7acff21b9 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -9,6 +9,7 @@ obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9881C) += panel-ilitek-ili9881c.o obj-$(CONFIG_DRM_PANEL_INNOLUX_P079ZCA) += panel-innolux-p079zca.o obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o obj-$(CONFIG_DRM_PANEL_KINGDISPLAY_KD097D04) += panel-kingdisplay-kd097d04.o +obj-$(CONFIG_DRM_PANEL_LEADTEK_LTK500HD1829) += panel-leadtek-ltk500hd1829.o obj-$(CONFIG_DRM_PANEL_LG_LB035Q02) += panel-lg-lb035q02.o obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o obj-$(CONFIG_DRM_PANEL_NEC_NL8048HL11) += panel-nec-nl8048hl11.o diff --git a/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c b/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c new file mode 100644 index 000000000000..07494b124301 --- /dev/null +++ b/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c @@ -0,0 +1,532 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2019 Theobroma Systems Design und Consulting GmbH + * + * base on panel-kingdisplay-kd097d04.c + * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/regulator/consumer.h> + +#include <video/mipi_display.h> + +#include <drm/drm_crtc.h> +#include <drm/drm_device.h> +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_modes.h> +#include <drm/drm_panel.h> +#include <drm/drm_print.h> + +struct ltk500hd1829 { + struct device *dev; + struct drm_panel panel; + struct gpio_desc *reset_gpio; + struct regulator *vcc; + struct regulator *iovcc; + bool prepared; +}; + +struct ltk500hd1829_cmd { + char cmd; + char data; +}; + +/* + * There is no description in the Reference Manual about these commands. + * We received them from the vendor, so just use them as is. + */ +static const struct ltk500hd1829_cmd init_code[] = { + { 0xE0, 0x00 }, + { 0xE1, 0x93 }, + { 0xE2, 0x65 }, + { 0xE3, 0xF8 }, + { 0x80, 0x03 }, + { 0xE0, 0x04 }, + { 0x2D, 0x03 }, + { 0xE0, 0x01 }, + { 0x00, 0x00 }, + { 0x01, 0xB6 }, + { 0x03, 0x00 }, + { 0x04, 0xC5 }, + { 0x17, 0x00 }, + { 0x18, 0xBF }, + { 0x19, 0x01 }, + { 0x1A, 0x00 }, + { 0x1B, 0xBF }, + { 0x1C, 0x01 }, + { 0x1F, 0x7C }, + { 0x20, 0x26 }, + { 0x21, 0x26 }, + { 0x22, 0x4E }, + { 0x37, 0x09 }, + { 0x38, 0x04 }, + { 0x39, 0x08 }, + { 0x3A, 0x1F }, + { 0x3B, 0x1F }, + { 0x3C, 0x78 }, + { 0x3D, 0xFF }, + { 0x3E, 0xFF }, + { 0x3F, 0x00 }, + { 0x40, 0x04 }, + { 0x41, 0xA0 }, + { 0x43, 0x0F }, + { 0x44, 0x0A }, + { 0x45, 0x24 }, + { 0x55, 0x01 }, + { 0x56, 0x01 }, + { 0x57, 0xA5 }, + { 0x58, 0x0A }, + { 0x59, 0x4A }, + { 0x5A, 0x38 }, + { 0x5B, 0x10 }, + { 0x5C, 0x19 }, + { 0x5D, 0x7C }, + { 0x5E, 0x64 }, + { 0x5F, 0x54 }, + { 0x60, 0x48 }, + { 0x61, 0x44 }, + { 0x62, 0x35 }, + { 0x63, 0x3A }, + { 0x64, 0x24 }, + { 0x65, 0x3B }, + { 0x66, 0x39 }, + { 0x67, 0x37 }, + { 0x68, 0x56 }, + { 0x69, 0x41 }, + { 0x6A, 0x47 }, + { 0x6B, 0x2F }, + { 0x6C, 0x23 }, + { 0x6D, 0x13 }, + { 0x6E, 0x02 }, + { 0x6F, 0x08 }, + { 0x70, 0x7C }, + { 0x71, 0x64 }, + { 0x72, 0x54 }, + { 0x73, 0x48 }, + { 0x74, 0x44 }, + { 0x75, 0x35 }, + { 0x76, 0x3A }, + { 0x77, 0x22 }, + { 0x78, 0x3B }, + { 0x79, 0x39 }, + { 0x7A, 0x38 }, + { 0x7B, 0x52 }, + { 0x7C, 0x41 }, + { 0x7D, 0x47 }, + { 0x7E, 0x2F }, + { 0x7F, 0x23 }, + { 0x80, 0x13 }, + { 0x81, 0x02 }, + { 0x82, 0x08 }, + { 0xE0, 0x02 }, + { 0x00, 0x57 }, + { 0x01, 0x77 }, + { 0x02, 0x44 }, + { 0x03, 0x46 }, + { 0x04, 0x48 }, + { 0x05, 0x4A }, + { 0x06, 0x4C }, + { 0x07, 0x4E }, + { 0x08, 0x50 }, + { 0x09, 0x55 }, + { 0x0A, 0x52 }, + { 0x0B, 0x55 }, + { 0x0C, 0x55 }, + { 0x0D, 0x55 }, + { 0x0E, 0x55 }, + { 0x0F, 0x55 }, + { 0x10, 0x55 }, + { 0x11, 0x55 }, + { 0x12, 0x55 }, + { 0x13, 0x40 }, + { 0x14, 0x55 }, + { 0x15, 0x55 }, + { 0x16, 0x57 }, + { 0x17, 0x77 }, + { 0x18, 0x45 }, + { 0x19, 0x47 }, + { 0x1A, 0x49 }, + { 0x1B, 0x4B }, + { 0x1C, 0x4D }, + { 0x1D, 0x4F }, + { 0x1E, 0x51 }, + { 0x1F, 0x55 }, + { 0x20, 0x53 }, + { 0x21, 0x55 }, + { 0x22, 0x55 }, + { 0x23, 0x55 }, + { 0x24, 0x55 }, + { 0x25, 0x55 }, + { 0x26, 0x55 }, + { 0x27, 0x55 }, + { 0x28, 0x55 }, + { 0x29, 0x41 }, + { 0x2A, 0x55 }, + { 0x2B, 0x55 }, + { 0x2C, 0x57 }, + { 0x2D, 0x77 }, + { 0x2E, 0x4F }, + { 0x2F, 0x4D }, + { 0x30, 0x4B }, + { 0x31, 0x49 }, + { 0x32, 0x47 }, + { 0x33, 0x45 }, + { 0x34, 0x41 }, + { 0x35, 0x55 }, + { 0x36, 0x53 }, + { 0x37, 0x55 }, + { 0x38, 0x55 }, + { 0x39, 0x55 }, + { 0x3A, 0x55 }, + { 0x3B, 0x55 }, + { 0x3C, 0x55 }, + { 0x3D, 0x55 }, + { 0x3E, 0x55 }, + { 0x3F, 0x51 }, + { 0x40, 0x55 }, + { 0x41, 0x55 }, + { 0x42, 0x57 }, + { 0x43, 0x77 }, + { 0x44, 0x4E }, + { 0x45, 0x4C }, + { 0x46, 0x4A }, + { 0x47, 0x48 }, + { 0x48, 0x46 }, + { 0x49, 0x44 }, + { 0x4A, 0x40 }, + { 0x4B, 0x55 }, + { 0x4C, 0x52 }, + { 0x4D, 0x55 }, + { 0x4E, 0x55 }, + { 0x4F, 0x55 }, + { 0x50, 0x55 }, + { 0x51, 0x55 }, + { 0x52, 0x55 }, + { 0x53, 0x55 }, + { 0x54, 0x55 }, + { 0x55, 0x50 }, + { 0x56, 0x55 }, + { 0x57, 0x55 }, + { 0x58, 0x40 }, + { 0x59, 0x00 }, + { 0x5A, 0x00 }, + { 0x5B, 0x10 }, + { 0x5C, 0x09 }, + { 0x5D, 0x30 }, + { 0x5E, 0x01 }, + { 0x5F, 0x02 }, + { 0x60, 0x30 }, + { 0x61, 0x03 }, + { 0x62, 0x04 }, + { 0x63, 0x06 }, + { 0x64, 0x6A }, + { 0x65, 0x75 }, + { 0x66, 0x0F }, + { 0x67, 0xB3 }, + { 0x68, 0x0B }, + { 0x69, 0x06 }, + { 0x6A, 0x6A }, + { 0x6B, 0x10 }, + { 0x6C, 0x00 }, + { 0x6D, 0x04 }, + { 0x6E, 0x04 }, + { 0x6F, 0x88 }, + { 0x70, 0x00 }, + { 0x71, 0x00 }, + { 0x72, 0x06 }, + { 0x73, 0x7B }, + { 0x74, 0x00 }, + { 0x75, 0xBC }, + { 0x76, 0x00 }, + { 0x77, 0x05 }, + { 0x78, 0x2E }, + { 0x79, 0x00 }, + { 0x7A, 0x00 }, + { 0x7B, 0x00 }, + { 0x7C, 0x00 }, + { 0x7D, 0x03 }, + { 0x7E, 0x7B }, + { 0xE0, 0x04 }, + { 0x09, 0x10 }, + { 0x2B, 0x2B }, + { 0x2E, 0x44 }, + { 0xE0, 0x00 }, + { 0xE6, 0x02 }, + { 0xE7, 0x02 }, + { 0x35, 0x00 }, +}; + +static inline +struct ltk500hd1829 *panel_to_ltk500hd1829(struct drm_panel *panel) +{ + return container_of(panel, struct ltk500hd1829, panel); +} + +static int ltk500hd1829_unprepare(struct drm_panel *panel) +{ + struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel); + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); + int ret; + + if (!ctx->prepared) + return 0; + + ret = mipi_dsi_dcs_set_display_off(dsi); + if (ret < 0) + DRM_DEV_ERROR(panel->dev, "failed to set display off: %d\n", + ret); + + ret = mipi_dsi_dcs_enter_sleep_mode(dsi); + if (ret < 0) { + DRM_DEV_ERROR(panel->dev, "failed to enter sleep mode: %d\n", + ret); + } + + /* 120ms to enter sleep mode */ + msleep(120); + + regulator_disable(ctx->iovcc); + regulator_disable(ctx->vcc); + + ctx->prepared = false; + + return 0; +} + +static int ltk500hd1829_prepare(struct drm_panel *panel) +{ + struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel); + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); + unsigned int i; + int ret; + + if (ctx->prepared) + return 0; + + ret = regulator_enable(ctx->vcc); + if (ret < 0) { + DRM_DEV_ERROR(ctx->dev, + "Failed to enable vci supply: %d\n", ret); + return ret; + } + ret = regulator_enable(ctx->iovcc); + if (ret < 0) { + DRM_DEV_ERROR(ctx->dev, + "Failed to enable iovcc supply: %d\n", ret); + goto disable_vcc; + } + + gpiod_set_value_cansleep(ctx->reset_gpio, 1); + /* tRW: 10us */ + usleep_range(10, 20); + gpiod_set_value_cansleep(ctx->reset_gpio, 0); + + /* tRT: >= 5ms */ + usleep_range(5000, 6000); + + for (i = 0; i < ARRAY_SIZE(init_code); i++) { + ret = mipi_dsi_generic_write(dsi, &init_code[i], + sizeof(struct ltk500hd1829_cmd)); + if (ret < 0) { + DRM_DEV_ERROR(panel->dev, "failed towrite init cmds: %d\n", + ret); + goto disable_iovcc; + } + } + + ret = mipi_dsi_dcs_exit_sleep_mode(dsi); + if (ret < 0) { + DRM_DEV_ERROR(panel->dev, "failed to exit sleep mode: %d\n", + ret); + goto disable_iovcc; + } + + /* 120ms to exit sleep mode */ + msleep(120); + + ret = mipi_dsi_dcs_set_display_on(dsi); + if (ret < 0) { + DRM_DEV_ERROR(panel->dev, "failed to set display on: %d\n", + ret); + goto disable_iovcc; + } + + ctx->prepared = true; + + return 0; + +disable_iovcc: + regulator_disable(ctx->iovcc); +disable_vcc: + regulator_disable(ctx->vcc); + return ret; +} + +static const struct drm_display_mode default_mode = { + .hdisplay = 720, + .hsync_start = 720 + 50, + .hsync_end = 720 + 50 + 50, + .htotal = 720 + 50 + 50 + 50, + .vdisplay = 1280, + .vsync_start = 1280 + 30, + .vsync_end = 1280 + 30 + 4, + .vtotal = 1280 + 30 + 4 + 12, + .vrefresh = 60, + .clock = 41600, + .width_mm = 62, + .height_mm = 110, +}; + +static int ltk500hd1829_get_modes(struct drm_panel *panel, + struct drm_connector *connector) +{ + struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel); + struct drm_display_mode *mode; + + mode = drm_mode_duplicate(connector->dev, &default_mode); + if (!mode) { + DRM_DEV_ERROR(ctx->dev, "failed to add mode %ux%ux@%u\n", + default_mode.hdisplay, default_mode.vdisplay, + default_mode.vrefresh); + return -ENOMEM; + } + + drm_mode_set_name(mode); + + mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; + connector->display_info.width_mm = mode->width_mm; + connector->display_info.height_mm = mode->height_mm; + drm_mode_probed_add(connector, mode); + + return 1; +} + +static const struct drm_panel_funcs ltk500hd1829_funcs = { + .unprepare = ltk500hd1829_unprepare, + .prepare = ltk500hd1829_prepare, + .get_modes = ltk500hd1829_get_modes, +}; + +static int ltk500hd1829_probe(struct mipi_dsi_device *dsi) +{ + struct ltk500hd1829 *ctx; + struct device *dev = &dsi->dev; + int ret; + + ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(ctx->reset_gpio)) { + DRM_DEV_ERROR(dev, "cannot get reset gpio\n"); + return PTR_ERR(ctx->reset_gpio); + } + + ctx->vcc = devm_regulator_get(dev, "vcc"); + if (IS_ERR(ctx->vcc)) { + ret = PTR_ERR(ctx->vcc); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, + "Failed to request vcc regulator: %d\n", + ret); + return ret; + } + + ctx->iovcc = devm_regulator_get(dev, "iovcc"); + if (IS_ERR(ctx->iovcc)) { + ret = PTR_ERR(ctx->iovcc); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, + "Failed to request iovcc regulator: %d\n", + ret); + return ret; + } + + mipi_dsi_set_drvdata(dsi, ctx); + + ctx->dev = dev; + + dsi->lanes = 4; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | + MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET; + + drm_panel_init(&ctx->panel, &dsi->dev, &ltk500hd1829_funcs, + DRM_MODE_CONNECTOR_DSI); + + ret = drm_panel_of_backlight(&ctx->panel); + if (ret) + return ret; + + drm_panel_add(&ctx->panel); + + ret = mipi_dsi_attach(dsi); + if (ret < 0) { + DRM_DEV_ERROR(dev, "mipi_dsi_attach failed: %d\n", ret); + drm_panel_remove(&ctx->panel); + return ret; + } + + return 0; +} + +static void ltk500hd1829_shutdown(struct mipi_dsi_device *dsi) +{ + struct ltk500hd1829 *ctx = mipi_dsi_get_drvdata(dsi); + int ret; + + ret = drm_panel_unprepare(&ctx->panel); + if (ret < 0) + DRM_DEV_ERROR(&dsi->dev, "Failed to unprepare panel: %d\n", + ret); + + ret = drm_panel_disable(&ctx->panel); + if (ret < 0) + DRM_DEV_ERROR(&dsi->dev, "Failed to disable panel: %d\n", + ret); +} + +static int ltk500hd1829_remove(struct mipi_dsi_device *dsi) +{ + struct ltk500hd1829 *ctx = mipi_dsi_get_drvdata(dsi); + int ret; + + ltk500hd1829_shutdown(dsi); + + ret = mipi_dsi_detach(dsi); + if (ret < 0) + DRM_DEV_ERROR(&dsi->dev, "failed to detach from DSI host: %d\n", + ret); + + drm_panel_remove(&ctx->panel); + + return 0; +} + +static const struct of_device_id ltk500hd1829_of_match[] = { + { .compatible = "leadtek,ltk500hd1829", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ltk500hd1829_of_match); + +static struct mipi_dsi_driver ltk500hd1829_driver = { + .driver = { + .name = "panel-leadtek-ltk500hd1829", + .of_match_table = ltk500hd1829_of_match, + }, + .probe = ltk500hd1829_probe, + .remove = ltk500hd1829_remove, + .shutdown = ltk500hd1829_shutdown, +}; +module_mipi_dsi_driver(ltk500hd1829_driver); + +MODULE_AUTHOR("Heiko Stuebner heiko.stuebner@theobroma-systems.com"); +MODULE_DESCRIPTION("Leadtek LTK500HD1829 panel driver"); +MODULE_LICENSE("GPL v2");