| // 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> |
| |
| 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) |
| dev_err(panel->dev, "failed to set display off: %d\n", ret); |
| |
| ret = mipi_dsi_dcs_enter_sleep_mode(dsi); |
| if (ret < 0) { |
| dev_err(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) { |
| dev_err(ctx->dev, "Failed to enable vci supply: %d\n", ret); |
| return ret; |
| } |
| ret = regulator_enable(ctx->iovcc); |
| if (ret < 0) { |
| dev_err(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) { |
| dev_err(panel->dev, "failed to write init cmds: %d\n", ret); |
| goto disable_iovcc; |
| } |
| } |
| |
| ret = mipi_dsi_dcs_exit_sleep_mode(dsi); |
| if (ret < 0) { |
| dev_err(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) { |
| dev_err(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, |
| .clock = 69217, |
| .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) { |
| dev_err(ctx->dev, "failed to add mode %ux%u@%u\n", |
| default_mode.hdisplay, default_mode.vdisplay, |
| drm_mode_vrefresh(&default_mode)); |
| 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)) { |
| dev_err(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) |
| dev_err(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) |
| dev_err(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_NO_EOT_PACKET; |
| |
| drm_panel_init(&ctx->panel, &dsi->dev, <k500hd1829_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) { |
| dev_err(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) |
| dev_err(&dsi->dev, "Failed to unprepare panel: %d\n", ret); |
| |
| ret = drm_panel_disable(&ctx->panel); |
| if (ret < 0) |
| dev_err(&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) |
| dev_err(&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"); |
