// SPDX-License-Identifier: GPL-2.0+ /* * Motorola ATRIX 4G and DROID X2 DSI panel driver * Exact manufacturer and model unknown * * Copyright (c) 2025 Svyatoslav Ryhel */ #include #include #include #include #include #include #include #include #include #include #include struct mot_panel_priv { struct udevice *vdd; struct udevice *vddio; struct udevice *backlight; struct gpio_desc reset_gpio; }; #define dsi_generic_write_seq(dsi, cmd, seq...) do { \ static const u8 b[] = { cmd, seq }; \ int ret; \ ret = mipi_dsi_dcs_write_buffer(dsi, b, ARRAY_SIZE(b)); \ if (ret < 0) \ return ret; \ } while (0) static struct display_timing default_timing = { .pixelclock.typ = 38250000, .hactive.typ = 540, .hfront_porch.typ = 32, .hback_porch.typ = 32, .hsync_len.typ = 16, .vactive.typ = 960, .vfront_porch.typ = 12, .vback_porch.typ = 12, .vsync_len.typ = 8, }; static int mot_es2(struct mipi_dsi_device *dsi) { int ret; dsi_generic_write_seq(dsi, 0x55, 0x01); ret = mipi_dsi_dcs_exit_sleep_mode(dsi); if (ret < 0) { log_debug("%s: failed to exit sleep mode: %d\n", __func__, ret); return ret; } mdelay(120); dsi_generic_write_seq(dsi, 0xf4, 0x00, 0xbb, 0x46, 0x53, 0x0c, 0x49, 0x74, 0x29, 0x12, 0x15, 0x2f, 0x2f, 0x04); dsi_generic_write_seq(dsi, 0xf8, 0x4b, 0x04, 0x10, 0x1a, 0x2c, 0x2c, 0x2c, 0x2c, 0x14, 0x12); dsi_generic_write_seq(dsi, 0xb5, 0x03, 0x7f, 0x00, 0x80, 0xc7, 0x00); dsi_generic_write_seq(dsi, 0xb7, 0x66, 0xf6, 0x46, 0x9f, 0x90, 0x99, 0xff, 0x80, 0x6d, 0x01); /* Gamma R */ dsi_generic_write_seq(dsi, 0xf9, 0x04); dsi_generic_write_seq(dsi, 0xfa, 0x00, 0x2f, 0x30, 0x12, 0x0e, 0x0c, 0x22, 0x27, 0x31, 0x2e, 0x07, 0x0f); dsi_generic_write_seq(dsi, 0xfb, 0x00, 0x2f, 0x30, 0x12, 0x0e, 0x0c, 0x22, 0x27, 0x31, 0x2e, 0x07, 0x0f); /* Gamma G */ dsi_generic_write_seq(dsi, 0xf9, 0x02); dsi_generic_write_seq(dsi, 0xfa, 0x00, 0x2f, 0x37, 0x15, 0x15, 0x11, 0x1f, 0x25, 0x2d, 0x2a, 0x05, 0x0f); dsi_generic_write_seq(dsi, 0xfb, 0x00, 0x2f, 0x37, 0x15, 0x15, 0x11, 0x1f, 0x25, 0x2d, 0x2a, 0x05, 0x0f); /* Gamma B */ dsi_generic_write_seq(dsi, 0xf9, 0x01); dsi_generic_write_seq(dsi, 0xfa, 0x00, 0x2f, 0x3f, 0x16, 0x1f, 0x15, 0x1f, 0x25, 0x2d, 0x2b, 0x06, 0x0b); dsi_generic_write_seq(dsi, 0xfb, 0x00, 0x2f, 0x3f, 0x16, 0x1f, 0x15, 0x1f, 0x25, 0x2d, 0x2b, 0x06, 0x0b); /* Gamma W */ dsi_generic_write_seq(dsi, 0xf9, 0x20); dsi_generic_write_seq(dsi, 0xfa, 0x00, 0x2f, 0x34, 0x15, 0x1a, 0x11, 0x1f, 0x23, 0x2d, 0x29, 0x02, 0x08); dsi_generic_write_seq(dsi, 0xfb, 0x00, 0x2f, 0x34, 0x15, 0x1a, 0x11, 0x1f, 0x23, 0x2d, 0x29, 0x02, 0x08); dsi_generic_write_seq(dsi, 0x53, 0x2c); dsi_generic_write_seq(dsi, 0x35, 0x00); return 0; } static int __maybe_unused mot_es4(struct mipi_dsi_device *dsi) { int ret; dsi_generic_write_seq(dsi, 0xd2, 0x04, 0x53); dsi_generic_write_seq(dsi, 0xd2, 0x05, 0x53); dsi_generic_write_seq(dsi, 0x55, 0x01); ret = mipi_dsi_dcs_exit_sleep_mode(dsi); if (ret < 0) { log_debug("%s: failed to exit sleep mode: %d\n", __func__, ret); return ret; } mdelay(120); dsi_generic_write_seq(dsi, 0xb5, 0x03, 0x7f, 0x0a, 0x80, 0xff, 0x00); dsi_generic_write_seq(dsi, 0xb7, 0x7a, 0xf7, 0x4d, 0x91, 0x90, 0xb3, 0xff, 0x80, 0x6d, 0x01); dsi_generic_write_seq(dsi, 0xf4, 0x00, 0xbb, 0x46, 0x53, 0x0c, 0x49, 0x74, 0x29, 0x12, 0x15, 0x37, 0x37, 0x04); dsi_generic_write_seq(dsi, 0xf8, 0x0a, 0x04, 0x10, 0x2a, 0x35, 0x35, 0x35, 0x35, 0x21, 0x1a); /* Gamma R */ dsi_generic_write_seq(dsi, 0xf9, 0x04); dsi_generic_write_seq(dsi, 0xfa, 0x08, 0x1c, 0x1b, 0x0f, 0x0f, 0x0a, 0x1e, 0x22, 0x27, 0x26, 0x07, 0x0d); dsi_generic_write_seq(dsi, 0xfb, 0x08, 0x3c, 0x27, 0x0f, 0x0f, 0x0a, 0x1e, 0x26, 0x31, 0x2f, 0x07, 0x0b); /* Gamma G */ dsi_generic_write_seq(dsi, 0xf9, 0x02); dsi_generic_write_seq(dsi, 0xfa, 0x30, 0x14, 0x0f, 0x00, 0x06, 0x02, 0x1e, 0x22, 0x27, 0x27, 0x08, 0x10); dsi_generic_write_seq(dsi, 0xfb, 0x30, 0x35, 0x0f, 0x00, 0x0a, 0x02, 0x1c, 0x23, 0x31, 0x2f, 0x08, 0x0e); /* Gamma B */ dsi_generic_write_seq(dsi, 0xf9, 0x01); dsi_generic_write_seq(dsi, 0xfa, 0x12, 0x1b, 0x26, 0x0e, 0x12, 0x0b, 0x1e, 0x22, 0x27, 0x27, 0x06, 0x0c); dsi_generic_write_seq(dsi, 0xfb, 0x12, 0x3b, 0x2c, 0x12, 0x12, 0x0e, 0x1e, 0x26, 0x31, 0x2f, 0x06, 0x0d); /* Gamma W */ dsi_generic_write_seq(dsi, 0xf9, 0x20); dsi_generic_write_seq(dsi, 0xfa, 0x37, 0x1b, 0x09, 0x01, 0x06, 0x04, 0x19, 0x19, 0x22, 0x24, 0x04, 0x15); dsi_generic_write_seq(dsi, 0xfb, 0x37, 0x3b, 0x17, 0x01, 0x0a, 0x04, 0x19, 0x1d, 0x2c, 0x2c, 0x04, 0x13); dsi_generic_write_seq(dsi, 0x53, 0x2c); dsi_generic_write_seq(dsi, 0x35, 0x00); dsi_generic_write_seq(dsi, 0xc3, 0x01, 0x4e); return 0; } static int mot_panel_enable_backlight(struct udevice *dev) { struct mipi_dsi_panel_plat *plat = dev_get_plat(dev); struct mipi_dsi_device *dsi = plat->device; int ret; dsi_generic_write_seq(dsi, 0xf0, 0x5a, 0x5a); dsi_generic_write_seq(dsi, 0xf1, 0x5a, 0x5a); dsi_generic_write_seq(dsi, 0xd0, 0x8e); ret = mot_es2(dsi); if (ret) return ret; ret = mipi_dsi_dcs_set_display_on(dsi); if (ret < 0) { log_debug("%s: failed to set display on: %d\n", __func__, ret); return ret; } mdelay(20); return 0; } static int mot_panel_set_backlight(struct udevice *dev, int percent) { struct mot_panel_priv *priv = dev_get_priv(dev); int ret; ret = backlight_enable(priv->backlight); if (ret) return ret; mdelay(5); return backlight_set_brightness(priv->backlight, percent); } static int mot_panel_timings(struct udevice *dev, struct display_timing *timing) { memcpy(timing, &default_timing, sizeof(*timing)); return 0; } static int mot_panel_of_to_plat(struct udevice *dev) { struct mot_panel_priv *priv = dev_get_priv(dev); int ret; ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev, "backlight", &priv->backlight); if (ret) { log_debug("%s: cannot get backlight: ret = %d\n", __func__, ret); return ret; } ret = device_get_supply_regulator(dev, "vdd-supply", &priv->vdd); if (ret) { log_debug("%s: cannot get vdd-supply: ret = %d\n", __func__, ret); return ret; } ret = device_get_supply_regulator(dev, "vddio-supply", &priv->vddio); if (ret) { log_debug("%s: cannot get vddio-supply: ret = %d\n", __func__, ret); return ret; } ret = gpio_request_by_name(dev, "reset-gpios", 0, &priv->reset_gpio, GPIOD_IS_OUT); if (ret) { log_debug("%s: could not decode reser-gpios (%d)\n", __func__, ret); return ret; } return 0; } static int mot_panel_hw_init(struct udevice *dev) { struct mot_panel_priv *priv = dev_get_priv(dev); int ret; ret = regulator_set_enable_if_allowed(priv->vddio, 1); if (ret) { log_debug("%s: enabling vddio-supply failed (%d)\n", __func__, ret); return ret; } ret = regulator_set_enable_if_allowed(priv->vdd, 1); if (ret) { log_debug("%s: enabling vdd-supply failed (%d)\n", __func__, ret); return ret; } ret = dm_gpio_set_value(&priv->reset_gpio, 1); if (ret) { log_debug("%s: error entering reset (%d)\n", __func__, ret); return ret; } mdelay(50); ret = dm_gpio_set_value(&priv->reset_gpio, 0); if (ret) { log_debug("%s: error exiting reset (%d)\n", __func__, ret); return ret; } mdelay(10); return 0; } static int mot_panel_probe(struct udevice *dev) { struct mipi_dsi_panel_plat *plat = dev_get_plat(dev); /* fill characteristics of DSI data link */ plat->lanes = 2; plat->format = MIPI_DSI_FMT_RGB888; plat->mode_flags = MIPI_DSI_MODE_LPM; return mot_panel_hw_init(dev); } static const struct panel_ops mot_panel_ops = { .enable_backlight = mot_panel_enable_backlight, .set_backlight = mot_panel_set_backlight, .get_display_timing = mot_panel_timings, }; static const struct udevice_id mot_panel_ids[] = { { .compatible = "motorola,mot-panel" }, { } }; U_BOOT_DRIVER(mot_panel) = { .name = "mot_panel", .id = UCLASS_PANEL, .of_match = mot_panel_ids, .ops = &mot_panel_ops, .of_to_plat = mot_panel_of_to_plat, .probe = mot_panel_probe, .plat_auto = sizeof(struct mipi_dsi_panel_plat), .priv_auto = sizeof(struct mot_panel_priv), };