| // 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 <clamor95@gmail.com> |
| */ |
| |
| #include <backlight.h> |
| #include <dm.h> |
| #include <panel.h> |
| #include <log.h> |
| #include <misc.h> |
| #include <mipi_display.h> |
| #include <mipi_dsi.h> |
| #include <asm/gpio.h> |
| #include <linux/delay.h> |
| #include <linux/err.h> |
| #include <power/regulator.h> |
| |
| 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), |
| }; |