// SPDX-License-Identifier: GPL-2.0+ /* * Renesas R61307 panel driver * * Copyright (c) 2022 Svyatoslav Ryhel */ #include #include #include #include #include #include #include #include #include #include #include #include /* * The datasheet is not publicly available, all values are * taken from the downstream. If you have access to datasheets, * corrections are welcome. */ #define R61307_MACP 0xB0 /* Manufacturer CMD Protect */ #define R61307_INVERSION 0xC1 #define R61307_GAMMA_SET_A 0xC8 /* Gamma Setting A */ #define R61307_GAMMA_SET_B 0xC9 /* Gamma Setting B */ #define R61307_GAMMA_SET_C 0xCA /* Gamma Setting C */ #define R61307_CONTRAST_SET 0xCC struct renesas_r61307_priv { struct udevice *vcc; struct udevice *iovcc; struct udevice *backlight; struct gpio_desc reset_gpio; bool dig_cont_adj; bool inversion; u32 gamma; }; static const u8 macp_on[] = { R61307_MACP, 0x03 }; static const u8 macp_off[] = { R61307_MACP, 0x04 }; static const u8 address_mode[] = { MIPI_DCS_SET_ADDRESS_MODE }; static const u8 contrast_setting[] = { R61307_CONTRAST_SET, 0xdc, 0xb4, 0xff }; static const u8 column_inversion[] = { R61307_INVERSION, 0x00, 0x50, 0x03, 0x22, 0x16, 0x06, 0x60, 0x11 }; static const u8 line_inversion[] = { R61307_INVERSION, 0x00, 0x10, 0x03, 0x22, 0x16, 0x06, 0x60, 0x01 }; static const u8 gamma_setting[][25] = { {}, { R61307_GAMMA_SET_A, 0x00, 0x06, 0x0a, 0x0f, 0x14, 0x1f, 0x1f, 0x17, 0x12, 0x0c, 0x09, 0x06, 0x00, 0x06, 0x0a, 0x0f, 0x14, 0x1f, 0x1f, 0x17, 0x12, 0x0c, 0x09, 0x06 }, { R61307_GAMMA_SET_A, 0x00, 0x05, 0x0b, 0x0f, 0x11, 0x1d, 0x20, 0x18, 0x18, 0x09, 0x07, 0x06, 0x00, 0x05, 0x0b, 0x0f, 0x11, 0x1d, 0x20, 0x18, 0x18, 0x09, 0x07, 0x06 }, { R61307_GAMMA_SET_A, 0x0b, 0x0d, 0x10, 0x14, 0x13, 0x1d, 0x20, 0x18, 0x12, 0x09, 0x07, 0x06, 0x0a, 0x0c, 0x10, 0x14, 0x13, 0x1d, 0x20, 0x18, 0x12, 0x09, 0x07, 0x06 }, }; static struct display_timing default_timing = { .pixelclock.typ = 62000000, .hactive.typ = 768, .hfront_porch.typ = 116, .hback_porch.typ = 81, .hsync_len.typ = 5, .vactive.typ = 1024, .vfront_porch.typ = 24, .vback_porch.typ = 8, .vsync_len.typ = 2, }; static int renesas_r61307_enable_backlight(struct udevice *dev) { struct renesas_r61307_priv *priv = dev_get_priv(dev); int ret; ret = regulator_set_enable_if_allowed(priv->vcc, 1); if (ret) { log_err("enabling vcc-supply failed (%d)\n", ret); return ret; } mdelay(5); ret = regulator_set_enable_if_allowed(priv->iovcc, 1); if (ret) { log_err("enabling iovcc-supply failed (%d)\n", ret); return ret; } ret = dm_gpio_set_value(&priv->reset_gpio, 0); if (ret) { log_err("changing reset-gpio failed (%d)\n", ret); return ret; } mdelay(5); ret = dm_gpio_set_value(&priv->reset_gpio, 1); if (ret) { log_err("changing reset-gpio failed (%d)\n", ret); return ret; } mdelay(5); return 0; } static int renesas_r61307_set_backlight(struct udevice *dev, int percent) { struct renesas_r61307_priv *priv = dev_get_priv(dev); struct mipi_dsi_panel_plat *plat = dev_get_plat(dev); struct mipi_dsi_device *dsi = plat->device; int ret; ret = mipi_dsi_dcs_exit_sleep_mode(dsi); if (ret < 0) { log_err("failed to exit sleep mode: %d\n", ret); return ret; } mdelay(80); mipi_dsi_dcs_write_buffer(dsi, address_mode, sizeof(address_mode)); mdelay(20); ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT << 4); if (ret < 0) { log_err("failed to set pixel format: %d\n", ret); return ret; } /* MACP Off */ mipi_dsi_generic_write(dsi, macp_off, sizeof(macp_off)); if (priv->dig_cont_adj) mipi_dsi_generic_write(dsi, contrast_setting, sizeof(contrast_setting)); if (priv->gamma) mipi_dsi_generic_write(dsi, gamma_setting[priv->gamma], sizeof(gamma_setting[priv->gamma])); if (priv->inversion) mipi_dsi_generic_write(dsi, column_inversion, sizeof(column_inversion)); else mipi_dsi_generic_write(dsi, line_inversion, sizeof(line_inversion)); /* MACP On */ mipi_dsi_generic_write(dsi, macp_on, sizeof(macp_on)); ret = mipi_dsi_dcs_set_display_on(dsi); if (ret < 0) { log_err("failed to set display on: %d\n", ret); return ret; } mdelay(50); ret = backlight_enable(priv->backlight); if (ret) return ret; ret = backlight_set_brightness(priv->backlight, percent); if (ret) return ret; return 0; } static int renesas_r61307_timings(struct udevice *dev, struct display_timing *timing) { memcpy(timing, &default_timing, sizeof(*timing)); return 0; } static int renesas_r61307_of_to_plat(struct udevice *dev) { struct renesas_r61307_priv *priv = dev_get_priv(dev); int ret; ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev, "backlight", &priv->backlight); if (ret) { log_err("Cannot get backlight: ret = %d\n", ret); return ret; } ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev, "vcc-supply", &priv->vcc); if (ret) { log_err("Cannot get vcc-supply: ret = %d\n", ret); return ret; } ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev, "iovcc-supply", &priv->iovcc); if (ret) { log_err("Cannot get iovcc-supply: ret = %d\n", ret); return ret; } ret = gpio_request_by_name(dev, "reset-gpios", 0, &priv->reset_gpio, GPIOD_IS_OUT); if (ret) { log_err("Could not decode reser-gpios (%d)\n", ret); return ret; } priv->dig_cont_adj = dev_read_bool(dev, "renesas,contrast"); priv->inversion = dev_read_bool(dev, "renesas,inversion"); priv->gamma = dev_read_u32_default(dev, "renesas,gamma", 0); return 0; } static int renesas_r61307_probe(struct udevice *dev) { struct mipi_dsi_panel_plat *plat = dev_get_plat(dev); /* fill characteristics of DSI data link */ plat->lanes = 4; plat->format = MIPI_DSI_FMT_RGB888; plat->mode_flags = MIPI_DSI_MODE_VIDEO; return 0; } static const struct panel_ops renesas_r61307_ops = { .enable_backlight = renesas_r61307_enable_backlight, .set_backlight = renesas_r61307_set_backlight, .get_display_timing = renesas_r61307_timings, }; static const struct udevice_id renesas_r61307_ids[] = { { .compatible = "koe,tx13d100vm0eaa" }, { .compatible = "hitachi,tx13d100vm0eaa" }, { } }; U_BOOT_DRIVER(renesas_r61307) = { .name = "renesas_r61307", .id = UCLASS_PANEL, .of_match = renesas_r61307_ids, .ops = &renesas_r61307_ops, .of_to_plat = renesas_r61307_of_to_plat, .probe = renesas_r61307_probe, .plat_auto = sizeof(struct mipi_dsi_panel_plat), .priv_auto = sizeof(struct renesas_r61307_priv), };