// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2022 Ondrej Jirman */ #include #include #include #include #include #include #include #include #include struct hx8394_panel_priv { struct udevice *reg_vcc; struct udevice *reg_iovcc; struct gpio_desc reset; struct udevice *backlight; }; static const struct display_timing default_timing = { .pixelclock.typ = 74250000, .hactive.typ = 720, .hfront_porch.typ = 40, .hback_porch.typ = 40, .hsync_len.typ = 46, .vactive.typ = 1440, .vfront_porch.typ = 7, .vback_porch.typ = 9, .vsync_len.typ = 7, .flags = DISPLAY_FLAGS_VSYNC_LOW | DISPLAY_FLAGS_HSYNC_LOW, }; #define dsi_dcs_write_seq(device, seq...) do { \ static const u8 d[] = { seq }; \ int ret; \ ret = mipi_dsi_dcs_write_buffer(device, d, ARRAY_SIZE(d)); \ if (ret < 0) \ return ret; \ } while (0) static int hx8394_init_sequence(struct udevice *dev) { struct mipi_dsi_panel_plat *plat = dev_get_plat(dev); struct mipi_dsi_device *device = plat->device; int ret; dsi_dcs_write_seq(device, 0xb9, 0xff, 0x83, 0x94); dsi_dcs_write_seq(device, 0xb1, 0x48, 0x11, 0x71, 0x09, 0x32, 0x24, 0x71, 0x31, 0x55, 0x30); dsi_dcs_write_seq(device, 0xba, 0x63, 0x03, 0x68, 0x6b, 0xb2, 0xc0); dsi_dcs_write_seq(device, 0xb2, 0x00, 0x80, 0x78, 0x0c, 0x07); dsi_dcs_write_seq(device, 0xb4, 0x12, 0x63, 0x12, 0x63, 0x12, 0x63, 0x01, 0x0c, 0x7c, 0x55, 0x00, 0x3f, 0x12, 0x6b, 0x12, 0x6b, 0x12, 0x6b, 0x01, 0x0c, 0x7c); dsi_dcs_write_seq(device, 0xd3, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x1c, 0x00, 0x00, 0x32, 0x10, 0x09, 0x00, 0x09, 0x32, 0x15, 0xad, 0x05, 0xad, 0x32, 0x00, 0x00, 0x00, 0x00, 0x37, 0x03, 0x0b, 0x0b, 0x37, 0x00, 0x00, 0x00, 0x0c, 0x40); dsi_dcs_write_seq(device, 0xd5, 0x19, 0x19, 0x18, 0x18, 0x1b, 0x1b, 0x1a, 0x1a, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x20, 0x21, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x24, 0x25, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18); dsi_dcs_write_seq(device, 0xd6, 0x18, 0x18, 0x19, 0x19, 0x1b, 0x1b, 0x1a, 0x1a, 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00, 0x25, 0x24, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x21, 0x20, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18); dsi_dcs_write_seq(device, 0xe0, 0x00, 0x04, 0x0c, 0x12, 0x14, 0x18, 0x1a, 0x18, 0x31, 0x3f, 0x4d, 0x4c, 0x54, 0x65, 0x6b, 0x70, 0x7f, 0x82, 0x7e, 0x8a, 0x99, 0x4a, 0x48, 0x49, 0x4b, 0x4a, 0x4c, 0x4b, 0x7f, 0x00, 0x04, 0x0c, 0x11, 0x13, 0x17, 0x1a, 0x18, 0x31, 0x3f, 0x4d, 0x4c, 0x54, 0x65, 0x6b, 0x70, 0x7f, 0x82, 0x7e, 0x8a, 0x99, 0x4a, 0x48, 0x49, 0x4b, 0x4a, 0x4c, 0x4b, 0x7f); dsi_dcs_write_seq(device, 0xcc, 0x0b); dsi_dcs_write_seq(device, 0xc0, 0x1f, 0x31); dsi_dcs_write_seq(device, 0xb6, 0x7d, 0x7d); dsi_dcs_write_seq(device, 0xd4, 0x02); dsi_dcs_write_seq(device, 0xbd, 0x01); dsi_dcs_write_seq(device, 0xb1, 0x00); dsi_dcs_write_seq(device, 0xbd, 0x00); dsi_dcs_write_seq(device, 0xc6, 0xed); ret = mipi_dsi_dcs_exit_sleep_mode(device); if (ret) return ret; /* Panel is operational 120 msec after reset */ mdelay(120); ret = mipi_dsi_dcs_set_display_on(device); if (ret) return ret; return 0; } static int hx8394_panel_enable_backlight(struct udevice *dev) { struct mipi_dsi_panel_plat *plat = dev_get_plat(dev); struct mipi_dsi_device *device = plat->device; struct hx8394_panel_priv *priv = dev_get_priv(dev); int ret; ret = mipi_dsi_attach(device); if (ret < 0) { printf("mipi_dsi_attach failed %d\n", ret); return ret; } ret = hx8394_init_sequence(dev); if (ret) { printf("hx8394_init_sequence failed %d\n", ret); return ret; } if (priv->backlight) { ret = backlight_enable(priv->backlight); if (ret) { printf("backlight enabled failed %d\n", ret); return ret; } backlight_set_brightness(priv->backlight, 60); } mdelay(10); return 0; } static int hx8394_panel_get_display_timing(struct udevice *dev, struct display_timing *timings) { memcpy(timings, &default_timing, sizeof(*timings)); return 0; } static int hx8394_panel_of_to_plat(struct udevice *dev) { struct hx8394_panel_priv *priv = dev_get_priv(dev); int ret; if (CONFIG_IS_ENABLED(DM_REGULATOR)) { ret = device_get_supply_regulator(dev, "vcc-supply", &priv->reg_vcc); if (ret && ret != -ENOENT) { dev_err(dev, "Warning: cannot get vcc supply\n"); return ret; } ret = device_get_supply_regulator(dev, "iovcc-supply", &priv->reg_iovcc); if (ret && ret != -ENOENT) { dev_err(dev, "Warning: cannot get iovcc supply\n"); return ret; } } ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev, "backlight", &priv->backlight); if (ret) dev_warn(dev, "failed to get backlight\n"); ret = gpio_request_by_name(dev, "reset-gpios", 0, &priv->reset, GPIOD_IS_OUT); if (ret) { dev_err(dev, "warning: cannot get reset GPIO (%d)\n", ret); if (ret != -ENOENT) return ret; } return 0; } static int hx8394_panel_probe(struct udevice *dev) { struct hx8394_panel_priv *priv = dev_get_priv(dev); struct mipi_dsi_panel_plat *plat = dev_get_plat(dev); int ret; dm_gpio_set_value(&priv->reset, true); if (CONFIG_IS_ENABLED(DM_REGULATOR)) { dev_dbg(dev, "enable vcc '%s'\n", priv->reg_vcc->name); ret = regulator_set_enable(priv->reg_vcc, true); if (ret) return ret; dev_dbg(dev, "enable iovcc '%s'\n", priv->reg_iovcc->name); ret = regulator_set_enable(priv->reg_iovcc, true); if (ret) { regulator_set_enable(priv->reg_vcc, false); return ret; } } mdelay(5); dm_gpio_set_value(&priv->reset, false); mdelay(180); /* fill characteristics of DSI data link */ plat->lanes = 4; plat->format = MIPI_DSI_FMT_RGB888; plat->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST; return 0; } static const struct panel_ops hx8394_panel_ops = { .enable_backlight = hx8394_panel_enable_backlight, .get_display_timing = hx8394_panel_get_display_timing, }; static const struct udevice_id hx8394_panel_ids[] = { { .compatible = "hannstar,hsd060bhw4" }, { } }; U_BOOT_DRIVER(hx8394_panel) = { .name = "hx8394_panel", .id = UCLASS_PANEL, .of_match = hx8394_panel_ids, .ops = &hx8394_panel_ops, .of_to_plat = hx8394_panel_of_to_plat, .probe = hx8394_panel_probe, .plat_auto = sizeof(struct mipi_dsi_panel_plat), .priv_auto = sizeof(struct hx8394_panel_priv), };