| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (C) 2022 Ondrej Jirman <megi@xff.cz> |
| */ |
| #include <common.h> |
| #include <backlight.h> |
| #include <dm.h> |
| #include <mipi_dsi.h> |
| #include <panel.h> |
| #include <asm/gpio.h> |
| #include <dm/device_compat.h> |
| #include <linux/delay.h> |
| #include <power/regulator.h> |
| |
| 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), |
| }; |
