--- /dev/null
+// 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),
+};
projects / u-boot.git / commitdiff