video: hx8394: Add panel driver for hannstar,hsd060bhw4

The driver is for panels based on the Himax HX8394 controller, such as the
HannStar HSD060BHW4 720x1440 TFT LCD panel that uses a MIPI-DSI interface.
This panel is used in Pinephone Pro.

Signed-off-by: Ondrej Jirman <megi@xff.cz>
Cc: Anatolij Gustschin <agust@denx.de>

diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 4976295..b209cb7 100644 (file)
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -477,6 +477,14 @@ config VIDEO_LCD_ENDEAVORU
          using the same DSI command sequence. The panel has a 720x1280
          resolution and uses 24 bit RGB per pixel.
 
+config VIDEO_LCD_HIMAX_HX8394
+       bool "Himax HX8394 DSI LCD panel support"
+       depends on PANEL && BACKLIGHT
+       select VIDEO_MIPI_DSI
+       help
+       Say Y here if you want to enable support for Himax HX8394
+       dsi 4dl panel.
+
 config VIDEO_LCD_ORISETECH_OTM8009A
        bool "OTM8009A DSI LCD panel support"
        select VIDEO_MIPI_DSI

diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index f99d7e3..d710c1f 100644 (file)
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -54,6 +54,7 @@ obj-$(CONFIG_VIDEO_IPUV3) += imx/
 obj-$(CONFIG_VIDEO_IVYBRIDGE_IGD) += ivybridge_igd.o
 obj-$(CONFIG_VIDEO_LCD_ANX9804) += anx9804.o
 obj-$(CONFIG_VIDEO_LCD_ENDEAVORU) += endeavoru-panel.o
+obj-$(CONFIG_VIDEO_LCD_HIMAX_HX8394) += himax-hx8394.o
 obj-$(CONFIG_VIDEO_LCD_HITACHI_TX18D42VM) += hitachi_tx18d42vm_lcd.o
 obj-$(CONFIG_VIDEO_LCD_ORISETECH_OTM8009A) += orisetech_otm8009a.o
 obj-$(CONFIG_VIDEO_LCD_RAYDIUM_RM68200) += raydium-rm68200.o

diff --git a/drivers/video/himax-hx8394.c b/drivers/video/himax-hx8394.c
new file mode 100644 (file)
index 0000000..63637b4
--- /dev/null
+++ b/drivers/video/himax-hx8394.c
@@ -0,0 +1,237 @@
+// 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),
+};