video: add TDO tl070wsh30 panel driver

This adds support for the TDO TL070WSH30 TFT-LCD panel module.
The panel has a 1024×600 resolution and uses 24 bit RGB per pixel.
It provides a MIPI DSI interface to the host, a built-in LED backlight
and touch controller.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 998271b9b628ce6fcd8123b72ba96fd1f89975a0..9fef1a6d291ad5f13174ca0df3d200fe89416c4e 100644 (file)
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -449,6 +449,15 @@ config VIDEO_LCD_SSD2828_RESET
        The reset pin of SSD2828 chip. This takes a string in the format
        understood by 'name_to_gpio' function, e.g. PH1 for pin 1 of port H.
 
+config VIDEO_LCD_TDO_TL070WSH30
+       bool "TDO TL070WSH30 DSI LCD panel support"
+       depends on DM_VIDEO
+       select VIDEO_MIPI_DSI
+       default n
+       help
+       Say Y here if you want to enable support for TDO TL070WSH30
+       1024x600 DSI video mode panel.
+
 config VIDEO_LCD_HITACHI_TX18D42VM
        bool "Hitachi tx18d42vm LVDS LCD panel support"
        depends on VIDEO

diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index 67a492a2d60d6957a4ee9c9ab6919d16c8e51674..649901360fc3daf1701093b293ceb943c88a3633 100644 (file)
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -56,6 +56,7 @@ obj-$(CONFIG_VIDEO_LCD_HITACHI_TX18D42VM) += hitachi_tx18d42vm_lcd.o
 obj-$(CONFIG_VIDEO_LCD_ORISETECH_OTM8009A) += orisetech_otm8009a.o
 obj-$(CONFIG_VIDEO_LCD_RAYDIUM_RM68200) += raydium-rm68200.o
 obj-$(CONFIG_VIDEO_LCD_SSD2828) += ssd2828.o
+obj-$(CONFIG_VIDEO_LCD_TDO_TL070WSH30) += tdo-tl070wsh30.o
 obj-$(CONFIG_VIDEO_MB862xx) += mb862xx.o videomodes.o
 obj-${CONFIG_VIDEO_MESON} += meson/
 obj-${CONFIG_VIDEO_MIPI_DSI} += mipi_dsi.o

diff --git a/drivers/video/tdo-tl070wsh30.c b/drivers/video/tdo-tl070wsh30.c
new file mode 100644 (file)
index 0000000..ae9d11f
--- /dev/null
+++ b/drivers/video/tdo-tl070wsh30.c
@@ -0,0 +1,155 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ */
+#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 tl070wsh30_panel_priv {
+       struct udevice *reg;
+       struct udevice *backlight;
+       struct gpio_desc reset;
+};
+
+static const struct display_timing default_timing = {
+       .pixelclock.typ         = 47250000,
+       .hactive.typ            = 1024,
+       .hfront_porch.typ       = 46,
+       .hback_porch.typ        = 100,
+       .hsync_len.typ          = 80,
+       .vactive.typ            = 600,
+       .vfront_porch.typ       = 5,
+       .vback_porch.typ        = 20,
+       .vsync_len.typ          = 5,
+       .flags                  = DISPLAY_FLAGS_HSYNC_HIGH | DISPLAY_FLAGS_VSYNC_HIGH,
+};
+
+static int tl070wsh30_panel_enable_backlight(struct udevice *dev)
+{
+       struct mipi_dsi_panel_plat *plat = dev_get_platdata(dev);
+       struct mipi_dsi_device *device = plat->device;
+       struct tl070wsh30_panel_priv *priv = dev_get_priv(dev);
+       int ret;
+
+       ret = mipi_dsi_attach(device);
+       if (ret < 0)
+               return ret;
+
+       ret = mipi_dsi_dcs_exit_sleep_mode(device);
+       if (ret)
+               return ret;
+
+       mdelay(200);
+
+       ret = mipi_dsi_dcs_set_display_on(device);
+       if (ret)
+               return ret;
+
+       mdelay(20);
+
+       ret = backlight_enable(priv->backlight);
+       if (ret)
+               return ret;
+
+       return 0;
+}
+
+static int tl070wsh30_panel_get_display_timing(struct udevice *dev,
+                                           struct display_timing *timings)
+{
+       memcpy(timings, &default_timing, sizeof(*timings));
+
+       return 0;
+}
+
+static int tl070wsh30_panel_ofdata_to_platdata(struct udevice *dev)
+{
+       struct tl070wsh30_panel_priv *priv = dev_get_priv(dev);
+       int ret;
+
+       if (IS_ENABLED(CONFIG_DM_REGULATOR)) {
+               ret =  device_get_supply_regulator(dev, "power-supply",
+                                                  &priv->reg);
+               if (ret && ret != -ENOENT) {
+                       dev_err(dev, "Warning: cannot get power supply\n");
+                       return ret;
+               }
+       }
+
+       ret = gpio_request_by_name(dev, "reset-gpios", 0, &priv->reset,
+                                  GPIOD_IS_OUT);
+       if (ret) {
+               dev_err(dev, "Warning: cannot get reset GPIO\n");
+               if (ret != -ENOENT)
+                       return ret;
+       }
+
+       ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
+                                          "backlight", &priv->backlight);
+       if (ret) {
+               dev_err(dev, "Cannot get backlight: ret=%d\n", ret);
+               return ret;
+       }
+
+       return 0;
+}
+
+static int tl070wsh30_panel_probe(struct udevice *dev)
+{
+       struct tl070wsh30_panel_priv *priv = dev_get_priv(dev);
+       struct mipi_dsi_panel_plat *plat = dev_get_platdata(dev);
+       int ret;
+
+       if (IS_ENABLED(CONFIG_DM_REGULATOR) && priv->reg) {
+               ret = regulator_set_enable(priv->reg, true);
+               if (ret)
+                       return ret;
+       }
+
+       mdelay(10);
+
+       /* reset panel */
+       dm_gpio_set_value(&priv->reset, true);
+       
+       mdelay(10);
+
+       dm_gpio_set_value(&priv->reset, false);
+
+       /* 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 |
+                          MIPI_DSI_MODE_LPM;
+
+       return 0;
+}
+
+static const struct panel_ops tl070wsh30_panel_ops = {
+       .enable_backlight = tl070wsh30_panel_enable_backlight,
+       .get_display_timing = tl070wsh30_panel_get_display_timing,
+};
+
+static const struct udevice_id tl070wsh30_panel_ids[] = {
+       { .compatible = "tdo,tl070wsh30" },
+       { }
+};
+
+U_BOOT_DRIVER(tl070wsh30_panel) = {
+       .name                     = "tl070wsh30_panel",
+       .id                       = UCLASS_PANEL,
+       .of_match                 = tl070wsh30_panel_ids,
+       .ops                      = &tl070wsh30_panel_ops,
+       .ofdata_to_platdata       = tl070wsh30_panel_ofdata_to_platdata,
+       .probe                    = tl070wsh30_panel_probe,
+       .platdata_auto_alloc_size = sizeof(struct mipi_dsi_panel_plat),
+       .priv_auto_alloc_size   = sizeof(struct tl070wsh30_panel_priv),
+};