[PATCH] video: add TDO tl070wsh30 panel driver
Neil Armstrong
narmstrong at baylibre.com
Fri Nov 6 11:29:47 CET 2020
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 at baylibre.com>
---
drivers/video/Kconfig | 9 ++
drivers/video/Makefile | 1 +
drivers/video/tdo-tl070wsh30.c | 155 +++++++++++++++++++++++++++++++++
3 files changed, 165 insertions(+)
create mode 100644 drivers/video/tdo-tl070wsh30.c
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 998271b9b6..9fef1a6d29 100644
--- 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 67a492a2d6..649901360f 100644
--- 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
index 0000000000..ae9d11f475
--- /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 at 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),
+};
--
2.25.1
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