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// 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_plat(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_of_to_plat(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_plat(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,
.of_to_plat = tl070wsh30_panel_of_to_plat,
.probe = tl070wsh30_panel_probe,
.plat_auto = sizeof(struct mipi_dsi_panel_plat),
.priv_auto = sizeof(struct tl070wsh30_panel_priv),
};
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