mirror of
https://github.com/AsahiLinux/u-boot
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155 lines
3.5 KiB
C
155 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2020 BayLibre, SAS
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* Author: Neil Armstrong <narmstrong@baylibre.com>
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*/
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#include <common.h>
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#include <backlight.h>
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#include <dm.h>
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#include <mipi_dsi.h>
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#include <panel.h>
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#include <asm/gpio.h>
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#include <dm/device_compat.h>
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#include <linux/delay.h>
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#include <power/regulator.h>
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struct tl070wsh30_panel_priv {
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struct udevice *reg;
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struct udevice *backlight;
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struct gpio_desc reset;
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};
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static const struct display_timing default_timing = {
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.pixelclock.typ = 47250000,
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.hactive.typ = 1024,
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.hfront_porch.typ = 46,
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.hback_porch.typ = 100,
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.hsync_len.typ = 80,
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.vactive.typ = 600,
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.vfront_porch.typ = 5,
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.vback_porch.typ = 20,
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.vsync_len.typ = 5,
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.flags = DISPLAY_FLAGS_HSYNC_HIGH | DISPLAY_FLAGS_VSYNC_HIGH,
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};
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static int tl070wsh30_panel_enable_backlight(struct udevice *dev)
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{
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struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
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struct mipi_dsi_device *device = plat->device;
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struct tl070wsh30_panel_priv *priv = dev_get_priv(dev);
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int ret;
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ret = mipi_dsi_attach(device);
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if (ret < 0)
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return ret;
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ret = mipi_dsi_dcs_exit_sleep_mode(device);
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if (ret)
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return ret;
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mdelay(200);
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ret = mipi_dsi_dcs_set_display_on(device);
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if (ret)
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return ret;
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mdelay(20);
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ret = backlight_enable(priv->backlight);
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if (ret)
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return ret;
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return 0;
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}
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static int tl070wsh30_panel_get_display_timing(struct udevice *dev,
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struct display_timing *timings)
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{
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memcpy(timings, &default_timing, sizeof(*timings));
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return 0;
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}
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static int tl070wsh30_panel_of_to_plat(struct udevice *dev)
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{
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struct tl070wsh30_panel_priv *priv = dev_get_priv(dev);
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int ret;
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if (IS_ENABLED(CONFIG_DM_REGULATOR)) {
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ret = device_get_supply_regulator(dev, "power-supply",
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&priv->reg);
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if (ret && ret != -ENOENT) {
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dev_err(dev, "Warning: cannot get power supply\n");
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return ret;
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}
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}
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ret = gpio_request_by_name(dev, "reset-gpios", 0, &priv->reset,
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GPIOD_IS_OUT);
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if (ret) {
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dev_err(dev, "Warning: cannot get reset GPIO\n");
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if (ret != -ENOENT)
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return ret;
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}
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ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
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"backlight", &priv->backlight);
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if (ret) {
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dev_err(dev, "Cannot get backlight: ret=%d\n", ret);
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return ret;
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}
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return 0;
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}
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static int tl070wsh30_panel_probe(struct udevice *dev)
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{
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struct tl070wsh30_panel_priv *priv = dev_get_priv(dev);
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struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
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int ret;
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if (IS_ENABLED(CONFIG_DM_REGULATOR) && priv->reg) {
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ret = regulator_set_enable(priv->reg, true);
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if (ret)
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return ret;
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}
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mdelay(10);
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/* reset panel */
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dm_gpio_set_value(&priv->reset, true);
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mdelay(10);
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dm_gpio_set_value(&priv->reset, false);
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/* fill characteristics of DSI data link */
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plat->lanes = 4;
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plat->format = MIPI_DSI_FMT_RGB888;
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plat->mode_flags = MIPI_DSI_MODE_VIDEO |
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MIPI_DSI_MODE_VIDEO_BURST |
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MIPI_DSI_MODE_LPM;
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return 0;
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}
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static const struct panel_ops tl070wsh30_panel_ops = {
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.enable_backlight = tl070wsh30_panel_enable_backlight,
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.get_display_timing = tl070wsh30_panel_get_display_timing,
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};
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static const struct udevice_id tl070wsh30_panel_ids[] = {
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{ .compatible = "tdo,tl070wsh30" },
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{ }
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};
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U_BOOT_DRIVER(tl070wsh30_panel) = {
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.name = "tl070wsh30_panel",
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.id = UCLASS_PANEL,
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.of_match = tl070wsh30_panel_ids,
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.ops = &tl070wsh30_panel_ops,
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.of_to_plat = tl070wsh30_panel_of_to_plat,
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.probe = tl070wsh30_panel_probe,
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.plat_auto = sizeof(struct mipi_dsi_panel_plat),
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.priv_auto = sizeof(struct tl070wsh30_panel_priv),
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};
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