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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2022 Svyatoslav Ryhel <clamor95@gmail.com>
*/
#include <backlight.h>
#include <dm.h>
#include <panel.h>
#include <log.h>
#include <misc.h>
#include <mipi_display.h>
#include <mipi_dsi.h>
#include <asm/gpio.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <power/regulator.h>
struct endeavoru_panel_priv {
struct udevice *vdd;
struct udevice *vddio;
struct udevice *backlight;
struct gpio_desc reset_gpio;
};
static struct display_timing default_timing = {
.pixelclock.typ = 63200000,
.hactive.typ = 720,
.hfront_porch.typ = 55,
.hback_porch.typ = 29,
.hsync_len.typ = 16,
.vactive.typ = 1280,
.vfront_porch.typ = 2,
.vback_porch.typ = 1,
.vsync_len.typ = 1,
};
static void dcs_write_one(struct mipi_dsi_device *dsi, u8 cmd, u8 data)
{
mipi_dsi_dcs_write(dsi, cmd, &data, 1);
}
/*
* This panel is not able to auto-increment all cmd addresses so for some of
* them, we need to send them one by one...
*/
#define dcs_write_seq(dsi, cmd, seq...) \
({ \
static const u8 d[] = { seq }; \
unsigned int i; \
\
for (i = 0; i < ARRAY_SIZE(d) ; i++) \
dcs_write_one(dsi, cmd + i, d[i]); \
})
static int endeavoru_panel_enable_backlight(struct udevice *dev)
{
struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
struct mipi_dsi_device *dsi = plat->device;
dcs_write_one(dsi, 0xc2, 0x08);
/* color enhancement 2.2 */
dcs_write_one(dsi, 0xff, 0x03);
dcs_write_one(dsi, 0xfe, 0x08);
dcs_write_one(dsi, 0x18, 0x00);
dcs_write_one(dsi, 0x19, 0x00);
dcs_write_one(dsi, 0x1a, 0x00);
dcs_write_one(dsi, 0x25, 0x26);
dcs_write_seq(dsi, 0x00, 0x00, 0x05, 0x10, 0x17,
0x22, 0x26, 0x29, 0x29, 0x26, 0x23,
0x17, 0x12, 0x06, 0x02, 0x01, 0x00);
dcs_write_one(dsi, 0xfb, 0x01);
dcs_write_one(dsi, 0xff, 0x00);
dcs_write_one(dsi, 0xfe, 0x01);
mipi_dsi_dcs_exit_sleep_mode(dsi);
mdelay(105);
dcs_write_one(dsi, 0x35, 0x00);
/* PWM frequency adjust */
dcs_write_one(dsi, 0xff, 0x04);
dcs_write_one(dsi, 0x0a, 0x07);
dcs_write_one(dsi, 0x09, 0x20);
dcs_write_one(dsi, 0xff, 0x00);
dcs_write_one(dsi, 0xff, 0xee);
dcs_write_one(dsi, 0x12, 0x50);
dcs_write_one(dsi, 0x13, 0x02);
dcs_write_one(dsi, 0x6a, 0x60);
dcs_write_one(dsi, 0xfb, 0x01);
dcs_write_one(dsi, 0xff, 0x00);
mipi_dsi_dcs_set_display_on(dsi);
mdelay(42);
dcs_write_one(dsi, 0xba, 0x01);
dcs_write_one(dsi, 0x53, 0x24);
dcs_write_one(dsi, 0x55, 0x80);
dcs_write_one(dsi, 0x5e, 0x06);
/* Set backlight */
dcs_write_one(dsi, 0x51, 0x96);
return 0;
}
static int endeavoru_panel_set_backlight(struct udevice *dev, int percent)
{
struct endeavoru_panel_priv *priv = dev_get_priv(dev);
int ret;
ret = backlight_enable(priv->backlight);
if (ret)
return ret;
return backlight_set_brightness(priv->backlight, percent);
}
static int endeavoru_panel_timings(struct udevice *dev,
struct display_timing *timing)
{
memcpy(timing, &default_timing, sizeof(*timing));
return 0;
}
static int endeavoru_panel_of_to_plat(struct udevice *dev)
{
struct endeavoru_panel_priv *priv = dev_get_priv(dev);
int ret;
ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
"backlight", &priv->backlight);
if (ret) {
log_err("cannot get backlight: ret = %d\n", ret);
return ret;
}
ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
"vdd-supply", &priv->vdd);
if (ret) {
log_err("cannot get vdd-supply: ret = %d\n", ret);
return ret;
}
ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
"vddio-supply", &priv->vddio);
if (ret) {
log_err("cannot get vddio-supply: ret = %d\n", ret);
return ret;
}
ret = gpio_request_by_name(dev, "reset-gpios", 0,
&priv->reset_gpio, GPIOD_IS_OUT);
if (ret) {
log_err("could not decode reser-gpios (%d)\n", ret);
return ret;
}
return 0;
}
static int endeavoru_panel_hw_init(struct udevice *dev)
{
struct endeavoru_panel_priv *priv = dev_get_priv(dev);
int ret;
ret = dm_gpio_set_value(&priv->reset_gpio, 1);
if (ret) {
log_debug("%s: error changing reset-gpios (%d)\n",
__func__, ret);
return ret;
}
mdelay(5);
ret = regulator_set_enable_if_allowed(priv->vddio, 1);
if (ret) {
log_debug("%s: error enabling iovcc-supply (%d)\n",
__func__, ret);
return ret;
}
mdelay(1);
ret = regulator_set_enable_if_allowed(priv->vdd, 1);
if (ret) {
log_debug("%s: error enabling vcc-supply (%d)\n",
__func__, ret);
return ret;
}
mdelay(20);
ret = dm_gpio_set_value(&priv->reset_gpio, 0);
if (ret) {
log_debug("%s: error changing reset-gpios (%d)\n",
__func__, ret);
return ret;
}
mdelay(2);
/* Reset panel */
ret = dm_gpio_set_value(&priv->reset_gpio, 1);
if (ret) {
log_debug("%s: error changing reset-gpios (%d)\n",
__func__, ret);
return ret;
}
mdelay(1);
ret = dm_gpio_set_value(&priv->reset_gpio, 0);
if (ret) {
log_debug("%s: error changing reset-gpios (%d)\n",
__func__, ret);
return ret;
}
mdelay(25);
return 0;
}
static int endeavoru_panel_probe(struct udevice *dev)
{
struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
/* fill characteristics of DSI data link */
plat->lanes = 2;
plat->format = MIPI_DSI_FMT_RGB888;
plat->mode_flags = MIPI_DSI_MODE_VIDEO;
return endeavoru_panel_hw_init(dev);
}
static const struct panel_ops endeavoru_panel_ops = {
.enable_backlight = endeavoru_panel_enable_backlight,
.set_backlight = endeavoru_panel_set_backlight,
.get_display_timing = endeavoru_panel_timings,
};
static const struct udevice_id endeavoru_panel_ids[] = {
{ .compatible = "htc,edge-panel" },
{ }
};
U_BOOT_DRIVER(endeavoru_panel) = {
.name = "endeavoru_panel",
.id = UCLASS_PANEL,
.of_match = endeavoru_panel_ids,
.ops = &endeavoru_panel_ops,
.of_to_plat = endeavoru_panel_of_to_plat,
.probe = endeavoru_panel_probe,
.plat_auto = sizeof(struct mipi_dsi_panel_plat),
.priv_auto = sizeof(struct endeavoru_panel_priv),
};
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