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// SPDX-License-Identifier: GPL-2.0+
/*
* Motorola ATRIX 4G and DROID X2 DSI panel driver
* Exact manufacturer and model unknown
*
* Copyright (c) 2025 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 mot_panel_priv {
struct udevice *vdd;
struct udevice *vddio;
struct udevice *backlight;
struct gpio_desc reset_gpio;
};
#define dsi_generic_write_seq(dsi, cmd, seq...) do { \
static const u8 b[] = { cmd, seq }; \
int ret; \
ret = mipi_dsi_dcs_write_buffer(dsi, b, ARRAY_SIZE(b)); \
if (ret < 0) \
return ret; \
} while (0)
static struct display_timing default_timing = {
.pixelclock.typ = 38250000,
.hactive.typ = 540,
.hfront_porch.typ = 32,
.hback_porch.typ = 32,
.hsync_len.typ = 16,
.vactive.typ = 960,
.vfront_porch.typ = 12,
.vback_porch.typ = 12,
.vsync_len.typ = 8,
};
static int mot_es2(struct mipi_dsi_device *dsi)
{
int ret;
dsi_generic_write_seq(dsi, 0x55, 0x01);
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0) {
log_debug("%s: failed to exit sleep mode: %d\n", __func__, ret);
return ret;
}
mdelay(120);
dsi_generic_write_seq(dsi, 0xf4, 0x00, 0xbb, 0x46, 0x53, 0x0c, 0x49,
0x74, 0x29, 0x12, 0x15, 0x2f, 0x2f, 0x04);
dsi_generic_write_seq(dsi, 0xf8, 0x4b, 0x04, 0x10, 0x1a, 0x2c, 0x2c,
0x2c, 0x2c, 0x14, 0x12);
dsi_generic_write_seq(dsi, 0xb5, 0x03, 0x7f, 0x00, 0x80, 0xc7, 0x00);
dsi_generic_write_seq(dsi, 0xb7, 0x66, 0xf6, 0x46, 0x9f, 0x90, 0x99,
0xff, 0x80, 0x6d, 0x01);
/* Gamma R */
dsi_generic_write_seq(dsi, 0xf9, 0x04);
dsi_generic_write_seq(dsi, 0xfa, 0x00, 0x2f, 0x30, 0x12, 0x0e, 0x0c,
0x22, 0x27, 0x31, 0x2e, 0x07, 0x0f);
dsi_generic_write_seq(dsi, 0xfb, 0x00, 0x2f, 0x30, 0x12, 0x0e, 0x0c,
0x22, 0x27, 0x31, 0x2e, 0x07, 0x0f);
/* Gamma G */
dsi_generic_write_seq(dsi, 0xf9, 0x02);
dsi_generic_write_seq(dsi, 0xfa, 0x00, 0x2f, 0x37, 0x15, 0x15, 0x11,
0x1f, 0x25, 0x2d, 0x2a, 0x05, 0x0f);
dsi_generic_write_seq(dsi, 0xfb, 0x00, 0x2f, 0x37, 0x15, 0x15, 0x11,
0x1f, 0x25, 0x2d, 0x2a, 0x05, 0x0f);
/* Gamma B */
dsi_generic_write_seq(dsi, 0xf9, 0x01);
dsi_generic_write_seq(dsi, 0xfa, 0x00, 0x2f, 0x3f, 0x16, 0x1f, 0x15,
0x1f, 0x25, 0x2d, 0x2b, 0x06, 0x0b);
dsi_generic_write_seq(dsi, 0xfb, 0x00, 0x2f, 0x3f, 0x16, 0x1f, 0x15,
0x1f, 0x25, 0x2d, 0x2b, 0x06, 0x0b);
/* Gamma W */
dsi_generic_write_seq(dsi, 0xf9, 0x20);
dsi_generic_write_seq(dsi, 0xfa, 0x00, 0x2f, 0x34, 0x15, 0x1a, 0x11,
0x1f, 0x23, 0x2d, 0x29, 0x02, 0x08);
dsi_generic_write_seq(dsi, 0xfb, 0x00, 0x2f, 0x34, 0x15, 0x1a, 0x11,
0x1f, 0x23, 0x2d, 0x29, 0x02, 0x08);
dsi_generic_write_seq(dsi, 0x53, 0x2c);
dsi_generic_write_seq(dsi, 0x35, 0x00);
return 0;
}
static int __maybe_unused mot_es4(struct mipi_dsi_device *dsi)
{
int ret;
dsi_generic_write_seq(dsi, 0xd2, 0x04, 0x53);
dsi_generic_write_seq(dsi, 0xd2, 0x05, 0x53);
dsi_generic_write_seq(dsi, 0x55, 0x01);
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0) {
log_debug("%s: failed to exit sleep mode: %d\n", __func__, ret);
return ret;
}
mdelay(120);
dsi_generic_write_seq(dsi, 0xb5, 0x03, 0x7f, 0x0a, 0x80, 0xff, 0x00);
dsi_generic_write_seq(dsi, 0xb7, 0x7a, 0xf7, 0x4d, 0x91, 0x90, 0xb3,
0xff, 0x80, 0x6d, 0x01);
dsi_generic_write_seq(dsi, 0xf4, 0x00, 0xbb, 0x46, 0x53, 0x0c, 0x49,
0x74, 0x29, 0x12, 0x15, 0x37, 0x37, 0x04);
dsi_generic_write_seq(dsi, 0xf8, 0x0a, 0x04, 0x10, 0x2a, 0x35, 0x35,
0x35, 0x35, 0x21, 0x1a);
/* Gamma R */
dsi_generic_write_seq(dsi, 0xf9, 0x04);
dsi_generic_write_seq(dsi, 0xfa, 0x08, 0x1c, 0x1b, 0x0f, 0x0f, 0x0a,
0x1e, 0x22, 0x27, 0x26, 0x07, 0x0d);
dsi_generic_write_seq(dsi, 0xfb, 0x08, 0x3c, 0x27, 0x0f, 0x0f, 0x0a,
0x1e, 0x26, 0x31, 0x2f, 0x07, 0x0b);
/* Gamma G */
dsi_generic_write_seq(dsi, 0xf9, 0x02);
dsi_generic_write_seq(dsi, 0xfa, 0x30, 0x14, 0x0f, 0x00, 0x06, 0x02,
0x1e, 0x22, 0x27, 0x27, 0x08, 0x10);
dsi_generic_write_seq(dsi, 0xfb, 0x30, 0x35, 0x0f, 0x00, 0x0a, 0x02,
0x1c, 0x23, 0x31, 0x2f, 0x08, 0x0e);
/* Gamma B */
dsi_generic_write_seq(dsi, 0xf9, 0x01);
dsi_generic_write_seq(dsi, 0xfa, 0x12, 0x1b, 0x26, 0x0e, 0x12, 0x0b,
0x1e, 0x22, 0x27, 0x27, 0x06, 0x0c);
dsi_generic_write_seq(dsi, 0xfb, 0x12, 0x3b, 0x2c, 0x12, 0x12, 0x0e,
0x1e, 0x26, 0x31, 0x2f, 0x06, 0x0d);
/* Gamma W */
dsi_generic_write_seq(dsi, 0xf9, 0x20);
dsi_generic_write_seq(dsi, 0xfa, 0x37, 0x1b, 0x09, 0x01, 0x06, 0x04,
0x19, 0x19, 0x22, 0x24, 0x04, 0x15);
dsi_generic_write_seq(dsi, 0xfb, 0x37, 0x3b, 0x17, 0x01, 0x0a, 0x04,
0x19, 0x1d, 0x2c, 0x2c, 0x04, 0x13);
dsi_generic_write_seq(dsi, 0x53, 0x2c);
dsi_generic_write_seq(dsi, 0x35, 0x00);
dsi_generic_write_seq(dsi, 0xc3, 0x01, 0x4e);
return 0;
}
static int mot_panel_enable_backlight(struct udevice *dev)
{
struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
struct mipi_dsi_device *dsi = plat->device;
int ret;
dsi_generic_write_seq(dsi, 0xf0, 0x5a, 0x5a);
dsi_generic_write_seq(dsi, 0xf1, 0x5a, 0x5a);
dsi_generic_write_seq(dsi, 0xd0, 0x8e);
ret = mot_es2(dsi);
if (ret)
return ret;
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret < 0) {
log_debug("%s: failed to set display on: %d\n", __func__, ret);
return ret;
}
mdelay(20);
return 0;
}
static int mot_panel_set_backlight(struct udevice *dev, int percent)
{
struct mot_panel_priv *priv = dev_get_priv(dev);
int ret;
ret = backlight_enable(priv->backlight);
if (ret)
return ret;
mdelay(5);
return backlight_set_brightness(priv->backlight, percent);
}
static int mot_panel_timings(struct udevice *dev, struct display_timing *timing)
{
memcpy(timing, &default_timing, sizeof(*timing));
return 0;
}
static int mot_panel_of_to_plat(struct udevice *dev)
{
struct mot_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_debug("%s: cannot get backlight: ret = %d\n", __func__, ret);
return ret;
}
ret = device_get_supply_regulator(dev, "vdd-supply", &priv->vdd);
if (ret) {
log_debug("%s: cannot get vdd-supply: ret = %d\n", __func__, ret);
return ret;
}
ret = device_get_supply_regulator(dev, "vddio-supply", &priv->vddio);
if (ret) {
log_debug("%s: cannot get vddio-supply: ret = %d\n", __func__, ret);
return ret;
}
ret = gpio_request_by_name(dev, "reset-gpios", 0,
&priv->reset_gpio, GPIOD_IS_OUT);
if (ret) {
log_debug("%s: could not decode reser-gpios (%d)\n", __func__, ret);
return ret;
}
return 0;
}
static int mot_panel_hw_init(struct udevice *dev)
{
struct mot_panel_priv *priv = dev_get_priv(dev);
int ret;
ret = regulator_set_enable_if_allowed(priv->vddio, 1);
if (ret) {
log_debug("%s: enabling vddio-supply failed (%d)\n", __func__, ret);
return ret;
}
ret = regulator_set_enable_if_allowed(priv->vdd, 1);
if (ret) {
log_debug("%s: enabling vdd-supply failed (%d)\n", __func__, ret);
return ret;
}
ret = dm_gpio_set_value(&priv->reset_gpio, 1);
if (ret) {
log_debug("%s: error entering reset (%d)\n", __func__, ret);
return ret;
}
mdelay(50);
ret = dm_gpio_set_value(&priv->reset_gpio, 0);
if (ret) {
log_debug("%s: error exiting reset (%d)\n", __func__, ret);
return ret;
}
mdelay(10);
return 0;
}
static int mot_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_LPM;
return mot_panel_hw_init(dev);
}
static const struct panel_ops mot_panel_ops = {
.enable_backlight = mot_panel_enable_backlight,
.set_backlight = mot_panel_set_backlight,
.get_display_timing = mot_panel_timings,
};
static const struct udevice_id mot_panel_ids[] = {
{ .compatible = "motorola,mot-panel" },
{ }
};
U_BOOT_DRIVER(mot_panel) = {
.name = "mot_panel",
.id = UCLASS_PANEL,
.of_match = mot_panel_ids,
.ops = &mot_panel_ops,
.of_to_plat = mot_panel_of_to_plat,
.probe = mot_panel_probe,
.plat_auto = sizeof(struct mipi_dsi_panel_plat),
.priv_auto = sizeof(struct mot_panel_priv),
};
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