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// SPDX-License-Identifier: GPL-2.0+
/*
* Renesas R61307 panel driver
*
* Copyright (c) 2022 Svyatoslav Ryhel <clamor95@gmail.com>
*/
#include <common.h>
#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>
/*
* The datasheet is not publicly available, all values are
* taken from the downstream. If you have access to datasheets,
* corrections are welcome.
*/
#define R61307_MACP 0xB0 /* Manufacturer CMD Protect */
#define R61307_INVERSION 0xC1
#define R61307_GAMMA_SET_A 0xC8 /* Gamma Setting A */
#define R61307_GAMMA_SET_B 0xC9 /* Gamma Setting B */
#define R61307_GAMMA_SET_C 0xCA /* Gamma Setting C */
#define R61307_CONTRAST_SET 0xCC
struct renesas_r61307_priv {
struct udevice *vcc;
struct udevice *iovcc;
struct udevice *backlight;
struct gpio_desc reset_gpio;
bool dig_cont_adj;
bool inversion;
u32 gamma;
};
static const u8 macp_on[] = {
R61307_MACP, 0x03
};
static const u8 macp_off[] = {
R61307_MACP, 0x04
};
static const u8 address_mode[] = {
MIPI_DCS_SET_ADDRESS_MODE
};
static const u8 contrast_setting[] = {
R61307_CONTRAST_SET,
0xdc, 0xb4, 0xff
};
static const u8 column_inversion[] = {
R61307_INVERSION,
0x00, 0x50, 0x03, 0x22,
0x16, 0x06, 0x60, 0x11
};
static const u8 line_inversion[] = {
R61307_INVERSION,
0x00, 0x10, 0x03, 0x22,
0x16, 0x06, 0x60, 0x01
};
static const u8 gamma_setting[][25] = {
{},
{
R61307_GAMMA_SET_A,
0x00, 0x06, 0x0a, 0x0f,
0x14, 0x1f, 0x1f, 0x17,
0x12, 0x0c, 0x09, 0x06,
0x00, 0x06, 0x0a, 0x0f,
0x14, 0x1f, 0x1f, 0x17,
0x12, 0x0c, 0x09, 0x06
},
{
R61307_GAMMA_SET_A,
0x00, 0x05, 0x0b, 0x0f,
0x11, 0x1d, 0x20, 0x18,
0x18, 0x09, 0x07, 0x06,
0x00, 0x05, 0x0b, 0x0f,
0x11, 0x1d, 0x20, 0x18,
0x18, 0x09, 0x07, 0x06
},
{
R61307_GAMMA_SET_A,
0x0b, 0x0d, 0x10, 0x14,
0x13, 0x1d, 0x20, 0x18,
0x12, 0x09, 0x07, 0x06,
0x0a, 0x0c, 0x10, 0x14,
0x13, 0x1d, 0x20, 0x18,
0x12, 0x09, 0x07, 0x06
},
};
static struct display_timing default_timing = {
.pixelclock.typ = 62000000,
.hactive.typ = 768,
.hfront_porch.typ = 116,
.hback_porch.typ = 81,
.hsync_len.typ = 5,
.vactive.typ = 1024,
.vfront_porch.typ = 24,
.vback_porch.typ = 8,
.vsync_len.typ = 2,
};
static int renesas_r61307_enable_backlight(struct udevice *dev)
{
struct renesas_r61307_priv *priv = dev_get_priv(dev);
int ret;
ret = regulator_set_enable_if_allowed(priv->vcc, 1);
if (ret) {
log_err("enabling vcc-supply failed (%d)\n", ret);
return ret;
}
mdelay(5);
ret = regulator_set_enable_if_allowed(priv->iovcc, 1);
if (ret) {
log_err("enabling iovcc-supply failed (%d)\n", ret);
return ret;
}
ret = dm_gpio_set_value(&priv->reset_gpio, 0);
if (ret) {
log_err("changing reset-gpio failed (%d)\n", ret);
return ret;
}
mdelay(5);
ret = dm_gpio_set_value(&priv->reset_gpio, 1);
if (ret) {
log_err("changing reset-gpio failed (%d)\n", ret);
return ret;
}
mdelay(5);
return 0;
}
static int renesas_r61307_set_backlight(struct udevice *dev, int percent)
{
struct renesas_r61307_priv *priv = dev_get_priv(dev);
struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
struct mipi_dsi_device *dsi = plat->device;
int ret;
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0) {
log_err("failed to exit sleep mode: %d\n", ret);
return ret;
}
mdelay(80);
mipi_dsi_dcs_write_buffer(dsi, address_mode,
sizeof(address_mode));
mdelay(20);
ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT << 4);
if (ret < 0) {
log_err("failed to set pixel format: %d\n", ret);
return ret;
}
/* MACP Off */
mipi_dsi_generic_write(dsi, macp_off, sizeof(macp_off));
if (priv->dig_cont_adj)
mipi_dsi_generic_write(dsi, contrast_setting,
sizeof(contrast_setting));
if (priv->gamma)
mipi_dsi_generic_write(dsi, gamma_setting[priv->gamma],
sizeof(gamma_setting[priv->gamma]));
if (priv->inversion)
mipi_dsi_generic_write(dsi, column_inversion,
sizeof(column_inversion));
else
mipi_dsi_generic_write(dsi, line_inversion,
sizeof(line_inversion));
/* MACP On */
mipi_dsi_generic_write(dsi, macp_on, sizeof(macp_on));
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret < 0) {
log_err("failed to set display on: %d\n", ret);
return ret;
}
mdelay(50);
ret = backlight_enable(priv->backlight);
if (ret)
return ret;
ret = backlight_set_brightness(priv->backlight, percent);
if (ret)
return ret;
return 0;
}
static int renesas_r61307_timings(struct udevice *dev,
struct display_timing *timing)
{
memcpy(timing, &default_timing, sizeof(*timing));
return 0;
}
static int renesas_r61307_of_to_plat(struct udevice *dev)
{
struct renesas_r61307_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,
"vcc-supply", &priv->vcc);
if (ret) {
log_err("Cannot get vcc-supply: ret = %d\n", ret);
return ret;
}
ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
"iovcc-supply", &priv->iovcc);
if (ret) {
log_err("Cannot get iovcc-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;
}
priv->dig_cont_adj = dev_read_bool(dev, "renesas,contrast");
priv->inversion = dev_read_bool(dev, "renesas,inversion");
priv->gamma = dev_read_u32_default(dev, "renesas,gamma", 0);
return 0;
}
static int renesas_r61307_probe(struct udevice *dev)
{
struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
/* fill characteristics of DSI data link */
plat->lanes = 4;
plat->format = MIPI_DSI_FMT_RGB888;
plat->mode_flags = MIPI_DSI_MODE_VIDEO;
return 0;
}
static const struct panel_ops renesas_r61307_ops = {
.enable_backlight = renesas_r61307_enable_backlight,
.set_backlight = renesas_r61307_set_backlight,
.get_display_timing = renesas_r61307_timings,
};
static const struct udevice_id renesas_r61307_ids[] = {
{ .compatible = "koe,tx13d100vm0eaa" },
{ .compatible = "hitachi,tx13d100vm0eaa" },
{ }
};
U_BOOT_DRIVER(renesas_r61307) = {
.name = "renesas_r61307",
.id = UCLASS_PANEL,
.of_match = renesas_r61307_ids,
.ops = &renesas_r61307_ops,
.of_to_plat = renesas_r61307_of_to_plat,
.probe = renesas_r61307_probe,
.plat_auto = sizeof(struct mipi_dsi_panel_plat),
.priv_auto = sizeof(struct renesas_r61307_priv),
};
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