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// SPDX-License-Identifier: GPL-2.0+
/*
* Renesas R69328 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 R69328_MACP 0xB0 /* Manufacturer Command Access Protect */
#define R69328_GAMMA_SET_A 0xC8 /* Gamma Setting A */
#define R69328_GAMMA_SET_B 0xC9 /* Gamma Setting B */
#define R69328_GAMMA_SET_C 0xCA /* Gamma Setting C */
#define R69328_POWER_SET 0xD1
struct renesas_r69328_priv {
struct udevice *backlight;
struct gpio_desc enable_gpio;
struct gpio_desc reset_gpio;
};
static const u8 address_mode[] = {
MIPI_DCS_SET_ADDRESS_MODE
};
#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 = 68000000,
.hactive.typ = 720,
.hfront_porch.typ = 92,
.hback_porch.typ = 62,
.hsync_len.typ = 4,
.vactive.typ = 1280,
.vfront_porch.typ = 6,
.vback_porch.typ = 3,
.vsync_len.typ = 1,
};
static int renesas_r69328_enable_backlight(struct udevice *dev)
{
struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
struct mipi_dsi_device *dsi = plat->device;
int ret;
mipi_dsi_dcs_write_buffer(dsi, address_mode,
sizeof(address_mode));
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;
}
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0) {
log_err("failed to exit sleep mode: %d\n", ret);
return ret;
}
mdelay(100);
/* MACP Off */
dsi_generic_write_seq(dsi, R69328_MACP, 0x04);
dsi_generic_write_seq(dsi, R69328_POWER_SET, 0x14,
0x1d, 0x21, 0x67, 0x11, 0x9a);
dsi_generic_write_seq(dsi, R69328_GAMMA_SET_A, 0x00,
0x1a, 0x20, 0x28, 0x25, 0x24,
0x26, 0x15, 0x13, 0x11, 0x18,
0x1e, 0x1c, 0x00, 0x00, 0x1a,
0x20, 0x28, 0x25, 0x24, 0x26,
0x15, 0x13, 0x11, 0x18, 0x1e,
0x1c, 0x00);
dsi_generic_write_seq(dsi, R69328_GAMMA_SET_B, 0x00,
0x1a, 0x20, 0x28, 0x25, 0x24,
0x26, 0x15, 0x13, 0x11, 0x18,
0x1e, 0x1c, 0x00, 0x00, 0x1a,
0x20, 0x28, 0x25, 0x24, 0x26,
0x15, 0x13, 0x11, 0x18, 0x1e,
0x1c, 0x00);
dsi_generic_write_seq(dsi, R69328_GAMMA_SET_C, 0x00,
0x1a, 0x20, 0x28, 0x25, 0x24,
0x26, 0x15, 0x13, 0x11, 0x18,
0x1e, 0x1c, 0x00, 0x00, 0x1a,
0x20, 0x28, 0x25, 0x24, 0x26,
0x15, 0x13, 0x11, 0x18, 0x1e,
0x1c, 0x00);
/* MACP On */
dsi_generic_write_seq(dsi, R69328_MACP, 0x03);
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);
return 0;
}
static int renesas_r69328_set_backlight(struct udevice *dev, int percent)
{
struct renesas_r69328_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 renesas_r69328_timings(struct udevice *dev,
struct display_timing *timing)
{
memcpy(timing, &default_timing, sizeof(*timing));
return 0;
}
static int renesas_r69328_of_to_plat(struct udevice *dev)
{
struct renesas_r69328_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 = gpio_request_by_name(dev, "enable-gpios", 0,
&priv->enable_gpio, GPIOD_IS_OUT);
if (ret) {
log_err("could not decode enable-gpios (%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 renesas_r69328_hw_init(struct udevice *dev)
{
struct renesas_r69328_priv *priv = dev_get_priv(dev);
int ret;
ret = dm_gpio_set_value(&priv->enable_gpio, 1);
if (ret) {
log_debug("%s: error changing enable-gpios (%d)\n",
__func__, ret);
return ret;
}
mdelay(5);
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(5);
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);
return 0;
}
static int renesas_r69328_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 renesas_r69328_hw_init(dev);
}
static const struct panel_ops renesas_r69328_ops = {
.enable_backlight = renesas_r69328_enable_backlight,
.set_backlight = renesas_r69328_set_backlight,
.get_display_timing = renesas_r69328_timings,
};
static const struct udevice_id renesas_r69328_ids[] = {
{ .compatible = "jdi,dx12d100vm0eaa" },
{ }
};
U_BOOT_DRIVER(renesas_r69328) = {
.name = "renesas_r69328",
.id = UCLASS_PANEL,
.of_match = renesas_r69328_ids,
.ops = &renesas_r69328_ops,
.of_to_plat = renesas_r69328_of_to_plat,
.probe = renesas_r69328_probe,
.plat_auto = sizeof(struct mipi_dsi_panel_plat),
.priv_auto = sizeof(struct renesas_r69328_priv),
};
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