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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2016 Google, Inc
* Written by Simon Glass <[email protected]>
*/
#include <backlight.h>
#include <dm.h>
#include <edid.h>
#include <i2c.h>
#include <log.h>
#include <mipi_dsi.h>
#include <panel.h>
#include <asm/gpio.h>
#include <power/regulator.h>
#define EDID_I2C_ADDR 0x50
struct simple_panel_priv {
struct udevice *reg;
struct udevice *backlight;
struct gpio_desc enable;
};
struct simple_panel_drv_data {
const struct drm_display_mode *modes;
unsigned int num_modes;
const struct mipi_dsi_panel_plat *mipi_dsi;
};
static int simple_panel_enable_backlight(struct udevice *dev)
{
struct simple_panel_priv *priv = dev_get_priv(dev);
int ret;
debug("%s: start, backlight = '%s'\n", __func__, priv->backlight->name);
dm_gpio_set_value(&priv->enable, 1);
ret = backlight_enable(priv->backlight);
debug("%s: done, ret = %d\n", __func__, ret);
if (ret)
return ret;
return 0;
}
static int simple_panel_set_backlight(struct udevice *dev, int percent)
{
struct simple_panel_priv *priv = dev_get_priv(dev);
int ret;
debug("%s: start, backlight = '%s'\n", __func__, priv->backlight->name);
dm_gpio_set_value(&priv->enable, 1);
ret = backlight_set_brightness(priv->backlight, percent);
debug("%s: done, ret = %d\n", __func__, ret);
if (ret)
return ret;
return 0;
}
#if CONFIG_IS_ENABLED(I2C_EDID) && CONFIG_IS_ENABLED(DM_I2C)
static int simple_panel_get_edid_timing(struct udevice *dev,
struct display_timing *timings)
{
struct udevice *panel_ddc, *panel_edid;
struct display_timing edid_timing;
u8 edid_buf[EDID_SIZE] = { 0 };
int ret, bpc;
/* Check for DDC i2c if no timings are provided */
ret = uclass_get_device_by_phandle(UCLASS_I2C, dev,
"ddc-i2c-bus",
&panel_ddc);
if (ret) {
log_debug("%s: cannot get DDC i2c bus: error %d\n",
__func__, ret);
return ret;
}
ret = dm_i2c_probe(panel_ddc, EDID_I2C_ADDR, 0, &panel_edid);
if (ret) {
log_debug("%s: cannot probe EDID: error %d\n",
__func__, ret);
return ret;
}
ret = dm_i2c_read(panel_edid, 0, edid_buf, sizeof(edid_buf));
if (ret) {
log_debug("%s: cannot dump EDID buffer: error %d\n",
__func__, ret);
return ret;
}
ret = edid_get_timing(edid_buf, sizeof(edid_buf),
&edid_timing, &bpc);
if (ret) {
log_debug("%s: cannot decode EDID info: error %d\n",
__func__, ret);
return ret;
}
memcpy(timings, &edid_timing, sizeof(*timings));
return 0;
}
#else
static int simple_panel_get_edid_timing(struct udevice *dev,
struct display_timing *timings)
{
return -ENOTSUPP;
}
#endif
static int simple_panel_get_modes(struct udevice *dev,
const struct drm_display_mode **modes)
{
const struct simple_panel_drv_data *data =
(const struct simple_panel_drv_data *)dev_get_driver_data(dev);
if (!data || !data->modes || data->num_modes == 0)
return -ENODEV;
*modes = data->modes;
return data->num_modes;
}
static int simple_panel_get_display_timing(struct udevice *dev,
struct display_timing *timings)
{
const struct simple_panel_drv_data *data =
(const struct simple_panel_drv_data *)dev_get_driver_data(dev);
const void *blob = gd->fdt_blob;
int ret;
/* Prefer the use of drm_display_mode if available */
if (data && data->modes && data->num_modes > 0)
return -ENODEV;
/* Check for timing subnode in panel node */
ret = fdtdec_decode_display_timing(blob, dev_of_offset(dev),
0, timings);
if (!ret)
return ret;
return simple_panel_get_edid_timing(dev, timings);
}
static int simple_panel_of_to_plat(struct udevice *dev)
{
struct simple_panel_priv *priv = dev_get_priv(dev);
int ret;
if (CONFIG_IS_ENABLED(DM_REGULATOR)) {
ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
"power-supply", &priv->reg);
if (ret) {
debug("%s: Warning: cannot get power supply: ret=%d\n",
__func__, ret);
if (ret != -ENOENT)
return ret;
}
}
ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
"backlight", &priv->backlight);
if (ret) {
debug("%s: Cannot get backlight: ret=%d\n", __func__, ret);
if (ret != -ENOENT)
return log_ret(ret);
}
ret = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable,
GPIOD_IS_OUT);
if (ret) {
debug("%s: Warning: cannot get enable GPIO: ret=%d\n",
__func__, ret);
if (ret != -ENOENT)
return log_ret(ret);
}
return 0;
}
static int simple_panel_probe(struct udevice *dev)
{
struct simple_panel_priv *priv = dev_get_priv(dev);
const struct simple_panel_drv_data *data =
(const struct simple_panel_drv_data *)dev_get_driver_data(dev);
struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
int ret;
ret = regulator_set_enable_if_allowed(priv->reg, true);
if (ret && ret != -ENOSYS) {
debug("%s: failed to enable regulator '%s' %d\n",
__func__, priv->reg->name, ret);
return ret;
}
if (data && data->mipi_dsi)
memcpy(plat, data->mipi_dsi, sizeof(struct mipi_dsi_panel_plat));
return 0;
}
static const struct panel_ops simple_panel_ops = {
.enable_backlight = simple_panel_enable_backlight,
.set_backlight = simple_panel_set_backlight,
.get_display_timing = simple_panel_get_display_timing,
.get_modes = simple_panel_get_modes,
};
static const struct mipi_dsi_panel_plat panasonic_vvx10f004b00 = {
.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
MIPI_DSI_CLOCK_NON_CONTINUOUS,
.format = MIPI_DSI_FMT_RGB888,
.lanes = 4,
};
static const struct simple_panel_drv_data panasonic_vvx10f004b00_data = {
.mipi_dsi = &panasonic_vvx10f004b00,
};
static const struct drm_display_mode tfc_s9700rtwv43tr_01b_mode = {
.clock = 30000,
.hdisplay = 800,
.hsync_start = 800 + 39,
.hsync_end = 800 + 39 + 47,
.htotal = 800 + 39 + 47 + 39,
.vdisplay = 480,
.vsync_start = 480 + 13,
.vsync_end = 480 + 13 + 2,
.vtotal = 480 + 13 + 2 + 29,
.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
};
static const struct simple_panel_drv_data tfc_s9700rtwv43tr_01b_data = {
.modes = &tfc_s9700rtwv43tr_01b_mode,
.num_modes = 1,
};
static const struct udevice_id simple_panel_ids[] = {
{ .compatible = "simple-panel" },
{ .compatible = "panel-lvds" },
{ .compatible = "auo,b133xtn01" },
{ .compatible = "auo,b116xw03" },
{ .compatible = "auo,b133htn01" },
{ .compatible = "boe,nv140fhmn49" },
{ .compatible = "lg,lb070wv8" },
{ .compatible = "sharp,lq123p1jx31" },
{ .compatible = "boe,nv101wxmn51" },
{ .compatible = "panasonic,vvx10f004b00",
.data = (ulong)&panasonic_vvx10f004b00_data },
{ .compatible = "tfc,s9700rtwv43tr-01b",
.data = (ulong)&tfc_s9700rtwv43tr_01b_data },
{ .compatible = "rocktech,rk043fn48h" },
{ }
};
U_BOOT_DRIVER(simple_panel) = {
.name = "simple_panel",
.id = UCLASS_PANEL,
.of_match = simple_panel_ids,
.ops = &simple_panel_ops,
.of_to_plat = simple_panel_of_to_plat,
.probe = simple_panel_probe,
.priv_auto = sizeof(struct simple_panel_priv),
.plat_auto = sizeof(struct mipi_dsi_panel_plat),
};
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