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// SPDX-License-Identifier: GPL-2.0+
/*
* Sharp LQ101R1SX01 DSI panel driver
*
* Copyright (C) 2014 NVIDIA Corporation
* Copyright (c) 2023 Svyatoslav Ryhel <clamor95@gmail.com>
*/
#include <backlight.h>
#include <dm.h>
#include <panel.h>
#include <log.h>
#include <mipi_dsi.h>
#include <linux/delay.h>
#include <power/regulator.h>
struct sharp_lq101r1sx01_priv {
struct udevice *backlight;
struct udevice *panel_sec;
struct udevice *vcc;
};
static struct display_timing default_timing = {
.pixelclock.typ = 278000000,
.hactive.typ = 2560,
.hfront_porch.typ = 128,
.hback_porch.typ = 64,
.hsync_len.typ = 64,
.vactive.typ = 1600,
.vfront_porch.typ = 4,
.vback_porch.typ = 8,
.vsync_len.typ = 32,
};
static int sharp_lq101r1sx01_write(struct mipi_dsi_device *dsi,
u16 offset, u8 value)
{
u8 payload[3] = { offset >> 8, offset & 0xff, value };
int ret;
ret = mipi_dsi_generic_write(dsi, payload, sizeof(payload));
if (ret < 0) {
log_debug("%s: failed to write %02x to %04x: %zd\n",
__func__, value, offset, ret);
return ret;
}
ret = mipi_dsi_dcs_nop(dsi);
if (ret < 0) {
log_debug("%s: failed to send DCS nop: %zd\n",
__func__, ret);
return ret;
}
udelay(20);
return 0;
}
static int sharp_setup_symmetrical_split(struct mipi_dsi_device *left,
struct mipi_dsi_device *right,
struct display_timing *timing)
{
int ret;
ret = mipi_dsi_dcs_set_column_address(left, 0,
timing->hactive.typ / 2 - 1);
if (ret < 0) {
log_debug("%s: failed to set column address: %d\n",
__func__, ret);
return ret;
}
ret = mipi_dsi_dcs_set_page_address(left, 0, timing->vactive.typ - 1);
if (ret < 0) {
log_debug("%s: failed to set page address: %d\n",
__func__, ret);
return ret;
}
ret = mipi_dsi_dcs_set_column_address(right, timing->hactive.typ / 2,
timing->hactive.typ - 1);
if (ret < 0) {
log_debug("%s: failed to set column address: %d\n",
__func__, ret);
return ret;
}
ret = mipi_dsi_dcs_set_page_address(right, 0, timing->vactive.typ - 1);
if (ret < 0) {
log_debug("%s: failed to set page address: %d\n",
__func__, ret);
return ret;
}
return 0;
}
static int sharp_lq101r1sx01_enable_backlight(struct udevice *dev)
{
struct sharp_lq101r1sx01_priv *priv = dev_get_priv(dev);
if (!priv->panel_sec)
return 0;
struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
struct mipi_dsi_panel_plat *plat_sec = dev_get_plat(priv->panel_sec);
struct mipi_dsi_device *link1 = plat->device;
struct mipi_dsi_device *link2 = plat_sec->device;
int ret;
ret = mipi_dsi_dcs_exit_sleep_mode(link1);
if (ret < 0) {
log_debug("%s: failed to exit sleep mode: %d\n",
__func__, ret);
return ret;
}
/* set left-right mode */
ret = sharp_lq101r1sx01_write(link1, 0x1000, 0x2a);
if (ret < 0) {
log_debug("%s: failed to set left-right mode: %d\n",
__func__, ret);
return ret;
}
/* enable command mode */
ret = sharp_lq101r1sx01_write(link1, 0x1001, 0x01);
if (ret < 0) {
log_debug("%s: failed to enable command mode: %d\n",
__func__, ret);
return ret;
}
ret = mipi_dsi_dcs_set_pixel_format(link1, MIPI_DCS_PIXEL_FMT_24BIT);
if (ret < 0) {
log_debug("%s: failed to set pixel format: %d\n",
__func__, ret);
return ret;
}
/*
* TODO: The device supports both left-right and even-odd split
* configurations, but this driver currently supports only the left-
* right split. To support a different mode a mechanism needs to be
* put in place to communicate the configuration back to the DSI host
* controller.
*/
ret = sharp_setup_symmetrical_split(link1, link2, &default_timing);
if (ret < 0) {
log_debug("%s: failed to set up symmetrical split: %d\n",
__func__, ret);
return ret;
}
ret = mipi_dsi_dcs_set_display_on(link1);
if (ret < 0) {
log_debug("%s: failed to set panel on: %d\n",
__func__, ret);
return ret;
}
mdelay(20);
return 0;
}
static int sharp_lq101r1sx01_set_backlight(struct udevice *dev, int percent)
{
struct sharp_lq101r1sx01_priv *priv = dev_get_priv(dev);
int ret;
if (!priv->panel_sec)
return 0;
ret = backlight_enable(priv->backlight);
if (ret)
return ret;
return backlight_set_brightness(priv->backlight, percent);
}
static int sharp_lq101r1sx01_timings(struct udevice *dev,
struct display_timing *timing)
{
memcpy(timing, &default_timing, sizeof(*timing));
return 0;
}
static int sharp_lq101r1sx01_of_to_plat(struct udevice *dev)
{
struct sharp_lq101r1sx01_priv *priv = dev_get_priv(dev);
int ret;
/* If node has no link2 it is secondary panel */
if (!dev_read_bool(dev, "link2"))
return 0;
ret = uclass_get_device_by_phandle(UCLASS_PANEL, dev,
"link2", &priv->panel_sec);
if (ret) {
log_debug("%s: cannot get secondary panel: ret = %d\n",
__func__, ret);
return 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 = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
"power-supply", &priv->vcc);
if (ret) {
log_debug("%s: cannot get power-supply: ret = %d\n",
__func__, ret);
return ret;
}
return 0;
}
static int sharp_lq101r1sx01_hw_init(struct udevice *dev)
{
struct sharp_lq101r1sx01_priv *priv = dev_get_priv(dev);
int ret;
if (!priv->panel_sec)
return 0;
ret = regulator_set_enable_if_allowed(priv->vcc, 1);
if (ret) {
log_debug("%s: enabling power-supply failed (%d)\n",
__func__, ret);
return ret;
}
/*
* According to the datasheet, the panel needs around 10 ms to fully
* power up. At least another 120 ms is required before exiting sleep
* mode to make sure the panel is ready. Throw in another 20 ms for
* good measure.
*/
mdelay(150);
return 0;
}
static int sharp_lq101r1sx01_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_LPM;
return sharp_lq101r1sx01_hw_init(dev);
}
static const struct panel_ops sharp_lq101r1sx01_ops = {
.enable_backlight = sharp_lq101r1sx01_enable_backlight,
.set_backlight = sharp_lq101r1sx01_set_backlight,
.get_display_timing = sharp_lq101r1sx01_timings,
};
static const struct udevice_id sharp_lq101r1sx01_ids[] = {
{ .compatible = "sharp,lq101r1sx01" },
{ }
};
U_BOOT_DRIVER(sharp_lq101r1sx01) = {
.name = "sharp_lq101r1sx01",
.id = UCLASS_PANEL,
.of_match = sharp_lq101r1sx01_ids,
.ops = &sharp_lq101r1sx01_ops,
.of_to_plat = sharp_lq101r1sx01_of_to_plat,
.probe = sharp_lq101r1sx01_probe,
.plat_auto = sizeof(struct mipi_dsi_panel_plat),
.priv_auto = sizeof(struct sharp_lq101r1sx01_priv),
};
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