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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2020 BayLibre, SAS
* Author: Neil Armstrong <narmstrong@baylibre.com>
*/
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <video/mipi_display.h>
#include <drm/drm_crtc.h>
#include <drm/drm_device.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
struct tdo_tl070wsh30_panel {
struct drm_panel base;
struct mipi_dsi_device *link;
struct regulator *supply;
struct gpio_desc *reset_gpio;
bool prepared;
};
static inline
struct tdo_tl070wsh30_panel *to_tdo_tl070wsh30_panel(struct drm_panel *panel)
{
return container_of(panel, struct tdo_tl070wsh30_panel, base);
}
static int tdo_tl070wsh30_panel_prepare(struct drm_panel *panel)
{
struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = to_tdo_tl070wsh30_panel(panel);
int err;
if (tdo_tl070wsh30->prepared)
return 0;
err = regulator_enable(tdo_tl070wsh30->supply);
if (err < 0)
return err;
usleep_range(10000, 11000);
gpiod_set_value_cansleep(tdo_tl070wsh30->reset_gpio, 1);
usleep_range(10000, 11000);
gpiod_set_value_cansleep(tdo_tl070wsh30->reset_gpio, 0);
msleep(200);
err = mipi_dsi_dcs_exit_sleep_mode(tdo_tl070wsh30->link);
if (err < 0) {
dev_err(panel->dev, "failed to exit sleep mode: %d\n", err);
regulator_disable(tdo_tl070wsh30->supply);
return err;
}
msleep(200);
err = mipi_dsi_dcs_set_display_on(tdo_tl070wsh30->link);
if (err < 0) {
dev_err(panel->dev, "failed to set display on: %d\n", err);
regulator_disable(tdo_tl070wsh30->supply);
return err;
}
msleep(20);
tdo_tl070wsh30->prepared = true;
return 0;
}
static int tdo_tl070wsh30_panel_unprepare(struct drm_panel *panel)
{
struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = to_tdo_tl070wsh30_panel(panel);
int err;
if (!tdo_tl070wsh30->prepared)
return 0;
err = mipi_dsi_dcs_set_display_off(tdo_tl070wsh30->link);
if (err < 0)
dev_err(panel->dev, "failed to set display off: %d\n", err);
usleep_range(10000, 11000);
err = mipi_dsi_dcs_enter_sleep_mode(tdo_tl070wsh30->link);
if (err < 0) {
dev_err(panel->dev, "failed to enter sleep mode: %d\n", err);
return err;
}
usleep_range(10000, 11000);
regulator_disable(tdo_tl070wsh30->supply);
tdo_tl070wsh30->prepared = false;
return 0;
}
static const struct drm_display_mode default_mode = {
.clock = 47250,
.hdisplay = 1024,
.hsync_start = 1024 + 46,
.hsync_end = 1024 + 46 + 80,
.htotal = 1024 + 46 + 80 + 100,
.vdisplay = 600,
.vsync_start = 600 + 5,
.vsync_end = 600 + 5 + 5,
.vtotal = 600 + 5 + 5 + 20,
.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
};
static int tdo_tl070wsh30_panel_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, &default_mode);
if (!mode) {
dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
default_mode.hdisplay, default_mode.vdisplay,
drm_mode_vrefresh(&default_mode));
return -ENOMEM;
}
drm_mode_set_name(mode);
drm_mode_probed_add(connector, mode);
connector->display_info.width_mm = 154;
connector->display_info.height_mm = 85;
connector->display_info.bpc = 8;
return 1;
}
static const struct drm_panel_funcs tdo_tl070wsh30_panel_funcs = {
.unprepare = tdo_tl070wsh30_panel_unprepare,
.prepare = tdo_tl070wsh30_panel_prepare,
.get_modes = tdo_tl070wsh30_panel_get_modes,
};
static const struct of_device_id tdo_tl070wsh30_of_match[] = {
{ .compatible = "tdo,tl070wsh30", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, tdo_tl070wsh30_of_match);
static int tdo_tl070wsh30_panel_add(struct tdo_tl070wsh30_panel *tdo_tl070wsh30)
{
struct device *dev = &tdo_tl070wsh30->link->dev;
int err;
tdo_tl070wsh30->supply = devm_regulator_get(dev, "power");
if (IS_ERR(tdo_tl070wsh30->supply))
return PTR_ERR(tdo_tl070wsh30->supply);
tdo_tl070wsh30->reset_gpio = devm_gpiod_get(dev, "reset",
GPIOD_OUT_LOW);
if (IS_ERR(tdo_tl070wsh30->reset_gpio)) {
err = PTR_ERR(tdo_tl070wsh30->reset_gpio);
dev_dbg(dev, "failed to get reset gpio: %d\n", err);
return err;
}
drm_panel_init(&tdo_tl070wsh30->base, &tdo_tl070wsh30->link->dev,
&tdo_tl070wsh30_panel_funcs, DRM_MODE_CONNECTOR_DSI);
err = drm_panel_of_backlight(&tdo_tl070wsh30->base);
if (err)
return err;
drm_panel_add(&tdo_tl070wsh30->base);
return 0;
}
static int tdo_tl070wsh30_panel_probe(struct mipi_dsi_device *dsi)
{
struct tdo_tl070wsh30_panel *tdo_tl070wsh30;
int err;
dsi->lanes = 4;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM;
tdo_tl070wsh30 = devm_kzalloc(&dsi->dev, sizeof(*tdo_tl070wsh30),
GFP_KERNEL);
if (!tdo_tl070wsh30)
return -ENOMEM;
mipi_dsi_set_drvdata(dsi, tdo_tl070wsh30);
tdo_tl070wsh30->link = dsi;
err = tdo_tl070wsh30_panel_add(tdo_tl070wsh30);
if (err < 0)
return err;
return mipi_dsi_attach(dsi);
}
static int tdo_tl070wsh30_panel_remove(struct mipi_dsi_device *dsi)
{
struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = mipi_dsi_get_drvdata(dsi);
int err;
err = mipi_dsi_detach(dsi);
if (err < 0)
dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
drm_panel_remove(&tdo_tl070wsh30->base);
drm_panel_disable(&tdo_tl070wsh30->base);
drm_panel_unprepare(&tdo_tl070wsh30->base);
return 0;
}
static void tdo_tl070wsh30_panel_shutdown(struct mipi_dsi_device *dsi)
{
struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = mipi_dsi_get_drvdata(dsi);
drm_panel_disable(&tdo_tl070wsh30->base);
drm_panel_unprepare(&tdo_tl070wsh30->base);
}
static struct mipi_dsi_driver tdo_tl070wsh30_panel_driver = {
.driver = {
.name = "panel-tdo-tl070wsh30",
.of_match_table = tdo_tl070wsh30_of_match,
},
.probe = tdo_tl070wsh30_panel_probe,
.remove = tdo_tl070wsh30_panel_remove,
.shutdown = tdo_tl070wsh30_panel_shutdown,
};
module_mipi_dsi_driver(tdo_tl070wsh30_panel_driver);
MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
MODULE_DESCRIPTION("TDO TL070WSH30 panel driver");
MODULE_LICENSE("GPL v2");
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