#include <linux/delay.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/media-bus-format.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <drm/drm_connector.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
struct rb070d30_panel {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
struct regulator *supply;
struct {
struct gpio_desc *power;
struct gpio_desc *reset;
struct gpio_desc *updn;
struct gpio_desc *shlr;
} gpios;
};
static inline struct rb070d30_panel *panel_to_rb070d30_panel(struct drm_panel *panel)
{
return container_of(panel, struct rb070d30_panel, panel);
}
static int rb070d30_panel_prepare(struct drm_panel *panel)
{
struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
int ret;
ret = regulator_enable(ctx->supply);
if (ret < 0) {
dev_err(&ctx->dsi->dev, "Failed to enable supply: %d\n", ret);
return ret;
}
msleep(20);
gpiod_set_value_cansleep(ctx->gpios.power, 1);
msleep(20);
gpiod_set_value_cansleep(ctx->gpios.reset, 1);
msleep(20);
return 0;
}
static int rb070d30_panel_unprepare(struct drm_panel *panel)
{
struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
gpiod_set_value_cansleep(ctx->gpios.reset, 0);
gpiod_set_value_cansleep(ctx->gpios.power, 0);
regulator_disable(ctx->supply);
return 0;
}
static int rb070d30_panel_enable(struct drm_panel *panel)
{
struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
return mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
}
static int rb070d30_panel_disable(struct drm_panel *panel)
{
struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
return mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
}
static const struct drm_display_mode default_mode = {
.clock = 51206,
.hdisplay = 1024,
.hsync_start = 1024 + 160,
.hsync_end = 1024 + 160 + 80,
.htotal = 1024 + 160 + 80 + 80,
.vdisplay = 600,
.vsync_start = 600 + 12,
.vsync_end = 600 + 12 + 10,
.vtotal = 600 + 12 + 10 + 13,
.width_mm = 154,
.height_mm = 85,
};
static int rb070d30_panel_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct rb070d30_panel *ctx = panel_to_rb070d30_panel(panel);
struct drm_display_mode *mode;
static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
mode = drm_mode_duplicate(connector->dev, &default_mode);
if (!mode) {
dev_err(&ctx->dsi->dev, "Failed to add mode " DRM_MODE_FMT "\n",
DRM_MODE_ARG(&default_mode));
return -EINVAL;
}
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(connector, mode);
connector->display_info.bpc = 8;
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
drm_display_info_set_bus_formats(&connector->display_info,
&bus_format, 1);
return 1;
}
static const struct drm_panel_funcs rb070d30_panel_funcs = {
.get_modes = rb070d30_panel_get_modes,
.prepare = rb070d30_panel_prepare,
.enable = rb070d30_panel_enable,
.disable = rb070d30_panel_disable,
.unprepare = rb070d30_panel_unprepare,
};
static int rb070d30_panel_dsi_probe(struct mipi_dsi_device *dsi)
{
struct rb070d30_panel *ctx;
int ret;
ctx = devm_drm_panel_alloc(&dsi->dev, struct rb070d30_panel, panel,
&rb070d30_panel_funcs,
DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
ctx->supply = devm_regulator_get(&dsi->dev, "vcc-lcd");
if (IS_ERR(ctx->supply))
return PTR_ERR(ctx->supply);
mipi_dsi_set_drvdata(dsi, ctx);
ctx->dsi = dsi;
ctx->gpios.reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ctx->gpios.reset)) {
dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");
return PTR_ERR(ctx->gpios.reset);
}
ctx->gpios.power = devm_gpiod_get(&dsi->dev, "power", GPIOD_OUT_LOW);
if (IS_ERR(ctx->gpios.power)) {
dev_err(&dsi->dev, "Couldn't get our power GPIO\n");
return PTR_ERR(ctx->gpios.power);
}
ctx->gpios.updn = devm_gpiod_get(&dsi->dev, "updn", GPIOD_OUT_LOW);
if (IS_ERR(ctx->gpios.updn)) {
dev_err(&dsi->dev, "Couldn't get our updn GPIO\n");
return PTR_ERR(ctx->gpios.updn);
}
ctx->gpios.shlr = devm_gpiod_get(&dsi->dev, "shlr", GPIOD_OUT_LOW);
if (IS_ERR(ctx->gpios.shlr)) {
dev_err(&dsi->dev, "Couldn't get our shlr GPIO\n");
return PTR_ERR(ctx->gpios.shlr);
}
ret = drm_panel_of_backlight(&ctx->panel);
if (ret)
return ret;
drm_panel_add(&ctx->panel);
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->lanes = 4;
ret = mipi_dsi_attach(dsi);
if (ret < 0) {
drm_panel_remove(&ctx->panel);
return ret;
}
return 0;
}
static void rb070d30_panel_dsi_remove(struct mipi_dsi_device *dsi)
{
struct rb070d30_panel *ctx = mipi_dsi_get_drvdata(dsi);
mipi_dsi_detach(dsi);
drm_panel_remove(&ctx->panel);
}
static const struct of_device_id rb070d30_panel_of_match[] = {
{ .compatible = "ronbo,rb070d30" },
{ },
};
MODULE_DEVICE_TABLE(of, rb070d30_panel_of_match);
static struct mipi_dsi_driver rb070d30_panel_driver = {
.probe = rb070d30_panel_dsi_probe,
.remove = rb070d30_panel_dsi_remove,
.driver = {
.name = "panel-ronbo-rb070d30",
.of_match_table = rb070d30_panel_of_match,
},
};
module_mipi_dsi_driver(rb070d30_panel_driver);
MODULE_AUTHOR("Boris Brezillon <boris.brezillon@bootlin.com>");
MODULE_AUTHOR("Konstantin Sudakov <k.sudakov@integrasources.com>");
MODULE_DESCRIPTION("Ronbo RB070D30 Panel Driver");
MODULE_LICENSE("GPL");
