#include <linux/backlight.h>
#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_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
#include <drm/drm_probe_helper.h>
#define MCS_ACCESS_PROT_OFF 0xb0
#define MCS_UNKNOWN_B7 0xb7
#define MCS_BIAS_CURRENT_CTRL 0xd1
#define MCS_PASSWD1 0xf0
#define MCS_PASSWD2 0xfc
#define MCS_UNKNOWN_FF 0xff
struct ams639rq08 {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
struct gpio_desc *reset_gpio;
struct regulator_bulk_data *supplies;
};
static const struct regulator_bulk_data ams639rq08_supplies[] = {
{ .supply = "vdd3p3" },
{ .supply = "vddio" },
{ .supply = "vsn" },
{ .supply = "vsp" },
};
static inline struct ams639rq08 *to_ams639rq08(struct drm_panel *panel)
{
return container_of(panel, struct ams639rq08, panel);
}
static void ams639rq08_reset(struct ams639rq08 *ctx)
{
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(1000, 2000);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
usleep_range(10000, 11000);
}
static int ams639rq08_on(struct ams639rq08 *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi;
struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD1, 0x5a, 0x5a);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD2, 0x5a, 0x5a);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ACCESS_PROT_OFF, 0x0c);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_UNKNOWN_FF, 0x10);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ACCESS_PROT_OFF, 0x2f);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_BIAS_CURRENT_CTRL, 0x01);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD1, 0xa5, 0xa5);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD2, 0xa5, 0xa5);
mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
usleep_range(10000, 11000);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD1, 0x5a, 0x5a);
mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_UNKNOWN_B7, 0x01, 0x4b);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ACCESS_PROT_OFF, 0x06);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_UNKNOWN_B7, 0x10);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD1, 0xa5, 0xa5);
mipi_dsi_dcs_set_page_address_multi(&dsi_ctx, 0x0000, 0x0923);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD1, 0x5a, 0x5a);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD2, 0x5a, 0x5a);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ACCESS_PROT_OFF, 0x23);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_BIAS_CURRENT_CTRL, 0x11);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xe9, 0x11, 0x55,
0xa6, 0x75, 0xa3,
0xb9, 0xa1, 0x4a,
0x00, 0x1a, 0xb8);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xe1,
0x00, 0x00, 0x02,
0x02, 0x42, 0x02);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xe2,
0x00, 0x00, 0x00,
0x00, 0x00, 0x00);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ACCESS_PROT_OFF, 0x0c);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xe1, 0x19);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD1, 0xa5, 0xa5);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD2, 0xa5, 0xa5);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
mipi_dsi_dcs_set_display_brightness_multi(&dsi_ctx, 0x0000);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
mipi_dsi_msleep(&dsi_ctx, 67);
mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
return dsi_ctx.accum_err;
}
static void ams639rq08_off(struct ams639rq08 *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi;
struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 120);
}
static int ams639rq08_prepare(struct drm_panel *panel)
{
struct ams639rq08 *ctx = to_ams639rq08(panel);
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(ams639rq08_supplies),
ctx->supplies);
if (ret < 0)
return ret;
ams639rq08_reset(ctx);
ret = ams639rq08_on(ctx);
if (ret < 0) {
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
regulator_bulk_disable(ARRAY_SIZE(ams639rq08_supplies),
ctx->supplies);
return ret;
}
return 0;
}
static int ams639rq08_unprepare(struct drm_panel *panel)
{
struct ams639rq08 *ctx = to_ams639rq08(panel);
ams639rq08_off(ctx);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
regulator_bulk_disable(ARRAY_SIZE(ams639rq08_supplies),
ctx->supplies);
return 0;
}
static const struct drm_display_mode ams639rq08_mode = {
.clock = (1080 + 64 + 20 + 64) * (2340 + 64 + 20 + 64) * 60 / 1000,
.hdisplay = 1080,
.hsync_start = 1080 + 64,
.hsync_end = 1080 + 64 + 20,
.htotal = 1080 + 64 + 20 + 64,
.vdisplay = 2340,
.vsync_start = 2340 + 64,
.vsync_end = 2340 + 64 + 20,
.vtotal = 2340 + 64 + 20 + 64,
.width_mm = 68,
.height_mm = 147,
.type = DRM_MODE_TYPE_DRIVER,
};
static int ams639rq08_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
return drm_connector_helper_get_modes_fixed(connector, &ams639rq08_mode);
}
static const struct drm_panel_funcs ams639rq08_panel_funcs = {
.prepare = ams639rq08_prepare,
.unprepare = ams639rq08_unprepare,
.get_modes = ams639rq08_get_modes,
};
static int ams639rq08_bl_update_status(struct backlight_device *bl)
{
struct mipi_dsi_device *dsi = bl_get_data(bl);
u16 brightness = backlight_get_brightness(bl);
int ret;
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
if (ret < 0)
return ret;
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
return 0;
}
static int ams639rq08_bl_get_brightness(struct backlight_device *bl)
{
struct mipi_dsi_device *dsi = bl_get_data(bl);
u16 brightness;
int ret;
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness);
if (ret < 0)
return ret;
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
return brightness;
}
static const struct backlight_ops ams639rq08_bl_ops = {
.update_status = ams639rq08_bl_update_status,
.get_brightness = ams639rq08_bl_get_brightness,
};
static struct backlight_device *
ams639rq08_create_backlight(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
const struct backlight_properties props = {
.type = BACKLIGHT_RAW,
.brightness = 1023,
.max_brightness = 2047,
};
return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
&ams639rq08_bl_ops, &props);
}
static int ams639rq08_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct ams639rq08 *ctx;
int ret;
ctx = devm_drm_panel_alloc(dev, struct ams639rq08, panel,
&ams639rq08_panel_funcs,
DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
ret = devm_regulator_bulk_get_const(&dsi->dev,
ARRAY_SIZE(ams639rq08_supplies),
ams639rq08_supplies,
&ctx->supplies);
if (ret < 0)
return dev_err_probe(dev, ret, "Failed to get regulators\n");
ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(ctx->reset_gpio))
return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
"Failed to get reset-gpios\n");
ctx->dsi = dsi;
mipi_dsi_set_drvdata(dsi, ctx);
dsi->lanes = 4;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM;
ctx->panel.prepare_prev_first = true;
ctx->panel.backlight = ams639rq08_create_backlight(dsi);
if (IS_ERR(ctx->panel.backlight))
return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
"Failed to create backlight\n");
drm_panel_add(&ctx->panel);
ret = devm_mipi_dsi_attach(dev, dsi);
if (ret < 0) {
drm_panel_remove(&ctx->panel);
return dev_err_probe(dev, ret, "Failed to attach to DSI host\n");
}
return 0;
}
static void ams639rq08_remove(struct mipi_dsi_device *dsi)
{
struct ams639rq08 *ctx = mipi_dsi_get_drvdata(dsi);
drm_panel_remove(&ctx->panel);
}
static const struct of_device_id ams639rq08_of_match[] = {
{ .compatible = "samsung,ams639rq08" },
{ }
};
MODULE_DEVICE_TABLE(of, ams639rq08_of_match);
static struct mipi_dsi_driver ams639rq08_driver = {
.probe = ams639rq08_probe,
.remove = ams639rq08_remove,
.driver = {
.name = "panel-samsung-ams639rq08",
.of_match_table = ams639rq08_of_match,
},
};
module_mipi_dsi_driver(ams639rq08_driver);
MODULE_AUTHOR("Danila Tikhonov <danila@jiaxyga.com>");
MODULE_DESCRIPTION("DRM driver for SAMSUNG AMS639RQ08 cmd mode dsi panel");
MODULE_LICENSE("GPL");
