#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/mod_devicetable.h>
#include <linux/module.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>
#define MCS_LEVEL2_KEY 0xf0
#define MCS_MTP_KEY 0xf1
#define MCS_MTP_SET3 0xd4
#define MAX_BRIGHTNESS 100
#define DEFAULT_BRIGHTNESS 80
#define NUM_GAMMA_STEPS 9
#define GAMMA_CMD_CNT 28
#define FIRST_COLUMN 20
struct s6e63j0x03 {
struct device *dev;
struct drm_panel panel;
struct backlight_device *bl_dev;
struct regulator_bulk_data supplies[2];
struct gpio_desc *reset_gpio;
};
static const struct drm_display_mode default_mode = {
.clock = 4649,
.hdisplay = 320,
.hsync_start = 320 + 1,
.hsync_end = 320 + 1 + 1,
.htotal = 320 + 1 + 1 + 1,
.vdisplay = 320,
.vsync_start = 320 + 150,
.vsync_end = 320 + 150 + 1,
.vtotal = 320 + 150 + 1 + 2,
.flags = 0,
};
static const unsigned char gamma_tbl[NUM_GAMMA_STEPS][GAMMA_CMD_CNT] = {
{
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x7f, 0x7f, 0x7f, 0x52, 0x6b, 0x6f, 0x26,
0x28, 0x2d, 0x28, 0x26, 0x27, 0x33, 0x34, 0x32, 0x36, 0x36,
0x35, 0x00, 0xab, 0x00, 0xae, 0x00, 0xbf
},
{
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x70, 0x7f, 0x7f, 0x4e, 0x64, 0x69, 0x26,
0x27, 0x2a, 0x28, 0x29, 0x27, 0x31, 0x32, 0x31, 0x35, 0x34,
0x35, 0x00, 0xc4, 0x00, 0xca, 0x00, 0xdc
},
{
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x65, 0x7b, 0x7d, 0x5f, 0x67, 0x68, 0x2a,
0x28, 0x29, 0x28, 0x2a, 0x27, 0x31, 0x2f, 0x30, 0x34, 0x33,
0x34, 0x00, 0xd9, 0x00, 0xe4, 0x00, 0xf5
},
{
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x4d, 0x6f, 0x71, 0x67, 0x6a, 0x6c, 0x29,
0x28, 0x28, 0x28, 0x29, 0x27, 0x30, 0x2e, 0x30, 0x32, 0x31,
0x31, 0x00, 0xea, 0x00, 0xf6, 0x01, 0x09
},
{
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x3d, 0x66, 0x68, 0x69, 0x69, 0x69, 0x28,
0x28, 0x27, 0x28, 0x28, 0x27, 0x30, 0x2e, 0x2f, 0x31, 0x31,
0x30, 0x00, 0xf9, 0x01, 0x05, 0x01, 0x1b
},
{
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x31, 0x51, 0x53, 0x66, 0x66, 0x67, 0x28,
0x29, 0x27, 0x28, 0x27, 0x27, 0x2e, 0x2d, 0x2e, 0x31, 0x31,
0x30, 0x01, 0x04, 0x01, 0x11, 0x01, 0x29
},
{
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x2f, 0x4f, 0x51, 0x67, 0x65, 0x65, 0x29,
0x2a, 0x28, 0x27, 0x25, 0x26, 0x2d, 0x2c, 0x2c, 0x30, 0x30,
0x30, 0x01, 0x14, 0x01, 0x23, 0x01, 0x3b
},
{
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x2c, 0x4d, 0x50, 0x65, 0x63, 0x64, 0x2a,
0x2c, 0x29, 0x26, 0x24, 0x25, 0x2c, 0x2b, 0x2b, 0x30, 0x30,
0x30, 0x01, 0x1e, 0x01, 0x2f, 0x01, 0x47
},
{
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x38, 0x61, 0x64, 0x65, 0x63, 0x64, 0x28,
0x2a, 0x27, 0x26, 0x23, 0x25, 0x2b, 0x2b, 0x2a, 0x30, 0x2f,
0x30, 0x01, 0x2d, 0x01, 0x3f, 0x01, 0x57
}
};
static inline struct s6e63j0x03 *panel_to_s6e63j0x03(struct drm_panel *panel)
{
return container_of(panel, struct s6e63j0x03, panel);
}
static inline ssize_t s6e63j0x03_dcs_write_seq(struct s6e63j0x03 *ctx,
const void *seq, size_t len)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
return mipi_dsi_dcs_write_buffer(dsi, seq, len);
}
#define s6e63j0x03_dcs_write_seq_static(ctx, seq...) \
({ \
static const u8 d[] = { seq }; \
s6e63j0x03_dcs_write_seq(ctx, d, ARRAY_SIZE(d)); \
})
static inline int s6e63j0x03_enable_lv2_command(struct s6e63j0x03 *ctx)
{
return s6e63j0x03_dcs_write_seq_static(ctx, MCS_LEVEL2_KEY, 0x5a, 0x5a);
}
static inline int s6e63j0x03_apply_mtp_key(struct s6e63j0x03 *ctx, bool on)
{
if (on)
return s6e63j0x03_dcs_write_seq_static(ctx,
MCS_MTP_KEY, 0x5a, 0x5a);
return s6e63j0x03_dcs_write_seq_static(ctx, MCS_MTP_KEY, 0xa5, 0xa5);
}
static int s6e63j0x03_power_on(struct s6e63j0x03 *ctx)
{
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
if (ret < 0)
return ret;
msleep(30);
gpiod_set_value(ctx->reset_gpio, 1);
usleep_range(1000, 2000);
gpiod_set_value(ctx->reset_gpio, 0);
usleep_range(5000, 6000);
return 0;
}
static int s6e63j0x03_power_off(struct s6e63j0x03 *ctx)
{
return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
}
static unsigned int s6e63j0x03_get_brightness_index(unsigned int brightness)
{
unsigned int index;
index = brightness / (MAX_BRIGHTNESS / NUM_GAMMA_STEPS);
if (index >= NUM_GAMMA_STEPS)
index = NUM_GAMMA_STEPS - 1;
return index;
}
static int s6e63j0x03_update_gamma(struct s6e63j0x03 *ctx,
unsigned int brightness)
{
struct backlight_device *bl_dev = ctx->bl_dev;
unsigned int index = s6e63j0x03_get_brightness_index(brightness);
int ret;
ret = s6e63j0x03_apply_mtp_key(ctx, true);
if (ret < 0)
return ret;
ret = s6e63j0x03_dcs_write_seq(ctx, gamma_tbl[index], GAMMA_CMD_CNT);
if (ret < 0)
return ret;
ret = s6e63j0x03_apply_mtp_key(ctx, false);
if (ret < 0)
return ret;
bl_dev->props.brightness = brightness;
return 0;
}
static int s6e63j0x03_set_brightness(struct backlight_device *bl_dev)
{
struct s6e63j0x03 *ctx = bl_get_data(bl_dev);
unsigned int brightness = bl_dev->props.brightness;
return s6e63j0x03_update_gamma(ctx, brightness);
}
static const struct backlight_ops s6e63j0x03_bl_ops = {
.update_status = s6e63j0x03_set_brightness,
};
static int s6e63j0x03_disable(struct drm_panel *panel)
{
struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int ret;
ret = mipi_dsi_dcs_set_display_off(dsi);
if (ret < 0)
return ret;
ctx->bl_dev->props.power = BACKLIGHT_POWER_REDUCED;
ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
if (ret < 0)
return ret;
msleep(120);
return 0;
}
static int s6e63j0x03_unprepare(struct drm_panel *panel)
{
struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel);
int ret;
ret = s6e63j0x03_power_off(ctx);
if (ret < 0)
return ret;
ctx->bl_dev->props.power = BACKLIGHT_POWER_OFF;
return 0;
}
static int s6e63j0x03_panel_init(struct s6e63j0x03 *ctx)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int ret;
ret = s6e63j0x03_enable_lv2_command(ctx);
if (ret < 0)
return ret;
ret = s6e63j0x03_apply_mtp_key(ctx, true);
if (ret < 0)
return ret;
ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xf2, 0x1c, 0x28);
if (ret < 0)
return ret;
ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xb5, 0x00, 0x02, 0x00);
if (ret < 0)
return ret;
ret = mipi_dsi_dcs_set_column_address(dsi, FIRST_COLUMN,
default_mode.hdisplay - 1 + FIRST_COLUMN);
if (ret < 0)
return ret;
ret = mipi_dsi_dcs_set_page_address(dsi, 0, default_mode.vdisplay - 1);
if (ret < 0)
return ret;
ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xf8, 0x08, 0x08, 0x08, 0x17,
0x00, 0x2a, 0x02, 0x26, 0x00, 0x00, 0x02, 0x00, 0x00);
if (ret < 0)
return ret;
ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xf7, 0x02);
if (ret < 0)
return ret;
ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xb0, 0x01);
if (ret < 0)
return ret;
ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xe2, 0x0f);
if (ret < 0)
return ret;
ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xb0, 0x00);
if (ret < 0)
return ret;
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0)
return ret;
ret = s6e63j0x03_apply_mtp_key(ctx, false);
if (ret < 0)
return ret;
return 0;
}
static int s6e63j0x03_prepare(struct drm_panel *panel)
{
struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel);
int ret;
ret = s6e63j0x03_power_on(ctx);
if (ret < 0)
return ret;
ret = s6e63j0x03_panel_init(ctx);
if (ret < 0)
goto err;
ctx->bl_dev->props.power = BACKLIGHT_POWER_REDUCED;
return 0;
err:
s6e63j0x03_power_off(ctx);
return ret;
}
static int s6e63j0x03_enable(struct drm_panel *panel)
{
struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int ret;
msleep(120);
ret = s6e63j0x03_apply_mtp_key(ctx, true);
if (ret < 0)
return ret;
ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xb1, 0x00, 0x09);
if (ret < 0)
return ret;
ret = s6e63j0x03_dcs_write_seq_static(ctx,
MIPI_DCS_SET_ADDRESS_MODE, 0x40);
if (ret < 0)
return ret;
ret = mipi_dsi_dcs_set_display_brightness(dsi, 0x00ff);
if (ret < 0)
return ret;
ret = s6e63j0x03_dcs_write_seq_static(ctx,
MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
if (ret < 0)
return ret;
ret = s6e63j0x03_dcs_write_seq_static(ctx,
MIPI_DCS_WRITE_POWER_SAVE, 0x00);
if (ret < 0)
return ret;
ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
if (ret < 0)
return ret;
ret = s6e63j0x03_apply_mtp_key(ctx, false);
if (ret < 0)
return ret;
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret < 0)
return ret;
ctx->bl_dev->props.power = BACKLIGHT_POWER_ON;
return 0;
}
static int s6e63j0x03_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);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(connector, mode);
connector->display_info.width_mm = 29;
connector->display_info.height_mm = 29;
return 1;
}
static const struct drm_panel_funcs s6e63j0x03_funcs = {
.disable = s6e63j0x03_disable,
.unprepare = s6e63j0x03_unprepare,
.prepare = s6e63j0x03_prepare,
.enable = s6e63j0x03_enable,
.get_modes = s6e63j0x03_get_modes,
};
static int s6e63j0x03_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct s6e63j0x03 *ctx;
int ret;
ctx = devm_drm_panel_alloc(dev, struct s6e63j0x03, panel,
&s6e63j0x03_funcs,
DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
mipi_dsi_set_drvdata(dsi, ctx);
ctx->dev = dev;
dsi->lanes = 1;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO_NO_HFP |
MIPI_DSI_MODE_VIDEO_NO_HBP | MIPI_DSI_MODE_VIDEO_NO_HSA;
ctx->supplies[0].supply = "vdd3";
ctx->supplies[1].supply = "vci";
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->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_LOW);
if (IS_ERR(ctx->reset_gpio))
return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
"cannot get reset-gpio\n");
ctx->panel.prepare_prev_first = true;
ctx->bl_dev = backlight_device_register("s6e63j0x03", dev, ctx,
&s6e63j0x03_bl_ops, NULL);
if (IS_ERR(ctx->bl_dev))
return dev_err_probe(dev, PTR_ERR(ctx->bl_dev),
"failed to register backlight device\n");
ctx->bl_dev->props.max_brightness = MAX_BRIGHTNESS;
ctx->bl_dev->props.brightness = DEFAULT_BRIGHTNESS;
ctx->bl_dev->props.power = BACKLIGHT_POWER_OFF;
drm_panel_add(&ctx->panel);
ret = mipi_dsi_attach(dsi);
if (ret < 0)
goto remove_panel;
return ret;
remove_panel:
drm_panel_remove(&ctx->panel);
backlight_device_unregister(ctx->bl_dev);
return ret;
}
static void s6e63j0x03_remove(struct mipi_dsi_device *dsi)
{
struct s6e63j0x03 *ctx = mipi_dsi_get_drvdata(dsi);
mipi_dsi_detach(dsi);
drm_panel_remove(&ctx->panel);
backlight_device_unregister(ctx->bl_dev);
}
static const struct of_device_id s6e63j0x03_of_match[] = {
{ .compatible = "samsung,s6e63j0x03" },
{ }
};
MODULE_DEVICE_TABLE(of, s6e63j0x03_of_match);
static struct mipi_dsi_driver s6e63j0x03_driver = {
.probe = s6e63j0x03_probe,
.remove = s6e63j0x03_remove,
.driver = {
.name = "panel_samsung_s6e63j0x03",
.of_match_table = s6e63j0x03_of_match,
},
};
module_mipi_dsi_driver(s6e63j0x03_driver);
MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
MODULE_AUTHOR("Hoegeun Kwon <hoegeun.kwon@samsung.com>");
MODULE_DESCRIPTION("MIPI-DSI based s6e63j0x03 AMOLED LCD Panel Driver");
MODULE_LICENSE("GPL v2");
