#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 <drm/display/drm_dsc.h>
#include <drm/display/drm_dsc_helper.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
struct rm692e5_panel {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
struct drm_dsc_config dsc;
struct regulator_bulk_data supplies[3];
struct gpio_desc *reset_gpio;
};
static inline struct rm692e5_panel *to_rm692e5_panel(struct drm_panel *panel)
{
return container_of(panel, struct rm692e5_panel, panel);
}
static void rm692e5_reset(struct rm692e5_panel *ctx)
{
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
usleep_range(10000, 11000);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(5000, 6000);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
usleep_range(10000, 11000);
}
static void rm692e5_on(struct mipi_dsi_multi_context *dsi_ctx)
{
dsi_ctx->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xfe, 0x41);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xd6, 0x00);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xfe, 0x16);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x8a, 0x87);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xfe, 0x71);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x82, 0x01);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xc6, 0x00);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xc7, 0x2c);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xc8, 0x64);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xc9, 0x3c);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xca, 0x80);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xcb, 0x02);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xcc, 0x02);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xfe, 0x38);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x18, 0x13);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xfe, 0xf4);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x00, 0xff);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x01, 0xff);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x02, 0xcf);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x03, 0xbc);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x04, 0xb9);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x05, 0x99);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x06, 0x02);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x07, 0x0a);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x08, 0xe0);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x09, 0x4c);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x0a, 0xeb);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x0b, 0xe8);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x0c, 0x32);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x0d, 0x07);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xfe, 0xf4);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x0d, 0xc0);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x0e, 0xff);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x0f, 0xff);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x10, 0x33);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x11, 0x6f);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x12, 0x6e);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x13, 0xa6);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x14, 0x80);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x15, 0x02);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x16, 0x38);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x17, 0xd3);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x18, 0x3a);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x19, 0xba);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x1a, 0xcc);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x1b, 0x01);
mipi_dsi_dcs_nop_multi(dsi_ctx);
mipi_dsi_msleep(dsi_ctx, 32);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xfe, 0x38);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x18, 0x13);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xfe, 0xd1);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xd3, 0x00);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xd0, 0x00);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xd2, 0x00);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xd4, 0x00);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xb4, 0x01);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xfe, 0xf9);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x00, 0xaf);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x1d, 0x37);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x44, 0x0a, 0x7b);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xfe, 0x00);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xfa, 0x01);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xc2, 0x08);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x35, 0x00);
mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x51, 0x05, 0x42);
mipi_dsi_dcs_exit_sleep_mode_multi(dsi_ctx);
mipi_dsi_msleep(dsi_ctx, 100);
mipi_dsi_dcs_set_display_on_multi(dsi_ctx);
}
static int rm692e5_disable(struct drm_panel *panel)
{
struct rm692e5_panel *ctx = to_rm692e5_panel(panel);
struct mipi_dsi_device *dsi = ctx->dsi;
struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xfe, 0x00);
mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 100);
return dsi_ctx.accum_err;
}
static int rm692e5_prepare(struct drm_panel *panel)
{
struct rm692e5_panel *ctx = to_rm692e5_panel(panel);
struct drm_dsc_picture_parameter_set pps;
struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
dsi_ctx.accum_err = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
if (dsi_ctx.accum_err)
return dsi_ctx.accum_err;
rm692e5_reset(ctx);
rm692e5_on(&dsi_ctx);
drm_dsc_pps_payload_pack(&pps, &ctx->dsc);
mipi_dsi_picture_parameter_set_multi(&dsi_ctx, &pps);
mipi_dsi_compression_mode_ext_multi(&dsi_ctx, true, MIPI_DSI_COMPRESSION_DSC, 0);
mipi_dsi_msleep(&dsi_ctx, 28);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xfe, 0x40);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbd, 0x05);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xfe, 0x00);
if (dsi_ctx.accum_err) {
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
}
return dsi_ctx.accum_err;
}
static int rm692e5_unprepare(struct drm_panel *panel)
{
struct rm692e5_panel *ctx = to_rm692e5_panel(panel);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
return 0;
}
static const struct drm_display_mode rm692e5_mode = {
.clock = (1224 + 32 + 8 + 8) * (2700 + 8 + 2 + 8) * 90 / 1000,
.hdisplay = 1224,
.hsync_start = 1224 + 32,
.hsync_end = 1224 + 32 + 8,
.htotal = 1224 + 32 + 8 + 8,
.vdisplay = 2700,
.vsync_start = 2700 + 8,
.vsync_end = 2700 + 8 + 2,
.vtotal = 2700 + 8 + 2 + 8,
.width_mm = 68,
.height_mm = 150,
};
static int rm692e5_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, &rm692e5_mode);
if (!mode)
return -ENOMEM;
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
drm_mode_probed_add(connector, mode);
return 1;
}
static const struct drm_panel_funcs rm692e5_panel_funcs = {
.prepare = rm692e5_prepare,
.unprepare = rm692e5_unprepare,
.disable = rm692e5_disable,
.get_modes = rm692e5_get_modes,
};
static int rm692e5_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 rm692e5_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 rm692e5_bl_ops = {
.update_status = rm692e5_bl_update_status,
.get_brightness = rm692e5_bl_get_brightness,
};
static struct backlight_device *
rm692e5_create_backlight(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
const struct backlight_properties props = {
.type = BACKLIGHT_RAW,
.brightness = 4095,
.max_brightness = 4095,
};
return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
&rm692e5_bl_ops, &props);
}
static int rm692e5_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct rm692e5_panel *ctx;
int ret;
ctx = devm_drm_panel_alloc(dev, struct rm692e5_panel, panel,
&rm692e5_panel_funcs,
DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
ctx->supplies[0].supply = "vddio";
ctx->supplies[1].supply = "dvdd";
ctx->supplies[2].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_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_NO_EOT_PACKET |
MIPI_DSI_CLOCK_NON_CONTINUOUS;
ctx->panel.prepare_prev_first = true;
ctx->panel.backlight = rm692e5_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);
dsi->dsc = &ctx->dsc;
ctx->dsc.dsc_version_major = 1;
ctx->dsc.dsc_version_minor = 1;
ctx->dsc.slice_height = 60;
ctx->dsc.slice_width = 1224;
ctx->dsc.slice_count = 1224 / ctx->dsc.slice_width;
ctx->dsc.bits_per_component = 8;
ctx->dsc.bits_per_pixel = 8 << 4;
ctx->dsc.block_pred_enable = true;
ret = mipi_dsi_attach(dsi);
if (ret < 0) {
dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
drm_panel_remove(&ctx->panel);
return ret;
}
return 0;
}
static void rm692e5_remove(struct mipi_dsi_device *dsi)
{
struct rm692e5_panel *ctx = mipi_dsi_get_drvdata(dsi);
int ret;
ret = mipi_dsi_detach(dsi);
if (ret < 0)
dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
drm_panel_remove(&ctx->panel);
}
static const struct of_device_id rm692e5_of_match[] = {
{ .compatible = "fairphone,fp5-rm692e5-boe" },
{ }
};
MODULE_DEVICE_TABLE(of, rm692e5_of_match);
static struct mipi_dsi_driver rm692e5_driver = {
.probe = rm692e5_probe,
.remove = rm692e5_remove,
.driver = {
.name = "panel-rm692e5-boe-amoled",
.of_match_table = rm692e5_of_match,
},
};
module_mipi_dsi_driver(rm692e5_driver);
MODULE_DESCRIPTION("DRM driver for rm692e5-equipped DSI panels");
MODULE_LICENSE("GPL");
