#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <video/mipi_display.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
static const char * const regulator_names[] = {
"vddio",
"vddpos",
"vddneg",
};
static const unsigned long regulator_enable_loads[] = {
62000,
100000,
100000
};
struct ebbg_ft8719 {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
struct regulator_bulk_data supplies[ARRAY_SIZE(regulator_names)];
struct gpio_desc *reset_gpio;
};
static inline
struct ebbg_ft8719 *to_ebbg_ft8719(struct drm_panel *panel)
{
return container_of(panel, struct ebbg_ft8719, panel);
}
static void ebbg_ft8719_reset(struct ebbg_ft8719 *ctx)
{
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
usleep_range(4000, 5000);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(1000, 2000);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
usleep_range(15000, 16000);
}
static int ebbg_ft8719_on(struct ebbg_ft8719 *ctx)
{
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_dcs_set_display_brightness_multi(&dsi_ctx, 0x00ff);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x24);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 90);
mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
return dsi_ctx.accum_err;
}
static int ebbg_ft8719_off(struct ebbg_ft8719 *ctx)
{
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_dcs_set_display_off_multi(&dsi_ctx);
mipi_dsi_usleep_range(&dsi_ctx, 10000, 11000);
mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 90);
return dsi_ctx.accum_err;
}
static int ebbg_ft8719_prepare(struct drm_panel *panel)
{
struct ebbg_ft8719 *ctx = to_ebbg_ft8719(panel);
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
if (ret < 0)
return ret;
ebbg_ft8719_reset(ctx);
ret = ebbg_ft8719_on(ctx);
if (ret < 0) {
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
return ret;
}
return 0;
}
static int ebbg_ft8719_unprepare(struct drm_panel *panel)
{
struct ebbg_ft8719 *ctx = to_ebbg_ft8719(panel);
ebbg_ft8719_off(ctx);
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 ebbg_ft8719_mode = {
.clock = (1080 + 28 + 4 + 16) * (2246 + 120 + 4 + 12) * 60 / 1000,
.hdisplay = 1080,
.hsync_start = 1080 + 28,
.hsync_end = 1080 + 28 + 4,
.htotal = 1080 + 28 + 4 + 16,
.vdisplay = 2246,
.vsync_start = 2246 + 120,
.vsync_end = 2246 + 120 + 4,
.vtotal = 2246 + 120 + 4 + 12,
.width_mm = 68,
.height_mm = 141,
};
static int ebbg_ft8719_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, &ebbg_ft8719_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 ebbg_ft8719_panel_funcs = {
.prepare = ebbg_ft8719_prepare,
.unprepare = ebbg_ft8719_unprepare,
.get_modes = ebbg_ft8719_get_modes,
};
static int ebbg_ft8719_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct ebbg_ft8719 *ctx;
int i, ret;
ctx = devm_drm_panel_alloc(dev, struct ebbg_ft8719, panel,
&ebbg_ft8719_panel_funcs,
DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
for (i = 0; i < ARRAY_SIZE(ctx->supplies); i++)
ctx->supplies[i].supply = regulator_names[i];
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");
for (i = 0; i < ARRAY_SIZE(ctx->supplies); i++) {
ret = regulator_set_load(ctx->supplies[i].consumer,
regulator_enable_loads[i]);
if (ret)
return dev_err_probe(dev, ret,
"Failed to set regulator load\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 | MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_CLOCK_NON_CONTINUOUS;
ret = drm_panel_of_backlight(&ctx->panel);
if (ret)
return dev_err_probe(dev, ret, "Failed to get backlight\n");
drm_panel_add(&ctx->panel);
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 ebbg_ft8719_remove(struct mipi_dsi_device *dsi)
{
struct ebbg_ft8719 *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 ebbg_ft8719_of_match[] = {
{ .compatible = "ebbg,ft8719" },
{ }
};
MODULE_DEVICE_TABLE(of, ebbg_ft8719_of_match);
static struct mipi_dsi_driver ebbg_ft8719_driver = {
.probe = ebbg_ft8719_probe,
.remove = ebbg_ft8719_remove,
.driver = {
.name = "panel-ebbg-ft8719",
.of_match_table = ebbg_ft8719_of_match,
},
};
module_mipi_dsi_driver(ebbg_ft8719_driver);
MODULE_AUTHOR("Joel Selvaraj <jo@jsfamily.in>");
MODULE_DESCRIPTION("DRM driver for EBBG FT8719 video dsi panel");
MODULE_LICENSE("GPL v2");
