drivers/gpu/drm/panel/panel-startek-kd070fhfid015.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/panel/panel-startek-kd070fhfid015.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/panel/panel-startek-kd070fhfid015.c
Extension
.c
Size
8636 bytes
Lines
351
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct stk_panel {
	const struct drm_display_mode *mode;
	struct backlight_device *backlight;
	struct drm_panel base;
	struct gpio_desc *enable_gpio; /* Power IC supply enable */
	struct gpio_desc *reset_gpio; /* External reset */
	struct mipi_dsi_device *dsi;
	struct regulator_bulk_data supplies[2];
};

static inline struct stk_panel *to_stk_panel(struct drm_panel *panel)
{
	return container_of(panel, struct stk_panel, base);
}

static int stk_panel_init(struct stk_panel *stk)
{
	struct mipi_dsi_device *dsi = stk->dsi;
	struct mipi_dsi_multi_context dsi_ctx = {.dsi = dsi};

	mipi_dsi_dcs_soft_reset_multi(&dsi_ctx);
	mipi_dsi_msleep(&dsi_ctx, 5);
	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
	mipi_dsi_msleep(&dsi_ctx, 120);

	mipi_dsi_generic_write_seq_multi(&dsi_ctx, DSI_REG_MCAP, 0x04);

	/* Interface setting, video mode */
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, DSI_REG_IS, 0x14, 0x08, 0x00, 0x22, 0x00);
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, DSI_REG_IIS, 0x0c, 0x00);
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, DSI_REG_CTRL, 0x3a, 0xd3);

	mipi_dsi_dcs_set_display_brightness_multi(&dsi_ctx, 0x77);

	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY,
				     MIPI_DCS_WRITE_MEMORY_START);

	mipi_dsi_dcs_set_pixel_format_multi(&dsi_ctx, 0x77);
	mipi_dsi_dcs_set_column_address_multi(&dsi_ctx, 0, stk->mode->hdisplay - 1);
	mipi_dsi_dcs_set_page_address_multi(&dsi_ctx, 0, stk->mode->vdisplay - 1);

	return dsi_ctx.accum_err;
}

static int stk_panel_on(struct stk_panel *stk)
{
	struct mipi_dsi_device *dsi = stk->dsi;
	struct mipi_dsi_multi_context dsi_ctx = {.dsi = dsi};

	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);

	mipi_dsi_msleep(&dsi_ctx, 20);

	return dsi_ctx.accum_err;
}

static void stk_panel_off(struct stk_panel *stk)
{
	struct mipi_dsi_device *dsi = stk->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_dcs_enter_sleep_mode_multi(&dsi_ctx);

	mipi_dsi_msleep(&dsi_ctx, 100);
}

static int stk_panel_unprepare(struct drm_panel *panel)
{
	struct stk_panel *stk = to_stk_panel(panel);

	stk_panel_off(stk);
	regulator_bulk_disable(ARRAY_SIZE(stk->supplies), stk->supplies);
	gpiod_set_value(stk->reset_gpio, 0);
	gpiod_set_value(stk->enable_gpio, 1);

	return 0;
}

static int stk_panel_prepare(struct drm_panel *panel)
{
	struct stk_panel *stk = to_stk_panel(panel);
	int ret;

	gpiod_set_value(stk->reset_gpio, 0);
	gpiod_set_value(stk->enable_gpio, 0);
	ret = regulator_enable(stk->supplies[IOVCC].consumer);
	if (ret < 0)

Annotation

Implementation Notes