drivers/gpu/drm/panel/panel-samsung-ams581vf01.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/panel/panel-samsung-ams581vf01.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/panel/panel-samsung-ams581vf01.c
Extension
.c
Size
7603 bytes
Lines
284
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 ams581vf01 {
	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 ams581vf01_supplies[] = {
	{ .supply = "vdd3p3" },
	{ .supply = "vddio" },
	{ .supply = "vsn" },
	{ .supply = "vsp" },
};

static inline struct ams581vf01 *to_ams581vf01(struct drm_panel *panel)
{
	return container_of(panel, struct ams581vf01, panel);
}

static void ams581vf01_reset(struct ams581vf01 *ctx)
{
	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
	usleep_range(10000, 11000);
	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
	usleep_range(10000, 11000);
}

static int ams581vf01_on(struct ams581vf01 *ctx)
{
	struct mipi_dsi_device *dsi = ctx->dsi;
	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };

	/* Sleep Out, Wait 10ms */
	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
	usleep_range(10000, 11000);

	/* TE On */
	mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);

	/* MIC Setting */
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD, 0x5a, 0x5a); /* Unlock */
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xeb, 0x17,
					       0x41, 0x92,
					       0x0e, 0x10,
					       0x82, 0x5a);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD, 0xa5, 0xa5); /* Lock */

	/* Column & Page Address Setting */
	mipi_dsi_dcs_set_column_address_multi(&dsi_ctx, 0x0000, 0x0437);
	mipi_dsi_dcs_set_page_address_multi(&dsi_ctx, 0x0000, 0x0923);

	/* Brightness Setting */
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);

	/* Horizontal & Vertical sync Setting */
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD, 0x5a, 0x5a); /* Unlock */
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ACCESS_PROT_OFF, 0x09);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xe8, 0x11, 0x30);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD, 0xa5, 0xa5); /* Lock */
	mipi_dsi_msleep(&dsi_ctx, 110);

	/* Display On */
	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);

	return dsi_ctx.accum_err;
}

static void ams581vf01_off(struct ams581vf01 *ctx)
{
	struct mipi_dsi_device *dsi = ctx->dsi;
	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };

	/* Display Off & Sleep In */
	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
	mipi_dsi_msleep(&dsi_ctx, 20);
	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);

	/* VCI operating mode change */
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD, 0x5a, 0x5a); /* Unlock */
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ACCESS_PROT_OFF, 0x05);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf4, 0x01);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD, 0xa5, 0xa5);  /* Lock */

	mipi_dsi_msleep(&dsi_ctx, 120);
}

static int ams581vf01_prepare(struct drm_panel *panel)
{
	struct ams581vf01 *ctx = to_ams581vf01(panel);
	int ret;

Annotation

Implementation Notes