drivers/gpu/drm/panel/panel-boe-td4320.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/panel/panel-boe-td4320.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/panel/panel-boe-td4320.c
Extension
.c
Size
6855 bytes
Lines
248
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 boe_td4320 {
	struct drm_panel panel;
	struct mipi_dsi_device *dsi;
	struct regulator_bulk_data *supplies;
	struct gpio_desc *reset_gpio;
};

static const struct regulator_bulk_data boe_td4320_supplies[] = {
	{ .supply = "iovcc" },
	{ .supply = "vsn" },
	{ .supply = "vsp" },
};

static inline struct boe_td4320 *to_boe_td4320(struct drm_panel *panel)
{
	return container_of(panel, struct boe_td4320, panel);
}

static void boe_td4320_reset(struct boe_td4320 *ctx)
{
	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
	usleep_range(1000, 2000);
	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
	usleep_range(5000, 6000);
	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
	msleep(30);
}

static int boe_td4320_on(struct boe_td4320 *ctx)
{
	struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };

	ctx->dsi->mode_flags |= MIPI_DSI_MODE_LPM;

	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x04);
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd6, 0x00);
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb8,
					 0x19, 0x55, 0x00, 0xbe, 0x00, 0x00,
					 0x00);
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9,
					 0x4d, 0x55, 0x05, 0xe6, 0x00, 0x02,
					 0x03);
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba,
					 0x9b, 0x5b, 0x07, 0xe6, 0x00, 0x13,
					 0x00);
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf9,
					 0x44, 0x3f, 0x00, 0x8d, 0xbf);
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xce,
					 0x5d, 0x00, 0x0f, 0x1f, 0x2f, 0x3f,
					 0x4f, 0x5f, 0x6f, 0x7f, 0x8f, 0x9f,
					 0xaf, 0xbf, 0xcf, 0xdf, 0xef, 0xff,
					 0x04, 0x00, 0x02, 0x02, 0x42, 0x01,
					 0x69, 0x5a, 0x40, 0x40, 0x00, 0x00,
					 0x04, 0xfa, 0x00);
	mipi_dsi_dcs_set_display_brightness_multi(&dsi_ctx, 0x00b8);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY,
				     0x2c);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x03);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x11, 0x00);
	mipi_dsi_msleep(&dsi_ctx, 96);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x29, 0x00);
	mipi_dsi_msleep(&dsi_ctx, 20);

	return dsi_ctx.accum_err;
}

static int boe_td4320_off(struct boe_td4320 *ctx)
{
	struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };

	ctx->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;

	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
	mipi_dsi_msleep(&dsi_ctx, 20);
	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
	mipi_dsi_msleep(&dsi_ctx, 120);

	return dsi_ctx.accum_err;
}

static int boe_td4320_prepare(struct drm_panel *panel)
{
	struct boe_td4320 *ctx = to_boe_td4320(panel);
	struct device *dev = &ctx->dsi->dev;
	int ret;

	ret = regulator_bulk_enable(ARRAY_SIZE(boe_td4320_supplies), ctx->supplies);
	if (ret < 0) {
		dev_err(dev, "Failed to enable regulators: %d\n", ret);

Annotation

Implementation Notes