drivers/gpu/drm/panel/panel-jdi-fhd-r63452.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/panel/panel-jdi-fhd-r63452.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/panel/panel-jdi-fhd-r63452.c
Extension
.c
Size
7114 bytes
Lines
245
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 jdi_fhd_r63452 {
	struct drm_panel panel;
	struct mipi_dsi_device *dsi;
	struct gpio_desc *reset_gpio;
};

static inline struct jdi_fhd_r63452 *to_jdi_fhd_r63452(struct drm_panel *panel)
{
	return container_of(panel, struct jdi_fhd_r63452, panel);
}

static void jdi_fhd_r63452_reset(struct jdi_fhd_r63452 *ctx)
{
	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
	usleep_range(10000, 11000);
	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
	usleep_range(1000, 2000);
	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
	usleep_range(10000, 11000);
}

static int jdi_fhd_r63452_on(struct jdi_fhd_r63452 *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_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x00);
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd6, 0x01);
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xec,
					 0x64, 0xdc, 0xec, 0x3b, 0x52, 0x00, 0x0b, 0x0b,
					 0x13, 0x15, 0x68, 0x0b, 0xb5);
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x03);

	mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);

	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_SET_ADDRESS_MODE, 0x00);

	mipi_dsi_dcs_set_pixel_format_multi(&dsi_ctx, 0x77);
	mipi_dsi_dcs_set_column_address_multi(&dsi_ctx, 0x0000, 0x0437);
	mipi_dsi_dcs_set_page_address_multi(&dsi_ctx, 0x0000, 0x077f);
	mipi_dsi_dcs_set_tear_scanline_multi(&dsi_ctx, 0x0000);
	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_write_seq_multi(&dsi_ctx, MIPI_DCS_SET_CABC_MIN_BRIGHTNESS, 0x00);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x84, 0x00);

	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
	mipi_dsi_msleep(&dsi_ctx, 20);
	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
	mipi_dsi_msleep(&dsi_ctx, 80);

	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x04);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x84, 0x00);
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc8, 0x11);
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x03);

	return dsi_ctx.accum_err;
}

static void jdi_fhd_r63452_off(struct jdi_fhd_r63452 *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_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x00);
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd6, 0x01);
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xec,
					 0x64, 0xdc, 0xec, 0x3b, 0x52, 0x00, 0x0b, 0x0b,
					 0x13, 0x15, 0x68, 0x0b, 0x95);
	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x03);

	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
	mipi_dsi_usleep_range(&dsi_ctx, 2000, 3000);
	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
	mipi_dsi_msleep(&dsi_ctx, 120);
}

static int jdi_fhd_r63452_prepare(struct drm_panel *panel)
{
	struct jdi_fhd_r63452 *ctx = to_jdi_fhd_r63452(panel);
	int ret;

	jdi_fhd_r63452_reset(ctx);

Annotation

Implementation Notes