drivers/gpu/drm/panel/panel-novatek-nt37700f.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/panel/panel-novatek-nt37700f.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/panel/panel-novatek-nt37700f.c
Extension
.c
Size
8746 bytes
Lines
301
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 nt37700f_tianma {
	struct drm_panel panel;
	struct mipi_dsi_device *dsi;
	struct regulator *supply;
	struct gpio_desc *reset_gpio;
};

static inline
struct nt37700f_tianma *to_nt37700f_tianma(struct drm_panel *panel)
{
	return container_of(panel, struct nt37700f_tianma, panel);
}

static void nt37700f_tianma_reset(struct nt37700f_tianma *ctx)
{
	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
	usleep_range(1000, 2000);
	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
	usleep_range(10000, 11000);
}

#define nt37700f_tianma_panel_switch_page(ctx, page) \
	mipi_dsi_dcs_write_seq_multi((ctx), 0xf0, 0x55, 0xaa, 0x52, 0x08, (page))

static int nt37700f_tianma_on(struct nt37700f_tianma *ctx)
{
	struct mipi_dsi_device *dsi = ctx->dsi;
	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };

	nt37700f_tianma_panel_switch_page(&dsi_ctx, 0x00);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc0, 0x56);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xca, 0x52);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x6f, 0x06);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb5, 0x2b, 0x1a);
	nt37700f_tianma_panel_switch_page(&dsi_ctx, 0x01);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xcd, 0x04, 0x82);
	nt37700f_tianma_panel_switch_page(&dsi_ctx, 0x02);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xcc, 0x00);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xff, 0xaa, 0x55, 0xa5, 0x80);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x6f, 0x55);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf6, 0x00);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x6f, 0x56);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf6, 0x00);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xff, 0xaa, 0x55, 0xa5, 0x81);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x6f, 0x07);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf3, 0x07);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x6f, 0x05);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf3, 0x25);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x90, 0x01);

	mipi_dsi_dcs_set_column_address_multi(&dsi_ctx, 0x0000, 1080 - 1);
	mipi_dsi_dcs_set_page_address_multi(&dsi_ctx, 0x0000, 2160 - 1);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
	mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);

	nt37700f_tianma_panel_switch_page(&dsi_ctx, 0x00);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc0, 0x56);
	nt37700f_tianma_panel_switch_page(&dsi_ctx, 0x02);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xcd, 0x00);
	nt37700f_tianma_panel_switch_page(&dsi_ctx, 0x04);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xd0, 0x11, 0x64);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x6f, 0x09);
	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb1, 0x20);

	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
	mipi_dsi_msleep(&dsi_ctx, 120);
	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);

	return dsi_ctx.accum_err;
}

static int nt37700f_tianma_disable(struct drm_panel *panel)
{
	struct nt37700f_tianma *ctx = to_nt37700f_tianma(panel);
	struct mipi_dsi_device *dsi = ctx->dsi;
	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };

	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
	mipi_dsi_msleep(&dsi_ctx, 50);
	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
	mipi_dsi_msleep(&dsi_ctx, 100);

	return dsi_ctx.accum_err;
}

static int nt37700f_tianma_prepare(struct drm_panel *panel)
{
	struct nt37700f_tianma *ctx = to_nt37700f_tianma(panel);
	struct device *dev = &ctx->dsi->dev;
	int ret;

Annotation

Implementation Notes