drivers/gpu/drm/tiny/ili9341.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/tiny/ili9341.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/tiny/ili9341.c
Extension
.c
Size
9753 bytes
Lines
366
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 ili9341_device {
	struct mipi_dbi_dev dbidev;

	struct drm_plane plane;
	struct drm_crtc crtc;
	struct drm_encoder encoder;
	struct drm_connector connector;
};

static struct ili9341_device *to_ili9341_device(struct drm_device *dev)
{
	return container_of(drm_to_mipi_dbi_dev(dev), struct ili9341_device, dbidev);
}

static const u32 ili9341_plane_formats[] = {
	DRM_MIPI_DBI_PLANE_FORMATS,
};

static const u64 ili9341_plane_format_modifiers[] = {
	DRM_MIPI_DBI_PLANE_FORMAT_MODIFIERS,
};

static const struct drm_plane_helper_funcs ili9341_plane_helper_funcs = {
	DRM_MIPI_DBI_PLANE_HELPER_FUNCS,
};

static const struct drm_plane_funcs ili9341_plane_funcs = {
	DRM_MIPI_DBI_PLANE_FUNCS,
	.destroy = drm_plane_cleanup,
};

static void ili9341_crtc_helper_atomic_enable(struct drm_crtc *crtc,
					      struct drm_atomic_commit *state)
{
	struct drm_device *drm = crtc->dev;
	struct ili9341_device *ili9341 = to_ili9341_device(drm);
	struct mipi_dbi_dev *dbidev = &ili9341->dbidev;
	struct mipi_dbi *dbi = &dbidev->dbi;
	u8 addr_mode;
	int ret, idx;

	if (!drm_dev_enter(drm, &idx))
		return;

	DRM_DEBUG_KMS("\n");

	ret = mipi_dbi_poweron_conditional_reset(dbidev);
	if (ret < 0)
		goto out_exit;
	if (ret == 1)
		goto out_enable;

	mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);

	mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0xc1, 0x30);
	mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
	mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x00, 0x78);
	mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
	mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20);
	mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00);

	/* Power Control */
	mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x23);
	mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x10);
	/* VCOM */
	mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x3e, 0x28);
	mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0x86);

	/* Memory Access Control */
	mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);

	/* Frame Rate */
	mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b);

	/* Gamma */
	mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x00);
	mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
	mipi_dbi_command(dbi, ILI9341_PGAMCTRL,
			 0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1,
			 0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00);
	mipi_dbi_command(dbi, ILI9341_NGAMCTRL,
			 0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1,
			 0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f);

	/* DDRAM */
	mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07);

	/* Display */
	mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x08, 0x82, 0x27, 0x00);
	mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);

Annotation

Implementation Notes