drivers/gpu/drm/sysfb/efidrm.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/sysfb/efidrm.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/sysfb/efidrm.c
Extension
.c
Size
11148 bytes
Lines
434
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 efidrm_device {
	struct drm_sysfb_device sysfb;

	/* modesetting */
	u32 formats[DRM_SYSFB_PLANE_NFORMATS(1)];
	struct drm_plane primary_plane;
	struct drm_crtc crtc;
	struct drm_encoder encoder;
	struct drm_connector connector;
};

/*
 * Modesetting
 */

static const u64 efidrm_primary_plane_format_modifiers[] = {
	DRM_SYSFB_PLANE_FORMAT_MODIFIERS,
};

static const struct drm_plane_helper_funcs efidrm_primary_plane_helper_funcs = {
	DRM_SYSFB_PLANE_HELPER_FUNCS,
};

static const struct drm_plane_funcs efidrm_primary_plane_funcs = {
	DRM_SYSFB_PLANE_FUNCS,
	.destroy = drm_plane_cleanup,
};

static const struct drm_crtc_helper_funcs efidrm_crtc_helper_funcs = {
	DRM_SYSFB_CRTC_HELPER_FUNCS,
};

static const struct drm_crtc_funcs efidrm_crtc_funcs = {
	DRM_SYSFB_CRTC_FUNCS,
	.destroy = drm_crtc_cleanup,
};

static const struct drm_encoder_funcs efidrm_encoder_funcs = {
	.destroy = drm_encoder_cleanup,
};

static const struct drm_connector_helper_funcs efidrm_connector_helper_funcs = {
	DRM_SYSFB_CONNECTOR_HELPER_FUNCS,
};

static const struct drm_connector_funcs efidrm_connector_funcs = {
	DRM_SYSFB_CONNECTOR_FUNCS,
	.destroy = drm_connector_cleanup,
};

static const struct drm_mode_config_funcs efidrm_mode_config_funcs = {
	DRM_SYSFB_MODE_CONFIG_FUNCS,
};

/*
 * Init / Cleanup
 */

static struct efidrm_device *efidrm_device_create(struct drm_driver *drv,
						  struct platform_device *pdev)
{
	const struct sysfb_display_info *dpy;
	const struct screen_info *si;
	const struct drm_format_info *format;
	int width, height, stride;
	u64 vsize, mem_flags;
	struct resource resbuf;
	struct resource *res;
	struct efidrm_device *efi;
	struct drm_sysfb_device *sysfb;
	struct drm_device *dev;
	struct resource *mem = NULL;
	struct drm_plane *primary_plane;
	struct drm_crtc *crtc;
	struct drm_encoder *encoder;
	struct drm_connector *connector;
	unsigned long max_width, max_height;
	size_t nformats;
	int ret;

	dpy = dev_get_platdata(&pdev->dev);
	if (!dpy)
		return ERR_PTR(-ENODEV);
	si = &dpy->screen;

	if (screen_info_video_type(si) != VIDEO_TYPE_EFI)
		return ERR_PTR(-ENODEV);

	/*
	 * EFI DRM driver

Annotation

Implementation Notes