include/drm/drm_debugfs_crc.h

Source file repositories/reference/linux-study-clean/include/drm/drm_debugfs_crc.h

File Facts

System
Linux kernel
Corpus path
include/drm/drm_debugfs_crc.h
Extension
.h
Size
2826 bytes
Lines
81
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

struct drm_crtc_crc_entry {
	bool has_frame_counter;
	uint32_t frame;
	uint32_t crcs[DRM_MAX_CRC_NR];
};

#define DRM_CRC_ENTRIES_NR	128

/**
 * struct drm_crtc_crc - data supporting CRC capture on a given CRTC
 * @lock: protects the fields in this struct
 * @source: name of the currently configured source of CRCs
 * @opened: whether userspace has opened the data file for reading
 * @overflow: whether an overflow occurred
 * @entries: array of entries, with size of %DRM_CRC_ENTRIES_NR
 * @head: head of circular queue
 * @tail: tail of circular queue
 * @values_cnt: number of CRC values per entry, up to %DRM_MAX_CRC_NR
 * @wq: workqueue used to synchronize reading and writing
 */
struct drm_crtc_crc {
	spinlock_t lock;
	const char *source;
	bool opened, overflow;
	struct drm_crtc_crc_entry *entries;
	int head, tail;
	size_t values_cnt;
	wait_queue_head_t wq;
};

#if defined(CONFIG_DEBUG_FS)
int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame,
			   uint32_t frame, uint32_t *crcs);
#else
static inline int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame,
					 uint32_t frame, uint32_t *crcs)
{
	return -EINVAL;
}
#endif /* defined(CONFIG_DEBUG_FS) */

#endif /* __DRM_DEBUGFS_CRC_H__ */

Annotation

Implementation Notes