81 lines · c
1/*2 * Copyright © 2016 Collabora Ltd.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR20 * OTHER DEALINGS IN THE SOFTWARE.21 */22#ifndef __DRM_DEBUGFS_CRC_H__23#define __DRM_DEBUGFS_CRC_H__24 25#include <linux/spinlock_types.h>26#include <linux/types.h>27#include <linux/wait.h>28 29struct drm_crtc;30 31#define DRM_MAX_CRC_NR 1032 33/**34 * struct drm_crtc_crc_entry - entry describing a frame's content35 * @has_frame_counter: whether the source was able to provide a frame number36 * @frame: number of the frame this CRC is about, if @has_frame_counter is true37 * @crcs: array of values that characterize the frame38 */39struct drm_crtc_crc_entry {40 bool has_frame_counter;41 uint32_t frame;42 uint32_t crcs[DRM_MAX_CRC_NR];43};44 45#define DRM_CRC_ENTRIES_NR 12846 47/**48 * struct drm_crtc_crc - data supporting CRC capture on a given CRTC49 * @lock: protects the fields in this struct50 * @source: name of the currently configured source of CRCs51 * @opened: whether userspace has opened the data file for reading52 * @overflow: whether an overflow occured.53 * @entries: array of entries, with size of %DRM_CRC_ENTRIES_NR54 * @head: head of circular queue55 * @tail: tail of circular queue56 * @values_cnt: number of CRC values per entry, up to %DRM_MAX_CRC_NR57 * @wq: workqueue used to synchronize reading and writing58 */59struct drm_crtc_crc {60 spinlock_t lock;61 const char *source;62 bool opened, overflow;63 struct drm_crtc_crc_entry *entries;64 int head, tail;65 size_t values_cnt;66 wait_queue_head_t wq;67};68 69#if defined(CONFIG_DEBUG_FS)70int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame,71 uint32_t frame, uint32_t *crcs);72#else73static inline int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame,74 uint32_t frame, uint32_t *crcs)75{76 return -EINVAL;77}78#endif /* defined(CONFIG_DEBUG_FS) */79 80#endif /* __DRM_DEBUGFS_CRC_H__ */81