1/* $NetBSD: drm_debugfs_crc.h,v 1.3 2021/12/19 00:46:00 riastradh Exp $ */ 2 3/* 4 * Copyright �� 2016 Collabora Ltd. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 */ 24#ifndef __DRM_DEBUGFS_CRC_H__ 25#define __DRM_DEBUGFS_CRC_H__ 26 27#include <linux/spinlock.h> 28 29struct drm_crtc; 30 31#define DRM_MAX_CRC_NR 10 32 33/** 34 * struct drm_crtc_crc_entry - entry describing a frame's content 35 * @has_frame_counter: whether the source was able to provide a frame number 36 * @frame: number of the frame this CRC is about, if @has_frame_counter is true 37 * @crc: array of values that characterize the frame 38 */ 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 128 46 47/** 48 * struct drm_crtc_crc - data supporting CRC capture on a given CRTC 49 * @lock: protects the fields in this struct 50 * @source: name of the currently configured source of CRCs 51 * @opened: whether userspace has opened the data file for reading 52 * @overflow: whether an overflow occured. 53 * @entries: array of entries, with size of %DRM_CRC_ENTRIES_NR 54 * @head: head of circular queue 55 * @tail: tail of circular queue 56 * @values_cnt: number of CRC values per entry, up to %DRM_MAX_CRC_NR 57 * @wq: workqueue used to synchronize reading and writing 58 */ 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#ifndef __NetBSD__ 67 wait_queue_head_t wq; 68#endif 69}; 70 71#if defined(CONFIG_DEBUG_FS) 72int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame, 73 uint32_t frame, uint32_t *crcs); 74#else 75static inline int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame, 76 uint32_t frame, uint32_t *crcs) 77{ 78 return -EINVAL; 79} 80#endif /* defined(CONFIG_DEBUG_FS) */ 81 82#endif /* __DRM_DEBUGFS_CRC_H__ */ 83