| Tomeu Vizoso | 9edbf1f | 2016-10-06 17:21:06 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright © 2016 Collabora Ltd. |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice shall be included in |
| 12 | * all copies or substantial portions of the Software. |
| 13 | * |
| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 18 | * 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 OR |
| 20 | * OTHER DEALINGS IN THE SOFTWARE. |
| 21 | */ |
| 22 | #ifndef __DRM_DEBUGFS_CRC_H__ |
| 23 | #define __DRM_DEBUGFS_CRC_H__ |
| 24 | |
| 25 | #define DRM_MAX_CRC_NR 10 |
| 26 | |
| 27 | /** |
| 28 | * struct drm_crtc_crc_entry - entry describing a frame's content |
| 29 | * @has_frame_counter: whether the source was able to provide a frame number |
| 30 | * @frame: number of the frame this CRC is about, if @has_frame_counter is true |
| 31 | * @crc: array of values that characterize the frame |
| 32 | */ |
| 33 | struct drm_crtc_crc_entry { |
| 34 | bool has_frame_counter; |
| 35 | uint32_t frame; |
| 36 | uint32_t crcs[DRM_MAX_CRC_NR]; |
| 37 | }; |
| 38 | |
| 39 | #define DRM_CRC_ENTRIES_NR 128 |
| 40 | |
| 41 | /** |
| 42 | * struct drm_crtc_crc - data supporting CRC capture on a given CRTC |
| 43 | * @lock: protects the fields in this struct |
| 44 | * @source: name of the currently configured source of CRCs |
| 45 | * @opened: whether userspace has opened the data file for reading |
| 46 | * @entries: array of entries, with size of %DRM_CRC_ENTRIES_NR |
| 47 | * @head: head of circular queue |
| 48 | * @tail: tail of circular queue |
| 49 | * @values_cnt: number of CRC values per entry, up to %DRM_MAX_CRC_NR |
| 50 | * @wq: workqueue used to synchronize reading and writing |
| 51 | */ |
| 52 | struct drm_crtc_crc { |
| 53 | spinlock_t lock; |
| 54 | const char *source; |
| 55 | bool opened; |
| 56 | struct drm_crtc_crc_entry *entries; |
| 57 | int head, tail; |
| 58 | size_t values_cnt; |
| 59 | wait_queue_head_t wq; |
| 60 | }; |
| 61 | |
| 62 | #if defined(CONFIG_DEBUG_FS) |
| 63 | int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame, |
| 64 | uint32_t frame, uint32_t *crcs); |
| 65 | #else |
| 66 | static inline int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame, |
| 67 | uint32_t frame, uint32_t *crcs) |
| 68 | { |
| 69 | return -EINVAL; |
| 70 | } |
| 71 | #endif /* defined(CONFIG_DEBUG_FS) */ |
| 72 | |
| 73 | #endif /* __DRM_DEBUGFS_CRC_H__ */ |