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 | * @overflow: whether an overflow occured. |
47 | * @entries: array of entries, with size of %DRM_CRC_ENTRIES_NR |
48 | * @head: head of circular queue |
49 | * @tail: tail of circular queue |
50 | * @values_cnt: number of CRC values per entry, up to %DRM_MAX_CRC_NR |
51 | * @wq: workqueue used to synchronize reading and writing |
52 | */ |
53 | struct drm_crtc_crc { |
54 | spinlock_t lock; |
55 | const char *source; |
56 | bool opened, overflow; |
57 | struct drm_crtc_crc_entry *entries; |
58 | int head, tail; |
59 | size_t values_cnt; |
60 | wait_queue_head_t wq; |
61 | }; |
62 | |
63 | #if defined(CONFIG_DEBUG_FS) |
64 | int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame, |
65 | uint32_t frame, uint32_t *crcs); |
66 | #else |
67 | static inline int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame, |
68 | uint32_t frame, uint32_t *crcs) |
69 | { |
70 | return -EINVAL; |
71 | } |
72 | #endif /* defined(CONFIG_DEBUG_FS) */ |
73 | |
74 | #endif /* __DRM_DEBUGFS_CRC_H__ */ |
75 | |