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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 | |
a0120245 | 46 | * @overflow: whether an overflow occured. |
9edbf1fa TV |
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; | |
a0120245 | 56 | bool opened, overflow; |
9edbf1fa TV |
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__ */ |