| 1 | /* |
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| 2 | * Copyright © 2016 Collabora Ltd. |
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| 3 | * |
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| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 5 | * copy of this software and associated documentation files (the "Software"), |
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| 6 | * to deal in the Software without restriction, including without limitation |
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| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 9 | * Software is furnished to do so, subject to the following conditions: |
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| 10 | * |
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| 11 | * The above copyright notice and this permission notice shall be included in |
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| 12 | * all copies or substantial portions of the Software. |
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| 13 | * |
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| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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| 18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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| 19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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| 20 | * OTHER DEALINGS IN THE SOFTWARE. |
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| 21 | */ |
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| 22 | #ifndef __DRM_DEBUGFS_CRC_H__ |
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| 23 | #define __DRM_DEBUGFS_CRC_H__ |
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| 24 | |
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| 25 | #define DRM_MAX_CRC_NR 10 |
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| 26 | |
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| 27 | /** |
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| 28 | * struct drm_crtc_crc_entry - entry describing a frame's content |
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| 29 | * @has_frame_counter: whether the source was able to provide a frame number |
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| 30 | * @frame: number of the frame this CRC is about, if @has_frame_counter is true |
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| 31 | * @crc: array of values that characterize the frame |
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| 32 | */ |
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| 33 | struct drm_crtc_crc_entry { |
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| 34 | bool has_frame_counter; |
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| 35 | uint32_t frame; |
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| 36 | uint32_t crcs[DRM_MAX_CRC_NR]; |
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| 37 | }; |
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| 38 | |
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| 39 | #define DRM_CRC_ENTRIES_NR 128 |
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| 40 | |
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| 41 | /** |
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| 42 | * struct drm_crtc_crc - data supporting CRC capture on a given CRTC |
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| 43 | * @lock: protects the fields in this struct |
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| 44 | * @source: name of the currently configured source of CRCs |
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| 45 | * @opened: whether userspace has opened the data file for reading |
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| 46 | * @overflow: whether an overflow occured. |
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| 47 | * @entries: array of entries, with size of %DRM_CRC_ENTRIES_NR |
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| 48 | * @head: head of circular queue |
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| 49 | * @tail: tail of circular queue |
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| 50 | * @values_cnt: number of CRC values per entry, up to %DRM_MAX_CRC_NR |
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| 51 | * @wq: workqueue used to synchronize reading and writing |
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| 52 | */ |
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| 53 | struct drm_crtc_crc { |
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| 54 | spinlock_t lock; |
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| 55 | const char *source; |
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| 56 | bool opened, overflow; |
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| 57 | struct drm_crtc_crc_entry *entries; |
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| 58 | int head, tail; |
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| 59 | size_t values_cnt; |
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| 60 | wait_queue_head_t wq; |
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| 61 | }; |
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| 62 | |
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| 63 | #if defined(CONFIG_DEBUG_FS) |
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| 64 | int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame, |
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| 65 | uint32_t frame, uint32_t *crcs); |
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| 66 | #else |
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| 67 | static inline int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame, |
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| 68 | uint32_t frame, uint32_t *crcs) |
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| 69 | { |
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| 70 | return -EINVAL; |
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| 71 | } |
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| 72 | #endif /* defined(CONFIG_DEBUG_FS) */ |
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| 73 | |
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| 74 | #endif /* __DRM_DEBUGFS_CRC_H__ */ |
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| 75 | |
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