| 1 | |
| 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 | #include <linux/spinlock_types.h>
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| 26 | #include <linux/types.h>
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| 27 | #include <linux/wait.h>
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| 28 |
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| 29 | struct drm_crtc;
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| 30 |
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| 31 | #define DRM_MAX_CRC_NR 10
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| 32 |
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| 33 | |
| 34 | * struct drm_crtc_crc_entry - entry describing a frame's content
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| 35 | * @has_frame_counter: whether the source was able to provide a frame number
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| 36 | * @frame: number of the frame this CRC is about, if @has_frame_counter is true
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| 37 | * @crcs: array of values that characterize the frame
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| 38 |
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| 39 | struct drm_crtc_crc_entry {
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| 40 | bool has_frame_counter;
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| 41 | uint32_t frame;
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| 42 | uint32_t crcs[DRM_MAX_CRC_NR];
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| 43 | };
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| 44 |
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| 45 | #define DRM_CRC_ENTRIES_NR 128
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| 46 |
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| 47 | |
| 48 | * struct drm_crtc_crc - data supporting CRC capture on a given CRTC
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| 49 | * @lock: protects the fields in this struct
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| 50 | * @source: name of the currently configured source of CRCs
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| 51 | * @opened: whether userspace has opened the data file for reading
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| 52 | * @overflow: whether an overflow occurred
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| 53 | * @entries: array of entries, with size of %DRM_CRC_ENTRIES_NR
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| 54 | * @head: head of circular queue
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| 55 | * @tail: tail of circular queue
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| 56 | * @values_cnt: number of CRC values per entry, up to %DRM_MAX_CRC_NR
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| 57 | * @wq: workqueue used to synchronize reading and writing
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| 58 |
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| 59 | struct drm_crtc_crc {
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| 60 | spinlock_t lock;
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| 61 | const char *source;
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| 62 | bool opened, overflow;
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| 63 | struct drm_crtc_crc_entry *entries;
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| 64 | int head, tail;
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| 65 | size_t values_cnt;
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| 66 | wait_queue_head_t wq;
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| 67 | };
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| 68 |
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| 69 | #if defined(CONFIG_DEBUG_FS)
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| 70 | int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame,
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| 71 | uint32_t frame, uint32_t *crcs);
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| 72 | #else
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| 73 | static inline int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame,
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| 74 | uint32_t frame, uint32_t *crcs)
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| 75 | {
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| 76 | return -EINVAL;
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| 77 | }
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| 78 | #endif
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| 79 |
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| 80 | #endif
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