forked from Minki/linux
74 lines
2.6 KiB
C
74 lines
2.6 KiB
C
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/*
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* Copyright © 2016 Collabora Ltd.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __DRM_DEBUGFS_CRC_H__
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#define __DRM_DEBUGFS_CRC_H__
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#define DRM_MAX_CRC_NR 10
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/**
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* struct drm_crtc_crc_entry - entry describing a frame's content
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* @has_frame_counter: whether the source was able to provide a frame number
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* @frame: number of the frame this CRC is about, if @has_frame_counter is true
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* @crc: array of values that characterize the frame
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*/
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struct drm_crtc_crc_entry {
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bool has_frame_counter;
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uint32_t frame;
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uint32_t crcs[DRM_MAX_CRC_NR];
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};
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#define DRM_CRC_ENTRIES_NR 128
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/**
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* struct drm_crtc_crc - data supporting CRC capture on a given CRTC
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* @lock: protects the fields in this struct
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* @source: name of the currently configured source of CRCs
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* @opened: whether userspace has opened the data file for reading
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* @entries: array of entries, with size of %DRM_CRC_ENTRIES_NR
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* @head: head of circular queue
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* @tail: tail of circular queue
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* @values_cnt: number of CRC values per entry, up to %DRM_MAX_CRC_NR
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* @wq: workqueue used to synchronize reading and writing
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*/
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struct drm_crtc_crc {
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spinlock_t lock;
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const char *source;
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bool opened;
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struct drm_crtc_crc_entry *entries;
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int head, tail;
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size_t values_cnt;
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wait_queue_head_t wq;
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};
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#if defined(CONFIG_DEBUG_FS)
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int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame,
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uint32_t frame, uint32_t *crcs);
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#else
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static inline int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame,
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uint32_t frame, uint32_t *crcs)
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{
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return -EINVAL;
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}
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#endif /* defined(CONFIG_DEBUG_FS) */
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#endif /* __DRM_DEBUGFS_CRC_H__ */
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