drm_debugfs_crc.h

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/*
 * Copyright © 2016 Collabora Ltd.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */
#ifndef __DRM_DEBUGFS_CRC_H__
#define __DRM_DEBUGFS_CRC_H__
 
#include <linux/spinlock_types.h>
#include <linux/types.h>
#include <linux/wait.h>
 
struct drm_crtc;
 
#define DRM_MAX_CRC_NR      10
 
struct drm_crtc_crc_entry {
    bool has_frame_counter;
    uint32_t frame;
    uint32_t crcs[DRM_MAX_CRC_NR];
};
 
#define DRM_CRC_ENTRIES_NR  128
 
struct drm_crtc_crc {
    spinlock_t lock;
    const char *source;
    bool opened, overflow;
    struct drm_crtc_crc_entry *entries;
    int head, tail;
    size_t values_cnt;
    wait_queue_head_t wq;
};
 
#if defined(CONFIG_DEBUG_FS)
int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame,
               uint32_t frame, uint32_t *crcs);
#else
static inline int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame,
                     uint32_t frame, uint32_t *crcs)
{
    return -EINVAL;
}
#endif /* defined(CONFIG_DEBUG_FS) */
 
#endif /* __DRM_DEBUGFS_CRC_H__ */