drm_debugfs_crc.h 2.7 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374
  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. #define DRM_MAX_CRC_NR 10
  25. /**
  26. * struct drm_crtc_crc_entry - entry describing a frame's content
  27. * @has_frame_counter: whether the source was able to provide a frame number
  28. * @frame: number of the frame this CRC is about, if @has_frame_counter is true
  29. * @crc: array of values that characterize the frame
  30. */
  31. struct drm_crtc_crc_entry {
  32. bool has_frame_counter;
  33. uint32_t frame;
  34. uint32_t crcs[DRM_MAX_CRC_NR];
  35. };
  36. #define DRM_CRC_ENTRIES_NR 128
  37. /**
  38. * struct drm_crtc_crc - data supporting CRC capture on a given CRTC
  39. * @lock: protects the fields in this struct
  40. * @source: name of the currently configured source of CRCs
  41. * @opened: whether userspace has opened the data file for reading
  42. * @overflow: whether an overflow occured.
  43. * @entries: array of entries, with size of %DRM_CRC_ENTRIES_NR
  44. * @head: head of circular queue
  45. * @tail: tail of circular queue
  46. * @values_cnt: number of CRC values per entry, up to %DRM_MAX_CRC_NR
  47. * @wq: workqueue used to synchronize reading and writing
  48. */
  49. struct drm_crtc_crc {
  50. spinlock_t lock;
  51. const char *source;
  52. bool opened, overflow;
  53. struct drm_crtc_crc_entry *entries;
  54. int head, tail;
  55. size_t values_cnt;
  56. wait_queue_head_t wq;
  57. };
  58. #if defined(CONFIG_DEBUG_FS)
  59. int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame,
  60. uint32_t frame, uint32_t *crcs);
  61. #else
  62. static inline int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame,
  63. uint32_t frame, uint32_t *crcs)
  64. {
  65. return -EINVAL;
  66. }
  67. #endif /* defined(CONFIG_DEBUG_FS) */
  68. #endif /* __DRM_DEBUGFS_CRC_H__ */