[PATCH] drm/drm_debugfs_crc.c: Document that .verify_crc_source vfunc is required for enabling CRC support.

[Liviu Dudau]

drm_debugfs_crtc_crc_add() function checks that both .set_crc_source and
.verify_crc_source hooks are provided before enabling debugfs support for
reading per-frame CRC data. Make that explicit in the documentation.

Cc: Daniel Vetter <daniel at ffwll.ch>
Signed-off-by: Liviu Dudau <liviu.dudau at arm.com>
---
 drivers/gpu/drm/drm_debugfs_crc.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_debugfs_crc.c b/drivers/gpu/drm/drm_debugfs_crc.c
index 7ca486d750e9..6604ed223160 100644
--- a/drivers/gpu/drm/drm_debugfs_crc.c
+++ b/drivers/gpu/drm/drm_debugfs_crc.c
@@ -66,9 +66,9 @@
  * the reported CRCs of frames that should have the same contents.
  *
  * On the driver side the implementation effort is minimal, drivers only need to
- * implement &drm_crtc_funcs.set_crc_source. The debugfs files are automatically
- * set up if that vfunc is set. CRC samples need to be captured in the driver by
- * calling drm_crtc_add_crc_entry().
+ * implement &drm_crtc_funcs.set_crc_source and &drm_crtc_funcs.verify_crc_source.
+ * The debugfs files are automatically set up if those vfuncs are set. CRC samples
+ * need to be captured in the driver by calling drm_crtc_add_crc_entry().
  */
 
 static int crc_control_show(struct seq_file *m, void *data)
-- 
2.21.0