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media: coda: Add a V4L2 user for control error macroblocks count

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To avoid potentially overflowing the kernel logs in the case
of corrupted streams, this commit replaces an error message with
a per-stream counter to be read through a driver-specific
control.

Applications can read the per-stream accumulated
error macroblocks count.

The old error message is replaced by a rate-limited debug message.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Ezequiel Garcia 2020-11-04 18:43:11 +01:00 • committed by Mauro Carvalho Chehab
parent 8297ae5c29
commit b2d3bef1aa
4 changed files with 41 additions and 3 deletions
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6
include/uapi/linux/v4l2-controls.h
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@ -198,6 +198,12 @@ enum v4l2_colorfx {
*/
#define V4L2_CID_USER_ATMEL_ISC_BASE (V4L2_CID_USER_BASE + 0x10c0)
/*
* The base for the CODA driver controls.
* We reserve 16 controls for this driver.
*/
#define V4L2_CID_USER_CODA_BASE (V4L2_CID_USER_BASE + 0x10e0)
/* MPEG-class control IDs */
/* The MPEG controls are applicable to all codec controls
* and the 'MPEG' part of the define is historical */