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[media] hdmi: added unpack and logging functions for InfoFrames

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When receiving video it is very useful to be able to unpack the InfoFrames.
Logging is useful as well, both for transmitters and receivers.

Especially when implementing the VIDIOC_LOG_STATUS ioctl (supported by many
V4L2 drivers) for a receiver it is important to be able to easily log what
the InfoFrame contains. This greatly simplifies debugging.

Signed-off-by: Martin Bugge <marbugge@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Martin Bugge
2014-12-19 09:14:21 -03:00
committed by Mauro Carvalho Chehab
parent 05c80d75f1
commit 2c676f378e
2 changed files with 819 additions and 7 deletions
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4
include/linux/hdmi.h
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@@ -25,6 +25,7 @@
#define __LINUX_HDMI_H_
#include <linux/types.h>
#include <linux/device.h>
enum hdmi_infoframe_type {
HDMI_INFOFRAME_TYPE_VENDOR = 0x81,
@@ -327,5 +328,8 @@ union hdmi_infoframe {
ssize_t
hdmi_infoframe_pack(union hdmi_infoframe *frame, void *buffer, size_t size);
int hdmi_infoframe_unpack(union hdmi_infoframe *frame, void *buffer);
void hdmi_infoframe_log(const char *level, struct device *dev,
union hdmi_infoframe *frame);
#endif /* _DRM_HDMI_H */