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media: cec: add support for Absolute Volume Control

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Add support for this new CEC message. This was added in HDMI 2.1a.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Hans Verkuil 2022-08-30 12:37:24 +02:00 • committed by Mauro Carvalho Chehab
parent 20694e96ca
commit 479747caa5
4 changed files with 19 additions and 0 deletions
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14
include/uapi/linux/cec-funcs.h
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@ -1568,6 +1568,20 @@ static inline void cec_ops_request_short_audio_descriptor(const struct cec_msg *
}
}
static inline void cec_msg_set_audio_volume_level(struct cec_msg *msg,
__u8 audio_volume_level)
{
msg->len = 3;
msg->msg[1] = CEC_MSG_SET_AUDIO_VOLUME_LEVEL;
msg->msg[2] = audio_volume_level;
}
static inline void cec_ops_set_audio_volume_level(const struct cec_msg *msg,
__u8 *audio_volume_level)
{
*audio_volume_level = msg->msg[2];
}
/* Audio Rate Control Feature */
static inline void cec_msg_set_audio_rate(struct cec_msg *msg,