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media: include/uapi/linux/cec*.h: add CEC LIP support

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Add support for the new Latency Indication Protocol feature.

This adds the opcodes and the wrapper functions.

Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Link: https://patch.msgid.link/8dac7c99b7eab4fcc11d76d50dd08fb4448672f4.1779115235.git.hverkuil+cisco@kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Message-ID: <8dac7c99b7eab4fcc11d76d50dd08fb4448672f4.1779115235.git.hverkuil+cisco@kernel.org>
This commit is contained in:
Hans Verkuil 2026-05-18 16:40:32 +02:00 committed by Mauro Carvalho Chehab
parent a1db83cc6f
commit 65efd1314d
2 changed files with 206 additions and 0 deletions
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182
include/uapi/linux/cec-funcs.h
View File

@ -1701,6 +1701,188 @@ static inline void cec_ops_request_current_latency(const struct cec_msg *msg,
}
/* Latency Indication Protocol Feature */
/* Only for CEC 2.0 and up */
static inline void cec_msg_request_lip_support(struct cec_msg *msg,
int reply, __u16 phys_addr)
{
msg->len = 4;
msg->msg[1] = CEC_MSG_REQUEST_LIP_SUPPORT;
msg->msg[2] = phys_addr >> 8;
msg->msg[3] = phys_addr & 0xff;
msg->reply = reply ? CEC_MSG_REPORT_LIP_SUPPORT : 0;
}
static inline void cec_ops_request_lip_support(const struct cec_msg *msg,
__u16 *phys_addr)
{
*phys_addr = (msg->msg[2] << 8) | msg->msg[3];
}
static inline void cec_msg_report_lip_support(struct cec_msg *msg, __u32 sqid)
{
msg->len = 6;
msg->msg[1] = CEC_MSG_REPORT_LIP_SUPPORT;
msg->msg[2] = sqid >> 24;
msg->msg[3] = (sqid >> 16) & 0xff;
msg->msg[4] = (sqid >> 8) & 0xff;
msg->msg[5] = sqid & 0xff;
}
static inline void cec_ops_report_lip_support(const struct cec_msg *msg,
__u32 *sqid)
{
*sqid = (msg->msg[2] << 24) | (msg->msg[3] << 16) |
(msg->msg[4] << 8) | msg->msg[5];
}
static inline void cec_msg_request_audio_and_video_latency(struct cec_msg *msg,
int reply, __u8 video_format,
__u8 hdr_format, __u8 vrr_format,
__u8 audio_format,
__u8 audio_format_extension)
{
msg->len = 6;
msg->msg[1] = CEC_MSG_REQUEST_AUDIO_AND_VIDEO_LATENCY;
msg->msg[2] = video_format;
msg->msg[3] = hdr_format;
msg->msg[4] = vrr_format;
msg->msg[5] = audio_format;
if (audio_format >= 1 && audio_format <= 31) {
msg->msg[6] = audio_format_extension;
msg->len++;
}
msg->reply = reply ? CEC_MSG_REPORT_AUDIO_AND_VIDEO_LATENCY : 0;
}
static inline void cec_ops_request_audio_and_video_latency(const struct cec_msg *msg,
__u8 *video_format,
__u8 *hdr_format,
__u8 *vrr_format,
__u8 *audio_format,
__u8 *audio_format_extension)
{
*video_format = msg->msg[2];
*hdr_format = msg->msg[3];
*vrr_format = msg->msg[4];
*audio_format = msg->msg[5];
*audio_format_extension = msg->len > 6 ? msg->msg[6] : 0;
}
static inline void cec_msg_report_audio_and_video_latency(struct cec_msg *msg,
__u16 video_latency,
__u16 audio_latency)
{
msg->len = 6;
msg->msg[1] = CEC_MSG_REPORT_AUDIO_AND_VIDEO_LATENCY;
msg->msg[2] = video_latency >> 8;
msg->msg[3] = video_latency & 0xff;
msg->msg[4] = audio_latency >> 8;
msg->msg[5] = audio_latency & 0xff;
}
static inline void cec_ops_report_audio_and_video_latency(const struct cec_msg *msg,
__u16 *video_latency,
__u16 *audio_latency)
{
*video_latency = (msg->msg[2] << 8) | msg->msg[3];
*audio_latency = (msg->msg[4] << 8) | msg->msg[5];
}
static inline void cec_msg_request_audio_latency(struct cec_msg *msg,
int reply,
__u8 audio_format,
__u8 audio_format_extension)
{
msg->len = 3;
msg->msg[1] = CEC_MSG_REQUEST_AUDIO_LATENCY;
msg->msg[2] = audio_format;
if (audio_format >= 1 && audio_format <= 31) {
msg->msg[3] = audio_format_extension;
msg->len++;
}
msg->reply = reply ? CEC_MSG_REPORT_AUDIO_LATENCY : 0;
}
static inline void cec_ops_request_audio_latency(const struct cec_msg *msg,
__u8 *audio_format,
__u8 *audio_format_extension)
{
*audio_format = msg->msg[2];
*audio_format_extension = msg->len > 3 ? msg->msg[3] : 0;
}
static inline void cec_msg_report_audio_latency(struct cec_msg *msg,
__u16 audio_latency)
{
msg->len = 4;
msg->msg[1] = CEC_MSG_REPORT_AUDIO_LATENCY;
msg->msg[2] = audio_latency >> 8;
msg->msg[3] = audio_latency & 0xff;
}
static inline void cec_ops_report_audio_latency(const struct cec_msg *msg,
__u16 *audio_latency)
{
*audio_latency = (msg->msg[2] << 8) | msg->msg[3];
}
static inline void cec_msg_request_video_latency(struct cec_msg *msg,
int reply, __u8 video_format,
__u8 hdr_format,
__u8 vrr_format)
{
msg->len = 5;
msg->msg[1] = CEC_MSG_REQUEST_VIDEO_LATENCY;
msg->msg[2] = video_format;
msg->msg[3] = hdr_format;
msg->msg[4] = vrr_format;
msg->reply = reply ? CEC_MSG_REPORT_VIDEO_LATENCY : 0;
}
static inline void cec_ops_request_video_latency(const struct cec_msg *msg,
__u8 *video_format,
__u8 *hdr_format,
__u8 *vrr_format)
{
*video_format = msg->msg[2];
*hdr_format = msg->msg[3];
*vrr_format = msg->msg[4];
}
static inline void cec_msg_report_video_latency(struct cec_msg *msg,
__u16 video_latency)
{
msg->len = 4;
msg->msg[1] = CEC_MSG_REPORT_VIDEO_LATENCY;
msg->msg[2] = video_latency >> 8;
msg->msg[3] = video_latency & 0xff;
}
static inline void cec_ops_report_video_latency(const struct cec_msg *msg,
__u16 *video_latency)
{
*video_latency = (msg->msg[2] << 8) | msg->msg[3];
}
static inline void cec_msg_update_sqid(struct cec_msg *msg, __u32 sqid)
{
msg->len = 6;
msg->msg[1] = CEC_MSG_UPDATE_SQID;
msg->msg[2] = sqid >> 24;
msg->msg[3] = (sqid >> 16) & 0xff;
msg->msg[4] = (sqid >> 8) & 0xff;
msg->msg[5] = sqid & 0xff;
}
static inline void cec_ops_update_sqid(const struct cec_msg *msg,
__u32 *sqid)
{
*sqid = (msg->msg[2] << 24) | (msg->msg[3] << 16) |
(msg->msg[4] << 8) | msg->msg[5];
}
/* Capability Discovery and Control Feature */
static inline void cec_msg_cdc_hec_inquire_state(struct cec_msg *msg,
__u16 phys_addr1,

24
include/uapi/linux/cec.h
View File

@ -1104,6 +1104,30 @@ struct cec_event {
#define CEC_OP_AUD_OUT_COMPENSATED_PARTIAL_DELAY 3
/* Latency Indication Protocol Feature */
#define CEC_MSG_REQUEST_LIP_SUPPORT 0x50
#define CEC_MSG_REPORT_LIP_SUPPORT 0x51
#define CEC_MSG_REQUEST_AUDIO_AND_VIDEO_LATENCY 0x52
/* HDR Format Operand (hdr_format) */
#define CEC_OP_HDR_FORMAT_GAMMA_SDR 0
#define CEC_OP_HDR_FORMAT_GAMMA_HDR 1
#define CEC_OP_HDR_FORMAT_PQ 2
#define CEC_OP_HDR_FORMAT_HLG 3
#define CEC_OP_HDR_FORMAT_DYNAMIC_HDR_TYPE_1 8
#define CEC_OP_HDR_FORMAT_DYNAMIC_HDR_TYPE_2 9
#define CEC_OP_HDR_FORMAT_DYNAMIC_HDR_TYPE_4 11
#define CEC_OP_HDR_FORMAT_DV_SINK_LED 16
#define CEC_OP_HDR_FORMAT_DV_SOURCE_LED 17
#define CEC_OP_HDR_FORMAT_HDR10PLUS 24
#define CEC_OP_HDR_FORMAT_ETSI_TS_103_433 32
#define CEC_MSG_REPORT_AUDIO_AND_VIDEO_LATENCY 0x53
#define CEC_MSG_REQUEST_AUDIO_LATENCY 0x54
#define CEC_MSG_REPORT_AUDIO_LATENCY 0x55
#define CEC_MSG_REQUEST_VIDEO_LATENCY 0x56
#define CEC_MSG_REPORT_VIDEO_LATENCY 0x57
#define CEC_MSG_UPDATE_SQID 0x58
/* Capability Discovery and Control Feature */
#define CEC_MSG_CDC_MESSAGE 0xf8
/* Ethernet-over-HDMI: nobody ever does this... */