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media: iris: Add encoder support for V4L2 event subscription

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Implement support for V4L2 event subscription on the encoder device by
handling the SUBSCRIBE_EVENT and UNSUBSCRIBE_EVENT ioctls with the
necessary hooks.

This enables userspace applications to subscribe to V4L2 events,
allowing asynchronous notification mechanisms.

Tested-by: Vikash Garodia <quic_vgarodia@quicinc.com> # X1E80100
Reviewed-by: Vikash Garodia <quic_vgarodia@quicinc.com>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-HDK
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-HDK
Signed-off-by: Dikshita Agarwal <quic_dikshita@quicinc.com>
Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> # x1e80100-crd
Signed-off-by: Bryan O'Donoghue <bod@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
This commit is contained in:
Dikshita Agarwal 2025-08-25 12:30:42 +05:30 committed by Hans Verkuil
parent 87551d96e8
commit f4d3867e05
3 changed files with 23 additions and 1 deletions
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14
drivers/media/platform/qcom/iris/iris_venc.c
View File

@ -3,6 +3,7 @@
* Copyright (c) 2022-2025 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include <media/v4l2-event.h>
#include <media/v4l2-mem2mem.h>
#include "iris_buffer.h"
@ -286,3 +287,16 @@ int iris_venc_validate_format(struct iris_inst *inst, u32 pixelformat)
return 0;
}
int iris_venc_subscribe_event(struct iris_inst *inst,
const struct v4l2_event_subscription *sub)
{
switch (sub->type) {
case V4L2_EVENT_EOS:
return v4l2_event_subscribe(&inst->fh, sub, 0, NULL);
case V4L2_EVENT_CTRL:
return v4l2_ctrl_subscribe_event(&inst->fh, sub);
default:
return -EINVAL;
}
}

1
drivers/media/platform/qcom/iris/iris_venc.h
View File

@ -14,5 +14,6 @@ int iris_venc_enum_fmt(struct iris_inst *inst, struct v4l2_fmtdesc *f);
int iris_venc_try_fmt(struct iris_inst *inst, struct v4l2_format *f);
int iris_venc_s_fmt(struct iris_inst *inst, struct v4l2_format *f);
int iris_venc_validate_format(struct iris_inst *inst, u32 pixelformat);
int iris_venc_subscribe_event(struct iris_inst *inst, const struct v4l2_event_subscription *sub);
#endif

9
drivers/media/platform/qcom/iris/iris_vidc.c
View File

@ -487,7 +487,12 @@ static int iris_subscribe_event(struct v4l2_fh *fh, const struct v4l2_event_subs
{
struct iris_inst *inst = container_of(fh, struct iris_inst, fh);
return iris_vdec_subscribe_event(inst, sub);
if (inst->domain == DECODER)
return iris_vdec_subscribe_event(inst, sub);
else if (inst->domain == ENCODER)
return iris_venc_subscribe_event(inst, sub);
return -EINVAL;
}
static int iris_dec_cmd(struct file *filp, void *fh,
@ -582,6 +587,8 @@ static const struct v4l2_ioctl_ops iris_v4l2_ioctl_ops_enc = {
.vidioc_enum_framesizes = iris_enum_framesizes,
.vidioc_enum_frameintervals = iris_enum_frameintervals,
.vidioc_querycap = iris_querycap,
.vidioc_subscribe_event = iris_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
void iris_init_ops(struct iris_core *core)