Hi Hans,
Thanks for the comments!
On 11/11/2016 01:39 PM, Hans Verkuil wrote:
> I made some comments about start_streaming in my review of patch 3/9, so
> I am not going to repeat that here.
Sure.
>
> On 11/07/2016 06:33 PM, Stanimir Varbanov wrote:
>> This consists of video decoder implementation plus decoder
>> controls.
>>
>> Signed-off-by: Stanimir Varbanov <stanimir.varba...@linaro.org>
>> ---
>> drivers/media/platform/qcom/venus/vdec.c | 1108
>> ++++++++++++++++++++++++
>> drivers/media/platform/qcom/venus/vdec.h | 32 +
>> drivers/media/platform/qcom/venus/vdec_ctrls.c | 197 +++++
>> 3 files changed, 1337 insertions(+)
>> create mode 100644 drivers/media/platform/qcom/venus/vdec.c
>> create mode 100644 drivers/media/platform/qcom/venus/vdec.h
>> create mode 100644 drivers/media/platform/qcom/venus/vdec_ctrls.c
>>
>> diff --git a/drivers/media/platform/qcom/venus/vdec.c
>> b/drivers/media/platform/qcom/venus/vdec.c
>> new file mode 100644
>> index 000000000000..3f0eba7e31dc
>> --- /dev/null
>> +++ b/drivers/media/platform/qcom/venus/vdec.c
>
> <snip>
>
>> +static int
>> +vdec_s_selection(struct file *file, void *fh, struct v4l2_selection *s)
>> +{
>> + struct venus_inst *inst = to_inst(file);
>> +
>> + if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
>> + s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
>> + return -EINVAL;
>> +
>> + switch (s->target) {
>> + case V4L2_SEL_TGT_CROP_BOUNDS:
>> + case V4L2_SEL_TGT_CROP_DEFAULT:
>> + case V4L2_SEL_TGT_CROP:
>> + return -EINVAL;
>> + case V4L2_SEL_TGT_COMPOSE_BOUNDS:
>> + case V4L2_SEL_TGT_COMPOSE_DEFAULT:
>> + case V4L2_SEL_TGT_COMPOSE_PADDED:
>> + return -EINVAL;
>> + case V4L2_SEL_TGT_COMPOSE:
>> + if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
>> + return -EINVAL;
>> + s->r.width = inst->out_width;
>> + s->r.height = inst->out_height;
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + s->r.top = 0;
>> + s->r.left = 0;
>> +
>> + return 0;
>> +}
>
> This can be simplified to just:
>
> if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
> s->target != V4L2_SEL_TGT_COMPOSE)
> return -EINVAL;
>
> // handle the remaining capture compose case
OK I will rewrite it.
>
>> +
>> +static int
>> +vdec_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *b)
>> +{
>> + struct vb2_queue *queue = to_vb2q(file, b->type);
>> +
>> + if (!queue)
>> + return -EINVAL;
>> +
>> + return vb2_reqbufs(queue, b);
>> +}
>
> Is there any reason why the v4l2_m2m_ioctl_reqbufs et al helper functions
> can't be used? I strongly recommend that, unless there is a specific reason
> why that won't work.
So that means I need to completely rewrite the v4l2 part and adopt it
for mem2mem device APIs.
If that is what you meant I can invest some time to make a estimation
what would be the changes and time needed. After that we can decide what
to do - take the driver as is and port it to mem2mem device APIs later
on or wait for the this transition to happen before merging.
--
regards,
Stan
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