Messages in this thread Patch in this message | | | Date | Fri, 9 Sep 2022 14:16:48 +0200 | Subject | Re: [PATCH] Allow S/G_PARM for stateful decoder | From | Hans Verkuil <> |
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Hi Dikshita,
First I'll comment on this patch, then at the end I have more high-level comments.
On 29/08/2022 09:54, Dikshita Agarwal wrote: > Some stateful decoder supports S/G_PARM similar to a
decoder -> decoders
BTW, which decoder drivers support this in mainline? Or is this for out-of-tree drivers?
> stateful encoder. S_PARM(OUTPUT) reserves hardware decoder > resources, and G_PARM(CAPTURE) returns the embedded > frame interval. Allow the same with this change. > > Signed-off-by: Dikshita Agarwal <quic_dikshita@quicinc.com> > --- > utils/v4l2-compliance/v4l2-test-formats.cpp | 4 ---- > 1 file changed, 4 deletions(-) > > diff --git a/utils/v4l2-compliance/v4l2-test-formats.cpp b/utils/v4l2-compliance/v4l2-test-formats.cpp > index 269a383..e996558 100644 > --- a/utils/v4l2-compliance/v4l2-test-formats.cpp > +++ b/utils/v4l2-compliance/v4l2-test-formats.cpp > @@ -64,8 +64,6 @@ static int testEnumFrameIntervals(struct node *node, __u32 pixfmt, > ret = doioctl(node, VIDIOC_ENUM_FRAMEINTERVALS, &frmival); > if (ret == ENOTTY) > return ret; > - // M2M devices don't support this, except for stateful encoders > - fail_on_test(node->is_m2m && !(node->codec_mask & STATEFUL_ENCODER));
M2M devices still don't support this, except for stateful codecs. So this test should still be there, just changed to:
!(node->codec_mask & (STATEFUL_ENCODER | STATEFUL_DECODER))
> if (f == 0 && ret == EINVAL) { > if (type == V4L2_FRMSIZE_TYPE_DISCRETE) > warn("found framesize %dx%d, but no frame intervals\n", w, h); > @@ -1367,8 +1365,6 @@ static int testParmType(struct node *node, unsigned type) > } > if (ret == ENOTTY) > return ret; > - // M2M devices don't support this, except for stateful encoders > - fail_on_test(node->is_m2m && !is_stateful_enc);
Similar.
> if (ret == EINVAL) > return ENOTTY; > if (ret)
But modifying the utility is something you only do if the spec has first been updated. So the stateful decoder chapter needs to be modified so it explains how G/S_PARM shall be used. And ideally have at least one driver that supports it.
Regards,
Hans
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