linux-kernel - Re: [PATCH] media: venus: add support for key frame

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Date:   Fri, 12 Oct 2018 17:06:09 +0900
From:   Alexandre Courbot <acourbot@...omium.org>
To:     Stanimir Varbanov <stanimir.varbanov@...aro.org>
Cc:     mgottam@...eaurora.org, Hans Verkuil <hverkuil@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-arm-msm@...r.kernel.org, vgarodia@...eaurora.org
Subject: Re: [PATCH] media: venus: add support for key frame

On Fri, Oct 12, 2018 at 4:37 PM Stanimir Varbanov
<stanimir.varbanov@...aro.org> wrote:
>
> Hi Alex,
>
> On 10/12/2018 08:26 AM, Alexandre Courbot wrote:
> > On Tue, Oct 9, 2018 at 4:54 PM Malathi Gottam <mgottam@...eaurora.org> wrote:
> >>
> >> When client requests for a keyframe, set the property
> >> to hardware to generate the sync frame.
> >>
> >> Signed-off-by: Malathi Gottam <mgottam@...eaurora.org>
> >> ---
> >>  drivers/media/platform/qcom/venus/venc_ctrls.c | 13 +++++++++++++
> >>  1 file changed, 13 insertions(+)
> >>
> >> diff --git a/drivers/media/platform/qcom/venus/venc_ctrls.c b/drivers/media/platform/qcom/venus/venc_ctrls.c
> >> index 45910172..f332c8e 100644
> >> --- a/drivers/media/platform/qcom/venus/venc_ctrls.c
> >> +++ b/drivers/media/platform/qcom/venus/venc_ctrls.c
> >> @@ -81,6 +81,8 @@ static int venc_op_s_ctrl(struct v4l2_ctrl *ctrl)
> >>         struct venc_controls *ctr = &inst->controls.enc;
> >>         u32 bframes;
> >>         int ret;
> >> +       void *ptr;
> >> +       u32 ptype;
> >>
> >>         switch (ctrl->id) {
> >>         case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
> >> @@ -173,6 +175,14 @@ static int venc_op_s_ctrl(struct v4l2_ctrl *ctrl)
> >>
> >>                 ctr->num_b_frames = bframes;
> >>                 break;
> >> +       case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
> >> +               ptype = HFI_PROPERTY_CONFIG_VENC_REQUEST_SYNC_FRAME;
> >> +               ret = hfi_session_set_property(inst, ptype, ptr);
> >
> > The test bot already said it, but ptr is passed to
> > hfi_session_set_property() uninitialized. And as can be expected the
> > call returns -EINVAL on my board.
> >
> > Looking at other uses of HFI_PROPERTY_CONFIG_VENC_REQUEST_SYNC_FRAME I
> > see that the packet sent to the firmware does not have room for an
> > argument, so I tried to pass NULL but got the same result.
>
> yes, because pdata cannot be NULL. I'd suggest to make a pointer to
> struct hfi_enable and pass it to the set_property function.

FWIW I also tried doing this and got the same error, strange...