linux-kernel - Re: [PATCH] venus: vdec: fix decoded data size

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Message-ID: <bec2edfda26ecbac928871ad14d768790e3175a8.camel@ndufresne.ca>
Date:   Wed, 19 Sep 2018 11:53:25 -0400
From:   Nicolas Dufresne <nicolas@...fresne.ca>
To:     Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        Alexandre Courbot <acourbot@...omium.org>,
        Hans Verkuil <hverkuil@...all.nl>
Cc:     vgarodia@...eaurora.org,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        linux-arm-msm@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] venus: vdec: fix decoded data size

Le mercredi 19 septembre 2018 à 18:02 +0300, Stanimir Varbanov a
écrit :
> > --- a/drivers/media/platform/qcom/venus/vdec.c
> > +++ b/drivers/media/platform/qcom/venus/vdec.c
> > @@ -943,8 +943,7 @@ static void vdec_buf_done(struct venus_inst
> > *inst,
> > unsigned int buf_type,
> >                 unsigned int opb_sz =
> > venus_helper_get_opb_size(inst);
> > 
> >                 vb = &vbuf->vb2_buf;
> > -               vb->planes[0].bytesused =
> > -                       max_t(unsigned int, opb_sz, bytesused);
> > +                vb2_set_plane_payload(vb, 0, bytesused ? :
> > opb_sz);
> >                 vb->planes[0].data_offset = data_offset;
> >                 vb->timestamp = timestamp_us * NSEC_PER_USEC;
> >                 vbuf->sequence = inst->sequence_cap++;
> > 
> > It works fine for me, and should not return 0 more often than it
> > did
> > before (i.e. never). In practice I also never see the firmware
> > reporting a payload of zero on SDM845, but maybe older chips
> > differ?
> 
> yes, it looks fine. Let me test it with older versions.

What about removing the allow_zero_bytesused flag on this specific
queue ? Then you can leave it to 0, and the framework will change it to
the buffer size.

Nicolas

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