Re: [PATCH] media: mediatek: vcodec: Initialize decoder parameters after getting dec_capability

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On Mon, Jun 20, 2022 at 12:54 PM Chen-Yu Tsai <wenst@xxxxxxxxxxxx> wrote:
>
> On Sat, Jun 18, 2022 at 3:29 PM Yunfei Dong <yunfei.dong@xxxxxxxxxxxx> wrote:
> >
> > Need to get dec_capability from scp first, then initialize decoder
> > supported format and other parameters according to dec_capability value.
> >
> > Signed-off-by: Yunfei Dong <yunfei.dong@xxxxxxxxxxxx>
>
> Reviewed-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>
> Tested-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>
>
> Tested on MT8183 on mainline 20220617-next with the vcodec-dec DT node
> copied from the ChromeOS v5.10 kernel.
>
> This fixes an issue where the first attempt to enumerate formats on the
> device right after boot returns an empty list.

BTW, this should have a Fixes tag.

Either

Fixes: 7a7ae26fd458 ("media: mediatek: vcodec: support stateless VP8 decoding")

which looks like the first instance of when firmware capability really is
considered, or

Fixes: fd00d90330d1 ("media: mtk-vcodec: vdec: move stateful ops into
their own file")

which matches when ctx->dev->vdec_pdata->init_vdec_params(ctx) was first added.


ChenYu



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