linux-kernel - Re: [PATCH] media: mediatek: vcodec: Initialize decoder parameters after getting dec

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Date:   Mon, 20 Jun 2022 14:31:27 +0800
From:   "yunfei.dong@...iatek.com" <yunfei.dong@...iatek.com>
To:     Chen-Yu Tsai <wenst@...omium.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>
CC:     Nicolas Dufresne <nicolas@...fresne.ca>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        Tiffany Lin <tiffany.lin@...iatek.com>,
        Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Tomasz Figa <tfiga@...gle.com>,
        George Sun <george.sun@...iatek.com>,
        Xiaoyong Lu <xiaoyong.lu@...iatek.com>,
        "Hsin-Yi Wang" <hsinyi@...omium.org>,
        Fritz Koenig <frkoenig@...omium.org>,
        "Daniel Vetter" <daniel@...ll.ch>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        "Irui Wang" <irui.wang@...iatek.com>,
        Steve Cho <stevecho@...omium.org>,
        <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: Re: [PATCH] media: mediatek: vcodec: Initialize decoder parameters
 after getting dec_capability

Hi Chen-Yu,

Thanks for your suggestion.
On Mon, 2022-06-20 at 13:25 +0800, Chen-Yu Tsai wrote:
> On Mon, Jun 20, 2022 at 12:54 PM Chen-Yu Tsai <wenst@...omium.org>
> wrote:
> > 
> > On Sat, Jun 18, 2022 at 3:29 PM Yunfei Dong <
> > yunfei.dong@...iatek.com> 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@...iatek.com>
> > 
> > Reviewed-by: Chen-Yu Tsai <wenst@...omium.org>
> > Tested-by: Chen-Yu Tsai <wenst@...omium.org>
> > 
> > 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

I will fix the patch in v2.

Best Regards,
Yunfei Dong