linux-kernel - Re: [PATCH v4 07/15] media: mtk-vcodec: vdec: add media device if using stateless api

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Message-ID: <CAPBb6MUKtxCS=JbtBmvwwEovrN8NCtLmMGcTkozo_gnDMRsqHw@mail.gmail.com>
Date:   Thu, 13 May 2021 17:05:02 +0900
From:   Alexandre Courbot <acourbot@...omium.org>
To:     Hans Verkuil <hverkuil-cisco@...all.nl>
Cc:     Tiffany Lin <tiffany.lin@...iatek.com>,
        Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
        Rob Herring <robh+dt@...nel.org>,
        Yunfei Dong <yunfei.dong@...iatek.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH v4 07/15] media: mtk-vcodec: vdec: add media device if
 using stateless api

Hi Hans, thanks for the review!

On Thu, Apr 29, 2021 at 4:28 PM Hans Verkuil <hverkuil-cisco@...all.nl> wrote:
>
> On 27/04/2021 13:15, Alexandre Courbot wrote:
> > From: Yunfei Dong <yunfei.dong@...iatek.com>
> >
> > The stateless API requires a media device for issuing requests. Add one
> > if we are being instantiated as a stateless decoder.
>
> Why for the stateless decoder only? Why not create one for all?
>
> It's not a blocker, but I would recommend looking at this.

Would there be any use in creating a media device for a stateful
decoder that does not need to use requests?

Cheers,
Alex.