linux-kernel - Re: [PATCH v4 1/2] media: dt-bindings: mediatek: Rename child node names for decoder

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Date:   Fri, 25 Nov 2022 09:28:30 +0000
From:   Allen-KH Cheng (程冠勳) 
        <Allen-KH.Cheng@...iatek.com>
To:     "robh@...nel.org" <robh@...nel.org>,
        "krzysztof.kozlowski@...aro.org" <krzysztof.kozlowski@...aro.org>,
        "hverkuil@...all.nl" <hverkuil@...all.nl>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>
Subject: Re: [PATCH v4 1/2] media: dt-bindings: mediatek: Rename child node
 names for decoder

On Thu, 2022-11-24 at 12:09 +0100, Krzysztof Kozlowski wrote:
> On 24/11/2022 12:05, Hans Verkuil wrote:
> > Hi Krzysztof,
> > 
> > On 05/10/2022 13:58, Allen-KH Cheng (程冠勳) wrote:
> > > Hi Krzysztof,
> > > 
> > > On Wed, 2022-10-05 at 09:30 +0200, Krzysztof Kozlowski wrote:
> > > > On 05/10/2022 09:21, Allen-KH Cheng (程冠勳) wrote:
> > > > > Hi Rob,
> > > > > 
> > > > > On Fri, 2022-09-30 at 17:00 -0500, Rob Herring wrote:
> > > > > > On Fri, Sep 30, 2022 at 07:22:36PM +0800, Allen-KH Cheng
> > > > > > wrote:
> > > > > > > In order to make the names of the child nodes more
> > > > > > > generic, we
> > > > > > > rename
> > > > > > > "vcodec" to "video-codec" for decoder in
> > > > > > > patternProperties and
> > > > > > > example.
> > > > > > 
> > > > > > They are either generic or they aren't. Until something
> > > > > > generic
> > > > > > is 
> > > > > > defined, I don't think it's worth the churn to change.
> > > > > > 
> > > > > > 
> > > > > > > Signed-off-by: Allen-KH Cheng <
> > > > > > > allen-kh.cheng@...iatek.com>
> > > > > > > Reviewed-by: AngeloGioacchino Del Regno <
> > > > > > > angelogioacchino.delregno@...labora.com>
> > > > > > > ---
> > > > > > >  .../bindings/media/mediatek,vcodec-subdev-
> > > > > > > decoder.yaml    | 8
> > > > > > > ++++----
> > > > > > >  1 file changed, 4 insertions(+), 4 deletions(-)
> > > > > > > 
> > > > > > > diff --git
> > > > > > > a/Documentation/devicetree/bindings/media/mediatek,vcodec
> > > > > > > -
> > > > > > > subdev-
> > > > > > > decoder.yaml
> > > > > > > b/Documentation/devicetree/bindings/media/mediatek,vcodec
> > > > > > > -
> > > > > > > subdev-
> > > > > > > decoder.yaml
> > > > > > > index c4f20acdc1f8..67fde48f991c 100644
> > > > > > > ---
> > > > > > > a/Documentation/devicetree/bindings/media/mediatek,vcodec
> > > > > > > -
> > > > > > > subdev-decoder.yaml
> > > > > > > +++
> > > > > > > b/Documentation/devicetree/bindings/media/mediatek,vcodec
> > > > > > > -
> > > > > > > subdev-decoder.yaml
> > > > > > > @@ -91,7 +91,7 @@ properties:
> > > > > > >  
> > > > > > >  # Required child node:
> > > > > > >  patternProperties:
> > > > > > > -  '^vcodec-lat@[0-9a-f]+$':
> > > > > > > +  '^video-codec-lat@[0-9a-f]+$':
> > > > > > 
> > > > > > Just 'video-codec' doesn't work?
> > > > > > 
> > > > > 
> > > > > Thanks for your reply.
> > > > > 
> > > > > hmm, I think 'vidoe-codec' does wrok.
> > > > > 
> > > > > There are two seperate hardwares for the MTK video codec.
> > > > > codec-lat and codec-core.
> > > > > 
> > > > > Is it ok to keep two child node names for various hardwares?
> > > > > 
> > > > 
> > > > Aren't they still codecs?
> > > > 
> > > > Best regards,
> > > > Krzysztof
> > > 
> > > Yes, They are both hardware deocders. Lat is responsible for the
> > > bitstream and write the outcome to the lat buffer. Core will
> > > decode the
> > > lat buffer and write the outcome to the output buffer. Each frame
> > > will
> > > be decoded cyclically by these two hardware deocders.
> > 
> > So is this patch OK to be merged? Or do you still want changes?
> 
> The patch should be changed as Rob pointed out - use "video-codec"
> name.
> 
> Best regards,
> Krzysztof
> 

Ok, I will update this.

Thanks,
Allen