linux-kernel - Re: [PATCH v4 1/3] dt-bindings: mediatek: Add a binding for Mediatek JPEG Decoder

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Date:   Tue, 8 Nov 2016 10:23:02 +0800
From:   Rick Chang <rick.chang@...iatek.com>
To:     Matthias Brugger <matthias.bgg@...il.com>
CC:     Hans Verkuil <hans.verkuil@...co.com>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        <linux-kernel@...r.kernel.org>, <linux-media@...r.kernel.org>,
        <srv_heupstream@...iatek.com>,
        <linux-mediatek@...ts.infradead.org>,
        Minghsiu Tsai <minghsiu.tsai@...iatek.com>
Subject: Re: [PATCH v4 1/3] dt-bindings: mediatek: Add a binding for
 Mediatek JPEG Decoder

Dear Matthias,

Thank you for your review.I will include your advice in patch v5.

On Mon, 2016-11-07 at 18:00 +0100, Matthias Brugger wrote:
> 
> On 07/11/16 07:57, Rick Chang wrote:
> > Add a DT binding documentation for Mediatek JPEG Decoder of
> > MT2701 SoC.
> >
> > Signed-off-by: Rick Chang <rick.chang@...iatek.com>
> > Signed-off-by: Minghsiu Tsai <minghsiu.tsai@...iatek.com>
> > ---
> >  .../bindings/media/mediatek-jpeg-codec.txt         | 35 ++++++++++++++++++++++
> >  1 file changed, 35 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/media/mediatek-jpeg-codec.txt
> >
> > diff --git a/Documentation/devicetree/bindings/media/mediatek-jpeg-codec.txt b/Documentation/devicetree/bindings/media/mediatek-jpeg-codec.txt
> > new file mode 100644
> > index 0000000..c7dbcc2
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/media/mediatek-jpeg-codec.txt
> > @@ -0,0 +1,35 @@
> > +* Mediatek JPEG Decoder
> > +
> > +Mediatek JPEG Decoder is the JPEG decode hardware present in Mediatek SoCs
> > +
> > +Required properties:
> > +- compatible : "mediatek,jpgdec"
> 
> Is this block in all arm SoCs from Mediatek?

JPEG Decoder hardware is in most of Mediatek SoCs, but I can't guarantee
that each of them has identical IP.

> If not, then I would prefer to use "mediatek,mtXXXX-jpgdec"
> where XXXX stands for the oldest model which has this block.
> 
> In parallel to that the dts should have this compatible plus the one for 
> mt2701, for example:
> compatible = "mediatek,mt2701-uart", "mediatek,mt6577-uart"

The oldest model that I can make sure this patch series work on is
mt8173.I will add it to the compatible string.

> Thanks,
> Matthias