linux-kernel - Re: [PATCH] dt-bindings: mxsfb: Exclude i.MX8MQ from power-domains requirement

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Date:   Thu, 10 Aug 2023 20:30:21 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Guido Günther <guido.gunther@...i.sm>
Cc:     David Heidelberg <david@...t.cz>, Marek Vasut <marex@...x.de>,
        Stefan Agner <stefan@...er.ch>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Liu Ying <victor.liu@....com>, kernel@...i.sm,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Rob Herring <robh@...nel.org>, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: mxsfb: Exclude i.MX8MQ from power-domains
 requirement

On Wed, Aug 02, 2023 at 11:51:17AM +0200, Guido Günther wrote:
> Hi,
> On Sun, Jul 30, 2023 at 09:41:20PM +0300, David Heidelberg wrote:
> > i.MX8MQ uses as secondary compatible fsl,imx6sx-lcdif, which triggers
> > requirement of power-domains, thou it's not required.
> > 
> > Fixes: f62678a77d58 ("dt-bindings: mxsfb: Document i.MX8M/i.MX6SX/i.MX6SL power-domains property")
> > 
> > Signed-off-by: David Heidelberg <david@...t.cz>
> > ---
> >  .../devicetree/bindings/display/fsl,lcdif.yaml        | 11 +++++++++--
> >  1 file changed, 9 insertions(+), 2 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/display/fsl,lcdif.yaml b/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
> > index fc11ab5fc465..2d868276b0f9 100644
> > --- a/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
> > +++ b/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
> > @@ -129,8 +129,15 @@ allOf:
> >                - fsl,imx8mp-lcdif
> >                - fsl,imx93-lcdif
> >      then:
> > -      required:
> > -        - power-domains
> > +      if:
> > +        properties:
> > +          compatible:
> > +            not:
> > +              contains:
> > +                const: fsl,imx8mq-lcdif
> > +      then:
> > +        required:
> > +          - power-domains
> 
> We currently enable the mipi power domain for the mipi dphy and nwl
> bridge only but not for LCDIF itself assuming it's not needed (as there's
> other outputs LCDIF can drive). I *think* this is correct but maybe
> Marek or Liu can confirm?

I'm happy to Ack this, but I've been sitting on it waiting to see if
Marek or Liu popped up..

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