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Message-ID: <YO6hIzlOuMsDXztW@pendragon.ideasonboard.com>
Date: Wed, 14 Jul 2021 11:32:35 +0300
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Xin Ji <xji@...logixsemi.com>
Cc: Robert Foss <robert.foss@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
David Airlie <airlied@...ux.ie>,
Nicolas Boichat <drinkcat@...gle.com>,
Hsin-Yi Wang <hsinyi@...omium.org>,
Daniel Vetter <daniel@...ll.ch>,
Sam Ravnborg <sam@...nborg.org>,
Maxime Ripard <mripard@...nel.org>,
Mark Brown <broonie@...nel.org>,
Ricardo Cañuelo <ricardo.canuelo@...labora.com>,
dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
Bernie Liang <bliang@...logixsemi.com>,
Sheng Pan <span@...logixsemi.com>,
Zhen Li <zhenli@...logixsemi.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v9 1/4] dt-bindings:drm/bridge:anx7625:add vendor define
flags
Hi Xin,
On Wed, Jul 07, 2021 at 03:30:51PM +0800, Xin Ji wrote:
> On Thu, Jun 24, 2021 at 01:57:22PM +0200, Robert Foss wrote:
> > Hey Xin,
> >
> > I would like to merge this series now, but this patch needs a review
> > first. Maybe Laurent/Rob Herring are good candidates.
>
> Hi Rob, I get Laurent/Rob comments before, and explained why we needs
> these DT properties, so far, I didn't get any response.
>
> Hi Rob Herring and Laurent, for the DT property lane0/1-swing, Google
> engineer has strong demond for them, they don't want to move DP swing
> adjusting to kernel, thus may cause change the driver code in each
> project, so config them in DT is a best option.
Hardcoding it in the driver is certainly not a good option, but
hardcoding it in DT isn't either unless you can explain how the value
should be computed. "Contact the vendor" isn't good enough.
> > On Tue, 22 Jun 2021 at 14:31, Xin Ji <xji@...logixsemi.com> wrote:
> > >
> > > Add 'bus-type' and 'data-lanes' define for port0. Define DP tx lane0,
> > > lane1 swing register array define, and audio enable flag.
> > >
> > > Signed-off-by: Xin Ji <xji@...logixsemi.com>
> > > ---
> > > .../display/bridge/analogix,anx7625.yaml | 57 ++++++++++++++++++-
> > > 1 file changed, 56 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> > > index ab48ab2f4240..9e604d19a3d5 100644
> > > --- a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> > > +++ b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> > > @@ -43,6 +43,26 @@ properties:
> > > vdd33-supply:
> > > description: Regulator that provides the supply 3.3V power.
> > >
> > > + analogix,lane0-swing:
> > > + $ref: /schemas/types.yaml#/definitions/uint32-array
> > > + minItems: 1
> > > + maxItems: 20
> > > + description:
> > > + an array of swing register setting for DP tx lane0 PHY, please don't
> > > + add this property, or contact vendor.
> > > +
> > > + analogix,lane1-swing:
> > > + $ref: /schemas/types.yaml#/definitions/uint32-array
> > > + minItems: 1
> > > + maxItems: 20
> > > + description:
> > > + an array of swing register setting for DP tx lane1 PHY, please don't
> > > + add this property, or contact vendor.
> > > +
> > > + analogix,audio-enable:
> > > + type: boolean
> > > + description: let the driver enable audio HDMI codec function or not.
> > > +
> > > ports:
> > > $ref: /schemas/graph.yaml#/properties/ports
> > >
> > > @@ -50,13 +70,43 @@ properties:
> > > port@0:
> > > $ref: /schemas/graph.yaml#/properties/port
> > > description:
> > > - Video port for MIPI DSI input.
> > > + MIPI DSI/DPI input.
> > > +
> > > + properties:
> > > + endpoint:
> > > + $ref: /schemas/media/video-interfaces.yaml#
> > > + type: object
> > > + additionalProperties: false
> > > +
> > > + properties:
> > > + remote-endpoint: true
> > > + bus-type: true
> > > + data-lanes: true
> > > +
> > > + required:
> > > + - remote-endpoint
> > > +
> > > + required:
> > > + - endpoint
> > > +
> > >
> > > port@1:
> > > $ref: /schemas/graph.yaml#/properties/port
> > > description:
> > > Video port for panel or connector.
> > >
> > > + properties:
> > > + endpoint:
> > > + $ref: /schemas/media/video-interfaces.yaml#
> > > + type: object
> > > + additionalProperties: false
> > > +
> > > + properties:
> > > + remote-endpoint: true
> > > +
> > > + required:
> > > + - remote-endpoint
> > > +
> > > required:
> > > - port@0
> > > - port@1
> > > @@ -87,6 +137,9 @@ examples:
> > > vdd10-supply = <&pp1000_mipibrdg>;
> > > vdd18-supply = <&pp1800_mipibrdg>;
> > > vdd33-supply = <&pp3300_mipibrdg>;
> > > + analogix,audio-enable;
> > > + analogix,lane0-swing = <0x14 0x54 0x64 0x74 0x29 0x7b 0x77 0x5b>;
> > > + analogix,lane1-swing = <0x14 0x54 0x64 0x74 0x29 0x7b 0x77 0x5b>;
> > >
> > > ports {
> > > #address-cells = <1>;
> > > @@ -96,6 +149,8 @@ examples:
> > > reg = <0>;
> > > anx7625_in: endpoint {
> > > remote-endpoint = <&mipi_dsi>;
> > > + bus-type = <5>;
> > > + data-lanes = <0 1 2 3>;
> > > };
> > > };
> > >
--
Regards,
Laurent Pinchart
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