hi -----Original Message----- From: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> Sent: Thursday, October 6, 2022 4:17 PM To: Allen Chen (陳柏宇) <allen.chen@xxxxxxxxxx> Cc: Jau-Chih Tseng (曾昭智) <Jau-Chih.Tseng@xxxxxxxxxx>; Kenneth Hung (洪家倫) <Kenneth.Hung@xxxxxxxxxx>; Hermes Wu (吳佳宏) <Hermes.Wu@xxxxxxxxxx>; Pin-yen Lin <treapking@xxxxxxxxxxxx>; Andrzej Hajda <andrzej.hajda@xxxxxxxxx>; Neil Armstrong <narmstrong@xxxxxxxxxxxx>; Robert Foss <robert.foss@xxxxxxxxxx>; Laurent Pinchart <Laurent.pinchart@xxxxxxxxxxxxxxxx>; Jonas Karlman <jonas@xxxxxxxxx>; Jernej Skrabec <jernej.skrabec@xxxxxxxxx>; David Airlie <airlied@xxxxxxxx>; Daniel Vetter <daniel@xxxxxxxx>; Rob Herring <robh+dt@xxxxxxxxxx>; Krzysztof Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx>; open list:DRM DRIVERS <dri-devel@xxxxxxxxxxxxxxxxxxxxx>; open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS <devicetree@xxxxxxxxxxxxxxx>; open list <linux-kernel@xxxxxxxxxxxxxxx> Subject: Re: [PATCH v3 1/2] dt-bindings: it6505: add properties to restrict output bandwidth On 06/10/2022 04:04, allen wrote: > From: allen chen <allen.chen@xxxxxxxxxx> > > Add properties to restrict dp output data-lanes and clock. > > Signed-off-by: Pin-Yen Lin <treapking@xxxxxxxxxxxx> > Signed-off-by: Allen Chen <allen.chen@xxxxxxxxxx> > --- > .../bindings/display/bridge/ite,it6505.yaml | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > > diff --git > a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml > b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml > index 833d11b2303a..f5482a614d05 100644 > --- a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml > +++ b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml > @@ -52,6 +52,16 @@ properties: > maxItems: 1 > description: extcon specifier for the Power Delivery > > + ite,dp-output-data-lane-count: > + description: restrict the dp output data-lanes with value of 1-4 Drop "with value of 1-4" because it is redundant, but instead explain what this property is about. "Restrict output" is not yet enough. Restrict the number? Or choose specific lanes? Why it cannot be data-lanes from video-interfaces? ==> DP output bandwidth depends on data-lane-count, so the number of output data-lane-count will restrict output bandwidth. In this dt-binding we don't have output endpoint, so use another property name to configure. If need to use data-lanes, where can we put in this dt-binding? > + $ref: /schemas/types.yaml#/definitions/uint32 > + enum: [ 1, 2, 4 ] > + > + ite,dp-output-max-pixel-clock-mhz: Test your patches before sending. Best regards, Krzysztof
