Messages in this thread Patch in this message | | | From | <> | Subject | RE: [PATCH v3 1/2] dt-bindings: it6505: add properties to restrict output bandwidth | Date | Fri, 7 Oct 2022 03:18:23 +0000 |
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hi
-----Original Message----- From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Sent: Thursday, October 6, 2022 4:17 PM To: Allen Chen (陳柏宇) <allen.chen@ite.com.tw> Cc: Jau-Chih Tseng (曾昭智) <Jau-Chih.Tseng@ite.com.tw>; Kenneth Hung (洪家倫) <Kenneth.Hung@ite.com.tw>; Hermes Wu (吳佳宏) <Hermes.Wu@ite.com.tw>; Pin-yen Lin <treapking@chromium.org>; Andrzej Hajda <andrzej.hajda@intel.com>; Neil Armstrong <narmstrong@baylibre.com>; Robert Foss <robert.foss@linaro.org>; Laurent Pinchart <Laurent.pinchart@ideasonboard.com>; Jonas Karlman <jonas@kwiboo.se>; Jernej Skrabec <jernej.skrabec@gmail.com>; David Airlie <airlied@linux.ie>; Daniel Vetter <daniel@ffwll.ch>; Rob Herring <robh+dt@kernel.org>; Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>; open list:DRM DRIVERS <dri-devel@lists.freedesktop.org>; open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS <devicetree@vger.kernel.org>; open list <linux-kernel@vger.kernel.org> 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@ite.com.tw> > > Add properties to restrict dp output data-lanes and clock. > > Signed-off-by: Pin-Yen Lin <treapking@chromium.org> > Signed-off-by: Allen Chen <allen.chen@ite.com.tw> > --- > .../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
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