linux-kernel - Re: [PATCH] dt-bindings: display: msm: dsi: remove address/size cells

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Message-ID: <41fe6179-5628-6393-01c1-918baccec176@linaro.org>
Date:   Mon, 28 Mar 2022 19:04:26 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Krishna Manikandan <mkrishn@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Vinod Koul <vkoul@...nel.org>
Subject: Re: [PATCH] dt-bindings: display: msm: dsi: remove address/size cells

On 28/03/2022 18:43, Dmitry Baryshkov wrote:
> On Mon, 28 Mar 2022 at 18:30, Krzysztof Kozlowski
> <krzysztof.kozlowski@...aro.org> wrote:
>>
>> The DSI node is not a bus and the children do not have unit addresses.
>>
>> Reported-by: Vinod Koul <vkoul@...nel.org>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> 
> NAK.
> DSI panels are children of the DSI device tree node with the reg = <0>; address.
> This is the convention used by other platforms too (see e.g.
> arch/arm64/boot/dts/freescale/imx8mq-evk.dts).
> 
> With the DSI split link it is possible to attach two panels to a
> single DSI host, so addresses are necessary.

Yes, I noticed it slightly after I sent the patch. :(


Best regards,
Krzysztof