linux-kernel - Re: [PATCH v4 13/13] arm64: dts: qcom: sa8295-adp: Enable DP instances

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Message-ID: <9aaabc1f-6d7f-2e75-8831-30e88180f3bf@linaro.org>
Date:   Mon, 5 Dec 2022 21:09:51 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Bjorn Andersson <andersson@...nel.org>
Cc:     Bjorn Andersson <quic_bjorande@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Kalyan Thota <quic_kalyant@...cinc.com>,
        Jessica Zhang <quic_jesszhan@...cinc.com>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>,
        Johan Hovold <johan+linaro@...nel.org>,
        Sankeerth Billakanti <quic_sbillaka@...cinc.com>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 13/13] arm64: dts: qcom: sa8295-adp: Enable DP
 instances



On 05/12/2022 21:02, Bjorn Andersson wrote:
> On Mon, Dec 05, 2022 at 07:09:45PM +0100, Konrad Dybcio wrote:
>> On 05/12/2022 18:44, Bjorn Andersson wrote:
>>> diff --git a/arch/arm64/boot/dts/qcom/sa8295p-adp.dts b/arch/arm64/boot/dts/qcom/sa8295p-adp.dts
> [..]
>>> +&mdss0_dp2 {
>>> +	status = "okay";
>> status should go last.
>>
> 
> Thanks for pointing that out. Would be nice if the computer told me
> that...somehow...
> 
>>> +
>>> +	data-lanes = <0 1 2 3>;
>>> +
>>> +	ports {
>>> +		port@1 {
>>> +			reg = <1>;
>>> +			mdss0_dp2_phy_out: endpoint {
>> That's quite a lot of indentation.. couldn't these endpoints be defined in
>> the SoC DT?
>>
> 
> The alternative would be to have the description of each DP controller
> split over multiple nodes and rely on the reader to stitch together the
> view of the node based on the label.
> Based on the naming of these labels they would at least be adjacent, so
> it wouldn't be that bad.
> 
> But I feel that there is enough DP-controller nodes in this board
> already; I've yet to describe the two USB Type-C controllers or the two
> DSI-DP bridges.
> So I don't know if it's worth optimizing indentation-level within each
> node like this.
> 
> 
> And we will end up mixing this optimization between DP controllers, USB
> Type-C nodes, QMP nodes, DSI-DP bridges.
Oh okay, I see, let's keep it as-is then.

Konrad
> 
> Regards,
> Bjorn