linux-kernel - Re: [PATCH v3 5/5] arm64: dts: qcom: Add MST pixel streams for displayport

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Message-ID: <0261da76-a1fa-42ff-9941-4ce235a449d0@oss.qualcomm.com>
Date: Fri, 18 Jul 2025 09:37:29 -0700
From: Jessica Zhang <jessica.zhang@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <lumag@...nel.org>, Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>,
        Abel Vesa <abel.vesa@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd
 <sboyd@...nel.org>, Mahadevan <quic_mahap@...cinc.com>,
        Krishna Manikandan <quic_mkrishn@...cinc.com>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Rob Clark <robin.clark@....qualcomm.com>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Danila Tikhonov
 <danila@...xyga.com>,
        cros-qcom-dts-watchers@...omium.org
Cc: Abhinav Kumar <abhinav.kumar@....qualcomm.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, linux-clk@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Yongxing Mou <quic_yongmou@...cinc.com>
Subject: Re: [PATCH v3 5/5] arm64: dts: qcom: Add MST pixel streams for
 displayport



On 7/18/2025 2:23 AM, Konrad Dybcio wrote:
> On 7/18/25 1:28 AM, Jessica Zhang wrote:
>> The following chipsets support 2 total pixel streams:
>>    - sa8775p (on mdss_dp1)
>>    - sc8180x
>>    - sc8280xp (mdss_dp0-2 only)
>>    - sm8150
>>    - sm8350
> 
> I think 8250 can do 2 streams too, no?

Hi Konrad,

Yes, 8250 supports 2x MST. I will include it in the commit message.

Thanks,

Jessica Zhang

> 
> sdm845/sm7150 also have the clocks for it FWIW, but that doesn't
> necessarily mean they're consumed
> 
> Konrad