linux-kernel - Re: [PATCH 2/4] arm64: dts: qcom: add sdm845-google-blueline (Pixel 3)

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Message-ID: <af496488-6761-d1a3-18c4-85bc63e37b9e@linaro.org>
Date:   Tue, 19 Jul 2022 02:15:00 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Caleb Connolly <caleb@...nolly.tech>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht,
        Kalle Valo <kvalo@...nel.org>
Cc:     Amit Pundir <amit.pundir@...aro.org>, Vinod Koul <vkoul@...nel.org>
Subject: Re: [PATCH 2/4] arm64: dts: qcom: add sdm845-google-blueline (Pixel
 3)

On 19/07/2022 01:54, Caleb Connolly wrote:
> 
> 
> On 18/07/2022 23:13, Dmitry Baryshkov wrote:
>> Any idea, what is the issue here? Do you have the datasheet for the panel?
> As Marijn just mentioned on IRC, the driver right now only calls
> drm_dsc_pps_payload_pack() but doesn't actually send it. I haven't
> investigated this myself but I'll look into it.
> 
> Unfortunately no datasheet afaik, they tend to be pretty elusive. The
> things I would do for a phone panel datasheet...

as a side note: I checked the dtbo.img. There are three different 
versions of the panel programming sequences in the included dtb files. 
So you might want to check for the difference with 
linux-mdss-dsi-panel-driver-generator.

-- 
With best wishes
Dmitry