linux-kernel - Re: [PATCH v4 1/4] drm/msm/dp: Fix support of LTTPR initialization

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Message-ID: <bax6ropbymr2jqwlqvvmetgvsh35s7veevtj4sdwoh5jqghdwb@yrikyb5z3dkn>
Date: Sat, 3 May 2025 00:54:30 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Jessica Zhang <quic_jesszhan@...cinc.com>
Cc: Aleksandrs Vinarskis <alex.vinarskis@...il.com>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        laurentiu.tudor1@...l.com, abel.vesa@...aro.org, johan@...nel.org,
        Johan Hovold <johan+linaro@...nel.org>
Subject: Re: [PATCH v4 1/4] drm/msm/dp: Fix support of LTTPR initialization

On Fri, May 02, 2025 at 10:41:41AM -0700, Jessica Zhang wrote:
> 
> 
> On 4/29/2025 5:09 PM, Aleksandrs Vinarskis wrote:
> > Initialize LTTPR before msm_dp_panel_read_sink_caps, as DPTX shall
> > (re)read DPRX caps after LTTPR detection, as required by DP 2.1,
> > Section 3.6.7.6.1.
> > 
> > Fixes: 72d0af4accd9 ("drm/msm/dp: Add support for LTTPR handling")
> > 
> > Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> > Signed-off-by: Aleksandrs Vinarskis <alex.vinarskis@...il.com>
> > Tested-by: Johan Hovold <johan+linaro@...nel.org>
> > Tested-by: Rob Clark <robdclark@...il.com>
> 
> Hi Aleksandrs,
> 
> For this patch and the rest of the series:
> 
> Tested-by: Jessica Zhang <quic_jesszhan@...cinc.com> # SA8775P

Were you testing in a setup with LTTPRs?

-- 
With best wishes
Dmitry