linux-kernel - Re: [PATCH v7 0/7] incorporate pm runtime framework and eDP clean up

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Message-ID: <55a4f98e-2772-e4fd-ae8a-132f92582c78@quicinc.com>
Date:   Tue, 7 Nov 2023 13:00:24 -0800
From:   Kuogee Hsieh <quic_khsieh@...cinc.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
CC:     <dri-devel@...ts.freedesktop.org>, <robdclark@...il.com>,
        <sean@...rly.run>, <swboyd@...omium.org>, <dianders@...omium.org>,
        <vkoul@...nel.org>, <daniel@...ll.ch>, <airlied@...il.com>,
        <agross@...nel.org>, <andersson@...nel.org>,
        <quic_abhinavk@...cinc.com>, <quic_jesszhan@...cinc.com>,
        <quic_sbillaka@...cinc.com>, <marijn.suijten@...ainline.org>,
        <freedreno@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v7 0/7] incorporate pm runtime framework and eDP clean up


On 11/6/2023 5:55 PM, Dmitry Baryshkov wrote:
> On Sat, 7 Oct 2023 at 01:55, Kuogee Hsieh <quic_khsieh@...cinc.com> wrote:
>> The purpose of this patch series is to incorporate pm runtime framework
>> into MSM eDP/DP driver so that eDP panel can be detected by DRM eDP panel
>> driver during system probe time. During incorporating procedure, original
>> customized pm realted fucntions, such as dp_pm_prepare(), dp_pm_suspend(),
>> dp_pm_resume() and dp_pm_prepare(), are removed and replaced with functions
>> provided by pm runtiem framework such as pm_runtime_force_suspend() and
>> pm_runtime_force_resume(). In addition, both eDP aux-bus and irq handler
>> are bound at system probe time too.
>
> With this patchset in place I can crash the board using the following
> sequence (SM8350-HDK):
>
> - plug the USBC DP dongle
> - run modetest at any mode, don't press Enter yet
> - unplug the dongle
> - press Enter to stop modetest
>
> => the board resets to Sahara.
>
> Please ping me if you need any additional information from my side.

questiosn,

1) which dongle are you used?

2) what code branch shoud I used to duplicate this problem.

I can not duplicate  system crash problem at my setup kodiak (SM7325) 
chrome book with my PM runtime patch series.

my code base is Linux 6.6-rc2 + pm runtime patch series (7 patches)

I did:

1) plugin either apple dongle (DP-to-HDMI) + 1080p display or DP typeC 
cable directly to 1080p display

2)  stop ui

3) /usr/bin/modetest -M msm -s 34:1920x1080 (see test pattern show at 
display)

4) unplug apple dongle or DP typeC cable

5) hit enter key

6) start ui

7) display back to login page of chrome book