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

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Message-ID: <b708df07-6812-df43-1313-cf6f1289fd47@quicinc.com>
Date:   Wed, 8 Nov 2023 10:10:32 -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 11/7/2023 1:23 PM, Dmitry Baryshkov wrote:
> On Tue, 7 Nov 2023 at 23:01, Kuogee Hsieh <quic_khsieh@...cinc.com> wrote:
>>
>> 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?
> I have used several Dell and Hama USB-C dongles.
>
>> 2) what code branch shoud I used to duplicate this problem.
> I have pushed my kernel tree to
> git.codelinaro.org/dmitry.baryshkov/linux.git, branch test-dp-rpm
> I had several UCSI patches on top, but they should not be relevant.
git.codelinaro.org/dmitry.baryshkov/linux.git, branch test-dp-rpm <== I 
synced out his branch and it is still work at my chromebook Kodiak DUT.
>
>> 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
>>
>>
>