From: Johan Hovold <johan@kernel.org>
To: Rob Clark <robdclark@gmail.com>,
Abhinav Kumar <quic_abhinavk@quicinc.com>,
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
Kuogee Hsieh <quic_khsieh@quicinc.com>
Cc: Sean Paul <sean@poorly.run>,
Marijn Suijten <marijn.suijten@somainline.org>,
David Airlie <airlied@gmail.com>, Daniel Vetter <daniel@ffwll.ch>,
Bjorn Andersson <quic_bjorande@quicinc.com>,
quic_jesszhan@quicinc.com, quic_sbillaka@quicinc.com,
dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org,
linux-arm-msm@vger.kernel.org, regressions@lists.linux.dev,
linux-kernel@vger.kernel.org
Subject: Re: drm/msm: DisplayPort regressions in 6.8-rc1
Date: Sat, 17 Feb 2024 16:22:09 +0100 [thread overview]
Message-ID: <ZdDPISS5ntrWSPf_@hovoldconsulting.com> (raw)
In-Reply-To: <ZctVmLK4zTwcpW3A@hovoldconsulting.com>
On Tue, Feb 13, 2024 at 12:42:17PM +0100, Johan Hovold wrote:
> Since 6.8-rc1 the internal eDP display on the Lenovo ThinkPad X13s does
> not always show up on boot.
>
> The logs indicate problems with the runtime PM and eDP rework that went
> into 6.8-rc1:
>
> [ 6.007872] [drm:drm_bridge_attach [drm]] *ERROR* failed to attach bridge /soc@0/phy@88eb000 to encoder TMDS-31: -16
> and this can also manifest itself as a NULL-pointer dereference:
>
> [ 7.339447] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
>
> [ 7.643705] pc : drm_bridge_attach+0x70/0x1a8 [drm]
#regzbot ^introduced: 2bcca96abfbf
It looks like it may have been possible to hit this also before commit
2bcca96abfbf ("soc: qcom: pmic-glink: switch to DRM_AUX_HPD_BRIDGE") and
the transparent bridge rework in 6.8-rc1 even if that has not yet been
confirmed.
The above is what made this trigger since 6.8-rc1 however.
Johan
next prev parent reply other threads:[~2024-02-17 15:22 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-13 11:42 drm/msm: DisplayPort regressions in 6.8-rc1 Johan Hovold
2024-02-13 18:00 ` Abhinav Kumar
2024-02-14 13:18 ` Linux regression tracking (Thorsten Leemhuis)
2024-02-14 13:52 ` Johan Hovold
2024-02-17 15:14 ` Johan Hovold
2024-02-19 10:41 ` drm/msm: Second DisplayPort regression " Johan Hovold
2024-02-19 13:38 ` Johan Hovold
2024-02-20 21:19 ` Abhinav Kumar
2024-02-21 8:05 ` Johan Hovold
2024-02-17 15:22 ` Johan Hovold [this message]
2024-02-23 7:49 ` drm/msm: DisplayPort regressions " Linux regression tracking #update (Thorsten Leemhuis)
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=ZdDPISS5ntrWSPf_@hovoldconsulting.com \
--to=johan@kernel.org \
--cc=airlied@gmail.com \
--cc=daniel@ffwll.ch \
--cc=dmitry.baryshkov@linaro.org \
--cc=dri-devel@lists.freedesktop.org \
--cc=freedreno@lists.freedesktop.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=marijn.suijten@somainline.org \
--cc=quic_abhinavk@quicinc.com \
--cc=quic_bjorande@quicinc.com \
--cc=quic_jesszhan@quicinc.com \
--cc=quic_khsieh@quicinc.com \
--cc=quic_sbillaka@quicinc.com \
--cc=regressions@lists.linux.dev \
--cc=robdclark@gmail.com \
--cc=sean@poorly.run \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.