linux-kernel - Re: [REGRESSION] No image on 4k display port displays connected through usb-c dock in kernel 6.10

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Message-ID: <ca007d54-c204-4f7f-9eca-5a282324b941@leemhuis.info>
Date: Mon, 29 Jul 2024 11:15:44 +0200
From: "Linux regression tracking (Thorsten Leemhuis)"
 <regressions@...mhuis.info>
To: Christian Heusel <christian@...sel.eu>,
 Linux regressions mailing list <regressions@...ts.linux.dev>
Cc: Greg KH <gregkh@...uxfoundation.org>, "Lin, Wayne" <Wayne.Lin@....com>,
 "stable@...r.kernel.org" <stable@...r.kernel.org>,
 LKML <linux-kernel@...r.kernel.org>,
 ML dri-devel <dri-devel@...ts.freedesktop.org>,
 "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
 "Wu, Hersen" <hersenxs.wu@....com>,
 "Deucher, Alexander" <Alexander.Deucher@....com>,
 "kevin@...m.dev" <kevin@...m.dev>
Subject: Re: [REGRESSION] No image on 4k display port displays connected
 through usb-c dock in kernel 6.10

On 29.07.24 10:47, Christian Heusel wrote:
> On 24/07/29 10:35AM, Linux regression tracking (Thorsten Leemhuis) wrote:
>> [+Greg +stable]
>>
>> On 29.07.24 10:16, Lin, Wayne wrote:
>>>
>>> Thanks for the report.
>>>
>>> Patch fa57924c76d995 ("drm/amd/display: Refactor function dm_dp_mst_is_port_support_mode()")
>>> is kind of correcting problems causing by commit:
>>> 4df96ba6676034 ("drm/amd/display: Add timing pixel encoding for mst mode validation")
>>>
>>> Sorry if it misses fixes tag and would suggest to backport to fix it. Thanks!
>>
>> Greg, seem it would be wise to pick up fa57924c76d995 for 6.10.y as
>> well, despite a lack of Fixes or stable tags.
>>
>> Ciao, Thorsten
> 
> The issue is that the fixing commit does not apply to the 6.10 series
> without conflict and the offending commit does not revert cleanly
> aswell.

Hah, many thx, I should have checked that.

Lin, Wayne: could you maybe help out here and provide something for 6.10.y?

Ciao, Thorsten