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: <b7f0f3e1-522b-4763-be31-dcee1948f7b3@heusel.eu>
Date: Mon, 29 Jul 2024 10:47:58 +0200
From: Christian Heusel <christian@...sel.eu>
To: 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 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.

Cheers,
Chris

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