[PATCH v5] drm/amd/display: Revert W/A for hard hangs on DCN20/DCN21

Limonciello, Mario mario.limonciello at amd.com
Thu Jan 13 14:55:05 UTC 2022

On 1/13/2022 03:16, Bert Karwatzki wrote:
> Am Mittwoch, dem 12.01.2022 um 02:08 +0000 schrieb Limonciello, Mario:
>> [AMD Official Use Only]
>>> -----Original Message-----
>>> From: Bert Karwatzki <spasswolf at web.de>
>>> Sent: Tuesday, January 11, 2022 19:12
>>> To: amd-gfx at lists.freedesktop.org
>>> Cc: Limonciello, Mario <Mario.Limonciello at amd.com>; Kazlauskas,
>>> Nicholas
>>> <Nicholas.Kazlauskas at amd.com>; Zhuo, Qingqing (Lillian)
>>> <Qingqing.Zhuo at amd.com>; Scott Bruce <smbruce at gmail.com>; Chris
>>> Hixon
>>> <linux-kernel-bugs at hixontech.com>
>>> Subject: [PATCH v5] drm/amd/display: Revert W/A for hard hangs on
>>> DCN20/DCN21
>>> I just tested patch v5 applied to amd-staging-drm-next (with HEAD
>>> 26c981e27e698c251ef3241f73ac846e66ad7fc3) and suspend and resume
>>> work
>>> fine. But as amd-staging-drm-next is still based on linux-5.13 I
>>> had to
>>> replace the mediatek wlan driver by the version from linux-5.16.
>> FYI it should likely cherry pick to 5.16 too if it's easier to test
>> there.
>> I was able to cherry-pick to rc8 no problem.
>> If you can please try any display hotplugging to make sure hotplugs
>> don’t
>> cause problems for you as well feel comfortable to add a Tested-by
>> tag.
>> Thanks,
> Unfortunately the external HDMI port on my Notebook (Alpha 15 B5EEK/MS-
> 158L) does not seem to work out-of-the-box. This is a two GPU machine
> 03:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Navi
> 23 [Radeon RX 6600/6600 XT/6600M] (rev c3)
> 08:00.0 VGA compatible controller: Advanced Micro Devices, Inc.
> [AMD/ATI] Cezanne (rev c5)
>   The Desktop Environment (gnome with Xorg) is running on the integrated
> Cezanne, but when I connect the external HDMI cable I get a dmesg
> resume message from the Navi GPU. So this either requires some
> additional configuration effort on my part or this is a story for
> another bug report.

Unless this changes without this revert patch in place then I would say 
a story for another bug report.

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