linux-kernel - Re: [git pull] drm for 5.17-rc1 (pre-merge window pull)

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Message-ID: <6490ec74-7de2-c3a3-d852-31b8594110d8@amd.com>
Date:   Tue, 11 Jan 2022 10:38:48 -0500
From:   Harry Wentland <harry.wentland@....com>
To:     Alex Deucher <alexdeucher@...il.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Jun Lei <Jun.Lei@....com>,
        Mustapha Ghaddar <mustapha.ghaddar@....com>,
        Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>,
        meenakshikumar somasundaram <meenakshikumar.somasundaram@....com>,
        Daniel Wheeler <daniel.wheeler@....com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Dave Airlie <airlied@...il.com>,
        "Koenig, Christian" <christian.koenig@....com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>
Subject: Re: [git pull] drm for 5.17-rc1 (pre-merge window pull)



On 2022-01-11 10:08, Alex Deucher wrote:
> On Mon, Jan 10, 2022 at 9:53 PM Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
>>
>> On Mon, Jan 10, 2022 at 6:44 PM Linus Torvalds
>> <torvalds@...ux-foundation.org> wrote:
>>>
>>> I'll double-check to see if a revert fixes it at the top of my tree.
>>
>> Yup. It reverts cleanly, and the end result builds and works fine, and
>> doesn't show the horrendous flickering.
>>
>> I have done that revert, and will continue the merge window work.
>> Somebody else gets to figure out what the actual bug is, but that
>> commit was horribly broken on my machine (Sapphire Pulse RX 580 8GB,
>> fwiw).
> 
> Thanks for tracking this down.  We are investigating the issue.
> 

Thanks for tracking this down. It was the result of a bad merge
from an internal branch.

Attached is a v2 of the buggy patch that should get this right.
If you have a chance to try it out let us know, if not we'll get
someone to repro and test the fix.

Harry

> Alex

View attachment "0001-drm-amd-display-Fix-for-otg-synchronization-logic.patch" of type "text/x-patch" (9451 bytes)