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From: Mark Boddington <lkml@badpenguin.co.uk>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: stable@vger.kernel.org, regressions@lists.linux.dev
Subject: Re: kernel 5.15.1: AMD RX 6700 XT - Fails to resume after screen blank
Date: Wed, 10 Nov 2021 23:11:12 +0000	[thread overview]
Message-ID: <797107e1-6595-f3ef-e7b2-5784667f73e7@badpenguin.co.uk> (raw)
In-Reply-To: <b266047e-5674-d1e6-de4b-59a90299f022@badpenguin.co.uk>

And also 
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c?h=linux-5.15.y&id=f02abeb0779700c308e661a412451b38962b8a0b

Maybe if the function is called during resume() without being called 
during init(), bad things happen???

Cheers

On 10/11/2021 23:02, Mark Boddington wrote:
> I think I've found the problem.
>
> The amdgpu_amdkfd_resume_iommu(adev) call has been moved around a few 
> times recently, but in 5.15.1 it's been removed completely.
>
> I think reverting this patch fixes the issue: 
> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c?h=linux-5.15.y&id=f17dca0ab3f38b19c0f1b935f417f62d4a528723
>
> See also: 
> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c?h=linux-5.15.y&id=714d9e4574d54596973ee3b0624ee4a16264d700
>
> Cheers,
>
> Mark
>
> On 10/11/2021 17:38, Greg KH wrote:
>> On Wed, Nov 10, 2021 at 04:27:39PM +0000, Mark Boddington wrote:
>>> Hi all,
>>>
>>> I run the mainline Linux kernel on Ubuntu 20.04, built from
>>> https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.15.1/
>>>
>>> There appears to be a regression in 5.15.1 which causes the GPU to 
>>> fail to
>>> resume after power saving.
>>>
>>> Could it be this change??:
>>>
>>> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c?h=v5.15.1&id=8af3a335b5531ca3df0920b1cca43e456cd110ad 
>>>
>> If you revert it, does it solve the problem for you?
>>
>> If not, what kernel version did work for you with this hardware?
>>
>> thanks,
>>
>> greg k-h

  reply	other threads:[~2021-11-10 23:11 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-10 16:27 Mark Boddington
2021-11-10 17:38 ` Greg KH
2021-11-10 18:53   ` Mark Boddington
2021-11-10 23:02   ` Mark Boddington
2021-11-10 23:11     ` Mark Boddington [this message]
2021-11-12 16:04       ` Thorsten Leemhuis
2021-11-12 17:24         ` Mark Boddington
2021-11-13  8:15           ` Thorsten Leemhuis

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