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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Mon, 14 Dec 2020 14:21:20 -0800
Message-ID: <CAHk-=wjue4aOyQQq+C6SEurwe6XABhMyNtsfn1goU==Hf_QUqA@mail.gmail.com>
Subject: Re: [git pull] drm for 5.11-rc1
To:     Dave Airlie <airlied@gmail.com>
Cc:     Daniel Vetter <daniel.vetter@ffwll.ch>,
        dri-devel <dri-devel@lists.freedesktop.org>,
        LKML <linux-kernel@vger.kernel.org>
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On Thu, Dec 10, 2020 at 7:52 PM Dave Airlie <airlied@gmail.com> wrote:
>
> This is an early pull request for drm for 5.11 merge window. I'm going
> to be out for most of the first week of the merge window so thought
> I'd just preempt things and send this early.

Ok, I've merged this, and Dave is likely gone already, but it _looks_
like there's a problem with the drm tree on my Radeon workstation.

It works fine on my i915 laptop.

The symptoms are that the boot just hangs after

   fb0: switching to amdgpudrmfb from EFI VGA

when on a working kernel the next lines are

  amdgpu 0000:49:00.0: vgaarb: deactivate vga console
  [drm] initializing kernel modesetting (POLARIS10 0x1002:0x67DF
0x1DA2:0xE353 0xE7).
  amdgpu 0000:49:00.0: amdgpu: Trusted Memory Zone (TMZ) feature not supported
  [drm] register mmio base: 0xE1C00000
  [drm] register mmio size: 262144

I'm bisecting for more details, but it might take a while, and I
thought I'd start the ball rolling with this initial report in case
somebody goes "Aahh.., we know about that case already, the fix is
XYZ"...

              Linus