AMD DC test results

[Carlo Caione]

On Thu, Dec 21, 2017 at 1:45 PM, Daniel Drake <drake at endlessm.com> wrote:
> Hi,

Hi again,
in Endless we are still actively working with DC on several laptops,
so I just wanted to give you a quick update regarding the regressions
indicated in Daniel's email.

> 1. System hangs on S3 resume.
> Bug can't be reproduced when booting with amdgpu.dc=0
> Also reproduced with DC on Linus master (4.15-rc), but appears fixed
> on agd5f/amd-staging-drm-next
> https://bugs.freedesktop.org/show_bug.cgi?id=104281

This keeps being an issue. Unfortunately (as stated in the bug report)
this problem is still reproducible on the agd5f/amd-staging-drm-next
branch (tested it today with HEAD at 95b5f44) even though the
frequency is not high (maybe 1/10 suspends or less). In the bug report
you can find the dmesg log if interested.

> 2. Display corruption when using multiple displays
> Bug can't be reproduced when booting with amdgpu.dc=0
> Also reproduced with DC on Linus master (4.15-rc), but appears fixed
> on agd5f/amd-staging-drm-next
> https://bugs.freedesktop.org/show_bug.cgi?id=104319

I was able to bisect this problem down to 1 specific commit (see [0]).

> 3. HDMI audio device still shown as present and active even after
> disconnecting HDMI cable
> Bug can't be reproduced when booting with amdgpu.dc=0
> Appears fixed with DC on Linus master (4.15-rc).

This was indeed fixed in on Linus master.

Thank you very much for the DC work!

Cheers,

[0] https://www.spinics.net/lists/dri-devel/msg161258.html

-- 
Carlo Caione  |  +44.7384.69.16.04  |  Endless