On 05/02/2021 09:45, Nicolin Chen wrote:

Hi Guillaume,

On Thu, Feb 04, 2021 at 09:24:23PM -0800, Nicolin Chen wrote:

quoted

quoted

Please let us know if you need any help debugging this issue or
to try a fix on this platform.

Yes, I don't have any Tegra124 platform to run. It'd be very nice
if you can run some debugging patch (I can provide you) and a fix
after I root cause the issue.

Would it be possible for you to run with the given debugging patch?

It'd be nicer if I can get both logs of the vanilla kernel (failing)
and the commit-reverted version (passing), each applying this patch.

Sure, I've run 3 jobs:

* v5.11-rc6 as a reference, to see the original issue:
  https://lava.collabora.co.uk/scheduler/job/3187848

* + your debug patch:
  https://lava.collabora.co.uk/scheduler/job/3187849

* + the "breaking" commit reverted, passing the tests:
  https://lava.collabora.co.uk/scheduler/job/3187851


You can see the history of the test branch I'm using here, with
the 3 revisions mentioned above:

  https://gitlab.collabora.com/gtucker/linux/-/commits/linux-5.11-rc6-nyan-big-drm-read/


Hope that helps,
Guillaume