[Bug 107835] DisplayPort audio stopped working in a kernel upgrade

2019-11-19 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=107835

Martin Peres  changed:

   What|Removed |Added

 Resolution|--- |MOVED
 Status|NEW |RESOLVED

--- Comment #4 from Martin Peres  ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/515.

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[Bug 107835] DisplayPort audio stopped working in a kernel upgrade

2019-08-26 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=107835

--- Comment #3 from Marti Raudsepp  ---
Thanks Alex, reported new bug 111492.

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[Bug 107835] DisplayPort audio stopped working in a kernel upgrade

2019-08-26 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=107835

--- Comment #2 from Alex Deucher  ---
Southern Islands is not supported by the DC modesetting code, so this is not
the same issue as the OP's.

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[Bug 107835] DisplayPort audio stopped working in a kernel upgrade

2019-08-26 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=107835

--- Comment #1 from Marti Raudsepp  ---
Graphics card: ASUS Radeon R9 270
Kernel: 5.2.9-arch1-1-ARCH

I recently had some issues with the "radeon" driver and discovered that the
"amdgpu" driver now has support for Southern Islands (SI) GPUs using the
amdgpu.si_support=1 boot flag.

Graphics stuff works great with "amdgpu" so far, however, all HDMI audio
outputs are marked as "(unplugged) (unavailable)". This seems to be a similar
problem, based on IRC logs by BCMM at
https://dri.freedesktop.org/~cbrill/dri-log/?channel=radeon&highlight_names=&date=2018-09-05
which lead me to this bug report.
His screenshot from pavuctl: https://i.imgur.com/67HYPG3.png

Ben, are you still having this issue too?

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[Bug 107835] DisplayPort audio stopped working in a kernel upgrade

2018-09-05 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=107835

Bug ID: 107835
   Summary: DisplayPort audio stopped working in a kernel upgrade
   Product: DRI
   Version: unspecified
  Hardware: Other
OS: All
Status: NEW
  Severity: normal
  Priority: medium
 Component: DRM/AMDgpu
  Assignee: dri-devel@lists.freedesktop.org
  Reporter: b...@benmorris.org.uk

In a recent kernel upgrade, my DisplayPort audio output stopped working.
PulseAudio showed no available profiles for the device, while aplay appeared to
work normally but produced no sound. I'm running Debian Unstable, and I have a
Radeon RX 470.

I have bisected (in linux-stable), and narrowed down the start of the problem
to this commit:

commit 9168c089a2122606e2c01f6fbeda85ff950ac189 (HEAD, refs/bisect/bad)
Author: Alex Deucher 
Date:   Tue Jul 10 12:56:45 2018 -0500

Revert "drm/amd/display: Don't return ddc result and read_bytes in same
return value"

commit 5292221d6ddfed75e5b46cd42237a677094b99f3 upstream.

This reverts commit 018d82e5f02ef3583411bcaa4e00c69786f46f19.

This breaks DDC in certain cases.  Revert for 4.18 and previous kernels.
For 4.19, this is fixed with the following more extensive patches:
drm/amd/display: Serialize is_dp_sink_present
drm/amd/display: Break out function to simply read aux reply
drm/amd/display: Return aux replies directly to DRM
drm/amd/display: Right shift AUX reply value sooner than later
drm/amd/display: Read AUX channel even if only status byte is returned

Link: https://lists.freedesktop.org/archives/amd-gfx/2018-July/023788.html
Acked-by: Harry Wentland 
Signed-off-by: Alex Deucher 
Cc: sta...@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman 


I have tried kernel 4.19-rc2, and, as suggested in the commit message, the
audio problem does indeed seem to be resolved in 4.19.

I have never seen the stacktrace associated with the same commit at
https://bugzilla.kernel.org/show_bug.cgi?id=200667

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