[Bug 101222] [amd-staging] No HDMI/DP surround sound with DC on RX 480

[Bug 101222] [amd-staging] No HDMI/DP surround sound with DC on RX 480

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=101222

            Bug ID: 101222
           Summary: [amd-staging] No HDMI/DP surround sound with DC on RX
                    480
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: chewi@gentoo.org

Created attachment 131555
  --> https://bugs.freedesktop.org/attachment.cgi?id=131555&action=edit
/proc/asound/HDMI/codec#0

I've been trying amd-staging on and off for a while in the hope of getting
HDMI/DP surround sound working. There seems to be very few people trying
amd-staging and even fewer trying surround sound as I haven't seen a single
mention of it anywhere. Is it even supposed to work yet?

Stereo output is working but multi-channel LPCM only appears on my receiver as
stereo and AC3 pass-through doesn't work at all. I had all this working on the
same system with my old HD 4670 and I've made do with S/PDIF from my on-board
sound in the meantime. I've tried directly with ALSA and via PulseAudio.

The latest kernel I've tried is 4.11 with
b382281b45ec359deeeeef715b182322f4fa9566. I've found alsa-lib and friends can
make a difference in the past so I just tried 1.1.4.

I'll attach some details. Note that I have a stereo monitor plugged into the
HDMI port and my receiver in the first DisplayPort. I obviously select the
right output when testing!

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[Bug 101222] [amd-staging] No HDMI/DP surround sound with DC on RX 480

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https://bugs.freedesktop.org/show_bug.cgi?id=101222

--- Comment #1 from James Le Cuirot <chewi@gentoo.org> ---
Created attachment 131556
  --> https://bugs.freedesktop.org/attachment.cgi?id=131556&action=edit
/proc/asound/HDMI/eld#0.0

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[Bug 101222] [amd-staging] No HDMI/DP surround sound with DC on RX 480

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=101222

--- Comment #2 from James Le Cuirot <chewi@gentoo.org> ---
Created attachment 131557
  --> https://bugs.freedesktop.org/attachment.cgi?id=131557&action=edit
/proc/asound/HDMI/eld#0.1

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[Bug 101222] [amd-staging] No HDMI/DP surround sound with DC on RX 480

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=101222

--- Comment #3 from James Le Cuirot <chewi@gentoo.org> ---
Created attachment 131558
  --> https://bugs.freedesktop.org/attachment.cgi?id=131558&action=edit
Some interesting dmesg output

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[Bug 101222] [amd-staging] No HDMI/DP surround sound with DC on RX 480

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https://bugs.freedesktop.org/show_bug.cgi?id=101222

--- Comment #4 from Mikko Autio <mikko.autio1@gmail.com> ---
Created attachment 132140
  --> https://bugs.freedesktop.org/attachment.cgi?id=132140&action=edit
fix

Attached patch fixes multi-channel HDMI audio on my RX 460.

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[Bug 101222] [amd-staging] No HDMI/DP surround sound with DC on RX 480

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https://bugs.freedesktop.org/show_bug.cgi?id=101222

--- Comment #5 from Harry Wentland <harry.wentland@amd.com> ---
Thanks, Mikko. Looks good. Do you want to send a patch to amd-gfx? If not I'll
create a patch with description and title for it.

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[Bug 101222] [amd-staging] No HDMI/DP surround sound with DC on RX 480

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https://bugs.freedesktop.org/show_bug.cgi?id=101222

--- Comment #6 from James Le Cuirot <chewi@gentoo.org> ---
(In reply to Mikko Autio from comment #4)
> Attached patch fixes multi-channel HDMI audio on my RX 460.

I was about to shower you with praise but sadly that patch made no difference
here. :(

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[Bug 101222] [amd-staging] No HDMI/DP surround sound with DC on RX 480

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https://bugs.freedesktop.org/show_bug.cgi?id=101222

--- Comment #7 from Mikko Autio <mikko.autio1@gmail.com> ---
(In reply to James Le Cuirot from comment #6)
> (In reply to Mikko Autio from comment #4)
> > Attached patch fixes multi-channel HDMI audio on my RX 460.
> 
> I was about to shower you with praise but sadly that patch made no
> difference here. :(

Maybe there is something else broken with DisplayPort audio?

I have my receiver plugged into HDMI port of my RX 460 and my TV is plugged
into my receiver. Multi-channel audio over HDMI was working fine even without
the patch (including AC3/DTS pass-through), but only up to 5.1 channels.
Anything over 5.1 channels appeared as stereo on my receiver.

With the patch 7.1 LPCM and DTS-HD/TrueHD pass-through are now working fine.

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[Bug 101222] [amd-staging] No HDMI/DP surround sound with DC on RX 480

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=101222

--- Comment #8 from Mikko Autio <mikko.autio1@gmail.com> ---
(In reply to Harry Wentland from comment #5)
> Thanks, Mikko. Looks good. Do you want to send a patch to amd-gfx? If not
> I'll create a patch with description and title for it.

I'll let you think of a description and title for it ;)

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[Bug 101222] [amd-staging] No DisplayPort surround sound with DC on RX 480 (HDMI works)

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https://bugs.freedesktop.org/show_bug.cgi?id=101222

James Le Cuirot <chewi@gentoo.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[amd-staging] No HDMI/DP    |[amd-staging] No
                   |surround sound with DC on   |DisplayPort surround sound
                   |RX 480                      |with DC on RX 480 (HDMI
                   |                            |works)

--- Comment #9 from James Le Cuirot <chewi@gentoo.org> ---
(In reply to Mikko Autio from comment #7)
> (In reply to James Le Cuirot from comment #6)
> > (In reply to Mikko Autio from comment #4)
> > > Attached patch fixes multi-channel HDMI audio on my RX 460.
> > 
> > I was about to shower you with praise but sadly that patch made no
> > difference here. :(
> 
> Maybe there is something else broken with DisplayPort audio?

Yes! I switched the outputs around (one was just using an adapter) and now it
works! I really should have tried that sooner. This arrangement is fine for me
as the monitor is just stereo anyway.

LPCM works and so does ALSA pass-through but PulseAudio is refusing to do
pass-through for some reason. I've had it working in the past but I can live
with that for now.

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[Bug 101222] [amd-staging] No DisplayPort surround sound with DC on RX 480 (HDMI works)

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https://bugs.freedesktop.org/show_bug.cgi?id=101222

Martin Peres <martin.peres@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |MOVED
             Status|NEW                         |RESOLVED

--- Comment #10 from Martin Peres <martin.peres@free.fr> ---
-- 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/179.

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