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!
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
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
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
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.
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.
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. :(
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.
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 ;)
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.
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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