| 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 131=
555 [details]
/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-boa=
rd
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 c=
an
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!
Created attachment 131=
556 [details]
/proc/asound/HDMI/eld#0.0
Created attachment 131=
557 [details]
/proc/asound/HDMI/eld#0.1
Created attachment=
131558 [details]
Some interesting dmesg output
Created attachment 132140 [details] [review]
fix
Attached patch fixes multi-channel HDMI audio on my RX 460.
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.
(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 differen= ce here. :(
(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. >=20 > 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 witho= ut 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= .
(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 ;)
| What | Removed | Added |
|---|---|---|
| Summary | [amd-staging] No HDMI/DP surround sound with DC on RX 480 | [amd-staging] No DisplayPort surround sound with DC on RX 48= 0 (HDMI works) |
(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. > >=20 > > I was about to shower you with praise but sadly that patch made no > > difference here. :( >=20 > 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.
| What | Removed | Added |
|---|---|---|
| Resolution | --- | MOVED |
| Status | NEW | RESOLVED |
-- 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.