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!