[Bug 101900] No HDMI audio on Polaris

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101900

            Bug ID: 101900
           Summary: No HDMI audio on Polaris
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: direx at betriebsdirektor.de

Created attachment 132868
  --> https://bugs.freedesktop.org/attachment.cgi?id=132868&action=edit
dmesg

I am using the current amd-staging-4.11 tree with DC/DAL and HDMI audio is
still not working on my RX480. I have already experimented with the
amdgpu.audio parameter, but it does not change anything.

alsamixer shows 6 different SPDIF devices for "HDA ATI HDMI" and they are all
unmuted. Still HDMI audio is not working at all.

The dmesg actually looks promising, as dc_link_detect detects my AVR and quite
a few sound modes with different channel numbers.

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