[Bug 101900] No HDMI HBR audio on Polaris (no TrueHD, no Atmos, no Neo:X, no HD Master audio) and static noise in sound when LPCM on amdgpu Xorg driver

[bugzilla-daemon at freedesktop.org]

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

--- Comment #35 from Direx <direx at betriebsdirektor.de> ---
(In reply to Harry Wentland from comment #34)
> DC seems to take channel_count/audio_count to refer to the actual number of
> channels whereas the CEA EDID extension and our HW represent it as the
> number of channels-1. So as not to break other uses of this count (such as
> check_audio_bandwidth_hdmi()) this patch adds 1 when we get the count from
> the EDID.
> 
> Can someone give it a spin? It's based on the latest amd-staging-drm-next
> branch but should apply on other branches as well.

Just tested it on a fresh amd-staging-drm-next and it is also working. All
audio formats are working correctly. *thumbs up*

Could this be backported to 4.15 / 4.16 as it actually is a simple bug fix?


@lethalwp:

I think your issue is unrelated to this one. I get that too occasionally, but
it has nothing to do with the wrong channel count in this bug.

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