[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 #34 from Harry Wentland <harry.wentland at amd.com> ---
Created attachment 137870
  --> https://bugs.freedesktop.org/attachment.cgi?id=137870&action=edit
[PATCH] Add one to EDID's audio channel count when passing to DC

Thanks everyone for the debug on this one and especially Andrew for the patch.

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.

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