[Bug 91371] Tonga HDMI Audio none on TV working on monitor - possible eld issue

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https://bugs.freedesktop.org/show_bug.cgi?id=91371

--- Comment #9 from Andy Furniss <adf.lists at gmail.com> ---
Created attachment 117279
  --> https://bugs.freedesktop.org/attachment.cgi?id=117279&action=edit
debug/test diff

I played a bit more round this eld thing and it seems there is a bug - but it
looks like it's the same for older radeon dce as well, and "fixing" it doesn't
get me sound on the TV - it does of course make /proc/asound eld look saner.

The difference between my monitor and the TV is that the monitor has a speaker
layout block and the TV doesn't. So the monitor hits the the "if" in the
attached diff and the value of sadb[0] is 1. 

The TV hits the else and gets allocated a value of 5 which is commented as
stereo, but according to the edid sections of CEA B and D stereo is 1 and 5 is
just like I see in /proc/asound  Fl/Fr Fc.

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