[Bug 91463] radeon/audio:HDMI audio not working since upgrade from 3.19.3 to 4.0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91463

            Bug ID: 91463
           Summary: radeon/audio:HDMI audio not working since upgrade from
                    3.19.3 to 4.0
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: shimi.chen at gmail.com

OS: Arch Linux (64 bit)
Laptop model: Dell Studio 1555
Graphics card: Radeon HD 4570

HDMI audio stopped working since upgrade to linux kernel 4.0.
Reverting to 3.19.3 fixes the issue for me.
Tried James's patch from bug 90777 (revert commit
8ffea8570d5a7e9dd3c10349ebc3bd79487ae30b) on kernel 4.1 and it did not help.
Tried using the mainline 4.2rc3 kernel and the bug persists.

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