[Bug 107001] New: Radeon HDMI audio lost after resuming from suspend

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=107001

            Bug ID: 107001
           Summary: Radeon HDMI audio lost after resuming from suspend
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.2.0
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: timo.valtoaho@gmail.com
        Regression: No

Created attachment 191781
  --> https://bugzilla.kernel.org/attachment.cgi?id=191781&action=edit
output of scripts/ver_linux

After switching to 4.2 series, I noticed that audio through HDMI was gone after
first suspend/resume cycle (systemctl suspend). I can get audio back with some
simple operations, like executing xrand, lanching gnome-control-center or
swithcing to a virtual terminal (ctrl+alt+F1). All of these operations will
restore audio.

I have tested this out, and it was 4.2-rc2 that introduced this issue, and is
still present in 4.3-rc7. Also, it doesn't matter whether radeon driver is a
module or compiled in with required firmware.

System is Debian Jessie (8.2), Gnome

Output of scripts/ver_linux:

Attached files:

output of scripts/ver_linux
output of lspci -vvv

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