[Bug 91410] New: [BDW][Audio][HD-A Display] DP/HDMI audio playback abnormal

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91410

            Bug ID: 91410
           Summary: [BDW][Audio][HD-A Display] DP/HDMI audio playback
                    abnormal
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: han.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 117270
  --> https://bugs.freedesktop.org/attachment.cgi?id=117270&action=edit
set the same bclk_m/bclk_n for 675000 as for 337500

System Environment
=======
CRB:SawTooth Peak
Platform: Broadwell-U
CPU: Broadwell U F0
Chipset PCH: Wildcat Point –LP B0
Audio card: ALC286S
BIOS: BDW-E1R1.86C.0093.R00.1409071941
Kernel:4.2.0-rc1_drm-intel-nightly
Tree: git://anongit.freedesktop.org/drm-intel
Branch:Drm-intel-nightly
Commit:b42fa27abff5970649ff07b0ce1691f6464097f3

Bug detailed description
=======
Play sound clip through DP or HDMI port. The DP output is distorted, sounds
like be played in half sample rate; The HDMI output is muted.
Analog output is OK.

Reproduce Steps
==============
1. boot up
2. assume DP/HDMI playback device is hw:0,3, run
    $ speaker-test -D hw:0,3 -c 2 -t wav

Expected Result
=============
Output repeated voice "Front Left; Front Right"

Actual Result
===========
DP output repeated slow voice "F-r-o-n-t--L-e-f-t, F-r-o-n-t--R-i-g-h-t";
HDMI output cannot be heard.

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