[Bug 104093] New: DP audio not work on KBL(regression issue)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104093

            Bug ID: 104093
           Summary: DP audio not work on KBL(regression issue)
           Product: DRI
           Version: DRI git
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: quanxian.wang at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

kernel 4.9 works.
But from 4.10-rc1 failed
upstream 4.13 failed.

Including KBL-S/U/H/Y

HDA audio works
Legacy audio works
DP audio failed.

you can get the Ubuntu 17.10 release. It has the 4.13 kernel.
http://cdimage.ubuntu.com/ubuntu/daily-live/current/

It is easy to reproduce.

Reproduce Steps:
1)connector DP monitor with KBL
2) and run the command
speaker-test -t wav -c 2 -Dplughw:0,8
for HDA with plughw:0.7 (works)
for legacy with plughw:0.0 (works)
=== Machine Information including BIOS ==
Platform info:
OS: Ubuntu 17.04
Kernel: 4.10.0-9-generic
KBL-S
Processor: Kabylake DT Intel(R) Core(TM) i5-7600 CPU @ 3.50GHz, B0/S0/M0
Stepping, GT2(0x5912)
Bios: KBLSE2R1.R00.X063.P00.1610281021
KBL-H
Processor: Kabylake Halo, i5-7300HQ 2.5GHz, B0/S0/M0 Stepping, GT2(0x591B)
Bios: KBLSE2R1.R00.X063.P00.1610281021
KBL-U
Processor: KabyLake ULT, i7-7600U, 2.80GHz, H0/J0 Stepping, GT2 
Bios: KBLSE2R1.R00.X063.P00.1610281021
Details:
1. The host connect the DP port to display, and connect the headset to the DP
displayer.
2. Use the command "alsamixer " to adjust the audio to the best.
3. Use the command "aplay -l" to get the List of PLAYBACK Hardware Devices.
4. Use the command "speaker-test -c2 -t wav -Dhw:0,*" to check the audio, bus
the headset cannot hear any sound.
5. Use "cat /proc/asound/card0/eld#2.*" to get the displayer info, but cannot
get any info.

Currently seems APL-I not works too.

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