[Bug 94439] [BXT-P/APL] DP and HDMI will stop output after resumed from S3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94439

Lu, Han <han.lu at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      i915 features|                            |display/HDMI
      i915 platform|                            |BXT
           Priority|medium                      |high
                 CC|                            |han.lu at intel.com

--- Comment #1 from Lu, Han <han.lu at intel.com> ---
Update: regression is found with drm-intel-testing-2016-02-29, the detailed
results show as following:
Case 1: only eDP connected
S3 is normal for the first time, but system will hang there (resuming more than
10 mins) when do S3 again 
Case 2: only DP connected
Unable to resume from S3(resuming more than 10 mins).
Case 3: only HDMI connected 
Unable to resume from S3(resuming more than 10 mins).
Case 4: DP and HDMI connected 
Unable to resume from S3(resuming more than 10 mins).
Case 5: eDP and DP connected
System can resume normally from S3 for the first time, but DP stop working.
System will hang there when do S3 again.
Case 6: eDP and HDMI connected
System can resume normally form S3 for the first 1-2 times, but HDMI stop
working. System will hang there when do S3 again.
Case 7: eDP, DP and HDMI all connected
No output from DP and HDMI and the resuming time is more than 5 mins. After
system resumed, the analog audio is works well. But system will hang there when
do S3 again.

Test Environment:
Platform: Apollo lake RVP1a FabA
BIOS: APLKRVPA.X64.0119.R10.1601031622
KSC FW:1.05
BXT SOC : A0
GOP : 10.0.1022
Board ID: APL RVP 1A (01)
CPU Flavor: BXT Tablet (0)
FAB ID: FAB1
Total Memory : 8GB
Kernel:4.5.0-rc5+
Tree: git://anongit.freedesktop.org/drm-intel
Branch:drm-intel-testing
Commit: a27657a39741599ce9feef1ef39ae6654e9e6768
tag ID: drm-intel-testing-2016-02-29

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