Bug 96601

Summary: [BYT/CHT LPE audio] Cherrytrail With HDMI Audio patch causes GPU Hang
Product: DRI Reporter: Tyler <tyeo098>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED NOTOURBUG QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: intel-gfx-bugs
Version: XOrg git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: BSW/CHT, BYT i915 features: display/audio
Attachments:
Description Flags
dmesg none

Description Tyler 2016-06-20 19:22:37 UTC 
Created attachment 124624 [details]
dmesg

Compiling kernel 4.6.2 https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.6.2.tar.xz
With patch from http://pastebin.com/kZyiZMR5 to enable HDMI audio causes GPU hangs when playing a video. 

desktop:~$ uname -m
x86_64
desktop:~$ uname -r
4.6.2
desktop:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 16.04 LTS
Release:	16.04
Codename:	xenial

Connected over HDMI

Dmesg and GPU hang log attached
Comment 1 Jani Nikula 2016-06-21 10:46:39 UTC 
(In reply to Tyler from comment #0)
> With patch from http://pastebin.com/kZyiZMR5 to enable HDMI audio causes GPU
> hangs when playing a video. 

We can't support patches that have not been merged upstream. Please reopen if you can reproduce the problem with upstream kernels.
Comment 2 Tyler 2016-06-21 13:27:06 UTC 
Roger.
The problem is when I use an upstream kernel I get no audio at all.
Comment 3 Jani Nikula 2016-06-21 15:17:52 UTC 
I don't know where the "Skylake" part comes from, this is about missing LPE audio support for certain BYT/CHT models. Sure, some i915 bits and pieces are needed for that as well, but the main thing is the audio driver. Can't help you with that, sorry.

Updating the bug details for posterity.

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