Bug 70524 - [DP audio] The ITE DP audio fails with certain display resolution settings, using intel-drm nightly build kernel
Summary: [DP audio] The ITE DP audio fails with certain display resolution settings, u...
Status: CLOSED WORKSFORME
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: x86 (IA32) Linux (All)
: medium major
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-10-16 09:07 UTC by Ken Lin
Modified: 2017-07-24 22:57 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:

Attachments
details info - wave forms and comparison results (423.09 KB, text/plain)
2013-10-16 09:07 UTC, Ken Lin 		no flags Details
issue details - wave forms and comparison results (423.09 KB, application/octet-stream)
2013-10-16 09:10 UTC, Ken Lin 		no flags Details
kernel log info -drm/hda debug info (240.54 KB, text/plain)
2013-10-16 09:12 UTC, Ken Lin 		no flags Details
intel reg info (10.07 KB, text/plain)
2013-10-16 09:13 UTC, Ken Lin 		no flags Details
bios info (8.27 KB, text/plain)
2013-10-16 09:13 UTC, Ken Lin 		no flags Details
Xorg log info (60.76 KB, text/plain)
2013-10-16 09:14 UTC, Ken Lin 		no flags Details
xrandr info (12.07 KB, text/plain)
2013-10-16 09:14 UTC, Ken Lin 		no flags Details
kernel version info (12 bytes, text/plain)
2013-10-16 09:15 UTC, Ken Lin 		no flags Details
kernel log info - drm debug only (206.56 KB, text/plain)
2013-10-17 00:38 UTC, Ken Lin 		no flags Details
View All

Description Ken Lin 2013-10-16 09:07:27 UTC 
Created attachment 87717 [details]
details info - wave forms and comparison results

The ITE DP audio fails with certain display resolution settings, using intel-drm nightly build kernel.
(1) Linux (5.1ch 44.1K) + IT6506 1280x1024 60HZ/DP 2 Lane LBR => Audio no output.
(2) Linux (5.1ch 44.1K) + IT6506 1920x1080 60HZ/DP 4 Lane LBR => Audio stable OK.
Comment 1 Ken Lin 2013-10-16 09:10:02 UTC 
Created attachment 87718 [details]
issue details - wave forms and comparison results
Comment 2 Ken Lin 2013-10-16 09:12:29 UTC 
Created attachment 87719 [details]
kernel log info -drm/hda debug info
Comment 3 Ken Lin 2013-10-16 09:13:10 UTC 
Created attachment 87720 [details]
intel reg info
Comment 4 Ken Lin 2013-10-16 09:13:35 UTC 
Created attachment 87721 [details]
bios info
Comment 5 Ken Lin 2013-10-16 09:14:04 UTC 
Created attachment 87722 [details]
Xorg log info
Comment 6 Ken Lin 2013-10-16 09:14:35 UTC 
Created attachment 87723 [details]
xrandr info
Comment 7 Ken Lin 2013-10-16 09:15:25 UTC 
Created attachment 87724 [details]
kernel version info
Comment 8 Ken Lin 2013-10-16 09:19:48 UTC 
1. The issues could also be reproducible in early kernel version 3.9.5 on Ivy/Haswell platforms
2. The issues don not exist in windows XP/7 on Ivy/Haswell platforms
Comment 9 Jani Nikula 2013-10-16 10:18:40 UTC 
(In reply to comment #2)
> Created attachment 87719 [details]
> kernel log info -drm/hda debug info

There logs are filled with HDMI being plugged, although there's some DP stuff at the end too. Just to make sure, are you seeing the problem with HDMI or DP? Please attach a dmesg with *only* the problematic case. It's hard enough to pick out the relevant bits from the logs even then.
Comment 10 Ken Lin 2013-10-17 00:13:18 UTC 
(In reply to comment #9)
> (In reply to comment #2)
> > Created attachment 87719 [details]
> > kernel log info -drm/hda debug info
> 
> There logs are filled with HDMI being plugged, although there's some DP
> stuff at the end too. Just to make sure, are you seeing the problem with
> HDMI or DP? Please attach a dmesg with *only* the problematic case. It's
> hard enough to pick out the relevant bits from the logs even then.


1. Use make menuconfig to define CONFIG_SND_DEBUG_VERBOSE in drm-intel-nightly kernel branch and re-install the kernel images in Fedora 19 on Haswell platform

2. Boot to Fedora 19 desktop and plug in a DP cable to connect the Haswell MB with DAC AMP board (DAC AMP board to DP monitor with another DP cable).
=> You could search "DP-1" keyword in the kernel log messages.

3. The DP monitor displays with pre-configured 1280x1024 then we launched the speaker-test GUI settings to test 5.1ch DP audio function
=> I think you could check "patch_hdmi.c" keyword for DP audio setting info in the kernel log messages.


Please check the wave form document (in PDF) that I attached to this tracking thread for the details. I don't know if the issue results from the DP signal fine-tunes or incorrect audio data source (since it works with windows 7/XP drivers on the same platform) 
 



CONNECTOR:16:DP-1
CONFIG_SND_DEBUG_VERBOSE
Comment 11 Ken Lin 2013-10-17 00:38:27 UTC 
Created attachment 87767 [details]
kernel log info  - drm debug only

the kernel messages with the removal of CONFIG_SND_DEBUG_VERBOSE
Comment 12 Ken Lin 2013-10-18 02:08:15 UTC 
I'm not sure if DP Lane setting for data transfer would be the key to this case.
I would help test and debug if you could provide me with the relevant source update.

(1) Linux (5.1ch 44.1K) + IT6506 1280x1024 60HZ/DP 2 Lane LBR => Audio no output.
(2) Linux (5.1ch 44.1K) + IT6506 1920x1080 60HZ/DP 4 Lane LBR => Audio stable OK
Comment 13 Antti Koskipaa 2014-07-01 11:25:14 UTC 
Is this still an issue with the latest kernel? Please retest.
Comment 14 Jani Nikula 2014-09-05 09:24:38 UTC 
Timeout, closing. Please reopen if the problem persists with recent kernels.

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