[Bug 70524] [DP audio] The ITE DP audio fails with certain display resolution settings, using intel-drm nightly build kernel

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70524

--- Comment #10 from Ken Lin <ken.lin at advantech.com.tw> ---
(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

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