[Bug 101835] [APL] HDMI 2.0 port cannot pass through Dolby TrueHD and DTS-HD under Linux

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Aug 8 19:23:57 UTC 2017


https://bugs.freedesktop.org/show_bug.cgi?id=101835

--- Comment #8 from Elizabeth <elizabethx.de.la.torre.mena at intel.com> ---
(In reply to Johnny Chen from comment #7)
> Hi Elizabeth,
> Do you have any updates? Thank you!!
Hello Johnny,
It seems that Jani found the probable root-cause of this problem,
(In reply to Jani Nikula from comment #4)
> (In reply to Joseph Nuzman from comment #0)
> > Observation:  on all working kernels, audio connection type is detected as
> > "DisplayPort".  On failing kernels, audio connection type is "HDMI".
> 
> This is possibly the key. The HDMI 2.0 ports on SKL/KBL NUCs have an
> internal DP->HDMI converter called LSPCON. It looks like DP to the driver.
A different approach is going to be taken, working all the problems at once.
(In reply to Jani Nikula from comment #9)
> Okay, I may be conflating some bugs here, but HD audio over LSPCON is
> problematic. Marking as dupe.
> 
> *** This bug has been marked as a duplicate of bug 101583 ***
Please refer to bug 101583 to keep track of the problem. Updates are going to
be added in that bug, and new information also will be asked there when needed.
Hopefully this will lead to the solution. 
Thanks for your patience.

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