[Bug 270033] graphics/drm-kmod HDMI audio slow motion on Intel Broadwell (HDMI/DP 8ch)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270033

            Bug ID: 270033
           Summary: graphics/drm-kmod HDMI audio slow motion on Intel
                    Broadwell (HDMI/DP 8ch)
           Product: Ports & Packages
           Version: Latest
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: x11@FreeBSD.org
          Reporter: n.diablo.n.f@list.ru
             Flags: maintainer-feedback?(x11@FreeBSD.org)
          Assignee: x11@FreeBSD.org

Hello! I recently installed FreeBSD 13.1 on an HP ProBook 450 G2 laptop.
Installed the latest version of the drm-kmod package. And I ran into a problem:
the sound through hdmi sounds slowed down by about half (the video also slows
down during playback). This behavior is independent of the sound source (even
cat /dev/urandom > /dev/dsp0.0 will be heard slowly). I studied the problem and
realized that it is rare, but sometimes it appears. In the Linux environment,
it skipped around 2016 and did not pop up after.

Some links:
1.
https://forums.freebsd.org/threads/freebsd-13-0-hdmi-audio-slow-motion.79042/page-2
2. https://github.com/FreeBSDDesktop/DEPRECATED-freebsd-base-graphics/issues/36
3. https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1620854
4. https://bbs.archlinux.org/viewtopic.php?id=192628

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