Just upgraded my BBB from factory image to Debian Jessie: https://debian.beagleboard.org/images/bone-debian-8.6-lxqt-4gb-armhf-2016-11-06-4gb.img.xz
With the old Wheezy image and the concept of virtual HDMI capes it was possible to disable HDMI audio while keeping HDMI video alive (uENv.txt: cape_disable=capemgr.disable_partno=BB-BONELT-HDMI). This step released all preallocated mcasp0-pins for other applications, e.g. for PRU0 access, while still having an HDMI display attached and running.
Now with Jessie (no more virtual capes) I have difficulties to realize such a scenario. Apparently there is no preconfigured DTB with capemgr, eMMC and HDMI enabled, but Audio disabled (see http://elinux.org/BeagleBone_DTBs). Also the last table at this page (http://elinux.org/Beagleboard:BeagleBone_Debian_Image_Migration) shows nothing more than a question mark for that particular case.
Does anyone have a suitable DTB (or *.dts) at hand or can point me to information how to generate such a file from existing device tree source files?
Thanks,
KK