No sound over hdmi

[Alex Gurenko]

Hello everyone, I found myself in a need to connect my Lenovo T460p laptop over HDMI to a
TV and I have no sound going over HDMI.
 I saw a thread about 4 months ago with no solution found back then.
I'm on Fedora 29 KDE, kernel 4.20.13-200.fc29.x86_64. I don't see that HDMI audio
device becomes active neither via cli, no in gui. Video output works perfectly fine.
I'm using bumblebee with nvidia proprietary drivers, not sure if that's relevant;
aplay -l shows that HDMI is handled by intel's graphics:

**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC293 Analog [ALC293 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 10: HDMI 4 [HDMI 4]
Subdevices: 1/1
Subdevice #0: subdevice #0

Found these two BZs [0][1] which kind of indicates it's been broken since F28:
[0] https://bugzilla.redhat.com/show_bug.cgi?id=1684943
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1664816

Any ideas what can be done here?