When I connect my Xbox Series X directly to TV (an LG CX), and connect TV's eARC port to HW-Q950A's eARC port,
and setup TV's eARC to bitstream passthrough, Xbox will tell me my home theater doesn't support Dolby Atmos when I choose output format as Dolby Atmos for Home Theater.
If I connect my Xbox to Q950A's HDMI IN ports , then I can choose Dolby Atmos for Home Theater normally, but I will lose HDMI 2.1 features since Q950A is HDMI 2.0.
I think the cause of this is HW-Q950A doen's advertise its Dolby MAT capability on eARC port.
Please add Dolby MAT 2.0/2.1 support on HW-Q950A's eARC in future firmware update.
Since Xbox Series S|X、Xbox One S/X and Dolby Access on Windows 10 all use Dolby MAT 2.0 as Dolby Atmos output format, this will benefit users of these devices.
I've got my XBOX Series X plugged into my Q90A Samsung TV HDMI 2.1 Port 4, and my sound bar Samsung Q950A plugged into HDMI eARC port 3 on TV and no issues with Dolby Atmos.