https://bugzilla.kernel.org/show_bug.cgi?id=215631

Bug ID: 215631 Summary: Some Desktop oriented mode setting drivers are missing DRM PRIME support Product: Drivers Version: 2.5 Kernel Version: 5.14 Hardware: Intel OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: bluescreen_avenger@verizon.net Regression: No

Hi

It seems that not all Desktop GPU oriented DRM drivers support PRIME, which it now appears that wlroots requires. Seeing that even SimpleDRM supports PRIME though, I think that it should be possible for other drivers.

The drivers appear to be ast gma500 bochs i2c vboxvideo These are the ones that Debian has turned on that to my knowledge are missing this support, so that is what I am considering to be a Desktop GPU, although I might be wrong. I admit I am being very x86-centric.

I am not sure if I should open a separate bug for each driver, However I am not able to test all of them, as I really can only test the two virtual ones. The others I am going by grepping the kernel source for lines that I have been told to check for, and an online database https://drmdb.emersion.fr/capabilities

I am invested in this because I think pairing the wlroots based cage with a terminal emulator like foot is probably the best solution, and in a recent release of wlroots, DRM Prime is a hard requirement. (probably for how they do multiple GPUs, I am not sure)

Thanks