[Bug 215631] New: Some Desktop oriented mode setting drivers are missing DRM PRIME support

[bugzilla-daemon at kernel.org]

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 at kernel-bugs.osdl.org
          Reporter: bluescreen_avenger at 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

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