9 Apr
2019
9 Apr
'19
8:47 a.m.
Hi,
Should we add something like DRM_PRIME_CAP_SAME_DEVICE?
Yeah I expect we need some sort of same device only capability, so that dri3 userspace can work.
If we just fail importing in these cases what happens? userspace just gets confused, I know we used to print a backtrace if we hit the mmap path, but if we didn't do that what happens?
Well, we printed a backtrace and returned -EINVAL. So it looked a bit scary due to the backtrace which is usually printed for more serious problems. But we also returned a proper error code.
Userspace was not happy. It was wayland (gnome-shell) which ran into it it, and it didn't came up with a working display.
cheers, Gerd