On 18 December 2018 5:03:22 am AEDT, Emil Velikov <emil.l.veli...@gmail.com> wrote: >Hi Christopher, > >On Tue, 20 Nov 2018 at 04:30, Christopher James Halse Rogers ><christopher.halse.rog...@canonical.com> wrote: >> >> I have wanted this code in Mir, so it's plausibly useful elsewhere, >> particularly if the DRM device major number is going to become >> dynamic. >> >Can you elaborate/link to the code that uses the major/minor? >Fiddling with those manually is rather error prone most often than not.
We have an internal API that mirrors that of logind - taking a (major,minor) pair and returning a usable fd. For input devices, that just means opened O_NONBLOCK; for DRM devices it means calling SetMaster. Here's the relevant (non-logind) implementation: https://github.com/MirServer/mir/blob/master/src/server/console/linux_virtual_terminal.cpp#L634 Since we by necessity end up pulling out the devnode I guess we could match on a /dev/dri prefix instead. I just noticed this function while doing the drmIsMaster patch and thought it would be convenient for us! _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
