On 21.01.2016 19:08, Daniel Vetter wrote: > These should be functionally equivalent to the older per/post modeset > functions, except that they block out drm_vblank_get right away. > There's only the clock adjusting code (outside of pageflips) in > readone which uses drm_vblank_get. But that code doesn't synchronize > against concurrent modesets and instead handles any such races by > waiting for the right vblank to arrive with a short timetout. > > The longer-term plan here is to switch all kms drivers to > drm_vblank_on/off so that common code like pending event cleanup can > be done there, while drm_vblank_pre/post_modeset will be purely > drm internal for the old UMS ioctl. > > Note that with this patch Michel uncovered a bug in the dri3 > implementation of the DDX (it does vblank waits when the pipe is off), > which had to be fixed first. > > Cc: Michel Dänzer <michel.daenzer@xxxxxxx> > Acked-and-tested-by: Michel Dänzer <michel.daenzer@xxxxxxx> > Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx> Note that this should be rebased onto Mario's PM fixes, but those might go to 4.5 / stable anyway. -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
