On Fre, 2014-02-21 at 21:03 +0200, ville.syrjala@linux.intel.com wrote:
We can kill of the drm_vblank_{pre,post}_modeset() calls since those are there simply to make drm_vblank_get() fail during a modeset.
Actually, their original purpose was to keep the DRM vblank counter consistent across modesets, assuming the modeset resets the hardware vblank counter.