Hi, a resend of updated versions of the earlier patches: Patch 1 should really get into Linux 4.1 to avoid tegra breaking user-space clients.
Patch 2 reviewed-by Michel, updated to take his feedback into account. Patch 3 is modified to not conflict with Daniel Vetter's patch "drm/vblank: Fixup and document timestamp update/read barriers" Patch 4 will be needed for drm/qxl to compile with Daniel's fixup patch applied. thanks, -mario
