On Thu, 2018-03-15 at 10:11 +0100, Lucas Stach wrote: > Right now the vblank event completion is racing with the atomic update, > which is especially bad when the PRE is in use, as one of the hardware > issue workaround might extend the atomic commit for quite some time. > > If the vblank IRQ happens to trigger during that time, we will prematurely > signal the atomic commit completion to userspace, which causes tearing > when userspace re-uses a framebuffer we haven't managed to flip away from > yet. > > Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx> This trades the tiny (on i.MX6Q) or not so tiny (on i.MX6QP) risk of returning a vblank event completion too early for the tiny risk to miss a vsync interrupt, and to return a vblank event completion a frame too late. Applied to imx-drm/fixes. regards Philipp _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
