On Fri, 23 Sep 2011 11:21:29 +0100, Chris Wilson <[email protected]> wrote: > On SandyBridge in order to receive an event on the RENDER ring, you > first must unmask the corresponding bit in the DERRMR (Display Engine > Render Response Mask Register). This register is not accessible from a > non-secure MI_LOAD_REGISTER_IMM so resort to unmasking all events upon > initialisation. Presumably this leads to an undesirable increase in PCI > traffic (possibly 4 additional wakeups per vblank per active pipe).
I should mention that my docs have this as SNB only, but that seems a little strage... -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
