On 07/17/2013 03:01 PM, Chad Versace wrote:
On 07/17/2013 02:42 PM, Chris Wilson wrote:
On Wed, Jul 17, 2013 at 02:28:55PM -0700, Chad Versace wrote:
Set MOCS to L3_CACHEABLE for the following packets, during the normal
draw upload path and during blorp:
SURFACE_STATE
3DSTATE_DEPTH_BUFFER
3DSTATE_HIER_DEPTH_BUFFER
3DSTATE_STENCIL_BUFFER
It's not possible to set the MOCS of the MCS buffer, because the MCS
inherits MOCS from the parent surface.
Do you not have to worry about scanout coherency (e.g. frontbuffer
rendering)?
I forgot about that. We also may need to worry about the case where
the compositor un-redirects the fullscreen client.
I don't how to detect if the color buffer is the scanout buffer. And,
given that the compositor may un-redirect the client when fullscreen,
I wouldn't trust any half-baked ideas I have on how to do that detection.
Any advice?
I wish the hardware were magical and would ignore the MOCS for the
scanout buffer, but I haven't found that magic in the hw docs.
Per the IRC discussion, I verified that this doesn't matter on HSW. That is,
setting L3_cacheable in MOCS doesn't corrupt rendering, even for fullscreen
non-composited apps.
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