Dave Airlie wrote the dirty handling code, so Cc:ing him. I suspect transitioning offb over to a similar design would be fine by him.
On Mon, Jul 23, 2012 at 04:40:21PM +1000, Benjamin Herrenschmidt wrote: > On Wed, 2012-06-27 at 17:25 -0500, Anthony Liguori wrote: > > > If a user asks for something and we can't make it work, we should fail. > > Note that QEMU's cirrus works fine with the new kernel cirrusdrmfb, so > I say we should allow it (needs to be able to the powerpc device .mak > as well tho. > > It shouldn't be primary because old RHEL's iirc used to have cirrusfb > enabled and that would blow due to guest kernel bugs among others. > > I haven't had a chance to try whatever userspace DDX the Xorg folks have > come up with to use on top of cirrusdrmfb, so that might need a bit of > fixing but there's no reason not to allow -vga cirrus at this point. > > Note to Matthew: cirrusdrmfb is a LOT SLOWER than offb for a similar > SW only dumb framebuffer, probably has to do with the way it does the > "dirty" stuff, not sure ... > > Why not draw directly into the emulated vram ? > > Cheers, > Ben. > > > -- Matthew Garrett | mj...@srcf.ucam.org
