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2a2b8fa628
There were a few potential problems with the original page_flip/vblank code in mdp4_crtc. 1) We need vblank irq for a couple things, both completing flips and updating cursor. We need to keep track of what work is pending so that (for example) a cursor update while we are still waiting for pageflip_cb (ie. pageflip requested from userspace, but still waiting for rendering to complete) would not prematurely trigger event to userspace. 2) A preclose -> pageflip-cancel should not cancel a pageflip that was requested on a different file (ie. non-master closing should not cancel a pending pageflip). With these fixes, we no longer have problems w/ cursor not updating and with occasional hangs with userspace waiting for a pageflip that had been cancelled (launching XBMC from gnome-shell overview mode was a good way to trigger this, but now works reliably). Signed-off-by: Rob Clark <robdclark@gmail.com>