https://bugs.freedesktop.org/show_bug.cgi?id=38800 --- Comment #23 from Jerome Glisse <glisse@xxxxxxxxxxxxxxx> 2011-07-06 14:25:54 PDT --- So what exactly the timestamp should correspond to ? For me vblank is good enough and looking at specification its says that it's when the hw register are using the new value. So either you consider that's when vblank occur or that's at the end of vblank when the new buffer start being scanout. Still i think this is achievable with Simon patch which simplify this whole process to: So : pflip_ioctl if (invblank) wait; update crtc reg enable irq and ask for vblank or pageflip completed irq irq handler: report proper timestamp For older hw we could either accept the error margin due to interrupt happening on vblank or we could compute how much time is needed for vblank to end and add it to timestamp. This change would remove complexity or least confine it to the timestamp computation. I don't think we can count too much on fast irq handling. -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
