Mario Kleiner <mario.kleiner.de at gmail.com> writes: > With instantaneous high precision vblank timestamping > that updates at leading edge of vblank, the emulated > "hw vblank counter" from vblank timestamping which > increments at leading edge of vblank, and reliable > page flip execution and completion at leading edge > of vblank, we should meet the requirements for fast > vblank irq disable/enable. > > Testing against rpi-4.12-rc5 Linux kernel with timing > measurement equipment indicates this works fine, > so allow immediate vblank disable for power saving. > > For debugging in case of unexpected trouble, booting > with kernel cmdline option drm.vblankoffdelay=0 > would keep vblank irqs on to approximate old behavior. > > Signed-off-by: Mario Kleiner <mario.kleiner.de at gmail.com> > Cc: Eric Anholt <eric at anholt.net> If you can spin this against drm-misc-next instead of the downstream tree, I can get it applied. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 832 bytes Desc: not available URL: <https://lists.freedesktop.org/archives/amd-gfx/attachments/20170621/dd425031/attachment.sig>
