search for: vblankoffdelay

This patch series sets dev->vblank_disable_immediate = true on radeon/amdgpu-kms, nouveau-kms for nv50+, and vc4 for the real kms driver (as opposed to dispmanx firmware backed kms). All the drivers should be ready in theory, given their implementation, for fast vblank disable/enable. In practice, i have performed timing tests with my measurement equipment for all those drivers with the

...blank 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. --------------...

...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> --- drivers/gpu/drm/vc4/vc4_kms.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/...