drm: Rework vblank-wait handling to allow interrupt reduction.
commit0a3e67a4caac273a3bfc4ced3da364830b1ab241
authorJesse Barnes <jbarnes@virtuousgeek.org>
Tue, 30 Sep 2008 19:14:26 +0000 (30 12:14 -0700)
committerDave Airlie <airlied@linux.ie>
Fri, 17 Oct 2008 21:10:11 +0000 (18 07:10 +1000)
tree02a2e5e76d9dffcb556d09b0eee4d34ebe5d81cb
parent2df68b439fcb97a4c55f81516206ef4ee325e28d
drm: Rework vblank-wait handling to allow interrupt reduction.

Previously, drivers supporting vblank interrupt waits would run the interrupt
all the time, or all the time that any 3d client was running, preventing the
CPU from sleeping for long when the system was otherwise idle.  Now, interrupts
are disabled any time that no client is waiting on a vblank event. The new
method uses vblank counters on the chipsets when the interrupts are turned
off, rather than counting interrupts, so that we can continue to present
accurate vblank numbers.

Co-author: Michel Dänzer <michel@tungstengraphics.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
21 files changed:
drivers/gpu/drm/drm_drv.c
drivers/gpu/drm/drm_irq.c
drivers/gpu/drm/i915/i915_dma.c
drivers/gpu/drm/i915/i915_drv.c
drivers/gpu/drm/i915/i915_drv.h
drivers/gpu/drm/i915/i915_irq.c
drivers/gpu/drm/mga/mga_drv.c
drivers/gpu/drm/mga/mga_drv.h
drivers/gpu/drm/mga/mga_irq.c
drivers/gpu/drm/r128/r128_drv.c
drivers/gpu/drm/r128/r128_drv.h
drivers/gpu/drm/r128/r128_irq.c
drivers/gpu/drm/radeon/radeon_cp.c
drivers/gpu/drm/radeon/radeon_drv.c
drivers/gpu/drm/radeon/radeon_drv.h
drivers/gpu/drm/radeon/radeon_irq.c
drivers/gpu/drm/via/via_drv.c
drivers/gpu/drm/via/via_drv.h
drivers/gpu/drm/via/via_irq.c
include/drm/drm.h
include/drm/drmP.h