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drm/i915: add get_vblank_counter function for GM45

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As discussed in the long thread about vblank related timeouts, it turns out
GM45 has different frame count registers than previous chips.  This patch
adds support for them, which prevents us from waiting on really stale
sequence values in drm_wait_vblank (which rather than returning immediately
ends up timing out or getting interrupted).

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Dave Airlie <airlied@linux.ie>
This commit is contained in:
Jesse Barnes
2009-02-06 10:22:41 -08:00
committed by Dave Airlie
parent 14d200c5e5
commit 9880b7a527
5 changed files with 24 additions and 1 deletions
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1
drivers/gpu/drm/i915/i915_drv.c
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@@ -112,7 +112,6 @@ static struct drm_driver driver = {
.suspend = i915_suspend,
.resume = i915_resume,
.device_is_agp = i915_driver_device_is_agp,
.get_vblank_counter = i915_get_vblank_counter,
.enable_vblank = i915_enable_vblank,
.disable_vblank = i915_disable_vblank,
.irq_preinstall = i915_driver_irq_preinstall,