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drm/radeon/kms: add support for gui idle interrupts (v4)

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Useful for certain power management operations.  You
need to wait for the GUI engine (2D, 3D, CP, etc.) to be
idle before changing clocks or adjusting engine parameters.

(v2) Fix gui idle enable on pre-r6xx asics

(v3) The gui idle interrrupt status bit is permanently asserted
on pre-r6xx chips, but the interrrupt is still generated.
workaround it in the driver.

(v4) Add support for evergreen

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher
2010-04-22 12:52:11 -04:00
committed by Dave Airlie
parent def9ba9cf6
commit 2031f77ca9
9 changed files with 74 additions and 1 deletions
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1
drivers/gpu/drm/radeon/radeon_device.c
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@@ -602,6 +602,7 @@ int radeon_device_init(struct radeon_device *rdev,
rwlock_init(&rdev->fence_drv.lock);
INIT_LIST_HEAD(&rdev->gem.objects);
init_waitqueue_head(&rdev->irq.vblank_queue);
init_waitqueue_head(&rdev->irq.idle_queue);
/* setup workqueue */
rdev->wq = create_workqueue("radeon");