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drm/radeon/kms: wait for gpu idle before changing power mode 

set proper wait condition as noted by Rafał Miłecki.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2010-03-17 14:29:15 -04:00 committed by Dave Airlie
parent 2031f77ca9
commit ef6e6cf56a
1 changed files with 10 additions and 0 deletions
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10
drivers/gpu/drm/radeon/radeon_pm.c
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@ -378,6 +378,16 @@ static void radeon_pm_set_clocks(struct radeon_device *rdev)
radeon_get_power_state(rdev, rdev->pm.planned_action);
mutex_lock(&rdev->cp.mutex);
/* wait for GPU idle */
rdev->pm.gui_idle = false;
rdev->irq.gui_idle = true;
radeon_irq_set(rdev);
wait_event_interruptible_timeout(
rdev->irq.idle_queue, rdev->pm.gui_idle,
msecs_to_jiffies(RADEON_WAIT_IDLE_TIMEOUT));
rdev->irq.gui_idle = false;
radeon_irq_set(rdev);
if (rdev->pm.active_crtcs & (1 << 0)) {
rdev->pm.req_vblank |= (1 << 0);
drm_vblank_get(rdev->ddev, 0);