radeon: Use fences to gate entry to reclocking on <r600 (01434b4b) · Commits · 戴 / test

GUI idle interrupts don't seem to work terribly well on r500 and earlier, so let's use a fence instead. Signed-off-by:

drivers/gpu/drm/radeon/radeon_pm.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -76,6 +76,14 @@ static void radeon_pm_set_clocks(struct radeon_device *rdev, int static_switch)
		msecs_to_jiffies(RADEON_WAIT_IDLE_TIMEOUT));
		rdev->irq.gui_idle = false;
		radeon_irq_set(rdev);
		} else {
		struct radeon_fence *fence;
		radeon_ring_alloc(rdev, 64);
		radeon_fence_create(rdev, &fence);
		radeon_fence_emit(rdev, fence);
		radeon_ring_commit(rdev);
		radeon_fence_wait(fence, false);
		radeon_fence_unref(&fence);
		}
		radeon_unmap_vram_bos(rdev);