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Commit 81c12f6e authored by Paulo Zanoni's avatar Paulo Zanoni Committed by Daniel Vetter
Browse files

drm/i915: POSTING_READ IPS_CTL before waiting for the vblank 



Make sure we write to IPS before we actually wait.

Signed-off-by: default avatarPaulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 6ceeeec0

drivers/gpu/drm/i915/intel_display.c

+1 −0
Original line number Diff line number Diff line
@@ -3386,6 +3386,7 @@ static void hsw_disable_ips(struct intel_crtc *crtc) 


	assert_plane_enabled(dev_priv, crtc->plane);

	I915_WRITE(IPS_CTL, 0);

	POSTING_READ(IPS_CTL);



	/* We need to wait for a vblank before we can disable the plane. */

	intel_wait_for_vblank(dev, crtc->pipe);