[Intel-gfx] [RFC 03/30] drm/i915: wait for idle DDI_BUF_CTL after disabling it

[Paulo Zanoni]

From: Paulo Zanoni <paulo.r.zanoni at intel.com>

Missing from intel_ddi_dpms.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
---
 drivers/gpu/drm/i915/intel_ddi.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index b8b7670..4fd22ae 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -787,6 +787,9 @@ void intel_ddi_dpms(struct drm_encoder *encoder, int mode)
 	 */
 	I915_WRITE(DDI_BUF_CTL(port),
 			temp);
+
+	if (mode != DRM_MODE_DPMS_ON && (temp & DDI_BUF_CTL_ENABLE))
+		intel_wait_ddi_buf_idle(dev_priv, port);
 }
 
 static void intel_ddi_disable_pipe(struct drm_i915_private *dev_priv,
-- 
1.7.11.2