[PATCH 17/24] drm/i915: disable pipe DDI function when disabling pipe

[eugeni.dodonov at intel.com (Eugeni Dodonov)]

Signed-off-by: Eugeni Dodonov <eugeni.dodonov at intel.com>
---
 drivers/gpu/drm/i915/intel_display.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 5be2ff1..b7e50af 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1627,6 +1627,16 @@ static void intel_disable_pipe(struct drm_i915_private *dev_priv,
 
 	I915_WRITE(reg, val & ~PIPECONF_ENABLE);
 	intel_wait_for_pipe_off(dev_priv->dev, pipe);
+
+	/* On HSW, disable pipe DDI function the pipe */
+	if (IS_HASWELL(dev_priv->dev)) {
+		val = I915_READ(DDI_FUNC_CTL(pipe));
+		val &= ~PIPE_DDI_PORT_MASK;
+		val &= ~PIPE_DDI_FUNC_ENABLE;
+		I915_WRITE(DDI_FUNC_CTL(pipe),
+				val);
+	}
+
 }
 
 /*
-- 
1.7.10