[PATCH 11/20] drm/i915: Do not reset display when display is disabled

[José Roberto de Souza]

Display is disabled in the beginning of the reset and re-enabled
afterreset each engine needed but if the display is disabled we
should not do it.

Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/i915_irq.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 2e242270e270..e7f551909bfe 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -3173,7 +3173,8 @@ static void i915_reset_device(struct drm_i915_private *dev_priv,
 
 	/* Use a watchdog to ensure that our reset completes */
 	i915_wedge_on_timeout(&w, dev_priv, 5*HZ) {
-		intel_prepare_reset(dev_priv);
+		if (INTEL_INFO(dev_priv)->num_pipes)
+			intel_prepare_reset(dev_priv);
 
 		error->reason = reason;
 		error->stalled_mask = engine_mask;
@@ -3199,7 +3200,8 @@ static void i915_reset_device(struct drm_i915_private *dev_priv,
 		error->stalled_mask = 0;
 		error->reason = NULL;
 
-		intel_finish_reset(dev_priv);
+		if (INTEL_INFO(dev_priv)->num_pipes)
+			intel_finish_reset(dev_priv);
 	}
 
 	if (!test_bit(I915_WEDGED, &error->flags))
-- 
2.19.1