[Intel-gfx] [PATCH 14/15] drm/i915: check the power well on i915_pipe_enabled

[Paulo Zanoni]

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

This fixes "unclaimed register" messages when the power well is
disabled and there's a GPU hang.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
---
 drivers/gpu/drm/i915/i915_irq.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 29b1bb1..aefc674 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -129,6 +129,9 @@ i915_pipe_enabled(struct drm_device *dev, int pipe)
 	enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
 								      pipe);
 
+	if (intel_power_well_is_down(dev) && cpu_transcoder != TRANSCODER_EDP)
+		return false;
+
 	return I915_READ(PIPECONF(cpu_transcoder)) & PIPECONF_ENABLE;
 }
 
-- 
1.7.10.4