drm/i915: Include power-management state in gpu error dump

Useful for double checking that the device is powered up when it hung,
include both the status of the power management and our rpm wakelock.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170302151544.16915-1-chris@chris-wilson.co.uk
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>

drivers/gpu/drm/i915/i915_drv.h

@@ -935,6 +935,8 @@ struct i915_gpu_state {
 	char error_msg[128];
 	bool simulated;
 	bool awake;
+	bool wakelock;
+	bool suspended;
 	int iommu;
 	u32 reset_count;
 	u32 suspend_count;

drivers/gpu/drm/i915/i915_gpu_error.c

@@ -633,6 +633,8 @@ int i915_error_state_to_str(struct drm_i915_error_state_buf *m,
 	}
 
 	err_printf(m, "GT awake: %s\n", yesno(error->awake));
+	err_printf(m, "RPM wakelock: %s\n", yesno(error->wakelock));
+	err_printf(m, "PM suspended: %s\n", yesno(error->suspended));
 	err_printf(m, "EIR: 0x%08x\n", error->eir);
 	err_printf(m, "IER: 0x%08x\n", error->ier);
 	for (i = 0; i < error->ngtier; i++)
@@ -1617,6 +1619,8 @@ static void i915_capture_gen_state(struct drm_i915_private *dev_priv,
 				   struct i915_gpu_state *error)
 {
 	error->awake = dev_priv->gt.awake;
+	error->wakelock = atomic_read(&dev_priv->pm.wakeref_count);
+	error->suspended = dev_priv->pm.suspended;
 
 	error->iommu = -1;
 #ifdef CONFIG_INTEL_IOMMU