[Intel-gfx] [PATCH 2/3] drm/i915: Don't frob with RPS around GPU reset

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Based on my observations GPU reset doesn't clobber the RPS state, so
frobbing with RPS around GPU reset seems rather pointless. Just get
rid of it.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_drv.c  | 11 -----------
 drivers/gpu/drm/i915/intel_drv.h |  1 -
 drivers/gpu/drm/i915/intel_pm.c  |  9 ---------
 3 files changed, 21 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index dba03c026151..3794dc67caa4 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -930,8 +930,6 @@ int i915_reset(struct drm_i915_private *dev_priv)
 	unsigned reset_counter;
 	int ret;
 
-	intel_reset_gt_powersave(dev_priv);
-
 	mutex_lock(&dev->struct_mutex);
 
 	/* Clear any previous failed attempts at recovery. Time to try again. */
@@ -994,15 +992,6 @@ int i915_reset(struct drm_i915_private *dev_priv)
 
 	mutex_unlock(&dev->struct_mutex);
 
-	/*
-	 * rps/rc6 re-init is necessary to restore state lost after the
-	 * reset and the re-install of gt irqs. Skip for ironlake per
-	 * previous concerns that it doesn't respond well to some forms
-	 * of re-init after reset.
-	 */
-	if (INTEL_INFO(dev)->gen > 5)
-		intel_enable_gt_powersave(dev_priv);
-
 	return 0;
 
 error:
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 0741b2d3aa65..ca3b69b61f06 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1652,7 +1652,6 @@ void intel_cleanup_gt_powersave(struct drm_i915_private *dev_priv);
 void intel_enable_gt_powersave(struct drm_i915_private *dev_priv);
 void intel_disable_gt_powersave(struct drm_i915_private *dev_priv);
 void intel_suspend_gt_powersave(struct drm_i915_private *dev_priv);
-void intel_reset_gt_powersave(struct drm_i915_private *dev_priv);
 void gen6_update_ring_freq(struct drm_i915_private *dev_priv);
 void gen6_rps_busy(struct drm_i915_private *dev_priv);
 void gen6_rps_reset_ei(struct drm_i915_private *dev_priv);
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 576e98744a2d..817c84c22782 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -6508,15 +6508,6 @@ void intel_enable_gt_powersave(struct drm_i915_private *dev_priv)
 	}
 }
 
-void intel_reset_gt_powersave(struct drm_i915_private *dev_priv)
-{
-	if (INTEL_INFO(dev_priv)->gen < 6)
-		return;
-
-	gen6_suspend_rps(dev_priv);
-	dev_priv->rps.enabled = false;
-}
-
 static void ibx_init_clock_gating(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
-- 
2.7.4