[Intel-gfx] drm/i915/slpc: If using SLPC, do not set frequency

[Sagar Arun Kamble]

From: Tom O'Rourke <Tom.O'Rourke at intel.com>

When frequency requests are made by SLPC, host driver
should not attempt to make frequency requests due to
potential conflicts.

Host-based turbo operations are already avoided when
SLPC is used.  This change covers other frequency
requests such as from sysfs or debugfs interfaces.

A later patch in this series updates sysfs/debugfs
interfaces for setting max/min frequencies with SLPC.

v2: Use intel_slpc_active instead of HAS_SLPC (Paulo)

Signed-off-by: Tom O'Rourke <Tom.O'Rourke at intel.com>
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble at intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 7156fb5..3b3f487 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4952,6 +4952,9 @@ void gen6_rps_boost(struct drm_i915_private *dev_priv,
 
 void intel_set_rps(struct drm_i915_private *dev_priv, u8 val)
 {
+	if (intel_slpc_active(dev_priv))
+		return;
+
 	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
 		valleyview_set_rps(dev_priv, val);
 	else
-- 
1.9.1