[Intel-gfx] [PATCH v6 08/23] 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.

v1: Use intel_slpc_active instead of HAS_SLPC (Paulo)

v2-v4: Rebase.

v5: Changed intel_slpc_active to i915.enable_slpc. (Sagar)

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 9c47d65..0225003 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5385,6 +5385,9 @@ int intel_set_rps(struct drm_i915_private *dev_priv, u8 val)
 {
 	int err;
 
+	if (i915.enable_slpc)
+		return 0;
+
 	lockdep_assert_held(&dev_priv->rps.hw_lock);
 	GEM_BUG_ON(val > dev_priv->rps.max_freq);
 	GEM_BUG_ON(val < dev_priv->rps.min_freq);
-- 
1.9.1