[Intel-gfx] drm/i915/slpc: Update freq min/max softlimits

[Sagar Arun Kamble]

v2: Removing checks for vma obj and kmap_atomic validity. (Chris)

Signed-off-by: Sagar Arun Kamble <sagar.a.kam...@intel.com>
---
 drivers/gpu/drm/i915/intel_slpc.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_slpc.c 
b/drivers/gpu/drm/i915/intel_slpc.c
index 5ab8362..7062d8b 100644
--- a/drivers/gpu/drm/i915/intel_slpc.c
+++ b/drivers/gpu/drm/i915/intel_slpc.c
@@ -293,6 +293,10 @@ void intel_slpc_disable(struct drm_i915_private *dev_priv)
 
 void intel_slpc_enable(struct drm_i915_private *dev_priv)
 {
+       struct drm_i915_gem_object *obj;
+       struct page *page;
+       void *pv = NULL;
+       struct slpc_shared_data data;
        u64 val;
 
        host2guc_slpc_reset(dev_priv);
@@ -336,6 +340,25 @@ void intel_slpc_enable(struct drm_i915_private *dev_priv)
        intel_slpc_set_param(dev_priv,
                             
SLPC_PARAM_GLOBAL_ENABLE_BALANCER_IN_NON_GAMING_MODE,
                             0);
+
+       obj = dev_priv->guc.slpc.vma->obj;
+       intel_slpc_query_task_state(dev_priv);
+
+       pv = kmap_atomic(i915_gem_object_get_page(obj, 0));
+       data = *(struct slpc_shared_data *) pv;
+       kunmap_atomic(pv);
+
+       /*
+        * TODO: Define separate variables for slice and unslice
+        *       frequencies for driver state variable.
+        */
+       dev_priv->rps.max_freq_softlimit =
+                       data.task_state_data.freq_unslice_max;
+       dev_priv->rps.min_freq_softlimit =
+                       data.task_state_data.freq_unslice_min;
+
+       dev_priv->rps.max_freq_softlimit *= GEN9_FREQ_SCALER;
+       dev_priv->rps.min_freq_softlimit *= GEN9_FREQ_SCALER;
 }
 
 void intel_slpc_reset(struct drm_i915_private *dev_priv)
-- 
1.9.1

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