drm/i915: Move overclocking detection to alongside RPS frequency detection

Move the overclocking max frequency detection alongside the regular
frequency detection, before we expose the undefined value to userspace.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1468397438-21226-4-git-send-email-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 54f739f..24b23a5 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5343,7 +5343,7 @@ static void gen8_enable_rps(struct drm_i915_private *dev_priv)
 static void gen6_enable_rps(struct drm_i915_private *dev_priv)
 {
        struct intel_engine_cs *engine;
-       u32 rc6vids, pcu_mbox = 0, rc6_mask = 0;
+       u32 rc6vids, rc6_mask = 0;
        u32 gtfifodbg;
        int rc6_mode;
        int ret;
@@ -5417,14 +5417,6 @@ static void gen6_enable_rps(struct drm_i915_private *dev_priv)
        if (ret)
                DRM_DEBUG_DRIVER("Failed to set the min frequency\n");
 
-       ret = sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, &pcu_mbox);
-       if (!ret && (pcu_mbox & (1<<31))) { /* OC supported */
-               DRM_DEBUG_DRIVER("Overclocking supported. Max: %dMHz, Overclock max: %dMHz\n",
-                                (dev_priv->rps.max_freq_softlimit & 0xff) * 50,
-                                (pcu_mbox & 0xff) * 50);
-               dev_priv->rps.max_freq = pcu_mbox & 0xff;
-       }
-
        reset_rps(dev_priv, gen6_set_rps);
 
        rc6vids = 0;
@@ -6526,6 +6518,20 @@ void intel_init_gt_powersave(struct drm_i915_private *dev_priv)
                              dev_priv->rps.efficient_freq,
                              intel_freq_opcode(dev_priv, 450));
 
+       /* After setting max-softlimit, find the overclock max freq */
+       if (IS_GEN6(dev_priv) ||
+           IS_IVYBRIDGE(dev_priv) || IS_HASWELL(dev_priv)) {
+               u32 params = 0;
+
+               sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, &params);
+               if (params & BIT(31)) { /* OC supported */
+                       DRM_DEBUG_DRIVER("Overclocking supported, max: %dMHz, overclock: %dMHz\n",
+                                        (dev_priv->rps.max_freq & 0xff) * 50,
+                                        (params & 0xff) * 50);
+                       dev_priv->rps.max_freq = params & 0xff;
+               }
+       }
+
        mutex_unlock(&dev_priv->rps.hw_lock);
 }