drm/i915: Rebalance runtime pm vs forcewake

[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / i915 / intel_uncore.c

diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index e9561de382aa4cba42eab09ee19c4432bf0f33d0..b39ed7968383c0b24eab080089e75e41910a9bad 100644 (file)
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -449,8 +449,6 @@ static void gen6_force_wake_timer(unsigned long arg)
        if (--dev_priv->uncore.forcewake_count == 0)
                dev_priv->uncore.funcs.force_wake_put(dev_priv, FORCEWAKE_ALL);
        spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
-
-       intel_runtime_pm_put(dev_priv);
 }
 
 void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore)
@@ -586,7 +584,6 @@ void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv, int fw_engine)
 void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv, int fw_engine)
 {
        unsigned long irqflags;
-       bool delayed = false;
 
        if (!dev_priv->uncore.funcs.force_wake_put)
                return;
@@ -603,21 +600,19 @@ void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv, int fw_engine)
                goto out;
        }
 
-
        spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
        WARN_ON(!dev_priv->uncore.forcewake_count);
 
        if (--dev_priv->uncore.forcewake_count == 0) {
                dev_priv->uncore.forcewake_count++;
-               delayed = true;
                mod_timer_pinned(&dev_priv->uncore.force_wake_timer,
                                 jiffies + 1);
        }
+
        spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 
 out:
-       if (!delayed)
-               intel_runtime_pm_put(dev_priv);
+       intel_runtime_pm_put(dev_priv);
 }
 
 void assert_force_wake_inactive(struct drm_i915_private *dev_priv)
@@ -774,12 +769,11 @@ gen6_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
            NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
                dev_priv->uncore.funcs.force_wake_get(dev_priv, \
                                                      FORCEWAKE_ALL); \
-               val = __raw_i915_read##x(dev_priv, reg); \
-               dev_priv->uncore.funcs.force_wake_put(dev_priv, \
-                                                     FORCEWAKE_ALL); \
-       } else { \
-               val = __raw_i915_read##x(dev_priv, reg); \
+               dev_priv->uncore.forcewake_count++; \
+               mod_timer_pinned(&dev_priv->uncore.force_wake_timer, \
+                                jiffies + 1); \
        } \
+       val = __raw_i915_read##x(dev_priv, reg); \
        hsw_unclaimed_reg_debug(dev_priv, reg, true, false); \
        REG_READ_FOOTER; \
 }