[Intel-gfx] [PATCH 2/3] drm/i915: Remove superfluous powersave work flushing

[Chris Wilson]

Instead of flushing the outstanding enabling, remember the requested
frequency to apply when the powersave work runs.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 30 ++------------------------
 drivers/gpu/drm/i915/i915_sysfs.c   | 42 +++++++------------------------------
 2 files changed, 10 insertions(+), 62 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index f664884ad27f..2858415a7d0e 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1193,8 +1193,6 @@ static int i915_frequency_info(struct seq_file *m, void *unused)
 
 	intel_runtime_pm_get(dev_priv);
 
-	flush_delayed_work(&dev_priv->rps.delayed_resume_work);
-
 	if (IS_GEN5(dev)) {
 		u16 rgvswctl = I915_READ16(MEMSWCTL);
 		u16 rgvstat = I915_READ16(MEMSTAT_ILK);
@@ -1882,8 +1880,6 @@ static int i915_ring_freq_table(struct seq_file *m, void *unused)
 
 	intel_runtime_pm_get(dev_priv);
 
-	flush_delayed_work(&dev_priv->rps.delayed_resume_work);
-
 	ret = mutex_lock_interruptible(&dev_priv->rps.hw_lock);
 	if (ret)
 		goto out;
@@ -4976,20 +4972,11 @@ i915_max_freq_get(void *data, u64 *val)
 {
 	struct drm_device *dev = data;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	int ret;
 
 	if (INTEL_INFO(dev)->gen < 6)
 		return -ENODEV;
 
-	flush_delayed_work(&dev_priv->rps.delayed_resume_work);
-
-	ret = mutex_lock_interruptible(&dev_priv->rps.hw_lock);
-	if (ret)
-		return ret;
-
 	*val = intel_gpu_freq(dev_priv, dev_priv->rps.max_freq_softlimit);
-	mutex_unlock(&dev_priv->rps.hw_lock);
-
 	return 0;
 }
 
@@ -5004,8 +4991,6 @@ i915_max_freq_set(void *data, u64 val)
 	if (INTEL_INFO(dev)->gen < 6)
 		return -ENODEV;
 
-	flush_delayed_work(&dev_priv->rps.delayed_resume_work);
-
 	DRM_DEBUG_DRIVER("Manually setting max freq to %llu\n", val);
 
 	ret = mutex_lock_interruptible(&dev_priv->rps.hw_lock);
@@ -5043,20 +5028,11 @@ i915_min_freq_get(void *data, u64 *val)
 {
 	struct drm_device *dev = data;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	int ret;
 
-	if (INTEL_INFO(dev)->gen < 6)
+	if (INTEL_GEN(dev_priv) < 6)
 		return -ENODEV;
 
-	flush_delayed_work(&dev_priv->rps.delayed_resume_work);
-
-	ret = mutex_lock_interruptible(&dev_priv->rps.hw_lock);
-	if (ret)
-		return ret;
-
 	*val = intel_gpu_freq(dev_priv, dev_priv->rps.min_freq_softlimit);
-	mutex_unlock(&dev_priv->rps.hw_lock);
-
 	return 0;
 }
 
@@ -5068,11 +5044,9 @@ i915_min_freq_set(void *data, u64 val)
 	u32 hw_max, hw_min;
 	int ret;
 
-	if (INTEL_INFO(dev)->gen < 6)
+	if (INTEL_GEN(dev_priv) < 6)
 		return -ENODEV;
 
-	flush_delayed_work(&dev_priv->rps.delayed_resume_work);
-
 	DRM_DEBUG_DRIVER("Manually setting min freq to %llu\n", val);
 
 	ret = mutex_lock_interruptible(&dev_priv->rps.hw_lock);
diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
index a6e90fe05a1e..915e97cdc4d5 100644
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -271,8 +271,6 @@ static ssize_t gt_act_freq_mhz_show(struct device *kdev,
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	int ret;
 
-	flush_delayed_work(&dev_priv->rps.delayed_resume_work);
-
 	intel_runtime_pm_get(dev_priv);
 
 	mutex_lock(&dev_priv->rps.hw_lock);
@@ -303,19 +301,9 @@ static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
 	struct drm_minor *minor = dev_to_drm_minor(kdev);
 	struct drm_device *dev = minor->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	int ret;
 
-	flush_delayed_work(&dev_priv->rps.delayed_resume_work);
-
-	intel_runtime_pm_get(dev_priv);
-
-	mutex_lock(&dev_priv->rps.hw_lock);
-	ret = intel_gpu_freq(dev_priv, dev_priv->rps.cur_freq);
-	mutex_unlock(&dev_priv->rps.hw_lock);
-
-	intel_runtime_pm_put(dev_priv);
-
-	return snprintf(buf, PAGE_SIZE, "%d\n", ret);
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			intel_gpu_freq(dev_priv, dev_priv->rps.cur_freq));
 }
 
 static ssize_t vlv_rpe_freq_mhz_show(struct device *kdev,
@@ -335,15 +323,10 @@ static ssize_t gt_max_freq_mhz_show(struct device *kdev, struct device_attribute
 	struct drm_minor *minor = dev_to_drm_minor(kdev);
 	struct drm_device *dev = minor->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	int ret;
-
-	flush_delayed_work(&dev_priv->rps.delayed_resume_work);
 
-	mutex_lock(&dev_priv->rps.hw_lock);
-	ret = intel_gpu_freq(dev_priv, dev_priv->rps.max_freq_softlimit);
-	mutex_unlock(&dev_priv->rps.hw_lock);
-
-	return snprintf(buf, PAGE_SIZE, "%d\n", ret);
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			intel_gpu_freq(dev_priv,
+				       dev_priv->rps.max_freq_softlimit));
 }
 
 static ssize_t gt_max_freq_mhz_store(struct device *kdev,
@@ -360,8 +343,6 @@ static ssize_t gt_max_freq_mhz_store(struct device *kdev,
 	if (ret)
 		return ret;
 
-	flush_delayed_work(&dev_priv->rps.delayed_resume_work);
-
 	intel_runtime_pm_get(dev_priv);
 
 	mutex_lock(&dev_priv->rps.hw_lock);
@@ -403,15 +384,10 @@ static ssize_t gt_min_freq_mhz_show(struct device *kdev, struct device_attribute
 	struct drm_minor *minor = dev_to_drm_minor(kdev);
 	struct drm_device *dev = minor->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	int ret;
 
-	flush_delayed_work(&dev_priv->rps.delayed_resume_work);
-
-	mutex_lock(&dev_priv->rps.hw_lock);
-	ret = intel_gpu_freq(dev_priv, dev_priv->rps.min_freq_softlimit);
-	mutex_unlock(&dev_priv->rps.hw_lock);
-
-	return snprintf(buf, PAGE_SIZE, "%d\n", ret);
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			intel_gpu_freq(dev_priv,
+				       dev_priv->rps.min_freq_softlimit));
 }
 
 static ssize_t gt_min_freq_mhz_store(struct device *kdev,
@@ -428,8 +404,6 @@ static ssize_t gt_min_freq_mhz_store(struct device *kdev,
 	if (ret)
 		return ret;
 
-	flush_delayed_work(&dev_priv->rps.delayed_resume_work);
-
 	intel_runtime_pm_get(dev_priv);
 
 	mutex_lock(&dev_priv->rps.hw_lock);
-- 
2.8.1