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authorVille Syrjälä <ville.syrjala@linux.intel.com>2015-01-23 21:04:24 +0200
committerDaniel Vetter <daniel.vetter@ffwll.ch>2015-01-27 09:51:16 +0100
commitc8c972ebd209ee1a0f7715e11bc37cbdb399e05e (patch)
tree07b4770e00802941a296d50bc2c38042f03accae
parentf745a80e34e749e8ef0ba7e694008a4d95447c70 (diff)
drm/i915: Add gt_act_freq_mhz sysfs file
Currently the 'gt_cur_freq_mhz' file shows the actual GPU frequency on VLV/CHV, and the last requested frequency on other platforms. Change the meaning of the file on VLV/CHV to follow the the other platforms, and introduce a new file 'gt_act_freq_mhz' which shows the actual frequency on all platforms. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
-rw-r--r--drivers/gpu/drm/i915/i915_sysfs.c35
1 files changed, 34 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
index 1a1e5aa96d31..532ad3477997 100644
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -281,7 +281,7 @@ static struct bin_attribute dpf_attrs_1 = {
.private = (void *)1
};
-static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
+static ssize_t gt_act_freq_mhz_show(struct device *kdev,
struct device_attribute *attr, char *buf)
{
struct drm_minor *minor = dev_to_drm_minor(kdev);
@@ -299,6 +299,36 @@ static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
freq = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
ret = vlv_gpu_freq(dev_priv, (freq >> 8) & 0xff);
} else {
+ u32 rpstat = I915_READ(GEN6_RPSTAT1);
+ if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+ ret = (rpstat & HSW_CAGF_MASK) >> HSW_CAGF_SHIFT;
+ else
+ ret = (rpstat & GEN6_CAGF_MASK) >> GEN6_CAGF_SHIFT;
+ ret *= GT_FREQUENCY_MULTIPLIER;
+ }
+ mutex_unlock(&dev_priv->rps.hw_lock);
+
+ intel_runtime_pm_put(dev_priv);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", ret);
+}
+
+static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
+ struct device_attribute *attr, char *buf)
+{
+ 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);
+ if (IS_VALLEYVIEW(dev_priv->dev)) {
+ ret = vlv_gpu_freq(dev_priv, dev_priv->rps.cur_freq);
+ } else {
ret = dev_priv->rps.cur_freq * GT_FREQUENCY_MULTIPLIER;
}
mutex_unlock(&dev_priv->rps.hw_lock);
@@ -460,6 +490,7 @@ static ssize_t gt_min_freq_mhz_store(struct device *kdev,
}
+static DEVICE_ATTR(gt_act_freq_mhz, S_IRUGO, gt_act_freq_mhz_show, NULL);
static DEVICE_ATTR(gt_cur_freq_mhz, S_IRUGO, gt_cur_freq_mhz_show, NULL);
static DEVICE_ATTR(gt_max_freq_mhz, S_IRUGO | S_IWUSR, gt_max_freq_mhz_show, gt_max_freq_mhz_store);
static DEVICE_ATTR(gt_min_freq_mhz, S_IRUGO | S_IWUSR, gt_min_freq_mhz_show, gt_min_freq_mhz_store);
@@ -510,6 +541,7 @@ static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr
}
static const struct attribute *gen6_attrs[] = {
+ &dev_attr_gt_act_freq_mhz.attr,
&dev_attr_gt_cur_freq_mhz.attr,
&dev_attr_gt_max_freq_mhz.attr,
&dev_attr_gt_min_freq_mhz.attr,
@@ -520,6 +552,7 @@ static const struct attribute *gen6_attrs[] = {
};
static const struct attribute *vlv_attrs[] = {
+ &dev_attr_gt_act_freq_mhz.attr,
&dev_attr_gt_cur_freq_mhz.attr,
&dev_attr_gt_max_freq_mhz.attr,
&dev_attr_gt_min_freq_mhz.attr,