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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>
This commit is contained in:
Ville Syrjälä 2015-01-23 21:04:24 +02:00 committed by Daniel Vetter
parent f745a80e34
commit c8c972ebd2
1 changed files with 34 additions and 1 deletions
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35
drivers/gpu/drm/i915/i915_sysfs.c
View File

@ -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);
@ -298,6 +298,36 @@ static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
u32 freq;
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;
}
@ -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,