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>
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@ -281,7 +281,7 @@ static struct bin_attribute dpf_attrs_1 = {
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.private = (void *)1
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};
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static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
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static ssize_t gt_act_freq_mhz_show(struct device *kdev,
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struct device_attribute *attr, char *buf)
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{
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struct drm_minor *minor = dev_to_drm_minor(kdev);
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@ -298,6 +298,36 @@ static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
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u32 freq;
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freq = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
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ret = vlv_gpu_freq(dev_priv, (freq >> 8) & 0xff);
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} else {
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u32 rpstat = I915_READ(GEN6_RPSTAT1);
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if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
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ret = (rpstat & HSW_CAGF_MASK) >> HSW_CAGF_SHIFT;
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else
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ret = (rpstat & GEN6_CAGF_MASK) >> GEN6_CAGF_SHIFT;
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ret *= GT_FREQUENCY_MULTIPLIER;
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}
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mutex_unlock(&dev_priv->rps.hw_lock);
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intel_runtime_pm_put(dev_priv);
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return snprintf(buf, PAGE_SIZE, "%d\n", ret);
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}
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static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
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struct device_attribute *attr, char *buf)
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{
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struct drm_minor *minor = dev_to_drm_minor(kdev);
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struct drm_device *dev = minor->dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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int ret;
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flush_delayed_work(&dev_priv->rps.delayed_resume_work);
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intel_runtime_pm_get(dev_priv);
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mutex_lock(&dev_priv->rps.hw_lock);
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if (IS_VALLEYVIEW(dev_priv->dev)) {
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ret = vlv_gpu_freq(dev_priv, dev_priv->rps.cur_freq);
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} else {
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ret = dev_priv->rps.cur_freq * GT_FREQUENCY_MULTIPLIER;
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}
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@ -460,6 +490,7 @@ static ssize_t gt_min_freq_mhz_store(struct device *kdev,
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}
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static DEVICE_ATTR(gt_act_freq_mhz, S_IRUGO, gt_act_freq_mhz_show, NULL);
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static DEVICE_ATTR(gt_cur_freq_mhz, S_IRUGO, gt_cur_freq_mhz_show, NULL);
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static DEVICE_ATTR(gt_max_freq_mhz, S_IRUGO | S_IWUSR, gt_max_freq_mhz_show, gt_max_freq_mhz_store);
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static DEVICE_ATTR(gt_min_freq_mhz, S_IRUGO | S_IWUSR, gt_min_freq_mhz_show, gt_min_freq_mhz_store);
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@ -510,6 +541,7 @@ static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr
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}
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static const struct attribute *gen6_attrs[] = {
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&dev_attr_gt_act_freq_mhz.attr,
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&dev_attr_gt_cur_freq_mhz.attr,
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&dev_attr_gt_max_freq_mhz.attr,
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&dev_attr_gt_min_freq_mhz.attr,
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@ -520,6 +552,7 @@ static const struct attribute *gen6_attrs[] = {
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};
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static const struct attribute *vlv_attrs[] = {
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&dev_attr_gt_act_freq_mhz.attr,
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&dev_attr_gt_cur_freq_mhz.attr,
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&dev_attr_gt_max_freq_mhz.attr,
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&dev_attr_gt_min_freq_mhz.attr,
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