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drm/i915: read current freq from Punit on VLV

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Instead of returning the cached value, which is just what the kernel
requested.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jesse Barnes 2013-05-02 10:48:07 -07:00 committed by Daniel Vetter
parent 8f375e10ee
commit 177006a10b
1 changed files with 6 additions and 3 deletions
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9
drivers/gpu/drm/i915/i915_sysfs.c
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@ -212,10 +212,13 @@ static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
int ret;
mutex_lock(&dev_priv->rps.hw_lock);
if (IS_VALLEYVIEW(dev_priv->dev))
ret = vlv_gpu_freq(dev_priv->mem_freq, dev_priv->rps.cur_delay);
else
if (IS_VALLEYVIEW(dev_priv->dev)) {
u32 freq;
valleyview_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS, &freq);
ret = vlv_gpu_freq(dev_priv->mem_freq, (freq >> 8) & 0xff);
} else {
ret = dev_priv->rps.cur_delay * GT_FREQUENCY_MULTIPLIER;
}
mutex_unlock(&dev_priv->rps.hw_lock);
return snprintf(buf, PAGE_SIZE, "%d\n", ret);