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drm/i915: Lift sideband locking for vlv_punit_(read|write)

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Lift the sideband acquisition for vlv_punit_read and vlv_punit_write
into their callers, so that we can lock the sideband once for a sequence
of operations, rather than perform the heavyweight acquisition on each
request.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190426081725.31217-3-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2019-04-26 09:17:20 +01:00
parent 221c78623e
commit 337fa6e04d
7 changed files with 89 additions and 43 deletions
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14
drivers/gpu/drm/i915/i915_sysfs.c
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@@ -259,25 +259,25 @@ static ssize_t gt_act_freq_mhz_show(struct device *kdev,
{
struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev);
intel_wakeref_t wakeref;
int ret;
u32 freq;
wakeref = intel_runtime_pm_get(dev_priv);
mutex_lock(&dev_priv->pcu_lock);
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
u32 freq;
vlv_punit_get(dev_priv);
freq = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
ret = intel_gpu_freq(dev_priv, (freq >> 8) & 0xff);
vlv_punit_put(dev_priv);
freq = (freq >> 8) & 0xff;
} else {
ret = intel_gpu_freq(dev_priv,
intel_get_cagf(dev_priv,
I915_READ(GEN6_RPSTAT1)));
freq = intel_get_cagf(dev_priv, I915_READ(GEN6_RPSTAT1));
}
mutex_unlock(&dev_priv->pcu_lock);
intel_runtime_pm_put(dev_priv, wakeref);
return snprintf(buf, PAGE_SIZE, "%d\n", ret);
return snprintf(buf, PAGE_SIZE, "%d\n", intel_gpu_freq(dev_priv, freq));
}
static ssize_t gt_cur_freq_mhz_show(struct device *kdev,