On Mon, Sep 28, 2015 at 10:37:52PM +0300, Imre Deak wrote:
> On Thu, 2015-09-24 at 23:29 +0300, ville.syrj...@linux.intel.com wrote:
> > From: Ville Syrjälä <ville.syrj...@linux.intel.com>
> >
> > We have the czclk freqeuency in dev_priv now, so let's just use it
> ^frequency
> > when converting the rc6 counters to milliseconds. This elimiantes
> ^eliminates
Someone needs to integrate a proper spell checker into checkpatch :)
> > a bunch of hairy code that essentially tries to extract the czclk
> > frequency using yet another method.
> >
> > Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
>
> Reviewed-by: Imre Deak <imre.d...@intel.com>
>
> > ---
> > drivers/gpu/drm/i915/i915_sysfs.c | 31 +++----------------------------
> > 1 file changed, 3 insertions(+), 28 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_sysfs.c
> > b/drivers/gpu/drm/i915/i915_sysfs.c
> > index 55bd04c..74086eb 100644
> > --- a/drivers/gpu/drm/i915/i915_sysfs.c
> > +++ b/drivers/gpu/drm/i915/i915_sysfs.c
> > @@ -39,7 +39,7 @@ static u32 calc_residency(struct drm_device *dev, const
> > u32 reg)
> > {
> > struct drm_i915_private *dev_priv = dev->dev_private;
> > u64 raw_time; /* 32b value may overflow during fixed point math */
> > - u64 units = 128ULL, div = 100000ULL, bias = 100ULL;
> > + u64 units = 128ULL, div = 100000ULL;
> > u32 ret;
> >
> > if (!intel_enable_rc6(dev))
> > @@ -49,41 +49,16 @@ static u32 calc_residency(struct drm_device *dev, const
> > u32 reg)
> >
> > /* On VLV and CHV, residency time is in CZ units rather than 1.28us */
> > if (IS_VALLEYVIEW(dev)) {
> > - u32 clk_reg, czcount_30ns;
> > -
> > - if (IS_CHERRYVIEW(dev))
> > - clk_reg = CHV_CLK_CTL1;
> > - else
> > - clk_reg = VLV_CLK_CTL2;
> > -
> > - czcount_30ns = I915_READ(clk_reg) >>
> > CLK_CTL2_CZCOUNT_30NS_SHIFT;
> > -
> > - if (!czcount_30ns) {
> > - WARN(!czcount_30ns, "bogus CZ count value");
> > - ret = 0;
> > - goto out;
> > - }
> > -
> > - if (IS_CHERRYVIEW(dev) && czcount_30ns == 1) {
> > - /* Special case for 320Mhz */
> > - div = 10000000ULL;
> > - units = 3125ULL;
> > - } else {
> > - czcount_30ns += 1;
> > - div = 1000000ULL;
> > - units = DIV_ROUND_UP_ULL(30ULL * bias, czcount_30ns);
> > - }
> > + units = 1;
> > + div = dev_priv->czclk_freq;
> >
> > if (I915_READ(VLV_COUNTER_CONTROL) & VLV_COUNT_RANGE_HIGH)
> > units <<= 8;
> > -
> > - div = div * bias;
> > }
> >
> > raw_time = I915_READ(reg) * units;
> > ret = DIV_ROUND_UP_ULL(raw_time, div);
> >
> > -out:
> > intel_runtime_pm_put(dev_priv);
> > return ret;
> > }
>
--
Ville Syrjälä
Intel OTC
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