diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2015-09-28 20:43:43 (GMT) |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-09-30 08:20:38 (GMT) |
| commit | 2cc9fab180e8add4159ed1fc874131f984d0bcb1 (patch) | |
| tree | 1fc8fbf875a77fa7532627fa6f2639979fa99c43 /drivers/gpu/drm | |
| parent | bfa7df01a092e92ae764d39fee07fc3f486ed6a9 (diff) | |
| download | linux-2cc9fab180e8add4159ed1fc874131f984d0bcb1.tar.xz | |
drm/i915: Simplify vlv/chv rc6 residency calculation
We have the czclk frequency in dev_priv now, so let's just use it
when converting the rc6 counters to milliseconds. This eliminates
a bunch of hairy code that essentially tries to extract the czclk
frequency using yet another method.
v2: Fix typos in commit message (Imre)
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_sysfs.c | 31 |
1 files 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; } |