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drm/i915: Cache current cdclk frequency in dev_priv

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Rather that extracting the current cdclk freuqncy every time someone
wants to know it, cache the current value and use that. VLV/CHV already
stored a cached value there so just expand that to cover all platforms.

v2: Rebased to the latest
v3: Rebased to the latest
v4: Rebased to the latest
v5: Removed spurious call to 'intel_update_cdclk(dev)' based on
    Damien Lespiau's comment

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Ville Syrjälä 2015-06-03 15:45:07 +03:00 committed by Jani Nikula
parent ccb6662b7e
commit b6283055b4
1 changed files with 15 additions and 9 deletions
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22
drivers/gpu/drm/i915/intel_display.c
View File

@ -5747,7 +5747,7 @@ static int valleyview_get_vco(struct drm_i915_private *dev_priv)
return vco_freq[hpll_freq] * 1000;
}
static void vlv_update_cdclk(struct drm_device *dev)
static void intel_update_cdclk(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@ -5755,12 +5755,19 @@ static void vlv_update_cdclk(struct drm_device *dev)
DRM_DEBUG_DRIVER("Current CD clock rate: %d kHz\n",
dev_priv->cdclk_freq);
/*
* Program the gmbus_freq based on the cdclk frequency.
* BSpec erroneously claims we should aim for 4MHz, but
* in fact 1MHz is the correct frequency.
*/
if (IS_VALLEYVIEW(dev)) {
/*
* Program the gmbus_freq based on the cdclk frequency.
* BSpec erroneously claims we should aim for 4MHz, but
* in fact 1MHz is the correct frequency.
*/
I915_WRITE(GMBUSFREQ_VLV, DIV_ROUND_UP(dev_priv->cdclk_freq, 1000));
}
}
/* Adjust CDclk dividers to allow high res or save power if possible */
@ -5826,7 +5833,7 @@ static void valleyview_set_cdclk(struct drm_device *dev, int cdclk)
mutex_unlock(&dev_priv->sb_lock);
vlv_update_cdclk(dev);
intel_update_cdclk(dev);
}
static void cherryview_set_cdclk(struct drm_device *dev, int cdclk)
@ -5867,7 +5874,7 @@ static void cherryview_set_cdclk(struct drm_device *dev, int cdclk)
}
mutex_unlock(&dev_priv->rps.hw_lock);
vlv_update_cdclk(dev);
intel_update_cdclk(dev);
}
static int valleyview_calc_cdclk(struct drm_i915_private *dev_priv,
@ -9479,6 +9486,7 @@ static void hsw_restore_lcpll(struct drm_i915_private *dev_priv)
}
intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
intel_update_cdclk(dev_priv->dev);
}
/*
@ -13273,6 +13281,8 @@ static void intel_shared_dpll_init(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
intel_update_cdclk(dev);
if (HAS_DDI(dev))
intel_ddi_pll_init(dev);
else if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
@ -14848,13 +14858,9 @@ static void i915_disable_vga(struct drm_device *dev)
void intel_modeset_init_hw(struct drm_device *dev)
{
intel_update_cdclk(dev);
intel_prepare_ddi(dev);
if (IS_VALLEYVIEW(dev))
vlv_update_cdclk(dev);
intel_init_clock_gating(dev);
intel_enable_gt_powersave(dev);
}