From: Ville Syrjälä <ville.syrj...@linux.intel.com>
Keep the HPLL frequencey in dev_priv on VLV instead of reading
it from CCK every time it's needed.
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 2 +-
drivers/gpu/drm/i915/intel_display.c | 7 ++++++-
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 4bae871..dd40925 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1360,7 +1360,7 @@ typedef struct drm_i915_private {
int fence_reg_start; /* 4 if userland hasn't ioctl'd us yet */
int num_fence_regs; /* 8 on pre-965, 16 otherwise */
- unsigned int fsb_freq, mem_freq, is_ddr3;
+ unsigned int fsb_freq, mem_freq, is_ddr3, hpll_vco;
/**
* wq - Driver workqueue for GEM.
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 48f4990..f97e895 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3898,13 +3898,18 @@ int valleyview_get_vco(struct drm_i915_private
*dev_priv)
{
int hpll_freq, vco_freq[] = { 800, 1600, 2000, 2400 };
+ if (dev_priv->hpll_vco)
+ return dev_priv->hpll_vco;
+
/* Obtain SKU information */
mutex_lock(&dev_priv->dpio_lock);
hpll_freq = vlv_cck_read(dev_priv, CCK_FUSE_REG) &
CCK_FUSE_HPLL_FREQ_MASK;
mutex_unlock(&dev_priv->dpio_lock);
- return vco_freq[hpll_freq];
+ dev_priv->hpll_vco = vco_freq[hpll_freq];
+
+ return dev_priv->hpll_vco;
}
/* Adjust CDclk dividers to allow high res or save power if possible */
--
1.8.1.5
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