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<div class="moz-cite-prefix">On Saturday 28 June 2014 04:33 AM,
<a class="moz-txt-link-abbreviated" href="mailto:ville.syrjala@linux.intel.com">ville.syrjala@linux.intel.com</a> wrote:<br>
</div>
<blockquote
cite="mid:1403910271-24984-2-git-send-email-ville.syrjala@linux.intel.com"
type="cite">
<pre wrap="">From: Ville Syrjälä <a class="moz-txt-link-rfc2396E" href="mailto:ville.syrjala@linux.intel.com"><ville.syrjala@linux.intel.com></a>
mem_freq is needed to decode the GPU freq opcodes.
FIXME: Punit reg seems to contain garbage so this isn't right
Signed-off-by: Ville Syrjälä <a class="moz-txt-link-rfc2396E" href="mailto:ville.syrjala@linux.intel.com"><ville.syrjala@linux.intel.com></a>
---
drivers/gpu/drm/i915/intel_pm.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 07c040c..ef00756 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5629,6 +5629,24 @@ static void valleyview_init_clock_gating(struct drm_device *dev)
static void cherryview_init_clock_gating(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
+ u32 val;
+
+ mutex_lock(&dev_priv->rps.hw_lock);
+ val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
+ mutex_unlock(&dev_priv->rps.hw_lock);
+ switch ((val >> 6) & 3) {
+ case 0:
+ case 1:
+ dev_priv->mem_freq = 800;
+ break;
+ case 2:
+ dev_priv->mem_freq = 1066;
+ break;
+ case 3:
+ dev_priv->mem_freq = 1333;
+ break;
+ }
+ DRM_DEBUG_DRIVER("DDR speed: %d MHz", dev_priv->mem_freq);
I915_WRITE(DSPCLK_GATE_D, VRHUNIT_CLOCK_GATE_DISABLE);
</pre>
</blockquote>
<pre>Added the right way of getting the mem_freq for CHV</pre>
<pre><b><a class="moz-txt-link-freetext" href="http://lists.freedesktop.org/archives/intel-gfx/2014-July/048897.html">http://lists.freedesktop.org/archives/intel-gfx/2014-July/048897.html</a> </b></pre>
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