drm/i915: Update ring freq for full gpu freq range

In __gen6_update_ring_freq, use the full range of
possible gpu frequencies from max_freq to min_freq.
The actual gpu frequency could be outside the range
from max_freq_softlimit to min_freq_softlimit due
to power/thermal constraints.

Signed-off-by: Tom O'Rourke <Tom.O'Rourke@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 70e75477f8fce9921e0a9a73462b042f870bd42f..f103ffffc5992d6cbf14043af946a806dec1c20b 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4915,9 +4915,9 @@ static void __gen6_update_ring_freq(struct drm_device *dev)
         * to use for memory access.  We do this by specifying the IA frequency
         * the PCU should use as a reference to determine the ring frequency.
         */
-       for (gpu_freq = dev_priv->rps.max_freq_softlimit; gpu_freq >= dev_priv->rps.min_freq_softlimit;
+       for (gpu_freq = dev_priv->rps.max_freq; gpu_freq >= dev_priv->rps.min_freq;
             gpu_freq--) {
-               int diff = dev_priv->rps.max_freq_softlimit - gpu_freq;
+               int diff = dev_priv->rps.max_freq - gpu_freq;
                unsigned int ia_freq = 0, ring_freq = 0;
 
                if (INTEL_INFO(dev)->gen >= 8) {