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drm/i915: Set softmin frequency on idle->busy transition

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If the GPU load is low enough, it's possible that we'll be stuck at idle
frequency rather than transition into softmin frequency requested by
userspace.

v2: Use intel_set_rps, drop vlv_set_idle
v3: Back to vlv_set_idle, clamp to valid range
v4: Place intel_set_rps at the end

References: https://bugs.freedesktop.org/show_bug.cgi?id=89728
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1466416707-12075-1-git-send-email-michal.winiarski@intel.com
This commit is contained in:
Michał Winiarski 2016-06-20 11:58:27 +02:00 committed by Chris Wilson
parent 0b63bb1412
commit 2b83c4c49a
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/i915/intel_pm.c
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@ -4844,6 +4844,12 @@ void gen6_rps_busy(struct drm_i915_private *dev_priv)
gen6_rps_reset_ei(dev_priv);
I915_WRITE(GEN6_PMINTRMSK,
gen6_rps_pm_mask(dev_priv, dev_priv->rps.cur_freq));
/* Ensure we start at the user's desired frequency */
intel_set_rps(dev_priv,
clamp(dev_priv->rps.cur_freq,
dev_priv->rps.min_freq_softlimit,
dev_priv->rps.max_freq_softlimit));
}
mutex_unlock(&dev_priv->rps.hw_lock);
}