Select idle frequency during initialisation, then reset the last known
frequency when re-enabling. This allows us to preserve the user selected
frequency across resets.
v2: Stop CHV from overriding the user's choice in cherryview_enable_rps()
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
Cc: Mika Kuoppala <mika.kuopp...@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuopp...@intel.com>
---
drivers/gpu/drm/i915/intel_pm.c | 46 ++++++++++++++++++-----------------------
1 file changed, 20 insertions(+), 26 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 5a8ee0c76593..df72f8e7b4b3 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5149,6 +5149,7 @@ static void gen6_init_rps_frequencies(struct
drm_i915_private *dev_priv)
}
dev_priv->rps.idle_freq = dev_priv->rps.min_freq;
+ dev_priv->rps.cur_freq = dev_priv->rps.idle_freq;
/* Preserve min/max settings in case of re-init */
if (dev_priv->rps.max_freq_softlimit == 0)
@@ -5165,6 +5166,18 @@ static void gen6_init_rps_frequencies(struct
drm_i915_private *dev_priv)
}
}
+static void reset_rps(struct drm_i915_private *dev_priv,
+ void (*set)(struct drm_i915_private *, u8))
+{
+ u8 freq = dev_priv->rps.cur_freq;
+
+ /* force a reset */
+ dev_priv->rps.power = -1;
+ dev_priv->rps.cur_freq = -1;
+
+ set(dev_priv, freq);
+}
+
/* See the Gen9_GT_PM_Programming_Guide doc for the below */
static void gen9_enable_rps(struct drm_i915_private *dev_priv)
{
@@ -5201,8 +5214,7 @@ static void gen9_enable_rps(struct drm_i915_private
*dev_priv)
/* Leaning on the below call to gen6_set_rps to program/setup the
* Up/Down EI & threshold registers, as well as the RP_CONTROL,
* RP_INTERRUPT_LIMITS & RPNSWREQ registers */
- dev_priv->rps.power = HIGH_POWER; /* force a reset */
- gen6_set_rps(dev_priv, dev_priv->rps.idle_freq);
+ reset_rps(dev_priv, gen6_set_rps);
intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
}
@@ -5348,8 +5360,7 @@ static void gen8_enable_rps(struct drm_i915_private
*dev_priv)
/* 6: Ring frequency + overclocking (our driver does this later */
- dev_priv->rps.power = HIGH_POWER; /* force a reset */
- gen6_set_rps(dev_priv, dev_priv->rps.idle_freq);
+ reset_rps(dev_priv, gen6_set_rps);
intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
}
@@ -5442,8 +5453,7 @@ static void gen6_enable_rps(struct drm_i915_private
*dev_priv)
dev_priv->rps.max_freq = pcu_mbox & 0xff;
}
- dev_priv->rps.power = HIGH_POWER; /* force a reset */
- gen6_set_rps(dev_priv, dev_priv->rps.idle_freq);
+ reset_rps(dev_priv, gen6_set_rps);
rc6vids = 0;
ret = sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS,
&rc6vids);
@@ -5807,6 +5817,7 @@ static void valleyview_init_gt_powersave(struct
drm_i915_private *dev_priv)
dev_priv->rps.min_freq);
dev_priv->rps.idle_freq = dev_priv->rps.min_freq;
+ dev_priv->rps.cur_freq = dev_priv->rps.idle_freq;
/* Preserve min/max settings in case of re-init */
if (dev_priv->rps.max_freq_softlimit == 0)
@@ -5871,6 +5882,7 @@ static void cherryview_init_gt_powersave(struct
drm_i915_private *dev_priv)
"Odd GPU freq values\n");
dev_priv->rps.idle_freq = dev_priv->rps.min_freq;
+ dev_priv->rps.cur_freq = dev_priv->rps.idle_freq;
/* Preserve min/max settings in case of re-init */
if (dev_priv->rps.max_freq_softlimit == 0)
@@ -5970,16 +5982,7 @@ static void cherryview_enable_rps(struct
drm_i915_private *dev_priv)
DRM_DEBUG_DRIVER("GPLL enabled? %s\n", yesno(val & GPLLENABLE));
DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
- dev_priv->rps.cur_freq = (val >> 8) & 0xff;
- DRM_DEBUG_DRIVER("current GPU freq: %d MHz (%u)\n",
- intel_gpu_freq(dev_priv, dev_priv->rps.cur_freq),
- dev_priv->rps.cur_freq);
-
- DRM_DEBUG_DRIVER("setting GPU freq to %d MHz (%u)\n",
- intel_gpu_freq(dev_priv, dev_priv->rps.idle_freq),
- dev_priv->rps.idle_freq);
-
- valleyview_set_rps(dev_priv, dev_priv->rps.idle_freq);
+ reset_rps(dev_priv, valleyview_set_rps);
intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
}
@@ -6059,16 +6062,7 @@ static void valleyview_enable_rps(struct
drm_i915_private *dev_priv)
DRM_DEBUG_DRIVER("GPLL enabled? %s\n", yesno(val & GPLLENABLE));
DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
- dev_priv->rps.cur_freq = (val >> 8) & 0xff;
- DRM_DEBUG_DRIVER("current GPU freq: %d MHz (%u)\n",
- intel_gpu_freq(dev_priv, dev_priv->rps.cur_freq),
- dev_priv->rps.cur_freq);
-
- DRM_DEBUG_DRIVER("setting GPU freq to %d MHz (%u)\n",
- intel_gpu_freq(dev_priv, dev_priv->rps.idle_freq),
- dev_priv->rps.idle_freq);
-
- valleyview_set_rps(dev_priv, dev_priv->rps.idle_freq);
+ reset_rps(dev_priv, valleyview_set_rps);
intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
}
--
2.8.1
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