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.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_pm.c | 34 +++++++++++++++++-----------------
1 file changed, 17 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 658a75659657..98f0afa08332 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5092,6 +5092,7 @@ 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)
@@ -5108,6 +5109,15 @@ 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)
{
@@ -5144,8 +5154,7 @@ 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);
}
@@ -5291,8 +5300,7 @@ 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);
}
@@ -5385,8 +5393,7 @@ 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);
@@ -5750,6 +5757,7 @@ 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)
@@ -5814,6 +5822,7 @@ 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)
@@ -5922,7 +5931,7 @@ static void cherryview_enable_rps(struct drm_i915_private *dev_priv)
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);
}
@@ -6002,16 +6011,7 @@ 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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