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drm/i915: Streamline VLV forcewake handling

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It occured to me that when we're trying to wake up both render
and media wells on VLV, we might end up calling the low level
force_wake_get/put two times even though one call would be
enough. Make that happen by figuring out which wells really
need to be woken up based on the forcewake counts.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by:Deepak S <deepak.s@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2014-02-27 22:07:21 +02:00 committed by Daniel Vetter
parent fc9d83f747
commit 6fe7286530
1 changed files with 29 additions and 41 deletions
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70
drivers/gpu/drm/i915/intel_uncore.c
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@ -257,16 +257,16 @@ void vlv_force_wake_get(struct drm_i915_private *dev_priv,
unsigned long irqflags;
spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
if (FORCEWAKE_RENDER & fw_engine) {
if (dev_priv->uncore.fw_rendercount++ == 0)
dev_priv->uncore.funcs.force_wake_get(dev_priv,
FORCEWAKE_RENDER);
}
if (FORCEWAKE_MEDIA & fw_engine) {
if (dev_priv->uncore.fw_mediacount++ == 0)
dev_priv->uncore.funcs.force_wake_get(dev_priv,
FORCEWAKE_MEDIA);
}
if (fw_engine & FORCEWAKE_RENDER &&
dev_priv->uncore.fw_rendercount++ != 0)
fw_engine &= ~FORCEWAKE_RENDER;
if (fw_engine & FORCEWAKE_MEDIA &&
dev_priv->uncore.fw_mediacount++ != 0)
fw_engine &= ~FORCEWAKE_MEDIA;
if (fw_engine)
dev_priv->uncore.funcs.force_wake_get(dev_priv, fw_engine);
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
}
@ -278,19 +278,15 @@ void vlv_force_wake_put(struct drm_i915_private *dev_priv,
spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
if (FORCEWAKE_RENDER & fw_engine) {
WARN_ON(dev_priv->uncore.fw_rendercount == 0);
if (--dev_priv->uncore.fw_rendercount == 0)
dev_priv->uncore.funcs.force_wake_put(dev_priv,
FORCEWAKE_RENDER);
}
if (fw_engine & FORCEWAKE_RENDER &&
--dev_priv->uncore.fw_rendercount != 0)
fw_engine &= ~FORCEWAKE_RENDER;
if (fw_engine & FORCEWAKE_MEDIA &&
--dev_priv->uncore.fw_mediacount != 0)
fw_engine &= ~FORCEWAKE_MEDIA;
if (FORCEWAKE_MEDIA & fw_engine) {
WARN_ON(dev_priv->uncore.fw_mediacount == 0);
if (--dev_priv->uncore.fw_mediacount == 0)
dev_priv->uncore.funcs.force_wake_put(dev_priv,
FORCEWAKE_MEDIA);
}
if (fw_engine)
dev_priv->uncore.funcs.force_wake_put(dev_priv, fw_engine);
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
}
@ -516,27 +512,19 @@ gen6_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
static u##x \
vlv_read##x(struct drm_i915_private *dev_priv, off_t reg, bool trace) { \
unsigned fwengine = 0; \
unsigned fwcount; \
REG_READ_HEADER(x); \
if (FORCEWAKE_VLV_RENDER_RANGE_OFFSET(reg)) { \
fwengine = FORCEWAKE_RENDER; \
fwcount = dev_priv->uncore.fw_rendercount; \
} \
else if (FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(reg)) { \
fwengine = FORCEWAKE_MEDIA; \
fwcount = dev_priv->uncore.fw_mediacount; \
if (FORCEWAKE_VLV_RENDER_RANGE_OFFSET(reg)) { \
if (dev_priv->uncore.fw_rendercount == 0) \
fwengine = FORCEWAKE_RENDER; \
} else if (FORCEWAKE_VLV_MEDIA_RANGE_OFFSET(reg)) { \
if (dev_priv->uncore.fw_mediacount == 0) \
fwengine = FORCEWAKE_MEDIA; \
} \
if (fwengine != 0) { \
if (fwcount == 0) \
(dev_priv)->uncore.funcs.force_wake_get(dev_priv, \
fwengine); \
val = __raw_i915_read##x(dev_priv, reg); \
if (fwcount == 0) \
(dev_priv)->uncore.funcs.force_wake_put(dev_priv, \
fwengine); \
} else { \
val = __raw_i915_read##x(dev_priv, reg); \
} \
if (fwengine) \
dev_priv->uncore.funcs.force_wake_get(dev_priv, fwengine); \
val = __raw_i915_read##x(dev_priv, reg); \
if (fwengine) \
dev_priv->uncore.funcs.force_wake_put(dev_priv, fwengine); \
REG_READ_FOOTER; \
}