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drm/i915/psr: Restrict buffer tracking to the PSR pipe 

The current code tracks business across all pipes, but we're only
really interested in the one pipe DRRS is enabled on. Fairly tiny
optimization, but something I noticed while reading the code. But it
might matter a bit when e.g. showing a video or something only on the
external screen, while the panel is kept static.

Also regroup the code slightly: First compute new bitmasks, then take
appropriate actions.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Durgadoss R <durgadoss.r@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
This commit is contained in:
Daniel Vetter 2015-06-18 10:30:26 +02:00
parent c1d038c6e2
commit ec76d62999
1 changed files with 7 additions and 4 deletions
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11
drivers/gpu/drm/i915/intel_psr.c
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@ -663,11 +663,12 @@ void intel_psr_invalidate(struct drm_device *dev,
crtc = dp_to_dig_port(dev_priv->psr.enabled)->base.base.crtc;
pipe = to_intel_crtc(crtc)->pipe;
intel_psr_exit(dev);
frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe);
dev_priv->psr.busy_frontbuffer_bits |= frontbuffer_bits;
if (frontbuffer_bits)
intel_psr_exit(dev);
mutex_unlock(&dev_priv->psr.lock);
}
@ -698,6 +699,8 @@ void intel_psr_flush(struct drm_device *dev,
crtc = dp_to_dig_port(dev_priv->psr.enabled)->base.base.crtc;
pipe = to_intel_crtc(crtc)->pipe;
frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe);
dev_priv->psr.busy_frontbuffer_bits &= ~frontbuffer_bits;
/*
@ -716,7 +719,7 @@ void intel_psr_flush(struct drm_device *dev,
* invalidating. Which means we need to manually fake this in
* software for all flushes, not just when we've seen a preceding
* invalidation through frontbuffer rendering. */
if (!HAS_DDI(dev))
if (frontbuffer_bits && !HAS_DDI(dev))
intel_psr_exit(dev);
if (!dev_priv->psr.active && !dev_priv->psr.busy_frontbuffer_bits)