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drm/i915: Restarting the Idleness DRRS in drrs_flush 

Corrected the documentation on the intel_edp_drrs_flush and
intel_edp_drrs_invalidate.

And accordingly edp_drrs_flush function is modified to restart the idleness
detection after upclocking.

v2: Update kerneldoc

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> (v1)
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ramalingam C 2015-06-15 20:50:05 +05:30 committed by Daniel Vetter
parent a80c69fc08
commit 0ddfd20385
1 changed files with 20 additions and 10 deletions
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30
drivers/gpu/drm/i915/intel_dp.c
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@ -5456,13 +5456,12 @@ static void intel_edp_drrs_downclock_work(struct work_struct *work)
}
/**
* intel_edp_drrs_invalidate - Invalidate DRRS
* intel_edp_drrs_invalidate - Disable Idleness DRRS
* @dev: DRM device
* @frontbuffer_bits: frontbuffer plane tracking bits
*
* When there is a disturbance on screen (due to cursor movement/time
* update etc), DRRS needs to be invalidated, i.e. need to switch to
* high RR.
* This function gets called everytime rendering on the given planes start.
* Hence DRRS needs to be Upclocked, i.e. (LOW_RR -> HIGH_RR).
*
* Dirty frontbuffers relevant to DRRS are tracked in busy_frontbuffer_bits.
*/
@ -5487,6 +5486,7 @@ void intel_edp_drrs_invalidate(struct drm_device *dev,
crtc = dp_to_dig_port(dev_priv->drrs.dp)->base.base.crtc;
pipe = to_intel_crtc(crtc)->pipe;
/* invalidate means busy screen hence upclock */
if (dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR) {
intel_dp_set_drrs_state(dev_priv->dev,
dev_priv->drrs.dp->attached_connector->panel.
@ -5500,13 +5500,14 @@ void intel_edp_drrs_invalidate(struct drm_device *dev,
}
/**
* intel_edp_drrs_flush - Flush DRRS
* intel_edp_drrs_flush - Restart Idleness DRRS
* @dev: DRM device
* @frontbuffer_bits: frontbuffer plane tracking bits
*
* When there is no movement on screen, DRRS work can be scheduled.
* This DRRS work is responsible for setting relevant registers after a
* timeout of 1 second.
* This function gets called every time rendering on the given planes has
* completed or flip on a crtc is completed. So DRRS should be upclocked
* (LOW_RR -> HIGH_RR). And also Idleness detection should be started again,
* if no other planes are dirty.
*
* Dirty frontbuffers relevant to DRRS are tracked in busy_frontbuffer_bits.
*/
@ -5532,8 +5533,17 @@ void intel_edp_drrs_flush(struct drm_device *dev,
pipe = to_intel_crtc(crtc)->pipe;
dev_priv->drrs.busy_frontbuffer_bits &= ~frontbuffer_bits;
if (dev_priv->drrs.refresh_rate_type != DRRS_LOW_RR &&
!dev_priv->drrs.busy_frontbuffer_bits)
/* flush means busy screen hence upclock */
if (dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
intel_dp_set_drrs_state(dev_priv->dev,
dev_priv->drrs.dp->attached_connector->panel.
fixed_mode->vrefresh);
/*
* flush also means no more activity hence schedule downclock, if all
* other fbs are quiescent too
*/
if (!dev_priv->drrs.busy_frontbuffer_bits)
schedule_delayed_work(&dev_priv->drrs.work,
msecs_to_jiffies(1000));
mutex_unlock(&dev_priv->drrs.mutex);