[PATCH 4/7] drm/i915: DRRS calls based on frontbuffer

Vandana Kannan
2014-12-18T15:15:35Z

Calls have been added to invalidate/flush DRRS whenever invalidate/flush is
called as part of frontbuffer tracking.
Apart from calls as a result of GEM tracking to fb invalidate/flush, a
call has been added to invalidate fb obj from crtc_page_flip as well. This
is to track busyness through flip calls.
The call to fb_obj_invalidate (in flip) is placed before queuing flip for this
obj.

drrs_invalidate() and drrs_flush() check for drrs.dp which would be NULL if
it was setup in drrs_enable(). This covers for the condition when DRRS is
not supported.

Signed-off-by: Vandana Kannan <vandana.kannan@intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 8 +++--
drivers/gpu/drm/i915/intel_dp.c | 51 ++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_drv.h | 3 ++
drivers/gpu/drm/i915/intel_frontbuffer.c | 2 ++
4 files changed, 61 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3044af5..448f551 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9717,6 +9717,11 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
if (ret)
goto cleanup_pending;

+ i915_gem_track_fb(work->old_fb_obj, obj,
+ INTEL_FRONTBUFFER_PRIMARY(pipe));
+
+ intel_fb_obj_invalidate(obj, ring);
+
work->gtt_offset =
i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset;

@@ -9741,9 +9746,6 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
work->flip_queued_vblank = drm_vblank_count(dev, intel_crtc->pipe);
work->enable_stall_check = true;

- i915_gem_track_fb(work->old_fb_obj, obj,
- INTEL_FRONTBUFFER_PRIMARY(pipe));
-
intel_fbc_disable(dev);
intel_frontbuffer_flip_prepare(dev, INTEL_FRONTBUFFER_PRIMARY(pipe));
mutex_unlock(&dev->struct_mutex);
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 7098470..bc17900 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -4902,6 +4902,57 @@ unlock:
mutex_unlock(&dev_priv->drrs.mutex);
}

+void intel_edp_drrs_invalidate(struct drm_device *dev,
+ unsigned frontbuffer_bits)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct drm_crtc *crtc;
+ enum pipe pipe;
+
+ if (!dev_priv->drrs.dp)
+ return;
+
+ mutex_lock(&dev_priv->drrs.mutex);
+ crtc = dp_to_dig_port(dev_priv->drrs.dp)->base.base.crtc;
+ pipe = to_intel_crtc(crtc)->pipe;
+
+ if (dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR) {
+ cancel_delayed_work_sync(&dev_priv->drrs.work);
+ intel_dp_set_drrs_state(dev_priv->dev,
+ dev_priv->drrs.dp->attached_connector->panel.
+ fixed_mode->vrefresh);
+ }
+
+ frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe);
+
+ dev_priv->drrs.busy_frontbuffer_bits |= frontbuffer_bits;
+ mutex_unlock(&dev_priv->drrs.mutex);
+}
+
+void intel_edp_drrs_flush(struct drm_device *dev,
+ unsigned frontbuffer_bits)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct drm_crtc *crtc;
+ enum pipe pipe;
+
+ if (!dev_priv->drrs.dp)
+ return;
+
+ mutex_lock(&dev_priv->drrs.mutex);
+ crtc = dp_to_dig_port(dev_priv->drrs.dp)->base.base.crtc;
+ pipe = to_intel_crtc(crtc)->pipe;
+ dev_priv->drrs.busy_frontbuffer_bits &= ~frontbuffer_bits;
+
+ cancel_delayed_work_sync(&dev_priv->drrs.work);
+
+ if (dev_priv->drrs.refresh_rate_type != DRRS_LOW_RR &&
+ !dev_priv->drrs.busy_frontbuffer_bits)
+ schedule_delayed_work(&dev_priv->drrs.work,
+ msecs_to_jiffies(1000));
+ mutex_unlock(&dev_priv->drrs.mutex);
+}
+
static struct drm_display_mode *
intel_dp_drrs_init(struct intel_connector *intel_connector,
struct drm_display_mode *fixed_mode)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index ae02413..7d52fed 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1004,6 +1004,9 @@ int intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
int intel_disable_plane(struct drm_plane *plane);
void intel_edp_drrs_enable(struct intel_dp *intel_dp);
void intel_edp_drrs_disable(struct intel_dp *intel_dp);
+void intel_edp_drrs_invalidate(struct drm_device *dev,
+ unsigned frontbuffer_bits);
+void intel_edp_drrs_flush(struct drm_device *dev, unsigned frontbuffer_bits);

/* intel_dp_mst.c */
int intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_id);
diff --git a/drivers/gpu/drm/i915/intel_frontbuffer.c b/drivers/gpu/drm/i915/intel_frontbuffer.c
index 79f6d72..73cb6e0 100644
--- a/drivers/gpu/drm/i915/intel_frontbuffer.c
+++ b/drivers/gpu/drm/i915/intel_frontbuffer.c
@@ -157,6 +157,7 @@ void intel_fb_obj_invalidate(struct drm_i915_gem_object *obj,
intel_mark_fb_busy(dev, obj->frontbuffer_bits, ring);

intel_psr_invalidate(dev, obj->frontbuffer_bits);
+ intel_edp_drrs_invalidate(dev, obj->frontbuffer_bits);
}

/**
@@ -182,6 +183,7 @@ void intel_frontbuffer_flush(struct drm_device *dev,

intel_mark_fb_busy(dev, frontbuffer_bits, NULL);

+ intel_edp_drrs_flush(dev, frontbuffer_bits);
intel_psr_flush(dev, frontbuffer_bits);

/*