[RFC PATCH 1/5] drm/i915: Always wait for flip_done

[Maarten Lankhorst]

The next commit removes the wait for flip_done in in
drm_atomic_helper_commit_cleanup_done, but we need it for the tests
to pass. Instead of using complicated vblank tracking which ends
up being ignored anyway, call the correct atomic helper. :)

RFC because I'm not completely sure what we want to do with the vblank waiting,
I think for now this patch is the right way to go until we decide because it
preserves the status quo when drm_crtc_commit was introduced.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h      |  3 +-
 drivers/gpu/drm/i915/intel_display.c | 83 +++---------------------------------
 2 files changed, 8 insertions(+), 78 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index cbbafbfb0a55..de19621864a9 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -707,8 +707,7 @@ struct drm_i915_display_funcs {
 			    struct drm_atomic_state *old_state);
 	void (*crtc_disable)(struct intel_crtc_state *old_crtc_state,
 			     struct drm_atomic_state *old_state);
-	void (*update_crtcs)(struct drm_atomic_state *state,
-			     unsigned int *crtc_vblank_mask);
+	void (*update_crtcs)(struct drm_atomic_state *state);
 	void (*audio_codec_enable)(struct drm_connector *connector,
 				   struct intel_encoder *encoder,
 				   const struct drm_display_mode *adjusted_mode);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 52c73b4dabaa..3f3cb96aa11e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12114,73 +12114,10 @@ u32 intel_crtc_get_vblank_counter(struct intel_crtc *crtc)
 	return dev->driver->get_vblank_counter(dev, crtc->pipe);
 }
 
-static void intel_atomic_wait_for_vblanks(struct drm_device *dev,
-					  struct drm_i915_private *dev_priv,
-					  unsigned crtc_mask)
-{
-	unsigned last_vblank_count[I915_MAX_PIPES];
-	enum pipe pipe;
-	int ret;
-
-	if (!crtc_mask)
-		return;
-
-	for_each_pipe(dev_priv, pipe) {
-		struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv,
-								  pipe);
-
-		if (!((1 << pipe) & crtc_mask))
-			continue;
-
-		ret = drm_crtc_vblank_get(&crtc->base);
-		if (WARN_ON(ret != 0)) {
-			crtc_mask &= ~(1 << pipe);
-			continue;
-		}
-
-		last_vblank_count[pipe] = drm_crtc_vblank_count(&crtc->base);
-	}
-
-	for_each_pipe(dev_priv, pipe) {
-		struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv,
-								  pipe);
-		long lret;
-
-		if (!((1 << pipe) & crtc_mask))
-			continue;
-
-		lret = wait_event_timeout(dev->vblank[pipe].queue,
-				last_vblank_count[pipe] !=
-					drm_crtc_vblank_count(&crtc->base),
-				msecs_to_jiffies(50));
-
-		WARN(!lret, "pipe %c vblank wait timed out\n", pipe_name(pipe));
-
-		drm_crtc_vblank_put(&crtc->base);
-	}
-}
-
-static bool needs_vblank_wait(struct intel_crtc_state *crtc_state)
-{
-	/* fb updated, need to unpin old fb */
-	if (crtc_state->fb_changed)
-		return true;
-
-	/* wm changes, need vblank before final wm's */
-	if (crtc_state->update_wm_post)
-		return true;
-
-	if (crtc_state->wm.need_postvbl_update)
-		return true;
-
-	return false;
-}
-
 static void intel_update_crtc(struct drm_crtc *crtc,
 			      struct drm_atomic_state *state,
 			      struct drm_crtc_state *old_crtc_state,
-			      struct drm_crtc_state *new_crtc_state,
-			      unsigned int *crtc_vblank_mask)
+			      struct drm_crtc_state *new_crtc_state)
 {
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
@@ -12203,13 +12140,9 @@ static void intel_update_crtc(struct drm_crtc *crtc,
 	}
 
 	drm_atomic_helper_commit_planes_on_crtc(old_crtc_state);
-
-	if (needs_vblank_wait(pipe_config))
-		*crtc_vblank_mask |= drm_crtc_mask(crtc);
 }
 
-static void intel_update_crtcs(struct drm_atomic_state *state,
-			       unsigned int *crtc_vblank_mask)
+static void intel_update_crtcs(struct drm_atomic_state *state)
 {
 	struct drm_crtc *crtc;
 	struct drm_crtc_state *old_crtc_state, *new_crtc_state;
@@ -12220,12 +12153,11 @@ static void intel_update_crtcs(struct drm_atomic_state *state,
 			continue;
 
 		intel_update_crtc(crtc, state, old_crtc_state,
-				  new_crtc_state, crtc_vblank_mask);
+				  new_crtc_state);
 	}
 }
 
-static void skl_update_crtcs(struct drm_atomic_state *state,
-			     unsigned int *crtc_vblank_mask)
+static void skl_update_crtcs(struct drm_atomic_state *state)
 {
 	struct drm_i915_private *dev_priv = to_i915(state->dev);
 	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
@@ -12284,7 +12216,7 @@ static void skl_update_crtcs(struct drm_atomic_state *state,
 				vbl_wait = true;
 
 			intel_update_crtc(crtc, state, old_crtc_state,
-					  new_crtc_state, crtc_vblank_mask);
+					  new_crtc_state);
 
 			if (vbl_wait)
 				intel_wait_for_vblank(dev_priv, pipe);
@@ -12346,7 +12278,6 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
 	struct intel_crtc_state *intel_cstate;
 	bool hw_check = intel_state->modeset;
 	u64 put_domains[I915_MAX_PIPES] = {};
-	unsigned crtc_vblank_mask = 0;
 	int i;
 
 	intel_atomic_commit_fence_wait(intel_state);
@@ -12438,7 +12369,7 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
 	pm_qos_update_request(&dev_priv->pm_qos_atomic, 0);
 
 	/* Now enable the clocks, plane, pipe, and connectors that we set up. */
-	dev_priv->display.update_crtcs(state, &crtc_vblank_mask);
+	dev_priv->display.update_crtcs(state);
 
 	/* FIXME: We should call drm_atomic_helper_commit_hw_done() here
 	 * already, but still need the state for the delayed optimization. To
@@ -12450,7 +12381,7 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
 	 *   we don't need out special handling any more.
 	 */
 	if (!state->legacy_cursor_update)
-		intel_atomic_wait_for_vblanks(dev, dev_priv, crtc_vblank_mask);
+		drm_atomic_helper_wait_for_flip_done(dev, state);
 
 	/*
 	 * Now that the vblank has passed, we can go ahead and program the
-- 
2.11.0