These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

1 files changed, 42 insertions, 14 deletions

diff --git a/kernel/drivers/gpu/drm/msm/msm_atomic.c b/kernel/drivers/gpu/drm/msm/msm_atomic.c
index 5b192128c..7eb253bc2 100644
--- a/kernel/drivers/gpu/drm/msm/msm_atomic.c
+++ b/kernel/drivers/gpu/drm/msm/msm_atomic.c
@@ -84,6 +84,33 @@ static void commit_destroy(struct msm_commit *c)
 	kfree(c);
 }
 
+static void msm_atomic_wait_for_commit_done(struct drm_device *dev,
+		struct drm_atomic_state *old_state)
+{
+	struct drm_crtc *crtc;
+	struct msm_drm_private *priv = old_state->dev->dev_private;
+	struct msm_kms *kms = priv->kms;
+	int ncrtcs = old_state->dev->mode_config.num_crtc;
+	int i;
+
+	for (i = 0; i < ncrtcs; i++) {
+		crtc = old_state->crtcs[i];
+
+		if (!crtc)
+			continue;
+
+		if (!crtc->state->enable)
+			continue;
+
+		/* Legacy cursor ioctls are completely unsynced, and userspace
+		 * relies on that (by doing tons of cursor updates). */
+		if (old_state->legacy_cursor_update)
+			continue;
+
+		kms->funcs->wait_for_crtc_commit_done(kms, crtc);
+	}
+}
+
 /* The (potentially) asynchronous part of the commit.  At this point
  * nothing can fail short of armageddon.
  */
@@ -98,7 +125,7 @@ static void complete_commit(struct msm_commit *c)
 
 	drm_atomic_helper_commit_modeset_disables(dev, state);
 
-	drm_atomic_helper_commit_planes(dev, state);
+	drm_atomic_helper_commit_planes(dev, state, false);
 
 	drm_atomic_helper_commit_modeset_enables(dev, state);
 
@@ -115,7 +142,7 @@ static void complete_commit(struct msm_commit *c)
 	 * not be critical path)
 	 */
 
-	drm_atomic_helper_wait_for_vblanks(dev, state);
+	msm_atomic_wait_for_commit_done(dev, state);
 
 	drm_atomic_helper_cleanup_planes(dev, state);
 
@@ -139,7 +166,6 @@ static void add_fb(struct msm_commit *c, struct drm_framebuffer *fb)
 	c->fence = max(c->fence, msm_gem_fence(to_msm_bo(obj), MSM_PREP_READ));
 }
 
-
 int msm_atomic_check(struct drm_device *dev,
 		     struct drm_atomic_state *state)
 {
@@ -178,7 +204,7 @@ int msm_atomic_commit(struct drm_device *dev,
 {
 	int nplanes = dev->mode_config.num_total_plane;
 	int ncrtcs = dev->mode_config.num_crtc;
-	struct timespec timeout;
+	ktime_t timeout;
 	struct msm_commit *c;
 	int i, ret;
 
@@ -187,8 +213,10 @@ int msm_atomic_commit(struct drm_device *dev,
 		return ret;
 
 	c = commit_init(state);
-	if (!c)
-		return -ENOMEM;
+	if (!c) {
+		ret = -ENOMEM;
+		goto error;
+	}
 
 	/*
 	 * Figure out what crtcs we have:
@@ -221,7 +249,7 @@ int msm_atomic_commit(struct drm_device *dev,
 	ret = start_atomic(dev->dev_private, c->crtc_mask);
 	if (ret) {
 		kfree(c);
-		return ret;
+		goto error;
 	}
 
 	/*
@@ -253,16 +281,16 @@ int msm_atomic_commit(struct drm_device *dev,
 		return 0;
 	}
 
-	jiffies_to_timespec(jiffies + msecs_to_jiffies(1000), &timeout);
+	timeout = ktime_add_ms(ktime_get(), 1000);
 
-	ret = msm_wait_fence_interruptable(dev, c->fence, &timeout);
-	if (ret) {
-		WARN_ON(ret);  // TODO unswap state back?  or??
-		commit_destroy(c);
-		return ret;
-	}
+	/* uninterruptible wait */
+	msm_wait_fence(dev, c->fence, &timeout, false);
 
 	complete_commit(c);
 
 	return 0;
+
+error:
+	drm_atomic_helper_cleanup_planes(dev, state);
+	return ret;
 }