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From f2f4c8b629c3d2fd798ca2c93d673fe64748c4a3 Mon Sep 17 00:00:00 2001
From: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Date: Tue, 20 Jun 2017 10:42:33 -0400
Subject: [PATCH 0533/4131] drm/amd/display: Add global lock function.
Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
.../drm/amd/display/amdgpu_dm/amdgpu_dm_types.c | 66 ++++++++++++++++------
1 file changed, 49 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
index 7a050aa..e88911f 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
@@ -3040,6 +3040,49 @@ static enum surface_update_type amdgpu_dm_check_surfaces_update_type(
return update_type;
}
+/*`
+ * Grabs all modesetting locks to serialize against any blocking commits,
+ * Waits for completion of all non blocking commits.
+ */
+static void aquire_global_lock(
+ struct drm_device *dev,
+ struct drm_atomic_state *state)
+{
+ struct drm_crtc *crtc;
+ struct drm_crtc_commit *commit;
+ long ret;
+
+ /* Adding all modeset locks to aquire_ctx will
+ * ensure that when the framework release it the
+ * extra locks we are locking here will get released to
+ */
+ drm_modeset_lock_all_ctx(dev, state->acquire_ctx);
+
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+ spin_lock(&crtc->commit_lock);
+ commit = list_first_entry_or_null(&crtc->commit_list,
+ struct drm_crtc_commit, commit_entry);
+ if (commit)
+ drm_crtc_commit_get(commit);
+ spin_unlock(&crtc->commit_lock);
+
+ if (!commit)
+ continue;
+
+ /* Make sure all pending HW programming completed and
+ * page flips done
+ */
+ ret = wait_for_completion_timeout(&commit->hw_done,
+ 10*HZ);
+ ret = wait_for_completion_timeout(&commit->flip_done,
+ 10*HZ);
+ if (ret == 0)
+ DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n",
+ crtc->base.id, crtc->name);
+ drm_crtc_commit_put(commit);
+ }
+}
+
int amdgpu_dm_atomic_check(struct drm_device *dev,
struct drm_atomic_state *state)
{
@@ -3296,7 +3339,7 @@ int amdgpu_dm_atomic_check(struct drm_device *dev,
dc,
set[i].surfaces,
set[i].surface_count,
- set[i].stream) > UPDATE_TYPE_MED) {
+ set[i].stream) > UPDATE_TYPE_FAST) {
wait_for_prev_commits = true;
break;
}
@@ -3310,25 +3353,14 @@ int amdgpu_dm_atomic_check(struct drm_device *dev,
* For full updates case when
* removing/adding/updateding streams on once CRTC while flipping
* on another CRTC,
- * Adding all current active CRTC's states to the atomic commit in
- * amdgpu_dm_atomic_check will guarantee that any such full update commit
+ * acquiring global lock will guarantee that any such full
+ * update commit
* will wait for completion of any outstanding flip using DRMs
* synchronization events.
*/
- if (wait_for_prev_commits) {
- list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
- struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
- struct drm_crtc_state *crtc_state;
-
- if (acrtc->stream) {
- crtc_state = drm_atomic_get_crtc_state(state, crtc);
- if (IS_ERR(crtc_state)) {
- ret = PTR_ERR(crtc_state);
- break;
- }
- }
- }
- }
+ if (wait_for_prev_commits)
+ aquire_global_lock(dev, state);
+
}
if (context) {
--
2.7.4
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