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drm/amd/display: Add global lock function.

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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>
This commit is contained in:
Andrey Grodzovsky 2017-06-20 10:42:33 -04:00 committed by Alex Deucher
parent 80c62d3a11
commit 03c8a5feee
1 changed files with 48 additions and 16 deletions
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64
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
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@ -2890,6 +2890,49 @@ 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)
{
@ -3146,7 +3189,7 @@ 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;
}
@ -3160,25 +3203,14 @@ 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 (wait_for_prev_commits)
aquire_global_lock(dev, 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 (context) {