[PATCH v3 33/38] drm/msm: add support for MST non-blocking commits

[Yongxing Mou]

From: Abhinav Kumar <quic_abhinavk at quicinc.com>

Integrate MST framework APIs with atomic_commit_setup() and
atomic_commit_tail() to support non-blocking atomic commits
for DisplayPort MST.

This patch only applies to MST. For SST, non-blocking commits are
already handled via commit_tail(), which internally calls
drm_atomic_helper_wait_for_dependencies() in the DRM core.

Signed-off-by: Abhinav Kumar <quic_abhinavk at quicinc.com>
Signed-off-by: Yongxing Mou <yongxing.mou at oss.qualcomm.com>
---
 drivers/gpu/drm/msm/msm_atomic.c | 3 +++
 drivers/gpu/drm/msm/msm_kms.c    | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index 3aa0020dec3a90b693ad3d4171cfcffc091aad4c..b1656fb456d54af11ba8a30d4971fface114c7a1 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -4,6 +4,7 @@
  * Author: Rob Clark <robdclark at gmail.com>
  */
 
+#include <drm/display/drm_dp_mst_helper.h>
 #include <drm/drm_atomic_uapi.h>
 #include <drm/drm_vblank.h>
 #include <drm/display/drm_dp_mst_helper.h>
@@ -226,6 +227,8 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state)
 
 	trace_msm_atomic_commit_tail_start(async, crtc_mask);
 
+	drm_dp_mst_atomic_wait_for_dependencies(state);
+
 	kms->funcs->enable_commit(kms);
 
 	/*
diff --git a/drivers/gpu/drm/msm/msm_kms.c b/drivers/gpu/drm/msm/msm_kms.c
index 6889f1c1e72121dcc735fa460ea04cdab11c6705..09776be1d3d854f4c77d7df3afa8d56f53639411 100644
--- a/drivers/gpu/drm/msm/msm_kms.c
+++ b/drivers/gpu/drm/msm/msm_kms.c
@@ -10,6 +10,7 @@
 #include <linux/sched/mm.h>
 #include <uapi/linux/sched/types.h>
 
+#include <drm/display/drm_dp_mst_helper.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_mode_config.h>
 #include <drm/drm_vblank.h>
@@ -29,6 +30,7 @@ static const struct drm_mode_config_funcs mode_config_funcs = {
 
 static const struct drm_mode_config_helper_funcs mode_config_helper_funcs = {
 	.atomic_commit_tail = msm_atomic_commit_tail,
+	.atomic_commit_setup = drm_dp_mst_atomic_setup_commit,
 };
 
 static irqreturn_t msm_irq(int irq, void *arg)

-- 
2.34.1