[PATCH v6 25/29] drm/msm/dp: wire MST helpers into atomic check and commit paths

[Yongxing Mou <yongxing.mou@oss.qualcomm.com>]

Call drm_dp_mst_atomic_check() from msm_atomic_check() so MST-specific
state, such as connector and topology changes, is validated as part of
the atomic check.

Hook the MST helpers into atomic_commit_setup() and
atomic_commit_tail() to support non-blocking atomic commits for
DisplayPort MST, and ensure MST commits properly wait for dependencies.

For SST, non-blocking commits are already handled via commit_tail(),
which waits for dependencies in the DRM core.

Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Yongxing Mou <yongxing.mou@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
 drivers/gpu/drm/msm/msm_atomic.c | 14 +++++++++++++-
 drivers/gpu/drm/msm/msm_drv.h    |  1 +
 drivers/gpu/drm/msm/msm_kms.c    |  1 +
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index a8babf1dbe0d..e70e5088cfe5 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@gmail.com>
  */
 
+#include <drm/display/drm_dp_mst_helper.h>
 #include <drm/drm_atomic_uapi.h>
 #include <drm/drm_vblank.h>
 
@@ -207,7 +208,11 @@ int msm_atomic_check(struct drm_device *dev, struct drm_atomic_commit *state)
 	if (ret)
 		return ret;
 
-	return drm_atomic_helper_check(dev, state);
+	ret = drm_atomic_helper_check(dev, state);
+	if (ret)
+		return ret;
+
+	return drm_dp_mst_atomic_check(state);
 }
 
 void msm_atomic_commit_tail(struct drm_atomic_commit *state)
@@ -221,6 +226,8 @@ void msm_atomic_commit_tail(struct drm_atomic_commit *state)
 
 	trace_msm_atomic_commit_tail_start(async, crtc_mask);
 
+	drm_dp_mst_atomic_wait_for_dependencies(state);
+
 	kms->funcs->enable_commit(kms);
 
 	/*
@@ -322,3 +329,8 @@ void msm_atomic_commit_tail(struct drm_atomic_commit *state)
 
 	trace_msm_atomic_commit_tail_finish(async, crtc_mask);
 }
+
+int msm_atomic_commit_setup(struct drm_atomic_commit *state)
+{
+	return drm_dp_mst_atomic_setup_commit(state);
+}
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index e9a7c9332707..fd0675797fd1 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -211,6 +211,7 @@ int msm_atomic_init_pending_timer(struct msm_pending_timer *timer,
 		struct msm_kms *kms, int crtc_idx);
 void msm_atomic_destroy_pending_timer(struct msm_pending_timer *timer);
 void msm_atomic_commit_tail(struct drm_atomic_commit *state);
+int msm_atomic_commit_setup(struct drm_atomic_commit *state);
 int msm_atomic_check(struct drm_device *dev, struct drm_atomic_commit *state);
 struct drm_atomic_commit *msm_atomic_state_alloc(struct drm_device *dev);
 
diff --git a/drivers/gpu/drm/msm/msm_kms.c b/drivers/gpu/drm/msm/msm_kms.c
index e5d0ea629448..33ab30300e16 100644
--- a/drivers/gpu/drm/msm/msm_kms.c
+++ b/drivers/gpu/drm/msm/msm_kms.c
@@ -29,6 +29,7 @@ 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 = msm_atomic_commit_setup,
 };
 
 static irqreturn_t msm_irq(int irq, void *arg)

-- 
2.43.0