[PATCH v2 34/38] drm/msm/dp: initialize dp_mst module for each DP MST controller

[Yongxing Mou]

From: Abhinav Kumar <quic_abhinavk at quicinc.com>

For each MST capable DP controller, initialize a dp_mst module to
manage its DP MST operations. The DP MST module for each controller
is the central entity to manage its topology related operations as
well as interfacing with the rest of the DP driver.

Signed-off-by: Abhinav Kumar <quic_abhinavk at quicinc.com>
Signed-off-by: Yongxing Mou <quic_yongmou at quicinc.com>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 6 ++++++
 drivers/gpu/drm/msm/dp/dp_display.c     | 9 +++++++++
 drivers/gpu/drm/msm/msm_drv.h           | 6 ++++++
 3 files changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 45fedf7e74e9c6dfed4bde57eb675e3dd1762fc7..e030476dc4c69448886c29bcfe8ff3105949b129 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -680,6 +680,12 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev,
 		stream_cnt = msm_dp_get_mst_max_stream(priv->dp[i]);
 
 		if (stream_cnt > 1) {
+			rc = msm_dp_mst_register(priv->dp[i]);
+			if (rc) {
+				DPU_ERROR("dp_mst_init failed for DP, rc = %d\n", rc);
+				return rc;
+			}
+
 			for (stream_id = 0; stream_id < stream_cnt; stream_id++) {
 				info.stream_id = stream_id;
 				encoder = dpu_encoder_init(dev, DRM_MODE_ENCODER_DPMST, &info);
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index ab1ad0cb6427eb4f86ee8ac6c76788b1a78892a8..526389c718edccbac9b5a91e8dabf0d84ed1a8b0 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1667,6 +1667,15 @@ int msm_dp_modeset_init(struct msm_dp *msm_dp_display, struct drm_device *dev,
 	return 0;
 }
 
+int msm_dp_mst_register(struct msm_dp *dp)
+{
+	struct msm_dp_display_private *dp_display;
+
+	dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
+
+	return msm_dp_mst_init(dp, dp_display->max_stream, dp_display->aux);
+}
+
 void msm_dp_display_atomic_prepare(struct msm_dp *dp)
 {
 	int rc = 0;
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index dd403107b640ee5ef333d2773b52e38e3869155f..1496700c38ad73d6edcf56fbb0ebf66505c608bf 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -374,6 +374,7 @@ bool msm_dp_wide_bus_available(const struct msm_dp *dp_display);
 
 int msm_dp_get_mst_max_stream(struct msm_dp *dp_display);
 int msm_dp_mst_bridge_init(struct msm_dp *dp_display, struct drm_encoder *encoder);
+int msm_dp_mst_register(struct msm_dp *dp_display);
 
 #else
 static inline int __init msm_dp_register(void)
@@ -401,6 +402,11 @@ static inline int msm_dp_mst_bridge_init(struct msm_dp *dp_display, struct drm_e
 	return -EINVAL;
 }
 
+static inline int msm_dp_mst_register(struct msm_dp *dp_display)
+{
+	return -EINVAL;
+}
+
 static inline void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp_display)
 {
 }

-- 
2.34.1