[PATCH 38/45] drm/msm: initialize DRM MST encoders for DP controllers

[Abhinav Kumar <quic_abhinavk@quicinc.com>]

Initiliaze a DPMST encoder for each  MST capable DP controller
and the number of encoders it supports depends on the number
of streams it supports. Replace the opencoded instances of max_stream
with the newly introduced API to centralize the usage.

Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h |  2 ++
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c     | 23 ++++++++++++++++++++++-
 drivers/gpu/drm/msm/dp/dp_display.c         | 26 +++++++++++++++++++++-----
 drivers/gpu/drm/msm/msm_drv.h               | 14 ++++++++++++++
 4 files changed, 59 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
index 92b5ee390788d16e85e195a664417896a2bf1cae..618a5b6f8222882ed8c972a78a26f8c25ca389a8 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
@@ -28,6 +28,7 @@
  * @h_tile_instance:    Controller instance used per tile. Number of elements is
  *                      based on num_of_h_tiles
  * @is_cmd_mode		Boolean to indicate if the CMD mode is requested
+ * @stream_id		stream id for which the interface needs to be acquired
  * @vsync_source:	Source of the TE signal for DSI CMD devices
  */
 struct msm_display_info {
@@ -35,6 +36,7 @@ struct msm_display_info {
 	uint32_t num_of_h_tiles;
 	uint32_t h_tile_instance[MAX_H_TILES_PER_DISPLAY];
 	bool is_cmd_mode;
+	int stream_id;
 	enum dpu_vsync_source vsync_source;
 };
 
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 8b251f87a0520da0807b9b7aed17493990e41627..359de04abf4bbead3daa5e8b357a3c34216e3e65 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -636,7 +636,8 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev,
 	struct msm_display_info info;
 	bool yuv_supported;
 	int rc;
-	int i;
+	int i, stream_id;
+	int stream_cnt;
 
 	for (i = 0; i < ARRAY_SIZE(priv->dp); i++) {
 		if (!priv->dp[i])
@@ -659,6 +660,26 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev,
 			DPU_ERROR("modeset_init failed for DP, rc = %d\n", rc);
 			return rc;
 		}
+
+		stream_cnt = msm_dp_get_mst_max_stream(priv->dp[i]);
+
+		if (stream_cnt > 1) {
+			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);
+				if (IS_ERR(encoder)) {
+					DPU_ERROR("encoder init failed for dp mst display\n");
+					return PTR_ERR(encoder);
+				}
+
+				rc = msm_dp_mst_bridge_init(priv->dp[i], encoder);
+				if (rc) {
+					DPU_ERROR("dp mst bridge %d init failed, %d\n",
+						  stream_id, rc);
+					continue;
+				}
+			}
+		}
 	}
 
 	return 0;
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 80df79a7c2077d49184cdeb7b801bf0699ff4ece..eafec9ab4f83cb44e861687e7550748b4d9b7ece 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -432,7 +432,8 @@ static int msm_dp_display_process_hpd_high(struct msm_dp_display_private *dp)
 	if (rc)
 		goto end;
 
-	if (dp->max_stream <= DEFAULT_STREAM_COUNT || !msm_dp_panel_read_mst_cap(dp->panel)) {
+	if (msm_dp_get_mst_max_stream(dp_display) <= DEFAULT_STREAM_COUNT ||
+	    !msm_dp_panel_read_mst_cap(dp->panel)) {
 		rc = msm_dp_panel_read_edid(dp->panel, connector);
 		if (rc)
 			goto end;
@@ -457,7 +458,8 @@ static int msm_dp_display_process_hpd_high(struct msm_dp_display_private *dp)
 	 */
 	msm_dp_link_psm_config(dp->link, &dp->panel->link_info, false);
 
-	if (dp->max_stream > DEFAULT_STREAM_COUNT && msm_dp_panel_read_mst_cap(dp->panel))
+	if (msm_dp_get_mst_max_stream(dp_display) > DEFAULT_STREAM_COUNT &&
+	    msm_dp_panel_read_mst_cap(dp->panel))
 		msm_dp_display_mst_init(dp);
 
 	msm_dp_link_reset_phy_params_vx_px(dp->link);
@@ -977,7 +979,7 @@ static int msm_dp_display_enable(struct msm_dp_display_private *dp,
 
 	drm_dbg_dp(dp->drm_dev, "sink_count=%d\n", dp->link->sink_count);
 
-	rc = msm_dp_ctrl_on_stream(dp->ctrl, msm_dp_panel, dp->max_stream);
+	rc = msm_dp_ctrl_on_stream(dp->ctrl, msm_dp_panel, msm_dp_get_mst_max_stream(&dp->msm_dp_display));
 
 	return rc;
 }
@@ -1444,6 +1446,20 @@ static int msm_dp_display_get_connector_type(struct platform_device *pdev,
 	return connector_type;
 }
 
+int msm_dp_get_mst_max_stream(const struct msm_dp *dp_display)
+{
+	struct msm_dp_display_private *dp_priv;
+
+	dp_priv = container_of(dp_display, struct msm_dp_display_private, msm_dp_display);
+
+	return dp_priv->max_stream;
+}
+
+int msm_dp_mst_bridge_init(struct msm_dp *dp_display, struct drm_encoder *encoder)
+{
+	return msm_dp_mst_drm_bridge_init(dp_display, encoder);
+}
+
 static int msm_dp_display_probe(struct platform_device *pdev)
 {
 	int rc = 0;
@@ -1745,12 +1761,12 @@ void msm_dp_display_disable_helper(struct msm_dp *dp, struct msm_dp_panel *msm_d
 		return;
 	}
 
-	if (msm_dp_display->max_stream > DEFAULT_STREAM_COUNT)
+	if (msm_dp_get_mst_max_stream(dp) > DEFAULT_STREAM_COUNT)
 		msm_dp_ctrl_push_vcpf(msm_dp_display->ctrl, msm_dp_panel);
 	else
 		msm_dp_ctrl_push_idle(msm_dp_display->ctrl);
 
-	if (msm_dp_display->max_stream > DEFAULT_STREAM_COUNT) {
+	if (msm_dp_get_mst_max_stream(dp) > DEFAULT_STREAM_COUNT) {
 		msm_dp_ctrl_mst_stream_channel_slot_setup(msm_dp_display->ctrl,
 							  msm_dp_display->max_stream);
 		msm_dp_ctrl_mst_send_act(msm_dp_display->ctrl);
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 1616a4682795f6b9b30cc0bef2baf448ccc62bc0..12b50a797772f574122481cd8a1c7c88aacb8250 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -372,6 +372,10 @@ bool msm_dp_needs_periph_flush(const struct msm_dp *dp_display,
 			       const struct drm_display_mode *mode);
 bool msm_dp_wide_bus_available(const struct msm_dp *dp_display);
 
+int msm_dp_get_mst_max_stream(const struct msm_dp *dp_display);
+
+int msm_dp_mst_bridge_init(struct msm_dp *dp_display, struct drm_encoder *encoder);
+
 #else
 static inline int __init msm_dp_register(void)
 {
@@ -388,6 +392,16 @@ static inline int msm_dp_modeset_init(struct msm_dp *dp_display,
 	return -EINVAL;
 }
 
+static inline int msm_dp_get_mst_max_stream(struct msm_dp *dp_display)
+{
+	return -EINVAL;
+}
+
+int msm_dp_mst_bridge_init(struct msm_dp *dp_display, struct drm_encoder *encoder)
+{
+	return -EINVAL;
+}
+
 static inline void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp_display)
 {
 }

-- 
2.34.1