disp: msm: dp: add debug node to capture source and sink crc

This change adds a debug node named 'crc' to drm_dp to read
the frame CRC values for DP controller and DP Sink. In order
to facilitate the immediate read of the CRC values when
accessed, it enables the CRC calculation on the controller
and sink automatically when the stream is enabled. In addition
to the frame CRC values it also reads the MISR values from
controller and PHY to validate the data flow from controller
to PHY.

Change-Id: I1acee2dba931e4635caf4a400e336a72c86e88bf
Signed-off-by: Rajkumar Subbiah <quic_rsubbia@quicinc.com>

msm/dp/dp_ctrl.c

@@ -1308,6 +1308,7 @@ static int dp_ctrl_stream_on(struct dp_ctrl *dp_ctrl, struct dp_panel *panel)
 	/* wait for link training completion before fec config as per spec */
 	dp_ctrl_fec_setup(ctrl);
 	dp_ctrl_dsc_setup(ctrl, panel);
+	panel->sink_crc_enable(panel, true);
 
 	return rc;
 }
@@ -1515,6 +1516,30 @@ void dp_ctrl_set_sim_mode(struct dp_ctrl *dp_ctrl, bool en)
 	DP_INFO("sim_mode=%d\n", ctrl->sim_mode);
 }
 
+int dp_ctrl_setup_misr(struct dp_ctrl *dp_ctrl)
+{
+	struct dp_ctrl_private *ctrl;
+
+	if (!dp_ctrl)
+		return -EINVAL;
+
+	ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
+
+	return ctrl->catalog->setup_misr(ctrl->catalog);
+}
+
+int dp_ctrl_read_misr(struct dp_ctrl *dp_ctrl, struct dp_misr40_data *data)
+{
+	struct dp_ctrl_private *ctrl;
+
+	if (!dp_ctrl)
+		return -EINVAL;
+
+	ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
+
+	return ctrl->catalog->read_misr(ctrl->catalog, data);
+}
+
 struct dp_ctrl *dp_ctrl_get(struct dp_ctrl_in *in)
 {
 	int rc = 0;
@@ -1565,6 +1590,8 @@ struct dp_ctrl *dp_ctrl_get(struct dp_ctrl_in *in)
 	dp_ctrl->stream_pre_off = dp_ctrl_stream_pre_off;
 	dp_ctrl->set_mst_channel_info = dp_ctrl_set_mst_channel_info;
 	dp_ctrl->set_sim_mode = dp_ctrl_set_sim_mode;
+	dp_ctrl->setup_misr = dp_ctrl_setup_misr;
+	dp_ctrl->read_misr = dp_ctrl_read_misr;
 
 	return dp_ctrl;
 error: