[Not for upstream] SoundWire: add lane kernel parameter

We can use the parameters to specify data lane.
And we can know which lane is used by the debug trace.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

drivers/soundwire/generic_bandwidth_allocation.c

@@ -50,6 +50,7 @@ void sdw_compute_slave_ports(struct sdw_master_runtime *m_rt,
 		list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
 			ch = hweight32(p_rt->ch_mask);
 
+			dev_dbg(&s_rt->slave->dev, "%s p_rt->lane %d\n", __func__, p_rt->lane);
 			sdw_fill_xport_params(&p_rt->transport_params,
 					      p_rt->num, false,
 					      SDW_BLK_GRP_CNT_1,
@@ -106,6 +107,7 @@ static void sdw_compute_master_ports(struct sdw_master_runtime *m_rt,
 
 	list_for_each_entry(p_rt, &m_rt->port_list, port_node) {
 
+		dev_dbg(bus->dev, "%s p_rt->lane %d\n", __func__, p_rt->lane);
 		sdw_fill_xport_params(&p_rt->transport_params, p_rt->num,
 				      false, SDW_BLK_GRP_CNT_1, sample_int,
 				      *port_bo, (*port_bo) >> 8, hstart, hstop,

drivers/soundwire/stream.c

@@ -17,6 +17,14 @@
 #include <sound/soc.h>
 #include "bus.h"
 
+static int m_lane;
+module_param(m_lane, int, 0444);
+MODULE_PARM_DESC(m_lane, "Manager lane");
+
+static int p_lane;
+module_param(p_lane, int, 0444);
+MODULE_PARM_DESC(p_lane, "Peripheral lane");
+
 /*
  * Array of supported rows and columns as per MIPI SoundWire Specification 1.1
  *
@@ -990,6 +998,7 @@ static int sdw_slave_port_config(struct sdw_slave *slave,
 		ret = sdw_port_config(p_rt, port_config, i);
 		if (ret < 0)
 			return ret;
+		p_rt->lane = p_lane;
 		i++;
 	}
 
@@ -1038,6 +1047,7 @@ static int sdw_master_port_config(struct sdw_master_runtime *m_rt,
 		ret = sdw_port_config(p_rt, port_config, i);
 		if (ret < 0)
 			return ret;
+		p_rt->lane = m_lane;
 		i++;
 	}