soundwire: move lane_used_bandwidth to sdw_bus_params

The lane_used_bandwidth variable store the used bandwidth of each lane.
It should belong to the sdw_bus_params struct instead of in the sdw_bus
struct directly. Besides, _sdw_prepare_stream() will restore the
bus->params, and the lane_used_bandwidth values will not be restored if
it is not in the params.

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

Author: bardliao

drivers/soundwire/generic_bandwidth_allocation.c

@@ -199,7 +199,7 @@ static void _sdw_compute_port_params(struct sdw_bus *bus,
 
 	/* Run loop for all groups to compute transport parameters */
 	for (l = 0; l < SDW_MAX_LANES; l++) {
-		if (l > 0 && !bus->lane_used_bandwidth[l])
+		if (l > 0 && !bus->params.lane_used_bandwidth[l])
 			continue;
 		/* reset hstop for each lane */
 		hstop = bus->params.col - 1;
@@ -270,7 +270,7 @@ static int sdw_compute_group_params(struct sdw_bus *bus,
 	}
 
 	for (l = 0; l < SDW_MAX_LANES; l++) {
-		if (l > 0 && !bus->lane_used_bandwidth[l])
+		if (l > 0 && !bus->params.lane_used_bandwidth[l])
 			continue;
 		/* reset column_needed for each lane */
 		column_needed = 0;
@@ -510,7 +510,7 @@ static int get_manager_lane(struct sdw_bus *bus, struct sdw_master_runtime *m_rt
 					      m_rt->stream->params.bps;
 		}
 		if (required_bandwidth <=
-		    curr_dr_freq - bus->lane_used_bandwidth[l]) {
+		    curr_dr_freq - bus->params.lane_used_bandwidth[l]) {
 			/* Check if m_lane is connected to all Peripherals */
 			if (!is_lane_connected_to_all_peripherals(m_rt,
 				slave_prop->lane_maps[l])) {
@@ -521,7 +521,7 @@ static int get_manager_lane(struct sdw_bus *bus, struct sdw_master_runtime *m_rt
 			}
 			m_lane = slave_prop->lane_maps[l];
 			dev_dbg(&s_rt->slave->dev, "M lane %d is used\n", m_lane);
-			bus->lane_used_bandwidth[l] += required_bandwidth;
+			bus->params.lane_used_bandwidth[l] += required_bandwidth;
 			/*
 			 * Use non-zero manager lane, subtract the lane 0
 			 * bandwidth that is already calculated

drivers/soundwire/stream.c

@@ -1794,8 +1794,8 @@ static int _sdw_deprepare_stream(struct sdw_stream_runtime *stream)
 			bandwidth = m_rt->stream->params.rate * hweight32(p_rt->ch_mask) *
 				    m_rt->stream->params.bps;
 			multi_lane_bandwidth += bandwidth;
-			bus->lane_used_bandwidth[p_rt->lane] -= bandwidth;
-			if (!bus->lane_used_bandwidth[p_rt->lane])
+			bus->params.lane_used_bandwidth[p_rt->lane] -= bandwidth;
+			if (!bus->params.lane_used_bandwidth[p_rt->lane])
 				p_rt->lane = 0;
 		}
 		/* TODO: Update this during Device-Device support */

include/linux/soundwire/sdw.h

@@ -589,6 +589,7 @@ enum sdw_port_prep_ops {
  * @max_dr_freq: Maximum double rate clock frequency supported, in Hz
  * @curr_dr_freq: Current double rate clock frequency, in Hz
  * @bandwidth: Current bandwidth
+ * @lane_used_bandwidth: how much bandwidth in bits per second is used by each lane
  * @col: Active columns
  * @row: Active rows
  * @s_data_mode: NORMAL, STATIC or PRBS mode for all Slave ports
@@ -602,6 +603,7 @@ struct sdw_bus_params {
 	unsigned int max_dr_freq;
 	unsigned int curr_dr_freq;
 	unsigned int bandwidth;
+	unsigned int lane_used_bandwidth[SDW_MAX_LANES];
 	unsigned int col;
 	unsigned int row;
 	int s_data_mode;
@@ -1027,7 +1029,6 @@ struct sdw_stream_runtime {
  * @multi_link: Store bus property that indicates if multi links
  * are supported. This flag is populated by drivers after reading
  * appropriate firmware (ACPI/DT).
- * @lane_used_bandwidth: how much bandwidth in bits per second is used by each lane
  */
 struct sdw_bus {
 	struct device *dev;
@@ -1062,7 +1063,6 @@ struct sdw_bus {
 	struct dentry *debugfs;
 #endif
 	bool multi_link;
-	unsigned int lane_used_bandwidth[SDW_MAX_LANES];
 };
 
 struct sdw_stream_runtime *sdw_alloc_stream(const char *stream_name, enum sdw_stream_type type);