soundwire: add lane_used_bandwidth in struct sdw_bus

To support multi-lane, we need to know how much bandwidth
is used on each lane. And to use the lane that has enough
bandwidth.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20241218080155.102405-4-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index bb4e33a4db170675ecedd08a305c121ea344e80d..ae38ac848d383cb9da22adda727acc0b3bc43a49 100644 (file)
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -893,6 +893,7 @@ struct sdw_master_ops {
  * @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;
@@ -924,6 +925,7 @@ struct sdw_bus {
        struct dentry *debugfs;
 #endif
        bool multi_link;
+       unsigned int lane_used_bandwidth[SDW_MAX_LANES];
 };
 
 int sdw_bus_master_add(struct sdw_bus *bus, struct device *parent,