soundwire: add static port mapping support

Some of the SoundWire device ports are statically mapped to Controller
ports during design, however there is no way to expose this information
to the controller. Controllers like Qualcomm ones use this info to setup
static bandwidth parameters for those ports.

A generic port allocation is not possible in this cases!
So this patch adds a new member m_port_map to struct sdw_slave to expose
this static map.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210315165650.13392-2-srinivas.kandagatla@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index 5ff9a8f37e91222a21f4e62fa40b76d383d1b0bf..ced07f8fde8701fddbd814b10d8e5eb645744a77 100644 (file)
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -642,6 +642,7 @@ struct sdw_slave_ops {
  * @debugfs: Slave debugfs
  * @node: node for bus list
  * @port_ready: Port ready completion flag for each Slave port
+ * @m_port_map: static Master port map for each Slave port
  * @dev_num: Current Device Number, values can be 0 or dev_num_sticky
  * @dev_num_sticky: one-time static Device Number assigned by Bus
  * @probed: boolean tracking driver state
@@ -673,6 +674,7 @@ struct sdw_slave {
 #endif
        struct list_head node;
        struct completion port_ready[SDW_MAX_PORTS];
+       unsigned int m_port_map[SDW_MAX_PORTS];
        enum sdw_clk_stop_mode curr_clk_stop_mode;
        u16 dev_num;
        u16 dev_num_sticky;