Commit c7578c1d authored by Vinod Koul's avatar Vinod Koul
Browse files

soundwire: Add compute_params callback 



This callback allows masters to compute the bus parameters required.

Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20190813083550.5877-2-srinivas.kandagatla@linaro.org


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent a2e48458

drivers/soundwire/stream.c

+10 −0
Original line number Diff line number Diff line
@@ -1485,6 +1485,16 @@ static int _sdw_prepare_stream(struct sdw_stream_runtime *stream) 
		bus->params.bandwidth += m_rt->stream->params.rate *

			m_rt->ch_count * m_rt->stream->params.bps;



		/* Compute params */

		if (bus->compute_params) {

			ret = bus->compute_params(bus);

			if (ret < 0) {

				dev_err(bus->dev, "Compute params failed: %d",

					ret);

				return ret;

			}

		}



		/* Program params */

		ret = sdw_program_params(bus);

		if (ret < 0) {

include/linux/soundwire/sdw.h

+2 −0
Original line number Diff line number Diff line
@@ -728,6 +728,7 @@ struct sdw_master_ops { 
 * Bit set implies used number, bit clear implies unused number.

 * @bus_lock: bus lock

 * @msg_lock: message lock

 * @compute_params: points to Bus resource management implementation

 * @ops: Master callback ops

 * @port_ops: Master port callback ops

 * @params: Current bus parameters
@@ -750,6 +751,7 @@ struct sdw_bus { 
	DECLARE_BITMAP(assigned, SDW_MAX_DEVICES);

	struct mutex bus_lock;

	struct mutex msg_lock;

	int (*compute_params)(struct sdw_bus *bus);

	const struct sdw_master_ops *ops;

	const struct sdw_master_port_ops *port_ops;

	struct sdw_bus_params params;

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