From: Vinod Koul vkoul@kernel.org
This callback allows masters to compute the bus parameters required.
Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org --- drivers/soundwire/stream.c | 10 ++++++++++ include/linux/soundwire/sdw.h | 2 ++ 2 files changed, 12 insertions(+)
diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c index a0476755a459..60bc2fe42928 100644 --- a/drivers/soundwire/stream.c +++ b/drivers/soundwire/stream.c @@ -1483,6 +1483,16 @@ 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) { diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h index bea46bd8b6ce..aac68e879fae 100644 --- a/include/linux/soundwire/sdw.h +++ b/include/linux/soundwire/sdw.h @@ -718,6 +718,7 @@ 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 @@ -739,6 +740,7 @@ 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;