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soundwire: Add compute_params callback 

This callback allows masters to compute the bus parameters required.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20190813083550.5877-2-srinivas.kandagatla@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
alistair/sunxi64-5.4-dsi
Vinod Koul 2019-08-13 09:35:46 +01:00
parent a2e484585a
commit c7578c1d62
2 changed files with 12 additions and 0 deletions
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10
drivers/soundwire/stream.c
View File

@ -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) {

2
include/linux/soundwire/sdw.h
View File

@ -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;