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slimbus: stream: add support to control port disconnect

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There is a requirement where slimbus slave don't expect ports
to be disconnected during stream unprepare for sample rates other
than 44.1/88.2k, which is causing mute issues.

Added new slim_stream_unprepare_disconnect_port API to support
disconnect port request from clients without freeing port memory
allocated during stream prepare.

Change-Id: Idb00a1fdf15d864cb6ee82f67c0db4777434b296
Signed-off-by: Anvesh Salveru <quic_asalveru@quicinc.com>
This commit is contained in:
Anvesh Salveru 2021-12-06 06:38:56 -08:00
parent 2a4f51784d
commit 62819c8417
2 changed files with 46 additions and 0 deletions
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44
drivers/slimbus/stream.c
View File

@ -482,6 +482,50 @@ int slim_stream_unprepare(struct slim_stream_runtime *stream)
}
EXPORT_SYMBOL_GPL(slim_stream_unprepare);
/**
* slim_stream_unprepare_disconnect_port() - Un-prepare and disconnect
* selected SLIMbus Stream ports
*
* @stream: instance of slim stream runtime to unprepare
* @disconnect_ports: disconnect the ports of the stream
* @is_session_completed: free the ports allocated to the stream
*
* This API will disconnect all the ports and un allocate all the ports and
* channels associated with SLIMbus stream.
*
* Return: zero on success and error code on failure. From ASoC DPCM framework,
* this state is linked to trigger() stop operation.
*/
int slim_stream_unprepare_disconnect_port(struct slim_stream_runtime *stream,
bool disconnect_ports, bool is_session_completed)
{
int i;
if (!stream) {
pr_err("%s: Stream is NULL, Check from client side\n", __func__);
return -EINVAL;
}
if (!stream->ports || !stream->num_ports) {
pr_err("%s: Stream port is NULL %d\n", __func__, stream->num_ports);
return -EINVAL;
}
if (disconnect_ports) {
for (i = 0; i < stream->num_ports; i++)
slim_disconnect_port(stream, &stream->ports[i]);
}
if (is_session_completed) {
kfree(stream->ports);
stream->ports = NULL;
stream->num_ports = 0;
}
return 0;
}
EXPORT_SYMBOL(slim_stream_unprepare_disconnect_port);
/**
* slim_stream_free() - Free a SLIMbus Stream
*

2
include/linux/slimbus.h
View File

@ -207,6 +207,8 @@ int slim_stream_prepare(struct slim_stream_runtime *stream,
int slim_stream_enable(struct slim_stream_runtime *stream);
int slim_stream_disable(struct slim_stream_runtime *stream);
int slim_stream_unprepare(struct slim_stream_runtime *stream);
int slim_stream_unprepare_disconnect_port(struct slim_stream_runtime *stream,
bool disconnect_ports, bool is_session_completed);
int slim_stream_free(struct slim_stream_runtime *stream);
#endif /* _LINUX_SLIMBUS_H */