diff options
| author | Phani Kumar Uppalapati <phaniu@codeaurora.org> | 2016-03-22 21:16:44 -0700 |
|---|---|---|
| committer | Jeevan Shriram <jshriram@codeaurora.org> | 2016-05-06 12:06:19 -0700 |
| commit | 22ba2185dab87dd8da9bdb72f6aac257c707a082 (patch) | |
| tree | 2d2c5450084a9a56f4c4eccfa83855c07da42dc2 | |
| parent | 849a6fc42c73bffb3c00103eebd837c14d5e1729 (diff) | |
soundwire: Add API to control slave device data path
Add soundwire API to control slave device data path
enable or disable. This gives slave device drivers
more flexibility for data path control during device
path enablement.
CRs-fixed: 996586
Change-Id: Ic0ab015098035418458a5ba7c2ffad9df20f933c
Signed-off-by: Phani Kumar Uppalapati <phaniu@codeaurora.org>
| -rwxr-xr-x | drivers/soundwire/soundwire.c | 37 | ||||
| -rwxr-xr-x | include/linux/soundwire/soundwire.h | 5 |
2 files changed, 41 insertions, 1 deletions
diff --git a/drivers/soundwire/soundwire.c b/drivers/soundwire/soundwire.c index 23642fe38ef3..2ca4faedd4b3 100755 --- a/drivers/soundwire/soundwire.c +++ b/drivers/soundwire/soundwire.c @@ -240,6 +240,43 @@ void swr_port_response(struct swr_master *mstr, u8 tid) EXPORT_SYMBOL(swr_port_response); /** + * swr_slvdev_datapath_control - Enables/Disables soundwire slave device + * data path + * @dev: pointer to soundwire slave device + * @dev_num: device number of the soundwire slave device + * + * Returns error code for failure and 0 for success + */ +int swr_slvdev_datapath_control(struct swr_device *dev, u8 dev_num, + bool enable) +{ + struct swr_master *master; + + if (!dev) + return -ENODEV; + + master = dev->master; + if (!master) + return -EINVAL; + + if (dev->group_id) { + /* Broadcast */ + if (master->gr_sid != dev_num) { + if (!master->gr_sid) + master->gr_sid = dev_num; + else + return 0; + } + } + + if (master->slvdev_datapath_control) + master->slvdev_datapath_control(master, enable); + + return 0; +} +EXPORT_SYMBOL(swr_slvdev_datapath_control); + +/** * swr_connect_port - enable soundwire slave port(s) * @dev: pointer to soundwire slave device * @port_id: logical port id(s) of soundwire slave device diff --git a/include/linux/soundwire/soundwire.h b/include/linux/soundwire/soundwire.h index f19e871d6ac2..4b957245209e 100755 --- a/include/linux/soundwire/soundwire.h +++ b/include/linux/soundwire/soundwire.h @@ -1,4 +1,4 @@ -/* Copyright (c) 2015, The Linux Foundation. All rights reserved. +/* Copyright (c) 2015-2016, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -151,6 +151,7 @@ struct swr_master { const void *buf, size_t len); int (*get_logical_dev_num)(struct swr_master *mstr, u64 dev_id, u8 *dev_num); + void (*slvdev_datapath_control)(struct swr_master *mstr, bool enable); }; static inline struct swr_master *to_swr_master(struct device *dev) @@ -304,4 +305,6 @@ extern int swr_device_down(struct swr_device *swr_dev); extern int swr_reset_device(struct swr_device *swr_dev); +extern int swr_slvdev_datapath_control(struct swr_device *swr_dev, u8 dev_num, + bool enable); #endif /* _LINUX_SOUNDWIRE_H */ |