From fb43d62ee772fac7173bfbed3ca1bccdc508f10a Mon Sep 17 00:00:00 2001 From: Pierre-Louis Bossart Date: Tue, 14 Mar 2023 09:54:04 +0800 Subject: soundwire: intel: move bank switch routine to common intel_bus_common.c No functionality change, just moving the routines to a common file so that they can be used for new hardware. Signed-off-by: Pierre-Louis Bossart Reviewed-by: Rander Wang Signed-off-by: Bard Liao Link: https://lore.kernel.org/r/20230314015410.487311-11-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul --- drivers/soundwire/intel_bus_common.c | 49 ++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) (limited to 'drivers/soundwire/intel_bus_common.c') diff --git a/drivers/soundwire/intel_bus_common.c b/drivers/soundwire/intel_bus_common.c index 9a06ab58018b..f180e3bea989 100644 --- a/drivers/soundwire/intel_bus_common.c +++ b/drivers/soundwire/intel_bus_common.c @@ -208,3 +208,52 @@ int intel_stop_bus(struct sdw_intel *sdw, bool clock_stop) return 0; } + +/* + * bank switch routines + */ + +int intel_pre_bank_switch(struct sdw_intel *sdw) +{ + struct sdw_cdns *cdns = &sdw->cdns; + struct sdw_bus *bus = &cdns->bus; + + /* Write to register only for multi-link */ + if (!bus->multi_link) + return 0; + + sdw_intel_sync_arm(sdw); + + return 0; +} + +int intel_post_bank_switch(struct sdw_intel *sdw) +{ + struct sdw_cdns *cdns = &sdw->cdns; + struct sdw_bus *bus = &cdns->bus; + int ret = 0; + + /* Write to register only for multi-link */ + if (!bus->multi_link) + return 0; + + mutex_lock(sdw->link_res->shim_lock); + + /* + * post_bank_switch() ops is called from the bus in loop for + * all the Masters in the steam with the expectation that + * we trigger the bankswitch for the only first Master in the list + * and do nothing for the other Masters + * + * So, set the SYNCGO bit only if CMDSYNC bit is set for any Master. + */ + if (sdw_intel_sync_check_cmdsync_unlocked(sdw)) + ret = sdw_intel_sync_go_unlocked(sdw); + + mutex_unlock(sdw->link_res->shim_lock); + + if (ret < 0) + dev_err(sdw->cdns.dev, "Post bank switch failed: %d\n", ret); + + return ret; +} -- cgit v1.2.3