summaryrefslogtreecommitdiff
path: root/drivers/soundwire/intel_bus_common.c
diff options
context:
space:
mode:
authorPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>2023-03-14 04:54:04 +0300
committerVinod Koul <vkoul@kernel.org>2023-03-15 16:54:02 +0300
commitfb43d62ee772fac7173bfbed3ca1bccdc508f10a (patch)
treee664cc81466428b2764ff4e37a62eaa2d4468079 /drivers/soundwire/intel_bus_common.c
parent1e76de2e5dfeff17f13afe8146449fec3f5b69f7 (diff)
downloadlinux-fb43d62ee772fac7173bfbed3ca1bccdc508f10a.tar.xz
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 <pierre-louis.bossart@linux.intel.com> Reviewed-by: Rander Wang <rander.wang@intel.com> Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com> Link: https://lore.kernel.org/r/20230314015410.487311-11-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/soundwire/intel_bus_common.c')
-rw-r--r--drivers/soundwire/intel_bus_common.c49
1 files changed, 49 insertions, 0 deletions
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;
+}