soundwire: intel: call helper to reset Slave states on resume

This helps make sure they are all UNATTACHED and reset the state
machines.

At the moment we perform a bus reset both for system resume and
pm_runtime resume, this will be modified when clock-stop mode is
supported

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200817152923.3259-5-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 00c5de1250ec1ebc84935fb832c99372c38fec35..10dd0e208ce7ab18713c2bc7e579150a7204600b 100644 (file)
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -1516,6 +1516,12 @@ static int intel_resume(struct device *dev)
                return ret;
        }
 
+       /*
+        * make sure all Slaves are tagged as UNATTACHED and provide
+        * reason for reinitialization
+        */
+       sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
+
        ret = sdw_cdns_enable_interrupt(cdns, true);
        if (ret < 0) {
                dev_err(dev, "cannot enable interrupts during resume\n");
@@ -1562,6 +1568,12 @@ static int intel_resume_runtime(struct device *dev)
                return ret;
        }
 
+       /*
+        * make sure all Slaves are tagged as UNATTACHED and provide
+        * reason for reinitialization
+        */
+       sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
+
        ret = sdw_cdns_enable_interrupt(cdns, true);
        if (ret < 0) {
                dev_err(dev, "cannot enable interrupts during resume\n");