[alsa-devel] [PATCH 4/6] soundwire: cadence_master: remove config update for interrupt setting

[Pierre-Louis Bossart]

From: Rander Wang <rander.wang at intel.com>

Config only needs to be updated when setting MCP_Config, MCP_Control
and MCP_CmdCtrl to make these register setting effective. When updating
config in master, master will communicate with slave to update status.
Communication will be failed when masters and slaves are in clock stop
state, and this unnecessary config update makes interrupt setting failed.

Tested on Comet Lake with soundwire enabled

Signed-off-by: Rander Wang <rander.wang at intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
---
 drivers/soundwire/cadence_master.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
index 6ef2f759310d..19b4862e8cce 100644
--- a/drivers/soundwire/cadence_master.c
+++ b/drivers/soundwire/cadence_master.c
@@ -820,7 +820,7 @@ int sdw_cdns_exit_reset(struct sdw_cdns *cdns)
 EXPORT_SYMBOL(sdw_cdns_exit_reset);
 
 /**
- * sdw_cdns_enable_interrupt() - Enable SDW interrupts and update config
+ * sdw_cdns_enable_interrupt() - Enable SDW interrupts
  * @cdns: Cadence instance
  */
 int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state)
@@ -871,8 +871,7 @@ int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state)
 	cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK1, slave_intmask1);
 	cdns_writel(cdns, CDNS_MCP_INTMASK, mask);
 
-	/* commit changes */
-	return cdns_update_config(cdns);
+	return 0;
 }
 EXPORT_SYMBOL(sdw_cdns_enable_interrupt);
 
-- 
2.20.1