From: Rander Wang <rander.wang@xxxxxxxxx>
make sure all interrupts status are cleared before enabling interrupt
so that there is no unexpected interrupt triggered.
Signed-off-by: Rander Wang <rander.wang@xxxxxxxxx>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
---
drivers/soundwire/cadence_master.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
index a0ec21b64d42..847b8f5f0a32 100644
--- a/drivers/soundwire/cadence_master.c
+++ b/drivers/soundwire/cadence_master.c
@@ -856,6 +856,16 @@ int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns, bool state)
mask = interrupt_mask;
update_masks:
+ /* clear slave interrupt status before enabling interrupt */
+ if (state) {
+ u32 slave_state;
+
+ slave_state = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT0);
+ cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT0, slave_state);
+ slave_state = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT1);
+ cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT1, slave_state);
+ }
+
cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK0, slave_intmask0);
cdns_writel(cdns, CDNS_MCP_SLAVE_INTMASK1, slave_intmask1);
cdns_writel(cdns, CDNS_MCP_INTMASK, mask);
--
2.20.1
_______________________________________________
Alsa-devel mailing list
Alsa-devel@xxxxxxxxxxxxxxxx
https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
