[PATCH V3 10/10] soundwire: amd: fix IRQ thread dropping STATUS_0TO7 on simultaneous wake

[Vijendar Mukunda]

When the wake bit and a device-state change arrive at the same time,
the IRQ thread returned early after handling wake, silently discarding
STATUS_0TO7. If the manager is already at D0, pm_request_resume() is
a no-op so the dropped ATTACHED event is never recovered and jack
detection stops working.

Remove the early return on wake: call amd_sdw_process_wake_event(),
strip the wake bit from the local STATUS_8TO11 copy, and continue to
the normal slave-status processing path. Remove the STATUS_8TO11 clear
from amd_sdw_process_wake_event() so the single tail clear in
amd_sdw_irq_thread() is the only write to the register per invocation,
eliminating the double-clear race where a new event arriving between
two successive clears would be wiped before being read.

Fixes: 66c878838f37 ("soundwire: amd: handle SoundWire wake enable interrupt")
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>
---
 drivers/soundwire/amd_manager.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c
index 1a252a81269a..beb982b17fa9 100644
--- a/drivers/soundwire/amd_manager.c
+++ b/drivers/soundwire/amd_manager.c
@@ -1006,7 +1006,6 @@ static void amd_sdw_process_wake_event(struct amd_sdw_manager *amd_manager)
 	dev_dbg(amd_manager->dev, "SoundWire Wake event reported\n");
 	pm_request_resume(amd_manager->dev);
 	writel(0x00, amd_manager->acp_mmio + ACP_SW_WAKE_EN(amd_manager->instance));
-	writel(0x00, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_8TO11);
 }
 
 static void amd_sdw_irq_thread(struct work_struct *work)
@@ -1023,8 +1022,11 @@ static void amd_sdw_irq_thread(struct work_struct *work)
 
 	dev_dbg(amd_manager->dev, "[SDW%d] SDW INT: 0to7=0x%x, 8to11=0x%x\n",
 		amd_manager->instance, status_change_0to7, status_change_8to11);
-	if (status_change_8to11 & AMD_SDW_WAKE_STAT_MASK)
-		return amd_sdw_process_wake_event(amd_manager);
+
+	if (status_change_8to11 & AMD_SDW_WAKE_STAT_MASK) {
+		amd_sdw_process_wake_event(amd_manager);
+		status_change_8to11 &= ~AMD_SDW_WAKE_STAT_MASK;
+	}
 
 	if (status_change_8to11 & AMD_SDW_PREQ_INTR_STAT) {
 		amd_sdw_read_and_process_ping_status(amd_manager);
-- 
2.48.1