[PATCH V6 7/8] soundwire: amd: handle SoundWire wake enable interrupt

[Vijendar Mukunda]

Add wake enable interrupt support for both the SoundWire manager
instances.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>
Signed-off-by: Mastan Katragadda <Mastan.Katragadda@xxxxxxx>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/lkml/20230227154801.50319-8-Vijendar.Mukunda@xxxxxxx
---
 drivers/soundwire/amd_manager.c | 10 ++++++++++
 drivers/soundwire/amd_manager.h |  1 +
 2 files changed, 11 insertions(+)

diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c
index c3c0bee57bd1..70e4fcd7e1e0 100644
--- a/drivers/soundwire/amd_manager.c
+++ b/drivers/soundwire/amd_manager.c
@@ -869,6 +869,13 @@ static void amd_sdw_update_slave_status(u32 status_change_0to7, u32 status_chang
 	}
 }
 
+static void amd_sdw_process_wake_event(struct amd_sdw_manager *amd_manager)
+{
+	pm_request_resume(amd_manager->dev);
+	acp_reg_writel(0x00, amd_manager->acp_mmio + ACP_SW_WAKE_EN(amd_manager->instance));
+	acp_reg_writel(0x00, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_8TO11);
+}
+
 static void amd_sdw_irq_thread(struct work_struct *work)
 {
 	struct amd_sdw_manager *amd_manager =
@@ -880,6 +887,9 @@ static void amd_sdw_irq_thread(struct work_struct *work)
 	status_change_0to7 = acp_reg_readl(amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_0TO7);
 	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_PREQ_INTR_STAT) {
 		amd_sdw_read_and_process_ping_status(amd_manager);
 	} else {
diff --git a/drivers/soundwire/amd_manager.h b/drivers/soundwire/amd_manager.h
index 65bc79d8f7c9..cc1a14731fd4 100644
--- a/drivers/soundwire/amd_manager.h
+++ b/drivers/soundwire/amd_manager.h
@@ -189,6 +189,7 @@
 #define AMD_SDW_CLK_STOP_DONE				1
 #define AMD_SDW_CLK_RESUME_REQ				2
 #define AMD_SDW_CLK_RESUME_DONE				3
+#define AMD_SDW_WAKE_STAT_MASK				BIT(16)
 
 enum amd_sdw_cmd_type {
 	AMD_SDW_CMD_PING = 0,
-- 
2.34.1