[PATCH V4 5/6] soundwire: amd: set ACP_PME_EN during runtime suspend sequence

[Vijendar Mukunda]

Set ACP_PME_EN to 1 during runtime suspend sequence as per design flow
for ACP7.0 & ACP7.1 platforms.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>
---
 drivers/soundwire/amd_manager.c | 9 +++++++++
 drivers/soundwire/amd_manager.h | 1 +
 2 files changed, 10 insertions(+)

diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c
index cc87e77f1dd7..d38b4baee221 100644
--- a/drivers/soundwire/amd_manager.c
+++ b/drivers/soundwire/amd_manager.c
@@ -1211,6 +1211,7 @@ static int __maybe_unused amd_suspend_runtime(struct device *dev)
 	struct amd_sdw_manager *amd_manager = dev_get_drvdata(dev);
 	struct sdw_bus *bus = &amd_manager->bus;
 	int ret;
+	u32 val;
 
 	if (bus->prop.hw_disabled) {
 		dev_dbg(bus->dev, "SoundWire manager %d is disabled,\n",
@@ -1235,6 +1236,14 @@ static int __maybe_unused amd_suspend_runtime(struct device *dev)
 		ret = amd_sdw_set_device_state(amd_manager, AMD_SDW_DEVICE_STATE_D3);
 		if (ret)
 			return ret;
+		if (amd_manager->wake_en_mask) {
+			val = readl(amd_manager->acp_mmio + ACP_PME_EN);
+			if (!val) {
+				writel(1, amd_manager->acp_mmio + ACP_PME_EN);
+				val = readl(amd_manager->acp_mmio + ACP_PME_EN);
+				dev_dbg(amd_manager->dev, "ACP_PME_EN:0x%x\n", val);
+			}
+		}
 	}
 	return 0;
 }
diff --git a/drivers/soundwire/amd_manager.h b/drivers/soundwire/amd_manager.h
index 8430f279d88e..1d5e94371f81 100644
--- a/drivers/soundwire/amd_manager.h
+++ b/drivers/soundwire/amd_manager.h
@@ -199,6 +199,7 @@
 #define AMD_SDW1_DEVICE_STATE_MASK			GENMASK(3, 2)
 #define AMD_SDW_DEVICE_STATE_D0				0
 #define AMD_SDW_DEVICE_STATE_D3				3
+#define ACP_PME_EN					0x0001400
 
 static u32 amd_sdw_freq_tbl[AMD_SDW_MAX_FREQ_NUM] = {
 	AMD_SDW_DEFAULT_CLK_FREQ,
-- 
2.34.1