[PATCH V4 4/6] soundwire: amd: set device power state during suspend/resume sequence

[Vijendar Mukunda <Vijendar.Mukunda@amd.com>]

Set SoundWire manager device power state during suspend and resume
sequence for ACP7.0 & ACP7.1 platforms.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
---
 drivers/soundwire/amd_manager.c | 58 ++++++++++++++++++++++++++++++---
 drivers/soundwire/amd_manager.h |  5 +++
 2 files changed, 58 insertions(+), 5 deletions(-)

diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c
index a1ea7b95b4ce..cc87e77f1dd7 100644
--- a/drivers/soundwire/amd_manager.c
+++ b/drivers/soundwire/amd_manager.c
@@ -143,6 +143,29 @@ static void amd_sdw_wake_enable(struct amd_sdw_manager *amd_manager, bool enable
 	writel(wake_ctrl, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11);
 }
 
+static int amd_sdw_set_device_state(struct amd_sdw_manager *amd_manager, u32 target_device_state)
+{
+	u32 sdw_dev_state;
+
+	sdw_dev_state = readl(amd_manager->acp_mmio + AMD_SDW_DEVICE_STATE);
+	switch (amd_manager->instance) {
+	case ACP_SDW0:
+		u32p_replace_bits(&sdw_dev_state, target_device_state,
+				  AMD_SDW0_DEVICE_STATE_MASK);
+		break;
+	case ACP_SDW1:
+		u32p_replace_bits(&sdw_dev_state, target_device_state,
+				  AMD_SDW1_DEVICE_STATE_MASK);
+		break;
+	default:
+		return -EINVAL;
+	}
+	writel(sdw_dev_state, amd_manager->acp_mmio + AMD_SDW_DEVICE_STATE);
+	sdw_dev_state = readl(amd_manager->acp_mmio + AMD_SDW_DEVICE_STATE);
+	dev_dbg(amd_manager->dev, "AMD_SDW_DEVICE_STATE:0x%x\n", sdw_dev_state);
+	return 0;
+}
+
 static void amd_sdw_ctl_word_prep(u32 *lower_word, u32 *upper_word, struct sdw_msg *msg,
 				  int cmd_offset)
 {
@@ -1159,7 +1182,9 @@ static int __maybe_unused amd_suspend(struct device *dev)
 
 	if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) {
 		amd_sdw_wake_enable(amd_manager, false);
-		return amd_sdw_clock_stop(amd_manager);
+		ret = amd_sdw_clock_stop(amd_manager);
+		if (ret)
+			return ret;
 	} else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) {
 		amd_sdw_wake_enable(amd_manager, false);
 		/*
@@ -1169,7 +1194,14 @@ static int __maybe_unused amd_suspend(struct device *dev)
 		ret = amd_sdw_clock_stop(amd_manager);
 		if (ret)
 			return ret;
-		return amd_deinit_sdw_manager(amd_manager);
+		ret = amd_deinit_sdw_manager(amd_manager);
+		if (ret)
+			return ret;
+	}
+	if (amd_manager->acp_rev >= ACP70_PCI_REV_ID) {
+		ret = amd_sdw_set_device_state(amd_manager, AMD_SDW_DEVICE_STATE_D3);
+		if (ret)
+			return ret;
 	}
 	return 0;
 }
@@ -1187,13 +1219,22 @@ static int __maybe_unused amd_suspend_runtime(struct device *dev)
 	}
 	if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) {
 		amd_sdw_wake_enable(amd_manager, true);
-		return amd_sdw_clock_stop(amd_manager);
+		ret = amd_sdw_clock_stop(amd_manager);
+		if (ret)
+			return ret;
 	} else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) {
 		amd_sdw_wake_enable(amd_manager, true);
 		ret = amd_sdw_clock_stop(amd_manager);
 		if (ret)
 			return ret;
-		return amd_deinit_sdw_manager(amd_manager);
+		ret = amd_deinit_sdw_manager(amd_manager);
+		if (ret)
+			return ret;
+	}
+	if (amd_manager->acp_rev >= ACP70_PCI_REV_ID) {
+		ret = amd_sdw_set_device_state(amd_manager, AMD_SDW_DEVICE_STATE_D3);
+		if (ret)
+			return ret;
 	}
 	return 0;
 }
@@ -1212,7 +1253,9 @@ static int __maybe_unused amd_resume_runtime(struct device *dev)
 	}
 
 	if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) {
-		return amd_sdw_clock_stop_exit(amd_manager);
+		ret = amd_sdw_clock_stop_exit(amd_manager);
+		if (ret)
+			return ret;
 	} else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) {
 		writel(0x00, amd_manager->acp_mmio + ACP_SW_WAKE_EN(amd_manager->instance));
 		val = readl(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL);
@@ -1235,6 +1278,11 @@ static int __maybe_unused amd_resume_runtime(struct device *dev)
 			return ret;
 		amd_sdw_set_frameshape(amd_manager);
 	}
+	if (amd_manager->acp_rev >= ACP70_PCI_REV_ID) {
+		ret = amd_sdw_set_device_state(amd_manager, AMD_SDW_DEVICE_STATE_D0);
+		if (ret)
+			return ret;
+	}
 	return 0;
 }
 
diff --git a/drivers/soundwire/amd_manager.h b/drivers/soundwire/amd_manager.h
index 30244a31c21c..8430f279d88e 100644
--- a/drivers/soundwire/amd_manager.h
+++ b/drivers/soundwire/amd_manager.h
@@ -194,6 +194,11 @@
 #define AMD_SDW_CLK_RESUME_DONE				3
 #define AMD_SDW_WAKE_STAT_MASK				BIT(16)
 #define AMD_SDW_WAKE_INTR_MASK				BIT(16)
+#define AMD_SDW_DEVICE_STATE				0x1430
+#define AMD_SDW0_DEVICE_STATE_MASK			GENMASK(1, 0)
+#define AMD_SDW1_DEVICE_STATE_MASK			GENMASK(3, 2)
+#define AMD_SDW_DEVICE_STATE_D0				0
+#define AMD_SDW_DEVICE_STATE_D3				3
 
 static u32 amd_sdw_freq_tbl[AMD_SDW_MAX_FREQ_NUM] = {
 	AMD_SDW_DEFAULT_CLK_FREQ,
-- 
2.34.1