[PATCH V3 17/25] ASoC: amd: ps: add soundwire wake interrupt handling

[Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>]

Add SoundWire wake interrupt handling for ACP7.0 & ACP7.1 platforms.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>
---
 sound/soc/amd/ps/acp63.h  |  8 +++++
 sound/soc/amd/ps/pci-ps.c | 62 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+)

diff --git a/sound/soc/amd/ps/acp63.h b/sound/soc/amd/ps/acp63.h
index 48dac2a044c2..9940151b0675 100644
--- a/sound/soc/amd/ps/acp63.h
+++ b/sound/soc/amd/ps/acp63.h
@@ -139,6 +139,10 @@
 #define ACP70_PGFSM_STATUS_MASK			0xFF
 #define ACP70_TIMEOUT				2000
 #define ACP70_SDW_HOST_WAKE_MASK	0x0C00000
+#define ACP70_SDW0_HOST_WAKE_STAT	BIT(24)
+#define ACP70_SDW1_HOST_WAKE_STAT	BIT(25)
+#define ACP70_SDW0_PME_STAT		BIT(26)
+#define ACP70_SDW1_PME_STAT		BIT(27)
 
 #define ACP70_SDW0_DMA_MAX_STREAMS	6
 #define ACP70_SDW1_DMA_MAX_STREAMS	ACP70_SDW0_DMA_MAX_STREAMS
@@ -325,6 +329,8 @@ struct acp_hw_ops {
  * @is_pdm_config: flat set to true when PDM configuration is selected from BIOS
  * @is_sdw_config: flag set to true when SDW configuration is selected from BIOS
  * @sdw_en_stat: flag set to true when any one of the SoundWire manager instance is enabled
+ * @acp70_sdw0_wake_event: flag set to true when wake irq asserted for SW0 instance
+ * @acp70_sdw1_wake_event: flag set to true when wake irq asserted for SW1 instance
  * @addr: pci ioremap address
  * @reg_range: ACP reigister range
  * @acp_rev: ACP PCI revision id
@@ -356,6 +362,8 @@ struct acp63_dev_data {
 	bool is_pdm_config;
 	bool is_sdw_config;
 	bool sdw_en_stat;
+	bool acp70_sdw0_wake_event;
+	bool acp70_sdw1_wake_event;
 	u32 addr;
 	u32 reg_range;
 	u32 acp_rev;
diff --git a/sound/soc/amd/ps/pci-ps.c b/sound/soc/amd/ps/pci-ps.c
index a9e140ca1296..6a725cf36345 100644
--- a/sound/soc/amd/ps/pci-ps.c
+++ b/sound/soc/amd/ps/pci-ps.c
@@ -21,6 +21,65 @@
 
 #include "acp63.h"
 
+static void handle_acp70_sdw_wake_event(struct acp63_dev_data *adata)
+{
+	struct amd_sdw_manager *amd_manager;
+
+	if (adata->acp70_sdw0_wake_event) {
+		amd_manager = dev_get_drvdata(&adata->sdw->pdev[0]->dev);
+		if (amd_manager)
+			pm_request_resume(amd_manager->dev);
+		adata->acp70_sdw0_wake_event = 0;
+	}
+
+	if (adata->acp70_sdw1_wake_event) {
+		amd_manager = dev_get_drvdata(&adata->sdw->pdev[1]->dev);
+		if (amd_manager)
+			pm_request_resume(amd_manager->dev);
+		adata->acp70_sdw1_wake_event = 0;
+	}
+}
+
+static short int check_and_handle_acp70_sdw_wake_irq(struct acp63_dev_data *adata)
+{
+	u32 ext_intr_stat1;
+	int irq_flag = 0;
+	bool sdw_wake_irq = false;
+
+	ext_intr_stat1 = readl(adata->acp63_base + ACP_EXTERNAL_INTR_STAT1);
+	if (ext_intr_stat1 & ACP70_SDW0_HOST_WAKE_STAT) {
+		writel(ACP70_SDW0_HOST_WAKE_STAT, adata->acp63_base + ACP_EXTERNAL_INTR_STAT1);
+		adata->acp70_sdw0_wake_event = true;
+		sdw_wake_irq = true;
+	}
+
+	if (ext_intr_stat1 & ACP70_SDW1_HOST_WAKE_STAT) {
+		writel(ACP70_SDW1_HOST_WAKE_STAT, adata->acp63_base + ACP_EXTERNAL_INTR_STAT1);
+		adata->acp70_sdw1_wake_event = true;
+		sdw_wake_irq = true;
+	}
+
+	if (ext_intr_stat1 & ACP70_SDW0_PME_STAT) {
+		writel(0, adata->acp63_base + ACP_SW0_WAKE_EN);
+		writel(ACP70_SDW0_PME_STAT, adata->acp63_base + ACP_EXTERNAL_INTR_STAT1);
+		adata->acp70_sdw0_wake_event = true;
+		sdw_wake_irq = true;
+	}
+
+	if (ext_intr_stat1 & ACP70_SDW1_PME_STAT) {
+		writel(0, adata->acp63_base + ACP_SW1_WAKE_EN);
+		writel(ACP70_SDW1_PME_STAT, adata->acp63_base + ACP_EXTERNAL_INTR_STAT1);
+		adata->acp70_sdw1_wake_event = true;
+		sdw_wake_irq = true;
+	}
+
+	if (sdw_wake_irq) {
+		handle_acp70_sdw_wake_event(adata);
+		irq_flag = 1;
+	}
+	return irq_flag;
+}
+
 static short int check_and_handle_sdw_dma_irq(struct acp63_dev_data *adata, u32 ext_intr_stat,
 					      u32 ext_intr_stat1)
 {
@@ -163,6 +222,9 @@ static irqreturn_t acp63_irq_handler(int irq, void *dev_id)
 		irq_flag = 1;
 	}
 
+	if (adata->acp_rev >= ACP70_PCI_REV)
+		irq_flag = check_and_handle_acp70_sdw_wake_irq(adata);
+
 	if (ext_intr_stat & BIT(PDM_DMA_STAT)) {
 		ps_pdm_data = dev_get_drvdata(&adata->pdm_dev->dev);
 		writel(BIT(PDM_DMA_STAT), adata->acp63_base + ACP_EXTERNAL_INTR_STAT);
-- 
2.34.1