ASoC: SOF: amd: add interrupt handling for SoundWire manager devices

Add support for interrupt handling for soundwire manager platform
devices.
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://msgid.link/r/20240129055147.1493853-9-Vijendar.Mukunda@amd.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/amd/acp-dsp-offset.h

@@ -78,6 +78,10 @@
 #define ACP5X_AXI2DAGB_SEM_0			0x1884
 #define ACP6X_AXI2DAGB_SEM_0			0x1874
 
+/* ACP common registers to report errors related to I2S & SoundWire interfaces */
+#define ACP_SW0_I2S_ERROR_REASON		0x18B4
+#define ACP_SW1_I2S_ERROR_REASON		0x1A50
+
 /* Registers from ACP_SHA block */
 #define ACP_SHA_DSP_FW_QUALIFIER		0x1C70
 #define ACP_SHA_DMA_CMD				0x1CB0

sound/soc/sof/amd/acp.c

@@ -375,10 +375,13 @@ static irqreturn_t acp_irq_thread(int irq, void *context)
 
 static irqreturn_t acp_irq_handler(int irq, void *dev_id)
 {
+	struct amd_sdw_manager *amd_manager;
 	struct snd_sof_dev *sdev = dev_id;
 	const struct sof_amd_acp_desc *desc = get_chip_info(sdev->pdata);
+	struct acp_dev_data *adata = sdev->pdata->hw_pdata;
 	unsigned int base = desc->dsp_intr_base;
 	unsigned int val;
+	int irq_flag = 0;
 
 	val = snd_sof_dsp_read(sdev, ACP_DSP_BAR, base + DSP_SW_INTR_STAT_OFFSET);
 	if (val & ACP_DSP_TO_HOST_IRQ) {
@@ -387,7 +390,38 @@ static irqreturn_t acp_irq_handler(int irq, void *dev_id)
 		return IRQ_WAKE_THREAD;
 	}
 
-	return IRQ_NONE;
+	val = snd_sof_dsp_read(sdev, ACP_DSP_BAR, desc->ext_intr_stat);
+	if (val & ACP_SDW0_IRQ_MASK) {
+		amd_manager = dev_get_drvdata(&adata->sdw->pdev[0]->dev);
+		snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->ext_intr_stat, ACP_SDW0_IRQ_MASK);
+		if (amd_manager)
+			schedule_work(&amd_manager->amd_sdw_irq_thread);
+		irq_flag = 1;
+	}
+
+	if (val & ACP_ERROR_IRQ_MASK) {
+		snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->ext_intr_stat, ACP_ERROR_IRQ_MASK);
+		snd_sof_dsp_write(sdev, ACP_DSP_BAR, base + ACP_SW0_I2S_ERROR_REASON, 0);
+		snd_sof_dsp_write(sdev, ACP_DSP_BAR, base + ACP_SW1_I2S_ERROR_REASON, 0);
+		snd_sof_dsp_write(sdev, ACP_DSP_BAR, base + ACP_ERROR_STATUS, 0);
+		irq_flag = 1;
+	}
+
+	if (desc->ext_intr_stat1) {
+		val = snd_sof_dsp_read(sdev, ACP_DSP_BAR, desc->ext_intr_stat1);
+		if (val & ACP_SDW1_IRQ_MASK) {
+			amd_manager = dev_get_drvdata(&adata->sdw->pdev[1]->dev);
+			snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->ext_intr_stat1,
+					  ACP_SDW1_IRQ_MASK);
+			if (amd_manager)
+				schedule_work(&amd_manager->amd_sdw_irq_thread);
+			irq_flag = 1;
+		}
+	}
+	if (irq_flag)
+		return IRQ_HANDLED;
+	else
+		return IRQ_NONE;
 }
 
 static int acp_power_on(struct snd_sof_dev *sdev)
@@ -443,6 +477,8 @@ static int acp_reset(struct snd_sof_dev *sdev)
 	if (desc->ext_intr_enb)
 		snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->ext_intr_enb, 0x01);
 
+	if (desc->ext_intr_cntl)
+		snd_sof_dsp_write(sdev, ACP_DSP_BAR, desc->ext_intr_cntl, ACP_ERROR_IRQ_MASK);
 	return ret;
 }
 

sound/soc/sof/amd/acp.h

@@ -93,6 +93,9 @@
 #define PROBE_STATUS_BIT			BIT(31)
 
 #define ACP_FIRMWARE_SIGNATURE			0x100
+#define ACP_ERROR_IRQ_MASK			BIT(29)
+#define ACP_SDW0_IRQ_MASK			BIT(21)
+#define ACP_SDW1_IRQ_MASK			BIT(2)
 #define ACP_DEFAULT_SRAM_LENGTH			0x00080000
 #define ACP_SRAM_PAGE_COUNT			128
 
@@ -184,7 +187,9 @@ struct sof_amd_acp_desc {
 	unsigned int host_bridge_id;
 	u32 pgfsm_base;
 	u32 ext_intr_enb;
+	u32 ext_intr_cntl;
 	u32 ext_intr_stat;
+	u32 ext_intr_stat1;
 	u32 dsp_intr_base;
 	u32 sram_pte_offset;
 	u32 hw_semaphore_offset;