1 files changed, 195 insertions, 7 deletions

diff --git a/sound/soc/sof/amd/acp.c b/sound/soc/sof/amd/acp.c
index a2b441e3d6d3..72090c33982d 100644
--- a/sound/soc/sof/amd/acp.c
+++ b/sound/soc/sof/amd/acp.c
@@ -374,10 +374,13 @@ 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) {
@@ -386,7 +389,38 @@ 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)
@@ -442,6 +476,33 @@ 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;
+}
+
+static int acp_dsp_reset(struct snd_sof_dev *sdev)
+{
+	unsigned int val;
+	int ret;
+
+	snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_SOFT_RESET, ACP_DSP_ASSERT_RESET);
+
+	ret = snd_sof_dsp_read_poll_timeout(sdev, ACP_DSP_BAR, ACP_SOFT_RESET, val,
+					    val & ACP_DSP_SOFT_RESET_DONE_MASK,
+					    ACP_REG_POLL_INTERVAL, ACP_REG_POLL_TIMEOUT_US);
+	if (ret < 0) {
+		dev_err(sdev->dev, "timeout asserting reset\n");
+		return ret;
+	}
+
+	snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_SOFT_RESET, ACP_DSP_RELEASE_RESET);
+
+	ret = snd_sof_dsp_read_poll_timeout(sdev, ACP_DSP_BAR, ACP_SOFT_RESET, val, !val,
+					    ACP_REG_POLL_INTERVAL, ACP_REG_POLL_TIMEOUT_US);
+	if (ret < 0)
+		dev_err(sdev->dev, "timeout in releasing reset\n");
+
 	return ret;
 }
 
@@ -461,10 +522,34 @@ static int acp_init(struct snd_sof_dev *sdev)
 	return acp_reset(sdev);
 }
 
+static bool check_acp_sdw_enable_status(struct snd_sof_dev *sdev)
+{
+	struct acp_dev_data *acp_data;
+	u32 sdw0_en, sdw1_en;
+
+	acp_data = sdev->pdata->hw_pdata;
+	if (!acp_data->sdw)
+		return false;
+
+	sdw0_en = snd_sof_dsp_read(sdev, ACP_DSP_BAR, ACP_SW0_EN);
+	sdw1_en = snd_sof_dsp_read(sdev, ACP_DSP_BAR, ACP_SW1_EN);
+	acp_data->sdw_en_stat = sdw0_en || sdw1_en;
+	return acp_data->sdw_en_stat;
+}
+
 int amd_sof_acp_suspend(struct snd_sof_dev *sdev, u32 target_state)
 {
 	int ret;
 
+	/* When acp_reset() function is invoked, it will apply ACP SOFT reset and
+	 * DSP reset. ACP Soft reset sequence will cause all ACP IP registers will
+	 * be reset to default values which will break the ClockStop Mode functionality.
+	 * Add a condition check to apply DSP reset when SoundWire ClockStop mode
+	 * is selected. For the rest of the scenarios, apply acp reset sequence.
+	 */
+	if (check_acp_sdw_enable_status(sdev))
+		return acp_dsp_reset(sdev);
+
 	ret = acp_reset(sdev);
 	if (ret) {
 		dev_err(sdev->dev, "ACP Reset failed\n");
@@ -480,16 +565,97 @@ EXPORT_SYMBOL_NS(amd_sof_acp_suspend, SND_SOC_SOF_AMD_COMMON);
 int amd_sof_acp_resume(struct snd_sof_dev *sdev)
 {
 	int ret;
+	struct acp_dev_data *acp_data;
 
-	ret = acp_init(sdev);
-	if (ret) {
-		dev_err(sdev->dev, "ACP Init failed\n");
-		return ret;
+	acp_data = sdev->pdata->hw_pdata;
+	if (!acp_data->sdw_en_stat) {
+		ret = acp_init(sdev);
+		if (ret) {
+			dev_err(sdev->dev, "ACP Init failed\n");
+			return ret;
+		}
+		return acp_memory_init(sdev);
+	} else {
+		return acp_dsp_reset(sdev);
 	}
-	return acp_memory_init(sdev);
 }
 EXPORT_SYMBOL_NS(amd_sof_acp_resume, SND_SOC_SOF_AMD_COMMON);
 
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_AMD_SOUNDWIRE)
+static int acp_sof_scan_sdw_devices(struct snd_sof_dev *sdev, u64 addr)
+{
+	struct acpi_device *sdw_dev;
+	struct acp_dev_data *acp_data;
+	const struct sof_amd_acp_desc *desc = get_chip_info(sdev->pdata);
+
+	if (!addr)
+		return -ENODEV;
+
+	acp_data = sdev->pdata->hw_pdata;
+	sdw_dev = acpi_find_child_device(ACPI_COMPANION(sdev->dev), addr, 0);
+	if (!sdw_dev)
+		return -ENODEV;
+
+	acp_data->info.handle = sdw_dev->handle;
+	acp_data->info.count = desc->sdw_max_link_count;
+
+	return amd_sdw_scan_controller(&acp_data->info);
+}
+
+static int amd_sof_sdw_probe(struct snd_sof_dev *sdev)
+{
+	struct acp_dev_data *acp_data;
+	struct sdw_amd_res sdw_res;
+	int ret;
+
+	acp_data = sdev->pdata->hw_pdata;
+
+	memset(&sdw_res, 0, sizeof(sdw_res));
+	sdw_res.addr = acp_data->addr;
+	sdw_res.reg_range = acp_data->reg_range;
+	sdw_res.handle = acp_data->info.handle;
+	sdw_res.parent = sdev->dev;
+	sdw_res.dev = sdev->dev;
+	sdw_res.acp_lock = &acp_data->acp_lock;
+	sdw_res.count = acp_data->info.count;
+	sdw_res.link_mask = acp_data->info.link_mask;
+	sdw_res.mmio_base = sdev->bar[ACP_DSP_BAR];
+
+	ret = sdw_amd_probe(&sdw_res, &acp_data->sdw);
+	if (ret)
+		dev_err(sdev->dev, "SoundWire probe failed\n");
+	return ret;
+}
+
+static int amd_sof_sdw_exit(struct snd_sof_dev *sdev)
+{
+	struct acp_dev_data *acp_data;
+
+	acp_data = sdev->pdata->hw_pdata;
+	if (acp_data->sdw)
+		sdw_amd_exit(acp_data->sdw);
+	acp_data->sdw = NULL;
+
+	return 0;
+}
+
+#else
+static int acp_sof_scan_sdw_devices(struct snd_sof_dev *sdev, u64 addr)
+{
+	return 0;
+}
+
+static int amd_sof_sdw_probe(struct snd_sof_dev *sdev)
+{
+	return 0;
+}
+
+static int amd_sof_sdw_exit(struct snd_sof_dev *sdev)
+{
+	return 0;
+}
+#endif
+
 int amd_sof_acp_probe(struct snd_sof_dev *sdev)
 {
 	struct pci_dev *pci = to_pci_dev(sdev->dev);
@@ -525,7 +691,9 @@ int amd_sof_acp_probe(struct snd_sof_dev *sdev)
 	}
 
 	pci_set_master(pci);
-
+	adata->addr = addr;
+	adata->reg_range = chip->reg_end_addr - chip->reg_start_addr;
+	mutex_init(&adata->acp_lock);
 	sdev->pdata->hw_pdata = adata;
 	adata->smn_dev = pci_get_device(PCI_VENDOR_ID_AMD, chip->host_bridge_id, NULL);
 	if (!adata->smn_dev) {
@@ -547,6 +715,21 @@ int amd_sof_acp_probe(struct snd_sof_dev *sdev)
 	if (ret < 0)
 		goto free_ipc_irq;
 
+	/* scan SoundWire capabilities exposed by DSDT */
+	ret = acp_sof_scan_sdw_devices(sdev, chip->sdw_acpi_dev_addr);
+	if (ret < 0) {
+		dev_dbg(sdev->dev, "skipping SoundWire, not detected with ACPI scan\n");
+		goto skip_soundwire;
+	}
+	ret = amd_sof_sdw_probe(sdev);
+	if (ret < 0) {
+		dev_err(sdev->dev, "error: SoundWire probe error\n");
+		free_irq(sdev->ipc_irq, sdev);
+		pci_dev_put(adata->smn_dev);
+		return ret;
+	}
+
+skip_soundwire:
 	sdev->dsp_box.offset = 0;
 	sdev->dsp_box.size = BOX_SIZE_512;
 
@@ -602,6 +785,9 @@ void amd_sof_acp_remove(struct snd_sof_dev *sdev)
 	if (adata->smn_dev)
 		pci_dev_put(adata->smn_dev);
 
+	if (adata->sdw)
+		amd_sof_sdw_exit(sdev);
+
 	if (sdev->ipc_irq)
 		free_irq(sdev->ipc_irq, sdev);
 
@@ -613,4 +799,6 @@ void amd_sof_acp_remove(struct snd_sof_dev *sdev)
 EXPORT_SYMBOL_NS(amd_sof_acp_remove, SND_SOC_SOF_AMD_COMMON);
 
 MODULE_DESCRIPTION("AMD ACP sof driver");
+MODULE_IMPORT_NS(SOUNDWIRE_AMD_INIT);
+MODULE_IMPORT_NS(SND_AMD_SOUNDWIRE_ACPI);
 MODULE_LICENSE("Dual BSD/GPL");