ASoC: SOF: amd: add code for invoking soundwire manager helper functions

Add code for invoking Soundwire manager helper functions
when SoundWire configuration is selected.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://msgid.link/r/20240129055147.1493853-8-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/amd/Kconfig

@@ -60,6 +60,23 @@ config SND_SOC_SOF_ACP_PROBES
 	  This option is not user-selectable but automatically handled by
 	  'select' statements at a higher level
 
+config SND_SOC_SOF_AMD_SOUNDWIRE_LINK_BASELINE
+	tristate
+	select SOUNDWIRE_AMD if SND_SOC_SOF_AMD_SOUNDWIRE != n
+	select SND_AMD_SOUNDWIRE_ACPI if ACPI
+
+config SND_SOC_SOF_AMD_SOUNDWIRE
+	tristate "SOF support for SoundWire based AMD platforms"
+	default SND_SOC_SOF_AMD_SOUNDWIRE_LINK_BASELINE
+	depends on SND_SOC_SOF_AMD_SOUNDWIRE_LINK_BASELINE
+	depends on ACPI && SOUNDWIRE
+	depends on !(SOUNDWIRE=m && SND_SOC_SOF_AMD_SOUNDWIRE_LINK_BASELINE=y)
+	help
+	  This adds support for SoundWire with Sound Open Firmware
+	  for AMD platforms.
+	  Say Y if you want to enable SoundWire links with SOF.
+	  If unsure select "N".
+
 config SND_SOC_SOF_AMD_ACP63
 	tristate "SOF support for ACP6.3 platform"
 	depends on SND_SOC_SOF_PCI

sound/soc/sof/amd/acp.c

@@ -491,6 +491,81 @@ int amd_sof_acp_resume(struct snd_sof_dev *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);
@@ -527,7 +602,9 @@ 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) {
@@ -549,6 +626,21 @@ 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;
 
@@ -596,6 +688,9 @@ 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);
 
@@ -607,4 +702,6 @@ 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");

sound/soc/sof/amd/acp.h

@@ -12,7 +12,7 @@
 #define __SOF_AMD_ACP_H
 
 #include <linux/dmi.h>
-
+#include <linux/soundwire/sdw_amd.h>
 #include "../sof-priv.h"
 #include "../sof-audio.h"
 
@@ -191,6 +191,10 @@ struct sof_amd_acp_desc {
 	u32 acp_clkmux_sel;
 	u32 fusion_dsp_offset;
 	u32 probe_reg_offset;
+	u32 reg_start_addr;
+	u32 reg_end_addr;
+	u32 sdw_max_link_count;
+	u64 sdw_acpi_dev_addr;
 };
 
 /* Common device data struct for ACP devices */
@@ -199,6 +203,12 @@ struct acp_dev_data {
 	const struct firmware *fw_dbin;
 	/* DMIC device */
 	struct platform_device *dmic_dev;
+	/* mutex lock to protect ACP common registers access */
+	struct mutex acp_lock;
+	/* ACPI information stored between scan and probe steps */
+	struct sdw_amd_acpi_info info;
+	/* sdw context allocated by SoundWire driver */
+	struct sdw_amd_ctx *sdw;
 	unsigned int fw_bin_size;
 	unsigned int fw_data_bin_size;
 	unsigned int fw_sram_data_bin_size;
@@ -207,6 +217,9 @@ struct acp_dev_data {
 	const char *fw_sram_data_bin;
 	u32 fw_bin_page_count;
 	u32 fw_data_bin_page_count;
+	u32 addr;
+	u32 reg_range;
+	u32 blk_type;
 	dma_addr_t sha_dma_addr;
 	u8 *bin_buf;
 	dma_addr_t dma_addr;