ASoC: amd: ps: add mutex lock for accessing common registers

Add mutex lock for accessing ACP common registers across different
modules.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20230104055435.321327-1-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/amd/ps/acp63.h

@@ -106,6 +106,7 @@ struct acp63_dev_data {
 	struct resource *res;
 	bool acp63_audio_mode;
 	struct platform_device *pdev[ACP63_DEVS];
+	struct mutex acp_lock; /* protect shared registers */
 	u16 pdev_mask;
 	u16 pdev_count;
 	u16 pdm_dev_index;

sound/soc/amd/ps/pci-ps.c

@@ -209,7 +209,8 @@ static int create_acp63_platform_devs(struct pci_dev *pci, struct acp63_dev_data
 	case ACP63_PDM_DEV_MASK:
 		adata->pdm_dev_index  = 0;
 		acp63_fill_platform_dev_info(&pdevinfo[0], parent, NULL, "acp_ps_pdm_dma",
-					     0, adata->res, 1, NULL, 0);
+					     0, adata->res, 1, &adata->acp_lock,
+					     sizeof(adata->acp_lock));
 		acp63_fill_platform_dev_info(&pdevinfo[1], parent, NULL, "dmic-codec",
 					     0, NULL, 0, NULL, 0);
 		acp63_fill_platform_dev_info(&pdevinfo[2], parent, NULL, "acp_ps_mach",
@@ -283,6 +284,7 @@ static int snd_acp63_probe(struct pci_dev *pci,
 	}
 	pci_set_master(pci);
 	pci_set_drvdata(pci, adata);
+	mutex_init(&adata->acp_lock);
 	ret = acp63_init(adata->acp63_base, &pci->dev);
 	if (ret)
 		goto release_regions;