ASoC: SOF: amd: add system and runtime PM ops for ACP7x

Add amd_sof_acp7x_suspend() and amd_sof_acp7x_resume() for ACP7.B/7.F
platforms power management.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>

Author: vijendarmukunda

sound/soc/sof/amd/acp.c

@@ -1150,6 +1150,77 @@ void amd_sof_acp7x_remove(struct snd_sof_dev *sdev)
 }
 EXPORT_SYMBOL_NS(amd_sof_acp7x_remove, "SND_SOC_SOF_AMD_COMMON");
 
+int amd_sof_acp7x_suspend(struct snd_sof_dev *sdev, u32 target_state)
+{
+	struct acp_dev_data *acp_data;
+	int ret;
+	bool enable = false;
+
+	acp_data = sdev->pdata->hw_pdata;
+
+	ret = acp_reset(sdev);
+	if (ret) {
+		dev_err(sdev->dev, "ACP Reset failed\n");
+		return ret;
+	}
+	switch (acp_data->pci_rev) {
+	case ACP7B_PCI_ID:
+	case ACP7F_PCI_ID:
+		enable = true;
+		break;
+	default:
+		break;
+	}
+	snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP_CONTROL, enable);
+	snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP7X_ZSC_DSP_CTRL, 1);
+
+	return 0;
+}
+EXPORT_SYMBOL_NS(amd_sof_acp7x_suspend, "SND_SOC_SOF_AMD_COMMON");
+
+int amd_sof_acp7x_resume(struct snd_sof_dev *sdev)
+{
+	struct acp_dev_data *acp_data;
+	int ret;
+
+	acp_data = sdev->pdata->hw_pdata;
+
+	ret = acp_init(sdev);
+	if (ret) {
+		dev_err(sdev->dev, "ACP Init failed\n");
+		return ret;
+	}
+	ret = acp_memory_init(sdev);
+	if (ret) {
+		dev_err(sdev->dev, "ACP Memory init failed\n");
+		return ret;
+	}
+
+	switch (acp_data->pci_rev) {
+	case ACP7B_PCI_ID:
+	case ACP7F_PCI_ID:
+		snd_sof_dsp_write(sdev, ACP_DSP_BAR, ACP7X_PME_EN, 1);
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_NS(amd_sof_acp7x_resume, "SND_SOC_SOF_AMD_COMMON");
+
+int amd_sof_acp7x_suspend_runtime(struct snd_sof_dev *sdev)
+{
+	return amd_sof_acp7x_suspend(sdev, 0);
+}
+EXPORT_SYMBOL_NS(amd_sof_acp7x_suspend_runtime, "SND_SOC_SOF_AMD_COMMON");
+
+int amd_sof_acp7x_resume_runtime(struct snd_sof_dev *sdev)
+{
+	return amd_sof_acp7x_resume(sdev);
+}
+EXPORT_SYMBOL_NS(amd_sof_acp7x_resume_runtime, "SND_SOC_SOF_AMD_COMMON");
+
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_DESCRIPTION("AMD ACP sof driver");
 MODULE_IMPORT_NS("SOUNDWIRE_AMD_INIT");

sound/soc/sof/amd/acp.h

@@ -357,6 +357,10 @@ int sof_acp7x_ops_init(struct snd_sof_dev *sdev);
 
 int amd_sof_acp7x_probe(struct snd_sof_dev *sdev);
 void amd_sof_acp7x_remove(struct snd_sof_dev *sdev);
+int amd_sof_acp7x_suspend(struct snd_sof_dev *sdev, u32 target_state);
+int amd_sof_acp7x_resume(struct snd_sof_dev *sdev);
+int amd_sof_acp7x_suspend_runtime(struct snd_sof_dev *sdev);
+int amd_sof_acp7x_resume_runtime(struct snd_sof_dev *sdev);
 
 struct snd_soc_acpi_mach *amd_sof_machine_select(struct snd_sof_dev *sdev);
 /* Machine configuration */

sound/soc/sof/amd/acp7x.c

@@ -176,5 +176,10 @@ int sof_acp7x_ops_init(struct snd_sof_dev *sdev)
 	if (acp_sof_post_fw_run_delay)
 		sof_acp7x_ops.post_fw_run = sof_acp7x_post_fw_run_delay;
 
+	sof_acp7x_ops.suspend = amd_sof_acp7x_suspend;
+	sof_acp7x_ops.resume = amd_sof_acp7x_resume;
+	sof_acp7x_ops.runtime_suspend = amd_sof_acp7x_suspend_runtime;
+	sof_acp7x_ops.runtime_resume = amd_sof_acp7x_resume_runtime;
+
 	return 0;
 }