ASoC: SOF: Fixes for suspend after firmware crash

Merge series from Peter Ujfalusi <peter.ujfalusi@linux.intel.com>:

This series contails 2 patches to fix device suspend after a firmware
crash and another patch to allow reading the FW state from debugfs.

sound/soc/sof/debug.c

@@ -353,7 +353,9 @@ int snd_sof_dbg_init(struct snd_sof_dev *sdev)
 			return err;
 	}
 
-	return 0;
+	return snd_sof_debugfs_buf_item(sdev, &sdev->fw_state,
+					sizeof(sdev->fw_state),
+					"fw_state", 0444);
 }
 EXPORT_SYMBOL_GPL(snd_sof_dbg_init);
 

sound/soc/sof/pm.c

@@ -182,7 +182,7 @@ static int sof_suspend(struct device *dev, bool runtime_suspend)
 	const struct sof_ipc_pm_ops *pm_ops = sdev->ipc->ops->pm;
 	const struct sof_ipc_tplg_ops *tplg_ops = sdev->ipc->ops->tplg;
 	pm_message_t pm_state;
-	u32 target_state = 0;
+	u32 target_state = snd_sof_dsp_power_target(sdev);
 	int ret;
 
 	/* do nothing if dsp suspend callback is not set */
@@ -192,6 +192,9 @@ static int sof_suspend(struct device *dev, bool runtime_suspend)
 	if (runtime_suspend && !sof_ops(sdev)->runtime_suspend)
 		return 0;
 
+	if (tplg_ops && tplg_ops->tear_down_all_pipelines)
+		tplg_ops->tear_down_all_pipelines(sdev, false);
+
 	if (sdev->fw_state != SOF_FW_BOOT_COMPLETE)
 		goto suspend;
 
@@ -206,7 +209,6 @@ static int sof_suspend(struct device *dev, bool runtime_suspend)
 		}
 	}
 
-	target_state = snd_sof_dsp_power_target(sdev);
 	pm_state.event = target_state;
 
 	/* Skip to platform-specific suspend if DSP is entering D0 */
@@ -217,9 +219,6 @@ static int sof_suspend(struct device *dev, bool runtime_suspend)
 		goto suspend;
 	}
 
-	if (tplg_ops->tear_down_all_pipelines)
-		tplg_ops->tear_down_all_pipelines(sdev, false);
-
 	/* suspend DMA trace */
 	sof_fw_trace_suspend(sdev, pm_state);