ASoC: SOF: trace: send DMA_TRACE_FREE IPC during release

Send the DMA_TRACE_FREE IPC during release to stop and free the trace
DMA in the DSP.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20211102101019.14037-4-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/core.c

@@ -363,6 +363,7 @@ int snd_sof_device_remove(struct device *dev)
 		cancel_work_sync(&sdev->probe_work);
 
 	if (sdev->fw_state > SOF_FW_BOOT_NOT_STARTED) {
+		snd_sof_free_trace(sdev);
 		ret = snd_sof_dsp_power_down_notify(sdev);
 		if (ret < 0)
 			dev_warn(dev, "error: %d failed to prepare DSP for device removal",
@@ -370,7 +371,6 @@ int snd_sof_device_remove(struct device *dev)
 
 		snd_sof_ipc_free(sdev);
 		snd_sof_free_debug(sdev);
-		snd_sof_free_trace(sdev);
 	}
 
 	/*

sound/soc/sof/trace.c

@@ -539,6 +539,10 @@ EXPORT_SYMBOL(snd_sof_trace_notify_for_error);
 
 void snd_sof_release_trace(struct snd_sof_dev *sdev)
 {
+	struct sof_ipc_fw_ready *ready = &sdev->fw_ready;
+	struct sof_ipc_fw_version *v = &ready->version;
+	struct sof_ipc_cmd_hdr hdr;
+	struct sof_ipc_reply ipc_reply;
 	int ret;
 
 	if (!sdev->dtrace_is_supported || !sdev->dtrace_is_enabled)
@@ -549,6 +553,20 @@ void snd_sof_release_trace(struct snd_sof_dev *sdev)
 		dev_err(sdev->dev,
 			"error: snd_sof_dma_trace_trigger: stop: %d\n", ret);
 
+	/*
+	 * stop and free trace DMA in the DSP. TRACE_DMA_FREE is only supported from
+	 * ABI 3.20.0 onwards
+	 */
+	if (v->abi_version >= SOF_ABI_VER(3, 20, 0)) {
+		hdr.size = sizeof(hdr);
+		hdr.cmd = SOF_IPC_GLB_TRACE_MSG | SOF_IPC_TRACE_DMA_FREE;
+
+		ret = sof_ipc_tx_message(sdev->ipc, hdr.cmd, &hdr, hdr.size,
+					 &ipc_reply, sizeof(ipc_reply));
+		if (ret < 0)
+			dev_err(sdev->dev, "DMA_TRACE_FREE failed with error: %d\n", ret);
+	}
+
 	ret = snd_sof_dma_trace_release(sdev);
 	if (ret < 0)
 		dev_err(sdev->dev,