[4/4] ASoC: SOF: ipc4-pcm: Do not reset the ChainDMA if it has not been allocated

Commit Message

Peter Ujfalusi April 9, 2024, 11 a.m. UTC

The ChainDMA operation differs from normal pipelines that it is only
created when the stream started, in fact a PCM using ChainDMA has no
pipelines, modules.
To reset a ChainDMA, it needs to be first allocated in firmware. When
PulseAudio/PipeWire starts, they will probe the PCMs by opening them, check
hw_params and then close the PCM without starting audio.
Unconditionally resetting the ChainDMA can result the following error:

ipc tx      : 0xe040000|0x0: GLB_CHAIN_DMA
ipc tx reply: 0x2e000007|0x0: GLB_CHAIN_DMA
FW reported error: 7 - Unsupported operation requested
ipc error for msg 0xe040000|0x0
sof_pcm_stream_free: pcm_ops hw_free failed -22

Add a new chain_dma_allocated flag to sof_ipc4_pcm_stream_priv to store the
ChainDMA allocation state and use this flag to skip sending the reset if
the ChainDMA is not allocated.

Signed-off-by: Peter Ujfalusi <[e-mail]>
Reviewed-by: Pierre-Louis Bossart <[e-mail]>
Reviewed-by: Ranjani Sridharan <[e-mail]>
---
 sound/soc/sof/ipc4-pcm.c | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

Patch

diff --git a/sound/soc/sof/ipc4-pcm.c b/sound/soc/sof/ipc4-pcm.c
index 34ce6bb7f37d..4594470ed08b 100644
--- a/sound/soc/sof/ipc4-pcm.c
+++ b/sound/soc/sof/ipc4-pcm.c
@@ -40,9 +40,12 @@  struct sof_ipc4_timestamp_info {
 /**
  * struct sof_ipc4_pcm_stream_priv - IPC4 specific private data
  * @time_info: pointer to time info struct if it is supported, otherwise NULL
+ * @chain_dma_allocated: indicates the ChainDMA allocation state
  */
 struct sof_ipc4_pcm_stream_priv {
 	struct sof_ipc4_timestamp_info *time_info;
+
+	bool chain_dma_allocated;
 };
 
 static inline struct sof_ipc4_timestamp_info *
@@ -269,14 +272,17 @@  sof_ipc4_update_pipeline_state(struct snd_sof_dev *sdev, int state, int cmd,
  */
 
 static int sof_ipc4_chain_dma_trigger(struct snd_sof_dev *sdev,
-				      int direction,
+				      struct snd_sof_pcm *spcm, int direction,
 				      struct snd_sof_pcm_stream_pipeline_list *pipeline_list,
 				      int state, int cmd)
 {
 	struct sof_ipc4_fw_data *ipc4_data = sdev->private;
+	struct sof_ipc4_pcm_stream_priv *stream_priv;
 	bool allocate, enable, set_fifo_size;
 	struct sof_ipc4_msg msg = {{ 0 }};
-	int i;
+	int ret, i;
+
+	stream_priv = spcm->stream[direction].private;
 
 	switch (state) {
 	case SOF_IPC4_PIPE_RUNNING: /* Allocate and start chained dma */
@@ -297,6 +303,11 @@  static int sof_ipc4_chain_dma_trigger(struct snd_sof_dev *sdev,
 		set_fifo_size = false;
 		break;
 	case SOF_IPC4_PIPE_RESET: /* Disable and free chained DMA. */
+
+		/* ChainDMA can only be reset if it has been allocated */
+		if (!stream_priv->chain_dma_allocated)
+			return 0;
+
 		allocate = false;
 		enable = false;
 		set_fifo_size = false;
@@ -354,7 +365,12 @@  static int sof_ipc4_chain_dma_trigger(struct snd_sof_dev *sdev,
 	if (enable)
 		msg.primary |= SOF_IPC4_GLB_CHAIN_DMA_ENABLE_MASK;
 
-	return sof_ipc_tx_message_no_reply(sdev->ipc, &msg, 0);
+	ret = sof_ipc_tx_message_no_reply(sdev->ipc, &msg, 0);
+	/* Update the ChainDMA allocation state */
+	if (!ret)
+		stream_priv->chain_dma_allocated = allocate;
+
+	return ret;
 }
 
 static int sof_ipc4_trigger_pipelines(struct snd_soc_component *component,
@@ -394,7 +410,7 @@  static int sof_ipc4_trigger_pipelines(struct snd_soc_component *component,
 	 * trigger function that handles the rest for the substream.
 	 */
 	if (pipeline->use_chain_dma)
-		return sof_ipc4_chain_dma_trigger(sdev, substream->stream,
+		return sof_ipc4_chain_dma_trigger(sdev, spcm, substream->stream,
 						  pipeline_list, state, cmd);
 
 	/* allocate memory for the pipeline data */