6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
commit e6fc5fcaeffa04a3fa1db8dfccdfd4b6001c0446 upstream.
The DMA Link ID is set to the IPC message's primary during dai_config,
which is only during hw_params.
During xrun handling the hw_params is not called and the DMA Link ID
information will be lost.
All other fields in the message expected to be 0 for re-configuration, only
the DMA Link ID needs to be preserved and the in case of repeated
dai_config, it is correctly updated (masked and then set).
Cc: stable@xxxxxxxxxxxxxxx
Fixes: ca5ce0caa67f ("ASoC: SOF: ipc4/intel: Add support for chained DMA")
Link: https://github.com/thesofproject/linux/issues/5116
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
Reviewed-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Link: https://patch.msgid.link/20240724081932.24542-3-peter.ujfalusi@xxxxxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/soc/sof/ipc4-topology.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
--- a/sound/soc/sof/ipc4-topology.c
+++ b/sound/soc/sof/ipc4-topology.c
@@ -1254,7 +1254,13 @@ static void sof_ipc4_unprepare_copier_mo
ipc4_copier = dai->private;
if (pipeline->use_chain_dma) {
- pipeline->msg.primary = 0;
+ /*
+ * Preserve the DMA Link ID and clear other bits since
+ * the DMA Link ID is only configured once during
+ * dai_config, other fields are expected to be 0 for
+ * re-configuration
+ */
+ pipeline->msg.primary &= SOF_IPC4_GLB_CHAIN_DMA_LINK_ID_MASK;
pipeline->msg.extension = 0;
}
