Hi, The current IPC client infrastructure can only be used with IPC3. This series carries updates for the core side of the client support to handle IPC4 messages and updates the ipc message injector to be usable with IPC4. The IPC flood test is only supported by SOF_IPC (IPC3), we are not going to create the aux device for it at all if the firmware is using IPC4. Regards, Peter --- Peter Ujfalusi (8): ASoC: SOF: sof-client: Add API to get the maximum IPC payload size ASoC: SOF: ipc-msg-injector: Query the maximum IPC payload size ASoC: SOF: sof-client-probes: Query the maximum IPC payload size ASoC: SOF: sof-client: Add API to get the ipc_type ASoC: SOF: sof-client: Add support IPC4 message sending ASoC: SOF: ipc-msg-injector: Separate the message sending ASoC: SOF: ipc-msg-injector: Add support for IPC4 messages ASoC: SOF: sof-client: IPC flood test can only work with SOF_IPC sound/soc/sof/sof-client-ipc-msg-injector.c | 181 ++++++++++++++++++-- sound/soc/sof/sof-client-probes.c | 5 +- sound/soc/sof/sof-client.c | 66 ++++++- sound/soc/sof/sof-client.h | 2 + 4 files changed, 227 insertions(+), 27 deletions(-) -- 2.36.0