ASoC: Intel: avs: Do not treat unsupported IPCs as invalid

Utilize NOT_SUPPORTED status code to differentiate between unsupported
and invalid requests. Skip over error paths if it is the former that is
communicated by the base firmware.
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20221010121955.718168-12-cezary.rojewski@intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/avs/avs.h

@@ -220,8 +220,10 @@ static inline void avs_ipc_err(struct avs_dev *adev, struct avs_ipc_msg *tx,
 	/*
 	 * If IPC channel is blocked e.g.: due to ongoing recovery,
 	 * -EPERM error code is expected and thus it's not an actual error.
+	 *
+	 * Unsupported IPCs are of no harm either.
 	 */
-	if (error == -EPERM)
+	if (error == -EPERM || error == AVS_IPC_NOT_SUPPORTED)
 		dev_dbg(adev->dev, "%s 0x%08x 0x%08x failed: %d\n", name,
 			tx->glb.primary, tx->glb.ext.val, error);
 	else

sound/soc/intel/avs/messages.h

@@ -150,6 +150,8 @@ union avs_module_msg {
 	};
 } __packed;
 
+#define AVS_IPC_NOT_SUPPORTED 15
+
 union avs_reply_msg {
 	u64 val;
 	struct {