Currently IPC4 has no notion of a switch or enum type of control which is
a generic concept in ALSA.
The generic support for these control types will be as follows:
- large config is used to send the channel-value par array
- param_id of a SWITCH type is 200
- param_id of an ENUM type is 201
Each module need to support a switch or/and enum must handle these
universal param_ids.
The message payload is described by struct sof_ipc4_control_msg_payload.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
Reviewed-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
---
sound/soc/sof/ipc4-topology.h | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/sound/soc/sof/ipc4-topology.h b/sound/soc/sof/ipc4-topology.h
index d94f0ab4aee3..0a57b8ab3e08 100644
--- a/sound/soc/sof/ipc4-topology.h
+++ b/sound/soc/sof/ipc4-topology.h
@@ -319,7 +319,7 @@ struct sof_ipc4_copier {
/**
* struct sof_ipc4_ctrl_value_chan: generic channel mapped value data
* @channel: Channel ID
- * @value: gain value
+ * @value: Value associated with @channel
*/
struct sof_ipc4_ctrl_value_chan {
u32 channel;
@@ -343,6 +343,23 @@ struct sof_ipc4_control_data {
};
};
+#define SOF_IPC4_SWITCH_CONTROL_PARAM_ID 200
+#define SOF_IPC4_ENUM_CONTROL_PARAM_ID 201
+
+/**
+ * struct sof_ipc4_control_msg_payload - IPC payload for kcontrol parameters
+ * @id: unique id of the control
+ * @num_elems: Number of elements in the chanv array
+ * @reserved: reserved for future use, must be set to 0
+ * @chanv: channel ID and value array
+ */
+struct sof_ipc4_control_msg_payload {
+ uint16_t id;
+ uint16_t num_elems;
+ uint32_t reserved[4];
+ DECLARE_FLEX_ARRAY(struct sof_ipc4_ctrl_value_chan, chanv);
+} __packed;
+
/**
* struct sof_ipc4_gain_data - IPC gain blob
* @channels: Channels
--
2.42.0
