commit 060a07cd9bc69eba2da33ed96b1fa69ead60bab1 upstream. 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. Stable 6.6.y note: Fixes NULL dereference on Meteor Lake platforms with new SOF release due to the use of Swithc/Enum controls. Link: https://github.com/thesofproject/sof/issues/9600 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> Link: https://lore.kernel.org/r/20230919103115.30783-2-peter.ujfalusi@xxxxxxxxxxxxxxx Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> # 6.6.x --- 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 21436657ad85..0fb759c6eeaf 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_params - IPC gain parameters * @channels: Channels -- 2.47.0
