ASoC: SOF: ipc4: Add support for Intel HW managed mic privacy messaging

ACE3 (Panther Lake) introduced support for microphone privacy feature which
can - in hardware - mute incoming audio data based on a state of a physical
switch.
The change in the privacy state is delivered through interface IP blocks
and can only be handled by the link owner.
In Intel platforms Soundwire is for example host owned, so the interrupt
can only be handled by the host.

Since the input stream is going to be muted by hardware, the host needs to
send a message to firmware about the change in privacy so it can execute a
fade out/in to enhance user experience.

The support for microphone privacy can be queried from the HW_CONFIG data
under the INTEL_MIC_PRIVACY_CAP tuple. This is Intel specific data, the
core will pass it to platform code if the intel_configure_mic_privacy()
callback is provided.

Platform code can call sof_ipc4_mic_privacy_state_change() to send the IPC
message to the firmware on state change.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://patch.msgid.link/20250307112816.1495-6-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/include/sound/sof/ipc4/header.h b/include/sound/sof/ipc4/header.h
index 0c0cf47946b1dfd98351f3c9551f21d105ab427c..f71d04736d176c2530ada8e7a17e49b709712218 100644 (file)
--- a/include/sound/sof/ipc4/header.h
+++ b/include/sound/sof/ipc4/header.h
@@ -396,6 +396,7 @@ enum sof_ipc4_base_fw_params {
        SOF_IPC4_FW_PARAM_MODULES_INFO_GET,
        SOF_IPC4_FW_PARAM_LIBRARIES_INFO_GET = 16,
        SOF_IPC4_FW_PARAM_SYSTEM_TIME = 20,
+       SOF_IPC4_FW_PARAM_MIC_PRIVACY_STATE_CHANGE = 35,
 };
 
 enum sof_ipc4_fw_config_params {
@@ -446,6 +447,18 @@ struct sof_ipc4_dx_state_info {
        uint32_t dx_mask;
 } __packed __aligned(4);
 
+enum sof_ipc4_hw_config_params {
+       SOF_IPC4_HW_CFG_INTEL_MIC_PRIVACY_CAPS = 11,
+};
+
+#define SOF_IPC_INTEL_MIC_PRIVACY_VERSION_PTL  1
+
+struct sof_ipc4_intel_mic_privacy_cap {
+       uint32_t version;
+       uint32_t capabilities_length;
+       uint32_t capabilities[];
+} __packed;
+
 /* Reply messages */
 
 /*

diff --git a/sound/soc/sof/ipc4-loader.c b/sound/soc/sof/ipc4-loader.c
index 6ad1ef0e53e823eb553505ec3f87c3b1dac6597e..d2f534d65edf166f2317e561dc217bab3f52bbde 100644 (file)
--- a/sound/soc/sof/ipc4-loader.c
+++ b/sound/soc/sof/ipc4-loader.c
@@ -502,6 +502,39 @@ int sof_ipc4_query_fw_configuration(struct snd_sof_dev *sdev)
                offset += sizeof(*tuple) + tuple->size;
        }
 
+       /* Get the hardware configuration */
+       msg.primary = SOF_IPC4_MSG_TARGET(SOF_IPC4_MODULE_MSG);
+       msg.primary |= SOF_IPC4_MSG_DIR(SOF_IPC4_MSG_REQUEST);
+       msg.primary |= SOF_IPC4_MOD_ID(SOF_IPC4_MOD_INIT_BASEFW_MOD_ID);
+       msg.primary |= SOF_IPC4_MOD_INSTANCE(SOF_IPC4_MOD_INIT_BASEFW_INSTANCE_ID);
+       msg.extension = SOF_IPC4_MOD_EXT_MSG_PARAM_ID(SOF_IPC4_FW_PARAM_HW_CONFIG_GET);
+
+       msg.data_size = sdev->ipc->max_payload_size;
+
+       ret = iops->set_get_data(sdev, &msg, msg.data_size, false);
+       if (ret)
+               goto out;
+
+       offset = 0;
+       while (offset < msg.data_size) {
+               tuple = (struct sof_ipc4_tuple *)((u8 *)msg.data_ptr + offset);
+
+               switch (tuple->type) {
+               case SOF_IPC4_HW_CFG_INTEL_MIC_PRIVACY_CAPS:
+                       if (ipc4_data->intel_configure_mic_privacy) {
+                               struct sof_ipc4_intel_mic_privacy_cap *caps;
+
+                               caps = (struct sof_ipc4_intel_mic_privacy_cap *)tuple->value;
+                               ipc4_data->intel_configure_mic_privacy(sdev, caps);
+                       }
+                       break;
+               default:
+                       break;
+               }
+
+               offset += sizeof(*tuple) + tuple->size;
+       }
+
 out:
        kfree(msg.data_ptr);
 

diff --git a/sound/soc/sof/ipc4-priv.h b/sound/soc/sof/ipc4-priv.h
index b798810eff9161480b4f49b46c2b098fb5bb307e..58b032820683391b8198261ea76365398d1f90e3 100644 (file)
--- a/sound/soc/sof/ipc4-priv.h
+++ b/sound/soc/sof/ipc4-priv.h
@@ -11,6 +11,7 @@
 
 #include <linux/idr.h>
 #include <sound/sof/ext_manifest4.h>
+#include <sound/sof/ipc4/header.h>
 #include "sof-priv.h"
 
 /* The DSP window indices are fixed */
@@ -89,6 +90,8 @@ struct sof_ipc4_fw_data {
 
        int (*load_library)(struct snd_sof_dev *sdev,
                            struct sof_ipc4_fw_library *fw_lib, bool reload);
+       void (*intel_configure_mic_privacy)(struct snd_sof_dev *sdev,
+                                           struct sof_ipc4_intel_mic_privacy_cap *caps);
        struct mutex pipeline_state_mutex; /* protect pipeline triggers, ref counts and states */
 };
 
@@ -118,4 +121,6 @@ void sof_ipc4_update_cpc_from_manifest(struct snd_sof_dev *sdev,
 size_t sof_ipc4_find_debug_slot_offset_by_type(struct snd_sof_dev *sdev,
                                               u32 slot_type);
 
+void sof_ipc4_mic_privacy_state_change(struct snd_sof_dev *sdev, bool state);
+
 #endif

diff --git a/sound/soc/sof/ipc4.c b/sound/soc/sof/ipc4.c
index 2ed0c52fb2f169d40d31787bba74711f23949747..37e837b22ac88c1da6fd6260a3ad78fa77b5ba17 100644 (file)
--- a/sound/soc/sof/ipc4.c
+++ b/sound/soc/sof/ipc4.c
@@ -851,3 +851,21 @@ const struct sof_ipc_ops ipc4_ops = {
        .pcm = &ipc4_pcm_ops,
        .fw_tracing = &ipc4_mtrace_ops,
 };
+
+void sof_ipc4_mic_privacy_state_change(struct snd_sof_dev *sdev, bool state)
+{
+       struct sof_ipc4_msg msg;
+       u32 data = state;
+
+       msg.primary = SOF_IPC4_MSG_TARGET(SOF_IPC4_MODULE_MSG);
+       msg.primary |= SOF_IPC4_MSG_DIR(SOF_IPC4_MSG_REQUEST);
+       msg.primary |= SOF_IPC4_MOD_ID(SOF_IPC4_MOD_INIT_BASEFW_MOD_ID);
+       msg.primary |= SOF_IPC4_MOD_INSTANCE(SOF_IPC4_MOD_INIT_BASEFW_INSTANCE_ID);
+       msg.extension = SOF_IPC4_MOD_EXT_MSG_PARAM_ID(SOF_IPC4_FW_PARAM_MIC_PRIVACY_STATE_CHANGE);
+
+       msg.data_size = sizeof(data);
+       msg.data_ptr = &data;
+
+       sof_ipc4_set_get_data(sdev, &msg, msg.data_size, true);
+}
+EXPORT_SYMBOL(sof_ipc4_mic_privacy_state_change);