ASoC: get sdw dmic number for Intel platforms#5843
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We can get how many mic transducers are connected to the codec. The information will be used for selecting the topology with proper dmic channel number. Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
The commit get the sdca sdw dmic number form the mipi-sdca-cluster-channel-id property. The dai link name will be used to select the function topology with a proper dmic channel number. Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
bardliao
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dbaluta,
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lgirdwood,
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ranj063
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Pull request overview
This PR adds support for deriving the SoundWire DMIC channel/transducer count from SDCA firmware-described entities and appending that count to Intel SOF SoundWire DAI link names, enabling more precise topology selection based on connected microphone transducers.
Changes:
- Add
sdca_get_mic_count()to parse SDCA Function entity metadata and return a microphone transducer count. - Update Intel SOF SoundWire machine driver to query SDCA SmartMic functions and suffix the DAI link name with
-<N>ch. - Expose the new helper via
include/sound/sdca.hand import the SDCA symbol namespace in the machine driver.
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 5 comments.
| File | Description |
|---|---|
| sound/soc/sdca/sdca_functions.c | Adds sdca_get_mic_count() to parse SDCA entity properties and extract microphone transducer count. |
| sound/soc/intel/boards/sof_sdw.c | Appends SDCA-derived mic channel count to SoundWire capture link name for topology matching; adds SDCA namespace import. |
| include/sound/sdca.h | Exposes sdca_get_mic_count() in the public SDCA header. |
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| #include <sound/core.h> | ||
| #include <sound/sdca_function.h> | ||
| #include <sound/soc.h> | ||
| #include <sound/soc-acpi.h> |
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| if (entity_type == SDCA_ENTITY_TYPE_IT) { | ||
| ret = fwnode_property_read_u32(entity_node, | ||
| "mipi-sdca-terminal-type", | ||
| &terminal_type); | ||
| if (ret) | ||
| continue; | ||
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| if (terminal_type != SDCA_TERM_TYPE_MICROPHONE_TRANSDUCER && | ||
| terminal_type != SDCA_TERM_TYPE_MICROPHONE_ARRAY_TRANSDUCER) | ||
| continue; | ||
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| ret = fwnode_property_read_u32(entity_node, | ||
| "mipi-sdca-terminal-transducer-count", | ||
| &transducer_count); | ||
| if (ret) | ||
| continue; | ||
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| dev_info(&slave->dev, | ||
| "SDCA function %s entity %s: iot mipi-sdca-terminal-type=%#x mipi-sdca-terminal-transducer-count=%u\n", | ||
| function->name, entity_label, terminal_type, transducer_count); | ||
| break; | ||
| } | ||
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| fwnode_handle_put(entity_node); |
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| num_entities = fwnode_property_count_u32(function_node, | ||
| "mipi-sdca-entity-id-list"); | ||
| if (num_entities <= 0) { | ||
| dev_err(&slave->dev, | ||
| "%pfwP: no entity list found for function type %u\n", | ||
| function_node, function->type); | ||
| return -EINVAL; | ||
| } | ||
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| entity_list = kcalloc(num_entities, sizeof(*entity_list), GFP_KERNEL); | ||
| if (!entity_list) | ||
| return -ENOMEM; | ||
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| ret = fwnode_property_read_u32_array(function_node, | ||
| "mipi-sdca-entity-id-list", | ||
| entity_list, num_entities); | ||
| if (ret) { | ||
| dev_err(&slave->dev, | ||
| "%pfwP: failed to read entity id list for function type %u: %d\n", | ||
| function_node, function->type, ret); | ||
| return -EINVAL; | ||
| } |
| #if IS_ENABLED(CONFIG_ACPI) && IS_ENABLED(CONFIG_SND_SOC_SDCA) | ||
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| void sdca_lookup_functions(struct sdw_slave *slave); | ||
| int sdca_get_mic_count(struct sdw_slave *slave, struct sdca_function_desc *function); |
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| peripheral = sof_sdw_get_peripheral_by_codec_name(sof_end->codec_name); | ||
| if (!peripheral) { | ||
| dev_err(dev, "failed to get peripheral for codec %s\n", | ||
| sof_end->codec_name); | ||
| break; | ||
| } | ||
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| for (k = 0; k < peripheral->sdca_data.num_functions; k++) { | ||
| if (peripheral->sdca_data.function[k].type != SDCA_FUNCTION_TYPE_SMART_MIC) | ||
| continue; | ||
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| sdw_mic_num = sdca_get_mic_count(peripheral, &peripheral->sdca_data.function[k]); | ||
| dev_dbg(dev, "%s mic num %d\n", sof_end->codec_name, sdw_mic_num); | ||
| if (sdw_mic_num > 0) { | ||
| char *tmp = name; | ||
| name = devm_kasprintf(dev, GFP_KERNEL, "%s-%dch", name, sdw_mic_num); | ||
| if (!name) | ||
| return -ENOMEM; | ||
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| devm_kfree(dev, tmp); | ||
| } | ||
| } |
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The topology needs to set the DMIC channel number according to the number of transducers connected to the codec. This information can be provided via the DAI link name for proper topology selection.