topology2: add split topologies description #507
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| Linux kernel can load multiple topologies, a topology for a single function. | ||
| This feature is useful when a single device is disabled in specific productuds. To achieve this, you need to split |
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typo: s/productuds/products
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| Linux kernel can load multiple topologies, a topology for a single function. | ||
| This feature is useful when a single device is disabled in specific productuds. To achieve this, you need to split | ||
| the topology into multiple tplg files. The split topology files should be named as follows: |
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I think this is more useful to handle the mix and match nature of things?
Or actually to support SDCA setups with standardized components.
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Yeah, lets call out this is to support SDCA standards.
| .. code-block:: bash | ||
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| sdca-jack | ||
| sdca-<n>amp where n is the amp link numbers |
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No, it is the amp link number. For example, if there are 2 amps on the same link, n should be 1. I.e. sdca-1amp
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| .. code-block:: bash | ||
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| sdca-jack |
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this handles headphone, headset and line jack?
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Yes, it includes the "Jack Out" and "Jack In" PCMs
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| sdca-jack | ||
| sdca-<n>amp where n is the amp link numbers | ||
| sdca-mic |
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chase build mic (analog or DMIC) and headset mic?
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sdca-mic is for the build mic that connected to the SDW codecs. Not headset mic. The headset mic is handled by the sdca-jack device.
| sdca-jack | ||
| sdca-<n>amp where n is the amp link numbers | ||
| sdca-mic | ||
| dmic-<n>ch where n is the channel numbers. Currently, only 2ch and 4ch are supported. |
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this is not SNDW connected DMIC or SNDW connected?
'where n is the number of supported channels'
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do we have a max number of channels ? best to say either way.
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this is not SNDW connected DMIC or SNDW connected?
This is for PCH-DMIC.
do we have a max number of channels ?
Currently only 2 and 4 channels are supported. So the max number of channels is 4.
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| .. code-block:: bash | ||
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| sof-arl-sdca-2amp-id2.tplg |
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so in topology it is better to ship sof-arl-sdca-2amp-id[1-256].tplg to cover pretty much any place the 2amp can be?
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Not necessary, the BE id of amp is fixed to 2 in the machine driver. Unless there is a special case, otherwise, -id2 is good enough.
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| The split topologies are the subset of the monolithic topology. Usually, you just need to add a description with proper | ||
| macro settings to disable the features that you don't need and set the first BE ID that in the topology in the cmake file | ||
| to generate the split topologies. |
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Can these topologies have dependencies in order of loading them, that one topology refers to some component from other topology?
LIke direct routing audio from mic to speaker via some processing.
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We don't support this so far. Currently, all split topologies are independent.
| sdca-<n>amp where n is the amp link numbers | ||
| sdca-mic | ||
| dmic-<n>ch where n is the channel numbers. Currently, only 2ch and 4ch are supported. | ||
| sdca-hdmi |
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SNDW connected display audio or HDA connected display audio in a system where other codecs are SNDW?
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HDA connected display audio in a system where other codecs are SNDW.
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@ranj063 pls review |
Describe what are split topologies and how to create it. Signed-off-by: Bard Liao <[email protected]>
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Describe what are split topologies and how to create it.