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| author | Bard Liao <yung-chuan.liao@linux.intel.com> | 2022-06-14 12:26:30 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-06-14 13:33:49 +0300 |
| commit | a150345aa758492e05d2934f318ce7c2566b1cfe (patch) | |
| tree | 50356d3889a929354eed4906310a701165621372 /sound/soc/sof/ipc4-topology.h | |
| parent | 30ac49841386f933339817771ec315a34a4c0edd (diff) | |
| download | linux-a150345aa758492e05d2934f318ce7c2566b1cfe.tar.xz | |
ASoC: SOF: ipc4-topology: add SoundWire/ALH aggregation support
Some SoundWire hardware topologies rely on different amplifiers or
capture devices connected on different links. These devices need to be
'aggregated', remain synchronized and be handled as a single logical
device.
In the IPC3 solution, the aggregation for amplifiers was handled by a
firmware 'demux' component. In the IPC4 solution, the demux component is
not needed, the gateway component can handle multiple ALH/DMA transfers
at the same time. This change makes the topology slightly more complicated
in that only one ALH DAI will be connected in the topology with the
gateway. The other DAIs that are part of the 'aggregated' dailink are not
shown in the DAPM graph as connected to the gateway, but they will however
be activated thanks to a feature in soc-dapm.c where events are forwarded
to all DAIs in the dailink (see soc_dapm_stream_event).
The topology also sets the same stream name for all widgets, dais and
dailinks, so a search for the stream name helps identify cases where
SoundWire/ALH aggregation is needed.
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Link: https://lore.kernel.org/r/20220614092630.20144-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/sof/ipc4-topology.h')
| -rw-r--r-- | sound/soc/sof/ipc4-topology.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/sound/soc/sof/ipc4-topology.h b/sound/soc/sof/ipc4-topology.h index 1a9c0627bae9..3bc2fe38c733 100644 --- a/sound/soc/sof/ipc4-topology.h +++ b/sound/soc/sof/ipc4-topology.h @@ -42,6 +42,17 @@ #define ALH_MAX_NUMBER_OF_GTW 16 +/* + * The base of multi-gateways. Multi-gateways addressing starts from + * ALH_MULTI_GTW_BASE and there are ALH_MULTI_GTW_COUNT multi-sources + * and ALH_MULTI_GTW_COUNT multi-sinks available. + * Addressing is continuous from ALH_MULTI_GTW_BASE to + * ALH_MULTI_GTW_BASE + ALH_MULTI_GTW_COUNT - 1. + */ +#define ALH_MULTI_GTW_BASE 0x50 +/* A magic number from FW */ +#define ALH_MULTI_GTW_COUNT 8 + /** * struct sof_ipc4_pipeline - pipeline config data * @priority: Priority of this pipeline |