Introducing Virtual FE dai link #6
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Hostless pipelines lack a FE dai that is used to establish a path to the BE and enable the codecs. Virtual FE dai links can be used in such cases to establish a connection to the BE. This patch adds a new flag named "virtual" to the dai link structure that will be used to check if a dai link is virtual. Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
This patch adds the methods for create a virtual FE dal link and add it to the sound card. It also adds the method to free the virtual FE connected to the card. Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
When walking the graph to discover the path from the virtual FE to the BE, there is only one widget in the path. Do not remove this BE widget from the list, so it can be used to connect with the virtual FE dai link. Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
…irtual dai link Virtual FE dai links should be manually set to running state by default with a pcm runtime. The active count of their cpu_dai and codec_dai's should also be updated. This is required to establish FE-BE connection and enable the BE DAI when the dpcm runtime is updated. Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Virtual FE dai links do not need to register the pcm device. So just create the empty pcm device and substream in the requested direction. Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
the soc_dpcm_runtime_update() method will be called to establish a connection to the BE and enable the codec. So make this method accessible to modules. Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
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Sorry, I've got issues with my github fork. let me re-submit this in a bit. |
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This set of patches introduces the concept of a virtual FE dai link.
Previously, when trying to enable the hostless pipeline, it was
discovered that the codec does not get enabled and the tone remained inaudible.
Therefore, in such cases, a virtual FE dai link will be used to establish
a connection to the BE dai and enable the codec when the pipeline is triggered.
The virtual FE will be created when a siggen widget is loaded and freed when
the siggen widget is unloaded. It will be used for enabling the BE dai in the
kcontrol IO handler for the kcontrol attached to the siggen by calling
the soc_spcm_runtime_update() method.