ASoC: SOF: Intel: hda-codec: Delay the codec device registration #4732
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plbossart
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Dec 5, 2023
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The current code flow is: 1. snd_hdac_device_register() 2. set parameters needed by the hdac driver 3. request_codec_module() the hdac driver is probed at this point During boot the codec drivers are not loaded when the hdac device is registered, it is going to be probed later when loading the codec module, which point the parameters are set. On module remove/insert rmmod snd_sof_pci_intel_tgl modprobe snd_sof_pci_intel_tgl The codec module remains loaded and the driver will be probed when the hdac device is created right away, before the parameters for the driver has been configured: 1. snd_hdac_device_register() the hdac driver is probed at this point 2. set parameters needed by the hdac driver 3. request_codec_module() will be a NOP as the module is already loaded Move the snd_hdac_device_register() later, to be done right before requesting the codec module to make sure that the parameters are all set before the device is created: 1. set parameters needed by the hdac driver 2. snd_hdac_device_register() 3. request_codec_module() This way at the hdac driver probe all parameters will be set in all cases. Link: thesofproject#4731 Fixes: a0575b4 ("ASoC: hdac_hda: Conditionally register dais for HDMI and Analog") Signed-off-by: Peter Ujfalusi <[email protected]>
bardliao
approved these changes
Dec 6, 2023
plbossart
approved these changes
Dec 6, 2023
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The current code flow is:
the hdac driver is probed at this point
During boot the codec drivers are not loaded when the hdac device is
registered, it is going to be probed later when loading the codec module,
which point the parameters are set.
On module remove/insert
rmmod snd_sof_pci_intel_tgl
modprobe snd_sof_pci_intel_tgl
The codec module remains loaded and the driver will be probed when the
hdac device is created right away, before the parameters for the driver
has been configured:
the hdac driver is probed at this point
will be a NOP as the module is already loaded
Move the snd_hdac_device_register() later, to be done right before
requesting the codec module to make sure that the parameters are all set
before the device is created:
This way at the hdac driver probe all parameters will be set in all cases.
Link: #4731
Fixes: a0575b4 ("ASoC: hdac_hda: Conditionally register dais for HDMI and Analog")