Re: [PATCH 1/2] ASoC: Intel: avs: Add rt5514 machine board

[Krzysztof Kozlowski <krzk@kernel.org>]

On 30/10/2023 12:50, Amadeusz Sławiński wrote:
> On 10/28/2023 10:46 AM, Krzysztof Kozlowski wrote:
>> On 27/10/2023 13:05, Amadeusz Sławiński wrote:
>>> To support AVS-rt5514 configuration add machine board connecting AVS
>>> platform component driver with rt5514 codec one.
>>>
>>> Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
>>> ---
>>>   sound/soc/intel/avs/boards/Kconfig  |  10 ++
>>>   sound/soc/intel/avs/boards/Makefile |   2 +
>>>   sound/soc/intel/avs/boards/rt5514.c | 187 ++++++++++++++++++++++++++++
>>>   3 files changed, 199 insertions(+)
>>>   create mode 100644 sound/soc/intel/avs/boards/rt5514.c
>>
>> ...
>>
>>> +
>>> +static struct platform_driver avs_rt5514_driver = {
>>> +	.probe = avs_rt5514_probe,
>>> +	.driver = {
>>> +		.name = "avs_rt5514",
>>> +		.pm = &snd_soc_pm_ops,
>>> +	},
>>> +};
>>> +
>>> +module_platform_driver(avs_rt5514_driver);
>>> +
>>> +MODULE_LICENSE("GPL");
>>> +MODULE_ALIAS("platform:avs_rt5514");
>>
>> You should not need MODULE_ALIAS() in normal cases. If you need it,
>> usually it means your device ID table is wrong.
>>
> 
> In theory yes, in practice it is a bit more complicated, as we use the 
> driver alias in sound/soc/intel/avs/board_selection.c in 
> snd_soc_acpi_mach and they should match.
> 
> For example for rt286, there is:
> # modinfo 
> /lib/modules/6.4.0-rc3+/kernel/sound/soc/intel/avs/boards/snd-soc-avs-rt286.ko 
> | grep 286
> filename: 
> /lib/modules/6.4.0-rc3+/kernel/sound/soc/intel/avs/boards/snd-soc-avs-rt286.ko
> alias:          platform:avs_rt286
> name:           snd_soc_avs_rt286
> as you can see platform_driver::driver::name is not matching the driver 
> name.
> 
> I've did quick test with removing alias and changing snd_soc_acpi_mach 
> definition for one board and it didn't load.

Sorry, but why do you talk about platform name? We talk about ID table!

> 
> Now that you pointed it out I also lean towards trying to remove 
> MODULE_ALIAS() from board drivers, but it will probably require some 
> more investigation if we really want to do it and implementing it properly.

Ehm? We have been there. I've been dropping these useless aliases as
well. You miss DEVICE_TABLE and proper ID entries, not adding aliases.



Best regards,
Krzysztof