[alsa-devel] [PATCH v4 3/8] ASoC: Intel: Boards: Machine driver for SKL+ w/ HDAudio codecs

[Pierre-Louis Bossart]

On 7/25/18 11:22 AM, Vinod wrote:
> On 25-07-18, 09:10, Pierre-Louis Bossart wrote:
>> On 7/25/18 6:11 AM, Vinod wrote:
> 
>>>> +		.dpcm_playback = 1,
>>>> +		.no_pcm = 1,
>>>> +	},
>>>> +	{
>>>> +		.name = "iDisp2",
>>>> +		.id = 2,
>>>> +		.cpu_dai_name = "iDisp2 Pin",
>>>> +		.codec_name = "ehdaudio0D2",
>>>> +		.codec_dai_name = "intel-hdmi-hifi2",
>>>> +		.platform_name = "0000:00:1f.3",
>>>> +		.dpcm_playback = 1,
>>>> +		.no_pcm = 1,
>>>> +	},
>>>> +	{
>>>> +		.name = "iDisp3",
>>>> +		.id = 3,
>>>
>>> shouldn't this be queried. not all will have 3 links
>>
>> Not that I know of. I've always seen SKL+ with 3 audio streams to iDisp.
> 
> IIRC later ones (after KBL) have 5 CVTs and 4 pins (or vice-versa)

Let me check on this.

> 
>>>> +static struct platform_driver skl_hda_audio = {
>>>> +	.probe = skl_hda_audio_probe,
>>>> +	.driver = {
>>>> +		.name = "skl_hda_dsp_generic",
>>>
>>> who creates this pdev, is it the board details (mach name?)
>>
>> Not sure I understand your question, this part is similar to all other Intel
>> machine drivers and the way by with the probe happens is also similar. There
>> is nothing new here, the skylake platform driver finds an entry in a table,
>> gets the driver name and creates the relevant device.
> 
> Okay sounds good. I was curious if the generic machine device is created
> generically or use the tables..

we anticipate that there will be quirks, e.g. a machine with an HDaudio 
codec but DMICs, and the idea is that those quirks would point a 
different table entry (or set a pdata field). For now we haven't done 
any work on those quirks, we'll deal with them as we see new variants.