* ASoC machine driver: how to configure supported frame rates?
@ 2014-10-10 16:12 Sergej Sawazki
2014-10-10 18:29 ` Lars-Peter Clausen
0 siblings, 1 reply; 3+ messages in thread
From: Sergej Sawazki @ 2014-10-10 16:12 UTC (permalink / raw)
To: alsa-devel
Dear all,
I'm writing an ALSA SoC machine driver. The codec on my board, as well
as the cpu do support the following rates: SNDRV_PCM_RATE_8000_192000
However, the codec, as well as the cpu are clock slaves and the clocks
are fixed. Hence, my board does only support the 96kHz sample rate.
Can someone give me some advice on how to tell ALSA that my board does
only support the rate SNDRV_PCM_RATE_96000?
I don't want to modify the codec and the platform driver.
Any help would be highly appreciated. Thanks!
- Sergej
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: ASoC machine driver: how to configure supported frame rates?
2014-10-10 16:12 ASoC machine driver: how to configure supported frame rates? Sergej Sawazki
@ 2014-10-10 18:29 ` Lars-Peter Clausen
2014-10-10 20:42 ` Sergej Sawazki
0 siblings, 1 reply; 3+ messages in thread
From: Lars-Peter Clausen @ 2014-10-10 18:29 UTC (permalink / raw)
To: Sergej Sawazki, alsa-devel
On 10/10/2014 06:12 PM, Sergej Sawazki wrote:
> Dear all,
>
> I'm writing an ALSA SoC machine driver. The codec on my board, as well
> as the cpu do support the following rates: SNDRV_PCM_RATE_8000_192000
>
> However, the codec, as well as the cpu are clock slaves and the clocks
> are fixed. Hence, my board does only support the 96kHz sample rate.
>
> Can someone give me some advice on how to tell ALSA that my board does
> only support the rate SNDRV_PCM_RATE_96000?
> I don't want to modify the codec and the platform driver.
>
> Any help would be highly appreciated. Thanks!
You can apply additional constraints in the startup callback of the
snd_soc_ops of DAI link in your board driver.
For example see sound/soc/samsung/h1940_uda1380.c
- Lars
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: ASoC machine driver: how to configure supported frame rates?
2014-10-10 18:29 ` Lars-Peter Clausen
@ 2014-10-10 20:42 ` Sergej Sawazki
0 siblings, 0 replies; 3+ messages in thread
From: Sergej Sawazki @ 2014-10-10 20:42 UTC (permalink / raw)
To: Lars-Peter Clausen; +Cc: alsa-devel
Am 10.10.2014 um 20:29 schrieb Lars-Peter Clausen:
> On 10/10/2014 06:12 PM, Sergej Sawazki wrote:
>> Dear all,
>>
>> I'm writing an ALSA SoC machine driver. The codec on my board, as well
>> as the cpu do support the following rates: SNDRV_PCM_RATE_8000_192000
>>
>> However, the codec, as well as the cpu are clock slaves and the clocks
>> are fixed. Hence, my board does only support the 96kHz sample rate.
>>
>> Can someone give me some advice on how to tell ALSA that my board does
>> only support the rate SNDRV_PCM_RATE_96000?
>> I don't want to modify the codec and the platform driver.
>>
>> Any help would be highly appreciated. Thanks!
>
> You can apply additional constraints in the startup callback of the
> snd_soc_ops of DAI link in your board driver.
>
> For example see sound/soc/samsung/h1940_uda1380.c
>
> - Lars
>
Lars, thanks for you help. It is working.
- Sergej
^ permalink raw reply [flat|nested] 3+ messages in thread
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