Messages in this thread | | | Date | Tue, 7 Aug 2012 17:50:20 +0100 | From | Mark Brown <> | Subject | Re: [PATCH 4/9] ASoC: imx: Don't use {en,dis}able_fiq() calls |
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On Tue, Aug 07, 2012 at 08:35:58AM +0200, Sascha Hauer wrote:
> Nowadays the FIQ support is necessary only for AC97. The AC97 support in > the SSI unit is buggy: It does not allow you to select the slots you > want to receive. At least the wm9712 codec always sends (apart from the > stereo data) data in slot (I think it is) 12. You find this data mixed > in your audio stream. The FIQ driver skips this data to get a valid > audio stream.
Right, any device with GPIO support will do this - it's how GPIO works in AC'97.
> One other way to solve this would be to use dma here and to filter out > the data afterwards.
Yup. That's probably more sane but also more work to implement.
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