[alsa-devel] [PATCH V2] Add i.MX sound support

[s.hauer@pengutronix.de (Sascha Hauer)]

On Mon, Nov 30, 2009 at 02:13:47PM +0100, javier Martin wrote:
> 2009/11/30 Sascha Hauer <s.hauer@pengutronix.de>
> 
> > On Mon, Nov 30, 2009 at 11:43:23AM +0100, javier Martin wrote:
> > > Hi Sascha,
> > > have you tested capture direction on an i.MX27 based board?
> > >
> > > I have been testing your patches in the place you suggested and playback
> > > seems to work fine but I have several problems with capture stream. I
> > found
> > > a BUG in the audmux_v1 code
> > > and I have fixed it but I am still having problems with capture. The file
> > > keeps empty and nothing is recorded.
> >
> > Capture works fine on my boards.
> >
> >
> >
> > > Please could you try the following on an i.MX27 based board?
> > >
> > > arecord -t raw -c 1 -f S16_LE test.wav
> >
> > Does it work with two channels? Do you use DMA or FIQ? Could you try the
> > other variant?
> >
> 
>  Unfortunately, I can't test it using two channels because our board has a
> wm8974 mono codec. Please could you point me how can I change between FIQ
> and DMA? I thought FIQ was only for AC97,

It's around line 662:


	if ((cpu_is_mx27() || cpu_is_mx21()) &&
			!(ssi->flags & IMX_SSI_USE_AC97)) {
		ssi->flags |= IMX_SSI_DMA;
		platform = imx_ssi_dma_mx2_init(pdev, ssi);
	} else
		platform = imx_ssi_fiq_init(pdev, ssi);

Just make sure IMX_SSI_DMA is cleared and imx_ssi_fiq_init() is called.

Sascha


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