[alsa-devel] [PATCH v3 2/9] ARM: OMAP: mcbsp: Enable FIFO use for OMAP2430

Peter Ujfalusi peter.ujfalusi at ti.com
Fri Aug 17 16:03:23 CEST 2012

On 08/17/2012 04:14 PM, Jarkko Nikula wrote:
> On 08/17/2012 04:07 PM, Tony Lindgren wrote:
>> * Peter Ujfalusi <peter.ujfalusi at ti.com> [120816 06:41]:
>>> On OMAP2430 all McBSP ports have 128 word long buffer, enable the use of
>>> the FIFO for the audio stack.
>> Is this the case also for 2420? I thought some only had a FIFO at
>> one port?
> IRCC (I don't have specs), nope. Only 2430 (as noted by Peter) and
> onwards have FIFO.
> But that's true that FIFO sizes differ between the ports. E.g. only
> ports 2 and 3 have 1024+128 deep FIFOs in OMAP3.

OMAP2420 McBSP does not have FIFO (the IP is closer to OMAP1 McBSP).
OMAP2430, OMAP4, OMAP5 has 128 word long FIFO on all McBSP ports.
On OMAP3: McBSP2 have 1024+256 (1280) word FIFO the rest of the ports have 128
long FIFO.


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