[alsa-devel] [PATCH 0/3] ASoC: Davinci: McASP: add support new McASP IP Variant
zonque at gmail.com
Wed Oct 3 13:16:39 CEST 2012
On 03.10.2012 09:16, Hebbar, Gururaja wrote:
> On Wed, Oct 03, 2012 at 03:58:45, Daniel Mack wrote:
>> On 31.08.2012 14:50, Hebbar, Gururaja wrote:
>>> The OMAP2+ variant of McASP is different from Davinci variant w.r.to some
>>> register offset and missing generic SRAM APIs support
>>> - Add new MCASP_VERSION_3 to identify new variant. New DT compatible
>>> "ti,omap2-mcasp-audio" to identify version 3 controller.
>>> - The register offsets are handled depending on the version.
>>> - Provide a config option to indicate missing SRAM API support.
>> Could you give some insight which hardware this was tested on? I'm
>> trying to get this up and running on a AM33xx board, and the patches
>> look all reasonable to me. My problem is that I can't make the DMA
>> engine move forward, I fail to receive a single interrupt on this
>> peripheral after the stream starts. I will continue searching for the
>> reason of this tomorrow, but maybe you can give me some hint by
>> explaining your setup?
>> Note that I'm using your patches together with Matt's from this series:
>> ... but it doesn't work without those either.
> When I started working on adding DT support to McASP driver, Matt Porter
> EDMA port was not yet ready.
> 1. I took existing edma driver from AM335x Arago release  (driver + edma
> device init).
> 2. Added this to Vaibhav's Local (linux-next + AM335x patches) tree 
> 3. Added DT support to McASP driver.
> I tested this on AM335x EVM board.
Hmm, so I think there's a tiny bit missing for the EDMA conversion on DT
> If you need the code, I can share it as a patch (I will send the patch as a
> private mail since the patch is huge).
Please do :) Or just push your entire tree somewhere.
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