[alsa-devel] [PATCH 0/3] ASoC: Davinci: McASP: add support new McASP IP Variant

[Hebbar, Gururaja]

On Wed, Oct 03, 2012 at 16:46:39, Daniel Mack wrote:
> 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
> >>>
> >>> Changes
> >>> - 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:
> >>
> >>   https://github.com/ohporter/linux/tree/edma-dmaengine-am33xx-rfc-v1
> >>
> >> ... 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. 
> > 
> > So 
> > 1. I took existing edma driver from AM335x Arago release [1] (driver + edma 
> >    device init). 
> > 2. Added this to Vaibhav's Local (linux-next + AM335x patches) tree [2] 
> > 
> > 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
> kernels.
> 
> > 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.

I have pushed the code at below git repo
Repo :https://github.com/hvaibhav/am335x-linux
Branch : am335x-upstream-staging-audio

This includes 
1. (linux-next + AM335x patches)
2. McASP DT conversion
3. EDMA hack
4. AM335x audio specific DT blobs
5. Am335x dma DT blobs [hack]

Kindly let me know if you need any more details.

> 
> 
> Thanks,
> Daniel
> 
> 


Regards, 
Gururaja