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

[Yegor Yefremov]

On Wed, Oct 3, 2012 at 2:57 PM, Hebbar, Gururaja <gururaja.hebbar at ti.com> wrote:
> 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.

What can be expected in 3.8? And what will have to wait for 3.9?

Yegor