[0/5] ASoC: ti: davinci-mcasp: Fix the DIT mode and OMAP4 support

Hi,

it has been on my todo list for several years to support McASP on OMAP4 devices.
For Galaxy Nexus we had an omap-mcasp driver (which was mostly a stripped down
davinci-mcasp driver) to support what was needed on that specific phone + it's
dock for S/PDIF (48KHz, 16bit, stereo).

Not many (if any) device available to test the DIT mode of McASP.
I have used BeagleBone White (McASP1 AXR3 can be routed to a pin) to get the
S/PDIF mode working then PandaES for OMAP4 support (on PandaES the gpio_121 is
not used and the signal is routed to expansion J6 pin14)

In theory the McASP in OMAP5 should be working after this series, but the OMAP5
TRM is not public and I do not have one to check the addresses and see if there
is a way to test it on omap5-uevm.

Mark, Tony:
The ASoC and dts patches can go via separate tree I felt that it is better if
they are together, at least initially.

Nikolaus: fyi, this might be useful for Pyra?

Regards,
Péter
---
Peter Ujfalusi (5):
  ASoC: ti: davinci-mcasp: Fix DIT mode support
  ASoC: dt-bindings: davinci-mcasp: Add compatible string for OMAP4
  ASoC: ti: davinci-mcasp: Add support for the OMAP4 version of McASP
  ARM: dts: omap4-l4-abe: Correct sidle modes for McASP
  ARM: dts: omap4-l4-abe: Add McASP configuration

 .../bindings/sound/davinci-mcasp-audio.txt    |   1 +
 arch/arm/boot/dts/omap4-l4-abe.dtsi           |  39 ++--
 include/linux/platform_data/davinci_asp.h     |   1 +
 sound/soc/ti/Kconfig                          |   1 +
 sound/soc/ti/davinci-mcasp.c                  | 168 +++++++++++++++---
 5 files changed, 168 insertions(+), 42 deletions(-)

Hi Péter,

> Am 04.07.2021 um 17:04 schrieb Peter Ujfalusi <peter.ujfalusi@gmail.com>:
> 
> Hi,
> 
> it has been on my todo list for several years to support McASP on OMAP4 devices.
> For Galaxy Nexus we had an omap-mcasp driver (which was mostly a stripped down
> davinci-mcasp driver) to support what was needed on that specific phone + it's
> dock for S/PDIF (48KHz, 16bit, stereo).
> 
> Not many (if any) device available to test the DIT mode of McASP.
> I have used BeagleBone White (McASP1 AXR3 can be routed to a pin) to get the
> S/PDIF mode working then PandaES for OMAP4 support (on PandaES the gpio_121 is
> not used and the signal is routed to expansion J6 pin14)
> 
> In theory the McASP in OMAP5 should be working after this series, but the OMAP5
> TRM is not public and I do not have one to check the addresses and see if there
> is a way to test it on omap5-uevm.
> 
> Mark, Tony:
> The ASoC and dts patches can go via separate tree I felt that it is better if
> they are together, at least initially.
> 
> Nikolaus: fyi, this might be useful for Pyra?

Yes, definitively.

I just wonder how compatible it is with the "old" omap-mcasp driver we carry
along for the Pyra:

https://git.goldelico.com/?p=letux-kernel.git;a=blob;f=sound/soc/ti/omap-mcasp.c;h=24d839a24f34ec02456176744d3690016592b5a3;hb=7789ab635e56a2fd9fe04ca2e9ccfeaccb8e0f52

Does it now have additional functionality or robustness?
And does it need changes of the OMAP5 device tree?

And also important seems to be the ABE/AESS integration where we so far failed
to make it work again on more recent kernels. Our most recent patch set is here:

https://git.goldelico.com/?p=letux-kernel.git;a=shortlog;h=refs/heads/letux/aess-v5

Anyways I am happy to see a little progress on the omap4/5 audio subsystem.

BR and thanks,
Nikolaus



> 
> Regards,
> Péter
> ---
> Peter Ujfalusi (5):
>  ASoC: ti: davinci-mcasp: Fix DIT mode support
>  ASoC: dt-bindings: davinci-mcasp: Add compatible string for OMAP4
>  ASoC: ti: davinci-mcasp: Add support for the OMAP4 version of McASP
>  ARM: dts: omap4-l4-abe: Correct sidle modes for McASP
>  ARM: dts: omap4-l4-abe: Add McASP configuration
> 
> .../bindings/sound/davinci-mcasp-audio.txt    |   1 +
> arch/arm/boot/dts/omap4-l4-abe.dtsi           |  39 ++--
> include/linux/platform_data/davinci_asp.h     |   1 +
> sound/soc/ti/Kconfig                          |   1 +
> sound/soc/ti/davinci-mcasp.c                  | 168 +++++++++++++++---
> 5 files changed, 168 insertions(+), 42 deletions(-)
> 
> -- 
> 2.32.0
>