[alsa-devel] [PATCH 1/4] ASoC: pxa-ssp: enhance I2S and add Left_J support

[Daniel Mack]

On Wed, Jun 03, 2009 at 08:33:42PM +0800, Eric Miao wrote:
> Make the pxa I2S configuration generic, add support for Left_J, add
> support for variable frame width like 32fs, 48fs, 64fs and 96fs
> 
> Signed-off-by: Paul Shen <bshen9 at marvell.com>
> Signed-off-by: Eric Miao <eric.miao at marvell.com>
> Cc: Daniel Mack <daniel at caiaq.de>
> ---
>  arch/arm/mach-pxa/include/mach/regs-ssp.h |   14 +++---
>  sound/soc/pxa/pxa-ssp.c                   |   62 ++++++++++++++--------------
>  sound/soc/pxa/pxa-ssp.h                   |    9 ++++
>  3 files changed, 47 insertions(+), 38 deletions(-)

Ok, I tried that code on my board and this is what I had to change
there:

The tdm time slot configuration needs to be set again in my board support
code just like in your example: snd_soc_set_tdm_slot(cpu_dai, 3, 2). And
the PXA_SSP_DIV_SCR value needed to be doubled from 4 to 8.

With that changes, LRCLK is 44100Hz when configured to 44100Hz. But the
bitclk is not 64fs anymore but 32fs only (1.41Mhz). Is there any
implementation details I miss? What does your codec clock config look
like?

Another small thing:

  CC      sound/soc/pxa/pxa-ssp.o
  sound/soc/pxa/pxa-ssp.c:186: warning: 'ssp_get_scr' defined but not used
 
Daniel