[alsa-devel] [PATCH v2 1/3] ARM: shmobile: armadillo800eva: Properly specify HDMI audio link format

[Simon Horman]

On Fri, Jan 30, 2015 at 05:18:56AM +0000, Kuninori Morimoto wrote:
> 
> Hi Lars, Simon
> 
> > The DAI link format should be specified for the whole link rather than just
> > one component on the link. So move the format specification for the HDMI
> > audio link from the CPU component to the link itself.
> > 
> > Since the sh-mobile-hdmi DAI driver doesn't implement the set_fmt() callback
> > in this case there is no functional difference between only specifying the
> > the format for the CPU side or for the whole link, but the later it will
> > allow us to remove support for just specifying the format for one component.
> > 
> > Signed-off-by: Lars-Peter Clausen <lars at metafoo.de>
> > ---
> 
> I tested these 3 patches on armadillo800eva
> 
> 	[PATCH v2 1/3] ARM: shmobile: armadillo800eva: Properly specify HDMI audio link format
> 	[PATCH v2 2/3] ASoC: sh: fsi: Fix clock inversion
> 	[PATCH v2 3/3] ASoC: simple-card: Remove support for setting differing DAI formats
> 
> Tested-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
> 
> 2/3 patch changed behavior for clock inversion on FSI driver.
> FSI + wm8978 on armadillo800eva worked without any issues,
> but, I don't know how much effect it has for other board.
> We used this inversion flags on each board for historical reasons (copy-paste),
> but, almost all these were not needed (except some picky board) on FSI.
> Maybe Lars's 2/3 patch is correct, but, it is difficult to check/confirm for all boards.
> And unfortunately, Renesas don't use FSI anymore.
> So, I think keeping current FSI driver as-is is more safety for old boards.
> armadillo800eva works well with below patch (as 2/3 patch)


Thanks, I am inclined to agree that it is best to leave things unchanged.

> 
> --------------
> diff --git a/arch/arm/mach-shmobile/board-armadillo800eva.c b/arch/arm/mach-shmobile/board-armadillo800eva.c
> index 75de26c..36aaeb1 100644
> --- a/arch/arm/mach-shmobile/board-armadillo800eva.c
> +++ b/arch/arm/mach-shmobile/board-armadillo800eva.c
> @@ -1015,7 +1015,6 @@ static struct asoc_simple_card_info fsi_wm8978_info = {
>         .platform       = "sh_fsi2",
>         .daifmt         = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM,
>         .cpu_dai = {
> -               .fmt    = SND_SOC_DAIFMT_IB_NF,
>                 .name   = "fsia-dai",
>         },
>         .codec_dai = {
> --------------
>