[alsa-devel] [PATCH] ASoC: TWL4030: Add supply for audio serial interface control

[Peter Ujfalusi]

Hello,

On Tuesday 09 February 2010 15:24:04 Ujfalusi Peter (Nokia-D/Tampere) wrote:
> The serial interface (TDM/I2S) for the audio block have been
> constantly enabled.
> Introduce a new DAPM_SUPPLY for handling the AIF_EN bit, so
> the interface is only enabled, when there is a need for it.
> For example when only the analog loopback is enabled, there
> is no need to keep the serial interface active.
> 
> I have added the persons who contributed to the Voice path
> of twl4030 codec driver, so they might have the ability
> to test this patch, and send an update for the Voice path,
> if it is necessary

I meant to place this part after the ---, so this should not be part of the 
commit message. Sorry about that, should I resend it?
Also, it seams that the email address for Misael Lopez at TI is no longer 
active...

-- 
Péter

> 
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi at nokia.com>
> ---
> 
> This patch has been tested in OPTION 1 mode, where the Voice
> path is not in use.
> I have looked for dependencies in the Voice path regarding to
> the Audio interface enable bit, but I have not found any.
> If someone could test, if the Voice path also needs the AIF_EN
> bit set, than please send a patch, which adds this new supply
> to the DAPM rule for the Voice path.
> 
>  sound/soc/codecs/twl4030.c |   14 +++++++++++++-
>  1 files changed, 13 insertions(+), 1 deletions(-)
> 
> diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c
> index b32aeb3..277862e 100644
> --- a/sound/soc/codecs/twl4030.c
> +++ b/sound/soc/codecs/twl4030.c
> @@ -55,7 +55,7 @@ static const u8 twl4030_reg[TWL4030_CACHEREGNUM] = {
>  	0x0c, /* REG_ATXR1PGA		(0xB)	*/
>  	0x00, /* REG_AVTXL2PGA		(0xC)	*/
>  	0x00, /* REG_AVTXR2PGA		(0xD)	*/
> -	0x01, /* REG_AUDIO_IF		(0xE)	*/
> +	0x00, /* REG_AUDIO_IF		(0xE)	*/
>  	0x00, /* REG_VOICE_IF		(0xF)	*/
>  	0x00, /* REG_ARXR1PGA		(0x10)	*/
>  	0x00, /* REG_ARXL1PGA		(0x11)	*/
> @@ -1203,6 +1203,8 @@ static const struct snd_soc_dapm_widget
>  twl4030_dapm_widgets[] = { SND_SOC_DAPM_SUPPLY("APLL Enable",
>  SND_SOC_NOPM, 0, 0, apll_event,
>  SND_SOC_DAPM_PRE_PMU|SND_SOC_DAPM_POST_PMD),
> 
> +	SND_SOC_DAPM_SUPPLY("AIF Enable", TWL4030_REG_AUDIO_IF, 0, 0, NULL, 0),
> +
>  	/* Output MIXER controls */
>  	/* Earpiece */
>  	SND_SOC_DAPM_MIXER("Earpiece Mixer", SND_SOC_NOPM, 0, 0,
> @@ -1337,6 +1339,11 @@ static const struct snd_soc_dapm_route intercon[] =
>  { {"Digital L2 Playback Mixer", NULL, "APLL Enable"},
>  	{"Digital Voice Playback Mixer", NULL, "APLL Enable"},
> 
> +	{"Digital R1 Playback Mixer", NULL, "AIF Enable"},
> +	{"Digital L1 Playback Mixer", NULL, "AIF Enable"},
> +	{"Digital R2 Playback Mixer", NULL, "AIF Enable"},
> +	{"Digital L2 Playback Mixer", NULL, "AIF Enable"},
> +
>  	{"Analog L1 Playback Mixer", NULL, "Digital L1 Playback Mixer"},
>  	{"Analog R1 Playback Mixer", NULL, "Digital R1 Playback Mixer"},
>  	{"Analog L2 Playback Mixer", NULL, "Digital L2 Playback Mixer"},
> @@ -1455,6 +1462,11 @@ static const struct snd_soc_dapm_route intercon[] =
>  { {"ADC Virtual Left2", NULL, "APLL Enable"},
>  	{"ADC Virtual Right2", NULL, "APLL Enable"},
> 
> +	{"ADC Virtual Left1", NULL, "AIF Enable"},
> +	{"ADC Virtual Right1", NULL, "AIF Enable"},
> +	{"ADC Virtual Left2", NULL, "AIF Enable"},
> +	{"ADC Virtual Right2", NULL, "AIF Enable"},
> +
>  	/* Analog bypass routes */
>  	{"Right1 Analog Loopback", "Switch", "Analog Right"},
>  	{"Left1 Analog Loopback", "Switch", "Analog Left"},
>