[alsa-devel] [PATCH 1/2] ALSA: virtuoso: add de-emphasis control

[Takashi Iwai]

On Thu, 03 Jan 2019 13:37:26 +0100,
tom.ty89 at gmail.com wrote:
> 
> From: Tom Yan <tom.ty89 at gmail.com>
> 
> Add control for the de-emphasis filter in the PCM179x DACs
> 
> Signed-off-by: Tom Yan <tom.ty89 at gmail.com>

Is this just a resend of the previous same patch?

The patches are already tracked for post-4.21 material, so they'll be
merged after 4.21-rc1 release.  Just be patient for a while.


thanks,

Takashi

> 
> diff --git a/sound/pci/oxygen/pcm1796.h b/sound/pci/oxygen/pcm1796.h
> index 34d07dd2d22e..d5dcb09e44cd 100644
> --- a/sound/pci/oxygen/pcm1796.h
> +++ b/sound/pci/oxygen/pcm1796.h
> @@ -10,7 +10,6 @@
>  #define PCM1796_MUTE		0x01
>  #define PCM1796_DME		0x02
>  #define PCM1796_DMF_MASK	0x0c
> -#define PCM1796_DMF_DISABLED	0x00
>  #define PCM1796_DMF_48		0x04
>  #define PCM1796_DMF_441		0x08
>  #define PCM1796_DMF_32		0x0c
> diff --git a/sound/pci/oxygen/xonar_pcm179x.c b/sound/pci/oxygen/xonar_pcm179x.c
> index 24109d37ca09..a1c6b98b191e 100644
> --- a/sound/pci/oxygen/xonar_pcm179x.c
> +++ b/sound/pci/oxygen/xonar_pcm179x.c
> @@ -331,7 +331,7 @@ static void pcm1796_init(struct oxygen *chip)
>  	struct xonar_pcm179x *data = chip->model_data;
>  
>  	data->pcm1796_regs[0][18 - PCM1796_REG_BASE] =
> -		PCM1796_DMF_DISABLED | PCM1796_FMT_24_I2S | PCM1796_ATLD;
> +		PCM1796_FMT_24_I2S | PCM1796_ATLD;
>  	if (!data->broken_i2c)
>  		data->pcm1796_regs[0][18 - PCM1796_REG_BASE] |= PCM1796_MUTE;
>  	data->pcm1796_regs[0][19 - PCM1796_REG_BASE] =
> @@ -621,6 +621,23 @@ static void update_pcm1796_oversampling(struct oxygen *chip)
>  		pcm1796_write_cached(chip, i, 20, reg);
>  }
>  
> +static void update_pcm1796_deemph(struct oxygen *chip)
> +{
> +	struct xonar_pcm179x *data = chip->model_data;
> +	unsigned int i;
> +	u8 reg;
> +
> +	reg = data->pcm1796_regs[0][18 - PCM1796_REG_BASE] & ~PCM1796_DMF_MASK;
> +	if (data->current_rate == 48000)
> +		reg |= PCM1796_DMF_48;
> +	else if (data->current_rate == 44100)
> +		reg |= PCM1796_DMF_441;
> +	else if (data->current_rate == 32000)
> +		reg |= PCM1796_DMF_32;
> +	for (i = 0; i < data->dacs; ++i)
> +		pcm1796_write_cached(chip, i, 18, reg);
> +}
> +
>  static void set_pcm1796_params(struct oxygen *chip,
>  			       struct snd_pcm_hw_params *params)
>  {
> @@ -629,6 +646,7 @@ static void set_pcm1796_params(struct oxygen *chip,
>  	msleep(1);
>  	data->current_rate = params_rate(params);
>  	update_pcm1796_oversampling(chip);
> +	update_pcm1796_deemph(chip);
>  }
>  
>  static void update_pcm1796_volume(struct oxygen *chip)
> @@ -653,9 +671,11 @@ static void update_pcm1796_mute(struct oxygen *chip)
>  	unsigned int i;
>  	u8 value;
>  
> -	value = PCM1796_DMF_DISABLED | PCM1796_FMT_24_I2S | PCM1796_ATLD;
> +	value = data->pcm1796_regs[0][18 - PCM1796_REG_BASE];
>  	if (chip->dac_mute)
>  		value |= PCM1796_MUTE;
> +	else
> +		value &= ~PCM1796_MUTE;
>  	for (i = 0; i < data->dacs; ++i)
>  		pcm1796_write_cached(chip, i, 18, value);
>  }
> @@ -777,6 +797,49 @@ static const struct snd_kcontrol_new rolloff_control = {
>  	.put = rolloff_put,
>  };
>  
> +static int deemph_get(struct snd_kcontrol *ctl,
> +		       struct snd_ctl_elem_value *value)
> +{
> +	struct oxygen *chip = ctl->private_data;
> +	struct xonar_pcm179x *data = chip->model_data;
> +
> +	value->value.integer.value[0] =
> +		!!(data->pcm1796_regs[0][18 - PCM1796_REG_BASE] & PCM1796_DME);
> +	return 0;
> +}
> +
> +static int deemph_put(struct snd_kcontrol *ctl,
> +		       struct snd_ctl_elem_value *value)
> +{
> +	struct oxygen *chip = ctl->private_data;
> +	struct xonar_pcm179x *data = chip->model_data;
> +	unsigned int i;
> +	int changed;
> +	u8 reg;
> +
> +	mutex_lock(&chip->mutex);
> +	reg = data->pcm1796_regs[0][18 - PCM1796_REG_BASE];
> +	if (!value->value.integer.value[0])
> +		reg &= ~PCM1796_DME;
> +	else
> +		reg |= PCM1796_DME;
> +	changed = reg != data->pcm1796_regs[0][18 - PCM1796_REG_BASE];
> +	if (changed) {
> +		for (i = 0; i < data->dacs; ++i)
> +			pcm1796_write(chip, i, 18, reg);
> +	}
> +	mutex_unlock(&chip->mutex);
> +	return changed;
> +}
> +
> +static const struct snd_kcontrol_new deemph_control = {
> +	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
> +	.name = "De-emphasis Playback Switch",
> +	.info = snd_ctl_boolean_mono_info,
> +	.get = deemph_get,
> +	.put = deemph_put,
> +};
> +
>  static const struct snd_kcontrol_new hdav_hdmi_control = {
>  	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
>  	.name = "HDMI Playback Switch",
> @@ -1011,6 +1074,10 @@ static int add_pcm1796_controls(struct oxygen *chip)
>  				  snd_ctl_new1(&rolloff_control, chip));
>  		if (err < 0)
>  			return err;
> +		err = snd_ctl_add(chip->card,
> +				  snd_ctl_new1(&deemph_control, chip));
> +		if (err < 0)
> +			return err;
>  	}
>  	return 0;
>  }
> -- 
> 2.20.1
>