linux-kernel - Re: [PATCH v2 3/6] ASoC: codecs: lpass-wsa-macro: add dapm widgets and route

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Date:   Thu, 29 Oct 2020 10:52:23 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        broonie@...nel.org
Cc:     devicetree@...r.kernel.org, alsa-devel@...a-project.org,
        lgirdwood@...il.com, linux-kernel@...r.kernel.org,
        robh+dt@...nel.org
Subject: Re: [PATCH v2 3/6] ASoC: codecs: lpass-wsa-macro: add dapm widgets
 and route


> +static int wsa_macro_enable_mix_path(struct snd_soc_dapm_widget *w,
> +				     struct snd_kcontrol *kcontrol, int event)
> +{
> +	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
> +	u16 gain_reg;
> +	int offset_val = 0;
> +	int val = 0;
> +
> +	switch (w->reg) {
> +	case CDC_WSA_RX0_RX_PATH_MIX_CTL:
> +		gain_reg = CDC_WSA_RX0_RX_VOL_MIX_CTL;
> +		break;
> +	case CDC_WSA_RX1_RX_PATH_MIX_CTL:
> +		gain_reg = CDC_WSA_RX1_RX_VOL_MIX_CTL;
> +		break;
> +	default:
> +		return 0;
> +	}
> +
> +	switch (event) {
> +	case SND_SOC_DAPM_POST_PMU:
> +		val = snd_soc_component_read(component, gain_reg);
> +		val += offset_val;
> +		snd_soc_component_write(component, gain_reg, val);

missed from v1: offset_val is zero so the sequence is reading and 
writing the same thing. Is this intentional or useful?

> +		break;
> +	case SND_SOC_DAPM_POST_PMD:
> +		snd_soc_component_update_bits(component, w->reg,
> +					      CDC_WSA_RX_PATH_MIX_CLK_EN_MASK,
> +					      CDC_WSA_RX_PATH_MIX_CLK_DISABLE);
> +		break;
> +	}
> +
> +	return 0;
> +}
> +

[...]

> +static bool wsa_macro_adie_lb(struct snd_soc_component *component,
> +			      int interp_idx)
> +{
> +	u16 int_mux_cfg0 = 0, int_mux_cfg1 = 0;

these inits are ignored

> +	u8 int_mux_cfg0_val = 0, int_mux_cfg1_val = 0;

these as well

> +	u8 int_n_inp0 = 0, int_n_inp1 = 0, int_n_inp2 = 0;

and these are also ignored.

> +	int_mux_cfg0 = CDC_WSA_RX_INP_MUX_RX_INT0_CFG0 + interp_idx * 8;
> +	int_mux_cfg1 = int_mux_cfg0 + 4;
> +	int_mux_cfg0_val = snd_soc_component_read(component, int_mux_cfg0);
> +	int_mux_cfg1_val = snd_soc_component_read(component, int_mux_cfg1);
> +
> +	int_n_inp0 = int_mux_cfg0_val & 0x0F;
> +	if (int_n_inp0 == INTn_1_INP_SEL_DEC0 ||
> +		int_n_inp0 == INTn_1_INP_SEL_DEC1)
> +		return true;
> +
> +	int_n_inp1 = int_mux_cfg0_val >> 4;
> +	if (int_n_inp1 == INTn_1_INP_SEL_DEC0 ||
> +		int_n_inp1 == INTn_1_INP_SEL_DEC1)
> +		return true;
> +
> +	int_n_inp2 = int_mux_cfg1_val >> 4;
> +	if (int_n_inp2 == INTn_1_INP_SEL_DEC0 ||
> +		int_n_inp2 == INTn_1_INP_SEL_DEC1)
> +		return true;
> +
> +	return false;
> +}