Re: [PATCH v2 05/11] ASoC: wcd934x: add playback dapm widgets

On 2019-10-18 02:18, Srinivas Kandagatla wrote:

+static int wcd934x_codec_enable_slim(struct snd_soc_dapm_widget *w,
+				     struct snd_kcontrol *kc,
+				       int event)
+{
+	struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
+	struct wcd934x_codec *wcd = snd_soc_component_get_drvdata(comp);
+	struct wcd_slim_codec_dai_data *dai = &wcd->dai[w->shift];
+
+	switch (event) {
+	case SND_SOC_DAPM_POST_PMU:
+		wcd934x_codec_enable_int_port(dai, comp);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		break;

Any reason for mentioning _TRIGGER_STOP here?

+	case SND_SOC_DAPM_POST_PMD:
+		kfree(dai->sconfig.chs);
+
+		break;

Comment for kfree depending on _event_ would be advised.

+	}
+
+	return 0;
+}
+
+static void wcd934x_codec_hd2_control(struct snd_soc_component *component,
+				      u16 interp_idx, int event)
+{
+	u16 hd2_scale_reg;
+	u16 hd2_enable_reg = 0;
+
+	switch (interp_idx) {
+	case INTERP_HPHL:
+		hd2_scale_reg = WCD934X_CDC_RX1_RX_PATH_SEC3;
+		hd2_enable_reg = WCD934X_CDC_RX1_RX_PATH_CFG0;
+		break;
+	case INTERP_HPHR:
+		hd2_scale_reg = WCD934X_CDC_RX2_RX_PATH_SEC3;
+		hd2_enable_reg = WCD934X_CDC_RX2_RX_PATH_CFG0;
+		break;
+	}

What's the rest of this function for if switch-case does not match?
Without hd2_enable_reg > 0 you might as well return immediately.

+
+	if (hd2_enable_reg && SND_SOC_DAPM_EVENT_ON(event)) {
+		snd_soc_component_update_bits(component, hd2_scale_reg,
+				      WCD934X_CDC_RX_PATH_SEC_HD2_ALPHA_MASK,
+				      WCD934X_CDC_RX_PATH_SEC_HD2_ALPHA_0P3125);
+		snd_soc_component_update_bits(component, hd2_enable_reg,
+				      WCD934X_CDC_RX_PATH_CFG_HD2_EN_MASK,
+				      WCD934X_CDC_RX_PATH_CFG_HD2_ENABLE);
+	}
+
+	if (hd2_enable_reg && SND_SOC_DAPM_EVENT_OFF(event)) {
+		snd_soc_component_update_bits(component, hd2_enable_reg,
+				      WCD934X_CDC_RX_PATH_CFG_HD2_EN_MASK,
+				      WCD934X_CDC_RX_PATH_CFG_HD2_DISABLE);
+		snd_soc_component_update_bits(component, hd2_scale_reg,
+				      WCD934X_CDC_RX_PATH_SEC_HD2_ALPHA_MASK,
+				      WCD934X_CDC_RX_PATH_SEC_HD2_ALPHA_0P0000);
+	}
+}
+
+static void wcd934x_codec_hphdelay_lutbypass(struct snd_soc_component *comp,
+					     u16 interp_idx, int event)
+{
+	u8 hph_dly_mask;
+	u16 hph_lut_bypass_reg = 0;
+	u16 hph_comp_ctrl7 = 0;
+
+	switch (interp_idx) {
+	case INTERP_HPHL:
+		hph_dly_mask = 1;
+		hph_lut_bypass_reg = WCD934X_CDC_TOP_HPHL_COMP_LUT;
+		hph_comp_ctrl7 = WCD934X_CDC_COMPANDER1_CTL7;
+		break;
+	case INTERP_HPHR:
+		hph_dly_mask = 2;
+		hph_lut_bypass_reg = WCD934X_CDC_TOP_HPHR_COMP_LUT;
+		hph_comp_ctrl7 = WCD934X_CDC_COMPANDER2_CTL7;
+		break;
+	default:
+		break;
+	}

'Default' made it here, what was not the case for most of other 
switch-case. Keep code consistent would be appreciated.
Moreover, in the following function "wcd934x_config_compander", you do 
decide to do all the processing directly within switch-case. I see no 
reason why you should not do that here too.

Again, once switch-case fails to find match, the rest of function does 
not do much, really.

+
+	if (hph_lut_bypass_reg && SND_SOC_DAPM_EVENT_ON(event)) {
+		snd_soc_component_update_bits(comp, WCD934X_CDC_CLSH_TEST0,
+					      hph_dly_mask, 0x0);
+		snd_soc_component_update_bits(comp, hph_lut_bypass_reg,
+					      WCD934X_HPH_LUT_BYPASS_MASK,
+					      WCD934X_HPH_LUT_BYPASS_ENABLE);
+	}
+
+	if (hph_lut_bypass_reg && SND_SOC_DAPM_EVENT_OFF(event)) {
+		snd_soc_component_update_bits(comp, WCD934X_CDC_CLSH_TEST0,
+					      hph_dly_mask, hph_dly_mask);
+		snd_soc_component_update_bits(comp, hph_lut_bypass_reg,
+					      WCD934X_HPH_LUT_BYPASS_MASK,
+					      WCD934X_HPH_LUT_BYPASS_DISABLE);
+	}
+}
+
+static int wcd934x_config_compander(struct snd_soc_component *comp,
+				    int interp_n, int event)
+{
+	struct wcd934x_codec *wcd = dev_get_drvdata(comp->dev);
+	int compander;
+	u16 comp_ctl0_reg, rx_path_cfg0_reg;
+
+	/* EAR does not have compander */
+	if (!interp_n)
+		return 0;
+
+	compander = interp_n - 1;
+	if (!wcd->comp_enabled[compander])
+		return 0;
+
+	comp_ctl0_reg = WCD934X_CDC_COMPANDER1_CTL0 + (compander * 8);
+	rx_path_cfg0_reg = WCD934X_CDC_RX1_RX_PATH_CFG0 + (compander * 20);
+
+	switch (event) {
+	case SND_SOC_DAPM_PRE_PMU:
+		/* Enable Compander Clock */
+		snd_soc_component_update_bits(comp, comp_ctl0_reg,
+					      WCD934X_COMP_CLK_EN_MASK,
+					      WCD934X_COMP_CLK_ENABLE);
+		snd_soc_component_update_bits(comp, comp_ctl0_reg,
+					      WCD934X_COMP_SOFT_RST_MASK,
+					      WCD934X_COMP_SOFT_RST_ENABLE);
+		snd_soc_component_update_bits(comp, comp_ctl0_reg,
+					      WCD934X_COMP_SOFT_RST_MASK,
+					      WCD934X_COMP_SOFT_RST_DISABLE);
+		snd_soc_component_update_bits(comp, rx_path_cfg0_reg,
+					      WCD934X_HPH_CMP_EN_MASK,
+					      WCD934X_HPH_CMP_ENABLE);
+		break;
+	case SND_SOC_DAPM_POST_PMD:
+		snd_soc_component_update_bits(comp, rx_path_cfg0_reg,
+					      WCD934X_HPH_CMP_EN_MASK,
+					      WCD934X_HPH_CMP_DISABLE);
+		snd_soc_component_update_bits(comp, comp_ctl0_reg,
+					      WCD934X_COMP_HALT_MASK,
+					      WCD934X_COMP_HALT);
+		snd_soc_component_update_bits(comp, comp_ctl0_reg,
+					      WCD934X_COMP_SOFT_RST_MASK,
+					      WCD934X_COMP_SOFT_RST_ENABLE);
+		snd_soc_component_update_bits(comp, comp_ctl0_reg,
+					      WCD934X_COMP_SOFT_RST_MASK,
+					      WCD934X_COMP_SOFT_RST_DISABLE);
+		snd_soc_component_update_bits(comp, comp_ctl0_reg,
+					      WCD934X_COMP_CLK_EN_MASK, 0x0);
+		snd_soc_component_update_bits(comp, comp_ctl0_reg,
+					      WCD934X_COMP_SOFT_RST_MASK, 0x0);
+		break;
+	}
+
+	return 0;
+}
+
+static int wcd934x_codec_enable_mix_path(struct snd_soc_dapm_widget *w,
+					 struct snd_kcontrol *kc, int event)
+{
+	struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
+	int offset_val = 0;
+	u16 gain_reg, mix_reg;
+	int val = 0;
+
+	gain_reg = WCD934X_CDC_RX0_RX_VOL_MIX_CTL +
+					(w->shift * WCD934X_RX_PATH_CTL_OFFSET);
+	mix_reg = WCD934X_CDC_RX0_RX_PATH_MIX_CTL +
+					(w->shift * WCD934X_RX_PATH_CTL_OFFSET);
+
+	switch (event) {
+	case SND_SOC_DAPM_PRE_PMU:
+		/* Clk enable */
+		snd_soc_component_update_bits(comp, mix_reg,
+					      WCD934X_CDC_RX_MIX_CLK_EN_MASK,
+					      WCD934X_CDC_RX_MIX_CLK_ENABLE);
+		break;
+
+	case SND_SOC_DAPM_POST_PMU:
+		val = snd_soc_component_read32(comp, gain_reg);
+		val += offset_val;
+		snd_soc_component_write(comp, gain_reg, val);
+		break;
+	case SND_SOC_DAPM_POST_PMD:
+		break;

Redundant case?.

+	};
+
+	return 0;
+}
+
+static int wcd934x_codec_set_iir_gain(struct snd_soc_dapm_widget *w,
+				      struct snd_kcontrol *kcontrol, int event)
+{
+	struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
+	int reg = w->reg;
+
+	switch (event) {
+	case SND_SOC_DAPM_POST_PMU:
+		/* B1 GAIN */
+		snd_soc_component_write(comp, reg,
+					snd_soc_component_read32(comp, reg));
+		/* B2 GAIN */
+		reg++;
+		snd_soc_component_write(comp, reg,
+					snd_soc_component_read32(comp, reg));
+		/* B3 GAIN */
+		reg++;
+		snd_soc_component_write(comp, reg,
+					snd_soc_component_read32(comp, reg));
+		/* B4 GAIN */
+		reg++;
+		snd_soc_component_write(comp, reg,
+					snd_soc_component_read32(comp, reg));
+		/* B5 GAIN */
+		reg++;
+		snd_soc_component_write(comp, reg,
+					snd_soc_component_read32(comp, reg));
+		break;
+	default:
+		break;
+	}
+	return 0;

Missing newline before return - based on format of your other functions.

+}
+
+static int wcd934x_codec_enable_main_path(struct snd_soc_dapm_widget *w,
+					  struct snd_kcontrol *kcontrol,
+					int event)
+{
+	struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
+	u16 gain_reg;
+	u32 val;
+
+	gain_reg = WCD934X_CDC_RX0_RX_VOL_CTL + (w->shift *
+						 WCD934X_RX_PATH_CTL_OFFSET);
+
+	switch (event) {
+	case SND_SOC_DAPM_POST_PMU:
+		val = snd_soc_component_read32(comp, gain_reg);
+		snd_soc_component_write(comp, gain_reg, val);
+		break;
+	};

In the function above, "wcd934x_codec_set_iir_gain", you decided against 
declaring local 'val' for storing _read32, though here, only for a 
single use-case, you made a difference. Let's keep it consistent and run 
with one or the other.

Also, is there any value for assigning gain_reg outside of switch-case?

+
+	return 0;
+}

+static int wcd934x_codec_enable_hphl_pa(struct snd_soc_dapm_widget *w,
+					struct snd_kcontrol *kcontrol,
+					int event)
+{
+	struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
+
+	switch (event) {
+	case SND_SOC_DAPM_PRE_PMU:
+		break;

Redundant case.

+	case SND_SOC_DAPM_POST_PMU:
+		/*
+		 * 7ms sleep is required after PA is enabled as per
+		 * HW requirement. If compander is disabled, then
+		 * 20ms delay is needed.
+		 */
+		usleep_range(20000, 20100);
+
+		snd_soc_component_update_bits(comp, WCD934X_HPH_L_TEST,
+					      WCD934X_HPH_OCP_DET_MASK,
+					      WCD934X_HPH_OCP_DET_ENABLE);
+		/* Remove Mute on primary path */
+		snd_soc_component_update_bits(comp, WCD934X_CDC_RX1_RX_PATH_CTL,
+				      WCD934X_RX_PATH_PGA_MUTE_EN_MASK,
+				      0);
+		/* Enable GM3 boost */
+		snd_soc_component_update_bits(comp, WCD934X_HPH_CNP_WG_CTL,
+					      WCD934X_HPH_GM3_BOOST_EN_MASK,
+					      WCD934X_HPH_GM3_BOOST_ENABLE);
+		/* Enable AutoChop timer at the end of power up */
+		snd_soc_component_update_bits(comp,
+				      WCD934X_HPH_NEW_INT_HPH_TIMER1,
+				      WCD934X_HPH_AUTOCHOP_TIMER_EN_MASK,
+				      WCD934X_HPH_AUTOCHOP_TIMER_ENABLE);
+		/* Remove mix path mute */
+		snd_soc_component_update_bits(comp,
+				WCD934X_CDC_RX1_RX_PATH_MIX_CTL,
+				WCD934X_CDC_RX_PGA_MUTE_EN_MASK, 0x00);
+		break;
+	case SND_SOC_DAPM_PRE_PMD:
+		/* Enable DSD Mute before PA disable */
+
+		snd_soc_component_update_bits(comp, WCD934X_HPH_L_TEST,
+					      WCD934X_HPH_OCP_DET_MASK,
+					      WCD934X_HPH_OCP_DET_DISABLE);
+		snd_soc_component_update_bits(comp, WCD934X_CDC_RX1_RX_PATH_CTL,
+					      WCD934X_RX_PATH_PGA_MUTE_EN_MASK,
+					      WCD934X_RX_PATH_PGA_MUTE_ENABLE);
+		snd_soc_component_update_bits(comp,
+					      WCD934X_CDC_RX1_RX_PATH_MIX_CTL,
+					      WCD934X_RX_PATH_PGA_MUTE_EN_MASK,
+					      WCD934X_RX_PATH_PGA_MUTE_ENABLE);
+		break;
+	case SND_SOC_DAPM_POST_PMD:
+		/*
+		 * 5ms sleep is required after PA disable. If compander is
+		 * disabled, then 20ms delay is needed after PA disable.
+		 */
+			usleep_range(20000, 20100);

Superfluous identation.

+		break;
+	};
+
+	return 0;
+}
+
+static int wcd934x_codec_enable_hphr_pa(struct snd_soc_dapm_widget *w,
+					struct snd_kcontrol *kcontrol,
+					int event)
+{
+	struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
+
+	switch (event) {
+	case SND_SOC_DAPM_PRE_PMU:
+		break;

Redundant case.

+	case SND_SOC_DAPM_POST_PMU:
+		/*
+		 * 7ms sleep is required after PA is enabled as per
+		 * HW requirement. If compander is disabled, then
+		 * 20ms delay is needed.
+		 */
+		usleep_range(20000, 20100);