ASoC: cros_ec_codec: extract DMIC EC command from I2S RX

Extract DMIC EC command from I2S RX.  Setting and getting
microphone gains is common features.
Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Acked-By: Benson Leung <bleung@chromium.org>
Link: https://lore.kernel.org/r/20191014180059.03.I93d9c65964f3c30f85a36d228e31150ff1917706@changeidSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/platform/chrome/cros_ec_trace.c

@@ -98,6 +98,7 @@
 	TRACE_SYMBOL(EC_CMD_SB_READ_BLOCK), \
 	TRACE_SYMBOL(EC_CMD_SB_WRITE_BLOCK), \
 	TRACE_SYMBOL(EC_CMD_BATTERY_VENDOR_PARAM), \
+	TRACE_SYMBOL(EC_CMD_EC_CODEC_DMIC), \
 	TRACE_SYMBOL(EC_CMD_EC_CODEC_I2S_RX), \
 	TRACE_SYMBOL(EC_CMD_REBOOT_EC), \
 	TRACE_SYMBOL(EC_CMD_GET_PANIC_INFO), \

include/linux/platform_data/cros_ec_commands.h

@@ -4466,18 +4466,48 @@ enum mkbp_cec_event {
 
 /*****************************************************************************/
 
+/* Commands for DMIC on audio codec. */
+#define EC_CMD_EC_CODEC_DMIC 0x00BC
+
+enum ec_codec_dmic_subcmd {
+	EC_CODEC_DMIC_SET_GAIN = 0x0,
+	EC_CODEC_DMIC_GET_GAIN = 0x1,
+	EC_CODEC_DMIC_SUBCMD_COUNT,
+};
+
+struct __ec_align1 ec_param_ec_codec_dmic_set_gain {
+	uint8_t left;
+	uint8_t right;
+	uint8_t reserved[2];
+};
+
+struct __ec_align4 ec_param_ec_codec_dmic {
+	uint8_t cmd; /* enum ec_codec_dmic_subcmd */
+	uint8_t reserved[3];
+
+	union {
+		struct ec_param_ec_codec_dmic_set_gain
+				set_gain_param;
+	};
+};
+
+struct __ec_align1 ec_response_ec_codec_dmic_get_gain {
+	uint8_t left;
+	uint8_t right;
+};
+
+/*****************************************************************************/
+
 /* Commands for I2S RX on audio codec. */
 
-#define EC_CMD_EC_CODEC_I2S_RX 0x00BC
+#define EC_CMD_EC_CODEC_I2S_RX 0x00BD
 
 enum ec_codec_i2s_rx_subcmd {
 	EC_CODEC_I2S_RX_ENABLE = 0x0,
 	EC_CODEC_I2S_RX_DISABLE = 0x1,
-	EC_CODEC_I2S_RX_SET_GAIN = 0x2,
-	EC_CODEC_I2S_RX_GET_GAIN = 0x3,
-	EC_CODEC_I2S_RX_SET_SAMPLE_DEPTH = 0x4,
-	EC_CODEC_I2S_RX_SET_DAIFMT = 0x5,
-	EC_CODEC_I2S_RX_SET_BCLK = 0x6,
+	EC_CODEC_I2S_RX_SET_SAMPLE_DEPTH = 0x2,
+	EC_CODEC_I2S_RX_SET_DAIFMT = 0x3,
+	EC_CODEC_I2S_RX_SET_BCLK = 0x4,
 	EC_CODEC_I2S_RX_SUBCMD_COUNT,
 };
 
@@ -4521,8 +4551,6 @@ struct __ec_align4 ec_param_ec_codec_i2s_rx {
 	union {
 		struct ec_param_ec_codec_i2s_rx_set_sample_depth
 				set_sample_depth_param;
-		struct ec_param_ec_codec_i2s_rx_set_gain
-				set_gain_param;
 		struct ec_param_ec_codec_i2s_rx_set_daifmt
 				set_daifmt_param;
 		struct ec_param_ec_codec_i2s_rx_set_bclk
@@ -4530,11 +4558,6 @@ struct __ec_align4 ec_param_ec_codec_i2s_rx {
 	};
 };
 
-struct __ec_align1 ec_response_ec_codec_i2s_rx_get_gain {
-	uint8_t left;
-	uint8_t right;
-};
-
 /*****************************************************************************/
 /* System commands */
 

sound/soc/codecs/cros_ec_codec.c

@@ -64,12 +64,12 @@ static int dmic_get_gain(struct snd_kcontrol *kcontrol,
 		snd_soc_kcontrol_component(kcontrol);
 	struct cros_ec_codec_priv *priv =
 		snd_soc_component_get_drvdata(component);
-	struct ec_param_ec_codec_i2s_rx p;
-	struct ec_response_ec_codec_i2s_rx_get_gain r;
+	struct ec_param_ec_codec_dmic p;
+	struct ec_response_ec_codec_dmic_get_gain r;
 	int ret;
 
-	p.cmd = EC_CODEC_I2S_RX_GET_GAIN;
-	ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,
+	p.cmd = EC_CODEC_DMIC_GET_GAIN;
+	ret = send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,
 				   (uint8_t *)&p, sizeof(p),
 				   (uint8_t *)&r, sizeof(r));
 	if (ret < 0)
@@ -93,17 +93,17 @@ static int dmic_put_gain(struct snd_kcontrol *kcontrol,
 	int max_dmic_gain = control->max;
 	int left = ucontrol->value.integer.value[0];
 	int right = ucontrol->value.integer.value[1];
-	struct ec_param_ec_codec_i2s_rx p;
+	struct ec_param_ec_codec_dmic p;
 
 	if (left > max_dmic_gain || right > max_dmic_gain)
 		return -EINVAL;
 
 	dev_dbg(component->dev, "set mic gain to %u, %u\n", left, right);
 
-	p.cmd = EC_CODEC_I2S_RX_SET_GAIN;
+	p.cmd = EC_CODEC_DMIC_SET_GAIN;
 	p.set_gain_param.left = left;
 	p.set_gain_param.right = right;
-	return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_I2S_RX,
+	return send_ec_host_command(priv->ec_device, EC_CMD_EC_CODEC_DMIC,
 				    (uint8_t *)&p, sizeof(p), NULL, 0);
 }
 
@@ -120,6 +120,29 @@ static struct snd_kcontrol_new dmic_controls[] = {
 				   dmic_gain_tlv),
 };
 
+static int dmic_probe(struct snd_soc_component *component)
+{
+	struct cros_ec_codec_priv *priv =
+		snd_soc_component_get_drvdata(component);
+	struct device *dev = priv->dev;
+	int ret, val;
+	struct soc_mixer_control *control;
+
+	ret = device_property_read_u32(dev, "max-dmic-gain", &val);
+	if (ret) {
+		dev_err(dev, "Failed to read 'max-dmic-gain'\n");
+		return ret;
+	}
+
+	control = (struct soc_mixer_control *)
+		dmic_controls[DMIC_CTL_GAIN].private_value;
+	control->max = val;
+	control->platform_max = val;
+
+	return snd_soc_add_component_controls(component,
+			&dmic_controls[DMIC_CTL_GAIN], 1);
+}
+
 static int i2s_rx_hw_params(struct snd_pcm_substream *substream,
 			    struct snd_pcm_hw_params *params,
 			    struct snd_soc_dai *dai)
@@ -265,25 +288,7 @@ static struct snd_soc_dai_driver i2s_rx_dai_driver = {
 
 static int i2s_rx_probe(struct snd_soc_component *component)
 {
-	struct cros_ec_codec_priv *priv =
-		snd_soc_component_get_drvdata(component);
-	struct device *dev = priv->dev;
-	int ret, val;
-	struct soc_mixer_control *control;
-
-	ret = device_property_read_u32(dev, "max-dmic-gain", &val);
-	if (ret) {
-		dev_err(dev, "Failed to read 'max-dmic-gain'\n");
-		return ret;
-	}
-
-	control = (struct soc_mixer_control *)
-			dmic_controls[DMIC_CTL_GAIN].private_value;
-	control->max = val;
-	control->platform_max = val;
-
-	return snd_soc_add_component_controls(component,
-			&dmic_controls[DMIC_CTL_GAIN], 1);
+	return dmic_probe(component);
 }
 
 static const struct snd_soc_component_driver i2s_rx_component_driver = {