[ALSA] oxygen: generalize DAC volume TLV handling

Add a pointer for DAC volume TLV data to the model structure so that the
model driver do not need to manually assign it in their control filter.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/oxygen/hifier.c

@@ -127,12 +127,8 @@ static const DECLARE_TLV_DB_LINEAR(ak4396_db_scale, TLV_DB_GAIN_MUTE, 0);
 
 static int hifier_control_filter(struct snd_kcontrol_new *template)
 {
-	if (!strcmp(template->name, "Master Playback Volume")) {
-		template->access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
-		template->tlv.p = ak4396_db_scale;
-	} else if (!strcmp(template->name, "Stereo Upmixing")) {
+	if (!strcmp(template->name, "Stereo Upmixing"))
 		return 1; /* stereo only - we don't need upmixing */
-	}
 	return 0;
 }
 
@@ -148,6 +144,7 @@ static const struct oxygen_model model_hifier = {
 	.set_adc_params = set_cs5340_params,
 	.update_dac_volume = update_ak4396_volume,
 	.update_dac_mute = update_ak4396_mute,
+	.dac_tlv = ak4396_db_scale,
 	.model_data_size = sizeof(struct hifier_data),
 	.pcm_dev_cfg = PLAYBACK_0_TO_I2S |
 		       PLAYBACK_1_TO_SPDIF |

sound/pci/oxygen/oxygen.c

@@ -249,27 +249,18 @@ static void set_ak5385_params(struct oxygen *chip,
 
 static const DECLARE_TLV_DB_LINEAR(ak4396_db_scale, TLV_DB_GAIN_MUTE, 0);
 
-static int ak4396_control_filter(struct snd_kcontrol_new *template)
-{
-	if (!strcmp(template->name, "Master Playback Volume")) {
-		template->access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
-		template->tlv.p = ak4396_db_scale;
-	}
-	return 0;
-}
-
 static const struct oxygen_model model_generic = {
 	.shortname = "C-Media CMI8788",
 	.longname = "C-Media Oxygen HD Audio",
 	.chip = "CMI8788",
 	.owner = THIS_MODULE,
 	.init = generic_init,
-	.control_filter = ak4396_control_filter,
 	.cleanup = generic_cleanup,
 	.set_dac_params = set_ak4396_params,
 	.set_adc_params = set_wm8785_params,
 	.update_dac_volume = update_ak4396_volume,
 	.update_dac_mute = update_ak4396_mute,
+	.dac_tlv = ak4396_db_scale,
 	.model_data_size = sizeof(struct generic_data),
 	.pcm_dev_cfg = PLAYBACK_0_TO_I2S |
 		       PLAYBACK_1_TO_SPDIF |
@@ -291,12 +282,12 @@ static const struct oxygen_model model_meridian = {
 	.chip = "CMI8788",
 	.owner = THIS_MODULE,
 	.init = meridian_init,
-	.control_filter = ak4396_control_filter,
 	.cleanup = generic_cleanup,
 	.set_dac_params = set_ak4396_params,
 	.set_adc_params = set_ak5385_params,
 	.update_dac_volume = update_ak4396_volume,
 	.update_dac_mute = update_ak4396_mute,
+	.dac_tlv = ak4396_db_scale,
 	.model_data_size = sizeof(struct generic_data),
 	.pcm_dev_cfg = PLAYBACK_0_TO_I2S |
 		       PLAYBACK_1_TO_SPDIF |

sound/pci/oxygen/oxygen.h

@@ -100,6 +100,7 @@ struct oxygen_model {
 	void (*gpio_changed)(struct oxygen *chip);
 	void (*ac97_switch)(struct oxygen *chip,
 			    unsigned int reg, unsigned int mute);
+	const unsigned int *dac_tlv;
 	size_t model_data_size;
 	unsigned int pcm_dev_cfg;
 	u8 dac_channels;

sound/pci/oxygen/oxygen_mixer.c

@@ -941,6 +941,11 @@ static int add_controls(struct oxygen *chip,
 			return err;
 		if (err == 1)
 			continue;
+		if (!strcmp(template.name, "Master Playback Volume") &&
+		    chip->model->dac_tlv) {
+			template.tlv.p = chip->model->dac_tlv;
+			template.access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
+		}
 		ctl = snd_ctl_new1(&template, chip);
 		if (!ctl)
 			return -ENOMEM;

sound/pci/oxygen/virtuoso.c

@@ -502,24 +502,16 @@ static const DECLARE_TLV_DB_SCALE(cs4362a_db_scale, -12700, 100, 0);
 
 static int xonar_d2_control_filter(struct snd_kcontrol_new *template)
 {
-	if (!strcmp(template->name, "Master Playback Volume")) {
-		template->access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
-		template->tlv.p = pcm1796_db_scale;
-	} else if (!strncmp(template->name, "CD Capture ", 11)) {
+	if (!strncmp(template->name, "CD Capture ", 11))
 		/* CD in is actually connected to the video in pin */
 		template->private_value ^= AC97_CD ^ AC97_VIDEO;
-	}
 	return 0;
 }
 
 static int xonar_dx_control_filter(struct snd_kcontrol_new *template)
 {
-	if (!strcmp(template->name, "Master Playback Volume")) {
-		template->access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
-		template->tlv.p = cs4362a_db_scale;
-	} else if (!strncmp(template->name, "CD Capture ", 11)) {
+	if (!strncmp(template->name, "CD Capture ", 11))
 		return 1; /* no CD input */
-	}
 	return 0;
 }
 
@@ -547,6 +539,7 @@ static const struct oxygen_model xonar_models[] = {
 		.set_adc_params = set_cs53x1_params,
 		.update_dac_volume = update_pcm1796_volume,
 		.update_dac_mute = update_pcm1796_mute,
+		.dac_tlv = pcm1796_db_scale,
 		.model_data_size = sizeof(struct xonar_data),
 		.pcm_dev_cfg = PLAYBACK_0_TO_I2S |
 			       PLAYBACK_1_TO_SPDIF |
@@ -575,6 +568,7 @@ static const struct oxygen_model xonar_models[] = {
 		.update_dac_volume = update_pcm1796_volume,
 		.update_dac_mute = update_pcm1796_mute,
 		.gpio_changed = xonar_gpio_changed,
+		.dac_tlv = pcm1796_db_scale,
 		.model_data_size = sizeof(struct xonar_data),
 		.pcm_dev_cfg = PLAYBACK_0_TO_I2S |
 			       PLAYBACK_1_TO_SPDIF |
@@ -604,6 +598,7 @@ static const struct oxygen_model xonar_models[] = {
 		.update_dac_mute = update_cs43xx_mute,
 		.gpio_changed = xonar_gpio_changed,
 		.ac97_switch = xonar_dx_ac97_switch,
+		.dac_tlv = cs4362a_db_scale,
 		.model_data_size = sizeof(struct xonar_data),
 		.pcm_dev_cfg = PLAYBACK_0_TO_I2S |
 			       PLAYBACK_1_TO_SPDIF |