[ALSA] oxygen: generalize handling of DAC volume limits

Add fields for the DAC volume limits to the module structure so that
model drivers do not need to install their own control info handlers.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/oxygen/hifier.c

@@ -153,6 +153,8 @@ static const struct oxygen_model model_hifier = {
 		       PLAYBACK_1_TO_SPDIF |
 		       CAPTURE_0_FROM_I2S_1,
 	.dac_channels = 2,
+	.dac_volume_min = 0,
+	.dac_volume_max = 255,
 	.function_flags = OXYGEN_FUNCTION_SPI,
 	.dac_i2s_format = OXYGEN_I2S_FORMAT_LJUST,
 	.adc_i2s_format = OXYGEN_I2S_FORMAT_LJUST,

sound/pci/oxygen/oxygen.c

@@ -278,6 +278,8 @@ static const struct oxygen_model model_generic = {
 		       CAPTURE_1_FROM_SPDIF |
 		       CAPTURE_2_FROM_AC97_1,
 	.dac_channels = 8,
+	.dac_volume_min = 0,
+	.dac_volume_max = 255,
 	.function_flags = OXYGEN_FUNCTION_SPI |
 			  OXYGEN_FUNCTION_ENABLE_SPI_4_5,
 	.dac_i2s_format = OXYGEN_I2S_FORMAT_LJUST,
@@ -303,6 +305,8 @@ static const struct oxygen_model model_meridian = {
 		       CAPTURE_1_FROM_SPDIF |
 		       CAPTURE_2_FROM_AC97_1,
 	.dac_channels = 8,
+	.dac_volume_min = 0,
+	.dac_volume_max = 255,
 	.misc_flags = OXYGEN_MISC_MIDI,
 	.function_flags = OXYGEN_FUNCTION_SPI |
 			  OXYGEN_FUNCTION_ENABLE_SPI_4_5,

sound/pci/oxygen/oxygen.h

@@ -103,6 +103,8 @@ struct oxygen_model {
 	size_t model_data_size;
 	unsigned int pcm_dev_cfg;
 	u8 dac_channels;
+	u8 dac_volume_min;
+	u8 dac_volume_max;
 	u8 misc_flags;
 	u8 function_flags;
 	u16 dac_i2s_format;

sound/pci/oxygen/oxygen_lib.c

@@ -221,7 +221,7 @@ static void oxygen_init(struct oxygen *chip)
 
 	chip->dac_routing = 1;
 	for (i = 0; i < 8; ++i)
-		chip->dac_volume[i] = 0xff;
+		chip->dac_volume[i] = chip->model->dac_volume_max;
 	chip->spdif_playback_enable = 1;
 	chip->spdif_bits = OXYGEN_SPDIF_C | OXYGEN_SPDIF_ORIGINAL |
 		(IEC958_AES1_CON_PCM_CODER << OXYGEN_SPDIF_CATEGORY_SHIFT);

sound/pci/oxygen/oxygen_mixer.c

@@ -32,8 +32,8 @@ static int dac_volume_info(struct snd_kcontrol *ctl,
 
 	info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 	info->count = chip->model->dac_channels;
-	info->value.integer.min = 0;
-	info->value.integer.max = 0xff;
+	info->value.integer.min = chip->model->dac_volume_min;
+	info->value.integer.max = chip->model->dac_volume_max;
 	return 0;
 }
 

sound/pci/oxygen/virtuoso.c

@@ -219,10 +219,7 @@ static void xonar_d2x_init(struct oxygen *chip)
 static void xonar_dx_init(struct oxygen *chip)
 {
 	struct xonar_data *data = chip->model_data;
-	unsigned int i;
 
-	for (i = 0; i < 8; ++i)
-		chip->dac_volume[i] = 127;
 	data->anti_pop_delay = 800;
 	data->output_enable_bit = GPIO_DX_OUTPUT_ENABLE;
 	data->ext_power_reg = OXYGEN_GPI_DATA;
@@ -414,26 +411,6 @@ static void xonar_gpio_changed(struct oxygen *chip)
 	}
 }
 
-static int pcm1796_volume_info(struct snd_kcontrol *ctl,
-			       struct snd_ctl_elem_info *info)
-{
-	info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
-	info->count = 8;
-	info->value.integer.min = 0x0f;
-	info->value.integer.max = 0xff;
-	return 0;
-}
-
-static int cs4362a_volume_info(struct snd_kcontrol *ctl,
-			       struct snd_ctl_elem_info *info)
-{
-	info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
-	info->count = 8;
-	info->value.integer.min = 0;
-	info->value.integer.max = 127;
-	return 0;
-}
-
 static int alt_switch_get(struct snd_kcontrol *ctl,
 			  struct snd_ctl_elem_value *value)
 {
@@ -526,7 +503,6 @@ 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->info = pcm1796_volume_info;
 		template->tlv.p = pcm1796_db_scale;
 	} else if (!strncmp(template->name, "CD Capture ", 11)) {
 		/* CD in is actually connected to the video in pin */
@@ -539,7 +515,6 @@ 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->info = cs4362a_volume_info;
 		template->tlv.p = cs4362a_db_scale;
 	} else if (!strncmp(template->name, "CD Capture ", 11)) {
 		return 1; /* no CD input */
@@ -577,6 +552,8 @@ static const struct oxygen_model xonar_models[] = {
 			       CAPTURE_0_FROM_I2S_2 |
 			       CAPTURE_1_FROM_SPDIF,
 		.dac_channels = 8,
+		.dac_volume_min = 0x0f,
+		.dac_volume_max = 0xff,
 		.misc_flags = OXYGEN_MISC_MIDI,
 		.function_flags = OXYGEN_FUNCTION_SPI |
 				  OXYGEN_FUNCTION_ENABLE_SPI_4_5,
@@ -603,6 +580,8 @@ static const struct oxygen_model xonar_models[] = {
 			       CAPTURE_0_FROM_I2S_2 |
 			       CAPTURE_1_FROM_SPDIF,
 		.dac_channels = 8,
+		.dac_volume_min = 0x0f,
+		.dac_volume_max = 0xff,
 		.misc_flags = OXYGEN_MISC_MIDI,
 		.function_flags = OXYGEN_FUNCTION_SPI |
 				  OXYGEN_FUNCTION_ENABLE_SPI_4_5,
@@ -629,6 +608,8 @@ static const struct oxygen_model xonar_models[] = {
 			       PLAYBACK_1_TO_SPDIF |
 			       CAPTURE_0_FROM_I2S_2,
 		.dac_channels = 8,
+		.dac_volume_min = 0,
+		.dac_volume_max = 127,
 		.function_flags = OXYGEN_FUNCTION_2WIRE,
 		.dac_i2s_format = OXYGEN_I2S_FORMAT_LJUST,
 		.adc_i2s_format = OXYGEN_I2S_FORMAT_LJUST,