[ALSA] oxygen: add control filter to model struct

Allow the models to modify mixer controls before they are added to the
card.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/pci/oxygen/oxygen.c

@@ -29,6 +29,7 @@
  */
 
 #include <linux/pci.h>
+#include <sound/control.h>
 #include <sound/core.h>
 #include <sound/initval.h>
 #include <sound/pcm.h>
@@ -244,18 +245,27 @@ 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,
 	.used_channels = OXYGEN_CHANNEL_A |
 			 OXYGEN_CHANNEL_C |
 			 OXYGEN_CHANNEL_SPDIF |
@@ -269,12 +279,12 @@ 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,
 	.used_channels = OXYGEN_CHANNEL_B |
 			 OXYGEN_CHANNEL_C |
 			 OXYGEN_CHANNEL_SPDIF |

sound/pci/oxygen/oxygen.h

@@ -35,6 +35,7 @@ struct pci_dev;
 struct snd_card;
 struct snd_pcm_substream;
 struct snd_pcm_hw_params;
+struct snd_kcontrol_new;
 struct snd_rawmidi;
 struct oxygen_model;
 
@@ -71,6 +72,7 @@ struct oxygen_model {
 	const char *chip;
 	struct module *owner;
 	void (*init)(struct oxygen *chip);
+	int (*control_filter)(struct snd_kcontrol_new *template);
 	int (*mixer_init)(struct oxygen *chip);
 	void (*cleanup)(struct oxygen *chip);
 	void (*set_dac_params)(struct oxygen *chip,
@@ -79,10 +81,7 @@ struct oxygen_model {
 			       struct snd_pcm_hw_params *params);
 	void (*update_dac_volume)(struct oxygen *chip);
 	void (*update_dac_mute)(struct oxygen *chip);
-	const unsigned int *dac_tlv;
 	u8 used_channels;
-	u8 cd_in_from_video_in;
-	u8 dac_minimum_volume;
 	u8 function_flags;
 };
 

sound/pci/oxygen/oxygen_mixer.c

@@ -27,11 +27,9 @@
 static int dac_volume_info(struct snd_kcontrol *ctl,
 			   struct snd_ctl_elem_info *info)
 {
-	struct oxygen *chip = ctl->private_data;
-
 	info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 	info->count = 8;
-	info->value.integer.min = chip->model->dac_minimum_volume;
+	info->value.integer.min = 0;
 	info->value.integer.max = 0xff;
 	return 0;
 }
@@ -525,14 +523,10 @@ static const struct snd_kcontrol_new controls[] = {
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 		.name = "Master Playback Volume",
-		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
-			  SNDRV_CTL_ELEM_ACCESS_TLV_READ,
+		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 		.info = dac_volume_info,
 		.get = dac_volume_get,
 		.put = dac_volume_put,
-		.tlv = {
-			.p = NULL, /* set later */
-		},
 	},
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
@@ -635,18 +629,18 @@ static int add_controls(struct oxygen *chip,
 		[CONTROL_AUX_CAPTURE_SWITCH] = "Aux Capture Switch",
 	};
 	unsigned int i, j;
+	struct snd_kcontrol_new template;
 	struct snd_kcontrol *ctl;
 	int err;
 
 	for (i = 0; i < count; ++i) {
+		template = controls[i];
+		err = chip->model->control_filter(&template);
+		if (err < 0)
+			return err;
 		ctl = snd_ctl_new1(&controls[i], chip);
 		if (!ctl)
 			return -ENOMEM;
-		if (!strcmp(ctl->id.name, "Master Playback Volume"))
-			ctl->tlv.p = chip->model->dac_tlv;
-		else if (chip->model->cd_in_from_video_in &&
-			 !strncmp(ctl->id.name, "CD Capture ", 11))
-			ctl->private_value ^= AC97_CD ^ AC97_VIDEO;
 		err = snd_ctl_add(chip->card, ctl);
 		if (err < 0)
 			return err;

sound/pci/oxygen/virtuoso.c

@@ -32,6 +32,8 @@
 
 #include <linux/pci.h>
 #include <linux/delay.h>
+#include <linux/mutex.h>
+#include <sound/ac97_codec.h>
 #include <sound/control.h>
 #include <sound/core.h>
 #include <sound/initval.h>
@@ -167,6 +169,16 @@ static void set_cs5381_params(struct oxygen *chip,
 	oxygen_write16_masked(chip, OXYGEN_GPIO_DATA, value, 0x000c);
 }
 
+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 alt_switch_get(struct snd_kcontrol *ctl,
 			  struct snd_ctl_elem_value *value)
 {
@@ -207,6 +219,18 @@ static const struct snd_kcontrol_new alt_switch = {
 
 static const DECLARE_TLV_DB_SCALE(pcm1796_db_scale, -12000, 50, 0);
 
+static int xonar_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)) {
+		template->private_value ^= AC97_CD ^ AC97_VIDEO;
+	}
+	return 0;
+}
+
 static int xonar_mixer_init(struct oxygen *chip)
 {
 	return snd_ctl_add(chip->card, snd_ctl_new1(&alt_switch, chip));
@@ -217,19 +241,17 @@ static const struct oxygen_model model_xonar = {
 	.longname = "Asus Virtuoso 200",
 	.chip = "AV200",
 	.init = xonar_init,
+	.control_filter = xonar_control_filter,
 	.mixer_init = xonar_mixer_init,
 	.cleanup = xonar_cleanup,
 	.set_dac_params = set_pcm1796_params,
 	.set_adc_params = set_cs5381_params,
 	.update_dac_volume = update_pcm1796_volume,
 	.update_dac_mute = update_pcm1796_mute,
-	.dac_tlv = pcm1796_db_scale,
 	.used_channels = OXYGEN_CHANNEL_B |
 			 OXYGEN_CHANNEL_C |
 			 OXYGEN_CHANNEL_SPDIF |
 			 OXYGEN_CHANNEL_MULTICH,
-	.cd_in_from_video_in = 1,
-	.dac_minimum_volume = 15,
 	.function_flags = OXYGEN_FUNCTION_ENABLE_SPI_4_5,
 };