ALSA: hda - Create "Input Source" control dynamically for STAC/IDT

Instead of fixed kcontrol_new element, build "Input Source" controls
dynamically.  If the number of input-source items is 0 or 1, we don't
need to create such a control.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index b3c3a02..80a4c28 100644 (file)
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -958,16 +958,6 @@ static struct hda_verb stac9205_core_init[] = {
                .private_value = HDA_COMPOSE_AMP_VAL(nid, chs, idx, dir) \
        }
 
-#define STAC_INPUT_SOURCE(cnt) \
-       { \
-               .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
-               .name = "Input Source", \
-               .count = cnt, \
-               .info = stac92xx_mux_enum_info, \
-               .get = stac92xx_mux_enum_get, \
-               .put = stac92xx_mux_enum_put, \
-       }
-
 #define STAC_ANALOG_LOOPBACK(verb_read, verb_write, cnt) \
        { \
                .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
@@ -982,7 +972,6 @@ static struct hda_verb stac9205_core_init[] = {
 static struct snd_kcontrol_new stac9200_mixer[] = {
        HDA_CODEC_VOLUME("Master Playback Volume", 0xb, 0, HDA_OUTPUT),
        HDA_CODEC_MUTE("Master Playback Switch", 0xb, 0, HDA_OUTPUT),
-       STAC_INPUT_SOURCE(1),
        HDA_CODEC_VOLUME("Capture Volume", 0x0a, 0, HDA_OUTPUT),
        HDA_CODEC_MUTE("Capture Switch", 0x0a, 0, HDA_OUTPUT),
        { } /* end */
@@ -1098,7 +1087,6 @@ static struct snd_kcontrol_new stac92hd83xxx_mixer[] = {
 };
 
 static struct snd_kcontrol_new stac92hd71bxx_analog_mixer[] = {
-       STAC_INPUT_SOURCE(2),
        STAC_ANALOG_LOOPBACK(0xFA0, 0x7A0, 2),
 
        HDA_CODEC_VOLUME_IDX("Capture Volume", 0x0, 0x1c, 0x0, HDA_OUTPUT),
@@ -1127,7 +1115,6 @@ static struct snd_kcontrol_new stac92hd71bxx_analog_mixer[] = {
 };
 
 static struct snd_kcontrol_new stac92hd71bxx_mixer[] = {
-       STAC_INPUT_SOURCE(2),
        STAC_ANALOG_LOOPBACK(0xFA0, 0x7A0, 2),
 
        HDA_CODEC_VOLUME_IDX("Capture Volume", 0x0, 0x1c, 0x0, HDA_OUTPUT),
@@ -1141,14 +1128,12 @@ static struct snd_kcontrol_new stac92hd71bxx_mixer[] = {
 static struct snd_kcontrol_new stac925x_mixer[] = {
        HDA_CODEC_VOLUME("Master Playback Volume", 0x0e, 0, HDA_OUTPUT),
        HDA_CODEC_MUTE("Master Playback Switch", 0x0e, 0, HDA_OUTPUT),
-       STAC_INPUT_SOURCE(1),
        HDA_CODEC_VOLUME("Capture Volume", 0x09, 0, HDA_OUTPUT),
        HDA_CODEC_MUTE("Capture Switch", 0x14, 0, HDA_OUTPUT),
        { } /* end */
 };
 
 static struct snd_kcontrol_new stac9205_mixer[] = {
-       STAC_INPUT_SOURCE(2),
        STAC_ANALOG_LOOPBACK(0xFE0, 0x7E0, 1),
 
        HDA_CODEC_VOLUME_IDX("Capture Volume", 0x0, 0x1b, 0x0, HDA_INPUT),
@@ -1161,7 +1146,6 @@ static struct snd_kcontrol_new stac9205_mixer[] = {
 
 /* This needs to be generated dynamically based on sequence */
 static struct snd_kcontrol_new stac922x_mixer[] = {
-       STAC_INPUT_SOURCE(2),
        HDA_CODEC_VOLUME_IDX("Capture Volume", 0x0, 0x17, 0x0, HDA_INPUT),
        HDA_CODEC_MUTE_IDX("Capture Switch", 0x0, 0x17, 0x0, HDA_INPUT),
 
@@ -1172,7 +1156,6 @@ static struct snd_kcontrol_new stac922x_mixer[] = {
 
 
 static struct snd_kcontrol_new stac927x_mixer[] = {
-       STAC_INPUT_SOURCE(3),
        STAC_ANALOG_LOOPBACK(0xFEB, 0x7EB, 1),
 
        HDA_CODEC_VOLUME_IDX("Capture Volume", 0x0, 0x18, 0x0, HDA_INPUT),
@@ -2777,22 +2760,37 @@ static struct snd_kcontrol_new stac92xx_control_templates[] = {
 };
 
 /* add dynamic controls */
-static int stac92xx_add_control_temp(struct sigmatel_spec *spec,
-                                    struct snd_kcontrol_new *ktemp,
-                                    int idx, const char *name,
-                                    unsigned long val)
+static struct snd_kcontrol_new *
+stac_control_new(struct sigmatel_spec *spec,
+                struct snd_kcontrol_new *ktemp,
+                const char *name)
 {
        struct snd_kcontrol_new *knew;
 
        snd_array_init(&spec->kctls, sizeof(*knew), 32);
        knew = snd_array_new(&spec->kctls);
        if (!knew)
-               return -ENOMEM;
+               return NULL;
        *knew = *ktemp;
-       knew->index = idx;
        knew->name = kstrdup(name, GFP_KERNEL);
-       if (!knew->name)
+       if (!knew->name) {
+               /* roolback */
+               memset(knew, 0, sizeof(*knew));
+               spec->kctls.alloced--;
+               return NULL;
+       }
+       return knew;
+}
+
+static int stac92xx_add_control_temp(struct sigmatel_spec *spec,
+                                    struct snd_kcontrol_new *ktemp,
+                                    int idx, const char *name,
+                                    unsigned long val)
+{
+       struct snd_kcontrol_new *knew = stac_control_new(spec, ktemp, name);
+       if (!knew)
                return -ENOMEM;
+       knew->index = idx;
        knew->private_value = val;
        return 0;
 }
@@ -2814,6 +2812,29 @@ static inline int stac92xx_add_control(struct sigmatel_spec *spec, int type,
        return stac92xx_add_control_idx(spec, type, 0, name, val);
 }
 
+static struct snd_kcontrol_new stac_input_src_temp = {
+       .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+       .name = "Input Source",
+       .info = stac92xx_mux_enum_info,
+       .get = stac92xx_mux_enum_get,
+       .put = stac92xx_mux_enum_put,
+};
+
+static int stac92xx_add_input_source(struct sigmatel_spec *spec)
+{
+       struct snd_kcontrol_new *knew;
+       struct hda_input_mux *imux = &spec->private_imux;
+
+       if (!spec->num_adcs || imux->num_items <= 1)
+               return 0; /* no need for input source control */
+       knew = stac_control_new(spec, &stac_input_src_temp,
+                               stac_input_src_temp.name);
+       if (!knew)
+               return -ENOMEM;
+       knew->count = spec->num_adcs;
+       return 0;
+}
+
 /* check whether the line-input can be used as line-out */
 static hda_nid_t check_line_out_switch(struct hda_codec *codec)
 {
@@ -3699,6 +3720,10 @@ static int stac92xx_parse_auto_config(struct hda_codec *codec, hda_nid_t dig_out
                        return err;
        }
 
+       err = stac92xx_add_input_source(spec);
+       if (err < 0)
+               return err;
+
        spec->multiout.max_channels = spec->multiout.num_dacs * 2;
        if (spec->multiout.max_channels > 2)
                spec->surr_switch = 1;
@@ -3812,6 +3837,10 @@ static int stac9200_parse_auto_config(struct hda_codec *codec)
                        return err;
        }
 
+       err = stac92xx_add_input_source(spec);
+       if (err < 0)
+               return err;
+
        if (spec->autocfg.dig_out_pin)
                spec->multiout.dig_out_nid = 0x05;
        if (spec->autocfg.dig_in_pin)
@@ -5426,7 +5455,6 @@ static struct hda_verb stac9872_core_init[] = {
 static struct snd_kcontrol_new stac9872_mixer[] = {
        HDA_CODEC_VOLUME("Capture Volume", 0x09, 0, HDA_INPUT),
        HDA_CODEC_MUTE("Capture Switch", 0x09, 0, HDA_INPUT),
-       STAC_INPUT_SOURCE(1),
        { } /* end */
 };