ALSA: hda - Add digital beep playback switch for STAC/IDT codecs

The digital beep widget may have no mute control, and always enabling
the beep is ofen pretty annoying, especially on laptops.

This patch adds a mixer control "PC Beep Playback Switch" when there
is no mixer amp mute is found, and controls it on software.

Reference: Novell bnc#444572
	https://bugzilla.novell.com/show_bug.cgi?id=444572

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

3 files changed, 68 insertions, 6 deletions

diff --git a/sound/pci/hda/hda_beep.c b/sound/pci/hda/hda_beep.c
index 9b77b3e0fa98..b1796ae1e8fb 100644
--- a/sound/pci/hda/hda_beep.c
+++ b/sound/pci/hda/hda_beep.c
@@ -37,6 +37,9 @@ static void snd_hda_generate_beep(struct work_struct *work)
                 container_of(work, struct hda_beep, beep_work);
         struct hda_codec *codec = beep->codec;
 
+        if (!beep->enabled)
+                return;
+
         /* generate tone */
         snd_hda_codec_write_cache(codec, beep->nid, 0,
                         AC_VERB_SET_BEEP_CONTROL, beep->tone);
@@ -115,6 +118,7 @@ int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
         beep->nid = nid;
         beep->dev = input_dev;
         beep->codec = codec;
+        beep->enabled = 1;
         codec->beep = beep;
 
         INIT_WORK(&beep->beep_work, &snd_hda_generate_beep);
diff --git a/sound/pci/hda/hda_beep.h b/sound/pci/hda/hda_beep.h
index de4036e6e710..b9679f081cae 100644
--- a/sound/pci/hda/hda_beep.h
+++ b/sound/pci/hda/hda_beep.h
@@ -31,6 +31,7 @@ struct hda_beep {
         char phys[32];
         int tone;
         int nid;
+        int enabled;
         struct work_struct beep_work; /* scheduled task for beep event */
 };
 
diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 4300a679cd86..1633ef2c654a 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -2587,8 +2587,10 @@ static struct snd_kcontrol_new stac92xx_control_templates[] = {
 };
 
 /* add dynamic controls */
-static int stac92xx_add_control_idx(struct sigmatel_spec *spec, int type,
-                int idx, const char *name, unsigned long val)
+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;
 
@@ -2607,20 +2609,29 @@ static int stac92xx_add_control_idx(struct sigmatel_spec *spec, int type,
         }
 
         knew = &spec->kctl_alloc[spec->num_kctl_used];
-        *knew = stac92xx_control_templates[type];
+        *knew = *ktemp;
         knew->index = idx;
         knew->name = kstrdup(name, GFP_KERNEL);
-        if (! knew->name)
+        if (!knew->name)
                 return -ENOMEM;
         knew->private_value = val;
         spec->num_kctl_used++;
         return 0;
 }
 
+static inline int stac92xx_add_control_idx(struct sigmatel_spec *spec,
+                                           int type, int idx, const char *name,
+                                           unsigned long val)
+{
+        return stac92xx_add_control_temp(spec,
+                                         &stac92xx_control_templates[type],
+                                         idx, name, val);
+}
+
 
 /* add dynamic controls */
-static int stac92xx_add_control(struct sigmatel_spec *spec, int type,
-                const char *name, unsigned long val)
+static inline int stac92xx_add_control(struct sigmatel_spec *spec, int type,
+                                       const char *name, unsigned long val)
 {
         return stac92xx_add_control_idx(spec, type, 0, name, val);
 }
@@ -3062,6 +3073,43 @@ static int stac92xx_auto_create_beep_ctls(struct hda_codec *codec,
         return 0;
 }
 
+#ifdef CONFIG_SND_HDA_INPUT_BEEP
+#define stac92xx_dig_beep_switch_info snd_ctl_boolean_mono_info
+
+static int stac92xx_dig_beep_switch_get(struct snd_kcontrol *kcontrol,
+                                        struct snd_ctl_elem_value *ucontrol)
+{
+        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+        ucontrol->value.integer.value[0] = codec->beep->enabled;
+        return 0;
+}
+
+static int stac92xx_dig_beep_switch_put(struct snd_kcontrol *kcontrol,
+                                        struct snd_ctl_elem_value *ucontrol)
+{
+        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+        int enabled = !!ucontrol->value.integer.value[0];
+        if (codec->beep->enabled != enabled) {
+                codec->beep->enabled = enabled;
+                return 1;
+        }
+        return 0;
+}
+
+static struct snd_kcontrol_new stac92xx_dig_beep_ctrl = {
+        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+        .info = stac92xx_dig_beep_switch_info,
+        .get = stac92xx_dig_beep_switch_get,
+        .put = stac92xx_dig_beep_switch_put,
+};
+
+static int stac92xx_beep_switch_ctl(struct hda_codec *codec)
+{
+        return stac92xx_add_control_temp(codec->spec, &stac92xx_dig_beep_ctrl,
+                                         0, "PC Beep Playback Switch", 0);
+}
+#endif
+
 static int stac92xx_auto_create_mux_input_ctls(struct hda_codec *codec)
 {
         struct sigmatel_spec *spec = codec->spec;
@@ -3368,6 +3416,7 @@ static int stac92xx_parse_auto_config(struct hda_codec *codec, hda_nid_t dig_out
 #ifdef CONFIG_SND_HDA_INPUT_BEEP
         if (spec->digbeep_nid > 0) {
                 hda_nid_t nid = spec->digbeep_nid;
+                unsigned int caps;
 
                 err = stac92xx_auto_create_beep_ctls(codec, nid);
                 if (err < 0)
@@ -3375,6 +3424,14 @@ static int stac92xx_parse_auto_config(struct hda_codec *codec, hda_nid_t dig_out
                 err = snd_hda_attach_beep_device(codec, nid);
                 if (err < 0)
                         return err;
+                /* if no beep switch is available, make its own one */
+                caps = query_amp_caps(codec, nid, HDA_OUTPUT);
+                if (codec->beep &&
+                    !((caps & AC_AMPCAP_MUTE) >> AC_AMPCAP_MUTE_SHIFT)) {
+                        err = stac92xx_beep_switch_ctl(codec);
+                        if (err < 0)
+                                return err;
+                }
         }
 #endif