[ALSA] [snd-intel-hda] enable center/LFE speaker on some laptops

This patch adds LFE mixer controls for laptops with a stac9200 and a mono
speaker pin with amplifier.

Signed-off-by: Richard Fish <bigfish@asmallpond.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 63 insertions, 0 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 87169032be1..bcbbe111ab9 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -1223,6 +1223,66 @@ static int stac9200_auto_create_hp_ctls(struct hda_codec *codec,
         return 0;
 }
 
+/* add playback controls for LFE output */
+static int stac9200_auto_create_lfe_ctls(struct hda_codec *codec,
+                                        struct auto_pin_cfg *cfg)
+{
+        struct sigmatel_spec *spec = codec->spec;
+        int err;
+        hda_nid_t lfe_pin = 0x0;
+        int i;
+
+        /*
+         * search speaker outs and line outs for a mono speaker pin
+         * with an amp.  If one is found, add LFE controls
+         * for it.
+         */
+        for (i = 0; i < spec->autocfg.speaker_outs && lfe_pin == 0x0; i++) {
+                hda_nid_t pin = spec->autocfg.speaker_pins[i];
+                unsigned long wcaps = get_wcaps(codec, pin);
+                wcaps &= (AC_WCAP_STEREO | AC_WCAP_OUT_AMP);
+                if (wcaps == AC_WCAP_OUT_AMP)
+                        /* found a mono speaker with an amp, must be lfe */
+                        lfe_pin = pin;
+        }
+
+        /* if speaker_outs is 0, then speakers may be in line_outs */
+        if (lfe_pin == 0 && spec->autocfg.speaker_outs == 0) {
+                for (i = 0; i < spec->autocfg.line_outs && lfe_pin == 0x0; i++) {
+                        hda_nid_t pin = spec->autocfg.line_out_pins[i];
+                        unsigned long cfg;
+                        cfg = snd_hda_codec_read(codec, pin, 0,
+                                                 AC_VERB_GET_CONFIG_DEFAULT,
+                                                 0x00);
+                        if (get_defcfg_device(cfg) == AC_JACK_SPEAKER) {
+                                unsigned long wcaps = get_wcaps(codec, pin);
+                                wcaps &= (AC_WCAP_STEREO | AC_WCAP_OUT_AMP);
+                                if (wcaps == AC_WCAP_OUT_AMP)
+                                        /* found a mono speaker with an amp,
+                                           must be lfe */
+                                        lfe_pin = pin;
+                        }
+                }
+        }
+
+        if (lfe_pin) {
+                err = stac92xx_add_control(spec, STAC_CTL_WIDGET_VOL,
+                                           "LFE Playback Volume",
+                                           HDA_COMPOSE_AMP_VAL(lfe_pin, 1, 0,
+                                                               HDA_OUTPUT));
+                if (err < 0)
+                        return err;
+                err = stac92xx_add_control(spec, STAC_CTL_WIDGET_MUTE,
+                                           "LFE Playback Switch",
+                                           HDA_COMPOSE_AMP_VAL(lfe_pin, 1, 0,
+                                                               HDA_OUTPUT));
+                if (err < 0)
+                        return err;
+        }
+
+        return 0;
+}
+
 static int stac9200_parse_auto_config(struct hda_codec *codec)
 {
         struct sigmatel_spec *spec = codec->spec;
@@ -1237,6 +1297,9 @@ static int stac9200_parse_auto_config(struct hda_codec *codec)
         if ((err = stac9200_auto_create_hp_ctls(codec, &spec->autocfg)) < 0)
                 return err;
 
+        if ((err = stac9200_auto_create_lfe_ctls(codec, &spec->autocfg)) < 0)
+                return err;
+
         if (spec->autocfg.dig_out_pin)
                 spec->multiout.dig_out_nid = 0x05;
         if (spec->autocfg.dig_in_pin)