[ALSA] hda-codec - Add EAPD controls for ALC260 test model

This implements a switch control for the EAPD signal output by the ALC26x
chips.  Since some laptops may utilise this to activate useful things it
is handy to have a control for this in the ALC26x test models.  The patch
includes the control in the ALC260 test model.

Signed-off-by: Jonathan Woithe <jwoithe@physics.adelaide.edu.au>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 59 insertions, 0 deletions

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 617f3ee304b1..0a64d24e7fda 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -608,6 +608,59 @@ static int alc_spdif_ctrl_put(struct snd_kcontrol *kcontrol,
           .private_value = nid | (mask<<16) }
 #endif   /* CONFIG_SND_DEBUG */
 
+/* A switch control to allow the enabling EAPD digital outputs on the ALC26x.
+ * Again, this is only used in the ALC26x test models to help identify when
+ * the EAPD line must be asserted for features to work.
+ */
+#ifdef CONFIG_SND_DEBUG
+#define alc_eapd_ctrl_info      snd_ctl_boolean_mono_info
+
+static int alc_eapd_ctrl_get(struct snd_kcontrol *kcontrol,
+                              struct snd_ctl_elem_value *ucontrol)
+{
+        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+        hda_nid_t nid = kcontrol->private_value & 0xffff;
+        unsigned char mask = (kcontrol->private_value >> 16) & 0xff;
+        long *valp = ucontrol->value.integer.value;
+        unsigned int val = snd_hda_codec_read(codec, nid, 0,
+                                              AC_VERB_GET_EAPD_BTLENABLE, 0x00);
+
+        *valp = (val & mask) != 0;
+        return 0;
+}
+
+static int alc_eapd_ctrl_put(struct snd_kcontrol *kcontrol,
+                              struct snd_ctl_elem_value *ucontrol)
+{
+        int change;
+        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+        hda_nid_t nid = kcontrol->private_value & 0xffff;
+        unsigned char mask = (kcontrol->private_value >> 16) & 0xff;
+        long val = *ucontrol->value.integer.value;
+        unsigned int ctrl_data = snd_hda_codec_read(codec, nid, 0,
+                                                    AC_VERB_GET_EAPD_BTLENABLE,
+                                                    0x00);
+
+        /* Set/unset the masked control bit(s) as needed */
+        change = (!val ? 0 : mask) != (ctrl_data & mask);
+        if (!val)
+                ctrl_data &= ~mask;
+        else
+                ctrl_data |= mask;
+        snd_hda_codec_write_cache(codec, nid, 0, AC_VERB_SET_EAPD_BTLENABLE,
+                                  ctrl_data);
+
+        return change;
+}
+
+#define ALC_EAPD_CTRL_SWITCH(xname, nid, mask) \
+        { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = 0,  \
+          .info = alc_eapd_ctrl_info, \
+          .get = alc_eapd_ctrl_get, \
+          .put = alc_eapd_ctrl_put, \
+          .private_value = nid | (mask<<16) }
+#endif   /* CONFIG_SND_DEBUG */
+
 /*
  * set up from the preset table
  */
@@ -4332,6 +4385,12 @@ static struct snd_kcontrol_new alc260_test_mixer[] = {
         ALC_SPDIF_CTRL_SWITCH("SPDIF Playback Switch", 0x03, 0x01),
         ALC_SPDIF_CTRL_SWITCH("SPDIF Capture Switch", 0x06, 0x01),
 
+        /* A switch allowing EAPD to be enabled.  Some laptops seem to use
+         * this output to turn on an external amplifier.
+         */
+        ALC_EAPD_CTRL_SWITCH("LINE-OUT EAPD Enable Switch", 0x0f, 0x02),
+        ALC_EAPD_CTRL_SWITCH("HP-OUT EAPD Enable Switch", 0x10, 0x02),
+
         { } /* end */
 };
 static struct hda_verb alc260_test_init_verbs[] = {