ALSA: hda - Add mute LED support for HP laptop with ALC269

Some HP laptops have a mute LED that is controlled over the unused
MIC2 VREF pin.  Implement the LED updater like patch_sigmatel.c for this
model.

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

1 files changed, 38 insertions, 0 deletions

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 1694f60631a1..9a361c2c7336 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -3467,6 +3467,10 @@ static int alc_init(struct hda_codec *codec)
         if (spec->init_hook)
                 spec->init_hook(codec);
 
+#ifdef CONFIG_SND_HDA_POWER_SAVE
+        if (codec->patch_ops.check_power_status)
+                codec->patch_ops.check_power_status(codec, 0x01);
+#endif
         return 0;
 }
 
@@ -3827,6 +3831,10 @@ static int alc_resume(struct hda_codec *codec)
         codec->patch_ops.init(codec);
         snd_hda_codec_resume_amp(codec);
         snd_hda_codec_resume_cache(codec);
+#ifdef CONFIG_SND_HDA_POWER_SAVE
+        if (codec->patch_ops.check_power_status)
+                codec->patch_ops.check_power_status(codec, 0x01);
+#endif
         return 0;
 }
 #endif
@@ -13983,6 +13991,34 @@ static struct hda_pcm_stream alc269_44k_pcm_analog_capture = {
         /* NID is set in alc_build_pcms */
 };
 
+#ifdef CONFIG_SND_HDA_POWER_SAVE
+static int alc269_mic2_for_mute_led(struct hda_codec *codec)
+{
+        switch (codec->subsystem_id) {
+        case 0x103c1586:
+                return 1;
+        }
+        return 0;
+}
+
+static int alc269_mic2_mute_check_ps(struct hda_codec *codec, hda_nid_t nid)
+{
+        /* update mute-LED according to the speaker mute state */
+        if (nid == 0x01 || nid == 0x14) {
+                int pinval;
+                if (snd_hda_codec_amp_read(codec, 0x14, 0, HDA_OUTPUT, 0) &
+                    HDA_AMP_MUTE)
+                        pinval = 0x24;
+                else
+                        pinval = 0x20;
+                /* mic2 vref pin is used for mute LED control */
+                snd_hda_codec_write(codec, 0x19, 0,
+                                    AC_VERB_SET_PIN_WIDGET_CONTROL, pinval);
+        }
+        return alc_check_power_status(codec, nid);
+}
+#endif /* CONFIG_SND_HDA_POWER_SAVE */
+
 /*
  * BIOS auto configuration
  */
@@ -14330,6 +14366,8 @@ static int patch_alc269(struct hda_codec *codec)
 #ifdef CONFIG_SND_HDA_POWER_SAVE
         if (!spec->loopback.amplist)
                 spec->loopback.amplist = alc269_loopbacks;
+        if (alc269_mic2_for_mute_led(codec))
+                codec->patch_ops.check_power_status = alc269_mic2_mute_check_ps;
 #endif
 
         return 0;