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>

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 1694f60..9a361c2 100644 (file)
--- 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;