From 72474be62d6ec2e0337ff01ecbd737f9c5c242c7 Mon Sep 17 00:00:00 2001
From: Matthew Ranostay <mranostay@embeddedalley.com>
Date: Thu, 9 Oct 2008 09:32:17 -0400
Subject: [PATCH] ALSA: hda: VREF powerdown for headphones
Add support for powering down VREF on standard headphone insertion, also
powers up the VREF on a headset insertion.
Signed-off-by: Matthew Ranostay <mranostay@embeddedalley.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---
sound/pci/hda/patch_sigmatel.c | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 5c65f7d4606f..c461baa83c2a 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -38,6 +38,7 @@
#define NUM_CONTROL_ALLOC 32
#define STAC_PWR_EVENT 0x20
#define STAC_HP_EVENT 0x30
+#define STAC_VREF_EVENT 0x40
enum {
STAC_REF,
@@ -3854,13 +3855,22 @@ static void stac92xx_unsol_event(struct hda_codec *codec, unsigned int res)
struct sigmatel_spec *spec = codec->spec;
int idx = res >> 26 & 0x0f;
- switch ((res >> 26) & 0x30) {
+ switch ((res >> 26) & 0x70) {
case STAC_HP_EVENT:
stac92xx_hp_detect(codec, res);
/* fallthru */
case STAC_PWR_EVENT:
if (spec->num_pwrs > 0)
stac92xx_pin_sense(codec, idx);
+ break;
+ case STAC_VREF_EVENT: {
+ int data = snd_hda_codec_read(codec, codec->afg, 0,
+ AC_VERB_GET_GPIO_DATA, 0);
+ /* toggle VREF state based on GPIOx status */
+ snd_hda_codec_write(codec, codec->afg, 0, 0x7e0,
+ !!(data & (1 << idx)));
+ break;
+ }
}
}
@@ -4360,6 +4370,17 @@ static int patch_stac92hd71bxx(struct hda_codec *codec)
codec->slave_dig_outs = stac92hd71bxx_slave_dig_outs;
break;
case 0x111d7608: /* 5 Port with Analog Mixer */
+ switch (codec->subsystem_id) {
+ case 0x103c361a:
+ /* Enable VREF power saving on GPIO1 detect */
+ snd_hda_codec_write(codec, codec->afg, 0,
+ AC_VERB_SET_GPIO_UNSOLICITED_RSP_MASK, 0x02);
+ snd_hda_codec_write_cache(codec, codec->afg, 0,
+ AC_VERB_SET_UNSOLICITED_ENABLE,
+ (AC_USRSP_EN | STAC_VREF_EVENT | 0x01));
+ spec->gpio_mask |= 0x02;
+ break;
+ }
if ((codec->revision_id & 0xf) == 0 ||
(codec->revision_id & 0xf) == 1) {
#ifdef SND_HDA_NEEDS_RESUME
--
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