ALSA: hda/idt - Cache the power-map bits
For avoiding unnecessary codec read/write verbs at each jack detection.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 1f6f520..7db8228 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -222,6 +222,7 @@
unsigned char aloopback_shift;
/* power management */
+ unsigned int power_map_bits;
unsigned int num_pwrs;
const hda_nid_t *pwr_nids;
const hda_nid_t *dac_list;
@@ -315,6 +316,9 @@
struct hda_vmaster_mute_hook vmaster_mute;
};
+#define AC_VERB_IDT_SET_POWER_MAP 0x7ec
+#define AC_VERB_IDT_GET_POWER_MAP 0xfec
+
static const hda_nid_t stac9200_adc_nids[1] = {
0x03,
};
@@ -4406,6 +4410,12 @@
/* sync mute LED */
snd_hda_sync_vmaster_hook(&spec->vmaster_mute);
+
+ /* sync the power-map */
+ if (spec->num_pwrs)
+ snd_hda_codec_write(codec, codec->afg, 0,
+ AC_VERB_IDT_SET_POWER_MAP,
+ spec->power_map_bits);
if (spec->dac_list)
stac92xx_power_down(codec);
return 0;
@@ -4651,14 +4661,18 @@
idx = 1 << idx;
- val = snd_hda_codec_read(codec, codec->afg, 0, 0x0fec, 0x0) & 0xff;
+ val = spec->power_map_bits;
if (enable)
val &= ~idx;
else
val |= idx;
/* power down unused output ports */
- snd_hda_codec_write(codec, codec->afg, 0, 0x7ec, val);
+ if (val != spec->power_map_bits) {
+ spec->power_map_bits = val;
+ snd_hda_codec_write(codec, codec->afg, 0,
+ AC_VERB_IDT_SET_POWER_MAP, val);
+ }
}
static void stac92xx_pin_sense(struct hda_codec *codec, hda_nid_t nid)
@@ -4926,7 +4940,8 @@
{
if (nid == codec->afg)
snd_iprintf(buffer, "Power-Map: 0x%02x\n",
- snd_hda_codec_read(codec, nid, 0, 0x0fec, 0x0));
+ snd_hda_codec_read(codec, nid, 0,
+ AC_VERB_IDT_GET_POWER_MAP, 0));
}
static void analog_loop_proc_hook(struct snd_info_buffer *buffer,