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ALSA: hda - Avoid unnecessary parameter read for EPSS

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EPSS parameter should be static, so we can read it once and remember.
This also allows more easily to override the wrong EPSS capability
reported from a codec by changing the flag in the codec
initialization step.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2012-08-28 09:18:01 -07:00
parent 042b92c185
commit 983f6b9381
2 changed files with 9 additions and 2 deletions
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10
sound/pci/hda/hda_codec.c
View File

@ -1209,6 +1209,9 @@ static void snd_hda_codec_free(struct hda_codec *codec)
kfree(codec);
}
static bool snd_hda_codec_get_supported_ps(struct hda_codec *codec,
hda_nid_t fg, unsigned int power_state);
static void hda_set_power_state(struct hda_codec *codec, hda_nid_t fg,
unsigned int power_state);
@ -1317,6 +1320,10 @@ int /*__devinit*/ snd_hda_codec_new(struct hda_bus *bus,
AC_VERB_GET_SUBSYSTEM_ID, 0);
}
codec->epss = snd_hda_codec_get_supported_ps(codec,
codec->afg ? codec->afg : codec->mfg,
AC_PWRST_EPSS);
/* power-up all before initialization */
hda_set_power_state(codec,
codec->afg ? codec->afg : codec->mfg,
@ -3543,8 +3550,7 @@ static void hda_set_power_state(struct hda_codec *codec, hda_nid_t fg,
/* this delay seems necessary to avoid click noise at power-down */
if (power_state == AC_PWRST_D3) {
/* transition time less than 10ms for power down */
bool epss = snd_hda_codec_get_supported_ps(codec, fg, AC_PWRST_EPSS);
msleep(epss ? 10 : 100);
msleep(codec->epss ? 10 : 100);
}
/* repeat power states setting at most 10 times*/

1
sound/pci/hda/hda_codec.h
View File

@ -862,6 +862,7 @@ struct hda_codec {
unsigned int ignore_misc_bit:1; /* ignore MISC_NO_PRESENCE bit */
unsigned int no_jack_detect:1; /* Machine has no jack-detection */
unsigned int pcm_format_first:1; /* PCM format must be set first */
unsigned int epss:1; /* supporting EPSS? */
#ifdef CONFIG_SND_HDA_POWER_SAVE
unsigned int power_on :1; /* current (global) power-state */
int power_transition; /* power-state in transition */