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authorSimon Arlott <simon@fire.lp0.eu>2009-06-21 19:50:48 +0100
committerTakashi Iwai <tiwai@suse.de>2009-06-22 07:54:58 +0200
commit115551d98e4c05bb982bd940f08a489fa9b0a4a1 (patch)
tree16a5f9bdeabd03f6c52905e693a469e4d8784af5
parent1f3fff7bda95b75a6be5a02c2a6902573d8c18e6 (diff)
downloadop-kernel-dev-115551d98e4c05bb982bd940f08a489fa9b0a4a1.zip
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ALSA: via82xx: add option to disable 500ms delay in snd_via82xx_codec_wait
There's a large 500ms delay in snd_via82xx_codec_wait() that, at least on my hardware, appears to be unnecessary. The rest of the init of the card works without logging any warnings or errors and both audio and mixer settings work. This adds an "nodelay" parameter to disable this (undocumented in the code) large delay improving bootup time by 489-500ms. [ 1.034217] initcall alsa_card_via82xx_init+0x0/0x16 returned 0 after 505757 usecs vs. [ 0.533136] initcall alsa_card_via82xx_init+0x0/0x16 returned 0 after 15915 usecs Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Takashi Iwai <tiwai@suse.de>
-rw-r--r--sound/pci/via82xx.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/sound/pci/via82xx.c b/sound/pci/via82xx.c
index 1ef58c5..949fcaf 100644
--- a/sound/pci/via82xx.c
+++ b/sound/pci/via82xx.c
@@ -85,6 +85,7 @@ static int joystick;
static int ac97_clock = 48000;
static char *ac97_quirk;
static int dxs_support;
+static int nodelay;
module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
@@ -102,6 +103,8 @@ module_param(ac97_quirk, charp, 0444);
MODULE_PARM_DESC(ac97_quirk, "AC'97 workaround for strange hardware.");
module_param(dxs_support, int, 0444);
MODULE_PARM_DESC(dxs_support, "Support for DXS channels (0 = auto, 1 = enable, 2 = disable, 3 = 48k only, 4 = no VRA, 5 = enable any sample rate)");
+module_param(nodelay, int, 0444);
+MODULE_PARM_DESC(nodelay, "Disable 500ms init delay");
/* just for backward compatibility */
static int enable;
@@ -549,7 +552,8 @@ static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
int err;
err = snd_via82xx_codec_ready(chip, ac97->num);
/* here we need to wait fairly for long time.. */
- msleep(500);
+ if (!nodelay)
+ msleep(500);
}
static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
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