[ALSA] CS5535: shorter delays when accessing AC'97 codec registers
Modules: CS5535 driver
The 10 ms sleeps while waiting for AC'97 codec register reads/writes to
complete are excessive given the maxmium time is one AC'97 frame (~21 us).
With AC'97 codecs with integrated touchscreens (like the UCB1400) this
improves the interactive performance of the touchscreen.
Signed-off-by: David Vrabel <dvrabel@arcom.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/cs5535audio/cs5535audio.c b/sound/pci/cs5535audio/cs5535audio.c
index 02e3721..9fc7f38 100644
--- a/sound/pci/cs5535audio/cs5535audio.c
+++ b/sound/pci/cs5535audio/cs5535audio.c
@@ -62,7 +62,7 @@
tmp = cs_readl(cs5535au, ACC_CODEC_CNTL);
if (!(tmp & CMD_NEW))
break;
- msleep(10);
+ udelay(1);
} while (--timeout);
if (!timeout)
snd_printk(KERN_ERR "Failure writing to cs5535 codec\n");
@@ -80,14 +80,14 @@
regdata |= CMD_NEW;
cs_writel(cs5535au, ACC_CODEC_CNTL, regdata);
- wait_till_cmd_acked(cs5535au, 500);
+ wait_till_cmd_acked(cs5535au, 50);
timeout = 50;
do {
val = cs_readl(cs5535au, ACC_CODEC_STATUS);
if ((val & STS_NEW) && reg == (val >> 24))
break;
- msleep(10);
+ udelay(1);
} while (--timeout);
if (!timeout)
snd_printk(KERN_ERR "Failure reading cs5535 codec\n");