From 1037593c8be9551d5a7835703bcaf6073ffb7ec2 Mon Sep 17 00:00:00 2001 From: David Vrabel Date: Fri, 3 Mar 2006 18:01:57 +0100 Subject: [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 Signed-off-by: Takashi Iwai --- sound/pci/cs5535audio/cs5535audio.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/sound/pci/cs5535audio/cs5535audio.c b/sound/pci/cs5535audio/cs5535audio.c index 02e3721030b..9fc7f382746 100644 --- a/sound/pci/cs5535audio/cs5535audio.c +++ b/sound/pci/cs5535audio/cs5535audio.c @@ -62,7 +62,7 @@ static void wait_till_cmd_acked(struct cs5535audio *cs5535au, unsigned long time 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 @@ static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au, 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"); -- cgit v1.2.3