diff options
| author | David Vrabel <dvrabel@arcom.com> | 2006-03-03 20:01:57 +0300 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2006-03-22 12:34:45 +0300 |
| commit | 1037593c8be9551d5a7835703bcaf6073ffb7ec2 (patch) | |
| tree | c2eef278415b13c2854b8bcff9868efb7a321e4f /sound | |
| parent | ae6b813a4dbba2713df497c032798b845289653f (diff) | |
| download | linux-1037593c8be9551d5a7835703bcaf6073ffb7ec2.tar.xz | |
[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>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/cs5535audio/cs5535audio.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/sound/pci/cs5535audio/cs5535audio.c b/sound/pci/cs5535audio/cs5535audio.c index 02e3721030b7..9fc7f3827461 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"); |