diff options
author | David Vrabel <dvrabel@arcom.com> | 2006-03-03 12:01:57 -0500 |
---|---|---|
committer | Jaroslav Kysela <perex@suse.cz> | 2006-03-22 04:34:45 -0500 |
commit | 1037593c8be9551d5a7835703bcaf6073ffb7ec2 (patch) | |
tree | c2eef278415b13c2854b8bcff9868efb7a321e4f | |
parent | ae6b813a4dbba2713df497c032798b845289653f (diff) |
[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>
-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 | |||
62 | tmp = cs_readl(cs5535au, ACC_CODEC_CNTL); | 62 | tmp = cs_readl(cs5535au, ACC_CODEC_CNTL); |
63 | if (!(tmp & CMD_NEW)) | 63 | if (!(tmp & CMD_NEW)) |
64 | break; | 64 | break; |
65 | msleep(10); | 65 | udelay(1); |
66 | } while (--timeout); | 66 | } while (--timeout); |
67 | if (!timeout) | 67 | if (!timeout) |
68 | snd_printk(KERN_ERR "Failure writing to cs5535 codec\n"); | 68 | snd_printk(KERN_ERR "Failure writing to cs5535 codec\n"); |
@@ -80,14 +80,14 @@ static unsigned short snd_cs5535audio_codec_read(struct cs5535audio *cs5535au, | |||
80 | regdata |= CMD_NEW; | 80 | regdata |= CMD_NEW; |
81 | 81 | ||
82 | cs_writel(cs5535au, ACC_CODEC_CNTL, regdata); | 82 | cs_writel(cs5535au, ACC_CODEC_CNTL, regdata); |
83 | wait_till_cmd_acked(cs5535au, 500); | 83 | wait_till_cmd_acked(cs5535au, 50); |
84 | 84 | ||
85 | timeout = 50; | 85 | timeout = 50; |
86 | do { | 86 | do { |
87 | val = cs_readl(cs5535au, ACC_CODEC_STATUS); | 87 | val = cs_readl(cs5535au, ACC_CODEC_STATUS); |
88 | if ((val & STS_NEW) && reg == (val >> 24)) | 88 | if ((val & STS_NEW) && reg == (val >> 24)) |
89 | break; | 89 | break; |
90 | msleep(10); | 90 | udelay(1); |
91 | } while (--timeout); | 91 | } while (--timeout); |
92 | if (!timeout) | 92 | if (!timeout) |
93 | snd_printk(KERN_ERR "Failure reading cs5535 codec\n"); | 93 | snd_printk(KERN_ERR "Failure reading cs5535 codec\n"); |