1 files changed, 57 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches-2.6.24/1117-audio-tickless-timeout.patch.patch b/target/linux/s3c24xx/patches-2.6.24/1117-audio-tickless-timeout.patch.patch
new file mode 100644
index 0000000000..1c74f1bfed
--- /dev/null
+++ b/target/linux/s3c24xx/patches-2.6.24/1117-audio-tickless-timeout.patch.patch
@@ -0,0 +1,57 @@
+From 5d6f04132cb5bd8fa8f1c9c9c3dc337aeae18f4c Mon Sep 17 00:00:00 2001
+From: Werner Almesberger <werner@openmoko.org>
+Date: Sun, 13 Apr 2008 07:25:55 +0100
+Subject: [PATCH] audio-tickless-timeout.patch
+
+When we resume, we can end up in
+sound/soc/s3c24xx/s3c24xx-i2s.c:s3c24xx_snd_lrsync
+with the timer tick still disabled, and the LR signal never happening.
+Thus, we loop forever.
+
+The patch below changes the timeout mechanism to use udelay, which
+doesn't need timer ticks.
+
+Note that this code is in a module, so to get the fix, you have to
+build the modules, and update them.
+
+The kernel now resumes but does the ugly GSM modem ticking. I'll have
+to find a good place to turn that one off ...
+
+- Werner
+
+---------------------------------- cut here -----------------------------------
+
+- sound/soc/s3c24xx/s3c24xx-i2s.c (s3c24xx_snd_lrsync): in resume, we may
+  call s3c24xx_snd_lrsync with timer ticks disabled, thus jiffies never
+  change. Use udelay to avoid this problem.
+---
+ sound/soc/s3c24xx/s3c24xx-i2s.c |    5 +++--
+ 1 files changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/sound/soc/s3c24xx/s3c24xx-i2s.c b/sound/soc/s3c24xx/s3c24xx-i2s.c
+index 4d74cc0..43fd25a 100644
+--- a/sound/soc/s3c24xx/s3c24xx-i2s.c
++++ b/sound/soc/s3c24xx/s3c24xx-i2s.c
+@@ -180,7 +180,7 @@ static void s3c24xx_snd_rxctrl(int on)
+ static int s3c24xx_snd_lrsync(void)
+ {
+ 	u32 iiscon;
+-	unsigned long timeout = jiffies + msecs_to_jiffies(5);
++	int timeout = 50; /* 5ms */
+ 
+ 	DBG("Entered %s\n", __FUNCTION__);
+ 
+@@ -189,8 +189,9 @@ static int s3c24xx_snd_lrsync(void)
+ 		if (iiscon & S3C2410_IISCON_LRINDEX)
+ 			break;
+ 
+-		if (timeout < jiffies)
++		if (!--timeout)
+ 			return -ETIMEDOUT;
++		udelay(100);
+ 	}
+ 
+ 	return 0;
+-- 
+1.5.6.5
+