From: Dave Airlie <airlied@redhat.com>
Date: Sat, 30 Jan 2010 21:07:14 +0000 (+1000)
Subject: drm/radeon/kms: use udelay for short delays
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=20d6c346f69ec68f3f4956c726d830c978f911a8;p=linux-beck.git

drm/radeon/kms: use udelay for short delays

For usec delays use udelay instead of scheduling, this should
allow reclocking to happen faster.

Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/drivers/gpu/drm/radeon/atom.c b/drivers/gpu/drm/radeon/atom.c
index e3b44562d265..bd0c843872b2 100644
--- a/drivers/gpu/drm/radeon/atom.c
+++ b/drivers/gpu/drm/radeon/atom.c
@@ -640,7 +640,8 @@ static void atom_op_delay(atom_exec_context *ctx, int *ptr, int arg)
 	uint8_t count = U8((*ptr)++);
 	SDEBUG("   count: %d\n", count);
 	if (arg == ATOM_UNIT_MICROSEC)
-		schedule_timeout_uninterruptible(usecs_to_jiffies(count));
+		udelay(count);
+	//	schedule_timeout_uninterruptible(usecs_to_jiffies(count));
 	else
 		schedule_timeout_uninterruptible(msecs_to_jiffies(count));
 }