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 e3b4456..bd0c843 100644 (file)
--- 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));
 }