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imx-drm: ipu-dc: Use usleep_range instead of msleep 

Since msleep(2) can sleep up to 20ms anyway, make this explicit by using
usleep_range(2000, 20000).

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Philipp Zabel 2014-02-25 12:43:42 +01:00 committed by Greg Kroah-Hartman
parent 7f4392aa87
commit 1f15b69b59
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/imx-drm/ipu-v3/ipu-dc.c
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@ -262,7 +262,7 @@ void ipu_dc_disable_channel(struct ipu_dc *dc)
/* Wait for DC triple buffer to empty */
while ((readl(priv->dc_reg + DC_STAT) & val) != val) {
msleep(2);
usleep_range(2000, 20000);
timeout -= 2;
if (timeout <= 0)
break;