[U-Boot] [PATCH] imx: ipu: fix occasional hang following disabling of channel

[Tim Harvey]

It has been observed that some IMX6SDL SoC will hang appx 0.1% of boots
between disabling the ipu channel and disabling DMA preceeding an OS boot
unless an extra delay is added here.

The specific cause is still under investigation.

Signed-off-by: Tim Harvey <tharvey at gateworks.com>
---
 drivers/video/ipu_common.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/video/ipu_common.c b/drivers/video/ipu_common.c
index 5873531..3c1bbbb 100644
--- a/drivers/video/ipu_common.c
+++ b/drivers/video/ipu_common.c
@@ -1109,6 +1109,7 @@ int32_t ipu_disable_channel(ipu_channel_t channel)
 	if ((channel == MEM_BG_SYNC) || (channel == MEM_FG_SYNC) ||
 	    (channel == MEM_DC_SYNC)) {
 		ipu_dp_dc_disable(channel, 0);
+		mdelay(50);
 	}
 
 	/* Disable DMA channel(s) */
-- 
1.9.1