Hi Tim,

Does your code base contain this patch[1]? It probably addressed the same issue you meet.

[1] http://lists.denx.de/pipermail/u-boot/2014-February/174533.html

Regards, Liu Ying

On Fri, Apr 03, 2015 at 04:59:57PM -0700, Tim Harvey wrote:

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@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