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 <[email protected]> > --- > 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 > _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
