| Message ID | 1428105597-15216-1-git-send-email-tharvey@gateworks.com |
|---|---|
| State | Deferred |
| Delegated to: | Stefano Babic |
| Headers | show |
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 >
On Sat, Apr 4, 2015 at 7:52 AM, Liu Ying <Ying.Liu@freescale.com> wrote: > 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 Liu, It certainly does not - this issue was encountered back on 2014-04. I was hoping you might have some knowledge of this one! I will re-test for this specific issue now that I am re-based on master. Thanks, Tim
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) */
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(+)