On 23/07/2019 11:07, Jose Abreu wrote: > From: Jon Hunter <jonathanh@xxxxxxxxxx> > Date: Jul/23/2019, 11:01:24 (UTC+00:00) > >> This appears to be a winner and by disabling the SMMU for the ethernet >> controller and reverting commit 954a03be033c7cef80ddc232e7cbdb17df735663 >> this worked! So yes appears to be related to the SMMU being enabled. We >> had to enable the SMMU for ethernet recently due to commit >> 954a03be033c7cef80ddc232e7cbdb17df735663. > > Finally :) > > However, from "git show 954a03be033c7cef80ddc232e7cbdb17df735663": > > + There are few reasons to allow unmatched stream bypass, and > + even fewer good ones. If saying YES here breaks your board > + you should work on fixing your board. > > So, how can we fix this ? Is your ethernet DT node marked as > "dma-coherent;" ? TBH I have no idea. I can't say I fully understand your change or how it is breaking things for us. Currently, the Tegra DT binding does not have 'dma-coherent' set. I see this is optional, but I am not sure how you determine whether or not this should be set. Jon -- nvpublic
