On Sat, Apr 24, 2021 at 11:27:10PM +0300, Dmitry Osipenko wrote: > 23.04.2021 18:23, Dmitry Osipenko пишет: > > 23.04.2021 18:01, Guillaume Tucker пишет: > >> On 02/04/2021 15:40, Dmitry Osipenko wrote: > >>> 01.04.2021 11:55, Nicolin Chen пишет: > >>>> On Mon, Mar 29, 2021 at 02:32:56AM +0300, Dmitry Osipenko wrote: > >>>>> The previous commit fixes problem where display client was attaching too > >>>>> early to IOMMU during kernel boot in a multi-platform kernel configuration > >>>>> which enables CONFIG_ARM_DMA_USE_IOMMU=y. The workaround that helped to > >>>>> defer the IOMMU attachment for Nyan Big Chromebook isn't needed anymore, > >>>>> revert it. > >>>> > >>>> Sorry for the late reply. I have been busy with downstream tasks. > >>>> > >>>> I will give them a try by the end of the week. Yet, probably it'd > >>>> be better to include Guillaume also as he has the Nyan platform. > >>>> > >>> > >>> Indeed, thanks. Although, I'm pretty sure that it's the same issue which > >>> I reproduced on Nexus 7. > >>> > >>> Guillaume, could you please give a test to these patches on Nyan Big? > >>> There should be no EMEM errors in the kernel log with this patches. > >>> > >>> https://patchwork.ozlabs.org/project/linux-tegra/list/?series=236215 > >> > >> So sorry for the very late reply. I have tried the patches but > >> hit some issues on linux-next, it's not reaching a login prompt > >> with next-20210422. So I then tried with next-20210419 which > >> does boot but shows the IOMMU error: > >> > >> <6>[ 2.995341] tegra-dc 54200000.dc: Adding to iommu group 1 > >> <4>[ 3.001070] Failed to attached device 54200000.dc to IOMMU_mapping > >> > >> https://lava.collabora.co.uk/scheduler/job/3570052#L1120 > >> > >> The branch I'm using with the patches applied can be found here: > >> > >> https://gitlab.collabora.com/gtucker/linux/-/commits/next-20210419-nyan-big-drm-read/ > >> > >> Hope this helps, let me know if you need anything else to be > >> tested. > > > > > > Hello Guillaume, > > > > The current linux-next doesn't boot on all ARM (AFAIK), the older > > next-20210413 works. The above message should be unrelated to the boot > > problem. It should be okay to ignore that message as it should be > > harmless in yours case. > > > > Although, the 20210419 should be good. > > Thierry, do you know what those SOR and Nouveau issues are about? There's a use-after-free (though it's really a use-before-init) issue in linux-next at the moment, but a fix has been suggested. The fix for this along with an additional leak plug is here: http://patchwork.ozlabs.org/project/linux-tegra/list/?series=240569 I'm not aware of any Nouveau issues. What version and platform are those happening on? Are there any logs? I can't seem to find them in this thread. Thierry
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