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?
