Hi Jakob, Thanks for your message. On 04/24/2018 08:19 PM, Jakob Unterwurzacher wrote: > > Full dmesg: > https://gist.github.com/jakob-tsd/33cf395e355bf9bb6956c36438d999e7 > > I have bisected the "master bind failed" down to: > >> commit 9176a303d971dc0fb35469c531c0d263667d2277 >> Author: Jeffy Chen <jeffy.chen at rock-chips.com> >> Date: Fri Mar 23 15:38:10 2018 +0800 >> >> iommu/rockchip: Use IOMMU device for dma mapping operations >> >> Use the first registered IOMMU device for dma mapping operations, and >> drop the domain platform device. >> >> This is similar to exynos iommu driver. >> >> Signed-off-by: Jeffy Chen <jeffy.chen at rock-chips.com> >> Reviewed-by: Tomasz Figa <tfiga at chromium.org> >> Reviewed-by: Robin Murphy <robin.murphy at arm.com> >> Signed-off-by: Joerg Roedel <jroedel at suse.de> > > Moving to one commit earlier brings the screen to life. Just with > colorful garbage, but I guess that's a different problem. > > Is this a known issue with the IOMMU change? right, i think it's a known issue, as the iommu failed to get clks: [ 1.525153] rk_iommu ff8f3f00.iommu: Failed to get clk 'iface': -2 [ 1.525316] rk_iommu: probe of ff8f3f00.iommu failed with error -2 [ 1.525484] rk_iommu ff903f00.iommu: Failed to get clk 'iface': -2 [ 1.525643] rk_iommu: probe of ff903f00.iommu failed with error -2 there's a followed patch to add those clks to the dtsi, and also a fix patch to make those clks optional(by heiko): https://www.spinics.net/lists/arm-kernel/msg645696.html http://lists.infradead.org/pipermail/linux-rockchip/2018-April/020349.html > > Thanks, > Jakob
