Hello Marek, On Mon, May 4, 2015 at 10:15 AM, Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> wrote: > Hello Everyone, > > This is yet another attempt to get Exynos SYSMMU driver with integrated > with IOMMU & DMA-mapping subsystems. The main change from previous > version is addition of the patches to define iommu-mapping, which need > to be created during system boot to avoid IOMMU fault by devices, which > has been left enabled by bootloader (i.e. framebuffer displaying slash > screen). > > Patches has been also rebased onto v4.1-rc2 with 'arm: dma-mapping: fix > off-by-one check in arm_setup_iommu_dma_ops' patch applied (see commit > 1424532b2163bf1580f4b1091a5801e12310fac5 on fixes branch in > git://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-arm.git, > more information: > http://www.spinics.net/lists/arm-kernel/msg414722.html). > > All patches are also available in the following git repository: > https://git.linaro.org/people/marek.szyprowski/linux-srpol.git > branch v4.1-exynos-iommu. > Thanks for the new series, this time I didn't get a system hang when I enabled both CONFIG_DRM_EXYNOS_FIMD and CONFIG_DRM_EXYNOS_DP on my Exynos5420 Peach Pit Chromebook. The system finished booting and I have both a console on the HDMI and eDP/LVDS displays. But if I try to start X or weston, I again have a completele system hang with no output on the serial console. This works correctly without your IOMMU series. And again disabling CONFIG_DRM_EXYNOS_DP or CONFIG_DRM_EXYNOS_FIMD avoids the system to hang. If I only have CONFIG_DRM_EXYNOS_HDMI enabled, then I can start X with out issues and is displayed correctly in the HDMI output. So it seems your workaround for the boot-loader leaving the FIMD dma engine enabled is not enough? I'm not a graphics person so I can think of the top of my head what could trigger the system hang when X or weston are executed so I wondered if you have any ideas. > Best regards > Marek Szyprowski > Samsung R&D Institute Poland > Best regards, Javier -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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