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<zombah>
hello, anyone know by chance why exynos_defconfig boot fine on snow kernel-stable and multi_v7_defconfig not?
<javier__>
zombah: which stable kernel version?
<zombah>
javier__: 4.1.4
<zombah>
ah its probably disable IOMMU?
<zombah>
which is not aplicable to multi defconfig
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<javier__>
zombah: exynos iommu is not enabled in multi_v7_defconfig
<javier__>
zombah: there was a bunch of multi_v7_defconfig changes for exynos that landed into 4.2
<javier__>
you need at least:
<javier__>
56579f52aa37 ARM: multi_v7_defconfig: Enable options for Exynos display support
<zombah>
javier__: thanks for info, will check 4.2
<javier__>
c3e4b72db160 ARM: multi_v7_defconfig: Enable support for missing ChromeOS EC drivers
<javier__>
I believe that with those 2 on top of 4.1.4 yor snow should boot correctly
<javier__>
in fact, most likely is booting but is just that you don't have display support
<javier__>
zombah: do you have a serial console?
<zombah>
i dont have serial con right now, cant check to be sure
<javier__>
zombah: ok, my guess is that is booting but just no display. With those 2 you should have display but I may be missing something else
<javier__>
so worth checking the diff between 4.1.4 and linux-next
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<javier__>
I've have to admit that I'm terrible at cc'ing stable when posting patches, have to improve that
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<zombah>
i will test and let you know if this patches help or not
<javier__>
zombah: cool, I should re-post for stable. Need to get some time to dig stable kernel issues
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<zombah>
javier__: you were right adding 4.2 multi_v7 patches makes screen work and system boot fine
<javier__>
zombah: awesome, did you only apply the 2 I mentioned or all of them?
<javier__>
I'm asking so I can post the only needed subset for stable
<zombah>
javier__: i cherry-picked all with snow or 5250 in descr, if non of them depends on new 4.2 features i can test all from ARM: multi_v7_defconfig: Enable support for Samsung S3C64XX SPI to ARM: multi_v7_defconfig: Enable OHCI on exynos SoCs
<javier__>
zombah: that would be really helpful since I don't have access to a snow
<javier__>
but I'm pretty sure the 2 I mentioned should be enough to at least have boot + display
<javier__>
although I guess most of the multi_v7 defconfig ones are -stable material...
<zombah>
javier__: ok i will make more detailed test
<javier__>
zombah: thank a lot, I really appreciate that!