My patch in attach --- Best Regards, Misha Komarovskiy zombahatgmaildotcom
On Mon, Aug 17, 2015 at 4:13 PM, Guillaume Gardet <[email protected]> wrote: > Perfect! > > I submitted an update request to include it: > https://build.opensuse.org/request/show/323645 > > We still need to update our kernel config to disable exynos IOMMU. But > kernel repo is currently broken for master. > Could send your config patch against stable kernel (4.1), please? > > > Guillaume > > > > Le 17/08/2015 14:31, Misha Komarovskiy a écrit : >> >> Adding them with force_drivers do the trick. >> --- >> Best Regards, >> Misha Komarovskiy >> zombahatgmaildotcom >> >> >> On Mon, Aug 17, 2015 at 3:09 PM, Guillaume Gardet >> <[email protected]> wrote: >>> >>> You do not need to modify your kernel for that. >>> Remove your /etc/modules-load.d/ file to get back in non-auto loading. >>> >>> Open the file '/etc/dracut.conf.d/exynos_modules.conf' and add the >>> following >>> line: >>> add_drivers += "cros_ec_devs ptn3460 pwm-samsung" >>> >>> Then recreate your initrd with: >>> dracut -f >>> and reboot. >>> >>> >>> If it does not help, replace: >>> add_drivers += "cros_ec_devs ptn3460 pwm-samsung" >>> by: >>> force_drivers += "cros_ec_devs ptn3460 pwm-samsung" >>> >>> Then recreate your initrd with: >>> dracut -f >>> and reboot. >>> >>> >>> Guillaume >>> >>> >>> >>> Le 17/08/2015 14:04, Misha Komarovskiy a écrit : >>>> >>>> I made test on already installed image. Connected with usb network >>>> dongle, cloned kernel-source git, made sequence-patch to 4.1 source, >>>> copied modified lpae kernel config then booted >>>> resulting kernel. >>>> This extra modules i tried to add to /etc/modules-load.d/ and system >>>> start fine this way without manual modprobing, but this is not same as >>>> dracut config as i understand. >>>> >>>> I never tried to branch kernel-source repo on obs to create custom >>>> config, i can make this test also if you can give me please some >>>> directions on how to properly create modified kernel branch. >>>> >>>> >>>> >>>> --- >>>> Best Regards, >>>> Misha Komarovskiy >>>> zombahatgmaildotcom >>>> >>>> >>>> On Mon, Aug 17, 2015 at 2:53 PM, Guillaume Gardet >>>> <[email protected]> wrote: >>>>> >>>>> >>>>> Le 17/08/2015 13:30, Misha Komarovskiy a écrit : >>>>>> >>>>>> Just tested lpae config without CONFIG_EXYNOS_IOMMU on snow, system >>>>>> boots with black screen same, >>>>>> then modprobe cros_ec_devs, ptn3460, pwm-samsung makes panel start to >>>>>> work without kernel panic. >>>>> >>>>> >>>>> Thanks for your tests. >>>>> Could you add thoses modules to /etc/dracut.conf.d/exynos_modules.conf >>>>> with >>>>> the new line: >>>>> add_drivers += "cros_ec_devs ptn3460 pwm-samsung" >>>>> >>>>> and recreate initrd with dracut and check if it boots fine? >>>>> >>>>> If it does not work, try 'force_drivers+=' instead of 'add_drivers +=' >>>>> and >>>>> recreate initrd. >>>>> >>>>> >>>>> Guillaume >>>>> >>>>> >>>>>> --- >>>>>> Best Regards, >>>>>> Misha Komarovskiy >>>>>> zombahatgmaildotcom >>>>>> >>>>>> >>>>>> On Mon, Aug 17, 2015 at 12:01 PM, Misha Komarovskiy <[email protected]> >>>>>> wrote: >>>>>>> >>>>>>> Hello Guillaume, >>>>>>> I tested both exynos_defconfig and multi_v7_defconfig, they work >>>>>>> fine. >>>>>>> But ill test lpae config without EXYNOS_IOMMU today and will report. >>>>>>> --- >>>>>>> Best Regards, >>>>>>> Misha Komarovskiy >>>>>>> zombahatgmaildotcom >>>>>>> >>>>>>> >>>>>>> On Mon, Aug 17, 2015 at 9:59 AM, Guillaume Gardet >>>>>>> <[email protected]> wrote: >>>>>>>> >>>>>>>> Hi, >>>>>>>> >>>>>>>> Le 16/08/2015 21:59, Misha Komarovskiy a écrit : >>>>>>>>> >>>>>>>>> Hello, >>>>>>>>> Maybe we can disable only Exynos IOMMU in configs for now? Same way >>>>>>>>> it >>>>>>>>> is disabled in current exynos_defconfig here >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/arch/arm/configs/exynos_defconfig?id=6562f3bd396ab6d2c9b455e95c67e33bab73bff5 >>>>>>>>> As i understand it is broken for all exynos devices not only snow. >>>>>>>> >>>>>>>> >>>>>>>> That is exactly what I would like to do since I read this thread: >>>>>>>> https://lkml.org/lkml/2015/2/17/163 >>>>>>>> >>>>>>>> Before submitting the idea here, I wanted to check if disabling >>>>>>>> Exynos >>>>>>>> IOMMU >>>>>>>> in config was enough. >>>>>>>> I had only time to test the exynos_defconfig with openSUSE kernel >>>>>>>> and >>>>>>>> it >>>>>>>> was >>>>>>>> OK (boot messages and login prompt displayed). >>>>>>>> >>>>>>>> >>>>>>>> Guillaume >>>>>>>> >>>>>>>> >>>>>>>>> --- >>>>>>>>> Best Regards, >>>>>>>>> Misha Komarovskiy >>>>>>>>> zombahatgmaildotcom >>>>>>>>> >>>>>>>>> >>>>>>>>> On Thu, Jul 23, 2015 at 4:29 PM, Alexander Graf <[email protected]> >>>>>>>>> wrote: >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>> Am 23.07.2015 um 15:15 schrieb Andreas Färber <[email protected]>: >>>>>>>>>>> >>>>>>>>>>>> Am 23.07.2015 um 15:12 schrieb Alexander Graf: >>>>>>>>>>>>> >>>>>>>>>>>>> On 07/23/15 14:43, Andreas Färber wrote: >>>>>>>>>>>>>> >>>>>>>>>>>>>> Am 23.07.2015 um 14:22 schrieb Guillaume Gardet: >>>>>>>>>>>>>> Maybe some config options compiled as module (which?) and >>>>>>>>>>>>>> blacklisted >>>>>>>>>>>>>> for chromebooks could be ok? >>>>>>>>>>>>> >>>>>>>>>>>>> Maybe. Someone with a Chromebook needs to sit down and try. :) >>>>>>>>>>>> >>>>>>>>>>>> Hrm, rather than disable it one way or another manually, >>>>>>>>>>>> couldn't >>>>>>>>>>>> we >>>>>>>>>>>> just blacklist it inside the kernel? I doubt that we can load >>>>>>>>>>>> iommu >>>>>>>>>>>> as >>>>>>>>>>>> module... >>>>>>>>>>> >>>>>>>>>>> You mean as in patch the iommu probe code to check for >>>>>>>>>>> "google,snow", >>>>>>>>>>> "google,spring", etc.? >>>>>>>>>> >>>>>>>>>> For example - or remove the respective dt node. Or as a property >>>>>>>>>> to >>>>>>>>>> the >>>>>>>>>> IOMMU dt node... >>>>>>>>>> >>>>>>>>>> Alex >>>>>>>>>> >>>>>>>>>>> Andreas >>>>>>>>>>> >>>>>>>>>>> -- >>>>>>>>>>> SUSE Linux GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany >>>>>>>>>>> GF: Felix Imendörffer, Jane Smithard, Dilip Upmanyu, Graham >>>>>>>>>>> Norton; >>>>>>>>>>> HRB >>>>>>>>>>> 21284 (AG Nürnberg) >>>>>>>>>> >>>>>>>>>> -- >>>>>>>>>> To unsubscribe, e-mail: [email protected] >>>>>>>>>> To contact the owner, e-mail: [email protected] >>>>>>>>>> >
From 553cd6ec5b472aa62d6e268756ecb9f2aa1fb5df Mon Sep 17 00:00:00 2001 From: Misha Komarovskiy <[email protected]> Date: Mon, 17 Aug 2015 17:03:44 +0300 Subject: [PATCH] config: armv7hl: lpae: Disable Exynos IOMMU --- config/armv7hl/lpae | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/config/armv7hl/lpae b/config/armv7hl/lpae index acf6b5a..b4412a3 100644 --- a/config/armv7hl/lpae +++ b/config/armv7hl/lpae @@ -4891,7 +4891,6 @@ CONFIG_DRM_NOUVEAU_BACKLIGHT=y # CONFIG_DRM_SAVAGE is not set CONFIG_DRM_VGEM=m CONFIG_DRM_EXYNOS=m -CONFIG_DRM_EXYNOS_IOMMU=y CONFIG_DRM_EXYNOS_FIMD=y # CONFIG_DRM_EXYNOS7_DECON is not set CONFIG_DRM_EXYNOS_DPI=y @@ -6474,8 +6473,7 @@ CONFIG_OMAP_IOMMU=y CONFIG_OMAP_IOMMU_DEBUG=y CONFIG_ROCKCHIP_IOMMU=y CONFIG_TEGRA_IOMMU_SMMU=y -CONFIG_EXYNOS_IOMMU=y -# CONFIG_EXYNOS_IOMMU_DEBUG is not set +# CONFIG_EXYNOS_IOMMU is not set CONFIG_SHMOBILE_IPMMU=y CONFIG_SHMOBILE_IPMMU_TLB=y CONFIG_SHMOBILE_IOMMU=y -- 1.8.4.5
