On Wednesday, 1 August 2018 15:30:41 MSK Kyle Evans wrote: > Dmitry, > > I am testing out your grate-driver repository, gentoo with grate-overlay. > Should this display on a Tegra20? If not then disregard. When > booting the kernel I get a blank screen, no backlight. > > Kernel Head: > 65e787277dab665c0f7de53ae42a7f57474ce0fe (HEAD, grate/master) > iommu/ipmmu-vmsa: Don't register as BUS IOMMU if machine doesn't have > IPMMU-VMSA > > dmesg -t | grep -E 'tegra-dc|tegra-gr2d': > tegra-dc 54200000.dc: failed to probe RGB output: -517 > tegra-dc 54200000.dc: failed to probe RGB output: -517 > tegra-dc 54240000.dc: Linked as a consumer to 54200000.dc > tegra-dc 54240000.dc: coupled to 54200000.dc > tegra-gr2d 54140000.gr2d: failed to get IOMMU group > tegra-gr2d 54140000.gr2d: failed to attach to domain: -19 > > The tegra-dc lines are present on a working, vanilla 4.18-r6 > kenrel. Not sure if the gr2d stuff is related to the blank screen. Hello Kyle, The gr2d error should be related to the blank screen because DRM won't be loaded if some of its devices fail to probe. You shouldn't get that gr2d error with the grate-driver's kernel at all and display should work. Am I understanding correctly that you have a trouble with both vanilla and grate- driver kernels? Could you please show full kernel boot log, your kernel config and device tree of your device? BTW, have you resolved your WiFi driver issue? I've got WiFi working 100% reliably with the upstream driver after making use of "mmc-pwrseq-simple" for the initial HW resetting and it has been working great for last few months. -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
