Hi all, I've been battling with upgrading the kernel our imx6qdl based custom board using Yocto Thud. We have been happily running the linux-imx 4.1-2 kernel, but it's time to push it forward to the 4.9.x versions. But it's not booting, at all. I've be poring over changes to other imxqdl based device trees and defconfigs, and nothing is making sense as to what change I may have missed (because I can't find many). We are running U-Boot 2017.11 (I know that could also be upgraded, but that shouldn't matter...unless I'm wrong).
I've stripped our kernel customizations down to nothing except for our board device tree, which works fine in kernel 4.1-X. We've never had issues like this with a kernel version bump before. After U-Boot loads the device tree and kernel, there is no output. When I check the HW, I've probed the DDR clock and it's stuck high. All 4.9+ kernels included in meta-freescale behave this same way: ## Booting kernel from Legacy Image at 10800000 ... Image Name: Linux-4.9.123-imx+g6a71cbc Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 5476256 Bytes = 5.2 MiB Load Address: 10808000 Entry Point: 10808000 Verifying Checksum ... OK ## Flattened Device Tree blob at 11000000 Booting using the fdt blob at 0x11000000 Loading Kernel Image ... OK Using Device Tree in place at 11000000, end 1100dd66 Starting kernel ... ## NOTHING AFTER THIS ## My main question is, has anyone else successfully used the linux-imx 4.9.x kernels (4.9.11, 4.9.123, etc), on a board based on the imx6qdl, and if so, do you have any tricks I'm missing? Has something major changed in 4.9.x that affects the imx6 that I may have missed? (except for the framebuffer, that's another issue I'll deal with later). I appreciate any guidance! Cheers, Cory
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