I am trying to setup Intel's new open-source iHD driver on a Yocto environment.
https://software.intel.com/en-us/articles/build-and-debug-open-source-media-stack The documentation says that skl_dmc_ver1_27.bin is required. Their documentation updates a symlink (skl_dmc_ver1.bin), as if the kernel loads it, but starting at kernel 4.8, it stopped loading the symlink and instead loads a specific version of the dmc (see here: https://github.com/torvalds/linux/blob/v4.8/drivers/gpu/drm/i915/intel_csr.c#L48). Is the Intel documentation accurate? It is confusing because the guide refers to 4.14.16 specifically, which doesn't use the symlink file skl_dmc_ver1.bin. Any ways, I tried replacing skl_dmc_ver1_26.bin with skl_dmc_ver1_27.bin to have the same effect, but I got a segfault on boot. https://pastebin.com/amW9vDdC Should I even bother updating the DMC? Should the iHD driver work on most kernels, even with 1_26 version of DMC? By the way, this is the kernel I am using (with Yocto). https://github.com/intel/linux-intel-lts/tree/4.14/yocto/base/drivers/gpu/drm/i915 Any help would be greatly appreciated. There is no documentation on this stuff.
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