Document drm_dma_helper dependency for loading fl2000

[NhlalukoG]

Summary

• Document that fl2000 depends on drm_dma_helper and must have it loaded before insmod, since insmod does not resolve module dependencies.
• Reorder the README so DRM helpers are loaded before inserting the driver modules.
• Fix the ./scritps/sign.sh typo to ./scripts/sign.sh.

Without drm_dma_helper, loading fails with unknown symbols such as drm_fb_dma_get_gem_obj / drm_gem_dma_dumb_create.

Test plan

• Follow the updated README on a clean boot (without drm_dma_helper already loaded)
• Confirm modprobe drm_dma_helper then insmod fl2000.ko && insmod it66121.ko succeeds
• Confirm lsmod shows fl2000 depending on drm_dma_helper

Made with Cursor

[gemini-code-assist]

Code Review

This pull request updates the README.md to correct the setup instructions, including adding drm_dma_helper to the required DRM components and fixing a typo in the signing script path. The review feedback recommends reordering the instructions so that kernel module signing is performed before attempting to load the modules when secure boot is enabled, and suggests running the signing script with sudo.

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[gemini-code-assist]

If secure boot is enabled, the kernel modules must be signed before attempting to load them with insmod, otherwise the load will fail immediately. Additionally, the signing script accesses /var/lib/shim-signed/mok, which typically requires root privileges, so it should be run with sudo.

Suggested reordering:

If you are running on a system with secure boot enabled, you may need to sign the kernel modules first. Try using the provided script for this (usually requires sudo):

sudo ./scripts/sign.sh

Then use:

sudo insmod fl2000.ko && sudo insmod it66121.ko

to start the driver (or run in a root shell).