TX2 r28.1 kernel build error.

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

I got “error: implicit declaration of function ‘match_string’” when i choose CONFIG_DRM_LOAD_EDID_FIRMWARE and rebuild kernel.

Detailed info:
drivers/gpu/drm/drm_edid_load.c: In function ‘edid_load’:
drivers/gpu/drm/drm_edid_load.c:173:12: error: implicit declaration of function ‘match_string’ [-Werror=implicit-function-declaration]
builtin = match_string(generic_edid_name, GENERIC_EDIDS, name);
^
cc1: some warnings being treated as errors
scripts/Makefile.build:261: recipe for target ‘drivers/gpu/drm/drm_edid_load.o’ failed

What did I miss?

2

suchb,

I don’t think you should enable that config in kernel. drivers/gpu/drm is not in used for L4T.

3

Thanks！

I do not understand what is ‘drivers/gpu/drm is not in used for L4T’.

If not used why the file be compile when I choose that config.

According to you,so,kernel-4.4/drivers/gpu/drm/drm_edid_load.c is not in used too.

EDID things is under this folder? kernel/display/drivers/video/tegra/dc/

Looking forward to your reply.

4

suchb,

Yes, it may be indeed being built into kernel image, but tegra does not use these functions at all.

For display driver, please refer to kernel/display/drivers/video/tegra/dc/ and kernel/t18x/drivers/video/tegra/dc