Symbol: GPIO_DDC_LINE_UNKNOWN
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
1169
else if (link->ddc_hw_inst == GPIO_DDC_LINE_UNKNOWN &&
drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c
650
return GPIO_DDC_LINE_UNKNOWN;