GPIO_RESULT_NULL_HANDLE 86 drivers/gpu/drm/amd/display/dc/gpio/gpio_base.c return GPIO_RESULT_NULL_HANDLE; GPIO_RESULT_NULL_HANDLE 98 drivers/gpu/drm/amd/display/dc/gpio/gpio_base.c return GPIO_RESULT_NULL_HANDLE; GPIO_RESULT_NULL_HANDLE 128 drivers/gpu/drm/amd/display/dc/gpio/gpio_base.c return GPIO_RESULT_NULL_HANDLE; GPIO_RESULT_NULL_HANDLE 152 drivers/gpu/drm/amd/display/dc/gpio/gpio_base.c return GPIO_RESULT_NULL_HANDLE; GPIO_RESULT_NULL_HANDLE 84 drivers/gpu/drm/amd/display/dc/gpio/hw_ddc.c return GPIO_RESULT_NULL_HANDLE;