DRM_STM breaks fbdev mmap on ARCH_MULTIPLATFORM

Hi

DRM_STM is 'default y' on ARCH_MULTIPLATFORM and it selects FB_PROVIDE_GET_FB_UNMAPPED_AREA. This breaks fbdev mmap for me on Raspberry Pi. mmap returns -ENOMEM.

Disabling DRM_STM gives me working mmap.

Noralf.

config DRM_STM tristate "DRM Support for STMicroelectronics SoC Series" depends on DRM && (ARCH_STM32 || ARCH_MULTIPLATFORM) select DRM_KMS_HELPER select DRM_GEM_CMA_HELPER select DRM_KMS_CMA_HELPER select DRM_PANEL select VIDEOMODE_HELPERS select FB_PROVIDE_GET_FB_UNMAPPED_AREA default y

help Enable support for the on-chip display controller on STMicroelectronics STM32 MCUs. To compile this driver as a module, choose M here: the module will be called stm-drm.