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The driver uses drm_gem_shmem_prime_import_no_map() and drm_gem_shmem_dumb_create(), but the Kconfig currently selects DRM_GEM_DMA_HELPER instead of DRM_GEM_SHMEM_HELPER. This causes link failures when DRM_GEM_SHMEM_HELPER is not enabled. Select DRM_GEM_SHMEM_HELPER to fix the build. Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202509220320.gfFZjmyg-lkp@intel.com/ Fixes: c9e70639f591 ("drm: tiny: Add support for Mayqueen Pixpaper e-ink panel") Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Signed-off-by: LiangCheng Wang <zaq14760@gmail.com> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://lore.kernel.org/r/20250922-bar-v1-1-b2a1f54ace82@gmail.com