Commit 808a40b69468 ("drm/fbdev-dma: Implement damage handling and deferred I/O") added deferred I/O for fbdev-dma. Also select the Kconfig symbol FB_DEFERRED_IO (via FB_DMAMEM_HELPERS_DEFERRED). Fixes build errors about missing fbdefio, such as

drivers/gpu/drm/drm_fbdev_dma.c:218:26: error: 'struct drm_fb_helper' has no member named 'fbdefio' 218 | fb_helper->fbdefio.delay = HZ / 20; | ^~ drivers/gpu/drm/drm_fbdev_dma.c:219:26: error: 'struct drm_fb_helper' has no member named 'fbdefio' 219 | fb_helper->fbdefio.deferred_io = drm_fb_helper_deferred_io; | ^~ drivers/gpu/drm/drm_fbdev_dma.c:221:21: error: 'struct fb_info' has no member named 'fbdefio' 221 | info->fbdefio = &fb_helper->fbdefio; | ^~ drivers/gpu/drm/drm_fbdev_dma.c:221:43: error: 'struct drm_fb_helper' has no member named 'fbdefio' 221 | info->fbdefio = &fb_helper->fbdefio; | ^~

Signed-off-by: Thomas Zimmermann tzimmermann@suse.de Reported-by: kernel test robot lkp@intel.com Closes: https://lore.kernel.org/oe-kbuild-all/202410050241.Mox9QRjP-lkp@intel.com/ Fixes: 808a40b69468 ("drm/fbdev-dma: Implement damage handling and deferred I/O") Cc: Thomas Zimmermann tzimmermann@suse.de Cc: Javier Martinez Canillas javierm@redhat.com Cc: Maarten Lankhorst maarten.lankhorst@linux.intel.com Cc: Maxime Ripard mripard@kernel.org Cc: stable@vger.kernel.org # v6.11+ Reviewed-by: Jonathan Cavitt jonathan.cavitt@intel.com --- drivers/gpu/drm/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index 1df4e627e3d3..db2e206a117c 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -338,7 +338,7 @@ config DRM_TTM_HELPER config DRM_GEM_DMA_HELPER tristate depends on DRM - select FB_DMAMEM_HELPERS if DRM_FBDEV_EMULATION + select FB_DMAMEM_HELPERS_DEFERRED if DRM_FBDEV_EMULATION help Choose this if you need the GEM DMA helper functions