On Mon, Dec 16, 2024, at 08:42, Thomas Zimmermann wrote: > Fix the dependencies among the various graphics modules. > > Before addressing the FB_CORE issue, patch 1 first resolves a problem > with BACKLIGHT_CLASS_DEVICE. A number of fbdev drivers select it, which > results in a recursive-dependency error after patch has been applied. > Making these drivers (or parts of them) depend on BACKLIGHT_CLASS_DEVICE > fixes this. > > Patch 2 selects FB_CORE for DRM_GEM_DMA_HELPER and DRM_TTM_HELPER. > This is necessary with the recently added DRM client library. > > Patch 3 is the second half of the patch provided by Arnd at [1]. It > could not yet be merged because of the issues fixed by patch 1. > > Side note: For the majority of graphics drivers, backlight functionality > depends on BACKLIGHT_CLASS_DEVICE. In a few cases drivers select the > Kconfig token automatically. These drivers should be updated to depend > on the token as well, such that backlight functionality is fully user- > controlled. > > v3: > - Fix PMAC_BACKLIGHT case (Christophe) > v2: The patches look good to me. I've had a slightly different version in my randconfig test tree and have replaced it with yours now to do some more regression testing, but I expect this to be fine. Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>
