This patch series splits the fbdev core support in two different Kconfig symbols: FB and FB_CORE. The motivation for this is to allow CONFIG_FB to be disabled, while still using fbcon with the DRM fbdev emulation layer.
The reason for doing this is that now with simpledrm we could just boot with simpledrm -> real DRM driver, without needing any legacy fbdev driver (e.g: efifb or simplefb) even for the early console.
We want to do that in the Fedora kernel, but currently need to keep option CONFIG_FB enabled and all fbdev drivers explicitly disabled, which makes the configuration harder to maintain.
It is a RFC because I'm not that familiar with the fbdev core, but I have tested and works with CONFIG_DRM_FBDEV_EMULATION=y and CONFIG_FB disabled. This config automatically disables all the fbdev drivers that is our goal.
Patch 1/4 is just a clean up, patch 2/4 moves a couple of functions out of fbsysfs.o, that are not related to sysfs attributes creation and finally patch 3/4 makes the fbdev split that is mentioned above.
Patch 4/4 makes the DRM fbdev emulation depend on the new FB_CORE symbol instead of FB. This could be done as a follow-up but for completeness is also included in this series.
Best regards, Javier
Javier Martinez Canillas (4): fbdev: Rename fb_*_device() functions names to match what they do fbdev: Move framebuffer_{alloc,release}() functions to fbmem.c fbdev: Split frame buffer support in FB and FB_CORE symbols drm: Make fbdev emulation depend on FB_CORE instead of FB
arch/x86/Makefile | 2 +- arch/x86/video/Makefile | 2 +- drivers/gpu/drm/Kconfig | 2 +- drivers/video/console/Kconfig | 2 +- drivers/video/fbdev/Kconfig | 57 +++++++++++++--------- drivers/video/fbdev/core/Makefile | 13 +++-- drivers/video/fbdev/core/fbmem.c | 73 ++++++++++++++++++++++++++-- drivers/video/fbdev/core/fbsysfs.c | 77 +----------------------------- include/linux/fb.h | 18 ++++++- 9 files changed, 134 insertions(+), 112 deletions(-)