On Tue, Jul 04, 2023 at 01:05:28AM +0200, Javier Martinez Canillas wrote: > Currently the CONFIG_FB option has to be enabled even if no legacy fbdev > drivers are needed (e.g: only to have support for framebuffer consoles). > > The DRM subsystem has a fbdev emulation layer, but depends on CONFIG_FB > and so it can only be enabled if that dependency is enabled as well. > > That means fbdev drivers have to be explicitly disabled if users want to > enable CONFIG_FB, only to use fbcon and/or the DRM fbdev emulation layer. > > This patch introduces a non-visible CONFIG_FB_CORE symbol that could be > enabled just to have core support needed for CONFIG_DRM_FBDEV_EMULATION, > allowing CONFIG_FB to be disabled (and automatically disabling all the > fbdev drivers). > > Nothing from fb_backlight.o and fbmon.o is used by the DRM fbdev emulation > layer so these two objects can be compiled out when CONFIG_FB is disabled.
... Wondering if if FB_CORE ... endif makes Kconfig looking better instead of replacing all these "depends on" lines. > config FB_DEVICE > bool "Provide legacy /dev/fb* device" > - depends on FB > + depends on FB_CORE > default y -- With Best Regards, Andy Shevchenko
