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 CONFIG_FB_CORE option that could be enabled just to have the core support needed for CONFIG_DRM_FBDEV_EMULATION, allowing CONFIG_FB to be disabled (and automatically disabling all fbdev drivers). Signed-off-by: Javier Martinez Canillas <javierm@xxxxxxxxxx> --- arch/x86/Makefile | 2 +- arch/x86/video/Makefile | 2 +- drivers/video/console/Kconfig | 2 +- drivers/video/fbdev/Kconfig | 62 ++++++++++++++++++------------- drivers/video/fbdev/core/Makefile | 14 +++---- 5 files changed, 47 insertions(+), 35 deletions(-) diff --git a/arch/x86/Makefile b/arch/x86/Makefile index b39975977c03..89a02e69be5f 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -259,7 +259,7 @@ drivers-$(CONFIG_PCI) += arch/x86/pci/ # suspend and hibernation support drivers-$(CONFIG_PM) += arch/x86/power/ -drivers-$(CONFIG_FB) += arch/x86/video/ +drivers-$(CONFIG_FB_CORE) += arch/x86/video/ #### # boot loader support. Several targets are kept for legacy purposes diff --git a/arch/x86/video/Makefile b/arch/x86/video/Makefile index 11640c116115..5ebe48752ffc 100644 --- a/arch/x86/video/Makefile +++ b/arch/x86/video/Makefile @@ -1,2 +1,2 @@ # SPDX-License-Identifier: GPL-2.0-only -obj-$(CONFIG_FB) += fbdev.o +obj-$(CONFIG_FB_CORE) += fbdev.o diff --git a/drivers/video/console/Kconfig b/drivers/video/console/Kconfig index a2a88d42edf0..1b5a319971ed 100644 --- a/drivers/video/console/Kconfig +++ b/drivers/video/console/Kconfig @@ -72,7 +72,7 @@ config DUMMY_CONSOLE_ROWS config FRAMEBUFFER_CONSOLE bool "Framebuffer Console support" - depends on FB && !UML + depends on FB_CORE && !UML select VT_HW_CONSOLE_BINDING select CRC32 select FONT_SUPPORT diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig index cecf15418632..74d7a305657a 100644 --- a/drivers/video/fbdev/Kconfig +++ b/drivers/video/fbdev/Kconfig @@ -6,10 +6,8 @@ config FB_NOTIFY bool -menuconfig FB - tristate "Support for frame buffer devices" - select FB_NOTIFY - select VIDEO_CMDLINE +menuconfig FB_CORE + tristate "Core support for frame buffer devices" help The frame buffer device provides an abstraction for the graphics hardware. It represents the frame buffer of some video hardware and @@ -33,6 +31,20 @@ menuconfig FB <http://www.munted.org.uk/programming/Framebuffer-HOWTO-1.3.html> for more information. + This options enables the core support for frame buffer devices. + +menuconfig FB + tristate "Support for frame buffer device drivers" + depends on FB_CORE + select FB_NOTIFY + select VIDEO_CMDLINE + help + This enables support for native frame buffer device (fbdev) drivers. + + The DRM subsystem provides support for emulated frame buffer devices + on top of KMS drivers, but this option allows legacy fbdev drivers to + be enabled as well. + Say Y here and to the driver for your graphics board below if you are compiling a kernel for a non-x86 architecture. @@ -44,7 +56,7 @@ menuconfig FB config FIRMWARE_EDID bool "Enable firmware EDID" - depends on FB + depends on FB_CORE help This enables access to the EDID transferred from the firmware. On the i386, this is from the Video BIOS. Enable this if DDC/I2C @@ -59,7 +71,7 @@ config FIRMWARE_EDID config FB_DEVICE bool "Provide legacy /dev/fb* device" - depends on FB + depends on FB_CORE default y help Say Y here if you want the legacy /dev/fb* device file and @@ -69,13 +81,13 @@ config FB_DEVICE config FB_DDC tristate - depends on FB + depends on FB_CORE select I2C_ALGOBIT select I2C config FB_CFB_FILLRECT tristate - depends on FB + depends on FB_CORE help Include the cfb_fillrect function for generic software rectangle filling. This is used by drivers that don't provide their own @@ -83,7 +95,7 @@ config FB_CFB_FILLRECT config FB_CFB_COPYAREA tristate - depends on FB + depends on FB_CORE help Include the cfb_copyarea function for generic software area copying. This is used by drivers that don't provide their own (accelerated) @@ -91,7 +103,7 @@ config FB_CFB_COPYAREA config FB_CFB_IMAGEBLIT tristate - depends on FB + depends on FB_CORE help Include the cfb_imageblit function for generic software image blitting. This is used by drivers that don't provide their own @@ -99,7 +111,7 @@ config FB_CFB_IMAGEBLIT config FB_CFB_REV_PIXELS_IN_BYTE bool - depends on FB + depends on FB_CORE help Allow generic frame-buffer functions to work on displays with 1, 2 and 4 bits per pixel depths which has opposite order of pixels in @@ -107,7 +119,7 @@ config FB_CFB_REV_PIXELS_IN_BYTE config FB_SYS_FILLRECT tristate - depends on FB + depends on FB_CORE help Include the sys_fillrect function for generic software rectangle filling. This is used by drivers that don't provide their own @@ -115,7 +127,7 @@ config FB_SYS_FILLRECT config FB_SYS_COPYAREA tristate - depends on FB + depends on FB_CORE help Include the sys_copyarea function for generic software area copying. This is used by drivers that don't provide their own (accelerated) @@ -123,7 +135,7 @@ config FB_SYS_COPYAREA config FB_SYS_IMAGEBLIT tristate - depends on FB + depends on FB_CORE help Include the sys_imageblit function for generic software image blitting. This is used by drivers that don't provide their own @@ -162,22 +174,22 @@ endchoice config FB_SYS_FOPS tristate - depends on FB + depends on FB_CORE config FB_DEFERRED_IO bool - depends on FB + depends on FB_CORE config FB_IO_HELPERS bool - depends on FB + depends on FB_CORE select FB_CFB_COPYAREA select FB_CFB_FILLRECT select FB_CFB_IMAGEBLIT config FB_SYS_HELPERS bool - depends on FB + depends on FB_CORE select FB_SYS_COPYAREA select FB_SYS_FILLRECT select FB_SYS_FOPS @@ -185,34 +197,34 @@ config FB_SYS_HELPERS config FB_SYS_HELPERS_DEFERRED bool - depends on FB + depends on FB_CORE select FB_DEFERRED_IO select FB_SYS_HELPERS config FB_HECUBA tristate - depends on FB + depends on FB_CORE depends on FB_DEFERRED_IO config FB_SVGALIB tristate - depends on FB + depends on FB_CORE help Common utility functions useful to fbdev drivers of VGA-based cards. config FB_MACMODES tristate - depends on FB + depends on FB_CORE config FB_BACKLIGHT tristate - depends on FB + depends on FB_CORE select BACKLIGHT_CLASS_DEVICE config FB_MODE_HELPERS bool "Enable Video Mode Handling Helpers" - depends on FB + depends on FB_CORE help This enables functions for handling video modes using the Generalized Timing Formula and the EDID parser. A few drivers rely @@ -222,7 +234,7 @@ config FB_MODE_HELPERS config FB_TILEBLITTING bool "Enable Tile Blitting Support" - depends on FB + depends on FB_CORE help This enables tile blitting. Tile blitting is a drawing technique where the screen is divided into rectangular sections (tiles), whereas diff --git a/drivers/video/fbdev/core/Makefile b/drivers/video/fbdev/core/Makefile index 9150bafd9e89..88ef39dad03b 100644 --- a/drivers/video/fbdev/core/Makefile +++ b/drivers/video/fbdev/core/Makefile @@ -1,22 +1,22 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_FB_NOTIFY) += fb_notify.o -obj-$(CONFIG_FB) += fb.o -fb-y := fb_backlight.o \ +obj-$(CONFIG_FB_CORE) += fb_core.o +fb_core-y := fb_backlight.o \ fb_info.o \ fbmem.o fbmon.o fbcmap.o \ modedb.o fbcvt.o fb_cmdline.o fb_io_fops.o -fb-$(CONFIG_FB_DEFERRED_IO) += fb_defio.o -fb-$(CONFIG_FB_DEVICE) += fb_chrdev.o \ +fb_core-$(CONFIG_FB_DEFERRED_IO) += fb_defio.o +fb_core-$(CONFIG_FB_DEVICE) += fb_chrdev.o \ fb_procfs.o \ fbsysfs.o ifeq ($(CONFIG_FRAMEBUFFER_CONSOLE),y) -fb-y += fbcon.o bitblit.o softcursor.o +fb_core-y += fbcon.o bitblit.o softcursor.o ifeq ($(CONFIG_FB_TILEBLITTING),y) -fb-y += tileblit.o +fb_core-y += tileblit.o endif ifeq ($(CONFIG_FRAMEBUFFER_CONSOLE_ROTATION),y) -fb-y += fbcon_rotate.o fbcon_cw.o fbcon_ud.o \ +fb_core-y += fbcon_rotate.o fbcon_cw.o fbcon_ud.o \ fbcon_ccw.o endif endif -- 2.41.0
