# SPDX-License-Identifier: GPL-2.0-only## fbdev core configuration# config FB_CORE	select VIDEO	tristate config FB_NOTIFY	bool config FB_DEVICE	bool "Provide legacy /dev/fb* device"	depends on FB_CORE	default FB	help	  Say Y here if you want the legacy /dev/fb* device file and	  interfaces within sysfs and procfs. It is only required if you	  have userspace programs that depend on fbdev for graphics output.	  This does not affect the framebuffer console. If unsure, say N. config FB_DDC	tristate	depends on FB	select I2C_ALGOBIT	select I2C config FB_CFB_FILLRECT	tristate	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	  (accelerated) version. config FB_CFB_COPYAREA	tristate	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)	  version. config FB_CFB_IMAGEBLIT	tristate	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	  (accelerated) version. config FB_CFB_REV_PIXELS_IN_BYTE	bool	depends on FB_CORE	help	  Allow I/O memory frame-buffer functions to work on displays with 1, 2	  and 4 bits per pixel depths which has opposite order of pixels in	  byte order to bytes in long order. config FB_SYS_FILLRECT	tristate	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	  (accelerated) version and the framebuffer is in system RAM. config FB_SYS_COPYAREA	tristate	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)	  version and the framebuffer is in system RAM. config FB_SYS_IMAGEBLIT	tristate	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	  (accelerated) version and the framebuffer is in system RAM. config FB_SYS_REV_PIXELS_IN_BYTE	bool	depends on FB_CORE	help	  Allow virtual memory frame-buffer functions to work on displays with 1, 2	  and 4 bits per pixel depths which has opposite order of pixels in	  byte order to bytes in long order. config FB_PROVIDE_GET_FB_UNMAPPED_AREA	bool	depends on FB	help	  Allow generic frame-buffer to provide get_fb_unmapped_area	  function to provide shareable character device support on nommu. menuconfig FB_FOREIGN_ENDIAN	bool "Framebuffer foreign endianness support"	depends on FB	help	  This menu will let you enable support for the framebuffers with	  non-native endianness (e.g. Little-Endian framebuffer on a	  Big-Endian machine). Most probably you don't have such hardware,	  so it's safe to say "n" here. choice	prompt "Choice endianness support"	depends on FB_FOREIGN_ENDIAN config FB_BOTH_ENDIAN	bool "Support for Big- and Little-Endian framebuffers" config FB_BIG_ENDIAN	bool "Support for Big-Endian framebuffers only" config FB_LITTLE_ENDIAN	bool "Support for Little-Endian framebuffers only" endchoice config FB_SYSMEM_FOPS	tristate	depends on FB_CORE config FB_DEFERRED_IO	bool	depends on FB_CORE config FB_DMAMEM_HELPERS	bool	depends on FB_CORE	select FB_SYS_COPYAREA	select FB_SYS_FILLRECT	select FB_SYS_IMAGEBLIT	select FB_SYSMEM_FOPS config FB_DMAMEM_HELPERS_DEFERRED	bool	depends on FB_CORE	select FB_DEFERRED_IO	select FB_DMAMEM_HELPERS config FB_IOMEM_FOPS	tristate	depends on FB_CORE config FB_IOMEM_HELPERS	bool	depends on FB_CORE	select FB_CFB_COPYAREA	select FB_CFB_FILLRECT	select FB_CFB_IMAGEBLIT	select FB_IOMEM_FOPS config FB_IOMEM_HELPERS_DEFERRED	bool	depends on FB_CORE	select FB_DEFERRED_IO	select FB_IOMEM_HELPERS config FB_SYSMEM_HELPERS	bool	depends on FB_CORE	select FB_SYS_COPYAREA	select FB_SYS_FILLRECT	select FB_SYS_IMAGEBLIT	select FB_SYSMEM_FOPS config FB_SYSMEM_HELPERS_DEFERRED	bool	depends on FB_CORE	select FB_DEFERRED_IO	select FB_SYSMEM_HELPERS config FB_BACKLIGHT	bool	depends on FB config FB_MODE_HELPERS	bool	depends on FB	help	  This enables functions for handling video modes using the	  Generalized Timing Formula and the EDID parser. A few drivers rely	  on this feature such as the radeonfb, rivafb, and the i810fb. If	  your driver does not take advantage of this feature, choosing Y will	  just increase the kernel size by about 5K. config FB_TILEBLITTING	bool "Enable Tile Blitting Support"	depends on FB	help	  This enables tile blitting.  Tile blitting is a drawing technique	  where the screen is divided into rectangular sections (tiles), whereas	  the standard blitting divides the screen into pixels. Because the	  default drawing element is a tile, drawing functions will be passed	  parameters in terms of number of tiles instead of number of pixels.	  For example, to draw a single character, instead of using bitmaps,	  an index to an array of bitmaps will be used.  To clear or move a	  rectangular section of a screen, the rectangle will be described in	  terms of number of tiles in the x- and y-axis. 	  This is particularly important to one driver, matroxfb.  If	  unsure, say N.