Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1# SPDX-License-Identifier: GPL-2.0-only
2#
3# fbdev core configuration
4#
5
6config FB_CORE
7 select VIDEO_CMDLINE
8 tristate
9
10config FB_NOTIFY
11 bool
12
13config FIRMWARE_EDID
14 bool "Enable firmware EDID"
15 depends on FB
16 help
17 This enables access to the EDID transferred from the firmware.
18 On the i386, this is from the Video BIOS. Enable this if DDC/I2C
19 transfers do not work for your driver and if you are using
20 nvidiafb, i810fb or savagefb.
21
22 In general, choosing Y for this option is safe. If you
23 experience extremely long delays while booting before you get
24 something on your display, try setting this to N. Matrox cards in
25 combination with certain motherboards and monitors are known to
26 suffer from this problem.
27
28config FB_DEVICE
29 bool "Provide legacy /dev/fb* device"
30 depends on FB_CORE
31 default y
32 help
33 Say Y here if you want the legacy /dev/fb* device file and
34 interfaces within sysfs anc procfs. It is only required if you
35 have userspace programs that depend on fbdev for graphics output.
36 This does not affect the framebuffer console. If unsure, say N.
37
38config FB_DDC
39 tristate
40 depends on FB
41 select I2C_ALGOBIT
42 select I2C
43
44config FB_CFB_FILLRECT
45 tristate
46 depends on FB_CORE
47 help
48 Include the cfb_fillrect function for generic software rectangle
49 filling. This is used by drivers that don't provide their own
50 (accelerated) version.
51
52config FB_CFB_COPYAREA
53 tristate
54 depends on FB_CORE
55 help
56 Include the cfb_copyarea function for generic software area copying.
57 This is used by drivers that don't provide their own (accelerated)
58 version.
59
60config FB_CFB_IMAGEBLIT
61 tristate
62 depends on FB_CORE
63 help
64 Include the cfb_imageblit function for generic software image
65 blitting. This is used by drivers that don't provide their own
66 (accelerated) version.
67
68config FB_CFB_REV_PIXELS_IN_BYTE
69 bool
70 depends on FB_CORE
71 help
72 Allow generic frame-buffer functions to work on displays with 1, 2
73 and 4 bits per pixel depths which has opposite order of pixels in
74 byte order to bytes in long order.
75
76config FB_SYS_FILLRECT
77 tristate
78 depends on FB_CORE
79 help
80 Include the sys_fillrect function for generic software rectangle
81 filling. This is used by drivers that don't provide their own
82 (accelerated) version and the framebuffer is in system RAM.
83
84config FB_SYS_COPYAREA
85 tristate
86 depends on FB_CORE
87 help
88 Include the sys_copyarea function for generic software area copying.
89 This is used by drivers that don't provide their own (accelerated)
90 version and the framebuffer is in system RAM.
91
92config FB_SYS_IMAGEBLIT
93 tristate
94 depends on FB_CORE
95 help
96 Include the sys_imageblit function for generic software image
97 blitting. This is used by drivers that don't provide their own
98 (accelerated) version and the framebuffer is in system RAM.
99
100config FB_PROVIDE_GET_FB_UNMAPPED_AREA
101 bool
102 depends on FB
103 help
104 Allow generic frame-buffer to provide get_fb_unmapped_area
105 function to provide shareable character device support on nommu.
106
107menuconfig FB_FOREIGN_ENDIAN
108 bool "Framebuffer foreign endianness support"
109 depends on FB
110 help
111 This menu will let you enable support for the framebuffers with
112 non-native endianness (e.g. Little-Endian framebuffer on a
113 Big-Endian machine). Most probably you don't have such hardware,
114 so it's safe to say "n" here.
115
116choice
117 prompt "Choice endianness support"
118 depends on FB_FOREIGN_ENDIAN
119
120config FB_BOTH_ENDIAN
121 bool "Support for Big- and Little-Endian framebuffers"
122
123config FB_BIG_ENDIAN
124 bool "Support for Big-Endian framebuffers only"
125
126config FB_LITTLE_ENDIAN
127 bool "Support for Little-Endian framebuffers only"
128
129endchoice
130
131config FB_SYS_FOPS
132 tristate
133 depends on FB_CORE
134
135config FB_DEFERRED_IO
136 bool
137 depends on FB_CORE
138
139config FB_DMAMEM_HELPERS
140 bool
141 depends on FB_CORE
142 select FB_SYS_COPYAREA
143 select FB_SYS_FILLRECT
144 select FB_SYS_FOPS
145 select FB_SYS_IMAGEBLIT
146
147config FB_IOMEM_HELPERS
148 bool
149 depends on FB_CORE
150 select FB_CFB_COPYAREA
151 select FB_CFB_FILLRECT
152 select FB_CFB_IMAGEBLIT
153
154config FB_SYSMEM_HELPERS
155 bool
156 depends on FB_CORE
157 select FB_SYS_COPYAREA
158 select FB_SYS_FILLRECT
159 select FB_SYS_FOPS
160 select FB_SYS_IMAGEBLIT
161
162config FB_SYSMEM_HELPERS_DEFERRED
163 bool
164 depends on FB_CORE
165 select FB_DEFERRED_IO
166 select FB_SYSMEM_HELPERS
167
168config FB_BACKLIGHT
169 tristate
170 depends on FB
171 select BACKLIGHT_CLASS_DEVICE
172
173config FB_MODE_HELPERS
174 bool "Enable Video Mode Handling Helpers"
175 depends on FB
176 help
177 This enables functions for handling video modes using the
178 Generalized Timing Formula and the EDID parser. A few drivers rely
179 on this feature such as the radeonfb, rivafb, and the i810fb. If
180 your driver does not take advantage of this feature, choosing Y will
181 just increase the kernel size by about 5K.
182
183config FB_TILEBLITTING
184 bool "Enable Tile Blitting Support"
185 depends on FB
186 help
187 This enables tile blitting. Tile blitting is a drawing technique
188 where the screen is divided into rectangular sections (tiles), whereas
189 the standard blitting divides the screen into pixels. Because the
190 default drawing element is a tile, drawing functions will be passed
191 parameters in terms of number of tiles instead of number of pixels.
192 For example, to draw a single character, instead of using bitmaps,
193 an index to an array of bitmaps will be used. To clear or move a
194 rectangular section of a screen, the rectangle will be described in
195 terms of number of tiles in the x- and y-axis.
196
197 This is particularly important to one driver, matroxfb. If
198 unsure, say N.