1# SPDX-License-Identifier: GPL-2.0-only 2# 3# Video configuration 4# 5 6menu "Console display driver support" 7 8config VGA_CONSOLE 9 bool "VGA text console" if EXPERT || !X86 10 depends on !4xx && !PPC_8xx && !SPARC && !M68K && !PARISC && !SUPERH && \ 11 (!ARM || ARCH_FOOTBRIDGE || ARCH_INTEGRATOR || ARCH_NETWINDER) && \ 12 !ARM64 && !ARC && !MICROBLAZE && !OPENRISC && !NDS32 && !S390 13 default y 14 help 15 Saying Y here will allow you to use Linux in text mode through a 16 display that complies with the generic VGA standard. Virtually 17 everyone wants that. 18 19 The program SVGATextMode can be used to utilize SVGA video cards to 20 their full potential in text mode. Download it from 21 <ftp://ibiblio.org/pub/Linux/utils/console/>. 22 23 Say Y. 24 25config VGACON_SOFT_SCROLLBACK 26 bool "Enable Scrollback Buffer in System RAM" 27 depends on VGA_CONSOLE 28 default n 29 help 30 The scrollback buffer of the standard VGA console is located in 31 the VGA RAM. The size of this RAM is fixed and is quite small. 32 If you require a larger scrollback buffer, this can be placed in 33 System RAM which is dynamically allocated during initialization. 34 Placing the scrollback buffer in System RAM will slightly slow 35 down the console. 36 37 If you want this feature, say 'Y' here and enter the amount of 38 RAM to allocate for this buffer. If unsure, say 'N'. 39 40config VGACON_SOFT_SCROLLBACK_SIZE 41 int "Scrollback Buffer Size (in KB)" 42 depends on VGACON_SOFT_SCROLLBACK 43 range 1 1024 44 default "64" 45 help 46 Enter the amount of System RAM to allocate for scrollback 47 buffers of VGA consoles. Each 64KB will give you approximately 48 16 80x25 screenfuls of scrollback buffer. 49 50config VGACON_SOFT_SCROLLBACK_PERSISTENT_ENABLE_BY_DEFAULT 51 bool "Persistent Scrollback History for each console by default" 52 depends on VGACON_SOFT_SCROLLBACK 53 default n 54 help 55 Say Y here if the scrollback history should persist by default when 56 switching between consoles. Otherwise, the scrollback history will be 57 flushed each time the console is switched. This feature can also be 58 enabled using the boot command line parameter 59 'vgacon.scrollback_persistent=1'. 60 61 This feature might break your tool of choice to flush the scrollback 62 buffer, e.g. clear(1) will work fine but Debian's clear_console(1) 63 will be broken, which might cause security issues. 64 You can use the escape sequence \e[3J instead if this feature is 65 activated. 66 67 Note that a buffer of VGACON_SOFT_SCROLLBACK_SIZE is taken for each 68 created tty device. 69 So if you use a RAM-constrained system, say N here. 70 71config MDA_CONSOLE 72 depends on !M68K && !PARISC && ISA 73 tristate "MDA text console (dual-headed)" 74 ---help--- 75 Say Y here if you have an old MDA or monochrome Hercules graphics 76 adapter in your system acting as a second head ( = video card). You 77 will then be able to use two monitors with your Linux system. Do not 78 say Y here if your MDA card is the primary card in your system; the 79 normal VGA driver will handle it. 80 81 To compile this driver as a module, choose M here: the 82 module will be called mdacon. 83 84 If unsure, say N. 85 86config SGI_NEWPORT_CONSOLE 87 tristate "SGI Newport Console support" 88 depends on SGI_IP22 && HAS_IOMEM 89 select FONT_SUPPORT 90 help 91 Say Y here if you want the console on the Newport aka XL graphics 92 card of your Indy. Most people say Y here. 93 94config DUMMY_CONSOLE 95 bool 96 depends on VGA_CONSOLE!=y || SGI_NEWPORT_CONSOLE!=y 97 default y 98 99config DUMMY_CONSOLE_COLUMNS 100 int "Initial number of console screen columns" 101 depends on DUMMY_CONSOLE && !ARM 102 default 160 if PARISC 103 default 80 104 help 105 On PA-RISC, the default value is 160, which should fit a 1280x1024 106 monitor. 107 Select 80 if you use a 640x480 resolution by default. 108 109config DUMMY_CONSOLE_ROWS 110 int "Initial number of console screen rows" 111 depends on DUMMY_CONSOLE && !ARM 112 default 64 if PARISC 113 default 25 114 help 115 On PA-RISC, the default value is 64, which should fit a 1280x1024 116 monitor. 117 Select 25 if you use a 640x480 resolution by default. 118 119config FRAMEBUFFER_CONSOLE 120 bool "Framebuffer Console support" 121 depends on FB && !UML 122 select VT_HW_CONSOLE_BINDING 123 select CRC32 124 select FONT_SUPPORT 125 help 126 Low-level framebuffer-based console driver. 127 128config FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 129 bool "Map the console to the primary display device" 130 depends on FRAMEBUFFER_CONSOLE 131 default n 132 ---help--- 133 If this option is selected, the framebuffer console will 134 automatically select the primary display device (if the architecture 135 supports this feature). Otherwise, the framebuffer console will 136 always select the first framebuffer driver that is loaded. The latter 137 is the default behavior. 138 139 You can always override the automatic selection of the primary device 140 by using the fbcon=map: boot option. 141 142 If unsure, select n. 143 144config FRAMEBUFFER_CONSOLE_ROTATION 145 bool "Framebuffer Console Rotation" 146 depends on FRAMEBUFFER_CONSOLE 147 help 148 Enable display rotation for the framebuffer console. This is done 149 in software and may be significantly slower than a normally oriented 150 display. Note that the rotation is done at the console level only 151 such that other users of the framebuffer will remain normally 152 oriented. 153 154config FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 155 bool "Framebuffer Console Deferred Takeover" 156 depends on FB=y && FRAMEBUFFER_CONSOLE && DUMMY_CONSOLE 157 help 158 If enabled this defers the framebuffer console taking over the 159 console from the dummy console until the first text is displayed on 160 the console. This is useful in combination with the "quiet" kernel 161 commandline option to keep the framebuffer contents initially put up 162 by the firmware in place, rather then replacing the contents with a 163 black screen as soon as fbcon loads. 164 165config STI_CONSOLE 166 bool "STI text console" 167 depends on PARISC && HAS_IOMEM 168 select FONT_SUPPORT 169 default y 170 help 171 The STI console is the builtin display/keyboard on HP-PARISC 172 machines. Say Y here to build support for it into your kernel. 173 The alternative is to use your primary serial port as a console. 174 175endmenu 176 177