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 default y 97 98config DUMMY_CONSOLE_COLUMNS 99 int "Initial number of console screen columns" 100 depends on DUMMY_CONSOLE && !ARM 101 default 160 if PARISC 102 default 80 103 help 104 On PA-RISC, the default value is 160, which should fit a 1280x1024 105 monitor. 106 Select 80 if you use a 640x480 resolution by default. 107 108config DUMMY_CONSOLE_ROWS 109 int "Initial number of console screen rows" 110 depends on DUMMY_CONSOLE && !ARM 111 default 64 if PARISC 112 default 25 113 help 114 On PA-RISC, the default value is 64, which should fit a 1280x1024 115 monitor. 116 Select 25 if you use a 640x480 resolution by default. 117 118config FRAMEBUFFER_CONSOLE 119 bool "Framebuffer Console support" 120 depends on FB && !UML 121 select VT_HW_CONSOLE_BINDING 122 select CRC32 123 select FONT_SUPPORT 124 help 125 Low-level framebuffer-based console driver. 126 127config FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 128 bool "Map the console to the primary display device" 129 depends on FRAMEBUFFER_CONSOLE 130 default n 131 help 132 If this option is selected, the framebuffer console will 133 automatically select the primary display device (if the architecture 134 supports this feature). Otherwise, the framebuffer console will 135 always select the first framebuffer driver that is loaded. The latter 136 is the default behavior. 137 138 You can always override the automatic selection of the primary device 139 by using the fbcon=map: boot option. 140 141 If unsure, select n. 142 143config FRAMEBUFFER_CONSOLE_ROTATION 144 bool "Framebuffer Console Rotation" 145 depends on FRAMEBUFFER_CONSOLE 146 help 147 Enable display rotation for the framebuffer console. This is done 148 in software and may be significantly slower than a normally oriented 149 display. Note that the rotation is done at the console level only 150 such that other users of the framebuffer will remain normally 151 oriented. 152 153config FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 154 bool "Framebuffer Console Deferred Takeover" 155 depends on FB=y && FRAMEBUFFER_CONSOLE && DUMMY_CONSOLE 156 help 157 If enabled this defers the framebuffer console taking over the 158 console from the dummy console until the first text is displayed on 159 the console. This is useful in combination with the "quiet" kernel 160 commandline option to keep the framebuffer contents initially put up 161 by the firmware in place, rather then replacing the contents with a 162 black screen as soon as fbcon loads. 163 164config STI_CONSOLE 165 bool "STI text console" 166 depends on PARISC && HAS_IOMEM 167 select FONT_SUPPORT 168 default y 169 help 170 The STI console is the builtin display/keyboard on HP-PARISC 171 machines. Say Y here to build support for it into your kernel. 172 The alternative is to use your primary serial port as a console. 173 174endmenu 175 176