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# SPDX-License-Identifier: GPL-2.0-only
#
# Video configuration
#
menu "Console display driver support"
config VGA_CONSOLE
bool "VGA text console" if EXPERT || !X86
depends on !4xx && !PPC_8xx && !SPARC && !M68K && !PARISC && !SUPERH && \
(!ARM || ARCH_FOOTBRIDGE || ARCH_INTEGRATOR || ARCH_NETWINDER) && \
!ARM64 && !ARC && !MICROBLAZE && !OPENRISC && !NDS32 && !S390
default y
help
Saying Y here will allow you to use Linux in text mode through a
display that complies with the generic VGA standard. Virtually
everyone wants that.
The program SVGATextMode can be used to utilize SVGA video cards to
their full potential in text mode. Download it from
<ftp://ibiblio.org/pub/Linux/utils/console/>.
Say Y.
config VGACON_SOFT_SCROLLBACK
bool "Enable Scrollback Buffer in System RAM"
depends on VGA_CONSOLE
default n
help
The scrollback buffer of the standard VGA console is located in
the VGA RAM. The size of this RAM is fixed and is quite small.
If you require a larger scrollback buffer, this can be placed in
System RAM which is dynamically allocated during initialization.
Placing the scrollback buffer in System RAM will slightly slow
down the console.
If you want this feature, say 'Y' here and enter the amount of
RAM to allocate for this buffer. If unsure, say 'N'.
config VGACON_SOFT_SCROLLBACK_SIZE
int "Scrollback Buffer Size (in KB)"
depends on VGACON_SOFT_SCROLLBACK
range 1 1024
default "64"
help
Enter the amount of System RAM to allocate for scrollback
buffers of VGA consoles. Each 64KB will give you approximately
16 80x25 screenfuls of scrollback buffer.
config VGACON_SOFT_SCROLLBACK_PERSISTENT_ENABLE_BY_DEFAULT
bool "Persistent Scrollback History for each console by default"
depends on VGACON_SOFT_SCROLLBACK
default n
help
Say Y here if the scrollback history should persist by default when
switching between consoles. Otherwise, the scrollback history will be
flushed each time the console is switched. This feature can also be
enabled using the boot command line parameter
'vgacon.scrollback_persistent=1'.
This feature might break your tool of choice to flush the scrollback
buffer, e.g. clear(1) will work fine but Debian's clear_console(1)
will be broken, which might cause security issues.
You can use the escape sequence \e[3J instead if this feature is
activated.
Note that a buffer of VGACON_SOFT_SCROLLBACK_SIZE is taken for each
created tty device.
So if you use a RAM-constrained system, say N here.
config MDA_CONSOLE
depends on !M68K && !PARISC && ISA
tristate "MDA text console (dual-headed)"
---help---
Say Y here if you have an old MDA or monochrome Hercules graphics
adapter in your system acting as a second head ( = video card). You
will then be able to use two monitors with your Linux system. Do not
say Y here if your MDA card is the primary card in your system; the
normal VGA driver will handle it.
To compile this driver as a module, choose M here: the
module will be called mdacon.
If unsure, say N.
config SGI_NEWPORT_CONSOLE
tristate "SGI Newport Console support"
depends on SGI_IP22 && HAS_IOMEM
select FONT_SUPPORT
help
Say Y here if you want the console on the Newport aka XL graphics
card of your Indy. Most people say Y here.
config DUMMY_CONSOLE
bool
depends on VGA_CONSOLE!=y || SGI_NEWPORT_CONSOLE!=y
default y
config DUMMY_CONSOLE_COLUMNS
int "Initial number of console screen columns"
depends on DUMMY_CONSOLE && !ARM
default 160 if PARISC
default 80
help
On PA-RISC, the default value is 160, which should fit a 1280x1024
monitor.
Select 80 if you use a 640x480 resolution by default.
config DUMMY_CONSOLE_ROWS
int "Initial number of console screen rows"
depends on DUMMY_CONSOLE && !ARM
default 64 if PARISC
default 25
help
On PA-RISC, the default value is 64, which should fit a 1280x1024
monitor.
Select 25 if you use a 640x480 resolution by default.
config FRAMEBUFFER_CONSOLE
bool "Framebuffer Console support"
depends on FB && !UML
select VT_HW_CONSOLE_BINDING
select CRC32
select FONT_SUPPORT
help
Low-level framebuffer-based console driver.
config FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
bool "Map the console to the primary display device"
depends on FRAMEBUFFER_CONSOLE
default n
---help---
If this option is selected, the framebuffer console will
automatically select the primary display device (if the architecture
supports this feature). Otherwise, the framebuffer console will
always select the first framebuffer driver that is loaded. The latter
is the default behavior.
You can always override the automatic selection of the primary device
by using the fbcon=map: boot option.
If unsure, select n.
config FRAMEBUFFER_CONSOLE_ROTATION
bool "Framebuffer Console Rotation"
depends on FRAMEBUFFER_CONSOLE
help
Enable display rotation for the framebuffer console. This is done
in software and may be significantly slower than a normally oriented
display. Note that the rotation is done at the console level only
such that other users of the framebuffer will remain normally
oriented.
config FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
bool "Framebuffer Console Deferred Takeover"
depends on FB=y && FRAMEBUFFER_CONSOLE && DUMMY_CONSOLE
help
If enabled this defers the framebuffer console taking over the
console from the dummy console until the first text is displayed on
the console. This is useful in combination with the "quiet" kernel
commandline option to keep the framebuffer contents initially put up
by the firmware in place, rather then replacing the contents with a
black screen as soon as fbcon loads.
config STI_CONSOLE
bool "STI text console"
depends on PARISC && HAS_IOMEM
select FONT_SUPPORT
default y
help
The STI console is the builtin display/keyboard on HP-PARISC
machines. Say Y here to build support for it into your kernel.
The alternative is to use your primary serial port as a console.
endmenu
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