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#
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# Video configuration
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#
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menu "Console display driver support"
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config VGA_CONSOLE
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bool "VGA text console" if EMBEDDED || !X86
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depends on !ARCH_ACORN && !ARCH_EBSA110 && !4xx && !8xx && !SPARC32 && !SPARC64 && !M68K && !PARISC && !ARCH_VERSATILE
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default y
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help
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Saying Y here will allow you to use Linux in text mode through a
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display that complies with the generic VGA standard. Virtually
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everyone wants that.
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The program SVGATextMode can be used to utilize SVGA video cards to
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their full potential in text mode. Download it from
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<ftp://ibiblio.org/pub/Linux/utils/console/>.
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Say Y.
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# if [ "$CONFIG_PCI" = "y" -a "$CONFIG_VGA_CONSOLE" = "y" ]; then
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# bool ' Allow VGA on any bus?' CONFIG_VGA_HOSE
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# if [ "$CONFIG_VGA_HOSE" = "y" ]; then
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# define_bool CONFIG_DUMMY_CONSOLE y
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# fi
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# fi
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config VIDEO_SELECT
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bool "Video mode selection support"
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depends on X86 && VGA_CONSOLE
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---help---
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This enables support for text mode selection on kernel startup. If
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you want to take advantage of some high-resolution text mode your
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card's BIOS offers, but the traditional Linux utilities like
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SVGATextMode don't, you can say Y here and set the mode using the
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"vga=" option from your boot loader (lilo or loadlin) or set
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"vga=ask" which brings up a video mode menu on kernel startup. (Try
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"man bootparam" or see the documentation of your boot loader about
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how to pass options to the kernel.)
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Read the file <file:Documentation/svga.txt> for more information
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about the Video mode selection support. If unsure, say N.
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config MDA_CONSOLE
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depends on !M68K && !PARISC && ISA
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tristate "MDA text console (dual-headed) (EXPERIMENTAL)"
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---help---
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Say Y here if you have an old MDA or monochrome Hercules graphics
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adapter in your system acting as a second head ( = video card). You
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will then be able to use two monitors with your Linux system. Do not
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say Y here if your MDA card is the primary card in your system; the
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normal VGA driver will handle it.
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To compile this driver as a module, choose M here: the
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module will be called mdacon.
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If unsure, say N.
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config SGI_NEWPORT_CONSOLE
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tristate "SGI Newport Console support"
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depends on SGI_IP22
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help
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Say Y here if you want the console on the Newport aka XL graphics
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card of your Indy. Most people say Y here.
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# bool 'IODC console' CONFIG_IODC_CONSOLE
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config PROM_CONSOLE
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bool "PROM console"
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depends on SPARC32 || SPARC64
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help
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Say Y to build a console driver for Sun machines that uses the
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terminal emulation built into their console PROMS.
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config DUMMY_CONSOLE
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bool
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depends on PROM_CONSOLE!=y || VGA_CONSOLE!=y || SGI_NEWPORT_CONSOLE!=y
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default y
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config DUMMY_CONSOLE_COLUMNS
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int "Initial number of console screen columns"
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depends on PARISC && DUMMY_CONSOLE
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default "160"
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help
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The default value is 160, which should fit a 1280x1024 monitor.
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Select 80 if you use a 640x480 resolution by default.
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config DUMMY_CONSOLE_ROWS
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int "Initial number of console screen rows"
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depends on PARISC && DUMMY_CONSOLE
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default "64"
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help
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The default value is 64, which should fit a 1280x1024 monitor.
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Select 25 if you use a 640x480 resolution by default.
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config FRAMEBUFFER_CONSOLE
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tristate "Framebuffer Console support"
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depends on FB
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select CRC32
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help
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Low-level framebuffer-based console driver.
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[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
19 years ago
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config FRAMEBUFFER_CONSOLE_ROTATION
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bool "Framebuffer Console Rotation"
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depends on FRAMEBUFFER_CONSOLE
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help
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Enable display rotation for the framebuffer console. This is done
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in software and may be significantly slower than a normally oriented
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display. Note that the rotation is done at the console level only
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such that other users of the framebuffer will remain normally
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oriented.
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config STI_CONSOLE
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tristate "STI text console"
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depends on PARISC
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default y
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help
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The STI console is the builtin display/keyboard on HP-PARISC
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machines. Say Y here to build support for it into your kernel.
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The alternative is to use your primary serial port as a console.
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config FONTS
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bool "Select compiled-in fonts"
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depends on FRAMEBUFFER_CONSOLE || STI_CONSOLE
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help
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Say Y here if you would like to use fonts other than the default
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your frame buffer console usually use.
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Note that the answer to this question won't directly affect the
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kernel: saying N will just cause the configurator to skip all
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the questions about foreign fonts.
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If unsure, say N (the default choices are safe).
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config FONT_8x8
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bool "VGA 8x8 font" if FONTS
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depends on FRAMEBUFFER_CONSOLE || STI_CONSOLE
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default y if !SPARC32 && !SPARC64 && !FONTS
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help
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This is the "high resolution" font for the VGA frame buffer (the one
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provided by the text console 80x50 (and higher) modes).
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Note that this is a poor quality font. The VGA 8x16 font is quite a
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lot more readable.
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Given the resolution provided by the frame buffer device, answer N
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here is safe.
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config FONT_8x16
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bool "VGA 8x16 font" if FONTS
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depends on FRAMEBUFFER_CONSOLE || SGI_NEWPORT_CONSOLE=y || STI_CONSOLE || USB_SISUSBVGA_CON
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default y if !SPARC32 && !SPARC64 && !FONTS
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help
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This is the "high resolution" font for the VGA frame buffer (the one
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provided by the VGA text console 80x25 mode.
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If unsure, say Y.
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config FONT_6x11
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bool "Mac console 6x11 font (not supported by all drivers)" if FONTS
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depends on FRAMEBUFFER_CONSOLE || STI_CONSOLE
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default y if !SPARC32 && !SPARC64 && !FONTS && MAC
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help
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Small console font with Macintosh-style high-half glyphs. Some Mac
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framebuffer drivers don't support this one at all.
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config FONT_7x14
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bool "console 7x14 font (not supported by all drivers)" if FONTS
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depends on FRAMEBUFFER_CONSOLE
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help
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Console font with characters just a bit smaller than the default.
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If the standard 8x16 font is a little too big for you, say Y.
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Otherwise, say N.
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config FONT_PEARL_8x8
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bool "Pearl (old m68k) console 8x8 font" if FONTS
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depends on FRAMEBUFFER_CONSOLE
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default y if !SPARC32 && !SPARC64 && !FONTS && AMIGA
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help
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Small console font with PC-style control-character and high-half
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glyphs.
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config FONT_ACORN_8x8
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bool "Acorn console 8x8 font" if FONTS
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depends on FRAMEBUFFER_CONSOLE
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default y if !SPARC32 && !SPARC64 && !FONTS && ARM && ARCH_ACORN
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help
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Small console font with PC-style control characters and high-half
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glyphs.
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config FONT_MINI_4x6
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bool "Mini 4x6 font"
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depends on !SPARC32 && !SPARC64 && FONTS
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config FONT_SUN8x16
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bool "Sparc console 8x16 font"
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depends on FRAMEBUFFER_CONSOLE && (!SPARC32 && !SPARC64 && FONTS || SPARC32 || SPARC64)
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help
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This is the high resolution console font for Sun machines. Say Y.
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config FONT_SUN12x22
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bool "Sparc console 12x22 font (not supported by all drivers)"
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depends on FRAMEBUFFER_CONSOLE && (!SPARC32 && !SPARC64 && FONTS || SPARC32 || SPARC64)
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help
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This is the high resolution console font for Sun machines with very
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big letters (like the letters used in the SPARC PROM). If the
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standard font is unreadable for you, say Y, otherwise say N.
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config FONT_10x18
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bool "console 10x18 font (not supported by all drivers)" if FONTS
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depends on FRAMEBUFFER_CONSOLE
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help
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This is a high resolution console font for machines with very
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big letters. It fits between the sun 12x22 and the normal 8x16 font.
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If other fonts are too big or too small for you, say Y, otherwise say N.
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config FONT_RL
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bool "console Roman Large 8x16 font" if FONTS
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depends on FRAMEBUFFER_CONSOLE
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help
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This is the visually-appealing "RL" console font that is
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included with the kbd package.
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endmenu
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