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Documentation/fb: corrections for fbcon.txt

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Fix grammar, spacing, indentation, and Kconfig menu locations
in fbcon.txt.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Antonino Daplas <adaplas@pol.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
This commit is contained in:
Randy Dunlap 2018-08-10 17:23:02 +02:00 committed by Bartlomiej Zolnierkiewicz
parent df37e225f2
commit f39684524b
1 changed files with 15 additions and 14 deletions
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29
Documentation/fb/fbcon.txt
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@ -18,9 +18,10 @@ made available by the underlying graphics card are also possible.
A. Configuration
The framebuffer console can be enabled by using your favorite kernel
configuration tool. It is under Device Drivers->Graphics Support->Support for
framebuffer devices->Framebuffer Console Support. Select 'y' to compile
support statically, or 'm' for module support. The module will be fbcon.
configuration tool. It is under Device Drivers->Graphics Support->Frame
buffer Devices->Console display driver support->Framebuffer Console Support.
Select 'y' to compile support statically or 'm' for module support. The
module will be fbcon.
In order for fbcon to activate, at least one framebuffer driver is
required, so choose from any of the numerous drivers available. For x86
@ -29,10 +30,10 @@ always be available. However, using a chipset-specific driver will give you
more speed and features, such as the ability to change the video mode
dynamically.
To display the penguin logo, choose any logo available in Logo
Configuration->Boot up logo.
To display the penguin logo, choose any logo available in Graphics
support->Bootup logo.
Also, you will need to select at least one compiled-in fonts, but if
Also, you will need to select at least one compiled-in font, but if
you don't do anything, the kernel configuration tool will select one for you,
usually an 8x16 font.
@ -135,16 +136,16 @@ C. Boot options
The angle can be changed anytime afterwards by 'echoing' the same
numbers to any one of the 2 attributes found in
/sys/class/graphics/fbcon
/sys/class/graphics/fbcon:
rotate - rotate the display of the active console
rotate_all - rotate the display of all consoles
Console rotation will only become available if Console Rotation
Support is compiled in your kernel.
Console rotation will only become available if Framebuffer Console
Rotation support is compiled in your kernel.
NOTE: This is purely console rotation. Any other applications that
use the framebuffer will remain at their 'normal'orientation.
use the framebuffer will remain at their 'normal' orientation.
Actually, the underlying fb driver is totally ignorant of console
rotation.
@ -164,7 +165,7 @@ C. Boot options
C. Attaching, Detaching and Unloading
Before going on how to attach, detach and unload the framebuffer console, an
Before going on to how to attach, detach and unload the framebuffer console, an
illustration of the dependencies may help.
The console layer, as with most subsystems, needs a driver that interfaces with
@ -182,7 +183,7 @@ because fbcon is an intermediate layer between the console and the drivers:
console ---> fbcon ---> fbdev drivers ---> hardware
The fbdev drivers cannot be unloaded if it's bound to fbcon, and fbcon cannot
The fbdev drivers cannot be unloaded if bound to fbcon, and fbcon cannot
be unloaded if it's bound to the console layer.
So to unload the fbdev drivers, one must first unbind fbcon from the console,
@ -232,7 +233,7 @@ restored properly. The following is one of the several methods that you can do:
echo 0 > /sys/class/vtconsole/vtcon1/bind
6. That's it, you're back to VGA mode. And if you compiled fbcon as a module,
you can unload it by 'rmmod fbcon'
you can unload it by 'rmmod fbcon'.
7. To reattach fbcon:
@ -290,7 +291,7 @@ Samples:
========
Here are 2 sample bash scripts that you can use to bind or unbind the
framebuffer console driver if you are in an X86 box:
framebuffer console driver if you are on an X86 box:
---------------------------------------------------------------------------
#!/bin/bash