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authorHannes Petermaier <hannes.petermaier@br-automation.com>2015-03-27 08:01:38 +0100
committerAnatolij Gustschin <agust@denx.de>2015-04-18 17:40:37 +0200
commit604c7d4a5a3cf70949f6e6094bf0d52ee3b4804d (patch)
tree997da4b8fc4db4258ec2fe83cf397301fb26e572 /README
parent7471142cdf75c562f2ac8f07c021e0ba80bde6bd (diff)
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common/lcd_console: introduce display/framebuffer rotation
Sometimes, for example if the display is mounted in portrait mode or even if it is mounted landscape but rotated by 180 degrees, we need to rotate our content of the display respectively the framebuffer, so that user can read the messages which are printed out. For this we introduce the feature called "CONFIG_LCD_ROTATION", this may be defined in the board-configuration if needed. After this the lcd_console will be initialized with a given rotation from "vl_rot" out of "vidinfo_t" which is provided by the board specific code. If CONFIG_LCD_ROTATION is not defined, the console will be initialized with 0 degrees rotation. Signed-off-by: Hannes Petermaier <hannes.petermaier@br-automation.com> Signed-off-by: Hannes Petermaier <oe5hpm@oevsv.at> Acked-by: Nikita Kiryanov <nikita@compulab.co.il> [agust: fixed 'struct vidinfo' has no member named 'vl_rot' errors] Signed-off-by: Anatolij Gustschin <agust@denx.de>
Diffstat (limited to 'README')
-rw-r--r--README20
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diff --git a/README b/README
index 9b748ccc34..b662eb9836 100644
--- a/README
+++ b/README
@@ -1947,6 +1947,26 @@ CBFS (Coreboot Filesystem) support
the console jump but can help speed up operation when scrolling
is slow.
+ CONFIG_LCD_ROTATION
+
+ Sometimes, for example if the display is mounted in portrait
+ mode or even if it's mounted landscape but rotated by 180degree,
+ we need to rotate our content of the display relative to the
+ framebuffer, so that user can read the messages which are
+ printed out.
+ Once CONFIG_LCD_ROTATION is defined, the lcd_console will be
+ initialized with a given rotation from "vl_rot" out of
+ "vidinfo_t" which is provided by the board specific code.
+ The value for vl_rot is coded as following (matching to
+ fbcon=rotate:<n> linux-kernel commandline):
+ 0 = no rotation respectively 0 degree
+ 1 = 90 degree rotation
+ 2 = 180 degree rotation
+ 3 = 270 degree rotation
+
+ If CONFIG_LCD_ROTATION is not defined, the console will be
+ initialized with 0degree rotation.
+
CONFIG_LCD_BMP_RLE8
Support drawing of RLE8-compressed bitmaps on the LCD.