diff options
Diffstat (limited to 'README')
| -rw-r--r-- | README | 20 |
1 files changed, 20 insertions, 0 deletions
@@ -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. |