[U-Boot] [PATCH v2 0/4] common/lcd_console: introduce display/framebuffer rotation

[Hannes Petermaier <oe5hpm@oevsv.at>]

Sometimes, for example if the display is mounted in portrait mode or even if it
mounted landscape but rotated by 180 degree, we need to rotate our content of
the display respectively the framebuffer, so that user can read the messages who
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.
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
0 degrees rotation.

Patch 1-3 make preparations to the code.
Patch 4 implements the new feature

Changes in v2:
- cleanup README text for feature
- don't make code cleanups (lcd_console.c) within this patch
- remove (unnary) comment in lcd_console.h
- update year to 2015 within copyright in lcd_console.c
- move rotation related code into separate file lcd_console_rotation.c
- rework rotation code
- change meaning of vl_rot to match fbcon=rotate:<n> from the linux-kernel

Hannes Petermaier (4):
  common/lcd_console: cleanup lcd_drawchars/lcd_putc_xy
  common/lcd_console: ask only one-time for bg/fg-color per call
  common/lcd_console: move single static variables into common (static)
    structure
  common/lcd_console: introduce display/framebuffer rotation

 README                        |   22 +++++
 common/Makefile               |    1 +
 common/lcd.c                  |   15 ++-
 common/lcd_console.c          |  208 +++++++++++++++++++++------------------
 common/lcd_console_rotation.c |  216 +++++++++++++++++++++++++++++++++++++++++
 include/lcd.h                 |    1 +
 include/lcd_console.h         |   18 +++-
 7 files changed, 371 insertions(+), 110 deletions(-)
 create mode 100644 common/lcd_console_rotation.c

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1.7.9.5