User manual

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3.4.3 Display Subsystem Driver
Figure 16: Working Principle of Display Subsystem
The hardware of the display subsystem includes a graphics channel, two
video channels and two overlay management units; one of the units is
responsible for the digital interface, another for the analogue interface.
The digital interface manages the LCD output, while the analogue one
manages the TV output.
The main function of a display driver is to provide interfaces for the upper
application layer and manage the hardware components of the display
subsystem.
Reference
linux-2.6.32-sbc8140/drivers/video/omap2/
linux-2.6.32-sbc8140/drivers/video/omap2/omapfb/omapfb-main.c
linux-2.6.32-sbc8140/drivers/video/omap2/displays/panel-omap3-sbc8140.c