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fbdev: powerpc: driver for Freescale 8610 and 5121 DIU

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The following features are supported:
plane 0 works as a regular frame buffer, can be accessed by /dev/fb0
plane 1 has two AOIs (area of interest), can be accessed by /dev/fb1 and /dev/fb2
plane 2 has two AOIs, can be accessed by /dev/fb3 and /dev/fb4
Special ioctls support AOIs

All /dev/fb* can be used as regular frame buffer devices, except hardware
change can only be made through /dev/fb0.  Changing pixel clock has no effect
on other fbs.

Limitation of usage of AOIs:
AOIs on the same plane can not be horizonally overlapped
AOIs have horizonal order, i.e. AOI0 should be always on top of AOI1
AOIs can not beyond phisical display area. Application should check AOI geometry
before changing physical resolution on /dev/fb0

required command line parameters to preallocate memory for frame buffer diufb.

optional command line parameters to set modes and monitor
video=fslfb:[resolution][,bpp][,monitor]
Syntax:

Resolution
xres x yres-bpp@refresh_rate, the -bpp and @refresh_rate are optional
eg, 1024x768, 1280x1024, 1280x1024-32, 1280x1024@60, 1280x1024-32@60, 1280x480-32@60

Bpp
bpp=32, bpp=24, or bpp=16

Monitor
monitor=0, monitor=1, monitor=2
0 is DVI
1 is Single link LVDS
2 is Double link LVDS

Note: switching monitor is a board feather, not DIU feather. MPC8610HPCD has three
monitor ports to swtich to. MPC5121ADS doesn't have additional monitor port. So switching
monirot port for MPC5121ADS has no effect.

If compiled as a module, it takes pamameters mode, bpp, monitor with the same syntax above.

Signed-off-by: York Sun <[email protected]>
Signed-off-by: Timur Tabi <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: "Antonino A. Daplas" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
York Sun 2008-04-28 02:15:34 -07:00 • committed by Linus Torvalds
commit 9b53a9e28a
6 changed files with 2000 additions and 0 deletions
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33
Documentation/powerpc/booting-without-of.txt
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@ -2836,6 +2836,39 @@ platforms are moved over to use the flattened-device-tree model.
big-endian;
};
r) Freescale Display Interface Unit
The Freescale DIU is a LCD controller, with proper hardware, it can also
drive DVI monitors.
Required properties:
- compatible : should be "fsl-diu".
- reg : should contain at least address and length of the DIU register
set.
- Interrupts : one DIU interrupt should be describe here.
Example (MPC8610HPCD)
display@2c000 {
compatible = "fsl,diu";
reg = <0x2c000 100>;
interrupts = <72 2>;
interrupt-parent = <&mpic>;
};
s) Freescale on board FPGA
This is the memory-mapped registers for on board FPGA.
Required properities:
- compatible : should be "fsl,fpga-pixis".
- reg : should contain the address and the lenght of the FPPGA register
set.
Example (MPC8610HPCD)
board-control@e8000000 {
compatible = "fsl,fpga-pixis";
reg = <0xe8000000 32>;
};
VII - Marvell Discovery mv64[345]6x System Controller chips
===========================================================