Root/
1 | |
2 | arkfb - fbdev driver for ARK Logic chips |
3 | ======================================== |
4 | |
5 | |
6 | Supported Hardware |
7 | ================== |
8 | |
9 | ARK 2000PV chip |
10 | ICS 5342 ramdac |
11 | |
12 | - only BIOS initialized VGA devices supported |
13 | - probably not working on big endian |
14 | |
15 | |
16 | Supported Features |
17 | ================== |
18 | |
19 | * 4 bpp pseudocolor modes (with 18bit palette, two variants) |
20 | * 8 bpp pseudocolor mode (with 18bit palette) |
21 | * 16 bpp truecolor modes (RGB 555 and RGB 565) |
22 | * 24 bpp truecolor mode (RGB 888) |
23 | * 32 bpp truecolor mode (RGB 888) |
24 | * text mode (activated by bpp = 0) |
25 | * doublescan mode variant (not available in text mode) |
26 | * panning in both directions |
27 | * suspend/resume support |
28 | |
29 | Text mode is supported even in higher resolutions, but there is limitation to |
30 | lower pixclocks (i got maximum about 70 MHz, it is dependent on specific |
31 | hardware). This limitation is not enforced by driver. Text mode supports 8bit |
32 | wide fonts only (hardware limitation) and 16bit tall fonts (driver |
33 | limitation). Unfortunately character attributes (like color) in text mode are |
34 | broken for unknown reason, so its usefulness is limited. |
35 | |
36 | There are two 4 bpp modes. First mode (selected if nonstd == 0) is mode with |
37 | packed pixels, high nibble first. Second mode (selected if nonstd == 1) is mode |
38 | with interleaved planes (1 byte interleave), MSB first. Both modes support |
39 | 8bit wide fonts only (driver limitation). |
40 | |
41 | Suspend/resume works on systems that initialize video card during resume and |
42 | if device is active (for example used by fbcon). |
43 | |
44 | |
45 | Missing Features |
46 | ================ |
47 | (alias TODO list) |
48 | |
49 | * secondary (not initialized by BIOS) device support |
50 | * big endian support |
51 | * DPMS support |
52 | * MMIO support |
53 | * interlaced mode variant |
54 | * support for fontwidths != 8 in 4 bpp modes |
55 | * support for fontheight != 16 in text mode |
56 | * hardware cursor |
57 | * vsync synchronization |
58 | * feature connector support |
59 | * acceleration support (8514-like 2D) |
60 | |
61 | |
62 | Known bugs |
63 | ========== |
64 | |
65 | * character attributes (and cursor) in text mode are broken |
66 | |
67 | -- |
68 | Ondrej Zajicek <santiago@crfreenet.org> |
69 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9