Root/
1 | |
2 | s3fb - fbdev driver for S3 Trio/Virge chips |
3 | =========================================== |
4 | |
5 | |
6 | Supported Hardware |
7 | ================== |
8 | |
9 | S3 Trio32 |
10 | S3 Trio64 (and variants V+, UV+, V2/DX, V2/GX) |
11 | S3 Virge (and variants VX, DX, GX and GX2+) |
12 | S3 Plato/PX (completely untested) |
13 | S3 Aurora64V+ (completely untested) |
14 | |
15 | - only PCI bus supported |
16 | - only BIOS initialized VGA devices supported |
17 | - probably not working on big endian |
18 | |
19 | I tested s3fb on Trio64 (plain, V+ and V2/DX) and Virge (plain, VX, DX), |
20 | all on i386. |
21 | |
22 | |
23 | Supported Features |
24 | ================== |
25 | |
26 | * 4 bpp pseudocolor modes (with 18bit palette, two variants) |
27 | * 8 bpp pseudocolor mode (with 18bit palette) |
28 | * 16 bpp truecolor modes (RGB 555 and RGB 565) |
29 | * 24 bpp truecolor mode (RGB 888) on (only on Virge VX) |
30 | * 32 bpp truecolor mode (RGB 888) on (not on Virge VX) |
31 | * text mode (activated by bpp = 0) |
32 | * interlaced mode variant (not available in text mode) |
33 | * doublescan mode variant (not available in text mode) |
34 | * panning in both directions |
35 | * suspend/resume support |
36 | * DPMS support |
37 | |
38 | Text mode is supported even in higher resolutions, but there is limitation to |
39 | lower pixclocks (maximum usually between 50-60 MHz, depending on specific |
40 | hardware, i get best results from plain S3 Trio32 card - about 75 MHz). This |
41 | limitation is not enforced by driver. Text mode supports 8bit wide fonts only |
42 | (hardware limitation) and 16bit tall fonts (driver limitation). Text mode |
43 | support is broken on S3 Trio64 V2/DX. |
44 | |
45 | There are two 4 bpp modes. First mode (selected if nonstd == 0) is mode with |
46 | packed pixels, high nibble first. Second mode (selected if nonstd == 1) is mode |
47 | with interleaved planes (1 byte interleave), MSB first. Both modes support |
48 | 8bit wide fonts only (driver limitation). |
49 | |
50 | Suspend/resume works on systems that initialize video card during resume and |
51 | if device is active (for example used by fbcon). |
52 | |
53 | |
54 | Missing Features |
55 | ================ |
56 | (alias TODO list) |
57 | |
58 | * secondary (not initialized by BIOS) device support |
59 | * big endian support |
60 | * Zorro bus support |
61 | * MMIO support |
62 | * 24 bpp mode support on more cards |
63 | * support for fontwidths != 8 in 4 bpp modes |
64 | * support for fontheight != 16 in text mode |
65 | * composite and external sync (is anyone able to test this?) |
66 | * hardware cursor |
67 | * video overlay support |
68 | * vsync synchronization |
69 | * feature connector support |
70 | * acceleration support (8514-like 2D, Virge 3D, busmaster transfers) |
71 | * better values for some magic registers (performance issues) |
72 | |
73 | |
74 | Known bugs |
75 | ========== |
76 | |
77 | * cursor disable in text mode doesn't work |
78 | * text mode broken on S3 Trio64 V2/DX |
79 | |
80 | |
81 | -- |
82 | Ondrej Zajicek <santiago@crfreenet.org> |
83 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9