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