1*4882a593Smuzhiyun=========================================== 2*4882a593Smuzhiyuns3fb - fbdev driver for S3 Trio/Virge chips 3*4882a593Smuzhiyun=========================================== 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun 6*4882a593SmuzhiyunSupported Hardware 7*4882a593Smuzhiyun================== 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun S3 Trio32 10*4882a593Smuzhiyun S3 Trio64 (and variants V+, UV+, V2/DX, V2/GX) 11*4882a593Smuzhiyun S3 Virge (and variants VX, DX, GX and GX2+) 12*4882a593Smuzhiyun S3 Plato/PX (completely untested) 13*4882a593Smuzhiyun S3 Aurora64V+ (completely untested) 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun - only PCI bus supported 16*4882a593Smuzhiyun - only BIOS initialized VGA devices supported 17*4882a593Smuzhiyun - probably not working on big endian 18*4882a593Smuzhiyun 19*4882a593SmuzhiyunI tested s3fb on Trio64 (plain, V+ and V2/DX) and Virge (plain, VX, DX), 20*4882a593Smuzhiyunall on i386. 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun 23*4882a593SmuzhiyunSupported Features 24*4882a593Smuzhiyun================== 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun * 4 bpp pseudocolor modes (with 18bit palette, two variants) 27*4882a593Smuzhiyun * 8 bpp pseudocolor mode (with 18bit palette) 28*4882a593Smuzhiyun * 16 bpp truecolor modes (RGB 555 and RGB 565) 29*4882a593Smuzhiyun * 24 bpp truecolor mode (RGB 888) on (only on Virge VX) 30*4882a593Smuzhiyun * 32 bpp truecolor mode (RGB 888) on (not on Virge VX) 31*4882a593Smuzhiyun * text mode (activated by bpp = 0) 32*4882a593Smuzhiyun * interlaced mode variant (not available in text mode) 33*4882a593Smuzhiyun * doublescan mode variant (not available in text mode) 34*4882a593Smuzhiyun * panning in both directions 35*4882a593Smuzhiyun * suspend/resume support 36*4882a593Smuzhiyun * DPMS support 37*4882a593Smuzhiyun 38*4882a593SmuzhiyunText mode is supported even in higher resolutions, but there is limitation to 39*4882a593Smuzhiyunlower pixclocks (maximum usually between 50-60 MHz, depending on specific 40*4882a593Smuzhiyunhardware, i get best results from plain S3 Trio32 card - about 75 MHz). This 41*4882a593Smuzhiyunlimitation is not enforced by driver. Text mode supports 8bit wide fonts only 42*4882a593Smuzhiyun(hardware limitation) and 16bit tall fonts (driver limitation). Text mode 43*4882a593Smuzhiyunsupport is broken on S3 Trio64 V2/DX. 44*4882a593Smuzhiyun 45*4882a593SmuzhiyunThere are two 4 bpp modes. First mode (selected if nonstd == 0) is mode with 46*4882a593Smuzhiyunpacked pixels, high nibble first. Second mode (selected if nonstd == 1) is mode 47*4882a593Smuzhiyunwith interleaved planes (1 byte interleave), MSB first. Both modes support 48*4882a593Smuzhiyun8bit wide fonts only (driver limitation). 49*4882a593Smuzhiyun 50*4882a593SmuzhiyunSuspend/resume works on systems that initialize video card during resume and 51*4882a593Smuzhiyunif device is active (for example used by fbcon). 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun 54*4882a593SmuzhiyunMissing Features 55*4882a593Smuzhiyun================ 56*4882a593Smuzhiyun(alias TODO list) 57*4882a593Smuzhiyun 58*4882a593Smuzhiyun * secondary (not initialized by BIOS) device support 59*4882a593Smuzhiyun * big endian support 60*4882a593Smuzhiyun * Zorro bus support 61*4882a593Smuzhiyun * MMIO support 62*4882a593Smuzhiyun * 24 bpp mode support on more cards 63*4882a593Smuzhiyun * support for fontwidths != 8 in 4 bpp modes 64*4882a593Smuzhiyun * support for fontheight != 16 in text mode 65*4882a593Smuzhiyun * composite and external sync (is anyone able to test this?) 66*4882a593Smuzhiyun * hardware cursor 67*4882a593Smuzhiyun * video overlay support 68*4882a593Smuzhiyun * vsync synchronization 69*4882a593Smuzhiyun * feature connector support 70*4882a593Smuzhiyun * acceleration support (8514-like 2D, Virge 3D, busmaster transfers) 71*4882a593Smuzhiyun * better values for some magic registers (performance issues) 72*4882a593Smuzhiyun 73*4882a593Smuzhiyun 74*4882a593SmuzhiyunKnown bugs 75*4882a593Smuzhiyun========== 76*4882a593Smuzhiyun 77*4882a593Smuzhiyun * cursor disable in text mode doesn't work 78*4882a593Smuzhiyun * text mode broken on S3 Trio64 V2/DX 79*4882a593Smuzhiyun 80*4882a593Smuzhiyun 81*4882a593Smuzhiyun-- 82*4882a593SmuzhiyunOndrej Zajicek <santiago@crfreenet.org> 83