/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/ati/ativalid.c,v 1.17 2003/10/30 17:36:58 tsi Exp $ */ /* * Copyright 1997 through 2003 by Marc Aurele La France (TSI @ UQV), tsi@xfree86.org * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that copyright * notice and this permission notice appear in supporting documentation, and * that the name of Marc Aurele La France not be used in advertising or * publicity pertaining to distribution of the software without specific, * written prior permission. Marc Aurele La France makes no representations * about the suitability of this software for any purpose. It is provided * "as-is" without express or implied warranty. * * MARC AURELE LA FRANCE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO * EVENT SHALL MARC AURELE LA FRANCE BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ #include "atiadapter.h" #include "atichip.h" #include "aticrtc.h" #include "atistruct.h" #include "ativalid.h" #include "xf86.h" /* * ATIValidMode -- * * This checks for hardware-related limits on mode timings. */ ModeStatus ATIValidMode ( int iScreen, DisplayModePtr pMode, Bool Verbose, int flags ) { ScrnInfoPtr pScreenInfo = xf86Screens[iScreen]; ATIPtr pATI = ATIPTR(pScreenInfo); Bool InterlacedSeen; int HBlankWidth, HAdjust, VScan, VInterlace; #ifndef AVOID_CPIO int VDisplay, VTotal; #endif /* AVOID_CPIO */ if (flags & MODECHECK_FINAL) { /* * This is the final check before the common layer accepts a mode. * pScreenInfo->displayWidth is set to the proposed virtual pitch * should the mode be accepted. The only check needed here is for * 18800's and 28800's, which don't support interlaced modes if the * pitch is over half the chipset's maximum pitch. */ if (pATI->MaximumInterlacedPitch) { /* * Ensure no interlaced modes have a scanline pitch larger than the * limit. */ if (pMode->Flags & V_INTERLACE) InterlacedSeen = TRUE; else InterlacedSeen = pATI->InterlacedSeen; if (InterlacedSeen && (pScreenInfo->displayWidth > pATI->MaximumInterlacedPitch)) return MODE_INTERLACE_WIDTH; pATI->InterlacedSeen = InterlacedSeen; } return MODE_OK; } /* * The following is done for every mode in the monitor section that * survives the common layer's basic checks. */ if (pMode->VScan <= 1) VScan = 1; else VScan = pMode->VScan; if (pMode->Flags & V_DBLSCAN) VScan <<= 1; if (pATI->OptionPanelDisplay && (pATI->LCDPanelID >= 0)) { if ((pMode->CrtcHDisplay > pATI->LCDHorizontal) || (pMode->CrtcVDisplay > pATI->LCDVertical)) return MODE_PANEL; if (!pATI->OptionLCDSync || (pMode->type & M_T_BUILTIN)) { if ((pMode->HDisplay > pATI->LCDHorizontal) || (pMode->VDisplay > pATI->LCDVertical)) return MODE_PANEL; return MODE_OK; } /* * Adjust effective timings for monitor checks. Here the modeline * clock is ignored. Horizontal timings are scaled by the stretch * ratio used for the displayed area. The vertical porch is scaled by * the native resolution's aspect ratio. This seems rather arbitrary, * and it is, but it does make all applicable VESA modes sync on a * panel after stretching. This has the unfortunate, but necessary, * side-effect of changing the mode's horizontal sync and vertical * refresh rates. With some exceptions, this tends to increase the * mode's horizontal sync rate, and decrease its vertical refresh rate. */ pMode->SynthClock = pATI->LCDClock; pMode->CrtcHTotal = pMode->CrtcHBlankEnd = ATIDivide(pMode->CrtcHTotal * pATI->LCDHorizontal, pMode->CrtcHDisplay, -3, 1) << 3; pMode->CrtcHSyncEnd = ATIDivide(pMode->CrtcHSyncEnd * pATI->LCDHorizontal, pMode->CrtcHDisplay, -3, 1) << 3; pMode->CrtcHSyncStart = ATIDivide(pMode->CrtcHSyncStart * pATI->LCDHorizontal, pMode->CrtcHDisplay, -3, -1) << 3; pMode->CrtcHDisplay = pMode->CrtcHBlankStart = pATI->LCDHorizontal; pMode->CrtcVTotal = pMode->CrtcVBlankEnd = ATIDivide((pMode->CrtcVTotal - pMode->CrtcVDisplay) * pATI->LCDVertical, pATI->LCDHorizontal, 0, 1) + pATI->LCDVertical; pMode->CrtcVSyncEnd = ATIDivide((pMode->CrtcVSyncEnd - pMode->CrtcVDisplay) * pATI->LCDVertical, pATI->LCDHorizontal, 0, 1) + pATI->LCDVertical; pMode->CrtcVSyncStart = ATIDivide((pMode->CrtcVSyncStart - pMode->CrtcVDisplay) * pATI->LCDVertical, pATI->LCDHorizontal, 0, -1) + pATI->LCDVertical; pMode->CrtcVDisplay = pMode->CrtcVBlankStart = pATI->LCDVertical; /* * The CRTC only stretches the mode's displayed area, not its porches. * Reverse-engineer the mode's timings back into the user specified * values so that the stretched mode is produced when the CRTC is * eventually programmed. The reverse-engineered mode is then checked * against CRTC limits below. */ pMode->Clock = pATI->LCDClock; HAdjust = pATI->LCDHorizontal - pMode->HDisplay; # define ATIReverseHorizontal(_x) \ (pMode->_x - HAdjust) pMode->HSyncStart = ATIReverseHorizontal(CrtcHSyncStart); pMode->HSyncEnd = ATIReverseHorizontal(CrtcHSyncEnd); pMode->HTotal = ATIReverseHorizontal(CrtcHTotal); VInterlace = GetBits(pMode->Flags, V_INTERLACE) + 1; # define ATIReverseVertical(_y) \ ((((pMode->_y - pATI->LCDVertical) * VInterlace) / VScan) + \ pMode->VDisplay) pMode->VSyncStart = ATIReverseVertical(CrtcVSyncStart); pMode->VSyncEnd = ATIReverseVertical(CrtcVSyncEnd); pMode->VTotal = ATIReverseVertical(CrtcVTotal); # undef ATIReverseHorizontal # undef ATIReverseVertical } HBlankWidth = (pMode->HTotal >> 3) - (pMode->HDisplay >> 3); if (!HBlankWidth) return MODE_HBLANK_NARROW; switch (pATI->NewHW.crtc) { #ifndef AVOID_CPIO case ATI_CRTC_VGA: /* Prevent overscans */ if (HBlankWidth > 63) return MODE_HBLANK_WIDE; if (pMode->HDisplay > 2048) return MODE_BAD_HVALUE; if (VScan > 64) return MODE_BAD_VSCAN; VDisplay = pMode->VDisplay * VScan; VTotal = pMode->VTotal * VScan; if ((pMode->Flags & V_INTERLACE) && (pATI->Chip < ATI_CHIP_264CT)) { VDisplay >>= 1; VTotal >>= 1; } if ((VDisplay > 2048) || (VTotal > 2050)) return MODE_BAD_VVALUE; if (pATI->Adapter != ATI_ADAPTER_VGA) break; if ((VDisplay > 1024) || (VTotal > 1025)) return MODE_BAD_VVALUE; break; #endif /* AVOID_CPIO */ case ATI_CRTC_MACH64: if (VScan > 2) return MODE_NO_VSCAN; break; default: break; } return MODE_OK; }