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diff --git a/src/ativalid.c b/src/ativalid.c
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-/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/ati/ativalid.c,v 1.16 2003/04/23 21:51:31 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.
- */
-int
-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;
-}
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