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-rw-r--r--xorg-server/hw/xfree86/common/xf86Mode.c4260
1 files changed, 2130 insertions, 2130 deletions
diff --git a/xorg-server/hw/xfree86/common/xf86Mode.c b/xorg-server/hw/xfree86/common/xf86Mode.c
index df0884794..d202d4079 100644
--- a/xorg-server/hw/xfree86/common/xf86Mode.c
+++ b/xorg-server/hw/xfree86/common/xf86Mode.c
@@ -1,2130 +1,2130 @@
-/*
- * Copyright (c) 1997-2003 by The XFree86 Project, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- * Except as contained in this notice, the name of the copyright holder(s)
- * and author(s) shall not be used in advertising or otherwise to promote
- * the sale, use or other dealings in this Software without prior written
- * authorization from the copyright holder(s) and author(s).
- */
-
-/*
- * LCM() and scanLineWidth() are:
- *
- * Copyright 1997 through 2004 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.
- *
- * Copyright 1990,91,92,93 by Thomas Roell, Germany.
- * Copyright 1991,92,93 by SGCS (Snitily Graphics Consulting Services), USA.
- *
- * 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 Thomas Roell nor
- * SGCS be used in advertising or publicity pertaining to distribution
- * of the software without specific, written prior permission.
- * Thomas Roell nor SGCS makes no representations about the suitability
- * of this software for any purpose. It is provided "as is" without
- * express or implied warranty.
- *
- * THOMAS ROELL AND SGCS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
- * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS, IN NO EVENT SHALL THOMAS ROELL OR SGCS 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.
- */
-
-/*
- * Authors: Dirk Hohndel <hohndel@XFree86.Org>
- * David Dawes <dawes@XFree86.Org>
- * Marc La France <tsi@XFree86.Org>
- * ... and others
- *
- * This file includes helper functions for mode related things.
- */
-
-#ifdef HAVE_XORG_CONFIG_H
-#include <xorg-config.h>
-#endif
-
-#include <X11/X.h>
-#include "xf86Modes.h"
-#include "os.h"
-#include "servermd.h"
-#include "globals.h"
-#include "xf86.h"
-#include "xf86Priv.h"
-#include "edid.h"
-
-static void
-printModeRejectMessage(int index, DisplayModePtr p, int status)
-{
- char *type;
-
- if (p->type & M_T_BUILTIN)
- type = "built-in ";
- else if (p->type & M_T_DEFAULT)
- type = "default ";
- else if (p->type & M_T_DRIVER)
- type = "driver ";
- else
- type = "";
-
- xf86DrvMsg(index, X_INFO, "Not using %smode \"%s\" (%s)\n", type, p->name,
- xf86ModeStatusToString(status));
-}
-
-/*
- * xf86GetNearestClock --
- * Find closest clock to given frequency (in kHz). This assumes the
- * number of clocks is greater than zero.
- */
-int
-xf86GetNearestClock(ScrnInfoPtr scrp, int freq, Bool allowDiv2,
- int DivFactor, int MulFactor, int *divider)
-{
- int nearestClock = 0, nearestDiv = 1;
- int minimumGap = abs(freq - scrp->clock[0]);
- int i, j, k, gap;
-
- if (allowDiv2)
- k = 2;
- else
- k = 1;
-
- /* Must set this here in case the best match is scrp->clock[0] */
- if (divider != NULL)
- *divider = 0;
-
- for (i = 0; i < scrp->numClocks; i++) {
- for (j = 1; j <= k; j++) {
- gap = abs((freq * j) - ((scrp->clock[i] * DivFactor) / MulFactor));
- if ((gap < minimumGap) ||
- ((gap == minimumGap) && (j < nearestDiv))) {
- minimumGap = gap;
- nearestClock = i;
- nearestDiv = j;
- if (divider != NULL)
- *divider = (j - 1) * V_CLKDIV2;
- }
- }
- }
- return nearestClock;
-}
-
-/*
- * xf86ModeStatusToString
- *
- * Convert a ModeStatus value to a printable message
- */
-
-const char *
-xf86ModeStatusToString(ModeStatus status)
-{
- switch (status) {
- case MODE_OK:
- return "Mode OK";
- case MODE_HSYNC:
- return "hsync out of range";
- case MODE_VSYNC:
- return "vrefresh out of range";
- case MODE_H_ILLEGAL:
- return "illegal horizontal timings";
- case MODE_V_ILLEGAL:
- return "illegal vertical timings";
- case MODE_BAD_WIDTH:
- return "width requires unsupported line pitch";
- case MODE_NOMODE:
- return "no mode of this name";
- case MODE_NO_INTERLACE:
- return "interlace mode not supported";
- case MODE_NO_DBLESCAN:
- return "doublescan mode not supported";
- case MODE_NO_VSCAN:
- return "multiscan mode not supported";
- case MODE_MEM:
- return "insufficient memory for mode";
- case MODE_VIRTUAL_X:
- return "width too large for virtual size";
- case MODE_VIRTUAL_Y:
- return "height too large for virtual size";
- case MODE_MEM_VIRT:
- return "insufficient memory given virtual size";
- case MODE_NOCLOCK:
- return "no clock available for mode";
- case MODE_CLOCK_HIGH:
- return "mode clock too high";
- case MODE_CLOCK_LOW:
- return "mode clock too low";
- case MODE_CLOCK_RANGE:
- return "bad mode clock/interlace/doublescan";
- case MODE_BAD_HVALUE:
- return "horizontal timing out of range";
- case MODE_BAD_VVALUE:
- return "vertical timing out of range";
- case MODE_BAD_VSCAN:
- return "VScan value out of range";
- case MODE_HSYNC_NARROW:
- return "horizontal sync too narrow";
- case MODE_HSYNC_WIDE:
- return "horizontal sync too wide";
- case MODE_HBLANK_NARROW:
- return "horizontal blanking too narrow";
- case MODE_HBLANK_WIDE:
- return "horizontal blanking too wide";
- case MODE_VSYNC_NARROW:
- return "vertical sync too narrow";
- case MODE_VSYNC_WIDE:
- return "vertical sync too wide";
- case MODE_VBLANK_NARROW:
- return "vertical blanking too narrow";
- case MODE_VBLANK_WIDE:
- return "vertical blanking too wide";
- case MODE_PANEL:
- return "exceeds panel dimensions";
- case MODE_INTERLACE_WIDTH:
- return "width too large for interlaced mode";
- case MODE_ONE_WIDTH:
- return "all modes must have the same width";
- case MODE_ONE_HEIGHT:
- return "all modes must have the same height";
- case MODE_ONE_SIZE:
- return "all modes must have the same resolution";
- case MODE_NO_REDUCED:
- return "monitor doesn't support reduced blanking";
- case MODE_BANDWIDTH:
- return "mode requires too much memory bandwidth";
- case MODE_BAD:
- return "unknown reason";
- case MODE_ERROR:
- return "internal error";
- default:
- return "unknown";
- }
-}
-
-/*
- * xf86ShowClockRanges() -- Print the clock ranges allowed
- * and the clock values scaled by ClockMulFactor and ClockDivFactor
- */
-void
-xf86ShowClockRanges(ScrnInfoPtr scrp, ClockRangePtr clockRanges)
-{
- ClockRangePtr cp;
- int MulFactor = 1;
- int DivFactor = 1;
- int i, j;
- int scaledClock;
-
- for (cp = clockRanges; cp != NULL; cp = cp->next) {
- DivFactor = max(1, cp->ClockDivFactor);
- MulFactor = max(1, cp->ClockMulFactor);
- if (scrp->progClock) {
- if (cp->minClock) {
- if (cp->maxClock) {
- xf86DrvMsg(scrp->scrnIndex, X_INFO,
- "Clock range: %6.2f to %6.2f MHz\n",
- (double)cp->minClock / 1000.0,
- (double)cp->maxClock / 1000.0);
- } else {
- xf86DrvMsg(scrp->scrnIndex, X_INFO,
- "Minimum clock: %6.2f MHz\n",
- (double)cp->minClock / 1000.0);
- }
- } else {
- if (cp->maxClock) {
- xf86DrvMsg(scrp->scrnIndex, X_INFO,
- "Maximum clock: %6.2f MHz\n",
- (double)cp->maxClock / 1000.0);
- }
- }
- } else if (DivFactor > 1 || MulFactor > 1) {
- j = 0;
- for (i = 0; i < scrp->numClocks; i++) {
- scaledClock = (scrp->clock[i] * DivFactor) / MulFactor;
- if (scaledClock >= cp->minClock && scaledClock <= cp->maxClock) {
- if ((j % 8) == 0) {
- if (j > 0)
- xf86ErrorF("\n");
- xf86DrvMsg(scrp->scrnIndex, X_INFO, "scaled clocks:");
- }
- xf86ErrorF(" %6.2f", (double)scaledClock / 1000.0);
- j++;
- }
- }
- xf86ErrorF("\n");
- }
- }
-}
-
-static Bool
-modeInClockRange(ClockRangePtr cp, DisplayModePtr p)
-{
- return ((p->Clock >= cp->minClock) &&
- (p->Clock <= cp->maxClock) &&
- (cp->interlaceAllowed || !(p->Flags & V_INTERLACE)) &&
- (cp->doubleScanAllowed ||
- ((p->VScan <= 1) && !(p->Flags & V_DBLSCAN))));
-}
-
-/*
- * xf86FindClockRangeForMode() [... like the name says ...]
- */
-static ClockRangePtr
-xf86FindClockRangeForMode(ClockRangePtr clockRanges, DisplayModePtr p)
-{
- ClockRangePtr cp;
-
- for (cp = clockRanges; ; cp = cp->next)
- if (!cp || modeInClockRange(cp, p))
- return cp;
-}
-
-
-/*
- * xf86HandleBuiltinMode() - handles built-in modes
- */
-static ModeStatus
-xf86HandleBuiltinMode(ScrnInfoPtr scrp,
- DisplayModePtr p,
- DisplayModePtr modep,
- ClockRangePtr clockRanges,
- Bool allowDiv2)
-{
- ClockRangePtr cp;
- int extraFlags = 0;
- int MulFactor = 1;
- int DivFactor = 1;
- int clockIndex;
-
- /* Reject previously rejected modes */
- if (p->status != MODE_OK)
- return p->status;
-
- /* Reject previously considered modes */
- if (p->prev)
- return MODE_NOMODE;
-
- if ((p->type & M_T_CLOCK_C) == M_T_CLOCK_C) {
- /* Check clock is in range */
- cp = xf86FindClockRangeForMode(clockRanges, p);
- if (cp == NULL){
- modep->type = p->type;
- p->status = MODE_CLOCK_RANGE;
- return MODE_CLOCK_RANGE;
- }
- DivFactor = cp->ClockDivFactor;
- MulFactor = cp->ClockMulFactor;
- if (!scrp->progClock) {
- clockIndex = xf86GetNearestClock(scrp, p->Clock, allowDiv2,
- cp->ClockDivFactor,
- cp->ClockMulFactor, &extraFlags);
- modep->Clock = (scrp->clock[clockIndex] * DivFactor)
- / MulFactor;
- modep->ClockIndex = clockIndex;
- modep->SynthClock = scrp->clock[clockIndex];
- if (extraFlags & V_CLKDIV2) {
- modep->Clock /= 2;
- modep->SynthClock /= 2;
- }
- } else {
- modep->Clock = p->Clock;
- modep->ClockIndex = -1;
- modep->SynthClock = (modep->Clock * MulFactor)
- / DivFactor;
- }
- modep->PrivFlags = cp->PrivFlags;
- } else {
- if(!scrp->progClock) {
- modep->Clock = p->Clock;
- modep->ClockIndex = p->ClockIndex;
- modep->SynthClock = p->SynthClock;
- } else {
- modep->Clock = p->Clock;
- modep->ClockIndex = -1;
- modep->SynthClock = p->SynthClock;
- }
- modep->PrivFlags = p->PrivFlags;
- }
- modep->type = p->type;
- modep->HDisplay = p->HDisplay;
- modep->HSyncStart = p->HSyncStart;
- modep->HSyncEnd = p->HSyncEnd;
- modep->HTotal = p->HTotal;
- modep->HSkew = p->HSkew;
- modep->VDisplay = p->VDisplay;
- modep->VSyncStart = p->VSyncStart;
- modep->VSyncEnd = p->VSyncEnd;
- modep->VTotal = p->VTotal;
- modep->VScan = p->VScan;
- modep->Flags = p->Flags | extraFlags;
- modep->CrtcHDisplay = p->CrtcHDisplay;
- modep->CrtcHBlankStart = p->CrtcHBlankStart;
- modep->CrtcHSyncStart = p->CrtcHSyncStart;
- modep->CrtcHSyncEnd = p->CrtcHSyncEnd;
- modep->CrtcHBlankEnd = p->CrtcHBlankEnd;
- modep->CrtcHTotal = p->CrtcHTotal;
- modep->CrtcHSkew = p->CrtcHSkew;
- modep->CrtcVDisplay = p->CrtcVDisplay;
- modep->CrtcVBlankStart = p->CrtcVBlankStart;
- modep->CrtcVSyncStart = p->CrtcVSyncStart;
- modep->CrtcVSyncEnd = p->CrtcVSyncEnd;
- modep->CrtcVBlankEnd = p->CrtcVBlankEnd;
- modep->CrtcVTotal = p->CrtcVTotal;
- modep->CrtcHAdjusted = p->CrtcHAdjusted;
- modep->CrtcVAdjusted = p->CrtcVAdjusted;
- modep->HSync = p->HSync;
- modep->VRefresh = p->VRefresh;
- modep->Private = p->Private;
- modep->PrivSize = p->PrivSize;
-
- p->prev = modep;
-
- return MODE_OK;
-}
-
-/*
- * xf86LookupMode
- *
- * This function returns a mode from the given list which matches the
- * given name. When multiple modes with the same name are available,
- * the method of picking the matching mode is determined by the
- * strategy selected.
- *
- * This function takes the following parameters:
- * scrp ScrnInfoPtr
- * modep pointer to the returned mode, which must have the name
- * field filled in.
- * clockRanges a list of clock ranges. This is optional when all the
- * modes are built-in modes.
- * strategy how to decide which mode to use from multiple modes with
- * the same name
- *
- * In addition, the following fields from the ScrnInfoRec are used:
- * modePool the list of monitor modes compatible with the driver
- * clocks a list of discrete clocks
- * numClocks number of discrete clocks
- * progClock clock is programmable
- *
- * If a mode was found, its values are filled in to the area pointed to
- * by modep, If a mode was not found the return value indicates the
- * reason.
- */
-
-ModeStatus
-xf86LookupMode(ScrnInfoPtr scrp, DisplayModePtr modep,
- ClockRangePtr clockRanges, LookupModeFlags strategy)
-{
- DisplayModePtr p, bestMode = NULL;
- ClockRangePtr cp;
- int i, k, gap, minimumGap = CLOCK_TOLERANCE + 1;
- double refresh, bestRefresh = 0.0;
- Bool found = FALSE;
- int extraFlags = 0;
- int clockIndex = -1;
- int MulFactor = 1;
- int DivFactor = 1;
- int ModePrivFlags = 0;
- ModeStatus status = MODE_NOMODE;
- Bool allowDiv2 = (strategy & LOOKUP_CLKDIV2) != 0;
- int n;
- const int types[] = {
- M_T_BUILTIN | M_T_PREFERRED,
- M_T_BUILTIN,
- M_T_USERDEF | M_T_PREFERRED,
- M_T_USERDEF,
- M_T_DRIVER | M_T_PREFERRED,
- M_T_DRIVER,
- 0
- };
- const int ntypes = sizeof(types) / sizeof(int);
-
- strategy &= ~(LOOKUP_CLKDIV2 | LOOKUP_OPTIONAL_TOLERANCES);
-
- /* Some sanity checking */
- if (scrp == NULL || scrp->modePool == NULL ||
- (!scrp->progClock && scrp->numClocks == 0)) {
- ErrorF("xf86LookupMode: called with invalid scrnInfoRec\n");
- return MODE_ERROR;
- }
- if (modep == NULL || modep->name == NULL) {
- ErrorF("xf86LookupMode: called with invalid modep\n");
- return MODE_ERROR;
- }
- for (cp = clockRanges; cp != NULL; cp = cp->next) {
- /* DivFactor and MulFactor must be > 0 */
- cp->ClockDivFactor = max(1, cp->ClockDivFactor);
- cp->ClockMulFactor = max(1, cp->ClockMulFactor);
- }
-
- /* Scan the mode pool for matching names */
- for (n = 0; n < ntypes; n++) {
- int type = types[n];
- for (p = scrp->modePool; p != NULL; p = p->next) {
-
- /* scan through the modes in the sort order above */
- if ((p->type & type) != type)
- continue;
-
- if (strcmp(p->name, modep->name) == 0) {
-
- /* Skip over previously rejected modes */
- if (p->status != MODE_OK) {
- if (!found)
- status = p->status;
- continue;
- }
-
- /* Skip over previously considered modes */
- if (p->prev)
- continue;
-
- if (p->type & M_T_BUILTIN) {
- return xf86HandleBuiltinMode(scrp, p,modep, clockRanges,
- allowDiv2);
- }
-
- /* Check clock is in range */
- cp = xf86FindClockRangeForMode(clockRanges, p);
- if (cp == NULL) {
- /*
- * XXX Could do more here to provide a more detailed
- * reason for not finding a mode.
- */
- p->status = MODE_CLOCK_RANGE;
- if (!found)
- status = MODE_CLOCK_RANGE;
- continue;
- }
-
- /*
- * If programmable clock and strategy is not
- * LOOKUP_BEST_REFRESH, the required mode has been found,
- * otherwise record the refresh and continue looking.
- */
- if (scrp->progClock) {
- found = TRUE;
- if (strategy != LOOKUP_BEST_REFRESH) {
- bestMode = p;
- DivFactor = cp->ClockDivFactor;
- MulFactor = cp->ClockMulFactor;
- ModePrivFlags = cp->PrivFlags;
- break;
- }
- refresh = xf86ModeVRefresh(p);
- if (p->Flags & V_INTERLACE)
- refresh /= INTERLACE_REFRESH_WEIGHT;
- if (refresh > bestRefresh) {
- bestMode = p;
- DivFactor = cp->ClockDivFactor;
- MulFactor = cp->ClockMulFactor;
- ModePrivFlags = cp->PrivFlags;
- bestRefresh = refresh;
- }
- continue;
- }
-
- /*
- * Clock is in range, so if it is not a programmable clock, find
- * a matching clock.
- */
-
- i = xf86GetNearestClock(scrp, p->Clock, allowDiv2,
- cp->ClockDivFactor, cp->ClockMulFactor, &k);
- /*
- * If the clock is too far from the requested clock, this
- * mode is no good.
- */
- if (k & V_CLKDIV2)
- gap = abs((p->Clock * 2) -
- ((scrp->clock[i] * cp->ClockDivFactor) /
- cp->ClockMulFactor));
- else
- gap = abs(p->Clock -
- ((scrp->clock[i] * cp->ClockDivFactor) /
- cp->ClockMulFactor));
- if (gap > minimumGap) {
- p->status = MODE_NOCLOCK;
- if (!found)
- status = MODE_NOCLOCK;
- continue;
- }
- found = TRUE;
-
- if (strategy == LOOKUP_BEST_REFRESH) {
- refresh = xf86ModeVRefresh(p);
- if (p->Flags & V_INTERLACE)
- refresh /= INTERLACE_REFRESH_WEIGHT;
- if (refresh > bestRefresh) {
- bestMode = p;
- DivFactor = cp->ClockDivFactor;
- MulFactor = cp->ClockMulFactor;
- ModePrivFlags = cp->PrivFlags;
- extraFlags = k;
- clockIndex = i;
- bestRefresh = refresh;
- }
- continue;
- }
- if (strategy == LOOKUP_CLOSEST_CLOCK) {
- if (gap < minimumGap) {
- bestMode = p;
- DivFactor = cp->ClockDivFactor;
- MulFactor = cp->ClockMulFactor;
- ModePrivFlags = cp->PrivFlags;
- extraFlags = k;
- clockIndex = i;
- minimumGap = gap;
- }
- continue;
- }
- /*
- * If strategy is neither LOOKUP_BEST_REFRESH or
- * LOOKUP_CLOSEST_CLOCK the required mode has been found.
- */
- bestMode = p;
- DivFactor = cp->ClockDivFactor;
- MulFactor = cp->ClockMulFactor;
- ModePrivFlags = cp->PrivFlags;
- extraFlags = k;
- clockIndex = i;
- break;
- }
- }
- if (found) break;
- }
- if (!found || bestMode == NULL)
- return status;
-
- /* Fill in the mode parameters */
- if (scrp->progClock) {
- modep->Clock = bestMode->Clock;
- modep->ClockIndex = -1;
- modep->SynthClock = (modep->Clock * MulFactor) / DivFactor;
- } else {
- modep->Clock = (scrp->clock[clockIndex] * DivFactor) /
- MulFactor;
- modep->ClockIndex = clockIndex;
- modep->SynthClock = scrp->clock[clockIndex];
- if (extraFlags & V_CLKDIV2) {
- modep->Clock /= 2;
- modep->SynthClock /= 2;
- }
- }
- modep->type = bestMode->type;
- modep->PrivFlags = ModePrivFlags;
- modep->HDisplay = bestMode->HDisplay;
- modep->HSyncStart = bestMode->HSyncStart;
- modep->HSyncEnd = bestMode->HSyncEnd;
- modep->HTotal = bestMode->HTotal;
- modep->HSkew = bestMode->HSkew;
- modep->VDisplay = bestMode->VDisplay;
- modep->VSyncStart = bestMode->VSyncStart;
- modep->VSyncEnd = bestMode->VSyncEnd;
- modep->VTotal = bestMode->VTotal;
- modep->VScan = bestMode->VScan;
- modep->Flags = bestMode->Flags | extraFlags;
- modep->CrtcHDisplay = bestMode->CrtcHDisplay;
- modep->CrtcHBlankStart = bestMode->CrtcHBlankStart;
- modep->CrtcHSyncStart = bestMode->CrtcHSyncStart;
- modep->CrtcHSyncEnd = bestMode->CrtcHSyncEnd;
- modep->CrtcHBlankEnd = bestMode->CrtcHBlankEnd;
- modep->CrtcHTotal = bestMode->CrtcHTotal;
- modep->CrtcHSkew = bestMode->CrtcHSkew;
- modep->CrtcVDisplay = bestMode->CrtcVDisplay;
- modep->CrtcVBlankStart = bestMode->CrtcVBlankStart;
- modep->CrtcVSyncStart = bestMode->CrtcVSyncStart;
- modep->CrtcVSyncEnd = bestMode->CrtcVSyncEnd;
- modep->CrtcVBlankEnd = bestMode->CrtcVBlankEnd;
- modep->CrtcVTotal = bestMode->CrtcVTotal;
- modep->CrtcHAdjusted = bestMode->CrtcHAdjusted;
- modep->CrtcVAdjusted = bestMode->CrtcVAdjusted;
- modep->HSync = bestMode->HSync;
- modep->VRefresh = bestMode->VRefresh;
- modep->Private = bestMode->Private;
- modep->PrivSize = bestMode->PrivSize;
-
- bestMode->prev = modep;
-
- return MODE_OK;
-}
-
-/*
- * xf86CheckModeForMonitor
- *
- * This function takes a mode and monitor description, and determines
- * if the mode is valid for the monitor.
- */
-ModeStatus
-xf86CheckModeForMonitor(DisplayModePtr mode, MonPtr monitor)
-{
- int i;
-
- /* Sanity checks */
- if (mode == NULL || monitor == NULL) {
- ErrorF("xf86CheckModeForMonitor: called with invalid parameters\n");
- return MODE_ERROR;
- }
-
- DebugF("xf86CheckModeForMonitor(%p %s, %p %s)\n",
- mode, mode->name, monitor, monitor->id);
-
- /* Some basic mode validity checks */
- if (0 >= mode->HDisplay || mode->HDisplay > mode->HSyncStart ||
- mode->HSyncStart >= mode->HSyncEnd || mode->HSyncEnd >= mode->HTotal)
- return MODE_H_ILLEGAL;
-
- if (0 >= mode->VDisplay || mode->VDisplay > mode->VSyncStart ||
- mode->VSyncStart >= mode->VSyncEnd || mode->VSyncEnd >= mode->VTotal)
- return MODE_V_ILLEGAL;
-
- if (monitor->nHsync > 0) {
- /* Check hsync against the allowed ranges */
- float hsync = xf86ModeHSync(mode);
- for (i = 0; i < monitor->nHsync; i++)
- if ((hsync > monitor->hsync[i].lo * (1.0 - SYNC_TOLERANCE)) &&
- (hsync < monitor->hsync[i].hi * (1.0 + SYNC_TOLERANCE)))
- break;
-
- /* Now see whether we ran out of sync ranges without finding a match */
- if (i == monitor->nHsync)
- return MODE_HSYNC;
- }
-
- if (monitor->nVrefresh > 0) {
- /* Check vrefresh against the allowed ranges */
- float vrefrsh = xf86ModeVRefresh(mode);
- for (i = 0; i < monitor->nVrefresh; i++)
- if ((vrefrsh > monitor->vrefresh[i].lo * (1.0 - SYNC_TOLERANCE)) &&
- (vrefrsh < monitor->vrefresh[i].hi * (1.0 + SYNC_TOLERANCE)))
- break;
-
- /* Now see whether we ran out of refresh ranges without finding a match */
- if (i == monitor->nVrefresh)
- return MODE_VSYNC;
- }
-
- /* Force interlaced modes to have an odd VTotal */
- if (mode->Flags & V_INTERLACE)
- mode->CrtcVTotal = mode->VTotal |= 1;
-
- /*
- * This code stops cvt -r modes, and only cvt -r modes, from hitting 15y+
- * old CRTs which might, when there is a lot of solar flare activity and
- * when the celestial bodies are unfavourably aligned, implode trying to
- * sync to it. It's called "Protecting the user from doing anything stupid".
- * -- libv
- */
-
- if (xf86ModeIsReduced(mode)) {
- if (!monitor->reducedblanking && !(mode->type & M_T_DRIVER))
- return MODE_NO_REDUCED;
- }
-
- if ((monitor->maxPixClock) && (mode->Clock > monitor->maxPixClock))
- return MODE_CLOCK_HIGH;
-
- return MODE_OK;
-}
-
-/*
- * xf86CheckModeSize
- *
- * An internal routine to check if a mode fits in video memory. This tries to
- * avoid overflows that would otherwise occur when video memory size is greater
- * than 256MB.
- */
-static Bool
-xf86CheckModeSize(ScrnInfoPtr scrp, int w, int x, int y)
-{
- int bpp = scrp->fbFormat.bitsPerPixel,
- pad = scrp->fbFormat.scanlinePad;
- int lineWidth, lastWidth;
-
- if (scrp->depth == 4)
- pad *= 4; /* 4 planes */
-
- /* Sanity check */
- if ((w < 0) || (x < 0) || (y <= 0))
- return FALSE;
-
- lineWidth = (((w * bpp) + pad - 1) / pad) * pad;
- lastWidth = x * bpp;
-
- /*
- * At this point, we need to compare
- *
- * (lineWidth * (y - 1)) + lastWidth
- *
- * against
- *
- * scrp->videoRam * (1024 * 8)
- *
- * These are bit quantities. To avoid overflows, do the comparison in
- * terms of BITMAP_SCANLINE_PAD units. This assumes BITMAP_SCANLINE_PAD
- * is a power of 2. We currently use 32, which limits us to a video
- * memory size of 8GB.
- */
-
- lineWidth = (lineWidth + (BITMAP_SCANLINE_PAD - 1)) / BITMAP_SCANLINE_PAD;
- lastWidth = (lastWidth + (BITMAP_SCANLINE_PAD - 1)) / BITMAP_SCANLINE_PAD;
-
- if ((lineWidth * (y - 1) + lastWidth) >
- (scrp->videoRam * ((1024 * 8) / BITMAP_SCANLINE_PAD)))
- return FALSE;
-
- return TRUE;
-}
-
-/*
- * xf86InitialCheckModeForDriver
- *
- * This function checks if a mode satisfies a driver's initial requirements:
- * - mode size fits within the available pixel area (memory)
- * - width lies within the range of supported line pitches
- * - mode size fits within virtual size (if fixed)
- * - horizontal timings are in range
- *
- * This function takes the following parameters:
- * scrp ScrnInfoPtr
- * mode mode to check
- * maxPitch (optional) maximum line pitch
- * virtualX (optional) virtual width requested
- * virtualY (optional) virtual height requested
- *
- * In addition, the following fields from the ScrnInfoRec are used:
- * monitor pointer to structure for monitor section
- * fbFormat pixel format for the framebuffer
- * videoRam video memory size (in kB)
- * maxHValue maximum horizontal timing value
- * maxVValue maximum vertical timing value
- */
-
-ModeStatus
-xf86InitialCheckModeForDriver(ScrnInfoPtr scrp, DisplayModePtr mode,
- ClockRangePtr clockRanges,
- LookupModeFlags strategy,
- int maxPitch, int virtualX, int virtualY)
-{
- ClockRangePtr cp;
- ModeStatus status;
- Bool allowDiv2 = (strategy & LOOKUP_CLKDIV2) != 0;
- int i, needDiv2;
-
- /* Sanity checks */
- if (!scrp || !mode || !clockRanges) {
- ErrorF("xf86InitialCheckModeForDriver: "
- "called with invalid parameters\n");
- return MODE_ERROR;
- }
-
- DebugF("xf86InitialCheckModeForDriver(%p, %p %s, %p, 0x%x, %d, %d, %d)\n",
- scrp, mode, mode->name , clockRanges, strategy, maxPitch, virtualX, virtualY);
-
- /* Some basic mode validity checks */
- if (0 >= mode->HDisplay || mode->HDisplay > mode->HSyncStart ||
- mode->HSyncStart >= mode->HSyncEnd || mode->HSyncEnd >= mode->HTotal)
- return MODE_H_ILLEGAL;
-
- if (0 >= mode->VDisplay || mode->VDisplay > mode->VSyncStart ||
- mode->VSyncStart >= mode->VSyncEnd || mode->VSyncEnd >= mode->VTotal)
- return MODE_V_ILLEGAL;
-
- if (!xf86CheckModeSize(scrp, mode->HDisplay, mode->HDisplay,
- mode->VDisplay))
- return MODE_MEM;
-
- if (maxPitch > 0 && mode->HDisplay > maxPitch)
- return MODE_BAD_WIDTH;
-
- if (virtualX > 0 && mode->HDisplay > virtualX)
- return MODE_VIRTUAL_X;
-
- if (virtualY > 0 && mode->VDisplay > virtualY)
- return MODE_VIRTUAL_Y;
-
- if (scrp->maxHValue > 0 && mode->HTotal > scrp->maxHValue)
- return MODE_BAD_HVALUE;
-
- if (scrp->maxVValue > 0 && mode->VTotal > scrp->maxVValue)
- return MODE_BAD_VVALUE;
-
- /*
- * The use of the DisplayModeRec's Crtc* and SynthClock elements below is
- * provisional, in that they are later reused by the driver at mode-set
- * time. Here, they are temporarily enlisted to contain the mode timings
- * as seen by the CRT or panel (rather than the CRTC). The driver's
- * ValidMode() is allowed to modify these so it can deal with such things
- * as mode stretching and/or centering. The driver should >NOT< modify the
- * user-supplied values as these are reported back when mode validation is
- * said and done.
- */
- /*
- * NOTE: We (ab)use the mode->Crtc* values here to store timing
- * information for the calculation of Hsync and Vrefresh. Before
- * these values are calculated the driver is given the opportunity
- * to either set these HSync and VRefresh itself or modify the timing
- * values.
- * The difference to the final calculation is small but imortand:
- * here we pass the flag INTERLACE_HALVE_V regardless if the driver
- * sets it or not. This way our calculation of VRefresh has the same
- * effect as if we do if (flags & V_INTERLACE) refresh *= 2.0
- * This dual use of the mode->Crtc* values will certainly create
- * confusion and is bad software design. However since it's part of
- * the driver API it's hard to change.
- */
-
- if (scrp->ValidMode) {
-
- xf86SetModeCrtc(mode, INTERLACE_HALVE_V);
-
- cp = xf86FindClockRangeForMode(clockRanges, mode);
- if (!cp)
- return MODE_CLOCK_RANGE;
-
- if (cp->ClockMulFactor < 1)
- cp->ClockMulFactor = 1;
- if (cp->ClockDivFactor < 1)
- cp->ClockDivFactor = 1;
-
- /*
- * XXX The effect of clock dividers and multipliers on the monitor's
- * pixel clock needs to be verified.
- */
- if (scrp->progClock) {
- mode->SynthClock = mode->Clock;
- } else {
- i = xf86GetNearestClock(scrp, mode->Clock, allowDiv2,
- cp->ClockDivFactor, cp->ClockMulFactor,
- &needDiv2);
- mode->SynthClock = (scrp->clock[i] * cp->ClockDivFactor) /
- cp->ClockMulFactor;
- if (needDiv2 & V_CLKDIV2)
- mode->SynthClock /= 2;
- }
-
- status = (*scrp->ValidMode)(scrp->scrnIndex, mode, FALSE,
- MODECHECK_INITIAL);
- if (status != MODE_OK)
- return status;
-
- if (mode->HSync <= 0.0)
- mode->HSync = (float)mode->SynthClock / (float)mode->CrtcHTotal;
- if (mode->VRefresh <= 0.0)
- mode->VRefresh = (mode->SynthClock * 1000.0)
- / (mode->CrtcHTotal * mode->CrtcVTotal);
- }
-
- mode->HSync = xf86ModeHSync(mode);
- mode->VRefresh = xf86ModeVRefresh(mode);
-
- /* Assume it is OK */
- return MODE_OK;
-}
-
-/*
- * xf86CheckModeForDriver
- *
- * This function is for checking modes while the server is running (for
- * use mainly by the VidMode extension).
- *
- * This function checks if a mode satisfies a driver's requirements:
- * - width lies within the line pitch
- * - mode size fits within virtual size
- * - horizontal/vertical timings are in range
- *
- * This function takes the following parameters:
- * scrp ScrnInfoPtr
- * mode mode to check
- * flags not (currently) used
- *
- * In addition, the following fields from the ScrnInfoRec are used:
- * maxHValue maximum horizontal timing value
- * maxVValue maximum vertical timing value
- * virtualX virtual width
- * virtualY virtual height
- * clockRanges allowable clock ranges
- */
-
-ModeStatus
-xf86CheckModeForDriver(ScrnInfoPtr scrp, DisplayModePtr mode, int flags)
-{
- ClockRangePtr cp;
- int i, k, gap, minimumGap = CLOCK_TOLERANCE + 1;
- int extraFlags = 0;
- int clockIndex = -1;
- int MulFactor = 1;
- int DivFactor = 1;
- int ModePrivFlags = 0;
- ModeStatus status = MODE_NOMODE;
-
- /* Some sanity checking */
- if (scrp == NULL || (!scrp->progClock && scrp->numClocks == 0)) {
- ErrorF("xf86CheckModeForDriver: called with invalid scrnInfoRec\n");
- return MODE_ERROR;
- }
- if (mode == NULL) {
- ErrorF("xf86CheckModeForDriver: called with invalid modep\n");
- return MODE_ERROR;
- }
-
- /* Check the mode size */
- if (mode->HDisplay > scrp->virtualX)
- return MODE_VIRTUAL_X;
-
- if (mode->VDisplay > scrp->virtualY)
- return MODE_VIRTUAL_Y;
-
- if (scrp->maxHValue > 0 && mode->HTotal > scrp->maxHValue)
- return MODE_BAD_HVALUE;
-
- if (scrp->maxVValue > 0 && mode->VTotal > scrp->maxVValue)
- return MODE_BAD_VVALUE;
-
- for (cp = scrp->clockRanges; cp != NULL; cp = cp->next) {
- /* DivFactor and MulFactor must be > 0 */
- cp->ClockDivFactor = max(1, cp->ClockDivFactor);
- cp->ClockMulFactor = max(1, cp->ClockMulFactor);
- }
-
- if (scrp->progClock) {
- /* Check clock is in range */
- for (cp = scrp->clockRanges; cp != NULL; cp = cp->next) {
- if (modeInClockRange(cp, mode))
- break;
- }
- if (cp == NULL) {
- return MODE_CLOCK_RANGE;
- }
- /*
- * If programmable clock the required mode has been found
- */
- DivFactor = cp->ClockDivFactor;
- MulFactor = cp->ClockMulFactor;
- ModePrivFlags = cp->PrivFlags;
- } else {
- status = MODE_CLOCK_RANGE;
- /* Check clock is in range */
- for (cp = scrp->clockRanges; cp != NULL; cp = cp->next) {
- if (modeInClockRange(cp, mode)) {
- /*
- * Clock is in range, so if it is not a programmable clock,
- * find a matching clock.
- */
-
- i = xf86GetNearestClock(scrp, mode->Clock, 0,
- cp->ClockDivFactor, cp->ClockMulFactor, &k);
- /*
- * If the clock is too far from the requested clock, this
- * mode is no good.
- */
- if (k & V_CLKDIV2)
- gap = abs((mode->Clock * 2) -
- ((scrp->clock[i] * cp->ClockDivFactor) /
- cp->ClockMulFactor));
- else
- gap = abs(mode->Clock -
- ((scrp->clock[i] * cp->ClockDivFactor) /
- cp->ClockMulFactor));
- if (gap > minimumGap) {
- status = MODE_NOCLOCK;
- continue;
- }
-
- DivFactor = cp->ClockDivFactor;
- MulFactor = cp->ClockMulFactor;
- ModePrivFlags = cp->PrivFlags;
- extraFlags = k;
- clockIndex = i;
- break;
- }
- }
- if (cp == NULL)
- return status;
- }
-
- /* Fill in the mode parameters */
- if (scrp->progClock) {
- mode->ClockIndex = -1;
- mode->SynthClock = (mode->Clock * MulFactor) / DivFactor;
- } else {
- mode->Clock = (scrp->clock[clockIndex] * DivFactor) / MulFactor;
- mode->ClockIndex = clockIndex;
- mode->SynthClock = scrp->clock[clockIndex];
- if (extraFlags & V_CLKDIV2) {
- mode->Clock /= 2;
- mode->SynthClock /= 2;
- }
- }
- mode->PrivFlags = ModePrivFlags;
-
- return MODE_OK;
-}
-
-static int
-inferVirtualSize(ScrnInfoPtr scrp, DisplayModePtr modes, int *vx, int *vy)
-{
- float aspect = 0.0;
- MonPtr mon = scrp->monitor;
- xf86MonPtr DDC;
- int x = 0, y = 0;
- DisplayModePtr mode;
-
- if (!mon) return 0;
- DDC = mon->DDC;
-
- if (DDC && DDC->ver.revision >= 4) {
- /* For 1.4, we might actually get native pixel format. How novel. */
- if (PREFERRED_TIMING_MODE(DDC->features.msc)) {
- for (mode = modes; mode; mode = mode->next) {
- if (mode->type & (M_T_DRIVER | M_T_PREFERRED)) {
- x = mode->HDisplay;
- y = mode->VDisplay;
- goto found;
- }
- }
- }
- /*
- * Even if we don't, we might get aspect ratio from extra CVT info
- * or from the monitor size fields. TODO.
- */
- }
-
- /*
- * Technically this triggers if either is zero. That wasn't legal
- * before EDID 1.4, but right now we'll get that wrong. TODO.
- */
- if (!aspect) {
- if (!mon->widthmm || !mon->heightmm)
- aspect = 4.0/3.0;
- else
- aspect = (float)mon->widthmm / (float)mon->heightmm;
- }
-
- /* find the largest M_T_DRIVER mode with that aspect ratio */
- for (mode = modes; mode; mode = mode->next) {
- float mode_aspect, metaspect;
- if (!(mode->type & (M_T_DRIVER|M_T_USERDEF)))
- continue;
- mode_aspect = (float)mode->HDisplay / (float)mode->VDisplay;
- metaspect = aspect / mode_aspect;
- /* 5% slop or so, since we only get size in centimeters */
- if (fabs(1.0 - metaspect) < 0.05) {
- if ((mode->HDisplay > x) && (mode->VDisplay > y)) {
- x = mode->HDisplay;
- y = mode->VDisplay;
- }
- }
- }
-
- if (!x || !y) {
- xf86DrvMsg(scrp->scrnIndex, X_WARNING,
- "Unable to estimate virtual size\n");
- return 0;
- }
-
-found:
- *vx = x;
- *vy = y;
-
- xf86DrvMsg(scrp->scrnIndex, X_INFO,
- "Estimated virtual size for aspect ratio %.4f is %dx%d\n",
- aspect, *vx, *vy);
-
- return 1;
-}
-
-/* Least common multiple */
-static unsigned int
-LCM(unsigned int x, unsigned int y)
-{
- unsigned int m = x, n = y, o;
-
- while ((o = m % n))
- {
- m = n;
- n = o;
- }
-
- return (x / n) * y;
-}
-
-/*
- * Given various screen attributes, determine the minimum scanline width such
- * that each scanline is server and DDX padded and any pixels with imbedded
- * bank boundaries are off-screen. This function returns -1 if such a width
- * cannot exist.
- */
-static int
-scanLineWidth(
- unsigned int xsize, /* pixels */
- unsigned int ysize, /* pixels */
- unsigned int width, /* pixels */
- unsigned long BankSize, /* char's */
- PixmapFormatRec *pBankFormat,
- unsigned int nWidthUnit /* bits */
-)
-{
- unsigned long nBitsPerBank, nBitsPerScanline, nBitsPerScanlinePadUnit;
- unsigned long minBitsPerScanline, maxBitsPerScanline;
-
- /* Sanity checks */
-
- if (!nWidthUnit || !pBankFormat)
- return -1;
-
- nBitsPerBank = BankSize * 8;
- if (nBitsPerBank % pBankFormat->scanlinePad)
- return -1;
-
- if (xsize > width)
- width = xsize;
- nBitsPerScanlinePadUnit = LCM(pBankFormat->scanlinePad, nWidthUnit);
- nBitsPerScanline =
- (((width * pBankFormat->bitsPerPixel) + nBitsPerScanlinePadUnit - 1) /
- nBitsPerScanlinePadUnit) * nBitsPerScanlinePadUnit;
- width = nBitsPerScanline / pBankFormat->bitsPerPixel;
-
- if (!xsize || !(nBitsPerBank % pBankFormat->bitsPerPixel))
- return (int)width;
-
- /*
- * Scanlines will be server-pad aligned at this point. They will also be
- * a multiple of nWidthUnit bits long. Ensure that pixels with imbedded
- * bank boundaries are off-screen.
- *
- * It seems reasonable to limit total frame buffer size to 1/16 of the
- * theoretical maximum address space size. On a machine with 32-bit
- * addresses (to 8-bit quantities) this turns out to be 256MB. Not only
- * does this provide a simple limiting condition for the loops below, but
- * it also prevents unsigned long wraparounds.
- */
- if (!ysize)
- return -1;
-
- minBitsPerScanline = xsize * pBankFormat->bitsPerPixel;
- if (minBitsPerScanline > nBitsPerBank)
- return -1;
-
- if (ysize == 1)
- return (int)width;
-
- maxBitsPerScanline =
- (((unsigned long)(-1) >> 1) - minBitsPerScanline) / (ysize - 1);
- while (nBitsPerScanline <= maxBitsPerScanline)
- {
- unsigned long BankBase, BankUnit;
-
- BankUnit = ((nBitsPerBank + nBitsPerScanline - 1) / nBitsPerBank) *
- nBitsPerBank;
- if (!(BankUnit % nBitsPerScanline))
- return (int)width;
-
- for (BankBase = BankUnit; ; BankBase += nBitsPerBank)
- {
- unsigned long x, y;
-
- y = BankBase / nBitsPerScanline;
- if (y >= ysize)
- return (int)width;
-
- x = BankBase % nBitsPerScanline;
- if (!(x % pBankFormat->bitsPerPixel))
- continue;
-
- if (x < minBitsPerScanline)
- {
- /*
- * Skip ahead certain widths by dividing the excess scanline
- * amongst the y's.
- */
- y *= nBitsPerScanlinePadUnit;
- nBitsPerScanline +=
- ((x + y - 1) / y) * nBitsPerScanlinePadUnit;
- width = nBitsPerScanline / pBankFormat->bitsPerPixel;
- break;
- }
-
- if (BankBase != BankUnit)
- continue;
-
- if (!(nBitsPerScanline % x))
- return (int)width;
-
- BankBase = ((nBitsPerScanline - minBitsPerScanline) /
- (nBitsPerScanline - x)) * BankUnit;
- }
- }
-
- return -1;
-}
-
-/*
- * xf86ValidateModes
- *
- * This function takes a set of mode names, modes and limiting conditions,
- * and selects a set of modes and parameters based on those conditions.
- *
- * This function takes the following parameters:
- * scrp ScrnInfoPtr
- * availModes the list of modes available for the monitor
- * modeNames (optional) list of mode names that the screen is requesting
- * clockRanges a list of clock ranges
- * linePitches (optional) a list of line pitches
- * minPitch (optional) minimum line pitch (in pixels)
- * maxPitch (optional) maximum line pitch (in pixels)
- * pitchInc (mandatory) pitch increment (in bits)
- * minHeight (optional) minimum virtual height (in pixels)
- * maxHeight (optional) maximum virtual height (in pixels)
- * virtualX (optional) virtual width requested (in pixels)
- * virtualY (optional) virtual height requested (in pixels)
- * apertureSize size of video aperture (in bytes)
- * strategy how to decide which mode to use from multiple modes with
- * the same name
- *
- * In addition, the following fields from the ScrnInfoRec are used:
- * clocks a list of discrete clocks
- * numClocks number of discrete clocks
- * progClock clock is programmable
- * monitor pointer to structure for monitor section
- * fbFormat format of the framebuffer
- * videoRam video memory size
- * maxHValue maximum horizontal timing value
- * maxVValue maximum vertical timing value
- * xInc horizontal timing increment (defaults to 8 pixels)
- *
- * The function fills in the following ScrnInfoRec fields:
- * modePool A subset of the modes available to the monitor which
- * are compatible with the driver.
- * modes one mode entry for each of the requested modes, with the
- * status field filled in to indicate if the mode has been
- * accepted or not.
- * virtualX the resulting virtual width
- * virtualY the resulting virtual height
- * displayWidth the resulting line pitch
- *
- * The function's return value is the number of matching modes found, or -1
- * if an unrecoverable error was encountered.
- */
-
-int
-xf86ValidateModes(ScrnInfoPtr scrp, DisplayModePtr availModes,
- char **modeNames, ClockRangePtr clockRanges,
- int *linePitches, int minPitch, int maxPitch, int pitchInc,
- int minHeight, int maxHeight, int virtualX, int virtualY,
- int apertureSize, LookupModeFlags strategy)
-{
- DisplayModePtr p, q, r, new, last, *endp;
- int i, numModes = 0;
- ModeStatus status;
- int linePitch = -1, virtX = 0, virtY = 0;
- int newLinePitch, newVirtX, newVirtY;
- int modeSize; /* in pixels */
- Bool validateAllDefaultModes = FALSE;
- Bool userModes = FALSE;
- int saveType;
- PixmapFormatRec *BankFormat;
- ClockRangePtr cp;
- ClockRangePtr storeClockRanges;
- int numTimings = 0;
- range hsync[MAX_HSYNC];
- range vrefresh[MAX_VREFRESH];
- Bool inferred_virtual = FALSE;
-
- DebugF("xf86ValidateModes(%p, %p, %p, %p,\n\t\t %p, %d, %d, %d, %d, %d, %d, %d, %d, 0x%x)\n",
- scrp, availModes, modeNames, clockRanges,
- linePitches, minPitch, maxPitch, pitchInc,
- minHeight, maxHeight, virtualX, virtualY,
- apertureSize, strategy
- );
-
- /* Some sanity checking */
- if (scrp == NULL || scrp->name == NULL || !scrp->monitor ||
- (!scrp->progClock && scrp->numClocks == 0)) {
- ErrorF("xf86ValidateModes: called with invalid scrnInfoRec\n");
- return -1;
- }
- if (linePitches != NULL && linePitches[0] <= 0) {
- ErrorF("xf86ValidateModes: called with invalid linePitches\n");
- return -1;
- }
- if (pitchInc <= 0) {
- ErrorF("xf86ValidateModes: called with invalid pitchInc\n");
- return -1;
- }
- if ((virtualX > 0) != (virtualY > 0)) {
- ErrorF("xf86ValidateModes: called with invalid virtual resolution\n");
- return -1;
- }
-
- /*
- * If requested by the driver, allow missing hsync and/or vrefresh ranges
- * in the monitor section.
- */
- if (strategy & LOOKUP_OPTIONAL_TOLERANCES) {
- strategy &= ~LOOKUP_OPTIONAL_TOLERANCES;
- } else {
- const char *type = "";
- Bool specified = FALSE;
-
- if (scrp->monitor->nHsync <= 0) {
- if (numTimings > 0) {
- scrp->monitor->nHsync = numTimings;
- for (i = 0; i < numTimings; i++) {
- scrp->monitor->hsync[i].lo = hsync[i].lo;
- scrp->monitor->hsync[i].hi = hsync[i].hi;
- }
- } else {
- scrp->monitor->hsync[0].lo = 31.5;
- scrp->monitor->hsync[0].hi = 48.0;
- scrp->monitor->nHsync = 1;
- }
- type = "default ";
- } else {
- specified = TRUE;
- }
- for (i = 0; i < scrp->monitor->nHsync; i++) {
- if (scrp->monitor->hsync[i].lo == scrp->monitor->hsync[i].hi)
- xf86DrvMsg(scrp->scrnIndex, X_INFO,
- "%s: Using %shsync value of %.2f kHz\n",
- scrp->monitor->id, type,
- scrp->monitor->hsync[i].lo);
- else
- xf86DrvMsg(scrp->scrnIndex, X_INFO,
- "%s: Using %shsync range of %.2f-%.2f kHz\n",
- scrp->monitor->id, type,
- scrp->monitor->hsync[i].lo,
- scrp->monitor->hsync[i].hi);
- }
-
- type = "";
- if (scrp->monitor->nVrefresh <= 0) {
- if (numTimings > 0) {
- scrp->monitor->nVrefresh = numTimings;
- for (i = 0; i < numTimings; i++) {
- scrp->monitor->vrefresh[i].lo = vrefresh[i].lo;
- scrp->monitor->vrefresh[i].hi = vrefresh[i].hi;
- }
- } else {
- scrp->monitor->vrefresh[0].lo = 50;
- scrp->monitor->vrefresh[0].hi = 70;
- scrp->monitor->nVrefresh = 1;
- }
- type = "default ";
- } else {
- specified = TRUE;
- }
- for (i = 0; i < scrp->monitor->nVrefresh; i++) {
- if (scrp->monitor->vrefresh[i].lo == scrp->monitor->vrefresh[i].hi)
- xf86DrvMsg(scrp->scrnIndex, X_INFO,
- "%s: Using %svrefresh value of %.2f Hz\n",
- scrp->monitor->id, type,
- scrp->monitor->vrefresh[i].lo);
- else
- xf86DrvMsg(scrp->scrnIndex, X_INFO,
- "%s: Using %svrefresh range of %.2f-%.2f Hz\n",
- scrp->monitor->id, type,
- scrp->monitor->vrefresh[i].lo,
- scrp->monitor->vrefresh[i].hi);
- }
-
- type = "";
- if (!scrp->monitor->maxPixClock && !specified) {
- type = "default ";
- scrp->monitor->maxPixClock = 65000.0;
- }
- if (scrp->monitor->maxPixClock) {
- xf86DrvMsg(scrp->scrnIndex, X_INFO,
- "%s: Using %smaximum pixel clock of %.2f MHz\n",
- scrp->monitor->id, type,
- (float)scrp->monitor->maxPixClock / 1000.0);
- }
- }
-
- /*
- * Store the clockRanges for later use by the VidMode extension.
- */
- storeClockRanges = scrp->clockRanges;
- while (storeClockRanges != NULL) {
- storeClockRanges = storeClockRanges->next;
- }
- for (cp = clockRanges; cp != NULL; cp = cp->next,
- storeClockRanges = storeClockRanges->next) {
- storeClockRanges = xnfalloc(sizeof(ClockRange));
- if (scrp->clockRanges == NULL)
- scrp->clockRanges = storeClockRanges;
- memcpy(storeClockRanges, cp, sizeof(ClockRange));
- }
-
- /* Determine which pixmap format to pass to scanLineWidth() */
- if (scrp->depth > 4)
- BankFormat = &scrp->fbFormat;
- else
- BankFormat = xf86GetPixFormat(scrp, 1); /* >not< scrp->depth! */
-
- if (scrp->xInc <= 0)
- scrp->xInc = 8; /* Suitable for VGA and others */
-
-#define _VIRTUALX(x) ((((x) + scrp->xInc - 1) / scrp->xInc) * scrp->xInc)
-
- /*
- * Determine maxPitch if it wasn't given explicitly. Note linePitches
- * always takes precedence if is non-NULL. In that case the minPitch and
- * maxPitch values passed are ignored.
- */
- if (linePitches) {
- minPitch = maxPitch = linePitches[0];
- for (i = 1; linePitches[i] > 0; i++) {
- if (linePitches[i] > maxPitch)
- maxPitch = linePitches[i];
- if (linePitches[i] < minPitch)
- minPitch = linePitches[i];
- }
- }
-
- /* Initial check of virtual size against other constraints */
- scrp->virtualFrom = X_PROBED;
- /*
- * Initialise virtX and virtY if the values are fixed.
- */
- if (virtualY > 0) {
- if (maxHeight > 0 && virtualY > maxHeight) {
- xf86DrvMsg(scrp->scrnIndex, X_ERROR,
- "Virtual height (%d) is too large for the hardware "
- "(max %d)\n", virtualY, maxHeight);
- return -1;
- }
-
- if (minHeight > 0 && virtualY < minHeight) {
- xf86DrvMsg(scrp->scrnIndex, X_ERROR,
- "Virtual height (%d) is too small for the hardware "
- "(min %d)\n", virtualY, minHeight);
- return -1;
- }
-
- virtualX = _VIRTUALX(virtualX);
- if (linePitches != NULL) {
- for (i = 0; linePitches[i] != 0; i++) {
- if ((linePitches[i] >= virtualX) &&
- (linePitches[i] ==
- scanLineWidth(virtualX, virtualY, linePitches[i],
- apertureSize, BankFormat, pitchInc))) {
- linePitch = linePitches[i];
- break;
- }
- }
- } else {
- linePitch = scanLineWidth(virtualX, virtualY, minPitch,
- apertureSize, BankFormat, pitchInc);
- }
-
- if ((linePitch < minPitch) || (linePitch > maxPitch)) {
- xf86DrvMsg(scrp->scrnIndex, X_ERROR,
- "Virtual width (%d) is too large for the hardware "
- "(max %d)\n", virtualX, maxPitch);
- return -1;
- }
-
- if (!xf86CheckModeSize(scrp, linePitch, virtualX, virtualY)) {
- xf86DrvMsg(scrp->scrnIndex, X_ERROR,
- "Virtual size (%dx%d) (pitch %d) exceeds video memory\n",
- virtualX, virtualY, linePitch);
- return -1;
- }
-
- virtX = virtualX;
- virtY = virtualY;
- scrp->virtualFrom = X_CONFIG;
- } else if (!modeNames || !*modeNames) {
- /* No virtual size given in the config, try to infer */
- /* XXX this doesn't take m{in,ax}Pitch into account; oh well */
- inferred_virtual = inferVirtualSize(scrp, availModes, &virtX, &virtY);
- if (inferred_virtual)
- linePitch = scanLineWidth(virtX, virtY, minPitch, apertureSize,
- BankFormat, pitchInc);
- }
-
- /* Print clock ranges and scaled clocks */
- xf86ShowClockRanges(scrp, clockRanges);
-
- /*
- * If scrp->modePool hasn't been setup yet, set it up now. This allows the
- * modes that the driver definitely can't use to be weeded out early. Note
- * that a modePool mode's prev field is used to hold a pointer to the
- * member of the scrp->modes list for which a match was considered.
- */
- if (scrp->modePool == NULL) {
- q = NULL;
- for (p = availModes; p != NULL; p = p->next) {
- status = xf86InitialCheckModeForDriver(scrp, p, clockRanges,
- strategy, maxPitch,
- virtX, virtY);
-
- if (status == MODE_OK) {
- status = xf86CheckModeForMonitor(p, scrp->monitor);
- }
-
- if (status == MODE_OK) {
- new = xnfalloc(sizeof(DisplayModeRec));
- *new = *p;
- new->next = NULL;
- if (!q) {
- scrp->modePool = new;
- } else {
- q->next = new;
- }
- new->prev = NULL;
- q = new;
- q->name = xnfstrdup(p->name);
- q->status = MODE_OK;
- } else {
- printModeRejectMessage(scrp->scrnIndex, p, status);
- }
- }
-
- if (scrp->modePool == NULL) {
- xf86DrvMsg(scrp->scrnIndex, X_WARNING, "Mode pool is empty\n");
- return 0;
- }
- } else {
- for (p = scrp->modePool; p != NULL; p = p->next) {
- p->prev = NULL;
- p->status = MODE_OK;
- }
- }
-
- /*
- * Allocate one entry in scrp->modes for each named mode.
- */
- while (scrp->modes)
- xf86DeleteMode(&scrp->modes, scrp->modes);
- endp = &scrp->modes;
- last = NULL;
- if (modeNames != NULL) {
- for (i = 0; modeNames[i] != NULL; i++) {
- userModes = TRUE;
- new = xnfcalloc(1, sizeof(DisplayModeRec));
- new->prev = last;
- new->type = M_T_USERDEF;
- new->name = xnfstrdup(modeNames[i]);
- if (new->prev)
- new->prev->next = new;
- *endp = last = new;
- endp = &new->next;
- }
- }
-
- /* Lookup each mode */
-#ifdef RANDR
- if (!xf86Info.disableRandR
-#ifdef PANORAMIX
- && noPanoramiXExtension
-#endif
- )
- validateAllDefaultModes = TRUE;
-#endif
-
- for (p = scrp->modes; ; p = p->next) {
- Bool repeat;
-
- /*
- * If the supplied mode names don't produce a valid mode, scan through
- * unconsidered modePool members until one survives validation. This
- * is done in decreasing order by mode pixel area.
- */
-
- if (p == NULL) {
- if ((numModes > 0) && !validateAllDefaultModes)
- break;
-
- validateAllDefaultModes = TRUE;
- r = NULL;
- modeSize = 0;
- for (q = scrp->modePool; q != NULL; q = q->next) {
- if ((q->prev == NULL) && (q->status == MODE_OK)) {
- /*
- * Deal with the case where this mode wasn't considered
- * because of a builtin mode of the same name.
- */
- for (p = scrp->modes; p != NULL; p = p->next) {
- if ((p->status != MODE_OK) &&
- !strcmp(p->name, q->name))
- break;
- }
-
- if (p != NULL)
- q->prev = p;
- else {
- /*
- * A quick check to not allow default modes with
- * horizontal timing parameters that CRTs may have
- * problems with.
- */
- if (!scrp->monitor->reducedblanking &&
- (q->type & M_T_DEFAULT) &&
- ((double)q->HTotal / (double)q->HDisplay) < 1.15)
- continue;
-
- if (modeSize < (q->HDisplay * q->VDisplay)) {
- r = q;
- modeSize = q->HDisplay * q->VDisplay;
- }
- }
- }
- }
-
- if (r == NULL)
- break;
-
- p = xnfcalloc(1, sizeof(DisplayModeRec));
- p->prev = last;
- p->name = xnfstrdup(r->name);
- if (!userModes)
- p->type = M_T_USERDEF;
- if (p->prev)
- p->prev->next = p;
- *endp = last = p;
- endp = &p->next;
- }
-
- repeat = FALSE;
- lookupNext:
- if (repeat && ((status = p->status) != MODE_OK))
- printModeRejectMessage(scrp->scrnIndex, p, status);
- saveType = p->type;
- status = xf86LookupMode(scrp, p, clockRanges, strategy);
- if (repeat && status == MODE_NOMODE)
- continue;
- if (status != MODE_OK)
- printModeRejectMessage(scrp->scrnIndex, p, status);
- if (status == MODE_ERROR) {
- ErrorF("xf86ValidateModes: "
- "unexpected result from xf86LookupMode()\n");
- return -1;
- }
- if (status != MODE_OK) {
- if (p->status == MODE_OK)
- p->status = status;
- continue;
- }
- p->type |= saveType;
- repeat = TRUE;
-
- newLinePitch = linePitch;
- newVirtX = virtX;
- newVirtY = virtY;
-
- /*
- * Don't let non-user defined modes increase the virtual size
- */
- if (!(p->type & M_T_USERDEF) && (numModes > 0)) {
- if (p->HDisplay > virtX) {
- p->status = MODE_VIRTUAL_X;
- goto lookupNext;
- }
- if (p->VDisplay > virtY) {
- p->status = MODE_VIRTUAL_Y;
- goto lookupNext;
- }
- }
- /*
- * Adjust virtual width and height if the mode is too large for the
- * current values and if they are not fixed.
- */
- if (virtualX <= 0 && p->HDisplay > newVirtX)
- newVirtX = _VIRTUALX(p->HDisplay);
- if (virtualY <= 0 && p->VDisplay > newVirtY) {
- if (maxHeight > 0 && p->VDisplay > maxHeight) {
- p->status = MODE_VIRTUAL_Y; /* ? */
- goto lookupNext;
- }
- newVirtY = p->VDisplay;
- }
-
- /*
- * If virtual resolution is to be increased, revalidate it.
- */
- if ((virtX != newVirtX) || (virtY != newVirtY)) {
- if (linePitches != NULL) {
- newLinePitch = -1;
- for (i = 0; linePitches[i] != 0; i++) {
- if ((linePitches[i] >= newVirtX) &&
- (linePitches[i] >= linePitch) &&
- (linePitches[i] ==
- scanLineWidth(newVirtX, newVirtY, linePitches[i],
- apertureSize, BankFormat, pitchInc))) {
- newLinePitch = linePitches[i];
- break;
- }
- }
- } else {
- if (linePitch < minPitch)
- linePitch = minPitch;
- newLinePitch = scanLineWidth(newVirtX, newVirtY, linePitch,
- apertureSize, BankFormat,
- pitchInc);
- }
- if ((newLinePitch < minPitch) || (newLinePitch > maxPitch)) {
- p->status = MODE_BAD_WIDTH;
- goto lookupNext;
- }
-
- /*
- * Check that the pixel area required by the new virtual height
- * and line pitch isn't too large.
- */
- if (!xf86CheckModeSize(scrp, newLinePitch, newVirtX, newVirtY)) {
- p->status = MODE_MEM_VIRT;
- goto lookupNext;
- }
- }
-
- if (scrp->ValidMode) {
- /*
- * Give the driver a final say, passing it the proposed virtual
- * geometry.
- */
- scrp->virtualX = newVirtX;
- scrp->virtualY = newVirtY;
- scrp->displayWidth = newLinePitch;
- p->status = (scrp->ValidMode)(scrp->scrnIndex, p, FALSE,
- MODECHECK_FINAL);
-
- if (p->status != MODE_OK) {
- goto lookupNext;
- }
- }
-
- /* Mode has passed all the tests */
- virtX = newVirtX;
- virtY = newVirtY;
- linePitch = newLinePitch;
- p->status = MODE_OK;
- numModes++;
- }
-
- /*
- * If we estimated the virtual size above, we may have filtered away all
- * the modes that maximally match that size; scan again to find out and
- * fix up if so.
- */
- if (inferred_virtual) {
- int vx = 0, vy = 0;
- for (p = scrp->modes; p; p = p->next) {
- if (p->HDisplay > vx && p->VDisplay > vy) {
- vx = p->HDisplay;
- vy = p->VDisplay;
- }
- }
- if (vx < virtX || vy < virtY) {
- const int types[] = {
- M_T_BUILTIN | M_T_PREFERRED,
- M_T_BUILTIN,
- M_T_DRIVER | M_T_PREFERRED,
- M_T_DRIVER,
- 0
- };
- const int ntypes = sizeof(types) / sizeof(int);
- int n;
-
- /*
- * We did not find the estimated virtual size. So now we want to
- * find the largest mode available, but we want to search in the
- * modes in the order of "types" listed above.
- */
- for (n = 0; n < ntypes; n++) {
- int type = types[n];
-
- vx = 0; vy = 0;
- for (p = scrp->modes; p; p = p->next) {
- /* scan through the modes in the sort order above */
- if ((p->type & type) != type)
- continue;
- if (p->HDisplay > vx && p->VDisplay > vy) {
- vx = p->HDisplay;
- vy = p->VDisplay;
- }
- }
- if (vx && vy)
- /* Found one */
- break;
- }
- xf86DrvMsg(scrp->scrnIndex, X_WARNING,
- "Shrinking virtual size estimate from %dx%d to %dx%d\n",
- virtX, virtY, vx, vy);
- virtX = _VIRTUALX(vx);
- virtY = vy;
- for (p = scrp->modes; p; p = p->next) {
- if (numModes > 0) {
- if (p->HDisplay > virtX)
- p->status = MODE_VIRTUAL_X;
- if (p->VDisplay > virtY)
- p->status = MODE_VIRTUAL_Y;
- if (p->status != MODE_OK) {
- numModes--;
- printModeRejectMessage(scrp->scrnIndex, p, p->status);
- }
- }
- }
- if (linePitches != NULL) {
- for (i = 0; linePitches[i] != 0; i++) {
- if ((linePitches[i] >= virtX) &&
- (linePitches[i] ==
- scanLineWidth(virtX, virtY, linePitches[i],
- apertureSize, BankFormat, pitchInc))) {
- linePitch = linePitches[i];
- break;
- }
- }
- } else {
- linePitch = scanLineWidth(virtX, virtY, minPitch,
- apertureSize, BankFormat, pitchInc);
- }
- }
- }
-
- /* Update the ScrnInfoRec parameters */
-
- scrp->virtualX = virtX;
- scrp->virtualY = virtY;
- scrp->displayWidth = linePitch;
-
- if (numModes <= 0)
- return 0;
-
- /* Make the mode list into a circular list by joining up the ends */
- p = scrp->modes;
- while (p->next != NULL)
- p = p->next;
- /* p is now the last mode on the list */
- p->next = scrp->modes;
- scrp->modes->prev = p;
-
- if (minHeight > 0 && virtY < minHeight) {
- xf86DrvMsg(scrp->scrnIndex, X_ERROR,
- "Virtual height (%d) is too small for the hardware "
- "(min %d)\n", virtY, minHeight);
- return -1;
- }
-
- return numModes;
-}
-
-/*
- * xf86DeleteMode
- *
- * This function removes a mode from a list of modes.
- *
- * There are different types of mode lists:
- *
- * - singly linked linear lists, ending in NULL
- * - doubly linked linear lists, starting and ending in NULL
- * - doubly linked circular lists
- *
- */
-
-void
-xf86DeleteMode(DisplayModePtr *modeList, DisplayModePtr mode)
-{
- /* Catch the easy/insane cases */
- if (modeList == NULL || *modeList == NULL || mode == NULL)
- return;
-
- /* If the mode is at the start of the list, move the start of the list */
- if (*modeList == mode)
- *modeList = mode->next;
-
- /* If mode is the only one on the list, set the list to NULL */
- if ((mode == mode->prev) && (mode == mode->next)) {
- *modeList = NULL;
- } else {
- if ((mode->prev != NULL) && (mode->prev->next == mode))
- mode->prev->next = mode->next;
- if ((mode->next != NULL) && (mode->next->prev == mode))
- mode->next->prev = mode->prev;
- }
-
- free(mode->name);
- free(mode);
-}
-
-/*
- * xf86PruneDriverModes
- *
- * Remove modes from the driver's mode list which have been marked as
- * invalid.
- */
-
-void
-xf86PruneDriverModes(ScrnInfoPtr scrp)
-{
- DisplayModePtr first, p, n;
-
- p = scrp->modes;
- if (p == NULL)
- return;
-
- do {
- if (!(first = scrp->modes))
- return;
- n = p->next;
- if (p->status != MODE_OK) {
- xf86DeleteMode(&(scrp->modes), p);
- }
- p = n;
- } while (p != NULL && p != first);
-
- /* modePool is no longer needed, turf it */
- while (scrp->modePool) {
- /*
- * A modePool mode's prev field is used to hold a pointer to the
- * member of the scrp->modes list for which a match was considered.
- * Clear that pointer first, otherwise xf86DeleteMode might get
- * confused
- */
- scrp->modePool->prev = NULL;
- xf86DeleteMode(&scrp->modePool, scrp->modePool);
- }
-}
-
-
-/*
- * xf86SetCrtcForModes
- *
- * Goes through the screen's mode list, and initialises the Crtc
- * parameters for each mode. The initialisation includes adjustments
- * for interlaced and double scan modes.
- */
-void
-xf86SetCrtcForModes(ScrnInfoPtr scrp, int adjustFlags)
-{
- DisplayModePtr p;
-
- /*
- * Store adjustFlags for use with the VidMode extension. There is an
- * implicit assumption here that SetCrtcForModes is called once.
- */
- scrp->adjustFlags = adjustFlags;
-
- p = scrp->modes;
- if (p == NULL)
- return;
-
- do {
- xf86SetModeCrtc(p, adjustFlags);
- DebugF("%sMode %s: %d (%d) %d %d (%d) %d %d (%d) %d %d (%d) %d\n",
- (p->type & M_T_DEFAULT) ? "Default " : "",
- p->name, p->CrtcHDisplay, p->CrtcHBlankStart,
- p->CrtcHSyncStart, p->CrtcHSyncEnd, p->CrtcHBlankEnd,
- p->CrtcHTotal, p->CrtcVDisplay, p->CrtcVBlankStart,
- p->CrtcVSyncStart, p->CrtcVSyncEnd, p->CrtcVBlankEnd,
- p->CrtcVTotal);
- p = p->next;
- } while (p != NULL && p != scrp->modes);
-}
-
-void
-xf86PrintModes(ScrnInfoPtr scrp)
-{
- DisplayModePtr p;
- float hsync, refresh = 0;
- char *desc, *desc2, *prefix, *uprefix;
-
- if (scrp == NULL)
- return;
-
- xf86DrvMsg(scrp->scrnIndex, scrp->virtualFrom, "Virtual size is %dx%d "
- "(pitch %d)\n", scrp->virtualX, scrp->virtualY,
- scrp->displayWidth);
-
- p = scrp->modes;
- if (p == NULL)
- return;
-
- do {
- desc = desc2 = "";
- hsync = xf86ModeHSync(p);
- refresh = xf86ModeVRefresh(p);
- if (p->Flags & V_INTERLACE) {
- desc = " (I)";
- }
- if (p->Flags & V_DBLSCAN) {
- desc = " (D)";
- }
- if (p->VScan > 1) {
- desc2 = " (VScan)";
- }
- if (p->type & M_T_BUILTIN)
- prefix = "Built-in mode";
- else if (p->type & M_T_DEFAULT)
- prefix = "Default mode";
- else if (p->type & M_T_DRIVER)
- prefix = "Driver mode";
- else
- prefix = "Mode";
- if (p->type & M_T_USERDEF)
- uprefix = "*";
- else
- uprefix = " ";
- if (hsync == 0 || refresh == 0) {
- if (p->name)
- xf86DrvMsg(scrp->scrnIndex, X_CONFIG,
- "%s%s \"%s\"\n", uprefix, prefix, p->name);
- else
- xf86DrvMsg(scrp->scrnIndex, X_PROBED,
- "%s%s %dx%d (unnamed)\n",
- uprefix, prefix, p->HDisplay, p->VDisplay);
- } else if (p->Clock == p->SynthClock) {
- xf86DrvMsg(scrp->scrnIndex, X_CONFIG,
- "%s%s \"%s\": %.1f MHz, %.1f kHz, %.1f Hz%s%s\n",
- uprefix, prefix, p->name, p->Clock / 1000.0,
- hsync, refresh, desc, desc2);
- } else {
- xf86DrvMsg(scrp->scrnIndex, X_CONFIG,
- "%s%s \"%s\": %.1f MHz (scaled from %.1f MHz), "
- "%.1f kHz, %.1f Hz%s%s\n",
- uprefix, prefix, p->name, p->Clock / 1000.0,
- p->SynthClock / 1000.0, hsync, refresh, desc, desc2);
- }
- if (hsync != 0 && refresh != 0)
- xf86PrintModeline(scrp->scrnIndex,p);
- p = p->next;
- } while (p != NULL && p != scrp->modes);
-}
+/*
+ * Copyright (c) 1997-2003 by The XFree86 Project, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name of the copyright holder(s)
+ * and author(s) shall not be used in advertising or otherwise to promote
+ * the sale, use or other dealings in this Software without prior written
+ * authorization from the copyright holder(s) and author(s).
+ */
+
+/*
+ * LCM() and scanLineWidth() are:
+ *
+ * Copyright 1997 through 2004 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.
+ *
+ * Copyright 1990,91,92,93 by Thomas Roell, Germany.
+ * Copyright 1991,92,93 by SGCS (Snitily Graphics Consulting Services), USA.
+ *
+ * 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 Thomas Roell nor
+ * SGCS be used in advertising or publicity pertaining to distribution
+ * of the software without specific, written prior permission.
+ * Thomas Roell nor SGCS makes no representations about the suitability
+ * of this software for any purpose. It is provided "as is" without
+ * express or implied warranty.
+ *
+ * THOMAS ROELL AND SGCS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THOMAS ROELL OR SGCS 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.
+ */
+
+/*
+ * Authors: Dirk Hohndel <hohndel@XFree86.Org>
+ * David Dawes <dawes@XFree86.Org>
+ * Marc La France <tsi@XFree86.Org>
+ * ... and others
+ *
+ * This file includes helper functions for mode related things.
+ */
+
+#ifdef HAVE_XORG_CONFIG_H
+#include <xorg-config.h>
+#endif
+
+#include <X11/X.h>
+#include "xf86Modes.h"
+#include "os.h"
+#include "servermd.h"
+#include "globals.h"
+#include "xf86.h"
+#include "xf86Priv.h"
+#include "edid.h"
+
+static void
+printModeRejectMessage(int index, DisplayModePtr p, int status)
+{
+ const char *type;
+
+ if (p->type & M_T_BUILTIN)
+ type = "built-in ";
+ else if (p->type & M_T_DEFAULT)
+ type = "default ";
+ else if (p->type & M_T_DRIVER)
+ type = "driver ";
+ else
+ type = "";
+
+ xf86DrvMsg(index, X_INFO, "Not using %smode \"%s\" (%s)\n", type, p->name,
+ xf86ModeStatusToString(status));
+}
+
+/*
+ * xf86GetNearestClock --
+ * Find closest clock to given frequency (in kHz). This assumes the
+ * number of clocks is greater than zero.
+ */
+int
+xf86GetNearestClock(ScrnInfoPtr scrp, int freq, Bool allowDiv2,
+ int DivFactor, int MulFactor, int *divider)
+{
+ int nearestClock = 0, nearestDiv = 1;
+ int minimumGap = abs(freq - scrp->clock[0]);
+ int i, j, k, gap;
+
+ if (allowDiv2)
+ k = 2;
+ else
+ k = 1;
+
+ /* Must set this here in case the best match is scrp->clock[0] */
+ if (divider != NULL)
+ *divider = 0;
+
+ for (i = 0; i < scrp->numClocks; i++) {
+ for (j = 1; j <= k; j++) {
+ gap = abs((freq * j) - ((scrp->clock[i] * DivFactor) / MulFactor));
+ if ((gap < minimumGap) ||
+ ((gap == minimumGap) && (j < nearestDiv))) {
+ minimumGap = gap;
+ nearestClock = i;
+ nearestDiv = j;
+ if (divider != NULL)
+ *divider = (j - 1) * V_CLKDIV2;
+ }
+ }
+ }
+ return nearestClock;
+}
+
+/*
+ * xf86ModeStatusToString
+ *
+ * Convert a ModeStatus value to a printable message
+ */
+
+const char *
+xf86ModeStatusToString(ModeStatus status)
+{
+ switch (status) {
+ case MODE_OK:
+ return "Mode OK";
+ case MODE_HSYNC:
+ return "hsync out of range";
+ case MODE_VSYNC:
+ return "vrefresh out of range";
+ case MODE_H_ILLEGAL:
+ return "illegal horizontal timings";
+ case MODE_V_ILLEGAL:
+ return "illegal vertical timings";
+ case MODE_BAD_WIDTH:
+ return "width requires unsupported line pitch";
+ case MODE_NOMODE:
+ return "no mode of this name";
+ case MODE_NO_INTERLACE:
+ return "interlace mode not supported";
+ case MODE_NO_DBLESCAN:
+ return "doublescan mode not supported";
+ case MODE_NO_VSCAN:
+ return "multiscan mode not supported";
+ case MODE_MEM:
+ return "insufficient memory for mode";
+ case MODE_VIRTUAL_X:
+ return "width too large for virtual size";
+ case MODE_VIRTUAL_Y:
+ return "height too large for virtual size";
+ case MODE_MEM_VIRT:
+ return "insufficient memory given virtual size";
+ case MODE_NOCLOCK:
+ return "no clock available for mode";
+ case MODE_CLOCK_HIGH:
+ return "mode clock too high";
+ case MODE_CLOCK_LOW:
+ return "mode clock too low";
+ case MODE_CLOCK_RANGE:
+ return "bad mode clock/interlace/doublescan";
+ case MODE_BAD_HVALUE:
+ return "horizontal timing out of range";
+ case MODE_BAD_VVALUE:
+ return "vertical timing out of range";
+ case MODE_BAD_VSCAN:
+ return "VScan value out of range";
+ case MODE_HSYNC_NARROW:
+ return "horizontal sync too narrow";
+ case MODE_HSYNC_WIDE:
+ return "horizontal sync too wide";
+ case MODE_HBLANK_NARROW:
+ return "horizontal blanking too narrow";
+ case MODE_HBLANK_WIDE:
+ return "horizontal blanking too wide";
+ case MODE_VSYNC_NARROW:
+ return "vertical sync too narrow";
+ case MODE_VSYNC_WIDE:
+ return "vertical sync too wide";
+ case MODE_VBLANK_NARROW:
+ return "vertical blanking too narrow";
+ case MODE_VBLANK_WIDE:
+ return "vertical blanking too wide";
+ case MODE_PANEL:
+ return "exceeds panel dimensions";
+ case MODE_INTERLACE_WIDTH:
+ return "width too large for interlaced mode";
+ case MODE_ONE_WIDTH:
+ return "all modes must have the same width";
+ case MODE_ONE_HEIGHT:
+ return "all modes must have the same height";
+ case MODE_ONE_SIZE:
+ return "all modes must have the same resolution";
+ case MODE_NO_REDUCED:
+ return "monitor doesn't support reduced blanking";
+ case MODE_BANDWIDTH:
+ return "mode requires too much memory bandwidth";
+ case MODE_BAD:
+ return "unknown reason";
+ case MODE_ERROR:
+ return "internal error";
+ default:
+ return "unknown";
+ }
+}
+
+/*
+ * xf86ShowClockRanges() -- Print the clock ranges allowed
+ * and the clock values scaled by ClockMulFactor and ClockDivFactor
+ */
+void
+xf86ShowClockRanges(ScrnInfoPtr scrp, ClockRangePtr clockRanges)
+{
+ ClockRangePtr cp;
+ int MulFactor = 1;
+ int DivFactor = 1;
+ int i, j;
+ int scaledClock;
+
+ for (cp = clockRanges; cp != NULL; cp = cp->next) {
+ DivFactor = max(1, cp->ClockDivFactor);
+ MulFactor = max(1, cp->ClockMulFactor);
+ if (scrp->progClock) {
+ if (cp->minClock) {
+ if (cp->maxClock) {
+ xf86DrvMsg(scrp->scrnIndex, X_INFO,
+ "Clock range: %6.2f to %6.2f MHz\n",
+ (double)cp->minClock / 1000.0,
+ (double)cp->maxClock / 1000.0);
+ } else {
+ xf86DrvMsg(scrp->scrnIndex, X_INFO,
+ "Minimum clock: %6.2f MHz\n",
+ (double)cp->minClock / 1000.0);
+ }
+ } else {
+ if (cp->maxClock) {
+ xf86DrvMsg(scrp->scrnIndex, X_INFO,
+ "Maximum clock: %6.2f MHz\n",
+ (double)cp->maxClock / 1000.0);
+ }
+ }
+ } else if (DivFactor > 1 || MulFactor > 1) {
+ j = 0;
+ for (i = 0; i < scrp->numClocks; i++) {
+ scaledClock = (scrp->clock[i] * DivFactor) / MulFactor;
+ if (scaledClock >= cp->minClock && scaledClock <= cp->maxClock) {
+ if ((j % 8) == 0) {
+ if (j > 0)
+ xf86ErrorF("\n");
+ xf86DrvMsg(scrp->scrnIndex, X_INFO, "scaled clocks:");
+ }
+ xf86ErrorF(" %6.2f", (double)scaledClock / 1000.0);
+ j++;
+ }
+ }
+ xf86ErrorF("\n");
+ }
+ }
+}
+
+static Bool
+modeInClockRange(ClockRangePtr cp, DisplayModePtr p)
+{
+ return ((p->Clock >= cp->minClock) &&
+ (p->Clock <= cp->maxClock) &&
+ (cp->interlaceAllowed || !(p->Flags & V_INTERLACE)) &&
+ (cp->doubleScanAllowed ||
+ ((p->VScan <= 1) && !(p->Flags & V_DBLSCAN))));
+}
+
+/*
+ * xf86FindClockRangeForMode() [... like the name says ...]
+ */
+static ClockRangePtr
+xf86FindClockRangeForMode(ClockRangePtr clockRanges, DisplayModePtr p)
+{
+ ClockRangePtr cp;
+
+ for (cp = clockRanges; ; cp = cp->next)
+ if (!cp || modeInClockRange(cp, p))
+ return cp;
+}
+
+
+/*
+ * xf86HandleBuiltinMode() - handles built-in modes
+ */
+static ModeStatus
+xf86HandleBuiltinMode(ScrnInfoPtr scrp,
+ DisplayModePtr p,
+ DisplayModePtr modep,
+ ClockRangePtr clockRanges,
+ Bool allowDiv2)
+{
+ ClockRangePtr cp;
+ int extraFlags = 0;
+ int MulFactor = 1;
+ int DivFactor = 1;
+ int clockIndex;
+
+ /* Reject previously rejected modes */
+ if (p->status != MODE_OK)
+ return p->status;
+
+ /* Reject previously considered modes */
+ if (p->prev)
+ return MODE_NOMODE;
+
+ if ((p->type & M_T_CLOCK_C) == M_T_CLOCK_C) {
+ /* Check clock is in range */
+ cp = xf86FindClockRangeForMode(clockRanges, p);
+ if (cp == NULL){
+ modep->type = p->type;
+ p->status = MODE_CLOCK_RANGE;
+ return MODE_CLOCK_RANGE;
+ }
+ DivFactor = cp->ClockDivFactor;
+ MulFactor = cp->ClockMulFactor;
+ if (!scrp->progClock) {
+ clockIndex = xf86GetNearestClock(scrp, p->Clock, allowDiv2,
+ cp->ClockDivFactor,
+ cp->ClockMulFactor, &extraFlags);
+ modep->Clock = (scrp->clock[clockIndex] * DivFactor)
+ / MulFactor;
+ modep->ClockIndex = clockIndex;
+ modep->SynthClock = scrp->clock[clockIndex];
+ if (extraFlags & V_CLKDIV2) {
+ modep->Clock /= 2;
+ modep->SynthClock /= 2;
+ }
+ } else {
+ modep->Clock = p->Clock;
+ modep->ClockIndex = -1;
+ modep->SynthClock = (modep->Clock * MulFactor)
+ / DivFactor;
+ }
+ modep->PrivFlags = cp->PrivFlags;
+ } else {
+ if(!scrp->progClock) {
+ modep->Clock = p->Clock;
+ modep->ClockIndex = p->ClockIndex;
+ modep->SynthClock = p->SynthClock;
+ } else {
+ modep->Clock = p->Clock;
+ modep->ClockIndex = -1;
+ modep->SynthClock = p->SynthClock;
+ }
+ modep->PrivFlags = p->PrivFlags;
+ }
+ modep->type = p->type;
+ modep->HDisplay = p->HDisplay;
+ modep->HSyncStart = p->HSyncStart;
+ modep->HSyncEnd = p->HSyncEnd;
+ modep->HTotal = p->HTotal;
+ modep->HSkew = p->HSkew;
+ modep->VDisplay = p->VDisplay;
+ modep->VSyncStart = p->VSyncStart;
+ modep->VSyncEnd = p->VSyncEnd;
+ modep->VTotal = p->VTotal;
+ modep->VScan = p->VScan;
+ modep->Flags = p->Flags | extraFlags;
+ modep->CrtcHDisplay = p->CrtcHDisplay;
+ modep->CrtcHBlankStart = p->CrtcHBlankStart;
+ modep->CrtcHSyncStart = p->CrtcHSyncStart;
+ modep->CrtcHSyncEnd = p->CrtcHSyncEnd;
+ modep->CrtcHBlankEnd = p->CrtcHBlankEnd;
+ modep->CrtcHTotal = p->CrtcHTotal;
+ modep->CrtcHSkew = p->CrtcHSkew;
+ modep->CrtcVDisplay = p->CrtcVDisplay;
+ modep->CrtcVBlankStart = p->CrtcVBlankStart;
+ modep->CrtcVSyncStart = p->CrtcVSyncStart;
+ modep->CrtcVSyncEnd = p->CrtcVSyncEnd;
+ modep->CrtcVBlankEnd = p->CrtcVBlankEnd;
+ modep->CrtcVTotal = p->CrtcVTotal;
+ modep->CrtcHAdjusted = p->CrtcHAdjusted;
+ modep->CrtcVAdjusted = p->CrtcVAdjusted;
+ modep->HSync = p->HSync;
+ modep->VRefresh = p->VRefresh;
+ modep->Private = p->Private;
+ modep->PrivSize = p->PrivSize;
+
+ p->prev = modep;
+
+ return MODE_OK;
+}
+
+/*
+ * xf86LookupMode
+ *
+ * This function returns a mode from the given list which matches the
+ * given name. When multiple modes with the same name are available,
+ * the method of picking the matching mode is determined by the
+ * strategy selected.
+ *
+ * This function takes the following parameters:
+ * scrp ScrnInfoPtr
+ * modep pointer to the returned mode, which must have the name
+ * field filled in.
+ * clockRanges a list of clock ranges. This is optional when all the
+ * modes are built-in modes.
+ * strategy how to decide which mode to use from multiple modes with
+ * the same name
+ *
+ * In addition, the following fields from the ScrnInfoRec are used:
+ * modePool the list of monitor modes compatible with the driver
+ * clocks a list of discrete clocks
+ * numClocks number of discrete clocks
+ * progClock clock is programmable
+ *
+ * If a mode was found, its values are filled in to the area pointed to
+ * by modep, If a mode was not found the return value indicates the
+ * reason.
+ */
+
+ModeStatus
+xf86LookupMode(ScrnInfoPtr scrp, DisplayModePtr modep,
+ ClockRangePtr clockRanges, LookupModeFlags strategy)
+{
+ DisplayModePtr p, bestMode = NULL;
+ ClockRangePtr cp;
+ int i, k, gap, minimumGap = CLOCK_TOLERANCE + 1;
+ double refresh, bestRefresh = 0.0;
+ Bool found = FALSE;
+ int extraFlags = 0;
+ int clockIndex = -1;
+ int MulFactor = 1;
+ int DivFactor = 1;
+ int ModePrivFlags = 0;
+ ModeStatus status = MODE_NOMODE;
+ Bool allowDiv2 = (strategy & LOOKUP_CLKDIV2) != 0;
+ int n;
+ const int types[] = {
+ M_T_BUILTIN | M_T_PREFERRED,
+ M_T_BUILTIN,
+ M_T_USERDEF | M_T_PREFERRED,
+ M_T_USERDEF,
+ M_T_DRIVER | M_T_PREFERRED,
+ M_T_DRIVER,
+ 0
+ };
+ const int ntypes = sizeof(types) / sizeof(int);
+
+ strategy &= ~(LOOKUP_CLKDIV2 | LOOKUP_OPTIONAL_TOLERANCES);
+
+ /* Some sanity checking */
+ if (scrp == NULL || scrp->modePool == NULL ||
+ (!scrp->progClock && scrp->numClocks == 0)) {
+ ErrorF("xf86LookupMode: called with invalid scrnInfoRec\n");
+ return MODE_ERROR;
+ }
+ if (modep == NULL || modep->name == NULL) {
+ ErrorF("xf86LookupMode: called with invalid modep\n");
+ return MODE_ERROR;
+ }
+ for (cp = clockRanges; cp != NULL; cp = cp->next) {
+ /* DivFactor and MulFactor must be > 0 */
+ cp->ClockDivFactor = max(1, cp->ClockDivFactor);
+ cp->ClockMulFactor = max(1, cp->ClockMulFactor);
+ }
+
+ /* Scan the mode pool for matching names */
+ for (n = 0; n < ntypes; n++) {
+ int type = types[n];
+ for (p = scrp->modePool; p != NULL; p = p->next) {
+
+ /* scan through the modes in the sort order above */
+ if ((p->type & type) != type)
+ continue;
+
+ if (strcmp(p->name, modep->name) == 0) {
+
+ /* Skip over previously rejected modes */
+ if (p->status != MODE_OK) {
+ if (!found)
+ status = p->status;
+ continue;
+ }
+
+ /* Skip over previously considered modes */
+ if (p->prev)
+ continue;
+
+ if (p->type & M_T_BUILTIN) {
+ return xf86HandleBuiltinMode(scrp, p,modep, clockRanges,
+ allowDiv2);
+ }
+
+ /* Check clock is in range */
+ cp = xf86FindClockRangeForMode(clockRanges, p);
+ if (cp == NULL) {
+ /*
+ * XXX Could do more here to provide a more detailed
+ * reason for not finding a mode.
+ */
+ p->status = MODE_CLOCK_RANGE;
+ if (!found)
+ status = MODE_CLOCK_RANGE;
+ continue;
+ }
+
+ /*
+ * If programmable clock and strategy is not
+ * LOOKUP_BEST_REFRESH, the required mode has been found,
+ * otherwise record the refresh and continue looking.
+ */
+ if (scrp->progClock) {
+ found = TRUE;
+ if (strategy != LOOKUP_BEST_REFRESH) {
+ bestMode = p;
+ DivFactor = cp->ClockDivFactor;
+ MulFactor = cp->ClockMulFactor;
+ ModePrivFlags = cp->PrivFlags;
+ break;
+ }
+ refresh = xf86ModeVRefresh(p);
+ if (p->Flags & V_INTERLACE)
+ refresh /= INTERLACE_REFRESH_WEIGHT;
+ if (refresh > bestRefresh) {
+ bestMode = p;
+ DivFactor = cp->ClockDivFactor;
+ MulFactor = cp->ClockMulFactor;
+ ModePrivFlags = cp->PrivFlags;
+ bestRefresh = refresh;
+ }
+ continue;
+ }
+
+ /*
+ * Clock is in range, so if it is not a programmable clock, find
+ * a matching clock.
+ */
+
+ i = xf86GetNearestClock(scrp, p->Clock, allowDiv2,
+ cp->ClockDivFactor, cp->ClockMulFactor, &k);
+ /*
+ * If the clock is too far from the requested clock, this
+ * mode is no good.
+ */
+ if (k & V_CLKDIV2)
+ gap = abs((p->Clock * 2) -
+ ((scrp->clock[i] * cp->ClockDivFactor) /
+ cp->ClockMulFactor));
+ else
+ gap = abs(p->Clock -
+ ((scrp->clock[i] * cp->ClockDivFactor) /
+ cp->ClockMulFactor));
+ if (gap > minimumGap) {
+ p->status = MODE_NOCLOCK;
+ if (!found)
+ status = MODE_NOCLOCK;
+ continue;
+ }
+ found = TRUE;
+
+ if (strategy == LOOKUP_BEST_REFRESH) {
+ refresh = xf86ModeVRefresh(p);
+ if (p->Flags & V_INTERLACE)
+ refresh /= INTERLACE_REFRESH_WEIGHT;
+ if (refresh > bestRefresh) {
+ bestMode = p;
+ DivFactor = cp->ClockDivFactor;
+ MulFactor = cp->ClockMulFactor;
+ ModePrivFlags = cp->PrivFlags;
+ extraFlags = k;
+ clockIndex = i;
+ bestRefresh = refresh;
+ }
+ continue;
+ }
+ if (strategy == LOOKUP_CLOSEST_CLOCK) {
+ if (gap < minimumGap) {
+ bestMode = p;
+ DivFactor = cp->ClockDivFactor;
+ MulFactor = cp->ClockMulFactor;
+ ModePrivFlags = cp->PrivFlags;
+ extraFlags = k;
+ clockIndex = i;
+ minimumGap = gap;
+ }
+ continue;
+ }
+ /*
+ * If strategy is neither LOOKUP_BEST_REFRESH or
+ * LOOKUP_CLOSEST_CLOCK the required mode has been found.
+ */
+ bestMode = p;
+ DivFactor = cp->ClockDivFactor;
+ MulFactor = cp->ClockMulFactor;
+ ModePrivFlags = cp->PrivFlags;
+ extraFlags = k;
+ clockIndex = i;
+ break;
+ }
+ }
+ if (found) break;
+ }
+ if (!found || bestMode == NULL)
+ return status;
+
+ /* Fill in the mode parameters */
+ if (scrp->progClock) {
+ modep->Clock = bestMode->Clock;
+ modep->ClockIndex = -1;
+ modep->SynthClock = (modep->Clock * MulFactor) / DivFactor;
+ } else {
+ modep->Clock = (scrp->clock[clockIndex] * DivFactor) /
+ MulFactor;
+ modep->ClockIndex = clockIndex;
+ modep->SynthClock = scrp->clock[clockIndex];
+ if (extraFlags & V_CLKDIV2) {
+ modep->Clock /= 2;
+ modep->SynthClock /= 2;
+ }
+ }
+ modep->type = bestMode->type;
+ modep->PrivFlags = ModePrivFlags;
+ modep->HDisplay = bestMode->HDisplay;
+ modep->HSyncStart = bestMode->HSyncStart;
+ modep->HSyncEnd = bestMode->HSyncEnd;
+ modep->HTotal = bestMode->HTotal;
+ modep->HSkew = bestMode->HSkew;
+ modep->VDisplay = bestMode->VDisplay;
+ modep->VSyncStart = bestMode->VSyncStart;
+ modep->VSyncEnd = bestMode->VSyncEnd;
+ modep->VTotal = bestMode->VTotal;
+ modep->VScan = bestMode->VScan;
+ modep->Flags = bestMode->Flags | extraFlags;
+ modep->CrtcHDisplay = bestMode->CrtcHDisplay;
+ modep->CrtcHBlankStart = bestMode->CrtcHBlankStart;
+ modep->CrtcHSyncStart = bestMode->CrtcHSyncStart;
+ modep->CrtcHSyncEnd = bestMode->CrtcHSyncEnd;
+ modep->CrtcHBlankEnd = bestMode->CrtcHBlankEnd;
+ modep->CrtcHTotal = bestMode->CrtcHTotal;
+ modep->CrtcHSkew = bestMode->CrtcHSkew;
+ modep->CrtcVDisplay = bestMode->CrtcVDisplay;
+ modep->CrtcVBlankStart = bestMode->CrtcVBlankStart;
+ modep->CrtcVSyncStart = bestMode->CrtcVSyncStart;
+ modep->CrtcVSyncEnd = bestMode->CrtcVSyncEnd;
+ modep->CrtcVBlankEnd = bestMode->CrtcVBlankEnd;
+ modep->CrtcVTotal = bestMode->CrtcVTotal;
+ modep->CrtcHAdjusted = bestMode->CrtcHAdjusted;
+ modep->CrtcVAdjusted = bestMode->CrtcVAdjusted;
+ modep->HSync = bestMode->HSync;
+ modep->VRefresh = bestMode->VRefresh;
+ modep->Private = bestMode->Private;
+ modep->PrivSize = bestMode->PrivSize;
+
+ bestMode->prev = modep;
+
+ return MODE_OK;
+}
+
+/*
+ * xf86CheckModeForMonitor
+ *
+ * This function takes a mode and monitor description, and determines
+ * if the mode is valid for the monitor.
+ */
+ModeStatus
+xf86CheckModeForMonitor(DisplayModePtr mode, MonPtr monitor)
+{
+ int i;
+
+ /* Sanity checks */
+ if (mode == NULL || monitor == NULL) {
+ ErrorF("xf86CheckModeForMonitor: called with invalid parameters\n");
+ return MODE_ERROR;
+ }
+
+ DebugF("xf86CheckModeForMonitor(%p %s, %p %s)\n",
+ mode, mode->name, monitor, monitor->id);
+
+ /* Some basic mode validity checks */
+ if (0 >= mode->HDisplay || mode->HDisplay > mode->HSyncStart ||
+ mode->HSyncStart >= mode->HSyncEnd || mode->HSyncEnd >= mode->HTotal)
+ return MODE_H_ILLEGAL;
+
+ if (0 >= mode->VDisplay || mode->VDisplay > mode->VSyncStart ||
+ mode->VSyncStart >= mode->VSyncEnd || mode->VSyncEnd >= mode->VTotal)
+ return MODE_V_ILLEGAL;
+
+ if (monitor->nHsync > 0) {
+ /* Check hsync against the allowed ranges */
+ float hsync = xf86ModeHSync(mode);
+ for (i = 0; i < monitor->nHsync; i++)
+ if ((hsync > monitor->hsync[i].lo * (1.0 - SYNC_TOLERANCE)) &&
+ (hsync < monitor->hsync[i].hi * (1.0 + SYNC_TOLERANCE)))
+ break;
+
+ /* Now see whether we ran out of sync ranges without finding a match */
+ if (i == monitor->nHsync)
+ return MODE_HSYNC;
+ }
+
+ if (monitor->nVrefresh > 0) {
+ /* Check vrefresh against the allowed ranges */
+ float vrefrsh = xf86ModeVRefresh(mode);
+ for (i = 0; i < monitor->nVrefresh; i++)
+ if ((vrefrsh > monitor->vrefresh[i].lo * (1.0 - SYNC_TOLERANCE)) &&
+ (vrefrsh < monitor->vrefresh[i].hi * (1.0 + SYNC_TOLERANCE)))
+ break;
+
+ /* Now see whether we ran out of refresh ranges without finding a match */
+ if (i == monitor->nVrefresh)
+ return MODE_VSYNC;
+ }
+
+ /* Force interlaced modes to have an odd VTotal */
+ if (mode->Flags & V_INTERLACE)
+ mode->CrtcVTotal = mode->VTotal |= 1;
+
+ /*
+ * This code stops cvt -r modes, and only cvt -r modes, from hitting 15y+
+ * old CRTs which might, when there is a lot of solar flare activity and
+ * when the celestial bodies are unfavourably aligned, implode trying to
+ * sync to it. It's called "Protecting the user from doing anything stupid".
+ * -- libv
+ */
+
+ if (xf86ModeIsReduced(mode)) {
+ if (!monitor->reducedblanking && !(mode->type & M_T_DRIVER))
+ return MODE_NO_REDUCED;
+ }
+
+ if ((monitor->maxPixClock) && (mode->Clock > monitor->maxPixClock))
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
+}
+
+/*
+ * xf86CheckModeSize
+ *
+ * An internal routine to check if a mode fits in video memory. This tries to
+ * avoid overflows that would otherwise occur when video memory size is greater
+ * than 256MB.
+ */
+static Bool
+xf86CheckModeSize(ScrnInfoPtr scrp, int w, int x, int y)
+{
+ int bpp = scrp->fbFormat.bitsPerPixel,
+ pad = scrp->fbFormat.scanlinePad;
+ int lineWidth, lastWidth;
+
+ if (scrp->depth == 4)
+ pad *= 4; /* 4 planes */
+
+ /* Sanity check */
+ if ((w < 0) || (x < 0) || (y <= 0))
+ return FALSE;
+
+ lineWidth = (((w * bpp) + pad - 1) / pad) * pad;
+ lastWidth = x * bpp;
+
+ /*
+ * At this point, we need to compare
+ *
+ * (lineWidth * (y - 1)) + lastWidth
+ *
+ * against
+ *
+ * scrp->videoRam * (1024 * 8)
+ *
+ * These are bit quantities. To avoid overflows, do the comparison in
+ * terms of BITMAP_SCANLINE_PAD units. This assumes BITMAP_SCANLINE_PAD
+ * is a power of 2. We currently use 32, which limits us to a video
+ * memory size of 8GB.
+ */
+
+ lineWidth = (lineWidth + (BITMAP_SCANLINE_PAD - 1)) / BITMAP_SCANLINE_PAD;
+ lastWidth = (lastWidth + (BITMAP_SCANLINE_PAD - 1)) / BITMAP_SCANLINE_PAD;
+
+ if ((lineWidth * (y - 1) + lastWidth) >
+ (scrp->videoRam * ((1024 * 8) / BITMAP_SCANLINE_PAD)))
+ return FALSE;
+
+ return TRUE;
+}
+
+/*
+ * xf86InitialCheckModeForDriver
+ *
+ * This function checks if a mode satisfies a driver's initial requirements:
+ * - mode size fits within the available pixel area (memory)
+ * - width lies within the range of supported line pitches
+ * - mode size fits within virtual size (if fixed)
+ * - horizontal timings are in range
+ *
+ * This function takes the following parameters:
+ * scrp ScrnInfoPtr
+ * mode mode to check
+ * maxPitch (optional) maximum line pitch
+ * virtualX (optional) virtual width requested
+ * virtualY (optional) virtual height requested
+ *
+ * In addition, the following fields from the ScrnInfoRec are used:
+ * monitor pointer to structure for monitor section
+ * fbFormat pixel format for the framebuffer
+ * videoRam video memory size (in kB)
+ * maxHValue maximum horizontal timing value
+ * maxVValue maximum vertical timing value
+ */
+
+ModeStatus
+xf86InitialCheckModeForDriver(ScrnInfoPtr scrp, DisplayModePtr mode,
+ ClockRangePtr clockRanges,
+ LookupModeFlags strategy,
+ int maxPitch, int virtualX, int virtualY)
+{
+ ClockRangePtr cp;
+ ModeStatus status;
+ Bool allowDiv2 = (strategy & LOOKUP_CLKDIV2) != 0;
+ int i, needDiv2;
+
+ /* Sanity checks */
+ if (!scrp || !mode || !clockRanges) {
+ ErrorF("xf86InitialCheckModeForDriver: "
+ "called with invalid parameters\n");
+ return MODE_ERROR;
+ }
+
+ DebugF("xf86InitialCheckModeForDriver(%p, %p %s, %p, 0x%x, %d, %d, %d)\n",
+ scrp, mode, mode->name , clockRanges, strategy, maxPitch, virtualX, virtualY);
+
+ /* Some basic mode validity checks */
+ if (0 >= mode->HDisplay || mode->HDisplay > mode->HSyncStart ||
+ mode->HSyncStart >= mode->HSyncEnd || mode->HSyncEnd >= mode->HTotal)
+ return MODE_H_ILLEGAL;
+
+ if (0 >= mode->VDisplay || mode->VDisplay > mode->VSyncStart ||
+ mode->VSyncStart >= mode->VSyncEnd || mode->VSyncEnd >= mode->VTotal)
+ return MODE_V_ILLEGAL;
+
+ if (!xf86CheckModeSize(scrp, mode->HDisplay, mode->HDisplay,
+ mode->VDisplay))
+ return MODE_MEM;
+
+ if (maxPitch > 0 && mode->HDisplay > maxPitch)
+ return MODE_BAD_WIDTH;
+
+ if (virtualX > 0 && mode->HDisplay > virtualX)
+ return MODE_VIRTUAL_X;
+
+ if (virtualY > 0 && mode->VDisplay > virtualY)
+ return MODE_VIRTUAL_Y;
+
+ if (scrp->maxHValue > 0 && mode->HTotal > scrp->maxHValue)
+ return MODE_BAD_HVALUE;
+
+ if (scrp->maxVValue > 0 && mode->VTotal > scrp->maxVValue)
+ return MODE_BAD_VVALUE;
+
+ /*
+ * The use of the DisplayModeRec's Crtc* and SynthClock elements below is
+ * provisional, in that they are later reused by the driver at mode-set
+ * time. Here, they are temporarily enlisted to contain the mode timings
+ * as seen by the CRT or panel (rather than the CRTC). The driver's
+ * ValidMode() is allowed to modify these so it can deal with such things
+ * as mode stretching and/or centering. The driver should >NOT< modify the
+ * user-supplied values as these are reported back when mode validation is
+ * said and done.
+ */
+ /*
+ * NOTE: We (ab)use the mode->Crtc* values here to store timing
+ * information for the calculation of Hsync and Vrefresh. Before
+ * these values are calculated the driver is given the opportunity
+ * to either set these HSync and VRefresh itself or modify the timing
+ * values.
+ * The difference to the final calculation is small but imortand:
+ * here we pass the flag INTERLACE_HALVE_V regardless if the driver
+ * sets it or not. This way our calculation of VRefresh has the same
+ * effect as if we do if (flags & V_INTERLACE) refresh *= 2.0
+ * This dual use of the mode->Crtc* values will certainly create
+ * confusion and is bad software design. However since it's part of
+ * the driver API it's hard to change.
+ */
+
+ if (scrp->ValidMode) {
+
+ xf86SetModeCrtc(mode, INTERLACE_HALVE_V);
+
+ cp = xf86FindClockRangeForMode(clockRanges, mode);
+ if (!cp)
+ return MODE_CLOCK_RANGE;
+
+ if (cp->ClockMulFactor < 1)
+ cp->ClockMulFactor = 1;
+ if (cp->ClockDivFactor < 1)
+ cp->ClockDivFactor = 1;
+
+ /*
+ * XXX The effect of clock dividers and multipliers on the monitor's
+ * pixel clock needs to be verified.
+ */
+ if (scrp->progClock) {
+ mode->SynthClock = mode->Clock;
+ } else {
+ i = xf86GetNearestClock(scrp, mode->Clock, allowDiv2,
+ cp->ClockDivFactor, cp->ClockMulFactor,
+ &needDiv2);
+ mode->SynthClock = (scrp->clock[i] * cp->ClockDivFactor) /
+ cp->ClockMulFactor;
+ if (needDiv2 & V_CLKDIV2)
+ mode->SynthClock /= 2;
+ }
+
+ status = (*scrp->ValidMode)(scrp->scrnIndex, mode, FALSE,
+ MODECHECK_INITIAL);
+ if (status != MODE_OK)
+ return status;
+
+ if (mode->HSync <= 0.0)
+ mode->HSync = (float)mode->SynthClock / (float)mode->CrtcHTotal;
+ if (mode->VRefresh <= 0.0)
+ mode->VRefresh = (mode->SynthClock * 1000.0)
+ / (mode->CrtcHTotal * mode->CrtcVTotal);
+ }
+
+ mode->HSync = xf86ModeHSync(mode);
+ mode->VRefresh = xf86ModeVRefresh(mode);
+
+ /* Assume it is OK */
+ return MODE_OK;
+}
+
+/*
+ * xf86CheckModeForDriver
+ *
+ * This function is for checking modes while the server is running (for
+ * use mainly by the VidMode extension).
+ *
+ * This function checks if a mode satisfies a driver's requirements:
+ * - width lies within the line pitch
+ * - mode size fits within virtual size
+ * - horizontal/vertical timings are in range
+ *
+ * This function takes the following parameters:
+ * scrp ScrnInfoPtr
+ * mode mode to check
+ * flags not (currently) used
+ *
+ * In addition, the following fields from the ScrnInfoRec are used:
+ * maxHValue maximum horizontal timing value
+ * maxVValue maximum vertical timing value
+ * virtualX virtual width
+ * virtualY virtual height
+ * clockRanges allowable clock ranges
+ */
+
+ModeStatus
+xf86CheckModeForDriver(ScrnInfoPtr scrp, DisplayModePtr mode, int flags)
+{
+ ClockRangePtr cp;
+ int i, k, gap, minimumGap = CLOCK_TOLERANCE + 1;
+ int extraFlags = 0;
+ int clockIndex = -1;
+ int MulFactor = 1;
+ int DivFactor = 1;
+ int ModePrivFlags = 0;
+ ModeStatus status = MODE_NOMODE;
+
+ /* Some sanity checking */
+ if (scrp == NULL || (!scrp->progClock && scrp->numClocks == 0)) {
+ ErrorF("xf86CheckModeForDriver: called with invalid scrnInfoRec\n");
+ return MODE_ERROR;
+ }
+ if (mode == NULL) {
+ ErrorF("xf86CheckModeForDriver: called with invalid modep\n");
+ return MODE_ERROR;
+ }
+
+ /* Check the mode size */
+ if (mode->HDisplay > scrp->virtualX)
+ return MODE_VIRTUAL_X;
+
+ if (mode->VDisplay > scrp->virtualY)
+ return MODE_VIRTUAL_Y;
+
+ if (scrp->maxHValue > 0 && mode->HTotal > scrp->maxHValue)
+ return MODE_BAD_HVALUE;
+
+ if (scrp->maxVValue > 0 && mode->VTotal > scrp->maxVValue)
+ return MODE_BAD_VVALUE;
+
+ for (cp = scrp->clockRanges; cp != NULL; cp = cp->next) {
+ /* DivFactor and MulFactor must be > 0 */
+ cp->ClockDivFactor = max(1, cp->ClockDivFactor);
+ cp->ClockMulFactor = max(1, cp->ClockMulFactor);
+ }
+
+ if (scrp->progClock) {
+ /* Check clock is in range */
+ for (cp = scrp->clockRanges; cp != NULL; cp = cp->next) {
+ if (modeInClockRange(cp, mode))
+ break;
+ }
+ if (cp == NULL) {
+ return MODE_CLOCK_RANGE;
+ }
+ /*
+ * If programmable clock the required mode has been found
+ */
+ DivFactor = cp->ClockDivFactor;
+ MulFactor = cp->ClockMulFactor;
+ ModePrivFlags = cp->PrivFlags;
+ } else {
+ status = MODE_CLOCK_RANGE;
+ /* Check clock is in range */
+ for (cp = scrp->clockRanges; cp != NULL; cp = cp->next) {
+ if (modeInClockRange(cp, mode)) {
+ /*
+ * Clock is in range, so if it is not a programmable clock,
+ * find a matching clock.
+ */
+
+ i = xf86GetNearestClock(scrp, mode->Clock, 0,
+ cp->ClockDivFactor, cp->ClockMulFactor, &k);
+ /*
+ * If the clock is too far from the requested clock, this
+ * mode is no good.
+ */
+ if (k & V_CLKDIV2)
+ gap = abs((mode->Clock * 2) -
+ ((scrp->clock[i] * cp->ClockDivFactor) /
+ cp->ClockMulFactor));
+ else
+ gap = abs(mode->Clock -
+ ((scrp->clock[i] * cp->ClockDivFactor) /
+ cp->ClockMulFactor));
+ if (gap > minimumGap) {
+ status = MODE_NOCLOCK;
+ continue;
+ }
+
+ DivFactor = cp->ClockDivFactor;
+ MulFactor = cp->ClockMulFactor;
+ ModePrivFlags = cp->PrivFlags;
+ extraFlags = k;
+ clockIndex = i;
+ break;
+ }
+ }
+ if (cp == NULL)
+ return status;
+ }
+
+ /* Fill in the mode parameters */
+ if (scrp->progClock) {
+ mode->ClockIndex = -1;
+ mode->SynthClock = (mode->Clock * MulFactor) / DivFactor;
+ } else {
+ mode->Clock = (scrp->clock[clockIndex] * DivFactor) / MulFactor;
+ mode->ClockIndex = clockIndex;
+ mode->SynthClock = scrp->clock[clockIndex];
+ if (extraFlags & V_CLKDIV2) {
+ mode->Clock /= 2;
+ mode->SynthClock /= 2;
+ }
+ }
+ mode->PrivFlags = ModePrivFlags;
+
+ return MODE_OK;
+}
+
+static int
+inferVirtualSize(ScrnInfoPtr scrp, DisplayModePtr modes, int *vx, int *vy)
+{
+ float aspect = 0.0;
+ MonPtr mon = scrp->monitor;
+ xf86MonPtr DDC;
+ int x = 0, y = 0;
+ DisplayModePtr mode;
+
+ if (!mon) return 0;
+ DDC = mon->DDC;
+
+ if (DDC && DDC->ver.revision >= 4) {
+ /* For 1.4, we might actually get native pixel format. How novel. */
+ if (PREFERRED_TIMING_MODE(DDC->features.msc)) {
+ for (mode = modes; mode; mode = mode->next) {
+ if (mode->type & (M_T_DRIVER | M_T_PREFERRED)) {
+ x = mode->HDisplay;
+ y = mode->VDisplay;
+ goto found;
+ }
+ }
+ }
+ /*
+ * Even if we don't, we might get aspect ratio from extra CVT info
+ * or from the monitor size fields. TODO.
+ */
+ }
+
+ /*
+ * Technically this triggers if either is zero. That wasn't legal
+ * before EDID 1.4, but right now we'll get that wrong. TODO.
+ */
+ if (!aspect) {
+ if (!mon->widthmm || !mon->heightmm)
+ aspect = 4.0/3.0;
+ else
+ aspect = (float)mon->widthmm / (float)mon->heightmm;
+ }
+
+ /* find the largest M_T_DRIVER mode with that aspect ratio */
+ for (mode = modes; mode; mode = mode->next) {
+ float mode_aspect, metaspect;
+ if (!(mode->type & (M_T_DRIVER|M_T_USERDEF)))
+ continue;
+ mode_aspect = (float)mode->HDisplay / (float)mode->VDisplay;
+ metaspect = aspect / mode_aspect;
+ /* 5% slop or so, since we only get size in centimeters */
+ if (fabs(1.0 - metaspect) < 0.05) {
+ if ((mode->HDisplay > x) && (mode->VDisplay > y)) {
+ x = mode->HDisplay;
+ y = mode->VDisplay;
+ }
+ }
+ }
+
+ if (!x || !y) {
+ xf86DrvMsg(scrp->scrnIndex, X_WARNING,
+ "Unable to estimate virtual size\n");
+ return 0;
+ }
+
+found:
+ *vx = x;
+ *vy = y;
+
+ xf86DrvMsg(scrp->scrnIndex, X_INFO,
+ "Estimated virtual size for aspect ratio %.4f is %dx%d\n",
+ aspect, *vx, *vy);
+
+ return 1;
+}
+
+/* Least common multiple */
+static unsigned int
+LCM(unsigned int x, unsigned int y)
+{
+ unsigned int m = x, n = y, o;
+
+ while ((o = m % n))
+ {
+ m = n;
+ n = o;
+ }
+
+ return (x / n) * y;
+}
+
+/*
+ * Given various screen attributes, determine the minimum scanline width such
+ * that each scanline is server and DDX padded and any pixels with imbedded
+ * bank boundaries are off-screen. This function returns -1 if such a width
+ * cannot exist.
+ */
+static int
+scanLineWidth(
+ unsigned int xsize, /* pixels */
+ unsigned int ysize, /* pixels */
+ unsigned int width, /* pixels */
+ unsigned long BankSize, /* char's */
+ PixmapFormatRec *pBankFormat,
+ unsigned int nWidthUnit /* bits */
+)
+{
+ unsigned long nBitsPerBank, nBitsPerScanline, nBitsPerScanlinePadUnit;
+ unsigned long minBitsPerScanline, maxBitsPerScanline;
+
+ /* Sanity checks */
+
+ if (!nWidthUnit || !pBankFormat)
+ return -1;
+
+ nBitsPerBank = BankSize * 8;
+ if (nBitsPerBank % pBankFormat->scanlinePad)
+ return -1;
+
+ if (xsize > width)
+ width = xsize;
+ nBitsPerScanlinePadUnit = LCM(pBankFormat->scanlinePad, nWidthUnit);
+ nBitsPerScanline =
+ (((width * pBankFormat->bitsPerPixel) + nBitsPerScanlinePadUnit - 1) /
+ nBitsPerScanlinePadUnit) * nBitsPerScanlinePadUnit;
+ width = nBitsPerScanline / pBankFormat->bitsPerPixel;
+
+ if (!xsize || !(nBitsPerBank % pBankFormat->bitsPerPixel))
+ return (int)width;
+
+ /*
+ * Scanlines will be server-pad aligned at this point. They will also be
+ * a multiple of nWidthUnit bits long. Ensure that pixels with imbedded
+ * bank boundaries are off-screen.
+ *
+ * It seems reasonable to limit total frame buffer size to 1/16 of the
+ * theoretical maximum address space size. On a machine with 32-bit
+ * addresses (to 8-bit quantities) this turns out to be 256MB. Not only
+ * does this provide a simple limiting condition for the loops below, but
+ * it also prevents unsigned long wraparounds.
+ */
+ if (!ysize)
+ return -1;
+
+ minBitsPerScanline = xsize * pBankFormat->bitsPerPixel;
+ if (minBitsPerScanline > nBitsPerBank)
+ return -1;
+
+ if (ysize == 1)
+ return (int)width;
+
+ maxBitsPerScanline =
+ (((unsigned long)(-1) >> 1) - minBitsPerScanline) / (ysize - 1);
+ while (nBitsPerScanline <= maxBitsPerScanline)
+ {
+ unsigned long BankBase, BankUnit;
+
+ BankUnit = ((nBitsPerBank + nBitsPerScanline - 1) / nBitsPerBank) *
+ nBitsPerBank;
+ if (!(BankUnit % nBitsPerScanline))
+ return (int)width;
+
+ for (BankBase = BankUnit; ; BankBase += nBitsPerBank)
+ {
+ unsigned long x, y;
+
+ y = BankBase / nBitsPerScanline;
+ if (y >= ysize)
+ return (int)width;
+
+ x = BankBase % nBitsPerScanline;
+ if (!(x % pBankFormat->bitsPerPixel))
+ continue;
+
+ if (x < minBitsPerScanline)
+ {
+ /*
+ * Skip ahead certain widths by dividing the excess scanline
+ * amongst the y's.
+ */
+ y *= nBitsPerScanlinePadUnit;
+ nBitsPerScanline +=
+ ((x + y - 1) / y) * nBitsPerScanlinePadUnit;
+ width = nBitsPerScanline / pBankFormat->bitsPerPixel;
+ break;
+ }
+
+ if (BankBase != BankUnit)
+ continue;
+
+ if (!(nBitsPerScanline % x))
+ return (int)width;
+
+ BankBase = ((nBitsPerScanline - minBitsPerScanline) /
+ (nBitsPerScanline - x)) * BankUnit;
+ }
+ }
+
+ return -1;
+}
+
+/*
+ * xf86ValidateModes
+ *
+ * This function takes a set of mode names, modes and limiting conditions,
+ * and selects a set of modes and parameters based on those conditions.
+ *
+ * This function takes the following parameters:
+ * scrp ScrnInfoPtr
+ * availModes the list of modes available for the monitor
+ * modeNames (optional) list of mode names that the screen is requesting
+ * clockRanges a list of clock ranges
+ * linePitches (optional) a list of line pitches
+ * minPitch (optional) minimum line pitch (in pixels)
+ * maxPitch (optional) maximum line pitch (in pixels)
+ * pitchInc (mandatory) pitch increment (in bits)
+ * minHeight (optional) minimum virtual height (in pixels)
+ * maxHeight (optional) maximum virtual height (in pixels)
+ * virtualX (optional) virtual width requested (in pixels)
+ * virtualY (optional) virtual height requested (in pixels)
+ * apertureSize size of video aperture (in bytes)
+ * strategy how to decide which mode to use from multiple modes with
+ * the same name
+ *
+ * In addition, the following fields from the ScrnInfoRec are used:
+ * clocks a list of discrete clocks
+ * numClocks number of discrete clocks
+ * progClock clock is programmable
+ * monitor pointer to structure for monitor section
+ * fbFormat format of the framebuffer
+ * videoRam video memory size
+ * maxHValue maximum horizontal timing value
+ * maxVValue maximum vertical timing value
+ * xInc horizontal timing increment (defaults to 8 pixels)
+ *
+ * The function fills in the following ScrnInfoRec fields:
+ * modePool A subset of the modes available to the monitor which
+ * are compatible with the driver.
+ * modes one mode entry for each of the requested modes, with the
+ * status field filled in to indicate if the mode has been
+ * accepted or not.
+ * virtualX the resulting virtual width
+ * virtualY the resulting virtual height
+ * displayWidth the resulting line pitch
+ *
+ * The function's return value is the number of matching modes found, or -1
+ * if an unrecoverable error was encountered.
+ */
+
+int
+xf86ValidateModes(ScrnInfoPtr scrp, DisplayModePtr availModes,
+ char **modeNames, ClockRangePtr clockRanges,
+ int *linePitches, int minPitch, int maxPitch, int pitchInc,
+ int minHeight, int maxHeight, int virtualX, int virtualY,
+ int apertureSize, LookupModeFlags strategy)
+{
+ DisplayModePtr p, q, r, new, last, *endp;
+ int i, numModes = 0;
+ ModeStatus status;
+ int linePitch = -1, virtX = 0, virtY = 0;
+ int newLinePitch, newVirtX, newVirtY;
+ int modeSize; /* in pixels */
+ Bool validateAllDefaultModes = FALSE;
+ Bool userModes = FALSE;
+ int saveType;
+ PixmapFormatRec *BankFormat;
+ ClockRangePtr cp;
+ ClockRangePtr storeClockRanges;
+ int numTimings = 0;
+ range hsync[MAX_HSYNC];
+ range vrefresh[MAX_VREFRESH];
+ Bool inferred_virtual = FALSE;
+
+ DebugF("xf86ValidateModes(%p, %p, %p, %p,\n\t\t %p, %d, %d, %d, %d, %d, %d, %d, %d, 0x%x)\n",
+ scrp, availModes, modeNames, clockRanges,
+ linePitches, minPitch, maxPitch, pitchInc,
+ minHeight, maxHeight, virtualX, virtualY,
+ apertureSize, strategy
+ );
+
+ /* Some sanity checking */
+ if (scrp == NULL || scrp->name == NULL || !scrp->monitor ||
+ (!scrp->progClock && scrp->numClocks == 0)) {
+ ErrorF("xf86ValidateModes: called with invalid scrnInfoRec\n");
+ return -1;
+ }
+ if (linePitches != NULL && linePitches[0] <= 0) {
+ ErrorF("xf86ValidateModes: called with invalid linePitches\n");
+ return -1;
+ }
+ if (pitchInc <= 0) {
+ ErrorF("xf86ValidateModes: called with invalid pitchInc\n");
+ return -1;
+ }
+ if ((virtualX > 0) != (virtualY > 0)) {
+ ErrorF("xf86ValidateModes: called with invalid virtual resolution\n");
+ return -1;
+ }
+
+ /*
+ * If requested by the driver, allow missing hsync and/or vrefresh ranges
+ * in the monitor section.
+ */
+ if (strategy & LOOKUP_OPTIONAL_TOLERANCES) {
+ strategy &= ~LOOKUP_OPTIONAL_TOLERANCES;
+ } else {
+ const char *type = "";
+ Bool specified = FALSE;
+
+ if (scrp->monitor->nHsync <= 0) {
+ if (numTimings > 0) {
+ scrp->monitor->nHsync = numTimings;
+ for (i = 0; i < numTimings; i++) {
+ scrp->monitor->hsync[i].lo = hsync[i].lo;
+ scrp->monitor->hsync[i].hi = hsync[i].hi;
+ }
+ } else {
+ scrp->monitor->hsync[0].lo = 31.5;
+ scrp->monitor->hsync[0].hi = 48.0;
+ scrp->monitor->nHsync = 1;
+ }
+ type = "default ";
+ } else {
+ specified = TRUE;
+ }
+ for (i = 0; i < scrp->monitor->nHsync; i++) {
+ if (scrp->monitor->hsync[i].lo == scrp->monitor->hsync[i].hi)
+ xf86DrvMsg(scrp->scrnIndex, X_INFO,
+ "%s: Using %shsync value of %.2f kHz\n",
+ scrp->monitor->id, type,
+ scrp->monitor->hsync[i].lo);
+ else
+ xf86DrvMsg(scrp->scrnIndex, X_INFO,
+ "%s: Using %shsync range of %.2f-%.2f kHz\n",
+ scrp->monitor->id, type,
+ scrp->monitor->hsync[i].lo,
+ scrp->monitor->hsync[i].hi);
+ }
+
+ type = "";
+ if (scrp->monitor->nVrefresh <= 0) {
+ if (numTimings > 0) {
+ scrp->monitor->nVrefresh = numTimings;
+ for (i = 0; i < numTimings; i++) {
+ scrp->monitor->vrefresh[i].lo = vrefresh[i].lo;
+ scrp->monitor->vrefresh[i].hi = vrefresh[i].hi;
+ }
+ } else {
+ scrp->monitor->vrefresh[0].lo = 50;
+ scrp->monitor->vrefresh[0].hi = 70;
+ scrp->monitor->nVrefresh = 1;
+ }
+ type = "default ";
+ } else {
+ specified = TRUE;
+ }
+ for (i = 0; i < scrp->monitor->nVrefresh; i++) {
+ if (scrp->monitor->vrefresh[i].lo == scrp->monitor->vrefresh[i].hi)
+ xf86DrvMsg(scrp->scrnIndex, X_INFO,
+ "%s: Using %svrefresh value of %.2f Hz\n",
+ scrp->monitor->id, type,
+ scrp->monitor->vrefresh[i].lo);
+ else
+ xf86DrvMsg(scrp->scrnIndex, X_INFO,
+ "%s: Using %svrefresh range of %.2f-%.2f Hz\n",
+ scrp->monitor->id, type,
+ scrp->monitor->vrefresh[i].lo,
+ scrp->monitor->vrefresh[i].hi);
+ }
+
+ type = "";
+ if (!scrp->monitor->maxPixClock && !specified) {
+ type = "default ";
+ scrp->monitor->maxPixClock = 65000.0;
+ }
+ if (scrp->monitor->maxPixClock) {
+ xf86DrvMsg(scrp->scrnIndex, X_INFO,
+ "%s: Using %smaximum pixel clock of %.2f MHz\n",
+ scrp->monitor->id, type,
+ (float)scrp->monitor->maxPixClock / 1000.0);
+ }
+ }
+
+ /*
+ * Store the clockRanges for later use by the VidMode extension.
+ */
+ storeClockRanges = scrp->clockRanges;
+ while (storeClockRanges != NULL) {
+ storeClockRanges = storeClockRanges->next;
+ }
+ for (cp = clockRanges; cp != NULL; cp = cp->next,
+ storeClockRanges = storeClockRanges->next) {
+ storeClockRanges = xnfalloc(sizeof(ClockRange));
+ if (scrp->clockRanges == NULL)
+ scrp->clockRanges = storeClockRanges;
+ memcpy(storeClockRanges, cp, sizeof(ClockRange));
+ }
+
+ /* Determine which pixmap format to pass to scanLineWidth() */
+ if (scrp->depth > 4)
+ BankFormat = &scrp->fbFormat;
+ else
+ BankFormat = xf86GetPixFormat(scrp, 1); /* >not< scrp->depth! */
+
+ if (scrp->xInc <= 0)
+ scrp->xInc = 8; /* Suitable for VGA and others */
+
+#define _VIRTUALX(x) ((((x) + scrp->xInc - 1) / scrp->xInc) * scrp->xInc)
+
+ /*
+ * Determine maxPitch if it wasn't given explicitly. Note linePitches
+ * always takes precedence if is non-NULL. In that case the minPitch and
+ * maxPitch values passed are ignored.
+ */
+ if (linePitches) {
+ minPitch = maxPitch = linePitches[0];
+ for (i = 1; linePitches[i] > 0; i++) {
+ if (linePitches[i] > maxPitch)
+ maxPitch = linePitches[i];
+ if (linePitches[i] < minPitch)
+ minPitch = linePitches[i];
+ }
+ }
+
+ /* Initial check of virtual size against other constraints */
+ scrp->virtualFrom = X_PROBED;
+ /*
+ * Initialise virtX and virtY if the values are fixed.
+ */
+ if (virtualY > 0) {
+ if (maxHeight > 0 && virtualY > maxHeight) {
+ xf86DrvMsg(scrp->scrnIndex, X_ERROR,
+ "Virtual height (%d) is too large for the hardware "
+ "(max %d)\n", virtualY, maxHeight);
+ return -1;
+ }
+
+ if (minHeight > 0 && virtualY < minHeight) {
+ xf86DrvMsg(scrp->scrnIndex, X_ERROR,
+ "Virtual height (%d) is too small for the hardware "
+ "(min %d)\n", virtualY, minHeight);
+ return -1;
+ }
+
+ virtualX = _VIRTUALX(virtualX);
+ if (linePitches != NULL) {
+ for (i = 0; linePitches[i] != 0; i++) {
+ if ((linePitches[i] >= virtualX) &&
+ (linePitches[i] ==
+ scanLineWidth(virtualX, virtualY, linePitches[i],
+ apertureSize, BankFormat, pitchInc))) {
+ linePitch = linePitches[i];
+ break;
+ }
+ }
+ } else {
+ linePitch = scanLineWidth(virtualX, virtualY, minPitch,
+ apertureSize, BankFormat, pitchInc);
+ }
+
+ if ((linePitch < minPitch) || (linePitch > maxPitch)) {
+ xf86DrvMsg(scrp->scrnIndex, X_ERROR,
+ "Virtual width (%d) is too large for the hardware "
+ "(max %d)\n", virtualX, maxPitch);
+ return -1;
+ }
+
+ if (!xf86CheckModeSize(scrp, linePitch, virtualX, virtualY)) {
+ xf86DrvMsg(scrp->scrnIndex, X_ERROR,
+ "Virtual size (%dx%d) (pitch %d) exceeds video memory\n",
+ virtualX, virtualY, linePitch);
+ return -1;
+ }
+
+ virtX = virtualX;
+ virtY = virtualY;
+ scrp->virtualFrom = X_CONFIG;
+ } else if (!modeNames || !*modeNames) {
+ /* No virtual size given in the config, try to infer */
+ /* XXX this doesn't take m{in,ax}Pitch into account; oh well */
+ inferred_virtual = inferVirtualSize(scrp, availModes, &virtX, &virtY);
+ if (inferred_virtual)
+ linePitch = scanLineWidth(virtX, virtY, minPitch, apertureSize,
+ BankFormat, pitchInc);
+ }
+
+ /* Print clock ranges and scaled clocks */
+ xf86ShowClockRanges(scrp, clockRanges);
+
+ /*
+ * If scrp->modePool hasn't been setup yet, set it up now. This allows the
+ * modes that the driver definitely can't use to be weeded out early. Note
+ * that a modePool mode's prev field is used to hold a pointer to the
+ * member of the scrp->modes list for which a match was considered.
+ */
+ if (scrp->modePool == NULL) {
+ q = NULL;
+ for (p = availModes; p != NULL; p = p->next) {
+ status = xf86InitialCheckModeForDriver(scrp, p, clockRanges,
+ strategy, maxPitch,
+ virtX, virtY);
+
+ if (status == MODE_OK) {
+ status = xf86CheckModeForMonitor(p, scrp->monitor);
+ }
+
+ if (status == MODE_OK) {
+ new = xnfalloc(sizeof(DisplayModeRec));
+ *new = *p;
+ new->next = NULL;
+ if (!q) {
+ scrp->modePool = new;
+ } else {
+ q->next = new;
+ }
+ new->prev = NULL;
+ q = new;
+ q->name = xnfstrdup(p->name);
+ q->status = MODE_OK;
+ } else {
+ printModeRejectMessage(scrp->scrnIndex, p, status);
+ }
+ }
+
+ if (scrp->modePool == NULL) {
+ xf86DrvMsg(scrp->scrnIndex, X_WARNING, "Mode pool is empty\n");
+ return 0;
+ }
+ } else {
+ for (p = scrp->modePool; p != NULL; p = p->next) {
+ p->prev = NULL;
+ p->status = MODE_OK;
+ }
+ }
+
+ /*
+ * Allocate one entry in scrp->modes for each named mode.
+ */
+ while (scrp->modes)
+ xf86DeleteMode(&scrp->modes, scrp->modes);
+ endp = &scrp->modes;
+ last = NULL;
+ if (modeNames != NULL) {
+ for (i = 0; modeNames[i] != NULL; i++) {
+ userModes = TRUE;
+ new = xnfcalloc(1, sizeof(DisplayModeRec));
+ new->prev = last;
+ new->type = M_T_USERDEF;
+ new->name = xnfstrdup(modeNames[i]);
+ if (new->prev)
+ new->prev->next = new;
+ *endp = last = new;
+ endp = &new->next;
+ }
+ }
+
+ /* Lookup each mode */
+#ifdef RANDR
+ if (!xf86Info.disableRandR
+#ifdef PANORAMIX
+ && noPanoramiXExtension
+#endif
+ )
+ validateAllDefaultModes = TRUE;
+#endif
+
+ for (p = scrp->modes; ; p = p->next) {
+ Bool repeat;
+
+ /*
+ * If the supplied mode names don't produce a valid mode, scan through
+ * unconsidered modePool members until one survives validation. This
+ * is done in decreasing order by mode pixel area.
+ */
+
+ if (p == NULL) {
+ if ((numModes > 0) && !validateAllDefaultModes)
+ break;
+
+ validateAllDefaultModes = TRUE;
+ r = NULL;
+ modeSize = 0;
+ for (q = scrp->modePool; q != NULL; q = q->next) {
+ if ((q->prev == NULL) && (q->status == MODE_OK)) {
+ /*
+ * Deal with the case where this mode wasn't considered
+ * because of a builtin mode of the same name.
+ */
+ for (p = scrp->modes; p != NULL; p = p->next) {
+ if ((p->status != MODE_OK) &&
+ !strcmp(p->name, q->name))
+ break;
+ }
+
+ if (p != NULL)
+ q->prev = p;
+ else {
+ /*
+ * A quick check to not allow default modes with
+ * horizontal timing parameters that CRTs may have
+ * problems with.
+ */
+ if (!scrp->monitor->reducedblanking &&
+ (q->type & M_T_DEFAULT) &&
+ ((double)q->HTotal / (double)q->HDisplay) < 1.15)
+ continue;
+
+ if (modeSize < (q->HDisplay * q->VDisplay)) {
+ r = q;
+ modeSize = q->HDisplay * q->VDisplay;
+ }
+ }
+ }
+ }
+
+ if (r == NULL)
+ break;
+
+ p = xnfcalloc(1, sizeof(DisplayModeRec));
+ p->prev = last;
+ p->name = xnfstrdup(r->name);
+ if (!userModes)
+ p->type = M_T_USERDEF;
+ if (p->prev)
+ p->prev->next = p;
+ *endp = last = p;
+ endp = &p->next;
+ }
+
+ repeat = FALSE;
+ lookupNext:
+ if (repeat && ((status = p->status) != MODE_OK))
+ printModeRejectMessage(scrp->scrnIndex, p, status);
+ saveType = p->type;
+ status = xf86LookupMode(scrp, p, clockRanges, strategy);
+ if (repeat && status == MODE_NOMODE)
+ continue;
+ if (status != MODE_OK)
+ printModeRejectMessage(scrp->scrnIndex, p, status);
+ if (status == MODE_ERROR) {
+ ErrorF("xf86ValidateModes: "
+ "unexpected result from xf86LookupMode()\n");
+ return -1;
+ }
+ if (status != MODE_OK) {
+ if (p->status == MODE_OK)
+ p->status = status;
+ continue;
+ }
+ p->type |= saveType;
+ repeat = TRUE;
+
+ newLinePitch = linePitch;
+ newVirtX = virtX;
+ newVirtY = virtY;
+
+ /*
+ * Don't let non-user defined modes increase the virtual size
+ */
+ if (!(p->type & M_T_USERDEF) && (numModes > 0)) {
+ if (p->HDisplay > virtX) {
+ p->status = MODE_VIRTUAL_X;
+ goto lookupNext;
+ }
+ if (p->VDisplay > virtY) {
+ p->status = MODE_VIRTUAL_Y;
+ goto lookupNext;
+ }
+ }
+ /*
+ * Adjust virtual width and height if the mode is too large for the
+ * current values and if they are not fixed.
+ */
+ if (virtualX <= 0 && p->HDisplay > newVirtX)
+ newVirtX = _VIRTUALX(p->HDisplay);
+ if (virtualY <= 0 && p->VDisplay > newVirtY) {
+ if (maxHeight > 0 && p->VDisplay > maxHeight) {
+ p->status = MODE_VIRTUAL_Y; /* ? */
+ goto lookupNext;
+ }
+ newVirtY = p->VDisplay;
+ }
+
+ /*
+ * If virtual resolution is to be increased, revalidate it.
+ */
+ if ((virtX != newVirtX) || (virtY != newVirtY)) {
+ if (linePitches != NULL) {
+ newLinePitch = -1;
+ for (i = 0; linePitches[i] != 0; i++) {
+ if ((linePitches[i] >= newVirtX) &&
+ (linePitches[i] >= linePitch) &&
+ (linePitches[i] ==
+ scanLineWidth(newVirtX, newVirtY, linePitches[i],
+ apertureSize, BankFormat, pitchInc))) {
+ newLinePitch = linePitches[i];
+ break;
+ }
+ }
+ } else {
+ if (linePitch < minPitch)
+ linePitch = minPitch;
+ newLinePitch = scanLineWidth(newVirtX, newVirtY, linePitch,
+ apertureSize, BankFormat,
+ pitchInc);
+ }
+ if ((newLinePitch < minPitch) || (newLinePitch > maxPitch)) {
+ p->status = MODE_BAD_WIDTH;
+ goto lookupNext;
+ }
+
+ /*
+ * Check that the pixel area required by the new virtual height
+ * and line pitch isn't too large.
+ */
+ if (!xf86CheckModeSize(scrp, newLinePitch, newVirtX, newVirtY)) {
+ p->status = MODE_MEM_VIRT;
+ goto lookupNext;
+ }
+ }
+
+ if (scrp->ValidMode) {
+ /*
+ * Give the driver a final say, passing it the proposed virtual
+ * geometry.
+ */
+ scrp->virtualX = newVirtX;
+ scrp->virtualY = newVirtY;
+ scrp->displayWidth = newLinePitch;
+ p->status = (scrp->ValidMode)(scrp->scrnIndex, p, FALSE,
+ MODECHECK_FINAL);
+
+ if (p->status != MODE_OK) {
+ goto lookupNext;
+ }
+ }
+
+ /* Mode has passed all the tests */
+ virtX = newVirtX;
+ virtY = newVirtY;
+ linePitch = newLinePitch;
+ p->status = MODE_OK;
+ numModes++;
+ }
+
+ /*
+ * If we estimated the virtual size above, we may have filtered away all
+ * the modes that maximally match that size; scan again to find out and
+ * fix up if so.
+ */
+ if (inferred_virtual) {
+ int vx = 0, vy = 0;
+ for (p = scrp->modes; p; p = p->next) {
+ if (p->HDisplay > vx && p->VDisplay > vy) {
+ vx = p->HDisplay;
+ vy = p->VDisplay;
+ }
+ }
+ if (vx < virtX || vy < virtY) {
+ const int types[] = {
+ M_T_BUILTIN | M_T_PREFERRED,
+ M_T_BUILTIN,
+ M_T_DRIVER | M_T_PREFERRED,
+ M_T_DRIVER,
+ 0
+ };
+ const int ntypes = sizeof(types) / sizeof(int);
+ int n;
+
+ /*
+ * We did not find the estimated virtual size. So now we want to
+ * find the largest mode available, but we want to search in the
+ * modes in the order of "types" listed above.
+ */
+ for (n = 0; n < ntypes; n++) {
+ int type = types[n];
+
+ vx = 0; vy = 0;
+ for (p = scrp->modes; p; p = p->next) {
+ /* scan through the modes in the sort order above */
+ if ((p->type & type) != type)
+ continue;
+ if (p->HDisplay > vx && p->VDisplay > vy) {
+ vx = p->HDisplay;
+ vy = p->VDisplay;
+ }
+ }
+ if (vx && vy)
+ /* Found one */
+ break;
+ }
+ xf86DrvMsg(scrp->scrnIndex, X_WARNING,
+ "Shrinking virtual size estimate from %dx%d to %dx%d\n",
+ virtX, virtY, vx, vy);
+ virtX = _VIRTUALX(vx);
+ virtY = vy;
+ for (p = scrp->modes; p; p = p->next) {
+ if (numModes > 0) {
+ if (p->HDisplay > virtX)
+ p->status = MODE_VIRTUAL_X;
+ if (p->VDisplay > virtY)
+ p->status = MODE_VIRTUAL_Y;
+ if (p->status != MODE_OK) {
+ numModes--;
+ printModeRejectMessage(scrp->scrnIndex, p, p->status);
+ }
+ }
+ }
+ if (linePitches != NULL) {
+ for (i = 0; linePitches[i] != 0; i++) {
+ if ((linePitches[i] >= virtX) &&
+ (linePitches[i] ==
+ scanLineWidth(virtX, virtY, linePitches[i],
+ apertureSize, BankFormat, pitchInc))) {
+ linePitch = linePitches[i];
+ break;
+ }
+ }
+ } else {
+ linePitch = scanLineWidth(virtX, virtY, minPitch,
+ apertureSize, BankFormat, pitchInc);
+ }
+ }
+ }
+
+ /* Update the ScrnInfoRec parameters */
+
+ scrp->virtualX = virtX;
+ scrp->virtualY = virtY;
+ scrp->displayWidth = linePitch;
+
+ if (numModes <= 0)
+ return 0;
+
+ /* Make the mode list into a circular list by joining up the ends */
+ p = scrp->modes;
+ while (p->next != NULL)
+ p = p->next;
+ /* p is now the last mode on the list */
+ p->next = scrp->modes;
+ scrp->modes->prev = p;
+
+ if (minHeight > 0 && virtY < minHeight) {
+ xf86DrvMsg(scrp->scrnIndex, X_ERROR,
+ "Virtual height (%d) is too small for the hardware "
+ "(min %d)\n", virtY, minHeight);
+ return -1;
+ }
+
+ return numModes;
+}
+
+/*
+ * xf86DeleteMode
+ *
+ * This function removes a mode from a list of modes.
+ *
+ * There are different types of mode lists:
+ *
+ * - singly linked linear lists, ending in NULL
+ * - doubly linked linear lists, starting and ending in NULL
+ * - doubly linked circular lists
+ *
+ */
+
+void
+xf86DeleteMode(DisplayModePtr *modeList, DisplayModePtr mode)
+{
+ /* Catch the easy/insane cases */
+ if (modeList == NULL || *modeList == NULL || mode == NULL)
+ return;
+
+ /* If the mode is at the start of the list, move the start of the list */
+ if (*modeList == mode)
+ *modeList = mode->next;
+
+ /* If mode is the only one on the list, set the list to NULL */
+ if ((mode == mode->prev) && (mode == mode->next)) {
+ *modeList = NULL;
+ } else {
+ if ((mode->prev != NULL) && (mode->prev->next == mode))
+ mode->prev->next = mode->next;
+ if ((mode->next != NULL) && (mode->next->prev == mode))
+ mode->next->prev = mode->prev;
+ }
+
+ free(mode->name);
+ free(mode);
+}
+
+/*
+ * xf86PruneDriverModes
+ *
+ * Remove modes from the driver's mode list which have been marked as
+ * invalid.
+ */
+
+void
+xf86PruneDriverModes(ScrnInfoPtr scrp)
+{
+ DisplayModePtr first, p, n;
+
+ p = scrp->modes;
+ if (p == NULL)
+ return;
+
+ do {
+ if (!(first = scrp->modes))
+ return;
+ n = p->next;
+ if (p->status != MODE_OK) {
+ xf86DeleteMode(&(scrp->modes), p);
+ }
+ p = n;
+ } while (p != NULL && p != first);
+
+ /* modePool is no longer needed, turf it */
+ while (scrp->modePool) {
+ /*
+ * A modePool mode's prev field is used to hold a pointer to the
+ * member of the scrp->modes list for which a match was considered.
+ * Clear that pointer first, otherwise xf86DeleteMode might get
+ * confused
+ */
+ scrp->modePool->prev = NULL;
+ xf86DeleteMode(&scrp->modePool, scrp->modePool);
+ }
+}
+
+
+/*
+ * xf86SetCrtcForModes
+ *
+ * Goes through the screen's mode list, and initialises the Crtc
+ * parameters for each mode. The initialisation includes adjustments
+ * for interlaced and double scan modes.
+ */
+void
+xf86SetCrtcForModes(ScrnInfoPtr scrp, int adjustFlags)
+{
+ DisplayModePtr p;
+
+ /*
+ * Store adjustFlags for use with the VidMode extension. There is an
+ * implicit assumption here that SetCrtcForModes is called once.
+ */
+ scrp->adjustFlags = adjustFlags;
+
+ p = scrp->modes;
+ if (p == NULL)
+ return;
+
+ do {
+ xf86SetModeCrtc(p, adjustFlags);
+ DebugF("%sMode %s: %d (%d) %d %d (%d) %d %d (%d) %d %d (%d) %d\n",
+ (p->type & M_T_DEFAULT) ? "Default " : "",
+ p->name, p->CrtcHDisplay, p->CrtcHBlankStart,
+ p->CrtcHSyncStart, p->CrtcHSyncEnd, p->CrtcHBlankEnd,
+ p->CrtcHTotal, p->CrtcVDisplay, p->CrtcVBlankStart,
+ p->CrtcVSyncStart, p->CrtcVSyncEnd, p->CrtcVBlankEnd,
+ p->CrtcVTotal);
+ p = p->next;
+ } while (p != NULL && p != scrp->modes);
+}
+
+void
+xf86PrintModes(ScrnInfoPtr scrp)
+{
+ DisplayModePtr p;
+ float hsync, refresh = 0;
+ const char *desc, *desc2, *prefix, *uprefix;
+
+ if (scrp == NULL)
+ return;
+
+ xf86DrvMsg(scrp->scrnIndex, scrp->virtualFrom, "Virtual size is %dx%d "
+ "(pitch %d)\n", scrp->virtualX, scrp->virtualY,
+ scrp->displayWidth);
+
+ p = scrp->modes;
+ if (p == NULL)
+ return;
+
+ do {
+ desc = desc2 = "";
+ hsync = xf86ModeHSync(p);
+ refresh = xf86ModeVRefresh(p);
+ if (p->Flags & V_INTERLACE) {
+ desc = " (I)";
+ }
+ if (p->Flags & V_DBLSCAN) {
+ desc = " (D)";
+ }
+ if (p->VScan > 1) {
+ desc2 = " (VScan)";
+ }
+ if (p->type & M_T_BUILTIN)
+ prefix = "Built-in mode";
+ else if (p->type & M_T_DEFAULT)
+ prefix = "Default mode";
+ else if (p->type & M_T_DRIVER)
+ prefix = "Driver mode";
+ else
+ prefix = "Mode";
+ if (p->type & M_T_USERDEF)
+ uprefix = "*";
+ else
+ uprefix = " ";
+ if (hsync == 0 || refresh == 0) {
+ if (p->name)
+ xf86DrvMsg(scrp->scrnIndex, X_CONFIG,
+ "%s%s \"%s\"\n", uprefix, prefix, p->name);
+ else
+ xf86DrvMsg(scrp->scrnIndex, X_PROBED,
+ "%s%s %dx%d (unnamed)\n",
+ uprefix, prefix, p->HDisplay, p->VDisplay);
+ } else if (p->Clock == p->SynthClock) {
+ xf86DrvMsg(scrp->scrnIndex, X_CONFIG,
+ "%s%s \"%s\": %.1f MHz, %.1f kHz, %.1f Hz%s%s\n",
+ uprefix, prefix, p->name, p->Clock / 1000.0,
+ hsync, refresh, desc, desc2);
+ } else {
+ xf86DrvMsg(scrp->scrnIndex, X_CONFIG,
+ "%s%s \"%s\": %.1f MHz (scaled from %.1f MHz), "
+ "%.1f kHz, %.1f Hz%s%s\n",
+ uprefix, prefix, p->name, p->Clock / 1000.0,
+ p->SynthClock / 1000.0, hsync, refresh, desc, desc2);
+ }
+ if (hsync != 0 && refresh != 0)
+ xf86PrintModeline(scrp->scrnIndex,p);
+ p = p->next;
+ } while (p != NULL && p != scrp->modes);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-28 20:25:40 +0000