diff options
Diffstat (limited to 'xorg-server/hw/xfree86/common/xf86Mode.c')
| -rw-r--r-- | xorg-server/hw/xfree86/common/xf86Mode.c | 2022 |
1 files changed, 2022 insertions, 0 deletions
diff --git a/xorg-server/hw/xfree86/common/xf86Mode.c b/xorg-server/hw/xfree86/common/xf86Mode.c new file mode 100644 index 000000000..c1b0a5fc9 --- /dev/null +++ b/xorg-server/hw/xfree86/common/xf86Mode.c @@ -0,0 +1,2022 @@ +/* + * 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). + */ + +/* + * 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 "os.h" +#include "servermd.h" +#include "mibank.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. + */ +_X_EXPORT 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 + */ + +_X_EXPORT 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 + */ +_X_EXPORT 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"); + } + } +} + + +/* + * xf86FindClockRangeForMode() [... like the name says ...] + */ +static ClockRangePtr +xf86FindClockRangeForMode(ClockRangePtr clockRanges, DisplayModePtr p) +{ + ClockRangePtr cp; + + for (cp = clockRanges; ; cp = cp->next) + if (!cp || + ((p->Clock >= cp->minClock) && + (p->Clock <= cp->maxClock) && + (cp->interlaceAllowed || !(p->Flags & V_INTERLACE)) && + (cp->doubleScanAllowed || + ((p->VScan <= 1) && !(p->Flags & V_DBLSCAN))))) + 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. + */ + +_X_EXPORT 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. + */ +_X_EXPORT 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; + } + +#ifdef DEBUG + ErrorF("xf86CheckModeForMonitor(%p %s, %p %s)\n", + mode, mode->name, monitor, monitor->id); +#endif + + /* 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 + */ + + /* Is the horizontal blanking a bit lowish? */ + if (((mode->HDisplay * 5 / 4) & ~0x07) > mode->HTotal) { + /* is this a cvt -r mode, and only a cvt -r mode? */ + if (((mode->HTotal - mode->HDisplay) == 160) && + ((mode->HSyncEnd - mode->HDisplay) == 80) && + ((mode->HSyncEnd - mode->HSyncStart) == 32) && + ((mode->VSyncStart - mode->VDisplay) == 3)) { + 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 + */ + +_X_EXPORT 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; + } + +#ifdef DEBUG + ErrorF("xf86InitialCheckModeForDriver(%p, %p %s, %p, 0x%x, %d, %d, %d)\n", + scrp, mode, mode->name , clockRanges, strategy, maxPitch, virtualX, virtualY); +#endif + + /* 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 + */ + +_X_EXPORT ModeStatus +xf86CheckModeForDriver(ScrnInfoPtr scrp, DisplayModePtr mode, int flags) +{ + ClockRangesPtr cp; + int i, k, gap, minimumGap = CLOCK_TOLERANCE + 1; + int extraFlags = 0; + int clockIndex = -1; + int MulFactor = 1; + int DivFactor = 1; + int ModePrivFlags = 0; + Bool allowDiv2; + 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 ((cp->minClock <= mode->Clock) && + (cp->maxClock >= mode->Clock) && + (cp->interlaceAllowed || !(mode->Flags & V_INTERLACE)) && + (cp->doubleScanAllowed || + ((!(mode->Flags & V_DBLSCAN)) && (mode->VScan <= 1)))) + 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 ((cp->minClock <= mode->Clock) && + (cp->maxClock >= mode->Clock) && + (cp->interlaceAllowed || !(mode->Flags & V_INTERLACE)) && + (cp->doubleScanAllowed || + ((!(mode->Flags & V_DBLSCAN)) && (mode->VScan <= 1)))) { + + /* + * Clock is in range, so if it is not a programmable clock, + * find a matching clock. + */ + + allowDiv2 = (cp->strategy & LOOKUP_CLKDIV2) != 0; + i = xf86GetNearestClock(scrp, mode->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((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; +} + +/* + * 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. + */ + +_X_EXPORT 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; + ClockRangesPtr storeClockRanges; + double targetRefresh = 0.0; + int numTimings = 0; + range hsync[MAX_HSYNC]; + range vrefresh[MAX_VREFRESH]; + Bool inferred_virtual = FALSE; + +#ifdef DEBUG + ErrorF("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 + ); +#endif + + /* 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 = ""; + + 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 = 37.9; + scrp->monitor->nHsync = 1; + } + type = "default "; + } + 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 "; + } + 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); + } + if (scrp->monitor->maxPixClock) { + xf86DrvMsg(scrp->scrnIndex, X_INFO, + "%s: Using maximum pixel clock of %.2f MHz\n", + scrp->monitor->id, + (float)scrp->monitor->maxPixClock / 1000.0); + } + } + + /* + * Store the clockRanges for later use by the VidMode extension. Must + * also store the strategy, since ClockDiv2 flag is stored there. + */ + storeClockRanges = scrp->clockRanges; + while (storeClockRanges != NULL) { + storeClockRanges = storeClockRanges->next; + } + for (cp = clockRanges; cp != NULL; cp = cp->next, + storeClockRanges = storeClockRanges->next) { + storeClockRanges = xnfalloc(sizeof(ClockRanges)); + if (scrp->clockRanges == NULL) + scrp->clockRanges = storeClockRanges; + memcpy(storeClockRanges, cp, sizeof(ClockRange)); + storeClockRanges->strategy = strategy; + } + + /* Determine which pixmap format to pass to miScanLineWidth() */ + 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] == + miScanLineWidth(virtualX, virtualY, linePitches[i], + apertureSize, BankFormat, pitchInc))) { + linePitch = linePitches[i]; + break; + } + } + } else { + linePitch = miScanLineWidth(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 = miScanLineWidth(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; + } + } + + /* + * Go through the mode pool and see if any modes match the target + * refresh rate, (if specified). If no modes match, abandon the target. + */ + targetRefresh = xf86SetRealOption(scrp->options, + "TargetRefresh", 0.0); + if (targetRefresh > 0.0) { + for (p = scrp->modePool; p != NULL; p = p->next) { + if (xf86ModeVRefresh(p) > targetRefresh * (1.0 - SYNC_TOLERANCE)) + break; + } + if (!p) + targetRefresh = 0.0; + } + + if (targetRefresh > 0.0) { + xf86DrvMsg(scrp->scrnIndex, X_CONFIG, + "Target refresh rate is %.1f Hz\n", targetRefresh); + } + + /* + * 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 = xnfalloc(strlen(modeNames[i]) + 1); + strcpy(new->name, 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 there is a target refresh rate, skip modes that + * don't match up. + */ + if (xf86ModeVRefresh(q) < + (1.0 - SYNC_TOLERANCE) * targetRefresh) + 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 = xnfalloc(strlen(r->name) + 1); + if (!userModes) + p->type = M_T_USERDEF; + strcpy(p->name, r->name); + 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] == + miScanLineWidth(newVirtX, newVirtY, linePitches[i], + apertureSize, BankFormat, pitchInc))) { + newLinePitch = linePitches[i]; + break; + } + } + } else { + if (linePitch < minPitch) + linePitch = minPitch; + newLinePitch = miScanLineWidth(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++; + } + +#undef _VIRTUALX + + /* + * 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) { + xf86DrvMsg(scrp->scrnIndex, X_WARNING, + "Shrinking virtual size estimate from %dx%d to %dx%d\n", + virtX, virtY, vx, vy); + virtX = vx; + virtY = vy; + linePitch = miScanLineWidth(vx, vy, 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 + * + */ + +_X_EXPORT 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; + } + + xfree(mode->name); + xfree(mode); +} + +/* + * xf86PruneDriverModes + * + * Remove modes from the driver's mode list which have been marked as + * invalid. + */ + +_X_EXPORT 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. + */ +_X_EXPORT 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); +#ifdef DEBUG + ErrorF("%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); +#endif + p = p->next; + } while (p != NULL && p != scrp->modes); +} + + +#if 0 +static void +add(char **p, char *new) +{ + *p = xnfrealloc(*p, strlen(*p) + strlen(new) + 2); + strcat(*p, " "); + strcat(*p, new); +} + +_X_EXPORT void +xf86PrintModeline(int scrnIndex,DisplayModePtr mode) +{ + char tmp[256]; + char *flags = xnfcalloc(1, 1); + + if (mode->HSkew) { + snprintf(tmp, 256, "hskew %i", mode->HSkew); + add(&flags, tmp); + } + if (mode->VScan) { + snprintf(tmp, 256, "vscan %i", mode->VScan); + add(&flags, tmp); + } + if (mode->Flags & V_INTERLACE) add(&flags, "interlace"); + if (mode->Flags & V_CSYNC) add(&flags, "composite"); + if (mode->Flags & V_DBLSCAN) add(&flags, "doublescan"); + if (mode->Flags & V_BCAST) add(&flags, "bcast"); + if (mode->Flags & V_PHSYNC) add(&flags, "+hsync"); + if (mode->Flags & V_NHSYNC) add(&flags, "-hsync"); + if (mode->Flags & V_PVSYNC) add(&flags, "+vsync"); + if (mode->Flags & V_NVSYNC) add(&flags, "-vsync"); + if (mode->Flags & V_PCSYNC) add(&flags, "+csync"); + if (mode->Flags & V_NCSYNC) add(&flags, "-csync"); +#if 0 + if (mode->Flags & V_CLKDIV2) add(&flags, "vclk/2"); +#endif + xf86DrvMsgVerb(scrnIndex, X_INFO, 3, + "Modeline \"%s\" %6.2f %i %i %i %i %i %i %i %i%s\n", + mode->name, mode->Clock/1000., mode->HDisplay, + mode->HSyncStart, mode->HSyncEnd, mode->HTotal, + mode->VDisplay, mode->VSyncStart, mode->VSyncEnd, + mode->VTotal, flags); + xfree(flags); +} +#endif + +_X_EXPORT 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); +} + +#if 0 +/** + * Adds the new mode into the mode list, and returns the new list + * + * \param modes doubly-linked mode list. + */ +_X_EXPORT DisplayModePtr +xf86ModesAdd(DisplayModePtr modes, DisplayModePtr new) +{ + if (modes == NULL) + return new; + + if (new) { + DisplayModePtr mode = modes; + + while (mode->next) + mode = mode->next; + + mode->next = new; + new->prev = mode; + } + + return modes; +} +#endif |