xf86Crtc.c 53.7 KB
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/*
 * Copyright © 2006 Keith Packard
 *
 * 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 the copyright holders not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  The copyright holders make no representations
 * about the suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS 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.
 */

#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
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#else
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
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#endif

#include <stddef.h>
#include <string.h>
#include <stdio.h>

#include "xf86.h"
#include "xf86DDC.h"
#include "xf86Crtc.h"
#include "xf86Modes.h"
#include "xf86RandR12.h"
#include "X11/extensions/render.h"
#define DPMS_SERVER
#include "X11/extensions/dpms.h"
#include "X11/Xatom.h"
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#ifdef RENDER
#include "picturestr.h"
#endif
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/*
 * Initialize xf86CrtcConfig structure
 */

int xf86CrtcConfigPrivateIndex = -1;

void
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xf86CrtcConfigInit (ScrnInfoPtr scrn,
		    const xf86CrtcConfigFuncsRec *funcs)
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{
    xf86CrtcConfigPtr	config;
    
    if (xf86CrtcConfigPrivateIndex == -1)
	xf86CrtcConfigPrivateIndex = xf86AllocateScrnInfoPrivateIndex();
    config = xnfcalloc (1, sizeof (xf86CrtcConfigRec));
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    config->funcs = funcs;

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    scrn->privates[xf86CrtcConfigPrivateIndex].ptr = config;
}
 
void
xf86CrtcSetSizeRange (ScrnInfoPtr scrn,
		      int minWidth, int minHeight,
		      int maxWidth, int maxHeight)
{
    xf86CrtcConfigPtr	config = XF86_CRTC_CONFIG_PTR(scrn);

    config->minWidth = minWidth;
    config->minHeight = minHeight;
    config->maxWidth = maxWidth;
    config->maxHeight = maxHeight;
}

/*
 * Crtc functions
 */
xf86CrtcPtr
xf86CrtcCreate (ScrnInfoPtr		scrn,
		const xf86CrtcFuncsRec	*funcs)
{
    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
    xf86CrtcPtr		crtc, *crtcs;

    crtc = xcalloc (sizeof (xf86CrtcRec), 1);
    if (!crtc)
	return NULL;
    crtc->scrn = scrn;
    crtc->funcs = funcs;
#ifdef RANDR_12_INTERFACE
    crtc->randr_crtc = NULL;
#endif
    crtc->rotation = RR_Rotate_0;
    crtc->desiredRotation = RR_Rotate_0;
    if (xf86_config->crtc)
	crtcs = xrealloc (xf86_config->crtc,
			  (xf86_config->num_crtc + 1) * sizeof (xf86CrtcPtr));
    else
	crtcs = xalloc ((xf86_config->num_crtc + 1) * sizeof (xf86CrtcPtr));
    if (!crtcs)
    {
	xfree (crtc);
	return NULL;
    }
    xf86_config->crtc = crtcs;
    xf86_config->crtc[xf86_config->num_crtc++] = crtc;
    return crtc;
}

void
xf86CrtcDestroy (xf86CrtcPtr crtc)
{
    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(crtc->scrn);
    int			c;
    
    (*crtc->funcs->destroy) (crtc);
    for (c = 0; c < xf86_config->num_crtc; c++)
	if (xf86_config->crtc[c] == crtc)
	{
	    memmove (&xf86_config->crtc[c],
		     &xf86_config->crtc[c+1],
		     xf86_config->num_crtc - (c + 1));
	    xf86_config->num_crtc--;
	    break;
	}
    xfree (crtc);
}


/**
 * Return whether any outputs are connected to the specified pipe
 */

Bool
xf86CrtcInUse (xf86CrtcPtr crtc)
{
    ScrnInfoPtr		pScrn = crtc->scrn;
    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
    int			o;
    
    for (o = 0; o < xf86_config->num_output; o++)
	if (xf86_config->output[o]->crtc == crtc)
	    return TRUE;
    return FALSE;
}

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void
xf86CrtcSetScreenSubpixelOrder (ScreenPtr pScreen)
{
#ifdef RENDER
    int			subpixel_order = SubPixelUnknown;
    Bool		has_none = FALSE;
    ScrnInfoPtr		scrn = xf86Screens[pScreen->myNum];
    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
    int			c, o;

    for (c = 0; c < xf86_config->num_crtc; c++)
    {
	xf86CrtcPtr crtc = xf86_config->crtc[c];
	
	for (o = 0; o < xf86_config->num_output; o++)
	{
	    xf86OutputPtr   output = xf86_config->output[o];

	    if (output->crtc == crtc)
	    {
		switch (output->subpixel_order) {
		case SubPixelNone:
		    has_none = TRUE;
		    break;
		case SubPixelUnknown:
		    break;
		default:
		    subpixel_order = output->subpixel_order;
		    break;
		}
	    }
	    if (subpixel_order != SubPixelUnknown)
		break;
	}
	if (subpixel_order != SubPixelUnknown)
	{
	    static const int circle[4] = {
		SubPixelHorizontalRGB,
		SubPixelVerticalRGB,
		SubPixelHorizontalBGR,
		SubPixelVerticalBGR,
	    };
	    int	rotate;
	    int c;
	    for (rotate = 0; rotate < 4; rotate++)
		if (crtc->rotation & (1 << rotate))
		    break;
	    for (c = 0; c < 4; c++)
		if (circle[c] == subpixel_order)
		    break;
	    c = (c + rotate) & 0x3;
	    if ((crtc->rotation & RR_Reflect_X) && !(c & 1))
		c ^= 2;
	    if ((crtc->rotation & RR_Reflect_Y) && (c & 1))
		c ^= 2;
	    subpixel_order = circle[c];
	    break;
	}
    }
    if (subpixel_order == SubPixelUnknown && has_none)
	subpixel_order = SubPixelNone;
    PictureSetSubpixelOrder (pScreen, subpixel_order);
#endif
}

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/**
 * Sets the given video mode on the given crtc
 */
Bool
xf86CrtcSetMode (xf86CrtcPtr crtc, DisplayModePtr mode, Rotation rotation,
		 int x, int y)
{
    ScrnInfoPtr		scrn = crtc->scrn;
    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
    int			i;
    Bool		ret = FALSE;
    Bool		didLock = FALSE;
    DisplayModePtr	adjusted_mode;
    DisplayModeRec	saved_mode;
    int			saved_x, saved_y;
    Rotation		saved_rotation;

    crtc->enabled = xf86CrtcInUse (crtc);
    
    if (!crtc->enabled)
    {
	/* XXX disable crtc? */
	return TRUE;
    }

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    adjusted_mode = xf86DuplicateMode(mode);

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    didLock = crtc->funcs->lock (crtc);

    saved_mode = crtc->mode;
    saved_x = crtc->x;
    saved_y = crtc->y;
    saved_rotation = crtc->rotation;
    /* Update crtc values up front so the driver can rely on them for mode
     * setting.
     */
    crtc->mode = *mode;
    crtc->x = x;
    crtc->y = y;
    crtc->rotation = rotation;

    /* XXX short-circuit changes to base location only */
    
    /* Pass our mode to the outputs and the CRTC to give them a chance to
     * adjust it according to limitations or output properties, and also
     * a chance to reject the mode entirely.
     */
    for (i = 0; i < xf86_config->num_output; i++) {
	xf86OutputPtr output = xf86_config->output[i];

	if (output->crtc != crtc)
	    continue;

	if (!output->funcs->mode_fixup(output, mode, adjusted_mode)) {
	    goto done;
	}
    }

    if (!crtc->funcs->mode_fixup(crtc, mode, adjusted_mode)) {
	goto done;
    }

    if (!xf86CrtcRotate (crtc, mode, rotation)) {
	goto done;
    }

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    /* Prepare the outputs and CRTCs before setting the mode. */
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    for (i = 0; i < xf86_config->num_output; i++) {
	xf86OutputPtr output = xf86_config->output[i];

	if (output->crtc != crtc)
	    continue;

	/* Disable the output as the first thing we do. */
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	output->funcs->prepare(output);
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    }

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    crtc->funcs->prepare(crtc);
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    /* Set up the DPLL and any output state that needs to adjust or depend
     * on the DPLL.
     */
    crtc->funcs->mode_set(crtc, mode, adjusted_mode, x, y);
    for (i = 0; i < xf86_config->num_output; i++) 
    {
	xf86OutputPtr output = xf86_config->output[i];
	if (output->crtc == crtc)
	    output->funcs->mode_set(output, mode, adjusted_mode);
    }

    /* Now, enable the clocks, plane, pipe, and outputs that we set up. */
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    crtc->funcs->commit(crtc);
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    for (i = 0; i < xf86_config->num_output; i++) 
    {
	xf86OutputPtr output = xf86_config->output[i];
	if (output->crtc == crtc)
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	{
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	    output->funcs->commit(output);
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#ifdef RANDR_12_INTERFACE
	    if (output->randr_output)
		RRPostPendingProperties (output->randr_output);
#endif
	}
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    }

    /* XXX free adjustedmode */
    ret = TRUE;
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    if (scrn->pScreen)
	xf86CrtcSetScreenSubpixelOrder (scrn->pScreen);
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done:
    if (!ret) {
	crtc->x = saved_x;
	crtc->y = saved_y;
	crtc->rotation = saved_rotation;
	crtc->mode = saved_mode;
    }

    if (didLock)
	crtc->funcs->unlock (crtc);

    return ret;
}

/*
 * Output functions
 */

extern XF86ConfigPtr xf86configptr;

typedef enum {
    OPTION_PREFERRED_MODE,
    OPTION_POSITION,
    OPTION_BELOW,
    OPTION_RIGHT_OF,
    OPTION_ABOVE,
    OPTION_LEFT_OF,
    OPTION_ENABLE,
    OPTION_DISABLE,
    OPTION_MIN_CLOCK,
    OPTION_MAX_CLOCK,
    OPTION_IGNORE,
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    OPTION_ROTATE,
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} OutputOpts;

static OptionInfoRec xf86OutputOptions[] = {
    {OPTION_PREFERRED_MODE, "PreferredMode",	OPTV_STRING,  {0}, FALSE },
    {OPTION_POSITION,	    "Position",		OPTV_STRING,  {0}, FALSE },
    {OPTION_BELOW,	    "Below",		OPTV_STRING,  {0}, FALSE },
    {OPTION_RIGHT_OF,	    "RightOf",		OPTV_STRING,  {0}, FALSE },
    {OPTION_ABOVE,	    "Above",		OPTV_STRING,  {0}, FALSE },
    {OPTION_LEFT_OF,	    "LeftOf",		OPTV_STRING,  {0}, FALSE },
    {OPTION_ENABLE,	    "Enable",		OPTV_BOOLEAN, {0}, FALSE },
    {OPTION_DISABLE,	    "Disable",		OPTV_BOOLEAN, {0}, FALSE },
    {OPTION_MIN_CLOCK,	    "MinClock",		OPTV_FREQ,    {0}, FALSE },
    {OPTION_MAX_CLOCK,	    "MaxClock",		OPTV_FREQ,    {0}, FALSE },
    {OPTION_IGNORE,	    "Ignore",		OPTV_BOOLEAN, {0}, FALSE },
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    {OPTION_ROTATE,	    "Rotate",		OPTV_STRING,  {0}, FALSE },
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    {-1,		    NULL,		OPTV_NONE,    {0}, FALSE },
};

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enum {
    OPTION_MODEDEBUG,
};

static OptionInfoRec xf86DeviceOptions[] = {
    {OPTION_MODEDEBUG,	    "ModeDebug",	OPTV_STRING,  {0}, FALSE },
    {-1,		    NULL,		OPTV_NONE,    {0}, FALSE },
};

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static void
xf86OutputSetMonitor (xf86OutputPtr output)
{
    char    *option_name;
    static const char monitor_prefix[] = "monitor-";
    char    *monitor;

    if (!output->name)
	return;

    if (output->options)
	xfree (output->options);

    output->options = xnfalloc (sizeof (xf86OutputOptions));
    memcpy (output->options, xf86OutputOptions, sizeof (xf86OutputOptions));
    
    option_name = xnfalloc (strlen (monitor_prefix) +
			    strlen (output->name) + 1);
    strcpy (option_name, monitor_prefix);
    strcat (option_name, output->name);
    monitor = xf86findOptionValue (output->scrn->options, option_name);
    if (!monitor)
	monitor = output->name;
    else
	xf86MarkOptionUsedByName (output->scrn->options, option_name);
    xfree (option_name);
    output->conf_monitor = xf86findMonitor (monitor,
					    xf86configptr->conf_monitor_lst);
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    /*
     * Find the monitor section of the screen and use that
     */
    if (!output->conf_monitor && output->use_screen_monitor)
	output->conf_monitor = xf86findMonitor (output->scrn->monitor->id,
						xf86configptr->conf_monitor_lst);
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    if (output->conf_monitor)
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    {
	xf86DrvMsg (output->scrn->scrnIndex, X_INFO,
		    "Output %s using monitor section %s\n",
		    output->name, output->conf_monitor->mon_identifier);
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	xf86ProcessOptions (output->scrn->scrnIndex,
			    output->conf_monitor->mon_option_lst,
			    output->options);
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    }
    else
	xf86DrvMsg (output->scrn->scrnIndex, X_INFO,
		    "Output %s has no monitor section\n",
		    output->name);
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}

static Bool
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xf86OutputEnabled (xf86OutputPtr output)
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{
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    Bool    enable, disable;

    /* check to see if this output was enabled in the config file */
    if (xf86GetOptValBool (output->options, OPTION_ENABLE, &enable) && enable)
    {
	xf86DrvMsg (output->scrn->scrnIndex, X_INFO,
		    "Output %s enabled by config file\n", output->name);
	return TRUE;
    }
    /* or if this output was disabled in the config file */
    if (xf86GetOptValBool (output->options, OPTION_DISABLE, &disable) && disable)
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    {
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	xf86DrvMsg (output->scrn->scrnIndex, X_INFO,
		    "Output %s disabled by config file\n", output->name);
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	return FALSE;
    }
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    /* otherwise, enable if it is not disconnected */
    enable = output->status != XF86OutputStatusDisconnected;
    xf86DrvMsg (output->scrn->scrnIndex, X_INFO,
    	    "Output %s %sconnected\n", output->name, enable ? "" : "dis");
    return enable;
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}

static Bool
xf86OutputIgnored (xf86OutputPtr    output)
{
    return xf86ReturnOptValBool (output->options, OPTION_IGNORE, FALSE);
}

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static char *direction[4] = {
    "normal", 
    "left", 
    "inverted", 
    "right"
};

static Rotation
xf86OutputInitialRotation (xf86OutputPtr output)
{
    char    *rotate_name = xf86GetOptValString (output->options, 
						OPTION_ROTATE);
    int	    i;

    if (!rotate_name)
	return RR_Rotate_0;
    
    for (i = 0; i < 4; i++)
	if (xf86nameCompare (direction[i], rotate_name) == 0)
	    return (1 << i);
    return RR_Rotate_0;
}

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xf86OutputPtr
xf86OutputCreate (ScrnInfoPtr		    scrn,
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		  const xf86OutputFuncsRec  *funcs,
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		  const char		    *name)
{
    xf86OutputPtr	output, *outputs;
    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
    int			len;

    if (name)
	len = strlen (name) + 1;
    else
	len = 0;

    output = xcalloc (sizeof (xf86OutputRec) + len, 1);
    if (!output)
	return NULL;
    output->scrn = scrn;
    output->funcs = funcs;
    if (name)
    {
	output->name = (char *) (output + 1);
	strcpy (output->name, name);
    }
    output->subpixel_order = SubPixelUnknown;
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    /*
     * Use the old per-screen monitor section for the first output
     */
    output->use_screen_monitor = (xf86_config->num_output == 0);
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#ifdef RANDR_12_INTERFACE
    output->randr_output = NULL;
#endif
    if (name)
    {
	xf86OutputSetMonitor (output);
	if (xf86OutputIgnored (output))
	{
	    xfree (output);
	    return FALSE;
	}
    }
    
    
    if (xf86_config->output)
	outputs = xrealloc (xf86_config->output,
			  (xf86_config->num_output + 1) * sizeof (xf86OutputPtr));
    else
	outputs = xalloc ((xf86_config->num_output + 1) * sizeof (xf86OutputPtr));
    if (!outputs)
    {
	xfree (output);
	return NULL;
    }
    
    xf86_config->output = outputs;
    xf86_config->output[xf86_config->num_output++] = output;
    
    return output;
}

Bool
xf86OutputRename (xf86OutputPtr output, const char *name)
{
    int	    len = strlen(name) + 1;
    char    *newname = xalloc (len);
    
    if (!newname)
	return FALSE;	/* so sorry... */
    
    strcpy (newname, name);
    if (output->name && output->name != (char *) (output + 1))
	xfree (output->name);
    output->name = newname;
    xf86OutputSetMonitor (output);
    if (xf86OutputIgnored (output))
	return FALSE;
    return TRUE;
}

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void
xf86OutputUseScreenMonitor (xf86OutputPtr output, Bool use_screen_monitor)
{
    if (use_screen_monitor != output->use_screen_monitor)
    {
	output->use_screen_monitor = use_screen_monitor;
	xf86OutputSetMonitor (output);
    }
}

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void
xf86OutputDestroy (xf86OutputPtr output)
{
    ScrnInfoPtr		scrn = output->scrn;
    xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
    int			o;
    
    (*output->funcs->destroy) (output);
    while (output->probed_modes)
	xf86DeleteMode (&output->probed_modes, output->probed_modes);
    for (o = 0; o < xf86_config->num_output; o++)
	if (xf86_config->output[o] == output)
	{
	    memmove (&xf86_config->output[o],
		     &xf86_config->output[o+1],
		     xf86_config->num_output - (o + 1));
	    xf86_config->num_output--;
	    break;
	}
    if (output->name && output->name != (char *) (output + 1))
	xfree (output->name);
    xfree (output);
}

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/*
 * Called during CreateScreenResources to hook up RandR
 */
static Bool
xf86CrtcCreateScreenResources (ScreenPtr screen)
{
    ScrnInfoPtr		scrn = xf86Screens[screen->myNum];
    xf86CrtcConfigPtr	config = XF86_CRTC_CONFIG_PTR(scrn);

    screen->CreateScreenResources = config->CreateScreenResources;
    
    if (!(*screen->CreateScreenResources)(screen))
	return FALSE;

    if (!xf86RandR12CreateScreenResources (screen))
	return FALSE;

    return TRUE;
}

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/*
 * Clean up config on server reset
 */
static Bool
xf86CrtcCloseScreen (int index, ScreenPtr screen)
{
    ScrnInfoPtr		scrn = xf86Screens[screen->myNum];
    xf86CrtcConfigPtr	config = XF86_CRTC_CONFIG_PTR(scrn);
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    int			o, c;
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    screen->CloseScreen = config->CloseScreen;

    xf86RotateCloseScreen (screen);

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    for (o = 0; o < config->num_output; o++)
    {
	xf86OutputPtr	output = config->output[o];

	output->randr_output = NULL;
    }
    for (c = 0; c < config->num_crtc; c++)
    {
	xf86CrtcPtr	crtc = config->crtc[c];

	crtc->randr_crtc = NULL;
    }
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    return screen->CloseScreen (index, screen);
}

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/*
 * Called at ScreenInit time to set up
 */
Bool
xf86CrtcScreenInit (ScreenPtr screen)
{
    ScrnInfoPtr		scrn = xf86Screens[screen->myNum];
    xf86CrtcConfigPtr	config = XF86_CRTC_CONFIG_PTR(scrn);
    int			c;

    /* Rotation */
    xf86DrvMsg(scrn->scrnIndex, X_INFO, "RandR 1.2 enabled, ignore the following RandR disabled message.\n");
    xf86DisableRandR(); /* Disable old RandR extension support */
    xf86RandR12Init (screen);

    /* support all rotations if every crtc has the shadow alloc funcs */
    for (c = 0; c < config->num_crtc; c++)
    {
	xf86CrtcPtr crtc = config->crtc[c];
	if (!crtc->funcs->shadow_allocate || !crtc->funcs->shadow_create)
	    break;
    }
    if (c == config->num_crtc)
	xf86RandR12SetRotations (screen, RR_Rotate_0 | RR_Rotate_90 |
				 RR_Rotate_180 | RR_Rotate_270);
    else
	xf86RandR12SetRotations (screen, RR_Rotate_0);
    
    /* Wrap CreateScreenResources so we can initialize the RandR code */
    config->CreateScreenResources = screen->CreateScreenResources;
    screen->CreateScreenResources = xf86CrtcCreateScreenResources;
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    config->CloseScreen = screen->CloseScreen;
    screen->CloseScreen = xf86CrtcCloseScreen;
    
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    return TRUE;
}

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static DisplayModePtr
xf86DefaultMode (xf86OutputPtr output, int width, int height)
{
    DisplayModePtr  target_mode = NULL;
    DisplayModePtr  mode;
    int		    target_diff = 0;
    int		    target_preferred = 0;
    int		    mm_height;
    
    mm_height = output->mm_height;
    if (!mm_height)
	mm_height = 203;	/* 768 pixels at 96dpi */
    /*
     * Pick a mode closest to 96dpi 
     */
    for (mode = output->probed_modes; mode; mode = mode->next)
    {
	int	    dpi;
	int	    preferred = (mode->type & M_T_PREFERRED) != 0;
	int	    diff;

714 715 716 717 718 719
	if (xf86ModeWidth (mode, output->initial_rotation) > width ||
	    xf86ModeHeight (mode, output->initial_rotation) > height)
	    continue;
	
	/* yes, use VDisplay here, not xf86ModeHeight */
	dpi = (mode->VDisplay * 254) / (mm_height * 10);
720 721 722 723 724 725 726 727 728 729 730 731 732 733
	diff = dpi - 96;
	diff = diff < 0 ? -diff : diff;
	if (target_mode == NULL || (preferred > target_preferred) ||
	    (preferred == target_preferred && diff < target_diff))
	{
	    target_mode = mode;
	    target_diff = diff;
	    target_preferred = preferred;
	}
    }
    return target_mode;
}

static DisplayModePtr
734 735
xf86ClosestMode (xf86OutputPtr output, 
		 DisplayModePtr match, Rotation match_rotation,
736 737 738 739 740 741 742 743 744 745 746 747 748 749
		 int width, int height)
{
    DisplayModePtr  target_mode = NULL;
    DisplayModePtr  mode;
    int		    target_diff = 0;
    
    /*
     * Pick a mode closest to the specified mode
     */
    for (mode = output->probed_modes; mode; mode = mode->next)
    {
	int	    dx, dy;
	int	    diff;

750 751 752
	if (xf86ModeWidth (mode, output->initial_rotation) > width ||
	    xf86ModeHeight (mode, output->initial_rotation) > height)
	    continue;
753 754
	
	/* exact matches are preferred */
755 756
	if (output->initial_rotation == match_rotation &&
	    xf86ModesEqual (mode, match))
757 758
	    return mode;
	
759 760
	dx = xf86ModeWidth (match, match_rotation) - xf86ModeWidth (mode, output->initial_rotation);
	dy = xf86ModeHeight (match, match_rotation) - xf86ModeHeight (mode, output->initial_rotation);
761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777
	diff = dx * dx + dy * dy;
	if (target_mode == NULL || diff < target_diff)
	{
	    target_mode = mode;
	    target_diff = diff;
	}
    }
    return target_mode;
}

static Bool
xf86OutputHasPreferredMode (xf86OutputPtr output, int width, int height)
{
    DisplayModePtr  mode;

    for (mode = output->probed_modes; mode; mode = mode->next)
    {
778 779 780 781
	if (xf86ModeWidth (mode, output->initial_rotation) > width ||
	    xf86ModeHeight (mode, output->initial_rotation) > height)
	    continue;

782 783 784 785 786 787 788 789 790 791 792 793 794 795 796
	if (mode->type & M_T_PREFERRED)
	    return TRUE;
    }
    return FALSE;
}

static int
xf86PickCrtcs (ScrnInfoPtr	scrn,
	       xf86CrtcPtr	*best_crtcs,
	       DisplayModePtr	*modes,
	       int		n,
	       int		width,
	       int		height)
{
    xf86CrtcConfigPtr	config = XF86_CRTC_CONFIG_PTR(scrn);
797
    int		    c, o;
798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854
    xf86OutputPtr   output;
    xf86CrtcPtr	    crtc;
    xf86CrtcPtr	    *crtcs;
    xf86CrtcPtr	    best_crtc;
    int		    best_score;
    int		    score;
    int		    my_score;
    
    if (n == config->num_output)
	return 0;
    output = config->output[n];
    
    /*
     * Compute score with this output disabled
     */
    best_crtcs[n] = NULL;
    best_crtc = NULL;
    best_score = xf86PickCrtcs (scrn, best_crtcs, modes, n+1, width, height);
    if (modes[n] == NULL)
	return best_score;
    
    crtcs = xalloc (config->num_output * sizeof (xf86CrtcPtr));
    if (!crtcs)
	return best_score;

    my_score = 1;
    /* Score outputs that are known to be connected higher */
    if (output->status == XF86OutputStatusConnected)
	my_score++;
    /* Score outputs with preferred modes higher */
    if (xf86OutputHasPreferredMode (output, width, height))
	my_score++;
    /*
     * Select a crtc for this output and
     * then attempt to configure the remaining
     * outputs
     */
    for (c = 0; c < config->num_crtc; c++)
    {
	if ((output->possible_crtcs & (1 << c)) == 0)
	    continue;
	
	crtc = config->crtc[c];
	/*
	 * Check to see if some other output is
	 * using this crtc
	 */
	for (o = 0; o < n; o++)
	    if (best_crtcs[o] == crtc)
		break;
	if (o < n)
	{
	    /*
	     * If the two outputs desire the same mode,
	     * see if they can be cloned
	     */
	    if (xf86ModesEqual (modes[o], modes[n]) &&
855
		config->output[0]->initial_rotation == config->output[n]->initial_rotation &&
856 857 858
		config->output[o]->initial_x == config->output[n]->initial_x &&
		config->output[o]->initial_y == config->output[n]->initial_y)
	    {
859
		if ((output->possible_clones & (1 << o)) == 0)
860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881
		    continue;		/* nope, try next CRTC */
	    }
	    else
		continue;		/* different modes, can't clone */
	}
	crtcs[n] = crtc;
	memcpy (crtcs, best_crtcs, n * sizeof (xf86CrtcPtr));
	score = my_score + xf86PickCrtcs (scrn, crtcs, modes, n+1, width, height);
	if (score > best_score)
	{
	    best_crtc = crtc;
	    best_score = score;
	    memcpy (best_crtcs, crtcs, config->num_output * sizeof (xf86CrtcPtr));
	}
    }
    xfree (crtcs);
    return best_score;
}


/*
 * Compute the virtual size necessary to place all of the available
882 883 884 885 886
 * crtcs in the specified configuration.
 *
 * canGrow indicates that the driver can make the screen larger than its initial
 * configuration.  If FALSE, this function will enlarge the screen to include
 * the largest available mode.
887 888 889
 */

static void
890 891
xf86DefaultScreenLimits (ScrnInfoPtr scrn, int *widthp, int *heightp,
			 Bool canGrow)
892 893 894 895 896 897 898 899 900 901 902 903 904 905
{
    xf86CrtcConfigPtr	config = XF86_CRTC_CONFIG_PTR(scrn);
    int	    width = 0, height = 0;
    int	    o;
    int	    c;
    int	    s;

    for (c = 0; c < config->num_crtc; c++)
    {
	int	    crtc_width = 0, crtc_height = 0;
	xf86CrtcPtr crtc = config->crtc[c];

	if (crtc->enabled)
	{
906 907
	    crtc_width = crtc->x + xf86ModeWidth (&crtc->desiredMode, crtc->desiredRotation);
	    crtc_height = crtc->y + xf86ModeHeight (&crtc->desiredMode, crtc->desiredRotation);
908
	}
909 910 911 912
	if (!canGrow) {
	    for (o = 0; o < config->num_output; o++)
	    {
		xf86OutputPtr   output = config->output[o];
913

914 915
		for (s = 0; s < config->num_crtc; s++)
		    if (output->possible_crtcs & (1 << s))
916
		    {
917 918 919 920 921 922 923 924 925 926 927 928
			DisplayModePtr  mode;
			for (mode = output->probed_modes; mode; mode = mode->next)
			{
			    if (mode->HDisplay > crtc_width)
				crtc_width = mode->HDisplay;
			    if (mode->VDisplay > crtc_width)
				crtc_width = mode->VDisplay;
			    if (mode->VDisplay > crtc_height)
				crtc_height = mode->VDisplay;
			    if (mode->HDisplay > crtc_height)
				crtc_height = mode->HDisplay;
			}
929
		    }
930
	    }
931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028
	}
	if (crtc_width > width)
	    width = crtc_width;
	if (crtc_height > height)
	    height = crtc_height;
    }
    if (config->maxWidth && width > config->maxWidth) width = config->maxWidth;
    if (config->maxHeight && height > config->maxHeight) height = config->maxHeight;
    if (config->minWidth && width < config->minWidth) width = config->minWidth;
    if (config->minHeight && height < config->minHeight) height = config->minHeight;
    *widthp = width;
    *heightp = height;
}

#define POSITION_UNSET	-100000

static Bool
xf86InitialOutputPositions (ScrnInfoPtr scrn, DisplayModePtr *modes)
{
    xf86CrtcConfigPtr	config = XF86_CRTC_CONFIG_PTR(scrn);
    int			o;
    int			min_x, min_y;
    
    for (o = 0; o < config->num_output; o++)
    {
	xf86OutputPtr	output = config->output[o];

	output->initial_x = output->initial_y = POSITION_UNSET;
    }
    
    /*
     * Loop until all outputs are set
     */
    for (;;)
    {
	Bool	any_set = FALSE;
	Bool	keep_going = FALSE;

	for (o = 0; o < config->num_output; o++)	
	{
	    static const OutputOpts	relations[] = {
		OPTION_BELOW, OPTION_RIGHT_OF, OPTION_ABOVE, OPTION_LEFT_OF
	    };
	    xf86OutputPtr   output = config->output[o];
	    xf86OutputPtr   relative;
	    char	    *relative_name;
	    char	    *position;
	    OutputOpts	    relation;
	    int		    r;

	    if (output->initial_x != POSITION_UNSET)
		continue;
	    position = xf86GetOptValString (output->options,
					    OPTION_POSITION);
	    /*
	     * Absolute position wins
	     */
	    if (position)
	    {
		int		    x, y;
		if (sscanf (position, "%d %d", &x, &y) == 2)
		{
		    output->initial_x = x;
		    output->initial_y = y;
		}
		else
		{
		    xf86DrvMsg (scrn->scrnIndex, X_ERROR,
				"Output %s position not of form \"x y\"\n",
				output->name);
		    output->initial_x = output->initial_y = 0;
		}
		any_set = TRUE;
		continue;
	    }
	    /*
	     * Next comes relative positions
	     */
	    relation = 0;
	    relative_name = NULL;
	    for (r = 0; r < 4; r++)
	    {
		relation = relations[r];
		relative_name = xf86GetOptValString (output->options,
						     relation);
		if (relative_name)
		    break;
	    }
	    if (relative_name)
	    {
		int or;
		relative = NULL;
		for (or = 0; or < config->num_output; or++)
		{
		    xf86OutputPtr	out_rel = config->output[or];
		    XF86ConfMonitorPtr	rel_mon = out_rel->conf_monitor;

		    if (rel_mon)
1029 1030 1031 1032 1033 1034 1035 1036 1037
		    {
			if (xf86nameCompare (rel_mon->mon_identifier,
					      relative_name) == 0)
			{
			    relative = config->output[or];
			    break;
			}
		    }
		    if (strcmp (out_rel->name, relative_name) == 0)
1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061
		    {
			relative = config->output[or];
			break;
		    }
		}
		if (!relative)
		{
		    xf86DrvMsg (scrn->scrnIndex, X_ERROR,
				"Cannot position output %s relative to unknown output %s\n",
				output->name, relative_name);
		    output->initial_x = 0;
		    output->initial_y = 0;
		    any_set = TRUE;
		    continue;
		}
		if (relative->initial_x == POSITION_UNSET)
		{
		    keep_going = TRUE;
		    continue;
		}
		output->initial_x = relative->initial_x;
		output->initial_y = relative->initial_y;
		switch (relation) {
		case OPTION_BELOW:
1062
		    output->initial_y += xf86ModeHeight (modes[or], relative->initial_rotation);
1063 1064
		    break;
		case OPTION_RIGHT_OF:
1065
		    output->initial_x += xf86ModeWidth (modes[or], relative->initial_rotation);
1066 1067
		    break;
		case OPTION_ABOVE:
1068
		    output->initial_y -= xf86ModeHeight (modes[or], relative->initial_rotation);
1069 1070
		    break;
		case OPTION_LEFT_OF:
1071
		    output->initial_x -= xf86ModeWidth (modes[or], relative->initial_rotation);
1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219
		    break;
		default:
		    break;
		}
		any_set = TRUE;
		continue;
	    }
	    
	    /* Nothing set, just stick them at 0,0 */
	    output->initial_x = 0;
	    output->initial_y = 0;
	    any_set = TRUE;
	}
	if (!keep_going)
	    break;
	if (!any_set) 
	{
	    for (o = 0; o < config->num_output; o++)
	    {
		xf86OutputPtr   output = config->output[o];
		if (output->initial_x == POSITION_UNSET)
		{
		    xf86DrvMsg (scrn->scrnIndex, X_ERROR,
				"Output position loop. Moving %s to 0,0\n",
				output->name);
		    output->initial_x = output->initial_y = 0;
		    break;
		}
	    }
	}
    }

    /*
     * normalize positions
     */
    min_x = 1000000;
    min_y = 1000000;
    for (o = 0; o < config->num_output; o++)
    {
	xf86OutputPtr	output = config->output[o];

	if (output->initial_x < min_x)
	    min_x = output->initial_x;
	if (output->initial_y < min_y)
	    min_y = output->initial_y;
    }
    
    for (o = 0; o < config->num_output; o++)
    {
	xf86OutputPtr	output = config->output[o];

	output->initial_x -= min_x;
	output->initial_y -= min_y;
    }
    return TRUE;
}

/*
 * XXX walk the monitor mode list and prune out duplicates that
 * are inserted by xf86DDCMonitorSet. In an ideal world, that
 * function would do this work by itself.
 */

static void
xf86PruneDuplicateMonitorModes (MonPtr Monitor)
{
    DisplayModePtr  master, clone, next;

    for (master = Monitor->Modes; 
	 master && master != Monitor->Last; 
	 master = master->next)
    {
	for (clone = master->next; clone && clone != Monitor->Modes; clone = next)
	{
	    next = clone->next;
	    if (xf86ModesEqual (master, clone))
	    {
		if (Monitor->Last == clone)
		    Monitor->Last = clone->prev;
		xf86DeleteMode (&Monitor->Modes, clone);
	    }
	}
    }
}

/** Return - 0 + if a should be earlier, same or later than b in list
 */
static int
xf86ModeCompare (DisplayModePtr a, DisplayModePtr b)
{
    int	diff;

    diff = ((b->type & M_T_PREFERRED) != 0) - ((a->type & M_T_PREFERRED) != 0);
    if (diff)
	return diff;
    diff = b->HDisplay * b->VDisplay - a->HDisplay * a->VDisplay;
    if (diff)
	return diff;
    diff = b->Clock - a->Clock;
    return diff;
}

/**
 * Insertion sort input in-place and return the resulting head
 */
static DisplayModePtr
xf86SortModes (DisplayModePtr input)
{
    DisplayModePtr  output = NULL, i, o, n, *op, prev;

    /* sort by preferred status and pixel area */
    while (input)
    {
	i = input;
	input = input->next;
	for (op = &output; (o = *op); op = &o->next)
	    if (xf86ModeCompare (o, i) > 0)
		break;
	i->next = *op;
	*op = i;
    }
    /* prune identical modes */
    for (o = output; o && (n = o->next); o = n)
    {
	if (!strcmp (o->name, n->name) && xf86ModesEqual (o, n))
	{
	    o->next = n->next;
	    xfree (n->name);
	    xfree (n);
	    n = o;
	}
    }
    /* hook up backward links */
    prev = NULL;
    for (o = output; o; o = o->next)
    {
	o->prev = prev;
	prev = o;
    }
    return output;
}

void
xf86ProbeOutputModes (ScrnInfoPtr scrn, int maxX, int maxY)
{
    xf86CrtcConfigPtr	config = XF86_CRTC_CONFIG_PTR(scrn);
    int			o;

1220 1221 1222 1223 1224 1225 1226 1227 1228
    /* When canGrow was TRUE in the initial configuration we have to
     * compare against the maximum values so that we don't drop modes.
     * When canGrow was FALSE, the maximum values would have been clamped
     * anyway.
     */
    if (maxX == 0 || maxY == 0) {
	maxX = config->maxWidth;
	maxY = config->maxHeight;
    }
1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255

    /* Elide duplicate modes before defaulting code uses them */
    xf86PruneDuplicateMonitorModes (scrn->monitor);
    
    /* Probe the list of modes for each output. */
    for (o = 0; o < config->num_output; o++) 
    {
	xf86OutputPtr	    output = config->output[o];
	DisplayModePtr	    mode;
	DisplayModePtr	    config_modes = NULL, output_modes, default_modes;
	char		    *preferred_mode;
	xf86MonPtr	    edid_monitor;
	XF86ConfMonitorPtr  conf_monitor;
	MonRec		    mon_rec;
	int		    min_clock = 0;
	int		    max_clock = 0;
	double		    clock;
	enum { sync_config, sync_edid, sync_default } sync_source = sync_default;
	
	while (output->probed_modes != NULL)
	    xf86DeleteMode(&output->probed_modes, output->probed_modes);

	/*
	 * Check connection status
	 */
	output->status = (*output->funcs->detect)(output);

1256
	if (!xf86OutputEnabled (output))
1257 1258
	{
	    xf86OutputSetEDID (output, NULL);
1259
	    continue;
1260
	}
1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388

	memset (&mon_rec, '\0', sizeof (mon_rec));
	
	conf_monitor = output->conf_monitor;
	
	if (conf_monitor)
	{
	    int	i;
	    
	    for (i = 0; i < conf_monitor->mon_n_hsync; i++)
	    {
		mon_rec.hsync[mon_rec.nHsync].lo = conf_monitor->mon_hsync[i].lo;
		mon_rec.hsync[mon_rec.nHsync].hi = conf_monitor->mon_hsync[i].hi;
		mon_rec.nHsync++;
		sync_source = sync_config;
	    }
	    for (i = 0; i < conf_monitor->mon_n_vrefresh; i++)
	    {
		mon_rec.vrefresh[mon_rec.nVrefresh].lo = conf_monitor->mon_vrefresh[i].lo;
		mon_rec.vrefresh[mon_rec.nVrefresh].hi = conf_monitor->mon_vrefresh[i].hi;
		mon_rec.nVrefresh++;
		sync_source = sync_config;
	    }
	    config_modes = xf86GetMonitorModes (scrn, conf_monitor);
	}
	
	output_modes = (*output->funcs->get_modes) (output);
	
	edid_monitor = output->MonInfo;
	
	if (edid_monitor)
	{
	    int			    i;
	    Bool		    set_hsync = mon_rec.nHsync == 0;
	    Bool		    set_vrefresh = mon_rec.nVrefresh == 0;

	    for (i = 0; i < sizeof (edid_monitor->det_mon) / sizeof (edid_monitor->det_mon[0]); i++)
	    {
		if (edid_monitor->det_mon[i].type == DS_RANGES)
		{
		    struct monitor_ranges   *ranges = &edid_monitor->det_mon[i].section.ranges;
		    if (set_hsync && ranges->max_h)
		    {
			mon_rec.hsync[mon_rec.nHsync].lo = ranges->min_h;
			mon_rec.hsync[mon_rec.nHsync].hi = ranges->max_h;
			mon_rec.nHsync++;
			if (sync_source == sync_default)
			    sync_source = sync_edid;
		    }
		    if (set_vrefresh && ranges->max_v)
		    {
			mon_rec.vrefresh[mon_rec.nVrefresh].lo = ranges->min_v;
			mon_rec.vrefresh[mon_rec.nVrefresh].hi = ranges->max_v;
			mon_rec.nVrefresh++;
			if (sync_source == sync_default)
			    sync_source = sync_edid;
		    }
		    if (ranges->max_clock > max_clock)
			max_clock = ranges->max_clock;
		}
	    }
	}

	if (xf86GetOptValFreq (output->options, OPTION_MIN_CLOCK,
			       OPTUNITS_KHZ, &clock))
	    min_clock = (int) clock;
	if (xf86GetOptValFreq (output->options, OPTION_MAX_CLOCK,
			       OPTUNITS_KHZ, &clock))
	    max_clock = (int) clock;

	/*
	 * These limits will end up setting a 1024x768@60Hz mode by default,
	 * which seems like a fairly good mode to use when nothing else is
	 * specified
	 */
	if (mon_rec.nHsync == 0)
	{
	    mon_rec.hsync[0].lo = 31.0;
	    mon_rec.hsync[0].hi = 55.0;
	    mon_rec.nHsync = 1;
	}
	if (mon_rec.nVrefresh == 0)
	{
	    mon_rec.vrefresh[0].lo = 58.0;
	    mon_rec.vrefresh[0].hi = 62.0;
	    mon_rec.nVrefresh = 1;
	}
	default_modes = xf86GetDefaultModes (output->interlaceAllowed,
					     output->doubleScanAllowed);
	
	if (sync_source == sync_config)
	{
	    /* 
	     * Check output and config modes against sync range from config file
	     */
	    xf86ValidateModesSync (scrn, output_modes, &mon_rec);
	    xf86ValidateModesSync (scrn, config_modes, &mon_rec);
	}
	/*
	 * Check default modes against sync range
	 */
        xf86ValidateModesSync (scrn, default_modes, &mon_rec);
	/*
	 * Check default modes against monitor max clock
	 */
	if (max_clock)
	    xf86ValidateModesClocks(scrn, default_modes,
				    &min_clock, &max_clock, 1);
	
	output->probed_modes = NULL;
	output->probed_modes = xf86ModesAdd (output->probed_modes, config_modes);
	output->probed_modes = xf86ModesAdd (output->probed_modes, output_modes);
	output->probed_modes = xf86ModesAdd (output->probed_modes, default_modes);
	
	/*
	 * Check all modes against max size
	 */
	if (maxX && maxY)
	    xf86ValidateModesSize (scrn, output->probed_modes,
				       maxX, maxY, 0);
	 
	/*
	 * Check all modes against output
	 */
	for (mode = output->probed_modes; mode != NULL; mode = mode->next) 
	    if (mode->status == MODE_OK)
		mode->status = (*output->funcs->mode_valid)(output, mode);
	
1389 1390
	xf86PruneInvalidModes(scrn, &output->probed_modes,
			      config->debug_modes);
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	output->probed_modes = xf86SortModes (output->probed_modes);
	
	/* Check for a configured preference for a particular mode */
	preferred_mode = xf86GetOptValString (output->options,
					      OPTION_PREFERRED_MODE);

	if (preferred_mode)
	{
	    for (mode = output->probed_modes; mode; mode = mode->next)
	    {
		if (!strcmp (preferred_mode, mode->name))
		{
		    if (mode != output->probed_modes)
		    {
			if (mode->prev)
			    mode->prev->next = mode->next;
			if (mode->next)
			    mode->next->prev = mode->prev;
			mode->next = output->probed_modes;
			output->probed_modes->prev = mode;
			mode->prev = NULL;
			output->probed_modes = mode;
		    }
		    mode->type |= M_T_PREFERRED;
		    break;
		}
	    }
	}
	
1421 1422
	output->initial_rotation = xf86OutputInitialRotation (output);

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	if (config->debug_modes) {
	    if (output->probed_modes != NULL) {
		xf86DrvMsg(scrn->scrnIndex, X_INFO,
			   "Printing probed modes for output %s\n",
			   output->name);
	    } else {
		xf86DrvMsg(scrn->scrnIndex, X_INFO,
			   "No remaining probed modes for output %s\n",
			   output->name);
	    }
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	}
	for (mode = output->probed_modes; mode != NULL; mode = mode->next)
	{
	    /* The code to choose the best mode per pipe later on will require
	     * VRefresh to be set.
	     */
	    mode->VRefresh = xf86ModeVRefresh(mode);
	    xf86SetModeCrtc(mode, INTERLACE_HALVE_V);

1442 1443
	    if (config->debug_modes)
		xf86PrintModeline(scrn->scrnIndex, mode);
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	}
    }
}


/**
 * Copy one of the output mode lists to the ScrnInfo record
 */

/* XXX where does this function belong? Here? */
void
xf86RandR12GetOriginalVirtualSize(ScrnInfoPtr scrn, int *x, int *y);

void
xf86SetScrnInfoModes (ScrnInfoPtr scrn)
{
    xf86CrtcConfigPtr	config = XF86_CRTC_CONFIG_PTR(scrn);
    xf86OutputPtr	output;
    xf86CrtcPtr		crtc;
    DisplayModePtr	last, mode;

    output = config->output[config->compat_output];
    if (!output->crtc)
    {
	int o;

	output = NULL;
	for (o = 0; o < config->num_output; o++)
	    if (config->output[o]->crtc)
	    {
		config->compat_output = o;
		output = config->output[o];
		break;
	    }
	/* no outputs are active, punt and leave things as they are */
	if (!output)
	    return;
    }
    crtc = output->crtc;

    /* Clear any existing modes from scrn->modes */
    while (scrn->modes != NULL)
	xf86DeleteMode(&scrn->modes, scrn->modes);

    /* Set scrn->modes to the mode list for the 'compat' output */
    scrn->modes = xf86DuplicateModes(scrn, output->probed_modes);

    for (mode = scrn->modes; mode; mode = mode->next)
	if (xf86ModesEqual (mode, &crtc->desiredMode))
	    break;

    if (scrn->modes != NULL) {
	/* For some reason, scrn->modes is circular, unlike the other mode
	 * lists.  How great is that?
	 */
	for (last = scrn->modes; last && last->next; last = last->next)
	    ;
	last->next = scrn->modes;
	scrn->modes->prev = last;
	if (mode) {
	    while (scrn->modes != mode)
		scrn->modes = scrn->modes->next;
	}
    }
    scrn->currentMode = scrn->modes;
}

/**
 * Construct default screen configuration
 *
 * Given auto-detected (and, eventually, configured) values,
 * construct a usable configuration for the system
1516 1517 1518 1519 1520 1521 1522
 *
 * canGrow indicates that the driver can resize the screen to larger than its
 * initially configured size via the config->funcs->resize hook.  If TRUE, this
 * function will set virtualX and virtualY to match the initial configuration
 * and leave config->max{Width,Height} alone.  If FALSE, it will bloat
 * virtual[XY] to include the largest modes and set config->max{Width,Height}
 * accordingly.
1523 1524 1525
 */

Bool
1526
xf86InitialConfiguration (ScrnInfoPtr scrn, Bool canGrow)
1527 1528 1529 1530
{
    xf86CrtcConfigPtr	config = XF86_CRTC_CONFIG_PTR(scrn);
    int			o, c;
    DisplayModePtr	target_mode = NULL;
1531
    Rotation		target_rotation = RR_Rotate_0;
1532 1533 1534 1535 1536 1537
    xf86CrtcPtr		*crtcs;
    DisplayModePtr	*modes;
    Bool		*enabled;
    int			width;
    int			height;

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    /* Set up the device options */
    config->options = xnfalloc (sizeof (xf86DeviceOptions));
    memcpy (config->options, xf86DeviceOptions, sizeof (xf86DeviceOptions));
    xf86ProcessOptions (scrn->scrnIndex,
			scrn->options,
			config->options);
    config->debug_modes = xf86ReturnOptValBool (config->options,
						OPTION_MODEDEBUG, FALSE);

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    if (scrn->display->virtualX)
	width = scrn->display->virtualX;
    else
	width = config->maxWidth;
    if (scrn->display->virtualY)
	height = scrn->display->virtualY;
    else
	height = config->maxHeight;

    xf86ProbeOutputModes (scrn, width, height);

    crtcs = xnfcalloc (config->num_output, sizeof (xf86CrtcPtr));
    modes = xnfcalloc (config->num_output, sizeof (DisplayModePtr));
    enabled = xnfcalloc (config->num_output, sizeof (Bool));
    
    for (o = 0; o < config->num_output; o++)
    {
	xf86OutputPtr output = config->output[o];
	
	modes[o] = NULL;
1567
	enabled[o] = xf86OutputEnabled (output);
1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580
    }
    
    /*
     * Let outputs with preferred modes drive screen size
     */
    for (o = 0; o < config->num_output; o++)
    {
	xf86OutputPtr output = config->output[o];

	if (enabled[o] &&
	    xf86OutputHasPreferredMode (output, width, height))
	{
	    target_mode = xf86DefaultMode (output, width, height);
1581
	    target_rotation = output->initial_rotation;
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	    if (target_mode)
	    {
		modes[o] = target_mode;
		config->compat_output = o;
		break;
	    }
	}
    }
    if (!target_mode)
    {
	for (o = 0; o < config->num_output; o++)
	{
	    xf86OutputPtr output = config->output[o];
	    if (enabled[o])
	    {
		target_mode = xf86DefaultMode (output, width, height);
1598
		target_rotation = output->initial_rotation;
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		if (target_mode)
		{
		    modes[o] = target_mode;
		    config->compat_output = o;
		    break;
		}
	    }
	}
    }
    for (o = 0; o < config->num_output; o++)
    {
	xf86OutputPtr output = config->output[o];
	
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	if (enabled[o])
	{
	    if (!modes[o])
		modes[o] = xf86ClosestMode (output, target_mode,
					    target_rotation, width, height);
	    if (!modes[o])
		xf86DrvMsg (scrn->scrnIndex, X_ERROR,
			    "Output %s enabled but has no modes\n",
			    output->name);
	    else
		xf86DrvMsg (scrn->scrnIndex, X_INFO,
			    "Output %s using initial mode %s\n",
			    output->name, modes[o]->name);
	}
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    }

    /*
     * Set the position of each output
     */
    if (!xf86InitialOutputPositions (scrn, modes))
    {
	xfree (crtcs);
	xfree (modes);
	return FALSE;
    }
	
    /*
     * Assign CRTCs to fit output configuration
     */
    if (!xf86PickCrtcs (scrn, crtcs, modes, 0, width, height))
    {
	xfree (crtcs);
	xfree (modes);
	return FALSE;
    }
    
    /* XXX override xf86 common frame computation code */
    
    scrn->display->frameX0 = 0;
    scrn->display->frameY0 = 0;
    
    for (c = 0; c < config->num_crtc; c++)
    {
	xf86CrtcPtr	crtc = config->crtc[c];

	crtc->enabled = FALSE;
	memset (&crtc->desiredMode, '\0', sizeof (crtc->desiredMode));
    }
    
    /*
     * Set initial configuration
     */
    for (o = 0; o < config->num_output; o++)
    {
	xf86OutputPtr	output = config->output[o];
	DisplayModePtr	mode = modes[o];
        xf86CrtcPtr	crtc = crtcs[o];

	if (mode && crtc)
	{
	    crtc->desiredMode = *mode;
1673
	    crtc->desiredRotation = output->initial_rotation;
1674 1675
	    crtc->desiredX = output->initial_x;
	    crtc->desiredY = output->initial_y;
1676 1677 1678 1679 1680 1681 1682 1683 1684 1685
	    crtc->enabled = TRUE;
	    crtc->x = output->initial_x;
	    crtc->y = output->initial_y;
	    output->crtc = crtc;
	}
    }
    
    if (scrn->display->virtualX == 0)
    {
	/*
1686 1687
	 * Expand virtual size to cover the current config and potential mode
	 * switches, if the driver can't enlarge the screen later.
1688
	 */
1689
	xf86DefaultScreenLimits (scrn, &width, &height, canGrow);
1690 1691 1692 1693 1694 1695 1696 1697 1698
    
	scrn->display->virtualX = width;
	scrn->display->virtualY = height;
    }

    if (width > scrn->virtualX)
	scrn->virtualX = width;
    if (height > scrn->virtualY)
	scrn->virtualY = height;
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    /*
     * Make sure the configuration isn't too small.
     */
    if (width < config->minWidth || height < config->minHeight)
	return FALSE;

    /*
     * Limit the crtc config to virtual[XY] if the driver can't grow the
     * desktop.
     */
    if (!canGrow)
    {
	xf86CrtcSetSizeRange (scrn, config->minWidth, config->minHeight,
			      width, height);
    }

1716 1717 1718 1719 1720 1721 1722 1723
    /* Mirror output modes to scrn mode list */
    xf86SetScrnInfoModes (scrn);
    
    xfree (crtcs);
    xfree (modes);
    return TRUE;
}

1724 1725 1726 1727 1728 1729 1730 1731 1732
/*
 * Using the desired mode information in each crtc, set
 * modes (used in EnterVT functions, or at server startup)
 */

Bool
xf86SetDesiredModes (ScrnInfoPtr scrn)
{
    xf86CrtcConfigPtr   config = XF86_CRTC_CONFIG_PTR(scrn);
1733
    int			c, o;
1734

1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752
    /*
     * Turn off everything so mode setting is done
     * with hardware in a consistent state
     */
    for (o = 0; o < config->num_output; o++) 
    {
	xf86OutputPtr  output = config->output[o];
	(*output->funcs->dpms)(output, DPMSModeOff);
    }

    for (c = 0; c < config->num_crtc; c++) 
    {
	xf86CrtcPtr crtc = config->crtc[c];

	crtc->funcs->dpms(crtc, DPMSModeOff);
	memset(&crtc->mode, 0, sizeof(crtc->mode));
    }
    
1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798
    for (c = 0; c < config->num_crtc; c++)
    {
	xf86CrtcPtr	crtc = config->crtc[c];
	xf86OutputPtr	output = NULL;
	int		o;

	if (config->output[config->compat_output]->crtc == crtc)
	    output = config->output[config->compat_output];
	else
	{
	    for (o = 0; o < config->num_output; o++)
		if (config->output[o]->crtc == crtc)
		{
		    output = config->output[o];
		    break;
		}
	}
	/*
	 * Skip disabled crtcs
	 */
	if (!output)
	    continue;

	/* Mark that we'll need to re-set the mode for sure */
	memset(&crtc->mode, 0, sizeof(crtc->mode));
	if (!crtc->desiredMode.CrtcHDisplay)
	{
	    DisplayModePtr  mode = xf86OutputFindClosestMode (output, scrn->currentMode);

	    if (!mode)
		return FALSE;
	    crtc->desiredMode = *mode;
	    crtc->desiredRotation = RR_Rotate_0;
	    crtc->desiredX = 0;
	    crtc->desiredY = 0;
	}

	if (!xf86CrtcSetMode (crtc, &crtc->desiredMode, crtc->desiredRotation,
			      crtc->desiredX, crtc->desiredY))
	    return FALSE;
    }

    xf86DisableUnusedFunctions(scrn);
    return TRUE;
}

1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914
/**
 * In the current world order, there are lists of modes per output, which may
 * or may not include the mode that was asked to be set by XFree86's mode
 * selection.  Find the closest one, in the following preference order:
 *
 * - Equality
 * - Closer in size to the requested mode, but no larger
 * - Closer in refresh rate to the requested mode.
 */

DisplayModePtr
xf86OutputFindClosestMode (xf86OutputPtr output, DisplayModePtr desired