xf86crtc.c

显驱动 Intel英特尔G45G43G41G35G33G31G965Q963Q965GM965系列显卡最新X.Org驱动2.4.0版For Linux

 * 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;
}

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

    /* 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;
    }

    /* 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);

	if (output->status == XF86OutputStatusDisconnected)
	{
	    xf86OutputSetEDID (output, NULL);
	    continue;
	}

	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);
	
	xf86PruneInvalidModes(scrn, &output->probed_modes,
			      config->debug_modes);
	
	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;
		}
		else
		    mode->type &= ~M_T_PREFERRED;
	    }
	}
	
	output->initial_rotation = xf86OutputInitialRotation (output);

	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);
	    }
	}
	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);

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


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

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

_X_EXPORT 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
 *
 * 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.
 */

_X_EXPORT Bool
xf86InitialConfiguration (ScrnInfoPtr scrn, Bool canGrow)
{
    xf86CrtcConfigPtr	config = XF86_CRTC_CONFIG_PTR(scrn);
    int			o, c;
    DisplayModePtr	target_mode = NULL;
    Rotation		target_rotation = RR_Rotate_0;
    xf86CrtcPtr		*crtcs;
    DisplayModePtr	*modes;
    Bool		*enabled;
    int			width;
    int			height;

    /* 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);

    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;
	enabled[o] = xf86OutputEnabled (output);
    }
    
    /*
     * 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);
	    target_rotation = output->initial_rotation;
	    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);
		target_rotation = output->initial_rotation;
		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];
	
	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);
	}
    }

    /*
     * 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;
	    crtc->desiredRotation = output->initial_rotation;
	    crtc->desiredX = output->initial_x;
	    crtc->desiredY = output->initial_y;
	    crtc->enabled = TRUE;
	    crtc->x = output->initial_x;
	    crtc->y = output->initial_y;
	    output->crtc = crtc;
	}
    }
    
    if (scrn->display->virtualX == 0)
    {
	/*
	 * Expand virtual size to cover the current config and potential mode
	 * switches, if the driver can't enlarge the screen later.
	 */
	xf86DefaultScreenLimits (scrn, &width, &height, canGrow);
    
	scrn->display->virtualX = width;
	scrn->display->virtualY = height;
    }

    if (width > scrn->virtualX)
	scrn->virtualX = width;
    if (height > scrn->virtualY)