/*
 * Copyright © 2007 Red Hat, 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 (including the next
 * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
 *
 * Authors:
 *    Dave Airlie <airlied@redhat.com>
 *
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "xorgVersion.h"

#include "i830.h"
#include "intel_bufmgr.h"
#include "xf86drmMode.h"
#include "X11/Xatom.h"

typedef struct {
    int fd;
    uint32_t fb_id;
    drmModeResPtr mode_res;
    int cpp;
} drmmode_rec, *drmmode_ptr;

typedef struct {
    drmmode_ptr drmmode;
    drmModeCrtcPtr mode_crtc;
    dri_bo *cursor;
    dri_bo *rotate_bo;
    uint32_t rotate_fb_id;
} drmmode_crtc_private_rec, *drmmode_crtc_private_ptr;

typedef struct {
    drmModePropertyPtr mode_prop;
    uint64_t value;
    int num_atoms; /* if range prop, num_atoms == 1; if enum prop, num_atoms == num_enums + 1 */
    Atom *atoms;
} drmmode_prop_rec, *drmmode_prop_ptr;

typedef struct {
    drmmode_ptr drmmode;
    int output_id;
    drmModeConnectorPtr mode_output;
    drmModeEncoderPtr mode_encoder;
    drmModePropertyBlobPtr edid_blob;
    int num_props;
    drmmode_prop_ptr props;
} drmmode_output_private_rec, *drmmode_output_private_ptr;

static void
drmmode_output_dpms(xf86OutputPtr output, int mode);

static void
drmmode_ConvertFromKMode(ScrnInfoPtr scrn,
			 drmModeModeInfoPtr kmode,
			 DisplayModePtr	mode)
{
	memset(mode, 0, sizeof(DisplayModeRec));
	mode->status = MODE_OK;

	mode->Clock = kmode->clock;

	mode->HDisplay = kmode->hdisplay;
	mode->HSyncStart = kmode->hsync_start;
	mode->HSyncEnd = kmode->hsync_end;
	mode->HTotal = kmode->htotal;
	mode->HSkew = kmode->hskew;

	mode->VDisplay = kmode->vdisplay;
	mode->VSyncStart = kmode->vsync_start;
	mode->VSyncEnd = kmode->vsync_end;
	mode->VTotal = kmode->vtotal;
	mode->VScan = kmode->vscan;

	mode->Flags = kmode->flags; //& FLAG_BITS;
	mode->name = strdup(kmode->name);

	if (kmode->type & DRM_MODE_TYPE_DRIVER)
		mode->type = M_T_DRIVER;
	if (kmode->type & DRM_MODE_TYPE_PREFERRED)
		mode->type |= M_T_PREFERRED;
	xf86SetModeCrtc (mode, scrn->adjustFlags);
}

static void
drmmode_ConvertToKMode(ScrnInfoPtr scrn,
		       drmModeModeInfoPtr kmode,
		       DisplayModePtr mode)
{
	memset(kmode, 0, sizeof(*kmode));

	kmode->clock = mode->Clock;
	kmode->hdisplay = mode->HDisplay;
	kmode->hsync_start = mode->HSyncStart;
	kmode->hsync_end = mode->HSyncEnd;
	kmode->htotal = mode->HTotal;
	kmode->hskew = mode->HSkew;

	kmode->vdisplay = mode->VDisplay;
	kmode->vsync_start = mode->VSyncStart;
	kmode->vsync_end = mode->VSyncEnd;
	kmode->vtotal = mode->VTotal;
	kmode->vscan = mode->VScan;

	kmode->flags = mode->Flags; //& FLAG_BITS;
	if (mode->name)
		strncpy(kmode->name, mode->name, DRM_DISPLAY_MODE_LEN);
	kmode->name[DRM_DISPLAY_MODE_LEN-1] = 0;

}

static void
drmmode_crtc_dpms(xf86CrtcPtr drmmode_crtc, int mode)
{

}

static Bool
drmmode_set_mode_major(xf86CrtcPtr crtc, DisplayModePtr mode,
		       Rotation rotation, int x, int y)
{
	ScrnInfoPtr pScrn = crtc->scrn;
	I830Ptr     pI830 = I830PTR(pScrn);
	xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(crtc->scrn);
	drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
	drmmode_ptr drmmode = drmmode_crtc->drmmode;
	int saved_x, saved_y;
	Rotation saved_rotation;
	DisplayModeRec saved_mode;
	uint32_t *output_ids;
	int output_count = 0;
	int ret = TRUE;
	int i;
	int fb_id;
	drmModeModeInfo kmode;
	unsigned int pitch = pScrn->displayWidth * pI830->cpp;

	if (drmmode->fb_id == 0) {
		ret = drmModeAddFB(drmmode->fd,
				   pScrn->virtualX, pScrn->virtualY,
				   pScrn->depth, pScrn->bitsPerPixel,
				   pitch, pI830->front_buffer->bo->handle,
				   &drmmode->fb_id);
		if (ret < 0) {
			ErrorF("failed to add fb\n");
			return FALSE;
		}
	}

	saved_mode = crtc->mode;
	saved_x = crtc->x;
	saved_y = crtc->y;
	saved_rotation = crtc->rotation;

	crtc->mode = *mode;
	crtc->x = x;
	crtc->y = y;
	crtc->rotation = rotation;
#if XORG_VERSION_CURRENT >= XORG_VERSION_NUMERIC(1,5,99,0,0)
	crtc->transformPresent = FALSE;
#endif

	output_ids = xcalloc(sizeof(uint32_t), xf86_config->num_output);
	if (!output_ids) {
		ret = FALSE;
		goto done;
	}

	for (i = 0; i < xf86_config->num_output; i++) {
		xf86OutputPtr output = xf86_config->output[i];
		drmmode_output_private_ptr drmmode_output;

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

		drmmode_output = output->driver_private;
		output_ids[output_count] =
			drmmode_output->mode_output->connector_id;
		output_count++;
	}

#if XORG_VERSION_CURRENT < XORG_VERSION_NUMERIC(1,5,99,0,0)
	if (!xf86CrtcRotate(crtc, mode, rotation))
		goto done;
#else
	if (!xf86CrtcRotate(crtc))
		goto done;
#endif

	drmmode_ConvertToKMode(crtc->scrn, &kmode, mode);


	fb_id = drmmode->fb_id;
	if (drmmode_crtc->rotate_fb_id)
		fb_id = drmmode_crtc->rotate_fb_id;
	ret = drmModeSetCrtc(drmmode->fd, drmmode_crtc->mode_crtc->crtc_id,
			     fb_id, x, y, output_ids, output_count, &kmode);
	if (ret)
		xf86DrvMsg(crtc->scrn->scrnIndex, X_ERROR,
			   "failed to set mode: %s", strerror(-ret));
	else
		ret = TRUE;

	/* Turn on any outputs on this crtc that may have been disabled */
	for (i = 0; i < xf86_config->num_output; i++) {
		xf86OutputPtr output = xf86_config->output[i];

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

		drmmode_output_dpms(output, DPMSModeOn);
	}

done:
	if (!ret) {
		crtc->x = saved_x;
		crtc->y = saved_y;
		crtc->rotation = saved_rotation;
		crtc->mode = saved_mode;
	}
	return ret;
}

static void
drmmode_set_cursor_colors (xf86CrtcPtr crtc, int bg, int fg)
{

}

static void
drmmode_set_cursor_position (xf86CrtcPtr crtc, int x, int y)
{
	drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
	drmmode_ptr drmmode = drmmode_crtc->drmmode;

	drmModeMoveCursor(drmmode->fd, drmmode_crtc->mode_crtc->crtc_id, x, y);
}

static void
drmmode_load_cursor_argb (xf86CrtcPtr crtc, CARD32 *image)
{
	ScrnInfoPtr pScrn = crtc->scrn;
	I830Ptr pI830 = I830PTR(pScrn);
	int ret;

	/* cursor should be mapped already */
	ret = dri_bo_subdata(pI830->cursor_mem->bo, 0, 64*64*4, image);
	if (ret)
		xf86DrvMsg(crtc->scrn->scrnIndex, X_ERROR,
			   "failed to set cursor: %s", strerror(-ret));

	return;
}


static void
drmmode_hide_cursor (xf86CrtcPtr crtc)
{
	drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
	drmmode_ptr drmmode = drmmode_crtc->drmmode;

	drmModeSetCursor(drmmode->fd, drmmode_crtc->mode_crtc->crtc_id,
			 0, 64, 64);
}

static void
drmmode_show_cursor (xf86CrtcPtr crtc)
{
	drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
	drmmode_ptr drmmode = drmmode_crtc->drmmode;
	ScrnInfoPtr pScrn = crtc->scrn;
	I830Ptr pI830 = I830PTR(pScrn);

	drmModeSetCursor(drmmode->fd, drmmode_crtc->mode_crtc->crtc_id,
			 pI830->cursor_mem->bo->handle, 64, 64);
}

static void *
drmmode_crtc_shadow_allocate(xf86CrtcPtr crtc, int width, int height)
{
	ScrnInfoPtr pScrn = crtc->scrn;
	I830Ptr pI830 = I830PTR(pScrn);
	drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
	drmmode_ptr drmmode = drmmode_crtc->drmmode;
	int size, ret;
	unsigned long rotate_pitch;

	width = i830_pad_drawable_width(width, drmmode->cpp);
	rotate_pitch = width * drmmode->cpp;
	size = rotate_pitch * height;

	drmmode_crtc->rotate_bo =
		drm_intel_bo_alloc(pI830->bufmgr, "rotate", size, 4096);

	if (!drmmode_crtc->rotate_bo) {
		xf86DrvMsg(crtc->scrn->scrnIndex, X_ERROR,
			   "Couldn't allocate shadow memory for rotated CRTC\n");
		return NULL;
	}

	drm_intel_gem_bo_map_gtt(drmmode_crtc->rotate_bo);

	ret = drmModeAddFB(drmmode->fd, width, height, crtc->scrn->depth,
			   crtc->scrn->bitsPerPixel, rotate_pitch,
			   drmmode_crtc->rotate_bo->handle,
			   &drmmode_crtc->rotate_fb_id);
	if (ret) {
		ErrorF("failed to add rotate fb\n");
		drm_intel_bo_unreference(drmmode_crtc->rotate_bo);
		return NULL;
	}

	return drmmode_crtc->rotate_bo->virtual;
}

static PixmapPtr
drmmode_crtc_shadow_create(xf86CrtcPtr crtc, void *data, int width, int height)
{
	ScrnInfoPtr pScrn = crtc->scrn;
	drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
	drmmode_ptr drmmode = drmmode_crtc->drmmode;
	unsigned long rotate_pitch;
	PixmapPtr rotate_pixmap;

	if (!data)
		data = drmmode_crtc_shadow_allocate (crtc, width, height);

	rotate_pitch =
		i830_pad_drawable_width(width, drmmode->cpp) * drmmode->cpp;
	rotate_pixmap = GetScratchPixmapHeader(pScrn->pScreen,
					       width, height,
					       pScrn->depth,
					       pScrn->bitsPerPixel,
					       rotate_pitch,
					       data);

	if (rotate_pixmap == NULL) {
		xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
			   "Couldn't allocate shadow pixmap for rotated CRTC\n");
	}

	if (drmmode_crtc->rotate_bo)
		i830_set_pixmap_bo(rotate_pixmap, drmmode_crtc->rotate_bo);

	return rotate_pixmap;
}

static void
drmmode_crtc_shadow_destroy(xf86CrtcPtr crtc, PixmapPtr rotate_pixmap, void *data)
{
	drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
	drmmode_ptr drmmode = drmmode_crtc->drmmode;

	if (rotate_pixmap)
		FreeScratchPixmapHeader(rotate_pixmap);


	if (data) {
		/* Be sure to sync acceleration before the memory gets
		 * unbound. */
		drmModeRmFB(drmmode->fd, drmmode_crtc->rotate_fb_id);
		drmmode_crtc->rotate_fb_id = 0;
		drm_intel_gem_bo_unmap_gtt(drmmode_crtc->rotate_bo);
		dri_bo_unreference(drmmode_crtc->rotate_bo);
		drmmode_crtc->rotate_bo = NULL;
	}
}

static void
drmmode_crtc_gamma_set(xf86CrtcPtr crtc,
		       CARD16 *red, CARD16 *green, CARD16 *blue, int size)
{
	drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
	drmmode_ptr drmmode = drmmode_crtc->drmmode;

	drmModeCrtcSetGamma(drmmode->fd, drmmode_crtc->mode_crtc->crtc_id,
			    size, red, green, blue);
}

static const xf86CrtcFuncsRec drmmode_crtc_funcs = {
	.dpms = drmmode_crtc_dpms,
	.set_mode_major = drmmode_set_mode_major,
	.set_cursor_colors = drmmode_set_cursor_colors,
	.set_cursor_position = drmmode_set_cursor_position,
	.show_cursor = drmmode_show_cursor,
	.hide_cursor = drmmode_hide_cursor,
	.load_cursor_argb = drmmode_load_cursor_argb,
	.shadow_create = drmmode_crtc_shadow_create,
	.shadow_allocate = drmmode_crtc_shadow_allocate,
	.shadow_destroy = drmmode_crtc_shadow_destroy,
	.gamma_set = drmmode_crtc_gamma_set,
	.destroy = NULL, /* XXX */
};


static void
drmmode_crtc_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int num)
{
	xf86CrtcPtr crtc;
	drmmode_crtc_private_ptr drmmode_crtc;

	crtc = xf86CrtcCreate(pScrn, &drmmode_crtc_funcs);
	if (crtc == NULL)
		return;

	drmmode_crtc = xnfcalloc(sizeof(drmmode_crtc_private_rec), 1);
	drmmode_crtc->mode_crtc = drmModeGetCrtc(drmmode->fd,
						 drmmode->mode_res->crtcs[num]);
	drmmode_crtc->drmmode = drmmode;
	crtc->driver_private = drmmode_crtc;

	return;
}

static xf86OutputStatus
drmmode_output_detect(xf86OutputPtr output)
{
	/* go to the hw and retrieve a new output struct */
	drmmode_output_private_ptr drmmode_output = output->driver_private;
	drmmode_ptr drmmode = drmmode_output->drmmode;
	xf86OutputStatus status;
	drmModeFreeConnector(drmmode_output->mode_output);

	drmmode_output->mode_output =
		drmModeGetConnector(drmmode->fd, drmmode_output->output_id);

	switch (drmmode_output->mode_output->connection) {
	case DRM_MODE_CONNECTED:
		status = XF86OutputStatusConnected;
		break;
	case DRM_MODE_DISCONNECTED:
		status = XF86OutputStatusDisconnected;
		break;
	default:
	case DRM_MODE_UNKNOWNCONNECTION:
		status = XF86OutputStatusUnknown;
		break;
	}
	return status;
}

static Bool
drmmode_output_mode_valid(xf86OutputPtr output, DisplayModePtr pModes)
{
	return MODE_OK;
}

static DisplayModePtr
drmmode_output_get_modes(xf86OutputPtr output)
{
	drmmode_output_private_ptr drmmode_output = output->driver_private;
	drmModeConnectorPtr koutput = drmmode_output->mode_output;
	drmmode_ptr drmmode = drmmode_output->drmmode;
	int i;
	DisplayModePtr Modes = NULL, Mode;
	drmModePropertyPtr props;

	/* look for an EDID property */
	for (i = 0; i < koutput->count_props; i++) {
		props = drmModeGetProperty(drmmode->fd, koutput->props[i]);
		if (!props || !(props->flags & DRM_MODE_PROP_BLOB))
			continue;

		if (!strcmp(props->name, "EDID") &&
		    drmmode_output->edid_blob == NULL) {
			drmModeFreePropertyBlob(drmmode_output->edid_blob);
			drmmode_output->edid_blob =
				drmModeGetPropertyBlob(drmmode->fd,
						       koutput->prop_values[i]);
		}
		drmModeFreeProperty(props);
	}

	if (drmmode_output->edid_blob)
		xf86OutputSetEDID(output,
				  xf86InterpretEDID(output->scrn->scrnIndex,
						    drmmode_output->edid_blob->data));
	else
		xf86OutputSetEDID(output,
				  xf86InterpretEDID(output->scrn->scrnIndex,
						    NULL));

	/* modes should already be available */
	for (i = 0; i < koutput->count_modes; i++) {
		Mode = xnfalloc(sizeof(DisplayModeRec));

		drmmode_ConvertFromKMode(output->scrn, &koutput->modes[i],
					 Mode);
		Modes = xf86ModesAdd(Modes, Mode);

	}
	return Modes;
}

static void
drmmode_output_destroy(xf86OutputPtr output)
{
	drmmode_output_private_ptr drmmode_output = output->driver_private;
	int i;

	if (drmmode_output->edid_blob)
		drmModeFreePropertyBlob(drmmode_output->edid_blob);
	for (i = 0; i < drmmode_output->num_props; i++) {
	    drmModeFreeProperty(drmmode_output->props[i].mode_prop);
	    xfree(drmmode_output->props[i].atoms);
	}
	xfree(drmmode_output->props);
	drmModeFreeConnector(drmmode_output->mode_output);
	xfree(drmmode_output);
	output->driver_private = NULL;
}

static void
drmmode_output_dpms(xf86OutputPtr output, int mode)
{
	drmmode_output_private_ptr drmmode_output = output->driver_private;
	drmModeConnectorPtr koutput = drmmode_output->mode_output;
	drmmode_ptr drmmode = drmmode_output->drmmode;
	int i;
	drmModePropertyPtr props;

	for (i = 0; i < koutput->count_props; i++) {
		props = drmModeGetProperty(drmmode->fd, koutput->props[i]);
		if (!props)
			continue;

		if (!strcmp(props->name, "DPMS")) {
                        drmModeConnectorSetProperty(drmmode->fd,
                                drmmode_output->output_id,
                                props->prop_id,
                                mode);
                        drmModeFreeProperty(props);
                        return;
		}
		drmModeFreeProperty(props);
	}
}

static Bool
drmmode_property_ignore(drmModePropertyPtr prop)
{
    if (!prop)
	return TRUE;
    /* ignore blob prop */
    if (prop->flags & DRM_MODE_PROP_BLOB)
	return TRUE;
    /* ignore standard property */
    if (!strcmp(prop->name, "EDID") ||
	    !strcmp(prop->name, "DPMS"))
	return TRUE;

    return FALSE;
}

static void
drmmode_output_create_resources(xf86OutputPtr output)
{
    drmmode_output_private_ptr drmmode_output = output->driver_private;
    drmModeConnectorPtr mode_output = drmmode_output->mode_output;
    drmmode_ptr drmmode = drmmode_output->drmmode;
    drmModePropertyPtr drmmode_prop;
    int i, j, err;

    drmmode_output->props = xcalloc(mode_output->count_props, sizeof(drmmode_prop_rec));
    if (!drmmode_output->props)
	return;

    drmmode_output->num_props = 0;
    for (i = 0, j = 0; i < mode_output->count_props; i++) {
	drmmode_prop = drmModeGetProperty(drmmode->fd, mode_output->props[i]);
	if (drmmode_property_ignore(drmmode_prop)) {
	    drmModeFreeProperty(drmmode_prop);
	    continue;
	}
	drmmode_output->props[j].mode_prop = drmmode_prop;
	drmmode_output->props[j].value = mode_output->prop_values[i];
	drmmode_output->num_props++;
	j++;
    }

    for (i = 0; i < drmmode_output->num_props; i++) {
	drmmode_prop_ptr p = &drmmode_output->props[i];
	drmmode_prop = p->mode_prop;

	if (drmmode_prop->flags & DRM_MODE_PROP_RANGE) {
	    INT32 range[2];

	    p->num_atoms = 1;
	    p->atoms = xcalloc(p->num_atoms, sizeof(Atom));
	    if (!p->atoms)
		continue;
	    p->atoms[0] = MakeAtom(drmmode_prop->name, strlen(drmmode_prop->name), TRUE);
	    range[0] = drmmode_prop->values[0];
	    range[1] = drmmode_prop->values[1];
	    err = RRConfigureOutputProperty(output->randr_output, p->atoms[0],
		    FALSE, TRUE,
		    drmmode_prop->flags & DRM_MODE_PROP_IMMUTABLE ? TRUE : FALSE,
		    2, range);
	    if (err != 0) {
		xf86DrvMsg(output->scrn->scrnIndex, X_ERROR,
			"RRConfigureOutputProperty error, %d\n", err);
	    }
	    err = RRChangeOutputProperty(output->randr_output, p->atoms[0],
		    XA_INTEGER, 32, PropModeReplace, 1, &p->value, FALSE, TRUE);
	    if (err != 0) {
		xf86DrvMsg(output->scrn->scrnIndex, X_ERROR,
			"RRChangeOutputProperty error, %d\n", err);
	    }
	} else if (drmmode_prop->flags & DRM_MODE_PROP_ENUM) {
	    p->num_atoms = drmmode_prop->count_enums + 1;
	    p->atoms = xcalloc(p->num_atoms, sizeof(Atom));
	    if (!p->atoms)
		continue;
	    p->atoms[0] = MakeAtom(drmmode_prop->name, strlen(drmmode_prop->name), TRUE);
	    for (j = 1; j <= drmmode_prop->count_enums; j++) {
		struct drm_mode_property_enum *e = &drmmode_prop->enums[j-1];
		p->atoms[j] = MakeAtom(e->name, strlen(e->name), TRUE);
	    }
	    err = RRConfigureOutputProperty(output->randr_output, p->atoms[0],
		    FALSE, FALSE,
		    drmmode_prop->flags & DRM_MODE_PROP_IMMUTABLE ? TRUE : FALSE,
		    p->num_atoms - 1, (INT32 *)&p->atoms[1]);
	    if (err != 0) {
		xf86DrvMsg(output->scrn->scrnIndex, X_ERROR,
			"RRConfigureOutputProperty error, %d\n", err);
	    }
	    for (j = 0; j < drmmode_prop->count_enums; j++)
		if (drmmode_prop->enums[j].value == p->value)
		    break;
	    /* there's always a matching value */
	    err = RRChangeOutputProperty(output->randr_output, p->atoms[0],
		    XA_ATOM, 32, PropModeReplace, 1, &p->atoms[j+1], FALSE, TRUE);
	    if (err != 0) {
		xf86DrvMsg(output->scrn->scrnIndex, X_ERROR,
			"RRChangeOutputProperty error, %d\n", err);
	    }
	}
    }
}

static Bool
drmmode_output_set_property(xf86OutputPtr output, Atom property,
		RRPropertyValuePtr value)
{
    drmmode_output_private_ptr drmmode_output = output->driver_private;
    drmmode_ptr drmmode = drmmode_output->drmmode;
    int i;

    for (i = 0; i < drmmode_output->num_props; i++) {
	drmmode_prop_ptr p = &drmmode_output->props[i];

	if (p->atoms[0] != property)
	    continue;

	if (p->mode_prop->flags & DRM_MODE_PROP_RANGE) {
	    uint32_t val;

	    if (value->type != XA_INTEGER || value->format != 32 ||
		    value->size != 1)
		return FALSE;
	    val = *(uint32_t *)value->data;

	    drmModeConnectorSetProperty(drmmode->fd, drmmode_output->output_id,
		    p->mode_prop->prop_id, (uint64_t)val);
	    return TRUE;
	} else if (p->mode_prop->flags & DRM_MODE_PROP_ENUM) {
	    Atom	atom;
	    const char	*name;
	    int		j;

	    if (value->type != XA_ATOM || value->format != 32 || value->size != 1)
		return FALSE;
	    memcpy(&atom, value->data, 4);
	    name = NameForAtom(atom);

	    /* search for matching name string, then set its value down */
	    for (j = 0; j < p->mode_prop->count_enums; j++) {
		if (!strcmp(p->mode_prop->enums[j].name, name)) {
		    drmModeConnectorSetProperty(drmmode->fd, drmmode_output->output_id,
			    p->mode_prop->prop_id, p->mode_prop->enums[j].value);
		    return TRUE;
		}
	    }
	}
    }
    /* no property found? */
    return FALSE;
}

static const xf86OutputFuncsRec drmmode_output_funcs = {
	.create_resources = drmmode_output_create_resources,
#ifdef RANDR_12_INTERFACE
	.set_property = drmmode_output_set_property,
#endif
	.dpms = drmmode_output_dpms,
#if 0

	.save = drmmode_crt_save,
	.restore = drmmode_crt_restore,
	.mode_fixup = drmmode_crt_mode_fixup,
	.prepare = drmmode_output_prepare,
	.mode_set = drmmode_crt_mode_set,
	.commit = drmmode_output_commit,
#endif
	.detect = drmmode_output_detect,
	.mode_valid = drmmode_output_mode_valid,

	.get_modes = drmmode_output_get_modes,
	.destroy = drmmode_output_destroy
};

static int subpixel_conv_table[7] = { 0, SubPixelUnknown,
				      SubPixelHorizontalRGB,
				      SubPixelHorizontalBGR,
				      SubPixelVerticalRGB,
				      SubPixelVerticalBGR,
				      SubPixelNone };

static const char *output_names[] = { "None",
				      "VGA",
				      "DVI",
				      "DVI",
				      "DVI",
				      "Composite",
				      "TV",
				      "LVDS",
				      "CTV",
				      "DIN",
				      "DP",
				      "HDMI",
				      "HDMI",
};


static void
drmmode_output_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int num)
{
	xf86OutputPtr output;
	drmModeConnectorPtr koutput;
	drmModeEncoderPtr kencoder;
	drmmode_output_private_ptr drmmode_output;
	char name[32];

	koutput = drmModeGetConnector(drmmode->fd,
				      drmmode->mode_res->connectors[num]);
	if (!koutput)
		return;

	kencoder = drmModeGetEncoder(drmmode->fd, koutput->encoders[0]);
	if (!kencoder) {
		drmModeFreeConnector(koutput);
		return;
	}

	snprintf(name, 32, "%s%d", output_names[koutput->connector_type],
		 koutput->connector_type_id);

	output = xf86OutputCreate (pScrn, &drmmode_output_funcs, name);
	if (!output) {
		drmModeFreeEncoder(kencoder);
		drmModeFreeConnector(koutput);
		return;
	}

	drmmode_output = xcalloc(sizeof(drmmode_output_private_rec), 1);
	if (!drmmode_output) {
		xf86OutputDestroy(output);
		drmModeFreeConnector(koutput);
		drmModeFreeEncoder(kencoder);
		return;
	}

	drmmode_output->output_id = drmmode->mode_res->connectors[num];
	drmmode_output->mode_output = koutput;
	drmmode_output->mode_encoder = kencoder;
	drmmode_output->drmmode = drmmode;
	output->mm_width = koutput->mmWidth;
	output->mm_height = koutput->mmHeight;

	output->subpixel_order = subpixel_conv_table[koutput->subpixel];
	output->driver_private = drmmode_output;

	output->possible_crtcs = kencoder->possible_crtcs;
	output->possible_clones = kencoder->possible_clones;
	return;
}

static Bool
drmmode_xf86crtc_resize (ScrnInfoPtr scrn, int width, int height)
{
	xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
	drmmode_crtc_private_ptr
		    drmmode_crtc = xf86_config->crtc[0]->driver_private;
	drmmode_ptr drmmode = drmmode_crtc->drmmode;
	I830Ptr     pI830 = I830PTR(scrn);
	i830_memory *old_front = NULL;
	Bool	    tiled, ret;
	ScreenPtr   screen = screenInfo.screens[scrn->scrnIndex];
	uint32_t    old_fb_id;
	int	    i, pitch, old_width, old_height, old_pitch;

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

	pitch = i830_pad_drawable_width(width, pI830->cpp);
	tiled = i830_tiled_width(pI830, &pitch, pI830->cpp);
	xf86DrvMsg(scrn->scrnIndex, X_INFO,
		   "Allocate new frame buffer %dx%d stride %d\n",
		   width, height, pitch);

	old_width = scrn->virtualX;
	old_height = scrn->virtualY;
	old_pitch = scrn->displayWidth;
	old_fb_id = drmmode->fb_id;
	old_front = pI830->front_buffer;

	scrn->virtualX = width;
	scrn->virtualY = height;
	scrn->displayWidth = pitch;
	pI830->front_buffer = i830_allocate_framebuffer(scrn);
	if (!pI830->front_buffer)
		goto fail;

	ret = drmModeAddFB(drmmode->fd, width, height, scrn->depth,
			   scrn->bitsPerPixel, pitch * pI830->cpp,
			   pI830->front_buffer->bo->handle,
			   &drmmode->fb_id);
	if (ret)
		goto fail;

	i830_set_pixmap_bo(screen->GetScreenPixmap(screen), pI830->front_buffer->bo);
	scrn->fbOffset = pI830->front_buffer->offset;

	screen->ModifyPixmapHeader(screen->GetScreenPixmap(screen),
				   width, height, -1, -1, pitch * pI830->cpp, NULL);
	xf86DrvMsg(scrn->scrnIndex, X_INFO, "New front buffer at 0x%lx\n",
		   pI830->front_buffer->offset);

	for (i = 0; i < xf86_config->num_crtc; i++) {
		xf86CrtcPtr crtc = xf86_config->crtc[i];

		if (!crtc->enabled)
			continue;

		drmmode_set_mode_major(crtc, &crtc->mode,
				       crtc->rotation, crtc->x, crtc->y);
	}

	if (old_fb_id)
		drmModeRmFB(drmmode->fd, old_fb_id);
	if (old_front)
		i830_free_memory(scrn, old_front);

	return TRUE;

 fail:
	if (pI830->front_buffer)
		i830_free_memory(scrn, pI830->front_buffer);
	pI830->front_buffer = old_front;
	scrn->virtualX = old_width;
	scrn->virtualY = old_height;
	scrn->displayWidth = old_pitch;
	drmmode->fb_id = old_fb_id;

	return FALSE;
}

static const xf86CrtcConfigFuncsRec drmmode_xf86crtc_config_funcs = {
	drmmode_xf86crtc_resize
};

Bool drmmode_pre_init(ScrnInfoPtr pScrn, int fd, int cpp)
{
	xf86CrtcConfigPtr   xf86_config;
	drmmode_ptr drmmode;
	int i;

	drmmode = xnfalloc(sizeof *drmmode);
	drmmode->fd = fd;
	drmmode->fb_id = 0;

	xf86CrtcConfigInit(pScrn, &drmmode_xf86crtc_config_funcs);
	xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);

	drmmode->cpp = cpp;
	drmmode->mode_res = drmModeGetResources(drmmode->fd);
	if (!drmmode->mode_res)
		return FALSE;

	xf86CrtcSetSizeRange(pScrn, 320, 200, drmmode->mode_res->max_width,
			     drmmode->mode_res->max_height);
	for (i = 0; i < drmmode->mode_res->count_crtcs; i++)
		drmmode_crtc_init(pScrn, drmmode, i);

	for (i = 0; i < drmmode->mode_res->count_connectors; i++)
		drmmode_output_init(pScrn, drmmode, i);

	xf86InitialConfiguration(pScrn, TRUE);

	return TRUE;
}