Something

   i830_sdvo_get_capabilities(output, &dev_priv->caps);

    memset(&dev_priv->active_outputs, 0, sizeof(dev_priv->active_outputs));
    if (dev_priv->caps.output_flags & SDVO_OUTPUT_TMDS0)
    {
	dev_priv->active_outputs = SDVO_OUTPUT_TMDS0;
        output->subpixel_order = SubPixelHorizontalRGB;
	name_prefix="TMDS";
    }
    else if (dev_priv->caps.output_flags & SDVO_OUTPUT_TMDS1)
    {
	dev_priv->active_outputs = SDVO_OUTPUT_TMDS1;
        output->subpixel_order = SubPixelHorizontalRGB;
	name_prefix="TMDS";
    }
	else if (dev_priv->caps.output_flags & SDVO_OUTPUT_LVDS0)
    {
	dev_priv->active_outputs = SDVO_OUTPUT_TMDS1;
        output->subpixel_order = SubPixelHorizontalRGB;
	name_prefix="LVDS";
    }
	else if (dev_priv->caps.output_flags & SDVO_OUTPUT_LVDS1)
    {
	dev_priv->active_outputs = SDVO_OUTPUT_TMDS1;
        output->subpixel_order = SubPixelHorizontalRGB;
	name_prefix="LVDS";
    }
    else if (dev_priv->caps.output_flags & SDVO_OUTPUT_RGB0)
    {
	dev_priv->active_outputs = SDVO_OUTPUT_RGB0;
        output->subpixel_order = SubPixelHorizontalRGB;
	name_prefix="VGA";
    }
    else if (dev_priv->caps.output_flags & SDVO_OUTPUT_RGB1)
    {
	dev_priv->active_outputs = SDVO_OUTPUT_RGB1;
        output->subpixel_order = SubPixelHorizontalRGB;
	name_prefix="VGA";
    }
    else
    {
	unsigned char	bytes[2];

	memcpy (bytes, &dev_priv->caps.output_flags, 2);
	xf86DrvMsg(intel_output->pI2CBus->scrnIndex, X_ERROR,
		   "%s: No active TMDS outputs (0x%02x%02x)\n",
		   SDVO_NAME(dev_priv),
		   bytes[0], bytes[1]);
	name_prefix="Unknown";
    }