static bool radeon_atom_apply_quirks(struct drm_device *dev,
				     uint32_t supported_device,
				     int *connector_type,
				     struct radeon_i2c_bus_rec *i2c_bus,
				     uint16_t *line_mux,
				     struct radeon_hpd *hpd)
{

	/* Asus M2A-VM HDMI board lists the DVI port as HDMI */
	if ((dev->pdev->device == 0x791e) &&
	    (dev->pdev->subsystem_vendor == 0x1043) &&
	    (dev->pdev->subsystem_device == 0x826d)) {
		if ((*connector_type == DRM_MODE_CONNECTOR_HDMIA) &&
		    (supported_device == ATOM_DEVICE_DFP3_SUPPORT))
			*connector_type = DRM_MODE_CONNECTOR_DVID;
	}

	/* Asrock RS600 board lists the DVI port as HDMI */
	if ((dev->pdev->device == 0x7941) &&
	    (dev->pdev->subsystem_vendor == 0x1849) &&
	    (dev->pdev->subsystem_device == 0x7941)) {
		if ((*connector_type == DRM_MODE_CONNECTOR_HDMIA) &&
		    (supported_device == ATOM_DEVICE_DFP3_SUPPORT))
			*connector_type = DRM_MODE_CONNECTOR_DVID;
	}

	/* a-bit f-i90hd - ciaranm on #radeonhd - this board has no DVI */
	if ((dev->pdev->device == 0x7941) &&
	    (dev->pdev->subsystem_vendor == 0x147b) &&
	    (dev->pdev->subsystem_device == 0x2412)) {
		if (*connector_type == DRM_MODE_CONNECTOR_DVII)
			return false;
	}

	/* Falcon NW laptop lists vga ddc line for LVDS */
	if ((dev->pdev->device == 0x5653) &&
	    (dev->pdev->subsystem_vendor == 0x1462) &&
	    (dev->pdev->subsystem_device == 0x0291)) {
		if (*connector_type == DRM_MODE_CONNECTOR_LVDS) {
			i2c_bus->valid = false;
			*line_mux = 53;
		}
	}

	/* HIS X1300 is DVI+VGA, not DVI+DVI */
	if ((dev->pdev->device == 0x7146) &&
	    (dev->pdev->subsystem_vendor == 0x17af) &&
	    (dev->pdev->subsystem_device == 0x2058)) {
		if (supported_device == ATOM_DEVICE_DFP1_SUPPORT)
			return false;
	}

	/* Gigabyte X1300 is DVI+VGA, not DVI+DVI */
	if ((dev->pdev->device == 0x7142) &&
	    (dev->pdev->subsystem_vendor == 0x1458) &&
	    (dev->pdev->subsystem_device == 0x2134)) {
		if (supported_device == ATOM_DEVICE_DFP1_SUPPORT)
			return false;
	}


	/* Funky macbooks */
	if ((dev->pdev->device == 0x71C5) &&
	    (dev->pdev->subsystem_vendor == 0x106b) &&
	    (dev->pdev->subsystem_device == 0x0080)) {
		if ((supported_device == ATOM_DEVICE_CRT1_SUPPORT) ||
		    (supported_device == ATOM_DEVICE_DFP2_SUPPORT))
			return false;
		if (supported_device == ATOM_DEVICE_CRT2_SUPPORT)
			*line_mux = 0x90;
	}

	/* ASUS HD 3600 XT board lists the DVI port as HDMI */
	if ((dev->pdev->device == 0x9598) &&
	    (dev->pdev->subsystem_vendor == 0x1043) &&
	    (dev->pdev->subsystem_device == 0x01da)) {
		if (*connector_type == DRM_MODE_CONNECTOR_HDMIA) {
			*connector_type = DRM_MODE_CONNECTOR_DVII;
		}
	}

	/* ASUS HD 3450 board lists the DVI port as HDMI */
	if ((dev->pdev->device == 0x95C5) &&
	    (dev->pdev->subsystem_vendor == 0x1043) &&
	    (dev->pdev->subsystem_device == 0x01e2)) {
		if (*connector_type == DRM_MODE_CONNECTOR_HDMIA) {
			*connector_type = DRM_MODE_CONNECTOR_DVII;
		}
	}

	/* some BIOSes seem to report DAC on HDMI - usually this is a board with
	 * HDMI + VGA reporting as HDMI
	 */
	if (*connector_type == DRM_MODE_CONNECTOR_HDMIA) {
		if (supported_device & (ATOM_DEVICE_CRT_SUPPORT)) {
			*connector_type = DRM_MODE_CONNECTOR_VGA;
			*line_mux = 0;
		}
	}

	/* Acer laptop reports DVI-D as DVI-I */
	if ((dev->pdev->device == 0x95c4) &&
	    (dev->pdev->subsystem_vendor == 0x1025) &&
	    (dev->pdev->subsystem_device == 0x013c)) {
		if ((*connector_type == DRM_MODE_CONNECTOR_DVII) &&
		    (supported_device == ATOM_DEVICE_DFP1_SUPPORT))
			*connector_type = DRM_MODE_CONNECTOR_DVID;
	}

	/* XFX Pine Group device rv730 reports no VGA DDC lines
	 * even though they are wired up to record 0x93
	 */
	if ((dev->pdev->device == 0x9498) &&
	    (dev->pdev->subsystem_vendor == 0x1682) &&
	    (dev->pdev->subsystem_device == 0x2452)) {
		struct radeon_device *rdev = dev->dev_private;
		*i2c_bus = radeon_lookup_i2c_gpio(rdev, 0x93);
	}
	return true;
}