drivers/gpu/drm/radeon/radeon_connectors.c

/*
 * Copyright 2007-8 Advanced Micro Devices, Inc.
 * Copyright 2008 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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
 *          Alex Deucher
 */
#include "drmP.h"
#include "drm_edid.h"
#include "drm_crtc_helper.h"
#include "drm_fb_helper.h"
#include "radeon_drm.h"
#include "radeon.h"
#include "atom.h"

extern void
radeon_combios_connected_scratch_regs(struct drm_connector *connector,
				      struct drm_encoder *encoder,
				      bool connected);
extern void
radeon_atombios_connected_scratch_regs(struct drm_connector *connector,
				       struct drm_encoder *encoder,
				       bool connected);

void radeon_connector_hotplug(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);

	if (radeon_connector->hpd.hpd != RADEON_HPD_NONE)
		radeon_hpd_set_polarity(rdev, radeon_connector->hpd.hpd);

	if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
		if (radeon_dp_getsinktype(radeon_connector) == CONNECTOR_OBJECT_ID_DISPLAYPORT) {
			if (radeon_dp_needs_link_train(radeon_connector)) {
				if (connector->encoder)
					dp_link_train(connector->encoder, connector);
			}
		}
	}

}

static void radeon_property_change_mode(struct drm_encoder *encoder)
{
	struct drm_crtc *crtc = encoder->crtc;

	if (crtc && crtc->enabled) {
		drm_crtc_helper_set_mode(crtc, &crtc->mode,
					 crtc->x, crtc->y, crtc->fb);
	}
}
static void
radeon_connector_update_scratch_regs(struct drm_connector *connector, enum drm_connector_status status)
{
	struct drm_device *dev = connector->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct drm_encoder *best_encoder = NULL;
	struct drm_encoder *encoder = NULL;
	struct drm_connector_helper_funcs *connector_funcs = connector->helper_private;
	struct drm_mode_object *obj;
	bool connected;
	int i;

	best_encoder = connector_funcs->best_encoder(connector);

	for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
		if (connector->encoder_ids[i] == 0)
			break;

		obj = drm_mode_object_find(connector->dev,
					   connector->encoder_ids[i],
					   DRM_MODE_OBJECT_ENCODER);
		if (!obj)
			continue;

		encoder = obj_to_encoder(obj);

		if ((encoder == best_encoder) && (status == connector_status_connected))
			connected = true;
		else
			connected = false;

		if (rdev->is_atom_bios)
			radeon_atombios_connected_scratch_regs(connector, encoder, connected);
		else
			radeon_combios_connected_scratch_regs(connector, encoder, connected);

	}
}

struct drm_encoder *radeon_find_encoder(struct drm_connector *connector, int encoder_type)
{
	struct drm_mode_object *obj;
	struct drm_encoder *encoder;
	int i;

	for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
		if (connector->encoder_ids[i] == 0)
			break;

		obj = drm_mode_object_find(connector->dev, connector->encoder_ids[i], DRM_MODE_OBJECT_ENCODER);
		if (!obj)
			continue;

		encoder = obj_to_encoder(obj);
		if (encoder->encoder_type == encoder_type)
			return encoder;
	}
	return NULL;
}

struct drm_encoder *radeon_best_single_encoder(struct drm_connector *connector)
{
	int enc_id = connector->encoder_ids[0];
	struct drm_mode_object *obj;
	struct drm_encoder *encoder;

	/* pick the encoder ids */
	if (enc_id) {
		obj = drm_mode_object_find(connector->dev, enc_id, DRM_MODE_OBJECT_ENCODER);
		if (!obj)
			return NULL;
		encoder = obj_to_encoder(obj);
		return encoder;
	}
	return NULL;
}

/*
 * radeon_connector_analog_encoder_conflict_solve
 * - search for other connectors sharing this encoder
 *   if priority is true, then set them disconnected if this is connected
 *   if priority is false, set us disconnected if they are connected
 */
static enum drm_connector_status
radeon_connector_analog_encoder_conflict_solve(struct drm_connector *connector,
					       struct drm_encoder *encoder,
					       enum drm_connector_status current_status,
					       bool priority)
{
	struct drm_device *dev = connector->dev;
	struct drm_connector *conflict;
	int i;

	list_for_each_entry(conflict, &dev->mode_config.connector_list, head) {
		if (conflict == connector)
			continue;

		for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
			if (conflict->encoder_ids[i] == 0)
				break;

			/* if the IDs match */
			if (conflict->encoder_ids[i] == encoder->base.id) {
				if (conflict->status != connector_status_connected)
					continue;

				if (priority == true) {
					DRM_INFO("1: conflicting encoders switching off %s\n", drm_get_connector_name(conflict));
					DRM_INFO("in favor of %s\n", drm_get_connector_name(connector));
					conflict->status = connector_status_disconnected;
					radeon_connector_update_scratch_regs(conflict, connector_status_disconnected);
				} else {
					DRM_INFO("2: conflicting encoders switching off %s\n", drm_get_connector_name(connector));
					DRM_INFO("in favor of %s\n", drm_get_connector_name(conflict));
					current_status = connector_status_disconnected;
				}
				break;
			}
		}
	}
	return current_status;

}

static struct drm_display_mode *radeon_fp_native_mode(struct drm_encoder *encoder)
{
	struct drm_device *dev = encoder->dev;
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	struct drm_display_mode *mode = NULL;
	struct drm_display_mode *native_mode = &radeon_encoder->native_mode;

	if (native_mode->hdisplay != 0 &&
	    native_mode->vdisplay != 0 &&
	    native_mode->clock != 0) {
		mode = drm_mode_duplicate(dev, native_mode);
		mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
		drm_mode_set_name(mode);

		DRM_DEBUG("Adding native panel mode %s\n", mode->name);
	}
	return mode;
}

static void radeon_add_common_modes(struct drm_encoder *encoder, struct drm_connector *connector)
{
	struct drm_device *dev = encoder->dev;
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	struct drm_display_mode *mode = NULL;
	struct drm_display_mode *native_mode = &radeon_encoder->native_mode;
	int i;
	struct mode_size {
		int w;
		int h;
	} common_modes[17] = {
		{ 640,  480},
		{ 720,  480},
		{ 800,  600},
		{ 848,  480},
		{1024,  768},
		{1152,  768},
		{1280,  720},
		{1280,  800},
		{1280,  854},
		{1280,  960},
		{1280, 1024},
		{1440,  900},
		{1400, 1050},
		{1680, 1050},
		{1600, 1200},
		{1920, 1080},
		{1920, 1200}
	};

	for (i = 0; i < 17; i++) {
		if (radeon_encoder->devices & (ATOM_DEVICE_TV_SUPPORT)) {
			if (common_modes[i].w > 1024 ||
			    common_modes[i].h > 768)
				continue;
		}
		if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) {
			if (common_modes[i].w > native_mode->hdisplay ||
			    common_modes[i].h > native_mode->vdisplay ||
			    (common_modes[i].w == native_mode->hdisplay &&
			     common_modes[i].h == native_mode->vdisplay))
				continue;
		}
		if (common_modes[i].w < 320 || common_modes[i].h < 200)
			continue;

		mode = drm_cvt_mode(dev, common_modes[i].w, common_modes[i].h, 60, false, false, false);
		drm_mode_probed_add(connector, mode);
	}
}

int radeon_connector_set_property(struct drm_connector *connector, struct drm_property *property,
				  uint64_t val)
{
	struct drm_device *dev = connector->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct drm_encoder *encoder;
	struct radeon_encoder *radeon_encoder;

	if (property == rdev->mode_info.coherent_mode_property) {
		struct radeon_encoder_atom_dig *dig;

		/* need to find digital encoder on connector */
		encoder = radeon_find_encoder(connector, DRM_MODE_ENCODER_TMDS);
		if (!encoder)
			return 0;

		radeon_encoder = to_radeon_encoder(encoder);

		if (!radeon_encoder->enc_priv)
			return 0;

		dig = radeon_encoder->enc_priv;
		dig->coherent_mode = val ? true : false;
		radeon_property_change_mode(&radeon_encoder->base);
	}

	if (property == rdev->mode_info.tv_std_property) {
		encoder = radeon_find_encoder(connector, DRM_MODE_ENCODER_TVDAC);
		if (!encoder) {
			encoder = radeon_find_encoder(connector, DRM_MODE_ENCODER_DAC);
		}

		if (!encoder)
			return 0;

		radeon_encoder = to_radeon_encoder(encoder);
		if (!radeon_encoder->enc_priv)
			return 0;
		if (rdev->is_atom_bios) {
			struct radeon_encoder_atom_dac *dac_int;
			dac_int = radeon_encoder->enc_priv;
			dac_int->tv_std = val;
		} else {
			struct radeon_encoder_tv_dac *dac_int;
			dac_int = radeon_encoder->enc_priv;
			dac_int->tv_std = val;
		}
		radeon_property_change_mode(&radeon_encoder->base);
	}

	if (property == rdev->mode_info.load_detect_property) {
		struct radeon_connector *radeon_connector =
			to_radeon_connector(connector);

		if (val == 0)
			radeon_connector->dac_load_detect = false;
		else
			radeon_connector->dac_load_detect = true;
	}

	if (property == rdev->mode_info.tmds_pll_property) {
		struct radeon_encoder_int_tmds *tmds = NULL;
		bool ret = false;
		/* need to find digital encoder on connector */
		encoder = radeon_find_encoder(connector, DRM_MODE_ENCODER_TMDS);
		if (!encoder)
			return 0;

		radeon_encoder = to_radeon_encoder(encoder);

		tmds = radeon_encoder->enc_priv;
		if (!tmds)
			return 0;

		if (val == 0) {
			if (rdev->is_atom_bios)
				ret = radeon_atombios_get_tmds_info(radeon_encoder, tmds);
			else
				ret = radeon_legacy_get_tmds_info_from_combios(radeon_encoder, tmds);
		}
		if (val == 1 || ret == false) {
			radeon_legacy_get_tmds_info_from_table(radeon_encoder, tmds);
		}
		radeon_property_change_mode(&radeon_encoder->base);
	}

	return 0;
}

static void radeon_fixup_lvds_native_mode(struct drm_encoder *encoder,
					  struct drm_connector *connector)
{
	struct radeon_encoder *radeon_encoder =	to_radeon_encoder(encoder);
	struct drm_display_mode *native_mode = &radeon_encoder->native_mode;

	/* Try to get native mode details from EDID if necessary */
	if (!native_mode->clock) {
		struct drm_display_mode *t, *mode;

		list_for_each_entry_safe(mode, t, &connector->probed_modes, head) {
			if (mode->hdisplay == native_mode->hdisplay &&
			    mode->vdisplay == native_mode->vdisplay) {
				*native_mode = *mode;
				drm_mode_set_crtcinfo(native_mode, CRTC_INTERLACE_HALVE_V);
				DRM_INFO("Determined LVDS native mode details from EDID\n");
				break;
			}
		}
	}
	if (!native_mode->clock) {
		DRM_INFO("No LVDS native mode details, disabling RMX\n");
		radeon_encoder->rmx_type = RMX_OFF;
	}
}

static int radeon_lvds_get_modes(struct drm_connector *connector)
{
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
	struct drm_encoder *encoder;
	int ret = 0;
	struct drm_display_mode *mode;

	if (radeon_connector->ddc_bus) {
		ret = radeon_ddc_get_modes(radeon_connector);
		if (ret > 0) {
			encoder = radeon_best_single_encoder(connector);
			if (encoder) {
				radeon_fixup_lvds_native_mode(encoder, connector);
				/* add scaled modes */
				radeon_add_common_modes(encoder, connector);
			}
			return ret;
		}
	}

	encoder = radeon_best_single_encoder(connector);
	if (!encoder)
		return 0;

	/* we have no EDID modes */
	mode = radeon_fp_native_mode(encoder);
	if (mode) {
		ret = 1;
		drm_mode_probed_add(connector, mode);
		/* add scaled modes */
		radeon_add_common_modes(encoder, connector);
	}

	return ret;
}

static int radeon_lvds_mode_valid(struct drm_connector *connector,
				  struct drm_display_mode *mode)
{
	struct drm_encoder *encoder = radeon_best_single_encoder(connector);

	if ((mode->hdisplay < 320) || (mode->vdisplay < 240))
		return MODE_PANEL;

	if (encoder) {
		struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
		struct drm_display_mode *native_mode = &radeon_encoder->native_mode;

		/* AVIVO hardware supports downscaling modes larger than the panel
		 * to the panel size, but I'm not sure this is desirable.
		 */
		if ((mode->hdisplay > native_mode->hdisplay) ||
		    (mode->vdisplay > native_mode->vdisplay))
			return MODE_PANEL;

		/* if scaling is disabled, block non-native modes */
		if (radeon_encoder->rmx_type == RMX_OFF) {
			if ((mode->hdisplay != native_mode->hdisplay) ||
			    (mode->vdisplay != native_mode->vdisplay))
				return MODE_PANEL;
		}
	}

	return MODE_OK;
}

static enum drm_connector_status radeon_lvds_detect(struct drm_connector *connector)
{
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
	struct drm_encoder *encoder = radeon_best_single_encoder(connector);
	enum drm_connector_status ret = connector_status_disconnected;

	if (encoder) {
		struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
		struct drm_display_mode *native_mode = &radeon_encoder->native_mode;

		/* check if panel is valid */
		if (native_mode->hdisplay >= 320 && native_mode->vdisplay >= 240)
			ret = connector_status_connected;

	}

	/* check for edid as well */
	if (radeon_connector->edid)
		ret = connector_status_connected;
	else {
		if (radeon_connector->ddc_bus) {
			radeon_i2c_do_lock(radeon_connector->ddc_bus, 1);
			radeon_connector->edid = drm_get_edid(&radeon_connector->base,
							      &radeon_connector->ddc_bus->adapter);
			radeon_i2c_do_lock(radeon_connector->ddc_bus, 0);
			if (radeon_connector->edid)
				ret = connector_status_connected;
		}
	}
	/* check acpi lid status ??? */

	radeon_connector_update_scratch_regs(connector, ret);
	return ret;
}

static void radeon_connector_destroy(struct drm_connector *connector)
{
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);

	if (radeon_connector->ddc_bus)
		radeon_i2c_destroy(radeon_connector->ddc_bus);
	if (radeon_connector->edid)
		kfree(radeon_connector->edid);
	kfree(radeon_connector->con_priv);
	drm_sysfs_connector_remove(connector);
	drm_connector_cleanup(connector);
	kfree(connector);
}

static int radeon_lvds_set_property(struct drm_connector *connector,
				    struct drm_property *property,
				    uint64_t value)
{
	struct drm_device *dev = connector->dev;
	struct radeon_encoder *radeon_encoder;
	enum radeon_rmx_type rmx_type;

	DRM_DEBUG("\n");
	if (property != dev->mode_config.scaling_mode_property)
		return 0;

	if (connector->encoder)
		radeon_encoder = to_radeon_encoder(connector->encoder);
	else {
		struct drm_connector_helper_funcs *connector_funcs = connector->helper_private;
		radeon_encoder = to_radeon_encoder(connector_funcs->best_encoder(connector));
	}

	switch (value) {
	case DRM_MODE_SCALE_NONE: rmx_type = RMX_OFF; break;
	case DRM_MODE_SCALE_CENTER: rmx_type = RMX_CENTER; break;
	case DRM_MODE_SCALE_ASPECT: rmx_type = RMX_ASPECT; break;
	default:
	case DRM_MODE_SCALE_FULLSCREEN: rmx_type = RMX_FULL; break;
	}
	if (radeon_encoder->rmx_type == rmx_type)
		return 0;

	radeon_encoder->rmx_type = rmx_type;

	radeon_property_change_mode(&radeon_encoder->base);
	return 0;
}


struct drm_connector_helper_funcs radeon_lvds_connector_helper_funcs = {
	.get_modes = radeon_lvds_get_modes,
	.mode_valid = radeon_lvds_mode_valid,
	.best_encoder = radeon_best_single_encoder,
};

struct drm_connector_funcs radeon_lvds_connector_funcs = {
	.dpms = drm_helper_connector_dpms,
	.detect = radeon_lvds_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = radeon_connector_destroy,
	.set_property = radeon_lvds_set_property,
};

static int radeon_vga_get_modes(struct drm_connector *connector)
{
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
	int ret;

	ret = radeon_ddc_get_modes(radeon_connector);

	return ret;
}

static int radeon_vga_mode_valid(struct drm_connector *connector,
				  struct drm_display_mode *mode)
{
	/* XXX check mode bandwidth */
	/* XXX verify against max DAC output frequency */
	return MODE_OK;
}

static enum drm_connector_status radeon_vga_detect(struct drm_connector *connector)
{
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
	struct drm_encoder *encoder;
	struct drm_encoder_helper_funcs *encoder_funcs;
	bool dret;
	enum drm_connector_status ret = connector_status_disconnected;

	encoder = radeon_best_single_encoder(connector);
	if (!encoder)
		ret = connector_status_disconnected;

	radeon_i2c_do_lock(radeon_connector->ddc_bus, 1);
	dret = radeon_ddc_probe(radeon_connector);
	radeon_i2c_do_lock(radeon_connector->ddc_bus, 0);
	if (dret) {
		if (radeon_connector->edid) {
			kfree(radeon_connector->edid);
			radeon_connector->edid = NULL;
		}
		radeon_i2c_do_lock(radeon_connector->ddc_bus, 1);
		radeon_connector->edid = drm_get_edid(&radeon_connector->base, &radeon_connector->ddc_bus->adapter);
		radeon_i2c_do_lock(radeon_connector->ddc_bus, 0);

		if (!radeon_connector->edid) {
			DRM_ERROR("%s: probed a monitor but no|invalid EDID\n",
					drm_get_connector_name(connector));
			ret = connector_status_connected;
		} else {
			radeon_connector->use_digital = !!(radeon_connector->edid->input & DRM_EDID_INPUT_DIGITAL);

			/* some oems have boards with separate digital and analog connectors
			 * with a shared ddc line (often vga + hdmi)
			 */
			if (radeon_connector->use_digital && radeon_connector->shared_ddc) {
				kfree(radeon_connector->edid);
				radeon_connector->edid = NULL;
				ret = connector_status_disconnected;
			} else
				ret = connector_status_connected;
		}
	} else {
		if (radeon_connector->dac_load_detect) {
			encoder_funcs = encoder->helper_private;
			ret = encoder_funcs->detect(encoder, connector);
		}
	}

	if (ret == connector_status_connected)
		ret = radeon_connector_analog_encoder_conflict_solve(connector, encoder, ret, true);
	radeon_connector_update_scratch_regs(connector, ret);
	return ret;
}

struct drm_connector_helper_funcs radeon_vga_connector_helper_funcs = {
	.get_modes = radeon_vga_get_modes,
	.mode_valid = radeon_vga_mode_valid,
	.best_encoder = radeon_best_single_encoder,
};

struct drm_connector_funcs radeon_vga_connector_funcs = {
	.dpms = drm_helper_connector_dpms,
	.detect = radeon_vga_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = radeon_connector_destroy,
	.set_property = radeon_connector_set_property,
};

static int radeon_tv_get_modes(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct drm_display_mode *tv_mode;
	struct drm_encoder *encoder;

	encoder = radeon_best_single_encoder(connector);
	if (!encoder)
		return 0;

	/* avivo chips can scale any mode */
	if (rdev->family >= CHIP_RS600)
		/* add scaled modes */
		radeon_add_common_modes(encoder, connector);
	else {
		/* only 800x600 is supported right now on pre-avivo chips */
		tv_mode = drm_cvt_mode(dev, 800, 600, 60, false, false, false);
		tv_mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
		drm_mode_probed_add(connector, tv_mode);
	}
	return 1;
}

static int radeon_tv_mode_valid(struct drm_connector *connector,
				struct drm_display_mode *mode)
{
	if ((mode->hdisplay > 1024) || (mode->vdisplay > 768))
		return MODE_CLOCK_RANGE;
	return MODE_OK;
}

static enum drm_connector_status radeon_tv_detect(struct drm_connector *connector)
{
	struct drm_encoder *encoder;
	struct drm_encoder_helper_funcs *encoder_funcs;
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
	enum drm_connector_status ret = connector_status_disconnected;

	if (!radeon_connector->dac_load_detect)
		return ret;

	encoder = radeon_best_single_encoder(connector);
	if (!encoder)
		ret = connector_status_disconnected;
	else {
		encoder_funcs = encoder->helper_private;
		ret = encoder_funcs->detect(encoder, connector);
	}
	if (ret == connector_status_connected)
		ret = radeon_connector_analog_encoder_conflict_solve(connector, encoder, ret, false);
	radeon_connector_update_scratch_regs(connector, ret);
	return ret;
}

struct drm_connector_helper_funcs radeon_tv_connector_helper_funcs = {
	.get_modes = radeon_tv_get_modes,
	.mode_valid = radeon_tv_mode_valid,
	.best_encoder = radeon_best_single_encoder,
};

struct drm_connector_funcs radeon_tv_connector_funcs = {
	.dpms = drm_helper_connector_dpms,
	.detect = radeon_tv_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = radeon_connector_destroy,
	.set_property = radeon_connector_set_property,
};

static int radeon_dvi_get_modes(struct drm_connector *connector)
{
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
	int ret;

	ret = radeon_ddc_get_modes(radeon_connector);
	return ret;
}

/*
 * DVI is complicated
 * Do a DDC probe, if DDC probe passes, get the full EDID so
 * we can do analog/digital monitor detection at this point.
 * If the monitor is an analog monitor or we got no DDC,
 * we need to find the DAC encoder object for this connector.
 * If we got no DDC, we do load detection on the DAC encoder object.
 * If we got analog DDC or load detection passes on the DAC encoder
 * we have to check if this analog encoder is shared with anyone else (TV)
 * if its shared we have to set the other connector to disconnected.
 */
static enum drm_connector_status radeon_dvi_detect(struct drm_connector *connector)
{
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
	struct drm_encoder *encoder = NULL;
	struct drm_encoder_helper_funcs *encoder_funcs;
	struct drm_mode_object *obj;
	int i;
	enum drm_connector_status ret = connector_status_disconnected;
	bool dret;

	radeon_i2c_do_lock(radeon_connector->ddc_bus, 1);
	dret = radeon_ddc_probe(radeon_connector);
	radeon_i2c_do_lock(radeon_connector->ddc_bus, 0);
	if (dret) {
		if (radeon_connector->edid) {
			kfree(radeon_connector->edid);
			radeon_connector->edid = NULL;
		}
		radeon_i2c_do_lock(radeon_connector->ddc_bus, 1);
		radeon_connector->edid = drm_get_edid(&radeon_connector->base, &radeon_connector->ddc_bus->adapter);
		radeon_i2c_do_lock(radeon_connector->ddc_bus, 0);

		if (!radeon_connector->edid) {
			DRM_ERROR("%s: probed a monitor but no|invalid EDID\n",
					drm_get_connector_name(connector));
		} else {
			radeon_connector->use_digital = !!(radeon_connector->edid->input & DRM_EDID_INPUT_DIGITAL);

			/* some oems have boards with separate digital and analog connectors
			 * with a shared ddc line (often vga + hdmi)
			 */
			if ((!radeon_connector->use_digital) && radeon_connector->shared_ddc) {
				kfree(radeon_connector->edid);
				radeon_connector->edid = NULL;
				ret = connector_status_disconnected;
			} else
				ret = connector_status_connected;

			/* multiple connectors on the same encoder with the same ddc line
			 * This tends to be HDMI and DVI on the same encoder with the
			 * same ddc line.  If the edid says HDMI, consider the HDMI port
			 * connected and the DVI port disconnected.  If the edid doesn't
			 * say HDMI, vice versa.
			 */
			if (radeon_connector->shared_ddc && connector_status_connected) {
				struct drm_device *dev = connector->dev;
				struct drm_connector *list_connector;
				struct radeon_connector *list_radeon_connector;
				list_for_each_entry(list_connector, &dev->mode_config.connector_list, head) {
					if (connector == list_connector)
						continue;
					list_radeon_connector = to_radeon_connector(list_connector);
					if (radeon_connector->devices == list_radeon_connector->devices) {
						if (drm_detect_hdmi_monitor(radeon_connector->edid)) {
							if (connector->connector_type == DRM_MODE_CONNECTOR_DVID) {
								kfree(radeon_connector->edid);
								radeon_connector->edid = NULL;
								ret = connector_status_disconnected;
							}
						} else {
							if ((connector->connector_type == DRM_MODE_CONNECTOR_HDMIA) ||
							    (connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)) {
								kfree(radeon_connector->edid);
								radeon_connector->edid = NULL;
								ret = connector_status_disconnected;
							}
						}
					}
				}
			}
		}
	}

	if ((ret == connector_status_connected) && (radeon_connector->use_digital == true))
		goto out;

	/* find analog encoder */
	if (radeon_connector->dac_load_detect) {
		for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
			if (connector->encoder_ids[i] == 0)
				break;

			obj = drm_mode_object_find(connector->dev,
						   connector->encoder_ids[i],
						   DRM_MODE_OBJECT_ENCODER);
			if (!obj)
				continue;

			encoder = obj_to_encoder(obj);

			encoder_funcs = encoder->helper_private;
			if (encoder_funcs->detect) {
				if (ret != connector_status_connected) {
					ret = encoder_funcs->detect(encoder, connector);
					if (ret == connector_status_connected) {
						radeon_connector->use_digital = false;
					}
				}
				break;
			}
		}
	}

	if ((ret == connector_status_connected) && (radeon_connector->use_digital == false) &&
	    encoder) {
		ret = radeon_connector_analog_encoder_conflict_solve(connector, encoder, ret, true);
	}

out:
	/* updated in get modes as well since we need to know if it's analog or digital */
	radeon_connector_update_scratch_regs(connector, ret);
	return ret;
}

/* okay need to be smart in here about which encoder to pick */
struct drm_encoder *radeon_dvi_encoder(struct drm_connector *connector)
{
	int enc_id = connector->encoder_ids[0];
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
	struct drm_mode_object *obj;
	struct drm_encoder *encoder;
	int i;
	for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
		if (connector->encoder_ids[i] == 0)
			break;

		obj = drm_mode_object_find(connector->dev, connector->encoder_ids[i], DRM_MODE_OBJECT_ENCODER);
		if (!obj)
			continue;

		encoder = obj_to_encoder(obj);

		if (radeon_connector->use_digital == true) {
			if (encoder->encoder_type == DRM_MODE_ENCODER_TMDS)
				return encoder;
		} else {
			if (encoder->encoder_type == DRM_MODE_ENCODER_DAC ||
			    encoder->encoder_type == DRM_MODE_ENCODER_TVDAC)
				return encoder;
		}
	}

	/* see if we have a default encoder  TODO */

	/* then check use digitial */
	/* pick the first one */
	if (enc_id) {
		obj = drm_mode_object_find(connector->dev, enc_id, DRM_MODE_OBJECT_ENCODER);
		if (!obj)
			return NULL;
		encoder = obj_to_encoder(obj);
		return encoder;
	}
	return NULL;
}

static void radeon_dvi_force(struct drm_connector *connector)
{
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
	if (connector->force == DRM_FORCE_ON)
		radeon_connector->use_digital = false;
	if (connector->force == DRM_FORCE_ON_DIGITAL)
		radeon_connector->use_digital = true;
}

static int radeon_dvi_mode_valid(struct drm_connector *connector,
				  struct drm_display_mode *mode)
{
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);

	/* XXX check mode bandwidth */

	if (radeon_connector->use_digital && (mode->clock > 165000)) {
		if ((radeon_connector->connector_object_id == CONNECTOR_OBJECT_ID_DUAL_LINK_DVI_I) ||
		    (radeon_connector->connector_object_id == CONNECTOR_OBJECT_ID_DUAL_LINK_DVI_D) ||
		    (radeon_connector->connector_object_id == CONNECTOR_OBJECT_ID_HDMI_TYPE_B))
			return MODE_OK;
		else
			return MODE_CLOCK_HIGH;
	}
	return MODE_OK;
}

struct drm_connector_helper_funcs radeon_dvi_connector_helper_funcs = {
	.get_modes = radeon_dvi_get_modes,
	.mode_valid = radeon_dvi_mode_valid,
	.best_encoder = radeon_dvi_encoder,
};

struct drm_connector_funcs radeon_dvi_connector_funcs = {
	.dpms = drm_helper_connector_dpms,
	.detect = radeon_dvi_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.set_property = radeon_connector_set_property,
	.destroy = radeon_connector_destroy,
	.force = radeon_dvi_force,
};

static void radeon_dp_connector_destroy(struct drm_connector *connector)
{
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
	struct radeon_connector_atom_dig *radeon_dig_connector = radeon_connector->con_priv;

	if (radeon_connector->ddc_bus)
		radeon_i2c_destroy(radeon_connector->ddc_bus);
	if (radeon_connector->edid)
		kfree(radeon_connector->edid);
	if (radeon_dig_connector->dp_i2c_bus)
		radeon_i2c_destroy(radeon_dig_connector->dp_i2c_bus);
	kfree(radeon_connector->con_priv);
	drm_sysfs_connector_remove(connector);
	drm_connector_cleanup(connector);
	kfree(connector);
}

static int radeon_dp_get_modes(struct drm_connector *connector)
{
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
	int ret;

	ret = radeon_ddc_get_modes(radeon_connector);
	return ret;
}

static enum drm_connector_status radeon_dp_detect(struct drm_connector *connector)
{
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
	enum drm_connector_status ret = connector_status_disconnected;
	struct radeon_connector_atom_dig *radeon_dig_connector = radeon_connector->con_priv;
	u8 sink_type;

	if (radeon_connector->edid) {
		kfree(radeon_connector->edid);
		radeon_connector->edid = NULL;
	}

	sink_type = radeon_dp_getsinktype(radeon_connector);
	if (sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) {
		if (radeon_dp_getdpcd(radeon_connector)) {
			radeon_dig_connector->dp_sink_type = sink_type;
			ret = connector_status_connected;
		}
	} else {
		radeon_i2c_do_lock(radeon_connector->ddc_bus, 1);
		if (radeon_ddc_probe(radeon_connector)) {
			radeon_dig_connector->dp_sink_type = sink_type;
			ret = connector_status_connected;
		}
		radeon_i2c_do_lock(radeon_connector->ddc_bus, 0);
	}

	return ret;
}

static int radeon_dp_mode_valid(struct drm_connector *connector,
				  struct drm_display_mode *mode)
{
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
	struct radeon_connector_atom_dig *radeon_dig_connector = radeon_connector->con_priv;

	/* XXX check mode bandwidth */

	if (radeon_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT)
		return radeon_dp_mode_valid_helper(radeon_connector, mode);
	else
		return MODE_OK;
}

struct drm_connector_helper_funcs radeon_dp_connector_helper_funcs = {
	.get_modes = radeon_dp_get_modes,
	.mode_valid = radeon_dp_mode_valid,
	.best_encoder = radeon_dvi_encoder,
};

struct drm_connector_funcs radeon_dp_connector_funcs = {
	.dpms = drm_helper_connector_dpms,
	.detect = radeon_dp_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.set_property = radeon_connector_set_property,
	.destroy = radeon_dp_connector_destroy,
	.force = radeon_dvi_force,
};

void
radeon_add_atom_connector(struct drm_device *dev,
			  uint32_t connector_id,
			  uint32_t supported_device,
			  int connector_type,
			  struct radeon_i2c_bus_rec *i2c_bus,
			  bool linkb,
			  uint32_t igp_lane_info,
			  uint16_t connector_object_id,
			  struct radeon_hpd *hpd)
{
	struct radeon_device *rdev = dev->dev_private;
	struct drm_connector *connector;
	struct radeon_connector *radeon_connector;
	struct radeon_connector_atom_dig *radeon_dig_connector;
	uint32_t subpixel_order = SubPixelNone;
	bool shared_ddc = false;
	int ret;

	/* fixme - tv/cv/din */
	if (connector_type == DRM_MODE_CONNECTOR_Unknown)
		return;

	/* see if we already added it */
	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
		radeon_connector = to_radeon_connector(connector);
		if (radeon_connector->connector_id == connector_id) {
			radeon_connector->devices |= supported_device;
			return;
		}
		if (radeon_connector->ddc_bus && i2c_bus->valid) {
			if (memcmp(&radeon_connector->ddc_bus->rec, i2c_bus,
				    sizeof(struct radeon_i2c_bus_rec)) == 0) {
				radeon_connector->shared_ddc = true;
				shared_ddc = true;
			}
		}
	}

	radeon_connector = kzalloc(sizeof(struct radeon_connector), GFP_KERNEL);
	if (!radeon_connector)
		return;

	connector = &radeon_connector->base;

	radeon_connector->connector_id = connector_id;
	radeon_connector->devices = supported_device;
	radeon_connector->shared_ddc = shared_ddc;
	radeon_connector->connector_object_id = connector_object_id;
	radeon_connector->hpd = *hpd;
	switch (connector_type) {
	case DRM_MODE_CONNECTOR_VGA:
		drm_connector_init(dev, &radeon_connector->base, &radeon_vga_connector_funcs, connector_type);
		ret = drm_connector_helper_add(&radeon_connector->base, &radeon_vga_connector_helper_funcs);
		if (ret)
			goto failed;
		if (i2c_bus->valid) {
			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "VGA");
			if (!radeon_connector->ddc_bus)
				goto failed;
		}
		radeon_connector->dac_load_detect = true;
		drm_connector_attach_property(&radeon_connector->base,
					      rdev->mode_info.load_detect_property,
					      1);
		break;
	case DRM_MODE_CONNECTOR_DVIA:
		drm_connector_init(dev, &radeon_connector->base, &radeon_vga_connector_funcs, connector_type);
		ret = drm_connector_helper_add(&radeon_connector->base, &radeon_vga_connector_helper_funcs);
		if (ret)
			goto failed;
		if (i2c_bus->valid) {
			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "DVI");
			if (!radeon_connector->ddc_bus)
				goto failed;
		}
		radeon_connector->dac_load_detect = true;
		drm_connector_attach_property(&radeon_connector->base,
					      rdev->mode_info.load_detect_property,
					      1);
		break;
	case DRM_MODE_CONNECTOR_DVII:
	case DRM_MODE_CONNECTOR_DVID:
		radeon_dig_connector = kzalloc(sizeof(struct radeon_connector_atom_dig), GFP_KERNEL);
		if (!radeon_dig_connector)
			goto failed;
		radeon_dig_connector->linkb = linkb;
		radeon_dig_connector->igp_lane_info = igp_lane_info;
		radeon_connector->con_priv = radeon_dig_connector;
		drm_connector_init(dev, &radeon_connector->base, &radeon_dvi_connector_funcs, connector_type);
		ret = drm_connector_helper_add(&radeon_connector->base, &radeon_dvi_connector_helper_funcs);
		if (ret)
			goto failed;
		if (i2c_bus->valid) {
			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "DVI");
			if (!radeon_connector->ddc_bus)
				goto failed;
		}
		subpixel_order = SubPixelHorizontalRGB;
		drm_connector_attach_property(&radeon_connector->base,
					      rdev->mode_info.coherent_mode_property,
					      1);
		if (connector_type == DRM_MODE_CONNECTOR_DVII) {
			radeon_connector->dac_load_detect = true;
			drm_connector_attach_property(&radeon_connector->base,
						      rdev->mode_info.load_detect_property,
						      1);
		}
		break;
	case DRM_MODE_CONNECTOR_HDMIA:
	case DRM_MODE_CONNECTOR_HDMIB:
		radeon_dig_connector = kzalloc(sizeof(struct radeon_connector_atom_dig), GFP_KERNEL);
		if (!radeon_dig_connector)
			goto failed;
		radeon_dig_connector->linkb = linkb;
		radeon_dig_connector->igp_lane_info = igp_lane_info;
		radeon_connector->con_priv = radeon_dig_connector;
		drm_connector_init(dev, &radeon_connector->base, &radeon_dvi_connector_funcs, connector_type);
		ret = drm_connector_helper_add(&radeon_connector->base, &radeon_dvi_connector_helper_funcs);
		if (ret)
			goto failed;
		if (i2c_bus->valid) {
			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "HDMI");
			if (!radeon_connector->ddc_bus)
				goto failed;
		}
		drm_connector_attach_property(&radeon_connector->base,
					      rdev->mode_info.coherent_mode_property,
					      1);
		subpixel_order = SubPixelHorizontalRGB;
		break;
	case DRM_MODE_CONNECTOR_DisplayPort:
		radeon_dig_connector = kzalloc(sizeof(struct radeon_connector_atom_dig), GFP_KERNEL);
		if (!radeon_dig_connector)
			goto failed;
		radeon_dig_connector->linkb = linkb;
		radeon_dig_connector->igp_lane_info = igp_lane_info;
		radeon_connector->con_priv = radeon_dig_connector;
		drm_connector_init(dev, &radeon_connector->base, &radeon_dp_connector_funcs, connector_type);
		ret = drm_connector_helper_add(&radeon_connector->base, &radeon_dp_connector_helper_funcs);
		if (ret)
			goto failed;
		if (i2c_bus->valid) {
			/* add DP i2c bus */
			radeon_dig_connector->dp_i2c_bus = radeon_i2c_create_dp(dev, i2c_bus, "DP-auxch");
			if (!radeon_dig_connector->dp_i2c_bus)
				goto failed;
			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "DP");
			if (!radeon_connector->ddc_bus)
				goto failed;
		}
		subpixel_order = SubPixelHorizontalRGB;
		drm_connector_attach_property(&radeon_connector->base,
					      rdev->mode_info.coherent_mode_property,
					      1);
		break;
	case DRM_MODE_CONNECTOR_SVIDEO:
	case DRM_MODE_CONNECTOR_Composite:
	case DRM_MODE_CONNECTOR_9PinDIN:
		if (radeon_tv == 1) {
			drm_connector_init(dev, &radeon_connector->base, &radeon_tv_connector_funcs, connector_type);
			ret = drm_connector_helper_add(&radeon_connector->base, &radeon_tv_connector_helper_funcs);
			if (ret)
				goto failed;
			radeon_connector->dac_load_detect = true;
			drm_connector_attach_property(&radeon_connector->base,
						      rdev->mode_info.load_detect_property,
						      1);
			drm_connector_attach_property(&radeon_connector->base,
						      rdev->mode_info.tv_std_property,
						      radeon_atombios_get_tv_info(rdev));
		}
		break;
	case DRM_MODE_CONNECTOR_LVDS:
		radeon_dig_connector = kzalloc(sizeof(struct radeon_connector_atom_dig), GFP_KERNEL);
		if (!radeon_dig_connector)
			goto failed;
		radeon_dig_connector->linkb = linkb;
		radeon_dig_connector->igp_lane_info = igp_lane_info;
		radeon_connector->con_priv = radeon_dig_connector;
		drm_connector_init(dev, &radeon_connector->base, &radeon_lvds_connector_funcs, connector_type);
		ret = drm_connector_helper_add(&radeon_connector->base, &radeon_lvds_connector_helper_funcs);
		if (ret)
			goto failed;
		if (i2c_bus->valid) {
			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "LVDS");
			if (!radeon_connector->ddc_bus)
				goto failed;
		}
		drm_connector_attach_property(&radeon_connector->base,
					      dev->mode_config.scaling_mode_property,
					      DRM_MODE_SCALE_FULLSCREEN);
		subpixel_order = SubPixelHorizontalRGB;
		break;
	}

	connector->display_info.subpixel_order = subpixel_order;
	drm_sysfs_connector_add(connector);
	return;

failed:
	if (radeon_connector->ddc_bus)
		radeon_i2c_destroy(radeon_connector->ddc_bus);
	drm_connector_cleanup(connector);
	kfree(connector);
}

void
radeon_add_legacy_connector(struct drm_device *dev,
			    uint32_t connector_id,
			    uint32_t supported_device,
			    int connector_type,
			    struct radeon_i2c_bus_rec *i2c_bus,
			    uint16_t connector_object_id,
			    struct radeon_hpd *hpd)
{
	struct radeon_device *rdev = dev->dev_private;
	struct drm_connector *connector;
	struct radeon_connector *radeon_connector;
	uint32_t subpixel_order = SubPixelNone;
	int ret;

	/* fixme - tv/cv/din */
	if (connector_type == DRM_MODE_CONNECTOR_Unknown)
		return;

	/* see if we already added it */
	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
		radeon_connector = to_radeon_connector(connector);
		if (radeon_connector->connector_id == connector_id) {
			radeon_connector->devices |= supported_device;
			return;
		}
	}

	radeon_connector = kzalloc(sizeof(struct radeon_connector), GFP_KERNEL);
	if (!radeon_connector)
		return;

	connector = &radeon_connector->base;

	radeon_connector->connector_id = connector_id;
	radeon_connector->devices = supported_device;
	radeon_connector->connector_object_id = connector_object_id;
	radeon_connector->hpd = *hpd;
	switch (connector_type) {
	case DRM_MODE_CONNECTOR_VGA:
		drm_connector_init(dev, &radeon_connector->base, &radeon_vga_connector_funcs, connector_type);
		ret = drm_connector_helper_add(&radeon_connector->base, &radeon_vga_connector_helper_funcs);
		if (ret)
			goto failed;
		if (i2c_bus->valid) {
			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "VGA");
			if (!radeon_connector->ddc_bus)
				goto failed;
		}
		radeon_connector->dac_load_detect = true;
		drm_connector_attach_property(&radeon_connector->base,
					      rdev->mode_info.load_detect_property,
					      1);
		break;
	case DRM_MODE_CONNECTOR_DVIA:
		drm_connector_init(dev, &radeon_connector->base, &radeon_vga_connector_funcs, connector_type);
		ret = drm_connector_helper_add(&radeon_connector->base, &radeon_vga_connector_helper_funcs);
		if (ret)
			goto failed;
		if (i2c_bus->valid) {
			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "DVI");
			if (!radeon_connector->ddc_bus)
				goto failed;
		}
		radeon_connector->dac_load_detect = true;
		drm_connector_attach_property(&radeon_connector->base,
					      rdev->mode_info.load_detect_property,
					      1);
		break;
	case DRM_MODE_CONNECTOR_DVII:
	case DRM_MODE_CONNECTOR_DVID:
		drm_connector_init(dev, &radeon_connector->base, &radeon_dvi_connector_funcs, connector_type);
		ret = drm_connector_helper_add(&radeon_connector->base, &radeon_dvi_connector_helper_funcs);
		if (ret)
			goto failed;
		if (i2c_bus->valid) {
			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "DVI");
			if (!radeon_connector->ddc_bus)
				goto failed;
			radeon_connector->dac_load_detect = true;
			drm_connector_attach_property(&radeon_connector->base,
						      rdev->mode_info.load_detect_property,
						      1);
		}
		subpixel_order = SubPixelHorizontalRGB;
		break;
	case DRM_MODE_CONNECTOR_SVIDEO:
	case DRM_MODE_CONNECTOR_Composite:
	case DRM_MODE_CONNECTOR_9PinDIN:
		if (radeon_tv == 1) {
			drm_connector_init(dev, &radeon_connector->base, &radeon_tv_connector_funcs, connector_type);
			ret = drm_connector_helper_add(&radeon_connector->base, &radeon_tv_connector_helper_funcs);
			if (ret)
				goto failed;
			radeon_connector->dac_load_detect = true;
			/* RS400,RC410,RS480 chipset seems to report a lot
			 * of false positive on load detect, we haven't yet
			 * found a way to make load detect reliable on those
			 * chipset, thus just disable it for TV.
			 */
			if (rdev->family == CHIP_RS400 || rdev->family == CHIP_RS480)
				radeon_connector->dac_load_detect = false;
			drm_connector_attach_property(&radeon_connector->base,
						      rdev->mode_info.load_detect_property,
						      1);
			drm_connector_attach_property(&radeon_connector->base,
						      rdev->mode_info.tv_std_property,
						      radeon_combios_get_tv_info(rdev));
		}
		break;
	case DRM_MODE_CONNECTOR_LVDS:
		drm_connector_init(dev, &radeon_connector->base, &radeon_lvds_connector_funcs, connector_type);
		ret = drm_connector_helper_add(&radeon_connector->base, &radeon_lvds_connector_helper_funcs);
		if (ret)
			goto failed;
		if (i2c_bus->valid) {
			radeon_connector->ddc_bus = radeon_i2c_create(dev, i2c_bus, "LVDS");
			if (!radeon_connector->ddc_bus)
				goto failed;
		}
		drm_connector_attach_property(&radeon_connector->base,
					      dev->mode_config.scaling_mode_property,
					      DRM_MODE_SCALE_FULLSCREEN);
		subpixel_order = SubPixelHorizontalRGB;
		break;
	}

	connector->display_info.subpixel_order = subpixel_order;
	drm_sysfs_connector_add(connector);
	return;

failed:
	if (radeon_connector->ddc_bus)
		radeon_i2c_destroy(radeon_connector->ddc_bus);
	drm_connector_cleanup(connector);
	kfree(connector);
}