/*
 * 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 <drm/drmP.h>
#include <drm/drm_edid.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/amdgpu_drm.h>
#include "amdgpu.h"
#include "atom.h"
#include "atombios_encoders.h"
#include "atombios_dp.h"
#include "amdgpu_connectors.h"
#include "amdgpu_i2c.h"

#include <linux/pm_runtime.h>

void amdgpu_connector_hotplug(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct amdgpu_device *adev = dev->dev_private;
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);

	/* bail if the connector does not have hpd pin, e.g.,
	 * VGA, TV, etc.
	 */
	if (amdgpu_connector->hpd.hpd == AMDGPU_HPD_NONE)
		return;

	amdgpu_display_hpd_set_polarity(adev, amdgpu_connector->hpd.hpd);

	/* if the connector is already off, don't turn it back on */
	if (connector->dpms != DRM_MODE_DPMS_ON)
		return;

	/* just deal with DP (not eDP) here. */
	if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
		struct amdgpu_connector_atom_dig *dig_connector =
			amdgpu_connector->con_priv;

		/* if existing sink type was not DP no need to retrain */
		if (dig_connector->dp_sink_type != CONNECTOR_OBJECT_ID_DISPLAYPORT)
			return;

		/* first get sink type as it may be reset after (un)plug */
		dig_connector->dp_sink_type = amdgpu_atombios_dp_get_sinktype(amdgpu_connector);
		/* don't do anything if sink is not display port, i.e.,
		 * passive dp->(dvi|hdmi) adaptor
		 */
		if (dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT &&
		    amdgpu_display_hpd_sense(adev, amdgpu_connector->hpd.hpd) &&
		    amdgpu_atombios_dp_needs_link_train(amdgpu_connector)) {
			/* Don't start link training before we have the DPCD */
			if (amdgpu_atombios_dp_get_dpcd(amdgpu_connector))
				return;

			/* Turn the connector off and back on immediately, which
			 * will trigger link training
			 */
			drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
			drm_helper_connector_dpms(connector, DRM_MODE_DPMS_ON);
		}
	}
}

static void amdgpu_connector_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->primary->fb);
	}
}

int amdgpu_connector_get_monitor_bpc(struct drm_connector *connector)
{
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
	struct amdgpu_connector_atom_dig *dig_connector;
	int bpc = 8;
	unsigned mode_clock, max_tmds_clock;

	switch (connector->connector_type) {
	case DRM_MODE_CONNECTOR_DVII:
	case DRM_MODE_CONNECTOR_HDMIB:
		if (amdgpu_connector->use_digital) {
			if (drm_detect_hdmi_monitor(amdgpu_connector_edid(connector))) {
				if (connector->display_info.bpc)
					bpc = connector->display_info.bpc;
			}
		}
		break;
	case DRM_MODE_CONNECTOR_DVID:
	case DRM_MODE_CONNECTOR_HDMIA:
		if (drm_detect_hdmi_monitor(amdgpu_connector_edid(connector))) {
			if (connector->display_info.bpc)
				bpc = connector->display_info.bpc;
		}
		break;
	case DRM_MODE_CONNECTOR_DisplayPort:
		dig_connector = amdgpu_connector->con_priv;
		if ((dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) ||
		    (dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP) ||
		    drm_detect_hdmi_monitor(amdgpu_connector_edid(connector))) {
			if (connector->display_info.bpc)
				bpc = connector->display_info.bpc;
		}
		break;
	case DRM_MODE_CONNECTOR_eDP:
	case DRM_MODE_CONNECTOR_LVDS:
		if (connector->display_info.bpc)
			bpc = connector->display_info.bpc;
		else {
			const struct drm_connector_helper_funcs *connector_funcs =
				connector->helper_private;
			struct drm_encoder *encoder = connector_funcs->best_encoder(connector);
			struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
			struct amdgpu_encoder_atom_dig *dig = amdgpu_encoder->enc_priv;

			if (dig->lcd_misc & ATOM_PANEL_MISC_V13_6BIT_PER_COLOR)
				bpc = 6;
			else if (dig->lcd_misc & ATOM_PANEL_MISC_V13_8BIT_PER_COLOR)
				bpc = 8;
		}
		break;
	}

	if (drm_detect_hdmi_monitor(amdgpu_connector_edid(connector))) {
		/*
		 * Pre DCE-8 hw can't handle > 12 bpc, and more than 12 bpc doesn't make
		 * much sense without support for > 12 bpc framebuffers. RGB 4:4:4 at
		 * 12 bpc is always supported on hdmi deep color sinks, as this is
		 * required by the HDMI-1.3 spec. Clamp to a safe 12 bpc maximum.
		 */
		if (bpc > 12) {
			DRM_DEBUG("%s: HDMI deep color %d bpc unsupported. Using 12 bpc.\n",
				  connector->name, bpc);
			bpc = 12;
		}

		/* Any defined maximum tmds clock limit we must not exceed? */
		if (connector->display_info.max_tmds_clock > 0) {
			/* mode_clock is clock in kHz for mode to be modeset on this connector */
			mode_clock = amdgpu_connector->pixelclock_for_modeset;

			/* Maximum allowable input clock in kHz */
			max_tmds_clock = connector->display_info.max_tmds_clock;

			DRM_DEBUG("%s: hdmi mode dotclock %d kHz, max tmds input clock %d kHz.\n",
				  connector->name, mode_clock, max_tmds_clock);

			/* Check if bpc is within clock limit. Try to degrade gracefully otherwise */
			if ((bpc == 12) && (mode_clock * 3/2 > max_tmds_clock)) {
				if ((connector->display_info.edid_hdmi_dc_modes & DRM_EDID_HDMI_DC_30) &&
				    (mode_clock * 5/4 <= max_tmds_clock))
					bpc = 10;
				else
					bpc = 8;

				DRM_DEBUG("%s: HDMI deep color 12 bpc exceeds max tmds clock. Using %d bpc.\n",
					  connector->name, bpc);
			}

			if ((bpc == 10) && (mode_clock * 5/4 > max_tmds_clock)) {
				bpc = 8;
				DRM_DEBUG("%s: HDMI deep color 10 bpc exceeds max tmds clock. Using %d bpc.\n",
					  connector->name, bpc);
			}
		} else if (bpc > 8) {
			/* max_tmds_clock missing, but hdmi spec mandates it for deep color. */
			DRM_DEBUG("%s: Required max tmds clock for HDMI deep color missing. Using 8 bpc.\n",
				  connector->name);
			bpc = 8;
		}
	}

	if ((amdgpu_deep_color == 0) && (bpc > 8)) {
		DRM_DEBUG("%s: Deep color disabled. Set amdgpu module param deep_color=1 to enable.\n",
			  connector->name);
		bpc = 8;
	}

	DRM_DEBUG("%s: Display bpc=%d, returned bpc=%d\n",
		  connector->name, connector->display_info.bpc, bpc);

	return bpc;
}

static void
amdgpu_connector_update_scratch_regs(struct drm_connector *connector,
				      enum drm_connector_status status)
{
	struct drm_encoder *best_encoder;
	struct drm_encoder *encoder;
	const struct drm_connector_helper_funcs *connector_funcs = connector->helper_private;
	bool connected;
	int i;

	best_encoder = connector_funcs->best_encoder(connector);

	drm_connector_for_each_possible_encoder(connector, encoder, i) {
		if ((encoder == best_encoder) && (status == connector_status_connected))
			connected = true;
		else
			connected = false;

		amdgpu_atombios_encoder_set_bios_scratch_regs(connector, encoder, connected);
	}
}

static struct drm_encoder *
amdgpu_connector_find_encoder(struct drm_connector *connector,
			       int encoder_type)
{
	struct drm_encoder *encoder;
	int i;

	drm_connector_for_each_possible_encoder(connector, encoder, i) {
		if (encoder->encoder_type == encoder_type)
			return encoder;
	}

	return NULL;
}

struct edid *amdgpu_connector_edid(struct drm_connector *connector)
{
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
	struct drm_property_blob *edid_blob = connector->edid_blob_ptr;

	if (amdgpu_connector->edid) {
		return amdgpu_connector->edid;
	} else if (edid_blob) {
		struct edid *edid = kmemdup(edid_blob->data, edid_blob->length, GFP_KERNEL);
		if (edid)
			amdgpu_connector->edid = edid;
	}
	return amdgpu_connector->edid;
}

static struct edid *
amdgpu_connector_get_hardcoded_edid(struct amdgpu_device *adev)
{
	struct edid *edid;

	if (adev->mode_info.bios_hardcoded_edid) {
		edid = kmalloc(adev->mode_info.bios_hardcoded_edid_size, GFP_KERNEL);
		if (edid) {
			memcpy((unsigned char *)edid,
			       (unsigned char *)adev->mode_info.bios_hardcoded_edid,
			       adev->mode_info.bios_hardcoded_edid_size);
			return edid;
		}
	}
	return NULL;
}

static void amdgpu_connector_get_edid(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct amdgpu_device *adev = dev->dev_private;
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);

	if (amdgpu_connector->edid)
		return;

	/* on hw with routers, select right port */
	if (amdgpu_connector->router.ddc_valid)
		amdgpu_i2c_router_select_ddc_port(amdgpu_connector);

	if ((amdgpu_connector_encoder_get_dp_bridge_encoder_id(connector) !=
	     ENCODER_OBJECT_ID_NONE) &&
	    amdgpu_connector->ddc_bus->has_aux) {
		amdgpu_connector->edid = drm_get_edid(connector,
						      &amdgpu_connector->ddc_bus->aux.ddc);
	} else if ((connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) ||
		   (connector->connector_type == DRM_MODE_CONNECTOR_eDP)) {
		struct amdgpu_connector_atom_dig *dig = amdgpu_connector->con_priv;

		if ((dig->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT ||
		     dig->dp_sink_type == CONNECTOR_OBJECT_ID_eDP) &&
		    amdgpu_connector->ddc_bus->has_aux)
			amdgpu_connector->edid = drm_get_edid(connector,
							      &amdgpu_connector->ddc_bus->aux.ddc);
		else if (amdgpu_connector->ddc_bus)
			amdgpu_connector->edid = drm_get_edid(connector,
							      &amdgpu_connector->ddc_bus->adapter);
	} else if (amdgpu_connector->ddc_bus) {
		amdgpu_connector->edid = drm_get_edid(connector,
						      &amdgpu_connector->ddc_bus->adapter);
	}

	if (!amdgpu_connector->edid) {
		/* some laptops provide a hardcoded edid in rom for LCDs */
		if (((connector->connector_type == DRM_MODE_CONNECTOR_LVDS) ||
		     (connector->connector_type == DRM_MODE_CONNECTOR_eDP)))
			amdgpu_connector->edid = amdgpu_connector_get_hardcoded_edid(adev);
	}
}

static void amdgpu_connector_free_edid(struct drm_connector *connector)
{
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);

	kfree(amdgpu_connector->edid);
	amdgpu_connector->edid = NULL;
}

static int amdgpu_connector_ddc_get_modes(struct drm_connector *connector)
{
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
	int ret;

	if (amdgpu_connector->edid) {
		drm_connector_update_edid_property(connector, amdgpu_connector->edid);
		ret = drm_add_edid_modes(connector, amdgpu_connector->edid);
		return ret;
	}
	drm_connector_update_edid_property(connector, NULL);
	return 0;
}

static struct drm_encoder *
amdgpu_connector_best_single_encoder(struct drm_connector *connector)
{
	struct drm_encoder *encoder;
	int i;

	/* pick the first one */
	drm_connector_for_each_possible_encoder(connector, encoder, i)
		return encoder;

	return NULL;
}

static void amdgpu_get_native_mode(struct drm_connector *connector)
{
	struct drm_encoder *encoder = amdgpu_connector_best_single_encoder(connector);
	struct amdgpu_encoder *amdgpu_encoder;

	if (encoder == NULL)
		return;

	amdgpu_encoder = to_amdgpu_encoder(encoder);

	if (!list_empty(&connector->probed_modes)) {
		struct drm_display_mode *preferred_mode =
			list_first_entry(&connector->probed_modes,
					 struct drm_display_mode, head);

		amdgpu_encoder->native_mode = *preferred_mode;
	} else {
		amdgpu_encoder->native_mode.clock = 0;
	}
}

static struct drm_display_mode *
amdgpu_connector_lcd_native_mode(struct drm_encoder *encoder)
{
	struct drm_device *dev = encoder->dev;
	struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
	struct drm_display_mode *mode = NULL;
	struct drm_display_mode *native_mode = &amdgpu_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_KMS("Adding native panel mode %s\n", mode->name);
	} else if (native_mode->hdisplay != 0 &&
		   native_mode->vdisplay != 0) {
		/* mac laptops without an edid */
		/* Note that this is not necessarily the exact panel mode,
		 * but an approximation based on the cvt formula.  For these
		 * systems we should ideally read the mode info out of the
		 * registers or add a mode table, but this works and is much
		 * simpler.
		 */
		mode = drm_cvt_mode(dev, native_mode->hdisplay, native_mode->vdisplay, 60, true, false, false);
		mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
		DRM_DEBUG_KMS("Adding cvt approximation of native panel mode %s\n", mode->name);
	}
	return mode;
}

static void amdgpu_connector_add_common_modes(struct drm_encoder *encoder,
					       struct drm_connector *connector)
{
	struct drm_device *dev = encoder->dev;
	struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
	struct drm_display_mode *mode = NULL;
	struct drm_display_mode *native_mode = &amdgpu_encoder->native_mode;
	int i;
	static const 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 (amdgpu_encoder->devices & (ATOM_DEVICE_TV_SUPPORT)) {
			if (common_modes[i].w > 1024 ||
			    common_modes[i].h > 768)
				continue;
		}
		if (amdgpu_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);
	}
}

static int amdgpu_connector_set_property(struct drm_connector *connector,
					  struct drm_property *property,
					  uint64_t val)
{
	struct drm_device *dev = connector->dev;
	struct amdgpu_device *adev = dev->dev_private;
	struct drm_encoder *encoder;
	struct amdgpu_encoder *amdgpu_encoder;

	if (property == adev->mode_info.coherent_mode_property) {
		struct amdgpu_encoder_atom_dig *dig;
		bool new_coherent_mode;

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

		amdgpu_encoder = to_amdgpu_encoder(encoder);

		if (!amdgpu_encoder->enc_priv)
			return 0;

		dig = amdgpu_encoder->enc_priv;
		new_coherent_mode = val ? true : false;
		if (dig->coherent_mode != new_coherent_mode) {
			dig->coherent_mode = new_coherent_mode;
			amdgpu_connector_property_change_mode(&amdgpu_encoder->base);
		}
	}

	if (property == adev->mode_info.audio_property) {
		struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
		/* need to find digital encoder on connector */
		encoder = amdgpu_connector_find_encoder(connector, DRM_MODE_ENCODER_TMDS);
		if (!encoder)
			return 0;

		amdgpu_encoder = to_amdgpu_encoder(encoder);

		if (amdgpu_connector->audio != val) {
			amdgpu_connector->audio = val;
			amdgpu_connector_property_change_mode(&amdgpu_encoder->base);
		}
	}

	if (property == adev->mode_info.dither_property) {
		struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
		/* need to find digital encoder on connector */
		encoder = amdgpu_connector_find_encoder(connector, DRM_MODE_ENCODER_TMDS);
		if (!encoder)
			return 0;

		amdgpu_encoder = to_amdgpu_encoder(encoder);

		if (amdgpu_connector->dither != val) {
			amdgpu_connector->dither = val;
			amdgpu_connector_property_change_mode(&amdgpu_encoder->base);
		}
	}

	if (property == adev->mode_info.underscan_property) {
		/* need to find digital encoder on connector */
		encoder = amdgpu_connector_find_encoder(connector, DRM_MODE_ENCODER_TMDS);
		if (!encoder)
			return 0;

		amdgpu_encoder = to_amdgpu_encoder(encoder);

		if (amdgpu_encoder->underscan_type != val) {
			amdgpu_encoder->underscan_type = val;
			amdgpu_connector_property_change_mode(&amdgpu_encoder->base);
		}
	}

	if (property == adev->mode_info.underscan_hborder_property) {
		/* need to find digital encoder on connector */
		encoder = amdgpu_connector_find_encoder(connector, DRM_MODE_ENCODER_TMDS);
		if (!encoder)
			return 0;

		amdgpu_encoder = to_amdgpu_encoder(encoder);

		if (amdgpu_encoder->underscan_hborder != val) {
			amdgpu_encoder->underscan_hborder = val;
			amdgpu_connector_property_change_mode(&amdgpu_encoder->base);
		}
	}

	if (property == adev->mode_info.underscan_vborder_property) {
		/* need to find digital encoder on connector */
		encoder = amdgpu_connector_find_encoder(connector, DRM_MODE_ENCODER_TMDS);
		if (!encoder)
			return 0;

		amdgpu_encoder = to_amdgpu_encoder(encoder);

		if (amdgpu_encoder->underscan_vborder != val) {
			amdgpu_encoder->underscan_vborder = val;
			amdgpu_connector_property_change_mode(&amdgpu_encoder->base);
		}
	}

	if (property == adev->mode_info.load_detect_property) {
		struct amdgpu_connector *amdgpu_connector =
			to_amdgpu_connector(connector);

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

	if (property == dev->mode_config.scaling_mode_property) {
		enum amdgpu_rmx_type rmx_type;

		if (connector->encoder) {
			amdgpu_encoder = to_amdgpu_encoder(connector->encoder);
		} else {
			const struct drm_connector_helper_funcs *connector_funcs = connector->helper_private;
			amdgpu_encoder = to_amdgpu_encoder(connector_funcs->best_encoder(connector));
		}

		switch (val) {
		default:
		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;
		case DRM_MODE_SCALE_FULLSCREEN: rmx_type = RMX_FULL; break;
		}
		if (amdgpu_encoder->rmx_type == rmx_type)
			return 0;

		if ((rmx_type != DRM_MODE_SCALE_NONE) &&
		    (amdgpu_encoder->native_mode.clock == 0))
			return 0;

		amdgpu_encoder->rmx_type = rmx_type;

		amdgpu_connector_property_change_mode(&amdgpu_encoder->base);
	}

	return 0;
}

static void
amdgpu_connector_fixup_lcd_native_mode(struct drm_encoder *encoder,
					struct drm_connector *connector)
{
	struct amdgpu_encoder *amdgpu_encoder =	to_amdgpu_encoder(encoder);
	struct drm_display_mode *native_mode = &amdgpu_encoder->native_mode;
	struct drm_display_mode *t, *mode;

	/* If the EDID preferred mode doesn't match the native mode, use it */
	list_for_each_entry_safe(mode, t, &connector->probed_modes, head) {
		if (mode->type & DRM_MODE_TYPE_PREFERRED) {
			if (mode->hdisplay != native_mode->hdisplay ||
			    mode->vdisplay != native_mode->vdisplay)
				memcpy(native_mode, mode, sizeof(*mode));
		}
	}

	/* Try to get native mode details from EDID if necessary */
	if (!native_mode->clock) {
		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_DEBUG_KMS("Determined LVDS native mode details from EDID\n");
				break;
			}
		}
	}

	if (!native_mode->clock) {
		DRM_DEBUG_KMS("No LVDS native mode details, disabling RMX\n");
		amdgpu_encoder->rmx_type = RMX_OFF;
	}
}

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

	amdgpu_connector_get_edid(connector);
	ret = amdgpu_connector_ddc_get_modes(connector);
	if (ret > 0) {
		encoder = amdgpu_connector_best_single_encoder(connector);
		if (encoder) {
			amdgpu_connector_fixup_lcd_native_mode(encoder, connector);
			/* add scaled modes */
			amdgpu_connector_add_common_modes(encoder, connector);
		}
		return ret;
	}

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

	/* we have no EDID modes */
	mode = amdgpu_connector_lcd_native_mode(encoder);
	if (mode) {
		ret = 1;
		drm_mode_probed_add(connector, mode);
		/* add the width/height from vbios tables if available */
		connector->display_info.width_mm = mode->width_mm;
		connector->display_info.height_mm = mode->height_mm;
		/* add scaled modes */
		amdgpu_connector_add_common_modes(encoder, connector);
	}

	return ret;
}

static enum drm_mode_status amdgpu_connector_lvds_mode_valid(struct drm_connector *connector,
					     struct drm_display_mode *mode)
{
	struct drm_encoder *encoder = amdgpu_connector_best_single_encoder(connector);

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

	if (encoder) {
		struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
		struct drm_display_mode *native_mode = &amdgpu_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 (amdgpu_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
amdgpu_connector_lvds_detect(struct drm_connector *connector, bool force)
{
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
	struct drm_encoder *encoder = amdgpu_connector_best_single_encoder(connector);
	enum drm_connector_status ret = connector_status_disconnected;
	int r;

	if (!drm_kms_helper_is_poll_worker()) {
		r = pm_runtime_get_sync(connector->dev->dev);
		if (r < 0)
			return connector_status_disconnected;
	}

	if (encoder) {
		struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
		struct drm_display_mode *native_mode = &amdgpu_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 */
	amdgpu_connector_get_edid(connector);
	if (amdgpu_connector->edid)
		ret = connector_status_connected;
	/* check acpi lid status ??? */

	amdgpu_connector_update_scratch_regs(connector, ret);

	if (!drm_kms_helper_is_poll_worker()) {
		pm_runtime_mark_last_busy(connector->dev->dev);
		pm_runtime_put_autosuspend(connector->dev->dev);
	}

	return ret;
}

static void amdgpu_connector_unregister(struct drm_connector *connector)
{
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);

	if (amdgpu_connector->ddc_bus && amdgpu_connector->ddc_bus->has_aux) {
		drm_dp_aux_unregister(&amdgpu_connector->ddc_bus->aux);
		amdgpu_connector->ddc_bus->has_aux = false;
	}
}

static void amdgpu_connector_destroy(struct drm_connector *connector)
{
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);

	amdgpu_connector_free_edid(connector);
	kfree(amdgpu_connector->con_priv);
	drm_connector_unregister(connector);
	drm_connector_cleanup(connector);
	kfree(connector);
}

static int amdgpu_connector_set_lcd_property(struct drm_connector *connector,
					      struct drm_property *property,
					      uint64_t value)
{
	struct drm_device *dev = connector->dev;
	struct amdgpu_encoder *amdgpu_encoder;
	enum amdgpu_rmx_type rmx_type;

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

	if (connector->encoder)
		amdgpu_encoder = to_amdgpu_encoder(connector->encoder);
	else {
		const struct drm_connector_helper_funcs *connector_funcs = connector->helper_private;
		amdgpu_encoder = to_amdgpu_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 (amdgpu_encoder->rmx_type == rmx_type)
		return 0;

	amdgpu_encoder->rmx_type = rmx_type;

	amdgpu_connector_property_change_mode(&amdgpu_encoder->base);
	return 0;
}


static const struct drm_connector_helper_funcs amdgpu_connector_lvds_helper_funcs = {
	.get_modes = amdgpu_connector_lvds_get_modes,
	.mode_valid = amdgpu_connector_lvds_mode_valid,
	.best_encoder = amdgpu_connector_best_single_encoder,
};

static const struct drm_connector_funcs amdgpu_connector_lvds_funcs = {
	.dpms = drm_helper_connector_dpms,
	.detect = amdgpu_connector_lvds_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.early_unregister = amdgpu_connector_unregister,
	.destroy = amdgpu_connector_destroy,
	.set_property = amdgpu_connector_set_lcd_property,
};

static int amdgpu_connector_vga_get_modes(struct drm_connector *connector)
{
	int ret;

	amdgpu_connector_get_edid(connector);
	ret = amdgpu_connector_ddc_get_modes(connector);

	return ret;
}

static enum drm_mode_status amdgpu_connector_vga_mode_valid(struct drm_connector *connector,
					    struct drm_display_mode *mode)
{
	struct drm_device *dev = connector->dev;
	struct amdgpu_device *adev = dev->dev_private;

	/* XXX check mode bandwidth */

	if ((mode->clock / 10) > adev->clock.max_pixel_clock)
		return MODE_CLOCK_HIGH;

	return MODE_OK;
}

static enum drm_connector_status
amdgpu_connector_vga_detect(struct drm_connector *connector, bool force)
{
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
	struct drm_encoder *encoder;
	const struct drm_encoder_helper_funcs *encoder_funcs;
	bool dret = false;
	enum drm_connector_status ret = connector_status_disconnected;
	int r;

	if (!drm_kms_helper_is_poll_worker()) {
		r = pm_runtime_get_sync(connector->dev->dev);
		if (r < 0)
			return connector_status_disconnected;
	}

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

	if (amdgpu_connector->ddc_bus)
		dret = amdgpu_display_ddc_probe(amdgpu_connector, false);
	if (dret) {
		amdgpu_connector->detected_by_load = false;
		amdgpu_connector_free_edid(connector);
		amdgpu_connector_get_edid(connector);

		if (!amdgpu_connector->edid) {
			DRM_ERROR("%s: probed a monitor but no|invalid EDID\n",
					connector->name);
			ret = connector_status_connected;
		} else {
			amdgpu_connector->use_digital =
				!!(amdgpu_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 (amdgpu_connector->use_digital && amdgpu_connector->shared_ddc) {
				amdgpu_connector_free_edid(connector);
				ret = connector_status_disconnected;
			} else {
				ret = connector_status_connected;
			}
		}
	} else {

		/* if we aren't forcing don't do destructive polling */
		if (!force) {
			/* only return the previous status if we last
			 * detected a monitor via load.
			 */
			if (amdgpu_connector->detected_by_load)
				ret = connector->status;
			goto out;
		}

		if (amdgpu_connector->dac_load_detect && encoder) {
			encoder_funcs = encoder->helper_private;
			ret = encoder_funcs->detect(encoder, connector);
			if (ret != connector_status_disconnected)
				amdgpu_connector->detected_by_load = true;
		}
	}

	amdgpu_connector_update_scratch_regs(connector, ret);

out:
	if (!drm_kms_helper_is_poll_worker()) {
		pm_runtime_mark_last_busy(connector->dev->dev);
		pm_runtime_put_autosuspend(connector->dev->dev);
	}

	return ret;
}

static const struct drm_connector_helper_funcs amdgpu_connector_vga_helper_funcs = {
	.get_modes = amdgpu_connector_vga_get_modes,
	.mode_valid = amdgpu_connector_vga_mode_valid,
	.best_encoder = amdgpu_connector_best_single_encoder,
};

static const struct drm_connector_funcs amdgpu_connector_vga_funcs = {
	.dpms = drm_helper_connector_dpms,
	.detect = amdgpu_connector_vga_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.early_unregister = amdgpu_connector_unregister,
	.destroy = amdgpu_connector_destroy,
	.set_property = amdgpu_connector_set_property,
};

static bool
amdgpu_connector_check_hpd_status_unchanged(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct amdgpu_device *adev = dev->dev_private;
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
	enum drm_connector_status status;

	if (amdgpu_connector->hpd.hpd != AMDGPU_HPD_NONE) {
		if (amdgpu_display_hpd_sense(adev, amdgpu_connector->hpd.hpd))
			status = connector_status_connected;
		else
			status = connector_status_disconnected;
		if (connector->status == status)
			return true;
	}

	return false;
}

/*
 * 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
amdgpu_connector_dvi_detect(struct drm_connector *connector, bool force)
{
	struct drm_device *dev = connector->dev;
	struct amdgpu_device *adev = dev->dev_private;
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
	const struct drm_encoder_helper_funcs *encoder_funcs;
	int r;
	enum drm_connector_status ret = connector_status_disconnected;
	bool dret = false, broken_edid = false;

	if (!drm_kms_helper_is_poll_worker()) {
		r = pm_runtime_get_sync(connector->dev->dev);
		if (r < 0)
			return connector_status_disconnected;
	}

	if (!force && amdgpu_connector_check_hpd_status_unchanged(connector)) {
		ret = connector->status;
		goto exit;
	}

	if (amdgpu_connector->ddc_bus)
		dret = amdgpu_display_ddc_probe(amdgpu_connector, false);
	if (dret) {
		amdgpu_connector->detected_by_load = false;
		amdgpu_connector_free_edid(connector);
		amdgpu_connector_get_edid(connector);

		if (!amdgpu_connector->edid) {
			DRM_ERROR("%s: probed a monitor but no|invalid EDID\n",
					connector->name);
			ret = connector_status_connected;
			broken_edid = true; /* defer use_digital to later */
		} else {
			amdgpu_connector->use_digital =
				!!(amdgpu_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 ((!amdgpu_connector->use_digital) && amdgpu_connector->shared_ddc) {
				amdgpu_connector_free_edid(connector);
				ret = connector_status_disconnected;
			} else {
				ret = connector_status_connected;
			}

			/* This gets complicated.  We have boards with VGA + HDMI with a
			 * shared DDC line and we have boards with DVI-D + HDMI with a shared
			 * DDC line.  The latter is more complex because with DVI<->HDMI adapters
			 * you don't really know what's connected to which port as both are digital.
			 */
			if (amdgpu_connector->shared_ddc && (ret == connector_status_connected)) {
				struct drm_connector *list_connector;
				struct amdgpu_connector *list_amdgpu_connector;
				list_for_each_entry(list_connector, &dev->mode_config.connector_list, head) {
					if (connector == list_connector)
						continue;
					list_amdgpu_connector = to_amdgpu_connector(list_connector);
					if (list_amdgpu_connector->shared_ddc &&
					    (list_amdgpu_connector->ddc_bus->rec.i2c_id ==
					     amdgpu_connector->ddc_bus->rec.i2c_id)) {
						/* cases where both connectors are digital */
						if (list_connector->connector_type != DRM_MODE_CONNECTOR_VGA) {
							/* hpd is our only option in this case */
							if (!amdgpu_display_hpd_sense(adev, amdgpu_connector->hpd.hpd)) {
								amdgpu_connector_free_edid(connector);
								ret = connector_status_disconnected;
							}
						}
					}
				}
			}
		}
	}

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

	/* DVI-D and HDMI-A are digital only */
	if ((connector->connector_type == DRM_MODE_CONNECTOR_DVID) ||
	    (connector->connector_type == DRM_MODE_CONNECTOR_HDMIA))
		goto out;

	/* if we aren't forcing don't do destructive polling */
	if (!force) {
		/* only return the previous status if we last
		 * detected a monitor via load.
		 */
		if (amdgpu_connector->detected_by_load)
			ret = connector->status;
		goto out;
	}

	/* find analog encoder */
	if (amdgpu_connector->dac_load_detect) {
		struct drm_encoder *encoder;
		int i;

		drm_connector_for_each_possible_encoder(connector, encoder, i) {
			if (encoder->encoder_type != DRM_MODE_ENCODER_DAC &&
			    encoder->encoder_type != DRM_MODE_ENCODER_TVDAC)
				continue;

			encoder_funcs = encoder->helper_private;
			if (encoder_funcs->detect) {
				if (!broken_edid) {
					if (ret != connector_status_connected) {
						/* deal with analog monitors without DDC */
						ret = encoder_funcs->detect(encoder, connector);
						if (ret == connector_status_connected) {
							amdgpu_connector->use_digital = false;
						}
						if (ret != connector_status_disconnected)
							amdgpu_connector->detected_by_load = true;
					}
				} else {
					enum drm_connector_status lret;
					/* assume digital unless load detected otherwise */
					amdgpu_connector->use_digital = true;
					lret = encoder_funcs->detect(encoder, connector);
					DRM_DEBUG_KMS("load_detect %x returned: %x\n",encoder->encoder_type,lret);
					if (lret == connector_status_connected)
						amdgpu_connector->use_digital = false;
				}
				break;
			}
		}
	}

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

exit:
	if (!drm_kms_helper_is_poll_worker()) {
		pm_runtime_mark_last_busy(connector->dev->dev);
		pm_runtime_put_autosuspend(connector->dev->dev);
	}

	return ret;
}

/* okay need to be smart in here about which encoder to pick */
static struct drm_encoder *
amdgpu_connector_dvi_encoder(struct drm_connector *connector)
{
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
	struct drm_encoder *encoder;
	int i;

	drm_connector_for_each_possible_encoder(connector, encoder, i) {
		if (amdgpu_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 */
	drm_connector_for_each_possible_encoder(connector, encoder, i)
		return encoder;

	return NULL;
}

static void amdgpu_connector_dvi_force(struct drm_connector *connector)
{
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
	if (connector->force == DRM_FORCE_ON)
		amdgpu_connector->use_digital = false;
	if (connector->force == DRM_FORCE_ON_DIGITAL)
		amdgpu_connector->use_digital = true;
}

static enum drm_mode_status amdgpu_connector_dvi_mode_valid(struct drm_connector *connector,
					    struct drm_display_mode *mode)
{
	struct drm_device *dev = connector->dev;
	struct amdgpu_device *adev = dev->dev_private;
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);

	/* XXX check mode bandwidth */

	if (amdgpu_connector->use_digital && (mode->clock > 165000)) {
		if ((amdgpu_connector->connector_object_id == CONNECTOR_OBJECT_ID_DUAL_LINK_DVI_I) ||
		    (amdgpu_connector->connector_object_id == CONNECTOR_OBJECT_ID_DUAL_LINK_DVI_D) ||
		    (amdgpu_connector->connector_object_id == CONNECTOR_OBJECT_ID_HDMI_TYPE_B)) {
			return MODE_OK;
		} else if (drm_detect_hdmi_monitor(amdgpu_connector_edid(connector))) {
			/* HDMI 1.3+ supports max clock of 340 Mhz */
			if (mode->clock > 340000)
				return MODE_CLOCK_HIGH;
			else
				return MODE_OK;
		} else {
			return MODE_CLOCK_HIGH;
		}
	}

	/* check against the max pixel clock */
	if ((mode->clock / 10) > adev->clock.max_pixel_clock)
		return MODE_CLOCK_HIGH;

	return MODE_OK;
}

static const struct drm_connector_helper_funcs amdgpu_connector_dvi_helper_funcs = {
	.get_modes = amdgpu_connector_vga_get_modes,
	.mode_valid = amdgpu_connector_dvi_mode_valid,
	.best_encoder = amdgpu_connector_dvi_encoder,
};

static const struct drm_connector_funcs amdgpu_connector_dvi_funcs = {
	.dpms = drm_helper_connector_dpms,
	.detect = amdgpu_connector_dvi_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.set_property = amdgpu_connector_set_property,
	.early_unregister = amdgpu_connector_unregister,
	.destroy = amdgpu_connector_destroy,
	.force = amdgpu_connector_dvi_force,
};

static int amdgpu_connector_dp_get_modes(struct drm_connector *connector)
{
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
	struct amdgpu_connector_atom_dig *amdgpu_dig_connector = amdgpu_connector->con_priv;
	struct drm_encoder *encoder = amdgpu_connector_best_single_encoder(connector);
	int ret;

	if ((connector->connector_type == DRM_MODE_CONNECTOR_eDP) ||
	    (connector->connector_type == DRM_MODE_CONNECTOR_LVDS)) {
		struct drm_display_mode *mode;

		if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
			if (!amdgpu_dig_connector->edp_on)
				amdgpu_atombios_encoder_set_edp_panel_power(connector,
								     ATOM_TRANSMITTER_ACTION_POWER_ON);
			amdgpu_connector_get_edid(connector);
			ret = amdgpu_connector_ddc_get_modes(connector);
			if (!amdgpu_dig_connector->edp_on)
				amdgpu_atombios_encoder_set_edp_panel_power(connector,
								     ATOM_TRANSMITTER_ACTION_POWER_OFF);
		} else {
			/* need to setup ddc on the bridge */
			if (amdgpu_connector_encoder_get_dp_bridge_encoder_id(connector) !=
			    ENCODER_OBJECT_ID_NONE) {
				if (encoder)
					amdgpu_atombios_encoder_setup_ext_encoder_ddc(encoder);
			}
			amdgpu_connector_get_edid(connector);
			ret = amdgpu_connector_ddc_get_modes(connector);
		}

		if (ret > 0) {
			if (encoder) {
				amdgpu_connector_fixup_lcd_native_mode(encoder, connector);
				/* add scaled modes */
				amdgpu_connector_add_common_modes(encoder, connector);
			}
			return ret;
		}

		if (!encoder)
			return 0;

		/* we have no EDID modes */
		mode = amdgpu_connector_lcd_native_mode(encoder);
		if (mode) {
			ret = 1;
			drm_mode_probed_add(connector, mode);
			/* add the width/height from vbios tables if available */
			connector->display_info.width_mm = mode->width_mm;
			connector->display_info.height_mm = mode->height_mm;
			/* add scaled modes */
			amdgpu_connector_add_common_modes(encoder, connector);
		}
	} else {
		/* need to setup ddc on the bridge */
		if (amdgpu_connector_encoder_get_dp_bridge_encoder_id(connector) !=
			ENCODER_OBJECT_ID_NONE) {
			if (encoder)
				amdgpu_atombios_encoder_setup_ext_encoder_ddc(encoder);
		}
		amdgpu_connector_get_edid(connector);
		ret = amdgpu_connector_ddc_get_modes(connector);

		amdgpu_get_native_mode(connector);
	}

	return ret;
}

u16 amdgpu_connector_encoder_get_dp_bridge_encoder_id(struct drm_connector *connector)
{
	struct drm_encoder *encoder;
	struct amdgpu_encoder *amdgpu_encoder;
	int i;

	drm_connector_for_each_possible_encoder(connector, encoder, i) {
		amdgpu_encoder = to_amdgpu_encoder(encoder);

		switch (amdgpu_encoder->encoder_id) {
		case ENCODER_OBJECT_ID_TRAVIS:
		case ENCODER_OBJECT_ID_NUTMEG:
			return amdgpu_encoder->encoder_id;
		default:
			break;
		}
	}

	return ENCODER_OBJECT_ID_NONE;
}

static bool amdgpu_connector_encoder_is_hbr2(struct drm_connector *connector)
{
	struct drm_encoder *encoder;
	struct amdgpu_encoder *amdgpu_encoder;
	int i;
	bool found = false;

	drm_connector_for_each_possible_encoder(connector, encoder, i) {
		amdgpu_encoder = to_amdgpu_encoder(encoder);
		if (amdgpu_encoder->caps & ATOM_ENCODER_CAP_RECORD_HBR2)
			found = true;
	}

	return found;
}

bool amdgpu_connector_is_dp12_capable(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct amdgpu_device *adev = dev->dev_private;

	if ((adev->clock.default_dispclk >= 53900) &&
	    amdgpu_connector_encoder_is_hbr2(connector)) {
		return true;
	}

	return false;
}

static enum drm_connector_status
amdgpu_connector_dp_detect(struct drm_connector *connector, bool force)
{
	struct drm_device *dev = connector->dev;
	struct amdgpu_device *adev = dev->dev_private;
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
	enum drm_connector_status ret = connector_status_disconnected;
	struct amdgpu_connector_atom_dig *amdgpu_dig_connector = amdgpu_connector->con_priv;
	struct drm_encoder *encoder = amdgpu_connector_best_single_encoder(connector);
	int r;

	if (!drm_kms_helper_is_poll_worker()) {
		r = pm_runtime_get_sync(connector->dev->dev);
		if (r < 0)
			return connector_status_disconnected;
	}

	if (!force && amdgpu_connector_check_hpd_status_unchanged(connector)) {
		ret = connector->status;
		goto out;
	}

	amdgpu_connector_free_edid(connector);

	if ((connector->connector_type == DRM_MODE_CONNECTOR_eDP) ||
	    (connector->connector_type == DRM_MODE_CONNECTOR_LVDS)) {
		if (encoder) {
			struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
			struct drm_display_mode *native_mode = &amdgpu_encoder->native_mode;

			/* check if panel is valid */
			if (native_mode->hdisplay >= 320 && native_mode->vdisplay >= 240)
				ret = connector_status_connected;
		}
		/* eDP is always DP */
		amdgpu_dig_connector->dp_sink_type = CONNECTOR_OBJECT_ID_DISPLAYPORT;
		if (!amdgpu_dig_connector->edp_on)
			amdgpu_atombios_encoder_set_edp_panel_power(connector,
							     ATOM_TRANSMITTER_ACTION_POWER_ON);
		if (!amdgpu_atombios_dp_get_dpcd(amdgpu_connector))
			ret = connector_status_connected;
		if (!amdgpu_dig_connector->edp_on)
			amdgpu_atombios_encoder_set_edp_panel_power(connector,
							     ATOM_TRANSMITTER_ACTION_POWER_OFF);
	} else if (amdgpu_connector_encoder_get_dp_bridge_encoder_id(connector) !=
		   ENCODER_OBJECT_ID_NONE) {
		/* DP bridges are always DP */
		amdgpu_dig_connector->dp_sink_type = CONNECTOR_OBJECT_ID_DISPLAYPORT;
		/* get the DPCD from the bridge */
		amdgpu_atombios_dp_get_dpcd(amdgpu_connector);

		if (encoder) {
			/* setup ddc on the bridge */
			amdgpu_atombios_encoder_setup_ext_encoder_ddc(encoder);
			/* bridge chips are always aux */
			/* try DDC */
			if (amdgpu_display_ddc_probe(amdgpu_connector, true))
				ret = connector_status_connected;
			else if (amdgpu_connector->dac_load_detect) { /* try load detection */
				const struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
				ret = encoder_funcs->detect(encoder, connector);
			}
		}
	} else {
		amdgpu_dig_connector->dp_sink_type =
			amdgpu_atombios_dp_get_sinktype(amdgpu_connector);
		if (amdgpu_display_hpd_sense(adev, amdgpu_connector->hpd.hpd)) {
			ret = connector_status_connected;
			if (amdgpu_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT)
				amdgpu_atombios_dp_get_dpcd(amdgpu_connector);
		} else {
			if (amdgpu_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) {
				if (!amdgpu_atombios_dp_get_dpcd(amdgpu_connector))
					ret = connector_status_connected;
			} else {
				/* try non-aux ddc (DP to DVI/HDMI/etc. adapter) */
				if (amdgpu_display_ddc_probe(amdgpu_connector,
							     false))
					ret = connector_status_connected;
			}
		}
	}

	amdgpu_connector_update_scratch_regs(connector, ret);
out:
	if (!drm_kms_helper_is_poll_worker()) {
		pm_runtime_mark_last_busy(connector->dev->dev);
		pm_runtime_put_autosuspend(connector->dev->dev);
	}

	return ret;
}

static enum drm_mode_status amdgpu_connector_dp_mode_valid(struct drm_connector *connector,
					   struct drm_display_mode *mode)
{
	struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
	struct amdgpu_connector_atom_dig *amdgpu_dig_connector = amdgpu_connector->con_priv;

	/* XXX check mode bandwidth */

	if ((connector->connector_type == DRM_MODE_CONNECTOR_eDP) ||
	    (connector->connector_type == DRM_MODE_CONNECTOR_LVDS)) {
		struct drm_encoder *encoder = amdgpu_connector_best_single_encoder(connector);

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

		if (encoder) {
			struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
			struct drm_display_mode *native_mode = &amdgpu_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 (amdgpu_encoder->rmx_type == RMX_OFF) {
				if ((mode->hdisplay != native_mode->hdisplay) ||
				    (mode->vdisplay != native_mode->vdisplay))
					return MODE_PANEL;
			}
		}
		return MODE_OK;
	} else {
		if ((amdgpu_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) ||
		    (amdgpu_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP)) {
			return amdgpu_atombios_dp_mode_valid_helper(connector, mode);
		} else {
			if (drm_detect_hdmi_monitor(amdgpu_connector_edid(connector))) {
				/* HDMI 1.3+ supports max clock of 340 Mhz */
				if (mode->clock > 340000)
					return MODE_CLOCK_HIGH;
			} else {
				if (mode->clock > 165000)
					return MODE_CLOCK_HIGH;
			}
		}
	}

	return MODE_OK;
}

static const struct drm_connector_helper_funcs amdgpu_connector_dp_helper_funcs = {
	.get_modes = amdgpu_connector_dp_get_modes,
	.mode_valid = amdgpu_connector_dp_mode_valid,
	.best_encoder = amdgpu_connector_dvi_encoder,
};

static const struct drm_connector_funcs amdgpu_connector_dp_funcs = {
	.dpms = drm_helper_connector_dpms,
	.detect = amdgpu_connector_dp_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.set_property = amdgpu_connector_set_property,
	.early_unregister = amdgpu_connector_unregister,
	.destroy = amdgpu_connector_destroy,
	.force = amdgpu_connector_dvi_force,
};

static const struct drm_connector_funcs amdgpu_connector_edp_funcs = {
	.dpms = drm_helper_connector_dpms,
	.detect = amdgpu_connector_dp_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.set_property = amdgpu_connector_set_lcd_property,
	.early_unregister = amdgpu_connector_unregister,
	.destroy = amdgpu_connector_destroy,
	.force = amdgpu_connector_dvi_force,
};

void
amdgpu_connector_add(struct amdgpu_device *adev,
		      uint32_t connector_id,
		      uint32_t supported_device,
		      int connector_type,
		      struct amdgpu_i2c_bus_rec *i2c_bus,
		      uint16_t connector_object_id,
		      struct amdgpu_hpd *hpd,
		      struct amdgpu_router *router)
{
	struct drm_device *dev = adev->ddev;
	struct drm_connector *connector;
	struct amdgpu_connector *amdgpu_connector;
	struct amdgpu_connector_atom_dig *amdgpu_dig_connector;
	struct drm_encoder *encoder;
	struct amdgpu_encoder *amdgpu_encoder;
	uint32_t subpixel_order = SubPixelNone;
	bool shared_ddc = false;
	bool is_dp_bridge = false;
	bool has_aux = false;

	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) {
		amdgpu_connector = to_amdgpu_connector(connector);
		if (amdgpu_connector->connector_id == connector_id) {
			amdgpu_connector->devices |= supported_device;
			return;
		}
		if (amdgpu_connector->ddc_bus && i2c_bus->valid) {
			if (amdgpu_connector->ddc_bus->rec.i2c_id == i2c_bus->i2c_id) {
				amdgpu_connector->shared_ddc = true;
				shared_ddc = true;
			}
			if (amdgpu_connector->router_bus && router->ddc_valid &&
			    (amdgpu_connector->router.router_id == router->router_id)) {
				amdgpu_connector->shared_ddc = false;
				shared_ddc = false;
			}
		}
	}

	/* check if it's a dp bridge */
	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
		amdgpu_encoder = to_amdgpu_encoder(encoder);
		if (amdgpu_encoder->devices & supported_device) {
			switch (amdgpu_encoder->encoder_id) {
			case ENCODER_OBJECT_ID_TRAVIS:
			case ENCODER_OBJECT_ID_NUTMEG:
				is_dp_bridge = true;
				break;
			default:
				break;
			}
		}
	}

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

	connector = &amdgpu_connector->base;

	amdgpu_connector->connector_id = connector_id;
	amdgpu_connector->devices = supported_device;
	amdgpu_connector->shared_ddc = shared_ddc;
	amdgpu_connector->connector_object_id = connector_object_id;
	amdgpu_connector->hpd = *hpd;

	amdgpu_connector->router = *router;
	if (router->ddc_valid || router->cd_valid) {
		amdgpu_connector->router_bus = amdgpu_i2c_lookup(adev, &router->i2c_info);
		if (!amdgpu_connector->router_bus)
			DRM_ERROR("Failed to assign router i2c bus! Check dmesg for i2c errors.\n");
	}

	if (is_dp_bridge) {
		amdgpu_dig_connector = kzalloc(sizeof(struct amdgpu_connector_atom_dig), GFP_KERNEL);
		if (!amdgpu_dig_connector)
			goto failed;
		amdgpu_connector->con_priv = amdgpu_dig_connector;
		if (i2c_bus->valid) {
			amdgpu_connector->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
			if (amdgpu_connector->ddc_bus)
				has_aux = true;
			else
				DRM_ERROR("DP: Failed to assign ddc bus! Check dmesg for i2c errors.\n");
		}
		switch (connector_type) {
		case DRM_MODE_CONNECTOR_VGA:
		case DRM_MODE_CONNECTOR_DVIA:
		default:
			drm_connector_init(dev, &amdgpu_connector->base,
					   &amdgpu_connector_dp_funcs, connector_type);
			drm_connector_helper_add(&amdgpu_connector->base,
						 &amdgpu_connector_dp_helper_funcs);
			connector->interlace_allowed = true;
			connector->doublescan_allowed = true;
			amdgpu_connector->dac_load_detect = true;
			drm_object_attach_property(&amdgpu_connector->base.base,
						      adev->mode_info.load_detect_property,
						      1);
			drm_object_attach_property(&amdgpu_connector->base.base,
						   dev->mode_config.scaling_mode_property,
						   DRM_MODE_SCALE_NONE);
			break;
		case DRM_MODE_CONNECTOR_DVII:
		case DRM_MODE_CONNECTOR_DVID:
		case DRM_MODE_CONNECTOR_HDMIA:
		case DRM_MODE_CONNECTOR_HDMIB:
		case DRM_MODE_CONNECTOR_DisplayPort:
			drm_connector_init(dev, &amdgpu_connector->base,
					   &amdgpu_connector_dp_funcs, connector_type);
			drm_connector_helper_add(&amdgpu_connector->base,
						 &amdgpu_connector_dp_helper_funcs);
			drm_object_attach_property(&amdgpu_connector->base.base,
						      adev->mode_info.underscan_property,
						      UNDERSCAN_OFF);
			drm_object_attach_property(&amdgpu_connector->base.base,
						      adev->mode_info.underscan_hborder_property,
						      0);
			drm_object_attach_property(&amdgpu_connector->base.base,
						      adev->mode_info.underscan_vborder_property,
						      0);

			drm_object_attach_property(&amdgpu_connector->base.base,
						   dev->mode_config.scaling_mode_property,
						   DRM_MODE_SCALE_NONE);

			drm_object_attach_property(&amdgpu_connector->base.base,
						   adev->mode_info.dither_property,
						   AMDGPU_FMT_DITHER_DISABLE);

			if (amdgpu_audio != 0)
				drm_object_attach_property(&amdgpu_connector->base.base,
							   adev->mode_info.audio_property,
							   AMDGPU_AUDIO_AUTO);

			subpixel_order = SubPixelHorizontalRGB;
			connector->interlace_allowed = true;
			if (connector_type == DRM_MODE_CONNECTOR_HDMIB)
				connector->doublescan_allowed = true;
			else
				connector->doublescan_allowed = false;
			if (connector_type == DRM_MODE_CONNECTOR_DVII) {
				amdgpu_connector->dac_load_detect = true;
				drm_object_attach_property(&amdgpu_connector->base.base,
							      adev->mode_info.load_detect_property,
							      1);
			}
			break;
		case DRM_MODE_CONNECTOR_LVDS:
		case DRM_MODE_CONNECTOR_eDP:
			drm_connector_init(dev, &amdgpu_connector->base,
					   &amdgpu_connector_edp_funcs, connector_type);
			drm_connector_helper_add(&amdgpu_connector->base,
						 &amdgpu_connector_dp_helper_funcs);
			drm_object_attach_property(&amdgpu_connector->base.base,
						      dev->mode_config.scaling_mode_property,
						      DRM_MODE_SCALE_FULLSCREEN);
			subpixel_order = SubPixelHorizontalRGB;
			connector->interlace_allowed = false;
			connector->doublescan_allowed = false;
			break;
		}
	} else {
		switch (connector_type) {
		case DRM_MODE_CONNECTOR_VGA:
			drm_connector_init(dev, &amdgpu_connector->base, &amdgpu_connector_vga_funcs, connector_type);
			drm_connector_helper_add(&amdgpu_connector->base, &amdgpu_connector_vga_helper_funcs);
			if (i2c_bus->valid) {
				amdgpu_connector->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
				if (!amdgpu_connector->ddc_bus)
					DRM_ERROR("VGA: Failed to assign ddc bus! Check dmesg for i2c errors.\n");
			}
			amdgpu_connector->dac_load_detect = true;
			drm_object_attach_property(&amdgpu_connector->base.base,
						      adev->mode_info.load_detect_property,
						      1);
			drm_object_attach_property(&amdgpu_connector->base.base,
						   dev->mode_config.scaling_mode_property,
						   DRM_MODE_SCALE_NONE);
			/* no HPD on analog connectors */
			amdgpu_connector->hpd.hpd = AMDGPU_HPD_NONE;
			connector->interlace_allowed = true;
			connector->doublescan_allowed = true;
			break;
		case DRM_MODE_CONNECTOR_DVIA:
			drm_connector_init(dev, &amdgpu_connector->base, &amdgpu_connector_vga_funcs, connector_type);
			drm_connector_helper_add(&amdgpu_connector->base, &amdgpu_connector_vga_helper_funcs);
			if (i2c_bus->valid) {
				amdgpu_connector->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
				if (!amdgpu_connector->ddc_bus)
					DRM_ERROR("DVIA: Failed to assign ddc bus! Check dmesg for i2c errors.\n");
			}
			amdgpu_connector->dac_load_detect = true;
			drm_object_attach_property(&amdgpu_connector->base.base,
						      adev->mode_info.load_detect_property,
						      1);
			drm_object_attach_property(&amdgpu_connector->base.base,
						   dev->mode_config.scaling_mode_property,
						   DRM_MODE_SCALE_NONE);
			/* no HPD on analog connectors */
			amdgpu_connector->hpd.hpd = AMDGPU_HPD_NONE;
			connector->interlace_allowed = true;
			connector->doublescan_allowed = true;
			break;
		case DRM_MODE_CONNECTOR_DVII:
		case DRM_MODE_CONNECTOR_DVID:
			amdgpu_dig_connector = kzalloc(sizeof(struct amdgpu_connector_atom_dig), GFP_KERNEL);
			if (!amdgpu_dig_connector)
				goto failed;
			amdgpu_connector->con_priv = amdgpu_dig_connector;
			drm_connector_init(dev, &amdgpu_connector->base, &amdgpu_connector_dvi_funcs, connector_type);
			drm_connector_helper_add(&amdgpu_connector->base, &amdgpu_connector_dvi_helper_funcs);
			if (i2c_bus->valid) {
				amdgpu_connector->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
				if (!amdgpu_connector->ddc_bus)
					DRM_ERROR("DVI: Failed to assign ddc bus! Check dmesg for i2c errors.\n");
			}
			subpixel_order = SubPixelHorizontalRGB;
			drm_object_attach_property(&amdgpu_connector->base.base,
						      adev->mode_info.coherent_mode_property,
						      1);
			drm_object_attach_property(&amdgpu_connector->base.base,
						   adev->mode_info.underscan_property,
						   UNDERSCAN_OFF);
			drm_object_attach_property(&amdgpu_connector->base.base,
						   adev->mode_info.underscan_hborder_property,
						   0);
			drm_object_attach_property(&amdgpu_connector->base.base,
						   adev->mode_info.underscan_vborder_property,
						   0);
			drm_object_attach_property(&amdgpu_connector->base.base,
						   dev->mode_config.scaling_mode_property,
						   DRM_MODE_SCALE_NONE);

			if (amdgpu_audio != 0) {
				drm_object_attach_property(&amdgpu_connector->base.base,
							   adev->mode_info.audio_property,
							   AMDGPU_AUDIO_AUTO);
			}
			drm_object_attach_property(&amdgpu_connector->base.base,
						   adev->mode_info.dither_property,
						   AMDGPU_FMT_DITHER_DISABLE);
			if (connector_type == DRM_MODE_CONNECTOR_DVII) {
				amdgpu_connector->dac_load_detect = true;
				drm_object_attach_property(&amdgpu_connector->base.base,
							   adev->mode_info.load_detect_property,
							   1);
			}
			connector->interlace_allowed = true;
			if (connector_type == DRM_MODE_CONNECTOR_DVII)
				connector->doublescan_allowed = true;
			else
				connector->doublescan_allowed = false;
			break;
		case DRM_MODE_CONNECTOR_HDMIA:
		case DRM_MODE_CONNECTOR_HDMIB:
			amdgpu_dig_connector = kzalloc(sizeof(struct amdgpu_connector_atom_dig), GFP_KERNEL);
			if (!amdgpu_dig_connector)
				goto failed;
			amdgpu_connector->con_priv = amdgpu_dig_connector;
			drm_connector_init(dev, &amdgpu_connector->base, &amdgpu_connector_dvi_funcs, connector_type);
			drm_connector_helper_add(&amdgpu_connector->base, &amdgpu_connector_dvi_helper_funcs);
			if (i2c_bus->valid) {
				amdgpu_connector->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
				if (!amdgpu_connector->ddc_bus)
					DRM_ERROR("HDMI: Failed to assign ddc bus! Check dmesg for i2c errors.\n");
			}
			drm_object_attach_property(&amdgpu_connector->base.base,
						      adev->mode_info.coherent_mode_property,
						      1);
			drm_object_attach_property(&amdgpu_connector->base.base,
						   adev->mode_info.underscan_property,
						   UNDERSCAN_OFF);
			drm_object_attach_property(&amdgpu_connector->base.base,
						   adev->mode_info.underscan_hborder_property,
						   0);
			drm_object_attach_property(&amdgpu_connector->base.base,
						   adev->mode_info.underscan_vborder_property,
						   0);
			drm_object_attach_property(&amdgpu_connector->base.base,
						   dev->mode_config.scaling_mode_property,
						   DRM_MODE_SCALE_NONE);
			if (amdgpu_audio != 0) {
				drm_object_attach_property(&amdgpu_connector->base.base,
							   adev->mode_info.audio_property,
							   AMDGPU_AUDIO_AUTO);
			}
			drm_object_attach_property(&amdgpu_connector->base.base,
						   adev->mode_info.dither_property,
						   AMDGPU_FMT_DITHER_DISABLE);
			subpixel_order = SubPixelHorizontalRGB;
			connector->interlace_allowed = true;
			if (connector_type == DRM_MODE_CONNECTOR_HDMIB)
				connector->doublescan_allowed = true;
			else
				connector->doublescan_allowed = false;
			break;
		case DRM_MODE_CONNECTOR_DisplayPort:
			amdgpu_dig_connector = kzalloc(sizeof(struct amdgpu_connector_atom_dig), GFP_KERNEL);
			if (!amdgpu_dig_connector)
				goto failed;
			amdgpu_connector->con_priv = amdgpu_dig_connector;
			drm_connector_init(dev, &amdgpu_connector->base, &amdgpu_connector_dp_funcs, connector_type);
			drm_connector_helper_add(&amdgpu_connector->base, &amdgpu_connector_dp_helper_funcs);
			if (i2c_bus->valid) {
				amdgpu_connector->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
				if (amdgpu_connector->ddc_bus)
					has_aux = true;
				else
					DRM_ERROR("DP: Failed to assign ddc bus! Check dmesg for i2c errors.\n");
			}
			subpixel_order = SubPixelHorizontalRGB;
			drm_object_attach_property(&amdgpu_connector->base.base,
						      adev->mode_info.coherent_mode_property,
						      1);
			drm_object_attach_property(&amdgpu_connector->base.base,
						   adev->mode_info.underscan_property,
						   UNDERSCAN_OFF);
			drm_object_attach_property(&amdgpu_connector->base.base,
						   adev->mode_info.underscan_hborder_property,
						   0);
			drm_object_attach_property(&amdgpu_connector->base.base,
						   adev->mode_info.underscan_vborder_property,
						   0);
			drm_object_attach_property(&amdgpu_connector->base.base,
						   dev->mode_config.scaling_mode_property,
						   DRM_MODE_SCALE_NONE);
			if (amdgpu_audio != 0) {
				drm_object_attach_property(&amdgpu_connector->base.base,
							   adev->mode_info.audio_property,
							   AMDGPU_AUDIO_AUTO);
			}
			drm_object_attach_property(&amdgpu_connector->base.base,
						   adev->mode_info.dither_property,
						   AMDGPU_FMT_DITHER_DISABLE);
			connector->interlace_allowed = true;
			/* in theory with a DP to VGA converter... */
			connector->doublescan_allowed = false;
			break;
		case DRM_MODE_CONNECTOR_eDP:
			amdgpu_dig_connector = kzalloc(sizeof(struct amdgpu_connector_atom_dig), GFP_KERNEL);
			if (!amdgpu_dig_connector)
				goto failed;
			amdgpu_connector->con_priv = amdgpu_dig_connector;
			drm_connector_init(dev, &amdgpu_connector->base, &amdgpu_connector_edp_funcs, connector_type);
			drm_connector_helper_add(&amdgpu_connector->base, &amdgpu_connector_dp_helper_funcs);
			if (i2c_bus->valid) {
				amdgpu_connector->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
				if (amdgpu_connector->ddc_bus)
					has_aux = true;
				else
					DRM_ERROR("DP: Failed to assign ddc bus! Check dmesg for i2c errors.\n");
			}
			drm_object_attach_property(&amdgpu_connector->base.base,
						      dev->mode_config.scaling_mode_property,
						      DRM_MODE_SCALE_FULLSCREEN);
			subpixel_order = SubPixelHorizontalRGB;
			connector->interlace_allowed = false;
			connector->doublescan_allowed = false;
			break;
		case DRM_MODE_CONNECTOR_LVDS:
			amdgpu_dig_connector = kzalloc(sizeof(struct amdgpu_connector_atom_dig), GFP_KERNEL);
			if (!amdgpu_dig_connector)
				goto failed;
			amdgpu_connector->con_priv = amdgpu_dig_connector;
			drm_connector_init(dev, &amdgpu_connector->base, &amdgpu_connector_lvds_funcs, connector_type);
			drm_connector_helper_add(&amdgpu_connector->base, &amdgpu_connector_lvds_helper_funcs);
			if (i2c_bus->valid) {
				amdgpu_connector->ddc_bus = amdgpu_i2c_lookup(adev, i2c_bus);
				if (!amdgpu_connector->ddc_bus)
					DRM_ERROR("LVDS: Failed to assign ddc bus! Check dmesg for i2c errors.\n");
			}
			drm_object_attach_property(&amdgpu_connector->base.base,
						      dev->mode_config.scaling_mode_property,
						      DRM_MODE_SCALE_FULLSCREEN);
			subpixel_order = SubPixelHorizontalRGB;
			connector->interlace_allowed = false;
			connector->doublescan_allowed = false;
			break;
		}
	}

	if (amdgpu_connector->hpd.hpd == AMDGPU_HPD_NONE) {
		if (i2c_bus->valid) {
			connector->polled = DRM_CONNECTOR_POLL_CONNECT |
			                    DRM_CONNECTOR_POLL_DISCONNECT;
		}
	} else
		connector->polled = DRM_CONNECTOR_POLL_HPD;

	connector->display_info.subpixel_order = subpixel_order;
	drm_connector_register(connector);

	if (has_aux)
		amdgpu_atombios_dp_aux_init(amdgpu_connector);

	return;

failed:
	drm_connector_cleanup(connector);
	kfree(connector);
}