drivers/gpu/drm/radeon/radeon_encoders.c - kernel/msm-4.19 - Gitiles

 /*
  * 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_crtc_helper.h>
 #include <drm/radeon_drm.h>
 #include "radeon.h"
 #include "atom.h"

 extern void
 radeon_legacy_backlight_init(struct radeon_encoder *radeon_encoder,
 			     struct drm_connector *drm_connector);
 extern void
 radeon_atom_backlight_init(struct radeon_encoder *radeon_encoder,
 			   struct drm_connector *drm_connector);


 static uint32_t radeon_encoder_clones(struct drm_encoder *encoder)
 {
 	struct drm_device *dev = encoder->dev;
 	struct radeon_device *rdev = dev->dev_private;
 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 	struct drm_encoder *clone_encoder;
 	uint32_t index_mask = 0;
 	int count;

 	/* DIG routing gets problematic */
 	if (rdev->family >= CHIP_R600)
 		return index_mask;
 	/* LVDS/TV are too wacky */
 	if (radeon_encoder->devices & ATOM_DEVICE_LCD_SUPPORT)
 		return index_mask;
 	/* DVO requires 2x ppll clocks depending on tmds chip */
 	if (radeon_encoder->devices & ATOM_DEVICE_DFP2_SUPPORT)
 		return index_mask;

 	count = -1;
 	list_for_each_entry(clone_encoder, &dev->mode_config.encoder_list, head) {
 		struct radeon_encoder *radeon_clone = to_radeon_encoder(clone_encoder);
 		count++;

 		if (clone_encoder == encoder)
 			continue;
 		if (radeon_clone->devices & (ATOM_DEVICE_LCD_SUPPORT))
 			continue;
 		if (radeon_clone->devices & ATOM_DEVICE_DFP2_SUPPORT)
 			continue;
 		else
 			index_mask |= (1 << count);
 	}
 	return index_mask;
 }

 void radeon_setup_encoder_clones(struct drm_device *dev)
 {
 	struct drm_encoder *encoder;

 	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 		encoder->possible_clones = radeon_encoder_clones(encoder);
 	}
 }

 uint32_t
 radeon_get_encoder_enum(struct drm_device *dev, uint32_t supported_device, uint8_t dac)
 {
 	struct radeon_device *rdev = dev->dev_private;
 	uint32_t ret = 0;

 	switch (supported_device) {
 	case ATOM_DEVICE_CRT1_SUPPORT:
 	case ATOM_DEVICE_TV1_SUPPORT:
 	case ATOM_DEVICE_TV2_SUPPORT:
 	case ATOM_DEVICE_CRT2_SUPPORT:
 	case ATOM_DEVICE_CV_SUPPORT:
 		switch (dac) {
 		case 1: /* dac a */
 			if ((rdev->family == CHIP_RS300) ||
 			    (rdev->family == CHIP_RS400) ||
 			    (rdev->family == CHIP_RS480))
 				ret = ENCODER_INTERNAL_DAC2_ENUM_ID1;
 			else if (ASIC_IS_AVIVO(rdev))
 				ret = ENCODER_INTERNAL_KLDSCP_DAC1_ENUM_ID1;
 			else
 				ret = ENCODER_INTERNAL_DAC1_ENUM_ID1;
 			break;
 		case 2: /* dac b */
 			if (ASIC_IS_AVIVO(rdev))
 				ret = ENCODER_INTERNAL_KLDSCP_DAC2_ENUM_ID1;
 			else {
 				/*if (rdev->family == CHIP_R200)
 				  ret = ENCODER_INTERNAL_DVO1_ENUM_ID1;
 				  else*/
 				ret = ENCODER_INTERNAL_DAC2_ENUM_ID1;
 			}
 			break;
 		case 3: /* external dac */
 			if (ASIC_IS_AVIVO(rdev))
 				ret = ENCODER_INTERNAL_KLDSCP_DVO1_ENUM_ID1;
 			else
 				ret = ENCODER_INTERNAL_DVO1_ENUM_ID1;
 			break;
 		}
 		break;
 	case ATOM_DEVICE_LCD1_SUPPORT:
 		if (ASIC_IS_AVIVO(rdev))
 			ret = ENCODER_INTERNAL_LVTM1_ENUM_ID1;
 		else
 			ret = ENCODER_INTERNAL_LVDS_ENUM_ID1;
 		break;
 	case ATOM_DEVICE_DFP1_SUPPORT:
 		if ((rdev->family == CHIP_RS300) ||
 		    (rdev->family == CHIP_RS400) ||
 		    (rdev->family == CHIP_RS480))
 			ret = ENCODER_INTERNAL_DVO1_ENUM_ID1;
 		else if (ASIC_IS_AVIVO(rdev))
 			ret = ENCODER_INTERNAL_KLDSCP_TMDS1_ENUM_ID1;
 		else
 			ret = ENCODER_INTERNAL_TMDS1_ENUM_ID1;
 		break;
 	case ATOM_DEVICE_LCD2_SUPPORT:
 	case ATOM_DEVICE_DFP2_SUPPORT:
 		if ((rdev->family == CHIP_RS600) ||
 		    (rdev->family == CHIP_RS690) ||
 		    (rdev->family == CHIP_RS740))
 			ret = ENCODER_INTERNAL_DDI_ENUM_ID1;
 		else if (ASIC_IS_AVIVO(rdev))
 			ret = ENCODER_INTERNAL_KLDSCP_DVO1_ENUM_ID1;
 		else
 			ret = ENCODER_INTERNAL_DVO1_ENUM_ID1;
 		break;
 	case ATOM_DEVICE_DFP3_SUPPORT:
 		ret = ENCODER_INTERNAL_LVTM1_ENUM_ID1;
 		break;
 	}

 	return ret;
 }

 static void radeon_encoder_add_backlight(struct radeon_encoder *radeon_encoder,
 					 struct drm_connector *connector)
 {
 	struct drm_device *dev = radeon_encoder->base.dev;
 	struct radeon_device *rdev = dev->dev_private;
 	bool use_bl = false;

 	if (!(radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)))
 		return;

 	if (radeon_backlight == 0) {
 		return;
 	} else if (radeon_backlight == 1) {
 		use_bl = true;
 	} else if (radeon_backlight == -1) {
 		/* Quirks */
 		/* Amilo Xi 2550 only works with acpi bl */
 		if ((rdev->pdev->device == 0x9583) &&
 		    (rdev->pdev->subsystem_vendor == 0x1734) &&
 		    (rdev->pdev->subsystem_device == 0x1107))
 			use_bl = false;
 		else
 			use_bl = true;
 	}

 	if (use_bl) {
 		if (rdev->is_atom_bios)
 			radeon_atom_backlight_init(radeon_encoder, connector);
 		else
 			radeon_legacy_backlight_init(radeon_encoder, connector);
 		rdev->mode_info.bl_encoder = radeon_encoder;
 	}
 }

 void
 radeon_link_encoder_connector(struct drm_device *dev)
 {
 	struct drm_connector *connector;
 	struct radeon_connector *radeon_connector;
 	struct drm_encoder *encoder;
 	struct radeon_encoder *radeon_encoder;

 	/* walk the list and link encoders to connectors */
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		radeon_connector = to_radeon_connector(connector);
 		list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 			radeon_encoder = to_radeon_encoder(encoder);
 			if (radeon_encoder->devices & radeon_connector->devices) {
 				drm_mode_connector_attach_encoder(connector, encoder);
 				if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT))
 					radeon_encoder_add_backlight(radeon_encoder, connector);
 			}
 		}
 	}
 }

 void radeon_encoder_set_active_device(struct drm_encoder *encoder)
 {
 	struct drm_device *dev = encoder->dev;
 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 	struct drm_connector *connector;

 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		if (connector->encoder == encoder) {
 			struct radeon_connector *radeon_connector = to_radeon_connector(connector);
 			radeon_encoder->active_device = radeon_encoder->devices & radeon_connector->devices;
 			DRM_DEBUG_KMS("setting active device to %08x from %08x %08x for encoder %d\n",
 				  radeon_encoder->active_device, radeon_encoder->devices,
 				  radeon_connector->devices, encoder->encoder_type);
 		}
 	}
 }

 struct drm_connector *
 radeon_get_connector_for_encoder(struct drm_encoder *encoder)
 {
 	struct drm_device *dev = encoder->dev;
 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 	struct drm_connector *connector;
 	struct radeon_connector *radeon_connector;

 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		radeon_connector = to_radeon_connector(connector);
 		if (radeon_encoder->active_device & radeon_connector->devices)
 			return connector;
 	}
 	return NULL;
 }

 struct drm_connector *
 radeon_get_connector_for_encoder_init(struct drm_encoder *encoder)
 {
 	struct drm_device *dev = encoder->dev;
 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 	struct drm_connector *connector;
 	struct radeon_connector *radeon_connector;

 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		radeon_connector = to_radeon_connector(connector);
 		if (radeon_encoder->devices & radeon_connector->devices)
 			return connector;
 	}
 	return NULL;
 }

 struct drm_encoder *radeon_get_external_encoder(struct drm_encoder *encoder)
 {
 	struct drm_device *dev = encoder->dev;
 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 	struct drm_encoder *other_encoder;
 	struct radeon_encoder *other_radeon_encoder;

 	if (radeon_encoder->is_ext_encoder)
 		return NULL;

 	list_for_each_entry(other_encoder, &dev->mode_config.encoder_list, head) {
 		if (other_encoder == encoder)
 			continue;
 		other_radeon_encoder = to_radeon_encoder(other_encoder);
 		if (other_radeon_encoder->is_ext_encoder &&
 		    (radeon_encoder->devices & other_radeon_encoder->devices))
 			return other_encoder;
 	}
 	return NULL;
 }

 u16 radeon_encoder_get_dp_bridge_encoder_id(struct drm_encoder *encoder)
 {
 	struct drm_encoder *other_encoder = radeon_get_external_encoder(encoder);

 	if (other_encoder) {
 		struct radeon_encoder *radeon_encoder = to_radeon_encoder(other_encoder);

 		switch (radeon_encoder->encoder_id) {
 		case ENCODER_OBJECT_ID_TRAVIS:
 		case ENCODER_OBJECT_ID_NUTMEG:
 			return radeon_encoder->encoder_id;
 		default:
 			return ENCODER_OBJECT_ID_NONE;
 		}
 	}
 	return ENCODER_OBJECT_ID_NONE;
 }

 void radeon_panel_mode_fixup(struct drm_encoder *encoder,
 			     struct drm_display_mode *adjusted_mode)
 {
 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 	struct drm_device *dev = encoder->dev;
 	struct radeon_device *rdev = dev->dev_private;
 	struct drm_display_mode *native_mode = &radeon_encoder->native_mode;
 	unsigned hblank = native_mode->htotal - native_mode->hdisplay;
 	unsigned vblank = native_mode->vtotal - native_mode->vdisplay;
 	unsigned hover = native_mode->hsync_start - native_mode->hdisplay;
 	unsigned vover = native_mode->vsync_start - native_mode->vdisplay;
 	unsigned hsync_width = native_mode->hsync_end - native_mode->hsync_start;
 	unsigned vsync_width = native_mode->vsync_end - native_mode->vsync_start;

 	adjusted_mode->clock = native_mode->clock;
 	adjusted_mode->flags = native_mode->flags;

 	if (ASIC_IS_AVIVO(rdev)) {
 		adjusted_mode->hdisplay = native_mode->hdisplay;
 		adjusted_mode->vdisplay = native_mode->vdisplay;
 	}

 	adjusted_mode->htotal = native_mode->hdisplay + hblank;
 	adjusted_mode->hsync_start = native_mode->hdisplay + hover;
 	adjusted_mode->hsync_end = adjusted_mode->hsync_start + hsync_width;

 	adjusted_mode->vtotal = native_mode->vdisplay + vblank;
 	adjusted_mode->vsync_start = native_mode->vdisplay + vover;
 	adjusted_mode->vsync_end = adjusted_mode->vsync_start + vsync_width;

 	drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);

 	if (ASIC_IS_AVIVO(rdev)) {
 		adjusted_mode->crtc_hdisplay = native_mode->hdisplay;
 		adjusted_mode->crtc_vdisplay = native_mode->vdisplay;
 	}

 	adjusted_mode->crtc_htotal = adjusted_mode->crtc_hdisplay + hblank;
 	adjusted_mode->crtc_hsync_start = adjusted_mode->crtc_hdisplay + hover;
 	adjusted_mode->crtc_hsync_end = adjusted_mode->crtc_hsync_start + hsync_width;

 	adjusted_mode->crtc_vtotal = adjusted_mode->crtc_vdisplay + vblank;
 	adjusted_mode->crtc_vsync_start = adjusted_mode->crtc_vdisplay + vover;
 	adjusted_mode->crtc_vsync_end = adjusted_mode->crtc_vsync_start + vsync_width;

 }

 bool radeon_dig_monitor_is_duallink(struct drm_encoder *encoder,
 				    u32 pixel_clock)
 {
 	struct drm_device *dev = encoder->dev;
 	struct radeon_device *rdev = dev->dev_private;
 	struct drm_connector *connector;
 	struct radeon_connector *radeon_connector;
 	struct radeon_connector_atom_dig *dig_connector;

 	connector = radeon_get_connector_for_encoder(encoder);
 	/* if we don't have an active device yet, just use one of
 	 * the connectors tied to the encoder.
 	 */
 	if (!connector)
 		connector = radeon_get_connector_for_encoder_init(encoder);
 	radeon_connector = to_radeon_connector(connector);

 	switch (connector->connector_type) {
 	case DRM_MODE_CONNECTOR_DVII:
 	case DRM_MODE_CONNECTOR_HDMIB:
 		if (radeon_connector->use_digital) {
 			/* HDMI 1.3 supports up to 340 Mhz over single link */
 			if (ASIC_IS_DCE6(rdev) && drm_detect_hdmi_monitor(radeon_connector_edid(connector))) {
 				if (pixel_clock > 340000)
 					return true;
 				else
 					return false;
 			} else {
 				if (pixel_clock > 165000)
 					return true;
 				else
 					return false;
 			}
 		} else
 			return false;
 	case DRM_MODE_CONNECTOR_DVID:
 	case DRM_MODE_CONNECTOR_HDMIA:
 	case DRM_MODE_CONNECTOR_DisplayPort:
 		dig_connector = radeon_connector->con_priv;
 		if ((dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) ||
 		    (dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP))
 			return false;
 		else {
 			/* HDMI 1.3 supports up to 340 Mhz over single link */
 			if (ASIC_IS_DCE6(rdev) && drm_detect_hdmi_monitor(radeon_connector_edid(connector))) {
 				if (pixel_clock > 340000)
 					return true;
 				else
 					return false;
 			} else {
 				if (pixel_clock > 165000)
 					return true;
 				else
 					return false;
 			}
 		}
 	default:
 		return false;
 	}
 }
	/*
	* 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_crtc_helper.h>
	#include <drm/radeon_drm.h>
	#include "radeon.h"
	#include "atom.h"

	extern void
	radeon_legacy_backlight_init(struct radeon_encoder *radeon_encoder,
	struct drm_connector *drm_connector);
	extern void
	radeon_atom_backlight_init(struct radeon_encoder *radeon_encoder,
	struct drm_connector *drm_connector);


	static uint32_t radeon_encoder_clones(struct drm_encoder *encoder)
	{
	struct drm_device *dev = encoder->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	struct drm_encoder *clone_encoder;
	uint32_t index_mask = 0;
	int count;

	/* DIG routing gets problematic */
	if (rdev->family >= CHIP_R600)
	return index_mask;
	/* LVDS/TV are too wacky */
	if (radeon_encoder->devices & ATOM_DEVICE_LCD_SUPPORT)
	return index_mask;
	/* DVO requires 2x ppll clocks depending on tmds chip */
	if (radeon_encoder->devices & ATOM_DEVICE_DFP2_SUPPORT)
	return index_mask;

	count = -1;
	list_for_each_entry(clone_encoder, &dev->mode_config.encoder_list, head) {
	struct radeon_encoder *radeon_clone = to_radeon_encoder(clone_encoder);
	count++;

	if (clone_encoder == encoder)
	continue;
	if (radeon_clone->devices & (ATOM_DEVICE_LCD_SUPPORT))
	continue;
	if (radeon_clone->devices & ATOM_DEVICE_DFP2_SUPPORT)
	continue;
	else
	index_mask \|= (1 << count);
	}
	return index_mask;
	}

	void radeon_setup_encoder_clones(struct drm_device *dev)
	{
	struct drm_encoder *encoder;

	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
	encoder->possible_clones = radeon_encoder_clones(encoder);
	}
	}

	uint32_t
	radeon_get_encoder_enum(struct drm_device *dev, uint32_t supported_device, uint8_t dac)
	{
	struct radeon_device *rdev = dev->dev_private;
	uint32_t ret = 0;

	switch (supported_device) {
	case ATOM_DEVICE_CRT1_SUPPORT:
	case ATOM_DEVICE_TV1_SUPPORT:
	case ATOM_DEVICE_TV2_SUPPORT:
	case ATOM_DEVICE_CRT2_SUPPORT:
	case ATOM_DEVICE_CV_SUPPORT:
	switch (dac) {
	case 1: /* dac a */
	if ((rdev->family == CHIP_RS300) \|\|
	(rdev->family == CHIP_RS400) \|\|
	(rdev->family == CHIP_RS480))
	ret = ENCODER_INTERNAL_DAC2_ENUM_ID1;
	else if (ASIC_IS_AVIVO(rdev))
	ret = ENCODER_INTERNAL_KLDSCP_DAC1_ENUM_ID1;
	else
	ret = ENCODER_INTERNAL_DAC1_ENUM_ID1;
	break;
	case 2: /* dac b */
	if (ASIC_IS_AVIVO(rdev))
	ret = ENCODER_INTERNAL_KLDSCP_DAC2_ENUM_ID1;
	else {
	/*if (rdev->family == CHIP_R200)
	ret = ENCODER_INTERNAL_DVO1_ENUM_ID1;
	else*/
	ret = ENCODER_INTERNAL_DAC2_ENUM_ID1;
	}
	break;
	case 3: /* external dac */
	if (ASIC_IS_AVIVO(rdev))
	ret = ENCODER_INTERNAL_KLDSCP_DVO1_ENUM_ID1;
	else
	ret = ENCODER_INTERNAL_DVO1_ENUM_ID1;
	break;
	}
	break;
	case ATOM_DEVICE_LCD1_SUPPORT:
	if (ASIC_IS_AVIVO(rdev))
	ret = ENCODER_INTERNAL_LVTM1_ENUM_ID1;
	else
	ret = ENCODER_INTERNAL_LVDS_ENUM_ID1;
	break;
	case ATOM_DEVICE_DFP1_SUPPORT:
	if ((rdev->family == CHIP_RS300) \|\|
	(rdev->family == CHIP_RS400) \|\|
	(rdev->family == CHIP_RS480))
	ret = ENCODER_INTERNAL_DVO1_ENUM_ID1;
	else if (ASIC_IS_AVIVO(rdev))
	ret = ENCODER_INTERNAL_KLDSCP_TMDS1_ENUM_ID1;
	else
	ret = ENCODER_INTERNAL_TMDS1_ENUM_ID1;
	break;
	case ATOM_DEVICE_LCD2_SUPPORT:
	case ATOM_DEVICE_DFP2_SUPPORT:
	if ((rdev->family == CHIP_RS600) \|\|
	(rdev->family == CHIP_RS690) \|\|
	(rdev->family == CHIP_RS740))
	ret = ENCODER_INTERNAL_DDI_ENUM_ID1;
	else if (ASIC_IS_AVIVO(rdev))
	ret = ENCODER_INTERNAL_KLDSCP_DVO1_ENUM_ID1;
	else
	ret = ENCODER_INTERNAL_DVO1_ENUM_ID1;
	break;
	case ATOM_DEVICE_DFP3_SUPPORT:
	ret = ENCODER_INTERNAL_LVTM1_ENUM_ID1;
	break;
	}

	return ret;
	}

	static void radeon_encoder_add_backlight(struct radeon_encoder *radeon_encoder,
	struct drm_connector *connector)
	{
	struct drm_device *dev = radeon_encoder->base.dev;
	struct radeon_device *rdev = dev->dev_private;
	bool use_bl = false;

	if (!(radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)))
	return;

	if (radeon_backlight == 0) {
	return;
	} else if (radeon_backlight == 1) {
	use_bl = true;
	} else if (radeon_backlight == -1) {
	/* Quirks */
	/* Amilo Xi 2550 only works with acpi bl */
	if ((rdev->pdev->device == 0x9583) &&
	(rdev->pdev->subsystem_vendor == 0x1734) &&
	(rdev->pdev->subsystem_device == 0x1107))
	use_bl = false;
	else
	use_bl = true;
	}

	if (use_bl) {
	if (rdev->is_atom_bios)
	radeon_atom_backlight_init(radeon_encoder, connector);
	else
	radeon_legacy_backlight_init(radeon_encoder, connector);
	rdev->mode_info.bl_encoder = radeon_encoder;
	}
	}

	void
	radeon_link_encoder_connector(struct drm_device *dev)
	{
	struct drm_connector *connector;
	struct radeon_connector *radeon_connector;
	struct drm_encoder *encoder;
	struct radeon_encoder *radeon_encoder;

	/* walk the list and link encoders to connectors */
	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
	radeon_connector = to_radeon_connector(connector);
	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
	radeon_encoder = to_radeon_encoder(encoder);
	if (radeon_encoder->devices & radeon_connector->devices) {
	drm_mode_connector_attach_encoder(connector, encoder);
	if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT))
	radeon_encoder_add_backlight(radeon_encoder, connector);
	}
	}
	}
	}

	void radeon_encoder_set_active_device(struct drm_encoder *encoder)
	{
	struct drm_device *dev = encoder->dev;
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	struct drm_connector *connector;

	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
	if (connector->encoder == encoder) {
	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
	radeon_encoder->active_device = radeon_encoder->devices & radeon_connector->devices;
	DRM_DEBUG_KMS("setting active device to %08x from %08x %08x for encoder %d\n",
	radeon_encoder->active_device, radeon_encoder->devices,
	radeon_connector->devices, encoder->encoder_type);
	}
	}
	}

	struct drm_connector *
	radeon_get_connector_for_encoder(struct drm_encoder *encoder)
	{
	struct drm_device *dev = encoder->dev;
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	struct drm_connector *connector;
	struct radeon_connector *radeon_connector;

	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
	radeon_connector = to_radeon_connector(connector);
	if (radeon_encoder->active_device & radeon_connector->devices)
	return connector;
	}
	return NULL;
	}

	struct drm_connector *
	radeon_get_connector_for_encoder_init(struct drm_encoder *encoder)
	{
	struct drm_device *dev = encoder->dev;
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	struct drm_connector *connector;
	struct radeon_connector *radeon_connector;

	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
	radeon_connector = to_radeon_connector(connector);
	if (radeon_encoder->devices & radeon_connector->devices)
	return connector;
	}
	return NULL;
	}

	struct drm_encoder radeon_get_external_encoder(struct drm_encoder encoder)
	{
	struct drm_device *dev = encoder->dev;
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	struct drm_encoder *other_encoder;
	struct radeon_encoder *other_radeon_encoder;

	if (radeon_encoder->is_ext_encoder)
	return NULL;

	list_for_each_entry(other_encoder, &dev->mode_config.encoder_list, head) {
	if (other_encoder == encoder)
	continue;
	other_radeon_encoder = to_radeon_encoder(other_encoder);
	if (other_radeon_encoder->is_ext_encoder &&
	(radeon_encoder->devices & other_radeon_encoder->devices))
	return other_encoder;
	}
	return NULL;
	}

	u16 radeon_encoder_get_dp_bridge_encoder_id(struct drm_encoder *encoder)
	{
	struct drm_encoder *other_encoder = radeon_get_external_encoder(encoder);

	if (other_encoder) {
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(other_encoder);

	switch (radeon_encoder->encoder_id) {
	case ENCODER_OBJECT_ID_TRAVIS:
	case ENCODER_OBJECT_ID_NUTMEG:
	return radeon_encoder->encoder_id;
	default:
	return ENCODER_OBJECT_ID_NONE;
	}
	}
	return ENCODER_OBJECT_ID_NONE;
	}

	void radeon_panel_mode_fixup(struct drm_encoder *encoder,
	struct drm_display_mode *adjusted_mode)
	{
	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
	struct drm_device *dev = encoder->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct drm_display_mode *native_mode = &radeon_encoder->native_mode;
	unsigned hblank = native_mode->htotal - native_mode->hdisplay;
	unsigned vblank = native_mode->vtotal - native_mode->vdisplay;
	unsigned hover = native_mode->hsync_start - native_mode->hdisplay;
	unsigned vover = native_mode->vsync_start - native_mode->vdisplay;
	unsigned hsync_width = native_mode->hsync_end - native_mode->hsync_start;
	unsigned vsync_width = native_mode->vsync_end - native_mode->vsync_start;

	adjusted_mode->clock = native_mode->clock;
	adjusted_mode->flags = native_mode->flags;

	if (ASIC_IS_AVIVO(rdev)) {
	adjusted_mode->hdisplay = native_mode->hdisplay;
	adjusted_mode->vdisplay = native_mode->vdisplay;
	}

	adjusted_mode->htotal = native_mode->hdisplay + hblank;
	adjusted_mode->hsync_start = native_mode->hdisplay + hover;
	adjusted_mode->hsync_end = adjusted_mode->hsync_start + hsync_width;

	adjusted_mode->vtotal = native_mode->vdisplay + vblank;
	adjusted_mode->vsync_start = native_mode->vdisplay + vover;
	adjusted_mode->vsync_end = adjusted_mode->vsync_start + vsync_width;

	drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);

	if (ASIC_IS_AVIVO(rdev)) {
	adjusted_mode->crtc_hdisplay = native_mode->hdisplay;
	adjusted_mode->crtc_vdisplay = native_mode->vdisplay;
	}

	adjusted_mode->crtc_htotal = adjusted_mode->crtc_hdisplay + hblank;
	adjusted_mode->crtc_hsync_start = adjusted_mode->crtc_hdisplay + hover;
	adjusted_mode->crtc_hsync_end = adjusted_mode->crtc_hsync_start + hsync_width;

	adjusted_mode->crtc_vtotal = adjusted_mode->crtc_vdisplay + vblank;
	adjusted_mode->crtc_vsync_start = adjusted_mode->crtc_vdisplay + vover;
	adjusted_mode->crtc_vsync_end = adjusted_mode->crtc_vsync_start + vsync_width;

	}

	bool radeon_dig_monitor_is_duallink(struct drm_encoder *encoder,
	u32 pixel_clock)
	{
	struct drm_device *dev = encoder->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct drm_connector *connector;
	struct radeon_connector *radeon_connector;
	struct radeon_connector_atom_dig *dig_connector;

	connector = radeon_get_connector_for_encoder(encoder);
	/* if we don't have an active device yet, just use one of
	* the connectors tied to the encoder.
	*/
	if (!connector)
	connector = radeon_get_connector_for_encoder_init(encoder);
	radeon_connector = to_radeon_connector(connector);

	switch (connector->connector_type) {
	case DRM_MODE_CONNECTOR_DVII:
	case DRM_MODE_CONNECTOR_HDMIB:
	if (radeon_connector->use_digital) {
	/* HDMI 1.3 supports up to 340 Mhz over single link */
	if (ASIC_IS_DCE6(rdev) && drm_detect_hdmi_monitor(radeon_connector_edid(connector))) {
	if (pixel_clock > 340000)
	return true;
	else
	return false;
	} else {
	if (pixel_clock > 165000)
	return true;
	else
	return false;
	}
	} else
	return false;
	case DRM_MODE_CONNECTOR_DVID:
	case DRM_MODE_CONNECTOR_HDMIA:
	case DRM_MODE_CONNECTOR_DisplayPort:
	dig_connector = radeon_connector->con_priv;
	if ((dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) \|\|
	(dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP))
	return false;
	else {
	/* HDMI 1.3 supports up to 340 Mhz over single link */
	if (ASIC_IS_DCE6(rdev) && drm_detect_hdmi_monitor(radeon_connector_edid(connector))) {
	if (pixel_clock > 340000)
	return true;
	else
	return false;
	} else {
	if (pixel_clock > 165000)
	return true;
	else
	return false;
	}
	}
	default:
	return false;
	}
	}