drivers/gpu/drm/i915/intel_hdmi.c - kernel/msm-4.9 - Gitiles

 /*
  * Copyright 2006 Dave Airlie <airlied@linux.ie>
  * Copyright © 2006-2009 Intel Corporation
  *
  * 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 (including the next
  * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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:
  *	Eric Anholt <eric@anholt.net>
  *	Jesse Barnes <jesse.barnes@intel.com>
  */

 #include <linux/i2c.h>
 #include <linux/slab.h>
 #include <linux/delay.h>
 #include "drmP.h"
 #include "drm.h"
 #include "drm_crtc.h"
 #include "drm_edid.h"
 #include "intel_drv.h"
 #include "i915_drm.h"
 #include "i915_drv.h"

 struct intel_hdmi {
 	struct intel_encoder base;
 	u32 sdvox_reg;
 	int ddc_bus;
 	bool has_hdmi_sink;
 	bool has_audio;
 	int force_audio;
 	struct drm_property *force_audio_property;
 };

 static struct intel_hdmi *enc_to_intel_hdmi(struct drm_encoder *encoder)
 {
 	return container_of(encoder, struct intel_hdmi, base.base);
 }

 static struct intel_hdmi *intel_attached_hdmi(struct drm_connector *connector)
 {
 	return container_of(intel_attached_encoder(connector),
 			    struct intel_hdmi, base);
 }

 void intel_dip_infoframe_csum(struct dip_infoframe *avi_if)
 {
 	uint8_t *data = (uint8_t *)avi_if;
 	uint8_t sum = 0;
 	unsigned i;

 	avi_if->checksum = 0;
 	avi_if->ecc = 0;

 	for (i = 0; i < sizeof(*avi_if); i++)
 		sum += data[i];

 	avi_if->checksum = 0x100 - sum;
 }

 static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
 {
 	struct dip_infoframe avi_if = {
 		.type = DIP_TYPE_AVI,
 		.ver = DIP_VERSION_AVI,
 		.len = DIP_LEN_AVI,
 	};
 	uint32_t *data = (uint32_t *)&avi_if;
 	struct drm_device *dev = encoder->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 	u32 port;
 	unsigned i;

 	if (!intel_hdmi->has_hdmi_sink)
 		return;

 	/* XXX first guess at handling video port, is this corrent? */
 	if (intel_hdmi->sdvox_reg == SDVOB)
 		port = VIDEO_DIP_PORT_B;
 	else if (intel_hdmi->sdvox_reg == SDVOC)
 		port = VIDEO_DIP_PORT_C;
 	else
 		return;

 	I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | port |
 		   VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC);

 	intel_dip_infoframe_csum(&avi_if);
 	for (i = 0; i < sizeof(avi_if); i += 4) {
 		I915_WRITE(VIDEO_DIP_DATA, *data);
 		data++;
 	}

 	I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | port |
 		   VIDEO_DIP_SELECT_AVI | VIDEO_DIP_FREQ_VSYNC |
 		   VIDEO_DIP_ENABLE_AVI);
 }

 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
 				struct drm_display_mode *mode,
 				struct drm_display_mode *adjusted_mode)
 {
 	struct drm_device *dev = encoder->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct drm_crtc *crtc = encoder->crtc;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 	u32 sdvox;

 	sdvox = SDVO_ENCODING_HDMI | SDVO_BORDER_ENABLE;
 	if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 		sdvox |= SDVO_VSYNC_ACTIVE_HIGH;
 	if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 		sdvox |= SDVO_HSYNC_ACTIVE_HIGH;

 	/* Required on CPT */
 	if (intel_hdmi->has_hdmi_sink && HAS_PCH_CPT(dev))
 		sdvox |= HDMI_MODE_SELECT;

 	if (intel_hdmi->has_audio) {
 		sdvox |= SDVO_AUDIO_ENABLE;
 		sdvox |= SDVO_NULL_PACKETS_DURING_VSYNC;
 	}

 	if (intel_crtc->pipe == 1) {
 		if (HAS_PCH_CPT(dev))
 			sdvox |= PORT_TRANS_B_SEL_CPT;
 		else
 			sdvox |= SDVO_PIPE_B_SELECT;
 	}

 	I915_WRITE(intel_hdmi->sdvox_reg, sdvox);
 	POSTING_READ(intel_hdmi->sdvox_reg);

 	intel_hdmi_set_avi_infoframe(encoder);
 }

 static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
 {
 	struct drm_device *dev = encoder->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
 	u32 temp;

 	temp = I915_READ(intel_hdmi->sdvox_reg);

 	/* HW workaround, need to toggle enable bit off and on for 12bpc, but
 	 * we do this anyway which shows more stable in testing.
 	 */
 	if (HAS_PCH_SPLIT(dev)) {
 		I915_WRITE(intel_hdmi->sdvox_reg, temp & ~SDVO_ENABLE);
 		POSTING_READ(intel_hdmi->sdvox_reg);
 	}

 	if (mode != DRM_MODE_DPMS_ON) {
 		temp &= ~SDVO_ENABLE;
 	} else {
 		temp |= SDVO_ENABLE;
 	}

 	I915_WRITE(intel_hdmi->sdvox_reg, temp);
 	POSTING_READ(intel_hdmi->sdvox_reg);

 	/* HW workaround, need to write this twice for issue that may result
 	 * in first write getting masked.
 	 */
 	if (HAS_PCH_SPLIT(dev)) {
 		I915_WRITE(intel_hdmi->sdvox_reg, temp);
 		POSTING_READ(intel_hdmi->sdvox_reg);
 	}
 }

 static int intel_hdmi_mode_valid(struct drm_connector *connector,
 				 struct drm_display_mode *mode)
 {
 	if (mode->clock > 165000)
 		return MODE_CLOCK_HIGH;
 	if (mode->clock < 20000)
 		return MODE_CLOCK_HIGH;

 	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 		return MODE_NO_DBLESCAN;

 	return MODE_OK;
 }

 static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
 				  struct drm_display_mode *mode,
 				  struct drm_display_mode *adjusted_mode)
 {
 	return true;
 }

 static enum drm_connector_status
 intel_hdmi_detect(struct drm_connector *connector, bool force)
 {
 	struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 	struct drm_i915_private *dev_priv = connector->dev->dev_private;
 	struct edid *edid;
 	enum drm_connector_status status = connector_status_disconnected;

 	intel_hdmi->has_hdmi_sink = false;
 	intel_hdmi->has_audio = false;
 	edid = drm_get_edid(connector,
 			    &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);

 	if (edid) {
 		if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 			status = connector_status_connected;
 			intel_hdmi->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
 			intel_hdmi->has_audio = drm_detect_monitor_audio(edid);
 		}
 		connector->display_info.raw_edid = NULL;
 		kfree(edid);
 	}

 	if (status == connector_status_connected) {
 		if (intel_hdmi->force_audio)
 			intel_hdmi->has_audio = intel_hdmi->force_audio > 0;
 	}

 	return status;
 }

 static int intel_hdmi_get_modes(struct drm_connector *connector)
 {
 	struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 	struct drm_i915_private *dev_priv = connector->dev->dev_private;

 	/* We should parse the EDID data and find out if it's an HDMI sink so
 	 * we can send audio to it.
 	 */

 	return intel_ddc_get_modes(connector,
 				   &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
 }

 static bool
 intel_hdmi_detect_audio(struct drm_connector *connector)
 {
 	struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 	struct drm_i915_private *dev_priv = connector->dev->dev_private;
 	struct edid *edid;
 	bool has_audio = false;

 	edid = drm_get_edid(connector,
 			    &dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
 	if (edid) {
 		if (edid->input & DRM_EDID_INPUT_DIGITAL)
 			has_audio = drm_detect_monitor_audio(edid);

 		connector->display_info.raw_edid = NULL;
 		kfree(edid);
 	}

 	return has_audio;
 }

 static int
 intel_hdmi_set_property(struct drm_connector *connector,
 		      struct drm_property *property,
 		      uint64_t val)
 {
 	struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
 	int ret;

 	ret = drm_connector_property_set_value(connector, property, val);
 	if (ret)
 		return ret;

 	if (property == intel_hdmi->force_audio_property) {
 		int i = val;
 		bool has_audio;

 		if (i == intel_hdmi->force_audio)
 			return 0;

 		intel_hdmi->force_audio = i;

 		if (i == 0)
 			has_audio = intel_hdmi_detect_audio(connector);
 		else
 			has_audio = i > 0;

 		if (has_audio == intel_hdmi->has_audio)
 			return 0;

 		intel_hdmi->has_audio = has_audio;
 		goto done;
 	}

 	return -EINVAL;

 done:
 	if (intel_hdmi->base.base.crtc) {
 		struct drm_crtc *crtc = intel_hdmi->base.base.crtc;
 		drm_crtc_helper_set_mode(crtc, &crtc->mode,
 					 crtc->x, crtc->y,
 					 crtc->fb);
 	}

 	return 0;
 }

 static void intel_hdmi_destroy(struct drm_connector *connector)
 {
 	drm_sysfs_connector_remove(connector);
 	drm_connector_cleanup(connector);
 	kfree(connector);
 }

 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
 	.dpms = intel_hdmi_dpms,
 	.mode_fixup = intel_hdmi_mode_fixup,
 	.prepare = intel_encoder_prepare,
 	.mode_set = intel_hdmi_mode_set,
 	.commit = intel_encoder_commit,
 };

 static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
 	.detect = intel_hdmi_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.set_property = intel_hdmi_set_property,
 	.destroy = intel_hdmi_destroy,
 };

 static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
 	.get_modes = intel_hdmi_get_modes,
 	.mode_valid = intel_hdmi_mode_valid,
 	.best_encoder = intel_best_encoder,
 };

 static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
 	.destroy = intel_encoder_destroy,
 };

 static void
 intel_hdmi_add_properties(struct intel_hdmi *intel_hdmi, struct drm_connector *connector)
 {
 	struct drm_device *dev = connector->dev;

 	intel_hdmi->force_audio_property =
 		drm_property_create(dev, DRM_MODE_PROP_RANGE, "force_audio", 2);
 	if (intel_hdmi->force_audio_property) {
 		intel_hdmi->force_audio_property->values[0] = -1;
 		intel_hdmi->force_audio_property->values[1] = 1;
 		drm_connector_attach_property(connector, intel_hdmi->force_audio_property, 0);
 	}
 }

 void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct drm_connector *connector;
 	struct intel_encoder *intel_encoder;
 	struct intel_connector *intel_connector;
 	struct intel_hdmi *intel_hdmi;

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

 	intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
 	if (!intel_connector) {
 		kfree(intel_hdmi);
 		return;
 	}

 	intel_encoder = &intel_hdmi->base;
 	drm_encoder_init(dev, &intel_encoder->base, &intel_hdmi_enc_funcs,
 			 DRM_MODE_ENCODER_TMDS);

 	connector = &intel_connector->base;
 	drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
 			   DRM_MODE_CONNECTOR_HDMIA);
 	drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);

 	intel_encoder->type = INTEL_OUTPUT_HDMI;

 	connector->polled = DRM_CONNECTOR_POLL_HPD;
 	connector->interlace_allowed = 0;
 	connector->doublescan_allowed = 0;
 	intel_encoder->crtc_mask = (1 << 0) | (1 << 1);

 	/* Set up the DDC bus. */
 	if (sdvox_reg == SDVOB) {
 		intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 		dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 	} else if (sdvox_reg == SDVOC) {
 		intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 		dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 	} else if (sdvox_reg == HDMIB) {
 		intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
 		dev_priv->hotplug_supported_mask |= HDMIB_HOTPLUG_INT_STATUS;
 	} else if (sdvox_reg == HDMIC) {
 		intel_encoder->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
 		dev_priv->hotplug_supported_mask |= HDMIC_HOTPLUG_INT_STATUS;
 	} else if (sdvox_reg == HDMID) {
 		intel_encoder->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
 		intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
 		dev_priv->hotplug_supported_mask |= HDMID_HOTPLUG_INT_STATUS;
 	}

 	intel_hdmi->sdvox_reg = sdvox_reg;

 	drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);

 	intel_hdmi_add_properties(intel_hdmi, connector);

 	intel_connector_attach_encoder(intel_connector, intel_encoder);
 	drm_sysfs_connector_add(connector);

 	/* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
 	 * 0xd.  Failure to do so will result in spurious interrupts being
 	 * generated on the port when a cable is not attached.
 	 */
 	if (IS_G4X(dev) && !IS_GM45(dev)) {
 		u32 temp = I915_READ(PEG_BAND_GAP_DATA);
 		I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
 	}
 }
	/*
	* Copyright 2006 Dave Airlie <airlied@linux.ie>
	* Copyright © 2006-2009 Intel Corporation
	*
	* 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 (including the next
	* paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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:
	* Eric Anholt <eric@anholt.net>
	* Jesse Barnes <jesse.barnes@intel.com>
	*/

	#include <linux/i2c.h>
	#include <linux/slab.h>
	#include <linux/delay.h>
	#include "drmP.h"
	#include "drm.h"
	#include "drm_crtc.h"
	#include "drm_edid.h"
	#include "intel_drv.h"
	#include "i915_drm.h"
	#include "i915_drv.h"

	struct intel_hdmi {
	struct intel_encoder base;
	u32 sdvox_reg;
	int ddc_bus;
	bool has_hdmi_sink;
	bool has_audio;
	int force_audio;
	struct drm_property *force_audio_property;
	};

	static struct intel_hdmi enc_to_intel_hdmi(struct drm_encoder encoder)
	{
	return container_of(encoder, struct intel_hdmi, base.base);
	}

	static struct intel_hdmi intel_attached_hdmi(struct drm_connector connector)
	{
	return container_of(intel_attached_encoder(connector),
	struct intel_hdmi, base);
	}

	void intel_dip_infoframe_csum(struct dip_infoframe *avi_if)
	{
	uint8_t data = (uint8_t )avi_if;
	uint8_t sum = 0;
	unsigned i;

	avi_if->checksum = 0;
	avi_if->ecc = 0;

	for (i = 0; i < sizeof(*avi_if); i++)
	sum += data[i];

	avi_if->checksum = 0x100 - sum;
	}

	static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
	{
	struct dip_infoframe avi_if = {
	.type = DIP_TYPE_AVI,
	.ver = DIP_VERSION_AVI,
	.len = DIP_LEN_AVI,
	};
	uint32_t data = (uint32_t )&avi_if;
	struct drm_device *dev = encoder->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
	u32 port;
	unsigned i;

	if (!intel_hdmi->has_hdmi_sink)
	return;

	/* XXX first guess at handling video port, is this corrent? */
	if (intel_hdmi->sdvox_reg == SDVOB)
	port = VIDEO_DIP_PORT_B;
	else if (intel_hdmi->sdvox_reg == SDVOC)
	port = VIDEO_DIP_PORT_C;
	else
	return;

	I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE \| port \|
	VIDEO_DIP_SELECT_AVI \| VIDEO_DIP_FREQ_VSYNC);

	intel_dip_infoframe_csum(&avi_if);
	for (i = 0; i < sizeof(avi_if); i += 4) {
	I915_WRITE(VIDEO_DIP_DATA, *data);
	data++;
	}

	I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE \| port \|
	VIDEO_DIP_SELECT_AVI \| VIDEO_DIP_FREQ_VSYNC \|
	VIDEO_DIP_ENABLE_AVI);
	}

	static void intel_hdmi_mode_set(struct drm_encoder *encoder,
	struct drm_display_mode *mode,
	struct drm_display_mode *adjusted_mode)
	{
	struct drm_device *dev = encoder->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct drm_crtc *crtc = encoder->crtc;
	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
	u32 sdvox;

	sdvox = SDVO_ENCODING_HDMI \| SDVO_BORDER_ENABLE;
	if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
	sdvox \|= SDVO_VSYNC_ACTIVE_HIGH;
	if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
	sdvox \|= SDVO_HSYNC_ACTIVE_HIGH;

	/* Required on CPT */
	if (intel_hdmi->has_hdmi_sink && HAS_PCH_CPT(dev))
	sdvox \|= HDMI_MODE_SELECT;

	if (intel_hdmi->has_audio) {
	sdvox \|= SDVO_AUDIO_ENABLE;
	sdvox \|= SDVO_NULL_PACKETS_DURING_VSYNC;
	}

	if (intel_crtc->pipe == 1) {
	if (HAS_PCH_CPT(dev))
	sdvox \|= PORT_TRANS_B_SEL_CPT;
	else
	sdvox \|= SDVO_PIPE_B_SELECT;
	}

	I915_WRITE(intel_hdmi->sdvox_reg, sdvox);
	POSTING_READ(intel_hdmi->sdvox_reg);

	intel_hdmi_set_avi_infoframe(encoder);
	}

	static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
	{
	struct drm_device *dev = encoder->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
	u32 temp;

	temp = I915_READ(intel_hdmi->sdvox_reg);

	/* HW workaround, need to toggle enable bit off and on for 12bpc, but
	* we do this anyway which shows more stable in testing.
	*/
	if (HAS_PCH_SPLIT(dev)) {
	I915_WRITE(intel_hdmi->sdvox_reg, temp & ~SDVO_ENABLE);
	POSTING_READ(intel_hdmi->sdvox_reg);
	}

	if (mode != DRM_MODE_DPMS_ON) {
	temp &= ~SDVO_ENABLE;
	} else {
	temp \|= SDVO_ENABLE;
	}

	I915_WRITE(intel_hdmi->sdvox_reg, temp);
	POSTING_READ(intel_hdmi->sdvox_reg);

	/* HW workaround, need to write this twice for issue that may result
	* in first write getting masked.
	*/
	if (HAS_PCH_SPLIT(dev)) {
	I915_WRITE(intel_hdmi->sdvox_reg, temp);
	POSTING_READ(intel_hdmi->sdvox_reg);
	}
	}

	static int intel_hdmi_mode_valid(struct drm_connector *connector,
	struct drm_display_mode *mode)
	{
	if (mode->clock > 165000)
	return MODE_CLOCK_HIGH;
	if (mode->clock < 20000)
	return MODE_CLOCK_HIGH;

	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
	return MODE_NO_DBLESCAN;

	return MODE_OK;
	}

	static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
	struct drm_display_mode *mode,
	struct drm_display_mode *adjusted_mode)
	{
	return true;
	}

	static enum drm_connector_status
	intel_hdmi_detect(struct drm_connector *connector, bool force)
	{
	struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
	struct drm_i915_private *dev_priv = connector->dev->dev_private;
	struct edid *edid;
	enum drm_connector_status status = connector_status_disconnected;

	intel_hdmi->has_hdmi_sink = false;
	intel_hdmi->has_audio = false;
	edid = drm_get_edid(connector,
	&dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);

	if (edid) {
	if (edid->input & DRM_EDID_INPUT_DIGITAL) {
	status = connector_status_connected;
	intel_hdmi->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
	intel_hdmi->has_audio = drm_detect_monitor_audio(edid);
	}
	connector->display_info.raw_edid = NULL;
	kfree(edid);
	}

	if (status == connector_status_connected) {
	if (intel_hdmi->force_audio)
	intel_hdmi->has_audio = intel_hdmi->force_audio > 0;
	}

	return status;
	}

	static int intel_hdmi_get_modes(struct drm_connector *connector)
	{
	struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
	struct drm_i915_private *dev_priv = connector->dev->dev_private;

	/* We should parse the EDID data and find out if it's an HDMI sink so
	* we can send audio to it.
	*/

	return intel_ddc_get_modes(connector,
	&dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
	}

	static bool
	intel_hdmi_detect_audio(struct drm_connector *connector)
	{
	struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
	struct drm_i915_private *dev_priv = connector->dev->dev_private;
	struct edid *edid;
	bool has_audio = false;

	edid = drm_get_edid(connector,
	&dev_priv->gmbus[intel_hdmi->ddc_bus].adapter);
	if (edid) {
	if (edid->input & DRM_EDID_INPUT_DIGITAL)
	has_audio = drm_detect_monitor_audio(edid);

	connector->display_info.raw_edid = NULL;
	kfree(edid);
	}

	return has_audio;
	}

	static int
	intel_hdmi_set_property(struct drm_connector *connector,
	struct drm_property *property,
	uint64_t val)
	{
	struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector);
	int ret;

	ret = drm_connector_property_set_value(connector, property, val);
	if (ret)
	return ret;

	if (property == intel_hdmi->force_audio_property) {
	int i = val;
	bool has_audio;

	if (i == intel_hdmi->force_audio)
	return 0;

	intel_hdmi->force_audio = i;

	if (i == 0)
	has_audio = intel_hdmi_detect_audio(connector);
	else
	has_audio = i > 0;

	if (has_audio == intel_hdmi->has_audio)
	return 0;

	intel_hdmi->has_audio = has_audio;
	goto done;
	}

	return -EINVAL;

	done:
	if (intel_hdmi->base.base.crtc) {
	struct drm_crtc *crtc = intel_hdmi->base.base.crtc;
	drm_crtc_helper_set_mode(crtc, &crtc->mode,
	crtc->x, crtc->y,
	crtc->fb);
	}

	return 0;
	}

	static void intel_hdmi_destroy(struct drm_connector *connector)
	{
	drm_sysfs_connector_remove(connector);
	drm_connector_cleanup(connector);
	kfree(connector);
	}

	static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
	.dpms = intel_hdmi_dpms,
	.mode_fixup = intel_hdmi_mode_fixup,
	.prepare = intel_encoder_prepare,
	.mode_set = intel_hdmi_mode_set,
	.commit = intel_encoder_commit,
	};

	static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
	.dpms = drm_helper_connector_dpms,
	.detect = intel_hdmi_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.set_property = intel_hdmi_set_property,
	.destroy = intel_hdmi_destroy,
	};

	static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
	.get_modes = intel_hdmi_get_modes,
	.mode_valid = intel_hdmi_mode_valid,
	.best_encoder = intel_best_encoder,
	};

	static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
	.destroy = intel_encoder_destroy,
	};

	static void
	intel_hdmi_add_properties(struct intel_hdmi intel_hdmi, struct drm_connector connector)
	{
	struct drm_device *dev = connector->dev;

	intel_hdmi->force_audio_property =
	drm_property_create(dev, DRM_MODE_PROP_RANGE, "force_audio", 2);
	if (intel_hdmi->force_audio_property) {
	intel_hdmi->force_audio_property->values[0] = -1;
	intel_hdmi->force_audio_property->values[1] = 1;
	drm_connector_attach_property(connector, intel_hdmi->force_audio_property, 0);
	}
	}

	void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
	{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct drm_connector *connector;
	struct intel_encoder *intel_encoder;
	struct intel_connector *intel_connector;
	struct intel_hdmi *intel_hdmi;

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

	intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
	if (!intel_connector) {
	kfree(intel_hdmi);
	return;
	}

	intel_encoder = &intel_hdmi->base;
	drm_encoder_init(dev, &intel_encoder->base, &intel_hdmi_enc_funcs,
	DRM_MODE_ENCODER_TMDS);

	connector = &intel_connector->base;
	drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
	DRM_MODE_CONNECTOR_HDMIA);
	drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);

	intel_encoder->type = INTEL_OUTPUT_HDMI;

	connector->polled = DRM_CONNECTOR_POLL_HPD;
	connector->interlace_allowed = 0;
	connector->doublescan_allowed = 0;
	intel_encoder->crtc_mask = (1 << 0) \| (1 << 1);

	/* Set up the DDC bus. */
	if (sdvox_reg == SDVOB) {
	intel_encoder->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
	intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
	dev_priv->hotplug_supported_mask \|= HDMIB_HOTPLUG_INT_STATUS;
	} else if (sdvox_reg == SDVOC) {
	intel_encoder->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
	intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
	dev_priv->hotplug_supported_mask \|= HDMIC_HOTPLUG_INT_STATUS;
	} else if (sdvox_reg == HDMIB) {
	intel_encoder->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
	intel_hdmi->ddc_bus = GMBUS_PORT_DPB;
	dev_priv->hotplug_supported_mask \|= HDMIB_HOTPLUG_INT_STATUS;
	} else if (sdvox_reg == HDMIC) {
	intel_encoder->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
	intel_hdmi->ddc_bus = GMBUS_PORT_DPC;
	dev_priv->hotplug_supported_mask \|= HDMIC_HOTPLUG_INT_STATUS;
	} else if (sdvox_reg == HDMID) {
	intel_encoder->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
	intel_hdmi->ddc_bus = GMBUS_PORT_DPD;
	dev_priv->hotplug_supported_mask \|= HDMID_HOTPLUG_INT_STATUS;
	}

	intel_hdmi->sdvox_reg = sdvox_reg;

	drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);

	intel_hdmi_add_properties(intel_hdmi, connector);

	intel_connector_attach_encoder(intel_connector, intel_encoder);
	drm_sysfs_connector_add(connector);

	/* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
	* 0xd. Failure to do so will result in spurious interrupts being
	* generated on the port when a cable is not attached.
	*/
	if (IS_G4X(dev) && !IS_GM45(dev)) {
	u32 temp = I915_READ(PEG_BAND_GAP_DATA);
	I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) \| 0xd);
	}
	}