drivers/gpu/drm/gma500/cdv_intel_hdmi.c - kernel/msm-4.19 - Gitiles

 /*
  * Copyright © 2006-2011 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:
  *	jim liu <jim.liu@intel.com>
  *
  * FIXME:
  *	We should probably make this generic and share it with Medfield
  */

 #include <drm/drmP.h>
 #include <drm/drm.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_edid.h>
 #include "psb_intel_drv.h"
 #include "psb_drv.h"
 #include "psb_intel_reg.h"
 #include "cdv_device.h"
 #include <linux/pm_runtime.h>

 /* hdmi control bits */
 #define HDMI_NULL_PACKETS_DURING_VSYNC	(1 << 9)
 #define HDMI_BORDER_ENABLE		(1 << 7)
 #define HDMI_AUDIO_ENABLE		(1 << 6)
 #define HDMI_VSYNC_ACTIVE_HIGH		(1 << 4)
 #define HDMI_HSYNC_ACTIVE_HIGH		(1 << 3)
 /* hdmi-b control bits */
 #define	HDMIB_PIPE_B_SELECT		(1 << 30)


 struct mid_intel_hdmi_priv {
 	u32 hdmi_reg;
 	u32 save_HDMIB;
 	bool has_hdmi_sink;
 	bool has_hdmi_audio;
 	/* Should set this when detect hotplug */
 	bool hdmi_device_connected;
 	struct mdfld_hdmi_i2c *i2c_bus;
 	struct i2c_adapter *hdmi_i2c_adapter;	/* for control functions */
 	struct drm_device *dev;
 };

 static void cdv_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 psb_intel_encoder *psb_intel_encoder = to_psb_intel_encoder(encoder);
 	struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
 	u32 hdmib;
 	struct drm_crtc *crtc = encoder->crtc;
 	struct psb_intel_crtc *intel_crtc = to_psb_intel_crtc(crtc);

 	hdmib = (2 << 10);

 	if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
 		hdmib |= HDMI_VSYNC_ACTIVE_HIGH;
 	if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
 		hdmib |= HDMI_HSYNC_ACTIVE_HIGH;

 	if (intel_crtc->pipe == 1)
 		hdmib |= HDMIB_PIPE_B_SELECT;

 	if (hdmi_priv->has_hdmi_audio) {
 		hdmib |= HDMI_AUDIO_ENABLE;
 		hdmib |= HDMI_NULL_PACKETS_DURING_VSYNC;
 	}

 	REG_WRITE(hdmi_priv->hdmi_reg, hdmib);
 	REG_READ(hdmi_priv->hdmi_reg);
 }

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

 static void cdv_hdmi_dpms(struct drm_encoder *encoder, int mode)
 {
 	struct drm_device *dev = encoder->dev;
 	struct psb_intel_encoder *psb_intel_encoder =
 						to_psb_intel_encoder(encoder);
 	struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
 	u32 hdmib;

 	hdmib = REG_READ(hdmi_priv->hdmi_reg);

 	if (mode != DRM_MODE_DPMS_ON)
 		REG_WRITE(hdmi_priv->hdmi_reg, hdmib & ~HDMIB_PORT_EN);
 	else
 		REG_WRITE(hdmi_priv->hdmi_reg, hdmib | HDMIB_PORT_EN);
 	REG_READ(hdmi_priv->hdmi_reg);
 }

 static void cdv_hdmi_save(struct drm_connector *connector)
 {
 	struct drm_device *dev = connector->dev;
 	struct psb_intel_encoder *psb_intel_encoder =
 					psb_intel_attached_encoder(connector);
 	struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;

 	hdmi_priv->save_HDMIB = REG_READ(hdmi_priv->hdmi_reg);
 }

 static void cdv_hdmi_restore(struct drm_connector *connector)
 {
 	struct drm_device *dev = connector->dev;
 	struct psb_intel_encoder *psb_intel_encoder =
 					psb_intel_attached_encoder(connector);
 	struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;

 	REG_WRITE(hdmi_priv->hdmi_reg, hdmi_priv->save_HDMIB);
 	REG_READ(hdmi_priv->hdmi_reg);
 }

 static enum drm_connector_status cdv_hdmi_detect(
 				struct drm_connector *connector, bool force)
 {
 	struct psb_intel_encoder *psb_intel_encoder =
 					psb_intel_attached_encoder(connector);
 	struct psb_intel_connector *psb_intel_connector =
 					to_psb_intel_connector(connector);
 	struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
 	struct edid *edid = NULL;
 	enum drm_connector_status status = connector_status_disconnected;

 	edid = drm_get_edid(connector, &psb_intel_encoder->i2c_bus->adapter);

 	hdmi_priv->has_hdmi_sink = false;
 	hdmi_priv->has_hdmi_audio = false;
 	if (edid) {
 		if (edid->input & DRM_EDID_INPUT_DIGITAL) {
 			status = connector_status_connected;
 			hdmi_priv->has_hdmi_sink =
 						drm_detect_hdmi_monitor(edid);
 			hdmi_priv->has_hdmi_audio =
 						drm_detect_monitor_audio(edid);
 		}

 		psb_intel_connector->base.display_info.raw_edid = NULL;
 		kfree(edid);
 	}
 	return status;
 }

 static int cdv_hdmi_set_property(struct drm_connector *connector,
 				       struct drm_property *property,
 				       uint64_t value)
 {
 	struct drm_encoder *encoder = connector->encoder;

 	if (!strcmp(property->name, "scaling mode") && encoder) {
 		struct psb_intel_crtc *crtc = to_psb_intel_crtc(encoder->crtc);
 		bool centre;
 		uint64_t curValue;

 		if (!crtc)
 			return -1;

 		switch (value) {
 		case DRM_MODE_SCALE_FULLSCREEN:
 			break;
 		case DRM_MODE_SCALE_NO_SCALE:
 			break;
 		case DRM_MODE_SCALE_ASPECT:
 			break;
 		default:
 			return -1;
 		}

 		if (drm_connector_property_get_value(connector,
 							property, &curValue))
 			return -1;

 		if (curValue == value)
 			return 0;

 		if (drm_connector_property_set_value(connector,
 							property, value))
 			return -1;

 		centre = (curValue == DRM_MODE_SCALE_NO_SCALE) ||
 			(value == DRM_MODE_SCALE_NO_SCALE);

 		if (crtc->saved_mode.hdisplay != 0 &&
 		    crtc->saved_mode.vdisplay != 0) {
 			if (centre) {
 				if (!drm_crtc_helper_set_mode(encoder->crtc, &crtc->saved_mode,
 					    encoder->crtc->x, encoder->crtc->y, encoder->crtc->fb))
 					return -1;
 			} else {
 				struct drm_encoder_helper_funcs *helpers
 						    = encoder->helper_private;
 				helpers->mode_set(encoder, &crtc->saved_mode,
 					     &crtc->saved_adjusted_mode);
 			}
 		}
 	}
 	return 0;
 }

 /*
  * Return the list of HDMI DDC modes if available.
  */
 static int cdv_hdmi_get_modes(struct drm_connector *connector)
 {
 	struct psb_intel_encoder *psb_intel_encoder =
 					psb_intel_attached_encoder(connector);
 	struct edid *edid = NULL;
 	int ret = 0;

 	edid = drm_get_edid(connector, &psb_intel_encoder->i2c_bus->adapter);
 	if (edid) {
 		drm_mode_connector_update_edid_property(connector, edid);
 		ret = drm_add_edid_modes(connector, edid);
 		kfree(edid);
 	}
 	return ret;
 }

 static int cdv_hdmi_mode_valid(struct drm_connector *connector,
 				 struct drm_display_mode *mode)
 {
 	struct drm_psb_private *dev_priv = connector->dev->dev_private;

 	if (mode->clock > 165000)
 		return MODE_CLOCK_HIGH;
 	if (mode->clock < 20000)
 		return MODE_CLOCK_HIGH;

 	/* just in case */
 	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 		return MODE_NO_DBLESCAN;

 	/* just in case */
 	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 		return MODE_NO_INTERLACE;

 	/* We assume worst case scenario of 32 bpp here, since we don't know */
 	if ((ALIGN(mode->hdisplay * 4, 64) * mode->vdisplay) >
 	    dev_priv->vram_stolen_size)
 		return MODE_MEM;

 	return MODE_OK;
 }

 static void cdv_hdmi_destroy(struct drm_connector *connector)
 {
 	struct psb_intel_encoder *psb_intel_encoder =
 					psb_intel_attached_encoder(connector);

 	if (psb_intel_encoder->i2c_bus)
 		psb_intel_i2c_destroy(psb_intel_encoder->i2c_bus);
 	drm_sysfs_connector_remove(connector);
 	drm_connector_cleanup(connector);
 	kfree(connector);
 }

 static const struct drm_encoder_helper_funcs cdv_hdmi_helper_funcs = {
 	.dpms = cdv_hdmi_dpms,
 	.mode_fixup = cdv_hdmi_mode_fixup,
 	.prepare = psb_intel_encoder_prepare,
 	.mode_set = cdv_hdmi_mode_set,
 	.commit = psb_intel_encoder_commit,
 };

 static const struct drm_connector_helper_funcs
 					cdv_hdmi_connector_helper_funcs = {
 	.get_modes = cdv_hdmi_get_modes,
 	.mode_valid = cdv_hdmi_mode_valid,
 	.best_encoder = psb_intel_best_encoder,
 };

 static const struct drm_connector_funcs cdv_hdmi_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
 	.save = cdv_hdmi_save,
 	.restore = cdv_hdmi_restore,
 	.detect = cdv_hdmi_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.set_property = cdv_hdmi_set_property,
 	.destroy = cdv_hdmi_destroy,
 };

 void cdv_hdmi_init(struct drm_device *dev,
 			struct psb_intel_mode_device *mode_dev, int reg)
 {
 	struct psb_intel_encoder *psb_intel_encoder;
 	struct psb_intel_connector *psb_intel_connector;
 	struct drm_connector *connector;
 	struct drm_encoder *encoder;
 	struct mid_intel_hdmi_priv *hdmi_priv;
 	int ddc_bus;

 	psb_intel_encoder = kzalloc(sizeof(struct psb_intel_encoder),
 				    GFP_KERNEL);

 	if (!psb_intel_encoder)
 		return;

 	psb_intel_connector = kzalloc(sizeof(struct psb_intel_connector),
 				      GFP_KERNEL);

 	if (!psb_intel_connector)
 		goto err_connector;

 	hdmi_priv = kzalloc(sizeof(struct mid_intel_hdmi_priv), GFP_KERNEL);

 	if (!hdmi_priv)
 		goto err_priv;

 	connector = &psb_intel_connector->base;
 	encoder = &psb_intel_encoder->base;
 	drm_connector_init(dev, connector,
 			   &cdv_hdmi_connector_funcs,
 			   DRM_MODE_CONNECTOR_DVID);

 	drm_encoder_init(dev, encoder, &psb_intel_lvds_enc_funcs,
 			 DRM_MODE_ENCODER_TMDS);

 	psb_intel_connector_attach_encoder(psb_intel_connector,
 					   psb_intel_encoder);
 	psb_intel_encoder->type = INTEL_OUTPUT_HDMI;
 	hdmi_priv->hdmi_reg = reg;
 	hdmi_priv->has_hdmi_sink = false;
 	psb_intel_encoder->dev_priv = hdmi_priv;

 	drm_encoder_helper_add(encoder, &cdv_hdmi_helper_funcs);
 	drm_connector_helper_add(connector,
 				 &cdv_hdmi_connector_helper_funcs);
 	connector->display_info.subpixel_order = SubPixelHorizontalRGB;
 	connector->interlace_allowed = false;
 	connector->doublescan_allowed = false;

 	drm_connector_attach_property(connector,
 				      dev->mode_config.scaling_mode_property,
 				      DRM_MODE_SCALE_FULLSCREEN);

 	switch (reg) {
 	case SDVOB:
 		ddc_bus = GPIOE;
 		break;
 	case SDVOC:
 		ddc_bus = GPIOD;
 		break;
 	default:
 		DRM_ERROR("unknown reg 0x%x for HDMI\n", reg);
 		goto failed_ddc;
 		break;
 	}

 	psb_intel_encoder->i2c_bus = psb_intel_i2c_create(dev,
 				ddc_bus, (reg == SDVOB) ? "HDMIB" : "HDMIC");

 	if (!psb_intel_encoder->i2c_bus) {
 		dev_err(dev->dev, "No ddc adapter available!\n");
 		goto failed_ddc;
 	}

 	hdmi_priv->hdmi_i2c_adapter =
 				&(psb_intel_encoder->i2c_bus->adapter);
 	hdmi_priv->dev = dev;
 	drm_sysfs_connector_add(connector);
 	return;

 failed_ddc:
 	drm_encoder_cleanup(encoder);
 	drm_connector_cleanup(connector);
 err_priv:
 	kfree(psb_intel_connector);
 err_connector:
 	kfree(psb_intel_encoder);
 }
	/*
	* Copyright © 2006-2011 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:
	* jim liu <jim.liu@intel.com>
	*
	* FIXME:
	* We should probably make this generic and share it with Medfield
	*/

	#include <drm/drmP.h>
	#include <drm/drm.h>
	#include <drm/drm_crtc.h>
	#include <drm/drm_edid.h>
	#include "psb_intel_drv.h"
	#include "psb_drv.h"
	#include "psb_intel_reg.h"
	#include "cdv_device.h"
	#include <linux/pm_runtime.h>

	/* hdmi control bits */
	#define HDMI_NULL_PACKETS_DURING_VSYNC (1 << 9)
	#define HDMI_BORDER_ENABLE (1 << 7)
	#define HDMI_AUDIO_ENABLE (1 << 6)
	#define HDMI_VSYNC_ACTIVE_HIGH (1 << 4)
	#define HDMI_HSYNC_ACTIVE_HIGH (1 << 3)
	/* hdmi-b control bits */
	#define HDMIB_PIPE_B_SELECT (1 << 30)


	struct mid_intel_hdmi_priv {
	u32 hdmi_reg;
	u32 save_HDMIB;
	bool has_hdmi_sink;
	bool has_hdmi_audio;
	/* Should set this when detect hotplug */
	bool hdmi_device_connected;
	struct mdfld_hdmi_i2c *i2c_bus;
	struct i2c_adapter hdmi_i2c_adapter; / for control functions */
	struct drm_device *dev;
	};

	static void cdv_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 psb_intel_encoder *psb_intel_encoder = to_psb_intel_encoder(encoder);
	struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
	u32 hdmib;
	struct drm_crtc *crtc = encoder->crtc;
	struct psb_intel_crtc *intel_crtc = to_psb_intel_crtc(crtc);

	hdmib = (2 << 10);

	if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
	hdmib \|= HDMI_VSYNC_ACTIVE_HIGH;
	if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
	hdmib \|= HDMI_HSYNC_ACTIVE_HIGH;

	if (intel_crtc->pipe == 1)
	hdmib \|= HDMIB_PIPE_B_SELECT;

	if (hdmi_priv->has_hdmi_audio) {
	hdmib \|= HDMI_AUDIO_ENABLE;
	hdmib \|= HDMI_NULL_PACKETS_DURING_VSYNC;
	}

	REG_WRITE(hdmi_priv->hdmi_reg, hdmib);
	REG_READ(hdmi_priv->hdmi_reg);
	}

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

	static void cdv_hdmi_dpms(struct drm_encoder *encoder, int mode)
	{
	struct drm_device *dev = encoder->dev;
	struct psb_intel_encoder *psb_intel_encoder =
	to_psb_intel_encoder(encoder);
	struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
	u32 hdmib;

	hdmib = REG_READ(hdmi_priv->hdmi_reg);

	if (mode != DRM_MODE_DPMS_ON)
	REG_WRITE(hdmi_priv->hdmi_reg, hdmib & ~HDMIB_PORT_EN);
	else
	REG_WRITE(hdmi_priv->hdmi_reg, hdmib \| HDMIB_PORT_EN);
	REG_READ(hdmi_priv->hdmi_reg);
	}

	static void cdv_hdmi_save(struct drm_connector *connector)
	{
	struct drm_device *dev = connector->dev;
	struct psb_intel_encoder *psb_intel_encoder =
	psb_intel_attached_encoder(connector);
	struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;

	hdmi_priv->save_HDMIB = REG_READ(hdmi_priv->hdmi_reg);
	}

	static void cdv_hdmi_restore(struct drm_connector *connector)
	{
	struct drm_device *dev = connector->dev;
	struct psb_intel_encoder *psb_intel_encoder =
	psb_intel_attached_encoder(connector);
	struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;

	REG_WRITE(hdmi_priv->hdmi_reg, hdmi_priv->save_HDMIB);
	REG_READ(hdmi_priv->hdmi_reg);
	}

	static enum drm_connector_status cdv_hdmi_detect(
	struct drm_connector *connector, bool force)
	{
	struct psb_intel_encoder *psb_intel_encoder =
	psb_intel_attached_encoder(connector);
	struct psb_intel_connector *psb_intel_connector =
	to_psb_intel_connector(connector);
	struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_encoder->dev_priv;
	struct edid *edid = NULL;
	enum drm_connector_status status = connector_status_disconnected;

	edid = drm_get_edid(connector, &psb_intel_encoder->i2c_bus->adapter);

	hdmi_priv->has_hdmi_sink = false;
	hdmi_priv->has_hdmi_audio = false;
	if (edid) {
	if (edid->input & DRM_EDID_INPUT_DIGITAL) {
	status = connector_status_connected;
	hdmi_priv->has_hdmi_sink =
	drm_detect_hdmi_monitor(edid);
	hdmi_priv->has_hdmi_audio =
	drm_detect_monitor_audio(edid);
	}

	psb_intel_connector->base.display_info.raw_edid = NULL;
	kfree(edid);
	}
	return status;
	}

	static int cdv_hdmi_set_property(struct drm_connector *connector,
	struct drm_property *property,
	uint64_t value)
	{
	struct drm_encoder *encoder = connector->encoder;

	if (!strcmp(property->name, "scaling mode") && encoder) {
	struct psb_intel_crtc *crtc = to_psb_intel_crtc(encoder->crtc);
	bool centre;
	uint64_t curValue;

	if (!crtc)
	return -1;

	switch (value) {
	case DRM_MODE_SCALE_FULLSCREEN:
	break;
	case DRM_MODE_SCALE_NO_SCALE:
	break;
	case DRM_MODE_SCALE_ASPECT:
	break;
	default:
	return -1;
	}

	if (drm_connector_property_get_value(connector,
	property, &curValue))
	return -1;

	if (curValue == value)
	return 0;

	if (drm_connector_property_set_value(connector,
	property, value))
	return -1;

	centre = (curValue == DRM_MODE_SCALE_NO_SCALE) \|\|
	(value == DRM_MODE_SCALE_NO_SCALE);

	if (crtc->saved_mode.hdisplay != 0 &&
	crtc->saved_mode.vdisplay != 0) {
	if (centre) {
	if (!drm_crtc_helper_set_mode(encoder->crtc, &crtc->saved_mode,
	encoder->crtc->x, encoder->crtc->y, encoder->crtc->fb))
	return -1;
	} else {
	struct drm_encoder_helper_funcs *helpers
	= encoder->helper_private;
	helpers->mode_set(encoder, &crtc->saved_mode,
	&crtc->saved_adjusted_mode);
	}
	}
	}
	return 0;
	}

	/*
	* Return the list of HDMI DDC modes if available.
	*/
	static int cdv_hdmi_get_modes(struct drm_connector *connector)
	{
	struct psb_intel_encoder *psb_intel_encoder =
	psb_intel_attached_encoder(connector);
	struct edid *edid = NULL;
	int ret = 0;

	edid = drm_get_edid(connector, &psb_intel_encoder->i2c_bus->adapter);
	if (edid) {
	drm_mode_connector_update_edid_property(connector, edid);
	ret = drm_add_edid_modes(connector, edid);
	kfree(edid);
	}
	return ret;
	}

	static int cdv_hdmi_mode_valid(struct drm_connector *connector,
	struct drm_display_mode *mode)
	{
	struct drm_psb_private *dev_priv = connector->dev->dev_private;

	if (mode->clock > 165000)
	return MODE_CLOCK_HIGH;
	if (mode->clock < 20000)
	return MODE_CLOCK_HIGH;

	/* just in case */
	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
	return MODE_NO_DBLESCAN;

	/* just in case */
	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
	return MODE_NO_INTERLACE;

	/* We assume worst case scenario of 32 bpp here, since we don't know */
	if ((ALIGN(mode->hdisplay * 4, 64) * mode->vdisplay) >
	dev_priv->vram_stolen_size)
	return MODE_MEM;

	return MODE_OK;
	}

	static void cdv_hdmi_destroy(struct drm_connector *connector)
	{
	struct psb_intel_encoder *psb_intel_encoder =
	psb_intel_attached_encoder(connector);

	if (psb_intel_encoder->i2c_bus)
	psb_intel_i2c_destroy(psb_intel_encoder->i2c_bus);
	drm_sysfs_connector_remove(connector);
	drm_connector_cleanup(connector);
	kfree(connector);
	}

	static const struct drm_encoder_helper_funcs cdv_hdmi_helper_funcs = {
	.dpms = cdv_hdmi_dpms,
	.mode_fixup = cdv_hdmi_mode_fixup,
	.prepare = psb_intel_encoder_prepare,
	.mode_set = cdv_hdmi_mode_set,
	.commit = psb_intel_encoder_commit,
	};

	static const struct drm_connector_helper_funcs
	cdv_hdmi_connector_helper_funcs = {
	.get_modes = cdv_hdmi_get_modes,
	.mode_valid = cdv_hdmi_mode_valid,
	.best_encoder = psb_intel_best_encoder,
	};

	static const struct drm_connector_funcs cdv_hdmi_connector_funcs = {
	.dpms = drm_helper_connector_dpms,
	.save = cdv_hdmi_save,
	.restore = cdv_hdmi_restore,
	.detect = cdv_hdmi_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.set_property = cdv_hdmi_set_property,
	.destroy = cdv_hdmi_destroy,
	};

	void cdv_hdmi_init(struct drm_device *dev,
	struct psb_intel_mode_device *mode_dev, int reg)
	{
	struct psb_intel_encoder *psb_intel_encoder;
	struct psb_intel_connector *psb_intel_connector;
	struct drm_connector *connector;
	struct drm_encoder *encoder;
	struct mid_intel_hdmi_priv *hdmi_priv;
	int ddc_bus;

	psb_intel_encoder = kzalloc(sizeof(struct psb_intel_encoder),
	GFP_KERNEL);

	if (!psb_intel_encoder)
	return;

	psb_intel_connector = kzalloc(sizeof(struct psb_intel_connector),
	GFP_KERNEL);

	if (!psb_intel_connector)
	goto err_connector;

	hdmi_priv = kzalloc(sizeof(struct mid_intel_hdmi_priv), GFP_KERNEL);

	if (!hdmi_priv)
	goto err_priv;

	connector = &psb_intel_connector->base;
	encoder = &psb_intel_encoder->base;
	drm_connector_init(dev, connector,
	&cdv_hdmi_connector_funcs,
	DRM_MODE_CONNECTOR_DVID);

	drm_encoder_init(dev, encoder, &psb_intel_lvds_enc_funcs,
	DRM_MODE_ENCODER_TMDS);

	psb_intel_connector_attach_encoder(psb_intel_connector,
	psb_intel_encoder);
	psb_intel_encoder->type = INTEL_OUTPUT_HDMI;
	hdmi_priv->hdmi_reg = reg;
	hdmi_priv->has_hdmi_sink = false;
	psb_intel_encoder->dev_priv = hdmi_priv;

	drm_encoder_helper_add(encoder, &cdv_hdmi_helper_funcs);
	drm_connector_helper_add(connector,
	&cdv_hdmi_connector_helper_funcs);
	connector->display_info.subpixel_order = SubPixelHorizontalRGB;
	connector->interlace_allowed = false;
	connector->doublescan_allowed = false;

	drm_connector_attach_property(connector,
	dev->mode_config.scaling_mode_property,
	DRM_MODE_SCALE_FULLSCREEN);

	switch (reg) {
	case SDVOB:
	ddc_bus = GPIOE;
	break;
	case SDVOC:
	ddc_bus = GPIOD;
	break;
	default:
	DRM_ERROR("unknown reg 0x%x for HDMI\n", reg);
	goto failed_ddc;
	break;
	}

	psb_intel_encoder->i2c_bus = psb_intel_i2c_create(dev,
	ddc_bus, (reg == SDVOB) ? "HDMIB" : "HDMIC");

	if (!psb_intel_encoder->i2c_bus) {
	dev_err(dev->dev, "No ddc adapter available!\n");
	goto failed_ddc;
	}

	hdmi_priv->hdmi_i2c_adapter =
	&(psb_intel_encoder->i2c_bus->adapter);
	hdmi_priv->dev = dev;
	drm_sysfs_connector_add(connector);
	return;

	failed_ddc:
	drm_encoder_cleanup(encoder);
	drm_connector_cleanup(connector);
	err_priv:
	kfree(psb_intel_connector);
	err_connector:
	kfree(psb_intel_encoder);
	}