[deliverable/linux.git] / drivers / gpu / drm / i915 / intel_hdmi.c

/*
 * 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/delay.h>
#include "drmP.h"
#include "drm.h"
#include "drm_crtc.h"
#include "intel_drv.h"
#include "i915_drm.h"
#include "i915_drv.h"

struct intel_hdmi_priv {
	u32 sdvox_reg;
	u32 save_SDVOX;
	bool has_hdmi_sink;
};

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_output *intel_output = enc_to_intel_output(encoder);
	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	u32 sdvox;

	sdvox = SDVO_ENCODING_HDMI |
		SDVO_BORDER_ENABLE |
		SDVO_VSYNC_ACTIVE_HIGH |
		SDVO_HSYNC_ACTIVE_HIGH |
		SDVO_NULL_PACKETS_DURING_VSYNC;

	if (hdmi_priv->has_hdmi_sink)
		sdvox |= SDVO_AUDIO_ENABLE;

	if (intel_crtc->pipe == 1)
		sdvox |= SDVO_PIPE_B_SELECT;

	I915_WRITE(hdmi_priv->sdvox_reg, sdvox);
	POSTING_READ(hdmi_priv->sdvox_reg);
}

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_output *intel_output = enc_to_intel_output(encoder);
	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	u32 temp;

	if (mode != DRM_MODE_DPMS_ON) {
		temp = I915_READ(hdmi_priv->sdvox_reg);
		I915_WRITE(hdmi_priv->sdvox_reg, temp & ~SDVO_ENABLE);
	} else {
		temp = I915_READ(hdmi_priv->sdvox_reg);
		I915_WRITE(hdmi_priv->sdvox_reg, temp | SDVO_ENABLE);
	}
	POSTING_READ(hdmi_priv->sdvox_reg);
}

static void intel_hdmi_save(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_output *intel_output = to_intel_output(connector);
	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;

	hdmi_priv->save_SDVOX = I915_READ(hdmi_priv->sdvox_reg);
}

static void intel_hdmi_restore(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_output *intel_output = to_intel_output(connector);
	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;

	I915_WRITE(hdmi_priv->sdvox_reg, hdmi_priv->save_SDVOX);
	POSTING_READ(hdmi_priv->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 void
intel_hdmi_sink_detect(struct drm_connector *connector)
{
	struct intel_output *intel_output = to_intel_output(connector);
	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	struct edid *edid = NULL;

	edid = drm_get_edid(&intel_output->base,
			    &intel_output->ddc_bus->adapter);
	if (edid != NULL) {
		hdmi_priv->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
		kfree(edid);
		intel_output->base.display_info.raw_edid = NULL;
	}
}

static enum drm_connector_status
igdng_hdmi_detect(struct drm_connector *connector)
{
	struct intel_output *intel_output = to_intel_output(connector);
	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;

	/* FIXME hotplug detect */

	hdmi_priv->has_hdmi_sink = false;
	intel_hdmi_sink_detect(connector);
	if (hdmi_priv->has_hdmi_sink)
		return connector_status_connected;
	else
		return connector_status_disconnected;
}

static enum drm_connector_status
intel_hdmi_detect(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_output *intel_output = to_intel_output(connector);
	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	u32 temp, bit;

	if (IS_IGDNG(dev))
		return igdng_hdmi_detect(connector);

	temp = I915_READ(PORT_HOTPLUG_EN);

	switch (hdmi_priv->sdvox_reg) {
	case SDVOB:
		temp |= HDMIB_HOTPLUG_INT_EN;
		break;
	case SDVOC:
		temp |= HDMIC_HOTPLUG_INT_EN;
		break;
	default:
		return connector_status_unknown;
	}

	I915_WRITE(PORT_HOTPLUG_EN, temp);

	POSTING_READ(PORT_HOTPLUG_EN);

	switch (hdmi_priv->sdvox_reg) {
	case SDVOB:
		bit = HDMIB_HOTPLUG_INT_STATUS;
		break;
	case SDVOC:
		bit = HDMIC_HOTPLUG_INT_STATUS;
		break;
	default:
		return connector_status_unknown;
	}

	if ((I915_READ(PORT_HOTPLUG_STAT) & bit) != 0) {
		intel_hdmi_sink_detect(connector);
		return connector_status_connected;
	} else
		return connector_status_disconnected;
}

static int intel_hdmi_get_modes(struct drm_connector *connector)
{
	struct intel_output *intel_output = to_intel_output(connector);

	/* 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(intel_output);
}

static void intel_hdmi_destroy(struct drm_connector *connector)
{
	struct intel_output *intel_output = to_intel_output(connector);

	if (intel_output->i2c_bus)
		intel_i2c_destroy(intel_output->i2c_bus);
	drm_sysfs_connector_remove(connector);
	drm_connector_cleanup(connector);
	kfree(intel_output);
}

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,
	.save = intel_hdmi_save,
	.restore = intel_hdmi_restore,
	.detect = intel_hdmi_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.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 void intel_hdmi_enc_destroy(struct drm_encoder *encoder)
{
	drm_encoder_cleanup(encoder);
}

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


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_output *intel_output;
	struct intel_hdmi_priv *hdmi_priv;

	intel_output = kcalloc(sizeof(struct intel_output) +
			       sizeof(struct intel_hdmi_priv), 1, GFP_KERNEL);
	if (!intel_output)
		return;
	hdmi_priv = (struct intel_hdmi_priv *)(intel_output + 1);

	connector = &intel_output->base;
	drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
			   DRM_MODE_CONNECTOR_DVID);
	drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);

	intel_output->type = INTEL_OUTPUT_HDMI;

	connector->interlace_allowed = 0;
	connector->doublescan_allowed = 0;

	/* Set up the DDC bus. */
	if (sdvox_reg == SDVOB)
		intel_output->ddc_bus = intel_i2c_create(dev, GPIOE, "HDMIB");
	else if (sdvox_reg == SDVOC)
		intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "HDMIC");
	else if (sdvox_reg == HDMIB)
		intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOE,
								"HDMIB");
	else if (sdvox_reg == HDMIC)
		intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOD,
								"HDMIC");
	else if (sdvox_reg == HDMID)
		intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOF,
								"HDMID");

	if (!intel_output->ddc_bus)
		goto err_connector;

	hdmi_priv->sdvox_reg = sdvox_reg;
	intel_output->dev_priv = hdmi_priv;

	drm_encoder_init(dev, &intel_output->enc, &intel_hdmi_enc_funcs,
			 DRM_MODE_ENCODER_TMDS);
	drm_encoder_helper_add(&intel_output->enc, &intel_hdmi_helper_funcs);

	drm_mode_connector_attach_encoder(&intel_output->base,
					  &intel_output->enc);
	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);
	}

	return;

err_connector:
	drm_connector_cleanup(connector);
	kfree(intel_output);

	return;
}
Commit	Line	Data
7d57382e EA	1	/*
	2	* Copyright 2006 Dave Airlie <airlied@linux.ie>
	3	* Copyright © 2006-2009 Intel Corporation
	4	*
	5	* Permission is hereby granted, free of charge, to any person obtaining a
	6	* copy of this software and associated documentation files (the "Software"),
	7	* to deal in the Software without restriction, including without limitation
	8	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	9	* and/or sell copies of the Software, and to permit persons to whom the
	10	* Software is furnished to do so, subject to the following conditions:
	11	*
	12	* The above copyright notice and this permission notice (including the next
	13	* paragraph) shall be included in all copies or substantial portions of the
	14	* Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	21	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
	22	* DEALINGS IN THE SOFTWARE.
	23	*
	24	* Authors:
	25	* Eric Anholt <eric@anholt.net>
	26	* Jesse Barnes <jesse.barnes@intel.com>
	27	*/
	28
	29	#include <linux/i2c.h>
	30	#include <linux/delay.h>
	31	#include "drmP.h"
	32	#include "drm.h"
	33	#include "drm_crtc.h"
	34	#include "intel_drv.h"
	35	#include "i915_drm.h"
	36	#include "i915_drv.h"
	37
	38	struct intel_hdmi_priv {
	39	u32 sdvox_reg;
	40	u32 save_SDVOX;
9dff6af8	41	bool has_hdmi_sink;
7d57382e EA	42	};
	43
	44	static void intel_hdmi_mode_set(struct drm_encoder *encoder,
	45	struct drm_display_mode *mode,
	46	struct drm_display_mode *adjusted_mode)
	47	{
	48	struct drm_device *dev = encoder->dev;
	49	struct drm_i915_private *dev_priv = dev->dev_private;
	50	struct drm_crtc *crtc = encoder->crtc;
	51	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
	52	struct intel_output *intel_output = enc_to_intel_output(encoder);
	53	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	54	u32 sdvox;
	55
	56	sdvox = SDVO_ENCODING_HDMI \|
	57	SDVO_BORDER_ENABLE \|
	58	SDVO_VSYNC_ACTIVE_HIGH \|
30ad48b7 ZW	59	SDVO_HSYNC_ACTIVE_HIGH \|
30ad48b7 ZW	60	SDVO_NULL_PACKETS_DURING_VSYNC;
7d57382e EA	61
	62	if (hdmi_priv->has_hdmi_sink)
	63	sdvox \|= SDVO_AUDIO_ENABLE;
	64
	65	if (intel_crtc->pipe == 1)
	66	sdvox \|= SDVO_PIPE_B_SELECT;
	67
	68	I915_WRITE(hdmi_priv->sdvox_reg, sdvox);
	69	POSTING_READ(hdmi_priv->sdvox_reg);
	70	}
	71
	72	static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
	73	{
	74	struct drm_device *dev = encoder->dev;
	75	struct drm_i915_private *dev_priv = dev->dev_private;
	76	struct intel_output *intel_output = enc_to_intel_output(encoder);
	77	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	78	u32 temp;
	79
	80	if (mode != DRM_MODE_DPMS_ON) {
	81	temp = I915_READ(hdmi_priv->sdvox_reg);
	82	I915_WRITE(hdmi_priv->sdvox_reg, temp & ~SDVO_ENABLE);
	83	} else {
	84	temp = I915_READ(hdmi_priv->sdvox_reg);
	85	I915_WRITE(hdmi_priv->sdvox_reg, temp \| SDVO_ENABLE);
	86	}
	87	POSTING_READ(hdmi_priv->sdvox_reg);
	88	}
	89
	90	static void intel_hdmi_save(struct drm_connector *connector)
	91	{
	92	struct drm_device *dev = connector->dev;
	93	struct drm_i915_private *dev_priv = dev->dev_private;
	94	struct intel_output *intel_output = to_intel_output(connector);
	95	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	96
	97	hdmi_priv->save_SDVOX = I915_READ(hdmi_priv->sdvox_reg);
	98	}
	99
	100	static void intel_hdmi_restore(struct drm_connector *connector)
	101	{
	102	struct drm_device *dev = connector->dev;
	103	struct drm_i915_private *dev_priv = dev->dev_private;
	104	struct intel_output *intel_output = to_intel_output(connector);
	105	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	106
	107	I915_WRITE(hdmi_priv->sdvox_reg, hdmi_priv->save_SDVOX);
	108	POSTING_READ(hdmi_priv->sdvox_reg);
	109	}
	110
	111	static int intel_hdmi_mode_valid(struct drm_connector *connector,
	112	struct drm_display_mode *mode)
	113	{
	114	if (mode->clock > 165000)
	115	return MODE_CLOCK_HIGH;
	116	if (mode->clock < 20000)
	117	return MODE_CLOCK_HIGH;
	118
	119	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
	120	return MODE_NO_DBLESCAN;
	121
	122	return MODE_OK;
	123	}
	124
125	static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
126	struct drm_display_mode *mode,
127	struct drm_display_mode *adjusted_mode)
128	{
129	return true;
130	}
131
9dff6af8 ML	132	static void
	133	intel_hdmi_sink_detect(struct drm_connector *connector)
	134	{
	135	struct intel_output *intel_output = to_intel_output(connector);
	136	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	137	struct edid *edid = NULL;
	138
	139	edid = drm_get_edid(&intel_output->base,
	140	&intel_output->ddc_bus->adapter);
	141	if (edid != NULL) {
	142	hdmi_priv->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
	143	kfree(edid);
	144	intel_output->base.display_info.raw_edid = NULL;
	145	}
	146	}
	147
30ad48b7 ZW	148	static enum drm_connector_status
	149	igdng_hdmi_detect(struct drm_connector *connector)
	150	{
	151	struct intel_output *intel_output = to_intel_output(connector);
	152	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	153
	154	/* FIXME hotplug detect */
	155
	156	hdmi_priv->has_hdmi_sink = false;
	157	intel_hdmi_sink_detect(connector);
	158	if (hdmi_priv->has_hdmi_sink)
	159	return connector_status_connected;
	160	else
	161	return connector_status_disconnected;
	162	}
	163
7d57382e EA	164	static enum drm_connector_status
	165	intel_hdmi_detect(struct drm_connector *connector)
	166	{
	167	struct drm_device *dev = connector->dev;
	168	struct drm_i915_private *dev_priv = dev->dev_private;
	169	struct intel_output *intel_output = to_intel_output(connector);
	170	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	171	u32 temp, bit;
	172
30ad48b7 ZW	173	if (IS_IGDNG(dev))
	174	return igdng_hdmi_detect(connector);
	175
7d57382e EA	176	temp = I915_READ(PORT_HOTPLUG_EN);
7d57382e EA	177
9d2949a4 ML	178	switch (hdmi_priv->sdvox_reg) {
	179	case SDVOB:
	180	temp \|= HDMIB_HOTPLUG_INT_EN;
	181	break;
	182	case SDVOC:
	183	temp \|= HDMIC_HOTPLUG_INT_EN;
	184	break;
	185	default:
	186	return connector_status_unknown;
	187	}
	188
	189	I915_WRITE(PORT_HOTPLUG_EN, temp);
7d57382e EA	190
	191	POSTING_READ(PORT_HOTPLUG_EN);
	192
	193	switch (hdmi_priv->sdvox_reg) {
	194	case SDVOB:
	195	bit = HDMIB_HOTPLUG_INT_STATUS;
	196	break;
	197	case SDVOC:
	198	bit = HDMIC_HOTPLUG_INT_STATUS;
	199	break;
	200	default:
	201	return connector_status_unknown;
	202	}
	203
9dff6af8 ML	204	if ((I915_READ(PORT_HOTPLUG_STAT) & bit) != 0) {
9dff6af8 ML	205	intel_hdmi_sink_detect(connector);
7d57382e	206	return connector_status_connected;
9dff6af8	207	} else
7d57382e EA	208	return connector_status_disconnected;
	209	}
	210
	211	static int intel_hdmi_get_modes(struct drm_connector *connector)
	212	{
	213	struct intel_output *intel_output = to_intel_output(connector);
	214
	215	/* We should parse the EDID data and find out if it's an HDMI sink so
	216	* we can send audio to it.
	217	*/
	218
	219	return intel_ddc_get_modes(intel_output);
	220	}
	221
	222	static void intel_hdmi_destroy(struct drm_connector *connector)
	223	{
	224	struct intel_output *intel_output = to_intel_output(connector);
	225
	226	if (intel_output->i2c_bus)
	227	intel_i2c_destroy(intel_output->i2c_bus);
	228	drm_sysfs_connector_remove(connector);
	229	drm_connector_cleanup(connector);
	230	kfree(intel_output);
	231	}
	232
	233	static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
	234	.dpms = intel_hdmi_dpms,
	235	.mode_fixup = intel_hdmi_mode_fixup,
	236	.prepare = intel_encoder_prepare,
	237	.mode_set = intel_hdmi_mode_set,
	238	.commit = intel_encoder_commit,
	239	};
	240
	241	static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
c9fb15f6	242	.dpms = drm_helper_connector_dpms,
7d57382e EA	243	.save = intel_hdmi_save,
	244	.restore = intel_hdmi_restore,
	245	.detect = intel_hdmi_detect,
	246	.fill_modes = drm_helper_probe_single_connector_modes,
	247	.destroy = intel_hdmi_destroy,
	248	};
	249
	250	static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
	251	.get_modes = intel_hdmi_get_modes,
	252	.mode_valid = intel_hdmi_mode_valid,
	253	.best_encoder = intel_best_encoder,
	254	};
	255
	256	static void intel_hdmi_enc_destroy(struct drm_encoder *encoder)
	257	{
	258	drm_encoder_cleanup(encoder);
	259	}
	260
	261	static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
	262	.destroy = intel_hdmi_enc_destroy,
	263	};
	264
	265
	266	void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
	267	{
	268	struct drm_i915_private *dev_priv = dev->dev_private;
	269	struct drm_connector *connector;
	270	struct intel_output *intel_output;
	271	struct intel_hdmi_priv *hdmi_priv;
	272
	273	intel_output = kcalloc(sizeof(struct intel_output) +
	274	sizeof(struct intel_hdmi_priv), 1, GFP_KERNEL);
	275	if (!intel_output)
	276	return;
	277	hdmi_priv = (struct intel_hdmi_priv *)(intel_output + 1);
	278
	279	connector = &intel_output->base;
	280	drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
	281	DRM_MODE_CONNECTOR_DVID);
	282	drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
	283
	284	intel_output->type = INTEL_OUTPUT_HDMI;
	285
	286	connector->interlace_allowed = 0;
	287	connector->doublescan_allowed = 0;
	288
	289	/* Set up the DDC bus. */
	290	if (sdvox_reg == SDVOB)
	291	intel_output->ddc_bus = intel_i2c_create(dev, GPIOE, "HDMIB");
30ad48b7	292	else if (sdvox_reg == SDVOC)
7d57382e	293	intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "HDMIC");
30ad48b7 ZW	294	else if (sdvox_reg == HDMIB)
	295	intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOE,
	296	"HDMIB");
	297	else if (sdvox_reg == HDMIC)
	298	intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOD,
	299	"HDMIC");
	300	else if (sdvox_reg == HDMID)
	301	intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOF,
	302	"HDMID");
7d57382e EA	303
	304	if (!intel_output->ddc_bus)
	305	goto err_connector;
	306
	307	hdmi_priv->sdvox_reg = sdvox_reg;
	308	intel_output->dev_priv = hdmi_priv;
	309
	310	drm_encoder_init(dev, &intel_output->enc, &intel_hdmi_enc_funcs,
	311	DRM_MODE_ENCODER_TMDS);
	312	drm_encoder_helper_add(&intel_output->enc, &intel_hdmi_helper_funcs);
	313
	314	drm_mode_connector_attach_encoder(&intel_output->base,
	315	&intel_output->enc);
	316	drm_sysfs_connector_add(connector);
	317
	318	/* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
	319	* 0xd. Failure to do so will result in spurious interrupts being
	320	* generated on the port when a cable is not attached.
	321	*/
	322	if (IS_G4X(dev) && !IS_GM45(dev)) {
	323	u32 temp = I915_READ(PEG_BAND_GAP_DATA);
	324	I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) \| 0xd);
	325	}
	326
	327	return;
	328
	329	err_connector:
	330	drm_connector_cleanup(connector);
	331	kfree(intel_output);
	332
	333	return;
	334	}