[linux-2.6-block.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 "drm_edid.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;

	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;

	temp = I915_READ(hdmi_priv->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 (IS_IRONLAKE(dev)) {
		I915_WRITE(hdmi_priv->sdvox_reg, temp & ~SDVO_ENABLE);
		POSTING_READ(hdmi_priv->sdvox_reg);
	}

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

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

	/* HW workaround, need to write this twice for issue that may result
	 * in first write getting masked.
	 */
	if (IS_IRONLAKE(dev)) {
		I915_WRITE(hdmi_priv->sdvox_reg, temp);
		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 enum drm_connector_status
intel_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;
	struct edid *edid = NULL;
	enum drm_connector_status status = connector_status_disconnected;

	hdmi_priv->has_hdmi_sink = false;
	edid = drm_get_edid(&intel_output->base,
			    intel_output->ddc_bus);

	if (edid) {
		if (edid->input & DRM_EDID_INPUT_DIGITAL) {
			status = connector_status_connected;
			hdmi_priv->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
		}
		intel_output->base.display_info.raw_edid = NULL;
		kfree(edid);
	}

	return status;
}

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,
};

/*
 * Enumerate the child dev array parsed from VBT to check whether
 * the given HDMI is present.
 * If it is present, return 1.
 * If it is not present, return false.
 * If no child dev is parsed from VBT, it assumes that the given
 * HDMI is present.
 */
static int hdmi_is_present_in_vbt(struct drm_device *dev, int hdmi_reg)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct child_device_config *p_child;
	int i, hdmi_port, ret;

	if (!dev_priv->child_dev_num)
		return 1;

	if (hdmi_reg == SDVOB)
		hdmi_port = DVO_B;
	else if (hdmi_reg == SDVOC)
		hdmi_port = DVO_C;
	else if (hdmi_reg == HDMIB)
		hdmi_port = DVO_B;
	else if (hdmi_reg == HDMIC)
		hdmi_port = DVO_C;
	else if (hdmi_reg == HDMID)
		hdmi_port = DVO_D;
	else
		return 0;

	ret = 0;
	for (i = 0; i < dev_priv->child_dev_num; i++) {
		p_child = dev_priv->child_dev + i;
		/*
		 * If the device type is not HDMI, continue.
		 */
		if (p_child->device_type != DEVICE_TYPE_HDMI)
			continue;
		/* Find the HDMI port */
		if (p_child->dvo_port == hdmi_port) {
			ret = 1;
			break;
		}
	}
	return ret;
}
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;

	if (!hdmi_is_present_in_vbt(dev, sdvox_reg)) {
		DRM_DEBUG_KMS("HDMI is not present. Ignored it \n");
		return;
	}
	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_HDMIA);
	drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);

	intel_output->type = INTEL_OUTPUT_HDMI;

	connector->interlace_allowed = 0;
	connector->doublescan_allowed = 0;
	intel_output->crtc_mask = (1 << 0) | (1 << 1);

	/* Set up the DDC bus. */
	if (sdvox_reg == SDVOB) {
		intel_output->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
		intel_output->ddc_bus = intel_i2c_create(dev, GPIOE, "HDMIB");
	} else if (sdvox_reg == SDVOC) {
		intel_output->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
		intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "HDMIC");
	} else if (sdvox_reg == HDMIB) {
		intel_output->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
		intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOE,
								"HDMIB");
	} else if (sdvox_reg == HDMIC) {
		intel_output->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
		intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOD,
								"HDMIC");
	} else if (sdvox_reg == HDMID) {
		intel_output->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
		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"
aa93d632	34	#include "drm_edid.h"
7d57382e EA	35	#include "intel_drv.h"
	36	#include "i915_drm.h"
	37	#include "i915_drv.h"
	38
	39	struct intel_hdmi_priv {
	40	u32 sdvox_reg;
	41	u32 save_SDVOX;
9dff6af8	42	bool has_hdmi_sink;
7d57382e EA	43	};
	44
	45	static void intel_hdmi_mode_set(struct drm_encoder *encoder,
	46	struct drm_display_mode *mode,
	47	struct drm_display_mode *adjusted_mode)
	48	{
	49	struct drm_device *dev = encoder->dev;
	50	struct drm_i915_private *dev_priv = dev->dev_private;
	51	struct drm_crtc *crtc = encoder->crtc;
	52	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
	53	struct intel_output *intel_output = enc_to_intel_output(encoder);
	54	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	55	u32 sdvox;
	56
	57	sdvox = SDVO_ENCODING_HDMI \|
	58	SDVO_BORDER_ENABLE \|
	59	SDVO_VSYNC_ACTIVE_HIGH \|
56d21b07	60	SDVO_HSYNC_ACTIVE_HIGH;
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
d8a2d0e0 ZW	80	temp = I915_READ(hdmi_priv->sdvox_reg);
	81
	82	/* HW workaround, need to toggle enable bit off and on for 12bpc, but
	83	* we do this anyway which shows more stable in testing.
	84	*/
f2b115e6	85	if (IS_IRONLAKE(dev)) {
7d57382e	86	I915_WRITE(hdmi_priv->sdvox_reg, temp & ~SDVO_ENABLE);
d8a2d0e0 ZW	87	POSTING_READ(hdmi_priv->sdvox_reg);
	88	}
	89
	90	if (mode != DRM_MODE_DPMS_ON) {
	91	temp &= ~SDVO_ENABLE;
7d57382e	92	} else {
d8a2d0e0	93	temp \|= SDVO_ENABLE;
7d57382e	94	}
d8a2d0e0 ZW	95
d8a2d0e0 ZW	96	I915_WRITE(hdmi_priv->sdvox_reg, temp);
7d57382e	97	POSTING_READ(hdmi_priv->sdvox_reg);
d8a2d0e0 ZW	98
	99	/* HW workaround, need to write this twice for issue that may result
	100	* in first write getting masked.
	101	*/
f2b115e6	102	if (IS_IRONLAKE(dev)) {
d8a2d0e0 ZW	103	I915_WRITE(hdmi_priv->sdvox_reg, temp);
	104	POSTING_READ(hdmi_priv->sdvox_reg);
	105	}
7d57382e EA	106	}
	107
	108	static void intel_hdmi_save(struct drm_connector *connector)
	109	{
	110	struct drm_device *dev = connector->dev;
	111	struct drm_i915_private *dev_priv = dev->dev_private;
	112	struct intel_output *intel_output = to_intel_output(connector);
	113	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	114
	115	hdmi_priv->save_SDVOX = I915_READ(hdmi_priv->sdvox_reg);
	116	}
	117
	118	static void intel_hdmi_restore(struct drm_connector *connector)
	119	{
	120	struct drm_device *dev = connector->dev;
	121	struct drm_i915_private *dev_priv = dev->dev_private;
	122	struct intel_output *intel_output = to_intel_output(connector);
	123	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	124
	125	I915_WRITE(hdmi_priv->sdvox_reg, hdmi_priv->save_SDVOX);
	126	POSTING_READ(hdmi_priv->sdvox_reg);
	127	}
	128
	129	static int intel_hdmi_mode_valid(struct drm_connector *connector,
	130	struct drm_display_mode *mode)
	131	{
	132	if (mode->clock > 165000)
	133	return MODE_CLOCK_HIGH;
	134	if (mode->clock < 20000)
	135	return MODE_CLOCK_HIGH;
	136
	137	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
	138	return MODE_NO_DBLESCAN;
	139
	140	return MODE_OK;
	141	}
	142
	143	static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
	144	struct drm_display_mode *mode,
	145	struct drm_display_mode *adjusted_mode)
	146	{
	147	return true;
	148	}
	149
aa93d632	150	static enum drm_connector_status
2ded9e27	151	intel_hdmi_detect(struct drm_connector *connector)
9dff6af8 ML	152	{
	153	struct intel_output *intel_output = to_intel_output(connector);
	154	struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
	155	struct edid *edid = NULL;
aa93d632	156	enum drm_connector_status status = connector_status_disconnected;
9dff6af8	157
2ded9e27	158	hdmi_priv->has_hdmi_sink = false;
9dff6af8	159	edid = drm_get_edid(&intel_output->base,
f9c10a9b	160	intel_output->ddc_bus);
2ded9e27	161
aa93d632	162	if (edid) {
be9f1c4f	163	if (edid->input & DRM_EDID_INPUT_DIGITAL) {
aa93d632 KP	164	status = connector_status_connected;
	165	hdmi_priv->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
	166	}
9dff6af8	167	intel_output->base.display_info.raw_edid = NULL;
aa93d632	168	kfree(edid);
9dff6af8	169	}
30ad48b7	170
2ded9e27	171	return status;
7d57382e EA	172	}
	173
	174	static int intel_hdmi_get_modes(struct drm_connector *connector)
	175	{
	176	struct intel_output *intel_output = to_intel_output(connector);
	177
	178	/* We should parse the EDID data and find out if it's an HDMI sink so
	179	* we can send audio to it.
	180	*/
	181
	182	return intel_ddc_get_modes(intel_output);
	183	}
	184
	185	static void intel_hdmi_destroy(struct drm_connector *connector)
	186	{
	187	struct intel_output *intel_output = to_intel_output(connector);
	188
	189	if (intel_output->i2c_bus)
	190	intel_i2c_destroy(intel_output->i2c_bus);
	191	drm_sysfs_connector_remove(connector);
	192	drm_connector_cleanup(connector);
	193	kfree(intel_output);
	194	}
	195
	196	static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
	197	.dpms = intel_hdmi_dpms,
	198	.mode_fixup = intel_hdmi_mode_fixup,
	199	.prepare = intel_encoder_prepare,
	200	.mode_set = intel_hdmi_mode_set,
	201	.commit = intel_encoder_commit,
	202	};
	203
	204	static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
c9fb15f6	205	.dpms = drm_helper_connector_dpms,
7d57382e EA	206	.save = intel_hdmi_save,
	207	.restore = intel_hdmi_restore,
	208	.detect = intel_hdmi_detect,
	209	.fill_modes = drm_helper_probe_single_connector_modes,
	210	.destroy = intel_hdmi_destroy,
	211	};
	212
	213	static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
	214	.get_modes = intel_hdmi_get_modes,
	215	.mode_valid = intel_hdmi_mode_valid,
	216	.best_encoder = intel_best_encoder,
	217	};
	218
	219	static void intel_hdmi_enc_destroy(struct drm_encoder *encoder)
	220	{
	221	drm_encoder_cleanup(encoder);
	222	}
	223
	224	static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
	225	.destroy = intel_hdmi_enc_destroy,
	226	};
	227
fc816655 ZY	228	/*
	229	* Enumerate the child dev array parsed from VBT to check whether
	230	* the given HDMI is present.
	231	* If it is present, return 1.
	232	* If it is not present, return false.
	233	* If no child dev is parsed from VBT, it assumes that the given
	234	* HDMI is present.
	235	*/
6e36595a	236	static int hdmi_is_present_in_vbt(struct drm_device *dev, int hdmi_reg)
fc816655 ZY	237	{
	238	struct drm_i915_private *dev_priv = dev->dev_private;
	239	struct child_device_config *p_child;
	240	int i, hdmi_port, ret;
	241
	242	if (!dev_priv->child_dev_num)
	243	return 1;
	244
	245	if (hdmi_reg == SDVOB)
	246	hdmi_port = DVO_B;
	247	else if (hdmi_reg == SDVOC)
	248	hdmi_port = DVO_C;
	249	else if (hdmi_reg == HDMIB)
	250	hdmi_port = DVO_B;
	251	else if (hdmi_reg == HDMIC)
	252	hdmi_port = DVO_C;
	253	else if (hdmi_reg == HDMID)
	254	hdmi_port = DVO_D;
	255	else
	256	return 0;
	257
	258	ret = 0;
	259	for (i = 0; i < dev_priv->child_dev_num; i++) {
	260	p_child = dev_priv->child_dev + i;
	261	/*
	262	* If the device type is not HDMI, continue.
	263	*/
	264	if (p_child->device_type != DEVICE_TYPE_HDMI)
	265	continue;
	266	/* Find the HDMI port */
	267	if (p_child->dvo_port == hdmi_port) {
	268	ret = 1;
	269	break;
	270	}
	271	}
	272	return ret;
	273	}
7d57382e EA	274	void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
	275	{
	276	struct drm_i915_private *dev_priv = dev->dev_private;
	277	struct drm_connector *connector;
	278	struct intel_output *intel_output;
	279	struct intel_hdmi_priv *hdmi_priv;
	280
fc816655 ZY	281	if (!hdmi_is_present_in_vbt(dev, sdvox_reg)) {
	282	DRM_DEBUG_KMS("HDMI is not present. Ignored it \n");
	283	return;
	284	}
7d57382e EA	285	intel_output = kcalloc(sizeof(struct intel_output) +
	286	sizeof(struct intel_hdmi_priv), 1, GFP_KERNEL);
	287	if (!intel_output)
	288	return;
	289	hdmi_priv = (struct intel_hdmi_priv *)(intel_output + 1);
	290
	291	connector = &intel_output->base;
	292	drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
8d91104a	293	DRM_MODE_CONNECTOR_HDMIA);
7d57382e EA	294	drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
	295
	296	intel_output->type = INTEL_OUTPUT_HDMI;
	297
	298	connector->interlace_allowed = 0;
	299	connector->doublescan_allowed = 0;
f8aed700	300	intel_output->crtc_mask = (1 << 0) \| (1 << 1);
7d57382e EA	301
7d57382e EA	302	/* Set up the DDC bus. */
f8aed700 ML	303	if (sdvox_reg == SDVOB) {
f8aed700 ML	304	intel_output->clone_mask = (1 << INTEL_HDMIB_CLONE_BIT);
7d57382e	305	intel_output->ddc_bus = intel_i2c_create(dev, GPIOE, "HDMIB");
f8aed700 ML	306	} else if (sdvox_reg == SDVOC) {
f8aed700 ML	307	intel_output->clone_mask = (1 << INTEL_HDMIC_CLONE_BIT);
7d57382e	308	intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "HDMIC");
f8aed700 ML	309	} else if (sdvox_reg == HDMIB) {
f8aed700 ML	310	intel_output->clone_mask = (1 << INTEL_HDMID_CLONE_BIT);
30ad48b7 ZW	311	intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOE,
30ad48b7 ZW	312	"HDMIB");
f8aed700 ML	313	} else if (sdvox_reg == HDMIC) {
f8aed700 ML	314	intel_output->clone_mask = (1 << INTEL_HDMIE_CLONE_BIT);
30ad48b7 ZW	315	intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOD,
30ad48b7 ZW	316	"HDMIC");
f8aed700 ML	317	} else if (sdvox_reg == HDMID) {
f8aed700 ML	318	intel_output->clone_mask = (1 << INTEL_HDMIF_CLONE_BIT);
30ad48b7 ZW	319	intel_output->ddc_bus = intel_i2c_create(dev, PCH_GPIOF,
30ad48b7 ZW	320	"HDMID");
f8aed700	321	}
7d57382e EA	322	if (!intel_output->ddc_bus)
	323	goto err_connector;
	324
	325	hdmi_priv->sdvox_reg = sdvox_reg;
	326	intel_output->dev_priv = hdmi_priv;
	327
	328	drm_encoder_init(dev, &intel_output->enc, &intel_hdmi_enc_funcs,
	329	DRM_MODE_ENCODER_TMDS);
	330	drm_encoder_helper_add(&intel_output->enc, &intel_hdmi_helper_funcs);
	331
	332	drm_mode_connector_attach_encoder(&intel_output->base,
	333	&intel_output->enc);
	334	drm_sysfs_connector_add(connector);
	335
	336	/* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
	337	* 0xd. Failure to do so will result in spurious interrupts being
	338	* generated on the port when a cable is not attached.
	339	*/
	340	if (IS_G4X(dev) && !IS_GM45(dev)) {
	341	u32 temp = I915_READ(PEG_BAND_GAP_DATA);
	342	I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) \| 0xd);
	343	}
	344
	345	return;
	346
	347	err_connector:
	348	drm_connector_cleanup(connector);
	349	kfree(intel_output);
	350
	351	return;
	352	}