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/*

 * Copyright 2006 Dave Airlie 

 * 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 

 *	Jesse Barnes 

 */

#include 

#include 

//#include 

#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;

	uint32_t color_range;

	bool has_hdmi_sink;

	bool has_audio;

	int force_audio;

	void (*write_infoframe)(struct drm_encoder *encoder,

				struct dip_infoframe *frame);

};

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 *frame)

{

	uint8_t *data = (uint8_t *)frame;

	uint8_t sum = 0;

	unsigned i;

	frame->checksum = 0;

	frame->ecc = 0;

	for (i = 0; i < frame->len + DIP_HEADER_SIZE; i++)

		sum += data[i];

	frame->checksum = 0x100 - sum;

}

static u32 intel_infoframe_index(struct dip_infoframe *frame)

{

	u32 flags = 0;

	switch (frame->type) {

	case DIP_TYPE_AVI:

		flags |= VIDEO_DIP_SELECT_AVI;

		break;

	case DIP_TYPE_SPD:

		flags |= VIDEO_DIP_SELECT_SPD;

		break;

	default:

		DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);

		break;

	}

	return flags;

}

static u32 intel_infoframe_flags(struct dip_infoframe *frame)

{

	u32 flags = 0;

	switch (frame->type) {

	case DIP_TYPE_AVI:

		flags |= VIDEO_DIP_ENABLE_AVI | VIDEO_DIP_FREQ_VSYNC;

		break;

	case DIP_TYPE_SPD:

		flags |= VIDEO_DIP_ENABLE_SPD | VIDEO_DIP_FREQ_VSYNC;

		break;

	default:

		DRM_DEBUG_DRIVER("unknown info frame type %d\n", frame->type);

		break;

	}

	return flags;

}

static void i9xx_write_infoframe(struct drm_encoder *encoder,

				 struct dip_infoframe *frame)

{

	uint32_t *data = (uint32_t *)frame;

	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, flags, val = I915_READ(VIDEO_DIP_CTL);

	unsigned i, len = DIP_HEADER_SIZE + frame->len;

	/* 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;

	flags = intel_infoframe_index(frame);

	val &= ~VIDEO_DIP_SELECT_MASK;

	I915_WRITE(VIDEO_DIP_CTL, val | port | flags);

	for (i = 0; i < len; i += 4) {

		I915_WRITE(VIDEO_DIP_DATA, *data);

		data++;

	}

	flags |= intel_infoframe_flags(frame);

	I915_WRITE(VIDEO_DIP_CTL, VIDEO_DIP_ENABLE | val | port | flags);

}

static void ironlake_write_infoframe(struct drm_encoder *encoder,

				     struct dip_infoframe *frame)

{

	uint32_t *data = (uint32_t *)frame;

	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);

	int reg = TVIDEO_DIP_CTL(intel_crtc->pipe);

	unsigned i, len = DIP_HEADER_SIZE + frame->len;

	u32 flags, val = I915_READ(reg);

	intel_wait_for_vblank(dev, intel_crtc->pipe);

	flags = intel_infoframe_index(frame);

	val &= ~(VIDEO_DIP_SELECT_MASK | 0xf); /* clear DIP data offset */

	I915_WRITE(reg, VIDEO_DIP_ENABLE | val | flags);

	for (i = 0; i < len; i += 4) {

		I915_WRITE(TVIDEO_DIP_DATA(intel_crtc->pipe), *data);

		data++;

	}

	flags |= intel_infoframe_flags(frame);

	I915_WRITE(reg, VIDEO_DIP_ENABLE | val | flags);

}

static void intel_set_infoframe(struct drm_encoder *encoder,

				struct dip_infoframe *frame)

{

	struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);

	if (!intel_hdmi->has_hdmi_sink)

		return;

	intel_dip_infoframe_csum(frame);

	intel_hdmi->write_infoframe(encoder, frame);

}

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,

	};

	intel_set_infoframe(encoder, &avi_if);

}

static void intel_hdmi_set_spd_infoframe(struct drm_encoder *encoder)

{

	struct dip_infoframe spd_if;

	memset(&spd_if, 0, sizeof(spd_if));

	spd_if.type = DIP_TYPE_SPD;

	spd_if.ver = DIP_VERSION_SPD;

	spd_if.len = DIP_LEN_SPD;

	strcpy(spd_if.body.spd.vn, "Intel");

	strcpy(spd_if.body.spd.pd, "Integrated gfx");

	spd_if.body.spd.sdi = DIP_SPD_PC;

	intel_set_infoframe(encoder, &spd_if);

}

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 (!HAS_PCH_SPLIT(dev))

		sdvox |= intel_hdmi->color_range;

	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;

	if (intel_crtc->bpp > 24)

		sdvox |= COLOR_FORMAT_12bpc;

	else

		sdvox |= COLOR_FORMAT_8bpc;

	/* Required on CPT */

	if (intel_hdmi->has_hdmi_sink && HAS_PCH_CPT(dev))

		sdvox |= HDMI_MODE_SELECT;

	if (intel_hdmi->has_audio) {

		DRM_DEBUG_DRIVER("Enabling HDMI audio on pipe %c\n",

				 pipe_name(intel_crtc->pipe));

		sdvox |= SDVO_AUDIO_ENABLE;

		sdvox |= SDVO_NULL_PACKETS_DURING_VSYNC;

		intel_write_eld(encoder, adjusted_mode);

	}

		if (HAS_PCH_CPT(dev))

		sdvox |= PORT_TRANS_SEL_CPT(intel_crtc->pipe);

	else if (intel_crtc->pipe == 1)

			sdvox |= SDVO_PIPE_B_SELECT;

	I915_WRITE(intel_hdmi->sdvox_reg, sdvox);

	POSTING_READ(intel_hdmi->sdvox_reg);

	intel_hdmi_set_avi_infoframe(encoder);

	intel_hdmi_set_spd_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;

	u32 enable_bits = SDVO_ENABLE;

	if (intel_hdmi->has_audio)

		enable_bits |= SDVO_AUDIO_ENABLE;

	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 &= ~enable_bits;

	} else {

		temp |= enable_bits;

	}

	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_LOW;

	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);

	struct drm_i915_private *dev_priv = connector->dev->dev_private;

	int ret;

	ret = drm_connector_property_set_value(connector, property, val);

	if (ret)

		return ret;

#if 0

	if (property == dev_priv->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;

	}

	if (property == dev_priv->broadcast_rgb_property) {

		if (val == !!intel_hdmi->color_range)

			return 0;

		intel_hdmi->color_range = val ? SDVO_COLOR_RANGE_16_235 : 0;

		goto done;

	}

#endif

	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)

{

	intel_attach_force_audio_property(connector);

	intel_attach_broadcast_rgb_property(connector);

}

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;

	int i;

	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) | (1 << 2);

	/* 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;

	if (!HAS_PCH_SPLIT(dev)) {

		intel_hdmi->write_infoframe = i9xx_write_infoframe;

		I915_WRITE(VIDEO_DIP_CTL, 0);

	} else {

		intel_hdmi->write_infoframe = ironlake_write_infoframe;

		for_each_pipe(i)

			I915_WRITE(TVIDEO_DIP_CTL(i), 0);

	}

	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);

	}

}