drivers/gpu/drm/i915/intel_hdmi.c - maze/linux - Git at Google

 /*
  * 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;

 	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
 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;

 	temp = I915_READ(PORT_HOTPLUG_EN);

 	I915_WRITE(PORT_HOTPLUG_EN,
 		   temp |
 		   HDMIB_HOTPLUG_INT_EN |
 		   HDMIC_HOTPLUG_INT_EN |
 		   HDMID_HOTPLUG_INT_EN);

 	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 = {
 	.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
 		intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "HDMIC");

 	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;
 }
	/*
	* 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;

	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
	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;

	temp = I915_READ(PORT_HOTPLUG_EN);

	I915_WRITE(PORT_HOTPLUG_EN,
	temp \|
	HDMIB_HOTPLUG_INT_EN \|
	HDMIC_HOTPLUG_INT_EN \|
	HDMID_HOTPLUG_INT_EN);

	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 = {
	.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
	intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "HDMIC");

	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;
	}