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+/*
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+ * Copyright 2006 Dave Airlie <airlied@linux.ie>
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+ * Copyright © 2006-2009 Intel Corporation
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+ *
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+ * Permission is hereby granted, free of charge, to any person obtaining a
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+ * copy of this software and associated documentation files (the "Software"),
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+ * to deal in the Software without restriction, including without limitation
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+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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+ * and/or sell copies of the Software, and to permit persons to whom the
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+ * Software is furnished to do so, subject to the following conditions:
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+ *
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+ * The above copyright notice and this permission notice (including the next
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+ * paragraph) shall be included in all copies or substantial portions of the
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+ * Software.
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+ *
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+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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+ * DEALINGS IN THE SOFTWARE.
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+ *
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+ * Authors:
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+ * Eric Anholt <eric@anholt.net>
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+ * Jesse Barnes <jesse.barnes@intel.com>
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+ */
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+
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+#include <linux/i2c.h>
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+#include <linux/delay.h>
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+#include "drmP.h"
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+#include "drm.h"
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+#include "drm_crtc.h"
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+#include "intel_drv.h"
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+#include "i915_drm.h"
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+#include "i915_drv.h"
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+
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+struct intel_hdmi_priv {
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+ u32 sdvox_reg;
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+ u32 save_SDVOX;
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+ int has_hdmi_sink;
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+};
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+
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+static void intel_hdmi_mode_set(struct drm_encoder *encoder,
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+ struct drm_display_mode *mode,
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+ struct drm_display_mode *adjusted_mode)
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+{
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+ struct drm_device *dev = encoder->dev;
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+ struct drm_i915_private *dev_priv = dev->dev_private;
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+ struct drm_crtc *crtc = encoder->crtc;
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+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
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+ struct intel_output *intel_output = enc_to_intel_output(encoder);
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+ struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
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+ u32 sdvox;
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+
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+ sdvox = SDVO_ENCODING_HDMI |
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+ SDVO_BORDER_ENABLE |
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+ SDVO_VSYNC_ACTIVE_HIGH |
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+ SDVO_HSYNC_ACTIVE_HIGH;
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+
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+ if (hdmi_priv->has_hdmi_sink)
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+ sdvox |= SDVO_AUDIO_ENABLE;
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+
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+ if (intel_crtc->pipe == 1)
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+ sdvox |= SDVO_PIPE_B_SELECT;
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+
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+ I915_WRITE(hdmi_priv->sdvox_reg, sdvox);
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+ POSTING_READ(hdmi_priv->sdvox_reg);
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+}
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+
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+static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
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+{
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+ struct drm_device *dev = encoder->dev;
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+ struct drm_i915_private *dev_priv = dev->dev_private;
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+ struct intel_output *intel_output = enc_to_intel_output(encoder);
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+ struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
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+ u32 temp;
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+
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+ if (mode != DRM_MODE_DPMS_ON) {
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+ temp = I915_READ(hdmi_priv->sdvox_reg);
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+ I915_WRITE(hdmi_priv->sdvox_reg, temp & ~SDVO_ENABLE);
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+ } else {
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+ temp = I915_READ(hdmi_priv->sdvox_reg);
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+ I915_WRITE(hdmi_priv->sdvox_reg, temp | SDVO_ENABLE);
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+ }
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+ POSTING_READ(hdmi_priv->sdvox_reg);
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+}
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+
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+static void intel_hdmi_save(struct drm_connector *connector)
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+{
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+ struct drm_device *dev = connector->dev;
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+ struct drm_i915_private *dev_priv = dev->dev_private;
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+ struct intel_output *intel_output = to_intel_output(connector);
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+ struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
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+
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+ hdmi_priv->save_SDVOX = I915_READ(hdmi_priv->sdvox_reg);
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+}
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+
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+static void intel_hdmi_restore(struct drm_connector *connector)
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+{
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+ struct drm_device *dev = connector->dev;
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+ struct drm_i915_private *dev_priv = dev->dev_private;
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+ struct intel_output *intel_output = to_intel_output(connector);
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+ struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
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+
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+ I915_WRITE(hdmi_priv->sdvox_reg, hdmi_priv->save_SDVOX);
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+ POSTING_READ(hdmi_priv->sdvox_reg);
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+}
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+
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+static int intel_hdmi_mode_valid(struct drm_connector *connector,
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+ struct drm_display_mode *mode)
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+{
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+ if (mode->clock > 165000)
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+ return MODE_CLOCK_HIGH;
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+ if (mode->clock < 20000)
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+ return MODE_CLOCK_HIGH;
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+
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+ if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
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+ return MODE_NO_DBLESCAN;
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+
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+ return MODE_OK;
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+}
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+
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+static bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
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+ struct drm_display_mode *mode,
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+ struct drm_display_mode *adjusted_mode)
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+{
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+ return true;
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+}
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+
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+static enum drm_connector_status
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+intel_hdmi_detect(struct drm_connector *connector)
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+{
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+ struct drm_device *dev = connector->dev;
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+ struct drm_i915_private *dev_priv = dev->dev_private;
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+ struct intel_output *intel_output = to_intel_output(connector);
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+ struct intel_hdmi_priv *hdmi_priv = intel_output->dev_priv;
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+ u32 temp, bit;
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+
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+ temp = I915_READ(PORT_HOTPLUG_EN);
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+
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+ I915_WRITE(PORT_HOTPLUG_EN,
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+ temp |
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+ HDMIB_HOTPLUG_INT_EN |
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+ HDMIC_HOTPLUG_INT_EN |
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+ HDMID_HOTPLUG_INT_EN);
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+
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+ POSTING_READ(PORT_HOTPLUG_EN);
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+
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+ switch (hdmi_priv->sdvox_reg) {
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+ case SDVOB:
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+ bit = HDMIB_HOTPLUG_INT_STATUS;
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+ break;
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+ case SDVOC:
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+ bit = HDMIC_HOTPLUG_INT_STATUS;
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+ break;
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+ default:
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+ return connector_status_unknown;
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+ }
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+
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+ if ((I915_READ(PORT_HOTPLUG_STAT) & bit) != 0)
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+ return connector_status_connected;
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+ else
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+ return connector_status_disconnected;
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+}
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+
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+static int intel_hdmi_get_modes(struct drm_connector *connector)
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+{
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+ struct intel_output *intel_output = to_intel_output(connector);
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+
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+ /* We should parse the EDID data and find out if it's an HDMI sink so
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+ * we can send audio to it.
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+ */
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+
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+ return intel_ddc_get_modes(intel_output);
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+}
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+
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+static void intel_hdmi_destroy(struct drm_connector *connector)
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+{
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+ struct intel_output *intel_output = to_intel_output(connector);
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+
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+ if (intel_output->i2c_bus)
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+ intel_i2c_destroy(intel_output->i2c_bus);
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+ drm_sysfs_connector_remove(connector);
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+ drm_connector_cleanup(connector);
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+ kfree(intel_output);
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+}
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+
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+static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
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+ .dpms = intel_hdmi_dpms,
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+ .mode_fixup = intel_hdmi_mode_fixup,
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+ .prepare = intel_encoder_prepare,
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+ .mode_set = intel_hdmi_mode_set,
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+ .commit = intel_encoder_commit,
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+};
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+
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+static const struct drm_connector_funcs intel_hdmi_connector_funcs = {
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+ .save = intel_hdmi_save,
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+ .restore = intel_hdmi_restore,
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+ .detect = intel_hdmi_detect,
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+ .fill_modes = drm_helper_probe_single_connector_modes,
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+ .destroy = intel_hdmi_destroy,
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+};
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+
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+static const struct drm_connector_helper_funcs intel_hdmi_connector_helper_funcs = {
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+ .get_modes = intel_hdmi_get_modes,
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+ .mode_valid = intel_hdmi_mode_valid,
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+ .best_encoder = intel_best_encoder,
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+};
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+
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+static void intel_hdmi_enc_destroy(struct drm_encoder *encoder)
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+{
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+ drm_encoder_cleanup(encoder);
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+}
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+
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+static const struct drm_encoder_funcs intel_hdmi_enc_funcs = {
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+ .destroy = intel_hdmi_enc_destroy,
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+};
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+
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+
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+void intel_hdmi_init(struct drm_device *dev, int sdvox_reg)
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+{
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+ struct drm_i915_private *dev_priv = dev->dev_private;
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+ struct drm_connector *connector;
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+ struct intel_output *intel_output;
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+ struct intel_hdmi_priv *hdmi_priv;
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+
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+ intel_output = kcalloc(sizeof(struct intel_output) +
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+ sizeof(struct intel_hdmi_priv), 1, GFP_KERNEL);
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+ if (!intel_output)
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+ return;
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+ hdmi_priv = (struct intel_hdmi_priv *)(intel_output + 1);
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+
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+ connector = &intel_output->base;
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+ drm_connector_init(dev, connector, &intel_hdmi_connector_funcs,
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+ DRM_MODE_CONNECTOR_DVID);
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+ drm_connector_helper_add(connector, &intel_hdmi_connector_helper_funcs);
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+
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+ intel_output->type = INTEL_OUTPUT_HDMI;
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+
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+ connector->interlace_allowed = 0;
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+ connector->doublescan_allowed = 0;
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+
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+ /* Set up the DDC bus. */
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+ if (sdvox_reg == SDVOB)
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+ intel_output->ddc_bus = intel_i2c_create(dev, GPIOE, "HDMIB");
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+ else
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+ intel_output->ddc_bus = intel_i2c_create(dev, GPIOD, "HDMIC");
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+
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+ if (!intel_output->ddc_bus)
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+ goto err_connector;
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+
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+ hdmi_priv->sdvox_reg = sdvox_reg;
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+ intel_output->dev_priv = hdmi_priv;
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+
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+ drm_encoder_init(dev, &intel_output->enc, &intel_hdmi_enc_funcs,
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+ DRM_MODE_ENCODER_TMDS);
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+ drm_encoder_helper_add(&intel_output->enc, &intel_hdmi_helper_funcs);
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+
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+ drm_mode_connector_attach_encoder(&intel_output->base,
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+ &intel_output->enc);
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+ drm_sysfs_connector_add(connector);
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+
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+ /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
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+ * 0xd. Failure to do so will result in spurious interrupts being
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+ * generated on the port when a cable is not attached.
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+ */
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+ if (IS_G4X(dev) && !IS_GM45(dev)) {
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+ u32 temp = I915_READ(PEG_BAND_GAP_DATA);
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+ I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
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+ }
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+
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+ return;
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+
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+err_connector:
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+ drm_connector_cleanup(connector);
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+ kfree(intel_output);
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+
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+ return;
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+}
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