drivers/gpu/drm/i915/intel_connector.c

   1 /*
   2  * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
   3  * Copyright (c) 2007, 2010 Intel Corporation
   4  *   Jesse Barnes <jesse.barnes@intel.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include <linux/slab.h>
  27 #include <linux/i2c.h>
  28 #include <drm/drm_atomic_helper.h>
  29 #include <drm/drm_edid.h>
  30 #include <drm/drmP.h>
  31 #include "intel_drv.h"
  32 #include "i915_drv.h"
  33
  34 int intel_connector_init(struct intel_connector *connector)
  35 {
  36         struct intel_digital_connector_state *conn_state;
  37
  38         /*
  39          * Allocate enough memory to hold intel_digital_connector_state,
  40          * This might be a few bytes too many, but for connectors that don't
  41          * need it we'll free the state and allocate a smaller one on the first
  42          * successful commit anyway.
  43          */
  44         conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
  45         if (!conn_state)
  46                 return -ENOMEM;
  47
  48         __drm_atomic_helper_connector_reset(&connector->base,
  49                                             &conn_state->base);
  50
  51         return 0;
  52 }
  53
  54 struct intel_connector *intel_connector_alloc(void)
  55 {
  56         struct intel_connector *connector;
  57
  58         connector = kzalloc(sizeof(*connector), GFP_KERNEL);
  59         if (!connector)
  60                 return NULL;
  61
  62         if (intel_connector_init(connector) < 0) {
  63                 kfree(connector);
  64                 return NULL;
  65         }
  66
  67         return connector;
  68 }
  69
  70 /*
  71  * Free the bits allocated by intel_connector_alloc.
  72  * This should only be used after intel_connector_alloc has returned
  73  * successfully, and before drm_connector_init returns successfully.
  74  * Otherwise the destroy callbacks for the connector and the state should
  75  * take care of proper cleanup/free (see intel_connector_destroy).
  76  */
  77 void intel_connector_free(struct intel_connector *connector)
  78 {
  79         kfree(to_intel_digital_connector_state(connector->base.state));
  80         kfree(connector);
  81 }
  82
  83 /*
  84  * Connector type independent destroy hook for drm_connector_funcs.
  85  */
  86 void intel_connector_destroy(struct drm_connector *connector)
  87 {
  88         struct intel_connector *intel_connector = to_intel_connector(connector);
  89
  90         kfree(intel_connector->detect_edid);
  91
  92         if (!IS_ERR_OR_NULL(intel_connector->edid))
  93                 kfree(intel_connector->edid);
  94
  95         intel_panel_fini(&intel_connector->panel);
  96
  97         drm_connector_cleanup(connector);
  98         kfree(connector);
  99 }
 100
 101 int intel_connector_register(struct drm_connector *connector)
 102 {
 103         struct intel_connector *intel_connector = to_intel_connector(connector);
 104         int ret;
 105
 106         ret = intel_backlight_device_register(intel_connector);
 107         if (ret)
 108                 goto err;
 109
 110         if (i915_inject_load_failure()) {
 111                 ret = -EFAULT;
 112                 goto err_backlight;
 113         }
 114
 115         return 0;
 116
 117 err_backlight:
 118         intel_backlight_device_unregister(intel_connector);
 119 err:
 120         return ret;
 121 }
 122
 123 void intel_connector_unregister(struct drm_connector *connector)
 124 {
 125         struct intel_connector *intel_connector = to_intel_connector(connector);
 126
 127         intel_backlight_device_unregister(intel_connector);
 128 }
 129
 130 void intel_connector_attach_encoder(struct intel_connector *connector,
 131                                     struct intel_encoder *encoder)
 132 {
 133         connector->encoder = encoder;
 134         drm_connector_attach_encoder(&connector->base, &encoder->base);
 135 }
 136
 137 /*
 138  * Simple connector->get_hw_state implementation for encoders that support only
 139  * one connector and no cloning and hence the encoder state determines the state
 140  * of the connector.
 141  */
 142 bool intel_connector_get_hw_state(struct intel_connector *connector)
 143 {
 144         enum pipe pipe = 0;
 145         struct intel_encoder *encoder = connector->encoder;
 146
 147         return encoder->get_hw_state(encoder, &pipe);
 148 }
 149
 150 enum pipe intel_connector_get_pipe(struct intel_connector *connector)
 151 {
 152         struct drm_device *dev = connector->base.dev;
 153
 154         WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
 155
 156         if (!connector->base.state->crtc)
 157                 return INVALID_PIPE;
 158
 159         return to_intel_crtc(connector->base.state->crtc)->pipe;
 160 }
 161
 162 /**
 163  * intel_connector_update_modes - update connector from edid
 164  * @connector: DRM connector device to use
 165  * @edid: previously read EDID information
 166  */
 167 int intel_connector_update_modes(struct drm_connector *connector,
 168                                 struct edid *edid)
 169 {
 170         int ret;
 171
 172         drm_connector_update_edid_property(connector, edid);
 173         ret = drm_add_edid_modes(connector, edid);
 174
 175         return ret;
 176 }
 177
 178 /**
 179  * intel_ddc_get_modes - get modelist from monitor
 180  * @connector: DRM connector device to use
 181  * @adapter: i2c adapter
 182  *
 183  * Fetch the EDID information from @connector using the DDC bus.
 184  */
 185 int intel_ddc_get_modes(struct drm_connector *connector,
 186                         struct i2c_adapter *adapter)
 187 {
 188         struct edid *edid;
 189         int ret;
 190
 191         edid = drm_get_edid(connector, adapter);
 192         if (!edid)
 193                 return 0;
 194
 195         ret = intel_connector_update_modes(connector, edid);
 196         kfree(edid);
 197
 198         return ret;
 199 }
 200
 201 static const struct drm_prop_enum_list force_audio_names[] = {
 202         { HDMI_AUDIO_OFF_DVI, "force-dvi" },
 203         { HDMI_AUDIO_OFF, "off" },
 204         { HDMI_AUDIO_AUTO, "auto" },
 205         { HDMI_AUDIO_ON, "on" },
 206 };
 207
 208 void
 209 intel_attach_force_audio_property(struct drm_connector *connector)
 210 {
 211         struct drm_device *dev = connector->dev;
 212         struct drm_i915_private *dev_priv = to_i915(dev);
 213         struct drm_property *prop;
 214
 215         prop = dev_priv->force_audio_property;
 216         if (prop == NULL) {
 217                 prop = drm_property_create_enum(dev, 0,
 218                                            "audio",
 219                                            force_audio_names,
 220                                            ARRAY_SIZE(force_audio_names));
 221                 if (prop == NULL)
 222                         return;
 223
 224                 dev_priv->force_audio_property = prop;
 225         }
 226         drm_object_attach_property(&connector->base, prop, 0);
 227 }
 228
 229 static const struct drm_prop_enum_list broadcast_rgb_names[] = {
 230         { INTEL_BROADCAST_RGB_AUTO, "Automatic" },
 231         { INTEL_BROADCAST_RGB_FULL, "Full" },
 232         { INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
 233 };
 234
 235 void
 236 intel_attach_broadcast_rgb_property(struct drm_connector *connector)
 237 {
 238         struct drm_device *dev = connector->dev;
 239         struct drm_i915_private *dev_priv = to_i915(dev);
 240         struct drm_property *prop;
 241
 242         prop = dev_priv->broadcast_rgb_property;
 243         if (prop == NULL) {
 244                 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
 245                                            "Broadcast RGB",
 246                                            broadcast_rgb_names,
 247                                            ARRAY_SIZE(broadcast_rgb_names));
 248                 if (prop == NULL)
 249                         return;
 250
 251                 dev_priv->broadcast_rgb_property = prop;
 252         }
 253
 254         drm_object_attach_property(&connector->base, prop, 0);
 255 }
 256
 257 void
 258 intel_attach_aspect_ratio_property(struct drm_connector *connector)
 259 {
 260         if (!drm_mode_create_aspect_ratio_property(connector->dev))
 261                 drm_object_attach_property(&connector->base,
 262                         connector->dev->mode_config.aspect_ratio_property,
 263                         DRM_MODE_PICTURE_ASPECT_NONE);
 264 }