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 "intel_drv.h"
  31 #include "i915_drv.h"
  32
  33 int intel_connector_init(struct intel_connector *connector)
  34 {
  35         struct intel_digital_connector_state *conn_state;
  36
  37         /*
  38          * Allocate enough memory to hold intel_digital_connector_state,
  39          * This might be a few bytes too many, but for connectors that don't
  40          * need it we'll free the state and allocate a smaller one on the first
  41          * successful commit anyway.
  42          */
  43         conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
  44         if (!conn_state)
  45                 return -ENOMEM;
  46
  47         __drm_atomic_helper_connector_reset(&connector->base,
  48                                             &conn_state->base);
  49
  50         return 0;
  51 }
  52
  53 struct intel_connector *intel_connector_alloc(void)
  54 {
  55         struct intel_connector *connector;
  56
  57         connector = kzalloc(sizeof(*connector), GFP_KERNEL);
  58         if (!connector)
  59                 return NULL;
  60
  61         if (intel_connector_init(connector) < 0) {
  62                 kfree(connector);
  63                 return NULL;
  64         }
  65
  66         return connector;
  67 }
  68
  69 /*
  70  * Free the bits allocated by intel_connector_alloc.
  71  * This should only be used after intel_connector_alloc has returned
  72  * successfully, and before drm_connector_init returns successfully.
  73  * Otherwise the destroy callbacks for the connector and the state should
  74  * take care of proper cleanup/free (see intel_connector_destroy).
  75  */
  76 void intel_connector_free(struct intel_connector *connector)
  77 {
  78         kfree(to_intel_digital_connector_state(connector->base.state));
  79         kfree(connector);
  80 }
  81
  82 /*
  83  * Connector type independent destroy hook for drm_connector_funcs.
  84  */
  85 void intel_connector_destroy(struct drm_connector *connector)
  86 {
  87         struct intel_connector *intel_connector = to_intel_connector(connector);
  88
  89         kfree(intel_connector->detect_edid);
  90
  91         if (!IS_ERR_OR_NULL(intel_connector->edid))
  92                 kfree(intel_connector->edid);
  93
  94         intel_panel_fini(&intel_connector->panel);
  95
  96         drm_connector_cleanup(connector);
  97
  98         if (intel_connector->port)
  99                 drm_dp_mst_put_port_malloc(intel_connector->port);
 100
 101         kfree(connector);
 102 }
 103
 104 int intel_connector_register(struct drm_connector *connector)
 105 {
 106         struct intel_connector *intel_connector = to_intel_connector(connector);
 107         int ret;
 108
 109         ret = intel_backlight_device_register(intel_connector);
 110         if (ret)
 111                 goto err;
 112
 113         if (i915_inject_load_failure()) {
 114                 ret = -EFAULT;
 115                 goto err_backlight;
 116         }
 117
 118         return 0;
 119
 120 err_backlight:
 121         intel_backlight_device_unregister(intel_connector);
 122 err:
 123         return ret;
 124 }
 125
 126 void intel_connector_unregister(struct drm_connector *connector)
 127 {
 128         struct intel_connector *intel_connector = to_intel_connector(connector);
 129
 130         intel_backlight_device_unregister(intel_connector);
 131 }
 132
 133 void intel_connector_attach_encoder(struct intel_connector *connector,
 134                                     struct intel_encoder *encoder)
 135 {
 136         connector->encoder = encoder;
 137         drm_connector_attach_encoder(&connector->base, &encoder->base);
 138 }
 139
 140 /*
 141  * Simple connector->get_hw_state implementation for encoders that support only
 142  * one connector and no cloning and hence the encoder state determines the state
 143  * of the connector.
 144  */
 145 bool intel_connector_get_hw_state(struct intel_connector *connector)
 146 {
 147         enum pipe pipe = 0;
 148         struct intel_encoder *encoder = connector->encoder;
 149
 150         return encoder->get_hw_state(encoder, &pipe);
 151 }
 152
 153 enum pipe intel_connector_get_pipe(struct intel_connector *connector)
 154 {
 155         struct drm_device *dev = connector->base.dev;
 156
 157         WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
 158
 159         if (!connector->base.state->crtc)
 160                 return INVALID_PIPE;
 161
 162         return to_intel_crtc(connector->base.state->crtc)->pipe;
 163 }
 164
 165 /**
 166  * intel_connector_update_modes - update connector from edid
 167  * @connector: DRM connector device to use
 168  * @edid: previously read EDID information
 169  */
 170 int intel_connector_update_modes(struct drm_connector *connector,
 171                                 struct edid *edid)
 172 {
 173         int ret;
 174
 175         drm_connector_update_edid_property(connector, edid);
 176         ret = drm_add_edid_modes(connector, edid);
 177
 178         return ret;
 179 }
 180
 181 /**
 182  * intel_ddc_get_modes - get modelist from monitor
 183  * @connector: DRM connector device to use
 184  * @adapter: i2c adapter
 185  *
 186  * Fetch the EDID information from @connector using the DDC bus.
 187  */
 188 int intel_ddc_get_modes(struct drm_connector *connector,
 189                         struct i2c_adapter *adapter)
 190 {
 191         struct edid *edid;
 192         int ret;
 193
 194         edid = drm_get_edid(connector, adapter);
 195         if (!edid)
 196                 return 0;
 197
 198         ret = intel_connector_update_modes(connector, edid);
 199         kfree(edid);
 200
 201         return ret;
 202 }
 203
 204 static const struct drm_prop_enum_list force_audio_names[] = {
 205         { HDMI_AUDIO_OFF_DVI, "force-dvi" },
 206         { HDMI_AUDIO_OFF, "off" },
 207         { HDMI_AUDIO_AUTO, "auto" },
 208         { HDMI_AUDIO_ON, "on" },
 209 };
 210
 211 void
 212 intel_attach_force_audio_property(struct drm_connector *connector)
 213 {
 214         struct drm_device *dev = connector->dev;
 215         struct drm_i915_private *dev_priv = to_i915(dev);
 216         struct drm_property *prop;
 217
 218         prop = dev_priv->force_audio_property;
 219         if (prop == NULL) {
 220                 prop = drm_property_create_enum(dev, 0,
 221                                            "audio",
 222                                            force_audio_names,
 223                                            ARRAY_SIZE(force_audio_names));
 224                 if (prop == NULL)
 225                         return;
 226
 227                 dev_priv->force_audio_property = prop;
 228         }
 229         drm_object_attach_property(&connector->base, prop, 0);
 230 }
 231
 232 static const struct drm_prop_enum_list broadcast_rgb_names[] = {
 233         { INTEL_BROADCAST_RGB_AUTO, "Automatic" },
 234         { INTEL_BROADCAST_RGB_FULL, "Full" },
 235         { INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
 236 };
 237
 238 void
 239 intel_attach_broadcast_rgb_property(struct drm_connector *connector)
 240 {
 241         struct drm_device *dev = connector->dev;
 242         struct drm_i915_private *dev_priv = to_i915(dev);
 243         struct drm_property *prop;
 244
 245         prop = dev_priv->broadcast_rgb_property;
 246         if (prop == NULL) {
 247                 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
 248                                            "Broadcast RGB",
 249                                            broadcast_rgb_names,
 250                                            ARRAY_SIZE(broadcast_rgb_names));
 251                 if (prop == NULL)
 252                         return;
 253
 254                 dev_priv->broadcast_rgb_property = prop;
 255         }
 256
 257         drm_object_attach_property(&connector->base, prop, 0);
 258 }
 259
 260 void
 261 intel_attach_aspect_ratio_property(struct drm_connector *connector)
 262 {
 263         if (!drm_mode_create_aspect_ratio_property(connector->dev))
 264                 drm_object_attach_property(&connector->base,
 265                         connector->dev->mode_config.aspect_ratio_property,
 266                         DRM_MODE_PICTURE_ASPECT_NONE);
 267 }