drivers/gpu/drm/i915/display/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/i2c.h>
  27 #include <linux/slab.h>
  28
  29 #include <drm/drm_atomic_helper.h>
  30 #include <drm/drm_edid.h>
  31
  32 #include "display/intel_panel.h"
  33
  34 #include "i915_drv.h"
  35 #include "intel_connector.h"
  36 #include "intel_drv.h"
  37 #include "intel_hdcp.h"
  38
  39 int intel_connector_init(struct intel_connector *connector)
  40 {
  41         struct intel_digital_connector_state *conn_state;
  42
  43         /*
  44          * Allocate enough memory to hold intel_digital_connector_state,
  45          * This might be a few bytes too many, but for connectors that don't
  46          * need it we'll free the state and allocate a smaller one on the first
  47          * successful commit anyway.
  48          */
  49         conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
  50         if (!conn_state)
  51                 return -ENOMEM;
  52
  53         __drm_atomic_helper_connector_reset(&connector->base,
  54                                             &conn_state->base);
  55
  56         return 0;
  57 }
  58
  59 struct intel_connector *intel_connector_alloc(void)
  60 {
  61         struct intel_connector *connector;
  62
  63         connector = kzalloc(sizeof(*connector), GFP_KERNEL);
  64         if (!connector)
  65                 return NULL;
  66
  67         if (intel_connector_init(connector) < 0) {
  68                 kfree(connector);
  69                 return NULL;
  70         }
  71
  72         return connector;
  73 }
  74
  75 /*
  76  * Free the bits allocated by intel_connector_alloc.
  77  * This should only be used after intel_connector_alloc has returned
  78  * successfully, and before drm_connector_init returns successfully.
  79  * Otherwise the destroy callbacks for the connector and the state should
  80  * take care of proper cleanup/free (see intel_connector_destroy).
  81  */
  82 void intel_connector_free(struct intel_connector *connector)
  83 {
  84         kfree(to_intel_digital_connector_state(connector->base.state));
  85         kfree(connector);
  86 }
  87
  88 /*
  89  * Connector type independent destroy hook for drm_connector_funcs.
  90  */
  91 void intel_connector_destroy(struct drm_connector *connector)
  92 {
  93         struct intel_connector *intel_connector = to_intel_connector(connector);
  94
  95         kfree(intel_connector->detect_edid);
  96
  97         intel_hdcp_cleanup(intel_connector);
  98
  99         if (!IS_ERR_OR_NULL(intel_connector->edid))
 100                 kfree(intel_connector->edid);
 101
 102         intel_panel_fini(&intel_connector->panel);
 103
 104         drm_connector_cleanup(connector);
 105
 106         if (intel_connector->port)
 107                 drm_dp_mst_put_port_malloc(intel_connector->port);
 108
 109         kfree(connector);
 110 }
 111
 112 int intel_connector_register(struct drm_connector *connector)
 113 {
 114         struct intel_connector *intel_connector = to_intel_connector(connector);
 115         int ret;
 116
 117         ret = intel_backlight_device_register(intel_connector);
 118         if (ret)
 119                 goto err;
 120
 121         if (i915_inject_load_failure()) {
 122                 ret = -EFAULT;
 123                 goto err_backlight;
 124         }
 125
 126         return 0;
 127
 128 err_backlight:
 129         intel_backlight_device_unregister(intel_connector);
 130 err:
 131         return ret;
 132 }
 133
 134 void intel_connector_unregister(struct drm_connector *connector)
 135 {
 136         struct intel_connector *intel_connector = to_intel_connector(connector);
 137
 138         intel_backlight_device_unregister(intel_connector);
 139 }
 140
 141 void intel_connector_attach_encoder(struct intel_connector *connector,
 142                                     struct intel_encoder *encoder)
 143 {
 144         connector->encoder = encoder;
 145         drm_connector_attach_encoder(&connector->base, &encoder->base);
 146 }
 147
 148 /*
 149  * Simple connector->get_hw_state implementation for encoders that support only
 150  * one connector and no cloning and hence the encoder state determines the state
 151  * of the connector.
 152  */
 153 bool intel_connector_get_hw_state(struct intel_connector *connector)
 154 {
 155         enum pipe pipe = 0;
 156         struct intel_encoder *encoder = connector->encoder;
 157
 158         return encoder->get_hw_state(encoder, &pipe);
 159 }
 160
 161 enum pipe intel_connector_get_pipe(struct intel_connector *connector)
 162 {
 163         struct drm_device *dev = connector->base.dev;
 164
 165         WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
 166
 167         if (!connector->base.state->crtc)
 168                 return INVALID_PIPE;
 169
 170         return to_intel_crtc(connector->base.state->crtc)->pipe;
 171 }
 172
 173 /**
 174  * intel_connector_update_modes - update connector from edid
 175  * @connector: DRM connector device to use
 176  * @edid: previously read EDID information
 177  */
 178 int intel_connector_update_modes(struct drm_connector *connector,
 179                                 struct edid *edid)
 180 {
 181         int ret;
 182
 183         drm_connector_update_edid_property(connector, edid);
 184         ret = drm_add_edid_modes(connector, edid);
 185
 186         return ret;
 187 }
 188
 189 /**
 190  * intel_ddc_get_modes - get modelist from monitor
 191  * @connector: DRM connector device to use
 192  * @adapter: i2c adapter
 193  *
 194  * Fetch the EDID information from @connector using the DDC bus.
 195  */
 196 int intel_ddc_get_modes(struct drm_connector *connector,
 197                         struct i2c_adapter *adapter)
 198 {
 199         struct edid *edid;
 200         int ret;
 201
 202         edid = drm_get_edid(connector, adapter);
 203         if (!edid)
 204                 return 0;
 205
 206         ret = intel_connector_update_modes(connector, edid);
 207         kfree(edid);
 208
 209         return ret;
 210 }
 211
 212 static const struct drm_prop_enum_list force_audio_names[] = {
 213         { HDMI_AUDIO_OFF_DVI, "force-dvi" },
 214         { HDMI_AUDIO_OFF, "off" },
 215         { HDMI_AUDIO_AUTO, "auto" },
 216         { HDMI_AUDIO_ON, "on" },
 217 };
 218
 219 void
 220 intel_attach_force_audio_property(struct drm_connector *connector)
 221 {
 222         struct drm_device *dev = connector->dev;
 223         struct drm_i915_private *dev_priv = to_i915(dev);
 224         struct drm_property *prop;
 225
 226         prop = dev_priv->force_audio_property;
 227         if (prop == NULL) {
 228                 prop = drm_property_create_enum(dev, 0,
 229                                            "audio",
 230                                            force_audio_names,
 231                                            ARRAY_SIZE(force_audio_names));
 232                 if (prop == NULL)
 233                         return;
 234
 235                 dev_priv->force_audio_property = prop;
 236         }
 237         drm_object_attach_property(&connector->base, prop, 0);
 238 }
 239
 240 static const struct drm_prop_enum_list broadcast_rgb_names[] = {
 241         { INTEL_BROADCAST_RGB_AUTO, "Automatic" },
 242         { INTEL_BROADCAST_RGB_FULL, "Full" },
 243         { INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
 244 };
 245
 246 void
 247 intel_attach_broadcast_rgb_property(struct drm_connector *connector)
 248 {
 249         struct drm_device *dev = connector->dev;
 250         struct drm_i915_private *dev_priv = to_i915(dev);
 251         struct drm_property *prop;
 252
 253         prop = dev_priv->broadcast_rgb_property;
 254         if (prop == NULL) {
 255                 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
 256                                            "Broadcast RGB",
 257                                            broadcast_rgb_names,
 258                                            ARRAY_SIZE(broadcast_rgb_names));
 259                 if (prop == NULL)
 260                         return;
 261
 262                 dev_priv->broadcast_rgb_property = prop;
 263         }
 264
 265         drm_object_attach_property(&connector->base, prop, 0);
 266 }
 267
 268 void
 269 intel_attach_aspect_ratio_property(struct drm_connector *connector)
 270 {
 271         if (!drm_mode_create_aspect_ratio_property(connector->dev))
 272                 drm_object_attach_property(&connector->base,
 273                         connector->dev->mode_config.aspect_ratio_property,
 274                         DRM_MODE_PICTURE_ASPECT_NONE);
 275 }
 276
 277 void
 278 intel_attach_colorspace_property(struct drm_connector *connector)
 279 {
 280         if (!drm_mode_create_hdmi_colorspace_property(connector))
 281                 drm_object_attach_property(&connector->base,
 282                                            connector->colorspace_property, 0);
 283 }