drivers/gpu/drm/i915/intel_connector.c

   1 /*
   2  * Copyright (c) 2007 Dave Airlie <[email protected]>
   3  * Copyright (c) 2007, 2010 Intel Corporation
   4  *   Jesse Barnes <[email protected]>
   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 "i915_drv.h"
  33 #include "intel_connector.h"
  34 #include "intel_drv.h"
  35 #include "intel_hdcp.h"
  36 #include "intel_panel.h"
  37
  38 int intel_connector_init(struct intel_connector *connector)
  39 {
  40         struct intel_digital_connector_state *conn_state;
  41
  42         /*
  43          * Allocate enough memory to hold intel_digital_connector_state,
  44          * This might be a few bytes too many, but for connectors that don't
  45          * need it we'll free the state and allocate a smaller one on the first
  46          * successful commit anyway.
  47          */
  48         conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
  49         if (!conn_state)
  50                 return -ENOMEM;
  51
  52         __drm_atomic_helper_connector_reset(&connector->base,
  53                                             &conn_state->base);
  54
  55         return 0;
  56 }
  57
  58 struct intel_connector *intel_connector_alloc(void)
  59 {
  60         struct intel_connector *connector;
  61
  62         connector = kzalloc(sizeof(*connector), GFP_KERNEL);
  63         if (!connector)
  64                 return NULL;
  65
  66         if (intel_connector_init(connector) < 0) {
  67                 kfree(connector);
  68                 return NULL;
  69         }
  70
  71         return connector;
  72 }
  73
  74 /*
  75  * Free the bits allocated by intel_connector_alloc.
  76  * This should only be used after intel_connector_alloc has returned
  77  * successfully, and before drm_connector_init returns successfully.
  78  * Otherwise the destroy callbacks for the connector and the state should
  79  * take care of proper cleanup/free (see intel_connector_destroy).
  80  */
  81 void intel_connector_free(struct intel_connector *connector)
  82 {
  83         kfree(to_intel_digital_connector_state(connector->base.state));
  84         kfree(connector);
  85 }
  86
  87 /*
  88  * Connector type independent destroy hook for drm_connector_funcs.
  89  */
  90 void intel_connector_destroy(struct drm_connector *connector)
  91 {
  92         struct intel_connector *intel_connector = to_intel_connector(connector);
  93
  94         kfree(intel_connector->detect_edid);
  95
  96         intel_hdcp_cleanup(intel_connector);
  97
  98         if (!IS_ERR_OR_NULL(intel_connector->edid))
  99                 kfree(intel_connector->edid);
 100
 101         intel_panel_fini(&intel_connector->panel);
 102
 103         drm_connector_cleanup(connector);
 104
 105         if (intel_connector->port)
 106                 drm_dp_mst_put_port_malloc(intel_connector->port);
 107
 108         kfree(connector);
 109 }
 110
 111 int intel_connector_register(struct drm_connector *connector)
 112 {
 113         struct intel_connector *intel_connector = to_intel_connector(connector);
 114         int ret;
 115
 116         ret = intel_backlight_device_register(intel_connector);
 117         if (ret)
 118                 goto err;
 119
 120         if (i915_inject_load_failure()) {
 121                 ret = -EFAULT;
 122                 goto err_backlight;
 123         }
 124
 125         return 0;
 126
 127 err_backlight:
 128         intel_backlight_device_unregister(intel_connector);
 129 err:
 130         return ret;
 131 }
 132
 133 void intel_connector_unregister(struct drm_connector *connector)
 134 {
 135         struct intel_connector *intel_connector = to_intel_connector(connector);
 136
 137         intel_backlight_device_unregister(intel_connector);
 138 }
 139
 140 void intel_connector_attach_encoder(struct intel_connector *connector,
 141                                     struct intel_encoder *encoder)
 142 {
 143         connector->encoder = encoder;
 144         drm_connector_attach_encoder(&connector->base, &encoder->base);
 145 }
 146
 147 /*
 148  * Simple connector->get_hw_state implementation for encoders that support only
 149  * one connector and no cloning and hence the encoder state determines the state
 150  * of the connector.
 151  */
 152 bool intel_connector_get_hw_state(struct intel_connector *connector)
 153 {
 154         enum pipe pipe = 0;
 155         struct intel_encoder *encoder = connector->encoder;
 156
 157         return encoder->get_hw_state(encoder, &pipe);
 158 }
 159
 160 enum pipe intel_connector_get_pipe(struct intel_connector *connector)
 161 {
 162         struct drm_device *dev = connector->base.dev;
 163
 164         WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
 165
 166         if (!connector->base.state->crtc)
 167                 return INVALID_PIPE;
 168
 169         return to_intel_crtc(connector->base.state->crtc)->pipe;
 170 }
 171
 172 /**
 173  * intel_connector_update_modes - update connector from edid
 174  * @connector: DRM connector device to use
 175  * @edid: previously read EDID information
 176  */
 177 int intel_connector_update_modes(struct drm_connector *connector,
 178                                 struct edid *edid)
 179 {
 180         int ret;
 181
 182         drm_connector_update_edid_property(connector, edid);
 183         ret = drm_add_edid_modes(connector, edid);
 184
 185         return ret;
 186 }
 187
 188 /**
 189  * intel_ddc_get_modes - get modelist from monitor
 190  * @connector: DRM connector device to use
 191  * @adapter: i2c adapter
 192  *
 193  * Fetch the EDID information from @connector using the DDC bus.
 194  */
 195 int intel_ddc_get_modes(struct drm_connector *connector,
 196                         struct i2c_adapter *adapter)
 197 {
 198         struct edid *edid;
 199         int ret;
 200
 201         edid = drm_get_edid(connector, adapter);
 202         if (!edid)
 203                 return 0;
 204
 205         ret = intel_connector_update_modes(connector, edid);
 206         kfree(edid);
 207
 208         return ret;
 209 }
 210
 211 static const struct drm_prop_enum_list force_audio_names[] = {
 212         { HDMI_AUDIO_OFF_DVI, "force-dvi" },
 213         { HDMI_AUDIO_OFF, "off" },
 214         { HDMI_AUDIO_AUTO, "auto" },
 215         { HDMI_AUDIO_ON, "on" },
 216 };
 217
 218 void
 219 intel_attach_force_audio_property(struct drm_connector *connector)
 220 {
 221         struct drm_device *dev = connector->dev;
 222         struct drm_i915_private *dev_priv = to_i915(dev);
 223         struct drm_property *prop;
 224
 225         prop = dev_priv->force_audio_property;
 226         if (prop == NULL) {
 227                 prop = drm_property_create_enum(dev, 0,
 228                                            "audio",
 229                                            force_audio_names,
 230                                            ARRAY_SIZE(force_audio_names));
 231                 if (prop == NULL)
 232                         return;
 233
 234                 dev_priv->force_audio_property = prop;
 235         }
 236         drm_object_attach_property(&connector->base, prop, 0);
 237 }
 238
 239 static const struct drm_prop_enum_list broadcast_rgb_names[] = {
 240         { INTEL_BROADCAST_RGB_AUTO, "Automatic" },
 241         { INTEL_BROADCAST_RGB_FULL, "Full" },
 242         { INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
 243 };
 244
 245 void
 246 intel_attach_broadcast_rgb_property(struct drm_connector *connector)
 247 {
 248         struct drm_device *dev = connector->dev;
 249         struct drm_i915_private *dev_priv = to_i915(dev);
 250         struct drm_property *prop;
 251
 252         prop = dev_priv->broadcast_rgb_property;
 253         if (prop == NULL) {
 254                 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
 255                                            "Broadcast RGB",
 256                                            broadcast_rgb_names,
 257                                            ARRAY_SIZE(broadcast_rgb_names));
 258                 if (prop == NULL)
 259                         return;
 260
 261                 dev_priv->broadcast_rgb_property = prop;
 262         }
 263
 264         drm_object_attach_property(&connector->base, prop, 0);
 265 }
 266
 267 void
 268 intel_attach_aspect_ratio_property(struct drm_connector *connector)
 269 {
 270         if (!drm_mode_create_aspect_ratio_property(connector->dev))
 271                 drm_object_attach_property(&connector->base,
 272                         connector->dev->mode_config.aspect_ratio_property,
 273                         DRM_MODE_PICTURE_ASPECT_NONE);
 274 }
 275
 276 void
 277 intel_attach_colorspace_property(struct drm_connector *connector)
 278 {
 279         if (!drm_mode_create_colorspace_property(connector))
 280                 drm_object_attach_property(&connector->base,
 281                                            connector->colorspace_property, 0);
 282 }