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_display_debugfs.h"
  37 #include "intel_display_types.h"
  38 #include "intel_hdcp.h"
  39
  40 int intel_connector_init(struct intel_connector *connector)
  41 {
  42         struct intel_digital_connector_state *conn_state;
  43
  44         /*
  45          * Allocate enough memory to hold intel_digital_connector_state,
  46          * This might be a few bytes too many, but for connectors that don't
  47          * need it we'll free the state and allocate a smaller one on the first
  48          * successful commit anyway.
  49          */
  50         conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
  51         if (!conn_state)
  52                 return -ENOMEM;
  53
  54         __drm_atomic_helper_connector_reset(&connector->base,
  55                                             &conn_state->base);
  56
  57         return 0;
  58 }
  59
  60 struct intel_connector *intel_connector_alloc(void)
  61 {
  62         struct intel_connector *connector;
  63
  64         connector = kzalloc(sizeof(*connector), GFP_KERNEL);
  65         if (!connector)
  66                 return NULL;
  67
  68         if (intel_connector_init(connector) < 0) {
  69                 kfree(connector);
  70                 return NULL;
  71         }
  72
  73         return connector;
  74 }
  75
  76 /*
  77  * Free the bits allocated by intel_connector_alloc.
  78  * This should only be used after intel_connector_alloc has returned
  79  * successfully, and before drm_connector_init returns successfully.
  80  * Otherwise the destroy callbacks for the connector and the state should
  81  * take care of proper cleanup/free (see intel_connector_destroy).
  82  */
  83 void intel_connector_free(struct intel_connector *connector)
  84 {
  85         kfree(to_intel_digital_connector_state(connector->base.state));
  86         kfree(connector);
  87 }
  88
  89 /*
  90  * Connector type independent destroy hook for drm_connector_funcs.
  91  */
  92 void intel_connector_destroy(struct drm_connector *connector)
  93 {
  94         struct intel_connector *intel_connector = to_intel_connector(connector);
  95
  96         kfree(intel_connector->detect_edid);
  97
  98         intel_hdcp_cleanup(intel_connector);
  99
 100         if (!IS_ERR_OR_NULL(intel_connector->edid))
 101                 kfree(intel_connector->edid);
 102
 103         intel_panel_fini(&intel_connector->panel);
 104
 105         drm_connector_cleanup(connector);
 106
 107         if (intel_connector->port)
 108                 drm_dp_mst_put_port_malloc(intel_connector->port);
 109
 110         kfree(connector);
 111 }
 112
 113 int intel_connector_register(struct drm_connector *connector)
 114 {
 115         struct intel_connector *intel_connector = to_intel_connector(connector);
 116         int ret;
 117
 118         ret = intel_backlight_device_register(intel_connector);
 119         if (ret)
 120                 goto err;
 121
 122         if (i915_inject_probe_failure(to_i915(connector->dev))) {
 123                 ret = -EFAULT;
 124                 goto err_backlight;
 125         }
 126
 127         intel_connector_debugfs_add(connector);
 128
 129         return 0;
 130
 131 err_backlight:
 132         intel_backlight_device_unregister(intel_connector);
 133 err:
 134         return ret;
 135 }
 136
 137 void intel_connector_unregister(struct drm_connector *connector)
 138 {
 139         struct intel_connector *intel_connector = to_intel_connector(connector);
 140
 141         intel_backlight_device_unregister(intel_connector);
 142 }
 143
 144 void intel_connector_attach_encoder(struct intel_connector *connector,
 145                                     struct intel_encoder *encoder)
 146 {
 147         connector->encoder = encoder;
 148         drm_connector_attach_encoder(&connector->base, &encoder->base);
 149 }
 150
 151 /*
 152  * Simple connector->get_hw_state implementation for encoders that support only
 153  * one connector and no cloning and hence the encoder state determines the state
 154  * of the connector.
 155  */
 156 bool intel_connector_get_hw_state(struct intel_connector *connector)
 157 {
 158         enum pipe pipe = 0;
 159         struct intel_encoder *encoder = intel_attached_encoder(connector);
 160
 161         return encoder->get_hw_state(encoder, &pipe);
 162 }
 163
 164 enum pipe intel_connector_get_pipe(struct intel_connector *connector)
 165 {
 166         struct drm_device *dev = connector->base.dev;
 167
 168         drm_WARN_ON(dev,
 169                     !drm_modeset_is_locked(&dev->mode_config.connection_mutex));
 170
 171         if (!connector->base.state->crtc)
 172                 return INVALID_PIPE;
 173
 174         return to_intel_crtc(connector->base.state->crtc)->pipe;
 175 }
 176
 177 /**
 178  * intel_connector_update_modes - update connector from edid
 179  * @connector: DRM connector device to use
 180  * @edid: previously read EDID information
 181  */
 182 int intel_connector_update_modes(struct drm_connector *connector,
 183                                 struct edid *edid)
 184 {
 185         int ret;
 186
 187         drm_connector_update_edid_property(connector, edid);
 188         ret = drm_add_edid_modes(connector, edid);
 189
 190         return ret;
 191 }
 192
 193 /**
 194  * intel_ddc_get_modes - get modelist from monitor
 195  * @connector: DRM connector device to use
 196  * @adapter: i2c adapter
 197  *
 198  * Fetch the EDID information from @connector using the DDC bus.
 199  */
 200 int intel_ddc_get_modes(struct drm_connector *connector,
 201                         struct i2c_adapter *adapter)
 202 {
 203         struct edid *edid;
 204         int ret;
 205
 206         edid = drm_get_edid(connector, adapter);
 207         if (!edid)
 208                 return 0;
 209
 210         ret = intel_connector_update_modes(connector, edid);
 211         kfree(edid);
 212
 213         return ret;
 214 }
 215
 216 static const struct drm_prop_enum_list force_audio_names[] = {
 217         { HDMI_AUDIO_OFF_DVI, "force-dvi" },
 218         { HDMI_AUDIO_OFF, "off" },
 219         { HDMI_AUDIO_AUTO, "auto" },
 220         { HDMI_AUDIO_ON, "on" },
 221 };
 222
 223 void
 224 intel_attach_force_audio_property(struct drm_connector *connector)
 225 {
 226         struct drm_device *dev = connector->dev;
 227         struct drm_i915_private *dev_priv = to_i915(dev);
 228         struct drm_property *prop;
 229
 230         prop = dev_priv->force_audio_property;
 231         if (prop == NULL) {
 232                 prop = drm_property_create_enum(dev, 0,
 233                                            "audio",
 234                                            force_audio_names,
 235                                            ARRAY_SIZE(force_audio_names));
 236                 if (prop == NULL)
 237                         return;
 238
 239                 dev_priv->force_audio_property = prop;
 240         }
 241         drm_object_attach_property(&connector->base, prop, 0);
 242 }
 243
 244 static const struct drm_prop_enum_list broadcast_rgb_names[] = {
 245         { INTEL_BROADCAST_RGB_AUTO, "Automatic" },
 246         { INTEL_BROADCAST_RGB_FULL, "Full" },
 247         { INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
 248 };
 249
 250 void
 251 intel_attach_broadcast_rgb_property(struct drm_connector *connector)
 252 {
 253         struct drm_device *dev = connector->dev;
 254         struct drm_i915_private *dev_priv = to_i915(dev);
 255         struct drm_property *prop;
 256
 257         prop = dev_priv->broadcast_rgb_property;
 258         if (prop == NULL) {
 259                 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
 260                                            "Broadcast RGB",
 261                                            broadcast_rgb_names,
 262                                            ARRAY_SIZE(broadcast_rgb_names));
 263                 if (prop == NULL)
 264                         return;
 265
 266                 dev_priv->broadcast_rgb_property = prop;
 267         }
 268
 269         drm_object_attach_property(&connector->base, prop, 0);
 270 }
 271
 272 void
 273 intel_attach_aspect_ratio_property(struct drm_connector *connector)
 274 {
 275         if (!drm_mode_create_aspect_ratio_property(connector->dev))
 276                 drm_object_attach_property(&connector->base,
 277                         connector->dev->mode_config.aspect_ratio_property,
 278                         DRM_MODE_PICTURE_ASPECT_NONE);
 279 }
 280
 281 void
 282 intel_attach_hdmi_colorspace_property(struct drm_connector *connector)
 283 {
 284         if (!drm_mode_create_hdmi_colorspace_property(connector))
 285                 drm_connector_attach_colorspace_property(connector);
 286 }
 287
 288 void
 289 intel_attach_dp_colorspace_property(struct drm_connector *connector)
 290 {
 291         if (!drm_mode_create_dp_colorspace_property(connector))
 292                 drm_connector_attach_colorspace_property(connector);
 293 }