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 "i915_drv.h"
  33 #include "intel_backlight.h"
  34 #include "intel_connector.h"
  35 #include "intel_display_debugfs.h"
  36 #include "intel_display_types.h"
  37 #include "intel_hdcp.h"
  38 #include "intel_panel.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         intel_panel_init_alloc(connector);
  58
  59         return 0;
  60 }
  61
  62 struct intel_connector *intel_connector_alloc(void)
  63 {
  64         struct intel_connector *connector;
  65
  66         connector = kzalloc(sizeof(*connector), GFP_KERNEL);
  67         if (!connector)
  68                 return NULL;
  69
  70         if (intel_connector_init(connector) < 0) {
  71                 kfree(connector);
  72                 return NULL;
  73         }
  74
  75         return connector;
  76 }
  77
  78 /*
  79  * Free the bits allocated by intel_connector_alloc.
  80  * This should only be used after intel_connector_alloc has returned
  81  * successfully, and before drm_connector_init returns successfully.
  82  * Otherwise the destroy callbacks for the connector and the state should
  83  * take care of proper cleanup/free (see intel_connector_destroy).
  84  */
  85 void intel_connector_free(struct intel_connector *connector)
  86 {
  87         kfree(to_intel_digital_connector_state(connector->base.state));
  88         kfree(connector);
  89 }
  90
  91 /*
  92  * Connector type independent destroy hook for drm_connector_funcs.
  93  */
  94 void intel_connector_destroy(struct drm_connector *connector)
  95 {
  96         struct intel_connector *intel_connector = to_intel_connector(connector);
  97
  98         drm_edid_free(intel_connector->detect_edid);
  99
 100         intel_hdcp_cleanup(intel_connector);
 101
 102         intel_panel_fini(intel_connector);
 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_probe_failure(to_i915(connector->dev))) {
 122                 ret = -EFAULT;
 123                 goto err_backlight;
 124         }
 125
 126         intel_connector_debugfs_add(intel_connector);
 127
 128         return 0;
 129
 130 err_backlight:
 131         intel_backlight_device_unregister(intel_connector);
 132 err:
 133         return ret;
 134 }
 135
 136 void intel_connector_unregister(struct drm_connector *connector)
 137 {
 138         struct intel_connector *intel_connector = to_intel_connector(connector);
 139
 140         intel_backlight_device_unregister(intel_connector);
 141 }
 142
 143 void intel_connector_attach_encoder(struct intel_connector *connector,
 144                                     struct intel_encoder *encoder)
 145 {
 146         connector->encoder = encoder;
 147         drm_connector_attach_encoder(&connector->base, &encoder->base);
 148 }
 149
 150 /*
 151  * Simple connector->get_hw_state implementation for encoders that support only
 152  * one connector and no cloning and hence the encoder state determines the state
 153  * of the connector.
 154  */
 155 bool intel_connector_get_hw_state(struct intel_connector *connector)
 156 {
 157         enum pipe pipe = 0;
 158         struct intel_encoder *encoder = intel_attached_encoder(connector);
 159
 160         return encoder->get_hw_state(encoder, &pipe);
 161 }
 162
 163 enum pipe intel_connector_get_pipe(struct intel_connector *connector)
 164 {
 165         struct drm_device *dev = connector->base.dev;
 166
 167         drm_WARN_ON(dev,
 168                     !drm_modeset_is_locked(&dev->mode_config.connection_mutex));
 169
 170         if (!connector->base.state->crtc)
 171                 return INVALID_PIPE;
 172
 173         return to_intel_crtc(connector->base.state->crtc)->pipe;
 174 }
 175
 176 /**
 177  * intel_connector_update_modes - update connector from edid
 178  * @connector: DRM connector device to use
 179  * @drm_edid: previously read EDID information
 180  */
 181 int intel_connector_update_modes(struct drm_connector *connector,
 182                                  const struct drm_edid *drm_edid)
 183 {
 184         int ret;
 185
 186         drm_edid_connector_update(connector, drm_edid);
 187         ret = drm_edid_connector_add_modes(connector);
 188
 189         return ret;
 190 }
 191
 192 /**
 193  * intel_ddc_get_modes - get modelist from monitor
 194  * @connector: DRM connector device to use
 195  * @adapter: i2c adapter
 196  *
 197  * Fetch the EDID information from @connector using the DDC bus.
 198  */
 199 int intel_ddc_get_modes(struct drm_connector *connector,
 200                         struct i2c_adapter *adapter)
 201 {
 202         const struct drm_edid *drm_edid;
 203         int ret;
 204
 205         drm_edid = drm_edid_read_ddc(connector, adapter);
 206         if (!drm_edid)
 207                 return 0;
 208
 209         ret = intel_connector_update_modes(connector, drm_edid);
 210         drm_edid_free(drm_edid);
 211
 212         return ret;
 213 }
 214
 215 static const struct drm_prop_enum_list force_audio_names[] = {
 216         { HDMI_AUDIO_OFF_DVI, "force-dvi" },
 217         { HDMI_AUDIO_OFF, "off" },
 218         { HDMI_AUDIO_AUTO, "auto" },
 219         { HDMI_AUDIO_ON, "on" },
 220 };
 221
 222 void
 223 intel_attach_force_audio_property(struct drm_connector *connector)
 224 {
 225         struct drm_device *dev = connector->dev;
 226         struct drm_i915_private *dev_priv = to_i915(dev);
 227         struct drm_property *prop;
 228
 229         prop = dev_priv->display.properties.force_audio;
 230         if (prop == NULL) {
 231                 prop = drm_property_create_enum(dev, 0,
 232                                            "audio",
 233                                            force_audio_names,
 234                                            ARRAY_SIZE(force_audio_names));
 235                 if (prop == NULL)
 236                         return;
 237
 238                 dev_priv->display.properties.force_audio = prop;
 239         }
 240         drm_object_attach_property(&connector->base, prop, 0);
 241 }
 242
 243 static const struct drm_prop_enum_list broadcast_rgb_names[] = {
 244         { INTEL_BROADCAST_RGB_AUTO, "Automatic" },
 245         { INTEL_BROADCAST_RGB_FULL, "Full" },
 246         { INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
 247 };
 248
 249 void
 250 intel_attach_broadcast_rgb_property(struct drm_connector *connector)
 251 {
 252         struct drm_device *dev = connector->dev;
 253         struct drm_i915_private *dev_priv = to_i915(dev);
 254         struct drm_property *prop;
 255
 256         prop = dev_priv->display.properties.broadcast_rgb;
 257         if (prop == NULL) {
 258                 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
 259                                            "Broadcast RGB",
 260                                            broadcast_rgb_names,
 261                                            ARRAY_SIZE(broadcast_rgb_names));
 262                 if (prop == NULL)
 263                         return;
 264
 265                 dev_priv->display.properties.broadcast_rgb = prop;
 266         }
 267
 268         drm_object_attach_property(&connector->base, prop, 0);
 269 }
 270
 271 void
 272 intel_attach_aspect_ratio_property(struct drm_connector *connector)
 273 {
 274         if (!drm_mode_create_aspect_ratio_property(connector->dev))
 275                 drm_object_attach_property(&connector->base,
 276                         connector->dev->mode_config.aspect_ratio_property,
 277                         DRM_MODE_PICTURE_ASPECT_NONE);
 278 }
 279
 280 void
 281 intel_attach_hdmi_colorspace_property(struct drm_connector *connector)
 282 {
 283         if (!drm_mode_create_hdmi_colorspace_property(connector, 0))
 284                 drm_connector_attach_colorspace_property(connector);
 285 }
 286
 287 void
 288 intel_attach_dp_colorspace_property(struct drm_connector *connector)
 289 {
 290         if (!drm_mode_create_dp_colorspace_property(connector, 0))
 291                 drm_connector_attach_colorspace_property(connector);
 292 }
 293
 294 void
 295 intel_attach_scaling_mode_property(struct drm_connector *connector)
 296 {
 297         struct drm_i915_private *i915 = to_i915(connector->dev);
 298         u32 scaling_modes;
 299
 300         scaling_modes = BIT(DRM_MODE_SCALE_ASPECT) |
 301                 BIT(DRM_MODE_SCALE_FULLSCREEN);
 302
 303         /* On GMCH platforms borders are only possible on the LVDS port */
 304         if (!HAS_GMCH(i915) || connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
 305                 scaling_modes |= BIT(DRM_MODE_SCALE_CENTER);
 306
 307         drm_connector_attach_scaling_mode_property(connector, scaling_modes);
 308
 309         connector->state->scaling_mode = DRM_MODE_SCALE_ASPECT;
 310 }