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0001 /*
0002  * Copyright (c) 2016 Intel Corporation
0003  *
0004  * Permission to use, copy, modify, distribute, and sell this software and its
0005  * documentation for any purpose is hereby granted without fee, provided that
0006  * the above copyright notice appear in all copies and that both that copyright
0007  * notice and this permission notice appear in supporting documentation, and
0008  * that the name of the copyright holders not be used in advertising or
0009  * publicity pertaining to distribution of the software without specific,
0010  * written prior permission.  The copyright holders make no representations
0011  * about the suitability of this software for any purpose.  It is provided "as
0012  * is" without express or implied warranty.
0013  *
0014  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
0015  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
0016  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
0017  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
0018  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
0019  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
0020  * OF THIS SOFTWARE.
0021  */
0022 
0023 #include <linux/uaccess.h>
0024 
0025 #include <drm/drm_drv.h>
0026 #include <drm/drm_encoder.h>
0027 #include <drm/drm_file.h>
0028 #include <drm/drm_framebuffer.h>
0029 #include <drm/drm_managed.h>
0030 #include <drm/drm_mode_config.h>
0031 #include <drm/drm_print.h>
0032 #include <linux/dma-resv.h>
0033 
0034 #include "drm_crtc_internal.h"
0035 #include "drm_internal.h"
0036 
0037 int drm_modeset_register_all(struct drm_device *dev)
0038 {
0039     int ret;
0040 
0041     ret = drm_plane_register_all(dev);
0042     if (ret)
0043         goto err_plane;
0044 
0045     ret = drm_crtc_register_all(dev);
0046     if  (ret)
0047         goto err_crtc;
0048 
0049     ret = drm_encoder_register_all(dev);
0050     if (ret)
0051         goto err_encoder;
0052 
0053     ret = drm_connector_register_all(dev);
0054     if (ret)
0055         goto err_connector;
0056 
0057     return 0;
0058 
0059 err_connector:
0060     drm_encoder_unregister_all(dev);
0061 err_encoder:
0062     drm_crtc_unregister_all(dev);
0063 err_crtc:
0064     drm_plane_unregister_all(dev);
0065 err_plane:
0066     return ret;
0067 }
0068 
0069 void drm_modeset_unregister_all(struct drm_device *dev)
0070 {
0071     drm_connector_unregister_all(dev);
0072     drm_encoder_unregister_all(dev);
0073     drm_crtc_unregister_all(dev);
0074     drm_plane_unregister_all(dev);
0075 }
0076 
0077 /**
0078  * drm_mode_getresources - get graphics configuration
0079  * @dev: drm device for the ioctl
0080  * @data: data pointer for the ioctl
0081  * @file_priv: drm file for the ioctl call
0082  *
0083  * Construct a set of configuration description structures and return
0084  * them to the user, including CRTC, connector and framebuffer configuration.
0085  *
0086  * Called by the user via ioctl.
0087  *
0088  * Returns:
0089  * Zero on success, negative errno on failure.
0090  */
0091 int drm_mode_getresources(struct drm_device *dev, void *data,
0092               struct drm_file *file_priv)
0093 {
0094     struct drm_mode_card_res *card_res = data;
0095     struct drm_framebuffer *fb;
0096     struct drm_connector *connector;
0097     struct drm_crtc *crtc;
0098     struct drm_encoder *encoder;
0099     int count, ret = 0;
0100     uint32_t __user *fb_id;
0101     uint32_t __user *crtc_id;
0102     uint32_t __user *connector_id;
0103     uint32_t __user *encoder_id;
0104     struct drm_connector_list_iter conn_iter;
0105 
0106     if (!drm_core_check_feature(dev, DRIVER_MODESET))
0107         return -EOPNOTSUPP;
0108 
0109     mutex_lock(&file_priv->fbs_lock);
0110     count = 0;
0111     fb_id = u64_to_user_ptr(card_res->fb_id_ptr);
0112     list_for_each_entry(fb, &file_priv->fbs, filp_head) {
0113         if (count < card_res->count_fbs &&
0114             put_user(fb->base.id, fb_id + count)) {
0115             mutex_unlock(&file_priv->fbs_lock);
0116             return -EFAULT;
0117         }
0118         count++;
0119     }
0120     card_res->count_fbs = count;
0121     mutex_unlock(&file_priv->fbs_lock);
0122 
0123     card_res->max_height = dev->mode_config.max_height;
0124     card_res->min_height = dev->mode_config.min_height;
0125     card_res->max_width = dev->mode_config.max_width;
0126     card_res->min_width = dev->mode_config.min_width;
0127 
0128     count = 0;
0129     crtc_id = u64_to_user_ptr(card_res->crtc_id_ptr);
0130     drm_for_each_crtc(crtc, dev) {
0131         if (drm_lease_held(file_priv, crtc->base.id)) {
0132             if (count < card_res->count_crtcs &&
0133                 put_user(crtc->base.id, crtc_id + count))
0134                 return -EFAULT;
0135             count++;
0136         }
0137     }
0138     card_res->count_crtcs = count;
0139 
0140     count = 0;
0141     encoder_id = u64_to_user_ptr(card_res->encoder_id_ptr);
0142     drm_for_each_encoder(encoder, dev) {
0143         if (count < card_res->count_encoders &&
0144             put_user(encoder->base.id, encoder_id + count))
0145             return -EFAULT;
0146         count++;
0147     }
0148     card_res->count_encoders = count;
0149 
0150     drm_connector_list_iter_begin(dev, &conn_iter);
0151     count = 0;
0152     connector_id = u64_to_user_ptr(card_res->connector_id_ptr);
0153     drm_for_each_connector_iter(connector, &conn_iter) {
0154         /* only expose writeback connectors if userspace understands them */
0155         if (!file_priv->writeback_connectors &&
0156             (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK))
0157             continue;
0158 
0159         if (drm_lease_held(file_priv, connector->base.id)) {
0160             if (count < card_res->count_connectors &&
0161                 put_user(connector->base.id, connector_id + count)) {
0162                 drm_connector_list_iter_end(&conn_iter);
0163                 return -EFAULT;
0164             }
0165             count++;
0166         }
0167     }
0168     card_res->count_connectors = count;
0169     drm_connector_list_iter_end(&conn_iter);
0170 
0171     return ret;
0172 }
0173 
0174 /**
0175  * drm_mode_config_reset - call ->reset callbacks
0176  * @dev: drm device
0177  *
0178  * This functions calls all the crtc's, encoder's and connector's ->reset
0179  * callback. Drivers can use this in e.g. their driver load or resume code to
0180  * reset hardware and software state.
0181  */
0182 void drm_mode_config_reset(struct drm_device *dev)
0183 {
0184     struct drm_crtc *crtc;
0185     struct drm_plane *plane;
0186     struct drm_encoder *encoder;
0187     struct drm_connector *connector;
0188     struct drm_connector_list_iter conn_iter;
0189 
0190     drm_for_each_plane(plane, dev)
0191         if (plane->funcs->reset)
0192             plane->funcs->reset(plane);
0193 
0194     drm_for_each_crtc(crtc, dev)
0195         if (crtc->funcs->reset)
0196             crtc->funcs->reset(crtc);
0197 
0198     drm_for_each_encoder(encoder, dev)
0199         if (encoder->funcs && encoder->funcs->reset)
0200             encoder->funcs->reset(encoder);
0201 
0202     drm_connector_list_iter_begin(dev, &conn_iter);
0203     drm_for_each_connector_iter(connector, &conn_iter)
0204         if (connector->funcs->reset)
0205             connector->funcs->reset(connector);
0206     drm_connector_list_iter_end(&conn_iter);
0207 }
0208 EXPORT_SYMBOL(drm_mode_config_reset);
0209 
0210 /*
0211  * Global properties
0212  */
0213 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
0214     { DRM_PLANE_TYPE_OVERLAY, "Overlay" },
0215     { DRM_PLANE_TYPE_PRIMARY, "Primary" },
0216     { DRM_PLANE_TYPE_CURSOR, "Cursor" },
0217 };
0218 
0219 static int drm_mode_create_standard_properties(struct drm_device *dev)
0220 {
0221     struct drm_property *prop;
0222     int ret;
0223 
0224     ret = drm_connector_create_standard_properties(dev);
0225     if (ret)
0226         return ret;
0227 
0228     prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
0229                     "type", drm_plane_type_enum_list,
0230                     ARRAY_SIZE(drm_plane_type_enum_list));
0231     if (!prop)
0232         return -ENOMEM;
0233     dev->mode_config.plane_type_property = prop;
0234 
0235     prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
0236             "SRC_X", 0, UINT_MAX);
0237     if (!prop)
0238         return -ENOMEM;
0239     dev->mode_config.prop_src_x = prop;
0240 
0241     prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
0242             "SRC_Y", 0, UINT_MAX);
0243     if (!prop)
0244         return -ENOMEM;
0245     dev->mode_config.prop_src_y = prop;
0246 
0247     prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
0248             "SRC_W", 0, UINT_MAX);
0249     if (!prop)
0250         return -ENOMEM;
0251     dev->mode_config.prop_src_w = prop;
0252 
0253     prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
0254             "SRC_H", 0, UINT_MAX);
0255     if (!prop)
0256         return -ENOMEM;
0257     dev->mode_config.prop_src_h = prop;
0258 
0259     prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
0260             "CRTC_X", INT_MIN, INT_MAX);
0261     if (!prop)
0262         return -ENOMEM;
0263     dev->mode_config.prop_crtc_x = prop;
0264 
0265     prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
0266             "CRTC_Y", INT_MIN, INT_MAX);
0267     if (!prop)
0268         return -ENOMEM;
0269     dev->mode_config.prop_crtc_y = prop;
0270 
0271     prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
0272             "CRTC_W", 0, INT_MAX);
0273     if (!prop)
0274         return -ENOMEM;
0275     dev->mode_config.prop_crtc_w = prop;
0276 
0277     prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
0278             "CRTC_H", 0, INT_MAX);
0279     if (!prop)
0280         return -ENOMEM;
0281     dev->mode_config.prop_crtc_h = prop;
0282 
0283     prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
0284             "FB_ID", DRM_MODE_OBJECT_FB);
0285     if (!prop)
0286         return -ENOMEM;
0287     dev->mode_config.prop_fb_id = prop;
0288 
0289     prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
0290             "IN_FENCE_FD", -1, INT_MAX);
0291     if (!prop)
0292         return -ENOMEM;
0293     dev->mode_config.prop_in_fence_fd = prop;
0294 
0295     prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
0296             "OUT_FENCE_PTR", 0, U64_MAX);
0297     if (!prop)
0298         return -ENOMEM;
0299     dev->mode_config.prop_out_fence_ptr = prop;
0300 
0301     prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
0302             "CRTC_ID", DRM_MODE_OBJECT_CRTC);
0303     if (!prop)
0304         return -ENOMEM;
0305     dev->mode_config.prop_crtc_id = prop;
0306 
0307     prop = drm_property_create(dev,
0308             DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
0309             "FB_DAMAGE_CLIPS", 0);
0310     if (!prop)
0311         return -ENOMEM;
0312     dev->mode_config.prop_fb_damage_clips = prop;
0313 
0314     prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
0315             "ACTIVE");
0316     if (!prop)
0317         return -ENOMEM;
0318     dev->mode_config.prop_active = prop;
0319 
0320     prop = drm_property_create(dev,
0321             DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
0322             "MODE_ID", 0);
0323     if (!prop)
0324         return -ENOMEM;
0325     dev->mode_config.prop_mode_id = prop;
0326 
0327     prop = drm_property_create_bool(dev, 0,
0328             "VRR_ENABLED");
0329     if (!prop)
0330         return -ENOMEM;
0331     dev->mode_config.prop_vrr_enabled = prop;
0332 
0333     prop = drm_property_create(dev,
0334             DRM_MODE_PROP_BLOB,
0335             "DEGAMMA_LUT", 0);
0336     if (!prop)
0337         return -ENOMEM;
0338     dev->mode_config.degamma_lut_property = prop;
0339 
0340     prop = drm_property_create_range(dev,
0341             DRM_MODE_PROP_IMMUTABLE,
0342             "DEGAMMA_LUT_SIZE", 0, UINT_MAX);
0343     if (!prop)
0344         return -ENOMEM;
0345     dev->mode_config.degamma_lut_size_property = prop;
0346 
0347     prop = drm_property_create(dev,
0348             DRM_MODE_PROP_BLOB,
0349             "CTM", 0);
0350     if (!prop)
0351         return -ENOMEM;
0352     dev->mode_config.ctm_property = prop;
0353 
0354     prop = drm_property_create(dev,
0355             DRM_MODE_PROP_BLOB,
0356             "GAMMA_LUT", 0);
0357     if (!prop)
0358         return -ENOMEM;
0359     dev->mode_config.gamma_lut_property = prop;
0360 
0361     prop = drm_property_create_range(dev,
0362             DRM_MODE_PROP_IMMUTABLE,
0363             "GAMMA_LUT_SIZE", 0, UINT_MAX);
0364     if (!prop)
0365         return -ENOMEM;
0366     dev->mode_config.gamma_lut_size_property = prop;
0367 
0368     prop = drm_property_create(dev,
0369                    DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
0370                    "IN_FORMATS", 0);
0371     if (!prop)
0372         return -ENOMEM;
0373     dev->mode_config.modifiers_property = prop;
0374 
0375     return 0;
0376 }
0377 
0378 static void drm_mode_config_init_release(struct drm_device *dev, void *ptr)
0379 {
0380     drm_mode_config_cleanup(dev);
0381 }
0382 
0383 /**
0384  * drmm_mode_config_init - managed DRM mode_configuration structure
0385  *  initialization
0386  * @dev: DRM device
0387  *
0388  * Initialize @dev's mode_config structure, used for tracking the graphics
0389  * configuration of @dev.
0390  *
0391  * Since this initializes the modeset locks, no locking is possible. Which is no
0392  * problem, since this should happen single threaded at init time. It is the
0393  * driver's problem to ensure this guarantee.
0394  *
0395  * Cleanup is automatically handled through registering drm_mode_config_cleanup
0396  * with drmm_add_action().
0397  *
0398  * Returns: 0 on success, negative error value on failure.
0399  */
0400 int drmm_mode_config_init(struct drm_device *dev)
0401 {
0402     mutex_init(&dev->mode_config.mutex);
0403     drm_modeset_lock_init(&dev->mode_config.connection_mutex);
0404     mutex_init(&dev->mode_config.idr_mutex);
0405     mutex_init(&dev->mode_config.fb_lock);
0406     mutex_init(&dev->mode_config.blob_lock);
0407     INIT_LIST_HEAD(&dev->mode_config.fb_list);
0408     INIT_LIST_HEAD(&dev->mode_config.crtc_list);
0409     INIT_LIST_HEAD(&dev->mode_config.connector_list);
0410     INIT_LIST_HEAD(&dev->mode_config.encoder_list);
0411     INIT_LIST_HEAD(&dev->mode_config.property_list);
0412     INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
0413     INIT_LIST_HEAD(&dev->mode_config.plane_list);
0414     INIT_LIST_HEAD(&dev->mode_config.privobj_list);
0415     idr_init(&dev->mode_config.object_idr);
0416     idr_init(&dev->mode_config.tile_idr);
0417     ida_init(&dev->mode_config.connector_ida);
0418     spin_lock_init(&dev->mode_config.connector_list_lock);
0419 
0420     init_llist_head(&dev->mode_config.connector_free_list);
0421     INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn);
0422 
0423     drm_mode_create_standard_properties(dev);
0424 
0425     /* Just to be sure */
0426     dev->mode_config.num_fb = 0;
0427     dev->mode_config.num_connector = 0;
0428     dev->mode_config.num_crtc = 0;
0429     dev->mode_config.num_encoder = 0;
0430     dev->mode_config.num_total_plane = 0;
0431 
0432     if (IS_ENABLED(CONFIG_LOCKDEP)) {
0433         struct drm_modeset_acquire_ctx modeset_ctx;
0434         struct ww_acquire_ctx resv_ctx;
0435         struct dma_resv resv;
0436         int ret;
0437 
0438         dma_resv_init(&resv);
0439 
0440         drm_modeset_acquire_init(&modeset_ctx, 0);
0441         ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
0442                        &modeset_ctx);
0443         if (ret == -EDEADLK)
0444             ret = drm_modeset_backoff(&modeset_ctx);
0445 
0446         ww_acquire_init(&resv_ctx, &reservation_ww_class);
0447         ret = dma_resv_lock(&resv, &resv_ctx);
0448         if (ret == -EDEADLK)
0449             dma_resv_lock_slow(&resv, &resv_ctx);
0450 
0451         dma_resv_unlock(&resv);
0452         ww_acquire_fini(&resv_ctx);
0453 
0454         drm_modeset_drop_locks(&modeset_ctx);
0455         drm_modeset_acquire_fini(&modeset_ctx);
0456         dma_resv_fini(&resv);
0457     }
0458 
0459     return drmm_add_action_or_reset(dev, drm_mode_config_init_release,
0460                     NULL);
0461 }
0462 EXPORT_SYMBOL(drmm_mode_config_init);
0463 
0464 /**
0465  * drm_mode_config_cleanup - free up DRM mode_config info
0466  * @dev: DRM device
0467  *
0468  * Free up all the connectors and CRTCs associated with this DRM device, then
0469  * free up the framebuffers and associated buffer objects.
0470  *
0471  * Note that since this /should/ happen single-threaded at driver/device
0472  * teardown time, no locking is required. It's the driver's job to ensure that
0473  * this guarantee actually holds true.
0474  *
0475  * FIXME: With the managed drmm_mode_config_init() it is no longer necessary for
0476  * drivers to explicitly call this function.
0477  */
0478 void drm_mode_config_cleanup(struct drm_device *dev)
0479 {
0480     struct drm_connector *connector;
0481     struct drm_connector_list_iter conn_iter;
0482     struct drm_crtc *crtc, *ct;
0483     struct drm_encoder *encoder, *enct;
0484     struct drm_framebuffer *fb, *fbt;
0485     struct drm_property *property, *pt;
0486     struct drm_property_blob *blob, *bt;
0487     struct drm_plane *plane, *plt;
0488 
0489     list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
0490                  head) {
0491         encoder->funcs->destroy(encoder);
0492     }
0493 
0494     drm_connector_list_iter_begin(dev, &conn_iter);
0495     drm_for_each_connector_iter(connector, &conn_iter) {
0496         /* drm_connector_list_iter holds an full reference to the
0497          * current connector itself, which means it is inherently safe
0498          * against unreferencing the current connector - but not against
0499          * deleting it right away. */
0500         drm_connector_put(connector);
0501     }
0502     drm_connector_list_iter_end(&conn_iter);
0503     /* connector_iter drops references in a work item. */
0504     flush_work(&dev->mode_config.connector_free_work);
0505     if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) {
0506         drm_connector_list_iter_begin(dev, &conn_iter);
0507         drm_for_each_connector_iter(connector, &conn_iter)
0508             DRM_ERROR("connector %s leaked!\n", connector->name);
0509         drm_connector_list_iter_end(&conn_iter);
0510     }
0511 
0512     list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
0513                  head) {
0514         drm_property_destroy(dev, property);
0515     }
0516 
0517     list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
0518                  head) {
0519         plane->funcs->destroy(plane);
0520     }
0521 
0522     list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
0523         crtc->funcs->destroy(crtc);
0524     }
0525 
0526     list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
0527                  head_global) {
0528         drm_property_blob_put(blob);
0529     }
0530 
0531     /*
0532      * Single-threaded teardown context, so it's not required to grab the
0533      * fb_lock to protect against concurrent fb_list access. Contrary, it
0534      * would actually deadlock with the drm_framebuffer_cleanup function.
0535      *
0536      * Also, if there are any framebuffers left, that's a driver leak now,
0537      * so politely WARN about this.
0538      */
0539     WARN_ON(!list_empty(&dev->mode_config.fb_list));
0540     list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
0541         struct drm_printer p = drm_debug_printer("[leaked fb]");
0542 
0543         drm_printf(&p, "framebuffer[%u]:\n", fb->base.id);
0544         drm_framebuffer_print_info(&p, 1, fb);
0545         drm_framebuffer_free(&fb->base.refcount);
0546     }
0547 
0548     ida_destroy(&dev->mode_config.connector_ida);
0549     idr_destroy(&dev->mode_config.tile_idr);
0550     idr_destroy(&dev->mode_config.object_idr);
0551     drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
0552 }
0553 EXPORT_SYMBOL(drm_mode_config_cleanup);
0554 
0555 static u32 full_encoder_mask(struct drm_device *dev)
0556 {
0557     struct drm_encoder *encoder;
0558     u32 encoder_mask = 0;
0559 
0560     drm_for_each_encoder(encoder, dev)
0561         encoder_mask |= drm_encoder_mask(encoder);
0562 
0563     return encoder_mask;
0564 }
0565 
0566 /*
0567  * For some reason we want the encoder itself included in
0568  * possible_clones. Make life easy for drivers by allowing them
0569  * to leave possible_clones unset if no cloning is possible.
0570  */
0571 static void fixup_encoder_possible_clones(struct drm_encoder *encoder)
0572 {
0573     if (encoder->possible_clones == 0)
0574         encoder->possible_clones = drm_encoder_mask(encoder);
0575 }
0576 
0577 static void validate_encoder_possible_clones(struct drm_encoder *encoder)
0578 {
0579     struct drm_device *dev = encoder->dev;
0580     u32 encoder_mask = full_encoder_mask(dev);
0581     struct drm_encoder *other;
0582 
0583     drm_for_each_encoder(other, dev) {
0584         WARN(!!(encoder->possible_clones & drm_encoder_mask(other)) !=
0585              !!(other->possible_clones & drm_encoder_mask(encoder)),
0586              "possible_clones mismatch: "
0587              "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x vs. "
0588              "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x\n",
0589              encoder->base.id, encoder->name,
0590              drm_encoder_mask(encoder), encoder->possible_clones,
0591              other->base.id, other->name,
0592              drm_encoder_mask(other), other->possible_clones);
0593     }
0594 
0595     WARN((encoder->possible_clones & drm_encoder_mask(encoder)) == 0 ||
0596          (encoder->possible_clones & ~encoder_mask) != 0,
0597          "Bogus possible_clones: "
0598          "[ENCODER:%d:%s] possible_clones=0x%x (full encoder mask=0x%x)\n",
0599          encoder->base.id, encoder->name,
0600          encoder->possible_clones, encoder_mask);
0601 }
0602 
0603 static u32 full_crtc_mask(struct drm_device *dev)
0604 {
0605     struct drm_crtc *crtc;
0606     u32 crtc_mask = 0;
0607 
0608     drm_for_each_crtc(crtc, dev)
0609         crtc_mask |= drm_crtc_mask(crtc);
0610 
0611     return crtc_mask;
0612 }
0613 
0614 static void validate_encoder_possible_crtcs(struct drm_encoder *encoder)
0615 {
0616     u32 crtc_mask = full_crtc_mask(encoder->dev);
0617 
0618     WARN((encoder->possible_crtcs & crtc_mask) == 0 ||
0619          (encoder->possible_crtcs & ~crtc_mask) != 0,
0620          "Bogus possible_crtcs: "
0621          "[ENCODER:%d:%s] possible_crtcs=0x%x (full crtc mask=0x%x)\n",
0622          encoder->base.id, encoder->name,
0623          encoder->possible_crtcs, crtc_mask);
0624 }
0625 
0626 void drm_mode_config_validate(struct drm_device *dev)
0627 {
0628     struct drm_encoder *encoder;
0629     struct drm_crtc *crtc;
0630     struct drm_plane *plane;
0631     u32 primary_with_crtc = 0, cursor_with_crtc = 0;
0632     unsigned int num_primary = 0;
0633 
0634     if (!drm_core_check_feature(dev, DRIVER_MODESET))
0635         return;
0636 
0637     drm_for_each_encoder(encoder, dev)
0638         fixup_encoder_possible_clones(encoder);
0639 
0640     drm_for_each_encoder(encoder, dev) {
0641         validate_encoder_possible_clones(encoder);
0642         validate_encoder_possible_crtcs(encoder);
0643     }
0644 
0645     drm_for_each_crtc(crtc, dev) {
0646         WARN(!crtc->primary, "Missing primary plane on [CRTC:%d:%s]\n",
0647              crtc->base.id, crtc->name);
0648 
0649         WARN(crtc->cursor && crtc->funcs->cursor_set,
0650              "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set func",
0651              crtc->base.id, crtc->name);
0652         WARN(crtc->cursor && crtc->funcs->cursor_set2,
0653              "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set2 func",
0654              crtc->base.id, crtc->name);
0655         WARN(crtc->cursor && crtc->funcs->cursor_move,
0656              "[CRTC:%d:%s] must not have both a cursor plane and a cursor_move func",
0657              crtc->base.id, crtc->name);
0658 
0659         if (crtc->primary) {
0660             WARN(!(crtc->primary->possible_crtcs & drm_crtc_mask(crtc)),
0661                  "Bogus primary plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n",
0662                  crtc->primary->base.id, crtc->primary->name,
0663                  crtc->base.id, crtc->name);
0664             WARN(primary_with_crtc & drm_plane_mask(crtc->primary),
0665                  "Primary plane [PLANE:%d:%s] used for multiple CRTCs",
0666                  crtc->primary->base.id, crtc->primary->name);
0667             primary_with_crtc |= drm_plane_mask(crtc->primary);
0668         }
0669         if (crtc->cursor) {
0670             WARN(!(crtc->cursor->possible_crtcs & drm_crtc_mask(crtc)),
0671                  "Bogus cursor plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n",
0672                  crtc->cursor->base.id, crtc->cursor->name,
0673                  crtc->base.id, crtc->name);
0674             WARN(cursor_with_crtc & drm_plane_mask(crtc->cursor),
0675                  "Cursor plane [PLANE:%d:%s] used for multiple CRTCs",
0676                  crtc->cursor->base.id, crtc->cursor->name);
0677             cursor_with_crtc |= drm_plane_mask(crtc->cursor);
0678         }
0679     }
0680 
0681     drm_for_each_plane(plane, dev) {
0682         if (plane->type == DRM_PLANE_TYPE_PRIMARY)
0683             num_primary++;
0684     }
0685 
0686     WARN(num_primary != dev->mode_config.num_crtc,
0687          "Must have as many primary planes as there are CRTCs, but have %u primary planes and %u CRTCs",
0688          num_primary, dev->mode_config.num_crtc);
0689 }
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