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 /*
  * Copyright (c) 2016 Intel Corporation
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
  * the above copyright notice appear in all copies and that both that copyright
  * notice and this permission notice appear in supporting documentation, and
  * that the name of the copyright holders not be used in advertising or
  * publicity pertaining to distribution of the software without specific,
  * written prior permission.  The copyright holders make no representations
  * about the suitability of this software for any purpose.  It is provided "as
  * is" without express or implied warranty.
  *
  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  * OF THIS SOFTWARE.
  */
 
 #ifndef __DRM_MODE_CONFIG_H__
 #define __DRM_MODE_CONFIG_H__
 
 #include <linux/mutex.h>
 #include <linux/types.h>
 #include <linux/idr.h>
 #include <linux/workqueue.h>
 #include <linux/llist.h>
 
 #include <drm/drm_modeset_lock.h>
 
 struct drm_file;
 struct drm_device;
 struct drm_atomic_state;
 struct drm_mode_fb_cmd2;
 struct drm_format_info;
 struct drm_display_mode;
 
 /**
  * struct drm_mode_config_funcs - basic driver provided mode setting functions
  *
  * Some global (i.e. not per-CRTC, connector, etc) mode setting functions that
  * involve drivers.
  */
 struct drm_mode_config_funcs {
     /**
      * @fb_create:
      *
      * Create a new framebuffer object. The core does basic checks on the
      * requested metadata, but most of that is left to the driver. See
      * &struct drm_mode_fb_cmd2 for details.
      *
      * To validate the pixel format and modifier drivers can use
      * drm_any_plane_has_format() to make sure at least one plane supports
      * the requested values. Note that the driver must first determine the
      * actual modifier used if the request doesn't have it specified,
      * ie. when (@mode_cmd->flags & DRM_MODE_FB_MODIFIERS) == 0.
      *
      * IMPORTANT: These implied modifiers for legacy userspace must be
      * stored in struct &drm_framebuffer, including all relevant metadata
      * like &drm_framebuffer.pitches and &drm_framebuffer.offsets if the
      * modifier enables additional planes beyond the fourcc pixel format
      * code. This is required by the GETFB2 ioctl.
      *
      * If the parameters are deemed valid and the backing storage objects in
      * the underlying memory manager all exist, then the driver allocates
      * a new &drm_framebuffer structure, subclassed to contain
      * driver-specific information (like the internal native buffer object
      * references). It also needs to fill out all relevant metadata, which
      * should be done by calling drm_helper_mode_fill_fb_struct().
      *
      * The initialization is finalized by calling drm_framebuffer_init(),
      * which registers the framebuffer and makes it accessible to other
      * threads.
      *
      * RETURNS:
      *
      * A new framebuffer with an initial reference count of 1 or a negative
      * error code encoded with ERR_PTR().
      */
     struct drm_framebuffer *(*fb_create)(struct drm_device *dev,
                          struct drm_file *file_priv,
                          const struct drm_mode_fb_cmd2 *mode_cmd);
 
     /**
      * @get_format_info:
      *
      * Allows a driver to return custom format information for special
      * fb layouts (eg. ones with auxiliary compression control planes).
      *
      * RETURNS:
      *
      * The format information specific to the given fb metadata, or
      * NULL if none is found.
      */
     const struct drm_format_info *(*get_format_info)(const struct drm_mode_fb_cmd2 *mode_cmd);
 
     /**
      * @output_poll_changed:
      *
      * Callback used by helpers to inform the driver of output configuration
      * changes.
      *
      * Drivers implementing fbdev emulation use drm_kms_helper_hotplug_event()
      * to call this hook to inform the fbdev helper of output changes.
      *
      * This hook is deprecated, drivers should instead use
      * drm_fbdev_generic_setup() which takes care of any necessary
      * hotplug event forwarding already without further involvement by
      * the driver.
      */
     void (*output_poll_changed)(struct drm_device *dev);
 
     /**
      * @mode_valid:
      *
      * Device specific validation of display modes. Can be used to reject
      * modes that can never be supported. Only device wide constraints can
      * be checked here. crtc/encoder/bridge/connector specific constraints
      * should be checked in the .mode_valid() hook for each specific object.
      */
     enum drm_mode_status (*mode_valid)(struct drm_device *dev,
                        const struct drm_display_mode *mode);
 
     /**
      * @atomic_check:
      *
      * This is the only hook to validate an atomic modeset update. This
      * function must reject any modeset and state changes which the hardware
      * or driver doesn't support. This includes but is of course not limited
      * to:
      *
      *  - Checking that the modes, framebuffers, scaling and placement
      *    requirements and so on are within the limits of the hardware.
      *
      *  - Checking that any hidden shared resources are not oversubscribed.
      *    This can be shared PLLs, shared lanes, overall memory bandwidth,
      *    display fifo space (where shared between planes or maybe even
      *    CRTCs).
      *
      *  - Checking that virtualized resources exported to userspace are not
      *    oversubscribed. For various reasons it can make sense to expose
      *    more planes, crtcs or encoders than which are physically there. One
      *    example is dual-pipe operations (which generally should be hidden
      *    from userspace if when lockstepped in hardware, exposed otherwise),
      *    where a plane might need 1 hardware plane (if it's just on one
      *    pipe), 2 hardware planes (when it spans both pipes) or maybe even
      *    shared a hardware plane with a 2nd plane (if there's a compatible
      *    plane requested on the area handled by the other pipe).
      *
      *  - Check that any transitional state is possible and that if
      *    requested, the update can indeed be done in the vblank period
      *    without temporarily disabling some functions.
      *
      *  - Check any other constraints the driver or hardware might have.
      *
      *  - This callback also needs to correctly fill out the &drm_crtc_state
      *    in this update to make sure that drm_atomic_crtc_needs_modeset()
      *    reflects the nature of the possible update and returns true if and
      *    only if the update cannot be applied without tearing within one
      *    vblank on that CRTC. The core uses that information to reject
      *    updates which require a full modeset (i.e. blanking the screen, or
      *    at least pausing updates for a substantial amount of time) if
      *    userspace has disallowed that in its request.
      *
      *  - The driver also does not need to repeat basic input validation
      *    like done for the corresponding legacy entry points. The core does
      *    that before calling this hook.
      *
      * See the documentation of @atomic_commit for an exhaustive list of
      * error conditions which don't have to be checked at the in this
      * callback.
      *
      * See the documentation for &struct drm_atomic_state for how exactly
      * an atomic modeset update is described.
      *
      * Drivers using the atomic helpers can implement this hook using
      * drm_atomic_helper_check(), or one of the exported sub-functions of
      * it.
      *
      * RETURNS:
      *
      * 0 on success or one of the below negative error codes:
      *
      *  - -EINVAL, if any of the above constraints are violated.
      *
      *  - -EDEADLK, when returned from an attempt to acquire an additional
      *    &drm_modeset_lock through drm_modeset_lock().
      *
      *  - -ENOMEM, if allocating additional state sub-structures failed due
      *    to lack of memory.
      *
      *  - -EINTR, -EAGAIN or -ERESTARTSYS, if the IOCTL should be restarted.
      *    This can either be due to a pending signal, or because the driver
      *    needs to completely bail out to recover from an exceptional
      *    situation like a GPU hang. From a userspace point all errors are
      *    treated equally.
      */
     int (*atomic_check)(struct drm_device *dev,
                 struct drm_atomic_state *state);
 
     /**
      * @atomic_commit:
      *
      * This is the only hook to commit an atomic modeset update. The core
      * guarantees that @atomic_check has been called successfully before
      * calling this function, and that nothing has been changed in the
      * interim.
      *
      * See the documentation for &struct drm_atomic_state for how exactly
      * an atomic modeset update is described.
      *
      * Drivers using the atomic helpers can implement this hook using
      * drm_atomic_helper_commit(), or one of the exported sub-functions of
      * it.
      *
      * Nonblocking commits (as indicated with the nonblock parameter) must
      * do any preparatory work which might result in an unsuccessful commit
      * in the context of this callback. The only exceptions are hardware
      * errors resulting in -EIO. But even in that case the driver must
      * ensure that the display pipe is at least running, to avoid
      * compositors crashing when pageflips don't work. Anything else,
      * specifically committing the update to the hardware, should be done
      * without blocking the caller. For updates which do not require a
      * modeset this must be guaranteed.
      *
      * The driver must wait for any pending rendering to the new
      * framebuffers to complete before executing the flip. It should also
      * wait for any pending rendering from other drivers if the underlying
      * buffer is a shared dma-buf. Nonblocking commits must not wait for
      * rendering in the context of this callback.
      *
      * An application can request to be notified when the atomic commit has
      * completed. These events are per-CRTC and can be distinguished by the
      * CRTC index supplied in &drm_event to userspace.
      *
      * The drm core will supply a &struct drm_event in each CRTC's
      * &drm_crtc_state.event. See the documentation for
      * &drm_crtc_state.event for more details about the precise semantics of
      * this event.
      *
      * NOTE:
      *
      * Drivers are not allowed to shut down any display pipe successfully
      * enabled through an atomic commit on their own. Doing so can result in
      * compositors crashing if a page flip is suddenly rejected because the
      * pipe is off.
      *
      * RETURNS:
      *
      * 0 on success or one of the below negative error codes:
      *
      *  - -EBUSY, if a nonblocking updated is requested and there is
      *    an earlier updated pending. Drivers are allowed to support a queue
      *    of outstanding updates, but currently no driver supports that.
      *    Note that drivers must wait for preceding updates to complete if a
      *    synchronous update is requested, they are not allowed to fail the
      *    commit in that case.
      *
      *  - -ENOMEM, if the driver failed to allocate memory. Specifically
      *    this can happen when trying to pin framebuffers, which must only
      *    be done when committing the state.
      *
      *  - -ENOSPC, as a refinement of the more generic -ENOMEM to indicate
      *    that the driver has run out of vram, iommu space or similar GPU
      *    address space needed for framebuffer.
      *
      *  - -EIO, if the hardware completely died.
      *
      *  - -EINTR, -EAGAIN or -ERESTARTSYS, if the IOCTL should be restarted.
      *    This can either be due to a pending signal, or because the driver
      *    needs to completely bail out to recover from an exceptional
      *    situation like a GPU hang. From a userspace point of view all errors are
      *    treated equally.
      *
      * This list is exhaustive. Specifically this hook is not allowed to
      * return -EINVAL (any invalid requests should be caught in
      * @atomic_check) or -EDEADLK (this function must not acquire
      * additional modeset locks).
      */
     int (*atomic_commit)(struct drm_device *dev,
                  struct drm_atomic_state *state,
                  bool nonblock);
 
     /**
      * @atomic_state_alloc:
      *
      * This optional hook can be used by drivers that want to subclass struct
      * &drm_atomic_state to be able to track their own driver-private global
      * state easily. If this hook is implemented, drivers must also
      * implement @atomic_state_clear and @atomic_state_free.
      *
      * Subclassing of &drm_atomic_state is deprecated in favour of using
      * &drm_private_state and &drm_private_obj.
      *
      * RETURNS:
      *
      * A new &drm_atomic_state on success or NULL on failure.
      */
     struct drm_atomic_state *(*atomic_state_alloc)(struct drm_device *dev);
 
     /**
      * @atomic_state_clear:
      *
      * This hook must clear any driver private state duplicated into the
      * passed-in &drm_atomic_state. This hook is called when the caller
      * encountered a &drm_modeset_lock deadlock and needs to drop all
      * already acquired locks as part of the deadlock avoidance dance
      * implemented in drm_modeset_backoff().
      *
      * Any duplicated state must be invalidated since a concurrent atomic
      * update might change it, and the drm atomic interfaces always apply
      * updates as relative changes to the current state.
      *
      * Drivers that implement this must call drm_atomic_state_default_clear()
      * to clear common state.
      *
      * Subclassing of &drm_atomic_state is deprecated in favour of using
      * &drm_private_state and &drm_private_obj.
      */
     void (*atomic_state_clear)(struct drm_atomic_state *state);
 
     /**
      * @atomic_state_free:
      *
      * This hook needs driver private resources and the &drm_atomic_state
      * itself. Note that the core first calls drm_atomic_state_clear() to
      * avoid code duplicate between the clear and free hooks.
      *
      * Drivers that implement this must call
      * drm_atomic_state_default_release() to release common resources.
      *
      * Subclassing of &drm_atomic_state is deprecated in favour of using
      * &drm_private_state and &drm_private_obj.
      */
     void (*atomic_state_free)(struct drm_atomic_state *state);
 };
 
 /**
  * struct drm_mode_config - Mode configuration control structure
  * @min_width: minimum fb pixel width on this device
  * @min_height: minimum fb pixel height on this device
  * @max_width: maximum fb pixel width on this device
  * @max_height: maximum fb pixel height on this device
  * @funcs: core driver provided mode setting functions
  * @fb_base: base address of the framebuffer
  * @poll_enabled: track polling support for this device
  * @poll_running: track polling status for this device
  * @delayed_event: track delayed poll uevent deliver for this device
  * @output_poll_work: delayed work for polling in process context
  * @preferred_depth: preferred RBG pixel depth, used by fb helpers
  * @prefer_shadow: hint to userspace to prefer shadow-fb rendering
  * @cursor_width: hint to userspace for max cursor width
  * @cursor_height: hint to userspace for max cursor height
  * @helper_private: mid-layer private data
  *
  * Core mode resource tracking structure.  All CRTC, encoders, and connectors
  * enumerated by the driver are added here, as are global properties.  Some
  * global restrictions are also here, e.g. dimension restrictions.
  *
  * Framebuffer sizes refer to the virtual screen that can be displayed by
  * the CRTC. This can be different from the physical resolution programmed.
  * The minimum width and height, stored in @min_width and @min_height,
  * describe the smallest size of the framebuffer. It correlates to the
  * minimum programmable resolution.
  * The maximum width, stored in @max_width, is typically limited by the
  * maximum pitch between two adjacent scanlines. The maximum height, stored
  * in @max_height, is usually only limited by the amount of addressable video
  * memory. For hardware that has no real maximum, drivers should pick a
  * reasonable default.
  *
  * See also @DRM_SHADOW_PLANE_MAX_WIDTH and @DRM_SHADOW_PLANE_MAX_HEIGHT.
  */
 struct drm_mode_config {
     /**
      * @mutex:
      *
      * This is the big scary modeset BKL which protects everything that
      * isn't protect otherwise. Scope is unclear and fuzzy, try to remove
      * anything from under its protection and move it into more well-scoped
      * locks.
      *
      * The one important thing this protects is the use of @acquire_ctx.
      */
     struct mutex mutex;
 
     /**
      * @connection_mutex:
      *
      * This protects connector state and the connector to encoder to CRTC
      * routing chain.
      *
      * For atomic drivers specifically this protects &drm_connector.state.
      */
     struct drm_modeset_lock connection_mutex;
 
     /**
      * @acquire_ctx:
      *
      * Global implicit acquire context used by atomic drivers for legacy
      * IOCTLs. Deprecated, since implicit locking contexts make it
      * impossible to use driver-private &struct drm_modeset_lock. Users of
      * this must hold @mutex.
      */
     struct drm_modeset_acquire_ctx *acquire_ctx;
 
     /**
      * @idr_mutex:
      *
      * Mutex for KMS ID allocation and management. Protects both @object_idr
      * and @tile_idr.
      */
     struct mutex idr_mutex;
 
     /**
      * @object_idr:
      *
      * Main KMS ID tracking object. Use this idr for all IDs, fb, crtc,
      * connector, modes - just makes life easier to have only one.
      */
     struct idr object_idr;
 
     /**
      * @tile_idr:
      *
      * Use this idr for allocating new IDs for tiled sinks like use in some
      * high-res DP MST screens.
      */
     struct idr tile_idr;
 
     /** @fb_lock: Mutex to protect fb the global @fb_list and @num_fb. */
     struct mutex fb_lock;
     /** @num_fb: Number of entries on @fb_list. */
     int num_fb;
     /** @fb_list: List of all &struct drm_framebuffer. */
     struct list_head fb_list;
 
     /**
      * @connector_list_lock: Protects @num_connector and
      * @connector_list and @connector_free_list.
      */
     spinlock_t connector_list_lock;
     /**
      * @num_connector: Number of connectors on this device. Protected by
      * @connector_list_lock.
      */
     int num_connector;
     /**
      * @connector_ida: ID allocator for connector indices.
      */
     struct ida connector_ida;
     /**
      * @connector_list:
      *
      * List of connector objects linked with &drm_connector.head. Protected
      * by @connector_list_lock. Only use drm_for_each_connector_iter() and
      * &struct drm_connector_list_iter to walk this list.
      */
     struct list_head connector_list;
     /**
      * @connector_free_list:
      *
      * List of connector objects linked with &drm_connector.free_head.
      * Protected by @connector_list_lock. Used by
      * drm_for_each_connector_iter() and
      * &struct drm_connector_list_iter to savely free connectors using
      * @connector_free_work.
      */
     struct llist_head connector_free_list;
     /**
      * @connector_free_work: Work to clean up @connector_free_list.
      */
     struct work_struct connector_free_work;
 
     /**
      * @num_encoder:
      *
      * Number of encoders on this device. This is invariant over the
      * lifetime of a device and hence doesn't need any locks.
      */
     int num_encoder;
     /**
      * @encoder_list:
      *
      * List of encoder objects linked with &drm_encoder.head. This is
      * invariant over the lifetime of a device and hence doesn't need any
      * locks.
      */
     struct list_head encoder_list;
 
     /**
      * @num_total_plane:
      *
      * Number of universal (i.e. with primary/curso) planes on this device.
      * This is invariant over the lifetime of a device and hence doesn't
      * need any locks.
      */
     int num_total_plane;
     /**
      * @plane_list:
      *
      * List of plane objects linked with &drm_plane.head. This is invariant
      * over the lifetime of a device and hence doesn't need any locks.
      */
     struct list_head plane_list;
 
     /**
      * @num_crtc:
      *
      * Number of CRTCs on this device linked with &drm_crtc.head. This is invariant over the lifetime
      * of a device and hence doesn't need any locks.
      */
     int num_crtc;
     /**
      * @crtc_list:
      *
      * List of CRTC objects linked with &drm_crtc.head. This is invariant
      * over the lifetime of a device and hence doesn't need any locks.
      */
     struct list_head crtc_list;
 
     /**
      * @property_list:
      *
      * List of property type objects linked with &drm_property.head. This is
      * invariant over the lifetime of a device and hence doesn't need any
      * locks.
      */
     struct list_head property_list;
 
     /**
      * @privobj_list:
      *
      * List of private objects linked with &drm_private_obj.head. This is
      * invariant over the lifetime of a device and hence doesn't need any
      * locks.
      */
     struct list_head privobj_list;
 
     int min_width, min_height;
     int max_width, max_height;
     const struct drm_mode_config_funcs *funcs;
     resource_size_t fb_base;
 
     /* output poll support */
     bool poll_enabled;
     bool poll_running;
     bool delayed_event;
     struct delayed_work output_poll_work;
 
     /**
      * @blob_lock:
      *
      * Mutex for blob property allocation and management, protects
      * @property_blob_list and &drm_file.blobs.
      */
     struct mutex blob_lock;
 
     /**
      * @property_blob_list:
      *
      * List of all the blob property objects linked with
      * &drm_property_blob.head. Protected by @blob_lock.
      */
     struct list_head property_blob_list;
 
     /* pointers to standard properties */
 
     /**
      * @edid_property: Default connector property to hold the EDID of the
      * currently connected sink, if any.
      */
     struct drm_property *edid_property;
     /**
      * @dpms_property: Default connector property to control the
      * connector's DPMS state.
      */
     struct drm_property *dpms_property;
     /**
      * @path_property: Default connector property to hold the DP MST path
      * for the port.
      */
     struct drm_property *path_property;
     /**
      * @tile_property: Default connector property to store the tile
      * position of a tiled screen, for sinks which need to be driven with
      * multiple CRTCs.
      */
     struct drm_property *tile_property;
     /**
      * @link_status_property: Default connector property for link status
      * of a connector
      */
     struct drm_property *link_status_property;
     /**
      * @plane_type_property: Default plane property to differentiate
      * CURSOR, PRIMARY and OVERLAY legacy uses of planes.
      */
     struct drm_property *plane_type_property;
     /**
      * @prop_src_x: Default atomic plane property for the plane source
      * position in the connected &drm_framebuffer.
      */
     struct drm_property *prop_src_x;
     /**
      * @prop_src_y: Default atomic plane property for the plane source
      * position in the connected &drm_framebuffer.
      */
     struct drm_property *prop_src_y;
     /**
      * @prop_src_w: Default atomic plane property for the plane source
      * position in the connected &drm_framebuffer.
      */
     struct drm_property *prop_src_w;
     /**
      * @prop_src_h: Default atomic plane property for the plane source
      * position in the connected &drm_framebuffer.
      */
     struct drm_property *prop_src_h;
     /**
      * @prop_crtc_x: Default atomic plane property for the plane destination
      * position in the &drm_crtc is being shown on.
      */
     struct drm_property *prop_crtc_x;
     /**
      * @prop_crtc_y: Default atomic plane property for the plane destination
      * position in the &drm_crtc is being shown on.
      */
     struct drm_property *prop_crtc_y;
     /**
      * @prop_crtc_w: Default atomic plane property for the plane destination
      * position in the &drm_crtc is being shown on.
      */
     struct drm_property *prop_crtc_w;
     /**
      * @prop_crtc_h: Default atomic plane property for the plane destination
      * position in the &drm_crtc is being shown on.
      */
     struct drm_property *prop_crtc_h;
     /**
      * @prop_fb_id: Default atomic plane property to specify the
      * &drm_framebuffer.
      */
     struct drm_property *prop_fb_id;
     /**
      * @prop_in_fence_fd: Sync File fd representing the incoming fences
      * for a Plane.
      */
     struct drm_property *prop_in_fence_fd;
     /**
      * @prop_out_fence_ptr: Sync File fd pointer representing the
      * outgoing fences for a CRTC. Userspace should provide a pointer to a
      * value of type s32, and then cast that pointer to u64.
      */
     struct drm_property *prop_out_fence_ptr;
     /**
      * @prop_crtc_id: Default atomic plane property to specify the
      * &drm_crtc.
      */
     struct drm_property *prop_crtc_id;
     /**
      * @prop_fb_damage_clips: Optional plane property to mark damaged
      * regions on the plane in framebuffer coordinates of the framebuffer
      * attached to the plane.
      *
      * The layout of blob data is simply an array of &drm_mode_rect. Unlike
      * plane src coordinates, damage clips are not in 16.16 fixed point.
      */
     struct drm_property *prop_fb_damage_clips;
     /**
      * @prop_active: Default atomic CRTC property to control the active
      * state, which is the simplified implementation for DPMS in atomic
      * drivers.
      */
     struct drm_property *prop_active;
     /**
      * @prop_mode_id: Default atomic CRTC property to set the mode for a
      * CRTC. A 0 mode implies that the CRTC is entirely disabled - all
      * connectors must be of and active must be set to disabled, too.
      */
     struct drm_property *prop_mode_id;
     /**
      * @prop_vrr_enabled: Default atomic CRTC property to indicate
      * whether variable refresh rate should be enabled on the CRTC.
      */
     struct drm_property *prop_vrr_enabled;
 
     /**
      * @dvi_i_subconnector_property: Optional DVI-I property to
      * differentiate between analog or digital mode.
      */
     struct drm_property *dvi_i_subconnector_property;
     /**
      * @dvi_i_select_subconnector_property: Optional DVI-I property to
      * select between analog or digital mode.
      */
     struct drm_property *dvi_i_select_subconnector_property;
 
     /**
      * @dp_subconnector_property: Optional DP property to differentiate
      * between different DP downstream port types.
      */
     struct drm_property *dp_subconnector_property;
 
     /**
      * @tv_subconnector_property: Optional TV property to differentiate
      * between different TV connector types.
      */
     struct drm_property *tv_subconnector_property;
     /**
      * @tv_select_subconnector_property: Optional TV property to select
      * between different TV connector types.
      */
     struct drm_property *tv_select_subconnector_property;
     /**
      * @tv_mode_property: Optional TV property to select
      * the output TV mode.
      */
     struct drm_property *tv_mode_property;
     /**
      * @tv_left_margin_property: Optional TV property to set the left
      * margin (expressed in pixels).
      */
     struct drm_property *tv_left_margin_property;
     /**
      * @tv_right_margin_property: Optional TV property to set the right
      * margin (expressed in pixels).
      */
     struct drm_property *tv_right_margin_property;
     /**
      * @tv_top_margin_property: Optional TV property to set the right
      * margin (expressed in pixels).
      */
     struct drm_property *tv_top_margin_property;
     /**
      * @tv_bottom_margin_property: Optional TV property to set the right
      * margin (expressed in pixels).
      */
     struct drm_property *tv_bottom_margin_property;
     /**
      * @tv_brightness_property: Optional TV property to set the
      * brightness.
      */
     struct drm_property *tv_brightness_property;
     /**
      * @tv_contrast_property: Optional TV property to set the
      * contrast.
      */
     struct drm_property *tv_contrast_property;
     /**
      * @tv_flicker_reduction_property: Optional TV property to control the
      * flicker reduction mode.
      */
     struct drm_property *tv_flicker_reduction_property;
     /**
      * @tv_overscan_property: Optional TV property to control the overscan
      * setting.
      */
     struct drm_property *tv_overscan_property;
     /**
      * @tv_saturation_property: Optional TV property to set the
      * saturation.
      */
     struct drm_property *tv_saturation_property;
     /**
      * @tv_hue_property: Optional TV property to set the hue.
      */
     struct drm_property *tv_hue_property;
 
     /**
      * @scaling_mode_property: Optional connector property to control the
      * upscaling, mostly used for built-in panels.
      */
     struct drm_property *scaling_mode_property;
     /**
      * @aspect_ratio_property: Optional connector property to control the
      * HDMI infoframe aspect ratio setting.
      */
     struct drm_property *aspect_ratio_property;
     /**
      * @content_type_property: Optional connector property to control the
      * HDMI infoframe content type setting.
      */
     struct drm_property *content_type_property;
     /**
      * @degamma_lut_property: Optional CRTC property to set the LUT used to
      * convert the framebuffer's colors to linear gamma.
      */
     struct drm_property *degamma_lut_property;
     /**
      * @degamma_lut_size_property: Optional CRTC property for the size of
      * the degamma LUT as supported by the driver (read-only).
      */
     struct drm_property *degamma_lut_size_property;
     /**
      * @ctm_property: Optional CRTC property to set the
      * matrix used to convert colors after the lookup in the
      * degamma LUT.
      */
     struct drm_property *ctm_property;
     /**
      * @gamma_lut_property: Optional CRTC property to set the LUT used to
      * convert the colors, after the CTM matrix, to the gamma space of the
      * connected screen.
      */
     struct drm_property *gamma_lut_property;
     /**
      * @gamma_lut_size_property: Optional CRTC property for the size of the
      * gamma LUT as supported by the driver (read-only).
      */
     struct drm_property *gamma_lut_size_property;
 
     /**
      * @suggested_x_property: Optional connector property with a hint for
      * the position of the output on the host's screen.
      */
     struct drm_property *suggested_x_property;
     /**
      * @suggested_y_property: Optional connector property with a hint for
      * the position of the output on the host's screen.
      */
     struct drm_property *suggested_y_property;
 
     /**
      * @non_desktop_property: Optional connector property with a hint
      * that device isn't a standard display, and the console/desktop,
      * should not be displayed on it.
      */
     struct drm_property *non_desktop_property;
 
     /**
      * @panel_orientation_property: Optional connector property indicating
      * how the lcd-panel is mounted inside the casing (e.g. normal or
      * upside-down).
      */
     struct drm_property *panel_orientation_property;
 
     /**
      * @writeback_fb_id_property: Property for writeback connectors, storing
      * the ID of the output framebuffer.
      * See also: drm_writeback_connector_init()
      */
     struct drm_property *writeback_fb_id_property;
 
     /**
      * @writeback_pixel_formats_property: Property for writeback connectors,
      * storing an array of the supported pixel formats for the writeback
      * engine (read-only).
      * See also: drm_writeback_connector_init()
      */
     struct drm_property *writeback_pixel_formats_property;
     /**
      * @writeback_out_fence_ptr_property: Property for writeback connectors,
      * fd pointer representing the outgoing fences for a writeback
      * connector. Userspace should provide a pointer to a value of type s32,
      * and then cast that pointer to u64.
      * See also: drm_writeback_connector_init()
      */
     struct drm_property *writeback_out_fence_ptr_property;
 
     /**
      * @hdr_output_metadata_property: Connector property containing hdr
      * metatada. This will be provided by userspace compositors based
      * on HDR content
      */
     struct drm_property *hdr_output_metadata_property;
 
     /**
      * @content_protection_property: DRM ENUM property for content
      * protection. See drm_connector_attach_content_protection_property().
      */
     struct drm_property *content_protection_property;
 
     /**
      * @hdcp_content_type_property: DRM ENUM property for type of
      * Protected Content.
      */
     struct drm_property *hdcp_content_type_property;
 
     /* dumb ioctl parameters */
     uint32_t preferred_depth, prefer_shadow;
 
     /**
      * @prefer_shadow_fbdev:
      *
      * Hint to framebuffer emulation to prefer shadow-fb rendering.
      */
     bool prefer_shadow_fbdev;
 
     /**
      * @quirk_addfb_prefer_xbgr_30bpp:
      *
      * Special hack for legacy ADDFB to keep nouveau userspace happy. Should
      * only ever be set by the nouveau kernel driver.
      */
     bool quirk_addfb_prefer_xbgr_30bpp;
 
     /**
      * @quirk_addfb_prefer_host_byte_order:
      *
      * When set to true drm_mode_addfb() will pick host byte order
      * pixel_format when calling drm_mode_addfb2().  This is how
      * drm_mode_addfb() should have worked from day one.  It
      * didn't though, so we ended up with quirks in both kernel
      * and userspace drivers to deal with the broken behavior.
      * Simply fixing drm_mode_addfb() unconditionally would break
      * these drivers, so add a quirk bit here to allow drivers
      * opt-in.
      */
     bool quirk_addfb_prefer_host_byte_order;
 
     /**
      * @async_page_flip: Does this device support async flips on the primary
      * plane?
      */
     bool async_page_flip;
 
     /**
      * @fb_modifiers_not_supported:
      *
      * When this flag is set, the DRM device will not expose modifier
      * support to userspace. This is only used by legacy drivers that infer
      * the buffer layout through heuristics without using modifiers. New
      * drivers shall not set fhis flag.
      */
     bool fb_modifiers_not_supported;
 
     /**
      * @normalize_zpos:
      *
      * If true the drm core will call drm_atomic_normalize_zpos() as part of
      * atomic mode checking from drm_atomic_helper_check()
      */
     bool normalize_zpos;
 
     /**
      * @modifiers_property: Plane property to list support modifier/format
      * combination.
      */
     struct drm_property *modifiers_property;
 
     /* cursor size */
     uint32_t cursor_width, cursor_height;
 
     /**
      * @suspend_state:
      *
      * Atomic state when suspended.
      * Set by drm_mode_config_helper_suspend() and cleared by
      * drm_mode_config_helper_resume().
      */
     struct drm_atomic_state *suspend_state;
 
     const struct drm_mode_config_helper_funcs *helper_private;
 };
 
 int __must_check drmm_mode_config_init(struct drm_device *dev);
 
 /**
  * drm_mode_config_init - DRM mode_configuration structure initialization
  * @dev: DRM device
  *
  * This is the unmanaged version of drmm_mode_config_init() for drivers which
  * still explicitly call drm_mode_config_cleanup().
  *
  * FIXME: This function is deprecated and drivers should be converted over to
  * drmm_mode_config_init().
  */
 static inline int drm_mode_config_init(struct drm_device *dev)
 {
     return drmm_mode_config_init(dev);
 }
 
 void drm_mode_config_reset(struct drm_device *dev);
 void drm_mode_config_cleanup(struct drm_device *dev);
 
 #endif

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