FreeBSD/Linux Kernel Cross Reference
sys/dev/drm2/drm_crtc.h

     /*
      * Copyright © 2006 Keith Packard
      * Copyright © 2007-2008 Dave Airlie
      * Copyright © 2007-2008 Intel Corporation
      *   Jesse Barnes <jesse.barnes@intel.com>
      *
      * Permission is hereby granted, free of charge, to any person obtaining a
      * copy of this software and associated documentation files (the "Software"),
      * to deal in the Software without restriction, including without limitation
     * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     * and/or sell copies of the Software, and to permit persons to whom the
     * Software is furnished to do so, subject to the following conditions:
     *
     * The above copyright notice and this permission notice shall be included in
     * all copies or substantial portions of the Software.
     *
     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     * OTHER DEALINGS IN THE SOFTWARE.
     *
     * $FreeBSD$
     */
    #ifndef __DRM_CRTC_H__
    #define __DRM_CRTC_H__
    
    #include <dev/drm2/drm_mode.h>
    
    #include <dev/drm2/drm_fourcc.h>
    
    struct drm_device;
    struct drm_mode_set;
    struct drm_framebuffer;
    struct drm_object_properties;
    
    
    #define DRM_MODE_OBJECT_CRTC 0xcccccccc
    #define DRM_MODE_OBJECT_CONNECTOR 0xc0c0c0c0
    #define DRM_MODE_OBJECT_ENCODER 0xe0e0e0e0
    #define DRM_MODE_OBJECT_MODE 0xdededede
    #define DRM_MODE_OBJECT_PROPERTY 0xb0b0b0b0
    #define DRM_MODE_OBJECT_FB 0xfbfbfbfb
    #define DRM_MODE_OBJECT_BLOB 0xbbbbbbbb
    #define DRM_MODE_OBJECT_PLANE 0xeeeeeeee
    
    struct drm_mode_object {
            uint32_t id;
            uint32_t type;
            struct drm_object_properties *properties;
    };
    
    #define DRM_OBJECT_MAX_PROPERTY 24
    struct drm_object_properties {
            int count;
            uint32_t ids[DRM_OBJECT_MAX_PROPERTY];
            uint64_t values[DRM_OBJECT_MAX_PROPERTY];
    };
    
    /*
     * Note on terminology:  here, for brevity and convenience, we refer to connector
     * control chips as 'CRTCs'.  They can control any type of connector, VGA, LVDS,
     * DVI, etc.  And 'screen' refers to the whole of the visible display, which
     * may span multiple monitors (and therefore multiple CRTC and connector
     * structures).
     */
    
    enum drm_mode_status {
        MODE_OK     = 0,    /* Mode OK */
        MODE_HSYNC,         /* hsync out of range */
        MODE_VSYNC,         /* vsync out of range */
        MODE_H_ILLEGAL,     /* mode has illegal horizontal timings */
        MODE_V_ILLEGAL,     /* mode has illegal horizontal timings */
        MODE_BAD_WIDTH,     /* requires an unsupported linepitch */
        MODE_NOMODE,        /* no mode with a matching name */
        MODE_NO_INTERLACE,  /* interlaced mode not supported */
        MODE_NO_DBLESCAN,   /* doublescan mode not supported */
        MODE_NO_VSCAN,      /* multiscan mode not supported */
        MODE_MEM,           /* insufficient video memory */
        MODE_VIRTUAL_X,     /* mode width too large for specified virtual size */
        MODE_VIRTUAL_Y,     /* mode height too large for specified virtual size */
        MODE_MEM_VIRT,      /* insufficient video memory given virtual size */
        MODE_NOCLOCK,       /* no fixed clock available */
        MODE_CLOCK_HIGH,    /* clock required is too high */
        MODE_CLOCK_LOW,     /* clock required is too low */
        MODE_CLOCK_RANGE,   /* clock/mode isn't in a ClockRange */
        MODE_BAD_HVALUE,    /* horizontal timing was out of range */
        MODE_BAD_VVALUE,    /* vertical timing was out of range */
        MODE_BAD_VSCAN,     /* VScan value out of range */
        MODE_HSYNC_NARROW,  /* horizontal sync too narrow */
        MODE_HSYNC_WIDE,    /* horizontal sync too wide */
        MODE_HBLANK_NARROW, /* horizontal blanking too narrow */
        MODE_HBLANK_WIDE,   /* horizontal blanking too wide */
        MODE_VSYNC_NARROW,  /* vertical sync too narrow */
        MODE_VSYNC_WIDE,    /* vertical sync too wide */
        MODE_VBLANK_NARROW, /* vertical blanking too narrow */
        MODE_VBLANK_WIDE,   /* vertical blanking too wide */
       MODE_PANEL,         /* exceeds panel dimensions */
       MODE_INTERLACE_WIDTH, /* width too large for interlaced mode */
       MODE_ONE_WIDTH,     /* only one width is supported */
       MODE_ONE_HEIGHT,    /* only one height is supported */
       MODE_ONE_SIZE,      /* only one resolution is supported */
       MODE_NO_REDUCED,    /* monitor doesn't accept reduced blanking */
       MODE_UNVERIFIED = -3, /* mode needs to reverified */
       MODE_BAD = -2,      /* unspecified reason */
       MODE_ERROR  = -1    /* error condition */
   };
   
   #define DRM_MODE_TYPE_CLOCK_CRTC_C (DRM_MODE_TYPE_CLOCK_C | \
                                       DRM_MODE_TYPE_CRTC_C)
   
   #define DRM_MODE(nm, t, c, hd, hss, hse, ht, hsk, vd, vss, vse, vt, vs, f) \
           .name = nm, .status = 0, .type = (t), .clock = (c), \
           .hdisplay = (hd), .hsync_start = (hss), .hsync_end = (hse), \
           .htotal = (ht), .hskew = (hsk), .vdisplay = (vd), \
           .vsync_start = (vss), .vsync_end = (vse), .vtotal = (vt), \
           .vscan = (vs), .flags = (f), .vrefresh = 0, \
           .base.type = DRM_MODE_OBJECT_MODE
   
   #define CRTC_INTERLACE_HALVE_V 0x1 /* halve V values for interlacing */
   
   struct drm_display_mode {
           /* Header */
           struct list_head head;
           struct drm_mode_object base;
   
           char name[DRM_DISPLAY_MODE_LEN];
   
           enum drm_mode_status status;
           unsigned int type;
   
           /* Proposed mode values */
           int clock;              /* in kHz */
           int hdisplay;
           int hsync_start;
           int hsync_end;
           int htotal;
           int hskew;
           int vdisplay;
           int vsync_start;
           int vsync_end;
           int vtotal;
           int vscan;
           unsigned int flags;
   
           /* Addressable image size (may be 0 for projectors, etc.) */
           int width_mm;
           int height_mm;
   
           /* Actual mode we give to hw */
           int clock_index;
           int synth_clock;
           int crtc_hdisplay;
           int crtc_hblank_start;
           int crtc_hblank_end;
           int crtc_hsync_start;
           int crtc_hsync_end;
           int crtc_htotal;
           int crtc_hskew;
           int crtc_vdisplay;
           int crtc_vblank_start;
           int crtc_vblank_end;
           int crtc_vsync_start;
           int crtc_vsync_end;
           int crtc_vtotal;
   
           /* Driver private mode info */
           int private_size;
           int *private;
           int private_flags;
   
           int vrefresh;           /* in Hz */
           int hsync;              /* in kHz */
   };
   
   enum drm_connector_status {
           connector_status_connected = 1,
           connector_status_disconnected = 2,
           connector_status_unknown = 3,
   };
   
   enum subpixel_order {
           SubPixelUnknown = 0,
           SubPixelHorizontalRGB,
           SubPixelHorizontalBGR,
           SubPixelVerticalRGB,
           SubPixelVerticalBGR,
           SubPixelNone,
   };
   
   #define DRM_COLOR_FORMAT_RGB444         (1<<0)
   #define DRM_COLOR_FORMAT_YCRCB444       (1<<1)
   #define DRM_COLOR_FORMAT_YCRCB422       (1<<2)
   /*
    * Describes a given display (e.g. CRT or flat panel) and its limitations.
    */
   struct drm_display_info {
           char name[DRM_DISPLAY_INFO_LEN];
   
           /* Physical size */
           unsigned int width_mm;
           unsigned int height_mm;
   
           /* Clock limits FIXME: storage format */
           unsigned int min_vfreq, max_vfreq;
           unsigned int min_hfreq, max_hfreq;
           unsigned int pixel_clock;
           unsigned int bpc;
   
           enum subpixel_order subpixel_order;
           u32 color_formats;
   
           u8 cea_rev;
   };
   
   struct drm_framebuffer_funcs {
           /* note: use drm_framebuffer_remove() */
           void (*destroy)(struct drm_framebuffer *framebuffer);
           int (*create_handle)(struct drm_framebuffer *fb,
                                struct drm_file *file_priv,
                                unsigned int *handle);
           /**
            * Optinal callback for the dirty fb ioctl.
            *
            * Userspace can notify the driver via this callback
            * that a area of the framebuffer has changed and should
            * be flushed to the display hardware.
            *
            * See documentation in drm_mode.h for the struct
            * drm_mode_fb_dirty_cmd for more information as all
            * the semantics and arguments have a one to one mapping
            * on this function.
            */
           int (*dirty)(struct drm_framebuffer *framebuffer,
                        struct drm_file *file_priv, unsigned flags,
                        unsigned color, struct drm_clip_rect *clips,
                        unsigned num_clips);
   };
   
   struct drm_framebuffer {
           struct drm_device *dev;
           /*
            * Note that the fb is refcounted for the benefit of driver internals,
            * for example some hw, disabling a CRTC/plane is asynchronous, and
            * scanout does not actually complete until the next vblank.  So some
            * cleanup (like releasing the reference(s) on the backing GEM bo(s))
            * should be deferred.  In cases like this, the driver would like to
            * hold a ref to the fb even though it has already been removed from
            * userspace perspective.
            */
           unsigned int refcount;
           struct list_head head;
           struct drm_mode_object base;
           const struct drm_framebuffer_funcs *funcs;
           unsigned int pitches[4];
           unsigned int offsets[4];
           unsigned int width;
           unsigned int height;
           /* depth can be 15 or 16 */
           unsigned int depth;
           int bits_per_pixel;
           int flags;
           uint32_t pixel_format; /* fourcc format */
           struct list_head filp_head;
           /* if you are using the helper */
           void *helper_private;
   };
   
   struct drm_property_blob {
           struct drm_mode_object base;
           struct list_head head;
           unsigned int length;
           unsigned char data[];
   };
   
   struct drm_property_enum {
           uint64_t value;
           struct list_head head;
           char name[DRM_PROP_NAME_LEN];
   };
   
   struct drm_property {
           struct list_head head;
           struct drm_mode_object base;
           uint32_t flags;
           char name[DRM_PROP_NAME_LEN];
           uint32_t num_values;
           uint64_t *values;
   
           struct list_head enum_blob_list;
   };
   
   struct drm_crtc;
   struct drm_connector;
   struct drm_encoder;
   struct drm_pending_vblank_event;
   struct drm_plane;
   
   /**
    * drm_crtc_funcs - control CRTCs for a given device
    * @save: save CRTC state
    * @restore: restore CRTC state
    * @reset: reset CRTC after state has been invalidate (e.g. resume)
    * @cursor_set: setup the cursor
    * @cursor_move: move the cursor
    * @gamma_set: specify color ramp for CRTC
    * @destroy: deinit and free object
    * @set_property: called when a property is changed
    * @set_config: apply a new CRTC configuration
    * @page_flip: initiate a page flip
    *
    * The drm_crtc_funcs structure is the central CRTC management structure
    * in the DRM.  Each CRTC controls one or more connectors (note that the name
    * CRTC is simply historical, a CRTC may control LVDS, VGA, DVI, TV out, etc.
    * connectors, not just CRTs).
    *
    * Each driver is responsible for filling out this structure at startup time,
    * in addition to providing other modesetting features, like i2c and DDC
    * bus accessors.
    */
   struct drm_crtc_funcs {
           /* Save CRTC state */
           void (*save)(struct drm_crtc *crtc); /* suspend? */
           /* Restore CRTC state */
           void (*restore)(struct drm_crtc *crtc); /* resume? */
           /* Reset CRTC state */
           void (*reset)(struct drm_crtc *crtc);
   
           /* cursor controls */
           int (*cursor_set)(struct drm_crtc *crtc, struct drm_file *file_priv,
                             uint32_t handle, uint32_t width, uint32_t height);
           int (*cursor_move)(struct drm_crtc *crtc, int x, int y);
   
           /* Set gamma on the CRTC */
           void (*gamma_set)(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
                             uint32_t start, uint32_t size);
           /* Object destroy routine */
           void (*destroy)(struct drm_crtc *crtc);
   
           int (*set_config)(struct drm_mode_set *set);
   
           /*
            * Flip to the given framebuffer.  This implements the page
            * flip ioctl described in drm_mode.h, specifically, the
            * implementation must return immediately and block all
            * rendering to the current fb until the flip has completed.
            * If userspace set the event flag in the ioctl, the event
            * argument will point to an event to send back when the flip
            * completes, otherwise it will be NULL.
            */
           int (*page_flip)(struct drm_crtc *crtc,
                            struct drm_framebuffer *fb,
                            struct drm_pending_vblank_event *event);
   
           int (*set_property)(struct drm_crtc *crtc,
                               struct drm_property *property, uint64_t val);
   };
   
   /**
    * drm_crtc - central CRTC control structure
    * @dev: parent DRM device
    * @head: list management
    * @base: base KMS object for ID tracking etc.
    * @enabled: is this CRTC enabled?
    * @mode: current mode timings
    * @hwmode: mode timings as programmed to hw regs
    * @invert_dimensions: for purposes of error checking crtc vs fb sizes,
    *    invert the width/height of the crtc.  This is used if the driver
    *    is performing 90 or 270 degree rotated scanout
    * @x: x position on screen
    * @y: y position on screen
    * @funcs: CRTC control functions
    * @gamma_size: size of gamma ramp
    * @gamma_store: gamma ramp values
    * @framedur_ns: precise frame timing
    * @framedur_ns: precise line timing
    * @pixeldur_ns: precise pixel timing
    * @helper_private: mid-layer private data
    * @properties: property tracking for this CRTC
    *
    * Each CRTC may have one or more connectors associated with it.  This structure
    * allows the CRTC to be controlled.
    */
   struct drm_crtc {
           struct drm_device *dev;
           struct list_head head;
   
           struct drm_mode_object base;
   
           /* framebuffer the connector is currently bound to */
           struct drm_framebuffer *fb;
   
           bool enabled;
   
           /* Requested mode from modesetting. */
           struct drm_display_mode mode;
   
           /* Programmed mode in hw, after adjustments for encoders,
            * crtc, panel scaling etc. Needed for timestamping etc.
            */
           struct drm_display_mode hwmode;
   
           bool invert_dimensions;
   
           int x, y;
           const struct drm_crtc_funcs *funcs;
   
           /* CRTC gamma size for reporting to userspace */
           uint32_t gamma_size;
           uint16_t *gamma_store;
   
           /* Constants needed for precise vblank and swap timestamping. */
           s64 framedur_ns, linedur_ns, pixeldur_ns;
   
           /* if you are using the helper */
           void *helper_private;
   
           struct drm_object_properties properties;
   };
   
   
   /**
    * drm_connector_funcs - control connectors on a given device
    * @dpms: set power state (see drm_crtc_funcs above)
    * @save: save connector state
    * @restore: restore connector state
    * @reset: reset connector after state has been invalidate (e.g. resume)
    * @detect: is this connector active?
    * @fill_modes: fill mode list for this connector
    * @set_property: property for this connector may need update
    * @destroy: make object go away
    * @force: notify the driver the connector is forced on
    *
    * Each CRTC may have one or more connectors attached to it.  The functions
    * below allow the core DRM code to control connectors, enumerate available modes,
    * etc.
    */
   struct drm_connector_funcs {
           void (*dpms)(struct drm_connector *connector, int mode);
           void (*save)(struct drm_connector *connector);
           void (*restore)(struct drm_connector *connector);
           void (*reset)(struct drm_connector *connector);
   
           /* Check to see if anything is attached to the connector.
            * @force is set to false whilst polling, true when checking the
            * connector due to user request. @force can be used by the driver
            * to avoid expensive, destructive operations during automated
            * probing.
            */
           enum drm_connector_status (*detect)(struct drm_connector *connector,
                                               bool force);
           int (*fill_modes)(struct drm_connector *connector, uint32_t max_width, uint32_t max_height);
           int (*set_property)(struct drm_connector *connector, struct drm_property *property,
                                uint64_t val);
           void (*destroy)(struct drm_connector *connector);
           void (*force)(struct drm_connector *connector);
   };
   
   /**
    * drm_encoder_funcs - encoder controls
    * @reset: reset state (e.g. at init or resume time)
    * @destroy: cleanup and free associated data
    *
    * Encoders sit between CRTCs and connectors.
    */
   struct drm_encoder_funcs {
           void (*reset)(struct drm_encoder *encoder);
           void (*destroy)(struct drm_encoder *encoder);
   };
   
   #define DRM_CONNECTOR_MAX_UMODES 16
   #define DRM_CONNECTOR_LEN 32
   #define DRM_CONNECTOR_MAX_ENCODER 3
   
   /**
    * drm_encoder - central DRM encoder structure
    * @dev: parent DRM device
    * @head: list management
    * @base: base KMS object
    * @encoder_type: one of the %DRM_MODE_ENCODER_<foo> types in drm_mode.h
    * @possible_crtcs: bitmask of potential CRTC bindings
    * @possible_clones: bitmask of potential sibling encoders for cloning
    * @crtc: currently bound CRTC
    * @funcs: control functions
    * @helper_private: mid-layer private data
    *
    * CRTCs drive pixels to encoders, which convert them into signals
    * appropriate for a given connector or set of connectors.
    */
   struct drm_encoder {
           struct drm_device *dev;
           struct list_head head;
   
           struct drm_mode_object base;
           int encoder_type;
           uint32_t possible_crtcs;
           uint32_t possible_clones;
   
           struct drm_crtc *crtc;
           const struct drm_encoder_funcs *funcs;
           void *helper_private;
   };
   
   enum drm_connector_force {
           DRM_FORCE_UNSPECIFIED,
           DRM_FORCE_OFF,
           DRM_FORCE_ON,         /* force on analog part normally */
           DRM_FORCE_ON_DIGITAL, /* for DVI-I use digital connector */
   };
   
   /* should we poll this connector for connects and disconnects */
   /* hot plug detectable */
   #define DRM_CONNECTOR_POLL_HPD (1 << 0)
   /* poll for connections */
   #define DRM_CONNECTOR_POLL_CONNECT (1 << 1)
   /* can cleanly poll for disconnections without flickering the screen */
   /* DACs should rarely do this without a lot of testing */
   #define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)
   
   #define MAX_ELD_BYTES   128
   
   /**
    * drm_connector - central DRM connector control structure
    * @dev: parent DRM device
    * @kdev: kernel device for sysfs attributes
    * @attr: sysfs attributes
    * @head: list management
    * @base: base KMS object
    * @connector_type: one of the %DRM_MODE_CONNECTOR_<foo> types from drm_mode.h
    * @connector_type_id: index into connector type enum
    * @interlace_allowed: can this connector handle interlaced modes?
    * @doublescan_allowed: can this connector handle doublescan?
    * @modes: modes available on this connector (from fill_modes() + user)
    * @status: one of the drm_connector_status enums (connected, not, or unknown)
    * @probed_modes: list of modes derived directly from the display
    * @display_info: information about attached display (e.g. from EDID)
    * @funcs: connector control functions
    * @user_modes: user added mode list
    * @edid_blob_ptr: DRM property containing EDID if present
    * @properties: property tracking for this connector
    * @polled: a %DRM_CONNECTOR_POLL_<foo> value for core driven polling
    * @dpms: current dpms state
    * @helper_private: mid-layer private data
    * @force: a %DRM_FORCE_<foo> state for forced mode sets
    * @encoder_ids: valid encoders for this connector
    * @encoder: encoder driving this connector, if any
    * @eld: EDID-like data, if present
    * @dvi_dual: dual link DVI, if found
    * @max_tmds_clock: max clock rate, if found
    * @latency_present: AV delay info from ELD, if found
    * @video_latency: video latency info from ELD, if found
    * @audio_latency: audio latency info from ELD, if found
    * @null_edid_counter: track sinks that give us all zeros for the EDID
    *
    * Each connector may be connected to one or more CRTCs, or may be clonable by
    * another connector if they can share a CRTC.  Each connector also has a specific
    * position in the broader display (referred to as a 'screen' though it could
    * span multiple monitors).
    */
   struct drm_connector {
           struct drm_device *dev;
   #ifdef FREEBSD_NOTYET
           struct device kdev;
   #endif /* FREEBSD_NOTYET */
           struct device_attribute *attr;
           struct list_head head;
   
           struct drm_mode_object base;
   
           int connector_type;
           int connector_type_id;
           bool interlace_allowed;
           bool doublescan_allowed;
           struct list_head modes; /* list of modes on this connector */
   
           enum drm_connector_status status;
   
           /* these are modes added by probing with DDC or the BIOS */
           struct list_head probed_modes;
   
           struct drm_display_info display_info;
           const struct drm_connector_funcs *funcs;
   
           struct list_head user_modes;
           struct drm_property_blob *edid_blob_ptr;
           struct drm_object_properties properties;
   
           uint8_t polled; /* DRM_CONNECTOR_POLL_* */
   
           /* requested DPMS state */
           int dpms;
   
           void *helper_private;
   
           /* forced on connector */
           enum drm_connector_force force;
           uint32_t encoder_ids[DRM_CONNECTOR_MAX_ENCODER];
           struct drm_encoder *encoder; /* currently active encoder */
   
           /* EDID bits */
           uint8_t eld[MAX_ELD_BYTES];
           bool dvi_dual;
           int max_tmds_clock;     /* in MHz */
           bool latency_present[2];
           int video_latency[2];   /* [0]: progressive, [1]: interlaced */
           int audio_latency[2];
           int null_edid_counter; /* needed to workaround some HW bugs where we get all 0s */
           unsigned bad_edid_counter;
   };
   
   /**
    * drm_plane_funcs - driver plane control functions
    * @update_plane: update the plane configuration
    * @disable_plane: shut down the plane
    * @destroy: clean up plane resources
    * @set_property: called when a property is changed
    */
   struct drm_plane_funcs {
           int (*update_plane)(struct drm_plane *plane,
                               struct drm_crtc *crtc, struct drm_framebuffer *fb,
                               int crtc_x, int crtc_y,
                               unsigned int crtc_w, unsigned int crtc_h,
                               uint32_t src_x, uint32_t src_y,
                               uint32_t src_w, uint32_t src_h);
           int (*disable_plane)(struct drm_plane *plane);
           void (*destroy)(struct drm_plane *plane);
   
           int (*set_property)(struct drm_plane *plane,
                               struct drm_property *property, uint64_t val);
   };
   
   /**
    * drm_plane - central DRM plane control structure
    * @dev: DRM device this plane belongs to
    * @head: for list management
    * @base: base mode object
    * @possible_crtcs: pipes this plane can be bound to
    * @format_types: array of formats supported by this plane
    * @format_count: number of formats supported
    * @crtc: currently bound CRTC
    * @fb: currently bound fb
    * @gamma_size: size of gamma table
    * @gamma_store: gamma correction table
    * @enabled: enabled flag
    * @funcs: helper functions
    * @helper_private: storage for drver layer
    * @properties: property tracking for this plane
    */
   struct drm_plane {
           struct drm_device *dev;
           struct list_head head;
   
           struct drm_mode_object base;
   
           uint32_t possible_crtcs;
           uint32_t *format_types;
           uint32_t format_count;
   
           struct drm_crtc *crtc;
           struct drm_framebuffer *fb;
   
           /* CRTC gamma size for reporting to userspace */
           uint32_t gamma_size;
           uint16_t *gamma_store;
   
           bool enabled;
   
           const struct drm_plane_funcs *funcs;
           void *helper_private;
   
           struct drm_object_properties properties;
   };
   
   /**
    * drm_mode_set - new values for a CRTC config change
    * @head: list management
    * @fb: framebuffer to use for new config
    * @crtc: CRTC whose configuration we're about to change
    * @mode: mode timings to use
    * @x: position of this CRTC relative to @fb
    * @y: position of this CRTC relative to @fb
    * @connectors: array of connectors to drive with this CRTC if possible
    * @num_connectors: size of @connectors array
    *
    * Represents a single crtc the connectors that it drives with what mode
    * and from which framebuffer it scans out from.
    *
    * This is used to set modes.
    */
   struct drm_mode_set {
           struct drm_framebuffer *fb;
           struct drm_crtc *crtc;
           struct drm_display_mode *mode;
   
           uint32_t x;
           uint32_t y;
   
           struct drm_connector **connectors;
           size_t num_connectors;
   };
   
   /**
    * struct drm_mode_config_funcs - basic driver provided mode setting functions
    * @fb_create: create a new framebuffer object
    * @output_poll_changed: function to handle output configuration changes
    *
    * Some global (i.e. not per-CRTC, connector, etc) mode setting functions that
    * involve drivers.
    */
   struct drm_mode_config_funcs {
           int (*fb_create)(struct drm_device *dev,
                                                struct drm_file *file_priv,
                                                struct drm_mode_fb_cmd2 *mode_cmd,
                                                struct drm_framebuffer **fb);
           void (*output_poll_changed)(struct drm_device *dev);
   };
   
   /**
    * drm_mode_group - group of mode setting resources for potential sub-grouping
    * @num_crtcs: CRTC count
    * @num_encoders: encoder count
    * @num_connectors: connector count
    * @id_list: list of KMS object IDs in this group
    *
    * Currently this simply tracks the global mode setting state.  But in the
    * future it could allow groups of objects to be set aside into independent
    * control groups for use by different user level processes (e.g. two X servers
    * running simultaneously on different heads, each with their own mode
    * configuration and freedom of mode setting).
    */
   struct drm_mode_group {
           uint32_t num_crtcs;
           uint32_t num_encoders;
           uint32_t num_connectors;
   
           /* list of object IDs for this group */
           uint32_t *id_list;
   };
   
   /**
    * drm_mode_config - Mode configuration control structure
    * @mutex: mutex protecting KMS related lists and structures
    * @idr_mutex: mutex for KMS ID allocation and management
    * @crtc_idr: main KMS ID tracking object
    * @num_fb: number of fbs available
    * @fb_list: list of framebuffers available
    * @num_connector: number of connectors on this device
    * @connector_list: list of connector objects
    * @num_encoder: number of encoders on this device
    * @encoder_list: list of encoder objects
    * @num_crtc: number of CRTCs on this device
    * @crtc_list: list of CRTC objects
    * @min_width: minimum pixel width on this device
    * @min_height: minimum pixel height on this device
    * @max_width: maximum pixel width on this device
    * @max_height: maximum pixel height on this device
    * @funcs: core driver provided mode setting functions
    * @fb_base: base address of the framebuffer
    * @poll_enabled: track polling status for this device
    * @output_poll_work: delayed work for polling in process context
    * @*_property: core property tracking
    *
    * 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.
    */
   struct drm_mode_config {
           struct sx mutex; /* protects configuration (mode lists etc.) */
           struct drm_gem_names crtc_names; /* use this idr for all IDs, fb, crtc, connector, modes - just makes life easier */
           /* this is limited to one for now */
           int num_fb;
           struct list_head fb_list;
           int num_connector;
           struct list_head connector_list;
           int num_encoder;
           struct list_head encoder_list;
           int num_plane;
           struct list_head plane_list;
   
           int num_crtc;
           struct list_head crtc_list;
   
           struct list_head property_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;
           struct timeout_task output_poll_work;
   
           /* pointers to standard properties */
           struct list_head property_blob_list;
           struct drm_property *edid_property;
           struct drm_property *dpms_property;
   
           /* DVI-I properties */
           struct drm_property *dvi_i_subconnector_property;
           struct drm_property *dvi_i_select_subconnector_property;
   
           /* TV properties */
           struct drm_property *tv_subconnector_property;
           struct drm_property *tv_select_subconnector_property;
           struct drm_property *tv_mode_property;
           struct drm_property *tv_left_margin_property;
           struct drm_property *tv_right_margin_property;
           struct drm_property *tv_top_margin_property;
           struct drm_property *tv_bottom_margin_property;
           struct drm_property *tv_brightness_property;
           struct drm_property *tv_contrast_property;
           struct drm_property *tv_flicker_reduction_property;
           struct drm_property *tv_overscan_property;
           struct drm_property *tv_saturation_property;
           struct drm_property *tv_hue_property;
   
           /* Optional properties */
           struct drm_property *scaling_mode_property;
           struct drm_property *dithering_mode_property;
           struct drm_property *dirty_info_property;
   
           /* dumb ioctl parameters */
           uint32_t preferred_depth, prefer_shadow;
   };
   
   #define obj_to_crtc(x) container_of(x, struct drm_crtc, base)
   #define obj_to_connector(x) container_of(x, struct drm_connector, base)
   #define obj_to_encoder(x) container_of(x, struct drm_encoder, base)
   #define obj_to_mode(x) container_of(x, struct drm_display_mode, base)
   #define obj_to_fb(x) container_of(x, struct drm_framebuffer, base)
   #define obj_to_property(x) container_of(x, struct drm_property, base)
   #define obj_to_blob(x) container_of(x, struct drm_property_blob, base)
   #define obj_to_plane(x) container_of(x, struct drm_plane, base)
   
   struct drm_prop_enum_list {
           int type;
           char *name;
   };
   
   extern int drm_crtc_init(struct drm_device *dev,
                            struct drm_crtc *crtc,
                            const struct drm_crtc_funcs *funcs);
   extern void drm_crtc_cleanup(struct drm_crtc *crtc);
   
   extern int drm_connector_init(struct drm_device *dev,
                                 struct drm_connector *connector,
                                 const struct drm_connector_funcs *funcs,
                                 int connector_type);
   
   extern void drm_connector_cleanup(struct drm_connector *connector);
   /* helper to unplug all connectors from sysfs for device */
   extern void drm_connector_unplug_all(struct drm_device *dev);
   
   extern int drm_encoder_init(struct drm_device *dev,
                               struct drm_encoder *encoder,
                               const struct drm_encoder_funcs *funcs,
                               int encoder_type);
   
   extern int drm_plane_init(struct drm_device *dev,
                             struct drm_plane *plane,
                             unsigned long possible_crtcs,
                             const struct drm_plane_funcs *funcs,
                             const uint32_t *formats, uint32_t format_count,
                             bool priv);
   extern void drm_plane_cleanup(struct drm_plane *plane);
   
   extern void drm_encoder_cleanup(struct drm_encoder *encoder);
   
   extern char *drm_get_connector_name(struct drm_connector *connector);
   extern char *drm_get_connector_status_name(enum drm_connector_status status);
   extern char *drm_get_dpms_name(int val);
   extern char *drm_get_dvi_i_subconnector_name(int val);
   extern char *drm_get_dvi_i_select_name(int val);
   extern char *drm_get_tv_subconnector_name(int val);
   extern char *drm_get_dirty_info_name(int val);
   extern char *drm_get_tv_select_name(int val);
   extern void drm_fb_release(struct drm_file *file_priv);
   extern int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group);
   extern void drm_mode_group_free(struct drm_mode_group *group);
   extern int drm_mode_group_init_legacy_group(struct drm_device *dev, struct drm_mode_group *group);
   extern bool drm_probe_ddc(device_t adapter);
   extern struct edid *drm_get_edid(struct drm_connector *connector,
                                    device_t adapter);
   extern int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
   extern void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode);
   extern void drm_mode_remove(struct drm_connector *connector, struct drm_display_mode *mode);
   extern void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src);
   extern struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
                                                      const struct drm_display_mode *mode);
   extern void drm_mode_debug_printmodeline(const struct drm_display_mode *mode);
   extern void drm_mode_config_init(struct drm_device *dev);
   extern void drm_mode_config_reset(struct drm_device *dev);
   extern void drm_mode_config_cleanup(struct drm_device *dev);
   extern void drm_mode_set_name(struct drm_display_mode *mode);
   extern bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2);
   extern int drm_mode_width(const struct drm_display_mode *mode);
   extern int drm_mode_height(const struct drm_display_mode *mode);
   
   /* for us by fb module */
   extern int drm_mode_attachmode_crtc(struct drm_device *dev,
                                       struct drm_crtc *crtc,
                                       const struct drm_display_mode *mode);
   extern int drm_mode_detachmode_crtc(struct drm_device *dev, struct drm_display_mode *mode);
   
   extern struct drm_display_mode *drm_mode_create(struct drm_device *dev);
   extern void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode);
   extern void drm_mode_list_concat(struct list_head *head,
                                    struct list_head *new);
   extern void drm_mode_validate_size(struct drm_device *dev,
                                      struct list_head *mode_list,
                                      int maxX, int maxY, int maxPitch);
   extern void drm_mode_validate_clocks(struct drm_device *dev,
                                        struct list_head *mode_list,
                                        int *min, int *max, int n_ranges);
   extern void drm_mode_prune_invalid(struct drm_device *dev,
                                      struct list_head *mode_list, bool verbose);
   extern void drm_mode_sort(struct list_head *mode_list);
   extern int drm_mode_hsync(const struct drm_display_mode *mode);
   extern int drm_mode_vrefresh(const struct drm_display_mode *mode);
   extern void drm_mode_set_crtcinfo(struct drm_display_mode *p,
                                     int adjust_flags);
   extern void drm_mode_connector_list_update(struct drm_connector *connector);
   extern int drm_mode_connector_update_edid_property(struct drm_connector *connector,
                                                   struct edid *edid);
   extern int drm_object_property_set_value(struct drm_mode_object *obj,
                                            struct drm_property *property,
                                            uint64_t val);
   extern int drm_object_property_get_value(struct drm_mode_object *obj,
                                            struct drm_property *property,
                                            uint64_t *value);
   extern struct drm_display_mode *drm_crtc_mode_create(struct drm_device *dev);
   extern void drm_framebuffer_set_object(struct drm_device *dev,
                                          unsigned long handle);
   extern int drm_framebuffer_init(struct drm_device *dev,
                                   struct drm_framebuffer *fb,
                                   const struct drm_framebuffer_funcs *funcs);
   extern void drm_framebuffer_unreference(struct drm_framebuffer *fb);
   extern void drm_framebuffer_reference(struct drm_framebuffer *fb);
   extern void drm_framebuffer_remove(struct drm_framebuffer *fb);
   extern void drm_framebuffer_cleanup(struct drm_framebuffer *fb);
   extern int drmfb_probe(struct drm_device *dev, struct drm_crtc *crtc);
   extern int drmfb_remove(struct drm_device *dev, struct drm_framebuffer *fb);
   extern void drm_crtc_probe_connector_modes(struct drm_device *dev, int maxX, int maxY);
   extern bool drm_crtc_in_use(struct drm_crtc *crtc);
   
   extern void drm_object_attach_property(struct drm_mode_object *obj,
                                          struct drm_property *property,
                                          uint64_t init_val);
   extern struct drm_property *drm_property_create(struct drm_device *dev, int flags,
                                                   const char *name, int num_values);
   extern struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
                                            const char *name,
                                            const struct drm_prop_enum_list *props,
                                            int num_values);
   struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
                                            int flags, const char *name,
                                            const struct drm_prop_enum_list *props,
                                            int num_values);
   struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
                                            const char *name,
                                            uint64_t min, uint64_t max);
   extern void drm_property_destroy(struct drm_device *dev, struct drm_property *property);
   extern int drm_property_add_enum(struct drm_property *property, int index,
                                    uint64_t value, const char *name);
   extern int drm_mode_create_dvi_i_properties(struct drm_device *dev);
   extern int drm_mode_create_tv_properties(struct drm_device *dev, int num_formats,
                                        char *formats[]);
   extern int drm_mode_create_scaling_mode_property(struct drm_device *dev);
   extern int drm_mode_create_dithering_property(struct drm_device *dev);
   extern int drm_mode_create_dirty_info_property(struct drm_device *dev);
   extern char *drm_get_encoder_name(struct drm_encoder *encoder);
   
   extern int drm_mode_connector_attach_encoder(struct drm_connector *connector,
                                                struct drm_encoder *encoder);
   extern void drm_mode_connector_detach_encoder(struct drm_connector *connector,
                                              struct drm_encoder *encoder);
   extern int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
                                            int gamma_size);
   extern struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
                   uint32_t id, uint32_t type);
   /* IOCTLs */
   extern int drm_mode_getresources(struct drm_device *dev,
                                    void *data, struct drm_file *file_priv);
   extern int drm_mode_getplane_res(struct drm_device *dev, void *data,
                                      struct drm_file *file_priv);
   extern int drm_mode_getcrtc(struct drm_device *dev,
                               void *data, struct drm_file *file_priv);
   extern int drm_mode_getconnector(struct drm_device *dev,
                                 void *data, struct drm_file *file_priv);
   extern int drm_mode_setcrtc(struct drm_device *dev,
                               void *data, struct drm_file *file_priv);
   extern int drm_mode_getplane(struct drm_device *dev,
                                  void *data, struct drm_file *file_priv);
   extern int drm_mode_setplane(struct drm_device *dev,
                                  void *data, struct drm_file *file_priv);
  extern int drm_mode_cursor_ioctl(struct drm_device *dev,
                                  void *data, struct drm_file *file_priv);
  extern int drm_mode_addfb(struct drm_device *dev,
                            void *data, struct drm_file *file_priv);
  extern int drm_mode_addfb2(struct drm_device *dev,
                             void *data, struct drm_file *file_priv);
  extern uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth);
  extern int drm_mode_rmfb(struct drm_device *dev,
                           void *data, struct drm_file *file_priv);
  extern int drm_mode_getfb(struct drm_device *dev,
                            void *data, struct drm_file *file_priv);
  extern int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
                                    void *data, struct drm_file *file_priv);
  extern int drm_mode_addmode_ioctl(struct drm_device *dev,
                                    void *data, struct drm_file *file_priv);
  extern int drm_mode_rmmode_ioctl(struct drm_device *dev,
                                   void *data, struct drm_file *file_priv);
  extern int drm_mode_attachmode_ioctl(struct drm_device *dev,
                                       void *data, struct drm_file *file_priv);
  extern int drm_mode_detachmode_ioctl(struct drm_device *dev,
                                       void *data, struct drm_file *file_priv);
  
  extern int drm_mode_getproperty_ioctl(struct drm_device *dev,
                                        void *data, struct drm_file *file_priv);
  extern int drm_mode_getblob_ioctl(struct drm_device *dev,
                                    void *data, struct drm_file *file_priv);
  extern int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
                                                void *data, struct drm_file *file_priv);
  extern int drm_mode_hotplug_ioctl(struct drm_device *dev,
                                    void *data, struct drm_file *file_priv);
  extern int drm_mode_replacefb(struct drm_device *dev,
                                void *data, struct drm_file *file_priv);
  extern int drm_mode_getencoder(struct drm_device *dev,
                                 void *data, struct drm_file *file_priv);
  extern int drm_mode_gamma_get_ioctl(struct drm_device *dev,
                                      void *data, struct drm_file *file_priv);
  extern int drm_mode_gamma_set_ioctl(struct drm_device *dev,
                                      void *data, struct drm_file *file_priv);
  extern u8 *drm_find_cea_extension(struct edid *edid);
  extern u8 drm_match_cea_mode(struct drm_display_mode *to_match);
  extern bool drm_detect_hdmi_monitor(struct edid *edid);
  extern bool drm_detect_monitor_audio(struct edid *edid);
  extern int drm_mode_page_flip_ioctl(struct drm_device *dev,
                                      void *data, struct drm_file *file_priv);
  extern struct drm_display_mode *drm_cvt_mode(struct drm_device *dev,
                                  int hdisplay, int vdisplay, int vrefresh,
                                  bool reduced, bool interlaced, bool margins);
  extern struct drm_display_mode *drm_gtf_mode(struct drm_device *dev,
                                  int hdisplay, int vdisplay, int vrefresh,
                                  bool interlaced, int margins);
  extern struct drm_display_mode *drm_gtf_mode_complex(struct drm_device *dev,
                                  int hdisplay, int vdisplay, int vrefresh,
                                  bool interlaced, int margins, int GTF_M,
                                  int GTF_2C, int GTF_K, int GTF_2J);
  extern int drm_add_modes_noedid(struct drm_connector *connector,
                                  int hdisplay, int vdisplay);
  extern uint8_t drm_mode_cea_vic(const struct drm_display_mode *mode);
  
  extern int drm_edid_header_is_valid(const u8 *raw_edid);
  extern bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid);
  extern bool drm_edid_is_valid(struct edid *edid);
  struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
                                             int hsize, int vsize, int fresh,
                                             bool rb);
  
  extern int drm_mode_create_dumb_ioctl(struct drm_device *dev,
                                        void *data, struct drm_file *file_priv);
  extern int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
                                      void *data, struct drm_file *file_priv);
  extern int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
                                        void *data, struct drm_file *file_priv);
  extern int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
                                               struct drm_file *file_priv);
  extern int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
                                             struct drm_file *file_priv);
  
  extern void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
                                   int *bpp);
  extern int drm_format_num_planes(uint32_t format);
  extern int drm_format_plane_cpp(uint32_t format, int plane);
  extern int drm_format_horz_chroma_subsampling(uint32_t format);
  extern int drm_format_vert_chroma_subsampling(uint32_t format);
  
  #endif /* __DRM_CRTC_H__ */

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