blob: 3c1924c010e8c3a2898bbb908f778b1ebed27bf4 [file] [log] [blame]
* Copyright © 2006 Keith Packard
* Copyright © 2007-2008 Dave Airlie
* Copyright © 2007-2008 Intel Corporation
* Jesse Barnes <>
* 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.
#ifndef __DRM_CRTC_H__
#define __DRM_CRTC_H__
#include <linux/i2c.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/idr.h>
#include <linux/fb.h>
struct drm_device;
struct drm_mode_set;
struct drm_framebuffer;
#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
struct drm_mode_object {
uint32_t id;
uint32_t type;
* 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 maching 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(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
#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;
int connector_count;
enum drm_mode_status status;
int type;
/* Proposed mode values */
int clock;
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;
int crtc_hadjusted;
int crtc_vadjusted;
/* Driver private mode info */
int private_size;
int *private;
int private_flags;
int vrefresh;
float hsync;
enum drm_connector_status {
connector_status_connected = 1,
connector_status_disconnected = 2,
connector_status_unknown = 3,
enum subpixel_order {
SubPixelUnknown = 0,
* Describes a given display (e.g. CRT or flat panel) and its limitations.
struct drm_display_info {
/* Input info */
bool serration_vsync;
bool sync_on_green;
bool composite_sync;
bool separate_syncs;
bool blank_to_black;
unsigned char video_level;
bool digital;
/* Physical size */
unsigned int width_mm;
unsigned int height_mm;
/* Display parameters */
unsigned char gamma; /* FIXME: storage format */
bool gtf_supported;
bool standard_color;
enum {
monochrome = 0,
} display_type;
bool active_off_supported;
bool suspend_supported;
bool standby_supported;
/* Color info FIXME: storage format */
unsigned short redx, redy;
unsigned short greenx, greeny;
unsigned short bluex, bluey;
unsigned short whitex, whitey;
/* Clock limits FIXME: storage format */
unsigned int min_vfreq, max_vfreq;
unsigned int min_hfreq, max_hfreq;
unsigned int pixel_clock;
/* White point indices FIXME: storage format */
unsigned int wpx1, wpy1;
unsigned int wpgamma1;
unsigned int wpx2, wpy2;
unsigned int wpgamma2;
enum subpixel_order subpixel_order;
char *raw_edid; /* if any */
struct drm_framebuffer_funcs {
void (*destroy)(struct drm_framebuffer *framebuffer);
int (*create_handle)(struct drm_framebuffer *fb,
struct drm_file *file_priv,
unsigned int *handle);
struct drm_framebuffer {
struct drm_device *dev;
struct list_head head;
struct drm_mode_object base;
const struct drm_framebuffer_funcs *funcs;
unsigned int pitch;
unsigned int width;
unsigned int height;
/* depth can be 15 or 16 */
unsigned int depth;
int bits_per_pixel;
int flags;
void *fbdev;
u32 pseudo_palette[17];
struct list_head filp_head;
struct drm_property_blob {
struct drm_mode_object base;
struct list_head head;
unsigned int length;
void *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;
* drm_crtc_funcs - control CRTCs for a given device
* @dpms: control display power levels
* @save: save CRTC state
* @resore: restore CRTC state
* @lock: lock the CRTC
* @unlock: unlock the CRTC
* @shadow_allocate: allocate shadow pixmap
* @shadow_create: create shadow pixmap for rotation support
* @shadow_destroy: free shadow pixmap
* @mode_fixup: fixup proposed mode
* @mode_set: set the desired mode on the CRTC
* @gamma_set: specify color ramp for CRTC
* @destroy: deinit and free object.
* 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? */
/* 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 size);
/* Object destroy routine */
void (*destroy)(struct drm_crtc *crtc);
int (*set_config)(struct drm_mode_set *set);
* drm_crtc - central CRTC control structure
* @enabled: is this CRTC enabled?
* @x: x position on screen
* @y: y position on screen
* @desired_mode: new desired mode
* @desired_x: desired x for desired_mode
* @desired_y: desired y for desired_mode
* @funcs: CRTC control functions
* 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;
struct drm_display_mode mode;
int x, y;
struct drm_display_mode *desired_mode;
int desired_x, desired_y;
const struct drm_crtc_funcs *funcs;
/* CRTC gamma size for reporting to userspace */
uint32_t gamma_size;
uint16_t *gamma_store;
/* if you are using the helper */
void *helper_private;
* 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
* @mode_valid: is this mode valid on the given connector?
* @mode_fixup: try to fixup proposed mode for this connector
* @mode_set: set this mode
* @detect: is this connector active?
* @get_modes: get mode list for this connector
* @set_property: property for this connector may need update
* @destroy: make object go away
* 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);
enum drm_connector_status (*detect)(struct drm_connector *connector);
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);
struct drm_encoder_funcs {
void (*destroy)(struct drm_encoder *encoder);
* drm_encoder - central DRM encoder structure
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;
* drm_connector - central DRM connector control structure
* @crtc: CRTC this connector is currently connected to, NULL if none
* @interlace_allowed: can this connector handle interlaced modes?
* @doublescan_allowed: can this connector handle doublescan?
* @available_modes: modes available on this connector (from get_modes() + user)
* @initial_x: initial x position for this connector
* @initial_y: initial y position for this connector
* @status: connector connected?
* @funcs: connector control functions
* 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;
struct device kdev;
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 */
int initial_x, initial_y;
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;
uint64_t property_values[DRM_CONNECTOR_MAX_PROPERTY];
void *helper_private;
uint32_t encoder_ids[DRM_CONNECTOR_MAX_ENCODER];
uint32_t force_encoder_id;
struct drm_encoder *encoder; /* currently active encoder */
* struct drm_mode_set
* 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 list_head head;
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 - configure CRTCs for a given screen layout
* @resize: adjust CRTCs as necessary for the proposed layout
* Currently only a resize hook is available. DRM will call back into the
* driver with a new screen width and height. If the driver can't support
* the proposed size, it can return false. Otherwise it should adjust
* the CRTC<->connector mappings as needed and update its view of the screen.
struct drm_mode_config_funcs {
struct drm_framebuffer *(*fb_create)(struct drm_device *dev, struct drm_file *file_priv, struct drm_mode_fb_cmd *mode_cmd);
int (*fb_changed)(struct drm_device *dev);
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
struct drm_mode_config {
struct mutex mutex; /* protects configuration (mode lists etc.) */
struct mutex idr_mutex; /* for IDR management */
struct idr crtc_idr; /* 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_crtc;
struct list_head crtc_list;
struct list_head property_list;
/* in-kernel framebuffers - hung of filp_head in drm_framebuffer */
struct list_head fb_kernel_list;
int min_width, min_height;
int max_width, max_height;
struct drm_mode_config_funcs *funcs;
resource_size_t fb_base;
/* 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;
/* Optional properties */
struct drm_property *scaling_mode_property;
struct drm_property *dithering_mode_property;
#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)
extern void 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 void 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);
extern void drm_encoder_init(struct drm_device *dev,
struct drm_encoder *encoder,
const struct drm_encoder_funcs *funcs,
int encoder_type);
extern void drm_encoder_cleanup(struct drm_encoder *encoder);
extern char *drm_get_connector_name(struct drm_connector *connector);
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_tv_select_name(int val);
extern void drm_fb_release(struct drm_file *file_priv);
extern int drm_mode_group_init_legacy_group(struct drm_device *dev, struct drm_mode_group *group);
extern struct edid *drm_get_edid(struct drm_connector *connector,
struct i2c_adapter *adapter);
extern int drm_do_probe_ddc_edid(struct i2c_adapter *adapter,
unsigned char *buf, int len);
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 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
struct drm_display_mode *mode);
extern void drm_mode_debug_printmodeline(struct drm_display_mode *mode);
extern void drm_mode_config_init(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(struct drm_display_mode *mode1, struct drm_display_mode *mode2);
extern int drm_mode_width(struct drm_display_mode *mode);
extern int drm_mode_height(struct drm_display_mode *mode);
/* for us by fb module */
extern int drm_mode_attachmode_crtc(struct drm_device *dev,
struct drm_crtc *crtc,
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_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_vrefresh(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_connector_property_set_value(struct drm_connector *connector,
struct drm_property *property,
uint64_t value);
extern int drm_connector_property_get_value(struct drm_connector *connector,
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_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 int drm_connector_attach_property(struct drm_connector *connector,
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 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 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 bool drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
int gamma_size);
extern void *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_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_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_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_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 bool drm_detect_hdmi_monitor(struct edid *edid);
#endif /* __DRM_CRTC_H__ */