drm/xf86drmMode.h

/*
 * \file xf86drmMode.h
 * Header for DRM modesetting interface.
 *
 * \author Jakob Bornecrantz <wallbraker@gmail.com>
 *
 * \par Acknowledgements:
 * Feb 2007, Dave Airlie <airlied@linux.ie>
 */

/*
 * Copyright (c) 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
 * Copyright (c) 2007-2008 Dave Airlie <airlied@linux.ie>
 * Copyright (c) 2007-2008 Jakob Bornecrantz <wallbraker@gmail.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
 * AUTHORS OR COPYRIGHT HOLDERS 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.
 *
 */

#ifndef _XF86DRMMODE_H_
#define _XF86DRMMODE_H_

#if defined(__cplusplus)
extern "C" {
#endif

#include <drm.h>
#include <drm_mode.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>

/*
 * This is the interface for modesetting for drm.
 *
 * It aims to provide a randr1.2 compatible interface for modesettings in the
 * kernel, the interface is also meant to be used by libraries like EGL.
 *
 * More information can be found in randrproto.txt which can be found here:
 * http://gitweb.freedesktop.org/?p=xorg/proto/randrproto.git
 *
 * There are some major differences to be noted. Unlike the randr1.2 proto you
 * need to create the memory object of the framebuffer yourself with the ttm
 * buffer object interface. This object needs to be pinned.
 */

/*
 * Feature defines
 *
 * Just because these are defined doesn't mean that the kernel
 * can do that feature, its just for new code vs old libdrm.
 */
#define DRM_MODE_FEATURE_KMS		1
#define DRM_MODE_FEATURE_DIRTYFB	1


typedef struct _drmModeRes {

	int count_fbs;
	uint32_t *fbs;

	int count_crtcs;
	uint32_t *crtcs;

	int count_connectors;
	uint32_t *connectors;

	int count_encoders;
	uint32_t *encoders;

	uint32_t min_width, max_width;
	uint32_t min_height, max_height;
} drmModeRes, *drmModeResPtr;

typedef struct _drmModeModeInfo {
	uint32_t clock;
	uint16_t hdisplay, hsync_start, hsync_end, htotal, hskew;
	uint16_t vdisplay, vsync_start, vsync_end, vtotal, vscan;

	uint32_t vrefresh;

	uint32_t flags;
	uint32_t type;
	char name[DRM_DISPLAY_MODE_LEN];
} drmModeModeInfo, *drmModeModeInfoPtr;

typedef struct _drmModeFB {
	uint32_t fb_id;
	uint32_t width, height;
	uint32_t pitch;
	uint32_t bpp;
	uint32_t depth;
	/* driver specific handle */
	uint32_t handle;
} drmModeFB, *drmModeFBPtr;

typedef struct _drmModeFB2 {
	uint32_t fb_id;
	uint32_t width, height;
	uint32_t pixel_format; /* fourcc code from drm_fourcc.h */
	uint64_t modifier; /* applies to all buffers */
	uint32_t flags;

	/* per-plane GEM handle; may be duplicate entries for multiple planes */
	uint32_t handles[4];
	uint32_t pitches[4]; /* bytes */
	uint32_t offsets[4]; /* bytes */
} drmModeFB2, *drmModeFB2Ptr;

typedef struct drm_clip_rect drmModeClip, *drmModeClipPtr;

typedef struct _drmModePropertyBlob {
	uint32_t id;
	uint32_t length;
	void *data;
} drmModePropertyBlobRes, *drmModePropertyBlobPtr;

typedef struct _drmModeProperty {
	uint32_t prop_id;
	uint32_t flags;
	char name[DRM_PROP_NAME_LEN];
	int count_values;
	uint64_t *values; /* store the blob lengths */
	int count_enums;
	struct drm_mode_property_enum *enums;
	int count_blobs;
	uint32_t *blob_ids; /* store the blob IDs */
} drmModePropertyRes, *drmModePropertyPtr;

static inline uint32_t drmModeGetPropertyType(const drmModePropertyRes *prop)
{
	return prop->flags & (DRM_MODE_PROP_LEGACY_TYPE | DRM_MODE_PROP_EXTENDED_TYPE);
}

static inline int drm_property_type_is(const drmModePropertyPtr property,
		uint32_t type)
{
	return drmModeGetPropertyType(property) == type;
}

typedef struct _drmModeCrtc {
	uint32_t crtc_id;
	uint32_t buffer_id; /**< FB id to connect to 0 = disconnect */

	uint32_t x, y; /**< Position on the framebuffer */
	uint32_t width, height;
	int mode_valid;
	drmModeModeInfo mode;

	int gamma_size; /**< Number of gamma stops */

} drmModeCrtc, *drmModeCrtcPtr;

typedef struct _drmModeEncoder {
	uint32_t encoder_id;
	uint32_t encoder_type;
	uint32_t crtc_id;
	uint32_t possible_crtcs;
	uint32_t possible_clones;
} drmModeEncoder, *drmModeEncoderPtr;

/**
 * Describes the connector status.
 *
 * DRM_MODE_CONNECTED means that the connector has a sink plugged in.
 * DRM_MODE_DISCONNECTED means the contrary. DRM_MODE_UNKNOWNCONNECTION is used
 * when it could be either.
 *
 * User-space should first try to enable DRM_MODE_CONNECTED connectors and
 * ignore other connectors. If there are no DRM_MODE_CONNECTED connectors,
 * user-space should then try to probe and enable DRM_MODE_UNKNOWNCONNECTION
 * connectors.
 */
typedef enum {
	DRM_MODE_CONNECTED         = 1,
	DRM_MODE_DISCONNECTED      = 2,
	DRM_MODE_UNKNOWNCONNECTION = 3
} drmModeConnection;

typedef enum {
	DRM_MODE_SUBPIXEL_UNKNOWN        = 1,
	DRM_MODE_SUBPIXEL_HORIZONTAL_RGB = 2,
	DRM_MODE_SUBPIXEL_HORIZONTAL_BGR = 3,
	DRM_MODE_SUBPIXEL_VERTICAL_RGB   = 4,
	DRM_MODE_SUBPIXEL_VERTICAL_BGR   = 5,
	DRM_MODE_SUBPIXEL_NONE           = 6
} drmModeSubPixel;

typedef struct _drmModeConnector {
	uint32_t connector_id;
	uint32_t encoder_id; /**< Encoder currently connected to */
	uint32_t connector_type;
	uint32_t connector_type_id;
	drmModeConnection connection;
	uint32_t mmWidth, mmHeight; /**< HxW in millimeters */
	drmModeSubPixel subpixel;

	int count_modes;
	drmModeModeInfoPtr modes;

	int count_props;
	uint32_t *props; /**< List of property ids */
	uint64_t *prop_values; /**< List of property values */

	int count_encoders;
	uint32_t *encoders; /**< List of encoder ids */
} drmModeConnector, *drmModeConnectorPtr;

#define DRM_PLANE_TYPE_OVERLAY 0
#define DRM_PLANE_TYPE_PRIMARY 1
#define DRM_PLANE_TYPE_CURSOR  2

typedef struct _drmModeObjectProperties {
	uint32_t count_props;
	uint32_t *props;
	uint64_t *prop_values;
} drmModeObjectProperties, *drmModeObjectPropertiesPtr;

typedef struct _drmModeFormatModifierIterator {
	uint32_t fmt_idx, mod_idx;
	uint32_t fmt;
	uint64_t mod;
} drmModeFormatModifierIterator;

typedef struct _drmModePlane {
	uint32_t count_formats;
	uint32_t *formats;
	uint32_t plane_id;

	uint32_t crtc_id;
	uint32_t fb_id;

	uint32_t crtc_x, crtc_y;
	uint32_t x, y;

	uint32_t possible_crtcs;
	uint32_t gamma_size;
} drmModePlane, *drmModePlanePtr;

typedef struct _drmModePlaneRes {
	uint32_t count_planes;
	uint32_t *planes;
} drmModePlaneRes, *drmModePlaneResPtr;

extern void drmModeFreeModeInfo( drmModeModeInfoPtr ptr );
extern void drmModeFreeResources( drmModeResPtr ptr );
extern void drmModeFreeFB( drmModeFBPtr ptr );
extern void drmModeFreeFB2( drmModeFB2Ptr ptr );
extern void drmModeFreeCrtc( drmModeCrtcPtr ptr );
extern void drmModeFreeConnector( drmModeConnectorPtr ptr );
extern void drmModeFreeEncoder( drmModeEncoderPtr ptr );
extern void drmModeFreePlane( drmModePlanePtr ptr );
extern void drmModeFreePlaneResources(drmModePlaneResPtr ptr);

/**
 * Check whether the DRM node supports Kernel Mode-Setting.
 *
 * Returns 1 if suitable for KMS, 0 otherwise.
 */
extern int drmIsKMS(int fd);

/**
 * Retrieves all of the resources associated with a card.
 */
extern drmModeResPtr drmModeGetResources(int fd);

/*
 * FrameBuffer manipulation.
 */

/**
 * Retrieve information about framebuffer bufferId
 */
extern drmModeFBPtr drmModeGetFB(int fd, uint32_t bufferId);
extern drmModeFB2Ptr drmModeGetFB2(int fd, uint32_t bufferId);

/**
 * Creates a new framebuffer with an buffer object as its scanout buffer.
 */
extern int drmModeAddFB(int fd, uint32_t width, uint32_t height, uint8_t depth,
			uint8_t bpp, uint32_t pitch, uint32_t bo_handle,
			uint32_t *buf_id);
/* ...with a specific pixel format */
extern int drmModeAddFB2(int fd, uint32_t width, uint32_t height,
			 uint32_t pixel_format, const uint32_t bo_handles[4],
			 const uint32_t pitches[4], const uint32_t offsets[4],
			 uint32_t *buf_id, uint32_t flags);

/* ...with format modifiers */
int drmModeAddFB2WithModifiers(int fd, uint32_t width, uint32_t height,
			       uint32_t pixel_format, const uint32_t bo_handles[4],
			       const uint32_t pitches[4], const uint32_t offsets[4],
			       const uint64_t modifier[4], uint32_t *buf_id,
				   uint32_t flags);

/**
 * Destroies the given framebuffer.
 */
extern int drmModeRmFB(int fd, uint32_t bufferId);

/**
 * Close a framebuffer.
 *
 * Same as drmModeRmFB(), except it doesn't implicitly disable planes and CRTCs.
 */
extern int drmModeCloseFB(int fd, uint32_t buffer_id);

/**
 * Mark a region of a framebuffer as dirty.
 */
extern int drmModeDirtyFB(int fd, uint32_t bufferId,
			  drmModeClipPtr clips, uint32_t num_clips);


/*
 * Crtc functions
 */

/**
 * Retrieve information about the ctrt crtcId
 */
extern drmModeCrtcPtr drmModeGetCrtc(int fd, uint32_t crtcId);

/**
 * Set the mode on a crtc crtcId with the given mode modeId.
 */
int drmModeSetCrtc(int fd, uint32_t crtcId, uint32_t bufferId,
                   uint32_t x, uint32_t y, uint32_t *connectors, int count,
		   drmModeModeInfoPtr mode);

/*
 * Cursor functions
 */

/**
 * Set the cursor on crtc
 */
int drmModeSetCursor(int fd, uint32_t crtcId, uint32_t bo_handle, uint32_t width, uint32_t height);

int drmModeSetCursor2(int fd, uint32_t crtcId, uint32_t bo_handle, uint32_t width, uint32_t height, int32_t hot_x, int32_t hot_y);
/**
 * Move the cursor on crtc
 */
int drmModeMoveCursor(int fd, uint32_t crtcId, int x, int y);

/**
 * Encoder functions
 */
drmModeEncoderPtr drmModeGetEncoder(int fd, uint32_t encoder_id);

/*
 * Connector manipulation
 */

/**
 * Retrieve all information about the connector connectorId. This will do a
 * forced probe on the connector to retrieve remote information such as EDIDs
 * from the display device.
 */
extern drmModeConnectorPtr drmModeGetConnector(int fd,
					       uint32_t connectorId);

/**
 * Retrieve current information, i.e the currently active mode and encoder,
 * about the connector connectorId. This will not do any probing on the
 * connector or remote device, and only reports what is currently known.
 * For the complete set of modes and encoders associated with the connector
 * use drmModeGetConnector() which will do a probe to determine any display
 * link changes first.
 */
extern drmModeConnectorPtr drmModeGetConnectorCurrent(int fd,
						      uint32_t connector_id);

/**
 * Get a bitmask of CRTCs a connector is compatible with.
 *
 * The bits reference CRTC indices. If the n-th CRTC is compatible with the
 * connector, the n-th bit will be set. The indices are taken from the array
 * returned by drmModeGetResources(). The indices are different from the object
 * IDs.
 *
 * Zero is returned on error.
 */
extern uint32_t drmModeConnectorGetPossibleCrtcs(int fd,
                                                 const drmModeConnector *connector);

/**
 * Attaches the given mode to an connector.
 */
extern int drmModeAttachMode(int fd, uint32_t connectorId, drmModeModeInfoPtr mode_info);

/**
 * Detaches a mode from the connector
 * must be unused, by the given mode.
 */
extern int drmModeDetachMode(int fd, uint32_t connectorId, drmModeModeInfoPtr mode_info);

extern drmModePropertyPtr drmModeGetProperty(int fd, uint32_t propertyId);
extern void drmModeFreeProperty(drmModePropertyPtr ptr);

extern drmModePropertyBlobPtr drmModeGetPropertyBlob(int fd, uint32_t blob_id);
extern bool drmModeFormatModifierBlobIterNext(const drmModePropertyBlobRes *blob,
					      drmModeFormatModifierIterator *iter);
extern void drmModeFreePropertyBlob(drmModePropertyBlobPtr ptr);
extern int drmModeConnectorSetProperty(int fd, uint32_t connector_id, uint32_t property_id,
				    uint64_t value);
extern int drmCheckModesettingSupported(const char *busid);

extern int drmModeCrtcSetGamma(int fd, uint32_t crtc_id, uint32_t size,
			       const uint16_t *red, const uint16_t *green, const uint16_t *blue);
extern int drmModeCrtcGetGamma(int fd, uint32_t crtc_id, uint32_t size,
			       uint16_t *red, uint16_t *green, uint16_t *blue);
extern int drmModePageFlip(int fd, uint32_t crtc_id, uint32_t fb_id,
			   uint32_t flags, void *user_data);
extern int drmModePageFlipTarget(int fd, uint32_t crtc_id, uint32_t fb_id,
				 uint32_t flags, void *user_data,
				 uint32_t target_vblank);

extern drmModePlaneResPtr drmModeGetPlaneResources(int fd);
extern drmModePlanePtr drmModeGetPlane(int fd, uint32_t plane_id);
extern int drmModeSetPlane(int fd, uint32_t plane_id, uint32_t crtc_id,
			   uint32_t fb_id, uint32_t flags,
			   int32_t crtc_x, int32_t crtc_y,
			   uint32_t crtc_w, uint32_t crtc_h,
			   uint32_t src_x, uint32_t src_y,
			   uint32_t src_w, uint32_t src_h);

extern drmModeObjectPropertiesPtr drmModeObjectGetProperties(int fd,
							uint32_t object_id,
							uint32_t object_type);
extern void drmModeFreeObjectProperties(drmModeObjectPropertiesPtr ptr);
extern int drmModeObjectSetProperty(int fd, uint32_t object_id,
				    uint32_t object_type, uint32_t property_id,
				    uint64_t value);


typedef struct _drmModeAtomicReq drmModeAtomicReq, *drmModeAtomicReqPtr;

extern drmModeAtomicReqPtr drmModeAtomicAlloc(void);
extern drmModeAtomicReqPtr drmModeAtomicDuplicate(const drmModeAtomicReqPtr req);
extern int drmModeAtomicMerge(drmModeAtomicReqPtr base,
			      const drmModeAtomicReqPtr augment);
extern void drmModeAtomicFree(drmModeAtomicReqPtr req);
extern int drmModeAtomicGetCursor(const drmModeAtomicReqPtr req);
extern void drmModeAtomicSetCursor(drmModeAtomicReqPtr req, int cursor);
extern int drmModeAtomicAddProperty(drmModeAtomicReqPtr req,
				    uint32_t object_id,
				    uint32_t property_id,
				    uint64_t value);
extern int drmModeAtomicCommit(int fd,
			       const drmModeAtomicReqPtr req,
			       uint32_t flags,
			       void *user_data);

extern int drmModeCreatePropertyBlob(int fd, const void *data, size_t size,
				     uint32_t *id);
extern int drmModeDestroyPropertyBlob(int fd, uint32_t id);

/*
 * DRM mode lease APIs. These create and manage new drm_masters with
 * access to a subset of the available DRM resources
 */

extern int drmModeCreateLease(int fd, const uint32_t *objects, int num_objects, int flags, uint32_t *lessee_id);

typedef struct drmModeLesseeList {
	uint32_t count;
	uint32_t lessees[];
} drmModeLesseeListRes, *drmModeLesseeListPtr;

extern drmModeLesseeListPtr drmModeListLessees(int fd);

typedef struct drmModeObjectList {
	uint32_t count;
	uint32_t objects[];
} drmModeObjectListRes, *drmModeObjectListPtr;

extern drmModeObjectListPtr drmModeGetLease(int fd);

extern int drmModeRevokeLease(int fd, uint32_t lessee_id);

/**
 * Get a string describing a connector type.
 *
 * NULL is returned if the connector type is unsupported. Callers should handle
 * this gracefully, e.g. by falling back to "Unknown" or printing the raw value.
 */
extern const char *
drmModeGetConnectorTypeName(uint32_t connector_type);

/**
 * Create a dumb buffer.
 *
 * Given a width, height and bits-per-pixel, the kernel will return a buffer
 * handle, pitch and size. The flags must be zero.
 *
 * Returns 0 on success, negative errno on error.
 */
extern int
drmModeCreateDumbBuffer(int fd, uint32_t width, uint32_t height, uint32_t bpp,
                        uint32_t flags, uint32_t *handle, uint32_t *pitch,
                        uint64_t *size);

/**
 * Destroy a dumb buffer.
 *
 * Returns 0 on success, negative errno on error.
 */
extern int
drmModeDestroyDumbBuffer(int fd, uint32_t handle);

/**
 * Prepare a dumb buffer for mapping.
 *
 * The kernel returns an offset which can be used as an argument to mmap(2) on
 * the DRM FD.
 *
 * Returns 0 on success, negative errno on error.
 */
extern int
drmModeMapDumbBuffer(int fd, uint32_t handle, uint64_t *offset);

#if defined(__cplusplus)
}
#endif

#endif