path: root/include/drm/drm_connector.h

/*
 * 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_CONNECTOR_H__
#define __DRM_CONNECTOR_H__

#include <linux/list.h>
#include <linux/llist.h>
#include <linux/ctype.h>
#include <linux/hdmi.h>
#include <drm/drm_mode_object.h>
#include <drm/drm_util.h>

#include <uapi/drm/drm_mode.h>

struct drm_connector_helper_funcs;
struct drm_modeset_acquire_ctx;
struct drm_device;
struct drm_crtc;
struct drm_encoder;
struct drm_property;
struct drm_property_blob;
struct drm_printer;
struct edid;

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 */
};

/**
 * enum drm_connector_status - status for a &drm_connector
 *
 * This enum is used to track the connector status. There are no separate
 * #defines for the uapi!
 */
enum drm_connector_status {
	/**
	 * @connector_status_connected: The connector is definitely connected to
	 * a sink device, and can be enabled.
	 */
	connector_status_connected = 1,
	/**
	 * @connector_status_disconnected: The connector isn't connected to a
	 * sink device which can be autodetect. For digital outputs like DP or
	 * HDMI (which can be realiable probed) this means there's really
	 * nothing there. It is driver-dependent whether a connector with this
	 * status can be lit up or not.
	 */
	connector_status_disconnected = 2,
	/**
	 * @connector_status_unknown: The connector's status could not be
	 * reliably detected. This happens when probing would either cause
	 * flicker (like load-detection when the connector is in use), or when a
	 * hardware resource isn't available (like when load-detection needs a
	 * free CRTC). It should be possible to light up the connector with one
	 * of the listed fallback modes. For default configuration userspace
	 * should only try to light up connectors with unknown status when
	 * there's not connector with @connector_status_connected.
	 */
	connector_status_unknown = 3,
};

/**
 * enum drm_connector_registration_status - userspace registration status for
 * a &drm_connector
 *
 * This enum is used to track the status of initializing a connector and
 * registering it with userspace, so that DRM can prevent bogus modesets on
 * connectors that no longer exist.
 */
enum drm_connector_registration_state {
	/**
	 * @DRM_CONNECTOR_INITIALIZING: The connector has just been created,
	 * but has yet to be exposed to userspace. There should be no
	 * additional restrictions to how the state of this connector may be
	 * modified.
	 */
	DRM_CONNECTOR_INITIALIZING = 0,

	/**
	 * @DRM_CONNECTOR_REGISTERED: The connector has been fully initialized
	 * and registered with sysfs, as such it has been exposed to
	 * userspace. There should be no additional restrictions to how the
	 * state of this connector may be modified.
	 */
	DRM_CONNECTOR_REGISTERED = 1,

	/**
	 * @DRM_CONNECTOR_UNREGISTERED: The connector has either been exposed
	 * to userspace and has since been unregistered and removed from
	 * userspace, or the connector was unregistered before it had a chance
	 * to be exposed to userspace (e.g. still in the
	 * @DRM_CONNECTOR_INITIALIZING state). When a connector is
	 * unregistered, there are additional restrictions to how its state
	 * may be modified:
	 *
	 * - An unregistered connector may only have its DPMS changed from
	 *   On->Off. Once DPMS is changed to Off, it may not be switched back
	 *   to On.
	 * - Modesets are not allowed on unregistered connectors, unless they
	 *   would result in disabling its assigned CRTCs. This means
	 *   disabling a CRTC on an unregistered connector is OK, but enabling
	 *   one is not.
	 * - Removing a CRTC from an unregistered connector is OK, but new
	 *   CRTCs may never be assigned to an unregistered connector.
	 */
	DRM_CONNECTOR_UNREGISTERED = 2,
};

enum subpixel_order {