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 <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 subpixel_order {
	SubPixelUnknown = 0,
	SubPixelHorizontalRGB,
	SubPixelHorizontalBGR,
	SubPixelVerticalRGB,
	SubPixelVerticalBGR,
	SubPixelNone,

};

/**
 * struct drm_scrambling: sink's scrambling support.
 */
struct drm_scrambling {
	/**
	 * @supported: scrambling supported for rates > 340 Mhz.
	 */
	bool supported;
	/**
	 * @low_rates: scrambling supported for rates <= 340 Mhz.
	 */
	bool low_rates;
};

/*
 * struct drm_scdc - Information about scdc capabilities of a HDMI 2.0 sink
 *
 * Provides SCDC register support and capabilities related information on a
 * HDMI 2.0 sink. In case of a HDMI 1.4 sink, all parameter must be 0.
 */
struct drm_scdc {
	/**
	 * @supported: status control & data channel present.
	 */
	bool supported;
	/**
	 * @read_request: sink is capable of generating scdc read request.
	 */
	bool read_request;
	/**
	 * @scrambling: sink's scrambling capabilities
	 */
	struct drm_scrambling scrambling;
};


/**
 * struct drm_hdmi_info - runtime information about the connected HDMI sink
 *
 * Describes if a given display supports advanced HDMI 2.0 features.
 * This information is available in CEA-861-F extension blocks (like HF-VSDB).
 */
struct drm_hdmi_info {
	/** @scdc: sink's scdc support and capabilities */
	struct drm_scdc scdc;

	/**
	 * @y420_vdb_modes: bitmap of modes which can support ycbcr420
	 * output only (not normal RGB/YCBCR444/422 outputs). There are total
	 * 107 VICs defined by CEA-861-F spec, so the size is 128 bits to map
	 * upto 128 VICs;
	 */
	unsigned long y420_vdb_modes[BITS_TO_LONGS(128)];

	/**
	 * @y420_cmdb_modes: bitmap of modes which can support ycbcr420
	 * output also, along with normal HDMI outputs. There are total 107
	 * VICs defined by CEA-861-F spec, so the size is 128 bits to map upto
	 * 128 VICs;
	 */
	unsigned long y420_cmdb_modes[BITS_TO_LONGS(128)];

	/** @y420_cmdb_map: bitmap of SVD index, to extraxt vcb modes */
	u64 y420_cmdb_map;

	/** @y420_dc_modes: bitmap of deep color support index */
	u8 y420_dc_modes;
};

/**
 * enum drm_link_status - connector's link_status property value
 *
 * This enum is used as the connector's link status property value.
 * It is set to the values defined in uapi.
 *
 * @DRM_LINK_STATUS_GOOD: DP Link is Good as a result of successful
 *                        link training
 * @DRM_LINK_STATUS_BAD: DP Link is BAD as a result of link training
 *                       failure
 */
enum drm_link_status {
	DRM_LINK_STATUS_GOOD = DRM_MODE_LINK_STATUS_GOOD,
	DRM_LINK_STATUS_BAD = DRM_MODE_LINK_STATUS_BAD,
};

/**
 * enum drm_panel_orientation - panel_orientation info for &drm_display_info
 *
 * This enum is used to track the (LCD) panel orientation. There are no
 * separate #defines for the uapi!
 *
 * @DRM_MODE_PANEL_ORIENTATION_UNKNOWN: The drm driver has not provided any
 *					panel orientation information (normal
 *					for non panels) in this case the "panel
 *					orientation" connector prop will not be
 *					attached.
 * @DRM_MODE_PANEL_ORIENTATION_NORMAL:	The top side of the panel matches the
 *					top side of the device's casing.
 * @DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP: The top side of the panel matches the