linux-imx

/*

 * 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.

 */

​

#include <drm/drm_connector.h>

#include <drm/drm_edid.h>

#include <drm/drm_encoder.h>

#include <drm/drm_utils.h>

#include <drm/drm_print.h>

#include <drm/drm_drv.h>

#include <drm/drm_file.h>

​

#include <linux/uaccess.h>

​

#include "drm_crtc_internal.h"

#include "drm_internal.h"

​

/**

 * DOC: overview

 *

 * In DRM connectors are the general abstraction for display sinks, and include

 * als fixed panels or anything else that can display pixels in some form. As

 * opposed to all other KMS objects representing hardware (like CRTC, encoder or

 * plane abstractions) connectors can be hotplugged and unplugged at runtime.

 * Hence they are reference-counted using drm_connector_get() and

 * drm_connector_put().

 *

 * KMS driver must create, initialize, register and attach at a &struct

 * drm_connector for each such sink. The instance is created as other KMS

 * objects and initialized by setting the following fields. The connector is

 * initialized with a call to drm_connector_init() with a pointer to the

 * &struct drm_connector_funcs and a connector type, and then exposed to

 * userspace with a call to drm_connector_register().

 *

 * Connectors must be attached to an encoder to be used. For devices that map

 * connectors to encoders 1:1, the connector should be attached at

 * initialization time with a call to drm_connector_attach_encoder(). The

 * driver must also set the &drm_connector.encoder field to point to the

 * attached encoder.

 *

 * For connectors which are not fixed (like built-in panels) the driver needs to

 * support hotplug notifications. The simplest way to do that is by using the

 * probe helpers, see drm_kms_helper_poll_init() for connectors which don't have

 * hardware support for hotplug interrupts. Connectors with hardware hotplug

 * support can instead use e.g. drm_helper_hpd_irq_event().

 */

​

struct drm_conn_prop_enum_list {

    int type;

    const char *name;

    struct ida ida;

};

​

/*

 * Connector and encoder types.

 */

static struct drm_conn_prop_enum_list drm_connector_enum_list[] = {

    { DRM_MODE_CONNECTOR_Unknown, "Unknown" },

    { DRM_MODE_CONNECTOR_VGA, "VGA" },

    { DRM_MODE_CONNECTOR_DVII, "DVI-I" },

    { DRM_MODE_CONNECTOR_DVID, "DVI-D" },

    { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },

    { DRM_MODE_CONNECTOR_Composite, "Composite" },

    { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },

    { DRM_MODE_CONNECTOR_LVDS, "LVDS" },

    { DRM_MODE_CONNECTOR_Component, "Component" },

    { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },

    { DRM_MODE_CONNECTOR_DisplayPort, "DP" },

    { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },

    { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },

    { DRM_MODE_CONNECTOR_TV, "TV" },

    { DRM_MODE_CONNECTOR_eDP, "eDP" },

    { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },

    { DRM_MODE_CONNECTOR_DSI, "DSI" },