/*
 * Copyright (c) 2006-2008 Intel Corporation
 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
 * Copyright (c) 2008 Red Hat Inc.
 *
 * DRM core CRTC related functions
 *
 * 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.
 *
 * Authors:
 *      Keith Packard
 *      Eric Anholt <eric@anholt.net>
 *      Dave Airlie <airlied@linux.ie>
 *      Jesse Barnes <jesse.barnes@intel.com>
 */
#include <linux/list.h>
#include "drm.h"
#include "drmP.h"
#include "drm_crtc.h"

struct drm_prop_enum_list {
        int type;
        char *name;
};

/* Avoid boilerplate.  I'm tired of typing. */
#define DRM_ENUM_NAME_FN(fnname, list)                          \
        char *fnname(int val)                                   \
        {                                                       \
                int i;                                          \
                for (i = 0; i < ARRAY_SIZE(list); i++) {        \
                        if (list[i].type == val)                \
                                return list[i].name;            \
                }                                               \
                return "(unknown)";                             \
        }

/*
 * Global properties
 */
static struct drm_prop_enum_list drm_dpms_enum_list[] =
{       { DRM_MODE_DPMS_ON, "On" },
        { DRM_MODE_DPMS_STANDBY, "Standby" },
        { DRM_MODE_DPMS_SUSPEND, "Suspend" },
        { DRM_MODE_DPMS_OFF, "Off" }
};

DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)

/*
 * Optional properties
 */
static struct drm_prop_enum_list drm_scaling_mode_enum_list[] =
{
        { DRM_MODE_SCALE_NONE, "None" },
        { DRM_MODE_SCALE_FULLSCREEN, "Full" },
        { DRM_MODE_SCALE_CENTER, "Center" },
        { DRM_MODE_SCALE_ASPECT, "Full aspect" },
};

static struct drm_prop_enum_list drm_dithering_mode_enum_list[] =
{
        { DRM_MODE_DITHERING_OFF, "Off" },
        { DRM_MODE_DITHERING_ON, "On" },
};

/*
 * Non-global properties, but "required" for certain connectors.
 */
static struct drm_prop_enum_list drm_dvi_i_select_enum_list[] =
{
        { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
        { DRM_MODE_SUBCONNECTOR_DVID,      "DVI-D"     }, /* DVI-I  */
        { DRM_MODE_SUBCONNECTOR_DVIA,      "DVI-A"     }, /* DVI-I  */
};

DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)

static struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] =
{
        { DRM_MODE_SUBCONNECTOR_Unknown,   "Unknown"   }, /* DVI-I and TV-out */
        { DRM_MODE_SUBCONNECTOR_DVID,      "DVI-D"     }, /* DVI-I  */
        { DRM_MODE_SUBCONNECTOR_DVIA,      "DVI-A"     }, /* DVI-I  */
};

DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
                 drm_dvi_i_subconnector_enum_list)

static struct drm_prop_enum_list drm_tv_select_enum_list[] =
{
        { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
        { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
        { DRM_MODE_SUBCONNECTOR_SVIDEO,    "SVIDEO"    }, /* TV-out */
        { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
        { DRM_MODE_SUBCONNECTOR_SCART,     "SCART"     }, /* TV-out */
};

DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)

static struct drm_prop_enum_list drm_tv_subconnector_enum_list[] =
{
        { DRM_MODE_SUBCONNECTOR_Unknown,   "Unknown"   }, /* DVI-I and TV-out */
        { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
        { DRM_MODE_SUBCONNECTOR_SVIDEO,    "SVIDEO"    }, /* TV-out */
        { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
        { DRM_MODE_SUBCONNECTOR_SCART,     "SCART"     }, /* TV-out */
};

DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
                 drm_tv_subconnector_enum_list)

struct drm_conn_prop_enum_list {
        int type;
        char *name;
        int count;
};

/*
 * Connector and encoder types.
 */
static struct drm_conn_prop_enum_list drm_connector_enum_list[] =
{       { DRM_MODE_CONNECTOR_Unknown, "Unknown", 0 },
        { DRM_MODE_CONNECTOR_VGA, "VGA", 0 },
        { DRM_MODE_CONNECTOR_DVII, "DVI-I", 0 },
        { DRM_MODE_CONNECTOR_DVID, "DVI-D", 0 },
        { DRM_MODE_CONNECTOR_DVIA, "DVI-A", 0 },
        { DRM_MODE_CONNECTOR_Composite, "Composite", 0 },
        { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO", 0 },
        { DRM_MODE_CONNECTOR_LVDS, "LVDS", 0 },
        { DRM_MODE_CONNECTOR_Component, "Component", 0 },
        { DRM_MODE_CONNECTOR_9PinDIN, "9-pin DIN", 0 },
        { DRM_MODE_CONNECTOR_DisplayPort, "DisplayPort", 0 },
        { DRM_MODE_CONNECTOR_HDMIA, "HDMI Type A", 0 },
        { DRM_MODE_CONNECTOR_HDMIB, "HDMI Type B", 0 },
        { DRM_MODE_CONNECTOR_TV, "TV", 0 },
};

static struct drm_prop_enum_list drm_encoder_enum_list[] =
{       { DRM_MODE_ENCODER_NONE, "None" },
        { DRM_MODE_ENCODER_DAC, "DAC" },
        { DRM_MODE_ENCODER_TMDS, "TMDS" },
        { DRM_MODE_ENCODER_LVDS, "LVDS" },
        { DRM_MODE_ENCODER_TVDAC, "TV" },
};

char *drm_get_encoder_name(struct drm_encoder *encoder)
{
        static char buf[32];

        snprintf(buf, 32, "%s-%d",
                 drm_encoder_enum_list[encoder->encoder_type].name,
                 encoder->base.id);
        return buf;
}
EXPORT_SYMBOL(drm_get_encoder_name);

char *drm_get_connector_name(struct drm_connector *connector)
{
        static char buf[32];

        snprintf(buf, 32, "%s-%d",
                 drm_connector_enum_list[connector->connector_type].name,
                 connector->connector_type_id);
        return buf;
}
EXPORT_SYMBOL(drm_get_connector_name);

char *drm_get_connector_status_name(enum drm_connector_status status)
{
        if (status == connector_status_connected)
                return "connected";
        else if (status == connector_status_disconnected)
                return "disconnected";
        else
                return "unknown";
}

/**
 * drm_mode_object_get - allocate a new identifier
 * @dev: DRM device
 * @ptr: object pointer, used to generate unique ID
 * @type: object type
 *
 * LOCKING:
 *
 * Create a unique identifier based on @ptr in @dev's identifier space.  Used
 * for tracking modes, CRTCs and connectors.
 *
 * RETURNS:
 * New unique (relative to other objects in @dev) integer identifier for the
 * object.
 */
static int drm_mode_object_get(struct drm_device *dev,
                               struct drm_mode_object *obj, uint32_t obj_type)
{
        int new_id = 0;
        int ret;

again:
        if (idr_pre_get(&dev->mode_config.crtc_idr, GFP_KERNEL) == 0) {
                DRM_ERROR("Ran out memory getting a mode number\n");
                return -EINVAL;
        }

        mutex_lock(&dev->mode_config.idr_mutex);
        ret = idr_get_new_above(&dev->mode_config.crtc_idr, obj, 1, &new_id);
        mutex_unlock(&dev->mode_config.idr_mutex);
        if (ret == -EAGAIN)
                goto again;

        obj->id = new_id;
        obj->type = obj_type;
        return 0;
}

/**
 * drm_mode_object_put - free an identifer
 * @dev: DRM device
 * @id: ID to free
 *
 * LOCKING:
 * Caller must hold DRM mode_config lock.
 *
 * Free @id from @dev's unique identifier pool.
 */
static void drm_mode_object_put(struct drm_device *dev,
                                struct drm_mode_object *object)
{
        mutex_lock(&dev->mode_config.idr_mutex);
        idr_remove(&dev->mode_config.crtc_idr, object->id);
        mutex_unlock(&dev->mode_config.idr_mutex);
}

void *drm_mode_object_find(struct drm_device *dev, uint32_t id, uint32_t type)
{
        struct drm_mode_object *obj = NULL;

        mutex_lock(&dev->mode_config.idr_mutex);
        obj = idr_find(&dev->mode_config.crtc_idr, id);
        if (!obj || (obj->type != type) || (obj->id != id))
                obj = NULL;
        mutex_unlock(&dev->mode_config.idr_mutex);

        return obj;
}
EXPORT_SYMBOL(drm_mode_object_find);

/**
 * drm_framebuffer_init - initialize a framebuffer
 * @dev: DRM device
 *
 * LOCKING:
 * Caller must hold mode config lock.
 *
 * Allocates an ID for the framebuffer's parent mode object, sets its mode
 * functions & device file and adds it to the master fd list.
 *
 * RETURNS:
 * Zero on success, error code on falure.
 */
int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
                         const struct drm_framebuffer_funcs *funcs)
{
        int ret;

        ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
        if (ret) {
                return ret;
        }

        fb->dev = dev;
        fb->funcs = funcs;
        dev->mode_config.num_fb++;
        list_add(&fb->head, &dev->mode_config.fb_list);

        return 0;
}
EXPORT_SYMBOL(drm_framebuffer_init);

/**
 * drm_framebuffer_cleanup - remove a framebuffer object
 * @fb: framebuffer to remove
 *
 * LOCKING:
 * Caller must hold mode config lock.
 *
 * Scans all the CRTCs in @dev's mode_config.  If they're using @fb, removes
 * it, setting it to NULL.
 */
void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
{
        struct drm_device *dev = fb->dev;
        struct drm_crtc *crtc;
        struct drm_mode_set set;
        int ret;

        /* remove from any CRTC */
        list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
                if (crtc->fb == fb) {
                        /* should turn off the crtc */
                        memset(&set, 0, sizeof(struct drm_mode_set));
                        set.crtc = crtc;
                        set.fb = NULL;
                        ret = crtc->funcs->set_config(&set);
                        if (ret)
                                DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
                }
        }

        drm_mode_object_put(dev, &fb->base);
        list_del(&fb->head);
        dev->mode_config.num_fb--;
}
EXPORT_SYMBOL(drm_framebuffer_cleanup);

/**
 * drm_crtc_init - Initialise a new CRTC object
 * @dev: DRM device
 * @crtc: CRTC object to init
 * @funcs: callbacks for the new CRTC
 *
 * LOCKING:
 * Caller must hold mode config lock.
 *
 * Inits a new object created as base part of an driver crtc object.
 */
void drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
                   const struct drm_crtc_funcs *funcs)
{
        crtc->dev = dev;
        crtc->funcs = funcs;

        mutex_lock(&dev->mode_config.mutex);
        drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);

        list_add_tail(&crtc->head, &dev->mode_config.crtc_list);
        dev->mode_config.num_crtc++;
        mutex_unlock(&dev->mode_config.mutex);
}
EXPORT_SYMBOL(drm_crtc_init);

/**
 * drm_crtc_cleanup - Cleans up the core crtc usage.
 * @crtc: CRTC to cleanup
 *
 * LOCKING:
 * Caller must hold mode config lock.
 *
 * Cleanup @crtc. Removes from drm modesetting space
 * does NOT free object, caller does that.
 */
void drm_crtc_cleanup(struct drm_crtc *crtc)
{
        struct drm_device *dev = crtc->dev;

        if (crtc->gamma_store) {
                kfree(crtc->gamma_store);
                crtc->gamma_store = NULL;
        }

        drm_mode_object_put(dev, &crtc->base);
        list_del(&crtc->head);
        dev->mode_config.num_crtc--;
}
EXPORT_SYMBOL(drm_crtc_cleanup);

/**
 * drm_mode_probed_add - add a mode to a connector's probed mode list
 * @connector: connector the new mode
 * @mode: mode data
 *
 * LOCKING:
 * Caller must hold mode config lock.
 *
 * Add @mode to @connector's mode list for later use.
 */
void drm_mode_probed_add(struct drm_connector *connector,
                         struct drm_display_mode *mode)
{
        list_add(&mode->head, &connector->probed_modes);
}
EXPORT_SYMBOL(drm_mode_probed_add);

/**
 * drm_mode_remove - remove and free a mode
 * @connector: connector list to modify
 * @mode: mode to remove
 *
 * LOCKING:
 * Caller must hold mode config lock.
 *
 * Remove @mode from @connector's mode list, then free it.
 */
void drm_mode_remove(struct drm_connector *connector,
                     struct drm_display_mode *mode)
{
        list_del(&mode->head);
        kfree(mode);
}
EXPORT_SYMBOL(drm_mode_remove);

/**
 * drm_connector_init - Init a preallocated connector
 * @dev: DRM device
 * @connector: the connector to init
 * @funcs: callbacks for this connector
 * @name: user visible name of the connector
 *
 * LOCKING:
 * Caller must hold @dev's mode_config lock.
 *
 * Initialises a preallocated connector. Connectors should be
 * subclassed as part of driver connector objects.
 */
void drm_connector_init(struct drm_device *dev,
                     struct drm_connector *connector,
                     const struct drm_connector_funcs *funcs,
                     int connector_type)
{
        mutex_lock(&dev->mode_config.mutex);

        connector->dev = dev;
        connector->funcs = funcs;
        drm_mode_object_get(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR);
        connector->connector_type = connector_type;
        connector->connector_type_id =
                ++drm_connector_enum_list[connector_type].count; /* TODO */
        INIT_LIST_HEAD(&connector->user_modes);
        INIT_LIST_HEAD(&connector->probed_modes);
        INIT_LIST_HEAD(&connector->modes);
        connector->edid_blob_ptr = NULL;

        list_add_tail(&connector->head, &dev->mode_config.connector_list);
        dev->mode_config.num_connector++;

        drm_connector_attach_property(connector,
                                      dev->mode_config.edid_property, 0);

        drm_connector_attach_property(connector,
                                      dev->mode_config.dpms_property, 0);

        mutex_unlock(&dev->mode_config.mutex);
}
EXPORT_SYMBOL(drm_connector_init);

/**
 * drm_connector_cleanup - cleans up an initialised connector
 * @connector: connector to cleanup
 *
 * LOCKING:
 * Caller must hold @dev's mode_config lock.
 *
 * Cleans up the connector but doesn't free the object.
 */
void drm_connector_cleanup(struct drm_connector *connector)
{
        struct drm_device *dev = connector->dev;
        struct drm_display_mode *mode, *t;

        list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
                drm_mode_remove(connector, mode);

        list_for_each_entry_safe(mode, t, &connector->modes, head)
                drm_mode_remove(connector, mode);

        list_for_each_entry_safe(mode, t, &connector->user_modes, head)
                drm_mode_remove(connector, mode);

        kfree(connector->fb_helper_private);
        mutex_lock(&dev->mode_config.mutex);
        drm_mode_object_put(dev, &connector->base);
        list_del(&connector->head);
        mutex_unlock(&dev->mode_config.mutex);
}
EXPORT_SYMBOL(drm_connector_cleanup);

void drm_encoder_init(struct drm_device *dev,
                      struct drm_encoder *encoder,
                      const struct drm_encoder_funcs *funcs,
                      int encoder_type)
{
        mutex_lock(&dev->mode_config.mutex);

        encoder->dev = dev;

        drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
        encoder->encoder_type = encoder_type;
        encoder->funcs = funcs;

        list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
        dev->mode_config.num_encoder++;

        mutex_unlock(&dev->mode_config.mutex);
}
EXPORT_SYMBOL(drm_encoder_init);

void drm_encoder_cleanup(struct drm_encoder *encoder)
{
        struct drm_device *dev = encoder->dev;
        mutex_lock(&dev->mode_config.mutex);
        drm_mode_object_put(dev, &encoder->base);
        list_del(&encoder->head);
        mutex_unlock(&dev->mode_config.mutex);
}
EXPORT_SYMBOL(drm_encoder_cleanup);

/**
 * drm_mode_create - create a new display mode
 * @dev: DRM device
 *
 * LOCKING:
 * Caller must hold DRM mode_config lock.
 *
 * Create a new drm_display_mode, give it an ID, and return it.
 *
 * RETURNS:
 * Pointer to new mode on success, NULL on error.
 */
struct drm_display_mode *drm_mode_create(struct drm_device *dev)
{
        struct drm_display_mode *nmode;

        nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL);
        if (!nmode)
                return NULL;

        drm_mode_object_get(dev, &nmode->base, DRM_MODE_OBJECT_MODE);
        return nmode;
}
EXPORT_SYMBOL(drm_mode_create);

/**
 * drm_mode_destroy - remove a mode
 * @dev: DRM device
 * @mode: mode to remove
 *
 * LOCKING:
 * Caller must hold mode config lock.
 *
 * Free @mode's unique identifier, then free it.
 */
void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode)
{
        drm_mode_object_put(dev, &mode->base);

        kfree(mode);
}
EXPORT_SYMBOL(drm_mode_destroy);

static int drm_mode_create_standard_connector_properties(struct drm_device *dev)
{
        struct drm_property *edid;
        struct drm_property *dpms;
        int i;

        /*
         * Standard properties (apply to all connectors)
         */
        edid = drm_property_create(dev, DRM_MODE_PROP_BLOB |
                                   DRM_MODE_PROP_IMMUTABLE,
                                   "EDID", 0);
        dev->mode_config.edid_property = edid;

        dpms = drm_property_create(dev, DRM_MODE_PROP_ENUM,
                                   "DPMS", ARRAY_SIZE(drm_dpms_enum_list));
        for (i = 0; i < ARRAY_SIZE(drm_dpms_enum_list); i++)
                drm_property_add_enum(dpms, i, drm_dpms_enum_list[i].type,
                                      drm_dpms_enum_list[i].name);
        dev->mode_config.dpms_property = dpms;

        return 0;
}

/**
 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
 * @dev: DRM device
 *
 * Called by a driver the first time a DVI-I connector is made.
 */
int drm_mode_create_dvi_i_properties(struct drm_device *dev)
{
        struct drm_property *dvi_i_selector;
        struct drm_property *dvi_i_subconnector;
        int i;

        if (dev->mode_config.dvi_i_select_subconnector_property)
                return 0;

        dvi_i_selector =
                drm_property_create(dev, DRM_MODE_PROP_ENUM,
                                    "select subconnector",
                                    ARRAY_SIZE(drm_dvi_i_select_enum_list));
        for (i = 0; i < ARRAY_SIZE(drm_dvi_i_select_enum_list); i++)
                drm_property_add_enum(dvi_i_selector, i,
                                      drm_dvi_i_select_enum_list[i].type,
                                      drm_dvi_i_select_enum_list[i].name);
        dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;

        dvi_i_subconnector =
                drm_property_create(dev, DRM_MODE_PROP_ENUM |
                                    DRM_MODE_PROP_IMMUTABLE,
                                    "subconnector",
                                    ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
        for (i = 0; i < ARRAY_SIZE(drm_dvi_i_subconnector_enum_list); i++)
                drm_property_add_enum(dvi_i_subconnector, i,
                                      drm_dvi_i_subconnector_enum_list[i].type,
                                      drm_dvi_i_subconnector_enum_list[i].name);
        dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;

        return 0;
}
EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);

/**
 * drm_create_tv_properties - create TV specific connector properties
 * @dev: DRM device
 * @num_modes: number of different TV formats (modes) supported
 * @modes: array of pointers to strings containing name of each format
 *
 * Called by a driver's TV initialization routine, this function creates
 * the TV specific connector properties for a given device.  Caller is
 * responsible for allocating a list of format names and passing them to
 * this routine.
 */
int drm_mode_create_tv_properties(struct drm_device *dev, int num_modes,
                                  char *modes[])
{
        struct drm_property *tv_selector;
        struct drm_property *tv_subconnector;
        int i;

        if (dev->mode_config.tv_select_subconnector_property)
                return 0;

        /*
         * Basic connector properties
         */
        tv_selector = drm_property_create(dev, DRM_MODE_PROP_ENUM,
                                          "select subconnector",
                                          ARRAY_SIZE(drm_tv_select_enum_list));
        for (i = 0; i < ARRAY_SIZE(drm_tv_select_enum_list); i++)
                drm_property_add_enum(tv_selector, i,
                                      drm_tv_select_enum_list[i].type,
                                      drm_tv_select_enum_list[i].name);
        dev->mode_config.tv_select_subconnector_property = tv_selector;

        tv_subconnector =
                drm_property_create(dev, DRM_MODE_PROP_ENUM |
                                    DRM_MODE_PROP_IMMUTABLE, "subconnector",
                                    ARRAY_SIZE(drm_tv_subconnector_enum_list));
        for (i = 0; i < ARRAY_SIZE(drm_tv_subconnector_enum_list); i++)
                drm_property_add_enum(tv_subconnector, i,
                                      drm_tv_subconnector_enum_list[i].type,
                                      drm_tv_subconnector_enum_list[i].name);
        dev->mode_config.tv_subconnector_property = tv_subconnector;

        /*
         * Other, TV specific properties: margins & TV modes.
         */
        dev->mode_config.tv_left_margin_property =
                drm_property_create(dev, DRM_MODE_PROP_RANGE,
                                    "left margin", 2);
        dev->mode_config.tv_left_margin_property->values[0] = 0;
        dev->mode_config.tv_left_margin_property->values[1] = 100;

        dev->mode_config.tv_right_margin_property =
                drm_property_create(dev, DRM_MODE_PROP_RANGE,
                                    "right margin", 2);
        dev->mode_config.tv_right_margin_property->values[0] = 0;
        dev->mode_config.tv_right_margin_property->values[1] = 100;

        dev->mode_config.tv_top_margin_property =
                drm_property_create(dev, DRM_MODE_PROP_RANGE,
                                    "top margin", 2);
        dev->mode_config.tv_top_margin_property->values[0] = 0;
        dev->mode_config.tv_top_margin_property->values[1] = 100;

        dev->mode_config.tv_bottom_margin_property =
                drm_property_create(dev, DRM_MODE_PROP_RANGE,
                                    "bottom margin", 2);
        dev->mode_config.tv_bottom_margin_property->values[0] = 0;
        dev->mode_config.tv_bottom_margin_property->values[1] = 100;

        dev->mode_config.tv_mode_property =
                drm_property_create(dev, DRM_MODE_PROP_ENUM,
                                    "mode", num_modes);
        for (i = 0; i < num_modes; i++)
                drm_property_add_enum(dev->mode_config.tv_mode_property, i,
                                      i, modes[i]);

        dev->mode_config.tv_brightness_property =
                drm_property_create(dev, DRM_MODE_PROP_RANGE,
                                    "brightness", 2);
        dev->mode_config.tv_brightness_property->values[0] = 0;
        dev->mode_config.tv_brightness_property->values[1] = 100;

        dev->mode_config.tv_contrast_property =
                drm_property_create(dev, DRM_MODE_PROP_RANGE,
                                    "contrast", 2);
        dev->mode_config.tv_contrast_property->values[0] = 0;
        dev->mode_config.tv_contrast_property->values[1] = 100;

        dev->mode_config.tv_flicker_reduction_property =
                drm_property_create(dev, DRM_MODE_PROP_RANGE,
                                    "flicker reduction", 2);
        dev->mode_config.tv_flicker_reduction_property->values[0] = 0;
        dev->mode_config.tv_flicker_reduction_property->values[1] = 100;

        dev->mode_config.tv_overscan_property =
                drm_property_create(dev, DRM_MODE_PROP_RANGE,
                                    "overscan", 2);
        dev->mode_config.tv_overscan_property->values[0] = 0;
        dev->mode_config.tv_overscan_property->values[1] = 100;

        dev->mode_config.tv_saturation_property =
                drm_property_create(dev, DRM_MODE_PROP_RANGE,
                                    "saturation", 2);
        dev->mode_config.tv_saturation_property->values[0] = 0;
        dev->mode_config.tv_saturation_property->values[1] = 100;

        dev->mode_config.tv_hue_property =
                drm_property_create(dev, DRM_MODE_PROP_RANGE,
                                    "hue", 2);
        dev->mode_config.tv_hue_property->values[0] = 0;
        dev->mode_config.tv_hue_property->values[1] = 100;

        return 0;
}
EXPORT_SYMBOL(drm_mode_create_tv_properties);

/**
 * drm_mode_create_scaling_mode_property - create scaling mode property
 * @dev: DRM device
 *
 * Called by a driver the first time it's needed, must be attached to desired
 * connectors.
 */
int drm_mode_create_scaling_mode_property(struct drm_device *dev)
{
        struct drm_property *scaling_mode;
        int i;

        if (dev->mode_config.scaling_mode_property)
                return 0;

        scaling_mode =
                drm_property_create(dev, DRM_MODE_PROP_ENUM, "scaling mode",
                                    ARRAY_SIZE(drm_scaling_mode_enum_list));
        for (i = 0; i < ARRAY_SIZE(drm_scaling_mode_enum_list); i++)
                drm_property_add_enum(scaling_mode, i,
                                      drm_scaling_mode_enum_list[i].type,
                                      drm_scaling_mode_enum_list[i].name);

        dev->mode_config.scaling_mode_property = scaling_mode;

        return 0;
}
EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);

/**
 * drm_mode_create_dithering_property - create dithering property
 * @dev: DRM device
 *
 * Called by a driver the first time it's needed, must be attached to desired
 * connectors.
 */
int drm_mode_create_dithering_property(struct drm_device *dev)
{
        struct drm_property *dithering_mode;
        int i;

        if (dev->mode_config.dithering_mode_property)
                return 0;

        dithering_mode =
                drm_property_create(dev, DRM_MODE_PROP_ENUM, "dithering",
                                    ARRAY_SIZE(drm_dithering_mode_enum_list));
        for (i = 0; i < ARRAY_SIZE(drm_dithering_mode_enum_list); i++)
                drm_property_add_enum(dithering_mode, i,
                                      drm_dithering_mode_enum_list[i].type,
                                      drm_dithering_mode_enum_list[i].name);
        dev->mode_config.dithering_mode_property = dithering_mode;

        return 0;
}
EXPORT_SYMBOL(drm_mode_create_dithering_property);

/**
 * drm_mode_config_init - initialize DRM mode_configuration structure
 * @dev: DRM device
 *
 * LOCKING:
 * None, should happen single threaded at init time.
 *
 * Initialize @dev's mode_config structure, used for tracking the graphics
 * configuration of @dev.
 */
void drm_mode_config_init(struct drm_device *dev)
{
        mutex_init(&dev->mode_config.mutex);
        mutex_init(&dev->mode_config.idr_mutex);
        INIT_LIST_HEAD(&dev->mode_config.fb_list);
        INIT_LIST_HEAD(&dev->mode_config.fb_kernel_list);
        INIT_LIST_HEAD(&dev->mode_config.crtc_list);
        INIT_LIST_HEAD(&dev->mode_config.connector_list);
        INIT_LIST_HEAD(&dev->mode_config.encoder_list);
        INIT_LIST_HEAD(&dev->mode_config.property_list);
        INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
        idr_init(&dev->mode_config.crtc_idr);

        mutex_lock(&dev->mode_config.mutex);
        drm_mode_create_standard_connector_properties(dev);
        mutex_unlock(&dev->mode_config.mutex);

        /* Just to be sure */
        dev->mode_config.num_fb = 0;
        dev->mode_config.num_connector = 0;
        dev->mode_config.num_crtc = 0;
        dev->mode_config.num_encoder = 0;
}
EXPORT_SYMBOL(drm_mode_config_init);

int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group)
{
        uint32_t total_objects = 0;

        total_objects += dev->mode_config.num_crtc;
        total_objects += dev->mode_config.num_connector;
        total_objects += dev->mode_config.num_encoder;

        if (total_objects == 0)
                return -EINVAL;

        group->id_list = kzalloc(total_objects * sizeof(uint32_t), GFP_KERNEL);
        if (!group->id_list)
                return -ENOMEM;

        group->num_crtcs = 0;
        group->num_connectors = 0;
        group->num_encoders = 0;
        return 0;
}

int drm_mode_group_init_legacy_group(struct drm_device *dev,
                                     struct drm_mode_group *group)
{
        struct drm_crtc *crtc;
        struct drm_encoder *encoder;
        struct drm_connector *connector;
        int ret;

        if ((ret = drm_mode_group_init(dev, group)))
                return ret;

        list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
                group->id_list[group->num_crtcs++] = crtc->base.id;

        list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
                group->id_list[group->num_crtcs + group->num_encoders++] =
                encoder->base.id;

        list_for_each_entry(connector, &dev->mode_config.connector_list, head)
                group->id_list[group->num_crtcs + group->num_encoders +
                               group->num_connectors++] = connector->base.id;

        return 0;
}

/**
 * drm_mode_config_cleanup - free up DRM mode_config info
 * @dev: DRM device
 *
 * LOCKING:
 * Caller must hold mode config lock.
 *
 * Free up all the connectors and CRTCs associated with this DRM device, then
 * free up the framebuffers and associated buffer objects.
 *
 * FIXME: cleanup any dangling user buffer objects too
 */
void drm_mode_config_cleanup(struct drm_device *dev)
{
        struct drm_connector *connector, *ot;
        struct drm_crtc *crtc, *ct;
        struct drm_encoder *encoder, *enct;
        struct drm_framebuffer *fb, *fbt;
        struct drm_property *property, *pt;

        list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
                                 head) {
                encoder->funcs->destroy(encoder);
        }

        list_for_each_entry_safe(connector, ot,
                                 &dev->mode_config.connector_list, head) {
                connector->funcs->destroy(connector);
        }

        list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
                                 head) {
                drm_property_destroy(dev, property);
        }

        list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
                fb->funcs->destroy(fb);
        }

        list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
                crtc->funcs->destroy(crtc);
        }

}
EXPORT_SYMBOL(drm_mode_config_cleanup);

/**
 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
 * @out: drm_mode_modeinfo struct to return to the user
 * @in: drm_display_mode to use
 *
 * LOCKING:
 * None.
 *
 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to
 * the user.
 */
void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out,
                               struct drm_display_mode *in)
{
        out->clock = in->clock;
        out->hdisplay = in->hdisplay;
        out->hsync_start = in->hsync_start;
        out->hsync_end = in->hsync_end;
        out->htotal = in->htotal;
        out->hskew = in->hskew;
        out->vdisplay = in->vdisplay;
        out->vsync_start = in->vsync_start;
        out->vsync_end = in->vsync_end;
        out->vtotal = in->vtotal;
        out->vscan = in->vscan;
        out->vrefresh = in->vrefresh;
        out->flags = in->flags;
        out->type = in->type;
        strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
        out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
}

/**
 * drm_crtc_convert_to_umode - convert a modeinfo into a drm_display_mode
 * @out: drm_display_mode to return to the user
 * @in: drm_mode_modeinfo to use
 *
 * LOCKING:
 * None.
 *
 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to
 * the caller.
 */
void drm_crtc_convert_umode(struct drm_display_mode *out,
                            struct drm_mode_modeinfo *in)
{
        out->clock = in->clock;
        out->hdisplay = in->hdisplay;
        out->hsync_start = in->hsync_start;
        out->hsync_end = in->hsync_end;
        out->htotal = in->htotal;
        out->hskew = in->hskew;
        out->vdisplay = in->vdisplay;
        out->vsync_start = in->vsync_start;
        out->vsync_end = in->vsync_end;
        out->vtotal = in->vtotal;
        out->vscan = in->vscan;
        out->vrefresh = in->vrefresh;
        out->flags = in->flags;
        out->type = in->type;
        strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
        out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
}

/**
 * drm_mode_getresources - get graphics configuration
 * @inode: inode from the ioctl
 * @filp: file * from the ioctl
 * @cmd: cmd from ioctl
 * @arg: arg from ioctl

 *
 * LOCKING:
 * Takes mode config lock.
 *
 * Construct a set of configuration description structures and return
 * them to the user, including CRTC, connector and framebuffer configuration.
 *
 * Called by the user via ioctl.
 *
 * RETURNS:
 * Zero on success, errno on failure.
 */
int drm_mode_getresources(struct drm_device *dev, void *data,
                          struct drm_file *file_priv)
{
        struct drm_mode_card_res *card_res = data;
        struct list_head *lh;
        struct drm_framebuffer *fb;
        struct drm_connector *connector;
        struct drm_crtc *crtc;
        struct drm_encoder *encoder;
        int ret = 0;
        int connector_count = 0;
        int crtc_count = 0;
        int fb_count = 0;
        int encoder_count = 0;
        int copied = 0, i;
        uint32_t __user *fb_id;
        uint32_t __user *crtc_id;
        uint32_t __user *connector_id;
        uint32_t __user *encoder_id;
        struct drm_mode_group *mode_group;

        mutex_lock(&dev->mode_config.mutex);

        /*
         * For the non-control nodes we need to limit the list of resources
         * by IDs in the group list for this node
         */
        list_for_each(lh, &file_priv->fbs)
                fb_count++;

        mode_group = &file_priv->master->minor->mode_group;
        if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {

                list_for_each(lh, &dev->mode_config.crtc_list)
                        crtc_count++;

                list_for_each(lh, &dev->mode_config.connector_list)
                        connector_count++;

                list_for_each(lh, &dev->mode_config.encoder_list)
                        encoder_count++;
        } else {

                crtc_count = mode_group->num_crtcs;
                connector_count = mode_group->num_connectors;
                encoder_count = mode_group->num_encoders;
        }

        card_res->max_height = dev->mode_config.max_height;
        card_res->min_height = dev->mode_config.min_height;
        card_res->max_width = dev->mode_config.max_width;
        card_res->min_width = dev->mode_config.min_width;

        /* handle this in 4 parts */
        /* FBs */
        if (card_res->count_fbs >= fb_count) {
                copied = 0;
                fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
                list_for_each_entry(fb, &file_priv->fbs, head) {
                        if (put_user(fb->base.id, fb_id + copied)) {
                                ret = -EFAULT;
                                goto out;
                        }
                        copied++;
                }
        }
        card_res->count_fbs = fb_count;

        /* CRTCs */
        if (card_res->count_crtcs >= crtc_count) {
                copied = 0;
                crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
                if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
                        list_for_each_entry(crtc, &dev->mode_config.crtc_list,
                                            head) {
                                DRM_DEBUG_KMS("CRTC ID is %d\n", crtc->base.id);
                                if (put_user(crtc->base.id, crtc_id + copied)) {
                                        ret = -EFAULT;
                                        goto out;
                                }
                                copied++;
                        }
                } else {
                        for (i = 0; i < mode_group->num_crtcs; i++) {
                                if (put_user(mode_group->id_list[i],
                                             crtc_id + copied)) {
                                        ret = -EFAULT;
                                        goto out;
                                }
                                copied++;
                        }
                }
        }
        card_res->count_crtcs = crtc_count;

        /* Encoders */
        if (card_res->count_encoders >= encoder_count) {
                copied = 0;
                encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr;
                if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
                        list_for_each_entry(encoder,
                                            &dev->mode_config.encoder_list,
                                            head) {
                                DRM_DEBUG_KMS("ENCODER ID is %d\n",
                                          encoder->base.id);
                                if (put_user(encoder->base.id, encoder_id +
                                             copied)) {
                                        ret = -EFAULT;
                                        goto out;
                                }
                                copied++;
                        }
                } else {
                        for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) {
                                if (put_user(mode_group->id_list[i],
                                             encoder_id + copied)) {
                                        ret = -EFAULT;
                                        goto out;
                                }
                                copied++;
                        }

                }
        }
        card_res->count_encoders = encoder_count;

        /* Connectors */
        if (card_res->count_connectors >= connector_count) {
                copied = 0;
                connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr;
                if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
                        list_for_each_entry(connector,
                                            &dev->mode_config.connector_list,
                                            head) {
                                DRM_DEBUG_KMS("CONNECTOR ID is %d\n",
                                          connector->base.id);
                                if (put_user(connector->base.id,
                                             connector_id + copied)) {
                                        ret = -EFAULT;
                                        goto out;
                                }
                                copied++;
                        }
                } else {
                        int start = mode_group->num_crtcs +
                                mode_group->num_encoders;
                        for (i = start; i < start + mode_group->num_connectors; i++) {
                                if (put_user(mode_group->id_list[i],
                                             connector_id + copied)) {
                                        ret = -EFAULT;
                                        goto out;
                                }
                                copied++;
                        }
                }
        }
        card_res->count_connectors = connector_count;

        DRM_DEBUG_KMS("Counted %d %d %d\n", card_res->count_crtcs,
                  card_res->count_connectors, card_res->count_encoders);

out:
        mutex_unlock(&dev->mode_config.mutex);
        return ret;
}

/**
 * drm_mode_getcrtc - get CRTC configuration
 * @inode: inode from the ioctl
 * @filp: file * from the ioctl
 * @cmd: cmd from ioctl
 * @arg: arg from ioctl
 *
 * LOCKING:
 * Caller? (FIXME)
 *
 * Construct a CRTC configuration structure to return to the user.
 *
 * Called by the user via ioctl.
 *
 * RETURNS:
 * Zero on success, errno on failure.
 */
int drm_mode_getcrtc(struct drm_device *dev,
                     void *data, struct drm_file *file_priv)
{
        struct drm_mode_crtc *crtc_resp = data;
        struct drm_crtc *crtc;
        struct drm_mode_object *obj;
        int ret = 0;

        mutex_lock(&dev->mode_config.mutex);

        obj = drm_mode_object_find(dev, crtc_resp->crtc_id,
                                   DRM_MODE_OBJECT_CRTC);
        if (!obj) {
                ret = -EINVAL;
                goto out;
        }
        crtc = obj_to_crtc(obj);

        crtc_resp->x = crtc->x;
        crtc_resp->y = crtc->y;
        crtc_resp->gamma_size = crtc->gamma_size;
        if (crtc->fb)
                crtc_resp->fb_id = crtc->fb->base.id;
        else
                crtc_resp->fb_id = 0;

        if (crtc->enabled) {

                drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->mode);
                crtc_resp->mode_valid = 1;

        } else {
                crtc_resp->mode_valid = 0;
        }

out:
        mutex_unlock(&dev->mode_config.mutex);
        return ret;
}

/**
 * drm_mode_getconnector - get connector configuration
 * @inode: inode from the ioctl
 * @filp: file * from the ioctl
 * @cmd: cmd from ioctl
 * @arg: arg from ioctl
 *
 * LOCKING:
 * Caller? (FIXME)
 *
 * Construct a connector configuration structure to return to the user.
 *
 * Called by the user via ioctl.
 *
 * RETURNS:
 * Zero on success, errno on failure.
 */
int drm_mode_getconnector(struct drm_device *dev, void *data,
                          struct drm_file *file_priv)
{
        struct drm_mode_get_connector *out_resp = data;
        struct drm_mode_object *obj;
        struct drm_connector *connector;
        struct drm_display_mode *mode;
        int mode_count = 0;
        int props_count = 0;
        int encoders_count = 0;
        int ret = 0;
        int copied = 0;
        int i;
        struct drm_mode_modeinfo u_mode;
        struct drm_mode_modeinfo __user *mode_ptr;
        uint32_t __user *prop_ptr;
        uint64_t __user *prop_values;
        uint32_t __user *encoder_ptr;

        memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));

        DRM_DEBUG_KMS("connector id %d:\n", out_resp->connector_id);

        mutex_lock(&dev->mode_config.mutex);

        obj = drm_mode_object_find(dev, out_resp->connector_id,
                                   DRM_MODE_OBJECT_CONNECTOR);
        if (!obj) {
                ret = -EINVAL;
                goto out;
        }
        connector = obj_to_connector(obj);

        for (i = 0; i < DRM_CONNECTOR_MAX_PROPERTY; i++) {
                if (connector->property_ids[i] != 0) {
                        props_count++;
                }
        }

        for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
                if (connector->encoder_ids[i] != 0) {
                        encoders_count++;
                }
        }

        if (out_resp->count_modes == 0) {
                connector->funcs->fill_modes(connector,
                                             dev->mode_config.max_width,
                                             dev->mode_config.max_height);
        }

        /* delayed so we get modes regardless of pre-fill_modes state */
        list_for_each_entry(mode, &connector->modes, head)
                mode_count++;

        out_resp->connector_id = connector->base.id;
        out_resp->connector_type = connector->connector_type;
        out_resp->connector_type_id = connector->connector_type_id;
        out_resp->mm_width = connector->display_info.width_mm;
        out_resp->mm_height = connector->display_info.height_mm;
        out_resp->subpixel = connector->display_info.subpixel_order;
        out_resp->connection = connector->status;
        if (connector->encoder)
                out_resp->encoder_id = connector->encoder->base.id;
        else
                out_resp->encoder_id = 0;

        /*
         * This ioctl is called twice, once to determine how much space is
         * needed, and the 2nd time to fill it.
         */
        if ((out_resp->count_modes >= mode_count) && mode_count) {
                copied = 0;
                mode_ptr = (struct drm_mode_modeinfo *)(unsigned long)out_resp->modes_ptr;
                list_for_each_entry(mode, &connector->modes, head) {
                        drm_crtc_convert_to_umode(&u_mode, mode);
                        if (copy_to_user(mode_ptr + copied,
                                         &u_mode, sizeof(u_mode))) {
                                ret = -EFAULT;
                                goto out;
                        }
                        copied++;
                }
        }
        out_resp->count_modes = mode_count;

        if ((out_resp->count_props >= props_count) && props_count) {
                copied = 0;
                prop_ptr = (uint32_t *)(unsigned long)(out_resp->props_ptr);
                prop_values = (uint64_t *)(unsigned long)(out_resp->prop_values_ptr);
                for (i = 0; i < DRM_CONNECTOR_MAX_PROPERTY; i++) {
                        if (connector->property_ids[i] != 0) {
                                if (put_user(connector->property_ids[i],
                                             prop_ptr + copied)) {
                                        ret = -EFAULT;
                                        goto out;
                                }

                                if (put_user(connector->property_values[i],
                                             prop_values + copied)) {
                                        ret = -EFAULT;
                                        goto out;
                                }
                                copied++;
                        }
                }
        }
        out_resp->count_props = props_count;

        if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
                copied = 0;
                encoder_ptr = (uint32_t *)(unsigned long)(out_resp->encoders_ptr);
                for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
                        if (connector->encoder_ids[i] != 0) {
                                if (put_user(connector->encoder_ids[i],
                                             encoder_ptr + copied)) {
                                        ret = -EFAULT;
                                        goto out;
                                }
                                copied++;
                        }
                }
        }
        out_resp->count_encoders = encoders_count;

out:
        mutex_unlock(&dev->mode_config.mutex);
        return ret;
}

int drm_mode_getencoder(struct drm_device *dev, void *data,
                        struct drm_file *file_priv)
{
        struct drm_mode_get_encoder *enc_resp = data;
        struct drm_mode_object *obj;
        struct drm_encoder *encoder;
        int ret = 0;

        mutex_lock(&dev->mode_config.mutex);
        obj = drm_mode_object_find(dev, enc_resp->encoder_id,
                                   DRM_MODE_OBJECT_ENCODER);
        if (!obj) {
                ret = -EINVAL;
                goto out;
        }
        encoder = obj_to_encoder(obj);

        if (encoder->crtc)
                enc_resp->crtc_id = encoder->crtc->base.id;
        else
                enc_resp->crtc_id = 0;
        enc_resp->encoder_type = encoder->encoder_type;
        enc_resp->encoder_id = encoder->base.id;
        enc_resp->possible_crtcs = encoder->possible_crtcs;
        enc_resp->possible_clones = encoder->possible_clones;

out:
        mutex_unlock(&dev->mode_config.mutex);
        return ret;
}

/**
 * drm_mode_setcrtc - set CRTC configuration
 * @inode: inode from the ioctl
 * @filp: file * from the ioctl
 * @cmd: cmd from ioctl
 * @arg: arg from ioctl
 *
 * LOCKING:
 * Caller? (FIXME)
 *
 * Build a new CRTC configuration based on user request.
 *
 * Called by the user via ioctl.
 *
 * RETURNS:
 * Zero on success, errno on failure.
 */
int drm_mode_setcrtc(struct drm_device *dev, void *data,
                     struct drm_file *file_priv)
{
        struct drm_mode_config *config = &dev->mode_config;
        struct drm_mode_crtc *crtc_req = data;
        struct drm_mode_object *obj;
        struct drm_crtc *crtc, *crtcfb;
        struct drm_connector **connector_set = NULL, *connector;
        struct drm_framebuffer *fb = NULL;
        struct drm_display_mode *mode = NULL;
        struct drm_mode_set set;
        uint32_t __user *set_connectors_ptr;
        int ret = 0;
        int i;

        mutex_lock(&dev->mode_config.mutex);
        obj = drm_mode_object_find(dev, crtc_req->crtc_id,
                                   DRM_MODE_OBJECT_CRTC);
        if (!obj) {
                DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
                ret = -EINVAL;
                goto out;
        }
        crtc = obj_to_crtc(obj);

        if (crtc_req->mode_valid) {
                /* If we have a mode we need a framebuffer. */
                /* If we pass -1, set the mode with the currently bound fb */
                if (crtc_req->fb_id == -1) {
                        list_for_each_entry(crtcfb,
                                            &dev->mode_config.crtc_list, head) {
                                if (crtcfb == crtc) {
                                        DRM_DEBUG_KMS("Using current fb for "
                                                        "setmode\n");
                                        fb = crtc->fb;
                                }
                        }
                } else {
                        obj = drm_mode_object_find(dev, crtc_req->fb_id,
                                                   DRM_MODE_OBJECT_FB);
                        if (!obj) {
                                DRM_DEBUG_KMS("Unknown FB ID%d\n",
                                                crtc_req->fb_id);
                                ret = -EINVAL;
                                goto out;
                        }
                        fb = obj_to_fb(obj);
                }

                mode = drm_mode_create(dev);
                drm_crtc_convert_umode(mode, &crtc_req->mode);
                drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
        }

        if (crtc_req->count_connectors == 0 && mode) {
                DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
                ret = -EINVAL;
                goto out;
        }

        if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
                DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
                          crtc_req->count_connectors);
                ret = -EINVAL;
                goto out;
        }

        if (crtc_req->count_connectors > 0) {
                u32 out_id;

                /* Avoid unbounded kernel memory allocation */
                if (crtc_req->count_connectors > config->num_connector) {
                        ret = -EINVAL;
                        goto out;
                }

                connector_set = kmalloc(crtc_req->count_connectors *
                                        sizeof(struct drm_connector *),
                                        GFP_KERNEL);
                if (!connector_set) {
                        ret = -ENOMEM;
                        goto out;
                }

                for (i = 0; i < crtc_req->count_connectors; i++) {
                        set_connectors_ptr = (uint32_t *)(unsigned long)crtc_req->set_connectors_ptr;
                        if (get_user(out_id, &set_connectors_ptr[i])) {
                                ret = -EFAULT;
                                goto out;
                        }

                        obj = drm_mode_object_find(dev, out_id,
                                                   DRM_MODE_OBJECT_CONNECTOR);
                        if (!obj) {
                                DRM_DEBUG_KMS("Connector id %d unknown\n",
                                                out_id);
                                ret = -EINVAL;
                                goto out;
                        }
                        connector = obj_to_connector(obj);

                        connector_set[i] = connector;
                }
        }

        set.crtc = crtc;
        set.x = crtc_req->x;
        set.y = crtc_req->y;
        set.mode = mode;
        set.connectors = connector_set;
        set.num_connectors = crtc_req->count_connectors;
        set.fb = fb;
        ret = crtc->funcs->set_config(&set);

out:
        kfree(connector_set);
        mutex_unlock(&dev->mode_config.mutex);
        return ret;
}

int drm_mode_cursor_ioctl(struct drm_device *dev,
                        void *data, struct drm_file *file_priv)
{
        struct drm_mode_cursor *req = data;
        struct drm_mode_object *obj;
        struct drm_crtc *crtc;
        int ret = 0;

        if (!req->flags) {
                DRM_ERROR("no operation set\n");
                return -EINVAL;
        }

        mutex_lock(&dev->mode_config.mutex);
        obj = drm_mode_object_find(dev, req->crtc_id, DRM_MODE_OBJECT_CRTC);
        if (!obj) {
                DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
                ret = -EINVAL;
                goto out;
        }
        crtc = obj_to_crtc(obj);

        if (req->flags & DRM_MODE_CURSOR_BO) {
                if (!crtc->funcs->cursor_set) {
                        DRM_ERROR("crtc does not support cursor\n");
                        ret = -ENXIO;
                        goto out;
                }
                /* Turns off the cursor if handle is 0 */
                ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
                                              req->width, req->height);
        }

        if (req->flags & DRM_MODE_CURSOR_MOVE) {
                if (crtc->funcs->cursor_move) {
                        ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
                } else {
                        DRM_ERROR("crtc does not support cursor\n");
                        ret = -EFAULT;
                        goto out;
                }
        }
out:
        mutex_unlock(&dev->mode_config.mutex);
        return ret;
}

/**
 * drm_mode_addfb - add an FB to the graphics configuration
 * @inode: inode from the ioctl
 * @filp: file * from the ioctl
 * @cmd: cmd from ioctl
 * @arg: arg from ioctl
 *
 * LOCKING:
 * Takes mode config lock.
 *
 * Add a new FB to the specified CRTC, given a user request.
 *
 * Called by the user via ioctl.
 *
 * RETURNS:
 * Zero on success, errno on failure.
 */
int drm_mode_addfb(struct drm_device *dev,
                   void *data, struct drm_file *file_priv)
{
        struct drm_mode_fb_cmd *r = data;
        struct drm_mode_config *config = &dev->mode_config;
        struct drm_framebuffer *fb;
        int ret = 0;

        if ((config->min_width > r->width) || (r->width > config->max_width)) {
                DRM_ERROR("mode new framebuffer width not within limits\n");
                return -EINVAL;
        }
        if ((config->min_height > r->height) || (r->height > config->max_height)) {
                DRM_ERROR("mode new framebuffer height not within limits\n");
                return -EINVAL;
        }

        mutex_lock(&dev->mode_config.mutex);

        /* TODO check buffer is sufficently large */
        /* TODO setup destructor callback */

        fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
        if (!fb) {
                DRM_ERROR("could not create framebuffer\n");
                ret = -EINVAL;
                goto out;
        }

        r->fb_id = fb->base.id;
        list_add(&fb->filp_head, &file_priv->fbs);

out:
        mutex_unlock(&dev->mode_config.mutex);
        return ret;
}

/**
 * drm_mode_rmfb - remove an FB from the configuration
 * @inode: inode from the ioctl
 * @filp: file * from the ioctl
 * @cmd: cmd from ioctl
 * @arg: arg from ioctl
 *
 * LOCKING:
 * Takes mode config lock.
 *
 * Remove the FB specified by the user.
 *
 * Called by the user via ioctl.
 *
 * RETURNS:
 * Zero on success, errno on failure.
 */
int drm_mode_rmfb(struct drm_device *dev,
                   void *data, struct drm_file *file_priv)
{
        struct drm_mode_object *obj;
        struct drm_framebuffer *fb = NULL;
        struct drm_framebuffer *fbl = NULL;
        uint32_t *id = data;
        int ret = 0;
        int found = 0;

        mutex_lock(&dev->mode_config.mutex);
        obj = drm_mode_object_find(dev, *id, DRM_MODE_OBJECT_FB);
        /* TODO check that we realy get a framebuffer back. */
        if (!obj) {
                DRM_ERROR("mode invalid framebuffer id\n");
                ret = -EINVAL;
                goto out;
        }
        fb = obj_to_fb(obj);

        list_for_each_entry(fbl, &file_priv->fbs, filp_head)
                if (fb == fbl)
                        found = 1;

        if (!found) {
                DRM_ERROR("tried to remove a fb that we didn't own\n");
                ret = -EINVAL;
                goto out;
        }

        /* TODO release all crtc connected to the framebuffer */
        /* TODO unhock the destructor from the buffer object */

        list_del(&fb->filp_head);
        fb->funcs->destroy(fb);

out:
        mutex_unlock(&dev->mode_config.mutex);
        return ret;
}

/**
 * drm_mode_getfb - get FB info
 * @inode: inode from the ioctl
 * @filp: file * from the ioctl
 * @cmd: cmd from ioctl
 * @arg: arg from ioctl
 *
 * LOCKING:
 * Caller? (FIXME)
 *
 * Lookup the FB given its ID and return info about it.
 *
 * Called by the user via ioctl.
 *
 * RETURNS:
 * Zero on success, errno on failure.
 */
int drm_mode_getfb(struct drm_device *dev,
                   void *data, struct drm_file *file_priv)
{
        struct drm_mode_fb_cmd *r = data;
        struct drm_mode_object *obj;
        struct drm_framebuffer *fb;
        int ret = 0;

        mutex_lock(&dev->mode_config.mutex);
        obj = drm_mode_object_find(dev, r->fb_id, DRM_MODE_OBJECT_FB);
        if (!obj) {
                DRM_ERROR("invalid framebuffer id\n");
                ret = -EINVAL;
                goto out;
        }
        fb = obj_to_fb(obj);

        r->height = fb->height;
        r->width = fb->width;
        r->depth = fb->depth;
        r->bpp = fb->bits_per_pixel;
        r->pitch = fb->pitch;
        fb->funcs->create_handle(fb, file_priv, &r->handle);

out:
        mutex_unlock(&dev->mode_config.mutex);
        return ret;
}

/**
 * drm_fb_release - remove and free the FBs on this file
 * @filp: file * from the ioctl
 *
 * LOCKING:
 * Takes mode config lock.
 *
 * Destroy all the FBs associated with @filp.
 *
 * Called by the user via ioctl.
 *
 * RETURNS:
 * Zero on success, errno on failure.
 */
void drm_fb_release(struct drm_file *priv)
{
        struct drm_device *dev = priv->minor->dev;
        struct drm_framebuffer *fb, *tfb;

        mutex_lock(&dev->mode_config.mutex);
        list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
                list_del(&fb->filp_head);
                fb->funcs->destroy(fb);
        }
        mutex_unlock(&dev->mode_config.mutex);
}

/**
 * drm_mode_attachmode - add a mode to the user mode list
 * @dev: DRM device
 * @connector: connector to add the mode to
 * @mode: mode to add
 *
 * Add @mode to @connector's user mode list.
 */
static int drm_mode_attachmode(struct drm_device *dev,
                               struct drm_connector *connector,
                               struct drm_display_mode *mode)
{
        int ret = 0;

        list_add_tail(&mode->head, &connector->user_modes);
        return ret;
}

int drm_mode_attachmode_crtc(struct drm_device *dev, struct drm_crtc *crtc,
                             struct drm_display_mode *mode)
{
        struct drm_connector *connector;
        int ret = 0;
        struct drm_display_mode *dup_mode;
        int need_dup = 0;
        list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
                if (!connector->encoder)
                        break;
                if (connector->encoder->crtc == crtc) {
                        if (need_dup)
                                dup_mode = drm_mode_duplicate(dev, mode);
                        else
                                dup_mode = mode;
                        ret = drm_mode_attachmode(dev, connector, dup_mode);
                        if (ret)
                                return ret;
                        need_dup = 1;
                }
        }
        return 0;
}
EXPORT_SYMBOL(drm_mode_attachmode_crtc);

static int drm_mode_detachmode(struct drm_device *dev,
                               struct drm_connector *connector,
                               struct drm_display_mode *mode)
{
        int found = 0;
        int ret = 0;
        struct drm_display_mode *match_mode, *t;

        list_for_each_entry_safe(match_mode, t, &connector->user_modes, head) {
                if (drm_mode_equal(match_mode, mode)) {
                        list_del(&match_mode->head);
                        drm_mode_destroy(dev, match_mode);
                        found = 1;
                        break;
                }
        }

        if (!found)
                ret = -EINVAL;

        return ret;
}

int drm_mode_detachmode_crtc(struct drm_device *dev, struct drm_display_mode *mode)
{
        struct drm_connector *connector;

        list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
                drm_mode_detachmode(dev, connector, mode);
        }
        return 0;
}
EXPORT_SYMBOL(drm_mode_detachmode_crtc);

/**
 * drm_fb_attachmode - Attach a user mode to an connector
 * @inode: inode from the ioctl
 * @filp: file * from the ioctl
 * @cmd: cmd from ioctl
 * @arg: arg from ioctl
 *
 * This attaches a user specified mode to an connector.
 * Called by the user via ioctl.
 *
 * RETURNS:
 * Zero on success, errno on failure.
 */
int drm_mode_attachmode_ioctl(struct drm_device *dev,
                              void *data, struct drm_file *file_priv)
{
        struct drm_mode_mode_cmd *mode_cmd = data;
        struct drm_connector *connector;
        struct drm_display_mode *mode;
        struct drm_mode_object *obj;
        struct drm_mode_modeinfo *umode = &mode_cmd->mode;
        int ret = 0;

        mutex_lock(&dev->mode_config.mutex);

        obj = drm_mode_object_find(dev, mode_cmd->connector_id, DRM_MODE_OBJECT_CONNECTOR);
        if (!obj) {
                ret = -EINVAL;
                goto out;
        }
        connector = obj_to_connector(obj);

        mode = drm_mode_create(dev);
        if (!mode) {
                ret = -ENOMEM;
                goto out;
        }

        drm_crtc_convert_umode(mode, umode);

        ret = drm_mode_attachmode(dev, connector, mode);
out:
        mutex_unlock(&dev->mode_config.mutex);
        return ret;
}


/**
 * drm_fb_detachmode - Detach a user specified mode from an connector
 * @inode: inode from the ioctl
 * @filp: file * from the ioctl
 * @cmd: cmd from ioctl
 * @arg: arg from ioctl
 *
 * Called by the user via ioctl.
 *
 * RETURNS:
 * Zero on success, errno on failure.
 */
int drm_mode_detachmode_ioctl(struct drm_device *dev,
                              void *data, struct drm_file *file_priv)
{
        struct drm_mode_object *obj;
        struct drm_mode_mode_cmd *mode_cmd = data;
        struct drm_connector *connector;
        struct drm_display_mode mode;
        struct drm_mode_modeinfo *umode = &mode_cmd->mode;
        int ret = 0;

        mutex_lock(&dev->mode_config.mutex);

        obj = drm_mode_object_find(dev, mode_cmd->connector_id, DRM_MODE_OBJECT_CONNECTOR);
        if (!obj) {
                ret = -EINVAL;
                goto out;
        }
        connector = obj_to_connector(obj);

        drm_crtc_convert_umode(&mode, umode);
        ret = drm_mode_detachmode(dev, connector, &mode);
out:
        mutex_unlock(&dev->mode_config.mutex);
        return ret;
}

struct drm_property *drm_property_create(struct drm_device *dev, int flags,
                                         const char *name, int num_values)
{
        struct drm_property *property = NULL;

        property = kzalloc(sizeof(struct drm_property), GFP_KERNEL);
        if (!property)
                return NULL;

        if (num_values) {
                property->values = kzalloc(sizeof(uint64_t)*num_values, GFP_KERNEL);
                if (!property->values)
                        goto fail;
        }

        drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY);
        property->flags = flags;
        property->num_values = num_values;
        INIT_LIST_HEAD(&property->enum_blob_list);

        if (name)
                strncpy(property->name, name, DRM_PROP_NAME_LEN);

        list_add_tail(&property->head, &dev->mode_config.property_list);
        return property;
fail:
        kfree(property);
        return NULL;
}
EXPORT_SYMBOL(drm_property_create);

int drm_property_add_enum(struct drm_property *property, int index,
                          uint64_t value, const char *name)
{
        struct drm_property_enum *prop_enum;

        if (!(property->flags & DRM_MODE_PROP_ENUM))
                return -EINVAL;

        if (!list_empty(&property->enum_blob_list)) {
                list_for_each_entry(prop_enum, &property->enum_blob_list, head) {
                        if (prop_enum->value == value) {
                                strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
                                prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
                                return 0;
                        }
                }
        }

        prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL);
        if (!prop_enum)
                return -ENOMEM;

        strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
        prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
        prop_enum->value = value;

        property->values[index] = value;
        list_add_tail(&prop_enum->head, &property->enum_blob_list);
        return 0;
}
EXPORT_SYMBOL(drm_property_add_enum);

void drm_property_destroy(struct drm_device *dev, struct drm_property *property)
{
        struct drm_property_enum *prop_enum, *pt;

        list_for_each_entry_safe(prop_enum, pt, &property->enum_blob_list, head) {
                list_del(&prop_enum->head);
                kfree(prop_enum);
        }

        if (property->num_values)
                kfree(property->values);
        drm_mode_object_put(dev, &property->base);
        list_del(&property->head);
        kfree(property);
}
EXPORT_SYMBOL(drm_property_destroy);

int drm_connector_attach_property(struct drm_connector *connector,
                               struct drm_property *property, uint64_t init_val)
{
        int i;

        for (i = 0; i < DRM_CONNECTOR_MAX_PROPERTY; i++) {
                if (connector->property_ids[i] == 0) {
                        connector->property_ids[i] = property->base.id;
                        connector->property_values[i] = init_val;
                        break;
                }
        }

        if (i == DRM_CONNECTOR_MAX_PROPERTY)
                return -EINVAL;
        return 0;
}
EXPORT_SYMBOL(drm_connector_attach_property);

int drm_connector_property_set_value(struct drm_connector *connector,
                                  struct drm_property *property, uint64_t value)
{
        int i;

        for (i = 0; i < DRM_CONNECTOR_MAX_PROPERTY; i++) {
                if (connector->property_ids[i] == property->base.id) {
                        connector->property_values[i] = value;
                        break;
                }
        }

        if (i == DRM_CONNECTOR_MAX_PROPERTY)
                return -EINVAL;
        return 0;
}
EXPORT_SYMBOL(drm_connector_property_set_value);

int drm_connector_property_get_value(struct drm_connector *connector,
                                  struct drm_property *property, uint64_t *val)
{
        int i;

        for (i = 0; i < DRM_CONNECTOR_MAX_PROPERTY; i++) {
                if (connector->property_ids[i] == property->base.id) {
                        *val = connector->property_values[i];
                        break;
                }
        }

        if (i == DRM_CONNECTOR_MAX_PROPERTY)
                return -EINVAL;
        return 0;
}
EXPORT_SYMBOL(drm_connector_property_get_value);

int drm_mode_getproperty_ioctl(struct drm_device *dev,
                               void *data, struct drm_file *file_priv)
{
        struct drm_mode_object *obj;
        struct drm_mode_get_property *out_resp = data;
        struct drm_property *property;
        int enum_count = 0;
        int blob_count = 0;
        int value_count = 0;
        int ret = 0, i;
        int copied;
        struct drm_property_enum *prop_enum;
        struct drm_mode_property_enum __user *enum_ptr;
        struct drm_property_blob *prop_blob;
        uint32_t *blob_id_ptr;
        uint64_t __user *values_ptr;
        uint32_t __user *blob_length_ptr;

        mutex_lock(&dev->mode_config.mutex);
        obj = drm_mode_object_find(dev, out_resp->prop_id, DRM_MODE_OBJECT_PROPERTY);
        if (!obj) {
                ret = -EINVAL;
                goto done;
        }
        property = obj_to_property(obj);

        if (property->flags & DRM_MODE_PROP_ENUM) {
                list_for_each_entry(prop_enum, &property->enum_blob_list, head)
                        enum_count++;
        } else if (property->flags & DRM_MODE_PROP_BLOB) {
                list_for_each_entry(prop_blob, &property->enum_blob_list, head)
                        blob_count++;
        }

        value_count = property->num_values;

        strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN);
        out_resp->name[DRM_PROP_NAME_LEN-1] = 0;
        out_resp->flags = property->flags;

        if ((out_resp->count_values >= value_count) && value_count) {
                values_ptr = (uint64_t *)(unsigned long)out_resp->values_ptr;
                for (i = 0; i < value_count; i++) {
                        if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) {
                                ret = -EFAULT;
                                goto done;
                        }
                }
        }
        out_resp->count_values = value_count;

        if (property->flags & DRM_MODE_PROP_ENUM) {
                if ((out_resp->count_enum_blobs >= enum_count) && enum_count) {
                        copied = 0;
                        enum_ptr = (struct drm_mode_property_enum *)(unsigned long)out_resp->enum_blob_ptr;
                        list_for_each_entry(prop_enum, &property->enum_blob_list, head) {

                                if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) {
                                        ret = -EFAULT;
                                        goto done;
                                }

                                if (copy_to_user(&enum_ptr[copied].name,
                                                 &prop_enum->name, DRM_PROP_NAME_LEN)) {
                                        ret = -EFAULT;
                                        goto done;
                                }
                                copied++;
                        }
                }
                out_resp->count_enum_blobs = enum_count;
        }

        if (property->flags & DRM_MODE_PROP_BLOB) {
                if ((out_resp->count_enum_blobs >= blob_count) && blob_count) {
                        copied = 0;
                        blob_id_ptr = (uint32_t *)(unsigned long)out_resp->enum_blob_ptr;
                        blob_length_ptr = (uint32_t *)(unsigned long)out_resp->values_ptr;

                        list_for_each_entry(prop_blob, &property->enum_blob_list, head) {
                                if (put_user(prop_blob->base.id, blob_id_ptr + copied)) {
                                        ret = -EFAULT;
                                        goto done;
                                }

                                if (put_user(prop_blob->length, blob_length_ptr + copied)) {
                                        ret = -EFAULT;
                                        goto done;
                                }

                                copied++;
                        }
                }
                out_resp->count_enum_blobs = blob_count;
        }
done:
        mutex_unlock(&dev->mode_config.mutex);
        return ret;
}

static struct drm_property_blob *drm_property_create_blob(struct drm_device *dev, int length,
                                                          void *data)
{
        struct drm_property_blob *blob;

        if (!length || !data)
                return NULL;

        blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
        if (!blob)
                return NULL;

        blob->data = (void *)((char *)blob + sizeof(struct drm_property_blob));
        blob->length = length;

        memcpy(blob->data, data, length);

        drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB);

        list_add_tail(&blob->head, &dev->mode_config.property_blob_list);
        return blob;
}

static void drm_property_destroy_blob(struct drm_device *dev,
                               struct drm_property_blob *blob)
{
        drm_mode_object_put(dev, &blob->base);
        list_del(&blob->head);
        kfree(blob);
}

int drm_mode_getblob_ioctl(struct drm_device *dev,
                           void *data, struct drm_file *file_priv)
{
        struct drm_mode_object *obj;
        struct drm_mode_get_blob *out_resp = data;
        struct drm_property_blob *blob;
        int ret = 0;
        void *blob_ptr;

        mutex_lock(&dev->mode_config.mutex);
        obj = drm_mode_object_find(dev, out_resp->blob_id, DRM_MODE_OBJECT_BLOB);
        if (!obj) {
                ret = -EINVAL;
                goto done;
        }
        blob = obj_to_blob(obj);

        if (out_resp->length == blob->length) {
                blob_ptr = (void *)(unsigned long)out_resp->data;
                if (copy_to_user(blob_ptr, blob->data, blob->length)){
                        ret = -EFAULT;
                        goto done;
                }
        }
        out_resp->length = blob->length;

done:
        mutex_unlock(&dev->mode_config.mutex);
        return ret;
}

int drm_mode_connector_update_edid_property(struct drm_connector *connector,
                                            struct edid *edid)
{
        struct drm_device *dev = connector->dev;
        int ret = 0;

        if (connector->edid_blob_ptr)
                drm_property_destroy_blob(dev, connector->edid_blob_ptr);

        /* Delete edid, when there is none. */
        if (!edid) {
                connector->edid_blob_ptr = NULL;
                ret = drm_connector_property_set_value(connector, dev->mode_config.edid_property, 0);
                return ret;
        }

        connector->edid_blob_ptr = drm_property_create_blob(connector->dev, 128, edid);

        ret = drm_connector_property_set_value(connector,
                                               dev->mode_config.edid_property,
                                               connector->edid_blob_ptr->base.id);

        return ret;
}
EXPORT_SYMBOL(drm_mode_connector_update_edid_property);

int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
                                       void *data, struct drm_file *file_priv)
{
        struct drm_mode_connector_set_property *out_resp = data;
        struct drm_mode_object *obj;
        struct drm_property *property;
        struct drm_connector *connector;
        int ret = -EINVAL;
        int i;

        mutex_lock(&dev->mode_config.mutex);

        obj = drm_mode_object_find(dev, out_resp->connector_id, DRM_MODE_OBJECT_CONNECTOR);
        if (!obj) {
                goto out;
        }
        connector = obj_to_connector(obj);

        for (i = 0; i < DRM_CONNECTOR_MAX_PROPERTY; i++) {
                if (connector->property_ids[i] == out_resp->prop_id)
                        break;
        }

        if (i == DRM_CONNECTOR_MAX_PROPERTY) {
                goto out;
        }

        obj = drm_mode_object_find(dev, out_resp->prop_id, DRM_MODE_OBJECT_PROPERTY);
        if (!obj) {
                goto out;
        }
        property = obj_to_property(obj);

        if (property->flags & DRM_MODE_PROP_IMMUTABLE)
                goto out;

        if (property->flags & DRM_MODE_PROP_RANGE) {
                if (out_resp->value < property->values[0])
                        goto out;

                if (out_resp->value > property->values[1])
                        goto out;
        } else {
                int found = 0;
                for (i = 0; i < property->num_values; i++) {
                        if (property->values[i] == out_resp->value) {
                                found = 1;
                                break;
                        }
                }
                if (!found) {
                        goto out;
                }
        }

        /* Do DPMS ourselves */
        if (property == connector->dev->mode_config.dpms_property) {
                if (connector->funcs->dpms)
                        (*connector->funcs->dpms)(connector, (int) out_resp->value);
                ret = 0;
        } else if (connector->funcs->set_property)
                ret = connector->funcs->set_property(connector, property, out_resp->value);

        /* store the property value if succesful */
        if (!ret)
                drm_connector_property_set_value(connector, property, out_resp->value);
out:
        mutex_unlock(&dev->mode_config.mutex);
        return ret;
}

int drm_mode_connector_attach_encoder(struct drm_connector *connector,
                                      struct drm_encoder *encoder)
{
        int i;

        for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
                if (connector->encoder_ids[i] == 0) {
                        connector->encoder_ids[i] = encoder->base.id;
                        return 0;
                }
        }
        return -ENOMEM;
}
EXPORT_SYMBOL(drm_mode_connector_attach_encoder);

void drm_mode_connector_detach_encoder(struct drm_connector *connector,
                                    struct drm_encoder *encoder)
{
        int i;
        for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
                if (connector->encoder_ids[i] == encoder->base.id) {
                        connector->encoder_ids[i] = 0;
                        if (connector->encoder == encoder)
                                connector->encoder = NULL;
                        break;
                }
        }
}
EXPORT_SYMBOL(drm_mode_connector_detach_encoder);

bool drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
                                  int gamma_size)
{
        crtc->gamma_size = gamma_size;

        crtc->gamma_store = kzalloc(gamma_size * sizeof(uint16_t) * 3, GFP_KERNEL);
        if (!crtc->gamma_store) {
                crtc->gamma_size = 0;
                return false;
        }

        return true;
}
EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size);

int drm_mode_gamma_set_ioctl(struct drm_device *dev,
                             void *data, struct drm_file *file_priv)
{
        struct drm_mode_crtc_lut *crtc_lut = data;
        struct drm_mode_object *obj;
        struct drm_crtc *crtc;
        void *r_base, *g_base, *b_base;
        int size;
        int ret = 0;

        mutex_lock(&dev->mode_config.mutex);
        obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
        if (!obj) {
                ret = -EINVAL;
                goto out;
        }
        crtc = obj_to_crtc(obj);

        /* memcpy into gamma store */
        if (crtc_lut->gamma_size != crtc->gamma_size) {
                ret = -EINVAL;
                goto out;
        }

        size = crtc_lut->gamma_size * (sizeof(uint16_t));
        r_base = crtc->gamma_store;
        if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) {
                ret = -EFAULT;
                goto out;
        }

        g_base = r_base + size;
        if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) {
                ret = -EFAULT;
                goto out;
        }

        b_base = g_base + size;
        if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) {
                ret = -EFAULT;
                goto out;
        }

        crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size);

out:
        mutex_unlock(&dev->mode_config.mutex);
        return ret;

}

int drm_mode_gamma_get_ioctl(struct drm_device *dev,
                             void *data, struct drm_file *file_priv)
{
        struct drm_mode_crtc_lut *crtc_lut = data;
        struct drm_mode_object *obj;
        struct drm_crtc *crtc;
        void *r_base, *g_base, *b_base;
        int size;
        int ret = 0;

        mutex_lock(&dev->mode_config.mutex);
        obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
        if (!obj) {
                ret = -EINVAL;
                goto out;
        }
        crtc = obj_to_crtc(obj);

        /* memcpy into gamma store */
        if (crtc_lut->gamma_size != crtc->gamma_size) {
                ret = -EINVAL;
                goto out;
        }

        size = crtc_lut->gamma_size * (sizeof(uint16_t));
        r_base = crtc->gamma_store;
        if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) {
                ret = -EFAULT;
                goto out;
        }

        g_base = r_base + size;
        if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) {
                ret = -EFAULT;
                goto out;
        }

        b_base = g_base + size;
        if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) {
                ret = -EFAULT;
                goto out;
        }
out:
        mutex_unlock(&dev->mode_config.mutex);
        return ret;
}