linux-imx

/*

 * Copyright (C) 2017 Samsung Electronics Co.Ltd

 * Authors:

 *  Marek Szyprowski <m.szyprowski@samsung.com>

 *

 * Exynos DRM Image Post Processing (IPP) related functions

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 */

​

​

#include <drm/drmP.h>

#include <drm/drm_mode.h>

#include <uapi/drm/exynos_drm.h>

​

#include "exynos_drm_drv.h"

#include "exynos_drm_gem.h"

#include "exynos_drm_ipp.h"

​

static int num_ipp;

static LIST_HEAD(ipp_list);

​

/**

 * exynos_drm_ipp_register - Register a new picture processor hardware module

 * @dev: DRM device

 * @ipp: ipp module to init

 * @funcs: callbacks for the new ipp object

 * @caps: bitmask of ipp capabilities (%DRM_EXYNOS_IPP_CAP_*)

 * @formats: array of supported formats

 * @num_formats: size of the supported formats array

 * @name: name (for debugging purposes)

 *

 * Initializes a ipp module.

 *

 * Returns:

 * Zero on success, error code on failure.

 */

int exynos_drm_ipp_register(struct device *dev, struct exynos_drm_ipp *ipp,

        const struct exynos_drm_ipp_funcs *funcs, unsigned int caps,

        const struct exynos_drm_ipp_formats *formats,

        unsigned int num_formats, const char *name)

{

    WARN_ON(!ipp);

    WARN_ON(!funcs);

    WARN_ON(!formats);

    WARN_ON(!num_formats);

​

    spin_lock_init(&ipp->lock);

    INIT_LIST_HEAD(&ipp->todo_list);

    init_waitqueue_head(&ipp->done_wq);

    ipp->dev = dev;

    ipp->funcs = funcs;

    ipp->capabilities = caps;

    ipp->name = name;

    ipp->formats = formats;

    ipp->num_formats = num_formats;

​

    /* ipp_list modification is serialized by component framework */

    list_add_tail(&ipp->head, &ipp_list);

    ipp->id = num_ipp++;

​

    DRM_DEV_DEBUG_DRIVER(dev, "Registered ipp %d\n", ipp->id);

​

    return 0;

}

​

/**

 * exynos_drm_ipp_unregister - Unregister the picture processor module

 * @dev: DRM device

 * @ipp: ipp module

 */

void exynos_drm_ipp_unregister(struct device *dev,

                   struct exynos_drm_ipp *ipp)

{

    WARN_ON(ipp->task);

    WARN_ON(!list_empty(&ipp->todo_list));

    list_del(&ipp->head);

}

​

/**

 * exynos_drm_ipp_ioctl_get_res_ioctl - enumerate all ipp modules

 * @dev: DRM device

 * @data: ioctl data

 * @file_priv: DRM file info