exynos_drm_drv.c

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/*
 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
 * Authors:
 *  Inki Dae <[email protected]>
 *  Joonyoung Shim <[email protected]>
 *  Seung-Woo Kim <[email protected]>
 *
 * 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 (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>

#include <drm/exynos_drm.h>

#include "exynos_drm_drv.h"
#include "exynos_drm_crtc.h"
#include "exynos_drm_encoder.h"
#include "exynos_drm_fbdev.h"
#include "exynos_drm_fb.h"
#include "exynos_drm_gem.h"
#include "exynos_drm_plane.h"
#include "exynos_drm_vidi.h"
#include "exynos_drm_dmabuf.h"
#include "exynos_drm_g2d.h"

#define DRIVER_NAME "exynos"
#define DRIVER_DESC "Samsung SoC DRM"
#define DRIVER_DATE "20110530"
#define DRIVER_MAJOR    1
#define DRIVER_MINOR    0

#define VBLANK_OFF_DELAY    50000

static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
{
    struct exynos_drm_private *private;
    int ret;
    int nr;

    DRM_DEBUG_DRIVER("%s\n", __FILE__);

    private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
    if (!private) {
        DRM_ERROR("failed to allocate private\n");
        return -ENOMEM;
    }

    INIT_LIST_HEAD(&private->pageflip_event_list);
    dev->dev_private = (void *)private;

    drm_mode_config_init(dev);

    /* init kms poll for handling hpd */
    drm_kms_helper_poll_init(dev);

    exynos_drm_mode_config_init(dev);

    /*
     * EXYNOS4 is enough to have two CRTCs and each crtc would be used
     * without dependency of hardware.
     */
    for (nr = 0; nr < MAX_CRTC; nr++) {
        ret = exynos_drm_crtc_create(dev, nr);
        if (ret)
            goto err_crtc;
    }

    for (nr = 0; nr < MAX_PLANE; nr++) {
        struct drm_plane *plane;
        unsigned int possible_crtcs = (1 << MAX_CRTC) - 1;

        plane = exynos_plane_init(dev, possible_crtcs, false);
        if (!plane)
            goto err_crtc;
    }

    ret = drm_vblank_init(dev, MAX_CRTC);
    if (ret)
        goto err_crtc;

    /*
     * probe sub drivers such as display controller and hdmi driver,
     * that were registered at probe() of platform driver
     * to the sub driver and create encoder and connector for them.
     */
    ret = exynos_drm_device_register(dev);
    if (ret)
        goto err_vblank;

    /* setup possible_clones. */
    exynos_drm_encoder_setup(dev);

    /*
     * create and configure fb helper and also exynos specific
     * fbdev object.
     */
    ret = exynos_drm_fbdev_init(dev);
    if (ret) {
        DRM_ERROR("failed to initialize drm fbdev\n");
        goto err_drm_device;
    }

    drm_vblank_offdelay = VBLANK_OFF_DELAY;

    return 0;

err_drm_device:
    exynos_drm_device_unregister(dev);
err_vblank:
    drm_vblank_cleanup(dev);
err_crtc:
    drm_mode_config_cleanup(dev);
    kfree(private);

    return ret;
}

static int exynos_drm_unload(struct drm_device *dev)
{
    DRM_DEBUG_DRIVER("%s\n", __FILE__);

    exynos_drm_fbdev_fini(dev);
    exynos_drm_device_unregister(dev);
    drm_vblank_cleanup(dev);
    drm_kms_helper_poll_fini(dev);
    drm_mode_config_cleanup(dev);
    kfree(dev->dev_private);

    dev->dev_private = NULL;

    return 0;
}

static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
{
    struct drm_exynos_file_private *file_priv;

    DRM_DEBUG_DRIVER("%s\n", __FILE__);

    file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
    if (!file_priv)
        return -ENOMEM;

    file->driver_priv = file_priv;

    return exynos_drm_subdrv_open(dev, file);
}

static void exynos_drm_preclose(struct drm_device *dev,
                    struct drm_file *file)
{
    struct exynos_drm_private *private = dev->dev_private;
    struct drm_pending_vblank_event *e, *t;
    unsigned long flags;

    DRM_DEBUG_DRIVER("%s\n", __FILE__);

    /* release events of current file */
    spin_lock_irqsave(&dev->event_lock, flags);
    list_for_each_entry_safe(e, t, &private->pageflip_event_list,
            base.link) {
        if (e->base.file_priv == file) {
            list_del(&e->base.link);
            e->base.destroy(&e->base);
        }
    }
    spin_unlock_irqrestore(&dev->event_lock, flags);

    exynos_drm_subdrv_close(dev, file);
}

static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
{
    DRM_DEBUG_DRIVER("%s\n", __FILE__);

    if (!file->driver_priv)
        return;

    kfree(file->driver_priv);
    file->driver_priv = NULL;
}

static void exynos_drm_lastclose(struct drm_device *dev)
{
    DRM_DEBUG_DRIVER("%s\n", __FILE__);

    exynos_drm_fbdev_restore_mode(dev);
}

static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
    .fault = exynos_drm_gem_fault,
    .open = drm_gem_vm_open,
    .close = drm_gem_vm_close,
};

static struct drm_ioctl_desc exynos_ioctls[] = {
    DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
            DRM_UNLOCKED | DRM_AUTH),
    DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP_OFFSET,
            exynos_drm_gem_map_offset_ioctl, DRM_UNLOCKED |
            DRM_AUTH),
    DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MMAP,
            exynos_drm_gem_mmap_ioctl, DRM_UNLOCKED | DRM_AUTH),
    DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET,
            exynos_drm_gem_get_ioctl, DRM_UNLOCKED),
    DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION,
            vidi_connection_ioctl, DRM_UNLOCKED | DRM_AUTH),
    DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER,
            exynos_g2d_get_ver_ioctl, DRM_UNLOCKED | DRM_AUTH),
    DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST,
            exynos_g2d_set_cmdlist_ioctl, DRM_UNLOCKED | DRM_AUTH),
    DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC,
            exynos_g2d_exec_ioctl, DRM_UNLOCKED | DRM_AUTH),
};

static const struct file_operations exynos_drm_driver_fops = {
    .owner      = THIS_MODULE,
    .open       = drm_open,
    .mmap       = exynos_drm_gem_mmap,
    .poll       = drm_poll,
    .read       = drm_read,
    .unlocked_ioctl = drm_ioctl,
#ifdef CONFIG_COMPAT
    .compat_ioctl = drm_compat_ioctl,
#endif
    .release    = drm_release,
};

static struct drm_driver exynos_drm_driver = {
    .driver_features    = DRIVER_HAVE_IRQ | DRIVER_MODESET |
                    DRIVER_GEM | DRIVER_PRIME,
    .load           = exynos_drm_load,
    .unload         = exynos_drm_unload,
    .open           = exynos_drm_open,
    .preclose       = exynos_drm_preclose,
    .lastclose      = exynos_drm_lastclose,
    .postclose      = exynos_drm_postclose,
    .get_vblank_counter = drm_vblank_count,
    .enable_vblank      = exynos_drm_crtc_enable_vblank,
    .disable_vblank     = exynos_drm_crtc_disable_vblank,
    .gem_init_object    = exynos_drm_gem_init_object,
    .gem_free_object    = exynos_drm_gem_free_object,
    .gem_vm_ops     = &exynos_drm_gem_vm_ops,
    .dumb_create        = exynos_drm_gem_dumb_create,
    .dumb_map_offset    = exynos_drm_gem_dumb_map_offset,
    .dumb_destroy       = exynos_drm_gem_dumb_destroy,
    .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
    .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
    .gem_prime_export   = exynos_dmabuf_prime_export,
    .gem_prime_import   = exynos_dmabuf_prime_import,
    .ioctls         = exynos_ioctls,
    .fops           = &exynos_drm_driver_fops,
    .name   = DRIVER_NAME,
    .desc   = DRIVER_DESC,
    .date   = DRIVER_DATE,
    .major  = DRIVER_MAJOR,
    .minor  = DRIVER_MINOR,
};

static int exynos_drm_platform_probe(struct platform_device *pdev)
{
    DRM_DEBUG_DRIVER("%s\n", __FILE__);

    exynos_drm_driver.num_ioctls = DRM_ARRAY_SIZE(exynos_ioctls);

    return drm_platform_init(&exynos_drm_driver, pdev);
}

static int exynos_drm_platform_remove(struct platform_device *pdev)
{
    DRM_DEBUG_DRIVER("%s\n", __FILE__);

    drm_platform_exit(&exynos_drm_driver, pdev);

    return 0;
}

static struct platform_driver exynos_drm_platform_driver = {
    .probe      = exynos_drm_platform_probe,
    .remove     = __devexit_p(exynos_drm_platform_remove),
    .driver     = {
        .owner  = THIS_MODULE,
        .name   = "exynos-drm",
    },
};

static int __init exynos_drm_init(void)
{
    int ret;

    DRM_DEBUG_DRIVER("%s\n", __FILE__);

#ifdef CONFIG_DRM_EXYNOS_FIMD
    ret = platform_driver_register(&fimd_driver);
    if (ret < 0)
        goto out_fimd;
#endif

#ifdef CONFIG_DRM_EXYNOS_HDMI
    ret = platform_driver_register(&hdmi_driver);
    if (ret < 0)
        goto out_hdmi;
    ret = platform_driver_register(&mixer_driver);
    if (ret < 0)
        goto out_mixer;
    ret = platform_driver_register(&exynos_drm_common_hdmi_driver);
    if (ret < 0)
        goto out_common_hdmi;
#endif

#ifdef CONFIG_DRM_EXYNOS_VIDI
    ret = platform_driver_register(&vidi_driver);
    if (ret < 0)
        goto out_vidi;
#endif

#ifdef CONFIG_DRM_EXYNOS_G2D
    ret = platform_driver_register(&g2d_driver);
    if (ret < 0)
        goto out_g2d;
#endif

    ret = platform_driver_register(&exynos_drm_platform_driver);
    if (ret < 0)
        goto out;

    return 0;

out:
#ifdef CONFIG_DRM_EXYNOS_G2D
    platform_driver_unregister(&g2d_driver);
out_g2d:
#endif

#ifdef CONFIG_DRM_EXYNOS_VIDI
out_vidi:
    platform_driver_unregister(&vidi_driver);
#endif

#ifdef CONFIG_DRM_EXYNOS_HDMI
    platform_driver_unregister(&exynos_drm_common_hdmi_driver);
out_common_hdmi:
    platform_driver_unregister(&mixer_driver);
out_mixer:
    platform_driver_unregister(&hdmi_driver);
out_hdmi:
#endif

#ifdef CONFIG_DRM_EXYNOS_FIMD
    platform_driver_unregister(&fimd_driver);
out_fimd:
#endif
    return ret;
}

static void __exit exynos_drm_exit(void)
{
    DRM_DEBUG_DRIVER("%s\n", __FILE__);

    platform_driver_unregister(&exynos_drm_platform_driver);

#ifdef CONFIG_DRM_EXYNOS_G2D
    platform_driver_unregister(&g2d_driver);
#endif

#ifdef CONFIG_DRM_EXYNOS_HDMI
    platform_driver_unregister(&exynos_drm_common_hdmi_driver);
    platform_driver_unregister(&mixer_driver);
    platform_driver_unregister(&hdmi_driver);
#endif

#ifdef CONFIG_DRM_EXYNOS_VIDI
    platform_driver_unregister(&vidi_driver);
#endif

#ifdef CONFIG_DRM_EXYNOS_FIMD
    platform_driver_unregister(&fimd_driver);
#endif
}

module_init(exynos_drm_init);
module_exit(exynos_drm_exit);

MODULE_AUTHOR("Inki Dae <[email protected]>");
MODULE_AUTHOR("Joonyoung Shim <[email protected]>");
MODULE_AUTHOR("Seung-Woo Kim <[email protected]>");
MODULE_DESCRIPTION("Samsung SoC DRM Driver");
MODULE_LICENSE("GPL");