linux-imx

/*

 * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org

 *

 * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California.

 * All Rights Reserved.

 *

 * Author Rickard E. (Rik) Faith <faith@valinux.com>

 *

 * 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

 * PRECISION INSIGHT 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 <linux/debugfs.h>

#include <linux/fs.h>

#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/mount.h>

#include <linux/slab.h>

#include <linux/srcu.h>

​

#include <drm/drm_client.h>

#include <drm/drm_drv.h>

#include <drm/drmP.h>

​

#include "drm_crtc_internal.h"

#include "drm_legacy.h"

#include "drm_internal.h"

​

/*

 * drm_debug: Enable debug output.

 * Bitmask of DRM_UT_x. See include/drm/drmP.h for details.

 */

unsigned int drm_debug = 0;

EXPORT_SYMBOL(drm_debug);

​

MODULE_AUTHOR("Gareth Hughes, Leif Delgass, José Fonseca, Jon Smirl");

MODULE_DESCRIPTION("DRM shared core routines");

MODULE_LICENSE("GPL and additional rights");

MODULE_PARM_DESC(debug, "Enable debug output, where each bit enables a debug category.\n"

"\t\tBit 0 (0x01)  will enable CORE messages (drm core code)\n"

"\t\tBit 1 (0x02)  will enable DRIVER messages (drm controller code)\n"

"\t\tBit 2 (0x04)  will enable KMS messages (modesetting code)\n"

"\t\tBit 3 (0x08)  will enable PRIME messages (prime code)\n"

"\t\tBit 4 (0x10)  will enable ATOMIC messages (atomic code)\n"

"\t\tBit 5 (0x20)  will enable VBL messages (vblank code)\n"

"\t\tBit 7 (0x80)  will enable LEASE messages (leasing code)\n"

"\t\tBit 8 (0x100) will enable DP messages (displayport code)");

module_param_named(debug, drm_debug, int, 0600);

​

static DEFINE_SPINLOCK(drm_minor_lock);

static struct idr drm_minors_idr;

​

/*

 * If the drm core fails to init for whatever reason,

 * we should prevent any drivers from registering with it.

 * It's best to check this at drm_dev_init(), as some drivers

 * prefer to embed struct drm_device into their own device

 * structure and call drm_dev_init() themselves.

 */

static bool drm_core_init_complete = false;

​

static struct dentry *drm_debugfs_root;

​

DEFINE_STATIC_SRCU(drm_unplug_srcu);

​

/*

 * DRM Minors

 * A DRM device can provide several char-dev interfaces on the DRM-Major. Each

 * of them is represented by a drm_minor object. Depending on the capabilities

 * of the device-driver, different interfaces are registered.

 *

 * Minors can be accessed via dev->$minor_name. This pointer is either

 * NULL or a valid drm_minor pointer and stays valid as long as the device is

 * valid. This means, DRM minors have the same life-time as the underlying

 * device. However, this doesn't mean that the minor is active. Minors are

 * registered and unregistered dynamically according to device-state.