Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 714 insertions, 0 deletions

diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
new file mode 100644
index 000000000..e57d0440f
--- /dev/null
+++ b/include/drm/drm_drv.h
@@ -0,0 +1,714 @@
+/*
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * Copyright (c) 2009-2010, Code Aurora Forum.
+ * Copyright 2016 Intel Corp.
+ *
+ * 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.
+ */
+
+#ifndef _DRM_DRV_H_
+#define _DRM_DRV_H_
+
+#include <linux/list.h>
+#include <linux/irqreturn.h>
+
+#include <drm/drm_device.h>
+
+struct drm_file;
+struct drm_gem_object;
+struct drm_master;
+struct drm_minor;
+struct dma_buf_attachment;
+struct drm_display_mode;
+struct drm_mode_create_dumb;
+struct drm_printer;
+
+/**
+ * enum drm_driver_feature - feature flags
+ *
+ * See &drm_driver.driver_features, drm_device.driver_features and
+ * drm_core_check_feature().
+ */
+enum drm_driver_feature {
+	/**
+	 * @DRIVER_GEM:
+	 *
+	 * Driver use the GEM memory manager. This should be set for all modern
+	 * drivers.
+	 */
+	DRIVER_GEM			= BIT(0),
+	/**
+	 * @DRIVER_MODESET:
+	 *
+	 * Driver supports mode setting interfaces (KMS).
+	 */
+	DRIVER_MODESET			= BIT(1),
+	/**
+	 * @DRIVER_RENDER:
+	 *
+	 * Driver supports dedicated render nodes. See also the :ref:`section on
+	 * render nodes <drm_render_node>` for details.
+	 */
+	DRIVER_RENDER			= BIT(3),
+	/**
+	 * @DRIVER_ATOMIC:
+	 *
+	 * Driver supports the full atomic modesetting userspace API. Drivers
+	 * which only use atomic internally, but do not the support the full
+	 * userspace API (e.g. not all properties converted to atomic, or
+	 * multi-plane updates are not guaranteed to be tear-free) should not
+	 * set this flag.
+	 */
+	DRIVER_ATOMIC			= BIT(4),
+	/**
+	 * @DRIVER_SYNCOBJ:
+	 *
+	 * Driver supports &drm_syncobj for explicit synchronization of command
+	 * submission.
+	 */
+	DRIVER_SYNCOBJ                  = BIT(5),
+	/**
+	 * @DRIVER_SYNCOBJ_TIMELINE:
+	 *
+	 * Driver supports the timeline flavor of &drm_syncobj for explicit
+	 * synchronization of command submission.
+	 */
+	DRIVER_SYNCOBJ_TIMELINE         = BIT(6),
+
+	/* IMPORTANT: Below are all the legacy flags, add new ones above. */
+
+	/**
+	 * @DRIVER_USE_AGP:
+	 *
+	 * Set up DRM AGP support, see drm_agp_init(), the DRM core will manage
+	 * AGP resources. New drivers don't need this.
+	 */
+	DRIVER_USE_AGP			= BIT(25),
+	/**
+	 * @DRIVER_LEGACY:
+	 *
+	 * Denote a legacy driver using shadow attach. Do not use.
+	 */
+	DRIVER_LEGACY			= BIT(26),
+	/**
+	 * @DRIVER_PCI_DMA:
+	 *
+	 * Driver is capable of PCI DMA, mapping of PCI DMA buffers to userspace
+	 * will be enabled. Only for legacy drivers. Do not use.
+	 */
+	DRIVER_PCI_DMA			= BIT(27),
+	/**
+	 * @DRIVER_SG:
+	 *
+	 * Driver can perform scatter/gather DMA, allocation and mapping of
+	 * scatter/gather buffers will be enabled. Only for legacy drivers. Do
+	 * not use.
+	 */
+	DRIVER_SG			= BIT(28),
+
+	/**
+	 * @DRIVER_HAVE_DMA:
+	 *
+	 * Driver supports DMA, the userspace DMA API will be supported. Only
+	 * for legacy drivers. Do not use.
+	 */
+	DRIVER_HAVE_DMA			= BIT(29),
+	/**
+	 * @DRIVER_HAVE_IRQ:
+	 *
+	 * Legacy irq support. Only for legacy drivers. Do not use.
+	 *
+	 * New drivers can either use the drm_irq_install() and
+	 * drm_irq_uninstall() helper functions, or roll their own irq support
+	 * code by calling request_irq() directly.
+	 */
+	DRIVER_HAVE_IRQ			= BIT(30),
+	/**
+	 * @DRIVER_KMS_LEGACY_CONTEXT:
+	 *
+	 * Used only by nouveau for backwards compatibility with existing
+	 * userspace.  Do not use.
+	 */
+	DRIVER_KMS_LEGACY_CONTEXT	= BIT(31),
+};
+
+/**
+ * struct drm_driver - DRM driver structure
+ *
+ * This structure represent the common code for a family of cards. There will be
+ * one &struct drm_device for each card present in this family. It contains lots
+ * of vfunc entries, and a pile of those probably should be moved to more
+ * appropriate places like &drm_mode_config_funcs or into a new operations
+ * structure for GEM drivers.
+ */
+struct drm_driver {
+	/**
+	 * @load:
+	 *
+	 * Backward-compatible driver callback to complete initialization steps
+	 * after the driver is registered.  For this reason, may suffer from
+	 * race conditions and its use is deprecated for new drivers.  It is
+	 * therefore only supported for existing drivers not yet converted to
+	 * the new scheme.  See devm_drm_dev_alloc() and drm_dev_register() for
+	 * proper and race-free way to set up a &struct drm_device.
+	 *
+	 * This is deprecated, do not use!
+	 *
+	 * Returns:
+	 *
+	 * Zero on success, non-zero value on failure.
+	 */
+	int (*load) (struct drm_device *, unsigned long flags);
+
+	/**
+	 * @open:
+	 *
+	 * Driver callback when a new &struct drm_file is opened. Useful for
+	 * setting up driver-private data structures like buffer allocators,
+	 * execution contexts or similar things. Such driver-private resources
+	 * must be released again in @postclose.
+	 *
+	 * Since the display/modeset side of DRM can only be owned by exactly
+	 * one &struct drm_file (see &drm_file.is_master and &drm_device.master)
+	 * there should never be a need to set up any modeset related resources
+	 * in this callback. Doing so would be a driver design bug.
+	 *
+	 * Returns:
+	 *
+	 * 0 on success, a negative error code on failure, which will be
+	 * promoted to userspace as the result of the open() system call.
+	 */
+	int (*open) (struct drm_device *, struct drm_file *);
+
+	/**
+	 * @postclose:
+	 *
+	 * One of the driver callbacks when a new &struct drm_file is closed.
+	 * Useful for tearing down driver-private data structures allocated in
+	 * @open like buffer allocators, execution contexts or similar things.
+	 *
+	 * Since the display/modeset side of DRM can only be owned by exactly
+	 * one &struct drm_file (see &drm_file.is_master and &drm_device.master)
+	 * there should never be a need to tear down any modeset related
+	 * resources in this callback. Doing so would be a driver design bug.
+	 */
+	void (*postclose) (struct drm_device *, struct drm_file *);
+
+	/**
+	 * @lastclose:
+	 *
+	 * Called when the last &struct drm_file has been closed and there's
+	 * currently no userspace client for the &struct drm_device.
+	 *
+	 * Modern drivers should only use this to force-restore the fbdev
+	 * framebuffer using drm_fb_helper_restore_fbdev_mode_unlocked().
+	 * Anything else would indicate there's something seriously wrong.
+	 * Modern drivers can also use this to execute delayed power switching
+	 * state changes, e.g. in conjunction with the :ref:`vga_switcheroo`
+	 * infrastructure.
+	 *
+	 * This is called after @postclose hook has been called.
+	 *
+	 * NOTE:
+	 *
+	 * All legacy drivers use this callback to de-initialize the hardware.
+	 * This is purely because of the shadow-attach model, where the DRM
+	 * kernel driver does not really own the hardware. Instead ownershipe is
+	 * handled with the help of userspace through an inheritedly racy dance
+	 * to set/unset the VT into raw mode.
+	 *
+	 * Legacy drivers initialize the hardware in the @firstopen callback,
+	 * which isn't even called for modern drivers.
+	 */
+	void (*lastclose) (struct drm_device *);
+
+	/**
+	 * @unload:
+	 *
+	 * Reverse the effects of the driver load callback.  Ideally,
+	 * the clean up performed by the driver should happen in the
+	 * reverse order of the initialization.  Similarly to the load
+	 * hook, this handler is deprecated and its usage should be
+	 * dropped in favor of an open-coded teardown function at the
+	 * driver layer.  See drm_dev_unregister() and drm_dev_put()
+	 * for the proper way to remove a &struct drm_device.
+	 *
+	 * The unload() hook is called right after unregistering
+	 * the device.
+	 *
+	 */
+	void (*unload) (struct drm_device *);
+
+	/**
+	 * @release:
+	 *
+	 * Optional callback for destroying device data after the final
+	 * reference is released, i.e. the device is being destroyed.
+	 *
+	 * This is deprecated, clean up all memory allocations associated with a
+	 * &drm_device using drmm_add_action(), drmm_kmalloc() and related
+	 * managed resources functions.
+	 */
+	void (*release) (struct drm_device *);
+
+	/**
+	 * @irq_handler:
+	 *
+	 * Interrupt handler called when using drm_irq_install(). Not used by
+	 * drivers which implement their own interrupt handling.
+	 */
+	irqreturn_t(*irq_handler) (int irq, void *arg);
+
+	/**
+	 * @irq_preinstall:
+	 *
+	 * Optional callback used by drm_irq_install() which is called before
+	 * the interrupt handler is registered. This should be used to clear out
+	 * any pending interrupts (from e.g. firmware based drives) and reset
+	 * the interrupt handling registers.
+	 */
+	void (*irq_preinstall) (struct drm_device *dev);
+
+	/**
+	 * @irq_postinstall:
+	 *
+	 * Optional callback used by drm_irq_install() which is called after
+	 * the interrupt handler is registered. This should be used to enable
+	 * interrupt generation in the hardware.
+	 */
+	int (*irq_postinstall) (struct drm_device *dev);
+
+	/**
+	 * @irq_uninstall:
+	 *
+	 * Optional callback used by drm_irq_uninstall() which is called before
+	 * the interrupt handler is unregistered. This should be used to disable
+	 * interrupt generation in the hardware.
+	 */
+	void (*irq_uninstall) (struct drm_device *dev);
+
+	/**
+	 * @master_set:
+	 *
+	 * Called whenever the minor master is set. Only used by vmwgfx.
+	 */
+	void (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
+			   bool from_open);
+	/**
+	 * @master_drop:
+	 *
+	 * Called whenever the minor master is dropped. Only used by vmwgfx.
+	 */
+	void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv);
+
+	/**
+	 * @debugfs_init:
+	 *
+	 * Allows drivers to create driver-specific debugfs files.
+	 */
+	void (*debugfs_init)(struct drm_minor *minor);
+
+	/**
+	 * @gem_free_object_unlocked: deconstructor for drm_gem_objects
+	 *
+	 * This is deprecated and should not be used by new drivers. Use
+	 * &drm_gem_object_funcs.free instead.
+	 */
+	void (*gem_free_object_unlocked) (struct drm_gem_object *obj);
+
+	/**
+	 * @gem_open_object:
+	 *
+	 * This callback is deprecated in favour of &drm_gem_object_funcs.open.
+	 *
+	 * Driver hook called upon gem handle creation
+	 */
+	int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
+
+	/**
+	 * @gem_close_object:
+	 *
+	 * This callback is deprecated in favour of &drm_gem_object_funcs.close.
+	 *
+	 * Driver hook called upon gem handle release
+	 */
+	void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
+
+	/**
+	 * @gem_create_object: constructor for gem objects
+	 *
+	 * Hook for allocating the GEM object struct, for use by the CMA and
+	 * SHMEM GEM helpers.
+	 */
+	struct drm_gem_object *(*gem_create_object)(struct drm_device *dev,
+						    size_t size);
+	/**
+	 * @prime_handle_to_fd:
+	 *
+	 * Main PRIME export function. Should be implemented with
+	 * drm_gem_prime_handle_to_fd() for GEM based drivers.
+	 *
+	 * For an in-depth discussion see :ref:`PRIME buffer sharing
+	 * documentation <prime_buffer_sharing>`.
+	 */
+	int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
+				uint32_t handle, uint32_t flags, int *prime_fd);
+	/**
+	 * @prime_fd_to_handle:
+	 *
+	 * Main PRIME import function. Should be implemented with
+	 * drm_gem_prime_fd_to_handle() for GEM based drivers.
+	 *
+	 * For an in-depth discussion see :ref:`PRIME buffer sharing
+	 * documentation <prime_buffer_sharing>`.
+	 */
+	int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
+				int prime_fd, uint32_t *handle);
+	/**
+	 * @gem_prime_export:
+	 *
+	 * Export hook for GEM drivers. Deprecated in favour of
+	 * &drm_gem_object_funcs.export.
+	 */
+	struct dma_buf * (*gem_prime_export)(struct drm_gem_object *obj,
+					     int flags);
+	/**
+	 * @gem_prime_import:
+	 *
+	 * Import hook for GEM drivers.
+	 *
+	 * This defaults to drm_gem_prime_import() if not set.
+	 */
+	struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
+				struct dma_buf *dma_buf);
+
+	/**
+	 * @gem_prime_pin:
+	 *
+	 * Deprecated hook in favour of &drm_gem_object_funcs.pin.
+	 */
+	int (*gem_prime_pin)(struct drm_gem_object *obj);
+
+	/**
+	 * @gem_prime_unpin:
+	 *
+	 * Deprecated hook in favour of &drm_gem_object_funcs.unpin.
+	 */
+	void (*gem_prime_unpin)(struct drm_gem_object *obj);
+
+
+	/**
+	 * @gem_prime_get_sg_table:
+	 *
+	 * Deprecated hook in favour of &drm_gem_object_funcs.get_sg_table.
+	 */
+	struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
+
+	/**
+	 * @gem_prime_import_sg_table:
+	 *
+	 * Optional hook used by the PRIME helper functions
+	 * drm_gem_prime_import() respectively drm_gem_prime_import_dev().
+	 */
+	struct drm_gem_object *(*gem_prime_import_sg_table)(
+				struct drm_device *dev,
+				struct dma_buf_attachment *attach,
+				struct sg_table *sgt);
+	/**
+	 * @gem_prime_vmap:
+	 *
+	 * Deprecated vmap hook for GEM drivers. Please use
+	 * &drm_gem_object_funcs.vmap instead.
+	 */
+	void *(*gem_prime_vmap)(struct drm_gem_object *obj);
+
+	/**
+	 * @gem_prime_vunmap:
+	 *
+	 * Deprecated vunmap hook for GEM drivers. Please use
+	 * &drm_gem_object_funcs.vunmap instead.
+	 */
+	void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
+
+	/**
+	 * @gem_prime_mmap:
+	 *
+	 * mmap hook for GEM drivers, used to implement dma-buf mmap in the
+	 * PRIME helpers.
+	 *
+	 * FIXME: There's way too much duplication going on here, and also moved
+	 * to &drm_gem_object_funcs.
+	 */
+	int (*gem_prime_mmap)(struct drm_gem_object *obj,
+				struct vm_area_struct *vma);
+
+	/**
+	 * @dumb_create:
+	 *
+	 * This creates a new dumb buffer in the driver's backing storage manager (GEM,
+	 * TTM or something else entirely) and returns the resulting buffer handle. This
+	 * handle can then be wrapped up into a framebuffer modeset object.
+	 *
+	 * Note that userspace is not allowed to use such objects for render
+	 * acceleration - drivers must create their own private ioctls for such a use
+	 * case.
+	 *
+	 * Width, height and depth are specified in the &drm_mode_create_dumb
+	 * argument. The callback needs to fill the handle, pitch and size for
+	 * the created buffer.
+	 *
+	 * Called by the user via ioctl.
+	 *
+	 * Returns:
+	 *
+	 * Zero on success, negative errno on failure.
+	 */
+	int (*dumb_create)(struct drm_file *file_priv,
+			   struct drm_device *dev,
+			   struct drm_mode_create_dumb *args);
+	/**
+	 * @dumb_map_offset:
+	 *
+	 * Allocate an offset in the drm device node's address space to be able to
+	 * memory map a dumb buffer.
+	 *
+	 * The default implementation is drm_gem_create_mmap_offset(). GEM based
+	 * drivers must not overwrite this.
+	 *
+	 * Called by the user via ioctl.
+	 *
+	 * Returns:
+	 *
+	 * Zero on success, negative errno on failure.
+	 */
+	int (*dumb_map_offset)(struct drm_file *file_priv,
+			       struct drm_device *dev, uint32_t handle,
+			       uint64_t *offset);
+	/**
+	 * @dumb_destroy:
+	 *
+	 * This destroys the userspace handle for the given dumb backing storage buffer.
+	 * Since buffer objects must be reference counted in the kernel a buffer object
+	 * won't be immediately freed if a framebuffer modeset object still uses it.
+	 *
+	 * Called by the user via ioctl.
+	 *
+	 * The default implementation is drm_gem_dumb_destroy(). GEM based drivers
+	 * must not overwrite this.
+	 *
+	 * Returns:
+	 *
+	 * Zero on success, negative errno on failure.
+	 */
+	int (*dumb_destroy)(struct drm_file *file_priv,
+			    struct drm_device *dev,
+			    uint32_t handle);
+
+	/**
+	 * @gem_vm_ops: Driver private ops for this object
+	 *
+	 * For GEM drivers this is deprecated in favour of
+	 * &drm_gem_object_funcs.vm_ops.
+	 */
+	const struct vm_operations_struct *gem_vm_ops;
+
+	/** @major: driver major number */
+	int major;
+	/** @minor: driver minor number */
+	int minor;
+	/** @patchlevel: driver patch level */
+	int patchlevel;
+	/** @name: driver name */
+	char *name;
+	/** @desc: driver description */
+	char *desc;
+	/** @date: driver date */
+	char *date;
+
+	/**
+	 * @driver_features:
+	 * Driver features, see &enum drm_driver_feature. Drivers can disable
+	 * some features on a per-instance basis using
+	 * &drm_device.driver_features.
+	 */
+	u32 driver_features;
+
+	/**
+	 * @ioctls:
+	 *
+	 * Array of driver-private IOCTL description entries. See the chapter on
+	 * :ref:`IOCTL support in the userland interfaces
+	 * chapter<drm_driver_ioctl>` for the full details.
+	 */
+
+	const struct drm_ioctl_desc *ioctls;
+	/** @num_ioctls: Number of entries in @ioctls. */
+	int num_ioctls;
+
+	/**
+	 * @fops:
+	 *
+	 * File operations for the DRM device node. See the discussion in
+	 * :ref:`file operations<drm_driver_fops>` for in-depth coverage and
+	 * some examples.
+	 */
+	const struct file_operations *fops;
+
+	/* Everything below here is for legacy driver, never use! */
+	/* private: */
+
+	/* List of devices hanging off this driver with stealth attach. */
+	struct list_head legacy_dev_list;
+	int (*firstopen) (struct drm_device *);
+	void (*preclose) (struct drm_device *, struct drm_file *file_priv);
+	int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
+	int (*dma_quiescent) (struct drm_device *);
+	int (*context_dtor) (struct drm_device *dev, int context);
+	u32 (*get_vblank_counter)(struct drm_device *dev, unsigned int pipe);
+	int (*enable_vblank)(struct drm_device *dev, unsigned int pipe);
+	void (*disable_vblank)(struct drm_device *dev, unsigned int pipe);
+	int dev_priv_size;
+};
+
+void *__devm_drm_dev_alloc(struct device *parent, struct drm_driver *driver,
+			   size_t size, size_t offset);
+
+/**
+ * devm_drm_dev_alloc - Resource managed allocation of a &drm_device instance
+ * @parent: Parent device object
+ * @driver: DRM driver
+ * @type: the type of the struct which contains struct &drm_device
+ * @member: the name of the &drm_device within @type.
+ *
+ * This allocates and initialize a new DRM device. No device registration is done.
+ * Call drm_dev_register() to advertice the device to user space and register it
+ * with other core subsystems. This should be done last in the device
+ * initialization sequence to make sure userspace can't access an inconsistent
+ * state.
+ *
+ * The initial ref-count of the object is 1. Use drm_dev_get() and
+ * drm_dev_put() to take and drop further ref-counts.
+ *
+ * It is recommended that drivers embed &struct drm_device into their own device
+ * structure.
+ *
+ * Note that this manages the lifetime of the resulting &drm_device
+ * automatically using devres. The DRM device initialized with this function is
+ * automatically put on driver detach using drm_dev_put().
+ *
+ * RETURNS:
+ * Pointer to new DRM device, or ERR_PTR on failure.
+ */
+#define devm_drm_dev_alloc(parent, driver, type, member) \
+	((type *) __devm_drm_dev_alloc(parent, driver, sizeof(type), \
+				       offsetof(type, member)))
+
+struct drm_device *drm_dev_alloc(struct drm_driver *driver,
+				 struct device *parent);
+int drm_dev_register(struct drm_device *dev, unsigned long flags);
+void drm_dev_unregister(struct drm_device *dev);
+
+void drm_dev_get(struct drm_device *dev);
+void drm_dev_put(struct drm_device *dev);
+void drm_put_dev(struct drm_device *dev);
+bool drm_dev_enter(struct drm_device *dev, int *idx);
+void drm_dev_exit(int idx);
+void drm_dev_unplug(struct drm_device *dev);
+
+/**
+ * drm_dev_is_unplugged - is a DRM device unplugged
+ * @dev: DRM device
+ *
+ * This function can be called to check whether a hotpluggable is unplugged.
+ * Unplugging itself is singalled through drm_dev_unplug(). If a device is
+ * unplugged, these two functions guarantee that any store before calling
+ * drm_dev_unplug() is visible to callers of this function after it completes
+ *
+ * WARNING: This function fundamentally races against drm_dev_unplug(). It is
+ * recommended that drivers instead use the underlying drm_dev_enter() and
+ * drm_dev_exit() function pairs.
+ */
+static inline bool drm_dev_is_unplugged(struct drm_device *dev)
+{
+	int idx;
+
+	if (drm_dev_enter(dev, &idx)) {
+		drm_dev_exit(idx);
+		return false;
+	}
+
+	return true;
+}
+
+/**
+ * drm_core_check_all_features - check driver feature flags mask
+ * @dev: DRM device to check
+ * @features: feature flag(s) mask
+ *
+ * This checks @dev for driver features, see &drm_driver.driver_features,
+ * &drm_device.driver_features, and the various &enum drm_driver_feature flags.
+ *
+ * Returns true if all features in the @features mask are supported, false
+ * otherwise.
+ */
+static inline bool drm_core_check_all_features(const struct drm_device *dev,
+					       u32 features)
+{
+	u32 supported = dev->driver->driver_features & dev->driver_features;
+
+	return features && (supported & features) == features;
+}
+
+/**
+ * drm_core_check_feature - check driver feature flags
+ * @dev: DRM device to check
+ * @feature: feature flag
+ *
+ * This checks @dev for driver features, see &drm_driver.driver_features,
+ * &drm_device.driver_features, and the various &enum drm_driver_feature flags.
+ *
+ * Returns true if the @feature is supported, false otherwise.
+ */
+static inline bool drm_core_check_feature(const struct drm_device *dev,
+					  enum drm_driver_feature feature)
+{
+	return drm_core_check_all_features(dev, feature);
+}
+
+/**
+ * drm_drv_uses_atomic_modeset - check if the driver implements
+ * atomic_commit()
+ * @dev: DRM device
+ *
+ * This check is useful if drivers do not have DRIVER_ATOMIC set but
+ * have atomic modesetting internally implemented.
+ */
+static inline bool drm_drv_uses_atomic_modeset(struct drm_device *dev)
+{
+	return drm_core_check_feature(dev, DRIVER_ATOMIC) ||
+		(dev->mode_config.funcs && dev->mode_config.funcs->atomic_commit != NULL);
+}
+
+
+int drm_dev_set_unique(struct drm_device *dev, const char *name);
+
+
+#endif