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Name	Size	Permission
bridge	[ DIR ]	drwxr-xr-x
i2c	[ DIR ]	drwxr-xr-x
tinydrm	[ DIR ]	drwxr-xr-x
ttm	[ DIR ]	drwxr-xr-x
amd_asic_type.h	1.54 KB	-rw-r--r--
ati_pcigart.h	731 B	-rw-r--r--
drmP.h	10.84 KB	-rw-r--r--
drm_agpsupport.h	3.81 KB	-rw-r--r--
drm_atomic.h	30.49 KB	-rw-r--r--
drm_atomic_helper.h	10.7 KB	-rw-r--r--
drm_auth.h	3.4 KB	-rw-r--r--
drm_blend.h	2.05 KB	-rw-r--r--
drm_bridge.h	10.06 KB	-rw-r--r--
drm_cache.h	2.81 KB	-rw-r--r--
drm_color_mgmt.h	1.55 KB	-rw-r--r--
drm_connector.h	34.96 KB	-rw-r--r--
drm_crtc.h	32.42 KB	-rw-r--r--
drm_crtc_helper.h	3.27 KB	-rw-r--r--
drm_debugfs.h	3.36 KB	-rw-r--r--
drm_debugfs_crc.h	2.66 KB	-rw-r--r--
drm_device.h	5.58 KB	-rw-r--r--
drm_displayid.h	3.24 KB	-rw-r--r--
drm_dp_dual_mode_helper.h	4.43 KB	-rw-r--r--
drm_dp_helper.h	44.09 KB	-rw-r--r--
drm_dp_mst_helper.h	16.83 KB	-rw-r--r--
drm_drv.h	20.51 KB	-rw-r--r--
drm_edid.h	15.33 KB	-rw-r--r--
drm_encoder.h	7.99 KB	-rw-r--r--
drm_encoder_slave.h	6.46 KB	-rw-r--r--
drm_fb_cma_helper.h	1.38 KB	-rw-r--r--
drm_fb_helper.h	14.95 KB	-rw-r--r--
drm_file.h	10.59 KB	-rw-r--r--
drm_fixed.h	4.71 KB	-rw-r--r--
drm_flip_work.h	3.01 KB	-rw-r--r--
drm_fourcc.h	2.85 KB	-rw-r--r--
drm_framebuffer.h	9.86 KB	-rw-r--r--
drm_gem.h	9.83 KB	-rw-r--r--
drm_gem_cma_helper.h	3.41 KB	-rw-r--r--
drm_gem_framebuffer_helper.h	1.17 KB	-rw-r--r--
drm_global.h	1.94 KB	-rw-r--r--
drm_hashtab.h	3.01 KB	-rw-r--r--
drm_ioctl.h	6.26 KB	-rw-r--r--
drm_irq.h	1.29 KB	-rw-r--r--
drm_lease.h	1.43 KB	-rw-r--r--
drm_legacy.h	6.77 KB	-rw-r--r--
drm_mipi_dsi.h	10.08 KB	-rw-r--r--
drm_mm.h	16.48 KB	-rw-r--r--
drm_mode_config.h	25.93 KB	-rw-r--r--
drm_mode_object.h	5.77 KB	-rw-r--r--
drm_modes.h	17.8 KB	-rw-r--r--
drm_modeset_helper.h	1.57 KB	-rw-r--r--
drm_modeset_helper_vtables.h	48.62 KB	-rw-r--r--
drm_modeset_lock.h	4.02 KB	-rw-r--r--
drm_of.h	3.17 KB	-rw-r--r--
drm_os_linux.h	2.04 KB	-rw-r--r--
drm_panel.h	7.03 KB	-rw-r--r--
drm_pci.h	2.45 KB	-rw-r--r--
drm_pciids.h	66.48 KB	-rw-r--r--
drm_plane.h	20.38 KB	-rw-r--r--
drm_plane_helper.h	3.2 KB	-rw-r--r--
drm_prime.h	3.06 KB	-rw-r--r--
drm_print.h	3.58 KB	-rw-r--r--
drm_property.h	12.03 KB	-rw-r--r--
drm_rect.h	5.87 KB	-rw-r--r--
drm_scdc_helper.h	4.34 KB	-rw-r--r--
drm_simple_kms_helper.h	3.99 KB	-rw-r--r--
drm_syncobj.h	4.13 KB	-rw-r--r--
drm_sysfs.h	287 B	-rw-r--r--
drm_vblank.h	7.23 KB	-rw-r--r--
drm_vma_manager.h	7.65 KB	-rw-r--r--
gma_drm.h	1.01 KB	-rw-r--r--
i915_component.h	4.11 KB	-rw-r--r--
i915_drm.h	3.47 KB	-rw-r--r--
i915_pciids.h	15.55 KB	-rw-r--r--
intel-gtt.h	987 B	-rw-r--r--
intel_lpe_audio.h	1.72 KB	-rw-r--r--

Code Editor : drm_framebuffer.h

/*
 * Copyright (c) 2016 Intel Corporation
 *
 * 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.
 */

#ifndef __DRM_FRAMEBUFFER_H__
#define __DRM_FRAMEBUFFER_H__

#include <linux/list.h>
#include <linux/ctype.h>
#include <drm/drm_mode_object.h>

struct drm_framebuffer;
struct drm_file;
struct drm_device;

/**
 * struct drm_framebuffer_funcs - framebuffer hooks
 */
struct drm_framebuffer_funcs {
	/**
	 * @destroy:
	 *
	 * Clean up framebuffer resources, specifically also unreference the
	 * backing storage. The core guarantees to call this function for every
	 * framebuffer successfully created by calling
	 * &drm_mode_config_funcs.fb_create. Drivers must also call
	 * drm_framebuffer_cleanup() to release DRM core resources for this
	 * framebuffer.
	 */
	void (*destroy)(struct drm_framebuffer *framebuffer);

/**
	 * @create_handle:
	 *
	 * Create a buffer handle in the driver-specific buffer manager (either
	 * GEM or TTM) valid for the passed-in &struct drm_file. This is used by
	 * the core to implement the GETFB IOCTL, which returns (for
	 * sufficiently priviledged user) also a native buffer handle. This can
	 * be used for seamless transitions between modesetting clients by
	 * copying the current screen contents to a private buffer and blending
	 * between that and the new contents.
	 *
	 * GEM based drivers should call drm_gem_handle_create() to create the
	 * handle.
	 *
	 * RETURNS:
	 *
	 * 0 on success or a negative error code on failure.
	 */
	int (*create_handle)(struct drm_framebuffer *fb,
			     struct drm_file *file_priv,
			     unsigned int *handle);
	/**
	 * @dirty:
	 *
	 * Optional callback for the dirty fb IOCTL.
	 *
	 * Userspace can notify the driver via this callback that an area of the
	 * framebuffer has changed and should be flushed to the display
	 * hardware. This can also be used internally, e.g. by the fbdev
	 * emulation, though that's not the case currently.
	 *
	 * See documentation in drm_mode.h for the struct drm_mode_fb_dirty_cmd
	 * for more information as all the semantics and arguments have a one to
	 * one mapping on this function.
	 *
	 * RETURNS:
	 *
	 * 0 on success or a negative error code on failure.
	 */
	int (*dirty)(struct drm_framebuffer *framebuffer,
		     struct drm_file *file_priv, unsigned flags,
		     unsigned color, struct drm_clip_rect *clips,
		     unsigned num_clips);
};

/**
 * struct drm_framebuffer - frame buffer object
 *
 * Note that the fb is refcounted for the benefit of driver internals,
 * for example some hw, disabling a CRTC/plane is asynchronous, and
 * scanout does not actually complete until the next vblank.  So some
 * cleanup (like releasing the reference(s) on the backing GEM bo(s))
 * should be deferred.  In cases like this, the driver would like to
 * hold a ref to the fb even though it has already been removed from
 * userspace perspective. See drm_framebuffer_get() and
 * drm_framebuffer_put().
 *
 * The refcount is stored inside the mode object @base.
 */
struct drm_framebuffer {
	/**
	 * @dev: DRM device this framebuffer belongs to
	 */
	struct drm_device *dev;
	/**
	 * @head: Place on the &drm_mode_config.fb_list, access protected by
	 * &drm_mode_config.fb_lock.
	 */
	struct list_head head;

/**
	 * @base: base modeset object structure, contains the reference count.
	 */
	struct drm_mode_object base;
	/**
	 * @format: framebuffer format information
	 */
	const struct drm_format_info *format;
	/**
	 * @funcs: framebuffer vfunc table
	 */
	const struct drm_framebuffer_funcs *funcs;
	/**
	 * @pitches: Line stride per buffer. For userspace created object this
	 * is copied from drm_mode_fb_cmd2.
	 */
	unsigned int pitches[4];
	/**
	 * @offsets: Offset from buffer start to the actual pixel data in bytes,
	 * per buffer. For userspace created object this is copied from
	 * drm_mode_fb_cmd2.
	 *
	 * Note that this is a linear offset and does not take into account
	 * tiling or buffer laytou per @modifier. It meant to be used when the
	 * actual pixel data for this framebuffer plane starts at an offset,
	 * e.g.  when multiple planes are allocated within the same backing
	 * storage buffer object. For tiled layouts this generally means it
	 * @offsets must at least be tile-size aligned, but hardware often has
	 * stricter requirements.
	 *
	 * This should not be used to specifiy x/y pixel offsets into the buffer
	 * data (even for linear buffers). Specifying an x/y pixel offset is
	 * instead done through the source rectangle in &struct drm_plane_state.
	 */
	unsigned int offsets[4];
	/**
	 * @modifier: Data layout modifier. This is used to describe
	 * tiling, or also special layouts (like compression) of auxiliary
	 * buffers. For userspace created object this is copied from
	 * drm_mode_fb_cmd2.
	 */
	uint64_t modifier;
	/**
	 * @width: Logical width of the visible area of the framebuffer, in
	 * pixels.
	 */
	unsigned int width;
	/**
	 * @height: Logical height of the visible area of the framebuffer, in
	 * pixels.
	 */
	unsigned int height;
	/**
	 * @flags: Framebuffer flags like DRM_MODE_FB_INTERLACED or
	 * DRM_MODE_FB_MODIFIERS.
	 */
	int flags;
	/**
	 * @hot_x: X coordinate of the cursor hotspot. Used by the legacy cursor
	 * IOCTL when the driver supports cursor through a DRM_PLANE_TYPE_CURSOR
	 * universal plane.
	 */
	int hot_x;
	/**
	 * @hot_y: Y coordinate of the cursor hotspot. Used by the legacy cursor
	 * IOCTL when the driver supports cursor through a DRM_PLANE_TYPE_CURSOR
	 * universal plane.
	 */
	int hot_y;
	/**
	 * @filp_head: Placed on &drm_file.fbs, protected by &drm_file.fbs_lock.
	 */
	struct list_head filp_head;
	/**
	 * @obj: GEM objects backing the framebuffer, one per plane (optional).
	 *
	 * This is used by the GEM framebuffer helpers, see e.g.
	 * drm_gem_fb_create().
	 */
	struct drm_gem_object *obj[4];
};

#define obj_to_fb(x) container_of(x, struct drm_framebuffer, base)

int drm_framebuffer_init(struct drm_device *dev,
			 struct drm_framebuffer *fb,
			 const struct drm_framebuffer_funcs *funcs);
struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
					       struct drm_file *file_priv,
					       uint32_t id);
void drm_framebuffer_remove(struct drm_framebuffer *fb);
void drm_framebuffer_cleanup(struct drm_framebuffer *fb);
void drm_framebuffer_unregister_private(struct drm_framebuffer *fb);

/**
 * drm_framebuffer_get - acquire a framebuffer reference
 * @fb: DRM framebuffer
 *
 * This function increments the framebuffer's reference count.
 */
static inline void drm_framebuffer_get(struct drm_framebuffer *fb)
{
	drm_mode_object_get(&fb->base);
}

/**
 * drm_framebuffer_put - release a framebuffer reference
 * @fb: DRM framebuffer
 *
 * This function decrements the framebuffer's reference count and frees the
 * framebuffer if the reference count drops to zero.
 */
static inline void drm_framebuffer_put(struct drm_framebuffer *fb)
{
	drm_mode_object_put(&fb->base);
}

/**
 * drm_framebuffer_reference - acquire a framebuffer reference
 * @fb: DRM framebuffer
 *
 * This is a compatibility alias for drm_framebuffer_get() and should not be
 * used by new code.
 */
static inline void drm_framebuffer_reference(struct drm_framebuffer *fb)
{
	drm_framebuffer_get(fb);
}

/**
 * drm_framebuffer_unreference - release a framebuffer reference
 * @fb: DRM framebuffer
 *
 * This is a compatibility alias for drm_framebuffer_put() and should not be
 * used by new code.
 */
static inline void drm_framebuffer_unreference(struct drm_framebuffer *fb)
{
	drm_framebuffer_put(fb);
}

/**
 * drm_framebuffer_read_refcount - read the framebuffer reference count.
 * @fb: framebuffer
 *
 * This functions returns the framebuffer's reference count.
 */
static inline uint32_t drm_framebuffer_read_refcount(struct drm_framebuffer *fb)
{
	return kref_read(&fb->base.refcount);
}

/**
 * drm_framebuffer_assign - store a reference to the fb
 * @p: location to store framebuffer
 * @fb: new framebuffer (maybe NULL)
 *
 * This functions sets the location to store a reference to the framebuffer,
 * unreferencing the framebuffer that was previously stored in that location.
 */
static inline void drm_framebuffer_assign(struct drm_framebuffer **p,
					  struct drm_framebuffer *fb)
{
	if (fb)
		drm_framebuffer_get(fb);
	if (*p)
		drm_framebuffer_put(*p);
	*p = fb;
}

/*
 * drm_for_each_fb - iterate over all framebuffers
 * @fb: the loop cursor
 * @dev: the DRM device
 *
 * Iterate over all framebuffers of @dev. User must hold
 * &drm_mode_config.fb_lock.
 */
#define drm_for_each_fb(fb, dev) \
	for (WARN_ON(!mutex_is_locked(&(dev)->mode_config.fb_lock)),		\
	     fb = list_first_entry(&(dev)->mode_config.fb_list,	\
					  struct drm_framebuffer, head);	\
	     &fb->head != (&(dev)->mode_config.fb_list);			\
	     fb = list_next_entry(fb, head))

int drm_framebuffer_plane_width(int width,
				const struct drm_framebuffer *fb, int plane);
int drm_framebuffer_plane_height(int height,
				 const struct drm_framebuffer *fb, int plane);

#endif

${this.title}

Code Editor : drm_framebuffer.h