/*
* 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_PLANE_H__
#define __DRM_PLANE_H__
#include <linux/list.h>
#include <linux/ctype.h>
#include <drm/drm_mode_object.h>
struct drm_crtc;
struct drm_printer;
struct drm_modeset_acquire_ctx;
/**
* struct drm_plane_state - mutable plane state
* @plane: backpointer to the plane
* @crtc_w: width of visible portion of plane on crtc
* @crtc_h: height of visible portion of plane on crtc
* @src_x: left position of visible portion of plane within
* plane (in 16.16)
* @src_y: upper position of visible portion of plane within
* plane (in 16.16)
* @src_w: width of visible portion of plane (in 16.16)
* @src_h: height of visible portion of plane (in 16.16)
* @rotation: rotation of the plane
* @zpos: priority of the given plane on crtc (optional)
* Note that multiple active planes on the same crtc can have an identical
* zpos value. The rule to solving the conflict is to compare the plane
* object IDs; the plane with a higher ID must be stacked on top of a
* plane with a lower ID.
* @normalized_zpos: normalized value of zpos: unique, range from 0 to N-1
* where N is the number of active planes for given crtc. Note that
* the driver must call drm_atomic_normalize_zpos() to update this before
* it can be trusted.
* @src: clipped source coordinates of the plane (in 16.16)
* @dst: clipped destination coordinates of the plane
* @state: backpointer to global drm_atomic_state
*/
struct drm_plane_state {
struct drm_plane *plane;
/**
* @crtc:
*
* Currently bound CRTC, NULL if disabled. Do not this write directly,
* use drm_atomic_set_crtc_for_plane()
*/
struct drm_crtc *crtc;
/**
* @fb:
*
* Currently bound framebuffer. Do not write this directly, use
* drm_atomic_set_fb_for_plane()
*/
struct drm_framebuffer *fb;
/**
* @fence:
*
* Optional fence to wait for before scanning out @fb. Do not write this
* directly, use drm_atomic_set_fence_for_plane()
*/
struct dma_fence *fence;
/**
* @crtc_x:
*
* Left position of visible portion of plane on crtc, signed dest
* location allows it to be partially off screen.
*/
int32_t crtc_x;
/**
* @crtc_y:
*
* Upper position of visible portion of plane on crtc, signed dest
* location allows it to be partially off screen.
*/
int32_t crtc_y;
uint32_t crtc_w, crtc_h;
/* Source values are 16.16 fixed point */
uint32_t src_x, src_y;
uint32_t src_h, src_w;
/* Plane rotation */
unsigned int rotation;
/* Plane zpos */
unsigned int zpos;
unsigned int normalized_zpos;
/* Clipped coordinates */
struct drm_rect src, dst;
/**
* @visible:
*
* Visibility of the plane. This can be false even if fb!=NULL and
* crtc!=NULL, due to clipping.
*/
bool visible;
/**
* @commit: Tracks the pending commit to prevent use-after-free conditions,
* and for async plane updates.
*
* May be NULL.
*/
struct drm_crtc_commit *commit;
struct drm_atomic_state *state;
};
static inline struct drm_rect
drm_plane_state_src(const struct drm_plane_state *state)
{
struct drm_rect src = {
.x1 = state->src_x,
.y1 = state->src_y,
.x2 = state->src_x + state->src_w,
.y2 = state->src_y + state->src_h,
};
return src;
}
static inline struct drm_rect
drm_plane_state_dest(const struct drm_plane_state *state)
{
struct drm_rect dest = {
.x1 = state->crtc_x,
.y1 = state->crtc_y,
.x2 = state->crtc_x + state->crtc_w,
.y2 = state->crtc_y + state->crtc_h,
};
return dest;
}
/**
* struct drm_plane_funcs - driver plane control functions
*/
struct drm_plane_funcs {
/**
* @update_plane:
*
* This is the legacy entry point to enable and configure the plane for
* the given CRTC and framebuffer. It is never called to disable the
* plane, i.e. the passed-in crtc and fb paramters are never NULL.
*
* The source rectangle in frame buffer memory coordinates is given by
* the src_x, src_y, src_w and src_h parameters (as 16.16 fixed point
* values). Devices that don't support subpixel plane coordinates can
* ignore the fractional part.
*
* The destination rectangle in CRTC coordinates is given by the
* crtc_x, crtc_y, crtc_w and crtc_h parameters (as integer values).
* Devices scale the source rectangle to the destination rectangle. If
* scaling is not supported, and the source rectangle size doesn't match
* the destination rectangle size, the driver must return a
* -<errorname>EINVAL</errorname> error.
*
* Drivers implementing atomic modeset should use
* drm_atomic_helper_update_plane() to implement this hook.
*
* RETURNS:
*
* 0 on success or a negative error code on failure.
*/
int (*update_plane)(struct drm_plane *plane,
struct drm_crtc *crtc, struct drm_framebuffer *fb,
int crtc_x, int crtc_y,
unsigned int crtc_w, unsigned int crtc_h,
uint32_t src_x, uint32_t src_y,
uint32_t src_w, uint32_t src_h,
struct drm_modeset_acquire_ctx *ctx);
/**
* @disable_plane:
*
* This is the legacy entry point to disable the plane. The DRM core
* calls this method in response to a DRM_IOCTL_MODE_SETPLANE IOCTL call
* with the frame buffer ID set to 0. Disabled planes must not be
* processed by the CRTC.
*
* Drivers implementing atomic modeset should use
* drm_atomic_helper_disable_plane() to implement this hook.
*
* RETURNS:
*
* 0 on success or a negative error code on failure.
*/
int (*disable_plane)(struct drm_plane *plane,
struct drm_modeset_acquire_ctx *ctx);
/**
* @destroy:
*
* Clean up plane resources. This is only called at driver unload time
* through drm_mode_config_cleanup() since a plane cannot be hotplugged
* in DRM.
*/
void (*destroy)(struct drm_plane *plane);
/**
* @reset:
*
* Reset plane hardware and software state to off. This function isn't
* called by the core directly, only through drm_mode_config_reset().
* It's not a helper hook only for historical reasons.
*
* Atomic drivers can use drm_atomic_helper_plane_reset() to reset
* atomic state using this hook.
*/
void (*reset)(struct drm_plane *plane);
/**
* @set_property:
*
* This is the legacy entry point to update a property attached to the
* plane.
*
* This callback is optional if the driver does not support any legacy
* driver-private properties. For atomic drivers it is not used because
* property handling is done entirely in the DRM core.
*
* RETURNS:
*
* 0 on success or a negative error code on failure.
*/
int (*set_property)(struct drm_plane *plane,
struct drm_property *property, uint64_t val);
/**
* @atomic_duplicate_state:
*
* Duplicate the current atomic state for this plane and return it.
* The core and helpers guarantee that any atomic state duplicated with
* this hook and still owned by the caller (i.e. not transferred to the
* driver by calling &drm_mode_config_funcs.atomic_commit) will be
* cleaned up by calling the @atomic_destroy_state hook in this
* structure.
*
* Atomic drivers which don't subclass &struct drm_plane_state should use
* drm_atomic_helper_plane_duplicate_state(). Drivers that subclass the
* state structure to extend it with driver-private state should use
* __drm_atomic_helper_plane_duplicate_state() to make sure shared state is
* duplicated in a consistent fashion across drivers.
*
* It is an error to call this hook before &drm_plane.state has been
* initialized correctly.
*
* NOTE:
*
* If the duplicate state references refcounted resources this hook must
* acquire a reference for each of them. The driver must release these
* references again in @atomic_destroy_state.
*
* RETURNS:
*
* Duplicated atomic state or NULL when the allocation failed.
*/
struct drm_plane_state *(*atomic_duplicate_state)(struct drm_plane *plane);
/**
* @atomic_destroy_state:
*
* Destroy a state duplicated with @atomic_duplicate_state and release
* or unreference all resources it references
*/
void (*atomic_destroy_state)(struct drm_plane *plane,
struct drm_plane_state *state);
/**
* @atomic_set_property:
*
* Decode a driver-private property value and store the decoded value
* into the passed-in state structure. Since the atomic core decodes all
* standardized properties (even for extensions beyond the core set of
* properties which might not be implemented by all drivers) this
* requires drivers to subclass the state structure.
*
* Such driver-private properties should really only be implemented for
* truly hardware/vendor specific state. Instead it is preferred to
* standardize atomic extension and decode the properties used to expose
* such an extension in the core.
*
* Do not call this function directly, use
* drm_atomic_plane_set_property() instead.
*
* This callback is optional if the driver does not support any
* driver-private atomic properties.
*
* NOTE:
*
* This function is called in the state assembly phase of atomic
* modesets, which can be aborted for any reason (including on
* userspace's request to just check whether a configuration would be
* possible). Drivers MUST NOT touch any persistent state (hardware or
* software) or data structures except the passed in @state parameter.
*
* Also since userspace controls in which order properties are set this
* function must not do any input validation (since the state update is
* incomplete and hence likely inconsistent). Instead any such input
* validation must be done in the various atomic_check callbacks.
*
* RETURNS:
*
* 0 if the property has been found, -EINVAL if the property isn't
* implemented by the driver (which shouldn't ever happen, the core only
* asks for properties attached to this plane). No other validation is
* allowed by the driver. The core already checks that the property
* value is within the range (integer, valid enum value, ...) the driver
* set when registering the property.
*/
int (*atomic_set_property)(struct drm_plane *plane,
struct drm_plane_state *state,
struct drm_property *property,
uint64_t val);
/**
* @atomic_get_property:
*
* Reads out the decoded driver-private property. This is used to
* implement the GETPLANE IOCTL.
*
* Do not call this function directly, use
* drm_atomic_plane_get_property() instead.
*
* This callback is optional if the driver does not support any
* driver-private atomic properties.
*
* RETURNS:
*
* 0 on success, -EINVAL if the property isn't implemented by the
* driver (which should never happen, the core only asks for
* properties attached to this plane).
*/
int (*atomic_get_property)(struct drm_plane *plane,
const struct drm_plane_state *state,
struct drm_property *property,
uint64_t *val);
/**
* @late_register:
*
* This optional hook can be used to register additional userspace
* interfaces attached to the plane like debugfs interfaces.
* It is called late in the driver load sequence from drm_dev_register().
* Everything added from this callback should be unregistered in
* the early_unregister callback.
*
* Returns:
*
* 0 on success, or a negative error code on failure.
*/
int (*late_register)(struct drm_plane *plane);
/**
* @early_unregister:
*
* This optional hook should be used to unregister the additional
* userspace interfaces attached to the plane from
* @late_register. It is called from drm_dev_unregister(),
* early in the driver unload sequence to disable userspace access
* before data structures are torndown.
*/
void (*early_unregister)(struct drm_plane *plane);
/**
* @atomic_print_state:
*
* If driver subclasses &struct drm_plane_state, it should implement
* this optional hook for printing additional driver specific state.
*
* Do not call this directly, use drm_atomic_plane_print_state()
* instead.
*/
void (*atomic_print_state)(struct drm_printer *p,
const struct drm_plane_state *state);
/**
* @format_mod_supported:
*
* This optional hook is used for the DRM to determine if the given
* format/modifier combination is valid for the plane. This allows the
* DRM to generate the correct format bitmask (which formats apply to
* which modifier).
*
* Returns:
*
* True if the given modifier is valid for that format on the plane.
* False otherwise.
*/
bool (*format_mod_supported)(struct drm_plane *plane, uint32_t format,
uint64_t modifier);
};
/**
* enum drm_plane_type - uapi plane type enumeration
*
* For historical reasons not all planes are made the same. This enumeration is
* used to tell the different types of planes apart to implement the different
* uapi semantics for them. For userspace which is universal plane aware and
* which is using that atomic IOCTL there's no difference between these planes
* (beyong what the driver and hardware can support of course).
*
* For compatibility with legacy userspace, only overlay planes are made
* available to userspace by default. Userspace clients may set the
* DRM_CLIENT_CAP_UNIVERSAL_PLANES client capability bit to indicate that they
* wish to receive a universal plane list containing all plane types. See also
* drm_for_each_legacy_plane().
*
* WARNING: The values of this enum is UABI since they're exposed in the "type"
* property.
*/
enum drm_plane_type {
/**
* @DRM_PLANE_TYPE_OVERLAY:
*
* Overlay planes represent all non-primary, non-cursor planes. Some
* drivers refer to these types of planes as "sprites" internally.
*/
DRM_PLANE_TYPE_OVERLAY,
/**
* @DRM_PLANE_TYPE_PRIMARY:
*
* Primary planes represent a "main" plane for a CRTC. Primary planes
* are the planes operated upon by CRTC modesetting and flipping
* operations described in the &drm_crtc_funcs.page_flip and
* &drm_crtc_funcs.set_config hooks.
*/
DRM_PLANE_TYPE_PRIMARY,
/**
* @DRM_PLANE_TYPE_CURSOR:
*
* Cursor planes represent a "cursor" plane for a CRTC. Cursor planes
* are the planes operated upon by the DRM_IOCTL_MODE_CURSOR and
* DRM_IOCTL_MODE_CURSOR2 IOCTLs.
*/
DRM_PLANE_TYPE_CURSOR,
};
/**
* struct drm_plane - central DRM plane control structure
* @dev: DRM device this plane belongs to
* @head: for list management
* @name: human readable name, can be overwritten by the driver
* @base: base mode object
* @possible_crtcs: pipes this plane can be bound to
* @format_types: array of formats supported by this plane
* @format_count: number of formats supported
* @format_default: driver hasn't supplied supported formats for the plane
* @modifiers: array of modifiers supported by this plane
* @modifier_count: number of modifiers supported
* @old_fb: Temporary tracking of the old fb while a modeset is ongoing. Used by
* drm_mode_set_config_internal() to implement correct refcounting.
* @funcs: helper functions
* @properties: property tracking for this plane
* @type: type of plane (overlay, primary, cursor)
* @zpos_property: zpos property for this plane
* @rotation_property: rotation property for this plane
* @helper_private: mid-layer private data
*/
struct drm_plane {
struct drm_device *dev;
struct list_head head;
char *name;
/**
* @mutex:
*
* Protects modeset plane state, together with the &drm_crtc.mutex of
* CRTC this plane is linked to (when active, getting activated or
* getting disabled).
*
* For atomic drivers specifically this protects @state.
*/
struct drm_modeset_lock mutex;
struct drm_mode_object base;
uint32_t possible_crtcs;
uint32_t *format_types;
unsigned int format_count;
bool format_default;
uint64_t *modifiers;
unsigned int modifier_count;
/**
* @crtc: Currently bound CRTC, only really meaningful for non-atomic
* drivers. Atomic drivers should instead check &drm_plane_state.crtc.
*/
struct drm_crtc *crtc;
/**
* @fb: Currently bound framebuffer, only really meaningful for
* non-atomic drivers. Atomic drivers should instead check
* &drm_plane_state.fb.
*/
struct drm_framebuffer *fb;
struct drm_framebuffer *old_fb;
const struct drm_plane_funcs *funcs;
struct drm_object_properties properties;
enum drm_plane_type type;
/**
* @index: Position inside the mode_config.list, can be used as an array
* index. It is invariant over the lifetime of the plane.
*/
unsigned index;
const struct drm_plane_helper_funcs *helper_private;
/**
* @state:
*
* Current atomic state for this plane.
*
* This is protected by @mutex. Note that nonblocking atomic commits
* access the current plane state without taking locks. Either by going
* through the &struct drm_atomic_state pointers, see
* for_each_oldnew_plane_in_state(), for_each_old_plane_in_state() and
* for_each_new_plane_in_state(). Or through careful ordering of atomic
* commit operations as implemented in the atomic helpers, see
* &struct drm_crtc_commit.
*/
struct drm_plane_state *state;
struct drm_property *zpos_property;
struct drm_property *rotation_property;
};
#define obj_to_plane(x) container_of(x, struct drm_plane, base)
__printf(9, 10)
int drm_universal_plane_init(struct drm_device *dev,
struct drm_plane *plane,
uint32_t possible_crtcs,
const struct drm_plane_funcs *funcs,
const uint32_t *formats,
unsigned int format_count,
const uint64_t *format_modifiers,
enum drm_plane_type type,
const char *name, ...);
int drm_plane_init(struct drm_device *dev,
struct drm_plane *plane,
uint32_t possible_crtcs,
const struct drm_plane_funcs *funcs,
const uint32_t *formats, unsigned int format_count,
bool is_primary);
void drm_plane_cleanup(struct drm_plane *plane);
/**
* drm_plane_index - find the index of a registered plane
* @plane: plane to find index for
*
* Given a registered plane, return the index of that plane within a DRM
* device's list of planes.
*/
static inline unsigned int drm_plane_index(struct drm_plane *plane)
{
return plane->index;
}
struct drm_plane * drm_plane_from_index(struct drm_device *dev, int idx);
void drm_plane_force_disable(struct drm_plane *plane);
int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
struct drm_property *property,
uint64_t value);
/**
* drm_plane_find - find a &drm_plane
* @dev: DRM device
* @file_priv: drm file to check for lease against.
* @id: plane id
*
* Returns the plane with @id, NULL if it doesn't exist. Simple wrapper around
* drm_mode_object_find().
*/
static inline struct drm_plane *drm_plane_find(struct drm_device *dev,
struct drm_file *file_priv,
uint32_t id)
{
struct drm_mode_object *mo;
mo = drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_PLANE);
return mo ? obj_to_plane(mo) : NULL;
}
/**
* drm_for_each_plane_mask - iterate over planes specified by bitmask
* @plane: the loop cursor
* @dev: the DRM device
* @plane_mask: bitmask of plane indices
*
* Iterate over all planes specified by bitmask.
*/
#define drm_for_each_plane_mask(plane, dev, plane_mask) \
list_for_each_entry((plane), &(dev)->mode_config.plane_list, head) \
for_each_if ((plane_mask) & (1 << drm_plane_index(plane)))
/**
* drm_for_each_legacy_plane - iterate over all planes for legacy userspace
* @plane: the loop cursor
* @dev: the DRM device
*
* Iterate over all legacy planes of @dev, excluding primary and cursor planes.
* This is useful for implementing userspace apis when userspace is not
* universal plane aware. See also &enum drm_plane_type.
*/
#define drm_for_each_legacy_plane(plane, dev) \
list_for_each_entry(plane, &(dev)->mode_config.plane_list, head) \
for_each_if (plane->type == DRM_PLANE_TYPE_OVERLAY)
/**
* drm_for_each_plane - iterate over all planes
* @plane: the loop cursor
* @dev: the DRM device
*
* Iterate over all planes of @dev, include primary and cursor planes.
*/
#define drm_for_each_plane(plane, dev) \
list_for_each_entry(plane, &(dev)->mode_config.plane_list, head)
#endif
