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/*
* 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>
#include <drm/drm_color_mgmt.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)
* @alpha: opacity of the plane
* @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 set drm_mode_config.normalize_zpos or 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. The core atomic
* code will set this when userspace is using explicit fencing. Do not
* write this directly for a driver's implicit fence, use
* drm_atomic_set_fence_for_plane() to ensure that an explicit fence is
* preserved.
*
* Drivers should store any implicit fence in this from their
* &drm_plane_helper.prepare_fb callback. See drm_gem_fb_prepare_fb()
* and drm_gem_fb_simple_display_pipe_prepare_fb() for suitable helpers.
*/
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 opacity */
u16 alpha;
/* Plane rotation */
unsigned int rotation;
/* Plane zpos */
unsigned int zpos;
unsigned int normalized_zpos;
/**
* @color_encoding:
*
* Color encoding for non RGB formats
*/
enum drm_color_encoding color_encoding;
/**
* @color_range:
*
* Color range for non RGB formats
*/
enum drm_color_range color_range;
/* 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:
*
|