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drm_plane_helper.h
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/*
* Copyright (C) 2011-2013 Intel Corporation
*
* 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
* THE AUTHORS OR COPYRIGHT HOLDERS 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_PLANE_HELPER_H
#define DRM_PLANE_HELPER_H
#include <drm/drm_rect.h>
#include <drm/drm_crtc.h>
/*
* Drivers that don't allow primary plane scaling may pass this macro in place
* of the min/max scale parameters of the update checker function.
*
* Due to src being in 16.16 fixed point and dest being in integer pixels,
* 1<<16 represents no scaling.
*/
#define DRM_PLANE_HELPER_NO_SCALING (1<<16)
/**
* DOC: plane helpers
*
* Helper functions to assist with creation and handling of CRTC primary
* planes.
*/
int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
const struct drm_crtc_funcs *funcs);
/**
* drm_plane_helper_funcs - helper operations for CRTCs
* @prepare_fb: prepare a framebuffer for use by the plane
* @cleanup_fb: cleanup a framebuffer when it's no longer used by the plane
* @atomic_check: check that a given atomic state is valid and can be applied
* @atomic_update: apply an atomic state to the plane (mandatory)
* @atomic_disable: disable the plane
*
* The helper operations are called by the mid-layer CRTC helper.
*/
struct drm_plane_helper_funcs {
int (*prepare_fb)(struct drm_plane *plane,
const struct drm_plane_state *new_state);
void (*cleanup_fb)(struct drm_plane *plane,
const struct drm_plane_state *old_state);
int (*atomic_check)(struct drm_plane *plane,
struct drm_plane_state *state);
void (*atomic_update)(struct drm_plane *plane,
struct drm_plane_state *old_state);
void (*atomic_disable)(struct drm_plane *plane,
struct drm_plane_state *old_state);
};
static inline void drm_plane_helper_add(struct drm_plane *plane,
const struct drm_plane_helper_funcs *funcs)
{
plane->helper_private = funcs;
}
int drm_plane_helper_check_update(struct drm_plane *plane,
struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_rect *src,
struct drm_rect *dest,
const struct drm_rect *clip,
int min_scale,
int max_scale,
bool can_position,
bool can_update_disabled,
bool *visible);
int drm_primary_helper_update(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);
int drm_primary_helper_disable(struct drm_plane *plane);
void drm_primary_helper_destroy(struct drm_plane *plane);
extern const struct drm_plane_funcs drm_primary_helper_funcs;
int drm_plane_helper_update(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);
int drm_plane_helper_disable(struct drm_plane *plane);
/* For use by drm_crtc_helper.c */
int drm_plane_helper_commit(struct drm_plane *plane,
struct drm_plane_state *plane_state,
struct drm_framebuffer *old_fb);
#endif