drm: rcar-du: Fix race condition in hardware plane allocator
[deliverable/linux.git] / drivers / gpu / drm / rcar-du / rcar_du_plane.h
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1/*
2 * rcar_du_plane.h -- R-Car Display Unit Planes
3 *
36d50464 4 * Copyright (C) 2013-2014 Renesas Electronics Corporation
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5 *
6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14#ifndef __RCAR_DU_PLANE_H__
15#define __RCAR_DU_PLANE_H__
16
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17#include <drm/drmP.h>
18#include <drm/drm_crtc.h>
19
4bf8e196 20struct rcar_du_format_info;
cb2025d2 21struct rcar_du_group;
4bf8e196 22
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23/* The RCAR DU has 8 hardware planes, shared between primary and overlay planes.
24 * As using overlay planes requires at least one of the CRTCs being enabled, no
25 * more than 7 overlay planes can be available. We thus create 1 primary plane
26 * per CRTC and 7 overlay planes, for a total of up to 9 KMS planes.
4bf8e196 27 */
917de180 28#define RCAR_DU_NUM_KMS_PLANES 9
4bf8e196 29#define RCAR_DU_NUM_HW_PLANES 8
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30
31struct rcar_du_plane {
917de180 32 struct drm_plane plane;
cb2025d2 33 struct rcar_du_group *group;
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34};
35
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36static inline struct rcar_du_plane *to_rcar_plane(struct drm_plane *plane)
37{
38 return container_of(plane, struct rcar_du_plane, plane);
39}
40
ae425b6a 41struct rcar_du_planes {
917de180 42 struct rcar_du_plane planes[RCAR_DU_NUM_KMS_PLANES];
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43
44 struct drm_property *alpha;
45 struct drm_property *colorkey;
46 struct drm_property *zpos;
47};
48
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49struct rcar_du_plane_state {
50 struct drm_plane_state state;
51
5bfcbce0 52 const struct rcar_du_format_info *format;
5ee5a81d 53 int hwindex; /* 0-based, -1 means unused */
5bfcbce0 54
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55 unsigned int alpha;
56 unsigned int colorkey;
57 unsigned int zpos;
58};
59
60static inline struct rcar_du_plane_state *
61to_rcar_du_plane_state(struct drm_plane_state *state)
62{
63 return container_of(state, struct rcar_du_plane_state, state);
64}
65
cb2025d2 66int rcar_du_planes_init(struct rcar_du_group *rgrp);
7fe99fda 67
4bf8e196 68void rcar_du_plane_setup(struct rcar_du_plane *plane);
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69
70#endif /* __RCAR_DU_PLANE_H__ */
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