1// SPDX-License-Identifier: MIT
2/*
3 * Copyright © 2023 Intel Corporation
4 */
5
6#include "intel_crtc.h"
7#include "intel_display_core.h"
8#include "intel_display_types.h"
9#include "intel_sprite_uapi.h"
10
11static bool has_dst_key_in_primary_plane(struct intel_display *display)
12{
13 return DISPLAY_VER(display) >= 9;
14}
15
16static void intel_plane_set_ckey(struct intel_plane_state *plane_state,
17 const struct drm_intel_sprite_colorkey *set)
18{
19 struct intel_display *display = to_intel_display(plane_state);
20 struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
21 struct drm_intel_sprite_colorkey *key = &plane_state->ckey;
22
23 *key = *set;
24
25 /*
26 * We want src key enabled on the
27 * sprite and not on the primary.
28 */
29 if (plane->id == PLANE_PRIMARY &&
30 set->flags & I915_SET_COLORKEY_SOURCE)
31 key->flags = 0;
32
33 /*
34 * On SKL+ we want dst key enabled on
35 * the primary and not on the sprite.
36 */
37 if (DISPLAY_VER(display) >= 9 && plane->id != PLANE_PRIMARY &&
38 set->flags & I915_SET_COLORKEY_DESTINATION)
39 key->flags = 0;
40}
41
42int intel_sprite_set_colorkey_ioctl(struct drm_device *dev, void *data,
43 struct drm_file *file_priv)
44{
45 struct intel_display *display = to_intel_display(dev);
46 struct drm_intel_sprite_colorkey *set = data;
47 struct drm_plane *plane;
48 struct drm_plane_state *plane_state;
49 struct drm_atomic_state *state;
50 struct drm_modeset_acquire_ctx ctx;
51 int ret = 0;
52
53 /* ignore the pointless "none" flag */
54 set->flags &= ~I915_SET_COLORKEY_NONE;
55
56 if (set->flags & ~(I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE))
57 return -EINVAL;
58
59 /* Make sure we don't try to enable both src & dest simultaneously */
60 if ((set->flags & (I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE)) == (I915_SET_COLORKEY_DESTINATION | I915_SET_COLORKEY_SOURCE))
61 return -EINVAL;
62
63 if ((display->platform.valleyview || display->platform.cherryview) &&
64 set->flags & I915_SET_COLORKEY_DESTINATION)
65 return -EINVAL;
66
67 plane = drm_plane_find(dev, file_priv, id: set->plane_id);
68 if (!plane || plane->type != DRM_PLANE_TYPE_OVERLAY)
69 return -ENOENT;
70
71 /*
72 * SKL+ only plane 2 can do destination keying against plane 1.
73 * Also multiple planes can't do destination keying on the same
74 * pipe simultaneously.
75 */
76 if (DISPLAY_VER(display) >= 9 &&
77 to_intel_plane(plane)->id >= PLANE_3 &&
78 set->flags & I915_SET_COLORKEY_DESTINATION)
79 return -EINVAL;
80
81 drm_modeset_acquire_init(ctx: &ctx, flags: 0);
82
83 state = drm_atomic_state_alloc(dev: plane->dev);
84 if (!state) {
85 ret = -ENOMEM;
86 goto out;
87 }
88 state->acquire_ctx = &ctx;
89 to_intel_atomic_state(state)->internal = true;
90
91 while (1) {
92 plane_state = drm_atomic_get_plane_state(state, plane);
93 ret = PTR_ERR_OR_ZERO(ptr: plane_state);
94 if (!ret)
95 intel_plane_set_ckey(to_intel_plane_state(plane_state), set);
96
97 /*
98 * On some platforms we have to configure
99 * the dst colorkey on the primary plane.
100 */
101 if (!ret && has_dst_key_in_primary_plane(display)) {
102 struct intel_crtc *crtc =
103 intel_crtc_for_pipe(display,
104 to_intel_plane(plane)->pipe);
105
106 plane_state = drm_atomic_get_plane_state(state,
107 plane: crtc->base.primary);
108 ret = PTR_ERR_OR_ZERO(ptr: plane_state);
109 if (!ret)
110 intel_plane_set_ckey(to_intel_plane_state(plane_state), set);
111 }
112
113 if (!ret)
114 ret = drm_atomic_commit(state);
115
116 if (ret != -EDEADLK)
117 break;
118
119 drm_atomic_state_clear(state);
120 drm_modeset_backoff(ctx: &ctx);
121 }
122
123 drm_atomic_state_put(state);
124out:
125 drm_modeset_drop_locks(ctx: &ctx);
126 drm_modeset_acquire_fini(ctx: &ctx);
127 return ret;
128}
129

source code of linux/drivers/gpu/drm/i915/display/intel_sprite_uapi.c