1
2
3#include <linux/dma-buf-map.h>
4
5#include <drm/drm_atomic.h>
6#include <drm/drm_atomic_helper.h>
7#include <drm/drm_fourcc.h>
8#include <drm/drm_gem_atomic_helper.h>
9#include <drm/drm_gem_framebuffer_helper.h>
10#include <drm/drm_plane_helper.h>
11
12#include "vkms_drv.h"
13
14static const u32 vkms_formats[] = {
15 DRM_FORMAT_XRGB8888,
16};
17
18static const u32 vkms_plane_formats[] = {
19 DRM_FORMAT_ARGB8888,
20 DRM_FORMAT_XRGB8888
21};
22
23static struct drm_plane_state *
24vkms_plane_duplicate_state(struct drm_plane *plane)
25{
26 struct vkms_plane_state *vkms_state;
27 struct vkms_composer *composer;
28
29 vkms_state = kzalloc(sizeof(*vkms_state), GFP_KERNEL);
30 if (!vkms_state)
31 return NULL;
32
33 composer = kzalloc(sizeof(*composer), GFP_KERNEL);
34 if (!composer) {
35 DRM_DEBUG_KMS("Couldn't allocate composer\n");
36 kfree(vkms_state);
37 return NULL;
38 }
39
40 vkms_state->composer = composer;
41
42 __drm_gem_duplicate_shadow_plane_state(plane, &vkms_state->base);
43
44 return &vkms_state->base.base;
45}
46
47static void vkms_plane_destroy_state(struct drm_plane *plane,
48 struct drm_plane_state *old_state)
49{
50 struct vkms_plane_state *vkms_state = to_vkms_plane_state(old_state);
51 struct drm_crtc *crtc = vkms_state->base.base.crtc;
52
53 if (crtc) {
54
55
56
57 if (drm_framebuffer_read_refcount(&vkms_state->composer->fb))
58 drm_framebuffer_put(&vkms_state->composer->fb);
59 }
60
61 kfree(vkms_state->composer);
62 vkms_state->composer = NULL;
63
64 __drm_gem_destroy_shadow_plane_state(&vkms_state->base);
65 kfree(vkms_state);
66}
67
68static void vkms_plane_reset(struct drm_plane *plane)
69{
70 struct vkms_plane_state *vkms_state;
71
72 if (plane->state) {
73 vkms_plane_destroy_state(plane, plane->state);
74 plane->state = NULL;
75 }
76
77 vkms_state = kzalloc(sizeof(*vkms_state), GFP_KERNEL);
78 if (!vkms_state) {
79 DRM_ERROR("Cannot allocate vkms_plane_state\n");
80 return;
81 }
82
83 __drm_gem_reset_shadow_plane(plane, &vkms_state->base);
84}
85
86static const struct drm_plane_funcs vkms_plane_funcs = {
87 .update_plane = drm_atomic_helper_update_plane,
88 .disable_plane = drm_atomic_helper_disable_plane,
89 .reset = vkms_plane_reset,
90 .atomic_duplicate_state = vkms_plane_duplicate_state,
91 .atomic_destroy_state = vkms_plane_destroy_state,
92};
93
94static void vkms_plane_atomic_update(struct drm_plane *plane,
95 struct drm_atomic_state *state)
96{
97 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
98 plane);
99 struct vkms_plane_state *vkms_plane_state;
100 struct drm_shadow_plane_state *shadow_plane_state;
101 struct drm_framebuffer *fb = new_state->fb;
102 struct vkms_composer *composer;
103
104 if (!new_state->crtc || !fb)
105 return;
106
107 vkms_plane_state = to_vkms_plane_state(new_state);
108 shadow_plane_state = &vkms_plane_state->base;
109
110 composer = vkms_plane_state->composer;
111 memcpy(&composer->src, &new_state->src, sizeof(struct drm_rect));
112 memcpy(&composer->dst, &new_state->dst, sizeof(struct drm_rect));
113 memcpy(&composer->fb, fb, sizeof(struct drm_framebuffer));
114 memcpy(&composer->map, &shadow_plane_state->data, sizeof(composer->map));
115 drm_framebuffer_get(&composer->fb);
116 composer->offset = fb->offsets[0];
117 composer->pitch = fb->pitches[0];
118 composer->cpp = fb->format->cpp[0];
119}
120
121static int vkms_plane_atomic_check(struct drm_plane *plane,
122 struct drm_atomic_state *state)
123{
124 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
125 plane);
126 struct drm_crtc_state *crtc_state;
127 bool can_position = false;
128 int ret;
129
130 if (!new_plane_state->fb || WARN_ON(!new_plane_state->crtc))
131 return 0;
132
133 crtc_state = drm_atomic_get_crtc_state(state,
134 new_plane_state->crtc);
135 if (IS_ERR(crtc_state))
136 return PTR_ERR(crtc_state);
137
138 if (plane->type != DRM_PLANE_TYPE_PRIMARY)
139 can_position = true;
140
141 ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
142 DRM_PLANE_HELPER_NO_SCALING,
143 DRM_PLANE_HELPER_NO_SCALING,
144 can_position, true);
145 if (ret != 0)
146 return ret;
147
148
149 if (!new_plane_state->visible && !can_position)
150 return -EINVAL;
151
152 return 0;
153}
154
155static const struct drm_plane_helper_funcs vkms_primary_helper_funcs = {
156 .atomic_update = vkms_plane_atomic_update,
157 .atomic_check = vkms_plane_atomic_check,
158 DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
159};
160
161struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
162 enum drm_plane_type type, int index)
163{
164 struct drm_device *dev = &vkmsdev->drm;
165 const struct drm_plane_helper_funcs *funcs;
166 struct vkms_plane *plane;
167 const u32 *formats;
168 int nformats;
169
170 switch (type) {
171 case DRM_PLANE_TYPE_PRIMARY:
172 formats = vkms_formats;
173 nformats = ARRAY_SIZE(vkms_formats);
174 funcs = &vkms_primary_helper_funcs;
175 break;
176 case DRM_PLANE_TYPE_CURSOR:
177 case DRM_PLANE_TYPE_OVERLAY:
178 formats = vkms_plane_formats;
179 nformats = ARRAY_SIZE(vkms_plane_formats);
180 funcs = &vkms_primary_helper_funcs;
181 break;
182 default:
183 formats = vkms_formats;
184 nformats = ARRAY_SIZE(vkms_formats);
185 funcs = &vkms_primary_helper_funcs;
186 break;
187 }
188
189 plane = drmm_universal_plane_alloc(dev, struct vkms_plane, base, 1 << index,
190 &vkms_plane_funcs,
191 formats, nformats,
192 NULL, type, NULL);
193 if (IS_ERR(plane))
194 return plane;
195
196 drm_plane_helper_add(&plane->base, funcs);
197
198 return plane;
199}
200
