1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2015 MediaTek Inc.
4 * Author: CK Hu <ck.hu@mediatek.com>
5 */
6
7 #include <drm/drm_atomic.h>
8 #include <drm/drm_atomic_helper.h>
9 #include <drm/drm_fourcc.h>
10 #include <drm/drm_atomic_uapi.h>
11 #include <drm/drm_plane_helper.h>
12 #include <drm/drm_gem_framebuffer_helper.h>
13
14 #include "mtk_drm_crtc.h"
15 #include "mtk_drm_ddp_comp.h"
16 #include "mtk_drm_drv.h"
17 #include "mtk_drm_gem.h"
18 #include "mtk_drm_plane.h"
19
20 static const u32 formats[] = {
21 DRM_FORMAT_XRGB8888,
22 DRM_FORMAT_ARGB8888,
23 DRM_FORMAT_BGRX8888,
24 DRM_FORMAT_BGRA8888,
25 DRM_FORMAT_ABGR8888,
26 DRM_FORMAT_XBGR8888,
27 DRM_FORMAT_RGB888,
28 DRM_FORMAT_BGR888,
29 DRM_FORMAT_RGB565,
30 DRM_FORMAT_UYVY,
31 DRM_FORMAT_YUYV,
32 };
33
mtk_plane_reset(struct drm_plane * plane)34 static void mtk_plane_reset(struct drm_plane *plane)
35 {
36 struct mtk_plane_state *state;
37
38 if (plane->state) {
39 __drm_atomic_helper_plane_destroy_state(plane->state);
40
41 state = to_mtk_plane_state(plane->state);
42 memset(state, 0, sizeof(*state));
43 } else {
44 state = kzalloc(sizeof(*state), GFP_KERNEL);
45 if (!state)
46 return;
47 plane->state = &state->base;
48 }
49
50 state->base.plane = plane;
51 state->pending.format = DRM_FORMAT_RGB565;
52 }
53
mtk_plane_duplicate_state(struct drm_plane * plane)54 static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane)
55 {
56 struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state);
57 struct mtk_plane_state *state;
58
59 state = kzalloc(sizeof(*state), GFP_KERNEL);
60 if (!state)
61 return NULL;
62
63 __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
64
65 WARN_ON(state->base.plane != plane);
66
67 state->pending = old_state->pending;
68
69 return &state->base;
70 }
71
mtk_drm_plane_destroy_state(struct drm_plane * plane,struct drm_plane_state * state)72 static void mtk_drm_plane_destroy_state(struct drm_plane *plane,
73 struct drm_plane_state *state)
74 {
75 __drm_atomic_helper_plane_destroy_state(state);
76 kfree(to_mtk_plane_state(state));
77 }
78
mtk_plane_atomic_async_check(struct drm_plane * plane,struct drm_plane_state * state)79 static int mtk_plane_atomic_async_check(struct drm_plane *plane,
80 struct drm_plane_state *state)
81 {
82 struct drm_crtc_state *crtc_state;
83 int ret;
84
85 if (plane != state->crtc->cursor)
86 return -EINVAL;
87
88 if (!plane->state)
89 return -EINVAL;
90
91 if (!plane->state->fb)
92 return -EINVAL;
93
94 ret = mtk_drm_crtc_plane_check(state->crtc, plane,
95 to_mtk_plane_state(state));
96 if (ret)
97 return ret;
98
99 if (state->state)
100 crtc_state = drm_atomic_get_existing_crtc_state(state->state,
101 state->crtc);
102 else /* Special case for asynchronous cursor updates. */
103 crtc_state = state->crtc->state;
104
105 return drm_atomic_helper_check_plane_state(plane->state, crtc_state,
106 DRM_PLANE_HELPER_NO_SCALING,
107 DRM_PLANE_HELPER_NO_SCALING,
108 true, true);
109 }
110
mtk_plane_atomic_async_update(struct drm_plane * plane,struct drm_plane_state * new_state)111 static void mtk_plane_atomic_async_update(struct drm_plane *plane,
112 struct drm_plane_state *new_state)
113 {
114 struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
115
116 plane->state->crtc_x = new_state->crtc_x;
117 plane->state->crtc_y = new_state->crtc_y;
118 plane->state->crtc_h = new_state->crtc_h;
119 plane->state->crtc_w = new_state->crtc_w;
120 plane->state->src_x = new_state->src_x;
121 plane->state->src_y = new_state->src_y;
122 plane->state->src_h = new_state->src_h;
123 plane->state->src_w = new_state->src_w;
124 swap(plane->state->fb, new_state->fb);
125 state->pending.async_dirty = true;
126
127 mtk_drm_crtc_async_update(new_state->crtc, plane, new_state);
128 }
129
130 static const struct drm_plane_funcs mtk_plane_funcs = {
131 .update_plane = drm_atomic_helper_update_plane,
132 .disable_plane = drm_atomic_helper_disable_plane,
133 .destroy = drm_plane_cleanup,
134 .reset = mtk_plane_reset,
135 .atomic_duplicate_state = mtk_plane_duplicate_state,
136 .atomic_destroy_state = mtk_drm_plane_destroy_state,
137 };
138
mtk_plane_atomic_check(struct drm_plane * plane,struct drm_plane_state * state)139 static int mtk_plane_atomic_check(struct drm_plane *plane,
140 struct drm_plane_state *state)
141 {
142 struct drm_framebuffer *fb = state->fb;
143 struct drm_crtc_state *crtc_state;
144 int ret;
145
146 if (!fb)
147 return 0;
148
149 if (WARN_ON(!state->crtc))
150 return 0;
151
152 ret = mtk_drm_crtc_plane_check(state->crtc, plane,
153 to_mtk_plane_state(state));
154 if (ret)
155 return ret;
156
157 crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
158 if (IS_ERR(crtc_state))
159 return PTR_ERR(crtc_state);
160
161 return drm_atomic_helper_check_plane_state(state, crtc_state,
162 DRM_PLANE_HELPER_NO_SCALING,
163 DRM_PLANE_HELPER_NO_SCALING,
164 true, true);
165 }
166
mtk_plane_atomic_disable(struct drm_plane * plane,struct drm_plane_state * old_state)167 static void mtk_plane_atomic_disable(struct drm_plane *plane,
168 struct drm_plane_state *old_state)
169 {
170 struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
171
172 state->pending.enable = false;
173 wmb(); /* Make sure the above parameter is set before update */
174 state->pending.dirty = true;
175 }
176
mtk_plane_atomic_update(struct drm_plane * plane,struct drm_plane_state * old_state)177 static void mtk_plane_atomic_update(struct drm_plane *plane,
178 struct drm_plane_state *old_state)
179 {
180 struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
181 struct drm_crtc *crtc = plane->state->crtc;
182 struct drm_framebuffer *fb = plane->state->fb;
183 struct drm_gem_object *gem;
184 struct mtk_drm_gem_obj *mtk_gem;
185 unsigned int pitch, format;
186 dma_addr_t addr;
187
188 if (!crtc || WARN_ON(!fb))
189 return;
190
191 if (!plane->state->visible) {
192 mtk_plane_atomic_disable(plane, old_state);
193 return;
194 }
195
196 gem = fb->obj[0];
197 mtk_gem = to_mtk_gem_obj(gem);
198 addr = mtk_gem->dma_addr;
199 pitch = fb->pitches[0];
200 format = fb->format->format;
201
202 addr += (plane->state->src.x1 >> 16) * fb->format->cpp[0];
203 addr += (plane->state->src.y1 >> 16) * pitch;
204
205 state->pending.enable = true;
206 state->pending.pitch = pitch;
207 state->pending.format = format;
208 state->pending.addr = addr;
209 state->pending.x = plane->state->dst.x1;
210 state->pending.y = plane->state->dst.y1;
211 state->pending.width = drm_rect_width(&plane->state->dst);
212 state->pending.height = drm_rect_height(&plane->state->dst);
213 state->pending.rotation = plane->state->rotation;
214 wmb(); /* Make sure the above parameters are set before update */
215 state->pending.dirty = true;
216 }
217
218 static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
219 .prepare_fb = drm_gem_fb_prepare_fb,
220 .atomic_check = mtk_plane_atomic_check,
221 .atomic_update = mtk_plane_atomic_update,
222 .atomic_disable = mtk_plane_atomic_disable,
223 .atomic_async_update = mtk_plane_atomic_async_update,
224 .atomic_async_check = mtk_plane_atomic_async_check,
225 };
226
mtk_plane_init(struct drm_device * dev,struct drm_plane * plane,unsigned long possible_crtcs,enum drm_plane_type type,unsigned int supported_rotations)227 int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
228 unsigned long possible_crtcs, enum drm_plane_type type,
229 unsigned int supported_rotations)
230 {
231 int err;
232
233 err = drm_universal_plane_init(dev, plane, possible_crtcs,
234 &mtk_plane_funcs, formats,
235 ARRAY_SIZE(formats), NULL, type, NULL);
236 if (err) {
237 DRM_ERROR("failed to initialize plane\n");
238 return err;
239 }
240
241 if (supported_rotations & ~DRM_MODE_ROTATE_0) {
242 err = drm_plane_create_rotation_property(plane,
243 DRM_MODE_ROTATE_0,
244 supported_rotations);
245 if (err)
246 DRM_INFO("Create rotation property failed\n");
247 }
248
249 drm_plane_helper_add(plane, &mtk_plane_helper_funcs);
250
251 return 0;
252 }
253