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_atomic_uapi.h>
10 #include <drm/drm_fourcc.h>
11 #include <drm/drm_gem_atomic_helper.h>
12 #include <drm/drm_plane_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 }
48
49 __drm_atomic_helper_plane_reset(plane, &state->base);
50
51 state->base.plane = plane;
52 state->pending.format = DRM_FORMAT_RGB565;
53 }
54
mtk_plane_duplicate_state(struct drm_plane * plane)55 static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane)
56 {
57 struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state);
58 struct mtk_plane_state *state;
59
60 state = kmalloc(sizeof(*state), GFP_KERNEL);
61 if (!state)
62 return NULL;
63
64 __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
65
66 WARN_ON(state->base.plane != plane);
67
68 state->pending = old_state->pending;
69
70 return &state->base;
71 }
72
mtk_drm_plane_destroy_state(struct drm_plane * plane,struct drm_plane_state * state)73 static void mtk_drm_plane_destroy_state(struct drm_plane *plane,
74 struct drm_plane_state *state)
75 {
76 __drm_atomic_helper_plane_destroy_state(state);
77 kfree(to_mtk_plane_state(state));
78 }
79
mtk_plane_atomic_async_check(struct drm_plane * plane,struct drm_atomic_state * state)80 static int mtk_plane_atomic_async_check(struct drm_plane *plane,
81 struct drm_atomic_state *state)
82 {
83 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
84 plane);
85 struct drm_crtc_state *crtc_state;
86 int ret;
87
88 if (plane != new_plane_state->crtc->cursor)
89 return -EINVAL;
90
91 if (!plane->state)
92 return -EINVAL;
93
94 if (!plane->state->fb)
95 return -EINVAL;
96
97 ret = mtk_drm_crtc_plane_check(new_plane_state->crtc, plane,
98 to_mtk_plane_state(new_plane_state));
99 if (ret)
100 return ret;
101
102 if (state)
103 crtc_state = drm_atomic_get_existing_crtc_state(state,
104 new_plane_state->crtc);
105 else /* Special case for asynchronous cursor updates. */
106 crtc_state = new_plane_state->crtc->state;
107
108 return drm_atomic_helper_check_plane_state(plane->state, crtc_state,
109 DRM_PLANE_HELPER_NO_SCALING,
110 DRM_PLANE_HELPER_NO_SCALING,
111 true, true);
112 }
113
mtk_plane_update_new_state(struct drm_plane_state * new_state,struct mtk_plane_state * mtk_plane_state)114 static void mtk_plane_update_new_state(struct drm_plane_state *new_state,
115 struct mtk_plane_state *mtk_plane_state)
116 {
117 struct drm_framebuffer *fb = new_state->fb;
118 struct drm_gem_object *gem;
119 struct mtk_drm_gem_obj *mtk_gem;
120 unsigned int pitch, format;
121 dma_addr_t addr;
122
123 gem = fb->obj[0];
124 mtk_gem = to_mtk_gem_obj(gem);
125 addr = mtk_gem->dma_addr;
126 pitch = fb->pitches[0];
127 format = fb->format->format;
128
129 addr += (new_state->src.x1 >> 16) * fb->format->cpp[0];
130 addr += (new_state->src.y1 >> 16) * pitch;
131
132 mtk_plane_state->pending.enable = true;
133 mtk_plane_state->pending.pitch = pitch;
134 mtk_plane_state->pending.format = format;
135 mtk_plane_state->pending.addr = addr;
136 mtk_plane_state->pending.x = new_state->dst.x1;
137 mtk_plane_state->pending.y = new_state->dst.y1;
138 mtk_plane_state->pending.width = drm_rect_width(&new_state->dst);
139 mtk_plane_state->pending.height = drm_rect_height(&new_state->dst);
140 mtk_plane_state->pending.rotation = new_state->rotation;
141 }
142
mtk_plane_atomic_async_update(struct drm_plane * plane,struct drm_atomic_state * state)143 static void mtk_plane_atomic_async_update(struct drm_plane *plane,
144 struct drm_atomic_state *state)
145 {
146 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
147 plane);
148 struct mtk_plane_state *new_plane_state = to_mtk_plane_state(plane->state);
149
150 plane->state->crtc_x = new_state->crtc_x;
151 plane->state->crtc_y = new_state->crtc_y;
152 plane->state->crtc_h = new_state->crtc_h;
153 plane->state->crtc_w = new_state->crtc_w;
154 plane->state->src_x = new_state->src_x;
155 plane->state->src_y = new_state->src_y;
156 plane->state->src_h = new_state->src_h;
157 plane->state->src_w = new_state->src_w;
158 swap(plane->state->fb, new_state->fb);
159
160 mtk_plane_update_new_state(new_state, new_plane_state);
161 wmb(); /* Make sure the above parameters are set before update */
162 new_plane_state->pending.async_dirty = true;
163 mtk_drm_crtc_async_update(new_state->crtc, plane, state);
164 }
165
166 static const struct drm_plane_funcs mtk_plane_funcs = {
167 .update_plane = drm_atomic_helper_update_plane,
168 .disable_plane = drm_atomic_helper_disable_plane,
169 .destroy = drm_plane_cleanup,
170 .reset = mtk_plane_reset,
171 .atomic_duplicate_state = mtk_plane_duplicate_state,
172 .atomic_destroy_state = mtk_drm_plane_destroy_state,
173 };
174
mtk_plane_atomic_check(struct drm_plane * plane,struct drm_atomic_state * state)175 static int mtk_plane_atomic_check(struct drm_plane *plane,
176 struct drm_atomic_state *state)
177 {
178 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
179 plane);
180 struct drm_framebuffer *fb = new_plane_state->fb;
181 struct drm_crtc_state *crtc_state;
182 int ret;
183
184 if (!fb)
185 return 0;
186
187 if (WARN_ON(!new_plane_state->crtc))
188 return 0;
189
190 ret = mtk_drm_crtc_plane_check(new_plane_state->crtc, plane,
191 to_mtk_plane_state(new_plane_state));
192 if (ret)
193 return ret;
194
195 crtc_state = drm_atomic_get_crtc_state(state,
196 new_plane_state->crtc);
197 if (IS_ERR(crtc_state))
198 return PTR_ERR(crtc_state);
199
200 return drm_atomic_helper_check_plane_state(new_plane_state,
201 crtc_state,
202 DRM_PLANE_HELPER_NO_SCALING,
203 DRM_PLANE_HELPER_NO_SCALING,
204 true, true);
205 }
206
mtk_plane_atomic_disable(struct drm_plane * plane,struct drm_atomic_state * state)207 static void mtk_plane_atomic_disable(struct drm_plane *plane,
208 struct drm_atomic_state *state)
209 {
210 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
211 plane);
212 struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
213 mtk_plane_state->pending.enable = false;
214 wmb(); /* Make sure the above parameter is set before update */
215 mtk_plane_state->pending.dirty = true;
216 }
217
mtk_plane_atomic_update(struct drm_plane * plane,struct drm_atomic_state * state)218 static void mtk_plane_atomic_update(struct drm_plane *plane,
219 struct drm_atomic_state *state)
220 {
221 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
222 plane);
223 struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
224
225 if (!new_state->crtc || WARN_ON(!new_state->fb))
226 return;
227
228 if (!new_state->visible) {
229 mtk_plane_atomic_disable(plane, state);
230 return;
231 }
232
233 mtk_plane_update_new_state(new_state, mtk_plane_state);
234 wmb(); /* Make sure the above parameters are set before update */
235 mtk_plane_state->pending.dirty = true;
236 }
237
238 static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
239 .atomic_check = mtk_plane_atomic_check,
240 .atomic_update = mtk_plane_atomic_update,
241 .atomic_disable = mtk_plane_atomic_disable,
242 .atomic_async_update = mtk_plane_atomic_async_update,
243 .atomic_async_check = mtk_plane_atomic_async_check,
244 };
245
mtk_plane_init(struct drm_device * dev,struct drm_plane * plane,unsigned long possible_crtcs,enum drm_plane_type type,unsigned int supported_rotations)246 int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
247 unsigned long possible_crtcs, enum drm_plane_type type,
248 unsigned int supported_rotations)
249 {
250 int err;
251
252 err = drm_universal_plane_init(dev, plane, possible_crtcs,
253 &mtk_plane_funcs, formats,
254 ARRAY_SIZE(formats), NULL, type, NULL);
255 if (err) {
256 DRM_ERROR("failed to initialize plane\n");
257 return err;
258 }
259
260 if (supported_rotations & ~DRM_MODE_ROTATE_0) {
261 err = drm_plane_create_rotation_property(plane,
262 DRM_MODE_ROTATE_0,
263 supported_rotations);
264 if (err)
265 DRM_INFO("Create rotation property failed\n");
266 }
267
268 drm_plane_helper_add(plane, &mtk_plane_helper_funcs);
269
270 return 0;
271 }
272