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