1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright (C) 2015 Free Electrons
4  * Copyright (C) 2015 NextThing Co
5  *
6  * Maxime Ripard <maxime.ripard@free-electrons.com>
7  */
8 
9 #include <drm/drm_atomic.h>
10 #include <drm/drm_atomic_helper.h>
11 #include <drm/drm_blend.h>
12 #include <drm/drm_gem_atomic_helper.h>
13 
14 #include "sun4i_backend.h"
15 #include "sun4i_frontend.h"
16 #include "sun4i_layer.h"
17 #include "sunxi_engine.h"
18 
19 static void sun4i_backend_layer_reset(struct drm_plane *plane)
20 {
21 	struct sun4i_layer_state *state;
22 
23 	if (plane->state) {
24 		state = state_to_sun4i_layer_state(plane->state);
25 
26 		__drm_atomic_helper_plane_destroy_state(&state->state);
27 
28 		kfree(state);
29 		plane->state = NULL;
30 	}
31 
32 	state = kzalloc(sizeof(*state), GFP_KERNEL);
33 	if (state)
34 		__drm_atomic_helper_plane_reset(plane, &state->state);
35 }
36 
37 static struct drm_plane_state *
38 sun4i_backend_layer_duplicate_state(struct drm_plane *plane)
39 {
40 	struct sun4i_layer_state *orig = state_to_sun4i_layer_state(plane->state);
41 	struct sun4i_layer_state *copy;
42 
43 	copy = kzalloc(sizeof(*copy), GFP_KERNEL);
44 	if (!copy)
45 		return NULL;
46 
47 	__drm_atomic_helper_plane_duplicate_state(plane, &copy->state);
48 	copy->uses_frontend = orig->uses_frontend;
49 
50 	return &copy->state;
51 }
52 
53 static void sun4i_backend_layer_destroy_state(struct drm_plane *plane,
54 					      struct drm_plane_state *state)
55 {
56 	struct sun4i_layer_state *s_state = state_to_sun4i_layer_state(state);
57 
58 	__drm_atomic_helper_plane_destroy_state(state);
59 
60 	kfree(s_state);
61 }
62 
63 static void sun4i_backend_layer_atomic_disable(struct drm_plane *plane,
64 					       struct drm_atomic_state *state)
65 {
66 	struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
67 									   plane);
68 	struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(old_state);
69 	struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
70 	struct sun4i_backend *backend = layer->backend;
71 
72 	sun4i_backend_layer_enable(backend, layer->id, false);
73 
74 	if (layer_state->uses_frontend) {
75 		unsigned long flags;
76 
77 		spin_lock_irqsave(&backend->frontend_lock, flags);
78 		backend->frontend_teardown = true;
79 		spin_unlock_irqrestore(&backend->frontend_lock, flags);
80 	}
81 }
82 
83 static void sun4i_backend_layer_atomic_update(struct drm_plane *plane,
84 					      struct drm_atomic_state *state)
85 {
86 	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
87 									   plane);
88 	struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(new_state);
89 	struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
90 	struct sun4i_backend *backend = layer->backend;
91 	struct sun4i_frontend *frontend = backend->frontend;
92 
93 	sun4i_backend_cleanup_layer(backend, layer->id);
94 
95 	if (layer_state->uses_frontend) {
96 		sun4i_frontend_init(frontend);
97 		sun4i_frontend_update_coord(frontend, plane);
98 		sun4i_frontend_update_buffer(frontend, plane);
99 		sun4i_frontend_update_formats(frontend, plane,
100 					      DRM_FORMAT_XRGB8888);
101 		sun4i_backend_update_layer_frontend(backend, layer->id,
102 						    DRM_FORMAT_XRGB8888);
103 		sun4i_frontend_enable(frontend);
104 	} else {
105 		sun4i_backend_update_layer_formats(backend, layer->id, plane);
106 		sun4i_backend_update_layer_buffer(backend, layer->id, plane);
107 	}
108 
109 	sun4i_backend_update_layer_coord(backend, layer->id, plane);
110 	sun4i_backend_update_layer_zpos(backend, layer->id, plane);
111 	sun4i_backend_layer_enable(backend, layer->id, true);
112 }
113 
114 static bool sun4i_layer_format_mod_supported(struct drm_plane *plane,
115 					     uint32_t format, uint64_t modifier)
116 {
117 	struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
118 
119 	if (IS_ERR_OR_NULL(layer->backend->frontend))
120 		return sun4i_backend_format_is_supported(format, modifier);
121 
122 	return sun4i_backend_format_is_supported(format, modifier) ||
123 	       sun4i_frontend_format_is_supported(format, modifier);
124 }
125 
126 static const struct drm_plane_helper_funcs sun4i_backend_layer_helper_funcs = {
127 	.atomic_disable	= sun4i_backend_layer_atomic_disable,
128 	.atomic_update	= sun4i_backend_layer_atomic_update,
129 };
130 
131 static const struct drm_plane_funcs sun4i_backend_layer_funcs = {
132 	.atomic_destroy_state	= sun4i_backend_layer_destroy_state,
133 	.atomic_duplicate_state	= sun4i_backend_layer_duplicate_state,
134 	.destroy		= drm_plane_cleanup,
135 	.disable_plane		= drm_atomic_helper_disable_plane,
136 	.reset			= sun4i_backend_layer_reset,
137 	.update_plane		= drm_atomic_helper_update_plane,
138 	.format_mod_supported	= sun4i_layer_format_mod_supported,
139 };
140 
141 static const uint32_t sun4i_layer_formats[] = {
142 	DRM_FORMAT_ARGB8888,
143 	DRM_FORMAT_ARGB4444,
144 	DRM_FORMAT_ARGB1555,
145 	DRM_FORMAT_BGRX8888,
146 	DRM_FORMAT_RGBA5551,
147 	DRM_FORMAT_RGBA4444,
148 	DRM_FORMAT_RGB888,
149 	DRM_FORMAT_RGB565,
150 	DRM_FORMAT_NV12,
151 	DRM_FORMAT_NV16,
152 	DRM_FORMAT_NV21,
153 	DRM_FORMAT_NV61,
154 	DRM_FORMAT_UYVY,
155 	DRM_FORMAT_VYUY,
156 	DRM_FORMAT_XRGB8888,
157 	DRM_FORMAT_YUV411,
158 	DRM_FORMAT_YUV420,
159 	DRM_FORMAT_YUV422,
160 	DRM_FORMAT_YUV444,
161 	DRM_FORMAT_YUYV,
162 	DRM_FORMAT_YVU411,
163 	DRM_FORMAT_YVU420,
164 	DRM_FORMAT_YVU422,
165 	DRM_FORMAT_YVU444,
166 	DRM_FORMAT_YVYU,
167 };
168 
169 static const uint32_t sun4i_backend_layer_formats[] = {
170 	DRM_FORMAT_ARGB8888,
171 	DRM_FORMAT_ARGB4444,
172 	DRM_FORMAT_ARGB1555,
173 	DRM_FORMAT_RGBA5551,
174 	DRM_FORMAT_RGBA4444,
175 	DRM_FORMAT_RGB888,
176 	DRM_FORMAT_RGB565,
177 	DRM_FORMAT_UYVY,
178 	DRM_FORMAT_VYUY,
179 	DRM_FORMAT_XRGB8888,
180 	DRM_FORMAT_YUYV,
181 	DRM_FORMAT_YVYU,
182 };
183 
184 static const uint64_t sun4i_layer_modifiers[] = {
185 	DRM_FORMAT_MOD_LINEAR,
186 	DRM_FORMAT_MOD_ALLWINNER_TILED,
187 	DRM_FORMAT_MOD_INVALID
188 };
189 
190 static struct sun4i_layer *sun4i_layer_init_one(struct drm_device *drm,
191 						struct sun4i_backend *backend,
192 						enum drm_plane_type type,
193 						unsigned int id)
194 {
195 	const uint64_t *modifiers = sun4i_layer_modifiers;
196 	const uint32_t *formats = sun4i_layer_formats;
197 	unsigned int formats_len = ARRAY_SIZE(sun4i_layer_formats);
198 	struct sun4i_layer *layer;
199 	int ret;
200 
201 	layer = devm_kzalloc(drm->dev, sizeof(*layer), GFP_KERNEL);
202 	if (!layer)
203 		return ERR_PTR(-ENOMEM);
204 
205 	layer->id = id;
206 	layer->backend = backend;
207 
208 	if (IS_ERR_OR_NULL(backend->frontend)) {
209 		formats = sun4i_backend_layer_formats;
210 		formats_len = ARRAY_SIZE(sun4i_backend_layer_formats);
211 		modifiers = NULL;
212 	}
213 
214 	/* possible crtcs are set later */
215 	ret = drm_universal_plane_init(drm, &layer->plane, 0,
216 				       &sun4i_backend_layer_funcs,
217 				       formats, formats_len,
218 				       modifiers, type, NULL);
219 	if (ret) {
220 		dev_err(drm->dev, "Couldn't initialize layer\n");
221 		return ERR_PTR(ret);
222 	}
223 
224 	drm_plane_helper_add(&layer->plane,
225 			     &sun4i_backend_layer_helper_funcs);
226 
227 	drm_plane_create_alpha_property(&layer->plane);
228 	drm_plane_create_zpos_property(&layer->plane, layer->id,
229 				       0, SUN4I_BACKEND_NUM_LAYERS - 1);
230 
231 	return layer;
232 }
233 
234 struct drm_plane **sun4i_layers_init(struct drm_device *drm,
235 				     struct sunxi_engine *engine)
236 {
237 	struct drm_plane **planes;
238 	struct sun4i_backend *backend = engine_to_sun4i_backend(engine);
239 	int i;
240 
241 	/* We need to have a sentinel at the need, hence the overallocation */
242 	planes = devm_kcalloc(drm->dev, SUN4I_BACKEND_NUM_LAYERS + 1,
243 			      sizeof(*planes), GFP_KERNEL);
244 	if (!planes)
245 		return ERR_PTR(-ENOMEM);
246 
247 	for (i = 0; i < SUN4I_BACKEND_NUM_LAYERS; i++) {
248 		enum drm_plane_type type = i ? DRM_PLANE_TYPE_OVERLAY : DRM_PLANE_TYPE_PRIMARY;
249 		struct sun4i_layer *layer;
250 
251 		layer = sun4i_layer_init_one(drm, backend, type, i);
252 		if (IS_ERR(layer)) {
253 			dev_err(drm->dev, "Couldn't initialize %s plane\n",
254 				i ? "overlay" : "primary");
255 			return ERR_CAST(layer);
256 		}
257 
258 		planes[i] = &layer->plane;
259 	}
260 
261 	return planes;
262 }
263