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
19static 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
37static struct drm_plane_state *
38sun4i_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
53static 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
63static 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
83static 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
114static 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
126static 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
131static 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
141static 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
169static 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
184static const uint64_t sun4i_layer_modifiers[] = {
185	DRM_FORMAT_MOD_LINEAR,
186	DRM_FORMAT_MOD_ALLWINNER_TILED,
187	DRM_FORMAT_MOD_INVALID
188};
189
190static 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
234struct 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