1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
4  * Author: Rob Clark <rob.clark@linaro.org>
5  */
6 
7 #include <drm/drm_atomic.h>
8 #include <drm/drm_atomic_helper.h>
9 #include <drm/drm_plane_helper.h>
10 
11 #include "omap_dmm_tiler.h"
12 #include "omap_drv.h"
13 
14 /*
15  * plane funcs
16  */
17 
18 #define to_omap_plane(x) container_of(x, struct omap_plane, base)
19 
20 struct omap_plane {
21 	struct drm_plane base;
22 	enum omap_plane_id id;
23 	const char *name;
24 };
25 
26 static int omap_plane_prepare_fb(struct drm_plane *plane,
27 				 struct drm_plane_state *new_state)
28 {
29 	if (!new_state->fb)
30 		return 0;
31 
32 	return omap_framebuffer_pin(new_state->fb);
33 }
34 
35 static void omap_plane_cleanup_fb(struct drm_plane *plane,
36 				  struct drm_plane_state *old_state)
37 {
38 	if (old_state->fb)
39 		omap_framebuffer_unpin(old_state->fb);
40 }
41 
42 static void omap_plane_atomic_update(struct drm_plane *plane,
43 				     struct drm_plane_state *old_state)
44 {
45 	struct omap_drm_private *priv = plane->dev->dev_private;
46 	struct omap_plane *omap_plane = to_omap_plane(plane);
47 	struct drm_plane_state *state = plane->state;
48 	struct omap_overlay_info info;
49 	int ret;
50 
51 	DBG("%s, crtc=%p fb=%p", omap_plane->name, state->crtc, state->fb);
52 
53 	memset(&info, 0, sizeof(info));
54 	info.rotation_type = OMAP_DSS_ROT_NONE;
55 	info.rotation = DRM_MODE_ROTATE_0;
56 	info.global_alpha = state->alpha >> 8;
57 	info.zorder = state->normalized_zpos;
58 	if (state->pixel_blend_mode == DRM_MODE_BLEND_PREMULTI)
59 		info.pre_mult_alpha = 1;
60 	else
61 		info.pre_mult_alpha = 0;
62 
63 	/* update scanout: */
64 	omap_framebuffer_update_scanout(state->fb, state, &info);
65 
66 	DBG("%dx%d -> %dx%d (%d)", info.width, info.height,
67 			info.out_width, info.out_height,
68 			info.screen_width);
69 	DBG("%d,%d %pad %pad", info.pos_x, info.pos_y,
70 			&info.paddr, &info.p_uv_addr);
71 
72 	/* and finally, update omapdss: */
73 	ret = priv->dispc_ops->ovl_setup(priv->dispc, omap_plane->id, &info,
74 			      omap_crtc_timings(state->crtc), false,
75 			      omap_crtc_channel(state->crtc));
76 	if (ret) {
77 		dev_err(plane->dev->dev, "Failed to setup plane %s\n",
78 			omap_plane->name);
79 		priv->dispc_ops->ovl_enable(priv->dispc, omap_plane->id, false);
80 		return;
81 	}
82 
83 	priv->dispc_ops->ovl_enable(priv->dispc, omap_plane->id, true);
84 }
85 
86 static void omap_plane_atomic_disable(struct drm_plane *plane,
87 				      struct drm_plane_state *old_state)
88 {
89 	struct omap_drm_private *priv = plane->dev->dev_private;
90 	struct omap_plane *omap_plane = to_omap_plane(plane);
91 
92 	plane->state->rotation = DRM_MODE_ROTATE_0;
93 	plane->state->zpos = plane->type == DRM_PLANE_TYPE_PRIMARY
94 			   ? 0 : omap_plane->id;
95 
96 	priv->dispc_ops->ovl_enable(priv->dispc, omap_plane->id, false);
97 }
98 
99 static int omap_plane_atomic_check(struct drm_plane *plane,
100 				   struct drm_plane_state *state)
101 {
102 	struct drm_crtc_state *crtc_state;
103 
104 	if (!state->fb)
105 		return 0;
106 
107 	/* crtc should only be NULL when disabling (i.e., !state->fb) */
108 	if (WARN_ON(!state->crtc))
109 		return 0;
110 
111 	crtc_state = drm_atomic_get_existing_crtc_state(state->state, state->crtc);
112 	/* we should have a crtc state if the plane is attached to a crtc */
113 	if (WARN_ON(!crtc_state))
114 		return 0;
115 
116 	if (!crtc_state->enable)
117 		return 0;
118 
119 	if (state->crtc_x < 0 || state->crtc_y < 0)
120 		return -EINVAL;
121 
122 	if (state->crtc_x + state->crtc_w > crtc_state->adjusted_mode.hdisplay)
123 		return -EINVAL;
124 
125 	if (state->crtc_y + state->crtc_h > crtc_state->adjusted_mode.vdisplay)
126 		return -EINVAL;
127 
128 	if (state->rotation != DRM_MODE_ROTATE_0 &&
129 	    !omap_framebuffer_supports_rotation(state->fb))
130 		return -EINVAL;
131 
132 	return 0;
133 }
134 
135 static const struct drm_plane_helper_funcs omap_plane_helper_funcs = {
136 	.prepare_fb = omap_plane_prepare_fb,
137 	.cleanup_fb = omap_plane_cleanup_fb,
138 	.atomic_check = omap_plane_atomic_check,
139 	.atomic_update = omap_plane_atomic_update,
140 	.atomic_disable = omap_plane_atomic_disable,
141 };
142 
143 static void omap_plane_destroy(struct drm_plane *plane)
144 {
145 	struct omap_plane *omap_plane = to_omap_plane(plane);
146 
147 	DBG("%s", omap_plane->name);
148 
149 	drm_plane_cleanup(plane);
150 
151 	kfree(omap_plane);
152 }
153 
154 /* helper to install properties which are common to planes and crtcs */
155 void omap_plane_install_properties(struct drm_plane *plane,
156 		struct drm_mode_object *obj)
157 {
158 	struct drm_device *dev = plane->dev;
159 	struct omap_drm_private *priv = dev->dev_private;
160 
161 	if (priv->has_dmm) {
162 		if (!plane->rotation_property)
163 			drm_plane_create_rotation_property(plane,
164 							   DRM_MODE_ROTATE_0,
165 							   DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_90 |
166 							   DRM_MODE_ROTATE_180 | DRM_MODE_ROTATE_270 |
167 							   DRM_MODE_REFLECT_X | DRM_MODE_REFLECT_Y);
168 
169 		/* Attach the rotation property also to the crtc object */
170 		if (plane->rotation_property && obj != &plane->base)
171 			drm_object_attach_property(obj, plane->rotation_property,
172 						   DRM_MODE_ROTATE_0);
173 	}
174 
175 	drm_object_attach_property(obj, priv->zorder_prop, 0);
176 }
177 
178 static void omap_plane_reset(struct drm_plane *plane)
179 {
180 	struct omap_plane *omap_plane = to_omap_plane(plane);
181 
182 	drm_atomic_helper_plane_reset(plane);
183 	if (!plane->state)
184 		return;
185 
186 	/*
187 	 * Set the zpos default depending on whether we are a primary or overlay
188 	 * plane.
189 	 */
190 	plane->state->zpos = plane->type == DRM_PLANE_TYPE_PRIMARY
191 			   ? 0 : omap_plane->id;
192 }
193 
194 static int omap_plane_atomic_set_property(struct drm_plane *plane,
195 					  struct drm_plane_state *state,
196 					  struct drm_property *property,
197 					  u64 val)
198 {
199 	struct omap_drm_private *priv = plane->dev->dev_private;
200 
201 	if (property == priv->zorder_prop)
202 		state->zpos = val;
203 	else
204 		return -EINVAL;
205 
206 	return 0;
207 }
208 
209 static int omap_plane_atomic_get_property(struct drm_plane *plane,
210 					  const struct drm_plane_state *state,
211 					  struct drm_property *property,
212 					  u64 *val)
213 {
214 	struct omap_drm_private *priv = plane->dev->dev_private;
215 
216 	if (property == priv->zorder_prop)
217 		*val = state->zpos;
218 	else
219 		return -EINVAL;
220 
221 	return 0;
222 }
223 
224 static const struct drm_plane_funcs omap_plane_funcs = {
225 	.update_plane = drm_atomic_helper_update_plane,
226 	.disable_plane = drm_atomic_helper_disable_plane,
227 	.reset = omap_plane_reset,
228 	.destroy = omap_plane_destroy,
229 	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
230 	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
231 	.atomic_set_property = omap_plane_atomic_set_property,
232 	.atomic_get_property = omap_plane_atomic_get_property,
233 };
234 
235 static const char *plane_id_to_name[] = {
236 	[OMAP_DSS_GFX] = "gfx",
237 	[OMAP_DSS_VIDEO1] = "vid1",
238 	[OMAP_DSS_VIDEO2] = "vid2",
239 	[OMAP_DSS_VIDEO3] = "vid3",
240 };
241 
242 static const enum omap_plane_id plane_idx_to_id[] = {
243 	OMAP_DSS_GFX,
244 	OMAP_DSS_VIDEO1,
245 	OMAP_DSS_VIDEO2,
246 	OMAP_DSS_VIDEO3,
247 };
248 
249 /* initialize plane */
250 struct drm_plane *omap_plane_init(struct drm_device *dev,
251 		int idx, enum drm_plane_type type,
252 		u32 possible_crtcs)
253 {
254 	struct omap_drm_private *priv = dev->dev_private;
255 	unsigned int num_planes = priv->dispc_ops->get_num_ovls(priv->dispc);
256 	struct drm_plane *plane;
257 	struct omap_plane *omap_plane;
258 	enum omap_plane_id id;
259 	int ret;
260 	u32 nformats;
261 	const u32 *formats;
262 
263 	if (WARN_ON(idx >= ARRAY_SIZE(plane_idx_to_id)))
264 		return ERR_PTR(-EINVAL);
265 
266 	id = plane_idx_to_id[idx];
267 
268 	DBG("%s: type=%d", plane_id_to_name[id], type);
269 
270 	omap_plane = kzalloc(sizeof(*omap_plane), GFP_KERNEL);
271 	if (!omap_plane)
272 		return ERR_PTR(-ENOMEM);
273 
274 	formats = priv->dispc_ops->ovl_get_color_modes(priv->dispc, id);
275 	for (nformats = 0; formats[nformats]; ++nformats)
276 		;
277 	omap_plane->id = id;
278 	omap_plane->name = plane_id_to_name[id];
279 
280 	plane = &omap_plane->base;
281 
282 	ret = drm_universal_plane_init(dev, plane, possible_crtcs,
283 				       &omap_plane_funcs, formats,
284 				       nformats, NULL, type, NULL);
285 	if (ret < 0)
286 		goto error;
287 
288 	drm_plane_helper_add(plane, &omap_plane_helper_funcs);
289 
290 	omap_plane_install_properties(plane, &plane->base);
291 	drm_plane_create_zpos_property(plane, 0, 0, num_planes - 1);
292 	drm_plane_create_alpha_property(plane);
293 	drm_plane_create_blend_mode_property(plane, BIT(DRM_MODE_BLEND_PREMULTI) |
294 					     BIT(DRM_MODE_BLEND_COVERAGE));
295 
296 	return plane;
297 
298 error:
299 	dev_err(dev->dev, "%s(): could not create plane: %s\n",
300 		__func__, plane_id_to_name[id]);
301 
302 	kfree(omap_plane);
303 	return NULL;
304 }
305