xref: /linux/drivers/gpu/drm/omapdrm/omap_plane.c (revision 005438a8eef063495ac059d128eea71b58de50e5)
1 /*
2  * drivers/gpu/drm/omapdrm/omap_plane.c
3  *
4  * Copyright (C) 2011 Texas Instruments
5  * Author: Rob Clark <rob.clark@linaro.org>
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License version 2 as published by
9  * the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
14  * more details.
15  *
16  * You should have received a copy of the GNU General Public License along with
17  * this program.  If not, see <http://www.gnu.org/licenses/>.
18  */
19 
20 #include <drm/drm_atomic_helper.h>
21 #include <drm/drm_plane_helper.h>
22 
23 #include "omap_dmm_tiler.h"
24 #include "omap_drv.h"
25 
26 /* some hackery because omapdss has an 'enum omap_plane' (which would be
27  * better named omap_plane_id).. and compiler seems unhappy about having
28  * both a 'struct omap_plane' and 'enum omap_plane'
29  */
30 #define omap_plane _omap_plane
31 
32 /*
33  * plane funcs
34  */
35 
36 #define to_omap_plane(x) container_of(x, struct omap_plane, base)
37 
38 struct omap_plane {
39 	struct drm_plane base;
40 	int id;  /* TODO rename omap_plane -> omap_plane_id in omapdss so I can use the enum */
41 	const char *name;
42 
43 	uint32_t nformats;
44 	uint32_t formats[32];
45 
46 	struct omap_drm_irq error_irq;
47 };
48 
49 struct omap_plane_state {
50 	struct drm_plane_state base;
51 
52 	unsigned int zorder;
53 };
54 
55 static inline struct omap_plane_state *
56 to_omap_plane_state(struct drm_plane_state *state)
57 {
58 	return container_of(state, struct omap_plane_state, base);
59 }
60 
61 static int omap_plane_prepare_fb(struct drm_plane *plane,
62 				 struct drm_framebuffer *fb,
63 				 const struct drm_plane_state *new_state)
64 {
65 	return omap_framebuffer_pin(fb);
66 }
67 
68 static void omap_plane_cleanup_fb(struct drm_plane *plane,
69 				  struct drm_framebuffer *fb,
70 				  const struct drm_plane_state *old_state)
71 {
72 	omap_framebuffer_unpin(fb);
73 }
74 
75 static void omap_plane_atomic_update(struct drm_plane *plane,
76 				     struct drm_plane_state *old_state)
77 {
78 	struct omap_plane *omap_plane = to_omap_plane(plane);
79 	struct drm_plane_state *state = plane->state;
80 	struct omap_plane_state *omap_state = to_omap_plane_state(state);
81 	struct omap_overlay_info info;
82 	struct omap_drm_window win;
83 	int ret;
84 
85 	DBG("%s, crtc=%p fb=%p", omap_plane->name, state->crtc, state->fb);
86 
87 	memset(&info, 0, sizeof(info));
88 	info.rotation_type = OMAP_DSS_ROT_DMA;
89 	info.rotation = OMAP_DSS_ROT_0;
90 	info.global_alpha = 0xff;
91 	info.mirror = 0;
92 	info.zorder = omap_state->zorder;
93 
94 	memset(&win, 0, sizeof(win));
95 	win.rotation = state->rotation;
96 	win.crtc_x = state->crtc_x;
97 	win.crtc_y = state->crtc_y;
98 	win.crtc_w = state->crtc_w;
99 	win.crtc_h = state->crtc_h;
100 
101 	/*
102 	 * src values are in Q16 fixed point, convert to integer.
103 	 * omap_framebuffer_update_scanout() takes adjusted src.
104 	 */
105 	win.src_x = state->src_x >> 16;
106 	win.src_y = state->src_y >> 16;
107 
108 	switch (state->rotation & 0xf) {
109 	case BIT(DRM_ROTATE_90):
110 	case BIT(DRM_ROTATE_270):
111 		win.src_w = state->src_h >> 16;
112 		win.src_h = state->src_w >> 16;
113 		break;
114 	default:
115 		win.src_w = state->src_w >> 16;
116 		win.src_h = state->src_h >> 16;
117 		break;
118 	}
119 
120 	/* update scanout: */
121 	omap_framebuffer_update_scanout(state->fb, &win, &info);
122 
123 	DBG("%dx%d -> %dx%d (%d)", info.width, info.height,
124 			info.out_width, info.out_height,
125 			info.screen_width);
126 	DBG("%d,%d %pad %pad", info.pos_x, info.pos_y,
127 			&info.paddr, &info.p_uv_addr);
128 
129 	dispc_ovl_set_channel_out(omap_plane->id,
130 				  omap_crtc_channel(state->crtc));
131 
132 	/* and finally, update omapdss: */
133 	ret = dispc_ovl_setup(omap_plane->id, &info, false,
134 			      omap_crtc_timings(state->crtc), false);
135 	if (WARN_ON(ret)) {
136 		dispc_ovl_enable(omap_plane->id, false);
137 		return;
138 	}
139 
140 	dispc_ovl_enable(omap_plane->id, true);
141 }
142 
143 static void omap_plane_atomic_disable(struct drm_plane *plane,
144 				      struct drm_plane_state *old_state)
145 {
146 	struct omap_plane_state *omap_state = to_omap_plane_state(plane->state);
147 	struct omap_plane *omap_plane = to_omap_plane(plane);
148 
149 	plane->state->rotation = BIT(DRM_ROTATE_0);
150 	omap_state->zorder = plane->type == DRM_PLANE_TYPE_PRIMARY
151 			   ? 0 : omap_plane->id;
152 
153 	dispc_ovl_enable(omap_plane->id, false);
154 }
155 
156 static const struct drm_plane_helper_funcs omap_plane_helper_funcs = {
157 	.prepare_fb = omap_plane_prepare_fb,
158 	.cleanup_fb = omap_plane_cleanup_fb,
159 	.atomic_update = omap_plane_atomic_update,
160 	.atomic_disable = omap_plane_atomic_disable,
161 };
162 
163 static void omap_plane_reset(struct drm_plane *plane)
164 {
165 	struct omap_plane *omap_plane = to_omap_plane(plane);
166 	struct omap_plane_state *omap_state;
167 
168 	if (plane->state && plane->state->fb)
169 		drm_framebuffer_unreference(plane->state->fb);
170 
171 	kfree(plane->state);
172 	plane->state = NULL;
173 
174 	omap_state = kzalloc(sizeof(*omap_state), GFP_KERNEL);
175 	if (omap_state == NULL)
176 		return;
177 
178 	/*
179 	 * Set defaults depending on whether we are a primary or overlay
180 	 * plane.
181 	 */
182 	omap_state->zorder = plane->type == DRM_PLANE_TYPE_PRIMARY
183 			   ? 0 : omap_plane->id;
184 	omap_state->base.rotation = BIT(DRM_ROTATE_0);
185 
186 	plane->state = &omap_state->base;
187 	plane->state->plane = plane;
188 }
189 
190 static void omap_plane_destroy(struct drm_plane *plane)
191 {
192 	struct omap_plane *omap_plane = to_omap_plane(plane);
193 
194 	DBG("%s", omap_plane->name);
195 
196 	omap_irq_unregister(plane->dev, &omap_plane->error_irq);
197 
198 	drm_plane_cleanup(plane);
199 
200 	kfree(omap_plane);
201 }
202 
203 /* helper to install properties which are common to planes and crtcs */
204 void omap_plane_install_properties(struct drm_plane *plane,
205 		struct drm_mode_object *obj)
206 {
207 	struct drm_device *dev = plane->dev;
208 	struct omap_drm_private *priv = dev->dev_private;
209 
210 	if (priv->has_dmm) {
211 		struct drm_property *prop = dev->mode_config.rotation_property;
212 
213 		drm_object_attach_property(obj, prop, 0);
214 	}
215 
216 	drm_object_attach_property(obj, priv->zorder_prop, 0);
217 }
218 
219 static struct drm_plane_state *
220 omap_plane_atomic_duplicate_state(struct drm_plane *plane)
221 {
222 	struct omap_plane_state *state;
223 	struct omap_plane_state *copy;
224 
225 	if (WARN_ON(!plane->state))
226 		return NULL;
227 
228 	state = to_omap_plane_state(plane->state);
229 	copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
230 	if (copy == NULL)
231 		return NULL;
232 
233 	__drm_atomic_helper_plane_duplicate_state(plane, &copy->base);
234 
235 	return &copy->base;
236 }
237 
238 static void omap_plane_atomic_destroy_state(struct drm_plane *plane,
239 					    struct drm_plane_state *state)
240 {
241 	__drm_atomic_helper_plane_destroy_state(plane, state);
242 	kfree(to_omap_plane_state(state));
243 }
244 
245 static int omap_plane_atomic_set_property(struct drm_plane *plane,
246 					  struct drm_plane_state *state,
247 					  struct drm_property *property,
248 					  uint64_t val)
249 {
250 	struct omap_drm_private *priv = plane->dev->dev_private;
251 	struct omap_plane_state *omap_state = to_omap_plane_state(state);
252 
253 	if (property == priv->zorder_prop)
254 		omap_state->zorder = val;
255 	else
256 		return -EINVAL;
257 
258 	return 0;
259 }
260 
261 static int omap_plane_atomic_get_property(struct drm_plane *plane,
262 					  const struct drm_plane_state *state,
263 					  struct drm_property *property,
264 					  uint64_t *val)
265 {
266 	struct omap_drm_private *priv = plane->dev->dev_private;
267 	const struct omap_plane_state *omap_state =
268 		container_of(state, const struct omap_plane_state, base);
269 
270 	if (property == priv->zorder_prop)
271 		*val = omap_state->zorder;
272 	else
273 		return -EINVAL;
274 
275 	return 0;
276 }
277 
278 static const struct drm_plane_funcs omap_plane_funcs = {
279 	.update_plane = drm_atomic_helper_update_plane,
280 	.disable_plane = drm_atomic_helper_disable_plane,
281 	.reset = omap_plane_reset,
282 	.destroy = omap_plane_destroy,
283 	.set_property = drm_atomic_helper_plane_set_property,
284 	.atomic_duplicate_state = omap_plane_atomic_duplicate_state,
285 	.atomic_destroy_state = omap_plane_atomic_destroy_state,
286 	.atomic_set_property = omap_plane_atomic_set_property,
287 	.atomic_get_property = omap_plane_atomic_get_property,
288 };
289 
290 static void omap_plane_error_irq(struct omap_drm_irq *irq, uint32_t irqstatus)
291 {
292 	struct omap_plane *omap_plane =
293 			container_of(irq, struct omap_plane, error_irq);
294 	DRM_ERROR_RATELIMITED("%s: errors: %08x\n", omap_plane->name,
295 		irqstatus);
296 }
297 
298 static const char *plane_names[] = {
299 	[OMAP_DSS_GFX] = "gfx",
300 	[OMAP_DSS_VIDEO1] = "vid1",
301 	[OMAP_DSS_VIDEO2] = "vid2",
302 	[OMAP_DSS_VIDEO3] = "vid3",
303 };
304 
305 static const uint32_t error_irqs[] = {
306 	[OMAP_DSS_GFX] = DISPC_IRQ_GFX_FIFO_UNDERFLOW,
307 	[OMAP_DSS_VIDEO1] = DISPC_IRQ_VID1_FIFO_UNDERFLOW,
308 	[OMAP_DSS_VIDEO2] = DISPC_IRQ_VID2_FIFO_UNDERFLOW,
309 	[OMAP_DSS_VIDEO3] = DISPC_IRQ_VID3_FIFO_UNDERFLOW,
310 };
311 
312 /* initialize plane */
313 struct drm_plane *omap_plane_init(struct drm_device *dev,
314 		int id, enum drm_plane_type type)
315 {
316 	struct omap_drm_private *priv = dev->dev_private;
317 	struct drm_plane *plane;
318 	struct omap_plane *omap_plane;
319 	int ret;
320 
321 	DBG("%s: type=%d", plane_names[id], type);
322 
323 	omap_plane = kzalloc(sizeof(*omap_plane), GFP_KERNEL);
324 	if (!omap_plane)
325 		return ERR_PTR(-ENOMEM);
326 
327 	omap_plane->nformats = omap_framebuffer_get_formats(
328 			omap_plane->formats, ARRAY_SIZE(omap_plane->formats),
329 			dss_feat_get_supported_color_modes(id));
330 	omap_plane->id = id;
331 	omap_plane->name = plane_names[id];
332 
333 	plane = &omap_plane->base;
334 
335 	omap_plane->error_irq.irqmask = error_irqs[id];
336 	omap_plane->error_irq.irq = omap_plane_error_irq;
337 	omap_irq_register(dev, &omap_plane->error_irq);
338 
339 	ret = drm_universal_plane_init(dev, plane, (1 << priv->num_crtcs) - 1,
340 				       &omap_plane_funcs, omap_plane->formats,
341 				       omap_plane->nformats, type);
342 	if (ret < 0)
343 		goto error;
344 
345 	drm_plane_helper_add(plane, &omap_plane_helper_funcs);
346 
347 	omap_plane_install_properties(plane, &plane->base);
348 
349 	return plane;
350 
351 error:
352 	omap_irq_unregister(plane->dev, &omap_plane->error_irq);
353 	kfree(omap_plane);
354 	return NULL;
355 }
356