summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/omapdrm/omap_plane.c
blob: 891a4dc608af85f2760ced973c9cf5163743d08f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
/*
 * drivers/gpu/drm/omapdrm/omap_plane.c
 *
 * Copyright (C) 2011 Texas Instruments
 * Author: Rob Clark <rob.clark@linaro.org>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "drm_flip_work.h"

#include "omap_drv.h"
#include "omap_dmm_tiler.h"

/* some hackery because omapdss has an 'enum omap_plane' (which would be
 * better named omap_plane_id).. and compiler seems unhappy about having
 * both a 'struct omap_plane' and 'enum omap_plane'
 */
#define omap_plane _omap_plane

/*
 * plane funcs
 */

struct callback {
	void (*fxn)(void *);
	void *arg;
};

#define to_omap_plane(x) container_of(x, struct omap_plane, base)

struct omap_plane {
	struct drm_plane base;
	int id;  /* TODO rename omap_plane -> omap_plane_id in omapdss so I can use the enum */
	const char *name;
	struct omap_overlay_info info;
	struct omap_drm_apply apply;

	/* position/orientation of scanout within the fb: */
	struct omap_drm_window win;
	bool enabled;

	/* last fb that we pinned: */
	struct drm_framebuffer *pinned_fb;

	uint32_t nformats;
	uint32_t formats[32];

	struct omap_drm_irq error_irq;

	/* for deferring bo unpin's until next post_apply(): */
	struct drm_flip_work unpin_work;

	// XXX maybe get rid of this and handle vblank in crtc too?
	struct callback apply_done_cb;
};

static void unpin_worker(struct drm_flip_work *work, void *val)
{
	struct omap_plane *omap_plane =
			container_of(work, struct omap_plane, unpin_work);
	struct drm_device *dev = omap_plane->base.dev;

	omap_framebuffer_unpin(val);
	mutex_lock(&dev->mode_config.mutex);
	drm_framebuffer_unreference(val);
	mutex_unlock(&dev->mode_config.mutex);
}

/* update which fb (if any) is pinned for scanout */
static int update_pin(struct drm_plane *plane, struct drm_framebuffer *fb)
{
	struct omap_plane *omap_plane = to_omap_plane(plane);
	struct drm_framebuffer *pinned_fb = omap_plane->pinned_fb;

	if (pinned_fb != fb) {
		int ret = 0;

		DBG("%p -> %p", pinned_fb, fb);

		if (fb) {
			drm_framebuffer_reference(fb);
			ret = omap_framebuffer_pin(fb);
		}

		if (pinned_fb)
			drm_flip_work_queue(&omap_plane->unpin_work, pinned_fb);

		if (ret) {
			dev_err(plane->dev->dev, "could not swap %p -> %p\n",
					omap_plane->pinned_fb, fb);
			drm_framebuffer_unreference(fb);
			omap_plane->pinned_fb = NULL;
			return ret;
		}

		omap_plane->pinned_fb = fb;
	}

	return 0;
}

static void omap_plane_pre_apply(struct omap_drm_apply *apply)
{
	struct omap_plane *omap_plane =
			container_of(apply, struct omap_plane, apply);
	struct omap_drm_window *win = &omap_plane->win;
	struct drm_plane *plane = &omap_plane->base;
	struct drm_device *dev = plane->dev;
	struct omap_overlay_info *info = &omap_plane->info;
	struct drm_crtc *crtc = plane->crtc;
	enum omap_channel channel;
	bool enabled = omap_plane->enabled && crtc;
	bool ilace, replication;
	int ret;

	DBG("%s, enabled=%d", omap_plane->name, enabled);

	/* if fb has changed, pin new fb: */
	update_pin(plane, enabled ? plane->fb : NULL);

	if (!enabled) {
		dispc_ovl_enable(omap_plane->id, false);
		return;
	}

	channel = omap_crtc_channel(crtc);

	/* update scanout: */
	omap_framebuffer_update_scanout(plane->fb, win, info);

	DBG("%dx%d -> %dx%d (%d)", info->width, info->height,
			info->out_width, info->out_height,
			info->screen_width);
	DBG("%d,%d %pad %pad", info->pos_x, info->pos_y,
			&info->paddr, &info->p_uv_addr);

	/* TODO: */
	ilace = false;
	replication = false;

	/* and finally, update omapdss: */
	ret = dispc_ovl_setup(omap_plane->id, info,
			replication, omap_crtc_timings(crtc), false);
	if (ret) {
		dev_err(dev->dev, "dispc_ovl_setup failed: %d\n", ret);
		return;
	}

	dispc_ovl_enable(omap_plane->id, true);
	dispc_ovl_set_channel_out(omap_plane->id, channel);
}

static void omap_plane_post_apply(struct omap_drm_apply *apply)
{
	struct omap_plane *omap_plane =
			container_of(apply, struct omap_plane, apply);
	struct drm_plane *plane = &omap_plane->base;
	struct omap_drm_private *priv = plane->dev->dev_private;
	struct omap_overlay_info *info = &omap_plane->info;
	struct callback cb;

	cb = omap_plane->apply_done_cb;
	omap_plane->apply_done_cb.fxn = NULL;

	drm_flip_work_commit(&omap_plane->unpin_work, priv->wq);

	if (cb.fxn)
		cb.fxn(cb.arg);

	if (omap_plane->enabled) {
		omap_framebuffer_flush(plane->fb, info->pos_x, info->pos_y,
				info->out_width, info->out_height);
	}
}

static int apply(struct drm_plane *plane)
{
	if (plane->crtc) {
		struct omap_plane *omap_plane = to_omap_plane(plane);
		return omap_crtc_apply(plane->crtc, &omap_plane->apply);
	}
	return 0;
}

int omap_plane_mode_set(struct drm_plane *plane,
		struct drm_crtc *crtc, struct drm_framebuffer *fb,
		int crtc_x, int crtc_y,
		unsigned int crtc_w, unsigned int crtc_h,
		uint32_t src_x, uint32_t src_y,
		uint32_t src_w, uint32_t src_h,
		void (*fxn)(void *), void *arg)
{
	struct omap_plane *omap_plane = to_omap_plane(plane);
	struct omap_drm_window *win = &omap_plane->win;

	win->crtc_x = crtc_x;
	win->crtc_y = crtc_y;
	win->crtc_w = crtc_w;
	win->crtc_h = crtc_h;

	/* src values are in Q16 fixed point, convert to integer: */
	win->src_x = src_x >> 16;
	win->src_y = src_y >> 16;
	win->src_w = src_w >> 16;
	win->src_h = src_h >> 16;

	if (fxn) {
		/* omap_crtc should ensure that a new page flip
		 * isn't permitted while there is one pending:
		 */
		BUG_ON(omap_plane->apply_done_cb.fxn);

		omap_plane->apply_done_cb.fxn = fxn;
		omap_plane->apply_done_cb.arg = arg;
	}

	if (plane->fb)
		drm_framebuffer_unreference(plane->fb);

	drm_framebuffer_reference(fb);

	plane->fb = fb;
	plane->crtc = crtc;

	return apply(plane);
}

static int omap_plane_update(struct drm_plane *plane,
		struct drm_crtc *crtc, struct drm_framebuffer *fb,
		int crtc_x, int crtc_y,
		unsigned int crtc_w, unsigned int crtc_h,
		uint32_t src_x, uint32_t src_y,
		uint32_t src_w, uint32_t src_h)
{
	struct omap_plane *omap_plane = to_omap_plane(plane);
	omap_plane->enabled = true;

	/* omap_plane_mode_set() takes adjusted src */
	switch (omap_plane->win.rotation & 0xf) {
	case BIT(DRM_ROTATE_90):
	case BIT(DRM_ROTATE_270):
		swap(src_w, src_h);
		break;
	}

	return omap_plane_mode_set(plane, crtc, fb,
			crtc_x, crtc_y, crtc_w, crtc_h,
			src_x, src_y, src_w, src_h,
			NULL, NULL);
}

static int omap_plane_disable(struct drm_plane *plane)
{
	struct omap_plane *omap_plane = to_omap_plane(plane);
	omap_plane->win.rotation = BIT(DRM_ROTATE_0);
	return omap_plane_dpms(plane, DRM_MODE_DPMS_OFF);
}

static void omap_plane_destroy(struct drm_plane *plane)
{
	struct omap_plane *omap_plane = to_omap_plane(plane);

	DBG("%s", omap_plane->name);

	omap_irq_unregister(plane->dev, &omap_plane->error_irq);

	omap_plane_disable(plane);
	drm_plane_cleanup(plane);

	drm_flip_work_cleanup(&omap_plane->unpin_work);

	kfree(omap_plane);
}

int omap_plane_dpms(struct drm_plane *plane, int mode)
{
	struct omap_plane *omap_plane = to_omap_plane(plane);
	bool enabled = (mode == DRM_MODE_DPMS_ON);
	int ret = 0;

	if (enabled != omap_plane->enabled) {
		omap_plane->enabled = enabled;
		ret = apply(plane);
	}

	return ret;
}

/* helper to install properties which are common to planes and crtcs */
void omap_plane_install_properties(struct drm_plane *plane,
		struct drm_mode_object *obj)
{
	struct drm_device *dev = plane->dev;
	struct omap_drm_private *priv = dev->dev_private;
	struct drm_property *prop;

	if (priv->has_dmm) {
		prop = priv->rotation_prop;
		if (!prop) {
			prop = drm_mode_create_rotation_property(dev,
								 BIT(DRM_ROTATE_0) |
								 BIT(DRM_ROTATE_90) |
								 BIT(DRM_ROTATE_180) |
								 BIT(DRM_ROTATE_270) |
								 BIT(DRM_REFLECT_X) |
								 BIT(DRM_REFLECT_Y));
			if (prop == NULL)
				return;
			priv->rotation_prop = prop;
		}
		drm_object_attach_property(obj, prop, 0);
	}

	prop = priv->zorder_prop;
	if (!prop) {
		prop = drm_property_create_range(dev, 0, "zorder", 0, 3);
		if (prop == NULL)
			return;
		priv->zorder_prop = prop;
	}
	drm_object_attach_property(obj, prop, 0);
}

int omap_plane_set_property(struct drm_plane *plane,
		struct drm_property *property, uint64_t val)
{
	struct omap_plane *omap_plane = to_omap_plane(plane);
	struct omap_drm_private *priv = plane->dev->dev_private;
	int ret = -EINVAL;

	if (property == priv->rotation_prop) {
		DBG("%s: rotation: %02x", omap_plane->name, (uint32_t)val);
		omap_plane->win.rotation = val;
		ret = apply(plane);
	} else if (property == priv->zorder_prop) {
		DBG("%s: zorder: %02x", omap_plane->name, (uint32_t)val);
		omap_plane->info.zorder = val;
		ret = apply(plane);
	}

	return ret;
}

static const struct drm_plane_funcs omap_plane_funcs = {
		.update_plane = omap_plane_update,
		.disable_plane = omap_plane_disable,
		.destroy = omap_plane_destroy,
		.set_property = omap_plane_set_property,
};

static void omap_plane_error_irq(struct omap_drm_irq *irq, uint32_t irqstatus)
{
	struct omap_plane *omap_plane =
			container_of(irq, struct omap_plane, error_irq);
	DRM_ERROR("%s: errors: %08x\n", omap_plane->name, irqstatus);
}

static const char *plane_names[] = {
		[OMAP_DSS_GFX] = "gfx",
		[OMAP_DSS_VIDEO1] = "vid1",
		[OMAP_DSS_VIDEO2] = "vid2",
		[OMAP_DSS_VIDEO3] = "vid3",
};

static const uint32_t error_irqs[] = {
		[OMAP_DSS_GFX] = DISPC_IRQ_GFX_FIFO_UNDERFLOW,
		[OMAP_DSS_VIDEO1] = DISPC_IRQ_VID1_FIFO_UNDERFLOW,
		[OMAP_DSS_VIDEO2] = DISPC_IRQ_VID2_FIFO_UNDERFLOW,
		[OMAP_DSS_VIDEO3] = DISPC_IRQ_VID3_FIFO_UNDERFLOW,
};

/* initialize plane */
struct drm_plane *omap_plane_init(struct drm_device *dev,
		int id, bool private_plane)
{
	struct omap_drm_private *priv = dev->dev_private;
	struct drm_plane *plane = NULL;
	struct omap_plane *omap_plane;
	struct omap_overlay_info *info;
	int ret;

	DBG("%s: priv=%d", plane_names[id], private_plane);

	omap_plane = kzalloc(sizeof(*omap_plane), GFP_KERNEL);
	if (!omap_plane)
		goto fail;

	ret = drm_flip_work_init(&omap_plane->unpin_work, 16,
			"unpin", unpin_worker);
	if (ret) {
		dev_err(dev->dev, "could not allocate unpin FIFO\n");
		goto fail;
	}

	omap_plane->nformats = omap_framebuffer_get_formats(
			omap_plane->formats, ARRAY_SIZE(omap_plane->formats),
			dss_feat_get_supported_color_modes(id));
	omap_plane->id = id;
	omap_plane->name = plane_names[id];

	plane = &omap_plane->base;

	omap_plane->apply.pre_apply  = omap_plane_pre_apply;
	omap_plane->apply.post_apply = omap_plane_post_apply;

	omap_plane->error_irq.irqmask = error_irqs[id];
	omap_plane->error_irq.irq = omap_plane_error_irq;
	omap_irq_register(dev, &omap_plane->error_irq);

	drm_plane_init(dev, plane, (1 << priv->num_crtcs) - 1, &omap_plane_funcs,
			omap_plane->formats, omap_plane->nformats, private_plane);

	omap_plane_install_properties(plane, &plane->base);

	/* get our starting configuration, set defaults for parameters
	 * we don't currently use, etc:
	 */
	info = &omap_plane->info;
	info->rotation_type = OMAP_DSS_ROT_DMA;
	info->rotation = OMAP_DSS_ROT_0;
	info->global_alpha = 0xff;
	info->mirror = 0;

	/* Set defaults depending on whether we are a CRTC or overlay
	 * layer.
	 * TODO add ioctl to give userspace an API to change this.. this
	 * will come in a subsequent patch.
	 */
	if (private_plane)
		omap_plane->info.zorder = 0;
	else
		omap_plane->info.zorder = id;

	return plane;

fail:
	if (plane)
		omap_plane_destroy(plane);

	return NULL;
}