apply.c 16.9 KB
Newer Older
T
Tomi Valkeinen 已提交
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
/*
 * Copyright (C) 2011 Texas Instruments
 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
 *
 * 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/>.
 */

#define DSS_SUBSYS_NAME "APPLY"

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/jiffies.h>

#include <video/omapdss.h>

#include "dss.h"
#include "dss_features.h"

/*
 * We have 4 levels of cache for the dispc settings. First two are in SW and
 * the latter two in HW.
 *
 * +--------------------+
 * |overlay/manager_info|
 * +--------------------+
 *          v
 *        apply()
 *          v
 * +--------------------+
41
 * |       info         |
T
Tomi Valkeinen 已提交
42 43
 * +--------------------+
 *          v
44
 *      write_regs()
T
Tomi Valkeinen 已提交
45 46 47 48 49 50 51 52 53 54 55 56
 *          v
 * +--------------------+
 * |  shadow registers  |
 * +--------------------+
 *          v
 * VFP or lcd/digit_enable
 *          v
 * +--------------------+
 * |      registers     |
 * +--------------------+
 */

57
struct ovl_priv_data {
T
Tomi Valkeinen 已提交
58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75
	/* If true, cache changed, but not written to shadow registers. Set
	 * in apply(), cleared when registers written. */
	bool dirty;
	/* If true, shadow registers contain changed values not yet in real
	 * registers. Set when writing to shadow registers, cleared at
	 * VSYNC/EVSYNC */
	bool shadow_dirty;

	bool enabled;

	struct omap_overlay_info info;

	enum omap_channel channel;

	u32 fifo_low;
	u32 fifo_high;
};

76
struct mgr_priv_data {
T
Tomi Valkeinen 已提交
77 78 79 80 81 82 83 84 85 86 87 88 89 90 91
	/* If true, cache changed, but not written to shadow registers. Set
	 * in apply(), cleared when registers written. */
	bool dirty;
	/* If true, shadow registers contain changed values not yet in real
	 * registers. Set when writing to shadow registers, cleared at
	 * VSYNC/EVSYNC */
	bool shadow_dirty;

	struct omap_overlay_manager_info info;

	bool manual_update;
	bool do_manual_update;
};

static struct {
92
	struct ovl_priv_data ovl_priv_data_array[MAX_DSS_OVERLAYS];
93
	struct mgr_priv_data mgr_priv_data_array[MAX_DSS_MANAGERS];
T
Tomi Valkeinen 已提交
94 95

	bool irq_enabled;
96
} dss_data;
T
Tomi Valkeinen 已提交
97

98
/* protects dss_data */
99 100
static spinlock_t data_lock;

101 102
static struct ovl_priv_data *get_ovl_priv(struct omap_overlay *ovl)
{
103
	return &dss_data.ovl_priv_data_array[ovl->id];
104 105
}

106 107
static struct mgr_priv_data *get_mgr_priv(struct omap_overlay_manager *mgr)
{
108
	return &dss_data.mgr_priv_data_array[mgr->id];
109 110
}

T
Tomi Valkeinen 已提交
111 112
void dss_apply_init(void)
{
113
	spin_lock_init(&data_lock);
T
Tomi Valkeinen 已提交
114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133
}

static bool ovl_manual_update(struct omap_overlay *ovl)
{
	return ovl->manager->device->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE;
}

static bool mgr_manual_update(struct omap_overlay_manager *mgr)
{
	return mgr->device->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE;
}

static int overlay_enabled(struct omap_overlay *ovl)
{
	return ovl->info.enabled && ovl->manager && ovl->manager->device;
}

int dss_mgr_wait_for_go(struct omap_overlay_manager *mgr)
{
	unsigned long timeout = msecs_to_jiffies(500);
134
	struct mgr_priv_data *mp;
T
Tomi Valkeinen 已提交
135 136 137 138 139 140 141 142 143 144 145
	u32 irq;
	int r;
	int i;
	struct omap_dss_device *dssdev = mgr->device;

	if (!dssdev || dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
		return 0;

	if (mgr_manual_update(mgr))
		return 0;

146
	irq = dispc_mgr_get_vsync_irq(mgr->id);
T
Tomi Valkeinen 已提交
147

148
	mp = get_mgr_priv(mgr);
T
Tomi Valkeinen 已提交
149 150 151 152 153
	i = 0;
	while (1) {
		unsigned long flags;
		bool shadow_dirty, dirty;

154
		spin_lock_irqsave(&data_lock, flags);
155 156
		dirty = mp->dirty;
		shadow_dirty = mp->shadow_dirty;
157
		spin_unlock_irqrestore(&data_lock, flags);
T
Tomi Valkeinen 已提交
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

		if (!dirty && !shadow_dirty) {
			r = 0;
			break;
		}

		/* 4 iterations is the worst case:
		 * 1 - initial iteration, dirty = true (between VFP and VSYNC)
		 * 2 - first VSYNC, dirty = true
		 * 3 - dirty = false, shadow_dirty = true
		 * 4 - shadow_dirty = false */
		if (i++ == 3) {
			DSSERR("mgr(%d)->wait_for_go() not finishing\n",
					mgr->id);
			r = 0;
			break;
		}

		r = omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout);
		if (r == -ERESTARTSYS)
			break;

		if (r) {
			DSSERR("mgr(%d)->wait_for_go() timeout\n", mgr->id);
			break;
		}
	}

	return r;
}

int dss_mgr_wait_for_go_ovl(struct omap_overlay *ovl)
{
	unsigned long timeout = msecs_to_jiffies(500);
192
	struct ovl_priv_data *op;
T
Tomi Valkeinen 已提交
193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208
	struct omap_dss_device *dssdev;
	u32 irq;
	int r;
	int i;

	if (!ovl->manager)
		return 0;

	dssdev = ovl->manager->device;

	if (!dssdev || dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
		return 0;

	if (ovl_manual_update(ovl))
		return 0;

209
	irq = dispc_mgr_get_vsync_irq(ovl->manager->id);
T
Tomi Valkeinen 已提交
210

211
	op = get_ovl_priv(ovl);
T
Tomi Valkeinen 已提交
212 213 214 215 216
	i = 0;
	while (1) {
		unsigned long flags;
		bool shadow_dirty, dirty;

217
		spin_lock_irqsave(&data_lock, flags);
218 219
		dirty = op->dirty;
		shadow_dirty = op->shadow_dirty;
220
		spin_unlock_irqrestore(&data_lock, flags);
T
Tomi Valkeinen 已提交
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

		if (!dirty && !shadow_dirty) {
			r = 0;
			break;
		}

		/* 4 iterations is the worst case:
		 * 1 - initial iteration, dirty = true (between VFP and VSYNC)
		 * 2 - first VSYNC, dirty = true
		 * 3 - dirty = false, shadow_dirty = true
		 * 4 - shadow_dirty = false */
		if (i++ == 3) {
			DSSERR("ovl(%d)->wait_for_go() not finishing\n",
					ovl->id);
			r = 0;
			break;
		}

		r = omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout);
		if (r == -ERESTARTSYS)
			break;

		if (r) {
			DSSERR("ovl(%d)->wait_for_go() timeout\n", ovl->id);
			break;
		}
	}

	return r;
}

252
static int dss_ovl_write_regs(struct omap_overlay *ovl)
T
Tomi Valkeinen 已提交
253
{
254
	struct ovl_priv_data *op;
T
Tomi Valkeinen 已提交
255 256 257 258
	struct omap_overlay_info *oi;
	bool ilace, replication;
	int r;

259
	DSSDBGF("%d", ovl->id);
T
Tomi Valkeinen 已提交
260

261 262
	op = get_ovl_priv(ovl);
	oi = &op->info;
T
Tomi Valkeinen 已提交
263

264
	if (!op->enabled) {
265
		dispc_ovl_enable(ovl->id, 0);
T
Tomi Valkeinen 已提交
266 267 268 269 270 271 272
		return 0;
	}

	replication = dss_use_replication(ovl->manager->device, oi->color_mode);

	ilace = ovl->manager->device->type == OMAP_DISPLAY_TYPE_VENC;

273
	dispc_ovl_set_channel_out(ovl->id, op->channel);
T
Tomi Valkeinen 已提交
274

275
	r = dispc_ovl_setup(ovl->id, oi, ilace, replication);
T
Tomi Valkeinen 已提交
276 277
	if (r) {
		/* this shouldn't happen */
278 279
		DSSERR("dispc_ovl_setup failed for ovl %d\n", ovl->id);
		dispc_ovl_enable(ovl->id, 0);
T
Tomi Valkeinen 已提交
280 281 282
		return r;
	}

283
	dispc_ovl_set_fifo_threshold(ovl->id, op->fifo_low, op->fifo_high);
T
Tomi Valkeinen 已提交
284

285
	dispc_ovl_enable(ovl->id, 1);
T
Tomi Valkeinen 已提交
286 287 288 289

	return 0;
}

290
static void dss_mgr_write_regs(struct omap_overlay_manager *mgr)
T
Tomi Valkeinen 已提交
291
{
292
	struct mgr_priv_data *mp;
T
Tomi Valkeinen 已提交
293 294
	struct omap_overlay_manager_info *mi;

295
	DSSDBGF("%d", mgr->id);
T
Tomi Valkeinen 已提交
296

297 298
	mp = get_mgr_priv(mgr);
	mi = &mp->info;
T
Tomi Valkeinen 已提交
299

300
	dispc_mgr_setup(mgr->id, mi);
T
Tomi Valkeinen 已提交
301 302
}

303
/* dss_write_regs() tries to write values from cache to shadow registers.
T
Tomi Valkeinen 已提交
304 305 306
 * It writes only to those managers/overlays that are not busy.
 * returns 0 if everything could be written to shadow registers.
 * returns 1 if not everything could be written to shadow registers. */
307
static int dss_write_regs(void)
T
Tomi Valkeinen 已提交
308
{
309 310
	struct omap_overlay *ovl;
	struct omap_overlay_manager *mgr;
311
	struct ovl_priv_data *op;
312
	struct mgr_priv_data *mp;
T
Tomi Valkeinen 已提交
313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330
	const int num_ovls = dss_feat_get_num_ovls();
	const int num_mgrs = dss_feat_get_num_mgrs();
	int i;
	int r;
	bool mgr_busy[MAX_DSS_MANAGERS];
	bool mgr_go[MAX_DSS_MANAGERS];
	bool busy;

	r = 0;
	busy = false;

	for (i = 0; i < num_mgrs; i++) {
		mgr_busy[i] = dispc_mgr_go_busy(i);
		mgr_go[i] = false;
	}

	/* Commit overlay settings */
	for (i = 0; i < num_ovls; ++i) {
331
		ovl = omap_dss_get_overlay(i);
332
		op = get_ovl_priv(ovl);
T
Tomi Valkeinen 已提交
333

334
		if (!op->dirty)
T
Tomi Valkeinen 已提交
335 336
			continue;

337 338 339
		mp = get_mgr_priv(ovl->manager);

		if (mp->manual_update && !mp->do_manual_update)
T
Tomi Valkeinen 已提交
340 341
			continue;

342
		if (mgr_busy[op->channel]) {
T
Tomi Valkeinen 已提交
343 344 345 346
			busy = true;
			continue;
		}

347
		r = dss_ovl_write_regs(ovl);
T
Tomi Valkeinen 已提交
348
		if (r)
349
			DSSERR("dss_ovl_write_regs %d failed\n", i);
T
Tomi Valkeinen 已提交
350

351 352 353
		op->dirty = false;
		op->shadow_dirty = true;
		mgr_go[op->channel] = true;
T
Tomi Valkeinen 已提交
354 355 356 357
	}

	/* Commit manager settings */
	for (i = 0; i < num_mgrs; ++i) {
358
		mgr = omap_dss_get_overlay_manager(i);
359
		mp = get_mgr_priv(mgr);
T
Tomi Valkeinen 已提交
360

361
		if (!mp->dirty)
T
Tomi Valkeinen 已提交
362 363
			continue;

364
		if (mp->manual_update && !mp->do_manual_update)
T
Tomi Valkeinen 已提交
365 366 367 368 369 370 371
			continue;

		if (mgr_busy[i]) {
			busy = true;
			continue;
		}

372
		dss_mgr_write_regs(mgr);
373 374
		mp->dirty = false;
		mp->shadow_dirty = true;
T
Tomi Valkeinen 已提交
375 376 377 378 379
		mgr_go[i] = true;
	}

	/* set GO */
	for (i = 0; i < num_mgrs; ++i) {
380 381
		mgr = omap_dss_get_overlay_manager(i);
		mp = get_mgr_priv(mgr);
T
Tomi Valkeinen 已提交
382 383 384 385 386 387 388

		if (!mgr_go[i])
			continue;

		/* We don't need GO with manual update display. LCD iface will
		 * always be turned off after frame, and new settings will be
		 * taken in to use at next update */
389
		if (!mp->manual_update)
T
Tomi Valkeinen 已提交
390 391 392 393 394 395 396 397 398 399 400 401 402
			dispc_mgr_go(i);
	}

	if (busy)
		r = 1;
	else
		r = 0;

	return r;
}

void dss_mgr_start_update(struct omap_overlay_manager *mgr)
{
403
	struct mgr_priv_data *mp = get_mgr_priv(mgr);
404
	struct ovl_priv_data *op;
405
	struct omap_overlay *ovl;
T
Tomi Valkeinen 已提交
406

407
	mp->do_manual_update = true;
408
	dss_write_regs();
409
	mp->do_manual_update = false;
T
Tomi Valkeinen 已提交
410

411
	list_for_each_entry(ovl, &mgr->overlays, list) {
412 413
		op = get_ovl_priv(ovl);
		op->shadow_dirty = false;
T
Tomi Valkeinen 已提交
414 415
	}

416
	mp->shadow_dirty = false;
T
Tomi Valkeinen 已提交
417

418
	dispc_mgr_enable(mgr->id, true);
T
Tomi Valkeinen 已提交
419 420
}

421 422 423 424
static void dss_apply_irq_handler(void *data, u32 mask);

static void dss_register_vsync_isr(void)
{
425
	const int num_mgrs = dss_feat_get_num_mgrs();
426
	u32 mask;
427
	int r, i;
428

429 430 431
	mask = 0;
	for (i = 0; i < num_mgrs; ++i)
		mask |= dispc_mgr_get_vsync_irq(i);
432 433 434 435

	r = omap_dispc_register_isr(dss_apply_irq_handler, NULL, mask);
	WARN_ON(r);

436
	dss_data.irq_enabled = true;
437 438 439 440
}

static void dss_unregister_vsync_isr(void)
{
441
	const int num_mgrs = dss_feat_get_num_mgrs();
442
	u32 mask;
443
	int r, i;
444

445 446 447
	mask = 0;
	for (i = 0; i < num_mgrs; ++i)
		mask |= dispc_mgr_get_vsync_irq(i);
448 449 450 451

	r = omap_dispc_unregister_isr(dss_apply_irq_handler, NULL, mask);
	WARN_ON(r);

452
	dss_data.irq_enabled = false;
453 454
}

T
Tomi Valkeinen 已提交
455 456
static void dss_apply_irq_handler(void *data, u32 mask)
{
457
	struct omap_overlay *ovl;
458 459
	struct omap_overlay_manager *mgr;
	struct mgr_priv_data *mp;
460
	struct ovl_priv_data *op;
T
Tomi Valkeinen 已提交
461 462 463 464 465 466 467 468
	const int num_ovls = dss_feat_get_num_ovls();
	const int num_mgrs = dss_feat_get_num_mgrs();
	int i, r;
	bool mgr_busy[MAX_DSS_MANAGERS];

	for (i = 0; i < num_mgrs; i++)
		mgr_busy[i] = dispc_mgr_go_busy(i);

469
	spin_lock(&data_lock);
T
Tomi Valkeinen 已提交
470 471

	for (i = 0; i < num_ovls; ++i) {
472 473 474 475
		ovl = omap_dss_get_overlay(i);
		op = get_ovl_priv(ovl);
		if (!mgr_busy[op->channel])
			op->shadow_dirty = false;
T
Tomi Valkeinen 已提交
476 477 478
	}

	for (i = 0; i < num_mgrs; ++i) {
479 480
		mgr = omap_dss_get_overlay_manager(i);
		mp = get_mgr_priv(mgr);
T
Tomi Valkeinen 已提交
481
		if (!mgr_busy[i])
482
			mp->shadow_dirty = false;
T
Tomi Valkeinen 已提交
483 484
	}

485
	r = dss_write_regs();
T
Tomi Valkeinen 已提交
486 487 488 489 490 491 492 493 494 495 496 497 498 499
	if (r == 1)
		goto end;

	/* re-read busy flags */
	for (i = 0; i < num_mgrs; i++)
		mgr_busy[i] = dispc_mgr_go_busy(i);

	/* keep running as long as there are busy managers, so that
	 * we can collect overlay-applied information */
	for (i = 0; i < num_mgrs; ++i) {
		if (mgr_busy[i])
			goto end;
	}

500
	dss_unregister_vsync_isr();
T
Tomi Valkeinen 已提交
501 502

end:
503
	spin_unlock(&data_lock);
T
Tomi Valkeinen 已提交
504 505 506 507
}

static int omap_dss_mgr_apply_ovl(struct omap_overlay *ovl)
{
508
	struct ovl_priv_data *op;
T
Tomi Valkeinen 已提交
509 510
	struct omap_dss_device *dssdev;

511
	op = get_ovl_priv(ovl);
T
Tomi Valkeinen 已提交
512 513 514 515 516 517 518

	if (ovl->manager_changed) {
		ovl->manager_changed = false;
		ovl->info_dirty  = true;
	}

	if (!overlay_enabled(ovl)) {
519 520 521
		if (op->enabled) {
			op->enabled = false;
			op->dirty = true;
T
Tomi Valkeinen 已提交
522 523 524 525 526 527 528 529 530 531
		}
		return 0;
	}

	if (!ovl->info_dirty)
		return 0;

	dssdev = ovl->manager->device;

	if (dss_check_overlay(ovl, dssdev)) {
532 533 534
		if (op->enabled) {
			op->enabled = false;
			op->dirty = true;
T
Tomi Valkeinen 已提交
535 536 537 538 539
		}
		return -EINVAL;
	}

	ovl->info_dirty = false;
540 541
	op->dirty = true;
	op->info = ovl->info;
T
Tomi Valkeinen 已提交
542

543
	op->channel = ovl->manager->id;
T
Tomi Valkeinen 已提交
544

545
	op->enabled = true;
T
Tomi Valkeinen 已提交
546 547 548 549 550 551

	return 0;
}

static void omap_dss_mgr_apply_mgr(struct omap_overlay_manager *mgr)
{
552
	struct mgr_priv_data *mp;
T
Tomi Valkeinen 已提交
553

554
	mp = get_mgr_priv(mgr);
T
Tomi Valkeinen 已提交
555 556 557 558 559 560 561 562 563 564 565 566 567

	if (mgr->device_changed) {
		mgr->device_changed = false;
		mgr->info_dirty  = true;
	}

	if (!mgr->info_dirty)
		return;

	if (!mgr->device)
		return;

	mgr->info_dirty = false;
568 569
	mp->dirty = true;
	mp->info = mgr->info;
T
Tomi Valkeinen 已提交
570

571
	mp->manual_update = mgr_manual_update(mgr);
T
Tomi Valkeinen 已提交
572 573 574 575
}

static void omap_dss_mgr_apply_ovl_fifos(struct omap_overlay *ovl)
{
576
	struct ovl_priv_data *op;
T
Tomi Valkeinen 已提交
577 578 579
	struct omap_dss_device *dssdev;
	u32 size, burst_size;

580
	op = get_ovl_priv(ovl);
T
Tomi Valkeinen 已提交
581

582
	if (!op->enabled)
T
Tomi Valkeinen 已提交
583 584 585 586 587 588 589 590 591 592 593 594 595 596 597
		return;

	dssdev = ovl->manager->device;

	size = dispc_ovl_get_fifo_size(ovl->id);

	burst_size = dispc_ovl_get_burst_size(ovl->id);

	switch (dssdev->type) {
	case OMAP_DISPLAY_TYPE_DPI:
	case OMAP_DISPLAY_TYPE_DBI:
	case OMAP_DISPLAY_TYPE_SDI:
	case OMAP_DISPLAY_TYPE_VENC:
	case OMAP_DISPLAY_TYPE_HDMI:
		default_get_overlay_fifo_thresholds(ovl->id, size,
598 599
				burst_size, &op->fifo_low,
				&op->fifo_high);
T
Tomi Valkeinen 已提交
600 601 602 603
		break;
#ifdef CONFIG_OMAP2_DSS_DSI
	case OMAP_DISPLAY_TYPE_DSI:
		dsi_get_overlay_fifo_thresholds(ovl->id, size,
604 605
				burst_size, &op->fifo_low,
				&op->fifo_high);
T
Tomi Valkeinen 已提交
606 607 608 609 610 611 612 613 614
		break;
#endif
	default:
		BUG();
	}
}

int omap_dss_mgr_apply(struct omap_overlay_manager *mgr)
{
615
	int r;
T
Tomi Valkeinen 已提交
616
	unsigned long flags;
617
	struct omap_overlay *ovl;
T
Tomi Valkeinen 已提交
618 619 620 621 622 623 624

	DSSDBG("omap_dss_mgr_apply(%s)\n", mgr->name);

	r = dispc_runtime_get();
	if (r)
		return r;

625
	spin_lock_irqsave(&data_lock, flags);
T
Tomi Valkeinen 已提交
626 627

	/* Configure overlays */
628
	list_for_each_entry(ovl, &mgr->overlays, list)
T
Tomi Valkeinen 已提交
629 630 631 632 633 634
		omap_dss_mgr_apply_ovl(ovl);

	/* Configure manager */
	omap_dss_mgr_apply_mgr(mgr);

	/* Configure overlay fifos */
635
	list_for_each_entry(ovl, &mgr->overlays, list)
T
Tomi Valkeinen 已提交
636 637 638
		omap_dss_mgr_apply_ovl_fifos(ovl);

	r = 0;
639
	if (mgr->enabled && !mgr_manual_update(mgr)) {
640
		if (!dss_data.irq_enabled)
641
			dss_register_vsync_isr();
T
Tomi Valkeinen 已提交
642

643
		dss_write_regs();
644
	}
T
Tomi Valkeinen 已提交
645

646
	spin_unlock_irqrestore(&data_lock, flags);
T
Tomi Valkeinen 已提交
647 648 649 650 651 652

	dispc_runtime_put();

	return r;
}

653 654 655
void dss_mgr_enable(struct omap_overlay_manager *mgr)
{
	dispc_mgr_enable(mgr->id, true);
656
	mgr->enabled = true;
657 658 659 660 661
}

void dss_mgr_disable(struct omap_overlay_manager *mgr)
{
	dispc_mgr_enable(mgr->id, false);
662
	mgr->enabled = false;
663 664
}

665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747
int dss_mgr_set_info(struct omap_overlay_manager *mgr,
		struct omap_overlay_manager_info *info)
{
	int r;
	struct omap_overlay_manager_info old_info;

	old_info = mgr->info;
	mgr->info = *info;

	r = dss_check_manager(mgr);
	if (r) {
		mgr->info = old_info;
		return r;
	}

	mgr->info_dirty = true;

	return 0;
}

void dss_mgr_get_info(struct omap_overlay_manager *mgr,
		struct omap_overlay_manager_info *info)
{
	*info = mgr->info;
}

int dss_mgr_set_device(struct omap_overlay_manager *mgr,
		struct omap_dss_device *dssdev)
{
	int r;
	struct omap_overlay *ovl;

	if (dssdev->manager) {
		DSSERR("display '%s' already has a manager '%s'\n",
			       dssdev->name, dssdev->manager->name);
		return -EINVAL;
	}

	if ((mgr->supported_displays & dssdev->type) == 0) {
		DSSERR("display '%s' does not support manager '%s'\n",
			       dssdev->name, mgr->name);
		return -EINVAL;
	}

	list_for_each_entry(ovl, &mgr->overlays, list) {
		if (!ovl->info.enabled)
			continue;

		r = dss_check_overlay(ovl, dssdev);
		if (r)
			return r;
	}

	dssdev->manager = mgr;
	mgr->device = dssdev;
	mgr->device_changed = true;

	return 0;
}

int dss_mgr_unset_device(struct omap_overlay_manager *mgr)
{
	if (!mgr->device) {
		DSSERR("failed to unset display, display not set.\n");
		return -EINVAL;
	}

	/*
	 * Don't allow currently enabled displays to have the overlay manager
	 * pulled out from underneath them
	 */
	if (mgr->device->state != OMAP_DSS_DISPLAY_DISABLED)
		return -EINVAL;

	mgr->device->manager = NULL;
	mgr->device = NULL;
	mgr->device_changed = true;

	return 0;
}



748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831
int dss_ovl_set_info(struct omap_overlay *ovl,
		struct omap_overlay_info *info)
{
	int r;
	struct omap_overlay_info old_info;

	old_info = ovl->info;
	ovl->info = *info;

	if (ovl->manager) {
		r = dss_check_overlay(ovl, ovl->manager->device);
		if (r) {
			ovl->info = old_info;
			return r;
		}
	}

	ovl->info_dirty = true;

	return 0;
}

void dss_ovl_get_info(struct omap_overlay *ovl,
		struct omap_overlay_info *info)
{
	*info = ovl->info;
}

int dss_ovl_set_manager(struct omap_overlay *ovl,
		struct omap_overlay_manager *mgr)
{
	if (!mgr)
		return -EINVAL;

	if (ovl->manager) {
		DSSERR("overlay '%s' already has a manager '%s'\n",
				ovl->name, ovl->manager->name);
		return -EINVAL;
	}

	if (ovl->info.enabled) {
		DSSERR("overlay has to be disabled to change the manager\n");
		return -EINVAL;
	}

	ovl->manager = mgr;
	list_add_tail(&ovl->list, &mgr->overlays);
	ovl->manager_changed = true;

	/* XXX: When there is an overlay on a DSI manual update display, and
	 * the overlay is first disabled, then moved to tv, and enabled, we
	 * seem to get SYNC_LOST_DIGIT error.
	 *
	 * Waiting doesn't seem to help, but updating the manual update display
	 * after disabling the overlay seems to fix this. This hints that the
	 * overlay is perhaps somehow tied to the LCD output until the output
	 * is updated.
	 *
	 * Userspace workaround for this is to update the LCD after disabling
	 * the overlay, but before moving the overlay to TV.
	 */

	return 0;
}

int dss_ovl_unset_manager(struct omap_overlay *ovl)
{
	if (!ovl->manager) {
		DSSERR("failed to detach overlay: manager not set\n");
		return -EINVAL;
	}

	if (ovl->info.enabled) {
		DSSERR("overlay has to be disabled to unset the manager\n");
		return -EINVAL;
	}

	ovl->manager = NULL;
	list_del(&ovl->list);
	ovl->manager_changed = true;

	return 0;
}