dpu_hw_ctl.c 12.2 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only 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.
 */

#include <linux/delay.h>
#include "dpu_hwio.h"
#include "dpu_hw_ctl.h"
#include "dpu_dbg.h"
#include "dpu_kms.h"
18
#include "dpu_trace.h"
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

#define   CTL_LAYER(lm)                 \
	(((lm) == LM_5) ? (0x024) : (((lm) - LM_0) * 0x004))
#define   CTL_LAYER_EXT(lm)             \
	(0x40 + (((lm) - LM_0) * 0x004))
#define   CTL_LAYER_EXT2(lm)             \
	(0x70 + (((lm) - LM_0) * 0x004))
#define   CTL_LAYER_EXT3(lm)             \
	(0xA0 + (((lm) - LM_0) * 0x004))
#define   CTL_TOP                       0x014
#define   CTL_FLUSH                     0x018
#define   CTL_START                     0x01C
#define   CTL_PREPARE                   0x0d0
#define   CTL_SW_RESET                  0x030
#define   CTL_LAYER_EXTN_OFFSET         0x40

#define CTL_MIXER_BORDER_OUT            BIT(24)
#define CTL_FLUSH_MASK_CTL              BIT(17)

#define DPU_REG_RESET_TIMEOUT_US        2000

static struct dpu_ctl_cfg *_ctl_offset(enum dpu_ctl ctl,
		struct dpu_mdss_cfg *m,
		void __iomem *addr,
		struct dpu_hw_blk_reg_map *b)
{
	int i;

	for (i = 0; i < m->ctl_count; i++) {
		if (ctl == m->ctl[i].id) {
			b->base_off = addr;
			b->blk_off = m->ctl[i].base;
			b->length = m->ctl[i].len;
			b->hwversion = m->hwversion;
			b->log_mask = DPU_DBG_MASK_CTL;
			return &m->ctl[i];
		}
	}
	return ERR_PTR(-ENOMEM);
}

static int _mixer_stages(const struct dpu_lm_cfg *mixer, int count,
		enum dpu_lm lm)
{
	int i;
	int stages = -EINVAL;

	for (i = 0; i < count; i++) {
		if (lm == mixer[i].id) {
			stages = mixer[i].sblk->maxblendstages;
			break;
		}
	}

	return stages;
}

76 77 78 79 80 81 82
static inline u32 dpu_hw_ctl_get_flush_register(struct dpu_hw_ctl *ctx)
{
	struct dpu_hw_blk_reg_map *c = &ctx->hw;

	return DPU_REG_READ(c, CTL_FLUSH);
}

83 84
static inline void dpu_hw_ctl_trigger_start(struct dpu_hw_ctl *ctx)
{
85 86
	trace_dpu_hw_ctl_trigger_start(ctx->pending_flush_mask,
				       dpu_hw_ctl_get_flush_register(ctx));
87 88 89 90 91
	DPU_REG_WRITE(&ctx->hw, CTL_START, 0x1);
}

static inline void dpu_hw_ctl_trigger_pending(struct dpu_hw_ctl *ctx)
{
92 93
	trace_dpu_hw_ctl_trigger_prepare(ctx->pending_flush_mask,
					 dpu_hw_ctl_get_flush_register(ctx));
94 95 96 97 98
	DPU_REG_WRITE(&ctx->hw, CTL_PREPARE, 0x1);
}

static inline void dpu_hw_ctl_clear_pending_flush(struct dpu_hw_ctl *ctx)
{
99 100
	trace_dpu_hw_ctl_clear_pending_flush(ctx->pending_flush_mask,
				     dpu_hw_ctl_get_flush_register(ctx));
101 102 103 104 105 106
	ctx->pending_flush_mask = 0x0;
}

static inline void dpu_hw_ctl_update_pending_flush(struct dpu_hw_ctl *ctx,
		u32 flushbits)
{
107 108
	trace_dpu_hw_ctl_update_pending_flush(flushbits,
					      ctx->pending_flush_mask);
109 110 111 112 113 114 115 116 117 118 119 120 121
	ctx->pending_flush_mask |= flushbits;
}

static u32 dpu_hw_ctl_get_pending_flush(struct dpu_hw_ctl *ctx)
{
	if (!ctx)
		return 0x0;

	return ctx->pending_flush_mask;
}

static inline void dpu_hw_ctl_trigger_flush(struct dpu_hw_ctl *ctx)
{
122 123
	trace_dpu_hw_ctl_trigger_pending_flush(ctx->pending_flush_mask,
				     dpu_hw_ctl_get_flush_register(ctx));
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
	DPU_REG_WRITE(&ctx->hw, CTL_FLUSH, ctx->pending_flush_mask);
}

static inline uint32_t dpu_hw_ctl_get_bitmask_sspp(struct dpu_hw_ctl *ctx,
	enum dpu_sspp sspp)
{
	uint32_t flushbits = 0;

	switch (sspp) {
	case SSPP_VIG0:
		flushbits =  BIT(0);
		break;
	case SSPP_VIG1:
		flushbits = BIT(1);
		break;
	case SSPP_VIG2:
		flushbits = BIT(2);
		break;
	case SSPP_VIG3:
		flushbits = BIT(18);
		break;
	case SSPP_RGB0:
		flushbits = BIT(3);
		break;
	case SSPP_RGB1:
		flushbits = BIT(4);
		break;
	case SSPP_RGB2:
		flushbits = BIT(5);
		break;
	case SSPP_RGB3:
		flushbits = BIT(19);
		break;
	case SSPP_DMA0:
		flushbits = BIT(11);
		break;
	case SSPP_DMA1:
		flushbits = BIT(12);
		break;
	case SSPP_DMA2:
		flushbits = BIT(24);
		break;
	case SSPP_DMA3:
		flushbits = BIT(25);
		break;
	case SSPP_CURSOR0:
		flushbits = BIT(22);
		break;
	case SSPP_CURSOR1:
		flushbits = BIT(23);
		break;
	default:
		break;
	}

	return flushbits;
}

static inline uint32_t dpu_hw_ctl_get_bitmask_mixer(struct dpu_hw_ctl *ctx,
	enum dpu_lm lm)
{
	uint32_t flushbits = 0;

	switch (lm) {
	case LM_0:
		flushbits = BIT(6);
		break;
	case LM_1:
		flushbits = BIT(7);
		break;
	case LM_2:
		flushbits = BIT(8);
		break;
	case LM_3:
		flushbits = BIT(9);
		break;
	case LM_4:
		flushbits = BIT(10);
		break;
	case LM_5:
		flushbits = BIT(20);
		break;
	default:
		return -EINVAL;
	}

	flushbits |= CTL_FLUSH_MASK_CTL;

	return flushbits;
}

static inline int dpu_hw_ctl_get_bitmask_intf(struct dpu_hw_ctl *ctx,
		u32 *flushbits, enum dpu_intf intf)
{
	switch (intf) {
	case INTF_0:
		*flushbits |= BIT(31);
		break;
	case INTF_1:
		*flushbits |= BIT(30);
		break;
	case INTF_2:
		*flushbits |= BIT(29);
		break;
	case INTF_3:
		*flushbits |= BIT(28);
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static u32 dpu_hw_ctl_poll_reset_status(struct dpu_hw_ctl *ctx, u32 timeout_us)
{
	struct dpu_hw_blk_reg_map *c = &ctx->hw;
	ktime_t timeout;
	u32 status;

	timeout = ktime_add_us(ktime_get(), timeout_us);

	/*
	 * it takes around 30us to have mdp finish resetting its ctl path
	 * poll every 50us so that reset should be completed at 1st poll
	 */
	do {
		status = DPU_REG_READ(c, CTL_SW_RESET);
		status &= 0x1;
		if (status)
			usleep_range(20, 50);
	} while (status && ktime_compare_safe(ktime_get(), timeout) < 0);

	return status;
}

static int dpu_hw_ctl_reset_control(struct dpu_hw_ctl *ctx)
{
	struct dpu_hw_blk_reg_map *c = &ctx->hw;

	pr_debug("issuing hw ctl reset for ctl:%d\n", ctx->idx);
	DPU_REG_WRITE(c, CTL_SW_RESET, 0x1);
	if (dpu_hw_ctl_poll_reset_status(ctx, DPU_REG_RESET_TIMEOUT_US))
		return -EINVAL;

	return 0;
}

static int dpu_hw_ctl_wait_reset_status(struct dpu_hw_ctl *ctx)
{
	struct dpu_hw_blk_reg_map *c = &ctx->hw;
	u32 status;

	status = DPU_REG_READ(c, CTL_SW_RESET);
	status &= 0x01;
	if (!status)
		return 0;

	pr_debug("hw ctl reset is set for ctl:%d\n", ctx->idx);
	if (dpu_hw_ctl_poll_reset_status(ctx, DPU_REG_RESET_TIMEOUT_US)) {
		pr_err("hw recovery is not complete for ctl:%d\n", ctx->idx);
		return -EINVAL;
	}

	return 0;
}

static void dpu_hw_ctl_clear_all_blendstages(struct dpu_hw_ctl *ctx)
{
	struct dpu_hw_blk_reg_map *c = &ctx->hw;
	int i;

	for (i = 0; i < ctx->mixer_count; i++) {
		DPU_REG_WRITE(c, CTL_LAYER(LM_0 + i), 0);
		DPU_REG_WRITE(c, CTL_LAYER_EXT(LM_0 + i), 0);
		DPU_REG_WRITE(c, CTL_LAYER_EXT2(LM_0 + i), 0);
		DPU_REG_WRITE(c, CTL_LAYER_EXT3(LM_0 + i), 0);
	}
}

static void dpu_hw_ctl_setup_blendstage(struct dpu_hw_ctl *ctx,
	enum dpu_lm lm, struct dpu_hw_stage_cfg *stage_cfg)
{
	struct dpu_hw_blk_reg_map *c = &ctx->hw;
	u32 mixercfg = 0, mixercfg_ext = 0, mix, ext;
	u32 mixercfg_ext2 = 0, mixercfg_ext3 = 0;
	int i, j;
310
	int stages;
311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536
	int pipes_per_stage;

	stages = _mixer_stages(ctx->mixer_hw_caps, ctx->mixer_count, lm);
	if (stages < 0)
		return;

	if (test_bit(DPU_MIXER_SOURCESPLIT,
		&ctx->mixer_hw_caps->features))
		pipes_per_stage = PIPES_PER_STAGE;
	else
		pipes_per_stage = 1;

	mixercfg = CTL_MIXER_BORDER_OUT; /* always set BORDER_OUT */

	if (!stage_cfg)
		goto exit;

	for (i = 0; i <= stages; i++) {
		/* overflow to ext register if 'i + 1 > 7' */
		mix = (i + 1) & 0x7;
		ext = i >= 7;

		for (j = 0 ; j < pipes_per_stage; j++) {
			enum dpu_sspp_multirect_index rect_index =
				stage_cfg->multirect_index[i][j];

			switch (stage_cfg->stage[i][j]) {
			case SSPP_VIG0:
				if (rect_index == DPU_SSPP_RECT_1) {
					mixercfg_ext3 |= ((i + 1) & 0xF) << 0;
				} else {
					mixercfg |= mix << 0;
					mixercfg_ext |= ext << 0;
				}
				break;
			case SSPP_VIG1:
				if (rect_index == DPU_SSPP_RECT_1) {
					mixercfg_ext3 |= ((i + 1) & 0xF) << 4;
				} else {
					mixercfg |= mix << 3;
					mixercfg_ext |= ext << 2;
				}
				break;
			case SSPP_VIG2:
				if (rect_index == DPU_SSPP_RECT_1) {
					mixercfg_ext3 |= ((i + 1) & 0xF) << 8;
				} else {
					mixercfg |= mix << 6;
					mixercfg_ext |= ext << 4;
				}
				break;
			case SSPP_VIG3:
				if (rect_index == DPU_SSPP_RECT_1) {
					mixercfg_ext3 |= ((i + 1) & 0xF) << 12;
				} else {
					mixercfg |= mix << 26;
					mixercfg_ext |= ext << 6;
				}
				break;
			case SSPP_RGB0:
				mixercfg |= mix << 9;
				mixercfg_ext |= ext << 8;
				break;
			case SSPP_RGB1:
				mixercfg |= mix << 12;
				mixercfg_ext |= ext << 10;
				break;
			case SSPP_RGB2:
				mixercfg |= mix << 15;
				mixercfg_ext |= ext << 12;
				break;
			case SSPP_RGB3:
				mixercfg |= mix << 29;
				mixercfg_ext |= ext << 14;
				break;
			case SSPP_DMA0:
				if (rect_index == DPU_SSPP_RECT_1) {
					mixercfg_ext2 |= ((i + 1) & 0xF) << 8;
				} else {
					mixercfg |= mix << 18;
					mixercfg_ext |= ext << 16;
				}
				break;
			case SSPP_DMA1:
				if (rect_index == DPU_SSPP_RECT_1) {
					mixercfg_ext2 |= ((i + 1) & 0xF) << 12;
				} else {
					mixercfg |= mix << 21;
					mixercfg_ext |= ext << 18;
				}
				break;
			case SSPP_DMA2:
				if (rect_index == DPU_SSPP_RECT_1) {
					mixercfg_ext2 |= ((i + 1) & 0xF) << 16;
				} else {
					mix |= (i + 1) & 0xF;
					mixercfg_ext2 |= mix << 0;
				}
				break;
			case SSPP_DMA3:
				if (rect_index == DPU_SSPP_RECT_1) {
					mixercfg_ext2 |= ((i + 1) & 0xF) << 20;
				} else {
					mix |= (i + 1) & 0xF;
					mixercfg_ext2 |= mix << 4;
				}
				break;
			case SSPP_CURSOR0:
				mixercfg_ext |= ((i + 1) & 0xF) << 20;
				break;
			case SSPP_CURSOR1:
				mixercfg_ext |= ((i + 1) & 0xF) << 26;
				break;
			default:
				break;
			}
		}
	}

exit:
	DPU_REG_WRITE(c, CTL_LAYER(lm), mixercfg);
	DPU_REG_WRITE(c, CTL_LAYER_EXT(lm), mixercfg_ext);
	DPU_REG_WRITE(c, CTL_LAYER_EXT2(lm), mixercfg_ext2);
	DPU_REG_WRITE(c, CTL_LAYER_EXT3(lm), mixercfg_ext3);
}

static void dpu_hw_ctl_intf_cfg(struct dpu_hw_ctl *ctx,
		struct dpu_hw_intf_cfg *cfg)
{
	struct dpu_hw_blk_reg_map *c = &ctx->hw;
	u32 intf_cfg = 0;

	intf_cfg |= (cfg->intf & 0xF) << 4;

	if (cfg->mode_3d) {
		intf_cfg |= BIT(19);
		intf_cfg |= (cfg->mode_3d - 0x1) << 20;
	}

	switch (cfg->intf_mode_sel) {
	case DPU_CTL_MODE_SEL_VID:
		intf_cfg &= ~BIT(17);
		intf_cfg &= ~(0x3 << 15);
		break;
	case DPU_CTL_MODE_SEL_CMD:
		intf_cfg |= BIT(17);
		intf_cfg |= ((cfg->stream_sel & 0x3) << 15);
		break;
	default:
		pr_err("unknown interface type %d\n", cfg->intf_mode_sel);
		return;
	}

	DPU_REG_WRITE(c, CTL_TOP, intf_cfg);
}

static void _setup_ctl_ops(struct dpu_hw_ctl_ops *ops,
		unsigned long cap)
{
	ops->clear_pending_flush = dpu_hw_ctl_clear_pending_flush;
	ops->update_pending_flush = dpu_hw_ctl_update_pending_flush;
	ops->get_pending_flush = dpu_hw_ctl_get_pending_flush;
	ops->trigger_flush = dpu_hw_ctl_trigger_flush;
	ops->get_flush_register = dpu_hw_ctl_get_flush_register;
	ops->trigger_start = dpu_hw_ctl_trigger_start;
	ops->trigger_pending = dpu_hw_ctl_trigger_pending;
	ops->setup_intf_cfg = dpu_hw_ctl_intf_cfg;
	ops->reset = dpu_hw_ctl_reset_control;
	ops->wait_reset_status = dpu_hw_ctl_wait_reset_status;
	ops->clear_all_blendstages = dpu_hw_ctl_clear_all_blendstages;
	ops->setup_blendstage = dpu_hw_ctl_setup_blendstage;
	ops->get_bitmask_sspp = dpu_hw_ctl_get_bitmask_sspp;
	ops->get_bitmask_mixer = dpu_hw_ctl_get_bitmask_mixer;
	ops->get_bitmask_intf = dpu_hw_ctl_get_bitmask_intf;
};

static struct dpu_hw_blk_ops dpu_hw_ops = {
	.start = NULL,
	.stop = NULL,
};

struct dpu_hw_ctl *dpu_hw_ctl_init(enum dpu_ctl idx,
		void __iomem *addr,
		struct dpu_mdss_cfg *m)
{
	struct dpu_hw_ctl *c;
	struct dpu_ctl_cfg *cfg;
	int rc;

	c = kzalloc(sizeof(*c), GFP_KERNEL);
	if (!c)
		return ERR_PTR(-ENOMEM);

	cfg = _ctl_offset(idx, m, addr, &c->hw);
	if (IS_ERR_OR_NULL(cfg)) {
		kfree(c);
		pr_err("failed to create dpu_hw_ctl %d\n", idx);
		return ERR_PTR(-EINVAL);
	}

	c->caps = cfg;
	_setup_ctl_ops(&c->ops, c->caps->features);
	c->idx = idx;
	c->mixer_count = m->mixer_count;
	c->mixer_hw_caps = m->mixer;

	rc = dpu_hw_blk_init(&c->base, DPU_HW_BLK_CTL, idx, &dpu_hw_ops);
	if (rc) {
		DPU_ERROR("failed to init hw blk %d\n", rc);
		goto blk_init_error;
	}

	return c;

blk_init_error:
	kzfree(c);

	return ERR_PTR(rc);
}

void dpu_hw_ctl_destroy(struct dpu_hw_ctl *ctx)
{
	if (ctx)
		dpu_hw_blk_destroy(&ctx->base);
	kfree(ctx);
}