summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/msm/msm_mdss.c
blob: 798bd4f3b66215faf3f5febe04c1a6901cafc992 (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
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
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
/*
 * SPDX-License-Identifier: GPL-2.0
 * Copyright (c) 2018, The Linux Foundation
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/interconnect.h>
#include <linux/irq.h>
#include <linux/irqchip.h>
#include <linux/irqdesc.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>

#include "msm_drv.h"
#include "msm_kms.h"

#define HW_REV				0x0
#define HW_INTR_STATUS			0x0010

#define UBWC_DEC_HW_VERSION		0x58
#define UBWC_STATIC			0x144
#define UBWC_CTRL_2			0x150
#define UBWC_PREDICTION_MODE		0x154

#define MIN_IB_BW	400000000UL /* Min ib vote 400MB */

struct msm_mdss_data {
	u32 ubwc_version;
	/* can be read from register 0x58 */
	u32 ubwc_dec_version;
	u32 ubwc_swizzle;
	u32 ubwc_static;
	u32 highest_bank_bit;
	u32 macrotile_mode;
};

struct msm_mdss {
	struct device *dev;

	void __iomem *mmio;
	struct clk_bulk_data *clocks;
	size_t num_clocks;
	bool is_mdp5;
	struct {
		unsigned long enabled_mask;
		struct irq_domain *domain;
	} irq_controller;
	const struct msm_mdss_data *mdss_data;
	struct icc_path *path[2];
	u32 num_paths;
};

static int msm_mdss_parse_data_bus_icc_path(struct device *dev,
					    struct msm_mdss *msm_mdss)
{
	struct icc_path *path0;
	struct icc_path *path1;

	path0 = of_icc_get(dev, "mdp0-mem");
	if (IS_ERR_OR_NULL(path0))
		return PTR_ERR_OR_ZERO(path0);

	msm_mdss->path[0] = path0;
	msm_mdss->num_paths = 1;

	path1 = of_icc_get(dev, "mdp1-mem");
	if (!IS_ERR_OR_NULL(path1)) {
		msm_mdss->path[1] = path1;
		msm_mdss->num_paths++;
	}

	return 0;
}

static void msm_mdss_put_icc_path(void *data)
{
	struct msm_mdss *msm_mdss = data;
	int i;

	for (i = 0; i < msm_mdss->num_paths; i++)
		icc_put(msm_mdss->path[i]);
}

static void msm_mdss_icc_request_bw(struct msm_mdss *msm_mdss, unsigned long bw)
{
	int i;

	for (i = 0; i < msm_mdss->num_paths; i++)
		icc_set_bw(msm_mdss->path[i], 0, Bps_to_icc(bw));
}

static void msm_mdss_irq(struct irq_desc *desc)
{
	struct msm_mdss *msm_mdss = irq_desc_get_handler_data(desc);
	struct irq_chip *chip = irq_desc_get_chip(desc);
	u32 interrupts;

	chained_irq_enter(chip, desc);

	interrupts = readl_relaxed(msm_mdss->mmio + HW_INTR_STATUS);

	while (interrupts) {
		irq_hw_number_t hwirq = fls(interrupts) - 1;
		int rc;

		rc = generic_handle_domain_irq(msm_mdss->irq_controller.domain,
					       hwirq);
		if (rc < 0) {
			dev_err(msm_mdss->dev, "handle irq fail: irq=%lu rc=%d\n",
				  hwirq, rc);
			break;
		}

		interrupts &= ~(1 << hwirq);
	}

	chained_irq_exit(chip, desc);
}

static void msm_mdss_irq_mask(struct irq_data *irqd)
{
	struct msm_mdss *msm_mdss = irq_data_get_irq_chip_data(irqd);

	/* memory barrier */
	smp_mb__before_atomic();
	clear_bit(irqd->hwirq, &msm_mdss->irq_controller.enabled_mask);
	/* memory barrier */
	smp_mb__after_atomic();
}

static void msm_mdss_irq_unmask(struct irq_data *irqd)
{
	struct msm_mdss *msm_mdss = irq_data_get_irq_chip_data(irqd);

	/* memory barrier */
	smp_mb__before_atomic();
	set_bit(irqd->hwirq, &msm_mdss->irq_controller.enabled_mask);
	/* memory barrier */
	smp_mb__after_atomic();
}

static struct irq_chip msm_mdss_irq_chip = {
	.name = "msm_mdss",
	.irq_mask = msm_mdss_irq_mask,
	.irq_unmask = msm_mdss_irq_unmask,
};

static struct lock_class_key msm_mdss_lock_key, msm_mdss_request_key;

static int msm_mdss_irqdomain_map(struct irq_domain *domain,
		unsigned int irq, irq_hw_number_t hwirq)
{
	struct msm_mdss *msm_mdss = domain->host_data;

	irq_set_lockdep_class(irq, &msm_mdss_lock_key, &msm_mdss_request_key);
	irq_set_chip_and_handler(irq, &msm_mdss_irq_chip, handle_level_irq);

	return irq_set_chip_data(irq, msm_mdss);
}

static const struct irq_domain_ops msm_mdss_irqdomain_ops = {
	.map = msm_mdss_irqdomain_map,
	.xlate = irq_domain_xlate_onecell,
};

static int _msm_mdss_irq_domain_add(struct msm_mdss *msm_mdss)
{
	struct device *dev;
	struct irq_domain *domain;

	dev = msm_mdss->dev;

	domain = irq_domain_add_linear(dev->of_node, 32,
			&msm_mdss_irqdomain_ops, msm_mdss);
	if (!domain) {
		dev_err(dev, "failed to add irq_domain\n");
		return -EINVAL;
	}

	msm_mdss->irq_controller.enabled_mask = 0;
	msm_mdss->irq_controller.domain = domain;

	return 0;
}

#define UBWC_1_0 0x10000000
#define UBWC_2_0 0x20000000
#define UBWC_3_0 0x30000000
#define UBWC_4_0 0x40000000
#define UBWC_4_3 0x40030000

static void msm_mdss_setup_ubwc_dec_20(struct msm_mdss *msm_mdss)
{
	const struct msm_mdss_data *data = msm_mdss->mdss_data;

	writel_relaxed(data->ubwc_static, msm_mdss->mmio + UBWC_STATIC);
}

static void msm_mdss_setup_ubwc_dec_30(struct msm_mdss *msm_mdss)
{
	const struct msm_mdss_data *data = msm_mdss->mdss_data;
	u32 value = (data->ubwc_swizzle & 0x1) |
		    (data->highest_bank_bit & 0x3) << 4 |
		    (data->macrotile_mode & 0x1) << 12;

	if (data->ubwc_version == UBWC_3_0)
		value |= BIT(10);

	if (data->ubwc_version == UBWC_1_0)
		value |= BIT(8);

	writel_relaxed(value, msm_mdss->mmio + UBWC_STATIC);
}

static void msm_mdss_setup_ubwc_dec_40(struct msm_mdss *msm_mdss)
{
	const struct msm_mdss_data *data = msm_mdss->mdss_data;
	u32 value = (data->ubwc_swizzle & 0x7) |
		    (data->ubwc_static & 0x1) << 3 |
		    (data->highest_bank_bit & 0x7) << 4 |
		    (data->macrotile_mode & 0x1) << 12;

	writel_relaxed(value, msm_mdss->mmio + UBWC_STATIC);

	if (data->ubwc_version == UBWC_3_0) {
		writel_relaxed(1, msm_mdss->mmio + UBWC_CTRL_2);
		writel_relaxed(0, msm_mdss->mmio + UBWC_PREDICTION_MODE);
	} else {
		if (data->ubwc_dec_version == UBWC_4_3)
			writel_relaxed(3, msm_mdss->mmio + UBWC_CTRL_2);
		else
			writel_relaxed(2, msm_mdss->mmio + UBWC_CTRL_2);
		writel_relaxed(1, msm_mdss->mmio + UBWC_PREDICTION_MODE);
	}
}

static int msm_mdss_enable(struct msm_mdss *msm_mdss)
{
	int ret;

	/*
	 * Several components have AXI clocks that can only be turned on if
	 * the interconnect is enabled (non-zero bandwidth). Let's make sure
	 * that the interconnects are at least at a minimum amount.
	 */
	msm_mdss_icc_request_bw(msm_mdss, MIN_IB_BW);

	ret = clk_bulk_prepare_enable(msm_mdss->num_clocks, msm_mdss->clocks);
	if (ret) {
		dev_err(msm_mdss->dev, "clock enable failed, ret:%d\n", ret);
		return ret;
	}

	/*
	 * Register access requires MDSS_MDP_CLK, which is not enabled by the
	 * mdss on mdp5 hardware. Skip it for now.
	 */
	if (msm_mdss->is_mdp5 || !msm_mdss->mdss_data)
		return 0;

	/*
	 * ubwc config is part of the "mdss" region which is not accessible
	 * from the rest of the driver. hardcode known configurations here
	 *
	 * Decoder version can be read from the UBWC_DEC_HW_VERSION reg,
	 * UBWC_n and the rest of params comes from hw data.
	 */
	switch (msm_mdss->mdss_data->ubwc_dec_version) {
	case UBWC_2_0:
		msm_mdss_setup_ubwc_dec_20(msm_mdss);
		break;
	case UBWC_3_0:
		msm_mdss_setup_ubwc_dec_30(msm_mdss);
		break;
	case UBWC_4_0:
	case UBWC_4_3:
		msm_mdss_setup_ubwc_dec_40(msm_mdss);
		break;
	default:
		dev_err(msm_mdss->dev, "Unsupported UBWC decoder version %x\n",
			msm_mdss->mdss_data->ubwc_dec_version);
		dev_err(msm_mdss->dev, "HW_REV: 0x%x\n",
			readl_relaxed(msm_mdss->mmio + HW_REV));
		dev_err(msm_mdss->dev, "UBWC_DEC_HW_VERSION: 0x%x\n",
			readl_relaxed(msm_mdss->mmio + UBWC_DEC_HW_VERSION));
		break;
	}

	return ret;
}

static int msm_mdss_disable(struct msm_mdss *msm_mdss)
{
	clk_bulk_disable_unprepare(msm_mdss->num_clocks, msm_mdss->clocks);
	msm_mdss_icc_request_bw(msm_mdss, 0);

	return 0;
}

static void msm_mdss_destroy(struct msm_mdss *msm_mdss)
{
	struct platform_device *pdev = to_platform_device(msm_mdss->dev);
	int irq;

	pm_runtime_suspend(msm_mdss->dev);
	pm_runtime_disable(msm_mdss->dev);
	irq_domain_remove(msm_mdss->irq_controller.domain);
	msm_mdss->irq_controller.domain = NULL;
	irq = platform_get_irq(pdev, 0);
	irq_set_chained_handler_and_data(irq, NULL, NULL);
}

static int msm_mdss_reset(struct device *dev)
{
	struct reset_control *reset;

	reset = reset_control_get_optional_exclusive(dev, NULL);
	if (!reset) {
		/* Optional reset not specified */
		return 0;
	} else if (IS_ERR(reset)) {
		return dev_err_probe(dev, PTR_ERR(reset),
				     "failed to acquire mdss reset\n");
	}

	reset_control_assert(reset);
	/*
	 * Tests indicate that reset has to be held for some period of time,
	 * make it one frame in a typical system
	 */
	msleep(20);
	reset_control_deassert(reset);

	reset_control_put(reset);

	return 0;
}

/*
 * MDP5 MDSS uses at most three specified clocks.
 */
#define MDP5_MDSS_NUM_CLOCKS 3
static int mdp5_mdss_parse_clock(struct platform_device *pdev, struct clk_bulk_data **clocks)
{
	struct clk_bulk_data *bulk;
	int num_clocks = 0;
	int ret;

	if (!pdev)
		return -EINVAL;

	bulk = devm_kcalloc(&pdev->dev, MDP5_MDSS_NUM_CLOCKS, sizeof(struct clk_bulk_data), GFP_KERNEL);
	if (!bulk)
		return -ENOMEM;

	bulk[num_clocks++].id = "iface";
	bulk[num_clocks++].id = "bus";
	bulk[num_clocks++].id = "vsync";

	ret = devm_clk_bulk_get_optional(&pdev->dev, num_clocks, bulk);
	if (ret)
		return ret;

	*clocks = bulk;

	return num_clocks;
}

static struct msm_mdss *msm_mdss_init(struct platform_device *pdev, bool is_mdp5)
{
	struct msm_mdss *msm_mdss;
	int ret;
	int irq;

	ret = msm_mdss_reset(&pdev->dev);
	if (ret)
		return ERR_PTR(ret);

	msm_mdss = devm_kzalloc(&pdev->dev, sizeof(*msm_mdss), GFP_KERNEL);
	if (!msm_mdss)
		return ERR_PTR(-ENOMEM);

	msm_mdss->mmio = devm_platform_ioremap_resource_byname(pdev, is_mdp5 ? "mdss_phys" : "mdss");
	if (IS_ERR(msm_mdss->mmio))
		return ERR_CAST(msm_mdss->mmio);

	dev_dbg(&pdev->dev, "mapped mdss address space @%pK\n", msm_mdss->mmio);

	ret = msm_mdss_parse_data_bus_icc_path(&pdev->dev, msm_mdss);
	if (ret)
		return ERR_PTR(ret);
	ret = devm_add_action_or_reset(&pdev->dev, msm_mdss_put_icc_path, msm_mdss);
	if (ret)
		return ERR_PTR(ret);

	if (is_mdp5)
		ret = mdp5_mdss_parse_clock(pdev, &msm_mdss->clocks);
	else
		ret = devm_clk_bulk_get_all(&pdev->dev, &msm_mdss->clocks);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to parse clocks, ret=%d\n", ret);
		return ERR_PTR(ret);
	}
	msm_mdss->num_clocks = ret;
	msm_mdss->is_mdp5 = is_mdp5;

	msm_mdss->dev = &pdev->dev;

	irq = platform_get_irq(pdev, 0);
	if (irq < 0)
		return ERR_PTR(irq);

	ret = _msm_mdss_irq_domain_add(msm_mdss);
	if (ret)
		return ERR_PTR(ret);

	irq_set_chained_handler_and_data(irq, msm_mdss_irq,
					 msm_mdss);

	pm_runtime_enable(&pdev->dev);

	return msm_mdss;
}

static int __maybe_unused mdss_runtime_suspend(struct device *dev)
{
	struct msm_mdss *mdss = dev_get_drvdata(dev);

	DBG("");

	return msm_mdss_disable(mdss);
}

static int __maybe_unused mdss_runtime_resume(struct device *dev)
{
	struct msm_mdss *mdss = dev_get_drvdata(dev);

	DBG("");

	return msm_mdss_enable(mdss);
}

static int __maybe_unused mdss_pm_suspend(struct device *dev)
{

	if (pm_runtime_suspended(dev))
		return 0;

	return mdss_runtime_suspend(dev);
}

static int __maybe_unused mdss_pm_resume(struct device *dev)
{
	if (pm_runtime_suspended(dev))
		return 0;

	return mdss_runtime_resume(dev);
}

static const struct dev_pm_ops mdss_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(mdss_pm_suspend, mdss_pm_resume)
	SET_RUNTIME_PM_OPS(mdss_runtime_suspend, mdss_runtime_resume, NULL)
};

static int mdss_probe(struct platform_device *pdev)
{
	struct msm_mdss *mdss;
	bool is_mdp5 = of_device_is_compatible(pdev->dev.of_node, "qcom,mdss");
	struct device *dev = &pdev->dev;
	int ret;

	mdss = msm_mdss_init(pdev, is_mdp5);
	if (IS_ERR(mdss))
		return PTR_ERR(mdss);

	mdss->mdss_data = of_device_get_match_data(&pdev->dev);

	platform_set_drvdata(pdev, mdss);

	/*
	 * MDP5/DPU based devices don't have a flat hierarchy. There is a top
	 * level parent: MDSS, and children: MDP5/DPU, DSI, HDMI, eDP etc.
	 * Populate the children devices, find the MDP5/DPU node, and then add
	 * the interfaces to our components list.
	 */
	ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
	if (ret) {
		DRM_DEV_ERROR(dev, "failed to populate children devices\n");
		msm_mdss_destroy(mdss);
		return ret;
	}

	return 0;
}

static int mdss_remove(struct platform_device *pdev)
{
	struct msm_mdss *mdss = platform_get_drvdata(pdev);

	of_platform_depopulate(&pdev->dev);

	msm_mdss_destroy(mdss);

	return 0;
}

static const struct msm_mdss_data sc7180_data = {
	.ubwc_version = UBWC_2_0,
	.ubwc_dec_version = UBWC_2_0,
	.ubwc_static = 0x1e,
};

static const struct msm_mdss_data sc7280_data = {
	.ubwc_version = UBWC_3_0,
	.ubwc_dec_version = UBWC_4_0,
	.ubwc_swizzle = 6,
	.ubwc_static = 1,
	.highest_bank_bit = 1,
	.macrotile_mode = 1,
};

static const struct msm_mdss_data sc8180x_data = {
	.ubwc_version = UBWC_3_0,
	.ubwc_dec_version = UBWC_3_0,
	.highest_bank_bit = 3,
	.macrotile_mode = 1,
};

static const struct msm_mdss_data sc8280xp_data = {
	.ubwc_version = UBWC_4_0,
	.ubwc_dec_version = UBWC_4_0,
	.ubwc_swizzle = 6,
	.ubwc_static = 1,
	.highest_bank_bit = 2,
	.macrotile_mode = 1,
};

static const struct msm_mdss_data sdm845_data = {
	.ubwc_version = UBWC_2_0,
	.ubwc_dec_version = UBWC_2_0,
	.highest_bank_bit = 2,
};

static const struct msm_mdss_data sm6350_data = {
	.ubwc_version = UBWC_2_0,
	.ubwc_dec_version = UBWC_2_0,
	.ubwc_swizzle = 6,
	.ubwc_static = 0x1e,
	.highest_bank_bit = 1,
};

static const struct msm_mdss_data sm8150_data = {
	.ubwc_version = UBWC_3_0,
	.ubwc_dec_version = UBWC_3_0,
	.highest_bank_bit = 2,
};

static const struct msm_mdss_data sm6115_data = {
	.ubwc_version = UBWC_1_0,
	.ubwc_dec_version = UBWC_2_0,
	.ubwc_swizzle = 7,
	.ubwc_static = 0x11f,
};

static const struct msm_mdss_data sm8250_data = {
	.ubwc_version = UBWC_4_0,
	.ubwc_dec_version = UBWC_4_0,
	.ubwc_swizzle = 6,
	.ubwc_static = 1,
	/* TODO: highest_bank_bit = 2 for LP_DDR4 */
	.highest_bank_bit = 3,
	.macrotile_mode = 1,
};

static const struct msm_mdss_data sm8550_data = {
	.ubwc_version = UBWC_4_0,
	.ubwc_dec_version = UBWC_4_3,
	.ubwc_swizzle = 6,
	.ubwc_static = 1,
	/* TODO: highest_bank_bit = 2 for LP_DDR4 */
	.highest_bank_bit = 3,
	.macrotile_mode = 1,
};

static const struct of_device_id mdss_dt_match[] = {
	{ .compatible = "qcom,mdss" },
	{ .compatible = "qcom,msm8998-mdss" },
	{ .compatible = "qcom,qcm2290-mdss" },
	{ .compatible = "qcom,sdm845-mdss", .data = &sdm845_data },
	{ .compatible = "qcom,sc7180-mdss", .data = &sc7180_data },
	{ .compatible = "qcom,sc7280-mdss", .data = &sc7280_data },
	{ .compatible = "qcom,sc8180x-mdss", .data = &sc8180x_data },
	{ .compatible = "qcom,sc8280xp-mdss", .data = &sc8280xp_data },
	{ .compatible = "qcom,sm6115-mdss", .data = &sm6115_data },
	{ .compatible = "qcom,sm6350-mdss", .data = &sm6350_data },
	{ .compatible = "qcom,sm6375-mdss", .data = &sm6350_data },
	{ .compatible = "qcom,sm8150-mdss", .data = &sm8150_data },
	{ .compatible = "qcom,sm8250-mdss", .data = &sm8250_data },
	{ .compatible = "qcom,sm8350-mdss", .data = &sm8250_data },
	{ .compatible = "qcom,sm8450-mdss", .data = &sm8250_data },
	{ .compatible = "qcom,sm8550-mdss", .data = &sm8550_data },
	{}
};
MODULE_DEVICE_TABLE(of, mdss_dt_match);

static struct platform_driver mdss_platform_driver = {
	.probe      = mdss_probe,
	.remove     = mdss_remove,
	.driver     = {
		.name   = "msm-mdss",
		.of_match_table = mdss_dt_match,
		.pm     = &mdss_pm_ops,
	},
};

void __init msm_mdss_register(void)
{
	platform_driver_register(&mdss_platform_driver);
}

void __exit msm_mdss_unregister(void)
{
	platform_driver_unregister(&mdss_platform_driver);
}