summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/meson/meson_drv.c
blob: 397c33182f4f83325d066bf5454d0ebd1cc5b14c (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
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2016 BayLibre, SAS
 * Author: Neil Armstrong <narmstrong@baylibre.com>
 * Copyright (C) 2014 Endless Mobile
 *
 * Written by:
 *     Jasper St. Pierre <jstpierre@mecheye.net>
 */

#include <linux/component.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <linux/soc/amlogic/meson-canvas.h>

#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_irq.h>
#include <drm/drm_modeset_helper_vtables.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>

#include "meson_crtc.h"
#include "meson_drv.h"
#include "meson_overlay.h"
#include "meson_plane.h"
#include "meson_registers.h"
#include "meson_venc_cvbs.h"
#include "meson_viu.h"
#include "meson_vpp.h"

#define DRIVER_NAME "meson"
#define DRIVER_DESC "Amlogic Meson DRM driver"

/**
 * DOC: Video Processing Unit
 *
 * VPU Handles the Global Video Processing, it includes management of the
 * clocks gates, blocks reset lines and power domains.
 *
 * What is missing :
 *
 * - Full reset of entire video processing HW blocks
 * - Scaling and setup of the VPU clock
 * - Bus clock gates
 * - Powering up video processing HW blocks
 * - Powering Up HDMI controller and PHY
 */

static const struct drm_mode_config_funcs meson_mode_config_funcs = {
	.atomic_check        = drm_atomic_helper_check,
	.atomic_commit       = drm_atomic_helper_commit,
	.fb_create           = drm_gem_fb_create,
};

static const struct drm_mode_config_helper_funcs meson_mode_config_helpers = {
	.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
};

static irqreturn_t meson_irq(int irq, void *arg)
{
	struct drm_device *dev = arg;
	struct meson_drm *priv = dev->dev_private;

	(void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));

	meson_crtc_irq(priv);

	return IRQ_HANDLED;
}

static int meson_dumb_create(struct drm_file *file, struct drm_device *dev,
			     struct drm_mode_create_dumb *args)
{
	/*
	 * We need 64bytes aligned stride, and PAGE aligned size
	 */
	args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), SZ_64);
	args->size = PAGE_ALIGN(args->pitch * args->height);

	return drm_gem_cma_dumb_create_internal(file, dev, args);
}

DEFINE_DRM_GEM_CMA_FOPS(fops);

static struct drm_driver meson_driver = {
	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,

	/* IRQ */
	.irq_handler		= meson_irq,

	/* PRIME Ops */
	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
	.gem_prime_get_sg_table	= drm_gem_cma_prime_get_sg_table,
	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
	.gem_prime_vmap		= drm_gem_cma_prime_vmap,
	.gem_prime_vunmap	= drm_gem_cma_prime_vunmap,
	.gem_prime_mmap		= drm_gem_cma_prime_mmap,

	/* GEM Ops */
	.dumb_create		= meson_dumb_create,
	.gem_free_object_unlocked = drm_gem_cma_free_object,
	.gem_vm_ops		= &drm_gem_cma_vm_ops,

	/* Misc */
	.fops			= &fops,
	.name			= DRIVER_NAME,
	.desc			= DRIVER_DESC,
	.date			= "20161109",
	.major			= 1,
	.minor			= 0,
};

static bool meson_vpu_has_available_connectors(struct device *dev)
{
	struct device_node *ep, *remote;

	/* Parses each endpoint and check if remote exists */
	for_each_endpoint_of_node(dev->of_node, ep) {
		/* If the endpoint node exists, consider it enabled */
		remote = of_graph_get_remote_port(ep);
		if (remote)
			return true;
	}

	return false;
}

static struct regmap_config meson_regmap_config = {
	.reg_bits       = 32,
	.val_bits       = 32,
	.reg_stride     = 4,
	.max_register   = 0x1000,
};

static void meson_vpu_init(struct meson_drm *priv)
{
	u32 value;

	/*
	 * Slave dc0 and dc5 connected to master port 1.
	 * By default other slaves are connected to master port 0.
	 */
	value = VPU_RDARB_SLAVE_TO_MASTER_PORT(0, 1) |
		VPU_RDARB_SLAVE_TO_MASTER_PORT(5, 1);
	writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L1C1));

	/* Slave dc0 connected to master port 1 */
	value = VPU_RDARB_SLAVE_TO_MASTER_PORT(0, 1);
	writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L1C2));

	/* Slave dc4 and dc7 connected to master port 1 */
	value = VPU_RDARB_SLAVE_TO_MASTER_PORT(4, 1) |
		VPU_RDARB_SLAVE_TO_MASTER_PORT(7, 1);
	writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L2C1));

	/* Slave dc1 connected to master port 1 */
	value = VPU_RDARB_SLAVE_TO_MASTER_PORT(1, 1);
	writel_relaxed(value, priv->io_base + _REG(VPU_WRARB_MODE_L2C1));
}

static void meson_remove_framebuffers(void)
{
	struct apertures_struct *ap;

	ap = alloc_apertures(1);
	if (!ap)
		return;

	/* The framebuffer can be located anywhere in RAM */
	ap->ranges[0].base = 0;
	ap->ranges[0].size = ~0;

	drm_fb_helper_remove_conflicting_framebuffers(ap, "meson-drm-fb",
						      false);
	kfree(ap);
}

static int meson_drv_bind_master(struct device *dev, bool has_components)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct meson_drm *priv;
	struct drm_device *drm;
	struct resource *res;
	void __iomem *regs;
	int ret;

	/* Checks if an output connector is available */
	if (!meson_vpu_has_available_connectors(dev)) {
		dev_err(dev, "No output connector available\n");
		return -ENODEV;
	}

	drm = drm_dev_alloc(&meson_driver, dev);
	if (IS_ERR(drm))
		return PTR_ERR(drm);

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		ret = -ENOMEM;
		goto free_drm;
	}
	drm->dev_private = priv;
	priv->drm = drm;
	priv->dev = dev;

	priv->compat = (enum vpu_compatible)of_device_get_match_data(priv->dev);

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
	regs = devm_ioremap_resource(dev, res);
	if (IS_ERR(regs)) {
		ret = PTR_ERR(regs);
		goto free_drm;
	}

	priv->io_base = regs;

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
	if (!res) {
		ret = -EINVAL;
		goto free_drm;
	}
	/* Simply ioremap since it may be a shared register zone */
	regs = devm_ioremap(dev, res->start, resource_size(res));
	if (!regs) {
		ret = -EADDRNOTAVAIL;
		goto free_drm;
	}

	priv->hhi = devm_regmap_init_mmio(dev, regs,
					  &meson_regmap_config);
	if (IS_ERR(priv->hhi)) {
		dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
		ret = PTR_ERR(priv->hhi);
		goto free_drm;
	}

	priv->canvas = meson_canvas_get(dev);
	if (IS_ERR(priv->canvas)) {
		ret = PTR_ERR(priv->canvas);
		goto free_drm;
	}

	ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_osd1);
	if (ret)
		goto free_drm;
	ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_0);
	if (ret) {
		meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
		goto free_drm;
	}
	ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_1);
	if (ret) {
		meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
		meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
		goto free_drm;
	}
	ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_2);
	if (ret) {
		meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
		meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
		meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
		goto free_drm;
	}

	priv->vsync_irq = platform_get_irq(pdev, 0);

	ret = drm_vblank_init(drm, 1);
	if (ret)
		goto free_drm;

	/* Remove early framebuffers (ie. simplefb) */
	meson_remove_framebuffers();

	drm_mode_config_init(drm);
	drm->mode_config.max_width = 3840;
	drm->mode_config.max_height = 2160;
	drm->mode_config.funcs = &meson_mode_config_funcs;
	drm->mode_config.helper_private	= &meson_mode_config_helpers;

	/* Hardware Initialization */

	meson_vpu_init(priv);
	meson_venc_init(priv);
	meson_vpp_init(priv);
	meson_viu_init(priv);

	/* Encoder Initialization */

	ret = meson_venc_cvbs_create(priv);
	if (ret)
		goto free_drm;

	if (has_components) {
		ret = component_bind_all(drm->dev, drm);
		if (ret) {
			dev_err(drm->dev, "Couldn't bind all components\n");
			goto free_drm;
		}
	}

	ret = meson_plane_create(priv);
	if (ret)
		goto free_drm;

	ret = meson_overlay_create(priv);
	if (ret)
		goto free_drm;

	ret = meson_crtc_create(priv);
	if (ret)
		goto free_drm;

	ret = drm_irq_install(drm, priv->vsync_irq);
	if (ret)
		goto free_drm;

	drm_mode_config_reset(drm);

	drm_kms_helper_poll_init(drm);

	platform_set_drvdata(pdev, priv);

	ret = drm_dev_register(drm, 0);
	if (ret)
		goto uninstall_irq;

	drm_fbdev_generic_setup(drm, 32);

	return 0;

uninstall_irq:
	drm_irq_uninstall(drm);
free_drm:
	drm_dev_put(drm);

	return ret;
}

static int meson_drv_bind(struct device *dev)
{
	return meson_drv_bind_master(dev, true);
}

static void meson_drv_unbind(struct device *dev)
{
	struct meson_drm *priv = dev_get_drvdata(dev);
	struct drm_device *drm = priv->drm;

	if (priv->canvas) {
		meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
		meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
		meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
		meson_canvas_free(priv->canvas, priv->canvas_id_vd1_2);
	}

	drm_dev_unregister(drm);
	drm_irq_uninstall(drm);
	drm_kms_helper_poll_fini(drm);
	drm_mode_config_cleanup(drm);
	drm_dev_put(drm);

}

static const struct component_master_ops meson_drv_master_ops = {
	.bind	= meson_drv_bind,
	.unbind	= meson_drv_unbind,
};

static int __maybe_unused meson_drv_pm_suspend(struct device *dev)
{
	struct meson_drm *priv = dev_get_drvdata(dev);

	if (!priv)
		return 0;

	return drm_mode_config_helper_suspend(priv->drm);
}

static int __maybe_unused meson_drv_pm_resume(struct device *dev)
{
	struct meson_drm *priv = dev_get_drvdata(dev);

	if (!priv)
		return 0;

	meson_vpu_init(priv);
	meson_venc_init(priv);
	meson_vpp_init(priv);
	meson_viu_init(priv);

	drm_mode_config_helper_resume(priv->drm);

	return 0;
}

static int compare_of(struct device *dev, void *data)
{
	DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
			 dev->of_node, data);

	return dev->of_node == data;
}

/* Possible connectors nodes to ignore */
static const struct of_device_id connectors_match[] = {
	{ .compatible = "composite-video-connector" },
	{ .compatible = "svideo-connector" },
	{ .compatible = "hdmi-connector" },
	{ .compatible = "dvi-connector" },
	{}
};

static int meson_probe_remote(struct platform_device *pdev,
			      struct component_match **match,
			      struct device_node *parent,
			      struct device_node *remote)
{
	struct device_node *ep, *remote_node;
	int count = 1;

	/* If node is a connector, return and do not add to match table */
	if (of_match_node(connectors_match, remote))
		return 1;

	component_match_add(&pdev->dev, match, compare_of, remote);

	for_each_endpoint_of_node(remote, ep) {
		remote_node = of_graph_get_remote_port_parent(ep);
		if (!remote_node ||
		    remote_node == parent || /* Ignore parent endpoint */
		    !of_device_is_available(remote_node)) {
			of_node_put(remote_node);
			continue;
		}

		count += meson_probe_remote(pdev, match, remote, remote_node);

		of_node_put(remote_node);
	}

	return count;
}

static int meson_drv_probe(struct platform_device *pdev)
{
	struct component_match *match = NULL;
	struct device_node *np = pdev->dev.of_node;
	struct device_node *ep, *remote;
	int count = 0;

	for_each_endpoint_of_node(np, ep) {
		remote = of_graph_get_remote_port_parent(ep);
		if (!remote || !of_device_is_available(remote)) {
			of_node_put(remote);
			continue;
		}

		count += meson_probe_remote(pdev, &match, np, remote);
		of_node_put(remote);
	}

	if (count && !match)
		return meson_drv_bind_master(&pdev->dev, false);

	/* If some endpoints were found, initialize the nodes */
	if (count) {
		dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);

		return component_master_add_with_match(&pdev->dev,
						       &meson_drv_master_ops,
						       match);
	}

	/* If no output endpoints were available, simply bail out */
	return 0;
};

static const struct of_device_id dt_match[] = {
	{ .compatible = "amlogic,meson-gxbb-vpu",
	  .data       = (void *)VPU_COMPATIBLE_GXBB },
	{ .compatible = "amlogic,meson-gxl-vpu",
	  .data       = (void *)VPU_COMPATIBLE_GXL },
	{ .compatible = "amlogic,meson-gxm-vpu",
	  .data       = (void *)VPU_COMPATIBLE_GXM },
	{ .compatible = "amlogic,meson-g12a-vpu",
	  .data       = (void *)VPU_COMPATIBLE_G12A },
	{}
};
MODULE_DEVICE_TABLE(of, dt_match);

static const struct dev_pm_ops meson_drv_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(meson_drv_pm_suspend, meson_drv_pm_resume)
};

static struct platform_driver meson_drm_platform_driver = {
	.probe      = meson_drv_probe,
	.driver     = {
		.name	= "meson-drm",
		.of_match_table = dt_match,
		.pm = &meson_drv_pm_ops,
	},
};

module_platform_driver(meson_drm_platform_driver);

MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");