1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2016 BayLibre, SAS
4 * Author: Neil Armstrong <narmstrong@baylibre.com>
5 * Copyright (C) 2014 Endless Mobile
6 *
7 * Written by:
8 * Jasper St. Pierre <jstpierre@mecheye.net>
9 */
10
11 #include <linux/component.h>
12 #include <linux/module.h>
13 #include <linux/of_graph.h>
14 #include <linux/sys_soc.h>
15 #include <linux/platform_device.h>
16 #include <linux/soc/amlogic/meson-canvas.h>
17
18 #include <drm/drm_atomic_helper.h>
19 #include <drm/drm_drv.h>
20 #include <drm/drm_fb_helper.h>
21 #include <drm/drm_gem_cma_helper.h>
22 #include <drm/drm_gem_framebuffer_helper.h>
23 #include <drm/drm_irq.h>
24 #include <drm/drm_modeset_helper_vtables.h>
25 #include <drm/drm_probe_helper.h>
26 #include <drm/drm_vblank.h>
27
28 #include "meson_crtc.h"
29 #include "meson_drv.h"
30 #include "meson_overlay.h"
31 #include "meson_plane.h"
32 #include "meson_osd_afbcd.h"
33 #include "meson_registers.h"
34 #include "meson_venc_cvbs.h"
35 #include "meson_viu.h"
36 #include "meson_vpp.h"
37 #include "meson_rdma.h"
38
39 #define DRIVER_NAME "meson"
40 #define DRIVER_DESC "Amlogic Meson DRM driver"
41
42 /**
43 * DOC: Video Processing Unit
44 *
45 * VPU Handles the Global Video Processing, it includes management of the
46 * clocks gates, blocks reset lines and power domains.
47 *
48 * What is missing :
49 *
50 * - Full reset of entire video processing HW blocks
51 * - Scaling and setup of the VPU clock
52 * - Bus clock gates
53 * - Powering up video processing HW blocks
54 * - Powering Up HDMI controller and PHY
55 */
56
57 static const struct drm_mode_config_funcs meson_mode_config_funcs = {
58 .atomic_check = drm_atomic_helper_check,
59 .atomic_commit = drm_atomic_helper_commit,
60 .fb_create = drm_gem_fb_create,
61 };
62
63 static const struct drm_mode_config_helper_funcs meson_mode_config_helpers = {
64 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
65 };
66
meson_irq(int irq,void * arg)67 static irqreturn_t meson_irq(int irq, void *arg)
68 {
69 struct drm_device *dev = arg;
70 struct meson_drm *priv = dev->dev_private;
71
72 (void)readl_relaxed(priv->io_base + _REG(VENC_INTFLAG));
73
74 meson_crtc_irq(priv);
75
76 return IRQ_HANDLED;
77 }
78
meson_dumb_create(struct drm_file * file,struct drm_device * dev,struct drm_mode_create_dumb * args)79 static int meson_dumb_create(struct drm_file *file, struct drm_device *dev,
80 struct drm_mode_create_dumb *args)
81 {
82 /*
83 * We need 64bytes aligned stride, and PAGE aligned size
84 */
85 args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), SZ_64);
86 args->size = PAGE_ALIGN(args->pitch * args->height);
87
88 return drm_gem_cma_dumb_create_internal(file, dev, args);
89 }
90
91 DEFINE_DRM_GEM_CMA_FOPS(fops);
92
93 static struct drm_driver meson_driver = {
94 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
95
96 /* IRQ */
97 .irq_handler = meson_irq,
98
99 /* CMA Ops */
100 DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(meson_dumb_create),
101
102 /* Misc */
103 .fops = &fops,
104 .name = DRIVER_NAME,
105 .desc = DRIVER_DESC,
106 .date = "20161109",
107 .major = 1,
108 .minor = 0,
109 };
110
meson_vpu_has_available_connectors(struct device * dev)111 static bool meson_vpu_has_available_connectors(struct device *dev)
112 {
113 struct device_node *ep, *remote;
114
115 /* Parses each endpoint and check if remote exists */
116 for_each_endpoint_of_node(dev->of_node, ep) {
117 /* If the endpoint node exists, consider it enabled */
118 remote = of_graph_get_remote_port(ep);
119 if (remote) {
120 of_node_put(remote);
121 of_node_put(ep);
122 return true;
123 }
124 }
125
126 return false;
127 }
128
129 static struct regmap_config meson_regmap_config = {
130 .reg_bits = 32,
131 .val_bits = 32,
132 .reg_stride = 4,
133 .max_register = 0x1000,
134 };
135
meson_vpu_init(struct meson_drm * priv)136 static void meson_vpu_init(struct meson_drm *priv)
137 {
138 u32 value;
139
140 /*
141 * Slave dc0 and dc5 connected to master port 1.
142 * By default other slaves are connected to master port 0.
143 */
144 value = VPU_RDARB_SLAVE_TO_MASTER_PORT(0, 1) |
145 VPU_RDARB_SLAVE_TO_MASTER_PORT(5, 1);
146 writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L1C1));
147
148 /* Slave dc0 connected to master port 1 */
149 value = VPU_RDARB_SLAVE_TO_MASTER_PORT(0, 1);
150 writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L1C2));
151
152 /* Slave dc4 and dc7 connected to master port 1 */
153 value = VPU_RDARB_SLAVE_TO_MASTER_PORT(4, 1) |
154 VPU_RDARB_SLAVE_TO_MASTER_PORT(7, 1);
155 writel_relaxed(value, priv->io_base + _REG(VPU_RDARB_MODE_L2C1));
156
157 /* Slave dc1 connected to master port 1 */
158 value = VPU_RDARB_SLAVE_TO_MASTER_PORT(1, 1);
159 writel_relaxed(value, priv->io_base + _REG(VPU_WRARB_MODE_L2C1));
160 }
161
meson_remove_framebuffers(void)162 static void meson_remove_framebuffers(void)
163 {
164 struct apertures_struct *ap;
165
166 ap = alloc_apertures(1);
167 if (!ap)
168 return;
169
170 /* The framebuffer can be located anywhere in RAM */
171 ap->ranges[0].base = 0;
172 ap->ranges[0].size = ~0;
173
174 drm_fb_helper_remove_conflicting_framebuffers(ap, "meson-drm-fb",
175 false);
176 kfree(ap);
177 }
178
179 struct meson_drm_soc_attr {
180 struct meson_drm_soc_limits limits;
181 const struct soc_device_attribute *attrs;
182 };
183
184 static const struct meson_drm_soc_attr meson_drm_soc_attrs[] = {
185 /* S805X/S805Y HDMI PLL won't lock for HDMI PHY freq > 1,65GHz */
186 {
187 .limits = {
188 .max_hdmi_phy_freq = 1650000,
189 },
190 .attrs = (const struct soc_device_attribute []) {
191 { .soc_id = "GXL (S805*)", },
192 { /* sentinel */ },
193 }
194 },
195 };
196
meson_drv_bind_master(struct device * dev,bool has_components)197 static int meson_drv_bind_master(struct device *dev, bool has_components)
198 {
199 struct platform_device *pdev = to_platform_device(dev);
200 const struct meson_drm_match_data *match;
201 struct meson_drm *priv;
202 struct drm_device *drm;
203 struct resource *res;
204 void __iomem *regs;
205 int ret, i;
206
207 /* Checks if an output connector is available */
208 if (!meson_vpu_has_available_connectors(dev)) {
209 dev_err(dev, "No output connector available\n");
210 return -ENODEV;
211 }
212
213 match = of_device_get_match_data(dev);
214 if (!match)
215 return -ENODEV;
216
217 drm = drm_dev_alloc(&meson_driver, dev);
218 if (IS_ERR(drm))
219 return PTR_ERR(drm);
220
221 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
222 if (!priv) {
223 ret = -ENOMEM;
224 goto free_drm;
225 }
226 drm->dev_private = priv;
227 priv->drm = drm;
228 priv->dev = dev;
229 priv->compat = match->compat;
230 priv->afbcd.ops = match->afbcd_ops;
231
232 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
233 regs = devm_ioremap_resource(dev, res);
234 if (IS_ERR(regs)) {
235 ret = PTR_ERR(regs);
236 goto free_drm;
237 }
238
239 priv->io_base = regs;
240
241 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
242 if (!res) {
243 ret = -EINVAL;
244 goto free_drm;
245 }
246 /* Simply ioremap since it may be a shared register zone */
247 regs = devm_ioremap(dev, res->start, resource_size(res));
248 if (!regs) {
249 ret = -EADDRNOTAVAIL;
250 goto free_drm;
251 }
252
253 priv->hhi = devm_regmap_init_mmio(dev, regs,
254 &meson_regmap_config);
255 if (IS_ERR(priv->hhi)) {
256 dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
257 ret = PTR_ERR(priv->hhi);
258 goto free_drm;
259 }
260
261 priv->canvas = meson_canvas_get(dev);
262 if (IS_ERR(priv->canvas)) {
263 ret = PTR_ERR(priv->canvas);
264 goto free_drm;
265 }
266
267 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_osd1);
268 if (ret)
269 goto free_drm;
270 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_0);
271 if (ret) {
272 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
273 goto free_drm;
274 }
275 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_1);
276 if (ret) {
277 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
278 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
279 goto free_drm;
280 }
281 ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_vd1_2);
282 if (ret) {
283 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
284 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
285 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
286 goto free_drm;
287 }
288
289 priv->vsync_irq = platform_get_irq(pdev, 0);
290
291 ret = drm_vblank_init(drm, 1);
292 if (ret)
293 goto free_drm;
294
295 /* Assign limits per soc revision/package */
296 for (i = 0 ; i < ARRAY_SIZE(meson_drm_soc_attrs) ; ++i) {
297 if (soc_device_match(meson_drm_soc_attrs[i].attrs)) {
298 priv->limits = &meson_drm_soc_attrs[i].limits;
299 break;
300 }
301 }
302
303 /* Remove early framebuffers (ie. simplefb) */
304 meson_remove_framebuffers();
305
306 ret = drmm_mode_config_init(drm);
307 if (ret)
308 goto free_drm;
309 drm->mode_config.max_width = 3840;
310 drm->mode_config.max_height = 2160;
311 drm->mode_config.funcs = &meson_mode_config_funcs;
312 drm->mode_config.helper_private = &meson_mode_config_helpers;
313
314 /* Hardware Initialization */
315
316 meson_vpu_init(priv);
317 meson_venc_init(priv);
318 meson_vpp_init(priv);
319 meson_viu_init(priv);
320 if (priv->afbcd.ops) {
321 ret = priv->afbcd.ops->init(priv);
322 if (ret)
323 goto free_drm;
324 }
325
326 /* Encoder Initialization */
327
328 ret = meson_venc_cvbs_create(priv);
329 if (ret)
330 goto exit_afbcd;
331
332 if (has_components) {
333 ret = component_bind_all(drm->dev, drm);
334 if (ret) {
335 dev_err(drm->dev, "Couldn't bind all components\n");
336 goto exit_afbcd;
337 }
338 }
339
340 ret = meson_plane_create(priv);
341 if (ret)
342 goto unbind_all;
343
344 ret = meson_overlay_create(priv);
345 if (ret)
346 goto unbind_all;
347
348 ret = meson_crtc_create(priv);
349 if (ret)
350 goto unbind_all;
351
352 ret = drm_irq_install(drm, priv->vsync_irq);
353 if (ret)
354 goto unbind_all;
355
356 drm_mode_config_reset(drm);
357
358 drm_kms_helper_poll_init(drm);
359
360 platform_set_drvdata(pdev, priv);
361
362 ret = drm_dev_register(drm, 0);
363 if (ret)
364 goto uninstall_irq;
365
366 drm_fbdev_generic_setup(drm, 32);
367
368 return 0;
369
370 uninstall_irq:
371 drm_irq_uninstall(drm);
372 unbind_all:
373 if (has_components)
374 component_unbind_all(drm->dev, drm);
375 exit_afbcd:
376 if (priv->afbcd.ops)
377 priv->afbcd.ops->exit(priv);
378 free_drm:
379 drm_dev_put(drm);
380
381 return ret;
382 }
383
meson_drv_bind(struct device * dev)384 static int meson_drv_bind(struct device *dev)
385 {
386 return meson_drv_bind_master(dev, true);
387 }
388
meson_drv_unbind(struct device * dev)389 static void meson_drv_unbind(struct device *dev)
390 {
391 struct meson_drm *priv = dev_get_drvdata(dev);
392 struct drm_device *drm = priv->drm;
393
394 if (priv->canvas) {
395 meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
396 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_0);
397 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_1);
398 meson_canvas_free(priv->canvas, priv->canvas_id_vd1_2);
399 }
400
401 drm_dev_unregister(drm);
402 drm_kms_helper_poll_fini(drm);
403 drm_atomic_helper_shutdown(drm);
404 component_unbind_all(dev, drm);
405 drm_irq_uninstall(drm);
406 drm_dev_put(drm);
407
408 if (priv->afbcd.ops)
409 priv->afbcd.ops->exit(priv);
410 }
411
412 static const struct component_master_ops meson_drv_master_ops = {
413 .bind = meson_drv_bind,
414 .unbind = meson_drv_unbind,
415 };
416
meson_drv_pm_suspend(struct device * dev)417 static int __maybe_unused meson_drv_pm_suspend(struct device *dev)
418 {
419 struct meson_drm *priv = dev_get_drvdata(dev);
420
421 if (!priv)
422 return 0;
423
424 return drm_mode_config_helper_suspend(priv->drm);
425 }
426
meson_drv_pm_resume(struct device * dev)427 static int __maybe_unused meson_drv_pm_resume(struct device *dev)
428 {
429 struct meson_drm *priv = dev_get_drvdata(dev);
430
431 if (!priv)
432 return 0;
433
434 meson_vpu_init(priv);
435 meson_venc_init(priv);
436 meson_vpp_init(priv);
437 meson_viu_init(priv);
438 if (priv->afbcd.ops)
439 priv->afbcd.ops->init(priv);
440
441 return drm_mode_config_helper_resume(priv->drm);
442 }
443
compare_of(struct device * dev,void * data)444 static int compare_of(struct device *dev, void *data)
445 {
446 DRM_DEBUG_DRIVER("Comparing of node %pOF with %pOF\n",
447 dev->of_node, data);
448
449 return dev->of_node == data;
450 }
451
452 /* Possible connectors nodes to ignore */
453 static const struct of_device_id connectors_match[] = {
454 { .compatible = "composite-video-connector" },
455 { .compatible = "svideo-connector" },
456 { .compatible = "hdmi-connector" },
457 { .compatible = "dvi-connector" },
458 {}
459 };
460
meson_probe_remote(struct platform_device * pdev,struct component_match ** match,struct device_node * parent,struct device_node * remote)461 static int meson_probe_remote(struct platform_device *pdev,
462 struct component_match **match,
463 struct device_node *parent,
464 struct device_node *remote)
465 {
466 struct device_node *ep, *remote_node;
467 int count = 1;
468
469 /* If node is a connector, return and do not add to match table */
470 if (of_match_node(connectors_match, remote))
471 return 1;
472
473 component_match_add(&pdev->dev, match, compare_of, remote);
474
475 for_each_endpoint_of_node(remote, ep) {
476 remote_node = of_graph_get_remote_port_parent(ep);
477 if (!remote_node ||
478 remote_node == parent || /* Ignore parent endpoint */
479 !of_device_is_available(remote_node)) {
480 of_node_put(remote_node);
481 continue;
482 }
483
484 count += meson_probe_remote(pdev, match, remote, remote_node);
485
486 of_node_put(remote_node);
487 }
488
489 return count;
490 }
491
meson_drv_shutdown(struct platform_device * pdev)492 static void meson_drv_shutdown(struct platform_device *pdev)
493 {
494 struct meson_drm *priv = dev_get_drvdata(&pdev->dev);
495
496 if (!priv)
497 return;
498
499 drm_kms_helper_poll_fini(priv->drm);
500 drm_atomic_helper_shutdown(priv->drm);
501 }
502
meson_drv_probe(struct platform_device * pdev)503 static int meson_drv_probe(struct platform_device *pdev)
504 {
505 struct component_match *match = NULL;
506 struct device_node *np = pdev->dev.of_node;
507 struct device_node *ep, *remote;
508 int count = 0;
509
510 for_each_endpoint_of_node(np, ep) {
511 remote = of_graph_get_remote_port_parent(ep);
512 if (!remote || !of_device_is_available(remote)) {
513 of_node_put(remote);
514 continue;
515 }
516
517 count += meson_probe_remote(pdev, &match, np, remote);
518 of_node_put(remote);
519 }
520
521 if (count && !match)
522 return meson_drv_bind_master(&pdev->dev, false);
523
524 /* If some endpoints were found, initialize the nodes */
525 if (count) {
526 dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);
527
528 return component_master_add_with_match(&pdev->dev,
529 &meson_drv_master_ops,
530 match);
531 }
532
533 /* If no output endpoints were available, simply bail out */
534 return 0;
535 };
536
meson_drv_remove(struct platform_device * pdev)537 static int meson_drv_remove(struct platform_device *pdev)
538 {
539 component_master_del(&pdev->dev, &meson_drv_master_ops);
540
541 return 0;
542 }
543
544 static struct meson_drm_match_data meson_drm_gxbb_data = {
545 .compat = VPU_COMPATIBLE_GXBB,
546 };
547
548 static struct meson_drm_match_data meson_drm_gxl_data = {
549 .compat = VPU_COMPATIBLE_GXL,
550 };
551
552 static struct meson_drm_match_data meson_drm_gxm_data = {
553 .compat = VPU_COMPATIBLE_GXM,
554 .afbcd_ops = &meson_afbcd_gxm_ops,
555 };
556
557 static struct meson_drm_match_data meson_drm_g12a_data = {
558 .compat = VPU_COMPATIBLE_G12A,
559 .afbcd_ops = &meson_afbcd_g12a_ops,
560 };
561
562 static const struct of_device_id dt_match[] = {
563 { .compatible = "amlogic,meson-gxbb-vpu",
564 .data = (void *)&meson_drm_gxbb_data },
565 { .compatible = "amlogic,meson-gxl-vpu",
566 .data = (void *)&meson_drm_gxl_data },
567 { .compatible = "amlogic,meson-gxm-vpu",
568 .data = (void *)&meson_drm_gxm_data },
569 { .compatible = "amlogic,meson-g12a-vpu",
570 .data = (void *)&meson_drm_g12a_data },
571 {}
572 };
573 MODULE_DEVICE_TABLE(of, dt_match);
574
575 static const struct dev_pm_ops meson_drv_pm_ops = {
576 SET_SYSTEM_SLEEP_PM_OPS(meson_drv_pm_suspend, meson_drv_pm_resume)
577 };
578
579 static struct platform_driver meson_drm_platform_driver = {
580 .probe = meson_drv_probe,
581 .remove = meson_drv_remove,
582 .shutdown = meson_drv_shutdown,
583 .driver = {
584 .name = "meson-drm",
585 .of_match_table = dt_match,
586 .pm = &meson_drv_pm_ops,
587 },
588 };
589
590 module_platform_driver(meson_drm_platform_driver);
591
592 MODULE_AUTHOR("Jasper St. Pierre <jstpierre@mecheye.net>");
593 MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
594 MODULE_DESCRIPTION(DRIVER_DESC);
595 MODULE_LICENSE("GPL");
596