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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2015 MediaTek Inc.
4 * Author: YT SHEN <yt.shen@mediatek.com>
5 */
6
7#include <linux/component.h>
8#include <linux/iommu.h>
9#include <linux/module.h>
10#include <linux/of_address.h>
11#include <linux/of_platform.h>
12#include <linux/pm_runtime.h>
13#include <linux/dma-mapping.h>
14
15#include <drm/drm_atomic.h>
16#include <drm/drm_atomic_helper.h>
17#include <drm/drm_drv.h>
18#include <drm/drm_fb_helper.h>
19#include <drm/drm_gem.h>
20#include <drm/drm_gem_cma_helper.h>
21#include <drm/drm_of.h>
22#include <drm/drm_probe_helper.h>
23#include <drm/drm_vblank.h>
24
25#include "mtk_drm_crtc.h"
26#include "mtk_drm_ddp.h"
27#include "mtk_drm_ddp.h"
28#include "mtk_drm_ddp_comp.h"
29#include "mtk_drm_drv.h"
30#include "mtk_drm_fb.h"
31#include "mtk_drm_gem.h"
32
33#define DRIVER_NAME "mediatek"
34#define DRIVER_DESC "Mediatek SoC DRM"
35#define DRIVER_DATE "20150513"
36#define DRIVER_MAJOR 1
37#define DRIVER_MINOR 0
38
39static void mtk_atomic_schedule(struct mtk_drm_private *private,
40 struct drm_atomic_state *state)
41{
42 private->commit.state = state;
43 schedule_work(&private->commit.work);
44}
45
46static void mtk_atomic_complete(struct mtk_drm_private *private,
47 struct drm_atomic_state *state)
48{
49 struct drm_device *drm = private->drm;
50
51 drm_atomic_helper_wait_for_fences(drm, state, false);
52
53 /*
54 * Mediatek drm supports runtime PM, so plane registers cannot be
55 * written when their crtc is disabled.
56 *
57 * The comment for drm_atomic_helper_commit states:
58 * For drivers supporting runtime PM the recommended sequence is
59 *
60 * drm_atomic_helper_commit_modeset_disables(dev, state);
61 * drm_atomic_helper_commit_modeset_enables(dev, state);
62 * drm_atomic_helper_commit_planes(dev, state,
63 * DRM_PLANE_COMMIT_ACTIVE_ONLY);
64 *
65 * See the kerneldoc entries for these three functions for more details.
66 */
67 drm_atomic_helper_commit_modeset_disables(drm, state);
68 drm_atomic_helper_commit_modeset_enables(drm, state);
69 drm_atomic_helper_commit_planes(drm, state,
70 DRM_PLANE_COMMIT_ACTIVE_ONLY);
71
72 drm_atomic_helper_wait_for_vblanks(drm, state);
73
74 drm_atomic_helper_cleanup_planes(drm, state);
75 drm_atomic_state_put(state);
76}
77
78static void mtk_atomic_work(struct work_struct *work)
79{
80 struct mtk_drm_private *private = container_of(work,
81 struct mtk_drm_private, commit.work);
82
83 mtk_atomic_complete(private, private->commit.state);
84}
85
86static int mtk_atomic_commit(struct drm_device *drm,
87 struct drm_atomic_state *state,
88 bool async)
89{
90 struct mtk_drm_private *private = drm->dev_private;
91 int ret;
92
93 ret = drm_atomic_helper_prepare_planes(drm, state);
94 if (ret)
95 return ret;
96
97 mutex_lock(&private->commit.lock);
98 flush_work(&private->commit.work);
99
100 ret = drm_atomic_helper_swap_state(state, true);
101 if (ret) {
102 mutex_unlock(&private->commit.lock);
103 drm_atomic_helper_cleanup_planes(drm, state);
104 return ret;
105 }
106
107 drm_atomic_state_get(state);
108 if (async)
109 mtk_atomic_schedule(private, state);
110 else
111 mtk_atomic_complete(private, state);
112
113 mutex_unlock(&private->commit.lock);
114
115 return 0;
116}
117
118static const struct drm_mode_config_funcs mtk_drm_mode_config_funcs = {
119 .fb_create = mtk_drm_mode_fb_create,
120 .atomic_check = drm_atomic_helper_check,
121 .atomic_commit = mtk_atomic_commit,
122};
123
124static const enum mtk_ddp_comp_id mt2701_mtk_ddp_main[] = {
125 DDP_COMPONENT_OVL0,
126 DDP_COMPONENT_RDMA0,
127 DDP_COMPONENT_COLOR0,
128 DDP_COMPONENT_BLS,
129 DDP_COMPONENT_DSI0,
130};
131
132static const enum mtk_ddp_comp_id mt2701_mtk_ddp_ext[] = {
133 DDP_COMPONENT_RDMA1,
134 DDP_COMPONENT_DPI0,
135};
136
137static const enum mtk_ddp_comp_id mt2712_mtk_ddp_main[] = {
138 DDP_COMPONENT_OVL0,
139 DDP_COMPONENT_COLOR0,
140 DDP_COMPONENT_AAL0,
141 DDP_COMPONENT_OD0,
142 DDP_COMPONENT_RDMA0,
143 DDP_COMPONENT_DPI0,
144 DDP_COMPONENT_PWM0,
145};
146
147static const enum mtk_ddp_comp_id mt2712_mtk_ddp_ext[] = {
148 DDP_COMPONENT_OVL1,
149 DDP_COMPONENT_COLOR1,
150 DDP_COMPONENT_AAL1,
151 DDP_COMPONENT_OD1,
152 DDP_COMPONENT_RDMA1,
153 DDP_COMPONENT_DPI1,
154 DDP_COMPONENT_PWM1,
155};
156
157static const enum mtk_ddp_comp_id mt2712_mtk_ddp_third[] = {
158 DDP_COMPONENT_RDMA2,
159 DDP_COMPONENT_DSI3,
160 DDP_COMPONENT_PWM2,
161};
162
163static const enum mtk_ddp_comp_id mt8173_mtk_ddp_main[] = {
164 DDP_COMPONENT_OVL0,
165 DDP_COMPONENT_COLOR0,
166 DDP_COMPONENT_AAL0,
167 DDP_COMPONENT_OD0,
168 DDP_COMPONENT_RDMA0,
169 DDP_COMPONENT_UFOE,
170 DDP_COMPONENT_DSI0,
171 DDP_COMPONENT_PWM0,
172};
173
174static const enum mtk_ddp_comp_id mt8173_mtk_ddp_ext[] = {
175 DDP_COMPONENT_OVL1,
176 DDP_COMPONENT_COLOR1,
177 DDP_COMPONENT_GAMMA,
178 DDP_COMPONENT_RDMA1,
179 DDP_COMPONENT_DPI0,
180};
181
182static const struct mtk_mmsys_driver_data mt2701_mmsys_driver_data = {
183 .main_path = mt2701_mtk_ddp_main,
184 .main_len = ARRAY_SIZE(mt2701_mtk_ddp_main),
185 .ext_path = mt2701_mtk_ddp_ext,
186 .ext_len = ARRAY_SIZE(mt2701_mtk_ddp_ext),
187 .shadow_register = true,
188};
189
190static const struct mtk_mmsys_driver_data mt2712_mmsys_driver_data = {
191 .main_path = mt2712_mtk_ddp_main,
192 .main_len = ARRAY_SIZE(mt2712_mtk_ddp_main),
193 .ext_path = mt2712_mtk_ddp_ext,
194 .ext_len = ARRAY_SIZE(mt2712_mtk_ddp_ext),
195 .third_path = mt2712_mtk_ddp_third,
196 .third_len = ARRAY_SIZE(mt2712_mtk_ddp_third),
197};
198
199static const struct mtk_mmsys_driver_data mt8173_mmsys_driver_data = {
200 .main_path = mt8173_mtk_ddp_main,
201 .main_len = ARRAY_SIZE(mt8173_mtk_ddp_main),
202 .ext_path = mt8173_mtk_ddp_ext,
203 .ext_len = ARRAY_SIZE(mt8173_mtk_ddp_ext),
204};
205
206static int mtk_drm_kms_init(struct drm_device *drm)
207{
208 struct mtk_drm_private *private = drm->dev_private;
209 struct platform_device *pdev;
210 struct device_node *np;
211 struct device *dma_dev;
212 int ret;
213
214 if (!iommu_present(&platform_bus_type))
215 return -EPROBE_DEFER;
216
217 pdev = of_find_device_by_node(private->mutex_node);
218 if (!pdev) {
219 dev_err(drm->dev, "Waiting for disp-mutex device %pOF\n",
220 private->mutex_node);
221 of_node_put(private->mutex_node);
222 return -EPROBE_DEFER;
223 }
224 private->mutex_dev = &pdev->dev;
225
226 drm_mode_config_init(drm);
227
228 drm->mode_config.min_width = 64;
229 drm->mode_config.min_height = 64;
230
231 /*
232 * set max width and height as default value(4096x4096).
233 * this value would be used to check framebuffer size limitation
234 * at drm_mode_addfb().
235 */
236 drm->mode_config.max_width = 4096;
237 drm->mode_config.max_height = 4096;
238 drm->mode_config.funcs = &mtk_drm_mode_config_funcs;
239
240 ret = component_bind_all(drm->dev, drm);
241 if (ret)
242 goto err_config_cleanup;
243
244 /*
245 * We currently support two fixed data streams, each optional,
246 * and each statically assigned to a crtc:
247 * OVL0 -> COLOR0 -> AAL -> OD -> RDMA0 -> UFOE -> DSI0 ...
248 */
249 ret = mtk_drm_crtc_create(drm, private->data->main_path,
250 private->data->main_len);
251 if (ret < 0)
252 goto err_component_unbind;
253 /* ... and OVL1 -> COLOR1 -> GAMMA -> RDMA1 -> DPI0. */
254 ret = mtk_drm_crtc_create(drm, private->data->ext_path,
255 private->data->ext_len);
256 if (ret < 0)
257 goto err_component_unbind;
258
259 ret = mtk_drm_crtc_create(drm, private->data->third_path,
260 private->data->third_len);
261 if (ret < 0)
262 goto err_component_unbind;
263
264 /* Use OVL device for all DMA memory allocations */
265 np = private->comp_node[private->data->main_path[0]] ?:
266 private->comp_node[private->data->ext_path[0]];
267 pdev = of_find_device_by_node(np);
268 if (!pdev) {
269 ret = -ENODEV;
270 dev_err(drm->dev, "Need at least one OVL device\n");
271 goto err_component_unbind;
272 }
273
274 dma_dev = &pdev->dev;
275 private->dma_dev = dma_dev;
276
277 /*
278 * Configure the DMA segment size to make sure we get contiguous IOVA
279 * when importing PRIME buffers.
280 */
281 if (!dma_dev->dma_parms) {
282 private->dma_parms_allocated = true;
283 dma_dev->dma_parms =
284 devm_kzalloc(drm->dev, sizeof(*dma_dev->dma_parms),
285 GFP_KERNEL);
286 }
287 if (!dma_dev->dma_parms) {
288 ret = -ENOMEM;
289 goto err_component_unbind;
290 }
291
292 ret = dma_set_max_seg_size(dma_dev, (unsigned int)DMA_BIT_MASK(32));
293 if (ret) {
294 dev_err(dma_dev, "Failed to set DMA segment size\n");
295 goto err_unset_dma_parms;
296 }
297
298 /*
299 * We don't use the drm_irq_install() helpers provided by the DRM
300 * core, so we need to set this manually in order to allow the
301 * DRM_IOCTL_WAIT_VBLANK to operate correctly.
302 */
303 drm->irq_enabled = true;
304 ret = drm_vblank_init(drm, MAX_CRTC);
305 if (ret < 0)
306 goto err_unset_dma_parms;
307
308 drm_kms_helper_poll_init(drm);
309 drm_mode_config_reset(drm);
310
311 return 0;
312
313err_unset_dma_parms:
314 if (private->dma_parms_allocated)
315 dma_dev->dma_parms = NULL;
316err_component_unbind:
317 component_unbind_all(drm->dev, drm);
318err_config_cleanup:
319 drm_mode_config_cleanup(drm);
320
321 return ret;
322}
323
324static void mtk_drm_kms_deinit(struct drm_device *drm)
325{
326 struct mtk_drm_private *private = drm->dev_private;
327
328 drm_kms_helper_poll_fini(drm);
329 drm_atomic_helper_shutdown(drm);
330
331 if (private->dma_parms_allocated)
332 private->dma_dev->dma_parms = NULL;
333
334 component_unbind_all(drm->dev, drm);
335 drm_mode_config_cleanup(drm);
336}
337
338static const struct file_operations mtk_drm_fops = {
339 .owner = THIS_MODULE,
340 .open = drm_open,
341 .release = drm_release,
342 .unlocked_ioctl = drm_ioctl,
343 .mmap = mtk_drm_gem_mmap,
344 .poll = drm_poll,
345 .read = drm_read,
346 .compat_ioctl = drm_compat_ioctl,
347};
348
349/*
350 * We need to override this because the device used to import the memory is
351 * not dev->dev, as drm_gem_prime_import() expects.
352 */
353struct drm_gem_object *mtk_drm_gem_prime_import(struct drm_device *dev,
354 struct dma_buf *dma_buf)
355{
356 struct mtk_drm_private *private = dev->dev_private;
357
358 return drm_gem_prime_import_dev(dev, dma_buf, private->dma_dev);
359}
360
361static struct drm_driver mtk_drm_driver = {
362 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
363
364 .gem_free_object_unlocked = mtk_drm_gem_free_object,
365 .gem_vm_ops = &drm_gem_cma_vm_ops,
366 .dumb_create = mtk_drm_gem_dumb_create,
367
368 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
369 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
370 .gem_prime_import = mtk_drm_gem_prime_import,
371 .gem_prime_get_sg_table = mtk_gem_prime_get_sg_table,
372 .gem_prime_import_sg_table = mtk_gem_prime_import_sg_table,
373 .gem_prime_mmap = mtk_drm_gem_mmap_buf,
374 .gem_prime_vmap = mtk_drm_gem_prime_vmap,
375 .gem_prime_vunmap = mtk_drm_gem_prime_vunmap,
376 .fops = &mtk_drm_fops,
377
378 .name = DRIVER_NAME,
379 .desc = DRIVER_DESC,
380 .date = DRIVER_DATE,
381 .major = DRIVER_MAJOR,
382 .minor = DRIVER_MINOR,
383};
384
385static int compare_of(struct device *dev, void *data)
386{
387 return dev->of_node == data;
388}
389
390static int mtk_drm_bind(struct device *dev)
391{
392 struct mtk_drm_private *private = dev_get_drvdata(dev);
393 struct drm_device *drm;
394 int ret;
395
396 drm = drm_dev_alloc(&mtk_drm_driver, dev);
397 if (IS_ERR(drm))
398 return PTR_ERR(drm);
399
400 drm->dev_private = private;
401 private->drm = drm;
402
403 ret = mtk_drm_kms_init(drm);
404 if (ret < 0)
405 goto err_free;
406
407 ret = drm_dev_register(drm, 0);
408 if (ret < 0)
409 goto err_deinit;
410
411 ret = drm_fbdev_generic_setup(drm, 32);
412 if (ret)
413 DRM_ERROR("Failed to initialize fbdev: %d\n", ret);
414
415 return 0;
416
417err_deinit:
418 mtk_drm_kms_deinit(drm);
419err_free:
420 drm_dev_put(drm);
421 return ret;
422}
423
424static void mtk_drm_unbind(struct device *dev)
425{
426 struct mtk_drm_private *private = dev_get_drvdata(dev);
427
428 drm_dev_unregister(private->drm);
429 mtk_drm_kms_deinit(private->drm);
430 drm_dev_put(private->drm);
431 private->num_pipes = 0;
432 private->drm = NULL;
433}
434
435static const struct component_master_ops mtk_drm_ops = {
436 .bind = mtk_drm_bind,
437 .unbind = mtk_drm_unbind,
438};
439
440static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
441 { .compatible = "mediatek,mt2701-disp-ovl",
442 .data = (void *)MTK_DISP_OVL },
443 { .compatible = "mediatek,mt8173-disp-ovl",
444 .data = (void *)MTK_DISP_OVL },
445 { .compatible = "mediatek,mt2701-disp-rdma",
446 .data = (void *)MTK_DISP_RDMA },
447 { .compatible = "mediatek,mt8173-disp-rdma",
448 .data = (void *)MTK_DISP_RDMA },
449 { .compatible = "mediatek,mt8173-disp-wdma",
450 .data = (void *)MTK_DISP_WDMA },
451 { .compatible = "mediatek,mt2701-disp-color",
452 .data = (void *)MTK_DISP_COLOR },
453 { .compatible = "mediatek,mt8173-disp-color",
454 .data = (void *)MTK_DISP_COLOR },
455 { .compatible = "mediatek,mt8173-disp-aal",
456 .data = (void *)MTK_DISP_AAL},
457 { .compatible = "mediatek,mt8173-disp-gamma",
458 .data = (void *)MTK_DISP_GAMMA, },
459 { .compatible = "mediatek,mt8173-disp-ufoe",
460 .data = (void *)MTK_DISP_UFOE },
461 { .compatible = "mediatek,mt2701-dsi",
462 .data = (void *)MTK_DSI },
463 { .compatible = "mediatek,mt8173-dsi",
464 .data = (void *)MTK_DSI },
465 { .compatible = "mediatek,mt2701-dpi",
466 .data = (void *)MTK_DPI },
467 { .compatible = "mediatek,mt8173-dpi",
468 .data = (void *)MTK_DPI },
469 { .compatible = "mediatek,mt2701-disp-mutex",
470 .data = (void *)MTK_DISP_MUTEX },
471 { .compatible = "mediatek,mt2712-disp-mutex",
472 .data = (void *)MTK_DISP_MUTEX },
473 { .compatible = "mediatek,mt8173-disp-mutex",
474 .data = (void *)MTK_DISP_MUTEX },
475 { .compatible = "mediatek,mt2701-disp-pwm",
476 .data = (void *)MTK_DISP_BLS },
477 { .compatible = "mediatek,mt8173-disp-pwm",
478 .data = (void *)MTK_DISP_PWM },
479 { .compatible = "mediatek,mt8173-disp-od",
480 .data = (void *)MTK_DISP_OD },
481 { }
482};
483
484static int mtk_drm_probe(struct platform_device *pdev)
485{
486 struct device *dev = &pdev->dev;
487 struct mtk_drm_private *private;
488 struct resource *mem;
489 struct device_node *node;
490 struct component_match *match = NULL;
491 int ret;
492 int i;
493
494 private = devm_kzalloc(dev, sizeof(*private), GFP_KERNEL);
495 if (!private)
496 return -ENOMEM;
497
498 mutex_init(&private->commit.lock);
499 INIT_WORK(&private->commit.work, mtk_atomic_work);
500 private->data = of_device_get_match_data(dev);
501
502 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
503 private->config_regs = devm_ioremap_resource(dev, mem);
504 if (IS_ERR(private->config_regs)) {
505 ret = PTR_ERR(private->config_regs);
506 dev_err(dev, "Failed to ioremap mmsys-config resource: %d\n",
507 ret);
508 return ret;
509 }
510
511 /* Iterate over sibling DISP function blocks */
512 for_each_child_of_node(dev->of_node->parent, node) {
513 const struct of_device_id *of_id;
514 enum mtk_ddp_comp_type comp_type;
515 int comp_id;
516
517 of_id = of_match_node(mtk_ddp_comp_dt_ids, node);
518 if (!of_id)
519 continue;
520
521 if (!of_device_is_available(node)) {
522 dev_dbg(dev, "Skipping disabled component %pOF\n",
523 node);
524 continue;
525 }
526
527 comp_type = (enum mtk_ddp_comp_type)of_id->data;
528
529 if (comp_type == MTK_DISP_MUTEX) {
530 private->mutex_node = of_node_get(node);
531 continue;
532 }
533
534 comp_id = mtk_ddp_comp_get_id(node, comp_type);
535 if (comp_id < 0) {
536 dev_warn(dev, "Skipping unknown component %pOF\n",
537 node);
538 continue;
539 }
540
541 private->comp_node[comp_id] = of_node_get(node);
542
543 /*
544 * Currently only the COLOR, OVL, RDMA, DSI, and DPI blocks have
545 * separate component platform drivers and initialize their own
546 * DDP component structure. The others are initialized here.
547 */
548 if (comp_type == MTK_DISP_COLOR ||
549 comp_type == MTK_DISP_OVL ||
550 comp_type == MTK_DISP_RDMA ||
551 comp_type == MTK_DSI ||
552 comp_type == MTK_DPI) {
553 dev_info(dev, "Adding component match for %pOF\n",
554 node);
555 drm_of_component_match_add(dev, &match, compare_of,
556 node);
557 } else {
558 struct mtk_ddp_comp *comp;
559
560 comp = devm_kzalloc(dev, sizeof(*comp), GFP_KERNEL);
561 if (!comp) {
562 ret = -ENOMEM;
563 of_node_put(node);
564 goto err_node;
565 }
566
567 ret = mtk_ddp_comp_init(dev, node, comp, comp_id, NULL);
568 if (ret) {
569 of_node_put(node);
570 goto err_node;
571 }
572
573 private->ddp_comp[comp_id] = comp;
574 }
575 }
576
577 if (!private->mutex_node) {
578 dev_err(dev, "Failed to find disp-mutex node\n");
579 ret = -ENODEV;
580 goto err_node;
581 }
582
583 pm_runtime_enable(dev);
584
585 platform_set_drvdata(pdev, private);
586
587 ret = component_master_add_with_match(dev, &mtk_drm_ops, match);
588 if (ret)
589 goto err_pm;
590
591 return 0;
592
593err_pm:
594 pm_runtime_disable(dev);
595err_node:
596 of_node_put(private->mutex_node);
597 for (i = 0; i < DDP_COMPONENT_ID_MAX; i++)
598 of_node_put(private->comp_node[i]);
599 return ret;
600}
601
602static int mtk_drm_remove(struct platform_device *pdev)
603{
604 struct mtk_drm_private *private = platform_get_drvdata(pdev);
605 int i;
606
607 component_master_del(&pdev->dev, &mtk_drm_ops);
608 pm_runtime_disable(&pdev->dev);
609 of_node_put(private->mutex_node);
610 for (i = 0; i < DDP_COMPONENT_ID_MAX; i++)
611 of_node_put(private->comp_node[i]);
612
613 return 0;
614}
615
616#ifdef CONFIG_PM_SLEEP
617static int mtk_drm_sys_suspend(struct device *dev)
618{
619 struct mtk_drm_private *private = dev_get_drvdata(dev);
620 struct drm_device *drm = private->drm;
621 int ret;
622
623 ret = drm_mode_config_helper_suspend(drm);
624 DRM_DEBUG_DRIVER("mtk_drm_sys_suspend\n");
625
626 return ret;
627}
628
629static int mtk_drm_sys_resume(struct device *dev)
630{
631 struct mtk_drm_private *private = dev_get_drvdata(dev);
632 struct drm_device *drm = private->drm;
633 int ret;
634
635 ret = drm_mode_config_helper_resume(drm);
636 DRM_DEBUG_DRIVER("mtk_drm_sys_resume\n");
637
638 return ret;
639}
640#endif
641
642static SIMPLE_DEV_PM_OPS(mtk_drm_pm_ops, mtk_drm_sys_suspend,
643 mtk_drm_sys_resume);
644
645static const struct of_device_id mtk_drm_of_ids[] = {
646 { .compatible = "mediatek,mt2701-mmsys",
647 .data = &mt2701_mmsys_driver_data},
648 { .compatible = "mediatek,mt2712-mmsys",
649 .data = &mt2712_mmsys_driver_data},
650 { .compatible = "mediatek,mt8173-mmsys",
651 .data = &mt8173_mmsys_driver_data},
652 { }
653};
654
655static struct platform_driver mtk_drm_platform_driver = {
656 .probe = mtk_drm_probe,
657 .remove = mtk_drm_remove,
658 .driver = {
659 .name = "mediatek-drm",
660 .of_match_table = mtk_drm_of_ids,
661 .pm = &mtk_drm_pm_ops,
662 },
663};
664
665static struct platform_driver * const mtk_drm_drivers[] = {
666 &mtk_ddp_driver,
667 &mtk_disp_color_driver,
668 &mtk_disp_ovl_driver,
669 &mtk_disp_rdma_driver,
670 &mtk_dpi_driver,
671 &mtk_drm_platform_driver,
672 &mtk_dsi_driver,
673 &mtk_mipi_tx_driver,
674};
675
676static int __init mtk_drm_init(void)
677{
678 return platform_register_drivers(mtk_drm_drivers,
679 ARRAY_SIZE(mtk_drm_drivers));
680}
681
682static void __exit mtk_drm_exit(void)
683{
684 platform_unregister_drivers(mtk_drm_drivers,
685 ARRAY_SIZE(mtk_drm_drivers));
686}
687
688module_init(mtk_drm_init);
689module_exit(mtk_drm_exit);
690
691MODULE_AUTHOR("YT SHEN <yt.shen@mediatek.com>");
692MODULE_DESCRIPTION("Mediatek SoC DRM driver");
693MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2015 MediaTek Inc.
4 * Author: YT SHEN <yt.shen@mediatek.com>
5 */
6
7#include <linux/component.h>
8#include <linux/iommu.h>
9#include <linux/module.h>
10#include <linux/of_address.h>
11#include <linux/of_platform.h>
12#include <linux/pm_runtime.h>
13#include <linux/soc/mediatek/mtk-mmsys.h>
14#include <linux/dma-mapping.h>
15
16#include <drm/drm_atomic.h>
17#include <drm/drm_atomic_helper.h>
18#include <drm/drm_drv.h>
19#include <drm/drm_fb_helper.h>
20#include <drm/drm_fourcc.h>
21#include <drm/drm_gem.h>
22#include <drm/drm_gem_cma_helper.h>
23#include <drm/drm_gem_framebuffer_helper.h>
24#include <drm/drm_of.h>
25#include <drm/drm_probe_helper.h>
26#include <drm/drm_vblank.h>
27
28#include "mtk_drm_crtc.h"
29#include "mtk_drm_ddp.h"
30#include "mtk_drm_ddp_comp.h"
31#include "mtk_drm_drv.h"
32#include "mtk_drm_gem.h"
33
34#define DRIVER_NAME "mediatek"
35#define DRIVER_DESC "Mediatek SoC DRM"
36#define DRIVER_DATE "20150513"
37#define DRIVER_MAJOR 1
38#define DRIVER_MINOR 0
39
40static const struct drm_mode_config_helper_funcs mtk_drm_mode_config_helpers = {
41 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
42};
43
44static struct drm_framebuffer *
45mtk_drm_mode_fb_create(struct drm_device *dev,
46 struct drm_file *file,
47 const struct drm_mode_fb_cmd2 *cmd)
48{
49 const struct drm_format_info *info = drm_get_format_info(dev, cmd);
50
51 if (info->num_planes != 1)
52 return ERR_PTR(-EINVAL);
53
54 return drm_gem_fb_create(dev, file, cmd);
55}
56
57static const struct drm_mode_config_funcs mtk_drm_mode_config_funcs = {
58 .fb_create = mtk_drm_mode_fb_create,
59 .atomic_check = drm_atomic_helper_check,
60 .atomic_commit = drm_atomic_helper_commit,
61};
62
63static const enum mtk_ddp_comp_id mt2701_mtk_ddp_main[] = {
64 DDP_COMPONENT_OVL0,
65 DDP_COMPONENT_RDMA0,
66 DDP_COMPONENT_COLOR0,
67 DDP_COMPONENT_BLS,
68 DDP_COMPONENT_DSI0,
69};
70
71static const enum mtk_ddp_comp_id mt2701_mtk_ddp_ext[] = {
72 DDP_COMPONENT_RDMA1,
73 DDP_COMPONENT_DPI0,
74};
75
76static const enum mtk_ddp_comp_id mt2712_mtk_ddp_main[] = {
77 DDP_COMPONENT_OVL0,
78 DDP_COMPONENT_COLOR0,
79 DDP_COMPONENT_AAL0,
80 DDP_COMPONENT_OD0,
81 DDP_COMPONENT_RDMA0,
82 DDP_COMPONENT_DPI0,
83 DDP_COMPONENT_PWM0,
84};
85
86static const enum mtk_ddp_comp_id mt2712_mtk_ddp_ext[] = {
87 DDP_COMPONENT_OVL1,
88 DDP_COMPONENT_COLOR1,
89 DDP_COMPONENT_AAL1,
90 DDP_COMPONENT_OD1,
91 DDP_COMPONENT_RDMA1,
92 DDP_COMPONENT_DPI1,
93 DDP_COMPONENT_PWM1,
94};
95
96static const enum mtk_ddp_comp_id mt2712_mtk_ddp_third[] = {
97 DDP_COMPONENT_RDMA2,
98 DDP_COMPONENT_DSI3,
99 DDP_COMPONENT_PWM2,
100};
101
102static const enum mtk_ddp_comp_id mt8173_mtk_ddp_main[] = {
103 DDP_COMPONENT_OVL0,
104 DDP_COMPONENT_COLOR0,
105 DDP_COMPONENT_AAL0,
106 DDP_COMPONENT_OD0,
107 DDP_COMPONENT_RDMA0,
108 DDP_COMPONENT_UFOE,
109 DDP_COMPONENT_DSI0,
110 DDP_COMPONENT_PWM0,
111};
112
113static const enum mtk_ddp_comp_id mt8173_mtk_ddp_ext[] = {
114 DDP_COMPONENT_OVL1,
115 DDP_COMPONENT_COLOR1,
116 DDP_COMPONENT_GAMMA,
117 DDP_COMPONENT_RDMA1,
118 DDP_COMPONENT_DPI0,
119};
120
121static const struct mtk_mmsys_driver_data mt2701_mmsys_driver_data = {
122 .main_path = mt2701_mtk_ddp_main,
123 .main_len = ARRAY_SIZE(mt2701_mtk_ddp_main),
124 .ext_path = mt2701_mtk_ddp_ext,
125 .ext_len = ARRAY_SIZE(mt2701_mtk_ddp_ext),
126 .shadow_register = true,
127};
128
129static const struct mtk_mmsys_driver_data mt2712_mmsys_driver_data = {
130 .main_path = mt2712_mtk_ddp_main,
131 .main_len = ARRAY_SIZE(mt2712_mtk_ddp_main),
132 .ext_path = mt2712_mtk_ddp_ext,
133 .ext_len = ARRAY_SIZE(mt2712_mtk_ddp_ext),
134 .third_path = mt2712_mtk_ddp_third,
135 .third_len = ARRAY_SIZE(mt2712_mtk_ddp_third),
136};
137
138static const struct mtk_mmsys_driver_data mt8173_mmsys_driver_data = {
139 .main_path = mt8173_mtk_ddp_main,
140 .main_len = ARRAY_SIZE(mt8173_mtk_ddp_main),
141 .ext_path = mt8173_mtk_ddp_ext,
142 .ext_len = ARRAY_SIZE(mt8173_mtk_ddp_ext),
143};
144
145static int mtk_drm_kms_init(struct drm_device *drm)
146{
147 struct mtk_drm_private *private = drm->dev_private;
148 struct platform_device *pdev;
149 struct device_node *np;
150 struct device *dma_dev;
151 int ret;
152
153 if (!iommu_present(&platform_bus_type))
154 return -EPROBE_DEFER;
155
156 pdev = of_find_device_by_node(private->mutex_node);
157 if (!pdev) {
158 dev_err(drm->dev, "Waiting for disp-mutex device %pOF\n",
159 private->mutex_node);
160 of_node_put(private->mutex_node);
161 return -EPROBE_DEFER;
162 }
163 private->mutex_dev = &pdev->dev;
164
165 ret = drmm_mode_config_init(drm);
166 if (ret)
167 goto put_mutex_dev;
168
169 drm->mode_config.min_width = 64;
170 drm->mode_config.min_height = 64;
171
172 /*
173 * set max width and height as default value(4096x4096).
174 * this value would be used to check framebuffer size limitation
175 * at drm_mode_addfb().
176 */
177 drm->mode_config.max_width = 4096;
178 drm->mode_config.max_height = 4096;
179 drm->mode_config.funcs = &mtk_drm_mode_config_funcs;
180 drm->mode_config.helper_private = &mtk_drm_mode_config_helpers;
181
182 ret = component_bind_all(drm->dev, drm);
183 if (ret)
184 goto put_mutex_dev;
185
186 /*
187 * We currently support two fixed data streams, each optional,
188 * and each statically assigned to a crtc:
189 * OVL0 -> COLOR0 -> AAL -> OD -> RDMA0 -> UFOE -> DSI0 ...
190 */
191 ret = mtk_drm_crtc_create(drm, private->data->main_path,
192 private->data->main_len);
193 if (ret < 0)
194 goto err_component_unbind;
195 /* ... and OVL1 -> COLOR1 -> GAMMA -> RDMA1 -> DPI0. */
196 ret = mtk_drm_crtc_create(drm, private->data->ext_path,
197 private->data->ext_len);
198 if (ret < 0)
199 goto err_component_unbind;
200
201 ret = mtk_drm_crtc_create(drm, private->data->third_path,
202 private->data->third_len);
203 if (ret < 0)
204 goto err_component_unbind;
205
206 /* Use OVL device for all DMA memory allocations */
207 np = private->comp_node[private->data->main_path[0]] ?:
208 private->comp_node[private->data->ext_path[0]];
209 pdev = of_find_device_by_node(np);
210 if (!pdev) {
211 ret = -ENODEV;
212 dev_err(drm->dev, "Need at least one OVL device\n");
213 goto err_component_unbind;
214 }
215
216 dma_dev = &pdev->dev;
217 private->dma_dev = dma_dev;
218
219 /*
220 * Configure the DMA segment size to make sure we get contiguous IOVA
221 * when importing PRIME buffers.
222 */
223 if (!dma_dev->dma_parms) {
224 private->dma_parms_allocated = true;
225 dma_dev->dma_parms =
226 devm_kzalloc(drm->dev, sizeof(*dma_dev->dma_parms),
227 GFP_KERNEL);
228 }
229 if (!dma_dev->dma_parms) {
230 ret = -ENOMEM;
231 goto put_dma_dev;
232 }
233
234 ret = dma_set_max_seg_size(dma_dev, (unsigned int)DMA_BIT_MASK(32));
235 if (ret) {
236 dev_err(dma_dev, "Failed to set DMA segment size\n");
237 goto err_unset_dma_parms;
238 }
239
240 /*
241 * We don't use the drm_irq_install() helpers provided by the DRM
242 * core, so we need to set this manually in order to allow the
243 * DRM_IOCTL_WAIT_VBLANK to operate correctly.
244 */
245 drm->irq_enabled = true;
246 ret = drm_vblank_init(drm, MAX_CRTC);
247 if (ret < 0)
248 goto err_unset_dma_parms;
249
250 drm_kms_helper_poll_init(drm);
251 drm_mode_config_reset(drm);
252
253 return 0;
254
255err_unset_dma_parms:
256 if (private->dma_parms_allocated)
257 dma_dev->dma_parms = NULL;
258put_dma_dev:
259 put_device(private->dma_dev);
260err_component_unbind:
261 component_unbind_all(drm->dev, drm);
262put_mutex_dev:
263 put_device(private->mutex_dev);
264 return ret;
265}
266
267static void mtk_drm_kms_deinit(struct drm_device *drm)
268{
269 struct mtk_drm_private *private = drm->dev_private;
270
271 drm_kms_helper_poll_fini(drm);
272 drm_atomic_helper_shutdown(drm);
273
274 if (private->dma_parms_allocated)
275 private->dma_dev->dma_parms = NULL;
276
277 component_unbind_all(drm->dev, drm);
278}
279
280static const struct file_operations mtk_drm_fops = {
281 .owner = THIS_MODULE,
282 .open = drm_open,
283 .release = drm_release,
284 .unlocked_ioctl = drm_ioctl,
285 .mmap = mtk_drm_gem_mmap,
286 .poll = drm_poll,
287 .read = drm_read,
288 .compat_ioctl = drm_compat_ioctl,
289};
290
291/*
292 * We need to override this because the device used to import the memory is
293 * not dev->dev, as drm_gem_prime_import() expects.
294 */
295struct drm_gem_object *mtk_drm_gem_prime_import(struct drm_device *dev,
296 struct dma_buf *dma_buf)
297{
298 struct mtk_drm_private *private = dev->dev_private;
299
300 return drm_gem_prime_import_dev(dev, dma_buf, private->dma_dev);
301}
302
303static struct drm_driver mtk_drm_driver = {
304 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
305
306 .gem_free_object_unlocked = mtk_drm_gem_free_object,
307 .gem_vm_ops = &drm_gem_cma_vm_ops,
308 .dumb_create = mtk_drm_gem_dumb_create,
309
310 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
311 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
312 .gem_prime_import = mtk_drm_gem_prime_import,
313 .gem_prime_get_sg_table = mtk_gem_prime_get_sg_table,
314 .gem_prime_import_sg_table = mtk_gem_prime_import_sg_table,
315 .gem_prime_mmap = mtk_drm_gem_mmap_buf,
316 .gem_prime_vmap = mtk_drm_gem_prime_vmap,
317 .gem_prime_vunmap = mtk_drm_gem_prime_vunmap,
318 .fops = &mtk_drm_fops,
319
320 .name = DRIVER_NAME,
321 .desc = DRIVER_DESC,
322 .date = DRIVER_DATE,
323 .major = DRIVER_MAJOR,
324 .minor = DRIVER_MINOR,
325};
326
327static int compare_of(struct device *dev, void *data)
328{
329 return dev->of_node == data;
330}
331
332static int mtk_drm_bind(struct device *dev)
333{
334 struct mtk_drm_private *private = dev_get_drvdata(dev);
335 struct drm_device *drm;
336 int ret;
337
338 drm = drm_dev_alloc(&mtk_drm_driver, dev);
339 if (IS_ERR(drm))
340 return PTR_ERR(drm);
341
342 drm->dev_private = private;
343 private->drm = drm;
344
345 ret = mtk_drm_kms_init(drm);
346 if (ret < 0)
347 goto err_free;
348
349 ret = drm_dev_register(drm, 0);
350 if (ret < 0)
351 goto err_deinit;
352
353 drm_fbdev_generic_setup(drm, 32);
354
355 return 0;
356
357err_deinit:
358 mtk_drm_kms_deinit(drm);
359err_free:
360 drm_dev_put(drm);
361 return ret;
362}
363
364static void mtk_drm_unbind(struct device *dev)
365{
366 struct mtk_drm_private *private = dev_get_drvdata(dev);
367
368 drm_dev_unregister(private->drm);
369 mtk_drm_kms_deinit(private->drm);
370 drm_dev_put(private->drm);
371 private->num_pipes = 0;
372 private->drm = NULL;
373}
374
375static const struct component_master_ops mtk_drm_ops = {
376 .bind = mtk_drm_bind,
377 .unbind = mtk_drm_unbind,
378};
379
380static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
381 { .compatible = "mediatek,mt2701-disp-ovl",
382 .data = (void *)MTK_DISP_OVL },
383 { .compatible = "mediatek,mt8173-disp-ovl",
384 .data = (void *)MTK_DISP_OVL },
385 { .compatible = "mediatek,mt2701-disp-rdma",
386 .data = (void *)MTK_DISP_RDMA },
387 { .compatible = "mediatek,mt8173-disp-rdma",
388 .data = (void *)MTK_DISP_RDMA },
389 { .compatible = "mediatek,mt8173-disp-wdma",
390 .data = (void *)MTK_DISP_WDMA },
391 { .compatible = "mediatek,mt2701-disp-color",
392 .data = (void *)MTK_DISP_COLOR },
393 { .compatible = "mediatek,mt8173-disp-color",
394 .data = (void *)MTK_DISP_COLOR },
395 { .compatible = "mediatek,mt8173-disp-aal",
396 .data = (void *)MTK_DISP_AAL},
397 { .compatible = "mediatek,mt8173-disp-gamma",
398 .data = (void *)MTK_DISP_GAMMA, },
399 { .compatible = "mediatek,mt8173-disp-ufoe",
400 .data = (void *)MTK_DISP_UFOE },
401 { .compatible = "mediatek,mt2701-dsi",
402 .data = (void *)MTK_DSI },
403 { .compatible = "mediatek,mt8173-dsi",
404 .data = (void *)MTK_DSI },
405 { .compatible = "mediatek,mt2701-dpi",
406 .data = (void *)MTK_DPI },
407 { .compatible = "mediatek,mt8173-dpi",
408 .data = (void *)MTK_DPI },
409 { .compatible = "mediatek,mt2701-disp-mutex",
410 .data = (void *)MTK_DISP_MUTEX },
411 { .compatible = "mediatek,mt2712-disp-mutex",
412 .data = (void *)MTK_DISP_MUTEX },
413 { .compatible = "mediatek,mt8173-disp-mutex",
414 .data = (void *)MTK_DISP_MUTEX },
415 { .compatible = "mediatek,mt2701-disp-pwm",
416 .data = (void *)MTK_DISP_BLS },
417 { .compatible = "mediatek,mt8173-disp-pwm",
418 .data = (void *)MTK_DISP_PWM },
419 { .compatible = "mediatek,mt8173-disp-od",
420 .data = (void *)MTK_DISP_OD },
421 { }
422};
423
424static const struct of_device_id mtk_drm_of_ids[] = {
425 { .compatible = "mediatek,mt2701-mmsys",
426 .data = &mt2701_mmsys_driver_data},
427 { .compatible = "mediatek,mt2712-mmsys",
428 .data = &mt2712_mmsys_driver_data},
429 { .compatible = "mediatek,mt8173-mmsys",
430 .data = &mt8173_mmsys_driver_data},
431 { }
432};
433
434static int mtk_drm_probe(struct platform_device *pdev)
435{
436 struct device *dev = &pdev->dev;
437 struct device_node *phandle = dev->parent->of_node;
438 const struct of_device_id *of_id;
439 struct mtk_drm_private *private;
440 struct device_node *node;
441 struct component_match *match = NULL;
442 int ret;
443 int i;
444
445 private = devm_kzalloc(dev, sizeof(*private), GFP_KERNEL);
446 if (!private)
447 return -ENOMEM;
448
449 private->mmsys_dev = dev->parent;
450 if (!private->mmsys_dev) {
451 dev_err(dev, "Failed to get MMSYS device\n");
452 return -ENODEV;
453 }
454
455 of_id = of_match_node(mtk_drm_of_ids, phandle);
456 if (!of_id)
457 return -ENODEV;
458
459 private->data = of_id->data;
460
461 /* Iterate over sibling DISP function blocks */
462 for_each_child_of_node(phandle->parent, node) {
463 const struct of_device_id *of_id;
464 enum mtk_ddp_comp_type comp_type;
465 int comp_id;
466
467 of_id = of_match_node(mtk_ddp_comp_dt_ids, node);
468 if (!of_id)
469 continue;
470
471 if (!of_device_is_available(node)) {
472 dev_dbg(dev, "Skipping disabled component %pOF\n",
473 node);
474 continue;
475 }
476
477 comp_type = (enum mtk_ddp_comp_type)of_id->data;
478
479 if (comp_type == MTK_DISP_MUTEX) {
480 private->mutex_node = of_node_get(node);
481 continue;
482 }
483
484 comp_id = mtk_ddp_comp_get_id(node, comp_type);
485 if (comp_id < 0) {
486 dev_warn(dev, "Skipping unknown component %pOF\n",
487 node);
488 continue;
489 }
490
491 private->comp_node[comp_id] = of_node_get(node);
492
493 /*
494 * Currently only the COLOR, OVL, RDMA, DSI, and DPI blocks have
495 * separate component platform drivers and initialize their own
496 * DDP component structure. The others are initialized here.
497 */
498 if (comp_type == MTK_DISP_COLOR ||
499 comp_type == MTK_DISP_OVL ||
500 comp_type == MTK_DISP_OVL_2L ||
501 comp_type == MTK_DISP_RDMA ||
502 comp_type == MTK_DSI ||
503 comp_type == MTK_DPI) {
504 dev_info(dev, "Adding component match for %pOF\n",
505 node);
506 drm_of_component_match_add(dev, &match, compare_of,
507 node);
508 } else {
509 struct mtk_ddp_comp *comp;
510
511 comp = devm_kzalloc(dev, sizeof(*comp), GFP_KERNEL);
512 if (!comp) {
513 ret = -ENOMEM;
514 of_node_put(node);
515 goto err_node;
516 }
517
518 ret = mtk_ddp_comp_init(dev->parent, node, comp,
519 comp_id, NULL);
520 if (ret) {
521 of_node_put(node);
522 goto err_node;
523 }
524
525 private->ddp_comp[comp_id] = comp;
526 }
527 }
528
529 if (!private->mutex_node) {
530 dev_err(dev, "Failed to find disp-mutex node\n");
531 ret = -ENODEV;
532 goto err_node;
533 }
534
535 pm_runtime_enable(dev);
536
537 platform_set_drvdata(pdev, private);
538
539 ret = component_master_add_with_match(dev, &mtk_drm_ops, match);
540 if (ret)
541 goto err_pm;
542
543 return 0;
544
545err_pm:
546 pm_runtime_disable(dev);
547err_node:
548 of_node_put(private->mutex_node);
549 for (i = 0; i < DDP_COMPONENT_ID_MAX; i++) {
550 of_node_put(private->comp_node[i]);
551 if (private->ddp_comp[i]) {
552 put_device(private->ddp_comp[i]->larb_dev);
553 private->ddp_comp[i] = NULL;
554 }
555 }
556 return ret;
557}
558
559static int mtk_drm_remove(struct platform_device *pdev)
560{
561 struct mtk_drm_private *private = platform_get_drvdata(pdev);
562 int i;
563
564 component_master_del(&pdev->dev, &mtk_drm_ops);
565 pm_runtime_disable(&pdev->dev);
566 of_node_put(private->mutex_node);
567 for (i = 0; i < DDP_COMPONENT_ID_MAX; i++)
568 of_node_put(private->comp_node[i]);
569
570 return 0;
571}
572
573#ifdef CONFIG_PM_SLEEP
574static int mtk_drm_sys_suspend(struct device *dev)
575{
576 struct mtk_drm_private *private = dev_get_drvdata(dev);
577 struct drm_device *drm = private->drm;
578 int ret;
579
580 ret = drm_mode_config_helper_suspend(drm);
581
582 return ret;
583}
584
585static int mtk_drm_sys_resume(struct device *dev)
586{
587 struct mtk_drm_private *private = dev_get_drvdata(dev);
588 struct drm_device *drm = private->drm;
589 int ret;
590
591 ret = drm_mode_config_helper_resume(drm);
592
593 return ret;
594}
595#endif
596
597static SIMPLE_DEV_PM_OPS(mtk_drm_pm_ops, mtk_drm_sys_suspend,
598 mtk_drm_sys_resume);
599
600static struct platform_driver mtk_drm_platform_driver = {
601 .probe = mtk_drm_probe,
602 .remove = mtk_drm_remove,
603 .driver = {
604 .name = "mediatek-drm",
605 .pm = &mtk_drm_pm_ops,
606 },
607};
608
609static struct platform_driver * const mtk_drm_drivers[] = {
610 &mtk_ddp_driver,
611 &mtk_disp_color_driver,
612 &mtk_disp_ovl_driver,
613 &mtk_disp_rdma_driver,
614 &mtk_dpi_driver,
615 &mtk_drm_platform_driver,
616 &mtk_mipi_tx_driver,
617 &mtk_dsi_driver,
618};
619
620static int __init mtk_drm_init(void)
621{
622 return platform_register_drivers(mtk_drm_drivers,
623 ARRAY_SIZE(mtk_drm_drivers));
624}
625
626static void __exit mtk_drm_exit(void)
627{
628 platform_unregister_drivers(mtk_drm_drivers,
629 ARRAY_SIZE(mtk_drm_drivers));
630}
631
632module_init(mtk_drm_init);
633module_exit(mtk_drm_exit);
634
635MODULE_AUTHOR("YT SHEN <yt.shen@mediatek.com>");
636MODULE_DESCRIPTION("Mediatek SoC DRM driver");
637MODULE_LICENSE("GPL v2");