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13#include <drm/drmP.h>
14
15#include <linux/kernel.h>
16#include <linux/platform_device.h>
17
18#include <drm/exynos_drm.h>
19
20#include <drm/drm_edid.h>
21#include <drm/drm_crtc_helper.h>
22
23#include "exynos_drm_drv.h"
24#include "exynos_drm_crtc.h"
25#include "exynos_drm_encoder.h"
26#include "exynos_drm_vidi.h"
27
28
29#define WINDOWS_NR 3
30
31#define get_vidi_mgr(dev) platform_get_drvdata(to_platform_device(dev))
32#define ctx_from_connector(c) container_of(c, struct vidi_context, \
33 connector)
34
35struct vidi_win_data {
36 unsigned int offset_x;
37 unsigned int offset_y;
38 unsigned int ovl_width;
39 unsigned int ovl_height;
40 unsigned int fb_width;
41 unsigned int fb_height;
42 unsigned int bpp;
43 dma_addr_t dma_addr;
44 unsigned int buf_offsize;
45 unsigned int line_size;
46 bool enabled;
47};
48
49struct vidi_context {
50 struct drm_device *drm_dev;
51 struct drm_crtc *crtc;
52 struct drm_encoder *encoder;
53 struct drm_connector connector;
54 struct exynos_drm_subdrv subdrv;
55 struct vidi_win_data win_data[WINDOWS_NR];
56 struct edid *raw_edid;
57 unsigned int clkdiv;
58 unsigned int default_win;
59 unsigned long irq_flags;
60 unsigned int connected;
61 bool vblank_on;
62 bool suspended;
63 bool direct_vblank;
64 struct work_struct work;
65 struct mutex lock;
66 int pipe;
67};
68
69static const char fake_edid_info[] = {
70 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
71 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
72 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
73 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
74 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
75 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
76 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
77 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
78 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
79 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
80 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
81 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
82 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
83 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
84 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
85 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
86 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
87 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
88 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
89 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
90 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
91 0x00, 0x00, 0x00, 0x06
92};
93
94static void vidi_apply(struct exynos_drm_manager *mgr)
95{
96 struct vidi_context *ctx = mgr->ctx;
97 struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
98 struct vidi_win_data *win_data;
99 int i;
100
101 for (i = 0; i < WINDOWS_NR; i++) {
102 win_data = &ctx->win_data[i];
103 if (win_data->enabled && (mgr_ops && mgr_ops->win_commit))
104 mgr_ops->win_commit(mgr, i);
105 }
106
107 if (mgr_ops && mgr_ops->commit)
108 mgr_ops->commit(mgr);
109}
110
111static void vidi_commit(struct exynos_drm_manager *mgr)
112{
113 struct vidi_context *ctx = mgr->ctx;
114
115 if (ctx->suspended)
116 return;
117}
118
119static int vidi_enable_vblank(struct exynos_drm_manager *mgr)
120{
121 struct vidi_context *ctx = mgr->ctx;
122
123 if (ctx->suspended)
124 return -EPERM;
125
126 if (!test_and_set_bit(0, &ctx->irq_flags))
127 ctx->vblank_on = true;
128
129 ctx->direct_vblank = true;
130
131
132
133
134
135
136 schedule_work(&ctx->work);
137
138 return 0;
139}
140
141static void vidi_disable_vblank(struct exynos_drm_manager *mgr)
142{
143 struct vidi_context *ctx = mgr->ctx;
144
145 if (ctx->suspended)
146 return;
147
148 if (test_and_clear_bit(0, &ctx->irq_flags))
149 ctx->vblank_on = false;
150}
151
152static void vidi_win_mode_set(struct exynos_drm_manager *mgr,
153 struct exynos_drm_overlay *overlay)
154{
155 struct vidi_context *ctx = mgr->ctx;
156 struct vidi_win_data *win_data;
157 int win;
158 unsigned long offset;
159
160 if (!overlay) {
161 DRM_ERROR("overlay is NULL\n");
162 return;
163 }
164
165 win = overlay->zpos;
166 if (win == DEFAULT_ZPOS)
167 win = ctx->default_win;
168
169 if (win < 0 || win >= WINDOWS_NR)
170 return;
171
172 offset = overlay->fb_x * (overlay->bpp >> 3);
173 offset += overlay->fb_y * overlay->pitch;
174
175 DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
176
177 win_data = &ctx->win_data[win];
178
179 win_data->offset_x = overlay->crtc_x;
180 win_data->offset_y = overlay->crtc_y;
181 win_data->ovl_width = overlay->crtc_width;
182 win_data->ovl_height = overlay->crtc_height;
183 win_data->fb_width = overlay->fb_width;
184 win_data->fb_height = overlay->fb_height;
185 win_data->dma_addr = overlay->dma_addr[0] + offset;
186 win_data->bpp = overlay->bpp;
187 win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
188 (overlay->bpp >> 3);
189 win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
190
191
192
193
194
195
196 DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
197 win_data->offset_x, win_data->offset_y);
198 DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
199 win_data->ovl_width, win_data->ovl_height);
200 DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
201 DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
202 overlay->fb_width, overlay->crtc_width);
203}
204
205static void vidi_win_commit(struct exynos_drm_manager *mgr, int zpos)
206{
207 struct vidi_context *ctx = mgr->ctx;
208 struct vidi_win_data *win_data;
209 int win = zpos;
210
211 if (ctx->suspended)
212 return;
213
214 if (win == DEFAULT_ZPOS)
215 win = ctx->default_win;
216
217 if (win < 0 || win >= WINDOWS_NR)
218 return;
219
220 win_data = &ctx->win_data[win];
221
222 win_data->enabled = true;
223
224 DRM_DEBUG_KMS("dma_addr = %pad\n", &win_data->dma_addr);
225
226 if (ctx->vblank_on)
227 schedule_work(&ctx->work);
228}
229
230static void vidi_win_disable(struct exynos_drm_manager *mgr, int zpos)
231{
232 struct vidi_context *ctx = mgr->ctx;
233 struct vidi_win_data *win_data;
234 int win = zpos;
235
236 if (win == DEFAULT_ZPOS)
237 win = ctx->default_win;
238
239 if (win < 0 || win >= WINDOWS_NR)
240 return;
241
242 win_data = &ctx->win_data[win];
243 win_data->enabled = false;
244
245
246}
247
248static int vidi_power_on(struct exynos_drm_manager *mgr, bool enable)
249{
250 struct vidi_context *ctx = mgr->ctx;
251
252 DRM_DEBUG_KMS("%s\n", __FILE__);
253
254 if (enable != false && enable != true)
255 return -EINVAL;
256
257 if (enable) {
258 ctx->suspended = false;
259
260
261 if (test_and_clear_bit(0, &ctx->irq_flags))
262 vidi_enable_vblank(mgr);
263
264 vidi_apply(mgr);
265 } else {
266 ctx->suspended = true;
267 }
268
269 return 0;
270}
271
272static void vidi_dpms(struct exynos_drm_manager *mgr, int mode)
273{
274 struct vidi_context *ctx = mgr->ctx;
275
276 DRM_DEBUG_KMS("%d\n", mode);
277
278 mutex_lock(&ctx->lock);
279
280 switch (mode) {
281 case DRM_MODE_DPMS_ON:
282 vidi_power_on(mgr, true);
283 break;
284 case DRM_MODE_DPMS_STANDBY:
285 case DRM_MODE_DPMS_SUSPEND:
286 case DRM_MODE_DPMS_OFF:
287 vidi_power_on(mgr, false);
288 break;
289 default:
290 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
291 break;
292 }
293
294 mutex_unlock(&ctx->lock);
295}
296
297static int vidi_mgr_initialize(struct exynos_drm_manager *mgr,
298 struct drm_device *drm_dev)
299{
300 struct vidi_context *ctx = mgr->ctx;
301 struct exynos_drm_private *priv = drm_dev->dev_private;
302
303 mgr->drm_dev = ctx->drm_dev = drm_dev;
304 mgr->pipe = ctx->pipe = priv->pipe++;
305
306 return 0;
307}
308
309static struct exynos_drm_manager_ops vidi_manager_ops = {
310 .dpms = vidi_dpms,
311 .commit = vidi_commit,
312 .enable_vblank = vidi_enable_vblank,
313 .disable_vblank = vidi_disable_vblank,
314 .win_mode_set = vidi_win_mode_set,
315 .win_commit = vidi_win_commit,
316 .win_disable = vidi_win_disable,
317};
318
319static struct exynos_drm_manager vidi_manager = {
320 .type = EXYNOS_DISPLAY_TYPE_VIDI,
321 .ops = &vidi_manager_ops,
322};
323
324static void vidi_fake_vblank_handler(struct work_struct *work)
325{
326 struct vidi_context *ctx = container_of(work, struct vidi_context,
327 work);
328
329 if (ctx->pipe < 0)
330 return;
331
332
333 usleep_range(16000, 20000);
334
335 mutex_lock(&ctx->lock);
336
337 if (ctx->direct_vblank) {
338 drm_handle_vblank(ctx->drm_dev, ctx->pipe);
339 ctx->direct_vblank = false;
340 mutex_unlock(&ctx->lock);
341 return;
342 }
343
344 mutex_unlock(&ctx->lock);
345
346 exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
347}
348
349static int vidi_show_connection(struct device *dev,
350 struct device_attribute *attr, char *buf)
351{
352 int rc;
353 struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
354 struct vidi_context *ctx = mgr->ctx;
355
356 mutex_lock(&ctx->lock);
357
358 rc = sprintf(buf, "%d\n", ctx->connected);
359
360 mutex_unlock(&ctx->lock);
361
362 return rc;
363}
364
365static int vidi_store_connection(struct device *dev,
366 struct device_attribute *attr,
367 const char *buf, size_t len)
368{
369 struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
370 struct vidi_context *ctx = mgr->ctx;
371 int ret;
372
373 ret = kstrtoint(buf, 0, &ctx->connected);
374 if (ret)
375 return ret;
376
377 if (ctx->connected > 1)
378 return -EINVAL;
379
380
381 if (!ctx->raw_edid)
382 ctx->raw_edid = (struct edid *)fake_edid_info;
383
384
385 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
386 DRM_DEBUG_KMS("edid data is not fake data.\n");
387 return -EINVAL;
388 }
389
390 DRM_DEBUG_KMS("requested connection.\n");
391
392 drm_helper_hpd_irq_event(ctx->drm_dev);
393
394 return len;
395}
396
397static DEVICE_ATTR(connection, 0644, vidi_show_connection,
398 vidi_store_connection);
399
400int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
401 struct drm_file *file_priv)
402{
403 struct vidi_context *ctx = NULL;
404 struct drm_encoder *encoder;
405 struct exynos_drm_display *display;
406 struct drm_exynos_vidi_connection *vidi = data;
407
408 if (!vidi) {
409 DRM_DEBUG_KMS("user data for vidi is null.\n");
410 return -EINVAL;
411 }
412
413 if (vidi->connection > 1) {
414 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
415 return -EINVAL;
416 }
417
418 list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
419 head) {
420 display = exynos_drm_get_display(encoder);
421
422 if (display->type == EXYNOS_DISPLAY_TYPE_VIDI) {
423 ctx = display->ctx;
424 break;
425 }
426 }
427
428 if (!ctx) {
429 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
430 return -EINVAL;
431 }
432
433 if (ctx->connected == vidi->connection) {
434 DRM_DEBUG_KMS("same connection request.\n");
435 return -EINVAL;
436 }
437
438 if (vidi->connection) {
439 struct edid *raw_edid = (struct edid *)(uint32_t)vidi->edid;
440 if (!drm_edid_is_valid(raw_edid)) {
441 DRM_DEBUG_KMS("edid data is invalid.\n");
442 return -EINVAL;
443 }
444 ctx->raw_edid = drm_edid_duplicate(raw_edid);
445 if (!ctx->raw_edid) {
446 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
447 return -ENOMEM;
448 }
449 } else {
450
451
452
453
454 if (ctx->raw_edid && ctx->raw_edid !=
455 (struct edid *)fake_edid_info) {
456 kfree(ctx->raw_edid);
457 ctx->raw_edid = NULL;
458 }
459 }
460
461 ctx->connected = vidi->connection;
462 drm_helper_hpd_irq_event(ctx->drm_dev);
463
464 return 0;
465}
466
467static enum drm_connector_status vidi_detect(struct drm_connector *connector,
468 bool force)
469{
470 struct vidi_context *ctx = ctx_from_connector(connector);
471
472
473
474
475
476 return ctx->connected ? connector_status_connected :
477 connector_status_disconnected;
478}
479
480static void vidi_connector_destroy(struct drm_connector *connector)
481{
482}
483
484static struct drm_connector_funcs vidi_connector_funcs = {
485 .dpms = drm_helper_connector_dpms,
486 .fill_modes = drm_helper_probe_single_connector_modes,
487 .detect = vidi_detect,
488 .destroy = vidi_connector_destroy,
489};
490
491static int vidi_get_modes(struct drm_connector *connector)
492{
493 struct vidi_context *ctx = ctx_from_connector(connector);
494 struct edid *edid;
495 int edid_len;
496
497
498
499
500
501 if (!ctx->raw_edid) {
502 DRM_DEBUG_KMS("raw_edid is null.\n");
503 return -EFAULT;
504 }
505
506 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
507 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
508 if (!edid) {
509 DRM_DEBUG_KMS("failed to allocate edid\n");
510 return -ENOMEM;
511 }
512
513 drm_mode_connector_update_edid_property(connector, edid);
514
515 return drm_add_edid_modes(connector, edid);
516}
517
518static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector)
519{
520 struct vidi_context *ctx = ctx_from_connector(connector);
521
522 return ctx->encoder;
523}
524
525static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
526 .get_modes = vidi_get_modes,
527 .best_encoder = vidi_best_encoder,
528};
529
530static int vidi_create_connector(struct exynos_drm_display *display,
531 struct drm_encoder *encoder)
532{
533 struct vidi_context *ctx = display->ctx;
534 struct drm_connector *connector = &ctx->connector;
535 int ret;
536
537 ctx->encoder = encoder;
538 connector->polled = DRM_CONNECTOR_POLL_HPD;
539
540 ret = drm_connector_init(ctx->drm_dev, connector,
541 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
542 if (ret) {
543 DRM_ERROR("Failed to initialize connector with drm\n");
544 return ret;
545 }
546
547 drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
548 drm_connector_register(connector);
549 drm_mode_connector_attach_encoder(connector, encoder);
550
551 return 0;
552}
553
554
555static struct exynos_drm_display_ops vidi_display_ops = {
556 .create_connector = vidi_create_connector,
557};
558
559static struct exynos_drm_display vidi_display = {
560 .type = EXYNOS_DISPLAY_TYPE_VIDI,
561 .ops = &vidi_display_ops,
562};
563
564static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
565{
566 struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
567 struct vidi_context *ctx = mgr->ctx;
568 struct drm_crtc *crtc = ctx->crtc;
569 int ret;
570
571 vidi_mgr_initialize(mgr, drm_dev);
572
573 ret = exynos_drm_crtc_create(&vidi_manager);
574 if (ret) {
575 DRM_ERROR("failed to create crtc.\n");
576 return ret;
577 }
578
579 ret = exynos_drm_create_enc_conn(drm_dev, &vidi_display);
580 if (ret) {
581 crtc->funcs->destroy(crtc);
582 DRM_ERROR("failed to create encoder and connector.\n");
583 return ret;
584 }
585
586 return 0;
587}
588
589static int vidi_probe(struct platform_device *pdev)
590{
591 struct exynos_drm_subdrv *subdrv;
592 struct vidi_context *ctx;
593 int ret;
594
595 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
596 if (!ctx)
597 return -ENOMEM;
598
599 ctx->default_win = 0;
600
601 INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
602
603 vidi_manager.ctx = ctx;
604 vidi_display.ctx = ctx;
605
606 mutex_init(&ctx->lock);
607
608 platform_set_drvdata(pdev, &vidi_manager);
609
610 subdrv = &ctx->subdrv;
611 subdrv->dev = &pdev->dev;
612 subdrv->probe = vidi_subdrv_probe;
613
614 ret = exynos_drm_subdrv_register(subdrv);
615 if (ret < 0) {
616 dev_err(&pdev->dev, "failed to register drm vidi device\n");
617 return ret;
618 }
619
620 ret = device_create_file(&pdev->dev, &dev_attr_connection);
621 if (ret < 0) {
622 exynos_drm_subdrv_unregister(subdrv);
623 DRM_INFO("failed to create connection sysfs.\n");
624 }
625
626 return 0;
627}
628
629static int vidi_remove(struct platform_device *pdev)
630{
631 struct exynos_drm_manager *mgr = platform_get_drvdata(pdev);
632 struct vidi_context *ctx = mgr->ctx;
633
634 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
635 kfree(ctx->raw_edid);
636 ctx->raw_edid = NULL;
637
638 return -EINVAL;
639 }
640
641 return 0;
642}
643
644struct platform_driver vidi_driver = {
645 .probe = vidi_probe,
646 .remove = vidi_remove,
647 .driver = {
648 .name = "exynos-drm-vidi",
649 .owner = THIS_MODULE,
650 },
651};
652
653int exynos_drm_probe_vidi(void)
654{
655 struct platform_device *pdev;
656 int ret;
657
658 pdev = platform_device_register_simple("exynos-drm-vidi", -1, NULL, 0);
659 if (IS_ERR(pdev))
660 return PTR_ERR(pdev);
661
662 ret = platform_driver_register(&vidi_driver);
663 if (ret) {
664 platform_device_unregister(pdev);
665 return ret;
666 }
667
668 return ret;
669}
670
671void exynos_drm_remove_vidi(void)
672{
673 struct vidi_context *ctx = vidi_manager.ctx;
674 struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
675 struct platform_device *pdev = to_platform_device(subdrv->dev);
676
677 platform_driver_unregister(&vidi_driver);
678 platform_device_unregister(pdev);
679}
680
