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13#include <drm/drmP.h>
14
15#include <linux/kernel.h>
16#include <linux/platform_device.h>
17#include <linux/component.h>
18
19#include <drm/exynos_drm.h>
20
21#include <drm/drm_edid.h>
22#include <drm/drm_crtc_helper.h>
23#include <drm/drm_atomic_helper.h>
24
25#include "exynos_drm_drv.h"
26#include "exynos_drm_crtc.h"
27#include "exynos_drm_plane.h"
28#include "exynos_drm_encoder.h"
29#include "exynos_drm_vidi.h"
30
31
32#define WINDOWS_NR 3
33
34#define ctx_from_connector(c) container_of(c, struct vidi_context, \
35 connector)
36
37struct vidi_context {
38 struct exynos_drm_display display;
39 struct platform_device *pdev;
40 struct drm_device *drm_dev;
41 struct exynos_drm_crtc *crtc;
42 struct drm_encoder *encoder;
43 struct drm_connector connector;
44 struct exynos_drm_plane planes[WINDOWS_NR];
45 struct edid *raw_edid;
46 unsigned int clkdiv;
47 unsigned int default_win;
48 unsigned long irq_flags;
49 unsigned int connected;
50 bool vblank_on;
51 bool suspended;
52 bool direct_vblank;
53 struct work_struct work;
54 struct mutex lock;
55 int pipe;
56};
57
58static inline struct vidi_context *display_to_vidi(struct exynos_drm_display *d)
59{
60 return container_of(d, struct vidi_context, display);
61}
62
63static const char fake_edid_info[] = {
64 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
65 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
66 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
67 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
68 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
69 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
70 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
71 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
72 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
73 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
74 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
75 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
76 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
77 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
78 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
79 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
80 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
81 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
82 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
83 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
84 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
85 0x00, 0x00, 0x00, 0x06
86};
87
88static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
89{
90 struct vidi_context *ctx = crtc->ctx;
91
92 if (ctx->suspended)
93 return -EPERM;
94
95 if (!test_and_set_bit(0, &ctx->irq_flags))
96 ctx->vblank_on = true;
97
98 ctx->direct_vblank = true;
99
100
101
102
103
104
105 schedule_work(&ctx->work);
106
107 return 0;
108}
109
110static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
111{
112 struct vidi_context *ctx = crtc->ctx;
113
114 if (ctx->suspended)
115 return;
116
117 if (test_and_clear_bit(0, &ctx->irq_flags))
118 ctx->vblank_on = false;
119}
120
121static void vidi_win_commit(struct exynos_drm_crtc *crtc, unsigned int win)
122{
123 struct vidi_context *ctx = crtc->ctx;
124 struct exynos_drm_plane *plane;
125
126 if (ctx->suspended)
127 return;
128
129 if (win < 0 || win >= WINDOWS_NR)
130 return;
131
132 plane = &ctx->planes[win];
133
134 DRM_DEBUG_KMS("dma_addr = %pad\n", plane->dma_addr);
135
136 if (ctx->vblank_on)
137 schedule_work(&ctx->work);
138}
139
140static void vidi_enable(struct exynos_drm_crtc *crtc)
141{
142 struct vidi_context *ctx = crtc->ctx;
143
144 mutex_lock(&ctx->lock);
145
146 ctx->suspended = false;
147
148
149 if (test_and_clear_bit(0, &ctx->irq_flags))
150 vidi_enable_vblank(ctx->crtc);
151
152 mutex_unlock(&ctx->lock);
153}
154
155static void vidi_disable(struct exynos_drm_crtc *crtc)
156{
157 struct vidi_context *ctx = crtc->ctx;
158
159 mutex_lock(&ctx->lock);
160
161 ctx->suspended = true;
162
163 mutex_unlock(&ctx->lock);
164}
165
166static int vidi_ctx_initialize(struct vidi_context *ctx,
167 struct drm_device *drm_dev)
168{
169 struct exynos_drm_private *priv = drm_dev->dev_private;
170
171 ctx->drm_dev = drm_dev;
172 ctx->pipe = priv->pipe++;
173
174 return 0;
175}
176
177static const struct exynos_drm_crtc_ops vidi_crtc_ops = {
178 .enable = vidi_enable,
179 .disable = vidi_disable,
180 .enable_vblank = vidi_enable_vblank,
181 .disable_vblank = vidi_disable_vblank,
182 .win_commit = vidi_win_commit,
183};
184
185static void vidi_fake_vblank_handler(struct work_struct *work)
186{
187 struct vidi_context *ctx = container_of(work, struct vidi_context,
188 work);
189
190 if (ctx->pipe < 0)
191 return;
192
193
194 usleep_range(16000, 20000);
195
196 mutex_lock(&ctx->lock);
197
198 if (ctx->direct_vblank) {
199 drm_handle_vblank(ctx->drm_dev, ctx->pipe);
200 ctx->direct_vblank = false;
201 mutex_unlock(&ctx->lock);
202 return;
203 }
204
205 mutex_unlock(&ctx->lock);
206
207 exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
208}
209
210static int vidi_show_connection(struct device *dev,
211 struct device_attribute *attr, char *buf)
212{
213 struct vidi_context *ctx = dev_get_drvdata(dev);
214 int rc;
215
216 mutex_lock(&ctx->lock);
217
218 rc = sprintf(buf, "%d\n", ctx->connected);
219
220 mutex_unlock(&ctx->lock);
221
222 return rc;
223}
224
225static int vidi_store_connection(struct device *dev,
226 struct device_attribute *attr,
227 const char *buf, size_t len)
228{
229 struct vidi_context *ctx = dev_get_drvdata(dev);
230 int ret;
231
232 ret = kstrtoint(buf, 0, &ctx->connected);
233 if (ret)
234 return ret;
235
236 if (ctx->connected > 1)
237 return -EINVAL;
238
239
240 if (!ctx->raw_edid)
241 ctx->raw_edid = (struct edid *)fake_edid_info;
242
243
244 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
245 DRM_DEBUG_KMS("edid data is not fake data.\n");
246 return -EINVAL;
247 }
248
249 DRM_DEBUG_KMS("requested connection.\n");
250
251 drm_helper_hpd_irq_event(ctx->drm_dev);
252
253 return len;
254}
255
256static DEVICE_ATTR(connection, 0644, vidi_show_connection,
257 vidi_store_connection);
258
259int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
260 struct drm_file *file_priv)
261{
262 struct vidi_context *ctx = NULL;
263 struct drm_encoder *encoder;
264 struct exynos_drm_display *display;
265 struct drm_exynos_vidi_connection *vidi = data;
266
267 if (!vidi) {
268 DRM_DEBUG_KMS("user data for vidi is null.\n");
269 return -EINVAL;
270 }
271
272 if (vidi->connection > 1) {
273 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
274 return -EINVAL;
275 }
276
277 list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
278 head) {
279 display = exynos_drm_get_display(encoder);
280
281 if (display->type == EXYNOS_DISPLAY_TYPE_VIDI) {
282 ctx = display_to_vidi(display);
283 break;
284 }
285 }
286
287 if (!ctx) {
288 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
289 return -EINVAL;
290 }
291
292 if (ctx->connected == vidi->connection) {
293 DRM_DEBUG_KMS("same connection request.\n");
294 return -EINVAL;
295 }
296
297 if (vidi->connection) {
298 struct edid *raw_edid = (struct edid *)(uint32_t)vidi->edid;
299 if (!drm_edid_is_valid(raw_edid)) {
300 DRM_DEBUG_KMS("edid data is invalid.\n");
301 return -EINVAL;
302 }
303 ctx->raw_edid = drm_edid_duplicate(raw_edid);
304 if (!ctx->raw_edid) {
305 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
306 return -ENOMEM;
307 }
308 } else {
309
310
311
312
313 if (ctx->raw_edid && ctx->raw_edid !=
314 (struct edid *)fake_edid_info) {
315 kfree(ctx->raw_edid);
316 ctx->raw_edid = NULL;
317 }
318 }
319
320 ctx->connected = vidi->connection;
321 drm_helper_hpd_irq_event(ctx->drm_dev);
322
323 return 0;
324}
325
326static enum drm_connector_status vidi_detect(struct drm_connector *connector,
327 bool force)
328{
329 struct vidi_context *ctx = ctx_from_connector(connector);
330
331
332
333
334
335 return ctx->connected ? connector_status_connected :
336 connector_status_disconnected;
337}
338
339static void vidi_connector_destroy(struct drm_connector *connector)
340{
341}
342
343static struct drm_connector_funcs vidi_connector_funcs = {
344 .dpms = drm_atomic_helper_connector_dpms,
345 .fill_modes = drm_helper_probe_single_connector_modes,
346 .detect = vidi_detect,
347 .destroy = vidi_connector_destroy,
348 .reset = drm_atomic_helper_connector_reset,
349 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
350 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
351};
352
353static int vidi_get_modes(struct drm_connector *connector)
354{
355 struct vidi_context *ctx = ctx_from_connector(connector);
356 struct edid *edid;
357 int edid_len;
358
359
360
361
362
363 if (!ctx->raw_edid) {
364 DRM_DEBUG_KMS("raw_edid is null.\n");
365 return -EFAULT;
366 }
367
368 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
369 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
370 if (!edid) {
371 DRM_DEBUG_KMS("failed to allocate edid\n");
372 return -ENOMEM;
373 }
374
375 drm_mode_connector_update_edid_property(connector, edid);
376
377 return drm_add_edid_modes(connector, edid);
378}
379
380static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector)
381{
382 struct vidi_context *ctx = ctx_from_connector(connector);
383
384 return ctx->encoder;
385}
386
387static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
388 .get_modes = vidi_get_modes,
389 .best_encoder = vidi_best_encoder,
390};
391
392static int vidi_create_connector(struct exynos_drm_display *display,
393 struct drm_encoder *encoder)
394{
395 struct vidi_context *ctx = display_to_vidi(display);
396 struct drm_connector *connector = &ctx->connector;
397 int ret;
398
399 ctx->encoder = encoder;
400 connector->polled = DRM_CONNECTOR_POLL_HPD;
401
402 ret = drm_connector_init(ctx->drm_dev, connector,
403 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
404 if (ret) {
405 DRM_ERROR("Failed to initialize connector with drm\n");
406 return ret;
407 }
408
409 drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
410 drm_connector_register(connector);
411 drm_mode_connector_attach_encoder(connector, encoder);
412
413 return 0;
414}
415
416
417static struct exynos_drm_display_ops vidi_display_ops = {
418 .create_connector = vidi_create_connector,
419};
420
421static int vidi_bind(struct device *dev, struct device *master, void *data)
422{
423 struct vidi_context *ctx = dev_get_drvdata(dev);
424 struct drm_device *drm_dev = data;
425 struct exynos_drm_plane *exynos_plane;
426 enum drm_plane_type type;
427 unsigned int zpos;
428 int ret;
429
430 vidi_ctx_initialize(ctx, drm_dev);
431
432 for (zpos = 0; zpos < WINDOWS_NR; zpos++) {
433 type = (zpos == ctx->default_win) ? DRM_PLANE_TYPE_PRIMARY :
434 DRM_PLANE_TYPE_OVERLAY;
435 ret = exynos_plane_init(drm_dev, &ctx->planes[zpos],
436 1 << ctx->pipe, type, zpos);
437 if (ret)
438 return ret;
439 }
440
441 exynos_plane = &ctx->planes[ctx->default_win];
442 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
443 ctx->pipe, EXYNOS_DISPLAY_TYPE_VIDI,
444 &vidi_crtc_ops, ctx);
445 if (IS_ERR(ctx->crtc)) {
446 DRM_ERROR("failed to create crtc.\n");
447 return PTR_ERR(ctx->crtc);
448 }
449
450 ret = exynos_drm_create_enc_conn(drm_dev, &ctx->display);
451 if (ret) {
452 ctx->crtc->base.funcs->destroy(&ctx->crtc->base);
453 return ret;
454 }
455
456 return 0;
457}
458
459
460static void vidi_unbind(struct device *dev, struct device *master, void *data)
461{
462}
463
464static const struct component_ops vidi_component_ops = {
465 .bind = vidi_bind,
466 .unbind = vidi_unbind,
467};
468
469static int vidi_probe(struct platform_device *pdev)
470{
471 struct vidi_context *ctx;
472 int ret;
473
474 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
475 if (!ctx)
476 return -ENOMEM;
477
478 ctx->display.type = EXYNOS_DISPLAY_TYPE_VIDI;
479 ctx->display.ops = &vidi_display_ops;
480 ctx->default_win = 0;
481 ctx->pdev = pdev;
482
483 INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
484
485 mutex_init(&ctx->lock);
486
487 platform_set_drvdata(pdev, ctx);
488
489 ret = device_create_file(&pdev->dev, &dev_attr_connection);
490 if (ret < 0) {
491 DRM_ERROR("failed to create connection sysfs.\n");
492 return ret;
493 }
494
495 ret = component_add(&pdev->dev, &vidi_component_ops);
496 if (ret)
497 goto err_remove_file;
498
499 return ret;
500
501err_remove_file:
502 device_remove_file(&pdev->dev, &dev_attr_connection);
503
504 return ret;
505}
506
507static int vidi_remove(struct platform_device *pdev)
508{
509 struct vidi_context *ctx = platform_get_drvdata(pdev);
510
511 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
512 kfree(ctx->raw_edid);
513 ctx->raw_edid = NULL;
514
515 return -EINVAL;
516 }
517
518 component_del(&pdev->dev, &vidi_component_ops);
519
520 return 0;
521}
522
523struct platform_driver vidi_driver = {
524 .probe = vidi_probe,
525 .remove = vidi_remove,
526 .driver = {
527 .name = "exynos-drm-vidi",
528 .owner = THIS_MODULE,
529 },
530};
531
