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1 | /* exynos_drm_vidi.c | |
2 | * | |
3 | * Copyright (C) 2012 Samsung Electronics Co.Ltd | |
4 | * Authors: | |
5 | * Inki Dae <inki.dae@samsung.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2 of the License, or (at your | |
10 | * option) any later version. | |
11 | * | |
12 | */ | |
13 | #include <drm/drmP.h> | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <linux/platform_device.h> | |
17 | #include <linux/component.h> | |
18 | #include <linux/timer.h> | |
19 | ||
20 | #include <drm/exynos_drm.h> | |
21 | ||
22 | #include <drm/drm_edid.h> | |
23 | #include <drm/drm_crtc_helper.h> | |
24 | #include <drm/drm_atomic_helper.h> | |
25 | ||
26 | #include "exynos_drm_drv.h" | |
27 | #include "exynos_drm_crtc.h" | |
28 | #include "exynos_drm_fb.h" | |
29 | #include "exynos_drm_plane.h" | |
30 | #include "exynos_drm_vidi.h" | |
31 | ||
32 | /* VIDI uses fixed refresh rate of 50Hz */ | |
33 | #define VIDI_REFRESH_TIME (1000 / 50) | |
34 | ||
35 | /* vidi has totally three virtual windows. */ | |
36 | #define WINDOWS_NR 3 | |
37 | ||
38 | #define ctx_from_connector(c) container_of(c, struct vidi_context, \ | |
39 | connector) | |
40 | ||
41 | struct vidi_context { | |
42 | struct drm_encoder encoder; | |
43 | struct platform_device *pdev; | |
44 | struct drm_device *drm_dev; | |
45 | struct exynos_drm_crtc *crtc; | |
46 | struct drm_connector connector; | |
47 | struct exynos_drm_plane planes[WINDOWS_NR]; | |
48 | struct edid *raw_edid; | |
49 | unsigned int clkdiv; | |
50 | unsigned int connected; | |
51 | bool suspended; | |
52 | struct timer_list timer; | |
53 | struct mutex lock; | |
54 | }; | |
55 | ||
56 | static inline struct vidi_context *encoder_to_vidi(struct drm_encoder *e) | |
57 | { | |
58 | return container_of(e, struct vidi_context, encoder); | |
59 | } | |
60 | ||
61 | static const char fake_edid_info[] = { | |
62 | 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05, | |
63 | 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78, | |
64 | 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd, | |
65 | 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, | |
66 | 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00, | |
67 | 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, | |
68 | 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00, | |
69 | 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18, | |
70 | 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, | |
71 | 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47, | |
72 | 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1, | |
73 | 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83, | |
74 | 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00, | |
75 | 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c, | |
76 | 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a, | |
77 | 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00, | |
78 | 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c, | |
79 | 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00, | |
80 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
81 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
82 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
83 | 0x00, 0x00, 0x00, 0x06 | |
84 | }; | |
85 | ||
86 | static const uint32_t formats[] = { | |
87 | DRM_FORMAT_XRGB8888, | |
88 | DRM_FORMAT_ARGB8888, | |
89 | DRM_FORMAT_NV12, | |
90 | }; | |
91 | ||
92 | static const enum drm_plane_type vidi_win_types[WINDOWS_NR] = { | |
93 | DRM_PLANE_TYPE_PRIMARY, | |
94 | DRM_PLANE_TYPE_OVERLAY, | |
95 | DRM_PLANE_TYPE_CURSOR, | |
96 | }; | |
97 | ||
98 | static int vidi_enable_vblank(struct exynos_drm_crtc *crtc) | |
99 | { | |
100 | struct vidi_context *ctx = crtc->ctx; | |
101 | ||
102 | if (ctx->suspended) | |
103 | return -EPERM; | |
104 | ||
105 | mod_timer(&ctx->timer, | |
106 | jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1); | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | static void vidi_disable_vblank(struct exynos_drm_crtc *crtc) | |
112 | { | |
113 | } | |
114 | ||
115 | static void vidi_update_plane(struct exynos_drm_crtc *crtc, | |
116 | struct exynos_drm_plane *plane) | |
117 | { | |
118 | struct drm_plane_state *state = plane->base.state; | |
119 | struct vidi_context *ctx = crtc->ctx; | |
120 | dma_addr_t addr; | |
121 | ||
122 | if (ctx->suspended) | |
123 | return; | |
124 | ||
125 | addr = exynos_drm_fb_dma_addr(state->fb, 0); | |
126 | DRM_DEBUG_KMS("dma_addr = %pad\n", &addr); | |
127 | } | |
128 | ||
129 | static void vidi_enable(struct exynos_drm_crtc *crtc) | |
130 | { | |
131 | struct vidi_context *ctx = crtc->ctx; | |
132 | ||
133 | mutex_lock(&ctx->lock); | |
134 | ||
135 | ctx->suspended = false; | |
136 | ||
137 | mutex_unlock(&ctx->lock); | |
138 | ||
139 | drm_crtc_vblank_on(&crtc->base); | |
140 | } | |
141 | ||
142 | static void vidi_disable(struct exynos_drm_crtc *crtc) | |
143 | { | |
144 | struct vidi_context *ctx = crtc->ctx; | |
145 | ||
146 | drm_crtc_vblank_off(&crtc->base); | |
147 | ||
148 | mutex_lock(&ctx->lock); | |
149 | ||
150 | ctx->suspended = true; | |
151 | ||
152 | mutex_unlock(&ctx->lock); | |
153 | } | |
154 | ||
155 | static const struct exynos_drm_crtc_ops vidi_crtc_ops = { | |
156 | .enable = vidi_enable, | |
157 | .disable = vidi_disable, | |
158 | .enable_vblank = vidi_enable_vblank, | |
159 | .disable_vblank = vidi_disable_vblank, | |
160 | .update_plane = vidi_update_plane, | |
161 | .atomic_flush = exynos_crtc_handle_event, | |
162 | }; | |
163 | ||
164 | static void vidi_fake_vblank_timer(unsigned long arg) | |
165 | { | |
166 | struct vidi_context *ctx = (void *)arg; | |
167 | ||
168 | if (drm_crtc_handle_vblank(&ctx->crtc->base)) | |
169 | mod_timer(&ctx->timer, | |
170 | jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1); | |
171 | } | |
172 | ||
173 | static ssize_t vidi_show_connection(struct device *dev, | |
174 | struct device_attribute *attr, char *buf) | |
175 | { | |
176 | struct vidi_context *ctx = dev_get_drvdata(dev); | |
177 | int rc; | |
178 | ||
179 | mutex_lock(&ctx->lock); | |
180 | ||
181 | rc = sprintf(buf, "%d\n", ctx->connected); | |
182 | ||
183 | mutex_unlock(&ctx->lock); | |
184 | ||
185 | return rc; | |
186 | } | |
187 | ||
188 | static ssize_t vidi_store_connection(struct device *dev, | |
189 | struct device_attribute *attr, | |
190 | const char *buf, size_t len) | |
191 | { | |
192 | struct vidi_context *ctx = dev_get_drvdata(dev); | |
193 | int ret; | |
194 | ||
195 | ret = kstrtoint(buf, 0, &ctx->connected); | |
196 | if (ret) | |
197 | return ret; | |
198 | ||
199 | if (ctx->connected > 1) | |
200 | return -EINVAL; | |
201 | ||
202 | /* use fake edid data for test. */ | |
203 | if (!ctx->raw_edid) | |
204 | ctx->raw_edid = (struct edid *)fake_edid_info; | |
205 | ||
206 | /* if raw_edid isn't same as fake data then it can't be tested. */ | |
207 | if (ctx->raw_edid != (struct edid *)fake_edid_info) { | |
208 | DRM_DEBUG_KMS("edid data is not fake data.\n"); | |
209 | return -EINVAL; | |
210 | } | |
211 | ||
212 | DRM_DEBUG_KMS("requested connection.\n"); | |
213 | ||
214 | drm_helper_hpd_irq_event(ctx->drm_dev); | |
215 | ||
216 | return len; | |
217 | } | |
218 | ||
219 | static DEVICE_ATTR(connection, 0644, vidi_show_connection, | |
220 | vidi_store_connection); | |
221 | ||
222 | int vidi_connection_ioctl(struct drm_device *drm_dev, void *data, | |
223 | struct drm_file *file_priv) | |
224 | { | |
225 | struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev); | |
226 | struct drm_exynos_vidi_connection *vidi = data; | |
227 | ||
228 | if (!vidi) { | |
229 | DRM_DEBUG_KMS("user data for vidi is null.\n"); | |
230 | return -EINVAL; | |
231 | } | |
232 | ||
233 | if (vidi->connection > 1) { | |
234 | DRM_DEBUG_KMS("connection should be 0 or 1.\n"); | |
235 | return -EINVAL; | |
236 | } | |
237 | ||
238 | if (ctx->connected == vidi->connection) { | |
239 | DRM_DEBUG_KMS("same connection request.\n"); | |
240 | return -EINVAL; | |
241 | } | |
242 | ||
243 | if (vidi->connection) { | |
244 | struct edid *raw_edid; | |
245 | ||
246 | raw_edid = (struct edid *)(unsigned long)vidi->edid; | |
247 | if (!drm_edid_is_valid(raw_edid)) { | |
248 | DRM_DEBUG_KMS("edid data is invalid.\n"); | |
249 | return -EINVAL; | |
250 | } | |
251 | ctx->raw_edid = drm_edid_duplicate(raw_edid); | |
252 | if (!ctx->raw_edid) { | |
253 | DRM_DEBUG_KMS("failed to allocate raw_edid.\n"); | |
254 | return -ENOMEM; | |
255 | } | |
256 | } else { | |
257 | /* | |
258 | * with connection = 0, free raw_edid | |
259 | * only if raw edid data isn't same as fake data. | |
260 | */ | |
261 | if (ctx->raw_edid && ctx->raw_edid != | |
262 | (struct edid *)fake_edid_info) { | |
263 | kfree(ctx->raw_edid); | |
264 | ctx->raw_edid = NULL; | |
265 | } | |
266 | } | |
267 | ||
268 | ctx->connected = vidi->connection; | |
269 | drm_helper_hpd_irq_event(ctx->drm_dev); | |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
274 | static enum drm_connector_status vidi_detect(struct drm_connector *connector, | |
275 | bool force) | |
276 | { | |
277 | struct vidi_context *ctx = ctx_from_connector(connector); | |
278 | ||
279 | /* | |
280 | * connection request would come from user side | |
281 | * to do hotplug through specific ioctl. | |
282 | */ | |
283 | return ctx->connected ? connector_status_connected : | |
284 | connector_status_disconnected; | |
285 | } | |
286 | ||
287 | static void vidi_connector_destroy(struct drm_connector *connector) | |
288 | { | |
289 | } | |
290 | ||
291 | static const struct drm_connector_funcs vidi_connector_funcs = { | |
292 | .dpms = drm_atomic_helper_connector_dpms, | |
293 | .fill_modes = drm_helper_probe_single_connector_modes, | |
294 | .detect = vidi_detect, | |
295 | .destroy = vidi_connector_destroy, | |
296 | .reset = drm_atomic_helper_connector_reset, | |
297 | .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, | |
298 | .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, | |
299 | }; | |
300 | ||
301 | static int vidi_get_modes(struct drm_connector *connector) | |
302 | { | |
303 | struct vidi_context *ctx = ctx_from_connector(connector); | |
304 | struct edid *edid; | |
305 | int edid_len; | |
306 | ||
307 | /* | |
308 | * the edid data comes from user side and it would be set | |
309 | * to ctx->raw_edid through specific ioctl. | |
310 | */ | |
311 | if (!ctx->raw_edid) { | |
312 | DRM_DEBUG_KMS("raw_edid is null.\n"); | |
313 | return -EFAULT; | |
314 | } | |
315 | ||
316 | edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH; | |
317 | edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL); | |
318 | if (!edid) { | |
319 | DRM_DEBUG_KMS("failed to allocate edid\n"); | |
320 | return -ENOMEM; | |
321 | } | |
322 | ||
323 | drm_mode_connector_update_edid_property(connector, edid); | |
324 | ||
325 | return drm_add_edid_modes(connector, edid); | |
326 | } | |
327 | ||
328 | static const struct drm_connector_helper_funcs vidi_connector_helper_funcs = { | |
329 | .get_modes = vidi_get_modes, | |
330 | }; | |
331 | ||
332 | static int vidi_create_connector(struct drm_encoder *encoder) | |
333 | { | |
334 | struct vidi_context *ctx = encoder_to_vidi(encoder); | |
335 | struct drm_connector *connector = &ctx->connector; | |
336 | int ret; | |
337 | ||
338 | connector->polled = DRM_CONNECTOR_POLL_HPD; | |
339 | ||
340 | ret = drm_connector_init(ctx->drm_dev, connector, | |
341 | &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL); | |
342 | if (ret) { | |
343 | DRM_ERROR("Failed to initialize connector with drm\n"); | |
344 | return ret; | |
345 | } | |
346 | ||
347 | drm_connector_helper_add(connector, &vidi_connector_helper_funcs); | |
348 | drm_mode_connector_attach_encoder(connector, encoder); | |
349 | ||
350 | return 0; | |
351 | } | |
352 | ||
353 | static void exynos_vidi_mode_set(struct drm_encoder *encoder, | |
354 | struct drm_display_mode *mode, | |
355 | struct drm_display_mode *adjusted_mode) | |
356 | { | |
357 | } | |
358 | ||
359 | static void exynos_vidi_enable(struct drm_encoder *encoder) | |
360 | { | |
361 | } | |
362 | ||
363 | static void exynos_vidi_disable(struct drm_encoder *encoder) | |
364 | { | |
365 | } | |
366 | ||
367 | static const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = { | |
368 | .mode_set = exynos_vidi_mode_set, | |
369 | .enable = exynos_vidi_enable, | |
370 | .disable = exynos_vidi_disable, | |
371 | }; | |
372 | ||
373 | static const struct drm_encoder_funcs exynos_vidi_encoder_funcs = { | |
374 | .destroy = drm_encoder_cleanup, | |
375 | }; | |
376 | ||
377 | static int vidi_bind(struct device *dev, struct device *master, void *data) | |
378 | { | |
379 | struct vidi_context *ctx = dev_get_drvdata(dev); | |
380 | struct drm_device *drm_dev = data; | |
381 | struct drm_encoder *encoder = &ctx->encoder; | |
382 | struct exynos_drm_plane *exynos_plane; | |
383 | struct exynos_drm_plane_config plane_config = { 0 }; | |
384 | unsigned int i; | |
385 | int pipe, ret; | |
386 | ||
387 | ctx->drm_dev = drm_dev; | |
388 | ||
389 | plane_config.pixel_formats = formats; | |
390 | plane_config.num_pixel_formats = ARRAY_SIZE(formats); | |
391 | ||
392 | for (i = 0; i < WINDOWS_NR; i++) { | |
393 | plane_config.zpos = i; | |
394 | plane_config.type = vidi_win_types[i]; | |
395 | ||
396 | ret = exynos_plane_init(drm_dev, &ctx->planes[i], i, | |
397 | &plane_config); | |
398 | if (ret) | |
399 | return ret; | |
400 | } | |
401 | ||
402 | exynos_plane = &ctx->planes[DEFAULT_WIN]; | |
403 | ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base, | |
404 | EXYNOS_DISPLAY_TYPE_VIDI, &vidi_crtc_ops, ctx); | |
405 | if (IS_ERR(ctx->crtc)) { | |
406 | DRM_ERROR("failed to create crtc.\n"); | |
407 | return PTR_ERR(ctx->crtc); | |
408 | } | |
409 | ||
410 | pipe = exynos_drm_crtc_get_pipe_from_type(drm_dev, | |
411 | EXYNOS_DISPLAY_TYPE_VIDI); | |
412 | if (pipe < 0) | |
413 | return pipe; | |
414 | ||
415 | encoder->possible_crtcs = 1 << pipe; | |
416 | ||
417 | DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs); | |
418 | ||
419 | drm_encoder_init(drm_dev, encoder, &exynos_vidi_encoder_funcs, | |
420 | DRM_MODE_ENCODER_TMDS, NULL); | |
421 | ||
422 | drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs); | |
423 | ||
424 | ret = vidi_create_connector(encoder); | |
425 | if (ret) { | |
426 | DRM_ERROR("failed to create connector ret = %d\n", ret); | |
427 | drm_encoder_cleanup(encoder); | |
428 | return ret; | |
429 | } | |
430 | ||
431 | return 0; | |
432 | } | |
433 | ||
434 | ||
435 | static void vidi_unbind(struct device *dev, struct device *master, void *data) | |
436 | { | |
437 | struct vidi_context *ctx = dev_get_drvdata(dev); | |
438 | ||
439 | del_timer_sync(&ctx->timer); | |
440 | } | |
441 | ||
442 | static const struct component_ops vidi_component_ops = { | |
443 | .bind = vidi_bind, | |
444 | .unbind = vidi_unbind, | |
445 | }; | |
446 | ||
447 | static int vidi_probe(struct platform_device *pdev) | |
448 | { | |
449 | struct vidi_context *ctx; | |
450 | int ret; | |
451 | ||
452 | ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); | |
453 | if (!ctx) | |
454 | return -ENOMEM; | |
455 | ||
456 | ctx->pdev = pdev; | |
457 | ||
458 | setup_timer(&ctx->timer, vidi_fake_vblank_timer, (unsigned long)ctx); | |
459 | ||
460 | mutex_init(&ctx->lock); | |
461 | ||
462 | platform_set_drvdata(pdev, ctx); | |
463 | ||
464 | ret = device_create_file(&pdev->dev, &dev_attr_connection); | |
465 | if (ret < 0) { | |
466 | DRM_ERROR("failed to create connection sysfs.\n"); | |
467 | return ret; | |
468 | } | |
469 | ||
470 | ret = component_add(&pdev->dev, &vidi_component_ops); | |
471 | if (ret) | |
472 | goto err_remove_file; | |
473 | ||
474 | return ret; | |
475 | ||
476 | err_remove_file: | |
477 | device_remove_file(&pdev->dev, &dev_attr_connection); | |
478 | ||
479 | return ret; | |
480 | } | |
481 | ||
482 | static int vidi_remove(struct platform_device *pdev) | |
483 | { | |
484 | struct vidi_context *ctx = platform_get_drvdata(pdev); | |
485 | ||
486 | if (ctx->raw_edid != (struct edid *)fake_edid_info) { | |
487 | kfree(ctx->raw_edid); | |
488 | ctx->raw_edid = NULL; | |
489 | ||
490 | return -EINVAL; | |
491 | } | |
492 | ||
493 | component_del(&pdev->dev, &vidi_component_ops); | |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
498 | struct platform_driver vidi_driver = { | |
499 | .probe = vidi_probe, | |
500 | .remove = vidi_remove, | |
501 | .driver = { | |
502 | .name = "exynos-drm-vidi", | |
503 | .owner = THIS_MODULE, | |
504 | }, | |
505 | }; |