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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
41struct 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 int pipe;
55};
56
57static inline struct vidi_context *encoder_to_vidi(struct drm_encoder *e)
58{
59 return container_of(e, struct vidi_context, encoder);
60}
61
62static const char fake_edid_info[] = {
63 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
64 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
65 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
66 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
67 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
68 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
69 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
70 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
71 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
72 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
73 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
74 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
75 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
76 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
77 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
78 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
79 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
80 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 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, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
84 0x00, 0x00, 0x00, 0x06
85};
86
87static const uint32_t formats[] = {
88 DRM_FORMAT_XRGB8888,
89 DRM_FORMAT_ARGB8888,
90 DRM_FORMAT_NV12,
91};
92
93static const enum drm_plane_type vidi_win_types[WINDOWS_NR] = {
94 DRM_PLANE_TYPE_PRIMARY,
95 DRM_PLANE_TYPE_OVERLAY,
96 DRM_PLANE_TYPE_CURSOR,
97};
98
99static int vidi_enable_vblank(struct exynos_drm_crtc *crtc)
100{
101 struct vidi_context *ctx = crtc->ctx;
102
103 if (ctx->suspended)
104 return -EPERM;
105
106 mod_timer(&ctx->timer,
107 jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);
108
109 return 0;
110}
111
112static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
113{
114}
115
116static void vidi_update_plane(struct exynos_drm_crtc *crtc,
117 struct exynos_drm_plane *plane)
118{
119 struct drm_plane_state *state = plane->base.state;
120 struct vidi_context *ctx = crtc->ctx;
121 dma_addr_t addr;
122
123 if (ctx->suspended)
124 return;
125
126 addr = exynos_drm_fb_dma_addr(state->fb, 0);
127 DRM_DEBUG_KMS("dma_addr = %pad\n", &addr);
128}
129
130static void vidi_enable(struct exynos_drm_crtc *crtc)
131{
132 struct vidi_context *ctx = crtc->ctx;
133
134 mutex_lock(&ctx->lock);
135
136 ctx->suspended = false;
137
138 mutex_unlock(&ctx->lock);
139
140 drm_crtc_vblank_on(&crtc->base);
141}
142
143static void vidi_disable(struct exynos_drm_crtc *crtc)
144{
145 struct vidi_context *ctx = crtc->ctx;
146
147 drm_crtc_vblank_off(&crtc->base);
148
149 mutex_lock(&ctx->lock);
150
151 ctx->suspended = true;
152
153 mutex_unlock(&ctx->lock);
154}
155
156static int vidi_ctx_initialize(struct vidi_context *ctx,
157 struct drm_device *drm_dev)
158{
159 struct exynos_drm_private *priv = drm_dev->dev_private;
160
161 ctx->drm_dev = drm_dev;
162 ctx->pipe = priv->pipe++;
163
164 return 0;
165}
166
167static const struct exynos_drm_crtc_ops vidi_crtc_ops = {
168 .enable = vidi_enable,
169 .disable = vidi_disable,
170 .enable_vblank = vidi_enable_vblank,
171 .disable_vblank = vidi_disable_vblank,
172 .update_plane = vidi_update_plane,
173};
174
175static void vidi_fake_vblank_timer(unsigned long arg)
176{
177 struct vidi_context *ctx = (void *)arg;
178
179 if (ctx->pipe < 0)
180 return;
181
182 if (drm_crtc_handle_vblank(&ctx->crtc->base))
183 mod_timer(&ctx->timer,
184 jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1);
185}
186
187static ssize_t vidi_show_connection(struct device *dev,
188 struct device_attribute *attr, char *buf)
189{
190 struct vidi_context *ctx = dev_get_drvdata(dev);
191 int rc;
192
193 mutex_lock(&ctx->lock);
194
195 rc = sprintf(buf, "%d\n", ctx->connected);
196
197 mutex_unlock(&ctx->lock);
198
199 return rc;
200}
201
202static ssize_t vidi_store_connection(struct device *dev,
203 struct device_attribute *attr,
204 const char *buf, size_t len)
205{
206 struct vidi_context *ctx = dev_get_drvdata(dev);
207 int ret;
208
209 ret = kstrtoint(buf, 0, &ctx->connected);
210 if (ret)
211 return ret;
212
213 if (ctx->connected > 1)
214 return -EINVAL;
215
216 /* use fake edid data for test. */
217 if (!ctx->raw_edid)
218 ctx->raw_edid = (struct edid *)fake_edid_info;
219
220 /* if raw_edid isn't same as fake data then it can't be tested. */
221 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
222 DRM_DEBUG_KMS("edid data is not fake data.\n");
223 return -EINVAL;
224 }
225
226 DRM_DEBUG_KMS("requested connection.\n");
227
228 drm_helper_hpd_irq_event(ctx->drm_dev);
229
230 return len;
231}
232
233static DEVICE_ATTR(connection, 0644, vidi_show_connection,
234 vidi_store_connection);
235
236int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
237 struct drm_file *file_priv)
238{
239 struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev);
240 struct drm_exynos_vidi_connection *vidi = data;
241
242 if (!vidi) {
243 DRM_DEBUG_KMS("user data for vidi is null.\n");
244 return -EINVAL;
245 }
246
247 if (vidi->connection > 1) {
248 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
249 return -EINVAL;
250 }
251
252 if (ctx->connected == vidi->connection) {
253 DRM_DEBUG_KMS("same connection request.\n");
254 return -EINVAL;
255 }
256
257 if (vidi->connection) {
258 struct edid *raw_edid;
259
260 raw_edid = (struct edid *)(unsigned long)vidi->edid;
261 if (!drm_edid_is_valid(raw_edid)) {
262 DRM_DEBUG_KMS("edid data is invalid.\n");
263 return -EINVAL;
264 }
265 ctx->raw_edid = drm_edid_duplicate(raw_edid);
266 if (!ctx->raw_edid) {
267 DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
268 return -ENOMEM;
269 }
270 } else {
271 /*
272 * with connection = 0, free raw_edid
273 * only if raw edid data isn't same as fake data.
274 */
275 if (ctx->raw_edid && ctx->raw_edid !=
276 (struct edid *)fake_edid_info) {
277 kfree(ctx->raw_edid);
278 ctx->raw_edid = NULL;
279 }
280 }
281
282 ctx->connected = vidi->connection;
283 drm_helper_hpd_irq_event(ctx->drm_dev);
284
285 return 0;
286}
287
288static enum drm_connector_status vidi_detect(struct drm_connector *connector,
289 bool force)
290{
291 struct vidi_context *ctx = ctx_from_connector(connector);
292
293 /*
294 * connection request would come from user side
295 * to do hotplug through specific ioctl.
296 */
297 return ctx->connected ? connector_status_connected :
298 connector_status_disconnected;
299}
300
301static void vidi_connector_destroy(struct drm_connector *connector)
302{
303}
304
305static const struct drm_connector_funcs vidi_connector_funcs = {
306 .dpms = drm_atomic_helper_connector_dpms,
307 .fill_modes = drm_helper_probe_single_connector_modes,
308 .detect = vidi_detect,
309 .destroy = vidi_connector_destroy,
310 .reset = drm_atomic_helper_connector_reset,
311 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
312 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
313};
314
315static int vidi_get_modes(struct drm_connector *connector)
316{
317 struct vidi_context *ctx = ctx_from_connector(connector);
318 struct edid *edid;
319 int edid_len;
320
321 /*
322 * the edid data comes from user side and it would be set
323 * to ctx->raw_edid through specific ioctl.
324 */
325 if (!ctx->raw_edid) {
326 DRM_DEBUG_KMS("raw_edid is null.\n");
327 return -EFAULT;
328 }
329
330 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
331 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
332 if (!edid) {
333 DRM_DEBUG_KMS("failed to allocate edid\n");
334 return -ENOMEM;
335 }
336
337 drm_mode_connector_update_edid_property(connector, edid);
338
339 return drm_add_edid_modes(connector, edid);
340}
341
342static const struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
343 .get_modes = vidi_get_modes,
344};
345
346static int vidi_create_connector(struct drm_encoder *encoder)
347{
348 struct vidi_context *ctx = encoder_to_vidi(encoder);
349 struct drm_connector *connector = &ctx->connector;
350 int ret;
351
352 connector->polled = DRM_CONNECTOR_POLL_HPD;
353
354 ret = drm_connector_init(ctx->drm_dev, connector,
355 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
356 if (ret) {
357 DRM_ERROR("Failed to initialize connector with drm\n");
358 return ret;
359 }
360
361 drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
362 drm_connector_register(connector);
363 drm_mode_connector_attach_encoder(connector, encoder);
364
365 return 0;
366}
367
368static void exynos_vidi_mode_set(struct drm_encoder *encoder,
369 struct drm_display_mode *mode,
370 struct drm_display_mode *adjusted_mode)
371{
372}
373
374static void exynos_vidi_enable(struct drm_encoder *encoder)
375{
376}
377
378static void exynos_vidi_disable(struct drm_encoder *encoder)
379{
380}
381
382static const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = {
383 .mode_set = exynos_vidi_mode_set,
384 .enable = exynos_vidi_enable,
385 .disable = exynos_vidi_disable,
386};
387
388static const struct drm_encoder_funcs exynos_vidi_encoder_funcs = {
389 .destroy = drm_encoder_cleanup,
390};
391
392static int vidi_bind(struct device *dev, struct device *master, void *data)
393{
394 struct vidi_context *ctx = dev_get_drvdata(dev);
395 struct drm_device *drm_dev = data;
396 struct drm_encoder *encoder = &ctx->encoder;
397 struct exynos_drm_plane *exynos_plane;
398 struct exynos_drm_plane_config plane_config = { 0 };
399 unsigned int i;
400 int pipe, ret;
401
402 vidi_ctx_initialize(ctx, drm_dev);
403
404 plane_config.pixel_formats = formats;
405 plane_config.num_pixel_formats = ARRAY_SIZE(formats);
406
407 for (i = 0; i < WINDOWS_NR; i++) {
408 plane_config.zpos = i;
409 plane_config.type = vidi_win_types[i];
410
411 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
412 1 << ctx->pipe, &plane_config);
413 if (ret)
414 return ret;
415 }
416
417 exynos_plane = &ctx->planes[DEFAULT_WIN];
418 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
419 ctx->pipe, EXYNOS_DISPLAY_TYPE_VIDI,
420 &vidi_crtc_ops, ctx);
421 if (IS_ERR(ctx->crtc)) {
422 DRM_ERROR("failed to create crtc.\n");
423 return PTR_ERR(ctx->crtc);
424 }
425
426 pipe = exynos_drm_crtc_get_pipe_from_type(drm_dev,
427 EXYNOS_DISPLAY_TYPE_VIDI);
428 if (pipe < 0)
429 return pipe;
430
431 encoder->possible_crtcs = 1 << pipe;
432
433 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
434
435 drm_encoder_init(drm_dev, encoder, &exynos_vidi_encoder_funcs,
436 DRM_MODE_ENCODER_TMDS, NULL);
437
438 drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs);
439
440 ret = vidi_create_connector(encoder);
441 if (ret) {
442 DRM_ERROR("failed to create connector ret = %d\n", ret);
443 drm_encoder_cleanup(encoder);
444 return ret;
445 }
446
447 return 0;
448}
449
450
451static void vidi_unbind(struct device *dev, struct device *master, void *data)
452{
453 struct vidi_context *ctx = dev_get_drvdata(dev);
454
455 del_timer_sync(&ctx->timer);
456}
457
458static const struct component_ops vidi_component_ops = {
459 .bind = vidi_bind,
460 .unbind = vidi_unbind,
461};
462
463static int vidi_probe(struct platform_device *pdev)
464{
465 struct vidi_context *ctx;
466 int ret;
467
468 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
469 if (!ctx)
470 return -ENOMEM;
471
472 ctx->pdev = pdev;
473
474 setup_timer(&ctx->timer, vidi_fake_vblank_timer, (unsigned long)ctx);
475
476 mutex_init(&ctx->lock);
477
478 platform_set_drvdata(pdev, ctx);
479
480 ret = device_create_file(&pdev->dev, &dev_attr_connection);
481 if (ret < 0) {
482 DRM_ERROR("failed to create connection sysfs.\n");
483 return ret;
484 }
485
486 ret = component_add(&pdev->dev, &vidi_component_ops);
487 if (ret)
488 goto err_remove_file;
489
490 return ret;
491
492err_remove_file:
493 device_remove_file(&pdev->dev, &dev_attr_connection);
494
495 return ret;
496}
497
498static int vidi_remove(struct platform_device *pdev)
499{
500 struct vidi_context *ctx = platform_get_drvdata(pdev);
501
502 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
503 kfree(ctx->raw_edid);
504 ctx->raw_edid = NULL;
505
506 return -EINVAL;
507 }
508
509 component_del(&pdev->dev, &vidi_component_ops);
510
511 return 0;
512}
513
514struct platform_driver vidi_driver = {
515 .probe = vidi_probe,
516 .remove = vidi_remove,
517 .driver = {
518 .name = "exynos-drm-vidi",
519 .owner = THIS_MODULE,
520 },
521};