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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#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
33#define VIDI_REFRESH_TIME (1000 / 50)
34
35
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};
55
56static inline struct vidi_context *encoder_to_vidi(struct drm_encoder *e)
57{
58 return container_of(e, struct vidi_context, encoder);
59}
60
61static 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
86static const uint32_t formats[] = {
87 DRM_FORMAT_XRGB8888,
88 DRM_FORMAT_ARGB8888,
89 DRM_FORMAT_NV12,
90};
91
92static 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
98static 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
111static void vidi_disable_vblank(struct exynos_drm_crtc *crtc)
112{
113}
114
115static 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
129static 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
142static 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
155static 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
164static void vidi_fake_vblank_timer(struct timer_list *t)
165{
166 struct vidi_context *ctx = from_timer(ctx, t, timer);
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
173static 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
188static 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
203 if (!ctx->raw_edid)
204 ctx->raw_edid = (struct edid *)fake_edid_info;
205
206
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
219static DEVICE_ATTR(connection, 0644, vidi_show_connection,
220 vidi_store_connection);
221
222int 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
259
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
274static 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
281
282
283 return ctx->connected ? connector_status_connected :
284 connector_status_disconnected;
285}
286
287static void vidi_connector_destroy(struct drm_connector *connector)
288{
289}
290
291static const struct drm_connector_funcs vidi_connector_funcs = {
292 .fill_modes = drm_helper_probe_single_connector_modes,
293 .detect = vidi_detect,
294 .destroy = vidi_connector_destroy,
295 .reset = drm_atomic_helper_connector_reset,
296 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
297 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
298};
299
300static int vidi_get_modes(struct drm_connector *connector)
301{
302 struct vidi_context *ctx = ctx_from_connector(connector);
303 struct edid *edid;
304 int edid_len;
305
306
307
308
309
310 if (!ctx->raw_edid) {
311 DRM_DEBUG_KMS("raw_edid is null.\n");
312 return -EFAULT;
313 }
314
315 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
316 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
317 if (!edid) {
318 DRM_DEBUG_KMS("failed to allocate edid\n");
319 return -ENOMEM;
320 }
321
322 drm_mode_connector_update_edid_property(connector, edid);
323
324 return drm_add_edid_modes(connector, edid);
325}
326
327static const struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
328 .get_modes = vidi_get_modes,
329};
330
331static int vidi_create_connector(struct drm_encoder *encoder)
332{
333 struct vidi_context *ctx = encoder_to_vidi(encoder);
334 struct drm_connector *connector = &ctx->connector;
335 int ret;
336
337 connector->polled = DRM_CONNECTOR_POLL_HPD;
338
339 ret = drm_connector_init(ctx->drm_dev, connector,
340 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
341 if (ret) {
342 DRM_ERROR("Failed to initialize connector with drm\n");
343 return ret;
344 }
345
346 drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
347 drm_mode_connector_attach_encoder(connector, encoder);
348
349 return 0;
350}
351
352static void exynos_vidi_mode_set(struct drm_encoder *encoder,
353 struct drm_display_mode *mode,
354 struct drm_display_mode *adjusted_mode)
355{
356}
357
358static void exynos_vidi_enable(struct drm_encoder *encoder)
359{
360}
361
362static void exynos_vidi_disable(struct drm_encoder *encoder)
363{
364}
365
366static const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = {
367 .mode_set = exynos_vidi_mode_set,
368 .enable = exynos_vidi_enable,
369 .disable = exynos_vidi_disable,
370};
371
372static const struct drm_encoder_funcs exynos_vidi_encoder_funcs = {
373 .destroy = drm_encoder_cleanup,
374};
375
376static int vidi_bind(struct device *dev, struct device *master, void *data)
377{
378 struct vidi_context *ctx = dev_get_drvdata(dev);
379 struct drm_device *drm_dev = data;
380 struct drm_encoder *encoder = &ctx->encoder;
381 struct exynos_drm_plane *exynos_plane;
382 struct exynos_drm_plane_config plane_config = { 0 };
383 unsigned int i;
384 int ret;
385
386 ctx->drm_dev = drm_dev;
387
388 plane_config.pixel_formats = formats;
389 plane_config.num_pixel_formats = ARRAY_SIZE(formats);
390
391 for (i = 0; i < WINDOWS_NR; i++) {
392 plane_config.zpos = i;
393 plane_config.type = vidi_win_types[i];
394
395 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
396 &plane_config);
397 if (ret)
398 return ret;
399 }
400
401 exynos_plane = &ctx->planes[DEFAULT_WIN];
402 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
403 EXYNOS_DISPLAY_TYPE_VIDI, &vidi_crtc_ops, ctx);
404 if (IS_ERR(ctx->crtc)) {
405 DRM_ERROR("failed to create crtc.\n");
406 return PTR_ERR(ctx->crtc);
407 }
408
409 drm_encoder_init(drm_dev, encoder, &exynos_vidi_encoder_funcs,
410 DRM_MODE_ENCODER_TMDS, NULL);
411
412 drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs);
413
414 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_VIDI);
415 if (ret < 0)
416 return ret;
417
418 ret = vidi_create_connector(encoder);
419 if (ret) {
420 DRM_ERROR("failed to create connector ret = %d\n", ret);
421 drm_encoder_cleanup(encoder);
422 return ret;
423 }
424
425 return 0;
426}
427
428
429static void vidi_unbind(struct device *dev, struct device *master, void *data)
430{
431 struct vidi_context *ctx = dev_get_drvdata(dev);
432
433 del_timer_sync(&ctx->timer);
434}
435
436static const struct component_ops vidi_component_ops = {
437 .bind = vidi_bind,
438 .unbind = vidi_unbind,
439};
440
441static int vidi_probe(struct platform_device *pdev)
442{
443 struct vidi_context *ctx;
444 int ret;
445
446 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
447 if (!ctx)
448 return -ENOMEM;
449
450 ctx->pdev = pdev;
451
452 timer_setup(&ctx->timer, vidi_fake_vblank_timer, 0);
453
454 mutex_init(&ctx->lock);
455
456 platform_set_drvdata(pdev, ctx);
457
458 ret = device_create_file(&pdev->dev, &dev_attr_connection);
459 if (ret < 0) {
460 DRM_ERROR("failed to create connection sysfs.\n");
461 return ret;
462 }
463
464 ret = component_add(&pdev->dev, &vidi_component_ops);
465 if (ret)
466 goto err_remove_file;
467
468 return ret;
469
470err_remove_file:
471 device_remove_file(&pdev->dev, &dev_attr_connection);
472
473 return ret;
474}
475
476static int vidi_remove(struct platform_device *pdev)
477{
478 struct vidi_context *ctx = platform_get_drvdata(pdev);
479
480 if (ctx->raw_edid != (struct edid *)fake_edid_info) {
481 kfree(ctx->raw_edid);
482 ctx->raw_edid = NULL;
483
484 return -EINVAL;
485 }
486
487 component_del(&pdev->dev, &vidi_component_ops);
488
489 return 0;
490}
491
492struct platform_driver vidi_driver = {
493 .probe = vidi_probe,
494 .remove = vidi_remove,
495 .driver = {
496 .name = "exynos-drm-vidi",
497 .owner = THIS_MODULE,
498 },
499};
500
