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