Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/drivers/gpu/drm/exynos/exynos_drm_vidi.c

  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 
 18 #include <drm/exynos_drm.h>
 19 
 20 #include <drm/drm_edid.h>
 21 #include <drm/drm_crtc_helper.h>
 22 
 23 #include "exynos_drm_drv.h"
 24 #include "exynos_drm_crtc.h"
 25 #include "exynos_drm_encoder.h"
 26 #include "exynos_drm_vidi.h"
 27 
 28 /* vidi has totally three virtual windows. */
 29 #define WINDOWS_NR              3
 30 
 31 #define get_vidi_mgr(dev)       platform_get_drvdata(to_platform_device(dev))
 32 #define ctx_from_connector(c)   container_of(c, struct vidi_context, \
 33                                         connector)
 34 
 35 struct vidi_win_data {
 36         unsigned int            offset_x;
 37         unsigned int            offset_y;
 38         unsigned int            ovl_width;
 39         unsigned int            ovl_height;
 40         unsigned int            fb_width;
 41         unsigned int            fb_height;
 42         unsigned int            bpp;
 43         dma_addr_t              dma_addr;
 44         unsigned int            buf_offsize;
 45         unsigned int            line_size;      /* bytes */
 46         bool                    enabled;
 47 };
 48 
 49 struct vidi_context {
 50         struct drm_device               *drm_dev;
 51         struct drm_crtc                 *crtc;
 52         struct drm_encoder              *encoder;
 53         struct drm_connector            connector;
 54         struct exynos_drm_subdrv        subdrv;
 55         struct vidi_win_data            win_data[WINDOWS_NR];
 56         struct edid                     *raw_edid;
 57         unsigned int                    clkdiv;
 58         unsigned int                    default_win;
 59         unsigned long                   irq_flags;
 60         unsigned int                    connected;
 61         bool                            vblank_on;
 62         bool                            suspended;
 63         bool                            direct_vblank;
 64         struct work_struct              work;
 65         struct mutex                    lock;
 66         int                             pipe;
 67 };
 68 
 69 static const char fake_edid_info[] = {
 70         0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05,
 71         0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78,
 72         0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd,
 73         0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
 74         0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00,
 75         0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e,
 76         0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00,
 77         0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
 78         0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
 79         0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47,
 80         0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1,
 81         0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83,
 82         0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00,
 83         0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c,
 84         0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a,
 85         0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00,
 86         0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c,
 87         0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00,
 88         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 89         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 90         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 91         0x00, 0x00, 0x00, 0x06
 92 };
 93 
 94 static void vidi_apply(struct exynos_drm_manager *mgr)
 95 {
 96         struct vidi_context *ctx = mgr->ctx;
 97         struct exynos_drm_manager_ops *mgr_ops = mgr->ops;
 98         struct vidi_win_data *win_data;
 99         int i;
100 
101         for (i = 0; i < WINDOWS_NR; i++) {
102                 win_data = &ctx->win_data[i];
103                 if (win_data->enabled && (mgr_ops && mgr_ops->win_commit))
104                         mgr_ops->win_commit(mgr, i);
105         }
106 
107         if (mgr_ops && mgr_ops->commit)
108                 mgr_ops->commit(mgr);
109 }
110 
111 static void vidi_commit(struct exynos_drm_manager *mgr)
112 {
113         struct vidi_context *ctx = mgr->ctx;
114 
115         if (ctx->suspended)
116                 return;
117 }
118 
119 static int vidi_enable_vblank(struct exynos_drm_manager *mgr)
120 {
121         struct vidi_context *ctx = mgr->ctx;
122 
123         if (ctx->suspended)
124                 return -EPERM;
125 
126         if (!test_and_set_bit(0, &ctx->irq_flags))
127                 ctx->vblank_on = true;
128 
129         ctx->direct_vblank = true;
130 
131         /*
132          * in case of page flip request, vidi_finish_pageflip function
133          * will not be called because direct_vblank is true and then
134          * that function will be called by manager_ops->win_commit callback
135          */
136         schedule_work(&ctx->work);
137 
138         return 0;
139 }
140 
141 static void vidi_disable_vblank(struct exynos_drm_manager *mgr)
142 {
143         struct vidi_context *ctx = mgr->ctx;
144 
145         if (ctx->suspended)
146                 return;
147 
148         if (test_and_clear_bit(0, &ctx->irq_flags))
149                 ctx->vblank_on = false;
150 }
151 
152 static void vidi_win_mode_set(struct exynos_drm_manager *mgr,
153                         struct exynos_drm_overlay *overlay)
154 {
155         struct vidi_context *ctx = mgr->ctx;
156         struct vidi_win_data *win_data;
157         int win;
158         unsigned long offset;
159 
160         if (!overlay) {
161                 DRM_ERROR("overlay is NULL\n");
162                 return;
163         }
164 
165         win = overlay->zpos;
166         if (win == DEFAULT_ZPOS)
167                 win = ctx->default_win;
168 
169         if (win < 0 || win >= WINDOWS_NR)
170                 return;
171 
172         offset = overlay->fb_x * (overlay->bpp >> 3);
173         offset += overlay->fb_y * overlay->pitch;
174 
175         DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
176 
177         win_data = &ctx->win_data[win];
178 
179         win_data->offset_x = overlay->crtc_x;
180         win_data->offset_y = overlay->crtc_y;
181         win_data->ovl_width = overlay->crtc_width;
182         win_data->ovl_height = overlay->crtc_height;
183         win_data->fb_width = overlay->fb_width;
184         win_data->fb_height = overlay->fb_height;
185         win_data->dma_addr = overlay->dma_addr[0] + offset;
186         win_data->bpp = overlay->bpp;
187         win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
188                                 (overlay->bpp >> 3);
189         win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
190 
191         /*
192          * some parts of win_data should be transferred to user side
193          * through specific ioctl.
194          */
195 
196         DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
197                         win_data->offset_x, win_data->offset_y);
198         DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
199                         win_data->ovl_width, win_data->ovl_height);
200         DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
201         DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
202                         overlay->fb_width, overlay->crtc_width);
203 }
204 
205 static void vidi_win_commit(struct exynos_drm_manager *mgr, int zpos)
206 {
207         struct vidi_context *ctx = mgr->ctx;
208         struct vidi_win_data *win_data;
209         int win = zpos;
210 
211         if (ctx->suspended)
212                 return;
213 
214         if (win == DEFAULT_ZPOS)
215                 win = ctx->default_win;
216 
217         if (win < 0 || win >= WINDOWS_NR)
218                 return;
219 
220         win_data = &ctx->win_data[win];
221 
222         win_data->enabled = true;
223 
224         DRM_DEBUG_KMS("dma_addr = %pad\n", &win_data->dma_addr);
225 
226         if (ctx->vblank_on)
227                 schedule_work(&ctx->work);
228 }
229 
230 static void vidi_win_disable(struct exynos_drm_manager *mgr, int zpos)
231 {
232         struct vidi_context *ctx = mgr->ctx;
233         struct vidi_win_data *win_data;
234         int win = zpos;
235 
236         if (win == DEFAULT_ZPOS)
237                 win = ctx->default_win;
238 
239         if (win < 0 || win >= WINDOWS_NR)
240                 return;
241 
242         win_data = &ctx->win_data[win];
243         win_data->enabled = false;
244 
245         /* TODO. */
246 }
247 
248 static int vidi_power_on(struct exynos_drm_manager *mgr, bool enable)
249 {
250         struct vidi_context *ctx = mgr->ctx;
251 
252         DRM_DEBUG_KMS("%s\n", __FILE__);
253 
254         if (enable != false && enable != true)
255                 return -EINVAL;
256 
257         if (enable) {
258                 ctx->suspended = false;
259 
260                 /* if vblank was enabled status, enable it again. */
261                 if (test_and_clear_bit(0, &ctx->irq_flags))
262                         vidi_enable_vblank(mgr);
263 
264                 vidi_apply(mgr);
265         } else {
266                 ctx->suspended = true;
267         }
268 
269         return 0;
270 }
271 
272 static void vidi_dpms(struct exynos_drm_manager *mgr, int mode)
273 {
274         struct vidi_context *ctx = mgr->ctx;
275 
276         DRM_DEBUG_KMS("%d\n", mode);
277 
278         mutex_lock(&ctx->lock);
279 
280         switch (mode) {
281         case DRM_MODE_DPMS_ON:
282                 vidi_power_on(mgr, true);
283                 break;
284         case DRM_MODE_DPMS_STANDBY:
285         case DRM_MODE_DPMS_SUSPEND:
286         case DRM_MODE_DPMS_OFF:
287                 vidi_power_on(mgr, false);
288                 break;
289         default:
290                 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
291                 break;
292         }
293 
294         mutex_unlock(&ctx->lock);
295 }
296 
297 static int vidi_mgr_initialize(struct exynos_drm_manager *mgr,
298                         struct drm_device *drm_dev)
299 {
300         struct vidi_context *ctx = mgr->ctx;
301         struct exynos_drm_private *priv = drm_dev->dev_private;
302 
303         mgr->drm_dev = ctx->drm_dev = drm_dev;
304         mgr->pipe = ctx->pipe = priv->pipe++;
305 
306         /*
307          * enable drm irq mode.
308          * - with irq_enabled = 1, we can use the vblank feature.
309          *
310          * P.S. note that we wouldn't use drm irq handler but
311          *      just specific driver own one instead because
312          *      drm framework supports only one irq handler.
313          */
314         drm_dev->irq_enabled = 1;
315 
316         /*
317          * with vblank_disable_allowed = 1, vblank interrupt will be disabled
318          * by drm timer once a current process gives up ownership of
319          * vblank event.(after drm_vblank_put function is called)
320          */
321         drm_dev->vblank_disable_allowed = 1;
322 
323         return 0;
324 }
325 
326 static struct exynos_drm_manager_ops vidi_manager_ops = {
327         .dpms = vidi_dpms,
328         .commit = vidi_commit,
329         .enable_vblank = vidi_enable_vblank,
330         .disable_vblank = vidi_disable_vblank,
331         .win_mode_set = vidi_win_mode_set,
332         .win_commit = vidi_win_commit,
333         .win_disable = vidi_win_disable,
334 };
335 
336 static struct exynos_drm_manager vidi_manager = {
337         .type = EXYNOS_DISPLAY_TYPE_VIDI,
338         .ops = &vidi_manager_ops,
339 };
340 
341 static void vidi_fake_vblank_handler(struct work_struct *work)
342 {
343         struct vidi_context *ctx = container_of(work, struct vidi_context,
344                                         work);
345 
346         if (ctx->pipe < 0)
347                 return;
348 
349         /* refresh rate is about 50Hz. */
350         usleep_range(16000, 20000);
351 
352         mutex_lock(&ctx->lock);
353 
354         if (ctx->direct_vblank) {
355                 drm_handle_vblank(ctx->drm_dev, ctx->pipe);
356                 ctx->direct_vblank = false;
357                 mutex_unlock(&ctx->lock);
358                 return;
359         }
360 
361         mutex_unlock(&ctx->lock);
362 
363         exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
364 }
365 
366 static int vidi_show_connection(struct device *dev,
367                                 struct device_attribute *attr, char *buf)
368 {
369         int rc;
370         struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
371         struct vidi_context *ctx = mgr->ctx;
372 
373         mutex_lock(&ctx->lock);
374 
375         rc = sprintf(buf, "%d\n", ctx->connected);
376 
377         mutex_unlock(&ctx->lock);
378 
379         return rc;
380 }
381 
382 static int vidi_store_connection(struct device *dev,
383                                 struct device_attribute *attr,
384                                 const char *buf, size_t len)
385 {
386         struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
387         struct vidi_context *ctx = mgr->ctx;
388         int ret;
389 
390         ret = kstrtoint(buf, 0, &ctx->connected);
391         if (ret)
392                 return ret;
393 
394         if (ctx->connected > 1)
395                 return -EINVAL;
396 
397         /* use fake edid data for test. */
398         if (!ctx->raw_edid)
399                 ctx->raw_edid = (struct edid *)fake_edid_info;
400 
401         /* if raw_edid isn't same as fake data then it can't be tested. */
402         if (ctx->raw_edid != (struct edid *)fake_edid_info) {
403                 DRM_DEBUG_KMS("edid data is not fake data.\n");
404                 return -EINVAL;
405         }
406 
407         DRM_DEBUG_KMS("requested connection.\n");
408 
409         drm_helper_hpd_irq_event(ctx->drm_dev);
410 
411         return len;
412 }
413 
414 static DEVICE_ATTR(connection, 0644, vidi_show_connection,
415                         vidi_store_connection);
416 
417 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data,
418                                 struct drm_file *file_priv)
419 {
420         struct vidi_context *ctx = NULL;
421         struct drm_encoder *encoder;
422         struct exynos_drm_display *display;
423         struct drm_exynos_vidi_connection *vidi = data;
424 
425         if (!vidi) {
426                 DRM_DEBUG_KMS("user data for vidi is null.\n");
427                 return -EINVAL;
428         }
429 
430         if (vidi->connection > 1) {
431                 DRM_DEBUG_KMS("connection should be 0 or 1.\n");
432                 return -EINVAL;
433         }
434 
435         list_for_each_entry(encoder, &drm_dev->mode_config.encoder_list,
436                                                                 head) {
437                 display = exynos_drm_get_display(encoder);
438 
439                 if (display->type == EXYNOS_DISPLAY_TYPE_VIDI) {
440                         ctx = display->ctx;
441                         break;
442                 }
443         }
444 
445         if (!ctx) {
446                 DRM_DEBUG_KMS("not found virtual device type encoder.\n");
447                 return -EINVAL;
448         }
449 
450         if (ctx->connected == vidi->connection) {
451                 DRM_DEBUG_KMS("same connection request.\n");
452                 return -EINVAL;
453         }
454 
455         if (vidi->connection) {
456                 struct edid *raw_edid  = (struct edid *)(uint32_t)vidi->edid;
457                 if (!drm_edid_is_valid(raw_edid)) {
458                         DRM_DEBUG_KMS("edid data is invalid.\n");
459                         return -EINVAL;
460                 }
461                 ctx->raw_edid = drm_edid_duplicate(raw_edid);
462                 if (!ctx->raw_edid) {
463                         DRM_DEBUG_KMS("failed to allocate raw_edid.\n");
464                         return -ENOMEM;
465                 }
466         } else {
467                 /*
468                  * with connection = 0, free raw_edid
469                  * only if raw edid data isn't same as fake data.
470                  */
471                 if (ctx->raw_edid && ctx->raw_edid !=
472                                 (struct edid *)fake_edid_info) {
473                         kfree(ctx->raw_edid);
474                         ctx->raw_edid = NULL;
475                 }
476         }
477 
478         ctx->connected = vidi->connection;
479         drm_helper_hpd_irq_event(ctx->drm_dev);
480 
481         return 0;
482 }
483 
484 static enum drm_connector_status vidi_detect(struct drm_connector *connector,
485                         bool force)
486 {
487         struct vidi_context *ctx = ctx_from_connector(connector);
488 
489         /*
490          * connection request would come from user side
491          * to do hotplug through specific ioctl.
492          */
493         return ctx->connected ? connector_status_connected :
494                         connector_status_disconnected;
495 }
496 
497 static void vidi_connector_destroy(struct drm_connector *connector)
498 {
499 }
500 
501 static struct drm_connector_funcs vidi_connector_funcs = {
502         .dpms = drm_helper_connector_dpms,
503         .fill_modes = drm_helper_probe_single_connector_modes,
504         .detect = vidi_detect,
505         .destroy = vidi_connector_destroy,
506 };
507 
508 static int vidi_get_modes(struct drm_connector *connector)
509 {
510         struct vidi_context *ctx = ctx_from_connector(connector);
511         struct edid *edid;
512         int edid_len;
513 
514         /*
515          * the edid data comes from user side and it would be set
516          * to ctx->raw_edid through specific ioctl.
517          */
518         if (!ctx->raw_edid) {
519                 DRM_DEBUG_KMS("raw_edid is null.\n");
520                 return -EFAULT;
521         }
522 
523         edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH;
524         edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL);
525         if (!edid) {
526                 DRM_DEBUG_KMS("failed to allocate edid\n");
527                 return -ENOMEM;
528         }
529 
530         drm_mode_connector_update_edid_property(connector, edid);
531 
532         return drm_add_edid_modes(connector, edid);
533 }
534 
535 static struct drm_encoder *vidi_best_encoder(struct drm_connector *connector)
536 {
537         struct vidi_context *ctx = ctx_from_connector(connector);
538 
539         return ctx->encoder;
540 }
541 
542 static struct drm_connector_helper_funcs vidi_connector_helper_funcs = {
543         .get_modes = vidi_get_modes,
544         .best_encoder = vidi_best_encoder,
545 };
546 
547 static int vidi_create_connector(struct exynos_drm_display *display,
548                                 struct drm_encoder *encoder)
549 {
550         struct vidi_context *ctx = display->ctx;
551         struct drm_connector *connector = &ctx->connector;
552         int ret;
553 
554         ctx->encoder = encoder;
555         connector->polled = DRM_CONNECTOR_POLL_HPD;
556 
557         ret = drm_connector_init(ctx->drm_dev, connector,
558                         &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
559         if (ret) {
560                 DRM_ERROR("Failed to initialize connector with drm\n");
561                 return ret;
562         }
563 
564         drm_connector_helper_add(connector, &vidi_connector_helper_funcs);
565         drm_sysfs_connector_add(connector);
566         drm_mode_connector_attach_encoder(connector, encoder);
567 
568         return 0;
569 }
570 
571 
572 static struct exynos_drm_display_ops vidi_display_ops = {
573         .create_connector = vidi_create_connector,
574 };
575 
576 static struct exynos_drm_display vidi_display = {
577         .type = EXYNOS_DISPLAY_TYPE_VIDI,
578         .ops = &vidi_display_ops,
579 };
580 
581 static int vidi_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
582 {
583         struct exynos_drm_manager *mgr = get_vidi_mgr(dev);
584         struct vidi_context *ctx = mgr->ctx;
585         struct drm_crtc *crtc = ctx->crtc;
586         int ret;
587 
588         vidi_mgr_initialize(mgr, drm_dev);
589 
590         ret = exynos_drm_crtc_create(&vidi_manager);
591         if (ret) {
592                 DRM_ERROR("failed to create crtc.\n");
593                 return ret;
594         }
595 
596         ret = exynos_drm_create_enc_conn(drm_dev, &vidi_display);
597         if (ret) {
598                 crtc->funcs->destroy(crtc);
599                 DRM_ERROR("failed to create encoder and connector.\n");
600                 return ret;
601         }
602 
603         return 0;
604 }
605 
606 static int vidi_probe(struct platform_device *pdev)
607 {
608         struct exynos_drm_subdrv *subdrv;
609         struct vidi_context *ctx;
610         int ret;
611 
612         ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
613         if (!ctx)
614                 return -ENOMEM;
615 
616         ctx->default_win = 0;
617 
618         INIT_WORK(&ctx->work, vidi_fake_vblank_handler);
619 
620         vidi_manager.ctx = ctx;
621         vidi_display.ctx = ctx;
622 
623         mutex_init(&ctx->lock);
624 
625         platform_set_drvdata(pdev, &vidi_manager);
626 
627         subdrv = &ctx->subdrv;
628         subdrv->dev = &pdev->dev;
629         subdrv->probe = vidi_subdrv_probe;
630 
631         ret = exynos_drm_subdrv_register(subdrv);
632         if (ret < 0) {
633                 dev_err(&pdev->dev, "failed to register drm vidi device\n");
634                 return ret;
635         }
636 
637         ret = device_create_file(&pdev->dev, &dev_attr_connection);
638         if (ret < 0) {
639                 exynos_drm_subdrv_unregister(subdrv);
640                 DRM_INFO("failed to create connection sysfs.\n");
641         }
642 
643         return 0;
644 }
645 
646 static int vidi_remove(struct platform_device *pdev)
647 {
648         struct exynos_drm_manager *mgr = platform_get_drvdata(pdev);
649         struct vidi_context *ctx = mgr->ctx;
650         struct drm_encoder *encoder = ctx->encoder;
651         struct drm_crtc *crtc = mgr->crtc;
652 
653         if (ctx->raw_edid != (struct edid *)fake_edid_info) {
654                 kfree(ctx->raw_edid);
655                 ctx->raw_edid = NULL;
656 
657                 return -EINVAL;
658         }
659 
660         crtc->funcs->destroy(crtc);
661         encoder->funcs->destroy(encoder);
662         drm_connector_cleanup(&ctx->connector);
663 
664         return 0;
665 }
666 
667 struct platform_driver vidi_driver = {
668         .probe          = vidi_probe,
669         .remove         = vidi_remove,
670         .driver         = {
671                 .name   = "exynos-drm-vidi",
672                 .owner  = THIS_MODULE,
673         },
674 };
675 
676 int exynos_drm_probe_vidi(void)
677 {
678         struct platform_device *pdev;
679         int ret;
680 
681         pdev = platform_device_register_simple("exynos-drm-vidi", -1, NULL, 0);
682         if (IS_ERR(pdev))
683                 return PTR_ERR(pdev);
684 
685         ret = platform_driver_register(&vidi_driver);
686         if (ret) {
687                 platform_device_unregister(pdev);
688                 return ret;
689         }
690 
691         return ret;
692 }
693 
694 void exynos_drm_remove_vidi(void)
695 {
696         struct vidi_context *ctx = vidi_manager.ctx;
697         struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
698         struct platform_device *pdev = to_platform_device(subdrv->dev);
699 
700         platform_driver_unregister(&vidi_driver);
701         platform_device_unregister(pdev);
702 }
703 

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