Version:  2.0.40 2.2.26 2.4.37 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 3.17 3.18 3.19 4.0

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

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us