drivers/gpu/drm/exynos/exynos_drm_encoder.c

   1 /* exynos_drm_encoder.c
   2  *
   3  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   4  * Authors:
   5  *      Inki Dae <inki.dae@samsung.com>
   6  *      Joonyoung Shim <jy0922.shim@samsung.com>
   7  *      Seung-Woo Kim <sw0312.kim@samsung.com>
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice (including the next
  17  * paragraph) shall be included in all copies or substantial portions of the
  18  * Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  23  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  24  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  25  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  26  * OTHER DEALINGS IN THE SOFTWARE.
  27  */
  28
  29 #include "drmP.h"
  30 #include "drm_crtc_helper.h"
  31
  32 #include "exynos_drm_drv.h"
  33 #include "exynos_drm_crtc.h"
  34 #include "exynos_drm_encoder.h"
  35
  36 #define to_exynos_encoder(x)    container_of(x, struct exynos_drm_encoder,\
  37                                 drm_encoder)
  38
  39 /*
  40  * exynos specific encoder structure.
  41  *
  42  * @drm_encoder: encoder object.
  43  * @manager: specific encoder has its own manager to control a hardware
  44  *      appropriately and we can access a hardware drawing on this manager.
  45  * @dpms: store the encoder dpms value.
  46  */
  47 struct exynos_drm_encoder {
  48         struct drm_encoder              drm_encoder;
  49         struct exynos_drm_manager       *manager;
  50         int dpms;
  51 };
  52
  53 static void exynos_drm_display_power(struct drm_encoder *encoder, int mode)
  54 {
  55         struct drm_device *dev = encoder->dev;
  56         struct drm_connector *connector;
  57         struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
  58
  59         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
  60                 if (connector->encoder == encoder) {
  61                         struct exynos_drm_display_ops *display_ops =
  62                                                         manager->display_ops;
  63
  64                         DRM_DEBUG_KMS("connector[%d] dpms[%d]\n",
  65                                         connector->base.id, mode);
  66                         if (display_ops && display_ops->power_on)
  67                                 display_ops->power_on(manager->dev, mode);
  68                 }
  69         }
  70 }
  71
  72 static void exynos_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
  73 {
  74         struct drm_device *dev = encoder->dev;
  75         struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
  76         struct exynos_drm_manager_ops *manager_ops = manager->ops;
  77         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
  78
  79         DRM_DEBUG_KMS("%s, encoder dpms: %d\n", __FILE__, mode);
  80
  81         if (exynos_encoder->dpms == mode) {
  82                 DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n");
  83                 return;
  84         }
  85
  86         mutex_lock(&dev->struct_mutex);
  87
  88         switch (mode) {
  89         case DRM_MODE_DPMS_ON:
  90                 if (manager_ops && manager_ops->apply)
  91                         manager_ops->apply(manager->dev);
  92                 exynos_drm_display_power(encoder, mode);
  93                 exynos_encoder->dpms = mode;
  94                 break;
  95         case DRM_MODE_DPMS_STANDBY:
  96         case DRM_MODE_DPMS_SUSPEND:
  97         case DRM_MODE_DPMS_OFF:
  98                 exynos_drm_display_power(encoder, mode);
  99                 exynos_encoder->dpms = mode;
 100                 break;
 101         default:
 102                 DRM_ERROR("unspecified mode %d\n", mode);
 103                 break;
 104         }
 105
 106         mutex_unlock(&dev->struct_mutex);
 107 }
 108
 109 static bool
 110 exynos_drm_encoder_mode_fixup(struct drm_encoder *encoder,
 111                                struct drm_display_mode *mode,
 112                                struct drm_display_mode *adjusted_mode)
 113 {
 114         DRM_DEBUG_KMS("%s\n", __FILE__);
 115
 116         /* drm framework doesn't check NULL. */
 117
 118         return true;
 119 }
 120
 121 static void exynos_drm_encoder_mode_set(struct drm_encoder *encoder,
 122                                          struct drm_display_mode *mode,
 123                                          struct drm_display_mode *adjusted_mode)
 124 {
 125         struct drm_device *dev = encoder->dev;
 126         struct drm_connector *connector;
 127         struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
 128         struct exynos_drm_manager_ops *manager_ops = manager->ops;
 129         struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
 130         struct exynos_drm_overlay *overlay = get_exynos_drm_overlay(dev,
 131                                                 encoder->crtc);
 132
 133         DRM_DEBUG_KMS("%s\n", __FILE__);
 134
 135         mode = adjusted_mode;
 136
 137         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 138                 if (connector->encoder == encoder) {
 139                         if (manager_ops && manager_ops->mode_set)
 140                                 manager_ops->mode_set(manager->dev, mode);
 141
 142                         if (overlay_ops && overlay_ops->mode_set)
 143                                 overlay_ops->mode_set(manager->dev, overlay);
 144                 }
 145         }
 146 }
 147
 148 static void exynos_drm_encoder_prepare(struct drm_encoder *encoder)
 149 {
 150         DRM_DEBUG_KMS("%s\n", __FILE__);
 151
 152         /* drm framework doesn't check NULL. */
 153 }
 154
 155 static void exynos_drm_encoder_commit(struct drm_encoder *encoder)
 156 {
 157         struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
 158         struct exynos_drm_manager_ops *manager_ops = manager->ops;
 159
 160         DRM_DEBUG_KMS("%s\n", __FILE__);
 161
 162         if (manager_ops && manager_ops->commit)
 163                 manager_ops->commit(manager->dev);
 164 }
 165
 166 static struct drm_crtc *
 167 exynos_drm_encoder_get_crtc(struct drm_encoder *encoder)
 168 {
 169         return encoder->crtc;
 170 }
 171
 172 static struct drm_encoder_helper_funcs exynos_encoder_helper_funcs = {
 173         .dpms           = exynos_drm_encoder_dpms,
 174         .mode_fixup     = exynos_drm_encoder_mode_fixup,
 175         .mode_set       = exynos_drm_encoder_mode_set,
 176         .prepare        = exynos_drm_encoder_prepare,
 177         .commit         = exynos_drm_encoder_commit,
 178         .get_crtc       = exynos_drm_encoder_get_crtc,
 179 };
 180
 181 static void exynos_drm_encoder_destroy(struct drm_encoder *encoder)
 182 {
 183         struct exynos_drm_encoder *exynos_encoder =
 184                 to_exynos_encoder(encoder);
 185
 186         DRM_DEBUG_KMS("%s\n", __FILE__);
 187
 188         exynos_encoder->manager->pipe = -1;
 189
 190         drm_encoder_cleanup(encoder);
 191         kfree(exynos_encoder);
 192 }
 193
 194 static struct drm_encoder_funcs exynos_encoder_funcs = {
 195         .destroy = exynos_drm_encoder_destroy,
 196 };
 197
 198 static unsigned int exynos_drm_encoder_clones(struct drm_encoder *encoder)
 199 {
 200         struct drm_encoder *clone;
 201         struct drm_device *dev = encoder->dev;
 202         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
 203         struct exynos_drm_display_ops *display_ops =
 204                                 exynos_encoder->manager->display_ops;
 205         unsigned int clone_mask = 0;
 206         int cnt = 0;
 207
 208         list_for_each_entry(clone, &dev->mode_config.encoder_list, head) {
 209                 switch (display_ops->type) {
 210                 case EXYNOS_DISPLAY_TYPE_LCD:
 211                 case EXYNOS_DISPLAY_TYPE_HDMI:
 212                         clone_mask |= (1 << (cnt++));
 213                         break;
 214                 default:
 215                         continue;
 216                 }
 217         }
 218
 219         return clone_mask;
 220 }
 221
 222 void exynos_drm_encoder_setup(struct drm_device *dev)
 223 {
 224         struct drm_encoder *encoder;
 225
 226         DRM_DEBUG_KMS("%s\n", __FILE__);
 227
 228         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
 229                 encoder->possible_clones = exynos_drm_encoder_clones(encoder);
 230 }
 231
 232 struct drm_encoder *
 233 exynos_drm_encoder_create(struct drm_device *dev,
 234                            struct exynos_drm_manager *manager,
 235                            unsigned int possible_crtcs)
 236 {
 237         struct drm_encoder *encoder;
 238         struct exynos_drm_encoder *exynos_encoder;
 239
 240         DRM_DEBUG_KMS("%s\n", __FILE__);
 241
 242         if (!manager || !possible_crtcs)
 243                 return NULL;
 244
 245         if (!manager->dev)
 246                 return NULL;
 247
 248         exynos_encoder = kzalloc(sizeof(*exynos_encoder), GFP_KERNEL);
 249         if (!exynos_encoder) {
 250                 DRM_ERROR("failed to allocate encoder\n");
 251                 return NULL;
 252         }
 253
 254         exynos_encoder->dpms = DRM_MODE_DPMS_OFF;
 255         exynos_encoder->manager = manager;
 256         encoder = &exynos_encoder->drm_encoder;
 257         encoder->possible_crtcs = possible_crtcs;
 258
 259         DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
 260
 261         drm_encoder_init(dev, encoder, &exynos_encoder_funcs,
 262                         DRM_MODE_ENCODER_TMDS);
 263
 264         drm_encoder_helper_add(encoder, &exynos_encoder_helper_funcs);
 265
 266         DRM_DEBUG_KMS("encoder has been created\n");
 267
 268         return encoder;
 269 }
 270
 271 struct exynos_drm_manager *exynos_drm_get_manager(struct drm_encoder *encoder)
 272 {
 273         return to_exynos_encoder(encoder)->manager;
 274 }
 275
 276 void exynos_drm_fn_encoder(struct drm_crtc *crtc, void *data,
 277                             void (*fn)(struct drm_encoder *, void *))
 278 {
 279         struct drm_device *dev = crtc->dev;
 280         struct drm_encoder *encoder;
 281         struct exynos_drm_private *private = dev->dev_private;
 282         struct exynos_drm_manager *manager;
 283
 284         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 285                 /*
 286                  * if crtc is detached from encoder, check pipe,
 287                  * otherwise check crtc attached to encoder
 288                  */
 289                 if (!encoder->crtc) {
 290                         manager = to_exynos_encoder(encoder)->manager;
 291                         if (manager->pipe < 0 ||
 292                                         private->crtc[manager->pipe] != crtc)
 293                                 continue;
 294                 } else {
 295                         if (encoder->crtc != crtc)
 296                                 continue;
 297                 }
 298
 299                 fn(encoder, data);
 300         }
 301 }
 302
 303 void exynos_drm_enable_vblank(struct drm_encoder *encoder, void *data)
 304 {
 305         struct exynos_drm_manager *manager =
 306                 to_exynos_encoder(encoder)->manager;
 307         struct exynos_drm_manager_ops *manager_ops = manager->ops;
 308         int crtc = *(int *)data;
 309
 310         if (manager->pipe == -1)
 311                 manager->pipe = crtc;
 312
 313         if (manager_ops->enable_vblank)
 314                 manager_ops->enable_vblank(manager->dev);
 315 }
 316
 317 void exynos_drm_disable_vblank(struct drm_encoder *encoder, void *data)
 318 {
 319         struct exynos_drm_manager *manager =
 320                 to_exynos_encoder(encoder)->manager;
 321         struct exynos_drm_manager_ops *manager_ops = manager->ops;
 322         int crtc = *(int *)data;
 323
 324         if (manager->pipe == -1)
 325                 manager->pipe = crtc;
 326
 327         if (manager_ops->disable_vblank)
 328                 manager_ops->disable_vblank(manager->dev);
 329 }
 330
 331 void exynos_drm_encoder_crtc_plane_commit(struct drm_encoder *encoder,
 332                                           void *data)
 333 {
 334         struct exynos_drm_manager *manager =
 335                 to_exynos_encoder(encoder)->manager;
 336         struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
 337         int zpos = DEFAULT_ZPOS;
 338
 339         if (data)
 340                 zpos = *(int *)data;
 341
 342         if (overlay_ops && overlay_ops->commit)
 343                 overlay_ops->commit(manager->dev, zpos);
 344 }
 345
 346 void exynos_drm_encoder_crtc_commit(struct drm_encoder *encoder, void *data)
 347 {
 348         struct exynos_drm_manager *manager =
 349                 to_exynos_encoder(encoder)->manager;
 350         int crtc = *(int *)data;
 351         int zpos = DEFAULT_ZPOS;
 352
 353         DRM_DEBUG_KMS("%s\n", __FILE__);
 354
 355         /*
 356          * when crtc is detached from encoder, this pipe is used
 357          * to select manager operation
 358          */
 359         manager->pipe = crtc;
 360
 361         exynos_drm_encoder_crtc_plane_commit(encoder, &zpos);
 362 }
 363
 364 void exynos_drm_encoder_dpms_from_crtc(struct drm_encoder *encoder, void *data)
 365 {
 366         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
 367         int mode = *(int *)data;
 368
 369         DRM_DEBUG_KMS("%s\n", __FILE__);
 370
 371         exynos_drm_encoder_dpms(encoder, mode);
 372
 373         exynos_encoder->dpms = mode;
 374 }
 375
 376 void exynos_drm_encoder_crtc_dpms(struct drm_encoder *encoder, void *data)
 377 {
 378         struct drm_device *dev = encoder->dev;
 379         struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
 380         struct exynos_drm_manager *manager = exynos_encoder->manager;
 381         struct exynos_drm_manager_ops *manager_ops = manager->ops;
 382         struct drm_connector *connector;
 383         int mode = *(int *)data;
 384
 385         DRM_DEBUG_KMS("%s\n", __FILE__);
 386
 387         if (manager_ops && manager_ops->dpms)
 388                 manager_ops->dpms(manager->dev, mode);
 389
 390         /*
 391          * set current dpms mode to the connector connected to
 392          * current encoder. connector->dpms would be checked
 393          * at drm_helper_connector_dpms()
 394          */
 395         list_for_each_entry(connector, &dev->mode_config.connector_list, head)
 396                 if (connector->encoder == encoder)
 397                         connector->dpms = mode;
 398
 399         /*
 400          * if this condition is ok then it means that the crtc is already
 401          * detached from encoder and last function for detaching is properly
 402          * done, so clear pipe from manager to prevent repeated call.
 403          */
 404         if (mode > DRM_MODE_DPMS_ON) {
 405                 if (!encoder->crtc)
 406                         manager->pipe = -1;
 407         }
 408 }
 409
 410 void exynos_drm_encoder_crtc_mode_set(struct drm_encoder *encoder, void *data)
 411 {
 412         struct exynos_drm_manager *manager =
 413                 to_exynos_encoder(encoder)->manager;
 414         struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
 415         struct exynos_drm_overlay *overlay = data;
 416
 417         if (overlay_ops && overlay_ops->mode_set)
 418                 overlay_ops->mode_set(manager->dev, overlay);
 419 }
 420
 421 void exynos_drm_encoder_crtc_disable(struct drm_encoder *encoder, void *data)
 422 {
 423         struct exynos_drm_manager *manager =
 424                 to_exynos_encoder(encoder)->manager;
 425         struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
 426         int zpos = DEFAULT_ZPOS;
 427
 428         DRM_DEBUG_KMS("\n");
 429
 430         if (data)
 431                 zpos = *(int *)data;
 432
 433         if (overlay_ops && overlay_ops->disable)
 434                 overlay_ops->disable(manager->dev, zpos);
 435 }
 436
 437 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 438 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 439 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 440 MODULE_DESCRIPTION("Samsung SoC DRM Encoder Driver");
 441 MODULE_LICENSE("GPL");