drivers/gpu/drm/omapdrm/dss/manager-sysfs.c

   1 /*
   2  * Copyright (C) 2009 Nokia Corporation
   3  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
   4  *
   5  * Some code and ideas taken from drivers/video/omap/ driver
   6  * by Imre Deak.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License version 2 as published by
  10  * the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #define DSS_SUBSYS_NAME "MANAGER"
  22
  23 #include <linux/kernel.h>
  24 #include <linux/slab.h>
  25 #include <linux/module.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/jiffies.h>
  28
  29 #include <video/omapdss.h>
  30
  31 #include "dss.h"
  32 #include "dss_features.h"
  33
  34 static ssize_t manager_name_show(struct omap_overlay_manager *mgr, char *buf)
  35 {
  36         return snprintf(buf, PAGE_SIZE, "%s\n", mgr->name);
  37 }
  38
  39 static ssize_t manager_display_show(struct omap_overlay_manager *mgr, char *buf)
  40 {
  41         struct omap_dss_device *dssdev = mgr->get_device(mgr);
  42
  43         return snprintf(buf, PAGE_SIZE, "%s\n", dssdev ?
  44                         dssdev->name : "<none>");
  45 }
  46
  47 static int manager_display_match(struct omap_dss_device *dssdev, void *data)
  48 {
  49         const char *str = data;
  50
  51         return sysfs_streq(dssdev->name, str);
  52 }
  53
  54 static ssize_t manager_display_store(struct omap_overlay_manager *mgr,
  55                 const char *buf, size_t size)
  56 {
  57         int r = 0;
  58         size_t len = size;
  59         struct omap_dss_device *dssdev = NULL;
  60         struct omap_dss_device *old_dssdev;
  61
  62         if (buf[size-1] == '\n')
  63                 --len;
  64
  65         if (len > 0)
  66                 dssdev = omap_dss_find_device((void *)buf,
  67                         manager_display_match);
  68
  69         if (len > 0 && dssdev == NULL)
  70                 return -EINVAL;
  71
  72         if (dssdev) {
  73                 DSSDBG("display %s found\n", dssdev->name);
  74
  75                 if (omapdss_device_is_connected(dssdev)) {
  76                         DSSERR("new display is already connected\n");
  77                         r = -EINVAL;
  78                         goto put_device;
  79                 }
  80
  81                 if (omapdss_device_is_enabled(dssdev)) {
  82                         DSSERR("new display is not disabled\n");
  83                         r = -EINVAL;
  84                         goto put_device;
  85                 }
  86         }
  87
  88         old_dssdev = mgr->get_device(mgr);
  89         if (old_dssdev) {
  90                 if (omapdss_device_is_enabled(old_dssdev)) {
  91                         DSSERR("old display is not disabled\n");
  92                         r = -EINVAL;
  93                         goto put_device;
  94                 }
  95
  96                 old_dssdev->driver->disconnect(old_dssdev);
  97         }
  98
  99         if (dssdev) {
 100                 r = dssdev->driver->connect(dssdev);
 101                 if (r) {
 102                         DSSERR("failed to connect new device\n");
 103                         goto put_device;
 104                 }
 105
 106                 old_dssdev = mgr->get_device(mgr);
 107                 if (old_dssdev != dssdev) {
 108                         DSSERR("failed to connect device to this manager\n");
 109                         dssdev->driver->disconnect(dssdev);
 110                         goto put_device;
 111                 }
 112
 113                 r = mgr->apply(mgr);
 114                 if (r) {
 115                         DSSERR("failed to apply dispc config\n");
 116                         goto put_device;
 117                 }
 118         }
 119
 120 put_device:
 121         if (dssdev)
 122                 omap_dss_put_device(dssdev);
 123
 124         return r ? r : size;
 125 }
 126
 127 static ssize_t manager_default_color_show(struct omap_overlay_manager *mgr,
 128                                           char *buf)
 129 {
 130         struct omap_overlay_manager_info info;
 131
 132         mgr->get_manager_info(mgr, &info);
 133
 134         return snprintf(buf, PAGE_SIZE, "%#x\n", info.default_color);
 135 }
 136
 137 static ssize_t manager_default_color_store(struct omap_overlay_manager *mgr,
 138                                            const char *buf, size_t size)
 139 {
 140         struct omap_overlay_manager_info info;
 141         u32 color;
 142         int r;
 143
 144         r = kstrtouint(buf, 0, &color);
 145         if (r)
 146                 return r;
 147
 148         mgr->get_manager_info(mgr, &info);
 149
 150         info.default_color = color;
 151
 152         r = mgr->set_manager_info(mgr, &info);
 153         if (r)
 154                 return r;
 155
 156         r = mgr->apply(mgr);
 157         if (r)
 158                 return r;
 159
 160         return size;
 161 }
 162
 163 static const char *trans_key_type_str[] = {
 164         "gfx-destination",
 165         "video-source",
 166 };
 167
 168 static ssize_t manager_trans_key_type_show(struct omap_overlay_manager *mgr,
 169                                            char *buf)
 170 {
 171         enum omap_dss_trans_key_type key_type;
 172         struct omap_overlay_manager_info info;
 173
 174         mgr->get_manager_info(mgr, &info);
 175
 176         key_type = info.trans_key_type;
 177         BUG_ON(key_type >= ARRAY_SIZE(trans_key_type_str));
 178
 179         return snprintf(buf, PAGE_SIZE, "%s\n", trans_key_type_str[key_type]);
 180 }
 181
 182 static ssize_t manager_trans_key_type_store(struct omap_overlay_manager *mgr,
 183                                             const char *buf, size_t size)
 184 {
 185         enum omap_dss_trans_key_type key_type;
 186         struct omap_overlay_manager_info info;
 187         int r;
 188
 189         for (key_type = OMAP_DSS_COLOR_KEY_GFX_DST;
 190                         key_type < ARRAY_SIZE(trans_key_type_str); key_type++) {
 191                 if (sysfs_streq(buf, trans_key_type_str[key_type]))
 192                         break;
 193         }
 194
 195         if (key_type == ARRAY_SIZE(trans_key_type_str))
 196                 return -EINVAL;
 197
 198         mgr->get_manager_info(mgr, &info);
 199
 200         info.trans_key_type = key_type;
 201
 202         r = mgr->set_manager_info(mgr, &info);
 203         if (r)
 204                 return r;
 205
 206         r = mgr->apply(mgr);
 207         if (r)
 208                 return r;
 209
 210         return size;
 211 }
 212
 213 static ssize_t manager_trans_key_value_show(struct omap_overlay_manager *mgr,
 214                                             char *buf)
 215 {
 216         struct omap_overlay_manager_info info;
 217
 218         mgr->get_manager_info(mgr, &info);
 219
 220         return snprintf(buf, PAGE_SIZE, "%#x\n", info.trans_key);
 221 }
 222
 223 static ssize_t manager_trans_key_value_store(struct omap_overlay_manager *mgr,
 224                                              const char *buf, size_t size)
 225 {
 226         struct omap_overlay_manager_info info;
 227         u32 key_value;
 228         int r;
 229
 230         r = kstrtouint(buf, 0, &key_value);
 231         if (r)
 232                 return r;
 233
 234         mgr->get_manager_info(mgr, &info);
 235
 236         info.trans_key = key_value;
 237
 238         r = mgr->set_manager_info(mgr, &info);
 239         if (r)
 240                 return r;
 241
 242         r = mgr->apply(mgr);
 243         if (r)
 244                 return r;
 245
 246         return size;
 247 }
 248
 249 static ssize_t manager_trans_key_enabled_show(struct omap_overlay_manager *mgr,
 250                                               char *buf)
 251 {
 252         struct omap_overlay_manager_info info;
 253
 254         mgr->get_manager_info(mgr, &info);
 255
 256         return snprintf(buf, PAGE_SIZE, "%d\n", info.trans_enabled);
 257 }
 258
 259 static ssize_t manager_trans_key_enabled_store(struct omap_overlay_manager *mgr,
 260                                                const char *buf, size_t size)
 261 {
 262         struct omap_overlay_manager_info info;
 263         bool enable;
 264         int r;
 265
 266         r = strtobool(buf, &enable);
 267         if (r)
 268                 return r;
 269
 270         mgr->get_manager_info(mgr, &info);
 271
 272         info.trans_enabled = enable;
 273
 274         r = mgr->set_manager_info(mgr, &info);
 275         if (r)
 276                 return r;
 277
 278         r = mgr->apply(mgr);
 279         if (r)
 280                 return r;
 281
 282         return size;
 283 }
 284
 285 static ssize_t manager_alpha_blending_enabled_show(
 286                 struct omap_overlay_manager *mgr, char *buf)
 287 {
 288         struct omap_overlay_manager_info info;
 289
 290         if(!dss_has_feature(FEAT_ALPHA_FIXED_ZORDER))
 291                 return -ENODEV;
 292
 293         mgr->get_manager_info(mgr, &info);
 294
 295         return snprintf(buf, PAGE_SIZE, "%d\n",
 296                 info.partial_alpha_enabled);
 297 }
 298
 299 static ssize_t manager_alpha_blending_enabled_store(
 300                 struct omap_overlay_manager *mgr,
 301                 const char *buf, size_t size)
 302 {
 303         struct omap_overlay_manager_info info;
 304         bool enable;
 305         int r;
 306
 307         if(!dss_has_feature(FEAT_ALPHA_FIXED_ZORDER))
 308                 return -ENODEV;
 309
 310         r = strtobool(buf, &enable);
 311         if (r)
 312                 return r;
 313
 314         mgr->get_manager_info(mgr, &info);
 315
 316         info.partial_alpha_enabled = enable;
 317
 318         r = mgr->set_manager_info(mgr, &info);
 319         if (r)
 320                 return r;
 321
 322         r = mgr->apply(mgr);
 323         if (r)
 324                 return r;
 325
 326         return size;
 327 }
 328
 329 static ssize_t manager_cpr_enable_show(struct omap_overlay_manager *mgr,
 330                 char *buf)
 331 {
 332         struct omap_overlay_manager_info info;
 333
 334         mgr->get_manager_info(mgr, &info);
 335
 336         return snprintf(buf, PAGE_SIZE, "%d\n", info.cpr_enable);
 337 }
 338
 339 static ssize_t manager_cpr_enable_store(struct omap_overlay_manager *mgr,
 340                 const char *buf, size_t size)
 341 {
 342         struct omap_overlay_manager_info info;
 343         int r;
 344         bool enable;
 345
 346         if (!dss_has_feature(FEAT_CPR))
 347                 return -ENODEV;
 348
 349         r = strtobool(buf, &enable);
 350         if (r)
 351                 return r;
 352
 353         mgr->get_manager_info(mgr, &info);
 354
 355         if (info.cpr_enable == enable)
 356                 return size;
 357
 358         info.cpr_enable = enable;
 359
 360         r = mgr->set_manager_info(mgr, &info);
 361         if (r)
 362                 return r;
 363
 364         r = mgr->apply(mgr);
 365         if (r)
 366                 return r;
 367
 368         return size;
 369 }
 370
 371 static ssize_t manager_cpr_coef_show(struct omap_overlay_manager *mgr,
 372                 char *buf)
 373 {
 374         struct omap_overlay_manager_info info;
 375
 376         mgr->get_manager_info(mgr, &info);
 377
 378         return snprintf(buf, PAGE_SIZE,
 379                         "%d %d %d %d %d %d %d %d %d\n",
 380                         info.cpr_coefs.rr,
 381                         info.cpr_coefs.rg,
 382                         info.cpr_coefs.rb,
 383                         info.cpr_coefs.gr,
 384                         info.cpr_coefs.gg,
 385                         info.cpr_coefs.gb,
 386                         info.cpr_coefs.br,
 387                         info.cpr_coefs.bg,
 388                         info.cpr_coefs.bb);
 389 }
 390
 391 static ssize_t manager_cpr_coef_store(struct omap_overlay_manager *mgr,
 392                 const char *buf, size_t size)
 393 {
 394         struct omap_overlay_manager_info info;
 395         struct omap_dss_cpr_coefs coefs;
 396         int r, i;
 397         s16 *arr;
 398
 399         if (!dss_has_feature(FEAT_CPR))
 400                 return -ENODEV;
 401
 402         if (sscanf(buf, "%hd %hd %hd %hd %hd %hd %hd %hd %hd",
 403                                 &coefs.rr, &coefs.rg, &coefs.rb,
 404                                 &coefs.gr, &coefs.gg, &coefs.gb,
 405                                 &coefs.br, &coefs.bg, &coefs.bb) != 9)
 406                 return -EINVAL;
 407
 408         arr = (s16[]){ coefs.rr, coefs.rg, coefs.rb,
 409                 coefs.gr, coefs.gg, coefs.gb,
 410                 coefs.br, coefs.bg, coefs.bb };
 411
 412         for (i = 0; i < 9; ++i) {
 413                 if (arr[i] < -512 || arr[i] > 511)
 414                         return -EINVAL;
 415         }
 416
 417         mgr->get_manager_info(mgr, &info);
 418
 419         info.cpr_coefs = coefs;
 420
 421         r = mgr->set_manager_info(mgr, &info);
 422         if (r)
 423                 return r;
 424
 425         r = mgr->apply(mgr);
 426         if (r)
 427                 return r;
 428
 429         return size;
 430 }
 431
 432 struct manager_attribute {
 433         struct attribute attr;
 434         ssize_t (*show)(struct omap_overlay_manager *, char *);
 435         ssize_t (*store)(struct omap_overlay_manager *, const char *, size_t);
 436 };
 437
 438 #define MANAGER_ATTR(_name, _mode, _show, _store) \
 439         struct manager_attribute manager_attr_##_name = \
 440         __ATTR(_name, _mode, _show, _store)
 441
 442 static MANAGER_ATTR(name, S_IRUGO, manager_name_show, NULL);
 443 static MANAGER_ATTR(display, S_IRUGO|S_IWUSR,
 444                 manager_display_show, manager_display_store);
 445 static MANAGER_ATTR(default_color, S_IRUGO|S_IWUSR,
 446                 manager_default_color_show, manager_default_color_store);
 447 static MANAGER_ATTR(trans_key_type, S_IRUGO|S_IWUSR,
 448                 manager_trans_key_type_show, manager_trans_key_type_store);
 449 static MANAGER_ATTR(trans_key_value, S_IRUGO|S_IWUSR,
 450                 manager_trans_key_value_show, manager_trans_key_value_store);
 451 static MANAGER_ATTR(trans_key_enabled, S_IRUGO|S_IWUSR,
 452                 manager_trans_key_enabled_show,
 453                 manager_trans_key_enabled_store);
 454 static MANAGER_ATTR(alpha_blending_enabled, S_IRUGO|S_IWUSR,
 455                 manager_alpha_blending_enabled_show,
 456                 manager_alpha_blending_enabled_store);
 457 static MANAGER_ATTR(cpr_enable, S_IRUGO|S_IWUSR,
 458                 manager_cpr_enable_show,
 459                 manager_cpr_enable_store);
 460 static MANAGER_ATTR(cpr_coef, S_IRUGO|S_IWUSR,
 461                 manager_cpr_coef_show,
 462                 manager_cpr_coef_store);
 463
 464
 465 static struct attribute *manager_sysfs_attrs[] = {
 466         &manager_attr_name.attr,
 467         &manager_attr_display.attr,
 468         &manager_attr_default_color.attr,
 469         &manager_attr_trans_key_type.attr,
 470         &manager_attr_trans_key_value.attr,
 471         &manager_attr_trans_key_enabled.attr,
 472         &manager_attr_alpha_blending_enabled.attr,
 473         &manager_attr_cpr_enable.attr,
 474         &manager_attr_cpr_coef.attr,
 475         NULL
 476 };
 477
 478 static ssize_t manager_attr_show(struct kobject *kobj, struct attribute *attr,
 479                 char *buf)
 480 {
 481         struct omap_overlay_manager *manager;
 482         struct manager_attribute *manager_attr;
 483
 484         manager = container_of(kobj, struct omap_overlay_manager, kobj);
 485         manager_attr = container_of(attr, struct manager_attribute, attr);
 486
 487         if (!manager_attr->show)
 488                 return -ENOENT;
 489
 490         return manager_attr->show(manager, buf);
 491 }
 492
 493 static ssize_t manager_attr_store(struct kobject *kobj, struct attribute *attr,
 494                 const char *buf, size_t size)
 495 {
 496         struct omap_overlay_manager *manager;
 497         struct manager_attribute *manager_attr;
 498
 499         manager = container_of(kobj, struct omap_overlay_manager, kobj);
 500         manager_attr = container_of(attr, struct manager_attribute, attr);
 501
 502         if (!manager_attr->store)
 503                 return -ENOENT;
 504
 505         return manager_attr->store(manager, buf, size);
 506 }
 507
 508 static const struct sysfs_ops manager_sysfs_ops = {
 509         .show = manager_attr_show,
 510         .store = manager_attr_store,
 511 };
 512
 513 static struct kobj_type manager_ktype = {
 514         .sysfs_ops = &manager_sysfs_ops,
 515         .default_attrs = manager_sysfs_attrs,
 516 };
 517
 518 int dss_manager_kobj_init(struct omap_overlay_manager *mgr,
 519                 struct platform_device *pdev)
 520 {
 521         return kobject_init_and_add(&mgr->kobj, &manager_ktype,
 522                         &pdev->dev.kobj, "manager%d", mgr->id);
 523 }
 524
 525 void dss_manager_kobj_uninit(struct omap_overlay_manager *mgr)
 526 {
 527         kobject_del(&mgr->kobj);
 528         kobject_put(&mgr->kobj);
 529
 530         memset(&mgr->kobj, 0, sizeof(mgr->kobj));
 531 }