drivers/gpu/drm/exynos/exynos_drm_hdmi.c

   1 /*
   2  * Copyright (C) 2011 Samsung Electronics Co.Ltd
   3  * Authors:
   4  *      Inki Dae <inki.dae@samsung.com>
   5  *      Seung-Woo Kim <sw0312.kim@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
  14 #include "drmP.h"
  15
  16 #include <linux/kernel.h>
  17 #include <linux/wait.h>
  18 #include <linux/module.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/pm_runtime.h>
  21
  22 #include <drm/exynos_drm.h>
  23
  24 #include "exynos_drm_drv.h"
  25 #include "exynos_drm_hdmi.h"
  26
  27 #define to_context(dev)         platform_get_drvdata(to_platform_device(dev))
  28 #define to_subdrv(dev)          to_context(dev)
  29 #define get_ctx_from_subdrv(subdrv)     container_of(subdrv,\
  30                                         struct drm_hdmi_context, subdrv);
  31
  32 /* these callback points shoud be set by specific drivers. */
  33 static struct exynos_hdmi_display_ops *hdmi_display_ops;
  34 static struct exynos_hdmi_manager_ops *hdmi_manager_ops;
  35 static struct exynos_hdmi_overlay_ops *hdmi_overlay_ops;
  36
  37 struct drm_hdmi_context {
  38         struct exynos_drm_subdrv        subdrv;
  39         struct exynos_drm_hdmi_context  *hdmi_ctx;
  40         struct exynos_drm_hdmi_context  *mixer_ctx;
  41         struct work_struct              work;
  42 };
  43
  44 void exynos_drm_display_ops_register(struct exynos_hdmi_display_ops
  45                                         *display_ops)
  46 {
  47         DRM_DEBUG_KMS("%s\n", __FILE__);
  48
  49         if (display_ops)
  50                 hdmi_display_ops = display_ops;
  51 }
  52 EXPORT_SYMBOL(exynos_drm_display_ops_register);
  53
  54 void exynos_drm_manager_ops_register(struct exynos_hdmi_manager_ops
  55                                         *manager_ops)
  56 {
  57         DRM_DEBUG_KMS("%s\n", __FILE__);
  58
  59         if (manager_ops)
  60                 hdmi_manager_ops = manager_ops;
  61 }
  62 EXPORT_SYMBOL(exynos_drm_manager_ops_register);
  63
  64 void exynos_drm_overlay_ops_register(struct exynos_hdmi_overlay_ops
  65                                         *overlay_ops)
  66 {
  67         DRM_DEBUG_KMS("%s\n", __FILE__);
  68
  69         if (overlay_ops)
  70                 hdmi_overlay_ops = overlay_ops;
  71 }
  72 EXPORT_SYMBOL(exynos_drm_overlay_ops_register);
  73
  74 static bool drm_hdmi_is_connected(struct device *dev)
  75 {
  76         struct drm_hdmi_context *ctx = to_context(dev);
  77
  78         DRM_DEBUG_KMS("%s\n", __FILE__);
  79
  80         if (hdmi_display_ops && hdmi_display_ops->is_connected)
  81                 return hdmi_display_ops->is_connected(ctx->hdmi_ctx->ctx);
  82
  83         return false;
  84 }
  85
  86 static int drm_hdmi_get_edid(struct device *dev,
  87                 struct drm_connector *connector, u8 *edid, int len)
  88 {
  89         struct drm_hdmi_context *ctx = to_context(dev);
  90
  91         DRM_DEBUG_KMS("%s\n", __FILE__);
  92
  93         if (hdmi_display_ops && hdmi_display_ops->get_edid)
  94                 return hdmi_display_ops->get_edid(ctx->hdmi_ctx->ctx,
  95                                 connector, edid, len);
  96
  97         return 0;
  98 }
  99
 100 static int drm_hdmi_check_timing(struct device *dev, void *timing)
 101 {
 102         struct drm_hdmi_context *ctx = to_context(dev);
 103
 104         DRM_DEBUG_KMS("%s\n", __FILE__);
 105
 106         if (hdmi_display_ops && hdmi_display_ops->check_timing)
 107                 return hdmi_display_ops->check_timing(ctx->hdmi_ctx->ctx,
 108                                 timing);
 109
 110         return 0;
 111 }
 112
 113 static int drm_hdmi_power_on(struct device *dev, int mode)
 114 {
 115         struct drm_hdmi_context *ctx = to_context(dev);
 116
 117         DRM_DEBUG_KMS("%s\n", __FILE__);
 118
 119         if (hdmi_display_ops && hdmi_display_ops->power_on)
 120                 return hdmi_display_ops->power_on(ctx->hdmi_ctx->ctx, mode);
 121
 122         return 0;
 123 }
 124
 125 static struct exynos_drm_display_ops drm_hdmi_display_ops = {
 126         .type = EXYNOS_DISPLAY_TYPE_HDMI,
 127         .is_connected = drm_hdmi_is_connected,
 128         .get_edid = drm_hdmi_get_edid,
 129         .check_timing = drm_hdmi_check_timing,
 130         .power_on = drm_hdmi_power_on,
 131 };
 132
 133 static int drm_hdmi_enable_vblank(struct device *subdrv_dev)
 134 {
 135         struct drm_hdmi_context *ctx = to_context(subdrv_dev);
 136         struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
 137         struct exynos_drm_manager *manager = &subdrv->manager;
 138
 139         DRM_DEBUG_KMS("%s\n", __FILE__);
 140
 141         if (hdmi_overlay_ops && hdmi_overlay_ops->enable_vblank)
 142                 return hdmi_overlay_ops->enable_vblank(ctx->mixer_ctx->ctx,
 143                                                         manager->pipe);
 144
 145         return 0;
 146 }
 147
 148 static void drm_hdmi_disable_vblank(struct device *subdrv_dev)
 149 {
 150         struct drm_hdmi_context *ctx = to_context(subdrv_dev);
 151
 152         DRM_DEBUG_KMS("%s\n", __FILE__);
 153
 154         if (hdmi_overlay_ops && hdmi_overlay_ops->disable_vblank)
 155                 return hdmi_overlay_ops->disable_vblank(ctx->mixer_ctx->ctx);
 156 }
 157
 158 static void drm_hdmi_mode_set(struct device *subdrv_dev, void *mode)
 159 {
 160         struct drm_hdmi_context *ctx = to_context(subdrv_dev);
 161
 162         DRM_DEBUG_KMS("%s\n", __FILE__);
 163
 164         if (hdmi_manager_ops && hdmi_manager_ops->mode_set)
 165                 hdmi_manager_ops->mode_set(ctx->hdmi_ctx->ctx, mode);
 166 }
 167
 168 static void drm_hdmi_commit(struct device *subdrv_dev)
 169 {
 170         struct drm_hdmi_context *ctx = to_context(subdrv_dev);
 171
 172         DRM_DEBUG_KMS("%s\n", __FILE__);
 173
 174         if (hdmi_manager_ops && hdmi_manager_ops->commit)
 175                 hdmi_manager_ops->commit(ctx->hdmi_ctx->ctx);
 176 }
 177
 178 static void drm_hdmi_dpms(struct device *subdrv_dev, int mode)
 179 {
 180         struct drm_hdmi_context *ctx = to_context(subdrv_dev);
 181
 182         DRM_DEBUG_KMS("%s\n", __FILE__);
 183
 184         switch (mode) {
 185         case DRM_MODE_DPMS_ON:
 186                 break;
 187         case DRM_MODE_DPMS_STANDBY:
 188         case DRM_MODE_DPMS_SUSPEND:
 189         case DRM_MODE_DPMS_OFF:
 190                 if (hdmi_manager_ops && hdmi_manager_ops->disable)
 191                         hdmi_manager_ops->disable(ctx->hdmi_ctx->ctx);
 192                 break;
 193         default:
 194                 DRM_DEBUG_KMS("unkown dps mode: %d\n", mode);
 195                 break;
 196         }
 197 }
 198
 199 static struct exynos_drm_manager_ops drm_hdmi_manager_ops = {
 200         .dpms = drm_hdmi_dpms,
 201         .enable_vblank = drm_hdmi_enable_vblank,
 202         .disable_vblank = drm_hdmi_disable_vblank,
 203         .mode_set = drm_hdmi_mode_set,
 204         .commit = drm_hdmi_commit,
 205 };
 206
 207 static void drm_mixer_mode_set(struct device *subdrv_dev,
 208                 struct exynos_drm_overlay *overlay)
 209 {
 210         struct drm_hdmi_context *ctx = to_context(subdrv_dev);
 211
 212         DRM_DEBUG_KMS("%s\n", __FILE__);
 213
 214         if (hdmi_overlay_ops && hdmi_overlay_ops->win_mode_set)
 215                 hdmi_overlay_ops->win_mode_set(ctx->mixer_ctx->ctx, overlay);
 216 }
 217
 218 static void drm_mixer_commit(struct device *subdrv_dev, int zpos)
 219 {
 220         struct drm_hdmi_context *ctx = to_context(subdrv_dev);
 221
 222         DRM_DEBUG_KMS("%s\n", __FILE__);
 223
 224         if (hdmi_overlay_ops && hdmi_overlay_ops->win_commit)
 225                 hdmi_overlay_ops->win_commit(ctx->mixer_ctx->ctx, zpos);
 226 }
 227
 228 static void drm_mixer_disable(struct device *subdrv_dev, int zpos)
 229 {
 230         struct drm_hdmi_context *ctx = to_context(subdrv_dev);
 231
 232         DRM_DEBUG_KMS("%s\n", __FILE__);
 233
 234         if (hdmi_overlay_ops && hdmi_overlay_ops->win_disable)
 235                 hdmi_overlay_ops->win_disable(ctx->mixer_ctx->ctx, zpos);
 236 }
 237
 238 static struct exynos_drm_overlay_ops drm_hdmi_overlay_ops = {
 239         .mode_set = drm_mixer_mode_set,
 240         .commit = drm_mixer_commit,
 241         .disable = drm_mixer_disable,
 242 };
 243
 244
 245 static int hdmi_subdrv_probe(struct drm_device *drm_dev,
 246                 struct device *dev)
 247 {
 248         struct exynos_drm_subdrv *subdrv = to_subdrv(dev);
 249         struct drm_hdmi_context *ctx;
 250         struct platform_device *pdev = to_platform_device(dev);
 251         struct exynos_drm_common_hdmi_pd *pd;
 252         int ret;
 253
 254         DRM_DEBUG_KMS("%s\n", __FILE__);
 255
 256         pd = pdev->dev.platform_data;
 257
 258         if (!pd) {
 259                 DRM_DEBUG_KMS("platform data is null.\n");
 260                 return -EFAULT;
 261         }
 262
 263         if (!pd->hdmi_dev) {
 264                 DRM_DEBUG_KMS("hdmi device is null.\n");
 265                 return -EFAULT;
 266         }
 267
 268         if (!pd->mixer_dev) {
 269                 DRM_DEBUG_KMS("mixer device is null.\n");
 270                 return -EFAULT;
 271         }
 272
 273         ret = platform_driver_register(&hdmi_driver);
 274         if (ret) {
 275                 DRM_DEBUG_KMS("failed to register hdmi driver.\n");
 276                 return ret;
 277         }
 278
 279         ret = platform_driver_register(&mixer_driver);
 280         if (ret) {
 281                 DRM_DEBUG_KMS("failed to register mixer driver.\n");
 282                 goto err_hdmidrv;
 283         }
 284
 285         ctx = get_ctx_from_subdrv(subdrv);
 286
 287         ctx->hdmi_ctx = (struct exynos_drm_hdmi_context *)
 288                                 to_context(pd->hdmi_dev);
 289         if (!ctx->hdmi_ctx) {
 290                 DRM_DEBUG_KMS("hdmi context is null.\n");
 291                 ret = -EFAULT;
 292                 goto err_mixerdrv;
 293         }
 294
 295         ctx->hdmi_ctx->drm_dev = drm_dev;
 296
 297         ctx->mixer_ctx = (struct exynos_drm_hdmi_context *)
 298                                 to_context(pd->mixer_dev);
 299         if (!ctx->mixer_ctx) {
 300                 DRM_DEBUG_KMS("mixer context is null.\n");
 301                 ret = -EFAULT;
 302                 goto err_mixerdrv;
 303         }
 304
 305         ctx->mixer_ctx->drm_dev = drm_dev;
 306
 307         return 0;
 308
 309 err_mixerdrv:
 310         platform_driver_unregister(&mixer_driver);
 311 err_hdmidrv:
 312         platform_driver_unregister(&hdmi_driver);
 313         return ret;
 314 }
 315
 316 static void hdmi_subdrv_remove(struct drm_device *drm_dev)
 317 {
 318         DRM_DEBUG_KMS("%s\n", __FILE__);
 319
 320         platform_driver_unregister(&hdmi_driver);
 321         platform_driver_unregister(&mixer_driver);
 322 }
 323
 324 static void exynos_drm_hdmi_late_probe(struct work_struct *work)
 325 {
 326         struct drm_hdmi_context *ctx = container_of(work,
 327                                 struct drm_hdmi_context, work);
 328
 329         /*
 330          * this function calls subdrv->probe() so this must be called
 331          * after probe context.
 332          *
 333          * PS. subdrv->probe() will call platform_driver_register() to probe
 334          * hdmi and mixer driver.
 335          */
 336         exynos_drm_subdrv_register(&ctx->subdrv);
 337 }
 338
 339 static int __devinit exynos_drm_hdmi_probe(struct platform_device *pdev)
 340 {
 341         struct device *dev = &pdev->dev;
 342         struct exynos_drm_subdrv *subdrv;
 343         struct drm_hdmi_context *ctx;
 344
 345         DRM_DEBUG_KMS("%s\n", __FILE__);
 346
 347         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 348         if (!ctx) {
 349                 DRM_LOG_KMS("failed to alloc common hdmi context.\n");
 350                 return -ENOMEM;
 351         }
 352
 353         subdrv = &ctx->subdrv;
 354
 355         subdrv->probe = hdmi_subdrv_probe;
 356         subdrv->remove = hdmi_subdrv_remove;
 357         subdrv->manager.pipe = -1;
 358         subdrv->manager.ops = &drm_hdmi_manager_ops;
 359         subdrv->manager.overlay_ops = &drm_hdmi_overlay_ops;
 360         subdrv->manager.display_ops = &drm_hdmi_display_ops;
 361         subdrv->manager.dev = dev;
 362
 363         platform_set_drvdata(pdev, subdrv);
 364
 365         INIT_WORK(&ctx->work, exynos_drm_hdmi_late_probe);
 366
 367         schedule_work(&ctx->work);
 368
 369         return 0;
 370 }
 371
 372 static int hdmi_runtime_suspend(struct device *dev)
 373 {
 374         DRM_DEBUG_KMS("%s\n", __FILE__);
 375
 376         return 0;
 377 }
 378
 379 static int hdmi_runtime_resume(struct device *dev)
 380 {
 381         DRM_DEBUG_KMS("%s\n", __FILE__);
 382
 383         return 0;
 384 }
 385
 386 static const struct dev_pm_ops hdmi_pm_ops = {
 387         .runtime_suspend = hdmi_runtime_suspend,
 388         .runtime_resume  = hdmi_runtime_resume,
 389 };
 390
 391 static int __devexit exynos_drm_hdmi_remove(struct platform_device *pdev)
 392 {
 393         struct drm_hdmi_context *ctx = platform_get_drvdata(pdev);
 394
 395         DRM_DEBUG_KMS("%s\n", __FILE__);
 396
 397         exynos_drm_subdrv_unregister(&ctx->subdrv);
 398         kfree(ctx);
 399
 400         return 0;
 401 }
 402
 403 static struct platform_driver exynos_drm_common_hdmi_driver = {
 404         .probe          = exynos_drm_hdmi_probe,
 405         .remove         = __devexit_p(exynos_drm_hdmi_remove),
 406         .driver         = {
 407                 .name   = "exynos-drm-hdmi",
 408                 .owner  = THIS_MODULE,
 409                 .pm = &hdmi_pm_ops,
 410         },
 411 };
 412
 413 static int __init exynos_drm_hdmi_init(void)
 414 {
 415         int ret;
 416
 417         DRM_DEBUG_KMS("%s\n", __FILE__);
 418
 419         ret = platform_driver_register(&exynos_drm_common_hdmi_driver);
 420         if (ret) {
 421                 DRM_DEBUG_KMS("failed to register hdmi common driver.\n");
 422                 return ret;
 423         }
 424
 425         return ret;
 426 }
 427
 428 static void __exit exynos_drm_hdmi_exit(void)
 429 {
 430         platform_driver_unregister(&exynos_drm_common_hdmi_driver);
 431 }
 432
 433 module_init(exynos_drm_hdmi_init);
 434 module_exit(exynos_drm_hdmi_exit);
 435
 436 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 437 MODULE_AUTHOR("Seung-Woo Kim, <sw0312.kim@samsung.com>");
 438 MODULE_DESCRIPTION("Samsung SoC DRM HDMI Driver");
 439 MODULE_LICENSE("GPL");