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 #include <linux/timer.h> 19 20 #include <drm/exynos_drm.h> 21 22 #include <drm/drm_edid.h> 23 #include <drm/drm_crtc_helper.h> 24 #include <drm/drm_atomic_helper.h> 25 26 #include "exynos_drm_drv.h" 27 #include "exynos_drm_crtc.h" 28 #include "exynos_drm_fb.h" 29 #include "exynos_drm_plane.h" 30 #include "exynos_drm_vidi.h" 31 32 /* VIDI uses fixed refresh rate of 50Hz */ 33 #define VIDI_REFRESH_TIME (1000 / 50) 34 35 /* vidi has totally three virtual windows. */ 36 #define WINDOWS_NR 3 37 38 #define ctx_from_connector(c) container_of(c, struct vidi_context, \ 39 connector) 40 41 struct vidi_context { 42 struct drm_encoder encoder; 43 struct platform_device *pdev; 44 struct drm_device *drm_dev; 45 struct exynos_drm_crtc *crtc; 46 struct drm_connector connector; 47 struct exynos_drm_plane planes[WINDOWS_NR]; 48 struct edid *raw_edid; 49 unsigned int clkdiv; 50 unsigned int connected; 51 bool suspended; 52 struct timer_list timer; 53 struct mutex lock; 54 int pipe; 55 }; 56 57 static inline struct vidi_context *encoder_to_vidi(struct drm_encoder *e) 58 { 59 return container_of(e, struct vidi_context, encoder); 60 } 61 62 static const char fake_edid_info[] = { 63 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0x2d, 0x05, 0x05, 64 0x00, 0x00, 0x00, 0x00, 0x30, 0x12, 0x01, 0x03, 0x80, 0x10, 0x09, 0x78, 65 0x0a, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xbd, 66 0xee, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 67 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x66, 0x21, 0x50, 0xb0, 0x51, 0x00, 68 0x1b, 0x30, 0x40, 0x70, 0x36, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 69 0x01, 0x1d, 0x00, 0x72, 0x51, 0xd0, 0x1e, 0x20, 0x6e, 0x28, 0x55, 0x00, 70 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18, 71 0x4b, 0x1a, 0x44, 0x17, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 72 0x00, 0x00, 0x00, 0xfc, 0x00, 0x53, 0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47, 73 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x01, 0xbc, 0x02, 0x03, 0x1e, 0xf1, 74 0x46, 0x84, 0x05, 0x03, 0x10, 0x20, 0x22, 0x23, 0x09, 0x07, 0x07, 0x83, 75 0x01, 0x00, 0x00, 0xe2, 0x00, 0x0f, 0x67, 0x03, 0x0c, 0x00, 0x10, 0x00, 76 0xb8, 0x2d, 0x01, 0x1d, 0x80, 0x18, 0x71, 0x1c, 0x16, 0x20, 0x58, 0x2c, 77 0x25, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x9e, 0x8c, 0x0a, 0xd0, 0x8a, 78 0x20, 0xe0, 0x2d, 0x10, 0x10, 0x3e, 0x96, 0x00, 0xa0, 0x5a, 0x00, 0x00, 79 0x00, 0x18, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c, 80 0x45, 0x00, 0xa0, 0x5a, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x00, 81 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 82 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 83 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 84 0x00, 0x00, 0x00, 0x06 85 }; 86 87 static const uint32_t formats[] = { 88 DRM_FORMAT_XRGB8888, 89 DRM_FORMAT_ARGB8888, 90 DRM_FORMAT_NV12, 91 }; 92 93 static const enum drm_plane_type vidi_win_types[WINDOWS_NR] = { 94 DRM_PLANE_TYPE_PRIMARY, 95 DRM_PLANE_TYPE_OVERLAY, 96 DRM_PLANE_TYPE_CURSOR, 97 }; 98 99 static int vidi_enable_vblank(struct exynos_drm_crtc *crtc) 100 { 101 struct vidi_context *ctx = crtc->ctx; 102 103 if (ctx->suspended) 104 return -EPERM; 105 106 mod_timer(&ctx->timer, 107 jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1); 108 109 return 0; 110 } 111 112 static void vidi_disable_vblank(struct exynos_drm_crtc *crtc) 113 { 114 } 115 116 static void vidi_update_plane(struct exynos_drm_crtc *crtc, 117 struct exynos_drm_plane *plane) 118 { 119 struct drm_plane_state *state = plane->base.state; 120 struct vidi_context *ctx = crtc->ctx; 121 dma_addr_t addr; 122 123 if (ctx->suspended) 124 return; 125 126 addr = exynos_drm_fb_dma_addr(state->fb, 0); 127 DRM_DEBUG_KMS("dma_addr = %pad\n", &addr); 128 } 129 130 static void vidi_enable(struct exynos_drm_crtc *crtc) 131 { 132 struct vidi_context *ctx = crtc->ctx; 133 134 mutex_lock(&ctx->lock); 135 136 ctx->suspended = false; 137 138 mutex_unlock(&ctx->lock); 139 140 drm_crtc_vblank_on(&crtc->base); 141 } 142 143 static void vidi_disable(struct exynos_drm_crtc *crtc) 144 { 145 struct vidi_context *ctx = crtc->ctx; 146 147 drm_crtc_vblank_off(&crtc->base); 148 149 mutex_lock(&ctx->lock); 150 151 ctx->suspended = true; 152 153 mutex_unlock(&ctx->lock); 154 } 155 156 static int vidi_ctx_initialize(struct vidi_context *ctx, 157 struct drm_device *drm_dev) 158 { 159 struct exynos_drm_private *priv = drm_dev->dev_private; 160 161 ctx->drm_dev = drm_dev; 162 ctx->pipe = priv->pipe++; 163 164 return 0; 165 } 166 167 static const struct exynos_drm_crtc_ops vidi_crtc_ops = { 168 .enable = vidi_enable, 169 .disable = vidi_disable, 170 .enable_vblank = vidi_enable_vblank, 171 .disable_vblank = vidi_disable_vblank, 172 .update_plane = vidi_update_plane, 173 }; 174 175 static void vidi_fake_vblank_timer(unsigned long arg) 176 { 177 struct vidi_context *ctx = (void *)arg; 178 179 if (ctx->pipe < 0) 180 return; 181 182 if (drm_crtc_handle_vblank(&ctx->crtc->base)) 183 mod_timer(&ctx->timer, 184 jiffies + msecs_to_jiffies(VIDI_REFRESH_TIME) - 1); 185 } 186 187 static ssize_t vidi_show_connection(struct device *dev, 188 struct device_attribute *attr, char *buf) 189 { 190 struct vidi_context *ctx = dev_get_drvdata(dev); 191 int rc; 192 193 mutex_lock(&ctx->lock); 194 195 rc = sprintf(buf, "%d\n", ctx->connected); 196 197 mutex_unlock(&ctx->lock); 198 199 return rc; 200 } 201 202 static ssize_t vidi_store_connection(struct device *dev, 203 struct device_attribute *attr, 204 const char *buf, size_t len) 205 { 206 struct vidi_context *ctx = dev_get_drvdata(dev); 207 int ret; 208 209 ret = kstrtoint(buf, 0, &ctx->connected); 210 if (ret) 211 return ret; 212 213 if (ctx->connected > 1) 214 return -EINVAL; 215 216 /* use fake edid data for test. */ 217 if (!ctx->raw_edid) 218 ctx->raw_edid = (struct edid *)fake_edid_info; 219 220 /* if raw_edid isn't same as fake data then it can't be tested. */ 221 if (ctx->raw_edid != (struct edid *)fake_edid_info) { 222 DRM_DEBUG_KMS("edid data is not fake data.\n"); 223 return -EINVAL; 224 } 225 226 DRM_DEBUG_KMS("requested connection.\n"); 227 228 drm_helper_hpd_irq_event(ctx->drm_dev); 229 230 return len; 231 } 232 233 static DEVICE_ATTR(connection, 0644, vidi_show_connection, 234 vidi_store_connection); 235 236 int vidi_connection_ioctl(struct drm_device *drm_dev, void *data, 237 struct drm_file *file_priv) 238 { 239 struct vidi_context *ctx = dev_get_drvdata(drm_dev->dev); 240 struct drm_exynos_vidi_connection *vidi = data; 241 242 if (!vidi) { 243 DRM_DEBUG_KMS("user data for vidi is null.\n"); 244 return -EINVAL; 245 } 246 247 if (vidi->connection > 1) { 248 DRM_DEBUG_KMS("connection should be 0 or 1.\n"); 249 return -EINVAL; 250 } 251 252 if (ctx->connected == vidi->connection) { 253 DRM_DEBUG_KMS("same connection request.\n"); 254 return -EINVAL; 255 } 256 257 if (vidi->connection) { 258 struct edid *raw_edid; 259 260 raw_edid = (struct edid *)(unsigned long)vidi->edid; 261 if (!drm_edid_is_valid(raw_edid)) { 262 DRM_DEBUG_KMS("edid data is invalid.\n"); 263 return -EINVAL; 264 } 265 ctx->raw_edid = drm_edid_duplicate(raw_edid); 266 if (!ctx->raw_edid) { 267 DRM_DEBUG_KMS("failed to allocate raw_edid.\n"); 268 return -ENOMEM; 269 } 270 } else { 271 /* 272 * with connection = 0, free raw_edid 273 * only if raw edid data isn't same as fake data. 274 */ 275 if (ctx->raw_edid && ctx->raw_edid != 276 (struct edid *)fake_edid_info) { 277 kfree(ctx->raw_edid); 278 ctx->raw_edid = NULL; 279 } 280 } 281 282 ctx->connected = vidi->connection; 283 drm_helper_hpd_irq_event(ctx->drm_dev); 284 285 return 0; 286 } 287 288 static enum drm_connector_status vidi_detect(struct drm_connector *connector, 289 bool force) 290 { 291 struct vidi_context *ctx = ctx_from_connector(connector); 292 293 /* 294 * connection request would come from user side 295 * to do hotplug through specific ioctl. 296 */ 297 return ctx->connected ? connector_status_connected : 298 connector_status_disconnected; 299 } 300 301 static void vidi_connector_destroy(struct drm_connector *connector) 302 { 303 } 304 305 static const struct drm_connector_funcs vidi_connector_funcs = { 306 .dpms = drm_atomic_helper_connector_dpms, 307 .fill_modes = drm_helper_probe_single_connector_modes, 308 .detect = vidi_detect, 309 .destroy = vidi_connector_destroy, 310 .reset = drm_atomic_helper_connector_reset, 311 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 312 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 313 }; 314 315 static int vidi_get_modes(struct drm_connector *connector) 316 { 317 struct vidi_context *ctx = ctx_from_connector(connector); 318 struct edid *edid; 319 int edid_len; 320 321 /* 322 * the edid data comes from user side and it would be set 323 * to ctx->raw_edid through specific ioctl. 324 */ 325 if (!ctx->raw_edid) { 326 DRM_DEBUG_KMS("raw_edid is null.\n"); 327 return -EFAULT; 328 } 329 330 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH; 331 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL); 332 if (!edid) { 333 DRM_DEBUG_KMS("failed to allocate edid\n"); 334 return -ENOMEM; 335 } 336 337 drm_mode_connector_update_edid_property(connector, edid); 338 339 return drm_add_edid_modes(connector, edid); 340 } 341 342 static const struct drm_connector_helper_funcs vidi_connector_helper_funcs = { 343 .get_modes = vidi_get_modes, 344 }; 345 346 static int vidi_create_connector(struct drm_encoder *encoder) 347 { 348 struct vidi_context *ctx = encoder_to_vidi(encoder); 349 struct drm_connector *connector = &ctx->connector; 350 int ret; 351 352 connector->polled = DRM_CONNECTOR_POLL_HPD; 353 354 ret = drm_connector_init(ctx->drm_dev, connector, 355 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL); 356 if (ret) { 357 DRM_ERROR("Failed to initialize connector with drm\n"); 358 return ret; 359 } 360 361 drm_connector_helper_add(connector, &vidi_connector_helper_funcs); 362 drm_connector_register(connector); 363 drm_mode_connector_attach_encoder(connector, encoder); 364 365 return 0; 366 } 367 368 static void exynos_vidi_mode_set(struct drm_encoder *encoder, 369 struct drm_display_mode *mode, 370 struct drm_display_mode *adjusted_mode) 371 { 372 } 373 374 static void exynos_vidi_enable(struct drm_encoder *encoder) 375 { 376 } 377 378 static void exynos_vidi_disable(struct drm_encoder *encoder) 379 { 380 } 381 382 static const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = { 383 .mode_set = exynos_vidi_mode_set, 384 .enable = exynos_vidi_enable, 385 .disable = exynos_vidi_disable, 386 }; 387 388 static const struct drm_encoder_funcs exynos_vidi_encoder_funcs = { 389 .destroy = drm_encoder_cleanup, 390 }; 391 392 static int vidi_bind(struct device *dev, struct device *master, void *data) 393 { 394 struct vidi_context *ctx = dev_get_drvdata(dev); 395 struct drm_device *drm_dev = data; 396 struct drm_encoder *encoder = &ctx->encoder; 397 struct exynos_drm_plane *exynos_plane; 398 struct exynos_drm_plane_config plane_config = { 0 }; 399 unsigned int i; 400 int pipe, ret; 401 402 vidi_ctx_initialize(ctx, drm_dev); 403 404 plane_config.pixel_formats = formats; 405 plane_config.num_pixel_formats = ARRAY_SIZE(formats); 406 407 for (i = 0; i < WINDOWS_NR; i++) { 408 plane_config.zpos = i; 409 plane_config.type = vidi_win_types[i]; 410 411 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i, 412 1 << ctx->pipe, &plane_config); 413 if (ret) 414 return ret; 415 } 416 417 exynos_plane = &ctx->planes[DEFAULT_WIN]; 418 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base, 419 ctx->pipe, EXYNOS_DISPLAY_TYPE_VIDI, 420 &vidi_crtc_ops, ctx); 421 if (IS_ERR(ctx->crtc)) { 422 DRM_ERROR("failed to create crtc.\n"); 423 return PTR_ERR(ctx->crtc); 424 } 425 426 pipe = exynos_drm_crtc_get_pipe_from_type(drm_dev, 427 EXYNOS_DISPLAY_TYPE_VIDI); 428 if (pipe < 0) 429 return pipe; 430 431 encoder->possible_crtcs = 1 << pipe; 432 433 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs); 434 435 drm_encoder_init(drm_dev, encoder, &exynos_vidi_encoder_funcs, 436 DRM_MODE_ENCODER_TMDS, NULL); 437 438 drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs); 439 440 ret = vidi_create_connector(encoder); 441 if (ret) { 442 DRM_ERROR("failed to create connector ret = %d\n", ret); 443 drm_encoder_cleanup(encoder); 444 return ret; 445 } 446 447 return 0; 448 } 449 450 451 static void vidi_unbind(struct device *dev, struct device *master, void *data) 452 { 453 struct vidi_context *ctx = dev_get_drvdata(dev); 454 455 del_timer_sync(&ctx->timer); 456 } 457 458 static const struct component_ops vidi_component_ops = { 459 .bind = vidi_bind, 460 .unbind = vidi_unbind, 461 }; 462 463 static int vidi_probe(struct platform_device *pdev) 464 { 465 struct vidi_context *ctx; 466 int ret; 467 468 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); 469 if (!ctx) 470 return -ENOMEM; 471 472 ctx->pdev = pdev; 473 474 setup_timer(&ctx->timer, vidi_fake_vblank_timer, (unsigned long)ctx); 475 476 mutex_init(&ctx->lock); 477 478 platform_set_drvdata(pdev, ctx); 479 480 ret = device_create_file(&pdev->dev, &dev_attr_connection); 481 if (ret < 0) { 482 DRM_ERROR("failed to create connection sysfs.\n"); 483 return ret; 484 } 485 486 ret = component_add(&pdev->dev, &vidi_component_ops); 487 if (ret) 488 goto err_remove_file; 489 490 return ret; 491 492 err_remove_file: 493 device_remove_file(&pdev->dev, &dev_attr_connection); 494 495 return ret; 496 } 497 498 static int vidi_remove(struct platform_device *pdev) 499 { 500 struct vidi_context *ctx = platform_get_drvdata(pdev); 501 502 if (ctx->raw_edid != (struct edid *)fake_edid_info) { 503 kfree(ctx->raw_edid); 504 ctx->raw_edid = NULL; 505 506 return -EINVAL; 507 } 508 509 component_del(&pdev->dev, &vidi_component_ops); 510 511 return 0; 512 } 513 514 struct platform_driver vidi_driver = { 515 .probe = vidi_probe, 516 .remove = vidi_remove, 517 .driver = { 518 .name = "exynos-drm-vidi", 519 .owner = THIS_MODULE, 520 }, 521 }; 522