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