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(struct timer_list *t) 165 { 166 struct vidi_context *ctx = from_timer(ctx, t, timer); 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 .fill_modes = drm_helper_probe_single_connector_modes, 293 .detect = vidi_detect, 294 .destroy = vidi_connector_destroy, 295 .reset = drm_atomic_helper_connector_reset, 296 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 297 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 298 }; 299 300 static int vidi_get_modes(struct drm_connector *connector) 301 { 302 struct vidi_context *ctx = ctx_from_connector(connector); 303 struct edid *edid; 304 int edid_len; 305 306 /* 307 * the edid data comes from user side and it would be set 308 * to ctx->raw_edid through specific ioctl. 309 */ 310 if (!ctx->raw_edid) { 311 DRM_DEBUG_KMS("raw_edid is null.\n"); 312 return -EFAULT; 313 } 314 315 edid_len = (1 + ctx->raw_edid->extensions) * EDID_LENGTH; 316 edid = kmemdup(ctx->raw_edid, edid_len, GFP_KERNEL); 317 if (!edid) { 318 DRM_DEBUG_KMS("failed to allocate edid\n"); 319 return -ENOMEM; 320 } 321 322 drm_mode_connector_update_edid_property(connector, edid); 323 324 return drm_add_edid_modes(connector, edid); 325 } 326 327 static const struct drm_connector_helper_funcs vidi_connector_helper_funcs = { 328 .get_modes = vidi_get_modes, 329 }; 330 331 static int vidi_create_connector(struct drm_encoder *encoder) 332 { 333 struct vidi_context *ctx = encoder_to_vidi(encoder); 334 struct drm_connector *connector = &ctx->connector; 335 int ret; 336 337 connector->polled = DRM_CONNECTOR_POLL_HPD; 338 339 ret = drm_connector_init(ctx->drm_dev, connector, 340 &vidi_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL); 341 if (ret) { 342 DRM_ERROR("Failed to initialize connector with drm\n"); 343 return ret; 344 } 345 346 drm_connector_helper_add(connector, &vidi_connector_helper_funcs); 347 drm_mode_connector_attach_encoder(connector, encoder); 348 349 return 0; 350 } 351 352 static void exynos_vidi_mode_set(struct drm_encoder *encoder, 353 struct drm_display_mode *mode, 354 struct drm_display_mode *adjusted_mode) 355 { 356 } 357 358 static void exynos_vidi_enable(struct drm_encoder *encoder) 359 { 360 } 361 362 static void exynos_vidi_disable(struct drm_encoder *encoder) 363 { 364 } 365 366 static const struct drm_encoder_helper_funcs exynos_vidi_encoder_helper_funcs = { 367 .mode_set = exynos_vidi_mode_set, 368 .enable = exynos_vidi_enable, 369 .disable = exynos_vidi_disable, 370 }; 371 372 static const struct drm_encoder_funcs exynos_vidi_encoder_funcs = { 373 .destroy = drm_encoder_cleanup, 374 }; 375 376 static int vidi_bind(struct device *dev, struct device *master, void *data) 377 { 378 struct vidi_context *ctx = dev_get_drvdata(dev); 379 struct drm_device *drm_dev = data; 380 struct drm_encoder *encoder = &ctx->encoder; 381 struct exynos_drm_plane *exynos_plane; 382 struct exynos_drm_plane_config plane_config = { 0 }; 383 unsigned int i; 384 int ret; 385 386 ctx->drm_dev = drm_dev; 387 388 plane_config.pixel_formats = formats; 389 plane_config.num_pixel_formats = ARRAY_SIZE(formats); 390 391 for (i = 0; i < WINDOWS_NR; i++) { 392 plane_config.zpos = i; 393 plane_config.type = vidi_win_types[i]; 394 395 ret = exynos_plane_init(drm_dev, &ctx->planes[i], i, 396 &plane_config); 397 if (ret) 398 return ret; 399 } 400 401 exynos_plane = &ctx->planes[DEFAULT_WIN]; 402 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base, 403 EXYNOS_DISPLAY_TYPE_VIDI, &vidi_crtc_ops, ctx); 404 if (IS_ERR(ctx->crtc)) { 405 DRM_ERROR("failed to create crtc.\n"); 406 return PTR_ERR(ctx->crtc); 407 } 408 409 drm_encoder_init(drm_dev, encoder, &exynos_vidi_encoder_funcs, 410 DRM_MODE_ENCODER_TMDS, NULL); 411 412 drm_encoder_helper_add(encoder, &exynos_vidi_encoder_helper_funcs); 413 414 ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_VIDI); 415 if (ret < 0) 416 return ret; 417 418 ret = vidi_create_connector(encoder); 419 if (ret) { 420 DRM_ERROR("failed to create connector ret = %d\n", ret); 421 drm_encoder_cleanup(encoder); 422 return ret; 423 } 424 425 return 0; 426 } 427 428 429 static void vidi_unbind(struct device *dev, struct device *master, void *data) 430 { 431 struct vidi_context *ctx = dev_get_drvdata(dev); 432 433 del_timer_sync(&ctx->timer); 434 } 435 436 static const struct component_ops vidi_component_ops = { 437 .bind = vidi_bind, 438 .unbind = vidi_unbind, 439 }; 440 441 static int vidi_probe(struct platform_device *pdev) 442 { 443 struct vidi_context *ctx; 444 int ret; 445 446 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); 447 if (!ctx) 448 return -ENOMEM; 449 450 ctx->pdev = pdev; 451 452 timer_setup(&ctx->timer, vidi_fake_vblank_timer, 0); 453 454 mutex_init(&ctx->lock); 455 456 platform_set_drvdata(pdev, ctx); 457 458 ret = device_create_file(&pdev->dev, &dev_attr_connection); 459 if (ret < 0) { 460 DRM_ERROR("failed to create connection sysfs.\n"); 461 return ret; 462 } 463 464 ret = component_add(&pdev->dev, &vidi_component_ops); 465 if (ret) 466 goto err_remove_file; 467 468 return ret; 469 470 err_remove_file: 471 device_remove_file(&pdev->dev, &dev_attr_connection); 472 473 return ret; 474 } 475 476 static int vidi_remove(struct platform_device *pdev) 477 { 478 struct vidi_context *ctx = platform_get_drvdata(pdev); 479 480 if (ctx->raw_edid != (struct edid *)fake_edid_info) { 481 kfree(ctx->raw_edid); 482 ctx->raw_edid = NULL; 483 484 return -EINVAL; 485 } 486 487 component_del(&pdev->dev, &vidi_component_ops); 488 489 return 0; 490 } 491 492 struct platform_driver vidi_driver = { 493 .probe = vidi_probe, 494 .remove = vidi_remove, 495 .driver = { 496 .name = "exynos-drm-vidi", 497 .owner = THIS_MODULE, 498 }, 499 }; 500