1 /* 2 * V4L2 deinterlacing support. 3 * 4 * Copyright (c) 2012 Vista Silicon S.L. 5 * Javier Martin <javier.martin@vista-silicon.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the 10 * License, or (at your option) any later version 11 */ 12 13 #include <linux/module.h> 14 #include <linux/slab.h> 15 #include <linux/interrupt.h> 16 #include <linux/dmaengine.h> 17 #include <linux/platform_device.h> 18 19 #include <media/v4l2-mem2mem.h> 20 #include <media/v4l2-device.h> 21 #include <media/v4l2-ioctl.h> 22 #include <media/videobuf2-dma-contig.h> 23 24 #define MEM2MEM_TEST_MODULE_NAME "mem2mem-deinterlace" 25 26 MODULE_DESCRIPTION("mem2mem device which supports deinterlacing using dmaengine"); 27 MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com"); 28 MODULE_LICENSE("GPL"); 29 MODULE_VERSION("0.0.1"); 30 31 static bool debug; 32 module_param(debug, bool, 0644); 33 34 /* Flags that indicate a format can be used for capture/output */ 35 #define MEM2MEM_CAPTURE (1 << 0) 36 #define MEM2MEM_OUTPUT (1 << 1) 37 38 #define MEM2MEM_NAME "m2m-deinterlace" 39 40 #define dprintk(dev, fmt, arg...) \ 41 v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg) 42 43 struct deinterlace_fmt { 44 char *name; 45 u32 fourcc; 46 /* Types the format can be used for */ 47 u32 types; 48 }; 49 50 static struct deinterlace_fmt formats[] = { 51 { 52 .name = "YUV 4:2:0 Planar", 53 .fourcc = V4L2_PIX_FMT_YUV420, 54 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT, 55 }, 56 { 57 .name = "YUYV 4:2:2", 58 .fourcc = V4L2_PIX_FMT_YUYV, 59 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT, 60 }, 61 }; 62 63 #define NUM_FORMATS ARRAY_SIZE(formats) 64 65 /* Per-queue, driver-specific private data */ 66 struct deinterlace_q_data { 67 unsigned int width; 68 unsigned int height; 69 unsigned int sizeimage; 70 struct deinterlace_fmt *fmt; 71 enum v4l2_field field; 72 }; 73 74 enum { 75 V4L2_M2M_SRC = 0, 76 V4L2_M2M_DST = 1, 77 }; 78 79 enum { 80 YUV420_DMA_Y_ODD, 81 YUV420_DMA_Y_EVEN, 82 YUV420_DMA_U_ODD, 83 YUV420_DMA_U_EVEN, 84 YUV420_DMA_V_ODD, 85 YUV420_DMA_V_EVEN, 86 YUV420_DMA_Y_ODD_DOUBLING, 87 YUV420_DMA_U_ODD_DOUBLING, 88 YUV420_DMA_V_ODD_DOUBLING, 89 YUYV_DMA_ODD, 90 YUYV_DMA_EVEN, 91 YUYV_DMA_EVEN_DOUBLING, 92 }; 93 94 /* Source and destination queue data */ 95 static struct deinterlace_q_data q_data[2]; 96 97 static struct deinterlace_q_data *get_q_data(enum v4l2_buf_type type) 98 { 99 switch (type) { 100 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 101 return &q_data[V4L2_M2M_SRC]; 102 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 103 return &q_data[V4L2_M2M_DST]; 104 default: 105 BUG(); 106 } 107 return NULL; 108 } 109 110 static struct deinterlace_fmt *find_format(struct v4l2_format *f) 111 { 112 struct deinterlace_fmt *fmt; 113 unsigned int k; 114 115 for (k = 0; k < NUM_FORMATS; k++) { 116 fmt = &formats[k]; 117 if ((fmt->types & f->type) && 118 (fmt->fourcc == f->fmt.pix.pixelformat)) 119 break; 120 } 121 122 if (k == NUM_FORMATS) 123 return NULL; 124 125 return &formats[k]; 126 } 127 128 struct deinterlace_dev { 129 struct v4l2_device v4l2_dev; 130 struct video_device *vfd; 131 132 atomic_t busy; 133 struct mutex dev_mutex; 134 spinlock_t irqlock; 135 136 struct dma_chan *dma_chan; 137 138 struct v4l2_m2m_dev *m2m_dev; 139 struct vb2_alloc_ctx *alloc_ctx; 140 }; 141 142 struct deinterlace_ctx { 143 struct deinterlace_dev *dev; 144 145 /* Abort requested by m2m */ 146 int aborting; 147 enum v4l2_colorspace colorspace; 148 dma_cookie_t cookie; 149 struct v4l2_m2m_ctx *m2m_ctx; 150 struct dma_interleaved_template *xt; 151 }; 152 153 /* 154 * mem2mem callbacks 155 */ 156 static int deinterlace_job_ready(void *priv) 157 { 158 struct deinterlace_ctx *ctx = priv; 159 struct deinterlace_dev *pcdev = ctx->dev; 160 161 if ((v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) > 0) 162 && (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) > 0) 163 && (atomic_read(&ctx->dev->busy) == 0)) { 164 dprintk(pcdev, "Task ready\n"); 165 return 1; 166 } 167 168 dprintk(pcdev, "Task not ready to run\n"); 169 170 return 0; 171 } 172 173 static void deinterlace_job_abort(void *priv) 174 { 175 struct deinterlace_ctx *ctx = priv; 176 struct deinterlace_dev *pcdev = ctx->dev; 177 178 ctx->aborting = 1; 179 180 dprintk(pcdev, "Aborting task\n"); 181 182 v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx); 183 } 184 185 static void deinterlace_lock(void *priv) 186 { 187 struct deinterlace_ctx *ctx = priv; 188 struct deinterlace_dev *pcdev = ctx->dev; 189 mutex_lock(&pcdev->dev_mutex); 190 } 191 192 static void deinterlace_unlock(void *priv) 193 { 194 struct deinterlace_ctx *ctx = priv; 195 struct deinterlace_dev *pcdev = ctx->dev; 196 mutex_unlock(&pcdev->dev_mutex); 197 } 198 199 static void dma_callback(void *data) 200 { 201 struct deinterlace_ctx *curr_ctx = data; 202 struct deinterlace_dev *pcdev = curr_ctx->dev; 203 struct vb2_buffer *src_vb, *dst_vb; 204 205 atomic_set(&pcdev->busy, 0); 206 207 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx); 208 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx); 209 210 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE); 211 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE); 212 213 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx); 214 215 dprintk(pcdev, "dma transfers completed.\n"); 216 } 217 218 static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op, 219 int do_callback) 220 { 221 struct deinterlace_q_data *s_q_data; 222 struct vb2_buffer *src_buf, *dst_buf; 223 struct deinterlace_dev *pcdev = ctx->dev; 224 struct dma_chan *chan = pcdev->dma_chan; 225 struct dma_device *dmadev = chan->device; 226 struct dma_async_tx_descriptor *tx; 227 unsigned int s_width, s_height; 228 unsigned int s_size; 229 dma_addr_t p_in, p_out; 230 enum dma_ctrl_flags flags; 231 232 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx); 233 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx); 234 235 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); 236 s_width = s_q_data->width; 237 s_height = s_q_data->height; 238 s_size = s_width * s_height; 239 240 p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(src_buf, 0); 241 p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(dst_buf, 0); 242 if (!p_in || !p_out) { 243 v4l2_err(&pcdev->v4l2_dev, 244 "Acquiring kernel pointers to buffers failed\n"); 245 return; 246 } 247 248 switch (op) { 249 case YUV420_DMA_Y_ODD: 250 ctx->xt->numf = s_height / 2; 251 ctx->xt->sgl[0].size = s_width; 252 ctx->xt->sgl[0].icg = s_width; 253 ctx->xt->src_start = p_in; 254 ctx->xt->dst_start = p_out; 255 break; 256 case YUV420_DMA_Y_EVEN: 257 ctx->xt->numf = s_height / 2; 258 ctx->xt->sgl[0].size = s_width; 259 ctx->xt->sgl[0].icg = s_width; 260 ctx->xt->src_start = p_in + s_size / 2; 261 ctx->xt->dst_start = p_out + s_width; 262 break; 263 case YUV420_DMA_U_ODD: 264 ctx->xt->numf = s_height / 4; 265 ctx->xt->sgl[0].size = s_width / 2; 266 ctx->xt->sgl[0].icg = s_width / 2; 267 ctx->xt->src_start = p_in + s_size; 268 ctx->xt->dst_start = p_out + s_size; 269 break; 270 case YUV420_DMA_U_EVEN: 271 ctx->xt->numf = s_height / 4; 272 ctx->xt->sgl[0].size = s_width / 2; 273 ctx->xt->sgl[0].icg = s_width / 2; 274 ctx->xt->src_start = p_in + (9 * s_size) / 8; 275 ctx->xt->dst_start = p_out + s_size + s_width / 2; 276 break; 277 case YUV420_DMA_V_ODD: 278 ctx->xt->numf = s_height / 4; 279 ctx->xt->sgl[0].size = s_width / 2; 280 ctx->xt->sgl[0].icg = s_width / 2; 281 ctx->xt->src_start = p_in + (5 * s_size) / 4; 282 ctx->xt->dst_start = p_out + (5 * s_size) / 4; 283 break; 284 case YUV420_DMA_V_EVEN: 285 ctx->xt->numf = s_height / 4; 286 ctx->xt->sgl[0].size = s_width / 2; 287 ctx->xt->sgl[0].icg = s_width / 2; 288 ctx->xt->src_start = p_in + (11 * s_size) / 8; 289 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2; 290 break; 291 case YUV420_DMA_Y_ODD_DOUBLING: 292 ctx->xt->numf = s_height / 2; 293 ctx->xt->sgl[0].size = s_width; 294 ctx->xt->sgl[0].icg = s_width; 295 ctx->xt->src_start = p_in; 296 ctx->xt->dst_start = p_out + s_width; 297 break; 298 case YUV420_DMA_U_ODD_DOUBLING: 299 ctx->xt->numf = s_height / 4; 300 ctx->xt->sgl[0].size = s_width / 2; 301 ctx->xt->sgl[0].icg = s_width / 2; 302 ctx->xt->src_start = p_in + s_size; 303 ctx->xt->dst_start = p_out + s_size + s_width / 2; 304 break; 305 case YUV420_DMA_V_ODD_DOUBLING: 306 ctx->xt->numf = s_height / 4; 307 ctx->xt->sgl[0].size = s_width / 2; 308 ctx->xt->sgl[0].icg = s_width / 2; 309 ctx->xt->src_start = p_in + (5 * s_size) / 4; 310 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2; 311 break; 312 case YUYV_DMA_ODD: 313 ctx->xt->numf = s_height / 2; 314 ctx->xt->sgl[0].size = s_width * 2; 315 ctx->xt->sgl[0].icg = s_width * 2; 316 ctx->xt->src_start = p_in; 317 ctx->xt->dst_start = p_out; 318 break; 319 case YUYV_DMA_EVEN: 320 ctx->xt->numf = s_height / 2; 321 ctx->xt->sgl[0].size = s_width * 2; 322 ctx->xt->sgl[0].icg = s_width * 2; 323 ctx->xt->src_start = p_in + s_size; 324 ctx->xt->dst_start = p_out + s_width * 2; 325 break; 326 case YUYV_DMA_EVEN_DOUBLING: 327 default: 328 ctx->xt->numf = s_height / 2; 329 ctx->xt->sgl[0].size = s_width * 2; 330 ctx->xt->sgl[0].icg = s_width * 2; 331 ctx->xt->src_start = p_in; 332 ctx->xt->dst_start = p_out + s_width * 2; 333 break; 334 } 335 336 /* Common parameters for al transfers */ 337 ctx->xt->frame_size = 1; 338 ctx->xt->dir = DMA_MEM_TO_MEM; 339 ctx->xt->src_sgl = false; 340 ctx->xt->dst_sgl = true; 341 flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT | 342 DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SKIP_SRC_UNMAP; 343 344 tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags); 345 if (tx == NULL) { 346 v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n"); 347 return; 348 } 349 350 if (do_callback) { 351 tx->callback = dma_callback; 352 tx->callback_param = ctx; 353 } 354 355 ctx->cookie = dmaengine_submit(tx); 356 if (dma_submit_error(ctx->cookie)) { 357 v4l2_warn(&pcdev->v4l2_dev, 358 "DMA submit error %d with src=0x%x dst=0x%x len=0x%x\n", 359 ctx->cookie, (unsigned)p_in, (unsigned)p_out, 360 s_size * 3/2); 361 return; 362 } 363 364 dma_async_issue_pending(chan); 365 } 366 367 static void deinterlace_device_run(void *priv) 368 { 369 struct deinterlace_ctx *ctx = priv; 370 struct deinterlace_q_data *dst_q_data; 371 372 atomic_set(&ctx->dev->busy, 1); 373 374 dprintk(ctx->dev, "%s: DMA try issue.\n", __func__); 375 376 dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE); 377 378 /* 379 * 4 possible field conversions are possible at the moment: 380 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_INTERLACED_TB: 381 * two separate fields in the same input buffer are interlaced 382 * in the output buffer using weaving. Top field comes first. 383 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_NONE: 384 * top field from the input buffer is copied to the output buffer 385 * using line doubling. Bottom field from the input buffer is discarded. 386 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_INTERLACED_BT: 387 * two separate fields in the same input buffer are interlaced 388 * in the output buffer using weaving. Bottom field comes first. 389 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_NONE: 390 * bottom field from the input buffer is copied to the output buffer 391 * using line doubling. Top field from the input buffer is discarded. 392 */ 393 switch (dst_q_data->fmt->fourcc) { 394 case V4L2_PIX_FMT_YUV420: 395 switch (dst_q_data->field) { 396 case V4L2_FIELD_INTERLACED_TB: 397 case V4L2_FIELD_INTERLACED_BT: 398 dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n", 399 __func__); 400 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0); 401 deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0); 402 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0); 403 deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0); 404 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0); 405 deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1); 406 break; 407 case V4L2_FIELD_NONE: 408 default: 409 dprintk(ctx->dev, "%s: yuv420 interlaced line doubling.\n", 410 __func__); 411 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0); 412 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING, 0); 413 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0); 414 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING, 0); 415 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0); 416 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING, 1); 417 break; 418 } 419 break; 420 case V4L2_PIX_FMT_YUYV: 421 default: 422 switch (dst_q_data->field) { 423 case V4L2_FIELD_INTERLACED_TB: 424 case V4L2_FIELD_INTERLACED_BT: 425 dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n", 426 __func__); 427 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0); 428 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1); 429 break; 430 case V4L2_FIELD_NONE: 431 default: 432 dprintk(ctx->dev, "%s: yuyv interlaced line doubling.\n", 433 __func__); 434 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0); 435 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1); 436 break; 437 } 438 break; 439 } 440 441 dprintk(ctx->dev, "%s: DMA issue done.\n", __func__); 442 } 443 444 /* 445 * video ioctls 446 */ 447 static int vidioc_querycap(struct file *file, void *priv, 448 struct v4l2_capability *cap) 449 { 450 strlcpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver)); 451 strlcpy(cap->card, MEM2MEM_NAME, sizeof(cap->card)); 452 strlcpy(cap->bus_info, MEM2MEM_NAME, sizeof(cap->card)); 453 /* 454 * This is only a mem-to-mem video device. The capture and output 455 * device capability flags are left only for backward compatibility 456 * and are scheduled for removal. 457 */ 458 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT | 459 V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING; 460 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 461 462 return 0; 463 } 464 465 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type) 466 { 467 int i, num; 468 struct deinterlace_fmt *fmt; 469 470 num = 0; 471 472 for (i = 0; i < NUM_FORMATS; ++i) { 473 if (formats[i].types & type) { 474 /* index-th format of type type found ? */ 475 if (num == f->index) 476 break; 477 /* Correct type but haven't reached our index yet, 478 * just increment per-type index */ 479 ++num; 480 } 481 } 482 483 if (i < NUM_FORMATS) { 484 /* Format found */ 485 fmt = &formats[i]; 486 strlcpy(f->description, fmt->name, sizeof(f->description)); 487 f->pixelformat = fmt->fourcc; 488 return 0; 489 } 490 491 /* Format not found */ 492 return -EINVAL; 493 } 494 495 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 496 struct v4l2_fmtdesc *f) 497 { 498 return enum_fmt(f, MEM2MEM_CAPTURE); 499 } 500 501 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv, 502 struct v4l2_fmtdesc *f) 503 { 504 return enum_fmt(f, MEM2MEM_OUTPUT); 505 } 506 507 static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f) 508 { 509 struct vb2_queue *vq; 510 struct deinterlace_q_data *q_data; 511 512 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); 513 if (!vq) 514 return -EINVAL; 515 516 q_data = get_q_data(f->type); 517 518 f->fmt.pix.width = q_data->width; 519 f->fmt.pix.height = q_data->height; 520 f->fmt.pix.field = q_data->field; 521 f->fmt.pix.pixelformat = q_data->fmt->fourcc; 522 523 switch (q_data->fmt->fourcc) { 524 case V4L2_PIX_FMT_YUV420: 525 f->fmt.pix.bytesperline = q_data->width * 3 / 2; 526 break; 527 case V4L2_PIX_FMT_YUYV: 528 default: 529 f->fmt.pix.bytesperline = q_data->width * 2; 530 } 531 532 f->fmt.pix.sizeimage = q_data->sizeimage; 533 f->fmt.pix.colorspace = ctx->colorspace; 534 535 return 0; 536 } 537 538 static int vidioc_g_fmt_vid_out(struct file *file, void *priv, 539 struct v4l2_format *f) 540 { 541 return vidioc_g_fmt(priv, f); 542 } 543 544 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 545 struct v4l2_format *f) 546 { 547 return vidioc_g_fmt(priv, f); 548 } 549 550 static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt) 551 { 552 switch (f->fmt.pix.pixelformat) { 553 case V4L2_PIX_FMT_YUV420: 554 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2; 555 break; 556 case V4L2_PIX_FMT_YUYV: 557 default: 558 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 559 } 560 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; 561 562 return 0; 563 } 564 565 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 566 struct v4l2_format *f) 567 { 568 struct deinterlace_fmt *fmt; 569 struct deinterlace_ctx *ctx = priv; 570 571 fmt = find_format(f); 572 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) 573 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420; 574 575 f->fmt.pix.colorspace = ctx->colorspace; 576 577 if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB && 578 f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT && 579 f->fmt.pix.field != V4L2_FIELD_NONE) 580 f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB; 581 582 return vidioc_try_fmt(f, fmt); 583 } 584 585 static int vidioc_try_fmt_vid_out(struct file *file, void *priv, 586 struct v4l2_format *f) 587 { 588 struct deinterlace_fmt *fmt; 589 590 fmt = find_format(f); 591 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) 592 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420; 593 594 if (!f->fmt.pix.colorspace) 595 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709; 596 597 if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB && 598 f->fmt.pix.field != V4L2_FIELD_SEQ_BT) 599 f->fmt.pix.field = V4L2_FIELD_SEQ_TB; 600 601 return vidioc_try_fmt(f, fmt); 602 } 603 604 static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f) 605 { 606 struct deinterlace_q_data *q_data; 607 struct vb2_queue *vq; 608 609 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); 610 if (!vq) 611 return -EINVAL; 612 613 q_data = get_q_data(f->type); 614 if (!q_data) 615 return -EINVAL; 616 617 if (vb2_is_busy(vq)) { 618 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__); 619 return -EBUSY; 620 } 621 622 q_data->fmt = find_format(f); 623 if (!q_data->fmt) { 624 v4l2_err(&ctx->dev->v4l2_dev, 625 "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n", 626 f->type, f->fmt.pix.width, f->fmt.pix.height, 627 f->fmt.pix.pixelformat, f->fmt.pix.field); 628 return -EINVAL; 629 } 630 631 q_data->width = f->fmt.pix.width; 632 q_data->height = f->fmt.pix.height; 633 q_data->field = f->fmt.pix.field; 634 635 switch (f->fmt.pix.pixelformat) { 636 case V4L2_PIX_FMT_YUV420: 637 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2; 638 q_data->sizeimage = (q_data->width * q_data->height * 3) / 2; 639 break; 640 case V4L2_PIX_FMT_YUYV: 641 default: 642 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 643 q_data->sizeimage = q_data->width * q_data->height * 2; 644 } 645 646 dprintk(ctx->dev, 647 "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n", 648 f->type, q_data->width, q_data->height, q_data->fmt->fourcc, 649 q_data->field); 650 651 return 0; 652 } 653 654 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 655 struct v4l2_format *f) 656 { 657 int ret; 658 659 ret = vidioc_try_fmt_vid_cap(file, priv, f); 660 if (ret) 661 return ret; 662 return vidioc_s_fmt(priv, f); 663 } 664 665 static int vidioc_s_fmt_vid_out(struct file *file, void *priv, 666 struct v4l2_format *f) 667 { 668 struct deinterlace_ctx *ctx = priv; 669 int ret; 670 671 ret = vidioc_try_fmt_vid_out(file, priv, f); 672 if (ret) 673 return ret; 674 675 ret = vidioc_s_fmt(priv, f); 676 if (!ret) 677 ctx->colorspace = f->fmt.pix.colorspace; 678 679 return ret; 680 } 681 682 static int vidioc_reqbufs(struct file *file, void *priv, 683 struct v4l2_requestbuffers *reqbufs) 684 { 685 struct deinterlace_ctx *ctx = priv; 686 687 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs); 688 } 689 690 static int vidioc_querybuf(struct file *file, void *priv, 691 struct v4l2_buffer *buf) 692 { 693 struct deinterlace_ctx *ctx = priv; 694 695 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf); 696 } 697 698 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) 699 { 700 struct deinterlace_ctx *ctx = priv; 701 702 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf); 703 } 704 705 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf) 706 { 707 struct deinterlace_ctx *ctx = priv; 708 709 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf); 710 } 711 712 static int vidioc_streamon(struct file *file, void *priv, 713 enum v4l2_buf_type type) 714 { 715 struct deinterlace_q_data *s_q_data, *d_q_data; 716 struct deinterlace_ctx *ctx = priv; 717 718 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); 719 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE); 720 721 /* Check that src and dst queues have the same pix format */ 722 if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) { 723 v4l2_err(&ctx->dev->v4l2_dev, 724 "src and dst formats don't match.\n"); 725 return -EINVAL; 726 } 727 728 /* Check that input and output deinterlacing types are compatible */ 729 switch (s_q_data->field) { 730 case V4L2_FIELD_SEQ_BT: 731 if (d_q_data->field != V4L2_FIELD_NONE && 732 d_q_data->field != V4L2_FIELD_INTERLACED_BT) { 733 v4l2_err(&ctx->dev->v4l2_dev, 734 "src and dst field conversion [(%d)->(%d)] not supported.\n", 735 s_q_data->field, d_q_data->field); 736 return -EINVAL; 737 } 738 break; 739 case V4L2_FIELD_SEQ_TB: 740 if (d_q_data->field != V4L2_FIELD_NONE && 741 d_q_data->field != V4L2_FIELD_INTERLACED_TB) { 742 v4l2_err(&ctx->dev->v4l2_dev, 743 "src and dst field conversion [(%d)->(%d)] not supported.\n", 744 s_q_data->field, d_q_data->field); 745 return -EINVAL; 746 } 747 break; 748 default: 749 return -EINVAL; 750 } 751 752 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type); 753 } 754 755 static int vidioc_streamoff(struct file *file, void *priv, 756 enum v4l2_buf_type type) 757 { 758 struct deinterlace_ctx *ctx = priv; 759 760 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type); 761 } 762 763 static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = { 764 .vidioc_querycap = vidioc_querycap, 765 766 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 767 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 768 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 769 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 770 771 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out, 772 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out, 773 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out, 774 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out, 775 776 .vidioc_reqbufs = vidioc_reqbufs, 777 .vidioc_querybuf = vidioc_querybuf, 778 779 .vidioc_qbuf = vidioc_qbuf, 780 .vidioc_dqbuf = vidioc_dqbuf, 781 782 .vidioc_streamon = vidioc_streamon, 783 .vidioc_streamoff = vidioc_streamoff, 784 }; 785 786 787 /* 788 * Queue operations 789 */ 790 struct vb2_dc_conf { 791 struct device *dev; 792 }; 793 794 static int deinterlace_queue_setup(struct vb2_queue *vq, 795 const struct v4l2_format *fmt, 796 unsigned int *nbuffers, unsigned int *nplanes, 797 unsigned int sizes[], void *alloc_ctxs[]) 798 { 799 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq); 800 struct deinterlace_q_data *q_data; 801 unsigned int size, count = *nbuffers; 802 803 q_data = get_q_data(vq->type); 804 805 switch (q_data->fmt->fourcc) { 806 case V4L2_PIX_FMT_YUV420: 807 size = q_data->width * q_data->height * 3 / 2; 808 break; 809 case V4L2_PIX_FMT_YUYV: 810 default: 811 size = q_data->width * q_data->height * 2; 812 } 813 814 *nplanes = 1; 815 *nbuffers = count; 816 sizes[0] = size; 817 818 alloc_ctxs[0] = ctx->dev->alloc_ctx; 819 820 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size); 821 822 return 0; 823 } 824 825 static int deinterlace_buf_prepare(struct vb2_buffer *vb) 826 { 827 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 828 struct deinterlace_q_data *q_data; 829 830 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type); 831 832 q_data = get_q_data(vb->vb2_queue->type); 833 834 if (vb2_plane_size(vb, 0) < q_data->sizeimage) { 835 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n", 836 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage); 837 return -EINVAL; 838 } 839 840 vb2_set_plane_payload(vb, 0, q_data->sizeimage); 841 842 return 0; 843 } 844 845 static void deinterlace_buf_queue(struct vb2_buffer *vb) 846 { 847 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 848 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb); 849 } 850 851 static struct vb2_ops deinterlace_qops = { 852 .queue_setup = deinterlace_queue_setup, 853 .buf_prepare = deinterlace_buf_prepare, 854 .buf_queue = deinterlace_buf_queue, 855 }; 856 857 static int queue_init(void *priv, struct vb2_queue *src_vq, 858 struct vb2_queue *dst_vq) 859 { 860 struct deinterlace_ctx *ctx = priv; 861 int ret; 862 863 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 864 src_vq->io_modes = VB2_MMAP | VB2_USERPTR; 865 src_vq->drv_priv = ctx; 866 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); 867 src_vq->ops = &deinterlace_qops; 868 src_vq->mem_ops = &vb2_dma_contig_memops; 869 q_data[V4L2_M2M_SRC].fmt = &formats[0]; 870 q_data[V4L2_M2M_SRC].width = 640; 871 q_data[V4L2_M2M_SRC].height = 480; 872 q_data[V4L2_M2M_SRC].sizeimage = (640 * 480 * 3) / 2; 873 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_SEQ_TB; 874 875 ret = vb2_queue_init(src_vq); 876 if (ret) 877 return ret; 878 879 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 880 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR; 881 dst_vq->drv_priv = ctx; 882 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); 883 dst_vq->ops = &deinterlace_qops; 884 dst_vq->mem_ops = &vb2_dma_contig_memops; 885 q_data[V4L2_M2M_DST].fmt = &formats[0]; 886 q_data[V4L2_M2M_DST].width = 640; 887 q_data[V4L2_M2M_DST].height = 480; 888 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2; 889 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB; 890 891 return vb2_queue_init(dst_vq); 892 } 893 894 /* 895 * File operations 896 */ 897 static int deinterlace_open(struct file *file) 898 { 899 struct deinterlace_dev *pcdev = video_drvdata(file); 900 struct deinterlace_ctx *ctx = NULL; 901 902 ctx = kzalloc(sizeof *ctx, GFP_KERNEL); 903 if (!ctx) 904 return -ENOMEM; 905 906 file->private_data = ctx; 907 ctx->dev = pcdev; 908 909 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init); 910 if (IS_ERR(ctx->m2m_ctx)) { 911 int ret = PTR_ERR(ctx->m2m_ctx); 912 913 kfree(ctx); 914 return ret; 915 } 916 917 ctx->xt = kzalloc(sizeof(struct dma_async_tx_descriptor) + 918 sizeof(struct data_chunk), GFP_KERNEL); 919 if (!ctx->xt) { 920 kfree(ctx); 921 return -ENOMEM; 922 } 923 924 ctx->colorspace = V4L2_COLORSPACE_REC709; 925 926 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx); 927 928 return 0; 929 } 930 931 static int deinterlace_release(struct file *file) 932 { 933 struct deinterlace_dev *pcdev = video_drvdata(file); 934 struct deinterlace_ctx *ctx = file->private_data; 935 936 dprintk(pcdev, "Releasing instance %p\n", ctx); 937 938 v4l2_m2m_ctx_release(ctx->m2m_ctx); 939 kfree(ctx->xt); 940 kfree(ctx); 941 942 return 0; 943 } 944 945 static unsigned int deinterlace_poll(struct file *file, 946 struct poll_table_struct *wait) 947 { 948 struct deinterlace_ctx *ctx = file->private_data; 949 int ret; 950 951 deinterlace_lock(ctx); 952 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait); 953 deinterlace_unlock(ctx); 954 955 return ret; 956 } 957 958 static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma) 959 { 960 struct deinterlace_ctx *ctx = file->private_data; 961 962 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); 963 } 964 965 static const struct v4l2_file_operations deinterlace_fops = { 966 .owner = THIS_MODULE, 967 .open = deinterlace_open, 968 .release = deinterlace_release, 969 .poll = deinterlace_poll, 970 .unlocked_ioctl = video_ioctl2, 971 .mmap = deinterlace_mmap, 972 }; 973 974 static struct video_device deinterlace_videodev = { 975 .name = MEM2MEM_NAME, 976 .fops = &deinterlace_fops, 977 .ioctl_ops = &deinterlace_ioctl_ops, 978 .minor = -1, 979 .release = video_device_release, 980 .vfl_dir = VFL_DIR_M2M, 981 }; 982 983 static struct v4l2_m2m_ops m2m_ops = { 984 .device_run = deinterlace_device_run, 985 .job_ready = deinterlace_job_ready, 986 .job_abort = deinterlace_job_abort, 987 .lock = deinterlace_lock, 988 .unlock = deinterlace_unlock, 989 }; 990 991 static int deinterlace_probe(struct platform_device *pdev) 992 { 993 struct deinterlace_dev *pcdev; 994 struct video_device *vfd; 995 dma_cap_mask_t mask; 996 int ret = 0; 997 998 pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL); 999 if (!pcdev) 1000 return -ENOMEM; 1001 1002 spin_lock_init(&pcdev->irqlock); 1003 1004 dma_cap_zero(mask); 1005 dma_cap_set(DMA_INTERLEAVE, mask); 1006 pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev); 1007 if (!pcdev->dma_chan) 1008 goto free_dev; 1009 1010 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) { 1011 v4l2_err(&pcdev->v4l2_dev, "DMA does not support INTERLEAVE\n"); 1012 goto rel_dma; 1013 } 1014 1015 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev); 1016 if (ret) 1017 goto rel_dma; 1018 1019 atomic_set(&pcdev->busy, 0); 1020 mutex_init(&pcdev->dev_mutex); 1021 1022 vfd = video_device_alloc(); 1023 if (!vfd) { 1024 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n"); 1025 ret = -ENOMEM; 1026 goto unreg_dev; 1027 } 1028 1029 *vfd = deinterlace_videodev; 1030 vfd->lock = &pcdev->dev_mutex; 1031 1032 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0); 1033 if (ret) { 1034 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n"); 1035 goto rel_vdev; 1036 } 1037 1038 video_set_drvdata(vfd, pcdev); 1039 snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name); 1040 pcdev->vfd = vfd; 1041 v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME 1042 " Device registered as /dev/video%d\n", vfd->num); 1043 1044 platform_set_drvdata(pdev, pcdev); 1045 1046 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); 1047 if (IS_ERR(pcdev->alloc_ctx)) { 1048 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n"); 1049 ret = PTR_ERR(pcdev->alloc_ctx); 1050 goto err_ctx; 1051 } 1052 1053 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops); 1054 if (IS_ERR(pcdev->m2m_dev)) { 1055 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n"); 1056 ret = PTR_ERR(pcdev->m2m_dev); 1057 goto err_m2m; 1058 } 1059 1060 return 0; 1061 1062 v4l2_m2m_release(pcdev->m2m_dev); 1063 err_m2m: 1064 video_unregister_device(pcdev->vfd); 1065 err_ctx: 1066 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); 1067 rel_vdev: 1068 video_device_release(vfd); 1069 unreg_dev: 1070 v4l2_device_unregister(&pcdev->v4l2_dev); 1071 rel_dma: 1072 dma_release_channel(pcdev->dma_chan); 1073 free_dev: 1074 kfree(pcdev); 1075 1076 return ret; 1077 } 1078 1079 static int deinterlace_remove(struct platform_device *pdev) 1080 { 1081 struct deinterlace_dev *pcdev = 1082 (struct deinterlace_dev *)platform_get_drvdata(pdev); 1083 1084 v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME); 1085 v4l2_m2m_release(pcdev->m2m_dev); 1086 video_unregister_device(pcdev->vfd); 1087 v4l2_device_unregister(&pcdev->v4l2_dev); 1088 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); 1089 dma_release_channel(pcdev->dma_chan); 1090 kfree(pcdev); 1091 1092 return 0; 1093 } 1094 1095 static struct platform_driver deinterlace_pdrv = { 1096 .probe = deinterlace_probe, 1097 .remove = deinterlace_remove, 1098 .driver = { 1099 .name = MEM2MEM_NAME, 1100 .owner = THIS_MODULE, 1101 }, 1102 }; 1103 module_platform_driver(deinterlace_pdrv); 1104 1105