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 = true; 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, *d_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 d_width, d_height; 229 unsigned int d_size, s_size; 230 dma_addr_t p_in, p_out; 231 enum dma_ctrl_flags flags; 232 233 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx); 234 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx); 235 236 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); 237 s_width = s_q_data->width; 238 s_height = s_q_data->height; 239 s_size = s_width * s_height; 240 241 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE); 242 d_width = d_q_data->width; 243 d_height = d_q_data->height; 244 d_size = d_width * d_height; 245 246 p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(src_buf, 0); 247 p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(dst_buf, 0); 248 if (!p_in || !p_out) { 249 v4l2_err(&pcdev->v4l2_dev, 250 "Acquiring kernel pointers to buffers failed\n"); 251 return; 252 } 253 254 switch (op) { 255 case YUV420_DMA_Y_ODD: 256 ctx->xt->numf = s_height / 2; 257 ctx->xt->sgl[0].size = s_width; 258 ctx->xt->sgl[0].icg = s_width; 259 ctx->xt->src_start = p_in; 260 ctx->xt->dst_start = p_out; 261 break; 262 case YUV420_DMA_Y_EVEN: 263 ctx->xt->numf = s_height / 2; 264 ctx->xt->sgl[0].size = s_width; 265 ctx->xt->sgl[0].icg = s_width; 266 ctx->xt->src_start = p_in + s_size / 2; 267 ctx->xt->dst_start = p_out + s_width; 268 break; 269 case YUV420_DMA_U_ODD: 270 ctx->xt->numf = s_height / 4; 271 ctx->xt->sgl[0].size = s_width / 2; 272 ctx->xt->sgl[0].icg = s_width / 2; 273 ctx->xt->src_start = p_in + s_size; 274 ctx->xt->dst_start = p_out + s_size; 275 break; 276 case YUV420_DMA_U_EVEN: 277 ctx->xt->numf = s_height / 4; 278 ctx->xt->sgl[0].size = s_width / 2; 279 ctx->xt->sgl[0].icg = s_width / 2; 280 ctx->xt->src_start = p_in + (9 * s_size) / 8; 281 ctx->xt->dst_start = p_out + s_size + s_width / 2; 282 break; 283 case YUV420_DMA_V_ODD: 284 ctx->xt->numf = s_height / 4; 285 ctx->xt->sgl[0].size = s_width / 2; 286 ctx->xt->sgl[0].icg = s_width / 2; 287 ctx->xt->src_start = p_in + (5 * s_size) / 4; 288 ctx->xt->dst_start = p_out + (5 * s_size) / 4; 289 break; 290 case YUV420_DMA_V_EVEN: 291 ctx->xt->numf = s_height / 4; 292 ctx->xt->sgl[0].size = s_width / 2; 293 ctx->xt->sgl[0].icg = s_width / 2; 294 ctx->xt->src_start = p_in + (11 * s_size) / 8; 295 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2; 296 break; 297 case YUV420_DMA_Y_ODD_DOUBLING: 298 ctx->xt->numf = s_height / 2; 299 ctx->xt->sgl[0].size = s_width; 300 ctx->xt->sgl[0].icg = s_width; 301 ctx->xt->src_start = p_in; 302 ctx->xt->dst_start = p_out + s_width; 303 break; 304 case YUV420_DMA_U_ODD_DOUBLING: 305 ctx->xt->numf = s_height / 4; 306 ctx->xt->sgl[0].size = s_width / 2; 307 ctx->xt->sgl[0].icg = s_width / 2; 308 ctx->xt->src_start = p_in + s_size; 309 ctx->xt->dst_start = p_out + s_size + s_width / 2; 310 break; 311 case YUV420_DMA_V_ODD_DOUBLING: 312 ctx->xt->numf = s_height / 4; 313 ctx->xt->sgl[0].size = s_width / 2; 314 ctx->xt->sgl[0].icg = s_width / 2; 315 ctx->xt->src_start = p_in + (5 * s_size) / 4; 316 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2; 317 break; 318 case YUYV_DMA_ODD: 319 ctx->xt->numf = s_height / 2; 320 ctx->xt->sgl[0].size = s_width * 2; 321 ctx->xt->sgl[0].icg = s_width * 2; 322 ctx->xt->src_start = p_in; 323 ctx->xt->dst_start = p_out; 324 break; 325 case YUYV_DMA_EVEN: 326 ctx->xt->numf = s_height / 2; 327 ctx->xt->sgl[0].size = s_width * 2; 328 ctx->xt->sgl[0].icg = s_width * 2; 329 ctx->xt->src_start = p_in + s_size; 330 ctx->xt->dst_start = p_out + s_width * 2; 331 break; 332 case YUYV_DMA_EVEN_DOUBLING: 333 default: 334 ctx->xt->numf = s_height / 2; 335 ctx->xt->sgl[0].size = s_width * 2; 336 ctx->xt->sgl[0].icg = s_width * 2; 337 ctx->xt->src_start = p_in; 338 ctx->xt->dst_start = p_out + s_width * 2; 339 break; 340 } 341 342 /* Common parameters for al transfers */ 343 ctx->xt->frame_size = 1; 344 ctx->xt->dir = DMA_MEM_TO_MEM; 345 ctx->xt->src_sgl = false; 346 ctx->xt->dst_sgl = true; 347 flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT | 348 DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SKIP_SRC_UNMAP; 349 350 tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags); 351 if (tx == NULL) { 352 v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n"); 353 return; 354 } 355 356 if (do_callback) { 357 tx->callback = dma_callback; 358 tx->callback_param = ctx; 359 } 360 361 ctx->cookie = dmaengine_submit(tx); 362 if (dma_submit_error(ctx->cookie)) { 363 v4l2_warn(&pcdev->v4l2_dev, 364 "DMA submit error %d with src=0x%x dst=0x%x len=0x%x\n", 365 ctx->cookie, (unsigned)p_in, (unsigned)p_out, 366 s_size * 3/2); 367 return; 368 } 369 370 dma_async_issue_pending(chan); 371 } 372 373 static void deinterlace_device_run(void *priv) 374 { 375 struct deinterlace_ctx *ctx = priv; 376 struct deinterlace_q_data *dst_q_data; 377 378 atomic_set(&ctx->dev->busy, 1); 379 380 dprintk(ctx->dev, "%s: DMA try issue.\n", __func__); 381 382 dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE); 383 384 /* 385 * 4 possible field conversions are possible at the moment: 386 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_INTERLACED_TB: 387 * two separate fields in the same input buffer are interlaced 388 * in the output buffer using weaving. Top field comes first. 389 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_NONE: 390 * top field from the input buffer is copied to the output buffer 391 * using line doubling. Bottom field from the input buffer is discarded. 392 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_INTERLACED_BT: 393 * two separate fields in the same input buffer are interlaced 394 * in the output buffer using weaving. Bottom field comes first. 395 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_NONE: 396 * bottom field from the input buffer is copied to the output buffer 397 * using line doubling. Top field from the input buffer is discarded. 398 */ 399 switch (dst_q_data->fmt->fourcc) { 400 case V4L2_PIX_FMT_YUV420: 401 switch (dst_q_data->field) { 402 case V4L2_FIELD_INTERLACED_TB: 403 case V4L2_FIELD_INTERLACED_BT: 404 dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n", 405 __func__); 406 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0); 407 deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0); 408 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0); 409 deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0); 410 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0); 411 deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1); 412 break; 413 case V4L2_FIELD_NONE: 414 default: 415 dprintk(ctx->dev, "%s: yuv420 interlaced line doubling.\n", 416 __func__); 417 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0); 418 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING, 0); 419 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0); 420 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING, 0); 421 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0); 422 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING, 1); 423 break; 424 } 425 break; 426 case V4L2_PIX_FMT_YUYV: 427 default: 428 switch (dst_q_data->field) { 429 case V4L2_FIELD_INTERLACED_TB: 430 case V4L2_FIELD_INTERLACED_BT: 431 dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n", 432 __func__); 433 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0); 434 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1); 435 break; 436 case V4L2_FIELD_NONE: 437 default: 438 dprintk(ctx->dev, "%s: yuyv interlaced line doubling.\n", 439 __func__); 440 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0); 441 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1); 442 break; 443 } 444 break; 445 } 446 447 dprintk(ctx->dev, "%s: DMA issue done.\n", __func__); 448 } 449 450 /* 451 * video ioctls 452 */ 453 static int vidioc_querycap(struct file *file, void *priv, 454 struct v4l2_capability *cap) 455 { 456 strlcpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver)); 457 strlcpy(cap->card, MEM2MEM_NAME, sizeof(cap->card)); 458 strlcpy(cap->bus_info, MEM2MEM_NAME, sizeof(cap->card)); 459 /* 460 * This is only a mem-to-mem video device. The capture and output 461 * device capability flags are left only for backward compatibility 462 * and are scheduled for removal. 463 */ 464 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT | 465 V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING; 466 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 467 468 return 0; 469 } 470 471 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type) 472 { 473 int i, num; 474 struct deinterlace_fmt *fmt; 475 476 num = 0; 477 478 for (i = 0; i < NUM_FORMATS; ++i) { 479 if (formats[i].types & type) { 480 /* index-th format of type type found ? */ 481 if (num == f->index) 482 break; 483 /* Correct type but haven't reached our index yet, 484 * just increment per-type index */ 485 ++num; 486 } 487 } 488 489 if (i < NUM_FORMATS) { 490 /* Format found */ 491 fmt = &formats[i]; 492 strlcpy(f->description, fmt->name, sizeof(f->description)); 493 f->pixelformat = fmt->fourcc; 494 return 0; 495 } 496 497 /* Format not found */ 498 return -EINVAL; 499 } 500 501 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 502 struct v4l2_fmtdesc *f) 503 { 504 return enum_fmt(f, MEM2MEM_CAPTURE); 505 } 506 507 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv, 508 struct v4l2_fmtdesc *f) 509 { 510 return enum_fmt(f, MEM2MEM_OUTPUT); 511 } 512 513 static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f) 514 { 515 struct vb2_queue *vq; 516 struct deinterlace_q_data *q_data; 517 518 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); 519 if (!vq) 520 return -EINVAL; 521 522 q_data = get_q_data(f->type); 523 524 f->fmt.pix.width = q_data->width; 525 f->fmt.pix.height = q_data->height; 526 f->fmt.pix.field = q_data->field; 527 f->fmt.pix.pixelformat = q_data->fmt->fourcc; 528 529 switch (q_data->fmt->fourcc) { 530 case V4L2_PIX_FMT_YUV420: 531 f->fmt.pix.bytesperline = q_data->width * 3 / 2; 532 break; 533 case V4L2_PIX_FMT_YUYV: 534 default: 535 f->fmt.pix.bytesperline = q_data->width * 2; 536 } 537 538 f->fmt.pix.sizeimage = q_data->sizeimage; 539 f->fmt.pix.colorspace = ctx->colorspace; 540 541 return 0; 542 } 543 544 static int vidioc_g_fmt_vid_out(struct file *file, void *priv, 545 struct v4l2_format *f) 546 { 547 return vidioc_g_fmt(priv, f); 548 } 549 550 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 551 struct v4l2_format *f) 552 { 553 return vidioc_g_fmt(priv, f); 554 } 555 556 static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt) 557 { 558 switch (f->fmt.pix.pixelformat) { 559 case V4L2_PIX_FMT_YUV420: 560 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2; 561 break; 562 case V4L2_PIX_FMT_YUYV: 563 default: 564 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 565 } 566 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; 567 568 return 0; 569 } 570 571 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 572 struct v4l2_format *f) 573 { 574 struct deinterlace_fmt *fmt; 575 struct deinterlace_ctx *ctx = priv; 576 577 fmt = find_format(f); 578 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) 579 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420; 580 581 f->fmt.pix.colorspace = ctx->colorspace; 582 583 if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB && 584 f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT && 585 f->fmt.pix.field != V4L2_FIELD_NONE) 586 f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB; 587 588 return vidioc_try_fmt(f, fmt); 589 } 590 591 static int vidioc_try_fmt_vid_out(struct file *file, void *priv, 592 struct v4l2_format *f) 593 { 594 struct deinterlace_fmt *fmt; 595 596 fmt = find_format(f); 597 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) 598 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420; 599 600 if (!f->fmt.pix.colorspace) 601 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709; 602 603 if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB && 604 f->fmt.pix.field != V4L2_FIELD_SEQ_BT) 605 f->fmt.pix.field = V4L2_FIELD_SEQ_TB; 606 607 return vidioc_try_fmt(f, fmt); 608 } 609 610 static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f) 611 { 612 struct deinterlace_q_data *q_data; 613 struct vb2_queue *vq; 614 615 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); 616 if (!vq) 617 return -EINVAL; 618 619 q_data = get_q_data(f->type); 620 if (!q_data) 621 return -EINVAL; 622 623 if (vb2_is_busy(vq)) { 624 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__); 625 return -EBUSY; 626 } 627 628 q_data->fmt = find_format(f); 629 if (!q_data->fmt) { 630 v4l2_err(&ctx->dev->v4l2_dev, 631 "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n", 632 f->type, f->fmt.pix.width, f->fmt.pix.height, 633 f->fmt.pix.pixelformat, f->fmt.pix.field); 634 return -EINVAL; 635 } 636 637 q_data->width = f->fmt.pix.width; 638 q_data->height = f->fmt.pix.height; 639 q_data->field = f->fmt.pix.field; 640 641 switch (f->fmt.pix.pixelformat) { 642 case V4L2_PIX_FMT_YUV420: 643 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2; 644 q_data->sizeimage = (q_data->width * q_data->height * 3) / 2; 645 break; 646 case V4L2_PIX_FMT_YUYV: 647 default: 648 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 649 q_data->sizeimage = q_data->width * q_data->height * 2; 650 } 651 652 dprintk(ctx->dev, 653 "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n", 654 f->type, q_data->width, q_data->height, q_data->fmt->fourcc, 655 q_data->field); 656 657 return 0; 658 } 659 660 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 661 struct v4l2_format *f) 662 { 663 int ret; 664 665 ret = vidioc_try_fmt_vid_cap(file, priv, f); 666 if (ret) 667 return ret; 668 return vidioc_s_fmt(priv, f); 669 } 670 671 static int vidioc_s_fmt_vid_out(struct file *file, void *priv, 672 struct v4l2_format *f) 673 { 674 struct deinterlace_ctx *ctx = priv; 675 int ret; 676 677 ret = vidioc_try_fmt_vid_out(file, priv, f); 678 if (ret) 679 return ret; 680 681 ret = vidioc_s_fmt(priv, f); 682 if (!ret) 683 ctx->colorspace = f->fmt.pix.colorspace; 684 685 return ret; 686 } 687 688 static int vidioc_reqbufs(struct file *file, void *priv, 689 struct v4l2_requestbuffers *reqbufs) 690 { 691 struct deinterlace_ctx *ctx = priv; 692 693 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs); 694 } 695 696 static int vidioc_querybuf(struct file *file, void *priv, 697 struct v4l2_buffer *buf) 698 { 699 struct deinterlace_ctx *ctx = priv; 700 701 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf); 702 } 703 704 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) 705 { 706 struct deinterlace_ctx *ctx = priv; 707 708 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf); 709 } 710 711 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf) 712 { 713 struct deinterlace_ctx *ctx = priv; 714 715 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf); 716 } 717 718 static int vidioc_streamon(struct file *file, void *priv, 719 enum v4l2_buf_type type) 720 { 721 struct deinterlace_q_data *s_q_data, *d_q_data; 722 struct deinterlace_ctx *ctx = priv; 723 724 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); 725 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE); 726 727 /* Check that src and dst queues have the same pix format */ 728 if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) { 729 v4l2_err(&ctx->dev->v4l2_dev, 730 "src and dst formats don't match.\n"); 731 return -EINVAL; 732 } 733 734 /* Check that input and output deinterlacing types are compatible */ 735 switch (s_q_data->field) { 736 case V4L2_FIELD_SEQ_BT: 737 if (d_q_data->field != V4L2_FIELD_NONE && 738 d_q_data->field != V4L2_FIELD_INTERLACED_BT) { 739 v4l2_err(&ctx->dev->v4l2_dev, 740 "src and dst field conversion [(%d)->(%d)] not supported.\n", 741 s_q_data->field, d_q_data->field); 742 return -EINVAL; 743 } 744 break; 745 case V4L2_FIELD_SEQ_TB: 746 if (d_q_data->field != V4L2_FIELD_NONE && 747 d_q_data->field != V4L2_FIELD_INTERLACED_TB) { 748 v4l2_err(&ctx->dev->v4l2_dev, 749 "src and dst field conversion [(%d)->(%d)] not supported.\n", 750 s_q_data->field, d_q_data->field); 751 return -EINVAL; 752 } 753 break; 754 default: 755 return -EINVAL; 756 } 757 758 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type); 759 } 760 761 static int vidioc_streamoff(struct file *file, void *priv, 762 enum v4l2_buf_type type) 763 { 764 struct deinterlace_ctx *ctx = priv; 765 766 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type); 767 } 768 769 static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = { 770 .vidioc_querycap = vidioc_querycap, 771 772 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 773 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 774 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 775 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 776 777 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out, 778 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out, 779 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out, 780 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out, 781 782 .vidioc_reqbufs = vidioc_reqbufs, 783 .vidioc_querybuf = vidioc_querybuf, 784 785 .vidioc_qbuf = vidioc_qbuf, 786 .vidioc_dqbuf = vidioc_dqbuf, 787 788 .vidioc_streamon = vidioc_streamon, 789 .vidioc_streamoff = vidioc_streamoff, 790 }; 791 792 793 /* 794 * Queue operations 795 */ 796 struct vb2_dc_conf { 797 struct device *dev; 798 }; 799 800 static int deinterlace_queue_setup(struct vb2_queue *vq, 801 const struct v4l2_format *fmt, 802 unsigned int *nbuffers, unsigned int *nplanes, 803 unsigned int sizes[], void *alloc_ctxs[]) 804 { 805 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq); 806 struct deinterlace_q_data *q_data; 807 unsigned int size, count = *nbuffers; 808 809 q_data = get_q_data(vq->type); 810 811 switch (q_data->fmt->fourcc) { 812 case V4L2_PIX_FMT_YUV420: 813 size = q_data->width * q_data->height * 3 / 2; 814 break; 815 case V4L2_PIX_FMT_YUYV: 816 default: 817 size = q_data->width * q_data->height * 2; 818 } 819 820 *nplanes = 1; 821 *nbuffers = count; 822 sizes[0] = size; 823 824 alloc_ctxs[0] = ctx->dev->alloc_ctx; 825 826 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size); 827 828 return 0; 829 } 830 831 static int deinterlace_buf_prepare(struct vb2_buffer *vb) 832 { 833 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 834 struct deinterlace_q_data *q_data; 835 836 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type); 837 838 q_data = get_q_data(vb->vb2_queue->type); 839 840 if (vb2_plane_size(vb, 0) < q_data->sizeimage) { 841 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n", 842 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage); 843 return -EINVAL; 844 } 845 846 vb2_set_plane_payload(vb, 0, q_data->sizeimage); 847 848 return 0; 849 } 850 851 static void deinterlace_buf_queue(struct vb2_buffer *vb) 852 { 853 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 854 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb); 855 } 856 857 static struct vb2_ops deinterlace_qops = { 858 .queue_setup = deinterlace_queue_setup, 859 .buf_prepare = deinterlace_buf_prepare, 860 .buf_queue = deinterlace_buf_queue, 861 }; 862 863 static int queue_init(void *priv, struct vb2_queue *src_vq, 864 struct vb2_queue *dst_vq) 865 { 866 struct deinterlace_ctx *ctx = priv; 867 int ret; 868 869 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 870 src_vq->io_modes = VB2_MMAP | VB2_USERPTR; 871 src_vq->drv_priv = ctx; 872 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); 873 src_vq->ops = &deinterlace_qops; 874 src_vq->mem_ops = &vb2_dma_contig_memops; 875 q_data[V4L2_M2M_SRC].fmt = &formats[0]; 876 q_data[V4L2_M2M_SRC].width = 640; 877 q_data[V4L2_M2M_SRC].height = 480; 878 q_data[V4L2_M2M_SRC].sizeimage = (640 * 480 * 3) / 2; 879 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_SEQ_TB; 880 881 ret = vb2_queue_init(src_vq); 882 if (ret) 883 return ret; 884 885 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 886 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR; 887 dst_vq->drv_priv = ctx; 888 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); 889 dst_vq->ops = &deinterlace_qops; 890 dst_vq->mem_ops = &vb2_dma_contig_memops; 891 q_data[V4L2_M2M_DST].fmt = &formats[0]; 892 q_data[V4L2_M2M_DST].width = 640; 893 q_data[V4L2_M2M_DST].height = 480; 894 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2; 895 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB; 896 897 return vb2_queue_init(dst_vq); 898 } 899 900 /* 901 * File operations 902 */ 903 static int deinterlace_open(struct file *file) 904 { 905 struct deinterlace_dev *pcdev = video_drvdata(file); 906 struct deinterlace_ctx *ctx = NULL; 907 908 ctx = kzalloc(sizeof *ctx, GFP_KERNEL); 909 if (!ctx) 910 return -ENOMEM; 911 912 file->private_data = ctx; 913 ctx->dev = pcdev; 914 915 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init); 916 if (IS_ERR(ctx->m2m_ctx)) { 917 int ret = PTR_ERR(ctx->m2m_ctx); 918 919 kfree(ctx); 920 return ret; 921 } 922 923 ctx->xt = kzalloc(sizeof(struct dma_async_tx_descriptor) + 924 sizeof(struct data_chunk), GFP_KERNEL); 925 if (!ctx->xt) { 926 int ret = PTR_ERR(ctx->xt); 927 928 kfree(ctx); 929 return ret; 930 } 931 932 ctx->colorspace = V4L2_COLORSPACE_REC709; 933 934 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx); 935 936 return 0; 937 } 938 939 static int deinterlace_release(struct file *file) 940 { 941 struct deinterlace_dev *pcdev = video_drvdata(file); 942 struct deinterlace_ctx *ctx = file->private_data; 943 944 dprintk(pcdev, "Releasing instance %p\n", ctx); 945 946 v4l2_m2m_ctx_release(ctx->m2m_ctx); 947 kfree(ctx->xt); 948 kfree(ctx); 949 950 return 0; 951 } 952 953 static unsigned int deinterlace_poll(struct file *file, 954 struct poll_table_struct *wait) 955 { 956 struct deinterlace_ctx *ctx = file->private_data; 957 int ret; 958 959 deinterlace_lock(ctx); 960 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait); 961 deinterlace_unlock(ctx); 962 963 return ret; 964 } 965 966 static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma) 967 { 968 struct deinterlace_ctx *ctx = file->private_data; 969 970 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); 971 } 972 973 static const struct v4l2_file_operations deinterlace_fops = { 974 .owner = THIS_MODULE, 975 .open = deinterlace_open, 976 .release = deinterlace_release, 977 .poll = deinterlace_poll, 978 .unlocked_ioctl = video_ioctl2, 979 .mmap = deinterlace_mmap, 980 }; 981 982 static struct video_device deinterlace_videodev = { 983 .name = MEM2MEM_NAME, 984 .fops = &deinterlace_fops, 985 .ioctl_ops = &deinterlace_ioctl_ops, 986 .minor = -1, 987 .release = video_device_release, 988 .vfl_dir = VFL_DIR_M2M, 989 }; 990 991 static struct v4l2_m2m_ops m2m_ops = { 992 .device_run = deinterlace_device_run, 993 .job_ready = deinterlace_job_ready, 994 .job_abort = deinterlace_job_abort, 995 .lock = deinterlace_lock, 996 .unlock = deinterlace_unlock, 997 }; 998 999 static int deinterlace_probe(struct platform_device *pdev) 1000 { 1001 struct deinterlace_dev *pcdev; 1002 struct video_device *vfd; 1003 dma_cap_mask_t mask; 1004 int ret = 0; 1005 1006 pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL); 1007 if (!pcdev) 1008 return -ENOMEM; 1009 1010 spin_lock_init(&pcdev->irqlock); 1011 1012 dma_cap_zero(mask); 1013 dma_cap_set(DMA_INTERLEAVE, mask); 1014 pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev); 1015 if (!pcdev->dma_chan) 1016 goto free_dev; 1017 1018 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) { 1019 v4l2_err(&pcdev->v4l2_dev, "DMA does not support INTERLEAVE\n"); 1020 goto rel_dma; 1021 } 1022 1023 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev); 1024 if (ret) 1025 goto rel_dma; 1026 1027 atomic_set(&pcdev->busy, 0); 1028 mutex_init(&pcdev->dev_mutex); 1029 1030 vfd = video_device_alloc(); 1031 if (!vfd) { 1032 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n"); 1033 ret = -ENOMEM; 1034 goto unreg_dev; 1035 } 1036 1037 *vfd = deinterlace_videodev; 1038 vfd->lock = &pcdev->dev_mutex; 1039 1040 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0); 1041 if (ret) { 1042 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n"); 1043 goto rel_vdev; 1044 } 1045 1046 video_set_drvdata(vfd, pcdev); 1047 snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name); 1048 pcdev->vfd = vfd; 1049 v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME 1050 " Device registered as /dev/video%d\n", vfd->num); 1051 1052 platform_set_drvdata(pdev, pcdev); 1053 1054 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); 1055 if (IS_ERR(pcdev->alloc_ctx)) { 1056 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n"); 1057 ret = PTR_ERR(pcdev->alloc_ctx); 1058 goto err_ctx; 1059 } 1060 1061 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops); 1062 if (IS_ERR(pcdev->m2m_dev)) { 1063 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n"); 1064 ret = PTR_ERR(pcdev->m2m_dev); 1065 goto err_m2m; 1066 } 1067 1068 return 0; 1069 1070 v4l2_m2m_release(pcdev->m2m_dev); 1071 err_m2m: 1072 video_unregister_device(pcdev->vfd); 1073 err_ctx: 1074 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); 1075 rel_vdev: 1076 video_device_release(vfd); 1077 unreg_dev: 1078 v4l2_device_unregister(&pcdev->v4l2_dev); 1079 rel_dma: 1080 dma_release_channel(pcdev->dma_chan); 1081 free_dev: 1082 kfree(pcdev); 1083 1084 return ret; 1085 } 1086 1087 static int deinterlace_remove(struct platform_device *pdev) 1088 { 1089 struct deinterlace_dev *pcdev = 1090 (struct deinterlace_dev *)platform_get_drvdata(pdev); 1091 1092 v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME); 1093 v4l2_m2m_release(pcdev->m2m_dev); 1094 video_unregister_device(pcdev->vfd); 1095 v4l2_device_unregister(&pcdev->v4l2_dev); 1096 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); 1097 dma_release_channel(pcdev->dma_chan); 1098 kfree(pcdev); 1099 1100 return 0; 1101 } 1102 1103 static struct platform_driver deinterlace_pdrv = { 1104 .probe = deinterlace_probe, 1105 .remove = deinterlace_remove, 1106 .driver = { 1107 .name = MEM2MEM_NAME, 1108 .owner = THIS_MODULE, 1109 }, 1110 }; 1111 1112 static void __exit deinterlace_exit(void) 1113 { 1114 platform_driver_unregister(&deinterlace_pdrv); 1115 } 1116 1117 static int __init deinterlace_init(void) 1118 { 1119 return platform_driver_register(&deinterlace_pdrv); 1120 } 1121 1122 module_init(deinterlace_init); 1123 module_exit(deinterlace_exit); 1124 1125