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 }; 140 141 struct deinterlace_ctx { 142 struct deinterlace_dev *dev; 143 144 /* Abort requested by m2m */ 145 int aborting; 146 enum v4l2_colorspace colorspace; 147 dma_cookie_t cookie; 148 struct v4l2_m2m_ctx *m2m_ctx; 149 struct dma_interleaved_template *xt; 150 }; 151 152 /* 153 * mem2mem callbacks 154 */ 155 static int deinterlace_job_ready(void *priv) 156 { 157 struct deinterlace_ctx *ctx = priv; 158 struct deinterlace_dev *pcdev = ctx->dev; 159 160 if ((v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) > 0) 161 && (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) > 0) 162 && (atomic_read(&ctx->dev->busy) == 0)) { 163 dprintk(pcdev, "Task ready\n"); 164 return 1; 165 } 166 167 dprintk(pcdev, "Task not ready to run\n"); 168 169 return 0; 170 } 171 172 static void deinterlace_job_abort(void *priv) 173 { 174 struct deinterlace_ctx *ctx = priv; 175 struct deinterlace_dev *pcdev = ctx->dev; 176 177 ctx->aborting = 1; 178 179 dprintk(pcdev, "Aborting task\n"); 180 181 v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx); 182 } 183 184 static void deinterlace_lock(void *priv) 185 { 186 struct deinterlace_ctx *ctx = priv; 187 struct deinterlace_dev *pcdev = ctx->dev; 188 mutex_lock(&pcdev->dev_mutex); 189 } 190 191 static void deinterlace_unlock(void *priv) 192 { 193 struct deinterlace_ctx *ctx = priv; 194 struct deinterlace_dev *pcdev = ctx->dev; 195 mutex_unlock(&pcdev->dev_mutex); 196 } 197 198 static void dma_callback(void *data) 199 { 200 struct deinterlace_ctx *curr_ctx = data; 201 struct deinterlace_dev *pcdev = curr_ctx->dev; 202 struct vb2_v4l2_buffer *src_vb, *dst_vb; 203 204 atomic_set(&pcdev->busy, 0); 205 206 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx); 207 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx); 208 209 dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp; 210 dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK; 211 dst_vb->flags |= 212 src_vb->flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK; 213 dst_vb->timecode = src_vb->timecode; 214 215 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE); 216 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE); 217 218 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx); 219 220 dprintk(pcdev, "dma transfers completed.\n"); 221 } 222 223 static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op, 224 int do_callback) 225 { 226 struct deinterlace_q_data *s_q_data; 227 struct vb2_v4l2_buffer *src_buf, *dst_buf; 228 struct deinterlace_dev *pcdev = ctx->dev; 229 struct dma_chan *chan = pcdev->dma_chan; 230 struct dma_device *dmadev = chan->device; 231 struct dma_async_tx_descriptor *tx; 232 unsigned int s_width, s_height; 233 unsigned int s_size; 234 dma_addr_t p_in, p_out; 235 enum dma_ctrl_flags flags; 236 237 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx); 238 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx); 239 240 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); 241 s_width = s_q_data->width; 242 s_height = s_q_data->height; 243 s_size = s_width * s_height; 244 245 p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(&src_buf->vb2_buf, 0); 246 p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf, 247 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; 348 349 tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags); 350 if (tx == NULL) { 351 v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n"); 352 return; 353 } 354 355 if (do_callback) { 356 tx->callback = dma_callback; 357 tx->callback_param = ctx; 358 } 359 360 ctx->cookie = dmaengine_submit(tx); 361 if (dma_submit_error(ctx->cookie)) { 362 v4l2_warn(&pcdev->v4l2_dev, 363 "DMA submit error %d with src=0x%x dst=0x%x len=0x%x\n", 364 ctx->cookie, (unsigned)p_in, (unsigned)p_out, 365 s_size * 3/2); 366 return; 367 } 368 369 dma_async_issue_pending(chan); 370 } 371 372 static void deinterlace_device_run(void *priv) 373 { 374 struct deinterlace_ctx *ctx = priv; 375 struct deinterlace_q_data *dst_q_data; 376 377 atomic_set(&ctx->dev->busy, 1); 378 379 dprintk(ctx->dev, "%s: DMA try issue.\n", __func__); 380 381 dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE); 382 383 /* 384 * 4 possible field conversions are possible at the moment: 385 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_INTERLACED_TB: 386 * two separate fields in the same input buffer are interlaced 387 * in the output buffer using weaving. Top field comes first. 388 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_NONE: 389 * top field from the input buffer is copied to the output buffer 390 * using line doubling. Bottom field from the input buffer is discarded. 391 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_INTERLACED_BT: 392 * two separate fields in the same input buffer are interlaced 393 * in the output buffer using weaving. Bottom field comes first. 394 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_NONE: 395 * bottom field from the input buffer is copied to the output buffer 396 * using line doubling. Top field from the input buffer is discarded. 397 */ 398 switch (dst_q_data->fmt->fourcc) { 399 case V4L2_PIX_FMT_YUV420: 400 switch (dst_q_data->field) { 401 case V4L2_FIELD_INTERLACED_TB: 402 case V4L2_FIELD_INTERLACED_BT: 403 dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n", 404 __func__); 405 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0); 406 deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0); 407 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0); 408 deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0); 409 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0); 410 deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1); 411 break; 412 case V4L2_FIELD_NONE: 413 default: 414 dprintk(ctx->dev, "%s: yuv420 interlaced line doubling.\n", 415 __func__); 416 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0); 417 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING, 0); 418 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0); 419 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING, 0); 420 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0); 421 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING, 1); 422 break; 423 } 424 break; 425 case V4L2_PIX_FMT_YUYV: 426 default: 427 switch (dst_q_data->field) { 428 case V4L2_FIELD_INTERLACED_TB: 429 case V4L2_FIELD_INTERLACED_BT: 430 dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n", 431 __func__); 432 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0); 433 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1); 434 break; 435 case V4L2_FIELD_NONE: 436 default: 437 dprintk(ctx->dev, "%s: yuyv interlaced line doubling.\n", 438 __func__); 439 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0); 440 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1); 441 break; 442 } 443 break; 444 } 445 446 dprintk(ctx->dev, "%s: DMA issue done.\n", __func__); 447 } 448 449 /* 450 * video ioctls 451 */ 452 static int vidioc_querycap(struct file *file, void *priv, 453 struct v4l2_capability *cap) 454 { 455 strlcpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver)); 456 strlcpy(cap->card, MEM2MEM_NAME, sizeof(cap->card)); 457 strlcpy(cap->bus_info, MEM2MEM_NAME, sizeof(cap->card)); 458 /* 459 * This is only a mem-to-mem video device. The capture and output 460 * device capability flags are left only for backward compatibility 461 * and are scheduled for removal. 462 */ 463 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT | 464 V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING; 465 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 466 467 return 0; 468 } 469 470 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type) 471 { 472 int i, num; 473 struct deinterlace_fmt *fmt; 474 475 num = 0; 476 477 for (i = 0; i < NUM_FORMATS; ++i) { 478 if (formats[i].types & type) { 479 /* index-th format of type type found ? */ 480 if (num == f->index) 481 break; 482 /* Correct type but haven't reached our index yet, 483 * just increment per-type index */ 484 ++num; 485 } 486 } 487 488 if (i < NUM_FORMATS) { 489 /* Format found */ 490 fmt = &formats[i]; 491 strlcpy(f->description, fmt->name, sizeof(f->description)); 492 f->pixelformat = fmt->fourcc; 493 return 0; 494 } 495 496 /* Format not found */ 497 return -EINVAL; 498 } 499 500 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 501 struct v4l2_fmtdesc *f) 502 { 503 return enum_fmt(f, MEM2MEM_CAPTURE); 504 } 505 506 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv, 507 struct v4l2_fmtdesc *f) 508 { 509 return enum_fmt(f, MEM2MEM_OUTPUT); 510 } 511 512 static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f) 513 { 514 struct vb2_queue *vq; 515 struct deinterlace_q_data *q_data; 516 517 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); 518 if (!vq) 519 return -EINVAL; 520 521 q_data = get_q_data(f->type); 522 523 f->fmt.pix.width = q_data->width; 524 f->fmt.pix.height = q_data->height; 525 f->fmt.pix.field = q_data->field; 526 f->fmt.pix.pixelformat = q_data->fmt->fourcc; 527 528 switch (q_data->fmt->fourcc) { 529 case V4L2_PIX_FMT_YUV420: 530 f->fmt.pix.bytesperline = q_data->width * 3 / 2; 531 break; 532 case V4L2_PIX_FMT_YUYV: 533 default: 534 f->fmt.pix.bytesperline = q_data->width * 2; 535 } 536 537 f->fmt.pix.sizeimage = q_data->sizeimage; 538 f->fmt.pix.colorspace = ctx->colorspace; 539 540 return 0; 541 } 542 543 static int vidioc_g_fmt_vid_out(struct file *file, void *priv, 544 struct v4l2_format *f) 545 { 546 return vidioc_g_fmt(priv, f); 547 } 548 549 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 550 struct v4l2_format *f) 551 { 552 return vidioc_g_fmt(priv, f); 553 } 554 555 static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt) 556 { 557 switch (f->fmt.pix.pixelformat) { 558 case V4L2_PIX_FMT_YUV420: 559 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2; 560 break; 561 case V4L2_PIX_FMT_YUYV: 562 default: 563 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 564 } 565 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; 566 567 return 0; 568 } 569 570 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 571 struct v4l2_format *f) 572 { 573 struct deinterlace_fmt *fmt; 574 struct deinterlace_ctx *ctx = priv; 575 576 fmt = find_format(f); 577 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) 578 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420; 579 580 f->fmt.pix.colorspace = ctx->colorspace; 581 582 if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB && 583 f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT && 584 f->fmt.pix.field != V4L2_FIELD_NONE) 585 f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB; 586 587 return vidioc_try_fmt(f, fmt); 588 } 589 590 static int vidioc_try_fmt_vid_out(struct file *file, void *priv, 591 struct v4l2_format *f) 592 { 593 struct deinterlace_fmt *fmt; 594 595 fmt = find_format(f); 596 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) 597 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420; 598 599 if (!f->fmt.pix.colorspace) 600 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709; 601 602 if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB && 603 f->fmt.pix.field != V4L2_FIELD_SEQ_BT) 604 f->fmt.pix.field = V4L2_FIELD_SEQ_TB; 605 606 return vidioc_try_fmt(f, fmt); 607 } 608 609 static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f) 610 { 611 struct deinterlace_q_data *q_data; 612 struct vb2_queue *vq; 613 614 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); 615 if (!vq) 616 return -EINVAL; 617 618 q_data = get_q_data(f->type); 619 if (!q_data) 620 return -EINVAL; 621 622 if (vb2_is_busy(vq)) { 623 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__); 624 return -EBUSY; 625 } 626 627 q_data->fmt = find_format(f); 628 if (!q_data->fmt) { 629 v4l2_err(&ctx->dev->v4l2_dev, 630 "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n", 631 f->type, f->fmt.pix.width, f->fmt.pix.height, 632 f->fmt.pix.pixelformat, f->fmt.pix.field); 633 return -EINVAL; 634 } 635 636 q_data->width = f->fmt.pix.width; 637 q_data->height = f->fmt.pix.height; 638 q_data->field = f->fmt.pix.field; 639 640 switch (f->fmt.pix.pixelformat) { 641 case V4L2_PIX_FMT_YUV420: 642 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2; 643 q_data->sizeimage = (q_data->width * q_data->height * 3) / 2; 644 break; 645 case V4L2_PIX_FMT_YUYV: 646 default: 647 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 648 q_data->sizeimage = q_data->width * q_data->height * 2; 649 } 650 651 dprintk(ctx->dev, 652 "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n", 653 f->type, q_data->width, q_data->height, q_data->fmt->fourcc, 654 q_data->field); 655 656 return 0; 657 } 658 659 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 660 struct v4l2_format *f) 661 { 662 int ret; 663 664 ret = vidioc_try_fmt_vid_cap(file, priv, f); 665 if (ret) 666 return ret; 667 return vidioc_s_fmt(priv, f); 668 } 669 670 static int vidioc_s_fmt_vid_out(struct file *file, void *priv, 671 struct v4l2_format *f) 672 { 673 struct deinterlace_ctx *ctx = priv; 674 int ret; 675 676 ret = vidioc_try_fmt_vid_out(file, priv, f); 677 if (ret) 678 return ret; 679 680 ret = vidioc_s_fmt(priv, f); 681 if (!ret) 682 ctx->colorspace = f->fmt.pix.colorspace; 683 684 return ret; 685 } 686 687 static int vidioc_reqbufs(struct file *file, void *priv, 688 struct v4l2_requestbuffers *reqbufs) 689 { 690 struct deinterlace_ctx *ctx = priv; 691 692 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs); 693 } 694 695 static int vidioc_querybuf(struct file *file, void *priv, 696 struct v4l2_buffer *buf) 697 { 698 struct deinterlace_ctx *ctx = priv; 699 700 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf); 701 } 702 703 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) 704 { 705 struct deinterlace_ctx *ctx = priv; 706 707 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf); 708 } 709 710 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf) 711 { 712 struct deinterlace_ctx *ctx = priv; 713 714 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf); 715 } 716 717 static int vidioc_streamon(struct file *file, void *priv, 718 enum v4l2_buf_type type) 719 { 720 struct deinterlace_q_data *s_q_data, *d_q_data; 721 struct deinterlace_ctx *ctx = priv; 722 723 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); 724 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE); 725 726 /* Check that src and dst queues have the same pix format */ 727 if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) { 728 v4l2_err(&ctx->dev->v4l2_dev, 729 "src and dst formats don't match.\n"); 730 return -EINVAL; 731 } 732 733 /* Check that input and output deinterlacing types are compatible */ 734 switch (s_q_data->field) { 735 case V4L2_FIELD_SEQ_BT: 736 if (d_q_data->field != V4L2_FIELD_NONE && 737 d_q_data->field != V4L2_FIELD_INTERLACED_BT) { 738 v4l2_err(&ctx->dev->v4l2_dev, 739 "src and dst field conversion [(%d)->(%d)] not supported.\n", 740 s_q_data->field, d_q_data->field); 741 return -EINVAL; 742 } 743 break; 744 case V4L2_FIELD_SEQ_TB: 745 if (d_q_data->field != V4L2_FIELD_NONE && 746 d_q_data->field != V4L2_FIELD_INTERLACED_TB) { 747 v4l2_err(&ctx->dev->v4l2_dev, 748 "src and dst field conversion [(%d)->(%d)] not supported.\n", 749 s_q_data->field, d_q_data->field); 750 return -EINVAL; 751 } 752 break; 753 default: 754 return -EINVAL; 755 } 756 757 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type); 758 } 759 760 static int vidioc_streamoff(struct file *file, void *priv, 761 enum v4l2_buf_type type) 762 { 763 struct deinterlace_ctx *ctx = priv; 764 765 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type); 766 } 767 768 static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = { 769 .vidioc_querycap = vidioc_querycap, 770 771 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 772 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 773 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 774 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 775 776 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out, 777 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out, 778 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out, 779 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out, 780 781 .vidioc_reqbufs = vidioc_reqbufs, 782 .vidioc_querybuf = vidioc_querybuf, 783 784 .vidioc_qbuf = vidioc_qbuf, 785 .vidioc_dqbuf = vidioc_dqbuf, 786 787 .vidioc_streamon = vidioc_streamon, 788 .vidioc_streamoff = vidioc_streamoff, 789 }; 790 791 792 /* 793 * Queue operations 794 */ 795 struct vb2_dc_conf { 796 struct device *dev; 797 }; 798 799 static int deinterlace_queue_setup(struct vb2_queue *vq, 800 unsigned int *nbuffers, unsigned int *nplanes, 801 unsigned int sizes[], struct device *alloc_devs[]) 802 { 803 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq); 804 struct deinterlace_q_data *q_data; 805 unsigned int size, count = *nbuffers; 806 807 q_data = get_q_data(vq->type); 808 809 switch (q_data->fmt->fourcc) { 810 case V4L2_PIX_FMT_YUV420: 811 size = q_data->width * q_data->height * 3 / 2; 812 break; 813 case V4L2_PIX_FMT_YUYV: 814 default: 815 size = q_data->width * q_data->height * 2; 816 } 817 818 *nplanes = 1; 819 *nbuffers = count; 820 sizes[0] = size; 821 822 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size); 823 824 return 0; 825 } 826 827 static int deinterlace_buf_prepare(struct vb2_buffer *vb) 828 { 829 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 830 struct deinterlace_q_data *q_data; 831 832 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type); 833 834 q_data = get_q_data(vb->vb2_queue->type); 835 836 if (vb2_plane_size(vb, 0) < q_data->sizeimage) { 837 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n", 838 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage); 839 return -EINVAL; 840 } 841 842 vb2_set_plane_payload(vb, 0, q_data->sizeimage); 843 844 return 0; 845 } 846 847 static void deinterlace_buf_queue(struct vb2_buffer *vb) 848 { 849 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 850 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 851 852 v4l2_m2m_buf_queue(ctx->m2m_ctx, vbuf); 853 } 854 855 static const struct vb2_ops deinterlace_qops = { 856 .queue_setup = deinterlace_queue_setup, 857 .buf_prepare = deinterlace_buf_prepare, 858 .buf_queue = deinterlace_buf_queue, 859 }; 860 861 static int queue_init(void *priv, struct vb2_queue *src_vq, 862 struct vb2_queue *dst_vq) 863 { 864 struct deinterlace_ctx *ctx = priv; 865 int ret; 866 867 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 868 src_vq->io_modes = VB2_MMAP | VB2_USERPTR; 869 src_vq->drv_priv = ctx; 870 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); 871 src_vq->ops = &deinterlace_qops; 872 src_vq->mem_ops = &vb2_dma_contig_memops; 873 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; 874 src_vq->dev = ctx->dev->v4l2_dev.dev; 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 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; 892 dst_vq->dev = ctx->dev->v4l2_dev.dev; 893 q_data[V4L2_M2M_DST].fmt = &formats[0]; 894 q_data[V4L2_M2M_DST].width = 640; 895 q_data[V4L2_M2M_DST].height = 480; 896 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2; 897 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB; 898 899 return vb2_queue_init(dst_vq); 900 } 901 902 /* 903 * File operations 904 */ 905 static int deinterlace_open(struct file *file) 906 { 907 struct deinterlace_dev *pcdev = video_drvdata(file); 908 struct deinterlace_ctx *ctx = NULL; 909 910 ctx = kzalloc(sizeof *ctx, GFP_KERNEL); 911 if (!ctx) 912 return -ENOMEM; 913 914 file->private_data = ctx; 915 ctx->dev = pcdev; 916 917 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init); 918 if (IS_ERR(ctx->m2m_ctx)) { 919 int ret = PTR_ERR(ctx->m2m_ctx); 920 921 kfree(ctx); 922 return ret; 923 } 924 925 ctx->xt = kzalloc(sizeof(struct dma_interleaved_template) + 926 sizeof(struct data_chunk), GFP_KERNEL); 927 if (!ctx->xt) { 928 kfree(ctx); 929 return -ENOMEM; 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 const 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_empty, 988 .vfl_dir = VFL_DIR_M2M, 989 }; 990 991 static const 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 = devm_kzalloc(&pdev->dev, 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 return -ENODEV; 1017 1018 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) { 1019 dev_err(&pdev->dev, "DMA does not support INTERLEAVE\n"); 1020 ret = -ENODEV; 1021 goto rel_dma; 1022 } 1023 1024 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev); 1025 if (ret) 1026 goto rel_dma; 1027 1028 atomic_set(&pcdev->busy, 0); 1029 mutex_init(&pcdev->dev_mutex); 1030 1031 vfd = &pcdev->vfd; 1032 *vfd = deinterlace_videodev; 1033 vfd->lock = &pcdev->dev_mutex; 1034 vfd->v4l2_dev = &pcdev->v4l2_dev; 1035 1036 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0); 1037 if (ret) { 1038 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n"); 1039 goto unreg_dev; 1040 } 1041 1042 video_set_drvdata(vfd, pcdev); 1043 snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name); 1044 v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME 1045 " Device registered as /dev/video%d\n", vfd->num); 1046 1047 platform_set_drvdata(pdev, pcdev); 1048 1049 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops); 1050 if (IS_ERR(pcdev->m2m_dev)) { 1051 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n"); 1052 ret = PTR_ERR(pcdev->m2m_dev); 1053 goto err_m2m; 1054 } 1055 1056 return 0; 1057 1058 err_m2m: 1059 video_unregister_device(&pcdev->vfd); 1060 unreg_dev: 1061 v4l2_device_unregister(&pcdev->v4l2_dev); 1062 rel_dma: 1063 dma_release_channel(pcdev->dma_chan); 1064 1065 return ret; 1066 } 1067 1068 static int deinterlace_remove(struct platform_device *pdev) 1069 { 1070 struct deinterlace_dev *pcdev = platform_get_drvdata(pdev); 1071 1072 v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME); 1073 v4l2_m2m_release(pcdev->m2m_dev); 1074 video_unregister_device(&pcdev->vfd); 1075 v4l2_device_unregister(&pcdev->v4l2_dev); 1076 dma_release_channel(pcdev->dma_chan); 1077 1078 return 0; 1079 } 1080 1081 static struct platform_driver deinterlace_pdrv = { 1082 .probe = deinterlace_probe, 1083 .remove = deinterlace_remove, 1084 .driver = { 1085 .name = MEM2MEM_NAME, 1086 }, 1087 }; 1088 module_platform_driver(deinterlace_pdrv); 1089 1090