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 src_vb->v4l2_buf.timestamp = dst_vb->v4l2_buf.timestamp; 211 src_vb->v4l2_buf.timecode = dst_vb->v4l2_buf.timecode; 212 213 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE); 214 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE); 215 216 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx); 217 218 dprintk(pcdev, "dma transfers completed.\n"); 219 } 220 221 static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op, 222 int do_callback) 223 { 224 struct deinterlace_q_data *s_q_data; 225 struct vb2_buffer *src_buf, *dst_buf; 226 struct deinterlace_dev *pcdev = ctx->dev; 227 struct dma_chan *chan = pcdev->dma_chan; 228 struct dma_device *dmadev = chan->device; 229 struct dma_async_tx_descriptor *tx; 230 unsigned int s_width, s_height; 231 unsigned int s_size; 232 dma_addr_t p_in, p_out; 233 enum dma_ctrl_flags flags; 234 235 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx); 236 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx); 237 238 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); 239 s_width = s_q_data->width; 240 s_height = s_q_data->height; 241 s_size = s_width * s_height; 242 243 p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(src_buf, 0); 244 p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(dst_buf, 0); 245 if (!p_in || !p_out) { 246 v4l2_err(&pcdev->v4l2_dev, 247 "Acquiring kernel pointers to buffers failed\n"); 248 return; 249 } 250 251 switch (op) { 252 case YUV420_DMA_Y_ODD: 253 ctx->xt->numf = s_height / 2; 254 ctx->xt->sgl[0].size = s_width; 255 ctx->xt->sgl[0].icg = s_width; 256 ctx->xt->src_start = p_in; 257 ctx->xt->dst_start = p_out; 258 break; 259 case YUV420_DMA_Y_EVEN: 260 ctx->xt->numf = s_height / 2; 261 ctx->xt->sgl[0].size = s_width; 262 ctx->xt->sgl[0].icg = s_width; 263 ctx->xt->src_start = p_in + s_size / 2; 264 ctx->xt->dst_start = p_out + s_width; 265 break; 266 case YUV420_DMA_U_ODD: 267 ctx->xt->numf = s_height / 4; 268 ctx->xt->sgl[0].size = s_width / 2; 269 ctx->xt->sgl[0].icg = s_width / 2; 270 ctx->xt->src_start = p_in + s_size; 271 ctx->xt->dst_start = p_out + s_size; 272 break; 273 case YUV420_DMA_U_EVEN: 274 ctx->xt->numf = s_height / 4; 275 ctx->xt->sgl[0].size = s_width / 2; 276 ctx->xt->sgl[0].icg = s_width / 2; 277 ctx->xt->src_start = p_in + (9 * s_size) / 8; 278 ctx->xt->dst_start = p_out + s_size + s_width / 2; 279 break; 280 case YUV420_DMA_V_ODD: 281 ctx->xt->numf = s_height / 4; 282 ctx->xt->sgl[0].size = s_width / 2; 283 ctx->xt->sgl[0].icg = s_width / 2; 284 ctx->xt->src_start = p_in + (5 * s_size) / 4; 285 ctx->xt->dst_start = p_out + (5 * s_size) / 4; 286 break; 287 case YUV420_DMA_V_EVEN: 288 ctx->xt->numf = s_height / 4; 289 ctx->xt->sgl[0].size = s_width / 2; 290 ctx->xt->sgl[0].icg = s_width / 2; 291 ctx->xt->src_start = p_in + (11 * s_size) / 8; 292 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2; 293 break; 294 case YUV420_DMA_Y_ODD_DOUBLING: 295 ctx->xt->numf = s_height / 2; 296 ctx->xt->sgl[0].size = s_width; 297 ctx->xt->sgl[0].icg = s_width; 298 ctx->xt->src_start = p_in; 299 ctx->xt->dst_start = p_out + s_width; 300 break; 301 case YUV420_DMA_U_ODD_DOUBLING: 302 ctx->xt->numf = s_height / 4; 303 ctx->xt->sgl[0].size = s_width / 2; 304 ctx->xt->sgl[0].icg = s_width / 2; 305 ctx->xt->src_start = p_in + s_size; 306 ctx->xt->dst_start = p_out + s_size + s_width / 2; 307 break; 308 case YUV420_DMA_V_ODD_DOUBLING: 309 ctx->xt->numf = s_height / 4; 310 ctx->xt->sgl[0].size = s_width / 2; 311 ctx->xt->sgl[0].icg = s_width / 2; 312 ctx->xt->src_start = p_in + (5 * s_size) / 4; 313 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2; 314 break; 315 case YUYV_DMA_ODD: 316 ctx->xt->numf = s_height / 2; 317 ctx->xt->sgl[0].size = s_width * 2; 318 ctx->xt->sgl[0].icg = s_width * 2; 319 ctx->xt->src_start = p_in; 320 ctx->xt->dst_start = p_out; 321 break; 322 case YUYV_DMA_EVEN: 323 ctx->xt->numf = s_height / 2; 324 ctx->xt->sgl[0].size = s_width * 2; 325 ctx->xt->sgl[0].icg = s_width * 2; 326 ctx->xt->src_start = p_in + s_size; 327 ctx->xt->dst_start = p_out + s_width * 2; 328 break; 329 case YUYV_DMA_EVEN_DOUBLING: 330 default: 331 ctx->xt->numf = s_height / 2; 332 ctx->xt->sgl[0].size = s_width * 2; 333 ctx->xt->sgl[0].icg = s_width * 2; 334 ctx->xt->src_start = p_in; 335 ctx->xt->dst_start = p_out + s_width * 2; 336 break; 337 } 338 339 /* Common parameters for al transfers */ 340 ctx->xt->frame_size = 1; 341 ctx->xt->dir = DMA_MEM_TO_MEM; 342 ctx->xt->src_sgl = false; 343 ctx->xt->dst_sgl = true; 344 flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT | 345 DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SKIP_SRC_UNMAP; 346 347 tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags); 348 if (tx == NULL) { 349 v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n"); 350 return; 351 } 352 353 if (do_callback) { 354 tx->callback = dma_callback; 355 tx->callback_param = ctx; 356 } 357 358 ctx->cookie = dmaengine_submit(tx); 359 if (dma_submit_error(ctx->cookie)) { 360 v4l2_warn(&pcdev->v4l2_dev, 361 "DMA submit error %d with src=0x%x dst=0x%x len=0x%x\n", 362 ctx->cookie, (unsigned)p_in, (unsigned)p_out, 363 s_size * 3/2); 364 return; 365 } 366 367 dma_async_issue_pending(chan); 368 } 369 370 static void deinterlace_device_run(void *priv) 371 { 372 struct deinterlace_ctx *ctx = priv; 373 struct deinterlace_q_data *dst_q_data; 374 375 atomic_set(&ctx->dev->busy, 1); 376 377 dprintk(ctx->dev, "%s: DMA try issue.\n", __func__); 378 379 dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE); 380 381 /* 382 * 4 possible field conversions are possible at the moment: 383 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_INTERLACED_TB: 384 * two separate fields in the same input buffer are interlaced 385 * in the output buffer using weaving. Top field comes first. 386 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_NONE: 387 * top field from the input buffer is copied to the output buffer 388 * using line doubling. Bottom field from the input buffer is discarded. 389 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_INTERLACED_BT: 390 * two separate fields in the same input buffer are interlaced 391 * in the output buffer using weaving. Bottom field comes first. 392 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_NONE: 393 * bottom field from the input buffer is copied to the output buffer 394 * using line doubling. Top field from the input buffer is discarded. 395 */ 396 switch (dst_q_data->fmt->fourcc) { 397 case V4L2_PIX_FMT_YUV420: 398 switch (dst_q_data->field) { 399 case V4L2_FIELD_INTERLACED_TB: 400 case V4L2_FIELD_INTERLACED_BT: 401 dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n", 402 __func__); 403 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0); 404 deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0); 405 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0); 406 deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0); 407 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0); 408 deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1); 409 break; 410 case V4L2_FIELD_NONE: 411 default: 412 dprintk(ctx->dev, "%s: yuv420 interlaced line doubling.\n", 413 __func__); 414 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0); 415 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING, 0); 416 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0); 417 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING, 0); 418 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0); 419 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING, 1); 420 break; 421 } 422 break; 423 case V4L2_PIX_FMT_YUYV: 424 default: 425 switch (dst_q_data->field) { 426 case V4L2_FIELD_INTERLACED_TB: 427 case V4L2_FIELD_INTERLACED_BT: 428 dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n", 429 __func__); 430 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0); 431 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1); 432 break; 433 case V4L2_FIELD_NONE: 434 default: 435 dprintk(ctx->dev, "%s: yuyv interlaced line doubling.\n", 436 __func__); 437 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0); 438 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1); 439 break; 440 } 441 break; 442 } 443 444 dprintk(ctx->dev, "%s: DMA issue done.\n", __func__); 445 } 446 447 /* 448 * video ioctls 449 */ 450 static int vidioc_querycap(struct file *file, void *priv, 451 struct v4l2_capability *cap) 452 { 453 strlcpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver)); 454 strlcpy(cap->card, MEM2MEM_NAME, sizeof(cap->card)); 455 strlcpy(cap->bus_info, MEM2MEM_NAME, sizeof(cap->card)); 456 /* 457 * This is only a mem-to-mem video device. The capture and output 458 * device capability flags are left only for backward compatibility 459 * and are scheduled for removal. 460 */ 461 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT | 462 V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING; 463 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 464 465 return 0; 466 } 467 468 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type) 469 { 470 int i, num; 471 struct deinterlace_fmt *fmt; 472 473 num = 0; 474 475 for (i = 0; i < NUM_FORMATS; ++i) { 476 if (formats[i].types & type) { 477 /* index-th format of type type found ? */ 478 if (num == f->index) 479 break; 480 /* Correct type but haven't reached our index yet, 481 * just increment per-type index */ 482 ++num; 483 } 484 } 485 486 if (i < NUM_FORMATS) { 487 /* Format found */ 488 fmt = &formats[i]; 489 strlcpy(f->description, fmt->name, sizeof(f->description)); 490 f->pixelformat = fmt->fourcc; 491 return 0; 492 } 493 494 /* Format not found */ 495 return -EINVAL; 496 } 497 498 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 499 struct v4l2_fmtdesc *f) 500 { 501 return enum_fmt(f, MEM2MEM_CAPTURE); 502 } 503 504 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv, 505 struct v4l2_fmtdesc *f) 506 { 507 return enum_fmt(f, MEM2MEM_OUTPUT); 508 } 509 510 static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f) 511 { 512 struct vb2_queue *vq; 513 struct deinterlace_q_data *q_data; 514 515 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); 516 if (!vq) 517 return -EINVAL; 518 519 q_data = get_q_data(f->type); 520 521 f->fmt.pix.width = q_data->width; 522 f->fmt.pix.height = q_data->height; 523 f->fmt.pix.field = q_data->field; 524 f->fmt.pix.pixelformat = q_data->fmt->fourcc; 525 526 switch (q_data->fmt->fourcc) { 527 case V4L2_PIX_FMT_YUV420: 528 f->fmt.pix.bytesperline = q_data->width * 3 / 2; 529 break; 530 case V4L2_PIX_FMT_YUYV: 531 default: 532 f->fmt.pix.bytesperline = q_data->width * 2; 533 } 534 535 f->fmt.pix.sizeimage = q_data->sizeimage; 536 f->fmt.pix.colorspace = ctx->colorspace; 537 538 return 0; 539 } 540 541 static int vidioc_g_fmt_vid_out(struct file *file, void *priv, 542 struct v4l2_format *f) 543 { 544 return vidioc_g_fmt(priv, f); 545 } 546 547 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 548 struct v4l2_format *f) 549 { 550 return vidioc_g_fmt(priv, f); 551 } 552 553 static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt) 554 { 555 switch (f->fmt.pix.pixelformat) { 556 case V4L2_PIX_FMT_YUV420: 557 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2; 558 break; 559 case V4L2_PIX_FMT_YUYV: 560 default: 561 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 562 } 563 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; 564 565 return 0; 566 } 567 568 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 569 struct v4l2_format *f) 570 { 571 struct deinterlace_fmt *fmt; 572 struct deinterlace_ctx *ctx = priv; 573 574 fmt = find_format(f); 575 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) 576 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420; 577 578 f->fmt.pix.colorspace = ctx->colorspace; 579 580 if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB && 581 f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT && 582 f->fmt.pix.field != V4L2_FIELD_NONE) 583 f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB; 584 585 return vidioc_try_fmt(f, fmt); 586 } 587 588 static int vidioc_try_fmt_vid_out(struct file *file, void *priv, 589 struct v4l2_format *f) 590 { 591 struct deinterlace_fmt *fmt; 592 593 fmt = find_format(f); 594 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) 595 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420; 596 597 if (!f->fmt.pix.colorspace) 598 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709; 599 600 if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB && 601 f->fmt.pix.field != V4L2_FIELD_SEQ_BT) 602 f->fmt.pix.field = V4L2_FIELD_SEQ_TB; 603 604 return vidioc_try_fmt(f, fmt); 605 } 606 607 static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f) 608 { 609 struct deinterlace_q_data *q_data; 610 struct vb2_queue *vq; 611 612 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); 613 if (!vq) 614 return -EINVAL; 615 616 q_data = get_q_data(f->type); 617 if (!q_data) 618 return -EINVAL; 619 620 if (vb2_is_busy(vq)) { 621 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__); 622 return -EBUSY; 623 } 624 625 q_data->fmt = find_format(f); 626 if (!q_data->fmt) { 627 v4l2_err(&ctx->dev->v4l2_dev, 628 "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n", 629 f->type, f->fmt.pix.width, f->fmt.pix.height, 630 f->fmt.pix.pixelformat, f->fmt.pix.field); 631 return -EINVAL; 632 } 633 634 q_data->width = f->fmt.pix.width; 635 q_data->height = f->fmt.pix.height; 636 q_data->field = f->fmt.pix.field; 637 638 switch (f->fmt.pix.pixelformat) { 639 case V4L2_PIX_FMT_YUV420: 640 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2; 641 q_data->sizeimage = (q_data->width * q_data->height * 3) / 2; 642 break; 643 case V4L2_PIX_FMT_YUYV: 644 default: 645 f->fmt.pix.bytesperline = f->fmt.pix.width * 2; 646 q_data->sizeimage = q_data->width * q_data->height * 2; 647 } 648 649 dprintk(ctx->dev, 650 "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n", 651 f->type, q_data->width, q_data->height, q_data->fmt->fourcc, 652 q_data->field); 653 654 return 0; 655 } 656 657 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 658 struct v4l2_format *f) 659 { 660 int ret; 661 662 ret = vidioc_try_fmt_vid_cap(file, priv, f); 663 if (ret) 664 return ret; 665 return vidioc_s_fmt(priv, f); 666 } 667 668 static int vidioc_s_fmt_vid_out(struct file *file, void *priv, 669 struct v4l2_format *f) 670 { 671 struct deinterlace_ctx *ctx = priv; 672 int ret; 673 674 ret = vidioc_try_fmt_vid_out(file, priv, f); 675 if (ret) 676 return ret; 677 678 ret = vidioc_s_fmt(priv, f); 679 if (!ret) 680 ctx->colorspace = f->fmt.pix.colorspace; 681 682 return ret; 683 } 684 685 static int vidioc_reqbufs(struct file *file, void *priv, 686 struct v4l2_requestbuffers *reqbufs) 687 { 688 struct deinterlace_ctx *ctx = priv; 689 690 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs); 691 } 692 693 static int vidioc_querybuf(struct file *file, void *priv, 694 struct v4l2_buffer *buf) 695 { 696 struct deinterlace_ctx *ctx = priv; 697 698 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf); 699 } 700 701 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) 702 { 703 struct deinterlace_ctx *ctx = priv; 704 705 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf); 706 } 707 708 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf) 709 { 710 struct deinterlace_ctx *ctx = priv; 711 712 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf); 713 } 714 715 static int vidioc_streamon(struct file *file, void *priv, 716 enum v4l2_buf_type type) 717 { 718 struct deinterlace_q_data *s_q_data, *d_q_data; 719 struct deinterlace_ctx *ctx = priv; 720 721 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); 722 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE); 723 724 /* Check that src and dst queues have the same pix format */ 725 if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) { 726 v4l2_err(&ctx->dev->v4l2_dev, 727 "src and dst formats don't match.\n"); 728 return -EINVAL; 729 } 730 731 /* Check that input and output deinterlacing types are compatible */ 732 switch (s_q_data->field) { 733 case V4L2_FIELD_SEQ_BT: 734 if (d_q_data->field != V4L2_FIELD_NONE && 735 d_q_data->field != V4L2_FIELD_INTERLACED_BT) { 736 v4l2_err(&ctx->dev->v4l2_dev, 737 "src and dst field conversion [(%d)->(%d)] not supported.\n", 738 s_q_data->field, d_q_data->field); 739 return -EINVAL; 740 } 741 break; 742 case V4L2_FIELD_SEQ_TB: 743 if (d_q_data->field != V4L2_FIELD_NONE && 744 d_q_data->field != V4L2_FIELD_INTERLACED_TB) { 745 v4l2_err(&ctx->dev->v4l2_dev, 746 "src and dst field conversion [(%d)->(%d)] not supported.\n", 747 s_q_data->field, d_q_data->field); 748 return -EINVAL; 749 } 750 break; 751 default: 752 return -EINVAL; 753 } 754 755 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type); 756 } 757 758 static int vidioc_streamoff(struct file *file, void *priv, 759 enum v4l2_buf_type type) 760 { 761 struct deinterlace_ctx *ctx = priv; 762 763 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type); 764 } 765 766 static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = { 767 .vidioc_querycap = vidioc_querycap, 768 769 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 770 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 771 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 772 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 773 774 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out, 775 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out, 776 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out, 777 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out, 778 779 .vidioc_reqbufs = vidioc_reqbufs, 780 .vidioc_querybuf = vidioc_querybuf, 781 782 .vidioc_qbuf = vidioc_qbuf, 783 .vidioc_dqbuf = vidioc_dqbuf, 784 785 .vidioc_streamon = vidioc_streamon, 786 .vidioc_streamoff = vidioc_streamoff, 787 }; 788 789 790 /* 791 * Queue operations 792 */ 793 struct vb2_dc_conf { 794 struct device *dev; 795 }; 796 797 static int deinterlace_queue_setup(struct vb2_queue *vq, 798 const struct v4l2_format *fmt, 799 unsigned int *nbuffers, unsigned int *nplanes, 800 unsigned int sizes[], void *alloc_ctxs[]) 801 { 802 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq); 803 struct deinterlace_q_data *q_data; 804 unsigned int size, count = *nbuffers; 805 806 q_data = get_q_data(vq->type); 807 808 switch (q_data->fmt->fourcc) { 809 case V4L2_PIX_FMT_YUV420: 810 size = q_data->width * q_data->height * 3 / 2; 811 break; 812 case V4L2_PIX_FMT_YUYV: 813 default: 814 size = q_data->width * q_data->height * 2; 815 } 816 817 *nplanes = 1; 818 *nbuffers = count; 819 sizes[0] = size; 820 821 alloc_ctxs[0] = ctx->dev->alloc_ctx; 822 823 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size); 824 825 return 0; 826 } 827 828 static int deinterlace_buf_prepare(struct vb2_buffer *vb) 829 { 830 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 831 struct deinterlace_q_data *q_data; 832 833 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type); 834 835 q_data = get_q_data(vb->vb2_queue->type); 836 837 if (vb2_plane_size(vb, 0) < q_data->sizeimage) { 838 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n", 839 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage); 840 return -EINVAL; 841 } 842 843 vb2_set_plane_payload(vb, 0, q_data->sizeimage); 844 845 return 0; 846 } 847 848 static void deinterlace_buf_queue(struct vb2_buffer *vb) 849 { 850 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 851 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb); 852 } 853 854 static struct vb2_ops deinterlace_qops = { 855 .queue_setup = deinterlace_queue_setup, 856 .buf_prepare = deinterlace_buf_prepare, 857 .buf_queue = deinterlace_buf_queue, 858 }; 859 860 static int queue_init(void *priv, struct vb2_queue *src_vq, 861 struct vb2_queue *dst_vq) 862 { 863 struct deinterlace_ctx *ctx = priv; 864 int ret; 865 866 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 867 src_vq->io_modes = VB2_MMAP | VB2_USERPTR; 868 src_vq->drv_priv = ctx; 869 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); 870 src_vq->ops = &deinterlace_qops; 871 src_vq->mem_ops = &vb2_dma_contig_memops; 872 src_vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY; 873 q_data[V4L2_M2M_SRC].fmt = &formats[0]; 874 q_data[V4L2_M2M_SRC].width = 640; 875 q_data[V4L2_M2M_SRC].height = 480; 876 q_data[V4L2_M2M_SRC].sizeimage = (640 * 480 * 3) / 2; 877 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_SEQ_TB; 878 879 ret = vb2_queue_init(src_vq); 880 if (ret) 881 return ret; 882 883 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 884 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR; 885 dst_vq->drv_priv = ctx; 886 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); 887 dst_vq->ops = &deinterlace_qops; 888 dst_vq->mem_ops = &vb2_dma_contig_memops; 889 dst_vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY; 890 q_data[V4L2_M2M_DST].fmt = &formats[0]; 891 q_data[V4L2_M2M_DST].width = 640; 892 q_data[V4L2_M2M_DST].height = 480; 893 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2; 894 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB; 895 896 return vb2_queue_init(dst_vq); 897 } 898 899 /* 900 * File operations 901 */ 902 static int deinterlace_open(struct file *file) 903 { 904 struct deinterlace_dev *pcdev = video_drvdata(file); 905 struct deinterlace_ctx *ctx = NULL; 906 907 ctx = kzalloc(sizeof *ctx, GFP_KERNEL); 908 if (!ctx) 909 return -ENOMEM; 910 911 file->private_data = ctx; 912 ctx->dev = pcdev; 913 914 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init); 915 if (IS_ERR(ctx->m2m_ctx)) { 916 int ret = PTR_ERR(ctx->m2m_ctx); 917 918 kfree(ctx); 919 return ret; 920 } 921 922 ctx->xt = kzalloc(sizeof(struct dma_async_tx_descriptor) + 923 sizeof(struct data_chunk), GFP_KERNEL); 924 if (!ctx->xt) { 925 kfree(ctx); 926 return -ENOMEM; 927 } 928 929 ctx->colorspace = V4L2_COLORSPACE_REC709; 930 931 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx); 932 933 return 0; 934 } 935 936 static int deinterlace_release(struct file *file) 937 { 938 struct deinterlace_dev *pcdev = video_drvdata(file); 939 struct deinterlace_ctx *ctx = file->private_data; 940 941 dprintk(pcdev, "Releasing instance %p\n", ctx); 942 943 v4l2_m2m_ctx_release(ctx->m2m_ctx); 944 kfree(ctx->xt); 945 kfree(ctx); 946 947 return 0; 948 } 949 950 static unsigned int deinterlace_poll(struct file *file, 951 struct poll_table_struct *wait) 952 { 953 struct deinterlace_ctx *ctx = file->private_data; 954 int ret; 955 956 deinterlace_lock(ctx); 957 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait); 958 deinterlace_unlock(ctx); 959 960 return ret; 961 } 962 963 static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma) 964 { 965 struct deinterlace_ctx *ctx = file->private_data; 966 967 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); 968 } 969 970 static const struct v4l2_file_operations deinterlace_fops = { 971 .owner = THIS_MODULE, 972 .open = deinterlace_open, 973 .release = deinterlace_release, 974 .poll = deinterlace_poll, 975 .unlocked_ioctl = video_ioctl2, 976 .mmap = deinterlace_mmap, 977 }; 978 979 static struct video_device deinterlace_videodev = { 980 .name = MEM2MEM_NAME, 981 .fops = &deinterlace_fops, 982 .ioctl_ops = &deinterlace_ioctl_ops, 983 .minor = -1, 984 .release = video_device_release, 985 .vfl_dir = VFL_DIR_M2M, 986 }; 987 988 static struct v4l2_m2m_ops m2m_ops = { 989 .device_run = deinterlace_device_run, 990 .job_ready = deinterlace_job_ready, 991 .job_abort = deinterlace_job_abort, 992 .lock = deinterlace_lock, 993 .unlock = deinterlace_unlock, 994 }; 995 996 static int deinterlace_probe(struct platform_device *pdev) 997 { 998 struct deinterlace_dev *pcdev; 999 struct video_device *vfd; 1000 dma_cap_mask_t mask; 1001 int ret = 0; 1002 1003 pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL); 1004 if (!pcdev) 1005 return -ENOMEM; 1006 1007 spin_lock_init(&pcdev->irqlock); 1008 1009 dma_cap_zero(mask); 1010 dma_cap_set(DMA_INTERLEAVE, mask); 1011 pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev); 1012 if (!pcdev->dma_chan) 1013 goto free_dev; 1014 1015 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) { 1016 v4l2_err(&pcdev->v4l2_dev, "DMA does not support INTERLEAVE\n"); 1017 goto rel_dma; 1018 } 1019 1020 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev); 1021 if (ret) 1022 goto rel_dma; 1023 1024 atomic_set(&pcdev->busy, 0); 1025 mutex_init(&pcdev->dev_mutex); 1026 1027 vfd = video_device_alloc(); 1028 if (!vfd) { 1029 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n"); 1030 ret = -ENOMEM; 1031 goto unreg_dev; 1032 } 1033 1034 *vfd = deinterlace_videodev; 1035 vfd->lock = &pcdev->dev_mutex; 1036 1037 ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0); 1038 if (ret) { 1039 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n"); 1040 goto rel_vdev; 1041 } 1042 1043 video_set_drvdata(vfd, pcdev); 1044 snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name); 1045 pcdev->vfd = vfd; 1046 v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME 1047 " Device registered as /dev/video%d\n", vfd->num); 1048 1049 platform_set_drvdata(pdev, pcdev); 1050 1051 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); 1052 if (IS_ERR(pcdev->alloc_ctx)) { 1053 v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n"); 1054 ret = PTR_ERR(pcdev->alloc_ctx); 1055 goto err_ctx; 1056 } 1057 1058 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops); 1059 if (IS_ERR(pcdev->m2m_dev)) { 1060 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n"); 1061 ret = PTR_ERR(pcdev->m2m_dev); 1062 goto err_m2m; 1063 } 1064 1065 return 0; 1066 1067 v4l2_m2m_release(pcdev->m2m_dev); 1068 err_m2m: 1069 video_unregister_device(pcdev->vfd); 1070 err_ctx: 1071 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); 1072 rel_vdev: 1073 video_device_release(vfd); 1074 unreg_dev: 1075 v4l2_device_unregister(&pcdev->v4l2_dev); 1076 rel_dma: 1077 dma_release_channel(pcdev->dma_chan); 1078 free_dev: 1079 kfree(pcdev); 1080 1081 return ret; 1082 } 1083 1084 static int deinterlace_remove(struct platform_device *pdev) 1085 { 1086 struct deinterlace_dev *pcdev = 1087 (struct deinterlace_dev *)platform_get_drvdata(pdev); 1088 1089 v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME); 1090 v4l2_m2m_release(pcdev->m2m_dev); 1091 video_unregister_device(pcdev->vfd); 1092 v4l2_device_unregister(&pcdev->v4l2_dev); 1093 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); 1094 dma_release_channel(pcdev->dma_chan); 1095 kfree(pcdev); 1096 1097 return 0; 1098 } 1099 1100 static struct platform_driver deinterlace_pdrv = { 1101 .probe = deinterlace_probe, 1102 .remove = deinterlace_remove, 1103 .driver = { 1104 .name = MEM2MEM_NAME, 1105 .owner = THIS_MODULE, 1106 }, 1107 }; 1108 module_platform_driver(deinterlace_pdrv); 1109 1110