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 26MODULE_DESCRIPTION("mem2mem device which supports deinterlacing using dmaengine"); 27MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com"); 28MODULE_LICENSE("GPL"); 29MODULE_VERSION("0.0.1"); 30 31static bool debug; 32module_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 43struct deinterlace_fmt { 44 char *name; 45 u32 fourcc; 46 /* Types the format can be used for */ 47 u32 types; 48}; 49 50static 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 */ 66struct 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 74enum { 75 V4L2_M2M_SRC = 0, 76 V4L2_M2M_DST = 1, 77}; 78 79enum { 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 */ 95static struct deinterlace_q_data q_data[2]; 96 97static 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 110static 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 128struct 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 142struct 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 */ 156static 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 173static 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 185static 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 192static 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 199static 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 dst_vb->v4l2_buf.timestamp = src_vb->v4l2_buf.timestamp; 211 dst_vb->v4l2_buf.flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK; 212 dst_vb->v4l2_buf.flags |= 213 src_vb->v4l2_buf.flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK; 214 dst_vb->v4l2_buf.timecode = src_vb->v4l2_buf.timecode; 215 216 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE); 217 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE); 218 219 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx); 220 221 dprintk(pcdev, "dma transfers completed.\n"); 222} 223 224static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op, 225 int do_callback) 226{ 227 struct deinterlace_q_data *s_q_data; 228 struct vb2_buffer *src_buf, *dst_buf; 229 struct deinterlace_dev *pcdev = ctx->dev; 230 struct dma_chan *chan = pcdev->dma_chan; 231 struct dma_device *dmadev = chan->device; 232 struct dma_async_tx_descriptor *tx; 233 unsigned int s_width, s_height; 234 unsigned int s_size; 235 dma_addr_t p_in, p_out; 236 enum dma_ctrl_flags flags; 237 238 src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx); 239 dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx); 240 241 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); 242 s_width = s_q_data->width; 243 s_height = s_q_data->height; 244 s_size = s_width * s_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; 348 349 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 372static 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 */ 452static 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 470static 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 500static 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 506static 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 512static 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 543static 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 549static 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 555static 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 570static 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 590static 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 609static 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 659static 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 670static 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 687static 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 695static 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 703static 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 710static 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 717static 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 760static 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 768static 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 */ 795struct vb2_dc_conf { 796 struct device *dev; 797}; 798 799static int deinterlace_queue_setup(struct vb2_queue *vq, 800 const struct v4l2_format *fmt, 801 unsigned int *nbuffers, unsigned int *nplanes, 802 unsigned int sizes[], void *alloc_ctxs[]) 803{ 804 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq); 805 struct deinterlace_q_data *q_data; 806 unsigned int size, count = *nbuffers; 807 808 q_data = get_q_data(vq->type); 809 810 switch (q_data->fmt->fourcc) { 811 case V4L2_PIX_FMT_YUV420: 812 size = q_data->width * q_data->height * 3 / 2; 813 break; 814 case V4L2_PIX_FMT_YUYV: 815 default: 816 size = q_data->width * q_data->height * 2; 817 } 818 819 *nplanes = 1; 820 *nbuffers = count; 821 sizes[0] = size; 822 823 alloc_ctxs[0] = ctx->dev->alloc_ctx; 824 825 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size); 826 827 return 0; 828} 829 830static int deinterlace_buf_prepare(struct vb2_buffer *vb) 831{ 832 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 833 struct deinterlace_q_data *q_data; 834 835 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type); 836 837 q_data = get_q_data(vb->vb2_queue->type); 838 839 if (vb2_plane_size(vb, 0) < q_data->sizeimage) { 840 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n", 841 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage); 842 return -EINVAL; 843 } 844 845 vb2_set_plane_payload(vb, 0, q_data->sizeimage); 846 847 return 0; 848} 849 850static void deinterlace_buf_queue(struct vb2_buffer *vb) 851{ 852 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 853 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb); 854} 855 856static struct vb2_ops deinterlace_qops = { 857 .queue_setup = deinterlace_queue_setup, 858 .buf_prepare = deinterlace_buf_prepare, 859 .buf_queue = deinterlace_buf_queue, 860}; 861 862static int queue_init(void *priv, struct vb2_queue *src_vq, 863 struct vb2_queue *dst_vq) 864{ 865 struct deinterlace_ctx *ctx = priv; 866 int ret; 867 868 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 869 src_vq->io_modes = VB2_MMAP | VB2_USERPTR; 870 src_vq->drv_priv = ctx; 871 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); 872 src_vq->ops = &deinterlace_qops; 873 src_vq->mem_ops = &vb2_dma_contig_memops; 874 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; 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 q_data[V4L2_M2M_DST].fmt = &formats[0]; 893 q_data[V4L2_M2M_DST].width = 640; 894 q_data[V4L2_M2M_DST].height = 480; 895 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2; 896 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB; 897 898 return vb2_queue_init(dst_vq); 899} 900 901/* 902 * File operations 903 */ 904static int deinterlace_open(struct file *file) 905{ 906 struct deinterlace_dev *pcdev = video_drvdata(file); 907 struct deinterlace_ctx *ctx = NULL; 908 909 ctx = kzalloc(sizeof *ctx, GFP_KERNEL); 910 if (!ctx) 911 return -ENOMEM; 912 913 file->private_data = ctx; 914 ctx->dev = pcdev; 915 916 ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init); 917 if (IS_ERR(ctx->m2m_ctx)) { 918 int ret = PTR_ERR(ctx->m2m_ctx); 919 920 kfree(ctx); 921 return ret; 922 } 923 924 ctx->xt = kzalloc(sizeof(struct dma_interleaved_template) + 925 sizeof(struct data_chunk), GFP_KERNEL); 926 if (!ctx->xt) { 927 kfree(ctx); 928 return -ENOMEM; 929 } 930 931 ctx->colorspace = V4L2_COLORSPACE_REC709; 932 933 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx); 934 935 return 0; 936} 937 938static int deinterlace_release(struct file *file) 939{ 940 struct deinterlace_dev *pcdev = video_drvdata(file); 941 struct deinterlace_ctx *ctx = file->private_data; 942 943 dprintk(pcdev, "Releasing instance %p\n", ctx); 944 945 v4l2_m2m_ctx_release(ctx->m2m_ctx); 946 kfree(ctx->xt); 947 kfree(ctx); 948 949 return 0; 950} 951 952static unsigned int deinterlace_poll(struct file *file, 953 struct poll_table_struct *wait) 954{ 955 struct deinterlace_ctx *ctx = file->private_data; 956 int ret; 957 958 deinterlace_lock(ctx); 959 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait); 960 deinterlace_unlock(ctx); 961 962 return ret; 963} 964 965static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma) 966{ 967 struct deinterlace_ctx *ctx = file->private_data; 968 969 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); 970} 971 972static const struct v4l2_file_operations deinterlace_fops = { 973 .owner = THIS_MODULE, 974 .open = deinterlace_open, 975 .release = deinterlace_release, 976 .poll = deinterlace_poll, 977 .unlocked_ioctl = video_ioctl2, 978 .mmap = deinterlace_mmap, 979}; 980 981static struct video_device deinterlace_videodev = { 982 .name = MEM2MEM_NAME, 983 .fops = &deinterlace_fops, 984 .ioctl_ops = &deinterlace_ioctl_ops, 985 .minor = -1, 986 .release = video_device_release, 987 .vfl_dir = VFL_DIR_M2M, 988}; 989 990static struct v4l2_m2m_ops m2m_ops = { 991 .device_run = deinterlace_device_run, 992 .job_ready = deinterlace_job_ready, 993 .job_abort = deinterlace_job_abort, 994 .lock = deinterlace_lock, 995 .unlock = deinterlace_unlock, 996}; 997 998static int deinterlace_probe(struct platform_device *pdev) 999{ 1000 struct deinterlace_dev *pcdev; 1001 struct video_device *vfd; 1002 dma_cap_mask_t mask; 1003 int ret = 0; 1004 1005 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL); 1006 if (!pcdev) 1007 return -ENOMEM; 1008 1009 spin_lock_init(&pcdev->irqlock); 1010 1011 dma_cap_zero(mask); 1012 dma_cap_set(DMA_INTERLEAVE, mask); 1013 pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev); 1014 if (!pcdev->dma_chan) 1015 return -ENODEV; 1016 1017 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) { 1018 v4l2_err(&pcdev->v4l2_dev, "DMA does not support INTERLEAVE\n"); 1019 goto rel_dma; 1020 } 1021 1022 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev); 1023 if (ret) 1024 goto rel_dma; 1025 1026 atomic_set(&pcdev->busy, 0); 1027 mutex_init(&pcdev->dev_mutex); 1028 1029 vfd = video_device_alloc(); 1030 if (!vfd) { 1031 v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n"); 1032 ret = -ENOMEM; 1033 goto unreg_dev; 1034 } 1035 1036 *vfd = deinterlace_videodev; 1037 vfd->lock = &pcdev->dev_mutex; 1038 vfd->v4l2_dev = &pcdev->v4l2_dev; 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); 1071err_m2m: 1072 video_unregister_device(pcdev->vfd); 1073err_ctx: 1074 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); 1075rel_vdev: 1076 video_device_release(vfd); 1077unreg_dev: 1078 v4l2_device_unregister(&pcdev->v4l2_dev); 1079rel_dma: 1080 dma_release_channel(pcdev->dma_chan); 1081 1082 return ret; 1083} 1084 1085static int deinterlace_remove(struct platform_device *pdev) 1086{ 1087 struct deinterlace_dev *pcdev = 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 1096 return 0; 1097} 1098 1099static struct platform_driver deinterlace_pdrv = { 1100 .probe = deinterlace_probe, 1101 .remove = deinterlace_remove, 1102 .driver = { 1103 .name = MEM2MEM_NAME, 1104 .owner = THIS_MODULE, 1105 }, 1106}; 1107module_platform_driver(deinterlace_pdrv); 1108 1109