1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * A virtual v4l2-mem2mem example device. 4 * 5 * This is a virtual device driver for testing mem-to-mem videobuf framework. 6 * It simulates a device that uses memory buffers for both source and 7 * destination, processes the data and issues an "irq" (simulated by a delayed 8 * workqueue). 9 * The device is capable of multi-instance, multi-buffer-per-transaction 10 * operation (via the mem2mem framework). 11 * 12 * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd. 13 * Pawel Osciak, <pawel@osciak.com> 14 * Marek Szyprowski, <m.szyprowski@samsung.com> 15 * 16 * This program is free software; you can redistribute it and/or modify 17 * it under the terms of the GNU General Public License as published by the 18 * Free Software Foundation; either version 2 of the 19 * License, or (at your option) any later version 20 */ 21 #include <linux/module.h> 22 #include <linux/delay.h> 23 #include <linux/fs.h> 24 #include <linux/sched.h> 25 #include <linux/slab.h> 26 27 #include <linux/platform_device.h> 28 #include <media/v4l2-mem2mem.h> 29 #include <media/v4l2-device.h> 30 #include <media/v4l2-ioctl.h> 31 #include <media/v4l2-ctrls.h> 32 #include <media/v4l2-event.h> 33 #include <media/videobuf2-vmalloc.h> 34 35 MODULE_DESCRIPTION("Virtual device for mem2mem framework testing"); 36 MODULE_AUTHOR("Pawel Osciak, <pawel@osciak.com>"); 37 MODULE_LICENSE("GPL"); 38 MODULE_VERSION("0.2"); 39 MODULE_ALIAS("mem2mem_testdev"); 40 41 static unsigned int debug; 42 module_param(debug, uint, 0644); 43 MODULE_PARM_DESC(debug, "debug level"); 44 45 /* Default transaction time in msec */ 46 static unsigned int default_transtime = 40; /* Max 25 fps */ 47 module_param(default_transtime, uint, 0644); 48 MODULE_PARM_DESC(default_transtime, "default transaction time in ms"); 49 50 #define MIN_W 32 51 #define MIN_H 32 52 #define MAX_W 640 53 #define MAX_H 480 54 55 /* Pixel alignment for non-bayer formats */ 56 #define WIDTH_ALIGN 2 57 #define HEIGHT_ALIGN 1 58 59 /* Pixel alignment for bayer formats */ 60 #define BAYER_WIDTH_ALIGN 2 61 #define BAYER_HEIGHT_ALIGN 2 62 63 /* Flags that indicate a format can be used for capture/output */ 64 #define MEM2MEM_CAPTURE BIT(0) 65 #define MEM2MEM_OUTPUT BIT(1) 66 67 #define MEM2MEM_NAME "vim2m" 68 69 /* Per queue */ 70 #define MEM2MEM_DEF_NUM_BUFS VIDEO_MAX_FRAME 71 /* In bytes, per queue */ 72 #define MEM2MEM_VID_MEM_LIMIT (16 * 1024 * 1024) 73 74 /* Flags that indicate processing mode */ 75 #define MEM2MEM_HFLIP BIT(0) 76 #define MEM2MEM_VFLIP BIT(1) 77 78 #define dprintk(dev, lvl, fmt, arg...) \ 79 v4l2_dbg(lvl, debug, &(dev)->v4l2_dev, "%s: " fmt, __func__, ## arg) 80 81 static void vim2m_dev_release(struct device *dev) 82 {} 83 84 static struct platform_device vim2m_pdev = { 85 .name = MEM2MEM_NAME, 86 .dev.release = vim2m_dev_release, 87 }; 88 89 struct vim2m_fmt { 90 u32 fourcc; 91 int depth; 92 /* Types the format can be used for */ 93 u32 types; 94 }; 95 96 static struct vim2m_fmt formats[] = { 97 { 98 .fourcc = V4L2_PIX_FMT_RGB565, /* rrrrrggg gggbbbbb */ 99 .depth = 16, 100 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT, 101 }, { 102 .fourcc = V4L2_PIX_FMT_RGB565X, /* gggbbbbb rrrrrggg */ 103 .depth = 16, 104 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT, 105 }, { 106 .fourcc = V4L2_PIX_FMT_RGB24, 107 .depth = 24, 108 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT, 109 }, { 110 .fourcc = V4L2_PIX_FMT_BGR24, 111 .depth = 24, 112 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT, 113 }, { 114 .fourcc = V4L2_PIX_FMT_YUYV, 115 .depth = 16, 116 .types = MEM2MEM_CAPTURE, 117 }, { 118 .fourcc = V4L2_PIX_FMT_SBGGR8, 119 .depth = 8, 120 .types = MEM2MEM_CAPTURE, 121 }, { 122 .fourcc = V4L2_PIX_FMT_SGBRG8, 123 .depth = 8, 124 .types = MEM2MEM_CAPTURE, 125 }, { 126 .fourcc = V4L2_PIX_FMT_SGRBG8, 127 .depth = 8, 128 .types = MEM2MEM_CAPTURE, 129 }, { 130 .fourcc = V4L2_PIX_FMT_SRGGB8, 131 .depth = 8, 132 .types = MEM2MEM_CAPTURE, 133 }, 134 }; 135 136 #define NUM_FORMATS ARRAY_SIZE(formats) 137 138 /* Per-queue, driver-specific private data */ 139 struct vim2m_q_data { 140 unsigned int width; 141 unsigned int height; 142 unsigned int sizeimage; 143 unsigned int sequence; 144 struct vim2m_fmt *fmt; 145 }; 146 147 enum { 148 V4L2_M2M_SRC = 0, 149 V4L2_M2M_DST = 1, 150 }; 151 152 #define V4L2_CID_TRANS_TIME_MSEC (V4L2_CID_USER_BASE + 0x1000) 153 #define V4L2_CID_TRANS_NUM_BUFS (V4L2_CID_USER_BASE + 0x1001) 154 155 static struct vim2m_fmt *find_format(u32 fourcc) 156 { 157 struct vim2m_fmt *fmt; 158 unsigned int k; 159 160 for (k = 0; k < NUM_FORMATS; k++) { 161 fmt = &formats[k]; 162 if (fmt->fourcc == fourcc) 163 break; 164 } 165 166 if (k == NUM_FORMATS) 167 return NULL; 168 169 return &formats[k]; 170 } 171 172 static void get_alignment(u32 fourcc, 173 unsigned int *walign, unsigned int *halign) 174 { 175 switch (fourcc) { 176 case V4L2_PIX_FMT_SBGGR8: 177 case V4L2_PIX_FMT_SGBRG8: 178 case V4L2_PIX_FMT_SGRBG8: 179 case V4L2_PIX_FMT_SRGGB8: 180 *walign = BAYER_WIDTH_ALIGN; 181 *halign = BAYER_HEIGHT_ALIGN; 182 return; 183 default: 184 *walign = WIDTH_ALIGN; 185 *halign = HEIGHT_ALIGN; 186 return; 187 } 188 } 189 190 struct vim2m_dev { 191 struct v4l2_device v4l2_dev; 192 struct video_device vfd; 193 #ifdef CONFIG_MEDIA_CONTROLLER 194 struct media_device mdev; 195 #endif 196 197 atomic_t num_inst; 198 struct mutex dev_mutex; 199 200 struct v4l2_m2m_dev *m2m_dev; 201 }; 202 203 struct vim2m_ctx { 204 struct v4l2_fh fh; 205 struct vim2m_dev *dev; 206 207 struct v4l2_ctrl_handler hdl; 208 209 /* Processed buffers in this transaction */ 210 u8 num_processed; 211 212 /* Transaction length (i.e. how many buffers per transaction) */ 213 u32 translen; 214 /* Transaction time (i.e. simulated processing time) in milliseconds */ 215 u32 transtime; 216 217 struct mutex vb_mutex; 218 struct delayed_work work_run; 219 220 /* Abort requested by m2m */ 221 int aborting; 222 223 /* Processing mode */ 224 int mode; 225 226 enum v4l2_colorspace colorspace; 227 enum v4l2_ycbcr_encoding ycbcr_enc; 228 enum v4l2_xfer_func xfer_func; 229 enum v4l2_quantization quant; 230 231 /* Source and destination queue data */ 232 struct vim2m_q_data q_data[2]; 233 }; 234 235 static inline struct vim2m_ctx *file2ctx(struct file *file) 236 { 237 return container_of(file->private_data, struct vim2m_ctx, fh); 238 } 239 240 static struct vim2m_q_data *get_q_data(struct vim2m_ctx *ctx, 241 enum v4l2_buf_type type) 242 { 243 switch (type) { 244 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 245 return &ctx->q_data[V4L2_M2M_SRC]; 246 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 247 return &ctx->q_data[V4L2_M2M_DST]; 248 default: 249 return NULL; 250 } 251 } 252 253 static const char *type_name(enum v4l2_buf_type type) 254 { 255 switch (type) { 256 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 257 return "Output"; 258 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 259 return "Capture"; 260 default: 261 return "Invalid"; 262 } 263 } 264 265 #define CLIP(__color) \ 266 (u8)(((__color) > 0xff) ? 0xff : (((__color) < 0) ? 0 : (__color))) 267 268 static void copy_line(struct vim2m_q_data *q_data_out, 269 u8 *src, u8 *dst, bool reverse) 270 { 271 int x, depth = q_data_out->fmt->depth >> 3; 272 273 if (!reverse) { 274 memcpy(dst, src, q_data_out->width * depth); 275 } else { 276 for (x = 0; x < q_data_out->width >> 1; x++) { 277 memcpy(dst, src, depth); 278 memcpy(dst + depth, src - depth, depth); 279 src -= depth << 1; 280 dst += depth << 1; 281 } 282 return; 283 } 284 } 285 286 static void copy_two_pixels(struct vim2m_q_data *q_data_in, 287 struct vim2m_q_data *q_data_out, 288 u8 *src[2], u8 **dst, int ypos, bool reverse) 289 { 290 struct vim2m_fmt *out = q_data_out->fmt; 291 struct vim2m_fmt *in = q_data_in->fmt; 292 u8 _r[2], _g[2], _b[2], *r, *g, *b; 293 int i; 294 295 /* Step 1: read two consecutive pixels from src pointer */ 296 297 r = _r; 298 g = _g; 299 b = _b; 300 301 switch (in->fourcc) { 302 case V4L2_PIX_FMT_RGB565: /* rrrrrggg gggbbbbb */ 303 for (i = 0; i < 2; i++) { 304 u16 pix = le16_to_cpu(*(__le16 *)(src[i])); 305 306 *r++ = (u8)(((pix & 0xf800) >> 11) << 3) | 0x07; 307 *g++ = (u8)((((pix & 0x07e0) >> 5)) << 2) | 0x03; 308 *b++ = (u8)((pix & 0x1f) << 3) | 0x07; 309 } 310 break; 311 case V4L2_PIX_FMT_RGB565X: /* gggbbbbb rrrrrggg */ 312 for (i = 0; i < 2; i++) { 313 u16 pix = be16_to_cpu(*(__be16 *)(src[i])); 314 315 *r++ = (u8)(((pix & 0xf800) >> 11) << 3) | 0x07; 316 *g++ = (u8)((((pix & 0x07e0) >> 5)) << 2) | 0x03; 317 *b++ = (u8)((pix & 0x1f) << 3) | 0x07; 318 } 319 break; 320 default: 321 case V4L2_PIX_FMT_RGB24: 322 for (i = 0; i < 2; i++) { 323 *r++ = src[i][0]; 324 *g++ = src[i][1]; 325 *b++ = src[i][2]; 326 } 327 break; 328 case V4L2_PIX_FMT_BGR24: 329 for (i = 0; i < 2; i++) { 330 *b++ = src[i][0]; 331 *g++ = src[i][1]; 332 *r++ = src[i][2]; 333 } 334 break; 335 } 336 337 /* Step 2: store two consecutive points, reversing them if needed */ 338 339 r = _r; 340 g = _g; 341 b = _b; 342 343 switch (out->fourcc) { 344 case V4L2_PIX_FMT_RGB565: /* rrrrrggg gggbbbbb */ 345 for (i = 0; i < 2; i++) { 346 u16 pix; 347 __le16 *dst_pix = (__le16 *)*dst; 348 349 pix = ((*r << 8) & 0xf800) | ((*g << 3) & 0x07e0) | 350 (*b >> 3); 351 352 *dst_pix = cpu_to_le16(pix); 353 354 *dst += 2; 355 } 356 return; 357 case V4L2_PIX_FMT_RGB565X: /* gggbbbbb rrrrrggg */ 358 for (i = 0; i < 2; i++) { 359 u16 pix; 360 __be16 *dst_pix = (__be16 *)*dst; 361 362 pix = ((*r << 8) & 0xf800) | ((*g << 3) & 0x07e0) | 363 (*b >> 3); 364 365 *dst_pix = cpu_to_be16(pix); 366 367 *dst += 2; 368 } 369 return; 370 case V4L2_PIX_FMT_RGB24: 371 for (i = 0; i < 2; i++) { 372 *(*dst)++ = *r++; 373 *(*dst)++ = *g++; 374 *(*dst)++ = *b++; 375 } 376 return; 377 case V4L2_PIX_FMT_BGR24: 378 for (i = 0; i < 2; i++) { 379 *(*dst)++ = *b++; 380 *(*dst)++ = *g++; 381 *(*dst)++ = *r++; 382 } 383 return; 384 case V4L2_PIX_FMT_YUYV: 385 default: 386 { 387 u8 y, y1, u, v; 388 389 y = ((8453 * (*r) + 16594 * (*g) + 3223 * (*b) 390 + 524288) >> 15); 391 u = ((-4878 * (*r) - 9578 * (*g) + 14456 * (*b) 392 + 4210688) >> 15); 393 v = ((14456 * (*r++) - 12105 * (*g++) - 2351 * (*b++) 394 + 4210688) >> 15); 395 y1 = ((8453 * (*r) + 16594 * (*g) + 3223 * (*b) 396 + 524288) >> 15); 397 398 *(*dst)++ = y; 399 *(*dst)++ = u; 400 401 *(*dst)++ = y1; 402 *(*dst)++ = v; 403 return; 404 } 405 case V4L2_PIX_FMT_SBGGR8: 406 if (!(ypos & 1)) { 407 *(*dst)++ = *b; 408 *(*dst)++ = *++g; 409 } else { 410 *(*dst)++ = *g; 411 *(*dst)++ = *++r; 412 } 413 return; 414 case V4L2_PIX_FMT_SGBRG8: 415 if (!(ypos & 1)) { 416 *(*dst)++ = *g; 417 *(*dst)++ = *++b; 418 } else { 419 *(*dst)++ = *r; 420 *(*dst)++ = *++g; 421 } 422 return; 423 case V4L2_PIX_FMT_SGRBG8: 424 if (!(ypos & 1)) { 425 *(*dst)++ = *g; 426 *(*dst)++ = *++r; 427 } else { 428 *(*dst)++ = *b; 429 *(*dst)++ = *++g; 430 } 431 return; 432 case V4L2_PIX_FMT_SRGGB8: 433 if (!(ypos & 1)) { 434 *(*dst)++ = *r; 435 *(*dst)++ = *++g; 436 } else { 437 *(*dst)++ = *g; 438 *(*dst)++ = *++b; 439 } 440 return; 441 } 442 } 443 444 static int device_process(struct vim2m_ctx *ctx, 445 struct vb2_v4l2_buffer *in_vb, 446 struct vb2_v4l2_buffer *out_vb) 447 { 448 struct vim2m_dev *dev = ctx->dev; 449 struct vim2m_q_data *q_data_in, *q_data_out; 450 u8 *p_in, *p_line, *p_in_x[2], *p, *p_out; 451 unsigned int width, height, bytesperline, bytes_per_pixel; 452 unsigned int x, y, y_in, y_out, x_int, x_fract, x_err, x_offset; 453 int start, end, step; 454 455 q_data_in = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT); 456 if (!q_data_in) 457 return 0; 458 bytesperline = (q_data_in->width * q_data_in->fmt->depth) >> 3; 459 bytes_per_pixel = q_data_in->fmt->depth >> 3; 460 461 q_data_out = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE); 462 if (!q_data_out) 463 return 0; 464 465 /* As we're doing scaling, use the output dimensions here */ 466 height = q_data_out->height; 467 width = q_data_out->width; 468 469 p_in = vb2_plane_vaddr(&in_vb->vb2_buf, 0); 470 p_out = vb2_plane_vaddr(&out_vb->vb2_buf, 0); 471 if (!p_in || !p_out) { 472 v4l2_err(&dev->v4l2_dev, 473 "Acquiring kernel pointers to buffers failed\n"); 474 return -EFAULT; 475 } 476 477 out_vb->sequence = q_data_out->sequence++; 478 in_vb->sequence = q_data_in->sequence++; 479 v4l2_m2m_buf_copy_metadata(in_vb, out_vb, true); 480 481 if (ctx->mode & MEM2MEM_VFLIP) { 482 start = height - 1; 483 end = -1; 484 step = -1; 485 } else { 486 start = 0; 487 end = height; 488 step = 1; 489 } 490 y_out = 0; 491 492 /* 493 * When format and resolution are identical, 494 * we can use a faster copy logic 495 */ 496 if (q_data_in->fmt->fourcc == q_data_out->fmt->fourcc && 497 q_data_in->width == q_data_out->width && 498 q_data_in->height == q_data_out->height) { 499 for (y = start; y != end; y += step, y_out++) { 500 p = p_in + (y * bytesperline); 501 if (ctx->mode & MEM2MEM_HFLIP) 502 p += bytesperline - (q_data_in->fmt->depth >> 3); 503 504 copy_line(q_data_out, p, p_out, 505 ctx->mode & MEM2MEM_HFLIP); 506 507 p_out += bytesperline; 508 } 509 return 0; 510 } 511 512 /* Slower algorithm with format conversion, hflip, vflip and scaler */ 513 514 /* To speed scaler up, use Bresenham for X dimension */ 515 x_int = q_data_in->width / q_data_out->width; 516 x_fract = q_data_in->width % q_data_out->width; 517 518 for (y = start; y != end; y += step, y_out++) { 519 y_in = (y * q_data_in->height) / q_data_out->height; 520 x_offset = 0; 521 x_err = 0; 522 523 p_line = p_in + (y_in * bytesperline); 524 if (ctx->mode & MEM2MEM_HFLIP) 525 p_line += bytesperline - (q_data_in->fmt->depth >> 3); 526 p_in_x[0] = p_line; 527 528 for (x = 0; x < width >> 1; x++) { 529 x_offset += x_int; 530 x_err += x_fract; 531 if (x_err > width) { 532 x_offset++; 533 x_err -= width; 534 } 535 536 if (ctx->mode & MEM2MEM_HFLIP) 537 p_in_x[1] = p_line - x_offset * bytes_per_pixel; 538 else 539 p_in_x[1] = p_line + x_offset * bytes_per_pixel; 540 541 copy_two_pixels(q_data_in, q_data_out, 542 p_in_x, &p_out, y_out, 543 ctx->mode & MEM2MEM_HFLIP); 544 545 /* Calculate the next p_in_x0 */ 546 x_offset += x_int; 547 x_err += x_fract; 548 if (x_err > width) { 549 x_offset++; 550 x_err -= width; 551 } 552 553 if (ctx->mode & MEM2MEM_HFLIP) 554 p_in_x[0] = p_line - x_offset * bytes_per_pixel; 555 else 556 p_in_x[0] = p_line + x_offset * bytes_per_pixel; 557 } 558 } 559 560 return 0; 561 } 562 563 /* 564 * mem2mem callbacks 565 */ 566 567 /* 568 * job_ready() - check whether an instance is ready to be scheduled to run 569 */ 570 static int job_ready(void *priv) 571 { 572 struct vim2m_ctx *ctx = priv; 573 574 if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen 575 || v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen) { 576 dprintk(ctx->dev, 1, "Not enough buffers available\n"); 577 return 0; 578 } 579 580 return 1; 581 } 582 583 static void job_abort(void *priv) 584 { 585 struct vim2m_ctx *ctx = priv; 586 587 /* Will cancel the transaction in the next interrupt handler */ 588 ctx->aborting = 1; 589 } 590 591 /* device_run() - prepares and starts the device 592 * 593 * This simulates all the immediate preparations required before starting 594 * a device. This will be called by the framework when it decides to schedule 595 * a particular instance. 596 */ 597 static void device_run(void *priv) 598 { 599 struct vim2m_ctx *ctx = priv; 600 struct vb2_v4l2_buffer *src_buf, *dst_buf; 601 602 src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx); 603 dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx); 604 605 /* Apply request controls if any */ 606 v4l2_ctrl_request_setup(src_buf->vb2_buf.req_obj.req, 607 &ctx->hdl); 608 609 device_process(ctx, src_buf, dst_buf); 610 611 /* Complete request controls if any */ 612 v4l2_ctrl_request_complete(src_buf->vb2_buf.req_obj.req, 613 &ctx->hdl); 614 615 /* Run delayed work, which simulates a hardware irq */ 616 schedule_delayed_work(&ctx->work_run, msecs_to_jiffies(ctx->transtime)); 617 } 618 619 static void device_work(struct work_struct *w) 620 { 621 struct vim2m_ctx *curr_ctx; 622 struct vim2m_dev *vim2m_dev; 623 struct vb2_v4l2_buffer *src_vb, *dst_vb; 624 625 curr_ctx = container_of(w, struct vim2m_ctx, work_run.work); 626 627 if (!curr_ctx) { 628 pr_err("Instance released before the end of transaction\n"); 629 return; 630 } 631 632 vim2m_dev = curr_ctx->dev; 633 634 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx); 635 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx); 636 637 curr_ctx->num_processed++; 638 639 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE); 640 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE); 641 642 if (curr_ctx->num_processed == curr_ctx->translen 643 || curr_ctx->aborting) { 644 dprintk(curr_ctx->dev, 2, "Finishing capture buffer fill\n"); 645 curr_ctx->num_processed = 0; 646 v4l2_m2m_job_finish(vim2m_dev->m2m_dev, curr_ctx->fh.m2m_ctx); 647 } else { 648 device_run(curr_ctx); 649 } 650 } 651 652 /* 653 * video ioctls 654 */ 655 static int vidioc_querycap(struct file *file, void *priv, 656 struct v4l2_capability *cap) 657 { 658 strscpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver)); 659 strscpy(cap->card, MEM2MEM_NAME, sizeof(cap->card)); 660 snprintf(cap->bus_info, sizeof(cap->bus_info), 661 "platform:%s", MEM2MEM_NAME); 662 return 0; 663 } 664 665 static int enum_fmt(struct v4l2_fmtdesc *f, u32 type) 666 { 667 int i, num; 668 struct vim2m_fmt *fmt; 669 670 num = 0; 671 672 for (i = 0; i < NUM_FORMATS; ++i) { 673 if (formats[i].types & type) { 674 /* index-th format of type type found ? */ 675 if (num == f->index) 676 break; 677 /* 678 * Correct type but haven't reached our index yet, 679 * just increment per-type index 680 */ 681 ++num; 682 } 683 } 684 685 if (i < NUM_FORMATS) { 686 /* Format found */ 687 fmt = &formats[i]; 688 f->pixelformat = fmt->fourcc; 689 return 0; 690 } 691 692 /* Format not found */ 693 return -EINVAL; 694 } 695 696 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 697 struct v4l2_fmtdesc *f) 698 { 699 return enum_fmt(f, MEM2MEM_CAPTURE); 700 } 701 702 static int vidioc_enum_fmt_vid_out(struct file *file, void *priv, 703 struct v4l2_fmtdesc *f) 704 { 705 return enum_fmt(f, MEM2MEM_OUTPUT); 706 } 707 708 static int vidioc_enum_framesizes(struct file *file, void *priv, 709 struct v4l2_frmsizeenum *fsize) 710 { 711 if (fsize->index != 0) 712 return -EINVAL; 713 714 if (!find_format(fsize->pixel_format)) 715 return -EINVAL; 716 717 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; 718 fsize->stepwise.min_width = MIN_W; 719 fsize->stepwise.min_height = MIN_H; 720 fsize->stepwise.max_width = MAX_W; 721 fsize->stepwise.max_height = MAX_H; 722 723 get_alignment(fsize->pixel_format, 724 &fsize->stepwise.step_width, 725 &fsize->stepwise.step_height); 726 return 0; 727 } 728 729 static int vidioc_g_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f) 730 { 731 struct vb2_queue *vq; 732 struct vim2m_q_data *q_data; 733 734 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type); 735 if (!vq) 736 return -EINVAL; 737 738 q_data = get_q_data(ctx, f->type); 739 if (!q_data) 740 return -EINVAL; 741 742 f->fmt.pix.width = q_data->width; 743 f->fmt.pix.height = q_data->height; 744 f->fmt.pix.field = V4L2_FIELD_NONE; 745 f->fmt.pix.pixelformat = q_data->fmt->fourcc; 746 f->fmt.pix.bytesperline = (q_data->width * q_data->fmt->depth) >> 3; 747 f->fmt.pix.sizeimage = q_data->sizeimage; 748 f->fmt.pix.colorspace = ctx->colorspace; 749 f->fmt.pix.xfer_func = ctx->xfer_func; 750 f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc; 751 f->fmt.pix.quantization = ctx->quant; 752 753 return 0; 754 } 755 756 static int vidioc_g_fmt_vid_out(struct file *file, void *priv, 757 struct v4l2_format *f) 758 { 759 return vidioc_g_fmt(file2ctx(file), f); 760 } 761 762 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 763 struct v4l2_format *f) 764 { 765 return vidioc_g_fmt(file2ctx(file), f); 766 } 767 768 static int vidioc_try_fmt(struct v4l2_format *f, struct vim2m_fmt *fmt) 769 { 770 int walign, halign; 771 /* 772 * V4L2 specification specifies the driver corrects the 773 * format struct if any of the dimensions is unsupported 774 */ 775 if (f->fmt.pix.height < MIN_H) 776 f->fmt.pix.height = MIN_H; 777 else if (f->fmt.pix.height > MAX_H) 778 f->fmt.pix.height = MAX_H; 779 780 if (f->fmt.pix.width < MIN_W) 781 f->fmt.pix.width = MIN_W; 782 else if (f->fmt.pix.width > MAX_W) 783 f->fmt.pix.width = MAX_W; 784 785 get_alignment(f->fmt.pix.pixelformat, &walign, &halign); 786 f->fmt.pix.width &= ~(walign - 1); 787 f->fmt.pix.height &= ~(halign - 1); 788 f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3; 789 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; 790 f->fmt.pix.field = V4L2_FIELD_NONE; 791 792 return 0; 793 } 794 795 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 796 struct v4l2_format *f) 797 { 798 struct vim2m_fmt *fmt; 799 struct vim2m_ctx *ctx = file2ctx(file); 800 801 fmt = find_format(f->fmt.pix.pixelformat); 802 if (!fmt) { 803 f->fmt.pix.pixelformat = formats[0].fourcc; 804 fmt = find_format(f->fmt.pix.pixelformat); 805 } 806 if (!(fmt->types & MEM2MEM_CAPTURE)) { 807 v4l2_err(&ctx->dev->v4l2_dev, 808 "Fourcc format (0x%08x) invalid.\n", 809 f->fmt.pix.pixelformat); 810 return -EINVAL; 811 } 812 f->fmt.pix.colorspace = ctx->colorspace; 813 f->fmt.pix.xfer_func = ctx->xfer_func; 814 f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc; 815 f->fmt.pix.quantization = ctx->quant; 816 817 return vidioc_try_fmt(f, fmt); 818 } 819 820 static int vidioc_try_fmt_vid_out(struct file *file, void *priv, 821 struct v4l2_format *f) 822 { 823 struct vim2m_fmt *fmt; 824 struct vim2m_ctx *ctx = file2ctx(file); 825 826 fmt = find_format(f->fmt.pix.pixelformat); 827 if (!fmt) { 828 f->fmt.pix.pixelformat = formats[0].fourcc; 829 fmt = find_format(f->fmt.pix.pixelformat); 830 } 831 if (!(fmt->types & MEM2MEM_OUTPUT)) { 832 v4l2_err(&ctx->dev->v4l2_dev, 833 "Fourcc format (0x%08x) invalid.\n", 834 f->fmt.pix.pixelformat); 835 return -EINVAL; 836 } 837 if (!f->fmt.pix.colorspace) 838 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709; 839 840 return vidioc_try_fmt(f, fmt); 841 } 842 843 static int vidioc_s_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f) 844 { 845 struct vim2m_q_data *q_data; 846 struct vb2_queue *vq; 847 848 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type); 849 if (!vq) 850 return -EINVAL; 851 852 q_data = get_q_data(ctx, f->type); 853 if (!q_data) 854 return -EINVAL; 855 856 if (vb2_is_busy(vq)) { 857 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__); 858 return -EBUSY; 859 } 860 861 q_data->fmt = find_format(f->fmt.pix.pixelformat); 862 q_data->width = f->fmt.pix.width; 863 q_data->height = f->fmt.pix.height; 864 q_data->sizeimage = q_data->width * q_data->height 865 * q_data->fmt->depth >> 3; 866 867 dprintk(ctx->dev, 1, 868 "Format for type %s: %dx%d (%d bpp), fmt: %c%c%c%c\n", 869 type_name(f->type), q_data->width, q_data->height, 870 q_data->fmt->depth, 871 (q_data->fmt->fourcc & 0xff), 872 (q_data->fmt->fourcc >> 8) & 0xff, 873 (q_data->fmt->fourcc >> 16) & 0xff, 874 (q_data->fmt->fourcc >> 24) & 0xff); 875 876 return 0; 877 } 878 879 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 880 struct v4l2_format *f) 881 { 882 int ret; 883 884 ret = vidioc_try_fmt_vid_cap(file, priv, f); 885 if (ret) 886 return ret; 887 888 return vidioc_s_fmt(file2ctx(file), f); 889 } 890 891 static int vidioc_s_fmt_vid_out(struct file *file, void *priv, 892 struct v4l2_format *f) 893 { 894 struct vim2m_ctx *ctx = file2ctx(file); 895 int ret; 896 897 ret = vidioc_try_fmt_vid_out(file, priv, f); 898 if (ret) 899 return ret; 900 901 ret = vidioc_s_fmt(file2ctx(file), f); 902 if (!ret) { 903 ctx->colorspace = f->fmt.pix.colorspace; 904 ctx->xfer_func = f->fmt.pix.xfer_func; 905 ctx->ycbcr_enc = f->fmt.pix.ycbcr_enc; 906 ctx->quant = f->fmt.pix.quantization; 907 } 908 return ret; 909 } 910 911 static int vim2m_s_ctrl(struct v4l2_ctrl *ctrl) 912 { 913 struct vim2m_ctx *ctx = 914 container_of(ctrl->handler, struct vim2m_ctx, hdl); 915 916 switch (ctrl->id) { 917 case V4L2_CID_HFLIP: 918 if (ctrl->val) 919 ctx->mode |= MEM2MEM_HFLIP; 920 else 921 ctx->mode &= ~MEM2MEM_HFLIP; 922 break; 923 924 case V4L2_CID_VFLIP: 925 if (ctrl->val) 926 ctx->mode |= MEM2MEM_VFLIP; 927 else 928 ctx->mode &= ~MEM2MEM_VFLIP; 929 break; 930 931 case V4L2_CID_TRANS_TIME_MSEC: 932 ctx->transtime = ctrl->val; 933 if (ctx->transtime < 1) 934 ctx->transtime = 1; 935 break; 936 937 case V4L2_CID_TRANS_NUM_BUFS: 938 ctx->translen = ctrl->val; 939 break; 940 941 default: 942 v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n"); 943 return -EINVAL; 944 } 945 946 return 0; 947 } 948 949 static const struct v4l2_ctrl_ops vim2m_ctrl_ops = { 950 .s_ctrl = vim2m_s_ctrl, 951 }; 952 953 static const struct v4l2_ioctl_ops vim2m_ioctl_ops = { 954 .vidioc_querycap = vidioc_querycap, 955 956 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 957 .vidioc_enum_framesizes = vidioc_enum_framesizes, 958 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 959 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 960 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 961 962 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out, 963 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out, 964 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out, 965 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out, 966 967 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs, 968 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf, 969 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf, 970 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf, 971 .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf, 972 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs, 973 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf, 974 975 .vidioc_streamon = v4l2_m2m_ioctl_streamon, 976 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff, 977 978 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 979 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 980 }; 981 982 /* 983 * Queue operations 984 */ 985 986 static int vim2m_queue_setup(struct vb2_queue *vq, 987 unsigned int *nbuffers, 988 unsigned int *nplanes, 989 unsigned int sizes[], 990 struct device *alloc_devs[]) 991 { 992 struct vim2m_ctx *ctx = vb2_get_drv_priv(vq); 993 struct vim2m_q_data *q_data; 994 unsigned int size, count = *nbuffers; 995 996 q_data = get_q_data(ctx, vq->type); 997 if (!q_data) 998 return -EINVAL; 999 1000 size = q_data->width * q_data->height * q_data->fmt->depth >> 3; 1001 1002 while (size * count > MEM2MEM_VID_MEM_LIMIT) 1003 (count)--; 1004 *nbuffers = count; 1005 1006 if (*nplanes) 1007 return sizes[0] < size ? -EINVAL : 0; 1008 1009 *nplanes = 1; 1010 sizes[0] = size; 1011 1012 dprintk(ctx->dev, 1, "%s: get %d buffer(s) of size %d each.\n", 1013 type_name(vq->type), count, size); 1014 1015 return 0; 1016 } 1017 1018 static int vim2m_buf_out_validate(struct vb2_buffer *vb) 1019 { 1020 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 1021 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 1022 1023 if (vbuf->field == V4L2_FIELD_ANY) 1024 vbuf->field = V4L2_FIELD_NONE; 1025 if (vbuf->field != V4L2_FIELD_NONE) { 1026 dprintk(ctx->dev, 1, "%s field isn't supported\n", __func__); 1027 return -EINVAL; 1028 } 1029 1030 return 0; 1031 } 1032 1033 static int vim2m_buf_prepare(struct vb2_buffer *vb) 1034 { 1035 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 1036 struct vim2m_q_data *q_data; 1037 1038 dprintk(ctx->dev, 2, "type: %s\n", type_name(vb->vb2_queue->type)); 1039 1040 q_data = get_q_data(ctx, vb->vb2_queue->type); 1041 if (!q_data) 1042 return -EINVAL; 1043 if (vb2_plane_size(vb, 0) < q_data->sizeimage) { 1044 dprintk(ctx->dev, 1, 1045 "%s data will not fit into plane (%lu < %lu)\n", 1046 __func__, vb2_plane_size(vb, 0), 1047 (long)q_data->sizeimage); 1048 return -EINVAL; 1049 } 1050 1051 vb2_set_plane_payload(vb, 0, q_data->sizeimage); 1052 1053 return 0; 1054 } 1055 1056 static void vim2m_buf_queue(struct vb2_buffer *vb) 1057 { 1058 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 1059 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 1060 1061 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf); 1062 } 1063 1064 static int vim2m_start_streaming(struct vb2_queue *q, unsigned int count) 1065 { 1066 struct vim2m_ctx *ctx = vb2_get_drv_priv(q); 1067 struct vim2m_q_data *q_data = get_q_data(ctx, q->type); 1068 1069 if (!q_data) 1070 return -EINVAL; 1071 1072 if (V4L2_TYPE_IS_OUTPUT(q->type)) 1073 ctx->aborting = 0; 1074 1075 q_data->sequence = 0; 1076 return 0; 1077 } 1078 1079 static void vim2m_stop_streaming(struct vb2_queue *q) 1080 { 1081 struct vim2m_ctx *ctx = vb2_get_drv_priv(q); 1082 struct vb2_v4l2_buffer *vbuf; 1083 1084 cancel_delayed_work_sync(&ctx->work_run); 1085 1086 for (;;) { 1087 if (V4L2_TYPE_IS_OUTPUT(q->type)) 1088 vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx); 1089 else 1090 vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx); 1091 if (!vbuf) 1092 return; 1093 v4l2_ctrl_request_complete(vbuf->vb2_buf.req_obj.req, 1094 &ctx->hdl); 1095 v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR); 1096 } 1097 } 1098 1099 static void vim2m_buf_request_complete(struct vb2_buffer *vb) 1100 { 1101 struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 1102 1103 v4l2_ctrl_request_complete(vb->req_obj.req, &ctx->hdl); 1104 } 1105 1106 static const struct vb2_ops vim2m_qops = { 1107 .queue_setup = vim2m_queue_setup, 1108 .buf_out_validate = vim2m_buf_out_validate, 1109 .buf_prepare = vim2m_buf_prepare, 1110 .buf_queue = vim2m_buf_queue, 1111 .start_streaming = vim2m_start_streaming, 1112 .stop_streaming = vim2m_stop_streaming, 1113 .wait_prepare = vb2_ops_wait_prepare, 1114 .wait_finish = vb2_ops_wait_finish, 1115 .buf_request_complete = vim2m_buf_request_complete, 1116 }; 1117 1118 static int queue_init(void *priv, struct vb2_queue *src_vq, 1119 struct vb2_queue *dst_vq) 1120 { 1121 struct vim2m_ctx *ctx = priv; 1122 int ret; 1123 1124 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 1125 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF; 1126 src_vq->drv_priv = ctx; 1127 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); 1128 src_vq->ops = &vim2m_qops; 1129 src_vq->mem_ops = &vb2_vmalloc_memops; 1130 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; 1131 src_vq->lock = &ctx->vb_mutex; 1132 src_vq->supports_requests = true; 1133 1134 ret = vb2_queue_init(src_vq); 1135 if (ret) 1136 return ret; 1137 1138 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1139 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF; 1140 dst_vq->drv_priv = ctx; 1141 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); 1142 dst_vq->ops = &vim2m_qops; 1143 dst_vq->mem_ops = &vb2_vmalloc_memops; 1144 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; 1145 dst_vq->lock = &ctx->vb_mutex; 1146 1147 return vb2_queue_init(dst_vq); 1148 } 1149 1150 static struct v4l2_ctrl_config vim2m_ctrl_trans_time_msec = { 1151 .ops = &vim2m_ctrl_ops, 1152 .id = V4L2_CID_TRANS_TIME_MSEC, 1153 .name = "Transaction Time (msec)", 1154 .type = V4L2_CTRL_TYPE_INTEGER, 1155 .min = 1, 1156 .max = 10001, 1157 .step = 1, 1158 }; 1159 1160 static const struct v4l2_ctrl_config vim2m_ctrl_trans_num_bufs = { 1161 .ops = &vim2m_ctrl_ops, 1162 .id = V4L2_CID_TRANS_NUM_BUFS, 1163 .name = "Buffers Per Transaction", 1164 .type = V4L2_CTRL_TYPE_INTEGER, 1165 .def = 1, 1166 .min = 1, 1167 .max = MEM2MEM_DEF_NUM_BUFS, 1168 .step = 1, 1169 }; 1170 1171 /* 1172 * File operations 1173 */ 1174 static int vim2m_open(struct file *file) 1175 { 1176 struct vim2m_dev *dev = video_drvdata(file); 1177 struct vim2m_ctx *ctx = NULL; 1178 struct v4l2_ctrl_handler *hdl; 1179 int rc = 0; 1180 1181 if (mutex_lock_interruptible(&dev->dev_mutex)) 1182 return -ERESTARTSYS; 1183 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 1184 if (!ctx) { 1185 rc = -ENOMEM; 1186 goto open_unlock; 1187 } 1188 1189 v4l2_fh_init(&ctx->fh, video_devdata(file)); 1190 file->private_data = &ctx->fh; 1191 ctx->dev = dev; 1192 hdl = &ctx->hdl; 1193 v4l2_ctrl_handler_init(hdl, 4); 1194 v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0); 1195 v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0); 1196 1197 vim2m_ctrl_trans_time_msec.def = default_transtime; 1198 v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_time_msec, NULL); 1199 v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_num_bufs, NULL); 1200 if (hdl->error) { 1201 rc = hdl->error; 1202 v4l2_ctrl_handler_free(hdl); 1203 kfree(ctx); 1204 goto open_unlock; 1205 } 1206 ctx->fh.ctrl_handler = hdl; 1207 v4l2_ctrl_handler_setup(hdl); 1208 1209 ctx->q_data[V4L2_M2M_SRC].fmt = &formats[0]; 1210 ctx->q_data[V4L2_M2M_SRC].width = 640; 1211 ctx->q_data[V4L2_M2M_SRC].height = 480; 1212 ctx->q_data[V4L2_M2M_SRC].sizeimage = 1213 ctx->q_data[V4L2_M2M_SRC].width * 1214 ctx->q_data[V4L2_M2M_SRC].height * 1215 (ctx->q_data[V4L2_M2M_SRC].fmt->depth >> 3); 1216 ctx->q_data[V4L2_M2M_DST] = ctx->q_data[V4L2_M2M_SRC]; 1217 ctx->colorspace = V4L2_COLORSPACE_REC709; 1218 1219 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init); 1220 1221 mutex_init(&ctx->vb_mutex); 1222 INIT_DELAYED_WORK(&ctx->work_run, device_work); 1223 1224 if (IS_ERR(ctx->fh.m2m_ctx)) { 1225 rc = PTR_ERR(ctx->fh.m2m_ctx); 1226 1227 v4l2_ctrl_handler_free(hdl); 1228 v4l2_fh_exit(&ctx->fh); 1229 kfree(ctx); 1230 goto open_unlock; 1231 } 1232 1233 v4l2_fh_add(&ctx->fh); 1234 atomic_inc(&dev->num_inst); 1235 1236 dprintk(dev, 1, "Created instance: %p, m2m_ctx: %p\n", 1237 ctx, ctx->fh.m2m_ctx); 1238 1239 open_unlock: 1240 mutex_unlock(&dev->dev_mutex); 1241 return rc; 1242 } 1243 1244 static int vim2m_release(struct file *file) 1245 { 1246 struct vim2m_dev *dev = video_drvdata(file); 1247 struct vim2m_ctx *ctx = file2ctx(file); 1248 1249 dprintk(dev, 1, "Releasing instance %p\n", ctx); 1250 1251 v4l2_fh_del(&ctx->fh); 1252 v4l2_fh_exit(&ctx->fh); 1253 v4l2_ctrl_handler_free(&ctx->hdl); 1254 mutex_lock(&dev->dev_mutex); 1255 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx); 1256 mutex_unlock(&dev->dev_mutex); 1257 kfree(ctx); 1258 1259 atomic_dec(&dev->num_inst); 1260 1261 return 0; 1262 } 1263 1264 static void vim2m_device_release(struct video_device *vdev) 1265 { 1266 struct vim2m_dev *dev = container_of(vdev, struct vim2m_dev, vfd); 1267 1268 v4l2_device_unregister(&dev->v4l2_dev); 1269 v4l2_m2m_release(dev->m2m_dev); 1270 #ifdef CONFIG_MEDIA_CONTROLLER 1271 media_device_cleanup(&dev->mdev); 1272 #endif 1273 kfree(dev); 1274 } 1275 1276 static const struct v4l2_file_operations vim2m_fops = { 1277 .owner = THIS_MODULE, 1278 .open = vim2m_open, 1279 .release = vim2m_release, 1280 .poll = v4l2_m2m_fop_poll, 1281 .unlocked_ioctl = video_ioctl2, 1282 .mmap = v4l2_m2m_fop_mmap, 1283 }; 1284 1285 static const struct video_device vim2m_videodev = { 1286 .name = MEM2MEM_NAME, 1287 .vfl_dir = VFL_DIR_M2M, 1288 .fops = &vim2m_fops, 1289 .ioctl_ops = &vim2m_ioctl_ops, 1290 .minor = -1, 1291 .release = vim2m_device_release, 1292 .device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING, 1293 }; 1294 1295 static const struct v4l2_m2m_ops m2m_ops = { 1296 .device_run = device_run, 1297 .job_ready = job_ready, 1298 .job_abort = job_abort, 1299 }; 1300 1301 static const struct media_device_ops m2m_media_ops = { 1302 .req_validate = vb2_request_validate, 1303 .req_queue = v4l2_m2m_request_queue, 1304 }; 1305 1306 static int vim2m_probe(struct platform_device *pdev) 1307 { 1308 struct vim2m_dev *dev; 1309 struct video_device *vfd; 1310 int ret; 1311 1312 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 1313 if (!dev) 1314 return -ENOMEM; 1315 1316 ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev); 1317 if (ret) 1318 goto error_free; 1319 1320 atomic_set(&dev->num_inst, 0); 1321 mutex_init(&dev->dev_mutex); 1322 1323 dev->vfd = vim2m_videodev; 1324 vfd = &dev->vfd; 1325 vfd->lock = &dev->dev_mutex; 1326 vfd->v4l2_dev = &dev->v4l2_dev; 1327 1328 video_set_drvdata(vfd, dev); 1329 v4l2_info(&dev->v4l2_dev, 1330 "Device registered as /dev/video%d\n", vfd->num); 1331 1332 platform_set_drvdata(pdev, dev); 1333 1334 dev->m2m_dev = v4l2_m2m_init(&m2m_ops); 1335 if (IS_ERR(dev->m2m_dev)) { 1336 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n"); 1337 ret = PTR_ERR(dev->m2m_dev); 1338 dev->m2m_dev = NULL; 1339 goto error_dev; 1340 } 1341 1342 ret = video_register_device(vfd, VFL_TYPE_VIDEO, 0); 1343 if (ret) { 1344 v4l2_err(&dev->v4l2_dev, "Failed to register video device\n"); 1345 goto error_m2m; 1346 } 1347 1348 #ifdef CONFIG_MEDIA_CONTROLLER 1349 dev->mdev.dev = &pdev->dev; 1350 strscpy(dev->mdev.model, "vim2m", sizeof(dev->mdev.model)); 1351 strscpy(dev->mdev.bus_info, "platform:vim2m", 1352 sizeof(dev->mdev.bus_info)); 1353 media_device_init(&dev->mdev); 1354 dev->mdev.ops = &m2m_media_ops; 1355 dev->v4l2_dev.mdev = &dev->mdev; 1356 1357 ret = v4l2_m2m_register_media_controller(dev->m2m_dev, vfd, 1358 MEDIA_ENT_F_PROC_VIDEO_SCALER); 1359 if (ret) { 1360 v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller\n"); 1361 goto error_v4l2; 1362 } 1363 1364 ret = media_device_register(&dev->mdev); 1365 if (ret) { 1366 v4l2_err(&dev->v4l2_dev, "Failed to register mem2mem media device\n"); 1367 goto error_m2m_mc; 1368 } 1369 #endif 1370 return 0; 1371 1372 #ifdef CONFIG_MEDIA_CONTROLLER 1373 error_m2m_mc: 1374 v4l2_m2m_unregister_media_controller(dev->m2m_dev); 1375 #endif 1376 error_v4l2: 1377 video_unregister_device(&dev->vfd); 1378 /* vim2m_device_release called by video_unregister_device to release various objects */ 1379 return ret; 1380 error_m2m: 1381 v4l2_m2m_release(dev->m2m_dev); 1382 error_dev: 1383 v4l2_device_unregister(&dev->v4l2_dev); 1384 error_free: 1385 kfree(dev); 1386 1387 return ret; 1388 } 1389 1390 static int vim2m_remove(struct platform_device *pdev) 1391 { 1392 struct vim2m_dev *dev = platform_get_drvdata(pdev); 1393 1394 v4l2_info(&dev->v4l2_dev, "Removing " MEM2MEM_NAME); 1395 1396 #ifdef CONFIG_MEDIA_CONTROLLER 1397 media_device_unregister(&dev->mdev); 1398 v4l2_m2m_unregister_media_controller(dev->m2m_dev); 1399 #endif 1400 video_unregister_device(&dev->vfd); 1401 1402 return 0; 1403 } 1404 1405 static struct platform_driver vim2m_pdrv = { 1406 .probe = vim2m_probe, 1407 .remove = vim2m_remove, 1408 .driver = { 1409 .name = MEM2MEM_NAME, 1410 }, 1411 }; 1412 1413 static void __exit vim2m_exit(void) 1414 { 1415 platform_driver_unregister(&vim2m_pdrv); 1416 platform_device_unregister(&vim2m_pdev); 1417 } 1418 1419 static int __init vim2m_init(void) 1420 { 1421 int ret; 1422 1423 ret = platform_device_register(&vim2m_pdev); 1424 if (ret) 1425 return ret; 1426 1427 ret = platform_driver_register(&vim2m_pdrv); 1428 if (ret) 1429 platform_device_unregister(&vim2m_pdev); 1430 1431 return ret; 1432 } 1433 1434 module_init(vim2m_init); 1435 module_exit(vim2m_exit); 1436