1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2011 - 2012 Samsung Electronics Co., Ltd. 4 * http://www.samsung.com 5 * 6 * Samsung EXYNOS5 SoC series G-Scaler driver 7 */ 8 9 #include <linux/module.h> 10 #include <linux/kernel.h> 11 #include <linux/types.h> 12 #include <linux/errno.h> 13 #include <linux/bug.h> 14 #include <linux/interrupt.h> 15 #include <linux/workqueue.h> 16 #include <linux/device.h> 17 #include <linux/platform_device.h> 18 #include <linux/list.h> 19 #include <linux/io.h> 20 #include <linux/slab.h> 21 #include <linux/clk.h> 22 23 #include <media/v4l2-ioctl.h> 24 25 #include "gsc-core.h" 26 27 static int gsc_m2m_ctx_stop_req(struct gsc_ctx *ctx) 28 { 29 struct gsc_ctx *curr_ctx; 30 struct gsc_dev *gsc = ctx->gsc_dev; 31 int ret; 32 33 curr_ctx = v4l2_m2m_get_curr_priv(gsc->m2m.m2m_dev); 34 if (!gsc_m2m_pending(gsc) || (curr_ctx != ctx)) 35 return 0; 36 37 gsc_ctx_state_lock_set(GSC_CTX_STOP_REQ, ctx); 38 ret = wait_event_timeout(gsc->irq_queue, 39 !gsc_ctx_state_is_set(GSC_CTX_STOP_REQ, ctx), 40 GSC_SHUTDOWN_TIMEOUT); 41 42 return ret == 0 ? -ETIMEDOUT : ret; 43 } 44 45 static void __gsc_m2m_job_abort(struct gsc_ctx *ctx) 46 { 47 int ret; 48 49 ret = gsc_m2m_ctx_stop_req(ctx); 50 if ((ret == -ETIMEDOUT) || (ctx->state & GSC_CTX_ABORT)) { 51 gsc_ctx_state_lock_clear(GSC_CTX_STOP_REQ | GSC_CTX_ABORT, ctx); 52 gsc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR); 53 } 54 } 55 56 static int gsc_m2m_start_streaming(struct vb2_queue *q, unsigned int count) 57 { 58 struct gsc_ctx *ctx = q->drv_priv; 59 60 return pm_runtime_resume_and_get(&ctx->gsc_dev->pdev->dev); 61 } 62 63 static void __gsc_m2m_cleanup_queue(struct gsc_ctx *ctx) 64 { 65 struct vb2_v4l2_buffer *src_vb, *dst_vb; 66 67 while (v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) > 0) { 68 src_vb = v4l2_m2m_src_buf_remove(ctx->m2m_ctx); 69 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_ERROR); 70 } 71 72 while (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) > 0) { 73 dst_vb = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx); 74 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_ERROR); 75 } 76 } 77 78 static void gsc_m2m_stop_streaming(struct vb2_queue *q) 79 { 80 struct gsc_ctx *ctx = q->drv_priv; 81 82 __gsc_m2m_job_abort(ctx); 83 84 __gsc_m2m_cleanup_queue(ctx); 85 86 pm_runtime_put(&ctx->gsc_dev->pdev->dev); 87 } 88 89 void gsc_m2m_job_finish(struct gsc_ctx *ctx, int vb_state) 90 { 91 struct vb2_v4l2_buffer *src_vb, *dst_vb; 92 93 if (!ctx || !ctx->m2m_ctx) 94 return; 95 96 src_vb = v4l2_m2m_src_buf_remove(ctx->m2m_ctx); 97 dst_vb = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx); 98 99 if (src_vb && dst_vb) { 100 dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp; 101 dst_vb->timecode = src_vb->timecode; 102 dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK; 103 dst_vb->flags |= 104 src_vb->flags 105 & V4L2_BUF_FLAG_TSTAMP_SRC_MASK; 106 107 v4l2_m2m_buf_done(src_vb, vb_state); 108 v4l2_m2m_buf_done(dst_vb, vb_state); 109 110 v4l2_m2m_job_finish(ctx->gsc_dev->m2m.m2m_dev, 111 ctx->m2m_ctx); 112 } 113 } 114 115 static void gsc_m2m_job_abort(void *priv) 116 { 117 __gsc_m2m_job_abort((struct gsc_ctx *)priv); 118 } 119 120 static int gsc_get_bufs(struct gsc_ctx *ctx) 121 { 122 struct gsc_frame *s_frame, *d_frame; 123 struct vb2_v4l2_buffer *src_vb, *dst_vb; 124 int ret; 125 126 s_frame = &ctx->s_frame; 127 d_frame = &ctx->d_frame; 128 129 src_vb = v4l2_m2m_next_src_buf(ctx->m2m_ctx); 130 ret = gsc_prepare_addr(ctx, &src_vb->vb2_buf, s_frame, &s_frame->addr); 131 if (ret) 132 return ret; 133 134 dst_vb = v4l2_m2m_next_dst_buf(ctx->m2m_ctx); 135 ret = gsc_prepare_addr(ctx, &dst_vb->vb2_buf, d_frame, &d_frame->addr); 136 if (ret) 137 return ret; 138 139 dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp; 140 141 return 0; 142 } 143 144 static void gsc_m2m_device_run(void *priv) 145 { 146 struct gsc_ctx *ctx = priv; 147 struct gsc_dev *gsc; 148 unsigned long flags; 149 int ret; 150 bool is_set = false; 151 152 if (WARN(!ctx, "null hardware context\n")) 153 return; 154 155 gsc = ctx->gsc_dev; 156 spin_lock_irqsave(&gsc->slock, flags); 157 158 set_bit(ST_M2M_PEND, &gsc->state); 159 160 /* Reconfigure hardware if the context has changed. */ 161 if (gsc->m2m.ctx != ctx) { 162 pr_debug("gsc->m2m.ctx = 0x%p, current_ctx = 0x%p", 163 gsc->m2m.ctx, ctx); 164 ctx->state |= GSC_PARAMS; 165 gsc->m2m.ctx = ctx; 166 } 167 168 is_set = ctx->state & GSC_CTX_STOP_REQ; 169 if (is_set) { 170 ctx->state &= ~GSC_CTX_STOP_REQ; 171 ctx->state |= GSC_CTX_ABORT; 172 wake_up(&gsc->irq_queue); 173 goto put_device; 174 } 175 176 ret = gsc_get_bufs(ctx); 177 if (ret) { 178 pr_err("Wrong address"); 179 goto put_device; 180 } 181 182 gsc_set_prefbuf(gsc, &ctx->s_frame); 183 gsc_hw_set_input_addr(gsc, &ctx->s_frame.addr, GSC_M2M_BUF_NUM); 184 gsc_hw_set_output_addr(gsc, &ctx->d_frame.addr, GSC_M2M_BUF_NUM); 185 186 if (ctx->state & GSC_PARAMS) { 187 gsc_hw_set_input_buf_masking(gsc, GSC_M2M_BUF_NUM, false); 188 gsc_hw_set_output_buf_masking(gsc, GSC_M2M_BUF_NUM, false); 189 gsc_hw_set_frm_done_irq_mask(gsc, false); 190 gsc_hw_set_gsc_irq_enable(gsc, true); 191 192 if (gsc_set_scaler_info(ctx)) { 193 pr_err("Scaler setup error"); 194 goto put_device; 195 } 196 197 gsc_hw_set_input_path(ctx); 198 gsc_hw_set_in_size(ctx); 199 gsc_hw_set_in_image_format(ctx); 200 201 gsc_hw_set_output_path(ctx); 202 gsc_hw_set_out_size(ctx); 203 gsc_hw_set_out_image_format(ctx); 204 205 gsc_hw_set_prescaler(ctx); 206 gsc_hw_set_mainscaler(ctx); 207 gsc_hw_set_rotation(ctx); 208 gsc_hw_set_global_alpha(ctx); 209 } 210 211 /* update shadow registers */ 212 gsc_hw_set_sfr_update(ctx); 213 214 ctx->state &= ~GSC_PARAMS; 215 gsc_hw_enable_control(gsc, true); 216 217 spin_unlock_irqrestore(&gsc->slock, flags); 218 return; 219 220 put_device: 221 ctx->state &= ~GSC_PARAMS; 222 spin_unlock_irqrestore(&gsc->slock, flags); 223 } 224 225 static int gsc_m2m_queue_setup(struct vb2_queue *vq, 226 unsigned int *num_buffers, unsigned int *num_planes, 227 unsigned int sizes[], struct device *alloc_devs[]) 228 { 229 struct gsc_ctx *ctx = vb2_get_drv_priv(vq); 230 struct gsc_frame *frame; 231 int i; 232 233 frame = ctx_get_frame(ctx, vq->type); 234 if (IS_ERR(frame)) 235 return PTR_ERR(frame); 236 237 if (!frame->fmt) 238 return -EINVAL; 239 240 *num_planes = frame->fmt->num_planes; 241 for (i = 0; i < frame->fmt->num_planes; i++) 242 sizes[i] = frame->payload[i]; 243 return 0; 244 } 245 246 static int gsc_m2m_buf_prepare(struct vb2_buffer *vb) 247 { 248 struct gsc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 249 struct gsc_frame *frame; 250 int i; 251 252 frame = ctx_get_frame(ctx, vb->vb2_queue->type); 253 if (IS_ERR(frame)) 254 return PTR_ERR(frame); 255 256 if (V4L2_TYPE_IS_CAPTURE(vb->vb2_queue->type)) { 257 for (i = 0; i < frame->fmt->num_planes; i++) 258 vb2_set_plane_payload(vb, i, frame->payload[i]); 259 } 260 261 return 0; 262 } 263 264 static void gsc_m2m_buf_queue(struct vb2_buffer *vb) 265 { 266 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 267 struct gsc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); 268 269 pr_debug("ctx: %p, ctx->state: 0x%x", ctx, ctx->state); 270 271 if (ctx->m2m_ctx) 272 v4l2_m2m_buf_queue(ctx->m2m_ctx, vbuf); 273 } 274 275 static const struct vb2_ops gsc_m2m_qops = { 276 .queue_setup = gsc_m2m_queue_setup, 277 .buf_prepare = gsc_m2m_buf_prepare, 278 .buf_queue = gsc_m2m_buf_queue, 279 .stop_streaming = gsc_m2m_stop_streaming, 280 .start_streaming = gsc_m2m_start_streaming, 281 }; 282 283 static int gsc_m2m_querycap(struct file *file, void *fh, 284 struct v4l2_capability *cap) 285 { 286 strscpy(cap->driver, GSC_MODULE_NAME, sizeof(cap->driver)); 287 strscpy(cap->card, GSC_MODULE_NAME " gscaler", sizeof(cap->card)); 288 return 0; 289 } 290 291 static int gsc_m2m_enum_fmt(struct file *file, void *priv, 292 struct v4l2_fmtdesc *f) 293 { 294 return gsc_enum_fmt(f); 295 } 296 297 static int gsc_m2m_g_fmt_mplane(struct file *file, void *fh, 298 struct v4l2_format *f) 299 { 300 struct gsc_ctx *ctx = file_to_ctx(file); 301 302 return gsc_g_fmt_mplane(ctx, f); 303 } 304 305 static int gsc_m2m_try_fmt_mplane(struct file *file, void *fh, 306 struct v4l2_format *f) 307 { 308 struct gsc_ctx *ctx = file_to_ctx(file); 309 310 return gsc_try_fmt_mplane(ctx, f); 311 } 312 313 static int gsc_m2m_s_fmt_mplane(struct file *file, void *fh, 314 struct v4l2_format *f) 315 { 316 struct gsc_ctx *ctx = file_to_ctx(file); 317 struct vb2_queue *vq; 318 struct gsc_frame *frame; 319 struct v4l2_pix_format_mplane *pix; 320 int i, ret = 0; 321 322 ret = gsc_m2m_try_fmt_mplane(file, fh, f); 323 if (ret) 324 return ret; 325 326 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); 327 328 if (vb2_is_streaming(vq)) { 329 pr_err("queue (%d) busy", f->type); 330 return -EBUSY; 331 } 332 333 if (V4L2_TYPE_IS_OUTPUT(f->type)) 334 frame = &ctx->s_frame; 335 else 336 frame = &ctx->d_frame; 337 338 pix = &f->fmt.pix_mp; 339 frame->fmt = find_fmt(&pix->pixelformat, NULL, 0); 340 frame->colorspace = pix->colorspace; 341 if (!frame->fmt) 342 return -EINVAL; 343 344 for (i = 0; i < frame->fmt->num_planes; i++) 345 frame->payload[i] = pix->plane_fmt[i].sizeimage; 346 347 gsc_set_frame_size(frame, pix->width, pix->height); 348 349 if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 350 gsc_ctx_state_lock_set(GSC_PARAMS | GSC_DST_FMT, ctx); 351 else 352 gsc_ctx_state_lock_set(GSC_PARAMS | GSC_SRC_FMT, ctx); 353 354 pr_debug("f_w: %d, f_h: %d", frame->f_width, frame->f_height); 355 356 return 0; 357 } 358 359 static int gsc_m2m_reqbufs(struct file *file, void *fh, 360 struct v4l2_requestbuffers *reqbufs) 361 { 362 struct gsc_ctx *ctx = file_to_ctx(file); 363 struct gsc_dev *gsc = ctx->gsc_dev; 364 u32 max_cnt; 365 366 max_cnt = (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ? 367 gsc->variant->in_buf_cnt : gsc->variant->out_buf_cnt; 368 if (reqbufs->count > max_cnt) 369 return -EINVAL; 370 371 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs); 372 } 373 374 static int gsc_m2m_expbuf(struct file *file, void *fh, 375 struct v4l2_exportbuffer *eb) 376 { 377 struct gsc_ctx *ctx = file_to_ctx(file); 378 return v4l2_m2m_expbuf(file, ctx->m2m_ctx, eb); 379 } 380 381 static int gsc_m2m_querybuf(struct file *file, void *fh, 382 struct v4l2_buffer *buf) 383 { 384 struct gsc_ctx *ctx = file_to_ctx(file); 385 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf); 386 } 387 388 static int gsc_m2m_qbuf(struct file *file, void *fh, 389 struct v4l2_buffer *buf) 390 { 391 struct gsc_ctx *ctx = file_to_ctx(file); 392 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf); 393 } 394 395 static int gsc_m2m_dqbuf(struct file *file, void *fh, 396 struct v4l2_buffer *buf) 397 { 398 struct gsc_ctx *ctx = file_to_ctx(file); 399 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf); 400 } 401 402 static int gsc_m2m_streamon(struct file *file, void *fh, 403 enum v4l2_buf_type type) 404 { 405 struct gsc_ctx *ctx = file_to_ctx(file); 406 407 /* The source and target color format need to be set */ 408 if (V4L2_TYPE_IS_OUTPUT(type)) { 409 if (!gsc_ctx_state_is_set(GSC_SRC_FMT, ctx)) 410 return -EINVAL; 411 } else if (!gsc_ctx_state_is_set(GSC_DST_FMT, ctx)) { 412 return -EINVAL; 413 } 414 415 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type); 416 } 417 418 static int gsc_m2m_streamoff(struct file *file, void *fh, 419 enum v4l2_buf_type type) 420 { 421 struct gsc_ctx *ctx = file_to_ctx(file); 422 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type); 423 } 424 425 /* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */ 426 static int is_rectangle_enclosed(struct v4l2_rect *a, struct v4l2_rect *b) 427 { 428 if (a->left < b->left || a->top < b->top) 429 return 0; 430 431 if (a->left + a->width > b->left + b->width) 432 return 0; 433 434 if (a->top + a->height > b->top + b->height) 435 return 0; 436 437 return 1; 438 } 439 440 static int gsc_m2m_g_selection(struct file *file, void *fh, 441 struct v4l2_selection *s) 442 { 443 struct gsc_ctx *ctx = file_to_ctx(file); 444 struct gsc_frame *frame; 445 446 if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) && 447 (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)) 448 return -EINVAL; 449 450 frame = ctx_get_frame(ctx, s->type); 451 if (IS_ERR(frame)) 452 return PTR_ERR(frame); 453 454 switch (s->target) { 455 case V4L2_SEL_TGT_COMPOSE_DEFAULT: 456 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 457 case V4L2_SEL_TGT_CROP_BOUNDS: 458 case V4L2_SEL_TGT_CROP_DEFAULT: 459 s->r.left = 0; 460 s->r.top = 0; 461 s->r.width = frame->f_width; 462 s->r.height = frame->f_height; 463 return 0; 464 465 case V4L2_SEL_TGT_COMPOSE: 466 case V4L2_SEL_TGT_CROP: 467 s->r.left = frame->crop.left; 468 s->r.top = frame->crop.top; 469 s->r.width = frame->crop.width; 470 s->r.height = frame->crop.height; 471 return 0; 472 } 473 474 return -EINVAL; 475 } 476 477 static int gsc_m2m_s_selection(struct file *file, void *fh, 478 struct v4l2_selection *s) 479 { 480 struct gsc_frame *frame; 481 struct gsc_ctx *ctx = file_to_ctx(file); 482 struct gsc_variant *variant = ctx->gsc_dev->variant; 483 struct v4l2_selection sel = *s; 484 int ret; 485 486 if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) && 487 (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)) 488 return -EINVAL; 489 490 ret = gsc_try_selection(ctx, &sel); 491 if (ret) 492 return ret; 493 494 if (s->flags & V4L2_SEL_FLAG_LE && 495 !is_rectangle_enclosed(&sel.r, &s->r)) 496 return -ERANGE; 497 498 if (s->flags & V4L2_SEL_FLAG_GE && 499 !is_rectangle_enclosed(&s->r, &sel.r)) 500 return -ERANGE; 501 502 s->r = sel.r; 503 504 switch (s->target) { 505 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 506 case V4L2_SEL_TGT_COMPOSE_DEFAULT: 507 case V4L2_SEL_TGT_COMPOSE: 508 frame = &ctx->s_frame; 509 break; 510 511 case V4L2_SEL_TGT_CROP_BOUNDS: 512 case V4L2_SEL_TGT_CROP: 513 case V4L2_SEL_TGT_CROP_DEFAULT: 514 frame = &ctx->d_frame; 515 break; 516 517 default: 518 return -EINVAL; 519 } 520 521 /* Check to see if scaling ratio is within supported range */ 522 if (gsc_ctx_state_is_set(GSC_DST_FMT | GSC_SRC_FMT, ctx)) { 523 if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 524 ret = gsc_check_scaler_ratio(variant, sel.r.width, 525 sel.r.height, ctx->d_frame.crop.width, 526 ctx->d_frame.crop.height, 527 ctx->gsc_ctrls.rotate->val, ctx->out_path); 528 } else { 529 ret = gsc_check_scaler_ratio(variant, 530 ctx->s_frame.crop.width, 531 ctx->s_frame.crop.height, sel.r.width, 532 sel.r.height, ctx->gsc_ctrls.rotate->val, 533 ctx->out_path); 534 } 535 536 if (ret) { 537 pr_err("Out of scaler range"); 538 return -EINVAL; 539 } 540 } 541 542 frame->crop = sel.r; 543 544 gsc_ctx_state_lock_set(GSC_PARAMS, ctx); 545 return 0; 546 } 547 548 static const struct v4l2_ioctl_ops gsc_m2m_ioctl_ops = { 549 .vidioc_querycap = gsc_m2m_querycap, 550 .vidioc_enum_fmt_vid_cap = gsc_m2m_enum_fmt, 551 .vidioc_enum_fmt_vid_out = gsc_m2m_enum_fmt, 552 .vidioc_g_fmt_vid_cap_mplane = gsc_m2m_g_fmt_mplane, 553 .vidioc_g_fmt_vid_out_mplane = gsc_m2m_g_fmt_mplane, 554 .vidioc_try_fmt_vid_cap_mplane = gsc_m2m_try_fmt_mplane, 555 .vidioc_try_fmt_vid_out_mplane = gsc_m2m_try_fmt_mplane, 556 .vidioc_s_fmt_vid_cap_mplane = gsc_m2m_s_fmt_mplane, 557 .vidioc_s_fmt_vid_out_mplane = gsc_m2m_s_fmt_mplane, 558 .vidioc_reqbufs = gsc_m2m_reqbufs, 559 .vidioc_expbuf = gsc_m2m_expbuf, 560 .vidioc_querybuf = gsc_m2m_querybuf, 561 .vidioc_qbuf = gsc_m2m_qbuf, 562 .vidioc_dqbuf = gsc_m2m_dqbuf, 563 .vidioc_streamon = gsc_m2m_streamon, 564 .vidioc_streamoff = gsc_m2m_streamoff, 565 .vidioc_g_selection = gsc_m2m_g_selection, 566 .vidioc_s_selection = gsc_m2m_s_selection 567 }; 568 569 static int queue_init(void *priv, struct vb2_queue *src_vq, 570 struct vb2_queue *dst_vq) 571 { 572 struct gsc_ctx *ctx = priv; 573 int ret; 574 575 memset(src_vq, 0, sizeof(*src_vq)); 576 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; 577 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF; 578 src_vq->drv_priv = ctx; 579 src_vq->ops = &gsc_m2m_qops; 580 src_vq->mem_ops = &vb2_dma_contig_memops; 581 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); 582 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; 583 src_vq->lock = &ctx->gsc_dev->lock; 584 src_vq->dev = &ctx->gsc_dev->pdev->dev; 585 586 ret = vb2_queue_init(src_vq); 587 if (ret) 588 return ret; 589 590 memset(dst_vq, 0, sizeof(*dst_vq)); 591 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; 592 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF; 593 dst_vq->drv_priv = ctx; 594 dst_vq->ops = &gsc_m2m_qops; 595 dst_vq->mem_ops = &vb2_dma_contig_memops; 596 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); 597 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; 598 dst_vq->lock = &ctx->gsc_dev->lock; 599 dst_vq->dev = &ctx->gsc_dev->pdev->dev; 600 601 return vb2_queue_init(dst_vq); 602 } 603 604 static int gsc_m2m_open(struct file *file) 605 { 606 struct gsc_dev *gsc = video_drvdata(file); 607 struct gsc_ctx *ctx = NULL; 608 int ret; 609 610 pr_debug("pid: %d, state: 0x%lx", task_pid_nr(current), gsc->state); 611 612 if (mutex_lock_interruptible(&gsc->lock)) 613 return -ERESTARTSYS; 614 615 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 616 if (!ctx) { 617 ret = -ENOMEM; 618 goto unlock; 619 } 620 621 v4l2_fh_init(&ctx->fh, gsc->m2m.vfd); 622 ret = gsc_ctrls_create(ctx); 623 if (ret) 624 goto error_fh; 625 626 /* Use separate control handler per file handle */ 627 ctx->fh.ctrl_handler = &ctx->ctrl_handler; 628 v4l2_fh_add(&ctx->fh, file); 629 630 ctx->gsc_dev = gsc; 631 /* Default color format */ 632 ctx->s_frame.fmt = get_format(0); 633 ctx->d_frame.fmt = get_format(0); 634 /* Setup the device context for mem2mem mode. */ 635 ctx->state = GSC_CTX_M2M; 636 ctx->flags = 0; 637 ctx->in_path = GSC_DMA; 638 ctx->out_path = GSC_DMA; 639 640 ctx->m2m_ctx = v4l2_m2m_ctx_init(gsc->m2m.m2m_dev, ctx, queue_init); 641 if (IS_ERR(ctx->m2m_ctx)) { 642 pr_err("Failed to initialize m2m context"); 643 ret = PTR_ERR(ctx->m2m_ctx); 644 goto error_ctrls; 645 } 646 647 if (gsc->m2m.refcnt++ == 0) 648 set_bit(ST_M2M_OPEN, &gsc->state); 649 650 pr_debug("gsc m2m driver is opened, ctx(0x%p)", ctx); 651 652 mutex_unlock(&gsc->lock); 653 return 0; 654 655 error_ctrls: 656 gsc_ctrls_delete(ctx); 657 v4l2_fh_del(&ctx->fh, file); 658 error_fh: 659 v4l2_fh_exit(&ctx->fh); 660 kfree(ctx); 661 unlock: 662 mutex_unlock(&gsc->lock); 663 return ret; 664 } 665 666 static int gsc_m2m_release(struct file *file) 667 { 668 struct gsc_ctx *ctx = file_to_ctx(file); 669 struct gsc_dev *gsc = ctx->gsc_dev; 670 671 pr_debug("pid: %d, state: 0x%lx, refcnt= %d", 672 task_pid_nr(current), gsc->state, gsc->m2m.refcnt); 673 674 mutex_lock(&gsc->lock); 675 676 v4l2_m2m_ctx_release(ctx->m2m_ctx); 677 gsc_ctrls_delete(ctx); 678 v4l2_fh_del(&ctx->fh, file); 679 v4l2_fh_exit(&ctx->fh); 680 681 if (--gsc->m2m.refcnt <= 0) 682 clear_bit(ST_M2M_OPEN, &gsc->state); 683 kfree(ctx); 684 685 mutex_unlock(&gsc->lock); 686 return 0; 687 } 688 689 static __poll_t gsc_m2m_poll(struct file *file, 690 struct poll_table_struct *wait) 691 { 692 struct gsc_ctx *ctx = file_to_ctx(file); 693 struct gsc_dev *gsc = ctx->gsc_dev; 694 __poll_t ret; 695 696 if (mutex_lock_interruptible(&gsc->lock)) 697 return EPOLLERR; 698 699 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait); 700 mutex_unlock(&gsc->lock); 701 702 return ret; 703 } 704 705 static int gsc_m2m_mmap(struct file *file, struct vm_area_struct *vma) 706 { 707 struct gsc_ctx *ctx = file_to_ctx(file); 708 struct gsc_dev *gsc = ctx->gsc_dev; 709 int ret; 710 711 if (mutex_lock_interruptible(&gsc->lock)) 712 return -ERESTARTSYS; 713 714 ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); 715 mutex_unlock(&gsc->lock); 716 717 return ret; 718 } 719 720 static const struct v4l2_file_operations gsc_m2m_fops = { 721 .owner = THIS_MODULE, 722 .open = gsc_m2m_open, 723 .release = gsc_m2m_release, 724 .poll = gsc_m2m_poll, 725 .unlocked_ioctl = video_ioctl2, 726 .mmap = gsc_m2m_mmap, 727 }; 728 729 static const struct v4l2_m2m_ops gsc_m2m_ops = { 730 .device_run = gsc_m2m_device_run, 731 .job_abort = gsc_m2m_job_abort, 732 }; 733 734 int gsc_register_m2m_device(struct gsc_dev *gsc) 735 { 736 struct platform_device *pdev; 737 int ret; 738 739 if (!gsc) 740 return -ENODEV; 741 742 pdev = gsc->pdev; 743 744 gsc->vdev.fops = &gsc_m2m_fops; 745 gsc->vdev.ioctl_ops = &gsc_m2m_ioctl_ops; 746 gsc->vdev.release = video_device_release_empty; 747 gsc->vdev.lock = &gsc->lock; 748 gsc->vdev.vfl_dir = VFL_DIR_M2M; 749 gsc->vdev.v4l2_dev = &gsc->v4l2_dev; 750 gsc->vdev.device_caps = V4L2_CAP_STREAMING | 751 V4L2_CAP_VIDEO_M2M_MPLANE; 752 snprintf(gsc->vdev.name, sizeof(gsc->vdev.name), "%s.%d:m2m", 753 GSC_MODULE_NAME, gsc->id); 754 755 video_set_drvdata(&gsc->vdev, gsc); 756 757 gsc->m2m.vfd = &gsc->vdev; 758 gsc->m2m.m2m_dev = v4l2_m2m_init(&gsc_m2m_ops); 759 if (IS_ERR(gsc->m2m.m2m_dev)) { 760 dev_err(&pdev->dev, "failed to initialize v4l2-m2m device\n"); 761 return PTR_ERR(gsc->m2m.m2m_dev); 762 } 763 764 ret = video_register_device(&gsc->vdev, VFL_TYPE_VIDEO, -1); 765 if (ret) { 766 dev_err(&pdev->dev, 767 "%s(): failed to register video device\n", __func__); 768 goto err_m2m_release; 769 } 770 771 pr_debug("gsc m2m driver registered as /dev/video%d", gsc->vdev.num); 772 return 0; 773 774 err_m2m_release: 775 v4l2_m2m_release(gsc->m2m.m2m_dev); 776 777 return ret; 778 } 779 780 void gsc_unregister_m2m_device(struct gsc_dev *gsc) 781 { 782 if (gsc) { 783 v4l2_m2m_release(gsc->m2m.m2m_dev); 784 video_unregister_device(&gsc->vdev); 785 } 786 } 787