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 27static 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 45static 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 56static 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 63static 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 78static 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 89void 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 115static void gsc_m2m_job_abort(void *priv) 116{ 117 __gsc_m2m_job_abort((struct gsc_ctx *)priv); 118} 119 120static 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 144static 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 220put_device: 221 ctx->state &= ~GSC_PARAMS; 222 spin_unlock_irqrestore(&gsc->slock, flags); 223} 224 225static 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 246static 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 264static 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 275static 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 .wait_prepare = vb2_ops_wait_prepare, 280 .wait_finish = vb2_ops_wait_finish, 281 .stop_streaming = gsc_m2m_stop_streaming, 282 .start_streaming = gsc_m2m_start_streaming, 283}; 284 285static int gsc_m2m_querycap(struct file *file, void *fh, 286 struct v4l2_capability *cap) 287{ 288 strscpy(cap->driver, GSC_MODULE_NAME, sizeof(cap->driver)); 289 strscpy(cap->card, GSC_MODULE_NAME " gscaler", sizeof(cap->card)); 290 return 0; 291} 292 293static int gsc_m2m_enum_fmt(struct file *file, void *priv, 294 struct v4l2_fmtdesc *f) 295{ 296 return gsc_enum_fmt(f); 297} 298 299static int gsc_m2m_g_fmt_mplane(struct file *file, void *fh, 300 struct v4l2_format *f) 301{ 302 struct gsc_ctx *ctx = fh_to_ctx(fh); 303 304 return gsc_g_fmt_mplane(ctx, f); 305} 306 307static int gsc_m2m_try_fmt_mplane(struct file *file, void *fh, 308 struct v4l2_format *f) 309{ 310 struct gsc_ctx *ctx = fh_to_ctx(fh); 311 312 return gsc_try_fmt_mplane(ctx, f); 313} 314 315static int gsc_m2m_s_fmt_mplane(struct file *file, void *fh, 316 struct v4l2_format *f) 317{ 318 struct gsc_ctx *ctx = fh_to_ctx(fh); 319 struct vb2_queue *vq; 320 struct gsc_frame *frame; 321 struct v4l2_pix_format_mplane *pix; 322 int i, ret = 0; 323 324 ret = gsc_m2m_try_fmt_mplane(file, fh, f); 325 if (ret) 326 return ret; 327 328 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); 329 330 if (vb2_is_streaming(vq)) { 331 pr_err("queue (%d) busy", f->type); 332 return -EBUSY; 333 } 334 335 if (V4L2_TYPE_IS_OUTPUT(f->type)) 336 frame = &ctx->s_frame; 337 else 338 frame = &ctx->d_frame; 339 340 pix = &f->fmt.pix_mp; 341 frame->fmt = find_fmt(&pix->pixelformat, NULL, 0); 342 frame->colorspace = pix->colorspace; 343 if (!frame->fmt) 344 return -EINVAL; 345 346 for (i = 0; i < frame->fmt->num_planes; i++) 347 frame->payload[i] = pix->plane_fmt[i].sizeimage; 348 349 gsc_set_frame_size(frame, pix->width, pix->height); 350 351 if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 352 gsc_ctx_state_lock_set(GSC_PARAMS | GSC_DST_FMT, ctx); 353 else 354 gsc_ctx_state_lock_set(GSC_PARAMS | GSC_SRC_FMT, ctx); 355 356 pr_debug("f_w: %d, f_h: %d", frame->f_width, frame->f_height); 357 358 return 0; 359} 360 361static int gsc_m2m_reqbufs(struct file *file, void *fh, 362 struct v4l2_requestbuffers *reqbufs) 363{ 364 struct gsc_ctx *ctx = fh_to_ctx(fh); 365 struct gsc_dev *gsc = ctx->gsc_dev; 366 u32 max_cnt; 367 368 max_cnt = (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ? 369 gsc->variant->in_buf_cnt : gsc->variant->out_buf_cnt; 370 if (reqbufs->count > max_cnt) 371 return -EINVAL; 372 373 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs); 374} 375 376static int gsc_m2m_expbuf(struct file *file, void *fh, 377 struct v4l2_exportbuffer *eb) 378{ 379 struct gsc_ctx *ctx = fh_to_ctx(fh); 380 return v4l2_m2m_expbuf(file, ctx->m2m_ctx, eb); 381} 382 383static int gsc_m2m_querybuf(struct file *file, void *fh, 384 struct v4l2_buffer *buf) 385{ 386 struct gsc_ctx *ctx = fh_to_ctx(fh); 387 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf); 388} 389 390static int gsc_m2m_qbuf(struct file *file, void *fh, 391 struct v4l2_buffer *buf) 392{ 393 struct gsc_ctx *ctx = fh_to_ctx(fh); 394 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf); 395} 396 397static int gsc_m2m_dqbuf(struct file *file, void *fh, 398 struct v4l2_buffer *buf) 399{ 400 struct gsc_ctx *ctx = fh_to_ctx(fh); 401 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf); 402} 403 404static int gsc_m2m_streamon(struct file *file, void *fh, 405 enum v4l2_buf_type type) 406{ 407 struct gsc_ctx *ctx = fh_to_ctx(fh); 408 409 /* The source and target color format need to be set */ 410 if (V4L2_TYPE_IS_OUTPUT(type)) { 411 if (!gsc_ctx_state_is_set(GSC_SRC_FMT, ctx)) 412 return -EINVAL; 413 } else if (!gsc_ctx_state_is_set(GSC_DST_FMT, ctx)) { 414 return -EINVAL; 415 } 416 417 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type); 418} 419 420static int gsc_m2m_streamoff(struct file *file, void *fh, 421 enum v4l2_buf_type type) 422{ 423 struct gsc_ctx *ctx = fh_to_ctx(fh); 424 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type); 425} 426 427/* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */ 428static int is_rectangle_enclosed(struct v4l2_rect *a, struct v4l2_rect *b) 429{ 430 if (a->left < b->left || a->top < b->top) 431 return 0; 432 433 if (a->left + a->width > b->left + b->width) 434 return 0; 435 436 if (a->top + a->height > b->top + b->height) 437 return 0; 438 439 return 1; 440} 441 442static int gsc_m2m_g_selection(struct file *file, void *fh, 443 struct v4l2_selection *s) 444{ 445 struct gsc_frame *frame; 446 struct gsc_ctx *ctx = fh_to_ctx(fh); 447 448 if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) && 449 (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)) 450 return -EINVAL; 451 452 frame = ctx_get_frame(ctx, s->type); 453 if (IS_ERR(frame)) 454 return PTR_ERR(frame); 455 456 switch (s->target) { 457 case V4L2_SEL_TGT_COMPOSE_DEFAULT: 458 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 459 case V4L2_SEL_TGT_CROP_BOUNDS: 460 case V4L2_SEL_TGT_CROP_DEFAULT: 461 s->r.left = 0; 462 s->r.top = 0; 463 s->r.width = frame->f_width; 464 s->r.height = frame->f_height; 465 return 0; 466 467 case V4L2_SEL_TGT_COMPOSE: 468 case V4L2_SEL_TGT_CROP: 469 s->r.left = frame->crop.left; 470 s->r.top = frame->crop.top; 471 s->r.width = frame->crop.width; 472 s->r.height = frame->crop.height; 473 return 0; 474 } 475 476 return -EINVAL; 477} 478 479static int gsc_m2m_s_selection(struct file *file, void *fh, 480 struct v4l2_selection *s) 481{ 482 struct gsc_frame *frame; 483 struct gsc_ctx *ctx = fh_to_ctx(fh); 484 struct gsc_variant *variant = ctx->gsc_dev->variant; 485 struct v4l2_selection sel = *s; 486 int ret; 487 488 if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) && 489 (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)) 490 return -EINVAL; 491 492 ret = gsc_try_selection(ctx, &sel); 493 if (ret) 494 return ret; 495 496 if (s->flags & V4L2_SEL_FLAG_LE && 497 !is_rectangle_enclosed(&sel.r, &s->r)) 498 return -ERANGE; 499 500 if (s->flags & V4L2_SEL_FLAG_GE && 501 !is_rectangle_enclosed(&s->r, &sel.r)) 502 return -ERANGE; 503 504 s->r = sel.r; 505 506 switch (s->target) { 507 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 508 case V4L2_SEL_TGT_COMPOSE_DEFAULT: 509 case V4L2_SEL_TGT_COMPOSE: 510 frame = &ctx->s_frame; 511 break; 512 513 case V4L2_SEL_TGT_CROP_BOUNDS: 514 case V4L2_SEL_TGT_CROP: 515 case V4L2_SEL_TGT_CROP_DEFAULT: 516 frame = &ctx->d_frame; 517 break; 518 519 default: 520 return -EINVAL; 521 } 522 523 /* Check to see if scaling ratio is within supported range */ 524 if (gsc_ctx_state_is_set(GSC_DST_FMT | GSC_SRC_FMT, ctx)) { 525 if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 526 ret = gsc_check_scaler_ratio(variant, sel.r.width, 527 sel.r.height, ctx->d_frame.crop.width, 528 ctx->d_frame.crop.height, 529 ctx->gsc_ctrls.rotate->val, ctx->out_path); 530 } else { 531 ret = gsc_check_scaler_ratio(variant, 532 ctx->s_frame.crop.width, 533 ctx->s_frame.crop.height, sel.r.width, 534 sel.r.height, ctx->gsc_ctrls.rotate->val, 535 ctx->out_path); 536 } 537 538 if (ret) { 539 pr_err("Out of scaler range"); 540 return -EINVAL; 541 } 542 } 543 544 frame->crop = sel.r; 545 546 gsc_ctx_state_lock_set(GSC_PARAMS, ctx); 547 return 0; 548} 549 550static const struct v4l2_ioctl_ops gsc_m2m_ioctl_ops = { 551 .vidioc_querycap = gsc_m2m_querycap, 552 .vidioc_enum_fmt_vid_cap = gsc_m2m_enum_fmt, 553 .vidioc_enum_fmt_vid_out = gsc_m2m_enum_fmt, 554 .vidioc_g_fmt_vid_cap_mplane = gsc_m2m_g_fmt_mplane, 555 .vidioc_g_fmt_vid_out_mplane = gsc_m2m_g_fmt_mplane, 556 .vidioc_try_fmt_vid_cap_mplane = gsc_m2m_try_fmt_mplane, 557 .vidioc_try_fmt_vid_out_mplane = gsc_m2m_try_fmt_mplane, 558 .vidioc_s_fmt_vid_cap_mplane = gsc_m2m_s_fmt_mplane, 559 .vidioc_s_fmt_vid_out_mplane = gsc_m2m_s_fmt_mplane, 560 .vidioc_reqbufs = gsc_m2m_reqbufs, 561 .vidioc_expbuf = gsc_m2m_expbuf, 562 .vidioc_querybuf = gsc_m2m_querybuf, 563 .vidioc_qbuf = gsc_m2m_qbuf, 564 .vidioc_dqbuf = gsc_m2m_dqbuf, 565 .vidioc_streamon = gsc_m2m_streamon, 566 .vidioc_streamoff = gsc_m2m_streamoff, 567 .vidioc_g_selection = gsc_m2m_g_selection, 568 .vidioc_s_selection = gsc_m2m_s_selection 569}; 570 571static int queue_init(void *priv, struct vb2_queue *src_vq, 572 struct vb2_queue *dst_vq) 573{ 574 struct gsc_ctx *ctx = priv; 575 int ret; 576 577 memset(src_vq, 0, sizeof(*src_vq)); 578 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; 579 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF; 580 src_vq->drv_priv = ctx; 581 src_vq->ops = &gsc_m2m_qops; 582 src_vq->mem_ops = &vb2_dma_contig_memops; 583 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); 584 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; 585 src_vq->lock = &ctx->gsc_dev->lock; 586 src_vq->dev = &ctx->gsc_dev->pdev->dev; 587 588 ret = vb2_queue_init(src_vq); 589 if (ret) 590 return ret; 591 592 memset(dst_vq, 0, sizeof(*dst_vq)); 593 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; 594 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF; 595 dst_vq->drv_priv = ctx; 596 dst_vq->ops = &gsc_m2m_qops; 597 dst_vq->mem_ops = &vb2_dma_contig_memops; 598 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); 599 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; 600 dst_vq->lock = &ctx->gsc_dev->lock; 601 dst_vq->dev = &ctx->gsc_dev->pdev->dev; 602 603 return vb2_queue_init(dst_vq); 604} 605 606static int gsc_m2m_open(struct file *file) 607{ 608 struct gsc_dev *gsc = video_drvdata(file); 609 struct gsc_ctx *ctx = NULL; 610 int ret; 611 612 pr_debug("pid: %d, state: 0x%lx", task_pid_nr(current), gsc->state); 613 614 if (mutex_lock_interruptible(&gsc->lock)) 615 return -ERESTARTSYS; 616 617 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 618 if (!ctx) { 619 ret = -ENOMEM; 620 goto unlock; 621 } 622 623 v4l2_fh_init(&ctx->fh, gsc->m2m.vfd); 624 ret = gsc_ctrls_create(ctx); 625 if (ret) 626 goto error_fh; 627 628 /* Use separate control handler per file handle */ 629 ctx->fh.ctrl_handler = &ctx->ctrl_handler; 630 file->private_data = &ctx->fh; 631 v4l2_fh_add(&ctx->fh); 632 633 ctx->gsc_dev = gsc; 634 /* Default color format */ 635 ctx->s_frame.fmt = get_format(0); 636 ctx->d_frame.fmt = get_format(0); 637 /* Setup the device context for mem2mem mode. */ 638 ctx->state = GSC_CTX_M2M; 639 ctx->flags = 0; 640 ctx->in_path = GSC_DMA; 641 ctx->out_path = GSC_DMA; 642 643 ctx->m2m_ctx = v4l2_m2m_ctx_init(gsc->m2m.m2m_dev, ctx, queue_init); 644 if (IS_ERR(ctx->m2m_ctx)) { 645 pr_err("Failed to initialize m2m context"); 646 ret = PTR_ERR(ctx->m2m_ctx); 647 goto error_ctrls; 648 } 649 650 if (gsc->m2m.refcnt++ == 0) 651 set_bit(ST_M2M_OPEN, &gsc->state); 652 653 pr_debug("gsc m2m driver is opened, ctx(0x%p)", ctx); 654 655 mutex_unlock(&gsc->lock); 656 return 0; 657 658error_ctrls: 659 gsc_ctrls_delete(ctx); 660 v4l2_fh_del(&ctx->fh); 661error_fh: 662 v4l2_fh_exit(&ctx->fh); 663 kfree(ctx); 664unlock: 665 mutex_unlock(&gsc->lock); 666 return ret; 667} 668 669static int gsc_m2m_release(struct file *file) 670{ 671 struct gsc_ctx *ctx = fh_to_ctx(file->private_data); 672 struct gsc_dev *gsc = ctx->gsc_dev; 673 674 pr_debug("pid: %d, state: 0x%lx, refcnt= %d", 675 task_pid_nr(current), gsc->state, gsc->m2m.refcnt); 676 677 mutex_lock(&gsc->lock); 678 679 v4l2_m2m_ctx_release(ctx->m2m_ctx); 680 gsc_ctrls_delete(ctx); 681 v4l2_fh_del(&ctx->fh); 682 v4l2_fh_exit(&ctx->fh); 683 684 if (--gsc->m2m.refcnt <= 0) 685 clear_bit(ST_M2M_OPEN, &gsc->state); 686 kfree(ctx); 687 688 mutex_unlock(&gsc->lock); 689 return 0; 690} 691 692static __poll_t gsc_m2m_poll(struct file *file, 693 struct poll_table_struct *wait) 694{ 695 struct gsc_ctx *ctx = fh_to_ctx(file->private_data); 696 struct gsc_dev *gsc = ctx->gsc_dev; 697 __poll_t ret; 698 699 if (mutex_lock_interruptible(&gsc->lock)) 700 return EPOLLERR; 701 702 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait); 703 mutex_unlock(&gsc->lock); 704 705 return ret; 706} 707 708static int gsc_m2m_mmap(struct file *file, struct vm_area_struct *vma) 709{ 710 struct gsc_ctx *ctx = fh_to_ctx(file->private_data); 711 struct gsc_dev *gsc = ctx->gsc_dev; 712 int ret; 713 714 if (mutex_lock_interruptible(&gsc->lock)) 715 return -ERESTARTSYS; 716 717 ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); 718 mutex_unlock(&gsc->lock); 719 720 return ret; 721} 722 723static const struct v4l2_file_operations gsc_m2m_fops = { 724 .owner = THIS_MODULE, 725 .open = gsc_m2m_open, 726 .release = gsc_m2m_release, 727 .poll = gsc_m2m_poll, 728 .unlocked_ioctl = video_ioctl2, 729 .mmap = gsc_m2m_mmap, 730}; 731 732static const struct v4l2_m2m_ops gsc_m2m_ops = { 733 .device_run = gsc_m2m_device_run, 734 .job_abort = gsc_m2m_job_abort, 735}; 736 737int gsc_register_m2m_device(struct gsc_dev *gsc) 738{ 739 struct platform_device *pdev; 740 int ret; 741 742 if (!gsc) 743 return -ENODEV; 744 745 pdev = gsc->pdev; 746 747 gsc->vdev.fops = &gsc_m2m_fops; 748 gsc->vdev.ioctl_ops = &gsc_m2m_ioctl_ops; 749 gsc->vdev.release = video_device_release_empty; 750 gsc->vdev.lock = &gsc->lock; 751 gsc->vdev.vfl_dir = VFL_DIR_M2M; 752 gsc->vdev.v4l2_dev = &gsc->v4l2_dev; 753 gsc->vdev.device_caps = V4L2_CAP_STREAMING | 754 V4L2_CAP_VIDEO_M2M_MPLANE; 755 snprintf(gsc->vdev.name, sizeof(gsc->vdev.name), "%s.%d:m2m", 756 GSC_MODULE_NAME, gsc->id); 757 758 video_set_drvdata(&gsc->vdev, gsc); 759 760 gsc->m2m.vfd = &gsc->vdev; 761 gsc->m2m.m2m_dev = v4l2_m2m_init(&gsc_m2m_ops); 762 if (IS_ERR(gsc->m2m.m2m_dev)) { 763 dev_err(&pdev->dev, "failed to initialize v4l2-m2m device\n"); 764 return PTR_ERR(gsc->m2m.m2m_dev); 765 } 766 767 ret = video_register_device(&gsc->vdev, VFL_TYPE_VIDEO, -1); 768 if (ret) { 769 dev_err(&pdev->dev, 770 "%s(): failed to register video device\n", __func__); 771 goto err_m2m_release; 772 } 773 774 pr_debug("gsc m2m driver registered as /dev/video%d", gsc->vdev.num); 775 return 0; 776 777err_m2m_release: 778 v4l2_m2m_release(gsc->m2m.m2m_dev); 779 780 return ret; 781} 782 783void gsc_unregister_m2m_device(struct gsc_dev *gsc) 784{ 785 if (gsc) { 786 v4l2_m2m_release(gsc->m2m.m2m_dev); 787 video_unregister_device(&gsc->vdev); 788 } 789} 790