1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * ISI V4L2 memory to memory driver for i.MX8QXP/QM platform 4 * 5 * ISI is a Image Sensor Interface of i.MX8QXP/QM platform, which 6 * used to process image from camera sensor or memory to memory or DC 7 * 8 * Copyright (c) 2019 NXP Semiconductor 9 */ 10 11 #include <linux/container_of.h> 12 #include <linux/device.h> 13 #include <linux/errno.h> 14 #include <linux/kernel.h> 15 #include <linux/limits.h> 16 #include <linux/minmax.h> 17 #include <linux/mutex.h> 18 #include <linux/pm_runtime.h> 19 #include <linux/slab.h> 20 #include <linux/spinlock.h> 21 #include <linux/string.h> 22 #include <linux/types.h> 23 #include <linux/videodev2.h> 24 25 #include <media/media-entity.h> 26 #include <media/v4l2-ctrls.h> 27 #include <media/v4l2-device.h> 28 #include <media/v4l2-event.h> 29 #include <media/v4l2-fh.h> 30 #include <media/v4l2-ioctl.h> 31 #include <media/v4l2-mem2mem.h> 32 #include <media/videobuf2-core.h> 33 #include <media/videobuf2-dma-contig.h> 34 35 #include "imx8-isi-core.h" 36 37 struct mxc_isi_m2m_buffer { 38 struct v4l2_m2m_buffer buf; 39 dma_addr_t dma_addrs[3]; 40 }; 41 42 struct mxc_isi_m2m_ctx_queue_data { 43 struct v4l2_pix_format_mplane format; 44 const struct mxc_isi_format_info *info; 45 u32 sequence; 46 }; 47 48 struct mxc_isi_m2m_ctx { 49 struct v4l2_fh fh; 50 struct mxc_isi_m2m *m2m; 51 52 /* Protects the m2m vb2 queues */ 53 struct mutex vb2_lock; 54 55 struct { 56 struct mxc_isi_m2m_ctx_queue_data out; 57 struct mxc_isi_m2m_ctx_queue_data cap; 58 } queues; 59 60 struct { 61 struct v4l2_ctrl_handler handler; 62 unsigned int alpha; 63 bool hflip; 64 bool vflip; 65 } ctrls; 66 67 bool chained; 68 }; 69 70 static inline struct mxc_isi_m2m_buffer * 71 to_isi_m2m_buffer(struct vb2_v4l2_buffer *buf) 72 { 73 return container_of(buf, struct mxc_isi_m2m_buffer, buf.vb); 74 } 75 76 static inline struct mxc_isi_m2m_ctx *to_isi_m2m_ctx(struct v4l2_fh *fh) 77 { 78 return container_of(fh, struct mxc_isi_m2m_ctx, fh); 79 } 80 81 static inline struct mxc_isi_m2m_ctx_queue_data * 82 mxc_isi_m2m_ctx_qdata(struct mxc_isi_m2m_ctx *ctx, enum v4l2_buf_type type) 83 { 84 if (V4L2_TYPE_IS_OUTPUT(type)) 85 return &ctx->queues.out; 86 else 87 return &ctx->queues.cap; 88 } 89 90 /* ----------------------------------------------------------------------------- 91 * V4L2 M2M device operations 92 */ 93 94 static void mxc_isi_m2m_frame_write_done(struct mxc_isi_pipe *pipe, u32 status) 95 { 96 struct mxc_isi_m2m *m2m = &pipe->isi->m2m; 97 struct vb2_v4l2_buffer *src_vbuf, *dst_vbuf; 98 struct mxc_isi_m2m_ctx *ctx; 99 100 ctx = v4l2_m2m_get_curr_priv(m2m->m2m_dev); 101 if (!ctx) { 102 dev_err(m2m->isi->dev, 103 "Instance released before the end of transaction\n"); 104 return; 105 } 106 107 src_vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx); 108 dst_vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx); 109 110 v4l2_m2m_buf_copy_metadata(src_vbuf, dst_vbuf, false); 111 112 src_vbuf->sequence = ctx->queues.out.sequence++; 113 dst_vbuf->sequence = ctx->queues.cap.sequence++; 114 115 v4l2_m2m_buf_done(src_vbuf, VB2_BUF_STATE_DONE); 116 v4l2_m2m_buf_done(dst_vbuf, VB2_BUF_STATE_DONE); 117 118 v4l2_m2m_job_finish(m2m->m2m_dev, ctx->fh.m2m_ctx); 119 } 120 121 static void mxc_isi_m2m_device_run(void *priv) 122 { 123 struct mxc_isi_m2m_ctx *ctx = priv; 124 struct mxc_isi_m2m *m2m = ctx->m2m; 125 struct vb2_v4l2_buffer *src_vbuf, *dst_vbuf; 126 struct mxc_isi_m2m_buffer *src_buf, *dst_buf; 127 128 mxc_isi_channel_disable(m2m->pipe); 129 130 mutex_lock(&m2m->lock); 131 132 /* If the context has changed, reconfigure the channel. */ 133 if (m2m->last_ctx != ctx) { 134 const struct v4l2_area in_size = { 135 .width = ctx->queues.out.format.width, 136 .height = ctx->queues.out.format.height, 137 }; 138 const struct v4l2_area scale = { 139 .width = ctx->queues.cap.format.width, 140 .height = ctx->queues.cap.format.height, 141 }; 142 const struct v4l2_rect crop = { 143 .width = ctx->queues.cap.format.width, 144 .height = ctx->queues.cap.format.height, 145 }; 146 147 mxc_isi_channel_config(m2m->pipe, MXC_ISI_INPUT_MEM, 148 &in_size, &scale, &crop, 149 ctx->queues.out.info->encoding, 150 ctx->queues.cap.info->encoding); 151 mxc_isi_channel_set_input_format(m2m->pipe, 152 ctx->queues.out.info, 153 &ctx->queues.out.format); 154 mxc_isi_channel_set_output_format(m2m->pipe, 155 ctx->queues.cap.info, 156 &ctx->queues.cap.format); 157 158 m2m->last_ctx = ctx; 159 } 160 161 mutex_unlock(&m2m->lock); 162 163 mutex_lock(ctx->ctrls.handler.lock); 164 mxc_isi_channel_set_alpha(m2m->pipe, ctx->ctrls.alpha); 165 mxc_isi_channel_set_flip(m2m->pipe, ctx->ctrls.hflip, ctx->ctrls.vflip); 166 mutex_unlock(ctx->ctrls.handler.lock); 167 168 src_vbuf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx); 169 dst_vbuf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx); 170 171 src_buf = to_isi_m2m_buffer(src_vbuf); 172 dst_buf = to_isi_m2m_buffer(dst_vbuf); 173 174 mxc_isi_channel_set_inbuf(m2m->pipe, src_buf->dma_addrs[0]); 175 mxc_isi_channel_set_outbuf(m2m->pipe, dst_buf->dma_addrs, MXC_ISI_BUF1); 176 mxc_isi_channel_set_outbuf(m2m->pipe, dst_buf->dma_addrs, MXC_ISI_BUF2); 177 178 mxc_isi_channel_enable(m2m->pipe); 179 180 mxc_isi_channel_m2m_start(m2m->pipe); 181 } 182 183 static const struct v4l2_m2m_ops mxc_isi_m2m_ops = { 184 .device_run = mxc_isi_m2m_device_run, 185 }; 186 187 /* ----------------------------------------------------------------------------- 188 * videobuf2 queue operations 189 */ 190 191 static int mxc_isi_m2m_vb2_queue_setup(struct vb2_queue *q, 192 unsigned int *num_buffers, 193 unsigned int *num_planes, 194 unsigned int sizes[], 195 struct device *alloc_devs[]) 196 { 197 struct mxc_isi_m2m_ctx *ctx = vb2_get_drv_priv(q); 198 const struct mxc_isi_m2m_ctx_queue_data *qdata = 199 mxc_isi_m2m_ctx_qdata(ctx, q->type); 200 201 return mxc_isi_video_queue_setup(&qdata->format, qdata->info, 202 num_buffers, num_planes, sizes); 203 } 204 205 static int mxc_isi_m2m_vb2_buffer_init(struct vb2_buffer *vb2) 206 { 207 struct vb2_queue *vq = vb2->vb2_queue; 208 struct mxc_isi_m2m_buffer *buf = to_isi_m2m_buffer(to_vb2_v4l2_buffer(vb2)); 209 struct mxc_isi_m2m_ctx *ctx = vb2_get_drv_priv(vb2->vb2_queue); 210 const struct mxc_isi_m2m_ctx_queue_data *qdata = 211 mxc_isi_m2m_ctx_qdata(ctx, vq->type); 212 213 mxc_isi_video_buffer_init(vb2, buf->dma_addrs, qdata->info, 214 &qdata->format); 215 216 return 0; 217 } 218 219 static int mxc_isi_m2m_vb2_buffer_prepare(struct vb2_buffer *vb2) 220 { 221 struct vb2_queue *vq = vb2->vb2_queue; 222 struct mxc_isi_m2m_ctx *ctx = vb2_get_drv_priv(vq); 223 const struct mxc_isi_m2m_ctx_queue_data *qdata = 224 mxc_isi_m2m_ctx_qdata(ctx, vq->type); 225 226 return mxc_isi_video_buffer_prepare(ctx->m2m->isi, vb2, qdata->info, 227 &qdata->format); 228 } 229 230 static void mxc_isi_m2m_vb2_buffer_queue(struct vb2_buffer *vb2) 231 { 232 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb2); 233 struct mxc_isi_m2m_ctx *ctx = vb2_get_drv_priv(vb2->vb2_queue); 234 235 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf); 236 } 237 238 static int mxc_isi_m2m_vb2_start_streaming(struct vb2_queue *q, 239 unsigned int count) 240 { 241 struct mxc_isi_m2m_ctx *ctx = vb2_get_drv_priv(q); 242 struct mxc_isi_m2m_ctx_queue_data *qdata = 243 mxc_isi_m2m_ctx_qdata(ctx, q->type); 244 245 qdata->sequence = 0; 246 247 return 0; 248 } 249 250 static void mxc_isi_m2m_vb2_stop_streaming(struct vb2_queue *q) 251 { 252 struct mxc_isi_m2m_ctx *ctx = vb2_get_drv_priv(q); 253 struct vb2_v4l2_buffer *vbuf; 254 255 for (;;) { 256 if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 257 vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx); 258 else 259 vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx); 260 if (!vbuf) 261 break; 262 263 v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR); 264 } 265 } 266 267 static const struct vb2_ops mxc_isi_m2m_vb2_qops = { 268 .queue_setup = mxc_isi_m2m_vb2_queue_setup, 269 .buf_init = mxc_isi_m2m_vb2_buffer_init, 270 .buf_prepare = mxc_isi_m2m_vb2_buffer_prepare, 271 .buf_queue = mxc_isi_m2m_vb2_buffer_queue, 272 .start_streaming = mxc_isi_m2m_vb2_start_streaming, 273 .stop_streaming = mxc_isi_m2m_vb2_stop_streaming, 274 }; 275 276 static int mxc_isi_m2m_queue_init(void *priv, struct vb2_queue *src_vq, 277 struct vb2_queue *dst_vq) 278 { 279 struct mxc_isi_m2m_ctx *ctx = priv; 280 struct mxc_isi_m2m *m2m = ctx->m2m; 281 int ret; 282 283 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; 284 src_vq->io_modes = VB2_MMAP | VB2_DMABUF; 285 src_vq->drv_priv = ctx; 286 src_vq->buf_struct_size = sizeof(struct mxc_isi_m2m_buffer); 287 src_vq->ops = &mxc_isi_m2m_vb2_qops; 288 src_vq->mem_ops = &vb2_dma_contig_memops; 289 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; 290 src_vq->lock = &ctx->vb2_lock; 291 src_vq->dev = m2m->isi->dev; 292 293 ret = vb2_queue_init(src_vq); 294 if (ret) 295 return ret; 296 297 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; 298 dst_vq->io_modes = VB2_MMAP | VB2_DMABUF; 299 dst_vq->drv_priv = ctx; 300 dst_vq->buf_struct_size = sizeof(struct mxc_isi_m2m_buffer); 301 dst_vq->ops = &mxc_isi_m2m_vb2_qops; 302 dst_vq->mem_ops = &vb2_dma_contig_memops; 303 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; 304 dst_vq->lock = &ctx->vb2_lock; 305 dst_vq->dev = m2m->isi->dev; 306 307 return vb2_queue_init(dst_vq); 308 } 309 310 /* ----------------------------------------------------------------------------- 311 * V4L2 controls 312 */ 313 314 static inline struct mxc_isi_m2m_ctx * 315 ctrl_to_mxc_isi_m2m_ctx(struct v4l2_ctrl *ctrl) 316 { 317 return container_of(ctrl->handler, struct mxc_isi_m2m_ctx, ctrls.handler); 318 } 319 320 static int mxc_isi_m2m_ctx_s_ctrl(struct v4l2_ctrl *ctrl) 321 { 322 struct mxc_isi_m2m_ctx *ctx = ctrl_to_mxc_isi_m2m_ctx(ctrl); 323 324 switch (ctrl->id) { 325 case V4L2_CID_HFLIP: 326 ctx->ctrls.hflip = ctrl->val; 327 break; 328 329 case V4L2_CID_VFLIP: 330 ctx->ctrls.vflip = ctrl->val; 331 break; 332 333 case V4L2_CID_ALPHA_COMPONENT: 334 ctx->ctrls.alpha = ctrl->val; 335 break; 336 } 337 338 return 0; 339 } 340 341 static const struct v4l2_ctrl_ops mxc_isi_m2m_ctx_ctrl_ops = { 342 .s_ctrl = mxc_isi_m2m_ctx_s_ctrl, 343 }; 344 345 static int mxc_isi_m2m_ctx_ctrls_create(struct mxc_isi_m2m_ctx *ctx) 346 { 347 struct v4l2_ctrl_handler *handler = &ctx->ctrls.handler; 348 int ret; 349 350 v4l2_ctrl_handler_init(handler, 3); 351 352 v4l2_ctrl_new_std(handler, &mxc_isi_m2m_ctx_ctrl_ops, 353 V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 0); 354 v4l2_ctrl_new_std(handler, &mxc_isi_m2m_ctx_ctrl_ops, 355 V4L2_CID_HFLIP, 0, 1, 1, 0); 356 v4l2_ctrl_new_std(handler, &mxc_isi_m2m_ctx_ctrl_ops, 357 V4L2_CID_VFLIP, 0, 1, 1, 0); 358 359 if (handler->error) { 360 ret = handler->error; 361 v4l2_ctrl_handler_free(handler); 362 return ret; 363 } 364 365 ctx->fh.ctrl_handler = handler; 366 367 return 0; 368 } 369 370 static void mxc_isi_m2m_ctx_ctrls_delete(struct mxc_isi_m2m_ctx *ctx) 371 { 372 v4l2_ctrl_handler_free(&ctx->ctrls.handler); 373 } 374 375 /* ----------------------------------------------------------------------------- 376 * V4L2 ioctls 377 */ 378 379 static int mxc_isi_m2m_querycap(struct file *file, void *fh, 380 struct v4l2_capability *cap) 381 { 382 strscpy(cap->driver, MXC_ISI_DRIVER_NAME, sizeof(cap->driver)); 383 strscpy(cap->card, MXC_ISI_M2M, sizeof(cap->card)); 384 cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE; 385 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; 386 387 return 0; 388 } 389 390 static int mxc_isi_m2m_enum_fmt_vid(struct file *file, void *fh, 391 struct v4l2_fmtdesc *f) 392 { 393 const enum mxc_isi_video_type type = 394 f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE ? 395 MXC_ISI_VIDEO_M2M_OUT : MXC_ISI_VIDEO_M2M_CAP; 396 const struct mxc_isi_format_info *info; 397 398 info = mxc_isi_format_enum(f->index, type); 399 if (!info) 400 return -EINVAL; 401 402 f->pixelformat = info->fourcc; 403 f->flags |= V4L2_FMT_FLAG_CSC_COLORSPACE | V4L2_FMT_FLAG_CSC_YCBCR_ENC 404 | V4L2_FMT_FLAG_CSC_QUANTIZATION | V4L2_FMT_FLAG_CSC_XFER_FUNC; 405 406 return 0; 407 } 408 409 static const struct mxc_isi_format_info * 410 __mxc_isi_m2m_try_fmt_vid(struct mxc_isi_m2m_ctx *ctx, 411 struct v4l2_pix_format_mplane *pix, 412 const enum mxc_isi_video_type type) 413 { 414 if (type == MXC_ISI_VIDEO_M2M_CAP) { 415 /* Downscaling only */ 416 pix->width = min(pix->width, ctx->queues.out.format.width); 417 pix->height = min(pix->height, ctx->queues.out.format.height); 418 } 419 420 return mxc_isi_format_try(ctx->m2m->pipe, pix, type); 421 } 422 423 static int mxc_isi_m2m_try_fmt_vid(struct file *file, void *fh, 424 struct v4l2_format *f) 425 { 426 const enum mxc_isi_video_type type = 427 f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE ? 428 MXC_ISI_VIDEO_M2M_OUT : MXC_ISI_VIDEO_M2M_CAP; 429 struct mxc_isi_m2m_ctx *ctx = to_isi_m2m_ctx(fh); 430 431 __mxc_isi_m2m_try_fmt_vid(ctx, &f->fmt.pix_mp, type); 432 433 return 0; 434 } 435 436 static int mxc_isi_m2m_g_fmt_vid(struct file *file, void *fh, 437 struct v4l2_format *f) 438 { 439 struct mxc_isi_m2m_ctx *ctx = to_isi_m2m_ctx(fh); 440 const struct mxc_isi_m2m_ctx_queue_data *qdata = 441 mxc_isi_m2m_ctx_qdata(ctx, f->type); 442 443 f->fmt.pix_mp = qdata->format; 444 445 return 0; 446 } 447 448 static int mxc_isi_m2m_s_fmt_vid(struct file *file, void *fh, 449 struct v4l2_format *f) 450 { 451 const enum mxc_isi_video_type type = 452 f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE ? 453 MXC_ISI_VIDEO_M2M_OUT : MXC_ISI_VIDEO_M2M_CAP; 454 struct mxc_isi_m2m_ctx *ctx = to_isi_m2m_ctx(fh); 455 struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp; 456 const struct mxc_isi_format_info *info; 457 struct vb2_queue *vq; 458 459 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type); 460 if (!vq) 461 return -EINVAL; 462 463 if (vb2_is_busy(vq)) 464 return -EBUSY; 465 466 info = __mxc_isi_m2m_try_fmt_vid(ctx, pix, type); 467 468 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 469 ctx->queues.out.format = *pix; 470 ctx->queues.out.info = info; 471 } 472 473 /* 474 * Always set the format on the capture side, due to either format 475 * propagation or direct setting. 476 */ 477 ctx->queues.cap.format = *pix; 478 ctx->queues.cap.info = info; 479 480 return 0; 481 } 482 483 static int mxc_isi_m2m_streamon(struct file *file, void *fh, 484 enum v4l2_buf_type type) 485 { 486 struct mxc_isi_m2m_ctx *ctx = to_isi_m2m_ctx(fh); 487 const struct v4l2_pix_format_mplane *out_pix = &ctx->queues.out.format; 488 const struct v4l2_pix_format_mplane *cap_pix = &ctx->queues.cap.format; 489 const struct mxc_isi_format_info *cap_info = ctx->queues.cap.info; 490 const struct mxc_isi_format_info *out_info = ctx->queues.out.info; 491 struct mxc_isi_m2m *m2m = ctx->m2m; 492 bool bypass; 493 494 int ret; 495 496 mutex_lock(&m2m->lock); 497 498 if (m2m->usage_count == INT_MAX) { 499 ret = -EOVERFLOW; 500 goto unlock; 501 } 502 503 bypass = cap_pix->width == out_pix->width && 504 cap_pix->height == out_pix->height && 505 cap_info->encoding == out_info->encoding; 506 507 /* 508 * Acquire the pipe and initialize the channel with the first user of 509 * the M2M device. 510 */ 511 if (m2m->usage_count == 0) { 512 ret = mxc_isi_channel_acquire(m2m->pipe, 513 &mxc_isi_m2m_frame_write_done, 514 bypass); 515 if (ret) 516 goto unlock; 517 518 mxc_isi_channel_get(m2m->pipe); 519 } 520 521 m2m->usage_count++; 522 523 /* 524 * Allocate resources for the channel, counting how many users require 525 * buffer chaining. 526 */ 527 if (!ctx->chained && out_pix->width > MXC_ISI_MAX_WIDTH_UNCHAINED) { 528 ret = mxc_isi_channel_chain(m2m->pipe, bypass); 529 if (ret) 530 goto deinit; 531 532 m2m->chained_count++; 533 ctx->chained = true; 534 } 535 536 /* 537 * Drop the lock to start the stream, as the .device_run() operation 538 * needs to acquire it. 539 */ 540 mutex_unlock(&m2m->lock); 541 ret = v4l2_m2m_ioctl_streamon(file, fh, type); 542 if (ret) { 543 /* Reacquire the lock for the cleanup path. */ 544 mutex_lock(&m2m->lock); 545 goto unchain; 546 } 547 548 return 0; 549 550 unchain: 551 if (ctx->chained && --m2m->chained_count == 0) 552 mxc_isi_channel_unchain(m2m->pipe); 553 ctx->chained = false; 554 555 deinit: 556 if (--m2m->usage_count == 0) { 557 mxc_isi_channel_put(m2m->pipe); 558 mxc_isi_channel_release(m2m->pipe); 559 } 560 561 unlock: 562 mutex_unlock(&m2m->lock); 563 return ret; 564 } 565 566 static int mxc_isi_m2m_streamoff(struct file *file, void *fh, 567 enum v4l2_buf_type type) 568 { 569 struct mxc_isi_m2m_ctx *ctx = to_isi_m2m_ctx(fh); 570 struct mxc_isi_m2m *m2m = ctx->m2m; 571 572 v4l2_m2m_ioctl_streamoff(file, fh, type); 573 574 mutex_lock(&m2m->lock); 575 576 /* 577 * If the last context is this one, reset it to make sure the device 578 * will be reconfigured when streaming is restarted. 579 */ 580 if (m2m->last_ctx == ctx) 581 m2m->last_ctx = NULL; 582 583 /* Free the channel resources if this is the last chained context. */ 584 if (ctx->chained && --m2m->chained_count == 0) 585 mxc_isi_channel_unchain(m2m->pipe); 586 ctx->chained = false; 587 588 /* Turn off the light with the last user. */ 589 if (--m2m->usage_count == 0) { 590 mxc_isi_channel_disable(m2m->pipe); 591 mxc_isi_channel_put(m2m->pipe); 592 mxc_isi_channel_release(m2m->pipe); 593 } 594 595 WARN_ON(m2m->usage_count < 0); 596 597 mutex_unlock(&m2m->lock); 598 599 return 0; 600 } 601 602 static const struct v4l2_ioctl_ops mxc_isi_m2m_ioctl_ops = { 603 .vidioc_querycap = mxc_isi_m2m_querycap, 604 605 .vidioc_enum_fmt_vid_cap = mxc_isi_m2m_enum_fmt_vid, 606 .vidioc_enum_fmt_vid_out = mxc_isi_m2m_enum_fmt_vid, 607 .vidioc_g_fmt_vid_cap_mplane = mxc_isi_m2m_g_fmt_vid, 608 .vidioc_g_fmt_vid_out_mplane = mxc_isi_m2m_g_fmt_vid, 609 .vidioc_s_fmt_vid_cap_mplane = mxc_isi_m2m_s_fmt_vid, 610 .vidioc_s_fmt_vid_out_mplane = mxc_isi_m2m_s_fmt_vid, 611 .vidioc_try_fmt_vid_cap_mplane = mxc_isi_m2m_try_fmt_vid, 612 .vidioc_try_fmt_vid_out_mplane = mxc_isi_m2m_try_fmt_vid, 613 614 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs, 615 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf, 616 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf, 617 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf, 618 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf, 619 .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf, 620 .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs, 621 622 .vidioc_streamon = mxc_isi_m2m_streamon, 623 .vidioc_streamoff = mxc_isi_m2m_streamoff, 624 625 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 626 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 627 }; 628 629 /* ----------------------------------------------------------------------------- 630 * Video device file operations 631 */ 632 633 static void mxc_isi_m2m_init_format(struct mxc_isi_m2m_ctx *ctx, 634 struct mxc_isi_m2m_ctx_queue_data *qdata, 635 enum mxc_isi_video_type type) 636 { 637 qdata->format.width = MXC_ISI_DEF_WIDTH; 638 qdata->format.height = MXC_ISI_DEF_HEIGHT; 639 qdata->format.pixelformat = MXC_ISI_DEF_PIXEL_FORMAT; 640 641 qdata->info = mxc_isi_format_try(ctx->m2m->pipe, &qdata->format, type); 642 } 643 644 static int mxc_isi_m2m_open(struct file *file) 645 { 646 struct video_device *vdev = video_devdata(file); 647 struct mxc_isi_m2m *m2m = video_drvdata(file); 648 struct mxc_isi_m2m_ctx *ctx; 649 int ret; 650 651 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 652 if (!ctx) 653 return -ENOMEM; 654 655 ctx->m2m = m2m; 656 mutex_init(&ctx->vb2_lock); 657 658 v4l2_fh_init(&ctx->fh, vdev); 659 file->private_data = &ctx->fh; 660 661 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(m2m->m2m_dev, ctx, 662 &mxc_isi_m2m_queue_init); 663 if (IS_ERR(ctx->fh.m2m_ctx)) { 664 ret = PTR_ERR(ctx->fh.m2m_ctx); 665 ctx->fh.m2m_ctx = NULL; 666 goto err_fh; 667 } 668 669 mxc_isi_m2m_init_format(ctx, &ctx->queues.out, MXC_ISI_VIDEO_M2M_OUT); 670 mxc_isi_m2m_init_format(ctx, &ctx->queues.cap, MXC_ISI_VIDEO_M2M_CAP); 671 672 ret = mxc_isi_m2m_ctx_ctrls_create(ctx); 673 if (ret) 674 goto err_ctx; 675 676 ret = pm_runtime_resume_and_get(m2m->isi->dev); 677 if (ret) 678 goto err_ctrls; 679 680 v4l2_fh_add(&ctx->fh); 681 682 return 0; 683 684 err_ctrls: 685 mxc_isi_m2m_ctx_ctrls_delete(ctx); 686 err_ctx: 687 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx); 688 err_fh: 689 v4l2_fh_exit(&ctx->fh); 690 mutex_destroy(&ctx->vb2_lock); 691 kfree(ctx); 692 return ret; 693 } 694 695 static int mxc_isi_m2m_release(struct file *file) 696 { 697 struct mxc_isi_m2m *m2m = video_drvdata(file); 698 struct mxc_isi_m2m_ctx *ctx = to_isi_m2m_ctx(file->private_data); 699 700 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx); 701 mxc_isi_m2m_ctx_ctrls_delete(ctx); 702 703 v4l2_fh_del(&ctx->fh); 704 v4l2_fh_exit(&ctx->fh); 705 706 mutex_destroy(&ctx->vb2_lock); 707 kfree(ctx); 708 709 pm_runtime_put(m2m->isi->dev); 710 711 return 0; 712 } 713 714 static const struct v4l2_file_operations mxc_isi_m2m_fops = { 715 .owner = THIS_MODULE, 716 .open = mxc_isi_m2m_open, 717 .release = mxc_isi_m2m_release, 718 .poll = v4l2_m2m_fop_poll, 719 .unlocked_ioctl = video_ioctl2, 720 .mmap = v4l2_m2m_fop_mmap, 721 }; 722 723 /* ----------------------------------------------------------------------------- 724 * Registration 725 */ 726 727 int mxc_isi_m2m_register(struct mxc_isi_dev *isi, struct v4l2_device *v4l2_dev) 728 { 729 struct mxc_isi_m2m *m2m = &isi->m2m; 730 struct video_device *vdev = &m2m->vdev; 731 struct media_link *link; 732 int ret; 733 734 m2m->isi = isi; 735 m2m->pipe = &isi->pipes[0]; 736 737 mutex_init(&m2m->lock); 738 739 /* Initialize the video device and create controls. */ 740 snprintf(vdev->name, sizeof(vdev->name), "mxc_isi.m2m"); 741 742 vdev->fops = &mxc_isi_m2m_fops; 743 vdev->ioctl_ops = &mxc_isi_m2m_ioctl_ops; 744 vdev->v4l2_dev = v4l2_dev; 745 vdev->minor = -1; 746 vdev->release = video_device_release_empty; 747 vdev->vfl_dir = VFL_DIR_M2M; 748 749 vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE; 750 video_set_drvdata(vdev, m2m); 751 752 /* Create the M2M device. */ 753 m2m->m2m_dev = v4l2_m2m_init(&mxc_isi_m2m_ops); 754 if (IS_ERR(m2m->m2m_dev)) { 755 dev_err(isi->dev, "failed to initialize m2m device\n"); 756 ret = PTR_ERR(m2m->m2m_dev); 757 goto err_mutex; 758 } 759 760 /* Register the video device. */ 761 ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1); 762 if (ret < 0) { 763 dev_err(isi->dev, "failed to register m2m device\n"); 764 goto err_m2m; 765 } 766 767 /* 768 * Populate the media graph. We can't use the mem2mem helper 769 * v4l2_m2m_register_media_controller() as the M2M interface needs to 770 * be connected to the existing entities in the graph, so we have to 771 * wire things up manually: 772 * 773 * - The entity in the video_device, which isn't touched by the V4L2 774 * core for M2M devices, is used as the source I/O entity in the 775 * graph, connected to the crossbar switch. 776 * 777 * - The video device at the end of the pipeline provides the sink 778 * entity, and is already wired up in the graph. 779 * 780 * - A new interface is created, pointing at both entities. The sink 781 * entity will thus have two interfaces pointing to it. 782 */ 783 m2m->pad.flags = MEDIA_PAD_FL_SOURCE; 784 vdev->entity.name = "mxc_isi.output"; 785 vdev->entity.function = MEDIA_ENT_F_IO_V4L; 786 ret = media_entity_pads_init(&vdev->entity, 1, &m2m->pad); 787 if (ret) 788 goto err_video; 789 790 ret = media_device_register_entity(v4l2_dev->mdev, &vdev->entity); 791 if (ret) 792 goto err_entity_cleanup; 793 794 ret = media_create_pad_link(&vdev->entity, 0, 795 &m2m->isi->crossbar.sd.entity, 796 m2m->isi->crossbar.num_sinks - 1, 797 MEDIA_LNK_FL_IMMUTABLE | 798 MEDIA_LNK_FL_ENABLED); 799 if (ret) 800 goto err_entity_unreg; 801 802 m2m->intf = media_devnode_create(v4l2_dev->mdev, MEDIA_INTF_T_V4L_VIDEO, 803 0, VIDEO_MAJOR, vdev->minor); 804 if (!m2m->intf) { 805 ret = -ENOMEM; 806 goto err_entity_unreg; 807 } 808 809 link = media_create_intf_link(&vdev->entity, &m2m->intf->intf, 810 MEDIA_LNK_FL_IMMUTABLE | 811 MEDIA_LNK_FL_ENABLED); 812 if (!link) { 813 ret = -ENOMEM; 814 goto err_devnode; 815 } 816 817 link = media_create_intf_link(&m2m->pipe->video.vdev.entity, 818 &m2m->intf->intf, 819 MEDIA_LNK_FL_IMMUTABLE | 820 MEDIA_LNK_FL_ENABLED); 821 if (!link) { 822 ret = -ENOMEM; 823 goto err_devnode; 824 } 825 826 return 0; 827 828 err_devnode: 829 media_devnode_remove(m2m->intf); 830 err_entity_unreg: 831 media_device_unregister_entity(&vdev->entity); 832 err_entity_cleanup: 833 media_entity_cleanup(&vdev->entity); 834 err_video: 835 video_unregister_device(vdev); 836 err_m2m: 837 v4l2_m2m_release(m2m->m2m_dev); 838 err_mutex: 839 mutex_destroy(&m2m->lock); 840 return ret; 841 } 842 843 int mxc_isi_m2m_unregister(struct mxc_isi_dev *isi) 844 { 845 struct mxc_isi_m2m *m2m = &isi->m2m; 846 struct video_device *vdev = &m2m->vdev; 847 848 video_unregister_device(vdev); 849 850 v4l2_m2m_release(m2m->m2m_dev); 851 media_devnode_remove(m2m->intf); 852 media_entity_cleanup(&vdev->entity); 853 mutex_destroy(&m2m->lock); 854 855 return 0; 856 } 857