1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * V4L2 Capture CSI Subdev for Freescale i.MX5/6 SOC 4 * 5 * Copyright (c) 2014-2017 Mentor Graphics Inc. 6 * Copyright (C) 2017 Pengutronix, Philipp Zabel <kernel@pengutronix.de> 7 */ 8 #include <linux/delay.h> 9 #include <linux/gcd.h> 10 #include <linux/interrupt.h> 11 #include <linux/module.h> 12 #include <linux/of_graph.h> 13 #include <linux/pinctrl/consumer.h> 14 #include <linux/platform_device.h> 15 #include <media/v4l2-ctrls.h> 16 #include <media/v4l2-device.h> 17 #include <media/v4l2-event.h> 18 #include <media/v4l2-fwnode.h> 19 #include <media/v4l2-mc.h> 20 #include <media/v4l2-subdev.h> 21 #include <media/videobuf2-dma-contig.h> 22 #include <video/imx-ipu-v3.h> 23 #include <media/imx.h> 24 #include "imx-media.h" 25 26 /* 27 * Min/Max supported width and heights. 28 * 29 * We allow planar output, so we have to align width by 16 pixels 30 * to meet IDMAC alignment requirements. 31 * 32 * TODO: move this into pad format negotiation, if capture device 33 * has not requested planar formats, we should allow 8 pixel 34 * alignment. 35 */ 36 #define MIN_W 32 37 #define MIN_H 32 38 #define MAX_W 4096 39 #define MAX_H 4096 40 #define W_ALIGN 1 /* multiple of 2 pixels */ 41 #define H_ALIGN 1 /* multiple of 2 lines */ 42 #define S_ALIGN 1 /* multiple of 2 */ 43 44 /* 45 * struct csi_skip_desc - CSI frame skipping descriptor 46 * @keep - number of frames kept per max_ratio frames 47 * @max_ratio - width of skip_smfc, written to MAX_RATIO bitfield 48 * @skip_smfc - skip pattern written to the SKIP_SMFC bitfield 49 */ 50 struct csi_skip_desc { 51 u8 keep; 52 u8 max_ratio; 53 u8 skip_smfc; 54 }; 55 56 struct csi_priv { 57 struct device *dev; 58 struct ipu_soc *ipu; 59 struct v4l2_subdev sd; 60 struct media_pad pad[CSI_NUM_PADS]; 61 struct v4l2_async_notifier notifier; 62 63 /* the video device at IDMAC output pad */ 64 struct imx_media_video_dev *vdev; 65 struct imx_media_fim *fim; 66 int csi_id; 67 int smfc_id; 68 69 /* lock to protect all members below */ 70 struct mutex lock; 71 72 int active_output_pad; 73 74 struct ipuv3_channel *idmac_ch; 75 struct ipu_smfc *smfc; 76 struct ipu_csi *csi; 77 78 struct v4l2_mbus_framefmt format_mbus[CSI_NUM_PADS]; 79 const struct imx_media_pixfmt *cc[CSI_NUM_PADS]; 80 struct v4l2_fract frame_interval[CSI_NUM_PADS]; 81 struct v4l2_rect crop; 82 struct v4l2_rect compose; 83 const struct csi_skip_desc *skip; 84 85 /* active vb2 buffers to send to video dev sink */ 86 struct imx_media_buffer *active_vb2_buf[2]; 87 struct imx_media_dma_buf underrun_buf; 88 89 int ipu_buf_num; /* ipu double buffer index: 0-1 */ 90 91 /* the sink for the captured frames */ 92 struct media_entity *sink; 93 enum ipu_csi_dest dest; 94 /* the source subdev */ 95 struct v4l2_subdev *src_sd; 96 97 /* the mipi virtual channel number at link validate */ 98 int vc_num; 99 100 /* the upstream endpoint CSI is receiving from */ 101 struct v4l2_fwnode_endpoint upstream_ep; 102 103 spinlock_t irqlock; /* protect eof_irq handler */ 104 struct timer_list eof_timeout_timer; 105 int eof_irq; 106 int nfb4eof_irq; 107 108 struct v4l2_ctrl_handler ctrl_hdlr; 109 110 int stream_count; /* streaming counter */ 111 u32 frame_sequence; /* frame sequence counter */ 112 bool last_eof; /* waiting for last EOF at stream off */ 113 bool nfb4eof; /* NFB4EOF encountered during streaming */ 114 bool interweave_swap; /* swap top/bottom lines when interweaving */ 115 struct completion last_eof_comp; 116 }; 117 118 static inline struct csi_priv *sd_to_dev(struct v4l2_subdev *sdev) 119 { 120 return container_of(sdev, struct csi_priv, sd); 121 } 122 123 static inline struct csi_priv *notifier_to_dev(struct v4l2_async_notifier *n) 124 { 125 return container_of(n, struct csi_priv, notifier); 126 } 127 128 static inline bool is_parallel_bus(struct v4l2_fwnode_endpoint *ep) 129 { 130 return ep->bus_type != V4L2_MBUS_CSI2_DPHY; 131 } 132 133 static inline bool is_parallel_16bit_bus(struct v4l2_fwnode_endpoint *ep) 134 { 135 return is_parallel_bus(ep) && ep->bus.parallel.bus_width >= 16; 136 } 137 138 /* 139 * Check for conditions that require the IPU to handle the 140 * data internally as generic data, aka passthrough mode: 141 * - raw bayer media bus formats, or 142 * - BT.656 and BT.1120 (8/10-bit YUV422) data can always be processed 143 * on-the-fly 144 * - the CSI is receiving from a 16-bit parallel bus, or 145 * - the CSI is receiving from an 8-bit parallel bus and the incoming 146 * media bus format is other than UYVY8_2X8/YUYV8_2X8. 147 */ 148 static inline bool requires_passthrough(struct v4l2_fwnode_endpoint *ep, 149 struct v4l2_mbus_framefmt *infmt, 150 const struct imx_media_pixfmt *incc) 151 { 152 if (ep->bus_type == V4L2_MBUS_BT656) // including BT.1120 153 return false; 154 155 return incc->bayer || is_parallel_16bit_bus(ep) || 156 (is_parallel_bus(ep) && 157 infmt->code != MEDIA_BUS_FMT_UYVY8_2X8 && 158 infmt->code != MEDIA_BUS_FMT_YUYV8_2X8); 159 } 160 161 /* 162 * Parses the fwnode endpoint from the source pad of the entity 163 * connected to this CSI. This will either be the entity directly 164 * upstream from the CSI-2 receiver, directly upstream from the 165 * video mux, or directly upstream from the CSI itself. The endpoint 166 * is needed to determine the bus type and bus config coming into 167 * the CSI. 168 */ 169 static int csi_get_upstream_endpoint(struct csi_priv *priv, 170 struct v4l2_fwnode_endpoint *ep) 171 { 172 struct fwnode_handle *endpoint; 173 struct v4l2_subdev *sd; 174 struct media_pad *pad; 175 176 if (!IS_ENABLED(CONFIG_OF)) 177 return -ENXIO; 178 179 if (!priv->src_sd) 180 return -EPIPE; 181 182 sd = priv->src_sd; 183 184 switch (sd->grp_id) { 185 case IMX_MEDIA_GRP_ID_CSI_MUX: 186 /* 187 * CSI is connected directly to CSI mux, skip up to 188 * CSI-2 receiver if it is in the path, otherwise stay 189 * with the CSI mux. 190 */ 191 sd = imx_media_pipeline_subdev(&sd->entity, 192 IMX_MEDIA_GRP_ID_CSI2, 193 true); 194 if (IS_ERR(sd)) 195 sd = priv->src_sd; 196 break; 197 case IMX_MEDIA_GRP_ID_CSI2: 198 break; 199 default: 200 /* 201 * the source is neither the CSI mux nor the CSI-2 receiver, 202 * get the source pad directly upstream from CSI itself. 203 */ 204 sd = &priv->sd; 205 break; 206 } 207 208 /* get source pad of entity directly upstream from sd */ 209 pad = imx_media_pipeline_pad(&sd->entity, 0, 0, true); 210 if (!pad) 211 return -ENODEV; 212 213 endpoint = imx_media_get_pad_fwnode(pad); 214 if (IS_ERR(endpoint)) 215 return PTR_ERR(endpoint); 216 217 v4l2_fwnode_endpoint_parse(endpoint, ep); 218 219 fwnode_handle_put(endpoint); 220 221 return 0; 222 } 223 224 static void csi_idmac_put_ipu_resources(struct csi_priv *priv) 225 { 226 if (priv->idmac_ch) 227 ipu_idmac_put(priv->idmac_ch); 228 priv->idmac_ch = NULL; 229 230 if (priv->smfc) 231 ipu_smfc_put(priv->smfc); 232 priv->smfc = NULL; 233 } 234 235 static int csi_idmac_get_ipu_resources(struct csi_priv *priv) 236 { 237 int ch_num, ret; 238 struct ipu_smfc *smfc; 239 struct ipuv3_channel *idmac_ch; 240 241 ch_num = IPUV3_CHANNEL_CSI0 + priv->smfc_id; 242 243 smfc = ipu_smfc_get(priv->ipu, ch_num); 244 if (IS_ERR(smfc)) { 245 v4l2_err(&priv->sd, "failed to get SMFC\n"); 246 ret = PTR_ERR(smfc); 247 goto out; 248 } 249 priv->smfc = smfc; 250 251 idmac_ch = ipu_idmac_get(priv->ipu, ch_num); 252 if (IS_ERR(idmac_ch)) { 253 v4l2_err(&priv->sd, "could not get IDMAC channel %u\n", 254 ch_num); 255 ret = PTR_ERR(idmac_ch); 256 goto out; 257 } 258 priv->idmac_ch = idmac_ch; 259 260 return 0; 261 out: 262 csi_idmac_put_ipu_resources(priv); 263 return ret; 264 } 265 266 static void csi_vb2_buf_done(struct csi_priv *priv) 267 { 268 struct imx_media_video_dev *vdev = priv->vdev; 269 struct imx_media_buffer *done, *next; 270 struct vb2_buffer *vb; 271 dma_addr_t phys; 272 273 done = priv->active_vb2_buf[priv->ipu_buf_num]; 274 if (done) { 275 done->vbuf.field = vdev->fmt.field; 276 done->vbuf.sequence = priv->frame_sequence; 277 vb = &done->vbuf.vb2_buf; 278 vb->timestamp = ktime_get_ns(); 279 vb2_buffer_done(vb, priv->nfb4eof ? 280 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); 281 } 282 283 priv->frame_sequence++; 284 priv->nfb4eof = false; 285 286 /* get next queued buffer */ 287 next = imx_media_capture_device_next_buf(vdev); 288 if (next) { 289 phys = vb2_dma_contig_plane_dma_addr(&next->vbuf.vb2_buf, 0); 290 priv->active_vb2_buf[priv->ipu_buf_num] = next; 291 } else { 292 phys = priv->underrun_buf.phys; 293 priv->active_vb2_buf[priv->ipu_buf_num] = NULL; 294 } 295 296 if (ipu_idmac_buffer_is_ready(priv->idmac_ch, priv->ipu_buf_num)) 297 ipu_idmac_clear_buffer(priv->idmac_ch, priv->ipu_buf_num); 298 299 if (priv->interweave_swap) 300 phys += vdev->fmt.bytesperline; 301 302 ipu_cpmem_set_buffer(priv->idmac_ch, priv->ipu_buf_num, phys); 303 } 304 305 static irqreturn_t csi_idmac_eof_interrupt(int irq, void *dev_id) 306 { 307 struct csi_priv *priv = dev_id; 308 309 spin_lock(&priv->irqlock); 310 311 if (priv->last_eof) { 312 complete(&priv->last_eof_comp); 313 priv->last_eof = false; 314 goto unlock; 315 } 316 317 if (priv->fim) 318 /* call frame interval monitor */ 319 imx_media_fim_eof_monitor(priv->fim, ktime_get()); 320 321 csi_vb2_buf_done(priv); 322 323 /* select new IPU buf */ 324 ipu_idmac_select_buffer(priv->idmac_ch, priv->ipu_buf_num); 325 /* toggle IPU double-buffer index */ 326 priv->ipu_buf_num ^= 1; 327 328 /* bump the EOF timeout timer */ 329 mod_timer(&priv->eof_timeout_timer, 330 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT)); 331 332 unlock: 333 spin_unlock(&priv->irqlock); 334 return IRQ_HANDLED; 335 } 336 337 static irqreturn_t csi_idmac_nfb4eof_interrupt(int irq, void *dev_id) 338 { 339 struct csi_priv *priv = dev_id; 340 341 spin_lock(&priv->irqlock); 342 343 /* 344 * this is not an unrecoverable error, just mark 345 * the next captured frame with vb2 error flag. 346 */ 347 priv->nfb4eof = true; 348 349 v4l2_err(&priv->sd, "NFB4EOF\n"); 350 351 spin_unlock(&priv->irqlock); 352 353 return IRQ_HANDLED; 354 } 355 356 /* 357 * EOF timeout timer function. This is an unrecoverable condition 358 * without a stream restart. 359 */ 360 static void csi_idmac_eof_timeout(struct timer_list *t) 361 { 362 struct csi_priv *priv = from_timer(priv, t, eof_timeout_timer); 363 struct imx_media_video_dev *vdev = priv->vdev; 364 365 v4l2_err(&priv->sd, "EOF timeout\n"); 366 367 /* signal a fatal error to capture device */ 368 imx_media_capture_device_error(vdev); 369 } 370 371 static void csi_idmac_setup_vb2_buf(struct csi_priv *priv, dma_addr_t *phys) 372 { 373 struct imx_media_video_dev *vdev = priv->vdev; 374 struct imx_media_buffer *buf; 375 int i; 376 377 for (i = 0; i < 2; i++) { 378 buf = imx_media_capture_device_next_buf(vdev); 379 if (buf) { 380 priv->active_vb2_buf[i] = buf; 381 phys[i] = vb2_dma_contig_plane_dma_addr( 382 &buf->vbuf.vb2_buf, 0); 383 } else { 384 priv->active_vb2_buf[i] = NULL; 385 phys[i] = priv->underrun_buf.phys; 386 } 387 } 388 } 389 390 static void csi_idmac_unsetup_vb2_buf(struct csi_priv *priv, 391 enum vb2_buffer_state return_status) 392 { 393 struct imx_media_buffer *buf; 394 int i; 395 396 /* return any remaining active frames with return_status */ 397 for (i = 0; i < 2; i++) { 398 buf = priv->active_vb2_buf[i]; 399 if (buf) { 400 struct vb2_buffer *vb = &buf->vbuf.vb2_buf; 401 402 vb->timestamp = ktime_get_ns(); 403 vb2_buffer_done(vb, return_status); 404 } 405 } 406 } 407 408 /* init the SMFC IDMAC channel */ 409 static int csi_idmac_setup_channel(struct csi_priv *priv) 410 { 411 struct imx_media_video_dev *vdev = priv->vdev; 412 const struct imx_media_pixfmt *incc; 413 struct v4l2_mbus_framefmt *infmt; 414 struct v4l2_mbus_framefmt *outfmt; 415 bool passthrough, interweave; 416 struct ipu_image image; 417 u32 passthrough_bits; 418 u32 passthrough_cycles; 419 dma_addr_t phys[2]; 420 u32 burst_size; 421 int ret; 422 423 infmt = &priv->format_mbus[CSI_SINK_PAD]; 424 incc = priv->cc[CSI_SINK_PAD]; 425 outfmt = &priv->format_mbus[CSI_SRC_PAD_IDMAC]; 426 427 ipu_cpmem_zero(priv->idmac_ch); 428 429 memset(&image, 0, sizeof(image)); 430 image.pix = vdev->fmt; 431 image.rect = vdev->compose; 432 433 csi_idmac_setup_vb2_buf(priv, phys); 434 435 image.phys0 = phys[0]; 436 image.phys1 = phys[1]; 437 438 passthrough = requires_passthrough(&priv->upstream_ep, infmt, incc); 439 passthrough_cycles = 1; 440 441 /* 442 * If the field type at capture interface is interlaced, and 443 * the output IDMAC pad is sequential, enable interweave at 444 * the IDMAC output channel. 445 */ 446 interweave = V4L2_FIELD_IS_INTERLACED(image.pix.field) && 447 V4L2_FIELD_IS_SEQUENTIAL(outfmt->field); 448 priv->interweave_swap = interweave && 449 image.pix.field == V4L2_FIELD_INTERLACED_BT; 450 451 switch (image.pix.pixelformat) { 452 case V4L2_PIX_FMT_SBGGR8: 453 case V4L2_PIX_FMT_SGBRG8: 454 case V4L2_PIX_FMT_SGRBG8: 455 case V4L2_PIX_FMT_SRGGB8: 456 case V4L2_PIX_FMT_GREY: 457 burst_size = 16; 458 passthrough_bits = 8; 459 break; 460 case V4L2_PIX_FMT_SBGGR16: 461 case V4L2_PIX_FMT_SGBRG16: 462 case V4L2_PIX_FMT_SGRBG16: 463 case V4L2_PIX_FMT_SRGGB16: 464 case V4L2_PIX_FMT_Y10: 465 case V4L2_PIX_FMT_Y12: 466 burst_size = 8; 467 passthrough_bits = 16; 468 break; 469 case V4L2_PIX_FMT_YUV420: 470 case V4L2_PIX_FMT_YVU420: 471 case V4L2_PIX_FMT_NV12: 472 burst_size = (image.pix.width & 0x3f) ? 473 ((image.pix.width & 0x1f) ? 474 ((image.pix.width & 0xf) ? 8 : 16) : 32) : 64; 475 passthrough_bits = 16; 476 /* 477 * Skip writing U and V components to odd rows (but not 478 * when enabling IDMAC interweaving, they are incompatible). 479 */ 480 if (!interweave) 481 ipu_cpmem_skip_odd_chroma_rows(priv->idmac_ch); 482 break; 483 case V4L2_PIX_FMT_YUYV: 484 case V4L2_PIX_FMT_UYVY: 485 burst_size = (image.pix.width & 0x1f) ? 486 ((image.pix.width & 0xf) ? 8 : 16) : 32; 487 passthrough_bits = 16; 488 break; 489 case V4L2_PIX_FMT_RGB565: 490 if (passthrough) { 491 burst_size = 16; 492 passthrough_bits = 8; 493 passthrough_cycles = incc->cycles; 494 break; 495 } 496 fallthrough; /* non-passthrough RGB565 (CSI-2 bus) */ 497 default: 498 burst_size = (image.pix.width & 0xf) ? 8 : 16; 499 passthrough_bits = 16; 500 break; 501 } 502 503 if (passthrough) { 504 if (priv->interweave_swap) { 505 /* start interweave scan at 1st top line (2nd line) */ 506 image.phys0 += image.pix.bytesperline; 507 image.phys1 += image.pix.bytesperline; 508 } 509 510 ipu_cpmem_set_resolution(priv->idmac_ch, 511 image.rect.width * passthrough_cycles, 512 image.rect.height); 513 ipu_cpmem_set_stride(priv->idmac_ch, image.pix.bytesperline); 514 ipu_cpmem_set_buffer(priv->idmac_ch, 0, image.phys0); 515 ipu_cpmem_set_buffer(priv->idmac_ch, 1, image.phys1); 516 ipu_cpmem_set_format_passthrough(priv->idmac_ch, 517 passthrough_bits); 518 } else { 519 if (priv->interweave_swap) { 520 /* start interweave scan at 1st top line (2nd line) */ 521 image.rect.top = 1; 522 } 523 524 ret = ipu_cpmem_set_image(priv->idmac_ch, &image); 525 if (ret) 526 goto unsetup_vb2; 527 } 528 529 ipu_cpmem_set_burstsize(priv->idmac_ch, burst_size); 530 531 /* 532 * Set the channel for the direct CSI-->memory via SMFC 533 * use-case to very high priority, by enabling the watermark 534 * signal in the SMFC, enabling WM in the channel, and setting 535 * the channel priority to high. 536 * 537 * Refer to the i.mx6 rev. D TRM Table 36-8: Calculated priority 538 * value. 539 * 540 * The WM's are set very low by intention here to ensure that 541 * the SMFC FIFOs do not overflow. 542 */ 543 ipu_smfc_set_watermark(priv->smfc, 0x02, 0x01); 544 ipu_cpmem_set_high_priority(priv->idmac_ch); 545 ipu_idmac_enable_watermark(priv->idmac_ch, true); 546 ipu_cpmem_set_axi_id(priv->idmac_ch, 0); 547 548 burst_size = passthrough ? 549 (burst_size >> 3) - 1 : (burst_size >> 2) - 1; 550 551 ipu_smfc_set_burstsize(priv->smfc, burst_size); 552 553 if (interweave) 554 ipu_cpmem_interlaced_scan(priv->idmac_ch, 555 priv->interweave_swap ? 556 -image.pix.bytesperline : 557 image.pix.bytesperline, 558 image.pix.pixelformat); 559 560 ipu_idmac_set_double_buffer(priv->idmac_ch, true); 561 562 return 0; 563 564 unsetup_vb2: 565 csi_idmac_unsetup_vb2_buf(priv, VB2_BUF_STATE_QUEUED); 566 return ret; 567 } 568 569 static void csi_idmac_unsetup(struct csi_priv *priv, 570 enum vb2_buffer_state state) 571 { 572 ipu_idmac_disable_channel(priv->idmac_ch); 573 ipu_smfc_disable(priv->smfc); 574 575 csi_idmac_unsetup_vb2_buf(priv, state); 576 } 577 578 static int csi_idmac_setup(struct csi_priv *priv) 579 { 580 int ret; 581 582 ret = csi_idmac_setup_channel(priv); 583 if (ret) 584 return ret; 585 586 ipu_cpmem_dump(priv->idmac_ch); 587 ipu_dump(priv->ipu); 588 589 ipu_smfc_enable(priv->smfc); 590 591 /* set buffers ready */ 592 ipu_idmac_select_buffer(priv->idmac_ch, 0); 593 ipu_idmac_select_buffer(priv->idmac_ch, 1); 594 595 /* enable the channels */ 596 ipu_idmac_enable_channel(priv->idmac_ch); 597 598 return 0; 599 } 600 601 static int csi_idmac_start(struct csi_priv *priv) 602 { 603 struct imx_media_video_dev *vdev = priv->vdev; 604 int ret; 605 606 ret = csi_idmac_get_ipu_resources(priv); 607 if (ret) 608 return ret; 609 610 ipu_smfc_map_channel(priv->smfc, priv->csi_id, priv->vc_num); 611 612 ret = imx_media_alloc_dma_buf(priv->dev, &priv->underrun_buf, 613 vdev->fmt.sizeimage); 614 if (ret) 615 goto out_put_ipu; 616 617 priv->ipu_buf_num = 0; 618 619 /* init EOF completion waitq */ 620 init_completion(&priv->last_eof_comp); 621 priv->frame_sequence = 0; 622 priv->last_eof = false; 623 priv->nfb4eof = false; 624 625 ret = csi_idmac_setup(priv); 626 if (ret) { 627 v4l2_err(&priv->sd, "csi_idmac_setup failed: %d\n", ret); 628 goto out_free_dma_buf; 629 } 630 631 priv->nfb4eof_irq = ipu_idmac_channel_irq(priv->ipu, 632 priv->idmac_ch, 633 IPU_IRQ_NFB4EOF); 634 ret = devm_request_irq(priv->dev, priv->nfb4eof_irq, 635 csi_idmac_nfb4eof_interrupt, 0, 636 "imx-smfc-nfb4eof", priv); 637 if (ret) { 638 v4l2_err(&priv->sd, 639 "Error registering NFB4EOF irq: %d\n", ret); 640 goto out_unsetup; 641 } 642 643 priv->eof_irq = ipu_idmac_channel_irq(priv->ipu, priv->idmac_ch, 644 IPU_IRQ_EOF); 645 646 ret = devm_request_irq(priv->dev, priv->eof_irq, 647 csi_idmac_eof_interrupt, 0, 648 "imx-smfc-eof", priv); 649 if (ret) { 650 v4l2_err(&priv->sd, 651 "Error registering eof irq: %d\n", ret); 652 goto out_free_nfb4eof_irq; 653 } 654 655 /* start the EOF timeout timer */ 656 mod_timer(&priv->eof_timeout_timer, 657 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT)); 658 659 return 0; 660 661 out_free_nfb4eof_irq: 662 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv); 663 out_unsetup: 664 csi_idmac_unsetup(priv, VB2_BUF_STATE_QUEUED); 665 out_free_dma_buf: 666 imx_media_free_dma_buf(priv->dev, &priv->underrun_buf); 667 out_put_ipu: 668 csi_idmac_put_ipu_resources(priv); 669 return ret; 670 } 671 672 static void csi_idmac_wait_last_eof(struct csi_priv *priv) 673 { 674 unsigned long flags; 675 int ret; 676 677 /* mark next EOF interrupt as the last before stream off */ 678 spin_lock_irqsave(&priv->irqlock, flags); 679 priv->last_eof = true; 680 spin_unlock_irqrestore(&priv->irqlock, flags); 681 682 /* 683 * and then wait for interrupt handler to mark completion. 684 */ 685 ret = wait_for_completion_timeout( 686 &priv->last_eof_comp, msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT)); 687 if (ret == 0) 688 v4l2_warn(&priv->sd, "wait last EOF timeout\n"); 689 } 690 691 static void csi_idmac_stop(struct csi_priv *priv) 692 { 693 devm_free_irq(priv->dev, priv->eof_irq, priv); 694 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv); 695 696 csi_idmac_unsetup(priv, VB2_BUF_STATE_ERROR); 697 698 imx_media_free_dma_buf(priv->dev, &priv->underrun_buf); 699 700 /* cancel the EOF timeout timer */ 701 del_timer_sync(&priv->eof_timeout_timer); 702 703 csi_idmac_put_ipu_resources(priv); 704 } 705 706 /* Update the CSI whole sensor and active windows */ 707 static int csi_setup(struct csi_priv *priv) 708 { 709 struct v4l2_mbus_framefmt *infmt, *outfmt; 710 const struct imx_media_pixfmt *incc; 711 struct v4l2_mbus_config mbus_cfg; 712 struct v4l2_mbus_framefmt if_fmt; 713 struct v4l2_rect crop; 714 715 infmt = &priv->format_mbus[CSI_SINK_PAD]; 716 incc = priv->cc[CSI_SINK_PAD]; 717 outfmt = &priv->format_mbus[priv->active_output_pad]; 718 719 /* compose mbus_config from the upstream endpoint */ 720 mbus_cfg.type = priv->upstream_ep.bus_type; 721 mbus_cfg.flags = is_parallel_bus(&priv->upstream_ep) ? 722 priv->upstream_ep.bus.parallel.flags : 723 priv->upstream_ep.bus.mipi_csi2.flags; 724 725 if_fmt = *infmt; 726 crop = priv->crop; 727 728 /* 729 * if cycles is set, we need to handle this over multiple cycles as 730 * generic/bayer data 731 */ 732 if (is_parallel_bus(&priv->upstream_ep) && incc->cycles) { 733 if_fmt.width *= incc->cycles; 734 crop.width *= incc->cycles; 735 } 736 737 ipu_csi_set_window(priv->csi, &crop); 738 739 ipu_csi_set_downsize(priv->csi, 740 priv->crop.width == 2 * priv->compose.width, 741 priv->crop.height == 2 * priv->compose.height); 742 743 ipu_csi_init_interface(priv->csi, &mbus_cfg, &if_fmt, outfmt); 744 745 ipu_csi_set_dest(priv->csi, priv->dest); 746 747 if (priv->dest == IPU_CSI_DEST_IDMAC) 748 ipu_csi_set_skip_smfc(priv->csi, priv->skip->skip_smfc, 749 priv->skip->max_ratio - 1, 0); 750 751 ipu_csi_dump(priv->csi); 752 753 return 0; 754 } 755 756 static int csi_start(struct csi_priv *priv) 757 { 758 struct v4l2_fract *input_fi, *output_fi; 759 int ret; 760 761 input_fi = &priv->frame_interval[CSI_SINK_PAD]; 762 output_fi = &priv->frame_interval[priv->active_output_pad]; 763 764 /* start upstream */ 765 ret = v4l2_subdev_call(priv->src_sd, video, s_stream, 1); 766 ret = (ret && ret != -ENOIOCTLCMD) ? ret : 0; 767 if (ret) 768 return ret; 769 770 /* Skip first few frames from a BT.656 source */ 771 if (priv->upstream_ep.bus_type == V4L2_MBUS_BT656) { 772 u32 delay_usec, bad_frames = 20; 773 774 delay_usec = DIV_ROUND_UP_ULL((u64)USEC_PER_SEC * 775 input_fi->numerator * bad_frames, 776 input_fi->denominator); 777 778 usleep_range(delay_usec, delay_usec + 1000); 779 } 780 781 if (priv->dest == IPU_CSI_DEST_IDMAC) { 782 ret = csi_idmac_start(priv); 783 if (ret) 784 goto stop_upstream; 785 } 786 787 ret = csi_setup(priv); 788 if (ret) 789 goto idmac_stop; 790 791 /* start the frame interval monitor */ 792 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC) { 793 ret = imx_media_fim_set_stream(priv->fim, output_fi, true); 794 if (ret) 795 goto idmac_stop; 796 } 797 798 ret = ipu_csi_enable(priv->csi); 799 if (ret) { 800 v4l2_err(&priv->sd, "CSI enable error: %d\n", ret); 801 goto fim_off; 802 } 803 804 return 0; 805 806 fim_off: 807 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC) 808 imx_media_fim_set_stream(priv->fim, NULL, false); 809 idmac_stop: 810 if (priv->dest == IPU_CSI_DEST_IDMAC) 811 csi_idmac_stop(priv); 812 stop_upstream: 813 v4l2_subdev_call(priv->src_sd, video, s_stream, 0); 814 return ret; 815 } 816 817 static void csi_stop(struct csi_priv *priv) 818 { 819 if (priv->dest == IPU_CSI_DEST_IDMAC) 820 csi_idmac_wait_last_eof(priv); 821 822 /* 823 * Disable the CSI asap, after syncing with the last EOF. 824 * Doing so after the IDMA channel is disabled has shown to 825 * create hard system-wide hangs. 826 */ 827 ipu_csi_disable(priv->csi); 828 829 /* stop upstream */ 830 v4l2_subdev_call(priv->src_sd, video, s_stream, 0); 831 832 if (priv->dest == IPU_CSI_DEST_IDMAC) { 833 csi_idmac_stop(priv); 834 835 /* stop the frame interval monitor */ 836 if (priv->fim) 837 imx_media_fim_set_stream(priv->fim, NULL, false); 838 } 839 } 840 841 static const struct csi_skip_desc csi_skip[12] = { 842 { 1, 1, 0x00 }, /* Keep all frames */ 843 { 5, 6, 0x10 }, /* Skip every sixth frame */ 844 { 4, 5, 0x08 }, /* Skip every fifth frame */ 845 { 3, 4, 0x04 }, /* Skip every fourth frame */ 846 { 2, 3, 0x02 }, /* Skip every third frame */ 847 { 3, 5, 0x0a }, /* Skip frames 1 and 3 of every 5 */ 848 { 1, 2, 0x01 }, /* Skip every second frame */ 849 { 2, 5, 0x0b }, /* Keep frames 1 and 4 of every 5 */ 850 { 1, 3, 0x03 }, /* Keep one in three frames */ 851 { 1, 4, 0x07 }, /* Keep one in four frames */ 852 { 1, 5, 0x0f }, /* Keep one in five frames */ 853 { 1, 6, 0x1f }, /* Keep one in six frames */ 854 }; 855 856 static void csi_apply_skip_interval(const struct csi_skip_desc *skip, 857 struct v4l2_fract *interval) 858 { 859 unsigned int div; 860 861 interval->numerator *= skip->max_ratio; 862 interval->denominator *= skip->keep; 863 864 /* Reduce fraction to lowest terms */ 865 div = gcd(interval->numerator, interval->denominator); 866 if (div > 1) { 867 interval->numerator /= div; 868 interval->denominator /= div; 869 } 870 } 871 872 /* 873 * Find the skip pattern to produce the output frame interval closest to the 874 * requested one, for the given input frame interval. Updates the output frame 875 * interval to the exact value. 876 */ 877 static const struct csi_skip_desc *csi_find_best_skip(struct v4l2_fract *in, 878 struct v4l2_fract *out) 879 { 880 const struct csi_skip_desc *skip = &csi_skip[0], *best_skip = skip; 881 u32 min_err = UINT_MAX; 882 u64 want_us; 883 int i; 884 885 /* Default to 1:1 ratio */ 886 if (out->numerator == 0 || out->denominator == 0 || 887 in->numerator == 0 || in->denominator == 0) { 888 *out = *in; 889 return best_skip; 890 } 891 892 want_us = div_u64((u64)USEC_PER_SEC * out->numerator, out->denominator); 893 894 /* Find the reduction closest to the requested time per frame */ 895 for (i = 0; i < ARRAY_SIZE(csi_skip); i++, skip++) { 896 u64 tmp, err; 897 898 tmp = div_u64((u64)USEC_PER_SEC * in->numerator * 899 skip->max_ratio, in->denominator * skip->keep); 900 901 err = abs((s64)tmp - want_us); 902 if (err < min_err) { 903 min_err = err; 904 best_skip = skip; 905 } 906 } 907 908 *out = *in; 909 csi_apply_skip_interval(best_skip, out); 910 911 return best_skip; 912 } 913 914 /* 915 * V4L2 subdev operations. 916 */ 917 918 static int csi_g_frame_interval(struct v4l2_subdev *sd, 919 struct v4l2_subdev_frame_interval *fi) 920 { 921 struct csi_priv *priv = v4l2_get_subdevdata(sd); 922 923 if (fi->pad >= CSI_NUM_PADS) 924 return -EINVAL; 925 926 mutex_lock(&priv->lock); 927 928 fi->interval = priv->frame_interval[fi->pad]; 929 930 mutex_unlock(&priv->lock); 931 932 return 0; 933 } 934 935 static int csi_s_frame_interval(struct v4l2_subdev *sd, 936 struct v4l2_subdev_frame_interval *fi) 937 { 938 struct csi_priv *priv = v4l2_get_subdevdata(sd); 939 struct v4l2_fract *input_fi; 940 int ret = 0; 941 942 mutex_lock(&priv->lock); 943 944 input_fi = &priv->frame_interval[CSI_SINK_PAD]; 945 946 switch (fi->pad) { 947 case CSI_SINK_PAD: 948 /* No limits on valid input frame intervals */ 949 if (fi->interval.numerator == 0 || 950 fi->interval.denominator == 0) 951 fi->interval = *input_fi; 952 /* Reset output intervals and frame skipping ratio to 1:1 */ 953 priv->frame_interval[CSI_SRC_PAD_IDMAC] = fi->interval; 954 priv->frame_interval[CSI_SRC_PAD_DIRECT] = fi->interval; 955 priv->skip = &csi_skip[0]; 956 break; 957 case CSI_SRC_PAD_IDMAC: 958 /* 959 * frame interval at IDMAC output pad depends on input 960 * interval, modified by frame skipping. 961 */ 962 priv->skip = csi_find_best_skip(input_fi, &fi->interval); 963 break; 964 case CSI_SRC_PAD_DIRECT: 965 /* 966 * frame interval at DIRECT output pad is same as input 967 * interval. 968 */ 969 fi->interval = *input_fi; 970 break; 971 default: 972 ret = -EINVAL; 973 goto out; 974 } 975 976 priv->frame_interval[fi->pad] = fi->interval; 977 out: 978 mutex_unlock(&priv->lock); 979 return ret; 980 } 981 982 static int csi_s_stream(struct v4l2_subdev *sd, int enable) 983 { 984 struct csi_priv *priv = v4l2_get_subdevdata(sd); 985 int ret = 0; 986 987 mutex_lock(&priv->lock); 988 989 if (!priv->src_sd || !priv->sink) { 990 ret = -EPIPE; 991 goto out; 992 } 993 994 /* 995 * enable/disable streaming only if stream_count is 996 * going from 0 to 1 / 1 to 0. 997 */ 998 if (priv->stream_count != !enable) 999 goto update_count; 1000 1001 if (enable) { 1002 dev_dbg(priv->dev, "stream ON\n"); 1003 ret = csi_start(priv); 1004 if (ret) 1005 goto out; 1006 } else { 1007 dev_dbg(priv->dev, "stream OFF\n"); 1008 csi_stop(priv); 1009 } 1010 1011 update_count: 1012 priv->stream_count += enable ? 1 : -1; 1013 if (priv->stream_count < 0) 1014 priv->stream_count = 0; 1015 out: 1016 mutex_unlock(&priv->lock); 1017 return ret; 1018 } 1019 1020 static int csi_link_setup(struct media_entity *entity, 1021 const struct media_pad *local, 1022 const struct media_pad *remote, u32 flags) 1023 { 1024 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); 1025 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1026 struct v4l2_subdev *remote_sd; 1027 int ret = 0; 1028 1029 dev_dbg(priv->dev, "link setup %s -> %s\n", remote->entity->name, 1030 local->entity->name); 1031 1032 mutex_lock(&priv->lock); 1033 1034 if (local->flags & MEDIA_PAD_FL_SINK) { 1035 if (!is_media_entity_v4l2_subdev(remote->entity)) { 1036 ret = -EINVAL; 1037 goto out; 1038 } 1039 1040 remote_sd = media_entity_to_v4l2_subdev(remote->entity); 1041 1042 if (flags & MEDIA_LNK_FL_ENABLED) { 1043 if (priv->src_sd) { 1044 ret = -EBUSY; 1045 goto out; 1046 } 1047 priv->src_sd = remote_sd; 1048 } else { 1049 priv->src_sd = NULL; 1050 } 1051 1052 goto out; 1053 } 1054 1055 /* this is a source pad */ 1056 1057 if (flags & MEDIA_LNK_FL_ENABLED) { 1058 if (priv->sink) { 1059 ret = -EBUSY; 1060 goto out; 1061 } 1062 } else { 1063 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 1064 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0); 1065 priv->sink = NULL; 1066 /* do not apply IC burst alignment in csi_try_crop */ 1067 priv->active_output_pad = CSI_SRC_PAD_IDMAC; 1068 goto out; 1069 } 1070 1071 /* record which output pad is now active */ 1072 priv->active_output_pad = local->index; 1073 1074 /* set CSI destination */ 1075 if (local->index == CSI_SRC_PAD_IDMAC) { 1076 if (!is_media_entity_v4l2_video_device(remote->entity)) { 1077 ret = -EINVAL; 1078 goto out; 1079 } 1080 1081 if (priv->fim) { 1082 ret = imx_media_fim_add_controls(priv->fim); 1083 if (ret) 1084 goto out; 1085 } 1086 1087 priv->dest = IPU_CSI_DEST_IDMAC; 1088 } else { 1089 if (!is_media_entity_v4l2_subdev(remote->entity)) { 1090 ret = -EINVAL; 1091 goto out; 1092 } 1093 1094 remote_sd = media_entity_to_v4l2_subdev(remote->entity); 1095 switch (remote_sd->grp_id) { 1096 case IMX_MEDIA_GRP_ID_IPU_VDIC: 1097 priv->dest = IPU_CSI_DEST_VDIC; 1098 break; 1099 case IMX_MEDIA_GRP_ID_IPU_IC_PRP: 1100 priv->dest = IPU_CSI_DEST_IC; 1101 break; 1102 default: 1103 ret = -EINVAL; 1104 goto out; 1105 } 1106 } 1107 1108 priv->sink = remote->entity; 1109 out: 1110 mutex_unlock(&priv->lock); 1111 return ret; 1112 } 1113 1114 static int csi_link_validate(struct v4l2_subdev *sd, 1115 struct media_link *link, 1116 struct v4l2_subdev_format *source_fmt, 1117 struct v4l2_subdev_format *sink_fmt) 1118 { 1119 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1120 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1121 bool is_csi2; 1122 int ret; 1123 1124 ret = v4l2_subdev_link_validate_default(sd, link, 1125 source_fmt, sink_fmt); 1126 if (ret) 1127 return ret; 1128 1129 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1130 if (ret) { 1131 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1132 return ret; 1133 } 1134 1135 mutex_lock(&priv->lock); 1136 1137 priv->upstream_ep = upstream_ep; 1138 is_csi2 = !is_parallel_bus(&upstream_ep); 1139 if (is_csi2) { 1140 /* 1141 * NOTE! It seems the virtual channels from the mipi csi-2 1142 * receiver are used only for routing by the video mux's, 1143 * or for hard-wired routing to the CSI's. Once the stream 1144 * enters the CSI's however, they are treated internally 1145 * in the IPU as virtual channel 0. 1146 */ 1147 ipu_csi_set_mipi_datatype(priv->csi, 0, 1148 &priv->format_mbus[CSI_SINK_PAD]); 1149 } 1150 1151 /* select either parallel or MIPI-CSI2 as input to CSI */ 1152 ipu_set_csi_src_mux(priv->ipu, priv->csi_id, is_csi2); 1153 1154 mutex_unlock(&priv->lock); 1155 return ret; 1156 } 1157 1158 static struct v4l2_mbus_framefmt * 1159 __csi_get_fmt(struct csi_priv *priv, struct v4l2_subdev_state *sd_state, 1160 unsigned int pad, enum v4l2_subdev_format_whence which) 1161 { 1162 if (which == V4L2_SUBDEV_FORMAT_TRY) 1163 return v4l2_subdev_get_try_format(&priv->sd, sd_state, pad); 1164 else 1165 return &priv->format_mbus[pad]; 1166 } 1167 1168 static struct v4l2_rect * 1169 __csi_get_crop(struct csi_priv *priv, struct v4l2_subdev_state *sd_state, 1170 enum v4l2_subdev_format_whence which) 1171 { 1172 if (which == V4L2_SUBDEV_FORMAT_TRY) 1173 return v4l2_subdev_get_try_crop(&priv->sd, sd_state, 1174 CSI_SINK_PAD); 1175 else 1176 return &priv->crop; 1177 } 1178 1179 static struct v4l2_rect * 1180 __csi_get_compose(struct csi_priv *priv, struct v4l2_subdev_state *sd_state, 1181 enum v4l2_subdev_format_whence which) 1182 { 1183 if (which == V4L2_SUBDEV_FORMAT_TRY) 1184 return v4l2_subdev_get_try_compose(&priv->sd, sd_state, 1185 CSI_SINK_PAD); 1186 else 1187 return &priv->compose; 1188 } 1189 1190 static void csi_try_crop(struct csi_priv *priv, 1191 struct v4l2_rect *crop, 1192 struct v4l2_subdev_state *sd_state, 1193 struct v4l2_mbus_framefmt *infmt, 1194 struct v4l2_fwnode_endpoint *upstream_ep) 1195 { 1196 u32 in_height; 1197 1198 crop->width = min_t(__u32, infmt->width, crop->width); 1199 if (crop->left + crop->width > infmt->width) 1200 crop->left = infmt->width - crop->width; 1201 /* adjust crop left/width to h/w alignment restrictions */ 1202 crop->left &= ~0x3; 1203 if (priv->active_output_pad == CSI_SRC_PAD_DIRECT) 1204 crop->width &= ~0x7; /* multiple of 8 pixels (IC burst) */ 1205 else 1206 crop->width &= ~0x1; /* multiple of 2 pixels */ 1207 1208 in_height = infmt->height; 1209 if (infmt->field == V4L2_FIELD_ALTERNATE) 1210 in_height *= 2; 1211 1212 /* 1213 * FIXME: not sure why yet, but on interlaced bt.656, 1214 * changing the vertical cropping causes loss of vertical 1215 * sync, so fix it to NTSC/PAL active lines. NTSC contains 1216 * 2 extra lines of active video that need to be cropped. 1217 */ 1218 if (upstream_ep->bus_type == V4L2_MBUS_BT656 && 1219 (V4L2_FIELD_HAS_BOTH(infmt->field) || 1220 infmt->field == V4L2_FIELD_ALTERNATE)) { 1221 crop->height = in_height; 1222 crop->top = (in_height == 480) ? 2 : 0; 1223 } else { 1224 crop->height = min_t(__u32, in_height, crop->height); 1225 if (crop->top + crop->height > in_height) 1226 crop->top = in_height - crop->height; 1227 } 1228 } 1229 1230 static int csi_enum_mbus_code(struct v4l2_subdev *sd, 1231 struct v4l2_subdev_state *sd_state, 1232 struct v4l2_subdev_mbus_code_enum *code) 1233 { 1234 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1235 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1236 const struct imx_media_pixfmt *incc; 1237 struct v4l2_mbus_framefmt *infmt; 1238 int ret = 0; 1239 1240 mutex_lock(&priv->lock); 1241 1242 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, code->which); 1243 incc = imx_media_find_mbus_format(infmt->code, PIXFMT_SEL_ANY); 1244 1245 switch (code->pad) { 1246 case CSI_SINK_PAD: 1247 ret = imx_media_enum_mbus_formats(&code->code, code->index, 1248 PIXFMT_SEL_ANY); 1249 break; 1250 case CSI_SRC_PAD_DIRECT: 1251 case CSI_SRC_PAD_IDMAC: 1252 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1253 if (ret) { 1254 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1255 goto out; 1256 } 1257 1258 if (requires_passthrough(&upstream_ep, infmt, incc)) { 1259 if (code->index != 0) { 1260 ret = -EINVAL; 1261 goto out; 1262 } 1263 code->code = infmt->code; 1264 } else { 1265 enum imx_pixfmt_sel fmt_sel = 1266 (incc->cs == IPUV3_COLORSPACE_YUV) ? 1267 PIXFMT_SEL_YUV : PIXFMT_SEL_RGB; 1268 1269 ret = imx_media_enum_ipu_formats(&code->code, 1270 code->index, 1271 fmt_sel); 1272 } 1273 break; 1274 default: 1275 ret = -EINVAL; 1276 } 1277 1278 out: 1279 mutex_unlock(&priv->lock); 1280 return ret; 1281 } 1282 1283 static int csi_enum_frame_size(struct v4l2_subdev *sd, 1284 struct v4l2_subdev_state *sd_state, 1285 struct v4l2_subdev_frame_size_enum *fse) 1286 { 1287 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1288 struct v4l2_rect *crop; 1289 int ret = 0; 1290 1291 if (fse->pad >= CSI_NUM_PADS || 1292 fse->index > (fse->pad == CSI_SINK_PAD ? 0 : 3)) 1293 return -EINVAL; 1294 1295 mutex_lock(&priv->lock); 1296 1297 if (fse->pad == CSI_SINK_PAD) { 1298 fse->min_width = MIN_W; 1299 fse->max_width = MAX_W; 1300 fse->min_height = MIN_H; 1301 fse->max_height = MAX_H; 1302 } else { 1303 crop = __csi_get_crop(priv, sd_state, fse->which); 1304 1305 fse->min_width = fse->index & 1 ? 1306 crop->width / 2 : crop->width; 1307 fse->max_width = fse->min_width; 1308 fse->min_height = fse->index & 2 ? 1309 crop->height / 2 : crop->height; 1310 fse->max_height = fse->min_height; 1311 } 1312 1313 mutex_unlock(&priv->lock); 1314 return ret; 1315 } 1316 1317 static int csi_enum_frame_interval(struct v4l2_subdev *sd, 1318 struct v4l2_subdev_state *sd_state, 1319 struct v4l2_subdev_frame_interval_enum *fie) 1320 { 1321 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1322 struct v4l2_fract *input_fi; 1323 struct v4l2_rect *crop; 1324 int ret = 0; 1325 1326 if (fie->pad >= CSI_NUM_PADS || 1327 fie->index >= (fie->pad != CSI_SRC_PAD_IDMAC ? 1328 1 : ARRAY_SIZE(csi_skip))) 1329 return -EINVAL; 1330 1331 mutex_lock(&priv->lock); 1332 1333 input_fi = &priv->frame_interval[CSI_SINK_PAD]; 1334 crop = __csi_get_crop(priv, sd_state, fie->which); 1335 1336 if ((fie->width != crop->width && fie->width != crop->width / 2) || 1337 (fie->height != crop->height && fie->height != crop->height / 2)) { 1338 ret = -EINVAL; 1339 goto out; 1340 } 1341 1342 fie->interval = *input_fi; 1343 1344 if (fie->pad == CSI_SRC_PAD_IDMAC) 1345 csi_apply_skip_interval(&csi_skip[fie->index], 1346 &fie->interval); 1347 1348 out: 1349 mutex_unlock(&priv->lock); 1350 return ret; 1351 } 1352 1353 static int csi_get_fmt(struct v4l2_subdev *sd, 1354 struct v4l2_subdev_state *sd_state, 1355 struct v4l2_subdev_format *sdformat) 1356 { 1357 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1358 struct v4l2_mbus_framefmt *fmt; 1359 int ret = 0; 1360 1361 if (sdformat->pad >= CSI_NUM_PADS) 1362 return -EINVAL; 1363 1364 mutex_lock(&priv->lock); 1365 1366 fmt = __csi_get_fmt(priv, sd_state, sdformat->pad, sdformat->which); 1367 if (!fmt) { 1368 ret = -EINVAL; 1369 goto out; 1370 } 1371 1372 sdformat->format = *fmt; 1373 out: 1374 mutex_unlock(&priv->lock); 1375 return ret; 1376 } 1377 1378 static void csi_try_field(struct csi_priv *priv, 1379 struct v4l2_subdev_state *sd_state, 1380 struct v4l2_subdev_format *sdformat) 1381 { 1382 struct v4l2_mbus_framefmt *infmt = 1383 __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sdformat->which); 1384 1385 /* 1386 * no restrictions on sink pad field type except must 1387 * be initialized. 1388 */ 1389 if (sdformat->pad == CSI_SINK_PAD) { 1390 if (sdformat->format.field == V4L2_FIELD_ANY) 1391 sdformat->format.field = V4L2_FIELD_NONE; 1392 return; 1393 } 1394 1395 switch (infmt->field) { 1396 case V4L2_FIELD_SEQ_TB: 1397 case V4L2_FIELD_SEQ_BT: 1398 /* 1399 * If the user requests sequential at the source pad, 1400 * allow it (along with possibly inverting field order). 1401 * Otherwise passthrough the field type. 1402 */ 1403 if (!V4L2_FIELD_IS_SEQUENTIAL(sdformat->format.field)) 1404 sdformat->format.field = infmt->field; 1405 break; 1406 case V4L2_FIELD_ALTERNATE: 1407 /* 1408 * This driver does not support alternate field mode, and 1409 * the CSI captures a whole frame, so the CSI never presents 1410 * alternate mode at its source pads. If user has not 1411 * already requested sequential, translate ALTERNATE at 1412 * sink pad to SEQ_TB or SEQ_BT at the source pad depending 1413 * on input height (assume NTSC BT order if 480 total active 1414 * frame lines, otherwise PAL TB order). 1415 */ 1416 if (!V4L2_FIELD_IS_SEQUENTIAL(sdformat->format.field)) 1417 sdformat->format.field = (infmt->height == 480 / 2) ? 1418 V4L2_FIELD_SEQ_BT : V4L2_FIELD_SEQ_TB; 1419 break; 1420 default: 1421 /* Passthrough for all other input field types */ 1422 sdformat->format.field = infmt->field; 1423 break; 1424 } 1425 } 1426 1427 static void csi_try_fmt(struct csi_priv *priv, 1428 struct v4l2_fwnode_endpoint *upstream_ep, 1429 struct v4l2_subdev_state *sd_state, 1430 struct v4l2_subdev_format *sdformat, 1431 struct v4l2_rect *crop, 1432 struct v4l2_rect *compose, 1433 const struct imx_media_pixfmt **cc) 1434 { 1435 const struct imx_media_pixfmt *incc; 1436 struct v4l2_mbus_framefmt *infmt; 1437 u32 code; 1438 1439 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sdformat->which); 1440 1441 switch (sdformat->pad) { 1442 case CSI_SRC_PAD_DIRECT: 1443 case CSI_SRC_PAD_IDMAC: 1444 incc = imx_media_find_mbus_format(infmt->code, PIXFMT_SEL_ANY); 1445 1446 sdformat->format.width = compose->width; 1447 sdformat->format.height = compose->height; 1448 1449 if (requires_passthrough(upstream_ep, infmt, incc)) { 1450 sdformat->format.code = infmt->code; 1451 *cc = incc; 1452 } else { 1453 enum imx_pixfmt_sel fmt_sel = 1454 (incc->cs == IPUV3_COLORSPACE_YUV) ? 1455 PIXFMT_SEL_YUV : PIXFMT_SEL_RGB; 1456 1457 *cc = imx_media_find_ipu_format(sdformat->format.code, 1458 fmt_sel); 1459 if (!*cc) { 1460 imx_media_enum_ipu_formats(&code, 0, fmt_sel); 1461 *cc = imx_media_find_ipu_format(code, fmt_sel); 1462 sdformat->format.code = (*cc)->codes[0]; 1463 } 1464 } 1465 1466 csi_try_field(priv, sd_state, sdformat); 1467 1468 /* propagate colorimetry from sink */ 1469 sdformat->format.colorspace = infmt->colorspace; 1470 sdformat->format.xfer_func = infmt->xfer_func; 1471 sdformat->format.quantization = infmt->quantization; 1472 sdformat->format.ycbcr_enc = infmt->ycbcr_enc; 1473 1474 break; 1475 case CSI_SINK_PAD: 1476 v4l_bound_align_image(&sdformat->format.width, MIN_W, MAX_W, 1477 W_ALIGN, &sdformat->format.height, 1478 MIN_H, MAX_H, H_ALIGN, S_ALIGN); 1479 1480 *cc = imx_media_find_mbus_format(sdformat->format.code, 1481 PIXFMT_SEL_ANY); 1482 if (!*cc) { 1483 imx_media_enum_mbus_formats(&code, 0, 1484 PIXFMT_SEL_YUV_RGB); 1485 *cc = imx_media_find_mbus_format(code, 1486 PIXFMT_SEL_YUV_RGB); 1487 sdformat->format.code = (*cc)->codes[0]; 1488 } 1489 1490 csi_try_field(priv, sd_state, sdformat); 1491 1492 /* Reset crop and compose rectangles */ 1493 crop->left = 0; 1494 crop->top = 0; 1495 crop->width = sdformat->format.width; 1496 crop->height = sdformat->format.height; 1497 if (sdformat->format.field == V4L2_FIELD_ALTERNATE) 1498 crop->height *= 2; 1499 csi_try_crop(priv, crop, sd_state, &sdformat->format, 1500 upstream_ep); 1501 compose->left = 0; 1502 compose->top = 0; 1503 compose->width = crop->width; 1504 compose->height = crop->height; 1505 1506 break; 1507 } 1508 1509 imx_media_try_colorimetry(&sdformat->format, 1510 priv->active_output_pad == CSI_SRC_PAD_DIRECT); 1511 } 1512 1513 static int csi_set_fmt(struct v4l2_subdev *sd, 1514 struct v4l2_subdev_state *sd_state, 1515 struct v4l2_subdev_format *sdformat) 1516 { 1517 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1518 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1519 const struct imx_media_pixfmt *cc; 1520 struct v4l2_mbus_framefmt *fmt; 1521 struct v4l2_rect *crop, *compose; 1522 int ret; 1523 1524 if (sdformat->pad >= CSI_NUM_PADS) 1525 return -EINVAL; 1526 1527 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1528 if (ret) { 1529 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1530 return ret; 1531 } 1532 1533 mutex_lock(&priv->lock); 1534 1535 if (priv->stream_count > 0) { 1536 ret = -EBUSY; 1537 goto out; 1538 } 1539 1540 crop = __csi_get_crop(priv, sd_state, sdformat->which); 1541 compose = __csi_get_compose(priv, sd_state, sdformat->which); 1542 1543 csi_try_fmt(priv, &upstream_ep, sd_state, sdformat, crop, compose, 1544 &cc); 1545 1546 fmt = __csi_get_fmt(priv, sd_state, sdformat->pad, sdformat->which); 1547 *fmt = sdformat->format; 1548 1549 if (sdformat->pad == CSI_SINK_PAD) { 1550 int pad; 1551 1552 /* propagate format to source pads */ 1553 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) { 1554 const struct imx_media_pixfmt *outcc; 1555 struct v4l2_mbus_framefmt *outfmt; 1556 struct v4l2_subdev_format format; 1557 1558 format.pad = pad; 1559 format.which = sdformat->which; 1560 format.format = sdformat->format; 1561 csi_try_fmt(priv, &upstream_ep, sd_state, &format, 1562 NULL, compose, &outcc); 1563 1564 outfmt = __csi_get_fmt(priv, sd_state, pad, 1565 sdformat->which); 1566 *outfmt = format.format; 1567 1568 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE) 1569 priv->cc[pad] = outcc; 1570 } 1571 } 1572 1573 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE) 1574 priv->cc[sdformat->pad] = cc; 1575 1576 out: 1577 mutex_unlock(&priv->lock); 1578 return ret; 1579 } 1580 1581 static int csi_get_selection(struct v4l2_subdev *sd, 1582 struct v4l2_subdev_state *sd_state, 1583 struct v4l2_subdev_selection *sel) 1584 { 1585 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1586 struct v4l2_mbus_framefmt *infmt; 1587 struct v4l2_rect *crop, *compose; 1588 int ret = 0; 1589 1590 if (sel->pad != CSI_SINK_PAD) 1591 return -EINVAL; 1592 1593 mutex_lock(&priv->lock); 1594 1595 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sel->which); 1596 crop = __csi_get_crop(priv, sd_state, sel->which); 1597 compose = __csi_get_compose(priv, sd_state, sel->which); 1598 1599 switch (sel->target) { 1600 case V4L2_SEL_TGT_CROP_BOUNDS: 1601 sel->r.left = 0; 1602 sel->r.top = 0; 1603 sel->r.width = infmt->width; 1604 sel->r.height = infmt->height; 1605 if (infmt->field == V4L2_FIELD_ALTERNATE) 1606 sel->r.height *= 2; 1607 break; 1608 case V4L2_SEL_TGT_CROP: 1609 sel->r = *crop; 1610 break; 1611 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 1612 sel->r.left = 0; 1613 sel->r.top = 0; 1614 sel->r.width = crop->width; 1615 sel->r.height = crop->height; 1616 break; 1617 case V4L2_SEL_TGT_COMPOSE: 1618 sel->r = *compose; 1619 break; 1620 default: 1621 ret = -EINVAL; 1622 } 1623 1624 mutex_unlock(&priv->lock); 1625 return ret; 1626 } 1627 1628 static int csi_set_scale(u32 *compose, u32 crop, u32 flags) 1629 { 1630 if ((flags & (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE)) == 1631 (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE) && 1632 *compose != crop && *compose != crop / 2) 1633 return -ERANGE; 1634 1635 if (*compose <= crop / 2 || 1636 (*compose < crop * 3 / 4 && !(flags & V4L2_SEL_FLAG_GE)) || 1637 (*compose < crop && (flags & V4L2_SEL_FLAG_LE))) 1638 *compose = crop / 2; 1639 else 1640 *compose = crop; 1641 1642 return 0; 1643 } 1644 1645 static int csi_set_selection(struct v4l2_subdev *sd, 1646 struct v4l2_subdev_state *sd_state, 1647 struct v4l2_subdev_selection *sel) 1648 { 1649 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1650 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1651 struct v4l2_mbus_framefmt *infmt; 1652 struct v4l2_rect *crop, *compose; 1653 int pad, ret; 1654 1655 if (sel->pad != CSI_SINK_PAD) 1656 return -EINVAL; 1657 1658 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1659 if (ret) { 1660 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1661 return ret; 1662 } 1663 1664 mutex_lock(&priv->lock); 1665 1666 if (priv->stream_count > 0) { 1667 ret = -EBUSY; 1668 goto out; 1669 } 1670 1671 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sel->which); 1672 crop = __csi_get_crop(priv, sd_state, sel->which); 1673 compose = __csi_get_compose(priv, sd_state, sel->which); 1674 1675 switch (sel->target) { 1676 case V4L2_SEL_TGT_CROP: 1677 /* 1678 * Modifying the crop rectangle always changes the format on 1679 * the source pads. If the KEEP_CONFIG flag is set, just return 1680 * the current crop rectangle. 1681 */ 1682 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) { 1683 sel->r = priv->crop; 1684 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1685 *crop = sel->r; 1686 goto out; 1687 } 1688 1689 csi_try_crop(priv, &sel->r, sd_state, infmt, &upstream_ep); 1690 1691 *crop = sel->r; 1692 1693 /* Reset scaling to 1:1 */ 1694 compose->width = crop->width; 1695 compose->height = crop->height; 1696 break; 1697 case V4L2_SEL_TGT_COMPOSE: 1698 /* 1699 * Modifying the compose rectangle always changes the format on 1700 * the source pads. If the KEEP_CONFIG flag is set, just return 1701 * the current compose rectangle. 1702 */ 1703 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) { 1704 sel->r = priv->compose; 1705 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1706 *compose = sel->r; 1707 goto out; 1708 } 1709 1710 sel->r.left = 0; 1711 sel->r.top = 0; 1712 ret = csi_set_scale(&sel->r.width, crop->width, sel->flags); 1713 if (ret) 1714 goto out; 1715 ret = csi_set_scale(&sel->r.height, crop->height, sel->flags); 1716 if (ret) 1717 goto out; 1718 1719 *compose = sel->r; 1720 break; 1721 default: 1722 ret = -EINVAL; 1723 goto out; 1724 } 1725 1726 /* Reset source pads to sink compose rectangle */ 1727 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) { 1728 struct v4l2_mbus_framefmt *outfmt; 1729 1730 outfmt = __csi_get_fmt(priv, sd_state, pad, sel->which); 1731 outfmt->width = compose->width; 1732 outfmt->height = compose->height; 1733 } 1734 1735 out: 1736 mutex_unlock(&priv->lock); 1737 return ret; 1738 } 1739 1740 static int csi_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, 1741 struct v4l2_event_subscription *sub) 1742 { 1743 if (sub->type != V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR) 1744 return -EINVAL; 1745 if (sub->id != 0) 1746 return -EINVAL; 1747 1748 return v4l2_event_subscribe(fh, sub, 0, NULL); 1749 } 1750 1751 static int csi_unsubscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, 1752 struct v4l2_event_subscription *sub) 1753 { 1754 return v4l2_event_unsubscribe(fh, sub); 1755 } 1756 1757 static int csi_registered(struct v4l2_subdev *sd) 1758 { 1759 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1760 struct ipu_csi *csi; 1761 int i, ret; 1762 u32 code; 1763 1764 /* get handle to IPU CSI */ 1765 csi = ipu_csi_get(priv->ipu, priv->csi_id); 1766 if (IS_ERR(csi)) { 1767 v4l2_err(&priv->sd, "failed to get CSI%d\n", priv->csi_id); 1768 return PTR_ERR(csi); 1769 } 1770 priv->csi = csi; 1771 1772 for (i = 0; i < CSI_NUM_PADS; i++) { 1773 code = 0; 1774 if (i != CSI_SINK_PAD) 1775 imx_media_enum_ipu_formats(&code, 0, PIXFMT_SEL_YUV); 1776 1777 /* set a default mbus format */ 1778 ret = imx_media_init_mbus_fmt(&priv->format_mbus[i], 1779 IMX_MEDIA_DEF_PIX_WIDTH, 1780 IMX_MEDIA_DEF_PIX_HEIGHT, code, 1781 V4L2_FIELD_NONE, &priv->cc[i]); 1782 if (ret) 1783 goto put_csi; 1784 1785 /* init default frame interval */ 1786 priv->frame_interval[i].numerator = 1; 1787 priv->frame_interval[i].denominator = 30; 1788 } 1789 1790 /* disable frame skipping */ 1791 priv->skip = &csi_skip[0]; 1792 1793 /* init default crop and compose rectangle sizes */ 1794 priv->crop.width = IMX_MEDIA_DEF_PIX_WIDTH; 1795 priv->crop.height = IMX_MEDIA_DEF_PIX_HEIGHT; 1796 priv->compose.width = IMX_MEDIA_DEF_PIX_WIDTH; 1797 priv->compose.height = IMX_MEDIA_DEF_PIX_HEIGHT; 1798 1799 priv->fim = imx_media_fim_init(&priv->sd); 1800 if (IS_ERR(priv->fim)) { 1801 ret = PTR_ERR(priv->fim); 1802 goto put_csi; 1803 } 1804 1805 priv->vdev = imx_media_capture_device_init(priv->sd.dev, &priv->sd, 1806 CSI_SRC_PAD_IDMAC, true); 1807 if (IS_ERR(priv->vdev)) { 1808 ret = PTR_ERR(priv->vdev); 1809 goto free_fim; 1810 } 1811 1812 ret = imx_media_capture_device_register(priv->vdev, 0); 1813 if (ret) 1814 goto remove_vdev; 1815 1816 return 0; 1817 1818 remove_vdev: 1819 imx_media_capture_device_remove(priv->vdev); 1820 free_fim: 1821 if (priv->fim) 1822 imx_media_fim_free(priv->fim); 1823 put_csi: 1824 ipu_csi_put(priv->csi); 1825 return ret; 1826 } 1827 1828 static void csi_unregistered(struct v4l2_subdev *sd) 1829 { 1830 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1831 1832 imx_media_capture_device_unregister(priv->vdev); 1833 imx_media_capture_device_remove(priv->vdev); 1834 1835 if (priv->fim) 1836 imx_media_fim_free(priv->fim); 1837 1838 if (priv->csi) 1839 ipu_csi_put(priv->csi); 1840 } 1841 1842 /* 1843 * The CSI has only one fwnode endpoint, at the sink pad. Verify the 1844 * endpoint belongs to us, and return CSI_SINK_PAD. 1845 */ 1846 static int csi_get_fwnode_pad(struct media_entity *entity, 1847 struct fwnode_endpoint *endpoint) 1848 { 1849 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); 1850 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1851 struct fwnode_handle *csi_port = dev_fwnode(priv->dev); 1852 struct fwnode_handle *csi_ep; 1853 int ret; 1854 1855 csi_ep = fwnode_get_next_child_node(csi_port, NULL); 1856 1857 ret = endpoint->local_fwnode == csi_ep ? CSI_SINK_PAD : -ENXIO; 1858 1859 fwnode_handle_put(csi_ep); 1860 1861 return ret; 1862 } 1863 1864 static const struct media_entity_operations csi_entity_ops = { 1865 .link_setup = csi_link_setup, 1866 .link_validate = v4l2_subdev_link_validate, 1867 .get_fwnode_pad = csi_get_fwnode_pad, 1868 }; 1869 1870 static const struct v4l2_subdev_core_ops csi_core_ops = { 1871 .subscribe_event = csi_subscribe_event, 1872 .unsubscribe_event = csi_unsubscribe_event, 1873 }; 1874 1875 static const struct v4l2_subdev_video_ops csi_video_ops = { 1876 .g_frame_interval = csi_g_frame_interval, 1877 .s_frame_interval = csi_s_frame_interval, 1878 .s_stream = csi_s_stream, 1879 }; 1880 1881 static const struct v4l2_subdev_pad_ops csi_pad_ops = { 1882 .init_cfg = imx_media_init_cfg, 1883 .enum_mbus_code = csi_enum_mbus_code, 1884 .enum_frame_size = csi_enum_frame_size, 1885 .enum_frame_interval = csi_enum_frame_interval, 1886 .get_fmt = csi_get_fmt, 1887 .set_fmt = csi_set_fmt, 1888 .get_selection = csi_get_selection, 1889 .set_selection = csi_set_selection, 1890 .link_validate = csi_link_validate, 1891 }; 1892 1893 static const struct v4l2_subdev_ops csi_subdev_ops = { 1894 .core = &csi_core_ops, 1895 .video = &csi_video_ops, 1896 .pad = &csi_pad_ops, 1897 }; 1898 1899 static const struct v4l2_subdev_internal_ops csi_internal_ops = { 1900 .registered = csi_registered, 1901 .unregistered = csi_unregistered, 1902 }; 1903 1904 static int imx_csi_notify_bound(struct v4l2_async_notifier *notifier, 1905 struct v4l2_subdev *sd, 1906 struct v4l2_async_subdev *asd) 1907 { 1908 struct csi_priv *priv = notifier_to_dev(notifier); 1909 struct media_pad *sink = &priv->sd.entity.pads[CSI_SINK_PAD]; 1910 1911 /* 1912 * If the subdev is a video mux, it must be one of the CSI 1913 * muxes. Mark it as such via its group id. 1914 */ 1915 if (sd->entity.function == MEDIA_ENT_F_VID_MUX) 1916 sd->grp_id = IMX_MEDIA_GRP_ID_CSI_MUX; 1917 1918 return v4l2_create_fwnode_links_to_pad(sd, sink, 0); 1919 } 1920 1921 static const struct v4l2_async_notifier_operations csi_notify_ops = { 1922 .bound = imx_csi_notify_bound, 1923 }; 1924 1925 static int imx_csi_async_register(struct csi_priv *priv) 1926 { 1927 struct v4l2_async_subdev *asd = NULL; 1928 struct fwnode_handle *ep; 1929 unsigned int port; 1930 int ret; 1931 1932 v4l2_async_nf_init(&priv->notifier); 1933 1934 /* get this CSI's port id */ 1935 ret = fwnode_property_read_u32(dev_fwnode(priv->dev), "reg", &port); 1936 if (ret < 0) 1937 return ret; 1938 1939 ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(priv->dev->parent), 1940 port, 0, 1941 FWNODE_GRAPH_ENDPOINT_NEXT); 1942 if (ep) { 1943 asd = v4l2_async_nf_add_fwnode_remote(&priv->notifier, ep, 1944 struct v4l2_async_subdev); 1945 1946 fwnode_handle_put(ep); 1947 1948 if (IS_ERR(asd)) { 1949 ret = PTR_ERR(asd); 1950 /* OK if asd already exists */ 1951 if (ret != -EEXIST) 1952 return ret; 1953 } 1954 } 1955 1956 priv->notifier.ops = &csi_notify_ops; 1957 1958 ret = v4l2_async_subdev_nf_register(&priv->sd, &priv->notifier); 1959 if (ret) 1960 return ret; 1961 1962 return v4l2_async_register_subdev(&priv->sd); 1963 } 1964 1965 static int imx_csi_probe(struct platform_device *pdev) 1966 { 1967 struct ipu_client_platformdata *pdata; 1968 struct pinctrl *pinctrl; 1969 struct csi_priv *priv; 1970 int i, ret; 1971 1972 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 1973 if (!priv) 1974 return -ENOMEM; 1975 1976 platform_set_drvdata(pdev, &priv->sd); 1977 priv->dev = &pdev->dev; 1978 1979 ret = dma_set_coherent_mask(priv->dev, DMA_BIT_MASK(32)); 1980 if (ret) 1981 return ret; 1982 1983 /* get parent IPU */ 1984 priv->ipu = dev_get_drvdata(priv->dev->parent); 1985 1986 /* get our CSI id */ 1987 pdata = priv->dev->platform_data; 1988 priv->csi_id = pdata->csi; 1989 priv->smfc_id = (priv->csi_id == 0) ? 0 : 2; 1990 1991 priv->active_output_pad = CSI_SRC_PAD_IDMAC; 1992 1993 timer_setup(&priv->eof_timeout_timer, csi_idmac_eof_timeout, 0); 1994 spin_lock_init(&priv->irqlock); 1995 1996 v4l2_subdev_init(&priv->sd, &csi_subdev_ops); 1997 v4l2_set_subdevdata(&priv->sd, priv); 1998 priv->sd.internal_ops = &csi_internal_ops; 1999 priv->sd.entity.ops = &csi_entity_ops; 2000 priv->sd.entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER; 2001 priv->sd.dev = &pdev->dev; 2002 priv->sd.fwnode = of_fwnode_handle(pdata->of_node); 2003 priv->sd.owner = THIS_MODULE; 2004 priv->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; 2005 priv->sd.grp_id = priv->csi_id ? 2006 IMX_MEDIA_GRP_ID_IPU_CSI1 : IMX_MEDIA_GRP_ID_IPU_CSI0; 2007 imx_media_grp_id_to_sd_name(priv->sd.name, sizeof(priv->sd.name), 2008 priv->sd.grp_id, ipu_get_num(priv->ipu)); 2009 2010 for (i = 0; i < CSI_NUM_PADS; i++) 2011 priv->pad[i].flags = (i == CSI_SINK_PAD) ? 2012 MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE; 2013 2014 ret = media_entity_pads_init(&priv->sd.entity, CSI_NUM_PADS, 2015 priv->pad); 2016 if (ret) 2017 return ret; 2018 2019 mutex_init(&priv->lock); 2020 2021 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0); 2022 priv->sd.ctrl_handler = &priv->ctrl_hdlr; 2023 2024 /* 2025 * The IPUv3 driver did not assign an of_node to this 2026 * device. As a result, pinctrl does not automatically 2027 * configure our pin groups, so we need to do that manually 2028 * here, after setting this device's of_node. 2029 */ 2030 priv->dev->of_node = pdata->of_node; 2031 pinctrl = devm_pinctrl_get_select_default(priv->dev); 2032 if (IS_ERR(pinctrl)) { 2033 ret = PTR_ERR(pinctrl); 2034 dev_dbg(priv->dev, 2035 "devm_pinctrl_get_select_default() failed: %d\n", ret); 2036 if (ret != -ENODEV) 2037 goto free; 2038 } 2039 2040 ret = imx_csi_async_register(priv); 2041 if (ret) 2042 goto cleanup; 2043 2044 return 0; 2045 2046 cleanup: 2047 v4l2_async_nf_unregister(&priv->notifier); 2048 v4l2_async_nf_cleanup(&priv->notifier); 2049 free: 2050 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 2051 mutex_destroy(&priv->lock); 2052 return ret; 2053 } 2054 2055 static int imx_csi_remove(struct platform_device *pdev) 2056 { 2057 struct v4l2_subdev *sd = platform_get_drvdata(pdev); 2058 struct csi_priv *priv = sd_to_dev(sd); 2059 2060 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 2061 mutex_destroy(&priv->lock); 2062 v4l2_async_nf_unregister(&priv->notifier); 2063 v4l2_async_nf_cleanup(&priv->notifier); 2064 v4l2_async_unregister_subdev(sd); 2065 media_entity_cleanup(&sd->entity); 2066 2067 return 0; 2068 } 2069 2070 static const struct platform_device_id imx_csi_ids[] = { 2071 { .name = "imx-ipuv3-csi" }, 2072 { }, 2073 }; 2074 MODULE_DEVICE_TABLE(platform, imx_csi_ids); 2075 2076 static struct platform_driver imx_csi_driver = { 2077 .probe = imx_csi_probe, 2078 .remove = imx_csi_remove, 2079 .id_table = imx_csi_ids, 2080 .driver = { 2081 .name = "imx-ipuv3-csi", 2082 }, 2083 }; 2084 module_platform_driver(imx_csi_driver); 2085 2086 MODULE_DESCRIPTION("i.MX CSI subdev driver"); 2087 MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>"); 2088 MODULE_LICENSE("GPL"); 2089