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 176 37 #define MIN_H 144 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 /* the video device at IDMAC output pad */ 62 struct imx_media_video_dev *vdev; 63 struct imx_media_fim *fim; 64 int csi_id; 65 int smfc_id; 66 67 /* lock to protect all members below */ 68 struct mutex lock; 69 70 int active_output_pad; 71 72 struct ipuv3_channel *idmac_ch; 73 struct ipu_smfc *smfc; 74 struct ipu_csi *csi; 75 76 struct v4l2_mbus_framefmt format_mbus[CSI_NUM_PADS]; 77 const struct imx_media_pixfmt *cc[CSI_NUM_PADS]; 78 struct v4l2_fract frame_interval[CSI_NUM_PADS]; 79 struct v4l2_rect crop; 80 struct v4l2_rect compose; 81 const struct csi_skip_desc *skip; 82 83 /* active vb2 buffers to send to video dev sink */ 84 struct imx_media_buffer *active_vb2_buf[2]; 85 struct imx_media_dma_buf underrun_buf; 86 87 int ipu_buf_num; /* ipu double buffer index: 0-1 */ 88 89 /* the sink for the captured frames */ 90 struct media_entity *sink; 91 enum ipu_csi_dest dest; 92 /* the source subdev */ 93 struct v4l2_subdev *src_sd; 94 95 /* the mipi virtual channel number at link validate */ 96 int vc_num; 97 98 /* the upstream endpoint CSI is receiving from */ 99 struct v4l2_fwnode_endpoint upstream_ep; 100 101 spinlock_t irqlock; /* protect eof_irq handler */ 102 struct timer_list eof_timeout_timer; 103 int eof_irq; 104 int nfb4eof_irq; 105 106 struct v4l2_ctrl_handler ctrl_hdlr; 107 108 int stream_count; /* streaming counter */ 109 u32 frame_sequence; /* frame sequence counter */ 110 bool last_eof; /* waiting for last EOF at stream off */ 111 bool nfb4eof; /* NFB4EOF encountered during streaming */ 112 bool interweave_swap; /* swap top/bottom lines when interweaving */ 113 struct completion last_eof_comp; 114 }; 115 116 static inline struct csi_priv *sd_to_dev(struct v4l2_subdev *sdev) 117 { 118 return container_of(sdev, struct csi_priv, sd); 119 } 120 121 static inline bool is_parallel_bus(struct v4l2_fwnode_endpoint *ep) 122 { 123 return ep->bus_type != V4L2_MBUS_CSI2_DPHY; 124 } 125 126 static inline bool is_parallel_16bit_bus(struct v4l2_fwnode_endpoint *ep) 127 { 128 return is_parallel_bus(ep) && ep->bus.parallel.bus_width >= 16; 129 } 130 131 /* 132 * Check for conditions that require the IPU to handle the 133 * data internally as generic data, aka passthrough mode: 134 * - raw bayer media bus formats, or 135 * - the CSI is receiving from a 16-bit parallel bus, or 136 * - the CSI is receiving from an 8-bit parallel bus and the incoming 137 * media bus format is other than UYVY8_2X8/YUYV8_2X8. 138 */ 139 static inline bool requires_passthrough(struct v4l2_fwnode_endpoint *ep, 140 struct v4l2_mbus_framefmt *infmt, 141 const struct imx_media_pixfmt *incc) 142 { 143 return incc->bayer || is_parallel_16bit_bus(ep) || 144 (is_parallel_bus(ep) && 145 infmt->code != MEDIA_BUS_FMT_UYVY8_2X8 && 146 infmt->code != MEDIA_BUS_FMT_YUYV8_2X8); 147 } 148 149 /* 150 * Parses the fwnode endpoint from the source pad of the entity 151 * connected to this CSI. This will either be the entity directly 152 * upstream from the CSI-2 receiver, directly upstream from the 153 * video mux, or directly upstream from the CSI itself. The endpoint 154 * is needed to determine the bus type and bus config coming into 155 * the CSI. 156 */ 157 static int csi_get_upstream_endpoint(struct csi_priv *priv, 158 struct v4l2_fwnode_endpoint *ep) 159 { 160 struct device_node *endpoint, *port; 161 struct media_entity *src; 162 struct v4l2_subdev *sd; 163 struct media_pad *pad; 164 165 if (!IS_ENABLED(CONFIG_OF)) 166 return -ENXIO; 167 168 if (!priv->src_sd) 169 return -EPIPE; 170 171 sd = priv->src_sd; 172 src = &sd->entity; 173 174 if (src->function == MEDIA_ENT_F_VID_MUX) { 175 /* 176 * CSI is connected directly to video mux, skip up to 177 * CSI-2 receiver if it is in the path, otherwise stay 178 * with video mux. 179 */ 180 sd = imx_media_pipeline_subdev(src, IMX_MEDIA_GRP_ID_CSI2, 181 true); 182 if (!IS_ERR(sd)) 183 src = &sd->entity; 184 } 185 186 /* 187 * If the source is neither the video mux nor the CSI-2 receiver, 188 * get the source pad directly upstream from CSI itself. 189 */ 190 if (src->function != MEDIA_ENT_F_VID_MUX && 191 sd->grp_id != IMX_MEDIA_GRP_ID_CSI2) 192 src = &priv->sd.entity; 193 194 /* get source pad of entity directly upstream from src */ 195 pad = imx_media_pipeline_pad(src, 0, 0, true); 196 if (!pad) 197 return -ENODEV; 198 199 sd = media_entity_to_v4l2_subdev(pad->entity); 200 201 /* 202 * NOTE: this assumes an OF-graph port id is the same as a 203 * media pad index. 204 */ 205 port = of_graph_get_port_by_id(sd->dev->of_node, pad->index); 206 if (!port) 207 return -ENODEV; 208 209 endpoint = of_get_next_child(port, NULL); 210 of_node_put(port); 211 if (!endpoint) 212 return -ENODEV; 213 214 v4l2_fwnode_endpoint_parse(of_fwnode_handle(endpoint), ep); 215 of_node_put(endpoint); 216 217 return 0; 218 } 219 220 static void csi_idmac_put_ipu_resources(struct csi_priv *priv) 221 { 222 if (priv->idmac_ch) 223 ipu_idmac_put(priv->idmac_ch); 224 priv->idmac_ch = NULL; 225 226 if (priv->smfc) 227 ipu_smfc_put(priv->smfc); 228 priv->smfc = NULL; 229 } 230 231 static int csi_idmac_get_ipu_resources(struct csi_priv *priv) 232 { 233 int ch_num, ret; 234 struct ipu_smfc *smfc; 235 struct ipuv3_channel *idmac_ch; 236 237 ch_num = IPUV3_CHANNEL_CSI0 + priv->smfc_id; 238 239 smfc = ipu_smfc_get(priv->ipu, ch_num); 240 if (IS_ERR(smfc)) { 241 v4l2_err(&priv->sd, "failed to get SMFC\n"); 242 ret = PTR_ERR(smfc); 243 goto out; 244 } 245 priv->smfc = smfc; 246 247 idmac_ch = ipu_idmac_get(priv->ipu, ch_num); 248 if (IS_ERR(idmac_ch)) { 249 v4l2_err(&priv->sd, "could not get IDMAC channel %u\n", 250 ch_num); 251 ret = PTR_ERR(idmac_ch); 252 goto out; 253 } 254 priv->idmac_ch = idmac_ch; 255 256 return 0; 257 out: 258 csi_idmac_put_ipu_resources(priv); 259 return ret; 260 } 261 262 static void csi_vb2_buf_done(struct csi_priv *priv) 263 { 264 struct imx_media_video_dev *vdev = priv->vdev; 265 struct imx_media_buffer *done, *next; 266 struct vb2_buffer *vb; 267 dma_addr_t phys; 268 269 done = priv->active_vb2_buf[priv->ipu_buf_num]; 270 if (done) { 271 done->vbuf.field = vdev->fmt.fmt.pix.field; 272 done->vbuf.sequence = priv->frame_sequence; 273 vb = &done->vbuf.vb2_buf; 274 vb->timestamp = ktime_get_ns(); 275 vb2_buffer_done(vb, priv->nfb4eof ? 276 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); 277 } 278 279 priv->frame_sequence++; 280 priv->nfb4eof = false; 281 282 /* get next queued buffer */ 283 next = imx_media_capture_device_next_buf(vdev); 284 if (next) { 285 phys = vb2_dma_contig_plane_dma_addr(&next->vbuf.vb2_buf, 0); 286 priv->active_vb2_buf[priv->ipu_buf_num] = next; 287 } else { 288 phys = priv->underrun_buf.phys; 289 priv->active_vb2_buf[priv->ipu_buf_num] = NULL; 290 } 291 292 if (ipu_idmac_buffer_is_ready(priv->idmac_ch, priv->ipu_buf_num)) 293 ipu_idmac_clear_buffer(priv->idmac_ch, priv->ipu_buf_num); 294 295 if (priv->interweave_swap) 296 phys += vdev->fmt.fmt.pix.bytesperline; 297 298 ipu_cpmem_set_buffer(priv->idmac_ch, priv->ipu_buf_num, phys); 299 } 300 301 static irqreturn_t csi_idmac_eof_interrupt(int irq, void *dev_id) 302 { 303 struct csi_priv *priv = dev_id; 304 305 spin_lock(&priv->irqlock); 306 307 if (priv->last_eof) { 308 complete(&priv->last_eof_comp); 309 priv->last_eof = false; 310 goto unlock; 311 } 312 313 if (priv->fim) 314 /* call frame interval monitor */ 315 imx_media_fim_eof_monitor(priv->fim, ktime_get()); 316 317 csi_vb2_buf_done(priv); 318 319 /* select new IPU buf */ 320 ipu_idmac_select_buffer(priv->idmac_ch, priv->ipu_buf_num); 321 /* toggle IPU double-buffer index */ 322 priv->ipu_buf_num ^= 1; 323 324 /* bump the EOF timeout timer */ 325 mod_timer(&priv->eof_timeout_timer, 326 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT)); 327 328 unlock: 329 spin_unlock(&priv->irqlock); 330 return IRQ_HANDLED; 331 } 332 333 static irqreturn_t csi_idmac_nfb4eof_interrupt(int irq, void *dev_id) 334 { 335 struct csi_priv *priv = dev_id; 336 337 spin_lock(&priv->irqlock); 338 339 /* 340 * this is not an unrecoverable error, just mark 341 * the next captured frame with vb2 error flag. 342 */ 343 priv->nfb4eof = true; 344 345 v4l2_err(&priv->sd, "NFB4EOF\n"); 346 347 spin_unlock(&priv->irqlock); 348 349 return IRQ_HANDLED; 350 } 351 352 /* 353 * EOF timeout timer function. This is an unrecoverable condition 354 * without a stream restart. 355 */ 356 static void csi_idmac_eof_timeout(struct timer_list *t) 357 { 358 struct csi_priv *priv = from_timer(priv, t, eof_timeout_timer); 359 struct imx_media_video_dev *vdev = priv->vdev; 360 361 v4l2_err(&priv->sd, "EOF timeout\n"); 362 363 /* signal a fatal error to capture device */ 364 imx_media_capture_device_error(vdev); 365 } 366 367 static void csi_idmac_setup_vb2_buf(struct csi_priv *priv, dma_addr_t *phys) 368 { 369 struct imx_media_video_dev *vdev = priv->vdev; 370 struct imx_media_buffer *buf; 371 int i; 372 373 for (i = 0; i < 2; i++) { 374 buf = imx_media_capture_device_next_buf(vdev); 375 if (buf) { 376 priv->active_vb2_buf[i] = buf; 377 phys[i] = vb2_dma_contig_plane_dma_addr( 378 &buf->vbuf.vb2_buf, 0); 379 } else { 380 priv->active_vb2_buf[i] = NULL; 381 phys[i] = priv->underrun_buf.phys; 382 } 383 } 384 } 385 386 static void csi_idmac_unsetup_vb2_buf(struct csi_priv *priv, 387 enum vb2_buffer_state return_status) 388 { 389 struct imx_media_buffer *buf; 390 int i; 391 392 /* return any remaining active frames with return_status */ 393 for (i = 0; i < 2; i++) { 394 buf = priv->active_vb2_buf[i]; 395 if (buf) { 396 struct vb2_buffer *vb = &buf->vbuf.vb2_buf; 397 398 vb->timestamp = ktime_get_ns(); 399 vb2_buffer_done(vb, return_status); 400 } 401 } 402 } 403 404 /* init the SMFC IDMAC channel */ 405 static int csi_idmac_setup_channel(struct csi_priv *priv) 406 { 407 struct imx_media_video_dev *vdev = priv->vdev; 408 const struct imx_media_pixfmt *incc; 409 struct v4l2_mbus_framefmt *infmt; 410 struct v4l2_mbus_framefmt *outfmt; 411 bool passthrough, interweave; 412 struct ipu_image image; 413 u32 passthrough_bits; 414 u32 passthrough_cycles; 415 dma_addr_t phys[2]; 416 u32 burst_size; 417 int ret; 418 419 infmt = &priv->format_mbus[CSI_SINK_PAD]; 420 incc = priv->cc[CSI_SINK_PAD]; 421 outfmt = &priv->format_mbus[CSI_SRC_PAD_IDMAC]; 422 423 ipu_cpmem_zero(priv->idmac_ch); 424 425 memset(&image, 0, sizeof(image)); 426 image.pix = vdev->fmt.fmt.pix; 427 image.rect = vdev->compose; 428 429 csi_idmac_setup_vb2_buf(priv, phys); 430 431 image.phys0 = phys[0]; 432 image.phys1 = phys[1]; 433 434 passthrough = requires_passthrough(&priv->upstream_ep, infmt, incc); 435 passthrough_cycles = 1; 436 437 /* 438 * If the field type at capture interface is interlaced, and 439 * the output IDMAC pad is sequential, enable interweave at 440 * the IDMAC output channel. 441 */ 442 interweave = V4L2_FIELD_IS_INTERLACED(image.pix.field) && 443 V4L2_FIELD_IS_SEQUENTIAL(outfmt->field); 444 priv->interweave_swap = interweave && 445 image.pix.field == V4L2_FIELD_INTERLACED_BT; 446 447 switch (image.pix.pixelformat) { 448 case V4L2_PIX_FMT_SBGGR8: 449 case V4L2_PIX_FMT_SGBRG8: 450 case V4L2_PIX_FMT_SGRBG8: 451 case V4L2_PIX_FMT_SRGGB8: 452 case V4L2_PIX_FMT_GREY: 453 burst_size = 16; 454 passthrough_bits = 8; 455 break; 456 case V4L2_PIX_FMT_SBGGR16: 457 case V4L2_PIX_FMT_SGBRG16: 458 case V4L2_PIX_FMT_SGRBG16: 459 case V4L2_PIX_FMT_SRGGB16: 460 case V4L2_PIX_FMT_Y16: 461 burst_size = 8; 462 passthrough_bits = 16; 463 break; 464 case V4L2_PIX_FMT_YUV420: 465 case V4L2_PIX_FMT_YVU420: 466 case V4L2_PIX_FMT_NV12: 467 burst_size = (image.pix.width & 0x3f) ? 468 ((image.pix.width & 0x1f) ? 469 ((image.pix.width & 0xf) ? 8 : 16) : 32) : 64; 470 passthrough_bits = 16; 471 /* 472 * Skip writing U and V components to odd rows (but not 473 * when enabling IDMAC interweaving, they are incompatible). 474 */ 475 if (!interweave) 476 ipu_cpmem_skip_odd_chroma_rows(priv->idmac_ch); 477 break; 478 case V4L2_PIX_FMT_YUYV: 479 case V4L2_PIX_FMT_UYVY: 480 burst_size = (image.pix.width & 0x1f) ? 481 ((image.pix.width & 0xf) ? 8 : 16) : 32; 482 passthrough_bits = 16; 483 break; 484 case V4L2_PIX_FMT_RGB565: 485 if (passthrough) { 486 burst_size = 16; 487 passthrough_bits = 8; 488 passthrough_cycles = incc->cycles; 489 break; 490 } 491 /* fallthrough - non-passthrough RGB565 (CSI-2 bus) */ 492 default: 493 burst_size = (image.pix.width & 0xf) ? 8 : 16; 494 passthrough_bits = 16; 495 break; 496 } 497 498 if (passthrough) { 499 if (priv->interweave_swap) { 500 /* start interweave scan at 1st top line (2nd line) */ 501 image.phys0 += image.pix.bytesperline; 502 image.phys1 += image.pix.bytesperline; 503 } 504 505 ipu_cpmem_set_resolution(priv->idmac_ch, 506 image.rect.width * passthrough_cycles, 507 image.rect.height); 508 ipu_cpmem_set_stride(priv->idmac_ch, image.pix.bytesperline); 509 ipu_cpmem_set_buffer(priv->idmac_ch, 0, image.phys0); 510 ipu_cpmem_set_buffer(priv->idmac_ch, 1, image.phys1); 511 ipu_cpmem_set_format_passthrough(priv->idmac_ch, 512 passthrough_bits); 513 } else { 514 if (priv->interweave_swap) { 515 /* start interweave scan at 1st top line (2nd line) */ 516 image.rect.top = 1; 517 } 518 519 ret = ipu_cpmem_set_image(priv->idmac_ch, &image); 520 if (ret) 521 goto unsetup_vb2; 522 } 523 524 ipu_cpmem_set_burstsize(priv->idmac_ch, burst_size); 525 526 /* 527 * Set the channel for the direct CSI-->memory via SMFC 528 * use-case to very high priority, by enabling the watermark 529 * signal in the SMFC, enabling WM in the channel, and setting 530 * the channel priority to high. 531 * 532 * Refer to the i.mx6 rev. D TRM Table 36-8: Calculated priority 533 * value. 534 * 535 * The WM's are set very low by intention here to ensure that 536 * the SMFC FIFOs do not overflow. 537 */ 538 ipu_smfc_set_watermark(priv->smfc, 0x02, 0x01); 539 ipu_cpmem_set_high_priority(priv->idmac_ch); 540 ipu_idmac_enable_watermark(priv->idmac_ch, true); 541 ipu_cpmem_set_axi_id(priv->idmac_ch, 0); 542 543 burst_size = passthrough ? 544 (burst_size >> 3) - 1 : (burst_size >> 2) - 1; 545 546 ipu_smfc_set_burstsize(priv->smfc, burst_size); 547 548 if (interweave) 549 ipu_cpmem_interlaced_scan(priv->idmac_ch, 550 priv->interweave_swap ? 551 -image.pix.bytesperline : 552 image.pix.bytesperline, 553 image.pix.pixelformat); 554 555 ipu_idmac_set_double_buffer(priv->idmac_ch, true); 556 557 return 0; 558 559 unsetup_vb2: 560 csi_idmac_unsetup_vb2_buf(priv, VB2_BUF_STATE_QUEUED); 561 return ret; 562 } 563 564 static void csi_idmac_unsetup(struct csi_priv *priv, 565 enum vb2_buffer_state state) 566 { 567 ipu_idmac_disable_channel(priv->idmac_ch); 568 ipu_smfc_disable(priv->smfc); 569 570 csi_idmac_unsetup_vb2_buf(priv, state); 571 } 572 573 static int csi_idmac_setup(struct csi_priv *priv) 574 { 575 int ret; 576 577 ret = csi_idmac_setup_channel(priv); 578 if (ret) 579 return ret; 580 581 ipu_cpmem_dump(priv->idmac_ch); 582 ipu_dump(priv->ipu); 583 584 ipu_smfc_enable(priv->smfc); 585 586 /* set buffers ready */ 587 ipu_idmac_select_buffer(priv->idmac_ch, 0); 588 ipu_idmac_select_buffer(priv->idmac_ch, 1); 589 590 /* enable the channels */ 591 ipu_idmac_enable_channel(priv->idmac_ch); 592 593 return 0; 594 } 595 596 static int csi_idmac_start(struct csi_priv *priv) 597 { 598 struct imx_media_video_dev *vdev = priv->vdev; 599 struct v4l2_pix_format *outfmt; 600 int ret; 601 602 ret = csi_idmac_get_ipu_resources(priv); 603 if (ret) 604 return ret; 605 606 ipu_smfc_map_channel(priv->smfc, priv->csi_id, priv->vc_num); 607 608 outfmt = &vdev->fmt.fmt.pix; 609 610 ret = imx_media_alloc_dma_buf(priv->dev, &priv->underrun_buf, 611 outfmt->sizeimage); 612 if (ret) 613 goto out_put_ipu; 614 615 priv->ipu_buf_num = 0; 616 617 /* init EOF completion waitq */ 618 init_completion(&priv->last_eof_comp); 619 priv->frame_sequence = 0; 620 priv->last_eof = false; 621 priv->nfb4eof = false; 622 623 ret = csi_idmac_setup(priv); 624 if (ret) { 625 v4l2_err(&priv->sd, "csi_idmac_setup failed: %d\n", ret); 626 goto out_free_dma_buf; 627 } 628 629 priv->nfb4eof_irq = ipu_idmac_channel_irq(priv->ipu, 630 priv->idmac_ch, 631 IPU_IRQ_NFB4EOF); 632 ret = devm_request_irq(priv->dev, priv->nfb4eof_irq, 633 csi_idmac_nfb4eof_interrupt, 0, 634 "imx-smfc-nfb4eof", priv); 635 if (ret) { 636 v4l2_err(&priv->sd, 637 "Error registering NFB4EOF irq: %d\n", ret); 638 goto out_unsetup; 639 } 640 641 priv->eof_irq = ipu_idmac_channel_irq(priv->ipu, priv->idmac_ch, 642 IPU_IRQ_EOF); 643 644 ret = devm_request_irq(priv->dev, priv->eof_irq, 645 csi_idmac_eof_interrupt, 0, 646 "imx-smfc-eof", priv); 647 if (ret) { 648 v4l2_err(&priv->sd, 649 "Error registering eof irq: %d\n", ret); 650 goto out_free_nfb4eof_irq; 651 } 652 653 /* start the EOF timeout timer */ 654 mod_timer(&priv->eof_timeout_timer, 655 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT)); 656 657 return 0; 658 659 out_free_nfb4eof_irq: 660 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv); 661 out_unsetup: 662 csi_idmac_unsetup(priv, VB2_BUF_STATE_QUEUED); 663 out_free_dma_buf: 664 imx_media_free_dma_buf(priv->dev, &priv->underrun_buf); 665 out_put_ipu: 666 csi_idmac_put_ipu_resources(priv); 667 return ret; 668 } 669 670 static void csi_idmac_wait_last_eof(struct csi_priv *priv) 671 { 672 unsigned long flags; 673 int ret; 674 675 /* mark next EOF interrupt as the last before stream off */ 676 spin_lock_irqsave(&priv->irqlock, flags); 677 priv->last_eof = true; 678 spin_unlock_irqrestore(&priv->irqlock, flags); 679 680 /* 681 * and then wait for interrupt handler to mark completion. 682 */ 683 ret = wait_for_completion_timeout( 684 &priv->last_eof_comp, msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT)); 685 if (ret == 0) 686 v4l2_warn(&priv->sd, "wait last EOF timeout\n"); 687 } 688 689 static void csi_idmac_stop(struct csi_priv *priv) 690 { 691 devm_free_irq(priv->dev, priv->eof_irq, priv); 692 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv); 693 694 csi_idmac_unsetup(priv, VB2_BUF_STATE_ERROR); 695 696 imx_media_free_dma_buf(priv->dev, &priv->underrun_buf); 697 698 /* cancel the EOF timeout timer */ 699 del_timer_sync(&priv->eof_timeout_timer); 700 701 csi_idmac_put_ipu_resources(priv); 702 } 703 704 /* Update the CSI whole sensor and active windows */ 705 static int csi_setup(struct csi_priv *priv) 706 { 707 struct v4l2_mbus_framefmt *infmt, *outfmt; 708 const struct imx_media_pixfmt *incc; 709 struct v4l2_mbus_config mbus_cfg; 710 struct v4l2_mbus_framefmt if_fmt; 711 struct v4l2_rect crop; 712 713 infmt = &priv->format_mbus[CSI_SINK_PAD]; 714 incc = priv->cc[CSI_SINK_PAD]; 715 outfmt = &priv->format_mbus[priv->active_output_pad]; 716 717 /* compose mbus_config from the upstream endpoint */ 718 mbus_cfg.type = priv->upstream_ep.bus_type; 719 mbus_cfg.flags = is_parallel_bus(&priv->upstream_ep) ? 720 priv->upstream_ep.bus.parallel.flags : 721 priv->upstream_ep.bus.mipi_csi2.flags; 722 723 if_fmt = *infmt; 724 crop = priv->crop; 725 726 /* 727 * if cycles is set, we need to handle this over multiple cycles as 728 * generic/bayer data 729 */ 730 if (is_parallel_bus(&priv->upstream_ep) && incc->cycles) { 731 if_fmt.width *= incc->cycles; 732 crop.width *= incc->cycles; 733 } 734 735 ipu_csi_set_window(priv->csi, &crop); 736 737 ipu_csi_set_downsize(priv->csi, 738 priv->crop.width == 2 * priv->compose.width, 739 priv->crop.height == 2 * priv->compose.height); 740 741 ipu_csi_init_interface(priv->csi, &mbus_cfg, &if_fmt, outfmt); 742 743 ipu_csi_set_dest(priv->csi, priv->dest); 744 745 if (priv->dest == IPU_CSI_DEST_IDMAC) 746 ipu_csi_set_skip_smfc(priv->csi, priv->skip->skip_smfc, 747 priv->skip->max_ratio - 1, 0); 748 749 ipu_csi_dump(priv->csi); 750 751 return 0; 752 } 753 754 static int csi_start(struct csi_priv *priv) 755 { 756 struct v4l2_fract *output_fi; 757 int ret; 758 759 output_fi = &priv->frame_interval[priv->active_output_pad]; 760 761 /* start upstream */ 762 ret = v4l2_subdev_call(priv->src_sd, video, s_stream, 1); 763 ret = (ret && ret != -ENOIOCTLCMD) ? ret : 0; 764 if (ret) 765 return ret; 766 767 if (priv->dest == IPU_CSI_DEST_IDMAC) { 768 ret = csi_idmac_start(priv); 769 if (ret) 770 goto stop_upstream; 771 } 772 773 ret = csi_setup(priv); 774 if (ret) 775 goto idmac_stop; 776 777 /* start the frame interval monitor */ 778 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC) { 779 ret = imx_media_fim_set_stream(priv->fim, output_fi, true); 780 if (ret) 781 goto idmac_stop; 782 } 783 784 ret = ipu_csi_enable(priv->csi); 785 if (ret) { 786 v4l2_err(&priv->sd, "CSI enable error: %d\n", ret); 787 goto fim_off; 788 } 789 790 return 0; 791 792 fim_off: 793 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC) 794 imx_media_fim_set_stream(priv->fim, NULL, false); 795 idmac_stop: 796 if (priv->dest == IPU_CSI_DEST_IDMAC) 797 csi_idmac_stop(priv); 798 stop_upstream: 799 v4l2_subdev_call(priv->src_sd, video, s_stream, 0); 800 return ret; 801 } 802 803 static void csi_stop(struct csi_priv *priv) 804 { 805 if (priv->dest == IPU_CSI_DEST_IDMAC) 806 csi_idmac_wait_last_eof(priv); 807 808 /* 809 * Disable the CSI asap, after syncing with the last EOF. 810 * Doing so after the IDMA channel is disabled has shown to 811 * create hard system-wide hangs. 812 */ 813 ipu_csi_disable(priv->csi); 814 815 /* stop upstream */ 816 v4l2_subdev_call(priv->src_sd, video, s_stream, 0); 817 818 if (priv->dest == IPU_CSI_DEST_IDMAC) { 819 csi_idmac_stop(priv); 820 821 /* stop the frame interval monitor */ 822 if (priv->fim) 823 imx_media_fim_set_stream(priv->fim, NULL, false); 824 } 825 } 826 827 static const struct csi_skip_desc csi_skip[12] = { 828 { 1, 1, 0x00 }, /* Keep all frames */ 829 { 5, 6, 0x10 }, /* Skip every sixth frame */ 830 { 4, 5, 0x08 }, /* Skip every fifth frame */ 831 { 3, 4, 0x04 }, /* Skip every fourth frame */ 832 { 2, 3, 0x02 }, /* Skip every third frame */ 833 { 3, 5, 0x0a }, /* Skip frames 1 and 3 of every 5 */ 834 { 1, 2, 0x01 }, /* Skip every second frame */ 835 { 2, 5, 0x0b }, /* Keep frames 1 and 4 of every 5 */ 836 { 1, 3, 0x03 }, /* Keep one in three frames */ 837 { 1, 4, 0x07 }, /* Keep one in four frames */ 838 { 1, 5, 0x0f }, /* Keep one in five frames */ 839 { 1, 6, 0x1f }, /* Keep one in six frames */ 840 }; 841 842 static void csi_apply_skip_interval(const struct csi_skip_desc *skip, 843 struct v4l2_fract *interval) 844 { 845 unsigned int div; 846 847 interval->numerator *= skip->max_ratio; 848 interval->denominator *= skip->keep; 849 850 /* Reduce fraction to lowest terms */ 851 div = gcd(interval->numerator, interval->denominator); 852 if (div > 1) { 853 interval->numerator /= div; 854 interval->denominator /= div; 855 } 856 } 857 858 /* 859 * Find the skip pattern to produce the output frame interval closest to the 860 * requested one, for the given input frame interval. Updates the output frame 861 * interval to the exact value. 862 */ 863 static const struct csi_skip_desc *csi_find_best_skip(struct v4l2_fract *in, 864 struct v4l2_fract *out) 865 { 866 const struct csi_skip_desc *skip = &csi_skip[0], *best_skip = skip; 867 u32 min_err = UINT_MAX; 868 u64 want_us; 869 int i; 870 871 /* Default to 1:1 ratio */ 872 if (out->numerator == 0 || out->denominator == 0 || 873 in->numerator == 0 || in->denominator == 0) { 874 *out = *in; 875 return best_skip; 876 } 877 878 want_us = div_u64((u64)USEC_PER_SEC * out->numerator, out->denominator); 879 880 /* Find the reduction closest to the requested time per frame */ 881 for (i = 0; i < ARRAY_SIZE(csi_skip); i++, skip++) { 882 u64 tmp, err; 883 884 tmp = div_u64((u64)USEC_PER_SEC * in->numerator * 885 skip->max_ratio, in->denominator * skip->keep); 886 887 err = abs((s64)tmp - want_us); 888 if (err < min_err) { 889 min_err = err; 890 best_skip = skip; 891 } 892 } 893 894 *out = *in; 895 csi_apply_skip_interval(best_skip, out); 896 897 return best_skip; 898 } 899 900 /* 901 * V4L2 subdev operations. 902 */ 903 904 static int csi_g_frame_interval(struct v4l2_subdev *sd, 905 struct v4l2_subdev_frame_interval *fi) 906 { 907 struct csi_priv *priv = v4l2_get_subdevdata(sd); 908 909 if (fi->pad >= CSI_NUM_PADS) 910 return -EINVAL; 911 912 mutex_lock(&priv->lock); 913 914 fi->interval = priv->frame_interval[fi->pad]; 915 916 mutex_unlock(&priv->lock); 917 918 return 0; 919 } 920 921 static int csi_s_frame_interval(struct v4l2_subdev *sd, 922 struct v4l2_subdev_frame_interval *fi) 923 { 924 struct csi_priv *priv = v4l2_get_subdevdata(sd); 925 struct v4l2_fract *input_fi; 926 int ret = 0; 927 928 mutex_lock(&priv->lock); 929 930 input_fi = &priv->frame_interval[CSI_SINK_PAD]; 931 932 switch (fi->pad) { 933 case CSI_SINK_PAD: 934 /* No limits on valid input frame intervals */ 935 if (fi->interval.numerator == 0 || 936 fi->interval.denominator == 0) 937 fi->interval = *input_fi; 938 /* Reset output intervals and frame skipping ratio to 1:1 */ 939 priv->frame_interval[CSI_SRC_PAD_IDMAC] = fi->interval; 940 priv->frame_interval[CSI_SRC_PAD_DIRECT] = fi->interval; 941 priv->skip = &csi_skip[0]; 942 break; 943 case CSI_SRC_PAD_IDMAC: 944 /* 945 * frame interval at IDMAC output pad depends on input 946 * interval, modified by frame skipping. 947 */ 948 priv->skip = csi_find_best_skip(input_fi, &fi->interval); 949 break; 950 case CSI_SRC_PAD_DIRECT: 951 /* 952 * frame interval at DIRECT output pad is same as input 953 * interval. 954 */ 955 fi->interval = *input_fi; 956 break; 957 default: 958 ret = -EINVAL; 959 goto out; 960 } 961 962 priv->frame_interval[fi->pad] = fi->interval; 963 out: 964 mutex_unlock(&priv->lock); 965 return ret; 966 } 967 968 static int csi_s_stream(struct v4l2_subdev *sd, int enable) 969 { 970 struct csi_priv *priv = v4l2_get_subdevdata(sd); 971 int ret = 0; 972 973 mutex_lock(&priv->lock); 974 975 if (!priv->src_sd || !priv->sink) { 976 ret = -EPIPE; 977 goto out; 978 } 979 980 /* 981 * enable/disable streaming only if stream_count is 982 * going from 0 to 1 / 1 to 0. 983 */ 984 if (priv->stream_count != !enable) 985 goto update_count; 986 987 if (enable) { 988 dev_dbg(priv->dev, "stream ON\n"); 989 ret = csi_start(priv); 990 if (ret) 991 goto out; 992 } else { 993 dev_dbg(priv->dev, "stream OFF\n"); 994 csi_stop(priv); 995 } 996 997 update_count: 998 priv->stream_count += enable ? 1 : -1; 999 if (priv->stream_count < 0) 1000 priv->stream_count = 0; 1001 out: 1002 mutex_unlock(&priv->lock); 1003 return ret; 1004 } 1005 1006 static int csi_link_setup(struct media_entity *entity, 1007 const struct media_pad *local, 1008 const struct media_pad *remote, u32 flags) 1009 { 1010 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); 1011 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1012 struct v4l2_subdev *remote_sd; 1013 int ret = 0; 1014 1015 dev_dbg(priv->dev, "link setup %s -> %s\n", remote->entity->name, 1016 local->entity->name); 1017 1018 mutex_lock(&priv->lock); 1019 1020 if (local->flags & MEDIA_PAD_FL_SINK) { 1021 if (!is_media_entity_v4l2_subdev(remote->entity)) { 1022 ret = -EINVAL; 1023 goto out; 1024 } 1025 1026 remote_sd = media_entity_to_v4l2_subdev(remote->entity); 1027 1028 if (flags & MEDIA_LNK_FL_ENABLED) { 1029 if (priv->src_sd) { 1030 ret = -EBUSY; 1031 goto out; 1032 } 1033 priv->src_sd = remote_sd; 1034 } else { 1035 priv->src_sd = NULL; 1036 } 1037 1038 goto out; 1039 } 1040 1041 /* this is a source pad */ 1042 1043 if (flags & MEDIA_LNK_FL_ENABLED) { 1044 if (priv->sink) { 1045 ret = -EBUSY; 1046 goto out; 1047 } 1048 } else { 1049 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 1050 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0); 1051 priv->sink = NULL; 1052 /* do not apply IC burst alignment in csi_try_crop */ 1053 priv->active_output_pad = CSI_SRC_PAD_IDMAC; 1054 goto out; 1055 } 1056 1057 /* record which output pad is now active */ 1058 priv->active_output_pad = local->index; 1059 1060 /* set CSI destination */ 1061 if (local->index == CSI_SRC_PAD_IDMAC) { 1062 if (!is_media_entity_v4l2_video_device(remote->entity)) { 1063 ret = -EINVAL; 1064 goto out; 1065 } 1066 1067 if (priv->fim) { 1068 ret = imx_media_fim_add_controls(priv->fim); 1069 if (ret) 1070 goto out; 1071 } 1072 1073 priv->dest = IPU_CSI_DEST_IDMAC; 1074 } else { 1075 if (!is_media_entity_v4l2_subdev(remote->entity)) { 1076 ret = -EINVAL; 1077 goto out; 1078 } 1079 1080 remote_sd = media_entity_to_v4l2_subdev(remote->entity); 1081 switch (remote_sd->grp_id) { 1082 case IMX_MEDIA_GRP_ID_IPU_VDIC: 1083 priv->dest = IPU_CSI_DEST_VDIC; 1084 break; 1085 case IMX_MEDIA_GRP_ID_IPU_IC_PRP: 1086 priv->dest = IPU_CSI_DEST_IC; 1087 break; 1088 default: 1089 ret = -EINVAL; 1090 goto out; 1091 } 1092 } 1093 1094 priv->sink = remote->entity; 1095 out: 1096 mutex_unlock(&priv->lock); 1097 return ret; 1098 } 1099 1100 static int csi_link_validate(struct v4l2_subdev *sd, 1101 struct media_link *link, 1102 struct v4l2_subdev_format *source_fmt, 1103 struct v4l2_subdev_format *sink_fmt) 1104 { 1105 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1106 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1107 bool is_csi2; 1108 int ret; 1109 1110 ret = v4l2_subdev_link_validate_default(sd, link, 1111 source_fmt, sink_fmt); 1112 if (ret) 1113 return ret; 1114 1115 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1116 if (ret) { 1117 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1118 return ret; 1119 } 1120 1121 mutex_lock(&priv->lock); 1122 1123 priv->upstream_ep = upstream_ep; 1124 is_csi2 = !is_parallel_bus(&upstream_ep); 1125 if (is_csi2) { 1126 int vc_num = 0; 1127 /* 1128 * NOTE! It seems the virtual channels from the mipi csi-2 1129 * receiver are used only for routing by the video mux's, 1130 * or for hard-wired routing to the CSI's. Once the stream 1131 * enters the CSI's however, they are treated internally 1132 * in the IPU as virtual channel 0. 1133 */ 1134 #if 0 1135 mutex_unlock(&priv->lock); 1136 vc_num = imx_media_find_mipi_csi2_channel(&priv->sd.entity); 1137 if (vc_num < 0) 1138 return vc_num; 1139 mutex_lock(&priv->lock); 1140 #endif 1141 ipu_csi_set_mipi_datatype(priv->csi, vc_num, 1142 &priv->format_mbus[CSI_SINK_PAD]); 1143 } 1144 1145 /* select either parallel or MIPI-CSI2 as input to CSI */ 1146 ipu_set_csi_src_mux(priv->ipu, priv->csi_id, is_csi2); 1147 1148 mutex_unlock(&priv->lock); 1149 return ret; 1150 } 1151 1152 static struct v4l2_mbus_framefmt * 1153 __csi_get_fmt(struct csi_priv *priv, struct v4l2_subdev_pad_config *cfg, 1154 unsigned int pad, enum v4l2_subdev_format_whence which) 1155 { 1156 if (which == V4L2_SUBDEV_FORMAT_TRY) 1157 return v4l2_subdev_get_try_format(&priv->sd, cfg, pad); 1158 else 1159 return &priv->format_mbus[pad]; 1160 } 1161 1162 static struct v4l2_rect * 1163 __csi_get_crop(struct csi_priv *priv, struct v4l2_subdev_pad_config *cfg, 1164 enum v4l2_subdev_format_whence which) 1165 { 1166 if (which == V4L2_SUBDEV_FORMAT_TRY) 1167 return v4l2_subdev_get_try_crop(&priv->sd, cfg, CSI_SINK_PAD); 1168 else 1169 return &priv->crop; 1170 } 1171 1172 static struct v4l2_rect * 1173 __csi_get_compose(struct csi_priv *priv, struct v4l2_subdev_pad_config *cfg, 1174 enum v4l2_subdev_format_whence which) 1175 { 1176 if (which == V4L2_SUBDEV_FORMAT_TRY) 1177 return v4l2_subdev_get_try_compose(&priv->sd, cfg, 1178 CSI_SINK_PAD); 1179 else 1180 return &priv->compose; 1181 } 1182 1183 static void csi_try_crop(struct csi_priv *priv, 1184 struct v4l2_rect *crop, 1185 struct v4l2_subdev_pad_config *cfg, 1186 struct v4l2_mbus_framefmt *infmt, 1187 struct v4l2_fwnode_endpoint *upstream_ep) 1188 { 1189 u32 in_height; 1190 1191 crop->width = min_t(__u32, infmt->width, crop->width); 1192 if (crop->left + crop->width > infmt->width) 1193 crop->left = infmt->width - crop->width; 1194 /* adjust crop left/width to h/w alignment restrictions */ 1195 crop->left &= ~0x3; 1196 if (priv->active_output_pad == CSI_SRC_PAD_DIRECT) 1197 crop->width &= ~0x7; /* multiple of 8 pixels (IC burst) */ 1198 else 1199 crop->width &= ~0x1; /* multiple of 2 pixels */ 1200 1201 in_height = infmt->height; 1202 if (infmt->field == V4L2_FIELD_ALTERNATE) 1203 in_height *= 2; 1204 1205 /* 1206 * FIXME: not sure why yet, but on interlaced bt.656, 1207 * changing the vertical cropping causes loss of vertical 1208 * sync, so fix it to NTSC/PAL active lines. NTSC contains 1209 * 2 extra lines of active video that need to be cropped. 1210 */ 1211 if (upstream_ep->bus_type == V4L2_MBUS_BT656 && 1212 (V4L2_FIELD_HAS_BOTH(infmt->field) || 1213 infmt->field == V4L2_FIELD_ALTERNATE)) { 1214 crop->height = in_height; 1215 crop->top = (in_height == 480) ? 2 : 0; 1216 } else { 1217 crop->height = min_t(__u32, in_height, crop->height); 1218 if (crop->top + crop->height > in_height) 1219 crop->top = in_height - crop->height; 1220 } 1221 } 1222 1223 static int csi_enum_mbus_code(struct v4l2_subdev *sd, 1224 struct v4l2_subdev_pad_config *cfg, 1225 struct v4l2_subdev_mbus_code_enum *code) 1226 { 1227 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1228 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1229 const struct imx_media_pixfmt *incc; 1230 struct v4l2_mbus_framefmt *infmt; 1231 int ret = 0; 1232 1233 mutex_lock(&priv->lock); 1234 1235 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, code->which); 1236 incc = imx_media_find_mbus_format(infmt->code, CS_SEL_ANY, true); 1237 1238 switch (code->pad) { 1239 case CSI_SINK_PAD: 1240 ret = imx_media_enum_mbus_format(&code->code, code->index, 1241 CS_SEL_ANY, true); 1242 break; 1243 case CSI_SRC_PAD_DIRECT: 1244 case CSI_SRC_PAD_IDMAC: 1245 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1246 if (ret) { 1247 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1248 goto out; 1249 } 1250 1251 if (requires_passthrough(&upstream_ep, infmt, incc)) { 1252 if (code->index != 0) { 1253 ret = -EINVAL; 1254 goto out; 1255 } 1256 code->code = infmt->code; 1257 } else { 1258 u32 cs_sel = (incc->cs == IPUV3_COLORSPACE_YUV) ? 1259 CS_SEL_YUV : CS_SEL_RGB; 1260 ret = imx_media_enum_ipu_format(&code->code, 1261 code->index, 1262 cs_sel); 1263 } 1264 break; 1265 default: 1266 ret = -EINVAL; 1267 } 1268 1269 out: 1270 mutex_unlock(&priv->lock); 1271 return ret; 1272 } 1273 1274 static int csi_enum_frame_size(struct v4l2_subdev *sd, 1275 struct v4l2_subdev_pad_config *cfg, 1276 struct v4l2_subdev_frame_size_enum *fse) 1277 { 1278 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1279 struct v4l2_rect *crop; 1280 int ret = 0; 1281 1282 if (fse->pad >= CSI_NUM_PADS || 1283 fse->index > (fse->pad == CSI_SINK_PAD ? 0 : 3)) 1284 return -EINVAL; 1285 1286 mutex_lock(&priv->lock); 1287 1288 if (fse->pad == CSI_SINK_PAD) { 1289 fse->min_width = MIN_W; 1290 fse->max_width = MAX_W; 1291 fse->min_height = MIN_H; 1292 fse->max_height = MAX_H; 1293 } else { 1294 crop = __csi_get_crop(priv, cfg, fse->which); 1295 1296 fse->min_width = fse->index & 1 ? 1297 crop->width / 2 : crop->width; 1298 fse->max_width = fse->min_width; 1299 fse->min_height = fse->index & 2 ? 1300 crop->height / 2 : crop->height; 1301 fse->max_height = fse->min_height; 1302 } 1303 1304 mutex_unlock(&priv->lock); 1305 return ret; 1306 } 1307 1308 static int csi_enum_frame_interval(struct v4l2_subdev *sd, 1309 struct v4l2_subdev_pad_config *cfg, 1310 struct v4l2_subdev_frame_interval_enum *fie) 1311 { 1312 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1313 struct v4l2_fract *input_fi; 1314 struct v4l2_rect *crop; 1315 int ret = 0; 1316 1317 if (fie->pad >= CSI_NUM_PADS || 1318 fie->index >= (fie->pad != CSI_SRC_PAD_IDMAC ? 1319 1 : ARRAY_SIZE(csi_skip))) 1320 return -EINVAL; 1321 1322 mutex_lock(&priv->lock); 1323 1324 input_fi = &priv->frame_interval[CSI_SINK_PAD]; 1325 crop = __csi_get_crop(priv, cfg, fie->which); 1326 1327 if ((fie->width != crop->width && fie->width != crop->width / 2) || 1328 (fie->height != crop->height && fie->height != crop->height / 2)) { 1329 ret = -EINVAL; 1330 goto out; 1331 } 1332 1333 fie->interval = *input_fi; 1334 1335 if (fie->pad == CSI_SRC_PAD_IDMAC) 1336 csi_apply_skip_interval(&csi_skip[fie->index], 1337 &fie->interval); 1338 1339 out: 1340 mutex_unlock(&priv->lock); 1341 return ret; 1342 } 1343 1344 static int csi_get_fmt(struct v4l2_subdev *sd, 1345 struct v4l2_subdev_pad_config *cfg, 1346 struct v4l2_subdev_format *sdformat) 1347 { 1348 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1349 struct v4l2_mbus_framefmt *fmt; 1350 int ret = 0; 1351 1352 if (sdformat->pad >= CSI_NUM_PADS) 1353 return -EINVAL; 1354 1355 mutex_lock(&priv->lock); 1356 1357 fmt = __csi_get_fmt(priv, cfg, sdformat->pad, sdformat->which); 1358 if (!fmt) { 1359 ret = -EINVAL; 1360 goto out; 1361 } 1362 1363 sdformat->format = *fmt; 1364 out: 1365 mutex_unlock(&priv->lock); 1366 return ret; 1367 } 1368 1369 static void csi_try_field(struct csi_priv *priv, 1370 struct v4l2_subdev_pad_config *cfg, 1371 struct v4l2_subdev_format *sdformat) 1372 { 1373 struct v4l2_mbus_framefmt *infmt = 1374 __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sdformat->which); 1375 1376 /* no restrictions on sink pad field type */ 1377 if (sdformat->pad == CSI_SINK_PAD) 1378 return; 1379 1380 switch (infmt->field) { 1381 case V4L2_FIELD_SEQ_TB: 1382 case V4L2_FIELD_SEQ_BT: 1383 /* 1384 * If the user requests sequential at the source pad, 1385 * allow it (along with possibly inverting field order). 1386 * Otherwise passthrough the field type. 1387 */ 1388 if (!V4L2_FIELD_IS_SEQUENTIAL(sdformat->format.field)) 1389 sdformat->format.field = infmt->field; 1390 break; 1391 case V4L2_FIELD_ALTERNATE: 1392 /* 1393 * This driver does not support alternate field mode, and 1394 * the CSI captures a whole frame, so the CSI never presents 1395 * alternate mode at its source pads. If user has not 1396 * already requested sequential, translate ALTERNATE at 1397 * sink pad to SEQ_TB or SEQ_BT at the source pad depending 1398 * on input height (assume NTSC BT order if 480 total active 1399 * frame lines, otherwise PAL TB order). 1400 */ 1401 if (!V4L2_FIELD_IS_SEQUENTIAL(sdformat->format.field)) 1402 sdformat->format.field = (infmt->height == 480 / 2) ? 1403 V4L2_FIELD_SEQ_BT : V4L2_FIELD_SEQ_TB; 1404 break; 1405 default: 1406 /* Passthrough for all other input field types */ 1407 sdformat->format.field = infmt->field; 1408 break; 1409 } 1410 } 1411 1412 static void csi_try_fmt(struct csi_priv *priv, 1413 struct v4l2_fwnode_endpoint *upstream_ep, 1414 struct v4l2_subdev_pad_config *cfg, 1415 struct v4l2_subdev_format *sdformat, 1416 struct v4l2_rect *crop, 1417 struct v4l2_rect *compose, 1418 const struct imx_media_pixfmt **cc) 1419 { 1420 const struct imx_media_pixfmt *incc; 1421 struct v4l2_mbus_framefmt *infmt; 1422 u32 code; 1423 1424 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sdformat->which); 1425 1426 switch (sdformat->pad) { 1427 case CSI_SRC_PAD_DIRECT: 1428 case CSI_SRC_PAD_IDMAC: 1429 incc = imx_media_find_mbus_format(infmt->code, 1430 CS_SEL_ANY, true); 1431 1432 sdformat->format.width = compose->width; 1433 sdformat->format.height = compose->height; 1434 1435 if (requires_passthrough(upstream_ep, infmt, incc)) { 1436 sdformat->format.code = infmt->code; 1437 *cc = incc; 1438 } else { 1439 u32 cs_sel = (incc->cs == IPUV3_COLORSPACE_YUV) ? 1440 CS_SEL_YUV : CS_SEL_RGB; 1441 1442 *cc = imx_media_find_ipu_format(sdformat->format.code, 1443 cs_sel); 1444 if (!*cc) { 1445 imx_media_enum_ipu_format(&code, 0, cs_sel); 1446 *cc = imx_media_find_ipu_format(code, cs_sel); 1447 sdformat->format.code = (*cc)->codes[0]; 1448 } 1449 } 1450 1451 csi_try_field(priv, cfg, sdformat); 1452 1453 /* propagate colorimetry from sink */ 1454 sdformat->format.colorspace = infmt->colorspace; 1455 sdformat->format.xfer_func = infmt->xfer_func; 1456 sdformat->format.quantization = infmt->quantization; 1457 sdformat->format.ycbcr_enc = infmt->ycbcr_enc; 1458 1459 break; 1460 case CSI_SINK_PAD: 1461 v4l_bound_align_image(&sdformat->format.width, MIN_W, MAX_W, 1462 W_ALIGN, &sdformat->format.height, 1463 MIN_H, MAX_H, H_ALIGN, S_ALIGN); 1464 1465 *cc = imx_media_find_mbus_format(sdformat->format.code, 1466 CS_SEL_ANY, true); 1467 if (!*cc) { 1468 imx_media_enum_mbus_format(&code, 0, 1469 CS_SEL_ANY, false); 1470 *cc = imx_media_find_mbus_format(code, 1471 CS_SEL_ANY, false); 1472 sdformat->format.code = (*cc)->codes[0]; 1473 } 1474 1475 csi_try_field(priv, cfg, sdformat); 1476 1477 imx_media_fill_default_mbus_fields( 1478 &sdformat->format, infmt, 1479 priv->active_output_pad == CSI_SRC_PAD_DIRECT); 1480 1481 /* Reset crop and compose rectangles */ 1482 crop->left = 0; 1483 crop->top = 0; 1484 crop->width = sdformat->format.width; 1485 crop->height = sdformat->format.height; 1486 if (sdformat->format.field == V4L2_FIELD_ALTERNATE) 1487 crop->height *= 2; 1488 csi_try_crop(priv, crop, cfg, &sdformat->format, upstream_ep); 1489 compose->left = 0; 1490 compose->top = 0; 1491 compose->width = crop->width; 1492 compose->height = crop->height; 1493 1494 break; 1495 } 1496 } 1497 1498 static int csi_set_fmt(struct v4l2_subdev *sd, 1499 struct v4l2_subdev_pad_config *cfg, 1500 struct v4l2_subdev_format *sdformat) 1501 { 1502 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1503 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1504 const struct imx_media_pixfmt *cc; 1505 struct v4l2_mbus_framefmt *fmt; 1506 struct v4l2_rect *crop, *compose; 1507 int ret; 1508 1509 if (sdformat->pad >= CSI_NUM_PADS) 1510 return -EINVAL; 1511 1512 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1513 if (ret) { 1514 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1515 return ret; 1516 } 1517 1518 mutex_lock(&priv->lock); 1519 1520 if (priv->stream_count > 0) { 1521 ret = -EBUSY; 1522 goto out; 1523 } 1524 1525 crop = __csi_get_crop(priv, cfg, sdformat->which); 1526 compose = __csi_get_compose(priv, cfg, sdformat->which); 1527 1528 csi_try_fmt(priv, &upstream_ep, cfg, sdformat, crop, compose, &cc); 1529 1530 fmt = __csi_get_fmt(priv, cfg, sdformat->pad, sdformat->which); 1531 *fmt = sdformat->format; 1532 1533 if (sdformat->pad == CSI_SINK_PAD) { 1534 int pad; 1535 1536 /* propagate format to source pads */ 1537 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) { 1538 const struct imx_media_pixfmt *outcc; 1539 struct v4l2_mbus_framefmt *outfmt; 1540 struct v4l2_subdev_format format; 1541 1542 format.pad = pad; 1543 format.which = sdformat->which; 1544 format.format = sdformat->format; 1545 csi_try_fmt(priv, &upstream_ep, cfg, &format, 1546 NULL, compose, &outcc); 1547 1548 outfmt = __csi_get_fmt(priv, cfg, pad, sdformat->which); 1549 *outfmt = format.format; 1550 1551 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE) 1552 priv->cc[pad] = outcc; 1553 } 1554 } 1555 1556 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE) 1557 priv->cc[sdformat->pad] = cc; 1558 1559 out: 1560 mutex_unlock(&priv->lock); 1561 return ret; 1562 } 1563 1564 static int csi_get_selection(struct v4l2_subdev *sd, 1565 struct v4l2_subdev_pad_config *cfg, 1566 struct v4l2_subdev_selection *sel) 1567 { 1568 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1569 struct v4l2_mbus_framefmt *infmt; 1570 struct v4l2_rect *crop, *compose; 1571 int ret = 0; 1572 1573 if (sel->pad != CSI_SINK_PAD) 1574 return -EINVAL; 1575 1576 mutex_lock(&priv->lock); 1577 1578 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sel->which); 1579 crop = __csi_get_crop(priv, cfg, sel->which); 1580 compose = __csi_get_compose(priv, cfg, sel->which); 1581 1582 switch (sel->target) { 1583 case V4L2_SEL_TGT_CROP_BOUNDS: 1584 sel->r.left = 0; 1585 sel->r.top = 0; 1586 sel->r.width = infmt->width; 1587 sel->r.height = infmt->height; 1588 if (infmt->field == V4L2_FIELD_ALTERNATE) 1589 sel->r.height *= 2; 1590 break; 1591 case V4L2_SEL_TGT_CROP: 1592 sel->r = *crop; 1593 break; 1594 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 1595 sel->r.left = 0; 1596 sel->r.top = 0; 1597 sel->r.width = crop->width; 1598 sel->r.height = crop->height; 1599 break; 1600 case V4L2_SEL_TGT_COMPOSE: 1601 sel->r = *compose; 1602 break; 1603 default: 1604 ret = -EINVAL; 1605 } 1606 1607 mutex_unlock(&priv->lock); 1608 return ret; 1609 } 1610 1611 static int csi_set_scale(u32 *compose, u32 crop, u32 flags) 1612 { 1613 if ((flags & (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE)) == 1614 (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE) && 1615 *compose != crop && *compose != crop / 2) 1616 return -ERANGE; 1617 1618 if (*compose <= crop / 2 || 1619 (*compose < crop * 3 / 4 && !(flags & V4L2_SEL_FLAG_GE)) || 1620 (*compose < crop && (flags & V4L2_SEL_FLAG_LE))) 1621 *compose = crop / 2; 1622 else 1623 *compose = crop; 1624 1625 return 0; 1626 } 1627 1628 static int csi_set_selection(struct v4l2_subdev *sd, 1629 struct v4l2_subdev_pad_config *cfg, 1630 struct v4l2_subdev_selection *sel) 1631 { 1632 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1633 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1634 struct v4l2_mbus_framefmt *infmt; 1635 struct v4l2_rect *crop, *compose; 1636 int pad, ret; 1637 1638 if (sel->pad != CSI_SINK_PAD) 1639 return -EINVAL; 1640 1641 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1642 if (ret) { 1643 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1644 return ret; 1645 } 1646 1647 mutex_lock(&priv->lock); 1648 1649 if (priv->stream_count > 0) { 1650 ret = -EBUSY; 1651 goto out; 1652 } 1653 1654 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sel->which); 1655 crop = __csi_get_crop(priv, cfg, sel->which); 1656 compose = __csi_get_compose(priv, cfg, sel->which); 1657 1658 switch (sel->target) { 1659 case V4L2_SEL_TGT_CROP: 1660 /* 1661 * Modifying the crop rectangle always changes the format on 1662 * the source pads. If the KEEP_CONFIG flag is set, just return 1663 * the current crop rectangle. 1664 */ 1665 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) { 1666 sel->r = priv->crop; 1667 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1668 *crop = sel->r; 1669 goto out; 1670 } 1671 1672 csi_try_crop(priv, &sel->r, cfg, infmt, &upstream_ep); 1673 1674 *crop = sel->r; 1675 1676 /* Reset scaling to 1:1 */ 1677 compose->width = crop->width; 1678 compose->height = crop->height; 1679 break; 1680 case V4L2_SEL_TGT_COMPOSE: 1681 /* 1682 * Modifying the compose rectangle always changes the format on 1683 * the source pads. If the KEEP_CONFIG flag is set, just return 1684 * the current compose rectangle. 1685 */ 1686 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) { 1687 sel->r = priv->compose; 1688 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1689 *compose = sel->r; 1690 goto out; 1691 } 1692 1693 sel->r.left = 0; 1694 sel->r.top = 0; 1695 ret = csi_set_scale(&sel->r.width, crop->width, sel->flags); 1696 if (ret) 1697 goto out; 1698 ret = csi_set_scale(&sel->r.height, crop->height, sel->flags); 1699 if (ret) 1700 goto out; 1701 1702 *compose = sel->r; 1703 break; 1704 default: 1705 ret = -EINVAL; 1706 goto out; 1707 } 1708 1709 /* Reset source pads to sink compose rectangle */ 1710 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) { 1711 struct v4l2_mbus_framefmt *outfmt; 1712 1713 outfmt = __csi_get_fmt(priv, cfg, pad, sel->which); 1714 outfmt->width = compose->width; 1715 outfmt->height = compose->height; 1716 } 1717 1718 out: 1719 mutex_unlock(&priv->lock); 1720 return ret; 1721 } 1722 1723 static int csi_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, 1724 struct v4l2_event_subscription *sub) 1725 { 1726 if (sub->type != V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR) 1727 return -EINVAL; 1728 if (sub->id != 0) 1729 return -EINVAL; 1730 1731 return v4l2_event_subscribe(fh, sub, 0, NULL); 1732 } 1733 1734 static int csi_unsubscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, 1735 struct v4l2_event_subscription *sub) 1736 { 1737 return v4l2_event_unsubscribe(fh, sub); 1738 } 1739 1740 /* 1741 * retrieve our pads parsed from the OF graph by the media device 1742 */ 1743 static int csi_registered(struct v4l2_subdev *sd) 1744 { 1745 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1746 struct ipu_csi *csi; 1747 int i, ret; 1748 u32 code; 1749 1750 /* get handle to IPU CSI */ 1751 csi = ipu_csi_get(priv->ipu, priv->csi_id); 1752 if (IS_ERR(csi)) { 1753 v4l2_err(&priv->sd, "failed to get CSI%d\n", priv->csi_id); 1754 return PTR_ERR(csi); 1755 } 1756 priv->csi = csi; 1757 1758 for (i = 0; i < CSI_NUM_PADS; i++) { 1759 priv->pad[i].flags = (i == CSI_SINK_PAD) ? 1760 MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE; 1761 1762 code = 0; 1763 if (i != CSI_SINK_PAD) 1764 imx_media_enum_ipu_format(&code, 0, CS_SEL_YUV); 1765 1766 /* set a default mbus format */ 1767 ret = imx_media_init_mbus_fmt(&priv->format_mbus[i], 1768 640, 480, code, V4L2_FIELD_NONE, 1769 &priv->cc[i]); 1770 if (ret) 1771 goto put_csi; 1772 1773 /* init default frame interval */ 1774 priv->frame_interval[i].numerator = 1; 1775 priv->frame_interval[i].denominator = 30; 1776 } 1777 1778 /* disable frame skipping */ 1779 priv->skip = &csi_skip[0]; 1780 1781 /* init default crop and compose rectangle sizes */ 1782 priv->crop.width = 640; 1783 priv->crop.height = 480; 1784 priv->compose.width = 640; 1785 priv->compose.height = 480; 1786 1787 priv->fim = imx_media_fim_init(&priv->sd); 1788 if (IS_ERR(priv->fim)) { 1789 ret = PTR_ERR(priv->fim); 1790 goto put_csi; 1791 } 1792 1793 ret = media_entity_pads_init(&sd->entity, CSI_NUM_PADS, priv->pad); 1794 if (ret) 1795 goto free_fim; 1796 1797 ret = imx_media_capture_device_register(priv->vdev); 1798 if (ret) 1799 goto free_fim; 1800 1801 return 0; 1802 1803 free_fim: 1804 if (priv->fim) 1805 imx_media_fim_free(priv->fim); 1806 put_csi: 1807 ipu_csi_put(priv->csi); 1808 return ret; 1809 } 1810 1811 static void csi_unregistered(struct v4l2_subdev *sd) 1812 { 1813 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1814 1815 imx_media_capture_device_unregister(priv->vdev); 1816 1817 if (priv->fim) 1818 imx_media_fim_free(priv->fim); 1819 1820 if (priv->csi) 1821 ipu_csi_put(priv->csi); 1822 } 1823 1824 static const struct media_entity_operations csi_entity_ops = { 1825 .link_setup = csi_link_setup, 1826 .link_validate = v4l2_subdev_link_validate, 1827 }; 1828 1829 static const struct v4l2_subdev_core_ops csi_core_ops = { 1830 .subscribe_event = csi_subscribe_event, 1831 .unsubscribe_event = csi_unsubscribe_event, 1832 }; 1833 1834 static const struct v4l2_subdev_video_ops csi_video_ops = { 1835 .g_frame_interval = csi_g_frame_interval, 1836 .s_frame_interval = csi_s_frame_interval, 1837 .s_stream = csi_s_stream, 1838 }; 1839 1840 static const struct v4l2_subdev_pad_ops csi_pad_ops = { 1841 .init_cfg = imx_media_init_cfg, 1842 .enum_mbus_code = csi_enum_mbus_code, 1843 .enum_frame_size = csi_enum_frame_size, 1844 .enum_frame_interval = csi_enum_frame_interval, 1845 .get_fmt = csi_get_fmt, 1846 .set_fmt = csi_set_fmt, 1847 .get_selection = csi_get_selection, 1848 .set_selection = csi_set_selection, 1849 .link_validate = csi_link_validate, 1850 }; 1851 1852 static const struct v4l2_subdev_ops csi_subdev_ops = { 1853 .core = &csi_core_ops, 1854 .video = &csi_video_ops, 1855 .pad = &csi_pad_ops, 1856 }; 1857 1858 static const struct v4l2_subdev_internal_ops csi_internal_ops = { 1859 .registered = csi_registered, 1860 .unregistered = csi_unregistered, 1861 }; 1862 1863 static int imx_csi_parse_endpoint(struct device *dev, 1864 struct v4l2_fwnode_endpoint *vep, 1865 struct v4l2_async_subdev *asd) 1866 { 1867 return fwnode_device_is_available(asd->match.fwnode) ? 0 : -ENOTCONN; 1868 } 1869 1870 static int imx_csi_async_register(struct csi_priv *priv) 1871 { 1872 struct v4l2_async_notifier *notifier; 1873 struct fwnode_handle *fwnode; 1874 unsigned int port; 1875 int ret; 1876 1877 notifier = kzalloc(sizeof(*notifier), GFP_KERNEL); 1878 if (!notifier) 1879 return -ENOMEM; 1880 1881 v4l2_async_notifier_init(notifier); 1882 1883 fwnode = dev_fwnode(priv->dev); 1884 1885 /* get this CSI's port id */ 1886 ret = fwnode_property_read_u32(fwnode, "reg", &port); 1887 if (ret < 0) 1888 goto out_free; 1889 1890 ret = v4l2_async_notifier_parse_fwnode_endpoints_by_port( 1891 priv->dev->parent, notifier, sizeof(struct v4l2_async_subdev), 1892 port, imx_csi_parse_endpoint); 1893 if (ret < 0) 1894 goto out_cleanup; 1895 1896 ret = v4l2_async_subdev_notifier_register(&priv->sd, notifier); 1897 if (ret < 0) 1898 goto out_cleanup; 1899 1900 ret = v4l2_async_register_subdev(&priv->sd); 1901 if (ret < 0) 1902 goto out_unregister; 1903 1904 priv->sd.subdev_notifier = notifier; 1905 1906 return 0; 1907 1908 out_unregister: 1909 v4l2_async_notifier_unregister(notifier); 1910 out_cleanup: 1911 v4l2_async_notifier_cleanup(notifier); 1912 out_free: 1913 kfree(notifier); 1914 1915 return ret; 1916 } 1917 1918 static int imx_csi_probe(struct platform_device *pdev) 1919 { 1920 struct ipu_client_platformdata *pdata; 1921 struct pinctrl *pinctrl; 1922 struct csi_priv *priv; 1923 int ret; 1924 1925 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 1926 if (!priv) 1927 return -ENOMEM; 1928 1929 platform_set_drvdata(pdev, &priv->sd); 1930 priv->dev = &pdev->dev; 1931 1932 ret = dma_set_coherent_mask(priv->dev, DMA_BIT_MASK(32)); 1933 if (ret) 1934 return ret; 1935 1936 /* get parent IPU */ 1937 priv->ipu = dev_get_drvdata(priv->dev->parent); 1938 1939 /* get our CSI id */ 1940 pdata = priv->dev->platform_data; 1941 priv->csi_id = pdata->csi; 1942 priv->smfc_id = (priv->csi_id == 0) ? 0 : 2; 1943 1944 priv->active_output_pad = CSI_SRC_PAD_IDMAC; 1945 1946 timer_setup(&priv->eof_timeout_timer, csi_idmac_eof_timeout, 0); 1947 spin_lock_init(&priv->irqlock); 1948 1949 v4l2_subdev_init(&priv->sd, &csi_subdev_ops); 1950 v4l2_set_subdevdata(&priv->sd, priv); 1951 priv->sd.internal_ops = &csi_internal_ops; 1952 priv->sd.entity.ops = &csi_entity_ops; 1953 priv->sd.entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER; 1954 priv->sd.dev = &pdev->dev; 1955 priv->sd.fwnode = of_fwnode_handle(pdata->of_node); 1956 priv->sd.owner = THIS_MODULE; 1957 priv->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; 1958 priv->sd.grp_id = priv->csi_id ? 1959 IMX_MEDIA_GRP_ID_IPU_CSI1 : IMX_MEDIA_GRP_ID_IPU_CSI0; 1960 imx_media_grp_id_to_sd_name(priv->sd.name, sizeof(priv->sd.name), 1961 priv->sd.grp_id, ipu_get_num(priv->ipu)); 1962 1963 priv->vdev = imx_media_capture_device_init(priv->sd.dev, &priv->sd, 1964 CSI_SRC_PAD_IDMAC); 1965 if (IS_ERR(priv->vdev)) 1966 return PTR_ERR(priv->vdev); 1967 1968 mutex_init(&priv->lock); 1969 1970 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0); 1971 priv->sd.ctrl_handler = &priv->ctrl_hdlr; 1972 1973 /* 1974 * The IPUv3 driver did not assign an of_node to this 1975 * device. As a result, pinctrl does not automatically 1976 * configure our pin groups, so we need to do that manually 1977 * here, after setting this device's of_node. 1978 */ 1979 priv->dev->of_node = pdata->of_node; 1980 pinctrl = devm_pinctrl_get_select_default(priv->dev); 1981 if (IS_ERR(pinctrl)) { 1982 ret = PTR_ERR(pinctrl); 1983 dev_dbg(priv->dev, 1984 "devm_pinctrl_get_select_default() failed: %d\n", ret); 1985 if (ret != -ENODEV) 1986 goto free; 1987 } 1988 1989 ret = imx_csi_async_register(priv); 1990 if (ret) 1991 goto free; 1992 1993 return 0; 1994 free: 1995 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 1996 mutex_destroy(&priv->lock); 1997 imx_media_capture_device_remove(priv->vdev); 1998 return ret; 1999 } 2000 2001 static int imx_csi_remove(struct platform_device *pdev) 2002 { 2003 struct v4l2_subdev *sd = platform_get_drvdata(pdev); 2004 struct csi_priv *priv = sd_to_dev(sd); 2005 2006 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 2007 mutex_destroy(&priv->lock); 2008 imx_media_capture_device_remove(priv->vdev); 2009 v4l2_async_unregister_subdev(sd); 2010 media_entity_cleanup(&sd->entity); 2011 2012 return 0; 2013 } 2014 2015 static const struct platform_device_id imx_csi_ids[] = { 2016 { .name = "imx-ipuv3-csi" }, 2017 { }, 2018 }; 2019 MODULE_DEVICE_TABLE(platform, imx_csi_ids); 2020 2021 static struct platform_driver imx_csi_driver = { 2022 .probe = imx_csi_probe, 2023 .remove = imx_csi_remove, 2024 .id_table = imx_csi_ids, 2025 .driver = { 2026 .name = "imx-ipuv3-csi", 2027 }, 2028 }; 2029 module_platform_driver(imx_csi_driver); 2030 2031 MODULE_DESCRIPTION("i.MX CSI subdev driver"); 2032 MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>"); 2033 MODULE_LICENSE("GPL"); 2034 MODULE_ALIAS("platform:imx-ipuv3-csi"); 2035