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 * - the CSI is receiving from a 16-bit parallel bus, or 143 * - the CSI is receiving from an 8-bit parallel bus and the incoming 144 * media bus format is other than UYVY8_2X8/YUYV8_2X8. 145 */ 146 static inline bool requires_passthrough(struct v4l2_fwnode_endpoint *ep, 147 struct v4l2_mbus_framefmt *infmt, 148 const struct imx_media_pixfmt *incc) 149 { 150 return incc->bayer || is_parallel_16bit_bus(ep) || 151 (is_parallel_bus(ep) && 152 infmt->code != MEDIA_BUS_FMT_UYVY8_2X8 && 153 infmt->code != MEDIA_BUS_FMT_YUYV8_2X8); 154 } 155 156 /* 157 * Parses the fwnode endpoint from the source pad of the entity 158 * connected to this CSI. This will either be the entity directly 159 * upstream from the CSI-2 receiver, directly upstream from the 160 * video mux, or directly upstream from the CSI itself. The endpoint 161 * is needed to determine the bus type and bus config coming into 162 * the CSI. 163 */ 164 static int csi_get_upstream_endpoint(struct csi_priv *priv, 165 struct v4l2_fwnode_endpoint *ep) 166 { 167 struct fwnode_handle *endpoint; 168 struct v4l2_subdev *sd; 169 struct media_pad *pad; 170 171 if (!IS_ENABLED(CONFIG_OF)) 172 return -ENXIO; 173 174 if (!priv->src_sd) 175 return -EPIPE; 176 177 sd = priv->src_sd; 178 179 switch (sd->grp_id) { 180 case IMX_MEDIA_GRP_ID_CSI_MUX: 181 /* 182 * CSI is connected directly to CSI mux, skip up to 183 * CSI-2 receiver if it is in the path, otherwise stay 184 * with the CSI mux. 185 */ 186 sd = imx_media_pipeline_subdev(&sd->entity, 187 IMX_MEDIA_GRP_ID_CSI2, 188 true); 189 if (IS_ERR(sd)) 190 sd = priv->src_sd; 191 break; 192 case IMX_MEDIA_GRP_ID_CSI2: 193 break; 194 default: 195 /* 196 * the source is neither the CSI mux nor the CSI-2 receiver, 197 * get the source pad directly upstream from CSI itself. 198 */ 199 sd = &priv->sd; 200 break; 201 } 202 203 /* get source pad of entity directly upstream from sd */ 204 pad = imx_media_pipeline_pad(&sd->entity, 0, 0, true); 205 if (!pad) 206 return -ENODEV; 207 208 endpoint = imx_media_get_pad_fwnode(pad); 209 if (IS_ERR(endpoint)) 210 return PTR_ERR(endpoint); 211 212 v4l2_fwnode_endpoint_parse(endpoint, ep); 213 214 fwnode_handle_put(endpoint); 215 216 return 0; 217 } 218 219 static void csi_idmac_put_ipu_resources(struct csi_priv *priv) 220 { 221 if (priv->idmac_ch) 222 ipu_idmac_put(priv->idmac_ch); 223 priv->idmac_ch = NULL; 224 225 if (priv->smfc) 226 ipu_smfc_put(priv->smfc); 227 priv->smfc = NULL; 228 } 229 230 static int csi_idmac_get_ipu_resources(struct csi_priv *priv) 231 { 232 int ch_num, ret; 233 struct ipu_smfc *smfc; 234 struct ipuv3_channel *idmac_ch; 235 236 ch_num = IPUV3_CHANNEL_CSI0 + priv->smfc_id; 237 238 smfc = ipu_smfc_get(priv->ipu, ch_num); 239 if (IS_ERR(smfc)) { 240 v4l2_err(&priv->sd, "failed to get SMFC\n"); 241 ret = PTR_ERR(smfc); 242 goto out; 243 } 244 priv->smfc = smfc; 245 246 idmac_ch = ipu_idmac_get(priv->ipu, ch_num); 247 if (IS_ERR(idmac_ch)) { 248 v4l2_err(&priv->sd, "could not get IDMAC channel %u\n", 249 ch_num); 250 ret = PTR_ERR(idmac_ch); 251 goto out; 252 } 253 priv->idmac_ch = idmac_ch; 254 255 return 0; 256 out: 257 csi_idmac_put_ipu_resources(priv); 258 return ret; 259 } 260 261 static void csi_vb2_buf_done(struct csi_priv *priv) 262 { 263 struct imx_media_video_dev *vdev = priv->vdev; 264 struct imx_media_buffer *done, *next; 265 struct vb2_buffer *vb; 266 dma_addr_t phys; 267 268 done = priv->active_vb2_buf[priv->ipu_buf_num]; 269 if (done) { 270 done->vbuf.field = vdev->fmt.fmt.pix.field; 271 done->vbuf.sequence = priv->frame_sequence; 272 vb = &done->vbuf.vb2_buf; 273 vb->timestamp = ktime_get_ns(); 274 vb2_buffer_done(vb, priv->nfb4eof ? 275 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); 276 } 277 278 priv->frame_sequence++; 279 priv->nfb4eof = false; 280 281 /* get next queued buffer */ 282 next = imx_media_capture_device_next_buf(vdev); 283 if (next) { 284 phys = vb2_dma_contig_plane_dma_addr(&next->vbuf.vb2_buf, 0); 285 priv->active_vb2_buf[priv->ipu_buf_num] = next; 286 } else { 287 phys = priv->underrun_buf.phys; 288 priv->active_vb2_buf[priv->ipu_buf_num] = NULL; 289 } 290 291 if (ipu_idmac_buffer_is_ready(priv->idmac_ch, priv->ipu_buf_num)) 292 ipu_idmac_clear_buffer(priv->idmac_ch, priv->ipu_buf_num); 293 294 if (priv->interweave_swap) 295 phys += vdev->fmt.fmt.pix.bytesperline; 296 297 ipu_cpmem_set_buffer(priv->idmac_ch, priv->ipu_buf_num, phys); 298 } 299 300 static irqreturn_t csi_idmac_eof_interrupt(int irq, void *dev_id) 301 { 302 struct csi_priv *priv = dev_id; 303 304 spin_lock(&priv->irqlock); 305 306 if (priv->last_eof) { 307 complete(&priv->last_eof_comp); 308 priv->last_eof = false; 309 goto unlock; 310 } 311 312 if (priv->fim) 313 /* call frame interval monitor */ 314 imx_media_fim_eof_monitor(priv->fim, ktime_get()); 315 316 csi_vb2_buf_done(priv); 317 318 /* select new IPU buf */ 319 ipu_idmac_select_buffer(priv->idmac_ch, priv->ipu_buf_num); 320 /* toggle IPU double-buffer index */ 321 priv->ipu_buf_num ^= 1; 322 323 /* bump the EOF timeout timer */ 324 mod_timer(&priv->eof_timeout_timer, 325 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT)); 326 327 unlock: 328 spin_unlock(&priv->irqlock); 329 return IRQ_HANDLED; 330 } 331 332 static irqreturn_t csi_idmac_nfb4eof_interrupt(int irq, void *dev_id) 333 { 334 struct csi_priv *priv = dev_id; 335 336 spin_lock(&priv->irqlock); 337 338 /* 339 * this is not an unrecoverable error, just mark 340 * the next captured frame with vb2 error flag. 341 */ 342 priv->nfb4eof = true; 343 344 v4l2_err(&priv->sd, "NFB4EOF\n"); 345 346 spin_unlock(&priv->irqlock); 347 348 return IRQ_HANDLED; 349 } 350 351 /* 352 * EOF timeout timer function. This is an unrecoverable condition 353 * without a stream restart. 354 */ 355 static void csi_idmac_eof_timeout(struct timer_list *t) 356 { 357 struct csi_priv *priv = from_timer(priv, t, eof_timeout_timer); 358 struct imx_media_video_dev *vdev = priv->vdev; 359 360 v4l2_err(&priv->sd, "EOF timeout\n"); 361 362 /* signal a fatal error to capture device */ 363 imx_media_capture_device_error(vdev); 364 } 365 366 static void csi_idmac_setup_vb2_buf(struct csi_priv *priv, dma_addr_t *phys) 367 { 368 struct imx_media_video_dev *vdev = priv->vdev; 369 struct imx_media_buffer *buf; 370 int i; 371 372 for (i = 0; i < 2; i++) { 373 buf = imx_media_capture_device_next_buf(vdev); 374 if (buf) { 375 priv->active_vb2_buf[i] = buf; 376 phys[i] = vb2_dma_contig_plane_dma_addr( 377 &buf->vbuf.vb2_buf, 0); 378 } else { 379 priv->active_vb2_buf[i] = NULL; 380 phys[i] = priv->underrun_buf.phys; 381 } 382 } 383 } 384 385 static void csi_idmac_unsetup_vb2_buf(struct csi_priv *priv, 386 enum vb2_buffer_state return_status) 387 { 388 struct imx_media_buffer *buf; 389 int i; 390 391 /* return any remaining active frames with return_status */ 392 for (i = 0; i < 2; i++) { 393 buf = priv->active_vb2_buf[i]; 394 if (buf) { 395 struct vb2_buffer *vb = &buf->vbuf.vb2_buf; 396 397 vb->timestamp = ktime_get_ns(); 398 vb2_buffer_done(vb, return_status); 399 } 400 } 401 } 402 403 /* init the SMFC IDMAC channel */ 404 static int csi_idmac_setup_channel(struct csi_priv *priv) 405 { 406 struct imx_media_video_dev *vdev = priv->vdev; 407 const struct imx_media_pixfmt *incc; 408 struct v4l2_mbus_framefmt *infmt; 409 struct v4l2_mbus_framefmt *outfmt; 410 bool passthrough, interweave; 411 struct ipu_image image; 412 u32 passthrough_bits; 413 u32 passthrough_cycles; 414 dma_addr_t phys[2]; 415 u32 burst_size; 416 int ret; 417 418 infmt = &priv->format_mbus[CSI_SINK_PAD]; 419 incc = priv->cc[CSI_SINK_PAD]; 420 outfmt = &priv->format_mbus[CSI_SRC_PAD_IDMAC]; 421 422 ipu_cpmem_zero(priv->idmac_ch); 423 424 memset(&image, 0, sizeof(image)); 425 image.pix = vdev->fmt.fmt.pix; 426 image.rect = vdev->compose; 427 428 csi_idmac_setup_vb2_buf(priv, phys); 429 430 image.phys0 = phys[0]; 431 image.phys1 = phys[1]; 432 433 passthrough = requires_passthrough(&priv->upstream_ep, infmt, incc); 434 passthrough_cycles = 1; 435 436 /* 437 * If the field type at capture interface is interlaced, and 438 * the output IDMAC pad is sequential, enable interweave at 439 * the IDMAC output channel. 440 */ 441 interweave = V4L2_FIELD_IS_INTERLACED(image.pix.field) && 442 V4L2_FIELD_IS_SEQUENTIAL(outfmt->field); 443 priv->interweave_swap = interweave && 444 image.pix.field == V4L2_FIELD_INTERLACED_BT; 445 446 switch (image.pix.pixelformat) { 447 case V4L2_PIX_FMT_SBGGR8: 448 case V4L2_PIX_FMT_SGBRG8: 449 case V4L2_PIX_FMT_SGRBG8: 450 case V4L2_PIX_FMT_SRGGB8: 451 case V4L2_PIX_FMT_GREY: 452 burst_size = 16; 453 passthrough_bits = 8; 454 break; 455 case V4L2_PIX_FMT_SBGGR16: 456 case V4L2_PIX_FMT_SGBRG16: 457 case V4L2_PIX_FMT_SGRBG16: 458 case V4L2_PIX_FMT_SRGGB16: 459 case V4L2_PIX_FMT_Y10: 460 case V4L2_PIX_FMT_Y12: 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, PIXFMT_SEL_ANY); 1237 1238 switch (code->pad) { 1239 case CSI_SINK_PAD: 1240 ret = imx_media_enum_mbus_formats(&code->code, code->index, 1241 PIXFMT_SEL_ANY); 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 enum imx_pixfmt_sel fmt_sel = 1259 (incc->cs == IPUV3_COLORSPACE_YUV) ? 1260 PIXFMT_SEL_YUV : PIXFMT_SEL_RGB; 1261 1262 ret = imx_media_enum_ipu_formats(&code->code, 1263 code->index, 1264 fmt_sel); 1265 } 1266 break; 1267 default: 1268 ret = -EINVAL; 1269 } 1270 1271 out: 1272 mutex_unlock(&priv->lock); 1273 return ret; 1274 } 1275 1276 static int csi_enum_frame_size(struct v4l2_subdev *sd, 1277 struct v4l2_subdev_pad_config *cfg, 1278 struct v4l2_subdev_frame_size_enum *fse) 1279 { 1280 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1281 struct v4l2_rect *crop; 1282 int ret = 0; 1283 1284 if (fse->pad >= CSI_NUM_PADS || 1285 fse->index > (fse->pad == CSI_SINK_PAD ? 0 : 3)) 1286 return -EINVAL; 1287 1288 mutex_lock(&priv->lock); 1289 1290 if (fse->pad == CSI_SINK_PAD) { 1291 fse->min_width = MIN_W; 1292 fse->max_width = MAX_W; 1293 fse->min_height = MIN_H; 1294 fse->max_height = MAX_H; 1295 } else { 1296 crop = __csi_get_crop(priv, cfg, fse->which); 1297 1298 fse->min_width = fse->index & 1 ? 1299 crop->width / 2 : crop->width; 1300 fse->max_width = fse->min_width; 1301 fse->min_height = fse->index & 2 ? 1302 crop->height / 2 : crop->height; 1303 fse->max_height = fse->min_height; 1304 } 1305 1306 mutex_unlock(&priv->lock); 1307 return ret; 1308 } 1309 1310 static int csi_enum_frame_interval(struct v4l2_subdev *sd, 1311 struct v4l2_subdev_pad_config *cfg, 1312 struct v4l2_subdev_frame_interval_enum *fie) 1313 { 1314 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1315 struct v4l2_fract *input_fi; 1316 struct v4l2_rect *crop; 1317 int ret = 0; 1318 1319 if (fie->pad >= CSI_NUM_PADS || 1320 fie->index >= (fie->pad != CSI_SRC_PAD_IDMAC ? 1321 1 : ARRAY_SIZE(csi_skip))) 1322 return -EINVAL; 1323 1324 mutex_lock(&priv->lock); 1325 1326 input_fi = &priv->frame_interval[CSI_SINK_PAD]; 1327 crop = __csi_get_crop(priv, cfg, fie->which); 1328 1329 if ((fie->width != crop->width && fie->width != crop->width / 2) || 1330 (fie->height != crop->height && fie->height != crop->height / 2)) { 1331 ret = -EINVAL; 1332 goto out; 1333 } 1334 1335 fie->interval = *input_fi; 1336 1337 if (fie->pad == CSI_SRC_PAD_IDMAC) 1338 csi_apply_skip_interval(&csi_skip[fie->index], 1339 &fie->interval); 1340 1341 out: 1342 mutex_unlock(&priv->lock); 1343 return ret; 1344 } 1345 1346 static int csi_get_fmt(struct v4l2_subdev *sd, 1347 struct v4l2_subdev_pad_config *cfg, 1348 struct v4l2_subdev_format *sdformat) 1349 { 1350 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1351 struct v4l2_mbus_framefmt *fmt; 1352 int ret = 0; 1353 1354 if (sdformat->pad >= CSI_NUM_PADS) 1355 return -EINVAL; 1356 1357 mutex_lock(&priv->lock); 1358 1359 fmt = __csi_get_fmt(priv, cfg, sdformat->pad, sdformat->which); 1360 if (!fmt) { 1361 ret = -EINVAL; 1362 goto out; 1363 } 1364 1365 sdformat->format = *fmt; 1366 out: 1367 mutex_unlock(&priv->lock); 1368 return ret; 1369 } 1370 1371 static void csi_try_field(struct csi_priv *priv, 1372 struct v4l2_subdev_pad_config *cfg, 1373 struct v4l2_subdev_format *sdformat) 1374 { 1375 struct v4l2_mbus_framefmt *infmt = 1376 __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sdformat->which); 1377 1378 /* 1379 * no restrictions on sink pad field type except must 1380 * be initialized. 1381 */ 1382 if (sdformat->pad == CSI_SINK_PAD) { 1383 if (sdformat->format.field == V4L2_FIELD_ANY) 1384 sdformat->format.field = V4L2_FIELD_NONE; 1385 return; 1386 } 1387 1388 switch (infmt->field) { 1389 case V4L2_FIELD_SEQ_TB: 1390 case V4L2_FIELD_SEQ_BT: 1391 /* 1392 * If the user requests sequential at the source pad, 1393 * allow it (along with possibly inverting field order). 1394 * Otherwise passthrough the field type. 1395 */ 1396 if (!V4L2_FIELD_IS_SEQUENTIAL(sdformat->format.field)) 1397 sdformat->format.field = infmt->field; 1398 break; 1399 case V4L2_FIELD_ALTERNATE: 1400 /* 1401 * This driver does not support alternate field mode, and 1402 * the CSI captures a whole frame, so the CSI never presents 1403 * alternate mode at its source pads. If user has not 1404 * already requested sequential, translate ALTERNATE at 1405 * sink pad to SEQ_TB or SEQ_BT at the source pad depending 1406 * on input height (assume NTSC BT order if 480 total active 1407 * frame lines, otherwise PAL TB order). 1408 */ 1409 if (!V4L2_FIELD_IS_SEQUENTIAL(sdformat->format.field)) 1410 sdformat->format.field = (infmt->height == 480 / 2) ? 1411 V4L2_FIELD_SEQ_BT : V4L2_FIELD_SEQ_TB; 1412 break; 1413 default: 1414 /* Passthrough for all other input field types */ 1415 sdformat->format.field = infmt->field; 1416 break; 1417 } 1418 } 1419 1420 static void csi_try_fmt(struct csi_priv *priv, 1421 struct v4l2_fwnode_endpoint *upstream_ep, 1422 struct v4l2_subdev_pad_config *cfg, 1423 struct v4l2_subdev_format *sdformat, 1424 struct v4l2_rect *crop, 1425 struct v4l2_rect *compose, 1426 const struct imx_media_pixfmt **cc) 1427 { 1428 const struct imx_media_pixfmt *incc; 1429 struct v4l2_mbus_framefmt *infmt; 1430 u32 code; 1431 1432 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sdformat->which); 1433 1434 switch (sdformat->pad) { 1435 case CSI_SRC_PAD_DIRECT: 1436 case CSI_SRC_PAD_IDMAC: 1437 incc = imx_media_find_mbus_format(infmt->code, PIXFMT_SEL_ANY); 1438 1439 sdformat->format.width = compose->width; 1440 sdformat->format.height = compose->height; 1441 1442 if (requires_passthrough(upstream_ep, infmt, incc)) { 1443 sdformat->format.code = infmt->code; 1444 *cc = incc; 1445 } else { 1446 enum imx_pixfmt_sel fmt_sel = 1447 (incc->cs == IPUV3_COLORSPACE_YUV) ? 1448 PIXFMT_SEL_YUV : PIXFMT_SEL_RGB; 1449 1450 *cc = imx_media_find_ipu_format(sdformat->format.code, 1451 fmt_sel); 1452 if (!*cc) { 1453 imx_media_enum_ipu_formats(&code, 0, fmt_sel); 1454 *cc = imx_media_find_ipu_format(code, fmt_sel); 1455 sdformat->format.code = (*cc)->codes[0]; 1456 } 1457 } 1458 1459 csi_try_field(priv, cfg, sdformat); 1460 1461 /* propagate colorimetry from sink */ 1462 sdformat->format.colorspace = infmt->colorspace; 1463 sdformat->format.xfer_func = infmt->xfer_func; 1464 sdformat->format.quantization = infmt->quantization; 1465 sdformat->format.ycbcr_enc = infmt->ycbcr_enc; 1466 1467 break; 1468 case CSI_SINK_PAD: 1469 v4l_bound_align_image(&sdformat->format.width, MIN_W, MAX_W, 1470 W_ALIGN, &sdformat->format.height, 1471 MIN_H, MAX_H, H_ALIGN, S_ALIGN); 1472 1473 *cc = imx_media_find_mbus_format(sdformat->format.code, 1474 PIXFMT_SEL_ANY); 1475 if (!*cc) { 1476 imx_media_enum_mbus_formats(&code, 0, 1477 PIXFMT_SEL_YUV_RGB); 1478 *cc = imx_media_find_mbus_format(code, 1479 PIXFMT_SEL_YUV_RGB); 1480 sdformat->format.code = (*cc)->codes[0]; 1481 } 1482 1483 csi_try_field(priv, cfg, sdformat); 1484 1485 /* Reset crop and compose rectangles */ 1486 crop->left = 0; 1487 crop->top = 0; 1488 crop->width = sdformat->format.width; 1489 crop->height = sdformat->format.height; 1490 if (sdformat->format.field == V4L2_FIELD_ALTERNATE) 1491 crop->height *= 2; 1492 csi_try_crop(priv, crop, cfg, &sdformat->format, upstream_ep); 1493 compose->left = 0; 1494 compose->top = 0; 1495 compose->width = crop->width; 1496 compose->height = crop->height; 1497 1498 break; 1499 } 1500 1501 imx_media_try_colorimetry(&sdformat->format, 1502 priv->active_output_pad == CSI_SRC_PAD_DIRECT); 1503 } 1504 1505 static int csi_set_fmt(struct v4l2_subdev *sd, 1506 struct v4l2_subdev_pad_config *cfg, 1507 struct v4l2_subdev_format *sdformat) 1508 { 1509 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1510 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1511 const struct imx_media_pixfmt *cc; 1512 struct v4l2_mbus_framefmt *fmt; 1513 struct v4l2_rect *crop, *compose; 1514 int ret; 1515 1516 if (sdformat->pad >= CSI_NUM_PADS) 1517 return -EINVAL; 1518 1519 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1520 if (ret) { 1521 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1522 return ret; 1523 } 1524 1525 mutex_lock(&priv->lock); 1526 1527 if (priv->stream_count > 0) { 1528 ret = -EBUSY; 1529 goto out; 1530 } 1531 1532 crop = __csi_get_crop(priv, cfg, sdformat->which); 1533 compose = __csi_get_compose(priv, cfg, sdformat->which); 1534 1535 csi_try_fmt(priv, &upstream_ep, cfg, sdformat, crop, compose, &cc); 1536 1537 fmt = __csi_get_fmt(priv, cfg, sdformat->pad, sdformat->which); 1538 *fmt = sdformat->format; 1539 1540 if (sdformat->pad == CSI_SINK_PAD) { 1541 int pad; 1542 1543 /* propagate format to source pads */ 1544 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) { 1545 const struct imx_media_pixfmt *outcc; 1546 struct v4l2_mbus_framefmt *outfmt; 1547 struct v4l2_subdev_format format; 1548 1549 format.pad = pad; 1550 format.which = sdformat->which; 1551 format.format = sdformat->format; 1552 csi_try_fmt(priv, &upstream_ep, cfg, &format, 1553 NULL, compose, &outcc); 1554 1555 outfmt = __csi_get_fmt(priv, cfg, pad, sdformat->which); 1556 *outfmt = format.format; 1557 1558 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE) 1559 priv->cc[pad] = outcc; 1560 } 1561 } 1562 1563 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE) 1564 priv->cc[sdformat->pad] = cc; 1565 1566 out: 1567 mutex_unlock(&priv->lock); 1568 return ret; 1569 } 1570 1571 static int csi_get_selection(struct v4l2_subdev *sd, 1572 struct v4l2_subdev_pad_config *cfg, 1573 struct v4l2_subdev_selection *sel) 1574 { 1575 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1576 struct v4l2_mbus_framefmt *infmt; 1577 struct v4l2_rect *crop, *compose; 1578 int ret = 0; 1579 1580 if (sel->pad != CSI_SINK_PAD) 1581 return -EINVAL; 1582 1583 mutex_lock(&priv->lock); 1584 1585 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sel->which); 1586 crop = __csi_get_crop(priv, cfg, sel->which); 1587 compose = __csi_get_compose(priv, cfg, sel->which); 1588 1589 switch (sel->target) { 1590 case V4L2_SEL_TGT_CROP_BOUNDS: 1591 sel->r.left = 0; 1592 sel->r.top = 0; 1593 sel->r.width = infmt->width; 1594 sel->r.height = infmt->height; 1595 if (infmt->field == V4L2_FIELD_ALTERNATE) 1596 sel->r.height *= 2; 1597 break; 1598 case V4L2_SEL_TGT_CROP: 1599 sel->r = *crop; 1600 break; 1601 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 1602 sel->r.left = 0; 1603 sel->r.top = 0; 1604 sel->r.width = crop->width; 1605 sel->r.height = crop->height; 1606 break; 1607 case V4L2_SEL_TGT_COMPOSE: 1608 sel->r = *compose; 1609 break; 1610 default: 1611 ret = -EINVAL; 1612 } 1613 1614 mutex_unlock(&priv->lock); 1615 return ret; 1616 } 1617 1618 static int csi_set_scale(u32 *compose, u32 crop, u32 flags) 1619 { 1620 if ((flags & (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE)) == 1621 (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE) && 1622 *compose != crop && *compose != crop / 2) 1623 return -ERANGE; 1624 1625 if (*compose <= crop / 2 || 1626 (*compose < crop * 3 / 4 && !(flags & V4L2_SEL_FLAG_GE)) || 1627 (*compose < crop && (flags & V4L2_SEL_FLAG_LE))) 1628 *compose = crop / 2; 1629 else 1630 *compose = crop; 1631 1632 return 0; 1633 } 1634 1635 static int csi_set_selection(struct v4l2_subdev *sd, 1636 struct v4l2_subdev_pad_config *cfg, 1637 struct v4l2_subdev_selection *sel) 1638 { 1639 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1640 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1641 struct v4l2_mbus_framefmt *infmt; 1642 struct v4l2_rect *crop, *compose; 1643 int pad, ret; 1644 1645 if (sel->pad != CSI_SINK_PAD) 1646 return -EINVAL; 1647 1648 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1649 if (ret) { 1650 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1651 return ret; 1652 } 1653 1654 mutex_lock(&priv->lock); 1655 1656 if (priv->stream_count > 0) { 1657 ret = -EBUSY; 1658 goto out; 1659 } 1660 1661 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sel->which); 1662 crop = __csi_get_crop(priv, cfg, sel->which); 1663 compose = __csi_get_compose(priv, cfg, sel->which); 1664 1665 switch (sel->target) { 1666 case V4L2_SEL_TGT_CROP: 1667 /* 1668 * Modifying the crop rectangle always changes the format on 1669 * the source pads. If the KEEP_CONFIG flag is set, just return 1670 * the current crop rectangle. 1671 */ 1672 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) { 1673 sel->r = priv->crop; 1674 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1675 *crop = sel->r; 1676 goto out; 1677 } 1678 1679 csi_try_crop(priv, &sel->r, cfg, infmt, &upstream_ep); 1680 1681 *crop = sel->r; 1682 1683 /* Reset scaling to 1:1 */ 1684 compose->width = crop->width; 1685 compose->height = crop->height; 1686 break; 1687 case V4L2_SEL_TGT_COMPOSE: 1688 /* 1689 * Modifying the compose rectangle always changes the format on 1690 * the source pads. If the KEEP_CONFIG flag is set, just return 1691 * the current compose rectangle. 1692 */ 1693 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) { 1694 sel->r = priv->compose; 1695 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1696 *compose = sel->r; 1697 goto out; 1698 } 1699 1700 sel->r.left = 0; 1701 sel->r.top = 0; 1702 ret = csi_set_scale(&sel->r.width, crop->width, sel->flags); 1703 if (ret) 1704 goto out; 1705 ret = csi_set_scale(&sel->r.height, crop->height, sel->flags); 1706 if (ret) 1707 goto out; 1708 1709 *compose = sel->r; 1710 break; 1711 default: 1712 ret = -EINVAL; 1713 goto out; 1714 } 1715 1716 /* Reset source pads to sink compose rectangle */ 1717 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) { 1718 struct v4l2_mbus_framefmt *outfmt; 1719 1720 outfmt = __csi_get_fmt(priv, cfg, pad, sel->which); 1721 outfmt->width = compose->width; 1722 outfmt->height = compose->height; 1723 } 1724 1725 out: 1726 mutex_unlock(&priv->lock); 1727 return ret; 1728 } 1729 1730 static int csi_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, 1731 struct v4l2_event_subscription *sub) 1732 { 1733 if (sub->type != V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR) 1734 return -EINVAL; 1735 if (sub->id != 0) 1736 return -EINVAL; 1737 1738 return v4l2_event_subscribe(fh, sub, 0, NULL); 1739 } 1740 1741 static int csi_unsubscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, 1742 struct v4l2_event_subscription *sub) 1743 { 1744 return v4l2_event_unsubscribe(fh, sub); 1745 } 1746 1747 static int csi_registered(struct v4l2_subdev *sd) 1748 { 1749 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1750 struct ipu_csi *csi; 1751 int i, ret; 1752 u32 code; 1753 1754 /* get handle to IPU CSI */ 1755 csi = ipu_csi_get(priv->ipu, priv->csi_id); 1756 if (IS_ERR(csi)) { 1757 v4l2_err(&priv->sd, "failed to get CSI%d\n", priv->csi_id); 1758 return PTR_ERR(csi); 1759 } 1760 priv->csi = csi; 1761 1762 for (i = 0; i < CSI_NUM_PADS; i++) { 1763 code = 0; 1764 if (i != CSI_SINK_PAD) 1765 imx_media_enum_ipu_formats(&code, 0, PIXFMT_SEL_YUV); 1766 1767 /* set a default mbus format */ 1768 ret = imx_media_init_mbus_fmt(&priv->format_mbus[i], 1769 640, 480, code, V4L2_FIELD_NONE, 1770 &priv->cc[i]); 1771 if (ret) 1772 goto put_csi; 1773 1774 /* init default frame interval */ 1775 priv->frame_interval[i].numerator = 1; 1776 priv->frame_interval[i].denominator = 30; 1777 } 1778 1779 /* disable frame skipping */ 1780 priv->skip = &csi_skip[0]; 1781 1782 /* init default crop and compose rectangle sizes */ 1783 priv->crop.width = 640; 1784 priv->crop.height = 480; 1785 priv->compose.width = 640; 1786 priv->compose.height = 480; 1787 1788 priv->fim = imx_media_fim_init(&priv->sd); 1789 if (IS_ERR(priv->fim)) { 1790 ret = PTR_ERR(priv->fim); 1791 goto put_csi; 1792 } 1793 1794 priv->vdev = imx_media_capture_device_init(priv->sd.dev, 1795 &priv->sd, 1796 CSI_SRC_PAD_IDMAC); 1797 if (IS_ERR(priv->vdev)) { 1798 ret = PTR_ERR(priv->vdev); 1799 goto free_fim; 1800 } 1801 1802 ret = imx_media_capture_device_register(priv->vdev); 1803 if (ret) 1804 goto remove_vdev; 1805 1806 return 0; 1807 1808 remove_vdev: 1809 imx_media_capture_device_remove(priv->vdev); 1810 free_fim: 1811 if (priv->fim) 1812 imx_media_fim_free(priv->fim); 1813 put_csi: 1814 ipu_csi_put(priv->csi); 1815 return ret; 1816 } 1817 1818 static void csi_unregistered(struct v4l2_subdev *sd) 1819 { 1820 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1821 1822 imx_media_capture_device_unregister(priv->vdev); 1823 imx_media_capture_device_remove(priv->vdev); 1824 1825 if (priv->fim) 1826 imx_media_fim_free(priv->fim); 1827 1828 if (priv->csi) 1829 ipu_csi_put(priv->csi); 1830 } 1831 1832 /* 1833 * The CSI has only one fwnode endpoint, at the sink pad. Verify the 1834 * endpoint belongs to us, and return CSI_SINK_PAD. 1835 */ 1836 static int csi_get_fwnode_pad(struct media_entity *entity, 1837 struct fwnode_endpoint *endpoint) 1838 { 1839 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); 1840 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1841 struct fwnode_handle *csi_port = dev_fwnode(priv->dev); 1842 struct fwnode_handle *csi_ep; 1843 int ret; 1844 1845 csi_ep = fwnode_get_next_child_node(csi_port, NULL); 1846 1847 ret = endpoint->local_fwnode == csi_ep ? CSI_SINK_PAD : -ENXIO; 1848 1849 fwnode_handle_put(csi_ep); 1850 1851 return ret; 1852 } 1853 1854 static const struct media_entity_operations csi_entity_ops = { 1855 .link_setup = csi_link_setup, 1856 .link_validate = v4l2_subdev_link_validate, 1857 .get_fwnode_pad = csi_get_fwnode_pad, 1858 }; 1859 1860 static const struct v4l2_subdev_core_ops csi_core_ops = { 1861 .subscribe_event = csi_subscribe_event, 1862 .unsubscribe_event = csi_unsubscribe_event, 1863 }; 1864 1865 static const struct v4l2_subdev_video_ops csi_video_ops = { 1866 .g_frame_interval = csi_g_frame_interval, 1867 .s_frame_interval = csi_s_frame_interval, 1868 .s_stream = csi_s_stream, 1869 }; 1870 1871 static const struct v4l2_subdev_pad_ops csi_pad_ops = { 1872 .init_cfg = imx_media_init_cfg, 1873 .enum_mbus_code = csi_enum_mbus_code, 1874 .enum_frame_size = csi_enum_frame_size, 1875 .enum_frame_interval = csi_enum_frame_interval, 1876 .get_fmt = csi_get_fmt, 1877 .set_fmt = csi_set_fmt, 1878 .get_selection = csi_get_selection, 1879 .set_selection = csi_set_selection, 1880 .link_validate = csi_link_validate, 1881 }; 1882 1883 static const struct v4l2_subdev_ops csi_subdev_ops = { 1884 .core = &csi_core_ops, 1885 .video = &csi_video_ops, 1886 .pad = &csi_pad_ops, 1887 }; 1888 1889 static const struct v4l2_subdev_internal_ops csi_internal_ops = { 1890 .registered = csi_registered, 1891 .unregistered = csi_unregistered, 1892 }; 1893 1894 static int imx_csi_notify_bound(struct v4l2_async_notifier *notifier, 1895 struct v4l2_subdev *sd, 1896 struct v4l2_async_subdev *asd) 1897 { 1898 struct csi_priv *priv = notifier_to_dev(notifier); 1899 struct media_pad *sink = &priv->sd.entity.pads[CSI_SINK_PAD]; 1900 1901 /* 1902 * If the subdev is a video mux, it must be one of the CSI 1903 * muxes. Mark it as such via its group id. 1904 */ 1905 if (sd->entity.function == MEDIA_ENT_F_VID_MUX) 1906 sd->grp_id = IMX_MEDIA_GRP_ID_CSI_MUX; 1907 1908 return v4l2_create_fwnode_links_to_pad(sd, sink); 1909 } 1910 1911 static const struct v4l2_async_notifier_operations csi_notify_ops = { 1912 .bound = imx_csi_notify_bound, 1913 }; 1914 1915 static int imx_csi_async_register(struct csi_priv *priv) 1916 { 1917 struct v4l2_async_subdev *asd = NULL; 1918 struct fwnode_handle *ep; 1919 unsigned int port; 1920 int ret; 1921 1922 v4l2_async_notifier_init(&priv->notifier); 1923 1924 /* get this CSI's port id */ 1925 ret = fwnode_property_read_u32(dev_fwnode(priv->dev), "reg", &port); 1926 if (ret < 0) 1927 return ret; 1928 1929 ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(priv->dev->parent), 1930 port, 0, 1931 FWNODE_GRAPH_ENDPOINT_NEXT); 1932 if (ep) { 1933 asd = kzalloc(sizeof(*asd), GFP_KERNEL); 1934 if (!asd) { 1935 fwnode_handle_put(ep); 1936 return -ENOMEM; 1937 } 1938 1939 ret = v4l2_async_notifier_add_fwnode_remote_subdev( 1940 &priv->notifier, ep, asd); 1941 1942 fwnode_handle_put(ep); 1943 1944 if (ret) { 1945 kfree(asd); 1946 /* OK if asd already exists */ 1947 if (ret != -EEXIST) 1948 return ret; 1949 } 1950 } 1951 1952 priv->notifier.ops = &csi_notify_ops; 1953 1954 ret = v4l2_async_subdev_notifier_register(&priv->sd, 1955 &priv->notifier); 1956 if (ret) 1957 return ret; 1958 1959 return v4l2_async_register_subdev(&priv->sd); 1960 } 1961 1962 static int imx_csi_probe(struct platform_device *pdev) 1963 { 1964 struct ipu_client_platformdata *pdata; 1965 struct pinctrl *pinctrl; 1966 struct csi_priv *priv; 1967 int i, ret; 1968 1969 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 1970 if (!priv) 1971 return -ENOMEM; 1972 1973 platform_set_drvdata(pdev, &priv->sd); 1974 priv->dev = &pdev->dev; 1975 1976 ret = dma_set_coherent_mask(priv->dev, DMA_BIT_MASK(32)); 1977 if (ret) 1978 return ret; 1979 1980 /* get parent IPU */ 1981 priv->ipu = dev_get_drvdata(priv->dev->parent); 1982 1983 /* get our CSI id */ 1984 pdata = priv->dev->platform_data; 1985 priv->csi_id = pdata->csi; 1986 priv->smfc_id = (priv->csi_id == 0) ? 0 : 2; 1987 1988 priv->active_output_pad = CSI_SRC_PAD_IDMAC; 1989 1990 timer_setup(&priv->eof_timeout_timer, csi_idmac_eof_timeout, 0); 1991 spin_lock_init(&priv->irqlock); 1992 1993 v4l2_subdev_init(&priv->sd, &csi_subdev_ops); 1994 v4l2_set_subdevdata(&priv->sd, priv); 1995 priv->sd.internal_ops = &csi_internal_ops; 1996 priv->sd.entity.ops = &csi_entity_ops; 1997 priv->sd.entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER; 1998 priv->sd.dev = &pdev->dev; 1999 priv->sd.fwnode = of_fwnode_handle(pdata->of_node); 2000 priv->sd.owner = THIS_MODULE; 2001 priv->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; 2002 priv->sd.grp_id = priv->csi_id ? 2003 IMX_MEDIA_GRP_ID_IPU_CSI1 : IMX_MEDIA_GRP_ID_IPU_CSI0; 2004 imx_media_grp_id_to_sd_name(priv->sd.name, sizeof(priv->sd.name), 2005 priv->sd.grp_id, ipu_get_num(priv->ipu)); 2006 2007 for (i = 0; i < CSI_NUM_PADS; i++) 2008 priv->pad[i].flags = (i == CSI_SINK_PAD) ? 2009 MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE; 2010 2011 ret = media_entity_pads_init(&priv->sd.entity, CSI_NUM_PADS, 2012 priv->pad); 2013 if (ret) 2014 return ret; 2015 2016 mutex_init(&priv->lock); 2017 2018 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0); 2019 priv->sd.ctrl_handler = &priv->ctrl_hdlr; 2020 2021 /* 2022 * The IPUv3 driver did not assign an of_node to this 2023 * device. As a result, pinctrl does not automatically 2024 * configure our pin groups, so we need to do that manually 2025 * here, after setting this device's of_node. 2026 */ 2027 priv->dev->of_node = pdata->of_node; 2028 pinctrl = devm_pinctrl_get_select_default(priv->dev); 2029 if (IS_ERR(pinctrl)) { 2030 ret = PTR_ERR(pinctrl); 2031 dev_dbg(priv->dev, 2032 "devm_pinctrl_get_select_default() failed: %d\n", ret); 2033 if (ret != -ENODEV) 2034 goto free; 2035 } 2036 2037 ret = imx_csi_async_register(priv); 2038 if (ret) 2039 goto cleanup; 2040 2041 return 0; 2042 2043 cleanup: 2044 v4l2_async_notifier_unregister(&priv->notifier); 2045 v4l2_async_notifier_cleanup(&priv->notifier); 2046 free: 2047 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 2048 mutex_destroy(&priv->lock); 2049 return ret; 2050 } 2051 2052 static int imx_csi_remove(struct platform_device *pdev) 2053 { 2054 struct v4l2_subdev *sd = platform_get_drvdata(pdev); 2055 struct csi_priv *priv = sd_to_dev(sd); 2056 2057 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 2058 mutex_destroy(&priv->lock); 2059 v4l2_async_notifier_unregister(&priv->notifier); 2060 v4l2_async_notifier_cleanup(&priv->notifier); 2061 v4l2_async_unregister_subdev(sd); 2062 media_entity_cleanup(&sd->entity); 2063 2064 return 0; 2065 } 2066 2067 static const struct platform_device_id imx_csi_ids[] = { 2068 { .name = "imx-ipuv3-csi" }, 2069 { }, 2070 }; 2071 MODULE_DEVICE_TABLE(platform, imx_csi_ids); 2072 2073 static struct platform_driver imx_csi_driver = { 2074 .probe = imx_csi_probe, 2075 .remove = imx_csi_remove, 2076 .id_table = imx_csi_ids, 2077 .driver = { 2078 .name = "imx-ipuv3-csi", 2079 }, 2080 }; 2081 module_platform_driver(imx_csi_driver); 2082 2083 MODULE_DESCRIPTION("i.MX CSI subdev driver"); 2084 MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>"); 2085 MODULE_LICENSE("GPL"); 2086 MODULE_ALIAS("platform:imx-ipuv3-csi"); 2087