1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * V4L2 Capture CSI Subdev for Freescale i.MX5/6 SOC 4 * 5 * Copyright (c) 2014-2017 Mentor Graphics Inc. 6 * Copyright (C) 2017 Pengutronix, Philipp Zabel <kernel@pengutronix.de> 7 */ 8 #include <linux/delay.h> 9 #include <linux/gcd.h> 10 #include <linux/interrupt.h> 11 #include <linux/module.h> 12 #include <linux/of_graph.h> 13 #include <linux/pinctrl/consumer.h> 14 #include <linux/platform_device.h> 15 #include <media/v4l2-ctrls.h> 16 #include <media/v4l2-device.h> 17 #include <media/v4l2-event.h> 18 #include <media/v4l2-fwnode.h> 19 #include <media/v4l2-mc.h> 20 #include <media/v4l2-subdev.h> 21 #include <media/videobuf2-dma-contig.h> 22 #include <video/imx-ipu-v3.h> 23 #include <media/imx.h> 24 #include "imx-media.h" 25 26 /* 27 * Min/Max supported width and heights. 28 * 29 * We allow planar output, so we have to align width by 16 pixels 30 * to meet IDMAC alignment requirements. 31 * 32 * TODO: move this into pad format negotiation, if capture device 33 * has not requested planar formats, we should allow 8 pixel 34 * alignment. 35 */ 36 #define MIN_W 32 37 #define MIN_H 32 38 #define MAX_W 4096 39 #define MAX_H 4096 40 #define W_ALIGN 1 /* multiple of 2 pixels */ 41 #define H_ALIGN 1 /* multiple of 2 lines */ 42 #define S_ALIGN 1 /* multiple of 2 */ 43 44 /* 45 * struct csi_skip_desc - CSI frame skipping descriptor 46 * @keep - number of frames kept per max_ratio frames 47 * @max_ratio - width of skip_smfc, written to MAX_RATIO bitfield 48 * @skip_smfc - skip pattern written to the SKIP_SMFC bitfield 49 */ 50 struct csi_skip_desc { 51 u8 keep; 52 u8 max_ratio; 53 u8 skip_smfc; 54 }; 55 56 struct csi_priv { 57 struct device *dev; 58 struct ipu_soc *ipu; 59 struct v4l2_subdev sd; 60 struct media_pad pad[CSI_NUM_PADS]; 61 struct v4l2_async_notifier notifier; 62 63 /* the video device at IDMAC output pad */ 64 struct imx_media_video_dev *vdev; 65 struct imx_media_fim *fim; 66 int csi_id; 67 int smfc_id; 68 69 /* lock to protect all members below */ 70 struct mutex lock; 71 72 int active_output_pad; 73 74 struct ipuv3_channel *idmac_ch; 75 struct ipu_smfc *smfc; 76 struct ipu_csi *csi; 77 78 struct v4l2_mbus_framefmt format_mbus[CSI_NUM_PADS]; 79 const struct imx_media_pixfmt *cc[CSI_NUM_PADS]; 80 struct v4l2_fract frame_interval[CSI_NUM_PADS]; 81 struct v4l2_rect crop; 82 struct v4l2_rect compose; 83 const struct csi_skip_desc *skip; 84 85 /* active vb2 buffers to send to video dev sink */ 86 struct imx_media_buffer *active_vb2_buf[2]; 87 struct imx_media_dma_buf underrun_buf; 88 89 int ipu_buf_num; /* ipu double buffer index: 0-1 */ 90 91 /* the sink for the captured frames */ 92 struct media_entity *sink; 93 enum ipu_csi_dest dest; 94 /* the source subdev */ 95 struct v4l2_subdev *src_sd; 96 97 /* the mipi virtual channel number at link validate */ 98 int vc_num; 99 100 /* the upstream endpoint CSI is receiving from */ 101 struct v4l2_fwnode_endpoint upstream_ep; 102 103 spinlock_t irqlock; /* protect eof_irq handler */ 104 struct timer_list eof_timeout_timer; 105 int eof_irq; 106 int nfb4eof_irq; 107 108 struct v4l2_ctrl_handler ctrl_hdlr; 109 110 int stream_count; /* streaming counter */ 111 u32 frame_sequence; /* frame sequence counter */ 112 bool last_eof; /* waiting for last EOF at stream off */ 113 bool nfb4eof; /* NFB4EOF encountered during streaming */ 114 bool interweave_swap; /* swap top/bottom lines when interweaving */ 115 struct completion last_eof_comp; 116 }; 117 118 static inline struct csi_priv *sd_to_dev(struct v4l2_subdev *sdev) 119 { 120 return container_of(sdev, struct csi_priv, sd); 121 } 122 123 static inline struct csi_priv *notifier_to_dev(struct v4l2_async_notifier *n) 124 { 125 return container_of(n, struct csi_priv, notifier); 126 } 127 128 static inline bool is_parallel_bus(struct v4l2_fwnode_endpoint *ep) 129 { 130 return ep->bus_type != V4L2_MBUS_CSI2_DPHY; 131 } 132 133 static inline bool is_parallel_16bit_bus(struct v4l2_fwnode_endpoint *ep) 134 { 135 return is_parallel_bus(ep) && ep->bus.parallel.bus_width >= 16; 136 } 137 138 /* 139 * Check for conditions that require the IPU to handle the 140 * data internally as generic data, aka passthrough mode: 141 * - raw bayer media bus formats, or 142 * - BT.656 and BT.1120 (8/10-bit YUV422) data can always be processed 143 * on-the-fly 144 * - the CSI is receiving from a 16-bit parallel bus, or 145 * - the CSI is receiving from an 8-bit parallel bus and the incoming 146 * media bus format is other than UYVY8_2X8/YUYV8_2X8. 147 */ 148 static inline bool requires_passthrough(struct v4l2_fwnode_endpoint *ep, 149 struct v4l2_mbus_framefmt *infmt, 150 const struct imx_media_pixfmt *incc) 151 { 152 if (ep->bus_type == V4L2_MBUS_BT656) // including BT.1120 153 return false; 154 155 return incc->bayer || is_parallel_16bit_bus(ep) || 156 (is_parallel_bus(ep) && 157 infmt->code != MEDIA_BUS_FMT_UYVY8_2X8 && 158 infmt->code != MEDIA_BUS_FMT_YUYV8_2X8); 159 } 160 161 /* 162 * Parses the fwnode endpoint from the source pad of the entity 163 * connected to this CSI. This will either be the entity directly 164 * upstream from the CSI-2 receiver, directly upstream from the 165 * video mux, or directly upstream from the CSI itself. The endpoint 166 * is needed to determine the bus type and bus config coming into 167 * the CSI. 168 */ 169 static int csi_get_upstream_endpoint(struct csi_priv *priv, 170 struct v4l2_fwnode_endpoint *ep) 171 { 172 struct fwnode_handle *endpoint; 173 struct v4l2_subdev *sd; 174 struct media_pad *pad; 175 176 if (!IS_ENABLED(CONFIG_OF)) 177 return -ENXIO; 178 179 if (!priv->src_sd) 180 return -EPIPE; 181 182 sd = priv->src_sd; 183 184 switch (sd->grp_id) { 185 case IMX_MEDIA_GRP_ID_CSI_MUX: 186 /* 187 * CSI is connected directly to CSI mux, skip up to 188 * CSI-2 receiver if it is in the path, otherwise stay 189 * with the CSI mux. 190 */ 191 sd = imx_media_pipeline_subdev(&sd->entity, 192 IMX_MEDIA_GRP_ID_CSI2, 193 true); 194 if (IS_ERR(sd)) 195 sd = priv->src_sd; 196 break; 197 case IMX_MEDIA_GRP_ID_CSI2: 198 break; 199 default: 200 /* 201 * the source is neither the CSI mux nor the CSI-2 receiver, 202 * get the source pad directly upstream from CSI itself. 203 */ 204 sd = &priv->sd; 205 break; 206 } 207 208 /* get source pad of entity directly upstream from sd */ 209 pad = imx_media_pipeline_pad(&sd->entity, 0, 0, true); 210 if (!pad) 211 return -ENODEV; 212 213 endpoint = imx_media_get_pad_fwnode(pad); 214 if (IS_ERR(endpoint)) 215 return PTR_ERR(endpoint); 216 217 v4l2_fwnode_endpoint_parse(endpoint, ep); 218 219 fwnode_handle_put(endpoint); 220 221 return 0; 222 } 223 224 static void csi_idmac_put_ipu_resources(struct csi_priv *priv) 225 { 226 if (priv->idmac_ch) 227 ipu_idmac_put(priv->idmac_ch); 228 priv->idmac_ch = NULL; 229 230 if (priv->smfc) 231 ipu_smfc_put(priv->smfc); 232 priv->smfc = NULL; 233 } 234 235 static int csi_idmac_get_ipu_resources(struct csi_priv *priv) 236 { 237 int ch_num, ret; 238 struct ipu_smfc *smfc; 239 struct ipuv3_channel *idmac_ch; 240 241 ch_num = IPUV3_CHANNEL_CSI0 + priv->smfc_id; 242 243 smfc = ipu_smfc_get(priv->ipu, ch_num); 244 if (IS_ERR(smfc)) { 245 v4l2_err(&priv->sd, "failed to get SMFC\n"); 246 ret = PTR_ERR(smfc); 247 goto out; 248 } 249 priv->smfc = smfc; 250 251 idmac_ch = ipu_idmac_get(priv->ipu, ch_num); 252 if (IS_ERR(idmac_ch)) { 253 v4l2_err(&priv->sd, "could not get IDMAC channel %u\n", 254 ch_num); 255 ret = PTR_ERR(idmac_ch); 256 goto out; 257 } 258 priv->idmac_ch = idmac_ch; 259 260 return 0; 261 out: 262 csi_idmac_put_ipu_resources(priv); 263 return ret; 264 } 265 266 static void csi_vb2_buf_done(struct csi_priv *priv) 267 { 268 struct imx_media_video_dev *vdev = priv->vdev; 269 struct imx_media_buffer *done, *next; 270 struct vb2_buffer *vb; 271 dma_addr_t phys; 272 273 done = priv->active_vb2_buf[priv->ipu_buf_num]; 274 if (done) { 275 done->vbuf.field = vdev->fmt.field; 276 done->vbuf.sequence = priv->frame_sequence; 277 vb = &done->vbuf.vb2_buf; 278 vb->timestamp = ktime_get_ns(); 279 vb2_buffer_done(vb, priv->nfb4eof ? 280 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); 281 } 282 283 priv->frame_sequence++; 284 priv->nfb4eof = false; 285 286 /* get next queued buffer */ 287 next = imx_media_capture_device_next_buf(vdev); 288 if (next) { 289 phys = vb2_dma_contig_plane_dma_addr(&next->vbuf.vb2_buf, 0); 290 priv->active_vb2_buf[priv->ipu_buf_num] = next; 291 } else { 292 phys = priv->underrun_buf.phys; 293 priv->active_vb2_buf[priv->ipu_buf_num] = NULL; 294 } 295 296 if (ipu_idmac_buffer_is_ready(priv->idmac_ch, priv->ipu_buf_num)) 297 ipu_idmac_clear_buffer(priv->idmac_ch, priv->ipu_buf_num); 298 299 if (priv->interweave_swap) 300 phys += vdev->fmt.bytesperline; 301 302 ipu_cpmem_set_buffer(priv->idmac_ch, priv->ipu_buf_num, phys); 303 } 304 305 static irqreturn_t csi_idmac_eof_interrupt(int irq, void *dev_id) 306 { 307 struct csi_priv *priv = dev_id; 308 309 spin_lock(&priv->irqlock); 310 311 if (priv->last_eof) { 312 complete(&priv->last_eof_comp); 313 priv->last_eof = false; 314 goto unlock; 315 } 316 317 if (priv->fim) 318 /* call frame interval monitor */ 319 imx_media_fim_eof_monitor(priv->fim, ktime_get()); 320 321 csi_vb2_buf_done(priv); 322 323 /* select new IPU buf */ 324 ipu_idmac_select_buffer(priv->idmac_ch, priv->ipu_buf_num); 325 /* toggle IPU double-buffer index */ 326 priv->ipu_buf_num ^= 1; 327 328 /* bump the EOF timeout timer */ 329 mod_timer(&priv->eof_timeout_timer, 330 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT)); 331 332 unlock: 333 spin_unlock(&priv->irqlock); 334 return IRQ_HANDLED; 335 } 336 337 static irqreturn_t csi_idmac_nfb4eof_interrupt(int irq, void *dev_id) 338 { 339 struct csi_priv *priv = dev_id; 340 341 spin_lock(&priv->irqlock); 342 343 /* 344 * this is not an unrecoverable error, just mark 345 * the next captured frame with vb2 error flag. 346 */ 347 priv->nfb4eof = true; 348 349 v4l2_err(&priv->sd, "NFB4EOF\n"); 350 351 spin_unlock(&priv->irqlock); 352 353 return IRQ_HANDLED; 354 } 355 356 /* 357 * EOF timeout timer function. This is an unrecoverable condition 358 * without a stream restart. 359 */ 360 static void csi_idmac_eof_timeout(struct timer_list *t) 361 { 362 struct csi_priv *priv = from_timer(priv, t, eof_timeout_timer); 363 struct imx_media_video_dev *vdev = priv->vdev; 364 365 v4l2_err(&priv->sd, "EOF timeout\n"); 366 367 /* signal a fatal error to capture device */ 368 imx_media_capture_device_error(vdev); 369 } 370 371 static void csi_idmac_setup_vb2_buf(struct csi_priv *priv, dma_addr_t *phys) 372 { 373 struct imx_media_video_dev *vdev = priv->vdev; 374 struct imx_media_buffer *buf; 375 int i; 376 377 for (i = 0; i < 2; i++) { 378 buf = imx_media_capture_device_next_buf(vdev); 379 if (buf) { 380 priv->active_vb2_buf[i] = buf; 381 phys[i] = vb2_dma_contig_plane_dma_addr( 382 &buf->vbuf.vb2_buf, 0); 383 } else { 384 priv->active_vb2_buf[i] = NULL; 385 phys[i] = priv->underrun_buf.phys; 386 } 387 } 388 } 389 390 static void csi_idmac_unsetup_vb2_buf(struct csi_priv *priv, 391 enum vb2_buffer_state return_status) 392 { 393 struct imx_media_buffer *buf; 394 int i; 395 396 /* return any remaining active frames with return_status */ 397 for (i = 0; i < 2; i++) { 398 buf = priv->active_vb2_buf[i]; 399 if (buf) { 400 struct vb2_buffer *vb = &buf->vbuf.vb2_buf; 401 402 vb->timestamp = ktime_get_ns(); 403 vb2_buffer_done(vb, return_status); 404 } 405 } 406 } 407 408 /* init the SMFC IDMAC channel */ 409 static int csi_idmac_setup_channel(struct csi_priv *priv) 410 { 411 struct imx_media_video_dev *vdev = priv->vdev; 412 const struct imx_media_pixfmt *incc; 413 struct v4l2_mbus_framefmt *infmt; 414 struct v4l2_mbus_framefmt *outfmt; 415 bool passthrough, interweave; 416 struct ipu_image image; 417 u32 passthrough_bits; 418 u32 passthrough_cycles; 419 dma_addr_t phys[2]; 420 u32 burst_size; 421 int ret; 422 423 infmt = &priv->format_mbus[CSI_SINK_PAD]; 424 incc = priv->cc[CSI_SINK_PAD]; 425 outfmt = &priv->format_mbus[CSI_SRC_PAD_IDMAC]; 426 427 ipu_cpmem_zero(priv->idmac_ch); 428 429 memset(&image, 0, sizeof(image)); 430 image.pix = vdev->fmt; 431 image.rect = vdev->compose; 432 433 csi_idmac_setup_vb2_buf(priv, phys); 434 435 image.phys0 = phys[0]; 436 image.phys1 = phys[1]; 437 438 passthrough = requires_passthrough(&priv->upstream_ep, infmt, incc); 439 passthrough_cycles = 1; 440 441 /* 442 * If the field type at capture interface is interlaced, and 443 * the output IDMAC pad is sequential, enable interweave at 444 * the IDMAC output channel. 445 */ 446 interweave = V4L2_FIELD_IS_INTERLACED(image.pix.field) && 447 V4L2_FIELD_IS_SEQUENTIAL(outfmt->field); 448 priv->interweave_swap = interweave && 449 image.pix.field == V4L2_FIELD_INTERLACED_BT; 450 451 switch (image.pix.pixelformat) { 452 case V4L2_PIX_FMT_SBGGR8: 453 case V4L2_PIX_FMT_SGBRG8: 454 case V4L2_PIX_FMT_SGRBG8: 455 case V4L2_PIX_FMT_SRGGB8: 456 case V4L2_PIX_FMT_GREY: 457 burst_size = 16; 458 passthrough_bits = 8; 459 break; 460 case V4L2_PIX_FMT_SBGGR16: 461 case V4L2_PIX_FMT_SGBRG16: 462 case V4L2_PIX_FMT_SGRBG16: 463 case V4L2_PIX_FMT_SRGGB16: 464 case V4L2_PIX_FMT_Y10: 465 case V4L2_PIX_FMT_Y12: 466 burst_size = 8; 467 passthrough_bits = 16; 468 break; 469 case V4L2_PIX_FMT_YUV420: 470 case V4L2_PIX_FMT_YVU420: 471 case V4L2_PIX_FMT_NV12: 472 burst_size = (image.pix.width & 0x3f) ? 473 ((image.pix.width & 0x1f) ? 474 ((image.pix.width & 0xf) ? 8 : 16) : 32) : 64; 475 passthrough_bits = 16; 476 /* 477 * Skip writing U and V components to odd rows (but not 478 * when enabling IDMAC interweaving, they are incompatible). 479 */ 480 if (!interweave) 481 ipu_cpmem_skip_odd_chroma_rows(priv->idmac_ch); 482 break; 483 case V4L2_PIX_FMT_YUYV: 484 case V4L2_PIX_FMT_UYVY: 485 burst_size = (image.pix.width & 0x1f) ? 486 ((image.pix.width & 0xf) ? 8 : 16) : 32; 487 passthrough_bits = 16; 488 break; 489 case V4L2_PIX_FMT_RGB565: 490 if (passthrough) { 491 burst_size = 16; 492 passthrough_bits = 8; 493 passthrough_cycles = incc->cycles; 494 break; 495 } 496 fallthrough; /* non-passthrough RGB565 (CSI-2 bus) */ 497 default: 498 burst_size = (image.pix.width & 0xf) ? 8 : 16; 499 passthrough_bits = 16; 500 break; 501 } 502 503 if (passthrough) { 504 if (priv->interweave_swap) { 505 /* start interweave scan at 1st top line (2nd line) */ 506 image.phys0 += image.pix.bytesperline; 507 image.phys1 += image.pix.bytesperline; 508 } 509 510 ipu_cpmem_set_resolution(priv->idmac_ch, 511 image.rect.width * passthrough_cycles, 512 image.rect.height); 513 ipu_cpmem_set_stride(priv->idmac_ch, image.pix.bytesperline); 514 ipu_cpmem_set_buffer(priv->idmac_ch, 0, image.phys0); 515 ipu_cpmem_set_buffer(priv->idmac_ch, 1, image.phys1); 516 ipu_cpmem_set_format_passthrough(priv->idmac_ch, 517 passthrough_bits); 518 } else { 519 if (priv->interweave_swap) { 520 /* start interweave scan at 1st top line (2nd line) */ 521 image.rect.top = 1; 522 } 523 524 ret = ipu_cpmem_set_image(priv->idmac_ch, &image); 525 if (ret) 526 goto unsetup_vb2; 527 } 528 529 ipu_cpmem_set_burstsize(priv->idmac_ch, burst_size); 530 531 /* 532 * Set the channel for the direct CSI-->memory via SMFC 533 * use-case to very high priority, by enabling the watermark 534 * signal in the SMFC, enabling WM in the channel, and setting 535 * the channel priority to high. 536 * 537 * Refer to the i.mx6 rev. D TRM Table 36-8: Calculated priority 538 * value. 539 * 540 * The WM's are set very low by intention here to ensure that 541 * the SMFC FIFOs do not overflow. 542 */ 543 ipu_smfc_set_watermark(priv->smfc, 0x02, 0x01); 544 ipu_cpmem_set_high_priority(priv->idmac_ch); 545 ipu_idmac_enable_watermark(priv->idmac_ch, true); 546 ipu_cpmem_set_axi_id(priv->idmac_ch, 0); 547 548 burst_size = passthrough ? 549 (burst_size >> 3) - 1 : (burst_size >> 2) - 1; 550 551 ipu_smfc_set_burstsize(priv->smfc, burst_size); 552 553 if (interweave) 554 ipu_cpmem_interlaced_scan(priv->idmac_ch, 555 priv->interweave_swap ? 556 -image.pix.bytesperline : 557 image.pix.bytesperline, 558 image.pix.pixelformat); 559 560 ipu_idmac_set_double_buffer(priv->idmac_ch, true); 561 562 return 0; 563 564 unsetup_vb2: 565 csi_idmac_unsetup_vb2_buf(priv, VB2_BUF_STATE_QUEUED); 566 return ret; 567 } 568 569 static void csi_idmac_unsetup(struct csi_priv *priv, 570 enum vb2_buffer_state state) 571 { 572 ipu_idmac_disable_channel(priv->idmac_ch); 573 ipu_smfc_disable(priv->smfc); 574 575 csi_idmac_unsetup_vb2_buf(priv, state); 576 } 577 578 static int csi_idmac_setup(struct csi_priv *priv) 579 { 580 int ret; 581 582 ret = csi_idmac_setup_channel(priv); 583 if (ret) 584 return ret; 585 586 ipu_cpmem_dump(priv->idmac_ch); 587 ipu_dump(priv->ipu); 588 589 ipu_smfc_enable(priv->smfc); 590 591 /* set buffers ready */ 592 ipu_idmac_select_buffer(priv->idmac_ch, 0); 593 ipu_idmac_select_buffer(priv->idmac_ch, 1); 594 595 /* enable the channels */ 596 ipu_idmac_enable_channel(priv->idmac_ch); 597 598 return 0; 599 } 600 601 static int csi_idmac_start(struct csi_priv *priv) 602 { 603 struct imx_media_video_dev *vdev = priv->vdev; 604 int ret; 605 606 ret = csi_idmac_get_ipu_resources(priv); 607 if (ret) 608 return ret; 609 610 ipu_smfc_map_channel(priv->smfc, priv->csi_id, priv->vc_num); 611 612 ret = imx_media_alloc_dma_buf(priv->dev, &priv->underrun_buf, 613 vdev->fmt.sizeimage); 614 if (ret) 615 goto out_put_ipu; 616 617 priv->ipu_buf_num = 0; 618 619 /* init EOF completion waitq */ 620 init_completion(&priv->last_eof_comp); 621 priv->frame_sequence = 0; 622 priv->last_eof = false; 623 priv->nfb4eof = false; 624 625 ret = csi_idmac_setup(priv); 626 if (ret) { 627 v4l2_err(&priv->sd, "csi_idmac_setup failed: %d\n", ret); 628 goto out_free_dma_buf; 629 } 630 631 priv->nfb4eof_irq = ipu_idmac_channel_irq(priv->ipu, 632 priv->idmac_ch, 633 IPU_IRQ_NFB4EOF); 634 ret = devm_request_irq(priv->dev, priv->nfb4eof_irq, 635 csi_idmac_nfb4eof_interrupt, 0, 636 "imx-smfc-nfb4eof", priv); 637 if (ret) { 638 v4l2_err(&priv->sd, 639 "Error registering NFB4EOF irq: %d\n", ret); 640 goto out_unsetup; 641 } 642 643 priv->eof_irq = ipu_idmac_channel_irq(priv->ipu, priv->idmac_ch, 644 IPU_IRQ_EOF); 645 646 ret = devm_request_irq(priv->dev, priv->eof_irq, 647 csi_idmac_eof_interrupt, 0, 648 "imx-smfc-eof", priv); 649 if (ret) { 650 v4l2_err(&priv->sd, 651 "Error registering eof irq: %d\n", ret); 652 goto out_free_nfb4eof_irq; 653 } 654 655 /* start the EOF timeout timer */ 656 mod_timer(&priv->eof_timeout_timer, 657 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT)); 658 659 return 0; 660 661 out_free_nfb4eof_irq: 662 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv); 663 out_unsetup: 664 csi_idmac_unsetup(priv, VB2_BUF_STATE_QUEUED); 665 out_free_dma_buf: 666 imx_media_free_dma_buf(priv->dev, &priv->underrun_buf); 667 out_put_ipu: 668 csi_idmac_put_ipu_resources(priv); 669 return ret; 670 } 671 672 static void csi_idmac_wait_last_eof(struct csi_priv *priv) 673 { 674 unsigned long flags; 675 int ret; 676 677 /* mark next EOF interrupt as the last before stream off */ 678 spin_lock_irqsave(&priv->irqlock, flags); 679 priv->last_eof = true; 680 spin_unlock_irqrestore(&priv->irqlock, flags); 681 682 /* 683 * and then wait for interrupt handler to mark completion. 684 */ 685 ret = wait_for_completion_timeout( 686 &priv->last_eof_comp, msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT)); 687 if (ret == 0) 688 v4l2_warn(&priv->sd, "wait last EOF timeout\n"); 689 } 690 691 static void csi_idmac_stop(struct csi_priv *priv) 692 { 693 devm_free_irq(priv->dev, priv->eof_irq, priv); 694 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv); 695 696 csi_idmac_unsetup(priv, VB2_BUF_STATE_ERROR); 697 698 imx_media_free_dma_buf(priv->dev, &priv->underrun_buf); 699 700 /* cancel the EOF timeout timer */ 701 del_timer_sync(&priv->eof_timeout_timer); 702 703 csi_idmac_put_ipu_resources(priv); 704 } 705 706 /* Update the CSI whole sensor and active windows */ 707 static int csi_setup(struct csi_priv *priv) 708 { 709 struct v4l2_mbus_framefmt *infmt, *outfmt; 710 const struct imx_media_pixfmt *incc; 711 struct v4l2_mbus_config mbus_cfg; 712 struct v4l2_mbus_framefmt if_fmt; 713 struct v4l2_rect crop; 714 715 infmt = &priv->format_mbus[CSI_SINK_PAD]; 716 incc = priv->cc[CSI_SINK_PAD]; 717 outfmt = &priv->format_mbus[priv->active_output_pad]; 718 719 /* compose mbus_config from the upstream endpoint */ 720 mbus_cfg.type = priv->upstream_ep.bus_type; 721 if (is_parallel_bus(&priv->upstream_ep)) 722 mbus_cfg.bus.parallel = priv->upstream_ep.bus.parallel; 723 else 724 mbus_cfg.bus.mipi_csi2 = priv->upstream_ep.bus.mipi_csi2; 725 726 if_fmt = *infmt; 727 crop = priv->crop; 728 729 /* 730 * if cycles is set, we need to handle this over multiple cycles as 731 * generic/bayer data 732 */ 733 if (is_parallel_bus(&priv->upstream_ep) && incc->cycles) { 734 if_fmt.width *= incc->cycles; 735 crop.width *= incc->cycles; 736 } 737 738 ipu_csi_set_window(priv->csi, &crop); 739 740 ipu_csi_set_downsize(priv->csi, 741 priv->crop.width == 2 * priv->compose.width, 742 priv->crop.height == 2 * priv->compose.height); 743 744 ipu_csi_init_interface(priv->csi, &mbus_cfg, &if_fmt, outfmt); 745 746 ipu_csi_set_dest(priv->csi, priv->dest); 747 748 if (priv->dest == IPU_CSI_DEST_IDMAC) 749 ipu_csi_set_skip_smfc(priv->csi, priv->skip->skip_smfc, 750 priv->skip->max_ratio - 1, 0); 751 752 ipu_csi_dump(priv->csi); 753 754 return 0; 755 } 756 757 static int csi_start(struct csi_priv *priv) 758 { 759 struct v4l2_fract *input_fi, *output_fi; 760 int ret; 761 762 input_fi = &priv->frame_interval[CSI_SINK_PAD]; 763 output_fi = &priv->frame_interval[priv->active_output_pad]; 764 765 /* start upstream */ 766 ret = v4l2_subdev_call(priv->src_sd, video, s_stream, 1); 767 ret = (ret && ret != -ENOIOCTLCMD) ? ret : 0; 768 if (ret) 769 return ret; 770 771 /* Skip first few frames from a BT.656 source */ 772 if (priv->upstream_ep.bus_type == V4L2_MBUS_BT656) { 773 u32 delay_usec, bad_frames = 20; 774 775 delay_usec = DIV_ROUND_UP_ULL((u64)USEC_PER_SEC * 776 input_fi->numerator * bad_frames, 777 input_fi->denominator); 778 779 usleep_range(delay_usec, delay_usec + 1000); 780 } 781 782 if (priv->dest == IPU_CSI_DEST_IDMAC) { 783 ret = csi_idmac_start(priv); 784 if (ret) 785 goto stop_upstream; 786 } 787 788 ret = csi_setup(priv); 789 if (ret) 790 goto idmac_stop; 791 792 /* start the frame interval monitor */ 793 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC) { 794 ret = imx_media_fim_set_stream(priv->fim, output_fi, true); 795 if (ret) 796 goto idmac_stop; 797 } 798 799 ret = ipu_csi_enable(priv->csi); 800 if (ret) { 801 v4l2_err(&priv->sd, "CSI enable error: %d\n", ret); 802 goto fim_off; 803 } 804 805 return 0; 806 807 fim_off: 808 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC) 809 imx_media_fim_set_stream(priv->fim, NULL, false); 810 idmac_stop: 811 if (priv->dest == IPU_CSI_DEST_IDMAC) 812 csi_idmac_stop(priv); 813 stop_upstream: 814 v4l2_subdev_call(priv->src_sd, video, s_stream, 0); 815 return ret; 816 } 817 818 static void csi_stop(struct csi_priv *priv) 819 { 820 if (priv->dest == IPU_CSI_DEST_IDMAC) 821 csi_idmac_wait_last_eof(priv); 822 823 /* 824 * Disable the CSI asap, after syncing with the last EOF. 825 * Doing so after the IDMA channel is disabled has shown to 826 * create hard system-wide hangs. 827 */ 828 ipu_csi_disable(priv->csi); 829 830 /* stop upstream */ 831 v4l2_subdev_call(priv->src_sd, video, s_stream, 0); 832 833 if (priv->dest == IPU_CSI_DEST_IDMAC) { 834 csi_idmac_stop(priv); 835 836 /* stop the frame interval monitor */ 837 if (priv->fim) 838 imx_media_fim_set_stream(priv->fim, NULL, false); 839 } 840 } 841 842 static const struct csi_skip_desc csi_skip[12] = { 843 { 1, 1, 0x00 }, /* Keep all frames */ 844 { 5, 6, 0x10 }, /* Skip every sixth frame */ 845 { 4, 5, 0x08 }, /* Skip every fifth frame */ 846 { 3, 4, 0x04 }, /* Skip every fourth frame */ 847 { 2, 3, 0x02 }, /* Skip every third frame */ 848 { 3, 5, 0x0a }, /* Skip frames 1 and 3 of every 5 */ 849 { 1, 2, 0x01 }, /* Skip every second frame */ 850 { 2, 5, 0x0b }, /* Keep frames 1 and 4 of every 5 */ 851 { 1, 3, 0x03 }, /* Keep one in three frames */ 852 { 1, 4, 0x07 }, /* Keep one in four frames */ 853 { 1, 5, 0x0f }, /* Keep one in five frames */ 854 { 1, 6, 0x1f }, /* Keep one in six frames */ 855 }; 856 857 static void csi_apply_skip_interval(const struct csi_skip_desc *skip, 858 struct v4l2_fract *interval) 859 { 860 unsigned int div; 861 862 interval->numerator *= skip->max_ratio; 863 interval->denominator *= skip->keep; 864 865 /* Reduce fraction to lowest terms */ 866 div = gcd(interval->numerator, interval->denominator); 867 if (div > 1) { 868 interval->numerator /= div; 869 interval->denominator /= div; 870 } 871 } 872 873 /* 874 * Find the skip pattern to produce the output frame interval closest to the 875 * requested one, for the given input frame interval. Updates the output frame 876 * interval to the exact value. 877 */ 878 static const struct csi_skip_desc *csi_find_best_skip(struct v4l2_fract *in, 879 struct v4l2_fract *out) 880 { 881 const struct csi_skip_desc *skip = &csi_skip[0], *best_skip = skip; 882 u32 min_err = UINT_MAX; 883 u64 want_us; 884 int i; 885 886 /* Default to 1:1 ratio */ 887 if (out->numerator == 0 || out->denominator == 0 || 888 in->numerator == 0 || in->denominator == 0) { 889 *out = *in; 890 return best_skip; 891 } 892 893 want_us = div_u64((u64)USEC_PER_SEC * out->numerator, out->denominator); 894 895 /* Find the reduction closest to the requested time per frame */ 896 for (i = 0; i < ARRAY_SIZE(csi_skip); i++, skip++) { 897 u64 tmp, err; 898 899 tmp = div_u64((u64)USEC_PER_SEC * in->numerator * 900 skip->max_ratio, in->denominator * skip->keep); 901 902 err = abs((s64)tmp - want_us); 903 if (err < min_err) { 904 min_err = err; 905 best_skip = skip; 906 } 907 } 908 909 *out = *in; 910 csi_apply_skip_interval(best_skip, out); 911 912 return best_skip; 913 } 914 915 /* 916 * V4L2 subdev operations. 917 */ 918 919 static int csi_g_frame_interval(struct v4l2_subdev *sd, 920 struct v4l2_subdev_frame_interval *fi) 921 { 922 struct csi_priv *priv = v4l2_get_subdevdata(sd); 923 924 if (fi->pad >= CSI_NUM_PADS) 925 return -EINVAL; 926 927 mutex_lock(&priv->lock); 928 929 fi->interval = priv->frame_interval[fi->pad]; 930 931 mutex_unlock(&priv->lock); 932 933 return 0; 934 } 935 936 static int csi_s_frame_interval(struct v4l2_subdev *sd, 937 struct v4l2_subdev_frame_interval *fi) 938 { 939 struct csi_priv *priv = v4l2_get_subdevdata(sd); 940 struct v4l2_fract *input_fi; 941 int ret = 0; 942 943 mutex_lock(&priv->lock); 944 945 input_fi = &priv->frame_interval[CSI_SINK_PAD]; 946 947 switch (fi->pad) { 948 case CSI_SINK_PAD: 949 /* No limits on valid input frame intervals */ 950 if (fi->interval.numerator == 0 || 951 fi->interval.denominator == 0) 952 fi->interval = *input_fi; 953 /* Reset output intervals and frame skipping ratio to 1:1 */ 954 priv->frame_interval[CSI_SRC_PAD_IDMAC] = fi->interval; 955 priv->frame_interval[CSI_SRC_PAD_DIRECT] = fi->interval; 956 priv->skip = &csi_skip[0]; 957 break; 958 case CSI_SRC_PAD_IDMAC: 959 /* 960 * frame interval at IDMAC output pad depends on input 961 * interval, modified by frame skipping. 962 */ 963 priv->skip = csi_find_best_skip(input_fi, &fi->interval); 964 break; 965 case CSI_SRC_PAD_DIRECT: 966 /* 967 * frame interval at DIRECT output pad is same as input 968 * interval. 969 */ 970 fi->interval = *input_fi; 971 break; 972 default: 973 ret = -EINVAL; 974 goto out; 975 } 976 977 priv->frame_interval[fi->pad] = fi->interval; 978 out: 979 mutex_unlock(&priv->lock); 980 return ret; 981 } 982 983 static int csi_s_stream(struct v4l2_subdev *sd, int enable) 984 { 985 struct csi_priv *priv = v4l2_get_subdevdata(sd); 986 int ret = 0; 987 988 mutex_lock(&priv->lock); 989 990 if (!priv->src_sd || !priv->sink) { 991 ret = -EPIPE; 992 goto out; 993 } 994 995 /* 996 * enable/disable streaming only if stream_count is 997 * going from 0 to 1 / 1 to 0. 998 */ 999 if (priv->stream_count != !enable) 1000 goto update_count; 1001 1002 if (enable) { 1003 dev_dbg(priv->dev, "stream ON\n"); 1004 ret = csi_start(priv); 1005 if (ret) 1006 goto out; 1007 } else { 1008 dev_dbg(priv->dev, "stream OFF\n"); 1009 csi_stop(priv); 1010 } 1011 1012 update_count: 1013 priv->stream_count += enable ? 1 : -1; 1014 if (priv->stream_count < 0) 1015 priv->stream_count = 0; 1016 out: 1017 mutex_unlock(&priv->lock); 1018 return ret; 1019 } 1020 1021 static int csi_link_setup(struct media_entity *entity, 1022 const struct media_pad *local, 1023 const struct media_pad *remote, u32 flags) 1024 { 1025 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); 1026 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1027 struct v4l2_subdev *remote_sd; 1028 int ret = 0; 1029 1030 dev_dbg(priv->dev, "link setup %s -> %s\n", remote->entity->name, 1031 local->entity->name); 1032 1033 mutex_lock(&priv->lock); 1034 1035 if (local->flags & MEDIA_PAD_FL_SINK) { 1036 if (!is_media_entity_v4l2_subdev(remote->entity)) { 1037 ret = -EINVAL; 1038 goto out; 1039 } 1040 1041 remote_sd = media_entity_to_v4l2_subdev(remote->entity); 1042 1043 if (flags & MEDIA_LNK_FL_ENABLED) { 1044 if (priv->src_sd) { 1045 ret = -EBUSY; 1046 goto out; 1047 } 1048 priv->src_sd = remote_sd; 1049 } else { 1050 priv->src_sd = NULL; 1051 } 1052 1053 goto out; 1054 } 1055 1056 /* this is a source pad */ 1057 1058 if (flags & MEDIA_LNK_FL_ENABLED) { 1059 if (priv->sink) { 1060 ret = -EBUSY; 1061 goto out; 1062 } 1063 } else { 1064 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 1065 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0); 1066 priv->sink = NULL; 1067 /* do not apply IC burst alignment in csi_try_crop */ 1068 priv->active_output_pad = CSI_SRC_PAD_IDMAC; 1069 goto out; 1070 } 1071 1072 /* record which output pad is now active */ 1073 priv->active_output_pad = local->index; 1074 1075 /* set CSI destination */ 1076 if (local->index == CSI_SRC_PAD_IDMAC) { 1077 if (!is_media_entity_v4l2_video_device(remote->entity)) { 1078 ret = -EINVAL; 1079 goto out; 1080 } 1081 1082 if (priv->fim) { 1083 ret = imx_media_fim_add_controls(priv->fim); 1084 if (ret) 1085 goto out; 1086 } 1087 1088 priv->dest = IPU_CSI_DEST_IDMAC; 1089 } else { 1090 if (!is_media_entity_v4l2_subdev(remote->entity)) { 1091 ret = -EINVAL; 1092 goto out; 1093 } 1094 1095 remote_sd = media_entity_to_v4l2_subdev(remote->entity); 1096 switch (remote_sd->grp_id) { 1097 case IMX_MEDIA_GRP_ID_IPU_VDIC: 1098 priv->dest = IPU_CSI_DEST_VDIC; 1099 break; 1100 case IMX_MEDIA_GRP_ID_IPU_IC_PRP: 1101 priv->dest = IPU_CSI_DEST_IC; 1102 break; 1103 default: 1104 ret = -EINVAL; 1105 goto out; 1106 } 1107 } 1108 1109 priv->sink = remote->entity; 1110 out: 1111 mutex_unlock(&priv->lock); 1112 return ret; 1113 } 1114 1115 static int csi_link_validate(struct v4l2_subdev *sd, 1116 struct media_link *link, 1117 struct v4l2_subdev_format *source_fmt, 1118 struct v4l2_subdev_format *sink_fmt) 1119 { 1120 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1121 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1122 bool is_csi2; 1123 int ret; 1124 1125 ret = v4l2_subdev_link_validate_default(sd, link, 1126 source_fmt, sink_fmt); 1127 if (ret) 1128 return ret; 1129 1130 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1131 if (ret) { 1132 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1133 return ret; 1134 } 1135 1136 mutex_lock(&priv->lock); 1137 1138 priv->upstream_ep = upstream_ep; 1139 is_csi2 = !is_parallel_bus(&upstream_ep); 1140 if (is_csi2) { 1141 /* 1142 * NOTE! It seems the virtual channels from the mipi csi-2 1143 * receiver are used only for routing by the video mux's, 1144 * or for hard-wired routing to the CSI's. Once the stream 1145 * enters the CSI's however, they are treated internally 1146 * in the IPU as virtual channel 0. 1147 */ 1148 ipu_csi_set_mipi_datatype(priv->csi, 0, 1149 &priv->format_mbus[CSI_SINK_PAD]); 1150 } 1151 1152 /* select either parallel or MIPI-CSI2 as input to CSI */ 1153 ipu_set_csi_src_mux(priv->ipu, priv->csi_id, is_csi2); 1154 1155 mutex_unlock(&priv->lock); 1156 return ret; 1157 } 1158 1159 static struct v4l2_mbus_framefmt * 1160 __csi_get_fmt(struct csi_priv *priv, struct v4l2_subdev_state *sd_state, 1161 unsigned int pad, enum v4l2_subdev_format_whence which) 1162 { 1163 if (which == V4L2_SUBDEV_FORMAT_TRY) 1164 return v4l2_subdev_get_try_format(&priv->sd, sd_state, pad); 1165 else 1166 return &priv->format_mbus[pad]; 1167 } 1168 1169 static struct v4l2_rect * 1170 __csi_get_crop(struct csi_priv *priv, struct v4l2_subdev_state *sd_state, 1171 enum v4l2_subdev_format_whence which) 1172 { 1173 if (which == V4L2_SUBDEV_FORMAT_TRY) 1174 return v4l2_subdev_get_try_crop(&priv->sd, sd_state, 1175 CSI_SINK_PAD); 1176 else 1177 return &priv->crop; 1178 } 1179 1180 static struct v4l2_rect * 1181 __csi_get_compose(struct csi_priv *priv, struct v4l2_subdev_state *sd_state, 1182 enum v4l2_subdev_format_whence which) 1183 { 1184 if (which == V4L2_SUBDEV_FORMAT_TRY) 1185 return v4l2_subdev_get_try_compose(&priv->sd, sd_state, 1186 CSI_SINK_PAD); 1187 else 1188 return &priv->compose; 1189 } 1190 1191 static void csi_try_crop(struct csi_priv *priv, 1192 struct v4l2_rect *crop, 1193 struct v4l2_subdev_state *sd_state, 1194 struct v4l2_mbus_framefmt *infmt, 1195 struct v4l2_fwnode_endpoint *upstream_ep) 1196 { 1197 u32 in_height; 1198 1199 crop->width = min_t(__u32, infmt->width, crop->width); 1200 if (crop->left + crop->width > infmt->width) 1201 crop->left = infmt->width - crop->width; 1202 /* adjust crop left/width to h/w alignment restrictions */ 1203 crop->left &= ~0x3; 1204 if (priv->active_output_pad == CSI_SRC_PAD_DIRECT) 1205 crop->width &= ~0x7; /* multiple of 8 pixels (IC burst) */ 1206 else 1207 crop->width &= ~0x1; /* multiple of 2 pixels */ 1208 1209 in_height = infmt->height; 1210 if (infmt->field == V4L2_FIELD_ALTERNATE) 1211 in_height *= 2; 1212 1213 /* 1214 * FIXME: not sure why yet, but on interlaced bt.656, 1215 * changing the vertical cropping causes loss of vertical 1216 * sync, so fix it to NTSC/PAL active lines. NTSC contains 1217 * 2 extra lines of active video that need to be cropped. 1218 */ 1219 if (upstream_ep->bus_type == V4L2_MBUS_BT656 && 1220 (V4L2_FIELD_HAS_BOTH(infmt->field) || 1221 infmt->field == V4L2_FIELD_ALTERNATE)) { 1222 crop->height = in_height; 1223 crop->top = (in_height == 480) ? 2 : 0; 1224 } else { 1225 crop->height = min_t(__u32, in_height, crop->height); 1226 if (crop->top + crop->height > in_height) 1227 crop->top = in_height - crop->height; 1228 } 1229 } 1230 1231 static int csi_enum_mbus_code(struct v4l2_subdev *sd, 1232 struct v4l2_subdev_state *sd_state, 1233 struct v4l2_subdev_mbus_code_enum *code) 1234 { 1235 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1236 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1237 const struct imx_media_pixfmt *incc; 1238 struct v4l2_mbus_framefmt *infmt; 1239 int ret = 0; 1240 1241 mutex_lock(&priv->lock); 1242 1243 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, code->which); 1244 incc = imx_media_find_mbus_format(infmt->code, PIXFMT_SEL_ANY); 1245 1246 switch (code->pad) { 1247 case CSI_SINK_PAD: 1248 ret = imx_media_enum_mbus_formats(&code->code, code->index, 1249 PIXFMT_SEL_ANY); 1250 break; 1251 case CSI_SRC_PAD_DIRECT: 1252 case CSI_SRC_PAD_IDMAC: 1253 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1254 if (ret) { 1255 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1256 goto out; 1257 } 1258 1259 if (requires_passthrough(&upstream_ep, infmt, incc)) { 1260 if (code->index != 0) { 1261 ret = -EINVAL; 1262 goto out; 1263 } 1264 code->code = infmt->code; 1265 } else { 1266 enum imx_pixfmt_sel fmt_sel = 1267 (incc->cs == IPUV3_COLORSPACE_YUV) ? 1268 PIXFMT_SEL_YUV : PIXFMT_SEL_RGB; 1269 1270 ret = imx_media_enum_ipu_formats(&code->code, 1271 code->index, 1272 fmt_sel); 1273 } 1274 break; 1275 default: 1276 ret = -EINVAL; 1277 } 1278 1279 out: 1280 mutex_unlock(&priv->lock); 1281 return ret; 1282 } 1283 1284 static int csi_enum_frame_size(struct v4l2_subdev *sd, 1285 struct v4l2_subdev_state *sd_state, 1286 struct v4l2_subdev_frame_size_enum *fse) 1287 { 1288 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1289 struct v4l2_rect *crop; 1290 int ret = 0; 1291 1292 if (fse->pad >= CSI_NUM_PADS || 1293 fse->index > (fse->pad == CSI_SINK_PAD ? 0 : 3)) 1294 return -EINVAL; 1295 1296 mutex_lock(&priv->lock); 1297 1298 if (fse->pad == CSI_SINK_PAD) { 1299 fse->min_width = MIN_W; 1300 fse->max_width = MAX_W; 1301 fse->min_height = MIN_H; 1302 fse->max_height = MAX_H; 1303 } else { 1304 crop = __csi_get_crop(priv, sd_state, fse->which); 1305 1306 fse->min_width = fse->index & 1 ? 1307 crop->width / 2 : crop->width; 1308 fse->max_width = fse->min_width; 1309 fse->min_height = fse->index & 2 ? 1310 crop->height / 2 : crop->height; 1311 fse->max_height = fse->min_height; 1312 } 1313 1314 mutex_unlock(&priv->lock); 1315 return ret; 1316 } 1317 1318 static int csi_enum_frame_interval(struct v4l2_subdev *sd, 1319 struct v4l2_subdev_state *sd_state, 1320 struct v4l2_subdev_frame_interval_enum *fie) 1321 { 1322 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1323 struct v4l2_fract *input_fi; 1324 struct v4l2_rect *crop; 1325 int ret = 0; 1326 1327 if (fie->pad >= CSI_NUM_PADS || 1328 fie->index >= (fie->pad != CSI_SRC_PAD_IDMAC ? 1329 1 : ARRAY_SIZE(csi_skip))) 1330 return -EINVAL; 1331 1332 mutex_lock(&priv->lock); 1333 1334 input_fi = &priv->frame_interval[CSI_SINK_PAD]; 1335 crop = __csi_get_crop(priv, sd_state, fie->which); 1336 1337 if ((fie->width != crop->width && fie->width != crop->width / 2) || 1338 (fie->height != crop->height && fie->height != crop->height / 2)) { 1339 ret = -EINVAL; 1340 goto out; 1341 } 1342 1343 fie->interval = *input_fi; 1344 1345 if (fie->pad == CSI_SRC_PAD_IDMAC) 1346 csi_apply_skip_interval(&csi_skip[fie->index], 1347 &fie->interval); 1348 1349 out: 1350 mutex_unlock(&priv->lock); 1351 return ret; 1352 } 1353 1354 static int csi_get_fmt(struct v4l2_subdev *sd, 1355 struct v4l2_subdev_state *sd_state, 1356 struct v4l2_subdev_format *sdformat) 1357 { 1358 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1359 struct v4l2_mbus_framefmt *fmt; 1360 int ret = 0; 1361 1362 if (sdformat->pad >= CSI_NUM_PADS) 1363 return -EINVAL; 1364 1365 mutex_lock(&priv->lock); 1366 1367 fmt = __csi_get_fmt(priv, sd_state, sdformat->pad, sdformat->which); 1368 if (!fmt) { 1369 ret = -EINVAL; 1370 goto out; 1371 } 1372 1373 sdformat->format = *fmt; 1374 out: 1375 mutex_unlock(&priv->lock); 1376 return ret; 1377 } 1378 1379 static void csi_try_field(struct csi_priv *priv, 1380 struct v4l2_subdev_state *sd_state, 1381 struct v4l2_subdev_format *sdformat) 1382 { 1383 struct v4l2_mbus_framefmt *infmt = 1384 __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sdformat->which); 1385 1386 /* 1387 * no restrictions on sink pad field type except must 1388 * be initialized. 1389 */ 1390 if (sdformat->pad == CSI_SINK_PAD) { 1391 if (sdformat->format.field == V4L2_FIELD_ANY) 1392 sdformat->format.field = V4L2_FIELD_NONE; 1393 return; 1394 } 1395 1396 switch (infmt->field) { 1397 case V4L2_FIELD_SEQ_TB: 1398 case V4L2_FIELD_SEQ_BT: 1399 /* 1400 * If the user requests sequential at the source pad, 1401 * allow it (along with possibly inverting field order). 1402 * Otherwise passthrough the field type. 1403 */ 1404 if (!V4L2_FIELD_IS_SEQUENTIAL(sdformat->format.field)) 1405 sdformat->format.field = infmt->field; 1406 break; 1407 case V4L2_FIELD_ALTERNATE: 1408 /* 1409 * This driver does not support alternate field mode, and 1410 * the CSI captures a whole frame, so the CSI never presents 1411 * alternate mode at its source pads. If user has not 1412 * already requested sequential, translate ALTERNATE at 1413 * sink pad to SEQ_TB or SEQ_BT at the source pad depending 1414 * on input height (assume NTSC BT order if 480 total active 1415 * frame lines, otherwise PAL TB order). 1416 */ 1417 if (!V4L2_FIELD_IS_SEQUENTIAL(sdformat->format.field)) 1418 sdformat->format.field = (infmt->height == 480 / 2) ? 1419 V4L2_FIELD_SEQ_BT : V4L2_FIELD_SEQ_TB; 1420 break; 1421 default: 1422 /* Passthrough for all other input field types */ 1423 sdformat->format.field = infmt->field; 1424 break; 1425 } 1426 } 1427 1428 static void csi_try_fmt(struct csi_priv *priv, 1429 struct v4l2_fwnode_endpoint *upstream_ep, 1430 struct v4l2_subdev_state *sd_state, 1431 struct v4l2_subdev_format *sdformat, 1432 struct v4l2_rect *crop, 1433 struct v4l2_rect *compose, 1434 const struct imx_media_pixfmt **cc) 1435 { 1436 const struct imx_media_pixfmt *incc; 1437 struct v4l2_mbus_framefmt *infmt; 1438 u32 code; 1439 1440 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sdformat->which); 1441 1442 switch (sdformat->pad) { 1443 case CSI_SRC_PAD_DIRECT: 1444 case CSI_SRC_PAD_IDMAC: 1445 incc = imx_media_find_mbus_format(infmt->code, PIXFMT_SEL_ANY); 1446 1447 sdformat->format.width = compose->width; 1448 sdformat->format.height = compose->height; 1449 1450 if (requires_passthrough(upstream_ep, infmt, incc)) { 1451 sdformat->format.code = infmt->code; 1452 *cc = incc; 1453 } else { 1454 enum imx_pixfmt_sel fmt_sel = 1455 (incc->cs == IPUV3_COLORSPACE_YUV) ? 1456 PIXFMT_SEL_YUV : PIXFMT_SEL_RGB; 1457 1458 *cc = imx_media_find_ipu_format(sdformat->format.code, 1459 fmt_sel); 1460 if (!*cc) { 1461 imx_media_enum_ipu_formats(&code, 0, fmt_sel); 1462 *cc = imx_media_find_ipu_format(code, fmt_sel); 1463 sdformat->format.code = (*cc)->codes[0]; 1464 } 1465 } 1466 1467 csi_try_field(priv, sd_state, sdformat); 1468 1469 /* propagate colorimetry from sink */ 1470 sdformat->format.colorspace = infmt->colorspace; 1471 sdformat->format.xfer_func = infmt->xfer_func; 1472 sdformat->format.quantization = infmt->quantization; 1473 sdformat->format.ycbcr_enc = infmt->ycbcr_enc; 1474 1475 break; 1476 case CSI_SINK_PAD: 1477 v4l_bound_align_image(&sdformat->format.width, MIN_W, MAX_W, 1478 W_ALIGN, &sdformat->format.height, 1479 MIN_H, MAX_H, H_ALIGN, S_ALIGN); 1480 1481 *cc = imx_media_find_mbus_format(sdformat->format.code, 1482 PIXFMT_SEL_ANY); 1483 if (!*cc) { 1484 imx_media_enum_mbus_formats(&code, 0, 1485 PIXFMT_SEL_YUV_RGB); 1486 *cc = imx_media_find_mbus_format(code, 1487 PIXFMT_SEL_YUV_RGB); 1488 sdformat->format.code = (*cc)->codes[0]; 1489 } 1490 1491 csi_try_field(priv, sd_state, sdformat); 1492 1493 /* Reset crop and compose rectangles */ 1494 crop->left = 0; 1495 crop->top = 0; 1496 crop->width = sdformat->format.width; 1497 crop->height = sdformat->format.height; 1498 if (sdformat->format.field == V4L2_FIELD_ALTERNATE) 1499 crop->height *= 2; 1500 csi_try_crop(priv, crop, sd_state, &sdformat->format, 1501 upstream_ep); 1502 compose->left = 0; 1503 compose->top = 0; 1504 compose->width = crop->width; 1505 compose->height = crop->height; 1506 1507 break; 1508 } 1509 1510 imx_media_try_colorimetry(&sdformat->format, 1511 priv->active_output_pad == CSI_SRC_PAD_DIRECT); 1512 } 1513 1514 static int csi_set_fmt(struct v4l2_subdev *sd, 1515 struct v4l2_subdev_state *sd_state, 1516 struct v4l2_subdev_format *sdformat) 1517 { 1518 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1519 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1520 const struct imx_media_pixfmt *cc; 1521 struct v4l2_mbus_framefmt *fmt; 1522 struct v4l2_rect *crop, *compose; 1523 int ret; 1524 1525 if (sdformat->pad >= CSI_NUM_PADS) 1526 return -EINVAL; 1527 1528 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1529 if (ret) { 1530 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1531 return ret; 1532 } 1533 1534 mutex_lock(&priv->lock); 1535 1536 if (priv->stream_count > 0) { 1537 ret = -EBUSY; 1538 goto out; 1539 } 1540 1541 crop = __csi_get_crop(priv, sd_state, sdformat->which); 1542 compose = __csi_get_compose(priv, sd_state, sdformat->which); 1543 1544 csi_try_fmt(priv, &upstream_ep, sd_state, sdformat, crop, compose, 1545 &cc); 1546 1547 fmt = __csi_get_fmt(priv, sd_state, sdformat->pad, sdformat->which); 1548 *fmt = sdformat->format; 1549 1550 if (sdformat->pad == CSI_SINK_PAD) { 1551 int pad; 1552 1553 /* propagate format to source pads */ 1554 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) { 1555 const struct imx_media_pixfmt *outcc; 1556 struct v4l2_mbus_framefmt *outfmt; 1557 struct v4l2_subdev_format format; 1558 1559 format.pad = pad; 1560 format.which = sdformat->which; 1561 format.format = sdformat->format; 1562 csi_try_fmt(priv, &upstream_ep, sd_state, &format, 1563 NULL, compose, &outcc); 1564 1565 outfmt = __csi_get_fmt(priv, sd_state, pad, 1566 sdformat->which); 1567 *outfmt = format.format; 1568 1569 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE) 1570 priv->cc[pad] = outcc; 1571 } 1572 } 1573 1574 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE) 1575 priv->cc[sdformat->pad] = cc; 1576 1577 out: 1578 mutex_unlock(&priv->lock); 1579 return ret; 1580 } 1581 1582 static int csi_get_selection(struct v4l2_subdev *sd, 1583 struct v4l2_subdev_state *sd_state, 1584 struct v4l2_subdev_selection *sel) 1585 { 1586 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1587 struct v4l2_mbus_framefmt *infmt; 1588 struct v4l2_rect *crop, *compose; 1589 int ret = 0; 1590 1591 if (sel->pad != CSI_SINK_PAD) 1592 return -EINVAL; 1593 1594 mutex_lock(&priv->lock); 1595 1596 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sel->which); 1597 crop = __csi_get_crop(priv, sd_state, sel->which); 1598 compose = __csi_get_compose(priv, sd_state, sel->which); 1599 1600 switch (sel->target) { 1601 case V4L2_SEL_TGT_CROP_BOUNDS: 1602 sel->r.left = 0; 1603 sel->r.top = 0; 1604 sel->r.width = infmt->width; 1605 sel->r.height = infmt->height; 1606 if (infmt->field == V4L2_FIELD_ALTERNATE) 1607 sel->r.height *= 2; 1608 break; 1609 case V4L2_SEL_TGT_CROP: 1610 sel->r = *crop; 1611 break; 1612 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 1613 sel->r.left = 0; 1614 sel->r.top = 0; 1615 sel->r.width = crop->width; 1616 sel->r.height = crop->height; 1617 break; 1618 case V4L2_SEL_TGT_COMPOSE: 1619 sel->r = *compose; 1620 break; 1621 default: 1622 ret = -EINVAL; 1623 } 1624 1625 mutex_unlock(&priv->lock); 1626 return ret; 1627 } 1628 1629 static int csi_set_scale(u32 *compose, u32 crop, u32 flags) 1630 { 1631 if ((flags & (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE)) == 1632 (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE) && 1633 *compose != crop && *compose != crop / 2) 1634 return -ERANGE; 1635 1636 if (*compose <= crop / 2 || 1637 (*compose < crop * 3 / 4 && !(flags & V4L2_SEL_FLAG_GE)) || 1638 (*compose < crop && (flags & V4L2_SEL_FLAG_LE))) 1639 *compose = crop / 2; 1640 else 1641 *compose = crop; 1642 1643 return 0; 1644 } 1645 1646 static int csi_set_selection(struct v4l2_subdev *sd, 1647 struct v4l2_subdev_state *sd_state, 1648 struct v4l2_subdev_selection *sel) 1649 { 1650 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1651 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1652 struct v4l2_mbus_framefmt *infmt; 1653 struct v4l2_rect *crop, *compose; 1654 int pad, ret; 1655 1656 if (sel->pad != CSI_SINK_PAD) 1657 return -EINVAL; 1658 1659 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1660 if (ret) { 1661 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1662 return ret; 1663 } 1664 1665 mutex_lock(&priv->lock); 1666 1667 if (priv->stream_count > 0) { 1668 ret = -EBUSY; 1669 goto out; 1670 } 1671 1672 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sel->which); 1673 crop = __csi_get_crop(priv, sd_state, sel->which); 1674 compose = __csi_get_compose(priv, sd_state, sel->which); 1675 1676 switch (sel->target) { 1677 case V4L2_SEL_TGT_CROP: 1678 /* 1679 * Modifying the crop rectangle always changes the format on 1680 * the source pads. If the KEEP_CONFIG flag is set, just return 1681 * the current crop rectangle. 1682 */ 1683 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) { 1684 sel->r = priv->crop; 1685 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1686 *crop = sel->r; 1687 goto out; 1688 } 1689 1690 csi_try_crop(priv, &sel->r, sd_state, infmt, &upstream_ep); 1691 1692 *crop = sel->r; 1693 1694 /* Reset scaling to 1:1 */ 1695 compose->width = crop->width; 1696 compose->height = crop->height; 1697 break; 1698 case V4L2_SEL_TGT_COMPOSE: 1699 /* 1700 * Modifying the compose rectangle always changes the format on 1701 * the source pads. If the KEEP_CONFIG flag is set, just return 1702 * the current compose rectangle. 1703 */ 1704 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) { 1705 sel->r = priv->compose; 1706 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1707 *compose = sel->r; 1708 goto out; 1709 } 1710 1711 sel->r.left = 0; 1712 sel->r.top = 0; 1713 ret = csi_set_scale(&sel->r.width, crop->width, sel->flags); 1714 if (ret) 1715 goto out; 1716 ret = csi_set_scale(&sel->r.height, crop->height, sel->flags); 1717 if (ret) 1718 goto out; 1719 1720 *compose = sel->r; 1721 break; 1722 default: 1723 ret = -EINVAL; 1724 goto out; 1725 } 1726 1727 /* Reset source pads to sink compose rectangle */ 1728 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) { 1729 struct v4l2_mbus_framefmt *outfmt; 1730 1731 outfmt = __csi_get_fmt(priv, sd_state, pad, sel->which); 1732 outfmt->width = compose->width; 1733 outfmt->height = compose->height; 1734 } 1735 1736 out: 1737 mutex_unlock(&priv->lock); 1738 return ret; 1739 } 1740 1741 static int csi_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, 1742 struct v4l2_event_subscription *sub) 1743 { 1744 if (sub->type != V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR) 1745 return -EINVAL; 1746 if (sub->id != 0) 1747 return -EINVAL; 1748 1749 return v4l2_event_subscribe(fh, sub, 0, NULL); 1750 } 1751 1752 static int csi_unsubscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, 1753 struct v4l2_event_subscription *sub) 1754 { 1755 return v4l2_event_unsubscribe(fh, sub); 1756 } 1757 1758 static int csi_registered(struct v4l2_subdev *sd) 1759 { 1760 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1761 struct ipu_csi *csi; 1762 int i, ret; 1763 u32 code; 1764 1765 /* get handle to IPU CSI */ 1766 csi = ipu_csi_get(priv->ipu, priv->csi_id); 1767 if (IS_ERR(csi)) { 1768 v4l2_err(&priv->sd, "failed to get CSI%d\n", priv->csi_id); 1769 return PTR_ERR(csi); 1770 } 1771 priv->csi = csi; 1772 1773 for (i = 0; i < CSI_NUM_PADS; i++) { 1774 code = 0; 1775 if (i != CSI_SINK_PAD) 1776 imx_media_enum_ipu_formats(&code, 0, PIXFMT_SEL_YUV); 1777 1778 /* set a default mbus format */ 1779 ret = imx_media_init_mbus_fmt(&priv->format_mbus[i], 1780 IMX_MEDIA_DEF_PIX_WIDTH, 1781 IMX_MEDIA_DEF_PIX_HEIGHT, code, 1782 V4L2_FIELD_NONE, &priv->cc[i]); 1783 if (ret) 1784 goto put_csi; 1785 1786 /* init default frame interval */ 1787 priv->frame_interval[i].numerator = 1; 1788 priv->frame_interval[i].denominator = 30; 1789 } 1790 1791 /* disable frame skipping */ 1792 priv->skip = &csi_skip[0]; 1793 1794 /* init default crop and compose rectangle sizes */ 1795 priv->crop.width = IMX_MEDIA_DEF_PIX_WIDTH; 1796 priv->crop.height = IMX_MEDIA_DEF_PIX_HEIGHT; 1797 priv->compose.width = IMX_MEDIA_DEF_PIX_WIDTH; 1798 priv->compose.height = IMX_MEDIA_DEF_PIX_HEIGHT; 1799 1800 priv->fim = imx_media_fim_init(&priv->sd); 1801 if (IS_ERR(priv->fim)) { 1802 ret = PTR_ERR(priv->fim); 1803 goto put_csi; 1804 } 1805 1806 priv->vdev = imx_media_capture_device_init(priv->sd.dev, &priv->sd, 1807 CSI_SRC_PAD_IDMAC, true); 1808 if (IS_ERR(priv->vdev)) { 1809 ret = PTR_ERR(priv->vdev); 1810 goto free_fim; 1811 } 1812 1813 ret = imx_media_capture_device_register(priv->vdev, 0); 1814 if (ret) 1815 goto remove_vdev; 1816 1817 return 0; 1818 1819 remove_vdev: 1820 imx_media_capture_device_remove(priv->vdev); 1821 free_fim: 1822 if (priv->fim) 1823 imx_media_fim_free(priv->fim); 1824 put_csi: 1825 ipu_csi_put(priv->csi); 1826 return ret; 1827 } 1828 1829 static void csi_unregistered(struct v4l2_subdev *sd) 1830 { 1831 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1832 1833 imx_media_capture_device_unregister(priv->vdev); 1834 imx_media_capture_device_remove(priv->vdev); 1835 1836 if (priv->fim) 1837 imx_media_fim_free(priv->fim); 1838 1839 if (priv->csi) 1840 ipu_csi_put(priv->csi); 1841 } 1842 1843 /* 1844 * The CSI has only one fwnode endpoint, at the sink pad. Verify the 1845 * endpoint belongs to us, and return CSI_SINK_PAD. 1846 */ 1847 static int csi_get_fwnode_pad(struct media_entity *entity, 1848 struct fwnode_endpoint *endpoint) 1849 { 1850 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); 1851 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1852 struct fwnode_handle *csi_port = dev_fwnode(priv->dev); 1853 struct fwnode_handle *csi_ep; 1854 int ret; 1855 1856 csi_ep = fwnode_get_next_child_node(csi_port, NULL); 1857 1858 ret = endpoint->local_fwnode == csi_ep ? CSI_SINK_PAD : -ENXIO; 1859 1860 fwnode_handle_put(csi_ep); 1861 1862 return ret; 1863 } 1864 1865 static const struct media_entity_operations csi_entity_ops = { 1866 .link_setup = csi_link_setup, 1867 .link_validate = v4l2_subdev_link_validate, 1868 .get_fwnode_pad = csi_get_fwnode_pad, 1869 }; 1870 1871 static const struct v4l2_subdev_core_ops csi_core_ops = { 1872 .subscribe_event = csi_subscribe_event, 1873 .unsubscribe_event = csi_unsubscribe_event, 1874 }; 1875 1876 static const struct v4l2_subdev_video_ops csi_video_ops = { 1877 .g_frame_interval = csi_g_frame_interval, 1878 .s_frame_interval = csi_s_frame_interval, 1879 .s_stream = csi_s_stream, 1880 }; 1881 1882 static const struct v4l2_subdev_pad_ops csi_pad_ops = { 1883 .init_cfg = imx_media_init_cfg, 1884 .enum_mbus_code = csi_enum_mbus_code, 1885 .enum_frame_size = csi_enum_frame_size, 1886 .enum_frame_interval = csi_enum_frame_interval, 1887 .get_fmt = csi_get_fmt, 1888 .set_fmt = csi_set_fmt, 1889 .get_selection = csi_get_selection, 1890 .set_selection = csi_set_selection, 1891 .link_validate = csi_link_validate, 1892 }; 1893 1894 static const struct v4l2_subdev_ops csi_subdev_ops = { 1895 .core = &csi_core_ops, 1896 .video = &csi_video_ops, 1897 .pad = &csi_pad_ops, 1898 }; 1899 1900 static const struct v4l2_subdev_internal_ops csi_internal_ops = { 1901 .registered = csi_registered, 1902 .unregistered = csi_unregistered, 1903 }; 1904 1905 static int imx_csi_notify_bound(struct v4l2_async_notifier *notifier, 1906 struct v4l2_subdev *sd, 1907 struct v4l2_async_subdev *asd) 1908 { 1909 struct csi_priv *priv = notifier_to_dev(notifier); 1910 struct media_pad *sink = &priv->sd.entity.pads[CSI_SINK_PAD]; 1911 1912 /* 1913 * If the subdev is a video mux, it must be one of the CSI 1914 * muxes. Mark it as such via its group id. 1915 */ 1916 if (sd->entity.function == MEDIA_ENT_F_VID_MUX) 1917 sd->grp_id = IMX_MEDIA_GRP_ID_CSI_MUX; 1918 1919 return v4l2_create_fwnode_links_to_pad(sd, sink, 0); 1920 } 1921 1922 static const struct v4l2_async_notifier_operations csi_notify_ops = { 1923 .bound = imx_csi_notify_bound, 1924 }; 1925 1926 static int imx_csi_async_register(struct csi_priv *priv) 1927 { 1928 struct v4l2_async_subdev *asd = NULL; 1929 struct fwnode_handle *ep; 1930 unsigned int port; 1931 int ret; 1932 1933 v4l2_async_nf_init(&priv->notifier); 1934 1935 /* get this CSI's port id */ 1936 ret = fwnode_property_read_u32(dev_fwnode(priv->dev), "reg", &port); 1937 if (ret < 0) 1938 return ret; 1939 1940 ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(priv->dev->parent), 1941 port, 0, 1942 FWNODE_GRAPH_ENDPOINT_NEXT); 1943 if (ep) { 1944 asd = v4l2_async_nf_add_fwnode_remote(&priv->notifier, ep, 1945 struct v4l2_async_subdev); 1946 1947 fwnode_handle_put(ep); 1948 1949 if (IS_ERR(asd)) { 1950 ret = PTR_ERR(asd); 1951 /* OK if asd already exists */ 1952 if (ret != -EEXIST) 1953 return ret; 1954 } 1955 } 1956 1957 priv->notifier.ops = &csi_notify_ops; 1958 1959 ret = v4l2_async_subdev_nf_register(&priv->sd, &priv->notifier); 1960 if (ret) 1961 return ret; 1962 1963 return v4l2_async_register_subdev(&priv->sd); 1964 } 1965 1966 static int imx_csi_probe(struct platform_device *pdev) 1967 { 1968 struct ipu_client_platformdata *pdata; 1969 struct pinctrl *pinctrl; 1970 struct csi_priv *priv; 1971 int i, ret; 1972 1973 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 1974 if (!priv) 1975 return -ENOMEM; 1976 1977 platform_set_drvdata(pdev, &priv->sd); 1978 priv->dev = &pdev->dev; 1979 1980 ret = dma_set_coherent_mask(priv->dev, DMA_BIT_MASK(32)); 1981 if (ret) 1982 return ret; 1983 1984 /* get parent IPU */ 1985 priv->ipu = dev_get_drvdata(priv->dev->parent); 1986 1987 /* get our CSI id */ 1988 pdata = priv->dev->platform_data; 1989 priv->csi_id = pdata->csi; 1990 priv->smfc_id = (priv->csi_id == 0) ? 0 : 2; 1991 1992 priv->active_output_pad = CSI_SRC_PAD_IDMAC; 1993 1994 timer_setup(&priv->eof_timeout_timer, csi_idmac_eof_timeout, 0); 1995 spin_lock_init(&priv->irqlock); 1996 1997 v4l2_subdev_init(&priv->sd, &csi_subdev_ops); 1998 v4l2_set_subdevdata(&priv->sd, priv); 1999 priv->sd.internal_ops = &csi_internal_ops; 2000 priv->sd.entity.ops = &csi_entity_ops; 2001 priv->sd.entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER; 2002 priv->sd.dev = &pdev->dev; 2003 priv->sd.fwnode = of_fwnode_handle(pdata->of_node); 2004 priv->sd.owner = THIS_MODULE; 2005 priv->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; 2006 priv->sd.grp_id = priv->csi_id ? 2007 IMX_MEDIA_GRP_ID_IPU_CSI1 : IMX_MEDIA_GRP_ID_IPU_CSI0; 2008 imx_media_grp_id_to_sd_name(priv->sd.name, sizeof(priv->sd.name), 2009 priv->sd.grp_id, ipu_get_num(priv->ipu)); 2010 2011 for (i = 0; i < CSI_NUM_PADS; i++) 2012 priv->pad[i].flags = (i == CSI_SINK_PAD) ? 2013 MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE; 2014 2015 ret = media_entity_pads_init(&priv->sd.entity, CSI_NUM_PADS, 2016 priv->pad); 2017 if (ret) 2018 return ret; 2019 2020 mutex_init(&priv->lock); 2021 2022 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0); 2023 priv->sd.ctrl_handler = &priv->ctrl_hdlr; 2024 2025 /* 2026 * The IPUv3 driver did not assign an of_node to this 2027 * device. As a result, pinctrl does not automatically 2028 * configure our pin groups, so we need to do that manually 2029 * here, after setting this device's of_node. 2030 */ 2031 priv->dev->of_node = pdata->of_node; 2032 pinctrl = devm_pinctrl_get_select_default(priv->dev); 2033 if (IS_ERR(pinctrl)) { 2034 ret = PTR_ERR(pinctrl); 2035 dev_dbg(priv->dev, 2036 "devm_pinctrl_get_select_default() failed: %d\n", ret); 2037 if (ret != -ENODEV) 2038 goto free; 2039 } 2040 2041 ret = imx_csi_async_register(priv); 2042 if (ret) 2043 goto cleanup; 2044 2045 return 0; 2046 2047 cleanup: 2048 v4l2_async_nf_unregister(&priv->notifier); 2049 v4l2_async_nf_cleanup(&priv->notifier); 2050 free: 2051 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 2052 mutex_destroy(&priv->lock); 2053 return ret; 2054 } 2055 2056 static int imx_csi_remove(struct platform_device *pdev) 2057 { 2058 struct v4l2_subdev *sd = platform_get_drvdata(pdev); 2059 struct csi_priv *priv = sd_to_dev(sd); 2060 2061 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 2062 mutex_destroy(&priv->lock); 2063 v4l2_async_nf_unregister(&priv->notifier); 2064 v4l2_async_nf_cleanup(&priv->notifier); 2065 v4l2_async_unregister_subdev(sd); 2066 media_entity_cleanup(&sd->entity); 2067 2068 return 0; 2069 } 2070 2071 static const struct platform_device_id imx_csi_ids[] = { 2072 { .name = "imx-ipuv3-csi" }, 2073 { }, 2074 }; 2075 MODULE_DEVICE_TABLE(platform, imx_csi_ids); 2076 2077 static struct platform_driver imx_csi_driver = { 2078 .probe = imx_csi_probe, 2079 .remove = imx_csi_remove, 2080 .id_table = imx_csi_ids, 2081 .driver = { 2082 .name = "imx-ipuv3-csi", 2083 }, 2084 }; 2085 module_platform_driver(imx_csi_driver); 2086 2087 MODULE_DESCRIPTION("i.MX CSI subdev driver"); 2088 MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>"); 2089 MODULE_LICENSE("GPL"); 2090