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 */ 50struct csi_skip_desc { 51 u8 keep; 52 u8 max_ratio; 53 u8 skip_smfc; 54}; 55 56struct 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 /* media bus config of the upstream subdevice CSI is receiving from */ 101 struct v4l2_mbus_config mbus_cfg; 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 118static inline struct csi_priv *sd_to_dev(struct v4l2_subdev *sdev) 119{ 120 return container_of(sdev, struct csi_priv, sd); 121} 122 123static inline struct csi_priv *notifier_to_dev(struct v4l2_async_notifier *n) 124{ 125 return container_of(n, struct csi_priv, notifier); 126} 127 128static inline bool is_parallel_bus(struct v4l2_mbus_config *mbus_cfg) 129{ 130 return mbus_cfg->type != V4L2_MBUS_CSI2_DPHY; 131} 132 133static inline bool is_parallel_16bit_bus(struct v4l2_mbus_config *mbus_cfg) 134{ 135 return is_parallel_bus(mbus_cfg) && mbus_cfg->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 */ 148static inline bool requires_passthrough(struct v4l2_mbus_config *mbus_cfg, 149 struct v4l2_mbus_framefmt *infmt, 150 const struct imx_media_pixfmt *incc) 151{ 152 if (mbus_cfg->type == V4L2_MBUS_BT656) // including BT.1120 153 return false; 154 155 return incc->bayer || is_parallel_16bit_bus(mbus_cfg) || 156 (is_parallel_bus(mbus_cfg) && 157 infmt->code != MEDIA_BUS_FMT_UYVY8_2X8 && 158 infmt->code != MEDIA_BUS_FMT_YUYV8_2X8); 159} 160 161/* 162 * Queries the media bus config of the upstream entity that provides data to 163 * the CSI. This will either be the entity directly upstream from the CSI-2 164 * receiver, directly upstream from a video mux, or directly upstream from 165 * the CSI itself. 166 */ 167static int csi_get_upstream_mbus_config(struct csi_priv *priv, 168 struct v4l2_mbus_config *mbus_cfg) 169{ 170 struct v4l2_subdev *sd, *remote_sd; 171 struct media_pad *remote_pad; 172 int ret; 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 remote_pad = media_entity_remote_pad_unique(&sd->entity, 205 MEDIA_PAD_FL_SOURCE); 206 if (IS_ERR(remote_pad)) 207 return PTR_ERR(remote_pad); 208 209 remote_sd = media_entity_to_v4l2_subdev(remote_pad->entity); 210 211 ret = v4l2_subdev_call(remote_sd, pad, get_mbus_config, 212 remote_pad->index, mbus_cfg); 213 if (ret == -ENOIOCTLCMD) 214 v4l2_err(&priv->sd, 215 "entity %s does not implement get_mbus_config()\n", 216 remote_pad->entity->name); 217 218 return ret; 219} 220 221static void csi_idmac_put_ipu_resources(struct csi_priv *priv) 222{ 223 if (priv->idmac_ch) 224 ipu_idmac_put(priv->idmac_ch); 225 priv->idmac_ch = NULL; 226 227 if (priv->smfc) 228 ipu_smfc_put(priv->smfc); 229 priv->smfc = NULL; 230} 231 232static int csi_idmac_get_ipu_resources(struct csi_priv *priv) 233{ 234 int ch_num, ret; 235 struct ipu_smfc *smfc; 236 struct ipuv3_channel *idmac_ch; 237 238 ch_num = IPUV3_CHANNEL_CSI0 + priv->smfc_id; 239 240 smfc = ipu_smfc_get(priv->ipu, ch_num); 241 if (IS_ERR(smfc)) { 242 v4l2_err(&priv->sd, "failed to get SMFC\n"); 243 ret = PTR_ERR(smfc); 244 goto out; 245 } 246 priv->smfc = smfc; 247 248 idmac_ch = ipu_idmac_get(priv->ipu, ch_num); 249 if (IS_ERR(idmac_ch)) { 250 v4l2_err(&priv->sd, "could not get IDMAC channel %u\n", 251 ch_num); 252 ret = PTR_ERR(idmac_ch); 253 goto out; 254 } 255 priv->idmac_ch = idmac_ch; 256 257 return 0; 258out: 259 csi_idmac_put_ipu_resources(priv); 260 return ret; 261} 262 263static void csi_vb2_buf_done(struct csi_priv *priv) 264{ 265 struct imx_media_video_dev *vdev = priv->vdev; 266 struct imx_media_buffer *done, *next; 267 struct vb2_buffer *vb; 268 dma_addr_t phys; 269 270 done = priv->active_vb2_buf[priv->ipu_buf_num]; 271 if (done) { 272 done->vbuf.field = vdev->fmt.field; 273 done->vbuf.sequence = priv->frame_sequence; 274 vb = &done->vbuf.vb2_buf; 275 vb->timestamp = ktime_get_ns(); 276 vb2_buffer_done(vb, priv->nfb4eof ? 277 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); 278 } 279 280 priv->frame_sequence++; 281 priv->nfb4eof = false; 282 283 /* get next queued buffer */ 284 next = imx_media_capture_device_next_buf(vdev); 285 if (next) { 286 phys = vb2_dma_contig_plane_dma_addr(&next->vbuf.vb2_buf, 0); 287 priv->active_vb2_buf[priv->ipu_buf_num] = next; 288 } else { 289 phys = priv->underrun_buf.phys; 290 priv->active_vb2_buf[priv->ipu_buf_num] = NULL; 291 } 292 293 if (ipu_idmac_buffer_is_ready(priv->idmac_ch, priv->ipu_buf_num)) 294 ipu_idmac_clear_buffer(priv->idmac_ch, priv->ipu_buf_num); 295 296 if (priv->interweave_swap) 297 phys += vdev->fmt.bytesperline; 298 299 ipu_cpmem_set_buffer(priv->idmac_ch, priv->ipu_buf_num, phys); 300} 301 302static irqreturn_t csi_idmac_eof_interrupt(int irq, void *dev_id) 303{ 304 struct csi_priv *priv = dev_id; 305 306 spin_lock(&priv->irqlock); 307 308 if (priv->last_eof) { 309 complete(&priv->last_eof_comp); 310 priv->last_eof = false; 311 goto unlock; 312 } 313 314 if (priv->fim) 315 /* call frame interval monitor */ 316 imx_media_fim_eof_monitor(priv->fim, ktime_get()); 317 318 csi_vb2_buf_done(priv); 319 320 /* select new IPU buf */ 321 ipu_idmac_select_buffer(priv->idmac_ch, priv->ipu_buf_num); 322 /* toggle IPU double-buffer index */ 323 priv->ipu_buf_num ^= 1; 324 325 /* bump the EOF timeout timer */ 326 mod_timer(&priv->eof_timeout_timer, 327 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT)); 328 329unlock: 330 spin_unlock(&priv->irqlock); 331 return IRQ_HANDLED; 332} 333 334static irqreturn_t csi_idmac_nfb4eof_interrupt(int irq, void *dev_id) 335{ 336 struct csi_priv *priv = dev_id; 337 338 spin_lock(&priv->irqlock); 339 340 /* 341 * this is not an unrecoverable error, just mark 342 * the next captured frame with vb2 error flag. 343 */ 344 priv->nfb4eof = true; 345 346 v4l2_err(&priv->sd, "NFB4EOF\n"); 347 348 spin_unlock(&priv->irqlock); 349 350 return IRQ_HANDLED; 351} 352 353/* 354 * EOF timeout timer function. This is an unrecoverable condition 355 * without a stream restart. 356 */ 357static void csi_idmac_eof_timeout(struct timer_list *t) 358{ 359 struct csi_priv *priv = from_timer(priv, t, eof_timeout_timer); 360 struct imx_media_video_dev *vdev = priv->vdev; 361 362 v4l2_err(&priv->sd, "EOF timeout\n"); 363 364 /* signal a fatal error to capture device */ 365 imx_media_capture_device_error(vdev); 366} 367 368static void csi_idmac_setup_vb2_buf(struct csi_priv *priv, dma_addr_t *phys) 369{ 370 struct imx_media_video_dev *vdev = priv->vdev; 371 struct imx_media_buffer *buf; 372 int i; 373 374 for (i = 0; i < 2; i++) { 375 buf = imx_media_capture_device_next_buf(vdev); 376 if (buf) { 377 priv->active_vb2_buf[i] = buf; 378 phys[i] = vb2_dma_contig_plane_dma_addr( 379 &buf->vbuf.vb2_buf, 0); 380 } else { 381 priv->active_vb2_buf[i] = NULL; 382 phys[i] = priv->underrun_buf.phys; 383 } 384 } 385} 386 387static void csi_idmac_unsetup_vb2_buf(struct csi_priv *priv, 388 enum vb2_buffer_state return_status) 389{ 390 struct imx_media_buffer *buf; 391 int i; 392 393 /* return any remaining active frames with return_status */ 394 for (i = 0; i < 2; i++) { 395 buf = priv->active_vb2_buf[i]; 396 if (buf) { 397 struct vb2_buffer *vb = &buf->vbuf.vb2_buf; 398 399 vb->timestamp = ktime_get_ns(); 400 vb2_buffer_done(vb, return_status); 401 } 402 } 403} 404 405/* init the SMFC IDMAC channel */ 406static int csi_idmac_setup_channel(struct csi_priv *priv) 407{ 408 struct imx_media_video_dev *vdev = priv->vdev; 409 const struct imx_media_pixfmt *incc; 410 struct v4l2_mbus_framefmt *infmt; 411 struct v4l2_mbus_framefmt *outfmt; 412 bool passthrough, interweave; 413 struct ipu_image image; 414 u32 passthrough_bits; 415 u32 passthrough_cycles; 416 dma_addr_t phys[2]; 417 u32 burst_size; 418 int ret; 419 420 infmt = &priv->format_mbus[CSI_SINK_PAD]; 421 incc = priv->cc[CSI_SINK_PAD]; 422 outfmt = &priv->format_mbus[CSI_SRC_PAD_IDMAC]; 423 424 ipu_cpmem_zero(priv->idmac_ch); 425 426 memset(&image, 0, sizeof(image)); 427 image.pix = vdev->fmt; 428 image.rect = vdev->compose; 429 430 csi_idmac_setup_vb2_buf(priv, phys); 431 432 image.phys0 = phys[0]; 433 image.phys1 = phys[1]; 434 435 passthrough = requires_passthrough(&priv->mbus_cfg, infmt, incc); 436 passthrough_cycles = 1; 437 438 /* 439 * If the field type at capture interface is interlaced, and 440 * the output IDMAC pad is sequential, enable interweave at 441 * the IDMAC output channel. 442 */ 443 interweave = V4L2_FIELD_IS_INTERLACED(image.pix.field) && 444 V4L2_FIELD_IS_SEQUENTIAL(outfmt->field); 445 priv->interweave_swap = interweave && 446 image.pix.field == V4L2_FIELD_INTERLACED_BT; 447 448 switch (image.pix.pixelformat) { 449 case V4L2_PIX_FMT_SBGGR8: 450 case V4L2_PIX_FMT_SGBRG8: 451 case V4L2_PIX_FMT_SGRBG8: 452 case V4L2_PIX_FMT_SRGGB8: 453 case V4L2_PIX_FMT_GREY: 454 burst_size = 16; 455 passthrough_bits = 8; 456 break; 457 case V4L2_PIX_FMT_SBGGR16: 458 case V4L2_PIX_FMT_SGBRG16: 459 case V4L2_PIX_FMT_SGRBG16: 460 case V4L2_PIX_FMT_SRGGB16: 461 case V4L2_PIX_FMT_Y10: 462 case V4L2_PIX_FMT_Y12: 463 burst_size = 8; 464 passthrough_bits = 16; 465 break; 466 case V4L2_PIX_FMT_YUV420: 467 case V4L2_PIX_FMT_YVU420: 468 case V4L2_PIX_FMT_NV12: 469 burst_size = (image.pix.width & 0x3f) ? 470 ((image.pix.width & 0x1f) ? 471 ((image.pix.width & 0xf) ? 8 : 16) : 32) : 64; 472 passthrough_bits = 16; 473 /* 474 * Skip writing U and V components to odd rows (but not 475 * when enabling IDMAC interweaving, they are incompatible). 476 */ 477 if (!interweave) 478 ipu_cpmem_skip_odd_chroma_rows(priv->idmac_ch); 479 break; 480 case V4L2_PIX_FMT_YUYV: 481 case V4L2_PIX_FMT_UYVY: 482 burst_size = (image.pix.width & 0x1f) ? 483 ((image.pix.width & 0xf) ? 8 : 16) : 32; 484 passthrough_bits = 16; 485 break; 486 case V4L2_PIX_FMT_RGB565: 487 if (passthrough) { 488 burst_size = 16; 489 passthrough_bits = 8; 490 passthrough_cycles = incc->cycles; 491 break; 492 } 493 fallthrough; /* non-passthrough RGB565 (CSI-2 bus) */ 494 default: 495 burst_size = (image.pix.width & 0xf) ? 8 : 16; 496 passthrough_bits = 16; 497 break; 498 } 499 500 if (passthrough) { 501 if (priv->interweave_swap) { 502 /* start interweave scan at 1st top line (2nd line) */ 503 image.phys0 += image.pix.bytesperline; 504 image.phys1 += image.pix.bytesperline; 505 } 506 507 ipu_cpmem_set_resolution(priv->idmac_ch, 508 image.rect.width * passthrough_cycles, 509 image.rect.height); 510 ipu_cpmem_set_stride(priv->idmac_ch, image.pix.bytesperline); 511 ipu_cpmem_set_buffer(priv->idmac_ch, 0, image.phys0); 512 ipu_cpmem_set_buffer(priv->idmac_ch, 1, image.phys1); 513 ipu_cpmem_set_format_passthrough(priv->idmac_ch, 514 passthrough_bits); 515 } else { 516 if (priv->interweave_swap) { 517 /* start interweave scan at 1st top line (2nd line) */ 518 image.rect.top = 1; 519 } 520 521 ret = ipu_cpmem_set_image(priv->idmac_ch, &image); 522 if (ret) 523 goto unsetup_vb2; 524 } 525 526 ipu_cpmem_set_burstsize(priv->idmac_ch, burst_size); 527 528 /* 529 * Set the channel for the direct CSI-->memory via SMFC 530 * use-case to very high priority, by enabling the watermark 531 * signal in the SMFC, enabling WM in the channel, and setting 532 * the channel priority to high. 533 * 534 * Refer to the i.mx6 rev. D TRM Table 36-8: Calculated priority 535 * value. 536 * 537 * The WM's are set very low by intention here to ensure that 538 * the SMFC FIFOs do not overflow. 539 */ 540 ipu_smfc_set_watermark(priv->smfc, 0x02, 0x01); 541 ipu_cpmem_set_high_priority(priv->idmac_ch); 542 ipu_idmac_enable_watermark(priv->idmac_ch, true); 543 ipu_cpmem_set_axi_id(priv->idmac_ch, 0); 544 545 burst_size = passthrough ? 546 (burst_size >> 3) - 1 : (burst_size >> 2) - 1; 547 548 ipu_smfc_set_burstsize(priv->smfc, burst_size); 549 550 if (interweave) 551 ipu_cpmem_interlaced_scan(priv->idmac_ch, 552 priv->interweave_swap ? 553 -image.pix.bytesperline : 554 image.pix.bytesperline, 555 image.pix.pixelformat); 556 557 ipu_idmac_set_double_buffer(priv->idmac_ch, true); 558 559 return 0; 560 561unsetup_vb2: 562 csi_idmac_unsetup_vb2_buf(priv, VB2_BUF_STATE_QUEUED); 563 return ret; 564} 565 566static void csi_idmac_unsetup(struct csi_priv *priv, 567 enum vb2_buffer_state state) 568{ 569 ipu_idmac_disable_channel(priv->idmac_ch); 570 ipu_smfc_disable(priv->smfc); 571 572 csi_idmac_unsetup_vb2_buf(priv, state); 573} 574 575static int csi_idmac_setup(struct csi_priv *priv) 576{ 577 int ret; 578 579 ret = csi_idmac_setup_channel(priv); 580 if (ret) 581 return ret; 582 583 ipu_cpmem_dump(priv->idmac_ch); 584 ipu_dump(priv->ipu); 585 586 ipu_smfc_enable(priv->smfc); 587 588 /* set buffers ready */ 589 ipu_idmac_select_buffer(priv->idmac_ch, 0); 590 ipu_idmac_select_buffer(priv->idmac_ch, 1); 591 592 /* enable the channels */ 593 ipu_idmac_enable_channel(priv->idmac_ch); 594 595 return 0; 596} 597 598static int csi_idmac_start(struct csi_priv *priv) 599{ 600 struct imx_media_video_dev *vdev = priv->vdev; 601 int ret; 602 603 ret = csi_idmac_get_ipu_resources(priv); 604 if (ret) 605 return ret; 606 607 ipu_smfc_map_channel(priv->smfc, priv->csi_id, priv->vc_num); 608 609 ret = imx_media_alloc_dma_buf(priv->dev, &priv->underrun_buf, 610 vdev->fmt.sizeimage); 611 if (ret) 612 goto out_put_ipu; 613 614 priv->ipu_buf_num = 0; 615 616 /* init EOF completion waitq */ 617 init_completion(&priv->last_eof_comp); 618 priv->frame_sequence = 0; 619 priv->last_eof = false; 620 priv->nfb4eof = false; 621 622 ret = csi_idmac_setup(priv); 623 if (ret) { 624 v4l2_err(&priv->sd, "csi_idmac_setup failed: %d\n", ret); 625 goto out_free_dma_buf; 626 } 627 628 priv->nfb4eof_irq = ipu_idmac_channel_irq(priv->ipu, 629 priv->idmac_ch, 630 IPU_IRQ_NFB4EOF); 631 ret = devm_request_irq(priv->dev, priv->nfb4eof_irq, 632 csi_idmac_nfb4eof_interrupt, 0, 633 "imx-smfc-nfb4eof", priv); 634 if (ret) { 635 v4l2_err(&priv->sd, 636 "Error registering NFB4EOF irq: %d\n", ret); 637 goto out_unsetup; 638 } 639 640 priv->eof_irq = ipu_idmac_channel_irq(priv->ipu, priv->idmac_ch, 641 IPU_IRQ_EOF); 642 643 ret = devm_request_irq(priv->dev, priv->eof_irq, 644 csi_idmac_eof_interrupt, 0, 645 "imx-smfc-eof", priv); 646 if (ret) { 647 v4l2_err(&priv->sd, 648 "Error registering eof irq: %d\n", ret); 649 goto out_free_nfb4eof_irq; 650 } 651 652 /* start the EOF timeout timer */ 653 mod_timer(&priv->eof_timeout_timer, 654 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT)); 655 656 return 0; 657 658out_free_nfb4eof_irq: 659 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv); 660out_unsetup: 661 csi_idmac_unsetup(priv, VB2_BUF_STATE_QUEUED); 662out_free_dma_buf: 663 imx_media_free_dma_buf(priv->dev, &priv->underrun_buf); 664out_put_ipu: 665 csi_idmac_put_ipu_resources(priv); 666 return ret; 667} 668 669static void csi_idmac_wait_last_eof(struct csi_priv *priv) 670{ 671 unsigned long flags; 672 int ret; 673 674 /* mark next EOF interrupt as the last before stream off */ 675 spin_lock_irqsave(&priv->irqlock, flags); 676 priv->last_eof = true; 677 spin_unlock_irqrestore(&priv->irqlock, flags); 678 679 /* 680 * and then wait for interrupt handler to mark completion. 681 */ 682 ret = wait_for_completion_timeout( 683 &priv->last_eof_comp, msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT)); 684 if (ret == 0) 685 v4l2_warn(&priv->sd, "wait last EOF timeout\n"); 686} 687 688static void csi_idmac_stop(struct csi_priv *priv) 689{ 690 devm_free_irq(priv->dev, priv->eof_irq, priv); 691 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv); 692 693 csi_idmac_unsetup(priv, VB2_BUF_STATE_ERROR); 694 695 imx_media_free_dma_buf(priv->dev, &priv->underrun_buf); 696 697 /* cancel the EOF timeout timer */ 698 del_timer_sync(&priv->eof_timeout_timer); 699 700 csi_idmac_put_ipu_resources(priv); 701} 702 703/* Update the CSI whole sensor and active windows */ 704static int csi_setup(struct csi_priv *priv) 705{ 706 struct v4l2_mbus_framefmt *infmt, *outfmt; 707 const struct imx_media_pixfmt *incc; 708 struct v4l2_mbus_framefmt if_fmt; 709 struct v4l2_rect crop; 710 711 infmt = &priv->format_mbus[CSI_SINK_PAD]; 712 incc = priv->cc[CSI_SINK_PAD]; 713 outfmt = &priv->format_mbus[priv->active_output_pad]; 714 715 if_fmt = *infmt; 716 crop = priv->crop; 717 718 /* 719 * if cycles is set, we need to handle this over multiple cycles as 720 * generic/bayer data 721 */ 722 if (is_parallel_bus(&priv->mbus_cfg) && incc->cycles) { 723 if_fmt.width *= incc->cycles; 724 crop.width *= incc->cycles; 725 } 726 727 ipu_csi_set_window(priv->csi, &crop); 728 729 ipu_csi_set_downsize(priv->csi, 730 priv->crop.width == 2 * priv->compose.width, 731 priv->crop.height == 2 * priv->compose.height); 732 733 ipu_csi_init_interface(priv->csi, &priv->mbus_cfg, &if_fmt, outfmt); 734 735 ipu_csi_set_dest(priv->csi, priv->dest); 736 737 if (priv->dest == IPU_CSI_DEST_IDMAC) 738 ipu_csi_set_skip_smfc(priv->csi, priv->skip->skip_smfc, 739 priv->skip->max_ratio - 1, 0); 740 741 ipu_csi_dump(priv->csi); 742 743 return 0; 744} 745 746static int csi_start(struct csi_priv *priv) 747{ 748 struct v4l2_fract *input_fi, *output_fi; 749 int ret; 750 751 input_fi = &priv->frame_interval[CSI_SINK_PAD]; 752 output_fi = &priv->frame_interval[priv->active_output_pad]; 753 754 /* start upstream */ 755 ret = v4l2_subdev_call(priv->src_sd, video, s_stream, 1); 756 ret = (ret && ret != -ENOIOCTLCMD) ? ret : 0; 757 if (ret) 758 return ret; 759 760 /* Skip first few frames from a BT.656 source */ 761 if (priv->mbus_cfg.type == V4L2_MBUS_BT656) { 762 u32 delay_usec, bad_frames = 20; 763 764 delay_usec = DIV_ROUND_UP_ULL((u64)USEC_PER_SEC * 765 input_fi->numerator * bad_frames, 766 input_fi->denominator); 767 768 usleep_range(delay_usec, delay_usec + 1000); 769 } 770 771 if (priv->dest == IPU_CSI_DEST_IDMAC) { 772 ret = csi_idmac_start(priv); 773 if (ret) 774 goto stop_upstream; 775 } 776 777 ret = csi_setup(priv); 778 if (ret) 779 goto idmac_stop; 780 781 /* start the frame interval monitor */ 782 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC) 783 imx_media_fim_set_stream(priv->fim, output_fi, true); 784 785 ret = ipu_csi_enable(priv->csi); 786 if (ret) { 787 v4l2_err(&priv->sd, "CSI enable error: %d\n", ret); 788 goto fim_off; 789 } 790 791 return 0; 792 793fim_off: 794 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC) 795 imx_media_fim_set_stream(priv->fim, NULL, false); 796idmac_stop: 797 if (priv->dest == IPU_CSI_DEST_IDMAC) 798 csi_idmac_stop(priv); 799stop_upstream: 800 v4l2_subdev_call(priv->src_sd, video, s_stream, 0); 801 return ret; 802} 803 804static void csi_stop(struct csi_priv *priv) 805{ 806 if (priv->dest == IPU_CSI_DEST_IDMAC) 807 csi_idmac_wait_last_eof(priv); 808 809 /* 810 * Disable the CSI asap, after syncing with the last EOF. 811 * Doing so after the IDMA channel is disabled has shown to 812 * create hard system-wide hangs. 813 */ 814 ipu_csi_disable(priv->csi); 815 816 /* stop upstream */ 817 v4l2_subdev_call(priv->src_sd, video, s_stream, 0); 818 819 if (priv->dest == IPU_CSI_DEST_IDMAC) { 820 csi_idmac_stop(priv); 821 822 /* stop the frame interval monitor */ 823 if (priv->fim) 824 imx_media_fim_set_stream(priv->fim, NULL, false); 825 } 826} 827 828static const struct csi_skip_desc csi_skip[12] = { 829 { 1, 1, 0x00 }, /* Keep all frames */ 830 { 5, 6, 0x10 }, /* Skip every sixth frame */ 831 { 4, 5, 0x08 }, /* Skip every fifth frame */ 832 { 3, 4, 0x04 }, /* Skip every fourth frame */ 833 { 2, 3, 0x02 }, /* Skip every third frame */ 834 { 3, 5, 0x0a }, /* Skip frames 1 and 3 of every 5 */ 835 { 1, 2, 0x01 }, /* Skip every second frame */ 836 { 2, 5, 0x0b }, /* Keep frames 1 and 4 of every 5 */ 837 { 1, 3, 0x03 }, /* Keep one in three frames */ 838 { 1, 4, 0x07 }, /* Keep one in four frames */ 839 { 1, 5, 0x0f }, /* Keep one in five frames */ 840 { 1, 6, 0x1f }, /* Keep one in six frames */ 841}; 842 843static void csi_apply_skip_interval(const struct csi_skip_desc *skip, 844 struct v4l2_fract *interval) 845{ 846 unsigned int div; 847 848 interval->numerator *= skip->max_ratio; 849 interval->denominator *= skip->keep; 850 851 /* Reduce fraction to lowest terms */ 852 div = gcd(interval->numerator, interval->denominator); 853 if (div > 1) { 854 interval->numerator /= div; 855 interval->denominator /= div; 856 } 857} 858 859/* 860 * Find the skip pattern to produce the output frame interval closest to the 861 * requested one, for the given input frame interval. Updates the output frame 862 * interval to the exact value. 863 */ 864static const struct csi_skip_desc *csi_find_best_skip(struct v4l2_fract *in, 865 struct v4l2_fract *out) 866{ 867 const struct csi_skip_desc *skip = &csi_skip[0], *best_skip = skip; 868 u32 min_err = UINT_MAX; 869 u64 want_us; 870 int i; 871 872 /* Default to 1:1 ratio */ 873 if (out->numerator == 0 || out->denominator == 0 || 874 in->numerator == 0 || in->denominator == 0) { 875 *out = *in; 876 return best_skip; 877 } 878 879 want_us = div_u64((u64)USEC_PER_SEC * out->numerator, out->denominator); 880 881 /* Find the reduction closest to the requested time per frame */ 882 for (i = 0; i < ARRAY_SIZE(csi_skip); i++, skip++) { 883 u64 tmp, err; 884 885 tmp = div_u64((u64)USEC_PER_SEC * in->numerator * 886 skip->max_ratio, in->denominator * skip->keep); 887 888 err = abs((s64)tmp - want_us); 889 if (err < min_err) { 890 min_err = err; 891 best_skip = skip; 892 } 893 } 894 895 *out = *in; 896 csi_apply_skip_interval(best_skip, out); 897 898 return best_skip; 899} 900 901/* 902 * V4L2 subdev operations. 903 */ 904 905static int csi_get_frame_interval(struct v4l2_subdev *sd, 906 struct v4l2_subdev_state *sd_state, 907 struct v4l2_subdev_frame_interval *fi) 908{ 909 struct csi_priv *priv = v4l2_get_subdevdata(sd); 910 911 /* 912 * FIXME: Implement support for V4L2_SUBDEV_FORMAT_TRY, using the V4L2 913 * subdev active state API. 914 */ 915 if (fi->which != V4L2_SUBDEV_FORMAT_ACTIVE) 916 return -EINVAL; 917 918 if (fi->pad >= CSI_NUM_PADS) 919 return -EINVAL; 920 921 mutex_lock(&priv->lock); 922 923 fi->interval = priv->frame_interval[fi->pad]; 924 925 mutex_unlock(&priv->lock); 926 927 return 0; 928} 929 930static int csi_set_frame_interval(struct v4l2_subdev *sd, 931 struct v4l2_subdev_state *sd_state, 932 struct v4l2_subdev_frame_interval *fi) 933{ 934 struct csi_priv *priv = v4l2_get_subdevdata(sd); 935 struct v4l2_fract *input_fi; 936 int ret = 0; 937 938 /* 939 * FIXME: Implement support for V4L2_SUBDEV_FORMAT_TRY, using the V4L2 940 * subdev active state API. 941 */ 942 if (fi->which != V4L2_SUBDEV_FORMAT_ACTIVE) 943 return -EINVAL; 944 945 mutex_lock(&priv->lock); 946 947 input_fi = &priv->frame_interval[CSI_SINK_PAD]; 948 949 switch (fi->pad) { 950 case CSI_SINK_PAD: 951 /* No limits on valid input frame intervals */ 952 if (fi->interval.numerator == 0 || 953 fi->interval.denominator == 0) 954 fi->interval = *input_fi; 955 /* Reset output intervals and frame skipping ratio to 1:1 */ 956 priv->frame_interval[CSI_SRC_PAD_IDMAC] = fi->interval; 957 priv->frame_interval[CSI_SRC_PAD_DIRECT] = fi->interval; 958 priv->skip = &csi_skip[0]; 959 break; 960 case CSI_SRC_PAD_IDMAC: 961 /* 962 * frame interval at IDMAC output pad depends on input 963 * interval, modified by frame skipping. 964 */ 965 priv->skip = csi_find_best_skip(input_fi, &fi->interval); 966 break; 967 case CSI_SRC_PAD_DIRECT: 968 /* 969 * frame interval at DIRECT output pad is same as input 970 * interval. 971 */ 972 fi->interval = *input_fi; 973 break; 974 default: 975 ret = -EINVAL; 976 goto out; 977 } 978 979 priv->frame_interval[fi->pad] = fi->interval; 980out: 981 mutex_unlock(&priv->lock); 982 return ret; 983} 984 985static int csi_s_stream(struct v4l2_subdev *sd, int enable) 986{ 987 struct csi_priv *priv = v4l2_get_subdevdata(sd); 988 int ret = 0; 989 990 mutex_lock(&priv->lock); 991 992 if (!priv->src_sd || !priv->sink) { 993 ret = -EPIPE; 994 goto out; 995 } 996 997 /* 998 * enable/disable streaming only if stream_count is 999 * going from 0 to 1 / 1 to 0. 1000 */ 1001 if (priv->stream_count != !enable) 1002 goto update_count; 1003 1004 if (enable) { 1005 dev_dbg(priv->dev, "stream ON\n"); 1006 ret = csi_start(priv); 1007 if (ret) 1008 goto out; 1009 } else { 1010 dev_dbg(priv->dev, "stream OFF\n"); 1011 csi_stop(priv); 1012 } 1013 1014update_count: 1015 priv->stream_count += enable ? 1 : -1; 1016 if (priv->stream_count < 0) 1017 priv->stream_count = 0; 1018out: 1019 mutex_unlock(&priv->lock); 1020 return ret; 1021} 1022 1023static int csi_link_setup(struct media_entity *entity, 1024 const struct media_pad *local, 1025 const struct media_pad *remote, u32 flags) 1026{ 1027 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); 1028 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1029 struct v4l2_subdev *remote_sd; 1030 int ret = 0; 1031 1032 dev_dbg(priv->dev, "link setup %s -> %s\n", remote->entity->name, 1033 local->entity->name); 1034 1035 mutex_lock(&priv->lock); 1036 1037 if (local->flags & MEDIA_PAD_FL_SINK) { 1038 if (!is_media_entity_v4l2_subdev(remote->entity)) { 1039 ret = -EINVAL; 1040 goto out; 1041 } 1042 1043 remote_sd = media_entity_to_v4l2_subdev(remote->entity); 1044 1045 if (flags & MEDIA_LNK_FL_ENABLED) { 1046 if (priv->src_sd) { 1047 ret = -EBUSY; 1048 goto out; 1049 } 1050 priv->src_sd = remote_sd; 1051 } else { 1052 priv->src_sd = NULL; 1053 } 1054 1055 goto out; 1056 } 1057 1058 /* this is a source pad */ 1059 1060 if (flags & MEDIA_LNK_FL_ENABLED) { 1061 if (priv->sink) { 1062 ret = -EBUSY; 1063 goto out; 1064 } 1065 } else { 1066 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 1067 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0); 1068 priv->sink = NULL; 1069 /* do not apply IC burst alignment in csi_try_crop */ 1070 priv->active_output_pad = CSI_SRC_PAD_IDMAC; 1071 goto out; 1072 } 1073 1074 /* record which output pad is now active */ 1075 priv->active_output_pad = local->index; 1076 1077 /* set CSI destination */ 1078 if (local->index == CSI_SRC_PAD_IDMAC) { 1079 if (!is_media_entity_v4l2_video_device(remote->entity)) { 1080 ret = -EINVAL; 1081 goto out; 1082 } 1083 1084 if (priv->fim) { 1085 ret = imx_media_fim_add_controls(priv->fim); 1086 if (ret) 1087 goto out; 1088 } 1089 1090 priv->dest = IPU_CSI_DEST_IDMAC; 1091 } else { 1092 if (!is_media_entity_v4l2_subdev(remote->entity)) { 1093 ret = -EINVAL; 1094 goto out; 1095 } 1096 1097 remote_sd = media_entity_to_v4l2_subdev(remote->entity); 1098 switch (remote_sd->grp_id) { 1099 case IMX_MEDIA_GRP_ID_IPU_VDIC: 1100 priv->dest = IPU_CSI_DEST_VDIC; 1101 break; 1102 case IMX_MEDIA_GRP_ID_IPU_IC_PRP: 1103 priv->dest = IPU_CSI_DEST_IC; 1104 break; 1105 default: 1106 ret = -EINVAL; 1107 goto out; 1108 } 1109 } 1110 1111 priv->sink = remote->entity; 1112out: 1113 mutex_unlock(&priv->lock); 1114 return ret; 1115} 1116 1117static int csi_link_validate(struct v4l2_subdev *sd, 1118 struct media_link *link, 1119 struct v4l2_subdev_format *source_fmt, 1120 struct v4l2_subdev_format *sink_fmt) 1121{ 1122 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1123 struct v4l2_mbus_config mbus_cfg = { .type = 0 }; 1124 bool is_csi2; 1125 int ret; 1126 1127 ret = v4l2_subdev_link_validate_default(sd, link, 1128 source_fmt, sink_fmt); 1129 if (ret) 1130 return ret; 1131 1132 ret = csi_get_upstream_mbus_config(priv, &mbus_cfg); 1133 if (ret) { 1134 v4l2_err(&priv->sd, 1135 "failed to get upstream media bus configuration\n"); 1136 return ret; 1137 } 1138 1139 mutex_lock(&priv->lock); 1140 1141 priv->mbus_cfg = mbus_cfg; 1142 is_csi2 = !is_parallel_bus(&mbus_cfg); 1143 if (is_csi2) { 1144 /* 1145 * NOTE! It seems the virtual channels from the mipi csi-2 1146 * receiver are used only for routing by the video mux's, 1147 * or for hard-wired routing to the CSI's. Once the stream 1148 * enters the CSI's however, they are treated internally 1149 * in the IPU as virtual channel 0. 1150 */ 1151 ipu_csi_set_mipi_datatype(priv->csi, 0, 1152 &priv->format_mbus[CSI_SINK_PAD]); 1153 } 1154 1155 /* select either parallel or MIPI-CSI2 as input to CSI */ 1156 ipu_set_csi_src_mux(priv->ipu, priv->csi_id, is_csi2); 1157 1158 mutex_unlock(&priv->lock); 1159 return ret; 1160} 1161 1162static struct v4l2_mbus_framefmt * 1163__csi_get_fmt(struct csi_priv *priv, struct v4l2_subdev_state *sd_state, 1164 unsigned int pad, enum v4l2_subdev_format_whence which) 1165{ 1166 if (which == V4L2_SUBDEV_FORMAT_TRY) 1167 return v4l2_subdev_state_get_format(sd_state, pad); 1168 else 1169 return &priv->format_mbus[pad]; 1170} 1171 1172static struct v4l2_rect * 1173__csi_get_crop(struct csi_priv *priv, struct v4l2_subdev_state *sd_state, 1174 enum v4l2_subdev_format_whence which) 1175{ 1176 if (which == V4L2_SUBDEV_FORMAT_TRY) 1177 return v4l2_subdev_state_get_crop(sd_state, CSI_SINK_PAD); 1178 else 1179 return &priv->crop; 1180} 1181 1182static struct v4l2_rect * 1183__csi_get_compose(struct csi_priv *priv, struct v4l2_subdev_state *sd_state, 1184 enum v4l2_subdev_format_whence which) 1185{ 1186 if (which == V4L2_SUBDEV_FORMAT_TRY) 1187 return v4l2_subdev_state_get_compose(sd_state, CSI_SINK_PAD); 1188 else 1189 return &priv->compose; 1190} 1191 1192static void csi_try_crop(struct csi_priv *priv, 1193 struct v4l2_rect *crop, 1194 struct v4l2_subdev_state *sd_state, 1195 struct v4l2_mbus_framefmt *infmt, 1196 struct v4l2_mbus_config *mbus_cfg) 1197{ 1198 u32 in_height; 1199 1200 crop->width = min_t(__u32, infmt->width, crop->width); 1201 if (crop->left + crop->width > infmt->width) 1202 crop->left = infmt->width - crop->width; 1203 /* adjust crop left/width to h/w alignment restrictions */ 1204 crop->left &= ~0x3; 1205 if (priv->active_output_pad == CSI_SRC_PAD_DIRECT) 1206 crop->width &= ~0x7; /* multiple of 8 pixels (IC burst) */ 1207 else 1208 crop->width &= ~0x1; /* multiple of 2 pixels */ 1209 1210 in_height = infmt->height; 1211 if (infmt->field == V4L2_FIELD_ALTERNATE) 1212 in_height *= 2; 1213 1214 /* 1215 * FIXME: not sure why yet, but on interlaced bt.656, 1216 * changing the vertical cropping causes loss of vertical 1217 * sync, so fix it to NTSC/PAL active lines. NTSC contains 1218 * 2 extra lines of active video that need to be cropped. 1219 */ 1220 if (mbus_cfg->type == V4L2_MBUS_BT656 && 1221 (V4L2_FIELD_HAS_BOTH(infmt->field) || 1222 infmt->field == V4L2_FIELD_ALTERNATE)) { 1223 crop->height = in_height; 1224 crop->top = (in_height == 480) ? 2 : 0; 1225 } else { 1226 crop->height = min_t(__u32, in_height, crop->height); 1227 if (crop->top + crop->height > in_height) 1228 crop->top = in_height - crop->height; 1229 } 1230} 1231 1232static int csi_enum_mbus_code(struct v4l2_subdev *sd, 1233 struct v4l2_subdev_state *sd_state, 1234 struct v4l2_subdev_mbus_code_enum *code) 1235{ 1236 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1237 struct v4l2_mbus_config mbus_cfg = { .type = 0 }; 1238 const struct imx_media_pixfmt *incc; 1239 struct v4l2_mbus_framefmt *infmt; 1240 int ret = 0; 1241 1242 mutex_lock(&priv->lock); 1243 1244 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, code->which); 1245 incc = imx_media_find_mbus_format(infmt->code, PIXFMT_SEL_ANY); 1246 1247 switch (code->pad) { 1248 case CSI_SINK_PAD: 1249 ret = imx_media_enum_mbus_formats(&code->code, code->index, 1250 PIXFMT_SEL_ANY); 1251 break; 1252 case CSI_SRC_PAD_DIRECT: 1253 case CSI_SRC_PAD_IDMAC: 1254 ret = csi_get_upstream_mbus_config(priv, &mbus_cfg); 1255 if (ret) { 1256 v4l2_err(&priv->sd, 1257 "failed to get upstream media bus configuration\n"); 1258 goto out; 1259 } 1260 1261 if (requires_passthrough(&mbus_cfg, infmt, incc)) { 1262 if (code->index != 0) { 1263 ret = -EINVAL; 1264 goto out; 1265 } 1266 code->code = infmt->code; 1267 } else { 1268 enum imx_pixfmt_sel fmt_sel = 1269 (incc->cs == IPUV3_COLORSPACE_YUV) ? 1270 PIXFMT_SEL_YUV : PIXFMT_SEL_RGB; 1271 1272 ret = imx_media_enum_ipu_formats(&code->code, 1273 code->index, 1274 fmt_sel); 1275 } 1276 break; 1277 default: 1278 ret = -EINVAL; 1279 } 1280 1281out: 1282 mutex_unlock(&priv->lock); 1283 return ret; 1284} 1285 1286static int csi_enum_frame_size(struct v4l2_subdev *sd, 1287 struct v4l2_subdev_state *sd_state, 1288 struct v4l2_subdev_frame_size_enum *fse) 1289{ 1290 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1291 struct v4l2_rect *crop; 1292 int ret = 0; 1293 1294 if (fse->pad >= CSI_NUM_PADS || 1295 fse->index > (fse->pad == CSI_SINK_PAD ? 0 : 3)) 1296 return -EINVAL; 1297 1298 mutex_lock(&priv->lock); 1299 1300 if (fse->pad == CSI_SINK_PAD) { 1301 fse->min_width = MIN_W; 1302 fse->max_width = MAX_W; 1303 fse->min_height = MIN_H; 1304 fse->max_height = MAX_H; 1305 } else { 1306 crop = __csi_get_crop(priv, sd_state, fse->which); 1307 1308 fse->min_width = fse->index & 1 ? 1309 crop->width / 2 : crop->width; 1310 fse->max_width = fse->min_width; 1311 fse->min_height = fse->index & 2 ? 1312 crop->height / 2 : crop->height; 1313 fse->max_height = fse->min_height; 1314 } 1315 1316 mutex_unlock(&priv->lock); 1317 return ret; 1318} 1319 1320static int csi_enum_frame_interval(struct v4l2_subdev *sd, 1321 struct v4l2_subdev_state *sd_state, 1322 struct v4l2_subdev_frame_interval_enum *fie) 1323{ 1324 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1325 struct v4l2_fract *input_fi; 1326 struct v4l2_rect *crop; 1327 int ret = 0; 1328 1329 if (fie->pad >= CSI_NUM_PADS || 1330 fie->index >= (fie->pad != CSI_SRC_PAD_IDMAC ? 1331 1 : ARRAY_SIZE(csi_skip))) 1332 return -EINVAL; 1333 1334 mutex_lock(&priv->lock); 1335 1336 input_fi = &priv->frame_interval[CSI_SINK_PAD]; 1337 crop = __csi_get_crop(priv, sd_state, fie->which); 1338 1339 if ((fie->width != crop->width && fie->width != crop->width / 2) || 1340 (fie->height != crop->height && fie->height != crop->height / 2)) { 1341 ret = -EINVAL; 1342 goto out; 1343 } 1344 1345 fie->interval = *input_fi; 1346 1347 if (fie->pad == CSI_SRC_PAD_IDMAC) 1348 csi_apply_skip_interval(&csi_skip[fie->index], 1349 &fie->interval); 1350 1351out: 1352 mutex_unlock(&priv->lock); 1353 return ret; 1354} 1355 1356static int csi_get_fmt(struct v4l2_subdev *sd, 1357 struct v4l2_subdev_state *sd_state, 1358 struct v4l2_subdev_format *sdformat) 1359{ 1360 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1361 struct v4l2_mbus_framefmt *fmt; 1362 int ret = 0; 1363 1364 if (sdformat->pad >= CSI_NUM_PADS) 1365 return -EINVAL; 1366 1367 mutex_lock(&priv->lock); 1368 1369 fmt = __csi_get_fmt(priv, sd_state, sdformat->pad, sdformat->which); 1370 if (!fmt) { 1371 ret = -EINVAL; 1372 goto out; 1373 } 1374 1375 sdformat->format = *fmt; 1376out: 1377 mutex_unlock(&priv->lock); 1378 return ret; 1379} 1380 1381static void csi_try_field(struct csi_priv *priv, 1382 struct v4l2_subdev_state *sd_state, 1383 struct v4l2_subdev_format *sdformat) 1384{ 1385 struct v4l2_mbus_framefmt *infmt = 1386 __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sdformat->which); 1387 1388 /* 1389 * no restrictions on sink pad field type except must 1390 * be initialized. 1391 */ 1392 if (sdformat->pad == CSI_SINK_PAD) { 1393 if (sdformat->format.field == V4L2_FIELD_ANY) 1394 sdformat->format.field = V4L2_FIELD_NONE; 1395 return; 1396 } 1397 1398 switch (infmt->field) { 1399 case V4L2_FIELD_SEQ_TB: 1400 case V4L2_FIELD_SEQ_BT: 1401 /* 1402 * If the user requests sequential at the source pad, 1403 * allow it (along with possibly inverting field order). 1404 * Otherwise passthrough the field type. 1405 */ 1406 if (!V4L2_FIELD_IS_SEQUENTIAL(sdformat->format.field)) 1407 sdformat->format.field = infmt->field; 1408 break; 1409 case V4L2_FIELD_ALTERNATE: 1410 /* 1411 * This driver does not support alternate field mode, and 1412 * the CSI captures a whole frame, so the CSI never presents 1413 * alternate mode at its source pads. If user has not 1414 * already requested sequential, translate ALTERNATE at 1415 * sink pad to SEQ_TB or SEQ_BT at the source pad depending 1416 * on input height (assume NTSC BT order if 480 total active 1417 * frame lines, otherwise PAL TB order). 1418 */ 1419 if (!V4L2_FIELD_IS_SEQUENTIAL(sdformat->format.field)) 1420 sdformat->format.field = (infmt->height == 480 / 2) ? 1421 V4L2_FIELD_SEQ_BT : V4L2_FIELD_SEQ_TB; 1422 break; 1423 default: 1424 /* Passthrough for all other input field types */ 1425 sdformat->format.field = infmt->field; 1426 break; 1427 } 1428} 1429 1430static void csi_try_fmt(struct csi_priv *priv, 1431 struct v4l2_mbus_config *mbus_cfg, 1432 struct v4l2_subdev_state *sd_state, 1433 struct v4l2_subdev_format *sdformat, 1434 struct v4l2_rect *crop, 1435 struct v4l2_rect *compose, 1436 const struct imx_media_pixfmt **cc) 1437{ 1438 const struct imx_media_pixfmt *incc; 1439 struct v4l2_mbus_framefmt *infmt; 1440 u32 code; 1441 1442 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sdformat->which); 1443 1444 switch (sdformat->pad) { 1445 case CSI_SRC_PAD_DIRECT: 1446 case CSI_SRC_PAD_IDMAC: 1447 incc = imx_media_find_mbus_format(infmt->code, PIXFMT_SEL_ANY); 1448 1449 sdformat->format.width = compose->width; 1450 sdformat->format.height = compose->height; 1451 1452 if (requires_passthrough(mbus_cfg, infmt, incc)) { 1453 sdformat->format.code = infmt->code; 1454 *cc = incc; 1455 } else { 1456 enum imx_pixfmt_sel fmt_sel = 1457 (incc->cs == IPUV3_COLORSPACE_YUV) ? 1458 PIXFMT_SEL_YUV : PIXFMT_SEL_RGB; 1459 1460 *cc = imx_media_find_ipu_format(sdformat->format.code, 1461 fmt_sel); 1462 if (!*cc) { 1463 imx_media_enum_ipu_formats(&code, 0, fmt_sel); 1464 *cc = imx_media_find_ipu_format(code, fmt_sel); 1465 sdformat->format.code = (*cc)->codes[0]; 1466 } 1467 } 1468 1469 csi_try_field(priv, sd_state, sdformat); 1470 1471 /* propagate colorimetry from sink */ 1472 sdformat->format.colorspace = infmt->colorspace; 1473 sdformat->format.xfer_func = infmt->xfer_func; 1474 sdformat->format.quantization = infmt->quantization; 1475 sdformat->format.ycbcr_enc = infmt->ycbcr_enc; 1476 1477 break; 1478 case CSI_SINK_PAD: 1479 v4l_bound_align_image(&sdformat->format.width, MIN_W, MAX_W, 1480 W_ALIGN, &sdformat->format.height, 1481 MIN_H, MAX_H, H_ALIGN, S_ALIGN); 1482 1483 *cc = imx_media_find_mbus_format(sdformat->format.code, 1484 PIXFMT_SEL_ANY); 1485 if (!*cc) { 1486 imx_media_enum_mbus_formats(&code, 0, 1487 PIXFMT_SEL_YUV_RGB); 1488 *cc = imx_media_find_mbus_format(code, 1489 PIXFMT_SEL_YUV_RGB); 1490 sdformat->format.code = (*cc)->codes[0]; 1491 } 1492 1493 csi_try_field(priv, sd_state, sdformat); 1494 1495 /* Reset crop and compose rectangles */ 1496 crop->left = 0; 1497 crop->top = 0; 1498 crop->width = sdformat->format.width; 1499 crop->height = sdformat->format.height; 1500 if (sdformat->format.field == V4L2_FIELD_ALTERNATE) 1501 crop->height *= 2; 1502 csi_try_crop(priv, crop, sd_state, &sdformat->format, mbus_cfg); 1503 compose->left = 0; 1504 compose->top = 0; 1505 compose->width = crop->width; 1506 compose->height = crop->height; 1507 1508 break; 1509 } 1510 1511 imx_media_try_colorimetry(&sdformat->format, 1512 priv->active_output_pad == CSI_SRC_PAD_DIRECT); 1513} 1514 1515static int csi_set_fmt(struct v4l2_subdev *sd, 1516 struct v4l2_subdev_state *sd_state, 1517 struct v4l2_subdev_format *sdformat) 1518{ 1519 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1520 struct v4l2_mbus_config mbus_cfg = { .type = 0 }; 1521 const struct imx_media_pixfmt *cc; 1522 struct v4l2_mbus_framefmt *fmt; 1523 struct v4l2_rect *crop, *compose; 1524 int ret; 1525 1526 if (sdformat->pad >= CSI_NUM_PADS) 1527 return -EINVAL; 1528 1529 ret = csi_get_upstream_mbus_config(priv, &mbus_cfg); 1530 if (ret) { 1531 v4l2_err(&priv->sd, 1532 "failed to get upstream media bus configuration\n"); 1533 return ret; 1534 } 1535 1536 mutex_lock(&priv->lock); 1537 1538 if (priv->stream_count > 0) { 1539 ret = -EBUSY; 1540 goto out; 1541 } 1542 1543 crop = __csi_get_crop(priv, sd_state, sdformat->which); 1544 compose = __csi_get_compose(priv, sd_state, sdformat->which); 1545 1546 csi_try_fmt(priv, &mbus_cfg, sd_state, sdformat, crop, compose, &cc); 1547 1548 fmt = __csi_get_fmt(priv, sd_state, sdformat->pad, sdformat->which); 1549 *fmt = sdformat->format; 1550 1551 if (sdformat->pad == CSI_SINK_PAD) { 1552 int pad; 1553 1554 /* propagate format to source pads */ 1555 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) { 1556 const struct imx_media_pixfmt *outcc; 1557 struct v4l2_mbus_framefmt *outfmt; 1558 struct v4l2_subdev_format format; 1559 1560 format.pad = pad; 1561 format.which = sdformat->which; 1562 format.format = sdformat->format; 1563 csi_try_fmt(priv, &mbus_cfg, sd_state, &format, NULL, 1564 compose, &outcc); 1565 1566 outfmt = __csi_get_fmt(priv, sd_state, pad, 1567 sdformat->which); 1568 *outfmt = format.format; 1569 1570 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE) 1571 priv->cc[pad] = outcc; 1572 } 1573 } 1574 1575 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE) 1576 priv->cc[sdformat->pad] = cc; 1577 1578out: 1579 mutex_unlock(&priv->lock); 1580 return ret; 1581} 1582 1583static int csi_get_selection(struct v4l2_subdev *sd, 1584 struct v4l2_subdev_state *sd_state, 1585 struct v4l2_subdev_selection *sel) 1586{ 1587 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1588 struct v4l2_mbus_framefmt *infmt; 1589 struct v4l2_rect *crop, *compose; 1590 int ret = 0; 1591 1592 if (sel->pad != CSI_SINK_PAD) 1593 return -EINVAL; 1594 1595 mutex_lock(&priv->lock); 1596 1597 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sel->which); 1598 crop = __csi_get_crop(priv, sd_state, sel->which); 1599 compose = __csi_get_compose(priv, sd_state, sel->which); 1600 1601 switch (sel->target) { 1602 case V4L2_SEL_TGT_CROP_BOUNDS: 1603 sel->r.left = 0; 1604 sel->r.top = 0; 1605 sel->r.width = infmt->width; 1606 sel->r.height = infmt->height; 1607 if (infmt->field == V4L2_FIELD_ALTERNATE) 1608 sel->r.height *= 2; 1609 break; 1610 case V4L2_SEL_TGT_CROP: 1611 sel->r = *crop; 1612 break; 1613 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 1614 sel->r.left = 0; 1615 sel->r.top = 0; 1616 sel->r.width = crop->width; 1617 sel->r.height = crop->height; 1618 break; 1619 case V4L2_SEL_TGT_COMPOSE: 1620 sel->r = *compose; 1621 break; 1622 default: 1623 ret = -EINVAL; 1624 } 1625 1626 mutex_unlock(&priv->lock); 1627 return ret; 1628} 1629 1630static int csi_set_scale(u32 *compose, u32 crop, u32 flags) 1631{ 1632 if ((flags & (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE)) == 1633 (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE) && 1634 *compose != crop && *compose != crop / 2) 1635 return -ERANGE; 1636 1637 if (*compose <= crop / 2 || 1638 (*compose < crop * 3 / 4 && !(flags & V4L2_SEL_FLAG_GE)) || 1639 (*compose < crop && (flags & V4L2_SEL_FLAG_LE))) 1640 *compose = crop / 2; 1641 else 1642 *compose = crop; 1643 1644 return 0; 1645} 1646 1647static int csi_set_selection(struct v4l2_subdev *sd, 1648 struct v4l2_subdev_state *sd_state, 1649 struct v4l2_subdev_selection *sel) 1650{ 1651 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1652 struct v4l2_mbus_config mbus_cfg = { .type = 0 }; 1653 struct v4l2_mbus_framefmt *infmt; 1654 struct v4l2_rect *crop, *compose; 1655 int pad, ret; 1656 1657 if (sel->pad != CSI_SINK_PAD) 1658 return -EINVAL; 1659 1660 ret = csi_get_upstream_mbus_config(priv, &mbus_cfg); 1661 if (ret) { 1662 v4l2_err(&priv->sd, 1663 "failed to get upstream media bus configuration\n"); 1664 return ret; 1665 } 1666 1667 mutex_lock(&priv->lock); 1668 1669 if (priv->stream_count > 0) { 1670 ret = -EBUSY; 1671 goto out; 1672 } 1673 1674 infmt = __csi_get_fmt(priv, sd_state, CSI_SINK_PAD, sel->which); 1675 crop = __csi_get_crop(priv, sd_state, sel->which); 1676 compose = __csi_get_compose(priv, sd_state, sel->which); 1677 1678 switch (sel->target) { 1679 case V4L2_SEL_TGT_CROP: 1680 /* 1681 * Modifying the crop rectangle always changes the format on 1682 * the source pads. If the KEEP_CONFIG flag is set, just return 1683 * the current crop rectangle. 1684 */ 1685 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) { 1686 sel->r = priv->crop; 1687 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1688 *crop = sel->r; 1689 goto out; 1690 } 1691 1692 csi_try_crop(priv, &sel->r, sd_state, infmt, &mbus_cfg); 1693 1694 *crop = sel->r; 1695 1696 /* Reset scaling to 1:1 */ 1697 compose->width = crop->width; 1698 compose->height = crop->height; 1699 break; 1700 case V4L2_SEL_TGT_COMPOSE: 1701 /* 1702 * Modifying the compose rectangle always changes the format on 1703 * the source pads. If the KEEP_CONFIG flag is set, just return 1704 * the current compose rectangle. 1705 */ 1706 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) { 1707 sel->r = priv->compose; 1708 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1709 *compose = sel->r; 1710 goto out; 1711 } 1712 1713 sel->r.left = 0; 1714 sel->r.top = 0; 1715 ret = csi_set_scale(&sel->r.width, crop->width, sel->flags); 1716 if (ret) 1717 goto out; 1718 ret = csi_set_scale(&sel->r.height, crop->height, sel->flags); 1719 if (ret) 1720 goto out; 1721 1722 *compose = sel->r; 1723 break; 1724 default: 1725 ret = -EINVAL; 1726 goto out; 1727 } 1728 1729 /* Reset source pads to sink compose rectangle */ 1730 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) { 1731 struct v4l2_mbus_framefmt *outfmt; 1732 1733 outfmt = __csi_get_fmt(priv, sd_state, pad, sel->which); 1734 outfmt->width = compose->width; 1735 outfmt->height = compose->height; 1736 } 1737 1738out: 1739 mutex_unlock(&priv->lock); 1740 return ret; 1741} 1742 1743static int csi_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, 1744 struct v4l2_event_subscription *sub) 1745{ 1746 if (sub->type != V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR) 1747 return -EINVAL; 1748 if (sub->id != 0) 1749 return -EINVAL; 1750 1751 return v4l2_event_subscribe(fh, sub, 0, NULL); 1752} 1753 1754static int csi_unsubscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, 1755 struct v4l2_event_subscription *sub) 1756{ 1757 return v4l2_event_unsubscribe(fh, sub); 1758} 1759 1760static int csi_registered(struct v4l2_subdev *sd) 1761{ 1762 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1763 struct ipu_csi *csi; 1764 int i, ret; 1765 u32 code; 1766 1767 /* get handle to IPU CSI */ 1768 csi = ipu_csi_get(priv->ipu, priv->csi_id); 1769 if (IS_ERR(csi)) { 1770 v4l2_err(&priv->sd, "failed to get CSI%d\n", priv->csi_id); 1771 return PTR_ERR(csi); 1772 } 1773 priv->csi = csi; 1774 1775 for (i = 0; i < CSI_NUM_PADS; i++) { 1776 code = 0; 1777 if (i != CSI_SINK_PAD) 1778 imx_media_enum_ipu_formats(&code, 0, PIXFMT_SEL_YUV); 1779 1780 /* set a default mbus format */ 1781 ret = imx_media_init_mbus_fmt(&priv->format_mbus[i], 1782 IMX_MEDIA_DEF_PIX_WIDTH, 1783 IMX_MEDIA_DEF_PIX_HEIGHT, code, 1784 V4L2_FIELD_NONE, &priv->cc[i]); 1785 if (ret) 1786 goto put_csi; 1787 1788 /* init default frame interval */ 1789 priv->frame_interval[i].numerator = 1; 1790 priv->frame_interval[i].denominator = 30; 1791 } 1792 1793 /* disable frame skipping */ 1794 priv->skip = &csi_skip[0]; 1795 1796 /* init default crop and compose rectangle sizes */ 1797 priv->crop.width = IMX_MEDIA_DEF_PIX_WIDTH; 1798 priv->crop.height = IMX_MEDIA_DEF_PIX_HEIGHT; 1799 priv->compose.width = IMX_MEDIA_DEF_PIX_WIDTH; 1800 priv->compose.height = IMX_MEDIA_DEF_PIX_HEIGHT; 1801 1802 priv->fim = imx_media_fim_init(&priv->sd); 1803 if (IS_ERR(priv->fim)) { 1804 ret = PTR_ERR(priv->fim); 1805 goto put_csi; 1806 } 1807 1808 priv->vdev = imx_media_capture_device_init(priv->sd.dev, &priv->sd, 1809 CSI_SRC_PAD_IDMAC, true); 1810 if (IS_ERR(priv->vdev)) { 1811 ret = PTR_ERR(priv->vdev); 1812 goto free_fim; 1813 } 1814 1815 ret = imx_media_capture_device_register(priv->vdev, 0); 1816 if (ret) 1817 goto remove_vdev; 1818 1819 return 0; 1820 1821remove_vdev: 1822 imx_media_capture_device_remove(priv->vdev); 1823free_fim: 1824 if (priv->fim) 1825 imx_media_fim_free(priv->fim); 1826put_csi: 1827 ipu_csi_put(priv->csi); 1828 return ret; 1829} 1830 1831static void csi_unregistered(struct v4l2_subdev *sd) 1832{ 1833 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1834 1835 imx_media_capture_device_unregister(priv->vdev); 1836 imx_media_capture_device_remove(priv->vdev); 1837 1838 if (priv->fim) 1839 imx_media_fim_free(priv->fim); 1840 1841 if (priv->csi) 1842 ipu_csi_put(priv->csi); 1843} 1844 1845/* 1846 * The CSI has only one fwnode endpoint, at the sink pad. Verify the 1847 * endpoint belongs to us, and return CSI_SINK_PAD. 1848 */ 1849static int csi_get_fwnode_pad(struct media_entity *entity, 1850 struct fwnode_endpoint *endpoint) 1851{ 1852 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); 1853 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1854 struct fwnode_handle *csi_port = dev_fwnode(priv->dev); 1855 struct fwnode_handle *csi_ep; 1856 int ret; 1857 1858 csi_ep = fwnode_get_next_child_node(csi_port, NULL); 1859 1860 ret = endpoint->local_fwnode == csi_ep ? CSI_SINK_PAD : -ENXIO; 1861 1862 fwnode_handle_put(csi_ep); 1863 1864 return ret; 1865} 1866 1867static const struct media_entity_operations csi_entity_ops = { 1868 .link_setup = csi_link_setup, 1869 .link_validate = v4l2_subdev_link_validate, 1870 .get_fwnode_pad = csi_get_fwnode_pad, 1871}; 1872 1873static const struct v4l2_subdev_core_ops csi_core_ops = { 1874 .subscribe_event = csi_subscribe_event, 1875 .unsubscribe_event = csi_unsubscribe_event, 1876}; 1877 1878static const struct v4l2_subdev_video_ops csi_video_ops = { 1879 .s_stream = csi_s_stream, 1880}; 1881 1882static const struct v4l2_subdev_pad_ops csi_pad_ops = { 1883 .enum_mbus_code = csi_enum_mbus_code, 1884 .enum_frame_size = csi_enum_frame_size, 1885 .enum_frame_interval = csi_enum_frame_interval, 1886 .get_fmt = csi_get_fmt, 1887 .set_fmt = csi_set_fmt, 1888 .get_selection = csi_get_selection, 1889 .set_selection = csi_set_selection, 1890 .get_frame_interval = csi_get_frame_interval, 1891 .set_frame_interval = csi_set_frame_interval, 1892 .link_validate = csi_link_validate, 1893}; 1894 1895static const struct v4l2_subdev_ops csi_subdev_ops = { 1896 .core = &csi_core_ops, 1897 .video = &csi_video_ops, 1898 .pad = &csi_pad_ops, 1899}; 1900 1901static const struct v4l2_subdev_internal_ops csi_internal_ops = { 1902 .init_state = imx_media_init_state, 1903 .registered = csi_registered, 1904 .unregistered = csi_unregistered, 1905}; 1906 1907static int imx_csi_notify_bound(struct v4l2_async_notifier *notifier, 1908 struct v4l2_subdev *sd, 1909 struct v4l2_async_connection *asd) 1910{ 1911 struct csi_priv *priv = notifier_to_dev(notifier); 1912 struct media_pad *sink = &priv->sd.entity.pads[CSI_SINK_PAD]; 1913 1914 /* 1915 * If the subdev is a video mux, it must be one of the CSI 1916 * muxes. Mark it as such via its group id. 1917 */ 1918 if (sd->entity.function == MEDIA_ENT_F_VID_MUX) 1919 sd->grp_id = IMX_MEDIA_GRP_ID_CSI_MUX; 1920 1921 return v4l2_create_fwnode_links_to_pad(sd, sink, 0); 1922} 1923 1924static const struct v4l2_async_notifier_operations csi_notify_ops = { 1925 .bound = imx_csi_notify_bound, 1926}; 1927 1928static int imx_csi_async_register(struct csi_priv *priv) 1929{ 1930 struct v4l2_async_connection *asd = NULL; 1931 struct fwnode_handle *ep; 1932 unsigned int port; 1933 int ret; 1934 1935 v4l2_async_subdev_nf_init(&priv->notifier, &priv->sd); 1936 1937 /* get this CSI's port id */ 1938 ret = fwnode_property_read_u32(dev_fwnode(priv->dev), "reg", &port); 1939 if (ret < 0) 1940 return ret; 1941 1942 ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(priv->dev->parent), 1943 port, 0, 1944 FWNODE_GRAPH_ENDPOINT_NEXT); 1945 if (ep) { 1946 asd = v4l2_async_nf_add_fwnode_remote(&priv->notifier, ep, 1947 struct v4l2_async_connection); 1948 1949 fwnode_handle_put(ep); 1950 1951 if (IS_ERR(asd)) { 1952 ret = PTR_ERR(asd); 1953 /* OK if asd already exists */ 1954 if (ret != -EEXIST) 1955 return ret; 1956 } 1957 } 1958 1959 priv->notifier.ops = &csi_notify_ops; 1960 1961 ret = v4l2_async_nf_register(&priv->notifier); 1962 if (ret) 1963 return ret; 1964 1965 return v4l2_async_register_subdev(&priv->sd); 1966} 1967 1968static int imx_csi_probe(struct platform_device *pdev) 1969{ 1970 struct ipu_client_platformdata *pdata; 1971 struct pinctrl *pinctrl; 1972 struct csi_priv *priv; 1973 int i, ret; 1974 1975 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 1976 if (!priv) 1977 return -ENOMEM; 1978 1979 platform_set_drvdata(pdev, &priv->sd); 1980 priv->dev = &pdev->dev; 1981 1982 ret = dma_set_coherent_mask(priv->dev, DMA_BIT_MASK(32)); 1983 if (ret) 1984 return ret; 1985 1986 /* get parent IPU */ 1987 priv->ipu = dev_get_drvdata(priv->dev->parent); 1988 1989 /* get our CSI id */ 1990 pdata = priv->dev->platform_data; 1991 priv->csi_id = pdata->csi; 1992 priv->smfc_id = (priv->csi_id == 0) ? 0 : 2; 1993 1994 priv->active_output_pad = CSI_SRC_PAD_IDMAC; 1995 1996 timer_setup(&priv->eof_timeout_timer, csi_idmac_eof_timeout, 0); 1997 spin_lock_init(&priv->irqlock); 1998 1999 v4l2_subdev_init(&priv->sd, &csi_subdev_ops); 2000 v4l2_set_subdevdata(&priv->sd, priv); 2001 priv->sd.internal_ops = &csi_internal_ops; 2002 priv->sd.entity.ops = &csi_entity_ops; 2003 priv->sd.entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER; 2004 priv->sd.dev = &pdev->dev; 2005 priv->sd.fwnode = of_fwnode_handle(pdata->of_node); 2006 priv->sd.owner = THIS_MODULE; 2007 priv->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; 2008 priv->sd.grp_id = priv->csi_id ? 2009 IMX_MEDIA_GRP_ID_IPU_CSI1 : IMX_MEDIA_GRP_ID_IPU_CSI0; 2010 imx_media_grp_id_to_sd_name(priv->sd.name, sizeof(priv->sd.name), 2011 priv->sd.grp_id, ipu_get_num(priv->ipu)); 2012 2013 for (i = 0; i < CSI_NUM_PADS; i++) 2014 priv->pad[i].flags = (i == CSI_SINK_PAD) ? 2015 MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE; 2016 2017 ret = media_entity_pads_init(&priv->sd.entity, CSI_NUM_PADS, 2018 priv->pad); 2019 if (ret) 2020 return ret; 2021 2022 mutex_init(&priv->lock); 2023 2024 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0); 2025 priv->sd.ctrl_handler = &priv->ctrl_hdlr; 2026 2027 /* 2028 * The IPUv3 driver did not assign an of_node to this 2029 * device. As a result, pinctrl does not automatically 2030 * configure our pin groups, so we need to do that manually 2031 * here, after setting this device's of_node. 2032 */ 2033 priv->dev->of_node = pdata->of_node; 2034 pinctrl = devm_pinctrl_get_select_default(priv->dev); 2035 if (IS_ERR(pinctrl)) { 2036 ret = PTR_ERR(pinctrl); 2037 dev_dbg(priv->dev, 2038 "devm_pinctrl_get_select_default() failed: %d\n", ret); 2039 if (ret != -ENODEV) 2040 goto free; 2041 } 2042 2043 ret = imx_csi_async_register(priv); 2044 if (ret) 2045 goto cleanup; 2046 2047 return 0; 2048 2049cleanup: 2050 v4l2_async_nf_unregister(&priv->notifier); 2051 v4l2_async_nf_cleanup(&priv->notifier); 2052free: 2053 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 2054 mutex_destroy(&priv->lock); 2055 return ret; 2056} 2057 2058static void imx_csi_remove(struct platform_device *pdev) 2059{ 2060 struct v4l2_subdev *sd = platform_get_drvdata(pdev); 2061 struct csi_priv *priv = sd_to_dev(sd); 2062 2063 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 2064 mutex_destroy(&priv->lock); 2065 v4l2_async_nf_unregister(&priv->notifier); 2066 v4l2_async_nf_cleanup(&priv->notifier); 2067 v4l2_async_unregister_subdev(sd); 2068 media_entity_cleanup(&sd->entity); 2069} 2070 2071static const struct platform_device_id imx_csi_ids[] = { 2072 { .name = "imx-ipuv3-csi" }, 2073 { }, 2074}; 2075MODULE_DEVICE_TABLE(platform, imx_csi_ids); 2076 2077static struct platform_driver imx_csi_driver = { 2078 .probe = imx_csi_probe, 2079 .remove_new = imx_csi_remove, 2080 .id_table = imx_csi_ids, 2081 .driver = { 2082 .name = "imx-ipuv3-csi", 2083 }, 2084}; 2085module_platform_driver(imx_csi_driver); 2086 2087MODULE_DESCRIPTION("i.MX CSI subdev driver"); 2088MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>"); 2089MODULE_LICENSE("GPL"); 2090