1 /* 2 * V4L2 Capture CSI Subdev for Freescale i.MX5/6 SOC 3 * 4 * Copyright (c) 2014-2017 Mentor Graphics Inc. 5 * Copyright (C) 2017 Pengutronix, Philipp Zabel <kernel@pengutronix.de> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 */ 12 #include <linux/delay.h> 13 #include <linux/gcd.h> 14 #include <linux/interrupt.h> 15 #include <linux/module.h> 16 #include <linux/of_graph.h> 17 #include <linux/pinctrl/consumer.h> 18 #include <linux/platform_device.h> 19 #include <media/v4l2-ctrls.h> 20 #include <media/v4l2-device.h> 21 #include <media/v4l2-event.h> 22 #include <media/v4l2-fwnode.h> 23 #include <media/v4l2-mc.h> 24 #include <media/v4l2-subdev.h> 25 #include <media/videobuf2-dma-contig.h> 26 #include <video/imx-ipu-v3.h> 27 #include <media/imx.h> 28 #include "imx-media.h" 29 30 /* 31 * Min/Max supported width and heights. 32 * 33 * We allow planar output, so we have to align width by 16 pixels 34 * to meet IDMAC alignment requirements. 35 * 36 * TODO: move this into pad format negotiation, if capture device 37 * has not requested planar formats, we should allow 8 pixel 38 * alignment. 39 */ 40 #define MIN_W 176 41 #define MIN_H 144 42 #define MAX_W 4096 43 #define MAX_H 4096 44 #define W_ALIGN 4 /* multiple of 16 pixels */ 45 #define H_ALIGN 1 /* multiple of 2 lines */ 46 #define S_ALIGN 1 /* multiple of 2 */ 47 48 /* 49 * struct csi_skip_desc - CSI frame skipping descriptor 50 * @keep - number of frames kept per max_ratio frames 51 * @max_ratio - width of skip_smfc, written to MAX_RATIO bitfield 52 * @skip_smfc - skip pattern written to the SKIP_SMFC bitfield 53 */ 54 struct csi_skip_desc { 55 u8 keep; 56 u8 max_ratio; 57 u8 skip_smfc; 58 }; 59 60 struct csi_priv { 61 struct device *dev; 62 struct ipu_soc *ipu; 63 struct imx_media_dev *md; 64 struct v4l2_subdev sd; 65 struct media_pad pad[CSI_NUM_PADS]; 66 /* the video device at IDMAC output pad */ 67 struct imx_media_video_dev *vdev; 68 struct imx_media_fim *fim; 69 int csi_id; 70 int smfc_id; 71 72 /* lock to protect all members below */ 73 struct mutex lock; 74 75 int active_output_pad; 76 77 struct ipuv3_channel *idmac_ch; 78 struct ipu_smfc *smfc; 79 struct ipu_csi *csi; 80 81 struct v4l2_mbus_framefmt format_mbus[CSI_NUM_PADS]; 82 const struct imx_media_pixfmt *cc[CSI_NUM_PADS]; 83 struct v4l2_fract frame_interval[CSI_NUM_PADS]; 84 struct v4l2_rect crop; 85 struct v4l2_rect compose; 86 const struct csi_skip_desc *skip; 87 88 /* active vb2 buffers to send to video dev sink */ 89 struct imx_media_buffer *active_vb2_buf[2]; 90 struct imx_media_dma_buf underrun_buf; 91 92 int ipu_buf_num; /* ipu double buffer index: 0-1 */ 93 94 /* the sink for the captured frames */ 95 struct media_entity *sink; 96 enum ipu_csi_dest dest; 97 /* the source subdev */ 98 struct v4l2_subdev *src_sd; 99 100 /* the mipi virtual channel number at link validate */ 101 int vc_num; 102 103 /* the upstream endpoint CSI is receiving from */ 104 struct v4l2_fwnode_endpoint upstream_ep; 105 106 spinlock_t irqlock; /* protect eof_irq handler */ 107 struct timer_list eof_timeout_timer; 108 int eof_irq; 109 int nfb4eof_irq; 110 111 struct v4l2_ctrl_handler ctrl_hdlr; 112 113 int stream_count; /* streaming counter */ 114 u32 frame_sequence; /* frame sequence counter */ 115 bool last_eof; /* waiting for last EOF at stream off */ 116 bool nfb4eof; /* NFB4EOF encountered during streaming */ 117 struct completion last_eof_comp; 118 }; 119 120 static inline struct csi_priv *sd_to_dev(struct v4l2_subdev *sdev) 121 { 122 return container_of(sdev, struct csi_priv, sd); 123 } 124 125 static inline bool is_parallel_bus(struct v4l2_fwnode_endpoint *ep) 126 { 127 return ep->bus_type != V4L2_MBUS_CSI2_DPHY; 128 } 129 130 static inline bool is_parallel_16bit_bus(struct v4l2_fwnode_endpoint *ep) 131 { 132 return is_parallel_bus(ep) && ep->bus.parallel.bus_width >= 16; 133 } 134 135 /* 136 * Check for conditions that require the IPU to handle the 137 * data internally as generic data, aka passthrough mode: 138 * - raw bayer media bus formats, or 139 * - the CSI is receiving from a 16-bit parallel bus, or 140 * - the CSI is receiving from an 8-bit parallel bus and the incoming 141 * media bus format is other than UYVY8_2X8/YUYV8_2X8. 142 */ 143 static inline bool requires_passthrough(struct v4l2_fwnode_endpoint *ep, 144 struct v4l2_mbus_framefmt *infmt, 145 const struct imx_media_pixfmt *incc) 146 { 147 return incc->bayer || is_parallel_16bit_bus(ep) || 148 (is_parallel_bus(ep) && 149 infmt->code != MEDIA_BUS_FMT_UYVY8_2X8 && 150 infmt->code != MEDIA_BUS_FMT_YUYV8_2X8); 151 } 152 153 /* 154 * Parses the fwnode endpoint from the source pad of the entity 155 * connected to this CSI. This will either be the entity directly 156 * upstream from the CSI-2 receiver, or directly upstream from the 157 * video mux. The endpoint is needed to determine the bus type and 158 * bus config coming into the CSI. 159 */ 160 static int csi_get_upstream_endpoint(struct csi_priv *priv, 161 struct v4l2_fwnode_endpoint *ep) 162 { 163 struct device_node *endpoint, *port; 164 struct media_entity *src; 165 struct v4l2_subdev *sd; 166 struct media_pad *pad; 167 168 if (!IS_ENABLED(CONFIG_OF)) 169 return -ENXIO; 170 171 if (!priv->src_sd) 172 return -EPIPE; 173 174 src = &priv->src_sd->entity; 175 176 if (src->function == MEDIA_ENT_F_VID_MUX) { 177 /* 178 * CSI is connected directly to video mux, skip up to 179 * CSI-2 receiver if it is in the path, otherwise stay 180 * with video mux. 181 */ 182 sd = imx_media_find_upstream_subdev(priv->md, src, 183 IMX_MEDIA_GRP_ID_CSI2); 184 if (!IS_ERR(sd)) 185 src = &sd->entity; 186 } 187 188 /* get source pad of entity directly upstream from src */ 189 pad = imx_media_find_upstream_pad(priv->md, src, 0); 190 if (IS_ERR(pad)) 191 return PTR_ERR(pad); 192 193 sd = media_entity_to_v4l2_subdev(pad->entity); 194 195 /* 196 * NOTE: this assumes an OF-graph port id is the same as a 197 * media pad index. 198 */ 199 port = of_graph_get_port_by_id(sd->dev->of_node, pad->index); 200 if (!port) 201 return -ENODEV; 202 203 endpoint = of_get_next_child(port, NULL); 204 of_node_put(port); 205 if (!endpoint) 206 return -ENODEV; 207 208 v4l2_fwnode_endpoint_parse(of_fwnode_handle(endpoint), ep); 209 of_node_put(endpoint); 210 211 return 0; 212 } 213 214 static void csi_idmac_put_ipu_resources(struct csi_priv *priv) 215 { 216 if (priv->idmac_ch) 217 ipu_idmac_put(priv->idmac_ch); 218 priv->idmac_ch = NULL; 219 220 if (priv->smfc) 221 ipu_smfc_put(priv->smfc); 222 priv->smfc = NULL; 223 } 224 225 static int csi_idmac_get_ipu_resources(struct csi_priv *priv) 226 { 227 int ch_num, ret; 228 struct ipu_smfc *smfc; 229 struct ipuv3_channel *idmac_ch; 230 231 ch_num = IPUV3_CHANNEL_CSI0 + priv->smfc_id; 232 233 smfc = ipu_smfc_get(priv->ipu, ch_num); 234 if (IS_ERR(smfc)) { 235 v4l2_err(&priv->sd, "failed to get SMFC\n"); 236 ret = PTR_ERR(smfc); 237 goto out; 238 } 239 priv->smfc = smfc; 240 241 idmac_ch = ipu_idmac_get(priv->ipu, ch_num); 242 if (IS_ERR(idmac_ch)) { 243 v4l2_err(&priv->sd, "could not get IDMAC channel %u\n", 244 ch_num); 245 ret = PTR_ERR(idmac_ch); 246 goto out; 247 } 248 priv->idmac_ch = idmac_ch; 249 250 return 0; 251 out: 252 csi_idmac_put_ipu_resources(priv); 253 return ret; 254 } 255 256 static void csi_vb2_buf_done(struct csi_priv *priv) 257 { 258 struct imx_media_video_dev *vdev = priv->vdev; 259 struct imx_media_buffer *done, *next; 260 struct vb2_buffer *vb; 261 dma_addr_t phys; 262 263 done = priv->active_vb2_buf[priv->ipu_buf_num]; 264 if (done) { 265 done->vbuf.field = vdev->fmt.fmt.pix.field; 266 done->vbuf.sequence = priv->frame_sequence; 267 vb = &done->vbuf.vb2_buf; 268 vb->timestamp = ktime_get_ns(); 269 vb2_buffer_done(vb, priv->nfb4eof ? 270 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); 271 } 272 273 priv->frame_sequence++; 274 priv->nfb4eof = false; 275 276 /* get next queued buffer */ 277 next = imx_media_capture_device_next_buf(vdev); 278 if (next) { 279 phys = vb2_dma_contig_plane_dma_addr(&next->vbuf.vb2_buf, 0); 280 priv->active_vb2_buf[priv->ipu_buf_num] = next; 281 } else { 282 phys = priv->underrun_buf.phys; 283 priv->active_vb2_buf[priv->ipu_buf_num] = NULL; 284 } 285 286 if (ipu_idmac_buffer_is_ready(priv->idmac_ch, priv->ipu_buf_num)) 287 ipu_idmac_clear_buffer(priv->idmac_ch, priv->ipu_buf_num); 288 289 ipu_cpmem_set_buffer(priv->idmac_ch, priv->ipu_buf_num, phys); 290 } 291 292 static irqreturn_t csi_idmac_eof_interrupt(int irq, void *dev_id) 293 { 294 struct csi_priv *priv = dev_id; 295 296 spin_lock(&priv->irqlock); 297 298 if (priv->last_eof) { 299 complete(&priv->last_eof_comp); 300 priv->last_eof = false; 301 goto unlock; 302 } 303 304 if (priv->fim) 305 /* call frame interval monitor */ 306 imx_media_fim_eof_monitor(priv->fim, ktime_get()); 307 308 csi_vb2_buf_done(priv); 309 310 /* select new IPU buf */ 311 ipu_idmac_select_buffer(priv->idmac_ch, priv->ipu_buf_num); 312 /* toggle IPU double-buffer index */ 313 priv->ipu_buf_num ^= 1; 314 315 /* bump the EOF timeout timer */ 316 mod_timer(&priv->eof_timeout_timer, 317 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT)); 318 319 unlock: 320 spin_unlock(&priv->irqlock); 321 return IRQ_HANDLED; 322 } 323 324 static irqreturn_t csi_idmac_nfb4eof_interrupt(int irq, void *dev_id) 325 { 326 struct csi_priv *priv = dev_id; 327 328 spin_lock(&priv->irqlock); 329 330 /* 331 * this is not an unrecoverable error, just mark 332 * the next captured frame with vb2 error flag. 333 */ 334 priv->nfb4eof = true; 335 336 v4l2_err(&priv->sd, "NFB4EOF\n"); 337 338 spin_unlock(&priv->irqlock); 339 340 return IRQ_HANDLED; 341 } 342 343 /* 344 * EOF timeout timer function. This is an unrecoverable condition 345 * without a stream restart. 346 */ 347 static void csi_idmac_eof_timeout(struct timer_list *t) 348 { 349 struct csi_priv *priv = from_timer(priv, t, eof_timeout_timer); 350 struct imx_media_video_dev *vdev = priv->vdev; 351 352 v4l2_err(&priv->sd, "EOF timeout\n"); 353 354 /* signal a fatal error to capture device */ 355 imx_media_capture_device_error(vdev); 356 } 357 358 static void csi_idmac_setup_vb2_buf(struct csi_priv *priv, dma_addr_t *phys) 359 { 360 struct imx_media_video_dev *vdev = priv->vdev; 361 struct imx_media_buffer *buf; 362 int i; 363 364 for (i = 0; i < 2; i++) { 365 buf = imx_media_capture_device_next_buf(vdev); 366 if (buf) { 367 priv->active_vb2_buf[i] = buf; 368 phys[i] = vb2_dma_contig_plane_dma_addr( 369 &buf->vbuf.vb2_buf, 0); 370 } else { 371 priv->active_vb2_buf[i] = NULL; 372 phys[i] = priv->underrun_buf.phys; 373 } 374 } 375 } 376 377 static void csi_idmac_unsetup_vb2_buf(struct csi_priv *priv, 378 enum vb2_buffer_state return_status) 379 { 380 struct imx_media_buffer *buf; 381 int i; 382 383 /* return any remaining active frames with return_status */ 384 for (i = 0; i < 2; i++) { 385 buf = priv->active_vb2_buf[i]; 386 if (buf) { 387 struct vb2_buffer *vb = &buf->vbuf.vb2_buf; 388 389 vb->timestamp = ktime_get_ns(); 390 vb2_buffer_done(vb, return_status); 391 } 392 } 393 } 394 395 /* init the SMFC IDMAC channel */ 396 static int csi_idmac_setup_channel(struct csi_priv *priv) 397 { 398 struct imx_media_video_dev *vdev = priv->vdev; 399 const struct imx_media_pixfmt *incc; 400 struct v4l2_mbus_framefmt *infmt; 401 struct ipu_image image; 402 u32 passthrough_bits; 403 u32 passthrough_cycles; 404 dma_addr_t phys[2]; 405 bool passthrough; 406 u32 burst_size; 407 int ret; 408 409 infmt = &priv->format_mbus[CSI_SINK_PAD]; 410 incc = priv->cc[CSI_SINK_PAD]; 411 412 ipu_cpmem_zero(priv->idmac_ch); 413 414 memset(&image, 0, sizeof(image)); 415 image.pix = vdev->fmt.fmt.pix; 416 image.rect.width = image.pix.width; 417 image.rect.height = image.pix.height; 418 419 csi_idmac_setup_vb2_buf(priv, phys); 420 421 image.phys0 = phys[0]; 422 image.phys1 = phys[1]; 423 424 passthrough = requires_passthrough(&priv->upstream_ep, infmt, incc); 425 passthrough_cycles = 1; 426 427 switch (image.pix.pixelformat) { 428 case V4L2_PIX_FMT_SBGGR8: 429 case V4L2_PIX_FMT_SGBRG8: 430 case V4L2_PIX_FMT_SGRBG8: 431 case V4L2_PIX_FMT_SRGGB8: 432 case V4L2_PIX_FMT_GREY: 433 burst_size = 16; 434 passthrough_bits = 8; 435 break; 436 case V4L2_PIX_FMT_SBGGR16: 437 case V4L2_PIX_FMT_SGBRG16: 438 case V4L2_PIX_FMT_SGRBG16: 439 case V4L2_PIX_FMT_SRGGB16: 440 case V4L2_PIX_FMT_Y16: 441 burst_size = 8; 442 passthrough_bits = 16; 443 break; 444 case V4L2_PIX_FMT_YUV420: 445 case V4L2_PIX_FMT_NV12: 446 burst_size = (image.pix.width & 0x3f) ? 447 ((image.pix.width & 0x1f) ? 448 ((image.pix.width & 0xf) ? 8 : 16) : 32) : 64; 449 passthrough_bits = 16; 450 /* Skip writing U and V components to odd rows */ 451 ipu_cpmem_skip_odd_chroma_rows(priv->idmac_ch); 452 break; 453 case V4L2_PIX_FMT_YUYV: 454 case V4L2_PIX_FMT_UYVY: 455 burst_size = (image.pix.width & 0x1f) ? 456 ((image.pix.width & 0xf) ? 8 : 16) : 32; 457 passthrough_bits = 16; 458 break; 459 case V4L2_PIX_FMT_RGB565: 460 if (passthrough) { 461 burst_size = 16; 462 passthrough_bits = 8; 463 passthrough_cycles = incc->cycles; 464 break; 465 } 466 /* fallthrough - non-passthrough RGB565 (CSI-2 bus) */ 467 default: 468 burst_size = (image.pix.width & 0xf) ? 8 : 16; 469 passthrough_bits = 16; 470 break; 471 } 472 473 if (passthrough) { 474 ipu_cpmem_set_resolution(priv->idmac_ch, 475 image.rect.width * passthrough_cycles, 476 image.rect.height); 477 ipu_cpmem_set_stride(priv->idmac_ch, image.pix.bytesperline); 478 ipu_cpmem_set_buffer(priv->idmac_ch, 0, image.phys0); 479 ipu_cpmem_set_buffer(priv->idmac_ch, 1, image.phys1); 480 ipu_cpmem_set_format_passthrough(priv->idmac_ch, 481 passthrough_bits); 482 } else { 483 ret = ipu_cpmem_set_image(priv->idmac_ch, &image); 484 if (ret) 485 goto unsetup_vb2; 486 } 487 488 ipu_cpmem_set_burstsize(priv->idmac_ch, burst_size); 489 490 /* 491 * Set the channel for the direct CSI-->memory via SMFC 492 * use-case to very high priority, by enabling the watermark 493 * signal in the SMFC, enabling WM in the channel, and setting 494 * the channel priority to high. 495 * 496 * Refer to the i.mx6 rev. D TRM Table 36-8: Calculated priority 497 * value. 498 * 499 * The WM's are set very low by intention here to ensure that 500 * the SMFC FIFOs do not overflow. 501 */ 502 ipu_smfc_set_watermark(priv->smfc, 0x02, 0x01); 503 ipu_cpmem_set_high_priority(priv->idmac_ch); 504 ipu_idmac_enable_watermark(priv->idmac_ch, true); 505 ipu_cpmem_set_axi_id(priv->idmac_ch, 0); 506 507 burst_size = passthrough ? 508 (burst_size >> 3) - 1 : (burst_size >> 2) - 1; 509 510 ipu_smfc_set_burstsize(priv->smfc, burst_size); 511 512 if (image.pix.field == V4L2_FIELD_NONE && 513 V4L2_FIELD_HAS_BOTH(infmt->field)) 514 ipu_cpmem_interlaced_scan(priv->idmac_ch, 515 image.pix.bytesperline); 516 517 ipu_idmac_set_double_buffer(priv->idmac_ch, true); 518 519 return 0; 520 521 unsetup_vb2: 522 csi_idmac_unsetup_vb2_buf(priv, VB2_BUF_STATE_QUEUED); 523 return ret; 524 } 525 526 static void csi_idmac_unsetup(struct csi_priv *priv, 527 enum vb2_buffer_state state) 528 { 529 ipu_idmac_disable_channel(priv->idmac_ch); 530 ipu_smfc_disable(priv->smfc); 531 532 csi_idmac_unsetup_vb2_buf(priv, state); 533 } 534 535 static int csi_idmac_setup(struct csi_priv *priv) 536 { 537 int ret; 538 539 ret = csi_idmac_setup_channel(priv); 540 if (ret) 541 return ret; 542 543 ipu_cpmem_dump(priv->idmac_ch); 544 ipu_dump(priv->ipu); 545 546 ipu_smfc_enable(priv->smfc); 547 548 /* set buffers ready */ 549 ipu_idmac_select_buffer(priv->idmac_ch, 0); 550 ipu_idmac_select_buffer(priv->idmac_ch, 1); 551 552 /* enable the channels */ 553 ipu_idmac_enable_channel(priv->idmac_ch); 554 555 return 0; 556 } 557 558 static int csi_idmac_start(struct csi_priv *priv) 559 { 560 struct imx_media_video_dev *vdev = priv->vdev; 561 struct v4l2_pix_format *outfmt; 562 int ret; 563 564 ret = csi_idmac_get_ipu_resources(priv); 565 if (ret) 566 return ret; 567 568 ipu_smfc_map_channel(priv->smfc, priv->csi_id, priv->vc_num); 569 570 outfmt = &vdev->fmt.fmt.pix; 571 572 ret = imx_media_alloc_dma_buf(priv->md, &priv->underrun_buf, 573 outfmt->sizeimage); 574 if (ret) 575 goto out_put_ipu; 576 577 priv->ipu_buf_num = 0; 578 579 /* init EOF completion waitq */ 580 init_completion(&priv->last_eof_comp); 581 priv->frame_sequence = 0; 582 priv->last_eof = false; 583 priv->nfb4eof = false; 584 585 ret = csi_idmac_setup(priv); 586 if (ret) { 587 v4l2_err(&priv->sd, "csi_idmac_setup failed: %d\n", ret); 588 goto out_free_dma_buf; 589 } 590 591 priv->nfb4eof_irq = ipu_idmac_channel_irq(priv->ipu, 592 priv->idmac_ch, 593 IPU_IRQ_NFB4EOF); 594 ret = devm_request_irq(priv->dev, priv->nfb4eof_irq, 595 csi_idmac_nfb4eof_interrupt, 0, 596 "imx-smfc-nfb4eof", priv); 597 if (ret) { 598 v4l2_err(&priv->sd, 599 "Error registering NFB4EOF irq: %d\n", ret); 600 goto out_unsetup; 601 } 602 603 priv->eof_irq = ipu_idmac_channel_irq(priv->ipu, priv->idmac_ch, 604 IPU_IRQ_EOF); 605 606 ret = devm_request_irq(priv->dev, priv->eof_irq, 607 csi_idmac_eof_interrupt, 0, 608 "imx-smfc-eof", priv); 609 if (ret) { 610 v4l2_err(&priv->sd, 611 "Error registering eof irq: %d\n", ret); 612 goto out_free_nfb4eof_irq; 613 } 614 615 /* start the EOF timeout timer */ 616 mod_timer(&priv->eof_timeout_timer, 617 jiffies + msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT)); 618 619 return 0; 620 621 out_free_nfb4eof_irq: 622 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv); 623 out_unsetup: 624 csi_idmac_unsetup(priv, VB2_BUF_STATE_QUEUED); 625 out_free_dma_buf: 626 imx_media_free_dma_buf(priv->md, &priv->underrun_buf); 627 out_put_ipu: 628 csi_idmac_put_ipu_resources(priv); 629 return ret; 630 } 631 632 static void csi_idmac_stop(struct csi_priv *priv) 633 { 634 unsigned long flags; 635 int ret; 636 637 /* mark next EOF interrupt as the last before stream off */ 638 spin_lock_irqsave(&priv->irqlock, flags); 639 priv->last_eof = true; 640 spin_unlock_irqrestore(&priv->irqlock, flags); 641 642 /* 643 * and then wait for interrupt handler to mark completion. 644 */ 645 ret = wait_for_completion_timeout( 646 &priv->last_eof_comp, msecs_to_jiffies(IMX_MEDIA_EOF_TIMEOUT)); 647 if (ret == 0) 648 v4l2_warn(&priv->sd, "wait last EOF timeout\n"); 649 650 devm_free_irq(priv->dev, priv->eof_irq, priv); 651 devm_free_irq(priv->dev, priv->nfb4eof_irq, priv); 652 653 csi_idmac_unsetup(priv, VB2_BUF_STATE_ERROR); 654 655 imx_media_free_dma_buf(priv->md, &priv->underrun_buf); 656 657 /* cancel the EOF timeout timer */ 658 del_timer_sync(&priv->eof_timeout_timer); 659 660 csi_idmac_put_ipu_resources(priv); 661 } 662 663 /* Update the CSI whole sensor and active windows */ 664 static int csi_setup(struct csi_priv *priv) 665 { 666 struct v4l2_mbus_framefmt *infmt, *outfmt; 667 const struct imx_media_pixfmt *incc; 668 struct v4l2_mbus_config mbus_cfg; 669 struct v4l2_mbus_framefmt if_fmt; 670 struct v4l2_rect crop; 671 672 infmt = &priv->format_mbus[CSI_SINK_PAD]; 673 incc = priv->cc[CSI_SINK_PAD]; 674 outfmt = &priv->format_mbus[priv->active_output_pad]; 675 676 /* compose mbus_config from the upstream endpoint */ 677 mbus_cfg.type = priv->upstream_ep.bus_type; 678 mbus_cfg.flags = is_parallel_bus(&priv->upstream_ep) ? 679 priv->upstream_ep.bus.parallel.flags : 680 priv->upstream_ep.bus.mipi_csi2.flags; 681 682 /* 683 * we need to pass input frame to CSI interface, but 684 * with translated field type from output format 685 */ 686 if_fmt = *infmt; 687 if_fmt.field = outfmt->field; 688 crop = priv->crop; 689 690 /* 691 * if cycles is set, we need to handle this over multiple cycles as 692 * generic/bayer data 693 */ 694 if (is_parallel_bus(&priv->upstream_ep) && incc->cycles) { 695 if_fmt.width *= incc->cycles; 696 crop.width *= incc->cycles; 697 } 698 699 ipu_csi_set_window(priv->csi, &crop); 700 701 ipu_csi_set_downsize(priv->csi, 702 priv->crop.width == 2 * priv->compose.width, 703 priv->crop.height == 2 * priv->compose.height); 704 705 ipu_csi_init_interface(priv->csi, &mbus_cfg, &if_fmt); 706 707 ipu_csi_set_dest(priv->csi, priv->dest); 708 709 if (priv->dest == IPU_CSI_DEST_IDMAC) 710 ipu_csi_set_skip_smfc(priv->csi, priv->skip->skip_smfc, 711 priv->skip->max_ratio - 1, 0); 712 713 ipu_csi_dump(priv->csi); 714 715 return 0; 716 } 717 718 static int csi_start(struct csi_priv *priv) 719 { 720 struct v4l2_fract *output_fi; 721 int ret; 722 723 output_fi = &priv->frame_interval[priv->active_output_pad]; 724 725 if (priv->dest == IPU_CSI_DEST_IDMAC) { 726 ret = csi_idmac_start(priv); 727 if (ret) 728 return ret; 729 } 730 731 ret = csi_setup(priv); 732 if (ret) 733 goto idmac_stop; 734 735 /* start the frame interval monitor */ 736 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC) { 737 ret = imx_media_fim_set_stream(priv->fim, output_fi, true); 738 if (ret) 739 goto idmac_stop; 740 } 741 742 ret = ipu_csi_enable(priv->csi); 743 if (ret) { 744 v4l2_err(&priv->sd, "CSI enable error: %d\n", ret); 745 goto fim_off; 746 } 747 748 return 0; 749 750 fim_off: 751 if (priv->fim && priv->dest == IPU_CSI_DEST_IDMAC) 752 imx_media_fim_set_stream(priv->fim, NULL, false); 753 idmac_stop: 754 if (priv->dest == IPU_CSI_DEST_IDMAC) 755 csi_idmac_stop(priv); 756 return ret; 757 } 758 759 static void csi_stop(struct csi_priv *priv) 760 { 761 if (priv->dest == IPU_CSI_DEST_IDMAC) { 762 csi_idmac_stop(priv); 763 764 /* stop the frame interval monitor */ 765 if (priv->fim) 766 imx_media_fim_set_stream(priv->fim, NULL, false); 767 } 768 769 ipu_csi_disable(priv->csi); 770 } 771 772 static const struct csi_skip_desc csi_skip[12] = { 773 { 1, 1, 0x00 }, /* Keep all frames */ 774 { 5, 6, 0x10 }, /* Skip every sixth frame */ 775 { 4, 5, 0x08 }, /* Skip every fifth frame */ 776 { 3, 4, 0x04 }, /* Skip every fourth frame */ 777 { 2, 3, 0x02 }, /* Skip every third frame */ 778 { 3, 5, 0x0a }, /* Skip frames 1 and 3 of every 5 */ 779 { 1, 2, 0x01 }, /* Skip every second frame */ 780 { 2, 5, 0x0b }, /* Keep frames 1 and 4 of every 5 */ 781 { 1, 3, 0x03 }, /* Keep one in three frames */ 782 { 1, 4, 0x07 }, /* Keep one in four frames */ 783 { 1, 5, 0x0f }, /* Keep one in five frames */ 784 { 1, 6, 0x1f }, /* Keep one in six frames */ 785 }; 786 787 static void csi_apply_skip_interval(const struct csi_skip_desc *skip, 788 struct v4l2_fract *interval) 789 { 790 unsigned int div; 791 792 interval->numerator *= skip->max_ratio; 793 interval->denominator *= skip->keep; 794 795 /* Reduce fraction to lowest terms */ 796 div = gcd(interval->numerator, interval->denominator); 797 if (div > 1) { 798 interval->numerator /= div; 799 interval->denominator /= div; 800 } 801 } 802 803 /* 804 * Find the skip pattern to produce the output frame interval closest to the 805 * requested one, for the given input frame interval. Updates the output frame 806 * interval to the exact value. 807 */ 808 static const struct csi_skip_desc *csi_find_best_skip(struct v4l2_fract *in, 809 struct v4l2_fract *out) 810 { 811 const struct csi_skip_desc *skip = &csi_skip[0], *best_skip = skip; 812 u32 min_err = UINT_MAX; 813 u64 want_us; 814 int i; 815 816 /* Default to 1:1 ratio */ 817 if (out->numerator == 0 || out->denominator == 0 || 818 in->numerator == 0 || in->denominator == 0) { 819 *out = *in; 820 return best_skip; 821 } 822 823 want_us = div_u64((u64)USEC_PER_SEC * out->numerator, out->denominator); 824 825 /* Find the reduction closest to the requested time per frame */ 826 for (i = 0; i < ARRAY_SIZE(csi_skip); i++, skip++) { 827 u64 tmp, err; 828 829 tmp = div_u64((u64)USEC_PER_SEC * in->numerator * 830 skip->max_ratio, in->denominator * skip->keep); 831 832 err = abs((s64)tmp - want_us); 833 if (err < min_err) { 834 min_err = err; 835 best_skip = skip; 836 } 837 } 838 839 *out = *in; 840 csi_apply_skip_interval(best_skip, out); 841 842 return best_skip; 843 } 844 845 /* 846 * V4L2 subdev operations. 847 */ 848 849 static int csi_g_frame_interval(struct v4l2_subdev *sd, 850 struct v4l2_subdev_frame_interval *fi) 851 { 852 struct csi_priv *priv = v4l2_get_subdevdata(sd); 853 854 if (fi->pad >= CSI_NUM_PADS) 855 return -EINVAL; 856 857 mutex_lock(&priv->lock); 858 859 fi->interval = priv->frame_interval[fi->pad]; 860 861 mutex_unlock(&priv->lock); 862 863 return 0; 864 } 865 866 static int csi_s_frame_interval(struct v4l2_subdev *sd, 867 struct v4l2_subdev_frame_interval *fi) 868 { 869 struct csi_priv *priv = v4l2_get_subdevdata(sd); 870 struct v4l2_fract *input_fi; 871 int ret = 0; 872 873 mutex_lock(&priv->lock); 874 875 input_fi = &priv->frame_interval[CSI_SINK_PAD]; 876 877 switch (fi->pad) { 878 case CSI_SINK_PAD: 879 /* No limits on input frame interval */ 880 /* Reset output intervals and frame skipping ratio to 1:1 */ 881 priv->frame_interval[CSI_SRC_PAD_IDMAC] = fi->interval; 882 priv->frame_interval[CSI_SRC_PAD_DIRECT] = fi->interval; 883 priv->skip = &csi_skip[0]; 884 break; 885 case CSI_SRC_PAD_IDMAC: 886 /* 887 * frame interval at IDMAC output pad depends on input 888 * interval, modified by frame skipping. 889 */ 890 priv->skip = csi_find_best_skip(input_fi, &fi->interval); 891 break; 892 case CSI_SRC_PAD_DIRECT: 893 /* 894 * frame interval at DIRECT output pad is same as input 895 * interval. 896 */ 897 fi->interval = *input_fi; 898 break; 899 default: 900 ret = -EINVAL; 901 goto out; 902 } 903 904 priv->frame_interval[fi->pad] = fi->interval; 905 out: 906 mutex_unlock(&priv->lock); 907 return ret; 908 } 909 910 static int csi_s_stream(struct v4l2_subdev *sd, int enable) 911 { 912 struct csi_priv *priv = v4l2_get_subdevdata(sd); 913 int ret = 0; 914 915 mutex_lock(&priv->lock); 916 917 if (!priv->src_sd || !priv->sink) { 918 ret = -EPIPE; 919 goto out; 920 } 921 922 /* 923 * enable/disable streaming only if stream_count is 924 * going from 0 to 1 / 1 to 0. 925 */ 926 if (priv->stream_count != !enable) 927 goto update_count; 928 929 if (enable) { 930 /* upstream must be started first, before starting CSI */ 931 ret = v4l2_subdev_call(priv->src_sd, video, s_stream, 1); 932 ret = (ret && ret != -ENOIOCTLCMD) ? ret : 0; 933 if (ret) 934 goto out; 935 936 dev_dbg(priv->dev, "stream ON\n"); 937 ret = csi_start(priv); 938 if (ret) { 939 v4l2_subdev_call(priv->src_sd, video, s_stream, 0); 940 goto out; 941 } 942 } else { 943 dev_dbg(priv->dev, "stream OFF\n"); 944 /* CSI must be stopped first, then stop upstream */ 945 csi_stop(priv); 946 v4l2_subdev_call(priv->src_sd, video, s_stream, 0); 947 } 948 949 update_count: 950 priv->stream_count += enable ? 1 : -1; 951 if (priv->stream_count < 0) 952 priv->stream_count = 0; 953 out: 954 mutex_unlock(&priv->lock); 955 return ret; 956 } 957 958 static int csi_link_setup(struct media_entity *entity, 959 const struct media_pad *local, 960 const struct media_pad *remote, u32 flags) 961 { 962 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); 963 struct csi_priv *priv = v4l2_get_subdevdata(sd); 964 struct v4l2_subdev *remote_sd; 965 int ret = 0; 966 967 dev_dbg(priv->dev, "link setup %s -> %s\n", remote->entity->name, 968 local->entity->name); 969 970 mutex_lock(&priv->lock); 971 972 if (local->flags & MEDIA_PAD_FL_SINK) { 973 if (!is_media_entity_v4l2_subdev(remote->entity)) { 974 ret = -EINVAL; 975 goto out; 976 } 977 978 remote_sd = media_entity_to_v4l2_subdev(remote->entity); 979 980 if (flags & MEDIA_LNK_FL_ENABLED) { 981 if (priv->src_sd) { 982 ret = -EBUSY; 983 goto out; 984 } 985 priv->src_sd = remote_sd; 986 } else { 987 priv->src_sd = NULL; 988 } 989 990 goto out; 991 } 992 993 /* this is a source pad */ 994 995 if (flags & MEDIA_LNK_FL_ENABLED) { 996 if (priv->sink) { 997 ret = -EBUSY; 998 goto out; 999 } 1000 } else { 1001 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 1002 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0); 1003 priv->sink = NULL; 1004 goto out; 1005 } 1006 1007 /* record which output pad is now active */ 1008 priv->active_output_pad = local->index; 1009 1010 /* set CSI destination */ 1011 if (local->index == CSI_SRC_PAD_IDMAC) { 1012 if (!is_media_entity_v4l2_video_device(remote->entity)) { 1013 ret = -EINVAL; 1014 goto out; 1015 } 1016 1017 if (priv->fim) { 1018 ret = imx_media_fim_add_controls(priv->fim); 1019 if (ret) 1020 goto out; 1021 } 1022 1023 priv->dest = IPU_CSI_DEST_IDMAC; 1024 } else { 1025 if (!is_media_entity_v4l2_subdev(remote->entity)) { 1026 ret = -EINVAL; 1027 goto out; 1028 } 1029 1030 remote_sd = media_entity_to_v4l2_subdev(remote->entity); 1031 switch (remote_sd->grp_id) { 1032 case IMX_MEDIA_GRP_ID_VDIC: 1033 priv->dest = IPU_CSI_DEST_VDIC; 1034 break; 1035 case IMX_MEDIA_GRP_ID_IC_PRP: 1036 priv->dest = IPU_CSI_DEST_IC; 1037 break; 1038 default: 1039 ret = -EINVAL; 1040 goto out; 1041 } 1042 } 1043 1044 priv->sink = remote->entity; 1045 out: 1046 mutex_unlock(&priv->lock); 1047 return ret; 1048 } 1049 1050 static int csi_link_validate(struct v4l2_subdev *sd, 1051 struct media_link *link, 1052 struct v4l2_subdev_format *source_fmt, 1053 struct v4l2_subdev_format *sink_fmt) 1054 { 1055 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1056 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1057 bool is_csi2; 1058 int ret; 1059 1060 ret = v4l2_subdev_link_validate_default(sd, link, 1061 source_fmt, sink_fmt); 1062 if (ret) 1063 return ret; 1064 1065 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1066 if (ret) { 1067 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1068 return ret; 1069 } 1070 1071 mutex_lock(&priv->lock); 1072 1073 priv->upstream_ep = upstream_ep; 1074 is_csi2 = !is_parallel_bus(&upstream_ep); 1075 if (is_csi2) { 1076 int vc_num = 0; 1077 /* 1078 * NOTE! It seems the virtual channels from the mipi csi-2 1079 * receiver are used only for routing by the video mux's, 1080 * or for hard-wired routing to the CSI's. Once the stream 1081 * enters the CSI's however, they are treated internally 1082 * in the IPU as virtual channel 0. 1083 */ 1084 #if 0 1085 mutex_unlock(&priv->lock); 1086 vc_num = imx_media_find_mipi_csi2_channel(priv->md, 1087 &priv->sd.entity); 1088 if (vc_num < 0) 1089 return vc_num; 1090 mutex_lock(&priv->lock); 1091 #endif 1092 ipu_csi_set_mipi_datatype(priv->csi, vc_num, 1093 &priv->format_mbus[CSI_SINK_PAD]); 1094 } 1095 1096 /* select either parallel or MIPI-CSI2 as input to CSI */ 1097 ipu_set_csi_src_mux(priv->ipu, priv->csi_id, is_csi2); 1098 1099 mutex_unlock(&priv->lock); 1100 return ret; 1101 } 1102 1103 static struct v4l2_mbus_framefmt * 1104 __csi_get_fmt(struct csi_priv *priv, struct v4l2_subdev_pad_config *cfg, 1105 unsigned int pad, enum v4l2_subdev_format_whence which) 1106 { 1107 if (which == V4L2_SUBDEV_FORMAT_TRY) 1108 return v4l2_subdev_get_try_format(&priv->sd, cfg, pad); 1109 else 1110 return &priv->format_mbus[pad]; 1111 } 1112 1113 static struct v4l2_rect * 1114 __csi_get_crop(struct csi_priv *priv, struct v4l2_subdev_pad_config *cfg, 1115 enum v4l2_subdev_format_whence which) 1116 { 1117 if (which == V4L2_SUBDEV_FORMAT_TRY) 1118 return v4l2_subdev_get_try_crop(&priv->sd, cfg, CSI_SINK_PAD); 1119 else 1120 return &priv->crop; 1121 } 1122 1123 static struct v4l2_rect * 1124 __csi_get_compose(struct csi_priv *priv, struct v4l2_subdev_pad_config *cfg, 1125 enum v4l2_subdev_format_whence which) 1126 { 1127 if (which == V4L2_SUBDEV_FORMAT_TRY) 1128 return v4l2_subdev_get_try_compose(&priv->sd, cfg, 1129 CSI_SINK_PAD); 1130 else 1131 return &priv->compose; 1132 } 1133 1134 static void csi_try_crop(struct csi_priv *priv, 1135 struct v4l2_rect *crop, 1136 struct v4l2_subdev_pad_config *cfg, 1137 struct v4l2_mbus_framefmt *infmt, 1138 struct v4l2_fwnode_endpoint *upstream_ep) 1139 { 1140 crop->width = min_t(__u32, infmt->width, crop->width); 1141 if (crop->left + crop->width > infmt->width) 1142 crop->left = infmt->width - crop->width; 1143 /* adjust crop left/width to h/w alignment restrictions */ 1144 crop->left &= ~0x3; 1145 crop->width &= ~0x7; 1146 1147 /* 1148 * FIXME: not sure why yet, but on interlaced bt.656, 1149 * changing the vertical cropping causes loss of vertical 1150 * sync, so fix it to NTSC/PAL active lines. NTSC contains 1151 * 2 extra lines of active video that need to be cropped. 1152 */ 1153 if (upstream_ep->bus_type == V4L2_MBUS_BT656 && 1154 (V4L2_FIELD_HAS_BOTH(infmt->field) || 1155 infmt->field == V4L2_FIELD_ALTERNATE)) { 1156 crop->height = infmt->height; 1157 crop->top = (infmt->height == 480) ? 2 : 0; 1158 } else { 1159 crop->height = min_t(__u32, infmt->height, crop->height); 1160 if (crop->top + crop->height > infmt->height) 1161 crop->top = infmt->height - crop->height; 1162 } 1163 } 1164 1165 static int csi_enum_mbus_code(struct v4l2_subdev *sd, 1166 struct v4l2_subdev_pad_config *cfg, 1167 struct v4l2_subdev_mbus_code_enum *code) 1168 { 1169 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1170 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1171 const struct imx_media_pixfmt *incc; 1172 struct v4l2_mbus_framefmt *infmt; 1173 int ret = 0; 1174 1175 mutex_lock(&priv->lock); 1176 1177 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, code->which); 1178 incc = imx_media_find_mbus_format(infmt->code, CS_SEL_ANY, true); 1179 1180 switch (code->pad) { 1181 case CSI_SINK_PAD: 1182 ret = imx_media_enum_mbus_format(&code->code, code->index, 1183 CS_SEL_ANY, true); 1184 break; 1185 case CSI_SRC_PAD_DIRECT: 1186 case CSI_SRC_PAD_IDMAC: 1187 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1188 if (ret) { 1189 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1190 goto out; 1191 } 1192 1193 if (requires_passthrough(&upstream_ep, infmt, incc)) { 1194 if (code->index != 0) { 1195 ret = -EINVAL; 1196 goto out; 1197 } 1198 code->code = infmt->code; 1199 } else { 1200 u32 cs_sel = (incc->cs == IPUV3_COLORSPACE_YUV) ? 1201 CS_SEL_YUV : CS_SEL_RGB; 1202 ret = imx_media_enum_ipu_format(&code->code, 1203 code->index, 1204 cs_sel); 1205 } 1206 break; 1207 default: 1208 ret = -EINVAL; 1209 } 1210 1211 out: 1212 mutex_unlock(&priv->lock); 1213 return ret; 1214 } 1215 1216 static int csi_enum_frame_size(struct v4l2_subdev *sd, 1217 struct v4l2_subdev_pad_config *cfg, 1218 struct v4l2_subdev_frame_size_enum *fse) 1219 { 1220 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1221 struct v4l2_rect *crop; 1222 int ret = 0; 1223 1224 if (fse->pad >= CSI_NUM_PADS || 1225 fse->index > (fse->pad == CSI_SINK_PAD ? 0 : 3)) 1226 return -EINVAL; 1227 1228 mutex_lock(&priv->lock); 1229 1230 if (fse->pad == CSI_SINK_PAD) { 1231 fse->min_width = MIN_W; 1232 fse->max_width = MAX_W; 1233 fse->min_height = MIN_H; 1234 fse->max_height = MAX_H; 1235 } else { 1236 crop = __csi_get_crop(priv, cfg, fse->which); 1237 1238 fse->min_width = fse->index & 1 ? 1239 crop->width / 2 : crop->width; 1240 fse->max_width = fse->min_width; 1241 fse->min_height = fse->index & 2 ? 1242 crop->height / 2 : crop->height; 1243 fse->max_height = fse->min_height; 1244 } 1245 1246 mutex_unlock(&priv->lock); 1247 return ret; 1248 } 1249 1250 static int csi_enum_frame_interval(struct v4l2_subdev *sd, 1251 struct v4l2_subdev_pad_config *cfg, 1252 struct v4l2_subdev_frame_interval_enum *fie) 1253 { 1254 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1255 struct v4l2_fract *input_fi; 1256 struct v4l2_rect *crop; 1257 int ret = 0; 1258 1259 if (fie->pad >= CSI_NUM_PADS || 1260 fie->index >= (fie->pad != CSI_SRC_PAD_IDMAC ? 1261 1 : ARRAY_SIZE(csi_skip))) 1262 return -EINVAL; 1263 1264 mutex_lock(&priv->lock); 1265 1266 input_fi = &priv->frame_interval[CSI_SINK_PAD]; 1267 crop = __csi_get_crop(priv, cfg, fie->which); 1268 1269 if ((fie->width != crop->width && fie->width != crop->width / 2) || 1270 (fie->height != crop->height && fie->height != crop->height / 2)) { 1271 ret = -EINVAL; 1272 goto out; 1273 } 1274 1275 fie->interval = *input_fi; 1276 1277 if (fie->pad == CSI_SRC_PAD_IDMAC) 1278 csi_apply_skip_interval(&csi_skip[fie->index], 1279 &fie->interval); 1280 1281 out: 1282 mutex_unlock(&priv->lock); 1283 return ret; 1284 } 1285 1286 static int csi_get_fmt(struct v4l2_subdev *sd, 1287 struct v4l2_subdev_pad_config *cfg, 1288 struct v4l2_subdev_format *sdformat) 1289 { 1290 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1291 struct v4l2_mbus_framefmt *fmt; 1292 int ret = 0; 1293 1294 if (sdformat->pad >= CSI_NUM_PADS) 1295 return -EINVAL; 1296 1297 mutex_lock(&priv->lock); 1298 1299 fmt = __csi_get_fmt(priv, cfg, sdformat->pad, sdformat->which); 1300 if (!fmt) { 1301 ret = -EINVAL; 1302 goto out; 1303 } 1304 1305 sdformat->format = *fmt; 1306 out: 1307 mutex_unlock(&priv->lock); 1308 return ret; 1309 } 1310 1311 static void csi_try_fmt(struct csi_priv *priv, 1312 struct v4l2_fwnode_endpoint *upstream_ep, 1313 struct v4l2_subdev_pad_config *cfg, 1314 struct v4l2_subdev_format *sdformat, 1315 struct v4l2_rect *crop, 1316 struct v4l2_rect *compose, 1317 const struct imx_media_pixfmt **cc) 1318 { 1319 const struct imx_media_pixfmt *incc; 1320 struct v4l2_mbus_framefmt *infmt; 1321 u32 code; 1322 1323 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sdformat->which); 1324 1325 switch (sdformat->pad) { 1326 case CSI_SRC_PAD_DIRECT: 1327 case CSI_SRC_PAD_IDMAC: 1328 incc = imx_media_find_mbus_format(infmt->code, 1329 CS_SEL_ANY, true); 1330 1331 sdformat->format.width = compose->width; 1332 sdformat->format.height = compose->height; 1333 1334 if (requires_passthrough(upstream_ep, infmt, incc)) { 1335 sdformat->format.code = infmt->code; 1336 *cc = incc; 1337 } else { 1338 u32 cs_sel = (incc->cs == IPUV3_COLORSPACE_YUV) ? 1339 CS_SEL_YUV : CS_SEL_RGB; 1340 1341 *cc = imx_media_find_ipu_format(sdformat->format.code, 1342 cs_sel); 1343 if (!*cc) { 1344 imx_media_enum_ipu_format(&code, 0, cs_sel); 1345 *cc = imx_media_find_ipu_format(code, cs_sel); 1346 sdformat->format.code = (*cc)->codes[0]; 1347 } 1348 } 1349 1350 if (sdformat->pad == CSI_SRC_PAD_DIRECT || 1351 sdformat->format.field != V4L2_FIELD_NONE) 1352 sdformat->format.field = infmt->field; 1353 1354 /* 1355 * translate V4L2_FIELD_ALTERNATE to SEQ_TB or SEQ_BT 1356 * depending on input height (assume NTSC top-bottom 1357 * order if 480 lines, otherwise PAL bottom-top order). 1358 */ 1359 if (sdformat->format.field == V4L2_FIELD_ALTERNATE) { 1360 sdformat->format.field = (infmt->height == 480) ? 1361 V4L2_FIELD_SEQ_TB : V4L2_FIELD_SEQ_BT; 1362 } 1363 1364 /* propagate colorimetry from sink */ 1365 sdformat->format.colorspace = infmt->colorspace; 1366 sdformat->format.xfer_func = infmt->xfer_func; 1367 sdformat->format.quantization = infmt->quantization; 1368 sdformat->format.ycbcr_enc = infmt->ycbcr_enc; 1369 break; 1370 case CSI_SINK_PAD: 1371 v4l_bound_align_image(&sdformat->format.width, MIN_W, MAX_W, 1372 W_ALIGN, &sdformat->format.height, 1373 MIN_H, MAX_H, H_ALIGN, S_ALIGN); 1374 1375 /* Reset crop and compose rectangles */ 1376 crop->left = 0; 1377 crop->top = 0; 1378 crop->width = sdformat->format.width; 1379 crop->height = sdformat->format.height; 1380 csi_try_crop(priv, crop, cfg, &sdformat->format, upstream_ep); 1381 compose->left = 0; 1382 compose->top = 0; 1383 compose->width = crop->width; 1384 compose->height = crop->height; 1385 1386 *cc = imx_media_find_mbus_format(sdformat->format.code, 1387 CS_SEL_ANY, true); 1388 if (!*cc) { 1389 imx_media_enum_mbus_format(&code, 0, 1390 CS_SEL_ANY, false); 1391 *cc = imx_media_find_mbus_format(code, 1392 CS_SEL_ANY, false); 1393 sdformat->format.code = (*cc)->codes[0]; 1394 } 1395 1396 imx_media_fill_default_mbus_fields( 1397 &sdformat->format, infmt, 1398 priv->active_output_pad == CSI_SRC_PAD_DIRECT); 1399 break; 1400 } 1401 } 1402 1403 static int csi_set_fmt(struct v4l2_subdev *sd, 1404 struct v4l2_subdev_pad_config *cfg, 1405 struct v4l2_subdev_format *sdformat) 1406 { 1407 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1408 struct imx_media_video_dev *vdev = priv->vdev; 1409 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1410 const struct imx_media_pixfmt *cc; 1411 struct v4l2_pix_format vdev_fmt; 1412 struct v4l2_mbus_framefmt *fmt; 1413 struct v4l2_rect *crop, *compose; 1414 int ret; 1415 1416 if (sdformat->pad >= CSI_NUM_PADS) 1417 return -EINVAL; 1418 1419 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1420 if (ret) { 1421 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1422 return ret; 1423 } 1424 1425 mutex_lock(&priv->lock); 1426 1427 if (priv->stream_count > 0) { 1428 ret = -EBUSY; 1429 goto out; 1430 } 1431 1432 crop = __csi_get_crop(priv, cfg, sdformat->which); 1433 compose = __csi_get_compose(priv, cfg, sdformat->which); 1434 1435 csi_try_fmt(priv, &upstream_ep, cfg, sdformat, crop, compose, &cc); 1436 1437 fmt = __csi_get_fmt(priv, cfg, sdformat->pad, sdformat->which); 1438 *fmt = sdformat->format; 1439 1440 if (sdformat->pad == CSI_SINK_PAD) { 1441 int pad; 1442 1443 /* propagate format to source pads */ 1444 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) { 1445 const struct imx_media_pixfmt *outcc; 1446 struct v4l2_mbus_framefmt *outfmt; 1447 struct v4l2_subdev_format format; 1448 1449 format.pad = pad; 1450 format.which = sdformat->which; 1451 format.format = sdformat->format; 1452 csi_try_fmt(priv, &upstream_ep, cfg, &format, 1453 NULL, compose, &outcc); 1454 1455 outfmt = __csi_get_fmt(priv, cfg, pad, sdformat->which); 1456 *outfmt = format.format; 1457 1458 if (sdformat->which == V4L2_SUBDEV_FORMAT_ACTIVE) 1459 priv->cc[pad] = outcc; 1460 } 1461 } 1462 1463 if (sdformat->which == V4L2_SUBDEV_FORMAT_TRY) 1464 goto out; 1465 1466 priv->cc[sdformat->pad] = cc; 1467 1468 /* propagate IDMAC output pad format to capture device */ 1469 imx_media_mbus_fmt_to_pix_fmt(&vdev_fmt, 1470 &priv->format_mbus[CSI_SRC_PAD_IDMAC], 1471 priv->cc[CSI_SRC_PAD_IDMAC]); 1472 mutex_unlock(&priv->lock); 1473 imx_media_capture_device_set_format(vdev, &vdev_fmt); 1474 1475 return 0; 1476 out: 1477 mutex_unlock(&priv->lock); 1478 return ret; 1479 } 1480 1481 static int csi_get_selection(struct v4l2_subdev *sd, 1482 struct v4l2_subdev_pad_config *cfg, 1483 struct v4l2_subdev_selection *sel) 1484 { 1485 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1486 struct v4l2_mbus_framefmt *infmt; 1487 struct v4l2_rect *crop, *compose; 1488 int ret = 0; 1489 1490 if (sel->pad != CSI_SINK_PAD) 1491 return -EINVAL; 1492 1493 mutex_lock(&priv->lock); 1494 1495 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sel->which); 1496 crop = __csi_get_crop(priv, cfg, sel->which); 1497 compose = __csi_get_compose(priv, cfg, sel->which); 1498 1499 switch (sel->target) { 1500 case V4L2_SEL_TGT_CROP_BOUNDS: 1501 sel->r.left = 0; 1502 sel->r.top = 0; 1503 sel->r.width = infmt->width; 1504 sel->r.height = infmt->height; 1505 break; 1506 case V4L2_SEL_TGT_CROP: 1507 sel->r = *crop; 1508 break; 1509 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 1510 sel->r.left = 0; 1511 sel->r.top = 0; 1512 sel->r.width = crop->width; 1513 sel->r.height = crop->height; 1514 break; 1515 case V4L2_SEL_TGT_COMPOSE: 1516 sel->r = *compose; 1517 break; 1518 default: 1519 ret = -EINVAL; 1520 } 1521 1522 mutex_unlock(&priv->lock); 1523 return ret; 1524 } 1525 1526 static int csi_set_scale(u32 *compose, u32 crop, u32 flags) 1527 { 1528 if ((flags & (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE)) == 1529 (V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE) && 1530 *compose != crop && *compose != crop / 2) 1531 return -ERANGE; 1532 1533 if (*compose <= crop / 2 || 1534 (*compose < crop * 3 / 4 && !(flags & V4L2_SEL_FLAG_GE)) || 1535 (*compose < crop && (flags & V4L2_SEL_FLAG_LE))) 1536 *compose = crop / 2; 1537 else 1538 *compose = crop; 1539 1540 return 0; 1541 } 1542 1543 static int csi_set_selection(struct v4l2_subdev *sd, 1544 struct v4l2_subdev_pad_config *cfg, 1545 struct v4l2_subdev_selection *sel) 1546 { 1547 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1548 struct v4l2_fwnode_endpoint upstream_ep = { .bus_type = 0 }; 1549 struct v4l2_mbus_framefmt *infmt; 1550 struct v4l2_rect *crop, *compose; 1551 int pad, ret; 1552 1553 if (sel->pad != CSI_SINK_PAD) 1554 return -EINVAL; 1555 1556 ret = csi_get_upstream_endpoint(priv, &upstream_ep); 1557 if (ret) { 1558 v4l2_err(&priv->sd, "failed to find upstream endpoint\n"); 1559 return ret; 1560 } 1561 1562 mutex_lock(&priv->lock); 1563 1564 if (priv->stream_count > 0) { 1565 ret = -EBUSY; 1566 goto out; 1567 } 1568 1569 infmt = __csi_get_fmt(priv, cfg, CSI_SINK_PAD, sel->which); 1570 crop = __csi_get_crop(priv, cfg, sel->which); 1571 compose = __csi_get_compose(priv, cfg, sel->which); 1572 1573 switch (sel->target) { 1574 case V4L2_SEL_TGT_CROP: 1575 /* 1576 * Modifying the crop rectangle always changes the format on 1577 * the source pads. If the KEEP_CONFIG flag is set, just return 1578 * the current crop rectangle. 1579 */ 1580 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) { 1581 sel->r = priv->crop; 1582 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1583 *crop = sel->r; 1584 goto out; 1585 } 1586 1587 csi_try_crop(priv, &sel->r, cfg, infmt, &upstream_ep); 1588 1589 *crop = sel->r; 1590 1591 /* Reset scaling to 1:1 */ 1592 compose->width = crop->width; 1593 compose->height = crop->height; 1594 break; 1595 case V4L2_SEL_TGT_COMPOSE: 1596 /* 1597 * Modifying the compose rectangle always changes the format on 1598 * the source pads. If the KEEP_CONFIG flag is set, just return 1599 * the current compose rectangle. 1600 */ 1601 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) { 1602 sel->r = priv->compose; 1603 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1604 *compose = sel->r; 1605 goto out; 1606 } 1607 1608 sel->r.left = 0; 1609 sel->r.top = 0; 1610 ret = csi_set_scale(&sel->r.width, crop->width, sel->flags); 1611 if (ret) 1612 goto out; 1613 ret = csi_set_scale(&sel->r.height, crop->height, sel->flags); 1614 if (ret) 1615 goto out; 1616 1617 *compose = sel->r; 1618 break; 1619 default: 1620 ret = -EINVAL; 1621 goto out; 1622 } 1623 1624 /* Reset source pads to sink compose rectangle */ 1625 for (pad = CSI_SINK_PAD + 1; pad < CSI_NUM_PADS; pad++) { 1626 struct v4l2_mbus_framefmt *outfmt; 1627 1628 outfmt = __csi_get_fmt(priv, cfg, pad, sel->which); 1629 outfmt->width = compose->width; 1630 outfmt->height = compose->height; 1631 } 1632 1633 out: 1634 mutex_unlock(&priv->lock); 1635 return ret; 1636 } 1637 1638 static int csi_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, 1639 struct v4l2_event_subscription *sub) 1640 { 1641 if (sub->type != V4L2_EVENT_IMX_FRAME_INTERVAL_ERROR) 1642 return -EINVAL; 1643 if (sub->id != 0) 1644 return -EINVAL; 1645 1646 return v4l2_event_subscribe(fh, sub, 0, NULL); 1647 } 1648 1649 static int csi_unsubscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, 1650 struct v4l2_event_subscription *sub) 1651 { 1652 return v4l2_event_unsubscribe(fh, sub); 1653 } 1654 1655 /* 1656 * retrieve our pads parsed from the OF graph by the media device 1657 */ 1658 static int csi_registered(struct v4l2_subdev *sd) 1659 { 1660 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1661 struct ipu_csi *csi; 1662 int i, ret; 1663 u32 code; 1664 1665 /* get media device */ 1666 priv->md = dev_get_drvdata(sd->v4l2_dev->dev); 1667 1668 /* get handle to IPU CSI */ 1669 csi = ipu_csi_get(priv->ipu, priv->csi_id); 1670 if (IS_ERR(csi)) { 1671 v4l2_err(&priv->sd, "failed to get CSI%d\n", priv->csi_id); 1672 return PTR_ERR(csi); 1673 } 1674 priv->csi = csi; 1675 1676 for (i = 0; i < CSI_NUM_PADS; i++) { 1677 priv->pad[i].flags = (i == CSI_SINK_PAD) ? 1678 MEDIA_PAD_FL_SINK : MEDIA_PAD_FL_SOURCE; 1679 1680 code = 0; 1681 if (i != CSI_SINK_PAD) 1682 imx_media_enum_ipu_format(&code, 0, CS_SEL_YUV); 1683 1684 /* set a default mbus format */ 1685 ret = imx_media_init_mbus_fmt(&priv->format_mbus[i], 1686 640, 480, code, V4L2_FIELD_NONE, 1687 &priv->cc[i]); 1688 if (ret) 1689 goto put_csi; 1690 1691 /* init default frame interval */ 1692 priv->frame_interval[i].numerator = 1; 1693 priv->frame_interval[i].denominator = 30; 1694 } 1695 1696 /* disable frame skipping */ 1697 priv->skip = &csi_skip[0]; 1698 1699 /* init default crop and compose rectangle sizes */ 1700 priv->crop.width = 640; 1701 priv->crop.height = 480; 1702 priv->compose.width = 640; 1703 priv->compose.height = 480; 1704 1705 priv->fim = imx_media_fim_init(&priv->sd); 1706 if (IS_ERR(priv->fim)) { 1707 ret = PTR_ERR(priv->fim); 1708 goto put_csi; 1709 } 1710 1711 ret = media_entity_pads_init(&sd->entity, CSI_NUM_PADS, priv->pad); 1712 if (ret) 1713 goto free_fim; 1714 1715 ret = imx_media_capture_device_register(priv->vdev); 1716 if (ret) 1717 goto free_fim; 1718 1719 ret = imx_media_add_video_device(priv->md, priv->vdev); 1720 if (ret) 1721 goto unreg; 1722 1723 return 0; 1724 unreg: 1725 imx_media_capture_device_unregister(priv->vdev); 1726 free_fim: 1727 if (priv->fim) 1728 imx_media_fim_free(priv->fim); 1729 put_csi: 1730 ipu_csi_put(priv->csi); 1731 return ret; 1732 } 1733 1734 static void csi_unregistered(struct v4l2_subdev *sd) 1735 { 1736 struct csi_priv *priv = v4l2_get_subdevdata(sd); 1737 1738 imx_media_capture_device_unregister(priv->vdev); 1739 1740 if (priv->fim) 1741 imx_media_fim_free(priv->fim); 1742 1743 if (priv->csi) 1744 ipu_csi_put(priv->csi); 1745 } 1746 1747 static const struct media_entity_operations csi_entity_ops = { 1748 .link_setup = csi_link_setup, 1749 .link_validate = v4l2_subdev_link_validate, 1750 }; 1751 1752 static const struct v4l2_subdev_core_ops csi_core_ops = { 1753 .subscribe_event = csi_subscribe_event, 1754 .unsubscribe_event = csi_unsubscribe_event, 1755 }; 1756 1757 static const struct v4l2_subdev_video_ops csi_video_ops = { 1758 .g_frame_interval = csi_g_frame_interval, 1759 .s_frame_interval = csi_s_frame_interval, 1760 .s_stream = csi_s_stream, 1761 }; 1762 1763 static const struct v4l2_subdev_pad_ops csi_pad_ops = { 1764 .init_cfg = imx_media_init_cfg, 1765 .enum_mbus_code = csi_enum_mbus_code, 1766 .enum_frame_size = csi_enum_frame_size, 1767 .enum_frame_interval = csi_enum_frame_interval, 1768 .get_fmt = csi_get_fmt, 1769 .set_fmt = csi_set_fmt, 1770 .get_selection = csi_get_selection, 1771 .set_selection = csi_set_selection, 1772 .link_validate = csi_link_validate, 1773 }; 1774 1775 static const struct v4l2_subdev_ops csi_subdev_ops = { 1776 .core = &csi_core_ops, 1777 .video = &csi_video_ops, 1778 .pad = &csi_pad_ops, 1779 }; 1780 1781 static const struct v4l2_subdev_internal_ops csi_internal_ops = { 1782 .registered = csi_registered, 1783 .unregistered = csi_unregistered, 1784 }; 1785 1786 static int imx_csi_parse_endpoint(struct device *dev, 1787 struct v4l2_fwnode_endpoint *vep, 1788 struct v4l2_async_subdev *asd) 1789 { 1790 return fwnode_device_is_available(asd->match.fwnode) ? 0 : -EINVAL; 1791 } 1792 1793 static int imx_csi_async_register(struct csi_priv *priv) 1794 { 1795 struct v4l2_async_notifier *notifier; 1796 struct fwnode_handle *fwnode; 1797 unsigned int port; 1798 int ret; 1799 1800 notifier = kzalloc(sizeof(*notifier), GFP_KERNEL); 1801 if (!notifier) 1802 return -ENOMEM; 1803 1804 v4l2_async_notifier_init(notifier); 1805 1806 fwnode = dev_fwnode(priv->dev); 1807 1808 /* get this CSI's port id */ 1809 ret = fwnode_property_read_u32(fwnode, "reg", &port); 1810 if (ret < 0) 1811 goto out_free; 1812 1813 ret = v4l2_async_notifier_parse_fwnode_endpoints_by_port( 1814 priv->dev->parent, notifier, sizeof(struct v4l2_async_subdev), 1815 port, imx_csi_parse_endpoint); 1816 if (ret < 0) 1817 goto out_cleanup; 1818 1819 ret = v4l2_async_subdev_notifier_register(&priv->sd, notifier); 1820 if (ret < 0) 1821 goto out_cleanup; 1822 1823 ret = v4l2_async_register_subdev(&priv->sd); 1824 if (ret < 0) 1825 goto out_unregister; 1826 1827 priv->sd.subdev_notifier = notifier; 1828 1829 return 0; 1830 1831 out_unregister: 1832 v4l2_async_notifier_unregister(notifier); 1833 out_cleanup: 1834 v4l2_async_notifier_cleanup(notifier); 1835 out_free: 1836 kfree(notifier); 1837 1838 return ret; 1839 } 1840 1841 static int imx_csi_probe(struct platform_device *pdev) 1842 { 1843 struct ipu_client_platformdata *pdata; 1844 struct pinctrl *pinctrl; 1845 struct csi_priv *priv; 1846 int ret; 1847 1848 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 1849 if (!priv) 1850 return -ENOMEM; 1851 1852 platform_set_drvdata(pdev, &priv->sd); 1853 priv->dev = &pdev->dev; 1854 1855 ret = dma_set_coherent_mask(priv->dev, DMA_BIT_MASK(32)); 1856 if (ret) 1857 return ret; 1858 1859 /* get parent IPU */ 1860 priv->ipu = dev_get_drvdata(priv->dev->parent); 1861 1862 /* get our CSI id */ 1863 pdata = priv->dev->platform_data; 1864 priv->csi_id = pdata->csi; 1865 priv->smfc_id = (priv->csi_id == 0) ? 0 : 2; 1866 1867 timer_setup(&priv->eof_timeout_timer, csi_idmac_eof_timeout, 0); 1868 spin_lock_init(&priv->irqlock); 1869 1870 v4l2_subdev_init(&priv->sd, &csi_subdev_ops); 1871 v4l2_set_subdevdata(&priv->sd, priv); 1872 priv->sd.internal_ops = &csi_internal_ops; 1873 priv->sd.entity.ops = &csi_entity_ops; 1874 priv->sd.entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER; 1875 priv->sd.dev = &pdev->dev; 1876 priv->sd.fwnode = of_fwnode_handle(pdata->of_node); 1877 priv->sd.owner = THIS_MODULE; 1878 priv->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; 1879 priv->sd.grp_id = priv->csi_id ? 1880 IMX_MEDIA_GRP_ID_CSI1 : IMX_MEDIA_GRP_ID_CSI0; 1881 imx_media_grp_id_to_sd_name(priv->sd.name, sizeof(priv->sd.name), 1882 priv->sd.grp_id, ipu_get_num(priv->ipu)); 1883 1884 priv->vdev = imx_media_capture_device_init(&priv->sd, 1885 CSI_SRC_PAD_IDMAC); 1886 if (IS_ERR(priv->vdev)) 1887 return PTR_ERR(priv->vdev); 1888 1889 mutex_init(&priv->lock); 1890 1891 v4l2_ctrl_handler_init(&priv->ctrl_hdlr, 0); 1892 priv->sd.ctrl_handler = &priv->ctrl_hdlr; 1893 1894 /* 1895 * The IPUv3 driver did not assign an of_node to this 1896 * device. As a result, pinctrl does not automatically 1897 * configure our pin groups, so we need to do that manually 1898 * here, after setting this device's of_node. 1899 */ 1900 priv->dev->of_node = pdata->of_node; 1901 pinctrl = devm_pinctrl_get_select_default(priv->dev); 1902 if (IS_ERR(pinctrl)) { 1903 ret = PTR_ERR(pinctrl); 1904 dev_dbg(priv->dev, 1905 "devm_pinctrl_get_select_default() failed: %d\n", ret); 1906 if (ret != -ENODEV) 1907 goto free; 1908 } 1909 1910 ret = imx_csi_async_register(priv); 1911 if (ret) 1912 goto free; 1913 1914 return 0; 1915 free: 1916 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 1917 mutex_destroy(&priv->lock); 1918 imx_media_capture_device_remove(priv->vdev); 1919 return ret; 1920 } 1921 1922 static int imx_csi_remove(struct platform_device *pdev) 1923 { 1924 struct v4l2_subdev *sd = platform_get_drvdata(pdev); 1925 struct csi_priv *priv = sd_to_dev(sd); 1926 1927 v4l2_ctrl_handler_free(&priv->ctrl_hdlr); 1928 mutex_destroy(&priv->lock); 1929 imx_media_capture_device_remove(priv->vdev); 1930 v4l2_async_unregister_subdev(sd); 1931 media_entity_cleanup(&sd->entity); 1932 1933 return 0; 1934 } 1935 1936 static const struct platform_device_id imx_csi_ids[] = { 1937 { .name = "imx-ipuv3-csi" }, 1938 { }, 1939 }; 1940 MODULE_DEVICE_TABLE(platform, imx_csi_ids); 1941 1942 static struct platform_driver imx_csi_driver = { 1943 .probe = imx_csi_probe, 1944 .remove = imx_csi_remove, 1945 .id_table = imx_csi_ids, 1946 .driver = { 1947 .name = "imx-ipuv3-csi", 1948 }, 1949 }; 1950 module_platform_driver(imx_csi_driver); 1951 1952 MODULE_DESCRIPTION("i.MX CSI subdev driver"); 1953 MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>"); 1954 MODULE_LICENSE("GPL"); 1955 MODULE_ALIAS("platform:imx-ipuv3-csi"); 1956