1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * camss-csiphy.c 4 * 5 * Qualcomm MSM Camera Subsystem - CSIPHY Module 6 * 7 * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved. 8 * Copyright (C) 2016-2018 Linaro Ltd. 9 */ 10 #include <linux/clk.h> 11 #include <linux/delay.h> 12 #include <linux/interrupt.h> 13 #include <linux/io.h> 14 #include <linux/kernel.h> 15 #include <linux/of.h> 16 #include <linux/platform_device.h> 17 #include <linux/pm_runtime.h> 18 #include <media/media-entity.h> 19 #include <media/v4l2-device.h> 20 #include <media/v4l2-subdev.h> 21 22 #include "camss-csiphy.h" 23 #include "camss.h" 24 25 #define MSM_CSIPHY_NAME "msm_csiphy" 26 27 struct csiphy_format { 28 u32 code; 29 u8 bpp; 30 }; 31 32 static const struct csiphy_format csiphy_formats_8x16[] = { 33 { MEDIA_BUS_FMT_UYVY8_2X8, 8 }, 34 { MEDIA_BUS_FMT_VYUY8_2X8, 8 }, 35 { MEDIA_BUS_FMT_YUYV8_2X8, 8 }, 36 { MEDIA_BUS_FMT_YVYU8_2X8, 8 }, 37 { MEDIA_BUS_FMT_SBGGR8_1X8, 8 }, 38 { MEDIA_BUS_FMT_SGBRG8_1X8, 8 }, 39 { MEDIA_BUS_FMT_SGRBG8_1X8, 8 }, 40 { MEDIA_BUS_FMT_SRGGB8_1X8, 8 }, 41 { MEDIA_BUS_FMT_SBGGR10_1X10, 10 }, 42 { MEDIA_BUS_FMT_SGBRG10_1X10, 10 }, 43 { MEDIA_BUS_FMT_SGRBG10_1X10, 10 }, 44 { MEDIA_BUS_FMT_SRGGB10_1X10, 10 }, 45 { MEDIA_BUS_FMT_SBGGR12_1X12, 12 }, 46 { MEDIA_BUS_FMT_SGBRG12_1X12, 12 }, 47 { MEDIA_BUS_FMT_SGRBG12_1X12, 12 }, 48 { MEDIA_BUS_FMT_SRGGB12_1X12, 12 }, 49 { MEDIA_BUS_FMT_Y10_1X10, 10 }, 50 }; 51 52 static const struct csiphy_format csiphy_formats_8x96[] = { 53 { MEDIA_BUS_FMT_UYVY8_2X8, 8 }, 54 { MEDIA_BUS_FMT_VYUY8_2X8, 8 }, 55 { MEDIA_BUS_FMT_YUYV8_2X8, 8 }, 56 { MEDIA_BUS_FMT_YVYU8_2X8, 8 }, 57 { MEDIA_BUS_FMT_SBGGR8_1X8, 8 }, 58 { MEDIA_BUS_FMT_SGBRG8_1X8, 8 }, 59 { MEDIA_BUS_FMT_SGRBG8_1X8, 8 }, 60 { MEDIA_BUS_FMT_SRGGB8_1X8, 8 }, 61 { MEDIA_BUS_FMT_SBGGR10_1X10, 10 }, 62 { MEDIA_BUS_FMT_SGBRG10_1X10, 10 }, 63 { MEDIA_BUS_FMT_SGRBG10_1X10, 10 }, 64 { MEDIA_BUS_FMT_SRGGB10_1X10, 10 }, 65 { MEDIA_BUS_FMT_SBGGR12_1X12, 12 }, 66 { MEDIA_BUS_FMT_SGBRG12_1X12, 12 }, 67 { MEDIA_BUS_FMT_SGRBG12_1X12, 12 }, 68 { MEDIA_BUS_FMT_SRGGB12_1X12, 12 }, 69 { MEDIA_BUS_FMT_SBGGR14_1X14, 14 }, 70 { MEDIA_BUS_FMT_SGBRG14_1X14, 14 }, 71 { MEDIA_BUS_FMT_SGRBG14_1X14, 14 }, 72 { MEDIA_BUS_FMT_SRGGB14_1X14, 14 }, 73 { MEDIA_BUS_FMT_Y10_1X10, 10 }, 74 }; 75 76 /* 77 * csiphy_get_bpp - map media bus format to bits per pixel 78 * @formats: supported media bus formats array 79 * @nformats: size of @formats array 80 * @code: media bus format code 81 * 82 * Return number of bits per pixel 83 */ 84 static u8 csiphy_get_bpp(const struct csiphy_format *formats, 85 unsigned int nformats, u32 code) 86 { 87 unsigned int i; 88 89 for (i = 0; i < nformats; i++) 90 if (code == formats[i].code) 91 return formats[i].bpp; 92 93 WARN(1, "Unknown format\n"); 94 95 return formats[0].bpp; 96 } 97 98 /* 99 * csiphy_set_clock_rates - Calculate and set clock rates on CSIPHY module 100 * @csiphy: CSIPHY device 101 */ 102 static int csiphy_set_clock_rates(struct csiphy_device *csiphy) 103 { 104 struct device *dev = csiphy->camss->dev; 105 s64 link_freq; 106 int i, j; 107 int ret; 108 109 u8 bpp = csiphy_get_bpp(csiphy->formats, csiphy->nformats, 110 csiphy->fmt[MSM_CSIPHY_PAD_SINK].code); 111 u8 num_lanes = csiphy->cfg.csi2->lane_cfg.num_data; 112 113 link_freq = camss_get_link_freq(&csiphy->subdev.entity, bpp, num_lanes); 114 if (link_freq < 0) 115 link_freq = 0; 116 117 for (i = 0; i < csiphy->nclocks; i++) { 118 struct camss_clock *clock = &csiphy->clock[i]; 119 120 if (csiphy->rate_set[i]) { 121 u64 min_rate = link_freq / 4; 122 long round_rate; 123 124 camss_add_clock_margin(&min_rate); 125 126 for (j = 0; j < clock->nfreqs; j++) 127 if (min_rate < clock->freq[j]) 128 break; 129 130 if (j == clock->nfreqs) { 131 dev_err(dev, 132 "Pixel clock is too high for CSIPHY\n"); 133 return -EINVAL; 134 } 135 136 /* if sensor pixel clock is not available */ 137 /* set highest possible CSIPHY clock rate */ 138 if (min_rate == 0) 139 j = clock->nfreqs - 1; 140 141 round_rate = clk_round_rate(clock->clk, clock->freq[j]); 142 if (round_rate < 0) { 143 dev_err(dev, "clk round rate failed: %ld\n", 144 round_rate); 145 return -EINVAL; 146 } 147 148 csiphy->timer_clk_rate = round_rate; 149 150 ret = clk_set_rate(clock->clk, csiphy->timer_clk_rate); 151 if (ret < 0) { 152 dev_err(dev, "clk set rate failed: %d\n", ret); 153 return ret; 154 } 155 } 156 } 157 158 return 0; 159 } 160 161 /* 162 * csiphy_set_power - Power on/off CSIPHY module 163 * @sd: CSIPHY V4L2 subdevice 164 * @on: Requested power state 165 * 166 * Return 0 on success or a negative error code otherwise 167 */ 168 static int csiphy_set_power(struct v4l2_subdev *sd, int on) 169 { 170 struct csiphy_device *csiphy = v4l2_get_subdevdata(sd); 171 struct device *dev = csiphy->camss->dev; 172 173 if (on) { 174 int ret; 175 176 ret = pm_runtime_get_sync(dev); 177 if (ret < 0) { 178 pm_runtime_put_sync(dev); 179 return ret; 180 } 181 182 ret = csiphy_set_clock_rates(csiphy); 183 if (ret < 0) { 184 pm_runtime_put_sync(dev); 185 return ret; 186 } 187 188 ret = camss_enable_clocks(csiphy->nclocks, csiphy->clock, dev); 189 if (ret < 0) { 190 pm_runtime_put_sync(dev); 191 return ret; 192 } 193 194 enable_irq(csiphy->irq); 195 196 csiphy->ops->reset(csiphy); 197 198 csiphy->ops->hw_version_read(csiphy, dev); 199 } else { 200 disable_irq(csiphy->irq); 201 202 camss_disable_clocks(csiphy->nclocks, csiphy->clock); 203 204 pm_runtime_put_sync(dev); 205 } 206 207 return 0; 208 } 209 210 /* 211 * csiphy_get_lane_mask - Calculate CSI2 lane mask configuration parameter 212 * @lane_cfg - CSI2 lane configuration 213 * 214 * Return lane mask 215 */ 216 static u8 csiphy_get_lane_mask(struct csiphy_lanes_cfg *lane_cfg) 217 { 218 u8 lane_mask; 219 int i; 220 221 lane_mask = 1 << lane_cfg->clk.pos; 222 223 for (i = 0; i < lane_cfg->num_data; i++) 224 lane_mask |= 1 << lane_cfg->data[i].pos; 225 226 return lane_mask; 227 } 228 229 /* 230 * csiphy_stream_on - Enable streaming on CSIPHY module 231 * @csiphy: CSIPHY device 232 * 233 * Helper function to enable streaming on CSIPHY module. 234 * Main configuration of CSIPHY module is also done here. 235 * 236 * Return 0 on success or a negative error code otherwise 237 */ 238 static int csiphy_stream_on(struct csiphy_device *csiphy) 239 { 240 struct csiphy_config *cfg = &csiphy->cfg; 241 s64 link_freq; 242 u8 lane_mask = csiphy_get_lane_mask(&cfg->csi2->lane_cfg); 243 u8 bpp = csiphy_get_bpp(csiphy->formats, csiphy->nformats, 244 csiphy->fmt[MSM_CSIPHY_PAD_SINK].code); 245 u8 num_lanes = csiphy->cfg.csi2->lane_cfg.num_data; 246 u8 val; 247 248 link_freq = camss_get_link_freq(&csiphy->subdev.entity, bpp, num_lanes); 249 250 if (link_freq < 0) { 251 dev_err(csiphy->camss->dev, 252 "Cannot get CSI2 transmitter's link frequency\n"); 253 return -EINVAL; 254 } 255 256 val = readl_relaxed(csiphy->base_clk_mux); 257 if (cfg->combo_mode && (lane_mask & 0x18) == 0x18) { 258 val &= ~0xf0; 259 val |= cfg->csid_id << 4; 260 } else { 261 val &= ~0xf; 262 val |= cfg->csid_id; 263 } 264 writel_relaxed(val, csiphy->base_clk_mux); 265 wmb(); 266 267 csiphy->ops->lanes_enable(csiphy, cfg, link_freq, lane_mask); 268 269 return 0; 270 } 271 272 /* 273 * csiphy_stream_off - Disable streaming on CSIPHY module 274 * @csiphy: CSIPHY device 275 * 276 * Helper function to disable streaming on CSIPHY module 277 */ 278 static void csiphy_stream_off(struct csiphy_device *csiphy) 279 { 280 csiphy->ops->lanes_disable(csiphy, &csiphy->cfg); 281 } 282 283 284 /* 285 * csiphy_set_stream - Enable/disable streaming on CSIPHY module 286 * @sd: CSIPHY V4L2 subdevice 287 * @enable: Requested streaming state 288 * 289 * Return 0 on success or a negative error code otherwise 290 */ 291 static int csiphy_set_stream(struct v4l2_subdev *sd, int enable) 292 { 293 struct csiphy_device *csiphy = v4l2_get_subdevdata(sd); 294 int ret = 0; 295 296 if (enable) 297 ret = csiphy_stream_on(csiphy); 298 else 299 csiphy_stream_off(csiphy); 300 301 return ret; 302 } 303 304 /* 305 * __csiphy_get_format - Get pointer to format structure 306 * @csiphy: CSIPHY device 307 * @cfg: V4L2 subdev pad configuration 308 * @pad: pad from which format is requested 309 * @which: TRY or ACTIVE format 310 * 311 * Return pointer to TRY or ACTIVE format structure 312 */ 313 static struct v4l2_mbus_framefmt * 314 __csiphy_get_format(struct csiphy_device *csiphy, 315 struct v4l2_subdev_pad_config *cfg, 316 unsigned int pad, 317 enum v4l2_subdev_format_whence which) 318 { 319 if (which == V4L2_SUBDEV_FORMAT_TRY) 320 return v4l2_subdev_get_try_format(&csiphy->subdev, cfg, pad); 321 322 return &csiphy->fmt[pad]; 323 } 324 325 /* 326 * csiphy_try_format - Handle try format by pad subdev method 327 * @csiphy: CSIPHY device 328 * @cfg: V4L2 subdev pad configuration 329 * @pad: pad on which format is requested 330 * @fmt: pointer to v4l2 format structure 331 * @which: wanted subdev format 332 */ 333 static void csiphy_try_format(struct csiphy_device *csiphy, 334 struct v4l2_subdev_pad_config *cfg, 335 unsigned int pad, 336 struct v4l2_mbus_framefmt *fmt, 337 enum v4l2_subdev_format_whence which) 338 { 339 unsigned int i; 340 341 switch (pad) { 342 case MSM_CSIPHY_PAD_SINK: 343 /* Set format on sink pad */ 344 345 for (i = 0; i < csiphy->nformats; i++) 346 if (fmt->code == csiphy->formats[i].code) 347 break; 348 349 /* If not found, use UYVY as default */ 350 if (i >= csiphy->nformats) 351 fmt->code = MEDIA_BUS_FMT_UYVY8_2X8; 352 353 fmt->width = clamp_t(u32, fmt->width, 1, 8191); 354 fmt->height = clamp_t(u32, fmt->height, 1, 8191); 355 356 fmt->field = V4L2_FIELD_NONE; 357 fmt->colorspace = V4L2_COLORSPACE_SRGB; 358 359 break; 360 361 case MSM_CSIPHY_PAD_SRC: 362 /* Set and return a format same as sink pad */ 363 364 *fmt = *__csiphy_get_format(csiphy, cfg, MSM_CSID_PAD_SINK, 365 which); 366 367 break; 368 } 369 } 370 371 /* 372 * csiphy_enum_mbus_code - Handle pixel format enumeration 373 * @sd: CSIPHY V4L2 subdevice 374 * @cfg: V4L2 subdev pad configuration 375 * @code: pointer to v4l2_subdev_mbus_code_enum structure 376 * return -EINVAL or zero on success 377 */ 378 static int csiphy_enum_mbus_code(struct v4l2_subdev *sd, 379 struct v4l2_subdev_pad_config *cfg, 380 struct v4l2_subdev_mbus_code_enum *code) 381 { 382 struct csiphy_device *csiphy = v4l2_get_subdevdata(sd); 383 struct v4l2_mbus_framefmt *format; 384 385 if (code->pad == MSM_CSIPHY_PAD_SINK) { 386 if (code->index >= csiphy->nformats) 387 return -EINVAL; 388 389 code->code = csiphy->formats[code->index].code; 390 } else { 391 if (code->index > 0) 392 return -EINVAL; 393 394 format = __csiphy_get_format(csiphy, cfg, MSM_CSIPHY_PAD_SINK, 395 code->which); 396 397 code->code = format->code; 398 } 399 400 return 0; 401 } 402 403 /* 404 * csiphy_enum_frame_size - Handle frame size enumeration 405 * @sd: CSIPHY V4L2 subdevice 406 * @cfg: V4L2 subdev pad configuration 407 * @fse: pointer to v4l2_subdev_frame_size_enum structure 408 * return -EINVAL or zero on success 409 */ 410 static int csiphy_enum_frame_size(struct v4l2_subdev *sd, 411 struct v4l2_subdev_pad_config *cfg, 412 struct v4l2_subdev_frame_size_enum *fse) 413 { 414 struct csiphy_device *csiphy = v4l2_get_subdevdata(sd); 415 struct v4l2_mbus_framefmt format; 416 417 if (fse->index != 0) 418 return -EINVAL; 419 420 format.code = fse->code; 421 format.width = 1; 422 format.height = 1; 423 csiphy_try_format(csiphy, cfg, fse->pad, &format, fse->which); 424 fse->min_width = format.width; 425 fse->min_height = format.height; 426 427 if (format.code != fse->code) 428 return -EINVAL; 429 430 format.code = fse->code; 431 format.width = -1; 432 format.height = -1; 433 csiphy_try_format(csiphy, cfg, fse->pad, &format, fse->which); 434 fse->max_width = format.width; 435 fse->max_height = format.height; 436 437 return 0; 438 } 439 440 /* 441 * csiphy_get_format - Handle get format by pads subdev method 442 * @sd: CSIPHY V4L2 subdevice 443 * @cfg: V4L2 subdev pad configuration 444 * @fmt: pointer to v4l2 subdev format structure 445 * 446 * Return -EINVAL or zero on success 447 */ 448 static int csiphy_get_format(struct v4l2_subdev *sd, 449 struct v4l2_subdev_pad_config *cfg, 450 struct v4l2_subdev_format *fmt) 451 { 452 struct csiphy_device *csiphy = v4l2_get_subdevdata(sd); 453 struct v4l2_mbus_framefmt *format; 454 455 format = __csiphy_get_format(csiphy, cfg, fmt->pad, fmt->which); 456 if (format == NULL) 457 return -EINVAL; 458 459 fmt->format = *format; 460 461 return 0; 462 } 463 464 /* 465 * csiphy_set_format - Handle set format by pads subdev method 466 * @sd: CSIPHY V4L2 subdevice 467 * @cfg: V4L2 subdev pad configuration 468 * @fmt: pointer to v4l2 subdev format structure 469 * 470 * Return -EINVAL or zero on success 471 */ 472 static int csiphy_set_format(struct v4l2_subdev *sd, 473 struct v4l2_subdev_pad_config *cfg, 474 struct v4l2_subdev_format *fmt) 475 { 476 struct csiphy_device *csiphy = v4l2_get_subdevdata(sd); 477 struct v4l2_mbus_framefmt *format; 478 479 format = __csiphy_get_format(csiphy, cfg, fmt->pad, fmt->which); 480 if (format == NULL) 481 return -EINVAL; 482 483 csiphy_try_format(csiphy, cfg, fmt->pad, &fmt->format, fmt->which); 484 *format = fmt->format; 485 486 /* Propagate the format from sink to source */ 487 if (fmt->pad == MSM_CSIPHY_PAD_SINK) { 488 format = __csiphy_get_format(csiphy, cfg, MSM_CSIPHY_PAD_SRC, 489 fmt->which); 490 491 *format = fmt->format; 492 csiphy_try_format(csiphy, cfg, MSM_CSIPHY_PAD_SRC, format, 493 fmt->which); 494 } 495 496 return 0; 497 } 498 499 /* 500 * csiphy_init_formats - Initialize formats on all pads 501 * @sd: CSIPHY V4L2 subdevice 502 * @fh: V4L2 subdev file handle 503 * 504 * Initialize all pad formats with default values. 505 * 506 * Return 0 on success or a negative error code otherwise 507 */ 508 static int csiphy_init_formats(struct v4l2_subdev *sd, 509 struct v4l2_subdev_fh *fh) 510 { 511 struct v4l2_subdev_format format = { 512 .pad = MSM_CSIPHY_PAD_SINK, 513 .which = fh ? V4L2_SUBDEV_FORMAT_TRY : 514 V4L2_SUBDEV_FORMAT_ACTIVE, 515 .format = { 516 .code = MEDIA_BUS_FMT_UYVY8_2X8, 517 .width = 1920, 518 .height = 1080 519 } 520 }; 521 522 return csiphy_set_format(sd, fh ? fh->pad : NULL, &format); 523 } 524 525 /* 526 * msm_csiphy_subdev_init - Initialize CSIPHY device structure and resources 527 * @csiphy: CSIPHY device 528 * @res: CSIPHY module resources table 529 * @id: CSIPHY module id 530 * 531 * Return 0 on success or a negative error code otherwise 532 */ 533 int msm_csiphy_subdev_init(struct camss *camss, 534 struct csiphy_device *csiphy, 535 const struct resources *res, u8 id) 536 { 537 struct device *dev = camss->dev; 538 struct platform_device *pdev = to_platform_device(dev); 539 struct resource *r; 540 int i, j; 541 int ret; 542 543 csiphy->camss = camss; 544 csiphy->id = id; 545 csiphy->cfg.combo_mode = 0; 546 547 if (camss->version == CAMSS_8x16) { 548 csiphy->ops = &csiphy_ops_2ph_1_0; 549 csiphy->formats = csiphy_formats_8x16; 550 csiphy->nformats = ARRAY_SIZE(csiphy_formats_8x16); 551 } else if (camss->version == CAMSS_8x96 || 552 camss->version == CAMSS_660) { 553 csiphy->ops = &csiphy_ops_3ph_1_0; 554 csiphy->formats = csiphy_formats_8x96; 555 csiphy->nformats = ARRAY_SIZE(csiphy_formats_8x96); 556 } else { 557 return -EINVAL; 558 } 559 560 /* Memory */ 561 562 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, res->reg[0]); 563 csiphy->base = devm_ioremap_resource(dev, r); 564 if (IS_ERR(csiphy->base)) { 565 dev_err(dev, "could not map memory\n"); 566 return PTR_ERR(csiphy->base); 567 } 568 569 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, res->reg[1]); 570 csiphy->base_clk_mux = devm_ioremap_resource(dev, r); 571 if (IS_ERR(csiphy->base_clk_mux)) { 572 dev_err(dev, "could not map memory\n"); 573 return PTR_ERR(csiphy->base_clk_mux); 574 } 575 576 /* Interrupt */ 577 578 r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, 579 res->interrupt[0]); 580 if (!r) { 581 dev_err(dev, "missing IRQ\n"); 582 return -EINVAL; 583 } 584 585 csiphy->irq = r->start; 586 snprintf(csiphy->irq_name, sizeof(csiphy->irq_name), "%s_%s%d", 587 dev_name(dev), MSM_CSIPHY_NAME, csiphy->id); 588 589 ret = devm_request_irq(dev, csiphy->irq, csiphy->ops->isr, 590 IRQF_TRIGGER_RISING, csiphy->irq_name, csiphy); 591 if (ret < 0) { 592 dev_err(dev, "request_irq failed: %d\n", ret); 593 return ret; 594 } 595 596 disable_irq(csiphy->irq); 597 598 /* Clocks */ 599 600 csiphy->nclocks = 0; 601 while (res->clock[csiphy->nclocks]) 602 csiphy->nclocks++; 603 604 csiphy->clock = devm_kcalloc(dev, 605 csiphy->nclocks, sizeof(*csiphy->clock), 606 GFP_KERNEL); 607 if (!csiphy->clock) 608 return -ENOMEM; 609 610 csiphy->rate_set = devm_kcalloc(dev, 611 csiphy->nclocks, 612 sizeof(*csiphy->rate_set), 613 GFP_KERNEL); 614 if (!csiphy->rate_set) 615 return -ENOMEM; 616 617 for (i = 0; i < csiphy->nclocks; i++) { 618 struct camss_clock *clock = &csiphy->clock[i]; 619 620 clock->clk = devm_clk_get(dev, res->clock[i]); 621 if (IS_ERR(clock->clk)) 622 return PTR_ERR(clock->clk); 623 624 clock->name = res->clock[i]; 625 626 clock->nfreqs = 0; 627 while (res->clock_rate[i][clock->nfreqs]) 628 clock->nfreqs++; 629 630 if (!clock->nfreqs) { 631 clock->freq = NULL; 632 continue; 633 } 634 635 clock->freq = devm_kcalloc(dev, 636 clock->nfreqs, 637 sizeof(*clock->freq), 638 GFP_KERNEL); 639 if (!clock->freq) 640 return -ENOMEM; 641 642 for (j = 0; j < clock->nfreqs; j++) 643 clock->freq[j] = res->clock_rate[i][j]; 644 645 if (!strcmp(clock->name, "csiphy0_timer") || 646 !strcmp(clock->name, "csiphy1_timer") || 647 !strcmp(clock->name, "csiphy2_timer")) 648 csiphy->rate_set[i] = true; 649 650 if (camss->version == CAMSS_660 && 651 (!strcmp(clock->name, "csi0_phy") || 652 !strcmp(clock->name, "csi1_phy") || 653 !strcmp(clock->name, "csi2_phy"))) 654 csiphy->rate_set[i] = true; 655 } 656 657 return 0; 658 } 659 660 /* 661 * csiphy_link_setup - Setup CSIPHY connections 662 * @entity: Pointer to media entity structure 663 * @local: Pointer to local pad 664 * @remote: Pointer to remote pad 665 * @flags: Link flags 666 * 667 * Rreturn 0 on success 668 */ 669 static int csiphy_link_setup(struct media_entity *entity, 670 const struct media_pad *local, 671 const struct media_pad *remote, u32 flags) 672 { 673 if ((local->flags & MEDIA_PAD_FL_SOURCE) && 674 (flags & MEDIA_LNK_FL_ENABLED)) { 675 struct v4l2_subdev *sd; 676 struct csiphy_device *csiphy; 677 struct csid_device *csid; 678 679 if (media_entity_remote_pad(local)) 680 return -EBUSY; 681 682 sd = media_entity_to_v4l2_subdev(entity); 683 csiphy = v4l2_get_subdevdata(sd); 684 685 sd = media_entity_to_v4l2_subdev(remote->entity); 686 csid = v4l2_get_subdevdata(sd); 687 688 csiphy->cfg.csid_id = csid->id; 689 } 690 691 return 0; 692 } 693 694 static const struct v4l2_subdev_core_ops csiphy_core_ops = { 695 .s_power = csiphy_set_power, 696 }; 697 698 static const struct v4l2_subdev_video_ops csiphy_video_ops = { 699 .s_stream = csiphy_set_stream, 700 }; 701 702 static const struct v4l2_subdev_pad_ops csiphy_pad_ops = { 703 .enum_mbus_code = csiphy_enum_mbus_code, 704 .enum_frame_size = csiphy_enum_frame_size, 705 .get_fmt = csiphy_get_format, 706 .set_fmt = csiphy_set_format, 707 }; 708 709 static const struct v4l2_subdev_ops csiphy_v4l2_ops = { 710 .core = &csiphy_core_ops, 711 .video = &csiphy_video_ops, 712 .pad = &csiphy_pad_ops, 713 }; 714 715 static const struct v4l2_subdev_internal_ops csiphy_v4l2_internal_ops = { 716 .open = csiphy_init_formats, 717 }; 718 719 static const struct media_entity_operations csiphy_media_ops = { 720 .link_setup = csiphy_link_setup, 721 .link_validate = v4l2_subdev_link_validate, 722 }; 723 724 /* 725 * msm_csiphy_register_entity - Register subdev node for CSIPHY module 726 * @csiphy: CSIPHY device 727 * @v4l2_dev: V4L2 device 728 * 729 * Return 0 on success or a negative error code otherwise 730 */ 731 int msm_csiphy_register_entity(struct csiphy_device *csiphy, 732 struct v4l2_device *v4l2_dev) 733 { 734 struct v4l2_subdev *sd = &csiphy->subdev; 735 struct media_pad *pads = csiphy->pads; 736 struct device *dev = csiphy->camss->dev; 737 int ret; 738 739 v4l2_subdev_init(sd, &csiphy_v4l2_ops); 740 sd->internal_ops = &csiphy_v4l2_internal_ops; 741 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 742 snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d", 743 MSM_CSIPHY_NAME, csiphy->id); 744 v4l2_set_subdevdata(sd, csiphy); 745 746 ret = csiphy_init_formats(sd, NULL); 747 if (ret < 0) { 748 dev_err(dev, "Failed to init format: %d\n", ret); 749 return ret; 750 } 751 752 pads[MSM_CSIPHY_PAD_SINK].flags = MEDIA_PAD_FL_SINK; 753 pads[MSM_CSIPHY_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE; 754 755 sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER; 756 sd->entity.ops = &csiphy_media_ops; 757 ret = media_entity_pads_init(&sd->entity, MSM_CSIPHY_PADS_NUM, pads); 758 if (ret < 0) { 759 dev_err(dev, "Failed to init media entity: %d\n", ret); 760 return ret; 761 } 762 763 ret = v4l2_device_register_subdev(v4l2_dev, sd); 764 if (ret < 0) { 765 dev_err(dev, "Failed to register subdev: %d\n", ret); 766 media_entity_cleanup(&sd->entity); 767 } 768 769 return ret; 770 } 771 772 /* 773 * msm_csiphy_unregister_entity - Unregister CSIPHY module subdev node 774 * @csiphy: CSIPHY device 775 */ 776 void msm_csiphy_unregister_entity(struct csiphy_device *csiphy) 777 { 778 v4l2_device_unregister_subdev(&csiphy->subdev); 779 media_entity_cleanup(&csiphy->subdev.entity); 780 } 781