1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * ispccdc.c 4 * 5 * TI OMAP3 ISP - CCDC module 6 * 7 * Copyright (C) 2009-2010 Nokia Corporation 8 * Copyright (C) 2009 Texas Instruments, Inc. 9 * 10 * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com> 11 * Sakari Ailus <sakari.ailus@iki.fi> 12 */ 13 14 #include <linux/module.h> 15 #include <linux/uaccess.h> 16 #include <linux/delay.h> 17 #include <linux/device.h> 18 #include <linux/dma-mapping.h> 19 #include <linux/mm.h> 20 #include <linux/sched.h> 21 #include <linux/slab.h> 22 #include <media/v4l2-event.h> 23 24 #include "isp.h" 25 #include "ispreg.h" 26 #include "ispccdc.h" 27 28 #define CCDC_MIN_WIDTH 32 29 #define CCDC_MIN_HEIGHT 32 30 31 static struct v4l2_mbus_framefmt * 32 __ccdc_get_format(struct isp_ccdc_device *ccdc, 33 struct v4l2_subdev_state *sd_state, 34 unsigned int pad, enum v4l2_subdev_format_whence which); 35 36 static const unsigned int ccdc_fmts[] = { 37 MEDIA_BUS_FMT_Y8_1X8, 38 MEDIA_BUS_FMT_Y10_1X10, 39 MEDIA_BUS_FMT_Y12_1X12, 40 MEDIA_BUS_FMT_SGRBG8_1X8, 41 MEDIA_BUS_FMT_SRGGB8_1X8, 42 MEDIA_BUS_FMT_SBGGR8_1X8, 43 MEDIA_BUS_FMT_SGBRG8_1X8, 44 MEDIA_BUS_FMT_SGRBG10_1X10, 45 MEDIA_BUS_FMT_SRGGB10_1X10, 46 MEDIA_BUS_FMT_SBGGR10_1X10, 47 MEDIA_BUS_FMT_SGBRG10_1X10, 48 MEDIA_BUS_FMT_SGRBG12_1X12, 49 MEDIA_BUS_FMT_SRGGB12_1X12, 50 MEDIA_BUS_FMT_SBGGR12_1X12, 51 MEDIA_BUS_FMT_SGBRG12_1X12, 52 MEDIA_BUS_FMT_YUYV8_2X8, 53 MEDIA_BUS_FMT_UYVY8_2X8, 54 }; 55 56 /* 57 * ccdc_print_status - Print current CCDC Module register values. 58 * @ccdc: Pointer to ISP CCDC device. 59 * 60 * Also prints other debug information stored in the CCDC module. 61 */ 62 #define CCDC_PRINT_REGISTER(isp, name)\ 63 dev_dbg(isp->dev, "###CCDC " #name "=0x%08x\n", \ 64 isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_##name)) 65 66 static void ccdc_print_status(struct isp_ccdc_device *ccdc) 67 { 68 struct isp_device *isp = to_isp_device(ccdc); 69 70 dev_dbg(isp->dev, "-------------CCDC Register dump-------------\n"); 71 72 CCDC_PRINT_REGISTER(isp, PCR); 73 CCDC_PRINT_REGISTER(isp, SYN_MODE); 74 CCDC_PRINT_REGISTER(isp, HD_VD_WID); 75 CCDC_PRINT_REGISTER(isp, PIX_LINES); 76 CCDC_PRINT_REGISTER(isp, HORZ_INFO); 77 CCDC_PRINT_REGISTER(isp, VERT_START); 78 CCDC_PRINT_REGISTER(isp, VERT_LINES); 79 CCDC_PRINT_REGISTER(isp, CULLING); 80 CCDC_PRINT_REGISTER(isp, HSIZE_OFF); 81 CCDC_PRINT_REGISTER(isp, SDOFST); 82 CCDC_PRINT_REGISTER(isp, SDR_ADDR); 83 CCDC_PRINT_REGISTER(isp, CLAMP); 84 CCDC_PRINT_REGISTER(isp, DCSUB); 85 CCDC_PRINT_REGISTER(isp, COLPTN); 86 CCDC_PRINT_REGISTER(isp, BLKCMP); 87 CCDC_PRINT_REGISTER(isp, FPC); 88 CCDC_PRINT_REGISTER(isp, FPC_ADDR); 89 CCDC_PRINT_REGISTER(isp, VDINT); 90 CCDC_PRINT_REGISTER(isp, ALAW); 91 CCDC_PRINT_REGISTER(isp, REC656IF); 92 CCDC_PRINT_REGISTER(isp, CFG); 93 CCDC_PRINT_REGISTER(isp, FMTCFG); 94 CCDC_PRINT_REGISTER(isp, FMT_HORZ); 95 CCDC_PRINT_REGISTER(isp, FMT_VERT); 96 CCDC_PRINT_REGISTER(isp, PRGEVEN0); 97 CCDC_PRINT_REGISTER(isp, PRGEVEN1); 98 CCDC_PRINT_REGISTER(isp, PRGODD0); 99 CCDC_PRINT_REGISTER(isp, PRGODD1); 100 CCDC_PRINT_REGISTER(isp, VP_OUT); 101 CCDC_PRINT_REGISTER(isp, LSC_CONFIG); 102 CCDC_PRINT_REGISTER(isp, LSC_INITIAL); 103 CCDC_PRINT_REGISTER(isp, LSC_TABLE_BASE); 104 CCDC_PRINT_REGISTER(isp, LSC_TABLE_OFFSET); 105 106 dev_dbg(isp->dev, "--------------------------------------------\n"); 107 } 108 109 /* 110 * omap3isp_ccdc_busy - Get busy state of the CCDC. 111 * @ccdc: Pointer to ISP CCDC device. 112 */ 113 int omap3isp_ccdc_busy(struct isp_ccdc_device *ccdc) 114 { 115 struct isp_device *isp = to_isp_device(ccdc); 116 117 return isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_PCR) & 118 ISPCCDC_PCR_BUSY; 119 } 120 121 /* ----------------------------------------------------------------------------- 122 * Lens Shading Compensation 123 */ 124 125 /* 126 * ccdc_lsc_validate_config - Check that LSC configuration is valid. 127 * @ccdc: Pointer to ISP CCDC device. 128 * @lsc_cfg: the LSC configuration to check. 129 * 130 * Returns 0 if the LSC configuration is valid, or -EINVAL if invalid. 131 */ 132 static int ccdc_lsc_validate_config(struct isp_ccdc_device *ccdc, 133 struct omap3isp_ccdc_lsc_config *lsc_cfg) 134 { 135 struct isp_device *isp = to_isp_device(ccdc); 136 struct v4l2_mbus_framefmt *format; 137 unsigned int paxel_width, paxel_height; 138 unsigned int paxel_shift_x, paxel_shift_y; 139 unsigned int min_width, min_height, min_size; 140 unsigned int input_width, input_height; 141 142 paxel_shift_x = lsc_cfg->gain_mode_m; 143 paxel_shift_y = lsc_cfg->gain_mode_n; 144 145 if ((paxel_shift_x < 2) || (paxel_shift_x > 6) || 146 (paxel_shift_y < 2) || (paxel_shift_y > 6)) { 147 dev_dbg(isp->dev, "CCDC: LSC: Invalid paxel size\n"); 148 return -EINVAL; 149 } 150 151 if (lsc_cfg->offset & 3) { 152 dev_dbg(isp->dev, 153 "CCDC: LSC: Offset must be a multiple of 4\n"); 154 return -EINVAL; 155 } 156 157 if ((lsc_cfg->initial_x & 1) || (lsc_cfg->initial_y & 1)) { 158 dev_dbg(isp->dev, "CCDC: LSC: initial_x and y must be even\n"); 159 return -EINVAL; 160 } 161 162 format = __ccdc_get_format(ccdc, NULL, CCDC_PAD_SINK, 163 V4L2_SUBDEV_FORMAT_ACTIVE); 164 input_width = format->width; 165 input_height = format->height; 166 167 /* Calculate minimum bytesize for validation */ 168 paxel_width = 1 << paxel_shift_x; 169 min_width = ((input_width + lsc_cfg->initial_x + paxel_width - 1) 170 >> paxel_shift_x) + 1; 171 172 paxel_height = 1 << paxel_shift_y; 173 min_height = ((input_height + lsc_cfg->initial_y + paxel_height - 1) 174 >> paxel_shift_y) + 1; 175 176 min_size = 4 * min_width * min_height; 177 if (min_size > lsc_cfg->size) { 178 dev_dbg(isp->dev, "CCDC: LSC: too small table\n"); 179 return -EINVAL; 180 } 181 if (lsc_cfg->offset < (min_width * 4)) { 182 dev_dbg(isp->dev, "CCDC: LSC: Offset is too small\n"); 183 return -EINVAL; 184 } 185 if ((lsc_cfg->size / lsc_cfg->offset) < min_height) { 186 dev_dbg(isp->dev, "CCDC: LSC: Wrong size/offset combination\n"); 187 return -EINVAL; 188 } 189 return 0; 190 } 191 192 /* 193 * ccdc_lsc_program_table - Program Lens Shading Compensation table address. 194 * @ccdc: Pointer to ISP CCDC device. 195 */ 196 static void ccdc_lsc_program_table(struct isp_ccdc_device *ccdc, 197 dma_addr_t addr) 198 { 199 isp_reg_writel(to_isp_device(ccdc), addr, 200 OMAP3_ISP_IOMEM_CCDC, ISPCCDC_LSC_TABLE_BASE); 201 } 202 203 /* 204 * ccdc_lsc_setup_regs - Configures the lens shading compensation module 205 * @ccdc: Pointer to ISP CCDC device. 206 */ 207 static void ccdc_lsc_setup_regs(struct isp_ccdc_device *ccdc, 208 struct omap3isp_ccdc_lsc_config *cfg) 209 { 210 struct isp_device *isp = to_isp_device(ccdc); 211 int reg; 212 213 isp_reg_writel(isp, cfg->offset, OMAP3_ISP_IOMEM_CCDC, 214 ISPCCDC_LSC_TABLE_OFFSET); 215 216 reg = 0; 217 reg |= cfg->gain_mode_n << ISPCCDC_LSC_GAIN_MODE_N_SHIFT; 218 reg |= cfg->gain_mode_m << ISPCCDC_LSC_GAIN_MODE_M_SHIFT; 219 reg |= cfg->gain_format << ISPCCDC_LSC_GAIN_FORMAT_SHIFT; 220 isp_reg_writel(isp, reg, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_LSC_CONFIG); 221 222 reg = 0; 223 reg &= ~ISPCCDC_LSC_INITIAL_X_MASK; 224 reg |= cfg->initial_x << ISPCCDC_LSC_INITIAL_X_SHIFT; 225 reg &= ~ISPCCDC_LSC_INITIAL_Y_MASK; 226 reg |= cfg->initial_y << ISPCCDC_LSC_INITIAL_Y_SHIFT; 227 isp_reg_writel(isp, reg, OMAP3_ISP_IOMEM_CCDC, 228 ISPCCDC_LSC_INITIAL); 229 } 230 231 static int ccdc_lsc_wait_prefetch(struct isp_ccdc_device *ccdc) 232 { 233 struct isp_device *isp = to_isp_device(ccdc); 234 unsigned int wait; 235 236 isp_reg_writel(isp, IRQ0STATUS_CCDC_LSC_PREF_COMP_IRQ, 237 OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS); 238 239 /* timeout 1 ms */ 240 for (wait = 0; wait < 1000; wait++) { 241 if (isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS) & 242 IRQ0STATUS_CCDC_LSC_PREF_COMP_IRQ) { 243 isp_reg_writel(isp, IRQ0STATUS_CCDC_LSC_PREF_COMP_IRQ, 244 OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS); 245 return 0; 246 } 247 248 rmb(); 249 udelay(1); 250 } 251 252 return -ETIMEDOUT; 253 } 254 255 /* 256 * __ccdc_lsc_enable - Enables/Disables the Lens Shading Compensation module. 257 * @ccdc: Pointer to ISP CCDC device. 258 * @enable: 0 Disables LSC, 1 Enables LSC. 259 */ 260 static int __ccdc_lsc_enable(struct isp_ccdc_device *ccdc, int enable) 261 { 262 struct isp_device *isp = to_isp_device(ccdc); 263 const struct v4l2_mbus_framefmt *format = 264 __ccdc_get_format(ccdc, NULL, CCDC_PAD_SINK, 265 V4L2_SUBDEV_FORMAT_ACTIVE); 266 267 if ((format->code != MEDIA_BUS_FMT_SGRBG10_1X10) && 268 (format->code != MEDIA_BUS_FMT_SRGGB10_1X10) && 269 (format->code != MEDIA_BUS_FMT_SBGGR10_1X10) && 270 (format->code != MEDIA_BUS_FMT_SGBRG10_1X10)) 271 return -EINVAL; 272 273 if (enable) 274 omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CCDC_LSC_READ); 275 276 isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_LSC_CONFIG, 277 ISPCCDC_LSC_ENABLE, enable ? ISPCCDC_LSC_ENABLE : 0); 278 279 if (enable) { 280 if (ccdc_lsc_wait_prefetch(ccdc) < 0) { 281 isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCDC, 282 ISPCCDC_LSC_CONFIG, ISPCCDC_LSC_ENABLE); 283 ccdc->lsc.state = LSC_STATE_STOPPED; 284 dev_warn(to_device(ccdc), "LSC prefetch timeout\n"); 285 return -ETIMEDOUT; 286 } 287 ccdc->lsc.state = LSC_STATE_RUNNING; 288 } else { 289 ccdc->lsc.state = LSC_STATE_STOPPING; 290 } 291 292 return 0; 293 } 294 295 static int ccdc_lsc_busy(struct isp_ccdc_device *ccdc) 296 { 297 struct isp_device *isp = to_isp_device(ccdc); 298 299 return isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_LSC_CONFIG) & 300 ISPCCDC_LSC_BUSY; 301 } 302 303 /* 304 * __ccdc_lsc_configure - Apply a new configuration to the LSC engine 305 * @ccdc: Pointer to ISP CCDC device 306 * @req: New configuration request 307 */ 308 static int __ccdc_lsc_configure(struct isp_ccdc_device *ccdc, 309 struct ispccdc_lsc_config_req *req) 310 { 311 if (!req->enable) 312 return -EINVAL; 313 314 if (ccdc_lsc_validate_config(ccdc, &req->config) < 0) { 315 dev_dbg(to_device(ccdc), "Discard LSC configuration\n"); 316 return -EINVAL; 317 } 318 319 if (ccdc_lsc_busy(ccdc)) 320 return -EBUSY; 321 322 ccdc_lsc_setup_regs(ccdc, &req->config); 323 ccdc_lsc_program_table(ccdc, req->table.dma); 324 return 0; 325 } 326 327 /* 328 * ccdc_lsc_error_handler - Handle LSC prefetch error scenario. 329 * @ccdc: Pointer to ISP CCDC device. 330 * 331 * Disables LSC, and defers enablement to shadow registers update time. 332 */ 333 static void ccdc_lsc_error_handler(struct isp_ccdc_device *ccdc) 334 { 335 struct isp_device *isp = to_isp_device(ccdc); 336 /* 337 * From OMAP3 TRM: When this event is pending, the module 338 * goes into transparent mode (output =input). Normal 339 * operation can be resumed at the start of the next frame 340 * after: 341 * 1) Clearing this event 342 * 2) Disabling the LSC module 343 * 3) Enabling it 344 */ 345 isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_LSC_CONFIG, 346 ISPCCDC_LSC_ENABLE); 347 ccdc->lsc.state = LSC_STATE_STOPPED; 348 } 349 350 static void ccdc_lsc_free_request(struct isp_ccdc_device *ccdc, 351 struct ispccdc_lsc_config_req *req) 352 { 353 struct isp_device *isp = to_isp_device(ccdc); 354 355 if (req == NULL) 356 return; 357 358 if (req->table.addr) { 359 sg_free_table(&req->table.sgt); 360 dma_free_coherent(isp->dev, req->config.size, req->table.addr, 361 req->table.dma); 362 } 363 364 kfree(req); 365 } 366 367 static void ccdc_lsc_free_queue(struct isp_ccdc_device *ccdc, 368 struct list_head *queue) 369 { 370 struct ispccdc_lsc_config_req *req, *n; 371 unsigned long flags; 372 373 spin_lock_irqsave(&ccdc->lsc.req_lock, flags); 374 list_for_each_entry_safe(req, n, queue, list) { 375 list_del(&req->list); 376 spin_unlock_irqrestore(&ccdc->lsc.req_lock, flags); 377 ccdc_lsc_free_request(ccdc, req); 378 spin_lock_irqsave(&ccdc->lsc.req_lock, flags); 379 } 380 spin_unlock_irqrestore(&ccdc->lsc.req_lock, flags); 381 } 382 383 static void ccdc_lsc_free_table_work(struct work_struct *work) 384 { 385 struct isp_ccdc_device *ccdc; 386 struct ispccdc_lsc *lsc; 387 388 lsc = container_of(work, struct ispccdc_lsc, table_work); 389 ccdc = container_of(lsc, struct isp_ccdc_device, lsc); 390 391 ccdc_lsc_free_queue(ccdc, &lsc->free_queue); 392 } 393 394 /* 395 * ccdc_lsc_config - Configure the LSC module from a userspace request 396 * 397 * Store the request LSC configuration in the LSC engine request pointer. The 398 * configuration will be applied to the hardware when the CCDC will be enabled, 399 * or at the next LSC interrupt if the CCDC is already running. 400 */ 401 static int ccdc_lsc_config(struct isp_ccdc_device *ccdc, 402 struct omap3isp_ccdc_update_config *config) 403 { 404 struct isp_device *isp = to_isp_device(ccdc); 405 struct ispccdc_lsc_config_req *req; 406 unsigned long flags; 407 u16 update; 408 int ret; 409 410 update = config->update & 411 (OMAP3ISP_CCDC_CONFIG_LSC | OMAP3ISP_CCDC_TBL_LSC); 412 if (!update) 413 return 0; 414 415 if (update != (OMAP3ISP_CCDC_CONFIG_LSC | OMAP3ISP_CCDC_TBL_LSC)) { 416 dev_dbg(to_device(ccdc), 417 "%s: Both LSC configuration and table need to be supplied\n", 418 __func__); 419 return -EINVAL; 420 } 421 422 req = kzalloc(sizeof(*req), GFP_KERNEL); 423 if (req == NULL) 424 return -ENOMEM; 425 426 if (config->flag & OMAP3ISP_CCDC_CONFIG_LSC) { 427 if (copy_from_user(&req->config, config->lsc_cfg, 428 sizeof(req->config))) { 429 ret = -EFAULT; 430 goto done; 431 } 432 433 req->enable = 1; 434 435 req->table.addr = dma_alloc_coherent(isp->dev, req->config.size, 436 &req->table.dma, 437 GFP_KERNEL); 438 if (req->table.addr == NULL) { 439 ret = -ENOMEM; 440 goto done; 441 } 442 443 ret = dma_get_sgtable(isp->dev, &req->table.sgt, 444 req->table.addr, req->table.dma, 445 req->config.size); 446 if (ret < 0) 447 goto done; 448 449 dma_sync_sg_for_cpu(isp->dev, req->table.sgt.sgl, 450 req->table.sgt.nents, DMA_TO_DEVICE); 451 452 if (copy_from_user(req->table.addr, config->lsc, 453 req->config.size)) { 454 ret = -EFAULT; 455 goto done; 456 } 457 458 dma_sync_sg_for_device(isp->dev, req->table.sgt.sgl, 459 req->table.sgt.nents, DMA_TO_DEVICE); 460 } 461 462 spin_lock_irqsave(&ccdc->lsc.req_lock, flags); 463 if (ccdc->lsc.request) { 464 list_add_tail(&ccdc->lsc.request->list, &ccdc->lsc.free_queue); 465 schedule_work(&ccdc->lsc.table_work); 466 } 467 ccdc->lsc.request = req; 468 spin_unlock_irqrestore(&ccdc->lsc.req_lock, flags); 469 470 ret = 0; 471 472 done: 473 if (ret < 0) 474 ccdc_lsc_free_request(ccdc, req); 475 476 return ret; 477 } 478 479 static inline int ccdc_lsc_is_configured(struct isp_ccdc_device *ccdc) 480 { 481 unsigned long flags; 482 int ret; 483 484 spin_lock_irqsave(&ccdc->lsc.req_lock, flags); 485 ret = ccdc->lsc.active != NULL; 486 spin_unlock_irqrestore(&ccdc->lsc.req_lock, flags); 487 488 return ret; 489 } 490 491 static int ccdc_lsc_enable(struct isp_ccdc_device *ccdc) 492 { 493 struct ispccdc_lsc *lsc = &ccdc->lsc; 494 495 if (lsc->state != LSC_STATE_STOPPED) 496 return -EINVAL; 497 498 if (lsc->active) { 499 list_add_tail(&lsc->active->list, &lsc->free_queue); 500 lsc->active = NULL; 501 } 502 503 if (__ccdc_lsc_configure(ccdc, lsc->request) < 0) { 504 omap3isp_sbl_disable(to_isp_device(ccdc), 505 OMAP3_ISP_SBL_CCDC_LSC_READ); 506 list_add_tail(&lsc->request->list, &lsc->free_queue); 507 lsc->request = NULL; 508 goto done; 509 } 510 511 lsc->active = lsc->request; 512 lsc->request = NULL; 513 __ccdc_lsc_enable(ccdc, 1); 514 515 done: 516 if (!list_empty(&lsc->free_queue)) 517 schedule_work(&lsc->table_work); 518 519 return 0; 520 } 521 522 /* ----------------------------------------------------------------------------- 523 * Parameters configuration 524 */ 525 526 /* 527 * ccdc_configure_clamp - Configure optical-black or digital clamping 528 * @ccdc: Pointer to ISP CCDC device. 529 * 530 * The CCDC performs either optical-black or digital clamp. Configure and enable 531 * the selected clamp method. 532 */ 533 static void ccdc_configure_clamp(struct isp_ccdc_device *ccdc) 534 { 535 struct isp_device *isp = to_isp_device(ccdc); 536 u32 clamp; 537 538 if (ccdc->obclamp) { 539 clamp = ccdc->clamp.obgain << ISPCCDC_CLAMP_OBGAIN_SHIFT; 540 clamp |= ccdc->clamp.oblen << ISPCCDC_CLAMP_OBSLEN_SHIFT; 541 clamp |= ccdc->clamp.oblines << ISPCCDC_CLAMP_OBSLN_SHIFT; 542 clamp |= ccdc->clamp.obstpixel << ISPCCDC_CLAMP_OBST_SHIFT; 543 isp_reg_writel(isp, clamp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_CLAMP); 544 } else { 545 isp_reg_writel(isp, ccdc->clamp.dcsubval, 546 OMAP3_ISP_IOMEM_CCDC, ISPCCDC_DCSUB); 547 } 548 549 isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_CLAMP, 550 ISPCCDC_CLAMP_CLAMPEN, 551 ccdc->obclamp ? ISPCCDC_CLAMP_CLAMPEN : 0); 552 } 553 554 /* 555 * ccdc_configure_fpc - Configure Faulty Pixel Correction 556 * @ccdc: Pointer to ISP CCDC device. 557 */ 558 static void ccdc_configure_fpc(struct isp_ccdc_device *ccdc) 559 { 560 struct isp_device *isp = to_isp_device(ccdc); 561 562 isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_FPC, ISPCCDC_FPC_FPCEN); 563 564 if (!ccdc->fpc_en) 565 return; 566 567 isp_reg_writel(isp, ccdc->fpc.dma, OMAP3_ISP_IOMEM_CCDC, 568 ISPCCDC_FPC_ADDR); 569 /* The FPNUM field must be set before enabling FPC. */ 570 isp_reg_writel(isp, (ccdc->fpc.fpnum << ISPCCDC_FPC_FPNUM_SHIFT), 571 OMAP3_ISP_IOMEM_CCDC, ISPCCDC_FPC); 572 isp_reg_writel(isp, (ccdc->fpc.fpnum << ISPCCDC_FPC_FPNUM_SHIFT) | 573 ISPCCDC_FPC_FPCEN, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_FPC); 574 } 575 576 /* 577 * ccdc_configure_black_comp - Configure Black Level Compensation. 578 * @ccdc: Pointer to ISP CCDC device. 579 */ 580 static void ccdc_configure_black_comp(struct isp_ccdc_device *ccdc) 581 { 582 struct isp_device *isp = to_isp_device(ccdc); 583 u32 blcomp; 584 585 blcomp = ccdc->blcomp.b_mg << ISPCCDC_BLKCMP_B_MG_SHIFT; 586 blcomp |= ccdc->blcomp.gb_g << ISPCCDC_BLKCMP_GB_G_SHIFT; 587 blcomp |= ccdc->blcomp.gr_cy << ISPCCDC_BLKCMP_GR_CY_SHIFT; 588 blcomp |= ccdc->blcomp.r_ye << ISPCCDC_BLKCMP_R_YE_SHIFT; 589 590 isp_reg_writel(isp, blcomp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_BLKCMP); 591 } 592 593 /* 594 * ccdc_configure_lpf - Configure Low-Pass Filter (LPF). 595 * @ccdc: Pointer to ISP CCDC device. 596 */ 597 static void ccdc_configure_lpf(struct isp_ccdc_device *ccdc) 598 { 599 struct isp_device *isp = to_isp_device(ccdc); 600 601 isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SYN_MODE, 602 ISPCCDC_SYN_MODE_LPF, 603 ccdc->lpf ? ISPCCDC_SYN_MODE_LPF : 0); 604 } 605 606 /* 607 * ccdc_configure_alaw - Configure A-law compression. 608 * @ccdc: Pointer to ISP CCDC device. 609 */ 610 static void ccdc_configure_alaw(struct isp_ccdc_device *ccdc) 611 { 612 struct isp_device *isp = to_isp_device(ccdc); 613 const struct isp_format_info *info; 614 u32 alaw = 0; 615 616 info = omap3isp_video_format_info(ccdc->formats[CCDC_PAD_SINK].code); 617 618 switch (info->width) { 619 case 8: 620 return; 621 622 case 10: 623 alaw = ISPCCDC_ALAW_GWDI_9_0; 624 break; 625 case 11: 626 alaw = ISPCCDC_ALAW_GWDI_10_1; 627 break; 628 case 12: 629 alaw = ISPCCDC_ALAW_GWDI_11_2; 630 break; 631 case 13: 632 alaw = ISPCCDC_ALAW_GWDI_12_3; 633 break; 634 } 635 636 if (ccdc->alaw) 637 alaw |= ISPCCDC_ALAW_CCDTBL; 638 639 isp_reg_writel(isp, alaw, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_ALAW); 640 } 641 642 /* 643 * ccdc_config_imgattr - Configure sensor image specific attributes. 644 * @ccdc: Pointer to ISP CCDC device. 645 * @colptn: Color pattern of the sensor. 646 */ 647 static void ccdc_config_imgattr(struct isp_ccdc_device *ccdc, u32 colptn) 648 { 649 struct isp_device *isp = to_isp_device(ccdc); 650 651 isp_reg_writel(isp, colptn, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_COLPTN); 652 } 653 654 /* 655 * ccdc_config - Set CCDC configuration from userspace 656 * @ccdc: Pointer to ISP CCDC device. 657 * @ccdc_struct: Structure containing CCDC configuration sent from userspace. 658 * 659 * Returns 0 if successful, -EINVAL if the pointer to the configuration 660 * structure is null, or the copy_from_user function fails to copy user space 661 * memory to kernel space memory. 662 */ 663 static int ccdc_config(struct isp_ccdc_device *ccdc, 664 struct omap3isp_ccdc_update_config *ccdc_struct) 665 { 666 struct isp_device *isp = to_isp_device(ccdc); 667 unsigned long flags; 668 669 spin_lock_irqsave(&ccdc->lock, flags); 670 ccdc->shadow_update = 1; 671 spin_unlock_irqrestore(&ccdc->lock, flags); 672 673 if (OMAP3ISP_CCDC_ALAW & ccdc_struct->update) { 674 ccdc->alaw = !!(OMAP3ISP_CCDC_ALAW & ccdc_struct->flag); 675 ccdc->update |= OMAP3ISP_CCDC_ALAW; 676 } 677 678 if (OMAP3ISP_CCDC_LPF & ccdc_struct->update) { 679 ccdc->lpf = !!(OMAP3ISP_CCDC_LPF & ccdc_struct->flag); 680 ccdc->update |= OMAP3ISP_CCDC_LPF; 681 } 682 683 if (OMAP3ISP_CCDC_BLCLAMP & ccdc_struct->update) { 684 if (copy_from_user(&ccdc->clamp, ccdc_struct->bclamp, 685 sizeof(ccdc->clamp))) { 686 ccdc->shadow_update = 0; 687 return -EFAULT; 688 } 689 690 ccdc->obclamp = !!(OMAP3ISP_CCDC_BLCLAMP & ccdc_struct->flag); 691 ccdc->update |= OMAP3ISP_CCDC_BLCLAMP; 692 } 693 694 if (OMAP3ISP_CCDC_BCOMP & ccdc_struct->update) { 695 if (copy_from_user(&ccdc->blcomp, ccdc_struct->blcomp, 696 sizeof(ccdc->blcomp))) { 697 ccdc->shadow_update = 0; 698 return -EFAULT; 699 } 700 701 ccdc->update |= OMAP3ISP_CCDC_BCOMP; 702 } 703 704 ccdc->shadow_update = 0; 705 706 if (OMAP3ISP_CCDC_FPC & ccdc_struct->update) { 707 struct omap3isp_ccdc_fpc fpc; 708 struct ispccdc_fpc fpc_old = { .addr = NULL, }; 709 struct ispccdc_fpc fpc_new; 710 u32 size; 711 712 if (ccdc->state != ISP_PIPELINE_STREAM_STOPPED) 713 return -EBUSY; 714 715 ccdc->fpc_en = !!(OMAP3ISP_CCDC_FPC & ccdc_struct->flag); 716 717 if (ccdc->fpc_en) { 718 if (copy_from_user(&fpc, ccdc_struct->fpc, sizeof(fpc))) 719 return -EFAULT; 720 721 size = fpc.fpnum * 4; 722 723 /* 724 * The table address must be 64-bytes aligned, which is 725 * guaranteed by dma_alloc_coherent(). 726 */ 727 fpc_new.fpnum = fpc.fpnum; 728 fpc_new.addr = dma_alloc_coherent(isp->dev, size, 729 &fpc_new.dma, 730 GFP_KERNEL); 731 if (fpc_new.addr == NULL) 732 return -ENOMEM; 733 734 if (copy_from_user(fpc_new.addr, 735 (__force void __user *)(long)fpc.fpcaddr, 736 size)) { 737 dma_free_coherent(isp->dev, size, fpc_new.addr, 738 fpc_new.dma); 739 return -EFAULT; 740 } 741 742 fpc_old = ccdc->fpc; 743 ccdc->fpc = fpc_new; 744 } 745 746 ccdc_configure_fpc(ccdc); 747 748 if (fpc_old.addr != NULL) 749 dma_free_coherent(isp->dev, fpc_old.fpnum * 4, 750 fpc_old.addr, fpc_old.dma); 751 } 752 753 return ccdc_lsc_config(ccdc, ccdc_struct); 754 } 755 756 static void ccdc_apply_controls(struct isp_ccdc_device *ccdc) 757 { 758 if (ccdc->update & OMAP3ISP_CCDC_ALAW) { 759 ccdc_configure_alaw(ccdc); 760 ccdc->update &= ~OMAP3ISP_CCDC_ALAW; 761 } 762 763 if (ccdc->update & OMAP3ISP_CCDC_LPF) { 764 ccdc_configure_lpf(ccdc); 765 ccdc->update &= ~OMAP3ISP_CCDC_LPF; 766 } 767 768 if (ccdc->update & OMAP3ISP_CCDC_BLCLAMP) { 769 ccdc_configure_clamp(ccdc); 770 ccdc->update &= ~OMAP3ISP_CCDC_BLCLAMP; 771 } 772 773 if (ccdc->update & OMAP3ISP_CCDC_BCOMP) { 774 ccdc_configure_black_comp(ccdc); 775 ccdc->update &= ~OMAP3ISP_CCDC_BCOMP; 776 } 777 } 778 779 /* 780 * omap3isp_ccdc_restore_context - Restore values of the CCDC module registers 781 * @isp: Pointer to ISP device 782 */ 783 void omap3isp_ccdc_restore_context(struct isp_device *isp) 784 { 785 struct isp_ccdc_device *ccdc = &isp->isp_ccdc; 786 787 isp_reg_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_CFG, ISPCCDC_CFG_VDLC); 788 789 ccdc->update = OMAP3ISP_CCDC_ALAW | OMAP3ISP_CCDC_LPF 790 | OMAP3ISP_CCDC_BLCLAMP | OMAP3ISP_CCDC_BCOMP; 791 ccdc_apply_controls(ccdc); 792 ccdc_configure_fpc(ccdc); 793 } 794 795 /* ----------------------------------------------------------------------------- 796 * Format- and pipeline-related configuration helpers 797 */ 798 799 /* 800 * ccdc_config_vp - Configure the Video Port. 801 * @ccdc: Pointer to ISP CCDC device. 802 */ 803 static void ccdc_config_vp(struct isp_ccdc_device *ccdc) 804 { 805 struct isp_pipeline *pipe = to_isp_pipeline(&ccdc->subdev.entity); 806 struct isp_device *isp = to_isp_device(ccdc); 807 const struct isp_format_info *info; 808 struct v4l2_mbus_framefmt *format; 809 unsigned long l3_ick = pipe->l3_ick; 810 unsigned int max_div = isp->revision == ISP_REVISION_15_0 ? 64 : 8; 811 unsigned int div = 0; 812 u32 fmtcfg = ISPCCDC_FMTCFG_VPEN; 813 814 format = &ccdc->formats[CCDC_PAD_SOURCE_VP]; 815 816 if (!format->code) { 817 /* Disable the video port when the input format isn't supported. 818 * This is indicated by a pixel code set to 0. 819 */ 820 isp_reg_writel(isp, 0, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_FMTCFG); 821 return; 822 } 823 824 isp_reg_writel(isp, (0 << ISPCCDC_FMT_HORZ_FMTSPH_SHIFT) | 825 (format->width << ISPCCDC_FMT_HORZ_FMTLNH_SHIFT), 826 OMAP3_ISP_IOMEM_CCDC, ISPCCDC_FMT_HORZ); 827 isp_reg_writel(isp, (0 << ISPCCDC_FMT_VERT_FMTSLV_SHIFT) | 828 ((format->height + 1) << ISPCCDC_FMT_VERT_FMTLNV_SHIFT), 829 OMAP3_ISP_IOMEM_CCDC, ISPCCDC_FMT_VERT); 830 831 isp_reg_writel(isp, (format->width << ISPCCDC_VP_OUT_HORZ_NUM_SHIFT) | 832 (format->height << ISPCCDC_VP_OUT_VERT_NUM_SHIFT), 833 OMAP3_ISP_IOMEM_CCDC, ISPCCDC_VP_OUT); 834 835 info = omap3isp_video_format_info(ccdc->formats[CCDC_PAD_SINK].code); 836 837 switch (info->width) { 838 case 8: 839 case 10: 840 fmtcfg |= ISPCCDC_FMTCFG_VPIN_9_0; 841 break; 842 case 11: 843 fmtcfg |= ISPCCDC_FMTCFG_VPIN_10_1; 844 break; 845 case 12: 846 fmtcfg |= ISPCCDC_FMTCFG_VPIN_11_2; 847 break; 848 case 13: 849 fmtcfg |= ISPCCDC_FMTCFG_VPIN_12_3; 850 break; 851 } 852 853 if (pipe->input) 854 div = DIV_ROUND_UP(l3_ick, pipe->max_rate); 855 else if (pipe->external_rate) 856 div = l3_ick / pipe->external_rate; 857 858 div = clamp(div, 2U, max_div); 859 fmtcfg |= (div - 2) << ISPCCDC_FMTCFG_VPIF_FRQ_SHIFT; 860 861 isp_reg_writel(isp, fmtcfg, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_FMTCFG); 862 } 863 864 /* 865 * ccdc_config_outlineoffset - Configure memory saving output line offset 866 * @ccdc: Pointer to ISP CCDC device. 867 * @bpl: Number of bytes per line when stored in memory. 868 * @field: Field order when storing interlaced formats in memory. 869 * 870 * Configure the offsets for the line output control: 871 * 872 * - The horizontal line offset is defined as the number of bytes between the 873 * start of two consecutive lines in memory. Set it to the given bytes per 874 * line value. 875 * 876 * - The field offset value is defined as the number of lines to offset the 877 * start of the field identified by FID = 1. Set it to one. 878 * 879 * - The line offset values are defined as the number of lines (as defined by 880 * the horizontal line offset) between the start of two consecutive lines for 881 * all combinations of odd/even lines in odd/even fields. When interleaving 882 * fields set them all to two lines, and to one line otherwise. 883 */ 884 static void ccdc_config_outlineoffset(struct isp_ccdc_device *ccdc, 885 unsigned int bpl, 886 enum v4l2_field field) 887 { 888 struct isp_device *isp = to_isp_device(ccdc); 889 u32 sdofst = 0; 890 891 isp_reg_writel(isp, bpl & 0xffff, OMAP3_ISP_IOMEM_CCDC, 892 ISPCCDC_HSIZE_OFF); 893 894 switch (field) { 895 case V4L2_FIELD_INTERLACED_TB: 896 case V4L2_FIELD_INTERLACED_BT: 897 /* When interleaving fields in memory offset field one by one 898 * line and set the line offset to two lines. 899 */ 900 sdofst |= (1 << ISPCCDC_SDOFST_LOFST0_SHIFT) 901 | (1 << ISPCCDC_SDOFST_LOFST1_SHIFT) 902 | (1 << ISPCCDC_SDOFST_LOFST2_SHIFT) 903 | (1 << ISPCCDC_SDOFST_LOFST3_SHIFT); 904 break; 905 906 default: 907 /* In all other cases set the line offsets to one line. */ 908 break; 909 } 910 911 isp_reg_writel(isp, sdofst, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SDOFST); 912 } 913 914 /* 915 * ccdc_set_outaddr - Set memory address to save output image 916 * @ccdc: Pointer to ISP CCDC device. 917 * @addr: ISP MMU Mapped 32-bit memory address aligned on 32 byte boundary. 918 * 919 * Sets the memory address where the output will be saved. 920 */ 921 static void ccdc_set_outaddr(struct isp_ccdc_device *ccdc, u32 addr) 922 { 923 struct isp_device *isp = to_isp_device(ccdc); 924 925 isp_reg_writel(isp, addr, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SDR_ADDR); 926 } 927 928 /* 929 * omap3isp_ccdc_max_rate - Calculate maximum input data rate based on the input 930 * @ccdc: Pointer to ISP CCDC device. 931 * @max_rate: Maximum calculated data rate. 932 * 933 * Returns in *max_rate less value between calculated and passed 934 */ 935 void omap3isp_ccdc_max_rate(struct isp_ccdc_device *ccdc, 936 unsigned int *max_rate) 937 { 938 struct isp_pipeline *pipe = to_isp_pipeline(&ccdc->subdev.entity); 939 unsigned int rate; 940 941 if (pipe == NULL) 942 return; 943 944 /* 945 * TRM says that for parallel sensors the maximum data rate 946 * should be 90% form L3/2 clock, otherwise just L3/2. 947 */ 948 if (ccdc->input == CCDC_INPUT_PARALLEL) 949 rate = pipe->l3_ick / 2 * 9 / 10; 950 else 951 rate = pipe->l3_ick / 2; 952 953 *max_rate = min(*max_rate, rate); 954 } 955 956 /* 957 * ccdc_config_sync_if - Set CCDC sync interface configuration 958 * @ccdc: Pointer to ISP CCDC device. 959 * @parcfg: Parallel interface platform data (may be NULL) 960 * @data_size: Data size 961 */ 962 static void ccdc_config_sync_if(struct isp_ccdc_device *ccdc, 963 struct isp_parallel_cfg *parcfg, 964 unsigned int data_size) 965 { 966 struct isp_device *isp = to_isp_device(ccdc); 967 const struct v4l2_mbus_framefmt *format; 968 u32 syn_mode = ISPCCDC_SYN_MODE_VDHDEN; 969 970 format = &ccdc->formats[CCDC_PAD_SINK]; 971 972 if (format->code == MEDIA_BUS_FMT_YUYV8_2X8 || 973 format->code == MEDIA_BUS_FMT_UYVY8_2X8) { 974 /* According to the OMAP3 TRM the input mode only affects SYNC 975 * mode, enabling BT.656 mode should take precedence. However, 976 * in practice setting the input mode to YCbCr data on 8 bits 977 * seems to be required in BT.656 mode. In SYNC mode set it to 978 * YCbCr on 16 bits as the bridge is enabled in that case. 979 */ 980 if (ccdc->bt656) 981 syn_mode |= ISPCCDC_SYN_MODE_INPMOD_YCBCR8; 982 else 983 syn_mode |= ISPCCDC_SYN_MODE_INPMOD_YCBCR16; 984 } 985 986 switch (data_size) { 987 case 8: 988 syn_mode |= ISPCCDC_SYN_MODE_DATSIZ_8; 989 break; 990 case 10: 991 syn_mode |= ISPCCDC_SYN_MODE_DATSIZ_10; 992 break; 993 case 11: 994 syn_mode |= ISPCCDC_SYN_MODE_DATSIZ_11; 995 break; 996 case 12: 997 syn_mode |= ISPCCDC_SYN_MODE_DATSIZ_12; 998 break; 999 } 1000 1001 if (parcfg && parcfg->data_pol) 1002 syn_mode |= ISPCCDC_SYN_MODE_DATAPOL; 1003 1004 if (parcfg && parcfg->hs_pol) 1005 syn_mode |= ISPCCDC_SYN_MODE_HDPOL; 1006 1007 /* The polarity of the vertical sync signal output by the BT.656 1008 * decoder is not documented and seems to be active low. 1009 */ 1010 if ((parcfg && parcfg->vs_pol) || ccdc->bt656) 1011 syn_mode |= ISPCCDC_SYN_MODE_VDPOL; 1012 1013 if (parcfg && parcfg->fld_pol) 1014 syn_mode |= ISPCCDC_SYN_MODE_FLDPOL; 1015 1016 isp_reg_writel(isp, syn_mode, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SYN_MODE); 1017 1018 /* The CCDC_CFG.Y8POS bit is used in YCbCr8 input mode only. The 1019 * hardware seems to ignore it in all other input modes. 1020 */ 1021 if (format->code == MEDIA_BUS_FMT_UYVY8_2X8) 1022 isp_reg_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_CFG, 1023 ISPCCDC_CFG_Y8POS); 1024 else 1025 isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_CFG, 1026 ISPCCDC_CFG_Y8POS); 1027 1028 /* Enable or disable BT.656 mode, including error correction for the 1029 * synchronization codes. 1030 */ 1031 if (ccdc->bt656) 1032 isp_reg_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_REC656IF, 1033 ISPCCDC_REC656IF_R656ON | ISPCCDC_REC656IF_ECCFVH); 1034 else 1035 isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_REC656IF, 1036 ISPCCDC_REC656IF_R656ON | ISPCCDC_REC656IF_ECCFVH); 1037 1038 } 1039 1040 /* CCDC formats descriptions */ 1041 static const u32 ccdc_sgrbg_pattern = 1042 ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP0PLC0_SHIFT | 1043 ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP0PLC1_SHIFT | 1044 ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP0PLC2_SHIFT | 1045 ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP0PLC3_SHIFT | 1046 ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP1PLC0_SHIFT | 1047 ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP1PLC1_SHIFT | 1048 ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP1PLC2_SHIFT | 1049 ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP1PLC3_SHIFT | 1050 ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP2PLC0_SHIFT | 1051 ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP2PLC1_SHIFT | 1052 ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP2PLC2_SHIFT | 1053 ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP2PLC3_SHIFT | 1054 ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP3PLC0_SHIFT | 1055 ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP3PLC1_SHIFT | 1056 ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP3PLC2_SHIFT | 1057 ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP3PLC3_SHIFT; 1058 1059 static const u32 ccdc_srggb_pattern = 1060 ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP0PLC0_SHIFT | 1061 ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP0PLC1_SHIFT | 1062 ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP0PLC2_SHIFT | 1063 ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP0PLC3_SHIFT | 1064 ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP1PLC0_SHIFT | 1065 ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP1PLC1_SHIFT | 1066 ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP1PLC2_SHIFT | 1067 ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP1PLC3_SHIFT | 1068 ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP2PLC0_SHIFT | 1069 ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP2PLC1_SHIFT | 1070 ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP2PLC2_SHIFT | 1071 ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP2PLC3_SHIFT | 1072 ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP3PLC0_SHIFT | 1073 ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP3PLC1_SHIFT | 1074 ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP3PLC2_SHIFT | 1075 ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP3PLC3_SHIFT; 1076 1077 static const u32 ccdc_sbggr_pattern = 1078 ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP0PLC0_SHIFT | 1079 ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP0PLC1_SHIFT | 1080 ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP0PLC2_SHIFT | 1081 ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP0PLC3_SHIFT | 1082 ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP1PLC0_SHIFT | 1083 ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP1PLC1_SHIFT | 1084 ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP1PLC2_SHIFT | 1085 ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP1PLC3_SHIFT | 1086 ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP2PLC0_SHIFT | 1087 ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP2PLC1_SHIFT | 1088 ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP2PLC2_SHIFT | 1089 ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP2PLC3_SHIFT | 1090 ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP3PLC0_SHIFT | 1091 ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP3PLC1_SHIFT | 1092 ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP3PLC2_SHIFT | 1093 ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP3PLC3_SHIFT; 1094 1095 static const u32 ccdc_sgbrg_pattern = 1096 ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP0PLC0_SHIFT | 1097 ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP0PLC1_SHIFT | 1098 ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP0PLC2_SHIFT | 1099 ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP0PLC3_SHIFT | 1100 ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP1PLC0_SHIFT | 1101 ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP1PLC1_SHIFT | 1102 ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP1PLC2_SHIFT | 1103 ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP1PLC3_SHIFT | 1104 ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP2PLC0_SHIFT | 1105 ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP2PLC1_SHIFT | 1106 ISPCCDC_COLPTN_Gb_G << ISPCCDC_COLPTN_CP2PLC2_SHIFT | 1107 ISPCCDC_COLPTN_B_Mg << ISPCCDC_COLPTN_CP2PLC3_SHIFT | 1108 ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP3PLC0_SHIFT | 1109 ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP3PLC1_SHIFT | 1110 ISPCCDC_COLPTN_R_Ye << ISPCCDC_COLPTN_CP3PLC2_SHIFT | 1111 ISPCCDC_COLPTN_Gr_Cy << ISPCCDC_COLPTN_CP3PLC3_SHIFT; 1112 1113 static void ccdc_configure(struct isp_ccdc_device *ccdc) 1114 { 1115 struct isp_device *isp = to_isp_device(ccdc); 1116 struct isp_parallel_cfg *parcfg = NULL; 1117 struct v4l2_subdev *sensor; 1118 struct v4l2_mbus_framefmt *format; 1119 const struct v4l2_rect *crop; 1120 const struct isp_format_info *fmt_info; 1121 struct v4l2_subdev_format fmt_src; 1122 unsigned int depth_out; 1123 unsigned int depth_in = 0; 1124 struct media_pad *pad; 1125 unsigned long flags; 1126 unsigned int bridge; 1127 unsigned int shift; 1128 unsigned int nph; 1129 unsigned int sph; 1130 u32 syn_mode; 1131 u32 ccdc_pattern; 1132 1133 ccdc->bt656 = false; 1134 ccdc->fields = 0; 1135 1136 pad = media_pad_remote_pad_first(&ccdc->pads[CCDC_PAD_SINK]); 1137 sensor = media_entity_to_v4l2_subdev(pad->entity); 1138 if (ccdc->input == CCDC_INPUT_PARALLEL) { 1139 struct v4l2_subdev *sd = 1140 to_isp_pipeline(&ccdc->subdev.entity)->external; 1141 1142 parcfg = &v4l2_subdev_to_bus_cfg(sd)->bus.parallel; 1143 ccdc->bt656 = parcfg->bt656; 1144 } 1145 1146 /* CCDC_PAD_SINK */ 1147 format = &ccdc->formats[CCDC_PAD_SINK]; 1148 1149 /* Compute the lane shifter shift value and enable the bridge when the 1150 * input format is a non-BT.656 YUV variant. 1151 */ 1152 fmt_src.pad = pad->index; 1153 fmt_src.which = V4L2_SUBDEV_FORMAT_ACTIVE; 1154 if (!v4l2_subdev_call(sensor, pad, get_fmt, NULL, &fmt_src)) { 1155 fmt_info = omap3isp_video_format_info(fmt_src.format.code); 1156 depth_in = fmt_info->width; 1157 } 1158 1159 fmt_info = omap3isp_video_format_info(format->code); 1160 depth_out = fmt_info->width; 1161 shift = depth_in - depth_out; 1162 1163 if (ccdc->bt656) 1164 bridge = ISPCTRL_PAR_BRIDGE_DISABLE; 1165 else if (fmt_info->code == MEDIA_BUS_FMT_YUYV8_2X8) 1166 bridge = ISPCTRL_PAR_BRIDGE_LENDIAN; 1167 else if (fmt_info->code == MEDIA_BUS_FMT_UYVY8_2X8) 1168 bridge = ISPCTRL_PAR_BRIDGE_BENDIAN; 1169 else 1170 bridge = ISPCTRL_PAR_BRIDGE_DISABLE; 1171 1172 omap3isp_configure_bridge(isp, ccdc->input, parcfg, shift, bridge); 1173 1174 /* Configure the sync interface. */ 1175 ccdc_config_sync_if(ccdc, parcfg, depth_out); 1176 1177 syn_mode = isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SYN_MODE); 1178 1179 /* Use the raw, unprocessed data when writing to memory. The H3A and 1180 * histogram modules are still fed with lens shading corrected data. 1181 */ 1182 syn_mode &= ~ISPCCDC_SYN_MODE_VP2SDR; 1183 1184 if (ccdc->output & CCDC_OUTPUT_MEMORY) 1185 syn_mode |= ISPCCDC_SYN_MODE_WEN; 1186 else 1187 syn_mode &= ~ISPCCDC_SYN_MODE_WEN; 1188 1189 if (ccdc->output & CCDC_OUTPUT_RESIZER) 1190 syn_mode |= ISPCCDC_SYN_MODE_SDR2RSZ; 1191 else 1192 syn_mode &= ~ISPCCDC_SYN_MODE_SDR2RSZ; 1193 1194 /* Mosaic filter */ 1195 switch (format->code) { 1196 case MEDIA_BUS_FMT_SRGGB10_1X10: 1197 case MEDIA_BUS_FMT_SRGGB12_1X12: 1198 ccdc_pattern = ccdc_srggb_pattern; 1199 break; 1200 case MEDIA_BUS_FMT_SBGGR10_1X10: 1201 case MEDIA_BUS_FMT_SBGGR12_1X12: 1202 ccdc_pattern = ccdc_sbggr_pattern; 1203 break; 1204 case MEDIA_BUS_FMT_SGBRG10_1X10: 1205 case MEDIA_BUS_FMT_SGBRG12_1X12: 1206 ccdc_pattern = ccdc_sgbrg_pattern; 1207 break; 1208 default: 1209 /* Use GRBG */ 1210 ccdc_pattern = ccdc_sgrbg_pattern; 1211 break; 1212 } 1213 ccdc_config_imgattr(ccdc, ccdc_pattern); 1214 1215 /* Generate VD0 on the last line of the image and VD1 on the 1216 * 2/3 height line. 1217 */ 1218 isp_reg_writel(isp, ((format->height - 2) << ISPCCDC_VDINT_0_SHIFT) | 1219 ((format->height * 2 / 3) << ISPCCDC_VDINT_1_SHIFT), 1220 OMAP3_ISP_IOMEM_CCDC, ISPCCDC_VDINT); 1221 1222 /* CCDC_PAD_SOURCE_OF */ 1223 format = &ccdc->formats[CCDC_PAD_SOURCE_OF]; 1224 crop = &ccdc->crop; 1225 1226 /* The horizontal coordinates are expressed in pixel clock cycles. We 1227 * need two cycles per pixel in BT.656 mode, and one cycle per pixel in 1228 * SYNC mode regardless of the format as the bridge is enabled for YUV 1229 * formats in that case. 1230 */ 1231 if (ccdc->bt656) { 1232 sph = crop->left * 2; 1233 nph = crop->width * 2 - 1; 1234 } else { 1235 sph = crop->left; 1236 nph = crop->width - 1; 1237 } 1238 1239 isp_reg_writel(isp, (sph << ISPCCDC_HORZ_INFO_SPH_SHIFT) | 1240 (nph << ISPCCDC_HORZ_INFO_NPH_SHIFT), 1241 OMAP3_ISP_IOMEM_CCDC, ISPCCDC_HORZ_INFO); 1242 isp_reg_writel(isp, (crop->top << ISPCCDC_VERT_START_SLV0_SHIFT) | 1243 (crop->top << ISPCCDC_VERT_START_SLV1_SHIFT), 1244 OMAP3_ISP_IOMEM_CCDC, ISPCCDC_VERT_START); 1245 isp_reg_writel(isp, (crop->height - 1) 1246 << ISPCCDC_VERT_LINES_NLV_SHIFT, 1247 OMAP3_ISP_IOMEM_CCDC, ISPCCDC_VERT_LINES); 1248 1249 ccdc_config_outlineoffset(ccdc, ccdc->video_out.bpl_value, 1250 format->field); 1251 1252 /* When interleaving fields enable processing of the field input signal. 1253 * This will cause the line output control module to apply the field 1254 * offset to field 1. 1255 */ 1256 if (ccdc->formats[CCDC_PAD_SINK].field == V4L2_FIELD_ALTERNATE && 1257 (format->field == V4L2_FIELD_INTERLACED_TB || 1258 format->field == V4L2_FIELD_INTERLACED_BT)) 1259 syn_mode |= ISPCCDC_SYN_MODE_FLDMODE; 1260 1261 /* The CCDC outputs data in UYVY order by default. Swap bytes to get 1262 * YUYV. 1263 */ 1264 if (format->code == MEDIA_BUS_FMT_YUYV8_1X16) 1265 isp_reg_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_CFG, 1266 ISPCCDC_CFG_BSWD); 1267 else 1268 isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_CFG, 1269 ISPCCDC_CFG_BSWD); 1270 1271 /* Use PACK8 mode for 1byte per pixel formats. Check for BT.656 mode 1272 * explicitly as the driver reports 1X16 instead of 2X8 at the OF pad 1273 * for simplicity. 1274 */ 1275 if (omap3isp_video_format_info(format->code)->width <= 8 || ccdc->bt656) 1276 syn_mode |= ISPCCDC_SYN_MODE_PACK8; 1277 else 1278 syn_mode &= ~ISPCCDC_SYN_MODE_PACK8; 1279 1280 isp_reg_writel(isp, syn_mode, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SYN_MODE); 1281 1282 /* CCDC_PAD_SOURCE_VP */ 1283 ccdc_config_vp(ccdc); 1284 1285 /* Lens shading correction. */ 1286 spin_lock_irqsave(&ccdc->lsc.req_lock, flags); 1287 if (ccdc->lsc.request == NULL) 1288 goto unlock; 1289 1290 WARN_ON(ccdc->lsc.active); 1291 1292 /* Get last good LSC configuration. If it is not supported for 1293 * the current active resolution discard it. 1294 */ 1295 if (ccdc->lsc.active == NULL && 1296 __ccdc_lsc_configure(ccdc, ccdc->lsc.request) == 0) { 1297 ccdc->lsc.active = ccdc->lsc.request; 1298 } else { 1299 list_add_tail(&ccdc->lsc.request->list, &ccdc->lsc.free_queue); 1300 schedule_work(&ccdc->lsc.table_work); 1301 } 1302 1303 ccdc->lsc.request = NULL; 1304 1305 unlock: 1306 spin_unlock_irqrestore(&ccdc->lsc.req_lock, flags); 1307 1308 ccdc_apply_controls(ccdc); 1309 } 1310 1311 static void __ccdc_enable(struct isp_ccdc_device *ccdc, int enable) 1312 { 1313 struct isp_device *isp = to_isp_device(ccdc); 1314 1315 /* Avoid restarting the CCDC when streaming is stopping. */ 1316 if (enable && ccdc->stopping & CCDC_STOP_REQUEST) 1317 return; 1318 1319 isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_PCR, 1320 ISPCCDC_PCR_EN, enable ? ISPCCDC_PCR_EN : 0); 1321 1322 ccdc->running = enable; 1323 } 1324 1325 static int ccdc_disable(struct isp_ccdc_device *ccdc) 1326 { 1327 unsigned long flags; 1328 int ret = 0; 1329 1330 spin_lock_irqsave(&ccdc->lock, flags); 1331 if (ccdc->state == ISP_PIPELINE_STREAM_CONTINUOUS) 1332 ccdc->stopping = CCDC_STOP_REQUEST; 1333 if (!ccdc->running) 1334 ccdc->stopping = CCDC_STOP_FINISHED; 1335 spin_unlock_irqrestore(&ccdc->lock, flags); 1336 1337 ret = wait_event_timeout(ccdc->wait, 1338 ccdc->stopping == CCDC_STOP_FINISHED, 1339 msecs_to_jiffies(2000)); 1340 if (ret == 0) { 1341 ret = -ETIMEDOUT; 1342 dev_warn(to_device(ccdc), "CCDC stop timeout!\n"); 1343 } 1344 1345 omap3isp_sbl_disable(to_isp_device(ccdc), OMAP3_ISP_SBL_CCDC_LSC_READ); 1346 1347 mutex_lock(&ccdc->ioctl_lock); 1348 ccdc_lsc_free_request(ccdc, ccdc->lsc.request); 1349 ccdc->lsc.request = ccdc->lsc.active; 1350 ccdc->lsc.active = NULL; 1351 cancel_work_sync(&ccdc->lsc.table_work); 1352 ccdc_lsc_free_queue(ccdc, &ccdc->lsc.free_queue); 1353 mutex_unlock(&ccdc->ioctl_lock); 1354 1355 ccdc->stopping = CCDC_STOP_NOT_REQUESTED; 1356 1357 return ret > 0 ? 0 : ret; 1358 } 1359 1360 static void ccdc_enable(struct isp_ccdc_device *ccdc) 1361 { 1362 if (ccdc_lsc_is_configured(ccdc)) 1363 __ccdc_lsc_enable(ccdc, 1); 1364 __ccdc_enable(ccdc, 1); 1365 } 1366 1367 /* ----------------------------------------------------------------------------- 1368 * Interrupt handling 1369 */ 1370 1371 /* 1372 * ccdc_sbl_busy - Poll idle state of CCDC and related SBL memory write bits 1373 * @ccdc: Pointer to ISP CCDC device. 1374 * 1375 * Returns zero if the CCDC is idle and the image has been written to 1376 * memory, too. 1377 */ 1378 static int ccdc_sbl_busy(struct isp_ccdc_device *ccdc) 1379 { 1380 struct isp_device *isp = to_isp_device(ccdc); 1381 1382 return omap3isp_ccdc_busy(ccdc) 1383 | (isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_CCDC_WR_0) & 1384 ISPSBL_CCDC_WR_0_DATA_READY) 1385 | (isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_CCDC_WR_1) & 1386 ISPSBL_CCDC_WR_0_DATA_READY) 1387 | (isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_CCDC_WR_2) & 1388 ISPSBL_CCDC_WR_0_DATA_READY) 1389 | (isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_CCDC_WR_3) & 1390 ISPSBL_CCDC_WR_0_DATA_READY); 1391 } 1392 1393 /* 1394 * ccdc_sbl_wait_idle - Wait until the CCDC and related SBL are idle 1395 * @ccdc: Pointer to ISP CCDC device. 1396 * @max_wait: Max retry count in us for wait for idle/busy transition. 1397 */ 1398 static int ccdc_sbl_wait_idle(struct isp_ccdc_device *ccdc, 1399 unsigned int max_wait) 1400 { 1401 unsigned int wait = 0; 1402 1403 if (max_wait == 0) 1404 max_wait = 10000; /* 10 ms */ 1405 1406 for (wait = 0; wait <= max_wait; wait++) { 1407 if (!ccdc_sbl_busy(ccdc)) 1408 return 0; 1409 1410 rmb(); 1411 udelay(1); 1412 } 1413 1414 return -EBUSY; 1415 } 1416 1417 /* ccdc_handle_stopping - Handle CCDC and/or LSC stopping sequence 1418 * @ccdc: Pointer to ISP CCDC device. 1419 * @event: Pointing which event trigger handler 1420 * 1421 * Return 1 when the event and stopping request combination is satisfied, 1422 * zero otherwise. 1423 */ 1424 static int ccdc_handle_stopping(struct isp_ccdc_device *ccdc, u32 event) 1425 { 1426 int rval = 0; 1427 1428 switch ((ccdc->stopping & 3) | event) { 1429 case CCDC_STOP_REQUEST | CCDC_EVENT_VD1: 1430 if (ccdc->lsc.state != LSC_STATE_STOPPED) 1431 __ccdc_lsc_enable(ccdc, 0); 1432 __ccdc_enable(ccdc, 0); 1433 ccdc->stopping = CCDC_STOP_EXECUTED; 1434 return 1; 1435 1436 case CCDC_STOP_EXECUTED | CCDC_EVENT_VD0: 1437 ccdc->stopping |= CCDC_STOP_CCDC_FINISHED; 1438 if (ccdc->lsc.state == LSC_STATE_STOPPED) 1439 ccdc->stopping |= CCDC_STOP_LSC_FINISHED; 1440 rval = 1; 1441 break; 1442 1443 case CCDC_STOP_EXECUTED | CCDC_EVENT_LSC_DONE: 1444 ccdc->stopping |= CCDC_STOP_LSC_FINISHED; 1445 rval = 1; 1446 break; 1447 1448 case CCDC_STOP_EXECUTED | CCDC_EVENT_VD1: 1449 return 1; 1450 } 1451 1452 if (ccdc->stopping == CCDC_STOP_FINISHED) { 1453 wake_up(&ccdc->wait); 1454 rval = 1; 1455 } 1456 1457 return rval; 1458 } 1459 1460 static void ccdc_hs_vs_isr(struct isp_ccdc_device *ccdc) 1461 { 1462 struct isp_pipeline *pipe = to_isp_pipeline(&ccdc->subdev.entity); 1463 struct video_device *vdev = ccdc->subdev.devnode; 1464 struct v4l2_event event; 1465 1466 /* Frame number propagation */ 1467 atomic_inc(&pipe->frame_number); 1468 1469 memset(&event, 0, sizeof(event)); 1470 event.type = V4L2_EVENT_FRAME_SYNC; 1471 event.u.frame_sync.frame_sequence = atomic_read(&pipe->frame_number); 1472 1473 v4l2_event_queue(vdev, &event); 1474 } 1475 1476 /* 1477 * ccdc_lsc_isr - Handle LSC events 1478 * @ccdc: Pointer to ISP CCDC device. 1479 * @events: LSC events 1480 */ 1481 static void ccdc_lsc_isr(struct isp_ccdc_device *ccdc, u32 events) 1482 { 1483 unsigned long flags; 1484 1485 if (events & IRQ0STATUS_CCDC_LSC_PREF_ERR_IRQ) { 1486 struct isp_pipeline *pipe = 1487 to_isp_pipeline(&ccdc->subdev.entity); 1488 1489 ccdc_lsc_error_handler(ccdc); 1490 pipe->error = true; 1491 dev_dbg(to_device(ccdc), "lsc prefetch error\n"); 1492 } 1493 1494 if (!(events & IRQ0STATUS_CCDC_LSC_DONE_IRQ)) 1495 return; 1496 1497 /* LSC_DONE interrupt occur, there are two cases 1498 * 1. stopping for reconfiguration 1499 * 2. stopping because of STREAM OFF command 1500 */ 1501 spin_lock_irqsave(&ccdc->lsc.req_lock, flags); 1502 1503 if (ccdc->lsc.state == LSC_STATE_STOPPING) 1504 ccdc->lsc.state = LSC_STATE_STOPPED; 1505 1506 if (ccdc_handle_stopping(ccdc, CCDC_EVENT_LSC_DONE)) 1507 goto done; 1508 1509 if (ccdc->lsc.state != LSC_STATE_RECONFIG) 1510 goto done; 1511 1512 /* LSC is in STOPPING state, change to the new state */ 1513 ccdc->lsc.state = LSC_STATE_STOPPED; 1514 1515 /* This is an exception. Start of frame and LSC_DONE interrupt 1516 * have been received on the same time. Skip this event and wait 1517 * for better times. 1518 */ 1519 if (events & IRQ0STATUS_HS_VS_IRQ) 1520 goto done; 1521 1522 /* The LSC engine is stopped at this point. Enable it if there's a 1523 * pending request. 1524 */ 1525 if (ccdc->lsc.request == NULL) 1526 goto done; 1527 1528 ccdc_lsc_enable(ccdc); 1529 1530 done: 1531 spin_unlock_irqrestore(&ccdc->lsc.req_lock, flags); 1532 } 1533 1534 /* 1535 * Check whether the CCDC has captured all fields necessary to complete the 1536 * buffer. 1537 */ 1538 static bool ccdc_has_all_fields(struct isp_ccdc_device *ccdc) 1539 { 1540 struct isp_pipeline *pipe = to_isp_pipeline(&ccdc->subdev.entity); 1541 struct isp_device *isp = to_isp_device(ccdc); 1542 enum v4l2_field of_field = ccdc->formats[CCDC_PAD_SOURCE_OF].field; 1543 enum v4l2_field field; 1544 1545 /* When the input is progressive fields don't matter. */ 1546 if (of_field == V4L2_FIELD_NONE) 1547 return true; 1548 1549 /* Read the current field identifier. */ 1550 field = isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SYN_MODE) 1551 & ISPCCDC_SYN_MODE_FLDSTAT 1552 ? V4L2_FIELD_BOTTOM : V4L2_FIELD_TOP; 1553 1554 /* When capturing fields in alternate order just store the current field 1555 * identifier in the pipeline. 1556 */ 1557 if (of_field == V4L2_FIELD_ALTERNATE) { 1558 pipe->field = field; 1559 return true; 1560 } 1561 1562 /* The format is interlaced. Make sure we've captured both fields. */ 1563 ccdc->fields |= field == V4L2_FIELD_BOTTOM 1564 ? CCDC_FIELD_BOTTOM : CCDC_FIELD_TOP; 1565 1566 if (ccdc->fields != CCDC_FIELD_BOTH) 1567 return false; 1568 1569 /* Verify that the field just captured corresponds to the last field 1570 * needed based on the desired field order. 1571 */ 1572 if ((of_field == V4L2_FIELD_INTERLACED_TB && field == V4L2_FIELD_TOP) || 1573 (of_field == V4L2_FIELD_INTERLACED_BT && field == V4L2_FIELD_BOTTOM)) 1574 return false; 1575 1576 /* The buffer can be completed, reset the fields for the next buffer. */ 1577 ccdc->fields = 0; 1578 1579 return true; 1580 } 1581 1582 static int ccdc_isr_buffer(struct isp_ccdc_device *ccdc) 1583 { 1584 struct isp_pipeline *pipe = to_isp_pipeline(&ccdc->subdev.entity); 1585 struct isp_device *isp = to_isp_device(ccdc); 1586 struct isp_buffer *buffer; 1587 1588 /* The CCDC generates VD0 interrupts even when disabled (the datasheet 1589 * doesn't explicitly state if that's supposed to happen or not, so it 1590 * can be considered as a hardware bug or as a feature, but we have to 1591 * deal with it anyway). Disabling the CCDC when no buffer is available 1592 * would thus not be enough, we need to handle the situation explicitly. 1593 */ 1594 if (list_empty(&ccdc->video_out.dmaqueue)) 1595 return 0; 1596 1597 /* We're in continuous mode, and memory writes were disabled due to a 1598 * buffer underrun. Re-enable them now that we have a buffer. The buffer 1599 * address has been set in ccdc_video_queue. 1600 */ 1601 if (ccdc->state == ISP_PIPELINE_STREAM_CONTINUOUS && ccdc->underrun) { 1602 ccdc->underrun = 0; 1603 return 1; 1604 } 1605 1606 /* Wait for the CCDC to become idle. */ 1607 if (ccdc_sbl_wait_idle(ccdc, 1000)) { 1608 dev_info(isp->dev, "CCDC won't become idle!\n"); 1609 media_entity_enum_set(&isp->crashed, &ccdc->subdev.entity); 1610 omap3isp_pipeline_cancel_stream(pipe); 1611 return 0; 1612 } 1613 1614 /* Don't restart CCDC if we're just about to stop streaming. */ 1615 if (ccdc->state == ISP_PIPELINE_STREAM_CONTINUOUS && 1616 ccdc->stopping & CCDC_STOP_REQUEST) 1617 return 0; 1618 1619 if (!ccdc_has_all_fields(ccdc)) 1620 return 1; 1621 1622 buffer = omap3isp_video_buffer_next(&ccdc->video_out); 1623 if (buffer != NULL) 1624 ccdc_set_outaddr(ccdc, buffer->dma); 1625 1626 pipe->state |= ISP_PIPELINE_IDLE_OUTPUT; 1627 1628 if (ccdc->state == ISP_PIPELINE_STREAM_SINGLESHOT && 1629 isp_pipeline_ready(pipe)) 1630 omap3isp_pipeline_set_stream(pipe, 1631 ISP_PIPELINE_STREAM_SINGLESHOT); 1632 1633 return buffer != NULL; 1634 } 1635 1636 /* 1637 * ccdc_vd0_isr - Handle VD0 event 1638 * @ccdc: Pointer to ISP CCDC device. 1639 * 1640 * Executes LSC deferred enablement before next frame starts. 1641 */ 1642 static void ccdc_vd0_isr(struct isp_ccdc_device *ccdc) 1643 { 1644 unsigned long flags; 1645 int restart = 0; 1646 1647 /* In BT.656 mode the CCDC doesn't generate an HS/VS interrupt. We thus 1648 * need to increment the frame counter here. 1649 */ 1650 if (ccdc->bt656) { 1651 struct isp_pipeline *pipe = 1652 to_isp_pipeline(&ccdc->subdev.entity); 1653 1654 atomic_inc(&pipe->frame_number); 1655 } 1656 1657 /* Emulate a VD1 interrupt for BT.656 mode, as we can't stop the CCDC in 1658 * the VD1 interrupt handler in that mode without risking a CCDC stall 1659 * if a short frame is received. 1660 */ 1661 if (ccdc->bt656) { 1662 spin_lock_irqsave(&ccdc->lock, flags); 1663 if (ccdc->state == ISP_PIPELINE_STREAM_CONTINUOUS && 1664 ccdc->output & CCDC_OUTPUT_MEMORY) { 1665 if (ccdc->lsc.state != LSC_STATE_STOPPED) 1666 __ccdc_lsc_enable(ccdc, 0); 1667 __ccdc_enable(ccdc, 0); 1668 } 1669 ccdc_handle_stopping(ccdc, CCDC_EVENT_VD1); 1670 spin_unlock_irqrestore(&ccdc->lock, flags); 1671 } 1672 1673 spin_lock_irqsave(&ccdc->lock, flags); 1674 if (ccdc_handle_stopping(ccdc, CCDC_EVENT_VD0)) { 1675 spin_unlock_irqrestore(&ccdc->lock, flags); 1676 return; 1677 } 1678 1679 if (ccdc->output & CCDC_OUTPUT_MEMORY) 1680 restart = ccdc_isr_buffer(ccdc); 1681 1682 if (!ccdc->shadow_update) 1683 ccdc_apply_controls(ccdc); 1684 spin_unlock_irqrestore(&ccdc->lock, flags); 1685 1686 if (restart) 1687 ccdc_enable(ccdc); 1688 } 1689 1690 /* 1691 * ccdc_vd1_isr - Handle VD1 event 1692 * @ccdc: Pointer to ISP CCDC device. 1693 */ 1694 static void ccdc_vd1_isr(struct isp_ccdc_device *ccdc) 1695 { 1696 unsigned long flags; 1697 1698 /* In BT.656 mode the synchronization signals are generated by the CCDC 1699 * from the embedded sync codes. The VD0 and VD1 interrupts are thus 1700 * only triggered when the CCDC is enabled, unlike external sync mode 1701 * where the line counter runs even when the CCDC is stopped. We can't 1702 * disable the CCDC at VD1 time, as no VD0 interrupt would be generated 1703 * for a short frame, which would result in the CCDC being stopped and 1704 * no VD interrupt generated anymore. The CCDC is stopped from the VD0 1705 * interrupt handler instead for BT.656. 1706 */ 1707 if (ccdc->bt656) 1708 return; 1709 1710 spin_lock_irqsave(&ccdc->lsc.req_lock, flags); 1711 1712 /* 1713 * Depending on the CCDC pipeline state, CCDC stopping should be 1714 * handled differently. In SINGLESHOT we emulate an internal CCDC 1715 * stopping because the CCDC hw works only in continuous mode. 1716 * When CONTINUOUS pipeline state is used and the CCDC writes it's 1717 * data to memory the CCDC and LSC are stopped immediately but 1718 * without change the CCDC stopping state machine. The CCDC 1719 * stopping state machine should be used only when user request 1720 * for stopping is received (SINGLESHOT is an exception). 1721 */ 1722 switch (ccdc->state) { 1723 case ISP_PIPELINE_STREAM_SINGLESHOT: 1724 ccdc->stopping = CCDC_STOP_REQUEST; 1725 break; 1726 1727 case ISP_PIPELINE_STREAM_CONTINUOUS: 1728 if (ccdc->output & CCDC_OUTPUT_MEMORY) { 1729 if (ccdc->lsc.state != LSC_STATE_STOPPED) 1730 __ccdc_lsc_enable(ccdc, 0); 1731 __ccdc_enable(ccdc, 0); 1732 } 1733 break; 1734 1735 case ISP_PIPELINE_STREAM_STOPPED: 1736 break; 1737 } 1738 1739 if (ccdc_handle_stopping(ccdc, CCDC_EVENT_VD1)) 1740 goto done; 1741 1742 if (ccdc->lsc.request == NULL) 1743 goto done; 1744 1745 /* 1746 * LSC need to be reconfigured. Stop it here and on next LSC_DONE IRQ 1747 * do the appropriate changes in registers 1748 */ 1749 if (ccdc->lsc.state == LSC_STATE_RUNNING) { 1750 __ccdc_lsc_enable(ccdc, 0); 1751 ccdc->lsc.state = LSC_STATE_RECONFIG; 1752 goto done; 1753 } 1754 1755 /* LSC has been in STOPPED state, enable it */ 1756 if (ccdc->lsc.state == LSC_STATE_STOPPED) 1757 ccdc_lsc_enable(ccdc); 1758 1759 done: 1760 spin_unlock_irqrestore(&ccdc->lsc.req_lock, flags); 1761 } 1762 1763 /* 1764 * omap3isp_ccdc_isr - Configure CCDC during interframe time. 1765 * @ccdc: Pointer to ISP CCDC device. 1766 * @events: CCDC events 1767 */ 1768 int omap3isp_ccdc_isr(struct isp_ccdc_device *ccdc, u32 events) 1769 { 1770 if (ccdc->state == ISP_PIPELINE_STREAM_STOPPED) 1771 return 0; 1772 1773 if (events & IRQ0STATUS_CCDC_VD1_IRQ) 1774 ccdc_vd1_isr(ccdc); 1775 1776 ccdc_lsc_isr(ccdc, events); 1777 1778 if (events & IRQ0STATUS_CCDC_VD0_IRQ) 1779 ccdc_vd0_isr(ccdc); 1780 1781 if (events & IRQ0STATUS_HS_VS_IRQ) 1782 ccdc_hs_vs_isr(ccdc); 1783 1784 return 0; 1785 } 1786 1787 /* ----------------------------------------------------------------------------- 1788 * ISP video operations 1789 */ 1790 1791 static int ccdc_video_queue(struct isp_video *video, struct isp_buffer *buffer) 1792 { 1793 struct isp_ccdc_device *ccdc = &video->isp->isp_ccdc; 1794 unsigned long flags; 1795 bool restart = false; 1796 1797 if (!(ccdc->output & CCDC_OUTPUT_MEMORY)) 1798 return -ENODEV; 1799 1800 ccdc_set_outaddr(ccdc, buffer->dma); 1801 1802 /* We now have a buffer queued on the output, restart the pipeline 1803 * on the next CCDC interrupt if running in continuous mode (or when 1804 * starting the stream) in external sync mode, or immediately in BT.656 1805 * sync mode as no CCDC interrupt is generated when the CCDC is stopped 1806 * in that case. 1807 */ 1808 spin_lock_irqsave(&ccdc->lock, flags); 1809 if (ccdc->state == ISP_PIPELINE_STREAM_CONTINUOUS && !ccdc->running && 1810 ccdc->bt656) 1811 restart = true; 1812 else 1813 ccdc->underrun = 1; 1814 spin_unlock_irqrestore(&ccdc->lock, flags); 1815 1816 if (restart) 1817 ccdc_enable(ccdc); 1818 1819 return 0; 1820 } 1821 1822 static const struct isp_video_operations ccdc_video_ops = { 1823 .queue = ccdc_video_queue, 1824 }; 1825 1826 /* ----------------------------------------------------------------------------- 1827 * V4L2 subdev operations 1828 */ 1829 1830 /* 1831 * ccdc_ioctl - CCDC module private ioctl's 1832 * @sd: ISP CCDC V4L2 subdevice 1833 * @cmd: ioctl command 1834 * @arg: ioctl argument 1835 * 1836 * Return 0 on success or a negative error code otherwise. 1837 */ 1838 static long ccdc_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) 1839 { 1840 struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); 1841 int ret; 1842 1843 switch (cmd) { 1844 case VIDIOC_OMAP3ISP_CCDC_CFG: 1845 mutex_lock(&ccdc->ioctl_lock); 1846 ret = ccdc_config(ccdc, arg); 1847 mutex_unlock(&ccdc->ioctl_lock); 1848 break; 1849 1850 default: 1851 return -ENOIOCTLCMD; 1852 } 1853 1854 return ret; 1855 } 1856 1857 static int ccdc_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, 1858 struct v4l2_event_subscription *sub) 1859 { 1860 if (sub->type != V4L2_EVENT_FRAME_SYNC) 1861 return -EINVAL; 1862 1863 /* line number is zero at frame start */ 1864 if (sub->id != 0) 1865 return -EINVAL; 1866 1867 return v4l2_event_subscribe(fh, sub, OMAP3ISP_CCDC_NEVENTS, NULL); 1868 } 1869 1870 static int ccdc_unsubscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, 1871 struct v4l2_event_subscription *sub) 1872 { 1873 return v4l2_event_unsubscribe(fh, sub); 1874 } 1875 1876 /* 1877 * ccdc_set_stream - Enable/Disable streaming on the CCDC module 1878 * @sd: ISP CCDC V4L2 subdevice 1879 * @enable: Enable/disable stream 1880 * 1881 * When writing to memory, the CCDC hardware can't be enabled without a memory 1882 * buffer to write to. As the s_stream operation is called in response to a 1883 * STREAMON call without any buffer queued yet, just update the enabled field 1884 * and return immediately. The CCDC will be enabled in ccdc_isr_buffer(). 1885 * 1886 * When not writing to memory enable the CCDC immediately. 1887 */ 1888 static int ccdc_set_stream(struct v4l2_subdev *sd, int enable) 1889 { 1890 struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); 1891 struct isp_device *isp = to_isp_device(ccdc); 1892 int ret = 0; 1893 1894 if (ccdc->state == ISP_PIPELINE_STREAM_STOPPED) { 1895 if (enable == ISP_PIPELINE_STREAM_STOPPED) 1896 return 0; 1897 1898 omap3isp_subclk_enable(isp, OMAP3_ISP_SUBCLK_CCDC); 1899 isp_reg_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_CFG, 1900 ISPCCDC_CFG_VDLC); 1901 1902 ccdc_configure(ccdc); 1903 1904 ccdc_print_status(ccdc); 1905 } 1906 1907 switch (enable) { 1908 case ISP_PIPELINE_STREAM_CONTINUOUS: 1909 if (ccdc->output & CCDC_OUTPUT_MEMORY) 1910 omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CCDC_WRITE); 1911 1912 if (ccdc->underrun || !(ccdc->output & CCDC_OUTPUT_MEMORY)) 1913 ccdc_enable(ccdc); 1914 1915 ccdc->underrun = 0; 1916 break; 1917 1918 case ISP_PIPELINE_STREAM_SINGLESHOT: 1919 if (ccdc->output & CCDC_OUTPUT_MEMORY && 1920 ccdc->state != ISP_PIPELINE_STREAM_SINGLESHOT) 1921 omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CCDC_WRITE); 1922 1923 ccdc_enable(ccdc); 1924 break; 1925 1926 case ISP_PIPELINE_STREAM_STOPPED: 1927 ret = ccdc_disable(ccdc); 1928 if (ccdc->output & CCDC_OUTPUT_MEMORY) 1929 omap3isp_sbl_disable(isp, OMAP3_ISP_SBL_CCDC_WRITE); 1930 omap3isp_subclk_disable(isp, OMAP3_ISP_SUBCLK_CCDC); 1931 ccdc->underrun = 0; 1932 break; 1933 } 1934 1935 ccdc->state = enable; 1936 return ret; 1937 } 1938 1939 static struct v4l2_mbus_framefmt * 1940 __ccdc_get_format(struct isp_ccdc_device *ccdc, 1941 struct v4l2_subdev_state *sd_state, 1942 unsigned int pad, enum v4l2_subdev_format_whence which) 1943 { 1944 if (which == V4L2_SUBDEV_FORMAT_TRY) 1945 return v4l2_subdev_get_try_format(&ccdc->subdev, sd_state, 1946 pad); 1947 else 1948 return &ccdc->formats[pad]; 1949 } 1950 1951 static struct v4l2_rect * 1952 __ccdc_get_crop(struct isp_ccdc_device *ccdc, 1953 struct v4l2_subdev_state *sd_state, 1954 enum v4l2_subdev_format_whence which) 1955 { 1956 if (which == V4L2_SUBDEV_FORMAT_TRY) 1957 return v4l2_subdev_get_try_crop(&ccdc->subdev, sd_state, 1958 CCDC_PAD_SOURCE_OF); 1959 else 1960 return &ccdc->crop; 1961 } 1962 1963 /* 1964 * ccdc_try_format - Try video format on a pad 1965 * @ccdc: ISP CCDC device 1966 * @cfg : V4L2 subdev pad configuration 1967 * @pad: Pad number 1968 * @fmt: Format 1969 */ 1970 static void 1971 ccdc_try_format(struct isp_ccdc_device *ccdc, 1972 struct v4l2_subdev_state *sd_state, 1973 unsigned int pad, struct v4l2_mbus_framefmt *fmt, 1974 enum v4l2_subdev_format_whence which) 1975 { 1976 const struct isp_format_info *info; 1977 u32 pixelcode; 1978 unsigned int width = fmt->width; 1979 unsigned int height = fmt->height; 1980 struct v4l2_rect *crop; 1981 enum v4l2_field field; 1982 unsigned int i; 1983 1984 switch (pad) { 1985 case CCDC_PAD_SINK: 1986 for (i = 0; i < ARRAY_SIZE(ccdc_fmts); i++) { 1987 if (fmt->code == ccdc_fmts[i]) 1988 break; 1989 } 1990 1991 /* If not found, use SGRBG10 as default */ 1992 if (i >= ARRAY_SIZE(ccdc_fmts)) 1993 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; 1994 1995 /* Clamp the input size. */ 1996 fmt->width = clamp_t(u32, width, 32, 4096); 1997 fmt->height = clamp_t(u32, height, 32, 4096); 1998 1999 /* Default to progressive field order. */ 2000 if (fmt->field == V4L2_FIELD_ANY) 2001 fmt->field = V4L2_FIELD_NONE; 2002 2003 break; 2004 2005 case CCDC_PAD_SOURCE_OF: 2006 pixelcode = fmt->code; 2007 field = fmt->field; 2008 *fmt = *__ccdc_get_format(ccdc, sd_state, CCDC_PAD_SINK, 2009 which); 2010 2011 /* In SYNC mode the bridge converts YUV formats from 2X8 to 2012 * 1X16. In BT.656 no such conversion occurs. As we don't know 2013 * at this point whether the source will use SYNC or BT.656 mode 2014 * let's pretend the conversion always occurs. The CCDC will be 2015 * configured to pack bytes in BT.656, hiding the inaccuracy. 2016 * In all cases bytes can be swapped. 2017 */ 2018 if (fmt->code == MEDIA_BUS_FMT_YUYV8_2X8 || 2019 fmt->code == MEDIA_BUS_FMT_UYVY8_2X8) { 2020 /* Use the user requested format if YUV. */ 2021 if (pixelcode == MEDIA_BUS_FMT_YUYV8_2X8 || 2022 pixelcode == MEDIA_BUS_FMT_UYVY8_2X8 || 2023 pixelcode == MEDIA_BUS_FMT_YUYV8_1X16 || 2024 pixelcode == MEDIA_BUS_FMT_UYVY8_1X16) 2025 fmt->code = pixelcode; 2026 2027 if (fmt->code == MEDIA_BUS_FMT_YUYV8_2X8) 2028 fmt->code = MEDIA_BUS_FMT_YUYV8_1X16; 2029 else if (fmt->code == MEDIA_BUS_FMT_UYVY8_2X8) 2030 fmt->code = MEDIA_BUS_FMT_UYVY8_1X16; 2031 } 2032 2033 /* Hardcode the output size to the crop rectangle size. */ 2034 crop = __ccdc_get_crop(ccdc, sd_state, which); 2035 fmt->width = crop->width; 2036 fmt->height = crop->height; 2037 2038 /* When input format is interlaced with alternating fields the 2039 * CCDC can interleave the fields. 2040 */ 2041 if (fmt->field == V4L2_FIELD_ALTERNATE && 2042 (field == V4L2_FIELD_INTERLACED_TB || 2043 field == V4L2_FIELD_INTERLACED_BT)) { 2044 fmt->field = field; 2045 fmt->height *= 2; 2046 } 2047 2048 break; 2049 2050 case CCDC_PAD_SOURCE_VP: 2051 *fmt = *__ccdc_get_format(ccdc, sd_state, CCDC_PAD_SINK, 2052 which); 2053 2054 /* The video port interface truncates the data to 10 bits. */ 2055 info = omap3isp_video_format_info(fmt->code); 2056 fmt->code = info->truncated; 2057 2058 /* YUV formats are not supported by the video port. */ 2059 if (fmt->code == MEDIA_BUS_FMT_YUYV8_2X8 || 2060 fmt->code == MEDIA_BUS_FMT_UYVY8_2X8) 2061 fmt->code = 0; 2062 2063 /* The number of lines that can be clocked out from the video 2064 * port output must be at least one line less than the number 2065 * of input lines. 2066 */ 2067 fmt->width = clamp_t(u32, width, 32, fmt->width); 2068 fmt->height = clamp_t(u32, height, 32, fmt->height - 1); 2069 break; 2070 } 2071 2072 /* Data is written to memory unpacked, each 10-bit or 12-bit pixel is 2073 * stored on 2 bytes. 2074 */ 2075 fmt->colorspace = V4L2_COLORSPACE_SRGB; 2076 } 2077 2078 /* 2079 * ccdc_try_crop - Validate a crop rectangle 2080 * @ccdc: ISP CCDC device 2081 * @sink: format on the sink pad 2082 * @crop: crop rectangle to be validated 2083 */ 2084 static void ccdc_try_crop(struct isp_ccdc_device *ccdc, 2085 const struct v4l2_mbus_framefmt *sink, 2086 struct v4l2_rect *crop) 2087 { 2088 const struct isp_format_info *info; 2089 unsigned int max_width; 2090 2091 /* For Bayer formats, restrict left/top and width/height to even values 2092 * to keep the Bayer pattern. 2093 */ 2094 info = omap3isp_video_format_info(sink->code); 2095 if (info->flavor != MEDIA_BUS_FMT_Y8_1X8) { 2096 crop->left &= ~1; 2097 crop->top &= ~1; 2098 } 2099 2100 crop->left = clamp_t(u32, crop->left, 0, sink->width - CCDC_MIN_WIDTH); 2101 crop->top = clamp_t(u32, crop->top, 0, sink->height - CCDC_MIN_HEIGHT); 2102 2103 /* The data formatter truncates the number of horizontal output pixels 2104 * to a multiple of 16. To avoid clipping data, allow callers to request 2105 * an output size bigger than the input size up to the nearest multiple 2106 * of 16. 2107 */ 2108 max_width = (sink->width - crop->left + 15) & ~15; 2109 crop->width = clamp_t(u32, crop->width, CCDC_MIN_WIDTH, max_width) 2110 & ~15; 2111 crop->height = clamp_t(u32, crop->height, CCDC_MIN_HEIGHT, 2112 sink->height - crop->top); 2113 2114 /* Odd width/height values don't make sense for Bayer formats. */ 2115 if (info->flavor != MEDIA_BUS_FMT_Y8_1X8) { 2116 crop->width &= ~1; 2117 crop->height &= ~1; 2118 } 2119 } 2120 2121 /* 2122 * ccdc_enum_mbus_code - Handle pixel format enumeration 2123 * @sd : pointer to v4l2 subdev structure 2124 * @cfg : V4L2 subdev pad configuration 2125 * @code : pointer to v4l2_subdev_mbus_code_enum structure 2126 * return -EINVAL or zero on success 2127 */ 2128 static int ccdc_enum_mbus_code(struct v4l2_subdev *sd, 2129 struct v4l2_subdev_state *sd_state, 2130 struct v4l2_subdev_mbus_code_enum *code) 2131 { 2132 struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); 2133 struct v4l2_mbus_framefmt *format; 2134 2135 switch (code->pad) { 2136 case CCDC_PAD_SINK: 2137 if (code->index >= ARRAY_SIZE(ccdc_fmts)) 2138 return -EINVAL; 2139 2140 code->code = ccdc_fmts[code->index]; 2141 break; 2142 2143 case CCDC_PAD_SOURCE_OF: 2144 format = __ccdc_get_format(ccdc, sd_state, code->pad, 2145 code->which); 2146 2147 if (format->code == MEDIA_BUS_FMT_YUYV8_2X8 || 2148 format->code == MEDIA_BUS_FMT_UYVY8_2X8) { 2149 /* In YUV mode the CCDC can swap bytes. */ 2150 if (code->index == 0) 2151 code->code = MEDIA_BUS_FMT_YUYV8_1X16; 2152 else if (code->index == 1) 2153 code->code = MEDIA_BUS_FMT_UYVY8_1X16; 2154 else 2155 return -EINVAL; 2156 } else { 2157 /* In raw mode, no configurable format confversion is 2158 * available. 2159 */ 2160 if (code->index == 0) 2161 code->code = format->code; 2162 else 2163 return -EINVAL; 2164 } 2165 break; 2166 2167 case CCDC_PAD_SOURCE_VP: 2168 /* The CCDC supports no configurable format conversion 2169 * compatible with the video port. Enumerate a single output 2170 * format code. 2171 */ 2172 if (code->index != 0) 2173 return -EINVAL; 2174 2175 format = __ccdc_get_format(ccdc, sd_state, code->pad, 2176 code->which); 2177 2178 /* A pixel code equal to 0 means that the video port doesn't 2179 * support the input format. Don't enumerate any pixel code. 2180 */ 2181 if (format->code == 0) 2182 return -EINVAL; 2183 2184 code->code = format->code; 2185 break; 2186 2187 default: 2188 return -EINVAL; 2189 } 2190 2191 return 0; 2192 } 2193 2194 static int ccdc_enum_frame_size(struct v4l2_subdev *sd, 2195 struct v4l2_subdev_state *sd_state, 2196 struct v4l2_subdev_frame_size_enum *fse) 2197 { 2198 struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); 2199 struct v4l2_mbus_framefmt format; 2200 2201 if (fse->index != 0) 2202 return -EINVAL; 2203 2204 format.code = fse->code; 2205 format.width = 1; 2206 format.height = 1; 2207 ccdc_try_format(ccdc, sd_state, fse->pad, &format, fse->which); 2208 fse->min_width = format.width; 2209 fse->min_height = format.height; 2210 2211 if (format.code != fse->code) 2212 return -EINVAL; 2213 2214 format.code = fse->code; 2215 format.width = -1; 2216 format.height = -1; 2217 ccdc_try_format(ccdc, sd_state, fse->pad, &format, fse->which); 2218 fse->max_width = format.width; 2219 fse->max_height = format.height; 2220 2221 return 0; 2222 } 2223 2224 /* 2225 * ccdc_get_selection - Retrieve a selection rectangle on a pad 2226 * @sd: ISP CCDC V4L2 subdevice 2227 * @cfg: V4L2 subdev pad configuration 2228 * @sel: Selection rectangle 2229 * 2230 * The only supported rectangles are the crop rectangles on the output formatter 2231 * source pad. 2232 * 2233 * Return 0 on success or a negative error code otherwise. 2234 */ 2235 static int ccdc_get_selection(struct v4l2_subdev *sd, 2236 struct v4l2_subdev_state *sd_state, 2237 struct v4l2_subdev_selection *sel) 2238 { 2239 struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); 2240 struct v4l2_mbus_framefmt *format; 2241 2242 if (sel->pad != CCDC_PAD_SOURCE_OF) 2243 return -EINVAL; 2244 2245 switch (sel->target) { 2246 case V4L2_SEL_TGT_CROP_BOUNDS: 2247 sel->r.left = 0; 2248 sel->r.top = 0; 2249 sel->r.width = INT_MAX; 2250 sel->r.height = INT_MAX; 2251 2252 format = __ccdc_get_format(ccdc, sd_state, CCDC_PAD_SINK, 2253 sel->which); 2254 ccdc_try_crop(ccdc, format, &sel->r); 2255 break; 2256 2257 case V4L2_SEL_TGT_CROP: 2258 sel->r = *__ccdc_get_crop(ccdc, sd_state, sel->which); 2259 break; 2260 2261 default: 2262 return -EINVAL; 2263 } 2264 2265 return 0; 2266 } 2267 2268 /* 2269 * ccdc_set_selection - Set a selection rectangle on a pad 2270 * @sd: ISP CCDC V4L2 subdevice 2271 * @cfg: V4L2 subdev pad configuration 2272 * @sel: Selection rectangle 2273 * 2274 * The only supported rectangle is the actual crop rectangle on the output 2275 * formatter source pad. 2276 * 2277 * Return 0 on success or a negative error code otherwise. 2278 */ 2279 static int ccdc_set_selection(struct v4l2_subdev *sd, 2280 struct v4l2_subdev_state *sd_state, 2281 struct v4l2_subdev_selection *sel) 2282 { 2283 struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); 2284 struct v4l2_mbus_framefmt *format; 2285 2286 if (sel->target != V4L2_SEL_TGT_CROP || 2287 sel->pad != CCDC_PAD_SOURCE_OF) 2288 return -EINVAL; 2289 2290 /* The crop rectangle can't be changed while streaming. */ 2291 if (ccdc->state != ISP_PIPELINE_STREAM_STOPPED) 2292 return -EBUSY; 2293 2294 /* Modifying the crop rectangle always changes the format on the source 2295 * pad. If the KEEP_CONFIG flag is set, just return the current crop 2296 * rectangle. 2297 */ 2298 if (sel->flags & V4L2_SEL_FLAG_KEEP_CONFIG) { 2299 sel->r = *__ccdc_get_crop(ccdc, sd_state, sel->which); 2300 return 0; 2301 } 2302 2303 format = __ccdc_get_format(ccdc, sd_state, CCDC_PAD_SINK, sel->which); 2304 ccdc_try_crop(ccdc, format, &sel->r); 2305 *__ccdc_get_crop(ccdc, sd_state, sel->which) = sel->r; 2306 2307 /* Update the source format. */ 2308 format = __ccdc_get_format(ccdc, sd_state, CCDC_PAD_SOURCE_OF, 2309 sel->which); 2310 ccdc_try_format(ccdc, sd_state, CCDC_PAD_SOURCE_OF, format, 2311 sel->which); 2312 2313 return 0; 2314 } 2315 2316 /* 2317 * ccdc_get_format - Retrieve the video format on a pad 2318 * @sd : ISP CCDC V4L2 subdevice 2319 * @cfg: V4L2 subdev pad configuration 2320 * @fmt: Format 2321 * 2322 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond 2323 * to the format type. 2324 */ 2325 static int ccdc_get_format(struct v4l2_subdev *sd, 2326 struct v4l2_subdev_state *sd_state, 2327 struct v4l2_subdev_format *fmt) 2328 { 2329 struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); 2330 struct v4l2_mbus_framefmt *format; 2331 2332 format = __ccdc_get_format(ccdc, sd_state, fmt->pad, fmt->which); 2333 if (format == NULL) 2334 return -EINVAL; 2335 2336 fmt->format = *format; 2337 return 0; 2338 } 2339 2340 /* 2341 * ccdc_set_format - Set the video format on a pad 2342 * @sd : ISP CCDC V4L2 subdevice 2343 * @cfg: V4L2 subdev pad configuration 2344 * @fmt: Format 2345 * 2346 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond 2347 * to the format type. 2348 */ 2349 static int ccdc_set_format(struct v4l2_subdev *sd, 2350 struct v4l2_subdev_state *sd_state, 2351 struct v4l2_subdev_format *fmt) 2352 { 2353 struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); 2354 struct v4l2_mbus_framefmt *format; 2355 struct v4l2_rect *crop; 2356 2357 format = __ccdc_get_format(ccdc, sd_state, fmt->pad, fmt->which); 2358 if (format == NULL) 2359 return -EINVAL; 2360 2361 ccdc_try_format(ccdc, sd_state, fmt->pad, &fmt->format, fmt->which); 2362 *format = fmt->format; 2363 2364 /* Propagate the format from sink to source */ 2365 if (fmt->pad == CCDC_PAD_SINK) { 2366 /* Reset the crop rectangle. */ 2367 crop = __ccdc_get_crop(ccdc, sd_state, fmt->which); 2368 crop->left = 0; 2369 crop->top = 0; 2370 crop->width = fmt->format.width; 2371 crop->height = fmt->format.height; 2372 2373 ccdc_try_crop(ccdc, &fmt->format, crop); 2374 2375 /* Update the source formats. */ 2376 format = __ccdc_get_format(ccdc, sd_state, CCDC_PAD_SOURCE_OF, 2377 fmt->which); 2378 *format = fmt->format; 2379 ccdc_try_format(ccdc, sd_state, CCDC_PAD_SOURCE_OF, format, 2380 fmt->which); 2381 2382 format = __ccdc_get_format(ccdc, sd_state, CCDC_PAD_SOURCE_VP, 2383 fmt->which); 2384 *format = fmt->format; 2385 ccdc_try_format(ccdc, sd_state, CCDC_PAD_SOURCE_VP, format, 2386 fmt->which); 2387 } 2388 2389 return 0; 2390 } 2391 2392 /* 2393 * Decide whether desired output pixel code can be obtained with 2394 * the lane shifter by shifting the input pixel code. 2395 * @in: input pixelcode to shifter 2396 * @out: output pixelcode from shifter 2397 * @additional_shift: # of bits the sensor's LSB is offset from CAMEXT[0] 2398 * 2399 * return true if the combination is possible 2400 * return false otherwise 2401 */ 2402 static bool ccdc_is_shiftable(u32 in, u32 out, unsigned int additional_shift) 2403 { 2404 const struct isp_format_info *in_info, *out_info; 2405 2406 if (in == out) 2407 return true; 2408 2409 in_info = omap3isp_video_format_info(in); 2410 out_info = omap3isp_video_format_info(out); 2411 2412 if ((in_info->flavor == 0) || (out_info->flavor == 0)) 2413 return false; 2414 2415 if (in_info->flavor != out_info->flavor) 2416 return false; 2417 2418 return in_info->width - out_info->width + additional_shift <= 6; 2419 } 2420 2421 static int ccdc_link_validate(struct v4l2_subdev *sd, 2422 struct media_link *link, 2423 struct v4l2_subdev_format *source_fmt, 2424 struct v4l2_subdev_format *sink_fmt) 2425 { 2426 struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); 2427 unsigned long parallel_shift; 2428 2429 /* Check if the two ends match */ 2430 if (source_fmt->format.width != sink_fmt->format.width || 2431 source_fmt->format.height != sink_fmt->format.height) 2432 return -EPIPE; 2433 2434 /* We've got a parallel sensor here. */ 2435 if (ccdc->input == CCDC_INPUT_PARALLEL) { 2436 struct v4l2_subdev *sd = 2437 media_entity_to_v4l2_subdev(link->source->entity); 2438 struct isp_bus_cfg *bus_cfg = v4l2_subdev_to_bus_cfg(sd); 2439 2440 parallel_shift = bus_cfg->bus.parallel.data_lane_shift; 2441 } else { 2442 parallel_shift = 0; 2443 } 2444 2445 /* Lane shifter may be used to drop bits on CCDC sink pad */ 2446 if (!ccdc_is_shiftable(source_fmt->format.code, 2447 sink_fmt->format.code, parallel_shift)) 2448 return -EPIPE; 2449 2450 return 0; 2451 } 2452 2453 /* 2454 * ccdc_init_formats - Initialize formats on all pads 2455 * @sd: ISP CCDC V4L2 subdevice 2456 * @fh: V4L2 subdev file handle 2457 * 2458 * Initialize all pad formats with default values. If fh is not NULL, try 2459 * formats are initialized on the file handle. Otherwise active formats are 2460 * initialized on the device. 2461 */ 2462 static int ccdc_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) 2463 { 2464 struct v4l2_subdev_format format; 2465 2466 memset(&format, 0, sizeof(format)); 2467 format.pad = CCDC_PAD_SINK; 2468 format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; 2469 format.format.code = MEDIA_BUS_FMT_SGRBG10_1X10; 2470 format.format.width = 4096; 2471 format.format.height = 4096; 2472 ccdc_set_format(sd, fh ? fh->state : NULL, &format); 2473 2474 return 0; 2475 } 2476 2477 /* V4L2 subdev core operations */ 2478 static const struct v4l2_subdev_core_ops ccdc_v4l2_core_ops = { 2479 .ioctl = ccdc_ioctl, 2480 .subscribe_event = ccdc_subscribe_event, 2481 .unsubscribe_event = ccdc_unsubscribe_event, 2482 }; 2483 2484 /* V4L2 subdev video operations */ 2485 static const struct v4l2_subdev_video_ops ccdc_v4l2_video_ops = { 2486 .s_stream = ccdc_set_stream, 2487 }; 2488 2489 /* V4L2 subdev pad operations */ 2490 static const struct v4l2_subdev_pad_ops ccdc_v4l2_pad_ops = { 2491 .enum_mbus_code = ccdc_enum_mbus_code, 2492 .enum_frame_size = ccdc_enum_frame_size, 2493 .get_fmt = ccdc_get_format, 2494 .set_fmt = ccdc_set_format, 2495 .get_selection = ccdc_get_selection, 2496 .set_selection = ccdc_set_selection, 2497 .link_validate = ccdc_link_validate, 2498 }; 2499 2500 /* V4L2 subdev operations */ 2501 static const struct v4l2_subdev_ops ccdc_v4l2_ops = { 2502 .core = &ccdc_v4l2_core_ops, 2503 .video = &ccdc_v4l2_video_ops, 2504 .pad = &ccdc_v4l2_pad_ops, 2505 }; 2506 2507 /* V4L2 subdev internal operations */ 2508 static const struct v4l2_subdev_internal_ops ccdc_v4l2_internal_ops = { 2509 .open = ccdc_init_formats, 2510 }; 2511 2512 /* ----------------------------------------------------------------------------- 2513 * Media entity operations 2514 */ 2515 2516 /* 2517 * ccdc_link_setup - Setup CCDC connections 2518 * @entity: CCDC media entity 2519 * @local: Pad at the local end of the link 2520 * @remote: Pad at the remote end of the link 2521 * @flags: Link flags 2522 * 2523 * return -EINVAL or zero on success 2524 */ 2525 static int ccdc_link_setup(struct media_entity *entity, 2526 const struct media_pad *local, 2527 const struct media_pad *remote, u32 flags) 2528 { 2529 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); 2530 struct isp_ccdc_device *ccdc = v4l2_get_subdevdata(sd); 2531 struct isp_device *isp = to_isp_device(ccdc); 2532 unsigned int index = local->index; 2533 2534 /* FIXME: this is actually a hack! */ 2535 if (is_media_entity_v4l2_subdev(remote->entity)) 2536 index |= 2 << 16; 2537 2538 switch (index) { 2539 case CCDC_PAD_SINK | 2 << 16: 2540 /* Read from the sensor (parallel interface), CCP2, CSI2a or 2541 * CSI2c. 2542 */ 2543 if (!(flags & MEDIA_LNK_FL_ENABLED)) { 2544 ccdc->input = CCDC_INPUT_NONE; 2545 break; 2546 } 2547 2548 if (ccdc->input != CCDC_INPUT_NONE) 2549 return -EBUSY; 2550 2551 if (remote->entity == &isp->isp_ccp2.subdev.entity) 2552 ccdc->input = CCDC_INPUT_CCP2B; 2553 else if (remote->entity == &isp->isp_csi2a.subdev.entity) 2554 ccdc->input = CCDC_INPUT_CSI2A; 2555 else if (remote->entity == &isp->isp_csi2c.subdev.entity) 2556 ccdc->input = CCDC_INPUT_CSI2C; 2557 else 2558 ccdc->input = CCDC_INPUT_PARALLEL; 2559 2560 break; 2561 2562 /* 2563 * The ISP core doesn't support pipelines with multiple video outputs. 2564 * Revisit this when it will be implemented, and return -EBUSY for now. 2565 */ 2566 2567 case CCDC_PAD_SOURCE_VP | 2 << 16: 2568 /* Write to preview engine, histogram and H3A. When none of 2569 * those links are active, the video port can be disabled. 2570 */ 2571 if (flags & MEDIA_LNK_FL_ENABLED) { 2572 if (ccdc->output & ~CCDC_OUTPUT_PREVIEW) 2573 return -EBUSY; 2574 ccdc->output |= CCDC_OUTPUT_PREVIEW; 2575 } else { 2576 ccdc->output &= ~CCDC_OUTPUT_PREVIEW; 2577 } 2578 break; 2579 2580 case CCDC_PAD_SOURCE_OF: 2581 /* Write to memory */ 2582 if (flags & MEDIA_LNK_FL_ENABLED) { 2583 if (ccdc->output & ~CCDC_OUTPUT_MEMORY) 2584 return -EBUSY; 2585 ccdc->output |= CCDC_OUTPUT_MEMORY; 2586 } else { 2587 ccdc->output &= ~CCDC_OUTPUT_MEMORY; 2588 } 2589 break; 2590 2591 case CCDC_PAD_SOURCE_OF | 2 << 16: 2592 /* Write to resizer */ 2593 if (flags & MEDIA_LNK_FL_ENABLED) { 2594 if (ccdc->output & ~CCDC_OUTPUT_RESIZER) 2595 return -EBUSY; 2596 ccdc->output |= CCDC_OUTPUT_RESIZER; 2597 } else { 2598 ccdc->output &= ~CCDC_OUTPUT_RESIZER; 2599 } 2600 break; 2601 2602 default: 2603 return -EINVAL; 2604 } 2605 2606 return 0; 2607 } 2608 2609 /* media operations */ 2610 static const struct media_entity_operations ccdc_media_ops = { 2611 .link_setup = ccdc_link_setup, 2612 .link_validate = v4l2_subdev_link_validate, 2613 }; 2614 2615 void omap3isp_ccdc_unregister_entities(struct isp_ccdc_device *ccdc) 2616 { 2617 v4l2_device_unregister_subdev(&ccdc->subdev); 2618 omap3isp_video_unregister(&ccdc->video_out); 2619 } 2620 2621 int omap3isp_ccdc_register_entities(struct isp_ccdc_device *ccdc, 2622 struct v4l2_device *vdev) 2623 { 2624 int ret; 2625 2626 /* Register the subdev and video node. */ 2627 ccdc->subdev.dev = vdev->mdev->dev; 2628 ret = v4l2_device_register_subdev(vdev, &ccdc->subdev); 2629 if (ret < 0) 2630 goto error; 2631 2632 ret = omap3isp_video_register(&ccdc->video_out, vdev); 2633 if (ret < 0) 2634 goto error; 2635 2636 return 0; 2637 2638 error: 2639 omap3isp_ccdc_unregister_entities(ccdc); 2640 return ret; 2641 } 2642 2643 /* ----------------------------------------------------------------------------- 2644 * ISP CCDC initialisation and cleanup 2645 */ 2646 2647 /* 2648 * ccdc_init_entities - Initialize V4L2 subdev and media entity 2649 * @ccdc: ISP CCDC module 2650 * 2651 * Return 0 on success and a negative error code on failure. 2652 */ 2653 static int ccdc_init_entities(struct isp_ccdc_device *ccdc) 2654 { 2655 struct v4l2_subdev *sd = &ccdc->subdev; 2656 struct media_pad *pads = ccdc->pads; 2657 struct media_entity *me = &sd->entity; 2658 int ret; 2659 2660 ccdc->input = CCDC_INPUT_NONE; 2661 2662 v4l2_subdev_init(sd, &ccdc_v4l2_ops); 2663 sd->internal_ops = &ccdc_v4l2_internal_ops; 2664 strscpy(sd->name, "OMAP3 ISP CCDC", sizeof(sd->name)); 2665 sd->grp_id = 1 << 16; /* group ID for isp subdevs */ 2666 v4l2_set_subdevdata(sd, ccdc); 2667 sd->flags |= V4L2_SUBDEV_FL_HAS_EVENTS | V4L2_SUBDEV_FL_HAS_DEVNODE; 2668 2669 pads[CCDC_PAD_SINK].flags = MEDIA_PAD_FL_SINK 2670 | MEDIA_PAD_FL_MUST_CONNECT; 2671 pads[CCDC_PAD_SOURCE_VP].flags = MEDIA_PAD_FL_SOURCE; 2672 pads[CCDC_PAD_SOURCE_OF].flags = MEDIA_PAD_FL_SOURCE; 2673 2674 me->ops = &ccdc_media_ops; 2675 ret = media_entity_pads_init(me, CCDC_PADS_NUM, pads); 2676 if (ret < 0) 2677 return ret; 2678 2679 ccdc_init_formats(sd, NULL); 2680 2681 ccdc->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2682 ccdc->video_out.ops = &ccdc_video_ops; 2683 ccdc->video_out.isp = to_isp_device(ccdc); 2684 ccdc->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 3; 2685 ccdc->video_out.bpl_alignment = 32; 2686 2687 ret = omap3isp_video_init(&ccdc->video_out, "CCDC"); 2688 if (ret < 0) 2689 goto error; 2690 2691 return 0; 2692 2693 error: 2694 media_entity_cleanup(me); 2695 return ret; 2696 } 2697 2698 /* 2699 * omap3isp_ccdc_init - CCDC module initialization. 2700 * @isp: Device pointer specific to the OMAP3 ISP. 2701 * 2702 * TODO: Get the initialisation values from platform data. 2703 * 2704 * Return 0 on success or a negative error code otherwise. 2705 */ 2706 int omap3isp_ccdc_init(struct isp_device *isp) 2707 { 2708 struct isp_ccdc_device *ccdc = &isp->isp_ccdc; 2709 int ret; 2710 2711 spin_lock_init(&ccdc->lock); 2712 init_waitqueue_head(&ccdc->wait); 2713 mutex_init(&ccdc->ioctl_lock); 2714 2715 ccdc->stopping = CCDC_STOP_NOT_REQUESTED; 2716 2717 INIT_WORK(&ccdc->lsc.table_work, ccdc_lsc_free_table_work); 2718 ccdc->lsc.state = LSC_STATE_STOPPED; 2719 INIT_LIST_HEAD(&ccdc->lsc.free_queue); 2720 spin_lock_init(&ccdc->lsc.req_lock); 2721 2722 ccdc->clamp.oblen = 0; 2723 ccdc->clamp.dcsubval = 0; 2724 2725 ccdc->update = OMAP3ISP_CCDC_BLCLAMP; 2726 ccdc_apply_controls(ccdc); 2727 2728 ret = ccdc_init_entities(ccdc); 2729 if (ret < 0) { 2730 mutex_destroy(&ccdc->ioctl_lock); 2731 return ret; 2732 } 2733 2734 return 0; 2735 } 2736 2737 /* 2738 * omap3isp_ccdc_cleanup - CCDC module cleanup. 2739 * @isp: Device pointer specific to the OMAP3 ISP. 2740 */ 2741 void omap3isp_ccdc_cleanup(struct isp_device *isp) 2742 { 2743 struct isp_ccdc_device *ccdc = &isp->isp_ccdc; 2744 2745 omap3isp_video_cleanup(&ccdc->video_out); 2746 media_entity_cleanup(&ccdc->subdev.entity); 2747 2748 /* Free LSC requests. As the CCDC is stopped there's no active request, 2749 * so only the pending request and the free queue need to be handled. 2750 */ 2751 ccdc_lsc_free_request(ccdc, ccdc->lsc.request); 2752 cancel_work_sync(&ccdc->lsc.table_work); 2753 ccdc_lsc_free_queue(ccdc, &ccdc->lsc.free_queue); 2754 2755 if (ccdc->fpc.addr != NULL) 2756 dma_free_coherent(isp->dev, ccdc->fpc.fpnum * 4, ccdc->fpc.addr, 2757 ccdc->fpc.dma); 2758 2759 mutex_destroy(&ccdc->ioctl_lock); 2760 } 2761