1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * TI OMAP4 ISS V4L2 Driver - ISP IPIPE module 4 * 5 * Copyright (C) 2012 Texas Instruments, Inc. 6 * 7 * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com> 8 */ 9 10#include <linux/module.h> 11#include <linux/uaccess.h> 12#include <linux/delay.h> 13#include <linux/device.h> 14#include <linux/dma-mapping.h> 15#include <linux/mm.h> 16#include <linux/sched.h> 17 18#include "iss.h" 19#include "iss_regs.h" 20#include "iss_ipipe.h" 21 22static struct v4l2_mbus_framefmt * 23__ipipe_get_format(struct iss_ipipe_device *ipipe, 24 struct v4l2_subdev_state *sd_state, 25 unsigned int pad, 26 enum v4l2_subdev_format_whence which); 27 28static const unsigned int ipipe_fmts[] = { 29 MEDIA_BUS_FMT_SGRBG10_1X10, 30 MEDIA_BUS_FMT_SRGGB10_1X10, 31 MEDIA_BUS_FMT_SBGGR10_1X10, 32 MEDIA_BUS_FMT_SGBRG10_1X10, 33}; 34 35/* 36 * ipipe_print_status - Print current IPIPE Module register values. 37 * @ipipe: Pointer to ISS ISP IPIPE device. 38 * 39 * Also prints other debug information stored in the IPIPE module. 40 */ 41#define IPIPE_PRINT_REGISTER(iss, name)\ 42 dev_dbg(iss->dev, "###IPIPE " #name "=0x%08x\n", \ 43 iss_reg_read(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_##name)) 44 45static void ipipe_print_status(struct iss_ipipe_device *ipipe) 46{ 47 struct iss_device *iss = to_iss_device(ipipe); 48 49 dev_dbg(iss->dev, "-------------IPIPE Register dump-------------\n"); 50 51 IPIPE_PRINT_REGISTER(iss, SRC_EN); 52 IPIPE_PRINT_REGISTER(iss, SRC_MODE); 53 IPIPE_PRINT_REGISTER(iss, SRC_FMT); 54 IPIPE_PRINT_REGISTER(iss, SRC_COL); 55 IPIPE_PRINT_REGISTER(iss, SRC_VPS); 56 IPIPE_PRINT_REGISTER(iss, SRC_VSZ); 57 IPIPE_PRINT_REGISTER(iss, SRC_HPS); 58 IPIPE_PRINT_REGISTER(iss, SRC_HSZ); 59 IPIPE_PRINT_REGISTER(iss, GCK_MMR); 60 IPIPE_PRINT_REGISTER(iss, YUV_PHS); 61 62 dev_dbg(iss->dev, "-----------------------------------------------\n"); 63} 64 65/* 66 * ipipe_enable - Enable/Disable IPIPE. 67 * @enable: enable flag 68 * 69 */ 70static void ipipe_enable(struct iss_ipipe_device *ipipe, u8 enable) 71{ 72 struct iss_device *iss = to_iss_device(ipipe); 73 74 iss_reg_update(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_EN, 75 IPIPE_SRC_EN_EN, enable ? IPIPE_SRC_EN_EN : 0); 76} 77 78/* ----------------------------------------------------------------------------- 79 * Format- and pipeline-related configuration helpers 80 */ 81 82static void ipipe_configure(struct iss_ipipe_device *ipipe) 83{ 84 struct iss_device *iss = to_iss_device(ipipe); 85 struct v4l2_mbus_framefmt *format; 86 87 /* IPIPE_PAD_SINK */ 88 format = &ipipe->formats[IPIPE_PAD_SINK]; 89 90 /* NOTE: Currently just supporting pipeline IN: RGB, OUT: YUV422 */ 91 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_FMT, 92 IPIPE_SRC_FMT_RAW2YUV); 93 94 /* Enable YUV444 -> YUV422 conversion */ 95 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_YUV_PHS, 96 IPIPE_YUV_PHS_LPF); 97 98 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_VPS, 0); 99 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_HPS, 0); 100 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_VSZ, 101 (format->height - 2) & IPIPE_SRC_VSZ_MASK); 102 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_HSZ, 103 (format->width - 1) & IPIPE_SRC_HSZ_MASK); 104 105 /* Ignore ipipeif_wrt signal, and operate on-the-fly. */ 106 iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_MODE, 107 IPIPE_SRC_MODE_WRT | IPIPE_SRC_MODE_OST); 108 109 /* HACK: Values tuned for Ducati SW (OV) */ 110 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_COL, 111 IPIPE_SRC_COL_EE_B | IPIPE_SRC_COL_EO_GB | 112 IPIPE_SRC_COL_OE_GR | IPIPE_SRC_COL_OO_R); 113 114 /* IPIPE_PAD_SOURCE_VP */ 115 format = &ipipe->formats[IPIPE_PAD_SOURCE_VP]; 116 /* Do nothing? */ 117} 118 119/* ----------------------------------------------------------------------------- 120 * V4L2 subdev operations 121 */ 122 123/* 124 * ipipe_set_stream - Enable/Disable streaming on the IPIPE module 125 * @sd: ISP IPIPE V4L2 subdevice 126 * @enable: Enable/disable stream 127 */ 128static int ipipe_set_stream(struct v4l2_subdev *sd, int enable) 129{ 130 struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd); 131 struct iss_device *iss = to_iss_device(ipipe); 132 int ret = 0; 133 134 if (ipipe->state == ISS_PIPELINE_STREAM_STOPPED) { 135 if (enable == ISS_PIPELINE_STREAM_STOPPED) 136 return 0; 137 138 omap4iss_isp_subclk_enable(iss, OMAP4_ISS_ISP_SUBCLK_IPIPE); 139 140 /* Enable clk_arm_g0 */ 141 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_GCK_MMR, 142 IPIPE_GCK_MMR_REG); 143 144 /* Enable clk_pix_g[3:0] */ 145 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_GCK_PIX, 146 IPIPE_GCK_PIX_G3 | IPIPE_GCK_PIX_G2 | 147 IPIPE_GCK_PIX_G1 | IPIPE_GCK_PIX_G0); 148 } 149 150 switch (enable) { 151 case ISS_PIPELINE_STREAM_CONTINUOUS: 152 153 ipipe_configure(ipipe); 154 ipipe_print_status(ipipe); 155 156 atomic_set(&ipipe->stopping, 0); 157 ipipe_enable(ipipe, 1); 158 break; 159 160 case ISS_PIPELINE_STREAM_STOPPED: 161 if (ipipe->state == ISS_PIPELINE_STREAM_STOPPED) 162 return 0; 163 if (omap4iss_module_sync_idle(&sd->entity, &ipipe->wait, 164 &ipipe->stopping)) 165 ret = -ETIMEDOUT; 166 167 ipipe_enable(ipipe, 0); 168 omap4iss_isp_subclk_disable(iss, OMAP4_ISS_ISP_SUBCLK_IPIPE); 169 break; 170 } 171 172 ipipe->state = enable; 173 return ret; 174} 175 176static struct v4l2_mbus_framefmt * 177__ipipe_get_format(struct iss_ipipe_device *ipipe, 178 struct v4l2_subdev_state *sd_state, 179 unsigned int pad, 180 enum v4l2_subdev_format_whence which) 181{ 182 if (which == V4L2_SUBDEV_FORMAT_TRY) 183 return v4l2_subdev_state_get_format(sd_state, pad); 184 185 return &ipipe->formats[pad]; 186} 187 188/* 189 * ipipe_try_format - Try video format on a pad 190 * @ipipe: ISS IPIPE device 191 * @sd_state: V4L2 subdev state 192 * @pad: Pad number 193 * @fmt: Format 194 */ 195static void 196ipipe_try_format(struct iss_ipipe_device *ipipe, 197 struct v4l2_subdev_state *sd_state, 198 unsigned int pad, 199 struct v4l2_mbus_framefmt *fmt, 200 enum v4l2_subdev_format_whence which) 201{ 202 struct v4l2_mbus_framefmt *format; 203 unsigned int width = fmt->width; 204 unsigned int height = fmt->height; 205 unsigned int i; 206 207 switch (pad) { 208 case IPIPE_PAD_SINK: 209 for (i = 0; i < ARRAY_SIZE(ipipe_fmts); i++) { 210 if (fmt->code == ipipe_fmts[i]) 211 break; 212 } 213 214 /* If not found, use SGRBG10 as default */ 215 if (i >= ARRAY_SIZE(ipipe_fmts)) 216 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; 217 218 /* Clamp the input size. */ 219 fmt->width = clamp_t(u32, width, 1, 8192); 220 fmt->height = clamp_t(u32, height, 1, 8192); 221 fmt->colorspace = V4L2_COLORSPACE_SRGB; 222 break; 223 224 case IPIPE_PAD_SOURCE_VP: 225 format = __ipipe_get_format(ipipe, sd_state, IPIPE_PAD_SINK, 226 which); 227 memcpy(fmt, format, sizeof(*fmt)); 228 229 fmt->code = MEDIA_BUS_FMT_UYVY8_1X16; 230 fmt->width = clamp_t(u32, width, 32, fmt->width); 231 fmt->height = clamp_t(u32, height, 32, fmt->height); 232 fmt->colorspace = V4L2_COLORSPACE_JPEG; 233 break; 234 } 235 236 fmt->field = V4L2_FIELD_NONE; 237} 238 239/* 240 * ipipe_enum_mbus_code - Handle pixel format enumeration 241 * @sd : pointer to v4l2 subdev structure 242 * @sd_state: V4L2 subdev state 243 * @code : pointer to v4l2_subdev_mbus_code_enum structure 244 * return -EINVAL or zero on success 245 */ 246static int ipipe_enum_mbus_code(struct v4l2_subdev *sd, 247 struct v4l2_subdev_state *sd_state, 248 struct v4l2_subdev_mbus_code_enum *code) 249{ 250 switch (code->pad) { 251 case IPIPE_PAD_SINK: 252 if (code->index >= ARRAY_SIZE(ipipe_fmts)) 253 return -EINVAL; 254 255 code->code = ipipe_fmts[code->index]; 256 break; 257 258 case IPIPE_PAD_SOURCE_VP: 259 /* FIXME: Forced format conversion inside IPIPE ? */ 260 if (code->index != 0) 261 return -EINVAL; 262 263 code->code = MEDIA_BUS_FMT_UYVY8_1X16; 264 break; 265 266 default: 267 return -EINVAL; 268 } 269 270 return 0; 271} 272 273static int ipipe_enum_frame_size(struct v4l2_subdev *sd, 274 struct v4l2_subdev_state *sd_state, 275 struct v4l2_subdev_frame_size_enum *fse) 276{ 277 struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd); 278 struct v4l2_mbus_framefmt format; 279 280 if (fse->index != 0) 281 return -EINVAL; 282 283 format.code = fse->code; 284 format.width = 1; 285 format.height = 1; 286 ipipe_try_format(ipipe, sd_state, fse->pad, &format, fse->which); 287 fse->min_width = format.width; 288 fse->min_height = format.height; 289 290 if (format.code != fse->code) 291 return -EINVAL; 292 293 format.code = fse->code; 294 format.width = -1; 295 format.height = -1; 296 ipipe_try_format(ipipe, sd_state, fse->pad, &format, fse->which); 297 fse->max_width = format.width; 298 fse->max_height = format.height; 299 300 return 0; 301} 302 303/* 304 * ipipe_get_format - Retrieve the video format on a pad 305 * @sd : ISP IPIPE V4L2 subdevice 306 * @sd_state: V4L2 subdev state 307 * @fmt: Format 308 * 309 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond 310 * to the format type. 311 */ 312static int ipipe_get_format(struct v4l2_subdev *sd, 313 struct v4l2_subdev_state *sd_state, 314 struct v4l2_subdev_format *fmt) 315{ 316 struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd); 317 struct v4l2_mbus_framefmt *format; 318 319 format = __ipipe_get_format(ipipe, sd_state, fmt->pad, fmt->which); 320 if (!format) 321 return -EINVAL; 322 323 fmt->format = *format; 324 return 0; 325} 326 327/* 328 * ipipe_set_format - Set the video format on a pad 329 * @sd : ISP IPIPE V4L2 subdevice 330 * @sd_state: V4L2 subdev state 331 * @fmt: Format 332 * 333 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond 334 * to the format type. 335 */ 336static int ipipe_set_format(struct v4l2_subdev *sd, 337 struct v4l2_subdev_state *sd_state, 338 struct v4l2_subdev_format *fmt) 339{ 340 struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd); 341 struct v4l2_mbus_framefmt *format; 342 343 format = __ipipe_get_format(ipipe, sd_state, fmt->pad, fmt->which); 344 if (!format) 345 return -EINVAL; 346 347 ipipe_try_format(ipipe, sd_state, fmt->pad, &fmt->format, fmt->which); 348 *format = fmt->format; 349 350 /* Propagate the format from sink to source */ 351 if (fmt->pad == IPIPE_PAD_SINK) { 352 format = __ipipe_get_format(ipipe, sd_state, 353 IPIPE_PAD_SOURCE_VP, 354 fmt->which); 355 *format = fmt->format; 356 ipipe_try_format(ipipe, sd_state, IPIPE_PAD_SOURCE_VP, format, 357 fmt->which); 358 } 359 360 return 0; 361} 362 363static int ipipe_link_validate(struct v4l2_subdev *sd, struct media_link *link, 364 struct v4l2_subdev_format *source_fmt, 365 struct v4l2_subdev_format *sink_fmt) 366{ 367 /* Check if the two ends match */ 368 if (source_fmt->format.width != sink_fmt->format.width || 369 source_fmt->format.height != sink_fmt->format.height) 370 return -EPIPE; 371 372 if (source_fmt->format.code != sink_fmt->format.code) 373 return -EPIPE; 374 375 return 0; 376} 377 378/* 379 * ipipe_init_formats - Initialize formats on all pads 380 * @sd: ISP IPIPE V4L2 subdevice 381 * @fh: V4L2 subdev file handle 382 * 383 * Initialize all pad formats with default values. If fh is not NULL, try 384 * formats are initialized on the file handle. Otherwise active formats are 385 * initialized on the device. 386 */ 387static int ipipe_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) 388{ 389 struct v4l2_subdev_format format; 390 391 memset(&format, 0, sizeof(format)); 392 format.pad = IPIPE_PAD_SINK; 393 format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; 394 format.format.code = MEDIA_BUS_FMT_SGRBG10_1X10; 395 format.format.width = 4096; 396 format.format.height = 4096; 397 ipipe_set_format(sd, fh ? fh->state : NULL, &format); 398 399 return 0; 400} 401 402/* V4L2 subdev video operations */ 403static const struct v4l2_subdev_video_ops ipipe_v4l2_video_ops = { 404 .s_stream = ipipe_set_stream, 405}; 406 407/* V4L2 subdev pad operations */ 408static const struct v4l2_subdev_pad_ops ipipe_v4l2_pad_ops = { 409 .enum_mbus_code = ipipe_enum_mbus_code, 410 .enum_frame_size = ipipe_enum_frame_size, 411 .get_fmt = ipipe_get_format, 412 .set_fmt = ipipe_set_format, 413 .link_validate = ipipe_link_validate, 414}; 415 416/* V4L2 subdev operations */ 417static const struct v4l2_subdev_ops ipipe_v4l2_ops = { 418 .video = &ipipe_v4l2_video_ops, 419 .pad = &ipipe_v4l2_pad_ops, 420}; 421 422/* V4L2 subdev internal operations */ 423static const struct v4l2_subdev_internal_ops ipipe_v4l2_internal_ops = { 424 .open = ipipe_init_formats, 425}; 426 427/* ----------------------------------------------------------------------------- 428 * Media entity operations 429 */ 430 431/* 432 * ipipe_link_setup - Setup IPIPE connections 433 * @entity: IPIPE media entity 434 * @local: Pad at the local end of the link 435 * @remote: Pad at the remote end of the link 436 * @flags: Link flags 437 * 438 * return -EINVAL or zero on success 439 */ 440static int ipipe_link_setup(struct media_entity *entity, 441 const struct media_pad *local, 442 const struct media_pad *remote, u32 flags) 443{ 444 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); 445 struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd); 446 struct iss_device *iss = to_iss_device(ipipe); 447 448 if (!is_media_entity_v4l2_subdev(remote->entity)) 449 return -EINVAL; 450 451 switch (local->index) { 452 case IPIPE_PAD_SINK: 453 /* Read from IPIPEIF. */ 454 if (!(flags & MEDIA_LNK_FL_ENABLED)) { 455 ipipe->input = IPIPE_INPUT_NONE; 456 break; 457 } 458 459 if (ipipe->input != IPIPE_INPUT_NONE) 460 return -EBUSY; 461 462 if (remote->entity == &iss->ipipeif.subdev.entity) 463 ipipe->input = IPIPE_INPUT_IPIPEIF; 464 465 break; 466 467 case IPIPE_PAD_SOURCE_VP: 468 /* Send to RESIZER */ 469 if (flags & MEDIA_LNK_FL_ENABLED) { 470 if (ipipe->output & ~IPIPE_OUTPUT_VP) 471 return -EBUSY; 472 ipipe->output |= IPIPE_OUTPUT_VP; 473 } else { 474 ipipe->output &= ~IPIPE_OUTPUT_VP; 475 } 476 break; 477 478 default: 479 return -EINVAL; 480 } 481 482 return 0; 483} 484 485/* media operations */ 486static const struct media_entity_operations ipipe_media_ops = { 487 .link_setup = ipipe_link_setup, 488 .link_validate = v4l2_subdev_link_validate, 489}; 490 491/* 492 * ipipe_init_entities - Initialize V4L2 subdev and media entity 493 * @ipipe: ISS ISP IPIPE module 494 * 495 * Return 0 on success and a negative error code on failure. 496 */ 497static int ipipe_init_entities(struct iss_ipipe_device *ipipe) 498{ 499 struct v4l2_subdev *sd = &ipipe->subdev; 500 struct media_pad *pads = ipipe->pads; 501 struct media_entity *me = &sd->entity; 502 int ret; 503 504 ipipe->input = IPIPE_INPUT_NONE; 505 506 v4l2_subdev_init(sd, &ipipe_v4l2_ops); 507 sd->internal_ops = &ipipe_v4l2_internal_ops; 508 strscpy(sd->name, "OMAP4 ISS ISP IPIPE", sizeof(sd->name)); 509 sd->grp_id = BIT(16); /* group ID for iss subdevs */ 510 v4l2_set_subdevdata(sd, ipipe); 511 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 512 513 pads[IPIPE_PAD_SINK].flags = MEDIA_PAD_FL_SINK; 514 pads[IPIPE_PAD_SOURCE_VP].flags = MEDIA_PAD_FL_SOURCE; 515 516 me->ops = &ipipe_media_ops; 517 ret = media_entity_pads_init(me, IPIPE_PADS_NUM, pads); 518 if (ret < 0) 519 return ret; 520 521 ipipe_init_formats(sd, NULL); 522 523 return 0; 524} 525 526void omap4iss_ipipe_unregister_entities(struct iss_ipipe_device *ipipe) 527{ 528 v4l2_device_unregister_subdev(&ipipe->subdev); 529} 530 531int omap4iss_ipipe_register_entities(struct iss_ipipe_device *ipipe, 532 struct v4l2_device *vdev) 533{ 534 int ret; 535 536 /* Register the subdev and video node. */ 537 ret = v4l2_device_register_subdev(vdev, &ipipe->subdev); 538 if (ret < 0) 539 goto error; 540 541 return 0; 542 543error: 544 omap4iss_ipipe_unregister_entities(ipipe); 545 return ret; 546} 547 548/* ----------------------------------------------------------------------------- 549 * ISP IPIPE initialisation and cleanup 550 */ 551 552/* 553 * omap4iss_ipipe_init - IPIPE module initialization. 554 * @iss: Device pointer specific to the OMAP4 ISS. 555 * 556 * TODO: Get the initialisation values from platform data. 557 * 558 * Return 0 on success or a negative error code otherwise. 559 */ 560int omap4iss_ipipe_init(struct iss_device *iss) 561{ 562 struct iss_ipipe_device *ipipe = &iss->ipipe; 563 564 ipipe->state = ISS_PIPELINE_STREAM_STOPPED; 565 init_waitqueue_head(&ipipe->wait); 566 567 return ipipe_init_entities(ipipe); 568} 569 570/* 571 * omap4iss_ipipe_cleanup - IPIPE module cleanup. 572 * @iss: Device pointer specific to the OMAP4 ISS. 573 */ 574void omap4iss_ipipe_cleanup(struct iss_device *iss) 575{ 576 struct iss_ipipe_device *ipipe = &iss->ipipe; 577 578 media_entity_cleanup(&ipipe->subdev.entity); 579} 580