1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * TI OMAP4 ISS V4L2 Driver - ISP RESIZER 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_resizer.h" 21 22 static const unsigned int resizer_fmts[] = { 23 MEDIA_BUS_FMT_UYVY8_1X16, 24 MEDIA_BUS_FMT_YUYV8_1X16, 25 }; 26 27 /* 28 * resizer_print_status - Print current RESIZER Module register values. 29 * @resizer: Pointer to ISS ISP RESIZER device. 30 * 31 * Also prints other debug information stored in the RESIZER module. 32 */ 33 #define RSZ_PRINT_REGISTER(iss, name)\ 34 dev_dbg(iss->dev, "###RSZ " #name "=0x%08x\n", \ 35 iss_reg_read(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_##name)) 36 37 #define RZA_PRINT_REGISTER(iss, name)\ 38 dev_dbg(iss->dev, "###RZA " #name "=0x%08x\n", \ 39 iss_reg_read(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_##name)) 40 41 static void resizer_print_status(struct iss_resizer_device *resizer) 42 { 43 struct iss_device *iss = to_iss_device(resizer); 44 45 dev_dbg(iss->dev, "-------------RESIZER Register dump-------------\n"); 46 47 RSZ_PRINT_REGISTER(iss, SYSCONFIG); 48 RSZ_PRINT_REGISTER(iss, IN_FIFO_CTRL); 49 RSZ_PRINT_REGISTER(iss, FRACDIV); 50 RSZ_PRINT_REGISTER(iss, SRC_EN); 51 RSZ_PRINT_REGISTER(iss, SRC_MODE); 52 RSZ_PRINT_REGISTER(iss, SRC_FMT0); 53 RSZ_PRINT_REGISTER(iss, SRC_FMT1); 54 RSZ_PRINT_REGISTER(iss, SRC_VPS); 55 RSZ_PRINT_REGISTER(iss, SRC_VSZ); 56 RSZ_PRINT_REGISTER(iss, SRC_HPS); 57 RSZ_PRINT_REGISTER(iss, SRC_HSZ); 58 RSZ_PRINT_REGISTER(iss, DMA_RZA); 59 RSZ_PRINT_REGISTER(iss, DMA_RZB); 60 RSZ_PRINT_REGISTER(iss, DMA_STA); 61 RSZ_PRINT_REGISTER(iss, GCK_MMR); 62 RSZ_PRINT_REGISTER(iss, GCK_SDR); 63 RSZ_PRINT_REGISTER(iss, IRQ_RZA); 64 RSZ_PRINT_REGISTER(iss, IRQ_RZB); 65 RSZ_PRINT_REGISTER(iss, YUV_Y_MIN); 66 RSZ_PRINT_REGISTER(iss, YUV_Y_MAX); 67 RSZ_PRINT_REGISTER(iss, YUV_C_MIN); 68 RSZ_PRINT_REGISTER(iss, YUV_C_MAX); 69 RSZ_PRINT_REGISTER(iss, SEQ); 70 71 RZA_PRINT_REGISTER(iss, EN); 72 RZA_PRINT_REGISTER(iss, MODE); 73 RZA_PRINT_REGISTER(iss, 420); 74 RZA_PRINT_REGISTER(iss, I_VPS); 75 RZA_PRINT_REGISTER(iss, I_HPS); 76 RZA_PRINT_REGISTER(iss, O_VSZ); 77 RZA_PRINT_REGISTER(iss, O_HSZ); 78 RZA_PRINT_REGISTER(iss, V_PHS_Y); 79 RZA_PRINT_REGISTER(iss, V_PHS_C); 80 RZA_PRINT_REGISTER(iss, V_DIF); 81 RZA_PRINT_REGISTER(iss, V_TYP); 82 RZA_PRINT_REGISTER(iss, V_LPF); 83 RZA_PRINT_REGISTER(iss, H_PHS); 84 RZA_PRINT_REGISTER(iss, H_DIF); 85 RZA_PRINT_REGISTER(iss, H_TYP); 86 RZA_PRINT_REGISTER(iss, H_LPF); 87 RZA_PRINT_REGISTER(iss, DWN_EN); 88 RZA_PRINT_REGISTER(iss, SDR_Y_BAD_H); 89 RZA_PRINT_REGISTER(iss, SDR_Y_BAD_L); 90 RZA_PRINT_REGISTER(iss, SDR_Y_SAD_H); 91 RZA_PRINT_REGISTER(iss, SDR_Y_SAD_L); 92 RZA_PRINT_REGISTER(iss, SDR_Y_OFT); 93 RZA_PRINT_REGISTER(iss, SDR_Y_PTR_S); 94 RZA_PRINT_REGISTER(iss, SDR_Y_PTR_E); 95 RZA_PRINT_REGISTER(iss, SDR_C_BAD_H); 96 RZA_PRINT_REGISTER(iss, SDR_C_BAD_L); 97 RZA_PRINT_REGISTER(iss, SDR_C_SAD_H); 98 RZA_PRINT_REGISTER(iss, SDR_C_SAD_L); 99 RZA_PRINT_REGISTER(iss, SDR_C_OFT); 100 RZA_PRINT_REGISTER(iss, SDR_C_PTR_S); 101 RZA_PRINT_REGISTER(iss, SDR_C_PTR_E); 102 103 dev_dbg(iss->dev, "-----------------------------------------------\n"); 104 } 105 106 /* 107 * resizer_enable - Enable/Disable RESIZER. 108 * @enable: enable flag 109 * 110 */ 111 static void resizer_enable(struct iss_resizer_device *resizer, u8 enable) 112 { 113 struct iss_device *iss = to_iss_device(resizer); 114 115 iss_reg_update(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_EN, 116 RSZ_SRC_EN_SRC_EN, enable ? RSZ_SRC_EN_SRC_EN : 0); 117 118 /* TODO: Enable RSZB */ 119 iss_reg_update(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_EN, RSZ_EN_EN, 120 enable ? RSZ_EN_EN : 0); 121 } 122 123 /* ----------------------------------------------------------------------------- 124 * Format- and pipeline-related configuration helpers 125 */ 126 127 /* 128 * resizer_set_outaddr - Set memory address to save output image 129 * @resizer: Pointer to ISP RESIZER device. 130 * @addr: 32-bit memory address aligned on 32 byte boundary. 131 * 132 * Sets the memory address where the output will be saved. 133 */ 134 static void resizer_set_outaddr(struct iss_resizer_device *resizer, u32 addr) 135 { 136 struct iss_device *iss = to_iss_device(resizer); 137 struct v4l2_mbus_framefmt *informat, *outformat; 138 139 informat = &resizer->formats[RESIZER_PAD_SINK]; 140 outformat = &resizer->formats[RESIZER_PAD_SOURCE_MEM]; 141 142 /* Save address split in Base Address H & L */ 143 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_BAD_H, 144 (addr >> 16) & 0xffff); 145 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_BAD_L, 146 addr & 0xffff); 147 148 /* SAD = BAD */ 149 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_SAD_H, 150 (addr >> 16) & 0xffff); 151 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_SAD_L, 152 addr & 0xffff); 153 154 /* Program UV buffer address... Hardcoded to be contiguous! */ 155 if ((informat->code == MEDIA_BUS_FMT_UYVY8_1X16) && 156 (outformat->code == MEDIA_BUS_FMT_YUYV8_1_5X8)) { 157 u32 c_addr = addr + resizer->video_out.bpl_value 158 * outformat->height; 159 160 /* Ensure Y_BAD_L[6:0] = C_BAD_L[6:0]*/ 161 if ((c_addr ^ addr) & 0x7f) { 162 c_addr &= ~0x7f; 163 c_addr += 0x80; 164 c_addr |= addr & 0x7f; 165 } 166 167 /* Save address split in Base Address H & L */ 168 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_BAD_H, 169 (c_addr >> 16) & 0xffff); 170 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_BAD_L, 171 c_addr & 0xffff); 172 173 /* SAD = BAD */ 174 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_SAD_H, 175 (c_addr >> 16) & 0xffff); 176 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_SAD_L, 177 c_addr & 0xffff); 178 } 179 } 180 181 static void resizer_configure(struct iss_resizer_device *resizer) 182 { 183 struct iss_device *iss = to_iss_device(resizer); 184 struct v4l2_mbus_framefmt *informat, *outformat; 185 186 informat = &resizer->formats[RESIZER_PAD_SINK]; 187 outformat = &resizer->formats[RESIZER_PAD_SOURCE_MEM]; 188 189 /* Disable pass-through more. Despite its name, the BYPASS bit controls 190 * pass-through mode, not bypass mode. 191 */ 192 iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_FMT0, 193 RSZ_SRC_FMT0_BYPASS); 194 195 /* Select RSZ input */ 196 iss_reg_update(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_FMT0, 197 RSZ_SRC_FMT0_SEL, 198 resizer->input == RESIZER_INPUT_IPIPEIF ? 199 RSZ_SRC_FMT0_SEL : 0); 200 201 /* RSZ ignores WEN signal from IPIPE/IPIPEIF */ 202 iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_MODE, 203 RSZ_SRC_MODE_WRT); 204 205 /* Set Resizer in free-running mode */ 206 iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_MODE, 207 RSZ_SRC_MODE_OST); 208 209 /* Init Resizer A */ 210 iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_MODE, 211 RZA_MODE_ONE_SHOT); 212 213 /* Set size related things now */ 214 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_VPS, 0); 215 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_HPS, 0); 216 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_VSZ, 217 informat->height - 2); 218 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SRC_HSZ, 219 informat->width - 1); 220 221 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_I_VPS, 0); 222 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_I_HPS, 0); 223 224 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_O_VSZ, 225 outformat->height - 2); 226 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_O_HSZ, 227 outformat->width - 1); 228 229 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_V_DIF, 0x100); 230 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_H_DIF, 0x100); 231 232 /* Buffer output settings */ 233 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_PTR_S, 0); 234 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_PTR_E, 235 outformat->height - 1); 236 237 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_Y_OFT, 238 resizer->video_out.bpl_value); 239 240 /* UYVY -> NV12 conversion */ 241 if ((informat->code == MEDIA_BUS_FMT_UYVY8_1X16) && 242 (outformat->code == MEDIA_BUS_FMT_YUYV8_1_5X8)) { 243 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_420, 244 RSZ_420_CEN | RSZ_420_YEN); 245 246 /* UV Buffer output settings */ 247 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_PTR_S, 248 0); 249 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_PTR_E, 250 outformat->height - 1); 251 252 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_SDR_C_OFT, 253 resizer->video_out.bpl_value); 254 } else { 255 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_RESIZER, RZA_420, 0); 256 } 257 } 258 259 /* ----------------------------------------------------------------------------- 260 * Interrupt handling 261 */ 262 263 static void resizer_isr_buffer(struct iss_resizer_device *resizer) 264 { 265 struct iss_buffer *buffer; 266 267 /* The whole resizer needs to be stopped. Disabling RZA only produces 268 * input FIFO overflows, most probably when the next frame is received. 269 */ 270 resizer_enable(resizer, 0); 271 272 buffer = omap4iss_video_buffer_next(&resizer->video_out); 273 if (!buffer) 274 return; 275 276 resizer_set_outaddr(resizer, buffer->iss_addr); 277 278 resizer_enable(resizer, 1); 279 } 280 281 /* 282 * omap4iss_resizer_isr - Configure resizer during interframe time. 283 * @resizer: Pointer to ISP RESIZER device. 284 * @events: RESIZER events 285 */ 286 void omap4iss_resizer_isr(struct iss_resizer_device *resizer, u32 events) 287 { 288 struct iss_device *iss = to_iss_device(resizer); 289 struct iss_pipeline *pipe = 290 to_iss_pipeline(&resizer->subdev.entity); 291 292 if (events & (ISP5_IRQ_RSZ_FIFO_IN_BLK_ERR | 293 ISP5_IRQ_RSZ_FIFO_OVF)) { 294 dev_dbg(iss->dev, "RSZ Err: FIFO_IN_BLK:%d, FIFO_OVF:%d\n", 295 events & ISP5_IRQ_RSZ_FIFO_IN_BLK_ERR ? 1 : 0, 296 events & ISP5_IRQ_RSZ_FIFO_OVF ? 1 : 0); 297 omap4iss_pipeline_cancel_stream(pipe); 298 } 299 300 if (omap4iss_module_sync_is_stopping(&resizer->wait, 301 &resizer->stopping)) 302 return; 303 304 if (events & ISP5_IRQ_RSZ_INT_DMA) 305 resizer_isr_buffer(resizer); 306 } 307 308 /* ----------------------------------------------------------------------------- 309 * ISS video operations 310 */ 311 312 static int resizer_video_queue(struct iss_video *video, 313 struct iss_buffer *buffer) 314 { 315 struct iss_resizer_device *resizer = container_of(video, 316 struct iss_resizer_device, video_out); 317 318 if (!(resizer->output & RESIZER_OUTPUT_MEMORY)) 319 return -ENODEV; 320 321 resizer_set_outaddr(resizer, buffer->iss_addr); 322 323 /* 324 * If streaming was enabled before there was a buffer queued 325 * or underrun happened in the ISR, the hardware was not enabled 326 * and DMA queue flag ISS_VIDEO_DMAQUEUE_UNDERRUN is still set. 327 * Enable it now. 328 */ 329 if (video->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_UNDERRUN) { 330 resizer_enable(resizer, 1); 331 iss_video_dmaqueue_flags_clr(video); 332 } 333 334 return 0; 335 } 336 337 static const struct iss_video_operations resizer_video_ops = { 338 .queue = resizer_video_queue, 339 }; 340 341 /* ----------------------------------------------------------------------------- 342 * V4L2 subdev operations 343 */ 344 345 /* 346 * resizer_set_stream - Enable/Disable streaming on the RESIZER module 347 * @sd: ISP RESIZER V4L2 subdevice 348 * @enable: Enable/disable stream 349 */ 350 static int resizer_set_stream(struct v4l2_subdev *sd, int enable) 351 { 352 struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd); 353 struct iss_device *iss = to_iss_device(resizer); 354 struct iss_video *video_out = &resizer->video_out; 355 int ret = 0; 356 357 if (resizer->state == ISS_PIPELINE_STREAM_STOPPED) { 358 if (enable == ISS_PIPELINE_STREAM_STOPPED) 359 return 0; 360 361 omap4iss_isp_subclk_enable(iss, OMAP4_ISS_ISP_SUBCLK_RSZ); 362 363 iss_reg_set(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_GCK_MMR, 364 RSZ_GCK_MMR_MMR); 365 iss_reg_set(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_GCK_SDR, 366 RSZ_GCK_SDR_CORE); 367 368 /* FIXME: Enable RSZB also */ 369 iss_reg_set(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SYSCONFIG, 370 RSZ_SYSCONFIG_RSZA_CLK_EN); 371 } 372 373 switch (enable) { 374 case ISS_PIPELINE_STREAM_CONTINUOUS: 375 376 resizer_configure(resizer); 377 resizer_print_status(resizer); 378 379 /* 380 * When outputting to memory with no buffer available, let the 381 * buffer queue handler start the hardware. A DMA queue flag 382 * ISS_VIDEO_DMAQUEUE_QUEUED will be set as soon as there is 383 * a buffer available. 384 */ 385 if (resizer->output & RESIZER_OUTPUT_MEMORY && 386 !(video_out->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_QUEUED)) 387 break; 388 389 atomic_set(&resizer->stopping, 0); 390 resizer_enable(resizer, 1); 391 iss_video_dmaqueue_flags_clr(video_out); 392 break; 393 394 case ISS_PIPELINE_STREAM_STOPPED: 395 if (resizer->state == ISS_PIPELINE_STREAM_STOPPED) 396 return 0; 397 if (omap4iss_module_sync_idle(&sd->entity, &resizer->wait, 398 &resizer->stopping)) 399 ret = -ETIMEDOUT; 400 401 resizer_enable(resizer, 0); 402 iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_SYSCONFIG, 403 RSZ_SYSCONFIG_RSZA_CLK_EN); 404 iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_GCK_SDR, 405 RSZ_GCK_SDR_CORE); 406 iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_RESIZER, RSZ_GCK_MMR, 407 RSZ_GCK_MMR_MMR); 408 omap4iss_isp_subclk_disable(iss, OMAP4_ISS_ISP_SUBCLK_RSZ); 409 iss_video_dmaqueue_flags_clr(video_out); 410 break; 411 } 412 413 resizer->state = enable; 414 return ret; 415 } 416 417 static struct v4l2_mbus_framefmt * 418 __resizer_get_format(struct iss_resizer_device *resizer, 419 struct v4l2_subdev_state *sd_state, unsigned int pad, 420 enum v4l2_subdev_format_whence which) 421 { 422 if (which == V4L2_SUBDEV_FORMAT_TRY) 423 return v4l2_subdev_get_try_format(&resizer->subdev, sd_state, 424 pad); 425 return &resizer->formats[pad]; 426 } 427 428 /* 429 * resizer_try_format - Try video format on a pad 430 * @resizer: ISS RESIZER device 431 * @cfg: V4L2 subdev pad config 432 * @pad: Pad number 433 * @fmt: Format 434 */ 435 static void 436 resizer_try_format(struct iss_resizer_device *resizer, 437 struct v4l2_subdev_state *sd_state, unsigned int pad, 438 struct v4l2_mbus_framefmt *fmt, 439 enum v4l2_subdev_format_whence which) 440 { 441 u32 pixelcode; 442 struct v4l2_mbus_framefmt *format; 443 unsigned int width = fmt->width; 444 unsigned int height = fmt->height; 445 unsigned int i; 446 447 switch (pad) { 448 case RESIZER_PAD_SINK: 449 for (i = 0; i < ARRAY_SIZE(resizer_fmts); i++) { 450 if (fmt->code == resizer_fmts[i]) 451 break; 452 } 453 454 /* If not found, use UYVY as default */ 455 if (i >= ARRAY_SIZE(resizer_fmts)) 456 fmt->code = MEDIA_BUS_FMT_UYVY8_1X16; 457 458 /* Clamp the input size. */ 459 fmt->width = clamp_t(u32, width, 1, 8192); 460 fmt->height = clamp_t(u32, height, 1, 8192); 461 break; 462 463 case RESIZER_PAD_SOURCE_MEM: 464 pixelcode = fmt->code; 465 format = __resizer_get_format(resizer, sd_state, 466 RESIZER_PAD_SINK, 467 which); 468 memcpy(fmt, format, sizeof(*fmt)); 469 470 if ((pixelcode == MEDIA_BUS_FMT_YUYV8_1_5X8) && 471 (fmt->code == MEDIA_BUS_FMT_UYVY8_1X16)) 472 fmt->code = pixelcode; 473 474 /* The data formatter truncates the number of horizontal output 475 * pixels to a multiple of 16. To avoid clipping data, allow 476 * callers to request an output size bigger than the input size 477 * up to the nearest multiple of 16. 478 */ 479 fmt->width = clamp_t(u32, width, 32, (fmt->width + 15) & ~15); 480 fmt->width &= ~15; 481 fmt->height = clamp_t(u32, height, 32, fmt->height); 482 break; 483 } 484 485 fmt->colorspace = V4L2_COLORSPACE_JPEG; 486 fmt->field = V4L2_FIELD_NONE; 487 } 488 489 /* 490 * resizer_enum_mbus_code - Handle pixel format enumeration 491 * @sd : pointer to v4l2 subdev structure 492 * @cfg: V4L2 subdev pad config 493 * @code : pointer to v4l2_subdev_mbus_code_enum structure 494 * return -EINVAL or zero on success 495 */ 496 static int resizer_enum_mbus_code(struct v4l2_subdev *sd, 497 struct v4l2_subdev_state *sd_state, 498 struct v4l2_subdev_mbus_code_enum *code) 499 { 500 struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd); 501 struct v4l2_mbus_framefmt *format; 502 503 switch (code->pad) { 504 case RESIZER_PAD_SINK: 505 if (code->index >= ARRAY_SIZE(resizer_fmts)) 506 return -EINVAL; 507 508 code->code = resizer_fmts[code->index]; 509 break; 510 511 case RESIZER_PAD_SOURCE_MEM: 512 format = __resizer_get_format(resizer, sd_state, 513 RESIZER_PAD_SINK, 514 code->which); 515 516 if (code->index == 0) { 517 code->code = format->code; 518 break; 519 } 520 521 switch (format->code) { 522 case MEDIA_BUS_FMT_UYVY8_1X16: 523 if (code->index == 1) 524 code->code = MEDIA_BUS_FMT_YUYV8_1_5X8; 525 else 526 return -EINVAL; 527 break; 528 default: 529 if (code->index != 0) 530 return -EINVAL; 531 } 532 533 break; 534 535 default: 536 return -EINVAL; 537 } 538 539 return 0; 540 } 541 542 static int resizer_enum_frame_size(struct v4l2_subdev *sd, 543 struct v4l2_subdev_state *sd_state, 544 struct v4l2_subdev_frame_size_enum *fse) 545 { 546 struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd); 547 struct v4l2_mbus_framefmt format; 548 549 if (fse->index != 0) 550 return -EINVAL; 551 552 format.code = fse->code; 553 format.width = 1; 554 format.height = 1; 555 resizer_try_format(resizer, sd_state, fse->pad, &format, fse->which); 556 fse->min_width = format.width; 557 fse->min_height = format.height; 558 559 if (format.code != fse->code) 560 return -EINVAL; 561 562 format.code = fse->code; 563 format.width = -1; 564 format.height = -1; 565 resizer_try_format(resizer, sd_state, fse->pad, &format, fse->which); 566 fse->max_width = format.width; 567 fse->max_height = format.height; 568 569 return 0; 570 } 571 572 /* 573 * resizer_get_format - Retrieve the video format on a pad 574 * @sd : ISP RESIZER V4L2 subdevice 575 * @cfg: V4L2 subdev pad config 576 * @fmt: Format 577 * 578 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond 579 * to the format type. 580 */ 581 static int resizer_get_format(struct v4l2_subdev *sd, 582 struct v4l2_subdev_state *sd_state, 583 struct v4l2_subdev_format *fmt) 584 { 585 struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd); 586 struct v4l2_mbus_framefmt *format; 587 588 format = __resizer_get_format(resizer, sd_state, fmt->pad, fmt->which); 589 if (!format) 590 return -EINVAL; 591 592 fmt->format = *format; 593 return 0; 594 } 595 596 /* 597 * resizer_set_format - Set the video format on a pad 598 * @sd : ISP RESIZER V4L2 subdevice 599 * @cfg: V4L2 subdev pad config 600 * @fmt: Format 601 * 602 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond 603 * to the format type. 604 */ 605 static int resizer_set_format(struct v4l2_subdev *sd, 606 struct v4l2_subdev_state *sd_state, 607 struct v4l2_subdev_format *fmt) 608 { 609 struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd); 610 struct v4l2_mbus_framefmt *format; 611 612 format = __resizer_get_format(resizer, sd_state, fmt->pad, fmt->which); 613 if (!format) 614 return -EINVAL; 615 616 resizer_try_format(resizer, sd_state, fmt->pad, &fmt->format, 617 fmt->which); 618 *format = fmt->format; 619 620 /* Propagate the format from sink to source */ 621 if (fmt->pad == RESIZER_PAD_SINK) { 622 format = __resizer_get_format(resizer, sd_state, 623 RESIZER_PAD_SOURCE_MEM, 624 fmt->which); 625 *format = fmt->format; 626 resizer_try_format(resizer, sd_state, RESIZER_PAD_SOURCE_MEM, 627 format, 628 fmt->which); 629 } 630 631 return 0; 632 } 633 634 static int resizer_link_validate(struct v4l2_subdev *sd, 635 struct media_link *link, 636 struct v4l2_subdev_format *source_fmt, 637 struct v4l2_subdev_format *sink_fmt) 638 { 639 /* Check if the two ends match */ 640 if (source_fmt->format.width != sink_fmt->format.width || 641 source_fmt->format.height != sink_fmt->format.height) 642 return -EPIPE; 643 644 if (source_fmt->format.code != sink_fmt->format.code) 645 return -EPIPE; 646 647 return 0; 648 } 649 650 /* 651 * resizer_init_formats - Initialize formats on all pads 652 * @sd: ISP RESIZER V4L2 subdevice 653 * @fh: V4L2 subdev file handle 654 * 655 * Initialize all pad formats with default values. If fh is not NULL, try 656 * formats are initialized on the file handle. Otherwise active formats are 657 * initialized on the device. 658 */ 659 static int resizer_init_formats(struct v4l2_subdev *sd, 660 struct v4l2_subdev_fh *fh) 661 { 662 struct v4l2_subdev_format format; 663 664 memset(&format, 0, sizeof(format)); 665 format.pad = RESIZER_PAD_SINK; 666 format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; 667 format.format.code = MEDIA_BUS_FMT_UYVY8_1X16; 668 format.format.width = 4096; 669 format.format.height = 4096; 670 resizer_set_format(sd, fh ? fh->state : NULL, &format); 671 672 return 0; 673 } 674 675 /* V4L2 subdev video operations */ 676 static const struct v4l2_subdev_video_ops resizer_v4l2_video_ops = { 677 .s_stream = resizer_set_stream, 678 }; 679 680 /* V4L2 subdev pad operations */ 681 static const struct v4l2_subdev_pad_ops resizer_v4l2_pad_ops = { 682 .enum_mbus_code = resizer_enum_mbus_code, 683 .enum_frame_size = resizer_enum_frame_size, 684 .get_fmt = resizer_get_format, 685 .set_fmt = resizer_set_format, 686 .link_validate = resizer_link_validate, 687 }; 688 689 /* V4L2 subdev operations */ 690 static const struct v4l2_subdev_ops resizer_v4l2_ops = { 691 .video = &resizer_v4l2_video_ops, 692 .pad = &resizer_v4l2_pad_ops, 693 }; 694 695 /* V4L2 subdev internal operations */ 696 static const struct v4l2_subdev_internal_ops resizer_v4l2_internal_ops = { 697 .open = resizer_init_formats, 698 }; 699 700 /* ----------------------------------------------------------------------------- 701 * Media entity operations 702 */ 703 704 /* 705 * resizer_link_setup - Setup RESIZER connections 706 * @entity: RESIZER media entity 707 * @local: Pad at the local end of the link 708 * @remote: Pad at the remote end of the link 709 * @flags: Link flags 710 * 711 * return -EINVAL or zero on success 712 */ 713 static int resizer_link_setup(struct media_entity *entity, 714 const struct media_pad *local, 715 const struct media_pad *remote, u32 flags) 716 { 717 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); 718 struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd); 719 struct iss_device *iss = to_iss_device(resizer); 720 unsigned int index = local->index; 721 722 /* FIXME: this is actually a hack! */ 723 if (is_media_entity_v4l2_subdev(remote->entity)) 724 index |= 2 << 16; 725 726 switch (index) { 727 case RESIZER_PAD_SINK | 2 << 16: 728 /* Read from IPIPE or IPIPEIF. */ 729 if (!(flags & MEDIA_LNK_FL_ENABLED)) { 730 resizer->input = RESIZER_INPUT_NONE; 731 break; 732 } 733 734 if (resizer->input != RESIZER_INPUT_NONE) 735 return -EBUSY; 736 737 if (remote->entity == &iss->ipipeif.subdev.entity) 738 resizer->input = RESIZER_INPUT_IPIPEIF; 739 else if (remote->entity == &iss->ipipe.subdev.entity) 740 resizer->input = RESIZER_INPUT_IPIPE; 741 742 break; 743 744 case RESIZER_PAD_SOURCE_MEM: 745 /* Write to memory */ 746 if (flags & MEDIA_LNK_FL_ENABLED) { 747 if (resizer->output & ~RESIZER_OUTPUT_MEMORY) 748 return -EBUSY; 749 resizer->output |= RESIZER_OUTPUT_MEMORY; 750 } else { 751 resizer->output &= ~RESIZER_OUTPUT_MEMORY; 752 } 753 break; 754 755 default: 756 return -EINVAL; 757 } 758 759 return 0; 760 } 761 762 /* media operations */ 763 static const struct media_entity_operations resizer_media_ops = { 764 .link_setup = resizer_link_setup, 765 .link_validate = v4l2_subdev_link_validate, 766 }; 767 768 /* 769 * resizer_init_entities - Initialize V4L2 subdev and media entity 770 * @resizer: ISS ISP RESIZER module 771 * 772 * Return 0 on success and a negative error code on failure. 773 */ 774 static int resizer_init_entities(struct iss_resizer_device *resizer) 775 { 776 struct v4l2_subdev *sd = &resizer->subdev; 777 struct media_pad *pads = resizer->pads; 778 struct media_entity *me = &sd->entity; 779 int ret; 780 781 resizer->input = RESIZER_INPUT_NONE; 782 783 v4l2_subdev_init(sd, &resizer_v4l2_ops); 784 sd->internal_ops = &resizer_v4l2_internal_ops; 785 strscpy(sd->name, "OMAP4 ISS ISP resizer", sizeof(sd->name)); 786 sd->grp_id = BIT(16); /* group ID for iss subdevs */ 787 v4l2_set_subdevdata(sd, resizer); 788 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 789 790 pads[RESIZER_PAD_SINK].flags = MEDIA_PAD_FL_SINK; 791 pads[RESIZER_PAD_SOURCE_MEM].flags = MEDIA_PAD_FL_SOURCE; 792 793 me->ops = &resizer_media_ops; 794 ret = media_entity_pads_init(me, RESIZER_PADS_NUM, pads); 795 if (ret < 0) 796 return ret; 797 798 resizer_init_formats(sd, NULL); 799 800 resizer->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 801 resizer->video_out.ops = &resizer_video_ops; 802 resizer->video_out.iss = to_iss_device(resizer); 803 resizer->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 3; 804 resizer->video_out.bpl_alignment = 32; 805 resizer->video_out.bpl_zero_padding = 1; 806 resizer->video_out.bpl_max = 0x1ffe0; 807 808 return omap4iss_video_init(&resizer->video_out, "ISP resizer a"); 809 } 810 811 void omap4iss_resizer_unregister_entities(struct iss_resizer_device *resizer) 812 { 813 v4l2_device_unregister_subdev(&resizer->subdev); 814 omap4iss_video_unregister(&resizer->video_out); 815 } 816 817 int omap4iss_resizer_register_entities(struct iss_resizer_device *resizer, 818 struct v4l2_device *vdev) 819 { 820 int ret; 821 822 /* Register the subdev and video node. */ 823 ret = v4l2_device_register_subdev(vdev, &resizer->subdev); 824 if (ret < 0) 825 goto error; 826 827 ret = omap4iss_video_register(&resizer->video_out, vdev); 828 if (ret < 0) 829 goto error; 830 831 return 0; 832 833 error: 834 omap4iss_resizer_unregister_entities(resizer); 835 return ret; 836 } 837 838 /* ----------------------------------------------------------------------------- 839 * ISP RESIZER initialisation and cleanup 840 */ 841 842 /* 843 * omap4iss_resizer_init - RESIZER module initialization. 844 * @iss: Device pointer specific to the OMAP4 ISS. 845 * 846 * TODO: Get the initialisation values from platform data. 847 * 848 * Return 0 on success or a negative error code otherwise. 849 */ 850 int omap4iss_resizer_init(struct iss_device *iss) 851 { 852 struct iss_resizer_device *resizer = &iss->resizer; 853 854 resizer->state = ISS_PIPELINE_STREAM_STOPPED; 855 init_waitqueue_head(&resizer->wait); 856 857 return resizer_init_entities(resizer); 858 } 859 860 /* 861 * omap4iss_resizer_create_links() - RESIZER pads links creation 862 * @iss: Pointer to ISS device 863 * 864 * return negative error code or zero on success 865 */ 866 int omap4iss_resizer_create_links(struct iss_device *iss) 867 { 868 struct iss_resizer_device *resizer = &iss->resizer; 869 870 /* Connect the RESIZER subdev to the video node. */ 871 return media_create_pad_link(&resizer->subdev.entity, 872 RESIZER_PAD_SOURCE_MEM, 873 &resizer->video_out.video.entity, 0, 0); 874 } 875 876 /* 877 * omap4iss_resizer_cleanup - RESIZER module cleanup. 878 * @iss: Device pointer specific to the OMAP4 ISS. 879 */ 880 void omap4iss_resizer_cleanup(struct iss_device *iss) 881 { 882 struct iss_resizer_device *resizer = &iss->resizer; 883 884 media_entity_cleanup(&resizer->subdev.entity); 885 } 886