1/* 2 * ispvideo.c 3 * 4 * TI OMAP3 ISP - Generic video node 5 * 6 * Copyright (C) 2009-2010 Nokia Corporation 7 * 8 * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com> 9 * Sakari Ailus <sakari.ailus@iki.fi> 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 */ 15 16#include <asm/cacheflush.h> 17#include <linux/clk.h> 18#include <linux/mm.h> 19#include <linux/module.h> 20#include <linux/pagemap.h> 21#include <linux/scatterlist.h> 22#include <linux/sched.h> 23#include <linux/slab.h> 24#include <linux/vmalloc.h> 25#include <media/v4l2-dev.h> 26#include <media/v4l2-ioctl.h> 27#include <media/videobuf2-dma-contig.h> 28 29#include "ispvideo.h" 30#include "isp.h" 31 32 33/* ----------------------------------------------------------------------------- 34 * Helper functions 35 */ 36 37/* 38 * NOTE: When adding new media bus codes, always remember to add 39 * corresponding in-memory formats to the table below!!! 40 */ 41static struct isp_format_info formats[] = { 42 { V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8, 43 V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8, 44 V4L2_PIX_FMT_GREY, 8, 1, }, 45 { V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y10_1X10, 46 V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y8_1X8, 47 V4L2_PIX_FMT_Y10, 10, 2, }, 48 { V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y10_1X10, 49 V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y8_1X8, 50 V4L2_PIX_FMT_Y12, 12, 2, }, 51 { V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8, 52 V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8, 53 V4L2_PIX_FMT_SBGGR8, 8, 1, }, 54 { V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8, 55 V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8, 56 V4L2_PIX_FMT_SGBRG8, 8, 1, }, 57 { V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8, 58 V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8, 59 V4L2_PIX_FMT_SGRBG8, 8, 1, }, 60 { V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8, 61 V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8, 62 V4L2_PIX_FMT_SRGGB8, 8, 1, }, 63 { V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8, V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8, 64 V4L2_MBUS_FMT_SBGGR10_1X10, 0, 65 V4L2_PIX_FMT_SBGGR10DPCM8, 8, 1, }, 66 { V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8, V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8, 67 V4L2_MBUS_FMT_SGBRG10_1X10, 0, 68 V4L2_PIX_FMT_SGBRG10DPCM8, 8, 1, }, 69 { V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, 70 V4L2_MBUS_FMT_SGRBG10_1X10, 0, 71 V4L2_PIX_FMT_SGRBG10DPCM8, 8, 1, }, 72 { V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8, V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8, 73 V4L2_MBUS_FMT_SRGGB10_1X10, 0, 74 V4L2_PIX_FMT_SRGGB10DPCM8, 8, 1, }, 75 { V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR10_1X10, 76 V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR8_1X8, 77 V4L2_PIX_FMT_SBGGR10, 10, 2, }, 78 { V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG10_1X10, 79 V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG8_1X8, 80 V4L2_PIX_FMT_SGBRG10, 10, 2, }, 81 { V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG10_1X10, 82 V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG8_1X8, 83 V4L2_PIX_FMT_SGRBG10, 10, 2, }, 84 { V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB10_1X10, 85 V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB8_1X8, 86 V4L2_PIX_FMT_SRGGB10, 10, 2, }, 87 { V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR10_1X10, 88 V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR8_1X8, 89 V4L2_PIX_FMT_SBGGR12, 12, 2, }, 90 { V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG10_1X10, 91 V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG8_1X8, 92 V4L2_PIX_FMT_SGBRG12, 12, 2, }, 93 { V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG10_1X10, 94 V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG8_1X8, 95 V4L2_PIX_FMT_SGRBG12, 12, 2, }, 96 { V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB10_1X10, 97 V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB8_1X8, 98 V4L2_PIX_FMT_SRGGB12, 12, 2, }, 99 { V4L2_MBUS_FMT_UYVY8_1X16, V4L2_MBUS_FMT_UYVY8_1X16, 100 V4L2_MBUS_FMT_UYVY8_1X16, 0, 101 V4L2_PIX_FMT_UYVY, 16, 2, }, 102 { V4L2_MBUS_FMT_YUYV8_1X16, V4L2_MBUS_FMT_YUYV8_1X16, 103 V4L2_MBUS_FMT_YUYV8_1X16, 0, 104 V4L2_PIX_FMT_YUYV, 16, 2, }, 105 { V4L2_MBUS_FMT_UYVY8_2X8, V4L2_MBUS_FMT_UYVY8_2X8, 106 V4L2_MBUS_FMT_UYVY8_2X8, 0, 107 V4L2_PIX_FMT_UYVY, 8, 2, }, 108 { V4L2_MBUS_FMT_YUYV8_2X8, V4L2_MBUS_FMT_YUYV8_2X8, 109 V4L2_MBUS_FMT_YUYV8_2X8, 0, 110 V4L2_PIX_FMT_YUYV, 8, 2, }, 111 /* Empty entry to catch the unsupported pixel code (0) used by the CCDC 112 * module and avoid NULL pointer dereferences. 113 */ 114 { 0, } 115}; 116 117const struct isp_format_info * 118omap3isp_video_format_info(enum v4l2_mbus_pixelcode code) 119{ 120 unsigned int i; 121 122 for (i = 0; i < ARRAY_SIZE(formats); ++i) { 123 if (formats[i].code == code) 124 return &formats[i]; 125 } 126 127 return NULL; 128} 129 130/* 131 * isp_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format 132 * @video: ISP video instance 133 * @mbus: v4l2_mbus_framefmt format (input) 134 * @pix: v4l2_pix_format format (output) 135 * 136 * Fill the output pix structure with information from the input mbus format. 137 * The bytesperline and sizeimage fields are computed from the requested bytes 138 * per line value in the pix format and information from the video instance. 139 * 140 * Return the number of padding bytes at end of line. 141 */ 142static unsigned int isp_video_mbus_to_pix(const struct isp_video *video, 143 const struct v4l2_mbus_framefmt *mbus, 144 struct v4l2_pix_format *pix) 145{ 146 unsigned int bpl = pix->bytesperline; 147 unsigned int min_bpl; 148 unsigned int i; 149 150 memset(pix, 0, sizeof(*pix)); 151 pix->width = mbus->width; 152 pix->height = mbus->height; 153 154 for (i = 0; i < ARRAY_SIZE(formats); ++i) { 155 if (formats[i].code == mbus->code) 156 break; 157 } 158 159 if (WARN_ON(i == ARRAY_SIZE(formats))) 160 return 0; 161 162 min_bpl = pix->width * formats[i].bpp; 163 164 /* Clamp the requested bytes per line value. If the maximum bytes per 165 * line value is zero, the module doesn't support user configurable line 166 * sizes. Override the requested value with the minimum in that case. 167 */ 168 if (video->bpl_max) 169 bpl = clamp(bpl, min_bpl, video->bpl_max); 170 else 171 bpl = min_bpl; 172 173 if (!video->bpl_zero_padding || bpl != min_bpl) 174 bpl = ALIGN(bpl, video->bpl_alignment); 175 176 pix->pixelformat = formats[i].pixelformat; 177 pix->bytesperline = bpl; 178 pix->sizeimage = pix->bytesperline * pix->height; 179 pix->colorspace = mbus->colorspace; 180 pix->field = mbus->field; 181 182 return bpl - min_bpl; 183} 184 185static void isp_video_pix_to_mbus(const struct v4l2_pix_format *pix, 186 struct v4l2_mbus_framefmt *mbus) 187{ 188 unsigned int i; 189 190 memset(mbus, 0, sizeof(*mbus)); 191 mbus->width = pix->width; 192 mbus->height = pix->height; 193 194 /* Skip the last format in the loop so that it will be selected if no 195 * match is found. 196 */ 197 for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) { 198 if (formats[i].pixelformat == pix->pixelformat) 199 break; 200 } 201 202 mbus->code = formats[i].code; 203 mbus->colorspace = pix->colorspace; 204 mbus->field = pix->field; 205} 206 207static struct v4l2_subdev * 208isp_video_remote_subdev(struct isp_video *video, u32 *pad) 209{ 210 struct media_pad *remote; 211 212 remote = media_entity_remote_pad(&video->pad); 213 214 if (remote == NULL || 215 media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV) 216 return NULL; 217 218 if (pad) 219 *pad = remote->index; 220 221 return media_entity_to_v4l2_subdev(remote->entity); 222} 223 224/* Return a pointer to the ISP video instance at the far end of the pipeline. */ 225static int isp_video_get_graph_data(struct isp_video *video, 226 struct isp_pipeline *pipe) 227{ 228 struct media_entity_graph graph; 229 struct media_entity *entity = &video->video.entity; 230 struct media_device *mdev = entity->parent; 231 struct isp_video *far_end = NULL; 232 233 mutex_lock(&mdev->graph_mutex); 234 media_entity_graph_walk_start(&graph, entity); 235 236 while ((entity = media_entity_graph_walk_next(&graph))) { 237 struct isp_video *__video; 238 239 pipe->entities |= 1 << entity->id; 240 241 if (far_end != NULL) 242 continue; 243 244 if (entity == &video->video.entity) 245 continue; 246 247 if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE) 248 continue; 249 250 __video = to_isp_video(media_entity_to_video_device(entity)); 251 if (__video->type != video->type) 252 far_end = __video; 253 } 254 255 mutex_unlock(&mdev->graph_mutex); 256 257 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { 258 pipe->input = far_end; 259 pipe->output = video; 260 } else { 261 if (far_end == NULL) 262 return -EPIPE; 263 264 pipe->input = video; 265 pipe->output = far_end; 266 } 267 268 return 0; 269} 270 271static int 272__isp_video_get_format(struct isp_video *video, struct v4l2_format *format) 273{ 274 struct v4l2_subdev_format fmt; 275 struct v4l2_subdev *subdev; 276 u32 pad; 277 int ret; 278 279 subdev = isp_video_remote_subdev(video, &pad); 280 if (subdev == NULL) 281 return -EINVAL; 282 283 fmt.pad = pad; 284 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; 285 286 mutex_lock(&video->mutex); 287 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); 288 mutex_unlock(&video->mutex); 289 290 if (ret) 291 return ret; 292 293 format->type = video->type; 294 return isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix); 295} 296 297static int 298isp_video_check_format(struct isp_video *video, struct isp_video_fh *vfh) 299{ 300 struct v4l2_format format; 301 int ret; 302 303 memcpy(&format, &vfh->format, sizeof(format)); 304 ret = __isp_video_get_format(video, &format); 305 if (ret < 0) 306 return ret; 307 308 if (vfh->format.fmt.pix.pixelformat != format.fmt.pix.pixelformat || 309 vfh->format.fmt.pix.height != format.fmt.pix.height || 310 vfh->format.fmt.pix.width != format.fmt.pix.width || 311 vfh->format.fmt.pix.bytesperline != format.fmt.pix.bytesperline || 312 vfh->format.fmt.pix.sizeimage != format.fmt.pix.sizeimage || 313 vfh->format.fmt.pix.field != format.fmt.pix.field) 314 return -EINVAL; 315 316 return 0; 317} 318 319/* ----------------------------------------------------------------------------- 320 * Video queue operations 321 */ 322 323static int isp_video_queue_setup(struct vb2_queue *queue, 324 const struct v4l2_format *fmt, 325 unsigned int *count, unsigned int *num_planes, 326 unsigned int sizes[], void *alloc_ctxs[]) 327{ 328 struct isp_video_fh *vfh = vb2_get_drv_priv(queue); 329 struct isp_video *video = vfh->video; 330 331 *num_planes = 1; 332 333 sizes[0] = vfh->format.fmt.pix.sizeimage; 334 if (sizes[0] == 0) 335 return -EINVAL; 336 337 alloc_ctxs[0] = video->alloc_ctx; 338 339 *count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0])); 340 341 return 0; 342} 343 344static int isp_video_buffer_prepare(struct vb2_buffer *buf) 345{ 346 struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue); 347 struct isp_buffer *buffer = to_isp_buffer(buf); 348 struct isp_video *video = vfh->video; 349 dma_addr_t addr; 350 351 /* Refuse to prepare the buffer is the video node has registered an 352 * error. We don't need to take any lock here as the operation is 353 * inherently racy. The authoritative check will be performed in the 354 * queue handler, which can't return an error, this check is just a best 355 * effort to notify userspace as early as possible. 356 */ 357 if (unlikely(video->error)) 358 return -EIO; 359 360 addr = vb2_dma_contig_plane_dma_addr(buf, 0); 361 if (!IS_ALIGNED(addr, 32)) { 362 dev_dbg(video->isp->dev, 363 "Buffer address must be aligned to 32 bytes boundary.\n"); 364 return -EINVAL; 365 } 366 367 vb2_set_plane_payload(&buffer->vb, 0, vfh->format.fmt.pix.sizeimage); 368 buffer->dma = addr; 369 370 return 0; 371} 372 373/* 374 * isp_video_buffer_queue - Add buffer to streaming queue 375 * @buf: Video buffer 376 * 377 * In memory-to-memory mode, start streaming on the pipeline if buffers are 378 * queued on both the input and the output, if the pipeline isn't already busy. 379 * If the pipeline is busy, it will be restarted in the output module interrupt 380 * handler. 381 */ 382static void isp_video_buffer_queue(struct vb2_buffer *buf) 383{ 384 struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue); 385 struct isp_buffer *buffer = to_isp_buffer(buf); 386 struct isp_video *video = vfh->video; 387 struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity); 388 enum isp_pipeline_state state; 389 unsigned long flags; 390 unsigned int empty; 391 unsigned int start; 392 393 spin_lock_irqsave(&video->irqlock, flags); 394 395 if (unlikely(video->error)) { 396 vb2_buffer_done(&buffer->vb, VB2_BUF_STATE_ERROR); 397 spin_unlock_irqrestore(&video->irqlock, flags); 398 return; 399 } 400 401 empty = list_empty(&video->dmaqueue); 402 list_add_tail(&buffer->irqlist, &video->dmaqueue); 403 404 spin_unlock_irqrestore(&video->irqlock, flags); 405 406 if (empty) { 407 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 408 state = ISP_PIPELINE_QUEUE_OUTPUT; 409 else 410 state = ISP_PIPELINE_QUEUE_INPUT; 411 412 spin_lock_irqsave(&pipe->lock, flags); 413 pipe->state |= state; 414 video->ops->queue(video, buffer); 415 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED; 416 417 start = isp_pipeline_ready(pipe); 418 if (start) 419 pipe->state |= ISP_PIPELINE_STREAM; 420 spin_unlock_irqrestore(&pipe->lock, flags); 421 422 if (start) 423 omap3isp_pipeline_set_stream(pipe, 424 ISP_PIPELINE_STREAM_SINGLESHOT); 425 } 426} 427 428static const struct vb2_ops isp_video_queue_ops = { 429 .queue_setup = isp_video_queue_setup, 430 .buf_prepare = isp_video_buffer_prepare, 431 .buf_queue = isp_video_buffer_queue, 432}; 433 434/* 435 * omap3isp_video_buffer_next - Complete the current buffer and return the next 436 * @video: ISP video object 437 * 438 * Remove the current video buffer from the DMA queue and fill its timestamp and 439 * field count before handing it back to videobuf2. 440 * 441 * For capture video nodes the buffer state is set to VB2_BUF_STATE_DONE if no 442 * error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise. 443 * For video output nodes the buffer state is always set to VB2_BUF_STATE_DONE. 444 * 445 * The DMA queue is expected to contain at least one buffer. 446 * 447 * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is 448 * empty. 449 */ 450struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video) 451{ 452 struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity); 453 enum isp_pipeline_state state; 454 struct isp_buffer *buf; 455 unsigned long flags; 456 struct timespec ts; 457 458 spin_lock_irqsave(&video->irqlock, flags); 459 if (WARN_ON(list_empty(&video->dmaqueue))) { 460 spin_unlock_irqrestore(&video->irqlock, flags); 461 return NULL; 462 } 463 464 buf = list_first_entry(&video->dmaqueue, struct isp_buffer, 465 irqlist); 466 list_del(&buf->irqlist); 467 spin_unlock_irqrestore(&video->irqlock, flags); 468 469 ktime_get_ts(&ts); 470 buf->vb.v4l2_buf.timestamp.tv_sec = ts.tv_sec; 471 buf->vb.v4l2_buf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC; 472 473 /* Do frame number propagation only if this is the output video node. 474 * Frame number either comes from the CSI receivers or it gets 475 * incremented here if H3A is not active. 476 * Note: There is no guarantee that the output buffer will finish 477 * first, so the input number might lag behind by 1 in some cases. 478 */ 479 if (video == pipe->output && !pipe->do_propagation) 480 buf->vb.v4l2_buf.sequence = 481 atomic_inc_return(&pipe->frame_number); 482 else 483 buf->vb.v4l2_buf.sequence = atomic_read(&pipe->frame_number); 484 485 if (pipe->field != V4L2_FIELD_NONE) 486 buf->vb.v4l2_buf.sequence /= 2; 487 488 buf->vb.v4l2_buf.field = pipe->field; 489 490 /* Report pipeline errors to userspace on the capture device side. */ 491 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) { 492 state = VB2_BUF_STATE_ERROR; 493 pipe->error = false; 494 } else { 495 state = VB2_BUF_STATE_DONE; 496 } 497 498 vb2_buffer_done(&buf->vb, state); 499 500 spin_lock_irqsave(&video->irqlock, flags); 501 502 if (list_empty(&video->dmaqueue)) { 503 spin_unlock_irqrestore(&video->irqlock, flags); 504 505 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 506 state = ISP_PIPELINE_QUEUE_OUTPUT 507 | ISP_PIPELINE_STREAM; 508 else 509 state = ISP_PIPELINE_QUEUE_INPUT 510 | ISP_PIPELINE_STREAM; 511 512 spin_lock_irqsave(&pipe->lock, flags); 513 pipe->state &= ~state; 514 if (video->pipe.stream_state == ISP_PIPELINE_STREAM_CONTINUOUS) 515 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN; 516 spin_unlock_irqrestore(&pipe->lock, flags); 517 return NULL; 518 } 519 520 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) { 521 spin_lock(&pipe->lock); 522 pipe->state &= ~ISP_PIPELINE_STREAM; 523 spin_unlock(&pipe->lock); 524 } 525 526 buf = list_first_entry(&video->dmaqueue, struct isp_buffer, 527 irqlist); 528 buf->vb.state = VB2_BUF_STATE_ACTIVE; 529 530 spin_unlock_irqrestore(&video->irqlock, flags); 531 532 return buf; 533} 534 535/* 536 * omap3isp_video_cancel_stream - Cancel stream on a video node 537 * @video: ISP video object 538 * 539 * Cancelling a stream mark all buffers on the video node as erroneous and makes 540 * sure no new buffer can be queued. 541 */ 542void omap3isp_video_cancel_stream(struct isp_video *video) 543{ 544 unsigned long flags; 545 546 spin_lock_irqsave(&video->irqlock, flags); 547 548 while (!list_empty(&video->dmaqueue)) { 549 struct isp_buffer *buf; 550 551 buf = list_first_entry(&video->dmaqueue, 552 struct isp_buffer, irqlist); 553 list_del(&buf->irqlist); 554 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR); 555 } 556 557 video->error = true; 558 559 spin_unlock_irqrestore(&video->irqlock, flags); 560} 561 562/* 563 * omap3isp_video_resume - Perform resume operation on the buffers 564 * @video: ISP video object 565 * @continuous: Pipeline is in single shot mode if 0 or continuous mode otherwise 566 * 567 * This function is intended to be used on suspend/resume scenario. It 568 * requests video queue layer to discard buffers marked as DONE if it's in 569 * continuous mode and requests ISP modules to queue again the ACTIVE buffer 570 * if there's any. 571 */ 572void omap3isp_video_resume(struct isp_video *video, int continuous) 573{ 574 struct isp_buffer *buf = NULL; 575 576 if (continuous && video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { 577 mutex_lock(&video->queue_lock); 578 vb2_discard_done(video->queue); 579 mutex_unlock(&video->queue_lock); 580 } 581 582 if (!list_empty(&video->dmaqueue)) { 583 buf = list_first_entry(&video->dmaqueue, 584 struct isp_buffer, irqlist); 585 video->ops->queue(video, buf); 586 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED; 587 } else { 588 if (continuous) 589 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN; 590 } 591} 592 593/* ----------------------------------------------------------------------------- 594 * V4L2 ioctls 595 */ 596 597static int 598isp_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap) 599{ 600 struct isp_video *video = video_drvdata(file); 601 602 strlcpy(cap->driver, ISP_VIDEO_DRIVER_NAME, sizeof(cap->driver)); 603 strlcpy(cap->card, video->video.name, sizeof(cap->card)); 604 strlcpy(cap->bus_info, "media", sizeof(cap->bus_info)); 605 606 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 607 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; 608 else 609 cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; 610 611 return 0; 612} 613 614static int 615isp_video_get_format(struct file *file, void *fh, struct v4l2_format *format) 616{ 617 struct isp_video_fh *vfh = to_isp_video_fh(fh); 618 struct isp_video *video = video_drvdata(file); 619 620 if (format->type != video->type) 621 return -EINVAL; 622 623 mutex_lock(&video->mutex); 624 *format = vfh->format; 625 mutex_unlock(&video->mutex); 626 627 return 0; 628} 629 630static int 631isp_video_set_format(struct file *file, void *fh, struct v4l2_format *format) 632{ 633 struct isp_video_fh *vfh = to_isp_video_fh(fh); 634 struct isp_video *video = video_drvdata(file); 635 struct v4l2_mbus_framefmt fmt; 636 637 if (format->type != video->type) 638 return -EINVAL; 639 640 /* Replace unsupported field orders with sane defaults. */ 641 switch (format->fmt.pix.field) { 642 case V4L2_FIELD_NONE: 643 /* Progressive is supported everywhere. */ 644 break; 645 case V4L2_FIELD_ALTERNATE: 646 /* ALTERNATE is not supported on output nodes. */ 647 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 648 format->fmt.pix.field = V4L2_FIELD_NONE; 649 break; 650 case V4L2_FIELD_INTERLACED: 651 /* The ISP has no concept of video standard, select the 652 * top-bottom order when the unqualified interlaced order is 653 * requested. 654 */ 655 format->fmt.pix.field = V4L2_FIELD_INTERLACED_TB; 656 /* Fall-through */ 657 case V4L2_FIELD_INTERLACED_TB: 658 case V4L2_FIELD_INTERLACED_BT: 659 /* Interlaced orders are only supported at the CCDC output. */ 660 if (video != &video->isp->isp_ccdc.video_out) 661 format->fmt.pix.field = V4L2_FIELD_NONE; 662 break; 663 case V4L2_FIELD_TOP: 664 case V4L2_FIELD_BOTTOM: 665 case V4L2_FIELD_SEQ_TB: 666 case V4L2_FIELD_SEQ_BT: 667 default: 668 /* All other field orders are currently unsupported, default to 669 * progressive. 670 */ 671 format->fmt.pix.field = V4L2_FIELD_NONE; 672 break; 673 } 674 675 /* Fill the bytesperline and sizeimage fields by converting to media bus 676 * format and back to pixel format. 677 */ 678 isp_video_pix_to_mbus(&format->fmt.pix, &fmt); 679 isp_video_mbus_to_pix(video, &fmt, &format->fmt.pix); 680 681 mutex_lock(&video->mutex); 682 vfh->format = *format; 683 mutex_unlock(&video->mutex); 684 685 return 0; 686} 687 688static int 689isp_video_try_format(struct file *file, void *fh, struct v4l2_format *format) 690{ 691 struct isp_video *video = video_drvdata(file); 692 struct v4l2_subdev_format fmt; 693 struct v4l2_subdev *subdev; 694 u32 pad; 695 int ret; 696 697 if (format->type != video->type) 698 return -EINVAL; 699 700 subdev = isp_video_remote_subdev(video, &pad); 701 if (subdev == NULL) 702 return -EINVAL; 703 704 isp_video_pix_to_mbus(&format->fmt.pix, &fmt.format); 705 706 fmt.pad = pad; 707 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; 708 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); 709 if (ret) 710 return ret == -ENOIOCTLCMD ? -ENOTTY : ret; 711 712 isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix); 713 return 0; 714} 715 716static int 717isp_video_cropcap(struct file *file, void *fh, struct v4l2_cropcap *cropcap) 718{ 719 struct isp_video *video = video_drvdata(file); 720 struct v4l2_subdev *subdev; 721 int ret; 722 723 subdev = isp_video_remote_subdev(video, NULL); 724 if (subdev == NULL) 725 return -EINVAL; 726 727 mutex_lock(&video->mutex); 728 ret = v4l2_subdev_call(subdev, video, cropcap, cropcap); 729 mutex_unlock(&video->mutex); 730 731 return ret == -ENOIOCTLCMD ? -ENOTTY : ret; 732} 733 734static int 735isp_video_get_crop(struct file *file, void *fh, struct v4l2_crop *crop) 736{ 737 struct isp_video *video = video_drvdata(file); 738 struct v4l2_subdev_format format; 739 struct v4l2_subdev *subdev; 740 u32 pad; 741 int ret; 742 743 subdev = isp_video_remote_subdev(video, &pad); 744 if (subdev == NULL) 745 return -EINVAL; 746 747 /* Try the get crop operation first and fallback to get format if not 748 * implemented. 749 */ 750 ret = v4l2_subdev_call(subdev, video, g_crop, crop); 751 if (ret != -ENOIOCTLCMD) 752 return ret; 753 754 format.pad = pad; 755 format.which = V4L2_SUBDEV_FORMAT_ACTIVE; 756 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format); 757 if (ret < 0) 758 return ret == -ENOIOCTLCMD ? -ENOTTY : ret; 759 760 crop->c.left = 0; 761 crop->c.top = 0; 762 crop->c.width = format.format.width; 763 crop->c.height = format.format.height; 764 765 return 0; 766} 767 768static int 769isp_video_set_crop(struct file *file, void *fh, const struct v4l2_crop *crop) 770{ 771 struct isp_video *video = video_drvdata(file); 772 struct v4l2_subdev *subdev; 773 int ret; 774 775 subdev = isp_video_remote_subdev(video, NULL); 776 if (subdev == NULL) 777 return -EINVAL; 778 779 mutex_lock(&video->mutex); 780 ret = v4l2_subdev_call(subdev, video, s_crop, crop); 781 mutex_unlock(&video->mutex); 782 783 return ret == -ENOIOCTLCMD ? -ENOTTY : ret; 784} 785 786static int 787isp_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a) 788{ 789 struct isp_video_fh *vfh = to_isp_video_fh(fh); 790 struct isp_video *video = video_drvdata(file); 791 792 if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || 793 video->type != a->type) 794 return -EINVAL; 795 796 memset(a, 0, sizeof(*a)); 797 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 798 a->parm.output.capability = V4L2_CAP_TIMEPERFRAME; 799 a->parm.output.timeperframe = vfh->timeperframe; 800 801 return 0; 802} 803 804static int 805isp_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a) 806{ 807 struct isp_video_fh *vfh = to_isp_video_fh(fh); 808 struct isp_video *video = video_drvdata(file); 809 810 if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || 811 video->type != a->type) 812 return -EINVAL; 813 814 if (a->parm.output.timeperframe.denominator == 0) 815 a->parm.output.timeperframe.denominator = 1; 816 817 vfh->timeperframe = a->parm.output.timeperframe; 818 819 return 0; 820} 821 822static int 823isp_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb) 824{ 825 struct isp_video_fh *vfh = to_isp_video_fh(fh); 826 struct isp_video *video = video_drvdata(file); 827 int ret; 828 829 mutex_lock(&video->queue_lock); 830 ret = vb2_reqbufs(&vfh->queue, rb); 831 mutex_unlock(&video->queue_lock); 832 833 return ret; 834} 835 836static int 837isp_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b) 838{ 839 struct isp_video_fh *vfh = to_isp_video_fh(fh); 840 struct isp_video *video = video_drvdata(file); 841 int ret; 842 843 mutex_lock(&video->queue_lock); 844 ret = vb2_querybuf(&vfh->queue, b); 845 mutex_unlock(&video->queue_lock); 846 847 return ret; 848} 849 850static int 851isp_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b) 852{ 853 struct isp_video_fh *vfh = to_isp_video_fh(fh); 854 struct isp_video *video = video_drvdata(file); 855 int ret; 856 857 mutex_lock(&video->queue_lock); 858 ret = vb2_qbuf(&vfh->queue, b); 859 mutex_unlock(&video->queue_lock); 860 861 return ret; 862} 863 864static int 865isp_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b) 866{ 867 struct isp_video_fh *vfh = to_isp_video_fh(fh); 868 struct isp_video *video = video_drvdata(file); 869 int ret; 870 871 mutex_lock(&video->queue_lock); 872 ret = vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK); 873 mutex_unlock(&video->queue_lock); 874 875 return ret; 876} 877 878static int isp_video_check_external_subdevs(struct isp_video *video, 879 struct isp_pipeline *pipe) 880{ 881 struct isp_device *isp = video->isp; 882 struct media_entity *ents[] = { 883 &isp->isp_csi2a.subdev.entity, 884 &isp->isp_csi2c.subdev.entity, 885 &isp->isp_ccp2.subdev.entity, 886 &isp->isp_ccdc.subdev.entity 887 }; 888 struct media_pad *source_pad; 889 struct media_entity *source = NULL; 890 struct media_entity *sink; 891 struct v4l2_subdev_format fmt; 892 struct v4l2_ext_controls ctrls; 893 struct v4l2_ext_control ctrl; 894 unsigned int i; 895 int ret; 896 897 /* Memory-to-memory pipelines have no external subdev. */ 898 if (pipe->input != NULL) 899 return 0; 900 901 for (i = 0; i < ARRAY_SIZE(ents); i++) { 902 /* Is the entity part of the pipeline? */ 903 if (!(pipe->entities & (1 << ents[i]->id))) 904 continue; 905 906 /* ISP entities have always sink pad == 0. Find source. */ 907 source_pad = media_entity_remote_pad(&ents[i]->pads[0]); 908 if (source_pad == NULL) 909 continue; 910 911 source = source_pad->entity; 912 sink = ents[i]; 913 break; 914 } 915 916 if (!source) { 917 dev_warn(isp->dev, "can't find source, failing now\n"); 918 return -EINVAL; 919 } 920 921 if (media_entity_type(source) != MEDIA_ENT_T_V4L2_SUBDEV) 922 return 0; 923 924 pipe->external = media_entity_to_v4l2_subdev(source); 925 926 fmt.pad = source_pad->index; 927 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; 928 ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(sink), 929 pad, get_fmt, NULL, &fmt); 930 if (unlikely(ret < 0)) { 931 dev_warn(isp->dev, "get_fmt returned null!\n"); 932 return ret; 933 } 934 935 pipe->external_width = 936 omap3isp_video_format_info(fmt.format.code)->width; 937 938 memset(&ctrls, 0, sizeof(ctrls)); 939 memset(&ctrl, 0, sizeof(ctrl)); 940 941 ctrl.id = V4L2_CID_PIXEL_RATE; 942 943 ctrls.count = 1; 944 ctrls.controls = &ctrl; 945 946 ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, &ctrls); 947 if (ret < 0) { 948 dev_warn(isp->dev, "no pixel rate control in subdev %s\n", 949 pipe->external->name); 950 return ret; 951 } 952 953 pipe->external_rate = ctrl.value64; 954 955 if (pipe->entities & (1 << isp->isp_ccdc.subdev.entity.id)) { 956 unsigned int rate = UINT_MAX; 957 /* 958 * Check that maximum allowed CCDC pixel rate isn't 959 * exceeded by the pixel rate. 960 */ 961 omap3isp_ccdc_max_rate(&isp->isp_ccdc, &rate); 962 if (pipe->external_rate > rate) 963 return -ENOSPC; 964 } 965 966 return 0; 967} 968 969/* 970 * Stream management 971 * 972 * Every ISP pipeline has a single input and a single output. The input can be 973 * either a sensor or a video node. The output is always a video node. 974 * 975 * As every pipeline has an output video node, the ISP video objects at the 976 * pipeline output stores the pipeline state. It tracks the streaming state of 977 * both the input and output, as well as the availability of buffers. 978 * 979 * In sensor-to-memory mode, frames are always available at the pipeline input. 980 * Starting the sensor usually requires I2C transfers and must be done in 981 * interruptible context. The pipeline is started and stopped synchronously 982 * to the stream on/off commands. All modules in the pipeline will get their 983 * subdev set stream handler called. The module at the end of the pipeline must 984 * delay starting the hardware until buffers are available at its output. 985 * 986 * In memory-to-memory mode, starting/stopping the stream requires 987 * synchronization between the input and output. ISP modules can't be stopped 988 * in the middle of a frame, and at least some of the modules seem to become 989 * busy as soon as they're started, even if they don't receive a frame start 990 * event. For that reason frames need to be processed in single-shot mode. The 991 * driver needs to wait until a frame is completely processed and written to 992 * memory before restarting the pipeline for the next frame. Pipelined 993 * processing might be possible but requires more testing. 994 * 995 * Stream start must be delayed until buffers are available at both the input 996 * and output. The pipeline must be started in the videobuf queue callback with 997 * the buffers queue spinlock held. The modules subdev set stream operation must 998 * not sleep. 999 */ 1000static int 1001isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type) 1002{ 1003 struct isp_video_fh *vfh = to_isp_video_fh(fh); 1004 struct isp_video *video = video_drvdata(file); 1005 enum isp_pipeline_state state; 1006 struct isp_pipeline *pipe; 1007 unsigned long flags; 1008 int ret; 1009 1010 if (type != video->type) 1011 return -EINVAL; 1012 1013 mutex_lock(&video->stream_lock); 1014 1015 /* Start streaming on the pipeline. No link touching an entity in the 1016 * pipeline can be activated or deactivated once streaming is started. 1017 */ 1018 pipe = video->video.entity.pipe 1019 ? to_isp_pipeline(&video->video.entity) : &video->pipe; 1020 1021 pipe->entities = 0; 1022 1023 if (video->isp->pdata->set_constraints) 1024 video->isp->pdata->set_constraints(video->isp, true); 1025 pipe->l3_ick = clk_get_rate(video->isp->clock[ISP_CLK_L3_ICK]); 1026 pipe->max_rate = pipe->l3_ick; 1027 1028 ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe); 1029 if (ret < 0) 1030 goto err_pipeline_start; 1031 1032 /* Verify that the currently configured format matches the output of 1033 * the connected subdev. 1034 */ 1035 ret = isp_video_check_format(video, vfh); 1036 if (ret < 0) 1037 goto err_check_format; 1038 1039 video->bpl_padding = ret; 1040 video->bpl_value = vfh->format.fmt.pix.bytesperline; 1041 1042 ret = isp_video_get_graph_data(video, pipe); 1043 if (ret < 0) 1044 goto err_check_format; 1045 1046 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 1047 state = ISP_PIPELINE_STREAM_OUTPUT | ISP_PIPELINE_IDLE_OUTPUT; 1048 else 1049 state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT; 1050 1051 ret = isp_video_check_external_subdevs(video, pipe); 1052 if (ret < 0) 1053 goto err_check_format; 1054 1055 pipe->error = false; 1056 1057 spin_lock_irqsave(&pipe->lock, flags); 1058 pipe->state &= ~ISP_PIPELINE_STREAM; 1059 pipe->state |= state; 1060 spin_unlock_irqrestore(&pipe->lock, flags); 1061 1062 /* Set the maximum time per frame as the value requested by userspace. 1063 * This is a soft limit that can be overridden if the hardware doesn't 1064 * support the request limit. 1065 */ 1066 if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1067 pipe->max_timeperframe = vfh->timeperframe; 1068 1069 video->queue = &vfh->queue; 1070 INIT_LIST_HEAD(&video->dmaqueue); 1071 atomic_set(&pipe->frame_number, -1); 1072 pipe->field = vfh->format.fmt.pix.field; 1073 1074 mutex_lock(&video->queue_lock); 1075 ret = vb2_streamon(&vfh->queue, type); 1076 mutex_unlock(&video->queue_lock); 1077 if (ret < 0) 1078 goto err_check_format; 1079 1080 /* In sensor-to-memory mode, the stream can be started synchronously 1081 * to the stream on command. In memory-to-memory mode, it will be 1082 * started when buffers are queued on both the input and output. 1083 */ 1084 if (pipe->input == NULL) { 1085 ret = omap3isp_pipeline_set_stream(pipe, 1086 ISP_PIPELINE_STREAM_CONTINUOUS); 1087 if (ret < 0) 1088 goto err_set_stream; 1089 spin_lock_irqsave(&video->irqlock, flags); 1090 if (list_empty(&video->dmaqueue)) 1091 video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN; 1092 spin_unlock_irqrestore(&video->irqlock, flags); 1093 } 1094 1095 mutex_unlock(&video->stream_lock); 1096 return 0; 1097 1098err_set_stream: 1099 mutex_lock(&video->queue_lock); 1100 vb2_streamoff(&vfh->queue, type); 1101 mutex_unlock(&video->queue_lock); 1102err_check_format: 1103 media_entity_pipeline_stop(&video->video.entity); 1104err_pipeline_start: 1105 if (video->isp->pdata->set_constraints) 1106 video->isp->pdata->set_constraints(video->isp, false); 1107 /* The DMA queue must be emptied here, otherwise CCDC interrupts that 1108 * will get triggered the next time the CCDC is powered up will try to 1109 * access buffers that might have been freed but still present in the 1110 * DMA queue. This can easily get triggered if the above 1111 * omap3isp_pipeline_set_stream() call fails on a system with a 1112 * free-running sensor. 1113 */ 1114 INIT_LIST_HEAD(&video->dmaqueue); 1115 video->queue = NULL; 1116 1117 mutex_unlock(&video->stream_lock); 1118 return ret; 1119} 1120 1121static int 1122isp_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type) 1123{ 1124 struct isp_video_fh *vfh = to_isp_video_fh(fh); 1125 struct isp_video *video = video_drvdata(file); 1126 struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity); 1127 enum isp_pipeline_state state; 1128 unsigned int streaming; 1129 unsigned long flags; 1130 1131 if (type != video->type) 1132 return -EINVAL; 1133 1134 mutex_lock(&video->stream_lock); 1135 1136 /* Make sure we're not streaming yet. */ 1137 mutex_lock(&video->queue_lock); 1138 streaming = vb2_is_streaming(&vfh->queue); 1139 mutex_unlock(&video->queue_lock); 1140 1141 if (!streaming) 1142 goto done; 1143 1144 /* Update the pipeline state. */ 1145 if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 1146 state = ISP_PIPELINE_STREAM_OUTPUT 1147 | ISP_PIPELINE_QUEUE_OUTPUT; 1148 else 1149 state = ISP_PIPELINE_STREAM_INPUT 1150 | ISP_PIPELINE_QUEUE_INPUT; 1151 1152 spin_lock_irqsave(&pipe->lock, flags); 1153 pipe->state &= ~state; 1154 spin_unlock_irqrestore(&pipe->lock, flags); 1155 1156 /* Stop the stream. */ 1157 omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_STOPPED); 1158 omap3isp_video_cancel_stream(video); 1159 1160 mutex_lock(&video->queue_lock); 1161 vb2_streamoff(&vfh->queue, type); 1162 mutex_unlock(&video->queue_lock); 1163 video->queue = NULL; 1164 video->error = false; 1165 1166 if (video->isp->pdata->set_constraints) 1167 video->isp->pdata->set_constraints(video->isp, false); 1168 media_entity_pipeline_stop(&video->video.entity); 1169 1170done: 1171 mutex_unlock(&video->stream_lock); 1172 return 0; 1173} 1174 1175static int 1176isp_video_enum_input(struct file *file, void *fh, struct v4l2_input *input) 1177{ 1178 if (input->index > 0) 1179 return -EINVAL; 1180 1181 strlcpy(input->name, "camera", sizeof(input->name)); 1182 input->type = V4L2_INPUT_TYPE_CAMERA; 1183 1184 return 0; 1185} 1186 1187static int 1188isp_video_g_input(struct file *file, void *fh, unsigned int *input) 1189{ 1190 *input = 0; 1191 1192 return 0; 1193} 1194 1195static int 1196isp_video_s_input(struct file *file, void *fh, unsigned int input) 1197{ 1198 return input == 0 ? 0 : -EINVAL; 1199} 1200 1201static const struct v4l2_ioctl_ops isp_video_ioctl_ops = { 1202 .vidioc_querycap = isp_video_querycap, 1203 .vidioc_g_fmt_vid_cap = isp_video_get_format, 1204 .vidioc_s_fmt_vid_cap = isp_video_set_format, 1205 .vidioc_try_fmt_vid_cap = isp_video_try_format, 1206 .vidioc_g_fmt_vid_out = isp_video_get_format, 1207 .vidioc_s_fmt_vid_out = isp_video_set_format, 1208 .vidioc_try_fmt_vid_out = isp_video_try_format, 1209 .vidioc_cropcap = isp_video_cropcap, 1210 .vidioc_g_crop = isp_video_get_crop, 1211 .vidioc_s_crop = isp_video_set_crop, 1212 .vidioc_g_parm = isp_video_get_param, 1213 .vidioc_s_parm = isp_video_set_param, 1214 .vidioc_reqbufs = isp_video_reqbufs, 1215 .vidioc_querybuf = isp_video_querybuf, 1216 .vidioc_qbuf = isp_video_qbuf, 1217 .vidioc_dqbuf = isp_video_dqbuf, 1218 .vidioc_streamon = isp_video_streamon, 1219 .vidioc_streamoff = isp_video_streamoff, 1220 .vidioc_enum_input = isp_video_enum_input, 1221 .vidioc_g_input = isp_video_g_input, 1222 .vidioc_s_input = isp_video_s_input, 1223}; 1224 1225/* ----------------------------------------------------------------------------- 1226 * V4L2 file operations 1227 */ 1228 1229static int isp_video_open(struct file *file) 1230{ 1231 struct isp_video *video = video_drvdata(file); 1232 struct isp_video_fh *handle; 1233 struct vb2_queue *queue; 1234 int ret = 0; 1235 1236 handle = kzalloc(sizeof(*handle), GFP_KERNEL); 1237 if (handle == NULL) 1238 return -ENOMEM; 1239 1240 v4l2_fh_init(&handle->vfh, &video->video); 1241 v4l2_fh_add(&handle->vfh); 1242 1243 /* If this is the first user, initialise the pipeline. */ 1244 if (omap3isp_get(video->isp) == NULL) { 1245 ret = -EBUSY; 1246 goto done; 1247 } 1248 1249 ret = omap3isp_pipeline_pm_use(&video->video.entity, 1); 1250 if (ret < 0) { 1251 omap3isp_put(video->isp); 1252 goto done; 1253 } 1254 1255 queue = &handle->queue; 1256 queue->type = video->type; 1257 queue->io_modes = VB2_MMAP | VB2_USERPTR; 1258 queue->drv_priv = handle; 1259 queue->ops = &isp_video_queue_ops; 1260 queue->mem_ops = &vb2_dma_contig_memops; 1261 queue->buf_struct_size = sizeof(struct isp_buffer); 1262 queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1263 1264 ret = vb2_queue_init(&handle->queue); 1265 if (ret < 0) { 1266 omap3isp_put(video->isp); 1267 goto done; 1268 } 1269 1270 memset(&handle->format, 0, sizeof(handle->format)); 1271 handle->format.type = video->type; 1272 handle->timeperframe.denominator = 1; 1273 1274 handle->video = video; 1275 file->private_data = &handle->vfh; 1276 1277done: 1278 if (ret < 0) { 1279 v4l2_fh_del(&handle->vfh); 1280 kfree(handle); 1281 } 1282 1283 return ret; 1284} 1285 1286static int isp_video_release(struct file *file) 1287{ 1288 struct isp_video *video = video_drvdata(file); 1289 struct v4l2_fh *vfh = file->private_data; 1290 struct isp_video_fh *handle = to_isp_video_fh(vfh); 1291 1292 /* Disable streaming and free the buffers queue resources. */ 1293 isp_video_streamoff(file, vfh, video->type); 1294 1295 mutex_lock(&video->queue_lock); 1296 vb2_queue_release(&handle->queue); 1297 mutex_unlock(&video->queue_lock); 1298 1299 omap3isp_pipeline_pm_use(&video->video.entity, 0); 1300 1301 /* Release the file handle. */ 1302 v4l2_fh_del(vfh); 1303 kfree(handle); 1304 file->private_data = NULL; 1305 1306 omap3isp_put(video->isp); 1307 1308 return 0; 1309} 1310 1311static unsigned int isp_video_poll(struct file *file, poll_table *wait) 1312{ 1313 struct isp_video_fh *vfh = to_isp_video_fh(file->private_data); 1314 struct isp_video *video = video_drvdata(file); 1315 int ret; 1316 1317 mutex_lock(&video->queue_lock); 1318 ret = vb2_poll(&vfh->queue, file, wait); 1319 mutex_unlock(&video->queue_lock); 1320 1321 return ret; 1322} 1323 1324static int isp_video_mmap(struct file *file, struct vm_area_struct *vma) 1325{ 1326 struct isp_video_fh *vfh = to_isp_video_fh(file->private_data); 1327 struct isp_video *video = video_drvdata(file); 1328 int ret; 1329 1330 mutex_lock(&video->queue_lock); 1331 ret = vb2_mmap(&vfh->queue, vma); 1332 mutex_unlock(&video->queue_lock); 1333 1334 return ret; 1335} 1336 1337static struct v4l2_file_operations isp_video_fops = { 1338 .owner = THIS_MODULE, 1339 .unlocked_ioctl = video_ioctl2, 1340 .open = isp_video_open, 1341 .release = isp_video_release, 1342 .poll = isp_video_poll, 1343 .mmap = isp_video_mmap, 1344}; 1345 1346/* ----------------------------------------------------------------------------- 1347 * ISP video core 1348 */ 1349 1350static const struct isp_video_operations isp_video_dummy_ops = { 1351}; 1352 1353int omap3isp_video_init(struct isp_video *video, const char *name) 1354{ 1355 const char *direction; 1356 int ret; 1357 1358 switch (video->type) { 1359 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1360 direction = "output"; 1361 video->pad.flags = MEDIA_PAD_FL_SINK 1362 | MEDIA_PAD_FL_MUST_CONNECT; 1363 break; 1364 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1365 direction = "input"; 1366 video->pad.flags = MEDIA_PAD_FL_SOURCE 1367 | MEDIA_PAD_FL_MUST_CONNECT; 1368 video->video.vfl_dir = VFL_DIR_TX; 1369 break; 1370 1371 default: 1372 return -EINVAL; 1373 } 1374 1375 video->alloc_ctx = vb2_dma_contig_init_ctx(video->isp->dev); 1376 if (IS_ERR(video->alloc_ctx)) 1377 return PTR_ERR(video->alloc_ctx); 1378 1379 ret = media_entity_init(&video->video.entity, 1, &video->pad, 0); 1380 if (ret < 0) { 1381 vb2_dma_contig_cleanup_ctx(video->alloc_ctx); 1382 return ret; 1383 } 1384 1385 mutex_init(&video->mutex); 1386 atomic_set(&video->active, 0); 1387 1388 spin_lock_init(&video->pipe.lock); 1389 mutex_init(&video->stream_lock); 1390 mutex_init(&video->queue_lock); 1391 spin_lock_init(&video->irqlock); 1392 1393 /* Initialize the video device. */ 1394 if (video->ops == NULL) 1395 video->ops = &isp_video_dummy_ops; 1396 1397 video->video.fops = &isp_video_fops; 1398 snprintf(video->video.name, sizeof(video->video.name), 1399 "OMAP3 ISP %s %s", name, direction); 1400 video->video.vfl_type = VFL_TYPE_GRABBER; 1401 video->video.release = video_device_release_empty; 1402 video->video.ioctl_ops = &isp_video_ioctl_ops; 1403 video->pipe.stream_state = ISP_PIPELINE_STREAM_STOPPED; 1404 1405 video_set_drvdata(&video->video, video); 1406 1407 return 0; 1408} 1409 1410void omap3isp_video_cleanup(struct isp_video *video) 1411{ 1412 vb2_dma_contig_cleanup_ctx(video->alloc_ctx); 1413 media_entity_cleanup(&video->video.entity); 1414 mutex_destroy(&video->queue_lock); 1415 mutex_destroy(&video->stream_lock); 1416 mutex_destroy(&video->mutex); 1417} 1418 1419int omap3isp_video_register(struct isp_video *video, struct v4l2_device *vdev) 1420{ 1421 int ret; 1422 1423 video->video.v4l2_dev = vdev; 1424 1425 ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1); 1426 if (ret < 0) 1427 dev_err(video->isp->dev, 1428 "%s: could not register video device (%d)\n", 1429 __func__, ret); 1430 1431 return ret; 1432} 1433 1434void omap3isp_video_unregister(struct isp_video *video) 1435{ 1436 if (video_is_registered(&video->video)) 1437 video_unregister_device(&video->video); 1438} 1439