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1// SPDX-License-Identifier: GPL-2.0+2/*3 * vsp1_histo.c -- R-Car VSP1 Histogram API4 *5 * Copyright (C) 2016 Renesas Electronics Corporation6 * Copyright (C) 2016 Laurent Pinchart7 *8 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)9 */10 11#include <linux/device.h>12#include <linux/gfp.h>13 14#include <media/v4l2-ioctl.h>15#include <media/v4l2-subdev.h>16#include <media/videobuf2-vmalloc.h>17 18#include "vsp1.h"19#include "vsp1_histo.h"20#include "vsp1_pipe.h"21 22#define HISTO_MIN_SIZE 4U23#define HISTO_MAX_SIZE 8192U24 25/* -----------------------------------------------------------------------------26 * Buffer Operations27 */28 29static inline struct vsp1_histogram_buffer *30to_vsp1_histogram_buffer(struct vb2_v4l2_buffer *vbuf)31{32 return container_of(vbuf, struct vsp1_histogram_buffer, buf);33}34 35struct vsp1_histogram_buffer *36vsp1_histogram_buffer_get(struct vsp1_histogram *histo)37{38 struct vsp1_histogram_buffer *buf = NULL;39 40 spin_lock(&histo->irqlock);41 42 if (list_empty(&histo->irqqueue))43 goto done;44 45 buf = list_first_entry(&histo->irqqueue, struct vsp1_histogram_buffer,46 queue);47 list_del(&buf->queue);48 histo->readout = true;49 50done:51 spin_unlock(&histo->irqlock);52 return buf;53}54 55void vsp1_histogram_buffer_complete(struct vsp1_histogram *histo,56 struct vsp1_histogram_buffer *buf,57 size_t size)58{59 struct vsp1_pipeline *pipe = histo->entity.pipe;60 61 /*62 * The pipeline pointer is guaranteed to be valid as this function is63 * called from the frame completion interrupt handler, which can only64 * occur when video streaming is active.65 */66 buf->buf.sequence = pipe->sequence;67 buf->buf.vb2_buf.timestamp = ktime_get_ns();68 vb2_set_plane_payload(&buf->buf.vb2_buf, 0, size);69 vb2_buffer_done(&buf->buf.vb2_buf, VB2_BUF_STATE_DONE);70 71 spin_lock(&histo->irqlock);72 histo->readout = false;73 wake_up(&histo->wait_queue);74 spin_unlock(&histo->irqlock);75}76 77/* -----------------------------------------------------------------------------78 * videobuf2 Queue Operations79 */80 81static int histo_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,82 unsigned int *nplanes, unsigned int sizes[],83 struct device *alloc_devs[])84{85 struct vsp1_histogram *histo = vb2_get_drv_priv(vq);86 87 if (*nplanes) {88 if (*nplanes != 1)89 return -EINVAL;90 91 if (sizes[0] < histo->data_size)92 return -EINVAL;93 94 return 0;95 }96 97 *nplanes = 1;98 sizes[0] = histo->data_size;99 100 return 0;101}102 103static int histo_buffer_prepare(struct vb2_buffer *vb)104{105 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);106 struct vsp1_histogram *histo = vb2_get_drv_priv(vb->vb2_queue);107 struct vsp1_histogram_buffer *buf = to_vsp1_histogram_buffer(vbuf);108 109 if (vb->num_planes != 1)110 return -EINVAL;111 112 if (vb2_plane_size(vb, 0) < histo->data_size)113 return -EINVAL;114 115 buf->addr = vb2_plane_vaddr(vb, 0);116 117 return 0;118}119 120static void histo_buffer_queue(struct vb2_buffer *vb)121{122 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);123 struct vsp1_histogram *histo = vb2_get_drv_priv(vb->vb2_queue);124 struct vsp1_histogram_buffer *buf = to_vsp1_histogram_buffer(vbuf);125 126 spin_lock_irq(&histo->irqlock);127 list_add_tail(&buf->queue, &histo->irqqueue);128 spin_unlock_irq(&histo->irqlock);129}130 131static int histo_start_streaming(struct vb2_queue *vq, unsigned int count)132{133 return 0;134}135 136static void histo_stop_streaming(struct vb2_queue *vq)137{138 struct vsp1_histogram *histo = vb2_get_drv_priv(vq);139 struct vsp1_histogram_buffer *buffer;140 141 spin_lock_irq(&histo->irqlock);142 143 /* Remove all buffers from the IRQ queue. */144 list_for_each_entry(buffer, &histo->irqqueue, queue)145 vb2_buffer_done(&buffer->buf.vb2_buf, VB2_BUF_STATE_ERROR);146 INIT_LIST_HEAD(&histo->irqqueue);147 148 /* Wait for the buffer being read out (if any) to complete. */149 wait_event_lock_irq(histo->wait_queue, !histo->readout, histo->irqlock);150 151 spin_unlock_irq(&histo->irqlock);152}153 154static const struct vb2_ops histo_video_queue_qops = {155 .queue_setup = histo_queue_setup,156 .buf_prepare = histo_buffer_prepare,157 .buf_queue = histo_buffer_queue,158 .wait_prepare = vb2_ops_wait_prepare,159 .wait_finish = vb2_ops_wait_finish,160 .start_streaming = histo_start_streaming,161 .stop_streaming = histo_stop_streaming,162};163 164/* -----------------------------------------------------------------------------165 * V4L2 Subdevice Operations166 */167 168static int histo_enum_mbus_code(struct v4l2_subdev *subdev,169 struct v4l2_subdev_state *sd_state,170 struct v4l2_subdev_mbus_code_enum *code)171{172 struct vsp1_histogram *histo = subdev_to_histo(subdev);173 174 if (code->pad == HISTO_PAD_SOURCE) {175 code->code = MEDIA_BUS_FMT_FIXED;176 return 0;177 }178 179 return vsp1_subdev_enum_mbus_code(subdev, sd_state, code,180 histo->formats,181 histo->num_formats);182}183 184static int histo_enum_frame_size(struct v4l2_subdev *subdev,185 struct v4l2_subdev_state *sd_state,186 struct v4l2_subdev_frame_size_enum *fse)187{188 if (fse->pad != HISTO_PAD_SINK)189 return -EINVAL;190 191 return vsp1_subdev_enum_frame_size(subdev, sd_state, fse,192 HISTO_MIN_SIZE,193 HISTO_MIN_SIZE, HISTO_MAX_SIZE,194 HISTO_MAX_SIZE);195}196 197static int histo_get_selection(struct v4l2_subdev *subdev,198 struct v4l2_subdev_state *sd_state,199 struct v4l2_subdev_selection *sel)200{201 struct vsp1_histogram *histo = subdev_to_histo(subdev);202 struct v4l2_subdev_state *state;203 struct v4l2_mbus_framefmt *format;204 struct v4l2_rect *crop;205 int ret = 0;206 207 if (sel->pad != HISTO_PAD_SINK)208 return -EINVAL;209 210 mutex_lock(&histo->entity.lock);211 212 state = vsp1_entity_get_state(&histo->entity, sd_state, sel->which);213 if (!state) {214 ret = -EINVAL;215 goto done;216 }217 218 switch (sel->target) {219 case V4L2_SEL_TGT_COMPOSE_BOUNDS:220 case V4L2_SEL_TGT_COMPOSE_DEFAULT:221 crop = v4l2_subdev_state_get_crop(state, HISTO_PAD_SINK);222 sel->r.left = 0;223 sel->r.top = 0;224 sel->r.width = crop->width;225 sel->r.height = crop->height;226 break;227 228 case V4L2_SEL_TGT_CROP_BOUNDS:229 case V4L2_SEL_TGT_CROP_DEFAULT:230 format = v4l2_subdev_state_get_format(state, HISTO_PAD_SINK);231 sel->r.left = 0;232 sel->r.top = 0;233 sel->r.width = format->width;234 sel->r.height = format->height;235 break;236 237 case V4L2_SEL_TGT_COMPOSE:238 sel->r = *v4l2_subdev_state_get_compose(state, sel->pad);239 break;240 241 case V4L2_SEL_TGT_CROP:242 sel->r = *v4l2_subdev_state_get_crop(state, sel->pad);243 break;244 245 default:246 ret = -EINVAL;247 break;248 }249 250done:251 mutex_unlock(&histo->entity.lock);252 return ret;253}254 255static int histo_set_crop(struct v4l2_subdev *subdev,256 struct v4l2_subdev_state *sd_state,257 struct v4l2_subdev_selection *sel)258{259 struct v4l2_mbus_framefmt *format;260 261 /* The crop rectangle must be inside the input frame. */262 format = v4l2_subdev_state_get_format(sd_state, HISTO_PAD_SINK);263 sel->r.left = clamp_t(unsigned int, sel->r.left, 0, format->width - 1);264 sel->r.top = clamp_t(unsigned int, sel->r.top, 0, format->height - 1);265 sel->r.width = clamp_t(unsigned int, sel->r.width, HISTO_MIN_SIZE,266 format->width - sel->r.left);267 sel->r.height = clamp_t(unsigned int, sel->r.height, HISTO_MIN_SIZE,268 format->height - sel->r.top);269 270 /* Set the crop rectangle and reset the compose rectangle. */271 *v4l2_subdev_state_get_crop(sd_state, sel->pad) = sel->r;272 *v4l2_subdev_state_get_compose(sd_state, sel->pad) = sel->r;273 274 return 0;275}276 277static int histo_set_compose(struct v4l2_subdev *subdev,278 struct v4l2_subdev_state *sd_state,279 struct v4l2_subdev_selection *sel)280{281 struct v4l2_rect *compose;282 struct v4l2_rect *crop;283 unsigned int ratio;284 285 /*286 * The compose rectangle is used to configure downscaling, the top left287 * corner is fixed to (0,0) and the size to 1/2 or 1/4 of the crop288 * rectangle.289 */290 sel->r.left = 0;291 sel->r.top = 0;292 293 crop = v4l2_subdev_state_get_crop(sd_state, sel->pad);294 295 /*296 * Clamp the width and height to acceptable values first and then297 * compute the closest rounded dividing ratio.298 *299 * Ratio Rounded ratio300 * --------------------------301 * [1.0 1.5[ 1302 * [1.5 3.0[ 2303 * [3.0 4.0] 4304 *305 * The rounded ratio can be computed using306 *307 * 1 << (ceil(ratio * 2) / 3)308 */309 sel->r.width = clamp(sel->r.width, crop->width / 4, crop->width);310 ratio = 1 << (crop->width * 2 / sel->r.width / 3);311 sel->r.width = crop->width / ratio;312 313 314 sel->r.height = clamp(sel->r.height, crop->height / 4, crop->height);315 ratio = 1 << (crop->height * 2 / sel->r.height / 3);316 sel->r.height = crop->height / ratio;317 318 compose = v4l2_subdev_state_get_compose(sd_state, sel->pad);319 *compose = sel->r;320 321 return 0;322}323 324static int histo_set_selection(struct v4l2_subdev *subdev,325 struct v4l2_subdev_state *sd_state,326 struct v4l2_subdev_selection *sel)327{328 struct vsp1_histogram *histo = subdev_to_histo(subdev);329 struct v4l2_subdev_state *state;330 int ret;331 332 if (sel->pad != HISTO_PAD_SINK)333 return -EINVAL;334 335 mutex_lock(&histo->entity.lock);336 337 state = vsp1_entity_get_state(&histo->entity, sd_state, sel->which);338 if (!state) {339 ret = -EINVAL;340 goto done;341 }342 343 if (sel->target == V4L2_SEL_TGT_CROP)344 ret = histo_set_crop(subdev, state, sel);345 else if (sel->target == V4L2_SEL_TGT_COMPOSE)346 ret = histo_set_compose(subdev, state, sel);347 else348 ret = -EINVAL;349 350done:351 mutex_unlock(&histo->entity.lock);352 return ret;353}354 355static int histo_set_format(struct v4l2_subdev *subdev,356 struct v4l2_subdev_state *sd_state,357 struct v4l2_subdev_format *fmt)358{359 struct vsp1_histogram *histo = subdev_to_histo(subdev);360 361 if (fmt->pad == HISTO_PAD_SOURCE) {362 fmt->format.code = MEDIA_BUS_FMT_FIXED;363 fmt->format.width = 0;364 fmt->format.height = 0;365 fmt->format.field = V4L2_FIELD_NONE;366 fmt->format.colorspace = V4L2_COLORSPACE_RAW;367 368 return 0;369 }370 371 return vsp1_subdev_set_pad_format(subdev, sd_state, fmt,372 histo->formats, histo->num_formats,373 HISTO_MIN_SIZE, HISTO_MIN_SIZE,374 HISTO_MAX_SIZE, HISTO_MAX_SIZE);375}376 377static const struct v4l2_subdev_pad_ops histo_pad_ops = {378 .enum_mbus_code = histo_enum_mbus_code,379 .enum_frame_size = histo_enum_frame_size,380 .get_fmt = vsp1_subdev_get_pad_format,381 .set_fmt = histo_set_format,382 .get_selection = histo_get_selection,383 .set_selection = histo_set_selection,384};385 386static const struct v4l2_subdev_ops histo_ops = {387 .pad = &histo_pad_ops,388};389 390/* -----------------------------------------------------------------------------391 * V4L2 ioctls392 */393 394static int histo_v4l2_querycap(struct file *file, void *fh,395 struct v4l2_capability *cap)396{397 struct v4l2_fh *vfh = file->private_data;398 struct vsp1_histogram *histo = vdev_to_histo(vfh->vdev);399 400 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING401 | V4L2_CAP_VIDEO_CAPTURE_MPLANE402 | V4L2_CAP_VIDEO_OUTPUT_MPLANE403 | V4L2_CAP_META_CAPTURE;404 405 strscpy(cap->driver, "vsp1", sizeof(cap->driver));406 strscpy(cap->card, histo->video.name, sizeof(cap->card));407 408 return 0;409}410 411static int histo_v4l2_enum_format(struct file *file, void *fh,412 struct v4l2_fmtdesc *f)413{414 struct v4l2_fh *vfh = file->private_data;415 struct vsp1_histogram *histo = vdev_to_histo(vfh->vdev);416 417 if (f->index > 0 || f->type != histo->queue.type)418 return -EINVAL;419 420 f->pixelformat = histo->meta_format;421 422 return 0;423}424 425static int histo_v4l2_get_format(struct file *file, void *fh,426 struct v4l2_format *format)427{428 struct v4l2_fh *vfh = file->private_data;429 struct vsp1_histogram *histo = vdev_to_histo(vfh->vdev);430 struct v4l2_meta_format *meta = &format->fmt.meta;431 432 if (format->type != histo->queue.type)433 return -EINVAL;434 435 memset(meta, 0, sizeof(*meta));436 437 meta->dataformat = histo->meta_format;438 meta->buffersize = histo->data_size;439 440 return 0;441}442 443static const struct v4l2_ioctl_ops histo_v4l2_ioctl_ops = {444 .vidioc_querycap = histo_v4l2_querycap,445 .vidioc_enum_fmt_meta_cap = histo_v4l2_enum_format,446 .vidioc_g_fmt_meta_cap = histo_v4l2_get_format,447 .vidioc_s_fmt_meta_cap = histo_v4l2_get_format,448 .vidioc_try_fmt_meta_cap = histo_v4l2_get_format,449 .vidioc_reqbufs = vb2_ioctl_reqbufs,450 .vidioc_querybuf = vb2_ioctl_querybuf,451 .vidioc_qbuf = vb2_ioctl_qbuf,452 .vidioc_dqbuf = vb2_ioctl_dqbuf,453 .vidioc_create_bufs = vb2_ioctl_create_bufs,454 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,455 .vidioc_streamon = vb2_ioctl_streamon,456 .vidioc_streamoff = vb2_ioctl_streamoff,457};458 459/* -----------------------------------------------------------------------------460 * V4L2 File Operations461 */462 463static const struct v4l2_file_operations histo_v4l2_fops = {464 .owner = THIS_MODULE,465 .unlocked_ioctl = video_ioctl2,466 .open = v4l2_fh_open,467 .release = vb2_fop_release,468 .poll = vb2_fop_poll,469 .mmap = vb2_fop_mmap,470};471 472static void vsp1_histogram_cleanup(struct vsp1_histogram *histo)473{474 if (video_is_registered(&histo->video))475 video_unregister_device(&histo->video);476 477 media_entity_cleanup(&histo->video.entity);478}479 480void vsp1_histogram_destroy(struct vsp1_entity *entity)481{482 struct vsp1_histogram *histo = subdev_to_histo(&entity->subdev);483 484 vsp1_histogram_cleanup(histo);485}486 487int vsp1_histogram_init(struct vsp1_device *vsp1, struct vsp1_histogram *histo,488 enum vsp1_entity_type type, const char *name,489 const struct vsp1_entity_operations *ops,490 const unsigned int *formats, unsigned int num_formats,491 size_t data_size, u32 meta_format)492{493 int ret;494 495 histo->formats = formats;496 histo->num_formats = num_formats;497 histo->data_size = data_size;498 histo->meta_format = meta_format;499 500 histo->pad.flags = MEDIA_PAD_FL_SINK;501 histo->video.vfl_dir = VFL_DIR_RX;502 503 mutex_init(&histo->lock);504 spin_lock_init(&histo->irqlock);505 INIT_LIST_HEAD(&histo->irqqueue);506 init_waitqueue_head(&histo->wait_queue);507 508 /* Initialize the VSP entity... */509 histo->entity.ops = ops;510 histo->entity.type = type;511 512 ret = vsp1_entity_init(vsp1, &histo->entity, name, 2, &histo_ops,513 MEDIA_ENT_F_PROC_VIDEO_STATISTICS);514 if (ret < 0)515 return ret;516 517 /* ... and the media entity... */518 ret = media_entity_pads_init(&histo->video.entity, 1, &histo->pad);519 if (ret < 0)520 return ret;521 522 /* ... and the video node... */523 histo->video.v4l2_dev = &vsp1->v4l2_dev;524 histo->video.fops = &histo_v4l2_fops;525 snprintf(histo->video.name, sizeof(histo->video.name),526 "%s histo", histo->entity.subdev.name);527 histo->video.vfl_type = VFL_TYPE_VIDEO;528 histo->video.release = video_device_release_empty;529 histo->video.ioctl_ops = &histo_v4l2_ioctl_ops;530 histo->video.device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING;531 532 video_set_drvdata(&histo->video, histo);533 534 /* ... and the buffers queue... */535 histo->queue.type = V4L2_BUF_TYPE_META_CAPTURE;536 histo->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;537 histo->queue.lock = &histo->lock;538 histo->queue.drv_priv = histo;539 histo->queue.buf_struct_size = sizeof(struct vsp1_histogram_buffer);540 histo->queue.ops = &histo_video_queue_qops;541 histo->queue.mem_ops = &vb2_vmalloc_memops;542 histo->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;543 histo->queue.dev = vsp1->dev;544 ret = vb2_queue_init(&histo->queue);545 if (ret < 0) {546 dev_err(vsp1->dev, "failed to initialize vb2 queue\n");547 goto error;548 }549 550 /* ... and register the video device. */551 histo->video.queue = &histo->queue;552 ret = video_register_device(&histo->video, VFL_TYPE_VIDEO, -1);553 if (ret < 0) {554 dev_err(vsp1->dev, "failed to register video device\n");555 goto error;556 }557 558 return 0;559 560error:561 vsp1_histogram_cleanup(histo);562 return ret;563}564