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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * V4L2 deinterlacing support.4 *5 * Copyright (c) 2012 Vista Silicon S.L.6 * Javier Martin <javier.martin@vista-silicon.com>7 */8 9#include <linux/module.h>10#include <linux/slab.h>11#include <linux/interrupt.h>12#include <linux/dmaengine.h>13#include <linux/platform_device.h>14 15#include <media/v4l2-mem2mem.h>16#include <media/v4l2-device.h>17#include <media/v4l2-ioctl.h>18#include <media/videobuf2-dma-contig.h>19 20#define MEM2MEM_TEST_MODULE_NAME "mem2mem-deinterlace"21 22MODULE_DESCRIPTION("mem2mem device which supports deinterlacing using dmaengine");23MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");24MODULE_LICENSE("GPL");25MODULE_VERSION("0.0.1");26 27static bool debug;28module_param(debug, bool, 0644);29 30/* Flags that indicate a format can be used for capture/output */31#define MEM2MEM_CAPTURE (1 << 0)32#define MEM2MEM_OUTPUT (1 << 1)33 34#define MEM2MEM_NAME "m2m-deinterlace"35 36#define dprintk(dev, fmt, arg...) \37 v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)38 39struct deinterlace_fmt {40 u32 fourcc;41 /* Types the format can be used for */42 u32 types;43};44 45static struct deinterlace_fmt formats[] = {46 {47 .fourcc = V4L2_PIX_FMT_YUV420,48 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,49 },50 {51 .fourcc = V4L2_PIX_FMT_YUYV,52 .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,53 },54};55 56#define NUM_FORMATS ARRAY_SIZE(formats)57 58/* Per-queue, driver-specific private data */59struct deinterlace_q_data {60 unsigned int width;61 unsigned int height;62 unsigned int sizeimage;63 struct deinterlace_fmt *fmt;64 enum v4l2_field field;65};66 67enum {68 V4L2_M2M_SRC = 0,69 V4L2_M2M_DST = 1,70};71 72enum {73 YUV420_DMA_Y_ODD,74 YUV420_DMA_Y_EVEN,75 YUV420_DMA_U_ODD,76 YUV420_DMA_U_EVEN,77 YUV420_DMA_V_ODD,78 YUV420_DMA_V_EVEN,79 YUV420_DMA_Y_ODD_DOUBLING,80 YUV420_DMA_U_ODD_DOUBLING,81 YUV420_DMA_V_ODD_DOUBLING,82 YUYV_DMA_ODD,83 YUYV_DMA_EVEN,84 YUYV_DMA_EVEN_DOUBLING,85};86 87/* Source and destination queue data */88static struct deinterlace_q_data q_data[2];89 90static struct deinterlace_q_data *get_q_data(enum v4l2_buf_type type)91{92 switch (type) {93 case V4L2_BUF_TYPE_VIDEO_OUTPUT:94 return &q_data[V4L2_M2M_SRC];95 case V4L2_BUF_TYPE_VIDEO_CAPTURE:96 return &q_data[V4L2_M2M_DST];97 default:98 BUG();99 }100 return NULL;101}102 103static struct deinterlace_fmt *find_format(struct v4l2_format *f)104{105 struct deinterlace_fmt *fmt;106 unsigned int k;107 108 for (k = 0; k < NUM_FORMATS; k++) {109 fmt = &formats[k];110 if ((fmt->types & f->type) &&111 (fmt->fourcc == f->fmt.pix.pixelformat))112 break;113 }114 115 if (k == NUM_FORMATS)116 return NULL;117 118 return &formats[k];119}120 121struct deinterlace_dev {122 struct v4l2_device v4l2_dev;123 struct video_device vfd;124 125 atomic_t busy;126 struct mutex dev_mutex;127 spinlock_t irqlock;128 129 struct dma_chan *dma_chan;130 131 struct v4l2_m2m_dev *m2m_dev;132};133 134struct deinterlace_ctx {135 struct v4l2_fh fh;136 struct deinterlace_dev *dev;137 138 /* Abort requested by m2m */139 int aborting;140 enum v4l2_colorspace colorspace;141 dma_cookie_t cookie;142 struct dma_interleaved_template *xt;143};144 145/*146 * mem2mem callbacks147 */148static int deinterlace_job_ready(void *priv)149{150 struct deinterlace_ctx *ctx = priv;151 struct deinterlace_dev *pcdev = ctx->dev;152 153 if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) > 0 &&154 v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) > 0 &&155 !atomic_read(&ctx->dev->busy)) {156 dprintk(pcdev, "Task ready\n");157 return 1;158 }159 160 dprintk(pcdev, "Task not ready to run\n");161 162 return 0;163}164 165static void deinterlace_job_abort(void *priv)166{167 struct deinterlace_ctx *ctx = priv;168 struct deinterlace_dev *pcdev = ctx->dev;169 170 ctx->aborting = 1;171 172 dprintk(pcdev, "Aborting task\n");173 174 v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->fh.m2m_ctx);175}176 177static void dma_callback(void *data)178{179 struct deinterlace_ctx *curr_ctx = data;180 struct deinterlace_dev *pcdev = curr_ctx->dev;181 struct vb2_v4l2_buffer *src_vb, *dst_vb;182 183 atomic_set(&pcdev->busy, 0);184 185 src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);186 dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);187 188 dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;189 dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;190 dst_vb->flags |=191 src_vb->flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;192 dst_vb->timecode = src_vb->timecode;193 194 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);195 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);196 197 v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->fh.m2m_ctx);198 199 dprintk(pcdev, "dma transfers completed.\n");200}201 202static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op,203 int do_callback)204{205 struct deinterlace_q_data *s_q_data;206 struct vb2_v4l2_buffer *src_buf, *dst_buf;207 struct deinterlace_dev *pcdev = ctx->dev;208 struct dma_chan *chan = pcdev->dma_chan;209 struct dma_device *dmadev = chan->device;210 struct dma_async_tx_descriptor *tx;211 unsigned int s_width, s_height;212 unsigned int s_size;213 dma_addr_t p_in, p_out;214 enum dma_ctrl_flags flags;215 216 src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);217 dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);218 219 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);220 s_width = s_q_data->width;221 s_height = s_q_data->height;222 s_size = s_width * s_height;223 224 p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(&src_buf->vb2_buf, 0);225 p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf,226 0);227 if (!p_in || !p_out) {228 v4l2_err(&pcdev->v4l2_dev,229 "Acquiring kernel pointers to buffers failed\n");230 return;231 }232 233 switch (op) {234 case YUV420_DMA_Y_ODD:235 ctx->xt->numf = s_height / 2;236 ctx->xt->sgl[0].size = s_width;237 ctx->xt->sgl[0].icg = s_width;238 ctx->xt->src_start = p_in;239 ctx->xt->dst_start = p_out;240 break;241 case YUV420_DMA_Y_EVEN:242 ctx->xt->numf = s_height / 2;243 ctx->xt->sgl[0].size = s_width;244 ctx->xt->sgl[0].icg = s_width;245 ctx->xt->src_start = p_in + s_size / 2;246 ctx->xt->dst_start = p_out + s_width;247 break;248 case YUV420_DMA_U_ODD:249 ctx->xt->numf = s_height / 4;250 ctx->xt->sgl[0].size = s_width / 2;251 ctx->xt->sgl[0].icg = s_width / 2;252 ctx->xt->src_start = p_in + s_size;253 ctx->xt->dst_start = p_out + s_size;254 break;255 case YUV420_DMA_U_EVEN:256 ctx->xt->numf = s_height / 4;257 ctx->xt->sgl[0].size = s_width / 2;258 ctx->xt->sgl[0].icg = s_width / 2;259 ctx->xt->src_start = p_in + (9 * s_size) / 8;260 ctx->xt->dst_start = p_out + s_size + s_width / 2;261 break;262 case YUV420_DMA_V_ODD:263 ctx->xt->numf = s_height / 4;264 ctx->xt->sgl[0].size = s_width / 2;265 ctx->xt->sgl[0].icg = s_width / 2;266 ctx->xt->src_start = p_in + (5 * s_size) / 4;267 ctx->xt->dst_start = p_out + (5 * s_size) / 4;268 break;269 case YUV420_DMA_V_EVEN:270 ctx->xt->numf = s_height / 4;271 ctx->xt->sgl[0].size = s_width / 2;272 ctx->xt->sgl[0].icg = s_width / 2;273 ctx->xt->src_start = p_in + (11 * s_size) / 8;274 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;275 break;276 case YUV420_DMA_Y_ODD_DOUBLING:277 ctx->xt->numf = s_height / 2;278 ctx->xt->sgl[0].size = s_width;279 ctx->xt->sgl[0].icg = s_width;280 ctx->xt->src_start = p_in;281 ctx->xt->dst_start = p_out + s_width;282 break;283 case YUV420_DMA_U_ODD_DOUBLING:284 ctx->xt->numf = s_height / 4;285 ctx->xt->sgl[0].size = s_width / 2;286 ctx->xt->sgl[0].icg = s_width / 2;287 ctx->xt->src_start = p_in + s_size;288 ctx->xt->dst_start = p_out + s_size + s_width / 2;289 break;290 case YUV420_DMA_V_ODD_DOUBLING:291 ctx->xt->numf = s_height / 4;292 ctx->xt->sgl[0].size = s_width / 2;293 ctx->xt->sgl[0].icg = s_width / 2;294 ctx->xt->src_start = p_in + (5 * s_size) / 4;295 ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;296 break;297 case YUYV_DMA_ODD:298 ctx->xt->numf = s_height / 2;299 ctx->xt->sgl[0].size = s_width * 2;300 ctx->xt->sgl[0].icg = s_width * 2;301 ctx->xt->src_start = p_in;302 ctx->xt->dst_start = p_out;303 break;304 case YUYV_DMA_EVEN:305 ctx->xt->numf = s_height / 2;306 ctx->xt->sgl[0].size = s_width * 2;307 ctx->xt->sgl[0].icg = s_width * 2;308 ctx->xt->src_start = p_in + s_size;309 ctx->xt->dst_start = p_out + s_width * 2;310 break;311 case YUYV_DMA_EVEN_DOUBLING:312 default:313 ctx->xt->numf = s_height / 2;314 ctx->xt->sgl[0].size = s_width * 2;315 ctx->xt->sgl[0].icg = s_width * 2;316 ctx->xt->src_start = p_in;317 ctx->xt->dst_start = p_out + s_width * 2;318 break;319 }320 321 /* Common parameters for al transfers */322 ctx->xt->frame_size = 1;323 ctx->xt->dir = DMA_MEM_TO_MEM;324 ctx->xt->src_sgl = false;325 ctx->xt->dst_sgl = true;326 flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;327 328 tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags);329 if (tx == NULL) {330 v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n");331 return;332 }333 334 if (do_callback) {335 tx->callback = dma_callback;336 tx->callback_param = ctx;337 }338 339 ctx->cookie = dmaengine_submit(tx);340 if (dma_submit_error(ctx->cookie)) {341 v4l2_warn(&pcdev->v4l2_dev,342 "DMA submit error %d with src=0x%x dst=0x%x len=0x%x\n",343 ctx->cookie, (unsigned)p_in, (unsigned)p_out,344 s_size * 3/2);345 return;346 }347 348 dma_async_issue_pending(chan);349}350 351static void deinterlace_device_run(void *priv)352{353 struct deinterlace_ctx *ctx = priv;354 struct deinterlace_q_data *dst_q_data;355 356 atomic_set(&ctx->dev->busy, 1);357 358 dprintk(ctx->dev, "%s: DMA try issue.\n", __func__);359 360 dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);361 362 /*363 * 4 possible field conversions are possible at the moment:364 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_INTERLACED_TB:365 * two separate fields in the same input buffer are interlaced366 * in the output buffer using weaving. Top field comes first.367 * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_NONE:368 * top field from the input buffer is copied to the output buffer369 * using line doubling. Bottom field from the input buffer is discarded.370 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_INTERLACED_BT:371 * two separate fields in the same input buffer are interlaced372 * in the output buffer using weaving. Bottom field comes first.373 * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_NONE:374 * bottom field from the input buffer is copied to the output buffer375 * using line doubling. Top field from the input buffer is discarded.376 */377 switch (dst_q_data->fmt->fourcc) {378 case V4L2_PIX_FMT_YUV420:379 switch (dst_q_data->field) {380 case V4L2_FIELD_INTERLACED_TB:381 case V4L2_FIELD_INTERLACED_BT:382 dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n",383 __func__);384 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);385 deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0);386 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);387 deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0);388 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);389 deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1);390 break;391 case V4L2_FIELD_NONE:392 default:393 dprintk(ctx->dev, "%s: yuv420 interlaced line doubling.\n",394 __func__);395 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);396 deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING, 0);397 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);398 deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING, 0);399 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);400 deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING, 1);401 break;402 }403 break;404 case V4L2_PIX_FMT_YUYV:405 default:406 switch (dst_q_data->field) {407 case V4L2_FIELD_INTERLACED_TB:408 case V4L2_FIELD_INTERLACED_BT:409 dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n",410 __func__);411 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);412 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1);413 break;414 case V4L2_FIELD_NONE:415 default:416 dprintk(ctx->dev, "%s: yuyv interlaced line doubling.\n",417 __func__);418 deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);419 deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1);420 break;421 }422 break;423 }424 425 dprintk(ctx->dev, "%s: DMA issue done.\n", __func__);426}427 428/*429 * video ioctls430 */431static int vidioc_querycap(struct file *file, void *priv,432 struct v4l2_capability *cap)433{434 strscpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver));435 strscpy(cap->card, MEM2MEM_NAME, sizeof(cap->card));436 strscpy(cap->bus_info, MEM2MEM_NAME, sizeof(cap->bus_info));437 return 0;438}439 440static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)441{442 int i, num;443 struct deinterlace_fmt *fmt;444 445 num = 0;446 447 for (i = 0; i < NUM_FORMATS; ++i) {448 if (formats[i].types & type) {449 /* index-th format of type type found ? */450 if (num == f->index)451 break;452 /* Correct type but haven't reached our index yet,453 * just increment per-type index */454 ++num;455 }456 }457 458 if (i < NUM_FORMATS) {459 /* Format found */460 fmt = &formats[i];461 f->pixelformat = fmt->fourcc;462 return 0;463 }464 465 /* Format not found */466 return -EINVAL;467}468 469static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,470 struct v4l2_fmtdesc *f)471{472 return enum_fmt(f, MEM2MEM_CAPTURE);473}474 475static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,476 struct v4l2_fmtdesc *f)477{478 return enum_fmt(f, MEM2MEM_OUTPUT);479}480 481static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)482{483 struct vb2_queue *vq;484 struct deinterlace_q_data *q_data;485 486 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);487 if (!vq)488 return -EINVAL;489 490 q_data = get_q_data(f->type);491 492 f->fmt.pix.width = q_data->width;493 f->fmt.pix.height = q_data->height;494 f->fmt.pix.field = q_data->field;495 f->fmt.pix.pixelformat = q_data->fmt->fourcc;496 497 switch (q_data->fmt->fourcc) {498 case V4L2_PIX_FMT_YUV420:499 f->fmt.pix.bytesperline = q_data->width * 3 / 2;500 break;501 case V4L2_PIX_FMT_YUYV:502 default:503 f->fmt.pix.bytesperline = q_data->width * 2;504 }505 506 f->fmt.pix.sizeimage = q_data->sizeimage;507 f->fmt.pix.colorspace = ctx->colorspace;508 509 return 0;510}511 512static int vidioc_g_fmt_vid_out(struct file *file, void *priv,513 struct v4l2_format *f)514{515 return vidioc_g_fmt(priv, f);516}517 518static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,519 struct v4l2_format *f)520{521 return vidioc_g_fmt(priv, f);522}523 524static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt)525{526 switch (f->fmt.pix.pixelformat) {527 case V4L2_PIX_FMT_YUV420:528 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;529 break;530 case V4L2_PIX_FMT_YUYV:531 default:532 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;533 }534 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;535 536 return 0;537}538 539static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,540 struct v4l2_format *f)541{542 struct deinterlace_fmt *fmt;543 struct deinterlace_ctx *ctx = priv;544 545 fmt = find_format(f);546 if (!fmt || !(fmt->types & MEM2MEM_CAPTURE))547 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;548 549 f->fmt.pix.colorspace = ctx->colorspace;550 551 if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB &&552 f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT &&553 f->fmt.pix.field != V4L2_FIELD_NONE)554 f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;555 556 return vidioc_try_fmt(f, fmt);557}558 559static int vidioc_try_fmt_vid_out(struct file *file, void *priv,560 struct v4l2_format *f)561{562 struct deinterlace_fmt *fmt;563 564 fmt = find_format(f);565 if (!fmt || !(fmt->types & MEM2MEM_OUTPUT))566 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;567 568 if (!f->fmt.pix.colorspace)569 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;570 571 if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB &&572 f->fmt.pix.field != V4L2_FIELD_SEQ_BT)573 f->fmt.pix.field = V4L2_FIELD_SEQ_TB;574 575 return vidioc_try_fmt(f, fmt);576}577 578static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)579{580 struct deinterlace_q_data *q_data;581 struct vb2_queue *vq;582 583 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);584 if (!vq)585 return -EINVAL;586 587 q_data = get_q_data(f->type);588 if (!q_data)589 return -EINVAL;590 591 if (vb2_is_busy(vq)) {592 v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);593 return -EBUSY;594 }595 596 q_data->fmt = find_format(f);597 if (!q_data->fmt) {598 v4l2_err(&ctx->dev->v4l2_dev,599 "Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n",600 f->type, f->fmt.pix.width, f->fmt.pix.height,601 f->fmt.pix.pixelformat, f->fmt.pix.field);602 return -EINVAL;603 }604 605 q_data->width = f->fmt.pix.width;606 q_data->height = f->fmt.pix.height;607 q_data->field = f->fmt.pix.field;608 609 switch (f->fmt.pix.pixelformat) {610 case V4L2_PIX_FMT_YUV420:611 f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;612 q_data->sizeimage = (q_data->width * q_data->height * 3) / 2;613 break;614 case V4L2_PIX_FMT_YUYV:615 default:616 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;617 q_data->sizeimage = q_data->width * q_data->height * 2;618 }619 620 dprintk(ctx->dev,621 "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n",622 f->type, q_data->width, q_data->height, q_data->fmt->fourcc,623 q_data->field);624 625 return 0;626}627 628static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,629 struct v4l2_format *f)630{631 int ret;632 633 ret = vidioc_try_fmt_vid_cap(file, priv, f);634 if (ret)635 return ret;636 return vidioc_s_fmt(priv, f);637}638 639static int vidioc_s_fmt_vid_out(struct file *file, void *priv,640 struct v4l2_format *f)641{642 struct deinterlace_ctx *ctx = priv;643 int ret;644 645 ret = vidioc_try_fmt_vid_out(file, priv, f);646 if (ret)647 return ret;648 649 ret = vidioc_s_fmt(priv, f);650 if (!ret)651 ctx->colorspace = f->fmt.pix.colorspace;652 653 return ret;654}655 656static int vidioc_streamon(struct file *file, void *priv,657 enum v4l2_buf_type type)658{659 struct deinterlace_q_data *s_q_data, *d_q_data;660 struct deinterlace_ctx *ctx = priv;661 662 s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);663 d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);664 665 /* Check that src and dst queues have the same pix format */666 if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) {667 v4l2_err(&ctx->dev->v4l2_dev,668 "src and dst formats don't match.\n");669 return -EINVAL;670 }671 672 /* Check that input and output deinterlacing types are compatible */673 switch (s_q_data->field) {674 case V4L2_FIELD_SEQ_BT:675 if (d_q_data->field != V4L2_FIELD_NONE &&676 d_q_data->field != V4L2_FIELD_INTERLACED_BT) {677 v4l2_err(&ctx->dev->v4l2_dev,678 "src and dst field conversion [(%d)->(%d)] not supported.\n",679 s_q_data->field, d_q_data->field);680 return -EINVAL;681 }682 break;683 case V4L2_FIELD_SEQ_TB:684 if (d_q_data->field != V4L2_FIELD_NONE &&685 d_q_data->field != V4L2_FIELD_INTERLACED_TB) {686 v4l2_err(&ctx->dev->v4l2_dev,687 "src and dst field conversion [(%d)->(%d)] not supported.\n",688 s_q_data->field, d_q_data->field);689 return -EINVAL;690 }691 break;692 default:693 return -EINVAL;694 }695 696 return v4l2_m2m_streamon(file, ctx->fh.m2m_ctx, type);697}698 699static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = {700 .vidioc_querycap = vidioc_querycap,701 702 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,703 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,704 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,705 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,706 707 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,708 .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,709 .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,710 .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,711 712 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,713 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,714 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,715 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,716 .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,717 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,718 719 .vidioc_streamon = vidioc_streamon,720 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,721};722 723 724/*725 * Queue operations726 */727static int deinterlace_queue_setup(struct vb2_queue *vq,728 unsigned int *nbuffers, unsigned int *nplanes,729 unsigned int sizes[], struct device *alloc_devs[])730{731 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq);732 struct deinterlace_q_data *q_data;733 unsigned int size, count = *nbuffers;734 735 q_data = get_q_data(vq->type);736 737 switch (q_data->fmt->fourcc) {738 case V4L2_PIX_FMT_YUV420:739 size = q_data->width * q_data->height * 3 / 2;740 break;741 case V4L2_PIX_FMT_YUYV:742 default:743 size = q_data->width * q_data->height * 2;744 }745 746 *nplanes = 1;747 *nbuffers = count;748 sizes[0] = size;749 750 dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);751 752 return 0;753}754 755static int deinterlace_buf_prepare(struct vb2_buffer *vb)756{757 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);758 struct deinterlace_q_data *q_data;759 760 dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);761 762 q_data = get_q_data(vb->vb2_queue->type);763 764 if (vb2_plane_size(vb, 0) < q_data->sizeimage) {765 dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",766 __func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);767 return -EINVAL;768 }769 770 vb2_set_plane_payload(vb, 0, q_data->sizeimage);771 772 return 0;773}774 775static void deinterlace_buf_queue(struct vb2_buffer *vb)776{777 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);778 struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);779 780 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);781}782 783static const struct vb2_ops deinterlace_qops = {784 .queue_setup = deinterlace_queue_setup,785 .buf_prepare = deinterlace_buf_prepare,786 .buf_queue = deinterlace_buf_queue,787 .wait_prepare = vb2_ops_wait_prepare,788 .wait_finish = vb2_ops_wait_finish,789};790 791static int queue_init(void *priv, struct vb2_queue *src_vq,792 struct vb2_queue *dst_vq)793{794 struct deinterlace_ctx *ctx = priv;795 int ret;796 797 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;798 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;799 src_vq->drv_priv = ctx;800 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);801 src_vq->ops = &deinterlace_qops;802 src_vq->mem_ops = &vb2_dma_contig_memops;803 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;804 src_vq->dev = ctx->dev->v4l2_dev.dev;805 src_vq->lock = &ctx->dev->dev_mutex;806 q_data[V4L2_M2M_SRC].fmt = &formats[0];807 q_data[V4L2_M2M_SRC].width = 640;808 q_data[V4L2_M2M_SRC].height = 480;809 q_data[V4L2_M2M_SRC].sizeimage = (640 * 480 * 3) / 2;810 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_SEQ_TB;811 812 ret = vb2_queue_init(src_vq);813 if (ret)814 return ret;815 816 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;817 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;818 dst_vq->drv_priv = ctx;819 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);820 dst_vq->ops = &deinterlace_qops;821 dst_vq->mem_ops = &vb2_dma_contig_memops;822 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;823 dst_vq->dev = ctx->dev->v4l2_dev.dev;824 dst_vq->lock = &ctx->dev->dev_mutex;825 q_data[V4L2_M2M_DST].fmt = &formats[0];826 q_data[V4L2_M2M_DST].width = 640;827 q_data[V4L2_M2M_DST].height = 480;828 q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2;829 q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB;830 831 return vb2_queue_init(dst_vq);832}833 834/*835 * File operations836 */837static int deinterlace_open(struct file *file)838{839 struct deinterlace_dev *pcdev = video_drvdata(file);840 struct deinterlace_ctx *ctx = NULL;841 842 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);843 if (!ctx)844 return -ENOMEM;845 846 v4l2_fh_init(&ctx->fh, video_devdata(file));847 file->private_data = &ctx->fh;848 ctx->dev = pcdev;849 850 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);851 if (IS_ERR(ctx->fh.m2m_ctx)) {852 int ret = PTR_ERR(ctx->fh.m2m_ctx);853 854 kfree(ctx);855 return ret;856 }857 858 ctx->xt = kzalloc(sizeof(struct dma_interleaved_template) +859 sizeof(struct data_chunk), GFP_KERNEL);860 if (!ctx->xt) {861 kfree(ctx);862 return -ENOMEM;863 }864 865 ctx->colorspace = V4L2_COLORSPACE_REC709;866 v4l2_fh_add(&ctx->fh);867 868 dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n",869 ctx, ctx->fh.m2m_ctx);870 871 return 0;872}873 874static int deinterlace_release(struct file *file)875{876 struct deinterlace_dev *pcdev = video_drvdata(file);877 struct deinterlace_ctx *ctx = file->private_data;878 879 dprintk(pcdev, "Releasing instance %p\n", ctx);880 881 v4l2_fh_del(&ctx->fh);882 v4l2_fh_exit(&ctx->fh);883 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);884 kfree(ctx->xt);885 kfree(ctx);886 887 return 0;888}889 890static const struct v4l2_file_operations deinterlace_fops = {891 .owner = THIS_MODULE,892 .open = deinterlace_open,893 .release = deinterlace_release,894 .poll = v4l2_m2m_fop_poll,895 .unlocked_ioctl = video_ioctl2,896 .mmap = v4l2_m2m_fop_mmap,897};898 899static const struct video_device deinterlace_videodev = {900 .name = MEM2MEM_NAME,901 .fops = &deinterlace_fops,902 .ioctl_ops = &deinterlace_ioctl_ops,903 .minor = -1,904 .release = video_device_release_empty,905 .vfl_dir = VFL_DIR_M2M,906 .device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING,907};908 909static const struct v4l2_m2m_ops m2m_ops = {910 .device_run = deinterlace_device_run,911 .job_ready = deinterlace_job_ready,912 .job_abort = deinterlace_job_abort,913};914 915static int deinterlace_probe(struct platform_device *pdev)916{917 struct deinterlace_dev *pcdev;918 struct video_device *vfd;919 dma_cap_mask_t mask;920 int ret = 0;921 922 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);923 if (!pcdev)924 return -ENOMEM;925 926 spin_lock_init(&pcdev->irqlock);927 928 dma_cap_zero(mask);929 dma_cap_set(DMA_INTERLEAVE, mask);930 pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev);931 if (!pcdev->dma_chan)932 return -ENODEV;933 934 if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) {935 dev_err(&pdev->dev, "DMA does not support INTERLEAVE\n");936 ret = -ENODEV;937 goto rel_dma;938 }939 940 ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);941 if (ret)942 goto rel_dma;943 944 atomic_set(&pcdev->busy, 0);945 mutex_init(&pcdev->dev_mutex);946 947 vfd = &pcdev->vfd;948 *vfd = deinterlace_videodev;949 vfd->lock = &pcdev->dev_mutex;950 vfd->v4l2_dev = &pcdev->v4l2_dev;951 952 ret = video_register_device(vfd, VFL_TYPE_VIDEO, 0);953 if (ret) {954 v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");955 goto unreg_dev;956 }957 958 video_set_drvdata(vfd, pcdev);959 v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME960 " Device registered as /dev/video%d\n", vfd->num);961 962 platform_set_drvdata(pdev, pcdev);963 964 pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);965 if (IS_ERR(pcdev->m2m_dev)) {966 v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");967 ret = PTR_ERR(pcdev->m2m_dev);968 goto err_m2m;969 }970 971 return 0;972 973err_m2m:974 video_unregister_device(&pcdev->vfd);975unreg_dev:976 v4l2_device_unregister(&pcdev->v4l2_dev);977rel_dma:978 dma_release_channel(pcdev->dma_chan);979 980 return ret;981}982 983static void deinterlace_remove(struct platform_device *pdev)984{985 struct deinterlace_dev *pcdev = platform_get_drvdata(pdev);986 987 v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);988 v4l2_m2m_release(pcdev->m2m_dev);989 video_unregister_device(&pcdev->vfd);990 v4l2_device_unregister(&pcdev->v4l2_dev);991 dma_release_channel(pcdev->dma_chan);992}993 994static struct platform_driver deinterlace_pdrv = {995 .probe = deinterlace_probe,996 .remove_new = deinterlace_remove,997 .driver = {998 .name = MEM2MEM_NAME,999 },1000};1001module_platform_driver(deinterlace_pdrv);1002 1003