linux/drivers/media/platform/exynos-gsc/gsc-m2m.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Copyright (c) 2011 - 2012 Samsung Electronics Co., Ltd.
   4 *              http://www.samsung.com
   5 *
   6 * Samsung EXYNOS5 SoC series G-Scaler driver
   7 */
   8
   9#include <linux/module.h>
  10#include <linux/kernel.h>
  11#include <linux/types.h>
  12#include <linux/errno.h>
  13#include <linux/bug.h>
  14#include <linux/interrupt.h>
  15#include <linux/workqueue.h>
  16#include <linux/device.h>
  17#include <linux/platform_device.h>
  18#include <linux/list.h>
  19#include <linux/io.h>
  20#include <linux/slab.h>
  21#include <linux/clk.h>
  22
  23#include <media/v4l2-ioctl.h>
  24
  25#include "gsc-core.h"
  26
  27static int gsc_m2m_ctx_stop_req(struct gsc_ctx *ctx)
  28{
  29        struct gsc_ctx *curr_ctx;
  30        struct gsc_dev *gsc = ctx->gsc_dev;
  31        int ret;
  32
  33        curr_ctx = v4l2_m2m_get_curr_priv(gsc->m2m.m2m_dev);
  34        if (!gsc_m2m_pending(gsc) || (curr_ctx != ctx))
  35                return 0;
  36
  37        gsc_ctx_state_lock_set(GSC_CTX_STOP_REQ, ctx);
  38        ret = wait_event_timeout(gsc->irq_queue,
  39                        !gsc_ctx_state_is_set(GSC_CTX_STOP_REQ, ctx),
  40                        GSC_SHUTDOWN_TIMEOUT);
  41
  42        return ret == 0 ? -ETIMEDOUT : ret;
  43}
  44
  45static void __gsc_m2m_job_abort(struct gsc_ctx *ctx)
  46{
  47        int ret;
  48
  49        ret = gsc_m2m_ctx_stop_req(ctx);
  50        if ((ret == -ETIMEDOUT) || (ctx->state & GSC_CTX_ABORT)) {
  51                gsc_ctx_state_lock_clear(GSC_CTX_STOP_REQ | GSC_CTX_ABORT, ctx);
  52                gsc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
  53        }
  54}
  55
  56static int gsc_m2m_start_streaming(struct vb2_queue *q, unsigned int count)
  57{
  58        struct gsc_ctx *ctx = q->drv_priv;
  59        int ret;
  60
  61        ret = pm_runtime_get_sync(&ctx->gsc_dev->pdev->dev);
  62        return ret > 0 ? 0 : ret;
  63}
  64
  65static void __gsc_m2m_cleanup_queue(struct gsc_ctx *ctx)
  66{
  67        struct vb2_v4l2_buffer *src_vb, *dst_vb;
  68
  69        while (v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) > 0) {
  70                src_vb = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
  71                v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_ERROR);
  72        }
  73
  74        while (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) > 0) {
  75                dst_vb = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);
  76                v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_ERROR);
  77        }
  78}
  79
  80static void gsc_m2m_stop_streaming(struct vb2_queue *q)
  81{
  82        struct gsc_ctx *ctx = q->drv_priv;
  83
  84        __gsc_m2m_job_abort(ctx);
  85
  86        __gsc_m2m_cleanup_queue(ctx);
  87
  88        pm_runtime_put(&ctx->gsc_dev->pdev->dev);
  89}
  90
  91void gsc_m2m_job_finish(struct gsc_ctx *ctx, int vb_state)
  92{
  93        struct vb2_v4l2_buffer *src_vb, *dst_vb;
  94
  95        if (!ctx || !ctx->m2m_ctx)
  96                return;
  97
  98        src_vb = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
  99        dst_vb = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);
 100
 101        if (src_vb && dst_vb) {
 102                dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
 103                dst_vb->timecode = src_vb->timecode;
 104                dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
 105                dst_vb->flags |=
 106                        src_vb->flags
 107                        & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
 108
 109                v4l2_m2m_buf_done(src_vb, vb_state);
 110                v4l2_m2m_buf_done(dst_vb, vb_state);
 111
 112                v4l2_m2m_job_finish(ctx->gsc_dev->m2m.m2m_dev,
 113                                    ctx->m2m_ctx);
 114        }
 115}
 116
 117static void gsc_m2m_job_abort(void *priv)
 118{
 119        __gsc_m2m_job_abort((struct gsc_ctx *)priv);
 120}
 121
 122static int gsc_get_bufs(struct gsc_ctx *ctx)
 123{
 124        struct gsc_frame *s_frame, *d_frame;
 125        struct vb2_v4l2_buffer *src_vb, *dst_vb;
 126        int ret;
 127
 128        s_frame = &ctx->s_frame;
 129        d_frame = &ctx->d_frame;
 130
 131        src_vb = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
 132        ret = gsc_prepare_addr(ctx, &src_vb->vb2_buf, s_frame, &s_frame->addr);
 133        if (ret)
 134                return ret;
 135
 136        dst_vb = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
 137        ret = gsc_prepare_addr(ctx, &dst_vb->vb2_buf, d_frame, &d_frame->addr);
 138        if (ret)
 139                return ret;
 140
 141        dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
 142
 143        return 0;
 144}
 145
 146static void gsc_m2m_device_run(void *priv)
 147{
 148        struct gsc_ctx *ctx = priv;
 149        struct gsc_dev *gsc;
 150        unsigned long flags;
 151        int ret;
 152        bool is_set = false;
 153
 154        if (WARN(!ctx, "null hardware context\n"))
 155                return;
 156
 157        gsc = ctx->gsc_dev;
 158        spin_lock_irqsave(&gsc->slock, flags);
 159
 160        set_bit(ST_M2M_PEND, &gsc->state);
 161
 162        /* Reconfigure hardware if the context has changed. */
 163        if (gsc->m2m.ctx != ctx) {
 164                pr_debug("gsc->m2m.ctx = 0x%p, current_ctx = 0x%p",
 165                                gsc->m2m.ctx, ctx);
 166                ctx->state |= GSC_PARAMS;
 167                gsc->m2m.ctx = ctx;
 168        }
 169
 170        is_set = ctx->state & GSC_CTX_STOP_REQ;
 171        if (is_set) {
 172                ctx->state &= ~GSC_CTX_STOP_REQ;
 173                ctx->state |= GSC_CTX_ABORT;
 174                wake_up(&gsc->irq_queue);
 175                goto put_device;
 176        }
 177
 178        ret = gsc_get_bufs(ctx);
 179        if (ret) {
 180                pr_err("Wrong address");
 181                goto put_device;
 182        }
 183
 184        gsc_set_prefbuf(gsc, &ctx->s_frame);
 185        gsc_hw_set_input_addr(gsc, &ctx->s_frame.addr, GSC_M2M_BUF_NUM);
 186        gsc_hw_set_output_addr(gsc, &ctx->d_frame.addr, GSC_M2M_BUF_NUM);
 187
 188        if (ctx->state & GSC_PARAMS) {
 189                gsc_hw_set_input_buf_masking(gsc, GSC_M2M_BUF_NUM, false);
 190                gsc_hw_set_output_buf_masking(gsc, GSC_M2M_BUF_NUM, false);
 191                gsc_hw_set_frm_done_irq_mask(gsc, false);
 192                gsc_hw_set_gsc_irq_enable(gsc, true);
 193
 194                if (gsc_set_scaler_info(ctx)) {
 195                        pr_err("Scaler setup error");
 196                        goto put_device;
 197                }
 198
 199                gsc_hw_set_input_path(ctx);
 200                gsc_hw_set_in_size(ctx);
 201                gsc_hw_set_in_image_format(ctx);
 202
 203                gsc_hw_set_output_path(ctx);
 204                gsc_hw_set_out_size(ctx);
 205                gsc_hw_set_out_image_format(ctx);
 206
 207                gsc_hw_set_prescaler(ctx);
 208                gsc_hw_set_mainscaler(ctx);
 209                gsc_hw_set_rotation(ctx);
 210                gsc_hw_set_global_alpha(ctx);
 211        }
 212
 213        /* update shadow registers */
 214        gsc_hw_set_sfr_update(ctx);
 215
 216        ctx->state &= ~GSC_PARAMS;
 217        gsc_hw_enable_control(gsc, true);
 218
 219        spin_unlock_irqrestore(&gsc->slock, flags);
 220        return;
 221
 222put_device:
 223        ctx->state &= ~GSC_PARAMS;
 224        spin_unlock_irqrestore(&gsc->slock, flags);
 225}
 226
 227static int gsc_m2m_queue_setup(struct vb2_queue *vq,
 228                        unsigned int *num_buffers, unsigned int *num_planes,
 229                        unsigned int sizes[], struct device *alloc_devs[])
 230{
 231        struct gsc_ctx *ctx = vb2_get_drv_priv(vq);
 232        struct gsc_frame *frame;
 233        int i;
 234
 235        frame = ctx_get_frame(ctx, vq->type);
 236        if (IS_ERR(frame))
 237                return PTR_ERR(frame);
 238
 239        if (!frame->fmt)
 240                return -EINVAL;
 241
 242        *num_planes = frame->fmt->num_planes;
 243        for (i = 0; i < frame->fmt->num_planes; i++)
 244                sizes[i] = frame->payload[i];
 245        return 0;
 246}
 247
 248static int gsc_m2m_buf_prepare(struct vb2_buffer *vb)
 249{
 250        struct gsc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
 251        struct gsc_frame *frame;
 252        int i;
 253
 254        frame = ctx_get_frame(ctx, vb->vb2_queue->type);
 255        if (IS_ERR(frame))
 256                return PTR_ERR(frame);
 257
 258        if (!V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
 259                for (i = 0; i < frame->fmt->num_planes; i++)
 260                        vb2_set_plane_payload(vb, i, frame->payload[i]);
 261        }
 262
 263        return 0;
 264}
 265
 266static void gsc_m2m_buf_queue(struct vb2_buffer *vb)
 267{
 268        struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 269        struct gsc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
 270
 271        pr_debug("ctx: %p, ctx->state: 0x%x", ctx, ctx->state);
 272
 273        if (ctx->m2m_ctx)
 274                v4l2_m2m_buf_queue(ctx->m2m_ctx, vbuf);
 275}
 276
 277static const struct vb2_ops gsc_m2m_qops = {
 278        .queue_setup     = gsc_m2m_queue_setup,
 279        .buf_prepare     = gsc_m2m_buf_prepare,
 280        .buf_queue       = gsc_m2m_buf_queue,
 281        .wait_prepare    = vb2_ops_wait_prepare,
 282        .wait_finish     = vb2_ops_wait_finish,
 283        .stop_streaming  = gsc_m2m_stop_streaming,
 284        .start_streaming = gsc_m2m_start_streaming,
 285};
 286
 287static int gsc_m2m_querycap(struct file *file, void *fh,
 288                           struct v4l2_capability *cap)
 289{
 290        struct gsc_ctx *ctx = fh_to_ctx(fh);
 291        struct gsc_dev *gsc = ctx->gsc_dev;
 292
 293        strscpy(cap->driver, GSC_MODULE_NAME, sizeof(cap->driver));
 294        strscpy(cap->card, GSC_MODULE_NAME " gscaler", sizeof(cap->card));
 295        snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
 296                 dev_name(&gsc->pdev->dev));
 297        return 0;
 298}
 299
 300static int gsc_m2m_enum_fmt(struct file *file, void *priv,
 301                            struct v4l2_fmtdesc *f)
 302{
 303        return gsc_enum_fmt(f);
 304}
 305
 306static int gsc_m2m_g_fmt_mplane(struct file *file, void *fh,
 307                             struct v4l2_format *f)
 308{
 309        struct gsc_ctx *ctx = fh_to_ctx(fh);
 310
 311        return gsc_g_fmt_mplane(ctx, f);
 312}
 313
 314static int gsc_m2m_try_fmt_mplane(struct file *file, void *fh,
 315                                  struct v4l2_format *f)
 316{
 317        struct gsc_ctx *ctx = fh_to_ctx(fh);
 318
 319        return gsc_try_fmt_mplane(ctx, f);
 320}
 321
 322static int gsc_m2m_s_fmt_mplane(struct file *file, void *fh,
 323                                 struct v4l2_format *f)
 324{
 325        struct gsc_ctx *ctx = fh_to_ctx(fh);
 326        struct vb2_queue *vq;
 327        struct gsc_frame *frame;
 328        struct v4l2_pix_format_mplane *pix;
 329        int i, ret = 0;
 330
 331        ret = gsc_m2m_try_fmt_mplane(file, fh, f);
 332        if (ret)
 333                return ret;
 334
 335        vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
 336
 337        if (vb2_is_streaming(vq)) {
 338                pr_err("queue (%d) busy", f->type);
 339                return -EBUSY;
 340        }
 341
 342        if (V4L2_TYPE_IS_OUTPUT(f->type))
 343                frame = &ctx->s_frame;
 344        else
 345                frame = &ctx->d_frame;
 346
 347        pix = &f->fmt.pix_mp;
 348        frame->fmt = find_fmt(&pix->pixelformat, NULL, 0);
 349        frame->colorspace = pix->colorspace;
 350        if (!frame->fmt)
 351                return -EINVAL;
 352
 353        for (i = 0; i < frame->fmt->num_planes; i++)
 354                frame->payload[i] = pix->plane_fmt[i].sizeimage;
 355
 356        gsc_set_frame_size(frame, pix->width, pix->height);
 357
 358        if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 359                gsc_ctx_state_lock_set(GSC_PARAMS | GSC_DST_FMT, ctx);
 360        else
 361                gsc_ctx_state_lock_set(GSC_PARAMS | GSC_SRC_FMT, ctx);
 362
 363        pr_debug("f_w: %d, f_h: %d", frame->f_width, frame->f_height);
 364
 365        return 0;
 366}
 367
 368static int gsc_m2m_reqbufs(struct file *file, void *fh,
 369                          struct v4l2_requestbuffers *reqbufs)
 370{
 371        struct gsc_ctx *ctx = fh_to_ctx(fh);
 372        struct gsc_dev *gsc = ctx->gsc_dev;
 373        u32 max_cnt;
 374
 375        max_cnt = (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ?
 376                gsc->variant->in_buf_cnt : gsc->variant->out_buf_cnt;
 377        if (reqbufs->count > max_cnt)
 378                return -EINVAL;
 379
 380        return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
 381}
 382
 383static int gsc_m2m_expbuf(struct file *file, void *fh,
 384                                struct v4l2_exportbuffer *eb)
 385{
 386        struct gsc_ctx *ctx = fh_to_ctx(fh);
 387        return v4l2_m2m_expbuf(file, ctx->m2m_ctx, eb);
 388}
 389
 390static int gsc_m2m_querybuf(struct file *file, void *fh,
 391                                        struct v4l2_buffer *buf)
 392{
 393        struct gsc_ctx *ctx = fh_to_ctx(fh);
 394        return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
 395}
 396
 397static int gsc_m2m_qbuf(struct file *file, void *fh,
 398                          struct v4l2_buffer *buf)
 399{
 400        struct gsc_ctx *ctx = fh_to_ctx(fh);
 401        return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
 402}
 403
 404static int gsc_m2m_dqbuf(struct file *file, void *fh,
 405                           struct v4l2_buffer *buf)
 406{
 407        struct gsc_ctx *ctx = fh_to_ctx(fh);
 408        return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
 409}
 410
 411static int gsc_m2m_streamon(struct file *file, void *fh,
 412                           enum v4l2_buf_type type)
 413{
 414        struct gsc_ctx *ctx = fh_to_ctx(fh);
 415
 416        /* The source and target color format need to be set */
 417        if (V4L2_TYPE_IS_OUTPUT(type)) {
 418                if (!gsc_ctx_state_is_set(GSC_SRC_FMT, ctx))
 419                        return -EINVAL;
 420        } else if (!gsc_ctx_state_is_set(GSC_DST_FMT, ctx)) {
 421                return -EINVAL;
 422        }
 423
 424        return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
 425}
 426
 427static int gsc_m2m_streamoff(struct file *file, void *fh,
 428                            enum v4l2_buf_type type)
 429{
 430        struct gsc_ctx *ctx = fh_to_ctx(fh);
 431        return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
 432}
 433
 434/* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
 435static int is_rectangle_enclosed(struct v4l2_rect *a, struct v4l2_rect *b)
 436{
 437        if (a->left < b->left || a->top < b->top)
 438                return 0;
 439
 440        if (a->left + a->width > b->left + b->width)
 441                return 0;
 442
 443        if (a->top + a->height > b->top + b->height)
 444                return 0;
 445
 446        return 1;
 447}
 448
 449static int gsc_m2m_g_selection(struct file *file, void *fh,
 450                        struct v4l2_selection *s)
 451{
 452        struct gsc_frame *frame;
 453        struct gsc_ctx *ctx = fh_to_ctx(fh);
 454
 455        if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
 456            (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT))
 457                return -EINVAL;
 458
 459        frame = ctx_get_frame(ctx, s->type);
 460        if (IS_ERR(frame))
 461                return PTR_ERR(frame);
 462
 463        switch (s->target) {
 464        case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 465        case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 466        case V4L2_SEL_TGT_CROP_BOUNDS:
 467        case V4L2_SEL_TGT_CROP_DEFAULT:
 468                s->r.left = 0;
 469                s->r.top = 0;
 470                s->r.width = frame->f_width;
 471                s->r.height = frame->f_height;
 472                return 0;
 473
 474        case V4L2_SEL_TGT_COMPOSE:
 475        case V4L2_SEL_TGT_CROP:
 476                s->r.left = frame->crop.left;
 477                s->r.top = frame->crop.top;
 478                s->r.width = frame->crop.width;
 479                s->r.height = frame->crop.height;
 480                return 0;
 481        }
 482
 483        return -EINVAL;
 484}
 485
 486static int gsc_m2m_s_selection(struct file *file, void *fh,
 487                                struct v4l2_selection *s)
 488{
 489        struct gsc_frame *frame;
 490        struct gsc_ctx *ctx = fh_to_ctx(fh);
 491        struct gsc_variant *variant = ctx->gsc_dev->variant;
 492        struct v4l2_selection sel = *s;
 493        int ret;
 494
 495        if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
 496            (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT))
 497                return -EINVAL;
 498
 499        ret = gsc_try_selection(ctx, &sel);
 500        if (ret)
 501                return ret;
 502
 503        if (s->flags & V4L2_SEL_FLAG_LE &&
 504            !is_rectangle_enclosed(&sel.r, &s->r))
 505                return -ERANGE;
 506
 507        if (s->flags & V4L2_SEL_FLAG_GE &&
 508            !is_rectangle_enclosed(&s->r, &sel.r))
 509                return -ERANGE;
 510
 511        s->r = sel.r;
 512
 513        switch (s->target) {
 514        case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 515        case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 516        case V4L2_SEL_TGT_COMPOSE:
 517                frame = &ctx->s_frame;
 518                break;
 519
 520        case V4L2_SEL_TGT_CROP_BOUNDS:
 521        case V4L2_SEL_TGT_CROP:
 522        case V4L2_SEL_TGT_CROP_DEFAULT:
 523                frame = &ctx->d_frame;
 524                break;
 525
 526        default:
 527                return -EINVAL;
 528        }
 529
 530        /* Check to see if scaling ratio is within supported range */
 531        if (gsc_ctx_state_is_set(GSC_DST_FMT | GSC_SRC_FMT, ctx)) {
 532                if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
 533                        ret = gsc_check_scaler_ratio(variant, sel.r.width,
 534                                sel.r.height, ctx->d_frame.crop.width,
 535                                ctx->d_frame.crop.height,
 536                                ctx->gsc_ctrls.rotate->val, ctx->out_path);
 537                } else {
 538                        ret = gsc_check_scaler_ratio(variant,
 539                                ctx->s_frame.crop.width,
 540                                ctx->s_frame.crop.height, sel.r.width,
 541                                sel.r.height, ctx->gsc_ctrls.rotate->val,
 542                                ctx->out_path);
 543                }
 544
 545                if (ret) {
 546                        pr_err("Out of scaler range");
 547                        return -EINVAL;
 548                }
 549        }
 550
 551        frame->crop = sel.r;
 552
 553        gsc_ctx_state_lock_set(GSC_PARAMS, ctx);
 554        return 0;
 555}
 556
 557static const struct v4l2_ioctl_ops gsc_m2m_ioctl_ops = {
 558        .vidioc_querycap                = gsc_m2m_querycap,
 559        .vidioc_enum_fmt_vid_cap        = gsc_m2m_enum_fmt,
 560        .vidioc_enum_fmt_vid_out        = gsc_m2m_enum_fmt,
 561        .vidioc_g_fmt_vid_cap_mplane    = gsc_m2m_g_fmt_mplane,
 562        .vidioc_g_fmt_vid_out_mplane    = gsc_m2m_g_fmt_mplane,
 563        .vidioc_try_fmt_vid_cap_mplane  = gsc_m2m_try_fmt_mplane,
 564        .vidioc_try_fmt_vid_out_mplane  = gsc_m2m_try_fmt_mplane,
 565        .vidioc_s_fmt_vid_cap_mplane    = gsc_m2m_s_fmt_mplane,
 566        .vidioc_s_fmt_vid_out_mplane    = gsc_m2m_s_fmt_mplane,
 567        .vidioc_reqbufs                 = gsc_m2m_reqbufs,
 568        .vidioc_expbuf                  = gsc_m2m_expbuf,
 569        .vidioc_querybuf                = gsc_m2m_querybuf,
 570        .vidioc_qbuf                    = gsc_m2m_qbuf,
 571        .vidioc_dqbuf                   = gsc_m2m_dqbuf,
 572        .vidioc_streamon                = gsc_m2m_streamon,
 573        .vidioc_streamoff               = gsc_m2m_streamoff,
 574        .vidioc_g_selection             = gsc_m2m_g_selection,
 575        .vidioc_s_selection             = gsc_m2m_s_selection
 576};
 577
 578static int queue_init(void *priv, struct vb2_queue *src_vq,
 579                        struct vb2_queue *dst_vq)
 580{
 581        struct gsc_ctx *ctx = priv;
 582        int ret;
 583
 584        memset(src_vq, 0, sizeof(*src_vq));
 585        src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
 586        src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
 587        src_vq->drv_priv = ctx;
 588        src_vq->ops = &gsc_m2m_qops;
 589        src_vq->mem_ops = &vb2_dma_contig_memops;
 590        src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
 591        src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
 592        src_vq->lock = &ctx->gsc_dev->lock;
 593        src_vq->dev = &ctx->gsc_dev->pdev->dev;
 594
 595        ret = vb2_queue_init(src_vq);
 596        if (ret)
 597                return ret;
 598
 599        memset(dst_vq, 0, sizeof(*dst_vq));
 600        dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
 601        dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
 602        dst_vq->drv_priv = ctx;
 603        dst_vq->ops = &gsc_m2m_qops;
 604        dst_vq->mem_ops = &vb2_dma_contig_memops;
 605        dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
 606        dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
 607        dst_vq->lock = &ctx->gsc_dev->lock;
 608        dst_vq->dev = &ctx->gsc_dev->pdev->dev;
 609
 610        return vb2_queue_init(dst_vq);
 611}
 612
 613static int gsc_m2m_open(struct file *file)
 614{
 615        struct gsc_dev *gsc = video_drvdata(file);
 616        struct gsc_ctx *ctx = NULL;
 617        int ret;
 618
 619        pr_debug("pid: %d, state: 0x%lx", task_pid_nr(current), gsc->state);
 620
 621        if (mutex_lock_interruptible(&gsc->lock))
 622                return -ERESTARTSYS;
 623
 624        ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 625        if (!ctx) {
 626                ret = -ENOMEM;
 627                goto unlock;
 628        }
 629
 630        v4l2_fh_init(&ctx->fh, gsc->m2m.vfd);
 631        ret = gsc_ctrls_create(ctx);
 632        if (ret)
 633                goto error_fh;
 634
 635        /* Use separate control handler per file handle */
 636        ctx->fh.ctrl_handler = &ctx->ctrl_handler;
 637        file->private_data = &ctx->fh;
 638        v4l2_fh_add(&ctx->fh);
 639
 640        ctx->gsc_dev = gsc;
 641        /* Default color format */
 642        ctx->s_frame.fmt = get_format(0);
 643        ctx->d_frame.fmt = get_format(0);
 644        /* Setup the device context for mem2mem mode. */
 645        ctx->state = GSC_CTX_M2M;
 646        ctx->flags = 0;
 647        ctx->in_path = GSC_DMA;
 648        ctx->out_path = GSC_DMA;
 649
 650        ctx->m2m_ctx = v4l2_m2m_ctx_init(gsc->m2m.m2m_dev, ctx, queue_init);
 651        if (IS_ERR(ctx->m2m_ctx)) {
 652                pr_err("Failed to initialize m2m context");
 653                ret = PTR_ERR(ctx->m2m_ctx);
 654                goto error_ctrls;
 655        }
 656
 657        if (gsc->m2m.refcnt++ == 0)
 658                set_bit(ST_M2M_OPEN, &gsc->state);
 659
 660        pr_debug("gsc m2m driver is opened, ctx(0x%p)", ctx);
 661
 662        mutex_unlock(&gsc->lock);
 663        return 0;
 664
 665error_ctrls:
 666        gsc_ctrls_delete(ctx);
 667        v4l2_fh_del(&ctx->fh);
 668error_fh:
 669        v4l2_fh_exit(&ctx->fh);
 670        kfree(ctx);
 671unlock:
 672        mutex_unlock(&gsc->lock);
 673        return ret;
 674}
 675
 676static int gsc_m2m_release(struct file *file)
 677{
 678        struct gsc_ctx *ctx = fh_to_ctx(file->private_data);
 679        struct gsc_dev *gsc = ctx->gsc_dev;
 680
 681        pr_debug("pid: %d, state: 0x%lx, refcnt= %d",
 682                task_pid_nr(current), gsc->state, gsc->m2m.refcnt);
 683
 684        mutex_lock(&gsc->lock);
 685
 686        v4l2_m2m_ctx_release(ctx->m2m_ctx);
 687        gsc_ctrls_delete(ctx);
 688        v4l2_fh_del(&ctx->fh);
 689        v4l2_fh_exit(&ctx->fh);
 690
 691        if (--gsc->m2m.refcnt <= 0)
 692                clear_bit(ST_M2M_OPEN, &gsc->state);
 693        kfree(ctx);
 694
 695        mutex_unlock(&gsc->lock);
 696        return 0;
 697}
 698
 699static __poll_t gsc_m2m_poll(struct file *file,
 700                                        struct poll_table_struct *wait)
 701{
 702        struct gsc_ctx *ctx = fh_to_ctx(file->private_data);
 703        struct gsc_dev *gsc = ctx->gsc_dev;
 704        __poll_t ret;
 705
 706        if (mutex_lock_interruptible(&gsc->lock))
 707                return EPOLLERR;
 708
 709        ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
 710        mutex_unlock(&gsc->lock);
 711
 712        return ret;
 713}
 714
 715static int gsc_m2m_mmap(struct file *file, struct vm_area_struct *vma)
 716{
 717        struct gsc_ctx *ctx = fh_to_ctx(file->private_data);
 718        struct gsc_dev *gsc = ctx->gsc_dev;
 719        int ret;
 720
 721        if (mutex_lock_interruptible(&gsc->lock))
 722                return -ERESTARTSYS;
 723
 724        ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
 725        mutex_unlock(&gsc->lock);
 726
 727        return ret;
 728}
 729
 730static const struct v4l2_file_operations gsc_m2m_fops = {
 731        .owner          = THIS_MODULE,
 732        .open           = gsc_m2m_open,
 733        .release        = gsc_m2m_release,
 734        .poll           = gsc_m2m_poll,
 735        .unlocked_ioctl = video_ioctl2,
 736        .mmap           = gsc_m2m_mmap,
 737};
 738
 739static const struct v4l2_m2m_ops gsc_m2m_ops = {
 740        .device_run     = gsc_m2m_device_run,
 741        .job_abort      = gsc_m2m_job_abort,
 742};
 743
 744int gsc_register_m2m_device(struct gsc_dev *gsc)
 745{
 746        struct platform_device *pdev;
 747        int ret;
 748
 749        if (!gsc)
 750                return -ENODEV;
 751
 752        pdev = gsc->pdev;
 753
 754        gsc->vdev.fops          = &gsc_m2m_fops;
 755        gsc->vdev.ioctl_ops     = &gsc_m2m_ioctl_ops;
 756        gsc->vdev.release       = video_device_release_empty;
 757        gsc->vdev.lock          = &gsc->lock;
 758        gsc->vdev.vfl_dir       = VFL_DIR_M2M;
 759        gsc->vdev.v4l2_dev      = &gsc->v4l2_dev;
 760        gsc->vdev.device_caps   = V4L2_CAP_STREAMING |
 761                                  V4L2_CAP_VIDEO_M2M_MPLANE;
 762        snprintf(gsc->vdev.name, sizeof(gsc->vdev.name), "%s.%d:m2m",
 763                                        GSC_MODULE_NAME, gsc->id);
 764
 765        video_set_drvdata(&gsc->vdev, gsc);
 766
 767        gsc->m2m.vfd = &gsc->vdev;
 768        gsc->m2m.m2m_dev = v4l2_m2m_init(&gsc_m2m_ops);
 769        if (IS_ERR(gsc->m2m.m2m_dev)) {
 770                dev_err(&pdev->dev, "failed to initialize v4l2-m2m device\n");
 771                return PTR_ERR(gsc->m2m.m2m_dev);
 772        }
 773
 774        ret = video_register_device(&gsc->vdev, VFL_TYPE_GRABBER, -1);
 775        if (ret) {
 776                dev_err(&pdev->dev,
 777                         "%s(): failed to register video device\n", __func__);
 778                goto err_m2m_release;
 779        }
 780
 781        pr_debug("gsc m2m driver registered as /dev/video%d", gsc->vdev.num);
 782        return 0;
 783
 784err_m2m_release:
 785        v4l2_m2m_release(gsc->m2m.m2m_dev);
 786
 787        return ret;
 788}
 789
 790void gsc_unregister_m2m_device(struct gsc_dev *gsc)
 791{
 792        if (gsc) {
 793                v4l2_m2m_release(gsc->m2m.m2m_dev);
 794                video_unregister_device(&gsc->vdev);
 795        }
 796}
 797