linux/drivers/media/platform/sti/bdisp/bdisp-v4l2.c
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   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (C) STMicroelectronics SA 2014
   4 * Authors: Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics.
   5 */
   6
   7#include <linux/errno.h>
   8#include <linux/interrupt.h>
   9#include <linux/kernel.h>
  10#include <linux/module.h>
  11#include <linux/of.h>
  12#include <linux/pm_runtime.h>
  13#include <linux/slab.h>
  14
  15#include <media/v4l2-event.h>
  16#include <media/v4l2-ioctl.h>
  17
  18#include "bdisp.h"
  19
  20#define BDISP_MAX_CTRL_NUM      10
  21
  22#define BDISP_WORK_TIMEOUT      ((100 * HZ) / 1000)
  23
  24/* User configuration change */
  25#define BDISP_PARAMS            BIT(0) /* Config updated */
  26#define BDISP_SRC_FMT           BIT(1) /* Source set */
  27#define BDISP_DST_FMT           BIT(2) /* Destination set */
  28#define BDISP_CTX_STOP_REQ      BIT(3) /* Stop request */
  29#define BDISP_CTX_ABORT         BIT(4) /* Abort while device run */
  30
  31#define BDISP_MIN_W             1
  32#define BDISP_MAX_W             8191
  33#define BDISP_MIN_H             1
  34#define BDISP_MAX_H             8191
  35
  36#define fh_to_ctx(__fh) container_of(__fh, struct bdisp_ctx, fh)
  37
  38enum bdisp_dev_flags {
  39        ST_M2M_OPEN,            /* Driver opened */
  40        ST_M2M_RUNNING,         /* HW device running */
  41        ST_M2M_SUSPENDED,       /* Driver suspended */
  42        ST_M2M_SUSPENDING,      /* Driver being suspended */
  43};
  44
  45static const struct bdisp_fmt bdisp_formats[] = {
  46        /* ARGB888. [31:0] A:R:G:B 8:8:8:8 little endian */
  47        {
  48                .pixelformat    = V4L2_PIX_FMT_ABGR32, /* is actually ARGB */
  49                .nb_planes      = 1,
  50                .bpp            = 32,
  51                .bpp_plane0     = 32,
  52                .w_align        = 1,
  53                .h_align        = 1
  54        },
  55        /* XRGB888. [31:0] x:R:G:B 8:8:8:8 little endian */
  56        {
  57                .pixelformat    = V4L2_PIX_FMT_XBGR32, /* is actually xRGB */
  58                .nb_planes      = 1,
  59                .bpp            = 32,
  60                .bpp_plane0     = 32,
  61                .w_align        = 1,
  62                .h_align        = 1
  63        },
  64        /* RGB565. [15:0] R:G:B 5:6:5 little endian */
  65        {
  66                .pixelformat    = V4L2_PIX_FMT_RGB565,
  67                .nb_planes      = 1,
  68                .bpp            = 16,
  69                .bpp_plane0     = 16,
  70                .w_align        = 1,
  71                .h_align        = 1
  72        },
  73        /* NV12. YUV420SP - 1 plane for Y + 1 plane for (CbCr) */
  74        {
  75                .pixelformat    = V4L2_PIX_FMT_NV12,
  76                .nb_planes      = 2,
  77                .bpp            = 12,
  78                .bpp_plane0     = 8,
  79                .w_align        = 2,
  80                .h_align        = 2
  81        },
  82        /* RGB888. [23:0] B:G:R 8:8:8 little endian */
  83        {
  84                .pixelformat    = V4L2_PIX_FMT_RGB24,
  85                .nb_planes      = 1,
  86                .bpp            = 24,
  87                .bpp_plane0     = 24,
  88                .w_align        = 1,
  89                .h_align        = 1
  90        },
  91        /* YU12. YUV420P - 1 plane for Y + 1 plane for Cb + 1 plane for Cr
  92         * To keep as the LAST element of this table (no support on capture)
  93         */
  94        {
  95                .pixelformat    = V4L2_PIX_FMT_YUV420,
  96                .nb_planes      = 3,
  97                .bpp            = 12,
  98                .bpp_plane0     = 8,
  99                .w_align        = 2,
 100                .h_align        = 2
 101        }
 102};
 103
 104/* Default format : HD ARGB32*/
 105#define BDISP_DEF_WIDTH         1920
 106#define BDISP_DEF_HEIGHT        1080
 107
 108static const struct bdisp_frame bdisp_dflt_fmt = {
 109                .width          = BDISP_DEF_WIDTH,
 110                .height         = BDISP_DEF_HEIGHT,
 111                .fmt            = &bdisp_formats[0],
 112                .field          = V4L2_FIELD_NONE,
 113                .bytesperline   = BDISP_DEF_WIDTH * 4,
 114                .sizeimage      = BDISP_DEF_WIDTH * BDISP_DEF_HEIGHT * 4,
 115                .colorspace     = V4L2_COLORSPACE_REC709,
 116                .crop           = {0, 0, BDISP_DEF_WIDTH, BDISP_DEF_HEIGHT},
 117                .paddr          = {0, 0, 0, 0}
 118};
 119
 120static inline void bdisp_ctx_state_lock_set(u32 state, struct bdisp_ctx *ctx)
 121{
 122        unsigned long flags;
 123
 124        spin_lock_irqsave(&ctx->bdisp_dev->slock, flags);
 125        ctx->state |= state;
 126        spin_unlock_irqrestore(&ctx->bdisp_dev->slock, flags);
 127}
 128
 129static inline void bdisp_ctx_state_lock_clear(u32 state, struct bdisp_ctx *ctx)
 130{
 131        unsigned long flags;
 132
 133        spin_lock_irqsave(&ctx->bdisp_dev->slock, flags);
 134        ctx->state &= ~state;
 135        spin_unlock_irqrestore(&ctx->bdisp_dev->slock, flags);
 136}
 137
 138static inline bool bdisp_ctx_state_is_set(u32 mask, struct bdisp_ctx *ctx)
 139{
 140        unsigned long flags;
 141        bool ret;
 142
 143        spin_lock_irqsave(&ctx->bdisp_dev->slock, flags);
 144        ret = (ctx->state & mask) == mask;
 145        spin_unlock_irqrestore(&ctx->bdisp_dev->slock, flags);
 146
 147        return ret;
 148}
 149
 150static const struct bdisp_fmt *bdisp_find_fmt(u32 pixelformat)
 151{
 152        const struct bdisp_fmt *fmt;
 153        unsigned int i;
 154
 155        for (i = 0; i < ARRAY_SIZE(bdisp_formats); i++) {
 156                fmt = &bdisp_formats[i];
 157                if (fmt->pixelformat == pixelformat)
 158                        return fmt;
 159        }
 160
 161        return NULL;
 162}
 163
 164static struct bdisp_frame *ctx_get_frame(struct bdisp_ctx *ctx,
 165                                         enum v4l2_buf_type type)
 166{
 167        switch (type) {
 168        case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 169                return &ctx->src;
 170        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 171                return &ctx->dst;
 172        default:
 173                dev_err(ctx->bdisp_dev->dev,
 174                        "Wrong buffer/video queue type (%d)\n", type);
 175                break;
 176        }
 177
 178        return ERR_PTR(-EINVAL);
 179}
 180
 181static void bdisp_job_finish(struct bdisp_ctx *ctx, int vb_state)
 182{
 183        struct vb2_v4l2_buffer *src_vb, *dst_vb;
 184
 185        if (WARN(!ctx || !ctx->fh.m2m_ctx, "Null hardware context\n"))
 186                return;
 187
 188        dev_dbg(ctx->bdisp_dev->dev, "%s\n", __func__);
 189
 190        src_vb = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
 191        dst_vb = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
 192
 193        if (src_vb && dst_vb) {
 194                dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
 195                dst_vb->timecode = src_vb->timecode;
 196                dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
 197                dst_vb->flags |= src_vb->flags &
 198                                          V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
 199
 200                v4l2_m2m_buf_done(src_vb, vb_state);
 201                v4l2_m2m_buf_done(dst_vb, vb_state);
 202
 203                v4l2_m2m_job_finish(ctx->bdisp_dev->m2m.m2m_dev,
 204                                    ctx->fh.m2m_ctx);
 205        }
 206}
 207
 208static int bdisp_ctx_stop_req(struct bdisp_ctx *ctx)
 209{
 210        struct bdisp_ctx *curr_ctx;
 211        struct bdisp_dev *bdisp = ctx->bdisp_dev;
 212        int ret;
 213
 214        dev_dbg(ctx->bdisp_dev->dev, "%s\n", __func__);
 215
 216        cancel_delayed_work(&bdisp->timeout_work);
 217
 218        curr_ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
 219        if (!test_bit(ST_M2M_RUNNING, &bdisp->state) || (curr_ctx != ctx))
 220                return 0;
 221
 222        bdisp_ctx_state_lock_set(BDISP_CTX_STOP_REQ, ctx);
 223
 224        ret = wait_event_timeout(bdisp->irq_queue,
 225                        !bdisp_ctx_state_is_set(BDISP_CTX_STOP_REQ, ctx),
 226                        BDISP_WORK_TIMEOUT);
 227
 228        if (!ret) {
 229                dev_err(ctx->bdisp_dev->dev, "%s IRQ timeout\n", __func__);
 230                return -ETIMEDOUT;
 231        }
 232
 233        return 0;
 234}
 235
 236static void __bdisp_job_abort(struct bdisp_ctx *ctx)
 237{
 238        int ret;
 239
 240        ret = bdisp_ctx_stop_req(ctx);
 241        if ((ret == -ETIMEDOUT) || (ctx->state & BDISP_CTX_ABORT)) {
 242                bdisp_ctx_state_lock_clear(BDISP_CTX_STOP_REQ | BDISP_CTX_ABORT,
 243                                           ctx);
 244                bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
 245        }
 246}
 247
 248static void bdisp_job_abort(void *priv)
 249{
 250        __bdisp_job_abort((struct bdisp_ctx *)priv);
 251}
 252
 253static int bdisp_get_addr(struct bdisp_ctx *ctx, struct vb2_buffer *vb,
 254                          struct bdisp_frame *frame, dma_addr_t *paddr)
 255{
 256        if (!vb || !frame)
 257                return -EINVAL;
 258
 259        paddr[0] = vb2_dma_contig_plane_dma_addr(vb, 0);
 260
 261        if (frame->fmt->nb_planes > 1)
 262                /* UV (NV12) or U (420P) */
 263                paddr[1] = (dma_addr_t)(paddr[0] +
 264                                frame->bytesperline * frame->height);
 265
 266        if (frame->fmt->nb_planes > 2)
 267                /* V (420P) */
 268                paddr[2] = (dma_addr_t)(paddr[1] +
 269                                (frame->bytesperline * frame->height) / 4);
 270
 271        if (frame->fmt->nb_planes > 3)
 272                dev_dbg(ctx->bdisp_dev->dev, "ignoring some planes\n");
 273
 274        dev_dbg(ctx->bdisp_dev->dev,
 275                "%s plane[0]=%pad plane[1]=%pad plane[2]=%pad\n",
 276                __func__, &paddr[0], &paddr[1], &paddr[2]);
 277
 278        return 0;
 279}
 280
 281static int bdisp_get_bufs(struct bdisp_ctx *ctx)
 282{
 283        struct bdisp_frame *src, *dst;
 284        struct vb2_v4l2_buffer *src_vb, *dst_vb;
 285        int ret;
 286
 287        src = &ctx->src;
 288        dst = &ctx->dst;
 289
 290        src_vb = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
 291        ret = bdisp_get_addr(ctx, &src_vb->vb2_buf, src, src->paddr);
 292        if (ret)
 293                return ret;
 294
 295        dst_vb = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
 296        ret = bdisp_get_addr(ctx, &dst_vb->vb2_buf, dst, dst->paddr);
 297        if (ret)
 298                return ret;
 299
 300        dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
 301
 302        return 0;
 303}
 304
 305static void bdisp_device_run(void *priv)
 306{
 307        struct bdisp_ctx *ctx = priv;
 308        struct bdisp_dev *bdisp;
 309        unsigned long flags;
 310        int err = 0;
 311
 312        if (WARN(!ctx, "Null hardware context\n"))
 313                return;
 314
 315        bdisp = ctx->bdisp_dev;
 316        dev_dbg(bdisp->dev, "%s\n", __func__);
 317        spin_lock_irqsave(&bdisp->slock, flags);
 318
 319        if (bdisp->m2m.ctx != ctx) {
 320                dev_dbg(bdisp->dev, "ctx updated: %p -> %p\n",
 321                        bdisp->m2m.ctx, ctx);
 322                ctx->state |= BDISP_PARAMS;
 323                bdisp->m2m.ctx = ctx;
 324        }
 325
 326        if (ctx->state & BDISP_CTX_STOP_REQ) {
 327                ctx->state &= ~BDISP_CTX_STOP_REQ;
 328                ctx->state |= BDISP_CTX_ABORT;
 329                wake_up(&bdisp->irq_queue);
 330                goto out;
 331        }
 332
 333        err = bdisp_get_bufs(ctx);
 334        if (err) {
 335                dev_err(bdisp->dev, "cannot get address\n");
 336                goto out;
 337        }
 338
 339        bdisp_dbg_perf_begin(bdisp);
 340
 341        err = bdisp_hw_reset(bdisp);
 342        if (err) {
 343                dev_err(bdisp->dev, "could not get HW ready\n");
 344                goto out;
 345        }
 346
 347        err = bdisp_hw_update(ctx);
 348        if (err) {
 349                dev_err(bdisp->dev, "could not send HW request\n");
 350                goto out;
 351        }
 352
 353        queue_delayed_work(bdisp->work_queue, &bdisp->timeout_work,
 354                           BDISP_WORK_TIMEOUT);
 355        set_bit(ST_M2M_RUNNING, &bdisp->state);
 356out:
 357        ctx->state &= ~BDISP_PARAMS;
 358        spin_unlock_irqrestore(&bdisp->slock, flags);
 359        if (err)
 360                bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
 361}
 362
 363static const struct v4l2_m2m_ops bdisp_m2m_ops = {
 364        .device_run     = bdisp_device_run,
 365        .job_abort      = bdisp_job_abort,
 366};
 367
 368static int __bdisp_s_ctrl(struct bdisp_ctx *ctx, struct v4l2_ctrl *ctrl)
 369{
 370        if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
 371                return 0;
 372
 373        switch (ctrl->id) {
 374        case V4L2_CID_HFLIP:
 375                ctx->hflip = ctrl->val;
 376                break;
 377        case V4L2_CID_VFLIP:
 378                ctx->vflip = ctrl->val;
 379                break;
 380        default:
 381                dev_err(ctx->bdisp_dev->dev, "unknown control %d\n", ctrl->id);
 382                return -EINVAL;
 383        }
 384
 385        ctx->state |= BDISP_PARAMS;
 386
 387        return 0;
 388}
 389
 390static int bdisp_s_ctrl(struct v4l2_ctrl *ctrl)
 391{
 392        struct bdisp_ctx *ctx = container_of(ctrl->handler, struct bdisp_ctx,
 393                                                ctrl_handler);
 394        unsigned long flags;
 395        int ret;
 396
 397        spin_lock_irqsave(&ctx->bdisp_dev->slock, flags);
 398        ret = __bdisp_s_ctrl(ctx, ctrl);
 399        spin_unlock_irqrestore(&ctx->bdisp_dev->slock, flags);
 400
 401        return ret;
 402}
 403
 404static const struct v4l2_ctrl_ops bdisp_c_ops = {
 405        .s_ctrl = bdisp_s_ctrl,
 406};
 407
 408static int bdisp_ctrls_create(struct bdisp_ctx *ctx)
 409{
 410        if (ctx->ctrls_rdy)
 411                return 0;
 412
 413        v4l2_ctrl_handler_init(&ctx->ctrl_handler, BDISP_MAX_CTRL_NUM);
 414
 415        ctx->bdisp_ctrls.hflip = v4l2_ctrl_new_std(&ctx->ctrl_handler,
 416                                &bdisp_c_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
 417        ctx->bdisp_ctrls.vflip = v4l2_ctrl_new_std(&ctx->ctrl_handler,
 418                                &bdisp_c_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
 419
 420        if (ctx->ctrl_handler.error) {
 421                int err = ctx->ctrl_handler.error;
 422
 423                v4l2_ctrl_handler_free(&ctx->ctrl_handler);
 424                return err;
 425        }
 426
 427        ctx->ctrls_rdy = true;
 428
 429        return 0;
 430}
 431
 432static void bdisp_ctrls_delete(struct bdisp_ctx *ctx)
 433{
 434        if (ctx->ctrls_rdy) {
 435                v4l2_ctrl_handler_free(&ctx->ctrl_handler);
 436                ctx->ctrls_rdy = false;
 437        }
 438}
 439
 440static int bdisp_queue_setup(struct vb2_queue *vq,
 441                             unsigned int *nb_buf, unsigned int *nb_planes,
 442                             unsigned int sizes[], struct device *alloc_devs[])
 443{
 444        struct bdisp_ctx *ctx = vb2_get_drv_priv(vq);
 445        struct bdisp_frame *frame = ctx_get_frame(ctx, vq->type);
 446
 447        if (IS_ERR(frame)) {
 448                dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
 449                return PTR_ERR(frame);
 450        }
 451
 452        if (!frame->fmt) {
 453                dev_err(ctx->bdisp_dev->dev, "Invalid format\n");
 454                return -EINVAL;
 455        }
 456
 457        if (*nb_planes)
 458                return sizes[0] < frame->sizeimage ? -EINVAL : 0;
 459
 460        *nb_planes = 1;
 461        sizes[0] = frame->sizeimage;
 462
 463        return 0;
 464}
 465
 466static int bdisp_buf_prepare(struct vb2_buffer *vb)
 467{
 468        struct bdisp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
 469        struct bdisp_frame *frame = ctx_get_frame(ctx, vb->vb2_queue->type);
 470
 471        if (IS_ERR(frame)) {
 472                dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
 473                return PTR_ERR(frame);
 474        }
 475
 476        if (vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 477                vb2_set_plane_payload(vb, 0, frame->sizeimage);
 478
 479        return 0;
 480}
 481
 482static void bdisp_buf_queue(struct vb2_buffer *vb)
 483{
 484        struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 485        struct bdisp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
 486
 487        /* return to V4L2 any 0-size buffer so it can be dequeued by user */
 488        if (!vb2_get_plane_payload(vb, 0)) {
 489                dev_dbg(ctx->bdisp_dev->dev, "0 data buffer, skip it\n");
 490                vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
 491                return;
 492        }
 493
 494        if (ctx->fh.m2m_ctx)
 495                v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
 496}
 497
 498static int bdisp_start_streaming(struct vb2_queue *q, unsigned int count)
 499{
 500        struct bdisp_ctx *ctx = q->drv_priv;
 501        struct vb2_v4l2_buffer *buf;
 502        int ret = pm_runtime_get_sync(ctx->bdisp_dev->dev);
 503
 504        if (ret < 0) {
 505                dev_err(ctx->bdisp_dev->dev, "failed to set runtime PM\n");
 506
 507                if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
 508                        while ((buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
 509                                v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
 510                } else {
 511                        while ((buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx)))
 512                                v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
 513                }
 514
 515                return ret;
 516        }
 517
 518        return 0;
 519}
 520
 521static void bdisp_stop_streaming(struct vb2_queue *q)
 522{
 523        struct bdisp_ctx *ctx = q->drv_priv;
 524
 525        __bdisp_job_abort(ctx);
 526
 527        pm_runtime_put(ctx->bdisp_dev->dev);
 528}
 529
 530static const struct vb2_ops bdisp_qops = {
 531        .queue_setup     = bdisp_queue_setup,
 532        .buf_prepare     = bdisp_buf_prepare,
 533        .buf_queue       = bdisp_buf_queue,
 534        .wait_prepare    = vb2_ops_wait_prepare,
 535        .wait_finish     = vb2_ops_wait_finish,
 536        .stop_streaming  = bdisp_stop_streaming,
 537        .start_streaming = bdisp_start_streaming,
 538};
 539
 540static int queue_init(void *priv,
 541                      struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
 542{
 543        struct bdisp_ctx *ctx = priv;
 544        int ret;
 545
 546        memset(src_vq, 0, sizeof(*src_vq));
 547        src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 548        src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
 549        src_vq->drv_priv = ctx;
 550        src_vq->ops = &bdisp_qops;
 551        src_vq->mem_ops = &vb2_dma_contig_memops;
 552        src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
 553        src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
 554        src_vq->lock = &ctx->bdisp_dev->lock;
 555        src_vq->dev = ctx->bdisp_dev->v4l2_dev.dev;
 556
 557        ret = vb2_queue_init(src_vq);
 558        if (ret)
 559                return ret;
 560
 561        memset(dst_vq, 0, sizeof(*dst_vq));
 562        dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 563        dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
 564        dst_vq->drv_priv = ctx;
 565        dst_vq->ops = &bdisp_qops;
 566        dst_vq->mem_ops = &vb2_dma_contig_memops;
 567        dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
 568        dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
 569        dst_vq->lock = &ctx->bdisp_dev->lock;
 570        dst_vq->dev = ctx->bdisp_dev->v4l2_dev.dev;
 571
 572        return vb2_queue_init(dst_vq);
 573}
 574
 575static int bdisp_open(struct file *file)
 576{
 577        struct bdisp_dev *bdisp = video_drvdata(file);
 578        struct bdisp_ctx *ctx = NULL;
 579        int ret;
 580
 581        if (mutex_lock_interruptible(&bdisp->lock))
 582                return -ERESTARTSYS;
 583
 584        /* Allocate memory for both context and node */
 585        ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 586        if (!ctx) {
 587                ret = -ENOMEM;
 588                goto unlock;
 589        }
 590        ctx->bdisp_dev = bdisp;
 591
 592        if (bdisp_hw_alloc_nodes(ctx)) {
 593                dev_err(bdisp->dev, "no memory for nodes\n");
 594                ret = -ENOMEM;
 595                goto mem_ctx;
 596        }
 597
 598        v4l2_fh_init(&ctx->fh, bdisp->m2m.vdev);
 599
 600        ret = bdisp_ctrls_create(ctx);
 601        if (ret) {
 602                dev_err(bdisp->dev, "Failed to create control\n");
 603                goto error_fh;
 604        }
 605
 606        /* Use separate control handler per file handle */
 607        ctx->fh.ctrl_handler = &ctx->ctrl_handler;
 608        file->private_data = &ctx->fh;
 609        v4l2_fh_add(&ctx->fh);
 610
 611        /* Default format */
 612        ctx->src = bdisp_dflt_fmt;
 613        ctx->dst = bdisp_dflt_fmt;
 614
 615        /* Setup the device context for mem2mem mode. */
 616        ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(bdisp->m2m.m2m_dev, ctx,
 617                                            queue_init);
 618        if (IS_ERR(ctx->fh.m2m_ctx)) {
 619                dev_err(bdisp->dev, "Failed to initialize m2m context\n");
 620                ret = PTR_ERR(ctx->fh.m2m_ctx);
 621                goto error_ctrls;
 622        }
 623
 624        bdisp->m2m.refcnt++;
 625        set_bit(ST_M2M_OPEN, &bdisp->state);
 626
 627        dev_dbg(bdisp->dev, "driver opened, ctx = 0x%p\n", ctx);
 628
 629        mutex_unlock(&bdisp->lock);
 630
 631        return 0;
 632
 633error_ctrls:
 634        bdisp_ctrls_delete(ctx);
 635        v4l2_fh_del(&ctx->fh);
 636error_fh:
 637        v4l2_fh_exit(&ctx->fh);
 638        bdisp_hw_free_nodes(ctx);
 639mem_ctx:
 640        kfree(ctx);
 641unlock:
 642        mutex_unlock(&bdisp->lock);
 643
 644        return ret;
 645}
 646
 647static int bdisp_release(struct file *file)
 648{
 649        struct bdisp_ctx *ctx = fh_to_ctx(file->private_data);
 650        struct bdisp_dev *bdisp = ctx->bdisp_dev;
 651
 652        dev_dbg(bdisp->dev, "%s\n", __func__);
 653
 654        mutex_lock(&bdisp->lock);
 655
 656        v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
 657
 658        bdisp_ctrls_delete(ctx);
 659
 660        v4l2_fh_del(&ctx->fh);
 661        v4l2_fh_exit(&ctx->fh);
 662
 663        if (--bdisp->m2m.refcnt <= 0)
 664                clear_bit(ST_M2M_OPEN, &bdisp->state);
 665
 666        bdisp_hw_free_nodes(ctx);
 667
 668        kfree(ctx);
 669
 670        mutex_unlock(&bdisp->lock);
 671
 672        return 0;
 673}
 674
 675static const struct v4l2_file_operations bdisp_fops = {
 676        .owner          = THIS_MODULE,
 677        .open           = bdisp_open,
 678        .release        = bdisp_release,
 679        .poll           = v4l2_m2m_fop_poll,
 680        .unlocked_ioctl = video_ioctl2,
 681        .mmap           = v4l2_m2m_fop_mmap,
 682};
 683
 684static int bdisp_querycap(struct file *file, void *fh,
 685                          struct v4l2_capability *cap)
 686{
 687        struct bdisp_ctx *ctx = fh_to_ctx(fh);
 688        struct bdisp_dev *bdisp = ctx->bdisp_dev;
 689
 690        strscpy(cap->driver, bdisp->pdev->name, sizeof(cap->driver));
 691        strscpy(cap->card, bdisp->pdev->name, sizeof(cap->card));
 692        snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s%d",
 693                 BDISP_NAME, bdisp->id);
 694        return 0;
 695}
 696
 697static int bdisp_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f)
 698{
 699        struct bdisp_ctx *ctx = fh_to_ctx(fh);
 700        const struct bdisp_fmt *fmt;
 701
 702        if (f->index >= ARRAY_SIZE(bdisp_formats))
 703                return -EINVAL;
 704
 705        fmt = &bdisp_formats[f->index];
 706
 707        if ((fmt->pixelformat == V4L2_PIX_FMT_YUV420) &&
 708            (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
 709                dev_dbg(ctx->bdisp_dev->dev, "No YU12 on capture\n");
 710                return -EINVAL;
 711        }
 712        f->pixelformat = fmt->pixelformat;
 713
 714        return 0;
 715}
 716
 717static int bdisp_g_fmt(struct file *file, void *fh, struct v4l2_format *f)
 718{
 719        struct bdisp_ctx *ctx = fh_to_ctx(fh);
 720        struct v4l2_pix_format *pix;
 721        struct bdisp_frame *frame  = ctx_get_frame(ctx, f->type);
 722
 723        if (IS_ERR(frame)) {
 724                dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
 725                return PTR_ERR(frame);
 726        }
 727
 728        pix = &f->fmt.pix;
 729        pix->width = frame->width;
 730        pix->height = frame->height;
 731        pix->pixelformat = frame->fmt->pixelformat;
 732        pix->field = frame->field;
 733        pix->bytesperline = frame->bytesperline;
 734        pix->sizeimage = frame->sizeimage;
 735        pix->colorspace = (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ?
 736                                frame->colorspace : bdisp_dflt_fmt.colorspace;
 737
 738        return 0;
 739}
 740
 741static int bdisp_try_fmt(struct file *file, void *fh, struct v4l2_format *f)
 742{
 743        struct bdisp_ctx *ctx = fh_to_ctx(fh);
 744        struct v4l2_pix_format *pix = &f->fmt.pix;
 745        const struct bdisp_fmt *format;
 746        u32 in_w, in_h;
 747
 748        format = bdisp_find_fmt(pix->pixelformat);
 749        if (!format) {
 750                dev_dbg(ctx->bdisp_dev->dev, "Unknown format 0x%x\n",
 751                        pix->pixelformat);
 752                return -EINVAL;
 753        }
 754
 755        /* YUV420P only supported for VIDEO_OUTPUT */
 756        if ((format->pixelformat == V4L2_PIX_FMT_YUV420) &&
 757            (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)) {
 758                dev_dbg(ctx->bdisp_dev->dev, "No YU12 on capture\n");
 759                return -EINVAL;
 760        }
 761
 762        /* Field (interlaced only supported on OUTPUT) */
 763        if ((f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ||
 764            (pix->field != V4L2_FIELD_INTERLACED))
 765                pix->field = V4L2_FIELD_NONE;
 766
 767        /* Adjust width & height */
 768        in_w = pix->width;
 769        in_h = pix->height;
 770        v4l_bound_align_image(&pix->width,
 771                              BDISP_MIN_W, BDISP_MAX_W,
 772                              ffs(format->w_align) - 1,
 773                              &pix->height,
 774                              BDISP_MIN_H, BDISP_MAX_H,
 775                              ffs(format->h_align) - 1,
 776                              0);
 777        if ((pix->width != in_w) || (pix->height != in_h))
 778                dev_dbg(ctx->bdisp_dev->dev,
 779                        "%s size updated: %dx%d -> %dx%d\n", __func__,
 780                        in_w, in_h, pix->width, pix->height);
 781
 782        pix->bytesperline = (pix->width * format->bpp_plane0) / 8;
 783        pix->sizeimage = (pix->width * pix->height * format->bpp) / 8;
 784
 785        if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 786                pix->colorspace = bdisp_dflt_fmt.colorspace;
 787
 788        return 0;
 789}
 790
 791static int bdisp_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
 792{
 793        struct bdisp_ctx *ctx = fh_to_ctx(fh);
 794        struct vb2_queue *vq;
 795        struct bdisp_frame *frame;
 796        struct v4l2_pix_format *pix;
 797        int ret;
 798        u32 state;
 799
 800        ret = bdisp_try_fmt(file, fh, f);
 801        if (ret) {
 802                dev_err(ctx->bdisp_dev->dev, "Cannot set format\n");
 803                return ret;
 804        }
 805
 806        vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
 807        if (vb2_is_streaming(vq)) {
 808                dev_err(ctx->bdisp_dev->dev, "queue (%d) busy\n", f->type);
 809                return -EBUSY;
 810        }
 811
 812        frame = (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ?
 813                        &ctx->src : &ctx->dst;
 814        pix = &f->fmt.pix;
 815        frame->fmt = bdisp_find_fmt(pix->pixelformat);
 816        if (!frame->fmt) {
 817                dev_err(ctx->bdisp_dev->dev, "Unknown format 0x%x\n",
 818                        pix->pixelformat);
 819                return -EINVAL;
 820        }
 821
 822        frame->width = pix->width;
 823        frame->height = pix->height;
 824        frame->bytesperline = pix->bytesperline;
 825        frame->sizeimage = pix->sizeimage;
 826        frame->field = pix->field;
 827        if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
 828                frame->colorspace = pix->colorspace;
 829
 830        frame->crop.width = frame->width;
 831        frame->crop.height = frame->height;
 832        frame->crop.left = 0;
 833        frame->crop.top = 0;
 834
 835        state = BDISP_PARAMS;
 836        state |= (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
 837                        BDISP_DST_FMT : BDISP_SRC_FMT;
 838        bdisp_ctx_state_lock_set(state, ctx);
 839
 840        return 0;
 841}
 842
 843static int bdisp_g_selection(struct file *file, void *fh,
 844                             struct v4l2_selection *s)
 845{
 846        struct bdisp_frame *frame;
 847        struct bdisp_ctx *ctx = fh_to_ctx(fh);
 848
 849        frame = ctx_get_frame(ctx, s->type);
 850        if (IS_ERR(frame)) {
 851                dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
 852                return PTR_ERR(frame);
 853        }
 854
 855        switch (s->type) {
 856        case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 857                switch (s->target) {
 858                case V4L2_SEL_TGT_CROP:
 859                        /* cropped frame */
 860                        s->r = frame->crop;
 861                        break;
 862                case V4L2_SEL_TGT_CROP_DEFAULT:
 863                case V4L2_SEL_TGT_CROP_BOUNDS:
 864                        /* complete frame */
 865                        s->r.left = 0;
 866                        s->r.top = 0;
 867                        s->r.width = frame->width;
 868                        s->r.height = frame->height;
 869                        break;
 870                default:
 871                        dev_err(ctx->bdisp_dev->dev, "Invalid target\n");
 872                        return -EINVAL;
 873                }
 874                break;
 875
 876        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 877                switch (s->target) {
 878                case V4L2_SEL_TGT_COMPOSE:
 879                case V4L2_SEL_TGT_COMPOSE_PADDED:
 880                        /* composed (cropped) frame */
 881                        s->r = frame->crop;
 882                        break;
 883                case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 884                case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 885                        /* complete frame */
 886                        s->r.left = 0;
 887                        s->r.top = 0;
 888                        s->r.width = frame->width;
 889                        s->r.height = frame->height;
 890                        break;
 891                default:
 892                        dev_err(ctx->bdisp_dev->dev, "Invalid target\n");
 893                        return -EINVAL;
 894                }
 895                break;
 896
 897        default:
 898                dev_err(ctx->bdisp_dev->dev, "Invalid type\n");
 899                return -EINVAL;
 900        }
 901
 902        return 0;
 903}
 904
 905static int is_rect_enclosed(struct v4l2_rect *a, struct v4l2_rect *b)
 906{
 907        /* Return 1 if a is enclosed in b, or 0 otherwise. */
 908
 909        if (a->left < b->left || a->top < b->top)
 910                return 0;
 911
 912        if (a->left + a->width > b->left + b->width)
 913                return 0;
 914
 915        if (a->top + a->height > b->top + b->height)
 916                return 0;
 917
 918        return 1;
 919}
 920
 921static int bdisp_s_selection(struct file *file, void *fh,
 922                             struct v4l2_selection *s)
 923{
 924        struct bdisp_frame *frame;
 925        struct bdisp_ctx *ctx = fh_to_ctx(fh);
 926        struct v4l2_rect *in, out;
 927        bool valid = false;
 928
 929        if ((s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) &&
 930            (s->target == V4L2_SEL_TGT_CROP))
 931                valid = true;
 932
 933        if ((s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
 934            (s->target == V4L2_SEL_TGT_COMPOSE))
 935                valid = true;
 936
 937        if (!valid) {
 938                dev_err(ctx->bdisp_dev->dev, "Invalid type / target\n");
 939                return -EINVAL;
 940        }
 941
 942        frame = ctx_get_frame(ctx, s->type);
 943        if (IS_ERR(frame)) {
 944                dev_err(ctx->bdisp_dev->dev, "Invalid frame (%p)\n", frame);
 945                return PTR_ERR(frame);
 946        }
 947
 948        in = &s->r;
 949        out = *in;
 950
 951        /* Align and check origin */
 952        out.left = ALIGN(in->left, frame->fmt->w_align);
 953        out.top = ALIGN(in->top, frame->fmt->h_align);
 954
 955        if ((out.left < 0) || (out.left >= frame->width) ||
 956            (out.top < 0) || (out.top >= frame->height)) {
 957                dev_err(ctx->bdisp_dev->dev,
 958                        "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",
 959                        out.width, out.height, out.left, out.top,
 960                        frame->width, frame->height);
 961                return -EINVAL;
 962        }
 963
 964        /* Align and check size */
 965        out.width = ALIGN(in->width, frame->fmt->w_align);
 966        out.height = ALIGN(in->height, frame->fmt->w_align);
 967
 968        if (((out.left + out.width) > frame->width) ||
 969            ((out.top + out.height) > frame->height)) {
 970                dev_err(ctx->bdisp_dev->dev,
 971                        "Invalid crop: %dx%d@(%d,%d) vs frame: %dx%d\n",
 972                        out.width, out.height, out.left, out.top,
 973                        frame->width, frame->height);
 974                return -EINVAL;
 975        }
 976
 977        /* Checks adjust constraints flags */
 978        if (s->flags & V4L2_SEL_FLAG_LE && !is_rect_enclosed(&out, in))
 979                return -ERANGE;
 980
 981        if (s->flags & V4L2_SEL_FLAG_GE && !is_rect_enclosed(in, &out))
 982                return -ERANGE;
 983
 984        if ((out.left != in->left) || (out.top != in->top) ||
 985            (out.width != in->width) || (out.height != in->height)) {
 986                dev_dbg(ctx->bdisp_dev->dev,
 987                        "%s crop updated: %dx%d@(%d,%d) -> %dx%d@(%d,%d)\n",
 988                        __func__, in->width, in->height, in->left, in->top,
 989                        out.width, out.height, out.left, out.top);
 990                *in = out;
 991        }
 992
 993        frame->crop = out;
 994
 995        bdisp_ctx_state_lock_set(BDISP_PARAMS, ctx);
 996
 997        return 0;
 998}
 999
1000static int bdisp_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
1001{
1002        struct bdisp_ctx *ctx = fh_to_ctx(fh);
1003
1004        if ((type == V4L2_BUF_TYPE_VIDEO_OUTPUT) &&
1005            !bdisp_ctx_state_is_set(BDISP_SRC_FMT, ctx)) {
1006                dev_err(ctx->bdisp_dev->dev, "src not defined\n");
1007                return -EINVAL;
1008        }
1009
1010        if ((type == V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
1011            !bdisp_ctx_state_is_set(BDISP_DST_FMT, ctx)) {
1012                dev_err(ctx->bdisp_dev->dev, "dst not defined\n");
1013                return -EINVAL;
1014        }
1015
1016        return v4l2_m2m_streamon(file, ctx->fh.m2m_ctx, type);
1017}
1018
1019static const struct v4l2_ioctl_ops bdisp_ioctl_ops = {
1020        .vidioc_querycap                = bdisp_querycap,
1021        .vidioc_enum_fmt_vid_cap        = bdisp_enum_fmt,
1022        .vidioc_enum_fmt_vid_out        = bdisp_enum_fmt,
1023        .vidioc_g_fmt_vid_cap           = bdisp_g_fmt,
1024        .vidioc_g_fmt_vid_out           = bdisp_g_fmt,
1025        .vidioc_try_fmt_vid_cap         = bdisp_try_fmt,
1026        .vidioc_try_fmt_vid_out         = bdisp_try_fmt,
1027        .vidioc_s_fmt_vid_cap           = bdisp_s_fmt,
1028        .vidioc_s_fmt_vid_out           = bdisp_s_fmt,
1029        .vidioc_g_selection             = bdisp_g_selection,
1030        .vidioc_s_selection             = bdisp_s_selection,
1031        .vidioc_reqbufs                 = v4l2_m2m_ioctl_reqbufs,
1032        .vidioc_create_bufs             = v4l2_m2m_ioctl_create_bufs,
1033        .vidioc_expbuf                  = v4l2_m2m_ioctl_expbuf,
1034        .vidioc_querybuf                = v4l2_m2m_ioctl_querybuf,
1035        .vidioc_qbuf                    = v4l2_m2m_ioctl_qbuf,
1036        .vidioc_dqbuf                   = v4l2_m2m_ioctl_dqbuf,
1037        .vidioc_streamon                = bdisp_streamon,
1038        .vidioc_streamoff               = v4l2_m2m_ioctl_streamoff,
1039        .vidioc_subscribe_event         = v4l2_ctrl_subscribe_event,
1040        .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
1041};
1042
1043static int bdisp_register_device(struct bdisp_dev *bdisp)
1044{
1045        int ret;
1046
1047        if (!bdisp)
1048                return -ENODEV;
1049
1050        bdisp->vdev.fops        = &bdisp_fops;
1051        bdisp->vdev.ioctl_ops   = &bdisp_ioctl_ops;
1052        bdisp->vdev.release     = video_device_release_empty;
1053        bdisp->vdev.lock        = &bdisp->lock;
1054        bdisp->vdev.vfl_dir     = VFL_DIR_M2M;
1055        bdisp->vdev.v4l2_dev    = &bdisp->v4l2_dev;
1056        bdisp->vdev.device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M;
1057        snprintf(bdisp->vdev.name, sizeof(bdisp->vdev.name), "%s.%d",
1058                 BDISP_NAME, bdisp->id);
1059
1060        video_set_drvdata(&bdisp->vdev, bdisp);
1061
1062        bdisp->m2m.vdev = &bdisp->vdev;
1063        bdisp->m2m.m2m_dev = v4l2_m2m_init(&bdisp_m2m_ops);
1064        if (IS_ERR(bdisp->m2m.m2m_dev)) {
1065                dev_err(bdisp->dev, "failed to initialize v4l2-m2m device\n");
1066                return PTR_ERR(bdisp->m2m.m2m_dev);
1067        }
1068
1069        ret = video_register_device(&bdisp->vdev, VFL_TYPE_GRABBER, -1);
1070        if (ret) {
1071                dev_err(bdisp->dev,
1072                        "%s(): failed to register video device\n", __func__);
1073                v4l2_m2m_release(bdisp->m2m.m2m_dev);
1074                return ret;
1075        }
1076
1077        return 0;
1078}
1079
1080static void bdisp_unregister_device(struct bdisp_dev *bdisp)
1081{
1082        if (!bdisp)
1083                return;
1084
1085        if (bdisp->m2m.m2m_dev)
1086                v4l2_m2m_release(bdisp->m2m.m2m_dev);
1087
1088        video_unregister_device(bdisp->m2m.vdev);
1089}
1090
1091static irqreturn_t bdisp_irq_thread(int irq, void *priv)
1092{
1093        struct bdisp_dev *bdisp = priv;
1094        struct bdisp_ctx *ctx;
1095
1096        spin_lock(&bdisp->slock);
1097
1098        bdisp_dbg_perf_end(bdisp);
1099
1100        cancel_delayed_work(&bdisp->timeout_work);
1101
1102        if (!test_and_clear_bit(ST_M2M_RUNNING, &bdisp->state))
1103                goto isr_unlock;
1104
1105        if (test_and_clear_bit(ST_M2M_SUSPENDING, &bdisp->state)) {
1106                set_bit(ST_M2M_SUSPENDED, &bdisp->state);
1107                wake_up(&bdisp->irq_queue);
1108                goto isr_unlock;
1109        }
1110
1111        ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
1112        if (!ctx || !ctx->fh.m2m_ctx)
1113                goto isr_unlock;
1114
1115        spin_unlock(&bdisp->slock);
1116
1117        bdisp_job_finish(ctx, VB2_BUF_STATE_DONE);
1118
1119        if (bdisp_ctx_state_is_set(BDISP_CTX_STOP_REQ, ctx)) {
1120                bdisp_ctx_state_lock_clear(BDISP_CTX_STOP_REQ, ctx);
1121                wake_up(&bdisp->irq_queue);
1122        }
1123
1124        return IRQ_HANDLED;
1125
1126isr_unlock:
1127        spin_unlock(&bdisp->slock);
1128
1129        return IRQ_HANDLED;
1130}
1131
1132static irqreturn_t bdisp_irq_handler(int irq, void *priv)
1133{
1134        if (bdisp_hw_get_and_clear_irq((struct bdisp_dev *)priv))
1135                return IRQ_NONE;
1136        else
1137                return IRQ_WAKE_THREAD;
1138}
1139
1140static void bdisp_irq_timeout(struct work_struct *ptr)
1141{
1142        struct delayed_work *twork = to_delayed_work(ptr);
1143        struct bdisp_dev *bdisp = container_of(twork, struct bdisp_dev,
1144                        timeout_work);
1145        struct bdisp_ctx *ctx;
1146
1147        ctx = v4l2_m2m_get_curr_priv(bdisp->m2m.m2m_dev);
1148
1149        dev_err(ctx->bdisp_dev->dev, "Device work timeout\n");
1150
1151        spin_lock(&bdisp->slock);
1152        clear_bit(ST_M2M_RUNNING, &bdisp->state);
1153        spin_unlock(&bdisp->slock);
1154
1155        bdisp_hw_reset(bdisp);
1156
1157        bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
1158}
1159
1160static int bdisp_m2m_suspend(struct bdisp_dev *bdisp)
1161{
1162        unsigned long flags;
1163        int timeout;
1164
1165        spin_lock_irqsave(&bdisp->slock, flags);
1166        if (!test_bit(ST_M2M_RUNNING, &bdisp->state)) {
1167                spin_unlock_irqrestore(&bdisp->slock, flags);
1168                return 0;
1169        }
1170        clear_bit(ST_M2M_SUSPENDED, &bdisp->state);
1171        set_bit(ST_M2M_SUSPENDING, &bdisp->state);
1172        spin_unlock_irqrestore(&bdisp->slock, flags);
1173
1174        timeout = wait_event_timeout(bdisp->irq_queue,
1175                                     test_bit(ST_M2M_SUSPENDED, &bdisp->state),
1176                                     BDISP_WORK_TIMEOUT);
1177
1178        clear_bit(ST_M2M_SUSPENDING, &bdisp->state);
1179
1180        if (!timeout) {
1181                dev_err(bdisp->dev, "%s IRQ timeout\n", __func__);
1182                return -EAGAIN;
1183        }
1184
1185        return 0;
1186}
1187
1188static int bdisp_m2m_resume(struct bdisp_dev *bdisp)
1189{
1190        struct bdisp_ctx *ctx;
1191        unsigned long flags;
1192
1193        spin_lock_irqsave(&bdisp->slock, flags);
1194        ctx = bdisp->m2m.ctx;
1195        bdisp->m2m.ctx = NULL;
1196        spin_unlock_irqrestore(&bdisp->slock, flags);
1197
1198        if (test_and_clear_bit(ST_M2M_SUSPENDED, &bdisp->state))
1199                bdisp_job_finish(ctx, VB2_BUF_STATE_ERROR);
1200
1201        return 0;
1202}
1203
1204static int bdisp_runtime_resume(struct device *dev)
1205{
1206        struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1207        int ret = clk_enable(bdisp->clock);
1208
1209        if (ret)
1210                return ret;
1211
1212        return bdisp_m2m_resume(bdisp);
1213}
1214
1215static int bdisp_runtime_suspend(struct device *dev)
1216{
1217        struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1218        int ret = bdisp_m2m_suspend(bdisp);
1219
1220        if (!ret)
1221                clk_disable(bdisp->clock);
1222
1223        return ret;
1224}
1225
1226static int bdisp_resume(struct device *dev)
1227{
1228        struct bdisp_dev *bdisp = dev_get_drvdata(dev);
1229        unsigned long flags;
1230        int opened;
1231
1232        spin_lock_irqsave(&bdisp->slock, flags);
1233        opened = test_bit(ST_M2M_OPEN, &bdisp->state);
1234        spin_unlock_irqrestore(&bdisp->slock, flags);
1235
1236        if (!opened)
1237                return 0;
1238
1239        if (!pm_runtime_suspended(dev))
1240                return bdisp_runtime_resume(dev);
1241
1242        return 0;
1243}
1244
1245static int bdisp_suspend(struct device *dev)
1246{
1247        if (!pm_runtime_suspended(dev))
1248                return bdisp_runtime_suspend(dev);
1249
1250        return 0;
1251}
1252
1253static const struct dev_pm_ops bdisp_pm_ops = {
1254        .suspend                = bdisp_suspend,
1255        .resume                 = bdisp_resume,
1256        .runtime_suspend        = bdisp_runtime_suspend,
1257        .runtime_resume         = bdisp_runtime_resume,
1258};
1259
1260static int bdisp_remove(struct platform_device *pdev)
1261{
1262        struct bdisp_dev *bdisp = platform_get_drvdata(pdev);
1263
1264        bdisp_unregister_device(bdisp);
1265
1266        bdisp_hw_free_filters(bdisp->dev);
1267
1268        pm_runtime_disable(&pdev->dev);
1269
1270        bdisp_debugfs_remove(bdisp);
1271
1272        v4l2_device_unregister(&bdisp->v4l2_dev);
1273
1274        if (!IS_ERR(bdisp->clock))
1275                clk_unprepare(bdisp->clock);
1276
1277        destroy_workqueue(bdisp->work_queue);
1278
1279        dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
1280
1281        return 0;
1282}
1283
1284static int bdisp_probe(struct platform_device *pdev)
1285{
1286        struct bdisp_dev *bdisp;
1287        struct resource *res;
1288        struct device *dev = &pdev->dev;
1289        int ret;
1290
1291        dev_dbg(dev, "%s\n", __func__);
1292
1293        bdisp = devm_kzalloc(dev, sizeof(struct bdisp_dev), GFP_KERNEL);
1294        if (!bdisp)
1295                return -ENOMEM;
1296
1297        ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
1298        if (ret)
1299                return ret;
1300
1301        bdisp->pdev = pdev;
1302        bdisp->dev = dev;
1303        platform_set_drvdata(pdev, bdisp);
1304
1305        if (dev->of_node)
1306                bdisp->id = of_alias_get_id(pdev->dev.of_node, BDISP_NAME);
1307        else
1308                bdisp->id = pdev->id;
1309
1310        init_waitqueue_head(&bdisp->irq_queue);
1311        INIT_DELAYED_WORK(&bdisp->timeout_work, bdisp_irq_timeout);
1312        bdisp->work_queue = create_workqueue(BDISP_NAME);
1313
1314        spin_lock_init(&bdisp->slock);
1315        mutex_init(&bdisp->lock);
1316
1317        /* get resources */
1318        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1319        bdisp->regs = devm_ioremap_resource(dev, res);
1320        if (IS_ERR(bdisp->regs)) {
1321                dev_err(dev, "failed to get regs\n");
1322                ret = PTR_ERR(bdisp->regs);
1323                goto err_wq;
1324        }
1325
1326        bdisp->clock = devm_clk_get(dev, BDISP_NAME);
1327        if (IS_ERR(bdisp->clock)) {
1328                dev_err(dev, "failed to get clock\n");
1329                ret = PTR_ERR(bdisp->clock);
1330                goto err_wq;
1331        }
1332
1333        ret = clk_prepare(bdisp->clock);
1334        if (ret < 0) {
1335                dev_err(dev, "clock prepare failed\n");
1336                bdisp->clock = ERR_PTR(-EINVAL);
1337                goto err_wq;
1338        }
1339
1340        res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1341        if (!res) {
1342                dev_err(dev, "failed to get IRQ resource\n");
1343                ret = -EINVAL;
1344                goto err_clk;
1345        }
1346
1347        ret = devm_request_threaded_irq(dev, res->start, bdisp_irq_handler,
1348                                        bdisp_irq_thread, IRQF_ONESHOT,
1349                                        pdev->name, bdisp);
1350        if (ret) {
1351                dev_err(dev, "failed to install irq\n");
1352                goto err_clk;
1353        }
1354
1355        /* v4l2 register */
1356        ret = v4l2_device_register(dev, &bdisp->v4l2_dev);
1357        if (ret) {
1358                dev_err(dev, "failed to register\n");
1359                goto err_clk;
1360        }
1361
1362        /* Debug */
1363        ret = bdisp_debugfs_create(bdisp);
1364        if (ret) {
1365                dev_err(dev, "failed to create debugfs\n");
1366                goto err_v4l2;
1367        }
1368
1369        /* Power management */
1370        pm_runtime_enable(dev);
1371        ret = pm_runtime_get_sync(dev);
1372        if (ret < 0) {
1373                dev_err(dev, "failed to set PM\n");
1374                goto err_dbg;
1375        }
1376
1377        /* Filters */
1378        if (bdisp_hw_alloc_filters(bdisp->dev)) {
1379                dev_err(bdisp->dev, "no memory for filters\n");
1380                ret = -ENOMEM;
1381                goto err_pm;
1382        }
1383
1384        /* Register */
1385        ret = bdisp_register_device(bdisp);
1386        if (ret) {
1387                dev_err(dev, "failed to register\n");
1388                goto err_filter;
1389        }
1390
1391        dev_info(dev, "%s%d registered as /dev/video%d\n", BDISP_NAME,
1392                 bdisp->id, bdisp->vdev.num);
1393
1394        pm_runtime_put(dev);
1395
1396        return 0;
1397
1398err_filter:
1399        bdisp_hw_free_filters(bdisp->dev);
1400err_pm:
1401        pm_runtime_put(dev);
1402err_dbg:
1403        bdisp_debugfs_remove(bdisp);
1404err_v4l2:
1405        v4l2_device_unregister(&bdisp->v4l2_dev);
1406err_clk:
1407        if (!IS_ERR(bdisp->clock))
1408                clk_unprepare(bdisp->clock);
1409err_wq:
1410        destroy_workqueue(bdisp->work_queue);
1411        return ret;
1412}
1413
1414static const struct of_device_id bdisp_match_types[] = {
1415        {
1416                .compatible = "st,stih407-bdisp",
1417        },
1418        { /* end node */ }
1419};
1420
1421MODULE_DEVICE_TABLE(of, bdisp_match_types);
1422
1423static struct platform_driver bdisp_driver = {
1424        .probe          = bdisp_probe,
1425        .remove         = bdisp_remove,
1426        .driver         = {
1427                .name           = BDISP_NAME,
1428                .of_match_table = bdisp_match_types,
1429                .pm             = &bdisp_pm_ops,
1430        },
1431};
1432
1433module_platform_driver(bdisp_driver);
1434
1435MODULE_DESCRIPTION("2D blitter for STMicroelectronics SoC");
1436MODULE_AUTHOR("Fabien Dessenne <fabien.dessenne@st.com>");
1437MODULE_LICENSE("GPL");
1438