drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c

   1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
   2 /*
   3  * Rockchip ISP1 Driver - Stats subdevice
   4  *
   5  * Copyright (C) 2017 Rockchip Electronics Co., Ltd.
   6  */
   7
   8 #include <media/v4l2-common.h>
   9 #include <media/v4l2-event.h>
  10 #include <media/v4l2-ioctl.h>
  11 #include <media/videobuf2-core.h>
  12 #include <media/videobuf2-vmalloc.h>    /* for ISP statistics */
  13
  14 #include "rkisp1-common.h"
  15
  16 #define RKISP1_STATS_DEV_NAME   RKISP1_DRIVER_NAME "_stats"
  17
  18 #define RKISP1_ISP_STATS_REQ_BUFS_MIN 2
  19 #define RKISP1_ISP_STATS_REQ_BUFS_MAX 8
  20
  21 static int rkisp1_stats_enum_fmt_meta_cap(struct file *file, void *priv,
  22                                           struct v4l2_fmtdesc *f)
  23 {
  24         struct video_device *video = video_devdata(file);
  25         struct rkisp1_stats *stats = video_get_drvdata(video);
  26
  27         if (f->index > 0 || f->type != video->queue->type)
  28                 return -EINVAL;
  29
  30         f->pixelformat = stats->vdev_fmt.fmt.meta.dataformat;
  31         return 0;
  32 }
  33
  34 static int rkisp1_stats_g_fmt_meta_cap(struct file *file, void *priv,
  35                                        struct v4l2_format *f)
  36 {
  37         struct video_device *video = video_devdata(file);
  38         struct rkisp1_stats *stats = video_get_drvdata(video);
  39         struct v4l2_meta_format *meta = &f->fmt.meta;
  40
  41         if (f->type != video->queue->type)
  42                 return -EINVAL;
  43
  44         memset(meta, 0, sizeof(*meta));
  45         meta->dataformat = stats->vdev_fmt.fmt.meta.dataformat;
  46         meta->buffersize = stats->vdev_fmt.fmt.meta.buffersize;
  47
  48         return 0;
  49 }
  50
  51 static int rkisp1_stats_querycap(struct file *file,
  52                                  void *priv, struct v4l2_capability *cap)
  53 {
  54         struct video_device *vdev = video_devdata(file);
  55
  56         strscpy(cap->driver, RKISP1_DRIVER_NAME, sizeof(cap->driver));
  57         strscpy(cap->card, vdev->name, sizeof(cap->card));
  58         strscpy(cap->bus_info, RKISP1_BUS_INFO, sizeof(cap->bus_info));
  59
  60         return 0;
  61 }
  62
  63 /* ISP video device IOCTLs */
  64 static const struct v4l2_ioctl_ops rkisp1_stats_ioctl = {
  65         .vidioc_reqbufs = vb2_ioctl_reqbufs,
  66         .vidioc_querybuf = vb2_ioctl_querybuf,
  67         .vidioc_create_bufs = vb2_ioctl_create_bufs,
  68         .vidioc_qbuf = vb2_ioctl_qbuf,
  69         .vidioc_dqbuf = vb2_ioctl_dqbuf,
  70         .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
  71         .vidioc_expbuf = vb2_ioctl_expbuf,
  72         .vidioc_streamon = vb2_ioctl_streamon,
  73         .vidioc_streamoff = vb2_ioctl_streamoff,
  74         .vidioc_enum_fmt_meta_cap = rkisp1_stats_enum_fmt_meta_cap,
  75         .vidioc_g_fmt_meta_cap = rkisp1_stats_g_fmt_meta_cap,
  76         .vidioc_s_fmt_meta_cap = rkisp1_stats_g_fmt_meta_cap,
  77         .vidioc_try_fmt_meta_cap = rkisp1_stats_g_fmt_meta_cap,
  78         .vidioc_querycap = rkisp1_stats_querycap,
  79         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
  80         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
  81 };
  82
  83 static const struct v4l2_file_operations rkisp1_stats_fops = {
  84         .mmap = vb2_fop_mmap,
  85         .unlocked_ioctl = video_ioctl2,
  86         .poll = vb2_fop_poll,
  87         .open = v4l2_fh_open,
  88         .release = vb2_fop_release
  89 };
  90
  91 static int rkisp1_stats_vb2_queue_setup(struct vb2_queue *vq,
  92                                         unsigned int *num_buffers,
  93                                         unsigned int *num_planes,
  94                                         unsigned int sizes[],
  95                                         struct device *alloc_devs[])
  96 {
  97         *num_planes = 1;
  98
  99         *num_buffers = clamp_t(u32, *num_buffers, RKISP1_ISP_STATS_REQ_BUFS_MIN,
 100                                RKISP1_ISP_STATS_REQ_BUFS_MAX);
 101
 102         sizes[0] = sizeof(struct rkisp1_stat_buffer);
 103
 104         return 0;
 105 }
 106
 107 static void rkisp1_stats_vb2_buf_queue(struct vb2_buffer *vb)
 108 {
 109         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 110         struct rkisp1_buffer *stats_buf =
 111                 container_of(vbuf, struct rkisp1_buffer, vb);
 112         struct vb2_queue *vq = vb->vb2_queue;
 113         struct rkisp1_stats *stats_dev = vq->drv_priv;
 114
 115         stats_buf->vaddr = vb2_plane_vaddr(vb, 0);
 116
 117         spin_lock_irq(&stats_dev->lock);
 118         list_add_tail(&stats_buf->queue, &stats_dev->stat);
 119         spin_unlock_irq(&stats_dev->lock);
 120 }
 121
 122 static int rkisp1_stats_vb2_buf_prepare(struct vb2_buffer *vb)
 123 {
 124         if (vb2_plane_size(vb, 0) < sizeof(struct rkisp1_stat_buffer))
 125                 return -EINVAL;
 126
 127         vb2_set_plane_payload(vb, 0, sizeof(struct rkisp1_stat_buffer));
 128
 129         return 0;
 130 }
 131
 132 static void rkisp1_stats_vb2_stop_streaming(struct vb2_queue *vq)
 133 {
 134         struct rkisp1_stats *stats = vq->drv_priv;
 135         struct rkisp1_buffer *buf;
 136         unsigned int i;
 137
 138         spin_lock_irq(&stats->lock);
 139         for (i = 0; i < RKISP1_ISP_STATS_REQ_BUFS_MAX; i++) {
 140                 if (list_empty(&stats->stat))
 141                         break;
 142                 buf = list_first_entry(&stats->stat,
 143                                        struct rkisp1_buffer, queue);
 144                 list_del(&buf->queue);
 145                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 146         }
 147         spin_unlock_irq(&stats->lock);
 148 }
 149
 150 static const struct vb2_ops rkisp1_stats_vb2_ops = {
 151         .queue_setup = rkisp1_stats_vb2_queue_setup,
 152         .buf_queue = rkisp1_stats_vb2_buf_queue,
 153         .buf_prepare = rkisp1_stats_vb2_buf_prepare,
 154         .wait_prepare = vb2_ops_wait_prepare,
 155         .wait_finish = vb2_ops_wait_finish,
 156         .stop_streaming = rkisp1_stats_vb2_stop_streaming,
 157 };
 158
 159 static int
 160 rkisp1_stats_init_vb2_queue(struct vb2_queue *q, struct rkisp1_stats *stats)
 161 {
 162         struct rkisp1_vdev_node *node;
 163
 164         node = container_of(q, struct rkisp1_vdev_node, buf_queue);
 165
 166         q->type = V4L2_BUF_TYPE_META_CAPTURE;
 167         q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
 168         q->drv_priv = stats;
 169         q->ops = &rkisp1_stats_vb2_ops;
 170         q->mem_ops = &vb2_vmalloc_memops;
 171         q->buf_struct_size = sizeof(struct rkisp1_buffer);
 172         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 173         q->lock = &node->vlock;
 174
 175         return vb2_queue_init(q);
 176 }
 177
 178 static void rkisp1_stats_get_awb_meas(struct rkisp1_stats *stats,
 179                                       struct rkisp1_stat_buffer *pbuf)
 180 {
 181         /* Protect against concurrent access from ISR? */
 182         struct rkisp1_device *rkisp1 = stats->rkisp1;
 183         u32 reg_val;
 184
 185         pbuf->meas_type |= RKISP1_CIF_ISP_STAT_AWB;
 186         reg_val = rkisp1_read(rkisp1, RKISP1_CIF_ISP_AWB_WHITE_CNT);
 187         pbuf->params.awb.awb_mean[0].cnt =
 188                                 RKISP1_CIF_ISP_AWB_GET_PIXEL_CNT(reg_val);
 189         reg_val = rkisp1_read(rkisp1, RKISP1_CIF_ISP_AWB_MEAN);
 190
 191         pbuf->params.awb.awb_mean[0].mean_cr_or_r =
 192                                 RKISP1_CIF_ISP_AWB_GET_MEAN_CR_R(reg_val);
 193         pbuf->params.awb.awb_mean[0].mean_cb_or_b =
 194                                 RKISP1_CIF_ISP_AWB_GET_MEAN_CB_B(reg_val);
 195         pbuf->params.awb.awb_mean[0].mean_y_or_g =
 196                                 RKISP1_CIF_ISP_AWB_GET_MEAN_Y_G(reg_val);
 197 }
 198
 199 static void rkisp1_stats_get_aec_meas(struct rkisp1_stats *stats,
 200                                       struct rkisp1_stat_buffer *pbuf)
 201 {
 202         struct rkisp1_device *rkisp1 = stats->rkisp1;
 203         unsigned int i;
 204
 205         pbuf->meas_type |= RKISP1_CIF_ISP_STAT_AUTOEXP;
 206         for (i = 0; i < RKISP1_CIF_ISP_AE_MEAN_MAX; i++)
 207                 pbuf->params.ae.exp_mean[i] =
 208                         (u8)rkisp1_read(rkisp1,
 209                                         RKISP1_CIF_ISP_EXP_MEAN_00 + i * 4);
 210 }
 211
 212 static void rkisp1_stats_get_afc_meas(struct rkisp1_stats *stats,
 213                                       struct rkisp1_stat_buffer *pbuf)
 214 {
 215         struct rkisp1_device *rkisp1 = stats->rkisp1;
 216         struct rkisp1_cif_isp_af_stat *af;
 217
 218         pbuf->meas_type |= RKISP1_CIF_ISP_STAT_AFM;
 219
 220         af = &pbuf->params.af;
 221         af->window[0].sum = rkisp1_read(rkisp1, RKISP1_CIF_ISP_AFM_SUM_A);
 222         af->window[0].lum = rkisp1_read(rkisp1, RKISP1_CIF_ISP_AFM_LUM_A);
 223         af->window[1].sum = rkisp1_read(rkisp1, RKISP1_CIF_ISP_AFM_SUM_B);
 224         af->window[1].lum = rkisp1_read(rkisp1, RKISP1_CIF_ISP_AFM_LUM_B);
 225         af->window[2].sum = rkisp1_read(rkisp1, RKISP1_CIF_ISP_AFM_SUM_C);
 226         af->window[2].lum = rkisp1_read(rkisp1, RKISP1_CIF_ISP_AFM_LUM_C);
 227 }
 228
 229 static void rkisp1_stats_get_hst_meas(struct rkisp1_stats *stats,
 230                                       struct rkisp1_stat_buffer *pbuf)
 231 {
 232         struct rkisp1_device *rkisp1 = stats->rkisp1;
 233         unsigned int i;
 234
 235         pbuf->meas_type |= RKISP1_CIF_ISP_STAT_HIST;
 236         for (i = 0; i < RKISP1_CIF_ISP_HIST_BIN_N_MAX; i++)
 237                 pbuf->params.hist.hist_bins[i] =
 238                         (u8)rkisp1_read(rkisp1,
 239                                         RKISP1_CIF_ISP_HIST_BIN_0 + i * 4);
 240 }
 241
 242 static void rkisp1_stats_get_bls_meas(struct rkisp1_stats *stats,
 243                                       struct rkisp1_stat_buffer *pbuf)
 244 {
 245         struct rkisp1_device *rkisp1 = stats->rkisp1;
 246         const struct rkisp1_isp_mbus_info *in_fmt = rkisp1->isp.sink_fmt;
 247         struct rkisp1_cif_isp_bls_meas_val *bls_val;
 248
 249         bls_val = &pbuf->params.ae.bls_val;
 250         if (in_fmt->bayer_pat == RKISP1_RAW_BGGR) {
 251                 bls_val->meas_b =
 252                         rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_A_MEASURED);
 253                 bls_val->meas_gb =
 254                         rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_B_MEASURED);
 255                 bls_val->meas_gr =
 256                         rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_C_MEASURED);
 257                 bls_val->meas_r =
 258                         rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_D_MEASURED);
 259         } else if (in_fmt->bayer_pat == RKISP1_RAW_GBRG) {
 260                 bls_val->meas_gb =
 261                         rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_A_MEASURED);
 262                 bls_val->meas_b =
 263                         rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_B_MEASURED);
 264                 bls_val->meas_r =
 265                         rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_C_MEASURED);
 266                 bls_val->meas_gr =
 267                         rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_D_MEASURED);
 268         } else if (in_fmt->bayer_pat == RKISP1_RAW_GRBG) {
 269                 bls_val->meas_gr =
 270                         rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_A_MEASURED);
 271                 bls_val->meas_r =
 272                         rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_B_MEASURED);
 273                 bls_val->meas_b =
 274                         rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_C_MEASURED);
 275                 bls_val->meas_gb =
 276                         rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_D_MEASURED);
 277         } else if (in_fmt->bayer_pat == RKISP1_RAW_RGGB) {
 278                 bls_val->meas_r =
 279                         rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_A_MEASURED);
 280                 bls_val->meas_gr =
 281                         rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_B_MEASURED);
 282                 bls_val->meas_gb =
 283                         rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_C_MEASURED);
 284                 bls_val->meas_b =
 285                         rkisp1_read(rkisp1, RKISP1_CIF_ISP_BLS_D_MEASURED);
 286         }
 287 }
 288
 289 static void
 290 rkisp1_stats_send_measurement(struct rkisp1_stats *stats, u32 isp_ris)
 291 {
 292         struct rkisp1_stat_buffer *cur_stat_buf;
 293         struct rkisp1_buffer *cur_buf = NULL;
 294         unsigned int frame_sequence = stats->rkisp1->isp.frame_sequence;
 295         u64 timestamp = ktime_get_ns();
 296
 297         /* get one empty buffer */
 298         if (!list_empty(&stats->stat)) {
 299                 cur_buf = list_first_entry(&stats->stat,
 300                                            struct rkisp1_buffer, queue);
 301                 list_del(&cur_buf->queue);
 302         }
 303
 304         if (!cur_buf)
 305                 return;
 306
 307         cur_stat_buf =
 308                 (struct rkisp1_stat_buffer *)(cur_buf->vaddr);
 309
 310         if (isp_ris & RKISP1_CIF_ISP_AWB_DONE)
 311                 rkisp1_stats_get_awb_meas(stats, cur_stat_buf);
 312
 313         if (isp_ris & RKISP1_CIF_ISP_AFM_FIN)
 314                 rkisp1_stats_get_afc_meas(stats, cur_stat_buf);
 315
 316         if (isp_ris & RKISP1_CIF_ISP_EXP_END) {
 317                 rkisp1_stats_get_aec_meas(stats, cur_stat_buf);
 318                 rkisp1_stats_get_bls_meas(stats, cur_stat_buf);
 319         }
 320
 321         if (isp_ris & RKISP1_CIF_ISP_HIST_MEASURE_RDY)
 322                 rkisp1_stats_get_hst_meas(stats, cur_stat_buf);
 323
 324         vb2_set_plane_payload(&cur_buf->vb.vb2_buf, 0,
 325                               sizeof(struct rkisp1_stat_buffer));
 326         cur_buf->vb.sequence = frame_sequence;
 327         cur_buf->vb.vb2_buf.timestamp = timestamp;
 328         vb2_buffer_done(&cur_buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 329 }
 330
 331 void rkisp1_stats_isr(struct rkisp1_stats *stats, u32 isp_ris)
 332 {
 333         struct rkisp1_device *rkisp1 = stats->rkisp1;
 334         unsigned int isp_mis_tmp = 0;
 335
 336         spin_lock(&stats->lock);
 337
 338         rkisp1_write(rkisp1, RKISP1_STATS_MEAS_MASK, RKISP1_CIF_ISP_ICR);
 339
 340         isp_mis_tmp = rkisp1_read(rkisp1, RKISP1_CIF_ISP_MIS);
 341         if (isp_mis_tmp & RKISP1_STATS_MEAS_MASK)
 342                 rkisp1->debug.stats_error++;
 343
 344         if (isp_ris & RKISP1_STATS_MEAS_MASK)
 345                 rkisp1_stats_send_measurement(stats, isp_ris);
 346
 347         spin_unlock(&stats->lock);
 348 }
 349
 350 static void rkisp1_init_stats(struct rkisp1_stats *stats)
 351 {
 352         stats->vdev_fmt.fmt.meta.dataformat =
 353                 V4L2_META_FMT_RK_ISP1_STAT_3A;
 354         stats->vdev_fmt.fmt.meta.buffersize =
 355                 sizeof(struct rkisp1_stat_buffer);
 356 }
 357
 358 int rkisp1_stats_register(struct rkisp1_device *rkisp1)
 359 {
 360         struct rkisp1_stats *stats = &rkisp1->stats;
 361         struct rkisp1_vdev_node *node = &stats->vnode;
 362         struct video_device *vdev = &node->vdev;
 363         int ret;
 364
 365         stats->rkisp1 = rkisp1;
 366         mutex_init(&node->vlock);
 367         INIT_LIST_HEAD(&stats->stat);
 368         spin_lock_init(&stats->lock);
 369
 370         strscpy(vdev->name, RKISP1_STATS_DEV_NAME, sizeof(vdev->name));
 371
 372         video_set_drvdata(vdev, stats);
 373         vdev->ioctl_ops = &rkisp1_stats_ioctl;
 374         vdev->fops = &rkisp1_stats_fops;
 375         vdev->release = video_device_release_empty;
 376         vdev->lock = &node->vlock;
 377         vdev->v4l2_dev = &rkisp1->v4l2_dev;
 378         vdev->queue = &node->buf_queue;
 379         vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING;
 380         vdev->vfl_dir =  VFL_DIR_RX;
 381         rkisp1_stats_init_vb2_queue(vdev->queue, stats);
 382         rkisp1_init_stats(stats);
 383         video_set_drvdata(vdev, stats);
 384
 385         node->pad.flags = MEDIA_PAD_FL_SINK;
 386         ret = media_entity_pads_init(&vdev->entity, 1, &node->pad);
 387         if (ret)
 388                 goto err_mutex_destroy;
 389
 390         ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
 391         if (ret) {
 392                 dev_err(&vdev->dev,
 393                         "failed to register %s, ret=%d\n", vdev->name, ret);
 394                 goto err_cleanup_media_entity;
 395         }
 396
 397         return 0;
 398
 399 err_cleanup_media_entity:
 400         media_entity_cleanup(&vdev->entity);
 401 err_mutex_destroy:
 402         mutex_destroy(&node->vlock);
 403         return ret;
 404 }
 405
 406 void rkisp1_stats_unregister(struct rkisp1_device *rkisp1)
 407 {
 408         struct rkisp1_stats *stats = &rkisp1->stats;
 409         struct rkisp1_vdev_node *node = &stats->vnode;
 410         struct video_device *vdev = &node->vdev;
 411
 412         vb2_video_unregister_device(vdev);
 413         media_entity_cleanup(&vdev->entity);
 414         mutex_destroy(&node->vlock);
 415 }