drivers/media/platform/sh_vou.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * SuperH Video Output Unit (VOU) driver
   4  *
   5  * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
   6  */
   7
   8 #include <linux/dma-mapping.h>
   9 #include <linux/delay.h>
  10 #include <linux/errno.h>
  11 #include <linux/fs.h>
  12 #include <linux/i2c.h>
  13 #include <linux/init.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/kernel.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/pm_runtime.h>
  18 #include <linux/slab.h>
  19 #include <linux/videodev2.h>
  20 #include <linux/module.h>
  21
  22 #include <media/drv-intf/sh_vou.h>
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-device.h>
  25 #include <media/v4l2-ioctl.h>
  26 #include <media/v4l2-mediabus.h>
  27 #include <media/videobuf2-v4l2.h>
  28 #include <media/videobuf2-dma-contig.h>
  29
  30 /* Mirror addresses are not available for all registers */
  31 #define VOUER   0
  32 #define VOUCR   4
  33 #define VOUSTR  8
  34 #define VOUVCR  0xc
  35 #define VOUISR  0x10
  36 #define VOUBCR  0x14
  37 #define VOUDPR  0x18
  38 #define VOUDSR  0x1c
  39 #define VOUVPR  0x20
  40 #define VOUIR   0x24
  41 #define VOUSRR  0x28
  42 #define VOUMSR  0x2c
  43 #define VOUHIR  0x30
  44 #define VOUDFR  0x34
  45 #define VOUAD1R 0x38
  46 #define VOUAD2R 0x3c
  47 #define VOUAIR  0x40
  48 #define VOUSWR  0x44
  49 #define VOURCR  0x48
  50 #define VOURPR  0x50
  51
  52 enum sh_vou_status {
  53         SH_VOU_IDLE,
  54         SH_VOU_INITIALISING,
  55         SH_VOU_RUNNING,
  56 };
  57
  58 #define VOU_MIN_IMAGE_WIDTH     16
  59 #define VOU_MAX_IMAGE_WIDTH     720
  60 #define VOU_MIN_IMAGE_HEIGHT    16
  61
  62 struct sh_vou_buffer {
  63         struct vb2_v4l2_buffer vb;
  64         struct list_head list;
  65 };
  66
  67 static inline struct
  68 sh_vou_buffer *to_sh_vou_buffer(struct vb2_v4l2_buffer *vb2)
  69 {
  70         return container_of(vb2, struct sh_vou_buffer, vb);
  71 }
  72
  73 struct sh_vou_device {
  74         struct v4l2_device v4l2_dev;
  75         struct video_device vdev;
  76         struct sh_vou_pdata *pdata;
  77         spinlock_t lock;
  78         void __iomem *base;
  79         /* State information */
  80         struct v4l2_pix_format pix;
  81         struct v4l2_rect rect;
  82         struct list_head buf_list;
  83         v4l2_std_id std;
  84         int pix_idx;
  85         struct vb2_queue queue;
  86         struct sh_vou_buffer *active;
  87         enum sh_vou_status status;
  88         unsigned sequence;
  89         struct mutex fop_lock;
  90 };
  91
  92 /* Register access routines for sides A, B and mirror addresses */
  93 static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg,
  94                                u32 value)
  95 {
  96         __raw_writel(value, vou_dev->base + reg);
  97 }
  98
  99 static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg,
 100                                 u32 value)
 101 {
 102         __raw_writel(value, vou_dev->base + reg);
 103         __raw_writel(value, vou_dev->base + reg + 0x1000);
 104 }
 105
 106 static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg,
 107                                u32 value)
 108 {
 109         __raw_writel(value, vou_dev->base + reg + 0x2000);
 110 }
 111
 112 static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg)
 113 {
 114         return __raw_readl(vou_dev->base + reg);
 115 }
 116
 117 static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg,
 118                              u32 value, u32 mask)
 119 {
 120         u32 old = __raw_readl(vou_dev->base + reg);
 121
 122         value = (value & mask) | (old & ~mask);
 123         __raw_writel(value, vou_dev->base + reg);
 124 }
 125
 126 static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg,
 127                              u32 value, u32 mask)
 128 {
 129         sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask);
 130 }
 131
 132 static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg,
 133                               u32 value, u32 mask)
 134 {
 135         sh_vou_reg_a_set(vou_dev, reg, value, mask);
 136         sh_vou_reg_b_set(vou_dev, reg, value, mask);
 137 }
 138
 139 struct sh_vou_fmt {
 140         u32             pfmt;
 141         char            *desc;
 142         unsigned char   bpp;
 143         unsigned char   bpl;
 144         unsigned char   rgb;
 145         unsigned char   yf;
 146         unsigned char   pkf;
 147 };
 148
 149 /* Further pixel formats can be added */
 150 static struct sh_vou_fmt vou_fmt[] = {
 151         {
 152                 .pfmt   = V4L2_PIX_FMT_NV12,
 153                 .bpp    = 12,
 154                 .bpl    = 1,
 155                 .desc   = "YVU420 planar",
 156                 .yf     = 0,
 157                 .rgb    = 0,
 158         },
 159         {
 160                 .pfmt   = V4L2_PIX_FMT_NV16,
 161                 .bpp    = 16,
 162                 .bpl    = 1,
 163                 .desc   = "YVYU planar",
 164                 .yf     = 1,
 165                 .rgb    = 0,
 166         },
 167         {
 168                 .pfmt   = V4L2_PIX_FMT_RGB24,
 169                 .bpp    = 24,
 170                 .bpl    = 3,
 171                 .desc   = "RGB24",
 172                 .pkf    = 2,
 173                 .rgb    = 1,
 174         },
 175         {
 176                 .pfmt   = V4L2_PIX_FMT_RGB565,
 177                 .bpp    = 16,
 178                 .bpl    = 2,
 179                 .desc   = "RGB565",
 180                 .pkf    = 3,
 181                 .rgb    = 1,
 182         },
 183         {
 184                 .pfmt   = V4L2_PIX_FMT_RGB565X,
 185                 .bpp    = 16,
 186                 .bpl    = 2,
 187                 .desc   = "RGB565 byteswapped",
 188                 .pkf    = 3,
 189                 .rgb    = 1,
 190         },
 191 };
 192
 193 static void sh_vou_schedule_next(struct sh_vou_device *vou_dev,
 194                                  struct vb2_v4l2_buffer *vbuf)
 195 {
 196         dma_addr_t addr1, addr2;
 197
 198         addr1 = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf, 0);
 199         switch (vou_dev->pix.pixelformat) {
 200         case V4L2_PIX_FMT_NV12:
 201         case V4L2_PIX_FMT_NV16:
 202                 addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height;
 203                 break;
 204         default:
 205                 addr2 = 0;
 206         }
 207
 208         sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1);
 209         sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2);
 210 }
 211
 212 static void sh_vou_stream_config(struct sh_vou_device *vou_dev)
 213 {
 214         unsigned int row_coeff;
 215 #ifdef __LITTLE_ENDIAN
 216         u32 dataswap = 7;
 217 #else
 218         u32 dataswap = 0;
 219 #endif
 220
 221         switch (vou_dev->pix.pixelformat) {
 222         default:
 223         case V4L2_PIX_FMT_NV12:
 224         case V4L2_PIX_FMT_NV16:
 225                 row_coeff = 1;
 226                 break;
 227         case V4L2_PIX_FMT_RGB565:
 228                 dataswap ^= 1;
 229                 /* fall through */
 230         case V4L2_PIX_FMT_RGB565X:
 231                 row_coeff = 2;
 232                 break;
 233         case V4L2_PIX_FMT_RGB24:
 234                 row_coeff = 3;
 235                 break;
 236         }
 237
 238         sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
 239         sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
 240 }
 241
 242 /* Locking: caller holds fop_lock mutex */
 243 static int sh_vou_queue_setup(struct vb2_queue *vq,
 244                        unsigned int *nbuffers, unsigned int *nplanes,
 245                        unsigned int sizes[], struct device *alloc_devs[])
 246 {
 247         struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
 248         struct v4l2_pix_format *pix = &vou_dev->pix;
 249         int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
 250
 251         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 252
 253         if (*nplanes)
 254                 return sizes[0] < pix->height * bytes_per_line ? -EINVAL : 0;
 255         *nplanes = 1;
 256         sizes[0] = pix->height * bytes_per_line;
 257         return 0;
 258 }
 259
 260 static int sh_vou_buf_prepare(struct vb2_buffer *vb)
 261 {
 262         struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
 263         struct v4l2_pix_format *pix = &vou_dev->pix;
 264         unsigned bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
 265         unsigned size = pix->height * bytes_per_line;
 266
 267         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 268
 269         if (vb2_plane_size(vb, 0) < size) {
 270                 /* User buffer too small */
 271                 dev_warn(vou_dev->v4l2_dev.dev, "buffer too small (%lu < %u)\n",
 272                          vb2_plane_size(vb, 0), size);
 273                 return -EINVAL;
 274         }
 275
 276         vb2_set_plane_payload(vb, 0, size);
 277         return 0;
 278 }
 279
 280 /* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */
 281 static void sh_vou_buf_queue(struct vb2_buffer *vb)
 282 {
 283         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 284         struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
 285         struct sh_vou_buffer *shbuf = to_sh_vou_buffer(vbuf);
 286         unsigned long flags;
 287
 288         spin_lock_irqsave(&vou_dev->lock, flags);
 289         list_add_tail(&shbuf->list, &vou_dev->buf_list);
 290         spin_unlock_irqrestore(&vou_dev->lock, flags);
 291 }
 292
 293 static int sh_vou_start_streaming(struct vb2_queue *vq, unsigned int count)
 294 {
 295         struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
 296         struct sh_vou_buffer *buf, *node;
 297         int ret;
 298
 299         vou_dev->sequence = 0;
 300         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
 301                                          video, s_stream, 1);
 302         if (ret < 0 && ret != -ENOIOCTLCMD) {
 303                 list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
 304                         vb2_buffer_done(&buf->vb.vb2_buf,
 305                                         VB2_BUF_STATE_QUEUED);
 306                         list_del(&buf->list);
 307                 }
 308                 vou_dev->active = NULL;
 309                 return ret;
 310         }
 311
 312         buf = list_entry(vou_dev->buf_list.next, struct sh_vou_buffer, list);
 313
 314         vou_dev->active = buf;
 315
 316         /* Start from side A: we use mirror addresses, so, set B */
 317         sh_vou_reg_a_write(vou_dev, VOURPR, 1);
 318         dev_dbg(vou_dev->v4l2_dev.dev, "%s: first buffer status 0x%x\n",
 319                 __func__, sh_vou_reg_a_read(vou_dev, VOUSTR));
 320         sh_vou_schedule_next(vou_dev, &buf->vb);
 321
 322         buf = list_entry(buf->list.next, struct sh_vou_buffer, list);
 323
 324         /* Second buffer - initialise register side B */
 325         sh_vou_reg_a_write(vou_dev, VOURPR, 0);
 326         sh_vou_schedule_next(vou_dev, &buf->vb);
 327
 328         /* Register side switching with frame VSYNC */
 329         sh_vou_reg_a_write(vou_dev, VOURCR, 5);
 330
 331         sh_vou_stream_config(vou_dev);
 332         /* Enable End-of-Frame (VSYNC) interrupts */
 333         sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
 334
 335         /* Two buffers on the queue - activate the hardware */
 336         vou_dev->status = SH_VOU_RUNNING;
 337         sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
 338         return 0;
 339 }
 340
 341 static void sh_vou_stop_streaming(struct vb2_queue *vq)
 342 {
 343         struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
 344         struct sh_vou_buffer *buf, *node;
 345         unsigned long flags;
 346
 347         v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
 348                                          video, s_stream, 0);
 349         /* disable output */
 350         sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
 351         /* ...but the current frame will complete */
 352         sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
 353         msleep(50);
 354         spin_lock_irqsave(&vou_dev->lock, flags);
 355         list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
 356                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 357                 list_del(&buf->list);
 358         }
 359         vou_dev->active = NULL;
 360         spin_unlock_irqrestore(&vou_dev->lock, flags);
 361 }
 362
 363 static const struct vb2_ops sh_vou_qops = {
 364         .queue_setup            = sh_vou_queue_setup,
 365         .buf_prepare            = sh_vou_buf_prepare,
 366         .buf_queue              = sh_vou_buf_queue,
 367         .start_streaming        = sh_vou_start_streaming,
 368         .stop_streaming         = sh_vou_stop_streaming,
 369         .wait_prepare           = vb2_ops_wait_prepare,
 370         .wait_finish            = vb2_ops_wait_finish,
 371 };
 372
 373 /* Video IOCTLs */
 374 static int sh_vou_querycap(struct file *file, void  *priv,
 375                            struct v4l2_capability *cap)
 376 {
 377         struct sh_vou_device *vou_dev = video_drvdata(file);
 378
 379         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 380
 381         strscpy(cap->card, "SuperH VOU", sizeof(cap->card));
 382         strscpy(cap->driver, "sh-vou", sizeof(cap->driver));
 383         strscpy(cap->bus_info, "platform:sh-vou", sizeof(cap->bus_info));
 384         cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE |
 385                            V4L2_CAP_STREAMING;
 386         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 387         return 0;
 388 }
 389
 390 /* Enumerate formats, that the device can accept from the user */
 391 static int sh_vou_enum_fmt_vid_out(struct file *file, void  *priv,
 392                                    struct v4l2_fmtdesc *fmt)
 393 {
 394         struct sh_vou_device *vou_dev = video_drvdata(file);
 395
 396         if (fmt->index >= ARRAY_SIZE(vou_fmt))
 397                 return -EINVAL;
 398
 399         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 400
 401         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 402         strscpy(fmt->description, vou_fmt[fmt->index].desc,
 403                 sizeof(fmt->description));
 404         fmt->pixelformat = vou_fmt[fmt->index].pfmt;
 405
 406         return 0;
 407 }
 408
 409 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
 410                                 struct v4l2_format *fmt)
 411 {
 412         struct sh_vou_device *vou_dev = video_drvdata(file);
 413
 414         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 415
 416         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 417         fmt->fmt.pix = vou_dev->pix;
 418
 419         return 0;
 420 }
 421
 422 static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
 423 static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
 424 static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
 425 static const unsigned char vou_scale_v_num[] = {1, 2, 4};
 426 static const unsigned char vou_scale_v_den[] = {1, 1, 1};
 427 static const unsigned char vou_scale_v_fld[] = {0, 1};
 428
 429 static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
 430                                       int pix_idx, int w_idx, int h_idx)
 431 {
 432         struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
 433         unsigned int black_left, black_top, width_max,
 434                 frame_in_height, frame_out_height, frame_out_top;
 435         struct v4l2_rect *rect = &vou_dev->rect;
 436         struct v4l2_pix_format *pix = &vou_dev->pix;
 437         u32 vouvcr = 0, dsr_h, dsr_v;
 438
 439         if (vou_dev->std & V4L2_STD_525_60) {
 440                 width_max = 858;
 441                 /* height_max = 262; */
 442         } else {
 443                 width_max = 864;
 444                 /* height_max = 312; */
 445         }
 446
 447         frame_in_height = pix->height / 2;
 448         frame_out_height = rect->height / 2;
 449         frame_out_top = rect->top / 2;
 450
 451         /*
 452          * Cropping scheme: max useful image is 720x480, and the total video
 453          * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
 454          * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
 455          * of which the first 33 / 25 clocks HSYNC must be held active. This
 456          * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
 457          * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
 458          * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
 459          * beyond DSR, specified on the left and top by the VPR register "black
 460          * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
 461          * at 138 / 144 : 20, because that's the HSYNC timing, that our first
 462          * client requires, and that's exactly what leaves us 720 pixels for the
 463          * image; we leave VPR[VVP] at default 20 for now, because the client
 464          * doesn't seem to have any special requirements for it. Otherwise we
 465          * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
 466          * the selected standard, and DPR and DSR are selected according to
 467          * cropping. Q: how does the client detect the first valid line? Does
 468          * HSYNC stay inactive during invalid (black) lines?
 469          */
 470         black_left = width_max - VOU_MAX_IMAGE_WIDTH;
 471         black_top = 20;
 472
 473         dsr_h = rect->width + rect->left;
 474         dsr_v = frame_out_height + frame_out_top;
 475
 476         dev_dbg(vou_dev->v4l2_dev.dev,
 477                 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
 478                 pix->width, frame_in_height, black_left, black_top,
 479                 rect->left, frame_out_top, dsr_h, dsr_v);
 480
 481         /* VOUISR height - half of a frame height in frame mode */
 482         sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
 483         sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
 484         sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
 485         sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
 486
 487         /*
 488          * if necessary, we could set VOUHIR to
 489          * max(black_left + dsr_h, width_max) here
 490          */
 491
 492         if (w_idx)
 493                 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
 494         if (h_idx)
 495                 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
 496
 497         dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr);
 498
 499         /* To produce a colour bar for testing set bit 23 of VOUVCR */
 500         sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
 501         sh_vou_reg_ab_write(vou_dev, VOUDFR,
 502                             fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
 503 }
 504
 505 struct sh_vou_geometry {
 506         struct v4l2_rect output;
 507         unsigned int in_width;
 508         unsigned int in_height;
 509         int scale_idx_h;
 510         int scale_idx_v;
 511 };
 512
 513 /*
 514  * Find input geometry, that we can use to produce output, closest to the
 515  * requested rectangle, using VOU scaling
 516  */
 517 static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
 518 {
 519         /* The compiler cannot know, that best and idx will indeed be set */
 520         unsigned int best_err = UINT_MAX, best = 0, img_height_max;
 521         int i, idx = 0;
 522
 523         if (std & V4L2_STD_525_60)
 524                 img_height_max = 480;
 525         else
 526                 img_height_max = 576;
 527
 528         /* Image width must be a multiple of 4 */
 529         v4l_bound_align_image(&geo->in_width,
 530                               VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
 531                               &geo->in_height,
 532                               VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
 533
 534         /* Select scales to come as close as possible to the output image */
 535         for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
 536                 unsigned int err;
 537                 unsigned int found = geo->output.width * vou_scale_h_den[i] /
 538                         vou_scale_h_num[i];
 539
 540                 if (found > VOU_MAX_IMAGE_WIDTH)
 541                         /* scales increase */
 542                         break;
 543
 544                 err = abs(found - geo->in_width);
 545                 if (err < best_err) {
 546                         best_err = err;
 547                         idx = i;
 548                         best = found;
 549                 }
 550                 if (!err)
 551                         break;
 552         }
 553
 554         geo->in_width = best;
 555         geo->scale_idx_h = idx;
 556
 557         best_err = UINT_MAX;
 558
 559         /* This loop can be replaced with one division */
 560         for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
 561                 unsigned int err;
 562                 unsigned int found = geo->output.height * vou_scale_v_den[i] /
 563                         vou_scale_v_num[i];
 564
 565                 if (found > img_height_max)
 566                         /* scales increase */
 567                         break;
 568
 569                 err = abs(found - geo->in_height);
 570                 if (err < best_err) {
 571                         best_err = err;
 572                         idx = i;
 573                         best = found;
 574                 }
 575                 if (!err)
 576                         break;
 577         }
 578
 579         geo->in_height = best;
 580         geo->scale_idx_v = idx;
 581 }
 582
 583 /*
 584  * Find output geometry, that we can produce, using VOU scaling, closest to
 585  * the requested rectangle
 586  */
 587 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
 588 {
 589         unsigned int best_err = UINT_MAX, best = geo->in_width,
 590                 width_max, height_max, img_height_max;
 591         int i, idx_h = 0, idx_v = 0;
 592
 593         if (std & V4L2_STD_525_60) {
 594                 width_max = 858;
 595                 height_max = 262 * 2;
 596                 img_height_max = 480;
 597         } else {
 598                 width_max = 864;
 599                 height_max = 312 * 2;
 600                 img_height_max = 576;
 601         }
 602
 603         /* Select scales to come as close as possible to the output image */
 604         for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
 605                 unsigned int err;
 606                 unsigned int found = geo->in_width * vou_scale_h_num[i] /
 607                         vou_scale_h_den[i];
 608
 609                 if (found > VOU_MAX_IMAGE_WIDTH)
 610                         /* scales increase */
 611                         break;
 612
 613                 err = abs(found - geo->output.width);
 614                 if (err < best_err) {
 615                         best_err = err;
 616                         idx_h = i;
 617                         best = found;
 618                 }
 619                 if (!err)
 620                         break;
 621         }
 622
 623         geo->output.width = best;
 624         geo->scale_idx_h = idx_h;
 625         if (geo->output.left + best > width_max)
 626                 geo->output.left = width_max - best;
 627
 628         pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
 629                  vou_scale_h_num[idx_h], vou_scale_h_den[idx_h], best);
 630
 631         best_err = UINT_MAX;
 632
 633         /* This loop can be replaced with one division */
 634         for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
 635                 unsigned int err;
 636                 unsigned int found = geo->in_height * vou_scale_v_num[i] /
 637                         vou_scale_v_den[i];
 638
 639                 if (found > img_height_max)
 640                         /* scales increase */
 641                         break;
 642
 643                 err = abs(found - geo->output.height);
 644                 if (err < best_err) {
 645                         best_err = err;
 646                         idx_v = i;
 647                         best = found;
 648                 }
 649                 if (!err)
 650                         break;
 651         }
 652
 653         geo->output.height = best;
 654         geo->scale_idx_v = idx_v;
 655         if (geo->output.top + best > height_max)
 656                 geo->output.top = height_max - best;
 657
 658         pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
 659                  vou_scale_v_num[idx_v], vou_scale_v_den[idx_v], best);
 660 }
 661
 662 static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
 663                                   struct v4l2_format *fmt)
 664 {
 665         struct sh_vou_device *vou_dev = video_drvdata(file);
 666         struct v4l2_pix_format *pix = &fmt->fmt.pix;
 667         unsigned int img_height_max;
 668         int pix_idx;
 669
 670         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 671
 672         pix->field = V4L2_FIELD_INTERLACED;
 673         pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
 674         pix->ycbcr_enc = pix->quantization = 0;
 675
 676         for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
 677                 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
 678                         break;
 679
 680         if (pix_idx == ARRAY_SIZE(vou_fmt))
 681                 return -EINVAL;
 682
 683         if (vou_dev->std & V4L2_STD_525_60)
 684                 img_height_max = 480;
 685         else
 686                 img_height_max = 576;
 687
 688         v4l_bound_align_image(&pix->width,
 689                               VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
 690                               &pix->height,
 691                               VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
 692         pix->bytesperline = pix->width * vou_fmt[pix_idx].bpl;
 693         pix->sizeimage = pix->height * ((pix->width * vou_fmt[pix_idx].bpp) >> 3);
 694
 695         return 0;
 696 }
 697
 698 static int sh_vou_set_fmt_vid_out(struct sh_vou_device *vou_dev,
 699                                 struct v4l2_pix_format *pix)
 700 {
 701         unsigned int img_height_max;
 702         struct sh_vou_geometry geo;
 703         struct v4l2_subdev_format format = {
 704                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 705                 /* Revisit: is this the correct code? */
 706                 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
 707                 .format.field = V4L2_FIELD_INTERLACED,
 708                 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
 709         };
 710         struct v4l2_mbus_framefmt *mbfmt = &format.format;
 711         int pix_idx;
 712         int ret;
 713
 714         if (vb2_is_busy(&vou_dev->queue))
 715                 return -EBUSY;
 716
 717         for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
 718                 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
 719                         break;
 720
 721         geo.in_width = pix->width;
 722         geo.in_height = pix->height;
 723         geo.output = vou_dev->rect;
 724
 725         vou_adjust_output(&geo, vou_dev->std);
 726
 727         mbfmt->width = geo.output.width;
 728         mbfmt->height = geo.output.height;
 729         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
 730                                          set_fmt, NULL, &format);
 731         /* Must be implemented, so, don't check for -ENOIOCTLCMD */
 732         if (ret < 0)
 733                 return ret;
 734
 735         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
 736                 geo.output.width, geo.output.height, mbfmt->width, mbfmt->height);
 737
 738         if (vou_dev->std & V4L2_STD_525_60)
 739                 img_height_max = 480;
 740         else
 741                 img_height_max = 576;
 742
 743         /* Sanity checks */
 744         if ((unsigned)mbfmt->width > VOU_MAX_IMAGE_WIDTH ||
 745             (unsigned)mbfmt->height > img_height_max ||
 746             mbfmt->code != MEDIA_BUS_FMT_YUYV8_2X8)
 747                 return -EIO;
 748
 749         if (mbfmt->width != geo.output.width ||
 750             mbfmt->height != geo.output.height) {
 751                 geo.output.width = mbfmt->width;
 752                 geo.output.height = mbfmt->height;
 753
 754                 vou_adjust_input(&geo, vou_dev->std);
 755         }
 756
 757         /* We tried to preserve output rectangle, but it could have changed */
 758         vou_dev->rect = geo.output;
 759         pix->width = geo.in_width;
 760         pix->height = geo.in_height;
 761
 762         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
 763                 pix->width, pix->height);
 764
 765         vou_dev->pix_idx = pix_idx;
 766
 767         vou_dev->pix = *pix;
 768
 769         sh_vou_configure_geometry(vou_dev, pix_idx,
 770                                   geo.scale_idx_h, geo.scale_idx_v);
 771
 772         return 0;
 773 }
 774
 775 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
 776                                 struct v4l2_format *fmt)
 777 {
 778         struct sh_vou_device *vou_dev = video_drvdata(file);
 779         int ret = sh_vou_try_fmt_vid_out(file, priv, fmt);
 780
 781         if (ret)
 782                 return ret;
 783         return sh_vou_set_fmt_vid_out(vou_dev, &fmt->fmt.pix);
 784 }
 785
 786 static int sh_vou_enum_output(struct file *file, void *fh,
 787                               struct v4l2_output *a)
 788 {
 789         struct sh_vou_device *vou_dev = video_drvdata(file);
 790
 791         if (a->index)
 792                 return -EINVAL;
 793         strscpy(a->name, "Video Out", sizeof(a->name));
 794         a->type = V4L2_OUTPUT_TYPE_ANALOG;
 795         a->std = vou_dev->vdev.tvnorms;
 796         return 0;
 797 }
 798
 799 static int sh_vou_g_output(struct file *file, void *fh, unsigned int *i)
 800 {
 801         *i = 0;
 802         return 0;
 803 }
 804
 805 static int sh_vou_s_output(struct file *file, void *fh, unsigned int i)
 806 {
 807         return i ? -EINVAL : 0;
 808 }
 809
 810 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
 811 {
 812         switch (bus_fmt) {
 813         default:
 814                 pr_warn("%s(): Invalid bus-format code %d, using default 8-bit\n",
 815                         __func__, bus_fmt);
 816                 /* fall through */
 817         case SH_VOU_BUS_8BIT:
 818                 return 1;
 819         case SH_VOU_BUS_16BIT:
 820                 return 0;
 821         case SH_VOU_BUS_BT656:
 822                 return 3;
 823         }
 824 }
 825
 826 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id std_id)
 827 {
 828         struct sh_vou_device *vou_dev = video_drvdata(file);
 829         int ret;
 830
 831         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, std_id);
 832
 833         if (std_id == vou_dev->std)
 834                 return 0;
 835
 836         if (vb2_is_busy(&vou_dev->queue))
 837                 return -EBUSY;
 838
 839         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
 840                                          s_std_output, std_id);
 841         /* Shall we continue, if the subdev doesn't support .s_std_output()? */
 842         if (ret < 0 && ret != -ENOIOCTLCMD)
 843                 return ret;
 844
 845         vou_dev->rect.top = vou_dev->rect.left = 0;
 846         vou_dev->rect.width = VOU_MAX_IMAGE_WIDTH;
 847         if (std_id & V4L2_STD_525_60) {
 848                 sh_vou_reg_ab_set(vou_dev, VOUCR,
 849                         sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
 850                 vou_dev->rect.height = 480;
 851         } else {
 852                 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
 853                 vou_dev->rect.height = 576;
 854         }
 855
 856         vou_dev->pix.width = vou_dev->rect.width;
 857         vou_dev->pix.height = vou_dev->rect.height;
 858         vou_dev->pix.bytesperline =
 859                 vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpl;
 860         vou_dev->pix.sizeimage = vou_dev->pix.height *
 861                 ((vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpp) >> 3);
 862         vou_dev->std = std_id;
 863         sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
 864
 865         return 0;
 866 }
 867
 868 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
 869 {
 870         struct sh_vou_device *vou_dev = video_drvdata(file);
 871
 872         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 873
 874         *std = vou_dev->std;
 875
 876         return 0;
 877 }
 878
 879 static int sh_vou_log_status(struct file *file, void *priv)
 880 {
 881         struct sh_vou_device *vou_dev = video_drvdata(file);
 882
 883         pr_info("VOUER:   0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUER));
 884         pr_info("VOUCR:   0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUCR));
 885         pr_info("VOUSTR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSTR));
 886         pr_info("VOUVCR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVCR));
 887         pr_info("VOUISR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUISR));
 888         pr_info("VOUBCR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUBCR));
 889         pr_info("VOUDPR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDPR));
 890         pr_info("VOUDSR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDSR));
 891         pr_info("VOUVPR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVPR));
 892         pr_info("VOUIR:   0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUIR));
 893         pr_info("VOUSRR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSRR));
 894         pr_info("VOUMSR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUMSR));
 895         pr_info("VOUHIR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUHIR));
 896         pr_info("VOUDFR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDFR));
 897         pr_info("VOUAD1R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD1R));
 898         pr_info("VOUAD2R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD2R));
 899         pr_info("VOUAIR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAIR));
 900         pr_info("VOUSWR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSWR));
 901         pr_info("VOURCR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURCR));
 902         pr_info("VOURPR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURPR));
 903         return 0;
 904 }
 905
 906 static int sh_vou_g_selection(struct file *file, void *fh,
 907                               struct v4l2_selection *sel)
 908 {
 909         struct sh_vou_device *vou_dev = video_drvdata(file);
 910
 911         if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 912                 return -EINVAL;
 913         switch (sel->target) {
 914         case V4L2_SEL_TGT_COMPOSE:
 915                 sel->r = vou_dev->rect;
 916                 break;
 917         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 918         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 919                 sel->r.left = 0;
 920                 sel->r.top = 0;
 921                 sel->r.width = VOU_MAX_IMAGE_WIDTH;
 922                 if (vou_dev->std & V4L2_STD_525_60)
 923                         sel->r.height = 480;
 924                 else
 925                         sel->r.height = 576;
 926                 break;
 927         default:
 928                 return -EINVAL;
 929         }
 930         return 0;
 931 }
 932
 933 /* Assume a dull encoder, do all the work ourselves. */
 934 static int sh_vou_s_selection(struct file *file, void *fh,
 935                               struct v4l2_selection *sel)
 936 {
 937         struct v4l2_rect *rect = &sel->r;
 938         struct sh_vou_device *vou_dev = video_drvdata(file);
 939         struct v4l2_subdev_selection sd_sel = {
 940                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 941                 .target = V4L2_SEL_TGT_COMPOSE,
 942         };
 943         struct v4l2_pix_format *pix = &vou_dev->pix;
 944         struct sh_vou_geometry geo;
 945         struct v4l2_subdev_format format = {
 946                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 947                 /* Revisit: is this the correct code? */
 948                 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
 949                 .format.field = V4L2_FIELD_INTERLACED,
 950                 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
 951         };
 952         unsigned int img_height_max;
 953         int ret;
 954
 955         if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 956             sel->target != V4L2_SEL_TGT_COMPOSE)
 957                 return -EINVAL;
 958
 959         if (vb2_is_busy(&vou_dev->queue))
 960                 return -EBUSY;
 961
 962         if (vou_dev->std & V4L2_STD_525_60)
 963                 img_height_max = 480;
 964         else
 965                 img_height_max = 576;
 966
 967         v4l_bound_align_image(&rect->width,
 968                               VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 1,
 969                               &rect->height,
 970                               VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
 971
 972         if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
 973                 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
 974
 975         if (rect->height + rect->top > img_height_max)
 976                 rect->top = img_height_max - rect->height;
 977
 978         geo.output = *rect;
 979         geo.in_width = pix->width;
 980         geo.in_height = pix->height;
 981
 982         /* Configure the encoder one-to-one, position at 0, ignore errors */
 983         sd_sel.r.width = geo.output.width;
 984         sd_sel.r.height = geo.output.height;
 985         /*
 986          * We first issue a S_SELECTION, so that the subsequent S_FMT delivers the
 987          * final encoder configuration.
 988          */
 989         v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
 990                                    set_selection, NULL, &sd_sel);
 991         format.format.width = geo.output.width;
 992         format.format.height = geo.output.height;
 993         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
 994                                          set_fmt, NULL, &format);
 995         /* Must be implemented, so, don't check for -ENOIOCTLCMD */
 996         if (ret < 0)
 997                 return ret;
 998
 999         /* Sanity checks */
1000         if ((unsigned)format.format.width > VOU_MAX_IMAGE_WIDTH ||
1001             (unsigned)format.format.height > img_height_max ||
1002             format.format.code != MEDIA_BUS_FMT_YUYV8_2X8)
1003                 return -EIO;
1004
1005         geo.output.width = format.format.width;
1006         geo.output.height = format.format.height;
1007
1008         /*
1009          * No down-scaling. According to the API, current call has precedence:
1010          * https://linuxtv.org/downloads/v4l-dvb-apis/uapi/v4l/crop.html#cropping-structures
1011          */
1012         vou_adjust_input(&geo, vou_dev->std);
1013
1014         /* We tried to preserve output rectangle, but it could have changed */
1015         vou_dev->rect = geo.output;
1016         pix->width = geo.in_width;
1017         pix->height = geo.in_height;
1018
1019         sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1020                                   geo.scale_idx_h, geo.scale_idx_v);
1021
1022         return 0;
1023 }
1024
1025 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1026 {
1027         struct sh_vou_device *vou_dev = dev_id;
1028         static unsigned long j;
1029         struct sh_vou_buffer *vb;
1030         static int cnt;
1031         u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1032         u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1033
1034         if (!(irq_status & 0x300)) {
1035                 if (printk_timed_ratelimit(&j, 500))
1036                         dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1037                                  irq_status);
1038                 return IRQ_NONE;
1039         }
1040
1041         spin_lock(&vou_dev->lock);
1042         if (!vou_dev->active || list_empty(&vou_dev->buf_list)) {
1043                 if (printk_timed_ratelimit(&j, 500))
1044                         dev_warn(vou_dev->v4l2_dev.dev,
1045                                  "IRQ without active buffer: %x!\n", irq_status);
1046                 /* Just ack: buf_release will disable further interrupts */
1047                 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1048                 spin_unlock(&vou_dev->lock);
1049                 return IRQ_HANDLED;
1050         }
1051
1052         masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1053         dev_dbg(vou_dev->v4l2_dev.dev,
1054                 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1055                 irq_status, masked, vou_status, cnt);
1056
1057         cnt++;
1058         /* side = vou_status & 0x10000; */
1059
1060         /* Clear only set interrupts */
1061         sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1062
1063         vb = vou_dev->active;
1064         if (list_is_singular(&vb->list)) {
1065                 /* Keep cycling while no next buffer is available */
1066                 sh_vou_schedule_next(vou_dev, &vb->vb);
1067                 spin_unlock(&vou_dev->lock);
1068                 return IRQ_HANDLED;
1069         }
1070
1071         list_del(&vb->list);
1072
1073         vb->vb.vb2_buf.timestamp = ktime_get_ns();
1074         vb->vb.sequence = vou_dev->sequence++;
1075         vb->vb.field = V4L2_FIELD_INTERLACED;
1076         vb2_buffer_done(&vb->vb.vb2_buf, VB2_BUF_STATE_DONE);
1077
1078         vou_dev->active = list_entry(vou_dev->buf_list.next,
1079                                      struct sh_vou_buffer, list);
1080
1081         if (list_is_singular(&vou_dev->buf_list)) {
1082                 /* Keep cycling while no next buffer is available */
1083                 sh_vou_schedule_next(vou_dev, &vou_dev->active->vb);
1084         } else {
1085                 struct sh_vou_buffer *new = list_entry(vou_dev->active->list.next,
1086                                                 struct sh_vou_buffer, list);
1087                 sh_vou_schedule_next(vou_dev, &new->vb);
1088         }
1089
1090         spin_unlock(&vou_dev->lock);
1091
1092         return IRQ_HANDLED;
1093 }
1094
1095 static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1096 {
1097         struct sh_vou_pdata *pdata = vou_dev->pdata;
1098         u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1099         int i = 100;
1100
1101         /* Disable all IRQs */
1102         sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1103
1104         /* Reset VOU interfaces - registers unaffected */
1105         sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1106         while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1107                 udelay(1);
1108
1109         if (!i)
1110                 return -ETIMEDOUT;
1111
1112         dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1113
1114         if (pdata->flags & SH_VOU_PCLK_FALLING)
1115                 voucr |= 1 << 28;
1116         if (pdata->flags & SH_VOU_HSYNC_LOW)
1117                 voucr |= 1 << 27;
1118         if (pdata->flags & SH_VOU_VSYNC_LOW)
1119                 voucr |= 1 << 26;
1120         sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1121
1122         /* Manual register side switching at first */
1123         sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1124         /* Default - fixed HSYNC length, can be made configurable is required */
1125         sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1126
1127         sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
1128
1129         return 0;
1130 }
1131
1132 /* File operations */
1133 static int sh_vou_open(struct file *file)
1134 {
1135         struct sh_vou_device *vou_dev = video_drvdata(file);
1136         int err;
1137
1138         if (mutex_lock_interruptible(&vou_dev->fop_lock))
1139                 return -ERESTARTSYS;
1140
1141         err = v4l2_fh_open(file);
1142         if (err)
1143                 goto done_open;
1144         if (v4l2_fh_is_singular_file(file) &&
1145             vou_dev->status == SH_VOU_INITIALISING) {
1146                 /* First open */
1147                 pm_runtime_get_sync(vou_dev->v4l2_dev.dev);
1148                 err = sh_vou_hw_init(vou_dev);
1149                 if (err < 0) {
1150                         pm_runtime_put(vou_dev->v4l2_dev.dev);
1151                         v4l2_fh_release(file);
1152                 } else {
1153                         vou_dev->status = SH_VOU_IDLE;
1154                 }
1155         }
1156 done_open:
1157         mutex_unlock(&vou_dev->fop_lock);
1158         return err;
1159 }
1160
1161 static int sh_vou_release(struct file *file)
1162 {
1163         struct sh_vou_device *vou_dev = video_drvdata(file);
1164         bool is_last;
1165
1166         mutex_lock(&vou_dev->fop_lock);
1167         is_last = v4l2_fh_is_singular_file(file);
1168         _vb2_fop_release(file, NULL);
1169         if (is_last) {
1170                 /* Last close */
1171                 vou_dev->status = SH_VOU_INITIALISING;
1172                 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1173                 pm_runtime_put(vou_dev->v4l2_dev.dev);
1174         }
1175         mutex_unlock(&vou_dev->fop_lock);
1176         return 0;
1177 }
1178
1179 /* sh_vou display ioctl operations */
1180 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1181         .vidioc_querycap                = sh_vou_querycap,
1182         .vidioc_enum_fmt_vid_out        = sh_vou_enum_fmt_vid_out,
1183         .vidioc_g_fmt_vid_out           = sh_vou_g_fmt_vid_out,
1184         .vidioc_s_fmt_vid_out           = sh_vou_s_fmt_vid_out,
1185         .vidioc_try_fmt_vid_out         = sh_vou_try_fmt_vid_out,
1186         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1187         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1188         .vidioc_querybuf                = vb2_ioctl_querybuf,
1189         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1190         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1191         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
1192         .vidioc_streamon                = vb2_ioctl_streamon,
1193         .vidioc_streamoff               = vb2_ioctl_streamoff,
1194         .vidioc_expbuf                  = vb2_ioctl_expbuf,
1195         .vidioc_g_output                = sh_vou_g_output,
1196         .vidioc_s_output                = sh_vou_s_output,
1197         .vidioc_enum_output             = sh_vou_enum_output,
1198         .vidioc_s_std                   = sh_vou_s_std,
1199         .vidioc_g_std                   = sh_vou_g_std,
1200         .vidioc_g_selection             = sh_vou_g_selection,
1201         .vidioc_s_selection             = sh_vou_s_selection,
1202         .vidioc_log_status              = sh_vou_log_status,
1203 };
1204
1205 static const struct v4l2_file_operations sh_vou_fops = {
1206         .owner          = THIS_MODULE,
1207         .open           = sh_vou_open,
1208         .release        = sh_vou_release,
1209         .unlocked_ioctl = video_ioctl2,
1210         .mmap           = vb2_fop_mmap,
1211         .poll           = vb2_fop_poll,
1212         .write          = vb2_fop_write,
1213 };
1214
1215 static const struct video_device sh_vou_video_template = {
1216         .name           = "sh_vou",
1217         .fops           = &sh_vou_fops,
1218         .ioctl_ops      = &sh_vou_ioctl_ops,
1219         .tvnorms        = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1220         .vfl_dir        = VFL_DIR_TX,
1221 };
1222
1223 static int sh_vou_probe(struct platform_device *pdev)
1224 {
1225         struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1226         struct v4l2_rect *rect;
1227         struct v4l2_pix_format *pix;
1228         struct i2c_adapter *i2c_adap;
1229         struct video_device *vdev;
1230         struct sh_vou_device *vou_dev;
1231         struct resource *reg_res;
1232         struct v4l2_subdev *subdev;
1233         struct vb2_queue *q;
1234         int irq, ret;
1235
1236         reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1237         irq = platform_get_irq(pdev, 0);
1238
1239         if (!vou_pdata || !reg_res || irq <= 0) {
1240                 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1241                 return -ENODEV;
1242         }
1243
1244         vou_dev = devm_kzalloc(&pdev->dev, sizeof(*vou_dev), GFP_KERNEL);
1245         if (!vou_dev)
1246                 return -ENOMEM;
1247
1248         INIT_LIST_HEAD(&vou_dev->buf_list);
1249         spin_lock_init(&vou_dev->lock);
1250         mutex_init(&vou_dev->fop_lock);
1251         vou_dev->pdata = vou_pdata;
1252         vou_dev->status = SH_VOU_INITIALISING;
1253         vou_dev->pix_idx = 1;
1254
1255         rect = &vou_dev->rect;
1256         pix = &vou_dev->pix;
1257
1258         /* Fill in defaults */
1259         vou_dev->std            = V4L2_STD_NTSC_M;
1260         rect->left              = 0;
1261         rect->top               = 0;
1262         rect->width             = VOU_MAX_IMAGE_WIDTH;
1263         rect->height            = 480;
1264         pix->width              = VOU_MAX_IMAGE_WIDTH;
1265         pix->height             = 480;
1266         pix->pixelformat        = V4L2_PIX_FMT_NV16;
1267         pix->field              = V4L2_FIELD_INTERLACED;
1268         pix->bytesperline       = VOU_MAX_IMAGE_WIDTH;
1269         pix->sizeimage          = VOU_MAX_IMAGE_WIDTH * 2 * 480;
1270         pix->colorspace         = V4L2_COLORSPACE_SMPTE170M;
1271
1272         vou_dev->base = devm_ioremap_resource(&pdev->dev, reg_res);
1273         if (IS_ERR(vou_dev->base))
1274                 return PTR_ERR(vou_dev->base);
1275
1276         ret = devm_request_irq(&pdev->dev, irq, sh_vou_isr, 0, "vou", vou_dev);
1277         if (ret < 0)
1278                 return ret;
1279
1280         ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1281         if (ret < 0) {
1282                 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1283                 return ret;
1284         }
1285
1286         vdev = &vou_dev->vdev;
1287         *vdev = sh_vou_video_template;
1288         if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1289                 vdev->tvnorms |= V4L2_STD_PAL;
1290         vdev->v4l2_dev = &vou_dev->v4l2_dev;
1291         vdev->release = video_device_release_empty;
1292         vdev->lock = &vou_dev->fop_lock;
1293
1294         video_set_drvdata(vdev, vou_dev);
1295
1296         /* Initialize the vb2 queue */
1297         q = &vou_dev->queue;
1298         q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1299         q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_WRITE;
1300         q->drv_priv = vou_dev;
1301         q->buf_struct_size = sizeof(struct sh_vou_buffer);
1302         q->ops = &sh_vou_qops;
1303         q->mem_ops = &vb2_dma_contig_memops;
1304         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1305         q->min_buffers_needed = 2;
1306         q->lock = &vou_dev->fop_lock;
1307         q->dev = &pdev->dev;
1308         ret = vb2_queue_init(q);
1309         if (ret)
1310                 goto ei2cgadap;
1311
1312         vdev->queue = q;
1313         INIT_LIST_HEAD(&vou_dev->buf_list);
1314
1315         pm_runtime_enable(&pdev->dev);
1316         pm_runtime_resume(&pdev->dev);
1317
1318         i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1319         if (!i2c_adap) {
1320                 ret = -ENODEV;
1321                 goto ei2cgadap;
1322         }
1323
1324         ret = sh_vou_hw_init(vou_dev);
1325         if (ret < 0)
1326                 goto ereset;
1327
1328         subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1329                         vou_pdata->board_info, NULL);
1330         if (!subdev) {
1331                 ret = -ENOMEM;
1332                 goto ei2cnd;
1333         }
1334
1335         ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1336         if (ret < 0)
1337                 goto evregdev;
1338
1339         return 0;
1340
1341 evregdev:
1342 ei2cnd:
1343 ereset:
1344         i2c_put_adapter(i2c_adap);
1345 ei2cgadap:
1346         pm_runtime_disable(&pdev->dev);
1347         v4l2_device_unregister(&vou_dev->v4l2_dev);
1348         return ret;
1349 }
1350
1351 static int sh_vou_remove(struct platform_device *pdev)
1352 {
1353         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1354         struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1355                                                 struct sh_vou_device, v4l2_dev);
1356         struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1357                                             struct v4l2_subdev, list);
1358         struct i2c_client *client = v4l2_get_subdevdata(sd);
1359
1360         pm_runtime_disable(&pdev->dev);
1361         video_unregister_device(&vou_dev->vdev);
1362         i2c_put_adapter(client->adapter);
1363         v4l2_device_unregister(&vou_dev->v4l2_dev);
1364         return 0;
1365 }
1366
1367 static struct platform_driver __refdata sh_vou = {
1368         .remove  = sh_vou_remove,
1369         .driver  = {
1370                 .name   = "sh-vou",
1371         },
1372 };
1373
1374 module_platform_driver_probe(sh_vou, sh_vou_probe);
1375
1376 MODULE_DESCRIPTION("SuperH VOU driver");
1377 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1378 MODULE_LICENSE("GPL v2");
1379 MODULE_VERSION("0.1.0");
1380 MODULE_ALIAS("platform:sh-vou");