drivers/media/platform/vivid/vivid-kthread-cap.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * vivid-kthread-cap.h - video/vbi capture thread support functions.
   4  *
   5  * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/errno.h>
  10 #include <linux/kernel.h>
  11 #include <linux/init.h>
  12 #include <linux/sched.h>
  13 #include <linux/slab.h>
  14 #include <linux/font.h>
  15 #include <linux/mutex.h>
  16 #include <linux/videodev2.h>
  17 #include <linux/kthread.h>
  18 #include <linux/freezer.h>
  19 #include <linux/random.h>
  20 #include <linux/v4l2-dv-timings.h>
  21 #include <asm/div64.h>
  22 #include <media/videobuf2-vmalloc.h>
  23 #include <media/v4l2-dv-timings.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-fh.h>
  26 #include <media/v4l2-event.h>
  27 #include <media/v4l2-rect.h>
  28
  29 #include "vivid-core.h"
  30 #include "vivid-vid-common.h"
  31 #include "vivid-vid-cap.h"
  32 #include "vivid-vid-out.h"
  33 #include "vivid-radio-common.h"
  34 #include "vivid-radio-rx.h"
  35 #include "vivid-radio-tx.h"
  36 #include "vivid-sdr-cap.h"
  37 #include "vivid-vbi-cap.h"
  38 #include "vivid-vbi-out.h"
  39 #include "vivid-osd.h"
  40 #include "vivid-ctrls.h"
  41 #include "vivid-kthread-cap.h"
  42
  43 static inline v4l2_std_id vivid_get_std_cap(const struct vivid_dev *dev)
  44 {
  45         if (vivid_is_sdtv_cap(dev))
  46                 return dev->std_cap;
  47         return 0;
  48 }
  49
  50 static void copy_pix(struct vivid_dev *dev, int win_y, int win_x,
  51                         u16 *cap, const u16 *osd)
  52 {
  53         u16 out;
  54         int left = dev->overlay_out_left;
  55         int top = dev->overlay_out_top;
  56         int fb_x = win_x + left;
  57         int fb_y = win_y + top;
  58         int i;
  59
  60         out = *cap;
  61         *cap = *osd;
  62         if (dev->bitmap_out) {
  63                 const u8 *p = dev->bitmap_out;
  64                 unsigned stride = (dev->compose_out.width + 7) / 8;
  65
  66                 win_x -= dev->compose_out.left;
  67                 win_y -= dev->compose_out.top;
  68                 if (!(p[stride * win_y + win_x / 8] & (1 << (win_x & 7))))
  69                         return;
  70         }
  71
  72         for (i = 0; i < dev->clipcount_out; i++) {
  73                 struct v4l2_rect *r = &dev->clips_out[i].c;
  74
  75                 if (fb_y >= r->top && fb_y < r->top + r->height &&
  76                     fb_x >= r->left && fb_x < r->left + r->width)
  77                         return;
  78         }
  79         if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_CHROMAKEY) &&
  80             *osd != dev->chromakey_out)
  81                 return;
  82         if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_SRC_CHROMAKEY) &&
  83             out == dev->chromakey_out)
  84                 return;
  85         if (dev->fmt_cap->alpha_mask) {
  86                 if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_GLOBAL_ALPHA) &&
  87                     dev->global_alpha_out)
  88                         return;
  89                 if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_LOCAL_ALPHA) &&
  90                     *cap & dev->fmt_cap->alpha_mask)
  91                         return;
  92                 if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_LOCAL_INV_ALPHA) &&
  93                     !(*cap & dev->fmt_cap->alpha_mask))
  94                         return;
  95         }
  96         *cap = out;
  97 }
  98
  99 static void blend_line(struct vivid_dev *dev, unsigned y_offset, unsigned x_offset,
 100                 u8 *vcapbuf, const u8 *vosdbuf,
 101                 unsigned width, unsigned pixsize)
 102 {
 103         unsigned x;
 104
 105         for (x = 0; x < width; x++, vcapbuf += pixsize, vosdbuf += pixsize) {
 106                 copy_pix(dev, y_offset, x_offset + x,
 107                          (u16 *)vcapbuf, (const u16 *)vosdbuf);
 108         }
 109 }
 110
 111 static void scale_line(const u8 *src, u8 *dst, unsigned srcw, unsigned dstw, unsigned twopixsize)
 112 {
 113         /* Coarse scaling with Bresenham */
 114         unsigned int_part;
 115         unsigned fract_part;
 116         unsigned src_x = 0;
 117         unsigned error = 0;
 118         unsigned x;
 119
 120         /*
 121          * We always combine two pixels to prevent color bleed in the packed
 122          * yuv case.
 123          */
 124         srcw /= 2;
 125         dstw /= 2;
 126         int_part = srcw / dstw;
 127         fract_part = srcw % dstw;
 128         for (x = 0; x < dstw; x++, dst += twopixsize) {
 129                 memcpy(dst, src + src_x * twopixsize, twopixsize);
 130                 src_x += int_part;
 131                 error += fract_part;
 132                 if (error >= dstw) {
 133                         error -= dstw;
 134                         src_x++;
 135                 }
 136         }
 137 }
 138
 139 /*
 140  * Precalculate the rectangles needed to perform video looping:
 141  *
 142  * The nominal pipeline is that the video output buffer is cropped by
 143  * crop_out, scaled to compose_out, overlaid with the output overlay,
 144  * cropped on the capture side by crop_cap and scaled again to the video
 145  * capture buffer using compose_cap.
 146  *
 147  * To keep things efficient we calculate the intersection of compose_out
 148  * and crop_cap (since that's the only part of the video that will
 149  * actually end up in the capture buffer), determine which part of the
 150  * video output buffer that is and which part of the video capture buffer
 151  * so we can scale the video straight from the output buffer to the capture
 152  * buffer without any intermediate steps.
 153  *
 154  * If we need to deal with an output overlay, then there is no choice and
 155  * that intermediate step still has to be taken. For the output overlay
 156  * support we calculate the intersection of the framebuffer and the overlay
 157  * window (which may be partially or wholly outside of the framebuffer
 158  * itself) and the intersection of that with loop_vid_copy (i.e. the part of
 159  * the actual looped video that will be overlaid). The result is calculated
 160  * both in framebuffer coordinates (loop_fb_copy) and compose_out coordinates
 161  * (loop_vid_overlay). Finally calculate the part of the capture buffer that
 162  * will receive that overlaid video.
 163  */
 164 static void vivid_precalc_copy_rects(struct vivid_dev *dev)
 165 {
 166         /* Framebuffer rectangle */
 167         struct v4l2_rect r_fb = {
 168                 0, 0, dev->display_width, dev->display_height
 169         };
 170         /* Overlay window rectangle in framebuffer coordinates */
 171         struct v4l2_rect r_overlay = {
 172                 dev->overlay_out_left, dev->overlay_out_top,
 173                 dev->compose_out.width, dev->compose_out.height
 174         };
 175
 176         v4l2_rect_intersect(&dev->loop_vid_copy, &dev->crop_cap, &dev->compose_out);
 177
 178         dev->loop_vid_out = dev->loop_vid_copy;
 179         v4l2_rect_scale(&dev->loop_vid_out, &dev->compose_out, &dev->crop_out);
 180         dev->loop_vid_out.left += dev->crop_out.left;
 181         dev->loop_vid_out.top += dev->crop_out.top;
 182
 183         dev->loop_vid_cap = dev->loop_vid_copy;
 184         v4l2_rect_scale(&dev->loop_vid_cap, &dev->crop_cap, &dev->compose_cap);
 185
 186         dprintk(dev, 1,
 187                 "loop_vid_copy: %dx%d@%dx%d loop_vid_out: %dx%d@%dx%d loop_vid_cap: %dx%d@%dx%d\n",
 188                 dev->loop_vid_copy.width, dev->loop_vid_copy.height,
 189                 dev->loop_vid_copy.left, dev->loop_vid_copy.top,
 190                 dev->loop_vid_out.width, dev->loop_vid_out.height,
 191                 dev->loop_vid_out.left, dev->loop_vid_out.top,
 192                 dev->loop_vid_cap.width, dev->loop_vid_cap.height,
 193                 dev->loop_vid_cap.left, dev->loop_vid_cap.top);
 194
 195         v4l2_rect_intersect(&r_overlay, &r_fb, &r_overlay);
 196
 197         /* shift r_overlay to the same origin as compose_out */
 198         r_overlay.left += dev->compose_out.left - dev->overlay_out_left;
 199         r_overlay.top += dev->compose_out.top - dev->overlay_out_top;
 200
 201         v4l2_rect_intersect(&dev->loop_vid_overlay, &r_overlay, &dev->loop_vid_copy);
 202         dev->loop_fb_copy = dev->loop_vid_overlay;
 203
 204         /* shift dev->loop_fb_copy back again to the fb origin */
 205         dev->loop_fb_copy.left -= dev->compose_out.left - dev->overlay_out_left;
 206         dev->loop_fb_copy.top -= dev->compose_out.top - dev->overlay_out_top;
 207
 208         dev->loop_vid_overlay_cap = dev->loop_vid_overlay;
 209         v4l2_rect_scale(&dev->loop_vid_overlay_cap, &dev->crop_cap, &dev->compose_cap);
 210
 211         dprintk(dev, 1,
 212                 "loop_fb_copy: %dx%d@%dx%d loop_vid_overlay: %dx%d@%dx%d loop_vid_overlay_cap: %dx%d@%dx%d\n",
 213                 dev->loop_fb_copy.width, dev->loop_fb_copy.height,
 214                 dev->loop_fb_copy.left, dev->loop_fb_copy.top,
 215                 dev->loop_vid_overlay.width, dev->loop_vid_overlay.height,
 216                 dev->loop_vid_overlay.left, dev->loop_vid_overlay.top,
 217                 dev->loop_vid_overlay_cap.width, dev->loop_vid_overlay_cap.height,
 218                 dev->loop_vid_overlay_cap.left, dev->loop_vid_overlay_cap.top);
 219 }
 220
 221 static void *plane_vaddr(struct tpg_data *tpg, struct vivid_buffer *buf,
 222                          unsigned p, unsigned bpl[TPG_MAX_PLANES], unsigned h)
 223 {
 224         unsigned i;
 225         void *vbuf;
 226
 227         if (p == 0 || tpg_g_buffers(tpg) > 1)
 228                 return vb2_plane_vaddr(&buf->vb.vb2_buf, p);
 229         vbuf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
 230         for (i = 0; i < p; i++)
 231                 vbuf += bpl[i] * h / tpg->vdownsampling[i];
 232         return vbuf;
 233 }
 234
 235 static int vivid_copy_buffer(struct vivid_dev *dev, unsigned p, u8 *vcapbuf,
 236                 struct vivid_buffer *vid_cap_buf)
 237 {
 238         bool blank = dev->must_blank[vid_cap_buf->vb.vb2_buf.index];
 239         struct tpg_data *tpg = &dev->tpg;
 240         struct vivid_buffer *vid_out_buf = NULL;
 241         unsigned vdiv = dev->fmt_out->vdownsampling[p];
 242         unsigned twopixsize = tpg_g_twopixelsize(tpg, p);
 243         unsigned img_width = tpg_hdiv(tpg, p, dev->compose_cap.width);
 244         unsigned img_height = dev->compose_cap.height;
 245         unsigned stride_cap = tpg->bytesperline[p];
 246         unsigned stride_out = dev->bytesperline_out[p];
 247         unsigned stride_osd = dev->display_byte_stride;
 248         unsigned hmax = (img_height * tpg->perc_fill) / 100;
 249         u8 *voutbuf;
 250         u8 *vosdbuf = NULL;
 251         unsigned y;
 252         bool blend = dev->bitmap_out || dev->clipcount_out || dev->fbuf_out_flags;
 253         /* Coarse scaling with Bresenham */
 254         unsigned vid_out_int_part;
 255         unsigned vid_out_fract_part;
 256         unsigned vid_out_y = 0;
 257         unsigned vid_out_error = 0;
 258         unsigned vid_overlay_int_part = 0;
 259         unsigned vid_overlay_fract_part = 0;
 260         unsigned vid_overlay_y = 0;
 261         unsigned vid_overlay_error = 0;
 262         unsigned vid_cap_left = tpg_hdiv(tpg, p, dev->loop_vid_cap.left);
 263         unsigned vid_cap_right;
 264         bool quick;
 265
 266         vid_out_int_part = dev->loop_vid_out.height / dev->loop_vid_cap.height;
 267         vid_out_fract_part = dev->loop_vid_out.height % dev->loop_vid_cap.height;
 268
 269         if (!list_empty(&dev->vid_out_active))
 270                 vid_out_buf = list_entry(dev->vid_out_active.next,
 271                                          struct vivid_buffer, list);
 272         if (vid_out_buf == NULL)
 273                 return -ENODATA;
 274
 275         vid_cap_buf->vb.field = vid_out_buf->vb.field;
 276
 277         voutbuf = plane_vaddr(tpg, vid_out_buf, p,
 278                               dev->bytesperline_out, dev->fmt_out_rect.height);
 279         if (p < dev->fmt_out->buffers)
 280                 voutbuf += vid_out_buf->vb.vb2_buf.planes[p].data_offset;
 281         voutbuf += tpg_hdiv(tpg, p, dev->loop_vid_out.left) +
 282                 (dev->loop_vid_out.top / vdiv) * stride_out;
 283         vcapbuf += tpg_hdiv(tpg, p, dev->compose_cap.left) +
 284                 (dev->compose_cap.top / vdiv) * stride_cap;
 285
 286         if (dev->loop_vid_copy.width == 0 || dev->loop_vid_copy.height == 0) {
 287                 /*
 288                  * If there is nothing to copy, then just fill the capture window
 289                  * with black.
 290                  */
 291                 for (y = 0; y < hmax / vdiv; y++, vcapbuf += stride_cap)
 292                         memcpy(vcapbuf, tpg->black_line[p], img_width);
 293                 return 0;
 294         }
 295
 296         if (dev->overlay_out_enabled &&
 297             dev->loop_vid_overlay.width && dev->loop_vid_overlay.height) {
 298                 vosdbuf = dev->video_vbase;
 299                 vosdbuf += (dev->loop_fb_copy.left * twopixsize) / 2 +
 300                            dev->loop_fb_copy.top * stride_osd;
 301                 vid_overlay_int_part = dev->loop_vid_overlay.height /
 302                                        dev->loop_vid_overlay_cap.height;
 303                 vid_overlay_fract_part = dev->loop_vid_overlay.height %
 304                                          dev->loop_vid_overlay_cap.height;
 305         }
 306
 307         vid_cap_right = tpg_hdiv(tpg, p, dev->loop_vid_cap.left + dev->loop_vid_cap.width);
 308         /* quick is true if no video scaling is needed */
 309         quick = dev->loop_vid_out.width == dev->loop_vid_cap.width;
 310
 311         dev->cur_scaled_line = dev->loop_vid_out.height;
 312         for (y = 0; y < hmax; y += vdiv, vcapbuf += stride_cap) {
 313                 /* osdline is true if this line requires overlay blending */
 314                 bool osdline = vosdbuf && y >= dev->loop_vid_overlay_cap.top &&
 315                           y < dev->loop_vid_overlay_cap.top + dev->loop_vid_overlay_cap.height;
 316
 317                 /*
 318                  * If this line of the capture buffer doesn't get any video, then
 319                  * just fill with black.
 320                  */
 321                 if (y < dev->loop_vid_cap.top ||
 322                     y >= dev->loop_vid_cap.top + dev->loop_vid_cap.height) {
 323                         memcpy(vcapbuf, tpg->black_line[p], img_width);
 324                         continue;
 325                 }
 326
 327                 /* fill the left border with black */
 328                 if (dev->loop_vid_cap.left)
 329                         memcpy(vcapbuf, tpg->black_line[p], vid_cap_left);
 330
 331                 /* fill the right border with black */
 332                 if (vid_cap_right < img_width)
 333                         memcpy(vcapbuf + vid_cap_right, tpg->black_line[p],
 334                                 img_width - vid_cap_right);
 335
 336                 if (quick && !osdline) {
 337                         memcpy(vcapbuf + vid_cap_left,
 338                                voutbuf + vid_out_y * stride_out,
 339                                tpg_hdiv(tpg, p, dev->loop_vid_cap.width));
 340                         goto update_vid_out_y;
 341                 }
 342                 if (dev->cur_scaled_line == vid_out_y) {
 343                         memcpy(vcapbuf + vid_cap_left, dev->scaled_line,
 344                                tpg_hdiv(tpg, p, dev->loop_vid_cap.width));
 345                         goto update_vid_out_y;
 346                 }
 347                 if (!osdline) {
 348                         scale_line(voutbuf + vid_out_y * stride_out, dev->scaled_line,
 349                                 tpg_hdiv(tpg, p, dev->loop_vid_out.width),
 350                                 tpg_hdiv(tpg, p, dev->loop_vid_cap.width),
 351                                 tpg_g_twopixelsize(tpg, p));
 352                 } else {
 353                         /*
 354                          * Offset in bytes within loop_vid_copy to the start of the
 355                          * loop_vid_overlay rectangle.
 356                          */
 357                         unsigned offset =
 358                                 ((dev->loop_vid_overlay.left - dev->loop_vid_copy.left) *
 359                                  twopixsize) / 2;
 360                         u8 *osd = vosdbuf + vid_overlay_y * stride_osd;
 361
 362                         scale_line(voutbuf + vid_out_y * stride_out, dev->blended_line,
 363                                 dev->loop_vid_out.width, dev->loop_vid_copy.width,
 364                                 tpg_g_twopixelsize(tpg, p));
 365                         if (blend)
 366                                 blend_line(dev, vid_overlay_y + dev->loop_vid_overlay.top,
 367                                            dev->loop_vid_overlay.left,
 368                                            dev->blended_line + offset, osd,
 369                                            dev->loop_vid_overlay.width, twopixsize / 2);
 370                         else
 371                                 memcpy(dev->blended_line + offset,
 372                                        osd, (dev->loop_vid_overlay.width * twopixsize) / 2);
 373                         scale_line(dev->blended_line, dev->scaled_line,
 374                                         dev->loop_vid_copy.width, dev->loop_vid_cap.width,
 375                                         tpg_g_twopixelsize(tpg, p));
 376                 }
 377                 dev->cur_scaled_line = vid_out_y;
 378                 memcpy(vcapbuf + vid_cap_left, dev->scaled_line,
 379                        tpg_hdiv(tpg, p, dev->loop_vid_cap.width));
 380
 381 update_vid_out_y:
 382                 if (osdline) {
 383                         vid_overlay_y += vid_overlay_int_part;
 384                         vid_overlay_error += vid_overlay_fract_part;
 385                         if (vid_overlay_error >= dev->loop_vid_overlay_cap.height) {
 386                                 vid_overlay_error -= dev->loop_vid_overlay_cap.height;
 387                                 vid_overlay_y++;
 388                         }
 389                 }
 390                 vid_out_y += vid_out_int_part;
 391                 vid_out_error += vid_out_fract_part;
 392                 if (vid_out_error >= dev->loop_vid_cap.height / vdiv) {
 393                         vid_out_error -= dev->loop_vid_cap.height / vdiv;
 394                         vid_out_y++;
 395                 }
 396         }
 397
 398         if (!blank)
 399                 return 0;
 400         for (; y < img_height; y += vdiv, vcapbuf += stride_cap)
 401                 memcpy(vcapbuf, tpg->contrast_line[p], img_width);
 402         return 0;
 403 }
 404
 405 static void vivid_fillbuff(struct vivid_dev *dev, struct vivid_buffer *buf)
 406 {
 407         struct tpg_data *tpg = &dev->tpg;
 408         unsigned factor = V4L2_FIELD_HAS_T_OR_B(dev->field_cap) ? 2 : 1;
 409         unsigned line_height = 16 / factor;
 410         bool is_tv = vivid_is_sdtv_cap(dev);
 411         bool is_60hz = is_tv && (dev->std_cap & V4L2_STD_525_60);
 412         unsigned p;
 413         int line = 1;
 414         u8 *basep[TPG_MAX_PLANES][2];
 415         unsigned ms;
 416         char str[100];
 417         s32 gain;
 418         bool is_loop = false;
 419
 420         if (dev->loop_video && dev->can_loop_video &&
 421                 ((vivid_is_svid_cap(dev) &&
 422                 !VIVID_INVALID_SIGNAL(dev->std_signal_mode)) ||
 423                 (vivid_is_hdmi_cap(dev) &&
 424                 !VIVID_INVALID_SIGNAL(dev->dv_timings_signal_mode))))
 425                 is_loop = true;
 426
 427         buf->vb.sequence = dev->vid_cap_seq_count;
 428         /*
 429          * Take the timestamp now if the timestamp source is set to
 430          * "Start of Exposure".
 431          */
 432         if (dev->tstamp_src_is_soe)
 433                 buf->vb.vb2_buf.timestamp = ktime_get_ns();
 434         if (dev->field_cap == V4L2_FIELD_ALTERNATE) {
 435                 /*
 436                  * 60 Hz standards start with the bottom field, 50 Hz standards
 437                  * with the top field. So if the 0-based seq_count is even,
 438                  * then the field is TOP for 50 Hz and BOTTOM for 60 Hz
 439                  * standards.
 440                  */
 441                 buf->vb.field = ((dev->vid_cap_seq_count & 1) ^ is_60hz) ?
 442                         V4L2_FIELD_BOTTOM : V4L2_FIELD_TOP;
 443                 /*
 444                  * The sequence counter counts frames, not fields. So divide
 445                  * by two.
 446                  */
 447                 buf->vb.sequence /= 2;
 448         } else {
 449                 buf->vb.field = dev->field_cap;
 450         }
 451         tpg_s_field(tpg, buf->vb.field,
 452                     dev->field_cap == V4L2_FIELD_ALTERNATE);
 453         tpg_s_perc_fill_blank(tpg, dev->must_blank[buf->vb.vb2_buf.index]);
 454
 455         vivid_precalc_copy_rects(dev);
 456
 457         for (p = 0; p < tpg_g_planes(tpg); p++) {
 458                 void *vbuf = plane_vaddr(tpg, buf, p,
 459                                          tpg->bytesperline, tpg->buf_height);
 460
 461                 /*
 462                  * The first plane of a multiplanar format has a non-zero
 463                  * data_offset. This helps testing whether the application
 464                  * correctly supports non-zero data offsets.
 465                  */
 466                 if (p < tpg_g_buffers(tpg) && dev->fmt_cap->data_offset[p]) {
 467                         memset(vbuf, dev->fmt_cap->data_offset[p] & 0xff,
 468                                dev->fmt_cap->data_offset[p]);
 469                         vbuf += dev->fmt_cap->data_offset[p];
 470                 }
 471                 tpg_calc_text_basep(tpg, basep, p, vbuf);
 472                 if (!is_loop || vivid_copy_buffer(dev, p, vbuf, buf))
 473                         tpg_fill_plane_buffer(tpg, vivid_get_std_cap(dev),
 474                                         p, vbuf);
 475         }
 476         dev->must_blank[buf->vb.vb2_buf.index] = false;
 477
 478         /* Updates stream time, only update at the start of a new frame. */
 479         if (dev->field_cap != V4L2_FIELD_ALTERNATE ||
 480                         (dev->vid_cap_seq_count & 1) == 0)
 481                 dev->ms_vid_cap =
 482                         jiffies_to_msecs(jiffies - dev->jiffies_vid_cap);
 483
 484         ms = dev->ms_vid_cap;
 485         if (dev->osd_mode <= 1) {
 486                 snprintf(str, sizeof(str), " %02d:%02d:%02d:%03d %u%s",
 487                                 (ms / (60 * 60 * 1000)) % 24,
 488                                 (ms / (60 * 1000)) % 60,
 489                                 (ms / 1000) % 60,
 490                                 ms % 1000,
 491                                 buf->vb.sequence,
 492                                 (dev->field_cap == V4L2_FIELD_ALTERNATE) ?
 493                                         (buf->vb.field == V4L2_FIELD_TOP ?
 494                                          " top" : " bottom") : "");
 495                 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 496         }
 497         if (dev->osd_mode == 0) {
 498                 snprintf(str, sizeof(str), " %dx%d, input %d ",
 499                                 dev->src_rect.width, dev->src_rect.height, dev->input);
 500                 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 501
 502                 gain = v4l2_ctrl_g_ctrl(dev->gain);
 503                 mutex_lock(dev->ctrl_hdl_user_vid.lock);
 504                 snprintf(str, sizeof(str),
 505                         " brightness %3d, contrast %3d, saturation %3d, hue %d ",
 506                         dev->brightness->cur.val,
 507                         dev->contrast->cur.val,
 508                         dev->saturation->cur.val,
 509                         dev->hue->cur.val);
 510                 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 511                 snprintf(str, sizeof(str),
 512                         " autogain %d, gain %3d, alpha 0x%02x ",
 513                         dev->autogain->cur.val, gain, dev->alpha->cur.val);
 514                 mutex_unlock(dev->ctrl_hdl_user_vid.lock);
 515                 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 516                 mutex_lock(dev->ctrl_hdl_user_aud.lock);
 517                 snprintf(str, sizeof(str),
 518                         " volume %3d, mute %d ",
 519                         dev->volume->cur.val, dev->mute->cur.val);
 520                 mutex_unlock(dev->ctrl_hdl_user_aud.lock);
 521                 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 522                 mutex_lock(dev->ctrl_hdl_user_gen.lock);
 523                 snprintf(str, sizeof(str), " int32 %d, int64 %lld, bitmask %08x ",
 524                         dev->int32->cur.val,
 525                         *dev->int64->p_cur.p_s64,
 526                         dev->bitmask->cur.val);
 527                 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 528                 snprintf(str, sizeof(str), " boolean %d, menu %s, string \"%s\" ",
 529                         dev->boolean->cur.val,
 530                         dev->menu->qmenu[dev->menu->cur.val],
 531                         dev->string->p_cur.p_char);
 532                 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 533                 snprintf(str, sizeof(str), " integer_menu %lld, value %d ",
 534                         dev->int_menu->qmenu_int[dev->int_menu->cur.val],
 535                         dev->int_menu->cur.val);
 536                 mutex_unlock(dev->ctrl_hdl_user_gen.lock);
 537                 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 538                 if (dev->button_pressed) {
 539                         dev->button_pressed--;
 540                         snprintf(str, sizeof(str), " button pressed!");
 541                         tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 542                 }
 543                 if (dev->osd[0]) {
 544                         if (vivid_is_hdmi_cap(dev)) {
 545                                 snprintf(str, sizeof(str),
 546                                          " OSD \"%s\"", dev->osd);
 547                                 tpg_gen_text(tpg, basep, line++ * line_height,
 548                                              16, str);
 549                         }
 550                         if (dev->osd_jiffies &&
 551                             time_is_before_jiffies(dev->osd_jiffies + 5 * HZ)) {
 552                                 dev->osd[0] = 0;
 553                                 dev->osd_jiffies = 0;
 554                         }
 555                 }
 556         }
 557
 558         /*
 559          * If "End of Frame" is specified at the timestamp source, then take
 560          * the timestamp now.
 561          */
 562         if (!dev->tstamp_src_is_soe)
 563                 buf->vb.vb2_buf.timestamp = ktime_get_ns();
 564         buf->vb.vb2_buf.timestamp += dev->time_wrap_offset;
 565 }
 566
 567 /*
 568  * Return true if this pixel coordinate is a valid video pixel.
 569  */
 570 static bool valid_pix(struct vivid_dev *dev, int win_y, int win_x, int fb_y, int fb_x)
 571 {
 572         int i;
 573
 574         if (dev->bitmap_cap) {
 575                 /*
 576                  * Only if the corresponding bit in the bitmap is set can
 577                  * the video pixel be shown. Coordinates are relative to
 578                  * the overlay window set by VIDIOC_S_FMT.
 579                  */
 580                 const u8 *p = dev->bitmap_cap;
 581                 unsigned stride = (dev->compose_cap.width + 7) / 8;
 582
 583                 if (!(p[stride * win_y + win_x / 8] & (1 << (win_x & 7))))
 584                         return false;
 585         }
 586
 587         for (i = 0; i < dev->clipcount_cap; i++) {
 588                 /*
 589                  * Only if the framebuffer coordinate is not in any of the
 590                  * clip rectangles will be video pixel be shown.
 591                  */
 592                 struct v4l2_rect *r = &dev->clips_cap[i].c;
 593
 594                 if (fb_y >= r->top && fb_y < r->top + r->height &&
 595                     fb_x >= r->left && fb_x < r->left + r->width)
 596                         return false;
 597         }
 598         return true;
 599 }
 600
 601 /*
 602  * Draw the image into the overlay buffer.
 603  * Note that the combination of overlay and multiplanar is not supported.
 604  */
 605 static void vivid_overlay(struct vivid_dev *dev, struct vivid_buffer *buf)
 606 {
 607         struct tpg_data *tpg = &dev->tpg;
 608         unsigned pixsize = tpg_g_twopixelsize(tpg, 0) / 2;
 609         void *vbase = dev->fb_vbase_cap;
 610         void *vbuf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
 611         unsigned img_width = dev->compose_cap.width;
 612         unsigned img_height = dev->compose_cap.height;
 613         unsigned stride = tpg->bytesperline[0];
 614         /* if quick is true, then valid_pix() doesn't have to be called */
 615         bool quick = dev->bitmap_cap == NULL && dev->clipcount_cap == 0;
 616         int x, y, w, out_x = 0;
 617
 618         /*
 619          * Overlay support is only supported for formats that have a twopixelsize
 620          * that's >= 2. Warn and bail out if that's not the case.
 621          */
 622         if (WARN_ON(pixsize == 0))
 623                 return;
 624         if ((dev->overlay_cap_field == V4L2_FIELD_TOP ||
 625              dev->overlay_cap_field == V4L2_FIELD_BOTTOM) &&
 626             dev->overlay_cap_field != buf->vb.field)
 627                 return;
 628
 629         vbuf += dev->compose_cap.left * pixsize + dev->compose_cap.top * stride;
 630         x = dev->overlay_cap_left;
 631         w = img_width;
 632         if (x < 0) {
 633                 out_x = -x;
 634                 w = w - out_x;
 635                 x = 0;
 636         } else {
 637                 w = dev->fb_cap.fmt.width - x;
 638                 if (w > img_width)
 639                         w = img_width;
 640         }
 641         if (w <= 0)
 642                 return;
 643         if (dev->overlay_cap_top >= 0)
 644                 vbase += dev->overlay_cap_top * dev->fb_cap.fmt.bytesperline;
 645         for (y = dev->overlay_cap_top;
 646              y < dev->overlay_cap_top + (int)img_height;
 647              y++, vbuf += stride) {
 648                 int px;
 649
 650                 if (y < 0 || y > dev->fb_cap.fmt.height)
 651                         continue;
 652                 if (quick) {
 653                         memcpy(vbase + x * pixsize,
 654                                vbuf + out_x * pixsize, w * pixsize);
 655                         vbase += dev->fb_cap.fmt.bytesperline;
 656                         continue;
 657                 }
 658                 for (px = 0; px < w; px++) {
 659                         if (!valid_pix(dev, y - dev->overlay_cap_top,
 660                                        px + out_x, y, px + x))
 661                                 continue;
 662                         memcpy(vbase + (px + x) * pixsize,
 663                                vbuf + (px + out_x) * pixsize,
 664                                pixsize);
 665                 }
 666                 vbase += dev->fb_cap.fmt.bytesperline;
 667         }
 668 }
 669
 670 static void vivid_thread_vid_cap_tick(struct vivid_dev *dev, int dropped_bufs)
 671 {
 672         struct vivid_buffer *vid_cap_buf = NULL;
 673         struct vivid_buffer *vbi_cap_buf = NULL;
 674
 675         dprintk(dev, 1, "Video Capture Thread Tick\n");
 676
 677         while (dropped_bufs-- > 1)
 678                 tpg_update_mv_count(&dev->tpg,
 679                                 dev->field_cap == V4L2_FIELD_NONE ||
 680                                 dev->field_cap == V4L2_FIELD_ALTERNATE);
 681
 682         /* Drop a certain percentage of buffers. */
 683         if (dev->perc_dropped_buffers &&
 684             prandom_u32_max(100) < dev->perc_dropped_buffers)
 685                 goto update_mv;
 686
 687         spin_lock(&dev->slock);
 688         if (!list_empty(&dev->vid_cap_active)) {
 689                 vid_cap_buf = list_entry(dev->vid_cap_active.next, struct vivid_buffer, list);
 690                 list_del(&vid_cap_buf->list);
 691         }
 692         if (!list_empty(&dev->vbi_cap_active)) {
 693                 if (dev->field_cap != V4L2_FIELD_ALTERNATE ||
 694                     (dev->vbi_cap_seq_count & 1)) {
 695                         vbi_cap_buf = list_entry(dev->vbi_cap_active.next,
 696                                                  struct vivid_buffer, list);
 697                         list_del(&vbi_cap_buf->list);
 698                 }
 699         }
 700         spin_unlock(&dev->slock);
 701
 702         if (!vid_cap_buf && !vbi_cap_buf)
 703                 goto update_mv;
 704
 705         if (vid_cap_buf) {
 706                 /* Fill buffer */
 707                 vivid_fillbuff(dev, vid_cap_buf);
 708                 dprintk(dev, 1, "filled buffer %d\n",
 709                         vid_cap_buf->vb.vb2_buf.index);
 710
 711                 /* Handle overlay */
 712                 if (dev->overlay_cap_owner && dev->fb_cap.base &&
 713                         dev->fb_cap.fmt.pixelformat == dev->fmt_cap->fourcc)
 714                         vivid_overlay(dev, vid_cap_buf);
 715
 716                 vb2_buffer_done(&vid_cap_buf->vb.vb2_buf, dev->dqbuf_error ?
 717                                 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
 718                 dprintk(dev, 2, "vid_cap buffer %d done\n",
 719                                 vid_cap_buf->vb.vb2_buf.index);
 720         }
 721
 722         if (vbi_cap_buf) {
 723                 if (dev->stream_sliced_vbi_cap)
 724                         vivid_sliced_vbi_cap_process(dev, vbi_cap_buf);
 725                 else
 726                         vivid_raw_vbi_cap_process(dev, vbi_cap_buf);
 727                 vb2_buffer_done(&vbi_cap_buf->vb.vb2_buf, dev->dqbuf_error ?
 728                                 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
 729                 dprintk(dev, 2, "vbi_cap %d done\n",
 730                                 vbi_cap_buf->vb.vb2_buf.index);
 731         }
 732         dev->dqbuf_error = false;
 733
 734 update_mv:
 735         /* Update the test pattern movement counters */
 736         tpg_update_mv_count(&dev->tpg, dev->field_cap == V4L2_FIELD_NONE ||
 737                                        dev->field_cap == V4L2_FIELD_ALTERNATE);
 738 }
 739
 740 static int vivid_thread_vid_cap(void *data)
 741 {
 742         struct vivid_dev *dev = data;
 743         u64 numerators_since_start;
 744         u64 buffers_since_start;
 745         u64 next_jiffies_since_start;
 746         unsigned long jiffies_since_start;
 747         unsigned long cur_jiffies;
 748         unsigned wait_jiffies;
 749         unsigned numerator;
 750         unsigned denominator;
 751         int dropped_bufs;
 752
 753         dprintk(dev, 1, "Video Capture Thread Start\n");
 754
 755         set_freezable();
 756
 757         /* Resets frame counters */
 758         dev->cap_seq_offset = 0;
 759         dev->cap_seq_count = 0;
 760         dev->cap_seq_resync = false;
 761         dev->jiffies_vid_cap = jiffies;
 762
 763         for (;;) {
 764                 try_to_freeze();
 765                 if (kthread_should_stop())
 766                         break;
 767
 768                 mutex_lock(&dev->mutex);
 769                 cur_jiffies = jiffies;
 770                 if (dev->cap_seq_resync) {
 771                         dev->jiffies_vid_cap = cur_jiffies;
 772                         dev->cap_seq_offset = dev->cap_seq_count + 1;
 773                         dev->cap_seq_count = 0;
 774                         dev->cap_seq_resync = false;
 775                 }
 776                 numerator = dev->timeperframe_vid_cap.numerator;
 777                 denominator = dev->timeperframe_vid_cap.denominator;
 778
 779                 if (dev->field_cap == V4L2_FIELD_ALTERNATE)
 780                         denominator *= 2;
 781
 782                 /* Calculate the number of jiffies since we started streaming */
 783                 jiffies_since_start = cur_jiffies - dev->jiffies_vid_cap;
 784                 /* Get the number of buffers streamed since the start */
 785                 buffers_since_start = (u64)jiffies_since_start * denominator +
 786                                       (HZ * numerator) / 2;
 787                 do_div(buffers_since_start, HZ * numerator);
 788
 789                 /*
 790                  * After more than 0xf0000000 (rounded down to a multiple of
 791                  * 'jiffies-per-day' to ease jiffies_to_msecs calculation)
 792                  * jiffies have passed since we started streaming reset the
 793                  * counters and keep track of the sequence offset.
 794                  */
 795                 if (jiffies_since_start > JIFFIES_RESYNC) {
 796                         dev->jiffies_vid_cap = cur_jiffies;
 797                         dev->cap_seq_offset = buffers_since_start;
 798                         buffers_since_start = 0;
 799                 }
 800                 dropped_bufs = buffers_since_start + dev->cap_seq_offset - dev->cap_seq_count;
 801                 dev->cap_seq_count = buffers_since_start + dev->cap_seq_offset;
 802                 dev->vid_cap_seq_count = dev->cap_seq_count - dev->vid_cap_seq_start;
 803                 dev->vbi_cap_seq_count = dev->cap_seq_count - dev->vbi_cap_seq_start;
 804
 805                 vivid_thread_vid_cap_tick(dev, dropped_bufs);
 806
 807                 /*
 808                  * Calculate the number of 'numerators' streamed since we started,
 809                  * including the current buffer.
 810                  */
 811                 numerators_since_start = ++buffers_since_start * numerator;
 812
 813                 /* And the number of jiffies since we started */
 814                 jiffies_since_start = jiffies - dev->jiffies_vid_cap;
 815
 816                 mutex_unlock(&dev->mutex);
 817
 818                 /*
 819                  * Calculate when that next buffer is supposed to start
 820                  * in jiffies since we started streaming.
 821                  */
 822                 next_jiffies_since_start = numerators_since_start * HZ +
 823                                            denominator / 2;
 824                 do_div(next_jiffies_since_start, denominator);
 825                 /* If it is in the past, then just schedule asap */
 826                 if (next_jiffies_since_start < jiffies_since_start)
 827                         next_jiffies_since_start = jiffies_since_start;
 828
 829                 wait_jiffies = next_jiffies_since_start - jiffies_since_start;
 830                 schedule_timeout_interruptible(wait_jiffies ? wait_jiffies : 1);
 831         }
 832         dprintk(dev, 1, "Video Capture Thread End\n");
 833         return 0;
 834 }
 835
 836 static void vivid_grab_controls(struct vivid_dev *dev, bool grab)
 837 {
 838         v4l2_ctrl_grab(dev->ctrl_has_crop_cap, grab);
 839         v4l2_ctrl_grab(dev->ctrl_has_compose_cap, grab);
 840         v4l2_ctrl_grab(dev->ctrl_has_scaler_cap, grab);
 841 }
 842
 843 int vivid_start_generating_vid_cap(struct vivid_dev *dev, bool *pstreaming)
 844 {
 845         dprintk(dev, 1, "%s\n", __func__);
 846
 847         if (dev->kthread_vid_cap) {
 848                 u32 seq_count = dev->cap_seq_count + dev->seq_wrap * 128;
 849
 850                 if (pstreaming == &dev->vid_cap_streaming)
 851                         dev->vid_cap_seq_start = seq_count;
 852                 else
 853                         dev->vbi_cap_seq_start = seq_count;
 854                 *pstreaming = true;
 855                 return 0;
 856         }
 857
 858         /* Resets frame counters */
 859         tpg_init_mv_count(&dev->tpg);
 860
 861         dev->vid_cap_seq_start = dev->seq_wrap * 128;
 862         dev->vbi_cap_seq_start = dev->seq_wrap * 128;
 863
 864         dev->kthread_vid_cap = kthread_run(vivid_thread_vid_cap, dev,
 865                         "%s-vid-cap", dev->v4l2_dev.name);
 866
 867         if (IS_ERR(dev->kthread_vid_cap)) {
 868                 v4l2_err(&dev->v4l2_dev, "kernel_thread() failed\n");
 869                 return PTR_ERR(dev->kthread_vid_cap);
 870         }
 871         *pstreaming = true;
 872         vivid_grab_controls(dev, true);
 873
 874         dprintk(dev, 1, "returning from %s\n", __func__);
 875         return 0;
 876 }
 877
 878 void vivid_stop_generating_vid_cap(struct vivid_dev *dev, bool *pstreaming)
 879 {
 880         dprintk(dev, 1, "%s\n", __func__);
 881
 882         if (dev->kthread_vid_cap == NULL)
 883                 return;
 884
 885         *pstreaming = false;
 886         if (pstreaming == &dev->vid_cap_streaming) {
 887                 /* Release all active buffers */
 888                 while (!list_empty(&dev->vid_cap_active)) {
 889                         struct vivid_buffer *buf;
 890
 891                         buf = list_entry(dev->vid_cap_active.next,
 892                                          struct vivid_buffer, list);
 893                         list_del(&buf->list);
 894                         vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 895                         dprintk(dev, 2, "vid_cap buffer %d done\n",
 896                                 buf->vb.vb2_buf.index);
 897                 }
 898         }
 899
 900         if (pstreaming == &dev->vbi_cap_streaming) {
 901                 while (!list_empty(&dev->vbi_cap_active)) {
 902                         struct vivid_buffer *buf;
 903
 904                         buf = list_entry(dev->vbi_cap_active.next,
 905                                          struct vivid_buffer, list);
 906                         list_del(&buf->list);
 907                         vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 908                         dprintk(dev, 2, "vbi_cap buffer %d done\n",
 909                                 buf->vb.vb2_buf.index);
 910                 }
 911         }
 912
 913         if (dev->vid_cap_streaming || dev->vbi_cap_streaming)
 914                 return;
 915
 916         /* shutdown control thread */
 917         vivid_grab_controls(dev, false);
 918         mutex_unlock(&dev->mutex);
 919         kthread_stop(dev->kthread_vid_cap);
 920         dev->kthread_vid_cap = NULL;
 921         mutex_lock(&dev->mutex);
 922 }