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

   1 /*
   2  * vivid-kthread-cap.h - video/vbi capture thread support functions.
   3  *
   4  * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
   5  *
   6  * This program is free software; you may redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  11  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  12  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  13  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  14  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  15  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  16  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  17  * SOFTWARE.
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/errno.h>
  22 #include <linux/kernel.h>
  23 #include <linux/init.h>
  24 #include <linux/sched.h>
  25 #include <linux/slab.h>
  26 #include <linux/font.h>
  27 #include <linux/mutex.h>
  28 #include <linux/videodev2.h>
  29 #include <linux/kthread.h>
  30 #include <linux/freezer.h>
  31 #include <linux/random.h>
  32 #include <linux/v4l2-dv-timings.h>
  33 #include <asm/div64.h>
  34 #include <media/videobuf2-vmalloc.h>
  35 #include <media/v4l2-dv-timings.h>
  36 #include <media/v4l2-ioctl.h>
  37 #include <media/v4l2-fh.h>
  38 #include <media/v4l2-event.h>
  39
  40 #include "vivid-core.h"
  41 #include "vivid-vid-common.h"
  42 #include "vivid-vid-cap.h"
  43 #include "vivid-vid-out.h"
  44 #include "vivid-radio-common.h"
  45 #include "vivid-radio-rx.h"
  46 #include "vivid-radio-tx.h"
  47 #include "vivid-sdr-cap.h"
  48 #include "vivid-vbi-cap.h"
  49 #include "vivid-vbi-out.h"
  50 #include "vivid-osd.h"
  51 #include "vivid-ctrls.h"
  52 #include "vivid-kthread-cap.h"
  53
  54 static inline v4l2_std_id vivid_get_std_cap(const struct vivid_dev *dev)
  55 {
  56         if (vivid_is_sdtv_cap(dev))
  57                 return dev->std_cap;
  58         return 0;
  59 }
  60
  61 static void copy_pix(struct vivid_dev *dev, int win_y, int win_x,
  62                         u16 *cap, const u16 *osd)
  63 {
  64         u16 out;
  65         int left = dev->overlay_out_left;
  66         int top = dev->overlay_out_top;
  67         int fb_x = win_x + left;
  68         int fb_y = win_y + top;
  69         int i;
  70
  71         out = *cap;
  72         *cap = *osd;
  73         if (dev->bitmap_out) {
  74                 const u8 *p = dev->bitmap_out;
  75                 unsigned stride = (dev->compose_out.width + 7) / 8;
  76
  77                 win_x -= dev->compose_out.left;
  78                 win_y -= dev->compose_out.top;
  79                 if (!(p[stride * win_y + win_x / 8] & (1 << (win_x & 7))))
  80                         return;
  81         }
  82
  83         for (i = 0; i < dev->clipcount_out; i++) {
  84                 struct v4l2_rect *r = &dev->clips_out[i].c;
  85
  86                 if (fb_y >= r->top && fb_y < r->top + r->height &&
  87                     fb_x >= r->left && fb_x < r->left + r->width)
  88                         return;
  89         }
  90         if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_CHROMAKEY) &&
  91             *osd != dev->chromakey_out)
  92                 return;
  93         if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_SRC_CHROMAKEY) &&
  94             out == dev->chromakey_out)
  95                 return;
  96         if (dev->fmt_cap->alpha_mask) {
  97                 if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_GLOBAL_ALPHA) &&
  98                     dev->global_alpha_out)
  99                         return;
 100                 if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_LOCAL_ALPHA) &&
 101                     *cap & dev->fmt_cap->alpha_mask)
 102                         return;
 103                 if ((dev->fbuf_out_flags & V4L2_FBUF_FLAG_LOCAL_INV_ALPHA) &&
 104                     !(*cap & dev->fmt_cap->alpha_mask))
 105                         return;
 106         }
 107         *cap = out;
 108 }
 109
 110 static void blend_line(struct vivid_dev *dev, unsigned y_offset, unsigned x_offset,
 111                 u8 *vcapbuf, const u8 *vosdbuf,
 112                 unsigned width, unsigned pixsize)
 113 {
 114         unsigned x;
 115
 116         for (x = 0; x < width; x++, vcapbuf += pixsize, vosdbuf += pixsize) {
 117                 copy_pix(dev, y_offset, x_offset + x,
 118                          (u16 *)vcapbuf, (const u16 *)vosdbuf);
 119         }
 120 }
 121
 122 static void scale_line(const u8 *src, u8 *dst, unsigned srcw, unsigned dstw, unsigned twopixsize)
 123 {
 124         /* Coarse scaling with Bresenham */
 125         unsigned int_part;
 126         unsigned fract_part;
 127         unsigned src_x = 0;
 128         unsigned error = 0;
 129         unsigned x;
 130
 131         /*
 132          * We always combine two pixels to prevent color bleed in the packed
 133          * yuv case.
 134          */
 135         srcw /= 2;
 136         dstw /= 2;
 137         int_part = srcw / dstw;
 138         fract_part = srcw % dstw;
 139         for (x = 0; x < dstw; x++, dst += twopixsize) {
 140                 memcpy(dst, src + src_x * twopixsize, twopixsize);
 141                 src_x += int_part;
 142                 error += fract_part;
 143                 if (error >= dstw) {
 144                         error -= dstw;
 145                         src_x++;
 146                 }
 147         }
 148 }
 149
 150 /*
 151  * Precalculate the rectangles needed to perform video looping:
 152  *
 153  * The nominal pipeline is that the video output buffer is cropped by
 154  * crop_out, scaled to compose_out, overlaid with the output overlay,
 155  * cropped on the capture side by crop_cap and scaled again to the video
 156  * capture buffer using compose_cap.
 157  *
 158  * To keep things efficient we calculate the intersection of compose_out
 159  * and crop_cap (since that's the only part of the video that will
 160  * actually end up in the capture buffer), determine which part of the
 161  * video output buffer that is and which part of the video capture buffer
 162  * so we can scale the video straight from the output buffer to the capture
 163  * buffer without any intermediate steps.
 164  *
 165  * If we need to deal with an output overlay, then there is no choice and
 166  * that intermediate step still has to be taken. For the output overlay
 167  * support we calculate the intersection of the framebuffer and the overlay
 168  * window (which may be partially or wholly outside of the framebuffer
 169  * itself) and the intersection of that with loop_vid_copy (i.e. the part of
 170  * the actual looped video that will be overlaid). The result is calculated
 171  * both in framebuffer coordinates (loop_fb_copy) and compose_out coordinates
 172  * (loop_vid_overlay). Finally calculate the part of the capture buffer that
 173  * will receive that overlaid video.
 174  */
 175 static void vivid_precalc_copy_rects(struct vivid_dev *dev)
 176 {
 177         /* Framebuffer rectangle */
 178         struct v4l2_rect r_fb = {
 179                 0, 0, dev->display_width, dev->display_height
 180         };
 181         /* Overlay window rectangle in framebuffer coordinates */
 182         struct v4l2_rect r_overlay = {
 183                 dev->overlay_out_left, dev->overlay_out_top,
 184                 dev->compose_out.width, dev->compose_out.height
 185         };
 186
 187         dev->loop_vid_copy = rect_intersect(&dev->crop_cap, &dev->compose_out);
 188
 189         dev->loop_vid_out = dev->loop_vid_copy;
 190         rect_scale(&dev->loop_vid_out, &dev->compose_out, &dev->crop_out);
 191         dev->loop_vid_out.left += dev->crop_out.left;
 192         dev->loop_vid_out.top += dev->crop_out.top;
 193
 194         dev->loop_vid_cap = dev->loop_vid_copy;
 195         rect_scale(&dev->loop_vid_cap, &dev->crop_cap, &dev->compose_cap);
 196
 197         dprintk(dev, 1,
 198                 "loop_vid_copy: %dx%d@%dx%d loop_vid_out: %dx%d@%dx%d loop_vid_cap: %dx%d@%dx%d\n",
 199                 dev->loop_vid_copy.width, dev->loop_vid_copy.height,
 200                 dev->loop_vid_copy.left, dev->loop_vid_copy.top,
 201                 dev->loop_vid_out.width, dev->loop_vid_out.height,
 202                 dev->loop_vid_out.left, dev->loop_vid_out.top,
 203                 dev->loop_vid_cap.width, dev->loop_vid_cap.height,
 204                 dev->loop_vid_cap.left, dev->loop_vid_cap.top);
 205
 206         r_overlay = rect_intersect(&r_fb, &r_overlay);
 207
 208         /* shift r_overlay to the same origin as compose_out */
 209         r_overlay.left += dev->compose_out.left - dev->overlay_out_left;
 210         r_overlay.top += dev->compose_out.top - dev->overlay_out_top;
 211
 212         dev->loop_vid_overlay = rect_intersect(&r_overlay, &dev->loop_vid_copy);
 213         dev->loop_fb_copy = dev->loop_vid_overlay;
 214
 215         /* shift dev->loop_fb_copy back again to the fb origin */
 216         dev->loop_fb_copy.left -= dev->compose_out.left - dev->overlay_out_left;
 217         dev->loop_fb_copy.top -= dev->compose_out.top - dev->overlay_out_top;
 218
 219         dev->loop_vid_overlay_cap = dev->loop_vid_overlay;
 220         rect_scale(&dev->loop_vid_overlay_cap, &dev->crop_cap, &dev->compose_cap);
 221
 222         dprintk(dev, 1,
 223                 "loop_fb_copy: %dx%d@%dx%d loop_vid_overlay: %dx%d@%dx%d loop_vid_overlay_cap: %dx%d@%dx%d\n",
 224                 dev->loop_fb_copy.width, dev->loop_fb_copy.height,
 225                 dev->loop_fb_copy.left, dev->loop_fb_copy.top,
 226                 dev->loop_vid_overlay.width, dev->loop_vid_overlay.height,
 227                 dev->loop_vid_overlay.left, dev->loop_vid_overlay.top,
 228                 dev->loop_vid_overlay_cap.width, dev->loop_vid_overlay_cap.height,
 229                 dev->loop_vid_overlay_cap.left, dev->loop_vid_overlay_cap.top);
 230 }
 231
 232 static void *plane_vaddr(struct tpg_data *tpg, struct vivid_buffer *buf,
 233                          unsigned p, unsigned bpl[TPG_MAX_PLANES], unsigned h)
 234 {
 235         unsigned i;
 236         void *vbuf;
 237
 238         if (p == 0 || tpg_g_buffers(tpg) > 1)
 239                 return vb2_plane_vaddr(&buf->vb, p);
 240         vbuf = vb2_plane_vaddr(&buf->vb, 0);
 241         for (i = 0; i < p; i++)
 242                 vbuf += bpl[i] * h / tpg->vdownsampling[i];
 243         return vbuf;
 244 }
 245
 246 static int vivid_copy_buffer(struct vivid_dev *dev, unsigned p, u8 *vcapbuf,
 247                 struct vivid_buffer *vid_cap_buf)
 248 {
 249         bool blank = dev->must_blank[vid_cap_buf->vb.v4l2_buf.index];
 250         struct tpg_data *tpg = &dev->tpg;
 251         struct vivid_buffer *vid_out_buf = NULL;
 252         unsigned vdiv = dev->fmt_out->vdownsampling[p];
 253         unsigned twopixsize = tpg_g_twopixelsize(tpg, p);
 254         unsigned img_width = tpg_hdiv(tpg, p, dev->compose_cap.width);
 255         unsigned img_height = dev->compose_cap.height;
 256         unsigned stride_cap = tpg->bytesperline[p];
 257         unsigned stride_out = dev->bytesperline_out[p];
 258         unsigned stride_osd = dev->display_byte_stride;
 259         unsigned hmax = (img_height * tpg->perc_fill) / 100;
 260         u8 *voutbuf;
 261         u8 *vosdbuf = NULL;
 262         unsigned y;
 263         bool blend = dev->bitmap_out || dev->clipcount_out || dev->fbuf_out_flags;
 264         /* Coarse scaling with Bresenham */
 265         unsigned vid_out_int_part;
 266         unsigned vid_out_fract_part;
 267         unsigned vid_out_y = 0;
 268         unsigned vid_out_error = 0;
 269         unsigned vid_overlay_int_part = 0;
 270         unsigned vid_overlay_fract_part = 0;
 271         unsigned vid_overlay_y = 0;
 272         unsigned vid_overlay_error = 0;
 273         unsigned vid_cap_left = tpg_hdiv(tpg, p, dev->loop_vid_cap.left);
 274         unsigned vid_cap_right;
 275         bool quick;
 276
 277         vid_out_int_part = dev->loop_vid_out.height / dev->loop_vid_cap.height;
 278         vid_out_fract_part = dev->loop_vid_out.height % dev->loop_vid_cap.height;
 279
 280         if (!list_empty(&dev->vid_out_active))
 281                 vid_out_buf = list_entry(dev->vid_out_active.next,
 282                                          struct vivid_buffer, list);
 283         if (vid_out_buf == NULL)
 284                 return -ENODATA;
 285
 286         vid_cap_buf->vb.v4l2_buf.field = vid_out_buf->vb.v4l2_buf.field;
 287
 288         voutbuf = plane_vaddr(tpg, vid_out_buf, p,
 289                               dev->bytesperline_out, dev->fmt_out_rect.height);
 290         if (p < dev->fmt_out->buffers)
 291                 voutbuf += vid_out_buf->vb.v4l2_planes[p].data_offset;
 292         voutbuf += tpg_hdiv(tpg, p, dev->loop_vid_out.left) +
 293                 (dev->loop_vid_out.top / vdiv) * stride_out;
 294         vcapbuf += tpg_hdiv(tpg, p, dev->compose_cap.left) +
 295                 (dev->compose_cap.top / vdiv) * stride_cap;
 296
 297         if (dev->loop_vid_copy.width == 0 || dev->loop_vid_copy.height == 0) {
 298                 /*
 299                  * If there is nothing to copy, then just fill the capture window
 300                  * with black.
 301                  */
 302                 for (y = 0; y < hmax / vdiv; y++, vcapbuf += stride_cap)
 303                         memcpy(vcapbuf, tpg->black_line[p], img_width);
 304                 return 0;
 305         }
 306
 307         if (dev->overlay_out_enabled &&
 308             dev->loop_vid_overlay.width && dev->loop_vid_overlay.height) {
 309                 vosdbuf = dev->video_vbase;
 310                 vosdbuf += (dev->loop_fb_copy.left * twopixsize) / 2 +
 311                            dev->loop_fb_copy.top * stride_osd;
 312                 vid_overlay_int_part = dev->loop_vid_overlay.height /
 313                                        dev->loop_vid_overlay_cap.height;
 314                 vid_overlay_fract_part = dev->loop_vid_overlay.height %
 315                                          dev->loop_vid_overlay_cap.height;
 316         }
 317
 318         vid_cap_right = tpg_hdiv(tpg, p, dev->loop_vid_cap.left + dev->loop_vid_cap.width);
 319         /* quick is true if no video scaling is needed */
 320         quick = dev->loop_vid_out.width == dev->loop_vid_cap.width;
 321
 322         dev->cur_scaled_line = dev->loop_vid_out.height;
 323         for (y = 0; y < hmax; y += vdiv, vcapbuf += stride_cap) {
 324                 /* osdline is true if this line requires overlay blending */
 325                 bool osdline = vosdbuf && y >= dev->loop_vid_overlay_cap.top &&
 326                           y < dev->loop_vid_overlay_cap.top + dev->loop_vid_overlay_cap.height;
 327
 328                 /*
 329                  * If this line of the capture buffer doesn't get any video, then
 330                  * just fill with black.
 331                  */
 332                 if (y < dev->loop_vid_cap.top ||
 333                     y >= dev->loop_vid_cap.top + dev->loop_vid_cap.height) {
 334                         memcpy(vcapbuf, tpg->black_line[p], img_width);
 335                         continue;
 336                 }
 337
 338                 /* fill the left border with black */
 339                 if (dev->loop_vid_cap.left)
 340                         memcpy(vcapbuf, tpg->black_line[p], vid_cap_left);
 341
 342                 /* fill the right border with black */
 343                 if (vid_cap_right < img_width)
 344                         memcpy(vcapbuf + vid_cap_right, tpg->black_line[p],
 345                                 img_width - vid_cap_right);
 346
 347                 if (quick && !osdline) {
 348                         memcpy(vcapbuf + vid_cap_left,
 349                                voutbuf + vid_out_y * stride_out,
 350                                tpg_hdiv(tpg, p, dev->loop_vid_cap.width));
 351                         goto update_vid_out_y;
 352                 }
 353                 if (dev->cur_scaled_line == vid_out_y) {
 354                         memcpy(vcapbuf + vid_cap_left, dev->scaled_line,
 355                                tpg_hdiv(tpg, p, dev->loop_vid_cap.width));
 356                         goto update_vid_out_y;
 357                 }
 358                 if (!osdline) {
 359                         scale_line(voutbuf + vid_out_y * stride_out, dev->scaled_line,
 360                                 tpg_hdiv(tpg, p, dev->loop_vid_out.width),
 361                                 tpg_hdiv(tpg, p, dev->loop_vid_cap.width),
 362                                 tpg_g_twopixelsize(tpg, p));
 363                 } else {
 364                         /*
 365                          * Offset in bytes within loop_vid_copy to the start of the
 366                          * loop_vid_overlay rectangle.
 367                          */
 368                         unsigned offset =
 369                                 ((dev->loop_vid_overlay.left - dev->loop_vid_copy.left) *
 370                                  twopixsize) / 2;
 371                         u8 *osd = vosdbuf + vid_overlay_y * stride_osd;
 372
 373                         scale_line(voutbuf + vid_out_y * stride_out, dev->blended_line,
 374                                 dev->loop_vid_out.width, dev->loop_vid_copy.width,
 375                                 tpg_g_twopixelsize(tpg, p));
 376                         if (blend)
 377                                 blend_line(dev, vid_overlay_y + dev->loop_vid_overlay.top,
 378                                            dev->loop_vid_overlay.left,
 379                                            dev->blended_line + offset, osd,
 380                                            dev->loop_vid_overlay.width, twopixsize / 2);
 381                         else
 382                                 memcpy(dev->blended_line + offset,
 383                                        osd, (dev->loop_vid_overlay.width * twopixsize) / 2);
 384                         scale_line(dev->blended_line, dev->scaled_line,
 385                                         dev->loop_vid_copy.width, dev->loop_vid_cap.width,
 386                                         tpg_g_twopixelsize(tpg, p));
 387                 }
 388                 dev->cur_scaled_line = vid_out_y;
 389                 memcpy(vcapbuf + vid_cap_left, dev->scaled_line,
 390                        tpg_hdiv(tpg, p, dev->loop_vid_cap.width));
 391
 392 update_vid_out_y:
 393                 if (osdline) {
 394                         vid_overlay_y += vid_overlay_int_part;
 395                         vid_overlay_error += vid_overlay_fract_part;
 396                         if (vid_overlay_error >= dev->loop_vid_overlay_cap.height) {
 397                                 vid_overlay_error -= dev->loop_vid_overlay_cap.height;
 398                                 vid_overlay_y++;
 399                         }
 400                 }
 401                 vid_out_y += vid_out_int_part;
 402                 vid_out_error += vid_out_fract_part;
 403                 if (vid_out_error >= dev->loop_vid_cap.height / vdiv) {
 404                         vid_out_error -= dev->loop_vid_cap.height / vdiv;
 405                         vid_out_y++;
 406                 }
 407         }
 408
 409         if (!blank)
 410                 return 0;
 411         for (; y < img_height; y += vdiv, vcapbuf += stride_cap)
 412                 memcpy(vcapbuf, tpg->contrast_line[p], img_width);
 413         return 0;
 414 }
 415
 416 static void vivid_fillbuff(struct vivid_dev *dev, struct vivid_buffer *buf)
 417 {
 418         struct tpg_data *tpg = &dev->tpg;
 419         unsigned factor = V4L2_FIELD_HAS_T_OR_B(dev->field_cap) ? 2 : 1;
 420         unsigned line_height = 16 / factor;
 421         bool is_tv = vivid_is_sdtv_cap(dev);
 422         bool is_60hz = is_tv && (dev->std_cap & V4L2_STD_525_60);
 423         unsigned p;
 424         int line = 1;
 425         u8 *basep[TPG_MAX_PLANES][2];
 426         unsigned ms;
 427         char str[100];
 428         s32 gain;
 429         bool is_loop = false;
 430
 431         if (dev->loop_video && dev->can_loop_video &&
 432             ((vivid_is_svid_cap(dev) && !VIVID_INVALID_SIGNAL(dev->std_signal_mode)) ||
 433              (vivid_is_hdmi_cap(dev) && !VIVID_INVALID_SIGNAL(dev->dv_timings_signal_mode))))
 434                 is_loop = true;
 435
 436         buf->vb.v4l2_buf.sequence = dev->vid_cap_seq_count;
 437         /*
 438          * Take the timestamp now if the timestamp source is set to
 439          * "Start of Exposure".
 440          */
 441         if (dev->tstamp_src_is_soe)
 442                 v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
 443         if (dev->field_cap == V4L2_FIELD_ALTERNATE) {
 444                 /*
 445                  * 60 Hz standards start with the bottom field, 50 Hz standards
 446                  * with the top field. So if the 0-based seq_count is even,
 447                  * then the field is TOP for 50 Hz and BOTTOM for 60 Hz
 448                  * standards.
 449                  */
 450                 buf->vb.v4l2_buf.field = ((dev->vid_cap_seq_count & 1) ^ is_60hz) ?
 451                         V4L2_FIELD_BOTTOM : V4L2_FIELD_TOP;
 452                 /*
 453                  * The sequence counter counts frames, not fields. So divide
 454                  * by two.
 455                  */
 456                 buf->vb.v4l2_buf.sequence /= 2;
 457         } else {
 458                 buf->vb.v4l2_buf.field = dev->field_cap;
 459         }
 460         tpg_s_field(tpg, buf->vb.v4l2_buf.field,
 461                     dev->field_cap == V4L2_FIELD_ALTERNATE);
 462         tpg_s_perc_fill_blank(tpg, dev->must_blank[buf->vb.v4l2_buf.index]);
 463
 464         vivid_precalc_copy_rects(dev);
 465
 466         for (p = 0; p < tpg_g_planes(tpg); p++) {
 467                 void *vbuf = plane_vaddr(tpg, buf, p,
 468                                          tpg->bytesperline, tpg->buf_height);
 469
 470                 /*
 471                  * The first plane of a multiplanar format has a non-zero
 472                  * data_offset. This helps testing whether the application
 473                  * correctly supports non-zero data offsets.
 474                  */
 475                 if (p < tpg_g_buffers(tpg) && dev->fmt_cap->data_offset[p]) {
 476                         memset(vbuf, dev->fmt_cap->data_offset[p] & 0xff,
 477                                dev->fmt_cap->data_offset[p]);
 478                         vbuf += dev->fmt_cap->data_offset[p];
 479                 }
 480                 tpg_calc_text_basep(tpg, basep, p, vbuf);
 481                 if (!is_loop || vivid_copy_buffer(dev, p, vbuf, buf))
 482                         tpg_fill_plane_buffer(tpg, vivid_get_std_cap(dev), p, vbuf);
 483         }
 484         dev->must_blank[buf->vb.v4l2_buf.index] = false;
 485
 486         /* Updates stream time, only update at the start of a new frame. */
 487         if (dev->field_cap != V4L2_FIELD_ALTERNATE || (buf->vb.v4l2_buf.sequence & 1) == 0)
 488                 dev->ms_vid_cap = jiffies_to_msecs(jiffies - dev->jiffies_vid_cap);
 489
 490         ms = dev->ms_vid_cap;
 491         if (dev->osd_mode <= 1) {
 492                 snprintf(str, sizeof(str), " %02d:%02d:%02d:%03d %u%s",
 493                                 (ms / (60 * 60 * 1000)) % 24,
 494                                 (ms / (60 * 1000)) % 60,
 495                                 (ms / 1000) % 60,
 496                                 ms % 1000,
 497                                 buf->vb.v4l2_buf.sequence,
 498                                 (dev->field_cap == V4L2_FIELD_ALTERNATE) ?
 499                                         (buf->vb.v4l2_buf.field == V4L2_FIELD_TOP ?
 500                                          " top" : " bottom") : "");
 501                 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 502         }
 503         if (dev->osd_mode == 0) {
 504                 snprintf(str, sizeof(str), " %dx%d, input %d ",
 505                                 dev->src_rect.width, dev->src_rect.height, dev->input);
 506                 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 507
 508                 gain = v4l2_ctrl_g_ctrl(dev->gain);
 509                 mutex_lock(dev->ctrl_hdl_user_vid.lock);
 510                 snprintf(str, sizeof(str),
 511                         " brightness %3d, contrast %3d, saturation %3d, hue %d ",
 512                         dev->brightness->cur.val,
 513                         dev->contrast->cur.val,
 514                         dev->saturation->cur.val,
 515                         dev->hue->cur.val);
 516                 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 517                 snprintf(str, sizeof(str),
 518                         " autogain %d, gain %3d, alpha 0x%02x ",
 519                         dev->autogain->cur.val, gain, dev->alpha->cur.val);
 520                 mutex_unlock(dev->ctrl_hdl_user_vid.lock);
 521                 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 522                 mutex_lock(dev->ctrl_hdl_user_aud.lock);
 523                 snprintf(str, sizeof(str),
 524                         " volume %3d, mute %d ",
 525                         dev->volume->cur.val, dev->mute->cur.val);
 526                 mutex_unlock(dev->ctrl_hdl_user_aud.lock);
 527                 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 528                 mutex_lock(dev->ctrl_hdl_user_gen.lock);
 529                 snprintf(str, sizeof(str), " int32 %d, int64 %lld, bitmask %08x ",
 530                         dev->int32->cur.val,
 531                         *dev->int64->p_cur.p_s64,
 532                         dev->bitmask->cur.val);
 533                 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 534                 snprintf(str, sizeof(str), " boolean %d, menu %s, string \"%s\" ",
 535                         dev->boolean->cur.val,
 536                         dev->menu->qmenu[dev->menu->cur.val],
 537                         dev->string->p_cur.p_char);
 538                 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 539                 snprintf(str, sizeof(str), " integer_menu %lld, value %d ",
 540                         dev->int_menu->qmenu_int[dev->int_menu->cur.val],
 541                         dev->int_menu->cur.val);
 542                 mutex_unlock(dev->ctrl_hdl_user_gen.lock);
 543                 tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 544                 if (dev->button_pressed) {
 545                         dev->button_pressed--;
 546                         snprintf(str, sizeof(str), " button pressed!");
 547                         tpg_gen_text(tpg, basep, line++ * line_height, 16, str);
 548                 }
 549         }
 550
 551         /*
 552          * If "End of Frame" is specified at the timestamp source, then take
 553          * the timestamp now.
 554          */
 555         if (!dev->tstamp_src_is_soe)
 556                 v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
 557         buf->vb.v4l2_buf.timestamp.tv_sec += dev->time_wrap_offset;
 558 }
 559
 560 /*
 561  * Return true if this pixel coordinate is a valid video pixel.
 562  */
 563 static bool valid_pix(struct vivid_dev *dev, int win_y, int win_x, int fb_y, int fb_x)
 564 {
 565         int i;
 566
 567         if (dev->bitmap_cap) {
 568                 /*
 569                  * Only if the corresponding bit in the bitmap is set can
 570                  * the video pixel be shown. Coordinates are relative to
 571                  * the overlay window set by VIDIOC_S_FMT.
 572                  */
 573                 const u8 *p = dev->bitmap_cap;
 574                 unsigned stride = (dev->compose_cap.width + 7) / 8;
 575
 576                 if (!(p[stride * win_y + win_x / 8] & (1 << (win_x & 7))))
 577                         return false;
 578         }
 579
 580         for (i = 0; i < dev->clipcount_cap; i++) {
 581                 /*
 582                  * Only if the framebuffer coordinate is not in any of the
 583                  * clip rectangles will be video pixel be shown.
 584                  */
 585                 struct v4l2_rect *r = &dev->clips_cap[i].c;
 586
 587                 if (fb_y >= r->top && fb_y < r->top + r->height &&
 588                     fb_x >= r->left && fb_x < r->left + r->width)
 589                         return false;
 590         }
 591         return true;
 592 }
 593
 594 /*
 595  * Draw the image into the overlay buffer.
 596  * Note that the combination of overlay and multiplanar is not supported.
 597  */
 598 static void vivid_overlay(struct vivid_dev *dev, struct vivid_buffer *buf)
 599 {
 600         struct tpg_data *tpg = &dev->tpg;
 601         unsigned pixsize = tpg_g_twopixelsize(tpg, 0) / 2;
 602         void *vbase = dev->fb_vbase_cap;
 603         void *vbuf = vb2_plane_vaddr(&buf->vb, 0);
 604         unsigned img_width = dev->compose_cap.width;
 605         unsigned img_height = dev->compose_cap.height;
 606         unsigned stride = tpg->bytesperline[0];
 607         /* if quick is true, then valid_pix() doesn't have to be called */
 608         bool quick = dev->bitmap_cap == NULL && dev->clipcount_cap == 0;
 609         int x, y, w, out_x = 0;
 610
 611         /*
 612          * Overlay support is only supported for formats that have a twopixelsize
 613          * that's >= 2. Warn and bail out if that's not the case.
 614          */
 615         if (WARN_ON(pixsize == 0))
 616                 return;
 617         if ((dev->overlay_cap_field == V4L2_FIELD_TOP ||
 618              dev->overlay_cap_field == V4L2_FIELD_BOTTOM) &&
 619             dev->overlay_cap_field != buf->vb.v4l2_buf.field)
 620                 return;
 621
 622         vbuf += dev->compose_cap.left * pixsize + dev->compose_cap.top * stride;
 623         x = dev->overlay_cap_left;
 624         w = img_width;
 625         if (x < 0) {
 626                 out_x = -x;
 627                 w = w - out_x;
 628                 x = 0;
 629         } else {
 630                 w = dev->fb_cap.fmt.width - x;
 631                 if (w > img_width)
 632                         w = img_width;
 633         }
 634         if (w <= 0)
 635                 return;
 636         if (dev->overlay_cap_top >= 0)
 637                 vbase += dev->overlay_cap_top * dev->fb_cap.fmt.bytesperline;
 638         for (y = dev->overlay_cap_top;
 639              y < dev->overlay_cap_top + (int)img_height;
 640              y++, vbuf += stride) {
 641                 int px;
 642
 643                 if (y < 0 || y > dev->fb_cap.fmt.height)
 644                         continue;
 645                 if (quick) {
 646                         memcpy(vbase + x * pixsize,
 647                                vbuf + out_x * pixsize, w * pixsize);
 648                         vbase += dev->fb_cap.fmt.bytesperline;
 649                         continue;
 650                 }
 651                 for (px = 0; px < w; px++) {
 652                         if (!valid_pix(dev, y - dev->overlay_cap_top,
 653                                        px + out_x, y, px + x))
 654                                 continue;
 655                         memcpy(vbase + (px + x) * pixsize,
 656                                vbuf + (px + out_x) * pixsize,
 657                                pixsize);
 658                 }
 659                 vbase += dev->fb_cap.fmt.bytesperline;
 660         }
 661 }
 662
 663 static void vivid_thread_vid_cap_tick(struct vivid_dev *dev, int dropped_bufs)
 664 {
 665         struct vivid_buffer *vid_cap_buf = NULL;
 666         struct vivid_buffer *vbi_cap_buf = NULL;
 667
 668         dprintk(dev, 1, "Video Capture Thread Tick\n");
 669
 670         while (dropped_bufs-- > 1)
 671                 tpg_update_mv_count(&dev->tpg,
 672                                 dev->field_cap == V4L2_FIELD_NONE ||
 673                                 dev->field_cap == V4L2_FIELD_ALTERNATE);
 674
 675         /* Drop a certain percentage of buffers. */
 676         if (dev->perc_dropped_buffers &&
 677             prandom_u32_max(100) < dev->perc_dropped_buffers)
 678                 goto update_mv;
 679
 680         spin_lock(&dev->slock);
 681         if (!list_empty(&dev->vid_cap_active)) {
 682                 vid_cap_buf = list_entry(dev->vid_cap_active.next, struct vivid_buffer, list);
 683                 list_del(&vid_cap_buf->list);
 684         }
 685         if (!list_empty(&dev->vbi_cap_active)) {
 686                 if (dev->field_cap != V4L2_FIELD_ALTERNATE ||
 687                     (dev->vbi_cap_seq_count & 1)) {
 688                         vbi_cap_buf = list_entry(dev->vbi_cap_active.next,
 689                                                  struct vivid_buffer, list);
 690                         list_del(&vbi_cap_buf->list);
 691                 }
 692         }
 693         spin_unlock(&dev->slock);
 694
 695         if (!vid_cap_buf && !vbi_cap_buf)
 696                 goto update_mv;
 697
 698         if (vid_cap_buf) {
 699                 /* Fill buffer */
 700                 vivid_fillbuff(dev, vid_cap_buf);
 701                 dprintk(dev, 1, "filled buffer %d\n",
 702                         vid_cap_buf->vb.v4l2_buf.index);
 703
 704                 /* Handle overlay */
 705                 if (dev->overlay_cap_owner && dev->fb_cap.base &&
 706                                 dev->fb_cap.fmt.pixelformat == dev->fmt_cap->fourcc)
 707                         vivid_overlay(dev, vid_cap_buf);
 708
 709                 vb2_buffer_done(&vid_cap_buf->vb, dev->dqbuf_error ?
 710                                 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
 711                 dprintk(dev, 2, "vid_cap buffer %d done\n",
 712                                 vid_cap_buf->vb.v4l2_buf.index);
 713         }
 714
 715         if (vbi_cap_buf) {
 716                 if (dev->stream_sliced_vbi_cap)
 717                         vivid_sliced_vbi_cap_process(dev, vbi_cap_buf);
 718                 else
 719                         vivid_raw_vbi_cap_process(dev, vbi_cap_buf);
 720                 vb2_buffer_done(&vbi_cap_buf->vb, dev->dqbuf_error ?
 721                                 VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
 722                 dprintk(dev, 2, "vbi_cap %d done\n",
 723                                 vbi_cap_buf->vb.v4l2_buf.index);
 724         }
 725         dev->dqbuf_error = false;
 726
 727 update_mv:
 728         /* Update the test pattern movement counters */
 729         tpg_update_mv_count(&dev->tpg, dev->field_cap == V4L2_FIELD_NONE ||
 730                                        dev->field_cap == V4L2_FIELD_ALTERNATE);
 731 }
 732
 733 static int vivid_thread_vid_cap(void *data)
 734 {
 735         struct vivid_dev *dev = data;
 736         u64 numerators_since_start;
 737         u64 buffers_since_start;
 738         u64 next_jiffies_since_start;
 739         unsigned long jiffies_since_start;
 740         unsigned long cur_jiffies;
 741         unsigned wait_jiffies;
 742         unsigned numerator;
 743         unsigned denominator;
 744         int dropped_bufs;
 745
 746         dprintk(dev, 1, "Video Capture Thread Start\n");
 747
 748         set_freezable();
 749
 750         /* Resets frame counters */
 751         dev->cap_seq_offset = 0;
 752         dev->cap_seq_count = 0;
 753         dev->cap_seq_resync = false;
 754         dev->jiffies_vid_cap = jiffies;
 755
 756         for (;;) {
 757                 try_to_freeze();
 758                 if (kthread_should_stop())
 759                         break;
 760
 761                 mutex_lock(&dev->mutex);
 762                 cur_jiffies = jiffies;
 763                 if (dev->cap_seq_resync) {
 764                         dev->jiffies_vid_cap = cur_jiffies;
 765                         dev->cap_seq_offset = dev->cap_seq_count + 1;
 766                         dev->cap_seq_count = 0;
 767                         dev->cap_seq_resync = false;
 768                 }
 769                 numerator = dev->timeperframe_vid_cap.numerator;
 770                 denominator = dev->timeperframe_vid_cap.denominator;
 771
 772                 if (dev->field_cap == V4L2_FIELD_ALTERNATE)
 773                         denominator *= 2;
 774
 775                 /* Calculate the number of jiffies since we started streaming */
 776                 jiffies_since_start = cur_jiffies - dev->jiffies_vid_cap;
 777                 /* Get the number of buffers streamed since the start */
 778                 buffers_since_start = (u64)jiffies_since_start * denominator +
 779                                       (HZ * numerator) / 2;
 780                 do_div(buffers_since_start, HZ * numerator);
 781
 782                 /*
 783                  * After more than 0xf0000000 (rounded down to a multiple of
 784                  * 'jiffies-per-day' to ease jiffies_to_msecs calculation)
 785                  * jiffies have passed since we started streaming reset the
 786                  * counters and keep track of the sequence offset.
 787                  */
 788                 if (jiffies_since_start > JIFFIES_RESYNC) {
 789                         dev->jiffies_vid_cap = cur_jiffies;
 790                         dev->cap_seq_offset = buffers_since_start;
 791                         buffers_since_start = 0;
 792                 }
 793                 dropped_bufs = buffers_since_start + dev->cap_seq_offset - dev->cap_seq_count;
 794                 dev->cap_seq_count = buffers_since_start + dev->cap_seq_offset;
 795                 dev->vid_cap_seq_count = dev->cap_seq_count - dev->vid_cap_seq_start;
 796                 dev->vbi_cap_seq_count = dev->cap_seq_count - dev->vbi_cap_seq_start;
 797
 798                 vivid_thread_vid_cap_tick(dev, dropped_bufs);
 799
 800                 /*
 801                  * Calculate the number of 'numerators' streamed since we started,
 802                  * including the current buffer.
 803                  */
 804                 numerators_since_start = ++buffers_since_start * numerator;
 805
 806                 /* And the number of jiffies since we started */
 807                 jiffies_since_start = jiffies - dev->jiffies_vid_cap;
 808
 809                 mutex_unlock(&dev->mutex);
 810
 811                 /*
 812                  * Calculate when that next buffer is supposed to start
 813                  * in jiffies since we started streaming.
 814                  */
 815                 next_jiffies_since_start = numerators_since_start * HZ +
 816                                            denominator / 2;
 817                 do_div(next_jiffies_since_start, denominator);
 818                 /* If it is in the past, then just schedule asap */
 819                 if (next_jiffies_since_start < jiffies_since_start)
 820                         next_jiffies_since_start = jiffies_since_start;
 821
 822                 wait_jiffies = next_jiffies_since_start - jiffies_since_start;
 823                 schedule_timeout_interruptible(wait_jiffies ? wait_jiffies : 1);
 824         }
 825         dprintk(dev, 1, "Video Capture Thread End\n");
 826         return 0;
 827 }
 828
 829 static void vivid_grab_controls(struct vivid_dev *dev, bool grab)
 830 {
 831         v4l2_ctrl_grab(dev->ctrl_has_crop_cap, grab);
 832         v4l2_ctrl_grab(dev->ctrl_has_compose_cap, grab);
 833         v4l2_ctrl_grab(dev->ctrl_has_scaler_cap, grab);
 834 }
 835
 836 int vivid_start_generating_vid_cap(struct vivid_dev *dev, bool *pstreaming)
 837 {
 838         dprintk(dev, 1, "%s\n", __func__);
 839
 840         if (dev->kthread_vid_cap) {
 841                 u32 seq_count = dev->cap_seq_count + dev->seq_wrap * 128;
 842
 843                 if (pstreaming == &dev->vid_cap_streaming)
 844                         dev->vid_cap_seq_start = seq_count;
 845                 else
 846                         dev->vbi_cap_seq_start = seq_count;
 847                 *pstreaming = true;
 848                 return 0;
 849         }
 850
 851         /* Resets frame counters */
 852         tpg_init_mv_count(&dev->tpg);
 853
 854         dev->vid_cap_seq_start = dev->seq_wrap * 128;
 855         dev->vbi_cap_seq_start = dev->seq_wrap * 128;
 856
 857         dev->kthread_vid_cap = kthread_run(vivid_thread_vid_cap, dev,
 858                         "%s-vid-cap", dev->v4l2_dev.name);
 859
 860         if (IS_ERR(dev->kthread_vid_cap)) {
 861                 v4l2_err(&dev->v4l2_dev, "kernel_thread() failed\n");
 862                 return PTR_ERR(dev->kthread_vid_cap);
 863         }
 864         *pstreaming = true;
 865         vivid_grab_controls(dev, true);
 866
 867         dprintk(dev, 1, "returning from %s\n", __func__);
 868         return 0;
 869 }
 870
 871 void vivid_stop_generating_vid_cap(struct vivid_dev *dev, bool *pstreaming)
 872 {
 873         dprintk(dev, 1, "%s\n", __func__);
 874
 875         if (dev->kthread_vid_cap == NULL)
 876                 return;
 877
 878         *pstreaming = false;
 879         if (pstreaming == &dev->vid_cap_streaming) {
 880                 /* Release all active buffers */
 881                 while (!list_empty(&dev->vid_cap_active)) {
 882                         struct vivid_buffer *buf;
 883
 884                         buf = list_entry(dev->vid_cap_active.next,
 885                                          struct vivid_buffer, list);
 886                         list_del(&buf->list);
 887                         vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
 888                         dprintk(dev, 2, "vid_cap buffer %d done\n",
 889                                 buf->vb.v4l2_buf.index);
 890                 }
 891         }
 892
 893         if (pstreaming == &dev->vbi_cap_streaming) {
 894                 while (!list_empty(&dev->vbi_cap_active)) {
 895                         struct vivid_buffer *buf;
 896
 897                         buf = list_entry(dev->vbi_cap_active.next,
 898                                          struct vivid_buffer, list);
 899                         list_del(&buf->list);
 900                         vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
 901                         dprintk(dev, 2, "vbi_cap buffer %d done\n",
 902                                 buf->vb.v4l2_buf.index);
 903                 }
 904         }
 905
 906         if (dev->vid_cap_streaming || dev->vbi_cap_streaming)
 907                 return;
 908
 909         /* shutdown control thread */
 910         vivid_grab_controls(dev, false);
 911         mutex_unlock(&dev->mutex);
 912         kthread_stop(dev->kthread_vid_cap);
 913         dev->kthread_vid_cap = NULL;
 914         mutex_lock(&dev->mutex);
 915 }