-#if 0 /* overlay support not finished yet */
-static u32* ov_risc_field(struct cx8800_dev *dev, struct cx8800_fh *fh,
- u32 *rp, struct btcx_skiplist *skips,
- u32 sync_line, int skip_even, int skip_odd)
-{
- int line,maxy,start,end,skip,nskips;
- u32 ri,ra;
- u32 addr;
-
- /* sync instruction */
- *(rp++) = cpu_to_le32(RISC_RESYNC | sync_line);
-
- addr = (unsigned long)dev->fbuf.base;
- addr += dev->fbuf.fmt.bytesperline * fh->win.w.top;
- addr += (fh->fmt->depth >> 3) * fh->win.w.left;
-
- /* scan lines */
- for (maxy = -1, line = 0; line < fh->win.w.height;
- line++, addr += dev->fbuf.fmt.bytesperline) {
- if ((line%2) == 0 && skip_even)
- continue;
- if ((line%2) == 1 && skip_odd)
- continue;
-
- /* calculate clipping */
- if (line > maxy)
- btcx_calc_skips(line, fh->win.w.width, &maxy,
- skips, &nskips, fh->clips, fh->nclips);
-
- /* write out risc code */
- for (start = 0, skip = 0; start < fh->win.w.width; start = end) {
- if (skip >= nskips) {
- ri = RISC_WRITE;
- end = fh->win.w.width;
- } else if (start < skips[skip].start) {
- ri = RISC_WRITE;
- end = skips[skip].start;
- } else {
- ri = RISC_SKIP;
- end = skips[skip].end;
- skip++;
- }
- if (RISC_WRITE == ri)
- ra = addr + (fh->fmt->depth>>3)*start;
- else
- ra = 0;
-
- if (0 == start)
- ri |= RISC_SOL;
- if (fh->win.w.width == end)
- ri |= RISC_EOL;
- ri |= (fh->fmt->depth>>3) * (end-start);
-
- *(rp++)=cpu_to_le32(ri);
- if (0 != ra)
- *(rp++)=cpu_to_le32(ra);
- }
- }
- kfree(skips);
- return rp;
-}
-
-static int ov_risc_frame(struct cx8800_dev *dev, struct cx8800_fh *fh,
- struct cx88_buffer *buf)
-{
- struct btcx_skiplist *skips;
- u32 instructions,fields;
- u32 *rp;
- int rc;
-
- /* skip list for window clipping */
- if (NULL == (skips = kmalloc(sizeof(*skips) * fh->nclips,GFP_KERNEL)))
- return -ENOMEM;
-
- fields = 0;
- if (V4L2_FIELD_HAS_TOP(fh->win.field))
- fields++;
- if (V4L2_FIELD_HAS_BOTTOM(fh->win.field))
- fields++;
-
- /* estimate risc mem: worst case is (clip+1) * lines instructions
- + syncs + jump (all 2 dwords) */
- instructions = (fh->nclips+1) * fh->win.w.height;
- instructions += 3 + 4;
- if ((rc = btcx_riscmem_alloc(dev->pci,&buf->risc,instructions*8)) < 0) {
- kfree(skips);
- return rc;
- }
-
- /* write risc instructions */
- rp = buf->risc.cpu;
- switch (fh->win.field) {
- case V4L2_FIELD_TOP:
- rp = ov_risc_field(dev, fh, rp, skips, 0, 0, 0);
- break;
- case V4L2_FIELD_BOTTOM:
- rp = ov_risc_field(dev, fh, rp, skips, 0x200, 0, 0);
- break;
- case V4L2_FIELD_INTERLACED:
- rp = ov_risc_field(dev, fh, rp, skips, 0, 0, 1);
- rp = ov_risc_field(dev, fh, rp, skips, 0x200, 1, 0);
- break;
- default:
- BUG();
- }
-
- /* save pointer to jmp instruction address */
- buf->risc.jmp = rp;
- kfree(skips);
- return 0;
-}
-
-static int verify_window(struct cx8800_dev *dev, struct v4l2_window *win)
-{
- enum v4l2_field field;
- int maxw, maxh;
-
- if (NULL == dev->fbuf.base)
- return -EINVAL;
- if (win->w.width < 48 || win->w.height < 32)
- return -EINVAL;
- if (win->clipcount > 2048)
- return -EINVAL;
-
- field = win->field;
- maxw = norm_maxw(core->tvnorm);
- maxh = norm_maxh(core->tvnorm);
-
- if (V4L2_FIELD_ANY == field) {
- field = (win->w.height > maxh/2)
- ? V4L2_FIELD_INTERLACED
- : V4L2_FIELD_TOP;
- }
- switch (field) {
- case V4L2_FIELD_TOP:
- case V4L2_FIELD_BOTTOM:
- maxh = maxh / 2;
- break;
- case V4L2_FIELD_INTERLACED:
- break;
- default:
- return -EINVAL;
- }
-
- win->field = field;
- if (win->w.width > maxw)
- win->w.width = maxw;
- if (win->w.height > maxh)
- win->w.height = maxh;
- return 0;
-}
-
-static int setup_window(struct cx8800_dev *dev, struct cx8800_fh *fh,
- struct v4l2_window *win)
-{
- struct v4l2_clip *clips = NULL;
- int n,size,retval = 0;
-
- if (NULL == fh->fmt)
- return -EINVAL;
- retval = verify_window(dev,win);
- if (0 != retval)
- return retval;
-
- /* copy clips -- luckily v4l1 + v4l2 are binary
- compatible here ...*/
- n = win->clipcount;
- size = sizeof(*clips)*(n+4);
- clips = kmalloc(size,GFP_KERNEL);
- if (NULL == clips)
- return -ENOMEM;
- if (n > 0) {
- if (copy_from_user(clips,win->clips,sizeof(struct v4l2_clip)*n)) {
- kfree(clips);
- return -EFAULT;
- }
- }
-
- /* clip against screen */
- if (NULL != dev->fbuf.base)
- n = btcx_screen_clips(dev->fbuf.fmt.width, dev->fbuf.fmt.height,
- &win->w, clips, n);
- btcx_sort_clips(clips,n);
-
- /* 4-byte alignments */
- switch (fh->fmt->depth) {
- case 8:
- case 24:
- btcx_align(&win->w, clips, n, 3);
- break;
- case 16:
- btcx_align(&win->w, clips, n, 1);
- break;
- case 32:
- /* no alignment fixups needed */
- break;
- default:
- BUG();
- }
-
- down(&fh->vidq.lock);
- if (fh->clips)
- kfree(fh->clips);
- fh->clips = clips;
- fh->nclips = n;
- fh->win = *win;
-#if 0
- fh->ov.setup_ok = 1;
-#endif
-
- /* update overlay if needed */
- retval = 0;
-#if 0
- if (check_btres(fh, RESOURCE_OVERLAY)) {
- struct bttv_buffer *new;
-
- new = videobuf_alloc(sizeof(*new));
- bttv_overlay_risc(btv, &fh->ov, fh->ovfmt, new);
- retval = bttv_switch_overlay(btv,fh,new);
- }
-#endif
- up(&fh->vidq.lock);
- return retval;
-}
-#endif