diff options
author | Ian Armstrong <ian@iarmst.demon.co.uk> | 2007-10-20 21:52:55 +0400 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-01-26 00:03:10 +0300 |
commit | a3e5f5e2dfb50bebca24329e5377d804c6e3eb1b (patch) | |
tree | 6a900057b715633c5b7951568253f35de2e0a24f /drivers/media/video/ivtv/ivtv-irq.c | |
parent | c240ad00af78228726e6301ad6ffc54d3adce2a0 (diff) | |
download | linux-a3e5f5e2dfb50bebca24329e5377d804c6e3eb1b.tar.xz |
V4L/DVB (6713): ivtv: ivtv_yuv_prep_frame breakup and yuv hardware buffer changes
ivtv_yuv_prep_frame is split in smaller code blocks.
Modified yuv buffer handling on the PVR350 itself. We now cycle through all 8
hardware buffers.
With this patch in place, driver behaviour should remain unchanged from the
existing release.
Signed-off-by: Ian Armstrong <ian@iarmst.demon.co.uk>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/ivtv/ivtv-irq.c')
-rw-r--r-- | drivers/media/video/ivtv/ivtv-irq.c | 31 |
1 files changed, 16 insertions, 15 deletions
diff --git a/drivers/media/video/ivtv/ivtv-irq.c b/drivers/media/video/ivtv/ivtv-irq.c index bcf1c85991af..fc8eac09584c 100644 --- a/drivers/media/video/ivtv/ivtv-irq.c +++ b/drivers/media/video/ivtv/ivtv-irq.c @@ -744,24 +744,25 @@ static void ivtv_irq_vsync(struct ivtv *itv) * one vsync per frame. */ unsigned int frame = read_reg(0x28c0) & 1; + struct yuv_playback_info *yi = &itv->yuv_info; int last_dma_frame = atomic_read(&itv->yuv_info.next_dma_frame); if (0) IVTV_DEBUG_IRQ("DEC VSYNC\n"); - if (((frame ^ itv->yuv_info.sync_field[last_dma_frame]) == 0 && - ((itv->last_vsync_field & 1) ^ itv->yuv_info.sync_field[last_dma_frame])) || - (frame != (itv->last_vsync_field & 1) && !itv->yuv_info.frame_interlaced)) { + if (((frame ^ yi->sync_field[last_dma_frame]) == 0 && + ((itv->last_vsync_field & 1) ^ yi->sync_field[last_dma_frame])) || + (frame != (itv->last_vsync_field & 1) && !yi->frame_interlaced)) { int next_dma_frame = last_dma_frame; - if (!(itv->yuv_info.frame_interlaced && itv->yuv_info.field_delay[next_dma_frame] && itv->yuv_info.fields_lapsed < 1)) { - if (next_dma_frame >= 0 && next_dma_frame != atomic_read(&itv->yuv_info.next_fill_frame)) { + if (!(yi->frame_interlaced && yi->field_delay[next_dma_frame] && yi->fields_lapsed < 1)) { + if (next_dma_frame >= 0 && next_dma_frame != atomic_read(&yi->next_fill_frame)) { write_reg(yuv_offset[next_dma_frame] >> 4, 0x82c); write_reg((yuv_offset[next_dma_frame] + IVTV_YUV_BUFFER_UV_OFFSET) >> 4, 0x830); write_reg(yuv_offset[next_dma_frame] >> 4, 0x834); write_reg((yuv_offset[next_dma_frame] + IVTV_YUV_BUFFER_UV_OFFSET) >> 4, 0x838); - next_dma_frame = (next_dma_frame + 1) & 0x3; - atomic_set(&itv->yuv_info.next_dma_frame, next_dma_frame); - itv->yuv_info.fields_lapsed = -1; + next_dma_frame = (next_dma_frame + 1) % IVTV_YUV_BUFFERS; + atomic_set(&yi->next_dma_frame, next_dma_frame); + yi->fields_lapsed = -1; } } } @@ -794,20 +795,20 @@ static void ivtv_irq_vsync(struct ivtv *itv) } /* Check if we need to update the yuv registers */ - if ((itv->yuv_info.yuv_forced_update || itv->yuv_info.new_frame_info[last_dma_frame].update) && last_dma_frame != -1) { - if (!itv->yuv_info.new_frame_info[last_dma_frame].update) + if ((yi->yuv_forced_update || yi->new_frame_info[last_dma_frame].update) && last_dma_frame != -1) { + if (!yi->new_frame_info[last_dma_frame].update) last_dma_frame = (last_dma_frame - 1) & 3; - if (itv->yuv_info.new_frame_info[last_dma_frame].src_w) { - itv->yuv_info.update_frame = last_dma_frame; - itv->yuv_info.new_frame_info[last_dma_frame].update = 0; - itv->yuv_info.yuv_forced_update = 0; + if (yi->new_frame_info[last_dma_frame].src_w) { + yi->update_frame = last_dma_frame; + yi->new_frame_info[last_dma_frame].update = 0; + yi->yuv_forced_update = 0; set_bit(IVTV_F_I_WORK_HANDLER_YUV, &itv->i_flags); set_bit(IVTV_F_I_HAVE_WORK, &itv->i_flags); } } - itv->yuv_info.fields_lapsed ++; + yi->fields_lapsed++; } } |