diff options
| author | Steven Toth <stoth@kernellabs.com> | 2011-04-06 15:32:56 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-05-20 16:28:43 +0400 |
| commit | b7101de3fff596b35e45cd9fb7007caa07e97c9a (patch) | |
| tree | 1c11baca827c290a1e312180204e8dc0472eabb9 /drivers/media/video/cx18/cx18-streams.c | |
| parent | 5ed9bd02444a00bb1e8ecc1baa8ecdb633afc126 (diff) | |
| download | linux-b7101de3fff596b35e45cd9fb7007caa07e97c9a.tar.xz | |
[media] cx18: mmap() support for raw YUV video capture
Add support for mmap method streaming of raw YUV video on cx18-based
hardware, in addition to the existing support for read() streaming of
raw YUV and MPEG-2 encoded video.
[simon.farnsworth@onelan.co.uk: I forward-ported this from Steven's original work,
done under contract to ONELAN. The original code is at
http://www.kernellabs.com/hg/~stoth/cx18-videobuf]
Signed-off-by: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Simon Farnsworth <simon.farnsworth@onelan.co.uk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/cx18/cx18-streams.c')
| -rw-r--r-- | drivers/media/video/cx18/cx18-streams.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/media/video/cx18/cx18-streams.c b/drivers/media/video/cx18/cx18-streams.c index 6fbc356113c1..eeb455a8b726 100644 --- a/drivers/media/video/cx18/cx18-streams.c +++ b/drivers/media/video/cx18/cx18-streams.c @@ -44,6 +44,7 @@ static struct v4l2_file_operations cx18_v4l2_enc_fops = { .unlocked_ioctl = cx18_v4l2_ioctl, .release = cx18_v4l2_close, .poll = cx18_v4l2_enc_poll, + .mmap = cx18_v4l2_mmap, }; /* offset from 0 to register ts v4l2 minors on */ @@ -132,6 +133,15 @@ static void cx18_stream_init(struct cx18 *cx, int type) cx18_queue_init(&s->q_idle); INIT_WORK(&s->out_work_order, cx18_out_work_handler); + + INIT_LIST_HEAD(&s->vb_capture); + s->vb_timeout.function = cx18_vb_timeout; + s->vb_timeout.data = (unsigned long)s; + init_timer(&s->vb_timeout); + spin_lock_init(&s->vb_lock); + + /* Assume the previous pixel default */ + s->pixelformat = V4L2_PIX_FMT_HM12; } static int cx18_prep_dev(struct cx18 *cx, int type) @@ -729,6 +739,19 @@ int cx18_start_v4l2_encode_stream(struct cx18_stream *s) test_bit(CX18_F_I_RADIO_USER, &cx->i_flags)) cx18_vapi(cx, CX18_CPU_SET_VIDEO_MUTE, 2, s->handle, (v4l2_ctrl_g_ctrl(cx->cxhdl.video_mute_yuv) << 8) | 1); + + /* Enable the Video Format Converter for UYVY 4:2:2 support, + * rather than the default HM12 Macroblovk 4:2:0 support. + */ + if (captype == CAPTURE_CHANNEL_TYPE_YUV) { + if (s->pixelformat == V4L2_PIX_FMT_YUYV) + cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2, + s->handle, 1); + else + /* If in doubt, default to HM12 */ + cx18_vapi(cx, CX18_CPU_SET_VFC_PARAM, 2, + s->handle, 0); + } } if (atomic_read(&cx->tot_capturing) == 0) { |