diff options
Diffstat (limited to 'drivers/media/video/cx18/cx18-streams.c')
| -rw-r--r-- | drivers/media/video/cx18/cx18-streams.c | 177 |
1 files changed, 176 insertions, 1 deletions
diff --git a/drivers/media/video/cx18/cx18-streams.c b/drivers/media/video/cx18/cx18-streams.c index 6fbc356113c..852f420fd27 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 */ @@ -97,6 +98,141 @@ static struct { }, }; + +void cx18_dma_free(struct videobuf_queue *q, + struct cx18_stream *s, struct cx18_videobuf_buffer *buf) +{ + videobuf_waiton(q, &buf->vb, 0, 0); + videobuf_vmalloc_free(&buf->vb); + buf->vb.state = VIDEOBUF_NEEDS_INIT; +} + +static int cx18_prepare_buffer(struct videobuf_queue *q, + struct cx18_stream *s, + struct cx18_videobuf_buffer *buf, + u32 pixelformat, + unsigned int width, unsigned int height, + enum v4l2_field field) +{ + struct cx18 *cx = s->cx; + int rc = 0; + + /* check settings */ + buf->bytes_used = 0; + + if ((width < 48) || (height < 32)) + return -EINVAL; + + buf->vb.size = (width * height * 2); + if ((buf->vb.baddr != 0) && (buf->vb.bsize < buf->vb.size)) + return -EINVAL; + + /* alloc + fill struct (if changed) */ + if (buf->vb.width != width || buf->vb.height != height || + buf->vb.field != field || s->pixelformat != pixelformat || + buf->tvnorm != cx->std) { + + buf->vb.width = width; + buf->vb.height = height; + buf->vb.field = field; + buf->tvnorm = cx->std; + s->pixelformat = pixelformat; + + cx18_dma_free(q, s, buf); + } + + if ((buf->vb.baddr != 0) && (buf->vb.bsize < buf->vb.size)) + return -EINVAL; + + if (buf->vb.field == 0) + buf->vb.field = V4L2_FIELD_INTERLACED; + + if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { + buf->vb.width = width; + buf->vb.height = height; + buf->vb.field = field; + buf->tvnorm = cx->std; + s->pixelformat = pixelformat; + + rc = videobuf_iolock(q, &buf->vb, NULL); + if (rc != 0) + goto fail; + } + buf->vb.state = VIDEOBUF_PREPARED; + return 0; + +fail: + cx18_dma_free(q, s, buf); + return rc; + +} + +/* VB_MIN_BUFSIZE is lcm(1440 * 480, 1440 * 576) + 1440 is a single line of 4:2:2 YUV at 720 luma samples wide +*/ +#define VB_MIN_BUFFERS 32 +#define VB_MIN_BUFSIZE 4147200 + +static int buffer_setup(struct videobuf_queue *q, + unsigned int *count, unsigned int *size) +{ + struct cx18_stream *s = q->priv_data; + struct cx18 *cx = s->cx; + + *size = 2 * cx->cxhdl.width * cx->cxhdl.height; + if (*count == 0) + *count = VB_MIN_BUFFERS; + + while (*size * *count > VB_MIN_BUFFERS * VB_MIN_BUFSIZE) + (*count)--; + + q->field = V4L2_FIELD_INTERLACED; + q->last = V4L2_FIELD_INTERLACED; + + return 0; +} + +static int buffer_prepare(struct videobuf_queue *q, + struct videobuf_buffer *vb, + enum v4l2_field field) +{ + struct cx18_videobuf_buffer *buf = + container_of(vb, struct cx18_videobuf_buffer, vb); + struct cx18_stream *s = q->priv_data; + struct cx18 *cx = s->cx; + + return cx18_prepare_buffer(q, s, buf, s->pixelformat, + cx->cxhdl.width, cx->cxhdl.height, field); +} + +static void buffer_release(struct videobuf_queue *q, + struct videobuf_buffer *vb) +{ + struct cx18_videobuf_buffer *buf = + container_of(vb, struct cx18_videobuf_buffer, vb); + struct cx18_stream *s = q->priv_data; + + cx18_dma_free(q, s, buf); +} + +static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb) +{ + struct cx18_videobuf_buffer *buf = + container_of(vb, struct cx18_videobuf_buffer, vb); + struct cx18_stream *s = q->priv_data; + + buf->vb.state = VIDEOBUF_QUEUED; + + list_add_tail(&buf->vb.queue, &s->vb_capture); +} + +static struct videobuf_queue_ops cx18_videobuf_qops = { + .buf_setup = buffer_setup, + .buf_prepare = buffer_prepare, + .buf_queue = buffer_queue, + .buf_release = buffer_release, +}; + static void cx18_stream_init(struct cx18 *cx, int type) { struct cx18_stream *s = &cx->streams[type]; @@ -132,6 +268,26 @@ 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); + if (type == CX18_ENC_STREAM_TYPE_YUV) { + spin_lock_init(&s->vbuf_q_lock); + + s->vb_type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + videobuf_queue_vmalloc_init(&s->vbuf_q, &cx18_videobuf_qops, + &cx->pci_dev->dev, &s->vbuf_q_lock, + V4L2_BUF_TYPE_VIDEO_CAPTURE, + V4L2_FIELD_INTERLACED, + sizeof(struct cx18_videobuf_buffer), + s, &cx->serialize_lock); + + /* Assume the previous pixel default */ + s->pixelformat = V4L2_PIX_FMT_HM12; + } } static int cx18_prep_dev(struct cx18 *cx, int type) @@ -372,6 +528,9 @@ void cx18_streams_cleanup(struct cx18 *cx, int unregister) if (vdev == NULL) continue; + if (type == CX18_ENC_STREAM_TYPE_YUV) + videobuf_mmap_free(&cx->streams[type].vbuf_q); + cx18_stream_free(&cx->streams[type]); /* Unregister or release device */ @@ -581,7 +740,10 @@ static void cx18_stream_configure_mdls(struct cx18_stream *s) * Set the MDL size to the exact size needed for one frame. * Use enough buffers per MDL to cover the MDL size */ - s->mdl_size = 720 * s->cx->cxhdl.height * 3 / 2; + if (s->pixelformat == V4L2_PIX_FMT_HM12) + s->mdl_size = 720 * s->cx->cxhdl.height * 3 / 2; + else + s->mdl_size = 720 * s->cx->cxhdl.height * 2; s->bufs_per_mdl = s->mdl_size / s->buf_size; if (s->mdl_size % s->buf_size) s->bufs_per_mdl++; @@ -729,6 +891,19 @@ 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_UYVY) + 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) { |