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path: root/drivers/media/video/ivtv/ivtv-yuv.c
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Diffstat (limited to 'drivers/media/video/ivtv/ivtv-yuv.c')
-rw-r--r--drivers/media/video/ivtv/ivtv-yuv.c58
1 files changed, 51 insertions, 7 deletions
diff --git a/drivers/media/video/ivtv/ivtv-yuv.c b/drivers/media/video/ivtv/ivtv-yuv.c
index cd42db9b5a1..711ce5b5a20 100644
--- a/drivers/media/video/ivtv/ivtv-yuv.c
+++ b/drivers/media/video/ivtv/ivtv-yuv.c
@@ -1035,17 +1035,11 @@ void ivtv_yuv_frame_complete(struct ivtv *itv)
(itv->yuv_info.draw_frame + 1) % IVTV_YUV_BUFFERS);
}
-int ivtv_yuv_prep_frame(struct ivtv *itv, struct ivtv_dma_frame *args)
+int ivtv_yuv_udma_frame(struct ivtv *itv, struct ivtv_dma_frame *args)
{
DEFINE_WAIT(wait);
int rc = 0;
int got_sig = 0;
-
- IVTV_DEBUG_INFO("yuv_prep_frame\n");
-
- ivtv_yuv_next_free(itv);
- ivtv_yuv_setup_frame(itv, args);
-
/* DMA the frame */
mutex_lock(&itv->udma.lock);
@@ -1084,6 +1078,56 @@ int ivtv_yuv_prep_frame(struct ivtv *itv, struct ivtv_dma_frame *args)
return rc;
}
+/* Setup frame according to V4L2 parameters */
+void ivtv_yuv_setup_stream_frame(struct ivtv *itv)
+{
+ struct yuv_playback_info *yi = &itv->yuv_info;
+ struct ivtv_dma_frame dma_args;
+
+ ivtv_yuv_next_free(itv);
+
+ /* Copy V4L2 parameters to an ivtv_dma_frame struct... */
+ dma_args.y_source = 0L;
+ dma_args.uv_source = 0L;
+ dma_args.src.left = 0;
+ dma_args.src.top = 0;
+ dma_args.src.width = yi->v4l2_src_w;
+ dma_args.src.height = yi->v4l2_src_h;
+ dma_args.dst = yi->main_rect;
+ dma_args.src_width = yi->v4l2_src_w;
+ dma_args.src_height = yi->v4l2_src_h;
+
+ /* ... and use the same setup routine as ivtv_yuv_prep_frame */
+ ivtv_yuv_setup_frame(itv, &dma_args);
+
+ if (!itv->dma_data_req_offset)
+ itv->dma_data_req_offset = yuv_offset[yi->draw_frame];
+}
+
+/* Attempt to dma a frame from a user buffer */
+int ivtv_yuv_udma_stream_frame(struct ivtv *itv, void *src)
+{
+ struct yuv_playback_info *yi = &itv->yuv_info;
+ struct ivtv_dma_frame dma_args;
+
+ ivtv_yuv_setup_stream_frame(itv);
+
+ /* We only need to supply source addresses for this */
+ dma_args.y_source = src;
+ dma_args.uv_source = src + 720 * ((yi->v4l2_src_h + 31) & ~31);
+ return ivtv_yuv_udma_frame(itv, &dma_args);
+}
+
+/* IVTV_IOC_DMA_FRAME ioctl handler */
+int ivtv_yuv_prep_frame(struct ivtv *itv, struct ivtv_dma_frame *args)
+{
+ IVTV_DEBUG_INFO("yuv_prep_frame\n");
+
+ ivtv_yuv_next_free(itv);
+ ivtv_yuv_setup_frame(itv, args);
+ return ivtv_yuv_udma_frame(itv, args);
+}
+
void ivtv_yuv_close(struct ivtv *itv)
{
int h_filter, v_filter_1, v_filter_2;