int ivtv_start_v4l2_decode_stream(struct ivtv_stream *s, int gop_offset)
{
struct ivtv *itv = s->itv;
int rc;
if (s->vdev == NULL)
return -EINVAL;
if (test_and_set_bit(IVTV_F_S_STREAMING, &s->s_flags))
return 0; /* already started */
IVTV_DEBUG_INFO("Starting decode stream %s (gop_offset %d)\n", s->name, gop_offset);
rc = ivtv_setup_v4l2_decode_stream(s);
if (rc < 0) {
clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
return rc;
}
/* set dma size to 65536 bytes */
ivtv_vapi(itv, CX2341X_DEC_SET_DMA_BLOCK_SIZE, 1, 65536);
/* Clear Streamoff */
clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
/* Zero out decoder counters */
writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA_END].data[0]);
writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA_END].data[1]);
writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA_END].data[2]);
writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA_END].data[3]);
writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA].data[0]);
writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA].data[1]);
writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA].data[2]);
writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA].data[3]);
/* turn on notification of dual/stereo mode change */
ivtv_vapi(itv, CX2341X_DEC_SET_EVENT_NOTIFICATION, 4, 0, 1, IVTV_IRQ_DEC_AUD_MODE_CHG, -1);
/* start playback */
ivtv_vapi(itv, CX2341X_DEC_START_PLAYBACK, 2, gop_offset, 0);
/* Let things settle before we actually start */
ivtv_msleep_timeout(10, 0);
/* Clear the following Interrupt mask bits for decoding */
ivtv_clear_irq_mask(itv, IVTV_IRQ_MASK_DECODE);
IVTV_DEBUG_IRQ("IRQ Mask is now: 0x%08x\n", itv->irqmask);
/* you're live! sit back and await interrupts :) */
atomic_inc(&itv->decoding);
return 0;
}
int ivtv_start_v4l2_decode_stream(struct ivtv_stream *s, int gop_offset)
{
struct ivtv *itv = s->itv;
int rc;
if (s->vdev == NULL)
return -EINVAL;
if (test_and_set_bit(IVTV_F_S_STREAMING, &s->s_flags))
return 0; /* */
IVTV_DEBUG_INFO("Starting decode stream %s (gop_offset %d)\n", s->name, gop_offset);
rc = ivtv_setup_v4l2_decode_stream(s);
if (rc < 0) {
clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
return rc;
}
/* */
ivtv_vapi(itv, CX2341X_DEC_SET_DMA_BLOCK_SIZE, 1, 65536);
/* */
clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
/* */
writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA_END].data[0]);
writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA_END].data[1]);
writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA_END].data[2]);
writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA_END].data[3]);
writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA].data[0]);
writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA].data[1]);
writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA].data[2]);
writel(0, &itv->dec_mbox.mbox[IVTV_MBOX_DMA].data[3]);
/* */
ivtv_vapi(itv, CX2341X_DEC_SET_EVENT_NOTIFICATION, 4, 0, 1, IVTV_IRQ_DEC_AUD_MODE_CHG, -1);
/* */
ivtv_vapi(itv, CX2341X_DEC_START_PLAYBACK, 2, gop_offset, 0);
/* */
ivtv_msleep_timeout(10, 0);
/* */
ivtv_clear_irq_mask(itv, IVTV_IRQ_MASK_DECODE);
IVTV_DEBUG_IRQ("IRQ Mask is now: 0x%08x\n", itv->irqmask);
/* */
atomic_inc(&itv->decoding);
return 0;
}