Пример #1
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;	/* 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;
}