merge: v4l-dvb

From: Antoine Jacquet <royale@zerezo.com>

Priority: normal

Signed-off-by: Antoine Jacquet <royale@zerezo.com>

1 files changed, 8 insertions, 21 deletions

diff --git a/linux/drivers/media/video/ivtv/ivtv-irq.c b/linux/drivers/media/video/ivtv/ivtv-irq.c
index d5ac766c1..59fe56171 100644
--- a/linux/drivers/media/video/ivtv/ivtv-irq.c
+++ b/linux/drivers/media/video/ivtv/ivtv-irq.c
@@ -82,6 +82,13 @@ void ivtv_irq_work_handler(void *arg)
 
 	DEFINE_WAIT(wait);
 
+	if (test_and_clear_bit(IVTV_F_I_WORK_INITED, &itv->i_flags)) {
+		struct sched_param param = { .sched_priority = 99 };
+
+		/* This thread must use the FIFO scheduler as it
+		   is realtime sensitive. */
+		sched_setscheduler(current, SCHED_FIFO, &param);
+	}
 	if (test_and_clear_bit(IVTV_F_I_WORK_HANDLER_PIO, &itv->i_flags))
 		ivtv_pio_work_handler(itv);
 
@@ -684,34 +691,14 @@ static void ivtv_irq_enc_start_cap(struct ivtv *itv)
 
 static void ivtv_irq_enc_vbi_cap(struct ivtv *itv)
 {
-	struct ivtv_stream *s_mpg = &itv->streams[IVTV_ENC_STREAM_TYPE_MPG];
 	u32 data[CX2341X_MBOX_MAX_DATA];
 	struct ivtv_stream *s;
 
 	IVTV_DEBUG_HI_IRQ("ENC START VBI CAP\n");
 	s = &itv->streams[IVTV_ENC_STREAM_TYPE_VBI];
 
-	/* If more than two VBI buffers are pending, then
-	   clear the old ones and start with this new one.
-	   This can happen during transition stages when MPEG capturing is
-	   started, but the first interrupts haven't arrived yet. During
-	   that period VBI requests can accumulate without being able to
-	   DMA the data. Since at most four VBI DMA buffers are available,
-	   we just drop the old requests when there are already three
-	   requests queued. */
-	if (s->sg_pending_size > 2) {
-		struct ivtv_buffer *buf;
-		list_for_each_entry(buf, &s->q_predma.list, list)
-			ivtv_buf_sync_for_cpu(s, buf);
-		ivtv_queue_move(s, &s->q_predma, NULL, &s->q_free, 0);
-		s->sg_pending_size = 0;
-	}
-	/* if we can append the data, and the MPEG stream isn't capturing,
-	   then start a DMA request for just the VBI data. */
-	if (!stream_enc_dma_append(s, data) &&
-			!test_bit(IVTV_F_S_STREAMING, &s_mpg->s_flags)) {
+	if (!stream_enc_dma_append(s, data))
 		set_bit(ivtv_use_pio(s) ? IVTV_F_S_PIO_PENDING : IVTV_F_S_DMA_PENDING, &s->s_flags);
-	}
 }
 
 static void ivtv_irq_dec_vbi_reinsert(struct ivtv *itv)