V4L/DVB (13966): DVB-T regression fix for saa7134 cards

Some customers has problem with quality of DVB-T
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/446575

After this patch http://patchwork.kernel.org/patch/23345/

This is patch for fix regression with DVB-T. Tested with many people.

Signed-off-by: Alexey Osipov <lion-simba@pridelands.ru>
Signed-off-by: Beholder Intl. Ltd. Dmitry Belimov <d.belimov@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/media/video/saa7134/saa7134-ts.c b/drivers/media/video/saa7134/saa7134-ts.c
index 03488ba4c99c..b9817d74943f 100644
--- a/drivers/media/video/saa7134/saa7134-ts.c
+++ b/drivers/media/video/saa7134/saa7134-ts.c
@@ -250,6 +250,19 @@ int saa7134_ts_start(struct saa7134_dev *dev)
 
         BUG_ON(dev->ts_started);
 
+        /* dma: setup channel 5 (= TS) */
+        saa_writeb(SAA7134_TS_DMA0, (dev->ts.nr_packets - 1) & 0xff);
+        saa_writeb(SAA7134_TS_DMA1,
+                ((dev->ts.nr_packets - 1) >> 8) & 0xff);
+        /* TSNOPIT=0, TSCOLAP=0 */
+        saa_writeb(SAA7134_TS_DMA2,
+                (((dev->ts.nr_packets - 1) >> 16) & 0x3f) | 0x00);
+        saa_writel(SAA7134_RS_PITCH(5), TS_PACKET_SIZE);
+        saa_writel(SAA7134_RS_CONTROL(5), SAA7134_RS_CONTROL_BURST_16 |
+                                          SAA7134_RS_CONTROL_ME |
+                                          (dev->ts.pt_ts.dma >> 12));
+
+        /* reset hardware TS buffers */
         saa_writeb(SAA7134_TS_SERIAL1, 0x00);
         saa_writeb(SAA7134_TS_SERIAL1, 0x03);
         saa_writeb(SAA7134_TS_SERIAL1, 0x00);