V4L/DVB (13966): DVB-T regression fix for saa7134 cards
Dmitri Belimov [Fri, 8 Jan 2010 09:38:28 +0000 (06:38 -0300)]
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>

drivers/media/video/saa7134/saa7134-core.c
drivers/media/video/saa7134/saa7134-ts.c

index 9f85e91..a7ad781 100644 (file)
@@ -420,19 +420,6 @@ int saa7134_set_dmabits(struct saa7134_dev *dev)
                ctrl |= SAA7134_MAIN_CTRL_TE5;
                irq  |= SAA7134_IRQ1_INTE_RA2_1 |
                        SAA7134_IRQ1_INTE_RA2_0;
-
-               /* 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));
        }
 
        /* set task conditions + field handling */
index 03488ba..b9817d7 100644 (file)
@@ -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);