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Commit 08be64be authored by Dmitri Belimov's avatar Dmitri Belimov Committed by Mauro Carvalho Chehab
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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: default avatarAlexey Osipov <lion-simba@pridelands.ru>
Signed-off-by: default avatarBeholder Intl. Ltd. Dmitry Belimov <d.belimov@gmail.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 423f5c0d

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

+0 −13
Original line number Original line Diff line number Diff line
@@ -420,19 +420,6 @@ int saa7134_set_dmabits(struct saa7134_dev *dev) 
		ctrl |= SAA7134_MAIN_CTRL_TE5;

		ctrl |= SAA7134_MAIN_CTRL_TE5;

		irq  |= SAA7134_IRQ1_INTE_RA2_1 |

		irq  |= SAA7134_IRQ1_INTE_RA2_1 |

			SAA7134_IRQ1_INTE_RA2_0;

			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 */

	/* set task conditions + field handling */

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

+13 −0
Original line number Original line Diff line number Diff line
@@ -250,6 +250,19 @@ int saa7134_ts_start(struct saa7134_dev *dev) 




	BUG_ON(dev->ts_started);

	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, 0x00);

	saa_writeb(SAA7134_TS_SERIAL1, 0x03);

	saa_writeb(SAA7134_TS_SERIAL1, 0x03);

	saa_writeb(SAA7134_TS_SERIAL1, 0x00);

	saa_writeb(SAA7134_TS_SERIAL1, 0x00);