Johannes Stezenbach wrote: >On Sat, Sep 03, 2005 Jyrki Niskala wrote: > > >>This patch gives better performance when using high frequencies (over >>470 MHz). I got those new >>charge pump values by i2c-snooping windows drivers. >> >> >... > > >>--- dvb-kernel/linux/drivers/media/dvb/bt8xx/org-dvb-bt8xx.c >>2005-09-03 19:21:55.000000000 +0200 >>+++ dvb-kernel/linux/drivers/media/dvb/bt8xx/dvb-bt8xx.c >>2005-09-03 19:23:11.000000000 +0200 >>@@ -264,10 +264,10 @@ >> cpump = 1; >> else if (params->frequency < 470000000) >> cpump = 2; >>- else if (params->frequency < 750000000) >>- cpump = 2; >>- else >>- cpump = 3; >>+ else if (params->frequency < 750000000) >>+ cpump = 0x40; >>+ else >>+ cpump = 0xc0; >> >> if (params->frequency < 175000000) >> band_select = 0x0e; >> >> > >Hm, that's not the real fix, there seems to be another bug. >Can you try the following patch: > > >--- linux/drivers/media/dvb/bt8xx/dvb-bt8xx.c 10 Sep 2005 07:26:02 -0000 1.49 >+++ linux/drivers/media/dvb/bt8xx/dvb-bt8xx.c 10 Sep 2005 16:52:52 -0000 >@@ -280,7 +280,7 @@ static int microtune_mt7202dtf_pll_set(s > data[0] = (div >> 8) & 0x7f; > data[1] = div & 0xff; > data[2] = ((div >> 10) & 0x60) | cfg; >- data[3] = cpump | band_select; >+ data[3] = (cpump << 6) | band_select; > > i2c_transfer(card->i2c_adapter, &msg, 1); > return (div * 166666 - 36000000); > >Additionally the Windows driver seems to use slightly >different charge pump settings (1 vs. 2 in the 470...750MHz range), >can you test which one actually works better? > >Thanks, >Johannes > > > I think your patch affects all frequencies, i have only 4 mux from 538 MHz to 778 MHz to test on. But I will give it a go asap. By the way, this is my i2c log, it may be a outdated windows driver since the log is from april 2004 ;-) Milksop GPL Reflasher - 0.20 - (c)2002 andy@xxxxxxxxxxx ... ### zap to TV3 @ 706 MHz: 405uS: 70 W 02 06 00 01 . . . 690uS: 60 W 11 64 88 43 d . C 627uS: 70 W 0C 18 . 356uS: 70 r 00 0D . 433uS: 70 W 02 06 00 00 . . . ### zap to TV4 @ 746 MHz: 432uS: 70 W 02 06 00 01 . . . 636uS: 60 W 12 54 88 43 T . C 612uS: 70 W 0C 18 . 374uS: 70 r 00 0D . 463uS: 70 W 02 06 00 00 . . . ### zap to SVT1 @ 778 MHz: 400uS: 70 W 02 06 00 01 . . . 606uS: 60 W 13 14 88 C3 . . . 605uS: 70 W 0C 18 . 378uS: 70 r 00 0D . 397uS: 70 W 02 06 00 00 . . . #### zap to ZTV @ 538 MHz: 403uS: 70 W 02 06 00 01 . . . 646uS: 60 W 0D 74 88 43 t . C 629uS: 70 W 0C 18 . 358uS: 70 r 00 0D . 422uS: 70 W 02 06 00 00 . . . ... / Jyrki
