Em 14-10-2011 10:28, Devin Heitmueller escreveu: > On Fri, Oct 14, 2011 at 9:19 AM, Mauro Carvalho Chehab > <mchehab@xxxxxxxxxx> wrote: >>> While the basic chips used are different, they are completely >>> different hardware designs and likely have different GPIO >>> configurations as well as IF specs. >> >> The IF settings for xc5000 with DRX-K are solved with this patch: >> http://patchwork.linuxtv.org/patch/7932/ >> >> Basically, DRX-K will use whatever IF the tuner uses. > > While I fundamentally disagree with this change, I'm not going to nack > it. That said, this wasn't the issue I was concerned with. My > suggestion was simply that you cannot assume that all devices that > happen to have a particular demod and tuner combo will always use the > same IF configuration. The PCB layout can effect the optimal IF. > > This is one of those things that (like many tuners in the LinuxTV > tree) will probably work good enough to get a signal lock for whoever > added the board profile, but will result in poor tuning performance > (and a failure to work in less-than-ideal reception conditions). This patch doesn't prevent customizing the IF. It will just avoid the need of setting the IF on both xc5000 and drx-k. Basically, (some) DRX-K based boards use different IF's depending on the bandwidth and delivery system type. Instead of adding a complex logic that would allow such kind of IF adjustments on both, drx-k will simply inquire the tuner about what IF is currently used. > > All that said, if somebody actually intends to hack on it, I can look > up what the correct IF is for the 520e. > > Devin > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
