Hi Hans, On Mon, Feb 16, 2015 at 9:46 AM, Hans Verkuil <hverkuil@xxxxxxxxx> wrote: > On 02/16/2015 03:39 PM, Devin Heitmueller wrote: >>> Except for PVR-500, I can't remember any case where the same tuner is used >>> more than once. >>> >>> There is the case of a device with two tuners, one for TV and another one >>> for FM. Yet, on such case, the name of the FM tuner will be different, >>> anyway. So, I don't think this is a current issue, but if the name should >>> be unique, then we need to properly document it. >> >> Perhaps I've misunderstood the comment, but HVR-2200/2250 and numerous >> dib0700 designs are dual DVB tuners. Neither are like the PVR-500 in >> that they are a single entity with two tuners (as opposed to the >> PVR-500 which is two PCI devices which happen to be on the same PCB). > > DVB, yes, but not analog (V4L2) tuners. For DVB tuners the frontend name > is used as the entity name, which I assumed is unique. It is, right? If > that's not unique, then the same issue is there as well. I have ordered > a dual DVB-T board, but I won't have that for another two weeks. Sorry, I thought this patch was related to the DVB tuner subdev - didn't realize it was for tuner-core (which is obviously analog). The HVR-2200/2250 is a single board with dual hybrid tuners (model 2200 has a DVB-T demod and 2250 has an ATSC demod). In other words, it has two tuners, each of which can be independently tuned to either digital or analog signals. And unlike the PVR-500, it's a single PCIe bridge (saa7164). Regarding your question on DVB tuners, yes - each tuner gets its own frontendX device node (in reality the frontendX points to the digital demodulator, but ultimately it passes the tuning request off to the tuner as well). Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com -- 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
