Am Freitag, 26. Dezember 2008 19:08:29 schrieb Devin Heitmueller: > On Fri, Dec 26, 2008 at 6:10 PM, Andy Walls <awalls@xxxxxxxxx> wrote: > > On Fri, 2008-12-26 at 16:48 -0500, Devin Heitmueller wrote: > >> Hello, > >> > >> I working on the analog support for the Pinnacle Ultimate 880e > >> support, and that device includes an mxl5005s tuner. > >> > >> I went to do the normal changes to em28xx to support another > >> tuner, which prompted me to wonder: > >> > >> Is the analog support known to to work in Linux for this tuner for > >> any other device? > >> > >> The reason I ask is because I hit an oops and when I looked at the > >> source I found some suspicious things: > >> > >> * No entry in tuner.h > >> * No attach command in tuner-core.c > >> * No definition of set_analog_params() callback in mxl5005s.c > > > > The mxl5005s support was added to the v4l-dvb repo by Steven Toth > > for the HVR-1600 which uses it exclusively for ATSC (QAM and > > 8-VSB). > > > > The source of Steve's driver is from RealTek. More comments on > > origin can be found in the mxl5005s.[ch] files. > > > > There is some history in the list archives between Steve and Manu > > (and me indirectly) on the use of the mxl500x source module. > > > >> I wonder if perhaps the driver was ported from some other source > >> and nobody ever got around to getting the analog support working? > >> If that's the case then that is fine (I'll make it work), but I > >> want to know if I am just missing something obvious here.... > > > > I'd like to get the driver working a little better myself. Steve > > said the QAM suffers a 3 dB hit compared to Manu's version (IIRC). > > I'd like a decent signal strength readout. If I had a data sheet > > from MaxLinear maybe I could do something. It still looks like > > details of external tracking filter hardware need to be known and > > tested for each particular board though. > > > > Regards, > > Andy > > Thanks for the feedback. I just wanted a sanity check that I wasn't > missing something obvious. I'll take a look at the code, as well as > the original RealTek code and see if I can get the analog side > working. > > I'll send some emails and see if I can get the datasheet - I didn't > ask for it when I started the work since I was under the impression > that the driver was mature. > > Devin I seem to be affected by that 3db loss between the old mxl500x and the mxl5005s driver. Did you ever get the datasheets and is anyone perhaps even working on squeezing a little more out of the driver? -- Gruß Andreas -- 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
