Problems tuning PAL-D with a Hauppauge HVR-1110 (TDA18271 tuner) - workaround hack included

Problems tuning PAL-D with a Hauppauge HVR-1110 (TDA18271 tuner) - workaround hack included

[Simon Farnsworth]

(note - the CC list is everyone over 50% certainty from get_maintainer.pl)

I'm having problems getting a Hauppauge HVR-1110 card to successfully
tune PAL-D at 85.250 MHz vision frequency; by experimentation, I've
determined that the tda18271 is tuning to a frequency 1.25 MHz lower
than the vision frequency I've requested, so the following workaround
"fixes" it for me.

diff --git a/drivers/media/common/tuners/tda18271-fe.c 
b/drivers/media/common/tuners/tda18271-fe.c
index 63cc400..1a94e1a 100644
--- a/drivers/media/common/tuners/tda18271-fe.c
+++ b/drivers/media/common/tuners/tda18271-fe.c
@@ -1031,6 +1031,7 @@ static int tda18271_set_analog_params(struct 
dvb_frontend *fe,
 		mode = "I";
 	} else if (params->std & V4L2_STD_DK) {
 		map = &std_map->atv_dk;
+                freq += 1250000;
 		mode = "DK";
 	} else if (params->std & V4L2_STD_SECAM_L) {
 		map = &std_map->atv_l;

I've checked with a signal analyser, and confirmed that my signal
generator is getting the spectrum right - I am seeing vision peaking
at 85.25 MHz, with one sideband going down to 84.5 MHz, and the other
going up to 90.5MHz. I also see an audio carrier at 91.75 MHz.

I'm going to run with this hack in place, but I'd appreciate it if
someone who knew more about the TDA18271 looked at this, and either
gave me a proper fix for testing, or confirmed that what I'm doing is
right.
--
Simon Farnsworth
Software Engineer
ONELAN Limited
http://www.onelan.com/

Re: Problems tuning PAL-D with a Hauppauge HVR-1110 (TDA18271 tuner) - workaround hack included

[Devin Heitmueller]

Hi Simon,

On Wed, Sep 28, 2011 at 8:50 AM, Simon Farnsworth
<simon.farnsworth@onelan.com> wrote:
> (note - the CC list is everyone over 50% certainty from get_maintainer.pl)
>
> I'm having problems getting a Hauppauge HVR-1110 card to successfully
> tune PAL-D at 85.250 MHz vision frequency; by experimentation, I've
> determined that the tda18271 is tuning to a frequency 1.25 MHz lower
> than the vision frequency I've requested, so the following workaround
> "fixes" it for me.
>
> diff --git a/drivers/media/common/tuners/tda18271-fe.c
> b/drivers/media/common/tuners/tda18271-fe.c
> index 63cc400..1a94e1a 100644
> --- a/drivers/media/common/tuners/tda18271-fe.c
> +++ b/drivers/media/common/tuners/tda18271-fe.c
> @@ -1031,6 +1031,7 @@ static int tda18271_set_analog_params(struct
> dvb_frontend *fe,
>                mode = "I";
>        } else if (params->std & V4L2_STD_DK) {
>                map = &std_map->atv_dk;
> +                freq += 1250000;
>                mode = "DK";
>        } else if (params->std & V4L2_STD_SECAM_L) {
>                map = &std_map->atv_l;
>
> I've checked with a signal analyser, and confirmed that my signal
> generator is getting the spectrum right - I am seeing vision peaking
> at 85.25 MHz, with one sideband going down to 84.5 MHz, and the other
> going up to 90.5MHz. I also see an audio carrier at 91.75 MHz.
>
> I'm going to run with this hack in place, but I'd appreciate it if
> someone who knew more about the TDA18271 looked at this, and either
> gave me a proper fix for testing, or confirmed that what I'm doing is
> right.

Hi Simon,

This is interesting.  I did some testing with an 18271 based device a
few months back (a Hauppauge cx231xx based tuner), and I believe
PAL-DK was working (although I did have unrelated issues with the DIF
configuration).

When you are doing the tuning request, are you explicitly stating
PAL-D in your calling application?  Or are you passing "PAL" to the
V4L layer and expecting it to work with a PAL-D feed?

I'm not doubting your findings, and clearly you've done a good bit of
research/analysis, but I did want to raise it as a data point to
consider....

Devin

-- 
Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com

Re: Problems tuning PAL-D with a Hauppauge HVR-1110 (TDA18271 tuner) - workaround hack included

[Simon Farnsworth]

On Wednesday 28 September 2011, Devin Heitmueller <dheitmueller@kernellabs.com> wrote:
> Hi Simon,
> 
> On Wed, Sep 28, 2011 at 8:50 AM, Simon Farnsworth
> 
> <simon.farnsworth@onelan.com> wrote:
> > 
> > I'm having problems getting a Hauppauge HVR-1110 card to successfully
> > tune PAL-D at 85.250 MHz vision frequency; by experimentation, I've
> > determined that the tda18271 is tuning to a frequency 1.25 MHz lower
> > than the vision frequency I've requested, so the following workaround
> > "fixes" it for me.
> > 
> > I'm going to run with this hack in place, but I'd appreciate it if
> > someone who knew more about the TDA18271 looked at this, and either
> > gave me a proper fix for testing, or confirmed that what I'm doing is
> > right.
> 
> Hi Simon,
> 
> This is interesting.  I did some testing with an 18271 based device a
> few months back (a Hauppauge cx231xx based tuner), and I believe
> PAL-DK was working (although I did have unrelated issues with the DIF
> configuration).
> 
> When you are doing the tuning request, are you explicitly stating
> PAL-D in your calling application?  Or are you passing "PAL" to the
> V4L layer and expecting it to work with a PAL-D feed?
>
I'm noticing this problem because I fixed a bug of ours, where we were
passing PAL to the V4L2 layer, and expecting it to work (video did, at the
correct frequency, but audio did not, as the TDA18271 chose PAL-B).

Having fixed the bug, I was having to either adjust my signal generator down
by 1.25MHz, or adjust the frequency I passed to V4L2 up by 1.25MHz to make
PAL-D work.

Hence the hack - I've confirmed that with the hack in place, I can get
colour video from the signal if I use PAL-B or PAL-D, and sound if I use
PAL-D. Without the hack, I need to change the frequency as I toggle between
PAL-B and PAL-D, or I lose video.

-- 
Simon Farnsworth
Software Engineer
ONELAN Limited
http://www.onelan.com/

Re: Problems tuning PAL-D with a Hauppauge HVR-1110 (TDA18271 tuner) - workaround hack included

[Mauro Carvalho Chehab]

Em 28-09-2011 09:50, Simon Farnsworth escreveu:
> (note - the CC list is everyone over 50% certainty from get_maintainer.pl)
> 
> I'm having problems getting a Hauppauge HVR-1110 card to successfully
> tune PAL-D at 85.250 MHz vision frequency; by experimentation, I've
> determined that the tda18271 is tuning to a frequency 1.25 MHz lower
> than the vision frequency I've requested, so the following workaround
> "fixes" it for me.
> 
> diff --git a/drivers/media/common/tuners/tda18271-fe.c 
> b/drivers/media/common/tuners/tda18271-fe.c
> index 63cc400..1a94e1a 100644
> --- a/drivers/media/common/tuners/tda18271-fe.c
> +++ b/drivers/media/common/tuners/tda18271-fe.c
> @@ -1031,6 +1031,7 @@ static int tda18271_set_analog_params(struct 
> dvb_frontend *fe,
>  		mode = "I";
>  	} else if (params->std & V4L2_STD_DK) {
>  		map = &std_map->atv_dk;
> +                freq += 1250000;
>  		mode = "DK";
>  	} else if (params->std & V4L2_STD_SECAM_L) {
>  		map = &std_map->atv_l;

If I am to fix this bug, instead of a hack like that, it seems to be better
to split the .atv_dk line at the struct tda18271_std_map maps on
drivers/media/common/tuners/tda18271-maps.c.

Looking at the datasheet, on page 43, available at:
	http://www.nxp.com/documents/data_sheet/TDA18271HD.pdf

The offset values for IF seem ok, but maybe your device is using some variant
of this chip that requires a different maps table.

> 
> I've checked with a signal analyser, and confirmed that my signal
> generator is getting the spectrum right - I am seeing vision peaking
> at 85.25 MHz, with one sideband going down to 84.5 MHz, and the other
> going up to 90.5MHz. I also see an audio carrier at 91.75 MHz.
> 
> I'm going to run with this hack in place, but I'd appreciate it if
> someone who knew more about the TDA18271 looked at this, and either
> gave me a proper fix for testing, or confirmed that what I'm doing is
> right.
> --
> Simon Farnsworth
> Software Engineer
> ONELAN Limited
> http://www.onelan.com/
> --
> To unsubscribe from this list: send the line "unsubscribe linux-media" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Problems tuning PAL-D with a Hauppauge HVR-1110 (TDA18271 tuner) - workaround hack included

[Simon Farnsworth]

On Friday 30 September 2011, Mauro Carvalho Chehab <mchehab@infradead.org> wrote:
> Em 28-09-2011 09:50, Simon Farnsworth escreveu:
> > (note - the CC list is everyone over 50% certainty from get_maintainer.pl)
> > 
> > I'm having problems getting a Hauppauge HVR-1110 card to successfully
> > tune PAL-D at 85.250 MHz vision frequency; by experimentation, I've
> > determined that the tda18271 is tuning to a frequency 1.25 MHz lower
> > than the vision frequency I've requested, so the following workaround
> > "fixes" it for me.
> > 
> > diff --git a/drivers/media/common/tuners/tda18271-fe.c 
> > b/drivers/media/common/tuners/tda18271-fe.c
> > index 63cc400..1a94e1a 100644
> > --- a/drivers/media/common/tuners/tda18271-fe.c
> > +++ b/drivers/media/common/tuners/tda18271-fe.c
> > @@ -1031,6 +1031,7 @@ static int tda18271_set_analog_params(struct 
> > dvb_frontend *fe,
> >  		mode = "I";
> >  	} else if (params->std & V4L2_STD_DK) {
> >  		map = &std_map->atv_dk;
> > +                freq += 1250000;
> >  		mode = "DK";
> >  	} else if (params->std & V4L2_STD_SECAM_L) {
> >  		map = &std_map->atv_l;
> 
> If I am to fix this bug, instead of a hack like that, it seems to be better
> to split the .atv_dk line at the struct tda18271_std_map maps on
> drivers/media/common/tuners/tda18271-maps.c.
> 
> Looking at the datasheet, on page 43, available at:
> 	http://www.nxp.com/documents/data_sheet/TDA18271HD.pdf
> 
> The offset values for IF seem ok, but maybe your device is using some variant
> of this chip that requires a different maps table.
>
How would I identify this? I definitely need the hack on multiple different
HVR1110 cards, in different motherboards. I get apparently perfect reception
if I apply the hack, so clearly something is wrong.
-- 
Simon Farnsworth
Software Engineer
ONELAN Limited
http://www.onelan.com/

Re: Problems tuning PAL-D with a Hauppauge HVR-1110 (TDA18271 tuner) - workaround hack included

[Mauro Carvalho Chehab]

Em 30-09-2011 08:03, Simon Farnsworth escreveu:
> On Friday 30 September 2011, Mauro Carvalho Chehab <mchehab@infradead.org> wrote:
>> Em 28-09-2011 09:50, Simon Farnsworth escreveu:
>>> (note - the CC list is everyone over 50% certainty from get_maintainer.pl)
>>>
>>> I'm having problems getting a Hauppauge HVR-1110 card to successfully
>>> tune PAL-D at 85.250 MHz vision frequency; by experimentation, I've
>>> determined that the tda18271 is tuning to a frequency 1.25 MHz lower
>>> than the vision frequency I've requested, so the following workaround
>>> "fixes" it for me.
>>>
>>> diff --git a/drivers/media/common/tuners/tda18271-fe.c 
>>> b/drivers/media/common/tuners/tda18271-fe.c
>>> index 63cc400..1a94e1a 100644
>>> --- a/drivers/media/common/tuners/tda18271-fe.c
>>> +++ b/drivers/media/common/tuners/tda18271-fe.c
>>> @@ -1031,6 +1031,7 @@ static int tda18271_set_analog_params(struct 
>>> dvb_frontend *fe,
>>>  		mode = "I";
>>>  	} else if (params->std & V4L2_STD_DK) {
>>>  		map = &std_map->atv_dk;
>>> +                freq += 1250000;
>>>  		mode = "DK";
>>>  	} else if (params->std & V4L2_STD_SECAM_L) {
>>>  		map = &std_map->atv_l;
>>
>> If I am to fix this bug, instead of a hack like that, it seems to be better
>> to split the .atv_dk line at the struct tda18271_std_map maps on
>> drivers/media/common/tuners/tda18271-maps.c.
>>
>> Looking at the datasheet, on page 43, available at:
>> 	http://www.nxp.com/documents/data_sheet/TDA18271HD.pdf
>>
>> The offset values for IF seem ok, but maybe your device is using some variant
>> of this chip that requires a different maps table.
>>
> How would I identify this? I definitely need the hack on multiple different
> HVR1110 cards, in different motherboards.

Michael/Devin may be able to double check what tda18271 variants are used at the
hvr1100 supported models.

It seems that there are 5 HVR-1100 model variants:

drivers/media/video/saa7134/saa7134-cards.c:      case 67019: /* WinTV-HVR1110 (Retail, IR Blaster, hybrid, FM, SVid/Comp, 3.5mm audio in) */
drivers/media/video/saa7134/saa7134-cards.c:      case 67209: /* WinTV-HVR1110 (Retail, IR Receive, hybrid, FM, SVid/Comp, 3.5mm audio in) */
drivers/media/video/saa7134/saa7134-cards.c:      case 67559: /* WinTV-HVR1110 (OEM, no IR, hybrid, FM, SVid/Comp, RCA aud) */
drivers/media/video/saa7134/saa7134-cards.c:      case 67569: /* WinTV-HVR1110 (OEM, no IR, hybrid, FM) */
drivers/media/video/saa7134/saa7134-cards.c:      case 67579: /* WinTV-HVR1110 (OEM, no IR, hybrid, no FM) */

> I get apparently perfect reception
> if I apply the hack, so clearly something is wrong.

Yes, but, on the other hand, if the device has the C2 or HD variant of tda18271,
the driver locks correct, acording with the datasheet.

Cheers,
Mauro

Re: Problems tuning PAL-D with a Hauppauge HVR-1110 (TDA18271 tuner) - workaround hack included

[Devin Heitmueller]

On Fri, Sep 30, 2011 at 7:59 AM, Mauro Carvalho Chehab
<mchehab@infradead.org> wrote:
> Michael/Devin may be able to double check what tda18271 variants are used at the
> hvr1100 supported models.

Mike could confirm definitively but I would be very surprised if it
was anything other than a C2.  I also don't think we've had multiple
revisions of that board (other than the ones in the list which were
all released at the same time and are just different population
options).

All that said, I also wonder if perhaps this is an issue with the
analog demod as opposed to the tuner.  It feels unlikely but that
might explain why I didn't see similar results when I did the testing
on the cx231xx/tda18271 combo back in February.

The big problem here really though is that somebody who is
knowledgeable of the driver internals needs to dig into the issue, and
I don't foresee that happening in the immediate future (I cannot speak
for Michael but I've been too tied up in other projects).  I'm
definitely not discounting Simon's skills or findings, but this needs
to be investigated in a context beyond the tuner/demod combination
found on a single product.

Devin

-- 
Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com

Re: Problems tuning PAL-D with a Hauppauge HVR-1110 (TDA18271 tuner) - workaround hack included

[Simon Farnsworth]

On Friday 30 September 2011, Mauro Carvalho Chehab <mchehab@infradead.org> wrote:
> Em 28-09-2011 09:50, Simon Farnsworth escreveu:
> > (note - the CC list is everyone over 50% certainty from get_maintainer.pl)
> > 
> > I'm having problems getting a Hauppauge HVR-1110 card to successfully
> > tune PAL-D at 85.250 MHz vision frequency; by experimentation, I've
> > determined that the tda18271 is tuning to a frequency 1.25 MHz lower
> > than the vision frequency I've requested, so the following workaround
> > "fixes" it for me.
> > 
> > diff --git a/drivers/media/common/tuners/tda18271-fe.c 
> > b/drivers/media/common/tuners/tda18271-fe.c
> > index 63cc400..1a94e1a 100644
> > --- a/drivers/media/common/tuners/tda18271-fe.c
> > +++ b/drivers/media/common/tuners/tda18271-fe.c
> > @@ -1031,6 +1031,7 @@ static int tda18271_set_analog_params(struct 
> > dvb_frontend *fe,
> >  		mode = "I";
> >  	} else if (params->std & V4L2_STD_DK) {
> >  		map = &std_map->atv_dk;
> > +                freq += 1250000;
> >  		mode = "DK";
> >  	} else if (params->std & V4L2_STD_SECAM_L) {
> >  		map = &std_map->atv_l;
> 
> If I am to fix this bug, instead of a hack like that, it seems to be better
> to split the .atv_dk line at the struct tda18271_std_map maps on
> drivers/media/common/tuners/tda18271-maps.c.
> 
> Looking at the datasheet, on page 43, available at:
> 	http://www.nxp.com/documents/data_sheet/TDA18271HD.pdf
> 
> The offset values for IF seem ok, but maybe your device is using some variant
> of this chip that requires a different maps table.
>
How would I identify that?

I definitely need the hack on multiple different HVR1110 cards, in different
motherboards, so if it's a new variant needing a new maps table, it should
be possible to distinguish it from the other devices somehow - but I have no
idea how.
-- 
Simon Farnsworth
Software Engineer
ONELAN Limited
http://www.onelan.com/

Re: Problems tuning PAL-D with a Hauppauge HVR-1110 (TDA18271 tuner) - workaround hack included

[Mauro Carvalho Chehab]

Em 30-09-2011 08:11, Simon Farnsworth escreveu:
> On Friday 30 September 2011, Mauro Carvalho Chehab <mchehab@infradead.org> wrote:
>> Em 28-09-2011 09:50, Simon Farnsworth escreveu:
>>> (note - the CC list is everyone over 50% certainty from get_maintainer.pl)
>>>
>>> I'm having problems getting a Hauppauge HVR-1110 card to successfully
>>> tune PAL-D at 85.250 MHz vision frequency; by experimentation, I've
>>> determined that the tda18271 is tuning to a frequency 1.25 MHz lower
>>> than the vision frequency I've requested, so the following workaround
>>> "fixes" it for me.
>>>
>>> diff --git a/drivers/media/common/tuners/tda18271-fe.c 
>>> b/drivers/media/common/tuners/tda18271-fe.c
>>> index 63cc400..1a94e1a 100644
>>> --- a/drivers/media/common/tuners/tda18271-fe.c
>>> +++ b/drivers/media/common/tuners/tda18271-fe.c
>>> @@ -1031,6 +1031,7 @@ static int tda18271_set_analog_params(struct 
>>> dvb_frontend *fe,
>>>  		mode = "I";
>>>  	} else if (params->std & V4L2_STD_DK) {
>>>  		map = &std_map->atv_dk;
>>> +                freq += 1250000;
>>>  		mode = "DK";
>>>  	} else if (params->std & V4L2_STD_SECAM_L) {
>>>  		map = &std_map->atv_l;
>>
>> If I am to fix this bug, instead of a hack like that, it seems to be better
>> to split the .atv_dk line at the struct tda18271_std_map maps on
>> drivers/media/common/tuners/tda18271-maps.c.
>>
>> Looking at the datasheet, on page 43, available at:
>> 	http://www.nxp.com/documents/data_sheet/TDA18271HD.pdf
>>
>> The offset values for IF seem ok, but maybe your device is using some variant
>> of this chip that requires a different maps table.
>>
> How would I identify that?
> 
> I definitely need the hack on multiple different HVR1110 cards, in different
> motherboards, so if it's a new variant needing a new maps table, it should
> be possible to distinguish it from the other devices somehow - but I have no
> idea how.

The tveeprom.c uses the board eeprom to read the tuner model. I might be wrong, but
when Hauppauge uses a different component, a new entry is created there.

Regards,
Mauro

Re: Problems tuning PAL-D with a Hauppauge HVR-1110 (TDA18271 tuner) - workaround hack included

[Malcolm Priestley]

On 28/09/11 13:50, Simon Farnsworth wrote:
> (note - the CC list is everyone over 50% certainty from get_maintainer.pl)
>
> I'm having problems getting a Hauppauge HVR-1110 card to successfully
> tune PAL-D at 85.250 MHz vision frequency; by experimentation, I've
> determined that the tda18271 is tuning to a frequency 1.25 MHz lower
> than the vision frequency I've requested, so the following workaround
> "fixes" it for me.

Are you sure the transmitter concerned doesn't have a VSB filter for an 
adjacent DVB-T digital transmitter?

VSB fitlers have been used on UK(PAL-I) transmitters for some time.

From
downloads.bbc.co.uk/rd/pubs/whp/whp-pdf-files/WHP023.pdf

"To avoid the likelihood of PAL-I interference to DTT transmissions, the 
proposal is to use a System B/G VSB filter which provides at least 30 dB 
of sideband attenuation at 1.4 MHz below the vision carrier. It is also 
necessary to reduce the image sidebands resulting from transmitter 
non-linearity, and the method is to fit a high-order bandpass filter at 
the transmitter output. Typically, the overall sideband response will be 
-2 dB at (fv - 0.75) MHz and -20 dB at (fv - 1.25) MHz, where fv is the 
frequency of the vision carrier."

Re: Problems tuning PAL-D with a Hauppauge HVR-1110 (TDA18271 tuner) - workaround hack included

[Simon Farnsworth]

On Friday 30 September 2011, Malcolm Priestley <tvboxspy@gmail.com> wrote:
> On 28/09/11 13:50, Simon Farnsworth wrote:
> > (note - the CC list is everyone over 50% certainty from get_maintainer.pl)
> >
> > I'm having problems getting a Hauppauge HVR-1110 card to successfully
> > tune PAL-D at 85.250 MHz vision frequency; by experimentation, I've
> > determined that the tda18271 is tuning to a frequency 1.25 MHz lower
> > than the vision frequency I've requested, so the following workaround
> > "fixes" it for me.
> 
> Are you sure the transmitter concerned doesn't have a VSB filter for an 
> adjacent DVB-T digital transmitter?
>
The "transmitter" concerned is a test pattern generator - it has no filters
applied to its output.

The intended customer for this device is in China, hence the use of PAL-D.
-- 
Simon Farnsworth
Software Engineer
ONELAN Limited
http://www.onelan.com/

Re: Problems tuning PAL-D with a Hauppauge HVR-1110 (TDA18271 tuner) - workaround hack included

[Steven Toth]

>                map = &std_map->atv_dk;

Simon,

I've been chewing on this for a day or so and it reminded me partly
why I stopped working on combined PAL/NTSC support for the saa7164
hardware family, it's been bugging me for a reason - now I understand
why.

Essentially, I had a long discussion with Mike Krufky about a year ago
related to I/F's for analog TV output. The SAA7164 analog demod IF (as
best as I can tell) are not configurable. I have no good set_if()
interface I can call on the tuner to select a different I/F as the
bridge driver needs. I was fairly unhappy about that..... bah, such is
life.

The TDA18271 driver on linux DOES NOT use the same I/F's that the
windows driver uses. Reason? Mike Decided to follow the data sheet and
NOT use the Hauppauge specifically select IFs.

His advise to me, at the time, which I think will work nicely for you
and probably a better patch, is to have the HVR-1110 define a better
I/F map for the atv_dk case. This way at least you would not pollute
the 18271 driver in it's core and effect other DK users (potentially),
instead, for the HVR1110 18271 attach, define the I/F maps for each
country/modulation and simple change the DK version by your desired
offset.

That may be a cleaner fix and accepted for merge.

(Note to self: Now that I recall the conversation with Mike I may
actually go ahead and fix my saa7164 Pal issue.)

-- 
Steven Toth - Kernel Labs
http://www.kernellabs.com

Re: Problems tuning PAL-D with a Hauppauge HVR-1110 (TDA18271 tuner) - workaround hack included

[Andy Walls]

Steven Toth <stoth@kernellabs.com> wrote:

>>                map = &std_map->atv_dk;
>
>Simon,
>
>I've been chewing on this for a day or so and it reminded me partly
>why I stopped working on combined PAL/NTSC support for the saa7164
>hardware family, it's been bugging me for a reason - now I understand
>why.
>
>Essentially, I had a long discussion with Mike Krufky about a year ago
>related to I/F's for analog TV output. The SAA7164 analog demod IF (as
>best as I can tell) are not configurable. I have no good set_if()
>interface I can call on the tuner to select a different I/F as the
>bridge driver needs. I was fairly unhappy about that..... bah, such is
>life.
>
>The TDA18271 driver on linux DOES NOT use the same I/F's that the
>windows driver uses. Reason? Mike Decided to follow the data sheet and
>NOT use the Hauppauge specifically select IFs.
>
>His advise to me, at the time, which I think will work nicely for you
>and probably a better patch, is to have the HVR-1110 define a better
>I/F map for the atv_dk case. This way at least you would not pollute
>the 18271 driver in it's core and effect other DK users (potentially),
>instead, for the HVR1110 18271 attach, define the I/F maps for each
>country/modulation and simple change the DK version by your desired
>offset.
>
>That may be a cleaner fix and accepted for merge.
>
>(Note to self: Now that I recall the conversation with Mike I may
>actually go ahead and fix my saa7164 Pal issue.)
>
>-- 
>Steven Toth - Kernel Labs
>http://www.kernellabs.com
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Simon,

If you have one of the latest HVR1600's with that analog tuner, does PAL-D work with it without and offset?

Regards,
Andy

Re: Problems tuning PAL-D with a Hauppauge HVR-1110 (TDA18271 tuner) - workaround hack included

[Simon Farnsworth]

On Friday 30 September 2011, Andy Walls <awalls@md.metrocast.net> wrote:
> Steven Toth <stoth@kernellabs.com> wrote:
> >The TDA18271 driver on linux DOES NOT use the same I/F's that the
> >windows driver uses. Reason? Mike Decided to follow the data sheet and
> >NOT use the Hauppauge specifically select IFs.
> 
> If you have one of the latest HVR1600's with that analog tuner, does PAL-D work with it without and offset?
>
I don't have a current model HVR-1600 to hand - if I get hold of one, I will
test it.
-- 
Simon Farnsworth
Software Engineer
ONELAN Limited
http://www.onelan.com/