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Re: [PATCH 02/12] [media] dvb-pll: Add support for THOMSON DTT7546X tuner.

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  Re: [PATCH 02/12] [media] dvb-pll: Add support for THOMSON DTT7546X  tuner. Peter Griffin <peter.griffin@linaro.org> - 2015-07-30 11:50 +0200
    Re: [PATCH 02/12] [media] dvb-pll: Add support for THOMSON DTT7546X  tuner. Joe Perches <joe@perches.com> - 2015-07-30 12:10 +0200
      Re: [PATCH 02/12] [media] dvb-pll: Add support for THOMSON DTT7546X tuner. Michael Ira Krufky <mkrufky@linuxtv.org> - 2015-07-30 13:20 +0200
        Re: [PATCH 02/12] [media] dvb-pll: Add support for THOMSON DTT7546X  tuner. Peter Griffin <peter.griffin@linaro.org> - 2015-07-30 16:40 +0200
      Re: [PATCH 02/12] [media] dvb-pll: Add support for THOMSON DTT7546X tuner. Michael Ira Krufky <mkrufky@linuxtv.org> - 2015-07-30 13:20 +0200
        Re: [PATCH 02/12] [media] dvb-pll: Add support for THOMSON DTT7546X  tuner. Peter Griffin <peter.griffin@linaro.org> - 2015-07-30 16:40 +0200

#1195866 — Re: [PATCH 02/12] [media] dvb-pll: Add support for THOMSON DTT7546X tuner.

Hi Mauro / Joe,

On Wed, 22 Jul 2015, Mauro Carvalho Chehab wrote:

> Em Wed, 24 Jun 2015 18:17:37 -0700
> Joe Perches <joe@perches.com> escreveu:
> 
> > On Wed, 2015-06-24 at 16:11 +0100, Peter Griffin wrote:
> > > This is used in conjunction with the STV0367 demodulator on
> > > the STV0367-NIM-V1.0 NIM card which can be used with the STi
> > > STB SoC's.
> > 
> > Barely associated to this specific patch, but for
> > dvb-pll.c, another thing that seems possible is to
> > convert the struct dvb_pll_desc uses to const and
> > change the "entries" fixed array size from 12 to []
> > 
> > It'd save a couple KB overall and remove ~5KB of data.
> > 
> > $ size drivers/media/dvb-frontends/dvb-pll.o*
> >    text	   data	    bss	    dec	    hex	filename
> >    8520	   1552	   2120	  12192	   2fa0	drivers/media/dvb-frontends/dvb-pll.o.new
> >    5624	   6363	   2120	  14107	   371b	drivers/media/dvb-frontends/dvb-pll.o.old
> 
> Peter,
> 
> Please add this patch on the next patch series you submit.

Ok will do, I've added this patch with a slightly updated commit message
to my series.

Joe - Can I add your signed-off-by?

regards,

Peter.
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#1195883

On Thu, 2015-07-30 at 10:47 +0100, Peter Griffin wrote:
> Hi Mauro / Joe,
> 
> On Wed, 22 Jul 2015, Mauro Carvalho Chehab wrote:
> 
> > Em Wed, 24 Jun 2015 18:17:37 -0700
> > Joe Perches <joe@perches.com> escreveu:
> > 
> > > On Wed, 2015-06-24 at 16:11 +0100, Peter Griffin wrote:
> > > > This is used in conjunction with the STV0367 demodulator on
> > > > the STV0367-NIM-V1.0 NIM card which can be used with the STi
> > > > STB SoC's.
> > > 
> > > Barely associated to this specific patch, but for
> > > dvb-pll.c, another thing that seems possible is to
> > > convert the struct dvb_pll_desc uses to const and
> > > change the "entries" fixed array size from 12 to []
> > > 
> > > It'd save a couple KB overall and remove ~5KB of data.
> > > 
> > > $ size drivers/media/dvb-frontends/dvb-pll.o*
> > >    text	   data	    bss	    dec	    hex	filename
> > >    8520	   1552	   2120	  12192	   2fa0	drivers/media/dvb-frontends/dvb-pll.o.new
> > >    5624	   6363	   2120	  14107	   371b	drivers/media/dvb-frontends/dvb-pll.o.old
> > 
> > Peter,
> > 
> > Please add this patch on the next patch series you submit.
> 
> Ok will do, I've added this patch with a slightly updated commit message
> to my series.
> 
> Joe - Can I add your signed-off-by?

Signed-off-by: Joe Perches <joe@perches.com>

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#1195918 — Re: [PATCH 02/12] [media] dvb-pll: Add support for THOMSON DTT7546X tuner.

On Thu, Jul 30, 2015 at 7:14 AM, Michael Ira Krufky <mkrufky@linuxtv.org> wrote:
> On Thu, Jul 30, 2015 at 6:08 AM, Joe Perches <joe@perches.com> wrote:
>> On Thu, 2015-07-30 at 10:47 +0100, Peter Griffin wrote:
>>> Hi Mauro / Joe,
>>>
>>> On Wed, 22 Jul 2015, Mauro Carvalho Chehab wrote:
>>>
>>> > Em Wed, 24 Jun 2015 18:17:37 -0700
>>> > Joe Perches <joe@perches.com> escreveu:
>>> >
>>> > > On Wed, 2015-06-24 at 16:11 +0100, Peter Griffin wrote:
>>> > > > This is used in conjunction with the STV0367 demodulator on
>>> > > > the STV0367-NIM-V1.0 NIM card which can be used with the STi
>>> > > > STB SoC's.
>>> > >
>>> > > Barely associated to this specific patch, but for
>>> > > dvb-pll.c, another thing that seems possible is to
>>> > > convert the struct dvb_pll_desc uses to const and
>>> > > change the "entries" fixed array size from 12 to []
>>> > >
>>> > > It'd save a couple KB overall and remove ~5KB of data.
>>> > >
>>> > > $ size drivers/media/dvb-frontends/dvb-pll.o*
>>> > >    text      data     bss     dec     hex filename
>>> > >    8520      1552    2120   12192    2fa0 drivers/media/dvb-frontends/dvb-pll.o.new
>>> > >    5624      6363    2120   14107    371b drivers/media/dvb-frontends/dvb-pll.o.old
>>> >
>>> > Peter,
>>> >
>>> > Please add this patch on the next patch series you submit.
>>>
>>> Ok will do, I've added this patch with a slightly updated commit message
>>> to my series.
>>>
>>> Joe - Can I add your signed-off-by?
>>
>> Signed-off-by: Joe Perches <joe@perches.com>
>
> Reviewed-by: Michael Ira Krufky <m.krufky@samsung.com>
>
> Joe, nice optimization - thanks for that.
>
> With regards to Peter's patch, is this a digital-only tuner, or is it
> a hybrid tuner?
>
> The 5th byte that you send to the THOMSON DTT7546X seems to resemble
> the 'auxiliary byte' that gets set in tuner-simple.c
>
> I'm not sure that dvb-pll is the right place for this tuner
> definition, if this is the case.  Maybe this definition belongs in
> tuner-simple instead, if the pattern matches better there.
>
> Mauro, can we hold off on merging Peter's patch until we resolve this?
>
> -Michael Ira Krufky

eek!  I mispelled my own email address.


With regards to Joe's patch - I'd like to see that merged.  ...and
here is my correctly spelled email address:


Reviewed-by: Michael Ira Krufky <m.krufky@samsung.com>
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#1196086

Hi Michael,

On Thu, 30 Jul 2015, Michael Ira Krufky wrote:

> On Thu, Jul 30, 2015 at 7:14 AM, Michael Ira Krufky <mkrufky@linuxtv.org> wrote:
> > On Thu, Jul 30, 2015 at 6:08 AM, Joe Perches <joe@perches.com> wrote:
> >> On Thu, 2015-07-30 at 10:47 +0100, Peter Griffin wrote:
> >>> Hi Mauro / Joe,
> >>>
> >>> On Wed, 22 Jul 2015, Mauro Carvalho Chehab wrote:
> >>>
> >>> > Em Wed, 24 Jun 2015 18:17:37 -0700
> >>> > Joe Perches <joe@perches.com> escreveu:
> >>> >
> >>> > > On Wed, 2015-06-24 at 16:11 +0100, Peter Griffin wrote:
> >>> > > > This is used in conjunction with the STV0367 demodulator on
> >>> > > > the STV0367-NIM-V1.0 NIM card which can be used with the STi
> >>> > > > STB SoC's.
> >>> > >
> >>> > > Barely associated to this specific patch, but for
> >>> > > dvb-pll.c, another thing that seems possible is to
> >>> > > convert the struct dvb_pll_desc uses to const and
> >>> > > change the "entries" fixed array size from 12 to []
> >>> > >
> >>> > > It'd save a couple KB overall and remove ~5KB of data.
> >>> > >
> >>> > > $ size drivers/media/dvb-frontends/dvb-pll.o*
> >>> > >    text      data     bss     dec     hex filename
> >>> > >    8520      1552    2120   12192    2fa0 drivers/media/dvb-frontends/dvb-pll.o.new
> >>> > >    5624      6363    2120   14107    371b drivers/media/dvb-frontends/dvb-pll.o.old
> >>> >
> >>> > Peter,
> >>> >
> >>> > Please add this patch on the next patch series you submit.
> >>>
> >>> Ok will do, I've added this patch with a slightly updated commit message
> >>> to my series.
> >>>
> >>> Joe - Can I add your signed-off-by?
> >>
> >> Signed-off-by: Joe Perches <joe@perches.com>
> >
> > Reviewed-by: Michael Ira Krufky <m.krufky@samsung.com>
> >
> > Joe, nice optimization - thanks for that.
> >
> > With regards to Peter's patch, is this a digital-only tuner, or is it
> > a hybrid tuner?
> >
> > The 5th byte that you send to the THOMSON DTT7546X seems to resemble
> > the 'auxiliary byte' that gets set in tuner-simple.c
> >
> > I'm not sure that dvb-pll is the right place for this tuner
> > definition, if this is the case.  Maybe this definition belongs in
> > tuner-simple instead, if the pattern matches better there.
> >
> > Mauro, can we hold off on merging Peter's patch until we resolve this?
> >
> > -Michael Ira Krufky
> 
> eek!  I mispelled my own email address.
> 
> 
> With regards to Joe's patch - I'd like to see that merged.  ...and
> here is my correctly spelled email address:
> 
> 
> Reviewed-by: Michael Ira Krufky <m.krufky@samsung.com>

Ok I will add your reviewed-by and include it in my v2.
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#1195921 — Re: [PATCH 02/12] [media] dvb-pll: Add support for THOMSON DTT7546X tuner.

On Thu, Jul 30, 2015 at 6:08 AM, Joe Perches <joe@perches.com> wrote:
> On Thu, 2015-07-30 at 10:47 +0100, Peter Griffin wrote:
>> Hi Mauro / Joe,
>>
>> On Wed, 22 Jul 2015, Mauro Carvalho Chehab wrote:
>>
>> > Em Wed, 24 Jun 2015 18:17:37 -0700
>> > Joe Perches <joe@perches.com> escreveu:
>> >
>> > > On Wed, 2015-06-24 at 16:11 +0100, Peter Griffin wrote:
>> > > > This is used in conjunction with the STV0367 demodulator on
>> > > > the STV0367-NIM-V1.0 NIM card which can be used with the STi
>> > > > STB SoC's.
>> > >
>> > > Barely associated to this specific patch, but for
>> > > dvb-pll.c, another thing that seems possible is to
>> > > convert the struct dvb_pll_desc uses to const and
>> > > change the "entries" fixed array size from 12 to []
>> > >
>> > > It'd save a couple KB overall and remove ~5KB of data.
>> > >
>> > > $ size drivers/media/dvb-frontends/dvb-pll.o*
>> > >    text      data     bss     dec     hex filename
>> > >    8520      1552    2120   12192    2fa0 drivers/media/dvb-frontends/dvb-pll.o.new
>> > >    5624      6363    2120   14107    371b drivers/media/dvb-frontends/dvb-pll.o.old
>> >
>> > Peter,
>> >
>> > Please add this patch on the next patch series you submit.
>>
>> Ok will do, I've added this patch with a slightly updated commit message
>> to my series.
>>
>> Joe - Can I add your signed-off-by?
>
> Signed-off-by: Joe Perches <joe@perches.com>

Reviewed-by: Michael Ira Krufky <mkrufky@samsung.com>

Joe, nice optimization - thanks for that.

With regards to Peter's patch, is this a digital-only tuner, or is it
a hybrid tuner?

The 5th byte that you send to the THOMSON DTT7546X seems to resemble
the 'auxiliary byte' that gets set in tuner-simple.c

I'm not sure that dvb-pll is the right place for this tuner
definition, if this is the case.  Maybe this definition belongs in
tuner-simple instead, if the pattern matches better there.

Mauro, can we hold off on merging Peter's patch until we resolve this?

-Michael Ira Krufky
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#1196092

Hi Michael,

On Thu, 30 Jul 2015, Michael Ira Krufky wrote:

> On Thu, Jul 30, 2015 at 7:14 AM, Michael Ira Krufky <mkrufky@linuxtv.org> wrote:
> > On Thu, Jul 30, 2015 at 6:08 AM, Joe Perches <joe@perches.com> wrote:
> >> On Thu, 2015-07-30 at 10:47 +0100, Peter Griffin wrote:
> >>> Hi Mauro / Joe,
> >>>
> >>> On Wed, 22 Jul 2015, Mauro Carvalho Chehab wrote:
> >>>
> >>> > Em Wed, 24 Jun 2015 18:17:37 -0700
> >>> > Joe Perches <joe@perches.com> escreveu:
> >>> >
> >>> > > On Wed, 2015-06-24 at 16:11 +0100, Peter Griffin wrote:
> >>> > > > This is used in conjunction with the STV0367 demodulator on
> >>> > > > the STV0367-NIM-V1.0 NIM card which can be used with the STi
> >>> > > > STB SoC's.
> >>> > >
> >>> > > Barely associated to this specific patch, but for
> >>> > > dvb-pll.c, another thing that seems possible is to
> >>> > > convert the struct dvb_pll_desc uses to const and
> >>> > > change the "entries" fixed array size from 12 to []
> >>> > >
> >>> > > It'd save a couple KB overall and remove ~5KB of data.
> >>> > >
> >>> > > $ size drivers/media/dvb-frontends/dvb-pll.o*
> >>> > >    text      data     bss     dec     hex filename
> >>> > >    8520      1552    2120   12192    2fa0 drivers/media/dvb-frontends/dvb-pll.o.new
> >>> > >    5624      6363    2120   14107    371b drivers/media/dvb-frontends/dvb-pll.o.old
> >>> >
> >>> > Peter,
> >>> >
> >>> > Please add this patch on the next patch series you submit.
> >>>
> >>> Ok will do, I've added this patch with a slightly updated commit message
> >>> to my series.
> >>>
> >>> Joe - Can I add your signed-off-by?
> >>
> >> Signed-off-by: Joe Perches <joe@perches.com>
> >
> > Reviewed-by: Michael Ira Krufky <m.krufky@samsung.com>
> >
> > Joe, nice optimization - thanks for that.
> >
> > With regards to Peter's patch, is this a digital-only tuner, or is it
> > a hybrid tuner?
> >
> > The 5th byte that you send to the THOMSON DTT7546X seems to resemble
> > the 'auxiliary byte' that gets set in tuner-simple.c
> >
> > I'm not sure that dvb-pll is the right place for this tuner
> > definition, if this is the case.  Maybe this definition belongs in
> > tuner-simple instead, if the pattern matches better there.
> >
> > Mauro, can we hold off on merging Peter's patch until we resolve this?
> 
> This code block, specifically, I would rather not see added into dvb-pll:
> 
> +static int dvb_pll_get_num_regs(struct dvb_pll_priv *priv)
> +{
> +       int num_regs = 4;
> +
> +       if (strncmp(priv->pll_desc->name, "Thomson dtt7546x", 16) == 0)
> +               num_regs = 5;
> +
> +       return num_regs;
> +}
> +
> 
> tuner-simple provides an infrastructure that allows this tuner to be
> added in a more elegant way without the need to add special cases to
> otherwise generic code, as done in the above.
> 
> I'm sorry, Peter.  Can you take a look at tuner-simple and consider
> sending a new patch?

Yes sure. I wasn't actually aware that tuner-simple existed. From what I
can see briefly looking at it, it does look a more suitable way of adding
support for this tuner.

The dtt7546x is a dual tuner in that it supports dvb-t and dvb-c, however
I have only tested it with DVB-T as that is the only feed I have to my home office.

As I have a V2 incorporating all of Mauro's changes ready to send, and I'm 
on holiday for 3 weeks from Friday, I will temporarily drop support for this
tuner and NIM card in V2, and migrate over to the new driver when I return end
of August.

regards,

Peter.
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