linux-kernel - Re: [PATCH] V4L: Link tuner before saa7134

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Date:	Mon, 14 Jul 2008 12:40:32 +0100
From:	"Simon Arlott" <simon@...e.lp0.eu>
To:	"hermann pitton" <hermann-pitton@...or.de>
Cc:	v4l-dvb-maintainer@...uxtv.org,
	"Linux DVB" <linux-dvb@...uxtv.org>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] V4L: Link tuner before saa7134

On Mon, July 14, 2008 03:48, hermann pitton wrote:
>
> Am Sonntag, den 13.07.2008, 19:32 +0100 schrieb Simon Arlott:
>> >From cde790c56ffe76f3d0bf6f38d89f4e671a5218c6 Mon Sep 17 00:00:00 2001
>> From: Simon Arlott <simon@...rum.invalid>
>> Date: Sun, 13 Jul 2008 19:24:53 +0100
>> Subject: [PATCH] V4L: Link tuner before saa7134
>>
>> If saa7134_init is run before v4l2_i2c_drv_init (tuner),
>> then saa7134_board_init2 will try to set the tuner type
>> for devices that don't exist yet. This moves tuner to
>> before all of the device-specific drivers so that it's
>> loaded early enough on boot.
>>
>> Signed-off-by: Simon Arlott <simon@...e.lp0.eu>
>> ---
>>  drivers/media/video/Makefile |    4 ++--
>>  1 files changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
>> index ecbbfaa..6b0af12 100644
>> --- a/drivers/media/video/Makefile
>> +++ b/drivers/media/video/Makefile
>> @@ -18,6 +18,8 @@ ifeq ($(CONFIG_VIDEO_V4L1_COMPAT),y)
>>    obj-$(CONFIG_VIDEO_DEV) += v4l1-compat.o
>>  endif
>>
>> +obj-$(CONFIG_VIDEO_TUNER) += tuner.o
>> +
>>  obj-$(CONFIG_VIDEO_BT848) += bt8xx/
>>  obj-$(CONFIG_VIDEO_IR_I2C)  += ir-kbd-i2c.o
>>  obj-$(CONFIG_VIDEO_TVAUDIO) += tvaudio.o
>> @@ -84,8 +86,6 @@ obj-$(CONFIG_VIDEO_HEXIUM_GEMINI) += hexium_gemini.o
>>  obj-$(CONFIG_VIDEO_DPC) += dpc7146.o
>>  obj-$(CONFIG_TUNER_3036) += tuner-3036.o
>>
>> -obj-$(CONFIG_VIDEO_TUNER) += tuner.o
>> -
>>  obj-$(CONFIG_VIDEOBUF_GEN) += videobuf-core.o
>>  obj-$(CONFIG_VIDEOBUF_DMA_SG) += videobuf-dma-sg.o
>>  obj-$(CONFIG_VIDEOBUF_VMALLOC) += videobuf-vmalloc.o
>> --
>> 1.5.6.2
>>
>
> Thanks a lot for working on it!
>
> I must admit that I have not tested it yet.
>
> Remaining issues are.
>
> #1 users can't set the tuner type anymore,
>    but the few cases of tuner detection from eeprom we have should
>    work again for that price.
There are already module parameters to do that... they can be used
from the kernel command line too.

>
> #2 We still don't have any sufficient HDTV support in the kernel ;)
>
DVB-T2? Why is that relevant to this change? My card doesn't even support
it.

> #0 On 2.6.25, without dedicated TV subnorm selection possible anymore
>    and known auto detection flaws, fixed now, folks should have
>    complained about it.
>
>    Interestingly nothing like that happened.
>
>    What could that mean?
>
I'm not sure what you're asking, but not many people appear to compile
v4l/dvb into the kernel. Lots of function calls still work on
uninitialised modules so ordering problems can easily be missed.

> Cheers,
> Hermann

-- 
Simon Arlott
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