linux-kernel - Re: [PATCH] V4L/DVB: tuner and radio addresses are missing for the PixelView PlayTV card

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Date:	03 Mar 2008 09:35:09 +0100
From:	Wojciech Migda <wojtek.golf@...eria.pl>
To:	"mchehab@...radead.org" <mchehab@...radead.org>,
	"v4l-dvb-maintainer@...uxtv.org" <v4l-dvb-maintainer@...uxtv.org>
Cc:	"torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"trivial@...nel.org" <trivial@...nel.org>
Subject: Re: [PATCH] V4L/DVB: tuner and radio addresses are missing for the PixelView PlayTV card

Hi again,

the previous patch was for the 2.6.22 kernel. The two below are for the 2.6.24.3 and 2.6.25-rc3, respectively:

         Signed-off-by: Wojciech Migda <wojtek <dot> golf <at> interia <dot> pl>

---
--- /usr/src/linux/drivers/media/video/bt8xx/bttv-cards.c.orig	2008-03-03 08:13:47.000000000 +0000
+++ /usr/src/linux/drivers/media/video/bt8xx/bttv-cards.c	2008-03-03 08:20:33.944363735 +0000
@@ -589,6 +589,8 @@ struct tvcard bttv_tvcards[] = {
 		.needs_tvaudio	= 1,
 		.pll		= PLL_28,
 		.tuner_type	= UNSET,
+		.tuner_addr	= ADDR_UNSET,
+		.radio_addr	= ADDR_UNSET,
 	},
 	[BTTV_BOARD_WINVIEW_601] = {
 		.name		= "Leadtek WinView 601",


---
--- /usr/src/linux/drivers/media/video/bt8xx/bttv-cards.c.orig	2008-03-03 08:14:56.000000000 +0000
+++ /usr/src/linux/drivers/media/video/bt8xx/bttv-cards.c	2008-03-03 08:27:42.217028054 +0000
@@ -576,6 +576,8 @@ struct tvcard bttv_tvcards[] = {
 		.needs_tvaudio	= 1,
 		.pll		= PLL_28,
 		.tuner_type	= UNSET,
+		.tuner_addr	= ADDR_UNSET,
+		.radio_addr	= ADDR_UNSET,
 	},
 	[BTTV_BOARD_WINVIEW_601] = {
 		.name		= "Leadtek WinView 601",

> From: Wojciech Migda <wojtek.golf@...eria.pl>
> 
> the PixelView PlayTV card definition structure was missing initialization
> of the tuner_addr and radio_addr fields. As a result it was impossible to
> have the tuner initialized using parameters specified while loading the
> bttv.ko module. This regression became visible after the v4l rearrangements
> introduced somewhere around 2.6.15 kernel version. The root cause for the
> tuner initialization failure is located in the attach_inform function in
> the bttv-i2c.c file. There at the very beginning the addr variable holding
> the tuner device address is initialized with the value taken from the
> bttv_tvcards array. For the PixelView PlayTV card the tuner address field
> (and the radio address as well) was uninitialized, and thus equal 0. Later
> in that function execution of the TUNER_SET_TYPE_ADDR tuner command is
> guarded with check for the tuner address either equal ADDR_UNSET, or
> client->addr. Since both are non-zero (the latter in case of   the card
> owned by me at the runtime is equal 0x61) the TUNER_SET_TYPE_ADDR command
> is not executed, and consequently in the tuner_attach function in the
> tuner-core.c file call to i2c_attach_client does not result in assigning
> the tuner type variable with the requested value. Providing initialization
> of the tuner_addr and radio_addr with ADDR_UNSET values as it is already
> done for other tv cards defined in bttv-cards.c ensures that the tuner
> initialization is done correctly, just as it used to be in the 2.6.14
> kernel.
> 
> 
>         Developer's Certificate of Origin 1.1
> 
>         By making a contribution to this project, I certify that:
> 
>         (a) The contribution was created in whole or in part by me and I
>             have the right to submit it under the open source license
>             indicated in the file; or
> 
>         (b) The contribution is based upon previous work that, to the
> best
>             of my knowledge, is covered under an appropriate open source
>             license and I have the right under that license to submit
> that
>             work with modifications, whether created in whole or in part
>             by me, under the same open source license (unless I am
>             permitted to submit under a different license), as indicated
>             in the file; or
> 
>         (c) The contribution was provided directly to me by some other
>             person who certified (a), (b) or (c) and I have not modified
>             it.
> 
>         (d) I understand and agree that this project and the contribution
>             are public and that a record of the contribution (including
> all
>             personal information I submit with it, including my sign-off)
> is
>             maintained indefinitely and may be redistributed consistent
> with
>             this project or the open source license(s) involved.
> 
> 
>         Signed-off-by: Wojciech Migda <wojtek.golf@...eria.pl>
> 
> ---
> 
> --- drivers/media/video/bt8xx/bttv-cards.c.orig	2007-07-08
> 23:32:17.000000000 +0000
> +++ drivers/media/video/bt8xx/bttv-cards.c	2008-03-01 20:48:19.183306298
> +0000
> @@ -588,6 +588,8 @@ struct tvcard bttv_tvcards[] = {
>  		.needs_tvaudio	= 1,
>  		.pll		= PLL_28,
>  		.tuner_type	= -1,
> +		.tuner_addr	= ADDR_UNSET,
> +		.radio_addr	= ADDR_UNSET,
>  	},
>  	[BTTV_BOARD_WINVIEW_601] = {
>  		.name		= "Leadtek WinView 601",
> 
> 
> 
> 


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