linux-kernel - Regression-broken V4L2 radio API for BTTV cards (PV951)

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Date:	Thu, 15 Dec 2011 14:41:44 +0200
From:	Roman Savochenko <rom_as@...ada.org>
To:	linux-kernel@...r.kernel.org
Subject: Regression-broken V4L2 radio API for BTTV cards (PV951)

Hello, All

Start from kernel 2.6.39 my TV card's PV951 radio is not work.
On 2.6.38 it still fine work and form 2.6.39 to present it is not.
I have seen to source's different for BTTV code from 2.6.38 to 2.6.39
and have not seen any functional changes then the problem is generic for
radio API.

For test I call command "v4l2-ctl -d /dev/radio --all -L" on 2.6.32 and
3.1.4 kernel's versions:

***************** 2.6.32 (OK) *************************
[root@...an ~]# v4l2-ctl -d /dev/radio --all -L
Driver Info (not using libv4l2):
        Driver name   : bttv
        Card type     : BT878 radio (ProVideo PV951)
        Bus info      : PCI:0000:01:09.0
        Driver version: 0.9.18
        Capabilities  : 0x00010000
                Tuner
Video input : 0 (Radio: ok)
Audio input : 0 (Radio)
Frequency: 1040500 (65.031250 MHz)
Tuner:
        Name                 : Radio
        Capabilities         : 62.5 Hz stereo
        Frequency range      : 65.0 MHz - 108.0 MHz
        Signal strength/AFC  : 13%/0
        Current audio mode   : stereo
        Available subchannels: mono
                           mute (bool) : default=0 value=0



***************** 3.1.4 (Wrong) *************************
[root@...an ~]# v4l2-ctl -d /dev/radio --all -L
Driver Info (not using libv4l2):
        Driver name   : bttv
        Card type     : BT878 radio (ProVideo PV951)
        Bus info      : PCI:0000:01:09.0
        Driver version: 3.1.4
        Capabilities  : 0x00010000
                Tuner
Video input : 0 (Radio: ok)
Audio input : 0 (Radio)
Frequency: 0 (0.000000 MHz)
Tuner:
        Name                 : Radio
        Capabilities         : 62.5 kHz
        Frequency range      : 0.0 MHz - 0.0 MHz
        Signal strength/AFC  : 0%/0
        Current audio mode   : mono
        Available subchannels:
                           mute (bool) : default=0 value=0


Regards, Roman
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