Re: [PATCH] cx231xx: remove direct register PWR_CTL_EN modification that switches port3

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On 31.10.2014 11:32, Mauro Carvalho Chehab wrote:
> Em Thu, 30 Oct 2014 23:43:55 +0100
> Matthias Schwarzott <zzam@xxxxxxxxxx> escreveu:
> 
>> The only remaining place that modifies the relevant bit is in function
>> cx231xx_set_Colibri_For_LowIF
>>
>> Signed-off-by: Matthias Schwarzott <zzam@xxxxxxxxxx>
>> ---
>>  drivers/media/usb/cx231xx/cx231xx-avcore.c | 3 +--
>>  1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/drivers/media/usb/cx231xx/cx231xx-avcore.c b/drivers/media/usb/cx231xx/cx231xx-avcore.c
>> index b56bc87..781908b 100644
>> --- a/drivers/media/usb/cx231xx/cx231xx-avcore.c
>> +++ b/drivers/media/usb/cx231xx/cx231xx-avcore.c
>> @@ -2270,7 +2270,6 @@ int cx231xx_set_power_mode(struct cx231xx *dev, enum AV_MODE mode)
>>  	case POLARIS_AVMODE_ANALOGT_TV:
>>  
>>  		tmp |= PWR_DEMOD_EN;
>> -		tmp |= (I2C_DEMOD_EN);
>>  		value[0] = (u8) tmp;
>>  		value[1] = (u8) (tmp >> 8);
>>  		value[2] = (u8) (tmp >> 16);
>> @@ -2366,7 +2365,7 @@ int cx231xx_set_power_mode(struct cx231xx *dev, enum AV_MODE mode)
>>  		}
>>  
>>  		tmp &= (~PWR_AV_MODE);
>> -		tmp |= POLARIS_AVMODE_DIGITAL | I2C_DEMOD_EN;
>> +		tmp |= POLARIS_AVMODE_DIGITAL;
>>  		value[0] = (u8) tmp;
>>  		value[1] = (u8) (tmp >> 8);
>>  		value[2] = (u8) (tmp >> 16);
> 

Hi Mauro,

> Hmm... Not sure if this patch is right. There is one I2C bus internally
> at cx231xx. Some configurations need to go through this I2C bus. 
> 

What exactly do you mean by configurations need to go through this I2C
bus? Do you mean the port3 switch must have a specific value even when
not doing i2c transfers?

> Did you test if changing from/to analog/digital mode is working?
> 

I did not yet check analog mode.

Regards
Matthias

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