Re: [linux-dvb] Support of Nova S SE DVB card missing

[Eberhard Kaltenhaeuser <ke2705@gmx.de>]

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Hi Patrick,

sorry, actually, i have no environment to compile drivers or kernels.

Eberhard


Patrick Boettcher schrieb:
> Hi Hartmut and Eberhard,
>
> thanks for pointing that out, I almost overlooked the previous mail from 
> Eberhard.
>
> Eberhard, are you able to try patches and to compile your own drivers in 
> order to help finding the best solution.
>
> One option is to put back the original code in case the 
> repeated-start-workaround is not set. But this one looks not very 
> protected. I mean between the two i2c_transfer-calls something else could 
> happen.
>
> Is there no other mean to tell to the i2c-adapter to do a repeated start 
> within one i2c_transfer-call?
>
> Another option would be to try to set the "repeated_start_workaround" 
> option also for the Nova SE card.
>
> What do you think?
>
> Patrick.
>
> --
>    Mail: patrick.boettcher@desy.de
>    WWW:  http://www.wi-bw.tfh-wildau.de/~pboettch/
>
>
> On Sat, 23 Aug 2008, e9hack wrote:
>
>   
>> Eberhard Kaltenhaeuser schrieb:
>>     
>>> Actual kernel does not support the Hauppauge WinTV Nova S SE PCI card
>>> anymore:
>>>
>>>       
>> I think it is a problem of this changeset http://linuxtv.org/hg/v4l-dvb/rev/358d281e6a3d
>> from Patrick Boettcher. The S5H1420 isn't able to understand repeated start conditions.
>> The i2c-read code was changed from:
>>
>> 	if ((ret = i2c_transfer (state->i2c, &msg1, 1)) != 1)
>> 		return ret;
>>
>> 	if ((ret = i2c_transfer (state->i2c, &msg2, 1)) != 1)
>> 		return ret;
>>
>> to:
>> 	if (state->config->repeated_start_workaround) {
>> 		ret = i2c_transfer(state->i2c, msg, 3);
>> 		if (ret != 3)
>> 			return ret;
>> 	} else {
>> 		ret = i2c_transfer(state->i2c, &msg[1], 2);
>> 		if (ret != 2)
>> 			return ret;
>> 	}
>>
>> -Hartmut
>>
>>     
>
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>
>   

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