[vdr] power consumption, powertop and wakups per second with a af9015 device

Heinrich Langos henrik-vdr at prak.org
Mon Mar 16 18:24:57 CET 2009


On Mon, Mar 16, 2009 at 05:23:53PM +0200, Antti Palosaari wrote:
> Heinrich Langos wrote:
>> On Mon, Mar 16, 2009 at 03:07:21PM +0100, Heinrich Langos wrote:
>>> On Mon, Mar 16, 2009 at 02:19:30PM +0200, Antti Palosaari wrote:
>>>> remote=0 does not disable polling, it is for selecting correct remote.
>>> Well, setting remote=0 does have an effect (af9015.c):
>>>
>>>                 if (val == AF9015_IR_MODE_DISABLED || val == 0x04) {
>>>                         af9015_properties[i].rc_key_map = NULL;
>>>                         af9015_properties[i].rc_key_map_size  = 0;
>
> val is read from eeprom, there is byte in eeprom which tells whether  
> device have remote or not. If eeprom says no remote then polling is  
> disabled.
> If you look more carefully there is if-else condition which goes:
> if (eeprom remote disabled)
>   * disable remote
> else if (module param remote defined)
>   * load ir-table defined as module param
> else
>   * load ir-table according to USB-ID
>

You are right. Sorry I didn't read that carefully enough.

> I am not sure what happens if device have remote but ir-table is not  
> selected by if-else. Probably .rc_key_map_size leaves to 0 and remote  
> polling is disabled.

Thats exactly what happens. Though, I didn't see a place where
af9015_properties[i]rc_key_map is initalized. Maybe a sanity check 
for the "remote" module parameter should be added? Telling the user that 
he uses an invalid value could help new users.

> Anyhow, this problem is not af9015 specified. Most dvb-usb -drivers have  
> just similar implementation. rc-polling is provided by dvb-usb-core.

Right again. Sorry to bother you.

>> Anyway .. the main problem remains. 
>>
>> Is there a tool that would only do some minimal actions on a dvb 
>> device? 
>
> Like power_on? femon for example reads device status. zap, scan...

Yeap. Thank you for that list. I'll take a look at those and see what I can
find out.

Cheers and thank you very much for your help!
-henrik





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