On Tuesday, 11 June 2019 08:38:52 CEST Lorenzo Bianconi wrote:
> + switch (n_chains) {
> + case 4:
> + target_power += 6;
> + break;
> + case 3:
> + target_power += 4;
> + break;
> + case 2:
> + target_power += 3;
> + break;
> + default:
> + break;
> + }
Any reason why you use different value for 3 chains than ath9k? Following
values are used in ath9k:
* 1 chain: 0 dB
* 2 chains: 3 dB (max combined gain ~3.010299956639812 dB)
* 3 chains: 5 dB (max combined gain ~4.771212547196624 dB)
* 4 chains: not supported (max combined gain 6.020599913279624 dB)
Here are the definitions from ath9k (values are saved in .5 dB steps)
drivers/net/wireless/ath/ath9k/eeprom.h:#define POWER_CORRECTION_FOR_TWO_CHAIN 6 /* 10*log10(2)*2 */
drivers/net/wireless/ath/ath9k/eeprom.h:#define POWER_CORRECTION_FOR_THREE_CHAIN 10 /* 10*log10(3)*2 */
Kind regards,
Sven
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