From: Johannes Berg <johannes@sipsolutions.net>
To: Felix Fietkau <nbd@openwrt.org>
Cc: linux-wireless@vger.kernel.org
Subject: Re: [PATCH 2/2] mac80211: implement support for configuring antenna gain
Date: Mon, 07 Oct 2013 10:29:27 +0200 [thread overview]
Message-ID: <1381134567.13586.3.camel@jlt4.sipsolutions.net> (raw)
In-Reply-To: <524FF599.5040706@openwrt.org>
On Sat, 2013-10-05 at 13:18 +0200, Felix Fietkau wrote:
> > I understand. I don't understand the pieces about "max_antenna_gain".
> Right now ath9k has an antenna gain value in the EEPROM, and it compares
> it against the channel max_antenna_gain value.
I just don't understand what the max means. If I connect a 5dBi gain
antenna, but the "max antenna gain" is 3dBi, what should happen?
> Let's assume we have configured the tx power to the maximum value, the
> regdb allows 3 dB antenna gain, and the ath9k EEPROM contains an antenna
> gain of 3 dB as well.
> If we now add another 3 dB of user-configured antenna gain, it first
> starts tapping into the regulatory-allowed antenna gain before reducing
> tx power in mac80211. The driver needs to know about this, so I put the
> calculated maximum antenna gain into the hw conf as well.
I don't think it really works this way, does it? I don't believe the
"regulatory-allowed antenna gain" is really something that's allowed on
top of the EIRP?
johannes
next prev parent reply other threads:[~2013-10-07 8:29 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-06 13:06 [PATCH 1/2] cfg80211: add support for configuring antenna gain Felix Fietkau
2013-09-06 13:06 ` [PATCH 2/2] mac80211: implement " Felix Fietkau
2013-10-01 11:05 ` Johannes Berg
2013-10-01 11:14 ` Felix Fietkau
2013-10-01 11:50 ` Johannes Berg
2013-10-05 11:18 ` Felix Fietkau
2013-10-07 8:29 ` Johannes Berg [this message]
2013-10-07 8:30 ` Johannes Berg
2013-10-07 8:30 ` [wireless-regdb] " Johannes Berg
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1381134567.13586.3.camel@jlt4.sipsolutions.net \
--to=johannes@sipsolutions.net \
--cc=linux-wireless@vger.kernel.org \
--cc=nbd@openwrt.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.