From cdb58b2bfe1dd62a3567aee3850aa9640b462f93 Mon Sep 17 00:00:00 2001 From: Daniel Golle Date: Fri, 8 Feb 2019 00:03:40 +0100 Subject: [PATCH] mac80211: rt2x00: reduce tx power to nominal level on RT6352 MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Current implementation of RT6352 support provides too high tx power at least on iPA/eLNA devices. Reduce amplification of variable gain amplifier by 6dB to match board target power of 17dBm. Transmited signal strength with this patch is similar to that of stock firmware or pandorabox firmware. Throughput measured with iperf improves. Device tested: Xiaomi Miwifi Mini. Signed-off-by: Tomislav Požega Signed-off-by: Daniel Golle --- ...-tx-power-to-nominal-level-on-RT6352.patch | 114 ++++++++++++++++++ 1 file changed, 114 insertions(+) create mode 100644 package/kernel/mac80211/patches/rt2x00/987-rt2x00-reduce-tx-power-to-nominal-level-on-RT6352.patch diff --git a/package/kernel/mac80211/patches/rt2x00/987-rt2x00-reduce-tx-power-to-nominal-level-on-RT6352.patch b/package/kernel/mac80211/patches/rt2x00/987-rt2x00-reduce-tx-power-to-nominal-level-on-RT6352.patch new file mode 100644 index 00000000000..f15fe7d8171 --- /dev/null +++ b/package/kernel/mac80211/patches/rt2x00/987-rt2x00-reduce-tx-power-to-nominal-level-on-RT6352.patch @@ -0,0 +1,114 @@ +From patchwork Thu Dec 27 14:05:25 2018 +Content-Type: text/plain; charset="utf-8" +MIME-Version: 1.0 +Content-Transfer-Encoding: 8bit +X-Patchwork-Submitter: Tom Psyborg +X-Patchwork-Id: 10743705 +X-Patchwork-Delegate: kvalo@adurom.com +Return-Path: +Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org + [172.30.200.125]) + by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2BC1913B5 + for ; + Thu, 27 Dec 2018 14:06:03 +0000 (UTC) +Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) + by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1C758289EC + for ; + Thu, 27 Dec 2018 14:06:03 +0000 (UTC) +Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) + id 0E022289ED; Thu, 27 Dec 2018 14:06:03 +0000 (UTC) +X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on + pdx-wl-mail.web.codeaurora.org +X-Spam-Level: +X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, + DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI + autolearn=ham version=3.3.1 +Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) + by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AE551289C6 + for ; + Thu, 27 Dec 2018 14:06:02 +0000 (UTC) +Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand + id S1729690AbeL0OFk (ORCPT + ); + Thu, 27 Dec 2018 09:05:40 -0500 +Received: from mail-wr1-f66.google.com ([209.85.221.66]:40863 "EHLO + mail-wr1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org + with ESMTP id S1729469AbeL0OFk (ORCPT + ); + Thu, 27 Dec 2018 09:05:40 -0500 +Received: by mail-wr1-f66.google.com with SMTP id p4so18360549wrt.7 + for ; + Thu, 27 Dec 2018 06:05:39 -0800 (PST) +DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; + d=gmail.com; s=20161025; + h=from:to:cc:subject:date:message-id:mime-version + :content-transfer-encoding; + bh=if95ASzOCk1n4rkrJMt0dbDI3WwTIiBNPf8RvdMIJm8=; + b=N78BHSW85OAzpxBdY2OozZyZYjAg6qKOe0l4D2qxSMPfU6K1kgB9f8YZs5Owl9wPyh + RC88Px2yQIdVDsFm3Kww1hEalZ+bN2zLqb5+mOWGMXJyEz7VHfWg6+hpYTjHMVohLkg5 + /+OqTEwl8P17YhXJ0KdEk0aHkt4uSi19pLqD+Jp6SzPPnIY+mx6ODeIAWHi3VH6alfre + plMwZa2EAMcOUCDCygy5ShCJWhXhdeL51VIfYowahUv7xowfw7o5b1+ZihX/DoKGuvHC + hNQAg9QvDOj6lqHyynD9V0pMgGYSVx2g6MPA8uH3vceV1/vgSkaWTxboyiUylHrlMdIo + xZCQ== +X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; + d=1e100.net; s=20161025; + h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version + :content-transfer-encoding; + bh=if95ASzOCk1n4rkrJMt0dbDI3WwTIiBNPf8RvdMIJm8=; + b=EyuukiKyMQhAsnvAdNATiSxgngxugcTEOlzcC2eOk78pzv8aNJdhWE3+cJLyh1ctj1 + Z/BoIXM298pOrkekyhEZsOnxwGO1p6mrgCBXdoANHvMk93fKtlYT8zNkMZdk6zdXSqBw + bSm8fD5pgGqoLBJH0swL1lrRkHUXSsBsQgCg1YQegfYoWCgdhAnKYmj3OJca5jqfTlJq + pL84CtNEgx9GiXNvsaTU8LeFmKU4GVoMmewsR9WRmw9zSoouDXciq0DHtAoBeElHlCjZ + /8LJQvSLqhONn5xIcFjUdsq3KcqZkCQedwF8WkwVgcA8uksMyKKH0Fj5txHAkeXIyHX3 + IhpA== +X-Gm-Message-State: AJcUukdCD27qMfzN5D3LfBblTlOINVVf3zsHMXqUaYwCxv/GoSStqEqb + ha65rhfifdjaR9/NVSakmWv3ZuEByO4= +X-Google-Smtp-Source: + ALg8bN4sgpNxIiBIAhaU8qSDeso9A0BqyR3EIwbO8UwBaShVrZZ2nAmG7p6zo63420r8KRFPizaXQA== +X-Received: by 2002:a5d:47d1:: with SMTP id + l17mr21936207wrs.319.1545919538745; + Thu, 27 Dec 2018 06:05:38 -0800 (PST) +Received: from localhost.localdomain ([31.147.208.18]) + by smtp.googlemail.com with ESMTPSA id + p6sm38219239wrx.50.2018.12.27.06.05.37 + (version=TLS1 cipher=AES128-SHA bits=128/128); + Thu, 27 Dec 2018 06:05:38 -0800 (PST) +From: =?utf-8?q?Tomislav_Po=C5=BEega?= +To: linux-wireless@vger.kernel.org +Cc: kvalo@codeaurora.org, hauke@hauke-m.de, nbd@nbd.name, + john@phrozen.org, sgruszka@redhat.com, daniel@makrotopia.org +Subject: [PATCH 1/2] rt2x00: reduce tx power to nominal level on RT6352 +Date: Thu, 27 Dec 2018 15:05:25 +0100 +Message-Id: <1545919526-4074-1-git-send-email-pozega.tomislav@gmail.com> +X-Mailer: git-send-email 1.7.0.4 +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Sender: linux-wireless-owner@vger.kernel.org +Precedence: bulk +List-ID: +X-Mailing-List: linux-wireless@vger.kernel.org +X-Virus-Scanned: ClamAV using ClamSMTP + +Current implementation of RT6352 support provides too high tx power +at least on iPA/eLNA devices. Reduce amplification of variable gain +amplifier by 6dB to match board target power of 17dBm. +Transmited signal strength with this patch is similar to that of +stock firmware or pandorabox firmware. Throughput measured with iperf +improves. Device tested: Xiaomi Miwifi Mini. + +Signed-off-by: Tomislav Požega +--- + drivers/net/wireless/ralink/rt2x00/rt2800lib.c | 2 +- + 1 files changed, 1 insertions(+), 1 deletions(-) + +--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c ++++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c +@@ -5814,7 +5814,7 @@ static int rt2800_init_registers(struct + rt2800_register_write(rt2x00dev, TX_SW_CFG2, 0x00000000); + rt2800_register_write(rt2x00dev, MIMO_PS_CFG, 0x00000002); + rt2800_register_write(rt2x00dev, TX_PIN_CFG, 0x00150F0F); +- rt2800_register_write(rt2x00dev, TX_ALC_VGA3, 0x06060606); ++ rt2800_register_write(rt2x00dev, TX_ALC_VGA3, 0x00000000); + rt2800_register_write(rt2x00dev, TX0_BB_GAIN_ATTEN, 0x0); + rt2800_register_write(rt2x00dev, TX1_BB_GAIN_ATTEN, 0x0); + rt2800_register_write(rt2x00dev, TX0_RF_GAIN_ATTEN, 0x6C6C666C); -- 2.30.2