From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 16968C43381 for ; Wed, 27 Mar 2019 19:21:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D656B2075C for ; Wed, 27 Mar 2019 19:21:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553714494; bh=KOGOp3ldPjr4JtCcwcVP85HBy2aF0BSnCQGL2u0y3aA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=AVf/YMPzdqkiSWfznB08hY3QSLdt6P8kcRDz/bcoDcGLyKXUoIxTh1KsPmKZITMbC YaKPQ2ZCPH+Jnp9glwuKO0AUsNU20omOVIUYe9GBtdORw6703lWxB04A86OFkqHM53 zhfsCrNVNS2lHrC1r2sOY00v58QkT/TO9MtSr8XE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388209AbfC0TVc (ORCPT ); Wed, 27 Mar 2019 15:21:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:48656 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732699AbfC0SGx (ORCPT ); Wed, 27 Mar 2019 14:06:53 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 47513217F9; Wed, 27 Mar 2019 18:06:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553710012; bh=KOGOp3ldPjr4JtCcwcVP85HBy2aF0BSnCQGL2u0y3aA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=L7pa/XExevGRpbRdZHTzrzrMLBp0QSXOviaTxXEuQ5sXCh/cDL8q7+LRJIIGpIgQB PVm+BpMAu2iwoMWV3VY0ZQmTNaQ1QNtLSpbkuDnKvEGrmq7G1Wq/Wfd2lriKr9lChu 3ORJY9WvYGny/i/bTpgOdRkO647HzJBGFRWXPUkY= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Martin Blumenstingl , Emiliano Ingrassia , =?UTF-8?q?Linus=20L=C3=BCssing?= , Kevin Hilman , Sasha Levin , devicetree@vger.kernel.org, linux-amlogic@lists.infradead.org Subject: [PATCH AUTOSEL 5.0 155/262] ARM: dts: meson8b: fix the Ethernet data line signals in eth_rgmii_pins Date: Wed, 27 Mar 2019 14:00:10 -0400 Message-Id: <20190327180158.10245-155-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190327180158.10245-1-sashal@kernel.org> References: <20190327180158.10245-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Martin Blumenstingl [ Upstream commit 29f0023d01f063feacfc404f0446905aee4f82ee ] According to the Odroid-C1+ schematics the Ethernet TXD1 signal is routed to GPIOH_5 and the TXD0 signal is routed to GPIOH_6. The public S805 datasheet shows that TXD0 can be routed to DIF_2_P and TXD1 can be routed to DIF_2_N instead. The pin groups eth_txd0_0 (GPIOH_6) and eth_txd0_1 (DIF_2_P) are both configured as Ethernet TXD0 and TXD1 data lines in meson8b.dtsi. At the same time eth_txd1_0 (GPIOH_5) and eth_txd1_1 (DIF_2_N) are configured as TXD0 and TXD1 data lines as well. This results in a bad Ethernet receive performance. Presumably this is due to the eth_txd0 and eth_txd1 signal being routed to the wrong pins. As a result of that data can only be transmitted on eth_txd2 and eth_txd3. However, I have no scope to fully confirm this assumption. The vendor u-boot sources for Odroid-C1 use the following Ethernet pinmux configuration: SET_CBUS_REG_MASK(PERIPHS_PIN_MUX_6, 0x3f4f); SET_CBUS_REG_MASK(PERIPHS_PIN_MUX_7, 0xf00000); This translates to the following pin groups in the mainline kernel: - register 6 bit 0: eth_rxd1 (DIF_0_P) - register 6 bit 1: eth_rxd0 (DIF_0_N) - register 6 bit 2: eth_rx_dv (DIF_1_P) - register 6 bit 3: eth_rx_clk (DIF_1_N) - register 6 bit 6: eth_tx_en (DIF_3_P) - register 6 bit 8: eth_ref_clk (DIF_3_N) - register 6 bit 9: eth_mdc (DIF_4_P) - register 6 bit 10: eth_mdio_en (DIF_4_N) - register 6 bit 11: eth_tx_clk (GPIOH_9) - register 6 bit 12: eth_txd2 (GPIOH_8) - register 6 bit 13: eth_txd3 (GPIOH_7) - register 7 bit 20: eth_txd0_0 (GPIOH_6) - register 7 bit 21: eth_txd1_0 (GPIOH_5) - register 7 bit 22: eth_rxd3 (DIF_2_P) - register 7 bit 23: eth_rxd2 (DIF_2_N) Drop the eth_txd0_1 and eth_txd1_1 groups from eth_rgmii_pins to fix the Ethernet transmit performance on Odroid-C1. Also add the eth_rxd2 and eth_rxd3 groups so we don't rely on the bootloader to set them up. iperf3 statistics before this change: - transmitting from Odroid-C1: 741 Mbits/sec (0 retries) - receiving on Odroid-C1: 199 Mbits/sec (1713 retries) iperf3 statistics after this change: - transmitting from Odroid-C1: 667 Mbits/sec (0 retries) - receiving on Odroid-C1: 750 Mbits/sec (0 retries) Fixes: b96446541d8390 ("ARM: dts: meson8b: extend ethernet controller description") Signed-off-by: Martin Blumenstingl Cc: Emiliano Ingrassia Cc: Linus Lüssing Tested-by: Emiliano Ingrassia Reviewed-by: Emiliano Ingrassia Signed-off-by: Kevin Hilman Signed-off-by: Sasha Levin --- arch/arm/boot/dts/meson8b.dtsi | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/arm/boot/dts/meson8b.dtsi b/arch/arm/boot/dts/meson8b.dtsi index 22d775460767..dc125769fe85 100644 --- a/arch/arm/boot/dts/meson8b.dtsi +++ b/arch/arm/boot/dts/meson8b.dtsi @@ -270,9 +270,7 @@ groups = "eth_tx_clk", "eth_tx_en", "eth_txd1_0", - "eth_txd1_1", "eth_txd0_0", - "eth_txd0_1", "eth_rx_clk", "eth_rx_dv", "eth_rxd1", @@ -281,7 +279,9 @@ "eth_mdc", "eth_ref_clk", "eth_txd2", - "eth_txd3"; + "eth_txd3", + "eth_rxd3", + "eth_rxd2"; function = "ethernet"; bias-disable; }; -- 2.19.1