From patchwork Fri Oct 12 17:01:22 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 10638955 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 102F514E2 for ; Fri, 12 Oct 2018 17:01:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F18822C26F for ; Fri, 12 Oct 2018 17:01:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D904E2C1CE; Fri, 12 Oct 2018 17:01:27 +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=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 7A5A12C234 for ; Fri, 12 Oct 2018 17:01:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727315AbeJMAev (ORCPT ); Fri, 12 Oct 2018 20:34:51 -0400 Received: from heliosphere.sirena.org.uk ([172.104.155.198]:48182 "EHLO heliosphere.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725854AbeJMAev (ORCPT ); Fri, 12 Oct 2018 20:34:51 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sirena.org.uk; s=20170815-heliosphere; h=Date:Message-Id:In-Reply-To: Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:References: List-Id:List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner: List-Archive; bh=e0tKQoPjX6arYivFw4R58uuODCvkWhHb/g/bVX9Umjk=; b=Tx4lS0Dic7gm domjuQyKdqfAPKENRHnmb3Xnw471rOTd9shibXnDIYaFppe5RWwQxzf8evhYfpitILS+EaymSC9IA sI94kl1kV+OjEk7IQZu9dE+mNjSvU2amMEZ0HcjC7j8bbJ9p2Ta05ZY6rdgb6IX0Kpf9wSaK1sBDB Mwrr0=; Received: from [91.126.136.150] (helo=finisterre.ee.mobilebroadband) by heliosphere.sirena.org.uk with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1gB0oV-0006eQ-9A; Fri, 12 Oct 2018 17:01:23 +0000 Received: by finisterre.ee.mobilebroadband (Postfix, from userid 1000) id C66EC440078; Fri, 12 Oct 2018 19:01:22 +0200 (CEST) From: Mark Brown To: Robin Gong Cc: Mark Brown , "broonie@kernel.org" , "maxime.chevallier@bootlin.com" , "linux-spi@vger.kernel.org" , "linux-kernel@vger.kernel.org" , dl-linux-imx , linux-spi@vger.kernel.org Subject: Applied "spi: imx: use PIO mode if size is small" to the spi tree In-Reply-To: <1539196453-8704-4-git-send-email-yibin.gong@nxp.com> Message-Id: <20181012170122.C66EC440078@finisterre.ee.mobilebroadband> Date: Fri, 12 Oct 2018 19:01:22 +0200 (CEST) Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The patch spi: imx: use PIO mode if size is small has been applied to the spi tree at https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark From 133eb8e38b02c6c63a039523fca12737009a6686 Mon Sep 17 00:00:00 2001 From: Robin Gong Date: Wed, 10 Oct 2018 10:32:48 +0000 Subject: [PATCH] spi: imx: use PIO mode if size is small Use PIO mode instead if size is smaller than fifo size, since dma may be less efficient. Signed-off-by: Robin Gong Signed-off-by: Mark Brown --- drivers/spi/spi-imx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 037abbb852a4..dd1ce12aa386 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -224,6 +224,9 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi, if (spi_imx->slave_mode) return false; + if (transfer->len < spi_imx->devtype_data->fifo_size) + return false; + spi_imx->dynamic_burst = 0; return true;