From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Tue, 07 Aug 2018 13:44:42 +0200 (CEST) Received: from outils.crapouillou.net ([89.234.176.41]:39102 "EHLO crapouillou.net" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S23994695AbeHGLmiQXpMB (ORCPT ); Tue, 7 Aug 2018 13:42:38 +0200 From: Paul Cercueil To: Vinod Koul , Rob Herring , Mark Rutland , Ralf Baechle , Paul Burton , James Hogan , Zubair Lutfullah Kakakhel Cc: Paul Cercueil , dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@linux-mips.org Subject: [PATCH v4 10/18] dmaengine: dma-jz4780: Enable Fast DMA to the AIC Date: Tue, 7 Aug 2018 13:42:10 +0200 Message-Id: <20180807114218.20091-11-paul@crapouillou.net> In-Reply-To: <20180807114218.20091-1-paul@crapouillou.net> References: <20180807114218.20091-1-paul@crapouillou.net> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=crapouillou.net; s=mail; t=1533642157; bh=eiUOmW3tAutUTASBDPdhm67AII/Vgxt1HbD0ikyWV4M=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=Lixiz9SQcKIzwbZWeg3/WseFwtvwCaIFyY84Fu2FHM9q/LocISeOClDS6V13wiYL5jpYSJWx1K9OdpULBw2YkDvHxpOf/g3x5X2tg6K3BqeHepiw9J4wg3QFcwjxRt6uUuIom2TPE6sIe0x/P/8fPCzhAbXWk9xQvWSX02Q038Y= Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 65457 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: paul@crapouillou.net Precedence: bulk List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: linux-mips X-List-ID: linux-mips List-subscribe: List-owner: List-post: List-archive: X-list: linux-mips With the fast DMA bit set, the DMA will transfer twice as much data per clock period to the AIC, so there is little point not to set it. Signed-off-by: Paul Cercueil Tested-by: Mathieu Malaterre Reviewed-by: PrasannaKumar Muralidharan --- drivers/dma/dma-jz4780.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) v2: No change v3: No change v4: No change diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c index 565971c2a33c..3a4d0a4b550d 100644 --- a/drivers/dma/dma-jz4780.c +++ b/drivers/dma/dma-jz4780.c @@ -52,6 +52,7 @@ #define JZ_DMA_DMAC_DMAE BIT(0) #define JZ_DMA_DMAC_AR BIT(2) #define JZ_DMA_DMAC_HLT BIT(3) +#define JZ_DMA_DMAC_FAIC BIT(27) #define JZ_DMA_DMAC_FMSC BIT(31) #define JZ_DMA_DRT_AUTO 0x8 @@ -923,8 +924,8 @@ static int jz4780_dma_probe(struct platform_device *pdev) * Also set the FMSC bit - it increases MSC performance, so it makes * little sense not to enable it. */ - jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DMAC, - JZ_DMA_DMAC_DMAE | JZ_DMA_DMAC_FMSC); + jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DMAC, JZ_DMA_DMAC_DMAE | + JZ_DMA_DMAC_FAIC | JZ_DMA_DMAC_FMSC); if (soc_data->flags & JZ_SOC_DATA_PROGRAMMABLE_DMA) jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DMACP, 0); -- 2.11.0