From patchwork Wed Jul 22 06:52:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jon Lin X-Patchwork-Id: 11677471 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0A6B513A4 for ; Wed, 22 Jul 2020 06:53:15 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D6B08206C1 for ; Wed, 22 Jul 2020 06:53:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="JieraC3k" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D6B08206C1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=rock-chips.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:MIME-Version:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Owner; bh=9sOrVdbzz04oO7mmhXs9hFL19NzWRRbVKKaxWb2cM2I=; b=JieraC3kUk67HTwsM6k27ND9cj Ey45evAEGbvs2wZDbCUrvwJ8Dc/hCsIIlQ0Bl20ZAnqY2XUMYN/Z2mV4P8eafdtfXUs+2H/WA/KFD tlev8wKRGhNyd2dCY5XClDjzC3lmpMT65aMYSUQ+lJmAa791fXn5pcRY8YOtI+9gmA5lXxw1IfRtM TQ+aB09vC3wWEztutz6xRDTZdI3M6pTJ5T26Z8/VHtqdG9wogCel96+BXBiizQGZRGQtqP0JfpFBv GK7e2pN5JimpElB8nfbv+UOHmrPQBXgOiMpmP68XsiaTk4I5VjW38BoLFH3JU9+OJeNqWEuuVEU6V 9Lc621zw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jy8cq-0006CU-JG; Wed, 22 Jul 2020 06:53:12 +0000 Received: from lucky1.263xmail.com ([211.157.147.135]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jy8cl-0006Ap-0x; Wed, 22 Jul 2020 06:53:08 +0000 Received: from localhost (unknown [192.168.167.16]) by lucky1.263xmail.com (Postfix) with ESMTP id 12E65A186D; Wed, 22 Jul 2020 14:53:00 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-ANTISPAM-LEVEL: 2 X-ABS-CHECKED: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P18585T140686821160704S1595400779440716_; Wed, 22 Jul 2020 14:53:00 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: X-RL-SENDER: jon.lin@rock-chips.com X-SENDER: jon.lin@rock-chips.com X-LOGIN-NAME: jon.lin@rock-chips.com X-FST-TO: broonie@kernel.org X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-DNS-TYPE: 0 X-System-Flag: 0 From: Jon Lin To: broonie@kernel.org Subject: [PATCH v1 1/3] spi: rockchip: Config spi rx dma burst size depend on xfer length Date: Wed, 22 Jul 2020 14:52:55 +0800 Message-Id: <20200722065257.17943-1-jon.lin@rock-chips.com> X-Mailer: git-send-email 2.17.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200722_025307_341283_B2F94888 X-CRM114-Status: GOOD ( 12.51 ) X-Spam-Score: 1.5 (+) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (1.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [211.157.147.135 listed in list.dnswl.org] 1.5 RCVD_IN_SORBS_WEB RBL: SORBS: sender is an abusable web server [58.22.7.114 listed in dnsbl.sorbs.net] -0.0 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [211.157.147.135 listed in wl.mailspike.net] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 T_SPF_PERMERROR SPF: test of record failed (permerror) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: heiko@sntech.de, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, linux-rockchip@lists.infradead.org, Jon Lin , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org The burst length can be adjusted according to the transmission length to improve the transmission rate Signed-off-by: Jon Lin --- drivers/spi/spi-rockchip.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index 9b8a5e1233c0..63593a5b87fa 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -384,6 +384,19 @@ static void rockchip_spi_dma_txcb(void *data) spi_finalize_current_transfer(ctlr); } +static u32 rockchip_spi_calc_burst_size(u32 data_len) +{ + u32 i; + + /* burst size: 1, 2, 4, 8 */ + for (i = 1; i < 8; i <<= 1) { + if (data_len & i) + break; + } + + return i; +} + static int rockchip_spi_prepare_dma(struct rockchip_spi *rs, struct spi_controller *ctlr, struct spi_transfer *xfer) { @@ -397,7 +410,8 @@ static int rockchip_spi_prepare_dma(struct rockchip_spi *rs, .direction = DMA_DEV_TO_MEM, .src_addr = rs->dma_addr_rx, .src_addr_width = rs->n_bytes, - .src_maxburst = 1, + .src_maxburst = rockchip_spi_calc_burst_size(xfer->len / + rs->n_bytes), }; dmaengine_slave_config(ctlr->dma_rx, &rxconf); @@ -525,7 +539,8 @@ static void rockchip_spi_config(struct rockchip_spi *rs, writel_relaxed(rs->fifo_len / 2 - 1, rs->regs + ROCKCHIP_SPI_RXFTLR); writel_relaxed(rs->fifo_len / 2, rs->regs + ROCKCHIP_SPI_DMATDLR); - writel_relaxed(0, rs->regs + ROCKCHIP_SPI_DMARDLR); + writel_relaxed(rockchip_spi_calc_burst_size(xfer->len / rs->n_bytes) - 1, + rs->regs + ROCKCHIP_SPI_DMARDLR); writel_relaxed(dmacr, rs->regs + ROCKCHIP_SPI_DMACR); /* the hardware only supports an even clock divisor, so