From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751987AbaLPVGY (ORCPT ); Tue, 16 Dec 2014 16:06:24 -0500 Received: from mail-ie0-f202.google.com ([209.85.223.202]:51993 "EHLO mail-ie0-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751837AbaLPVFu (ORCPT ); Tue, 16 Dec 2014 16:05:50 -0500 From: Andrew Bresticker To: Mark Brown Cc: Sifan Naeem , linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, Andrew Bresticker Subject: [PATCH 3/3] spi: img-spfi: Increase DMA burst size Date: Tue, 16 Dec 2014 13:05:46 -0800 Message-Id: <1418763946-22260-3-git-send-email-abrestic@chromium.org> X-Mailer: git-send-email 2.2.0.rc0.207.ga3a616c In-Reply-To: <1418763946-22260-1-git-send-email-abrestic@chromium.org> References: <1418763946-22260-1-git-send-email-abrestic@chromium.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org A 1-byte burst size is rather inefficient and has been shown to cause TX issues during testing. Increase the DMA burst size to 4-bytes for both RX and TX DMA when using the 8-bit FIFO. Signed-off-by: Andrew Bresticker --- drivers/spi/spi-img-spfi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-img-spfi.c b/drivers/spi/spi-img-spfi.c index 2b29df0..29b97f8 100644 --- a/drivers/spi/spi-img-spfi.c +++ b/drivers/spi/spi-img-spfi.c @@ -336,7 +336,7 @@ static int img_spfi_start_dma(struct spi_master *master, } else { rxconf.src_addr = spfi->phys + SPFI_RX_8BIT_VALID_DATA; rxconf.src_addr_width = 1; - rxconf.src_maxburst = 1; + rxconf.src_maxburst = 4; } dmaengine_slave_config(spfi->rx_ch, &rxconf); @@ -360,7 +360,7 @@ static int img_spfi_start_dma(struct spi_master *master, } else { txconf.dst_addr = spfi->phys + SPFI_TX_8BIT_VALID_DATA; txconf.dst_addr_width = 1; - txconf.dst_maxburst = 1; + txconf.dst_maxburst = 4; } dmaengine_slave_config(spfi->tx_ch, &txconf); -- 2.2.0.rc0.207.ga3a616c