From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753451AbcBVFyu (ORCPT ); Mon, 22 Feb 2016 00:54:50 -0500 Received: from mail-bl2nam02on0060.outbound.protection.outlook.com ([104.47.38.60]:32585 "EHLO NAM02-BL2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751796AbcBVFyq (ORCPT ); Mon, 22 Feb 2016 00:54:46 -0500 Authentication-Results: spf=pass (sender IP is 149.199.60.100) smtp.mailfrom=xilinx.com; vger.kernel.org; dkim=none (message not signed) header.d=none;vger.kernel.org; dmarc=bestguesspass action=none header.from=xilinx.com; From: Kedareswara rao Appana To: , , , , , , , , CC: , , Subject: [PATCH v2 3/4] dmaengine: xilinx_vdma: Fix issues with non-parking mode Date: Mon, 22 Feb 2016 11:24:36 +0530 Message-ID: <1456120477-32134-3-git-send-email-appanad@xilinx.com> X-Mailer: git-send-email 2.1.2 In-Reply-To: <1456120477-32134-1-git-send-email-appanad@xilinx.com> References: <1456120477-32134-1-git-send-email-appanad@xilinx.com> X-RCIS-Action: ALLOW X-TM-AS-Product-Ver: IMSS-7.1.0.1224-8.0.0.1202-22144.006 X-TM-AS-User-Approved-Sender: Yes;Yes X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:149.199.60.100;CTRY:US;IPV:NLI;EFV:NLI;SFV:NSPM;SFS:(10009020)(6009001)(2980300002)(438002)(189002)(199003)(5001770100001)(36386004)(33646002)(76176999)(5001960100002)(52956003)(50986999)(2950100001)(103686003)(86362001)(36756003)(50466002)(229853001)(106466001)(50226001)(87936001)(63266004)(2906002)(90966002)(5003940100001)(4326007)(92566002)(4001450100002)(46386002)(5008740100001)(11100500001)(6806005)(586003)(1096002)(1220700001)(42186005)(47776003)(45336002)(2201001)(189998001)(19580405001)(19580395003)(107986001)(2101003);DIR:OUT;SFP:1101;SCL:1;SRVR:BL2NAM02HT058;H:xsj-pvapsmtpgw02;FPR:;SPF:Pass;MLV:sfv;MX:1;A:1;LANG:en; MIME-Version: 1.0 Content-Type: text/plain X-MS-Office365-Filtering-Correlation-Id: 0ebfd110-c580-44b4-5112-08d33b4ca9bb X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:(8251501002);SRVR:BL2NAM02HT058; X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-Test: UriScan:(192813158149592); X-Exchange-Antispam-Report-CFA-Test: BCL:0;PCL:0;RULEID:(601004)(2401047)(8121501046)(13018025)(5005006)(13017025)(13023025)(13024025)(13015025)(10201501046)(3002001);SRVR:BL2NAM02HT058;BCL:0;PCL:0;RULEID:;SRVR:BL2NAM02HT058; X-Forefront-PRVS: 0860FE717F X-OriginatorOrg: xilinx.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Feb 2016 05:54:43.8675 (UTC) X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c;Ip=[149.199.60.100];Helo=[xsj-pvapsmtpgw02] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL2NAM02HT058 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch fixes issues with the Non-parking mode(Cirular mode). With the existing driver in cirular mode if we submit frames less than h/w configured we simply end-up having misconfigured vdma h/w. This patch fixes this issue by configuring the frame count register. Signed-off-by: Kedareswara rao Appana --- Changes for v2: ---> splitted the changes into multiple patches. drivers/dma/xilinx/xilinx_vdma.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/dma/xilinx/xilinx_vdma.c b/drivers/dma/xilinx/xilinx_vdma.c index d646218..8db07f7 100644 --- a/drivers/dma/xilinx/xilinx_vdma.c +++ b/drivers/dma/xilinx/xilinx_vdma.c @@ -645,6 +645,10 @@ static void xilinx_vdma_start_transfer(struct xilinx_vdma_chan *chan) else reg &= ~XILINX_VDMA_DMACR_FRAMECNT_EN; + /* Configure channel to allow number frame buffers */ + vdma_ctrl_write(chan, XILINX_VDMA_REG_FRMSTORE, + chan->desc_pendingcount); + /* * With SG, start with circular mode, so that BDs can be fetched. * In direct register mode, if not parking, enable circular mode -- 2.1.2