From patchwork Mon Feb 23 12:26:18 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamil Debski X-Patchwork-Id: 5865251 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 51CAA9F269 for ; Mon, 23 Feb 2015 12:26:44 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7BDBD20630 for ; Mon, 23 Feb 2015 12:26:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A324320634 for ; Mon, 23 Feb 2015 12:26:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752316AbbBWM0k (ORCPT ); Mon, 23 Feb 2015 07:26:40 -0500 Received: from mailout4.samsung.com ([203.254.224.34]:13353 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751974AbbBWM0i (ORCPT ); Mon, 23 Feb 2015 07:26:38 -0500 Received: from epcpsbgm1.samsung.com (epcpsbgm1 [203.254.230.26]) by mailout4.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0NK8006JB58DXSB0@mailout4.samsung.com> for linux-media@vger.kernel.org; Mon, 23 Feb 2015 21:26:37 +0900 (KST) X-AuditID: cbfee61a-f79c06d000004e71-49-54eb1c7d97cf Received: from epmmp2 ( [203.254.227.17]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id EA.BF.20081.D7C1BE45; Mon, 23 Feb 2015 21:26:37 +0900 (KST) Received: from AMDC1342.digital.local ([106.116.147.39]) by mmp2.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0NK800466582UK90@mmp2.samsung.com>; Mon, 23 Feb 2015 21:26:37 +0900 (KST) From: Kamil Debski To: linux-media@vger.kernel.org Cc: m.szyprowski@samsung.com, k.debski@samsung.com, hverkuil@xs4all.nl Subject: [PATCH v6 3/4] coda: set allow_zero_bytesused flag for vb2_queue_init Date: Mon, 23 Feb 2015 13:26:18 +0100 Message-id: <1424694379-11115-3-git-send-email-k.debski@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1424694379-11115-1-git-send-email-k.debski@samsung.com> References: <1424694379-11115-1-git-send-email-k.debski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrBJMWRmVeSWpSXmKPExsVy+t9jQd1amdchBnd2GlqcmvyMyeLH6wts Fj0btrJarD1yl92BxaNvyypGj8+b5DxOff3MHsAcxWWTkpqTWZZapG+XwJWxZHtuwWGuiv3z pzE2MD7h6GLk5JAQMJF4/+AeK4QtJnHh3nq2LkYuDiGB6YwS626dZoFwOpgkNl/9AeRwcLAJ aEqsuucB0iAiIC/xpPcGG4jNLOAmMe/vVjBbWMBP4v2v14wgNouAqsTb3deZQWxeAReJBW92 M4OMkRBQkJgzyQYkzCngKnH8xXR2EFsIqORTxw2mCYy8CxgZVjGKphYkFxQnpeca6hUn5haX 5qXrJefnbmIEh8czqR2MKxssDjEKcDAq8fA25L4KEWJNLCuuzD3EKMHBrCTCK/0TKMSbklhZ lVqUH19UmpNafIhRmoNFSZxXyb4tREggPbEkNTs1tSC1CCbLxMEp1cAYYHkgSf6pVlIEU6jd 6b0aUeyvE70eph8rqjQtLDTcdnSv7JuU0NtPLC7a/nbl+NcVoqR27u99z5ffVfWj6nua0th8 dn95XeO15iG34AJLVhWdV1M3vNIQMcuev8T77vv3CQnXtD9eyH37mylE2tnacssk+wcr/37f fl9f5dTPza0fHXIO8nxWYinOSDTUYi4qTgQAoqAeUwsCAAA= Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The coda driver interprets a buffer with bytesused equal to 0 as a special case indicating end-of-stream. After vb2: fix bytesused == 0 handling (8a75ffb) patch videobuf2 modified the value of bytesused if it was 0. The allow_zero_bytesused flag was added to videobuf2 to keep backward compatibility. Signed-off-by: Kamil Debski --- drivers/media/platform/coda/coda-common.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/media/platform/coda/coda-common.c b/drivers/media/platform/coda/coda-common.c index 6f32e6d..329c2a4 100644 --- a/drivers/media/platform/coda/coda-common.c +++ b/drivers/media/platform/coda/coda-common.c @@ -1541,6 +1541,13 @@ static int coda_queue_init(struct coda_ctx *ctx, struct vb2_queue *vq) vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; vq->lock = &ctx->dev->dev_mutex; + /* One way to indicate end-of-stream for coda is to set the + * bytesused == 0. However by default videobuf2 handles bytesused + * equal to 0 as a special case and changes its value to the size + * of the buffer. Set the allow_zero_bytesused flag, so + * that videobuf2 will keep the value of bytesused intact. + */ + vq->allow_zero_bytesused = 1; return vb2_queue_init(vq); }