From patchwork Thu Feb 19 15:40:49 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamil Debski X-Patchwork-Id: 5852381 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 12EF9BF440 for ; Thu, 19 Feb 2015 15:41:14 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3C85B20160 for ; Thu, 19 Feb 2015 15:41:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 69FE82028D for ; Thu, 19 Feb 2015 15:41:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751934AbbBSPlI (ORCPT ); Thu, 19 Feb 2015 10:41:08 -0500 Received: from mailout1.samsung.com ([203.254.224.24]:24121 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751559AbbBSPlG (ORCPT ); Thu, 19 Feb 2015 10:41:06 -0500 Received: from epcpsbgm1.samsung.com (epcpsbgm1 [203.254.230.26]) by mailout1.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0NK0007Q8ZKH4Z80@mailout1.samsung.com> for linux-media@vger.kernel.org; Fri, 20 Feb 2015 00:41:05 +0900 (KST) X-AuditID: cbfee61a-f79c06d000004e71-1d-54e604110595 Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id A4.1F.20081.11406E45; Fri, 20 Feb 2015 00:41:05 +0900 (KST) Received: from AMDC1342.digital.local ([106.116.147.39]) by mmp1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0NK000BKNZK7RU60@mmp1.samsung.com>; Fri, 20 Feb 2015 00:41:05 +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 v4 3/4] coda: set allow_zero_bytesused flag for vb2_queue_init Date: Thu, 19 Feb 2015 16:40:49 +0100 Message-id: <1424360450-13048-3-git-send-email-k.debski@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1424360450-13048-1-git-send-email-k.debski@samsung.com> References: <1424360450-13048-1-git-send-email-k.debski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrBJMWRmVeSWpSXmKPExsVy+t9jAV1BlmchBnu6uSxOTX7GZPHj9QU2 i54NW1kt1h65y+7A4tG3ZRWjx+dNch6nvn5mD2CO4rJJSc3JLEst0rdL4Mr4MWMxc8FxropX a2azNjA+5+hi5OSQEDCRaD5xlw3CFpO4cG89kM3FISSwiFFi87OLzCAJIYEOJokFeyS6GDk4 2AQ0JVbd8wAJiwjISzzpvQHWyyzgJjHv71YwW1jAT+LvkvOsIDaLgKrEpb0XweK8Ai4SKzqX MYGMkRBQkJgzyQYkzCngKvF56UF2iE0uEpfn/GCcwMi7gJFhFaNoakFyQXFSeq6hXnFibnFp Xrpecn7uJkZweDyT2sG4ssHiEKMAB6MSD++D6qchQqyJZcWVuYcYJTiYlUR4LzA8CxHiTUms rEotyo8vKs1JLT7EKM3BoiTOq2TfFiIkkJ5YkpqdmlqQWgSTZeLglGpgbIyY3p91YmPtHzer 9p6gBedyliqW9GomBGlPdpnHP+vj+VW2lfXSEf/bjK/7Kc/671Y6q1hUjHNt5oGK61PXWXfP fv1Fc+lTlbkyO4uiZv5f4JfZnH9drdKn3Lzwqmtbc3xQzkfvtkv296udDfS37lqhsD7/ZUTh y/rt30QtrylEBJ9lP3NaiaU4I9FQi7moOBEAcOenHgsCAAA= 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..2d23f9a 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 of means to indicate end-of-stream for coda is to set the + * bytesused == 0. However by default videobuf2 handles videobuf + * 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); }