From patchwork Fri Mar 13 01:46:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Helen Koike X-Patchwork-Id: 11435795 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 1C8D492C for ; Fri, 13 Mar 2020 01:46:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 051A9206EB for ; Fri, 13 Mar 2020 01:46:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726526AbgCMBqt (ORCPT ); Thu, 12 Mar 2020 21:46:49 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:48528 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726423AbgCMBqs (ORCPT ); Thu, 12 Mar 2020 21:46:48 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: koike) with ESMTPSA id D3028296FBE From: Helen Koike To: linux-media@vger.kernel.org Cc: mchehab@kernel.org, linux-kernel@vger.kernel.org, tfiga@chromium.org, linux-rockchip@lists.infradead.org, hans.verkuil@cisco.com, kernel@collabora.com, Helen Koike Subject: [PATCH 2/3] media: staging: rkisp1: do not call s_stream if the entity is still in use Date: Thu, 12 Mar 2020 22:46:25 -0300 Message-Id: <20200313014626.3103091-3-helen.koike@collabora.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200313014626.3103091-1-helen.koike@collabora.com> References: <20200313014626.3103091-1-helen.koike@collabora.com> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org If stream is being used by another stream, then .s_stream callback shouldn't be called. This fixes the following behaviour: When performing smultaneos stream from both capture devices, stopping one streaming would make the other to stall, since it disables all the shared entities from both pipelines. Signed-off-by: Helen Koike --- Hi, I'm not sure if it is ok to check for entity->pipe, since I didn't see other drivers doing this. Please let me know if you have any other suggestion to verity if the entity is marked as streaming. Thanks --- drivers/staging/media/rkisp1/rkisp1-capture.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/staging/media/rkisp1/rkisp1-capture.c b/drivers/staging/media/rkisp1/rkisp1-capture.c index 97091e5a6e6c..e665381b5af0 100644 --- a/drivers/staging/media/rkisp1/rkisp1-capture.c +++ b/drivers/staging/media/rkisp1/rkisp1-capture.c @@ -892,6 +892,10 @@ static int rkisp1_pipeline_disable_cb(struct media_entity *from, { struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(curr); + /* subdevice is already enabled */ + if (curr->pipe) + return 0; + return v4l2_subdev_call(sd, video, s_stream, false); } @@ -900,6 +904,10 @@ static int rkisp1_pipeline_enable_cb(struct media_entity *from, { struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(curr); + /* don't disable subdevice if it is still in use by another stream */ + if (curr->pipe) + return 0; + return v4l2_subdev_call(sd, video, s_stream, true); }