From patchwork Mon Jan 18 16:10:26 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacek Anaszewski X-Patchwork-Id: 8055911 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 E4D6DBEEE5 for ; Mon, 18 Jan 2016 16:10:51 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 01F93203F1 for ; Mon, 18 Jan 2016 16:10:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B876B204AE for ; Mon, 18 Jan 2016 16:10:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755570AbcARQKq (ORCPT ); Mon, 18 Jan 2016 11:10:46 -0500 Received: from mailout3.samsung.com ([203.254.224.33]:56478 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755455AbcARQKp (ORCPT ); Mon, 18 Jan 2016 11:10:45 -0500 Received: from epcpsbgm2new.samsung.com (epcpsbgm2 [203.254.230.27]) by mailout3.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTP id <0O1500VVDOXSN310@mailout3.samsung.com> for linux-media@vger.kernel.org; Tue, 19 Jan 2016 01:10:44 +0900 (KST) X-AuditID: cbfee61b-f793c6d00000236c-5b-569d0e847727 Received: from epmmp2 ( [203.254.227.17]) by epcpsbgm2new.samsung.com (EPCPMTA) with SMTP id A1.39.09068.48E0D965; Tue, 19 Jan 2016 01:10:44 +0900 (KST) Received: from AMDC2362.DIGITAL.local ([106.120.53.23]) by mmp2.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTPA id <0O15002PEOXHRQ00@mmp2.samsung.com>; Tue, 19 Jan 2016 01:10:44 +0900 (KST) From: Jacek Anaszewski To: linux-media@vger.kernel.org Cc: Jacek Anaszewski , Sylwester Nawrocki Subject: [PATCH 2/3] exynos4-is: Open shouldn't fail when sensor entity is not linked Date: Mon, 18 Jan 2016 17:10:26 +0100 Message-id: <1453133427-20793-3-git-send-email-j.anaszewski@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1453133427-20793-1-git-send-email-j.anaszewski@samsung.com> References: <1453133427-20793-1-git-send-email-j.anaszewski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrEJMWRmVeSWpSXmKPExsVy+t9jQd0WvrlhBtt7ZS16rz5ntOjZsJXV 4vCbdlYHZo++LasYPT5vkgtgiuKySUnNySxLLdK3S+DKaDt5k71gj2rF3qkf2BsYX8h2MXJy SAiYSBxr+c4OYYtJXLi3ng3EFhKYxSgxcZF8FyMXkP2TUeJt+35WkASbgKHEzxevmUBsEQF5 iSe9N8AamAXiJB6cPcEMYgsLhEvcObkPLM4ioCox6eNuMJtXwENi0fdjQL0cQMsUJOZMsgEJ cwp4SnS8P8AEsddDYvnsDuYJjLwLGBlWMUqkFiQXFCel5xrlpZbrFSfmFpfmpesl5+duYgSH xDPpHYyHd7kfYhTgYFTi4XU4OztMiDWxrLgy9xCjBAezkgjvIY65YUK8KYmVValF+fFFpTmp xYcYpTlYlMR5912KDBMSSE8sSc1OTS1ILYLJMnFwSjUwKnCsetiWcOzgjLxz7RtMJpqY/288 KTXz299ic4WChJMPZzBOvlhQucHb1DyqupcxxDf6/c15Pau7G6MOrnU/ciIh/gmfOFec6Ouu Eq6VMmJLHZtjHX8m/lu1ee0fk0wOI19nh78XrjWK78wJPSXbnGBRqLf9wLn24zt6//38P8vs 0vvC2ULvlFiKMxINtZiLihMBb1hnZwUCAAA= 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, 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 In order to allow for automatic media device entities linking from the level of libv4l plugin the open system call shouldn't fail, as the libv4l plugins can begin their job not until it succeeds. This patch allows for leaving the pipeline not linked on open and postpones verifying it to the moment when streamon callback is called. Signed-off-by: Jacek Anaszewski Acked-by: Kyungmin Park Cc: Sylwester Nawrocki --- drivers/media/platform/exynos4-is/media-dev.c | 95 ++++++++++++++++++++----- 1 file changed, 76 insertions(+), 19 deletions(-) diff --git a/drivers/media/platform/exynos4-is/media-dev.c b/drivers/media/platform/exynos4-is/media-dev.c index 4f5586a..f4d822c 100644 --- a/drivers/media/platform/exynos4-is/media-dev.c +++ b/drivers/media/platform/exynos4-is/media-dev.c @@ -187,6 +187,37 @@ error: } /** + * __fimc_pipeline_enable - enable power of all pipeline subdevs + * and the sensor clock + * @ep: video pipeline structure + * @fmd: fimc media device + * + * Called with the graph mutex held. + */ +static int __fimc_pipeline_enable(struct exynos_media_pipeline *ep, + struct fimc_md *fmd) +{ + struct fimc_pipeline *p = to_fimc_pipeline(ep); + int ret; + + /* Enable PXLASYNC clock if this pipeline includes FIMC-IS */ + if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) { + ret = clk_prepare_enable(fmd->wbclk[CLK_IDX_WB_B]); + if (ret < 0) + return ret; + } + + ret = fimc_pipeline_s_power(p, 1); + if (!ret) + return 0; + + if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) + clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]); + + return ret; +} + +/** * __fimc_pipeline_open - update the pipeline information, enable power * of all pipeline subdevs and the sensor clock * @me: media entity to start graph walk with @@ -200,7 +231,6 @@ static int __fimc_pipeline_open(struct exynos_media_pipeline *ep, struct fimc_md *fmd = entity_to_fimc_mdev(me); struct fimc_pipeline *p = to_fimc_pipeline(ep); struct v4l2_subdev *sd; - int ret; if (WARN_ON(p == NULL || me == NULL)) return -EINVAL; @@ -209,24 +239,16 @@ static int __fimc_pipeline_open(struct exynos_media_pipeline *ep, fimc_pipeline_prepare(p, me); sd = p->subdevs[IDX_SENSOR]; - if (sd == NULL) - return -EINVAL; - - /* Disable PXLASYNC clock if this pipeline includes FIMC-IS */ - if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) { - ret = clk_prepare_enable(fmd->wbclk[CLK_IDX_WB_B]); - if (ret < 0) - return ret; - } - - ret = fimc_pipeline_s_power(p, 1); - if (!ret) + if (sd == NULL) { + pr_warn("%s(): No sensor subdev\n", __func__); + /* + * Pipeline open cannot fail so as to make it possible + * for the user space to configure the pipeline. + */ return 0; + } - if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) - clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]); - - return ret; + return __fimc_pipeline_enable(ep, fmd); } /** @@ -270,10 +292,43 @@ static int __fimc_pipeline_s_stream(struct exynos_media_pipeline *ep, bool on) { IDX_CSIS, IDX_FLITE, IDX_FIMC, IDX_SENSOR, IDX_IS_ISP }, }; struct fimc_pipeline *p = to_fimc_pipeline(ep); + struct fimc_md *fmd = entity_to_fimc_mdev(&p->subdevs[IDX_CSIS]->entity); + enum fimc_subdev_index sd_id; int i, ret = 0; - if (p->subdevs[IDX_SENSOR] == NULL) - return -ENODEV; + if (p->subdevs[IDX_SENSOR] == NULL) { + if (!fmd->user_subdev_api) { + /* + * Sensor must be already discovered if we + * aren't in the user_subdev_api mode + */ + return -ENODEV; + } + + /* Get pipeline sink entity */ + if (p->subdevs[IDX_FIMC]) + sd_id = IDX_FIMC; + else if (p->subdevs[IDX_IS_ISP]) + sd_id = IDX_IS_ISP; + else if (p->subdevs[IDX_FLITE]) + sd_id = IDX_FLITE; + else + return -ENODEV; + + /* + * Sensor could have been linked between open and STREAMON - + * check if this is the case. + */ + fimc_pipeline_prepare(p, &p->subdevs[sd_id]->entity); + + if (p->subdevs[IDX_SENSOR] == NULL) + return -ENODEV; + + ret = __fimc_pipeline_enable(ep, fmd); + if (ret < 0) + return ret; + + } for (i = 0; i < IDX_MAX; i++) { unsigned int idx = seq[on][i]; @@ -283,8 +338,10 @@ static int __fimc_pipeline_s_stream(struct exynos_media_pipeline *ep, bool on) if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) goto error; } + return 0; error: + fimc_pipeline_s_power(p, !on); for (; i >= 0; i--) { unsigned int idx = seq[on][i]; v4l2_subdev_call(p->subdevs[idx], video, s_stream, !on);