From patchwork Tue Mar 12 12:12:42 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacopo Mondi X-Patchwork-Id: 729 Return-Path: Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id 01CC7611A8 for ; Tue, 12 Mar 2019 13:12:28 +0100 (CET) X-Originating-IP: 2.224.242.101 Received: from uno.lan (2-224-242-101.ip172.fastwebnet.it [2.224.242.101]) (Authenticated sender: jacopo@jmondi.org) by relay5-d.mail.gandi.net (Postfix) with ESMTPSA id 88C291C0002; Tue, 12 Mar 2019 12:12:27 +0000 (UTC) From: Jacopo Mondi To: libcamera-devel@lists.libcamera.org Date: Tue, 12 Mar 2019 13:12:42 +0100 Message-Id: <20190312121242.2253-15-jacopo@jmondi.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190312121242.2253-1-jacopo@jmondi.org> References: <20190312121242.2253-1-jacopo@jmondi.org> MIME-Version: 1.0 Subject: [libcamera-devel] [PATCH v2 14/14] RFC: libcamera: ipu3: Enable ImgU media links X-BeenThere: libcamera-devel@lists.libcamera.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Mar 2019 12:12:28 -0000 As the lenghty comment reports, link enable/disable is not trivial, as links in one ImgU instance interfere with capture operations in the other one. As I struggle to find where to disable links selectively, as of now reset the media graph and only enable the required links at streamConfiguration time. Signed-off-by: Jacopo Mondi --- src/libcamera/pipeline/ipu3/ipu3.cpp | 107 +++++++++++++++++++++++++++ 1 file changed, 107 insertions(+) diff --git a/src/libcamera/pipeline/ipu3/ipu3.cpp b/src/libcamera/pipeline/ipu3/ipu3.cpp index a113fd6ee74b..1c0d63f912d5 100644 --- a/src/libcamera/pipeline/ipu3/ipu3.cpp +++ b/src/libcamera/pipeline/ipu3/ipu3.cpp @@ -51,6 +51,10 @@ public: } void init(MediaDevice *media, unsigned int index); + int linkSetup(const std::string &source, unsigned int sourcePad, + const std::string &sink, unsigned int sinkPad, + bool enable); + int enableLinks(bool enable); unsigned int index_; std::string imguName_; @@ -270,6 +274,35 @@ int PipelineHandlerIPU3::configureStreams(Camera *camera, return -EINVAL; } + /* + * FIXME: enabled links in one ImgU instance interfere with capture + * operations on the other one. This can be easily triggered by + * capturing from one camera, then trying to capture from the other + * one right after without disabling media links in the media graph. + * + * The tricky part here is where to disable links on the ImgU instance + * which is not in use: + * 1) Link enable/disable cannot be done at start/stop time as video + * devices needs to be linked first before format can be configured on + * them. + * 2) As link enable has to be done here, before configuring formats, + * the only place where to disable links would be 'stop()', but the + * camera state machine allows start()<->stop() sequences without any + * streamConfiguration() in between. + * + * As of now, disable all links in the media graph before enabling + * the requested ones only. + */ + data->imgu->mediaDevice_->disableLinks(); + + /* + * \todo: Enable links selectively based on the requested streams. + * As of now, enable all links unconditionally. + */ + ret = data->imgu->enableLinks(true); + if (ret) + return ret; + /* * Pass the requested output image size to the sensor and get back the * adjusted one to be propagated to the CIO2 device and to the ImgU @@ -631,6 +664,80 @@ void ImgUDevice::init(MediaDevice *mediaDevice, unsigned int index) mediaDevice_ = mediaDevice; } +/** + * \brief Enable or disable a single link on the ImgU instance + * + * This method assumes the media device associated with the ImgU instance + * is open. + * + * \return 0 on success or a negative error code otherwise + */ +int ImgUDevice::linkSetup(const std::string &source, unsigned int sourcePad, + const std::string &sink, unsigned int sinkPad, + bool enable) +{ + MediaLink *link = mediaDevice_->link(source, sourcePad, sink, sinkPad); + if (!link) { + LOG(IPU3, Error) + << "Failed to get link: '" << source << "':" + << sourcePad << " -> '" << sink << "':" << sinkPad; + return -ENODEV; + } + + return link->setEnabled(enable); +} + +/** + * \brief Enable or disable all media links in the ImgU instance to prepare + * for capture operations + * + * \todo This method will probably be removed or changed once links will be + * enabled or disabled selectively. + * + * \return 0 on success or a negative error code otherwise + */ +int ImgUDevice::enableLinks(bool enable) +{ + std::string inputName = imguName_ + " input"; + std::string outputName = imguName_ + " output"; + std::string viewfinderName = imguName_ + " viewfinder"; + std::string statName = imguName_ + " 3a stat"; + int ret; + + /* \todo Establish rules to handle media devices open/close. */ + ret = mediaDevice_->open(); + if (ret) + return ret; + + ret = linkSetup(inputName, 0, imguName_, PAD_INPUT, enable); + if (ret) { + mediaDevice_->close(); + return ret; + } + + ret = linkSetup(imguName_, PAD_OUTPUT, outputName, 0, enable); + if (ret) { + mediaDevice_->close(); + return ret; + } + + ret = linkSetup(imguName_, PAD_VF, viewfinderName, 0, enable); + if (ret) { + mediaDevice_->close(); + return ret; + } + + ret = linkSetup(imguName_, PAD_STAT, statName, 0, enable); + if (ret) { + mediaDevice_->close(); + return ret; + } + + mediaDevice_->close(); + + return 0; +} + int PipelineHandlerIPU3::mediaBusToCIO2Format(unsigned int code) { switch(code) {