From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 99588C43381 for ; Mon, 1 Apr 2019 09:31:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 654F020830 for ; Mon, 1 Apr 2019 09:31:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726532AbfDAJbp (ORCPT ); Mon, 1 Apr 2019 05:31:45 -0400 Received: from mx07-00178001.pphosted.com ([62.209.51.94]:2058 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725817AbfDAJbo (ORCPT ); Mon, 1 Apr 2019 05:31:44 -0400 Received: from pps.filterd (m0046668.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x319LbLT004022; Mon, 1 Apr 2019 11:31:26 +0200 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 2rhxt4hsbb-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Mon, 01 Apr 2019 11:31:26 +0200 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 005A134; Mon, 1 Apr 2019 09:31:25 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas24.st.com [10.75.90.94]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id CC7992438; Mon, 1 Apr 2019 09:31:25 +0000 (GMT) Received: from SAFEX1HUBCAS23.st.com (10.75.90.47) by Safex1hubcas24.st.com (10.75.90.94) with Microsoft SMTP Server (TLS) id 14.3.435.0; Mon, 1 Apr 2019 11:31:25 +0200 Received: from localhost (10.201.23.19) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.435.0; Mon, 1 Apr 2019 11:31:25 +0200 From: Hugues Fruchet To: Alexandre Torgue , Mauro Carvalho Chehab , Hans Verkuil CC: , , , , Benjamin Gaignard , Yannick Fertre , Philippe CORNU , "Hugues Fruchet" , Mickael GUENE Subject: [PATCH 2/2] media: stm32-dcmi: add support of several sub-devices Date: Mon, 1 Apr 2019 11:31:15 +0200 Message-ID: <1554111076-31471-3-git-send-email-hugues.fruchet@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1554111076-31471-1-git-send-email-hugues.fruchet@st.com> References: <1554111076-31471-1-git-send-email-hugues.fruchet@st.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.201.23.19] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-04-01_04:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add support of several sub-devices within pipeline. This allows support of a CSI-2 camera sensor connected through a CSI-2 to parallel bridge. Signed-off-by: Hugues Fruchet --- drivers/media/platform/stm32/stm32-dcmi.c | 129 ++++++++++++++++++++++++++---- 1 file changed, 113 insertions(+), 16 deletions(-) diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c index 488858e..f441721 100644 --- a/drivers/media/platform/stm32/stm32-dcmi.c +++ b/drivers/media/platform/stm32/stm32-dcmi.c @@ -175,6 +175,7 @@ struct stm32_dcmi { struct media_device mdev; struct media_pad vid_cap_pad; + struct media_pipeline pipeline; }; static inline struct stm32_dcmi *notifier_to_dcmi(struct v4l2_async_notifier *n) @@ -586,6 +587,51 @@ static void dcmi_buf_queue(struct vb2_buffer *vb) spin_unlock_irq(&dcmi->irqlock); } +static int dcmi_pipeline_start_stop(struct stm32_dcmi *dcmi, bool start) +{ + struct media_entity *entity = &dcmi->vdev->entity; + struct v4l2_subdev *subdev; + struct media_pad *pad; + int ret; + + /* Start/stop all entities within pipeline */ + while (1) { + pad = &entity->pads[0]; + if (!(pad->flags & MEDIA_PAD_FL_SINK)) + break; + + pad = media_entity_remote_pad(pad); + if (!pad || !is_media_entity_v4l2_subdev(pad->entity)) + break; + + entity = pad->entity; + subdev = media_entity_to_v4l2_subdev(entity); + + ret = v4l2_subdev_call(subdev, video, s_stream, start); + if (ret < 0 && ret != -ENOIOCTLCMD) { + dev_err(dcmi->dev, "%s: Subdev %s failed to %s streaming (%d)\n", + __func__, subdev->name, + start ? "start" : "stop", ret); + return ret; + } + + dev_dbg(dcmi->dev, "Subdev %s %s\n", + subdev->name, start ? "started" : "stopped"); + } + + return 0; +} + +static int dcmi_pipeline_start(struct stm32_dcmi *dcmi) +{ + return dcmi_pipeline_start_stop(dcmi, true); +} + +static void dcmi_pipeline_stop(struct stm32_dcmi *dcmi) +{ + dcmi_pipeline_start_stop(dcmi, false); +} + static int dcmi_start_streaming(struct vb2_queue *vq, unsigned int count) { struct stm32_dcmi *dcmi = vb2_get_drv_priv(vq); @@ -600,14 +646,17 @@ static int dcmi_start_streaming(struct vb2_queue *vq, unsigned int count) goto err_release_buffers; } - /* Enable stream on the sub device */ - ret = v4l2_subdev_call(dcmi->entity.subdev, video, s_stream, 1); - if (ret && ret != -ENOIOCTLCMD) { - dev_err(dcmi->dev, "%s: Failed to start streaming, subdev streamon error", - __func__); + ret = media_pipeline_start(&dcmi->vdev->entity, &dcmi->pipeline); + if (ret < 0) { + dev_err(dcmi->dev, "%s: Failed to start streaming, media pipeline start error (%d)\n", + __func__, ret); goto err_pm_put; } + ret = dcmi_pipeline_start(dcmi); + if (ret) + goto err_media_pipeline_stop; + spin_lock_irq(&dcmi->irqlock); /* Set bus width */ @@ -702,7 +751,7 @@ static int dcmi_start_streaming(struct vb2_queue *vq, unsigned int count) if (ret) { dev_err(dcmi->dev, "%s: Start streaming failed, cannot start capture\n", __func__); - goto err_subdev_streamoff; + goto err_pipeline_stop; } /* Enable interruptions */ @@ -713,8 +762,11 @@ static int dcmi_start_streaming(struct vb2_queue *vq, unsigned int count) return 0; -err_subdev_streamoff: - v4l2_subdev_call(dcmi->entity.subdev, video, s_stream, 0); +err_pipeline_stop: + dcmi_pipeline_stop(dcmi); + +err_media_pipeline_stop: + media_pipeline_stop(&dcmi->vdev->entity); err_pm_put: pm_runtime_put(dcmi->dev); @@ -739,13 +791,10 @@ static void dcmi_stop_streaming(struct vb2_queue *vq) { struct stm32_dcmi *dcmi = vb2_get_drv_priv(vq); struct dcmi_buf *buf, *node; - int ret; - /* Disable stream on the sub device */ - ret = v4l2_subdev_call(dcmi->entity.subdev, video, s_stream, 0); - if (ret && ret != -ENOIOCTLCMD) - dev_err(dcmi->dev, "%s: Failed to stop streaming, subdev streamoff error (%d)\n", - __func__, ret); + dcmi_pipeline_stop(dcmi); + + media_pipeline_stop(&dcmi->vdev->entity); spin_lock_irq(&dcmi->irqlock); @@ -1554,8 +1603,25 @@ static int dcmi_graph_notify_complete(struct v4l2_async_notifier *notifier) { struct stm32_dcmi *dcmi = notifier_to_dcmi(notifier); int ret; + struct media_entity *entity; + + /* + * Now that the graph is complete, + * we search for the camera sensor subdevice + * in order to expose it through V4L2 interface + */ + media_device_for_each_entity(entity, &dcmi->mdev) + if (entity->function == MEDIA_ENT_F_CAM_SENSOR) + dcmi->entity.subdev = + media_entity_to_v4l2_subdev(entity); + + if (!dcmi->entity.subdev) { + dev_err(dcmi->dev, "No camera sensor subdevice found\n"); + return -ENODEV; + } dcmi->vdev->ctrl_handler = dcmi->entity.subdev->ctrl_handler; + ret = dcmi_formats_init(dcmi); if (ret) { dev_err(dcmi->dev, "No supported mediabus format found\n"); @@ -1599,12 +1665,34 @@ static int dcmi_graph_notify_bound(struct v4l2_async_notifier *notifier, struct v4l2_async_subdev *asd) { struct stm32_dcmi *dcmi = notifier_to_dcmi(notifier); + unsigned int ret; + int source_pad; dev_dbg(dcmi->dev, "Subdev %s bound\n", subdev->name); - dcmi->entity.subdev = subdev; + if (subdev->entity.function != MEDIA_ENT_F_CAM_SENSOR && + subdev->entity.function != MEDIA_ENT_F_VID_IF_BRIDGE) + return 0; - return 0; + /* + * Link this subdevice to DCMI, it could be a + * parallel camera sensor directly or a bridge + */ + source_pad = media_entity_get_fwnode_pad(&subdev->entity, + subdev->fwnode, + MEDIA_PAD_FL_SOURCE); + + ret = media_create_pad_link(&subdev->entity, source_pad, + &dcmi->vdev->entity, 0, + MEDIA_LNK_FL_IMMUTABLE | + MEDIA_LNK_FL_ENABLED); + if (ret) + dev_err(dcmi->dev, "Failed to create media pad link with subdev %s\n", + subdev->name); + else + dev_dbg(dcmi->dev, "DCMI is now linked to %s\n", subdev->name); + + return ret; } static const struct v4l2_async_notifier_operations dcmi_graph_notify_ops = { @@ -1664,6 +1752,15 @@ static int dcmi_graph_init(struct stm32_dcmi *dcmi) return ret; } + /* Register all the subdev nodes */ + ret = v4l2_device_register_subdev_nodes(&dcmi->v4l2_dev); + if (ret) { + dev_err(dcmi->dev, "Failed to register subdev nodes\n"); + v4l2_async_notifier_unregister(&dcmi->notifier); + of_node_put(dcmi->entity.node); + return ret; + } + return 0; } -- 2.7.4