From patchwork Wed Jan 27 14:47:57 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 8134701 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id D8ADF9F1C0 for ; Wed, 27 Jan 2016 14:48:26 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 79F492035B for ; Wed, 27 Jan 2016 14:48:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 091492037E for ; Wed, 27 Jan 2016 14:48:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933283AbcA0OsV (ORCPT ); Wed, 27 Jan 2016 09:48:21 -0500 Received: from nblzone-211-213.nblnetworks.fi ([83.145.211.213]:57432 "EHLO hillosipuli.retiisi.org.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933076AbcA0OsP (ORCPT ); Wed, 27 Jan 2016 09:48:15 -0500 Received: from lanttu.localdomain (unknown [192.168.15.166]) by hillosipuli.retiisi.org.uk (Postfix) with ESMTP id 74B55600B3; Wed, 27 Jan 2016 16:48:12 +0200 (EET) From: Sakari Ailus To: linux-media@vger.kernel.org Cc: Laurent Pinchart Subject: [PATCH v2 4/5] v4l: omap3isp: Use V4L2 graph PM operations Date: Wed, 27 Jan 2016 16:47:57 +0200 Message-Id: <1453906078-29087-5-git-send-email-sakari.ailus@iki.fi> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1453906078-29087-1-git-send-email-sakari.ailus@iki.fi> References: <1453906078-29087-1-git-send-email-sakari.ailus@iki.fi> 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 Power on devices represented by entities in the graph through the pipeline state using V4L2 graph PM operations instead of what was in the omap3isp driver. Signed-off-by: Sakari Ailus Cc: Laurent Pinchart --- drivers/media/platform/omap3isp/isp.c | 213 +---------------------------- drivers/media/platform/omap3isp/isp.h | 4 - drivers/media/platform/omap3isp/ispvideo.c | 13 +- drivers/media/platform/omap3isp/ispvideo.h | 1 - 4 files changed, 6 insertions(+), 225 deletions(-) diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform/omap3isp/isp.c index 67efa9e..8be579c 100644 --- a/drivers/media/platform/omap3isp/isp.c +++ b/drivers/media/platform/omap3isp/isp.c @@ -64,6 +64,7 @@ #include #include +#include #include #include "isp.h" @@ -657,216 +658,6 @@ static irqreturn_t isp_isr(int irq, void *_isp) } /* ----------------------------------------------------------------------------- - * Pipeline power management - * - * Entities must be powered up when part of a pipeline that contains at least - * one open video device node. - * - * To achieve this use the entity use_count field to track the number of users. - * For entities corresponding to video device nodes the use_count field stores - * the users count of the node. For entities corresponding to subdevs the - * use_count field stores the total number of users of all video device nodes - * in the pipeline. - * - * The omap3isp_pipeline_pm_use() function must be called in the open() and - * close() handlers of video device nodes. It increments or decrements the use - * count of all subdev entities in the pipeline. - * - * To react to link management on powered pipelines, the link setup notification - * callback updates the use count of all entities in the source and sink sides - * of the link. - */ - -/* - * isp_pipeline_pm_use_count - Count the number of users of a pipeline - * @entity: The entity - * - * Return the total number of users of all video device nodes in the pipeline. - */ -static int isp_pipeline_pm_use_count(struct media_entity *entity, - struct media_entity_graph *graph) -{ - int use = 0; - - media_entity_graph_walk_start(graph, entity); - - while ((entity = media_entity_graph_walk_next(graph))) { - if (is_media_entity_v4l2_io(entity)) - use += entity->use_count; - } - - return use; -} - -/* - * isp_pipeline_pm_power_one - Apply power change to an entity - * @entity: The entity - * @change: Use count change - * - * Change the entity use count by @change. If the entity is a subdev update its - * power state by calling the core::s_power operation when the use count goes - * from 0 to != 0 or from != 0 to 0. - * - * Return 0 on success or a negative error code on failure. - */ -static int isp_pipeline_pm_power_one(struct media_entity *entity, int change) -{ - struct v4l2_subdev *subdev; - int ret; - - subdev = is_media_entity_v4l2_subdev(entity) - ? media_entity_to_v4l2_subdev(entity) : NULL; - - if (entity->use_count == 0 && change > 0 && subdev != NULL) { - ret = v4l2_subdev_call(subdev, core, s_power, 1); - if (ret < 0 && ret != -ENOIOCTLCMD) - return ret; - } - - entity->use_count += change; - WARN_ON(entity->use_count < 0); - - if (entity->use_count == 0 && change < 0 && subdev != NULL) - v4l2_subdev_call(subdev, core, s_power, 0); - - return 0; -} - -/* - * isp_pipeline_pm_power - Apply power change to all entities in a pipeline - * @entity: The entity - * @change: Use count change - * - * Walk the pipeline to update the use count and the power state of all non-node - * entities. - * - * Return 0 on success or a negative error code on failure. - */ -static int isp_pipeline_pm_power(struct media_entity *entity, int change, - struct media_entity_graph *graph) -{ - struct media_entity *first = entity; - int ret = 0; - - if (!change) - return 0; - - media_entity_graph_walk_start(graph, entity); - - while (!ret && (entity = media_entity_graph_walk_next(graph))) - if (is_media_entity_v4l2_subdev(entity)) - ret = isp_pipeline_pm_power_one(entity, change); - - if (!ret) - return ret; - - media_entity_graph_walk_start(graph, first); - - while ((first = media_entity_graph_walk_next(graph)) - && first != entity) - if (is_media_entity_v4l2_subdev(first)) - isp_pipeline_pm_power_one(first, -change); - - return ret; -} - -/* - * omap3isp_pipeline_pm_use - Update the use count of an entity - * @entity: The entity - * @use: Use (1) or stop using (0) the entity - * - * Update the use count of all entities in the pipeline and power entities on or - * off accordingly. - * - * Return 0 on success or a negative error code on failure. Powering entities - * off is assumed to never fail. No failure can occur when the use parameter is - * set to 0. - */ -int omap3isp_pipeline_pm_use(struct media_entity *entity, int use, - struct media_entity_graph *graph) -{ - int change = use ? 1 : -1; - int ret; - - mutex_lock(&entity->graph_obj.mdev->graph_mutex); - - /* Apply use count to node. */ - entity->use_count += change; - WARN_ON(entity->use_count < 0); - - /* Apply power change to connected non-nodes. */ - ret = isp_pipeline_pm_power(entity, change, graph); - if (ret < 0) - entity->use_count -= change; - - mutex_unlock(&entity->graph_obj.mdev->graph_mutex); - - return ret; -} - -/* - * isp_pipeline_link_notify - Link management notification callback - * @link: The link - * @flags: New link flags that will be applied - * @notification: The link's state change notification type (MEDIA_DEV_NOTIFY_*) - * - * React to link management on powered pipelines by updating the use count of - * all entities in the source and sink sides of the link. Entities are powered - * on or off accordingly. - * - * Return 0 on success or a negative error code on failure. Powering entities - * off is assumed to never fail. This function will not fail for disconnection - * events. - */ -static int isp_pipeline_link_notify(struct media_link *link, u32 flags, - unsigned int notification) -{ - struct media_entity_graph *graph = - &container_of(link->graph_obj.mdev, struct isp_device, - media_dev)->pm_count_graph; - struct media_entity *source = link->source->entity; - struct media_entity *sink = link->sink->entity; - int source_use; - int sink_use; - int ret = 0; - - if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) { - ret = media_entity_graph_walk_init(graph, - link->graph_obj.mdev); - if (ret) - return ret; - } - - source_use = isp_pipeline_pm_use_count(source, graph); - sink_use = isp_pipeline_pm_use_count(sink, graph); - - if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH && - !(flags & MEDIA_LNK_FL_ENABLED)) { - /* Powering off entities is assumed to never fail. */ - isp_pipeline_pm_power(source, -sink_use, graph); - isp_pipeline_pm_power(sink, -source_use, graph); - return 0; - } - - if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH && - (flags & MEDIA_LNK_FL_ENABLED)) { - - ret = isp_pipeline_pm_power(source, sink_use, graph); - if (ret < 0) - return ret; - - ret = isp_pipeline_pm_power(sink, source_use, graph); - if (ret < 0) - isp_pipeline_pm_power(source, -sink_use, graph); - } - - if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH) - media_entity_graph_walk_cleanup(graph); - - return ret; -} - -/* ----------------------------------------------------------------------------- * Pipeline stream management */ @@ -1889,7 +1680,7 @@ static int isp_register_entities(struct isp_device *isp) strlcpy(isp->media_dev.model, "TI OMAP3 ISP", sizeof(isp->media_dev.model)); isp->media_dev.hw_revision = isp->revision; - isp->media_dev.link_notify = isp_pipeline_link_notify; + isp->media_dev.link_notify = v4l2_pipeline_link_notify; media_device_init(&isp->media_dev); isp->v4l2_dev.mdev = &isp->media_dev; diff --git a/drivers/media/platform/omap3isp/isp.h b/drivers/media/platform/omap3isp/isp.h index 49b7f71..7e6f663 100644 --- a/drivers/media/platform/omap3isp/isp.h +++ b/drivers/media/platform/omap3isp/isp.h @@ -177,7 +177,6 @@ struct isp_device { struct v4l2_device v4l2_dev; struct v4l2_async_notifier notifier; struct media_device media_dev; - struct media_entity_graph pm_count_graph; struct device *dev; u32 revision; @@ -267,9 +266,6 @@ void omap3isp_subclk_enable(struct isp_device *isp, void omap3isp_subclk_disable(struct isp_device *isp, enum isp_subclk_resource res); -int omap3isp_pipeline_pm_use(struct media_entity *entity, int use, - struct media_entity_graph *graph); - int omap3isp_register_entities(struct platform_device *pdev, struct v4l2_device *v4l2_dev); void omap3isp_unregister_entities(struct platform_device *pdev); diff --git a/drivers/media/platform/omap3isp/ispvideo.c b/drivers/media/platform/omap3isp/ispvideo.c index 2aff755..ac76d29 100644 --- a/drivers/media/platform/omap3isp/ispvideo.c +++ b/drivers/media/platform/omap3isp/ispvideo.c @@ -22,8 +22,10 @@ #include #include #include + #include #include +#include #include #include "ispvideo.h" @@ -1292,12 +1294,7 @@ static int isp_video_open(struct file *file) goto done; } - ret = media_entity_graph_walk_init(&handle->graph, - &video->isp->media_dev); - if (ret) - goto done; - - ret = omap3isp_pipeline_pm_use(&video->video.entity, 1, &handle->graph); + ret = v4l2_pipeline_pm_use(&video->video.entity, 1); if (ret < 0) { omap3isp_put(video->isp); goto done; @@ -1328,7 +1325,6 @@ static int isp_video_open(struct file *file) done: if (ret < 0) { v4l2_fh_del(&handle->vfh); - media_entity_graph_walk_cleanup(&handle->graph); kfree(handle); } @@ -1348,8 +1344,7 @@ static int isp_video_release(struct file *file) vb2_queue_release(&handle->queue); mutex_unlock(&video->queue_lock); - omap3isp_pipeline_pm_use(&video->video.entity, 0, &handle->graph); - media_entity_graph_walk_cleanup(&handle->graph); + v4l2_pipeline_pm_use(&video->video.entity, 0); /* Release the file handle. */ v4l2_fh_del(vfh); diff --git a/drivers/media/platform/omap3isp/ispvideo.h b/drivers/media/platform/omap3isp/ispvideo.h index 1564298..6a48d58 100644 --- a/drivers/media/platform/omap3isp/ispvideo.h +++ b/drivers/media/platform/omap3isp/ispvideo.h @@ -189,7 +189,6 @@ struct isp_video_fh { struct vb2_queue queue; struct v4l2_format format; struct v4l2_fract timeperframe; - struct media_entity_graph graph; }; #define to_isp_video_fh(fh) container_of(fh, struct isp_video_fh, vfh)