From patchwork Mon Jan 18 01:52:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ezequiel Garcia X-Patchwork-Id: 365799 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, UNPARSEABLE_RELAY, URIBL_BLOCKED, 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 D79F9C433E0 for ; Mon, 18 Jan 2021 01:54:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A0B6A223E8 for ; Mon, 18 Jan 2021 01:54:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730925AbhARByX (ORCPT ); Sun, 17 Jan 2021 20:54:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33098 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730878AbhARByV (ORCPT ); Sun, 17 Jan 2021 20:54:21 -0500 Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e3e3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2DE40C061575 for ; Sun, 17 Jan 2021 17:53:41 -0800 (PST) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: ezequiel) with ESMTPSA id F27B71F44A1E From: Ezequiel Garcia To: linux-media@vger.kernel.org, Hans Verkuil Cc: kernel@collabora.com, Laurent Pinchart , Sakari Ailus , Kieran Bingham , Jacopo Mondi , =?utf-8?q?Niklas_S=C3=B6derlund?= , Helen Koike , Dafna Hirschfeld , Hugues Fruchet , Nicolas Ferre , Yong Zhi , Sylwester Nawrocki , Maxime Ripard , Robert Foss , Philipp Zabel , Ezequiel Garcia , Jacopo Mondi Subject: [PATCH v2 03/14] media: stm32: Use v4l2_async_notifier_add_fwnode_remote_subdev Date: Sun, 17 Jan 2021 22:52:47 -0300 Message-Id: <20210118015258.3993-4-ezequiel@collabora.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210118015258.3993-1-ezequiel@collabora.com> References: <20210118015258.3993-1-ezequiel@collabora.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The use of v4l2_async_notifier_add_subdev will be discouraged. Drivers are instead encouraged to use a helper such as v4l2_async_notifier_add_fwnode_remote_subdev. This fixes a misuse of the API, as v4l2_async_notifier_add_subdev should get a kmalloc'ed struct v4l2_async_subdev, removing some boilerplate code while at it. Use the appropriate helper v4l2_async_notifier_add_fwnode_remote_subdev, which handles the needed setup, instead of open-coding it. This results in removal of the now unneeded driver-specific state struct dcmi_graph_entity, keeping track of just the source subdevice. Signed-off-by: Ezequiel Garcia Reviewed-by: Jacopo Mondi Reviewed-by: Helen Koike --- drivers/media/platform/stm32/stm32-dcmi.c | 86 ++++++++--------------- 1 file changed, 30 insertions(+), 56 deletions(-) diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c index b745f1342c2e..142f63d07dcd 100644 --- a/drivers/media/platform/stm32/stm32-dcmi.c +++ b/drivers/media/platform/stm32/stm32-dcmi.c @@ -99,13 +99,6 @@ enum state { #define OVERRUN_ERROR_THRESHOLD 3 -struct dcmi_graph_entity { - struct v4l2_async_subdev asd; - - struct device_node *remote_node; - struct v4l2_subdev *source; -}; - struct dcmi_format { u32 fourcc; u32 mbus_code; @@ -139,7 +132,7 @@ struct stm32_dcmi { struct v4l2_device v4l2_dev; struct video_device *vdev; struct v4l2_async_notifier notifier; - struct dcmi_graph_entity entity; + struct v4l2_subdev *source; struct v4l2_format fmt; struct v4l2_rect crop; bool do_crop; @@ -610,7 +603,7 @@ static int dcmi_pipeline_s_fmt(struct stm32_dcmi *dcmi, struct v4l2_subdev_pad_config *pad_cfg, struct v4l2_subdev_format *format) { - struct media_entity *entity = &dcmi->entity.source->entity; + struct media_entity *entity = &dcmi->source->entity; struct v4l2_subdev *subdev; struct media_pad *sink_pad = NULL; struct media_pad *src_pad = NULL; @@ -1018,7 +1011,7 @@ static int dcmi_try_fmt(struct stm32_dcmi *dcmi, struct v4l2_format *f, } v4l2_fill_mbus_format(&format.format, pix, sd_fmt->mbus_code); - ret = v4l2_subdev_call(dcmi->entity.source, pad, set_fmt, + ret = v4l2_subdev_call(dcmi->source, pad, set_fmt, &pad_cfg, &format); if (ret < 0) return ret; @@ -1152,7 +1145,7 @@ static int dcmi_get_sensor_format(struct stm32_dcmi *dcmi, }; int ret; - ret = v4l2_subdev_call(dcmi->entity.source, pad, get_fmt, NULL, &fmt); + ret = v4l2_subdev_call(dcmi->source, pad, get_fmt, NULL, &fmt); if (ret) return ret; @@ -1181,7 +1174,7 @@ static int dcmi_set_sensor_format(struct stm32_dcmi *dcmi, } v4l2_fill_mbus_format(&format.format, pix, sd_fmt->mbus_code); - ret = v4l2_subdev_call(dcmi->entity.source, pad, set_fmt, + ret = v4l2_subdev_call(dcmi->source, pad, set_fmt, &pad_cfg, &format); if (ret < 0) return ret; @@ -1204,7 +1197,7 @@ static int dcmi_get_sensor_bounds(struct stm32_dcmi *dcmi, /* * Get sensor bounds first */ - ret = v4l2_subdev_call(dcmi->entity.source, pad, get_selection, + ret = v4l2_subdev_call(dcmi->source, pad, get_selection, NULL, &bounds); if (!ret) *r = bounds.r; @@ -1385,7 +1378,7 @@ static int dcmi_enum_framesizes(struct file *file, void *fh, fse.code = sd_fmt->mbus_code; - ret = v4l2_subdev_call(dcmi->entity.source, pad, enum_frame_size, + ret = v4l2_subdev_call(dcmi->source, pad, enum_frame_size, NULL, &fse); if (ret) return ret; @@ -1402,7 +1395,7 @@ static int dcmi_g_parm(struct file *file, void *priv, { struct stm32_dcmi *dcmi = video_drvdata(file); - return v4l2_g_parm_cap(video_devdata(file), dcmi->entity.source, p); + return v4l2_g_parm_cap(video_devdata(file), dcmi->source, p); } static int dcmi_s_parm(struct file *file, void *priv, @@ -1410,7 +1403,7 @@ static int dcmi_s_parm(struct file *file, void *priv, { struct stm32_dcmi *dcmi = video_drvdata(file); - return v4l2_s_parm_cap(video_devdata(file), dcmi->entity.source, p); + return v4l2_s_parm_cap(video_devdata(file), dcmi->source, p); } static int dcmi_enum_frameintervals(struct file *file, void *fh, @@ -1432,7 +1425,7 @@ static int dcmi_enum_frameintervals(struct file *file, void *fh, fie.code = sd_fmt->mbus_code; - ret = v4l2_subdev_call(dcmi->entity.source, pad, + ret = v4l2_subdev_call(dcmi->source, pad, enum_frame_interval, NULL, &fie); if (ret) return ret; @@ -1452,7 +1445,7 @@ MODULE_DEVICE_TABLE(of, stm32_dcmi_of_match); static int dcmi_open(struct file *file) { struct stm32_dcmi *dcmi = video_drvdata(file); - struct v4l2_subdev *sd = dcmi->entity.source; + struct v4l2_subdev *sd = dcmi->source; int ret; if (mutex_lock_interruptible(&dcmi->lock)) @@ -1483,7 +1476,7 @@ static int dcmi_open(struct file *file) static int dcmi_release(struct file *file) { struct stm32_dcmi *dcmi = video_drvdata(file); - struct v4l2_subdev *sd = dcmi->entity.source; + struct v4l2_subdev *sd = dcmi->source; bool fh_singular; int ret; @@ -1616,7 +1609,7 @@ static int dcmi_formats_init(struct stm32_dcmi *dcmi) { const struct dcmi_format *sd_fmts[ARRAY_SIZE(dcmi_formats)]; unsigned int num_fmts = 0, i, j; - struct v4l2_subdev *subdev = dcmi->entity.source; + struct v4l2_subdev *subdev = dcmi->source; struct v4l2_subdev_mbus_code_enum mbus_code = { .which = V4L2_SUBDEV_FORMAT_ACTIVE, }; @@ -1675,7 +1668,7 @@ static int dcmi_formats_init(struct stm32_dcmi *dcmi) static int dcmi_framesizes_init(struct stm32_dcmi *dcmi) { unsigned int num_fsize = 0; - struct v4l2_subdev *subdev = dcmi->entity.source; + struct v4l2_subdev *subdev = dcmi->source; struct v4l2_subdev_frame_size_enum fse = { .which = V4L2_SUBDEV_FORMAT_ACTIVE, .code = dcmi->sd_format->mbus_code, @@ -1727,14 +1720,13 @@ static int dcmi_graph_notify_complete(struct v4l2_async_notifier *notifier) * we search for the source subdevice * in order to expose it through V4L2 interface */ - dcmi->entity.source = - media_entity_to_v4l2_subdev(dcmi_find_source(dcmi)); - if (!dcmi->entity.source) { + dcmi->source = media_entity_to_v4l2_subdev(dcmi_find_source(dcmi)); + if (!dcmi->source) { dev_err(dcmi->dev, "Source subdevice not found\n"); return -ENODEV; } - dcmi->vdev->ctrl_handler = dcmi->entity.source->ctrl_handler; + dcmi->vdev->ctrl_handler = dcmi->source->ctrl_handler; ret = dcmi_formats_init(dcmi); if (ret) { @@ -1813,46 +1805,28 @@ static const struct v4l2_async_notifier_operations dcmi_graph_notify_ops = { .complete = dcmi_graph_notify_complete, }; -static int dcmi_graph_parse(struct stm32_dcmi *dcmi, struct device_node *node) -{ - struct device_node *ep = NULL; - struct device_node *remote; - - ep = of_graph_get_next_endpoint(node, ep); - if (!ep) - return -EINVAL; - - remote = of_graph_get_remote_port_parent(ep); - of_node_put(ep); - if (!remote) - return -EINVAL; - - /* Remote node to connect */ - dcmi->entity.remote_node = remote; - dcmi->entity.asd.match_type = V4L2_ASYNC_MATCH_FWNODE; - dcmi->entity.asd.match.fwnode = of_fwnode_handle(remote); - return 0; -} - static int dcmi_graph_init(struct stm32_dcmi *dcmi) { + struct v4l2_async_subdev *asd; + struct device_node *ep; int ret; - /* Parse the graph to extract a list of subdevice DT nodes. */ - ret = dcmi_graph_parse(dcmi, dcmi->dev->of_node); - if (ret < 0) { - dev_err(dcmi->dev, "Failed to parse graph\n"); - return ret; + ep = of_graph_get_next_endpoint(dcmi->dev->of_node, NULL); + if (!ep) { + dev_err(dcmi->dev, "Failed to get next endpoint\n"); + return -EINVAL; } v4l2_async_notifier_init(&dcmi->notifier); - ret = v4l2_async_notifier_add_subdev(&dcmi->notifier, - &dcmi->entity.asd); - if (ret) { + asd = v4l2_async_notifier_add_fwnode_remote_subdev( + &dcmi->notifier, of_fwnode_handle(ep), sizeof(*asd)); + + of_node_put(ep); + + if (IS_ERR(asd)) { dev_err(dcmi->dev, "Failed to add subdev notifier\n"); - of_node_put(dcmi->entity.remote_node); - return ret; + return PTR_ERR(asd); } dcmi->notifier.ops = &dcmi_graph_notify_ops;