From patchwork Fri Apr 3 21:33:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Helen Koike X-Patchwork-Id: 11473681 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2131D92C for ; Fri, 3 Apr 2020 21:33:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 007212078C for ; Fri, 3 Apr 2020 21:33:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728308AbgDCVdg (ORCPT ); Fri, 3 Apr 2020 17:33:36 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:60616 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727829AbgDCVdg (ORCPT ); Fri, 3 Apr 2020 17:33:36 -0400 Received: from floko.floko.floko (unknown [IPv6:2804:431:e7cc:11ff:4f80:3de:e2b2:5c1d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: koike) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id 1CDED29612D; Fri, 3 Apr 2020 22:33:30 +0100 (BST) From: Helen Koike To: linux-media@vger.kernel.org Cc: kernel@collabora.com, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, hans.verkuil@cisco.com, skhan@linuxfoundation.org, niklas.soderlund@ragnatech.se, mchehab@kernel.org, Helen Koike Subject: [PATCH v2 1/3] media: v4l2-common: add helper functions to call s_stream() callbacks Date: Fri, 3 Apr 2020 18:33:10 -0300 Message-Id: <20200403213312.1863876-2-helen.koike@collabora.com> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200403213312.1863876-1-helen.koike@collabora.com> References: <20200403213312.1863876-1-helen.koike@collabora.com> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add v4l2_pipeline_stream_{enable,disable} helper functions to iterate through the subdevices in a given stream (i.e following links from sink to source) and call .s_stream() callback. Add stream_count on the subdevice object for simultaneous streaming from different video devices which shares subdevices. Prevent calling .s_stream(true) if it was already called previously by another stream. Prevent calling .s_stream(false) from one stream when there are still others active. If .s_stream(true) fails, call .s_stream(false) in the reverse order. Signed-off-by: Helen Koike Reported-by: kbuild test robot Reported-by: kbuild test robot --- Changes in v2: - re-write helpers to not use media walkers drivers/media/v4l2-core/v4l2-common.c | 117 ++++++++++++++++++++++++++ include/media/v4l2-common.h | 28 ++++++ include/media/v4l2-subdev.h | 2 + 3 files changed, 147 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c index d0e5ebc736f9f..379d4bf4f8128 100644 --- a/drivers/media/v4l2-core/v4l2-common.c +++ b/drivers/media/v4l2-core/v4l2-common.c @@ -441,3 +441,120 @@ int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, u32 pixelformat, return 0; } EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt); + +/* + * v4l2_pipeline_subdevs_get - Assemble a list of subdevices in a pipeline + * @subdevs: the array to be filled + * @size: the array size + * + * Walk from a video node, following link from sink to source and fill the + * array with subdevices in the path. + * + * Note: this function follows the first enabled link in a sink pad found in a + * given entity. Thus it won't work if there are entities with multiple enabled + * links to its sink pads in the topology. + * + * Return the number of subdevices filled in the array. + */ +static unsigned int v4l2_pipeline_subdevs_get(struct video_device *vdev, + struct v4l2_subdev **subdevs, + unsigned int size) +{ + struct media_entity *entity = &vdev->entity; + unsigned int idx = 0; + + while (1) { + struct media_pad *src_pad = NULL; + unsigned int i; + + /* Find remote source pad */ + for (i = 0; i < entity->num_pads; i++) { + struct media_pad *sink_pad = &entity->pads[i]; + + if (!(sink_pad->flags & MEDIA_PAD_FL_SINK)) + continue; + + src_pad = media_entity_remote_pad(sink_pad); + if (src_pad && + is_media_entity_v4l2_subdev(src_pad->entity)) + break; + } + if (i == entity->num_pads) + break; + + if (idx >= size) { + WARN_ON(1); + return 0; + } + + entity = src_pad->entity; + subdevs[idx++] = media_entity_to_v4l2_subdev(entity); + } + + return idx; +} + +__must_check int v4l2_pipeline_stream_enable(struct video_device *vdev) +{ + struct media_device *mdev = vdev->entity.graph_obj.mdev; + struct v4l2_subdev *subdevs[MEDIA_ENTITY_ENUM_MAX_DEPTH]; + struct v4l2_subdev *sd; + unsigned int i, size; + int ret; + + mutex_lock(&mdev->graph_mutex); + + size = v4l2_pipeline_subdevs_get(vdev, subdevs, ARRAY_SIZE(subdevs)); + + for (i = 0; i < size; i++) { + sd = subdevs[i]; + if (sd->stream_count++) + continue; + dev_dbg(mdev->dev, + "enabling stream for '%s'\n", sd->entity.name); + ret = v4l2_subdev_call(sd, video, s_stream, true); + if (ret && ret != -ENOIOCTLCMD) + goto err_stream_disable; + } + + mutex_unlock(&mdev->graph_mutex); + return 0; + +err_stream_disable: + do { + sd = subdevs[i]; + if (--sd->stream_count) + continue; + dev_dbg(mdev->dev, + "disabling stream for '%s'\n", sd->entity.name); + v4l2_subdev_call(sd, video, s_stream, false); + } while (i--); + + mutex_unlock(&mdev->graph_mutex); + return ret; +} +EXPORT_SYMBOL_GPL(v4l2_pipeline_stream_enable); + +void v4l2_pipeline_stream_disable(struct video_device *vdev) +{ + struct media_device *mdev = vdev->entity.graph_obj.mdev; + struct v4l2_subdev *subdevs[MEDIA_ENTITY_ENUM_MAX_DEPTH]; + unsigned int size; + + mutex_lock(&mdev->graph_mutex); + + size = v4l2_pipeline_subdevs_get(vdev, subdevs, ARRAY_SIZE(subdevs)); + + while (size--) { + struct v4l2_subdev *sd = subdevs[size]; + + if (--sd->stream_count) + continue; + dev_dbg(mdev->dev, + "disabling stream for '%s'\n", sd->entity.name); + v4l2_subdev_call(sd, video, s_stream, false); + } + + mutex_unlock(&mdev->graph_mutex); +} +EXPORT_SYMBOL_GPL(v4l2_pipeline_stream_disable); diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h index 150ee16ebd811..e833610b0f66d 100644 --- a/include/media/v4l2-common.h +++ b/include/media/v4l2-common.h @@ -519,6 +519,34 @@ int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, u32 pixelformat, int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt, u32 pixelformat, u32 width, u32 height); +/** + * v4l2_pipeline_stream_enable - Call .s_stream(true) callbacks in the stream + * @vdev: Starting video device + * + * Call .s_stream(true) callback in all the subdevices participating in the + * stream, i.e. following links from sink to source. + * + * Calls to this function can be nested, in which case the same number of + * v4l2_pipeline_stream_disable() calls will be required to stop streaming. + * The pipeline pointer must be identical for all nested calls to + * v4l2_pipeline_stream_enable(). + */ +__must_check int v4l2_pipeline_stream_enable(struct video_device *vdev); + +/** + * v4l2_pipeline_stream_disable - Call .s_stream(false) callbacks in the stream + * @vdev: Starting video device + * + * Call .s_stream(true) callback in all the subdevices participating in the + * stream, i.e. following links from sink to source. + * + * Calls to this function can be nested, in which case the same number of + * v4l2_pipeline_stream_disable() calls will be required to stop streaming. + * The pipeline pointer must be identical for all nested calls to + * v4l2_pipeline_stream_enable(). + */ +void v4l2_pipeline_stream_disable(struct video_device *vdev); + static inline u64 v4l2_buffer_get_timestamp(const struct v4l2_buffer *buf) { /* diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index a4848de598521..20f913a9f70c5 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -838,6 +838,7 @@ struct v4l2_subdev_platform_data { * @subdev_notifier: A sub-device notifier implicitly registered for the sub- * device using v4l2_device_register_sensor_subdev(). * @pdata: common part of subdevice platform data + * @stream_count: Stream count for the subdevice. * * Each instance of a subdev driver should create this struct, either * stand-alone or embedded in a larger struct. @@ -869,6 +870,7 @@ struct v4l2_subdev { struct v4l2_async_notifier *notifier; struct v4l2_async_notifier *subdev_notifier; struct v4l2_subdev_platform_data *pdata; + unsigned int stream_count; }; From patchwork Fri Apr 3 21:33:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Helen Koike X-Patchwork-Id: 11473685 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7190392C for ; Fri, 3 Apr 2020 21:33:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 581B3206F6 for ; Fri, 3 Apr 2020 21:33:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728417AbgDCVdl (ORCPT ); Fri, 3 Apr 2020 17:33:41 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:60636 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727829AbgDCVdl (ORCPT ); Fri, 3 Apr 2020 17:33:41 -0400 Received: from floko.floko.floko (unknown [IPv6:2804:431:e7cc:11ff:4f80:3de:e2b2:5c1d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: koike) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id 97D4F2935F9; Fri, 3 Apr 2020 22:33:35 +0100 (BST) From: Helen Koike To: linux-media@vger.kernel.org Cc: kernel@collabora.com, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, hans.verkuil@cisco.com, skhan@linuxfoundation.org, niklas.soderlund@ragnatech.se, mchehab@kernel.org, Helen Koike Subject: [PATCH v2 2/3] media: staging: rkisp1: use v4l2_pipeline_stream_{enable,disable} helpers Date: Fri, 3 Apr 2020 18:33:11 -0300 Message-Id: <20200403213312.1863876-3-helen.koike@collabora.com> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200403213312.1863876-1-helen.koike@collabora.com> References: <20200403213312.1863876-1-helen.koike@collabora.com> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Use v4l2_pipeline_stream_{enable,disable} to call .s_stream() subdevice callbacks through the pipeline. Tested by streaming on RockPi4 with imx219 and on Scarlet Chromebook. Signed-off-by: Helen Koike Reported-by: kbuild test robot --- Changes in v2: - rebase on top of new helpers prototypes drivers/staging/media/rkisp1/rkisp1-capture.c | 76 +------------------ 1 file changed, 3 insertions(+), 73 deletions(-) diff --git a/drivers/staging/media/rkisp1/rkisp1-capture.c b/drivers/staging/media/rkisp1/rkisp1-capture.c index 24fe6a7888aa4..0c2a357c4a12a 100644 --- a/drivers/staging/media/rkisp1/rkisp1-capture.c +++ b/drivers/staging/media/rkisp1/rkisp1-capture.c @@ -838,71 +838,6 @@ static void rkisp1_return_all_buffers(struct rkisp1_capture *cap, spin_unlock_irqrestore(&cap->buf.lock, flags); } -/* - * rkisp1_pipeline_sink_walk - Walk through the pipeline and call cb - * @from: entity at which to start pipeline walk - * @until: entity at which to stop pipeline walk - * - * Walk the entities chain starting at the pipeline video node and stop - * all subdevices in the chain. - * - * If the until argument isn't NULL, stop the pipeline walk when reaching the - * until entity. This is used to disable a partially started pipeline due to a - * subdev start error. - */ -static int rkisp1_pipeline_sink_walk(struct media_entity *from, - struct media_entity *until, - int (*cb)(struct media_entity *from, - struct media_entity *curr)) -{ - struct media_entity *entity = from; - struct media_pad *pad; - unsigned int i; - int ret; - - while (1) { - pad = NULL; - /* Find remote source pad */ - for (i = 0; i < entity->num_pads; i++) { - struct media_pad *spad = &entity->pads[i]; - - if (!(spad->flags & MEDIA_PAD_FL_SINK)) - continue; - pad = media_entity_remote_pad(spad); - if (pad && is_media_entity_v4l2_subdev(pad->entity)) - break; - } - if (!pad || !is_media_entity_v4l2_subdev(pad->entity)) - break; - - entity = pad->entity; - if (entity == until) - break; - - ret = cb(from, entity); - if (ret) - return ret; - } - - return 0; -} - -static int rkisp1_pipeline_disable_cb(struct media_entity *from, - struct media_entity *curr) -{ - struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(curr); - - return v4l2_subdev_call(sd, video, s_stream, false); -} - -static int rkisp1_pipeline_enable_cb(struct media_entity *from, - struct media_entity *curr) -{ - struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(curr); - - return v4l2_subdev_call(sd, video, s_stream, true); -} - static void rkisp1_stream_stop(struct rkisp1_capture *cap) { int ret; @@ -929,11 +864,7 @@ static void rkisp1_vb2_stop_streaming(struct vb2_queue *queue) rkisp1_stream_stop(cap); media_pipeline_stop(&node->vdev.entity); - ret = rkisp1_pipeline_sink_walk(&node->vdev.entity, NULL, - rkisp1_pipeline_disable_cb); - if (ret) - dev_err(rkisp1->dev, - "pipeline stream-off failed error:%d\n", ret); + v4l2_pipeline_stream_disable(&node->vdev); rkisp1_return_all_buffers(cap, VB2_BUF_STATE_ERROR); @@ -1005,8 +936,7 @@ rkisp1_vb2_start_streaming(struct vb2_queue *queue, unsigned int count) rkisp1_stream_start(cap); /* start sub-devices */ - ret = rkisp1_pipeline_sink_walk(entity, NULL, - rkisp1_pipeline_enable_cb); + ret = v4l2_pipeline_stream_enable(&cap->vnode.vdev); if (ret) goto err_stop_stream; @@ -1019,7 +949,7 @@ rkisp1_vb2_start_streaming(struct vb2_queue *queue, unsigned int count) return 0; err_pipe_disable: - rkisp1_pipeline_sink_walk(entity, NULL, rkisp1_pipeline_disable_cb); + v4l2_pipeline_stream_disable(entity, &cap->rkisp1->pipe); err_stop_stream: rkisp1_stream_stop(cap); v4l2_pipeline_pm_put(entity); From patchwork Fri Apr 3 21:33:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Helen Koike X-Patchwork-Id: 11473689 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6F75392A for ; Fri, 3 Apr 2020 21:33:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4D7D820737 for ; Fri, 3 Apr 2020 21:33:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728482AbgDCVdr (ORCPT ); Fri, 3 Apr 2020 17:33:47 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:60640 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727829AbgDCVdr (ORCPT ); Fri, 3 Apr 2020 17:33:47 -0400 Received: from floko.floko.floko (unknown [IPv6:2804:431:e7cc:11ff:4f80:3de:e2b2:5c1d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: koike) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id 66D34298779; Fri, 3 Apr 2020 22:33:40 +0100 (BST) From: Helen Koike To: linux-media@vger.kernel.org Cc: kernel@collabora.com, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, hans.verkuil@cisco.com, skhan@linuxfoundation.org, niklas.soderlund@ragnatech.se, mchehab@kernel.org, Helen Koike Subject: [PATCH v2 3/3] media: vimc: use v4l2_pipeline_stream_{enable,disable} helpers Date: Fri, 3 Apr 2020 18:33:12 -0300 Message-Id: <20200403213312.1863876-4-helen.koike@collabora.com> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200403213312.1863876-1-helen.koike@collabora.com> References: <20200403213312.1863876-1-helen.koike@collabora.com> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Use v4l2_pipeline_stream_{enable,disable} to call .s_stream() subdevice callbacks through the pipeline. Tested streaming works with: media-ctl -d /dev/media0 -V '"Sensor A":0[fmt:SBGGR8_1X8/640x480]' media-ctl -d /dev/media0 -V '"Debayer A":0[fmt:SBGGR8_1X8/640x480]' media-ctl -d /dev/media0 -V '"Sensor B":0[fmt:SBGGR8_1X8/640x480]' media-ctl -d /dev/media0 -V '"Debayer B":0[fmt:SBGGR8_1X8/640x480]' media-ctl -d /dev/media0 -V '"Scaler":0[fmt:RGB888_1X24/640x480]' media-ctl -d /dev/media0 -V '"Scaler":0[crop:(100,50)/400x150]' media-ctl -d /dev/media0 -V '"Scaler":1[fmt:RGB888_1X24/1920x1440]' v4l2-ctl -d /dev/video2 -v width=1200,height=450 v4l2-ctl -d /dev/video0 -v pixelformat=BA81 v4l2-ctl -d /dev/video1 -v pixelformat=BA81 v4l2-ctl --stream-mmap --stream-count=10 -d /dev/video2 --stream-to=/tmp/test.raw Signed-off-by: Helen Koike --- Changes in v2: - rebase on top of new helpers prototypes drivers/media/platform/vimc/vimc-capture.c | 28 +++++++----- drivers/media/platform/vimc/vimc-streamer.c | 49 +++------------------ 2 files changed, 23 insertions(+), 54 deletions(-) diff --git a/drivers/media/platform/vimc/vimc-capture.c b/drivers/media/platform/vimc/vimc-capture.c index 23e740c1c5c00..2206bfdec1c32 100644 --- a/drivers/media/platform/vimc/vimc-capture.c +++ b/drivers/media/platform/vimc/vimc-capture.c @@ -233,21 +233,27 @@ static int vimc_cap_start_streaming(struct vb2_queue *vq, unsigned int count) vcap->sequence = 0; - /* Start the media pipeline */ ret = media_pipeline_start(entity, &vcap->stream.pipe); - if (ret) { - vimc_cap_return_all_buffers(vcap, VB2_BUF_STATE_QUEUED); - return ret; - } + if (ret) + goto err_return_all_buffers; + + ret = v4l2_pipeline_stream_enable(&vcap->vdev); + if (ret) + goto err_stop_media_pipe; ret = vimc_streamer_s_stream(&vcap->stream, &vcap->ved, 1); - if (ret) { - media_pipeline_stop(entity); - vimc_cap_return_all_buffers(vcap, VB2_BUF_STATE_QUEUED); - return ret; - } + if (ret) + goto err_stop_stream; return 0; + +err_stop_stream: + v4l2_pipeline_stream_disable(&vcap->vdev); +err_stop_media_pipe: + media_pipeline_stop(entity); +err_return_all_buffers: + vimc_cap_return_all_buffers(vcap, VB2_BUF_STATE_QUEUED); + return ret; } /* @@ -260,6 +266,8 @@ static void vimc_cap_stop_streaming(struct vb2_queue *vq) vimc_streamer_s_stream(&vcap->stream, &vcap->ved, 0); + v4l2_pipeline_stream_disable(&vcap->vdev); + /* Stop the media pipeline */ media_pipeline_stop(&vcap->vdev.entity); diff --git a/drivers/media/platform/vimc/vimc-streamer.c b/drivers/media/platform/vimc/vimc-streamer.c index 65feb3c596db5..c0085f4695c2f 100644 --- a/drivers/media/platform/vimc/vimc-streamer.c +++ b/drivers/media/platform/vimc/vimc-streamer.c @@ -36,33 +36,6 @@ static struct media_entity *vimc_get_source_entity(struct media_entity *ent) return NULL; } -/** - * vimc_streamer_pipeline_terminate - Disable stream in all ved in stream - * - * @stream: the pointer to the stream structure with the pipeline to be - * disabled. - * - * Calls s_stream to disable the stream in each entity of the pipeline - * - */ -static void vimc_streamer_pipeline_terminate(struct vimc_stream *stream) -{ - struct vimc_ent_device *ved; - struct v4l2_subdev *sd; - - while (stream->pipe_size) { - stream->pipe_size--; - ved = stream->ved_pipeline[stream->pipe_size]; - stream->ved_pipeline[stream->pipe_size] = NULL; - - if (!is_media_entity_v4l2_subdev(ved->ent)) - continue; - - sd = media_entity_to_v4l2_subdev(ved->ent); - v4l2_subdev_call(sd, video, s_stream, 0); - } -} - /** * vimc_streamer_pipeline_init - Initializes the stream structure * @@ -82,27 +55,15 @@ static int vimc_streamer_pipeline_init(struct vimc_stream *stream, struct media_entity *entity; struct video_device *vdev; struct v4l2_subdev *sd; - int ret = 0; stream->pipe_size = 0; while (stream->pipe_size < VIMC_STREAMER_PIPELINE_MAX_SIZE) { if (!ved) { - vimc_streamer_pipeline_terminate(stream); + stream->pipe_size = 0; return -EINVAL; } stream->ved_pipeline[stream->pipe_size++] = ved; - if (is_media_entity_v4l2_subdev(ved->ent)) { - sd = media_entity_to_v4l2_subdev(ved->ent); - ret = v4l2_subdev_call(sd, video, s_stream, 1); - if (ret && ret != -ENOIOCTLCMD) { - dev_err(ved->dev, "subdev_call error %s\n", - ved->ent->name); - vimc_streamer_pipeline_terminate(stream); - return ret; - } - } - entity = vimc_get_source_entity(ved->ent); /* Check if the end of the pipeline was reached */ if (!entity) { @@ -111,7 +72,7 @@ static int vimc_streamer_pipeline_init(struct vimc_stream *stream, dev_err(ved->dev, "first entity in the pipe '%s' is not a source\n", ved->ent->name); - vimc_streamer_pipeline_terminate(stream); + stream->pipe_size = 0; return -EPIPE; } return 0; @@ -129,7 +90,7 @@ static int vimc_streamer_pipeline_init(struct vimc_stream *stream, } } - vimc_streamer_pipeline_terminate(stream); + stream->pipe_size = 0; return -EINVAL; } @@ -210,7 +171,7 @@ int vimc_streamer_s_stream(struct vimc_stream *stream, if (IS_ERR(stream->kthread)) { ret = PTR_ERR(stream->kthread); dev_err(ved->dev, "kthread_run failed with %d\n", ret); - vimc_streamer_pipeline_terminate(stream); + stream->pipe_size = 0; stream->kthread = NULL; return ret; } @@ -231,7 +192,7 @@ int vimc_streamer_s_stream(struct vimc_stream *stream, stream->kthread = NULL; - vimc_streamer_pipeline_terminate(stream); + stream->pipe_size = 0; } return 0;