From patchwork Thu Jun 13 15:06:13 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Andr=C3=A9_Almeida?= X-Patchwork-Id: 10992125 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 118F11515 for ; Thu, 13 Jun 2019 15:07:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F2F761FF41 for ; Thu, 13 Jun 2019 15:07:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E686A205A4; Thu, 13 Jun 2019 15:07:35 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 903411FF41 for ; Thu, 13 Jun 2019 15:07:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387590AbfFMPHJ (ORCPT ); Thu, 13 Jun 2019 11:07:09 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:54480 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733077AbfFMPHH (ORCPT ); Thu, 13 Jun 2019 11:07:07 -0400 Received: from turingmachine.home (unknown [IPv6:2804:431:d719:d9b5:d711:794d:1c68:5ed3]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: tonyk) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id D218D28389F; Thu, 13 Jun 2019 16:07:03 +0100 (BST) From: =?utf-8?q?Andr=C3=A9_Almeida?= To: linux-media@vger.kernel.org Cc: mchehab@kernel.org, hverkuil@xs4all.nl, helen.koike@collabora.com, kernel@collabora.com, lkcamp@lists.libreplanetbr.org, linux-kernel@vger.kernel.org, =?utf-8?q?Andr=C3=A9_Almeida?= Subject: [PATCH 1/4] media: vimc: debayer: Fix typos Date: Thu, 13 Jun 2019 12:06:13 -0300 Message-Id: <20190613150616.19336-2-andrealmeid@collabora.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190613150616.19336-1-andrealmeid@collabora.com> References: <20190613150616.19336-1-andrealmeid@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 X-Virus-Scanned: ClamAV using ClamSMTP Fix typo on "tranforming". Add a line break so it keeps under 80 columns. Fix typo on "[it] need". Signed-off-by: André Almeida --- drivers/media/platform/vimc/vimc-debayer.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/vimc/vimc-debayer.c b/drivers/media/platform/vimc/vimc-debayer.c index 310c0d0eefa2..00598fbf3cba 100644 --- a/drivers/media/platform/vimc/vimc-debayer.c +++ b/drivers/media/platform/vimc/vimc-debayer.c @@ -16,14 +16,16 @@ #include "vimc-common.h" #define VIMC_DEB_DRV_NAME "vimc-debayer" -/* This module only supports tranforming a bayer format to V4L2_PIX_FMT_RGB24 */ +/* This module only supports transforming a bayer format + * to V4L2_PIX_FMT_RGB24 + */ #define VIMC_DEB_SRC_PIXFMT V4L2_PIX_FMT_RGB24 #define VIMC_DEB_SRC_MBUS_FMT_DEFAULT MEDIA_BUS_FMT_RGB888_1X24 static unsigned int deb_mean_win_size = 3; module_param(deb_mean_win_size, uint, 0000); MODULE_PARM_DESC(deb_mean_win_size, " the window size to calculate the mean.\n" - "NOTE: the window size need to be an odd number, as the main pixel " + "NOTE: the window size needs to be an odd number, as the main pixel " "stays in the center of the window, otherwise the next odd number " "is considered"); From patchwork Thu Jun 13 15:06:14 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Andr=C3=A9_Almeida?= X-Patchwork-Id: 10992117 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7866E1398 for ; Thu, 13 Jun 2019 15:07:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 659861FF41 for ; Thu, 13 Jun 2019 15:07:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 59F1E20572; Thu, 13 Jun 2019 15:07:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1ECF7204FA for ; Thu, 13 Jun 2019 15:07:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387621AbfFMPHM (ORCPT ); Thu, 13 Jun 2019 11:07:12 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:54488 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387604AbfFMPHK (ORCPT ); Thu, 13 Jun 2019 11:07:10 -0400 Received: from turingmachine.home (unknown [IPv6:2804:431:d719:d9b5:d711:794d:1c68:5ed3]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: tonyk) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id 6CB4D281A15; Thu, 13 Jun 2019 16:07:07 +0100 (BST) From: =?utf-8?q?Andr=C3=A9_Almeida?= To: linux-media@vger.kernel.org Cc: mchehab@kernel.org, hverkuil@xs4all.nl, helen.koike@collabora.com, kernel@collabora.com, lkcamp@lists.libreplanetbr.org, linux-kernel@vger.kernel.org, =?utf-8?q?Andr=C3=A9_Almeida?= Subject: [PATCH 2/4] media: vimc: Makefile: file cleanup Date: Thu, 13 Jun 2019 12:06:14 -0300 Message-Id: <20190613150616.19336-3-andrealmeid@collabora.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190613150616.19336-1-andrealmeid@collabora.com> References: <20190613150616.19336-1-andrealmeid@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 X-Virus-Scanned: ClamAV using ClamSMTP Remove redundant Makefile rules (vimc_capture-objs, ...). Stop exposing vimc-{common, streamer} as modules, since there's no use case where they would be individually added/removed from Vimc. As consequence, remove MODULE_ macros from vimc-{common, streamer}. `-objs` is fitted for building host programs, change to `-y`, more straightforward for device drivers. Signed-off-by: André Almeida Suggested-by: Helen Koike --- drivers/media/platform/vimc/Makefile | 12 +++--------- drivers/media/platform/vimc/vimc-common.c | 4 ---- drivers/media/platform/vimc/vimc-streamer.c | 4 ---- 3 files changed, 3 insertions(+), 17 deletions(-) diff --git a/drivers/media/platform/vimc/Makefile b/drivers/media/platform/vimc/Makefile index c4fc8e7d365a..96d06f030c31 100644 --- a/drivers/media/platform/vimc/Makefile +++ b/drivers/media/platform/vimc/Makefile @@ -1,11 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 -vimc-objs := vimc-core.o -vimc_capture-objs := vimc-capture.o -vimc_common-objs := vimc-common.o -vimc_debayer-objs := vimc-debayer.o -vimc_scaler-objs := vimc-scaler.o -vimc_sensor-objs := vimc-sensor.o -vimc_streamer-objs := vimc-streamer.o +vimc-y := vimc-core.o vimc-common.o vimc-streamer.o -obj-$(CONFIG_VIDEO_VIMC) += vimc.o vimc_capture.o vimc_common.o vimc-debayer.o \ - vimc_scaler.o vimc_sensor.o vimc_streamer.o +obj-$(CONFIG_VIDEO_VIMC) += vimc.o vimc-capture.o vimc-debayer.o \ + vimc-scaler.o vimc-sensor.o diff --git a/drivers/media/platform/vimc/vimc-common.c b/drivers/media/platform/vimc/vimc-common.c index f4d2073076ed..03016f204d05 100644 --- a/drivers/media/platform/vimc/vimc-common.c +++ b/drivers/media/platform/vimc/vimc-common.c @@ -377,7 +377,3 @@ void vimc_ent_sd_unregister(struct vimc_ent_device *ved, struct v4l2_subdev *sd) v4l2_device_unregister_subdev(sd); } EXPORT_SYMBOL_GPL(vimc_ent_sd_unregister); - -MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Common"); -MODULE_AUTHOR("Helen Koike "); -MODULE_LICENSE("GPL"); diff --git a/drivers/media/platform/vimc/vimc-streamer.c b/drivers/media/platform/vimc/vimc-streamer.c index 26b674259489..236ade38f1da 100644 --- a/drivers/media/platform/vimc/vimc-streamer.c +++ b/drivers/media/platform/vimc/vimc-streamer.c @@ -188,7 +188,3 @@ int vimc_streamer_s_stream(struct vimc_stream *stream, return 0; } EXPORT_SYMBOL_GPL(vimc_streamer_s_stream); - -MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Streamer"); -MODULE_AUTHOR("Lucas A. M. Magalhães "); -MODULE_LICENSE("GPL"); From patchwork Thu Jun 13 15:06:15 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Andr=C3=A9_Almeida?= X-Patchwork-Id: 10992123 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D88201515 for ; Thu, 13 Jun 2019 15:07:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C42FD1FF41 for ; Thu, 13 Jun 2019 15:07:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B0C0D204FA; Thu, 13 Jun 2019 15:07:32 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 524ED205A9 for ; Thu, 13 Jun 2019 15:07:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387673AbfFMPHQ (ORCPT ); Thu, 13 Jun 2019 11:07:16 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:54498 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733129AbfFMPHP (ORCPT ); Thu, 13 Jun 2019 11:07:15 -0400 Received: from turingmachine.home (unknown [IPv6:2804:431:d719:d9b5:d711:794d:1c68:5ed3]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: tonyk) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id 7F63628389F; Thu, 13 Jun 2019 16:07:10 +0100 (BST) From: =?utf-8?q?Andr=C3=A9_Almeida?= To: linux-media@vger.kernel.org Cc: mchehab@kernel.org, hverkuil@xs4all.nl, helen.koike@collabora.com, kernel@collabora.com, lkcamp@lists.libreplanetbr.org, linux-kernel@vger.kernel.org, =?utf-8?q?Andr=C3=A9_Almeida?= Subject: [PATCH 3/4] media: vimc: stream: add missing function documentation Date: Thu, 13 Jun 2019 12:06:15 -0300 Message-Id: <20190613150616.19336-4-andrealmeid@collabora.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190613150616.19336-1-andrealmeid@collabora.com> References: <20190613150616.19336-1-andrealmeid@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 X-Virus-Scanned: ClamAV using ClamSMTP Add comments at vimc_streamer_s_stream and vimc_streamer_thread, making the vimc-stream totally documented. Signed-off-by: André Almeida --- drivers/media/platform/vimc/vimc-streamer.c | 22 +++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/media/platform/vimc/vimc-streamer.c b/drivers/media/platform/vimc/vimc-streamer.c index 236ade38f1da..8556cc6e8654 100644 --- a/drivers/media/platform/vimc/vimc-streamer.c +++ b/drivers/media/platform/vimc/vimc-streamer.c @@ -122,6 +122,14 @@ static int vimc_streamer_pipeline_init(struct vimc_stream *stream, return -EINVAL; } +/* + * vimc_streamer_thread - process frames through the pipeline + * + * @data: vimc_stream struct of the current streaming + * + * From the source to the sink, gets a frame from each subdevice and send to + * the next one of the pipeline in a fixed framerate. + */ static int vimc_streamer_thread(void *data) { struct vimc_stream *stream = data; @@ -149,6 +157,20 @@ static int vimc_streamer_thread(void *data) return 0; } +/* + * vimc_streamer_s_stream - start/stop the streaming on the media pipeline + * + * @stream: the pointer to the stream structure of the current stream + * @ved: pointer to the vimc entity of the entity of the stream + * @enable: flag to determine if stream should start/stop + * + * When starting, checks if there's no stream->kthread allocated. This should + * indicates that a streaming is already running. Then, it's initialize + * the pipeline, create and run a kthread to consume buffers through the + * pipeline. + * When stopping, analogously check's it there's a streaming running, stops + * the thread and terminate the pipeline. + */ int vimc_streamer_s_stream(struct vimc_stream *stream, struct vimc_ent_device *ved, int enable) From patchwork Thu Jun 13 15:06:16 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Andr=C3=A9_Almeida?= X-Patchwork-Id: 10992121 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 96FE715E6 for ; Thu, 13 Jun 2019 15:07:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 859CA1FF41 for ; Thu, 13 Jun 2019 15:07:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 76301205FD; Thu, 13 Jun 2019 15:07:32 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CE22A1FF41 for ; Thu, 13 Jun 2019 15:07:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733055AbfFMPHV (ORCPT ); Thu, 13 Jun 2019 11:07:21 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:54504 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387679AbfFMPHS (ORCPT ); Thu, 13 Jun 2019 11:07:18 -0400 Received: from turingmachine.home (unknown [IPv6:2804:431:d719:d9b5:d711:794d:1c68:5ed3]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: tonyk) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id 18A252852D1; Thu, 13 Jun 2019 16:07:13 +0100 (BST) From: =?utf-8?q?Andr=C3=A9_Almeida?= To: linux-media@vger.kernel.org Cc: mchehab@kernel.org, hverkuil@xs4all.nl, helen.koike@collabora.com, kernel@collabora.com, lkcamp@lists.libreplanetbr.org, linux-kernel@vger.kernel.org, =?utf-8?q?Andr=C3=A9_Almeida?= Subject: [PATCH 4/4] media: docs: create vimc documentation Date: Thu, 13 Jun 2019 12:06:16 -0300 Message-Id: <20190613150616.19336-5-andrealmeid@collabora.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190613150616.19336-1-andrealmeid@collabora.com> References: <20190613150616.19336-1-andrealmeid@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 X-Virus-Scanned: ClamAV using ClamSMTP Create vimc documentation file to explain it basics features, it's topology, how to configure it and to document vimc's subdevices. Signed-off-by: André Almeida Suggested-by: Helen Koike --- Documentation/media/v4l-drivers/index.rst | 1 + Documentation/media/v4l-drivers/vimc.dot | 22 +++++ Documentation/media/v4l-drivers/vimc.rst | 98 +++++++++++++++++++++++ 3 files changed, 121 insertions(+) create mode 100644 Documentation/media/v4l-drivers/vimc.dot create mode 100644 Documentation/media/v4l-drivers/vimc.rst diff --git a/Documentation/media/v4l-drivers/index.rst b/Documentation/media/v4l-drivers/index.rst index 33a055907258..c4c78a28654c 100644 --- a/Documentation/media/v4l-drivers/index.rst +++ b/Documentation/media/v4l-drivers/index.rst @@ -64,5 +64,6 @@ For more details see the file COPYING in the source distribution of Linux. si476x soc-camera uvcvideo + vimc vivid zr364xx diff --git a/Documentation/media/v4l-drivers/vimc.dot b/Documentation/media/v4l-drivers/vimc.dot new file mode 100644 index 000000000000..57863a13fa39 --- /dev/null +++ b/Documentation/media/v4l-drivers/vimc.dot @@ -0,0 +1,22 @@ +# SPDX-License-Identifier: GPL-2.0 + +digraph board { + rankdir=TB + n00000001 [label="{{} | Sensor A\n/dev/v4l-subdev0 | { 0}}", shape=Mrecord, style=filled, fillcolor=green] + n00000001:port0 -> n00000005:port0 [style=bold] + n00000001:port0 -> n0000000b [style=bold] + n00000003 [label="{{} | Sensor B\n/dev/v4l-subdev1 | { 0}}", shape=Mrecord, style=filled, fillcolor=green] + n00000003:port0 -> n00000008:port0 [style=bold] + n00000003:port0 -> n0000000f [style=bold] + n00000005 [label="{{ 0} | Debayer A\n/dev/v4l-subdev2 | { 1}}", shape=Mrecord, style=filled, fillcolor=green] + n00000005:port1 -> n00000017:port0 + n00000008 [label="{{ 0} | Debayer B\n/dev/v4l-subdev3 | { 1}}", shape=Mrecord, style=filled, fillcolor=green] + n00000008:port1 -> n00000017:port0 [style=dashed] + n0000000b [label="Raw Capture 0\n/dev/video0", shape=box, style=filled, fillcolor=yellow] + n0000000f [label="Raw Capture 1\n/dev/video1", shape=box, style=filled, fillcolor=yellow] + n00000013 [label="RGB/YUV Input\n/dev/video2", shape=box, style=filled, fillcolor=yellow] + n00000013 -> n00000017:port0 [style=dashed] + n00000017 [label="{{ 0} | Scaler\n/dev/v4l-subdev4 | { 1}}", shape=Mrecord, style=filled, fillcolor=green] + n00000017:port1 -> n0000001a [style=bold] + n0000001a [label="RGB/YUV Capture\n/dev/video3", shape=box, style=filled, fillcolor=yellow] +} diff --git a/Documentation/media/v4l-drivers/vimc.rst b/Documentation/media/v4l-drivers/vimc.rst new file mode 100644 index 000000000000..bd98c55a0025 --- /dev/null +++ b/Documentation/media/v4l-drivers/vimc.rst @@ -0,0 +1,98 @@ +.. SPDX-License-Identifier: GPL-2.0 + +The Virtual Media Controller Driver (vimc) +========================================== + +The Vimc driver emulates the V4L2 API and the Media API as well. Its goal is to +emulate complex devices and topologies. In the actual state, it has a capture +device and three subdevices: sensor, debayer and scaler. + +Topology +-------- + +The topology is hardcoded, although you could modify it on vimc-core and +recompile the driver to achieve your own topology. This is the default topology: + +.. _vimc_topology_graph: + +.. kernel-figure:: vimc.dot + :alt: vimc.dot + :align: center + + Media pipeline graph on Vimc + +Configuring the topology +~~~~~~~~~~~~~~~~~~~~~~~~ + +Each subdevice will come with its default configuration (pixelformat, height, +width, ...). One needs to configure the topology in order to match the +configuration on each linked subdevice to stream frames through the pipeline. +If the configuration doesn't match, the stream will fail. The ``v4l2-utils`` +is a bundle of user-space applications, that comes with ``media-ctl`` and +``v4l2-clt`` that can be used in combination to configure. This sequence of +commands fits for the default topology: + +.. code-block:: bash + + media-ctl -d platform:vimc -V '"Sensor A":0[fmt:SBGGR8_1X8/640x480]' + media-ctl -d platform:vimc -V '"Debayer A":0[fmt:SBGGR8_1X8/640x480]' + media-ctl -d platform:vimc -V '"Sensor B":0[fmt:SBGGR8_1X8/640x480]' + media-ctl -d platform:vimc -V '"Debayer B":0[fmt:SBGGR8_1X8/640x480]' + v4l2-ctl -z platform:vimc -d "RGB/YUV Capture" -v width=1920,height=1440 + v4l2-ctl -z platform:vimc -d "Raw Capture 0" -v pixelformat=BA81 + v4l2-ctl -z platform:vimc -d "Raw Capture 1" -v pixelformat=BA81 + +Subdevices +---------- + +Subdevices define the behavior of an entity in the topology. Depending on the +subdevice, the entity can have multiple pads of type source or sink. + +vimc-sensor: + Generates images in several formats using video test pattern generator. + Exposes: + + * 1 Pad source + +vimc-debayer: + Transforms images in bayer format into a non-bayer format. + Exposes: + + * 1 Pad sink + * 1 Pad source + +vimc-scaler: + Multiplies the size of the image by 9 (this value can be configured, + see at `Modules options`_). + Exposes: + + * 1 Pad sink + * 1 Pad source + +vimc-capture: + Exposes node /dev/videoX to allow userspace to capture the stream. + Exposes: + + * 1 Pad sink + * 1 Pad source + +Modules options +--------------- + +Vimc has a few module parameters to configure the driver. You should pass +those arguments to each subdevice, not for the Vimc module. For example:: + + vimc_subvice.param=value + +* ``vimc_scaler.sca_mult=`` + + Image size multiplier factor to be used to multiply both width and + height, so the image size will be ``sca_mult^2`` bigger than the + original one. Currently, only supports scaling up (the default value + is 3). + +* ``vimc_debayer.deb_mean_win_size=`` + + Window size to calculate the mean. Note: the window size needs to be an + odd number, as the main pixel stays in the center of the window, + otherwise the next odd number is considered (the default value is 3).