From patchwork Thu Feb 26 15:59:24 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacek Anaszewski X-Patchwork-Id: 28423 X-Patchwork-Delegate: laurent.pinchart@ideasonboard.com Received: from mail.tu-berlin.de ([130.149.7.33]) by www.linuxtv.org with esmtp (Exim 4.72) (envelope-from ) id 1YR0sN-0005QN-IS; Thu, 26 Feb 2015 17:01:23 +0100 X-tubIT-Incoming-IP: 209.132.180.67 Received: from vger.kernel.org ([209.132.180.67]) by mail.tu-berlin.de (exim-4.72/mailfrontend-5) with esmtp id 1YR0sK-0001Vp-97; Thu, 26 Feb 2015 17:01:23 +0100 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754585AbbBZQBP (ORCPT + 1 other); Thu, 26 Feb 2015 11:01:15 -0500 Received: from mailout2.samsung.com ([203.254.224.25]:53204 "EHLO mailout2.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754485AbbBZQBM (ORCPT ); Thu, 26 Feb 2015 11:01:12 -0500 Received: from epcpsbgm1.samsung.com (epcpsbgm1 [203.254.230.26]) by mailout2.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0NKD004YQZ5YEGB0@mailout2.samsung.com> for linux-media@vger.kernel.org; Fri, 27 Feb 2015 01:01:10 +0900 (KST) X-AuditID: cbfee61a-f79c06d000004e71-79-54ef43467ac5 Received: from epmmp2 ( [203.254.227.17]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id A4.F0.20081.6434FE45; Fri, 27 Feb 2015 01:01:10 +0900 (KST) Received: from AMDC2362.DIGITAL.local ([106.120.53.23]) by mmp2.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0NKD00448Z32VO60@mmp2.samsung.com>; Fri, 27 Feb 2015 01:01:10 +0900 (KST) From: Jacek Anaszewski To: linux-media@vger.kernel.org Cc: sakari.ailus@linux.intel.com, laurent.pinchart@ideasonboard.com, gjasny@googlemail.com, hdegoede@redhat.com, kyungmin.park@samsung.com, Jacek Anaszewski Subject: [v4l-utils PATCH/RFC v5 14/14] Add a libv4l plugin for Exynos4 camera Date: Thu, 26 Feb 2015 16:59:24 +0100 Message-id: <1424966364-3647-15-git-send-email-j.anaszewski@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1424966364-3647-1-git-send-email-j.anaszewski@samsung.com> References: <1424966364-3647-1-git-send-email-j.anaszewski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprJLMWRmVeSWpSXmKPExsVy+t9jQV035/chBi9nK1lMnzKL0eLN8elM Fr1XnzNanG16w27ROXEJu0XPhq2sFp+2fGNyYPd4OmEyu8fsjpmsHvNOBnq833eVzaNvyypG j8+b5ALYorhsUlJzMstSi/TtErgyTrw6xVRwbypjxb4Jp9kaGHsquxg5OSQETCT23jnLAmGL SVy4t56ti5GLQ0hgOqPE2hdLmSCcdiaJG6/nMoJUsQkYSvx88ZoJxBYRkJd40nsDrINZYDej xLPle1hBEsICfhJTzj5iA7FZBFQl9jVfBGvmFfCQ+Pp5D9A6DqB1ChJzJtmAhDmBwlO/fAIr ERJwl/j6bjnbBEbeBYwMqxhFUwuSC4qT0nMN9YoTc4tL89L1kvNzNzGCA+yZ1A7GlQ0WhxgF OBiVeHgTst+FCLEmlhVX5h5ilOBgVhLh1bd+HyLEm5JYWZValB9fVJqTWnyIUZqDRUmcV8m+ LURIID2xJDU7NbUgtQgmy8TBKdXA2FnFZi2+bmFBweJ1s+f+nMnPHyHpu7DCfuv3d+9erT78 KoW7YK7ulKT/io/mvuTPK3fzL8+sUFySHi6yRuX3HsGA03/N0lZb8dTrs98592bdl1eXVyfl 2VcZTwup43b/d8VVevFOa6UECcXjF15ffpWR5jYryGFq7ttT0oaBbodTK7qDtiw/qsRSnJFo qMVcVJwIAJ+6Wv0sAgAA Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-PMX-Version: 6.0.0.2142326, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2015.2.26.155119 X-PMX-Spam: Gauge=IIIIIIIII, Probability=9%, Report=' MULTIPLE_RCPTS 0.1, HTML_00_01 0.05, HTML_00_10 0.05, SUPERLONG_LINE 0.05, BODY_SIZE_10000_PLUS 0, REFERENCES 0, __ANY_URI 0, __CP_MEDIA_BODY 0, __CP_URI_IN_BODY 0, __HAS_FROM 0, __HAS_MSGID 0, __HAS_X_MAILER 0, __HAS_X_MAILING_LIST 0, __IN_REP_TO 0, __MIME_TEXT_ONLY 0, __MULTIPLE_RCPTS_CC_X2 0, __REFERENCES 0, __SANE_MSGID 0, __SUBJ_ALPHA_END 0, __TO_MALFORMED_2 0, __TO_NO_NAME 0, __URI_NO_PATH 0, __URI_NS ' The plugin provides support for the media device on Exynos4 SoC. It performs single plane <-> multi plane API conversion, video pipeline linking and takes care of automatic data format negotiation for the whole pipeline, after intercepting VIDIOC_S_FMT or VIDIOC_TRY_FMT ioctls. Signed-off-by: Jacek Anaszewski Acked-by: Kyungmin Park --- configure.ac | 1 + lib/Makefile.am | 5 + lib/libv4l-exynos4-camera/Makefile.am | 7 + lib/libv4l-exynos4-camera/libv4l-exynos4-camera.c | 586 +++++++++++++++++++++ 4 files changed, 599 insertions(+) create mode 100644 lib/libv4l-exynos4-camera/Makefile.am create mode 100644 lib/libv4l-exynos4-camera/libv4l-exynos4-camera.c diff --git a/configure.ac b/configure.ac index 85f71e0..fa3679f 100644 --- a/configure.ac +++ b/configure.ac @@ -17,6 +17,7 @@ AC_CONFIG_FILES([Makefile lib/libdvbv5/Makefile lib/libv4l2rds/Makefile lib/libv4l-mplane/Makefile + lib/libv4l-exynos4-camera/Makefile utils/Makefile utils/libv4l2util/Makefile diff --git a/lib/Makefile.am b/lib/Makefile.am index ee0c3c5..56b3a9f 100644 --- a/lib/Makefile.am +++ b/lib/Makefile.am @@ -5,6 +5,11 @@ SUBDIRS = \ libv4l2rds \ libv4l-mplane +if WITH_V4LUTILS +SUBDIRS += \ + libv4l-exynos4-camera +endif + if LINUX_OS SUBDIRS += \ libdvbv5 diff --git a/lib/libv4l-exynos4-camera/Makefile.am b/lib/libv4l-exynos4-camera/Makefile.am new file mode 100644 index 0000000..23c60c6 --- /dev/null +++ b/lib/libv4l-exynos4-camera/Makefile.am @@ -0,0 +1,7 @@ +if WITH_V4L_PLUGINS +libv4l2plugin_LTLIBRARIES = libv4l-exynos4-camera.la +endif + +libv4l_exynos4_camera_la_SOURCES = libv4l-exynos4-camera.c ../../utils/media-ctl/libmediactl.c ../../utils/media-ctl/libv4l2subdev.c ../../utils/media-ctl/libv4l2media_ioctl.c ../../utils/media-ctl/mediatext.c +libv4l_exynos4_camera_la_CFLAGS = -fvisibility=hidden -std=gnu99 +libv4l_exynos4_camera_la_LDFLAGS = -avoid-version -module -shared -export-dynamic -lpthread diff --git a/lib/libv4l-exynos4-camera/libv4l-exynos4-camera.c b/lib/libv4l-exynos4-camera/libv4l-exynos4-camera.c new file mode 100644 index 0000000..29cfab2 --- /dev/null +++ b/lib/libv4l-exynos4-camera/libv4l-exynos4-camera.c @@ -0,0 +1,586 @@ +/* + * Copyright (c) 2015 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * Author: Jacek Anaszewski + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation; either version 2.1 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "../../utils/media-ctl/libv4l2media_ioctl.h" +#include "../../utils/media-ctl/mediactl.h" +#include "../../utils/media-ctl/mediatext.h" +#include "../../utils/media-ctl/v4l2subdev.h" +#include "libv4l-plugin.h" + +struct media_device; +struct media_entity; + +/* + * struct exynos4_camera_plugin - libv4l exynos4 camera plugin + * @media: media device comprising the vid_fd related video device + */ +struct exynos4_camera_plugin { + struct media_device *media; + struct media_entity *sink_entity; +}; + +#ifdef DEBUG +#define V4L2_EXYNOS4_DBG(format, ARG...)\ + printf("[%s:%d] [%s] " format " \n", __FILE__, __LINE__, __func__, ##ARG) +#else +#define V4L2_EXYNOS4_DBG(format, ARG...) +#endif + +#define V4L2_EXYNOS4_ERR(format, ARG...)\ + fprintf(stderr, "Libv4l Exynos4 camera plugin: "format "\n", ##ARG) + +#define V4L2_EXYNOS4_LOG(format, ARG...)\ + fprintf(stdout, "Libv4l Exynos4 camera plugin: "format "\n", ##ARG) + +#if HAVE_VISIBILITY +#define PLUGIN_PUBLIC __attribute__ ((visibility("default"))) +#else +#define PLUGIN_PUBLIC +#endif + +#define SYS_IOCTL(fd, cmd, arg) \ + syscall(SYS_ioctl, (int)(fd), (unsigned long)(cmd), (void *)(arg)) + +#define SIMPLE_CONVERT_IOCTL(fd, cmd, arg, __struc) ({ \ + int __ret; \ + struct __struc *req = arg; \ + uint32_t type = req->type; \ + req->type = convert_type(type); \ + __ret = SYS_IOCTL(fd, cmd, arg); \ + req->type = type; \ + __ret; \ + }) + +#define EXYNOS4_FIMC_DRV "exynos4-fimc" +#define EXYNOS4_FIMC_LITE_DRV "exynos-fimc-lit" +#define EXYNOS4_FIMC_IS_ISP_DRV "exynos4-fimc-is" +#define ENTITY_CAPTURE_SEGMENT "capture" +#define EXYNOS4_CAPTURE_CONF "/var/lib/libv4l/exynos4_capture_conf" +#define EXYNOS4_FIMC_IS_ISP "FIMC-IS-ISP" +#define EXYNOS4_FIMC_PREFIX "FIMC." +#define MAX_FMT_NEGO_NUM 50 + + +static int __capture_entity(const char *name) +{ + int cap_segment_pos; + + if (name == NULL) + return 0; + + cap_segment_pos = strlen(name) - strlen(ENTITY_CAPTURE_SEGMENT); + + if (strcmp(name + cap_segment_pos, ENTITY_CAPTURE_SEGMENT) == 0) + return 1; + + return 0; +} + +static int __adjust_format_to_fimc_is_isp(struct v4l2_mbus_framefmt *mbus_fmt) +{ + if (mbus_fmt == NULL) + return -EINVAL; + + mbus_fmt->width += 16; + mbus_fmt->height += 12; + + return 0; +} + +static int negotiate_pipeline_fmt(struct media_entity *pipeline, + struct v4l2_format *dev_fmt) +{ + struct media_entity *entity = pipeline; + struct v4l2_subdev_format subdev_fmt = { 0 }; + struct v4l2_mbus_framefmt mbus_fmt = { 0 }, common_fmt; + int repeat_negotiation, cnt_negotiation = 0, ret, pad_id; + + if (pipeline == NULL || dev_fmt == NULL) + return -EINVAL; + + mbus_fmt.width = dev_fmt->fmt.pix_mp.width; + mbus_fmt.height = dev_fmt->fmt.pix_mp.height; + mbus_fmt.field = dev_fmt->fmt.pix_mp.field; + mbus_fmt.colorspace = dev_fmt->fmt.pix_mp.colorspace; + + if (media_has_pipeline_entity(entity, EXYNOS4_FIMC_IS_ISP)) { + ret = __adjust_format_to_fimc_is_isp(&mbus_fmt); + if (ret < 0) + return ret; + } + + V4L2_EXYNOS4_DBG("Begin pipeline format negotiation..."); + + for (;;) { + repeat_negotiation = 0; + entity = pipeline; + + pad_id = media_entity_get_src_pad_index(entity); + + V4L2_EXYNOS4_DBG("Setting format on entity %s, pad: %d", + media_entity_get_name(entity), pad_id); + + ret = v4l2_subdev_set_format(entity, &mbus_fmt, + pad_id, V4L2_SUBDEV_FORMAT_TRY); + if (ret < 0) + return ret; + + common_fmt = mbus_fmt; + + entity = media_entity_get_next(entity); + + while (entity) { + pad_id = media_entity_get_sink_pad_index(entity); + + /* Set format on the entity src pad */ + V4L2_EXYNOS4_DBG("Setting format on the entity pad %s:%d: mbus_code: %s, width: %d, height: %d", + media_entity_get_name(entity), pad_id, + v4l2_subdev_pixelcode_to_string(mbus_fmt.code), + mbus_fmt.width, mbus_fmt.height); + + ret = v4l2_subdev_set_format(entity, &mbus_fmt, pad_id, + V4L2_SUBDEV_FORMAT_TRY); + if (ret < 0) + return ret; + + if (!v4l2_subdev_format_compare(&mbus_fmt, &common_fmt)) { + repeat_negotiation = 1; + break; + } + + /* + * Do not check format on FIMC.[n] source pad + * and stop negotiation. + */ + if (!strncmp(media_entity_get_name(entity), + EXYNOS4_FIMC_PREFIX, + strlen(EXYNOS4_FIMC_PREFIX))) + break; + + pad_id = media_entity_get_src_pad_index(entity); + + /* Get format on the entity sink pad */ + ret = v4l2_subdev_get_format(entity, &mbus_fmt, pad_id, + V4L2_SUBDEV_FORMAT_TRY); + if (ret < 0) + return -EINVAL; + + V4L2_EXYNOS4_DBG("Format propagated to the entity pad %s:%d: mbus_code: %s, width: %d, height: %d", + media_entity_get_name(entity), pad_id, + v4l2_subdev_pixelcode_to_string(mbus_fmt.code), + mbus_fmt.width, mbus_fmt.height); + + if (!strcmp(media_entity_get_name(entity), + EXYNOS4_FIMC_IS_ISP)) { + common_fmt.code = subdev_fmt.format.code; + common_fmt.colorspace = + subdev_fmt.format.colorspace; + common_fmt.width -= 16; + common_fmt.height -= 12; + } + + if (!v4l2_subdev_format_compare(&mbus_fmt, &common_fmt)) { + repeat_negotiation = 1; + break; + } + + entity = media_entity_get_next(entity); + + /* + * Stop if this is last element in the + * pipeline as it is not a sub-device. + */ + if (media_entity_get_next(entity) == NULL) + break; + } + + if (!repeat_negotiation) { + break; + } else if (++cnt_negotiation > MAX_FMT_NEGO_NUM) { + V4L2_EXYNOS4_DBG("Pipeline format negotiation failed!"); + return -EINVAL; + } + } + + dev_fmt->fmt.pix_mp.width = mbus_fmt.width; + dev_fmt->fmt.pix_mp.height = mbus_fmt.height; + dev_fmt->fmt.pix_mp.field = mbus_fmt.field; + dev_fmt->fmt.pix_mp.colorspace = mbus_fmt.colorspace; + + V4L2_EXYNOS4_DBG("Pipeline format successfuly negotiated"); + + return 0; +} + +static __u32 convert_type(__u32 type) +{ + switch (type) { + case V4L2_BUF_TYPE_VIDEO_CAPTURE: + return V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; + default: + return type; + } +} + +static int set_fmt_ioctl(struct media_device *media, + unsigned long int cmd, + struct v4l2_format *arg, + enum v4l2_subdev_format_whence set_mode) +{ + struct v4l2_format fmt = { 0 }; + int ret; + + fmt.type = convert_type(arg->type); + if (fmt.type != arg->type) { + fmt.fmt.pix_mp.width = arg->fmt.pix.width; + fmt.fmt.pix_mp.height = arg->fmt.pix.height; + fmt.fmt.pix_mp.pixelformat = arg->fmt.pix.pixelformat; + fmt.fmt.pix_mp.field = arg->fmt.pix.field; + fmt.fmt.pix_mp.colorspace = arg->fmt.pix.colorspace; + fmt.fmt.pix_mp.num_planes = 1; + fmt.fmt.pix_mp.flags = arg->fmt.pix.flags; + fmt.fmt.pix_mp.plane_fmt[0].bytesperline = arg->fmt.pix.bytesperline; + fmt.fmt.pix_mp.plane_fmt[0].sizeimage = arg->fmt.pix.sizeimage; + } else { + fmt = *arg; + } + + ret = negotiate_pipeline_fmt(media_get_pipeline(media), &fmt); + if (ret < 0) + return ret; + + if (set_mode == V4L2_SUBDEV_FORMAT_ACTIVE) { + ret = v4l2_subdev_apply_pipeline_fmt(media, &fmt); + if (ret < 0) + return ret; + } + + if (fmt.type != arg->type) { + arg->fmt.pix.width = fmt.fmt.pix_mp.width; + arg->fmt.pix.height = fmt.fmt.pix_mp.height; + arg->fmt.pix.pixelformat = fmt.fmt.pix_mp.pixelformat; + arg->fmt.pix.field = fmt.fmt.pix_mp.field; + arg->fmt.pix.colorspace = fmt.fmt.pix_mp.colorspace; + arg->fmt.pix.bytesperline = fmt.fmt.pix_mp.plane_fmt[0].bytesperline; + arg->fmt.pix.sizeimage = fmt.fmt.pix_mp.plane_fmt[0].sizeimage; + arg->fmt.pix.flags = fmt.fmt.pix_mp.flags; + } else { + *arg = fmt; + } + + return 0; +} + +static int get_fmt_ioctl(int fd, + unsigned long int cmd, + struct v4l2_format *arg) +{ + struct v4l2_format fmt = { 0 }; + int ret; + + fmt.type = convert_type(arg->type); + + if (fmt.type == arg->type) + return SYS_IOCTL(fd, cmd, arg); + + ret = SYS_IOCTL(fd, cmd, &fmt); + if (ret < 0) + return ret; + + memset(&arg->fmt.pix, 0, sizeof(arg->fmt.pix)); + arg->fmt.pix.width = fmt.fmt.pix_mp.width; + arg->fmt.pix.height = fmt.fmt.pix_mp.height; + arg->fmt.pix.pixelformat = fmt.fmt.pix_mp.pixelformat; + arg->fmt.pix.field = fmt.fmt.pix_mp.field; + arg->fmt.pix.colorspace = fmt.fmt.pix_mp.colorspace; + arg->fmt.pix.bytesperline = fmt.fmt.pix_mp.plane_fmt[0].bytesperline; + arg->fmt.pix.sizeimage = fmt.fmt.pix_mp.plane_fmt[0].sizeimage; + arg->fmt.pix.flags = fmt.fmt.pix_mp.flags; + + return ret; +} + +static int buf_ioctl(int fd, + unsigned long int cmd, + struct v4l2_buffer *arg) +{ + struct v4l2_buffer buf = *arg; + struct v4l2_plane plane = { 0 }; + int ret; + + buf.type = convert_type(arg->type); + + if (buf.type == arg->type) + return SYS_IOCTL(fd, cmd, arg); + + memcpy(&plane.m, &arg->m, sizeof(plane.m)); + plane.length = arg->length; + plane.bytesused = arg->bytesused; + + buf.m.planes = &plane; + buf.length = 1; + + ret = SYS_IOCTL(fd, cmd, &buf); + + arg->index = buf.index; + arg->memory = buf.memory; + arg->flags = buf.flags; + arg->field = buf.field; + arg->timestamp = buf.timestamp; + arg->timecode = buf.timecode; + arg->sequence = buf.sequence; + + arg->length = plane.length; + arg->bytesused = plane.bytesused; + memcpy(&arg->m, &plane.m, sizeof(arg->m)); + + return ret; +} + +static int querycap_ioctl(int fd, struct v4l2_capability *arg) +{ + int ret; + + ret = SYS_IOCTL(fd, VIDIOC_QUERYCAP, arg); + if (ret < 0) + return ret; + + arg->device_caps |= V4L2_CAP_VIDEO_CAPTURE; + arg->capabilities |= V4L2_CAP_VIDEO_CAPTURE; + + return ret; +} + +static void *plugin_init(int fd) +{ + struct v4l2_capability cap = { 0 }; + struct exynos4_camera_plugin *plugin = NULL; + const char *sink_entity_name; + struct media_device *media; + struct media_entity *sink_entity; + char video_devname[32]; + int ret; + + ret = SYS_IOCTL(fd, VIDIOC_QUERYCAP, &cap); + if (ret < 0) { + V4L2_EXYNOS4_ERR("Failed to query video capabilities."); + return NULL; + } + + /* Check if this is Exynos4 media device */ + if (strcmp((char *) cap.driver, EXYNOS4_FIMC_DRV) && + strcmp((char *) cap.driver, EXYNOS4_FIMC_LITE_DRV) && + strcmp((char *) cap.driver, EXYNOS4_FIMC_IS_ISP_DRV)) { + V4L2_EXYNOS4_ERR("Not an Exynos4 media device."); + return NULL; + } + + /* Obtain the node name of the opened device */ + ret = media_get_devname_by_fd(fd, video_devname); + if (ret < 0) { + V4L2_EXYNOS4_ERR("Failed to get video device node name."); + return NULL; + } + + /* + * Create the representation of a media device + * containing the opened video device. + */ + media = media_device_new_by_entity_devname(video_devname); + if (media == NULL) { + V4L2_EXYNOS4_ERR("Failed to create media device."); + return NULL; + } + +#ifdef DEBUG + media_debug_set_handler(media, (void (*)(void *, ...))fprintf, stdout); +#endif + + /* Get the entity representing the opened video device node */ + sink_entity = media_get_entity_by_devname(media, video_devname, + strlen(video_devname)); + if (sink_entity == NULL) { + V4L2_EXYNOS4_ERR("Failed to get sink entity name."); + goto err_get_sink_entity; + } + + /* + * Initialize sink_entity subdev fd with the one opened + * by the libv4l core to avoid losing it on pipeline opening. + */ + v4l2_subdev_create_with_fd(sink_entity, fd); + + sink_entity_name = media_entity_get_name(sink_entity); + + /* Check if video entity is of capture type, not m2m */ + if (!__capture_entity(sink_entity_name)) { + V4L2_EXYNOS4_ERR("Device not of capture type."); + goto err_get_sink_entity; + } + + V4L2_EXYNOS4_ERR("before parsing"); + /* Parse media configuration file and apply its settings */ + ret = mediatext_parse_setup_config(media, EXYNOS4_CAPTURE_CONF); + if (ret < 0) { + V4L2_EXYNOS4_ERR("Media config parser error."); + goto err_get_sink_entity; + } + + /* + * Discover the pipeline of sub-devices from a camera sensor + * to the opened video device. + */ + ret = media_discover_pipeline_by_entity(media, sink_entity); + if (ret < 0) { + V4L2_EXYNOS4_ERR("Error discovering video pipeline."); + goto err_get_sink_entity; + } + + /* Open all sub-devices in the discovered pipeline */ + ret = v4l2_subdev_open_pipeline(media); + if (ret < 0) { + V4L2_EXYNOS4_ERR("Error opening video pipeline."); + goto err_get_sink_entity; + } + + /* Allocate private data */ + plugin = calloc(1, sizeof(*plugin)); + if (!plugin) + goto err_validate_controls; + + plugin->media = media; + plugin->sink_entity = sink_entity; + + V4L2_EXYNOS4_LOG("Initialized exynos4-camera plugin."); + + return plugin; + +err_validate_controls: + v4l2_subdev_release(sink_entity, false); + v4l2_subdev_release_pipeline(media); +err_get_sink_entity: + if (media) + media_device_unref(media); + return NULL; +} + +static void plugin_close(void *dev_ops_priv) +{ + struct exynos4_camera_plugin *plugin = dev_ops_priv; + struct media_device *media; + + if (plugin == NULL) + return; + + /* release sink entity sub-device, but don't close fd */ + v4l2_subdev_release(plugin->sink_entity, false); + + media = plugin->media; + v4l2_subdev_release_pipeline(media); + media_device_unref(media); + + free(plugin); +} + +static int plugin_ioctl(void *dev_ops_priv, int fd, unsigned long int cmd, + void *arg) +{ + struct exynos4_camera_plugin *plugin = dev_ops_priv; + struct media_device *media; + + if (plugin == NULL || arg == NULL) + return -EINVAL; + + media = plugin->media; + + if (media == NULL) + return -EINVAL; + + switch (cmd) { + case VIDIOC_S_CTRL: + case VIDIOC_G_CTRL: + return media_ioctl_ctrl(media, cmd, arg); + case VIDIOC_S_EXT_CTRLS: + case VIDIOC_G_EXT_CTRLS: + case VIDIOC_TRY_EXT_CTRLS: + return media_ioctl_ext_ctrl(media, cmd, arg); + case VIDIOC_QUERYCTRL: + return media_ioctl_queryctrl(media, arg); + case VIDIOC_QUERY_EXT_CTRL: + return media_ioctl_query_ext_ctrl(media, arg); + case VIDIOC_QUERYMENU: + return media_ioctl_querymenu(media, arg); + case VIDIOC_TRY_FMT: + return set_fmt_ioctl(media, cmd, arg, + V4L2_SUBDEV_FORMAT_TRY); + case VIDIOC_S_FMT: + return set_fmt_ioctl(media, cmd, arg, + V4L2_SUBDEV_FORMAT_ACTIVE); + case VIDIOC_G_FMT: + return get_fmt_ioctl(fd, cmd, arg); + case VIDIOC_QUERYCAP: + return querycap_ioctl(fd, arg); + case VIDIOC_QBUF: + case VIDIOC_DQBUF: + case VIDIOC_QUERYBUF: + case VIDIOC_PREPARE_BUF: + return buf_ioctl(fd, cmd, arg); + case VIDIOC_REQBUFS: + return SIMPLE_CONVERT_IOCTL(fd, cmd, arg, + v4l2_requestbuffers); + case VIDIOC_ENUM_FMT: + return SIMPLE_CONVERT_IOCTL(fd, cmd, arg, v4l2_fmtdesc); + case VIDIOC_CROPCAP: + return SIMPLE_CONVERT_IOCTL(fd, cmd, arg, v4l2_cropcap); + case VIDIOC_STREAMON: + case VIDIOC_STREAMOFF: + { + int *arg_type = (int *) arg; + __u32 type; + + type = convert_type(*arg_type); + + if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE && + type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { + V4L2_EXYNOS4_ERR("Invalid buffer type."); + return -EINVAL; + } + + return SYS_IOCTL(fd, cmd, &type); + } + + default: + return SYS_IOCTL(fd, cmd, arg); + } +} + +PLUGIN_PUBLIC const struct libv4l_dev_ops libv4l2_plugin = { + .init = &plugin_init, + .close = &plugin_close, + .ioctl = &plugin_ioctl, +};