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[media] vimc: Subdevices as modules

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Change the core structure for adding subdevices in the topology.
Instead of calling the specific create function for each subdevice,
inject a child platform_device with the driver's name.
Each type of node in the topology (sensor, capture, debayer, scaler)
will register a platform_driver with the corresponding name through the
component subsystem.
Implementing a new subdevice type doesn't require vimc-core to be altered.

This facilitates future implementation of dynamic entities, where
hotpluging an entity in the topology is just a matter of
registering/unregistering a platform_device in the system.
It also facilitates other implementations of different nodes without
touching the core code and remove the need of a header file for each
type of node.

Signed-off-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Helen Fornazier 2017-06-19 14:00:18 -03:00 committed by Mauro Carvalho Chehab
parent 535d296f48
commit 4a29b70907
8 changed files with 345 additions and 394 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/media/platform/vimc/Makefile
View File

@ -1,3 +1,6 @@
vimc-objs := vimc-core.o vimc-capture.o vimc-common.o vimc-sensor.o
vimc-objs := vimc-core.o
vimc_capture-objs := vimc-capture.o
vimc_common-objs := vimc-common.o
vimc_sensor-objs := vimc-sensor.o
obj-$(CONFIG_VIDEO_VIMC) += vimc.o
obj-$(CONFIG_VIDEO_VIMC) += vimc.o vimc_capture.o vimc_common.o vimc_sensor.o

99
drivers/media/platform/vimc/vimc-capture.c
View File

@ -15,15 +15,21 @@
*
*/
#include <linux/component.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-core.h>
#include <media/videobuf2-vmalloc.h>
#include "vimc-capture.h"
#include "vimc-common.h"
#define VIMC_CAP_DRV_NAME "vimc-capture"
struct vimc_cap_device {
struct vimc_ent_device ved;
struct video_device vdev;
struct device *dev;
struct v4l2_pix_format format;
struct vb2_queue queue;
struct list_head buf_list;
@ -131,7 +137,7 @@ static int vimc_cap_s_fmt_vid_cap(struct file *file, void *priv,
vimc_cap_try_fmt_vid_cap(file, priv, f);
dev_dbg(vcap->vdev.v4l2_dev->dev, "%s: format update: "
dev_dbg(vcap->dev, "%s: format update: "
"old:%dx%d (0x%x, %d, %d, %d, %d) "
"new:%dx%d (0x%x, %d, %d, %d, %d)\n", vcap->vdev.name,
/* old */
@ -309,8 +315,7 @@ static int vimc_cap_buffer_prepare(struct vb2_buffer *vb)
unsigned long size = vcap->format.sizeimage;
if (vb2_plane_size(vb, 0) < size) {
dev_err(vcap->vdev.v4l2_dev->dev,
"%s: buffer too small (%lu < %lu)\n",
dev_err(vcap->dev, "%s: buffer too small (%lu < %lu)\n",
vcap->vdev.name, vb2_plane_size(vb, 0), size);
return -EINVAL;
}
@ -335,8 +340,10 @@ static const struct media_entity_operations vimc_cap_mops = {
.link_validate = vimc_link_validate,
};
static void vimc_cap_destroy(struct vimc_ent_device *ved)
static void vimc_cap_comp_unbind(struct device *comp, struct device *master,
void *master_data)
{
struct vimc_ent_device *ved = dev_get_drvdata(comp);
struct vimc_cap_device *vcap = container_of(ved, struct vimc_cap_device,
ved);
@ -385,42 +392,35 @@ static void vimc_cap_process_frame(struct vimc_ent_device *ved,
vb2_buffer_done(&vimc_buf->vb2.vb2_buf, VB2_BUF_STATE_DONE);
}
struct vimc_ent_device *vimc_cap_create(struct v4l2_device *v4l2_dev,
const char *const name,
u16 num_pads,
const unsigned long *pads_flag)
static int vimc_cap_comp_bind(struct device *comp, struct device *master,
void *master_data)
{
struct v4l2_device *v4l2_dev = master_data;
struct vimc_platform_data *pdata = comp->platform_data;
const struct vimc_pix_map *vpix;
struct vimc_cap_device *vcap;
struct video_device *vdev;
struct vb2_queue *q;
int ret;
/*
* Check entity configuration params
* NOTE: we only support a single sink pad
*/
if (!name || num_pads != 1 || !pads_flag ||
!(pads_flag[0] & MEDIA_PAD_FL_SINK))
return ERR_PTR(-EINVAL);
/* Allocate the vimc_cap_device struct */
vcap = kzalloc(sizeof(*vcap), GFP_KERNEL);
if (!vcap)
return ERR_PTR(-ENOMEM);
return -ENOMEM;
/* Allocate the pads */
vcap->ved.pads = vimc_pads_init(num_pads, pads_flag);
vcap->ved.pads =
vimc_pads_init(1, (const unsigned long[1]) {MEDIA_PAD_FL_SINK});
if (IS_ERR(vcap->ved.pads)) {
ret = PTR_ERR(vcap->ved.pads);
goto err_free_vcap;
}
/* Initialize the media entity */
vcap->vdev.entity.name = name;
vcap->vdev.entity.name = pdata->entity_name;
vcap->vdev.entity.function = MEDIA_ENT_F_IO_V4L;
ret = media_entity_pads_init(&vcap->vdev.entity,
num_pads, vcap->ved.pads);
1, vcap->ved.pads);
if (ret)
goto err_clean_pads;
@ -441,9 +441,8 @@ struct vimc_ent_device *vimc_cap_create(struct v4l2_device *v4l2_dev,
ret = vb2_queue_init(q);
if (ret) {
dev_err(vcap->vdev.v4l2_dev->dev,
"%s: vb2 queue init failed (err=%d)\n",
vcap->vdev.name, ret);
dev_err(comp, "%s: vb2 queue init failed (err=%d)\n",
pdata->entity_name, ret);
goto err_clean_m_ent;
}
@ -459,10 +458,11 @@ struct vimc_ent_device *vimc_cap_create(struct v4l2_device *v4l2_dev,
vcap->format.height;
/* Fill the vimc_ent_device struct */
vcap->ved.destroy = vimc_cap_destroy;
vcap->ved.ent = &vcap->vdev.entity;
vcap->ved.process_frame = vimc_cap_process_frame;
vcap->ved.vdev_get_format = vimc_cap_get_format;
dev_set_drvdata(comp, &vcap->ved);
vcap->dev = comp;
/* Initialize the video_device struct */
vdev = &vcap->vdev;
@ -475,19 +475,18 @@ struct vimc_ent_device *vimc_cap_create(struct v4l2_device *v4l2_dev,
vdev->queue = q;
vdev->v4l2_dev = v4l2_dev;
vdev->vfl_dir = VFL_DIR_RX;
strlcpy(vdev->name, name, sizeof(vdev->name));
strlcpy(vdev->name, pdata->entity_name, sizeof(vdev->name));
video_set_drvdata(vdev, &vcap->ved);
/* Register the video_device with the v4l2 and the media framework */
ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
if (ret) {
dev_err(vcap->vdev.v4l2_dev->dev,
"%s: video register failed (err=%d)\n",
dev_err(comp, "%s: video register failed (err=%d)\n",
vcap->vdev.name, ret);
goto err_release_queue;
}
return &vcap->ved;
return 0;
err_release_queue:
vb2_queue_release(q);
@ -498,5 +497,45 @@ err_clean_pads:
err_free_vcap:
kfree(vcap);
return ERR_PTR(ret);
return ret;
}
static const struct component_ops vimc_cap_comp_ops = {
.bind = vimc_cap_comp_bind,
.unbind = vimc_cap_comp_unbind,
};
static int vimc_cap_probe(struct platform_device *pdev)
{
return component_add(&pdev->dev, &vimc_cap_comp_ops);
}
static int vimc_cap_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &vimc_cap_comp_ops);
return 0;
}
static struct platform_driver vimc_cap_pdrv = {
.probe = vimc_cap_probe,
.remove = vimc_cap_remove,
.driver = {
.name = VIMC_CAP_DRV_NAME,
},
};
static const struct platform_device_id vimc_cap_driver_ids[] = {
{
.name = VIMC_CAP_DRV_NAME,
},
{ }
};
module_platform_driver(vimc_cap_pdrv);
MODULE_DEVICE_TABLE(platform, vimc_cap_driver_ids);
MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Capture");
MODULE_AUTHOR("Helen Mae Koike Fornazier <helen.fornazier@gmail.com>");
MODULE_LICENSE("GPL");

28
drivers/media/platform/vimc/vimc-capture.h
View File

@ -1,28 +0,0 @@
/*
* vimc-capture.h Virtual Media Controller Driver
*
* Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
*/
#ifndef _VIMC_CAPTURE_H_
#define _VIMC_CAPTURE_H_
#include "vimc-common.h"
struct vimc_ent_device *vimc_cap_create(struct v4l2_device *v4l2_dev,
const char *const name,
u16 num_pads,
const unsigned long *pads_flag);
#endif

38
drivers/media/platform/vimc/vimc-common.c
View File

@ -15,6 +15,9 @@
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include "vimc-common.h"
static const struct vimc_pix_map vimc_pix_map_list[] = {
@ -151,6 +154,7 @@ const struct vimc_pix_map *vimc_pix_map_by_index(unsigned int i)
return &vimc_pix_map_list[i];
}
EXPORT_SYMBOL_GPL(vimc_pix_map_by_index);
const struct vimc_pix_map *vimc_pix_map_by_code(u32 code)
{
@ -162,6 +166,7 @@ const struct vimc_pix_map *vimc_pix_map_by_code(u32 code)
}
return NULL;
}
EXPORT_SYMBOL_GPL(vimc_pix_map_by_code);
const struct vimc_pix_map *vimc_pix_map_by_pixelformat(u32 pixelformat)
{
@ -173,6 +178,7 @@ const struct vimc_pix_map *vimc_pix_map_by_pixelformat(u32 pixelformat)
}
return NULL;
}
EXPORT_SYMBOL_GPL(vimc_pix_map_by_pixelformat);
int vimc_propagate_frame(struct media_pad *src, const void *frame)
{
@ -207,6 +213,7 @@ int vimc_propagate_frame(struct media_pad *src, const void *frame)
return 0;
}
EXPORT_SYMBOL_GPL(vimc_propagate_frame);
/* Helper function to allocate and initialize pads */
struct media_pad *vimc_pads_init(u16 num_pads, const unsigned long *pads_flag)
@ -227,6 +234,7 @@ struct media_pad *vimc_pads_init(u16 num_pads, const unsigned long *pads_flag)
return pads;
}
EXPORT_SYMBOL_GPL(vimc_pads_init);
int vimc_pipeline_s_stream(struct media_entity *ent, int enable)
{
@ -242,14 +250,8 @@ int vimc_pipeline_s_stream(struct media_entity *ent, int enable)
/* Start the stream in the subdevice direct connected */
pad = media_entity_remote_pad(&ent->pads[i]);
/*
* if this is a raw node from vimc-core, then there is
* nothing to activate
* TODO: remove this when there are no more raw nodes in the
* core and return error instead
*/
if (pad->entity->obj_type == MEDIA_ENTITY_TYPE_BASE)
continue;
if (!is_media_entity_v4l2_subdev(pad->entity))
return -EINVAL;
sd = media_entity_to_v4l2_subdev(pad->entity);
ret = v4l2_subdev_call(sd, video, s_stream, enable);
@ -259,6 +261,7 @@ int vimc_pipeline_s_stream(struct media_entity *ent, int enable)
return 0;
}
EXPORT_SYMBOL_GPL(vimc_pipeline_s_stream);
static int vimc_get_mbus_format(struct media_pad *pad,
struct v4l2_subdev_format *fmt)
@ -301,14 +304,6 @@ int vimc_link_validate(struct media_link *link)
struct v4l2_subdev_format source_fmt, sink_fmt;
int ret;
/*
* if it is a raw node from vimc-core, ignore the link for now
* TODO: remove this when there are no more raw nodes in the
* core and return error instead
*/
if (link->source->entity->obj_type == MEDIA_ENTITY_TYPE_BASE)
return 0;
ret = vimc_get_mbus_format(link->source, &source_fmt);
if (ret)
return ret;
@ -378,6 +373,7 @@ int vimc_link_validate(struct media_link *link)
return 0;
}
EXPORT_SYMBOL_GPL(vimc_link_validate);
static const struct media_entity_operations vimc_ent_sd_mops = {
.link_validate = vimc_link_validate,
@ -390,8 +386,7 @@ int vimc_ent_sd_register(struct vimc_ent_device *ved,
u32 function,
u16 num_pads,
const unsigned long *pads_flag,
const struct v4l2_subdev_ops *sd_ops,
void (*sd_destroy)(struct vimc_ent_device *))
const struct v4l2_subdev_ops *sd_ops)
{
int ret;
@ -401,7 +396,6 @@ int vimc_ent_sd_register(struct vimc_ent_device *ved,
return PTR_ERR(ved->pads);
/* Fill the vimc_ent_device struct */
ved->destroy = sd_destroy;
ved->ent = &sd->entity;
/* Initialize the subdev */
@ -437,6 +431,7 @@ err_clean_pads:
vimc_pads_cleanup(ved->pads);
return ret;
}
EXPORT_SYMBOL_GPL(vimc_ent_sd_register);
void vimc_ent_sd_unregister(struct vimc_ent_device *ved, struct v4l2_subdev *sd)
{
@ -444,3 +439,8 @@ void vimc_ent_sd_unregister(struct vimc_ent_device *ved, struct v4l2_subdev *sd)
media_entity_cleanup(ved->ent);
vimc_pads_cleanup(ved->pads);
}
EXPORT_SYMBOL_GPL(vimc_ent_sd_unregister);
MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Common");
MODULE_AUTHOR("Helen Koike <helen.fornazier@gmail.com>");
MODULE_LICENSE("GPL");

29
drivers/media/platform/vimc/vimc-common.h
View File

@ -1,5 +1,5 @@
/*
* vimc-ccommon.h Virtual Media Controller Driver
* vimc-common.h Virtual Media Controller Driver
*
* Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
*
@ -53,6 +53,21 @@ do { \
(fmt)->xfer_func = V4L2_XFER_FUNC_DEFAULT; \
} while (0)
/**
* struct vimc_platform_data - platform data to components
*
* @entity_name: The name of the entity to be created
*
* Board setup code will often provide additional information using the device's
* platform_data field to hold additional information.
* When injecting a new platform_device in the component system the core needs
* to provide to the corresponding submodules the name of the entity that should
* be used when registering the subdevice in the Media Controller system.
*/
struct vimc_platform_data {
char entity_name[32];
};
/**
* struct vimc_pix_map - maps media bus code with v4l2 pixel format
*
@ -74,7 +89,6 @@ struct vimc_pix_map {
*
* @ent: the pointer to struct media_entity for the node
* @pads: the list of pads of the node
* @destroy: callback to destroy the node
* @process_frame: callback send a frame to that node
* @vdev_get_format: callback that returns the current format a pad, used
* only when is_media_entity_v4l2_video_device(ent) returns
@ -91,7 +105,6 @@ struct vimc_pix_map {
struct vimc_ent_device {
struct media_entity *ent;
struct media_pad *pads;
void (*destroy)(struct vimc_ent_device *);
void (*process_frame)(struct vimc_ent_device *ved,
struct media_pad *sink, const void *frame);
void (*vdev_get_format)(struct vimc_ent_device *ved,
@ -176,7 +189,6 @@ const struct vimc_pix_map *vimc_pix_map_by_pixelformat(u32 pixelformat);
* @num_pads: number of pads to initialize
* @pads_flag: flags to use in each pad
* @sd_ops: pointer to &struct v4l2_subdev_ops.
* @sd_destroy: callback to destroy the node
*
* Helper function initialize and register the struct vimc_ent_device and struct
* v4l2_subdev which represents a subdev node in the topology
@ -188,14 +200,13 @@ int vimc_ent_sd_register(struct vimc_ent_device *ved,
u32 function,
u16 num_pads,
const unsigned long *pads_flag,
const struct v4l2_subdev_ops *sd_ops,
void (*sd_destroy)(struct vimc_ent_device *));
const struct v4l2_subdev_ops *sd_ops);
/**
* vimc_ent_sd_register - initialize and register a subdev node
* vimc_ent_sd_unregister - cleanup and unregister a subdev node
*
* @ved: the vimc_ent_device struct to be initialize
* @sd: the v4l2_subdev struct to be initialize and registered
* @ved: the vimc_ent_device struct to be cleaned up
* @sd: the v4l2_subdev struct to be unregistered
*
* Helper function cleanup and unregister the struct vimc_ent_device and struct
* v4l2_subdev which represents a subdev node in the topology

417
drivers/media/platform/vimc/vimc-core.c
View File

@ -15,15 +15,14 @@
*
*/
#include <linux/component.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <media/media-device.h>
#include <media/v4l2-device.h>
#include "vimc-capture.h"
#include "vimc-common.h"
#include "vimc-sensor.h"
#define VIMC_PDEV_NAME "vimc"
#define VIMC_MDEV_MODEL_NAME "VIMC MDEV"
@ -37,10 +36,10 @@
}
struct vimc_device {
/*
* The pipeline configuration
* (filled before calling vimc_device_register)
*/
/* The platform device */
struct platform_device pdev;
/* The pipeline configuration */
const struct vimc_pipeline_config *pipe_cfg;
/* The Associated media_device parent */
@ -49,43 +48,14 @@ struct vimc_device {
/* Internal v4l2 parent device*/
struct v4l2_device v4l2_dev;
/* Internal topology */
struct vimc_ent_device **ved;
};
/**
* enum vimc_ent_node - Select the functionality of a node in the topology
* @VIMC_ENT_NODE_SENSOR: A node of type SENSOR simulates a camera sensor
* generating internal images in bayer format and
* propagating those images through the pipeline
* @VIMC_ENT_NODE_CAPTURE: A node of type CAPTURE is a v4l2 video_device
* that exposes the received image from the
* pipeline to the user space
* @VIMC_ENT_NODE_INPUT: A node of type INPUT is a v4l2 video_device that
* receives images from the user space and
* propagates them through the pipeline
* @VIMC_ENT_NODE_DEBAYER: A node type DEBAYER expects to receive a frame
* in bayer format converts it to RGB
* @VIMC_ENT_NODE_SCALER: A node of type SCALER scales the received image
* by a given multiplier
*
* This enum is used in the entity configuration struct to allow the definition
* of a custom topology specifying the role of each node on it.
*/
enum vimc_ent_node {
VIMC_ENT_NODE_SENSOR,
VIMC_ENT_NODE_CAPTURE,
VIMC_ENT_NODE_INPUT,
VIMC_ENT_NODE_DEBAYER,
VIMC_ENT_NODE_SCALER,
/* Subdevices */
struct platform_device **subdevs;
};
/* Structure which describes individual configuration for each entity */
struct vimc_ent_config {
const char *name;
size_t pads_qty;
const unsigned long *pads_flag;
enum vimc_ent_node node;
const char *drv;
};
/* Structure which describes links between entities */
@ -112,60 +82,40 @@ struct vimc_pipeline_config {
static const struct vimc_ent_config ent_config[] = {
{
.name = "Sensor A",
.pads_qty = 1,
.pads_flag = (const unsigned long[]){MEDIA_PAD_FL_SOURCE},
.node = VIMC_ENT_NODE_SENSOR,
.drv = "vimc-sensor",
},
{
.name = "Sensor B",
.pads_qty = 1,
.pads_flag = (const unsigned long[]){MEDIA_PAD_FL_SOURCE},
.node = VIMC_ENT_NODE_SENSOR,
.drv = "vimc-sensor",
},
{
.name = "Debayer A",
.pads_qty = 2,
.pads_flag = (const unsigned long[]){MEDIA_PAD_FL_SINK,
MEDIA_PAD_FL_SOURCE},
.node = VIMC_ENT_NODE_DEBAYER,
.drv = "vimc-debayer",
},
{
.name = "Debayer B",
.pads_qty = 2,
.pads_flag = (const unsigned long[]){MEDIA_PAD_FL_SINK,
MEDIA_PAD_FL_SOURCE},
.node = VIMC_ENT_NODE_DEBAYER,
.drv = "vimc-debayer",
},
{
.name = "Raw Capture 0",
.pads_qty = 1,
.pads_flag = (const unsigned long[]){MEDIA_PAD_FL_SINK},
.node = VIMC_ENT_NODE_CAPTURE,
.drv = "vimc-capture",
},
{
.name = "Raw Capture 1",
.pads_qty = 1,
.pads_flag = (const unsigned long[]){MEDIA_PAD_FL_SINK},
.node = VIMC_ENT_NODE_CAPTURE,
.drv = "vimc-capture",
},
{
.name = "RGB/YUV Input",
.pads_qty = 1,
.pads_flag = (const unsigned long[]){MEDIA_PAD_FL_SOURCE},
.node = VIMC_ENT_NODE_INPUT,
/* TODO: change this to vimc-input when it is implemented */
.drv = "vimc-sensor",
},
{
.name = "Scaler",
.pads_qty = 2,
.pads_flag = (const unsigned long[]){MEDIA_PAD_FL_SINK,
MEDIA_PAD_FL_SOURCE},
.node = VIMC_ENT_NODE_SCALER,
.drv = "vimc-scaler",
},
{
.name = "RGB/YUV Capture",
.pads_qty = 1,
.pads_flag = (const unsigned long[]){MEDIA_PAD_FL_SINK},
.node = VIMC_ENT_NODE_CAPTURE,
.drv = "vimc-capture",
},
};
@ -197,111 +147,40 @@ static const struct vimc_pipeline_config pipe_cfg = {
/* -------------------------------------------------------------------------- */
static void vimc_device_unregister(struct vimc_device *vimc)
{
unsigned int i;
media_device_unregister(&vimc->mdev);
/* Cleanup (only initialized) entities */
for (i = 0; i < vimc->pipe_cfg->num_ents; i++) {
if (vimc->ved[i] && vimc->ved[i]->destroy)
vimc->ved[i]->destroy(vimc->ved[i]);
vimc->ved[i] = NULL;
}
v4l2_device_unregister(&vimc->v4l2_dev);
media_device_cleanup(&vimc->mdev);
}
/*
* TODO: remove this function when all the
* entities specific code are implemented
*/
static void vimc_raw_destroy(struct vimc_ent_device *ved)
{
media_device_unregister_entity(ved->ent);
media_entity_cleanup(ved->ent);
vimc_pads_cleanup(ved->pads);
kfree(ved->ent);
kfree(ved);
}
/*
* TODO: remove this function when all the
* entities specific code are implemented
*/
static struct vimc_ent_device *vimc_raw_create(struct v4l2_device *v4l2_dev,
const char *const name,
u16 num_pads,
const unsigned long *pads_flag)
{
struct vimc_ent_device *ved;
int ret;
/* Allocate the main ved struct */
ved = kzalloc(sizeof(*ved), GFP_KERNEL);
if (!ved)
return ERR_PTR(-ENOMEM);
/* Allocate the media entity */
ved->ent = kzalloc(sizeof(*ved->ent), GFP_KERNEL);
if (!ved->ent) {
ret = -ENOMEM;
goto err_free_ved;
}
/* Allocate the pads */
ved->pads = vimc_pads_init(num_pads, pads_flag);
if (IS_ERR(ved->pads)) {
ret = PTR_ERR(ved->pads);
goto err_free_ent;
}
/* Initialize the media entity */
ved->ent->name = name;
ved->ent->function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
ret = media_entity_pads_init(ved->ent, num_pads, ved->pads);
if (ret)
goto err_cleanup_pads;
/* Register the media entity */
ret = media_device_register_entity(v4l2_dev->mdev, ved->ent);
if (ret)
goto err_cleanup_entity;
/* Fill out the destroy function and return */
ved->destroy = vimc_raw_destroy;
return ved;
err_cleanup_entity:
media_entity_cleanup(ved->ent);
err_cleanup_pads:
vimc_pads_cleanup(ved->pads);
err_free_ent:
kfree(ved->ent);
err_free_ved:
kfree(ved);
return ERR_PTR(ret);
}
static int vimc_device_register(struct vimc_device *vimc)
static int vimc_create_links(struct vimc_device *vimc)
{
unsigned int i;
int ret;
/* Allocate memory for the vimc_ent_devices pointers */
vimc->ved = devm_kcalloc(vimc->mdev.dev, vimc->pipe_cfg->num_ents,
sizeof(*vimc->ved), GFP_KERNEL);
if (!vimc->ved)
return -ENOMEM;
/* Initialize the links between entities */
for (i = 0; i < vimc->pipe_cfg->num_links; i++) {
const struct vimc_ent_link *link = &vimc->pipe_cfg->links[i];
/*
* TODO: Check another way of retrieving ved struct without
* relying on platform_get_drvdata
*/
struct vimc_ent_device *ved_src =
platform_get_drvdata(vimc->subdevs[link->src_ent]);
struct vimc_ent_device *ved_sink =
platform_get_drvdata(vimc->subdevs[link->sink_ent]);
/* Link the media device within the v4l2_device */
vimc->v4l2_dev.mdev = &vimc->mdev;
ret = media_create_pad_link(ved_src->ent, link->src_pad,
ved_sink->ent, link->sink_pad,
link->flags);
if (ret)
return ret;
}
return 0;
}
static int vimc_comp_bind(struct device *master)
{
struct vimc_device *vimc = container_of(to_platform_device(master),
struct vimc_device, pdev);
int ret;
dev_dbg(master, "bind");
/* Register the v4l2 struct */
ret = v4l2_device_register(vimc->mdev.dev, &vimc->v4l2_dev);
@ -311,66 +190,22 @@ static int vimc_device_register(struct vimc_device *vimc)
return ret;
}
/* Initialize entities */
for (i = 0; i < vimc->pipe_cfg->num_ents; i++) {
struct vimc_ent_device *(*create_func)(struct v4l2_device *,
const char *const,
u16,
const unsigned long *);
/* Bind subdevices */
ret = component_bind_all(master, &vimc->v4l2_dev);
if (ret)
goto err_v4l2_unregister;
/* Register the specific node */
switch (vimc->pipe_cfg->ents[i].node) {
case VIMC_ENT_NODE_SENSOR:
create_func = vimc_sen_create;
break;
case VIMC_ENT_NODE_CAPTURE:
create_func = vimc_cap_create;
break;
/* TODO: Instantiate the specific topology node */
case VIMC_ENT_NODE_INPUT:
case VIMC_ENT_NODE_DEBAYER:
case VIMC_ENT_NODE_SCALER:
default:
/*
* TODO: remove this when all the entities specific
* code are implemented
*/
create_func = vimc_raw_create;
break;
}
vimc->ved[i] = create_func(&vimc->v4l2_dev,
vimc->pipe_cfg->ents[i].name,
vimc->pipe_cfg->ents[i].pads_qty,
vimc->pipe_cfg->ents[i].pads_flag);
if (IS_ERR(vimc->ved[i])) {
ret = PTR_ERR(vimc->ved[i]);
vimc->ved[i] = NULL;
goto err;
}
}
/* Initialize the links between entities */
for (i = 0; i < vimc->pipe_cfg->num_links; i++) {
const struct vimc_ent_link *link = &vimc->pipe_cfg->links[i];
ret = media_create_pad_link(vimc->ved[link->src_ent]->ent,
link->src_pad,
vimc->ved[link->sink_ent]->ent,
link->sink_pad,
link->flags);
if (ret)
goto err;
}
/* Initialize links */
ret = vimc_create_links(vimc);
if (ret)
goto err_comp_unbind_all;
/* Register the media device */
ret = media_device_register(&vimc->mdev);
if (ret) {
dev_err(vimc->mdev.dev,
"media device register failed (err=%d)\n", ret);
return ret;
goto err_comp_unbind_all;
}
/* Expose all subdev's nodes*/
@ -379,32 +214,106 @@ static int vimc_device_register(struct vimc_device *vimc)
dev_err(vimc->mdev.dev,
"vimc subdev nodes registration failed (err=%d)\n",
ret);
goto err;
goto err_mdev_unregister;
}
return 0;
err:
/* Destroy the so far created topology */
vimc_device_unregister(vimc);
err_mdev_unregister:
media_device_unregister(&vimc->mdev);
err_comp_unbind_all:
component_unbind_all(master, NULL);
err_v4l2_unregister:
v4l2_device_unregister(&vimc->v4l2_dev);
return ret;
}
static void vimc_comp_unbind(struct device *master)
{
struct vimc_device *vimc = container_of(to_platform_device(master),
struct vimc_device, pdev);
dev_dbg(master, "unbind");
media_device_unregister(&vimc->mdev);
component_unbind_all(master, NULL);
v4l2_device_unregister(&vimc->v4l2_dev);
}
static int vimc_comp_compare(struct device *comp, void *data)
{
const struct platform_device *pdev = to_platform_device(comp);
const char *name = data;
return !strcmp(pdev->dev.platform_data, name);
}
static struct component_match *vimc_add_subdevs(struct vimc_device *vimc)
{
struct component_match *match = NULL;
struct vimc_platform_data pdata;
int i;
for (i = 0; i < vimc->pipe_cfg->num_ents; i++) {
dev_dbg(&vimc->pdev.dev, "new pdev for %s\n",
vimc->pipe_cfg->ents[i].drv);
strlcpy(pdata.entity_name, vimc->pipe_cfg->ents[i].name,
sizeof(pdata.entity_name));
vimc->subdevs[i] = platform_device_register_data(&vimc->pdev.dev,
vimc->pipe_cfg->ents[i].drv,
PLATFORM_DEVID_AUTO,
&pdata,
sizeof(pdata));
if (!vimc->subdevs[i]) {
while (--i >= 0)
platform_device_unregister(vimc->subdevs[i]);
return ERR_PTR(-ENOMEM);
}
component_match_add(&vimc->pdev.dev, &match, vimc_comp_compare,
(void *)vimc->pipe_cfg->ents[i].name);
}
return match;
}
static void vimc_rm_subdevs(struct vimc_device *vimc)
{
unsigned int i;
for (i = 0; i < vimc->pipe_cfg->num_ents; i++)
platform_device_unregister(vimc->subdevs[i]);
}
static const struct component_master_ops vimc_comp_ops = {
.bind = vimc_comp_bind,
.unbind = vimc_comp_unbind,
};
static int vimc_probe(struct platform_device *pdev)
{
struct vimc_device *vimc;
struct vimc_device *vimc = container_of(pdev, struct vimc_device, pdev);
struct component_match *match = NULL;
int ret;
/* Prepare the vimc topology structure */
dev_dbg(&pdev->dev, "probe");
/* Allocate memory for the vimc structure */
vimc = kzalloc(sizeof(*vimc), GFP_KERNEL);
if (!vimc)
/* Create platform_device for each entity in the topology*/
vimc->subdevs = devm_kcalloc(&vimc->pdev.dev, vimc->pipe_cfg->num_ents,
sizeof(*vimc->subdevs), GFP_KERNEL);
if (!vimc->subdevs)
return -ENOMEM;
/* Set the pipeline configuration struct */
vimc->pipe_cfg = &pipe_cfg;
match = vimc_add_subdevs(vimc);
if (IS_ERR(match))
return PTR_ERR(match);
/* Link the media device within the v4l2_device */
vimc->v4l2_dev.mdev = &vimc->mdev;
/* Initialize media device */
strlcpy(vimc->mdev.model, VIMC_MDEV_MODEL_NAME,
@ -412,28 +321,27 @@ static int vimc_probe(struct platform_device *pdev)
vimc->mdev.dev = &pdev->dev;
media_device_init(&vimc->mdev);
/* Create vimc topology */
ret = vimc_device_register(vimc);
/* Add self to the component system */
ret = component_master_add_with_match(&pdev->dev, &vimc_comp_ops,
match);
if (ret) {
dev_err(vimc->mdev.dev,
"vimc device registration failed (err=%d)\n", ret);
media_device_cleanup(&vimc->mdev);
vimc_rm_subdevs(vimc);
kfree(vimc);
return ret;
}
/* Link the topology object with the platform device object */
platform_set_drvdata(pdev, vimc);
return 0;
}
static int vimc_remove(struct platform_device *pdev)
{
struct vimc_device *vimc = platform_get_drvdata(pdev);
struct vimc_device *vimc = container_of(pdev, struct vimc_device, pdev);
/* Destroy all the topology */
vimc_device_unregister(vimc);
kfree(vimc);
dev_dbg(&pdev->dev, "remove");
component_master_del(&pdev->dev, &vimc_comp_ops);
vimc_rm_subdevs(vimc);
return 0;
}
@ -442,9 +350,12 @@ static void vimc_dev_release(struct device *dev)
{
}
static struct platform_device vimc_pdev = {
.name = VIMC_PDEV_NAME,
.dev.release = vimc_dev_release,
static struct vimc_device vimc_dev = {
.pipe_cfg = &pipe_cfg,
.pdev = {
.name = VIMC_PDEV_NAME,
.dev.release = vimc_dev_release,
}
};
static struct platform_driver vimc_pdrv = {
@ -459,29 +370,29 @@ static int __init vimc_init(void)
{
int ret;
ret = platform_device_register(&vimc_pdev);
ret = platform_device_register(&vimc_dev.pdev);
if (ret) {
dev_err(&vimc_pdev.dev,
dev_err(&vimc_dev.pdev.dev,
"platform device registration failed (err=%d)\n", ret);
return ret;
}
ret = platform_driver_register(&vimc_pdrv);
if (ret) {
dev_err(&vimc_pdev.dev,
dev_err(&vimc_dev.pdev.dev,
"platform driver registration failed (err=%d)\n", ret);
platform_device_unregister(&vimc_pdev);
platform_driver_unregister(&vimc_pdrv);
return ret;
}
return ret;
return 0;
}
static void __exit vimc_exit(void)
{
platform_driver_unregister(&vimc_pdrv);
platform_device_unregister(&vimc_pdev);
platform_device_unregister(&vimc_dev.pdev);
}
module_init(vimc_init);

93
drivers/media/platform/vimc/vimc-sensor.c
View File

@ -15,18 +15,24 @@
*
*/
#include <linux/component.h>
#include <linux/freezer.h>
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/v4l2-mediabus.h>
#include <linux/vmalloc.h>
#include <media/v4l2-subdev.h>
#include <media/v4l2-tpg.h>
#include "vimc-sensor.h"
#include "vimc-common.h"
#define VIMC_SEN_DRV_NAME "vimc-sensor"
struct vimc_sen_device {
struct vimc_ent_device ved;
struct v4l2_subdev sd;
struct device *dev;
struct tpg_data tpg;
struct task_struct *kthread_sen;
u8 *frame;
@ -166,7 +172,7 @@ static int vimc_sen_set_fmt(struct v4l2_subdev *sd,
/* Set the new format */
vimc_sen_adjust_fmt(&fmt->format);
dev_dbg(vsen->sd.v4l2_dev->mdev->dev, "%s: format update: "
dev_dbg(vsen->dev, "%s: format update: "
"old:%dx%d (0x%x, %d, %d, %d, %d) "
"new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsen->sd.name,
/* old */
@ -252,8 +258,8 @@ static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable)
vsen->kthread_sen = kthread_run(vimc_sen_tpg_thread, vsen,
"%s-sen", vsen->sd.v4l2_dev->name);
if (IS_ERR(vsen->kthread_sen)) {
dev_err(vsen->sd.v4l2_dev->dev,
"%s: kernel_thread() failed\n", vsen->sd.name);
dev_err(vsen->dev, "%s: kernel_thread() failed\n",
vsen->sd.name);
vfree(vsen->frame);
vsen->frame = NULL;
return PTR_ERR(vsen->kthread_sen);
@ -285,8 +291,10 @@ static const struct v4l2_subdev_ops vimc_sen_ops = {
.video = &vimc_sen_video_ops,
};
static void vimc_sen_destroy(struct vimc_ent_device *ved)
static void vimc_sen_comp_unbind(struct device *comp, struct device *master,
void *master_data)
{
struct vimc_ent_device *ved = dev_get_drvdata(comp);
struct vimc_sen_device *vsen =
container_of(ved, struct vimc_sen_device, ved);
@ -295,36 +303,31 @@ static void vimc_sen_destroy(struct vimc_ent_device *ved)
kfree(vsen);
}
struct vimc_ent_device *vimc_sen_create(struct v4l2_device *v4l2_dev,
const char *const name,
u16 num_pads,
const unsigned long *pads_flag)
static int vimc_sen_comp_bind(struct device *comp, struct device *master,
void *master_data)
{
struct v4l2_device *v4l2_dev = master_data;
struct vimc_platform_data *pdata = comp->platform_data;
struct vimc_sen_device *vsen;
unsigned int i;
int ret;
/* NOTE: a sensor node may be created with more then one pad */
if (!name || !num_pads || !pads_flag)
return ERR_PTR(-EINVAL);
/* check if all pads are sources */
for (i = 0; i < num_pads; i++)
if (!(pads_flag[i] & MEDIA_PAD_FL_SOURCE))
return ERR_PTR(-EINVAL);
/* Allocate the vsen struct */
vsen = kzalloc(sizeof(*vsen), GFP_KERNEL);
if (!vsen)
return ERR_PTR(-ENOMEM);
return -ENOMEM;
/* Initialize ved and sd */
ret = vimc_ent_sd_register(&vsen->ved, &vsen->sd, v4l2_dev, name,
MEDIA_ENT_F_CAM_SENSOR, num_pads, pads_flag,
&vimc_sen_ops, vimc_sen_destroy);
ret = vimc_ent_sd_register(&vsen->ved, &vsen->sd, v4l2_dev,
pdata->entity_name,
MEDIA_ENT_F_ATV_DECODER, 1,
(const unsigned long[1]) {MEDIA_PAD_FL_SOURCE},
&vimc_sen_ops);
if (ret)
goto err_free_vsen;
dev_set_drvdata(comp, &vsen->ved);
vsen->dev = comp;
/* Initialize the frame format */
vsen->mbus_format = fmt_default;
@ -335,12 +338,52 @@ struct vimc_ent_device *vimc_sen_create(struct v4l2_device *v4l2_dev,
if (ret)
goto err_unregister_ent_sd;
return &vsen->ved;
return 0;
err_unregister_ent_sd:
vimc_ent_sd_unregister(&vsen->ved, &vsen->sd);
err_free_vsen:
kfree(vsen);
return ERR_PTR(ret);
return ret;
}
static const struct component_ops vimc_sen_comp_ops = {
.bind = vimc_sen_comp_bind,
.unbind = vimc_sen_comp_unbind,
};
static int vimc_sen_probe(struct platform_device *pdev)
{
return component_add(&pdev->dev, &vimc_sen_comp_ops);
}
static int vimc_sen_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &vimc_sen_comp_ops);
return 0;
}
static struct platform_driver vimc_sen_pdrv = {
.probe = vimc_sen_probe,
.remove = vimc_sen_remove,
.driver = {
.name = VIMC_SEN_DRV_NAME,
},
};
static const struct platform_device_id vimc_sen_driver_ids[] = {
{
.name = VIMC_SEN_DRV_NAME,
},
{ }
};
module_platform_driver(vimc_sen_pdrv);
MODULE_DEVICE_TABLE(platform, vimc_sen_driver_ids);
MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Sensor");
MODULE_AUTHOR("Helen Mae Koike Fornazier <helen.fornazier@gmail.com>");
MODULE_LICENSE("GPL");

28
drivers/media/platform/vimc/vimc-sensor.h
View File

@ -1,28 +0,0 @@
/*
* vimc-sensor.h Virtual Media Controller Driver
*
* Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
*/
#ifndef _VIMC_SENSOR_H_
#define _VIMC_SENSOR_H_
#include "vimc-common.h"
struct vimc_ent_device *vimc_sen_create(struct v4l2_device *v4l2_dev,
const char *const name,
u16 num_pads,
const unsigned long *pads_flag);
#endif