[RFC PATCH v3 09/11] [media] vimc: Subdevices as modules

Helen Koike
2017-06-03T03:01:33Z

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>

---

Changes in v3:
[media] vimc: Subdevices as modules
- This is a new patch in the series

Changes in v2: None

---
drivers/media/platform/vimc/Makefile | 7 +-
drivers/media/platform/vimc/vimc-capture.c | 96 ++++---
drivers/media/platform/vimc/vimc-capture.h | 28 --
drivers/media/platform/vimc/vimc-common.c | 37 ++-
drivers/media/platform/vimc/vimc-common.h | 14 +-
drivers/media/platform/vimc/vimc-core.c | 406 +++++++++++------------------
drivers/media/platform/vimc/vimc-sensor.c | 91 +++++--
drivers/media/platform/vimc/vimc-sensor.h | 28 --
8 files changed, 320 insertions(+), 387 deletions(-)
delete mode 100644 drivers/media/platform/vimc/vimc-capture.h
delete mode 100644 drivers/media/platform/vimc/vimc-sensor.h

diff --git a/drivers/media/platform/vimc/Makefile b/drivers/media/platform/vimc/Makefile
index 6b6ddf4..0e5d5ce 100644
--- a/drivers/media/platform/vimc/Makefile
+++ b/drivers/media/platform/vimc/Makefile
@@ -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
diff --git a/drivers/media/platform/vimc/vimc-capture.c b/drivers/media/platform/vimc/vimc-capture.c
index b5da0ea..633d99a 100644
--- a/drivers/media/platform/vimc/vimc-capture.c
+++ b/drivers/media/platform/vimc/vimc-capture.c
@@ -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 <media/v4l2-ioctl.h>
#include <media/v4l2-tpg.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;
@@ -150,7 +156,7 @@ 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 */
@@ -365,8 +371,7 @@ static int vimc_cap_start_streaming(struct vb2_queue *vq, unsigned int count)
vcap->kthread_cap = kthread_run(vimc_cap_tpg_thread, vcap,
"%s-cap", vcap->vdev.v4l2_dev->name);
if (IS_ERR(vcap->kthread_cap)) {
- dev_err(vcap->vdev.v4l2_dev->dev,
- "%s: kernel_thread() failed\n",
+ dev_err(vcap->dev, "%s: kernel_thread() failed\n",
vcap->vdev.name);
ret = PTR_ERR(vcap->kthread_cap);
goto err_tpg_free;
@@ -443,8 +448,7 @@ 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;
}
@@ -469,8 +473,10 @@ 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);

@@ -481,32 +487,25 @@ static void vimc_cap_destroy(struct vimc_ent_device *ved)
kfree(vcap);
}

-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;
+ char *name = 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;
@@ -516,7 +515,7 @@ struct vimc_ent_device *vimc_cap_create(struct v4l2_device *v4l2_dev,
vcap->vdev.entity.name = 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;

@@ -537,8 +536,7 @@ 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",
+ dev_err(comp, "%s: vb2 queue init failed (err=%d)\n",
vcap->vdev.name, ret);
goto err_clean_m_ent;
}
@@ -555,10 +553,11 @@ 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;
@@ -577,13 +576,12 @@ struct vimc_ent_device *vimc_cap_create(struct v4l2_device *v4l2_dev,
/* 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);
@@ -594,5 +592,45 @@ struct vimc_ent_device *vimc_cap_create(struct v4l2_device *v4l2_dev,
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");
diff --git a/drivers/media/platform/vimc/vimc-capture.h b/drivers/media/platform/vimc/vimc-capture.h
deleted file mode 100644
index 7e5c707..0000000
--- a/drivers/media/platform/vimc/vimc-capture.h
+++ /dev/null
@@ -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
diff --git a/drivers/media/platform/vimc/vimc-common.c b/drivers/media/platform/vimc/vimc-common.c
index ff59e09..d5ed387 100644
--- a/drivers/media/platform/vimc/vimc-common.c
+++ b/drivers/media/platform/vimc/vimc-common.c
@@ -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(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(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(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(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(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(vimc_pipeline_s_stream);

static void vimc_fmt_pix_to_mbus(struct v4l2_mbus_framefmt *mfmt,
struct v4l2_pix_format *pfmt)
@@ -315,14 +318,6 @@ 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;
@@ -393,8 +388,7 @@ 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;

@@ -404,7 +398,6 @@ 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 */
@@ -440,6 +433,7 @@ int vimc_ent_sd_register(struct vimc_ent_device *ved,
vimc_pads_cleanup(ved->pads);
return ret;
}
+EXPORT_SYMBOL(vimc_ent_sd_register);

void vimc_ent_sd_unregister(struct vimc_ent_device *ved, struct v4l2_subdev *sd)
{
@@ -447,3 +441,8 @@ 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(vimc_ent_sd_unregister);
+
+MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Common");
+MODULE_AUTHOR("Helen Koike <helen.fornazier@gmail.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/platform/vimc/vimc-common.h b/drivers/media/platform/vimc/vimc-common.h
index 5b2691e..27c9b8c 100644
--- a/drivers/media/platform/vimc/vimc-common.h
+++ b/drivers/media/platform/vimc/vimc-common.h
@@ -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>
*
@@ -50,7 +50,6 @@ 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
@@ -67,7 +66,6 @@ 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,
@@ -152,7 +150,6 @@ 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
@@ -164,14 +161,13 @@ 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
diff --git a/drivers/media/platform/vimc/vimc-core.c b/drivers/media/platform/vimc/vimc-core.c
index afc79e2..6148c3e 100644
--- a/drivers/media/platform/vimc/vimc-core.c
+++ b/drivers/media/platform/vimc/vimc-core.c
@@ -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 to vimc-output when output 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)
+static int vimc_create_links(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 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]);
+
+ ret = media_create_pad_link(ved_src->ent, link->src_pad,
+ ved_sink->ent, link->sink_pad,
+ link->flags);
+ if (ret)
+ return ret;
}

- /* 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);
+ return 0;
}

-static int vimc_device_register(struct vimc_device *vimc)
+static int vimc_comp_bind(struct device *master)
{
- unsigned int i;
+ struct vimc_device *vimc = container_of(to_platform_device(master),
+ struct vimc_device, pdev);
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;
-
- /* Link the media device within the v4l2_device */
- vimc->v4l2_dev.mdev = &vimc->mdev;
+ 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 *);
-
- /* 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];
+ /* Bind subdevices */
+ ret = component_bind_all(master, &vimc->v4l2_dev);
+ if (ret)
+ goto err_v4l2_unregister;

- 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 +214,107 @@ 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;
+ unsigned 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);
+
+ /*
+ * TODO: check if using platform_data is indeed the best way to
+ * pass the name to the driver or if we should add the drv name
+ * in the platform_device_id table
+ */
+ vimc->subdevs[i] = platform_device_register_data(&vimc->pdev.dev,
+ vimc->pipe_cfg->ents[i].drv,
+ PLATFORM_DEVID_AUTO,
+ vimc->pipe_cfg->ents[i].name,
+ strlen(vimc->pipe_cfg->ents[i].name) + 1);
+ 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 +322,27 @@ 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 +351,12 @@ 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 +371,29 @@ 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);
diff --git a/drivers/media/platform/vimc/vimc-sensor.c b/drivers/media/platform/vimc/vimc-sensor.c
index df89ee7..7f16978 100644
--- a/drivers/media/platform/vimc/vimc-sensor.c
+++ b/drivers/media/platform/vimc/vimc-sensor.c
@@ -15,15 +15,19 @@
*
*/

-#include <linux/module.h>
+#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"

static bool vsen_tpg;
module_param(vsen_tpg, bool, 0000);
@@ -35,6 +39,7 @@ MODULE_PARM_DESC(vsen_tpg, " generate image from sensor node\n"
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;
@@ -189,7 +194,7 @@ 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 */
@@ -282,8 +287,8 @@ 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);
@@ -315,8 +320,10 @@ 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);

@@ -326,36 +333,30 @@ 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;
+ char *name = 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);
+ 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;

@@ -368,12 +369,52 @@ struct vimc_ent_device *vimc_sen_create(struct v4l2_device *v4l2_dev,
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");
diff --git a/drivers/media/platform/vimc/vimc-sensor.h b/drivers/media/platform/vimc/vimc-sensor.h
deleted file mode 100644
index 580dcec..0000000
--- a/drivers/media/platform/vimc/vimc-sensor.h
+++ /dev/null
@@ -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
--
2.7.4