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msm: camera: common: Add component helper support in camera

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Due to the asynchronous nature of platform probes, inter
dependency between drivers needs to be taken care during
kernel boot up. Component helper provides the facility of
adding matching drivers in a list ordered in the way we want
to bind those drivers. The CRM driver acts as component master
to make sure all slave drivers are bound before it returns
from its own bind call. Add support for serializing platform
probes through component framework.

CRs-Fixed: 2584631
Change-Id: I345da1d2b9cccf6021ac6fc899143013b7714ec4
Signed-off-by: Mukund Madhusudan Atre <matre@codeaurora.org>
This commit is contained in:
Mukund Madhusudan Atre
2020-01-25 21:15:38 -08:00
parent 8d05aad1b0
commit 5cb000ee7f
44 changed files with 1826 additions and 615 deletions
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37
drivers/cam_lrme/cam_lrme_dev.c
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@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2017-2019, The Linux Foundation. All rights reserved.
* Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
*/
#include <linux/device.h>
@@ -14,6 +14,7 @@
#include "cam_lrme_context.h"
#include "cam_lrme_hw_mgr.h"
#include "cam_lrme_hw_mgr_intf.h"
#include "camera_main.h"
#define CAM_LRME_DEV_NAME "cam-lrme"
@@ -110,12 +111,14 @@ static const struct v4l2_subdev_internal_ops cam_lrme_subdev_internal_ops = {
.close = cam_lrme_dev_close,
};
static int cam_lrme_dev_probe(struct platform_device *pdev)
static int cam_lrme_component_bind(struct device *dev,
struct device *master_dev, void *data)
{
int rc;
int i;
struct cam_hw_mgr_intf hw_mgr_intf;
struct cam_node *node;
struct platform_device *pdev = to_platform_device(dev);
g_lrme_dev = kzalloc(sizeof(struct cam_lrme_dev), GFP_KERNEL);
if (!g_lrme_dev) {
@@ -157,7 +160,7 @@ static int cam_lrme_dev_probe(struct platform_device *pdev)
goto deinit_ctx;
}
CAM_DBG(CAM_LRME, "%s probe complete", g_lrme_dev->sd.name);
CAM_DBG(CAM_LRME, "Component bound successfully");
return 0;
@@ -175,7 +178,8 @@ free_mem:
return rc;
}
static int cam_lrme_dev_remove(struct platform_device *pdev)
static void cam_lrme_component_unbind(struct device *dev,
struct device *master_dev, void *data)
{
int i;
int rc = 0;
@@ -192,15 +196,36 @@ static int cam_lrme_dev_remove(struct platform_device *pdev)
rc = cam_subdev_remove(&g_lrme_dev->sd);
if (rc)
CAM_ERR(CAM_LRME, "Unregister failed");
CAM_ERR(CAM_LRME, "Unregister failed rc: %d", rc);
mutex_destroy(&g_lrme_dev->lock);
kfree(g_lrme_dev);
g_lrme_dev = NULL;
}
const static struct component_ops cam_lrme_component_ops = {
.bind = cam_lrme_component_bind,
.unbind = cam_lrme_component_unbind,
};
static int cam_lrme_dev_probe(struct platform_device *pdev)
{
int rc = 0;
CAM_DBG(CAM_LRME, "Adding LRME component");
rc = component_add(&pdev->dev, &cam_lrme_component_ops);
if (rc)
CAM_ERR(CAM_LRME, "failed to add component rc: %d", rc);
return rc;
}
static int cam_lrme_dev_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &cam_lrme_component_ops);
return 0;
}
static const struct of_device_id cam_lrme_dt_match[] = {
{
.compatible = "qcom,cam-lrme"
@@ -208,7 +233,7 @@ static const struct of_device_id cam_lrme_dt_match[] = {
{}
};
static struct platform_driver cam_lrme_driver = {
struct platform_driver cam_lrme_driver = {
.probe = cam_lrme_dev_probe,
.remove = cam_lrme_dev_remove,
.driver = {