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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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40
drivers/cam_cdm/cam_cdm_intf.c
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@@ -16,6 +16,7 @@
#include "cam_soc_util.h"
#include "cam_cdm_soc.h"
#include "cam_cdm_core_common.h"
#include "camera_main.h"
static struct cam_cdm_intf_mgr cdm_mgr;
static DEFINE_MUTEX(cam_cdm_mgr_lock);
@@ -563,9 +564,11 @@ int cam_cdm_intf_deregister_hw_cdm(struct cam_hw_intf *hw,
return rc;
}
static int cam_cdm_intf_probe(struct platform_device *pdev)
static int cam_cdm_intf_component_bind(struct device *dev,
struct device *master_dev, void *data)
{
int i, rc;
struct platform_device *pdev = to_platform_device(dev);
rc = cam_cdm_intf_mgr_soc_get_dt_properties(pdev, &cdm_mgr);
if (rc) {
@@ -599,18 +602,20 @@ static int cam_cdm_intf_probe(struct platform_device *pdev)
mutex_unlock(&cam_cdm_mgr_lock);
}
CAM_DBG(CAM_CDM, "CDM Intf probe done");
CAM_DBG(CAM_CDM, "CDM Intf component bound successfully");
return rc;
}
static int cam_cdm_intf_remove(struct platform_device *pdev)
static void cam_cdm_intf_component_unbind(struct device *dev,
struct device *master_dev, void *data)
{
int i, rc = -EBUSY;
int i;
struct platform_device *pdev = to_platform_device(dev);
if (get_cdm_mgr_refcount()) {
CAM_ERR(CAM_CDM, "CDM intf mgr get refcount failed");
return rc;
return;
}
if (cam_virtual_cdm_remove(pdev)) {
@@ -639,14 +644,35 @@ static int cam_cdm_intf_remove(struct platform_device *pdev)
cdm_mgr.nodes[i].refcount = 0;
}
cdm_mgr.probe_done = false;
rc = 0;
end:
mutex_unlock(&cam_cdm_mgr_lock);
}
const static struct component_ops cam_cdm_intf_component_ops = {
.bind = cam_cdm_intf_component_bind,
.unbind = cam_cdm_intf_component_unbind,
};
static int cam_cdm_intf_probe(struct platform_device *pdev)
{
int rc = 0;
CAM_DBG(CAM_CDM, "Adding CDM INTF component");
rc = component_add(&pdev->dev, &cam_cdm_intf_component_ops);
if (rc)
CAM_ERR(CAM_CDM, "failed to add component rc: %d", rc);
return rc;
}
static struct platform_driver cam_cdm_intf_driver = {
static int cam_cdm_intf_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &cam_cdm_intf_component_ops);
return 0;
}
struct platform_driver cam_cdm_intf_driver = {
.probe = cam_cdm_intf_probe,
.remove = cam_cdm_intf_remove,
.driver = {