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Subject[RFCv3 07/17] v4l2-ctrls: prepare internal structs for request API
Date
From: Hans Verkuil <hans.verkuil@cisco.com>

Add a refcount and is_request bool to struct v4l2_ctrl_handler:
this is used to refcount a handler that represents a request.

Add a p_req field to struct v4l2_ctrl_ref that will store the
request value.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Alexandre Courbot <acourbot@chromium.org>
---
drivers/media/v4l2-core/v4l2-ctrls.c | 1 +
include/media/v4l2-ctrls.h | 4 ++++
2 files changed, 5 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 2e58381444d1..1ff8fc59fff5 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -1761,6 +1761,7 @@ int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,
sizeof(hdl->buckets[0]),
GFP_KERNEL | __GFP_ZERO);
hdl->error = hdl->buckets ? 0 : -ENOMEM;
+ hdl->is_request = false;
return hdl->error;
}
EXPORT_SYMBOL(v4l2_ctrl_handler_init_class);
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index a4750a8090e3..22b6be78057f 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -18,6 +18,7 @@
#define _V4L2_CTRLS_H

#include <linux/list.h>
+#include <linux/kref.h>
#include <linux/mutex.h>
#include <linux/videodev2.h>

@@ -257,6 +258,7 @@ struct v4l2_ctrl_ref {
struct v4l2_ctrl_ref *next;
struct v4l2_ctrl *ctrl;
struct v4l2_ctrl_helper *helper;
+ union v4l2_ctrl_ptr p_req;
bool from_other_dev;
};

@@ -292,7 +294,9 @@ struct v4l2_ctrl_handler {
v4l2_ctrl_notify_fnc notify;
void *notify_priv;
u16 nr_of_buckets;
+ bool is_request;
int error;
+ struct kref ref;
};

/**
--
2.16.0.rc1.238.g530d649a79-goog
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