mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-21 14:37:57 +00:00
8299d1f057
Rebased RPi foundation patches on linux 5.10.59, removed applied and reverted patches, wireless patches and defconfig patches. bcm2708: boot tested on RPi B+ v1.2 bcm2709: boot tested on RPi 4B v1.1 4G bcm2711: boot tested on RPi 4B v1.1 4G Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
95 lines
2.7 KiB
Diff
95 lines
2.7 KiB
Diff
From 739b9c6a80058d1aaeb66fdfe2910662f7f411ad Mon Sep 17 00:00:00 2001
|
|
From: Ezequiel Garcia <ezequiel@collabora.com>
|
|
Date: Sun, 21 Mar 2021 16:38:54 -0300
|
|
Subject: [PATCH] RFC: media: Add media_request_{pin,unpin} API
|
|
|
|
This is probably not the API we will want to add, but it
|
|
should show what semantics are needed by drivers.
|
|
|
|
The goal is to allow the OUTPUT (aka source) buffer and the
|
|
controls associated to a request to be released from the request,
|
|
and in particular return the OUTPUT buffer back to userspace,
|
|
without signalling the media request fd.
|
|
|
|
This is useful for devices that are able to pre-process
|
|
the OUTPUT buffer, therefore able to release it before
|
|
the decoding is finished. These drivers should signal
|
|
the media request fd only after the CAPTURE buffer is done.
|
|
|
|
Tested-by: John Cox <jc@kynesim.co.uk>
|
|
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
|
|
---
|
|
drivers/media/mc/mc-request.c | 35 +++++++++++++++++++++++++++++++++++
|
|
include/media/media-request.h | 12 ++++++++++++
|
|
2 files changed, 47 insertions(+)
|
|
|
|
--- a/drivers/media/mc/mc-request.c
|
|
+++ b/drivers/media/mc/mc-request.c
|
|
@@ -504,3 +504,38 @@ unlock:
|
|
media_request_put(req);
|
|
}
|
|
EXPORT_SYMBOL_GPL(media_request_object_complete);
|
|
+
|
|
+void media_request_pin(struct media_request *req)
|
|
+{
|
|
+ unsigned long flags;
|
|
+
|
|
+ spin_lock_irqsave(&req->lock, flags);
|
|
+ if (WARN_ON(req->state != MEDIA_REQUEST_STATE_QUEUED))
|
|
+ goto unlock;
|
|
+ req->num_incomplete_objects++;
|
|
+unlock:
|
|
+ spin_unlock_irqrestore(&req->lock, flags);
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(media_request_pin);
|
|
+
|
|
+void media_request_unpin(struct media_request *req)
|
|
+{
|
|
+ unsigned long flags;
|
|
+ bool completed = false;
|
|
+
|
|
+ spin_lock_irqsave(&req->lock, flags);
|
|
+ if (WARN_ON(!req->num_incomplete_objects) ||
|
|
+ WARN_ON(req->state != MEDIA_REQUEST_STATE_QUEUED))
|
|
+ goto unlock;
|
|
+
|
|
+ if (!--req->num_incomplete_objects) {
|
|
+ req->state = MEDIA_REQUEST_STATE_COMPLETE;
|
|
+ wake_up_interruptible_all(&req->poll_wait);
|
|
+ completed = true;
|
|
+ }
|
|
+unlock:
|
|
+ spin_unlock_irqrestore(&req->lock, flags);
|
|
+ if (completed)
|
|
+ media_request_put(req);
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(media_request_unpin);
|
|
--- a/include/media/media-request.h
|
|
+++ b/include/media/media-request.h
|
|
@@ -189,6 +189,10 @@ static inline void media_request_get(str
|
|
*/
|
|
void media_request_put(struct media_request *req);
|
|
|
|
+void media_request_pin(struct media_request *req);
|
|
+
|
|
+void media_request_unpin(struct media_request *req);
|
|
+
|
|
/**
|
|
* media_request_get_by_fd - Get a media request by fd
|
|
*
|
|
@@ -228,6 +232,14 @@ static inline void media_request_put(str
|
|
{
|
|
}
|
|
|
|
+static inline void media_request_pin(struct media_request *req)
|
|
+{
|
|
+}
|
|
+
|
|
+static inline void media_request_unpin(struct media_request *req)
|
|
+{
|
|
+}
|
|
+
|
|
static inline struct media_request *
|
|
media_request_get_by_fd(struct media_device *mdev, int request_fd)
|
|
{
|