linux-kernel - [RFCv4 11/21] media: v4l2_fh: add request entity field

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Date:   Tue, 20 Feb 2018 13:44:15 +0900
From:   Alexandre Courbot <acourbot@...omium.org>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Pawel Osciak <posciak@...omium.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Tomasz Figa <tfiga@...omium.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc:     Gustavo Padovan <gustavo.padovan@...labora.com>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Alexandre Courbot <acourbot@...omium.org>
Subject: [RFCv4 11/21] media: v4l2_fh: add request entity field

Allow drivers to assign a request entity to v4l2_fh. This will be useful
for request-aware ioctls to find out which request entity to use.

Signed-off-by: Alexandre Courbot <acourbot@...omium.org>
---
 include/media/v4l2-fh.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/media/v4l2-fh.h b/include/media/v4l2-fh.h
index ea73fef8bdc0..f54cb319dd64 100644
--- a/include/media/v4l2-fh.h
+++ b/include/media/v4l2-fh.h
@@ -28,6 +28,7 @@
 
 struct video_device;
 struct v4l2_ctrl_handler;
+struct media_request_entity;
 
 /**
  * struct v4l2_fh - Describes a V4L2 file handler
@@ -43,6 +44,7 @@ struct v4l2_ctrl_handler;
  * @navailable: number of available events at @available list
  * @sequence: event sequence number
  * @m2m_ctx: pointer to &struct v4l2_m2m_ctx
+ * @entity: the request entity this fh operates on behalf of
  */
 struct v4l2_fh {
 	struct list_head	list;
@@ -60,6 +62,7 @@ struct v4l2_fh {
 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV)
 	struct v4l2_m2m_ctx	*m2m_ctx;
 #endif
+	struct media_request_entity *entity;
 };
 
 /**
-- 
2.16.1.291.g4437f3f132-goog