linux-kernel - [RFC PATCH V0 2/4] media: subdev: support which in v4l2_subdev_frame

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Date:   Wed, 5 May 2021 16:06:24 +0800
From:   Louis Kuo <louis.kuo@...iatek.com>
To:     <sakari.ailus@...ux.intel.com>,
        <laurent.pinchart@...asonboard.com>, <mchehab@...nel.org>,
        <matthias.bgg@...il.com>, <hverkuil-cisco@...all.nl>,
        <arnd@...db.de>, <louis.kuo@...iatek.com>,
        <sergey.senozhatsky@...il.com>, <helen.koike@...labora.com>,
        <niklas.soderlund+renesas@...natech.se>, <yepeilin.cs@...il.com>
CC:     <frederic.chen@...iatek.com>, <linux-media@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: [RFC PATCH V0 2/4] media: subdev: support which in v4l2_subdev_frame_interval

This patch is to support try or set of VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL
through which parameter.
This behavior is already supported in some similar V4L2 IOCTLs such as
VIDIOC_SUBDEV_ENUM_FRAME_SIZE for the same reason.

Signed-off-by: Louis Kuo <louis.kuo@...iatek.com>
---
 include/uapi/linux/v4l2-subdev.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/uapi/linux/v4l2-subdev.h b/include/uapi/linux/v4l2-subdev.h
index d6ffd5981c68..9d64feaa693b 100644
--- a/include/uapi/linux/v4l2-subdev.h
+++ b/include/uapi/linux/v4l2-subdev.h
@@ -120,12 +120,13 @@ struct v4l2_subdev_frame_size_enum {
  * struct v4l2_subdev_frame_interval - Pad-level frame rate
  * @pad: pad number, as reported by the media API
  * @interval: frame interval in seconds
- * @reserved: drivers and applications must zero this array
+ * @which: format type (from enum v4l2_subdev_format_whence)
  */
 struct v4l2_subdev_frame_interval {
 	__u32 pad;
 	struct v4l2_fract interval;
-	__u32 reserved[9];
+	__u32 which;
+	__u32 reserved[8];
 };
 
 /**
-- 
2.18.0