linux-kernel - [PATCH 2/2] media: v4l2: map UVC_CT_ROLL_ABSOLUTE

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Message-ID: <163b1aee53fa78fe1a8d0b8bb7b0f7be1f1975c9.1718216718.git.soyer@irl.hu>
Date: Wed, 12 Jun 2024 20:31:14 +0200
From: Gergo Koteles <soyer@....hu>
To: Mauro Carvalho Chehab <mchehab@...nel.org>,
  Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
  Gergo Koteles <soyer@....hu>
Subject: [PATCH 2/2] media: v4l2: map UVC_CT_ROLL_ABSOLUTE_CONTROL

Some new UVC cameras can report whether they are mounted in 'portrait
mode'.

Current roll degrees (-90, 0, 90, 180) are reported with
UVC_CT_ROLL_ABSOLUTE_CONTROL.

Map UVC_CT_ROLL_ABSOLUTE_CONTROL to V4L2_CID_ROLL_ABSOLUTE to
make it available to userspace.

Signed-off-by: Gergo Koteles <soyer@....hu>
---
 drivers/media/usb/uvc/uvc_ctrl.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index 4b685f883e4d..bc3272b6ceb1 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -748,6 +748,15 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
 		.v4l2_type	= V4L2_CTRL_TYPE_BOOLEAN,
 		.data_type	= UVC_CTRL_DATA_TYPE_BOOLEAN,
 	},
+	{
+		.id		= V4L2_CID_ROLL_ABSOLUTE,
+		.entity		= UVC_GUID_UVC_CAMERA,
+		.selector	= UVC_CT_ROLL_ABSOLUTE_CONTROL,
+		.size		= 16,
+		.offset		= 0,
+		.v4l2_type	= V4L2_CTRL_TYPE_INTEGER,
+		.data_type	= UVC_CTRL_DATA_TYPE_SIGNED,
+	},
 };
 
 const struct uvc_control_mapping uvc_ctrl_power_line_mapping_limited = {
-- 
2.45.2