linux-kernel - [PATCH v3 08/10] media: i2c: ov5645: Report streams using frame descriptors

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20241018153230.235647-9-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Fri, 18 Oct 2024 16:32:28 +0100
From: Prabhakar <prabhakar.csengg@...il.com>
To: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Hans Verkuil <hverkuil-cisco@...all.nl>
Cc: linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	Prabhakar <prabhakar.csengg@...il.com>,
	Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH v3 08/10] media: i2c: ov5645: Report streams using frame descriptors

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Implement the .get_frame_desc() subdev operation to report information
about streams to the connected CSI-2 receiver. This is required to let
the CSI-2 receiver driver know about virtual channels and data types for
each stream.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
---
 drivers/media/i2c/ov5645.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/media/i2c/ov5645.c b/drivers/media/i2c/ov5645.c
index a3b9402d39af..e3706b6b5621 100644
--- a/drivers/media/i2c/ov5645.c
+++ b/drivers/media/i2c/ov5645.c
@@ -28,6 +28,7 @@
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>
 #include <linux/types.h>
+#include <media/mipi-csi2.h>
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-event.h>
 #include <media/v4l2-fwnode.h>
@@ -819,6 +820,29 @@ static const struct v4l2_ctrl_ops ov5645_ctrl_ops = {
 	.s_ctrl = ov5645_s_ctrl,
 };
 
+static int ov5645_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad,
+				 struct v4l2_mbus_frame_desc *fd)
+{
+	struct v4l2_subdev_state *state;
+	u32 code;
+
+	state = v4l2_subdev_lock_and_get_active_state(sd);
+	code = v4l2_subdev_state_get_format(state, OV5645_PAD_SOURCE, 0)->code;
+	v4l2_subdev_unlock_state(state);
+
+	fd->type = V4L2_MBUS_FRAME_DESC_TYPE_CSI2;
+	fd->num_entries = 1;
+
+	memset(fd->entry, 0, sizeof(fd->entry));
+
+	fd->entry[0].pixelcode = code;
+	fd->entry[0].stream = 0;
+	fd->entry[0].bus.csi2.vc = 0;
+	fd->entry[0].bus.csi2.dt = MIPI_CSI2_DT_YUV422_8B;
+
+	return 0;
+}
+
 static int ov5645_enum_mbus_code(struct v4l2_subdev *sd,
 				 struct v4l2_subdev_state *sd_state,
 				 struct v4l2_subdev_mbus_code_enum *code)
@@ -991,6 +1015,7 @@ static const struct v4l2_subdev_video_ops ov5645_video_ops = {
 };
 
 static const struct v4l2_subdev_pad_ops ov5645_subdev_pad_ops = {
+	.get_frame_desc = ov5645_get_frame_desc,
 	.enum_mbus_code = ov5645_enum_mbus_code,
 	.enum_frame_size = ov5645_enum_frame_size,
 	.get_fmt = v4l2_subdev_get_fmt,
-- 
2.43.0