[PATCH v2 5/6] media: i2c: imx219: Report streams using frame descriptors

Cosmin Tanislav
2025-02-20T23:08:53Z

From: Laurent Pinchart <laurent.pinchart@ideasonboard.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: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
drivers/media/i2c/imx219.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c
index ad1965a91ae3c..4c4ebe54f191b 100644
--- a/drivers/media/i2c/imx219.c
+++ b/drivers/media/i2c/imx219.c
@@ -23,6 +23,7 @@
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>

+#include <media/mipi-csi2.h>
#include <media/v4l2-cci.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
@@ -990,6 +991,28 @@ static int imx219_init_state(struct v4l2_subdev *sd,
return 0;
}

+static int imx219_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, 0)->code;
+ v4l2_subdev_unlock_state(state);
+
+ fd->type = V4L2_MBUS_FRAME_DESC_TYPE_CSI2;
+ fd->num_entries = 1;
+
+ fd->entry[0].pixelcode = code;
+ fd->entry[0].stream = 0;
+ fd->entry[0].bus.csi2.vc = 0;
+ fd->entry[0].bus.csi2.dt = imx219_get_format_bpp(code) == 8
+ ? MIPI_CSI2_DT_RAW8 : MIPI_CSI2_DT_RAW10;
+
+ return 0;
+}
+
static const struct v4l2_subdev_video_ops imx219_video_ops = {
.s_stream = imx219_set_stream,
};
@@ -1000,6 +1023,7 @@ static const struct v4l2_subdev_pad_ops imx219_pad_ops = {
.set_fmt = imx219_set_pad_format,
.get_selection = imx219_get_selection,
.enum_frame_size = imx219_enum_frame_size,
+ .get_frame_desc = imx219_get_frame_desc,
};

static const struct v4l2_subdev_ops imx219_subdev_ops = {
--
2.48.1