media: atomisp: Pass MEDIA_BUS_FMT_* code when calling enum_frame_size pad-op

A sensor driver's enum_frame_size pad-op may return -EINVAL when
v4l2_subdev_frame_size_enum.code is not set to a supported
MEDIA_BUS_FMT_* code.

Make atomisp_init_sensor() get the sensor's MEDIA_BUS_FMT_* code and
pass this when calling the enum_frame_size pad-op.

Link: https://lore.kernel.org/r/20230529103741.11904-17-hdegoede@redhat.comSigned-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/staging/media/atomisp/pci/atomisp_internal.h

@@ -125,6 +125,7 @@
 struct atomisp_input_subdev {
 	unsigned int type;
 	enum atomisp_camera_port port;
+	u32 code; /* MEDIA_BUS_FMT_* */
 	bool crop_support;
 	struct v4l2_subdev *camera;
 	/* Sensor rects for sensors which support crop */

drivers/staging/media/atomisp/pci/atomisp_ioctl.c

@@ -707,6 +707,7 @@ static int atomisp_enum_framesizes(struct file *file, void *priv,
 	struct v4l2_subdev_frame_size_enum fse = {
 		.index = fsize->index,
 		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
+		.code = input->code,
 	};
 	int ret;
 

drivers/staging/media/atomisp/pci/atomisp_v4l2.c

@@ -933,12 +933,18 @@ static int atomisp_register_entities(struct atomisp_device *isp)
 
 static void atomisp_init_sensor(struct atomisp_input_subdev *input)
 {
+	struct v4l2_subdev_mbus_code_enum mbus_code_enum = { };
 	struct v4l2_subdev_state sd_state = {
 		.pads = &input->pad_cfg,
 	};
 	struct v4l2_subdev_selection sel = { };
 	int err;
 
+	mbus_code_enum.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+	err = v4l2_subdev_call(input->camera, pad, enum_mbus_code, NULL, &mbus_code_enum);
+	if (!err)
+		input->code = mbus_code_enum.code;
+
 	sel.which = V4L2_SUBDEV_FORMAT_ACTIVE;
 	sel.target = V4L2_SEL_TGT_NATIVE_SIZE;
 	err = v4l2_subdev_call(input->camera, pad, get_selection, NULL, &sel);