drivers/media/pci/intel/ipu6/ipu6-isys-subdev.c

Source file repositories/reference/linux-study-clean/drivers/media/pci/intel/ipu6/ipu6-isys-subdev.c

File Facts

System
Linux kernel
Corpus path
drivers/media/pci/intel/ipu6/ipu6-isys-subdev.c
Extension
.c
Size
9839 bytes
Lines
390
Domain
Driver Families
Bucket
drivers/media
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (asd->supported_codes[i] == format->format.code) {
			code = asd->supported_codes[i];
			break;
		}
	}
	format->format.code = code;
	format->format.field = V4L2_FIELD_NONE;

	/* Store the format and propagate it to the source pad. */
	fmt = v4l2_subdev_state_get_format(state, format->pad, format->stream);
	if (!fmt)
		return -EINVAL;

	*fmt = format->format;

	if (!(sd->entity.pads[format->pad].flags & MEDIA_PAD_FL_SINK))
		return 0;

	/* propagate format to following source pad */
	fmt = v4l2_subdev_state_get_opposite_stream_format(state, format->pad,
							   format->stream);
	if (!fmt)
		return -EINVAL;

	*fmt = format->format;

	ret = v4l2_subdev_routing_find_opposite_end(&state->routing,
						    format->pad,
						    format->stream,
						    &other_pad,
						    &other_stream);
	if (ret)
		return -EINVAL;

	crop = v4l2_subdev_state_get_crop(state, other_pad, other_stream);
	/* reset crop */
	crop->left = 0;
	crop->top = 0;
	crop->width = fmt->width;
	crop->height = fmt->height;

	return 0;
}

int ipu6_isys_subdev_enum_mbus_code(struct v4l2_subdev *sd,
				    struct v4l2_subdev_state *state,
				    struct v4l2_subdev_mbus_code_enum *code)
{
	struct ipu6_isys_subdev *asd = to_ipu6_isys_subdev(sd);
	const u32 *supported_codes = asd->supported_codes;
	u32 index;

	for (index = 0; supported_codes[index]; index++) {
		if (index == code->index) {
			code->code = supported_codes[index];
			return 0;
		}
	}

	return -EINVAL;
}

static int subdev_set_routing(struct v4l2_subdev *sd,
			      struct v4l2_subdev_state *state,
			      struct v4l2_subdev_krouting *routing)
{
	static const struct v4l2_mbus_framefmt format = {
		.width = 4096,
		.height = 3072,
		.code = MEDIA_BUS_FMT_SGRBG10_1X10,
		.field = V4L2_FIELD_NONE,
	};
	int ret;

	ret = v4l2_subdev_routing_validate(sd, routing,
					   V4L2_SUBDEV_ROUTING_ONLY_1_TO_1);
	if (ret)
		return ret;

	return v4l2_subdev_set_routing_with_fmt(sd, state, routing, &format);
}

u32 ipu6_isys_get_src_stream_by_src_pad(struct v4l2_subdev *sd, u32 pad)
{
	struct v4l2_subdev_state *state;
	struct v4l2_subdev_route *routes;
	unsigned int i;
	u32 source_stream = 0;

	state = v4l2_subdev_lock_and_get_active_state(sd);

Annotation

Implementation Notes