drivers/staging/media/sunxi/cedrus/cedrus.c

Source file repositories/reference/linux-study-clean/drivers/staging/media/sunxi/cedrus/cedrus.c

File Facts

System
Linux kernel
Corpus path
drivers/staging/media/sunxi/cedrus/cedrus.c
Extension
.c
Size
17316 bytes
Lines
724
Domain
Driver Families
Bucket
drivers/staging
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 (vb2_is_busy(vq)) {
			if (ctx->bit_depth < bit_depth)
				return -EINVAL;
		} else {
			ctx->bit_depth = bit_depth;
			cedrus_reset_cap_format(ctx);
		}
	}

	return 0;
}

static const struct v4l2_ctrl_ops cedrus_ctrl_ops = {
	.try_ctrl = cedrus_try_ctrl,
};

static const struct cedrus_control cedrus_controls[] = {
	{
		.cfg = {
			.id	= V4L2_CID_STATELESS_MPEG2_SEQUENCE,
		},
		.capabilities	= CEDRUS_CAPABILITY_MPEG2_DEC,
	},
	{
		.cfg = {
			.id	= V4L2_CID_STATELESS_MPEG2_PICTURE,
		},
		.capabilities	= CEDRUS_CAPABILITY_MPEG2_DEC,
	},
	{
		.cfg = {
			.id	= V4L2_CID_STATELESS_MPEG2_QUANTISATION,
		},
		.capabilities	= CEDRUS_CAPABILITY_MPEG2_DEC,
	},
	{
		.cfg = {
			.id	= V4L2_CID_STATELESS_H264_DECODE_PARAMS,
		},
		.capabilities	= CEDRUS_CAPABILITY_H264_DEC,
	},
	{
		.cfg = {
			.id	= V4L2_CID_STATELESS_H264_SLICE_PARAMS,
		},
		.capabilities	= CEDRUS_CAPABILITY_H264_DEC,
	},
	{
		.cfg = {
			.id	= V4L2_CID_STATELESS_H264_SPS,
			.ops	= &cedrus_ctrl_ops,
		},
		.capabilities	= CEDRUS_CAPABILITY_H264_DEC,
	},
	{
		.cfg = {
			.id	= V4L2_CID_STATELESS_H264_PPS,
		},
		.capabilities	= CEDRUS_CAPABILITY_H264_DEC,
	},
	{
		.cfg = {
			.id	= V4L2_CID_STATELESS_H264_SCALING_MATRIX,
		},
		.capabilities	= CEDRUS_CAPABILITY_H264_DEC,
	},
	{
		.cfg = {
			.id	= V4L2_CID_STATELESS_H264_PRED_WEIGHTS,
		},
		.capabilities	= CEDRUS_CAPABILITY_H264_DEC,
	},
	{
		.cfg = {
			.id	= V4L2_CID_STATELESS_H264_DECODE_MODE,
			.max	= V4L2_STATELESS_H264_DECODE_MODE_SLICE_BASED,
			.def	= V4L2_STATELESS_H264_DECODE_MODE_SLICE_BASED,
		},
		.capabilities	= CEDRUS_CAPABILITY_H264_DEC,
	},
	{
		.cfg = {
			.id	= V4L2_CID_STATELESS_H264_START_CODE,
			.max	= V4L2_STATELESS_H264_START_CODE_NONE,
			.def	= V4L2_STATELESS_H264_START_CODE_NONE,
		},
		.capabilities	= CEDRUS_CAPABILITY_H264_DEC,
	},
	/*
	 * We only expose supported profiles information,

Annotation

Implementation Notes