drivers/media/platform/verisilicon/sama5d4_vdec_hw.c

File Facts

System

Linux kernel

Corpus path

drivers/media/platform/verisilicon/sama5d4_vdec_hw.c

Extension

.c

Size

3043 bytes

Lines

129

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.

• 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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• hantro.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * Hantro VDEC driver
 *
 * Copyright (C) 2021 Collabora Ltd, Emil Velikov <emil.velikov@collabora.com>
 */

#include "hantro.h"

/*
 * Supported formats.
 */

static const struct hantro_fmt sama5d4_vdec_postproc_fmts[] = {
	{
		.fourcc = V4L2_PIX_FMT_YUYV,
		.codec_mode = HANTRO_MODE_NONE,
		.postprocessed = true,
		.frmsize = {
			.min_width = FMT_MIN_WIDTH,
			.max_width = FMT_HD_WIDTH,
			.step_width = MB_DIM,
			.min_height = FMT_MIN_HEIGHT,
			.max_height = FMT_HD_HEIGHT,
			.step_height = MB_DIM,
		},
	},
};

static const struct hantro_fmt sama5d4_vdec_fmts[] = {
	{
		.fourcc = V4L2_PIX_FMT_NV12,
		.codec_mode = HANTRO_MODE_NONE,
		.frmsize = {
			.min_width = FMT_MIN_WIDTH,
			.max_width = FMT_HD_WIDTH,
			.step_width = MB_DIM,
			.min_height = FMT_MIN_HEIGHT,
			.max_height = FMT_HD_HEIGHT,
			.step_height = MB_DIM,
		},
	},
	{
		.fourcc = V4L2_PIX_FMT_MPEG2_SLICE,
		.codec_mode = HANTRO_MODE_MPEG2_DEC,
		.max_depth = 2,
		.frmsize = {
			.min_width = FMT_MIN_WIDTH,
			.max_width = FMT_HD_WIDTH,
			.step_width = MB_DIM,
			.min_height = FMT_MIN_HEIGHT,
			.max_height = FMT_HD_HEIGHT,
			.step_height = MB_DIM,
		},
	},
	{
		.fourcc = V4L2_PIX_FMT_VP8_FRAME,
		.codec_mode = HANTRO_MODE_VP8_DEC,
		.max_depth = 2,
		.frmsize = {
			.min_width = FMT_MIN_WIDTH,
			.max_width = FMT_HD_WIDTH,
			.step_width = MB_DIM,
			.min_height = FMT_MIN_HEIGHT,
			.max_height = FMT_HD_HEIGHT,
			.step_height = MB_DIM,
		},
	},
	{
		.fourcc = V4L2_PIX_FMT_H264_SLICE,
		.codec_mode = HANTRO_MODE_H264_DEC,
		.max_depth = 2,
		.frmsize = {
			.min_width = FMT_MIN_WIDTH,
			.max_width = FMT_HD_WIDTH,
			.step_width = MB_DIM,
			.min_height = FMT_MIN_HEIGHT,
			.max_height = FMT_HD_HEIGHT,
			.step_height = MB_DIM,
		},
	},
};

/*
 * Supported codec ops.
 */

static const struct hantro_codec_ops sama5d4_vdec_codec_ops[] = {
	[HANTRO_MODE_MPEG2_DEC] = {
		.run = hantro_g1_mpeg2_dec_run,

Annotation

• Immediate include surface: `hantro.h`.
• Atlas domain: Driver Families / drivers/media.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.