drivers/media/platform/mediatek/vcodec/decoder/vdec_drv_if.h

File Facts

System

Linux kernel

Corpus path

drivers/media/platform/mediatek/vcodec/decoder/vdec_drv_if.h

Extension

.h

Size

3225 bytes

Lines

104

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

• mtk_vcodec_dec.h

Detected Declarations

• struct vdec_fb_node
• enum vdec_fb_status
• enum vdec_get_param_type

Annotated Snippet

struct vdec_fb_node {
	struct list_head list;
	struct vdec_fb *fb;
};

extern const struct vdec_common_if vdec_h264_if;
extern const struct vdec_common_if vdec_h264_slice_if;
extern const struct vdec_common_if vdec_h264_slice_multi_if;
extern const struct vdec_common_if vdec_vp8_if;
extern const struct vdec_common_if vdec_vp8_slice_if;
extern const struct vdec_common_if vdec_vp9_if;
extern const struct vdec_common_if vdec_vp9_slice_lat_if;
extern const struct vdec_common_if vdec_hevc_slice_multi_if;
extern const struct vdec_common_if vdec_av1_slice_lat_if;

/**
 * vdec_if_init() - initialize decode driver
 * @ctx	: [in] v4l2 context
 * @fourcc	: [in] video format fourcc, V4L2_PIX_FMT_H264/VP8/VP9..
 */
int vdec_if_init(struct mtk_vcodec_dec_ctx *ctx, unsigned int fourcc);

/**
 * vdec_if_deinit() - deinitialize decode driver
 * @ctx	: [in] v4l2 context
 *
 */
void vdec_if_deinit(struct mtk_vcodec_dec_ctx *ctx);

/**
 * vdec_if_decode() - trigger decode
 * @ctx	: [in] v4l2 context
 * @bs	: [in] input bitstream
 * @fb	: [in] frame buffer to store decoded frame, when null means parse
 *	header only
 * @res_chg	: [out] resolution change happens if current bs have different
 *	picture width/height
 * Note: To flush the decoder when reaching EOF, set input bitstream as NULL.
 *
 * Return: 0 on success. -EIO on unrecoverable error.
 */
int vdec_if_decode(struct mtk_vcodec_dec_ctx *ctx, struct mtk_vcodec_mem *bs,
		   struct vdec_fb *fb, bool *res_chg);

/**
 * vdec_if_get_param() - get driver's parameter
 * @ctx	: [in] v4l2 context
 * @type	: [in] input parameter type
 * @out	: [out] buffer to store query result
 */
int vdec_if_get_param(struct mtk_vcodec_dec_ctx *ctx, enum vdec_get_param_type type,
		      void *out);

#endif

Annotation

• Immediate include surface: `mtk_vcodec_dec.h`.
• Detected declarations: `struct vdec_fb_node`, `enum vdec_fb_status`, `enum vdec_get_param_type`.
• 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.