drivers/media/platform/nvidia/tegra-vde/vde.h

Source file repositories/reference/linux-study-clean/drivers/media/platform/nvidia/tegra-vde/vde.h

File Facts

System
Linux kernel
Corpus path
drivers/media/platform/nvidia/tegra-vde/vde.h
Extension
.h
Size
6057 bytes
Lines
243
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

struct tegra_video_frame {
	struct dma_buf_attachment *y_dmabuf_attachment;
	struct dma_buf_attachment *cb_dmabuf_attachment;
	struct dma_buf_attachment *cr_dmabuf_attachment;
	struct dma_buf_attachment *aux_dmabuf_attachment;
	dma_addr_t y_addr;
	dma_addr_t cb_addr;
	dma_addr_t cr_addr;
	dma_addr_t aux_addr;
	u32 frame_num;
	u32 flags;
	u32 luma_atoms_pitch;
	u32 chroma_atoms_pitch;
};

struct tegra_coded_fmt_desc {
	u32 fourcc;
	struct v4l2_frmsize_stepwise frmsize;
	unsigned int num_decoded_fmts;
	const u32 *decoded_fmts;
	int (*decode_run)(struct tegra_ctx *ctx);
	int (*decode_wait)(struct tegra_ctx *ctx);
};

struct tegra_vde_soc {
	bool supports_ref_pic_marking;
	const struct tegra_coded_fmt_desc *coded_fmts;
	u32 num_coded_fmts;
};

struct tegra_vde_bo {
	struct iova *iova;
	struct sg_table sgt;
	struct tegra_vde *vde;
	enum dma_data_direction dma_dir;
	unsigned long dma_attrs;
	dma_addr_t dma_handle;
	dma_addr_t dma_addr;
	void *dma_cookie;
	size_t size;
};

struct tegra_vde {
	void __iomem *sxe;
	void __iomem *bsev;
	void __iomem *mbe;
	void __iomem *ppe;
	void __iomem *mce;
	void __iomem *tfe;
	void __iomem *ppb;
	void __iomem *vdma;
	void __iomem *frameid;
	struct device *dev;
	struct mutex lock;
	struct mutex map_lock;
	struct list_head map_list;
	struct reset_control *rst;
	struct reset_control *rst_mc;
	struct tegra_pmc *pmc;
	struct gen_pool *iram_pool;
	struct completion decode_completion;
	struct clk *clk;
	struct iommu_domain *domain;
	struct iommu_group *group;
	struct iova_domain iova;
	struct iova *iova_resv_static_addresses;
	struct iova *iova_resv_last_page;
	const struct tegra_vde_soc *soc;
	struct tegra_vde_bo *secure_bo;
	dma_addr_t bitstream_data_addr;
	dma_addr_t iram_lists_addr;
	u32 *iram;
	struct v4l2_device v4l2_dev;
	struct v4l2_m2m_dev *m2m;
	struct media_device mdev;
	struct video_device vdev;
	struct mutex v4l2_lock;
	struct workqueue_struct *wq;
	struct tegra_video_frame frames[V4L2_H264_NUM_DPB_ENTRIES + 1];
};

int tegra_vde_alloc_bo(struct tegra_vde *vde,
		       struct tegra_vde_bo **ret_bo,
		       enum dma_data_direction dma_dir,
		       size_t size);
void tegra_vde_free_bo(struct tegra_vde_bo *bo);

struct tegra_ctx_h264 {
	const struct v4l2_ctrl_h264_decode_params *decode_params;
	const struct v4l2_ctrl_h264_sps *sps;

Annotation

Implementation Notes