drivers/media/platform/ti/omap3isp/ispresizer.h

Source file repositories/reference/linux-study-clean/drivers/media/platform/ti/omap3isp/ispresizer.h

File Facts

System
Linux kernel
Corpus path
drivers/media/platform/ti/omap3isp/ispresizer.h
Extension
.h
Size
3695 bytes
Lines
137
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 isprsz_coef {
	u16 h_filter_coef_4tap[32];
	u16 v_filter_coef_4tap[32];
	/* Every 8th value is a dummy value in the following arrays: */
	u16 h_filter_coef_7tap[32];
	u16 v_filter_coef_7tap[32];
};

/* Chrominance horizontal algorithm */
enum resizer_chroma_algo {
	RSZ_THE_SAME = 0,	/* Chrominance the same as Luminance */
	RSZ_BILINEAR = 1,	/* Chrominance uses bilinear interpolation */
};

/* Resizer input type select */
enum resizer_colors_type {
	RSZ_YUV422 = 0,		/* YUV422 color is interleaved */
	RSZ_COLOR8 = 1,		/* Color separate data on 8 bits */
};

/*
 * Structure for horizontal and vertical resizing value
 */
struct resizer_ratio {
	u32 horz;
	u32 vert;
};

/*
 * Structure for luminance enhancer parameters.
 */
struct resizer_luma_yenh {
	u8 algo;		/* algorithm select. */
	u8 gain;		/* maximum gain. */
	u8 slope;		/* slope. */
	u8 core;		/* core offset. */
};

enum resizer_input_entity {
	RESIZER_INPUT_NONE,
	RESIZER_INPUT_VP,	/* input video port - prev or ccdc */
	RESIZER_INPUT_MEMORY,
};

/* Sink and source resizer pads */
#define RESZ_PAD_SINK			0
#define RESZ_PAD_SOURCE			1
#define RESZ_PADS_NUM			2

/*
 * struct isp_res_device - OMAP3 ISP resizer module
 * @lock: Protects formats and crop rectangles between set_selection and IRQ
 * @crop.request: Crop rectangle requested by the user
 * @crop.active: Active crop rectangle (based on hardware requirements)
 */
struct isp_res_device {
	struct v4l2_subdev subdev;
	struct media_pad pads[RESZ_PADS_NUM];
	struct v4l2_mbus_framefmt formats[RESZ_PADS_NUM];

	enum resizer_input_entity input;
	struct isp_video video_in;
	struct isp_video video_out;

	u32 addr_base;   /* stored source buffer address in memory mode */
	u32 crop_offset; /* additional offset for crop in memory mode */
	struct resizer_ratio ratio;
	int pm_state;
	unsigned int applycrop:1;
	enum isp_pipeline_stream_state state;
	wait_queue_head_t wait;
	atomic_t stopping;
	spinlock_t lock;

	struct {
		struct v4l2_rect request;
		struct v4l2_rect active;
	} crop;
};

struct isp_device;

int omap3isp_resizer_init(struct isp_device *isp);
void omap3isp_resizer_cleanup(struct isp_device *isp);

int omap3isp_resizer_register_entities(struct isp_res_device *res,
				       struct v4l2_device *vdev);
void omap3isp_resizer_unregister_entities(struct isp_res_device *res);
void omap3isp_resizer_isr_frame_sync(struct isp_res_device *res);
void omap3isp_resizer_isr(struct isp_res_device *isp_res);

Annotation

Implementation Notes