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/*
* Copyright (C) ST-Ericsson SA 2010
*
* ST-Ericsson B2R2 filters.
*
* Author: Fredrik Allansson <fredrik.allansson@stericsson.com> for ST-Ericsson.
*
* License terms: GNU General Public License (GPL), version 2.
*/
#ifndef _LINUX_VIDEO_B2R2_FILTERS_H
#define _LINUX_VIDEO_B2R2_FILTERS_H
#include <linux/kernel.h>
#include "b2r2_internal.h"
#define B2R2_HF_TABLE_SIZE 64
#define B2R2_VF_TABLE_SIZE 40
/**
* @struct b2r2_filter_spec - Filter specification structure
*
* @param min - Minimum scale factor for this filter (in 6.10 fixed point)
* @param max - Maximum scale factor for this filter (in 6.10 fixed point)
* @param h_coeffs - Horizontal filter coefficients
* @param v_coeffs - Vertical filter coefficients
* @param h_coeffs_dma_addr - Virtual DMA address for horizontal coefficients
* @param v_coeffs_dma_addr - Virtual DMA address for vertical coefficients
* @param h_coeffs_phys_addr - Physical address for horizontal coefficients
* @param v_coeffs_phys_addr - Physical address for vertical coefficients
*/
struct b2r2_filter_spec {
const u16 min;
const u16 max;
const u8 h_coeffs[B2R2_HF_TABLE_SIZE];
const u8 v_coeffs[B2R2_VF_TABLE_SIZE];
void *h_coeffs_dma_addr;
u32 h_coeffs_phys_addr;
void *v_coeffs_dma_addr;
u32 v_coeffs_phys_addr;
};
/**
* b2r2_filters_init() - Initilizes the B2R2 filters
*/
int b2r2_filters_init(struct b2r2_control *control);
/**
* b2r2_filters_init() - De-initilizes the B2R2 filters
*/
void b2r2_filters_exit(struct b2r2_control *control);
/**
* b2r2_filter_find() - Find a filter matching the given scale factor
*
* @param scale_factor - Scale factor to find a filter for
*
* Returns NULL if no filter could be found.
*/
struct b2r2_filter_spec *b2r2_filter_find(u16 scale_factor);
/**
* b2r2_filter_blur() - Returns the blur filter
*
* Returns NULL if no blur filter is available.
*/
struct b2r2_filter_spec *b2r2_filter_blur(void);
#endif /* _LINUX_VIDEO_B2R2_FILTERS_H */
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