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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.
*/
#include <linux/dma-mapping.h>
#include "b2r2_filters.h"
#include "b2r2_internal.h"
#include "b2r2_debug.h"
/**
* struct b2r2_filter_spec filters[] - Filter lookup table
*
* Lookup table for filters for different scale factors. A filter
* will be selected according to "min < scale_factor <= max".
*/
static struct b2r2_filter_spec filters[] = {
{
.min = 1024,
.max = 1433,
.h_coeffs = {
0x00, 0x00, 0xFA, 0x09, 0x34, 0x09, 0x00, 0x00,
0x00, 0x00, 0xF9, 0x10, 0x32, 0x06, 0xFF, 0x00,
0x00, 0x00, 0xF8, 0x17, 0x2F, 0x02, 0x00, 0x00,
0x00, 0x00, 0xF7, 0x20, 0x2A, 0xFF, 0x00, 0x00,
0x00, 0x00, 0xF8, 0x27, 0x25, 0xFC, 0x00, 0x00,
0x00, 0x00, 0xFA, 0x2D, 0x1D, 0xFC, 0x00, 0x00,
0x00, 0x00, 0xFE, 0x31, 0x15, 0xFC, 0x00, 0x00,
0x00, 0x00, 0x02, 0x35, 0x0D, 0xFC, 0x00, 0x00
},
.v_coeffs = {
0x00, 0x02, 0x3C, 0x02, 0x00,
0x00, 0x08, 0x3B, 0xFD, 0x00,
0x00, 0x10, 0x35, 0xFB, 0x00,
0x00, 0x18, 0x30, 0xF8, 0x00,
0x00, 0x1F, 0x27, 0xFA, 0x00,
0x00, 0x27, 0x1E, 0xFB, 0x00,
0x00, 0x2E, 0x16, 0xFC, 0x00,
0x00, 0x34, 0x0D, 0xFF, 0x00
},
},
{
.min = 1433,
.max = 1536,
.h_coeffs = {
0xfe, 0x06, 0xf8, 0x0b, 0x30, 0x0b, 0xf8, 0x06,
0xff, 0x06, 0xf7, 0x12, 0x2d, 0x05, 0xfa, 0x06,
0x00, 0x04, 0xf6, 0x18, 0x2c, 0x00, 0xfc, 0x06,
0x01, 0x02, 0xf7, 0x1f, 0x27, 0xfd, 0xff, 0x04,
0x03, 0x00, 0xf9, 0x24, 0x24, 0xf9, 0x00, 0x03,
0x04, 0xff, 0xfd, 0x29, 0x1d, 0xf7, 0x02, 0x01,
0x06, 0xfc, 0x00, 0x2d, 0x17, 0xf6, 0x04, 0x00,
0x06, 0xfa, 0x05, 0x30, 0x0f, 0xf7, 0x06, 0xff
},
.v_coeffs = {
0xf6, 0x0e, 0x38, 0x0e, 0xf6,
0xf5, 0x15, 0x38, 0x06, 0xf8,
0xf5, 0x1d, 0x33, 0x00, 0xfb,
0xf6, 0x23, 0x2d, 0xfc, 0xfe,
0xf9, 0x28, 0x26, 0xf9, 0x00,
0xfc, 0x2c, 0x1e, 0xf7, 0x03,
0x00, 0x2e, 0x18, 0xf6, 0x04,
0x05, 0x2e, 0x11, 0xf7, 0x05
},
},
{
.min = 1536,
.max = 3072,
.h_coeffs = {
0xfc, 0xfd, 0x06, 0x13, 0x18, 0x13, 0x06, 0xfd,
0xfc, 0xfe, 0x08, 0x15, 0x17, 0x12, 0x04, 0xfc,
0xfb, 0xfe, 0x0a, 0x16, 0x18, 0x10, 0x03, 0xfc,
0xfb, 0x00, 0x0b, 0x18, 0x17, 0x0f, 0x01, 0xfb,
0xfb, 0x00, 0x0d, 0x19, 0x17, 0x0d, 0x00, 0xfb,
0xfb, 0x01, 0x0f, 0x19, 0x16, 0x0b, 0x00, 0xfb,
0xfc, 0x03, 0x11, 0x19, 0x15, 0x09, 0xfe, 0xfb,
0xfc, 0x04, 0x12, 0x1a, 0x12, 0x08, 0xfe, 0xfc
},
.v_coeffs = {
0x05, 0x10, 0x16, 0x10, 0x05,
0x06, 0x11, 0x16, 0x0f, 0x04,
0x08, 0x13, 0x15, 0x0e, 0x02,
0x09, 0x14, 0x16, 0x0c, 0x01,
0x0b, 0x15, 0x15, 0x0b, 0x00,
0x0d, 0x16, 0x13, 0x0a, 0x00,
0x0f, 0x17, 0x13, 0x08, 0xff,
0x11, 0x18, 0x12, 0x07, 0xfe
},
},
{
.min = 3072,
.max = 4096,
.h_coeffs = {
0xfe, 0x02, 0x09, 0x0f, 0x0e, 0x0f, 0x09, 0x02,
0xff, 0x02, 0x09, 0x0f, 0x10, 0x0e, 0x08, 0x01,
0xff, 0x03, 0x0a, 0x10, 0x10, 0x0d, 0x07, 0x00,
0x00, 0x04, 0x0b, 0x10, 0x0f, 0x0c, 0x06, 0x00,
0x00, 0x05, 0x0c, 0x10, 0x0e, 0x0c, 0x05, 0x00,
0x00, 0x06, 0x0c, 0x11, 0x0e, 0x0b, 0x04, 0x00,
0x00, 0x07, 0x0d, 0x11, 0x0f, 0x0a, 0x03, 0xff,
0x01, 0x08, 0x0e, 0x11, 0x0e, 0x09, 0x02, 0xff
},
.v_coeffs = {
0x09, 0x0f, 0x10, 0x0f, 0x09,
0x09, 0x0f, 0x12, 0x0e, 0x08,
0x0a, 0x10, 0x11, 0x0e, 0x07,
0x0b, 0x11, 0x11, 0x0d, 0x06,
0x0c, 0x11, 0x12, 0x0c, 0x05,
0x0d, 0x12, 0x11, 0x0c, 0x04,
0x0e, 0x12, 0x11, 0x0b, 0x04,
0x0f, 0x13, 0x11, 0x0a, 0x03
},
},
{
.min = 4096,
.max = 5120,
.h_coeffs = {
0x00, 0x04, 0x09, 0x0c, 0x0e, 0x0c, 0x09, 0x04,
0x01, 0x05, 0x09, 0x0c, 0x0d, 0x0c, 0x08, 0x04,
0x01, 0x05, 0x0a, 0x0c, 0x0e, 0x0b, 0x08, 0x03,
0x02, 0x06, 0x0a, 0x0d, 0x0c, 0x0b, 0x07, 0x03,
0x02, 0x07, 0x0a, 0x0d, 0x0d, 0x0a, 0x07, 0x02,
0x03, 0x07, 0x0b, 0x0d, 0x0c, 0x0a, 0x06, 0x02,
0x03, 0x08, 0x0b, 0x0d, 0x0d, 0x0a, 0x05, 0x01,
0x04, 0x08, 0x0c, 0x0d, 0x0c, 0x09, 0x05, 0x01
},
.v_coeffs = {
0x0a, 0x0e, 0x10, 0x0e, 0x0a,
0x0b, 0x0e, 0x0f, 0x0e, 0x0a,
0x0b, 0x0f, 0x10, 0x0d, 0x09,
0x0c, 0x0f, 0x10, 0x0d, 0x08,
0x0d, 0x0f, 0x0f, 0x0d, 0x08,
0x0d, 0x10, 0x10, 0x0c, 0x07,
0x0e, 0x10, 0x0f, 0x0c, 0x07,
0x0f, 0x10, 0x10, 0x0b, 0x06
},
},
};
static const size_t filters_size = sizeof(filters)/sizeof(filters[0]);
/**
* struct b2r2_filter_spec bilinear_filter - A bilinear filter
*
* The bilinear filter will be used if no custom filters are specified, or
* for upscales not matching any filter in the lookup table.
*/
static struct b2r2_filter_spec bilinear_filter = {
.min = 0,
.max = 0xffff,
.h_coeffs = {
0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00,
0x00, 0x00, 0xff, 0x08, 0x3e, 0xfb, 0x00, 0x00,
0x00, 0x00, 0xfb, 0x13, 0x3b, 0xf7, 0x00, 0x00,
0x00, 0x00, 0xf8, 0x1f, 0x34, 0xf5, 0x00, 0x00,
0x00, 0x00, 0xf6, 0x2b, 0x2a, 0xf5, 0x00, 0x00,
0x00, 0x00, 0xf6, 0x35, 0x1e, 0xf7, 0x00, 0x00,
0x00, 0x00, 0xf9, 0x3c, 0x12, 0xf9, 0x00, 0x00,
0x00, 0x00, 0xfd, 0x3f, 0x07, 0xfd, 0x00, 0x00
},
.v_coeffs = {
0x00, 0x00, 0x40, 0x00, 0x00,
0x00, 0x09, 0x3d, 0xfa, 0x00,
0x00, 0x13, 0x39, 0xf4, 0x00,
0x00, 0x1e, 0x31, 0xf1, 0x00,
0x00, 0x27, 0x28, 0xf1, 0x00,
0x00, 0x31, 0x1d, 0xf2, 0x00,
0x00, 0x38, 0x12, 0xf6, 0x00,
0x00, 0x3d, 0x07, 0xfc, 0x00
},
};
/**
* struct b2r2_filter_spec default_downscale_filter - Default filter for downscale
*
* The default downscale filter will be used for downscales not matching any
* filter in the lookup table.
*/
static struct b2r2_filter_spec default_downscale_filter = {
.min = 1 << 10,
.max = 0xffff,
.h_coeffs = {
0x03, 0x06, 0x09, 0x0b, 0x09, 0x0b, 0x09, 0x06,
0x03, 0x06, 0x09, 0x0b, 0x0c, 0x0a, 0x08, 0x05,
0x03, 0x06, 0x09, 0x0b, 0x0c, 0x0a, 0x08, 0x05,
0x04, 0x07, 0x09, 0x0b, 0x0b, 0x0a, 0x08, 0x04,
0x04, 0x07, 0x0a, 0x0b, 0x0b, 0x0a, 0x07, 0x04,
0x04, 0x08, 0x0a, 0x0b, 0x0b, 0x09, 0x07, 0x04,
0x05, 0x08, 0x0a, 0x0b, 0x0c, 0x09, 0x06, 0x03,
0x05, 0x08, 0x0a, 0x0b, 0x0c, 0x09, 0x06, 0x03
},
.v_coeffs = {
0x0b, 0x0e, 0x0e, 0x0e, 0x0b,
0x0b, 0x0e, 0x0f, 0x0d, 0x0b,
0x0c, 0x0e, 0x0f, 0x0d, 0x0a,
0x0c, 0x0e, 0x0f, 0x0d, 0x0a,
0x0d, 0x0f, 0x0e, 0x0d, 0x09,
0x0d, 0x0f, 0x0f, 0x0c, 0x09,
0x0e, 0x0f, 0x0e, 0x0c, 0x09,
0x0e, 0x0f, 0x0f, 0x0c, 0x08
},
};
/**
* struct b2r2_filter_spec blur_filter - Blur filter
*
* Filter for blurring an image.
*/
static struct b2r2_filter_spec blur_filter = {
.min = 0,
.max = 0xffff,
.h_coeffs = {
0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08
},
.v_coeffs = {
0x0c, 0x0c, 0x10, 0x0c, 0x0c,
0x0c, 0x0c, 0x10, 0x0c, 0x0c,
0x0c, 0x0c, 0x10, 0x0c, 0x0c,
0x0c, 0x0c, 0x10, 0x0c, 0x0c,
0x0c, 0x0c, 0x10, 0x0c, 0x0c,
0x0c, 0x0c, 0x10, 0x0c, 0x0c,
0x0c, 0x0c, 0x10, 0x0c, 0x0c,
0x0c, 0x0c, 0x10, 0x0c, 0x0c
},
};
/* Private function declarations */
static int alloc_filter_coeffs(struct device *dev,
struct b2r2_filter_spec *filter);
static void free_filter_coeffs(struct device *dev,
struct b2r2_filter_spec *filter);
/* Public functions */
int b2r2_filters_init(struct b2r2_control *cont)
{
int i;
if (cont->filters_initialized)
return 0;
for (i = 0; i < filters_size; i++) {
alloc_filter_coeffs(cont->dev, &filters[i]);
}
alloc_filter_coeffs(cont->dev, &bilinear_filter);
alloc_filter_coeffs(cont->dev, &default_downscale_filter);
alloc_filter_coeffs(cont->dev, &blur_filter);
cont->filters_initialized = 1;
return 0;
}
void b2r2_filters_exit(struct b2r2_control *cont)
{
int i;
if (!cont->filters_initialized)
return;
for (i = 0; i < filters_size; i++) {
free_filter_coeffs(cont->dev, &filters[i]);
}
free_filter_coeffs(cont->dev, &bilinear_filter);
free_filter_coeffs(cont->dev, &default_downscale_filter);
free_filter_coeffs(cont->dev, &blur_filter);
cont->filters_initialized = 0;
}
struct b2r2_filter_spec *b2r2_filter_find(u16 scale_factor)
{
int i;
struct b2r2_filter_spec *filter = NULL;
for (i = 0; i < filters_size; i++) {
if ((filters[i].min < scale_factor) &&
(scale_factor <= filters[i].max) &&
filters[i].h_coeffs_dma_addr &&
filters[i].v_coeffs_dma_addr) {
filter = &filters[i];
break;
}
}
if (filter == NULL) {
/*
* No suitable filter has been found. Use default filters,
* bilinear for any upscale.
*/
if (scale_factor < (1 << 10))
filter = &bilinear_filter;
else
filter = &default_downscale_filter;
}
/*
* Check so that the coefficients were successfully allocated for this
* filter.
*/
if (!filter->h_coeffs_dma_addr || !filter->v_coeffs_dma_addr)
return NULL;
else
return filter;
}
struct b2r2_filter_spec *b2r2_filter_blur()
{
return &blur_filter;
}
/* Private functions */
static int alloc_filter_coeffs(struct device *dev,
struct b2r2_filter_spec *filter)
{
int ret;
filter->h_coeffs_dma_addr = dma_alloc_coherent(dev,
B2R2_HF_TABLE_SIZE, &(filter->h_coeffs_phys_addr),
GFP_DMA | GFP_KERNEL);
if (filter->h_coeffs_dma_addr == NULL) {
ret = -ENOMEM;
goto error;
}
filter->v_coeffs_dma_addr = dma_alloc_coherent(dev,
B2R2_VF_TABLE_SIZE, &(filter->v_coeffs_phys_addr),
GFP_DMA | GFP_KERNEL);
if (filter->v_coeffs_dma_addr == NULL) {
ret = -ENOMEM;
goto error;
}
memcpy(filter->h_coeffs_dma_addr, filter->h_coeffs,
B2R2_HF_TABLE_SIZE);
memcpy(filter->v_coeffs_dma_addr, filter->v_coeffs,
B2R2_VF_TABLE_SIZE);
return 0;
error:
free_filter_coeffs(dev, filter);
return ret;
}
static void free_filter_coeffs(struct device *dev,
struct b2r2_filter_spec *filter)
{
if (filter->h_coeffs_dma_addr != NULL)
dma_free_coherent(dev, B2R2_HF_TABLE_SIZE,
filter->h_coeffs_dma_addr,
filter->h_coeffs_phys_addr);
if (filter->v_coeffs_dma_addr != NULL)
dma_free_coherent(dev, B2R2_VF_TABLE_SIZE,
filter->v_coeffs_dma_addr,
filter->v_coeffs_phys_addr);
filter->h_coeffs_dma_addr = NULL;
filter->h_coeffs_phys_addr = 0;
filter->v_coeffs_dma_addr = NULL;
filter->v_coeffs_phys_addr = 0;
}
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