diff options
Diffstat (limited to 'drivers/staging/media/atomisp/pci/isp/kernels/xnr/xnr_3.0')
4 files changed, 469 insertions, 0 deletions
diff --git a/drivers/staging/media/atomisp/pci/isp/kernels/xnr/xnr_3.0/ia_css_xnr3.host.c b/drivers/staging/media/atomisp/pci/isp/kernels/xnr/xnr_3.0/ia_css_xnr3.host.c new file mode 100644 index 000000000000..a9db6366d20b --- /dev/null +++ b/drivers/staging/media/atomisp/pci/isp/kernels/xnr/xnr_3.0/ia_css_xnr3.host.c @@ -0,0 +1,248 @@ +/* + * Support for Intel Camera Imaging ISP subsystem. + * Copyright (c) 2015, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include "type_support.h" +#include "math_support.h" +#include "sh_css_defs.h" +#include "ia_css_types.h" +#include "assert_support.h" +#include "ia_css_xnr3.host.h" + +/* Maximum value for alpha on ISP interface */ +#define XNR_MAX_ALPHA ((1 << (ISP_VEC_ELEMBITS - 1)) - 1) + +/* Minimum value for sigma on host interface. Lower values translate to + * max_alpha. + */ +#define XNR_MIN_SIGMA (IA_CSS_XNR3_SIGMA_SCALE / 100) + +/* + * division look-up table + * Refers to XNR3.0.5 + */ +#define XNR3_LOOK_UP_TABLE_POINTS 16 + +static const s16 x[XNR3_LOOK_UP_TABLE_POINTS] = { + 1024, 1164, 1320, 1492, 1680, 1884, 2108, 2352, + 2616, 2900, 3208, 3540, 3896, 4276, 4684, 5120 +}; + +static const s16 a[XNR3_LOOK_UP_TABLE_POINTS] = { + -7213, -5580, -4371, -3421, -2722, -2159, -6950, -5585, + -4529, -3697, -3010, -2485, -2070, -1727, -1428, 0 + }; + +static const s16 b[XNR3_LOOK_UP_TABLE_POINTS] = { + 4096, 3603, 3178, 2811, 2497, 2226, 1990, 1783, + 1603, 1446, 1307, 1185, 1077, 981, 895, 819 +}; + +static const s16 c[XNR3_LOOK_UP_TABLE_POINTS] = { + 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 +}; + +/* + * Default kernel parameters. In general, default is bypass mode or as close + * to the ineffective values as possible. Due to the chroma down+upsampling, + * perfect bypass mode is not possible for xnr3 filter itself. Instead, the + * 'blending' parameter is used to create a bypass. + */ +const struct ia_css_xnr3_config default_xnr3_config = { + /* sigma */ + { 0, 0, 0, 0, 0, 0 }, + /* coring */ + { 0, 0, 0, 0 }, + /* blending */ + { 0 } +}; + +/* + * Compute an alpha value for the ISP kernel from sigma value on the host + * parameter interface as: alpha_scale * 1/(sigma/sigma_scale) + */ +static int32_t +compute_alpha(int sigma) +{ + s32 alpha; + int offset = sigma / 2; + + if (sigma < XNR_MIN_SIGMA) { + alpha = XNR_MAX_ALPHA; + } else { + alpha = ((IA_CSS_XNR3_SIGMA_SCALE * XNR_ALPHA_SCALE_FACTOR) + offset) / sigma; + + if (alpha > XNR_MAX_ALPHA) + alpha = XNR_MAX_ALPHA; + } + + return alpha; +} + +/* + * Compute the scaled coring value for the ISP kernel from the value on the + * host parameter interface. + */ +static int32_t +compute_coring(int coring) +{ + s32 isp_coring; + s32 isp_scale = XNR_CORING_SCALE_FACTOR; + s32 host_scale = IA_CSS_XNR3_CORING_SCALE; + s32 offset = host_scale / 2; /* fixed-point 0.5 */ + + /* Convert from public host-side scale factor to isp-side scale + * factor. Clip to [0, isp_scale-1). + */ + isp_coring = ((coring * isp_scale) + offset) / host_scale; + return min(max(isp_coring, 0), isp_scale - 1); +} + +/* + * Compute the scaled blending strength for the ISP kernel from the value on + * the host parameter interface. + */ +static int32_t +compute_blending(int strength) +{ + s32 isp_strength; + s32 isp_scale = XNR_BLENDING_SCALE_FACTOR; + s32 host_scale = IA_CSS_XNR3_BLENDING_SCALE; + s32 offset = host_scale / 2; /* fixed-point 0.5 */ + + /* Convert from public host-side scale factor to isp-side scale + * factor. The blending factor is positive on the host side, but + * negative on the ISP side because +1.0 cannot be represented + * exactly as s0.11 fixed point, but -1.0 can. + */ + isp_strength = -(((strength * isp_scale) + offset) / host_scale); + return MAX(MIN(isp_strength, 0), -XNR_BLENDING_SCALE_FACTOR); +} + +void +ia_css_xnr3_encode( + struct sh_css_isp_xnr3_params *to, + const struct ia_css_xnr3_config *from, + unsigned int size) +{ + int kernel_size = XNR_FILTER_SIZE; + /* The adjust factor is the next power of 2 + w.r.t. the kernel size*/ + int adjust_factor = ceil_pow2(kernel_size); + s32 max_diff = (1 << (ISP_VEC_ELEMBITS - 1)) - 1; + s32 min_diff = -(1 << (ISP_VEC_ELEMBITS - 1)); + + s32 alpha_y0 = compute_alpha(from->sigma.y0); + s32 alpha_y1 = compute_alpha(from->sigma.y1); + s32 alpha_u0 = compute_alpha(from->sigma.u0); + s32 alpha_u1 = compute_alpha(from->sigma.u1); + s32 alpha_v0 = compute_alpha(from->sigma.v0); + s32 alpha_v1 = compute_alpha(from->sigma.v1); + s32 alpha_ydiff = (alpha_y1 - alpha_y0) * adjust_factor / kernel_size; + s32 alpha_udiff = (alpha_u1 - alpha_u0) * adjust_factor / kernel_size; + s32 alpha_vdiff = (alpha_v1 - alpha_v0) * adjust_factor / kernel_size; + + s32 coring_u0 = compute_coring(from->coring.u0); + s32 coring_u1 = compute_coring(from->coring.u1); + s32 coring_v0 = compute_coring(from->coring.v0); + s32 coring_v1 = compute_coring(from->coring.v1); + s32 coring_udiff = (coring_u1 - coring_u0) * adjust_factor / kernel_size; + s32 coring_vdiff = (coring_v1 - coring_v0) * adjust_factor / kernel_size; + + s32 blending = compute_blending(from->blending.strength); + + (void)size; + + /* alpha's are represented in qN.5 format */ + to->alpha.y0 = alpha_y0; + to->alpha.u0 = alpha_u0; + to->alpha.v0 = alpha_v0; + to->alpha.ydiff = min(max(alpha_ydiff, min_diff), max_diff); + to->alpha.udiff = min(max(alpha_udiff, min_diff), max_diff); + to->alpha.vdiff = min(max(alpha_vdiff, min_diff), max_diff); + + /* coring parameters are expressed in q1.NN format */ + to->coring.u0 = coring_u0; + to->coring.v0 = coring_v0; + to->coring.udiff = min(max(coring_udiff, min_diff), max_diff); + to->coring.vdiff = min(max(coring_vdiff, min_diff), max_diff); + + /* blending strength is expressed in q1.NN format */ + to->blending.strength = blending; +} + +/* ISP2401 */ +/* (void) = ia_css_xnr3_vmem_encode(*to, *from) + * ----------------------------------------------- + * VMEM Encode Function to translate UV parameters from userspace into ISP space +*/ +void +ia_css_xnr3_vmem_encode( + struct sh_css_isp_xnr3_vmem_params *to, + const struct ia_css_xnr3_config *from, + unsigned int size) +{ + unsigned int i, j, base; + const unsigned int total_blocks = 4; + const unsigned int shuffle_block = 16; + + (void)from; + (void)size; + + /* Init */ + for (i = 0; i < ISP_VEC_NELEMS; i++) { + to->x[0][i] = 0; + to->a[0][i] = 0; + to->b[0][i] = 0; + to->c[0][i] = 0; + } + + /* Constraints on "x": + * - values should be greater or equal to 0. + * - values should be ascending. + */ + assert(x[0] >= 0); + + for (j = 1; j < XNR3_LOOK_UP_TABLE_POINTS; j++) { + assert(x[j] >= 0); + assert(x[j] > x[j - 1]); + } + + /* The implementation of the calulating 1/x is based on the availability + * of the OP_vec_shuffle16 operation. + * A 64 element vector is split up in 4 blocks of 16 element. Each array is copied to + * a vector 4 times, (starting at 0, 16, 32 and 48). All array elements are copied or + * initialised as described in the KFS. The remaining elements of a vector are set to 0. + */ + /* TODO: guard this code with above assumptions */ + for (i = 0; i < total_blocks; i++) { + base = shuffle_block * i; + + for (j = 0; j < XNR3_LOOK_UP_TABLE_POINTS; j++) { + to->x[0][base + j] = x[j]; + to->a[0][base + j] = a[j]; + to->b[0][base + j] = b[j]; + to->c[0][base + j] = c[j]; + } + } +} + +/* Dummy Function added as the tool expects it*/ +void +ia_css_xnr3_debug_dtrace( + const struct ia_css_xnr3_config *config, + unsigned int level) +{ + (void)config; + (void)level; +} diff --git a/drivers/staging/media/atomisp/pci/isp/kernels/xnr/xnr_3.0/ia_css_xnr3.host.h b/drivers/staging/media/atomisp/pci/isp/kernels/xnr/xnr_3.0/ia_css_xnr3.host.h new file mode 100644 index 000000000000..959533ec29c6 --- /dev/null +++ b/drivers/staging/media/atomisp/pci/isp/kernels/xnr/xnr_3.0/ia_css_xnr3.host.h @@ -0,0 +1,41 @@ +/* + * Support for Intel Camera Imaging ISP subsystem. + * Copyright (c) 2015, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#ifndef __IA_CSS_XNR3_HOST_H +#define __IA_CSS_XNR3_HOST_H + +#include "ia_css_xnr3_param.h" +#include "ia_css_xnr3_types.h" + +extern const struct ia_css_xnr3_config default_xnr3_config; + +void +ia_css_xnr3_encode( + struct sh_css_isp_xnr3_params *to, + const struct ia_css_xnr3_config *from, + unsigned int size); + +/* ISP2401 */ +void +ia_css_xnr3_vmem_encode( + struct sh_css_isp_xnr3_vmem_params *to, + const struct ia_css_xnr3_config *from, + unsigned int size); + +void +ia_css_xnr3_debug_dtrace( + const struct ia_css_xnr3_config *config, + unsigned int level); + +#endif /* __IA_CSS_XNR3_HOST_H */ diff --git a/drivers/staging/media/atomisp/pci/isp/kernels/xnr/xnr_3.0/ia_css_xnr3_param.h b/drivers/staging/media/atomisp/pci/isp/kernels/xnr/xnr_3.0/ia_css_xnr3_param.h new file mode 100644 index 000000000000..7d108669e19a --- /dev/null +++ b/drivers/staging/media/atomisp/pci/isp/kernels/xnr/xnr_3.0/ia_css_xnr3_param.h @@ -0,0 +1,83 @@ +/* + * Support for Intel Camera Imaging ISP subsystem. + * Copyright (c) 2015, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#ifndef __IA_CSS_XNR3_PARAM_H +#define __IA_CSS_XNR3_PARAM_H + +#include "type_support.h" +#include "vmem.h" /* ISP2401: needed for VMEM_ARRAY */ + +/* Scaling factor of the alpha values: which fixed-point value represents 1.0? + * It must be chosen such that 1/min_sigma still fits in an ISP vector + * element. */ +#define XNR_ALPHA_SCALE_LOG2 5 +#define XNR_ALPHA_SCALE_FACTOR BIT(XNR_ALPHA_SCALE_LOG2) + +/* Scaling factor of the coring values on the ISP. */ +#define XNR_CORING_SCALE_LOG2 (ISP_VEC_ELEMBITS - 1) +#define XNR_CORING_SCALE_FACTOR BIT(XNR_CORING_SCALE_LOG2) + +/* Scaling factor of the blending strength on the ISP. */ +#define XNR_BLENDING_SCALE_LOG2 (ISP_VEC_ELEMBITS - 1) +#define XNR_BLENDING_SCALE_FACTOR BIT(XNR_BLENDING_SCALE_LOG2) + +/* XNR3 filter size. Must be 11x11, 9x9 or 5x5. */ +#define XNR_FILTER_SIZE 5 + +/* XNR3 alpha (1/sigma) parameters on the ISP, expressed as a base (0) value + * for dark areas, and a scaled diff towards the value for bright areas. */ +struct sh_css_xnr3_alpha_params { + s32 y0; + s32 u0; + s32 v0; + s32 ydiff; + s32 udiff; + s32 vdiff; +}; + +/* XNR3 coring parameters on the ISP, expressed as a base (0) value + * for dark areas, and a scaled diff towards the value for bright areas. */ +struct sh_css_xnr3_coring_params { + s32 u0; + s32 v0; + s32 udiff; + s32 vdiff; +}; + +/* XNR3 blending strength on the ISP. */ +struct sh_css_xnr3_blending_params { + s32 strength; +}; + +/* XNR3 ISP parameters */ +struct sh_css_isp_xnr3_params { + struct sh_css_xnr3_alpha_params alpha; + struct sh_css_xnr3_coring_params coring; + struct sh_css_xnr3_blending_params blending; +}; + +/* ISP2401 */ +/* + * STRUCT sh_css_isp_xnr3_vmem_params + * ----------------------------------------------- + * ISP VMEM parameters + */ +struct sh_css_isp_xnr3_vmem_params { + VMEM_ARRAY(x, ISP_VEC_NELEMS); + VMEM_ARRAY(a, ISP_VEC_NELEMS); + VMEM_ARRAY(b, ISP_VEC_NELEMS); + VMEM_ARRAY(c, ISP_VEC_NELEMS); +}; + +#endif /*__IA_CSS_XNR3_PARAM_H */ diff --git a/drivers/staging/media/atomisp/pci/isp/kernels/xnr/xnr_3.0/ia_css_xnr3_types.h b/drivers/staging/media/atomisp/pci/isp/kernels/xnr/xnr_3.0/ia_css_xnr3_types.h new file mode 100644 index 000000000000..6963bef3c07d --- /dev/null +++ b/drivers/staging/media/atomisp/pci/isp/kernels/xnr/xnr_3.0/ia_css_xnr3_types.h @@ -0,0 +1,97 @@ +/* + * Support for Intel Camera Imaging ISP subsystem. + * Copyright (c) 2015, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#ifndef __IA_CSS_XNR3_TYPES_H +#define __IA_CSS_XNR3_TYPES_H + +/* @file +* CSS-API header file for Extra Noise Reduction (XNR) parameters. +*/ + +/** + * \brief Scale of the XNR sigma parameters. + * \details The define specifies which fixed-point value represents 1.0. + */ +#define IA_CSS_XNR3_SIGMA_SCALE BIT(10) + +/** + * \brief Scale of the XNR coring parameters. + * \details The define specifies which fixed-point value represents 1.0. + */ +#define IA_CSS_XNR3_CORING_SCALE BIT(15) + +/** + * \brief Scale of the XNR blending parameter. + * \details The define specifies which fixed-point value represents 1.0. + */ +#define IA_CSS_XNR3_BLENDING_SCALE BIT(11) + +/** + * \brief XNR3 Sigma Parameters. + * \details Sigma parameters define the strength of the XNR filter. + * A higher number means stronger filtering. There are two values for each of + * the three YUV planes: one for dark areas and one for bright areas. All + * sigma parameters are fixed-point values between 0.0 and 1.0, scaled with + * IA_CSS_XNR3_SIGMA_SCALE. + */ +struct ia_css_xnr3_sigma_params { + int y0; /** Sigma for Y range similarity in dark area */ + int y1; /** Sigma for Y range similarity in bright area */ + int u0; /** Sigma for U range similarity in dark area */ + int u1; /** Sigma for U range similarity in bright area */ + int v0; /** Sigma for V range similarity in dark area */ + int v1; /** Sigma for V range similarity in bright area */ +}; + +/** + * \brief XNR3 Coring Parameters + * \details Coring parameters define the "coring" strength, which is a soft + * thresholding technique to avoid false coloring. There are two values for + * each of the two chroma planes: one for dark areas and one for bright areas. + * All coring parameters are fixed-point values between 0.0 and 1.0, scaled + * with IA_CSS_XNR3_CORING_SCALE. The ineffective value is 0. + */ +struct ia_css_xnr3_coring_params { + int u0; /** Coring threshold of U channel in dark area */ + int u1; /** Coring threshold of U channel in bright area */ + int v0; /** Coring threshold of V channel in dark area */ + int v1; /** Coring threshold of V channel in bright area */ +}; + +/** + * \brief XNR3 Blending Parameters + * \details Blending parameters define the blending strength of filtered + * output pixels with the original chroma pixels from before xnr3. The + * blending strength is a fixed-point value between 0.0 and 1.0 (inclusive), + * scaled with IA_CSS_XNR3_BLENDING_SCALE. + * A higher number applies xnr filtering more strongly. A value of 1.0 + * disables the blending and returns the xnr3 filtered output, while a + * value of 0.0 bypasses the entire xnr3 filter. + */ +struct ia_css_xnr3_blending_params { + int strength; /** Blending strength */ +}; + +/** + * \brief XNR3 public parameters. + * \details Struct with all parameters for the XNR3 kernel that can be set + * from the CSS API. + */ +struct ia_css_xnr3_config { + struct ia_css_xnr3_sigma_params sigma; /** XNR3 sigma parameters */ + struct ia_css_xnr3_coring_params coring; /** XNR3 coring parameters */ + struct ia_css_xnr3_blending_params blending; /** XNR3 blending parameters */ +}; + +#endif /* __IA_CSS_XNR3_TYPES_H */ |