drivers/staging/media/atomisp/pci/isp/kernels/fpn/fpn_1.0/ia_css_fpn.host.c
Source file repositories/reference/linux-study-clean/drivers/staging/media/atomisp/pci/isp/kernels/fpn/fpn_1.0/ia_css_fpn.host.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/staging/media/atomisp/pci/isp/kernels/fpn/fpn_1.0/ia_css_fpn.host.c- Extension
.c- Size
- 2181 bytes
- Lines
- 86
- Domain
- Driver Families
- Bucket
- drivers/staging
- 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.
- 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.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/math.hassert_support.hia_css_frame_public.hia_css_frame.hia_css_binary.hia_css_types.hsh_css_defs.hia_css_debug.hia_css_isp_configs.hisp.hia_css_fpn.host.h
Detected Declarations
function Copyrightfunction ia_css_fpn_dumpfunction ia_css_fpn_configfunction ia_css_fpn_configure
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0
/*
* Support for Intel Camera Imaging ISP subsystem.
* Copyright (c) 2015, Intel Corporation.
*/
#include <linux/math.h>
#include <assert_support.h>
#include <ia_css_frame_public.h>
#include <ia_css_frame.h>
#include <ia_css_binary.h>
#include <ia_css_types.h>
#include <sh_css_defs.h>
#include <ia_css_debug.h>
#define IA_CSS_INCLUDE_CONFIGURATIONS
#include "ia_css_isp_configs.h"
#include "isp.h"
#include "ia_css_fpn.host.h"
void
ia_css_fpn_encode(
struct sh_css_isp_fpn_params *to,
const struct ia_css_fpn_table *from,
unsigned int size)
{
(void)size;
to->shift = from->shift;
to->enabled = from->data != NULL;
}
void
ia_css_fpn_dump(
const struct sh_css_isp_fpn_params *fpn,
unsigned int level)
{
if (!fpn)
return;
ia_css_debug_dtrace(level, "Fixed Pattern Noise Reduction:\n");
ia_css_debug_dtrace(level, "\t%-32s = %d\n",
"fpn_shift", fpn->shift);
ia_css_debug_dtrace(level, "\t%-32s = %d\n",
"fpn_enabled", fpn->enabled);
}
int ia_css_fpn_config(struct sh_css_isp_fpn_isp_config *to,
const struct ia_css_fpn_configuration *from,
unsigned int size)
{
unsigned int elems_a = ISP_VEC_NELEMS;
int ret;
ret = ia_css_dma_configure_from_info(&to->port_b, from->info);
if (ret)
return ret;
to->width_a_over_b = elems_a / to->port_b.elems;
/* Assume divisiblity here, may need to generalize to fixed point. */
if (elems_a % to->port_b.elems != 0)
return -EINVAL;
return 0;
}
int ia_css_fpn_configure(const struct ia_css_binary *binary,
const struct ia_css_frame_info *info)
{
struct ia_css_frame_info my_info = IA_CSS_BINARY_DEFAULT_FRAME_INFO;
const struct ia_css_fpn_configuration config = {
&my_info
};
my_info.res.width = DIV_ROUND_UP(info->res.width, 2); /* Packed by 2x */
my_info.res.height = info->res.height;
my_info.padded_width = DIV_ROUND_UP(info->padded_width, 2); /* Packed by 2x */
my_info.format = info->format;
my_info.raw_bit_depth = FPN_BITS_PER_PIXEL;
my_info.raw_bayer_order = info->raw_bayer_order;
my_info.crop_info = info->crop_info;
return ia_css_configure_fpn(binary, &config);
}
Annotation
- Immediate include surface: `linux/math.h`, `assert_support.h`, `ia_css_frame_public.h`, `ia_css_frame.h`, `ia_css_binary.h`, `ia_css_types.h`, `sh_css_defs.h`, `ia_css_debug.h`.
- Detected declarations: `function Copyright`, `function ia_css_fpn_dump`, `function ia_css_fpn_config`, `function ia_css_fpn_configure`.
- Atlas domain: Driver Families / drivers/staging.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.