drivers/staging/media/atomisp/pci/isp/kernels/ipu2_io_ls/yuv444_io_ls/ia_css_yuv444_io.host.c

Source file repositories/reference/linux-study-clean/drivers/staging/media/atomisp/pci/isp/kernels/ipu2_io_ls/yuv444_io_ls/ia_css_yuv444_io.host.c

File Facts

System
Linux kernel
Corpus path
drivers/staging/media/atomisp/pci/isp/kernels/ipu2_io_ls/yuv444_io_ls/ia_css_yuv444_io.host.c
Extension
.c
Size
2921 bytes
Lines
92
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.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
Support for Intel Camera Imaging ISP subsystem.
Copyright (c) 2010 - 2015, Intel Corporation.

*/

#include <linux/bitops.h>
#include <linux/math.h>

#include "ia_css_yuv444_io.host.h"
#include "dma.h"
#ifndef IA_CSS_NO_DEBUG
#include "ia_css_debug.h"
#endif
#include "ia_css_isp_params.h"
#include "ia_css_frame.h"

int ia_css_yuv444_io_config(const struct ia_css_binary      *binary,
			    const struct sh_css_binary_args *args)
{
	const struct ia_css_frame *in_frame = args->in_frame;
	const struct ia_css_frame **out_frames = (const struct ia_css_frame **)
		&args->out_frame;
	const struct ia_css_frame_info *in_frame_info = ia_css_frame_get_info(in_frame);
	const unsigned int ddr_elems_per_word =
		DIV_ROUND_UP(HIVE_ISP_DDR_WORD_BITS, BITS_PER_TYPE(short));
	unsigned int size_get = 0, size_put = 0;
	unsigned int offset = 0;
	int ret;

	if (binary->info->mem_offsets.offsets.param) {
		size_get = binary->info->mem_offsets.offsets.param->dmem.get.size;
		offset = binary->info->mem_offsets.offsets.param->dmem.get.offset;
	}

	if (size_get) {
		struct ia_css_common_io_config *to = (struct ia_css_common_io_config *)
						     &binary->mem_params.params[IA_CSS_PARAM_CLASS_PARAM][IA_CSS_ISP_DMEM].address[offset];
		struct dma_port_config config;
#ifndef IA_CSS_NO_DEBUG
		ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE_PRIVATE,
				    "ia_css_yuv444_io_config() get part enter:\n");
#endif

		ret = ia_css_dma_configure_from_info(&config, in_frame_info);
		if (ret)
			return ret;

		// The base_address of the input frame will be set in the ISP
		to->width = in_frame_info->res.width;
		to->height = in_frame_info->res.height;
		to->stride = config.stride;
		to->ddr_elems_per_word = ddr_elems_per_word;
#ifndef IA_CSS_NO_DEBUG
		ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE_PRIVATE,
				    "ia_css_yuv444_io_config() get part leave:\n");
#endif
	}

	if (binary->info->mem_offsets.offsets.param) {
		size_put = binary->info->mem_offsets.offsets.param->dmem.put.size;
		offset = binary->info->mem_offsets.offsets.param->dmem.put.offset;
	}

	if (size_put) {
		struct ia_css_common_io_config *to = (struct ia_css_common_io_config *)
						     &binary->mem_params.params[IA_CSS_PARAM_CLASS_PARAM][IA_CSS_ISP_DMEM].address[offset];
		struct dma_port_config config;
#ifndef IA_CSS_NO_DEBUG
		ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE_PRIVATE,
				    "ia_css_yuv444_io_config() put part enter:\n");
#endif

		ret = ia_css_dma_configure_from_info(&config, &out_frames[0]->frame_info);
		if (ret)
			return ret;

		to->base_address = out_frames[0]->data;
		to->width = out_frames[0]->frame_info.res.width;
		to->height = out_frames[0]->frame_info.res.height;
		to->stride = config.stride;
		to->ddr_elems_per_word = ddr_elems_per_word;

#ifndef IA_CSS_NO_DEBUG
		ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE_PRIVATE,
				    "ia_css_yuv444_io_config() put part leave:\n");
#endif
	}
	return 0;

Annotation

Implementation Notes