drivers/staging/media/atomisp/pci/camera/util/src/util.c

Source file repositories/reference/linux-study-clean/drivers/staging/media/atomisp/pci/camera/util/src/util.c

File Facts

System
Linux kernel
Corpus path
drivers/staging/media/atomisp/pci/camera/util/src/util.c
Extension
.c
Size
4412 bytes
Lines
186
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) 2015, Intel Corporation.
 */

#include "ia_css_util.h"
#include <ia_css_frame.h>
#include <assert_support.h>
#include <math_support.h>

/* for ia_css_binary_max_vf_width() */
#include "ia_css_binary.h"

/* MW: Table look-up ??? */
unsigned int ia_css_util_input_format_bpp(
    enum atomisp_input_format format,
    bool two_ppc)
{
	unsigned int rval = 0;

	switch (format) {
	case ATOMISP_INPUT_FORMAT_YUV420_8_LEGACY:
	case ATOMISP_INPUT_FORMAT_YUV420_8:
	case ATOMISP_INPUT_FORMAT_YUV422_8:
	case ATOMISP_INPUT_FORMAT_RGB_888:
	case ATOMISP_INPUT_FORMAT_RAW_8:
	case ATOMISP_INPUT_FORMAT_BINARY_8:
	case ATOMISP_INPUT_FORMAT_EMBEDDED:
		rval = 8;
		break;
	case ATOMISP_INPUT_FORMAT_YUV420_10:
	case ATOMISP_INPUT_FORMAT_YUV422_10:
	case ATOMISP_INPUT_FORMAT_RAW_10:
		rval = 10;
		break;
	case ATOMISP_INPUT_FORMAT_YUV420_16:
	case ATOMISP_INPUT_FORMAT_YUV422_16:
		rval = 16;
		break;
	case ATOMISP_INPUT_FORMAT_RGB_444:
		rval = 4;
		break;
	case ATOMISP_INPUT_FORMAT_RGB_555:
		rval = 5;
		break;
	case ATOMISP_INPUT_FORMAT_RGB_565:
		rval = 65;
		break;
	case ATOMISP_INPUT_FORMAT_RGB_666:
	case ATOMISP_INPUT_FORMAT_RAW_6:
		rval = 6;
		break;
	case ATOMISP_INPUT_FORMAT_RAW_7:
		rval = 7;
		break;
	case ATOMISP_INPUT_FORMAT_RAW_12:
		rval = 12;
		break;
	case ATOMISP_INPUT_FORMAT_RAW_14:
		if (two_ppc)
			rval = 14;
		else
			rval = 12;
		break;
	case ATOMISP_INPUT_FORMAT_RAW_16:
		if (two_ppc)
			rval = 16;
		else
			rval = 12;
		break;
	default:
		rval = 0;
		break;
	}
	return rval;
}

int ia_css_util_check_vf_info(
    const struct ia_css_frame_info *const info)
{
	int err;
	unsigned int max_vf_width;

	assert(info);
	err = ia_css_frame_check_info(info);
	if (err)
		return err;
	max_vf_width = ia_css_binary_max_vf_width();
	if (max_vf_width != 0 && info->res.width > max_vf_width * 2)

Annotation

Implementation Notes