text: #ifndef ISP2401
  /*
   * 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.
   */
  #else
  /**
  Support for Intel Camera Imaging ISP subsystem.
  Copyright (c) 2010 - 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.
  */
  #endif
  
  #include "system_global.h"
  
  #ifdef USE_INPUT_SYSTEM_VERSION_2401
  
  #include "ia_css_isys.h"
  #include "ia_css_debug.h"
  #include "math_support.h"
  #include "string_support.h"
  #include "virtual_isys.h"
  #include "isp.h"
  #include "sh_css_defs.h"
  
  /*************************************************
   *
   * Forwarded Declaration
   *
   *************************************************/
  #ifndef ISP2401
  
  #endif
  static bool create_input_system_channel(
  	input_system_cfg_t	*cfg,
  	bool			metadata,
  	input_system_channel_t	*channel);
  
  static void destroy_input_system_channel(
  	input_system_channel_t	*channel);
  
  static bool create_input_system_input_port(
  	input_system_cfg_t		*cfg,
  	input_system_input_port_t	*input_port);
  
  static void destroy_input_system_input_port(
  	input_system_input_port_t	*input_port);
  
  static bool calculate_input_system_channel_cfg(
  	input_system_channel_t		*channel,
  	input_system_input_port_t	*input_port,
  	input_system_cfg_t		*isys_cfg,
  	input_system_channel_cfg_t	*channel_cfg,
  	bool metadata);
  
  static bool calculate_input_system_input_port_cfg(
  	input_system_channel_t		*channel,
  	input_system_input_port_t	*input_port,
  	input_system_cfg_t		*isys_cfg,
  	input_system_input_port_cfg_t	*input_port_cfg);
  
  static bool acquire_sid(
  	stream2mmio_ID_t	stream2mmio,
  	stream2mmio_sid_ID_t	*sid);
  
  static void release_sid(
  	stream2mmio_ID_t	stream2mmio,
  	stream2mmio_sid_ID_t	*sid);
  
  static bool acquire_ib_buffer(
  	int32_t bits_per_pixel,
  	int32_t pixels_per_line,
  	int32_t lines_per_frame,
  	int32_t align_in_bytes,
  	bool online,
  	ib_buffer_t *buf);
  
  static void release_ib_buffer(
  	ib_buffer_t *buf);
  
  static bool acquire_dma_channel(
  	isys2401_dma_ID_t	dma_id,
  	isys2401_dma_channel	*channel);
  
  static void release_dma_channel(
  	isys2401_dma_ID_t	dma_id,
  	isys2401_dma_channel	*channel);
  
  static bool acquire_be_lut_entry(
  	csi_rx_backend_ID_t		backend,
  	csi_mipi_packet_type_t		packet_type,
  	csi_rx_backend_lut_entry_t	*entry);
  
  static void release_be_lut_entry(
  	csi_rx_backend_ID_t		backend,
  	csi_mipi_packet_type_t		packet_type,
  	csi_rx_backend_lut_entry_t	*entry);
  
  static bool calculate_tpg_cfg(
  	input_system_channel_t		*channel,
  	input_system_input_port_t	*input_port,
  	input_system_cfg_t		*isys_cfg,
  	pixelgen_tpg_cfg_t		*cfg);
  
  static bool calculate_prbs_cfg(
  	input_system_channel_t		*channel,
  	input_system_input_port_t	*input_port,
  	input_system_cfg_t		*isys_cfg,
  	pixelgen_prbs_cfg_t		*cfg);
  
  static bool calculate_fe_cfg(
  	const input_system_cfg_t	*isys_cfg,
  	csi_rx_frontend_cfg_t		*cfg);
  
  static bool calculate_be_cfg(
  	const input_system_input_port_t	*input_port,
  	const input_system_cfg_t	*isys_cfg,
  	bool				metadata,
  	csi_rx_backend_cfg_t		*cfg);
  
  static bool calculate_stream2mmio_cfg(
  	const input_system_cfg_t	*isys_cfg,
  	bool				metadata,
  	stream2mmio_cfg_t		*cfg);
  
  static bool calculate_ibuf_ctrl_cfg(
  	const input_system_channel_t	*channel,
  	const input_system_input_port_t	*input_port,
  	const input_system_cfg_t	*isys_cfg,
  	ibuf_ctrl_cfg_t			*cfg);
  
  static bool calculate_isys2401_dma_cfg(
  	const input_system_channel_t	*channel,
  	const input_system_cfg_t	*isys_cfg,
  	isys2401_dma_cfg_t		*cfg);
  
  static bool calculate_isys2401_dma_port_cfg(
  	const input_system_cfg_t	*isys_cfg,
  	bool				raw_packed,
  	bool				metadata,
  	isys2401_dma_port_cfg_t		*cfg);
  
  static csi_mipi_packet_type_t get_csi_mipi_packet_type(
  	int32_t data_type);
  
  static int32_t calculate_stride(
  	int32_t bits_per_pixel,
  	int32_t pixels_per_line,
  	bool	raw_packed,
  	int32_t	align_in_bytes);
  
  /** end of Forwarded Declaration */
  
  /**************************************************
   *
   * Public Methods
   *
   **************************************************/
  ia_css_isys_error_t ia_css_isys_stream_create(
  	ia_css_isys_descr_t	*isys_stream_descr,
  	ia_css_isys_stream_h	isys_stream,
  	uint32_t isys_stream_id)
  {
  	ia_css_isys_error_t rc;
  
  	if (isys_stream_descr == NULL || isys_stream == NULL ||
  		isys_stream_id >= SH_CSS_MAX_ISYS_CHANNEL_NODES)
  		return	false;
  
  	ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE_PRIVATE,
  		"ia_css_isys_stream_create() enter:\n");
  
  	/*Reset isys_stream to 0*/
  	memset(isys_stream, 0, sizeof(*isys_stream));
  	isys_stream->enable_metadata = isys_stream_descr->metadata.enable;
  	isys_stream->id = isys_stream_id;
  
  	isys_stream->linked_isys_stream_id = isys_stream_descr->linked_isys_stream_id;
  	rc = create_input_system_input_port(isys_stream_descr, &(isys_stream->input_port));
  	if (rc == false)
  		return false;
  
  	rc = create_input_system_channel(isys_stream_descr, false, &(isys_stream->channel));
  	if (rc == false) {
  		destroy_input_system_input_port(&isys_stream->input_port);
  		return false;
  	}
  
  #ifdef ISP2401
  	/*
  	 * Early polling is required for timestamp accuracy in certain cause.
  	 * The ISYS HW polling is started on
  	 * ia_css_isys_stream_capture_indication() instead of
  	 * ia_css_pipeline_sp_wait_for_isys_stream_N() as isp processing of
  	 * capture takes longer than getting an ISYS frame
  	 */
  	isys_stream->polling_mode = isys_stream_descr->polling_mode;
  
  #endif
  	/* create metadata channel */
  	if (isys_stream_descr->metadata.enable) {
  		rc = create_input_system_channel(isys_stream_descr, true, &isys_stream->md_channel);
  		if (rc == false) {
  			destroy_input_system_input_port(&isys_stream->input_port);
  			destroy_input_system_channel(&isys_stream->channel);
  			return false;
  		}
  	}
  	ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE_PRIVATE,
  		"ia_css_isys_stream_create() leave:\n");
  
  	return true;
  }
  
  void ia_css_isys_stream_destroy(
  	ia_css_isys_stream_h	isys_stream)
  {
  	destroy_input_system_input_port(&isys_stream->input_port);
  	destroy_input_system_channel(&(isys_stream->channel));
  	if (isys_stream->enable_metadata) {
  		/* Destroy metadata channel only if its allocated*/
  		destroy_input_system_channel(&isys_stream->md_channel);
  	}
  }
  
  ia_css_isys_error_t ia_css_isys_stream_calculate_cfg(
  	ia_css_isys_stream_h		isys_stream,
  	ia_css_isys_descr_t		*isys_stream_descr,
  	ia_css_isys_stream_cfg_t	*isys_stream_cfg)
  {
  	ia_css_isys_error_t rc;
  
  	if (isys_stream_cfg == NULL		||
  		isys_stream_descr == NULL	||
  		isys_stream == NULL)
  		return false;
  
  	ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE_PRIVATE,
  		"ia_css_isys_stream_calculate_cfg() enter:\n");
  
  	rc  = calculate_input_system_channel_cfg(
  			&(isys_stream->channel),
  			&(isys_stream->input_port),
  			isys_stream_descr,
  			&(isys_stream_cfg->channel_cfg),
  			false);
  	if (rc == false)
  		return false;
  
  	/* configure metadata channel */
  	if (isys_stream_descr->metadata.enable) {
  		isys_stream_cfg->enable_metadata = true;
  		rc  = calculate_input_system_channel_cfg(
  				&isys_stream->md_channel,
  				&isys_stream->input_port,
  				isys_stream_descr,
  				&isys_stream_cfg->md_channel_cfg,
  				true);
  		if (rc == false)
  			return false;
  	}
  
  	rc = calculate_input_system_input_port_cfg(
  			&(isys_stream->channel),
  			&(isys_stream->input_port),
  			isys_stream_descr,
  			&(isys_stream_cfg->input_port_cfg));
  	if (rc == false)
  		return false;
  
  	isys_stream->valid = 1;
  	isys_stream_cfg->valid = 1;
  	ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE_PRIVATE,
  		"ia_css_isys_stream_calculate_cfg() leave:\n");
  	return rc;
  }
  
  /** end of Public Methods */
  
  /**************************************************
   *
   * Private Methods
   *
   **************************************************/
  static bool create_input_system_channel(
  	input_system_cfg_t	*cfg,
  	bool			metadata,
  	input_system_channel_t	*me)
  {
  	bool rc = true;
  
  	me->dma_id = ISYS2401_DMA0_ID;
  
  	switch (cfg->input_port_id) {
  	case INPUT_SYSTEM_CSI_PORT0_ID:
  	case INPUT_SYSTEM_PIXELGEN_PORT0_ID:
  		me->stream2mmio_id = STREAM2MMIO0_ID;
  		me->ibuf_ctrl_id = IBUF_CTRL0_ID;
  		break;
  
  	case INPUT_SYSTEM_CSI_PORT1_ID:
  	case INPUT_SYSTEM_PIXELGEN_PORT1_ID:
  		me->stream2mmio_id = STREAM2MMIO1_ID;
  		me->ibuf_ctrl_id = IBUF_CTRL1_ID;
  		break;
  
  	case INPUT_SYSTEM_CSI_PORT2_ID:
  	case INPUT_SYSTEM_PIXELGEN_PORT2_ID:
  		me->stream2mmio_id = STREAM2MMIO2_ID;
  		me->ibuf_ctrl_id = IBUF_CTRL2_ID;
  		break;
  	default:
  		rc = false;
  		break;
  	}
  
  	if (rc == false)
  		return false;
  
  	if (!acquire_sid(me->stream2mmio_id, &(me->stream2mmio_sid_id))) {
  		return false;
  	}
  
  	if (!acquire_ib_buffer(
  			metadata ? cfg->metadata.bits_per_pixel : cfg->input_port_resolution.bits_per_pixel,
  			metadata ? cfg->metadata.pixels_per_line : cfg->input_port_resolution.pixels_per_line,
  			metadata ? cfg->metadata.lines_per_frame : cfg->input_port_resolution.lines_per_frame,
  			metadata ? cfg->metadata.align_req_in_bytes : cfg->input_port_resolution.align_req_in_bytes,
  			cfg->online,
  			&(me->ib_buffer))) {
  		release_sid(me->stream2mmio_id, &(me->stream2mmio_sid_id));
  		return false;
  	}
  
  	if (!acquire_dma_channel(me->dma_id, &(me->dma_channel))) {
  		release_sid(me->stream2mmio_id, &(me->stream2mmio_sid_id));
  		release_ib_buffer(&(me->ib_buffer));
  		return false;
  	}
  
  	return true;
  }
  
  static void destroy_input_system_channel(
  	input_system_channel_t	*me)
  {
  	release_sid(me->stream2mmio_id,
  		&(me->stream2mmio_sid_id));
  
  	release_ib_buffer(&(me->ib_buffer));
  
  	release_dma_channel(me->dma_id, &(me->dma_channel));
  }
  
  static bool create_input_system_input_port(
  	input_system_cfg_t		*cfg,
  	input_system_input_port_t	*me)
  {
  	csi_mipi_packet_type_t packet_type;
  	bool rc = true;
  
  	switch (cfg->input_port_id) {
  	case INPUT_SYSTEM_CSI_PORT0_ID:
  		me->csi_rx.frontend_id = CSI_RX_FRONTEND0_ID;
  		me->csi_rx.backend_id = CSI_RX_BACKEND0_ID;
  
  		packet_type = get_csi_mipi_packet_type(cfg->csi_port_attr.fmt_type);
  		me->csi_rx.packet_type = packet_type;
  
  		rc = acquire_be_lut_entry(
  				me->csi_rx.backend_id,
  				packet_type,
  				&(me->csi_rx.backend_lut_entry));
  		break;
  	case INPUT_SYSTEM_PIXELGEN_PORT0_ID:
  		me->pixelgen.pixelgen_id = PIXELGEN0_ID;
  		break;
  	case INPUT_SYSTEM_CSI_PORT1_ID:
  		me->csi_rx.frontend_id = CSI_RX_FRONTEND1_ID;
  		me->csi_rx.backend_id = CSI_RX_BACKEND1_ID;
  
  		packet_type = get_csi_mipi_packet_type(cfg->csi_port_attr.fmt_type);
  		me->csi_rx.packet_type = packet_type;
  
  		rc = acquire_be_lut_entry(
  				me->csi_rx.backend_id,
  				packet_type,
  				&(me->csi_rx.backend_lut_entry));
  		break;
  	case INPUT_SYSTEM_PIXELGEN_PORT1_ID:
  		me->pixelgen.pixelgen_id = PIXELGEN1_ID;
  
  		break;
  	case INPUT_SYSTEM_CSI_PORT2_ID:
  		me->csi_rx.frontend_id = CSI_RX_FRONTEND2_ID;
  		me->csi_rx.backend_id = CSI_RX_BACKEND2_ID;
  
  		packet_type = get_csi_mipi_packet_type(cfg->csi_port_attr.fmt_type);
  		me->csi_rx.packet_type = packet_type;
  
  		rc = acquire_be_lut_entry(
  				me->csi_rx.backend_id,
  				packet_type,
  				&(me->csi_rx.backend_lut_entry));
  		break;
  	case INPUT_SYSTEM_PIXELGEN_PORT2_ID:
  		me->pixelgen.pixelgen_id = PIXELGEN2_ID;
  		break;
  	default:
  		rc = false;
  		break;
  	}
  
  	me->source_type = cfg->mode;
  
  	/* for metadata */
  	me->metadata.packet_type = CSI_MIPI_PACKET_TYPE_UNDEFINED;
  	if (rc && cfg->metadata.enable) {
  		me->metadata.packet_type = get_csi_mipi_packet_type(
  				cfg->metadata.fmt_type);
  		rc = acquire_be_lut_entry(
  				me->csi_rx.backend_id,
  				me->metadata.packet_type,
  				&me->metadata.backend_lut_entry);
  	}
  
  	return rc;
  }
  
  static void destroy_input_system_input_port(
  	input_system_input_port_t	*me)
  {
  	if (me->source_type == INPUT_SYSTEM_SOURCE_TYPE_SENSOR) {
  		release_be_lut_entry(
  				me->csi_rx.backend_id,
  				me->csi_rx.packet_type,
  				&me->csi_rx.backend_lut_entry);
  	}
  
  	if (me->metadata.packet_type != CSI_MIPI_PACKET_TYPE_UNDEFINED) {
  		/*Free the backend lut allocated for metadata*/
  		release_be_lut_entry(
  				me->csi_rx.backend_id,
  				me->metadata.packet_type,
  				&me->metadata.backend_lut_entry);
  	}
  }
  
  static bool calculate_input_system_channel_cfg(
  	input_system_channel_t		*channel,
  	input_system_input_port_t	*input_port,
  	input_system_cfg_t		*isys_cfg,
  	input_system_channel_cfg_t	*channel_cfg,
  	bool metadata)
  {
  	bool rc;
  
  	rc = calculate_stream2mmio_cfg(isys_cfg, metadata,
  			&(channel_cfg->stream2mmio_cfg));
  	if (rc == false)
  		return false;
  
  	rc = calculate_ibuf_ctrl_cfg(
  			channel,
  			input_port,
  			isys_cfg,
  			&(channel_cfg->ibuf_ctrl_cfg));
  	if (rc == false)
  		return false;
  	if (metadata)
  		channel_cfg->ibuf_ctrl_cfg.stores_per_frame = isys_cfg->metadata.lines_per_frame;
  
  	rc = calculate_isys2401_dma_cfg(
  			channel,
  			isys_cfg,
  			&(channel_cfg->dma_cfg));
  	if (rc == false)
  		return false;
  
  	rc = calculate_isys2401_dma_port_cfg(
  			isys_cfg,
  			false,
  			metadata,
  			&(channel_cfg->dma_src_port_cfg));
  	if (rc == false)
  		return false;
  
  	rc = calculate_isys2401_dma_port_cfg(
  			isys_cfg,
  			isys_cfg->raw_packed,
  			metadata,
  			&(channel_cfg->dma_dest_port_cfg));
  	if (rc == false)
  		return false;
  
  	return true;
  }
  
  static bool calculate_input_system_input_port_cfg(
  	input_system_channel_t		*channel,
  	input_system_input_port_t	*input_port,
  	input_system_cfg_t		*isys_cfg,
  	input_system_input_port_cfg_t	*input_port_cfg)
  {
  	bool rc;
  
  	switch (input_port->source_type) {
  	case INPUT_SYSTEM_SOURCE_TYPE_SENSOR:
  		rc  = calculate_fe_cfg(
  				isys_cfg,
  				&(input_port_cfg->csi_rx_cfg.frontend_cfg));
  
  		rc &= calculate_be_cfg(
  				input_port,
  				isys_cfg,
  				false,
  				&(input_port_cfg->csi_rx_cfg.backend_cfg));
  
  		if (rc && isys_cfg->metadata.enable)
  			rc &= calculate_be_cfg(input_port, isys_cfg, true,
  					&input_port_cfg->csi_rx_cfg.md_backend_cfg);
  		break;
  	case INPUT_SYSTEM_SOURCE_TYPE_TPG:
  		rc = calculate_tpg_cfg(
  				channel,
  				input_port,
  				isys_cfg,
  				&(input_port_cfg->pixelgen_cfg.tpg_cfg));
  		break;
  	case INPUT_SYSTEM_SOURCE_TYPE_PRBS:
  		rc = calculate_prbs_cfg(
  				channel,
  				input_port,
  				isys_cfg,
  				&(input_port_cfg->pixelgen_cfg.prbs_cfg));
  		break;
  	default:
  		rc = false;
  		break;
  	}
  
  	return rc;
  }
  
  static bool acquire_sid(
  	stream2mmio_ID_t	stream2mmio,
  	stream2mmio_sid_ID_t	*sid)
  {
  	return ia_css_isys_stream2mmio_sid_rmgr_acquire(stream2mmio, sid);
  }
  
  static void release_sid(
  	stream2mmio_ID_t	stream2mmio,
  	stream2mmio_sid_ID_t	*sid)
  {
  	ia_css_isys_stream2mmio_sid_rmgr_release(stream2mmio, sid);
  }
  
  /* See also: ia_css_dma_configure_from_info() */
  static int32_t calculate_stride(
  	int32_t bits_per_pixel,
  	int32_t pixels_per_line,
  	bool	raw_packed,
  	int32_t align_in_bytes)
  {
  	int32_t bytes_per_line;
  	int32_t pixels_per_word;
  	int32_t words_per_line;
  	int32_t pixels_per_line_padded;
  
  	pixels_per_line_padded = CEIL_MUL(pixels_per_line, align_in_bytes);
  
  	if (!raw_packed)
  		bits_per_pixel = CEIL_MUL(bits_per_pixel, 8);
  
  	pixels_per_word = HIVE_ISP_DDR_WORD_BITS / bits_per_pixel;
  	words_per_line  = ceil_div(pixels_per_line_padded, pixels_per_word);
  	bytes_per_line  = HIVE_ISP_DDR_WORD_BYTES * words_per_line;
  
  	return bytes_per_line;
  }
  
  static bool acquire_ib_buffer(
  	int32_t bits_per_pixel,
  	int32_t pixels_per_line,
  	int32_t lines_per_frame,
  	int32_t align_in_bytes,
  	bool online,
  	ib_buffer_t *buf)
  {
  	buf->stride = calculate_stride(bits_per_pixel, pixels_per_line, false, align_in_bytes);
  	if (online)
  		buf->lines = 4; /* use double buffering for online usecases */
  	else
  		buf->lines = 2;
  
  	(void)(lines_per_frame);
  	return ia_css_isys_ibuf_rmgr_acquire(buf->stride * buf->lines, &buf->start_addr);
  }
  
  static void release_ib_buffer(
  	ib_buffer_t *buf)
  {
  	ia_css_isys_ibuf_rmgr_release(&buf->start_addr);
  }
  
  static bool acquire_dma_channel(
  	isys2401_dma_ID_t	dma_id,
  	isys2401_dma_channel	*channel)
  {
  	return ia_css_isys_dma_channel_rmgr_acquire(dma_id, channel);
  }
  
  static void release_dma_channel(
  	isys2401_dma_ID_t	dma_id,
  	isys2401_dma_channel	*channel)
  {
  	ia_css_isys_dma_channel_rmgr_release(dma_id, channel);
  }
  
  static bool acquire_be_lut_entry(
  	csi_rx_backend_ID_t		backend,
  	csi_mipi_packet_type_t		packet_type,
  	csi_rx_backend_lut_entry_t	*entry)
  {
  	return ia_css_isys_csi_rx_lut_rmgr_acquire(backend, packet_type, entry);
  }
  
  static void release_be_lut_entry(
  	csi_rx_backend_ID_t		backend,
  	csi_mipi_packet_type_t		packet_type,
  	csi_rx_backend_lut_entry_t	*entry)
  {
  	ia_css_isys_csi_rx_lut_rmgr_release(backend, packet_type, entry);
  }
  
  static bool calculate_tpg_cfg(
  	input_system_channel_t		*channel,
  	input_system_input_port_t	*input_port,
  	input_system_cfg_t		*isys_cfg,
  	pixelgen_tpg_cfg_t		*cfg)
  {
  	(void)channel;
  	(void)input_port;
  
  	memcpy_s(
  		(void *)cfg,
  		sizeof(pixelgen_tpg_cfg_t),
  		(void *)(&(isys_cfg->tpg_port_attr)),
  		sizeof(pixelgen_tpg_cfg_t));
  	return true;
  }
  
  static bool calculate_prbs_cfg(
  	input_system_channel_t		*channel,
  	input_system_input_port_t	*input_port,
  	input_system_cfg_t		*isys_cfg,
  	pixelgen_prbs_cfg_t		*cfg)
  {
  	(void)channel;
  	(void)input_port;
  
  	memcpy_s(
  		(void *)cfg,
  		sizeof(pixelgen_prbs_cfg_t),
  		(void *)(&(isys_cfg->prbs_port_attr)),
  		sizeof(pixelgen_prbs_cfg_t));
  	return true;
  }
  
  static bool calculate_fe_cfg(
  	const input_system_cfg_t	*isys_cfg,
  	csi_rx_frontend_cfg_t		*cfg)
  {
  	cfg->active_lanes = isys_cfg->csi_port_attr.active_lanes;
  	return true;
  }
  
  static bool calculate_be_cfg(
  	const input_system_input_port_t	*input_port,
  	const input_system_cfg_t	*isys_cfg,
  	bool				metadata,
  	csi_rx_backend_cfg_t		*cfg)
  {
  
  	memcpy_s(
  		(void *)(&cfg->lut_entry),
  		sizeof(csi_rx_backend_lut_entry_t),
  		metadata ? (void *)(&input_port->metadata.backend_lut_entry) :
  			(void *)(&input_port->csi_rx.backend_lut_entry),
  		sizeof(csi_rx_backend_lut_entry_t));
  
  	cfg->csi_mipi_cfg.virtual_channel = isys_cfg->csi_port_attr.ch_id;
  	if (metadata) {
  		cfg->csi_mipi_packet_type = get_csi_mipi_packet_type(isys_cfg->metadata.fmt_type);
  		cfg->csi_mipi_cfg.comp_enable = false;
  		cfg->csi_mipi_cfg.data_type = isys_cfg->metadata.fmt_type;
  	}
  	else {
  		cfg->csi_mipi_packet_type = get_csi_mipi_packet_type(isys_cfg->csi_port_attr.fmt_type);
  		cfg->csi_mipi_cfg.data_type = isys_cfg->csi_port_attr.fmt_type;
  		cfg->csi_mipi_cfg.comp_enable = isys_cfg->csi_port_attr.comp_enable;
  		cfg->csi_mipi_cfg.comp_scheme = isys_cfg->csi_port_attr.comp_scheme;
  		cfg->csi_mipi_cfg.comp_predictor = isys_cfg->csi_port_attr.comp_predictor;
  		cfg->csi_mipi_cfg.comp_bit_idx = cfg->csi_mipi_cfg.data_type - MIPI_FORMAT_CUSTOM0;
  	}
  
  	return true;
  }
  
  static bool calculate_stream2mmio_cfg(
  	const input_system_cfg_t	*isys_cfg,
  	bool				metadata,
  	stream2mmio_cfg_t		*cfg
  )
  {
  	cfg->bits_per_pixel = metadata ? isys_cfg->metadata.bits_per_pixel :
  		isys_cfg->input_port_resolution.bits_per_pixel;
  
  	cfg->enable_blocking =
  		((isys_cfg->mode == INPUT_SYSTEM_SOURCE_TYPE_TPG) ||
  		 (isys_cfg->mode == INPUT_SYSTEM_SOURCE_TYPE_PRBS));
  
  	return true;
  }
  
  static bool calculate_ibuf_ctrl_cfg(
  	const input_system_channel_t	*channel,
  	const input_system_input_port_t	*input_port,
  	const input_system_cfg_t	*isys_cfg,
  	ibuf_ctrl_cfg_t			*cfg)
  {
  	const int32_t bits_per_byte = 8;
  	int32_t bits_per_pixel;
  	int32_t bytes_per_pixel;
  	int32_t left_padding;
  
  	(void)input_port;
  
  	bits_per_pixel = isys_cfg->input_port_resolution.bits_per_pixel;
  	bytes_per_pixel = ceil_div(bits_per_pixel, bits_per_byte);
  
  	left_padding = CEIL_MUL(isys_cfg->output_port_attr.left_padding, ISP_VEC_NELEMS)
  			* bytes_per_pixel;
  
  	cfg->online	= isys_cfg->online;
  
  	cfg->dma_cfg.channel	= channel->dma_channel;
  	cfg->dma_cfg.cmd	= _DMA_V2_MOVE_A2B_NO_SYNC_CHK_COMMAND;
  
  	cfg->dma_cfg.shift_returned_items	= 0;
  	cfg->dma_cfg.elems_per_word_in_ibuf	= 0;
  	cfg->dma_cfg.elems_per_word_in_dest	= 0;
  
  	cfg->ib_buffer.start_addr		= channel->ib_buffer.start_addr;
  	cfg->ib_buffer.stride			= channel->ib_buffer.stride;
  	cfg->ib_buffer.lines			= channel->ib_buffer.lines;
  
  	/*
  #ifndef ISP2401
  	 * zhengjie.lu@intel.com:
  #endif
  	 * "dest_buf_cfg" should be part of the input system output
  	 * port configuration.
  	 *
  	 * TODO: move "dest_buf_cfg" to the input system output
  	 * port configuration.
  	 */
  
  	/* input_buf addr only available in sched mode;
  	   this buffer is allocated in isp, crun mode addr
  	   can be passed by after ISP allocation */
  	if (cfg->online) {
  		cfg->dest_buf_cfg.start_addr	= ISP_INPUT_BUF_START_ADDR + left_padding;
  		cfg->dest_buf_cfg.stride	= bytes_per_pixel
  			* isys_cfg->output_port_attr.max_isp_input_width;
  		cfg->dest_buf_cfg.lines		= LINES_OF_ISP_INPUT_BUF;
  	} else if (isys_cfg->raw_packed) {
  		cfg->dest_buf_cfg.stride	= calculate_stride(bits_per_pixel,
  							isys_cfg->input_port_resolution.pixels_per_line,
  							isys_cfg->raw_packed,
  							isys_cfg->input_port_resolution.align_req_in_bytes);
  	} else {
  		cfg->dest_buf_cfg.stride	= channel->ib_buffer.stride;
  	}
  
  	/*
  #ifndef ISP2401
  	 * zhengjie.lu@intel.com:
  #endif
  	 * "items_per_store" is hard coded as "1", which is ONLY valid
  	 * when the CSI-MIPI long packet is transferred.
  	 *
  	 * TODO: After the 1st stage of MERR+,  make the proper solution to
  	 * configure "items_per_store" so that it can also handle the CSI-MIPI
  	 * short packet.
  	 */
  	cfg->items_per_store		= 1;
  
  	cfg->stores_per_frame		= isys_cfg->input_port_resolution.lines_per_frame;
  
  
  	cfg->stream2mmio_cfg.sync_cmd	= _STREAM2MMIO_CMD_TOKEN_SYNC_FRAME;
  
  	/* TODO: Define conditions as when to use store words vs store packets */
  	cfg->stream2mmio_cfg.store_cmd	= _STREAM2MMIO_CMD_TOKEN_STORE_PACKETS;
  
  	return true;
  }
  
  static bool calculate_isys2401_dma_cfg(
  	const input_system_channel_t	*channel,
  	const input_system_cfg_t	*isys_cfg,
  	isys2401_dma_cfg_t		*cfg)
  {
  	cfg->channel	= channel->dma_channel;
  
  	/* only online/sensor mode goto vmem
  	   offline/buffered_sensor, tpg and prbs will go to ddr */
  	if (isys_cfg->online)
  		cfg->connection = isys2401_dma_ibuf_to_vmem_connection;
  	else
  		cfg->connection = isys2401_dma_ibuf_to_ddr_connection;
  
  	cfg->extension	= isys2401_dma_zero_extension;
  	cfg->height	= 1;
  
  	return true;
  }
  
  /* See also: ia_css_dma_configure_from_info() */
  static bool calculate_isys2401_dma_port_cfg(
  	const input_system_cfg_t	*isys_cfg,
  	bool				raw_packed,
  	bool				metadata,
  	isys2401_dma_port_cfg_t		*cfg)
  {
  	int32_t bits_per_pixel;
  	int32_t pixels_per_line;
  	int32_t align_req_in_bytes;
  
  	/* TODO: Move metadata away from isys_cfg to application layer */
  	if (metadata) {
  		bits_per_pixel = isys_cfg->metadata.bits_per_pixel;
  		pixels_per_line = isys_cfg->metadata.pixels_per_line;
  		align_req_in_bytes = isys_cfg->metadata.align_req_in_bytes;
  	} else {
  		bits_per_pixel = isys_cfg->input_port_resolution.bits_per_pixel;
  		pixels_per_line = isys_cfg->input_port_resolution.pixels_per_line;
  		align_req_in_bytes = isys_cfg->input_port_resolution.align_req_in_bytes;
  	}
  
  	cfg->stride	= calculate_stride(bits_per_pixel, pixels_per_line, raw_packed, align_req_in_bytes);
  
  	if (!raw_packed)
  		bits_per_pixel = CEIL_MUL(bits_per_pixel, 8);
  
  	cfg->elements	= HIVE_ISP_DDR_WORD_BITS / bits_per_pixel;
  	cfg->cropping	= 0;
  	cfg->width	= CEIL_DIV(cfg->stride, HIVE_ISP_DDR_WORD_BYTES);
  
  	return true;
  }
  
  static csi_mipi_packet_type_t get_csi_mipi_packet_type(
  	int32_t data_type)
  {
  	csi_mipi_packet_type_t packet_type;
  
  	packet_type = CSI_MIPI_PACKET_TYPE_RESERVED;
  
  	if (data_type >= 0 && data_type <= MIPI_FORMAT_SHORT8)
  		packet_type = CSI_MIPI_PACKET_TYPE_SHORT;
  
  	if (data_type > MIPI_FORMAT_SHORT8 && data_type <= N_MIPI_FORMAT)
  		packet_type = CSI_MIPI_PACKET_TYPE_LONG;
  
  	return packet_type;
  }
  /** end of Private Methods */
  #endif
  