text: // SPDX-License-Identifier: GPL-2.0
  /*
   * 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 <assert_support.h>
  #include <ia_css_frame_public.h>
  #include <ia_css_frame.h>
  #include <ia_css_binary.h>
  #define IA_CSS_INCLUDE_CONFIGURATIONS
  #include "ia_css_isp_configs.h"
  #include "isp.h"
  #include "ia_css_ref.host.h"
  
  void
  ia_css_ref_config(
      struct sh_css_isp_ref_isp_config *to,
      const struct ia_css_ref_configuration  *from,
      unsigned int size)
  {
  	unsigned int elems_a = ISP_VEC_NELEMS, i;
  
  	if (from->ref_frames[0]) {
  		ia_css_dma_configure_from_info(&to->port_b, &from->ref_frames[0]->info);
  		to->width_a_over_b = elems_a / to->port_b.elems;
  		to->dvs_frame_delay = from->dvs_frame_delay;
  	} else {
  		to->width_a_over_b = 1;
  		to->dvs_frame_delay = 0;
  		to->port_b.elems = elems_a;
  	}
  	for (i = 0; i < MAX_NUM_VIDEO_DELAY_FRAMES; i++) {
  		if (from->ref_frames[i]) {
  			to->ref_frame_addr_y[i] = from->ref_frames[i]->data +
  						  from->ref_frames[i]->planes.yuv.y.offset;
  			to->ref_frame_addr_c[i] = from->ref_frames[i]->data +
  						  from->ref_frames[i]->planes.yuv.u.offset;
  		} else {
  			to->ref_frame_addr_y[i] = 0;
  			to->ref_frame_addr_c[i] = 0;
  		}
  	}
  
  	/* Assume divisiblity here, may need to generalize to fixed point. */
  	assert(elems_a % to->port_b.elems == 0);
  }
  
  void
  ia_css_ref_configure(
      const struct ia_css_binary     *binary,
      const struct ia_css_frame * const *ref_frames,
      const uint32_t dvs_frame_delay)
  {
  	struct ia_css_ref_configuration config;
  	unsigned int i;
  
  	for (i = 0; i < MAX_NUM_VIDEO_DELAY_FRAMES; i++)
  		config.ref_frames[i] = ref_frames[i];
  	config.dvs_frame_delay = dvs_frame_delay;
  	ia_css_configure_ref(binary, &config);
  }
  
  void
  ia_css_init_ref_state(
      struct sh_css_isp_ref_dmem_state *state,
      unsigned int size)
  {
  	(void)size;
  	assert(MAX_NUM_VIDEO_DELAY_FRAMES >= 2);
  	state->ref_in_buf_idx = 0;
  	state->ref_out_buf_idx = 1;
  }
  