OSCL-LXR linux-6.0.1/​drivers/​gpu/​drm/​amd/​display/​dc/​dsc/​rc_calc_dpi.c	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 /*
  * Copyright 2012-17 Advanced Micro Devices, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  *
  * Authors: AMD
  *
  */
 #include <drm/display/drm_dsc_helper.h>
 #include "dscc_types.h"
 #include "rc_calc.h"
 
 static void copy_pps_fields(struct drm_dsc_config *to, const struct drm_dsc_config *from)
 {
     to->line_buf_depth           = from->line_buf_depth;
     to->bits_per_component       = from->bits_per_component;
     to->convert_rgb              = from->convert_rgb;
     to->slice_width              = from->slice_width;
     to->slice_height             = from->slice_height;
     to->simple_422               = from->simple_422;
     to->native_422               = from->native_422;
     to->native_420               = from->native_420;
     to->pic_width                = from->pic_width;
     to->pic_height               = from->pic_height;
     to->rc_tgt_offset_high       = from->rc_tgt_offset_high;
     to->rc_tgt_offset_low        = from->rc_tgt_offset_low;
     to->bits_per_pixel           = from->bits_per_pixel;
     to->rc_edge_factor           = from->rc_edge_factor;
     to->rc_quant_incr_limit1     = from->rc_quant_incr_limit1;
     to->rc_quant_incr_limit0     = from->rc_quant_incr_limit0;
     to->initial_xmit_delay       = from->initial_xmit_delay;
     to->initial_dec_delay        = from->initial_dec_delay;
     to->block_pred_enable        = from->block_pred_enable;
     to->first_line_bpg_offset    = from->first_line_bpg_offset;
     to->second_line_bpg_offset   = from->second_line_bpg_offset;
     to->initial_offset           = from->initial_offset;
     memcpy(&to->rc_buf_thresh, &from->rc_buf_thresh, sizeof(from->rc_buf_thresh));
     memcpy(&to->rc_range_params, &from->rc_range_params, sizeof(from->rc_range_params));
     to->rc_model_size            = from->rc_model_size;
     to->flatness_min_qp          = from->flatness_min_qp;
     to->flatness_max_qp          = from->flatness_max_qp;
     to->initial_scale_value      = from->initial_scale_value;
     to->scale_decrement_interval = from->scale_decrement_interval;
     to->scale_increment_interval = from->scale_increment_interval;
     to->nfl_bpg_offset           = from->nfl_bpg_offset;
     to->nsl_bpg_offset           = from->nsl_bpg_offset;
     to->slice_bpg_offset         = from->slice_bpg_offset;
     to->final_offset             = from->final_offset;
     to->vbr_enable               = from->vbr_enable;
     to->slice_chunk_size         = from->slice_chunk_size;
     to->second_line_offset_adj   = from->second_line_offset_adj;
     to->dsc_version_minor        = from->dsc_version_minor;
 }
 
 static void copy_rc_to_cfg(struct drm_dsc_config *dsc_cfg, const struct rc_params *rc)
 {
     int i;
 
     dsc_cfg->rc_quant_incr_limit0   = rc->rc_quant_incr_limit0;
     dsc_cfg->rc_quant_incr_limit1   = rc->rc_quant_incr_limit1;
     dsc_cfg->initial_offset         = rc->initial_fullness_offset;
     dsc_cfg->initial_xmit_delay     = rc->initial_xmit_delay;
     dsc_cfg->first_line_bpg_offset  = rc->first_line_bpg_offset;
     dsc_cfg->second_line_bpg_offset = rc->second_line_bpg_offset;
     dsc_cfg->flatness_min_qp        = rc->flatness_min_qp;
     dsc_cfg->flatness_max_qp        = rc->flatness_max_qp;
     for (i = 0; i < QP_SET_SIZE; ++i) {
         dsc_cfg->rc_range_params[i].range_min_qp     = rc->qp_min[i];
         dsc_cfg->rc_range_params[i].range_max_qp     = rc->qp_max[i];
         /* Truncate 8-bit signed value to 6-bit signed value */
         dsc_cfg->rc_range_params[i].range_bpg_offset = 0x3f & rc->ofs[i];
     }
     dsc_cfg->rc_model_size    = rc->rc_model_size;
     dsc_cfg->rc_edge_factor   = rc->rc_edge_factor;
     dsc_cfg->rc_tgt_offset_high = rc->rc_tgt_offset_hi;
     dsc_cfg->rc_tgt_offset_low = rc->rc_tgt_offset_lo;
 
     for (i = 0; i < QP_SET_SIZE - 1; ++i)
         dsc_cfg->rc_buf_thresh[i] = rc->rc_buf_thresh[i];
 }
 
 int dscc_compute_dsc_parameters(const struct drm_dsc_config *pps, struct dsc_parameters *dsc_params)
 {
     int              ret;
     struct rc_params rc;
     struct drm_dsc_config   dsc_cfg;
     unsigned long long tmp;
 
     calc_rc_params(&rc, pps);
     dsc_params->pps = *pps;
     dsc_params->pps.initial_scale_value = 8 * rc.rc_model_size / (rc.rc_model_size - rc.initial_fullness_offset);
 
     copy_pps_fields(&dsc_cfg, &dsc_params->pps);
     copy_rc_to_cfg(&dsc_cfg, &rc);
 
     dsc_cfg.mux_word_size = dsc_params->pps.bits_per_component <= 10 ? 48 : 64;
 
     ret = drm_dsc_compute_rc_parameters(&dsc_cfg);
     tmp = (unsigned long long)dsc_cfg.slice_chunk_size * 0x10000000 + (dsc_cfg.slice_width - 1);
     do_div(tmp, (uint32_t)dsc_cfg.slice_width);  //ROUND-UP
     dsc_params->bytes_per_pixel = (uint32_t)tmp;
 
     copy_pps_fields(&dsc_params->pps, &dsc_cfg);
     dsc_params->rc_buffer_model_size = dsc_cfg.rc_bits;
     return ret;
 }
 

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