Line data    Source code

       1             : /*
       2             :  * Copyright 2012-17 Advanced Micro Devices, Inc.
       3             :  *
       4             :  * Permission is hereby granted, free of charge, to any person obtaining a
       5             :  * copy of this software and associated documentation files (the "Software"),
       6             :  * to deal in the Software without restriction, including without limitation
       7             :  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
       8             :  * and/or sell copies of the Software, and to permit persons to whom the
       9             :  * Software is furnished to do so, subject to the following conditions:
      10             :  *
      11             :  * The above copyright notice and this permission notice shall be included in
      12             :  * all copies or substantial portions of the Software.
      13             :  *
      14             :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      15             :  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      16             :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
      17             :  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
      18             :  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
      19             :  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
      20             :  * OTHER DEALINGS IN THE SOFTWARE.
      21             :  *
      22             :  * Authors: AMD
      23             :  *
      24             :  */
      25             : #include <drm/display/drm_dsc_helper.h>
      26             : #include "dscc_types.h"
      27             : #include "rc_calc.h"
      28             : 
      29           0 : static void copy_pps_fields(struct drm_dsc_config *to, const struct drm_dsc_config *from)
      30             : {
      31           0 :         to->line_buf_depth           = from->line_buf_depth;
      32           0 :         to->bits_per_component       = from->bits_per_component;
      33           0 :         to->convert_rgb              = from->convert_rgb;
      34           0 :         to->slice_width              = from->slice_width;
      35           0 :         to->slice_height             = from->slice_height;
      36           0 :         to->simple_422               = from->simple_422;
      37           0 :         to->native_422               = from->native_422;
      38           0 :         to->native_420               = from->native_420;
      39           0 :         to->pic_width                = from->pic_width;
      40           0 :         to->pic_height               = from->pic_height;
      41           0 :         to->rc_tgt_offset_high       = from->rc_tgt_offset_high;
      42           0 :         to->rc_tgt_offset_low        = from->rc_tgt_offset_low;
      43           0 :         to->bits_per_pixel           = from->bits_per_pixel;
      44           0 :         to->rc_edge_factor           = from->rc_edge_factor;
      45           0 :         to->rc_quant_incr_limit1     = from->rc_quant_incr_limit1;
      46           0 :         to->rc_quant_incr_limit0     = from->rc_quant_incr_limit0;
      47           0 :         to->initial_xmit_delay       = from->initial_xmit_delay;
      48           0 :         to->initial_dec_delay        = from->initial_dec_delay;
      49           0 :         to->block_pred_enable        = from->block_pred_enable;
      50           0 :         to->first_line_bpg_offset    = from->first_line_bpg_offset;
      51           0 :         to->second_line_bpg_offset   = from->second_line_bpg_offset;
      52           0 :         to->initial_offset           = from->initial_offset;
      53           0 :         memcpy(&to->rc_buf_thresh, &from->rc_buf_thresh, sizeof(from->rc_buf_thresh));
      54           0 :         memcpy(&to->rc_range_params, &from->rc_range_params, sizeof(from->rc_range_params));
      55           0 :         to->rc_model_size            = from->rc_model_size;
      56           0 :         to->flatness_min_qp          = from->flatness_min_qp;
      57           0 :         to->flatness_max_qp          = from->flatness_max_qp;
      58           0 :         to->initial_scale_value      = from->initial_scale_value;
      59           0 :         to->scale_decrement_interval = from->scale_decrement_interval;
      60           0 :         to->scale_increment_interval = from->scale_increment_interval;
      61           0 :         to->nfl_bpg_offset           = from->nfl_bpg_offset;
      62           0 :         to->nsl_bpg_offset           = from->nsl_bpg_offset;
      63           0 :         to->slice_bpg_offset         = from->slice_bpg_offset;
      64           0 :         to->final_offset             = from->final_offset;
      65           0 :         to->vbr_enable               = from->vbr_enable;
      66           0 :         to->slice_chunk_size         = from->slice_chunk_size;
      67           0 :         to->second_line_offset_adj   = from->second_line_offset_adj;
      68           0 :         to->dsc_version_minor        = from->dsc_version_minor;
      69           0 : }
      70             : 
      71           0 : static void copy_rc_to_cfg(struct drm_dsc_config *dsc_cfg, const struct rc_params *rc)
      72             : {
      73             :         int i;
      74             : 
      75           0 :         dsc_cfg->rc_quant_incr_limit0   = rc->rc_quant_incr_limit0;
      76           0 :         dsc_cfg->rc_quant_incr_limit1   = rc->rc_quant_incr_limit1;
      77           0 :         dsc_cfg->initial_offset         = rc->initial_fullness_offset;
      78           0 :         dsc_cfg->initial_xmit_delay     = rc->initial_xmit_delay;
      79           0 :         dsc_cfg->first_line_bpg_offset  = rc->first_line_bpg_offset;
      80           0 :         dsc_cfg->second_line_bpg_offset = rc->second_line_bpg_offset;
      81           0 :         dsc_cfg->flatness_min_qp        = rc->flatness_min_qp;
      82           0 :         dsc_cfg->flatness_max_qp        = rc->flatness_max_qp;
      83           0 :         for (i = 0; i < QP_SET_SIZE; ++i) {
      84           0 :                 dsc_cfg->rc_range_params[i].range_min_qp     = rc->qp_min[i];
      85           0 :                 dsc_cfg->rc_range_params[i].range_max_qp     = rc->qp_max[i];
      86             :                 /* Truncate 8-bit signed value to 6-bit signed value */
      87           0 :                 dsc_cfg->rc_range_params[i].range_bpg_offset = 0x3f & rc->ofs[i];
      88             :         }
      89           0 :         dsc_cfg->rc_model_size    = rc->rc_model_size;
      90           0 :         dsc_cfg->rc_edge_factor   = rc->rc_edge_factor;
      91           0 :         dsc_cfg->rc_tgt_offset_high = rc->rc_tgt_offset_hi;
      92           0 :         dsc_cfg->rc_tgt_offset_low = rc->rc_tgt_offset_lo;
      93             : 
      94           0 :         for (i = 0; i < QP_SET_SIZE - 1; ++i)
      95           0 :                 dsc_cfg->rc_buf_thresh[i] = rc->rc_buf_thresh[i];
      96           0 : }
      97             : 
      98           0 : int dscc_compute_dsc_parameters(const struct drm_dsc_config *pps, struct dsc_parameters *dsc_params)
      99             : {
     100             :         int              ret;
     101             :         struct rc_params rc;
     102             :         struct drm_dsc_config   dsc_cfg;
     103             :         unsigned long long tmp;
     104             : 
     105           0 :         calc_rc_params(&rc, pps);
     106           0 :         dsc_params->pps = *pps;
     107           0 :         dsc_params->pps.initial_scale_value = 8 * rc.rc_model_size / (rc.rc_model_size - rc.initial_fullness_offset);
     108             : 
     109           0 :         copy_pps_fields(&dsc_cfg, &dsc_params->pps);
     110           0 :         copy_rc_to_cfg(&dsc_cfg, &rc);
     111             : 
     112           0 :         dsc_cfg.mux_word_size = dsc_params->pps.bits_per_component <= 10 ? 48 : 64;
     113             : 
     114           0 :         ret = drm_dsc_compute_rc_parameters(&dsc_cfg);
     115           0 :         tmp = (unsigned long long)dsc_cfg.slice_chunk_size * 0x10000000 + (dsc_cfg.slice_width - 1);
     116           0 :         do_div(tmp, (uint32_t)dsc_cfg.slice_width);  //ROUND-UP
     117           0 :         dsc_params->bytes_per_pixel = (uint32_t)tmp;
     118             : 
     119           0 :         copy_pps_fields(&dsc_params->pps, &dsc_cfg);
     120           0 :         dsc_params->rc_buffer_model_size = dsc_cfg.rc_bits;
     121           0 :         return ret;
     122             : }
     123             :