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#if defined(CONFIG_DRM_AMD_DC_DSC_SUPPORT)
/*
* 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 "os_types.h"
#include <drm/drm_dsc.h>
#include "dscc_types.h"
#include "rc_calc.h"
double dsc_ceil(double num);
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)
{
enum colour_mode mode = pps->convert_rgb ? CM_RGB :
(pps->simple_422 ? CM_444 :
(pps->native_422 ? CM_422 :
pps->native_420 ? CM_420 : CM_444));
enum bits_per_comp bpc = (pps->bits_per_component == 8) ? BPC_8 :
(pps->bits_per_component == 10) ? BPC_10 : BPC_12;
float bpp = ((float) pps->bits_per_pixel / 16.0);
int slice_width = pps->slice_width;
int slice_height = pps->slice_height;
int ret;
struct rc_params rc;
struct drm_dsc_config dsc_cfg;
double d_bytes_per_pixel = dsc_ceil(bpp * slice_width / 8.0) / slice_width;
// TODO: Make sure the formula for calculating this is precise (ceiling vs. floor, and at what point they should be applied)
if (pps->native_422 || pps->native_420)
d_bytes_per_pixel /= 2;
dsc_params->bytes_per_pixel = (uint32_t)dsc_ceil(d_bytes_per_pixel * 0x10000000);
/* in native_422 or native_420 modes, the bits_per_pixel is double the target bpp
* (the latter is what calc_rc_params expects)
*/
if (pps->native_422 || pps->native_420)
bpp /= 2.0;
calc_rc_params(&rc, mode, bpc, bpp, slice_width, slice_height, pps->dsc_version_minor);
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);
copy_pps_fields(&dsc_params->pps, &dsc_cfg);
dsc_params->rc_buffer_model_size = dsc_cfg.rc_bits;
return ret;
}
#endif
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