diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dsc/rc_calc_dpi.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dsc/rc_calc_dpi.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dsc/rc_calc_dpi.c b/drivers/gpu/drm/amd/display/dc/dsc/rc_calc_dpi.c new file mode 100644 index 000000000000..73172fd0b529 --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/dsc/rc_calc_dpi.c @@ -0,0 +1,147 @@ +#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 |