1 /* $NetBSD: dc_dsc.h,v 1.2 2021/12/18 23:45:00 riastradh Exp $ */ 2 3 #ifndef DC_DSC_H_ 4 #define DC_DSC_H_ 5 /* 6 * Copyright 2019 Advanced Micro Devices, Inc. 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a 9 * copy of this software and associated documentation files (the "Software"), 10 * to deal in the Software without restriction, including without limitation 11 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 12 * and/or sell copies of the Software, and to permit persons to whom the 13 * Software is furnished to do so, subject to the following conditions: 14 * 15 * The above copyright notice and this permission notice shall be included in 16 * all copies or substantial portions of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 24 * OTHER DEALINGS IN THE SOFTWARE. 25 * 26 * Author: AMD 27 */ 28 29 /* put it here temporarily until linux has the new addresses official defined */ 30 /* DP Extended DSC Capabilities */ 31 #define DP_DSC_BRANCH_OVERALL_THROUGHPUT_0 0x0a0 /* DP 1.4a SCR */ 32 #define DP_DSC_BRANCH_OVERALL_THROUGHPUT_1 0x0a1 33 #define DP_DSC_BRANCH_MAX_LINE_WIDTH 0x0a2 34 #include "dc_types.h" 35 36 struct dc_dsc_bw_range { 37 uint32_t min_kbps; /* Bandwidth if min_target_bpp_x16 is used */ 38 uint32_t min_target_bpp_x16; 39 uint32_t max_kbps; /* Bandwidth if max_target_bpp_x16 is used */ 40 uint32_t max_target_bpp_x16; 41 uint32_t stream_kbps; /* Uncompressed stream bandwidth */ 42 }; 43 44 struct display_stream_compressor { 45 const struct dsc_funcs *funcs; 46 struct dc_context *ctx; 47 int inst; 48 }; 49 50 struct dc_dsc_policy { 51 bool use_min_slices_h; 52 int max_slices_h; // Maximum available if 0 53 int min_slice_height; // Must not be less than 8 54 uint32_t max_target_bpp; 55 uint32_t min_target_bpp; 56 }; 57 58 bool dc_dsc_parse_dsc_dpcd(const struct dc *dc, 59 const uint8_t *dpcd_dsc_basic_data, 60 const uint8_t *dpcd_dsc_ext_data, 61 struct dsc_dec_dpcd_caps *dsc_sink_caps); 62 63 bool dc_dsc_compute_bandwidth_range( 64 const struct display_stream_compressor *dsc, 65 const uint32_t dsc_min_slice_height_override, 66 const uint32_t min_bpp, 67 const uint32_t max_bpp, 68 const struct dsc_dec_dpcd_caps *dsc_sink_caps, 69 const struct dc_crtc_timing *timing, 70 struct dc_dsc_bw_range *range); 71 72 bool dc_dsc_compute_config( 73 const struct display_stream_compressor *dsc, 74 const struct dsc_dec_dpcd_caps *dsc_sink_caps, 75 const uint32_t dsc_min_slice_height_override, 76 uint32_t target_bandwidth_kbps, 77 const struct dc_crtc_timing *timing, 78 struct dc_dsc_config *dsc_cfg); 79 80 void dc_dsc_get_policy_for_timing(const struct dc_crtc_timing *timing, 81 struct dc_dsc_policy *policy); 82 83 void dc_dsc_policy_set_max_target_bpp_limit(uint32_t limit); 84 85 #endif 86