1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright 2021 Advanced Micro Devices, Inc. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be included in 13 * all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 21 * OTHER DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: AMD 24 * 25 */ 26 27 #include "resource.h" 28 29 #include "dcn20_fpu.h" 30 31 /** 32 * DOC: DCN2x FPU manipulation Overview 33 * 34 * The DCN architecture relies on FPU operations, which require special 35 * compilation flags and the use of kernel_fpu_begin/end functions; ideally, we 36 * want to avoid spreading FPU access across multiple files. With this idea in 37 * mind, this file aims to centralize all DCN20 and DCN2.1 (DCN2x) functions 38 * that require FPU access in a single place. Code in this file follows the 39 * following code pattern: 40 * 41 * 1. Functions that use FPU operations should be isolated in static functions. 42 * 2. The FPU functions should have the noinline attribute to ensure anything 43 * that deals with FP register is contained within this call. 44 * 3. All function that needs to be accessed outside this file requires a 45 * public interface that not uses any FPU reference. 46 * 4. Developers **must not** use DC_FP_START/END in this file, but they need 47 * to ensure that the caller invokes it before access any function available 48 * in this file. For this reason, public functions in this file must invoke 49 * dc_assert_fp_enabled(); 50 * 51 * Let's expand a little bit more the idea in the code pattern. To fully 52 * isolate FPU operations in a single place, we must avoid situations where 53 * compilers spill FP values to registers due to FP enable in a specific C 54 * file. Note that even if we isolate all FPU functions in a single file and 55 * call its interface from other files, the compiler might enable the use of 56 * FPU before we call DC_FP_START. Nevertheless, it is the programmer's 57 * responsibility to invoke DC_FP_START/END in the correct place. To highlight 58 * situations where developers forgot to use the FP protection before calling 59 * the DC FPU interface functions, we introduce a helper that checks if the 60 * function is invoked under FP protection. If not, it will trigger a kernel 61 * warning. 62 */ 63 64 void dcn20_populate_dml_writeback_from_context(struct dc *dc, 65 struct resource_context *res_ctx, 66 display_e2e_pipe_params_st *pipes) 67 { 68 int pipe_cnt, i; 69 70 dc_assert_fp_enabled(); 71 72 for (i = 0, pipe_cnt = 0; i < dc->res_pool->pipe_count; i++) { 73 struct dc_writeback_info *wb_info = &res_ctx->pipe_ctx[i].stream->writeback_info[0]; 74 75 if (!res_ctx->pipe_ctx[i].stream) 76 continue; 77 78 /* Set writeback information */ 79 pipes[pipe_cnt].dout.wb_enable = (wb_info->wb_enabled == true) ? 1 : 0; 80 pipes[pipe_cnt].dout.num_active_wb++; 81 pipes[pipe_cnt].dout.wb.wb_src_height = wb_info->dwb_params.cnv_params.crop_height; 82 pipes[pipe_cnt].dout.wb.wb_src_width = wb_info->dwb_params.cnv_params.crop_width; 83 pipes[pipe_cnt].dout.wb.wb_dst_width = wb_info->dwb_params.dest_width; 84 pipes[pipe_cnt].dout.wb.wb_dst_height = wb_info->dwb_params.dest_height; 85 pipes[pipe_cnt].dout.wb.wb_htaps_luma = 1; 86 pipes[pipe_cnt].dout.wb.wb_vtaps_luma = 1; 87 pipes[pipe_cnt].dout.wb.wb_htaps_chroma = wb_info->dwb_params.scaler_taps.h_taps_c; 88 pipes[pipe_cnt].dout.wb.wb_vtaps_chroma = wb_info->dwb_params.scaler_taps.v_taps_c; 89 pipes[pipe_cnt].dout.wb.wb_hratio = 1.0; 90 pipes[pipe_cnt].dout.wb.wb_vratio = 1.0; 91 if (wb_info->dwb_params.out_format == dwb_scaler_mode_yuv420) { 92 if (wb_info->dwb_params.output_depth == DWB_OUTPUT_PIXEL_DEPTH_8BPC) 93 pipes[pipe_cnt].dout.wb.wb_pixel_format = dm_420_8; 94 else 95 pipes[pipe_cnt].dout.wb.wb_pixel_format = dm_420_10; 96 } else { 97 pipes[pipe_cnt].dout.wb.wb_pixel_format = dm_444_32; 98 } 99 100 pipe_cnt++; 101 } 102 } 103