| // SPDX-License-Identifier: MIT |
| /* |
| * Copyright 2021 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 "resource.h" |
| |
| #include "dcn20_fpu.h" |
| |
| /** |
| * DOC: DCN2x FPU manipulation Overview |
| * |
| * The DCN architecture relies on FPU operations, which require special |
| * compilation flags and the use of kernel_fpu_begin/end functions; ideally, we |
| * want to avoid spreading FPU access across multiple files. With this idea in |
| * mind, this file aims to centralize all DCN20 and DCN2.1 (DCN2x) functions |
| * that require FPU access in a single place. Code in this file follows the |
| * following code pattern: |
| * |
| * 1. Functions that use FPU operations should be isolated in static functions. |
| * 2. The FPU functions should have the noinline attribute to ensure anything |
| * that deals with FP register is contained within this call. |
| * 3. All function that needs to be accessed outside this file requires a |
| * public interface that not uses any FPU reference. |
| * 4. Developers **must not** use DC_FP_START/END in this file, but they need |
| * to ensure that the caller invokes it before access any function available |
| * in this file. For this reason, public functions in this file must invoke |
| * dc_assert_fp_enabled(); |
| * |
| * Let's expand a little bit more the idea in the code pattern. To fully |
| * isolate FPU operations in a single place, we must avoid situations where |
| * compilers spill FP values to registers due to FP enable in a specific C |
| * file. Note that even if we isolate all FPU functions in a single file and |
| * call its interface from other files, the compiler might enable the use of |
| * FPU before we call DC_FP_START. Nevertheless, it is the programmer's |
| * responsibility to invoke DC_FP_START/END in the correct place. To highlight |
| * situations where developers forgot to use the FP protection before calling |
| * the DC FPU interface functions, we introduce a helper that checks if the |
| * function is invoked under FP protection. If not, it will trigger a kernel |
| * warning. |
| */ |
| |
| void dcn20_populate_dml_writeback_from_context(struct dc *dc, |
| struct resource_context *res_ctx, |
| display_e2e_pipe_params_st *pipes) |
| { |
| int pipe_cnt, i; |
| |
| dc_assert_fp_enabled(); |
| |
| for (i = 0, pipe_cnt = 0; i < dc->res_pool->pipe_count; i++) { |
| struct dc_writeback_info *wb_info = &res_ctx->pipe_ctx[i].stream->writeback_info[0]; |
| |
| if (!res_ctx->pipe_ctx[i].stream) |
| continue; |
| |
| /* Set writeback information */ |
| pipes[pipe_cnt].dout.wb_enable = (wb_info->wb_enabled == true) ? 1 : 0; |
| pipes[pipe_cnt].dout.num_active_wb++; |
| pipes[pipe_cnt].dout.wb.wb_src_height = wb_info->dwb_params.cnv_params.crop_height; |
| pipes[pipe_cnt].dout.wb.wb_src_width = wb_info->dwb_params.cnv_params.crop_width; |
| pipes[pipe_cnt].dout.wb.wb_dst_width = wb_info->dwb_params.dest_width; |
| pipes[pipe_cnt].dout.wb.wb_dst_height = wb_info->dwb_params.dest_height; |
| pipes[pipe_cnt].dout.wb.wb_htaps_luma = 1; |
| pipes[pipe_cnt].dout.wb.wb_vtaps_luma = 1; |
| pipes[pipe_cnt].dout.wb.wb_htaps_chroma = wb_info->dwb_params.scaler_taps.h_taps_c; |
| pipes[pipe_cnt].dout.wb.wb_vtaps_chroma = wb_info->dwb_params.scaler_taps.v_taps_c; |
| pipes[pipe_cnt].dout.wb.wb_hratio = 1.0; |
| pipes[pipe_cnt].dout.wb.wb_vratio = 1.0; |
| if (wb_info->dwb_params.out_format == dwb_scaler_mode_yuv420) { |
| if (wb_info->dwb_params.output_depth == DWB_OUTPUT_PIXEL_DEPTH_8BPC) |
| pipes[pipe_cnt].dout.wb.wb_pixel_format = dm_420_8; |
| else |
| pipes[pipe_cnt].dout.wb.wb_pixel_format = dm_420_10; |
| } else { |
| pipes[pipe_cnt].dout.wb.wb_pixel_format = dm_444_32; |
| } |
| |
| pipe_cnt++; |
| } |
| } |