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
dcn20_populate_dml_writeback_from_context(struct dc * dc,struct resource_context * res_ctx,display_e2e_pipe_params_st * pipes)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