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// 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++;
}
}
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