91 lines
3.1 KiB
C
91 lines
3.1 KiB
C
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/*
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* Copyright 2017 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: AMD
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*
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*/
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#include "rc_calc.h"
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/**
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* calc_rc_params - reads the user's cmdline mode
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* @rc: DC internal DSC parameters
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* @pps: DRM struct with all required DSC values
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*
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* This function expects a drm_dsc_config data struct with all the required DSC
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* values previously filled out by our driver and based on this information it
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* computes some of the DSC values.
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*
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* @note This calculation requires float point operation, most of it executes
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* under kernel_fpu_{begin,end}.
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*/
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void calc_rc_params(struct rc_params *rc, const struct drm_dsc_config *pps)
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{
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enum colour_mode mode;
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enum bits_per_comp bpc;
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bool is_navite_422_or_420;
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u16 drm_bpp = pps->bits_per_pixel;
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int slice_width = pps->slice_width;
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int slice_height = pps->slice_height;
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mode = pps->convert_rgb ? CM_RGB : (pps->simple_422 ? CM_444 :
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(pps->native_422 ? CM_422 :
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pps->native_420 ? CM_420 : CM_444));
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bpc = (pps->bits_per_component == 8) ? BPC_8 : (pps->bits_per_component == 10)
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? BPC_10 : BPC_12;
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is_navite_422_or_420 = pps->native_422 || pps->native_420;
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DC_FP_START();
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_do_calc_rc_params(rc, mode, bpc, drm_bpp, is_navite_422_or_420,
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slice_width, slice_height,
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pps->dsc_version_minor);
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DC_FP_END();
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}
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/**
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* calc_dsc_bytes_per_pixel - calculate bytes per pixel
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* @pps: DRM struct with all required DSC values
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*
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* Based on the information inside drm_dsc_config, this function calculates the
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* total of bytes per pixel.
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*
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* @note This calculation requires float point operation, most of it executes
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* under kernel_fpu_{begin,end}.
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*
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* Return:
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* Return the number of bytes per pixel
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*/
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u32 calc_dsc_bytes_per_pixel(const struct drm_dsc_config *pps)
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{
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u32 ret;
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u16 drm_bpp = pps->bits_per_pixel;
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int slice_width = pps->slice_width;
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bool is_navite_422_or_420 = pps->native_422 || pps->native_420;
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DC_FP_START();
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ret = _do_bytes_per_pixel_calc(slice_width, drm_bpp,
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is_navite_422_or_420);
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DC_FP_END();
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return ret;
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}
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