1 2 /* 3 * Copyright 2017 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 #include "rc_calc.h" 27 28 /** 29 * calc_rc_params - reads the user's cmdline mode 30 * @rc: DC internal DSC parameters 31 * @pps: DRM struct with all required DSC values 32 * 33 * This function expects a drm_dsc_config data struct with all the required DSC 34 * values previously filled out by our driver and based on this information it 35 * computes some of the DSC values. 36 * 37 * @note This calculation requires float point operation, most of it executes 38 * under kernel_fpu_{begin,end}. 39 */ 40 void calc_rc_params(struct rc_params *rc, const struct drm_dsc_config *pps) 41 { 42 #if defined(CONFIG_DRM_AMD_DC_DCN) 43 enum colour_mode mode; 44 enum bits_per_comp bpc; 45 bool is_navite_422_or_420; 46 u16 drm_bpp = pps->bits_per_pixel; 47 int slice_width = pps->slice_width; 48 int slice_height = pps->slice_height; 49 50 mode = pps->convert_rgb ? CM_RGB : (pps->simple_422 ? CM_444 : 51 (pps->native_422 ? CM_422 : 52 pps->native_420 ? CM_420 : CM_444)); 53 bpc = (pps->bits_per_component == 8) ? BPC_8 : (pps->bits_per_component == 10) 54 ? BPC_10 : BPC_12; 55 56 is_navite_422_or_420 = pps->native_422 || pps->native_420; 57 58 DC_FP_START(); 59 _do_calc_rc_params(rc, mode, bpc, drm_bpp, is_navite_422_or_420, 60 slice_width, slice_height, 61 pps->dsc_version_minor); 62 DC_FP_END(); 63 #endif 64 } 65