| |
| /* |
| * Copyright 2017 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 "rc_calc.h" |
| |
| /** |
| * calc_rc_params - reads the user's cmdline mode |
| * @rc: DC internal DSC parameters |
| * @pps: DRM struct with all required DSC values |
| * |
| * This function expects a drm_dsc_config data struct with all the required DSC |
| * values previously filled out by our driver and based on this information it |
| * computes some of the DSC values. |
| * |
| * @note This calculation requires float point operation, most of it executes |
| * under kernel_fpu_{begin,end}. |
| */ |
| void calc_rc_params(struct rc_params *rc, const struct drm_dsc_config *pps) |
| { |
| enum colour_mode mode; |
| enum bits_per_comp bpc; |
| bool is_navite_422_or_420; |
| u16 drm_bpp = pps->bits_per_pixel; |
| int slice_width = pps->slice_width; |
| int slice_height = pps->slice_height; |
| |
| mode = pps->convert_rgb ? CM_RGB : (pps->simple_422 ? CM_444 : |
| (pps->native_422 ? CM_422 : |
| pps->native_420 ? CM_420 : CM_444)); |
| bpc = (pps->bits_per_component == 8) ? BPC_8 : (pps->bits_per_component == 10) |
| ? BPC_10 : BPC_12; |
| |
| is_navite_422_or_420 = pps->native_422 || pps->native_420; |
| |
| DC_FP_START(); |
| _do_calc_rc_params(rc, mode, bpc, drm_bpp, is_navite_422_or_420, |
| slice_width, slice_height, |
| pps->dsc_version_minor); |
| DC_FP_END(); |
| } |
| |
| /** |
| * calc_dsc_bytes_per_pixel - calculate bytes per pixel |
| * @pps: DRM struct with all required DSC values |
| * |
| * Based on the information inside drm_dsc_config, this function calculates the |
| * total of bytes per pixel. |
| * |
| * @note This calculation requires float point operation, most of it executes |
| * under kernel_fpu_{begin,end}. |
| * |
| * Return: |
| * Return the number of bytes per pixel |
| */ |
| u32 calc_dsc_bytes_per_pixel(const struct drm_dsc_config *pps) |
| |
| { |
| u32 ret; |
| u16 drm_bpp = pps->bits_per_pixel; |
| int slice_width = pps->slice_width; |
| bool is_navite_422_or_420 = pps->native_422 || pps->native_420; |
| |
| DC_FP_START(); |
| ret = _do_bytes_per_pixel_calc(slice_width, drm_bpp, |
| is_navite_422_or_420); |
| DC_FP_END(); |
| return ret; |
| } |