Anson Jacob 54718747a6 drm/amd/display: Fix UBSAN: shift-out-of-bounds warning ... [Why] On NAVI14 CONFIG_UBSAN reported shift-out-of-bounds at display_rq_dlg_calc_20v2.c:304:38 rq_param->misc.rq_c.blk256_height is 0 when chroma(*_c) is invalid. dml_log2 returns -1023 for log2(0), although log2(0) is undefined. Which ended up as: rq_param->dlg.rq_c.swath_height = 1 << -1023 [How] Fix applied on all dml versions. 1. Ensure dml_log2 is only called if the argument is greater than 0. 2. Subtract req128_l/req128_c from log2_swath_height_l/log2_swath_height_c only when it is greater than 0. Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Anson Jacob <Anson.Jacob@amd.com> Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com> Reviewed-by: Jun Lei <Jun.Lei@amd.com> Acked-by: Solomon Chiu <solomon.chiu@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>		2021-04-09 16:41:21 -04:00
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display_mode_vba_30.c	drm/amd/display: Fix HSplit causing increase in DSC Slice Count	2021-03-02 14:07:46 -05:00
display_mode_vba_30.h
display_rq_dlg_calc_30.c	drm/amd/display: Fix UBSAN: shift-out-of-bounds warning	2021-04-09 16:41:21 -04:00
display_rq_dlg_calc_30.h	drm: amd/display: fix spelling of "function"	2020-09-15 17:52:42 -04:00