From: Sung Lee Date: Mon, 30 Mar 2020 21:16:23 +0000 (-0400) Subject: drm/amd/display: Cast int to float before division X-Git-Tag: block-5.8-2020-06-11~21^2~15^2~54 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=0b1f04d8876bd1397d3c2c837c3ea4cc77773698;p=linux-block.git drm/amd/display: Cast int to float before division [Why]: Some inputs to dml_ceil have it dividied by int which causes a truncation. This loss of precision means the ceil function becomes redundant and does not round up. [How]: Cast parameter to float before division. Signed-off-by: Sung Lee Reviewed-by: Dmytro Laktyushkin Acked-by: Rodrigo Siqueira Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn21/display_mode_vba_21.c b/drivers/gpu/drm/amd/display/dc/dml/dcn21/display_mode_vba_21.c index e6617c958bb8..5bc80b6084da 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/dcn21/display_mode_vba_21.c +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn21/display_mode_vba_21.c @@ -5944,7 +5944,7 @@ static void CalculateMetaAndPTETimes( * PixelPTEReqHeightY[k]; } dpte_groups_per_row_luma_ub = dml_ceil( - dpte_row_width_luma_ub[k] / dpte_group_width_luma, + (float) dpte_row_width_luma_ub[k] / dpte_group_width_luma, 1); time_per_pte_group_nom_luma[k] = DST_Y_PER_PTE_ROW_NOM_L[k] * HTotal[k] / PixelClock[k] / dpte_groups_per_row_luma_ub; @@ -5968,7 +5968,7 @@ static void CalculateMetaAndPTETimes( * PixelPTEReqHeightC[k]; } dpte_groups_per_row_chroma_ub = dml_ceil( - dpte_row_width_chroma_ub[k] + (float) dpte_row_width_chroma_ub[k] / dpte_group_width_chroma, 1); time_per_pte_group_nom_chroma[k] = DST_Y_PER_PTE_ROW_NOM_C[k]