Commit 0b1f04d8 authored by Sung Lee's avatar Sung Lee Committed by Alex Deucher
Browse files

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: default avatarSung Lee <sung.lee@amd.com>
Reviewed-by: default avatarDmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: default avatarRodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent f2cd2e5d

drivers/gpu/drm/amd/display/dc/dml/dcn21/display_mode_vba_21.c

+2 −2
Original line number Diff line number Diff line
@@ -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]