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drm/amd/display: Renoir chroma viewport WA change formula

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[why]
we want to increase the pte row plus 1 line if chroma viewport
height is integer multiple of the pte row height

[how]
instead of ceiling viewport height, we floor it. this allows
us to accommodate both cases: those where the chroma viewport
height is integer multiple of the pte row height and those where
it is not

Signed-off-by: Joseph Gravenor <joseph.gravenor@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Joseph Gravenor 2019-10-17 11:56:34 -04:00 • committed by Alex Deucher
parent 8c8048f207
commit e6b268dde4
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubp.c
View file

@ -204,8 +204,8 @@ void hubp21_set_viewport(
PTE_ROW_HEIGHT_LINEAR, &pte_row_height);
pte_row_height = 1 << (pte_row_height + 3);
pte_rows = (viewport_c->height + pte_row_height - 1) / pte_row_height;
patched_viewport_height = pte_rows * pte_row_height + 3;
pte_rows = (viewport_c->height / pte_row_height) + 1;
patched_viewport_height = pte_rows * pte_row_height + 1;
}