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drm/amd/display: Fix underflow when setting underscan on DCN401

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[WHY & HOW]
When underscan is set through xrandr, it causes the stream destination
rect to change in a way it becomes complicated to handle the calculations
for subvp. Since this is a corner case, disable subvp when underscan is
set.

Fix the existing check that is supposed to catch this corner case by
adding a check based on the parameters in the stream

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Aurabindo Pillai
2024-09-03 10:10:44 -04:00
committed by Alex Deucher
parent b6499840ca
commit f510dd5c21
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/amd/display/dc/dml2/dml21/dml21_translation_helper.c
View File

@@ -858,7 +858,9 @@ static void populate_dml21_plane_config_from_plane_state(struct dml2_context *dm
plane->immediate_flip = plane_state->flip_immediate;
plane->composition.rect_out_height_spans_vactive = plane_state->dst_rect.height >= stream->timing.v_addressable;
plane->composition.rect_out_height_spans_vactive =
plane_state->dst_rect.height >= stream->timing.v_addressable &&
stream->dst.height >= stream->timing.v_addressable;
}
//TODO : Could be possibly moved to a common helper layer.