drm/amd/display: handle "18" case in TruncToValidBPP

Handle 18 DecimalBPP like other cases

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Roman Li <Roman.Li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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 fd707e7..ba77957 100644 (file)
--- 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
@@ -3380,6 +3380,8 @@ static unsigned int TruncToValidBPP(
                                return 30;
                        else if (DecimalBPP >= 24 && (DesiredBPP == 0 || DesiredBPP == 24))
                                return 24;
+                       else if (DecimalBPP >= 18 && (DesiredBPP == 0 || DesiredBPP == 18))
+                               return 18;
                        else
                                return BPP_INVALID;
                }