[PATCH 15/32] drm/amd/display: fix YUV video color corruption in DCN401

[Zaeem Mohamed]

From: Samson Tam <samson.tam at amd.com>

[Why]
Missing check causes sequence error which results in chroma
 filter coefficients not being updated in certain modes
 when we display YUV video in fullscreen.  This results in
 color corruption in video

[How]
Add back chroma_coef_mode check in dscl_set_scl_filter
 so that filter coefficients are calculated and updated when
 we have YUV surface

Reviewed-by: Alvin Lee <alvin.lee2 at amd.com>
Acked-by: Zaeem Mohamed <zaeem.mohamed at amd.com>
Signed-off-by: Samson Tam <samson.tam at amd.com>
---
 .../amd/display/dc/dpp/dcn401/dcn401_dpp_dscl.c  | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dpp/dcn401/dcn401_dpp_dscl.c b/drivers/gpu/drm/amd/display/dc/dpp/dcn401/dcn401_dpp_dscl.c
index 6cb3fa4b585c..505929800426 100644
--- a/drivers/gpu/drm/amd/display/dc/dpp/dcn401/dcn401_dpp_dscl.c
+++ b/drivers/gpu/drm/amd/display/dc/dpp/dcn401/dcn401_dpp_dscl.c
@@ -297,17 +297,21 @@ static void dpp401_dscl_set_scl_filter(
 	if ((dpp->base.ctx->dc->config.use_spl) && (!dpp->base.ctx->dc->debug.disable_spl)) {
 		filter_h = scl_data->dscl_prog_data.filter_h;
 		filter_v = scl_data->dscl_prog_data.filter_v;
-		filter_h_c = scl_data->dscl_prog_data.filter_h_c;
-		filter_v_c = scl_data->dscl_prog_data.filter_v_c;
+		if (chroma_coef_mode) {
+			filter_h_c = scl_data->dscl_prog_data.filter_h_c;
+			filter_v_c = scl_data->dscl_prog_data.filter_v_c;
+		}
 	} else {
 		filter_h = dpp401_dscl_get_filter_coeffs_64p(
 			scl_data->taps.h_taps, scl_data->ratios.horz);
 		filter_v = dpp401_dscl_get_filter_coeffs_64p(
 			scl_data->taps.v_taps, scl_data->ratios.vert);
-		filter_h_c = dpp401_dscl_get_filter_coeffs_64p(
-			scl_data->taps.h_taps_c, scl_data->ratios.horz_c);
-		filter_v_c = dpp401_dscl_get_filter_coeffs_64p(
-			scl_data->taps.v_taps_c, scl_data->ratios.vert_c);
+		if (chroma_coef_mode) {
+			filter_h_c = dpp401_dscl_get_filter_coeffs_64p(
+				scl_data->taps.h_taps_c, scl_data->ratios.horz_c);
+			filter_v_c = dpp401_dscl_get_filter_coeffs_64p(
+				scl_data->taps.v_taps_c, scl_data->ratios.vert_c);
+		}
 	}
 
 	h_2tap_hardcode_coef_en = scl_data->taps.h_taps < 3
-- 
2.34.1