[PATCH 28/30] drm/amd/display: check for null before calling is_blanked

[Harry Wentland]

From: Yue Hin Lau <Yuehin.Lau at amd.com>

Signed-off-by: Yue Hin Lau <Yuehin.Lau at amd.com>
Reviewed-by: Eric Bernstein <Eric.Bernstein at amd.com>
Acked-by: Harry Wentland <harry.wentland at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index ab875ea8aba4..35e84ed031de 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -580,7 +580,7 @@ static void program_timing_sync(
 		for (j = 0; j < group_size; j++) {
 			struct pipe_ctx *temp;
 
-			if (!pipe_set[j]->stream_res.tg->funcs->is_blanked(pipe_set[j]->stream_res.tg)) {
+			if (pipe_set[j]->stream_res.tg->funcs->is_blanked && !pipe_set[j]->stream_res.tg->funcs->is_blanked(pipe_set[j]->stream_res.tg)) {
 				if (j == 0)
 					break;
 
@@ -593,7 +593,7 @@ static void program_timing_sync(
 
 		/* remove any other unblanked pipes as they have already been synced */
 		for (j = j + 1; j < group_size; j++) {
-			if (!pipe_set[j]->stream_res.tg->funcs->is_blanked(pipe_set[j]->stream_res.tg)) {
+			if (pipe_set[j]->stream_res.tg->funcs->is_blanked && !pipe_set[j]->stream_res.tg->funcs->is_blanked(pipe_set[j]->stream_res.tg)) {
 				group_size--;
 				pipe_set[j] = pipe_set[group_size];
 				j--;
-- 
2.14.1