[PATCH 01/25] drm/amd/display: Null check clock source.

[Harry Wentland]

From: Yongqiang Sun <yongqiang.sun at amd.com>

Change-Id: Ifcec8c22d0df9434a470e2abc1bc77f503d9c0f7
Signed-off-by: Yongqiang Sun <yongqiang.sun at amd.com>
Acked-by: Harry Wentland <Harry.Wentland at amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c
index 55d96656e54b..b0ac94d673c4 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c
@@ -74,7 +74,8 @@ void dp_enable_link_phy(
 		if (pipes[i].stream != NULL &&
 			pipes[i].stream->sink != NULL &&
 			pipes[i].stream->sink->link == link) {
-			if (pipes[i].clock_source->id != CLOCK_SOURCE_ID_DP_DTO) {
+			if (pipes[i].clock_source != NULL &&
+					pipes[i].clock_source->id != CLOCK_SOURCE_ID_DP_DTO) {
 				pipes[i].clock_source = dp_cs;
 				pipes[i].pix_clk_params.requested_pix_clk =
 						pipes[i].stream->public.timing.pix_clk_khz;
-- 
2.9.3