From: "Shen, George" <George.Shen@xxxxxxx>
[Why]
Certain configurations will result in link encoder
to not be assigned to the link at the time we apply
cable ID logic. We should skip it in those cases.
[How]
Check if link_enc is not null before applying
cable ID.
Reviewed-by: Wenjing Liu <Wenjing.Liu@xxxxxxx>
Acked-by: Stylon Wang <stylon.wang@xxxxxxx>
Signed-off-by: George Shen <george.shen@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index 8cfc9a8197df..117183b5ab44 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -6327,7 +6327,12 @@ void dpcd_set_source_specific_data(struct dc_link *link)
void dpcd_update_cable_id(struct dc_link *link)
{
- if (!link->link_enc->features.flags.bits.IS_UHBR10_CAPABLE ||
+ struct link_encoder *link_enc = NULL;
+
+ link_enc = link_enc_cfg_get_link_enc(link);
+
+ if (!link_enc ||
+ !link_enc->features.flags.bits.IS_UHBR10_CAPABLE ||
link->dprx_status.cable_id_updated)
return;
--
2.34.1
