From: Aurabindo Pillai <aurabindo.pillai@xxxxxxx>
Unconditionally reading DP tunneling support results in extraneous
errors messages on certain devices. Fix this by guarding the DPCD read
for DP tunneling support for USB4 DPIA endpoints.
Reviewed-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@xxxxxxx>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@xxxxxxx>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx>
---
.../amd/display/dc/link/protocols/link_dp_capability.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
index 72ef0c3a7ebd..9dabaf682171 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
@@ -1633,9 +1633,11 @@ static bool retrieve_link_cap(struct dc_link *link)
}
/* Read DP tunneling information. */
- status = dpcd_get_tunneling_device_data(link);
- if (status != DC_OK)
- dm_error("%s: Read tunneling device data failed.\n", __func__);
+ if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) {
+ status = dpcd_get_tunneling_device_data(link);
+ if (status != DC_OK)
+ dm_error("%s: Read tunneling device data failed.\n", __func__);
+ }
dpcd_set_source_specific_data(link);
/* Sink may need to configure internals based on vendor, so allow some
--
2.46.1
