From: Peichen Huang <peichen.hu...@amd.com>
[ Upstream commit 8a21da2842bb22b2b80e5902d0438030d729bfd3 ]
[WHY]
DP tunneling should not abort link train even bandwidth become
too low after downgrade. Otherwise, it would fail compliance test.
[HOW}
Do link train with downgrade settings even bandwidth is not enough
Reviewed-by: Cruise Hung <cruise.h...@amd.com>
Reviewed-by: Meenakshikumar Somasundaram <meenakshikumar.somasunda...@amd.com>
Signed-off-by: Peichen Huang <peichen.hu...@amd.com>
Signed-off-by: Tom Chung <chiahsuan.ch...@amd.com>
Tested-by: Daniel Wheeler <daniel.whee...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
.../gpu/drm/amd/display/dc/link/protocols/link_dp_training.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c
b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c
index 27b881f947e8b..9385a32a471b8 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c
@@ -1769,13 +1769,10 @@ bool perform_link_training_with_retries(
is_link_bw_min = ((cur_link_settings.link_rate <=
LINK_RATE_LOW) &&
(cur_link_settings.lane_count <=
LANE_COUNT_ONE));
- if (is_link_bw_low) {
+ if (is_link_bw_low)
DC_LOG_WARNING(
"%s: Link(%d) bandwidth too low after
fallback req_bw(%d) > link_bw(%d)\n",
__func__, link->link_index, req_bw,
link_bw);
-
- return false;
- }
}
msleep(delay_between_attempts);
--
2.39.5
