When there is a preferred link rate setting, it needs to be
applied to both the current and initial link rate.
This was regressed by a "coding style" fix, which caused
the current link rate to not respect the preferred value.
This commit restores the functionality of NUTMEG,
the DP bridge encoder found on old APUs such as Kaveri.
Fixes: b74322eea36b ("drm/amd/display: Fix coding style issue")
Cc: Chuanyu Tseng <[email protected]>
Signed-off-by: Timur Kristóf <[email protected]>
---
.../drm/amd/display/dc/link/protocols/link_dp_capability.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
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 817b4010edcbe..f44c13300a59c 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
@@ -750,8 +750,10 @@ static bool decide_dp_link_settings(struct dc_link *link,
struct dc_link_setting
if (req_bw > dp_link_bandwidth_kbps(link, &link->verified_link_cap))
return false;
- if (link->preferred_link_setting.link_rate != LINK_RATE_UNKNOWN)
+ if (link->preferred_link_setting.link_rate != LINK_RATE_UNKNOWN) {
initial_link_setting.link_rate =
link->preferred_link_setting.link_rate;
+ current_link_setting.link_rate =
link->preferred_link_setting.link_rate;
+ }
/* search for the minimum link setting that:
* 1. is supported according to the link training result
--
2.53.0
