aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorIlya Bakoulin <[email protected]>2024-04-17 14:21:28 -0400
committerAlex Deucher <[email protected]>2024-04-30 09:56:57 -0400
commita8baec4623aedf36d50767627f6eae5ebf07c6fb (patch)
tree48e3e5d48e89e32de76193f41290453f71e6efe3
parent523ee6f4419bbeccbe43399d999f37381b5958c7 (diff)
drm/amd/display: Fix FEC_READY write on DP LT
[Why/How] We can miss writing FEC_READY in some cases before LT start, which violates DP spec. Remove the condition guarding the DPCD write so that the write happens unconditionally. Cc: Mario Limonciello <[email protected]> Cc: Alex Deucher <[email protected]> Cc: [email protected] Reviewed-by: Wenjing Liu <[email protected]> Acked-by: Wayne Lin <[email protected]> Signed-off-by: Ilya Bakoulin <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]>
-rw-r--r--drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.c
index 5cbf5f93e584..bafa52a0165a 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.c
@@ -151,16 +151,14 @@ enum dc_status dp_set_fec_ready(struct dc_link *link, const struct link_resource
return DC_NOT_SUPPORTED;
if (ready && dp_should_enable_fec(link)) {
- if (link->fec_state == dc_link_fec_not_ready) {
- fec_config = 1;
+ fec_config = 1;
- status = core_link_write_dpcd(link, DP_FEC_CONFIGURATION,
- &fec_config, sizeof(fec_config));
+ status = core_link_write_dpcd(link, DP_FEC_CONFIGURATION,
+ &fec_config, sizeof(fec_config));
- if (status == DC_OK) {
- link_enc->funcs->fec_set_ready(link_enc, true);
- link->fec_state = dc_link_fec_ready;
- }
+ if (status == DC_OK) {
+ link_enc->funcs->fec_set_ready(link_enc, true);
+ link->fec_state = dc_link_fec_ready;
}
} else {
if (link->fec_state == dc_link_fec_ready) {