diff options
| author | George Shen <george.shen@amd.com> | 2024-05-23 16:01:21 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2024-06-14 16:17:15 -0400 |
| commit | 1b51220dc28cd34f80467acaff60294348cf6675 (patch) | |
| tree | 50dfc23469f10c3f7a42b066bf707085830c388d | |
| parent | e8eff33f287274e731c5a655d8b111006aed3e98 (diff) | |
drm/amd/display: Ignore UHBR13.5 cable ID cap for passive cable max link rate
[Why]
Passive DP40 cables were updated in the latest DP spec to support
UHBR13.5 link rate. Current max link rate logic checks against the
cable ID DPCD even for passive cables.
[How]
Ignore UHBR13.5 cable ID DPCD cap in get_max_link_rate logic.
Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Acked-by: Zaeem Mohamed <zaeem.mohamed@amd.com>
Signed-off-by: George Shen <george.shen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c | 3 |
1 files changed, 2 insertions, 1 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 1ff9876e3ca3..41bdadc585b3 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 @@ -2124,7 +2124,8 @@ struct dc_link_settings dp_get_max_link_cap(struct dc_link *link) if (cable_max_link_rate < max_link_cap.link_rate) max_link_cap.link_rate = cable_max_link_rate; - if (!link->dpcd_caps.cable_id.bits.UHBR13_5_CAPABILITY) + if (!link->dpcd_caps.cable_id.bits.UHBR13_5_CAPABILITY && + link->dpcd_caps.cable_id.bits.CABLE_TYPE >= 2) is_uhbr13_5_supported = false; } |