diff options
| author | Peichen Huang <[email protected]> | 2023-05-31 13:36:14 +0800 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2023-06-13 17:16:35 -0400 |
| commit | 7c5835bcb9176df94683396f1c0e5df6bf5094b3 (patch) | |
| tree | 286fe004ab561b12dbdc8b31fc86c5f840f3d00a | |
| parent | ea2062dd1f0384ae1b136d333ee4ced15bedae38 (diff) | |
drm/amd/display: limit DPIA link rate to HBR3
[Why]
DPIA doesn't support UHBR, driver should not enable UHBR
for dp tunneling
[How]
limit DPIA link rate to HBR3
Cc: Mario Limonciello <[email protected]>
Cc: Alex Deucher <[email protected]>
Cc: [email protected]
Acked-by: Stylon Wang <[email protected]>
Signed-off-by: Peichen Huang <[email protected]>
Reviewed-by: Mustapha Ghaddar <[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/link_detection.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_detection.c b/drivers/gpu/drm/amd/display/dc/link/link_detection.c index a131e30fd7d6..d471d58aba92 100644 --- a/drivers/gpu/drm/amd/display/dc/link/link_detection.c +++ b/drivers/gpu/drm/amd/display/dc/link/link_detection.c @@ -980,6 +980,11 @@ static bool detect_link_and_local_sink(struct dc_link *link, (link->dpcd_caps.dongle_type != DISPLAY_DONGLE_DP_HDMI_CONVERTER)) converter_disable_audio = true; + + /* limited link rate to HBR3 for DPIA until we implement USB4 V2 */ + if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA && + link->reported_link_cap.link_rate > LINK_RATE_HIGH3) + link->reported_link_cap.link_rate = LINK_RATE_HIGH3; break; } |