Commit 2b7605d7 authored by Wesley Chalmers's avatar Wesley Chalmers Committed by Alex Deucher

drm/amd/display: Always write repeater mode regardless of LTTPR

[WHY]
SCR for DP2.0 requires that LT be performed with PHY_REPEATER_MODE
programmed to 0x55 (Transparent) whenever PHY_REPEATER_CNT is any value
other than 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, or 0x01.

[HOW]
Write Non-Transparent (0xAA) to PHY_REPEATER_MODE when LTTPRs detected and Non-Transparent is
requested.
Write Transparent in all other cases.
Signed-off-by: default avatarWesley Chalmers <Wesley.Chalmers@amd.com>
Reviewed-by: default avatarJun Lei <Jun.Lei@amd.com>
Acked-by: default avatarAnson Jacob <Anson.Jacob@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent ac62875e
......@@ -1618,11 +1618,10 @@ enum dc_status dpcd_configure_lttpr_mode(struct dc_link *link, struct link_train
{
enum dc_status status = DC_OK;
if (lt_settings->lttpr_mode == LTTPR_MODE_TRANSPARENT)
status = configure_lttpr_mode_transparent(link);
else if (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT)
if (lt_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT)
status = configure_lttpr_mode_non_transparent(link, lt_settings);
else
status = configure_lttpr_mode_transparent(link);
return status;
}
......
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