drm/amd/display: Limit max link cap with LTTPR caps

[Why]
Max link rate should be limited to the maximum link rate support by any
LTTPR that are connected, including when operating in transparent mode.

[How]
Include transparent mode when factoring in LTTPR max supported link
rate.

Tested-by: Daniel Wheeler <[email protected]>
Reviewed-by: Wesley Chalmers <[email protected]>
Acked-by: Rodrigo Siqueira <[email protected]>
Signed-off-by: George Shen <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: George Shen

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

@@ -2873,7 +2873,7 @@ static struct dc_link_settings get_max_link_cap(struct dc_link *link)
 	 * account for lttpr repeaters cap
 	 * notes: repeaters do not snoop in the DPRX Capabilities addresses (3.6.3).
 	 */
-	if (link->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) {
+	if (link->lttpr_mode != LTTPR_MODE_NON_LTTPR) {
 		if (link->dpcd_caps.lttpr_caps.max_lane_count < max_link_cap.lane_count)
 			max_link_cap.lane_count = link->dpcd_caps.lttpr_caps.max_lane_count;