drm/amd/display: Add align done check

[WHY]
We Double-check link status if training successful,
but miss the lane align status.

[HOW]
Add the lane align status check

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Zhikai Zhai <zhikai.zhai@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c
index 5a0b045..16a62e0 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c
@@ -517,6 +517,7 @@ enum link_training_result dp_check_link_loss_status(
 {
        enum link_training_result status = LINK_TRAINING_SUCCESS;
        union lane_status lane_status;
+       union lane_align_status_updated dpcd_lane_status_updated;
        uint8_t dpcd_buf[6] = {0};
        uint32_t lane;
 
@@ -532,10 +533,12 @@ enum link_training_result dp_check_link_loss_status(
                 * check lanes status
                 */
                lane_status.raw = dp_get_nibble_at_index(&dpcd_buf[2], lane);
+               dpcd_lane_status_updated.raw = dpcd_buf[4];
 
                if (!lane_status.bits.CHANNEL_EQ_DONE_0 ||
                        !lane_status.bits.CR_DONE_0 ||
-                       !lane_status.bits.SYMBOL_LOCKED_0) {
+                       !lane_status.bits.SYMBOL_LOCKED_0 ||
+                       !dp_is_interlane_aligned(dpcd_lane_status_updated)) {
                        /* if one of the channel equalization, clock
                         * recovery or symbol lock is dropped
                         * consider it as (link has been