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authorZhikai Zhai <[email protected]>2024-01-29 17:02:18 +0800
committerAlex Deucher <[email protected]>2024-02-15 14:18:43 -0500
commit94b38b895dec8c0ef093140a141e191b60ff614c (patch)
treef66c1e753d384873f2e4fb65486ceb8126dcf481
parent916361685319098f696b798ef1560f69ed96e934 (diff)
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 <[email protected]> Cc: Alex Deucher <[email protected]> Cc: [email protected] Reviewed-by: Wenjing Liu <[email protected]> Acked-by: Aurabindo Pillai <[email protected]> Signed-off-by: Zhikai Zhai <[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/protocols/link_dp_training.c5
1 files changed, 4 insertions, 1 deletions
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 5a0b04518956..16a62e018712 100644
--- 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