diff options
| author | Zhikai Zhai <zhikai.zhai@amd.com> | 2024-01-29 12:02:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-02-23 11:25:07 +0300 |
| commit | b9e373ed8d9cefd56bf2ff2dd2914105bf53bd4e (patch) | |
| tree | 32cfab59e2efef29569d88fd50c8569e6736a395 /drivers/gpu/drm/amd/display/dc | |
| parent | c96a494c9b0fe257fc8a5f2a047d3eb46f02773a (diff) | |
| download | linux-b9e373ed8d9cefd56bf2ff2dd2914105bf53bd4e.tar.xz | |
drm/amd/display: Add align done check
commit 94b38b895dec8c0ef093140a141e191b60ff614c upstream.
[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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c | 5 |
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 |