diff options
| author | George Shen <george.shen@amd.com> | 2024-03-19 03:31:26 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2024-04-30 16:46:23 +0300 |
| commit | b01d98caba5dabf94721ff1c807ce2470bd1354c (patch) | |
| tree | bfc6dd46e6872b9805f248b9d5d4a255f2f360f0 /drivers/gpu/drm/amd | |
| parent | 8acb83689258a606a43940191156ed1b24733a94 (diff) | |
| download | linux-b01d98caba5dabf94721ff1c807ce2470bd1354c.tar.xz | |
drm/amd/display: Skip SST ACT polling when sink_count is 0
[Why]
Upon disconnecting a UHBR SST display, the disconnection and the
SetTimings to disable the display can occur such that link_set_dpms_off
occurs after the disconnection has already processed
(link->type is dc_connection_none). Thus, the AUX related
operations should be skipped when clearing the payload allocation table.
Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: George Shen <george.shen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/link_dpms.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c index b53ad18dbfbc..d5b4549a8715 100644 --- a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c +++ b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c @@ -1158,12 +1158,13 @@ static bool poll_for_allocation_change_trigger(struct dc_link *link) int i; const int act_retries = 30; enum act_return_status result = ACT_FAILED; + enum dc_connection_type display_connected = (link->type != dc_connection_none); union payload_table_update_status update_status = {0}; union lane_status dpcd_lane_status[LANE_COUNT_DP_MAX]; union lane_align_status_updated lane_status_updated; DC_LOGGER_INIT(link->ctx->logger); - if (link->aux_access_disabled) + if (!display_connected || link->aux_access_disabled) return true; for (i = 0; i < act_retries; i++) { get_lane_status(link, link->cur_link_settings.lane_count, dpcd_lane_status, &lane_status_updated); @@ -1512,6 +1513,7 @@ static bool write_128b_132b_sst_payload_allocation_table( union payload_table_update_status update_status = { 0 }; const uint32_t max_retries = 30; uint32_t retries = 0; + enum dc_connection_type display_connected = (link->type != dc_connection_none); DC_LOGGER_INIT(link->ctx->logger); if (allocate) { @@ -1529,7 +1531,7 @@ static bool write_128b_132b_sst_payload_allocation_table( proposed_table->stream_allocations[0].slot_count = req_slot_count; proposed_table->stream_allocations[0].vcp_id = vc_id; - if (link->aux_access_disabled) + if (!display_connected || link->aux_access_disabled) return true; /// Write DPCD 2C0 = 1 to start updating |