diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/link/link_dpms.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/link_dpms.c | 9 |
1 files changed, 9 insertions, 0 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 b8cfeb98e229..ec7de9c01fab 100644 --- a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c +++ b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c @@ -2548,6 +2548,15 @@ void link_set_dpms_on( if (pipe_ctx->stream->dpms_off) return; + /* For Dp tunneling link, a pending HPD means that we have a race condition between processing + * current link and processing the pending HPD. If we enable the link now, we may end up with a + * link that is not actually connected to a sink. So we skip enabling the link in this case. + */ + if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA && link->is_hpd_pending) { + DC_LOG_DEBUG("%s, Link%d HPD is pending, not enable it.\n", __func__, link->link_index); + return; + } + /* Have to setup DSC before DIG FE and BE are connected (which happens before the * link training). This is to make sure the bandwidth sent to DIG BE won't be * bigger than what the link and/or DIG BE can handle. VBID[6]/CompressedStream_flag |