From: Lyude Paul Date: Fri, 3 Apr 2020 19:58:29 +0000 (-0400) Subject: drm/dp_mst: Print errors on ACT timeouts X-Git-Tag: v5.15~303^2~28^2~2999 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4d1b58d5eafd6acbc728e41263a7de1b5e8b781a;p=platform%2Fkernel%2Flinux-starfive.git drm/dp_mst: Print errors on ACT timeouts Although it's not unexpected for drm_dp_check_act_status() to fail due to DPCD read failures (as the hub may have just been unplugged suddenly), timeouts are a bit more worrying as they either mean we need a longer timeout value, or we aren't setting up payload allocations properly. So, let's start printing errors on timeouts. Signed-off-by: Lyude Paul Cc: Sean Paul Reviewed-by: Sean Paul Link: https://patchwork.freedesktop.org/patch/msgid/20200406221253.1307209-5-lyude@redhat.com --- diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index 8942ab9..6529b47 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -4477,10 +4477,14 @@ int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr) status & DP_PAYLOAD_ACT_HANDLED || status < 0, 200, timeout_ms * USEC_PER_MSEC); if (ret < 0 && status >= 0) { - DRM_DEBUG_KMS("Failed to get ACT after %dms, last status: %02x\n", - timeout_ms, status); + DRM_ERROR("Failed to get ACT after %dms, last status: %02x\n", + timeout_ms, status); return -EINVAL; } else if (status < 0) { + /* + * Failure here isn't unexpected - the hub may have + * just been unplugged + */ DRM_DEBUG_KMS("Failed to read payload table status: %d\n", status); return status;