linux-kernel - [PATCH v2 0/4] drm/dp_mst: drm_dp_check_act

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Date:   Mon,  6 Apr 2020 18:12:49 -0400
From:   Lyude Paul <lyude@...hat.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     "Daniel Vetter" <daniel@...ll.ch>,
        "David Airlie" <airlied@...ux.ie>,
        "Maarten Lankhorst" <maarten.lankhorst@...ux.intel.com>,
        linux-kernel@...r.kernel.org,
        "Thomas Zimmermann" <tzimmermann@...e.de>,
        "Maxime Ripard" <mripard@...nel.org>,
        "Dave Airlie" <airlied@...hat.com>,
        "Todd Previte" <tprevite@...il.com>
Subject: [PATCH v2 0/4] drm/dp_mst: drm_dp_check_act_status() fixes

Noticed this while fixing some unrelated issues with NAKs being dropped
- we don't wait nearly long enough to receive ACTs from MST hubs in some
situations. Also, we take the time to refactor this function a bit.

This fixes some ACT timeouts I observed on an EVGA MST hub with i915.

Lyude Paul (4):
  drm/dp_mst: Improve kdocs for drm_dp_check_act_status()
  drm/dp_mst: Reformat drm_dp_check_act_status() a bit
  drm/dp_mst: Increase ACT retry timeout to 3s
  drm/dp_mst: Print errors on ACT timeouts

 drivers/gpu/drm/drm_dp_mst_topology.c | 71 +++++++++++++++++----------
 1 file changed, 44 insertions(+), 27 deletions(-)

-- 
2.25.1