From: Lyude Paul <lyude@redhat.com>
To: dri-devel@lists.freedesktop.org
Cc: Sean Paul <sean@poorly.run>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/4] drm/dp_mst: Improve kdocs for drm_dp_check_act_status()
Date: Mon, 6 Apr 2020 18:12:50 -0400 [thread overview]
Message-ID: <20200406221253.1307209-2-lyude@redhat.com> (raw)
In-Reply-To: <20200406221253.1307209-1-lyude@redhat.com>
No functional changes.
Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: Sean Paul <sean@poorly.run>
---
drivers/gpu/drm/drm_dp_mst_topology.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 5b205aea58d4..828ca63cc576 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -4462,10 +4462,14 @@ static int drm_dp_dpcd_write_payload(struct drm_dp_mst_topology_mgr *mgr,
/**
- * drm_dp_check_act_status() - Check ACT handled status.
+ * drm_dp_check_act_status() - Polls for ACT handled status.
* @mgr: manager to use
*
- * Check the payload status bits in the DPCD for ACT handled completion.
+ * Tries waiting for the MST hub to finish updating it's payload table by
+ * polling for the ACT handled bit.
+ *
+ * Returns:
+ * 0 if the ACT was handled in time, negative error code on failure.
*/
int drm_dp_check_act_status(struct drm_dp_mst_topology_mgr *mgr)
{
--
2.25.1
next prev parent reply other threads:[~2020-04-06 22:13 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-06 22:12 [PATCH v2 0/4] drm/dp_mst: drm_dp_check_act_status() fixes Lyude Paul
2020-04-06 22:12 ` Lyude Paul [this message]
2020-04-06 22:12 ` [PATCH v2 2/4] drm/dp_mst: Reformat drm_dp_check_act_status() a bit Lyude Paul
2020-04-06 22:12 ` [PATCH v2 3/4] drm/dp_mst: Increase ACT retry timeout to 3s Lyude Paul
2020-04-07 17:42 ` Sean Paul
2020-04-06 22:12 ` [PATCH v2 4/4] drm/dp_mst: Print errors on ACT timeouts Lyude Paul
2020-04-07 17:43 ` Sean Paul
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