[AMD Official Use Only - Internal Distribution Only]
Any comment?
-----Original Message-----
From: Xiaogang.Chen <xiaogang.c...@amd.com>
Sent: Monday, January 4, 2021 12:02 AM
To: amd-gfx@lists.freedesktop.org; Wentland, Harry <harry.wentl...@amd.com>;
dri-de...@lists.freedesktop.org; airl...@linux.ie
Cc: Chen, Xiaogang <xiaogang.c...@amd.com>
Subject: [PATCH 1/2] drm: distinguish return value of
drm_dp_check_and_send_link_address.
From: Xiaogang Chen <xiaogang.c...@amd.com>
drm_dp_check_and_send_link_address discovers MST device topology.
It can return both positive and negative values. When it returns positive
values there is no error found. If it returns negative values there is error
found, such as get NAK , timeout, etc. Following drm_kms_helper_hotplug_event
should be called when drm_dp_check_and_send_link_address returns positive value.
Signed-off-by: Xiaogang Chen <xiaogang.c...@amd.com>
---
drivers/gpu/drm/drm_dp_mst_topology.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c
b/drivers/gpu/drm/drm_dp_mst_topology.c
index 17dbed0..3ef5206 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -2650,7 +2650,7 @@ static void drm_dp_mst_link_probe_work(struct work_struct
*work)
drm_dp_mst_topology_put_mstb(mstb);
mutex_unlock(&mgr->probe_lock);
- if (ret)
+ if (ret > 0)
drm_kms_helper_hotplug_event(dev);
}
--
2.7.4
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