From: Xiaogang.Chen <xiaogang.chen@amd.com>
To: <amd-gfx@lists.freedesktop.org>, <harry.wentland@amd.com>,
<dri-devel@lists.freedesktop.org>, <airlied@linux.ie>
Cc: xiaogang.chen@amd.com
Subject: [PATCH 1/2] drm: distinguish return value of drm_dp_check_and_send_link_address.
Date: Mon, 4 Jan 2021 00:01:37 -0600 [thread overview]
Message-ID: <1609740098-32603-1-git-send-email-xiaogang.chen@amd.com> (raw)
From: Xiaogang Chen <xiaogang.chen@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.chen@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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next reply other threads:[~2021-01-04 6:02 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-04 6:01 Xiaogang.Chen [this message]
2021-01-04 6:01 ` [PATCH 2/2] drm/amdgpu/display: buffer INTERRUPT_LOW_IRQ_CONTEXT interrupt work Xiaogang.Chen
2021-01-12 6:37 ` Chen, Xiaogang
2021-01-13 4:54 ` Andrey Grodzovsky
2021-01-14 5:11 ` Chen, Xiaogang
2021-01-14 7:24 ` Andrey Grodzovsky
2021-01-15 7:21 ` Chen, Xiaogang
2021-01-19 22:29 ` Andrey Grodzovsky
2021-01-22 20:55 ` Chen, Xiaogang
2021-02-26 22:52 ` Aurabindo Pillai
2021-01-12 6:36 ` [PATCH 1/2] drm: distinguish return value of drm_dp_check_and_send_link_address Chen, Xiaogang
2021-01-12 9:21 ` Simon Ser
2021-01-12 14:45 ` Simon Ser
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