diff options
| author | David (Dingchen) Zhang <dingchen.zhang@amd.com> | 2019-12-06 17:56:37 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-01-09 18:07:48 -0500 |
| commit | c908b1c4bb56c27fa6fbb48e2d3dbebdad366706 (patch) | |
| tree | b7408b6d4f0c8e4f0d708d9514c0980c6503c86d /drivers/gpu/drm/drm_dp_mst_topology.c | |
| parent | 44be939ff7ac5858f0dbd8a2a4af1fe198e14db1 (diff) | |
drm: add dp helper to initialize remote aux channel.
[why]
We need to minimally initialize the remote aux channel, e.g. the
crc work struct of remote aux to dump the sink's DPRX CRCs in MST
setup.
[how]
Add helper that only initializes the crc work struct of the remote
aux, hooke crc work queue to 'drm_dp_aux_crc_work'. Then call this
helper in DP MST port initialization.
This, plus David Francis' patch [1], fix the issue of MST remote
aux DPCD CRCs read.
[1] https://patchwork.kernel.org/patch/11217941/
Cc: Leo Li <sunpeng.li@amd.com>
Cc: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: David (Dingchen) Zhang <dingchen.zhang@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/drm_dp_mst_topology.c')
| -rw-r--r-- | drivers/gpu/drm/drm_dp_mst_topology.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index 7d174ba78eba..fa0656697c72 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -2200,6 +2200,9 @@ drm_dp_mst_add_port(struct drm_device *dev, port->aux.dev = dev->dev; port->aux.is_remote = true; + /* initialize the MST downstream port's AUX crc work queue */ + drm_dp_remote_aux_init(&port->aux); + /* * Make sure the memory allocation for our parent branch stays * around until our own memory allocation is released |