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| author | David (Dingchen) Zhang <dingchen.zhang@amd.com> | 2019-12-07 01:56:37 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-01-10 02:07:48 +0300 |
| commit | c908b1c4bb56c27fa6fbb48e2d3dbebdad366706 (patch) | |
| tree | b7408b6d4f0c8e4f0d708d9514c0980c6503c86d /drivers/gpu/drm/drm_dp_helper.c | |
| parent | 44be939ff7ac5858f0dbd8a2a4af1fe198e14db1 (diff) | |
| download | linux-c908b1c4bb56c27fa6fbb48e2d3dbebdad366706.tar.xz | |
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_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_dp_helper.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index 374cedc6c2ac..a5364b5192b8 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -979,6 +979,19 @@ static void drm_dp_aux_crc_work(struct work_struct *work) } /** + * drm_dp_remote_aux_init() - minimally initialise a remote aux channel + * @aux: DisplayPort AUX channel + * + * Used for remote aux channel in general. Merely initialize the crc work + * struct. + */ +void drm_dp_remote_aux_init(struct drm_dp_aux *aux) +{ + INIT_WORK(&aux->crc_work, drm_dp_aux_crc_work); +} +EXPORT_SYMBOL(drm_dp_remote_aux_init); + +/** * drm_dp_aux_init() - minimally initialise an aux channel * @aux: DisplayPort AUX channel * |