[PATCH v14 17/17] drm: bridge: analogix/dp: Fix the possible dead lock in bridge disable time

2016-02-15 Thread Yakir Yang
It may caused a dead lock if we flush the hpd work in bridge disable time. The normal flow would like: IN --> DRM IOCTL 1. Acquire crtc_ww_class_mutex (DRM IOCTL) IN --> analogix_dp_bridge 2. Acquire hpd work lock (Flush hpd work) 3. HPD work already in idle, no need

[PATCH v14 17/17] drm: bridge: analogix/dp: Fix the possible dead lock in bridge disable time

2016-02-15 Thread Yakir Yang
It may caused a dead lock if we flush the hpd work in bridge disable time. The normal flow would like: IN --> DRM IOCTL 1. Acquire crtc_ww_class_mutex (DRM IOCTL) IN --> analogix_dp_bridge 2. Acquire hpd work lock (Flush hpd work) 3. HPD work already in idle, no need