This is a trimmed down version of
https://patchwork.freedesktop.org/series/46637/
with all of the review comments addressed.
The last version of this series had fixes for the i2c and DP aux busses to ensure that the GPU would be turned on whenever anything tried to access the i2c/aux busses. Unfortunately: one of the fixes apparently contained some very incorrect usage of Linux's runtime PM interface in order to prevent runtime suspend/resume requests coming from within nouveau's suspend/resume callbacks from deadlocking the system.
Turns out: fixing the i2c/dp aux problem is a lot harder then I originally anticipated. We either need to come up with helpers for DRM that work around the PM core, which is really not ideal, or come up with a new feature for the RPM core that allows us to inhibit suspend/resume callbacks. The former seems to be somewhat trivial to implement, but coming up with a decent interface for that is going to take a bit more time and I'd much rather have issues causing deadlocks get fixed first. This means that drm_dp_aux_dev is going to be broken on nouveau for laptops with hybrid GPUs using RPM, but it was already broken before anyhow.
So: this just contains the seriously important fixes that will stop people's machines from crashing very hard. Hopefully I can come up with a solution to the i2c/aux problem soon after fixing some other glaring MST bugs nouveau currently has.
Lyude Paul (2): drm/fb_helper: Add drm_fb_helper_output_poll_changed_with_rpm() drm/probe_helper: Add drm_helper_probe_single_connector_modes_with_rpm()
drivers/gpu/drm/drm_fb_helper.c | 23 +++++++++++++++ drivers/gpu/drm/drm_probe_helper.c | 31 +++++++++++++++++++++ drivers/gpu/drm/nouveau/dispnv50/disp.c | 4 +-- drivers/gpu/drm/nouveau/nouveau_connector.c | 4 +-- include/drm/drm_crtc_helper.h | 7 +++-- include/drm/drm_fb_helper.h | 5 ++++ 6 files changed, 67 insertions(+), 7 deletions(-)