search for: drm_fb_helper_probe_connector_modes

...s is safe because the poll worker is only enabled while runtime active and we know that ->runtime_suspend waits for it to finish. Other contexts calling nouveau_connector_detect() do require a runtime PM ref, these comprise: status_store() drm sysfs interface ->fill_modes drm callback drm_fb_helper_probe_connector_modes() drm_mode_getconnector() nouveau_connector_hotplug() nouveau_display_hpd_work() nv17_tv_set_property() Stack trace for posterity: INFO: task kworker/0:1:58 blocked for more than 120 seconds. Workqueue: events output_poll_execute [drm_kms_helper] Call Trace: schedule+0x28/0x80...

...x45/0x4f [nouveau] [ 956.066579] [<f8869e3e>] ? nouveau_connector_detect+0x8c/0x21f [nouveau] [ 956.066579] [<c1104a96>] ? snprintf+0x19/0x1b [ 956.066579] [<f81565da>] ? drm_helper_probe_single_connector_modes+0xae/0x2a0 [drm_kms_helper] [ 956.066579] [<f8154589>] ? drm_fb_helper_probe_connector_modes+0x2f/0x40 [drm_kms_helper] [ 956.066579] [<f8155a9b>] ? drm_fb_helper_initial_config+0x175/0x1a4 [drm_kms_helper] [ 956.066579] [<f889fec8>] ? NVWriteVgaCrtc+0x79/0x99 [nouveau] [ 956.066579] [<f885bd48>] ? NVWriteVgaSeq+0x22/0x38 [nouveau] [ 956.066579] [<f886af86>]...

Fix a deadlock on hybrid graphics laptops that's been present since 2013: DRM drivers poll connectors in 10 sec intervals. The poll worker is stopped on ->runtime_suspend with cancel_delayed_work_sync(). However the poll worker invokes the DRM drivers' ->detect callbacks, which call pm_runtime_get_sync(). If the poll worker starts after runtime suspend has begun,

Hi all, First thing first: It works, I now no longer have a few dropped frames every 10s on my testbox here with the pageflip i-g-t tests. Random notes: - New design has per-crtc locks to protect the crtc input-side (pageflip, cursor) for r/w and the output state of the crtc (mode, dpms) as read-only. It also required completely revamped fb lifecycle management, those are now refcounted