From 9a2eba337cacefc95b97c2726e3efdd435b3460e Mon Sep 17 00:00:00 2001 From: Peter Ujfalusi Date: Mon, 15 May 2017 12:04:31 +0300 Subject: drm/nouveau: Fix drm poll_helper handling Commit cae9ff036eea effectively disabled the drm poll_helper by checking the wrong flag to see if the driver should enable the poll or not: mode_config.poll_enabled is only set to true by poll_init and it is not indicating if the poll is enabled or not. nouveau_display_create() will initialize the poll and going to disable it right away. After poll_init() the mode_config.poll_enabled will be true, but the poll itself is disabled. To avoid the race caused by calling the poll_enable() from different paths, this patch will enable the poll from one place, in the nouveau_display_hpd_work(). In case the pm_runtime is disabled we will enable the poll in nouveau_drm_load() once. Fixes: cae9ff036eea ("drm/nouveau: Don't enabling polling twice on runtime resume") Signed-off-by: Peter Ujfalusi Reviewed-by: Lyude Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/nouveau_display.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'drivers/gpu/drm/nouveau/nouveau_display.c') diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c index 21b10f9840c9..549763f5e17d 100644 --- a/drivers/gpu/drm/nouveau/nouveau_display.c +++ b/drivers/gpu/drm/nouveau/nouveau_display.c @@ -360,6 +360,8 @@ nouveau_display_hpd_work(struct work_struct *work) pm_runtime_get_sync(drm->dev->dev); drm_helper_hpd_irq_event(drm->dev); + /* enable polling for external displays */ + drm_kms_helper_poll_enable(drm->dev); pm_runtime_mark_last_busy(drm->dev->dev); pm_runtime_put_sync(drm->dev->dev); @@ -413,10 +415,6 @@ nouveau_display_init(struct drm_device *dev) if (ret) return ret; - /* enable polling for external displays */ - if (!dev->mode_config.poll_enabled) - drm_kms_helper_poll_enable(dev); - /* enable hotplug interrupts */ list_for_each_entry(connector, &dev->mode_config.connector_list, head) { struct nouveau_connector *conn = nouveau_connector(connector); -- cgit v1.2.3