From 448aa9117cfa6591c4e18cb32a0329a66b9cd3b7 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Tue, 28 Nov 2017 11:01:47 +0000 Subject: [PATCH] drm/i915: Enable hotplug polling after registering the outputs Previously we would enable hotplug polling on the outputs immediately upon construction. This would allow a very early hotplug event to trigger before we had finishing setting up the driver to handle it. Instead, move the output polling to the last step of registration, after we have set up all handlers, including the fbdev configuration. v2: Symmetrically turnoff the hotplug helper in unregister after the fbdev is first synchronised then finalized. This stops a late hotplug event being processed after the interrupts are disabled. Signed-off-by: Chris Wilson Cc: Daniel Vetter Cc: Ville Syrjala Cc: Maarten Lankhorst Reviewed-by: Maarten Lankhorst #v1 Link: https://patchwork.freedesktop.org/patch/msgid/20171128110147.28654-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_drv.c | 16 ++++++++++++++-- drivers/gpu/drm/i915/intel_display.c | 5 +---- 2 files changed, 15 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 9c519aa..1c41989 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -693,8 +693,6 @@ static int i915_load_modeset_init(struct drm_device *dev) /* Only enable hotplug handling once the fbdev is fully set up. */ intel_hpd_init(dev_priv); - drm_kms_helper_poll_init(dev); - return 0; cleanup_gem: @@ -1255,6 +1253,13 @@ static void i915_driver_register(struct drm_i915_private *dev_priv) * cannot run before the connectors are registered. */ intel_fbdev_initial_config_async(dev); + + /* + * We need to coordinate the hotplugs with the asynchronous fbdev + * configuration, for which we use the fbdev->async_cookie. + */ + if (INTEL_INFO(dev_priv)->num_pipes) + drm_kms_helper_poll_init(dev); } /** @@ -1266,6 +1271,13 @@ static void i915_driver_unregister(struct drm_i915_private *dev_priv) intel_fbdev_unregister(dev_priv); intel_audio_deinit(dev_priv); + /* + * After flushing the fbdev (incl. a late async config which will + * have delayed queuing of a hotplug event), then flush the hotplug + * events. + */ + drm_kms_helper_poll_fini(&dev_priv->drm); + intel_gpu_ips_teardown(); acpi_video_unregister(); intel_opregion_unregister(dev_priv); diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index fec267d..76c75d3 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -15276,10 +15276,7 @@ static void intel_hpd_poll_fini(struct drm_device *dev) struct intel_connector *connector; struct drm_connector_list_iter conn_iter; - /* First disable polling... */ - drm_kms_helper_poll_fini(dev); - - /* Then kill the work that may have been queued by hpd. */ + /* Kill all the work that may have been queued by hpd. */ drm_connector_list_iter_begin(dev, &conn_iter); for_each_intel_connector_iter(connector, &conn_iter) { if (connector->modeset_retry_work.func) -- 2.7.4