From cfd48ad8c4a9137b0fde7f0ecf463d44b01875dc Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Tue, 22 Aug 2023 14:30:15 +0300 Subject: drm/i915: Fix HPD polling, reenabling the output poll work as needed MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit After the commit in the Fixes: line below, HPD polling stopped working on i915, since after that change calling drm_kms_helper_poll_enable() doesn't restart drm_mode_config::output_poll_work if the work was stopped (no connectors needing polling) and enabling polling for a connector (during runtime suspend or detecting an HPD IRQ storm). After the above change calling drm_kms_helper_poll_enable() is a nop after it's been called already and polling for some connectors was disabled/re-enabled. Fix this by calling drm_kms_helper_poll_reschedule() added in the previous patch instead, which reschedules the work whenever expected. Fixes: d33a54e3991d ("drm/probe_helper: sort out poll_running vs poll_enabled") CC: stable@vger.kernel.org # 6.4+ Cc: Dmitry Baryshkov Cc: dri-devel@lists.freedesktop.org Reviewed-by: Jouni Högander Signed-off-by: Imre Deak Link: https://patchwork.freedesktop.org/patch/msgid/20230822113015.41224-2-imre.deak@intel.com (cherry picked from commit 50452f2f76852322620b63e62922b85e955abe94) Signed-off-by: Rodrigo Vivi --- drivers/gpu/drm/i915/display/intel_hotplug.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_hotplug.c b/drivers/gpu/drm/i915/display/intel_hotplug.c index 0ff5ed46ae1e..69a83dcc1996 100644 --- a/drivers/gpu/drm/i915/display/intel_hotplug.c +++ b/drivers/gpu/drm/i915/display/intel_hotplug.c @@ -211,7 +211,7 @@ intel_hpd_irq_storm_switch_to_polling(struct drm_i915_private *dev_priv) /* Enable polling and queue hotplug re-enabling. */ if (hpd_disabled) { - drm_kms_helper_poll_enable(&dev_priv->drm); + drm_kms_helper_poll_reschedule(&dev_priv->drm); mod_delayed_work(dev_priv->unordered_wq, &dev_priv->display.hotplug.reenable_work, msecs_to_jiffies(HPD_STORM_REENABLE_DELAY)); @@ -661,7 +661,7 @@ static void i915_hpd_poll_init_work(struct work_struct *work) drm_connector_list_iter_end(&conn_iter); if (enabled) - drm_kms_helper_poll_enable(&dev_priv->drm); + drm_kms_helper_poll_reschedule(&dev_priv->drm); mutex_unlock(&dev_priv->drm.mode_config.mutex); -- cgit v1.2.3