From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lyude Paul Subject: [PATCH v4 4/5] drm/i915: Clarify flow for disabling IRQs on storms Date: Mon, 5 Nov 2018 17:20:10 -0500 Message-ID: <20181105222011.2913-5-lyude@redhat.com> References: <20181105222011.2913-1-lyude@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20181105222011.2913-1-lyude@redhat.com> Sender: linux-kernel-owner@vger.kernel.org To: intel-gfx@lists.freedesktop.org Cc: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= , Rodrigo Vivi , Jani Nikula , Joonas Lahtinen , David Airlie , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org List-Id: dri-devel@lists.freedesktop.org This is rather confusing to look at as-is: dev_priv->display.hpd_irq_setup(dev_priv); in intel_hpd_irq_handler() handles disabling the actual HPD IRQ, while intel_hpd_irq_storm_disable() handles moving the HPD pin state over from MARK_DISABLED to DISABLED along with enabling polling for it. Changes since v3: - Rename i915_hpd_irq_storm_disable() to i915_hpd_irq_storm_switch_to_polling() - Rodrigo Vivi Cc: Ville Syrjälä Signed-off-by: Lyude Paul Cc: Rodrigo Vivi --- drivers/gpu/drm/i915/intel_hotplug.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_hotplug.c b/drivers/gpu/drm/i915/intel_hotplug.c index c11d73de16f2..d642c0795452 100644 --- a/drivers/gpu/drm/i915/intel_hotplug.c +++ b/drivers/gpu/drm/i915/intel_hotplug.c @@ -161,7 +161,8 @@ static bool intel_hpd_irq_storm_detect(struct drm_i915_private *dev_priv, return storm; } -static void intel_hpd_irq_storm_disable(struct drm_i915_private *dev_priv) +static void +intel_hpd_irq_storm_switch_to_polling(struct drm_i915_private *dev_priv) { struct drm_device *dev = &dev_priv->drm; struct intel_connector *intel_connector; @@ -351,8 +352,8 @@ static void i915_hotplug_work_func(struct work_struct *work) hpd_event_bits = dev_priv->hotplug.event_bits; dev_priv->hotplug.event_bits = 0; - /* Disable hotplug on connectors that hit an irq storm. */ - intel_hpd_irq_storm_disable(dev_priv); + /* Enable polling for connectors which had HPD IRQ storms */ + intel_hpd_irq_storm_switch_to_polling(dev_priv); spin_unlock_irq(&dev_priv->irq_lock); @@ -458,6 +459,10 @@ void intel_hpd_irq_handler(struct drm_i915_private *dev_priv, } } + /* + * Disable any IRQs that storms were detected on. Polling enablement + * happens later in our hotplug work. + */ if (storm_detected && dev_priv->display_irqs_enabled) dev_priv->display.hpd_irq_setup(dev_priv); spin_unlock(&dev_priv->irq_lock); -- 2.19.1