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Date: Fri, 2 Nov 2018 20:19:07 -0400 From: Lyude Paul <lyude@...hat.com> To: intel-gfx@...ts.freedesktop.org Cc: Ville Syrjälä <ville.syrjala@...ux.intel.com>, Jani Nikula <jani.nikula@...ux.intel.com>, Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>, Rodrigo Vivi <rodrigo.vivi@...el.com>, David Airlie <airlied@...ux.ie>, dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org Subject: [PATCH v3 4/5] drm/i915: Clarify flow for disabling IRQs on storms 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. Cc: Ville Syrjälä <ville.syrjala@...ux.intel.com> Signed-off-by: Lyude Paul <lyude@...hat.com> --- drivers/gpu/drm/i915/intel_hotplug.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_hotplug.c b/drivers/gpu/drm/i915/intel_hotplug.c index c11d73de16f2..e5e3eeb7e482 100644 --- a/drivers/gpu/drm/i915/intel_hotplug.c +++ b/drivers/gpu/drm/i915/intel_hotplug.c @@ -351,7 +351,7 @@ 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. */ + /* Enable polling for connectors which had HPD IRQ storms */ intel_hpd_irq_storm_disable(dev_priv); spin_unlock_irq(&dev_priv->irq_lock); @@ -458,6 +458,10 @@ 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
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