From: Egbert Eich <eich@suse.de>
To: intel-gfx@lists.freedesktop.org
Cc: Egbert Eich <eich@suse.de>, Chris Wilson <chris.wilson@intel.com>,
Rodrigo Vivi <rodrigo.vivi@intel.com>
Subject: [PATCH v.2 09/12] DRM/i915: Disable HPD interrupt on pin when irq storm is detected (v2)
Date: Tue, 5 Mar 2013 07:34:38 -0500 [thread overview]
Message-ID: <1362486878-14407-1-git-send-email-eich@suse.de> (raw)
In-Reply-To: <1361812019-20099-10-git-send-email-eich@suse.de>
This patch disables hotplug interrupts if an 'interrupt storm'
has been detected.
Noise on the interrupt line renders the hotplug interrupt useless:
each hotplug event causes the devices to be rescanned which will
will only increase the system load.
Thus disable the hotplug interrupts and fall back to periodic
device polling.
v2: Fixed cleanup typo.
Signed-off-by: Egbert Eich <eich@suse.de>
---
drivers/gpu/drm/i915/i915_irq.c | 69 ++++++++++++++++++++++++++++++---------
1 files changed, 53 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index d9c99d7..0abef6a 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -87,7 +87,8 @@ static const u32 hpd_status_i915[] = { /* i915 and valleyview are the same */
[HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
};
-
+static void ibx_hpd_irq_setup(struct drm_device *dev);
+static void i915_hpd_irq_setup(struct drm_device *dev);
/* For display hotplug interrupt */
static void
@@ -338,7 +339,11 @@ static void i915_hotplug_work_func(struct work_struct *work)
hotplug_work);
struct drm_device *dev = dev_priv->dev;
struct drm_mode_config *mode_config = &dev->mode_config;
- struct intel_encoder *encoder;
+ struct intel_connector *intel_connector;
+ struct intel_encoder *intel_encoder;
+ struct drm_connector *connector;
+ unsigned long irqflags;
+ bool connector_disabled = false;
/* HPD irq before everything is fully set up. */
if (!dev_priv->enable_hotplug_processing)
@@ -347,9 +352,29 @@ static void i915_hotplug_work_func(struct work_struct *work)
mutex_lock(&mode_config->mutex);
DRM_DEBUG_KMS("running encoder hotplug functions\n");
- list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
- if (encoder->hot_plug)
- encoder->hot_plug(encoder);
+ spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
+ list_for_each_entry(connector, &mode_config->connector_list, head) {
+ intel_connector = to_intel_connector(connector);
+ intel_encoder = intel_connector->encoder;
+ if (intel_encoder->hpd_pin > HPD_NONE &&
+ dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_MARK_DISABLED &&
+ connector->polled == DRM_CONNECTOR_POLL_HPD) {
+ pr_warn("HPD interrupt storm detected on connector %s disabling\n",
+ drm_get_connector_name(connector));
+ dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark = HPD_DISABLED;
+ connector->polled = DRM_CONNECTOR_POLL_CONNECT
+ | DRM_CONNECTOR_POLL_DISCONNECT;
+ connector_disabled = true;
+ }
+ }
+ if (connector_disabled)
+ drm_kms_helper_poll_enable(dev); /* if there were no outputs to poll, poll is disabled */
+
+ spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
+
+ list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
+ if (intel_encoder->hot_plug)
+ intel_encoder->hot_plug(intel_encoder);
mutex_unlock(&mode_config->mutex);
@@ -578,13 +603,14 @@ static void gen6_queue_rps_work(struct drm_i915_private *dev_priv,
queue_work(dev_priv->wq, &dev_priv->rps.work);
}
-static inline void hotplug_irq_storm_detect(struct drm_device *dev,
+static inline bool hotplug_irq_storm_detect(struct drm_device *dev,
u32 hotplug_trigger,
const u32 *hpd)
{
drm_i915_private_t *dev_priv = dev->dev_private;
unsigned long irqflags;
int i;
+ bool ret = false;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
@@ -598,12 +624,15 @@ static inline void hotplug_irq_storm_detect(struct drm_device *dev,
} else if (dev_priv->hpd_stats[i].hpd_cnt > 5) {
dev_priv->hpd_stats[i].hpd_mark = HPD_MARK_DISABLED;
DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", i);
+ ret = true;
} else
dev_priv->hpd_stats[i].hpd_cnt++;
}
}
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
+
+ return ret;
}
static void gmbus_irq_handler(struct drm_device *dev)
@@ -679,7 +708,8 @@ static irqreturn_t valleyview_irq_handler(int irq, void *arg)
DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
hotplug_status);
if (hotplug_trigger) {
- hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_status_i915);
+ if( hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_status_i915))
+ i915_hpd_irq_setup(dev);
queue_work(dev_priv->wq,
&dev_priv->hotplug_work);
}
@@ -709,7 +739,8 @@ static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
if (hotplug_trigger) {
- hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_ibx);
+ if (hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_ibx))
+ ibx_hpd_irq_setup(dev);
queue_work(dev_priv->wq, &dev_priv->hotplug_work);
}
if (pch_iir & SDE_AUDIO_POWER_MASK)
@@ -757,7 +788,8 @@ static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
if (hotplug_trigger) {
- hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_cpt);
+ if (hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_cpt))
+ ibx_hpd_irq_setup(dev);
queue_work(dev_priv->wq, &dev_priv->hotplug_work);
}
if (pch_iir & SDE_AUDIO_POWER_MASK_CPT)
@@ -2034,12 +2066,14 @@ static void ibx_hpd_irq_setup(struct drm_device *dev)
if (HAS_PCH_IBX(dev)) {
mask &= ~SDE_HOTPLUG_MASK;
list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
- mask |= hpd_ibx[intel_encoder->hpd_pin];
+ if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
+ mask |= hpd_ibx[intel_encoder->hpd_pin];
mask |= SDE_GMBUS | SDE_AUX_MASK;
} else {
mask &= ~SDE_HOTPLUG_MASK_CPT;
list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
- mask |= hpd_cpt[intel_encoder->hpd_pin];
+ if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
+ mask |= hpd_cpt[intel_encoder->hpd_pin];
mask |= SDE_GMBUS_CPT | SDE_AUX_MASK_CPT;
}
I915_WRITE(SDEIIR, I915_READ(SDEIIR));
@@ -2505,7 +2539,8 @@ static irqreturn_t i915_irq_handler(int irq, void *arg)
DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
hotplug_status);
if (hotplug_trigger) {
- hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_status_i915);
+ if (hotplug_irq_storm_detect(dev, hotplug_trigger, hpd_status_i915))
+ i915_hpd_irq_setup(dev);
queue_work(dev_priv->wq,
&dev_priv->hotplug_work);
}
@@ -2659,7 +2694,7 @@ static void i915_hpd_irq_setup(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
struct drm_mode_config *mode_config = &dev->mode_config;
- struct intel_encoder *encoder;
+ struct intel_encoder *intel_encoder;
u32 hotplug_en;
if (I915_HAS_HOTPLUG(dev)) {
@@ -2668,7 +2703,8 @@ static void i915_hpd_irq_setup(struct drm_device *dev)
/* Note HDMI and DP share hotplug bits */
/* enable bits are the same for all generations */
list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
- hotplug_en |= hpd_mask_i915[intel_encoder->hpd_pin];
+ if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
+ hotplug_en |= hpd_mask_i915[intel_encoder->hpd_pin];
/* Programming the CRT detection parameters tends
to generate a spurious hotplug event about three
seconds later. So just do it once.
@@ -2742,8 +2778,9 @@ static irqreturn_t i965_irq_handler(int irq, void *arg)
DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
hotplug_status);
if (hotplug_trigger) {
- hotplug_irq_storm_detect(dev, hotplug_trigger,
- IS_G4X(dev) ? hpd_status_gen4 : hpd_status_i965);
+ if (hotplug_irq_storm_detect(dev, hotplug_trigger,
+ IS_G4X(dev) ? hpd_status_gen4 : hpd_status_i965))
+ i915_hpd_irq_setup(dev);
queue_work(dev_priv->wq,
&dev_priv->hotplug_work);
}
--
1.7.7
next prev parent reply other threads:[~2013-03-05 13:56 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-10 15:02 [PATCH 0/8] Detect and deal with Interrupt 'Storms' from noisy Hotplug Lines Egbert Eich
2013-01-10 15:02 ` [PATCH 1/8] drm/i915: Remove pch_rq_mask from struct drm_i915_private Egbert Eich
2013-01-11 20:13 ` Daniel Vetter
2013-01-10 15:02 ` [PATCH 2/8] drm/i915: Set hotplug_supported_flag for all chipset generations Egbert Eich
2013-03-26 19:51 ` Jesse Barnes
2013-01-10 15:02 ` [PATCH 3/8] drm/i915: Add hpd status bit to struct intel_connector Egbert Eich
2013-03-26 19:53 ` Jesse Barnes
2013-01-10 15:02 ` [PATCH 4/8] drm/i915: Add Hotplug IRQ Storm detection Egbert Eich
2013-03-26 19:59 ` Jesse Barnes
2013-01-10 15:02 ` [PATCH 5/8] drm/i915: Move hotplug interrupt enable for i915/i965/valleyview into a separate function Egbert Eich
2013-03-26 20:04 ` Jesse Barnes
2013-01-10 15:02 ` [PATCH 6/8] drm/i915: Only enable hotplug irq when needed on Ironlake and later chips Egbert Eich
2013-01-10 15:02 ` [PATCH 7/8] drm/i915: When detecting a hotplug IRQ storm disable respective IRQs Egbert Eich
2013-01-10 15:02 ` [PATCH 8/8] drm/i915: Add Reenable Timer to turn Hotplug Detection back on Egbert Eich
2013-01-11 20:34 ` [PATCH 0/8] Detect and deal with Interrupt 'Storms' from noisy Hotplug Lines Daniel Vetter
2013-01-17 14:01 ` Egbert Eich
2013-01-17 14:45 ` Daniel Vetter
2013-01-22 13:22 ` Egbert Eich
2013-01-22 13:48 ` Daniel Vetter
2013-01-22 15:11 ` Egbert Eich
2013-02-25 17:06 ` [PATCH v.2 00/12] " Egbert Eich
2013-02-25 17:06 ` [PATCH v.2 01/12] DRM/i915: Remove valleyview_hpd_irq_setup Egbert Eich
2013-03-26 20:06 ` Jesse Barnes
2013-02-25 17:06 ` [PATCH v.2 02/12] DRM/I915: Add enum hpd_pin to intel_encoder Egbert Eich
2013-03-26 20:07 ` Jesse Barnes
2013-02-25 17:06 ` [PATCH v.2 03/12] DRM/i915: Convert HPD interrupts to make use of HPD pin assignment in encoders Egbert Eich
2013-02-28 0:12 ` Chris Wilson
2013-02-28 9:17 ` [PATCH v.2 03/12] DRM/i915: Convert HPD interrupts to make use of HPD pin assignment in encoders (v2) Egbert Eich
2013-03-26 20:08 ` [PATCH v.2 03/12] DRM/i915: Convert HPD interrupts to make use of HPD pin assignment in encoders Jesse Barnes
2013-02-25 17:06 ` [PATCH v.2 04/12] DRM/i915: Remove i965_hpd_irq_setup Egbert Eich
2013-02-25 17:06 ` [PATCH v.2 05/12] DRM/i915: Get rid if the 'hotplug_supported_mask' in struct drm_i915_private Egbert Eich
2013-03-26 21:06 ` Daniel Vetter
2013-03-27 15:08 ` Egbert Eich
2013-02-25 17:06 ` [PATCH v.2 06/12] DRM/i915: Add HPD IRQ storm detection Egbert Eich
2013-02-28 0:30 ` Chris Wilson
2013-02-28 9:19 ` [PATCH v.2 06/12] DRM/i915: Add HPD IRQ storm detection (v2) Egbert Eich
2013-03-03 18:07 ` Daniel Vetter
2013-03-05 7:38 ` [PATCH v.3 06/12] DRM/i915: Add HPD IRQ storm detection (v3) Egbert Eich
2013-03-05 7:48 ` [PATCH v.2 10/12] DRM/i915: Add Reenable Timer to turn Hotplug Detection back on (v2) Egbert Eich
2013-03-05 10:28 ` Ville Syrjälä
2013-03-05 12:26 ` [PATCH v.3 10/12] DRM/i915: Add Reenable Timer to turn Hotplug Detection back on (v3) Egbert Eich
2013-03-05 7:55 ` [PATCH v.2 11/12] DRM/i915: Add bit field to record which pins have received HPD events (v2) Egbert Eich
2013-03-05 13:00 ` [PATCH v.3 11/12] DRM/i915: Add bit field to record which pins have received HPD events (v3) Egbert Eich
2013-03-05 14:52 ` Egbert Eich
2013-02-25 17:06 ` [PATCH v.2 07/12] DRM/i915: (re)init HPD interrupt storm statistics Egbert Eich
2013-02-25 17:06 ` [PATCH v.2 08/12] DRM/i915: Treat hpd_irq_setup() for ironake and older generations the same way Egbert Eich
2013-02-25 17:06 ` [PATCH v.2 09/12] DRM/i915: Disable HPD interrupt on pin when irq storm is detected Egbert Eich
2013-03-05 12:34 ` Egbert Eich [this message]
2013-02-25 17:06 ` [PATCH v.2 10/12] DRM/i915: Add Reenable Timer to turn Hotplug Detection back on Egbert Eich
2013-03-27 15:12 ` Daniel Vetter
2013-02-25 17:06 ` [PATCH v.2 11/12] DRM/i915: Add bit field to record which pins have received HPD events Egbert Eich
2013-02-25 17:06 ` [PATCH v.2 12/12] DRM/i915: Only reprobe display on encoder which has received an HPD event Egbert Eich
2013-03-05 14:18 ` [PATCH v.3 " Egbert Eich
2013-02-28 0:46 ` [PATCH v.2 00/12] Detect and deal with Interrupt 'Storms' from noisy Hotplug Lines Chris Wilson
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