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drm/i915: Clarify irq_lock locking, work functions

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Work functions are in process context, so plain _irq spinlock variants
is all we need.

The hpd reenable work didn't follow the _work/_work_func postfix
naming scheme, so adjust that while at it.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2014-09-15 14:55:26 +02:00
parent 2795aa4864
commit 4cb2183228
1 changed files with 12 additions and 16 deletions
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28
drivers/gpu/drm/i915/i915_irq.c
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@ -1096,18 +1096,17 @@ static void i915_digport_work_func(struct work_struct *work)
{
struct drm_i915_private *dev_priv =
container_of(work, struct drm_i915_private, dig_port_work);
unsigned long irqflags;
u32 long_port_mask, short_port_mask;
struct intel_digital_port *intel_dig_port;
int i, ret;
u32 old_bits = 0;
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
spin_lock_irq(&dev_priv->irq_lock);
long_port_mask = dev_priv->long_hpd_port_mask;
dev_priv->long_hpd_port_mask = 0;
short_port_mask = dev_priv->short_hpd_port_mask;
dev_priv->short_hpd_port_mask = 0;
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
spin_unlock_irq(&dev_priv->irq_lock);
for (i = 0; i < I915_MAX_PORTS; i++) {
bool valid = false;
@ -1132,9 +1131,9 @@ static void i915_digport_work_func(struct work_struct *work)
}
if (old_bits) {
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
spin_lock_irq(&dev_priv->irq_lock);
dev_priv->hpd_event_bits |= old_bits;
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
spin_unlock_irq(&dev_priv->irq_lock);
schedule_work(&dev_priv->hotplug_work);
}
}
@ -1153,7 +1152,6 @@ static void i915_hotplug_work_func(struct work_struct *work)
struct intel_connector *intel_connector;
struct intel_encoder *intel_encoder;
struct drm_connector *connector;
unsigned long irqflags;
bool hpd_disabled = false;
bool changed = false;
u32 hpd_event_bits;
@ -1161,7 +1159,7 @@ static void i915_hotplug_work_func(struct work_struct *work)
mutex_lock(&mode_config->mutex);
DRM_DEBUG_KMS("running encoder hotplug functions\n");
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
spin_lock_irq(&dev_priv->irq_lock);
hpd_event_bits = dev_priv->hpd_event_bits;
dev_priv->hpd_event_bits = 0;
@ -1195,7 +1193,7 @@ static void i915_hotplug_work_func(struct work_struct *work)
msecs_to_jiffies(I915_REENABLE_HOTPLUG_DELAY));
}
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
spin_unlock_irq(&dev_priv->irq_lock);
list_for_each_entry(connector, &mode_config->connector_list, head) {
intel_connector = to_intel_connector(connector);
@ -1490,7 +1488,6 @@ static void ivybridge_parity_work(struct work_struct *work)
u32 error_status, row, bank, subbank;
char *parity_event[6];
uint32_t misccpctl;
unsigned long flags;
uint8_t slice = 0;
/* We must turn off DOP level clock gating to access the L3 registers.
@ -1549,9 +1546,9 @@ static void ivybridge_parity_work(struct work_struct *work)
out:
WARN_ON(dev_priv->l3_parity.which_slice);
spin_lock_irqsave(&dev_priv->irq_lock, flags);
spin_lock_irq(&dev_priv->irq_lock);
gen5_enable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv->dev));
spin_unlock_irqrestore(&dev_priv->irq_lock, flags);
spin_unlock_irq(&dev_priv->irq_lock);
mutex_unlock(&dev_priv->dev->struct_mutex);
}
@ -4606,19 +4603,18 @@ static void i965_irq_uninstall(struct drm_device * dev)
I915_WRITE(IIR, I915_READ(IIR));
}
static void intel_hpd_irq_reenable(struct work_struct *work)
static void intel_hpd_irq_reenable_work(struct work_struct *work)
{
struct drm_i915_private *dev_priv =
container_of(work, typeof(*dev_priv),
hotplug_reenable_work.work);
struct drm_device *dev = dev_priv->dev;
struct drm_mode_config *mode_config = &dev->mode_config;
unsigned long irqflags;
int i;
intel_runtime_pm_get(dev_priv);
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
spin_lock_irq(&dev_priv->irq_lock);
for (i = (HPD_NONE + 1); i < HPD_NUM_PINS; i++) {
struct drm_connector *connector;
@ -4642,7 +4638,7 @@ static void intel_hpd_irq_reenable(struct work_struct *work)
}
if (dev_priv->display.hpd_irq_setup)
dev_priv->display.hpd_irq_setup(dev);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
spin_unlock_irq(&dev_priv->irq_lock);
intel_runtime_pm_put(dev_priv);
}
@ -4668,7 +4664,7 @@ void intel_irq_init(struct drm_device *dev)
i915_hangcheck_elapsed,
(unsigned long) dev);
INIT_DELAYED_WORK(&dev_priv->hotplug_reenable_work,
intel_hpd_irq_reenable);
intel_hpd_irq_reenable_work);
pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE);