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drm/i915: Clarify irq_lock locking, intel_tv_detect 

->detect callbacks are only ever called from process context, and
there's no fancy nesting going on here. So plain _irq spinlock
variants is what we want.

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 14:55:25 +02:00
parent 5b254c5978
commit 2795aa4864
1 changed files with 4 additions and 5 deletions
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9
drivers/gpu/drm/i915/intel_tv.c
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@ -1182,18 +1182,17 @@ intel_tv_detect_type(struct intel_tv *intel_tv,
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct drm_device *dev = encoder->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned long irqflags;
u32 tv_ctl, save_tv_ctl;
u32 tv_dac, save_tv_dac;
int type;
/* Disable TV interrupts around load detect or we'll recurse */
if (connector->polled & DRM_CONNECTOR_POLL_HPD) {
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
spin_lock_irq(&dev_priv->irq_lock);
i915_disable_pipestat(dev_priv, 0,
PIPE_HOTPLUG_INTERRUPT_STATUS |
PIPE_HOTPLUG_TV_INTERRUPT_STATUS);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
spin_unlock_irq(&dev_priv->irq_lock);
}
save_tv_dac = tv_dac = I915_READ(TV_DAC);
@ -1266,11 +1265,11 @@ intel_tv_detect_type(struct intel_tv *intel_tv,
/* Restore interrupt config */
if (connector->polled & DRM_CONNECTOR_POLL_HPD) {
spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
spin_lock_irq(&dev_priv->irq_lock);
i915_enable_pipestat(dev_priv, 0,
PIPE_HOTPLUG_INTERRUPT_STATUS |
PIPE_HOTPLUG_TV_INTERRUPT_STATUS);
spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
spin_unlock_irq(&dev_priv->irq_lock);
}
return type;