Re: i915_driver_irq_handler: irq 42: nobody cared

Jiri Slaby
2012-04-10T18:11:34Z

On 04/10/2012 06:26 PM, Jesse Barnes wrote:
> So port hotplug is always reporting that port C has a hotplug
> interrupt though... If you write 0x3 back to it does the interrupt
> stop?

I'm not sure I got it right. This doesn't help:
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1416,6 +1416,17 @@ static irqreturn_t
i915_driver_irq_handler(DRM_IRQ_ARGS)
iir = new_iir;
}

+ if (ret == IRQ_NONE) {
+ u32 hp = I915_READ(PORT_HOTPLUG_STAT);
+ if (hp) {
+ I915_WRITE(PORT_HOTPLUG_STAT, hp);
+ I915_READ(PORT_HOTPLUG_STAT);
+ }
+
+ if (printk_ratelimit())
+ printk(KERN_DEBUG "%s: %.8x\n", __func__, hp);
+
+ }

return ret;
}

thanks,
--
js
suse labs