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    SubjectRe: i915_driver_irq_handler: irq 42: nobody cared
    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




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