[Intel-gfx] [PATCH] drm/i915: ignore hotplug event across suspend

[Daniel Vetter]

On Mon, Mar 11, 2013 at 03:54:11AM +0000, Zhang, Xiong Y wrote:
> when system enter suspend, hibernate and poweroff state, it will
> disable modeset firstly, then disable irq, but some system generate
> hotplug event between disable modeset and disable irq, this will
> result in S3, S4 failure. So this hotplug event should be ignored.
> 
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=61508
> Signed-off-by: Xiong Zhang <xiong.y.zhang at intel.com>

Should be fixed with

commit b8efb17b3d687695b81485f606fc4e6c35a50f9a
Author: Zhang Rui <rui.zhang at intel.com>
Date:   Tue Feb 5 15:41:53 2013 +0800

    i915: ignore lid open event when resuming


Cheers, Daniel

> ---
>  drivers/gpu/drm/i915/i915_irq.c |    6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> index 2139714..68cc7a7 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -290,6 +290,12 @@ static void i915_hotplug_work_func(struct work_struct *work)
>         struct drm_device *dev = dev_priv->dev;
>         struct drm_mode_config *mode_config = &dev->mode_config;
>         struct intel_encoder *encoder;
> +
> +        /* some system generate hotplug envent when system enter sleep state.
> +         * it should be ignored.
> +         */
> +        if (dev_priv->mm.suspended)
> +            return;
> 
>         /* HPD irq before everything is fully set up. */
>         if (!dev_priv->enable_hotplug_processing)
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch