[Intel-gfx] [PATCH 4/4] drm/i915: emit a hotplug event on resume

[Rodrigo Vivi]

Reviewed-by: Rodrigo Vivi <rodrigo.vivi at gmail.com>


On Tue, Mar 26, 2013 at 1:25 PM, Jesse Barnes <jbarnes at virtuousgeek.org>wrote:

> This will poke userspace into probing for configuration changes that may
> have occurred across suspend/resume.
>
> Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
> ---
>  drivers/gpu/drm/i915/i915_drv.c |   20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.c
> b/drivers/gpu/drm/i915/i915_drv.c
> index bf57e1c..0cfc778 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -545,6 +545,24 @@ void intel_console_resume(struct work_struct *work)
>         console_unlock();
>  }
>
> +static void intel_resume_hotplug(struct drm_device *dev)
> +{
> +       struct drm_mode_config *mode_config = &dev->mode_config;
> +       struct intel_encoder *encoder;
> +
> +       mutex_lock(&mode_config->mutex);
> +       DRM_DEBUG_KMS("running encoder hotplug functions\n");
> +
> +       list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
> +               if (encoder->hot_plug)
> +                       encoder->hot_plug(encoder);
> +
> +       mutex_unlock(&mode_config->mutex);
> +
> +       /* Just fire off a uevent and let userspace tell us what to do */
> +       drm_helper_hpd_irq_event(dev);
> +}
> +
>  static int __i915_drm_thaw(struct drm_device *dev)
>  {
>         struct drm_i915_private *dev_priv = dev->dev_private;
> @@ -580,6 +598,8 @@ static int __i915_drm_thaw(struct drm_device *dev)
>                  * */
>                 intel_hpd_init(dev);
>                 dev_priv->enable_hotplug_processing = true;
> +               /* Config may have changed between suspend and resume */
> +               intel_resume_hotplug(dev);
>         }
>
>         intel_opregion_init(dev);
> --
> 1.7.9.5
>
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>



-- 
Rodrigo Vivi
Blog: http://blog.vivi.eng.br
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