Re: [PATCH 4/4] drm/i915: emit a hotplug event on resume

Rodrigo Vivi
2013-03-26T16:43:54Z

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

On Tue, Mar 26, 2013 at 1:25 PM, Jesse Barnes <jbarnes@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@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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