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Date:   Tue, 17 Jul 2018 09:21:52 +0200
From:   Lukas Wunner <lukas@wunner.de>
To:     Lyude Paul <lyude@redhat.com>
Cc:     nouveau@lists.freedesktop.org, David Airlie <airlied@linux.ie>,
        dri-devel@lists.freedesktop.org,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        linux-kernel@vger.kernel.org, Ben Skeggs <bskeggs@redhat.com>,
        Ville =?iso-8859-1?Q?Syrj=E4l=E4?= 
        <ville.syrjala@linux.intel.com>
Subject: Re: [Nouveau] [PATCH 2/5] drm/nouveau: Grab RPM ref while probing
 outputs
Message-ID: <20180717072152.GA16115@wunner.de>
References: <20180716235936.11268-1-lyude@redhat.com>
 <20180716235936.11268-3-lyude@redhat.com>
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On Mon, Jul 16, 2018 at 07:59:26PM -0400, Lyude Paul wrote:
> --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> @@ -2012,10 +2012,18 @@ nv50_disp_atomic_state_alloc(struct drm_device *dev)
>  	return &atom->state;
>  }
>  
> +static void
> +nouveau_output_poll_changed(struct drm_device *dev)
> +{
> +	pm_runtime_get_sync(dev->dev);
> +	drm_fb_helper_hotplug_event(dev->fb_helper);
> +	pm_runtime_put_autosuspend(dev->dev);
> +}
> +
>  static const struct drm_mode_config_funcs
>  nv50_disp_func = {
>  	.fb_create = nouveau_user_framebuffer_create,
> -	.output_poll_changed = drm_fb_helper_output_poll_changed,
> +	.output_poll_changed = nouveau_output_poll_changed,

It might make sense to provide a generic DRM helper for this.
Same for patch 3 in this series.

Thanks,

Lukas