Re: [PATCH 10/13] drm/atmel-hlcdc: Stop using plane->fb

From: Daniel Vetter <daniel@ffwll.ch>
To: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
	intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
	Boris Brezillon <boris.brezillon@free-electrons.com>
Subject: Re: [PATCH 10/13] drm/atmel-hlcdc: Stop using plane->fb
Date: Thu, 5 Apr 2018 18:38:40 +0200	[thread overview]
Message-ID: <20180405163840.GE3881@phenom.ffwll.local> (raw)
In-Reply-To: <20180405151400.11326-10-ville.syrjala@linux.intel.com>

On Thu, Apr 05, 2018 at 06:13:57PM +0300, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> 
> We want to get rid of plane->fb on atomic drivers. Stop looking at it.
> 
> Daniel pointed out that the drm_framebuffer_put() in the plane cleanup
> indicates that the driver doesn't shut things down cleanly. To do
> that we should be able to just call drm_atomic_helper_shutdown(). Not
> really sure the current cleanup sequence is actually sane, but whatever.
> 
> v2: Replace the drm_framebuffer_put() with
>     drm_atomic_helper_shutdown() (Daniel)
> 
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>  drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c    |  1 +
>  drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c | 12 +-----------
>  2 files changed, 2 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
> index c1ea5c36b006..843cac222e60 100644
> --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
> +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
> @@ -681,6 +681,7 @@ static void atmel_hlcdc_dc_unload(struct drm_device *dev)
>  	drm_fb_cma_fbdev_fini(dev);
>  	flush_workqueue(dc->wq);
>  	drm_kms_helper_poll_fini(dev);
> +	drm_atomic_helper_shutdown(dev);

Yeah, looks like the right place for this.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

>  	drm_mode_config_cleanup(dev);
>  
>  	pm_runtime_get_sync(dev->dev);
> diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
> index 9271c2fa3d79..8ecf02db8d01 100644
> --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
> +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
> @@ -820,16 +820,6 @@ static void atmel_hlcdc_plane_atomic_disable(struct drm_plane *p,
>  	atmel_hlcdc_layer_read_reg(&plane->layer, ATMEL_HLCDC_LAYER_ISR);
>  }
>  
> -static void atmel_hlcdc_plane_destroy(struct drm_plane *p)
> -{
> -	struct atmel_hlcdc_plane *plane = drm_plane_to_atmel_hlcdc_plane(p);
> -
> -	if (plane->base.fb)
> -		drm_framebuffer_put(plane->base.fb);
> -
> -	drm_plane_cleanup(p);
> -}
> -
>  static int atmel_hlcdc_plane_atomic_set_property(struct drm_plane *p,
>  						 struct drm_plane_state *s,
>  						 struct drm_property *property,
> @@ -1039,7 +1029,7 @@ static void atmel_hlcdc_plane_atomic_destroy_state(struct drm_plane *p,
>  static const struct drm_plane_funcs layer_plane_funcs = {
>  	.update_plane = drm_atomic_helper_update_plane,
>  	.disable_plane = drm_atomic_helper_disable_plane,
> -	.destroy = atmel_hlcdc_plane_destroy,
> +	.destroy = drm_plane_cleanup,
>  	.reset = atmel_hlcdc_plane_reset,
>  	.atomic_duplicate_state = atmel_hlcdc_plane_atomic_duplicate_state,
>  	.atomic_destroy_state = atmel_hlcdc_plane_atomic_destroy_state,
> -- 
> 2.16.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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