Re: [PATCH v3 01/26] drm/bridge: allow optionally specifying an owner .odev device

Heiko Stuebner
2018-05-19T16:08:18Z

Hi Peter,

Am Mittwoch, 16. Mai 2018, 12:14:45 CEST schrieb Peter Rosin:
> Bridge drivers can now (temporarily, in a transition phase) select if
> they want to provide a full owner device or keep just providing an
> of_node.
>
> By providing a full owner device, the bridge drivers no longer need
> to provide an of_node since that node is available via the owner
> device.
>
> When all bridge drivers provide an owner device, that will become
> mandatory and the .of_node member will be removed.
>
> There is an interaction with the rockchip lvds driver, since that
> driver peeks into somewhat private parts of the bridge struct in
> order to find out things about the remote bridge. When there are
> now two ways to get to the remote bridge, the rockchip lvds driver
> has to adapt. That said, the correct thing to do for the rockchip
> lvds driver is to use some other way than DT to find things out
> about the remote bridge, but that is orthogonal to this patch.
>
> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> Signed-off-by: Peter Rosin <peda@axentia.se>

> diff --git a/drivers/gpu/drm/rockchip/rockchip_lvds.c b/drivers/gpu/drm/rockchip/rockchip_lvds.c
> index 4bd94b167d2c..557e0079c98d 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_lvds.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_lvds.c
> @@ -377,8 +377,10 @@ static int rockchip_lvds_bind(struct device *dev, struct device *master,
> }
> if (lvds->panel)
> remote = lvds->panel->dev->of_node;
> - else
> + else if (lvds->bridge->of_node)
> remote = lvds->bridge->of_node;
> + else
> + remote = lvds->bridge->odev->of_node;
> if (of_property_read_string(dev->of_node, "rockchip,output", &name))
> /* default set it as output rgb */
> lvds->output = DISPLAY_OUTPUT_RGB;

for the Rockchip-part
Acked-by: Heiko Stuebner <heiko@sntech.de>