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Date: Thu, 23 Jun 2016 10:10:09 -0400
From: Sean Paul <seanpaul@...omium.org>
To: Yakir Yang <ykk@...k-chips.com>
Cc: Mark Yao <yzq@...k-chips.com>, Inki Dae <inki.dae@...sung.com>,
Jingoo Han <jingoohan1@...il.com>,
Heiko Stuebner <heiko@...ech.de>,
Krzysztof Kozlowski <k.kozlowski@...sung.com>,
linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
linux-rockchip@...ts.infradead.org,
Daniel Vetter <daniel.vetter@...ll.ch>,
Emil Velikov <emil.l.velikov@...il.com>,
Douglas Anderson <dianders@...omium.org>,
dri-devel <dri-devel@...ts.freedesktop.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Javier Martinez Canillas <javier@....samsung.com>,
Tomasz Figa <tomasz.figa@...omium.com>,
Stéphane Marchesin <marcheu@...omium.org>,
Thierry Reding <treding@...dia.com>,
Dan Carpenter <dan.carpenter@...cle.com>
Subject: Re: [PATCH v3 06/10] drm/rockchip: analogix_dp: make panel detect to
an optional action
On Tue, Jun 14, 2016 at 7:46 AM, Yakir Yang <ykk@...k-chips.com> wrote:
> Some boards don't need to declare a panel device node, like the
> display interface is DP monitors, so it's necessary to make the
> panel detect to an optional action.
>
> Signed-off-by: Yakir Yang <ykk@...k-chips.com>
> Acked-by: Mark Yao <mark.yao@...k-chips.com>
> ---
> Changes in v3:
> - Add the acked flag from Mark.
>
> Changes in v2: None
>
> drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 48 ++++++++++++-------------
> 1 file changed, 22 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> index bcd9ecc..da2e844 100644
> --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> @@ -332,38 +332,34 @@ static int rockchip_dp_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> struct device_node *panel_node, *port, *endpoint;
> + struct drm_panel *panel = NULL;
> struct rockchip_dp_device *dp;
> - struct drm_panel *panel;
>
> port = of_graph_get_port_by_id(dev->of_node, 1);
> - if (!port) {
> - dev_err(dev, "can't find output port\n");
> - return -EINVAL;
> - }
> -
> - endpoint = of_get_child_by_name(port, "endpoint");
> - of_node_put(port);
> - if (!endpoint) {
> - dev_err(dev, "no output endpoint found\n");
> - return -EINVAL;
> - }
> -
> - panel_node = of_graph_get_remote_port_parent(endpoint);
> - of_node_put(endpoint);
> - if (!panel_node) {
> - dev_err(dev, "no output node found\n");
> - return -EINVAL;
> - }
> -
> - panel = of_drm_find_panel(panel_node);
> - if (!panel) {
> - DRM_ERROR("failed to find panel\n");
> + if (port) {
> + endpoint = of_get_child_by_name(port, "endpoint");
> + of_node_put(port);
> + if (!endpoint) {
> + dev_err(dev, "no output endpoint found\n");
> + return -EINVAL;
> + }
> +
> + panel_node = of_graph_get_remote_port_parent(endpoint);
> + of_node_put(endpoint);
> + if (!panel_node) {
> + dev_err(dev, "no output node found\n");
> + return -EINVAL;
> + }
> +
> + panel = of_drm_find_panel(panel_node);
> + if (!panel) {
> + DRM_ERROR("failed to find panel\n");
> + of_node_put(panel_node);
> + return -EPROBE_DEFER;
> + }
> of_node_put(panel_node);
Minor nit: Move of_node_put(panel_node) directly below
of_drm_find_panel to avoid duplicating it in both error and normal
paths (like you've done above).
Sean
> - return -EPROBE_DEFER;
> }
>
> - of_node_put(panel_node);
> -
> dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
> if (!dp)
> return -ENOMEM;
> --
> 1.9.1
>
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
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